JP7306222B2 - Cooling/heating switching device - Google Patents

Cooling/heating switching device Download PDF

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JP7306222B2
JP7306222B2 JP2019196785A JP2019196785A JP7306222B2 JP 7306222 B2 JP7306222 B2 JP 7306222B2 JP 2019196785 A JP2019196785 A JP 2019196785A JP 2019196785 A JP2019196785 A JP 2019196785A JP 7306222 B2 JP7306222 B2 JP 7306222B2
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opening
circuit board
housing
indoor unit
control circuit
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JP2021071214A (en
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魁斗 矢野
悠 木村
悠太 田中
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Fujitsu General Ltd
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Description

本発明は、冷暖切換装置に関する。 The present invention relates to a cooling/heating switching device.

複数の室内機及び室外機を備える空気調和装置（冷凍サイクル装置）において、複数の室内機の冷房及び暖房の稼働状態をそれぞれ切り換えるための集合型冷暖切換装置が知られている。この種の冷暖切換装置には、複数の室内機及び室外機に接続された複数の冷媒配管と、複数の冷媒配管に設けられた複数の開閉弁と、を有する配管部と、複数の開閉弁をそれぞれ開閉する複数の開閉機構を有する駆動部と、複数の開閉機構を制御する制御部と、配管部、駆動部及び制御部が収容される筐体と、を備えるものがある。制御部は、複数の開閉機構を制御すると共に複数の開閉機構に電力を供給するための複数の回路基板と、複数の回路基板が収容される基板収容空間と、を有する。 2. Description of the Related Art In an air conditioner (refrigerating cycle device) provided with a plurality of indoor units and an outdoor unit, there is known a collective cooling/heating switching device for switching the operating states of cooling and heating of the plurality of indoor units. This type of cooling/heating switching device includes a piping section having a plurality of refrigerant pipes connected to a plurality of indoor units and an outdoor unit, and a plurality of on-off valves provided in the plurality of refrigerant pipes, and a plurality of on-off valves. , a control unit for controlling the plurality of opening/closing mechanisms, and a housing housing the piping unit, the driving unit, and the control unit. The control unit has a plurality of circuit boards for controlling the plurality of opening/closing mechanisms and supplying electric power to the plurality of opening/closing mechanisms, and a substrate accommodation space in which the plurality of circuit substrates are accommodated.

特開２０１４－１６３６５７号公報JP 2014-163657 A

ところで、上述の冷暖切換装置の制御部は、１つの室内機に接続された２つの冷媒配管を有する１つの冷媒循環回路毎に、１つの回路基板を備える。このため、筐体内に占める基板収容空間が大きく、装置全体及び筐体が大型化する問題がある。この問題は、冷暖切換装置に接続される室内機の個数が増えるのに伴って顕著になる。そこで、回路基板を制御回路基板と電源回路基板とに分けて制御部に収容することが提案されている。 By the way, the control unit of the cooling/heating switching device described above includes one circuit board for each refrigerant circulation circuit having two refrigerant pipes connected to one indoor unit. For this reason, there is a problem that the board accommodation space occupied in the housing is large, and the size of the entire device and the housing is increased. This problem becomes more pronounced as the number of indoor units connected to the cooling/heating switching device increases. Therefore, it has been proposed to separate the circuit boards into a control circuit board and a power supply circuit board and accommodate them in the control unit.

しかし、このような構造の場合、複数の室内機に対応する複数の開閉弁、複数の制御回路基板及び複数の電源回路基板の中から、保守対象となる任意の１つの室内機に対応する、複数の開閉弁、制御回路基板及び電源回路基板をそれぞれ見付け出すと共に、１つの室内機に対応する各開閉弁、制御回路基板及び電源回路基板を相互に確認しながら保守作業を行うことになる。このため、冷暖切換装置の保守作業が煩雑になる。 However, in the case of such a structure, among a plurality of on-off valves, a plurality of control circuit boards, and a plurality of power supply circuit boards corresponding to a plurality of indoor units, it corresponds to any one indoor unit to be maintained. A plurality of on-off valves, control circuit boards, and power supply circuit boards are found, and maintenance work is performed while mutually confirming each on-off valve, control circuit board, and power supply circuit board corresponding to one indoor unit. Therefore, the maintenance work of the cooling/heating switching device becomes complicated.

開示の技術は、上記に鑑みてなされたものであって、駆動部及び制御部を保守する作業性を向上することができる冷暖切換装置を提供することを目的とする。 The disclosed technology has been made in view of the above, and an object thereof is to provide a cooling/heating switching device capable of improving the workability of maintaining the driving unit and the control unit.

本願の開示する冷暖切換装置の一態様は、複数の室内機及び少なくとも１つの室外機に接続された複数の冷媒配管と、複数の冷媒配管に設けられた複数の開閉弁と、を有する配管部と、複数の開閉弁をそれぞれ開閉する複数の開閉機構を有する駆動部と、複数の開閉機構を制御する制御部と、配管部、駆動部及び制御部が収容される筐体と、を備え、制御部は、複数の開閉機構を制御する複数の制御回路基板と、複数の開閉機構に電力を供給するための複数の電源回路基板と、筐体内に設けられて複数の制御回路基板及び複数の電源回路基板が収容される基板収容空間と、を有し、基板収容空間には、複数の制御回路基板が第１方向に沿って配列され、複数の電源回路基板が、複数の制御回路基板に積層されて第１方向に沿って配列される。１つの室内機に対応する複数の開閉機構と、当該１つの室内機に対応する１つの制御回路基板及び１つの電源回路基板は、筐体内の第１方向と直交する第２方向に互いに重なるように配置される。１つの制御回路基板は、２つの室内機に対応する複数の開閉弁を制御し、１つの電源回路基板は、４つの室内機に対応する複数の開閉弁をそれぞれ開閉する複数の開閉機構に電力を供給し、１つの電源回路基板は、第１方向に対して２つの制御回路基板に跨るように当該２つの制御回路基板の第２方向に積層され、第２方向から見たときに第１方向の位置が１つの電源回路基板及び２つの制御回路基板と隣り合うように、４つの室内機に対応する複数の開閉機構が筐体内に配置される。 One aspect of the cooling/heating switching device disclosed in the present application is a piping unit having a plurality of refrigerant pipes connected to a plurality of indoor units and at least one outdoor unit, and a plurality of on-off valves provided in the plurality of refrigerant pipes. a driving unit having a plurality of opening and closing mechanisms for opening and closing a plurality of opening and closing valves; a control unit for controlling the plurality of opening and closing mechanisms; The control unit includes a plurality of control circuit boards for controlling the plurality of opening/closing mechanisms, a plurality of power supply circuit boards for supplying power to the plurality of opening/closing mechanisms, a plurality of control circuit boards provided in the housing, and a plurality of a board accommodation space in which the power supply circuit boards are accommodated, wherein the plurality of control circuit boards are arranged in the board accommodation space along the first direction, and the plurality of power supply circuit boards are arranged on the plurality of control circuit boards. They are stacked and arranged along a first direction. A plurality of opening/closing mechanisms corresponding to one indoor unit, and one control circuit board and one power supply circuit board corresponding to the one indoor unit are arranged so as to overlap each other in a second direction orthogonal to the first direction in the housing. placed in One control circuit board controls a plurality of on-off valves corresponding to two indoor units, and one power supply circuit board supplies power to a plurality of opening/closing mechanisms that respectively open and close a plurality of on-off valves corresponding to four indoor units. , and one power supply circuit board is laminated in the second direction of the two control circuit boards so as to straddle the two control circuit boards in the first direction, and when viewed from the second direction, the first A plurality of opening/closing mechanisms corresponding to the four indoor units are arranged in the housing such that the directional positions are adjacent to one power supply circuit board and two control circuit boards.

本願の開示する冷暖切換装置の一態様によれば、駆動部及び制御部を保守する作業性を向上することができる。 According to one aspect of the cooling/heating switching device disclosed in the present application, it is possible to improve the workability of maintaining the drive unit and the control unit.

図１は、実施例の冷暖切換装置を備える空気調和装置を示す概略図である。FIG. 1 is a schematic diagram showing an air conditioner provided with a cooling/heating switching device of an embodiment. 図２は、実施例の冷暖切換装置を示す斜視図である。FIG. 2 is a perspective view showing the cooling/heating switching device of the embodiment. 図３は、実施例の冷暖切換装置を下側から示す斜視図である。FIG. 3 is a perspective view showing the cooling/heating switching device of the embodiment from below. 図４は、実施例の冷暖切換装置における筐体の内部を示す斜視図である。FIG. 4 is a perspective view showing the inside of the housing in the cooling/heating switching device of the embodiment. 図５は、実施例の冷暖切換装置における筐体の内部を示す斜視図である。FIG. 5 is a perspective view showing the inside of the housing in the cooling/heating switching device of the embodiment. 図６は、実施例の冷暖切換装置を示す冷媒回路図である。FIG. 6 is a refrigerant circuit diagram showing the cooling/heating switching device of the embodiment. 図７は、実施例の冷暖切換装置の配管部及び駆動部を示す側面図である。FIG. 7 is a side view showing the piping section and driving section of the cooling/heating switching device of the embodiment. 図８は、実施例における駆動部の伝熱部材を示す正面図である。FIG. 8 is a front view showing the heat transfer member of the driving section in the example. 図９は、実施例における駆動部の伝熱部材の変形例を示す正面図である。FIG. 9 is a front view showing a modification of the heat transfer member of the drive section in the embodiment. 図１０は、実施例の冷暖切換装置の制御部を示す正面図である。FIG. 10 is a front view showing the control section of the cooling/heating switching device of the embodiment. 図１１は、実施例の冷暖切換装置の制御部において電源回路基板を回動した状態を示す斜視図である。FIG. 11 is a perspective view showing a state in which the power supply circuit board is rotated in the control section of the cooling/heating switching device of the embodiment. 図１２は、実施例における制御部の支持台及び第１基板ホルダを示す正面図である。FIG. 12 is a front view showing the support base of the control unit and the first substrate holder in the example. 図１３は、実施例における制御部の第１基板ホルダを示す斜視図である。FIG. 13 is a perspective view showing the first substrate holder of the controller in the example. 図１４は、実施例における第１基板ホルダの要部を説明するための斜視図である。FIG. 14 is a perspective view for explaining a main part of the first substrate holder in the example. 図１５は、実施例における第１基板ホルダの要部を拡大して示す斜視図である。FIG. 15 is a perspective view showing an enlarged main part of the first substrate holder in the example. 図１６は、実施例における支持台の要部を拡大して示す斜視図である。FIG. 16 is an enlarged perspective view showing the main part of the support base in the embodiment. 図１７は、実施例における開閉機構、制御回路基板、電源回路基板の各位置を説明するための分解斜視図である。FIG. 17 is an exploded perspective view for explaining positions of an opening/closing mechanism, a control circuit board, and a power circuit board in the embodiment. 図１８は、実施例における駆動部に設けられた取付け金具を示す斜視図である。FIG. 18 is a perspective view showing a mounting bracket provided on the driving portion in the example. 図１９は、実施例における取付け金具を拡大して示す斜視図である。FIG. 19 is a perspective view showing an enlarged mounting bracket in the embodiment. 図２０は、実施例における筐体の要部を示す縦断面図である。FIG. 20 is a vertical cross-sectional view showing the essential parts of the housing in the example. 図２１は、実施例において駆動部及び制御部を保守する状態を示す正面図である。FIG. 21 is a front view showing a state in which the driving section and the control section are maintained in the embodiment. 図２２は、実施例における開閉機構の識別ラベル、配置ラベル及び電源回路基板のコネクタラベルを示す正面図である。FIG. 22 is a front view showing an identification label of an opening/closing mechanism, an arrangement label, and a connector label of a power supply circuit board in the embodiment. 図２３は、実施例における制御回路基板のコネクタラベルを示す正面図である。FIG. 23 is a front view showing the connector label of the control circuit board in the example.

以下に、本願の開示する冷暖切換装置の実施例を図面に基づいて詳細に説明する。なお、以下の実施例によって、本願の開示する冷暖切換装置が限定されるものではない。 Hereinafter, embodiments of the cooling/heating switching device disclosed in the present application will be described in detail based on the drawings. The cooling/heating switching device disclosed in the present application is not limited to the following embodiments.

（空気調和装置の構成）
図１は、実施例の冷暖切換装置を備える空気調和装置を示す概略図である。図１に示すように、実施例の冷暖切換装置１は、空気調和装置２に設けられている。図１は、実施例の冷暖切換装置１が設けられている空気調和装置２を示す概略図である。空気調和装置２は、冷暖切換装置１と、複数の室外機３－１～３－２と、複数の室内機５－１～５－４と、低圧ガス管６と、高圧ガス管７と、液管８と、を備える。複数の室外機３－１～３－２のうち、室外機３－１は、低圧ガス管６、高圧ガス管７及び液管８を介して冷暖切換装置１に接続されている。 (Configuration of air conditioner)
FIG. 1 is a schematic diagram showing an air conditioner provided with a cooling/heating switching device of an embodiment. As shown in FIG. 1 , a cooling/heating switching device 1 of the embodiment is provided in an air conditioner 2 . FIG. 1 is a schematic diagram showing an air conditioner 2 provided with a cooling/heating switching device 1 of the embodiment. The air conditioner 2 includes a cooling/heating switching device 1, a plurality of outdoor units 3-1 to 3-2, a plurality of indoor units 5-1 to 5-4, a low pressure gas pipe 6, a high pressure gas pipe 7, a liquid tube 8; Out of the plurality of outdoor units 3-1 to 3-2, the outdoor unit 3-1 is connected to the cooling/heating switching device 1 via a low pressure gas pipe 6, a high pressure gas pipe 7 and a liquid pipe 8.

室外機３－１は、図示しない圧縮機、室外熱交換器及び四方弁を備える。圧縮機の一端は、低圧ガス管６に接続されており、圧縮機の他端は、高圧ガス管７に接続されている。圧縮機は、低圧ガス管６を介して室外機３－１に供給される低圧気相冷媒を圧縮することにより高圧気相冷媒を生成し、高圧気相冷媒を高圧ガス管７に吐出する。室外熱交換器の一端は、液管８に接続されており、室外熱交換器の他端は、四方弁に接続されている。四方弁は、高圧ガス管７及び低圧ガス管６に接続されている。四方弁は、第１モードと第２モードとに切り換えられる。四方弁は、第１モードに切り換えられたときに、低圧ガス管６を高圧ガス管７及び室内熱交換機に接続せずに、高圧ガス管７を室内熱交換機に接続する。四方弁は、第２モードに切り換えられたときに、高圧ガス管７を低圧ガス管６及び室内熱交換機に接続せずに、低圧ガス管６を室内熱交換機に接続する。複数の室外機３－１～３－２のうち、室外機３－１と異なる室外機３－２も、室外機３－１と同様に形成されており、低圧ガス管６、高圧ガス管７及び液管８を介して冷暖切換装置１に接続されている。 The outdoor unit 3-1 includes a compressor, an outdoor heat exchanger and a four-way valve (not shown). One end of the compressor is connected to a low pressure gas pipe 6 and the other end of the compressor is connected to a high pressure gas pipe 7 . The compressor generates high-pressure gas-phase refrigerant by compressing the low-pressure gas-phase refrigerant supplied to the outdoor unit 3-1 through the low-pressure gas pipe 6, and discharges the high-pressure gas-phase refrigerant to the high-pressure gas pipe 7. One end of the outdoor heat exchanger is connected to the liquid pipe 8, and the other end of the outdoor heat exchanger is connected to the four-way valve. The four-way valve is connected to the high pressure gas pipe 7 and the low pressure gas pipe 6 . The four-way valve is switched between a first mode and a second mode. When switched to the first mode, the four-way valve connects the high pressure gas pipe 7 to the indoor heat exchanger without connecting the low pressure gas pipe 6 to the high pressure gas pipe 7 and the indoor heat exchanger. When switched to the second mode, the four-way valve connects the low pressure gas pipe 6 to the indoor heat exchanger without connecting the high pressure gas pipe 7 to the low pressure gas pipe 6 and the indoor heat exchanger. Among the plurality of outdoor units 3-1 to 3-2, the outdoor unit 3-2, which is different from the outdoor unit 3-1, is also formed in the same manner as the outdoor unit 3-1. and a liquid pipe 8 to the cooling/heating switching device 1 .

また、空気調和装置２は、複数の室内機液管１１－１～１１－４と、複数の室内機側ガス管１２－１～１２－４と、を備える。複数の室内機液管１１－１～１１－４は、複数の室内機５－１～５－４に対応している。複数の室内機５－１～５－４のうち、室内機５－１は、複数の室内機液管１１－１～１１－４のうちの室内機５－１に対応する室内機液管１１－１を介して冷暖切換装置１に接続されている。複数の室内機側ガス管１２－１～１２－４は、複数の室内機５－１～５－４に対応している。室内機５－１は、複数の室内機側ガス管１２－１～１２－４のうちの室内機５－１に対応する室内機側ガス管１２－１を介して冷暖切換装置１に接続されている。 The air conditioner 2 also includes a plurality of indoor unit liquid pipes 11-1 to 11-4 and a plurality of indoor unit side gas pipes 12-1 to 12-4. The plurality of indoor unit liquid pipes 11-1 to 11-4 correspond to the plurality of indoor units 5-1 to 5-4. Among the plurality of indoor units 5-1 to 5-4, the indoor unit 5-1 is the indoor unit liquid pipe 11 corresponding to the indoor unit 5-1 among the plurality of indoor unit liquid pipes 11-1 to 11-4. -1 to the cooling/heating switching device 1. The plurality of indoor unit side gas pipes 12-1 to 12-4 correspond to the plurality of indoor units 5-1 to 5-4. The indoor unit 5-1 is connected to the cooling/heating switching device 1 through an indoor unit side gas pipe 12-1 corresponding to the indoor unit 5-1 among the plurality of indoor unit side gas pipes 12-1 to 12-4. ing.

