WO1997002456A1

WO1997002456A1 - Cross flow fan and outdoor unit for an air-conditioner

Info

Publication number: WO1997002456A1
Application number: PCT/JP1996/001813
Authority: WO
Inventors: Yoshimasa Kikuchi; Kozo Yosinaga; Toru Inazuka; Mitsuhisa Nagao
Original assignee: Daikin Industries, Ltd.
Priority date: 1995-06-30
Filing date: 1996-06-27
Publication date: 1997-01-23

Abstract

A plurality of fan bodies (30, 30, ...) each having a plurality of vanes (40, 40,...) that extend in the direction of the rotating shaft and are disposed at irregular pitches in a circumferential direction are disposed in a direction of a rotating shaft. The vanes (40, 40,...) are formed such that the cross-sectional configuration (4S) thereof that is perpendicular to a rotating axis O is formed into a twisted shape about the rotating axis O twisting from one end faces of the vanes (40, 40,...) toward the other end faces thereof so that the cross-sectional configurations are identical relative to the rotating axis O at any cross-sectional point. In addition, the vanes (40, 40,...) of adjacent fan bodies (30, 30, ...) are continuous and especially the vanes (40, 40,...) are formed into a twisted shape such that the twist angle becomes 60° or greater in a state in which they are caused to extend from one end to the other end of the full length of the main body.

Description

Akira Itoda »Cross-floor fan and air conditioner outdoor unit [Technical field]

The present invention relates to a cross-flow fan and an outdoor unit of an air conditioner provided with the cross-flow fan, and particularly to a blade shape of a cross-floor fan and a countermeasure against a wind direction of blown air of the outdoor unit.

[Background Art]

In general, a cross flow fan is configured such that a plurality of partition plates are arranged in parallel with a predetermined interval in a direction of a rotation axis, and a plurality of blades are arranged in a circumferential direction between each partition plate. . One fan body is formed between the partition plate and the partition plate, and a so-called series is formed. For example, one main body is formed by 10 series.

On the other hand, in the above cross flow fan, the rotation noise generated at the frequency of the product of the number of rotations (N) and the number of blades (Z) due to the flow through vortex or interference with the tongue during rotation (hereinafter referred to as NZ sound) ) Was large.

Conventionally, in order to reduce this NZ sound, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 3-73697, the pitch of the wings is made random to make the pitch unequal. As disclosed in Japanese Unexamined Patent Application Publication No. Hei 6-1773886, the phases of the blades of each fan body are shifted to provide a so-called skew. As disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-193, the blades of each fan body are inclined, and as disclosed in Japanese Unexamined Patent Application Publication No. Hei. Some fan bodies have wings formed in different shapes. —Solutions—

In the cross-flow fans described above, those with unequal pitch or skew have straight wings, so that the interference sound in each fan body is generated in the same phase, so the NZ sound is sufficiently reduced. There was a problem that I could not do it.

In addition, when the wing was inclined, there was a problem that the outer diameter force was reduced. That is, as shown in FIGS. 27 and 28, the wings (b, b,... ′) Of the fan body (a) are separated from the partition plate (c) of the adjacent fan body (a). ) And the inner and outer edges of the wings (b, b,...) Are straight, so that the fan body (a) generally becomes almost drum-shaped. As a result, in the fan body (a), the outer diameter Dc at the center of the wing (b, b, '·') is smaller than the outer diameter Ds at both ends.

Therefore, at the center of the wings (b, b,...), There was a problem that the peripheral speed was lower than at both ends, resulting in lower performance. In particular, when the inclination angle of the wings (b, b,...) Is increased, the outer diameter becomes significantly smaller, and furthermore, depending on the manufacturing method, the wing cross-section is deformed and the performance is degraded. Atsuta.

Also, in the case of forming a step on the wing, there is a problem that the performance is reduced due to the formation of a portion having a smaller outer diameter.

As described above, in any cross-flow fan, the NZ sound is reduced by dispersing the interference sound so that it does not concentrate on a specific frequency, but the conventional reduction method disperses the interference sound. Therefore, the energy of the NZ sound has not been sufficiently reduced, and as a result, there has been a problem that the reducing power of the NZ sound is insufficient. On the other hand, conventionally, as disclosed in Japanese Patent Laid-Open Publication No. 1-212832, an outdoor unit of an air conditioner has been housed in a casing with a compressor and the like, and the air conditioner has been used. In the air passage in a single unit, a heat exchanger and a fan are housed and there is a vertical type. As the fan in the outdoor unit, a cross flow fan (a) is used as shown in FIG. The conventional cross-flow fan (d) has various powers as described above. Generally, a straight blade is used. In other words, the cross flow fan (d) is a fan body (f, f,...) In which a plurality of vertically extending wings (e, e,...) Are arranged in the circumferential direction. Each blade (e, e, ···) is formed as a straight blade parallel to the axis of rotation.

The cross flow fan (d) is installed vertically in the vertical direction, and is arranged parallel to the outlet (h) of the casing (g). Since the airflow direction AF from the cross flow fan (d) is immediately before the air outlet (h), a grill (i) is provided at the air outlet (h) to provide air Blowing direction The AF force is set diagonally upward. In other words, the air blowing direction AF is set diagonally upward to prevent a short circuit where the blown air goes around the suction port, prevent direct contact with the blown air force, and furthermore, the wall close to the blowout port (h). So that it is not affected by obstacles such as In the outdoor unit of the air conditioner described above, since the air blowing direction AF is deflected by the grill (O), the blown air directly hits the grill (i), and there is a problem that the pressure loss is large.

In addition, the air flow is disturbed on the surface of the grill (i), which is a source of noise, and there is a problem that noise cannot be reduced. In addition, since the air is deflected only by the grille (i), there is a problem that the air does not flow up sufficiently and a short circuit or the like cannot be completely prevented. The present invention has been made in view of such a point, and an object of the present invention is to reduce NZ noise by reducing the energy of interference sound in a cross flow fan and to reduce noise. Another object of the present invention is to reduce the pressure loss caused by the grill of the outdoor unit, to reduce noise, and to achieve a sufficient upward flow.

[Disclosure of the Invention]

Summary of the Invention—

In the present invention, the NZ sound is reduced by twisting the wings so that various types of interference sounds cancel each other.

Further, in another invention, the cross flow fan is formed by twisted blades so that the direction of air blowing from the cross flow fan itself is obliquely upward.

—Specific matters of the invention—

Specifically, the means taken by the invention described in claim 1 is as follows. First, a fan body (30, 30, 30,...) In which a plurality of blades (40, 40,...) Extending in the direction of the rotational axis are arranged in the circumferential direction. …) Is assumed to be a cross-flow fan in which a plurality of are arranged in the direction of the rotation axis. The wings (40, 40,…) are formed into a twisted shape that is twisted about the rotation axis 0 as going from one side end face to the other side end face of the wings (40, 40,…). Have been.

The means of the invention described in claim 2 is the invention according to claim 1, wherein the wings (40, 40,...) Each have an airfoil (4 S) having a transverse cross section orthogonal to the rotation axis 0. It is formed in a torsional shape that is twisted so as to have the same shape with respect to the rotation axis 0 even at the cross-sectional position of FIG. In the invention described in claim 1 or 2, the means implemented by the invention described in claim 3 is that the wings (40, 40,...) Of each fan body (30, 30,. The means according to the fourth aspect of the present invention is arranged on the blades of the adjacent fan bodies (30, 30). (40, 40,...) Are formed so as to be continuous, and the means taken by the invention according to claim 5 is that the wings (40, 40,...) Of the adjacent fan bodies (30, 30) are provided. ) Are formed so as to be in a discontinuous state, and the means of the invention according to claim 6 is a fan body (40, 40, ...) in which the torsional directions of the wings (40, 40, ...) are formed in the same direction. , 30), and the means taken by the invention according to claim 7 are two kinds of wings (40, 40,…) in which the torsional directions are formed in opposite directions. It is composed of fan bodies (30, 30,…). In the invention described in claim 1 or 2, the means of the invention described in claim 8 is that the wings (40, 40,...) Of each fan body (30, 30,...) The twisted shape is formed to have a twist angle of 60 ° or more in a state of being extended from one side end to the other side end of the fan. The wings (40, 40,…) of the body (30, 30,…) were formed in a twisted shape with a twist angle of 360 °, extending from one end of the body to the other end. Things.

