JP2015140998A - Indoor unit for air conditioner - Google Patents

Indoor unit for air conditioner Download PDF

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JP2015140998A
JP2015140998A JP2014015377A JP2014015377A JP2015140998A JP 2015140998 A JP2015140998 A JP 2015140998A JP 2014015377 A JP2014015377 A JP 2014015377A JP 2014015377 A JP2014015377 A JP 2014015377A JP 2015140998 A JP2015140998 A JP 2015140998A
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Prior art keywords
refrigerant pipe
liquid
gas
refrigerant
flare union
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JP5861723B2 (en
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透 安東
Toru Ando
透 安東
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Daikin Industries Ltd
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Daikin Industries Ltd
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Priority to JP2014015377A priority Critical patent/JP5861723B2/en
Priority to EP15743820.1A priority patent/EP3101353B1/en
Priority to CN201580004692.XA priority patent/CN105917173B/en
Priority to AU2015212207A priority patent/AU2015212207B2/en
Priority to PCT/JP2015/050130 priority patent/WO2015115127A1/en
Priority to ES15743820.1T priority patent/ES2678749T3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit for an air conditioner capable of reducing danger of breakage in a connection part between a first refrigerant pipeline and a second refrigerant pipeline.SOLUTION: An indoor unit of an air conditioner includes: first refrigerant pipelines 5, 7 in which one end part is connected to an indoor heat exchanger 2, and which are formed by aluminum or aluminum alloy; second refrigerant pipelines 6, 8 in which one end part is connected to the other end part of the first refrigerant pipelines 5, 7, and which are formed by copper or copper alloy; and flare unions 9, 10 which are connected to the other end part of the second refrigerant pipelines 6, 8. A connection part between the other end part of the first refrigerant pipelines 5, 7 and the one end part of the second refrigerant pipelines 6, 8 is between an end of the flare unions 9, 10 side of bent parts 5b, 7b of the first refrigerant pipelines 5, 7 and an end of the flare unions 9, 10 side of the second refrigerant pipelines 6, 8. Thereby, in the connection part, large twist stress and bending stress can be prevented from occurring.

Description

この発明は空気調和機の室内ユニットに関する。   The present invention relates to an indoor unit of an air conditioner.

従来、空気調和機の室内ユニットとしては、ケーシング内に、図５に示すような室内熱交換器１０１が配置されたものがある(例えば特開２０１３−１５５８９２号公報(特許文献１)参照)。また、接続配管１０２の一端部が室内熱交換器１０１に接続されて、冷媒が接続配管１０２によって室内熱交換器１０１または室外熱交換器(図示せず)に案内される。   Conventionally, as an indoor unit of an air conditioner, there is an indoor unit in which an indoor heat exchanger 101 as shown in FIG. 5 is arranged in a casing (see, for example, Japanese Patent Laid-Open No. 2013-155892 (Patent Document 1)). One end of the connection pipe 102 is connected to the indoor heat exchanger 101, and the refrigerant is guided to the indoor heat exchanger 101 or the outdoor heat exchanger (not shown) through the connection pipe 102.

上記接続配管１０２は、室内熱交換器１０１の上部から下方に向かって延在して、屈曲して水平方向に延在している。また、接続配管１０２は、室内熱交換器１０１側に配置された第１冷媒配管１０３と、室内熱交換器１０１側とは反対側に配置された第２冷媒配管１０４とからなっている。この第１冷媒配管１０３は、アルミニウムまたはアルミニウム合金で形成されている。一方、第２冷媒配管１０４は、銅または銅合金で形成されている。   The connection pipe 102 extends downward from the upper part of the indoor heat exchanger 101, is bent, and extends in the horizontal direction. The connection pipe 102 includes a first refrigerant pipe 103 arranged on the indoor heat exchanger 101 side and a second refrigerant pipe 104 arranged on the opposite side to the indoor heat exchanger 101 side. The first refrigerant pipe 103 is made of aluminum or an aluminum alloy. On the other hand, the second refrigerant pipe 104 is made of copper or a copper alloy.

また、上記第１冷媒配管１０３の他端部(室内熱交換器１０１側とは反対側の端部)は、第２冷媒配管１０４の一端部(室内熱交換器１０１側の端部)に接続されている。この第１冷媒配管１０３と第２冷媒配管１０４の接続部１０６は、接続配管１０２において上下方向に延在する部分に配置されている。また、第２冷媒配管１０４の他端部(室内熱交換器１０１側とは反対側の端部)には、フレアユニオン１０５がろう付けされている。   The other end of the first refrigerant pipe 103 (the end opposite to the indoor heat exchanger 101 side) is connected to one end of the second refrigerant pipe 104 (the end on the indoor heat exchanger 101 side). Has been. The connection portion 106 between the first refrigerant pipe 103 and the second refrigerant pipe 104 is disposed in a portion extending in the vertical direction in the connection pipe 102. A flare union 105 is brazed to the other end of the second refrigerant pipe 104 (the end opposite to the indoor heat exchanger 101 side).

特開２０１３−１５５８９２号公報JP2013-155892A

ところで、上記室内ユニットを室内の壁に据え付けるとき、室内ユニットの据え付け場所によっては、作業者が接続配管１０２を曲げなければならない。この場合、作業者は、接続配管１０２において水平方向に延在する部分を、上下方向に移動させたり、第１冷媒配管１０３を中心に回動させたりする。これにより、第１冷媒配管１０３と第２冷媒配管１０４の接続部１０６には、ねじりや曲げの応力が生じてしまう。この接続部１０６は、互いに異なる金属で形成されているため、ねじりや曲げの応力に対して弱い。   By the way, when the indoor unit is installed on the indoor wall, an operator must bend the connection pipe 102 depending on the installation location of the indoor unit. In this case, the worker moves a portion extending in the horizontal direction in the connection pipe 102 in the vertical direction or rotates the first refrigerant pipe 103 as a center. As a result, torsional or bending stress is generated in the connecting portion 106 between the first refrigerant pipe 103 and the second refrigerant pipe 104. Since the connecting portion 106 is formed of different metals, it is weak against torsional or bending stress.

したがって、上記従来の空気調和機の室内ユニットでは、第１冷媒配管１０３と第２冷媒配管１０４の接続部１０６が破断する危険性が大きいという問題がある。   Therefore, in the indoor unit of the conventional air conditioner, there is a problem that there is a high risk that the connecting portion 106 between the first refrigerant pipe 103 and the second refrigerant pipe 104 is broken.

そこで、この発明の課題は、第１冷媒配管と第２冷媒配管の接続部が破断する危険性を下げることができる空気調和機の室内ユニットを提供することにある。   Then, the subject of this invention is providing the indoor unit of the air conditioner which can reduce the danger that the connection part of 1st refrigerant | coolant piping and 2nd refrigerant | coolant piping will fracture | rupture.

上記課題を解決するため、この発明の空気調和機の室内ユニットは、
ケーシングと、
上記ケーシング内に配置された室内熱交換器と、
一端部が上記室内熱交換器に接続されていると共に、アルミニウムまたはアルミニウム合金で形成された第１冷媒配管と、
一端部が上記第１冷媒配管の他端部に接続されていると共に、銅または銅合金で形成された第２冷媒配管と、
上記第２冷媒配管の他端部に接続された継手部と
を備え、
上記第１冷媒配管は、上記ケーシングの側部に沿うように延在する延在部と、この延在部の上記継手部側の端に連なって上記継手部側に屈曲する屈曲部とを有し、
上記第１冷媒配管の他端部と上記第２冷媒配管の一端部との接続部は、上記屈曲部の上記継手部側の端と上記第２冷媒配管の上記継手部側の端との間にあることを特徴としている。 In order to solve the above problems, an indoor unit of an air conditioner of the present invention is
A casing,
An indoor heat exchanger disposed in the casing;
A first refrigerant pipe formed of aluminum or an aluminum alloy with one end connected to the indoor heat exchanger;
A second refrigerant pipe formed of copper or a copper alloy with one end connected to the other end of the first refrigerant pipe;
A joint connected to the other end of the second refrigerant pipe,
The first refrigerant pipe has an extending portion that extends along the side portion of the casing, and a bent portion that is bent toward the joint portion side and is connected to an end of the extending portion on the joint portion side. And
The connecting portion between the other end portion of the first refrigerant pipe and the one end portion of the second refrigerant pipe is between the end of the bent portion on the joint portion side and the end of the second refrigerant pipe on the joint portion side. It is characterized by that.