室内機５－１は、図示しない膨張弁及び室内熱交換器を備える。冷媒の流れ方向における膨張弁の一方側は、室内機液管１１－１に接続されており、膨張弁の他方側は、室内熱交換器の一端に接続されている。室内熱交換器の他端は、室内機側ガス管１２－１に接続されている。複数の室内機５－１～５－４のうちの他の室内機も、室内機５－１と同様に形成されており、複数の室内機液管１１－１～１１－４のうちの１つと、複数の室内機側ガス管１２－１～１２－４のうちの１つとを介して冷暖切換装置１に接続されている。 The indoor unit 5-1 includes an expansion valve and an indoor heat exchanger (not shown). One side of the expansion valve in the refrigerant flow direction is connected to the indoor unit liquid pipe 11-1, and the other side of the expansion valve is connected to one end of the indoor heat exchanger. The other end of the indoor heat exchanger is connected to the indoor unit side gas pipe 12-1. Other indoor units among the plurality of indoor units 5-1 to 5-4 are also formed in the same manner as the indoor unit 5-1, and one of the plurality of indoor unit liquid pipes 11-1 to 11-4 and one of a plurality of indoor unit side gas pipes 12-1 to 12-4.

また、空気調和装置２は、１３台以上の室内機を備える場合、他の冷暖切換装置１４と、低圧ガス管１５と、高圧ガス管１６と、液管１７と、をさらに備える。冷暖切換装置１４は、冷暖切換装置１と同様に、１３台目以降の室内機に接続されて、低圧ガス管１５、高圧ガス管１６及び液管１７を介して冷暖切換装置１に接続されている。空気調和装置２は、１２台以下の室内機を用いる場合、冷暖切換装置１４を備える必要がなく、冷暖切換装置１４、低圧ガス管１５、高圧ガス管１６、液管１７が省略されてもよい。 When the air conditioner 2 includes 13 or more indoor units, the air conditioner 2 further includes another cooling/heating switching device 14 , a low pressure gas pipe 15 , a high pressure gas pipe 16 and a liquid pipe 17 . Like the cooling/heating switching device 1, the cooling/heating switching device 14 is connected to the 13th and subsequent indoor units, and is connected to the cooling/heating switching device 1 via a low-pressure gas pipe 15, a high-pressure gas pipe 16, and a liquid pipe 17. there is When using 12 or less indoor units, the air conditioner 2 does not need to include the cooling/heating switching device 14, and the cooling/heating switching device 14, the low pressure gas pipe 15, the high pressure gas pipe 16, and the liquid pipe 17 may be omitted. .

（冷暖切換装置の構成）
図２は、実施例の冷暖切換装置１を示す斜視図である。図３は、実施例の冷暖切換装置１を下側から示す斜視図である。図４及び図５は、実施例の冷暖切換装置１における筐体の内部を示す斜視図である。 (Configuration of cooling/heating switching device)
FIG. 2 is a perspective view showing the cooling/heating switching device 1 of the embodiment. FIG. 3 is a perspective view showing the cooling/heating switching device 1 of the embodiment from below. 4 and 5 are perspective views showing the inside of the housing in the cooling/heating switching device 1 of the embodiment.

図２～図５に示すように、冷暖切換装置１は、複数の室内機５－１～５－４（以下、室内機５とも称する。）及び少なくとも１つの室外機としての２台の室外機３－１、３－２（以下、室外機３とも称する。）に接続された複数の冷媒配管３０（図５、６参照）と、複数の冷媒配管３０に設けられた複数の開閉弁３１～３４と、を有する配管部５１を備える。また、冷暖切換装置１は、複数の開閉弁３１～３４をそれぞれ開閉する複数の開閉機構５３（図４参照）を有する駆動部５２と、複数の開閉機構５３を制御する制御部５４（図２、３参照）と、配管部５１、駆動部５２及び制御部１３が収容される筐体５５と、を備える。なお、駆動部５２は、筐体５５内の後述する機構収容空間５６Ｂに収容された複数の開閉機構５３全体を指す。 As shown in FIGS. 2 to 5, the cooling/heating switching device 1 includes a plurality of indoor units 5-1 to 5-4 (hereinafter also referred to as indoor units 5) and two outdoor units as at least one outdoor unit. A plurality of refrigerant pipes 30 (see FIGS. 5 and 6) connected to 3-1 and 3-2 (hereinafter also referred to as the outdoor unit 3), and a plurality of on-off valves 31 provided in the plurality of refrigerant pipes 30 to 34, and a piping portion 51 having. The cooling/heating switching device 1 also includes a driving unit 52 having a plurality of opening/closing mechanisms 53 (see FIG. 4) for opening and closing the plurality of opening/closing valves 31 to 34, and a control unit 54 (see FIG. 2) for controlling the plurality of opening/closing mechanisms 53. , 3), and a housing 55 in which the pipe section 51, the driving section 52, and the control section 13 are housed. In addition, the drive unit 52 refers to the entirety of the plurality of opening/closing mechanisms 53 housed in a mechanism housing space 56B described later inside the housing 55 .

配管部５１は、図４及び図５に示すように、１２台の室内機５の各々に対応する複数の配管群２４－１～２４－１２を有する。複数の配管群２４－１～２４－１２のうち、配管群２４－１は、複数の冷媒配管３０と、複数の開閉弁３１～３４と、複数のキャピラリーチューブ３５～３６と、を備える（図６参照）。また、複数の配管群２４－２～２４－１２についても、配管群２４－１と同様である。配管部５１は、１台の室内機５毎に２つの冷媒配管３０が接続されており、この２つの冷媒配管３０（図４、図５中の破線参照）が、１台の室外機３に接続された室外機側低圧ガス管２１及び室外機側高圧ガス管２２に接続されている。室外機側液管２３は、配管部５１内を通過するように配置されている。１台の室内機５に接続された２つの冷媒配管３０には、合計４つの開閉弁３１～３４が、１つの冷媒循環回路（冷凍サイクル）における冷媒の流れ及び圧力を調節するための吐出弁、吸入弁、加圧弁、減圧弁として設けられている。開閉弁３１～３４は、いわゆる電磁弁であり、開閉機構５３の電磁コイル５３ｂによって開閉される。 4 and 5, the pipe section 51 has a plurality of pipe groups 24-1 to 24-12 corresponding to the twelve indoor units 5, respectively. Among the plurality of pipe groups 24-1 to 24-12, the pipe group 24-1 includes a plurality of refrigerant pipes 30, a plurality of on-off valves 31 to 34, and a plurality of capillary tubes 35 to 36 (Fig. 6). Also, the plurality of pipe groups 24-2 to 24-12 are similar to the pipe group 24-1. The piping portion 51 is connected to two refrigerant pipes 30 for each indoor unit 5 , and these two refrigerant pipes 30 (see broken lines in FIGS. 4 and 5 ) are connected to one outdoor unit 3 . It is connected to the connected outdoor unit side low pressure gas pipe 21 and outdoor unit side high pressure gas pipe 22 . The outdoor unit side liquid pipe 23 is arranged so as to pass through the piping portion 51 . Two refrigerant pipes 30 connected to one indoor unit 5 have a total of four on-off valves 31 to 34, a discharge valve for adjusting the flow and pressure of the refrigerant in one refrigerant circulation circuit (refrigeration cycle). , a suction valve, a pressurization valve, and a decompression valve. The on-off valves 31 to 34 are so-called electromagnetic valves, and are opened and closed by an electromagnetic coil 53b of the opening-and-closing mechanism 53. As shown in FIG.

駆動部５２は、１台の室内機５毎に４個の開閉機構５３（図４参照）を有しており、合計４８個の開閉機構５３を有する。各開閉機構５３は、図４に示すように、開閉弁３１～３４を作動させる駆動軸５３ａと電磁コイル５３ｂを有しており、電磁コイル５３ｂを介して制御部５４と電気的に接続されている。駆動部５２の要部については後述する。 The drive unit 52 has four opening/closing mechanisms 53 (see FIG. 4) for each indoor unit 5, and has a total of 48 opening/closing mechanisms 53. As shown in FIG. Each opening/closing mechanism 53 has a drive shaft 53a and an electromagnetic coil 53b for operating the opening/closing valves 31 to 34, as shown in FIG. there is Principal parts of the drive unit 52 will be described later.

筐体５５は、冷媒配管３０及び開閉弁３１～３４が収容される配管収容空間５６Ａと、開閉機構５３が収容される機構収容空間５６Ｂと、後述する基板収容空間５６Ｃとが内部にそれぞれ独立して仕切られて設けられている。筐体５５は、図２及び図３に示すように、基板収容空間５６Ｃと機構収容空間５６Ｂとを仕切る仕切り板８２ａを有する。また、筐体５５は、基板収容空間５６Ｃを開閉可能とする蓋体５７（図２、３参照）を有する。蓋体５７は、筐体５５に対して着脱可能に設けられており、ネジ等の締結部材（図示せず）によって筐体５５に固定されている。 The housing 55 has a pipe accommodation space 56A in which the refrigerant pipe 30 and the on-off valves 31 to 34 are accommodated, a mechanism accommodation space 56B in which the opening/closing mechanism 53 is accommodated, and a substrate accommodation space 56C, which will be described later. They are partitioned off. As shown in FIGS. 2 and 3, the housing 55 has a partition plate 82a that separates the substrate accommodation space 56C and the mechanism accommodation space 56B. Further, the housing 55 has a lid body 57 (see FIGS. 2 and 3) capable of opening and closing the substrate accommodation space 56C. The lid 57 is detachably attached to the housing 55, and is fixed to the housing 55 by fastening members (not shown) such as screws.

図６は、実施例の冷暖切換装置を示す冷媒回路図である。図６に示すように、冷暖切換装置１は、室外機側低圧ガス管２１と、室外機側高圧ガス管２２と、室外機側液管２３と、複数の配管群２４－１～２４－１２と、複数の室内機側ガス管２５－１～２５－１２と、複数の室内機側液管２６－１～２６－１２と、を備える。室外機側低圧ガス管２１は、低圧ガス管６に接続されている。室外機側高圧ガス管２２は、高圧ガス管７に接続されている。室外機側液管２３は、液管８に接続されている。複数の室内機側ガス管２５－１～２５－１２は、複数の配管群２４－１～２４－１２に対応している。複数の室内機側液管２６－１～２６－１２は、複数の配管群２４－１～２４－１２に対応している。 FIG. 6 is a refrigerant circuit diagram showing the cooling/heating switching device of the embodiment. As shown in FIG. 6, the cooling/heating switching device 1 includes an outdoor unit side low pressure gas pipe 21, an outdoor unit side high pressure gas pipe 22, an outdoor unit side liquid pipe 23, and a plurality of pipe groups 24-1 to 24-12. , a plurality of indoor unit side gas pipes 25-1 to 25-12, and a plurality of indoor unit side liquid pipes 26-1 to 26-12. The outdoor unit side low pressure gas pipe 21 is connected to the low pressure gas pipe 6 . The outdoor unit side high pressure gas pipe 22 is connected to the high pressure gas pipe 7 . The outdoor unit side liquid pipe 23 is connected to the liquid pipe 8 . The plurality of indoor unit side gas pipes 25-1 to 25-12 correspond to the plurality of pipe groups 24-1 to 24-12. The plurality of indoor unit side liquid pipes 26-1 to 26-12 correspond to the plurality of pipe groups 24-1 to 24-12.

複数の配管群２４－１～２４－１２のうち、配管群２４－１において、複数の開閉弁３１～３４と複数のキャピラリーチューブ３５～３６は、複数の冷媒配管３０を介して互いに接続されている。すなわち、複数の開閉弁３１～３４のうち、第１開閉弁３１は、冷媒の流れ方向における一方側が、室外機側低圧ガス管２１に接続されており、第１開閉弁３１の他方側が、複数の室内機側ガス管２５－１～２５－１２のうちの配管群２４－１に対応する室内機側ガス管２５－１に接続されている。複数の開閉弁３１～３４のうち、第２開閉弁３２は、冷媒の流れ方向における一方側が、室外機側高圧ガス管２２に接続されており、第２開閉弁３２の他方側が、室内機側ガス管２５－１に接続されている。複数の開閉弁３１～３４のうち、第３開閉弁３３は、冷媒の流れ方向における一方側が、室外機側低圧ガス管２１に接続されており、第３開閉弁３３の他方側が、第１キャピラリーチューブ３５の一端に接続されている。複数の開閉弁３１～３４のうち、第４開閉弁３４は、冷媒の流れ方向における一方側が、室外機側高圧ガス管２２に接続されており、第４開閉弁３４の他方側が、第１キャピラリーチューブ３５の一端に接続されている。第１キャピラリーチューブ３５の他端は、室内機側ガス管２５－１に接続されている。第２キャピラリーチューブ３６の一端は、冷媒の流れ方向における第１開閉弁３１の一方側に接続されており、第２キャピラリーチューブ３６の他端は、第１開閉弁３１の他方側に接続されている。 Among the plurality of pipe groups 24-1 to 24-12, in the pipe group 24-1, the plurality of on-off valves 31 to 34 and the plurality of capillary tubes 35 to 36 are connected to each other via the plurality of refrigerant pipes 30. there is That is, among the plurality of on-off valves 31 to 34, the first on-off valve 31 has one side in the flow direction of the refrigerant connected to the outdoor unit side low-pressure gas pipe 21, and the other side of the first on-off valve 31 has a plurality of is connected to the indoor unit side gas pipe 25-1 corresponding to the pipe group 24-1 among the indoor unit side gas pipes 25-1 to 25-12. Among the plurality of on-off valves 31 to 34, one side of the second on-off valve 32 in the flow direction of the refrigerant is connected to the outdoor unit side high-pressure gas pipe 22, and the other side of the second on-off valve 32 is connected to the indoor unit side. It is connected to the gas pipe 25-1. Among the plurality of on-off valves 31 to 34, one side of the third on-off valve 33 in the flow direction of the refrigerant is connected to the outdoor unit side low-pressure gas pipe 21, and the other side of the third on-off valve 33 is connected to the first capillary. It is connected to one end of tube 35 . Among the plurality of on-off valves 31 to 34, one side of the fourth on-off valve 34 in the refrigerant flow direction is connected to the outdoor unit side high-pressure gas pipe 22, and the other side of the fourth on-off valve 34 is connected to the first capillary. It is connected to one end of tube 35 . The other end of the first capillary tube 35 is connected to the indoor unit side gas pipe 25-1. One end of the second capillary tube 36 is connected to one side of the first on-off valve 31 in the refrigerant flow direction, and the other end of the second capillary tube 36 is connected to the other side of the first on-off valve 31. there is

複数の配管群２４－１～２４－１２のうちの配管群２４－１と異なる他の配管群２４－２～２４～１２も、配管群２４－１と同様に形成されている。例えば、複数の配管群２４－１～２４－１２のうちの配管群２４－１２は、複数の開閉弁３１～３４と、複数のキャピラリーチューブ３５～３６と、を備える。配管群２４－１２は、複数の室内機側ガス管２５－１～２５－１２のうちの配管群２４－１２に対応する室内機側ガス管２５－１２に接続されている。 Of the plurality of pipe groups 24-1 to 24-12, other pipe groups 24-2 to 24-12 different from pipe group 24-1 are also formed in the same manner as pipe group 24-1. For example, among the plurality of pipe groups 24-1 to 24-12, the pipe group 24-12 includes a plurality of on-off valves 31-34 and a plurality of capillary tubes 35-36. The pipe group 24-12 is connected to an indoor unit side gas pipe 25-12 corresponding to the pipe group 24-12 among the plurality of indoor unit side gas pipes 25-1 to 25-12.

複数の室内機側ガス管２５－１～２５－１２は、複数の室内機５－１～５－４に対応している。例えば、複数の室内機側ガス管２５－１～２５－１２のうちの室内機５－１に対応する室内機側ガス管２５－１は、室内機側ガス管１２－１に接続されており、室内機側ガス管１２－１を介して室内機５－１に接続されている。複数の室内機側ガス管２５－１～２５－１２のうちの室内機５－２に対応する室内機側ガス管２５－２は、室内機側ガス管１２－２に接続されており、室内機側ガス管１２－２を介して室内機５－２に接続されている。複数の室内機側ガス管２５－１～２５－１２のうちの室内機５－３に対応する室内機側ガス管２５－３は、室内機側ガス管１２－３に接続されており、室内機側ガス管１２－３を介して室内機５－３に接続されている。複数の室内機側ガス管２５－１～２５－１２のうちの室内機５－４に対応する室内機側ガス管２５－４は、室内機側ガス管１２－４に接続されており、室内機側ガス管１２－４を介して室内機５－４に接続されている。 The plurality of indoor unit side gas pipes 25-1 to 25-12 correspond to the plurality of indoor units 5-1 to 5-4. For example, among the plurality of indoor unit side gas pipes 25-1 to 25-12, the indoor unit side gas pipe 25-1 corresponding to the indoor unit 5-1 is connected to the indoor unit side gas pipe 12-1. , is connected to the indoor unit 5-1 via the indoor unit side gas pipe 12-1. Among the plurality of indoor unit side gas pipes 25-1 to 25-12, the indoor unit side gas pipe 25-2 corresponding to the indoor unit 5-2 is connected to the indoor unit side gas pipe 12-2. It is connected to the indoor unit 5-2 via the unit-side gas pipe 12-2. Among the plurality of indoor unit side gas pipes 25-1 to 25-12, the indoor unit side gas pipe 25-3 corresponding to the indoor unit 5-3 is connected to the indoor unit side gas pipe 12-3. It is connected to the indoor unit 5-3 via the unit-side gas pipe 12-3. Among the plurality of indoor unit side gas pipes 25-1 to 25-12, the indoor unit side gas pipe 25-4 corresponding to the indoor unit 5-4 is connected to the indoor unit side gas pipe 12-4. It is connected to the indoor unit 5-4 via the unit-side gas pipe 12-4.