In the invention described in claim 1 or 2, the means of the invention described in claim 10 is that the wings (40, 40,…) of each fan body (30, 30,…) It is formed in a torsion shape in which the torsion angle extends from 120 ° to 360 ° while extending from one side end to the other side end. The means is that the wings (40, 40,…) of each fan body (30, 30,…) extend from one end to the other end of the entire length of the body and have a twist angle of 150 ° or more. The means formed by the invention according to claim 12 is a wing (40, 40,...) Of each fan body (30, 30,...). Is formed in a torsion shape in which the torsion angle extends from 60 ° to 150 ° while extending from one end to the other end of the entire length of the main body. The means taken by the invention according to claim 13 is the invention according to claim 1 or 2, wherein the pitch of the blades (40, 40,…) of each fan body (30, 30,…) Those arranged in It is.

In the invention described in claim 13, means taken by the invention described in claim 14 is that the wings (40, 40,...) Of each fan body (30, 30,...) The torsion angle is formed in a torsion shape corresponding to one pitch of the wing (40, 40,...) In a state where the torsion angle is extended from one side end to the other side end of the entire length of the main body. The means of the invention described in 5 is that the wings (40, 40,...) Of each fan body (30, 30,...) Are located at one end of the fan body (30, 30,...). The twist angle from the tip to the other end is formed in a twist shape corresponding to one pitch of the wing (40, 40,...). The invention according to claim 16 is characterized in that, first, a suction port (71) and an air outlet (72) of outdoor air, a casing (70) formed with a force, and a suction port inside the casing (70). mouth

A heat exchanger (61) provided in an air passage (7A) formed from the air outlet (71) to the air outlet (72) and disposed in close proximity to the suction port (71); It is assumed that the outdoor unit of the air conditioner is provided at least with a cross flow fan (20) provided in the air passage (7A) of the air conditioner and vertically arranged close to the outlet (72).

In addition, the cross mouth fan (20) includes a plurality of blades extending in the rotation axis direction.

.. Are arranged in the circumferential direction, and a plurality of fan bodies (30, 30,...) Are arranged in the rotation axis direction. Furthermore, the wings (40, 40,...) Of each of the above-mentioned fan bodies (30, 30,...) Blow air just before the rotation axis 0 of the cross flow fan (20). The wings (40, 40, ...) are formed in a twisted shape that is twisted about the rotation axis 0 from one side end face to the other side end face so that the outgoing direction is inclined obliquely upward. .

In the invention according to claim 17, the blades (40, 40,...) Of the cross flow fan (20) are arranged so that the rotation axis is 0. An airfoil with an orthogonal cross section (4S) is formed in a twisted shape so that it has the same shape with respect to the rotation axis ◦ at any cross-sectional position. In the invention described in claim 16 or 17 above, the means taken by the invention described in claim 18 is that the fan body (30, 30, ...) of each fan body (30, 30, ...) of the cross flow fan (20) is provided. , 40,...) Are arranged at unequal pitch, and the means taken by the invention of claim 19 is that each of the fan bodies (30, 30,... The blades (40, 40,...) Of the adjacent fan bodies (30, 30) are formed so as to be continuous, and the means adopted by the invention according to claim 20 is a cross flow fan (20). ) Are formed so that the wings (40, 40,…) of the adjacent fan bodies (30, 30) are in a discontinuous state. 21 The means adopted by the invention described in 1 is that the fan bodies (30, 30, ...) of the cross-floor fan (20) have the same twist direction of the wings (40, 40, ...). And it is formed in the direction. Further, in the invention described in claim 16 or 17, the means taken by the invention described in claim 22 is that the blade (40) in each fan body (30, 30, ...) of the cross flow fan (20) is provided. , 40,...) Are formed in a twisted shape having a twist angle of 60 ° or more in a state of extending from one end of the entire length of the main body to the other end, and the invention according to claim 23. The measures taken by the cross flow fan (20) are as follows: the wings (40, 40,…) of each fan body (30, 30,…) of the cross flow fan (20) are extended from one end to the other end of the overall length of the main body. The twisted angle is set to be 180 °, and the means of the invention according to claim 24 is characterized in that each of the fan bodies (30, 30,...) Of the cross flow fan (20) is provided. The wings (40, 40,…) at) have a twisted shape with a twist angle of 360 ° when extended from one end of the main body to the other end. It was formed.

Further, in the invention described in claim 16 or 17, the means invented in claim 25 is characterized in that the wing (40) in each fan body (30, 30, ...) of the cross flow fan (20) is provided. , 40,…) are formed in a torsion shape that extends from one end to the other end of the overall length of the body and has a twist angle of 120 ° or more and 360 ° or less. The invention according to claim 26 The measures taken by the team were that the wings (40, 40,…) of each fan body (30, 30,…) of the cross flow fan (20) were extended from one end to the other end of the overall length of the body. 28. The means according to claim 27, wherein the torsion angle is in a range from 150 ° to 270 ° and the twist angle is from 150 ° to 270 °. The wings (40, 40,…) of the body (30, 30,…) extend from one end to the other end of the total length of the body, and have a twist angle of 60 ° or more and 150 ° or less. It is formed in a twisted shape. The measures taken by the invention according to claim 28 are the invention according to claim 16 or 17, wherein the blade (40, 40) of each fan body (30, 30, ...) of the cross flow fan (20) is provided. , 40, ...) are arranged at equal pitch. In the invention according to claim 28, the means adopted by the invention according to claim 29 is that the blades (40, 40,...) Of each fan body (30, 30,...) Of the cross flow fan (20) are provided. ) Is a shape in which the twist angle is formed in a twisted shape corresponding to one pitch of the wings (40, 40,...) In a state of extending from one side end to the other side end of the entire length of the main body. Means taken by the invention described in paragraph 0 is that the wings (40, 40,…) of each fan body (30, 30,…) of the cross flow fan (20) are one of the fan bodies (30, 30,…). The twist angle from the side end to the other end is formed in a twist shape corresponding to one pitch of the blade (40, 40,…). Further, the means of the present invention as claimed in claim 31 is the invention according to claim 16 or 17, wherein the upper wall (77) and the lower wall (77) of the outlet (72) in the casing (70) are provided. 77) is formed in a shape along the air blowing direction obliquely above.

-Action one

According to the configuration of the above-mentioned invention specifying matter, in the inventions of claims 1 to 15, each fan body (30, 30, · · ·) as a unit, the force that causes air to flow through each fan body (30, 30, · '·). For example, the wings (40, 40 , ■ ························································································································································· この · NZ sound power is generated at the same time. At this time, since the wing (40, 40, ···) force is formed in a twisted shape, the interference noises cancel each other out, the NZ sound is reduced, and the sound pressure level of the noise is reduced.

In particular, the wings (40, 40,...) Are set to a predetermined torsion angle of 0, compared to the chord length when the wings (40, 40, ...) are not twisted (twist angle = 0). Then, chord length power will be added. As a result, if the air volume per unit area of the wings (40, 40, ···) is equal, the air volume per rotation speed increases, and the performance improves.

The outer wings (40, 40,...) Are arc-shaped at the outer edge (41) and the inner edge (42), and are therefore smaller than the conventional linear wings (b, b,...). The outer diameters of the fan bodies (30, 30,...) Become equal without a drum-like shape over both ends. As a result, the peripheral speed at the center of the fan body (30, 30,...) Is higher than in the past, and the performance is improved. In the invention according to claims 16 to 31, when the cross flow fan (20) is driven to rotate, the outdoor air is sucked into the casing (70) from the suction port (71) and is cooled by the heat exchanger (61). After the heat exchange with the air, it flows through the air passage (7A), and then the outdoor air is blown out of the casing (70) from the outlet (72) through the cross-floor fan (20). .

At this time, the blowing direction of the cross flow fan (20) is obliquely upward. Specifically, since the wings (40, 40,...) Of the cross flow fan (20) are twisted about the rotation axis 0, the air blown from the cross flow fan (20) itself is rotated by the rotation axis. It blows out obliquely upward with respect to zero. Therefore, the cross flow fan (20) is installed vertically upright in parallel with the outlet (72). 9 In the invention according to claim 31, the upper wall (77) and the lower wall (77) of the outlet (72) in the casing (70) are formed in a shape along the obliquely upward air blowing direction. Therefore, the blown air deflected by the cross flow fan (20) flows smoothly without colliding with the upper wall (77). Effect of the Invention—

According to the invention as set forth in claims 1 to 15, the wings (40, 40,...) Of each fan body (30, 30,. The force at which the sound SW is generated as a sine wave with the pitch of the wings (40, 40,...) The phase of the interference sound SW is shifted at each wing (40, 40,. The interference sounds SW cancel each other, and the NZ sound can be reduced, and the sound pressure level of the noise can be reduced.

