JPH09303828A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH09303828A JPH09303828A JP12323896A JP12323896A JPH09303828A JP H09303828 A JPH09303828 A JP H09303828A JP 12323896 A JP12323896 A JP 12323896A JP 12323896 A JP12323896 A JP 12323896A JP H09303828 A JPH09303828 A JP H09303828A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- grill
- air conditioner
- sound
- whole
- 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.)
- Withdrawn
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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気調和機に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner.
【０００２】[0002]
【従来の技術】図４は従来の空気調和機の室外機の縦断
面図、図５は図４のＶ部（前面グリル）の拡大図であ
る。図に示すように熱交換器１と外装板２で囲まれた空
間にプロペラファン３とこのプロペラファンを駆動する
ためのモータ４が収納されている。プロペラファン３の
羽根外縁周囲にはファン前後の静圧上昇を保持するため
のリング状ベルマウス５が設けられている。モータ４は
モータ支持桁８によって、外装板２に固定されている。
このような構造において、モータ４に直結されたプロペ
ラファン３の回転により、熱交換器１の外部から空気を
吸込み、吹出し口６を通してグリル７から外部へ吐出さ
れる。グリル７の目的は第一にはファンなどの回転体に
触れないように安全上設けられている。第二としては美
観上から設けられている。グリル７の材質は高分子材料
でできていることが多く、外装板２より少し間隔をおい
た平行な平面上に格子状をなして配置されている。格子
桟９の断面形状は図５（Ｖ部拡大図）に示すように長方
形若しくは長円形である。又、特開平５−２４８６６２
には環状鋼線で構成した吐出グリルの一部に他より線径
の細いものを使用し線径の細いもののみ規則的に波形形
状に形成したものが開示されている。2. Description of the Related Art FIG. 4 is a vertical sectional view of an outdoor unit of a conventional air conditioner, and FIG. 5 is an enlarged view of a V portion (front grille) of FIG. As shown in the figure, a propeller fan 3 and a motor 4 for driving this propeller fan are housed in a space surrounded by the heat exchanger 1 and the exterior plate 2. A ring-shaped bell mouth 5 is provided around the outer edge of the blade of the propeller fan 3 to keep the static pressure increase before and after the fan. The motor 4 is fixed to the exterior plate 2 by a motor support girder 8.
In such a structure, the rotation of the propeller fan 3 directly connected to the motor 4 sucks air from the outside of the heat exchanger 1 and discharges it from the grill 7 through the outlet 6 to the outside. The purpose of the grill 7 is, first, for safety reasons so as not to touch a rotating body such as a fan. Secondly, it is provided from an aesthetic point of view. The material of the grill 7 is often made of a polymer material, and the grill 7 is arranged in a grid pattern on parallel planes that are slightly spaced from the exterior plate 2. The cross-sectional shape of the lattice bar 9 is a rectangle or an oval as shown in FIG. In addition, JP-A-5-248662
Discloses a part of a discharge grill composed of an annular steel wire, which has a smaller wire diameter than others, and is formed in a regular corrugated shape only for the thin wire diameter.
【０００３】[0003]
【発明が解決しようとする課題】旋回するプロペラファ
ンから吐出する空気の流れは半径方向に拡散する旋回流
を形成するが上記のような格子状グリルでは旋回流の主
流に対する格子桟の迎え角が大きくなり、且つ格子断面
形状が長円若しくは長方形のため流れの剥離が生じやす
い。従って、プロペラファン３から吐出される空気の流
れとの干渉音や剥離音が高くなり、室外機全体としての
騒音レベルを高くするという問題を有していた。The flow of air discharged from a swirling propeller fan forms a swirling flow that diffuses in the radial direction. In the above grid grill, the angle of attack of the lattice bars with respect to the main flow of the swirling flow is large. As the cross section of the grid becomes large and the shape of the cross section is oval or rectangular, flow separation easily occurs. Therefore, there is a problem that interference noise with the flow of air discharged from the propeller fan 3 and peeling noise are increased, and the noise level of the entire outdoor unit is increased.