複数の室内機側液管２６－１～２６－１２の各々は、室外機側液管２３に接続されている。複数の室内機側液管２６－１～２６－１２は、複数の室内機５－１～５－４に対応している。例えば、複数の室内機側液管２６－１～２６－１２のうちの室内機５－１に対応する室内機側液管２６－１は、室内機液管１１－１に接続されており、室内機液管１１－１を介して室内機５－１に接続されている。複数の室内機側液管２６－１～２６－１２のうちの室内機５－２に対応する室内機側液管２６－２は、室内機液管１１－２に接続されており、室内機液管１１－２を介して室内機５－２に接続されている。複数の室内機側液管２６－１～２６－１２のうちの室内機５－３に対応する室内機側液管２６－３は、室内機液管１１－３に接続されており、室内機液管１１－３を介して室内機５－３に接続されている。複数の室内機側液管２６－１～２６－１２のうちの室内機５－４に対応する室内機側液管２６－４は、室内機液管１１－４に接続されており、室内機液管１１－４を介して室内機５－４に接続されている。 Each of the indoor unit side liquid pipes 26 - 1 to 26 - 12 is connected to the outdoor unit side liquid pipe 23 . The plurality of indoor unit side liquid pipes 26-1 to 26-12 correspond to the plurality of indoor units 5-1 to 5-4. For example, the indoor unit side liquid pipe 26-1 corresponding to the indoor unit 5-1 among the plurality of indoor unit side liquid pipes 26-1 to 26-12 is connected to the indoor unit liquid pipe 11-1, It is connected to the indoor unit 5-1 via the indoor unit liquid pipe 11-1. Among the plurality of indoor unit side liquid pipes 26-1 to 26-12, the indoor unit side liquid pipe 26-2 corresponding to the indoor unit 5-2 is connected to the indoor unit liquid pipe 11-2. It is connected to the indoor unit 5-2 via the liquid pipe 11-2. Among the plurality of indoor unit side liquid pipes 26-1 to 26-12, the indoor unit side liquid pipe 26-3 corresponding to the indoor unit 5-3 is connected to the indoor unit side liquid pipe 11-3. It is connected to the indoor unit 5-3 via the liquid pipe 11-3. Among the plurality of indoor unit side liquid pipes 26-1 to 26-12, the indoor unit side liquid pipe 26-4 corresponding to the indoor unit 5-4 is connected to the indoor unit liquid pipe 11-4. It is connected to the indoor unit 5-4 via the liquid pipe 11-4.

冷暖切換装置１の室外機側低圧ガス管２１は、空気調和装置２が他の冷暖切換装置を備える場合に、低圧ガス管１５に接続されており、低圧ガス管１５を介して冷暖切換装置１４の室外機側低圧ガス管２１に接続されている。このとき、冷暖切換装置１の室外機側高圧ガス管２２は、高圧ガス管１６に接続されており、高圧ガス管１６を介して冷暖切換装置１４の室外機側高圧ガス管２２に接続されている。冷暖切換装置１の室外機側液管２３は、液管１７に接続されており、液管１７を介して冷暖切換装置１４の室外機側液管２３に接続されている。すなわち、冷暖切換装置１４の室外機側低圧ガス管２１、室外機側高圧ガス管２２及び室外機側液管２３は、冷暖切換装置１を介して、低圧ガス管６、高圧ガス管７及び液管８にそれぞれ接続されている。さらに、冷暖切換装置１４は、冷暖切換装置１と同様に、複数の室内機側ガス管２５－１～２５－１２と、複数の室内機側液管２６－１～２６－１２とを介して、１３台目以降の室内機に接続されている。 The outdoor unit side low-pressure gas pipe 21 of the cooling/heating switching device 1 is connected to the low-pressure gas pipe 15 when the air conditioner 2 includes another cooling/heating switching device. is connected to the outdoor unit side low pressure gas pipe 21. At this time, the outdoor unit side high pressure gas pipe 22 of the cooling/heating switching device 1 is connected to the high pressure gas pipe 16, and is connected to the outdoor unit side high pressure gas pipe 22 of the cooling/heating switching device 14 via the high pressure gas pipe 16. there is The outdoor unit side liquid pipe 23 of the cooling/heating switching device 1 is connected to the liquid pipe 17 , and is connected to the outdoor unit side liquid pipe 23 of the cooling/heating switching device 14 via the liquid pipe 17 . That is, the outdoor unit side low pressure gas pipe 21, the outdoor unit side high pressure gas pipe 22 and the outdoor unit side liquid pipe 23 of the cooling/heating switching device 14 are connected via the cooling/heating switching device 1 to the low pressure gas pipe 6, the high pressure gas pipe 7 and the liquid Each is connected to a tube 8 . Furthermore, similarly to the cooling/heating switching device 1, the cooling/heating switching device 14 has a plurality of indoor unit side gas pipes 25-1 to 25-12 and a plurality of indoor unit side liquid pipes 26-1 to 26-12. , is connected to the 13th and subsequent indoor units.

（駆動部の要部）
以下、本実施例における駆動部５２の要部の構成について説明する。図７は、実施例の冷暖切換装置１の配管部５１及び駆動部５２を示す側面図である。図８は、実施例における駆動部５２の伝熱部材を示す正面図である。 (main part of drive unit)
The configuration of the main part of the drive unit 52 in this embodiment will be described below. FIG. 7 is a side view showing the piping portion 51 and the driving portion 52 of the cooling/heating switching device 1 of the embodiment. FIG. 8 is a front view showing a heat transfer member of the driving section 52 in the embodiment.

図４及び図７に示すように、１台の室内機５に接続された２つの冷媒配管３０における４個の開閉機構５３は、室内機５を冷房または暖房で稼働するときに制御部５４から電力が供給されることで一方の開閉機構５３が作動状態となり、制御部５４から電力が供給されずに他方の開閉機構５３が作動停止となる一対の開閉機構５３Ａ、５３Ｂ（一対の開閉機構１００とも称する。）を含む。具体的には、一対の開閉機構１００（５３Ａ、５３Ｂ）は、開閉弁３４としての加圧弁を開閉する開閉機構５３Ａと、開閉弁３３としての減圧弁を開閉する開閉機構５３Ｂである。１台の室内機５に対応する４個の開閉機構５３のうち、他の２個の開閉機構５３は、開閉弁３１である吸入弁と、開閉弁３２である吐出弁をそれぞれ開閉する開閉機構５３である。 As shown in FIGS. 4 and 7, the four opening/closing mechanisms 53 in the two refrigerant pipes 30 connected to one indoor unit 5 are controlled by the controller 54 when the indoor unit 5 is operated for cooling or heating. One of the opening/closing mechanisms 53 is activated by being supplied with electric power, and the other opening/closing mechanism 53 is deactivated without being supplied with electric power from the control unit 54. Also called.). Specifically, the pair of opening/closing mechanisms 100 (53A, 53B) is an opening/closing mechanism 53A that opens and closes a pressurization valve as the opening/closing valve 34, and an opening/closing mechanism 53B that opens and closes a pressure reducing valve as the opening/closing valve 33. Of the four opening/closing mechanisms 53 corresponding to one indoor unit 5, the other two opening/closing mechanisms 53 are opening/closing mechanisms for opening and closing an intake valve, which is the opening/closing valve 31, and a discharge valve, which is the opening/closing valve 32. 53.

図７及び図８に示すように、一対の開閉機構１００（５３Ａ、５３Ｂ）は、電磁コイル５３ｂが発生する熱を放熱する放熱部材８０を有する。一対の開閉機構１００（５３Ａ、５３Ｂ）と同様に、開閉弁３２である吐出弁を開閉する開閉機構５３にも、放熱部材８０が設けられている。１つの室内機５に接続された複数の冷媒配管３０における複数の開閉機構５３において、一対の開閉機構５３Ａ、５３Ｂは、筐体５５内において隣り合って配置されている。 As shown in FIGS. 7 and 8, the pair of opening/closing mechanisms 100 (53A, 53B) has a heat radiating member 80 that radiates heat generated by the electromagnetic coil 53b. As with the pair of opening/closing mechanisms 100 (53A, 53B), the opening/closing mechanism 53 that opens and closes the discharge valve, which is the opening/closing valve 32, is also provided with a heat radiating member 80. As shown in FIG. Among the plurality of opening/closing mechanisms 53 in the plurality of refrigerant pipes 30 connected to one indoor unit 5, a pair of opening/closing mechanisms 53A and 53B are arranged adjacent to each other inside the housing 55. As shown in FIG.

放熱部材８０は、例えば、アルミニウム、銅、真鍮等の高い熱伝導性を有する金属材料によって円筒状に形成されており、開閉機構５３の電磁コイル５３ｂの外周側に取り付けられている。放熱部材８０は、複数の放熱フィン８０ａと、後述する伝熱部材８４が連結される連結部８０ｂと、を有する。放熱フィン８０ａは、円筒状の放熱部材８０の一端部における周方向に沿って複数の溝が設けられることによって形成されている。放熱部材８０の他端部には、放熱フィン８０ａが形成されていない連結部８０ｂが設けられている。放熱部材８０は、上述の放熱フィン８０ａを有する構造に限定されず、任意の形状に形成されてよい。 The heat radiating member 80 is formed in a cylindrical shape from a metal material having high thermal conductivity such as aluminum, copper, or brass, and is attached to the outer peripheral side of the electromagnetic coil 53b of the opening/closing mechanism 53 . The heat radiating member 80 has a plurality of heat radiating fins 80a and a connection portion 80b to which a heat transfer member 84, which will be described later, is connected. The heat radiating fins 80 a are formed by providing a plurality of grooves along the circumferential direction at one end of the cylindrical heat radiating member 80 . At the other end of the heat radiating member 80, a connecting portion 80b is provided where the heat radiating fins 80a are not formed. The heat dissipating member 80 is not limited to the structure having the heat dissipating fins 80a described above, and may be formed in any shape.

一対の開閉機構１００（５３Ａ、５３Ｂ）の各放熱部材８０は、放熱部材８０同士を熱的に接続する伝熱部材８４によって連結されている。伝熱部材８４は、例えば、アルミニウム、銅、真鍮等の高い熱伝導性を有する金属材料によって板状に形成されている。伝熱部材８４は、一端部が開閉機構５３Ａの放熱部材８０の連結部８０ｂに接続されており、他端部が開閉機構５３Ｂの放熱部材８０の連結部８０ｂに接続されている。伝熱部材８４の両端部は、溶接やネジ等の締結部材によって放熱部材８０に接続されている。伝熱部材８４の両端部は、円筒状の放熱部材８０の連結部８０ｂの外周面に合わせて湾曲されてもよく、伝熱部材８４と放熱部材８０との接触状態を適正に確保できる。あるいは、円筒状の放熱部材８０における連結部８０ｂの外周面の一部が平坦面に形成されてもよく、平板状の伝熱部材８４と連結部８０ｂとの接触状態を適正に確保できる。 Each heat radiating member 80 of the pair of opening/closing mechanisms 100 (53A, 53B) is connected by a heat transfer member 84 that thermally connects the heat radiating members 80 to each other. The heat transfer member 84 is made of a metal material having high thermal conductivity, such as aluminum, copper, or brass, and is formed in a plate shape. The heat transfer member 84 has one end connected to the connecting portion 80b of the heat radiating member 80 of the opening/closing mechanism 53A, and the other end connected to the connecting portion 80b of the heat radiating member 80 of the opening/closing mechanism 53B. Both ends of the heat transfer member 84 are connected to the heat dissipation member 80 by fastening members such as welding and screws. Both ends of the heat transfer member 84 may be curved to match the outer peripheral surface of the connecting portion 80b of the cylindrical heat dissipating member 80, so that a proper contact state between the heat transfer member 84 and the heat dissipating member 80 can be ensured. Alternatively, a portion of the outer peripheral surface of the connecting portion 80b of the cylindrical heat radiating member 80 may be formed as a flat surface, so that a proper contact state between the flat heat transfer member 84 and the connecting portion 80b can be ensured.

このように伝熱部材８４が放熱部材８０の連結部８０ｂに接続されることで、伝熱部材８４によって各放熱部材８０間で熱を伝達することが可能になる。また、一対の開閉機構１００（５３Ａ、５３Ｂ）は、隣り合って配置されているので、伝熱部材８４によって一対の開閉機構１００（５３Ａ、５３Ｂ）を容易に連結することが可能になり、伝熱部材８４の形状が簡素化される。 By connecting the heat transfer member 84 to the connecting portion 80 b of the heat dissipation member 80 in this manner, heat can be transferred between the heat dissipation members 80 by the heat transfer member 84 . In addition, since the pair of opening/closing mechanisms 100 (53A, 53B) are arranged side by side, the pair of opening/closing mechanisms 100 (53A, 53B) can be easily connected by the heat transfer member 84. The shape of the thermal member 84 is simplified.

伝熱部材８４は、放熱フィン８０ａの位置以外の連結部８０ｂに連結されることで、放熱フィン８０ａによる放熱性を損なうことなく、一方の開閉機構５３Ａ（５３Ｂ）の放熱部材８０から、他方の開閉機構５３Ｂ（５３Ａ）の放熱部材８０に熱が伝達される。言い換えると、一方の開閉機構５３Ａ（５３Ｂ）の電磁コイル５３ｂが発生する熱が、伝熱部材８４を介して一対の開閉機構１００（５３Ａ、５３Ｂ）の各放熱部材８０の放熱フィン８０ａによって放熱することが可能となる。また、伝熱部材８４は、冷暖切換装置１に接続された全ての室内機５における一対の開閉機構１００（５３Ａ、５３Ｂ）にそれぞれ設けられている。 The heat transfer member 84 is connected to the connection portion 80b other than the position of the heat radiation fins 80a, so that the heat radiation member 80 of one of the opening/closing mechanisms 53A (53B) can be transferred from the heat radiation member 80 of the other opening/closing mechanism 53A (53B) without impairing the heat radiation performance of the heat radiation fins 80a. Heat is transferred to the heat dissipation member 80 of the opening/closing mechanism 53B (53A). In other words, the heat generated by the electromagnetic coil 53b of one of the opening/closing mechanisms 53A (53B) is dissipated via the heat transfer member 84 by the radiation fins 80a of the heat radiation members 80 of the pair of opening/closing mechanisms 100 (53A, 53B). becomes possible. Also, the heat transfer member 84 is provided in each of the pair of opening/closing mechanisms 100 (53A, 53B) in all the indoor units 5 connected to the cooling/heating switching device 1. As shown in FIG.

また、駆動部５２における後述する機構収容空間５６Ｂは、例えば、筐体５５の通気口（図示せず）を介して筐体５５の外部と連通されて、外部の空気が機構収容空間５６Ｂに流れるように形成されてもよい。これにより、機構収容空間５６Ｂ内に配置された放熱部材８０による放熱性が適正に確保される。なお、放熱部材８０の適正な放熱性が確保される場合には、筐体５５が通気口を有する構造に限定されない。 Further, a later-described mechanism housing space 56B in the driving unit 52 is communicated with the outside of the housing 55 via, for example, a vent (not shown) of the housing 55, so that external air flows into the mechanism housing space 56B. It may be formed as As a result, proper heat dissipation is ensured by the heat dissipation member 80 arranged in the mechanism housing space 56B. It should be noted that the structure of the housing 55 is not limited to a structure having a ventilation hole as long as the proper heat dissipation property of the heat dissipation member 80 is ensured.

また、結露による液滴が開閉機構５３に付着した場合には、開閉機構５３を損傷するおそれがあるので好ましくない。このため、図示しないが、冷暖切換装置１が使用環境に設置された姿勢において、各開閉機構５３の位置は、開閉弁３１～３４よりも上方に位置するように配置されており、開閉弁３１～３４に結露して付着した液滴が開閉機構５３に伝わって付着することを防いでいる。 Also, if droplets due to dew condensation adhere to the opening/closing mechanism 53, the opening/closing mechanism 53 may be damaged, which is not preferable. For this reason, although not shown, in the posture in which the cooling/heating switching device 1 is installed in the operating environment, each opening/closing mechanism 53 is positioned above the opening/closing valves 31 to 34, and the opening/closing valves 31 . . 34 is prevented from being transferred to the opening/closing mechanism 53 and adhering to it.

（伝熱部材による放熱作用）
以上のように構成された駆動部５２の一対の開閉機構１００（５３Ａ、５３Ｂ）において、各放熱部材８０の熱が、伝熱部材８４を介して放熱される作用を説明する。例えば、室内機５を冷房で稼働させるときに作動する一方の開閉機構５３Ａの放熱部材８０の熱が、作動停止する他方の開閉機構５３Ｂの放熱部材８０に、伝熱部材８４を介して伝熱される。このため、作動する一方の開閉機構５３Ａの電磁コイル５３ｂが発生する熱が、一方の開閉機構５３Ａの放熱部材８０の放熱フィン８０ａと、他方の開閉機構５３Ｂの放熱部材８０の放熱フィン８０ａの両方によって放熱されるので、放熱面積が増えて放熱効率が高められる。その結果、室内機５を冷房で稼働させるときに作動する一方の開閉機構５３Ａの放熱部材８０の温度を低下させることができる。 (Heat dissipation action by heat transfer member)
In the pair of opening/closing mechanisms 100 (53A, 53B) of the drive unit 52 configured as described above, the operation of radiating the heat of each heat radiating member 80 via the heat transfer member 84 will be described. For example, the heat of the heat radiating member 80 of the opening/closing mechanism 53A that operates when the indoor unit 5 is operated in the cooling mode is transferred via the heat transfer member 84 to the heat radiating member 80 of the other opening/closing mechanism 53B that stops operating. be Therefore, the heat generated by the electromagnetic coil 53b of one of the operating opening/closing mechanisms 53A is transmitted to both the heat dissipation fins 80a of the heat dissipation member 80 of the one opening/closing mechanism 53A and the heat dissipation fins 80a of the heat dissipation member 80 of the other opening/closing mechanism 53B. Since the heat is dissipated by the heat dissipating area, the heat dissipating efficiency is enhanced. As a result, the temperature of the heat radiating member 80 of the opening/closing mechanism 53A, which operates when the indoor unit 5 is operated in the cooling mode, can be lowered.

