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WO2013018359A1 - Ventilateur à passage unique - Google Patents

Ventilateur à passage unique Download PDF

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Publication number
WO2013018359A1
WO2013018359A1 PCT/JP2012/004867 JP2012004867W WO2013018359A1 WO 2013018359 A1 WO2013018359 A1 WO 2013018359A1 JP 2012004867 W JP2012004867 W JP 2012004867W WO 2013018359 A1 WO2013018359 A1 WO 2013018359A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
protrusion
blades
once
reinforcing plate
Prior art date
Application number
PCT/JP2012/004867
Other languages
English (en)
Japanese (ja)
Inventor
木田　琢己
杉尾　孝
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to CN201280038146.4A priority Critical patent/CN103717904B/zh
Publication of WO2013018359A1 publication Critical patent/WO2013018359A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans

Definitions

  • the present invention relates to a once-through fan used in an air conditioner that performs indoor cooling or heating.
  • a once-through fan used in an indoor unit of an air conditioner as a home air conditioner is required to improve its air blowing performance (air volume, noise) in order to reduce the size and power consumption of the air conditioner. Further, there is a demand for operating the once-through fan at a higher rotational speed and further expanding the variable range of the rotational speed. For this reason, while reducing the thickness of the blades constituting the impeller of the once-through fan, the strength of the impeller itself is secured by increasing the amount of glass fiber and carbon fiber mixed into the resin material that is the blade forming material. ing.
  • FIG. 7 to 9 show the structure of the once-through fan described in Patent Document 1.
  • the once-through fan 1 includes a plurality of impellers 2, an end plate 3, and an end plate 4.
  • Each impeller 2, end plate 3, and end plate 4 are formed by resin injection molding.
  • the crossflow type fan 1 is completed by abutting each other's connection part and joining by ultrasonic welding.
  • the impeller 2 includes an annular substrate 5, a plurality of blades 6 extending from the side surface of the annular substrate 5 and arranged in a cylindrical shape, and inner end portions (inner peripheral portions) of the blades 6.
  • a ring plate 8 that connects the blades 6 to each other via a connecting portion 7 is provided, and each component is integrally injection-molded.
  • a guide convex portion 8 b having a guide surface 8 a serving as a guide when the impellers 2 are welded and joined is extended from the blade 6 and integrally formed.
  • the ring plate 8 is further displaced in the circumferential direction and expanded in the radial direction due to pressure applied during joining by ultrasonic welding. It is provided to prevent.
  • the width dimension L1 of the ring plate 8 is set to about 2 mm in order to minimize the influence on the blowing performance (air volume, noise), and the dimension L2 of the connecting portion 7 between the ring plate 8 and each blade 6 (that is, The length dimension in which the outer peripheral surface of the ring plate 8 and the inner end of the blade 6 overlap is set to about 1 mm.
  • Each blade 6 has an airfoil shape in cross section.
  • a welding convex portion 6 a is formed on one connecting portion 7 of the impeller 2 joined to each other, and a welding concave portion 6 b is disposed on the annular substrate 5 on the other side.
  • the disc-shaped end plate 3 has a boss 3a into which a motor shaft (not shown) is inserted and fixed at an axial center portion thereof, a welding concave portion 3b into which a welding convex portion 6a of each blade 6 is inserted, and an assembly.
  • a guide recess 3c serving as a time guide is formed.
  • the disc-shaped end plate 4 disposed at the other end opposite to the end plate 3 has a bearing (not shown) in which the shaft 4 a is inserted and a ring substrate 5.
  • a welding convex portion 4b inserted into the welding concave portion 5b and a guide convex portion 4c serving as a guide during assembly are formed.
  • the indoor unit 100 includes a heat exchanger 101, a once-through fan 1 serving as a blowing means, a fan casing 103, an outer box 104, a grill 105, and the like.
  • the connection method is the same as the connection method between the end plate 3 and the impeller 2 described above.
  • connection method of the end plate 4 is the same as the connection method of the end plate 3 and the impeller 2 described above.
  • the ring plate 8 is arranged on the inner peripheral side (inner side from the inner end) of each blade 6, and therefore the radial thickness dimension L3 can be freely set. Can be set to Therefore, sufficient strength of the ring plate 8 can be ensured, and the possibility that weld or whitening occurs between the blades 6 of the ring plate 8 can be reduced.
  • the once-through fan 1 is disposed in the fan casing 103 on the leeward side of the heat exchanger 101 in a state where the fan casing 103 and a predetermined back surface clearance dimension (Y2) are secured and pivotally supported. It is rotated by a motor (not shown).
  • an outdoor unit (not shown) is connected to the indoor unit 100 by piping to constitute a refrigeration cycle, and a refrigerant is supplied to the heat exchanger 101 from the outdoor unit.