According to the second aspect of the present invention, the blades (40, 40,...) Of each fan body (30, 30,...) Rotate at any cross-sectional position of the airfoil (4S) force. Since it is formed to have the same shape with respect to the axis 0, the inflow angle and outflow angle of air can be the same at any cross-sectional position, so that the optimum inflow angle and outflow angle can be maintained, and the performance can be maintained. Can reliably be prevented from decreasing.

Since the wings (40, 40, ...) have a twisted shape compared to the case where the wings (40, 40, ...) are not twisted (twist angle 0, no force), the chord is Since the length can be increased, the air volume per rotation can be increased, and the performance can be improved.

Also, the outer wing (41) and inner rim (42) of the above wings (40, 40,...) Have an arc shape. Therefore, the outer diameter of the fan body (30, 30, ") can be made equal on both sides. As a result, the peripheral speed of the central part of the fan body (30, 30,. Speed, and the performance can be improved.

In particular, according to the invention of claim 8, the wings (40, 40,...) By setting the deflection angle to 0, the sound pressure level of the noise due to the simulation can be reduced over almost the entire range.

According to the tenth aspect of the present invention, by setting the torsion angle 0 of the wings (40, 40,...) In a range of 120 ° to 360 °, the broadband noise and the simulation can be reduced. The sound pressure level superimposed on the NZ sound becomes almost flat, and the sound pressure level of noise can be further reduced.

According to the invention of claim 11, by setting the torsion angle 0 of the wings (40, 40,...) In a range of 150 ° to 270 °, it is possible to reduce broadband noise by simulation. The sound pressure level superimposed on the NZ sound becomes almost the lowest value, and the sound pressure level of the noise can be reliably reduced.

According to the invention of claim 12, by setting the twist angle of the blades (40, 40,...) In the range of 60 ° to 150 °, The sound pressure level of the noise based on the simulation in which the broadband noise, the NZ sound, and the blowing sound are superimposed is almost the lowest value, and the sound pressure level of the overall noise can be reliably reduced.

Further, since the NZ sound can be reduced, the distance between the tongue (15) and the cross flow fan (20) can be set small. As a result, it is possible to increase the air volume per the same rotation speed.

In addition, since the surging area can be reduced, the overall shape can be reduced in thickness, and it can be used in a stable area.

According to the invention of claim 7, since the blades (40, 40,...) Are constituted by two types of fan bodies (30, 30,...) Having different torsion directions, Swirl flow can be suppressed.

According to the invention of claim 13, the wings (40, 40,...) Are arranged at an equal pitch, so that it is possible to improve the performance and at the same time cancel out the interference sound. NZ sound can be reduced. W 97/02456

According to the invention of claims 16 to 31, the cross flow fan (20) is configured so that the air blowing direction force from the cross mouth opening fan (20) is obliquely upward. Since the air blowing direction is deflected by the cross flow fan (20), the amount of deflection due to the grill can be reduced. As a result, the pressure loss of the air blown out by the grill can be reduced, so that the efficiency of the fan can be improved.

Further, since the turbulence of the air flow on the surface of the grill can be reduced, the source of noise can be suppressed, and noise can be reduced.

In addition, since the air blowing direction is deflected by the gross flow fan (20) and the grill, a sufficient upward blowing flow can be achieved. As a result, it is possible to reliably prevent a short circuit in which the blown air flows around the suction port (71), to prevent the blown air from directly hitting a person, and to reduce the force of the blowout (72). ) Can be prevented from being affected by obstacles such as walls that are close to).

In addition, since the cross-flow fan (20) of the torsion blades (40, 40,...) Is provided, the air blowing direction can be reliably obliquely upward, while the cross-flow fan (20) is Since it can be installed straight up and down, the installation space can be reduced, the size can be reduced, and the assembly work can be simplified. In particular, the cross flow fan (20) is twisted. Because of the wings (40, 40, ...), the deflection angle in the air blowing direction can be increased by increasing the torsion angle, so that the grill can be omitted and the structure can be simplified. Can be planned.

Since the cross flow fan (20) is composed of twisted blades (40, 40, ...), the interference sound has a sinusoidal wave with the pitch of the blades (40, 40, ...) as a period. However, since the phases of the interference sounds are shifted at each wing (40, 40, ...), the interference sounds cancel each other, NZ noise can be reduced, and the sound pressure level of noise can be reduced.

According to the invention of claim 17, the wings (40, 40,...) Of each fan body (30, 30,. Since it is formed to have the same shape with respect to the rotation axis, the inflow angle and outflow angle of air can be the same at any cross-sectional position, so that the optimum inflow angle and outflow angle can be maintained, and the performance can be maintained. Can be reliably prevented from decreasing.

Also, the wings (40, 40,...) Of each fan body (30, 30,...) Are not twisted (the twist angle is zero). ·) Has a twisted shape, so that the chord length can be increased, so that the air volume per rotation can be increased, and the performance can be improved.

Also, the outer wing and inner rim of the wing (40, 40, ...) have arc shapes, so the outer diameter at the center of the inclined wing (40, 40, ...) is smaller, The outer diameter of the fan body (30, 30,...) Can be made equal on both sides. As a result, the peripheral speed at the center of the fan body (30, 30,...) Can be increased, and performance can be improved.

According to the invention of claim 22, by setting the torsion angle 翼 of the wing (40, 40, '··) to a range of 60 ° or more, the blown air is surely made to be the upper stream. At the same time, the sound pressure level of the simulation noise can be reduced substantially throughout this range.

In particular, according to the invention of claim 23, by setting the torsion angle 0 of the wings (40, 40, ...) to 180 °, it is possible to surely make the blown air upward. At the same time, the sound pressure level of the simulation noise can be minimized over almost the entire range.

According to the invention of claim 25, by setting the helix angle 0 of the wings (40, 40,...) In the range of 120 ° to 360 °, the blown air can be reliably discharged. At the same time, the sound pressure level superimposed on the broadband noise and NZ sound by simulation The noise level becomes almost flat, and the sound pressure level of noise can be further reduced.

According to the invention of claim 26, by setting the helix angle 0 of the wings (40, 40, ...) in the range from 150 ° to 270 °, the blown air can be reliably discharged. Simultaneously with the upper stream, the sound pressure level obtained by superimposing the broadband noise and the NZ sound by simulation becomes almost the lowest value, and the sound pressure level of the noise can be reliably reduced.

According to the invention of claim 27, by setting the helix angle 0 of the wings (40, 40, ...) in the range of 60 ° to 150 °, the blown air can be reliably raised. At the same time, the sound pressure level of the simulation obtained by superimposing the broadband noise, the NZ sound, and the blowing sound in consideration of the swirling flow is almost the lowest, and the sound of the overall noise is assured. The pressure level can be reduced.

According to the invention of claim 31, the upper wall (27) and the lower wall (27) of the outlet (22) in the casing (20) are formed in a shape obliquely above the air blowing direction. Therefore, the blown air deflected by the cross flow fan (20) does not collide with the upper wall (27) and flows smoothly, so that pressure loss and noise can be reduced.

[Brief description of]

FIG. 1 is a cross-sectional view of the air conditioner.

FIG. 2 is a front view of the cross flow fan.

FIG. 3 is a partially omitted cross-sectional view taken along line I-I of FIG. FIG. 4 is a front view of the fan body.

Figure 5 is a perspective view of the wing.

FIG. 6 is a front view of the cross flow fan showing the torsional angles of the blades.

FIG. 7 is a developed view of the cascade and a waveform diagram of the interference sound.

FIG. 8 is a waveform diagram showing superposition of interference sounds.

Fig. 9 is a characteristic diagram of the sound pressure level of noise with respect to the torsion angle of the blade.

FIG. 10 is a front view of a cross flap one fan provided with a vertical flap. FIG. 11 is a schematic front view of the fan body showing the inclination of the air.

FIG. 12 is an explanatory diagram showing the air flow between the vertical flaps.

FIG. 13 is an explanatory diagram showing the chord length.

FIG. 14 is a characteristic diagram of the static pressure coefficient with respect to the flow coefficient.

FIG. 15 is a front view showing the crossed-mouth single fan according to the second embodiment.

FIG. 16 is a partially omitted cross-sectional view showing the cross opening fan of the third embodiment. FIG. 17 is a perspective view of a wing showing a riblet.

FIG. 18 is a schematic configuration diagram illustrating an outdoor unit of the air-conditioning apparatus according to Embodiment 4. FIG. 19 is a horizontal sectional view of the outdoor unit.