これと同様に、室内機５を暖房で稼働させるときに作動する他方の開閉機構５３Ｂの放熱部材８０の熱が、作動停止する一方の開閉機構５３Ａの放熱部材８０に、伝熱部材８４を介して伝熱される。これにより、室内機５を暖房で稼働させるときに作動する他方の開閉機構５３Ｂの放熱部材８０の温度を低下させることができる。 Similarly, the heat of the heat radiation member 80 of the other opening/closing mechanism 53B that operates when the indoor unit 5 is operated for heating is transferred via the heat transfer member 84 to the heat radiation member 80 of the one opening/closing mechanism 53A that stops operating. heat transfer. Thereby, the temperature of the heat radiating member 80 of the other opening/closing mechanism 53B that operates when the indoor unit 5 is operated for heating can be lowered.

ここで、上述のように伝熱部材８４を用いた本実施例と、伝熱部材８４を用いていない比較例（図示せず）とを比較する。伝熱部材８４を用いた本実施例は、伝熱部材８４を用いていない比較例と比べて、室内機５が冷房または暖房で稼働するときに作動する開閉機構５３における放熱部材８０の温度が９．８℃低下した。したがって、伝熱部材８４によって開閉機構５３の放熱部材８０の放熱性が高められる。 Here, the present embodiment using the heat transfer member 84 as described above and the comparative example (not shown) not using the heat transfer member 84 will be compared. In this embodiment using the heat transfer member 84, the temperature of the heat radiating member 80 in the open/close mechanism 53 that operates when the indoor unit 5 is operated for cooling or heating is higher than the comparative example that does not use the heat transfer member 84. It decreased by 9.8°C. Therefore, the heat transfer member 84 enhances the heat dissipation of the heat dissipation member 80 of the opening/closing mechanism 53 .

（伝熱部材の変形例）
図９は、実施例における駆動部５２の伝熱部材８４の変形例を示す正面図である。上述した実施例の構造（図８）において、伝熱部材８４は、筐体５５と連結されてもよい。この場合、図９に示すように、伝熱部材８４は、筐体５５と熱的に接続される接続部８３を有しており、接続部８３が、例えば、機構収容空間５６Ｂにおける筐体５５の内壁や、開閉機構５３を支持する支持フレーム等に接続されている。図示しないが、接続部８３は、伝熱部材８４の両端部と同様に、溶接やネジ等によって連結されている。このように一対の開閉機構１００（５３Ａ、５３Ｂ）の放熱部材８０同士が連結されると共に、接続部８３によって筐体５５と接続されることで、作動する開閉機構５３の放熱部材８０の放熱性を更に高めることが可能になる。 (Modified example of heat transfer member)
FIG. 9 is a front view showing a modification of the heat transfer member 84 of the driving section 52 in the embodiment. In the structure of the embodiment described above ( FIG. 8 ), the heat transfer member 84 may be connected with the housing 55 . In this case, as shown in FIG. 9, the heat transfer member 84 has a connection portion 83 that is thermally connected to the housing 55. and a support frame that supports the opening/closing mechanism 53 . Although not shown, the connecting portion 83 is connected by welding, screws, or the like, like the two ends of the heat transfer member 84 . In this manner, the heat dissipation members 80 of the pair of opening/closing mechanisms 100 (53A, 53B) are connected to each other and connected to the housing 55 by the connecting portion 83, so that the heat dissipation properties of the heat dissipation members 80 of the operating opening/closing mechanism 53 are improved. can be further increased.

また、他の変形例としては、図９に示すように、一対の開閉機構１００（５３Ａ、５３Ｂ）の各放熱部材８０と伝熱部材８４は、一体に形成されてもよい。この場合、放熱部材８０と伝熱部材８４は、熱伝導性を有する金属材料等によって一体成形される。この場合、伝熱部材８４を各放熱部材８０に溶接やネジ等で接続する工程を省くことが可能になり、駆動部５２の組み立て工程が簡素化される。また、例えば、伝熱部材８４は、放熱部材８０の連結部８０ｂと一体に形成されて、連結部８０ｂと別部品の放熱フィン８０ａが、連結部８０ｂに接するように取り付けられてもよい。 As another modification, as shown in FIG. 9, each of the heat radiating member 80 and the heat transfer member 84 of the pair of opening/closing mechanisms 100 (53A, 53B) may be integrally formed. In this case, the heat radiating member 80 and the heat transfer member 84 are integrally formed of a metal material or the like having thermal conductivity. In this case, the process of connecting the heat transfer member 84 to each heat radiating member 80 by welding, screws, or the like can be omitted, and the process of assembling the drive unit 52 is simplified. Further, for example, the heat transfer member 84 may be formed integrally with the connecting portion 80b of the heat radiating member 80, and the heat radiating fins 80a, which are separate from the connecting portion 80b, may be attached so as to be in contact with the connecting portion 80b.

（制御部の構成）
以下、本実施例における要部である制御部５４の構成について説明する。図１０は、実施例の冷暖切換装置１の制御部５４を示す正面図である。図１１は、実施例の冷暖切換装置１の制御部５４において電源回路基板を回動した状態を示す斜視図である。 (Configuration of control section)
The configuration of the control unit 54, which is the main part of this embodiment, will be described below. FIG. 10 is a front view showing the controller 54 of the cooling/heating switching device 1 of the embodiment. FIG. 11 is a perspective view showing a state in which the power supply circuit board is rotated in the control section 54 of the cooling/heating switching device 1 of the embodiment.

図１０及び図１１に示すように、制御部５４は、複数の開閉機構５３を制御する複数の制御回路基板６１と、複数の開閉機構５３に電力を供給するための複数の電源回路基板６２と、筐体５５内に設けられて複数の制御回路基板６１及び複数の電源回路基板６２が収容される基板収容空間５６Ｃと、を有する。筐体５５の一部は、制御回路基板６１及び電源回路基板６２を収容するための、後述する電装品箱８２として形成されており、電装品箱８２の内部に、基板収容空間５６Ｃが設けられている。 As shown in FIGS. 10 and 11, the control unit 54 includes a plurality of control circuit boards 61 for controlling the plurality of opening/closing mechanisms 53, and a plurality of power supply circuit boards 62 for supplying power to the plurality of opening/closing mechanisms 53. , and a board accommodation space 56</b>C that is provided in the housing 55 and accommodates the plurality of control circuit boards 61 and the plurality of power supply circuit boards 62 . A part of the housing 55 is formed as an electrical component box 82, which will be described later, for accommodating the control circuit board 61 and the power circuit board 62, and a board accommodation space 56C is provided inside the electrical component box 82. ing.

図１０に示すように、基板収容空間５６Ｃには、６つの制御回路基板６１が一方向Ａに沿って並んで配置されており、３つの電源回路基板６２が、６つの制御回路基板６１に積層されて制御回路基板６１の配列方向に沿って並んで配置されている。図１０に示すように、基板収容空間５６Ｃ内には、３つの電源回路基板６２が、６つの制御回路基板６１に積層されて一方向Ａに沿って配列されている。本実施例において、制御回路基板６１及び電源回路基板６２は矩形状に形成されており、制御回路基板６１が短辺方向に沿って配列されている。電源回路基板６２は、長辺方向に沿って配列されている。 As shown in FIG. 10, six control circuit boards 61 are arranged side by side along one direction A in the board accommodation space 56C, and three power supply circuit boards 62 are stacked on the six control circuit boards 61. are arranged side by side along the direction in which the control circuit boards 61 are arranged. As shown in FIG. 10, three power supply circuit boards 62 are stacked on six control circuit boards 61 and arranged along one direction A in the board accommodation space 56C. In this embodiment, the control circuit board 61 and the power circuit board 62 are formed in a rectangular shape, and the control circuit boards 61 are arranged along the short side direction. The power supply circuit boards 62 are arranged along the long side direction.

また、上述の一方向Ａにおいて、１つの電源回路基板６２は、２つの制御回路基板６１に跨って積層されて配置されている。言い換えると、制御回路基板６１の厚み方向から見たとき、１つの電源回路基板６２が２つの制御回路基板６１の少なくとも一部分に重なって配置されており、制御部５４が、いわゆる２段支持構造を有する。ここで、「積層」とは、制御回路基板６１の上方に空間をあけるように支持構造（例えば、後述する支持台６５）を介して電源回路基板６２が配置される構造を指すが、制御回路基板６１上に電源回路基板６２が直接的に重ねられる簡素な積層構造も含まれる。なお、一方向Ａにおいて、１つの電源回路基板６２は、３つ以上の制御回路基板６１に跨って積層されてもよい。 In addition, one power supply circuit board 62 is stacked across two control circuit boards 61 in one direction A described above. In other words, when viewed from the thickness direction of the control circuit board 61, one power supply circuit board 62 overlaps at least a part of two control circuit boards 61, and the control section 54 has a so-called two-stage support structure. have. Here, "laminate" refers to a structure in which the power supply circuit board 62 is arranged via a support structure (for example, a support base 65 to be described later) so as to leave a space above the control circuit board 61. A simple laminate structure in which the power supply circuit board 62 is directly overlaid on the board 61 is also included. In one direction A, one power supply circuit board 62 may be laminated across three or more control circuit boards 61 .

本実施例において例えば、１つの制御回路基板６１は、２台の室内機５に対応する各開閉弁３１～３４の各開閉機構５３を制御する。２台の室内機５に対応する各開閉弁３１～３４の開閉機構５３とは、２台の室内機５の各々に接続された４つの冷媒配管３０における合計８つの開閉機構５３を指しており、１つの制御回路基板６１が８つの開閉機構５３を制御可能に構成されている。１つの電源回路基板６２は、４台の室内機５に対応する各開閉弁３１～３４の各開閉機構５３に電力を供給する。４台の室内機５に対応する各開閉弁３１～３４の開閉機構５３とは、４台の室内機５の各々に接続された８つの冷媒配管３０における合計１６の開閉機構５３を指しており、１つの電源回路基板６２が合計１６の開閉機構５３に電力を供給可能に構成されている。なお、制御回路基板６１が制御する開閉機構５３の個数、電源回路基板６２が電力を供給する開閉機構５３の個数は、上述した個数に限定されず、例えば、室内機５の個数や、制御回路基板６１及び電源回路基板６２の配置等に応じて任意に変更されてよい。 In this embodiment, for example, one control circuit board 61 controls each opening/closing mechanism 53 of each opening/closing valve 31 to 34 corresponding to two indoor units 5 . The opening/closing mechanisms 53 of the opening/closing valves 31 to 34 corresponding to the two indoor units 5 refer to a total of eight opening/closing mechanisms 53 in the four refrigerant pipes 30 connected to each of the two indoor units 5. , one control circuit board 61 is configured to be able to control eight opening/closing mechanisms 53 . One power supply circuit board 62 supplies power to each opening/closing mechanism 53 of each opening/closing valve 31 to 34 corresponding to four indoor units 5 . The opening/closing mechanisms 53 of the opening/closing valves 31 to 34 corresponding to the four indoor units 5 refer to a total of 16 opening/closing mechanisms 53 in the eight refrigerant pipes 30 connected to each of the four indoor units 5. , one power supply circuit board 62 is configured to be capable of supplying electric power to a total of 16 opening/closing mechanisms 53 . The number of opening/closing mechanisms 53 controlled by the control circuit board 61 and the number of opening/closing mechanisms 53 to which power is supplied by the power supply circuit board 62 are not limited to the numbers described above. It may be arbitrarily changed according to the arrangement of the board 61 and the power supply circuit board 62 .

上述のように制御部５４は、駆動部５２を制御するための回路基板が、制御回路基板６１と電源回路基板６２とに分けられて、制御回路基板６１と電源回路基板６２とが２段構造で支持されることにより、基板収容空間５６Ｃを有効利用し、制御部５４の小型化が図られている。また、制御部５４は、１つの電源回路基板６２が２つの制御回路基板６１に跨って配置されることにより、電源回路基板６２の個数を削減することが可能になる。 As described above, in the control section 54, the circuit board for controlling the driving section 52 is divided into the control circuit board 61 and the power circuit board 62, and the control circuit board 61 and the power circuit board 62 are arranged in two stages. By being supported by , the board accommodation space 56C is effectively used, and the size reduction of the control section 54 is achieved. In addition, the controller 54 can reduce the number of power supply circuit boards 62 by arranging one power supply circuit board 62 across two control circuit boards 61 .

図１２は、実施例における制御部５４の支持台６５及び第１基板ホルダを示す正面図である。図１３は、実施例における制御部５４の第１基板ホルダを示す斜視図である。図１１、図１２及び図１３に示すように、制御部５４は、複数の制御回路基板６１の各々を支持する複数の第１基板ホルダ６３と、複数の電源回路基板６２の各々を支持する複数の第２基板ホルダ６４と、複数の第２基板ホルダ６４を支持する、すなわち複数の電源回路基板６２を支持する支持台６５と、を有する。なお、本開示の特徴に含まれる「基板ホルダ」は、制御回路基板６１を支持する「第１基板ホルダ６３」を指す。 FIG. 12 is a front view showing the support base 65 and the first substrate holder of the controller 54 in the embodiment. FIG. 13 is a perspective view showing the first substrate holder of the controller 54 in the example. As shown in FIGS. 11, 12, and 13, the control unit 54 includes a plurality of first substrate holders 63 supporting each of the plurality of control circuit substrates 61, and a plurality of first substrate holders 63 supporting each of the plurality of power circuit substrates 62. and a support table 65 that supports the plurality of second substrate holders 64 , that is, supports the plurality of power supply circuit substrates 62 . The “board holder” included in the features of the present disclosure refers to the “first board holder 63 ” that supports the control circuit board 61 .

図１４は、実施例における第１基板ホルダ６３の要部を説明するための斜視図である。図１３及び図１４に示すように、第１基板ホルダ６３は、制御回路基板６１全体を支持する凹部７１と、筐体５５の仕切り板８２ａに係合する第１係合爪７２と、筐体５５の仕切り板８２ａにネジ等の締結部材によって固定される固定部７３と、を有する。 FIG. 14 is a perspective view for explaining a main part of the first substrate holder 63 in the example. As shown in FIGS. 13 and 14, the first board holder 63 includes a recess 71 that supports the entire control circuit board 61, first engaging claws 72 that engage with the partition plate 82a of the housing 55, and a fixing portion 73 fixed to the partition plate 82a of 55 by a fastening member such as a screw.

凹部７１の内壁には、制御回路基板６１の外周部を保持する複数の保持爪７１ａが形成されている。凹部７１の底面には、制御回路基板６１の裏面を支持する複数の柱状の支持突起７１ｂが所定間隔をあけて形成されている。 A plurality of holding claws 71 a are formed on the inner wall of the recess 71 to hold the outer peripheral portion of the control circuit board 61 . A plurality of columnar support projections 71b for supporting the back surface of the control circuit board 61 are formed on the bottom surface of the recess 71 at predetermined intervals.

図１５は、実施例における第１基板ホルダ６３の要部を拡大して示す斜視図である。第１係合爪７２は、図１４及び図１５に示すように、第１基板ホルダ６３の一端６３ａに設けられており、一端６３ａから、凹部７１の底面に沿う方向に突出して形成されている。第１基板ホルダ６３の一端６３ａには、２つの第１係合爪７２が間隔をあけて設けられている。第１係合爪７２は、矩形板状に形成されており、この矩形の短辺方向に沿って一端６３ａから突出している。 FIG. 15 is an enlarged perspective view showing a main part of the first substrate holder 63 in the embodiment. As shown in FIGS. 14 and 15, the first engaging claw 72 is provided at one end 63a of the first substrate holder 63 and protrudes from the one end 63a in a direction along the bottom surface of the recess 71. . Two first engaging claws 72 are provided at one end 63a of the first substrate holder 63 with an interval therebetween. The first engaging claw 72 is formed in a rectangular plate shape and protrudes from one end 63a along the short side direction of the rectangle.

固定部７３は、第１基板ホルダ６３の一端６３ａに対して、第１基板ホルダ６３に支持された制御回路基板６１を間に挟んで一端６３ａと反対側の他端６３ｂに設けられている。固定部７３は、第１基板ホルダ６３の他端６３ｂから、凹部７１の底面に沿う方向に突出して形成されており、ネジ等の締結部材が通される固定孔７３ａを有する。固定部７３は、第１基板ホルダ６３の他端６３ｂに沿う方向において、２つの第１係合爪７２の間に位置している。これにより、第１基板ホルダ６３は、２つの第１係合爪７２と固定部７３によって、仕切り板８２ａ上に安定的に固定される。 The fixing portion 73 is provided at one end 63a of the first board holder 63 at the other end 63b opposite to the one end 63a with the control circuit board 61 supported by the first board holder 63 interposed therebetween. The fixing portion 73 is formed to protrude from the other end 63b of the first substrate holder 63 in a direction along the bottom surface of the recess 71, and has a fixing hole 73a through which a fastening member such as a screw is passed. The fixing portion 73 is positioned between the two first engaging claws 72 in the direction along the other end 63 b of the first substrate holder 63 . Thereby, the first substrate holder 63 is stably fixed on the partition plate 82 a by the two first engaging claws 72 and the fixing portion 73 .

したがって、仕切り板８２ａの第１開口７６に第１係合爪７２を係合させて、１つのネジ等によって固定部７３を仕切り板８２ａに固定することで、第１基板ホルダ６３は仕切り板８２ａに容易かつ安定して固定される。このように第１基板ホルダ６３は、ネジ等で固定する固定部７３の個数が削減され、第１基板ホルダ６３を固定するための作業が簡素化される。 Therefore, by engaging the first engaging claws 72 with the first openings 76 of the partition plate 82a and fixing the fixing portion 73 to the partition plate 82a with one screw or the like, the first substrate holder 63 can be secured to the partition plate 82a. easily and stably fixed to the In this manner, the first substrate holder 63 has a reduced number of fixing portions 73 to be fixed with screws or the like, and the work for fixing the first substrate holder 63 is simplified.

