JPH10246200A - Impeller for axial blower - Google Patents

Impeller for axial blower

Info

Publication number
JPH10246200A
JPH10246200A JP9047675A JP4767597A JPH10246200A JP H10246200 A JPH10246200 A JP H10246200A JP 9047675 A JP9047675 A JP 9047675A JP 4767597 A JP4767597 A JP 4767597A JP H10246200 A JPH10246200 A JP H10246200A
Authority
JP
Japan
Prior art keywords
blade
impeller
blades
recesses
axial blower
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP9047675A
Other languages
Japanese (ja)
Inventor
Masafumi Yamamoto
雅史 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP9047675A priority Critical patent/JPH10246200A/en
Publication of JPH10246200A publication Critical patent/JPH10246200A/en
Pending legal-status Critical Current

Links

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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/306—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the suction side of a rotor blade

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To attain lightening of weight and reduction of a cost, without deteriorating durability and performance as a blade. SOLUTION: In an impeller for an axial blower constituted of an almost cylindrical hub and a plurality of blades 2, 2... protrusively provided in the periphery of the hub by an integrally molded product of synthetic resin, each blade 2 is formed in blade type shape having thickness in a section, also in this blade surface, many recessed parts 3, 3... in size capable of leaving air accumulated at rotation time are formed, weight of the blade 2 is markedly reduced, also so that a surface shape enveloping an outer end of the recessed parts 3, 3... can be ensured.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本願発明は、合成樹脂の一体
成形品からなる軸流送風機用羽根車に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impeller for an axial blower, which is made of a synthetic resin.

【０００２】[0002]

【従来の技術】一般に、空気調和機用（例えば、室外機
用）として用いられる軸流送風機において、設計点以外
の運転領域で運転すると、羽根面において空気流れの剥
離が発生し、その結果空力性能の低下、送風音の増大と
いう問題が発生する。このような問題を有する送風機に
おける大きな課題として、運転中に発生する羽根面での
空気流れの剥離を抑制することが挙げられる。2. Description of the Related Art Generally, when an axial blower used for an air conditioner (for example, an outdoor unit) is operated in an operation region other than a design point, air flow separation occurs on a blade surface, and as a result, aerodynamics is caused. Problems such as a decrease in performance and an increase in blowing noise occur. As a major problem in the blower having such a problem, suppression of separation of the air flow on the blade surface generated during operation can be cited.

【０００３】上記課題を解決する方法として、図６に示
すように、羽根２′を断面に厚みのある翼型形状とする
方法が従来から採用されてきている。このような羽根形
状とすると、羽根２′への流入角が変化したとしても、
羽根面での空気流れの剥離が生じにくくなり、空力性能
の低下、送風音の増大という課題を解決することが可能
となる。As a method for solving the above-mentioned problem, a method of forming a blade 2 'into a blade-like shape having a thick cross section as shown in FIG. 6 has conventionally been adopted. With such a blade shape, even if the inflow angle to the blade 2 'changes,
Separation of the air flow on the blade surface is less likely to occur, and it is possible to solve the problems of reduced aerodynamic performance and increased blowing noise.

【０００４】ところが、上記のような羽根形状を採用す
ると、たとえ合成樹脂により成形したとしても、羽根の
重量が大きくならざるを得なくなり、高速回転時に羽根
２′の付け根の強度が遠心力に耐え得なくなるという不
具合が生ずる。また、樹脂成形時における材料コストも
高くなる。However, if the blade shape as described above is adopted, even if it is made of a synthetic resin, the weight of the blade must be increased, and the strength of the root of the blade 2 'withstands centrifugal force during high-speed rotation. There is a problem that it cannot be obtained. Further, the material cost during resin molding also increases.

【０００５】上記のような不具合に対処するものとし
て、羽根の一面側を抉って薄肉化するとともに、抉った
部分にリブを介して蓋を取り付けた構成のものが提案さ
れている（例えば、特開平６−２６４８９８号公報参
照）。[0005] To cope with the above-mentioned problems, there has been proposed a configuration in which one side of the blade is hollowed to reduce the thickness and a cover is attached to the hollowed portion via a rib (for example, Japanese Patent Application Laid-Open No. H11-157556). See JP-A-6-264898).

【０００６】[0006]

【発明が解決しようとする課題】ところが、上記公知例
のような構造とした場合、羽根における抉った部分に水
が侵入した場合、水を完全に排出することが難しい。す
ると、内部で水が凍結したりした場合、体積膨張により
羽根が破損してしまうおそれがある。However, in the case of such a structure as in the above-mentioned known example, it is difficult to completely discharge water when water enters the hollowed portion of the blade. Then, if water freezes inside, the blades may be damaged due to volume expansion.

【０００７】本願発明は、上記の点に鑑みてなされたも
ので、羽根としての耐久性および性能を損なう事なく、
軽量化および低コスト化を図ることを目的とするもので
ある。[0007] The present invention has been made in view of the above points, without impairing the durability and performance as a blade.
It is intended to reduce the weight and cost.

【０００８】[0008]

【課題を解決するための手段】本願発明の基本構成で
は、上記課題を解決するための手段として、略円筒状の
ハブ１と、該ハブ１の外周に突設された複数の羽根２，
２・・とを合成樹脂の一体成形品により構成してなる軸
流送風機用羽根車において、前記各羽根２を、断面に厚
みのある翼型形状となすとともに、その羽根面に、回転
時において空気を溜め置くことが可能な大きさの多数の
凹部３，３・・を形成している。In the basic structure of the present invention, as a means for solving the above-mentioned problems, a substantially cylindrical hub 1 and a plurality of blades 2 protruding from the outer periphery of the hub 1 are provided.
In the impeller for an axial flow blower, which is constituted by an integrally molded product of a synthetic resin, each of the blades 2 is formed into an airfoil shape having a thick cross-section, A large number of recesses 3, 3,... Having a size capable of storing air are formed.

【０００９】上記のように構成したことにより、羽根２
の重量が大幅に軽減されるとともに、凹部３，３・・の
外端を包絡する面形状が確保できるところから、高強度
化および低コスト化を図ることができるとともに、翼型
形状の羽根２としての空力性能および騒音低下性能を確
保することができる。しかも、凹部３，３・・内に水が
侵入したとしても、開放状態とされているので完全に排
出することができるため、凍結等に起因して羽根２が破
損するということはなくなる。With the above-described configuration, the blade 2
The weight of the blade 2 can be greatly reduced, and the surface shape enclosing the outer ends of the concave portions 3, 3,... Can be secured, so that high strength and low cost can be achieved, and the wing-shaped blade 2 Aerodynamic performance and noise reduction performance can be ensured. In addition, even if water enters the recesses 3, 3,..., The blades 2 can be completely discharged because they are in the open state, so that the blades 2 do not break due to freezing or the like.

【００１０】本願発明の基本構成において、前記凹部
３，３・・を、断面六角形形状を有するもの、あるいは
断面四角形形状を有するもの、もしくは断面円形形状を
有するものとなす場合がある。In the basic structure of the present invention, the recesses 3, 3,... May have a hexagonal cross section, a quadrangular cross section, or a circular cross section.

【００１１】[0011]

【発明の実施の形態】以下、添付の図面を参照して、本
願発明の好適な実施の形態について詳述する。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

【００１２】この軸流送風機用羽根車は、図１に示すよ
うに、略円筒状のハブ１と、該ハブ１の外周に突設され
た複数の羽根２，２，２とを合成樹脂の一体成形品によ
り構成してなるものであり、前記各羽根２は、断面に厚
みのある翼型形状とされている（図３参照）。As shown in FIG. 1, the impeller for an axial blower includes a substantially cylindrical hub 1 and a plurality of blades 2, 2, 2 protruding from the outer periphery of the hub 1 made of synthetic resin. Each of the blades 2 has an airfoil shape having a thick cross section (see FIG. 3).

【００１３】前記各羽根２の一面（例えば、負圧面２
ａ）には、図２および図３に示すように、回転時におい
て空気を溜め置くことが可能な大きさの多数の凹部３，
３・・が形成されている。One surface of each of the blades 2 (for example, a suction surface 2)
2A and 3A, as shown in FIGS. 2 and 3, a large number of concave portions 3 having a size capable of storing air during rotation.
3 ... are formed.

【００１４】前記凹部３，３・・は、基本的には回転時
において空気を溜め置くことが可能な大きさのものであ
れば形状はどのようなものでもよいが、例えば断面六角
形形状（即ち、ハニカム形状）を有するもの（図２参
照）、あるいは断面四角形形状（即ち、格子形状）を有
するもの（図４参照）、もしくは断面円形形状を有する
もの（図５参照）とすることができる。なお、羽根２の
負圧面２ａにおいて前縁部４、外周縁部５、後縁部６お
よび内周縁部７には、所定幅の凹部が形成されない部分
を残すこととされている。特に、前縁部４および外周縁
部５に凹部が形成されない部分を残すことは、流入する
空気流れが多方向からとなる可能性があることに対処で
きるようにするためである。The recesses 3, 3,... Basically have any shape as long as they can store air during rotation. For example, the recesses 3, 3,. That is, it can have a honeycomb shape (see FIG. 2), a rectangular cross-sectional shape (ie, lattice shape) (see FIG. 4), or a circular cross-sectional shape (see FIG. 5). . In the negative pressure surface 2 a of the blade 2, the front edge portion 4, the outer peripheral edge portion 5, the rear edge portion 6, and the inner peripheral edge portion 7 are left with a portion where a concave portion having a predetermined width is not formed. In particular, leaving a portion where no concave portion is formed in the front edge portion 4 and the outer peripheral edge portion 5 is to cope with a possibility that the inflowing air flow may be from multiple directions.

【００１５】上記のように構成したことにより、羽根２
の重量が大幅に軽減されるとともに、凹部３，３・・の
外端を包絡する面形状が確保できるところから、高強度
化および低コスト化を図ることができるとともに、翼型
形状の羽根２としての空力性能および騒音低下性能を確
保することができる。しかも、凹部３，３・・内に水が
侵入したとしても、開放状態とされているので完全に排
出することができるため、凍結等に起因して羽根２が破
損するということはなくなる。With the above-described structure, the blade 2
The weight of the blade 2 can be greatly reduced, and the surface shape enclosing the outer ends of the concave portions 3, 3,... Can be secured, so that high strength and low cost can be achieved, and the wing-shaped blade 2 Aerodynamic performance and noise reduction performance can be ensured. In addition, even if water enters the recesses 3, 3,..., The blades 2 can be completely discharged because they are in the open state, so that the blades 2 do not break due to freezing or the like.

【００１６】なお、上記実施の形態においては、羽根２
の負圧面２ａに凹部３，３・・を形成するようにしてい
るが、羽根２の圧力面２ｂ（図２参照）に凹部３，３・
・を形成するようにしてもよいし、負圧面２ａおよび圧
力面２ｂの両方に凹部３，３・・を形成してもよいこと
は勿論である。In the above embodiment, the blade 2
Are formed on the negative pressure surface 2a of the blade 2, but are formed on the pressure surface 2b of the blade 2 (see FIG. 2).
Of course, or of course, the concave portions 3, 3... May be formed in both the suction surface 2a and the pressure surface 2b.

【００１７】[0017]

【発明の効果】本願発明によれば、略円筒状のハブ１
と、該ハブ１の外周に突設された複数の羽根２，２，２
とを合成樹脂の一体成形品により構成してなる軸流送風
機用羽根車において、前記各羽根２を、断面に厚みのあ
る翼型形状となすとともに、その羽根面に、回転時にお
いて空気を溜め置くことが可能な大きさの多数の凹部
３，３・・を形成して、羽根２の重量を大幅に軽減する
とともに、凹部３，３・・の外端を包絡する面形状を確
保できるようにしたので、高強度化および低コスト化を
図ることができるとともに、翼型形状の羽根２としての
空力性能および騒音低下性能を確保することができると
いう優れた効果がある。According to the present invention, a substantially cylindrical hub 1 is provided.
And a plurality of blades 2, 2, 2 protruding from the outer periphery of the hub 1.
In the impeller for an axial flow blower, which is constituted by an integrally molded product of a synthetic resin, each of the blades 2 has a blade-shaped shape having a thick section, and air is stored on the blade surface during rotation. By forming a large number of recesses 3, 3... Of a size that can be placed, the weight of the blade 2 can be greatly reduced, and a surface shape enclosing the outer ends of the recesses 3, 3. Therefore, there is an excellent effect that the strength and the cost can be reduced, and the aerodynamic performance and the noise reduction performance of the blade-shaped blade 2 can be secured.

【００１８】しかも、凹部３，３・・内に水が侵入した
としても、開放状態とされているので完全に排出するこ
とができるため、凍結等に起因して羽根２が破損すると
いうことはなくなる。Moreover, even if water enters the recesses 3, 3,..., The blades 2 can be completely drained because they are in the open state, so that the blades 2 are not damaged due to freezing or the like. Disappears.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本願発明の実施の形態にかかる軸流送風機用羽
根車の正面図である。FIG. 1 is a front view of an impeller for an axial blower according to an embodiment of the present invention.

【図２】本願発明の実施の形態にかかる軸流送風機用羽
根車の一例を示す要部拡大正面図である。FIG. 2 is an enlarged front view of an essential part showing an example of an impeller for an axial blower according to an embodiment of the present invention.

【図３】本願発明の実施の形態にかかる軸流送風機用羽
根車における羽根の断面図である。FIG. 3 is a cross-sectional view of a blade in an axial blower impeller according to an embodiment of the present invention.

【図４】本願発明の実施の形態にかかる軸流送風機用羽
根車の他の例を示す要部拡大正面図である。FIG. 4 is an enlarged front view of an essential part showing another example of the impeller for an axial blower according to the embodiment of the present invention.

【図５】本願発明の実施の形態にかかる軸流送風機用羽
根車の他のもう一つの例を示す要部拡大正面図である。FIG. 5 is an enlarged front view of a main part showing another example of the impeller for an axial blower according to the embodiment of the present invention.

【図６】従来公知の軸流送風機用羽根車における羽根の
断面図である。FIG. 6 is a sectional view of a blade in a conventionally known axial-flow fan impeller.

【符号の説明】[Explanation of symbols]

１はハブ、２は羽根、２ａは負圧面、２ｂは圧力面、３
は凹部。1 is a hub, 2 is a blade, 2a is a suction surface, 2b is a pressure surface, 3
Is a recess.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 略円筒状のハブ（１）と、該ハブ（１）
の外周に突設された複数の羽根（２），（２）・・とを
合成樹脂の一体成形品により構成してなる軸流送風機用
羽根車であって、前記各羽根（２）を、断面に厚みのあ
る翼型形状となすとともに、その羽根面には、回転時に
おいて空気を溜め置くことが可能な大きさの多数の凹部
（３），（３）・・を形成したことを特徴とする軸流送
風機用羽根車。1. A substantially cylindrical hub (1), and the hub (1)
, A plurality of blades (2) protruding from the outer periphery of the axial flow blower are formed of an integrally molded product of a synthetic resin, wherein each of the blades (2) is: It features a thick airfoil shape in cross section, and a large number of recesses (3), (3),... That are large enough to hold air during rotation when formed on the blade surface. Impeller for an axial blower. 【請求項２】 前記凹部（３），（３）・・を、断面六
角形形状を有するものとなしたことを特徴とする前記請
求項１記載の軸流送風機用羽根車。2. The impeller for an axial blower according to claim 1, wherein said recesses (3) have a hexagonal cross section. 【請求項３】 前記凹部（３），（３）・・を、断面四
角形形状を有するものとなしたことを特徴とする前記請
求項１記載の軸流送風機用羽根車。3. The impeller for an axial blower according to claim 1, wherein the recesses (3) have a rectangular cross section. 【請求項４】 前記凹部（３），（３）・・を、断面円
形形状を有するものとなしたことを特徴とする前記請求
項１記載の軸流送風機用羽根車。4. The impeller for an axial blower according to claim 1, wherein the recesses (3) have a circular cross section.
JP9047675A 1997-03-03 1997-03-03 Impeller for axial blower Pending JPH10246200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9047675A JPH10246200A (en) 1997-03-03 1997-03-03 Impeller for axial blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9047675A JPH10246200A (en) 1997-03-03 1997-03-03 Impeller for axial blower

Publications (1)

Publication Number Publication Date
JPH10246200A true JPH10246200A (en) 1998-09-14

Family

ID=12781859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9047675A Pending JPH10246200A (en) 1997-03-03 1997-03-03 Impeller for axial blower

Country Status (1)

Country Link
JP (1) JPH10246200A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000052182A (en) * 1999-01-30 2000-08-16 윤종용 Fan assembly
WO2006078083A2 (en) * 2005-01-24 2006-07-27 Lg Electronics Inc. Air conditioner
JP2010209797A (en) * 2009-03-10 2010-09-24 Daikin Ind Ltd Cross-flow fan, and air conditioner including the same
WO2019030868A1 (en) * 2017-08-09 2019-02-14 三菱電機株式会社 Propeller fan, blower device, and refrigeration cycle device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000052182A (en) * 1999-01-30 2000-08-16 윤종용 Fan assembly
WO2006078083A2 (en) * 2005-01-24 2006-07-27 Lg Electronics Inc. Air conditioner
WO2006078083A3 (en) * 2005-01-24 2007-03-08 Lg Electronics Inc Air conditioner
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JPWO2019030868A1 (en) * 2017-08-09 2020-03-19 三菱電機株式会社 Propeller fan, blower and refrigeration cycle device
CN110945251A (en) * 2017-08-09 2020-03-31 三菱电机株式会社 Propeller fan, blower, and refrigeration cycle device
EP3667097A4 (en) * 2017-08-09 2021-01-20 Mitsubishi Electric Corporation Propeller fan, blower device, and refrigeration cycle device
AU2017427466B2 (en) * 2017-08-09 2021-01-28 Mitsubishi Electric Corporation Propeller fan, air-sending device, and refrigeration cycle device
CN113431805A (en) * 2017-08-09 2021-09-24 三菱电机株式会社 Propeller fan, blower, and refrigeration cycle device
CN110945251B (en) * 2017-08-09 2021-10-29 三菱电机株式会社 Propeller fan, blower, and refrigeration cycle device
US11434924B2 (en) 2017-08-09 2022-09-06 Mitsubishi Electric Corporation Propeller fan, air-sending device, and refrigeration cycle device
US11788547B2 (en) 2017-08-09 2023-10-17 Mitsubishi Electric Corporation Propeller fan, air-sending device, and refrigeration cycle device
CN113431805B (en) * 2017-08-09 2023-11-24 三菱电机株式会社 Propeller fan, blower, and refrigeration cycle device

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