FIG. 20 is a longitudinal sectional view showing a main part of the outdoor unit.

FIG. 21 is a characteristic diagram of the air blowing angle with respect to the torsion angle of the blade.

FIG. 22 is a characteristic diagram of noise with respect to the torsion angle of the blade.

FIG. 23 is a cross-sectional view showing a part of the grill.

FIG. 24 is a cross-sectional view showing a part of Daryl when the present invention is applied. FIG. 25 is a vertical cross-sectional view illustrating a main part of the outdoor unit in the fifth embodiment.

FIG. 26 is a vertical cross-sectional view illustrating a main part of the outdoor unit in the sixth embodiment.

FIG. 27 is a side view showing a conventional inclined wing.

FIG. 28 is a front view of a fan main body provided with the blades of FIG. FIG. 29 is a longitudinal sectional view showing a main part of a conventional outdoor unit.

[Best Mode for Carrying Out the Invention]

One embodiment 11

Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.

As shown in Fig. 1, the wall-mounted air conditioner (10) is housed inside a casing (11) with a substantially inverted V-shaped heat exchanger (12) and a cross-floor fan. (20) It is configured to store power. The casing (11) has a suction port (13) formed from the upper front surface to the upper surface, and a blowout port (14) formed at the lower front portion.

Further, a tongue (15) for partitioning the inside of the casing (11) into a low-pressure side and a high-pressure side is formed in the interior of the casing (11) in proximity to the cross flow fan (20). Then, when the cross-floor fan (20) is rotated, the indoor air is sucked into the casing (11) from the suction port (13), and exchanges heat with the refrigerant in the heat exchanger (12) to generate hot or cold air. The conditioned air passes through the cross flow fan (20) and is blown into the room from the outlet (14). As shown in FIGS. 2 to 4, the cross-floor fan (20) is configured by arranging a plurality of fan bodies (30, 30,...) Constituting a so-called ream in the direction of the rotation axis. Each of the fan bodies (30, 30,…) is composed of a plurality of blades (40, 40,…) constituting a cascade arranged in the circumferential direction between partition plates (31, 31) on both sides. I have.

The fan bodies (30, 30,...) Are connected, for example, in series to form a main body (21), and the rotating bodies are attached to partition plates (31, 31) located on both sides of the main body (21). (22) A force is applied, and although not shown, a motor force is connected to the rotating shaft (22). The fan body (30, 30, ...) is formed in a circular cascade of 35 blades (40, 40, ...) arranged in the circumferential direction. The pitch of each wing (40, 40,…)? Strange Are arranged at irregular pitches. For example, the pitch P of the wings (40, 40, ...) is from 9.4 ° to 11.1. Is appropriately set in the range of.

As shown in FIG. 5, the wings (40, 40,...) Are formed into airfoil wings having a predetermined curvature from the outer edge (41) to the inner edge (42). 41) and the inner edge (42) are formed in a predetermined circular arc shape. As a feature of the present invention, the wings (40, 40, '...) of each of the fan bodies (30, 30, ...) are, as shown in FIG. The airfoil is formed in a torsion shape that is twisted about the rotation axis 0 as going from one side end face to the other side end face, and has a cross section orthogonal to the rotation axis 0.

(4S) is formed to have the same shape with respect to the rotation axis 0 at any cross-sectional position. In other words, the wings (40, 40,...) Are twisted in a spiral around the rotation axis 0, and are equal at any cross-sectional position of the air inflow angle, outflow angle, and force. Is twisted.

The wings (40, 40,...) Of each fan body (30, 30,...)

The wings (40, 40, ...) of (30, 30) are formed so as to be forcefully continuous, and the torsional directions of the wings (40, 40, ...) are formed in the same direction. For example, It is formed clockwise.

The torsion angle of the wings (40, 40,...) Is 360 ° when the torsion angle is 60 ° or more in the state where the wing extends from one end to the other end in the entire length of the main body (21). The wing shape is formed so as to be less than or equal to or less than or equal to 50 ° and less than or equal to 360 °. For example, as shown in Fig. 6, when the wings (40, 40, ...) of each fan body (30, 30, ...) are connected from the left end of the main body (21) to the right end, this continuous line The wings (40, 40, ...) are twisted.

—The reason for the twisted shape 1

Therefore, the basic reason for forming the wings (40, 40, · '·) into a twisted shape will be described. 9 First, Fig. 7 (a) shows a part of the cascade of the fan body (30, 30, ...) expanded, and each wing (40, 40, ...) force tongue is shown. When passing through (15), a sinusoidal interference sound SW (pressure wave) is generated as shown in Fig. 7 (b). Then, this interference sound SW is simultaneously generated in each blade row, that is, in the fan body (30, 30, '). Specifically, as shown in Fig. 6, if the torsion angle of the wings (40, 40, ...) described above is set to be 360 ° over the entire length of the main body (21), Fig. 7 (b) Interference sound of sinusoidal waveform SW force << will be generated simultaneously with a predetermined shift. Therefore, as shown in FIG. 8, since the interference sound SW is superimposed, the added value becomes zero, and the NZ sound is reduced.

On the other hand, Fig. 9 shows that the torsional angle (rotation angle) force of the wings (40, 40, ···) is 0 °, that is, it is 360 ° in the total length of the main body (21) from the untwisted one. It shows the sound pressure level (SPL) of noise when set as follows.

First, the noise of the cross flow fan (20) is generated by superimposing the broadband noise generated by the wind speed and the NZ sound generated at the frequency of the product of the rotation speed and the number of blades. Furthermore, in the first embodiment, since the wings (40, 40,...) Have a twisted shape, the blowing sound due to the swirling flow is superimposed.

The NZ sound, which is the above-mentioned interference sound, decreases as the torsion angle 0 increases as shown by the thin line A from the simulation, and becomes unitary when the torsion angle is set to 360 ° as described above. Next, broadband noise will be described. Generally, this broadband noise increases as the wind speed increases. In the simulation shown in FIG. 9 above, it is assumed that the air volume is the same at any torsion angle 0, and the relationship between the torsion angle 0 and the air volume is such that as the force, which will be described later, the torsion angle 6> increases, the air volume increases. descend. Thus, in Fig. 9, the wind speed passing through the cross fan and the fan (20) increases as the torsion angle 0 increases, and the rotation speed increases. Therefore, the broadband noise is reduced by the wings (40, 40, ...). ') Torsion angle 0 is 0. Up to 360 ° When changed, it rises as shown by the broken line B in FIG.

The blowing sound is generated by the vertical flap (16) provided in front of the cross flow fan (20) as shown in Fig. 10, and the wings (40, 40, ...) have a zero force twist angle. Due to the twist, the airflow AF blown from the cross flow fan (20) becomes oblique. For this reason, a separation phenomenon occurs in the vertical flap (16), and the passage between the vertical flaps (16) is narrowed, so that the blowing speed force is increased and the blowing sound is raised.

The sound pressure level ΔSPL of the blowing sound increases at the cube ratio of the blowing speed as shown in the following equation.

ASPL = 10 xlog (Ur / Ub) ³ …… ①

Ur: The blowing speed when the wings (40, 40,…) are twisted

Ub: The blowing speed when the wings (40, 40,…) are not twisted

Therefore, the inclination angle / 3 of the wings (40, 40,…) becomes one fan body (30) when the wings (40, 40,…) are twisted by 360 ° in 10 stations. In the series, the torsion angle 0 of the wings (40, 40,…) is 36 °, so the height H shown in Fig. 11 is

H = OxDo X 36) ÷ 360 = 25. 1 …… ②

β = tan- ¹ (H / N) = 23 ° …… ③

Becomes

Therefore, assuming that the torsion angle of the wing (40, 40,…) is 0, the inclination angle jS is (23/360). As shown in Fig. 12, when the torsion angle S is changed from 0 ° to 360 ° The sound pressure level ΔSPL of the blowing sound is derived from the speed ratio corresponding to the ratio (Wo / W) of the width Wo of the air flow to the interval W of the vertical flap (16) based on the above equation (2). From the above, when the broadband noise (broken line B) and the NZ sound (fine line A) are superimposed, the result is as shown by the solid line C in FIG. Further, when the broadband noise (broken line B), the NZ sound (fine line A), and the blowing sound are superimposed, the result is as shown by a solid line D in FIG. From the simulation in Fig. 9 described above, the torsion angle S of the wing (40, 40, ...) is lower for the NZ sound than for the maximum broadband noise 60. It is preferable to set it in the range from 360 ° to 360 °.