また、固定部７３は、制御回路基板６１の厚み方向から見たときに、制御回路基板６１に積層された電源回路基板６２の外側に配置されている。すなわち、固定部７３は、電源回路基板６２によって隠されておらず、電源回路基板６２を支持する支持台６５が仕切り板８２ａに固定された状態で、固定部７３を固定するネジ等を操作することが可能になっている。電源回路基板６２を支持する支持台６５を仕切り板８２ａから取り外さずに、固定部７３からネジ等を取り外すことで、第１基板ホルダ６３を仕切り板８２ａから取り外すことが可能とされている。また、本実施例では、電源回路基板６２が、支持台６５に支持されることで制御回路基板６１に積層されているので、制御回路基板６１の厚み方向から見たときに、固定部７３が支持台６５から突出しており、固定部７３が支持台６５の外側に配置されている。これにより、支持台６５によって固定部７３が隠れないので、制御部５４を保守する際の固定部７３のネジ等の操作性を確保することが可能になり、制御部５４を保守する作業性が向上する。 The fixing portion 73 is arranged outside the power supply circuit board 62 laminated on the control circuit board 61 when viewed from the thickness direction of the control circuit board 61 . That is, the fixing portion 73 is not hidden by the power circuit board 62, and the screw or the like for fixing the fixing portion 73 is operated in a state where the support base 65 for supporting the power circuit board 62 is fixed to the partition plate 82a. is possible. The first substrate holder 63 can be removed from the partition plate 82a by removing screws or the like from the fixing portion 73 without removing the support base 65 that supports the power circuit board 62 from the partition plate 82a. In this embodiment, the power supply circuit board 62 is supported by the support base 65 and stacked on the control circuit board 61. Therefore, when viewed from the thickness direction of the control circuit board 61, the fixing portion 73 is It protrudes from the support base 65 , and the fixing portion 73 is arranged outside the support base 65 . As a result, since the fixing portion 73 is not hidden by the support base 65, it is possible to secure the operability of the screws of the fixing portion 73 when maintaining the control portion 54, and the workability of maintaining the control portion 54 is improved. improves.

第１基板ホルダ６３と同様に、第２基板ホルダ６４は、図示しないが、電源回路基板６２を支持する凹部を有しており、後述する支持台６５上に、ネジ等の締結部材によって固定される。凹部の内壁には、電源回路基板６２の外周部を保持する複数の保持爪が形成されている。凹部の底面には、電源回路基板６２の裏面を支持する複数の柱状の支持突起が所定間隔をあけて形成されている。また、第１基板ホルダ６３及び第２基板ホルダ６４は、例えば、ＡＢＳ樹脂等の樹脂材料によって形成されている。 Similarly to the first substrate holder 63, the second substrate holder 64 has a recessed portion for supporting the power supply circuit substrate 62 (not shown), and is fixed on a support base 65 (to be described later) with fastening members such as screws. be. A plurality of holding claws for holding the outer peripheral portion of the power circuit board 62 are formed on the inner wall of the recess. A plurality of columnar support projections for supporting the back surface of the power supply circuit board 62 are formed at predetermined intervals on the bottom surface of the recess. Also, the first substrate holder 63 and the second substrate holder 64 are made of, for example, a resin material such as ABS resin.

筐体５５の仕切り板８２ａは、第１基板ホルダ６３の第１係合爪７２が係合する第１開口７６を有しており、第１基板ホルダ６３の２つの第１係合爪７２に対応するように２つの第１開口７６が形成されている。第１開口７６は、第１係合爪７２を挿入可能な角穴として形成されている。第１開口７６に第１係合爪７２が係合された第１基板ホルダ６３は、筐体５５の仕切り板８２ａに沿って固定される。 The partition plate 82a of the housing 55 has a first opening 76 with which the first engaging claws 72 of the first substrate holder 63 are engaged. Two first openings 76 are formed correspondingly. The first opening 76 is formed as a square hole into which the first engaging claw 72 can be inserted. The first substrate holder 63 with the first engaging claws 72 engaged with the first openings 76 is fixed along the partition plate 82 a of the housing 55 .

第１基板ホルダ６３は、第１開口７６に係合された第１係合爪７２と、第１開口７６との接触箇所を回転中心として、いわゆるヒンジ構造のように、筐体５５の仕切り板８２ａに対して第１基板ホルダ６３を回動させることが可能となる。ここで、第１基板ホルダ６３が回動する方向は、第１基板ホルダ６３の他端６３ｂが仕切り板８２ａに対して接したり離れたりする方向を指す。角穴である第１開口７６内に、矩形板状の第１係合爪７２が挿入されることで、第１係合爪７２を回転中心として第１基板ホルダ６３の他端６３ｂが仕切り板８２ａに対して接したり離れたりする方向に回動し易くされる。その一方で、仕切り板８２ａに沿う面内方向（仕切り板８２ａ上）での、第１係合爪７２を回転中心とした第１基板ホルダ６３の両側への揺れが抑えられる。また、第１基板ホルダ６３は、２つの第１係合爪７２が２つの第１開口７６に係合されることで、仕切り板８２ａに沿う面内方向での、第１係合爪７２を回転中心とした第１基板ホルダ６３の両側への揺れが規制されている。 The first substrate holder 63 rotates around the contact point between the first engaging claw 72 engaged with the first opening 76 and the first opening 76, and rotates around the partition plate of the housing 55 like a so-called hinge structure. It becomes possible to rotate the first substrate holder 63 with respect to 82a. Here, the direction in which the first substrate holder 63 rotates refers to the direction in which the other end 63b of the first substrate holder 63 contacts or separates from the partition plate 82a. By inserting the rectangular plate-shaped first engaging claw 72 into the first opening 76 which is a square hole, the other end 63b of the first substrate holder 63 rotates about the first engaging claw 72 as a partition plate. It is made easy to rotate in the direction of coming in contact with or away from 82a. On the other hand, swinging of the first substrate holder 63 to both sides about the first engaging claw 72 in the in-plane direction (on the partition plate 82a) along the partition plate 82a is suppressed. In addition, the two first engaging claws 72 of the first substrate holder 63 are engaged with the two first openings 76, thereby moving the first engaging claws 72 in the in-plane direction along the partition plate 82a. Swinging to both sides of the first substrate holder 63 about the center of rotation is regulated.

図１６は、実施例における支持台６５の要部を拡大して示す斜視図である。図１０、図１１及び図１２に示すように、支持台６５は、複数の電源回路基板６２を支持する支持部６５ａと、支持部６５ａの両側に設けられて筐体５５の仕切り板８２ａに支持される一対の脚部６５ｂと、を有する。支持部６５ａは、複数の制御回路基板６１に跨って、複数の制御回路基板６１に積層されて配置されている。支持台６５は、例えば、金属材料によって形成されており、支持部６５ａが平板状に形成されている。図１０、図１２及び図１６に示すように、各脚部６５ｂは、筐体５５の仕切り板８２ａに係合する第２係合爪７７を有する。第２係合爪７７は、矩形板状に形成されており、矩形の短辺方向に沿って脚部６５ｂから突出している。支持台６５は、第２係合爪７７が、後述する第２開口７８に係合された状態で、各脚部６５ｂがネジ等の締結部材によって仕切り板８２ａに固定されている。 FIG. 16 is an enlarged perspective view showing a main part of the support base 65 in the embodiment. As shown in FIGS. 10, 11 and 12, the support base 65 includes a support portion 65a that supports the plurality of power supply circuit boards 62, and a partition plate 82a of the housing 55 provided on both sides of the support portion 65a. and a pair of legs 65b. The supporting portion 65 a is arranged so as to be stacked on the plurality of control circuit boards 61 so as to straddle the plurality of control circuit boards 61 . The support base 65 is made of, for example, a metal material, and has a flat support portion 65a. As shown in FIGS. 10, 12 and 16, each leg 65b has a second engaging claw 77 that engages with the partition plate 82a of the housing 55. As shown in FIGS. The second engaging claw 77 is formed in a rectangular plate shape and protrudes from the leg portion 65b along the short side direction of the rectangle. Each leg 65b of the support base 65 is fixed to the partition plate 82a by a fastening member such as a screw while the second engaging claw 77 is engaged with a second opening 78, which will be described later.

図１６に示すように、筐体５５の仕切り板８２ａは、脚部６５ｂの第２係合爪７７が係合する第２開口７８を有しており、支持台６５の２つの第２係合爪７７に対応するように２つの第２開口７８が形成されている。第２開口７８は、第２係合爪７７を挿入可能な角穴として形成されている。支持台６５は、第２開口７８に係合された第２係合爪７７と、第２開口７８との接触箇所を回転中心として、いわゆるヒンジ構造のように、筐体５５の仕切り板８２ａに対して支持台６５を回動させることが可能となる。ここで、支持台６５が回動する方向は、各脚部６５ｂが仕切り板８２ａに対して接したり離れたりする方向を指す。角穴である第２開口７８内に、矩形板状の第２係合爪７７が挿入されることで、第２係合爪７７を回転中心として支持台６５の各脚部６５ｂが仕切り板８２ａに対して接したり離れたりする方向に回動し易くされる。その一方で、仕切り板８２ａに沿う面内方向（仕切り板８２ａ上）での、第２係合爪７７を回転中心とした脚部６５ｂの両側への揺れが抑えられる。また、支持台６５は、各脚部６５ｂの２つの第２係合爪７７が２つの第２開口７８に係合されることで、仕切り板８２ａに沿う面内方向での、第２係合爪７７を回転中心とした支持台６５の両側への揺れが規制されている。 As shown in FIG. 16, the partition plate 82a of the housing 55 has a second opening 78 with which the second engaging claw 77 of the leg portion 65b engages, and two second engaging claws 77 of the support base 65 are provided. Two second openings 78 are formed to correspond to the claws 77 . The second opening 78 is formed as a square hole into which the second engaging claw 77 can be inserted. The support base 65 rotates about the contact point between the second engaging claw 77 engaged with the second opening 78 and the second opening 78, and is attached to the partition plate 82a of the housing 55 like a so-called hinge structure. On the other hand, it becomes possible to rotate the support base 65 . Here, the direction in which the support base 65 rotates refers to the direction in which each leg 65b contacts or separates from the partition plate 82a. By inserting the rectangular plate-shaped second engaging claw 77 into the second opening 78, which is a square hole, each leg portion 65b of the support base 65 rotates about the second engaging claw 77 as the partition plate 82a. It is made easy to rotate in the direction of coming into contact with or away from. On the other hand, the swinging of the leg portion 65b around the second engaging claw 77 in the in-plane direction (on the partition plate 82a) along the partition plate 82a is suppressed. Further, the support base 65 is configured such that the two second engaging claws 77 of each leg portion 65b are engaged with the two second openings 78, so that the second engaging claws 77 are engaged in the in-plane direction along the partition plate 82a. Swinging to both sides of the support base 65 about the claw 77 is regulated.

また、筐体５５の仕切り板８２ａにおいて、第２開口７８は、第１基板ホルダ６３の一端６３ａから他端６３ｂに延びる方向における一端６３ａ側に配置される。つまり、支持台６５の第２係合爪７７は、第１基板ホルダ６３の第１係合爪７２と、仕切り板８２ａの同じ側に位置する。これにより、第２係合爪７７まわりに回動する電源回路基板６２の支持台６５と、第１係合爪７２まわりに回動する制御回路基板６１の第１基板ホルダ６３とを、同一方向に回動させることが可能になり、制御部５４を保守する作業性が向上する。 In addition, in the partition plate 82a of the housing 55, the second opening 78 is arranged on the one end 63a side in the direction extending from the one end 63a of the first substrate holder 63 to the other end 63b. In other words, the second engaging claws 77 of the support base 65 are positioned on the same side of the partition plate 82a as the first engaging claws 72 of the first substrate holder 63 . As a result, the support base 65 for the power circuit board 62 rotating around the second engaging claws 77 and the first board holder 63 for the control circuit board 61 rotating around the first engaging claws 72 are moved in the same direction. It is possible to rotate the control unit 54 in the direction of rotation, and the workability of maintaining the control unit 54 is improved.

（制御回路基板及び電源回路基板の保守）
以上のように構成された制御部５４について、制御回路基板６１及び電源回路基板６２を保守する際の分解操作を説明する。まず、筐体５５から蓋体５７を取り外すことで、基板収容空間５６Ｃを開く。基板収容空間５６Ｃが開かれることで、複数の電源回路基板６２を保守する作業が可能になる。例えば、電源回路基板６２を交換する場合には、支持台６５上に固定された第２基板ホルダ６４から電源回路基板６２が取り外されて交換される。 (Maintenance of control circuit board and power supply circuit board)
The disassembly operation for maintenance of the control circuit board 61 and the power supply circuit board 62 will be described for the control unit 54 configured as described above. First, by removing the cover 57 from the housing 55, the board accommodation space 56C is opened. By opening the board accommodation space 56C, maintenance work for the plurality of power supply circuit boards 62 becomes possible. For example, when replacing the power circuit board 62, the power circuit board 62 is removed from the second board holder 64 fixed on the support table 65 and replaced.

次に、制御回路基板６１を保守するときには、支持台６５の各脚部６５ｂを固定するネジ等が取り外されて、各脚部６５ｂが仕切り板８２ａから引き離し可能にされる。続いて、脚部６５ｂの第２係合爪７７が第２開口７８に係合させた状態で、図１１に示すように、脚部６５ｂを仕切り板８２ａから離れるように、支持台６５全体を仕切り板８２ａに対して回動させることで、支持台６５の下方に隠れていた制御回路基板６１が現れる。これにより、複数の電源回路基板６２を支持する支持台６５を筐体５５から取り外すことなく、仕切り板８２ａに固定された複数の制御回路基板６１を保守する作業を行うことが可能になる。 Next, when maintaining the control circuit board 61, the screws or the like fixing the legs 65b of the support base 65 are removed so that the legs 65b can be separated from the partition plate 82a. Subsequently, with the second engaging claws 77 of the leg portion 65b engaged with the second opening 78, as shown in FIG. By rotating with respect to the partition plate 82a, the control circuit board 61 hidden under the support base 65 appears. Thus, it is possible to maintain the plurality of control circuit boards 61 fixed to the partition plate 82a without removing the support base 65 that supports the plurality of power supply circuit boards 62 from the housing 55. FIG.

また、例えば、制御回路基板６１を交換する場合には、仕切り板８２ａに固定された第１基板ホルダ６３から制御回路基板６１が取り外されて交換される。あるいは、第１基板ホルダ６３の固定部７３からネジ等を取り外し、第１開口７６に係合された第１係合爪７２を回転中心として第１基板ホルダ６３が仕切り板８２ａから離れる方向に回動させると共に、第１開口７６から第１係合爪７２を引き抜くことで、仕切り板８２ａから第１基板ホルダ６３が容易に取り外される。 Further, for example, when replacing the control circuit board 61, the control circuit board 61 is removed from the first board holder 63 fixed to the partition plate 82a and replaced. Alternatively, the screw or the like is removed from the fixing portion 73 of the first substrate holder 63, and the first substrate holder 63 is rotated about the first engaging claw 72 engaged with the first opening 76 in the direction away from the partition plate 82a. By moving and pulling out the first engaging claws 72 from the first openings 76, the first substrate holder 63 can be easily removed from the partition plate 82a.

このように第１基板ホルダ６３を取り外すために、仕切り板８２ａに固定された支持台６５の外側から第１基板ホルダ６３の固定部７３を視認可能になっており、支持台６５が仕切り板８２ａに固定された状態で固定部７３に対してネジ等を着脱する操作を容易に行うことができる。そして、支持台６５は、第１基板ホルダ６３を仕切り板８２ａから取り外すために第１基板ホルダ６３を適正に回動させることが可能になるように、仕切り板８２ａに固定された第１基板ホルダ６３の上方に所定の間隙が確保されて仕切り板８２ａに固定されている。 In order to remove the first substrate holder 63 in this manner, the fixed portion 73 of the first substrate holder 63 can be visually recognized from the outside of the support base 65 fixed to the partition plate 82a. It is possible to easily perform an operation for attaching and detaching a screw or the like to/from the fixing portion 73 in a state where the fixing portion 73 is fixed. The support base 65 is fixed to the partition plate 82a so that the first substrate holder 63 can be properly rotated in order to remove the first substrate holder 63 from the partition plate 82a. It is fixed to the partition plate 82a with a predetermined gap secured above the 63. As shown in FIG.

また、第１基板ホルダ６３を仕切り板８２ａに固定する場合、第１係合爪７２を第１開口７６に引っ掛ける際に、第１係合爪７２が突出する方向が、仕切り板８２ａに対して鋭角をなすように傾斜させた姿勢で、第１係合爪７２を第１開口７６に挿入する。これにより、第１基板ホルダ６３は、仕切り板８２ａに一時的に固定された後、固定部７３がネジ等で固定されることで、仕切り板８２ａに容易に固定される。 Further, when the first substrate holder 63 is fixed to the partition plate 82a, the direction in which the first engagement claws 72 protrude when the first engagement claws 72 are hooked on the first openings 76 is different from the partition plate 82a. The first engaging claw 72 is inserted into the first opening 76 in a posture inclined to form an acute angle. As a result, the first substrate holder 63 is temporarily fixed to the partition plate 82a, and then fixed to the partition plate 82a easily by fixing the fixing portion 73 with a screw or the like.

なお、本実施例では、第１基板ホルダ６３に第１係合爪７２が設けられると共に、筐体５５の仕切り板８２ａに第１開口７６が設けられたが、この構造とは逆に、第１基板ホルダ６３に第１開口が設けられると共に、筐体５５の仕切り板８２ａに第１係合爪が設けられてもよい。同様に、本実施例では、支持台６５の脚部６５ｂに第２係合爪７７が設けられると共に、筐体５５の仕切り板８２ａに第２開口７８が設けられたが、この構造とは逆に、支持台６５の脚部６５ｂに第２開口が設けられると共に、筐体５５の仕切り板８２ａに第２係合爪が設けられてもよい。 In this embodiment, the first substrate holder 63 is provided with the first engaging claw 72 and the partition plate 82a of the housing 55 is provided with the first opening 76. A first opening may be provided in the one-substrate holder 63 and a first engaging claw may be provided in the partition plate 82a of the housing 55 . Similarly, in the present embodiment, the leg portion 65b of the support base 65 is provided with the second engaging claw 77 and the partition plate 82a of the housing 55 is provided with the second opening 78, but this structure is reversed. In addition, the leg portion 65b of the support base 65 may be provided with a second opening, and the partition plate 82a of the housing 55 may be provided with a second engaging claw.

