WO2011070691A1

WO2011070691A1 - Air blowing device

Info

Publication number: WO2011070691A1
Application number: PCT/JP2010/001731
Authority: WO
Inventors: 関口幸彦; 下田裕馬
Original assignee: パナソニック株式会社
Priority date: 2009-12-07
Filing date: 2010-03-11
Publication date: 2011-06-16
Also published as: CN102648353A; EP2511533A1; JP5540674B2; JP2011117407A; CN102648353B

Abstract

In an air blowing device, a vane has a rectangular shape in which an inner side is adjacent to a motor shaft, and outer side is adjacent to an orifice on the outer periphery of the air blowing device. In the rectangular vane, a front side connecting the inner side to the outer side has, in the intermediate portion thereof, a first protrusion projecting in a rotational direction. The portions of the front side, which extend from the first protrusion to the inner side and the outer side, are gently curved in a direction opposite to the rotational direction. Further, a rear side connecting the inner side to the outer side of the vane has, in the intermediate portion thereof, a second protrusion projecting in a rotational direction. The portions of the rear side, which extend from the second protrusion to the inner side and the outer side, are gently curved in a direction opposite to the rotational direction.

Description

Blower

The present invention relates to a large air blower used for agricultural purposes.

Conventionally, the configuration of this type of blower has been as follows. That is, a cylindrical orifice, a motor provided on the central axis of the orifice, and a plurality of blades arranged at predetermined intervals on the outer periphery of the motor shaft of the motor, the blade has an inner side on the motor shaft side and an outer side. Had a rectangular shape arranged on the outer orifice side (see, for example, Patent Document 1).

The above-described problem of the blower in the conventional example is that the power consumption is large. Specifically, this type of blower device blows air to a barn, poultry house or greenhouse, and its power consumption has reached 600 W, for example.

However, the power consumption of the blower has not been regarded as a problem until now because it is indispensable for the growth of living creatures.

However, in order to suppress an increase in various production costs, a blower with low power consumption is required.

JP 2004-52709 A

The blower of the present invention includes a cylindrical orifice, a motor provided on the central axis of the orifice, and a plurality of blades arranged at a predetermined interval on the outer periphery of the motor shaft of the motor. The front side connecting the inner side and the outer side of the blade has a first protruding part in which the middle part of the front side protrudes in the rotation direction side. The blade has a shape curved from the first protruding portion toward the inner side and the outer side, and the rear side connecting the inner side and the outer side of the blade is the middle part of the rear side. It has the 2nd protrusion part protruded to the rotation direction side, and the blade | wing was comprised by the shape curved from the 2nd protrusion part to the inner side side and the outer side side on the opposite side to a rotation direction.

This makes it possible to reduce the resistance that each blade receives during rotation. As a result, the power consumption of the blower can be reduced under the condition of securing the same air volume as before.

FIG. 1 is a front view of a blower according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the blower according to the embodiment of the present invention. FIG. 3 is a front view of the mounting plate of the blower according to the embodiment of the present invention. FIG. 4 is a front view of the blades of the blower according to the embodiment of the present invention. 5 is a cross-sectional view taken along line 5-5 of FIG. FIG. 6 is a perspective view showing a method for forming blades of the blower according to the embodiment of the present invention. FIG. 7 is an enlarged front view of a main part of the blower according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same element, the same code | symbol may be attached | subjected and description may be abbreviate | omitted.

(Embodiment)
As shown in FIG. 1, a blower 100 according to the present embodiment includes a cylindrical orifice 1, a motor 3 fixed by four mounting legs 2 on the central axis of the orifice 1 shown in FIG. 2, and a motor 3. And a plurality of blades 5 arranged at predetermined intervals on the outer periphery of the motor shaft 4.

In the present embodiment, the blade 5 is attached to the attachment plate 6 provided on the outer periphery of the motor shaft 4 shown in FIG. More specifically, the attachment plate 6 includes a plurality of attachment portions 7 provided at predetermined intervals on the outer periphery thereof, and the blades 5 are attached to the attachment portions 7.

As shown in FIG. 4, the shape of the blade 5 is a substantially rectangular shape in which the inner side 5a is disposed on the motor shaft 4 side and the outer side 5b is disposed on the outer peripheral orifice 1 side. In the substantially rectangular blade 5, the front side 5 c connecting the inner side 5 a and the outer side 5 b has a first protruding portion 12 A in which the middle part of the front side 5 c protrudes in the rotation direction (arrow direction in the drawing). The first protruding portion 12A has a shape that is gently curved toward the inner side 5a side and the outer side 5b side in the opposite direction to the rotational direction. Further, in the substantially rectangular blade 5, the rear side 5d connecting the inner side 5a and the outer side 5b has a second protruding portion 12B in which the middle portion of the rear side 5d protrudes in the rotation direction side, and the second protruding portion 12B. From the side to the inner side 5a side and the outer side 5b side, it has a shape that is gently curved on the side opposite to the rotational direction. Here, the middle part of the front side 5c and the rear side 5d is a part between the central part between the inner side 5a and the outer side 5b of the blade 5 and the outer side 5b. The substantially rectangular shape is intended to include a shape in which all angles are not necessarily a right angle.