上記構成によれば、上記第１冷媒配管の他端部と第２冷媒配管の一端部との接続部は、屈曲部の継手部側の端と第２冷媒配管の継手部側の端との間にある。これにより、上記第１冷媒配管の延在部に対して例えば第２冷媒配管を動かした場合、上記接続部に生じるねじりや曲げの応力は、上記延在部に生じるねじりや曲げの応力に比べて小さい。したがって、上記接続部が破断する危険性を下げることができる。   According to the said structure, the connection part of the other end part of said 1st refrigerant | coolant piping and the one end part of 2nd refrigerant | coolant piping is the edge of the joint part side of a bending part, and the edge of the joint part side of 2nd refrigerant | coolant piping. between. Thereby, for example, when the second refrigerant pipe is moved with respect to the extended portion of the first refrigerant pipe, the twisting and bending stress generated in the connecting portion is compared with the twisting and bending stress generated in the extending portion. Small. Therefore, the risk that the connecting portion breaks can be reduced.

一実施形態の空気調和機の室内ユニットでは、
上記第１冷媒配管の他端部と上記第２冷媒配管の一端部との接続部は、上記屈曲部の上記継手部側の端と上記第２冷媒配管の上記継手部側の端との中間よりも上記継手部側にある。 In the indoor unit of the air conditioner of one embodiment,
The connecting portion between the other end portion of the first refrigerant pipe and the one end portion of the second refrigerant pipe is an intermediate between the end of the bent portion on the joint portion side and the end of the second refrigerant pipe on the joint portion side. More on the joint side.

上記実施形態によれば、上記第１冷媒配管の他端部と第２冷媒配管の一端部との接続部は、屈曲部の継手部側の端と第２冷媒配管の継手部側の端との中間よりも継手部側にあるので、大きなねじりや曲げの応力が接続部に生じる可能性を確実に下げることができる。   According to the said embodiment, the connection part of the other end part of said 1st refrigerant | coolant piping and the one end part of 2nd refrigerant | coolant piping is the end by the side of the joint part of a bending part, and the end by the side of the joint part of 2nd refrigerant | coolant piping. Therefore, the possibility that a large torsional or bending stress is generated in the connecting portion can be reliably reduced.

この発明の空気調和機は、ケーシングと、このケーシング内に配置された室内熱交換器と、一端部が室内熱交換器に接続されていると共に、アルミニウムまたはアルミニウム合金で形成された第１冷媒配管と、一端部が第１冷媒配管の他端部に接続されていると共に、銅または銅合金で形成された第２冷媒配管と、第２冷媒配管の他端部に接続された継手部とを備え、第１冷媒配管は、ケーシングの側部に沿うように延在する延在部と、この延在部の継手部側の端に連なって継手部側に屈曲する屈曲部とを有し、第１冷媒配管の他端部と第２冷媒配管の一端部との接続部は、屈曲部の継手部側の端と第２冷媒配管の継手部側の端との間にあるので、第１冷媒配管の延在部に対して例えば第２冷媒配管を動かしても、接続部に生じるねじりや曲げの応力を小さくすることができる。したがって、上記接続部が破断する危険性を下げることができる。   An air conditioner according to the present invention includes a casing, an indoor heat exchanger disposed in the casing, a first refrigerant pipe made of aluminum or an aluminum alloy, and having one end connected to the indoor heat exchanger. And a first refrigerant pipe connected to the other end of the first refrigerant pipe, a second refrigerant pipe formed of copper or a copper alloy, and a joint connected to the other end of the second refrigerant pipe. The first refrigerant pipe has an extending part extending along the side part of the casing, and a bent part that is bent to the joint part side and is connected to an end of the extending part on the joint part side, Since the connecting portion between the other end portion of the first refrigerant pipe and the one end portion of the second refrigerant pipe is between the end of the bent portion on the joint portion side and the end of the second refrigerant pipe on the joint portion side, Even if, for example, the second refrigerant pipe is moved with respect to the extended part of the refrigerant pipe, the torsion or bending generated in the connection part It is possible to reduce the stress. Therefore, the risk that the connecting portion breaks can be reduced.

図１はこの発明の一実施の形態の空気調和機の室内ユニットの概略斜視図である。FIG. 1 is a schematic perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention. 図２は上記室内ユニットの他の概略斜視図である。FIG. 2 is another schematic perspective view of the indoor unit. 図３は上記室内ユニットの室内熱交換器およびその周辺部の背面図である。FIG. 3 is a rear view of the indoor heat exchanger of the indoor unit and its peripheral part. 図４は上記室内ユニットの他の概略斜視図である。FIG. 4 is another schematic perspective view of the indoor unit. 図５は従来の空気調和機の室内ユニットの構成を説明するための模式図である。FIG. 5 is a schematic diagram for explaining the configuration of an indoor unit of a conventional air conditioner.

以下、この発明の空気調和機を図示の実施の形態により詳細に説明する。   Hereinafter, the air conditioner of this invention is demonstrated in detail by embodiment of illustration.

図１は、この発明の一実施形態の空気調和機の室内ユニットを正面側の斜め下方から見た概略斜視図である。また、図２は、上記室内ユニットを背面側の斜め上方から見た概略斜視図である。   FIG. 1 is a schematic perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention as viewed obliquely from the front side. FIG. 2 is a schematic perspective view of the indoor unit as viewed obliquely from the rear side.

上記室内ユニットは、図１，図２に示すように、ケーシング１と、このケーシング１内に配置された室内熱交換器２(図３に示す)とを備える。このケーシング１の上部には、室内空気を吸い込む吸込口１ａが設けられている。一方、ケーシング１の下部には、室内熱交換器２を通過した室内空気を吹き出す吹出口１ｂが設けられている。また、吹出口１ｂには風向羽根１２が取り付けられている。また、室内熱交換器２の下流側、かつ、吹出口１ｂの上流側には、クロスフローファン(図示せず)が配置されている。なお、この空気調和機では、図示しない室外ユニットの圧縮機、四路弁、室外熱交換器および膨張手段(例えば膨張弁)と、室内熱交換器２とが、環状に接続されて、冷媒回路の主要部を構成している。   As shown in FIGS. 1 and 2, the indoor unit includes a casing 1 and an indoor heat exchanger 2 (shown in FIG. 3) disposed in the casing 1. The upper portion of the casing 1 is provided with a suction port 1a for sucking room air. On the other hand, at the lower part of the casing 1, there is provided an air outlet 1 b that blows out indoor air that has passed through the indoor heat exchanger 2. Moreover, the wind direction blade | wing 12 is attached to the blower outlet 1b. A cross flow fan (not shown) is disposed on the downstream side of the indoor heat exchanger 2 and on the upstream side of the air outlet 1b. In this air conditioner, a compressor of an outdoor unit, not shown, a four-way valve, an outdoor heat exchanger and an expansion means (for example, an expansion valve), and the indoor heat exchanger 2 are connected in a ring shape to form a refrigerant circuit. The main part of

図３は上記室内熱交換器２およびその周辺部の背面図である。   FIG. 3 is a rear view of the indoor heat exchanger 2 and its peripheral part.

上記室内熱交換器２は、熱交換部３と、この熱交換部３を貫通する複数の伝熱管４，４，…とを有する。この熱交換部３および各伝熱管４は、それぞれ、アルミニウムまたはアルミニウム合金で形成されている。   The indoor heat exchanger 2 includes a heat exchanging unit 3 and a plurality of heat transfer tubes 4, 4,... Penetrating the heat exchanging unit 3. The heat exchange unit 3 and each heat transfer tube 4 are each formed of aluminum or an aluminum alloy.