（冷暖切換装置の特徴的な構成）
次に、実施例の冷暖切換装置１の特徴的な構造について説明する。実施例における特徴的な構造には、駆動部５２の開閉機構５３、制御部５４の制御回路基板６１及び電源回路基板６２の相互の配置、筐体５５の構造が含まれる。 (Characteristic configuration of cooling/heating switching device)
Next, a characteristic structure of the cooling/heating switching device 1 of the embodiment will be described. Characteristic structures in the embodiment include the mutual arrangement of the opening/closing mechanism 53 of the drive unit 52 , the control circuit board 61 and the power circuit board 62 of the control unit 54 , and the structure of the housing 55 .

図１７は、実施例における開閉機構５３（図７、図８参照）、制御回路基板６１、電源回路基板６２の各位置を説明するための分解斜視図である。また、図１７では、１つの室内機５に対応する４つの開閉機構５３毎に破線で囲んで示し、２つの室内機５に対応する１つの制御回路基板６１毎に破線で囲んで示し、４つの室内機５に対応する１つの電源回路基板６２を破線で囲んで示す。 FIG. 17 is an exploded perspective view for explaining positions of the opening/closing mechanism 53 (see FIGS. 7 and 8), the control circuit board 61, and the power circuit board 62 in the embodiment. In FIG. 17, each four open/close mechanisms 53 corresponding to one indoor unit 5 are surrounded by broken lines, and each control circuit board 61 corresponding to two indoor units 5 is surrounded by broken lines. One power supply circuit board 62 corresponding to one indoor unit 5 is surrounded by a dashed line.

図１７に示すように、本実施例では、複数の室内機５のうちの任意の１つの室内機５に対応する４つの開閉機構５３と、この１つの室内機５に対応する１つの制御回路基板６１及び１つの電源回路基板６２は、制御回路基板６１及び電源回路基板６２の厚み方向から見たときに、筐体５５内の一方向Ａにおいて互いに重なるように配置される。このため、筐体５５内の駆動部５２及び制御部５４を保守するときに、保守対象となる任意の１つの室内機５にそれぞれ対応する４つの開閉機構５３、１つの制御回路基板６１、１つの電源回路基板６２をそれぞれ見付け出し易くなり、保守の作業性が向上する。 As shown in FIG. 17, in this embodiment, four opening/closing mechanisms 53 corresponding to any one indoor unit 5 out of a plurality of indoor units 5 and one control circuit corresponding to this one indoor unit 5 The board 61 and one power circuit board 62 are arranged so as to overlap each other in one direction A within the housing 55 when viewed from the thickness direction of the control circuit board 61 and the power circuit board 62 . Therefore, when performing maintenance on the driving unit 52 and the control unit 54 in the housing 55, the four opening/closing mechanisms 53 and one control circuit board 61, 1 each corresponding to an arbitrary indoor unit 5 to be maintained are maintained. It becomes easy to find each power supply circuit board 62, and the workability of maintenance is improved.

図１８は、実施例における駆動部５２に設けられた取付け金具を示す斜視図である。図１９は、実施例における取付け金具を拡大して示す斜視図である。図２０は、実施例における筐体５５の要部を示す縦断面図である。 FIG. 18 is a perspective view showing a mounting bracket provided on the driving portion 52 in the embodiment. FIG. 19 is a perspective view showing an enlarged mounting bracket in the embodiment. FIG. 20 is a vertical cross-sectional view showing the essential parts of the housing 55 in the example.

また、筐体５５は、図１７に示すように、第１筐体としての開閉機構箱８１と、第２筐体としての電装品箱８２と、を含む。図１８、図１９及び図２０に示すように、開閉機構箱８１は、各開閉機構５３を支持すると共に配管収容空間５６Ａと機構収容空間５６Ｂとを仕切る仕切り板８１ａと、開閉機構箱８１から取り外された電装品箱８２を開閉機構箱８１に係合させる係合部材としての取付け金具８５と、を有する。電装品箱８２は、図１７及び図２０に示すように、基板収容空間５６Ｃと機構収容空間５６Ｂとを仕切る仕切り板８２ａを有する。 Further, as shown in FIG. 17, the housing 55 includes an opening/closing mechanism box 81 as a first housing and an electrical equipment box 82 as a second housing. As shown in FIGS. 18, 19 and 20, the opening/closing mechanism box 81 includes a partition plate 81a that supports each opening/closing mechanism 53 and separates the pipe housing space 56A and the mechanism housing space 56B, and the opening/closing mechanism box 81. and a fitting 85 as an engaging member for engaging the electrical component box 82 with the open/close mechanism box 81 . As shown in FIGS. 17 and 20, the electrical component box 82 has a partition plate 82a that separates the board accommodation space 56C and the mechanism accommodation space 56B.

取付け金具８５は、開閉機構箱８１内の下部に設けられている。取付け金具８５は、一端部８５ａが、開閉機構箱８１の仕切り板８１ａに固定されており、他端部８５ｂが開閉機構箱８１内の下部に固定されている。取付け金具８５の他端部８５ｂには、上方に向かって一端部８６ａが曲げられたＬ字状の吊り下げ片８６が固定されている。取付け金具８５には、吊り下げ片８６が含まれる。吊り下げ片８６は、例えば、溶接やビス止め等によって他端部８５ｂに固定されており、一端部８６ａが、電装品箱８２の仕切り板８２ａにネジ等によって着脱可能に固定されている。取付け金具８５によって開閉機構箱８１に電装品箱８２が固定されることで、１つの室内機５に対応する４つの開閉機構５３と、この１つの室内機５に対応する１つの制御回路基板６１及び１つの電源回路基板６２とが、筐体５５内の一方向Ａにおいて互いに重なるように配置される。 The mounting bracket 85 is provided at the lower part inside the opening/closing mechanism box 81 . One end 85 a of the mounting bracket 85 is fixed to the partition plate 81 a of the opening/closing mechanism box 81 , and the other end 85 b is fixed to the lower part of the opening/closing mechanism box 81 . An L-shaped hanging piece 86 having one end portion 86a bent upward is fixed to the other end portion 85b of the mounting bracket 85 . The mounting bracket 85 includes a hanging piece 86 . The hanging piece 86 is fixed to the other end portion 85b by, for example, welding or screwing, and the one end portion 86a is detachably fixed to the partition plate 82a of the electrical component box 82 by screws or the like. By fixing the electric component box 82 to the opening/closing mechanism box 81 with the mounting bracket 85, four opening/closing mechanisms 53 corresponding to one indoor unit 5 and one control circuit board 61 corresponding to this one indoor unit 5 are provided. and one power supply circuit board 62 are arranged so as to overlap each other in one direction A within the housing 55 .

また、取付け金具８５は、他端部８５ａが、開閉機構箱８１における下部よりも電装品箱８２の仕切り板８２ａ側に突出して設けられている。このため、取付け金具８５に固定するために電装品箱８２の仕切り板８２ａの形状が複雑化すことが避けられ、仕切り板８２ａを平板のままで用いることが可能になるので、電装品箱８２の加工コストが抑えられる。なお、図示しないが、取付け金具８５の一部が、電装品箱８２側に突出するような形状であればよく、本実施例と同様の作用、効果が得られる。 The mounting bracket 85 is provided with the other end 85 a protruding from the lower part of the opening/closing mechanism box 81 toward the partition plate 82 a of the electrical component box 82 . For this reason, it is possible to avoid complicating the shape of the partition plate 82a of the electrical component box 82 in order to fix it to the mounting bracket 85, and it is possible to use the partition plate 82a as it is as a flat plate. Reduces processing costs. Although not shown, the mounting bracket 85 may have any shape as long as it protrudes toward the electrical component box 82, and the same effects and effects as those of the present embodiment can be obtained.

また、開閉機構箱８１内の上部には、電装品箱８２を支持する吊り下げ金具８７が設けられている。吊り下げ金具８７は、一端部８７ａが開閉機構箱８１の仕切り板８１ａに固定されており、他端部８７ｂが、上方に向かって曲げられている。電装品箱８２の上部には、吊り下げ金具８７の他端部８７ｂに引っ掛けられる引っ掛け片８８が設けられている。また、引っ掛け片８８は、電装品箱８２を開閉機構箱８１から取り外したときに、取付け金具８５の吊り下げ片８６の一端部８６ａに引っ掛けることが可能に構成されている。つまり、引っ掛け片８８を有する取付け金具８５は、電装品箱８２が開閉機構箱８１の内部を塞ぐように固定するための金具と、電装品箱８２の内部と開閉機構箱８１の内部を開いた状態で電装品箱８２を開閉機構箱８１に吊り下げるための金具とを兼ねている。 Moreover, a hanging metal fitting 87 for supporting the electric component box 82 is provided in the upper part of the opening/closing mechanism box 81 . One end portion 87a of the hanging metal fitting 87 is fixed to the partition plate 81a of the opening/closing mechanism box 81, and the other end portion 87b is bent upward. A hooking piece 88 to be hooked on the other end portion 87b of the hanging metal fitting 87 is provided on the upper portion of the electrical component box 82 . The hooking piece 88 is configured to be hooked to one end portion 86a of the hanging piece 86 of the mounting bracket 85 when the electrical component box 82 is removed from the opening/closing mechanism box 81 . That is, the mounting metal fittings 85 having the hooking pieces 88 are metal fittings for fixing the electrical component box 82 so as to block the inside of the switching mechanism box 81, and open the inside of the electrical component box 82 and the inside of the switching mechanism box 81. It also serves as a metal fitting for hanging the electric component box 82 from the opening/closing mechanism box 81 in the state.

なお、開閉機構箱８１と電装品箱８２との固定構造及び一時的な吊り下げ構造が取付け金具８５に限定されるものではない。取付け金具８５は、開閉機構箱８１側に設けられたが、電装品箱８２側に設けられた構造や、開閉機構箱８１と電装品箱８２の両方に互いに係合するように設けられた構造であってもよい。 The fixing structure and temporary hanging structure between the switch mechanism box 81 and the electrical component box 82 are not limited to the mounting metal fittings 85 . Although the mounting bracket 85 is provided on the opening/closing mechanism box 81 side, it may be provided on the electrical component box 82 side, or may be provided on both the opening/closing mechanism box 81 and the electrical component box 82 so as to engage with each other. may be

（冷暖切換装置を保守する状態）
図２１は、実施例において駆動部５２及び制御部５４を保守する状態を示す正面図である。以上のように構成された冷暖切換装置１を保守する際には、図２１に示すように、電装品箱８２から蓋体５７を取り外し、電装品箱８２の内部の各制御回路基板６１及び各電源回路基板６２の一群と、開閉機構箱８１の内部の各開閉機構５３の一群とが上下に並ぶように、上述した取付け金具８５の吊り下げ片８６に電装品箱８２の引っ掛け片８８を引っ掛けて吊り下げる。このとき、開閉機構箱８１内の各開閉機構５３と、電装品箱８２内の各制御回路基板６１及び各電源回路基板６２は、複数の接続配線（図示せず）を介して電気的に接続された状態が保たれている。 (Condition for maintenance of cooling/heating switching device)
FIG. 21 is a front view showing a state of maintenance of the drive unit 52 and the control unit 54 in the embodiment. When maintaining the cooling/heating switching device 1 configured as described above, as shown in FIG. A hooking piece 88 of the electrical component box 82 is hooked to the hanging piece 86 of the mounting bracket 85 so that the group of the power supply circuit boards 62 and the group of the opening/closing mechanisms 53 inside the opening/closing mechanism box 81 are aligned vertically. hang it down. At this time, each opening/closing mechanism 53 in the opening/closing mechanism box 81 and each control circuit board 61 and each power supply circuit board 62 in the electrical component box 82 are electrically connected via a plurality of connection wirings (not shown). maintained as it was.

このように電装品箱８２を開閉機構箱８１に一時的に引っ掛けることにより、駆動部５２及び制御部５４を保守するときに、開閉機構箱８１内の各開閉機構５３の一群と、電装品箱８２内の各制御回路基板６１及び各電源回路基板６２の一群とが、上下に隣り合うように配置することができる。このため、開閉機構箱８１内の複数の開閉機構５３及び電装品箱８２内の複数の制御回路基板６１及び複数の電源回路基板６２の中から、保守対象となる任意の１つの室内機５にそれぞれ対応する４つの開閉機構５３、１つの制御回路基板６１、１つの電源回路基板６２をそれぞれ見付け出し易くなると共に、１つの室内機５に対応する各開閉機構５３、制御回路基板６１及び電源回路基板６２を相互に確認し易くなるので、保守の作業性が向上する。 By temporarily hooking the electrical component box 82 to the opening/closing mechanism box 81 in this way, when performing maintenance on the driving unit 52 and the control unit 54, a group of opening/closing mechanisms 53 in the opening/closing mechanism box 81 and the electrical component box can be A group of each control circuit board 61 and each power circuit board 62 in 82 can be arranged so as to be vertically adjacent to each other. Therefore, from among the plurality of opening/closing mechanisms 53 in the opening/closing mechanism box 81 and the plurality of control circuit boards 61 and the plurality of power supply circuit boards 62 in the electrical component box 82, any one indoor unit 5 to be maintained It becomes easy to find the corresponding four opening/closing mechanisms 53, one control circuit board 61, and one power supply circuit board 62, and each opening/closing mechanism 53, control circuit board 61, and power supply circuit corresponding to one indoor unit 5 Since the substrates 62 can be easily checked with each other, the workability of maintenance is improved.

（駆動部及び制御部の表示部材）
図２２は、実施例における開閉機構５３の識別ラベル、配置ラベル及び電源回路基板６２のコネクタラベルを示す正面図である。図２３は、実施例における制御回路基板６１のコネクタラベルを示す正面図である。図２３は、電源回路基板６２を電装品箱８２から取り外した状態を示している。 (Display member of drive unit and control unit)
FIG. 22 is a front view showing an identification label, an arrangement label, and a connector label of the power supply circuit board 62 of the opening/closing mechanism 53 in the embodiment. FIG. 23 is a front view showing the connector label of the control circuit board 61 in the embodiment. FIG. 23 shows the state where the power circuit board 62 is removed from the electrical component box 82 .

また、開閉機構箱８１には、図２２に示すように、複数の開閉機構５３が、任意の１つの室内機５に対応する４つの開閉機構５３毎に集めて配置されており、この４つの開閉機構５３の近傍に、この４つの開閉機構５３が任意の１つの室内機５に対応することを示す第１表示部材としての識別ラベル９１Ａ及び配置ラベル９１Ｂが設けられている。このため、識別ラベル９１Ａ及び配置ラベル９１Ｂを確認することで、所望の開閉機構５３を更に見付け易くなる。図２２において、１つの室内機５に対応する４つの開閉機構５３を破線と囲んで示す。 Further, in the opening/closing mechanism box 81, as shown in FIG. 22, a plurality of opening/closing mechanisms 53 are collectively arranged for every four opening/closing mechanisms 53 corresponding to any one indoor unit 5. In the vicinity of the opening/closing mechanism 53, an identification label 91A and an arrangement label 91B are provided as first display members indicating that the four opening/closing mechanisms 53 correspond to any one indoor unit 5. FIG. Therefore, by confirming the identification label 91A and the placement label 91B, it becomes easier to find the desired opening/closing mechanism 53 . In FIG. 22, four opening/closing mechanisms 53 corresponding to one indoor unit 5 are shown surrounded by dashed lines.

例えば、識別ラベル９１Ａは、各室内機５を示す記号等を含んでおり、室内機５毎にそれぞれ設けられている。識別ラベル９１Ａは、例えば、開閉機構箱８１内の上部の枠等の視認し易い位置に貼り付けられている。例えば、配置ラベル９１Ｂは、各室内機５を示す記号等や、１つの室内機５に対応する４つの開閉機構５３の、開閉機構箱８１内における位置を示す配置図を含んでいる。配置ラベル９１Ｂは、開閉機構箱８１の仕切り板８１ａの内面の下部等の視認し易い位置に貼り付けられている。 For example, the identification label 91</b>A includes a symbol or the like indicating each indoor unit 5 and is provided for each indoor unit 5 . The identification label 91A is affixed to an easily visible position such as an upper frame in the opening/closing mechanism box 81, for example. For example, the layout label 91B includes a symbol indicating each indoor unit 5 and a layout diagram indicating the positions of the four opening/closing mechanisms 53 corresponding to one indoor unit 5 in the opening/closing mechanism box 81 . The placement label 91B is affixed to an easily visible position such as the lower part of the inner surface of the partition plate 81a of the opening/closing mechanism box 81. As shown in FIG.

また、電装品箱８２内には、任意の１つの室内機５に対応する制御回路基板６１と電源回路基板６２が、積層されて配置されている。電源回路基板６２は、複数の室内機５に対応する複数の接続端子６２ａを有しており、各接続端子６２ａの近傍に、接続端子６２ａに対応する室内機５を示す第２表示部材としてのコネクタラベル９２が設けられる、同様に、制御回路基板６１は、複数の室内機５に対応する複数の接続端子６１ａを有しており、各接続端子６１ａの近傍に、接続端子６１ａに対応する室内機５を示す第３表示部材としてコネクタラベル９３が設けられる。このため、コネクタラベル９２、９３を確認することで、所望の接続端子６１ａ、６２ａを更に見付け易くなる。 In the electric component box 82, a control circuit board 61 and a power supply circuit board 62 corresponding to any one indoor unit 5 are stacked and arranged. The power circuit board 62 has a plurality of connection terminals 62a corresponding to the plurality of indoor units 5, and near each connection terminal 62a, the indoor unit 5 corresponding to the connection terminal 62a is shown as a second display member. Similarly, the control circuit board 61 has a plurality of connection terminals 61a corresponding to the plurality of indoor units 5, on which the connector label 92 is provided. A connector label 93 is provided as a third display member for indicating the machine 5 . Therefore, by checking the connector labels 92 and 93, it becomes easier to find the desired connection terminals 61a and 62a.

