WO2017145220A1 - Turbofan and indoor unit of air conditioner employing same - Google Patents

Turbofan and indoor unit of air conditioner employing same Download PDF

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Publication number
WO2017145220A1
WO2017145220A1 PCT/JP2016/054993 JP2016054993W WO2017145220A1 WO 2017145220 A1 WO2017145220 A1 WO 2017145220A1 JP 2016054993 W JP2016054993 W JP 2016054993W WO 2017145220 A1 WO2017145220 A1 WO 2017145220A1
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Prior art keywords
wing
main
blade
main plate
main wing
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PCT/JP2016/054993
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French (fr)
Japanese (ja)
Inventor
圭介 大石
一樹 磯村
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018501410A priority Critical patent/JP6615309B2/en
Priority to PCT/JP2016/054993 priority patent/WO2017145220A1/en
Priority to CN201690000318.2U priority patent/CN207454386U/en
Publication of WO2017145220A1 publication Critical patent/WO2017145220A1/en

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    • 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
    • F04D29/30—Vanes

Definitions

  • the present invention relates to a turbo fan having three-dimensional blades and an air conditioner indoor unit using the same.
  • Patent Document 1 discloses a turbofan that has three-dimensional blades that are fitted and provided with convex portions and concave portions on two members formed on the surfaces of the blades, and the inside of the three-dimensional blade is hollowed out.
  • Patent Document 1 there is a case where a gap is generated in a split portion (seam) between two members due to centrifugal force during operation.
  • a gap is generated in the divided portion located on the shroud-side front edge of the blade, airflow flows into the gap and noise is deteriorated.
  • contact vibration is repeated at the fitting portion due to vibration of the turbofan, which becomes a noise generation source.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a turbo fan capable of reducing noise and an indoor unit of an air conditioner using the same. .
  • the turbofan according to the present invention is fixed between the main plate and the shroud, and is located on the outer peripheral side of the main plate.
  • a wing having a pressure surface and a suction surface located on the center side of the main plate, the wing having a hollow portion formed therein, extending from the center side of the main plate to the outer peripheral side, and on the pressure surface side of the main wing
  • a wing cover that is mounted and closes the hollow portion of the main wing, the main wing being on the shroud side and provided at the front edge of the main plate at the center, and a laminar flow region extending from the wind wing region to the main plate side
  • the division part of the main wing and the wing cover is provided in the laminar flow region.
  • the divided part of the main wing and the wing cover is provided in the laminar flow region, so that the gas sucked from the rotation axis direction of the main wing and the wing cover is separated from the wing. Since it becomes difficult to enter the gap between the parts, the generation of noise due to the gap between the divided parts can be suppressed.
  • FIG. 2 is a cross-sectional view showing an example of a turbo fan according to Embodiment 1 of the present invention. It is a perspective view which shows an example of the wing
  • FIG. 5 is a cross-sectional view showing a VV cross section of the blade of FIG. 4. It is sectional drawing which shows an example of the blade
  • FIG. Embodiments of a turbofan of the present invention will be described below with reference to the drawings.
  • 1 is a perspective view illustrating an example of a turbo fan according to Embodiment 1 of the present invention
  • FIG. 2 is a cross-sectional view illustrating an example of a turbo fan according to Embodiment 1 of the present invention.
  • the turbo fan 1 shown in FIGS. 1 and 2 is used, for example, in a ceiling-embedded indoor unit, and includes a main plate 2, a shroud 3, and a blade 10.
  • the main plate 2 is formed in a disc shape, and has a boss 2a connected to the rotation shaft of the motor at the center. And when the motor which is not illustrated drives, the main plate 2 rotates centering on the boss
  • the shroud 3 is formed in an annular shape (bell mouth shape), and is disposed to face the main plate 2. Further, air is sucked from the central hole of the shroud 3.
  • a plurality of blades 10 are fixed between the main plate 2 and the shroud 3, and the plurality of blades 10 are arranged at predetermined intervals in the circumferential direction of the main plate 2.
  • the blade 10 is a three-dimensional blade having a torsional shape, and a curved pressure surface 10 a is formed on the outer peripheral side of the main plate 2, and a curved suction surface 10 b is formed on the center side of the main plate 2.
  • the plurality of blades 10 When the main plate 2 rotates, the plurality of blades 10 generate an air flow from the center of the main plate 2 toward the outer peripheral side.
  • FIG. 3 is a perspective view illustrating an example of a blade in the turbo fan of FIGS. 1 and 2
  • FIG. 4 is a plan view illustrating an example of a blade in the turbo fan of FIGS. 1 and 2
  • FIG. 5 is a blade of FIG. It is sectional drawing which shows the VV cross section.
  • the blade 10 is fixed to the main plate 2 on the lower end 10d side, and is fixed to the shroud 3 on the upper end 10u side.
  • the wing 10 includes a main wing 11 and a wing cover 12, and the wing cover 12 is attached to the main wing 11.
  • the main wing 11 is a plate-like member constituting a part of the pressure surface 10a and the suction surface 10b of the wing 10, and has a shape extending from the center side of the main plate 2 to the outer peripheral side.
  • the upper end 10 u of the main wing 11 is fixed to the shroud 3 and the lower end 10 d is fixed to the main plate 2 by, for example, ultrasonic fusion.
  • An open hollow portion 11 h is formed on the pressure surface 10 a side of the main wing 11.
  • the wing cover 12 is mounted on the pressure surface 10a side of the main wing 11 to constitute a part of the pressure surface 10a, and closes the hollow portion 11h of the main wing 11.
  • the main wing 11 has a wind-cut region 10x provided on the front edge portion on the shroud 3 side and on the center side of the main plate 2, and a laminar flow region 10y extending from the wind-cut region 10x to the main plate 2 side of the pressure surface 10a.
  • the wind-cut area 10x is formed in, for example, a circular arc shape, and is an area where airflow strikes from the shroud 3 side.