Note that the gently curved shape is, in other words, a substantially S-shape like a waveform. That is, when the blade 5 is viewed from the direction of the motor shaft 4, the portion of the front side 5c on the outer side 5b side, that is, the curved portion including the first projecting portion 12A swells and curves in the rotation direction of the blade 5, and the front side 5c The portion on the inner side 5a side of the S has a S-shape that is concave and curved in the rotational direction of the blades 5.

In the present embodiment, as shown in FIG. 4, the blade 5 has an inner side 5 b and an inner side 5 b of the front side 5 c of the blade 5 with respect to a center line 10 connecting the rotation center and the center 5 e of the blade 5. When the line 11 connecting the corner with the side 5a is translated to the center 5e, the angle θ with respect to the center line 10 is inclined by about 5 ° in the blade rotation direction.

Further, in the present embodiment, as shown in FIG. 5, the blade 5 has a front side 5c side and a rear side 5d side with respect to the center line 10 shown in FIG. 4, that is, the motor 3 side shown in FIG. It has a shape curved toward

Hereinafter, a method for forming the curved shape of the blade 5 shown in FIG. 5 will be described briefly with reference to FIG.

First, the blade 5 is placed on the lower mold 8 having the cylindrical surface shown in the right diagram of FIG. 6 along the center line 10 of the substantially rectangular blade 5 shown in the left diagram of FIG. Next, the upper die 9 is pressed from above the blades 5 placed on the lower die 8.

Thereby, the surface shape of the lower mold 8, that is, a shape curved toward the front side 5 c side and the rear side 5 d side from the center line 10 of the blade 5 shown in the left diagram of FIG. 6 is formed.

Similarly, the attachment portion 7 of the attachment plate 6 is also formed in a shape in which the front side 7a side is inclined to the motor 3 side shown in FIG. 1 or FIG. 2 rather than the rear side 7b side.

And if the blade | wing 5 is attached to the attaching part 7 which has an inclination shape, as shown in FIG. 5, the front side 5c side of the blade | wing 5 inclined toward the motor 3 side shown in FIG. 1 or FIG. 2 rather than the rear side 5d side. It is attached to the motor shaft 4 in a state.

Further, in the present embodiment, as shown in FIG. 7, in the outer side 5 b of the blade 5, the distance X between the front side 5 c side and the orifice 1 is larger than the distance Y between the rear side 5 d side and the orifice 1. is doing. As described above, the air blower as an example of the embodiment of the present invention is realized.

In the air blower configured as described above, when the motor 3 is energized and the motor shaft 4 is rotated, the blades 5 attached to the motor 3 are advanced so that the front side 5c side of the blades 5 is advanced further than the rear side 5d side. Rotates. As a result, air is blown in the direction indicated by the arrow in FIG. 2 (the direction opposite to the motor 3).

As described above, the air blower according to the present embodiment has the blade 5 having a substantially rectangular shape, and the middle portion of the front side 5c connecting the inner side 5a and the outer side 5b of the blade 5 protrudes in the rotation direction side. In addition, the middle part of the rear side 5d connecting the inner side 5a and the outer side 5b of the blade 5 has a shape protruding in the rotation direction side.

This configuration makes it possible to reduce the resistance that each blade 5 of the air blower of the present embodiment receives during rotation under the condition that the same air volume as that of the conventional air blower is secured.

Hereinafter, it will be considered that the resistance received by the blades is reduced in the blower of the present embodiment.

In the blade 5 of the present embodiment, both the front side 5c and the rear side 5d are protruded in the rotation direction side to form the first protruding portion 12A and the second protruding portion 12B. And from the 1st protrusion part 12A and the 2nd protrusion part 12B, it is set as the shape curved gently on the opposite side to the rotation direction to the inner side 5a side and the outer side 5b side. At this time, the collision and separation between the rotating blades and the air are gradually performed from the first projecting portion 12A and the second projecting portion 12B to the inner side 5a side and the outer side 5b side. Flows smoothly along. Further, the front side of the blade is inclined to the motor side rather than the rear side. At this time, since air flows in the rotational direction along the inclined shape of the blades, turbulence of air is less likely to occur. As a result, the resistance received during the rotation of each blade 5 is reduced, and it is considered that the power consumption can be reduced.