  • a refrigerant is supplied to the heat exchanger 101 from the outdoor unit.
  • the ring plate 8 and the blade 6 are integrally formed by injection molding so that the ring plate 8 that connects the blades 6 to each other is connected to the inner end of the blade 6. ing.
  • a parting line that is a step is generated on the outer surface of the molded product for the purpose of punching out the mold.
  • a parting line is formed in the vicinity of the inner end of the blade 6. Specifically, a step is formed on the outer surface of the blade 6 in a cross-sectional shape perpendicular to the rotation axis of the once-through fan 1.
  • the step 15 portion is reduced, the turbulence component generated from the step 15 portion can be reduced, deterioration of the air blowing performance can be suppressed, and an increase in noise can be suppressed.
  • the conventional once-through fan is provided with a ring plate that connects the blades to each other, and the ring plate and the blades are integrally formed so that the inner end of the blade is connected to the outer peripheral surface of the ring plate.
  • the structure to be adopted is adopted. In such a structure, a step (parting line) is generated on the outer surface of the blade in order to remove the mold.
  • the object of the present invention is to solve the above-described conventional problems, and can ensure the strength of the blade and increase the diameter, and further eliminate the step on the outer surface of the blade to suppress separation due to the step, thereby improving the blowing performance.
  • An object of the present invention is to provide a once-through fan capable of suppressing deterioration and noise.
  • a cross-flow fan is a cross-flow fan including a plurality of impellers in which a plurality of blades are arranged in a cylindrical shape and connected in the axial direction.
  • An annular or disk-shaped reinforcing plate having an outer diameter smaller than the diameter of the inner end portions of the plurality of blades arranged in a shape, and a cylindrical radial inward from a part of the inner end portion of each of the blades
  • a plurality of protrusions formed so as to protrude from the blades, and the reinforcing plate is connected to the inner ends of the blades via the protrusions.
  • the protrusion and the reinforcing plate are formed integrally.
  • a once-through fan that can ensure the strength of the blade and increase the diameter, and further eliminate the step on the outer surface of the blade to suppress separation due to the step, thereby suppressing deterioration in blowing performance and noise. Can be provided.
  • FIG. 1 is an exploded cross-sectional view of a once-through fan according to Embodiment 1 of the present invention.
  • Sectional drawing which shows one impeller of the once-through type fan of Embodiment 1 AA line sectional view of the impeller of FIG. Sectional view (portion (a) of FIG. 3) showing the connection location of blades, protrusions, and reinforcing plates in the impeller of the first embodiment.
  • Sectional drawing which shows one impeller of the once-through type fan in Embodiment 2 of this invention Exploded sectional view of a conventional once-through fan
  • Internal structure diagram of indoor unit of home air conditioner using conventional once-through fan Front view of another conventional once-through fan X1-X2 sectional view of the cross-flow fan of FIG. (B) part enlarged view of the once-through fan of FIG.
  • a cross-flow fan is the cross-flow fan including a plurality of impellers in which a plurality of blades are arranged in a cylindrical shape and connected in the axial direction.
  • the impeller includes the plurality of impellers arranged in a cylindrical shape.
  • An annular or disk-shaped reinforcing plate having an outer diameter smaller than the diameter of the inner end portion of the blade, and formed so as to protrude inward in the cylindrical radial direction from a part of the inner end portion of each blade.
  • a plurality of protrusions, and the blades, the protrusions, and the reinforcement plates are connected to the inner end portions of the blades via the protrusions. It is designed to be integrally molded.
  • the outer diameter of the reinforcing plate is made smaller than the inner peripheral diameter of the blade, and a protrusion that connects the reinforcing plate and the blade is provided to ensure the strength of the blade and increase the diameter. be able to.
  • a step (parting line) that can be used for removing the mold is disposed at a portion other than the blade, for example, radially inward of the blade. It can be positioned on a protrusion or the like.
  • the protrusion is formed at the blade end in the rotational axis direction of the impeller, and the protrusion is connected to a side surface of the reinforcing plate. It is what I did.
  • the parting line generated when the blade, the protrusion, and the reinforcing plate are integrally injection-molded using a mold.
  • the blades are not formed between the inner end portion and the outer end portion of the blade.
  • the parting line is generated at the protrusion.
  • the parting line generated when the blade, the protrusion, and the reinforcing plate are integrally injection-molded using a mold can be positioned at the protrusion. It is possible to prevent a step from being formed on the surface. Therefore, turbulence due to airflow separation can be suppressed, and a decrease in air volume and an increase in noise can be suppressed.