【０００４】又、特開平５−２４８６６２号の技術は空
気抵抗を低下させるためにその一部に線径の細いものを
使用し、この際の強度上の問題を解決すべく線径の細い
ものに対してのみ規則的に波形形状としたものであり必
ずしも騒音を低下させるためのものではない。Further, in the technique of Japanese Patent Laid-Open No. 5-248662, a wire having a small wire diameter is used for a part thereof in order to reduce the air resistance, and a wire having a small wire diameter is used in order to solve the problem of strength at this time. However, it is not necessarily for reducing the noise because it has a regular corrugated shape.
【０００５】本発明は上記従来例の課題を解決するもの
で、前述の干渉音および剥離音を極力おさえ室外機全体
としての騒音レベルを下げることを目的とする。The present invention is intended to solve the above-mentioned problems of the prior art, and it is an object of the present invention to suppress the above-mentioned interference noise and peeling noise as much as possible and reduce the noise level of the outdoor unit as a whole.
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
したものであって、空調ユニットのプロペラファンの空
気吹き出し口にグリルが設置してある空気調和機におい
て、次の特徴を有するものである。 （１） 前記グリルを、空気流の方向に１５度以上の角
度で折り曲げてジグザグ状に形成したワイヤを用いて構
成した。 （２） 前記（１）項に記載の空気調和機において、ジ
グザグ状ワイヤを同心円状に複数条配設し、放射状に配
設したワイヤで連結してグリルを構成した。 （３） 前記（１）項に記載の空気調和機において、ジ
グザグ状ワイヤを格子状に組んでグリルを構成した。SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems and has the following characteristics in an air conditioner in which a grill is installed in the air outlet of a propeller fan of an air conditioning unit. is there. (1) The grill is configured by using a wire that is bent in the direction of the air flow at an angle of 15 degrees or more to form a zigzag shape. (2) In the air conditioner according to the item (1), a plurality of zigzag wires are concentrically arranged, and the wires are arranged radially to form a grill. (3) In the air conditioner according to the item (1), the grill is configured by assembling the zigzag wires in a grid pattern.
【０００７】[0007]
【発明の実施の形態】図１は本発明の実施の第１形態に
係る空気調和機の室外機の前面グリルの正面図、図２は
同グリルの部分断面図である。この前面グリルは、図に
示すように、プロペラファンの中心に当たるところに中
心部材１ａを配置し、これを中心にして同心円状に図２
に示すようにジグザグ状に折り曲げたワイヤ１ｃを配置
し、ワイヤ１ｂを中心部材１ａから放射状に配置し、ワ
イヤ１ｂと１ｃを固着しグリル全体を一体に構成してあ
る。折り曲げワイヤは全体に使用してもよく、またワイ
ヤ１ｂ若しくは１ｃのみに部分的に使用してもよい。1 is a front view of a front grill of an outdoor unit for an air conditioner according to a first embodiment of the present invention, and FIG. 2 is a partial sectional view of the grill. As shown in the figure, the front grill has a central member 1a arranged at a position corresponding to the center of the propeller fan, and is concentrically formed around the central member 1a.
The wire 1c bent in a zigzag shape is arranged, the wires 1b are arranged radially from the central member 1a, and the wires 1b and 1c are fixed to each other so that the entire grill is integrally formed. The folding wire may be used entirely or only partially on the wire 1b or 1c.
【０００８】図３は本発明の実施の第２形態に係る空気
調和機の室外機の前面グリルの正面図であり、格子状に
組んだグリルの場合を示す。折り曲げワイヤ３ａ，３ｂ
を交差させて構成し各々を固着し、周囲を枠３ｃで構成
し、前記３ａ，３ｂを同枠に固定しグリル全体を一体的
に構成する。この場合も図１と同様折り曲げワイヤを全
体に使用してもよく部分的に使用してもよい。FIG. 3 is a front view of the front grill of the outdoor unit of the air conditioner according to the second embodiment of the present invention, showing the case of a grill assembled in a grid pattern. Bending wires 3a, 3b
Are crossed with each other and fixed to each other, the periphery is constituted by a frame 3c, and the above-mentioned 3a and 3b are fixed to the same frame to integrally configure the entire grill. Also in this case, the bending wire may be used wholly or partially as in FIG.