また、上記室内ユニットは、液用第１冷媒配管５と、この液用第１冷媒配管５と連通する液用第２冷媒配管６と、ガス用第１冷媒配管７と、このガス用第１冷媒配管７と連通するガス用第２冷媒配管８と、液用フレアユニオン９と、ガス用フレアユニオン１０とを備えている。この液用第１冷媒配管５およびガス用第１冷媒配管７は、それぞれ、アルミニウムまたはアルミニウム合金で形成されている。一方、液用第２冷媒配管６およびガス用第２冷媒配管８は、それぞれ、銅または銅合金で形成されている。なお、液用第１冷媒配管５およびガス用第１冷媒配管７は、第１冷媒配管の一例である。また、液用第２冷媒配管６およびガス用第２冷媒配管８は、第２冷媒配管の一例である。また、液用フレアユニオン９およびガス用フレアユニオン１０は、継手部の一例である。   The indoor unit includes a liquid first refrigerant pipe 5, a liquid second refrigerant pipe 6 communicating with the liquid first refrigerant pipe 5, a gas first refrigerant pipe 7, and the gas first refrigerant pipe 5. A gas second refrigerant pipe 8 communicating with the refrigerant pipe 7, a liquid flare union 9, and a gas flare union 10 are provided. The liquid first refrigerant pipe 5 and the gas first refrigerant pipe 7 are each formed of aluminum or an aluminum alloy. On the other hand, the liquid second refrigerant pipe 6 and the gas second refrigerant pipe 8 are each formed of copper or a copper alloy. The liquid first refrigerant pipe 5 and the gas first refrigerant pipe 7 are examples of the first refrigerant pipe. The liquid second refrigerant pipe 6 and the gas second refrigerant pipe 8 are examples of the second refrigerant pipe. The liquid flare union 9 and the gas flare union 10 are examples of joint portions.

上記液用第１冷媒配管５は、分流合流器１１を介して伝熱管４の一端部に接続されている。この液用第１冷媒配管５は、ケーシング１の側部に沿って延在する側部側直線部５ａと、この側部側直線部５ａの液用フレアユニオン９側の端に連なって液用フレアユニオン９側に屈曲する屈曲部５ｂと、この屈曲部５ｂの液用フレアユニオン９側の端に連なってケーシング１の下部に沿って延在する下部側直線部５ｃとを有する。なお、側部側直線部５ａは延在部の一例である。   The liquid first refrigerant pipe 5 is connected to one end of the heat transfer tube 4 via a branching / merging device 11. The liquid first refrigerant pipe 5 is connected to the side linear portion 5a extending along the side of the casing 1 and the liquid flare union 9 side end of the side linear portion 5a. It has a bent portion 5b bent to the flare union 9 side, and a lower straight portion 5c extending along the lower portion of the casing 1 connected to the end of the bent portion 5b on the liquid flare union 9 side. In addition, the side part side straight part 5a is an example of an extension part.

一方、上記液用第２冷媒配管６の一端部(下部側直線部５ｃ側の端部)は、液用第１冷媒配管５の他端部(液用第２冷媒配管６側の端部)に接続されている。より詳しくは、下部側直線部５ｃの液用第２冷媒配管６側の端部は、下部側直線部５ｃの他の部分よりも拡径されており、液用第２冷媒配管６の一端部が挿入される。そして、下部側直線部５ｃの液用第２冷媒配管６側の端部は、液用第２冷媒配管６の一端部との間のろう材により、液用第２冷媒配管６の一端部に固定される。また、下部側直線部５ｃの液用第２冷媒配管６側の端部およびこの周辺部は熱収縮チューブ内に挿入して露出しないようにする。また、液用第２冷媒配管６の他端部には液用フレアユニオン９が接続されている。   On the other hand, one end of the liquid second refrigerant pipe 6 (the end on the lower straight part 5c side) is the other end of the liquid first refrigerant pipe 5 (the end on the liquid second refrigerant pipe 6 side). It is connected to the. More specifically, the end of the lower-side straight portion 5c on the liquid second refrigerant pipe 6 side has a larger diameter than the other part of the lower-side straight portion 5c, and one end of the liquid-use second refrigerant pipe 6 Is inserted. And the edge part by the side of the 2nd refrigerant | coolant piping 6 for liquids of the lower side straight part 5c is made into the one end part of the 2nd refrigerant | coolant piping 6 for liquids by the brazing material between one end part of the 2nd refrigerant | coolant piping 6 for liquids. Fixed. Further, the end of the lower straight portion 5c on the liquid second refrigerant pipe 6 side and its peripheral portion are inserted into the heat shrinkable tube so as not to be exposed. A liquid flare union 9 is connected to the other end of the liquid second refrigerant pipe 6.

すなわち、上記液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との間に配置されている。より正確に言うと、上記接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも液用フレアユニオン９側に配置されている。   That is, the connecting portion between the other end of the first liquid refrigerant pipe 5 and one end of the second liquid refrigerant pipe 6 is connected to the end of the bent portion 5b on the liquid flare union 9 side and the second liquid refrigerant pipe. 6 and the liquid flare union 9 side end. To be more precise, the connecting portion has a liquid flare union 9 that is intermediate between the end of the bent portion 5b on the liquid flare union 9 side and the end of the liquid second refrigerant pipe 6 on the liquid flare union 9 side. Arranged on the side.

上記ガス用第１冷媒配管７は、分流合流器(図示せず)を介して他の伝熱管４の一端部に接続されている。このガス用第１冷媒配管７は、ケーシング１の側部に沿って延在する側部側直線部７ａと、この側部側直線部７ａのガス用フレアユニオン１０側の端に連なってガス用フレアユニオン１０側に屈曲する屈曲部７ｂと、この屈曲部７ｂのガス用フレアユニオン１０側の端に連なってケーシング１の下部に沿って延在する下部側直線部７ｃとを有する。なお、側部側直線部７ａは延在部の一例である。   The gas first refrigerant pipe 7 is connected to one end of another heat transfer pipe 4 via a branching / merging device (not shown). The gas first refrigerant pipe 7 is connected to the side-side straight portion 7a extending along the side portion of the casing 1 and the end of the side-side straight portion 7a on the gas flare union 10 side. A bent portion 7b that is bent toward the flare union 10 side and a lower-side straight portion 7c that extends along the lower portion of the casing 1 connected to the end of the bent portion 7b on the gas flare union 10 side. In addition, the side part side linear part 7a is an example of an extension part.

一方、上記ガス用第２冷媒配管８の一端部(下部側直線部７ｃ側の端部)は、ガス用第１冷媒配管７の他端部(ガス用第２冷媒配管８側の端部)に接続されている。より詳しくは、下部側直線部７ｃのガス用第２冷媒配管８側の端部は、下部側直線部７ｃの他の部分よりも拡径されており、ガス用第２冷媒配管８の一端部が挿入される。そして、下部側直線部７ｃのガス用第２冷媒配管８側の端部は、ガス用第２冷媒配管８の一端部との間のろう材により、ガス用第２冷媒配管８の一端部に固定される。また、下部側直線部７ｃのガス用第２冷媒配管８側の端部およびこの周辺部は熱収縮チューブ内に挿入して露出しないようにする。また、ガス用第２冷媒配管８の他端部にはガス用フレアユニオン１０が接続されている。   On the other hand, one end of the gas second refrigerant pipe 8 (the end on the lower straight part 7c side) is the other end of the gas first refrigerant pipe 7 (the end on the gas second refrigerant pipe 8 side). It is connected to the. More specifically, the end portion of the lower straight portion 7c on the gas second refrigerant pipe 8 side has a larger diameter than the other portion of the lower straight portion 7c, and one end portion of the gas second refrigerant pipe 8 Is inserted. The end of the lower straight portion 7c on the gas second refrigerant pipe 8 side is connected to one end of the gas second refrigerant pipe 8 by a brazing material between the gas second refrigerant pipe 8 and one end thereof. Fixed. Further, the end portion of the lower straight portion 7c on the gas second refrigerant pipe 8 side and its peripheral portion are inserted into the heat shrinkable tube so as not to be exposed. A gas flare union 10 is connected to the other end of the second gas refrigerant pipe 8.