Further, the blade of the present embodiment is formed such that the distance X between the front side 5c and the orifice 1 is larger than the distance Y between the rear side 5d and the orifice 1 on the outer side 5b of the blade. Therefore, similarly to the above, the collision between the blade and the air is gradually performed. As a result, it is considered that the resistance received during the rotation of each blade 5 can be reduced, and the power consumption can be reduced.

Further, in the outer side 5b of the blade 5, the distance Y to the orifice 1 on the rear side 5d side is made smaller than the distance X to the orifice 1 on the front side 5c side, that is, the outer diameter of the blade 5 is increased. To do. Thereby, since the contact area of a blade | wing and air becomes large, it is thought that big ventilation volume can be ensured. For the reasons discussed above, it is assumed that the resistance received by the blade is reduced.

In the air blower of the present embodiment, the outer side 7c of the attachment portion 7 of the attachment plate 6 is arranged such that the first protrusion 12A in the middle of the front side 5c of the blade 5 and the second protrusion in the middle of the rear side 5d. It arrange | positions rather than 12B at the inner side 5a side of the blade | wing 5. FIG. Thereby, the effect | action and effect by the shape of the blade | wing demonstrated above are not inhibited by the attaching part 7 of the attachment board 6. FIG. As a result, an increase in power consumption of the blower can be efficiently suppressed.

Moreover, when the power consumption of the air blower which has the structure demonstrated above implement | achieves the same ventilation volume, for example, the power consumption of the air blower using the conventional simple rectangular blade needs 600W. , About 400W. That is, the power consumption can be reduced by about 200 W by the blower provided with the blade shape of the present embodiment.

As described above, according to the present embodiment, it is possible to realize a blower with low power consumption.

In the present embodiment, the blades with the front side inclined to the motor side rather than the rear side have been described as an example. However, the present invention is not limited to this, and the blades may not be particularly inclined. Thereby, the productivity of the blades can be improved and the production cost can be reduced.

In the present embodiment, the distance X between the outer edge 5b of the blade and the orifice 1 on the front side 5c side is larger than the distance Y with the orifice 1 on the rear side 5d side. Not limited to. For example, the distance X and the distance Y may be the same. Thereby, power consumption can be reduced rather than the conventional air blower.

In this embodiment, the example in which the blade is attached to the attachment plate and attached to the motor shaft of the motor has been described. However, the present invention is not limited to this. For example, the attachment plate and the blades may be manufactured as a single structure and attached to the motor shaft. Thereby, the assembly workability of the blower is improved and the production cost can be reduced. Moreover, the obstruction | occlusion by the attaching part 7 of the attachment board 6 of the effect | action and effect by the shape of a blade | wing can be avoided.

In addition, although the example in which the line 11 connecting the outer edge on the front side in the rotation direction of the blade and the corner of the inner edge is inclined by about 5 ° with respect to the center line 10 is described, it is not limited thereto. For example, it may be about 2 ° to 10 °, and can be arbitrarily designed according to the shape of the blower and the required characteristics.

The blower according to the present invention is widely used for applications in the agricultural field, for example.

DESCRIPTION OF SYMBOLS 1 Orifice 2 Mounting leg 3 Motor 4 Motor shaft 5 Blade 5a

Inner side

5b,

7c Outer side

5c,

7a Front side

5d, 7b Rear side 5e Center 6 Mounting plate 7 Mounting part 8 Lower mold 9 Upper mold 10 Center line 11 Line 12A 1st protrusion part 12B 2nd protrusion part 100 Blower

Claims

A cylindrical orifice, a motor provided on the central axis of the orifice, and a plurality of blades arranged at predetermined intervals on the outer periphery of the motor shaft of the motor,
The blade has a rectangular shape in which the inner side is disposed on the motor shaft side and the outer side is disposed on the orifice side of the outer periphery, and the front side connecting the inner side and the outer side of the blade is the front side The middle portion has a first protruding portion protruding in the rotational direction side, and the blade has a shape curved from the first protruding portion toward the inner side and the outer side toward the side opposite to the rotational direction, A rear side connecting the inner side and the outer side of the blade has a second protruding part in which a middle part of the rear side protrudes in the rotation direction side, and the inner side and the outer side from the second protruding part. The air blower having a shape in which the blades are curved toward the side opposite to the rotation direction.
The blower according to claim 1, wherein a distance between the front side and the orifice on the outer side of the blade is larger than a distance between the rear side and the orifice on the outer side of the blade.
The blower according to claim 1, wherein the rectangular blade is attached to the motor shaft such that the front side is inclined to the motor side with respect to the rear side.
The mounting plate is provided on the outer periphery of the motor shaft, a plurality of mounting portions are provided at predetermined intervals on the outer periphery of the mounting plate, and the inner side of the blade is attached to the plurality of mounting portions. Blower device.
The blower according to claim 4, wherein the outer side of the attachment portion is disposed closer to the inner side of the blade than the first protrusion and the second protrusion.