JPH03255829A - Outdoor device for air conditioner - Google Patents
Outdoor device for air conditionerInfo
- Publication number
- JPH03255829A JPH03255829A JP5365290A JP5365290A JPH03255829A JP H03255829 A JPH03255829 A JP H03255829A JP 5365290 A JP5365290 A JP 5365290A JP 5365290 A JP5365290 A JP 5365290A JP H03255829 A JPH03255829 A JP H03255829A
- Authority
- JP
- Japan
- Prior art keywords
- fan
- heat exchanger
- bell mouth
- unit
- shroud
- 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.)
- Granted
Links
- 238000007664 blowing Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Other Air-Conditioning Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、空気調和機用室外ユニットに係り、とくに低
騒音で、高効率熱交換に好適な空気調和機用室外ユニッ
トに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an outdoor unit for an air conditioner, and particularly to an outdoor unit for an air conditioner that is low in noise and suitable for highly efficient heat exchange.
従来の空気調和用室外ユニットは、たとえば実開昭５９
−８４３７３号公報に記載されているように天板と底抜
との間で、円周方向に、複数個の熱交換器を備え、該複
数個の熱交換器の中心位置でかつ直交する方向にファン
を備え、該ファンの周囲に上記天板を下方に向って直角
方向に折り曲げたベルマウスを備えたものが提案されて
いる。The conventional outdoor unit for air conditioning is, for example,
- As described in Publication No. 84373, a plurality of heat exchangers are provided in the circumferential direction between the top plate and the bottom plate, and the direction is perpendicular to the center position of the plurality of heat exchangers. It has been proposed to include a fan and a bell mouth surrounding the fan by bending the top plate downward at right angles.
上記従来技術は、ベルマウス先端部とファン下端部間の
距離が、ファン外円周上に沿って一定となるように構成
しである。一方室外ユニット内には、圧縮機等可動部や
電装品の収納スペースを必要とするので、ユニット外側
面の一部のみしか、熱交換器の通風面として使用できな
い。The above conventional technology is configured such that the distance between the bell mouth tip and the fan lower end is constant along the outer circumference of the fan. On the other hand, the outdoor unit requires storage space for movable parts such as a compressor and electrical components, so only a portion of the outer surface of the unit can be used as a ventilation surface for the heat exchanger.
前記熱交換器内通過風速の大きさは、原理的に円周方向
に異なる。たとえば、ユニット上面からみて反時計方向
にファンを回転させると、回転下流側の熱交換器要素の
通過風速は、回転上流側の熱交換器要素の通過風速に比
べて小さくなる。これは、冷却風は全てユニット外測面
吸気口から吸入され、各熱交換器要素を通過しファン内
に吸入されるのでファン入口直前ではほぼファン回転方
向と等しい方向で吸引する力が働らく。The magnitude of the wind speed passing through the heat exchanger differs in principle in the circumferential direction. For example, when the fan is rotated counterclockwise when viewed from the top of the unit, the wind speed passing through the heat exchanger element on the downstream side of the rotation becomes smaller than the wind speed passing through the heat exchanger element on the upstream side of the rotation. This is because all of the cooling air is taken in from the intake port on the outside of the unit, passes through each heat exchanger element, and is drawn into the fan, so there is no suction force acting just in front of the fan inlet in the same direction as the fan rotation direction. .
上流側では、この力の方向とユニット吸気口からファン
への吸込方向が一致するので、上流側熱交換器要素内を
通過する風速は、増加するが、方下流側では、吸引力の
方向とユニット吸気口からファンへの吸込方向は、逆と
なり、ファン出口直後の流れが、ファン−ベルマウス間
の間隙を通ってファン吸込側に戻すじゆんかん流が発生
し、結果的に回転下流側熱交換器要素内を通る風速が小
さくなる。On the upstream side, the direction of this force coincides with the direction of suction from the unit inlet to the fan, so the wind speed passing through the upstream heat exchanger element increases, but on the downstream side, the direction of the suction force coincides with the direction of the suction force. The suction direction from the unit intake port to the fan is reversed, and the flow immediately after the fan exit passes through the gap between the fan and the bell mouth and returns to the fan suction side, resulting in a flow on the downstream side of the rotation. The wind speed through the heat exchanger element is reduced.