【０００９】本発明は格子状グリルを、折り曲げ角度θ
が１５°以上であるワイヤを用いて構成し、ワイヤに衝
突する気流の主流方向に直交する断面より、気流方向に
ワイヤの軸芯が１５°以上傾斜するよう組み立てる。こ
れにより、ワイヤ後流に生ずる干渉渦の発生周期が長く
なるため発生音のピークレベルが低下し、この結果グリ
ルで生じる気流の干渉音及び剥離音を下げることができ
る。According to the present invention, the grid grill is bent at a bending angle θ.
Is made up of 15 ° or more, and the wire is assembled so that the axial center of the wire is inclined by 15 ° or more in the airflow direction from the cross section orthogonal to the mainstream direction of the airflow colliding with the wire. As a result, the generation period of the interference vortex generated in the wake of the wire becomes longer, so that the peak level of the generated sound decreases, and as a result, the interference sound and the separation sound of the air flow generated in the grill can be reduced.
【００１０】上記の現象の物理的説明については下記参
考図書に傾斜円柱からの放射音の問題として記述されて
いる。円柱から発生する放射音は円柱後流のカルマン渦
がもとになっているといわれている。カルマン渦の発生
の最も大きな要因は円柱前方の主流速度であるが、傾斜
円柱の場合、軸に直角な速度成分が渦放出に大きく寄与
している事がわかっている。直径１０mmの円柱を用いた
実験結果によると、傾斜角度が５〜１５°に増加すると
発生音のピークレベルが急激に低下し１５°以上ではほ
ぼ横ばいとなる。円柱の傾斜角度が増加すると軸直角の
速度成分が小さくなりこのために円柱後流の渦発生の周
期が長くなりまた渦のスケールも小さくなることから円
柱における発生音のレベルが低下する。本発明は、上記
の原理は他の直径の円柱あるいは小径の針金にも適用可
能との類推から、ワイヤの傾斜角度を１５°以上とし
た。なお上記各実施形態においては空気調和機の室外機
を例として述べたが、室内機にも適用可能である。参考
図書：静粛工学、梅沢清彦編著、開発社出版。A physical explanation of the above phenomenon is given in the following reference book as a problem of sound radiated from an inclined cylinder. It is said that the radiation sound generated from the cylinder is based on the Karman vortex behind the cylinder. The main cause of the Karman vortex generation is the main flow velocity in front of the cylinder, but in the case of the inclined cylinder, it is known that the velocity component perpendicular to the axis contributes greatly to the vortex shedding. According to the results of experiments using a cylinder having a diameter of 10 mm, the peak level of the generated sound drops sharply when the tilt angle increases from 5 to 15 °, and becomes almost flat above 15 °. When the tilt angle of the cylinder increases, the velocity component at right angles to the axis becomes smaller, so that the cycle of vortex generation in the wake of the cylinder becomes longer and the scale of the vortex becomes smaller, so the level of sound generated in the cylinder decreases. According to the analogy that the present invention can be applied to a cylinder having another diameter or a wire having a small diameter, the present invention sets the wire inclination angle to 15 ° or more. Although the outdoor unit of the air conditioner has been described as an example in each of the above-described embodiments, the present invention is also applicable to an indoor unit. Reference books: Quiet engineering, edited by Kiyohiko Umezawa, published by Development Company.
【００１１】[0011]
【発明の効果】本発明の空気調和機においては、グリル
を、空気流の方向に１５度以上の角度で折り曲げてジグ
ザグ状に形成したワイヤを用いて構成したことにより、
ワイヤ後流に生じる干渉渦の発生頻度とスケールを減ず
ることができ、この結果プロペラファンから吐出される
空気の流れとの干渉音および剥離音を従来グリルより低
く抑えることができる。また、折り曲げワイヤは市販品
として大量にしかも安価に入手できるのでグリルの製造
コストも安くすることができる。In the air conditioner of the present invention, the grill is constructed by using the wire formed in the zigzag shape by bending it at an angle of 15 degrees or more in the direction of the air flow.
It is possible to reduce the occurrence frequency and scale of the interference vortex generated in the wake of the wire, and as a result, it is possible to suppress the interference noise with the air flow discharged from the propeller fan and the separation noise to be lower than those of the conventional grill. Further, since the bending wire can be obtained as a commercial product in a large amount at a low cost, the manufacturing cost of the grill can be reduced.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施の第１形態に係る空気調和機室外
機の前面グリルの正面図。FIG. 1 is a front view of a front grill of an air conditioner outdoor unit according to a first embodiment of the present invention.
【図２】同グリルの部分断面図。FIG. 2 is a partial sectional view of the grill.
【図３】本発明の実施の第２形態に係る空気調和機室外
機の前面グリルの正面図。FIG. 3 is a front view of a front grill of the air conditioner outdoor unit according to the second embodiment of the present invention.
【図４】従来の空気調和機の室外機の縦断面図。FIG. 4 is a vertical cross-sectional view of an outdoor unit of a conventional air conditioner.
【図５】図４のＶ部の拡大図。5 is an enlarged view of a V portion of FIG.
１ 熱交換器 ２ 外装板 ３ プロペラファン ４ モータ ５ ベルマウス ６ 吹出し口 ７ グリル ８ モータ支持桁 ９ 格子桟 １ａ 中心部材 １ｂ 放射状ワイヤ １ｃ 環状ワイヤ ３ａ 水平ワイヤ ３ｂ 垂直ワイヤ ３ｃ 枠 1 Heat Exchanger 2 Exterior Plate 3 Propeller Fan 4 Motor 5 Bell Mouth 6 Outlet 7 Grill 8 Motor Support Girder 9 Lattice Bar 1a Center Member 1b Radial Wire 1c Annular Wire 3a Horizontal Wire 3b Vertical Wire 3c Frame
Claims (3)
き出し口にグリルが設置してある空気調和機において、
前記グリルを、空気流の方向に１５度以上の角度で折り
曲げてジグザグ状に形成したワイヤを用いて構成したこ
とを特徴とする空気調和機。1. An air conditioner having a grill installed at an air outlet of a propeller fan of an air conditioning unit,
An air conditioner characterized in that the grill is configured by using a wire that is bent in the direction of the air flow at an angle of 15 degrees or more to form a zigzag shape.
条配設し、放射状に配設したワイヤで連結してグリルを
構成したことを特徴とする請求項１に記載の空気調和
機。2. The air conditioner according to claim 1, wherein a plurality of zigzag-shaped wires are concentrically arranged and connected by radially arranged wires to form a grill.
グリルを構成したことを特徴とする請求項１に記載の空
気調和機。3. The air conditioner according to claim 1, wherein the zigzag wires are assembled into a grid to form a grill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12323896A JPH09303828A (en) | 1996-05-17 | 1996-05-17 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12323896A JPH09303828A (en) | 1996-05-17 | 1996-05-17 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09303828A true JPH09303828A (en) | 1997-11-28 |
Family
ID=14855624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12323896A Withdrawn JPH09303828A (en) | 1996-05-17 | 1996-05-17 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09303828A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331459A1 (en) * | 2002-01-24 | 2003-07-30 | Carrier Corporation | Reduced noise grill |
| CN100455946C (en) * | 2003-10-30 | 2009-01-28 | 乐金电子(天津)电器有限公司 | Heat exchanger constituted with spiral superfine pipeline branches |
| CN103486089A (en) * | 2012-06-08 | 2014-01-01 | Ulvac机工株式会社 | Fan cover and pumping device |
| KR101489508B1 (en) * | 2008-03-06 | 2015-02-03 | 엘지전자 주식회사 | Fan grill for outdoor unit |
| CN107184146A (en) * | 2017-06-26 | 2017-09-22 | 美的集团股份有限公司 | Dust catcher |
-
1996
- 1996-05-17 JP JP12323896A patent/JPH09303828A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331459A1 (en) * | 2002-01-24 | 2003-07-30 | Carrier Corporation | Reduced noise grill |
| CN100455946C (en) * | 2003-10-30 | 2009-01-28 | 乐金电子(天津)电器有限公司 | Heat exchanger constituted with spiral superfine pipeline branches |
| KR101489508B1 (en) * | 2008-03-06 | 2015-02-03 | 엘지전자 주식회사 | Fan grill for outdoor unit |
| CN103486089A (en) * | 2012-06-08 | 2014-01-01 | Ulvac机工株式会社 | Fan cover and pumping device |
| CN103486089B (en) * | 2012-06-08 | 2016-06-29 | Ulvac机工株式会社 | Fan guard and pump installation |
| CN107184146A (en) * | 2017-06-26 | 2017-09-22 | 美的集团股份有限公司 | Dust catcher |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030805 |