  • the thickness of the blades and the protrusions becomes smaller toward the outer side of the cylindrical radial direction than the parting line.
  • the blades and the protrusions are formed so that the thickness of the protrusions increases as they go radially inward.
  • the thickness of the projection portion for obtaining the required strength at the connection portion between the reinforcing plate and the projection portion is secured, and the thickness is reduced at the connection portion with the inner end portion of the blade.
  • the protrusions can be connected along the outer surface of the blades. Accordingly, it is possible to increase the diameter by securing the strength of the blades, and it is possible to suppress air flow separation without forming a step or the like in the blades.
  • the blade in the cross-flow fan according to any one of the third to fifth aspects, has a smooth blade shape having no step between an inner end portion and an outer end portion.
  • the connecting portion between the inner end of the projection and the projection has a smooth surface.
  • a seventh aspect of the present invention is the cross-flow fan according to any one of the first to sixth aspects of the present invention, wherein the protruding length of the protrusion from the inner end of the blade to the cylindrical radial inward direction is the reinforcing plate.
  • the height in the rotation axis direction of the impeller at the protrusion is in the range of 1% to 15% with respect to the height in the rotation axis direction of the impeller. is there.
  • FIG. 1 is an exploded cross-sectional view of a cross-flow fan according to Embodiment 1 of the present invention.
  • FIG. 2 is a cross-sectional view showing one impeller of the once-through fan in the first embodiment.
  • 3 is a cross-sectional view taken along the line AA of the once-through fan of FIG.
  • FIG. 4 is a cross-sectional view of a main part showing a connecting portion of the blade, the protrusion, and the reinforcing plate in the impeller of the first embodiment.
  • FIG. 5 is a cross-sectional view taken along the line BB in the connecting portion of FIG.
  • the same constituent elements as those of the once-through fan in the prior art documents are denoted by the same reference numerals and description thereof is omitted.
  • the once-through fan 21 has a plurality of impellers 22 in which a plurality of blades 9 are arranged in a cylindrical shape connected in the axial direction (rotating shaft 21 x), and end plates 3 and 4 are provided at both ends. It has a configuration.
  • a disk-shaped reinforcing plate 10 is provided inside the impeller 2.
  • the outer diameter of the reinforcing plate 10 is smaller than the inner peripheral diameter of the plurality of blades 9 arranged in a cylindrical shape (that is, the diameter of the inner end portion 9a of the blade 9).
  • the side surface of the reinforcing plate 10 and the inner end portions 9 a of the plurality of blades 9 are connected via the protruding portions 11.
  • wing 9, the reinforcement board 10, and the projection part 11 are integrally shape
  • One end 9x of the blade 9 in the axial direction of the impeller 22 (the end opposite to the annular substrate 5) is radially inward from the inner end 9a of each blade 9 (direction toward the rotating shaft 21x). ) Is formed so as to protrude.
  • the protrusion 11 has a substantially triangular shape in plan view, and the protrusion length from the inner end portion 9 a of the blade 9 increases as it approaches the side surface of the reinforcing plate 10. It is formed so that the protruding length becomes smaller as it approaches the side surface of the reinforcing plate 10.
  • the reinforcing plate 10 is formed in a disc shape, and is connected to the protruding portion 11 on the side surface in the vicinity of the outer periphery thereof.
  • the outer peripheral end of the reinforcing plate 10 is located on the radially inner side of the inner end portion 9 a of the blade 9.
  • the blade 9 has a smooth wing shape having no step between the inner end portion 9a and the outer end portion 9c.
  • the protruding portion 11 formed so as to protrude inward in the radial direction from a part of the inner end portion 9a of the blade 9 has a form in which the wing shape is extended as it is.
  • the end surface of the end 9x of the blade 9 and the side surface of the reinforcing plate 10 are located at the same position in the axial direction.
  • the cross-sectional shape of the protrusion 11 that connects the reinforcing plate 10 and the inner ends 9a of the plurality of blades 9 on the plane perpendicular to the rotational axis 1x of the once-through fan 21 has a step 12 on the axial center side of the rotational axis 1x. is doing.
  • the step 12 is formed on the outer surface of the projection 11 as a parting line by an injection mold. As shown in FIGS. 4 and 5, the step 12 is formed around the outer surface of the protrusion 11 so as to extend along the outer end surface of the reinforcing plate 10.
  • the thickness (wall thickness) of the protrusion 11 and the blade 9 decreases as it goes radially outward from the step 12 of the protrusion 11, and the protrusion increases as it goes radially inward from the step 12 of the protrusion 11.