More preferably, the torsion angle 0 of the wings (40, 40,...) Is from 120 ° to 3 ° where the solid line C on which the broadband noise (dashed line B) and the NZ sound (fine line A) are superimposed becomes almost flat. It is preferable to set the angle in the range of 60 °.

More preferably, the torsion angle of the wing (40, 40,...) Is from 150 ° to 270 ° where the solid line C in which the broadband noise (dashed line B) and the NZ sound (fine line A) are superimposed has a substantially minimum value. It is more preferable to set it in the range of °.

When the vertical flaps (16, 16, ...) are applied and the swirling flow is taken into consideration, the solid line D obtained by superimposing the broadband noise (broken line B), the NZ sound (fine line A), and the blowing sound is obtained. It is more preferable to set the angle in the range from 60 ° to 150 ° which is almost the lowest value.

—Effect of Cross Flow Fan

Next, the operation of the cross flow fan (20) will be described.

When the cross-flow fan (20) is driven to rotate, indoor air is drawn into the casing (11) from the suction port (13) as shown by the airflow AF in Fig. 1, and the refrigerant and heat are passed through the heat exchanger (12). The conditioned air is replaced by warm or cold air, and this conditioned air is blown into the room from the outlet (14) through the cross flow fan (20).

Then, the air flows through the cross flow fan (20) (see the air flow AF in FIG. 1), but when the wings (40, 40,…) force pass near the tongue (15). NZ sound is generated or vortex AV is generated by the cross flow fan (20), and NZ sound power is generated when the wings (40, 40,…) pass through the vortex AV. At this time, the wings (40, 40,…) are formed in a torsional shape, so as shown in Fig. 9, interference noise SW forces cancel each other, reducing NZ noise and reducing the sound pressure level of noise Will be done. In particular, as shown in Fig. 13, the wings (40, 40,…) have a larger wing (40, 40,…) than the chord length Lb when the wings (40, 40, ...) are not twisted (twist angle 0 = 0). If the torsion angle is set to 0, the chord length Lv will increase by Lb / cos. As a result, assuming that the air volume per unit area of the wings (40, 40,…) is equal, the air volume per rotation increases due to the increase in chord length force, and the performance is improved.

In addition, as shown in Fig. 3, the outer wing (41) and the inner rim (42) of the wings (40, 40, ...) are arc-shaped, so that the conventional wings (40, 40, ...) have the shape shown in Figs. In addition, the outer diameter of the fan body (30, 30,...) Is equal at both ends, compared with the outer diameter Dc being smaller at the center of the wing (b, b,...). As a result, the peripheral speed at the center of the fan body (30, 30, ...) is higher than in the past, and the performance is improved. The effect of one crossf mouth one fan

As described above, according to the first embodiment, the wings (40, 40,...) Of the cross flow fan (20) are formed in a twisted shape, so that the interference sound SW is generated by the wings (40, 40,. The force that is generated as a sine wave with the pitch as the cycle The interference sound SWs are out of phase at each wing (40, 40,…), so the interference sound SWs cancel each other out, as shown in Figs. 9 and 13. In addition, the NZ sound can be reduced, and the sound pressure level of the noise can be reduced.

In addition, the chord length is increased because the wings (40, 40,…) have a twisted shape compared to the case where the wings (40, 40,…) are not twisted (twist angle = 0). As a result, the air volume per rotation can be increased, and the performance can be improved.

In addition, since the outer edge (41) and the inner edge (42) of the wing (40, 40,...) Are arc-shaped, as shown in FIGS. ,…)), The outer diameter of the fan body (30, 30,…) can be made equal on both sides, compared to the outer diameter Dc becoming smaller at the center of the fan body. As a result, the peripheral speed at the center of the fan body (30, 30,...) Can be made higher than before, and the performance can be improved. In particular, by setting the torsion angle 0 of the wings (40, 40, ...) in the range of 60 ° to 360 ° where the NZ sound is lower than the maximum broadband noise, almost all over this range Thus, the sound pressure level of the noise caused by the stain can be reduced.

The solid line C force obtained by the simulation in which the above broadband noise (broken line B) and the NZ sound (fine line A) are superimposed shows that the wings (40, 40) fall from 120 ° to 360 °, which is almost flat. , ...), the sound pressure level of noise can be further reduced.

In addition, the solid line C force obtained by the simulation in which the above broadband noise (broken line B) and the NZ sound (fine line A) are superimposed is almost the minimum value of 150. By setting the torsion angle 0 of the wings (40, 40,...) In the range from 270 ° to 270 °, the sound pressure level of noise can be reliably reduced.

Further, the solid line D force obtained by superimposing the broadband noise (broken line B), the NZ sound (fine line A), and the blowing sound in consideration of the swirling flow has a substantially minimum value from 60 ° to 150 °. By setting the torsional angle of the wings (40, 40,...) Within the range, the sound pressure level of the overall noise can be reliably reduced.

The blades (40, 40,...) Of each of the fan bodies (30, 30,...) Have the same shape with respect to the rotation axis 0 at any cross-sectional position of the airfoil (4S). Since the air inlet and outlet angles can be made the same at any cross-sectional position, the optimum inlet and outlet angles can be maintained and the performance can be reliably prevented from deteriorating. it can.

Further, as shown in FIG. 14, since the surging area can be reduced, the overall shape can be made thinner. That is, the curve X in FIG. 14 shows a conventional example in which the distance between the tongue (15) and the cross flow fan (20) is 7 mm, and the curve Y is FIG. 14 shows the first embodiment in which the distance between (15) and the cross flow fan (20) is 3 ran. C From this FIG. 14, the surging of the first embodiment is compared with the conventional surging area S 1. The area S2 can be reduced, and the overall shape can be made thinner. Further, the curve M in FIG. 16 shows the resistance characteristics of the machine, and the intersection of each variation curve X and variation curve Y becomes a use point, and can be used in a more stable area than before. In the first embodiment, the torsion angle 0 of the wings (40, 40,...) Is set to a range up to 360 °, but is set to 50 ° or more, that is, 360. In other words, it is only necessary that the interference sound SW is canceled by each other and the NZ sound is reduced. Embodiment 2 of One Invention—

In the second embodiment, as shown in FIG. 15, the wing (40, 40,...) Force of each fan body (30, 30,...) In the first embodiment is continuous. The wings (40, 40, ...) of each fan body (30, 30, ...) are discontinuous. In other words, FIG. 15 (a) shows the arrangement of the fan bodies (30, 30,...) So that the blades (40, 40,. If the fan bodies (30, 30,...) Are defined as ① to ⑩, the second embodiment will be described with reference to FIG. 15 (b). They are arranged in the order of ①, ⑥, ②, ⑦, ③, ⑧, ④, ⑨, ⑤ and ⑩. Other configurations, operations, and effects are the same as those in the first embodiment.

The wings (40, 40,...) Of the fan bodies (30, 30,...) Arranged discontinuously are not limited to the second embodiment. . Embodiment 3 of the Invention 3—

In the third embodiment, as shown in FIG. 16, each wing (40, 40,...) Has a rivet (50,

50, ···). This rivet (50, 50,...) …) Is formed only on the pressure surface, which is the front of the wing, and extends from the inner edge (42) to the outer edge (41) of each wing (40, 40,…).

As shown in Fig. 17, the direction of the riblets (50, 50, ...) is formed so as to cross the wings (40, 40, ...) at right angles. That is, the rivets (50, 50,...) Are formed along the skeleton line of the wing (40, 40,...), And the interval between the winglets (50, 50,. ) Is narrowest at the inner edge (42) and becomes larger toward the outer edge (41). As a result, the air flow follows the riblets (50, 50,…), the pressure loss between the blades (40, 40) is reduced, and the fan efficiency is improved.

These riblets (50, 50, ...) are formed at a depth corresponding to the viscous bottom layer of the boundary layer. That is, the flow of fluid in the viscous bottom layer of the boundary layer becomes a motion of a vertical vortex, and the vertical vortex often moves as a pair. The riblets (50, 50,…) act to block lateral flow, so that a double burst, which occurs when approaching longitudinal vortex counterforce rotating in opposite directions, prematurely occurs, As the strength of the downwash decreases, its duration also decreases. As a result, the turbulent frictional resistance on the surface of the rivets (50, 50,…) is reduced.

On the back side of the wings (40, 40, ...), a fluid separation phenomenon occurs, so that the formation of riblets (50, 50, ...) increases the resistance.