コネクタラベル９２、９３は、各室内機５を示す記号等を含んでおり、室内機５毎にそれぞれ設けられている。なお、第１表示部材、第２表示部材及び第３表示部材としては、上述の識別ラベル９１Ａ、配置ラベル９１Ｂ、コネクタラベル９２、９３に限定されず、例えば、各種のタグや、開閉機構５３や制御回路基板６１上に印字した表示や、電装品箱８２の仕切り板８２ａ、支持台６５に印字や刻印した表示や、このような表示を含む構造部材であってもよい。 The connector labels 92 and 93 include a symbol or the like indicating each indoor unit 5 and are provided for each indoor unit 5 . The first display member, the second display member, and the third display member are not limited to the identification label 91A, the placement label 91B, and the connector labels 92 and 93 described above. A display printed on the control circuit board 61, a display printed or stamped on the partition plate 82a of the electrical component box 82, the support base 65, or a structural member including such a display may be used.

なお、開閉機構５３、制御回路基板６１及び電源回路基板６２は、室内機５毎に対応する領域が色分けされたり、各領域の境界に区分線（図示せず）が設けられたりしてもよい。また、例えば、１つの電源回路基板６２に対応する４つの室内機５毎にそれぞれ対応する１６個の開閉機構５３、１つの電源回路基板６２、２つの制御回路基板６１を１つのグループとするように、仕切り板８１ａ等に区分線（図示せず）が引かれてもよく、隣り合うグループの境目に隣り合う開閉機構５３同士等の間で保守作業の間違いが生じることを更に防ぐことが可能になる。 In the opening/closing mechanism 53, the control circuit board 61, and the power circuit board 62, areas corresponding to each indoor unit 5 may be color-coded, or division lines (not shown) may be provided at the boundaries of each area. . Further, for example, 16 opening/closing mechanisms 53, one power circuit board 62, and two control circuit boards 61 corresponding to four indoor units 5 corresponding to one power circuit board 62 are grouped. In addition, a dividing line (not shown) may be drawn on the partition plate 81a, etc., and it is possible to further prevent mistakes in maintenance work between the opening and closing mechanisms 53 adjacent to each other at the boundaries of adjacent groups. become.

（空気調和装置の動作）
冷暖切換装置１は、室内機５－１に冷房運転を行わせる場合、室内機５－１に対応する配管群２４－１の第１開閉弁３１を開き、配管群２４－１の第２開閉弁３２を閉じることにより、低圧ガス管６を室内機側ガス管１２－１に接続する。このとき、液管８を流れる高圧液相冷媒は、室内機液管１１－１を介して室内機５－１に供給されて、室内機５－１から室内機側ガス管１２－１を介して流出される低圧気相冷媒が、低圧ガス管６に供給される。冷暖切換装置１は、室内機５－１に暖房運転を行わせる場合、配管群２４－１の第１開閉弁３１を閉じて、配管群２４－１の第２開閉弁３２を開くことにより、高圧ガス管７を室内機側ガス管１２－１に接続する。このとき、高圧ガス管７を流れる高圧気相冷媒は、室内機側ガス管１２－１を介して室内機５－１に供給されて、室内機５－１から室内機液管１１－１を介して流出される低圧二相冷媒が、液管８に供給される。 (Operation of air conditioner)
When the indoor unit 5-1 is caused to perform cooling operation, the cooling/heating switching device 1 opens the first opening/closing valve 31 of the pipe group 24-1 corresponding to the indoor unit 5-1, and opens and closes the second opening/closing of the pipe group 24-1. By closing the valve 32, the low pressure gas pipe 6 is connected to the indoor unit side gas pipe 12-1. At this time, the high-pressure liquid-phase refrigerant flowing through the liquid pipe 8 is supplied to the indoor unit 5-1 through the indoor unit liquid pipe 11-1, and from the indoor unit 5-1 through the indoor unit side gas pipe 12-1. The low-pressure vapor phase refrigerant flowing out through the low-pressure gas pipe 6 is supplied to the low-pressure gas pipe 6 . When the indoor unit 5-1 performs heating operation, the cooling/heating switching device 1 closes the first on-off valve 31 of the pipe group 24-1 and opens the second on-off valve 32 of the pipe group 24-1. The high pressure gas pipe 7 is connected to the indoor unit side gas pipe 12-1. At this time, the high-pressure gas-phase refrigerant flowing through the high-pressure gas pipe 7 is supplied to the indoor unit 5-1 through the indoor unit side gas pipe 12-1, and flows from the indoor unit 5-1 to the indoor unit liquid pipe 11-1. The liquid pipe 8 is supplied with a low-pressure two-phase refrigerant flowing out through.

配管群２４－１の第３開閉弁３３と第４開閉弁３４は、第１開閉弁３１と第２開閉弁３２が開閉するときに配管群２４－１を流れる冷媒の圧力が均圧されるように、すなわち、第１開閉弁３１と第２開閉弁３２が適切に開閉されるように、開閉される。冷暖切換装置１は、複数の室内機５－１～５－４のうちの室内機５－１と異なる他の室内機１５－２～１５－４に冷房運転または暖房運転を行わせるときも、配管群２４－１と同様に、複数の配管群２４－１～２４－１２を動作させる。 The third on-off valve 33 and the fourth on-off valve 34 of the pipe group 24-1 equalize the pressure of the refrigerant flowing through the pipe group 24-1 when the first on-off valve 31 and the second on-off valve 32 are opened and closed. , that is, the first on-off valve 31 and the second on-off valve 32 are opened and closed appropriately. When the cooling/heating switching device 1 causes the other indoor units 15-2 to 15-4, which are different from the indoor unit 5-1 among the plurality of indoor units 5-1 to 5-4, to perform the cooling operation or the heating operation, As with the pipe group 24-1, a plurality of pipe groups 24-1 to 24-12 are operated.

室内機５－１は、冷暖切換装置１から室内機液管１１－１を介して高圧液相冷媒が供給されることにより、冷房運転が行われる。このとき、室内機５－１の膨張弁は、室内機液管１１－１を介して供給される高圧液相冷媒を膨張させて、高圧液相冷媒から液リッチ状態の低圧二相冷媒を生成する。室内機５－１の室内熱交換器は、凝縮器として機能する。すなわち、室内熱交換器は、低圧二相冷媒と室内の空気とを熱交換することにより、室内の空気を冷却し、低圧二相冷媒の圧力が一定のまま低圧二相冷媒の乾き度を上げ、低圧二相冷媒から過熱状態の低圧気相冷媒を生成する。 The indoor unit 5-1 is supplied with high-pressure liquid-phase refrigerant from the cooling/heating switching device 1 through the indoor unit liquid pipe 11-1, thereby performing cooling operation. At this time, the expansion valve of the indoor unit 5-1 expands the high-pressure liquid-phase refrigerant supplied through the indoor unit liquid pipe 11-1 to generate a liquid-rich low-pressure two-phase refrigerant from the high-pressure liquid-phase refrigerant. do. The indoor heat exchanger of the indoor unit 5-1 functions as a condenser. That is, the indoor heat exchanger cools the indoor air by exchanging heat between the low-pressure two-phase refrigerant and the indoor air, and increases the dryness of the low-pressure two-phase refrigerant while maintaining the pressure of the low-pressure two-phase refrigerant constant. , to generate a superheated low-pressure vapor-phase refrigerant from the low-pressure two-phase refrigerant.

室内機５－１は、冷暖切換装置１から室内機側ガス管１２－１を介して高圧気相冷媒が供給されることにより、暖房運転が行われる。このとき、室内機５－１の室内熱交換器は、凝縮器として機能する。すなわち、室内熱交換器は、高圧気相冷媒と室内の空気とを熱交換することにより、室内の空気を加熱し、高圧気相冷媒の圧力が一定のまま高圧気相冷媒を冷却し、高圧気相冷媒の乾き度を下げ、高圧液相冷媒を生成する。室内機５－１の膨張弁は、高圧液相冷媒を膨張させ、高圧液相冷媒から液リッチ状態の低圧二相冷媒を生成する。 The indoor unit 5-1 is supplied with the high-pressure vapor-phase refrigerant from the cooling/heating switching device 1 through the indoor unit-side gas pipe 12-1, whereby heating operation is performed. At this time, the indoor heat exchanger of the indoor unit 5-1 functions as a condenser. That is, the indoor heat exchanger heats the indoor air by exchanging heat between the high-pressure gas-phase refrigerant and the indoor air, cools the high-pressure gas-phase refrigerant while maintaining the pressure of the high-pressure gas-phase refrigerant constant, and cools the high-pressure gas-phase refrigerant. It reduces the dryness of the vapor phase refrigerant to generate a high pressure liquid phase refrigerant. The expansion valve of the indoor unit 5-1 expands the high-pressure liquid-phase refrigerant to generate a liquid-rich low-pressure two-phase refrigerant from the high-pressure liquid-phase refrigerant.

複数の室内機５－１～５－４のうちの室内機５－１と異なる他の室内機５－２～５－４も、室内機５－１と同様に、冷房運転が行われたり、暖房運転が行われたりする。 Among the plurality of indoor units 5-1 to 5-4, the other indoor units 5-2 to 5-4 different from the indoor unit 5-1 also perform cooling operation, Heating operation is performed.

また、複数の室外機３－１～３－２のうちの室外機３－１の四方弁は、冷房運転が行われる室内機に利用される冷媒の量が、暖房運転が行われる室内機に利用される冷媒の量より多いときに、第１モードに切り換えられる。このとき、低圧ガス管６を流れる低圧気相冷媒は、圧縮機に供給され、室外機３－１の圧縮機で圧縮された高圧気相冷媒は、高圧ガス管７に供給されて、四方弁を介して室外熱交換器に供給される。室外機３－１の室外熱交換器は、凝縮器として動作する。すなわち、室外熱交換器は、室外機３－１の圧縮機から四方弁を介して供給された高圧気相冷媒と外気とを熱交換することにより、高圧気相冷媒の圧力が一定のまま高圧気相冷媒を冷却し、高圧気相冷媒の乾き度を下げ、高圧液相冷媒を生成する。高圧液相冷媒は、液管８に供給される。圧縮機は、低圧ガス管６を流れる低圧気相冷媒を圧縮し、低圧気相冷媒から過熱状態の高圧気相冷媒を生成する。 Further, the four-way valve of the outdoor unit 3-1 among the plurality of outdoor units 3-1 to 3-2 is such that the amount of refrigerant used in the indoor unit performing the cooling operation is adjusted to the amount of the refrigerant used in the indoor unit performing the heating operation. The first mode is switched to when the amount of refrigerant utilized is greater. At this time, the low-pressure gas-phase refrigerant flowing through the low-pressure gas pipe 6 is supplied to the compressor, and the high-pressure gas-phase refrigerant compressed by the compressor of the outdoor unit 3-1 is supplied to the high-pressure gas pipe 7, and the four-way valve supplied to the outdoor heat exchanger via The outdoor heat exchanger of the outdoor unit 3-1 operates as a condenser. That is, the outdoor heat exchanger exchanges heat between the high-pressure gas-phase refrigerant supplied from the compressor of the outdoor unit 3-1 through the four-way valve and the outside air, so that the pressure of the high-pressure gas-phase refrigerant remains constant. The vapor phase refrigerant is cooled, the dryness of the high pressure vapor phase refrigerant is reduced, and a high pressure liquid phase refrigerant is generated. A high-pressure liquid-phase refrigerant is supplied to the liquid pipe 8 . The compressor compresses the low-pressure vapor-phase refrigerant flowing through the low-pressure gas pipe 6 to generate a superheated high-pressure vapor-phase refrigerant from the low-pressure vapor-phase refrigerant.

また、２つの室外機３－１～３－２のうちの一方の室外機３－１の四方弁は、暖房運転が行われる室内機に利用される冷媒の量が、冷房運転が行われる室内機に利用される冷媒の量よりも多いときに、第２モードに切り換えられる。このとき、低圧ガス管６を流れる低圧気相冷媒と、室外熱交換器により生成された低圧気相冷媒は、圧縮機に供給され、室外機３－１の圧縮機により圧縮された高圧気相冷媒は、四方弁を介して室外熱交換器に供給される。室外機３－１の室外熱交換器は、蒸発器として動作する。すなわち、室外熱交換器は、液管８を流れる低圧二相冷媒と室内の空気を熱交換することにより、低圧二相冷媒の圧力が一定のまま低圧二相冷媒の乾き度を上げ、低圧二相冷媒から過熱状態の低圧気相冷媒を生成する。圧縮機は、四方弁から供給された低圧気相冷媒と低圧ガス管６を流れる低圧気相冷媒とを圧縮し、低圧気相冷媒から過熱状態の高圧気相冷媒を生成し、高圧気相冷媒を高圧ガス管７に供給する。 Further, the four-way valve of one of the two outdoor units 3-1 to 3-2, the outdoor unit 3-1, is set so that the amount of refrigerant used in the indoor unit in which the heating operation is performed is controlled by the amount of refrigerant used in the indoor unit in which the cooling operation is performed. The second mode is switched to when the amount of refrigerant available to the machine is greater. At this time, the low-pressure vapor-phase refrigerant flowing through the low-pressure gas pipe 6 and the low-pressure vapor-phase refrigerant generated by the outdoor heat exchanger are supplied to the compressor, and compressed by the compressor of the outdoor unit 3-1. Refrigerant is supplied to the outdoor heat exchanger through the four-way valve. The outdoor heat exchanger of the outdoor unit 3-1 operates as an evaporator. That is, the outdoor heat exchanger exchanges heat between the low-pressure two-phase refrigerant flowing through the liquid pipe 8 and indoor air, thereby increasing the dryness of the low-pressure two-phase refrigerant while maintaining the pressure of the low-pressure two-phase refrigerant constant. A superheated low pressure vapor phase refrigerant is generated from the phase refrigerant. The compressor compresses the low-pressure vapor-phase refrigerant supplied from the four-way valve and the low-pressure vapor-phase refrigerant flowing through the low-pressure gas pipe 6, generates a superheated high-pressure vapor-phase refrigerant from the low-pressure vapor-phase refrigerant, and produces a high-pressure vapor-phase refrigerant. is supplied to the high pressure gas pipe 7 .

複数の室外機３－１～３－２のうちの他方の室外機３－２においても、室外機３－１と同様に、動作する。 The other outdoor unit 3-2 of the plurality of outdoor units 3-1 to 3-2 also operates in the same manner as the outdoor unit 3-1.

（実施例の効果）
上述のように実施例の冷暖切換装置１の制御部５４は、複数の開閉機構５３を制御する複数の制御回路基板６１と、複数の開閉機構５３に電力を供給するための複数の電源回路基板６２と、筐体５５内に設けられて複数の制御回路基板６１及び複数の電源回路基板６２が収容される基板収容空間５６Ｃと、を有する。基板収容空間５６Ｃには、複数の制御回路基板６１が一方向Ａに沿って配列されており、複数の電源回路基板６２が、複数の制御回路基板６１に積層されて一方向Ａに沿って配列される。任意の１つの室内機５に対応する複数の開閉機構５３と、この１つの室内機５に対応する１つの制御回路基板６１及び１つの電源回路基板６２は、筐体５５内の一方向Ａにおいて互いに重なるように配置される。これにより、駆動部５２及び制御部５４を保守するときに、保守対象となる任意の１つの室内機５にそれぞれ対応する４つの開閉機構５３、制御回路基板６１、電源回路基板６２をそれぞれ見付け出し易くなる。このため、駆動部５２及び制御部５４を保守する作業性を向上することが可能になり、誤った保守作業を防ぐことができる。したがって、誤った保守作業によって複数の室内機５全体に障害が発生することを防ぐことができる。 (Effect of Example)
As described above, the control unit 54 of the cooling/heating switching device 1 of the embodiment includes a plurality of control circuit boards 61 for controlling the plurality of opening/closing mechanisms 53 and a plurality of power supply circuit boards for supplying power to the plurality of opening/closing mechanisms 53. 62 , and a board accommodation space 56</b>C that is provided in the housing 55 and accommodates the plurality of control circuit boards 61 and the plurality of power supply circuit boards 62 . A plurality of control circuit boards 61 are arranged along one direction A in the board accommodation space 56C, and a plurality of power supply circuit boards 62 are arranged along one direction A while being layered on the plurality of control circuit boards 61. be done. A plurality of opening/closing mechanisms 53 corresponding to any one indoor unit 5, and one control circuit board 61 and one power supply circuit board 62 corresponding to this one indoor unit 5 are arranged in one direction A in the housing 55. placed on top of each other. As a result, when performing maintenance on the driving unit 52 and the control unit 54, the four open/close mechanisms 53, the control circuit board 61, and the power supply circuit board 62 corresponding to any one indoor unit 5 to be maintained are found. becomes easier. Therefore, it is possible to improve the workability of maintaining the drive unit 52 and the control unit 54, and prevent erroneous maintenance work. Therefore, it is possible to prevent a failure from occurring in all of the plurality of indoor units 5 due to incorrect maintenance work.

加えて、実施例の冷暖切換装置１によれば、複数の室内機５の各冷媒配管３０の各開閉弁３１～３４を切り換えるための制御回路基板６１及び電源回路基板６２を整列させて、基板収容空間５６Ｃ内に効率良く配置することが可能になる。その結果、整列された制御回路基板６１及び電源回路基板６２を基板収容空間５６Ｃ内に密集してコンパクトに収容することが可能になるので、制御部５４を小型化し、冷暖切換装置１全体の小型化を図ることができる。また、制御回路基板６１群を制御系としてまとめて配置し、かつ、電源回路基板６２群を電源系としてまとめて配置することができるので、保守する箇所を見つけ易くなり、制御部５４の保守性を向上することができる。 In addition, according to the cooling/heating switching device 1 of the embodiment, the control circuit board 61 and the power supply circuit board 62 for switching the on-off valves 31 to 34 of the refrigerant pipes 30 of the plurality of indoor units 5 are arranged in line. It becomes possible to arrange efficiently in the accommodation space 56C. As a result, the aligned control circuit board 61 and power circuit board 62 can be densely and compactly housed in the board housing space 56C. can be improved. In addition, since the group of control circuit boards 61 can be collectively arranged as a control system and the group of power supply circuit boards 62 can be collectively arranged as a power supply system, it becomes easy to find a place to be maintained, and maintainability of the control unit 54. can be improved.