  • the blades 9 and the protrusions 11 are formed so that the thickness (wall thickness) of 11 is increased.
  • the outer diameter of the reinforcing plate 10 is made smaller than the diameter (inner peripheral diameter) of the inner end portion 9 a of the blade 9, and the protrusion 11 that connects the reinforcing plate 10 and the blade 9 is provided.
  • the diameter of the impeller 22 can be increased and integrally molded while ensuring the strength of the blade 9.
  • a parting line (that is, an outer surface of the reinforcing plate 10 that occurs on the outer surface of the reinforcing plate 10 in order to remove the mold during injection molding)
  • a step 12 can be formed in the protrusion 11. That is, in the cross-sectional shape of the protrusion 11 on the surface perpendicular to the rotation axis 1x of the cross-flow fan 21, the party is formed on the outer surface of the protrusion 10, not on the portion between the inner end 9 a and the outer end 9 c of the blade 9.
  • the step 12 can be generated in the protrusion 11 by arranging the molds so that the ing line is located.
  • the blade 9 has a smooth blade shape with no step from the inner end portion 9a to the outer end portion 9c, noise generated from the blade 9 can be reduced.
  • a step 12 is formed on the outer surface of the blade 9 by forming the step 12 on the outer surface of the projection 11 positioned radially inward from the inner end 9 a at the end 9 x of the blade 9. Compared with the case, airflow separation can be suppressed and noise can be reduced.
  • the thickness of the outer peripheral portion 11b of the protrusion 11 is gradually reduced as it goes outward in the radial direction from the step 12 of the protrusion 11, and the inside of the protrusion 11 is increased as it goes inward in the radial direction from the step 12.
  • the thickness of the peripheral portion 11a is gradually increased.
  • the reinforcing plate 10 is connected to the blades 9 via the protrusions 11 at the end portions 9x opposite to the annular substrate 5 (that is, at one end side). Is connected to the inner end 9a.
  • the once-through fan 21 according to the first embodiment can increase the diameter of the blade 9 while ensuring the strength of the blade 9, and can prevent the step 12 and the parting line from occurring in the portion of the blade 9. . Therefore, in the indoor unit of the air conditioner in which such a once-through fan 21 is incorporated, it is possible to increase the air volume to save power and to suppress an increase in noise due to airflow separation as much as possible.
  • FIG. 6 is a diagram illustrating a main part of the impeller 32 provided in the once-through fan 31 according to the second embodiment of the present invention.
  • symbol is attached
  • the protrusion length (length in the left-right direction in FIG. 6) inward in the radial direction from the inner end 9a of the blade 9 in the protrusion 13 connected to the reinforcing plate 10 is the axial direction. It forms so that it may become small gradually as it leaves
  • the axial height h (vertical length in FIG. 6) of the impeller 32 at the protrusion 13 is 1% to 15% with respect to the axial height H of the blade 9 (impeller 32).
  • the protrusion 13 is formed on the entire protrusion 13 or the protrusion 13 while ensuring sufficient strength for connecting the reinforcing plate 10 and the blade 9.
  • the occurrence of airflow separation at the step 12 is suppressed, and the turbulence at the protrusion 13 can be suppressed by airflow separation.
  • the reinforcing plate is disk-shaped has been described as an example, but the reinforcing plate may be formed in an annular shape.
  • the parting line (step 12) may be formed on the outer surface of the protrusion, and is not limited to the position where it is formed.
  • the once-through fan having the configuration according to the present invention can increase the diameter of the blade by ensuring the strength of the blade, and further, the flow in the impeller is disturbed, the air flow performance is deteriorated, and the turbulent fluid is in the room. The noise rise is sufficiently suppressed when released.
  • the air volume of the indoor unit can be increased and power saving of the air conditioner can be achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention porte sur un ventilateur à passage unique, dans lequel ventilateur une pluralité d'hélices, comprenant une pluralité de pales disposées sous une forme cylindrique, sont disposées en étant reliées dans la direction axiale. Les hélices comprennent une plaque de renfort circulaire ou en forme de disque ayant une diamètre externe inférieur au diamètre de la partie d'extrémité interne de la pluralité de pales disposées sous une forme cylindrique, et une pluralité de saillies formées de façon à faire saillie vers l'intérieur dans la direction radiale de la forme cylindrique à partir d'une partie de la partie de l'extrémité interne de chacune des pales. Les pales, les saillies et la plaque de renfort sont formées d'un seul tenant, de telle sorte que la plaque de renfort est reliée, par l'intermédiaire des saillies respectives, aux parties d'extrémité internes de chacune des pales.
PCT/JP2012/004867 2011-08-01 2012-07-31 Ventilateur à passage unique WO2013018359A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201280038146.4A CN103717904B (zh) 2011-08-01 2012-07-31 贯流式风扇

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011168102 2011-08-01
JP2011-168102 2011-08-01

Publications (1)

Publication Number Publication Date
WO2013018359A1 true WO2013018359A1 (fr) 2013-02-07

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Application Number Title Priority Date Filing Date
PCT/JP2012/004867 WO2013018359A1 (fr) 2011-08-01 2012-07-31 Ventilateur à passage unique

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JP (1) JPWO2013018359A1 (fr)
CN (1) CN103717904B (fr)
WO (1) WO2013018359A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3369935A4 (fr) * 2015-10-30 2018-11-14 Daikin Industries, Ltd. Ventilateur tangentiel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110206757A (zh) * 2019-06-28 2019-09-06 宁波奥克斯电气股份有限公司 一种贯流风叶及空调器

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Publication number Priority date Publication date Assignee Title
JPS5166210U (fr) * 1974-11-20 1976-05-25
JPS55125996U (fr) * 1979-02-27 1980-09-06
JP2002257078A (ja) * 2001-02-26 2002-09-11 Matsushita Electric Ind Co Ltd 多翼形羽根車とその製造方法

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KR0152797B1 (ko) * 1995-12-12 1998-11-02 구자홍 공기조화기의 클로스플로팬 구조
JP3695294B2 (ja) * 2000-07-19 2005-09-14 松下電器産業株式会社 クロスフローファン
JP3982375B2 (ja) * 2002-10-02 2007-09-26 松下電器産業株式会社 貫流ファン
JP2004285937A (ja) * 2003-03-24 2004-10-14 Matsushita Electric Ind Co Ltd 送風ファン
JP4507553B2 (ja) * 2003-10-23 2010-07-21 パナソニック株式会社 クロスフローファン及びクロスフローファンの製造方法
KR101436628B1 (ko) * 2007-10-23 2014-09-02 엘지전자 주식회사 횡류팬 및 공기 조화기

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Publication number Priority date Publication date Assignee Title
JPS5166210U (fr) * 1974-11-20 1976-05-25
JPS55125996U (fr) * 1979-02-27 1980-09-06
JP2002257078A (ja) * 2001-02-26 2002-09-11 Matsushita Electric Ind Co Ltd 多翼形羽根車とその製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3369935A4 (fr) * 2015-10-30 2018-11-14 Daikin Industries, Ltd. Ventilateur tangentiel
AU2016346405B2 (en) * 2015-10-30 2019-03-28 Daikin Industries, Ltd. Cross-Flow Fan
US10704554B2 (en) 2015-10-30 2020-07-07 Daikin Industries, Ltd. Cross-flow fan

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JPWO2013018359A1 (ja) 2015-03-05
CN103717904B (zh) 2016-05-18
CN103717904A (zh) 2014-04-09

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