すなわち、上記ガス用第１冷媒配管７の他端部とガス用第２冷媒配管８の一端部との接続部は、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との間に配置されている。より正確に言うと、上記接続部は、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との中間よりもガス用フレアユニオン１０側に配置されている。   That is, the connecting portion between the other end portion of the first gas refrigerant pipe 7 and one end portion of the second gas refrigerant pipe 8 is the end of the bent portion 7b on the gas flare union 10 side and the second gas refrigerant pipe. 8 and the gas flare union 10 side end. More precisely, the connecting portion is configured so that the gas flare union 10 is more intermediate than the end of the bent portion 7b on the gas flare union 10 side and the end of the gas second refrigerant pipe 8 on the gas flare union 10 side. Arranged on the side.

上記構成の空気調和機の室内ユニットによれば、据え付け時、液用第１冷媒配管５の下部側直線部５ｃと液用第２冷媒配管６とを、図４に示すように、液用第１冷媒配管５の側部側直線部５ａに近づける場合がある。この場合、側部側直線部５ａにはねじりや曲げの応力が生じるが、互いに異なる金属で形成された接続部が側部側直線部５ａに配置されていないので、側部側直線部５ａの破断の危険性は低い。   According to the indoor unit of the air conditioner configured as described above, when installed, the lower straight portion 5c of the liquid first refrigerant pipe 5 and the liquid second refrigerant pipe 6 are connected to the liquid first refrigerant pipe 5 as shown in FIG. In some cases, the refrigerant pipe 5 may be brought closer to the side straight portion 5a. In this case, although stress of twisting or bending occurs in the side portion side straight portion 5a, since the connecting portions formed of different metals are not arranged in the side portion straight portion 5a, the side portion straight portion 5a The risk of breakage is low.

また、その場合、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との間の部分に生じるねじりや曲げの応力は、液用第１冷媒配管５の側部側直線部５ａに生じるねじりや曲げの応力よりも小さい。したがって、液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部が、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との間に配置されているので、この接続部の破断の危険性を下げることができる。   In that case, the torsional or bending stress generated in the portion between the end of the bent portion 5b on the liquid flare union 9 side and the end of the liquid second refrigerant pipe 6 on the liquid flare union 9 side is It is smaller than the torsional or bending stress produced in the side part side straight part 5a of the first refrigerant pipe 5. Accordingly, the connecting portion between the other end of the liquid first refrigerant pipe 5 and one end of the liquid second refrigerant pipe 6 is the end of the bent portion 5b on the liquid flare union 9 side and the liquid second refrigerant pipe 6. Since it is disposed between the liquid flare union 9 and the end on the liquid flare union 9 side, the risk of breakage of the connecting portion can be reduced.

また、上記液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも液用フレアユニオン９側に配置されている。これにより、大きなねじりや曲げの応力が上記接続部に生じる可能性を確実に下げることができる。   The connecting portion between the other end of the first liquid refrigerant pipe 5 and one end of the second liquid refrigerant pipe 6 is connected to the end of the bent portion 5b on the liquid flare union 9 side and the second liquid refrigerant pipe. 6 is arranged closer to the liquid flare union 9 side than the middle of the liquid flare union 9 side. Thereby, the possibility that a large torsional or bending stress is generated in the connecting portion can be reliably reduced.

また、上記ガス用第１冷媒配管７の下部側直線部７ｃとガス用第２冷媒配管８とを、ガス用第１冷媒配管７の側部側直線部７ａに近づけても、上述した作用効果と同様の作用効果がガス用第１冷媒配管７およびガス用第２冷媒配管８で得られる。   The above-described effects can be obtained even when the lower straight portion 7c of the gas first refrigerant pipe 7 and the second refrigerant pipe 8 for gas are brought closer to the side straight portion 7a of the first refrigerant pipe 7 for gas. The same effect as that of the first refrigerant pipe 7 for gas and the second refrigerant pipe 8 for gas is obtained.

また、上記熱交換部３および各伝熱管４は、それぞれ、アルミニウムまたはアルミニウム合金で形成されているので、製造コストを低減できる。   Moreover, since the said heat exchange part 3 and each heat exchanger tube 4 are each formed with aluminum or aluminum alloy, manufacturing cost can be reduced.

上記実施形態では、液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも液用フレアユニオン９側に配置されていたが、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも屈曲部５ｂ側に配置されるようにしてもよい。   In the above embodiment, the connection portion between the other end of the liquid first refrigerant pipe 5 and the one end of the liquid second refrigerant pipe 6 is the end of the bent portion 5b on the liquid flare union 9 side and the liquid second. The refrigerant pipe 6 is disposed on the liquid flare union 9 side rather than the middle of the liquid flare union 9 side end, but the liquid flare union 9 side end of the bent part 5b and the liquid second refrigerant pipe 6 are disposed. You may make it arrange | position to the bending part 5b side rather than the intermediate | middle with the end by the side of the liquid flare union 9 side.

上記実施形態では、ガス用第１冷媒配管７の他端とガス用第２冷媒配管８の一端との接続部は、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との中間よりもガス用フレアユニオン１０側に配置されていたが、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との中間よりも屈曲部７ｂ側に配置されるようにしてもよい。   In the above embodiment, the connecting portion between the other end of the gas first refrigerant pipe 7 and the one end of the gas second refrigerant pipe 8 is the end of the bent portion 7b on the gas flare union 10 side and the gas second refrigerant pipe. The gas flare union 10 side of the gas flare union 10 side of the gas flare union 10 side of the gas, and the gas flare union 10 side end of the bent portion 7b and the gas in the gas second refrigerant pipe 8 You may make it arrange | position at the bending part 7b side rather than the intermediate | middle with the end by the side of the flare union 10 for use.

上記実施形態において、液用第１冷媒配管５、液用第２冷媒配管６、ガス用第１冷媒配管７およびガス用第２冷媒配管８を、断熱材で覆って一体にしてもよい。   In the above-described embodiment, the liquid first refrigerant pipe 5, the liquid second refrigerant pipe 6, the gas first refrigerant pipe 7, and the gas second refrigerant pipe 8 may be covered with a heat insulating material and integrated.

この発明の具体的な実施形態について説明したが、この発明は上記実施形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。   Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention.

１ ケーシング
１ａ 吸込口
１ｂ 吹出口
２ 室内熱交換器
３ 熱交換部
４ 伝熱管
５ 液用第１冷媒配管
５ａ 側部側直線部
５ｂ 屈曲部
５ｃ 下部側直線部
６ 液用第２冷媒配管
７ ガス用第１冷媒配管
７ａ 側部側直線部
７ｂ 屈曲部
７ｃ 下部側直線部
８ ガス用第２冷媒配管
９ 液用フレアユニオン
１０ ガス用フレアユニオン DESCRIPTION OF SYMBOLS 1 Casing 1a Inlet 1b Outlet 2 Indoor heat exchanger 3 Heat exchange part 4 Heat transfer pipe 5 Liquid first refrigerant pipe 5a Side part side straight part 5b Bend part 5c Lower side straight part 6 Liquid second refrigerant pipe 7 Gas First refrigerant piping 7a side-side straight portion 7b bent portion 7c lower-side straight portion 8 second refrigerant piping for gas 9 flare union for liquid 10 flare union for gas

この発明は空気調和機の室内ユニットに関する。   The present invention relates to an indoor unit of an air conditioner.

従来、空気調和機の室内ユニットとしては、ケーシング内に、図５に示すような室内熱交換器１０１が配置されたものがある(例えば特開２０１３−１５５８９２号公報(特許文献１)参照)。また、接続配管１０２の一端部が室内熱交換器１０１に接続されて、冷媒が接続配管１０２によって室内熱交換器１０１または室外熱交換器(図示せず)に案内される。   Conventionally, as an indoor unit of an air conditioner, there is an indoor unit in which an indoor heat exchanger 101 as shown in FIG. 5 is arranged in a casing (see, for example, Japanese Patent Laid-Open No. 2013-155892 (Patent Document 1)). One end of the connection pipe 102 is connected to the indoor heat exchanger 101, and the refrigerant is guided to the indoor heat exchanger 101 or the outdoor heat exchanger (not shown) through the connection pipe 102.