また、実施例の冷暖切換装置１において、１つの制御回路基板６１が、少なくとも２つの室内機５に対応する複数の開閉弁３１～３４を制御し、１つの電源回路基板６２が、少なくとも４つの室内機５に対応する複数の開閉弁３１～３４をそれぞれ開閉する複数の開閉機構５３に電力を供給し、一方向Ａにおいて１つの電源回路基板６２が、少なくとも２つの制御回路基板６１に跨って積層される。筐体５５内の一方向Ａにおいて、１つの電源回路基板６２及び２つの制御回路基板６１に重なる位置には、４つの室内機５に対応する１６個の開閉機構５３が配置される。これにより、任意の１つの室内機５にそれぞれ対応する４つの開閉機構５３、１つの制御回路基板６１、１つの電源回路基板６２をそれぞれ見付け出し易くすると共に、制御回路基板６１及び電源回路基板６２の個数を更に削減することが可能になる。したがって、駆動部５２及び制御部５４を保守する作業性の向上と、制御部５４の小型化とを両立することができる。 Further, in the cooling/heating switching device 1 of the embodiment, one control circuit board 61 controls a plurality of on-off valves 31 to 34 corresponding to at least two indoor units 5, and one power supply circuit board 62 controls at least four Power is supplied to a plurality of opening and closing mechanisms 53 that respectively open and close a plurality of opening and closing valves 31 to 34 corresponding to the indoor unit 5, and one power supply circuit board 62 straddles at least two control circuit boards 61 in one direction A. Laminated. 16 opening/closing mechanisms 53 corresponding to the four indoor units 5 are arranged at positions overlapping one power supply circuit board 62 and two control circuit boards 61 in one direction A inside the housing 55 . This makes it easy to find the four opening/closing mechanisms 53, one control circuit board 61, and one power circuit board 62 corresponding to any one indoor unit 5, respectively, and also allows the control circuit board 61 and the power circuit board 62 can be further reduced. Therefore, it is possible to improve workability for maintenance of the drive unit 52 and the control unit 54 and reduce the size of the control unit 54 .

また、実施例の冷暖切換装置１において、開閉機構箱８１と電装品箱８２の少なくとも一方には、開閉機構箱８１から取り外された電装品箱８２を開閉機構箱８１に係合させる取付け金具８５が設けられ、取付け金具８５によって電装品箱８２が開閉機構箱８１に係合されたとき、任意の１つの室内機５に対応する４つの開閉機構５３と、この１つの室内機５に対応する制御回路基板６１及び電源回路基板６２とがそれぞれ隣り合うように配置される。これにより、保守対象となる任意の１つの室内機５にそれぞれ対応する４つの開閉機構５３、１つの制御回路基板６１、１つの電源回路基板６２をそれぞれ見付け出し易くなると共に、１つの室内機５に対応する各開閉機構５３、制御回路基板６１及び電源回路基板６２を相互に確認し易くなる。このため、駆動部５２及び制御部５４を保守する作業性を更に向上し、誤った保守作業を更に防ぐことができる。 In addition, in the cooling/heating switching device 1 of the embodiment, at least one of the opening/closing mechanism box 81 and the electric component box 82 has a mounting bracket 85 for engaging the electric component box 82 removed from the opening/closing mechanism box 81 with the opening/closing mechanism box 81. is provided, and when the electrical component box 82 is engaged with the opening/closing mechanism box 81 by the mounting bracket 85, the four opening/closing mechanisms 53 corresponding to any one indoor unit 5 and the four opening/closing mechanisms 53 corresponding to this one indoor unit 5 The control circuit board 61 and the power circuit board 62 are arranged adjacent to each other. This makes it easier to find four opening/closing mechanisms 53, one control circuit board 61, and one power supply circuit board 62 corresponding to one indoor unit 5 to be maintained, and one indoor unit 5. The opening/closing mechanisms 53, the control circuit board 61, and the power circuit board 62 corresponding to . Therefore, it is possible to further improve the workability of maintaining the drive unit 52 and the control unit 54, and further prevent erroneous maintenance work.

また、実施例の冷暖切換装置１における取付け金具８５は、任意の１つの室内機５に対応する４つの開閉機構５３と、この１つの室内機５に対応する１つの制御回路基板６１及び１つの電源回路基板６２とが、筐体５５内の一方向Ａにおいて互いに重なるように、電装品箱８２を開閉機構箱８１に固定する。このように取付け金具８５は、電装品箱８２が開閉機構箱８１に固定するための金具と、電装品箱８２を開閉機構箱８１に吊り下げるための金具とを兼ねるので、冷暖切換装置１の構造を簡素化することができる。 Further, the mounting bracket 85 in the cooling/heating switching device 1 of the embodiment includes four opening/closing mechanisms 53 corresponding to any one indoor unit 5, one control circuit board 61 corresponding to this one indoor unit 5, and one The electrical component box 82 is fixed to the opening/closing mechanism box 81 so that the power supply circuit board 62 and the power circuit board 62 overlap each other in one direction A within the housing 55 . As described above, the mounting bracket 85 serves both as a bracket for fixing the electrical component box 82 to the opening/closing mechanism box 81 and as a bracket for suspending the electrical component box 82 from the opening/closing mechanism box 81. The structure can be simplified.

また、実施例の冷暖切換装置１の開閉機構箱８１には、任意の１つの室内機５に対応する４つの開閉機構５３毎に集めて配置されており、この４つの開閉機構５３の近傍に、この４つの開閉機構５３がこの１つの室内機５に対応することを示す第１表示部材としての識別ラベル９１Ａが設けられる。これにより、識別ラベル９１Ａを確認することで、所望の開閉機構５３を更に見付け易くなるので、駆動部５２を保守する作業性が更に高められる。 In addition, in the opening/closing mechanism box 81 of the cooling/heating switching device 1 of the embodiment, four opening/closing mechanisms 53 corresponding to any one indoor unit 5 are arranged together. , an identification label 91A as a first display member indicating that the four opening/closing mechanisms 53 correspond to the one indoor unit 5 is provided. Accordingly, by checking the identification label 91A, it becomes easier to find the desired opening/closing mechanism 53, so that the workability of maintaining the drive unit 52 is further enhanced.

また、実施例の冷暖切換装置１における第１表示部材は、任意の１つの室内機５に対応する４つの開閉機構５３の配置を示す配置ラベル９１Ｂを含む。これにより、配置ラベル９１Ｂを確認することで、所望の開閉機構５３を更に見付け易くなるので、駆動部５２を保守する作業性が更に高められる。 Also, the first display member in the cooling/heating switching device 1 of the embodiment includes an arrangement label 91B that indicates the arrangement of the four opening/closing mechanisms 53 corresponding to any one indoor unit 5 . As a result, it becomes easier to find the desired opening/closing mechanism 53 by checking the placement label 91B, so that the workability of maintaining the drive unit 52 is further enhanced.

また、実施例の冷暖切換装置１において、任意の１つの室内機５に対応する１つの制御回路基板６１と１つの電源回路基板６２は、積層されて配置されており、この１つの室内機５に対応する電源回路基板６２が有する接続端子６２ａの近傍に、接続端子６２ａに対応する室内機５を示すコネクタラベル９２が設けられる。これにより、コネクタラベル９２を確認することで、所望の電源回路基板６２を更に見付け易くなるので、駆動部５２を保守する作業性が更に高められる。 In addition, in the cooling/heating switching device 1 of the embodiment, one control circuit board 61 and one power supply circuit board 62 corresponding to one arbitrary indoor unit 5 are arranged in a stacked manner. A connector label 92 indicating the indoor unit 5 corresponding to the connection terminal 62a is provided in the vicinity of the connection terminal 62a of the power supply circuit board 62 corresponding to the connection terminal 62a. This makes it easier to find the desired power supply circuit board 62 by checking the connector label 92, so that the workability of maintaining the drive unit 52 is further enhanced.

また、実施例の冷暖切換装置１において、任意の１つの室内機５に対応する１つの制御回路基板６１と１つの電源回路基板６２は、積層されて配置されており、この１つの室内機５に対応する制御回路基板６１が有する接続端子６１ａの近傍に、接続端子６１ａに対応する室内機５を示すコネクタラベル９３が設けられる。これにより、コネクタラベル９３を確認することで、所望の制御回路基板６１を更に見付け易くなるので、駆動部５２を保守する作業性が更に高められる。 In addition, in the cooling/heating switching device 1 of the embodiment, one control circuit board 61 and one power supply circuit board 62 corresponding to one arbitrary indoor unit 5 are arranged in a stacked manner. A connector label 93 indicating the indoor unit 5 corresponding to the connection terminal 61a is provided in the vicinity of the connection terminal 61a of the control circuit board 61 corresponding to the connection terminal 61a. This makes it easier to find the desired control circuit board 61 by checking the connector label 93, so that the workability of maintaining the drive unit 52 is further enhanced.

１ 冷暖切換装置
３ 室外機
５ 室内機
３０ 冷媒配管
３１～３４ 開閉弁
５１ 配管部
５２ 駆動部
５３ 開閉機構
５４ 制御部
５５ 筐体
５６Ｃ 基板収容空間
６１ 制御回路基板
６１ａ 接続端子
６２ 電源回路基板
６２ａ 接続端子
８１ 開閉機構箱（第１筐体）
８２ 電装品箱（第２筐体）
８５ 取付け金具（係合部材）
８６ 吊り下げ片（係合部材）
９１Ａ 識別ラベル（第１表示部材
９２Ｂ 配置ラベル（第１表示部材）
９２ コネクタラベル（第２表示部材）
９３ コネクタラベル（第３表示部材）
Ａ 一方向 1 Cooling/heating switching device 3 Outdoor unit 5 Indoor unit 30 Refrigerant piping 31 to 34 On-off valve 51 Piping unit 52 Driving unit 53 Opening/closing mechanism 54 Control unit 55 Case 56C Board accommodation space 61 Control circuit board 61a Connection terminal 62 Power supply circuit board 62a Connection Terminal 81 Switching mechanism box (first housing)
82 Electrical component box (second housing)
85 mounting bracket (engagement member)
86 hanging piece (engagement member)
91A identification label (first display member) 92B placement label (first display member)
92 connector label (second display member)
93 connector label (third display member)
A one way

Claims (7)

複数の室内機及び少なくとも１つの室外機に接続された複数の冷媒配管と、前記複数の冷媒配管に設けられた複数の開閉弁と、を有する配管部と、前記複数の開閉弁をそれぞれ開閉する複数の開閉機構を有する駆動部と、前記複数の開閉機構を制御する制御部と、前記配管部、前記駆動部及び前記制御部が収容される筐体と、を備え、
前記制御部は、前記複数の開閉機構を制御する複数の制御回路基板と、前記複数の開閉機構に電力を供給するための複数の電源回路基板と、前記筐体内に設けられて前記複数の制御回路基板及び前記複数の電源回路基板が収容される基板収容空間と、を有し、
前記基板収容空間には、前記複数の制御回路基板が第１方向に沿って配列され、前記複数の電源回路基板が、前記複数の制御回路基板に積層されて前記第１方向に沿って配列され、
１つの前記室内機に対応する複数の前記開閉機構と、当該１つの前記室内機に対応する１つの前記制御回路基板及び１つの前記電源回路基板は、前記筐体内の前記第１方向と直交する第２方向に互いに重なるように配置され、
１つの前記制御回路基板は、２つの前記室内機に対応する複数の開閉弁を制御し、
１つの前記電源回路基板は、４つの前記室内機に対応する複数の開閉弁をそれぞれ開閉する複数の前記開閉機構に電力を供給し、
１つの前記電源回路基板は、前記第１方向に対して２つの前記制御回路基板に跨るように当該２つの制御回路基板の前記第２方向に積層され、
前記第２方向から見たときに前記第１方向の位置が１つの前記電源回路基板及び２つの前記制御回路基板と隣り合うように、４つの前記室内機に対応する複数の前記開閉機構が前記筐体内に配置される、冷暖切換装置。 a piping unit having a plurality of refrigerant pipes connected to a plurality of indoor units and at least one outdoor unit; and a plurality of on-off valves provided in the plurality of refrigerant pipes; and opening and closing the plurality of on-off valves, respectively. A driving unit having a plurality of opening/closing mechanisms, a control unit that controls the plurality of opening/closing mechanisms, and a housing that houses the piping unit, the driving unit, and the control unit,
The control unit includes: a plurality of control circuit boards for controlling the plurality of opening/closing mechanisms; a plurality of power supply circuit boards for supplying power to the plurality of opening/closing mechanisms; a board accommodation space in which the circuit board and the plurality of power supply circuit boards are accommodated;
In the board accommodation space, the plurality of control circuit boards are arranged along the first direction, and the plurality of power supply circuit boards are stacked on the plurality of control circuit boards and arranged along the first direction. ,
A plurality of opening/closing mechanisms corresponding to one indoor unit, and one control circuit board and one power supply circuit board corresponding to the one indoor unit are orthogonal to the first direction in the housing. arranged to overlap each other in the second direction ,
One control circuit board controls a plurality of on-off valves corresponding to the two indoor units,
one power supply circuit board supplies power to a plurality of opening and closing mechanisms for opening and closing a plurality of opening and closing valves corresponding to the four indoor units;
one power supply circuit board is laminated in the second direction of the two control circuit boards so as to straddle the two control circuit boards in the first direction;
A plurality of the opening/closing mechanisms corresponding to the four indoor units are arranged so that when viewed from the second direction, the positions in the first direction are adjacent to one of the power supply circuit boards and two of the control circuit boards. A cooling /heating switching device arranged in the housing . 前記筐体は、前記駆動部が収容される第１筐体と、前記制御部が収容される第２筐体と、を有し、
前記第１筐体と前記第２筐体の少なくとも一方には、前記第１筐体から取り外された前記第２筐体を前記第１筐体に係合させる係合部材が設けられ、
前記係合部材によって前記第２筐体が前記第１筐体に係合されたとき、１つの前記室内機に対応する複数の前記開閉機構と、当該１つの前記室内機に対応する１つの前記制御回路基板及び１つの前記電源回路基板とがそれぞれ隣り合うように配置される、
請求項１に記載の冷暖切換装置。 The housing has a first housing in which the drive unit is housed and a second housing in which the control unit is housed,
At least one of the first housing and the second housing is provided with an engaging member for engaging the second housing removed from the first housing with the first housing,
When the second housing is engaged with the first housing by the engaging member, a plurality of opening/closing mechanisms corresponding to one indoor unit and one opening/closing mechanism corresponding to the one indoor unit A control circuit board and one of the power supply circuit boards are arranged adjacent to each other,
The cooling/heating switching device according to claim 1 . 前記第２方向から見たときに、前記係合部材は、１つの前記室内機に対応する複数の前記開閉機構の前記第１方向の位置が、当該１つの前記室内機に対応する１つの前記制御回路基板及び１つの前記電源回路基板と隣り合うように、前記第２筐体を前記第１筐体に固定する、
請求項２に記載の冷暖切換装置。 When viewed from the second direction, the engaging member is such that the positions of the plurality of opening/closing mechanisms corresponding to one indoor unit in the first direction correspond to one of the indoor units. fixing the second housing to the first housing so as to be adjacent to a control circuit board and one of the power supply circuit boards;
The cooling/heating switching device according to claim 2 . 前記第１筐体には、前記複数の開閉機構が１つの前記室内機に対応する４つの開閉機構毎に集めて配置され、当該４つの開閉機構の近傍に、当該４つの開閉機構が当該１つの室内機に対応することを示す第１表示部材が設けられる、
請求項２または３に記載の冷暖切換装置。 In the first housing, the plurality of opening/closing mechanisms are arranged for each four opening/closing mechanisms corresponding to one indoor unit, and the four opening/closing mechanisms are arranged in the vicinity of the four opening/closing mechanisms. A first display member is provided to indicate that it corresponds to one indoor unit,
The cooling/heating switching device according to claim 2 or 3 . 前記第１表示部材は、１つの前記室内機に対応する４つの開閉機構の配置を示す表示部材を含む、
請求項４に記載の冷暖切換装置。 The first display member includes a display member indicating the arrangement of four opening/closing mechanisms corresponding to one indoor unit,
The cooling/heating switching device according to claim 4 . １つの前記室内機に対応する１つの前記制御回路基板と１つの前記電源回路基板は、積層されて配置され、
当該電源回路基板は、前記複数の室内機に対応する複数の接続端子を有し、前記接続端子の近傍に、当該接続端子に対応する室内機を示す第２表示部材が設けられる、
請求項２ないし５のいずれか１項に記載の冷暖切換装置。 one of the control circuit boards and one of the power supply circuit boards corresponding to one of the indoor units are stacked and arranged;
The power circuit board has a plurality of connection terminals corresponding to the plurality of indoor units, and a second display member is provided near the connection terminals to indicate the indoor units corresponding to the connection terminals.
The cooling/heating switching device according to any one of claims 2 to 5 . １つの前記室内機に対応する１つの前記制御回路基板と１つの前記電源回路基板は、積層されて配置され、
当該制御回路基板は、前記複数の室内機に対応する複数の接続端子を有し、前記接続端子の近傍に、当該接続端子に対応する室内機を示す第３表示部材が設けられる、
請求項２ないし６のいずれか１項に記載の冷暖切換装置。 one of the control circuit boards and one of the power supply circuit boards corresponding to one of the indoor units are stacked and arranged;
The control circuit board has a plurality of connection terminals corresponding to the plurality of indoor units, and a third display member indicating the indoor unit corresponding to the connection terminal is provided near the connection terminals.
The cooling/heating switching device according to any one of claims 2 to 6 .
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