Therefore, according to the third embodiment, since the rivlets (50, 50,...) Are formed only on the pressure surfaces of the wings (40, 40,...), The turbulent frictional resistance < As a result, pressure loss can be reduced, fan efficiency can be improved, and noise can be further reduced in conjunction with the twisted shape of the wings (40, 40, ...). Also, no rivets (50, 50,…) are formed on the back side of the wings (40, 40,…), so that an increase in resistance due to the fluid separation phenomenon occurring on the back surface is reliably suppressed. It is possible C Embodiment 4 of the Invention

As shown in FIGS. 18 and 19, the outdoor unit (60) of the air conditioner according to Embodiment 4 is a vertical outdoor unit, and has an air passage (7A) at the upper stage of the casing (70). ) Is formed in the lower part of the equipment storage space (7B).

The upper stage of the casing (70) has a substantially L-shaped suction port (71) extending vertically from one side surface to an adjacent side surface, and has an upper surface formed at the corner of the other side surface. A downwardly extending outlet (72) is formed with force, and the air passage (7A) is formed in the casing (70) from the inlet (71) to the outlet (72).

In the air passage (7A), a heat exchanger (61) having a substantially L-shape in a plan view and extending in the vertical direction is disposed in proximity to the suction port (71), and is disposed close to the outlet (72). While the crossflow fan (20) is arranged in force, a tongue (23) for partitioning the inside of the casing (70) into a low pressure side and a high pressure side is provided inside the casing (70). It is formed close to ,

A plurality of grills (74, 74,...) Are arranged in the outlet (72) in parallel at predetermined intervals in the vertical direction. The grilles (74, 74,...) Are inclined upward from the inside to the outside so that the AF force is upward in the air blowing direction. In other words, the above-mentioned grills (74, 74, ...) are configured so that the blown air force <upstream.

When the cross-floor fan (20) is rotated, the outdoor air is sucked into the casing (70) from the suction port (71) and exchanges heat with the refrigerant in the heat exchanger (61). It will be blown out from the outlet (72) through the fan (20).

A compressor (62) is installed in the storage space (7B), while the compressor (62) Is connected to an accumulator (63) and connected to a refrigerant circuit (not shown), and the refrigerant circuit is connected to the heat exchanger (61). The storage space (7B) stores electrical components (64) for controlling the compressor (62) and the like. The cross-flow fan (20) has the same configuration as the cross-flow fan (20) of the first embodiment shown in FIGS. 2 to 5 described above, and includes a fan body (30, 30, 30, ····) Force <Composed of multiple units in the direction of the rotation axis and arranged vertically. Each of these fan bodies (30, 30, ') is arranged in the direction of the wings (50, 50, ...) constituting a cascade between the partition plates (31, 31) on both sides. It is configured.

The fan body (30, 30,...) Is connected to, for example, six stations to form a main body (21), and a partition plate (31, 31) located on both sides of the main body (21) is provided with a rotating shaft. (22) A force is attached, and a motor (23) is connected to the upper end of the rotating shaft (22). The fan bodies (30, 30,...) Are formed in a circular cascade arranged in a plurality of blades (40, 40,...).

Furthermore, the blades (40, 40,...) Of the fan body (30, 30,...) In the above cross flow fan (20) have the air blowing direction with respect to the direction immediately before the rotation axis. The wings (40, 40, ...) are formed into twisted wings that are twisted about the axis of rotation from one side end face to the other side end face so as to incline diagonally upward.

In other words, the fan bodies (30, 30,...) Have a circular cascade in which 35 blades (40, 40,...) Are arranged in the circumferential direction, as in the first embodiment. As shown in Fig. 3, the wings (40, 40, ...) are arranged at unequal pitches with different pitch P forces. For example, the pitch P of the above wings (40, 40, ...) is 9.4. It is set as appropriate within the range of 11.1 ° to 11.1 °.

The wings (40, 40,...) Are formed into airfoil wings having a predetermined curvature from the outer edge (51) to the inner edge (52), as shown in FIG. Rim (51) and inner rim (52) is formed in a round shape of a predetermined arc.

The wings (40, 40,...) Of each fan body (30, 30,...) Are, as shown in FIG. 3 described above, from one side end face of the wings (40, 40,...). The airfoil (4S) with a cross section orthogonal to the rotation axis 0 is formed in a torsion shape that is twisted about the rotation axis 0 as it goes to the other side end surface. In other words, the wings (40, 40, ...) are twisted in a spiral around the rotation axis 0, and the air inflow angle and outflow angle It is twisted so that the angle is the same at any cross-sectional position.

The wings (40, 40,...) Of each fan body (30, 30,...) Consist of the wings (40, 40,...) Of adjacent fan bodies (30, 30). And the torsional directions of the wings (40, 40, ...) are formed in the same direction, for example, clockwise.

The torsion angle of the wings (40, 40,...) Is, for example, 50 ° or more when the torsion angle is extended from one end to the other end in the entire length of the main body (21). The wing shape force is formed so as to be 360 ° or less. For example, if the wings (40, 40,...) Of each fan body (30, 30,...) Are connected from the left end of the body (21) to the right end, the wings (40, 40, ···) is twisted.

On the other hand, since the air passing through the cross flow fan (20) blows obliquely upward with respect to the rotation axis 0, the cross flow fan (20) is installed in parallel with the air outlet (72). It is installed straight up and down. Therefore, the twist angle of the wings (40, 40, ...) and the air blowing angle, that is, the upper blowing angle with respect to the horizontal direction, are as shown in Fig. 21. In FIG. 21, when the torsion angle of the wing (40, 40,...) Is zero, it becomes a conventional straight wing parallel to the rotation axis 0, and blows air in the horizontal direction. Then, as the torsion angle of the wings (40, 40,...) Increases with the zero force, the upper blowing angle increases along the characteristic curve E. On the other hand, the relationship between the torsion angle 0 of the wings (40, 40,...) And noise is as shown in FIG. Figure 22 shows the noise level when the torsional angle S is 180 ° with the wings (40, 40,…) extended from one end to the other end of the main body (21). The value is set to zero (see Figure 22F). Further, as shown in FIGS. 23 and 24, the grille (74, 74,...) Has an inclination angle y of 25 ° with respect to the horizontal direction.

The noise increases as the torsion angle 0 becomes larger than 180 °. On the other hand, the noise increases as the torsion angle 0 becomes smaller than 180 °. That is, this twist angle 0 is 180. If the twisting angle S is smaller than 180 °, the fan performance itself will decrease and the noise will increase. If the twist angle S is smaller than 180 °, the surface of the grill (74, 74,…) will be peeled off, etc. 74, 74,…) becomes resistance and noise increases.

According to Figs. 21 and 22 above, in the outdoor unit (60), the torsion angle 0 of the blade (40, 40,…) of the cross flow fan (20) is , 40,…) are extended from one side end to the other side of the entire length of the main body (21), and it is desirable to set 180 °.

In particular, as shown in Fig. 24, the cross-flow fan (20) raises the air blowing angle so that air guidance is not required much more than before, so that the grills (74, 74,…) The length Ls can be reduced to about half the length Ls compared to the general case of Fig. 23. c As a result, air separation on the grill (74, 74,…) surface is reduced, and noise is reduced. It will be reduced. Operation of one outdoor unit

Next, the operation of the outdoor unit (60) will be described.

When the cross flow fan (20) is driven to rotate, outdoor air is sucked into the casing (70) from the suction port (71), exchanges heat with the refrigerant in the heat exchanger (61), and then flows through the air passage (7A). After that, the outdoor air passes through the cross flow fan (20) and blows out (72) is blown out of the casing (70).

At this time, the blow-off air passing through the cross flow fan (20) is blown in the direction AF because the wings (40, 40,...) Of the cross-fout opening—fan (20) are formed as twisted wings. Sloping upward. Furthermore, since the air blowing direction AF is deflected by the grilles (74, 74,...), The blown air is blown more obliquely upward and out of the casing (70).

—Effect of Embodiment 1

As described above, according to the first embodiment, the crossflow fans (20) of the twisted blades (40, 40,...) Are provided, so that the air blowing direction AF is set obliquely upward. Therefore, the amount of deflection due to the grilles (74, 74,...) Can be reduced. As a result, the pressure loss of the blown air by the grills (74, 74,...) Can be reduced, so that the fan efficiency can be improved.

Also, since the turbulence of the air flow on the surfaces of the grills (74, 74,...) Can be reduced, noise sources can be suppressed and noise can be reduced.