上記接続配管１０２は、室内熱交換器１０１の上部から下方に向かって延在して、屈曲して水平方向に延在している。また、接続配管１０２は、室内熱交換器１０１側に配置された第１冷媒配管１０３と、室内熱交換器１０１側とは反対側に配置された第２冷媒配管１０４とからなっている。この第１冷媒配管１０３は、アルミニウムまたはアルミニウム合金で形成されている。一方、第２冷媒配管１０４は、銅または銅合金で形成されている。   The connection pipe 102 extends downward from the upper part of the indoor heat exchanger 101, is bent, and extends in the horizontal direction. The connection pipe 102 includes a first refrigerant pipe 103 arranged on the indoor heat exchanger 101 side and a second refrigerant pipe 104 arranged on the opposite side to the indoor heat exchanger 101 side. The first refrigerant pipe 103 is made of aluminum or an aluminum alloy. On the other hand, the second refrigerant pipe 104 is made of copper or a copper alloy.

また、上記第１冷媒配管１０３の他端部(室内熱交換器１０１側とは反対側の端部)は、第２冷媒配管１０４の一端部(室内熱交換器１０１側の端部)に接続されている。この第１冷媒配管１０３と第２冷媒配管１０４の接続部１０６は、接続配管１０２において上下方向に延在する部分に配置されている。また、第２冷媒配管１０４の他端部(室内熱交換器１０１側とは反対側の端部)には、フレアユニオン１０５がろう付けされている。   The other end of the first refrigerant pipe 103 (the end opposite to the indoor heat exchanger 101 side) is connected to one end of the second refrigerant pipe 104 (the end on the indoor heat exchanger 101 side). Has been. The connection portion 106 between the first refrigerant pipe 103 and the second refrigerant pipe 104 is disposed in a portion extending in the vertical direction in the connection pipe 102. A flare union 105 is brazed to the other end of the second refrigerant pipe 104 (the end opposite to the indoor heat exchanger 101 side).

特開２０１３−１５５８９２号公報JP2013-155892A

ところで、上記室内ユニットを室内の壁に据え付けるとき、室内ユニットの据え付け場所によっては、作業者が接続配管１０２を曲げなければならない。この場合、作業者は、接続配管１０２において水平方向に延在する部分を、上下方向に移動させたり、第１冷媒配管１０３を中心に回動させたりする。これにより、第１冷媒配管１０３と第２冷媒配管１０４の接続部１０６には、ねじりや曲げの応力が生じてしまう。この接続部１０６は、互いに異なる金属で形成されているため、ねじりや曲げの応力に対して弱い。   By the way, when the indoor unit is installed on the indoor wall, an operator must bend the connection pipe 102 depending on the installation location of the indoor unit. In this case, the worker moves a portion extending in the horizontal direction in the connection pipe 102 in the vertical direction or rotates the first refrigerant pipe 103 as a center. As a result, torsional or bending stress is generated in the connecting portion 106 between the first refrigerant pipe 103 and the second refrigerant pipe 104. Since the connecting portion 106 is formed of different metals, it is weak against torsional or bending stress.

したがって、上記従来の空気調和機の室内ユニットでは、第１冷媒配管１０３と第２冷媒配管１０４の接続部１０６が破断する危険性が大きいという問題がある。   Therefore, in the indoor unit of the conventional air conditioner, there is a problem that there is a high risk that the connecting portion 106 between the first refrigerant pipe 103 and the second refrigerant pipe 104 is broken.

そこで、この発明の課題は、第１冷媒配管と第２冷媒配管の接続部が破断する危険性を下げることができる空気調和機の室内ユニットを提供することにある。   Then, the subject of this invention is providing the indoor unit of the air conditioner which can reduce the danger that the connection part of 1st refrigerant | coolant piping and 2nd refrigerant | coolant piping will fracture | rupture.

上記課題を解決するため、この発明の空気調和機の室内ユニットは、
ケーシングと、
上記ケーシング内に配置された室内熱交換器と、
一端部が上記室内熱交換器に接続されていると共に、アルミニウムまたはアルミニウム合金で形成された第１冷媒配管と、
一端部が上記第１冷媒配管の他端部に接続されていると共に、銅または銅合金で形成された第２冷媒配管と、
上記第２冷媒配管の他端部に接続された継手部と
を備え、
上記第１冷媒配管は、上記ケーシングの側部に沿うように延在する延在部と、この延在部の上記継手部側の端に連なって上記継手部側に屈曲する屈曲部とを有し、
上記第１冷媒配管の他端部と上記第２冷媒配管の一端部との接続部は、上記第１冷媒配管の上記延在部にあるのではなく、上記屈曲部の上記継手部側の端と上記第２冷媒配管の上記継手部側の端との間にあることを特徴としている。 In order to solve the above problems, an indoor unit of an air conditioner of the present invention is
A casing,
An indoor heat exchanger disposed in the casing;
A first refrigerant pipe formed of aluminum or an aluminum alloy with one end connected to the indoor heat exchanger;
A second refrigerant pipe formed of copper or a copper alloy with one end connected to the other end of the first refrigerant pipe;
A joint connected to the other end of the second refrigerant pipe,
The first refrigerant pipe has an extending portion that extends along the side portion of the casing, and a bent portion that is bent toward the joint portion side and is connected to an end of the extending portion on the joint portion side. And
The connecting portion between the other end portion of the first refrigerant pipe and the one end portion of the second refrigerant pipe is not in the extending portion of the first refrigerant pipe, but is an end of the bent portion on the joint portion side. And the end of the second refrigerant pipe on the joint part side.

上記構成によれば、上記第１冷媒配管の他端部と第２冷媒配管の一端部との接続部は、屈曲部の継手部側の端と第２冷媒配管の継手部側の端との間にある。これにより、上記第１冷媒配管の延在部に対して例えば第２冷媒配管を動かした場合、上記接続部に生じるねじりや曲げの応力は、上記延在部に生じるねじりや曲げの応力に比べて小さい。したがって、上記接続部が破断する危険性を下げることができる。   According to the said structure, the connection part of the other end part of said 1st refrigerant | coolant piping and the one end part of 2nd refrigerant | coolant piping is the edge of the joint part side of a bending part, and the edge of the joint part side of 2nd refrigerant | coolant piping. between. Thereby, for example, when the second refrigerant pipe is moved with respect to the extended portion of the first refrigerant pipe, the twisting and bending stress generated in the connecting portion is compared with the twisting and bending stress generated in the extending portion. Small. Therefore, the risk that the connecting portion breaks can be reduced.

一実施形態の空気調和機の室内ユニットでは、
上記第１冷媒配管の他端部と上記第２冷媒配管の一端部との接続部は、上記屈曲部の上記継手部側の端と上記第２冷媒配管の上記継手部側の端との中間よりも上記継手部側にある。 In the indoor unit of the air conditioner of one embodiment,
The connecting portion between the other end portion of the first refrigerant pipe and the one end portion of the second refrigerant pipe is an intermediate between the end of the bent portion on the joint portion side and the end of the second refrigerant pipe on the joint portion side. More on the joint side.

上記実施形態によれば、上記第１冷媒配管の他端部と第２冷媒配管の一端部との接続部は、屈曲部の継手部側の端と第２冷媒配管の継手部側の端との中間よりも継手部側にあるので、大きなねじりや曲げの応力が接続部に生じる可能性を確実に下げることができる。   According to the said embodiment, the connection part of the other end part of said 1st refrigerant | coolant piping and the one end part of 2nd refrigerant | coolant piping is the end by the side of the joint part of a bending part, and the end by the side of the joint part of 2nd refrigerant | coolant piping. Therefore, the possibility that a large torsional or bending stress is generated in the connecting portion can be reliably reduced.