ところでファン負荷の主要な抵抗である熱交換器の通風
抵抗は、熱交換器内のもつとも速度の速い部位で決定さ
れることから、この風速分布の不均一性は、ファン負荷
の増大を招く。騒音は、ファン負荷の２乗にほぼ比例す
るから、この結果、ファン騒音が大きくなるという問題
があった。さらにこの不均一性は、熱交換器各要素間の
熱交換量の不均一性につながり、室外ユニット内熱交換
器全体の効率低下をまねくという問題があった。By the way, the ventilation resistance of the heat exchanger, which is the main resistance of the fan load, is determined by the portion of the heat exchanger where the speed is highest, and therefore, this non-uniformity of the wind speed distribution causes an increase in the fan load. Since the noise is approximately proportional to the square of the fan load, there is a problem in that the fan noise becomes large as a result. Furthermore, this non-uniformity leads to non-uniformity in the amount of heat exchanged between each element of the heat exchanger, resulting in a problem of lowering the efficiency of the entire outdoor unit heat exchanger.
本発明の目的は、空気調和用室外ユニットに設けられた
熱交換器の全表面積を均等に有効利用し、熱交換性能の
増加とファン負荷の低減によるファン騒音の低減を可能
とする空気調和機用ファン装置を提供することにある。An object of the present invention is to provide an air conditioner that makes effective use of the entire surface area of a heat exchanger installed in an outdoor unit for air conditioning, thereby increasing heat exchange performance and reducing fan noise by reducing fan load. The purpose of the present invention is to provide a fan device for
上記目的を達成するために、本発明の空気調和用室外ユ
ニットにおいては、空気吹出口を形成するシュラウドの
先端部に、ファン外周面と所定の間隙を有するように、
ファン風案内用凸部形状のベルマウスを設け、このベル
マウス先端でかつ上端部とファン下端部間の距離が円周
方向に異なるようにファン送風装置を構成したものであ
る。In order to achieve the above object, in the air conditioning outdoor unit of the present invention, the tip of the shroud forming the air outlet has a predetermined gap with the outer peripheral surface of the fan.
A bell mouth having a convex shape for guiding fan wind is provided, and the fan blower is configured such that the distance between the top end of the bell mouth and the bottom end of the fan differs in the circumferential direction.
また上記距離が、熱交換器にほぼ面したファン外周上で
は、ファン回転方向に沿って漸次小さくなるように構成
し、他方、他のファン外周上では、ファン回転方向に沿
って漸次大きくなるようにファン送風装置を構成したも
のである。Further, the above-mentioned distance is configured so that it gradually becomes smaller along the fan rotation direction on the outer periphery of the fan that almost faces the heat exchanger, while it gradually increases along the fan rotation direction on the other fan outer peripheries. A fan blower is configured.
またベルマウスの先端部は、円周方向に、ファン下端部
とファン上端面間に配設するように構成したものである
。Further, the tip of the bell mouth is disposed in the circumferential direction between the lower end of the fan and the upper end surface of the fan.
またシュラウド筒部内端部の円孤状ベルマウスの底部に
水抜き穴を設はシュラウド、ベルマウスを一体成形にて
形成されたものである。In addition, the shroud and bell mouth are integrally molded, and a drain hole is provided at the bottom of the arc-shaped bell mouth at the inner end of the shroud cylinder.
またユニット吸込面に対向した熱交換器の一方をファン
回転方向に沿って延長するように熱交換器を構成したも
のである。Further, the heat exchanger is configured such that one side of the heat exchanger facing the unit suction surface extends along the fan rotation direction.
本発明は、ファン風の案内用ベルマウスの先端で上端部
とファン下端部間距離が、ファン外周方向に異なるよう
にしている。ところでファン送風装置では、風の吐出口
を形成しているシュラウドの先端に凸状のベルマウスを
設けているが、この凸部に相対する熱交換器要素は、ベ
ルマウスによって密閉されるかまたは、熱交換器要素と
ベルマウスの間隙はきわめて小さいので、この要素内を
通風する風速がきわめて小さくなり、結果的にこの要素
は、熱交換器として機能しない。そこで、風速の大きさ
にほぼ反比例するように円周方向にベルマウス上端部と
ファン下端部間の距離を変化させると、この距離に応じ
て、各熱交換器要素の実効伝熱面積が変化するので、熱
交換器の通過風速を均一化することが可能となる。In the present invention, the distance between the upper end and the lower end of the fan at the tip of the bell mouth for guiding the fan wind is made different in the direction of the outer circumference of the fan. By the way, in a fan blower, a convex bell mouth is provided at the tip of the shroud that forms the air outlet, and the heat exchanger element facing this convex part is either sealed by the bell mouth or Since the gap between the heat exchanger element and the bell mouth is very small, the air velocity passing through this element is very small and as a result the element does not function as a heat exchanger. Therefore, by changing the distance between the upper end of the bell mouth and the lower end of the fan in the circumferential direction so as to be approximately inversely proportional to the magnitude of the wind speed, the effective heat transfer area of each heat exchanger element changes according to this distance. Therefore, it becomes possible to equalize the wind speed passing through the heat exchanger.
さらにこのベルマウス先端でかつ上端部とファン下端部
間の距離が、熱交換器にほぼ面したファン外周上ではフ
ァン回転方向に沿って、漸次小さくなるように構成し、
他方、他のファン外周上ではファン回転方向に沿って漸
次大きくなるように構成したので、前記距離がファン外
円周上に一定である場合に比べて、熱交換器にほぼ面し
たファン外周上では、回転方向に沿って有効熱交換器面
積が漸次広くなるようになり、熱交換器各要素内通過風
速が漸次小さくなり、風速の均一化が実現する。一方熱
交換器にほぼ面していないファン外周上では、回転方向
に沿って有効熱交換器面積が漸次狭くなるようになるの
で、熱交換器各要素内通過風速は、漸次大きくなり、風
速が均一化する。Further, the distance between the top end of the bell mouth and the bottom end of the fan is configured to gradually become smaller along the fan rotation direction on the outer periphery of the fan that substantially faces the heat exchanger;
On the other hand, since the distance on the other fan outer circumferences is configured to gradually increase along the fan rotation direction, the distance on the fan outer circumference almost facing the heat exchanger is larger than the case where the distance is constant on the fan outer circumference. In this case, the effective heat exchanger area gradually increases along the rotation direction, the wind speed passing through each element of the heat exchanger gradually decreases, and the wind speed becomes uniform. On the other hand, on the outer periphery of the fan that does not almost face the heat exchanger, the effective heat exchanger area gradually becomes narrower along the rotation direction, so the wind speed passing through each element of the heat exchanger gradually increases, and the wind speed increases. Equalize.
すなわち熱交換器内の通過風速が一定となり、その結果
熱交換器通風抵抗の低減にともなうファン負荷の低減に
より、送風音が低減すると共に、熱交換器効率が向上す
る。That is, the speed of the air passing through the heat exchanger becomes constant, and as a result, the fan load is reduced due to the reduction in the heat exchanger ventilation resistance, which reduces air blowing noise and improves the heat exchanger efficiency.
またシュラウドの筒部内端部の円弧状のベルマウス底部
に水抜き穴を設けたので、上記底部に雨水が溜まるのを
防止することができ、かつ雨水が氷結したり、ツララに
氷結してファンに接触し、ファンを破損するのを防止す
ることができる。In addition, a drainage hole is provided at the bottom of the arc-shaped bell mouth at the inner end of the shroud's cylindrical portion, which prevents rainwater from accumulating at the bottom, and also prevents rainwater from freezing or becoming icicles. This can prevent the fan from coming into contact with the fan and damaging it.
またベルマウスの先端部が、円周方向に常にファン下端
部とファン上端間に配設したので、ベルマウスとファン
外周間の隙間を通って、ファン吐出風の一部が、ファン
吸込側に還流する量が小さくなり、ファン内を通過する
全風量が、むだなく、熱交換器の冷却に寄与すると共に
ファン吸入測置れによる送風音の増加を防止できる。In addition, since the tip of the bell mouth is always placed between the lower end of the fan and the upper end of the fan in the circumferential direction, a portion of the fan discharge air passes through the gap between the bell mouth and the outer circumference of the fan and flows to the fan suction side. The amount of reflux is reduced, and the total amount of air passing through the fan contributes to cooling the heat exchanger without waste, and an increase in air blowing noise due to fan intake measurement can be prevented.
またユニット吸込面に対向した熱交換器の一方をファン
回転方向に沿って延長するように熱交換器を構成したの
で、熱交換器の円周方向各要素に対してファン回転周方
向とユニット吸込面からファン中心への方向が逆となり
うる領域は、狭くなるので、熱交換器内風速分布は、か
なり一様化し、その結果熱交換器通風抵抗低減による送
風音の低減と、熱交換効率が向上する。In addition, since the heat exchanger is configured so that one side of the heat exchanger facing the unit suction surface extends along the fan rotation direction, the fan rotation direction and unit suction The area where the direction from the surface to the center of the fan can be reversed becomes narrower, so the air velocity distribution inside the heat exchanger becomes considerably uniform, resulting in a reduction in air noise due to a reduction in heat exchanger ventilation resistance and an increase in heat exchange efficiency. improves.
以下、本発明の一実施例を第１図乃至第７図により説明
する。第１図は室外に設置された空気調和機を示す上面
図、第２図は、第１図のＡ−Ａ矢視断面図、第３図は、
第１図のＢ−Ｂ矢視断面図。An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. Fig. 1 is a top view showing an air conditioner installed outdoors, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a top view showing an air conditioner installed outdoors.
FIG. 2 is a sectional view taken along the line B-B in FIG. 1;
第４図は、Ｂ−Ｂ断面斜視図、第５図は、ベルマウス付
シュラウドの斜視図、第６図は、第５図のＣ−Ｃ矢視断
面図、第７図は、第３図のＤ部拡大図である。FIG. 4 is a perspective view taken along the line B-B, FIG. 5 is a perspective view of a shroud with a bell mouth, FIG. 6 is a cross-sectional view taken along line C-C in FIG. 5, and FIG. It is an enlarged view of part D.
第１図、第２図及び第３図に示すように、前面パネル１
の一部側面吸込部１２に熱交換器２を設け、他方側面の
モータ取付板３の下方部に機械室４およびリレー基板の
制御部品などを収納する電気品箱５を設けている。また
上記前記パネル１の上記モータ取付板３の上方部に該モ
ータ取付板３に固定支持されたモータ６および該モータ
６により回転駆動するファン７とシュラウド９とを設け
ている。熱交換器２は、第１図に示すように、ユニット
側面吸込部１２に概平行な熱交換器要素２ｂと、これを
ファンの回転方向に延長してなる熱交換器要素２ａと上
記熱交換器要素２ｂをファンの回転と逆方向に延長して
なる熱交換器要素２ｃから構成されており、天板１０と
底抜１１間に設けられている。As shown in FIGS. 1, 2 and 3, the front panel 1
A heat exchanger 2 is provided in a suction portion 12 on one side of the motor, and an electrical component box 5 for storing a machine room 4 and control parts of a relay board, etc. is provided below the motor mounting plate 3 on the other side. Further, above the motor mounting plate 3 of the panel 1, a motor 6 fixedly supported by the motor mounting plate 3, a fan 7 rotationally driven by the motor 6, and a shroud 9 are provided. As shown in FIG. 1, the heat exchanger 2 includes a heat exchanger element 2b approximately parallel to the unit side suction portion 12, a heat exchanger element 2a extending in the rotation direction of the fan, and the heat exchanger element 2a. The heat exchanger element 2c is formed by extending the heat exchanger element 2b in the direction opposite to the rotation of the fan, and is provided between the top plate 10 and the bottom hole 11.
また第５図、第６図に示すように、シュラウド９の上端
部１６とベルマウス先端部１４間の距離Δａが、ファン
挿入開口部１７の外円周上で、１７２円周上では、漸次
大きくなるように、他方１／２円周上では漸次小さくな
るように構成しているシュラウド９を、第１図乃至第４
図に示すようにユニット上面に設けている。細流ファン
７の回転軸は、ユニット底板１１に直交するように構成
しているので、結果的に第７図に示すように、ベルマウ
ス先端部１４とファン下端面１３間の距離Δが、第１図
乃至第６図に示すようにファン回転方向に沿って、熱交
換器に面したファン外周上の半円周上では、漸次小さく
なるようになり、他方他のファン外周上では、漸次大き
くなるようになる。Further, as shown in FIGS. 5 and 6, the distance Δa between the upper end 16 of the shroud 9 and the bell mouth tip 14 gradually changes on the outer circumference of the fan insertion opening 17 and on the 172-circumference. The shroud 9 is constructed so that it becomes larger on the other hand and gradually becomes smaller on the 1/2 circumference, as shown in FIGS.
It is provided on the top of the unit as shown in the figure. Since the rotation axis of the trickle fan 7 is configured to be perpendicular to the unit bottom plate 11, as a result, as shown in FIG. As shown in Figures 1 to 6, along the fan rotation direction, it gradually becomes smaller on the semicircle on the outer circumference of the fan facing the heat exchanger, while on the other hand, on the outer circumference of the fan, it gradually becomes larger. It will become.
ベルマウス先端部１４とファン下端面１３間の距離Δが
、ファン外円周上で一定である従来の室外ユニットでは
、ファンを囲むように構成した熱交換器のファン円周方
向の風速分布は、大きく異なり、特に第１図に示すよう
にファン回転方向下流側に設けられた熱交換器要素２ｃ
内の通過風速が、ファン回転方向上流側に設けられた熱
交換器要素２ａに比べて、小さい。In a conventional outdoor unit in which the distance Δ between the bell mouth tip 14 and the fan lower end surface 13 is constant on the fan's outer circumference, the air velocity distribution in the fan circumferential direction of the heat exchanger configured to surround the fan is as follows. , is significantly different, especially the heat exchanger element 2c provided on the downstream side in the direction of rotation of the fan as shown in FIG.
The speed of air passing through the heat exchanger element 2a is smaller than that of the heat exchanger element 2a provided on the upstream side in the fan rotation direction.
ところで第７図に示すように冷却風はユニット側面吸込
面１２から、熱交換器２を通して、ファン７内に吸入さ
れる。本来ファン吸込部近傍では、風速が速いので、室
外ユニットの熱交換器性能を向上するには、ファン近傍
に設けられた熱交換器要素を有効に利用する必要がある
が、ベルマウス８に相対する熱交換器要素２ｘは、ベル
マウス８にほぼじゃへいされるので、熱交換性能に寄与
しない。そこで本実施例の室外ユニットでは、ベルマウ
ス先端部１４とファン下端面１３間の距離Δを、ファン
円周方向に変化させているので、上記熱交換器要素２Ｘ
の面積が、上記距離Δによって反比例して変化するから
、熱交換器各部の円周方向風速分布が均一化するように
作用する。すなわち本実施例では、風速の大きい熱交換
器要素に対しては、Δを大きくなるよう、ベルマウスを
上部に移動させ、この部分の実効熱交換器面積を増やし
て風速を下げ、一方風速の小さい熱交換器要素に対して
は、逆にΔを小さくなるよう、ベルマウスを下部に移動
させ、この部分の実効熱交換器面積を小さくして風速を
上げることにより、ファンをとり囲むように配設された
熱交換器の円周方向風速分布を均一化するように作用す
る。本実施例によれば、熱交換器用の風速分布の均一化
により、熱交換器内の各部の熱交換量の分布が均一化し
、熱交換効率が増加すると共に、風速の最大値が小さく
なるので、熱交換器通風抵抗が減少し、ファン負荷の低
減にともない、送風音が低減する効果がある。By the way, as shown in FIG. 7, the cooling air is drawn into the fan 7 from the side suction surface 12 of the unit, through the heat exchanger 2. Normally, the wind speed is high near the fan suction part, so in order to improve the heat exchanger performance of the outdoor unit, it is necessary to effectively utilize the heat exchanger element installed near the fan. The heat exchanger element 2x that does not contribute to the heat exchange performance is almost blocked by the bell mouth 8. Therefore, in the outdoor unit of this embodiment, since the distance Δ between the bell mouth tip 14 and the fan lower end surface 13 is changed in the fan circumferential direction, the heat exchanger element 2X
Since the area changes in inverse proportion to the distance Δ, it acts to equalize the circumferential wind velocity distribution in each part of the heat exchanger. In other words, in this example, for a heat exchanger element with a high wind speed, the bell mouth is moved to the top to increase Δ, increasing the effective heat exchanger area in this part and lowering the wind speed. For small heat exchanger elements, conversely, by moving the bell mouth to the bottom to reduce Δ and reducing the effective heat exchanger area in this area and increasing the wind speed, it is possible to surround the fan. It acts to equalize the circumferential wind velocity distribution of the heat exchanger provided. According to this embodiment, by uniformizing the air velocity distribution for the heat exchanger, the distribution of the amount of heat exchanged in each part of the heat exchanger becomes uniform, increasing the heat exchange efficiency and reducing the maximum value of the wind velocity. , heat exchanger ventilation resistance is reduced, fan load is reduced, and air blowing noise is reduced.
さらに第５図に示すように、ベルマウス８付シユラウド
９には、筒部１５の下方先端の円孤状したベルマウス８
の底部に水抜き穴１２を形成した。Furthermore, as shown in FIG.
A drain hole 12 was formed at the bottom of the container.
本実施例においては、上記底部に雨水が溜まるのを防止
するとともに、底部に溜まって雨水が、外気の低温のた
め氷結するのを防止し、かつつららのように氷結してフ
ァンと接触し、ファンを破損するのを防止することがで
きる。In this embodiment, rainwater is prevented from accumulating on the bottom, and the rainwater accumulated on the bottom is also prevented from freezing due to the low temperature of the outside air, freezing like icicles and coming into contact with the fan, This can prevent damage to the fan.
さらに本発明の他の実施例である空気調和機用室外ユニ
ットの上面図を第８図に、さらに第８図のＥ−Ｅ矢視断
面図で、シュラウドのみを示した図を第９図に示す。ユ
ニット吸込面１２にほぼ平行な熱交換器２ｄとその一方
をファン回転方向にほぼ沿うように延長した熱交換器２
ｅで、ファンを囲むように熱交換器２を構成したので、
ファン回転方向下流側の熱交換器要素２ｄは、ユニット
吸込面１２と概平行であり、さらにファン回転中心をユ
ニット中心より、ユニット側板１７側に移動しているの
で、熱交換器２の円周方向各要素に対して、ファン回転
周方向とユニット吸込面１２からファン中心への方向が
逆となりうる領域は、きわめて限られる。この場合、第
９図に示すようにシュラウド９の上面１６とベルマウス
８の先端部１４間の距離Δ１の、回転方向に対する変化
量は、第１図に示す口形熱交換器の場合に比へで小さく
てよい。Furthermore, FIG. 8 shows a top view of an outdoor unit for an air conditioner that is another embodiment of the present invention, and FIG. 9 shows a sectional view taken along the line E-E in FIG. show. A heat exchanger 2d that is approximately parallel to the unit suction surface 12 and a heat exchanger 2 that has one side extended approximately along the fan rotation direction.
Since the heat exchanger 2 was configured to surround the fan in e.
The heat exchanger element 2d on the downstream side in the fan rotation direction is approximately parallel to the unit suction surface 12, and furthermore, since the fan rotation center is moved from the unit center to the unit side plate 17 side, the circumference of the heat exchanger 2 For each direction element, the area in which the circumferential direction of rotation of the fan and the direction from the unit suction surface 12 to the center of the fan can be reversed is extremely limited. In this case, as shown in FIG. 9, the amount of change in the distance Δ1 between the top surface 16 of the shroud 9 and the tip 14 of the bell mouth 8 with respect to the rotation direction is It's good to be small.
この実施例では、熱交換器の円周方向の風速分布の均一
化を熱交換器の形状、ファンのユニット内とりつけ位置
、ベルマウス高さΔ、の周方向変化により達成したもの
である。In this embodiment, the uniformity of the wind velocity distribution in the circumferential direction of the heat exchanger is achieved by changing the shape of the heat exchanger, the mounting position of the fan in the unit, and the bell mouth height Δ in the circumferential direction.
さらに第５図に示すように、ベルマウス付シュラウドは
、樹脂材で一体成形にて作られるように構成し、部品点
数の削減、軽量化、コスト低減を達成している。Furthermore, as shown in FIG. 5, the shroud with a bell mouth is constructed to be integrally molded from a resin material, thereby achieving a reduction in the number of parts, weight reduction, and cost reduction.
本発明によれば、ベルマウス先端面とファン下端間の距
離をファン円周方向に沿って変化させるように構成した
ので、熱交換器円周方向各部の熱交換器通過風速分布が
、均一化するので、熱交換器通風抵抗の低減によりファ
ン負荷が減少し、送風音が、小さくなる効果がある。さ
らに風速分布の均一化による熱交換器各部の熱交換性能
が等しくなるので、熱交換効率が向上するという効果が
ある。さらにベルマウス先端部は、円周方向にファン下
端面とファン上端面間に配設するようにしたので、ベル
マウスとファン間の間隙を流れるしゅんかん流を抑止で
きるので、ベルマウス先端面とファン下端間の距離をフ
ァン円周方向に沿って変化させることによるファン性能
の低下が防止できる。さらにユニット吸込面に対向した
熱交換器の一方をファン回転方向に延長したので、ファ
ン回転方向下流側熱交換器要素での風速の低下が抑止で
きるので、送風音の低減と熱交換性能の向上が図れる。According to the present invention, since the distance between the bell mouth tip face and the fan bottom end is changed along the circumferential direction of the fan, the air velocity distribution passing through the heat exchanger at each part in the circumferential direction of the heat exchanger is made uniform. Therefore, the fan load is reduced due to the reduction of the heat exchanger ventilation resistance, which has the effect of reducing the air blowing noise. Furthermore, since the heat exchange performance of each part of the heat exchanger becomes equal due to the uniformity of the wind speed distribution, there is an effect that the heat exchange efficiency is improved. Furthermore, since the bell mouth tip is disposed circumferentially between the fan lower end surface and the fan upper end surface, it is possible to suppress the drenching flow flowing through the gap between the bell mouth and the fan. Deterioration in fan performance due to changing the distance between the lower ends of the fan along the circumferential direction of the fan can be prevented. Furthermore, one side of the heat exchanger facing the unit suction surface is extended in the direction of fan rotation, which prevents a decrease in wind speed at the downstream heat exchanger element in the direction of fan rotation, reducing blowing noise and improving heat exchange performance. can be achieved.
またシュラウドの筒部下端部の円孤状底部分に水抜き用
穴を設けたので、雨水が溜まるのを防止するとともに雨
水が外気の温度低下によって氷結したり、つららになっ
てファンに接触し、ファンを破損するのを防止すること
ができる。In addition, a drainage hole is provided in the circular bottom of the shroud's lower end to prevent rainwater from accumulating and to prevent rainwater from freezing or forming icicles due to a drop in outside air temperature and coming into contact with the fan. , can prevent damage to the fan.
さらにシュラウドとベルマウスを樹脂一体成形したので
、コストの低減と部品点数の消滅及び軽量化が図られる
。Furthermore, since the shroud and bell mouth are integrally molded with resin, costs can be reduced, the number of parts eliminated, and weight reduced.
第１図は、室外に設置された本発明の一実施例である空
気調和機用室外ユニットの上面図、第２図は、第１図の
Ａ−Ａ矢視断面図、第３図は、第１図のＢ−Ｂ斜視断面
図、第４図は、第１図の矢視Ｂ−Ｂ断面の斜視図、第５
図は、ベルマウス付シュラウドの斜視図、第６図は、第
５図のＣ−Ｃ矢視断面図、第７図は、第３図のＤ部拡大
図、第８図は、他の実施例を示す室外ユニットの上面図
、第９図は、第８図のＥ−Ｅ矢視断面図である。
１・・・前面パネル、２・・・熱交換器、７・・ファン
、８・・・ベルマウス、９・・・シュラウド、１５・・
シュラウド筒部、１２・・・水抜き穴、１６・・・シュ
ラウド上端部、１７・・・ユニット側面パネル。
不 １ 図
Ｙ ｚ 回
第
３
図
１θ
５
ＶＩＩ帥
寓
図
■
卒
図
第
乙
図
葛
図FIG. 1 is a top view of an outdoor unit for an air conditioner that is an embodiment of the present invention installed outdoors, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. FIG. 4 is a perspective view of a cross section taken along line B-B in FIG. 1, and FIG.
The figure is a perspective view of a shroud with a bell mouth, FIG. 6 is a sectional view taken along the line C-C in FIG. 5, FIG. 7 is an enlarged view of section D in FIG. 3, and FIG. FIG. 9, a top view of an example outdoor unit, is a sectional view taken along the line E-E in FIG. 8. 1... Front panel, 2... Heat exchanger, 7... Fan, 8... Bell mouth, 9... Shroud, 15...
Shroud cylindrical portion, 12... Drain hole, 16... Shroud upper end, 17... Unit side panel. No 1 Figure Y z 3rd Figure 1θ 5 VII Marshal Figure ■ Graduation Figure Otsu Figure
Claims (1)
ト上面とし、ユニット天板と床板間に、ファンを囲むよ
うに熱交換器を配設し、ユニット側面の一部から、熱交
換用冷却風を吸入する構造の空気調和機用室外ユニット
において、空気吹出口を形成するシユラウドの先端に、
ファン外周面と所定の間隙を有するように、ファン風案
内用凸部のベルマウスを設け、このベルマウス先端部と
ファン下端部との間の距離を、ファン外周方向に異なる
ように形成したことを特徴とする空気調和機用室外ユニ
ット。 ２、ファン下端部とベルマウス先端部との間の距離が、
熱交換器にほぼ対向する円周上では、ファンの回転方向
に、漸次小さくなるように構成し、一方反熱交換器側で
ある円周上では、ファン回転方向に、漸次大きくなるよ
うにファン送風装置を構成した請求項１に記載の空気調
和機用室外ユニット。 ３、前記ベルマウス先端部は、円周上に、ファン下端面
とファン上端面間に配設するようにファン送風装置を構
成した請求項１又は２に記載の空気調和機用室外ユニッ
ト。 ４、前記シユラウドの筒部内端部の円孤状ベルマウスの
底部に水抜き穴を設けた請求項１、２又は３に記載の空
気調和機用室外ユニット。 ５、ユニット上部に設けた軸流ファンの吹出面を、ユニ
ット上面とし、ユニット天板と床板間にファンを囲むよ
うに熱交換器を配設し、ユニット側面の一部から、熱交
換用冷却風を吸入する構造の空気調和機用室外ユニット
において、ユニット吸込面に対向した熱交換器の一方を
ほぼファン回転方向に沿つて延長するように熱交換器を
構成したことを特徴とする空気調和機用室外ユニット。 ６、シユラウドとベルマウスと水抜き穴を一体樹脂成形
した請求項４に記載の空気調和機用室外ユニット。 ７、空気吹出口を形成するシユラウドの先端に、ファン
外周面と所定の間隙を有するように、ファン風案内用凸
部のベルマウスを設け、このベルマウス先端面とシユラ
ウド上面間の距離が、ファン円周方向に沿つて異なるよ
うに形成されたベルマウス付シユラウドを設けた空気調
和機用室外ユニット。[Claims] 1. The blowing surface of the axial fan installed at the top of the unit is the top surface of the unit, and a heat exchanger is arranged between the unit top plate and the floor plate so as to surround the fan, and a part of the side surface of the unit is provided. In an outdoor unit for an air conditioner that has a structure that draws in cooling air for heat exchange, there is a
A bell mouth of a convex portion for guiding the fan wind is provided so as to have a predetermined gap with the outer circumferential surface of the fan, and the distance between the tip of the bell mouth and the lower end of the fan is formed to vary in the direction of the outer circumference of the fan. An outdoor unit for air conditioners featuring the following. 2. The distance between the bottom end of the fan and the tip of the bell mouth is
On the circumference that is almost facing the heat exchanger, the fan is configured so that it gradually becomes smaller in the direction of rotation of the fan, while on the circumference that is opposite to the heat exchanger, the fan is configured so that it gradually becomes larger in the direction of rotation of the fan. The outdoor unit for an air conditioner according to claim 1, which comprises an air blower. 3. The outdoor unit for an air conditioner according to claim 1 or 2, wherein the fan blower is configured such that the bell mouth tip is disposed on the circumference between a lower end surface of the fan and an upper end surface of the fan. 4. The outdoor unit for an air conditioner according to claim 1, 2 or 3, wherein a drain hole is provided at the bottom of the arc-shaped bell mouth at the inner end of the cylindrical portion of the shroud. 5. The blowing surface of the axial fan installed at the top of the unit is the top of the unit, and a heat exchanger is installed between the unit top plate and floor plate to surround the fan, and a part of the side of the unit is used for cooling for heat exchange. An outdoor unit for an air conditioner having a structure for sucking wind, characterized in that the heat exchanger is configured such that one side of the heat exchanger facing the unit suction surface extends substantially along the fan rotation direction. Aircraft outdoor unit. 6. The outdoor unit for an air conditioner according to claim 4, wherein the shroud, the bell mouth, and the drain hole are integrally molded with resin. 7. At the tip of the shroud that forms the air outlet, a bell mouth is provided as a protrusion for fan wind guidance so as to have a predetermined gap with the outer peripheral surface of the fan, and the distance between the tip surface of the bell mouth and the top surface of the shroud is: An outdoor unit for an air conditioner that is provided with a shroud with a bell mouth that is formed differently along the circumferential direction of the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2053652A JP2810196B2 (en) | 1990-03-07 | 1990-03-07 | Outdoor unit for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2053652A JP2810196B2 (en) | 1990-03-07 | 1990-03-07 | Outdoor unit for air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03255829A true JPH03255829A (en) | 1991-11-14 |
| JP2810196B2 JP2810196B2 (en) | 1998-10-15 |
Family
ID=12948807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2053652A Expired - Fee Related JP2810196B2 (en) | 1990-03-07 | 1990-03-07 | Outdoor unit for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2810196B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0922911A2 (en) | 1997-12-11 | 1999-06-16 | Hitachi, Ltd. | An outdoor unit of an air-conditioning system |
| US7363768B2 (en) | 2002-11-05 | 2008-04-29 | Daikin Industries, Ltd. | Outdoor unit of refrigerator, and electrical equipment box of outdoor unit |
| JP2013139971A (en) * | 2012-01-06 | 2013-07-18 | Mitsubishi Electric Corp | Heat exchanger, indoor machine, and outdoor machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5681369U (en) * | 1979-11-27 | 1981-07-01 | ||
| JPS5688065U (en) * | 1979-12-12 | 1981-07-14 | ||
| JPS61149064U (en) * | 1985-03-06 | 1986-09-13 |
-
1990
- 1990-03-07 JP JP2053652A patent/JP2810196B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5681369U (en) * | 1979-11-27 | 1981-07-01 | ||
| JPS5688065U (en) * | 1979-12-12 | 1981-07-14 | ||
| JPS61149064U (en) * | 1985-03-06 | 1986-09-13 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0922911A2 (en) | 1997-12-11 | 1999-06-16 | Hitachi, Ltd. | An outdoor unit of an air-conditioning system |
| EP0922911A3 (en) * | 1997-12-11 | 2001-06-20 | Hitachi, Ltd. | An outdoor unit of an air-conditioning system |
| US7363768B2 (en) | 2002-11-05 | 2008-04-29 | Daikin Industries, Ltd. | Outdoor unit of refrigerator, and electrical equipment box of outdoor unit |
| JP2013139971A (en) * | 2012-01-06 | 2013-07-18 | Mitsubishi Electric Corp | Heat exchanger, indoor machine, and outdoor machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2810196B2 (en) | 1998-10-15 |
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| LAPS | Cancellation because of no payment of annual fees |