In addition, since the air blowing direction AF is deflected by the cross opening fan (20) and the grills (74, 74,...), A sufficient upward flow can be obtained. As a result, it is possible to reliably prevent a short circuit in which the blown air flows around the intake port (71), and to prevent the blown air from directly hitting a power person. It can be protected from obstacles such as walls that are close to the exit (72).

In addition, since the cross flow fan (20) of the twisted blades (40, 40, ...) is provided, the pressure loss of the air blown out by the grill (74, 74, ...) can be reduced. At the same time, noise can be reduced.

In addition, since the cross flow fan (20) can be installed vertically up and down, the installation space can be reduced, and the size can be reduced. Work and the like can be simplified.

Since the cross flow fan (20) is composed of twisted blades (40, 40, ...), the interference sound is generated as a sine wave having a period of the pitch of the blades (40, 40, ...). However, since the phases of the interfering sounds are shifted from each wing (40, 40,…), the interfering sounds cancel each other out, the NZ sound can be reduced, and the sound pressure level of the noise can be reduced. .

Also, the blades (40, 40,...) Of the fan bodies (30, 30,...) Are formed so that the airfoil (4S) has the same shape with respect to the rotation axis 0 at any cross-sectional position. As a result, the inflow angle and outflow angle of the air can be the same at any cross-sectional position, so that the optimal inflow angle and outflow angle can be maintained, and a decrease in performance can be reliably prevented.

In addition, the wings (40, 40,…) of each fan body (30, 30,…) have a twisted shape compared to the case where the wings (40, 40,…) are not twisted (the twist angle is zero). As a result, the chord length can be increased, and the air volume per rotation can be increased, so that the performance can be improved.

Also, since the outer edge (51) and the inner edge (52) of the wings (40, 40,...) Are arc-shaped, the fan body (a) of the conventional inclined wing shown in FIGS. In this case, the outer diameter at the center becomes smaller, while the outer diameter of the fan body (30, 30, ...) can be made equal on both sides. As a result, the peripheral speed at the center of the fan body (30, 30,...) Can be made higher than before, and the performance can be improved. In particular, by setting the torsion angle 0 of the wings (40, 40,…) of the fan body (30, 30,…) to 180 °, it is possible to ensure that the blown air can be made to be the upper stream. At the same time, the sound pressure level of the simulated noise (see Figure 9) can be minimized over almost the entire range.

In addition to the case where the twist angle 0 of the wings (40, 40,…) is set to 180 °, the case where the twist angle S of the wings (40, 40,…) is set to a range of 60 ° or more. To ensure that the air At the same time, the sound pressure level (see Fig. 9) of the simulation noise can be reduced over almost the entire range.

Also, if the twist angle of the blades (40, 40, ...) is set to 0 in the range of 120 ° to 360 °, it can be ensured that the blown air can be made into the upper stream. At the same time, the sound pressure level (see Fig. 9) obtained by superimposing the broadband noise and the NZ sound according to the simulation becomes almost flat, and the sound pressure level of the noise can be further reduced.

Also from 150 ° to 270 °. When the torsion angle of the wings (40, 40,...) Is set to 0 in the range of, the blown air can be surely made to be the upper stream, and at the same time, the broadband noise and the NZ sound by simulation are reduced. The superimposed sound pressure level (see Fig. 9) becomes almost the lowest value, and the sound pressure level of noise can be reliably reduced.

Also 60. If the torsion angle of the blades (40, 40, ...) is set to 0 in the range of 150 ° to 150 °, the blown air can be surely turned into the upward flow and the swirl flow must be considered. The sound pressure level of the noise (see Fig. 9) obtained by superimposing the broadband noise, the NZ sound, and the blowing sound is almost the lowest, and the sound pressure level of the overall noise can be reliably reduced.

Further, since the NZ sound can be reduced, the distance between the tongue (75) and the cross flow fan (20) can be set small. As a result, it is possible to increase the air volume per the same rotation speed.

—Embodiment 5—

As shown in FIG. 25, the fifth embodiment includes the cross flow fan (20) according to the fourth embodiment, while replacing the grilles (74, 74,...) With a mesh-shaped protection net (78). At the outlet (72). In other words, the airflow direction AF can be changed upward by the cross flow fan (20) itself, so that the grills (74, 74,…) are omitted. In particular, since the torsion blades (40, 40,…) are used, the deflection angle of the air blowing direction AF can be increased by increasing the torsion angle. Therefore, the grills (74, 74,…) are omitted. A protection network (78) is provided. As a result, the structure can be simplified. The other configuration and operation and effect are the same as those of the fourth embodiment. Embodiment 6 of the Invention

In the sixth embodiment, as shown in FIG. 26, the cross flow fan (20) of the fourth embodiment is provided, while the diffuser portions (77, 77) are formed in the casing (70). .

Specifically, the diffuser portions (77, 77), which are the upper wall and the lower wall of the outlet (72) in the casing (70), are formed in a shape that is inclined upward and outward toward the front. That is, it is formed in a shape that follows the air blowing direction AF.

As a result, the blown air deflected by the cross flow fan (20) flows smoothly without colliding with the upper diffuser (77), reducing pressure loss and suppressing noise. Can be achieved. The other configuration and operation and effect are the same as those of the fourth embodiment. Another embodiment of the invention

In the first to sixth embodiments, the torsional direction of the wings (30, 30,...) Is set in the clockwise direction. However, in the present invention, the torsional direction of the wings (30, 30,. May be set.

In each of the fan bodies (30, 30,...) Of the first to fourth embodiments, the twist direction of the wings (30, 30,...) Is set to the same direction. Then, the wings (30, 30, …) May be composed of two types of fan bodies (30, 30,…) with different torsional forces. For example, the torsion direction of the wings (30, 30,…) is set to the clockwise direction, and the torsion direction of the wings (30, 30,…) is set to the counterclockwise direction. The fan bodies (30, 30, ...) may be arranged alternately. As a result, the swirling flow can be suppressed.

Further, the wings (30, 30,…) of the fan body (30, 30,…) may be arranged at the same pitch, and the torsion angle of the wings (40, 40,…) ,…) Extend from one end of the main body (21) to the other end to form a twisted shape corresponding to one pitch of the wings (40, 40,…). Or the torsion angle of the wing (40, 40,…) is from the one end of the fan body (30, 30,…) to the other end, corresponding to one pitch of the wing (40, 40,…). Form into shape. As a result, the interference sound SW can be offset, and the NZ sound can be reduced. In particular, the pitch of the wings (40, 40, ...) is the same, so that performance can be improved.

Further, the wings (40, 40, ...) in each embodiment have a force formed such that the airfoil (4S) has the same shape with respect to the rotation axis 0 at any cross-sectional position. In the invention according to claim 16, the blades (40, 40,...) Of each fan body (30, 30,...) May be formed so that the blade shape (4S) at each cross-sectional position is different. The inflow angle and the outflow angle may be formed in different twist shapes. That is, the shape is twisted by a predetermined angle between the partition plates (31, 31) on both sides, and the inflow angle and the outflow angle are different between the both ends of the wing (40, 40, ...). In short, the interference powers should cancel each other out.

Further, in each of the embodiments, the air conditioner (10) has been described. However, the crossflow fan (20) according to the invention described in claims 1 to 15 can be applied to various types of blowers.

In the inventions of claims 16 to 31, the structure of the outdoor unit (60) such as the heat exchanger (61) is not limited to the embodiment. [Possibility of ± H ± for ij]

As described above, the crossflow fan of the present invention is useful for an air conditioner or the like where noise reduction is desired, and is particularly suitable for equipment where reduction of NZ sound is desired. In addition, the outdoor unit of the air conditioner of the present invention is useful when the blown air needs to be directed upward.

Claims

The scope of the claims

1. A plurality of fan bodies (30, 30,...) Consisting of a plurality of blades (40, 40,...) Extending in the rotation axis direction arranged in the circumferential direction are arranged in the rotation axis direction In the Crossfloor Fan

The wings (40, 40, ...) are formed in a twisted shape that is twisted about the rotation axis 0 as going from one side end face to the other side end face of the wings (40, 40, ...). Has been

A cross-flow fan that specializes in:

2. The cross-flow fan according to claim 1,

The wings (40, 40, ...) are twisted so that the airfoil (4S) with a cross section orthogonal to the rotation axis 0 has the same shape with respect to the rotation axis 0 at any cross-sectional position. It is formed in a twisted shape

A croissant fan who specializes in that.

3. The cross-flow fan according to claim 1 or 2,

A cross-flow fan characterized in that the wings (40, 40, ...) of each fan body (30, 30, ...) are arranged at unequal pitch.