この発明の空気調和機は、ケーシングと、このケーシング内に配置された室内熱交換器と、一端部が室内熱交換器に接続されていると共に、アルミニウムまたはアルミニウム合金で形成された第１冷媒配管と、一端部が第１冷媒配管の他端部に接続されていると共に、銅または銅合金で形成された第２冷媒配管と、第２冷媒配管の他端部に接続された継手部とを備え、第１冷媒配管は、ケーシングの側部に沿うように延在する延在部と、この延在部の継手部側の端に連なって継手部側に屈曲する屈曲部とを有し、第１冷媒配管の他端部と第２冷媒配管の一端部との接続部は、屈曲部の継手部側の端と第２冷媒配管の継手部側の端との間にあるので、第１冷媒配管の延在部に対して例えば第２冷媒配管を動かしても、接続部に生じるねじりや曲げの応力を小さくすることができる。したがって、上記接続部が破断する危険性を下げることができる。   An air conditioner according to the present invention includes a casing, an indoor heat exchanger disposed in the casing, a first refrigerant pipe made of aluminum or an aluminum alloy, and having one end connected to the indoor heat exchanger. And a first refrigerant pipe connected to the other end of the first refrigerant pipe, a second refrigerant pipe formed of copper or a copper alloy, and a joint connected to the other end of the second refrigerant pipe. The first refrigerant pipe has an extending part extending along the side part of the casing, and a bent part that is bent to the joint part side and is connected to an end of the extending part on the joint part side, Since the connecting portion between the other end portion of the first refrigerant pipe and the one end portion of the second refrigerant pipe is between the end of the bent portion on the joint portion side and the end of the second refrigerant pipe on the joint portion side, Even if, for example, the second refrigerant pipe is moved with respect to the extended part of the refrigerant pipe, the torsion or bending generated in the connection part It is possible to reduce the stress. Therefore, the risk that the connecting portion breaks can be reduced.

図１はこの発明の一実施の形態の空気調和機の室内ユニットの概略斜視図である。FIG. 1 is a schematic perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention. 図２は上記室内ユニットの他の概略斜視図である。FIG. 2 is another schematic perspective view of the indoor unit. 図３は上記室内ユニットの室内熱交換器およびその周辺部の背面図である。FIG. 3 is a rear view of the indoor heat exchanger of the indoor unit and its peripheral part. 図４は上記室内ユニットの他の概略斜視図である。FIG. 4 is another schematic perspective view of the indoor unit. 図５は従来の空気調和機の室内ユニットの構成を説明するための模式図である。FIG. 5 is a schematic diagram for explaining the configuration of an indoor unit of a conventional air conditioner.

以下、この発明の空気調和機を図示の実施の形態により詳細に説明する。   Hereinafter, the air conditioner of this invention is demonstrated in detail by embodiment of illustration.

図１は、この発明の一実施形態の空気調和機の室内ユニットを正面側の斜め下方から見た概略斜視図である。また、図２は、上記室内ユニットを背面側の斜め上方から見た概略斜視図である。   FIG. 1 is a schematic perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention as viewed obliquely from the front side. FIG. 2 is a schematic perspective view of the indoor unit as viewed obliquely from the rear side.

上記室内ユニットは、図１，図２に示すように、ケーシング１と、このケーシング１内に配置された室内熱交換器２(図３に示す)とを備える。このケーシング１の上部には、室内空気を吸い込む吸込口１ａが設けられている。一方、ケーシング１の下部には、室内熱交換器２を通過した室内空気を吹き出す吹出口１ｂが設けられている。また、吹出口１ｂには風向羽根１２が取り付けられている。また、室内熱交換器２の下流側、かつ、吹出口１ｂの上流側には、クロスフローファン(図示せず)が配置されている。なお、この空気調和機では、図示しない室外ユニットの圧縮機、四路弁、室外熱交換器および膨張手段(例えば膨張弁)と、室内熱交換器２とが、環状に接続されて、冷媒回路の主要部を構成している。   As shown in FIGS. 1 and 2, the indoor unit includes a casing 1 and an indoor heat exchanger 2 (shown in FIG. 3) disposed in the casing 1. The upper portion of the casing 1 is provided with a suction port 1a for sucking room air. On the other hand, at the lower part of the casing 1, there is provided an air outlet 1 b that blows out indoor air that has passed through the indoor heat exchanger 2. Moreover, the wind direction blade | wing 12 is attached to the blower outlet 1b. A cross flow fan (not shown) is disposed on the downstream side of the indoor heat exchanger 2 and on the upstream side of the air outlet 1b. In this air conditioner, a compressor of an outdoor unit, not shown, a four-way valve, an outdoor heat exchanger and an expansion means (for example, an expansion valve), and the indoor heat exchanger 2 are connected in a ring shape to form a refrigerant circuit. The main part of

図３は上記室内熱交換器２およびその周辺部の背面図である。   FIG. 3 is a rear view of the indoor heat exchanger 2 and its peripheral part.

上記室内熱交換器２は、熱交換部３と、この熱交換部３を貫通する複数の伝熱管４，４，…とを有する。この熱交換部３および各伝熱管４は、それぞれ、アルミニウムまたはアルミニウム合金で形成されている。   The indoor heat exchanger 2 includes a heat exchanging unit 3 and a plurality of heat transfer tubes 4, 4,... Penetrating the heat exchanging unit 3. The heat exchange unit 3 and each heat transfer tube 4 are each formed of aluminum or an aluminum alloy.

また、上記室内ユニットは、液用第１冷媒配管５と、この液用第１冷媒配管５と連通する液用第２冷媒配管６と、ガス用第１冷媒配管７と、このガス用第１冷媒配管７と連通するガス用第２冷媒配管８と、液用フレアユニオン９と、ガス用フレアユニオン１０とを備えている。この液用第１冷媒配管５およびガス用第１冷媒配管７は、それぞれ、アルミニウムまたはアルミニウム合金で形成されている。一方、液用第２冷媒配管６およびガス用第２冷媒配管８は、それぞれ、銅または銅合金で形成されている。なお、液用第１冷媒配管５およびガス用第１冷媒配管７は、第１冷媒配管の一例である。また、液用第２冷媒配管６およびガス用第２冷媒配管８は、第２冷媒配管の一例である。また、液用フレアユニオン９およびガス用フレアユニオン１０は、継手部の一例である。   The indoor unit includes a liquid first refrigerant pipe 5, a liquid second refrigerant pipe 6 communicating with the liquid first refrigerant pipe 5, a gas first refrigerant pipe 7, and the gas first refrigerant pipe 5. A gas second refrigerant pipe 8 communicating with the refrigerant pipe 7, a liquid flare union 9, and a gas flare union 10 are provided. The liquid first refrigerant pipe 5 and the gas first refrigerant pipe 7 are each formed of aluminum or an aluminum alloy. On the other hand, the liquid second refrigerant pipe 6 and the gas second refrigerant pipe 8 are each formed of copper or a copper alloy. The liquid first refrigerant pipe 5 and the gas first refrigerant pipe 7 are examples of the first refrigerant pipe. The liquid second refrigerant pipe 6 and the gas second refrigerant pipe 8 are examples of the second refrigerant pipe. The liquid flare union 9 and the gas flare union 10 are examples of joint portions.

上記液用第１冷媒配管５は、分流合流器１１を介して伝熱管４の一端部に接続されている。この液用第１冷媒配管５は、ケーシング１の側部に沿って延在する側部側直線部５ａと、この側部側直線部５ａの液用フレアユニオン９側の端に連なって液用フレアユニオン９側に屈曲する屈曲部５ｂと、この屈曲部５ｂの液用フレアユニオン９側の端に連なってケーシング１の下部に沿って延在する下部側直線部５ｃとを有する。なお、側部側直線部５ａは延在部の一例である。   The liquid first refrigerant pipe 5 is connected to one end of the heat transfer tube 4 via a branching / merging device 11. The liquid first refrigerant pipe 5 is connected to the side linear portion 5a extending along the side of the casing 1 and the liquid flare union 9 side end of the side linear portion 5a. It has a bent portion 5b bent to the flare union 9 side, and a lower straight portion 5c extending along the lower portion of the casing 1 connected to the end of the bent portion 5b on the liquid flare union 9 side. In addition, the side part side straight part 5a is an example of an extension part.

一方、上記液用第２冷媒配管６の一端部(下部側直線部５ｃ側の端部)は、液用第１冷媒配管５の他端部(液用第２冷媒配管６側の端部)に接続されている。より詳しくは、下部側直線部５ｃの液用第２冷媒配管６側の端部は、下部側直線部５ｃの他の部分よりも拡径されており、液用第２冷媒配管６の一端部が挿入される。そして、下部側直線部５ｃの液用第２冷媒配管６側の端部は、液用第２冷媒配管６の一端部との間のろう材により、液用第２冷媒配管６の一端部に固定される。また、下部側直線部５ｃの液用第２冷媒配管６側の端部およびこの周辺部は熱収縮チューブ内に挿入して露出しないようにする。また、液用第２冷媒配管６の他端部には液用フレアユニオン９が接続されている。   On the other hand, one end of the liquid second refrigerant pipe 6 (the end on the lower straight part 5c side) is the other end of the liquid first refrigerant pipe 5 (the end on the liquid second refrigerant pipe 6 side). It is connected to the. More specifically, the end of the lower-side straight portion 5c on the liquid second refrigerant pipe 6 side has a larger diameter than the other part of the lower-side straight portion 5c, and one end of the liquid-use second refrigerant pipe 6 Is inserted. And the edge part by the side of the 2nd refrigerant | coolant piping 6 for liquids of the lower side straight part 5c is made into the one end part of the 2nd refrigerant | coolant piping 6 for liquids by the brazing material between one end part of the 2nd refrigerant | coolant piping 6 for liquids. Fixed. Further, the end of the lower straight portion 5c on the liquid second refrigerant pipe 6 side and its peripheral portion are inserted into the heat shrinkable tube so as not to be exposed. A liquid flare union 9 is connected to the other end of the liquid second refrigerant pipe 6.

すなわち、上記液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との間に配置されている。より正確に言うと、上記接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも液用フレアユニオン９側に配置されている。   That is, the connecting portion between the other end of the first liquid refrigerant pipe 5 and one end of the second liquid refrigerant pipe 6 is connected to the end of the bent portion 5b on the liquid flare union 9 side and the second liquid refrigerant pipe. 6 and the liquid flare union 9 side end. To be more precise, the connecting portion has a liquid flare union 9 that is intermediate between the end of the bent portion 5b on the liquid flare union 9 side and the end of the liquid second refrigerant pipe 6 on the liquid flare union 9 side. Arranged on the side.

上記ガス用第１冷媒配管７は、分流合流器(図示せず)を介して他の伝熱管４の一端部に接続されている。このガス用第１冷媒配管７は、ケーシング１の側部に沿って延在する側部側直線部７ａと、この側部側直線部７ａのガス用フレアユニオン１０側の端に連なってガス用フレアユニオン１０側に屈曲する屈曲部７ｂと、この屈曲部７ｂのガス用フレアユニオン１０側の端に連なってケーシング１の下部に沿って延在する下部側直線部７ｃとを有する。なお、側部側直線部７ａは延在部の一例である。   The gas first refrigerant pipe 7 is connected to one end of another heat transfer pipe 4 via a branching / merging device (not shown). The gas first refrigerant pipe 7 is connected to the side-side straight portion 7a extending along the side portion of the casing 1 and the end of the side-side straight portion 7a on the gas flare union 10 side. A bent portion 7b that is bent toward the flare union 10 side and a lower-side straight portion 7c that extends along the lower portion of the casing 1 connected to the end of the bent portion 7b on the gas flare union 10 side. In addition, the side part side linear part 7a is an example of an extension part.

一方、上記ガス用第２冷媒配管８の一端部(下部側直線部７ｃ側の端部)は、ガス用第１冷媒配管７の他端部(ガス用第２冷媒配管８側の端部)に接続されている。より詳しくは、下部側直線部７ｃのガス用第２冷媒配管８側の端部は、下部側直線部７ｃの他の部分よりも拡径されており、ガス用第２冷媒配管８の一端部が挿入される。そして、下部側直線部７ｃのガス用第２冷媒配管８側の端部は、ガス用第２冷媒配管８の一端部との間のろう材により、ガス用第２冷媒配管８の一端部に固定される。また、下部側直線部７ｃのガス用第２冷媒配管８側の端部およびこの周辺部は熱収縮チューブ内に挿入して露出しないようにする。また、ガス用第２冷媒配管８の他端部にはガス用フレアユニオン１０が接続されている。   On the other hand, one end of the gas second refrigerant pipe 8 (the end on the lower straight part 7c side) is the other end of the gas first refrigerant pipe 7 (the end on the gas second refrigerant pipe 8 side). It is connected to the. More specifically, the end portion of the lower straight portion 7c on the gas second refrigerant pipe 8 side has a larger diameter than the other portion of the lower straight portion 7c, and one end portion of the gas second refrigerant pipe 8 Is inserted. The end of the lower straight portion 7c on the gas second refrigerant pipe 8 side is connected to one end of the gas second refrigerant pipe 8 by a brazing material between the gas second refrigerant pipe 8 and one end thereof. Fixed. Further, the end portion of the lower straight portion 7c on the gas second refrigerant pipe 8 side and its peripheral portion are inserted into the heat shrinkable tube so as not to be exposed. A gas flare union 10 is connected to the other end of the second gas refrigerant pipe 8.

すなわち、上記ガス用第１冷媒配管７の他端部とガス用第２冷媒配管８の一端部との接続部は、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との間に配置されている。より正確に言うと、上記接続部は、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との中間よりもガス用フレアユニオン１０側に配置されている。   That is, the connecting portion between the other end portion of the first gas refrigerant pipe 7 and one end portion of the second gas refrigerant pipe 8 is the end of the bent portion 7b on the gas flare union 10 side and the second gas refrigerant pipe. 8 and the gas flare union 10 side end. More precisely, the connecting portion is configured so that the gas flare union 10 is more intermediate than the end of the bent portion 7b on the gas flare union 10 side and the end of the gas second refrigerant pipe 8 on the gas flare union 10 side. Arranged on the side.

上記構成の空気調和機の室内ユニットによれば、据え付け時、液用第１冷媒配管５の下部側直線部５ｃと液用第２冷媒配管６とを、図４に示すように、液用第１冷媒配管５の側部側直線部５ａに近づける場合がある。この場合、側部側直線部５ａにはねじりや曲げの応力が生じるが、互いに異なる金属で形成された接続部が側部側直線部５ａに配置されていないので、側部側直線部５ａの破断の危険性は低い。   According to the indoor unit of the air conditioner configured as described above, when installed, the lower straight portion 5c of the liquid first refrigerant pipe 5 and the liquid second refrigerant pipe 6 are connected to the liquid first refrigerant pipe 5 as shown in FIG. In some cases, the refrigerant pipe 5 may be brought closer to the side straight portion 5a. In this case, although stress of twisting or bending occurs in the side portion side straight portion 5a, since the connecting portions formed of different metals are not arranged in the side portion straight portion 5a, the side portion straight portion 5a The risk of breakage is low.

また、その場合、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との間の部分に生じるねじりや曲げの応力は、液用第１冷媒配管５の側部側直線部５ａに生じるねじりや曲げの応力よりも小さい。したがって、液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部が、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との間に配置されているので、この接続部の破断の危険性を下げることができる。   In that case, the torsional or bending stress generated in the portion between the end of the bent portion 5b on the liquid flare union 9 side and the end of the liquid second refrigerant pipe 6 on the liquid flare union 9 side is It is smaller than the torsional or bending stress produced in the side part side straight part 5a of the first refrigerant pipe 5. Accordingly, the connecting portion between the other end of the liquid first refrigerant pipe 5 and one end of the liquid second refrigerant pipe 6 is the end of the bent portion 5b on the liquid flare union 9 side and the liquid second refrigerant pipe 6. Since it is disposed between the liquid flare union 9 and the end on the liquid flare union 9 side, the risk of breakage of the connecting portion can be reduced.

また、上記液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも液用フレアユニオン９側に配置されている。これにより、大きなねじりや曲げの応力が上記接続部に生じる可能性を確実に下げることができる。   The connecting portion between the other end of the first liquid refrigerant pipe 5 and one end of the second liquid refrigerant pipe 6 is connected to the end of the bent portion 5b on the liquid flare union 9 side and the second liquid refrigerant pipe. 6 is arranged closer to the liquid flare union 9 side than the middle of the liquid flare union 9 side. Thereby, the possibility that a large torsional or bending stress is generated in the connecting portion can be reliably reduced.

また、上記ガス用第１冷媒配管７の下部側直線部７ｃとガス用第２冷媒配管８とを、ガス用第１冷媒配管７の側部側直線部７ａに近づけても、上述した作用効果と同様の作用効果がガス用第１冷媒配管７およびガス用第２冷媒配管８で得られる。   The above-described effects can be obtained even when the lower straight portion 7c of the gas first refrigerant pipe 7 and the second refrigerant pipe 8 for gas are brought closer to the side straight portion 7a of the first refrigerant pipe 7 for gas. The same effect as that of the first refrigerant pipe 7 for gas and the second refrigerant pipe 8 for gas is obtained.

また、上記熱交換部３および各伝熱管４は、それぞれ、アルミニウムまたはアルミニウム合金で形成されているので、製造コストを低減できる。   Moreover, since the said heat exchange part 3 and each heat exchanger tube 4 are each formed with aluminum or aluminum alloy, manufacturing cost can be reduced.

上記実施形態では、液用第１冷媒配管５の他端部と液用第２冷媒配管６の一端部との接続部は、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも液用フレアユニオン９側に配置されていたが、屈曲部５ｂの液用フレアユニオン９側の端と液用第２冷媒配管６の液用フレアユニオン９側の端との中間よりも屈曲部５ｂ側に配置されるようにしてもよい。   In the above embodiment, the connection portion between the other end of the liquid first refrigerant pipe 5 and the one end of the liquid second refrigerant pipe 6 is the end of the bent portion 5b on the liquid flare union 9 side and the liquid second. The refrigerant pipe 6 is disposed on the liquid flare union 9 side rather than the middle of the liquid flare union 9 side end, but the liquid flare union 9 side end of the bent part 5b and the liquid second refrigerant pipe 6 are disposed. You may make it arrange | position to the bending part 5b side rather than the intermediate | middle with the end by the side of the liquid flare union 9 side.

上記実施形態では、ガス用第１冷媒配管７の他端とガス用第２冷媒配管８の一端との接続部は、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との中間よりもガス用フレアユニオン１０側に配置されていたが、屈曲部７ｂのガス用フレアユニオン１０側の端とガス用第２冷媒配管８のガス用フレアユニオン１０側の端との中間よりも屈曲部７ｂ側に配置されるようにしてもよい。   In the above embodiment, the connecting portion between the other end of the gas first refrigerant pipe 7 and the one end of the gas second refrigerant pipe 8 is the end of the bent portion 7b on the gas flare union 10 side and the gas second refrigerant pipe. The gas flare union 10 side of the gas flare union 10 side of the gas flare union 10 side of the gas, and the gas flare union 10 side end of the bent portion 7b and the gas in the gas second refrigerant pipe 8 You may make it arrange | position at the bending part 7b side rather than the intermediate | middle with the end by the side of the flare union 10 for use.

上記実施形態において、液用第１冷媒配管５、液用第２冷媒配管６、ガス用第１冷媒配管７およびガス用第２冷媒配管８を、断熱材で覆って一体にしてもよい。   In the above-described embodiment, the liquid first refrigerant pipe 5, the liquid second refrigerant pipe 6, the gas first refrigerant pipe 7, and the gas second refrigerant pipe 8 may be covered with a heat insulating material and integrated.

この発明の具体的な実施形態について説明したが、この発明は上記実施形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。   Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention.

１ ケーシング
１ａ 吸込口
１ｂ 吹出口
２ 室内熱交換器
３ 熱交換部
４ 伝熱管
５ 液用第１冷媒配管
５ａ 側部側直線部
５ｂ 屈曲部
５ｃ 下部側直線部
６ 液用第２冷媒配管
７ ガス用第１冷媒配管
７ａ 側部側直線部
７ｂ 屈曲部
７ｃ 下部側直線部
８ ガス用第２冷媒配管
９ 液用フレアユニオン
１０ ガス用フレアユニオン DESCRIPTION OF SYMBOLS 1 Casing 1a Inlet 1b Outlet 2 Indoor heat exchanger 3 Heat exchange part 4 Heat transfer pipe 5 Liquid first refrigerant pipe 5a Side part side straight part 5b Bend part 5c Lower side straight part 6 Liquid second refrigerant pipe 7 Gas First refrigerant piping 7a side-side straight portion 7b bent portion 7c lower-side straight portion 8 second refrigerant piping for gas 9 flare union for liquid 10 flare union for gas

Claims (2)

ケーシング(１)と、
上記ケーシング(１)内に配置された室内熱交換器(２)と、
一端部が上記室内熱交換器(２)に接続されていると共に、アルミニウムまたはアルミニウム合金で形成された第１冷媒配管(５，７)と、
一端部が上記第１冷媒配管(５，７)の他端部に接続されていると共に、銅または銅合金で形成された第２冷媒配管(６，８)と、
上記第２冷媒配管(６，８)の他端部に接続された継手部(９，１０)と
を備え、
上記第１冷媒配管(５，７)は、上記ケーシング(１)の側部に沿うように延在する延在部(５ａ，７ａ)と、この延在部(５ａ，７ａ)の上記継手部(９，１０)側の端に連なって上記継手部(９，１０)側に屈曲する屈曲部(５ｂ，７ｂ)とを有し、
上記第１冷媒配管(５，７)の他端部と上記第２冷媒配管(６，８)の一端部との接続部は、上記屈曲部(５ｂ，７ｂ)の上記継手部(９，１０)側の端と上記第２冷媒配管(６，８)の上記継手部(９，１０)側の端との間にあることを特徴とする空気調和機の室内ユニット。 A casing (1);
An indoor heat exchanger (2) disposed in the casing (1);
One end of which is connected to the indoor heat exchanger (2), and a first refrigerant pipe (5, 7) formed of aluminum or aluminum alloy;
One end of which is connected to the other end of the first refrigerant pipe (5, 7), and a second refrigerant pipe (6, 8) formed of copper or copper alloy;
A joint (9, 10) connected to the other end of the second refrigerant pipe (6, 8);
The first refrigerant pipe (5, 7) includes an extended portion (5a, 7a) extending along the side portion of the casing (1) and the joint portion of the extended portion (5a, 7a). A bent portion (5b, 7b) that continues to the end on the (9, 10) side and bends toward the joint portion (9, 10) side;
The connecting portion between the other end of the first refrigerant pipe (5, 7) and one end of the second refrigerant pipe (6, 8) is the joint (9, 10) of the bent portion (5b, 7b). ) Side end and the joint portion (9, 10) side end of the second refrigerant pipe (6, 8). 請求項１に記載の空気調和機の室内ユニットにおいて、
上記第１冷媒配管(５，７)の他端部と上記第２冷媒配管(６，８)の一端部との接続部は、上記屈曲部(５ｂ，７ｂ)の上記継手部(９，１０)側の端と上記第２冷媒配管(６，８)の上記継手部(９，１０)側の端との中間よりも上記継手部(９，１０)側にあることを特徴とする空気調和機の室内ユニット。 In the indoor unit of the air conditioner according to claim 1,
The connecting portion between the other end of the first refrigerant pipe (5, 7) and one end of the second refrigerant pipe (6, 8) is the joint (9, 10) of the bent portion (5b, 7b). ) Side end and the joint portion (9, 10) side of the second refrigerant pipe (6, 8) between the end of the joint portion (9, 10) side and the air conditioning, Indoor unit of the machine.
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CN201580004692.XA CN105917173B (en) 2014-01-30 2015-01-06 The indoor unit of air conditioner
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