  • the airflow that strikes the wind-cut area 10x flows to the positive pressure surface 10a and the negative pressure surface 10b. Among these, the airflow that has flowed toward the positive pressure surface 10a flows from the wind-cut region 10x toward the laminar flow region 10y.
  • a split portion (seam) 13 is formed on the surface between the main wing 11 and the wing cover 12. And this division part 13 is provided in the laminar flow area
  • the split portion 13 between the main wing 11 and the wing cover 12 is located in a laminar flow region 10 y where the direction of the airflow on the pressure surface 10 a of the wing 10 is substantially parallel to the surface, and the shroud 3 of the wing 10.
  • the dividing portion 13 does not exist in the wind-cut region 10x located at the front edge portion on the side. As a result, the air flow sucked from the direction of the rotation axis of the turbofan 1 is less likely to enter the gaps in the dividing portion 13.
  • the edge portion of the hollow portion 11 h of the main wing 11 is formed in a step shape so that the depth has substantially the same depth as the thickness of the wing cover 12. Accordingly, the positive pressure surface 10a constituted by the main wing 11 and the wing cover 12 is a smooth surface without unevenness.
  • a joint portion 11 a that joins and supports the outer edge of the blade cover 12 is formed at the edge portion of the hollow portion 11 h of the main wing 11. Then, the wing cover 12 is fixed in a state where the wing cover 12 is in contact with the joint portion 11 a of the main wing 11.
  • the dividing portion 13 is provided in the laminar flow region 10 y, the airflow flowing from the rotation axis direction of the main wing 11 and the wing cover 12 is in the gap between the dividing portions 13 of the wing 10. Since it becomes difficult to enter, generation
  • the main wing 11 has an edge of the hollow portion 11 h formed in a stepped shape, and the edge of the hollow portion 11 h is joined to and supported by the outer edge of the wing cover 12.
  • 11a it can suppress that the wing
  • the generation of noise due to the contact between the main wing 11 and the wing cover 12 by vibration can be suppressed.
  • FIG. FIG. 6 is a cross-sectional view showing an example of a blade of a turbofan according to Embodiment 2 of the present invention.
  • the blade cover 12 is provided with a protrusion 112 that protrudes toward the main wing 11, and the main wing 11 is provided with an insertion portion 111 into which the protrusion 112 is inserted.
  • the insertion portion 111 of the main wing 11 is provided in a concave shape at the joint portion 11a.
  • the protrusion 112 of the wing cover 12 is provided in a convex shape on the outer edge side that becomes the divided portion 13. Then, the protrusion 112 of the wing cover 12 is inserted into the insertion portion 111 of the main wing 11, whereby the wing cover 12 is positioned on the main wing 11.
  • the second embodiment by providing the protruding portion 112 on the wing cover 12 and the insertion portion 111 on the main wing 11, there is no gap between the main wing 11 and the wing cover 12 due to backlash and warpage in the divided portion 13. Then, it is possible to prevent deterioration of noise due to sliding of the main wing 11 and the wing cover 12 due to vibration. Further, by providing the insertion portion 111 in the joint portion 11a, it is possible to suppress generation of noise due to sliding of the main wing 11 and the blade cover 12 due to vibration in the joint portion 11a. Further, even in the case of the second embodiment, as in the first embodiment, since the dividing portion 13 is provided in the laminar flow region 10y, the noise of the dividing portion 13 is not managed without strict management. Occurrence can be suppressed.
  • FIG. 7 is a schematic diagram illustrating an example of a main wing of a turbofan according to Embodiment 3 of the present invention
  • FIG. 8 is a schematic diagram illustrating an example of a wing cover of the turbofan according to Embodiment 3 of the present invention.
  • main wing 211 in FIG. 7 and the wing cover 212 in FIG. 8 parts having the same configuration as the wing 10 in FIGS. 1 to 5 and the wing 110 in FIG. To do.
  • a recess 211h in which the thickness of the main wing 11 is reduced is formed in the wind cut area 10x of the main wing 211 in FIG.
  • two ribs extending in the direction of a predetermined sliding direction from the concave portion 211h to the hollow portion 11h in the wind cut region 10x are provided in order to form the meat sunk portion in the wind cut region 10x.
  • the rib functions as an insertion portion 211a that guides the protrusion 112 from sliding and moving.
  • the main wing 211 has a boss 211b provided in a position on the extension in the sliding direction in the hollow portion 11h.
  • the wing 8 has a protrusion 112 that is slid and inserted into the insertion portion 211a of the main wing 211, and a pin 212b that is inserted into the boss 211b of the main wing 211. Then, the pin 212b of the wing cover 212 is inserted into the boss 211b of the main wing 211, thereby positioning in the surface direction. Further, the protrusion 112 of the wing cover 12 is inserted into the insertion portion 211a of the main wing 11, so that the rotation of the wing cover 212 around the boss 211b is suppressed.
  • the concave portion 211h that becomes a meat sunk portion in the wind-cut region 10x, it is possible to suppress sink marks and warpage that occur when the main wing 11 is molded, and to improve moldability. it can. Further, since the insertion portion 211a is formed of a plurality of ribs, it is possible to reliably prevent the displacement of the blade cover 212 during assembly. Further, even in the case of the third embodiment, as in the first embodiment, since the dividing portion 13 is provided in the laminar flow region 10y, it is possible to control the noise without performing strict management of the gap of the dividing portion 13. Occurrence can be suppressed.
  • FIG. 9 is a cross-sectional view of an indoor unit of an air conditioner using a turbo fan according to Embodiment 4 of the present invention.
  • the indoor unit 300 in FIG. 9 is a so-called ceiling-embedded indoor unit, which is installed buried in the back side of the ceiling.
  • the indoor unit 300 is arranged on the lower surface of the main body 301, the decorative panel 302 having a suction port 302 a and a blower outlet 302 b, a heat exchanger 303 accommodated in the main body 301, and blows air to the heat exchanger 303.
  • a turbo fan 1 is provided, and a motor 304 that rotationally drives the turbo fan 1 is provided.
  • the turbo fan 1 sucks room air from the suction port 302 a and blows it to the heat exchanger 303.
  • the air heat-exchanged in the heat exchanger 303 is supplied indoors from the blower outlet 302b.
  • a low noise air conditioner by being applied to the indoor unit 300 of the air conditioner, similarly to the first to third embodiments, without performing strict size control of the gap of the divided portion 13 of the turbofan 1, A low noise air conditioner can be obtained.
  • FIG. 5 and FIG. 6 illustrate the case where the dividing portion 13 is located at the boundary between the wind-cut region 10x and the laminar flow region 10y.
  • the wind region 10x may be located away from the wind region 10x.
  • the pressure surface 10a and the suction surface 10b are illustrated as having a flat plate shape for the sake of simplicity of explanation, but may have a curved surface shape.
  • 1 turbo fan 2 main plate, 2a boss, 3 shroud, 10, 110 blade, 10a pressure surface, 10b suction surface, 10d lower end, 10u upper end, 10x wind-off region, 10y laminar flow region, 11, 211 main wing, 11a joint , 11h hollow part, 12, 212 wing cover, 13 division part, 111 insertion part, 112 protruding part, 211a insertion part, 211b boss, 211h concave part, 212b pin, 300 indoor unit, 301 main body, 302 makeup panel, 302a inlet 302b outlet, 303 heat exchanger, 304 motor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Abstract

This turbofan includes: a disk-shaped main plate which is driven in rotation; an annular shroud disposed facing the main plate; and blades which are fixed between the main plate and the shroud and which have a positive pressure surface located on the outer circumferential side of the main plate, and a negative pressure surface located on the central side of the main plate. Each blade is provided with: a main blade in the interior of which a hollow portion is formed, and which extends from the central side toward the outer circumferential side of the main plate; and a blade cover which is mounted on the positive-pressure surface side of the main blade and occludes the hollow portion of the main blade. Each main blade includes a wind cutting region which is provided on the shroud side of the main blade, in a front edge portion on the central side of the main plate, and a laminar flow region extending from the wind cutting region toward the main plate side. A dividing portion between the main blade and the blade cover is provided in the laminar flow region.

Description

ターボファン及びこれを用いた空気調和機の室内機Turbofan and air conditioner indoor unit using the same
　本発明は、３次元翼を備えたターボファン及びこれを用いた空気調和機の室内機に関するものである。 The present invention relates to a turbo fan having three-dimensional blades and an air conditioner indoor unit using the same.
　従来から、軸方向に向かってねじれながら延びる複数の３次元翼を有するターボファンが知られている。このターボファンにおいて、羽根の軽量化を図るため、従来から翼の内部を中空化することが提案されている（例えば特許文献１参照）。特許文献１には、翼の表面を成形した２つの部材にそれぞれ凸部および凹部を設けて嵌め込む三次元翼を有し、三次元翼の内部が空洞化されたターボファンが開示されている。 Conventionally, a turbofan having a plurality of three-dimensional blades extending while twisting in the axial direction is known. In this turbofan, in order to reduce the weight of the blades, it has been conventionally proposed to hollow out the inside of the blade (see, for example, Patent Document 1). Patent Document 1 discloses a turbofan that has three-dimensional blades that are fitted and provided with convex portions and concave portions on two members formed on the surfaces of the blades, and the inside of the three-dimensional blade is hollowed out. .
特開２０１４－２０６０８４号公報JP 2014-206084 A
　しかしながら、特許文献１において、運転時の遠心力により２つの部材の分割部（継ぎ目）に隙間が発生する場合がある。特に、翼のシュラウド側前縁部に位置する分割部に隙間が発生した場合、隙間内に気流が流れ込み、騒音が悪化する。また、２つの部材が嵌合のみで組み合わされている場合、ターボファンの振動により嵌合部で接触振動が繰り返され、騒音の発生源になる。 However, in Patent Document 1, there is a case where a gap is generated in a split portion (seam) between two members due to centrifugal force during operation. In particular, when a gap is generated in the divided portion located on the shroud-side front edge of the blade, airflow flows into the gap and noise is deteriorated. Further, when the two members are combined only by fitting, contact vibration is repeated at the fitting portion due to vibration of the turbofan, which becomes a noise generation source.
　本発明は、上記のような課題を解決するためになされたもので、騒音を低減することができるターボファン及びこれを用いた空気調和機の室内機を提供することを目的とするものである。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a turbo fan capable of reducing noise and an indoor unit of an air conditioner using the same. .
　本発明に係るターボファンは、回転駆動される円板状の主板と、主板に対向して配置される円環状のシュラウドと、主板とシュラウドとの間に固定され、主板の外周側に位置する正圧面と主板の中心側に位置する負圧面とを有する翼とを有し、翼は、内部に中空部が形成され、主板の中心側から外周側へ延びる主翼と、主翼の正圧面側に装着され、主翼の中空部を塞ぐ翼カバーとを備え、主翼は、シュラウド側にあり主板の中心側の前縁部に設けられた風切領域と、風切領域から主板側へ延びる層流領域とを有し、主翼と翼カバーとの分割部は、層流領域に設けられているものである。 The turbofan according to the present invention is fixed between the main plate and the shroud, and is located on the outer peripheral side of the main plate. A wing having a pressure surface and a suction surface located on the center side of the main plate, the wing having a hollow portion formed therein, extending from the center side of the main plate to the outer peripheral side, and on the pressure surface side of the main wing A wing cover that is mounted and closes the hollow portion of the main wing, the main wing being on the shroud side and provided at the front edge of the main plate at the center, and a laminar flow region extending from the wind wing region to the main plate side The division part of the main wing and the wing cover is provided in the laminar flow region.
　本発明に係るターボファンによれば、主翼と翼カバーとの分割部は、層流領域に設けられていることにより、主翼と翼カバーとの回転軸方向から吸入された気体が、翼の分割部の隙間に入りにくくなるため、分割部の隙間に起因する騒音の発生を抑制することができる。 According to the turbofan of the present invention, the divided part of the main wing and the wing cover is provided in the laminar flow region, so that the gas sucked from the rotation axis direction of the main wing and the wing cover is separated from the wing. Since it becomes difficult to enter the gap between the parts, the generation of noise due to the gap between the divided parts can be suppressed.
本発明の実施の形態１に係るターボファンの一例を示す斜視図である。It is a perspective view which shows an example of the turbo fan which concerns on Embodiment 1 of this invention. 図２は本発明の実施の形態１に係るターボファンの一例を示す断面図である。FIG. 2 is a cross-sectional view showing an example of a turbo fan according to Embodiment 1 of the present invention. 図１及び図２のターボファンにおける翼の一例を示す斜視図である。It is a perspective view which shows an example of the wing | blade in the turbo fan of FIG.1 and FIG.2. 図１及び図２のターボファンにおける翼の一例を示す平面図である。It is a top view which shows an example of the blade | wing in the turbo fan of FIG.1 and FIG.2. 図４の翼のＶ－Ｖ断面を示す断面図である。FIG. 5 is a cross-sectional view showing a VV cross section of the blade of FIG. 4. 本発明の実施の形態２に係るターボファンの翼の一例を示す断面図である。It is sectional drawing which shows an example of the blade | wing of the turbo fan which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係るターボファンの主翼の一例を示す模式図である。It is a schematic diagram which shows an example of the main wing of the turbofan which concerns on Embodiment 3 of this invention. 本発明の実施の形態３に係るターボファンの翼カバーの一例を示す模式図である。It is a schematic diagram which shows an example of the blade cover of the turbofan which concerns on Embodiment 3 of this invention. 本発明の実施の形態４に係るターボファンを用いた空気調和機の室内機の断面図である。It is sectional drawing of the indoor unit of the air conditioner using the turbo fan which concerns on Embodiment 4 of this invention.
実施の形態１．
　以下、図面を参照しながら本発明のターボファンの実施の形態について説明する。図１は、本発明の実施の形態１に係るターボファンの一例を示す斜視図、図２は本発明の実施の形態１に係るターボファンの一例を示す断面図である。図１及び図２のターボファン１は、例えば天井埋込型の室内機に用いられるものであり、主板２と、シュラウド３と、翼１０とを有する。 Embodiment 1 FIG.
Embodiments of a turbofan of the present invention will be described below with reference to the drawings. 1 is a perspective view illustrating an example of a turbo fan according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view illustrating an example of a turbo fan according to Embodiment 1 of the present invention. The turbo fan 1 shown in FIGS. 1 and 2 is used, for example, in a ceiling-embedded indoor unit, and includes a main plate 2, a shroud 3, and a blade 10.
　主板２は、円板状に形成されており、中央にはモータの回転軸に接続されるボス２ａを有する。そして、図示しないモータが駆動することにより、主板２はボス２ａを中心に回転する。シュラウド３は、円環状（ベルマウス形状）に形成されており、主板２に対向して配置される。また、シュラウド３の中央の穴から空気が吸い込まれる。 The main plate 2 is formed in a disc shape, and has a boss 2a connected to the rotation shaft of the motor at the center. And when the motor which is not illustrated drives, the main plate 2 rotates centering on the boss | hub 2a. The shroud 3 is formed in an annular shape (bell mouth shape), and is disposed to face the main plate 2. Further, air is sucked from the central hole of the shroud 3.
　翼１０は、主板２とシュラウド３との間に複数固定されており、複数の翼１０は、それぞれ主板２の周方向に所定の間隔をあけて配置されている。翼１０は、ねじり形状を有する３次元翼であって、主板２の外周側に曲面形状の正圧面１０ａが形成され、主板２の中心側に曲面形状の負圧面１０ｂが形成されている。そして、主板２が回転したとき、複数の翼１０は主板２の中心から外周側へと向かう気流を発生させる。 A plurality of blades 10 are fixed between the main plate 2 and the shroud 3, and the plurality of blades 10 are arranged at predetermined intervals in the circumferential direction of the main plate 2. The blade 10 is a three-dimensional blade having a torsional shape, and a curved pressure surface 10 a is formed on the outer peripheral side of the main plate 2, and a curved suction surface 10 b is formed on the center side of the main plate 2. When the main plate 2 rotates, the plurality of blades 10 generate an air flow from the center of the main plate 2 toward the outer peripheral side.
　図３は、図１及び図２のターボファンにおける翼の一例を示す斜視図、図４は、図１及び図２のターボファンにおける翼の一例を示す平面図、図５は、図４の翼のＶ－Ｖ断面を示す断面図である。図３から図５に示すように、翼１０は、下端１０ｄ側において主板２に固定されており、上端１０ｕ側においてシュラウド３に固定されている。この翼１０は、主翼１１と翼カバー１２とを備え、主翼１１に翼カバー１２を取り付けた構造になっている。 3 is a perspective view illustrating an example of a blade in the turbo fan of FIGS. 1 and 2, FIG. 4 is a plan view illustrating an example of a blade in the turbo fan of FIGS. 1 and 2, and FIG. 5 is a blade of FIG. It is sectional drawing which shows the VV cross section. As shown in FIGS. 3 to 5, the blade 10 is fixed to the main plate 2 on the lower end 10d side, and is fixed to the shroud 3 on the upper end 10u side. The wing 10 includes a main wing 11 and a wing cover 12, and the wing cover 12 is attached to the main wing 11.
　主翼１１は、翼１０の正圧面１０ａの一部及び負圧面１０ｂを構成する板状の部材であり、主板２の中心側から外周側へ延びる形状を有する。主翼１１は、例えば超音波融着等により、主翼１１の上端１０ｕがシュラウド３に固定され、下端１０ｄが主板２に固定される。主翼１１の正圧面１０ａ側には開口した中空部１１ｈが形成されている。翼カバー１２は、主翼１１の正圧面１０ａ側に装着されて正圧面１０ａの一部を構成しており、主翼１１の中空部１１ｈを塞いでいる。 The main wing 11 is a plate-like member constituting a part of the pressure surface 10a and the suction surface 10b of the wing 10, and has a shape extending from the center side of the main plate 2 to the outer peripheral side. In the main wing 11, the upper end 10 u of the main wing 11 is fixed to the shroud 3 and the lower end 10 d is fixed to the main plate 2 by, for example, ultrasonic fusion. An open hollow portion 11 h is formed on the pressure surface 10 a side of the main wing 11. The wing cover 12 is mounted on the pressure surface 10a side of the main wing 11 to constitute a part of the pressure surface 10a, and closes the hollow portion 11h of the main wing 11.
　主翼１１は、シュラウド３側であって主板２の中心側の前縁部に設けられた風切領域１０ｘと、風切領域１０ｘから正圧面１０ａの主板２側へ延びる層流領域１０ｙとを有する。風切領域１０ｘは、例えば円弧形状に形成されており、シュラウド３側から気流が当たる領域であり、風切領域１０ｘに当たった気流は正圧面１０ａ及び負圧面１０ｂへ流れる。このうち、正圧面１０ａ側に流れた気流は、風切領域１０ｘから層流領域１０ｙに向かって流れることになる。 The main wing 11 has a wind-cut region 10x provided on the front edge portion on the shroud 3 side and on the center side of the main plate 2, and a laminar flow region 10y extending from the wind-cut region 10x to the main plate 2 side of the pressure surface 10a. . The wind-cut area 10x is formed in, for example, a circular arc shape, and is an area where airflow strikes from the shroud 3 side. The airflow that strikes the wind-cut area 10x flows to the positive pressure surface 10a and the negative pressure surface 10b. Among these, the airflow that has flowed toward the positive pressure surface 10a flows from the wind-cut region 10x toward the laminar flow region 10y.
　ここで、主翼１１と翼カバー１２との間には、表面に分割部（継ぎ目）１３が形成される。そして、この分割部１３が層流領域１０ｙに設けられるようになっている。すなわち、主翼１１と翼カバー１２との分割部１３は、翼１０の正圧面１０ａ上の気流の方向と面の向きがほぼ並行になる層流領域１０ｙに位置しており、翼１０のシュラウド３側の前縁部に位置する風切領域１０ｘには分割部１３が存在しない。すると、ターボファン１の回転軸方向から吸入された気流が分割部１３の隙間に入りにくくなる。 Here, a split portion (seam) 13 is formed on the surface between the main wing 11 and the wing cover 12. And this division part 13 is provided in the laminar flow area | region 10y. In other words, the split portion 13 between the main wing 11 and the wing cover 12 is located in a laminar flow region 10 y where the direction of the airflow on the pressure surface 10 a of the wing 10 is substantially parallel to the surface, and the shroud 3 of the wing 10. The dividing portion 13 does not exist in the wind-cut region 10x located at the front edge portion on the side. As a result, the air flow sucked from the direction of the rotation axis of the turbofan 1 is less likely to enter the gaps in the dividing portion 13.
　さらに、主翼１１の中空部１１ｈの縁部は、深さが翼カバー１２の厚さとほぼ同一の深さを有するように、段状に形成されている。したがって、主翼１１と翼カバー１２とにより構成される正圧面１０ａは凹凸のない滑らかな面になっている。主翼１１の中空部１１ｈの縁部には、翼カバー１２の外縁を接合して支持する接合部１１ａが形成されている。すると、翼カバー１２は、主翼１１の接合部１１ａに接触した状態で固定されることになる。 Furthermore, the edge portion of the hollow portion 11 h of the main wing 11 is formed in a step shape so that the depth has substantially the same depth as the thickness of the wing cover 12. Accordingly, the positive pressure surface 10a constituted by the main wing 11 and the wing cover 12 is a smooth surface without unevenness. A joint portion 11 a that joins and supports the outer edge of the blade cover 12 is formed at the edge portion of the hollow portion 11 h of the main wing 11. Then, the wing cover 12 is fixed in a state where the wing cover 12 is in contact with the joint portion 11 a of the main wing 11.
　上記実施の形態１によれば、分割部１３が層流領域１０ｙに設けられていることにより、主翼１１と翼カバー１２との回転軸方向から流れ込む気流が、翼１０の分割部１３の隙間に入りにくくなるため、分割部１３の隙間に起因する騒音の発生を抑制することができる。すなわち、従来のように、風切領域１０ｘに分割部１３が位置する場合、気流が分割部１３の隙間に入り込み、翼１０上の流れに乱れが生じて騒音が生じる場合がある。これを防止するためには、分割部１３に隙間が生じないような寸法で各部品を製造する必要があり、製造時に分割部の隙間の厳しい寸法管理が必要になる。一方、図１～図５の翼１０において、分割部１３が層流領域１０ｙに設けられているため、分割部１３の隙間の厳しい管理を行うことなく、騒音の発生を抑制することができる。 According to the first embodiment, since the dividing portion 13 is provided in the laminar flow region 10 y, the airflow flowing from the rotation axis direction of the main wing 11 and the wing cover 12 is in the gap between the dividing portions 13 of the wing 10. Since it becomes difficult to enter, generation | occurrence | production of the noise resulting from the clearance gap between the division parts 13 can be suppressed. That is, when the dividing portion 13 is located in the wind-cut region 10x as in the conventional case, the airflow may enter the gap between the dividing portions 13 and the flow on the blade 10 may be disturbed to generate noise. In order to prevent this, it is necessary to manufacture each component with a dimension that does not cause a gap in the divided portion 13, and it is necessary to strictly manage the size of the gap in the divided portion during manufacturing. On the other hand, in the blade 10 of FIGS. 1 to 5, since the dividing portion 13 is provided in the laminar flow region 10y, the generation of noise can be suppressed without strictly managing the gap of the dividing portion 13.
　また、図５に示すように、主翼１１は、中空部１１ｈの縁部が段状に形成されており、中空部１１ｈの縁部には、翼カバー１２の外縁に接合して支持する接合部１１ａが設けられているとき、遠心力によって翼カバー１２が主翼１１の外側に移動するのを抑制することができる。その結果、気流が分割部１３の隙間に入る、もしくは翼面に沿った気流が翼カバー１２に衝突して乱れたりすることによる騒音の悪化を抑制することができる。さらに、主翼１１と翼カバー１２とが振動により接触することによる騒音の発生を抑制することができる。 Further, as shown in FIG. 5, the main wing 11 has an edge of the hollow portion 11 h formed in a stepped shape, and the edge of the hollow portion 11 h is joined to and supported by the outer edge of the wing cover 12. When 11a is provided, it can suppress that the wing | blade cover 12 moves to the outer side of the main wing | blade 11 with a centrifugal force. As a result, it is possible to suppress the deterioration of noise due to the air current entering the gap of the dividing portion 13 or the air current along the blade surface colliding with the blade cover 12 and being disturbed. Furthermore, the generation of noise due to the contact between the main wing 11 and the wing cover 12 by vibration can be suppressed.
実施の形態２．
　図６は、本発明の実施の形態２に係るターボファンの翼の一例を示す断面図である。なお、図６の翼１１０において、図５の翼１１０と同一の構成を有する部位には同一の符号を付してその説明を省略する。図６に示すように、翼カバー１２には、主翼１１側へ突出した突出部１１２が設けられており、主翼１１には、突出部１１２が挿入される挿入部１１１が設けられている。 Embodiment 2. FIG.
FIG. 6 is a cross-sectional view showing an example of a blade of a turbofan according to Embodiment 2 of the present invention. In the wing 110 of FIG. 6, parts having the same configuration as the wing 110 of FIG. 5 are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 6, the blade cover 12 is provided with a protrusion 112 that protrudes toward the main wing 11, and the main wing 11 is provided with an insertion portion 111 into which the protrusion 112 is inserted.
　具体的には、主翼１１の挿入部１１１は、接合部１１ａにおいて凹状に設けられている。翼カバー１２の突出部１１２は、分割部１３になる外縁側において凸状に設けられている。そして、翼カバー１２の突出部１１２が主翼１１の挿入部１１１に挿入されることにより、翼カバー１２が主翼１１に位置決めされる。 Specifically, the insertion portion 111 of the main wing 11 is provided in a concave shape at the joint portion 11a. The protrusion 112 of the wing cover 12 is provided in a convex shape on the outer edge side that becomes the divided portion 13. Then, the protrusion 112 of the wing cover 12 is inserted into the insertion portion 111 of the main wing 11, whereby the wing cover 12 is positioned on the main wing 11.
　上記実施の形態２によれば、翼カバー１２に突出部１１２を設け、主翼１１に挿入部１１１を設けることにより、分割部１３において、主翼１１及び翼カバー１２のガタやソリにより隙間がなくなる。すると、振動によって主翼１１と翼カバー１２が摺動することによる騒音の悪化を防ぐことができる。また、接合部１１ａに挿入部１１１が設けられることにより接合部１１ａにおいて、振動により主翼１１と翼カバー１２が摺動することによる騒音の発生を抑制することができる。さらに、実施の形態２の場合であっても、実施の形態１と同様、分割部１３が層流領域１０ｙに設けられているため、厳しい分割部１３の隙間の管理を行うことなく、騒音の発生を抑制することができる。 According to the second embodiment, by providing the protruding portion 112 on the wing cover 12 and the insertion portion 111 on the main wing 11, there is no gap between the main wing 11 and the wing cover 12 due to backlash and warpage in the divided portion 13. Then, it is possible to prevent deterioration of noise due to sliding of the main wing 11 and the wing cover 12 due to vibration. Further, by providing the insertion portion 111 in the joint portion 11a, it is possible to suppress generation of noise due to sliding of the main wing 11 and the blade cover 12 due to vibration in the joint portion 11a. Further, even in the case of the second embodiment, as in the first embodiment, since the dividing portion 13 is provided in the laminar flow region 10y, the noise of the dividing portion 13 is not managed without strict management. Occurrence can be suppressed.
実施の形態３．
　図７は、本発明の実施の形態３に係るターボファンの主翼の一例を示す模式図、図８は、本発明の実施の形態３に係るターボファンの翼カバーの一例を示す模式図である。なお、図７の主翼２１１及び図８の翼カバー２１２において、図１～図５の翼１０及び図６の翼１１０と同一の構成を有する部位には同一の符号を付してその説明を省略する。 Embodiment 3 FIG.
FIG. 7 is a schematic diagram illustrating an example of a main wing of a turbofan according to Embodiment 3 of the present invention, and FIG. 8 is a schematic diagram illustrating an example of a wing cover of the turbofan according to Embodiment 3 of the present invention. . In the main wing 211 in FIG. 7 and the wing cover 212 in FIG. 8, parts having the same configuration as the wing 10 in FIGS. 1 to 5 and the wing 110 in FIG. To do.
　図７の主翼２１１の風切領域１０ｘの内部には主翼１１の肉厚を減じた凹部２１１ｈが形成されている。風切領域１０ｘの内部に肉ヌスミ部が構成されるために、風切領域１０ｘ内の凹部２１１ｈから中空部１１ｈに向かって所定のスライド方向の向きに延びた例えば２本のリブが設けられている。このリブは、突出部１１２がスライドして移動するのをガイドする挿入部２１１ａとして機能する。また、主翼２１１は、中空部１１ｈ内であってスライド方向の延長上の位置に設けられたボス２１１ｂを有する。 A recess 211h in which the thickness of the main wing 11 is reduced is formed in the wind cut area 10x of the main wing 211 in FIG. For example, two ribs extending in the direction of a predetermined sliding direction from the concave portion 211h to the hollow portion 11h in the wind cut region 10x are provided in order to form the meat sunk portion in the wind cut region 10x. Yes. The rib functions as an insertion portion 211a that guides the protrusion 112 from sliding and moving. Further, the main wing 211 has a boss 211b provided in a position on the extension in the sliding direction in the hollow portion 11h.
　図８の翼カバー２１２は、主翼２１１の挿入部２１１ａにスライドして挿入される突出部１１２と、主翼２１１のボス２１１ｂに挿入されるピン２１２ｂとを有する。そして、主翼２１１のボス２１１ｂに翼カバー２１２のピン２１２ｂが挿入されることにより面方向の位置決めが行われる。また、翼カバー１２の突出部１１２が主翼１１の挿入部２１１ａに挿入されることにより、ボス２１１ｂを中心とした翼カバー２１２の回転が抑制される。 8 has a protrusion 112 that is slid and inserted into the insertion portion 211a of the main wing 211, and a pin 212b that is inserted into the boss 211b of the main wing 211. Then, the pin 212b of the wing cover 212 is inserted into the boss 211b of the main wing 211, thereby positioning in the surface direction. Further, the protrusion 112 of the wing cover 12 is inserted into the insertion portion 211a of the main wing 11, so that the rotation of the wing cover 212 around the boss 211b is suppressed.
　上記実施の形態３によれば、風切領域１０ｘ内に肉ヌスミ部になる凹部２１１ｈが形成されることにより、主翼１１の成形時に発生するヒケやソリを抑制し、成形性を改善することができる。また、挿入部２１１ａが複数のリブから形成されていることにより、組み立て時において翼カバー２１２の位置ズレを確実に防止することができる。また、実施の形態３の場合であっても、実施の形態１と同様、分割部１３が層流領域１０ｙに設けられているため、厳しい分割部１３の隙間の管理を行うことなく、騒音の発生を抑制することができる。 According to the third embodiment, by forming the concave portion 211h that becomes a meat sunk portion in the wind-cut region 10x, it is possible to suppress sink marks and warpage that occur when the main wing 11 is molded, and to improve moldability. it can. Further, since the insertion portion 211a is formed of a plurality of ribs, it is possible to reliably prevent the displacement of the blade cover 212 during assembly. Further, even in the case of the third embodiment, as in the first embodiment, since the dividing portion 13 is provided in the laminar flow region 10y, it is possible to control the noise without performing strict management of the gap of the dividing portion 13. Occurrence can be suppressed.
実施の形態４．
　図９は、本発明の実施の形態４に係るターボファンを用いた空気調和機の室内機の断面図である。図９において、同一の構成を有する部位には同一の符号を付してその説明を省略する。図９の室内機３００は、いわゆる天井埋込型の室内機であり、天井の裏側に埋没して設置されるものである。 Embodiment 4 FIG.
FIG. 9 is a cross-sectional view of an indoor unit of an air conditioner using a turbo fan according to Embodiment 4 of the present invention. In FIG. 9, parts having the same configuration are denoted by the same reference numerals and description thereof is omitted. The indoor unit 300 in FIG. 9 is a so-called ceiling-embedded indoor unit, which is installed buried in the back side of the ceiling.
　室内機３００は、本体３０１と、本体３０１の下面に配置され、吸込口３０２ａ及び吹出口３０２ｂを有する化粧パネル３０２と、本体３０１に収容された熱交換器３０３と、熱交換器３０３に送風を行うターボファン１と、ターボファン１を回転駆動するモータ３０４とを有する。そして、ターボファン１は、吸込口３０２ａから室内空気を吸い込み、熱交換器３０３へ送風する。熱交換器３０３において熱交換された空気は、吹出口３０２ｂから室内へ供給される。 The indoor unit 300 is arranged on the lower surface of the main body 301, the decorative panel 302 having a suction port 302 a and a blower outlet 302 b, a heat exchanger 303 accommodated in the main body 301, and blows air to the heat exchanger 303. A turbo fan 1 is provided, and a motor 304 that rotationally drives the turbo fan 1 is provided. The turbo fan 1 sucks room air from the suction port 302 a and blows it to the heat exchanger 303. The air heat-exchanged in the heat exchanger 303 is supplied indoors from the blower outlet 302b.
　上記実施の形態４のように、空気調和機の室内機３００に適用されることにより、実施の形態１～３と同様、ターボファン１の分割部１３の隙間の厳しい寸法管理を行うことなく、低騒音の空気調和機を得ることができる。 As in the fourth embodiment, by being applied to the indoor unit 300 of the air conditioner, similarly to the first to third embodiments, without performing strict size control of the gap of the divided portion 13 of the turbofan 1, A low noise air conditioner can be obtained.
　本発明の実施の形態は、上記実施の形態１～４に限定されず、種々の変更を行うことができる。たとえば、図５及び図６において、分割部１３が、風切領域１０ｘと層流領域１０ｙとの境界に位置している場合について例示しているが、この場合に限らず、層流領域１０ｙのうち風切領域１０ｘとは離れた部位に位置していてもよい。また、図５及び図６において、正圧面１０ａ及び負圧面１０ｂは、説明を簡略化するために平板形状を有する場合について例示しているが、曲面形状を有していてもよい。 The embodiment of the present invention is not limited to the above-described Embodiments 1 to 4, and various changes can be made. For example, FIG. 5 and FIG. 6 illustrate the case where the dividing portion 13 is located at the boundary between the wind-cut region 10x and the laminar flow region 10y. Of these, the wind region 10x may be located away from the wind region 10x. 5 and 6, the pressure surface 10a and the suction surface 10b are illustrated as having a flat plate shape for the sake of simplicity of explanation, but may have a curved surface shape.
　１　ターボファン、２　主板、２ａ　ボス、３　シュラウド、１０、１１０　翼、１０ａ　正圧面、１０ｂ　負圧面、１０ｄ　下端、１０ｕ　上端、１０ｘ　風切領域、１０ｙ　層流領域、１１、２１１　主翼、１１ａ　接合部、１１ｈ　中空部、１２、２１２　翼カバー、１３　分割部、１１１　挿入部、１１２　突出部、２１１ａ　挿入部、２１１ｂ　ボス、２１１ｈ　凹部、２１２ｂ　ピン、３００　室内機、３０１　本体、３０２　化粧パネル、３０２ａ　吸込口、３０２ｂ　吹出口、３０３　熱交換器、３０４　モータ。 1 turbo fan, 2 main plate, 2a boss, 3 shroud, 10, 110 blade, 10a pressure surface, 10b suction surface, 10d lower end, 10u upper end, 10x wind-off region, 10y laminar flow region, 11, 211 main wing, 11a joint , 11h hollow part, 12, 212 wing cover, 13 division part, 111 insertion part, 112 protruding part, 211a insertion part, 211b boss, 211h concave part, 212b pin, 300 indoor unit, 301 main body, 302 makeup panel, 302a inlet 302b outlet, 303 heat exchanger, 304 motor.

Claims (7)

  1. 　回転駆動される円板状の主板と、
    　前記主板に対向して配置される円環状のシュラウドと、
    　前記主板と前記シュラウドとの間に固定され、前記主板の外周側に位置する正圧面と前記主板の中心側に位置する負圧面とを有する翼と
    　を有し、
    　前記翼は、
    　内部に中空部が形成され、前記主板の中心側から外周側へ延びる主翼と、
    　前記主翼の前記正圧面側に装着され、前記主翼の前記中空部を塞ぐ翼カバーと
    　を備え、
    　前記主翼は、前記シュラウド側にあり前記主板の中心側の前縁部に設けられた風切領域と、前記風切領域から前記主板側へ延びる層流領域とを有し、
    　前記主翼と前記翼カバーとの分割部は、前記層流領域に設けられているターボファン。     A disk-shaped main plate that is driven to rotate;
    An annular shroud disposed opposite the main plate;
    A wing fixed between the main plate and the shroud and having a pressure surface located on the outer peripheral side of the main plate and a suction surface located on the center side of the main plate;
    The wing
    A hollow portion is formed inside, and a main wing extending from the center side to the outer peripheral side of the main plate,
    A wing cover attached to the pressure surface side of the main wing and closing the hollow portion of the main wing, and
    The main wing has a wind cut area provided on a front edge portion on the shroud side and on the center side of the main plate, and a laminar flow area extending from the wind cut area to the main plate side,
    The division | segmentation part of the said main wing and the said wing | blade cover is a turbofan provided in the said laminar flow area | region.
  2. 　前記主翼は、前記中空部の縁部が段状に形成されており、
    　前記中空部の縁部には、前記翼カバーの外縁に接合して支持する接合部が設けられている請求項１に記載のターボファン。     In the main wing, the edge of the hollow portion is formed in a step shape,
    The turbofan according to claim 1, wherein a joint portion that joins and supports an outer edge of the blade cover is provided at an edge portion of the hollow portion.
  3. 　前記翼カバーは、前記分割部側において前記主翼へ向かって突出した突出部を有し、
    　前記主翼は、前記突出部を挿入する挿入部を有する請求項１又は２に記載のターボファン。     The wing cover has a protruding portion protruding toward the main wing on the divided portion side,
    The turbofan according to claim 1, wherein the main wing has an insertion portion into which the protruding portion is inserted.
  4. 　前記主翼の前記風切領域内に肉ヌスミ部が構成され、
    　前記挿入部は、前記主翼の前記風切領域から前記中空部に向かって延びたリブからなり、
    　前記挿入部は、前記突出部の移動をガイドするものである請求項３に記載のターボファン。     A meat meat portion is configured in the wind-cut region of the main wing,
    The insertion part is composed of a rib extending from the wind cut area of the main wing toward the hollow part,
    The turbo fan according to claim 3, wherein the insertion portion guides movement of the protrusion.
  5. 　前記翼カバーは、前記中空部内に設けられたピンを有し、
    　前記主翼は、前記ピンを固定するボスを有する請求項１～４のいずれか１項に記載のターボファン。     The wing cover has a pin provided in the hollow portion,
    The turbofan according to any one of claims 1 to 4, wherein the main wing has a boss for fixing the pin.
  6. 　前記翼は、ねじれ形状を有する３次元翼である請求項１～５のいずれか１項に記載のターボファン。 The turbofan according to any one of claims 1 to 5, wherein the blade is a three-dimensional blade having a twisted shape.
  7. 　請求項１～６のいずれか１項に記載のターボファンを用いた空気調和機の室内機。 An indoor unit of an air conditioner using the turbo fan according to any one of claims 1 to 6.
PCT/JP2016/054993 2016-02-22 2016-02-22 Turbofan and indoor unit of air conditioner employing same WO2017145220A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2018501410A JP6615309B2 (en) 2016-02-22 2016-02-22 Turbofan and air conditioner indoor unit using the same
PCT/JP2016/054993 WO2017145220A1 (en) 2016-02-22 2016-02-22 Turbofan and indoor unit of air conditioner employing same
CN201690000318.2U CN207454386U (en) 2016-02-22 2016-02-22 Turbofan and used the turbofan air conditioner indoor unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/054993 WO2017145220A1 (en) 2016-02-22 2016-02-22 Turbofan and indoor unit of air conditioner employing same

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735199A (en) * 1980-08-13 1982-02-25 Hitachi Ltd Fan impeller
JPS6441696U (en) * 1987-09-07 1989-03-13
WO2005052377A1 (en) * 2003-11-27 2005-06-09 Daikin Industries, Ltd. Blade wheel for centrifugal blower and centerifugal blower with the same
JP2008002379A (en) * 2006-06-23 2008-01-10 Daikin Ind Ltd Centrifugal fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735199A (en) * 1980-08-13 1982-02-25 Hitachi Ltd Fan impeller
JPS6441696U (en) * 1987-09-07 1989-03-13
WO2005052377A1 (en) * 2003-11-27 2005-06-09 Daikin Industries, Ltd. Blade wheel for centrifugal blower and centerifugal blower with the same
JP2008002379A (en) * 2006-06-23 2008-01-10 Daikin Ind Ltd Centrifugal fan

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CN207454386U (en) 2018-06-05
JP6615309B2 (en) 2019-12-04

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