4. In the cross flow fan according to claim 1 or 2,

Each fan body (30, 30, ...) is formed so that the wings (40, 40, ...) of adjacent fan bodies (30, 30) are continuous.

A cross-flow fan that specializes in:

5. The cross-flow fan according to claim 1 or 2, Each fan body (30, 30, '...) is formed so that the wing (40, 40, ...) force of adjacent fan bodies (30, 30) is discontinuous.

A cross flow fan characterized by the following.

6. The cross-flow fan according to claim 1 or 2,

The wings (40, 40, ...) consist of fan bodies (30, 30, ...) in which the torsional directions are formed in the same direction.

A cross flow fan characterized by the following.

7. The cross-flow fan according to claim 1 or 2,

It consists of two types of fan bodies (30, 30, ...) formed in the opposite direction of the torsional force of the wings (40, 40, ...)

A cross flow fan characterized by the following.

8. The cross-flow fan according to claim 1 or 2,

The wings (40, 40,...) Of each fan body (30, 30,...) Have a twist angle of 60 ° or more when extended from one end of the main body to the other end. A cross flow fan characterized by being formed in a twisted shape.

9. In the cross flow fan according to claim 1 or 2,

The wings (40, 40,...) Of each fan body (30, 30,...) Have a twist angle of 360 ° when extended from one end to the other end of the overall length of the main body A cross-flow fan characterized by being formed in a twisted shape.

10. The cross-flow fan according to claim 1 or 2, The wings (40, 40,…) of each fan body (30, 30,…) extend from one end to the other end of the entire length of the main body and have a twist angle of more than 120 ° and 360 °. It is formed in a twisted shape that becomes

A cross flow fan characterized by the following.

1 1. The cross mouth opening fan according to claim 1 or 2,

The wings (40, 40,…) of each fan body (30, 30,…) extend from one end to the other end of the entire length of the main body and have a twist angle of 150 ° or more and 270 °. It is formed in a twisted shape that becomes

A cross flow fan characterized by the following.

1 2. The cross-floor fan according to claim 1 or 2,

The wings (40, 40,…) of each fan body (30, 30,…) extend from one end to the other end of the total length of the main body and have a twist angle of 60 ° or more and 150 ° or less. Is formed into a twisted shape

A cross flow fan characterized by the following.

1 3. In the cross flow fan according to claim 1 or 2,

The wings (40, 40,…) in each fan body (30, 30,…) are arranged at equal pitch

A cross-flow fan that specializes in:

1 4. In the cross flow fan according to claim 13,

The wings (40, 40,…) of each fan body (30, 30,…) have a twist angle of one of the wings (40, 40,…) while extending from one end to the other end of the overall length of the main body. Twist type corresponding to pitch Is shaped like

A croissant fan who specializes in that.

1 5. The cross flow fan according to claim 13,

The wings (40, 40,...) Of each fan body (30, 30,...) Are composed of torsional angular force wings (1) from one end of the fan body (30, 30,. (40, 40, ...) is formed in a twisted shape corresponding to one pitch

A croissant fan who specializes in that.

1 6. Outdoor air inlet (71) and outlet (72) Forced casing (70) and the casing (70) from the inlet (71) to the outlet (72). A heat exchanger (61) provided in the formed air passage (7A) and arranged in close proximity to the suction port (71);

An outdoor air conditioner having at least a cross opening and a fan (20) provided in an air passage (7A) in the casing (70) and arranged vertically in close proximity to an air outlet (72). On the machine,

The cross flow fan (20) consists of a plurality of blades (40, 40,...) Extending in the direction of the axis of rotation arranged in the circumferential direction. While it is composed of multiple arrangements in the center direction,

The wings (40, 40,...) Of each of the above-mentioned fan bodies (30, 30, '·') exert an air blowing directional force against the position immediately before the rotation axis 0 of the cross flow fan (20). The wings (40, 40, ...) are formed in a twisted shape that is twisted about the rotation axis 0 as going from one side end face to the other side end face so as to incline diagonally upward.

An outdoor unit of an air conditioner, which is characterized in that:

1 7. In the outdoor unit of the air conditioner according to claim 16, The wings (40, 40,…) of the cross flow fan (20) have an airfoil with a cross section perpendicular to the rotation axis 0 (4S). Is formed into a twisted twisted shape

An outdoor unit for an air conditioner, comprising:

1 8. In the outdoor unit of the air conditioner according to claim 16 or 17,

The wings (40, 40,…) of the fan bodies (30, 30,…) of the cross flow fan (20) are arranged at an uneven pitch

An outdoor unit for an air conditioner, comprising:

1 9. The outdoor unit of the air conditioner according to claim 16 or 17,

Each fan body (30, 30, ...) of the cross flow fan (20) is formed so that the wings (40, 40, ...) of the adjacent fan bodies (30, 30) are continuous.

An outdoor unit for an air conditioner, comprising:

20. In the outdoor unit of the air conditioner according to claim 16 or 17,

Each fan body (30, 30, ...) of the cross flow fan (20) is formed so that the wings (40, 40, ...) of the adjacent fan bodies (30, 30) are in a discontinuous state.

An outdoor unit for an air conditioner, comprising:

21. The outdoor unit of an air conditioner according to claim 16 or 17,

Each of the fan bodies (30, 30,…) of the cross-floor fan (20) has the wings (40, 40,…) with the same twisting direction.

An outdoor unit for an air conditioner, comprising:

2 2. In the outdoor unit of the air conditioner according to claim 16 or 17,

The wings (40, 40,…) in each fan body (30, 30,…) of the cross flow fan (20) have a twist angle of 60 ° extending from one end of the main body to the other end. Is formed into a twisted shape

An outdoor unit for an air conditioner, comprising:

2 3. In the outdoor unit of the air conditioner according to claim 16 or 17,

The wings (40, 40,…) of the fan bodies (30, 30,…) of the cross flow fan (20) have a twist angle of 180 when extended from one end to the other end of the entire length of the main body. ° twisted shape

An outdoor unit for an air conditioner, comprising:

2 4. The outdoor unit of the air conditioner according to claim 16 or 17,

The wings (40, 40,…) of each fan body (30, 30,…) of the cross flow fan (20) have a twist angle of 360 ° while extending from one end to the other end of the entire length of the main body. ° twisted shape

An outdoor unit for an air conditioner, comprising:

2 5. The outdoor unit for an air conditioner according to claim 16 or 17,

The wings (40, 40,…) of each fan body (30, 30,…) of the cross flow fan (20) have a twist angle of 120 while extending from one end to the other end of the entire length of the main body. It is formed in a twisted shape that is above 360 ° and below 360 °

An outdoor unit for an air conditioner, comprising:

2 6. In the outdoor unit of the air conditioner according to claim 16 or 17, The wings (40, 40,…) of each fan body (30, 30,…) of the cross-flow fan (20) have a twist angle of 150 while extending from one end to the other end of the entire length of the main body. It is formed in a twisted shape that becomes more than 270 °

An outdoor unit for an air conditioner, comprising:

2 7. The outdoor unit of the air conditioner according to claim 16 or 17,

The wings (40, 40,…) of the fan bodies (30, 30,…) of the cross flow fan (20) have a twist angle of 60 ° extending from one end of the entire length of the main body to the other end. As a result, it is formed into a twisted shape that is less than 150 °

An outdoor unit of an air conditioner, which is characterized in that:

2 8. In the outdoor unit of the air conditioner according to claim 16 or 17,

An outdoor unit of an air conditioner, characterized in that the wings (40, 40,…) in each fan body (30, 30,…) of the cross-hook fan (20) are arranged at a pitch such as the force.

2 9. In the outdoor unit of the air conditioner according to claim 28,

The wings (40, 40,…) of each fan body (30, 30,…) of the cross-flow fan (20) extend from one end to the other end of the entire length of the main body, and the torsional angular force wings (40, 40,…) 40,…) is formed in a twisted shape corresponding to one pitch of

An outdoor unit for an air conditioner, comprising:

30. In the outdoor unit of the air conditioner according to claim 28,

The wings (40, 40,…) in each fan body (30, 30,…) of the cross flow fan (20) have a twist angle from one end of the fan body (30, 30,…) to the other end. Of the wings (40, 40,…) It is formed in a twisted shape corresponding to one pitch

An outdoor unit for an air conditioner, comprising:

3 1. In the outdoor unit of the air conditioner according to claim 16 or 17,

The upper wall (77) and the lower wall (77) of the air outlet (72) in the casing (70) are formed in a shape that follows the direction of the air blowing above the slope.

An outdoor unit for an air conditioner, comprising: