JPH0311665Y2 - - Google Patents
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- Publication number
- JPH0311665Y2 JPH0311665Y2 JP1984148425U JP14842584U JPH0311665Y2 JP H0311665 Y2 JPH0311665 Y2 JP H0311665Y2 JP 1984148425 U JP1984148425 U JP 1984148425U JP 14842584 U JP14842584 U JP 14842584U JP H0311665 Y2 JPH0311665 Y2 JP H0311665Y2
- Authority
- JP
- Japan
- Prior art keywords
- indoor unit
- expansion valve
- during
- indoor
- refrigerant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、１台の室外機に対し複数台の室内機
が接続されたヒートポンプ式空気調和機に関し、
特に、暖房サイクル時に運転停止された室内機で
の液冷媒の滞留を防止する対策に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a heat pump air conditioner in which multiple indoor units are connected to one outdoor unit.
In particular, the present invention relates to measures to prevent liquid refrigerant from stagnation in an indoor unit whose operation is stopped during a heating cycle.
従来より、この種の複数台の室内機を備えたヒ
ートポンプ式空気調和機においては、、その暖房
運転時、あるいは室内機の運転が停止されると、
その停止した室内機の液管内に室内熱交換器で自
然凝縮した液冷媒が滞留して、室外機での冷媒圧
縮容量が不足し、その結果、暖房能力が低下する
という問題がある。
Conventionally, in heat pump air conditioners equipped with multiple indoor units of this type, during heating operation or when the operation of the indoor units is stopped,
There is a problem in that the liquid refrigerant naturally condensed in the indoor heat exchanger remains in the liquid pipes of the stopped indoor unit, resulting in a shortage of refrigerant compression capacity in the outdoor unit, and as a result, heating capacity is reduced.
そのため、このような問題を解決すべく、本出
願人は、前に、第２図に示すように、各室内機ａ
の液管a1に、室内機１０ａの運転を制御する電磁
弁a2をバイパスしてキヤピラリチユーブa3を接続
し、暖房サイクル時に電磁弁a2の閉弁により室内
機ａが停止した状態では、該室内機ａの液管a1内
に室内熱交換器a4での自然凝縮により滞留した液
冷媒を該キヤピラリチユーブa3を通して室外機ｂ
側に排出するようにした空気調和機を提案してい
る（実開昭59−25067号公報参照）。尚、a5は冷房
サイクル時に液冷媒を所定圧力に減圧膨張させる
膨張弁、a6〜a8は冷媒の流れを所定方向に規制す
る逆止弁、a9はフイルタ、a10はモータa11の駆動
によつて室内熱交換器a4に送風する室内フアンで
ある。 Therefore, in order to solve such problems, the applicant previously proposed that each indoor unit a.
The capillary tube A3 is connected to the liquid pipe A1 of the indoor unit 10a by bypassing the solenoid valve A2 that controls the operation of the indoor unit 10a , and the indoor unit A is stopped by closing the solenoid valve A2 during the heating cycle. Now, the liquid refrigerant accumulated in the liquid pipe A1 of the indoor unit A by natural condensation in the indoor heat exchanger A4 is passed through the capillary tube A3 to the outdoor unit B.
They have proposed an air conditioner that discharges air to the side (see Utility Model Application Publication No. 59-25067). In addition, a5 is an expansion valve that decompresses and expands the liquid refrigerant to a predetermined pressure during the cooling cycle, a6 to a8 are check valves that regulate the flow of refrigerant in a predetermined direction, a9 is a filter, and a10 is a motor a11 This is an indoor fan that blows air to the indoor heat exchanger A4 by driving.
（考案が解決しようとする問題点）
ところが、このものでは、各室内機ａにキヤピ
ラリチユーブa3を設けるために、構造が複雑とな
り、しかもキヤピラリチユーブa3の詰り等の発生
する虞れもあり、装置構造の簡単化、信頼性の向
上を図る面で改良の余地があつた。(Problems to be solved by the invention) However, with this device, each indoor unit a is provided with a capillary tube A3 , which makes the structure complicated, and there is a risk of clogging of the capillary tube A3 . Therefore, there was room for improvement in terms of simplifying the device structure and improving reliability.
本考案は斯かる点に鑑みてなされたもので、そ
の目的とするところは、上記の如き複数台の室内
機を備えたヒートポンプ式空気調和機において、
各室内機の液管に配設されて、冷房サイクル時に
液冷媒を膨張させるために使用される膨張弁の開
度を調整するようにすることにより、暖房サイク
ル時に停止した室内機における液冷媒を膨張弁を
通して室外機側に排出して、従来の如きキヤピラ
リチユーブを不要とし、よつて室内機構造の簡単
化及び信頼性の向上を図ることにある。 The present invention was developed in view of the above, and its purpose is to provide a heat pump type air conditioner equipped with multiple indoor units as described above.
By adjusting the opening degree of the expansion valve that is installed in the liquid pipe of each indoor unit and used to expand the liquid refrigerant during the cooling cycle, the liquid refrigerant in the indoor unit that has stopped during the heating cycle can be adjusted. The purpose is to discharge the air to the outdoor unit through an expansion valve, thereby eliminating the need for a conventional capillary tube, thereby simplifying the structure of the indoor unit and improving its reliability.
（問題点を解決するための手段）
上記目的を達成するため、本考案の解決手段
は、第１図に示すように、１台の室外機１に対し
複数の室内機１０，１０，…が接続されたヒート
ポンプ式空気調和機において、上記室外機１には
暖房サイクル時に作用する膨張弁７を配設する。(Means for solving the problem) In order to achieve the above object, the solving means of the present invention is such that a plurality of indoor units 10, 10, . . . In the connected heat pump air conditioner, the outdoor unit 1 is provided with an expansion valve 7 that operates during the heating cycle.
一方、上記各室内機１０の液管１５には、冷房
サイクル時に液冷媒の膨張のために作用する開度
調整可能な膨張弁１８を配設する。そして、この
膨張弁１８を、制御装置１９により、膨張弁１８
に対応する室内機１０が冷房サイクルで運転され
ているときには所定開度に開き、暖房サイクルで
運転されているときには全開にする一方、該室内
機１０が冷房サイクルで停止したときには全閉
し、暖房サイクルで停止したときには微小開度に
開くように制御する構成としている。 On the other hand, the liquid pipe 15 of each indoor unit 10 is provided with an expansion valve 18 whose opening degree can be adjusted to expand the liquid refrigerant during the cooling cycle. Then, the expansion valve 18 is controlled by the control device 19.
When the indoor unit 10 corresponding to the indoor unit 10 is operating in the cooling cycle, it is opened to a predetermined opening degree, and when it is operating in the heating cycle, it is fully opened, and when the indoor unit 10 is stopped in the cooling cycle, it is fully closed and the heating When the cycle stops, the opening is controlled to a very small degree.
（作用）
上記構成により、本考案では、空気調和機の暖
房サイクル時に、ある室内機１０の運転が停止さ
れたときには、その室内機１０の膨張弁１８は微
小開度だけ開き、室内機１８の液管１５内の凝縮
液冷媒はその開いた膨張弁１８を通つて室外機１
側に排出されて、その液管１５内への滞留が阻止
される。そのため、キヤピラリチユーブが不要と
なる。(Function) With the above configuration, in the present invention, when the operation of a certain indoor unit 10 is stopped during the heating cycle of the air conditioner, the expansion valve 18 of the indoor unit 10 opens by a minute opening, The condensed refrigerant in the liquid pipe 15 passes through the opened expansion valve 18 to the outdoor unit 1.
The liquid is discharged to the side, and its accumulation in the liquid pipe 15 is prevented. Therefore, a capillary tube is not required.
また、暖房サイクル時、停止している室内機１
０の冷媒圧力を高圧に保つことができ、その運転
の再開時には、暖まつている室内熱交換器１１に
より、暖房運転をスムーズに再開することができ
るとともに、その切換時、大きな冷媒流通音が発
生することはなく、騒音による違和感をなくすこ
とができる。 Also, during the heating cycle, indoor unit 1 that is stopped
The zero refrigerant pressure can be maintained at a high pressure, and when the operation is restarted, the indoor heat exchanger 11 is already warm, allowing the heating operation to be resumed smoothly. This does not occur, and the discomfort caused by the noise can be eliminated.
（実施例）
以下、本考案の実施例を図面に基づいて詳細に
説明する。(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.
第１図は本考案の実施例に係るヒートポンプ式
空気調和機の冷媒配管系統を示し、１は１台の室
外機であつて、該室外機１にはガス連絡配管１６
及び液連絡配管１７を介して２台の室内機１０，
１０が互いに並列に接続されている。 FIG. 1 shows a refrigerant piping system of a heat pump type air conditioner according to an embodiment of the present invention, in which 1 is one outdoor unit, and the outdoor unit 1 has gas communication piping 16.
and two indoor units 10 via liquid communication piping 17,
10 are connected in parallel with each other.
上記室外機１は、低圧のガス冷媒を高圧のガス
冷媒に圧縮する圧縮機２と、冷房サイクル時及び
暖房サイクル時の冷媒の流通方向を互いに逆向き
に切り換える四路切換弁３と、ガス冷媒の凝縮又
は液冷媒の蒸発を行う室外熱交換器４と、モータ
５の駆動によつて上記室外熱交換器４に送風する
室外フアン６と、暖房サイクル時に各室内機１０
から供給された液冷媒を室外熱交換器４で蒸発可
能な圧力まで減圧膨張させる膨張弁７とを備え、
上記ガス連絡配管１６、四路切換弁３、圧縮機２
及び室外熱交換器４はガス管８によつて接続さ
れ、室外熱交換器４、膨張弁７及び液連絡配管１
７は液管９によつて接続されている。 The outdoor unit 1 includes a compressor 2 that compresses a low-pressure gas refrigerant into a high-pressure gas refrigerant, a four-way switching valve 3 that switches the flow direction of the refrigerant in opposite directions during the cooling cycle and the heating cycle, and the gas refrigerant. an outdoor heat exchanger 4 that condenses liquid refrigerant or evaporates liquid refrigerant, an outdoor fan 6 that blows air to the outdoor heat exchanger 4 by driving a motor 5, and each indoor unit 10 during the heating cycle.
an expansion valve 7 that depressurizes and expands the liquid refrigerant supplied from the outdoor heat exchanger 4 to a pressure that can be evaporated;
The above gas communication pipe 16, four-way switching valve 3, compressor 2
and the outdoor heat exchanger 4 are connected by a gas pipe 8, and the outdoor heat exchanger 4, the expansion valve 7 and the liquid communication pipe 1
7 are connected by a liquid pipe 9.
一方、上記各室内機１０は、液冷媒の蒸発又は
ガス冷媒の凝縮を行う室内熱交換器１１と、モー
タ１２の駆動によつて室内熱交換器１１に送風す
る室内フアン１３，１３とを備え、上記室内熱交
換器１１とガス連絡配管１６とはガス管１４によ
つて接続され、室内熱交換器１１と液連通配管１
７とは液管１５によつて接続されている。そし
て、四路切換弁３の切換作動により、冷房サイク
ル時には冷媒を図で実線にて示す方向に流して、
圧縮機２から吐出された高圧のガス冷媒を室外熱
交換器４で液冷媒に凝縮し、その液冷媒を各室内
機１０の室内熱交換器１１でガス冷媒に蒸発させ
たのち圧縮機２に戻す一方、暖房サイクル時には
冷媒を図で破線にて示す方向に流して、圧縮機２
からのガス冷媒を各室内機１０の室内熱交換器１
１で液冷媒に凝縮し、その液冷媒を室外機１の室
外熱交換器４でガス冷媒に蒸発させたのち圧縮機
２に戻すようになされている。尚、２０はフイル
タ、２１はアキユムレータ、２２は受液器であ
る。 On the other hand, each indoor unit 10 includes an indoor heat exchanger 11 that evaporates liquid refrigerant or condenses gas refrigerant, and indoor fans 13, 13 that blow air to the indoor heat exchanger 11 by driving a motor 12. , the indoor heat exchanger 11 and the gas communication pipe 16 are connected by a gas pipe 14, and the indoor heat exchanger 11 and the liquid communication pipe 1 are connected by a gas pipe 14.
7 through a liquid pipe 15. Then, by switching the four-way switching valve 3, during the cooling cycle, the refrigerant flows in the direction shown by the solid line in the figure.
The high-pressure gas refrigerant discharged from the compressor 2 is condensed into liquid refrigerant in the outdoor heat exchanger 4, and the liquid refrigerant is evaporated into gas refrigerant in the indoor heat exchanger 11 of each indoor unit 10, and then transferred to the compressor 2. On the other hand, during the heating cycle, the refrigerant is flowed in the direction shown by the broken line in the figure, and the compressor 2
The gas refrigerant from the indoor heat exchanger 1 of each indoor unit 10
1, the liquid refrigerant is evaporated into gas refrigerant in the outdoor heat exchanger 4 of the outdoor unit 1, and then returned to the compressor 2. In addition, 20 is a filter, 21 is an accumulator, and 22 is a liquid receiver.
また、上記各室内機１０の液管１５には、冷房
サイクル時に室外熱交換器４から供給された液冷
媒を室内熱交換器１１で蒸発可能な圧力まで減圧
膨張させるように作用する開度調整可能な電気膨
張弁１８が配設されている。 Further, the liquid pipes 15 of each of the indoor units 10 have an opening adjustment that acts to depressurize and expand the liquid refrigerant supplied from the outdoor heat exchanger 4 during the cooling cycle to a pressure at which it can be evaporated in the indoor heat exchanger 11. A possible electric expansion valve 18 is provided.
さらに、上記各電気膨張弁１８はその開度を制
御回路１９によつて調整されるように設けられて
おり、制御回路１９により膨張弁１８を、該膨張
弁１８に対応する室内機１０の運転時の冷房サイ
クル時にあつては所定開度に開き、暖房サイクル
時にあつては全開する一方、室内機１０の運転停
止時の冷房サイクル時にあつては全閉し、暖房サ
イクル時にあつては微小開度に開くように制御す
るように構成されている。 Further, each electric expansion valve 18 is provided so that its opening degree is adjusted by a control circuit 19, and the control circuit 19 controls the expansion valve 18 to operate the indoor unit 10 corresponding to the expansion valve 18. During the cooling cycle, it opens to a predetermined opening degree, and during the heating cycle, it opens fully, while it fully closes during the cooling cycle when the indoor unit 10 stops operating, and slightly opens during the heating cycle. It is configured to be controlled to open at the same time.
したがつて、上記実施例においては、冷房サイ
クル時、両室内機１０，１０が共に運転されてい
るときには、各室内機１０の膨張弁１８は所定開
度に開かれ、この膨張弁１８の開度調整により室
外機１の室外熱交換器４から供給された液冷媒は
室内熱交換器１１で蒸発可能な圧力まで減圧膨張
され、よつて膨張弁１８に冷房サイクル時の通常
の機能を行わせることができる。 Therefore, in the above embodiment, when both indoor units 10, 10 are operated during the cooling cycle, the expansion valve 18 of each indoor unit 10 is opened to a predetermined opening degree; By temperature adjustment, the liquid refrigerant supplied from the outdoor heat exchanger 4 of the outdoor unit 1 is depressurized and expanded to a pressure that can be evaporated in the indoor heat exchanger 11, thereby causing the expansion valve 18 to perform its normal function during the cooling cycle. be able to.
また、この冷房サイクル時に一方の室内機１０
の運転が停止したときには、それに伴い、その停
止室内機１０の膨張弁１８が全閉状態になり、こ
の膨張弁１８の全閉状態により室外熱交換器４か
ら停止室内機１０へ至る冷媒の流れが阻止される
とともに、液管１５内の液冷媒も、低圧に維持さ
れる室内熱交換器１１において漸次蒸発してゆ
き、滞留の問題は生じることがなく、よつて運転
状態にある他方の室内機１０に対する冷媒量を大
に保つてその能力を高めることができる。 Also, during this cooling cycle, one of the indoor units 10
When the operation of the indoor unit 10 stops, the expansion valve 18 of the stopped indoor unit 10 becomes fully closed, and the fully closed state of the expansion valve 18 prevents the flow of refrigerant from the outdoor heat exchanger 4 to the stopped indoor unit 10. At the same time, the liquid refrigerant in the liquid pipe 15 gradually evaporates in the indoor heat exchanger 11, which is maintained at a low pressure, and there is no problem of stagnation. The amount of refrigerant for the machine 10 can be kept large to increase its capacity.
一方、暖房サイクル時、両室内機１０，１０が
共に運転状態にあるときには、各室内機１０の膨
張弁１８は全開され、この膨張弁１８の全開状態
により室内熱交換器１１で凝縮した液冷媒はスム
ーズに室外機１に流れる。 On the other hand, during the heating cycle, when both indoor units 10, 10 are in operation, the expansion valves 18 of each indoor unit 10 are fully opened, and the liquid refrigerant condensed in the indoor heat exchanger 11 due to the fully open state of the expansion valves 18. flows smoothly to the outdoor unit 1.
また、この暖房サイクル時に一方の室内機１０
の運転が停止したときには、それに伴つて停止室
内機１０の膨張弁１８の開度が微小開度に保たれ
る。そのため、室内機１０の運転停止によりその
室内熱交換器１１でガス冷媒が自然凝縮しても、
その液冷媒は液管１５内に滞留することなく、上
記微小開度に開いた膨張弁１８を通つてスムーズ
に室外機１側に排出される。その結果、運転状態
にある他方の室内機１０に対する冷媒量を大に確
保してその能力を高めることができる。 Also, during this heating cycle, one indoor unit 10
When the operation of the indoor unit 10 is stopped, the opening degree of the expansion valve 18 of the stopped indoor unit 10 is maintained at a very small opening degree. Therefore, even if the gas refrigerant naturally condenses in the indoor heat exchanger 11 due to the shutdown of the indoor unit 10,
The liquid refrigerant does not remain in the liquid pipe 15 and is smoothly discharged to the outdoor unit 1 side through the expansion valve 18 which is opened to the minute opening. As a result, a large amount of refrigerant can be secured for the other indoor unit 10 that is in operation, and its capacity can be increased.
そして、この場合、上記暖房サイクル時の停止
室内機１０からの液冷媒の排出を従来の如きキヤ
ピラリチユーブを用いずに行うことができ、しか
も室内機１０の運転状態に合せた膨張弁１８の開
度調整により電磁弁や逆止弁等を省略することが
できるため、室内機１０の内部構造を簡単にで
き、かつその信頼性を向上させることができる。 In this case, the liquid refrigerant can be discharged from the stopped indoor unit 10 during the heating cycle without using a conventional capillary tube, and the expansion valve 18 can be adjusted according to the operating state of the indoor unit 10. Since a solenoid valve, a check valve, etc. can be omitted by adjusting the opening degree, the internal structure of the indoor unit 10 can be simplified and its reliability can be improved.
また、各室内機１０の液管１５に膨張弁１８が
設けられ、この膨張弁１８は、暖房サイクル時に
室内機１０が停止しているときには微小開度のみ
開くので、その室内機１０での冷媒圧力を高圧に
保つことができる。従つて、この停止室内機１０
の運転の再開時には、その熱交換器１１が暖まつ
ているので、熱交換器１１自身を暖めることは不
要であり、室内への放熱を迅速に開始して、暖房
運転をスムーズに再開することができる。 Further, an expansion valve 18 is provided in the liquid pipe 15 of each indoor unit 10, and since this expansion valve 18 opens only to a small degree when the indoor unit 10 is stopped during the heating cycle, the refrigerant in the indoor unit 10 is Can maintain high pressure. Therefore, this stopped indoor unit 10
When the operation resumes, the heat exchanger 11 is warmed up, so there is no need to heat the heat exchanger 11 itself, and heat radiation into the room can be started quickly to smoothly restart the heating operation. I can do it.
しかも、その際、停止室内機１０内が高圧であ
るので、その運転の再開時に冷媒が急激に流れる
ことはなく、冷媒流通音による騒音の発生をなく
すことができる。 Moreover, since the inside of the stopped indoor unit 10 is at high pressure at that time, the refrigerant does not flow suddenly when the operation is restarted, and the generation of noise due to refrigerant flow noise can be eliminated.
尚、上記実施例では、各室内機１０の液管１５
に配設する膨張弁として電気膨張弁１８を用いた
が、その他、感熱式のものを用いてもよく、この
場合には、前記制御装置１９として、感温筒をヒ
ータ加熱制御するもの等を採用すればよい。 In addition, in the above embodiment, the liquid pipe 15 of each indoor unit 10
Although an electric expansion valve 18 is used as the expansion valve disposed in the cylinder, a heat-sensitive type may also be used. Just adopt it.
また、本考案は、上記実施例の如き２台の室内
機１０，１０を備えた空気調和機に限らず、３台
以上の室内機を備えたヒートポンプ式空気調和機
に対しても適用できるのは言うまでもない。 Furthermore, the present invention can be applied not only to an air conditioner equipped with two indoor units 10, 10 as in the above embodiment, but also to a heat pump type air conditioner equipped with three or more indoor units. Needless to say.
（考案の効果）
以上の如く、本考案によれば、１台の室外機に
複数台の室内機が接続されたヒートポンプ式空気
調和機において、各室内機の液管に開度調整可能
な冷房サイクル時の膨張弁を設け、暖房サイクル
時に室内機が停止したときにはその停止した室内
機の膨張弁を微小開度だけ開いて、室内機の液管
内の液冷媒を室外側に排出するようにしたことに
より、暖房サイクル時の停止室内機からの液冷媒
の排出を従来の如きキヤピラリチユーブを用いず
に行うことができ、よつてヒートポンプ式空気調
和機の室内機の構造簡単化、信頼性の向上を図る
ことができる。また、暖房サイクル時における停
止室内機内を高圧に保つことができ、その停止室
内機の運転再開時、室内への放熱を素早く行つ
て、暖房運転をスムーズに再開できるとともに、
急激な冷媒の流通による騒音の発生をなくすこと
ができる。(Effects of the invention) As described above, according to the invention, in a heat pump air conditioner in which multiple indoor units are connected to one outdoor unit, the opening degree of the liquid pipe of each indoor unit can be adjusted. An expansion valve is provided during the cycle, and when the indoor unit stops during the heating cycle, the expansion valve of the stopped indoor unit is opened by a small opening to discharge the liquid refrigerant in the indoor unit's liquid pipes to the outside. As a result, the liquid refrigerant can be discharged from the stopped indoor unit during the heating cycle without using a conventional capillary tube, thereby simplifying the structure and improving the reliability of the indoor unit of the heat pump type air conditioner. You can improve your performance. In addition, it is possible to maintain high pressure inside the stopped indoor unit during the heating cycle, and when the stopped indoor unit resumes operation, heat is quickly radiated into the room, and heating operation can be resumed smoothly.
It is possible to eliminate noise caused by rapid flow of refrigerant.
第１図は本考案の実施例を示す全体構成図であ
る。第２図は従来例の要部を示す冷媒配管系統図
である。
１……室外機、２……圧縮機、３……四路切換
弁、４……室外熱交換器、７……膨張弁、１０…
…室内機、１１……室内熱交換器、１５……液
管、１６……ガス連絡配管、１７……液連絡配
管、１８……膨張弁、１９……制御回路。
FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. FIG. 2 is a refrigerant piping system diagram showing the main parts of a conventional example. 1... Outdoor unit, 2... Compressor, 3... Four-way switching valve, 4... Outdoor heat exchanger, 7... Expansion valve, 10...
... Indoor unit, 11 ... Indoor heat exchanger, 15 ... Liquid pipe, 16 ... Gas communication pipe, 17 ... Liquid communication pipe, 18 ... Expansion valve, 19 ... Control circuit.
Claims (1)
…が接続されたヒートポンプ式空気調和機におい
て、 上記室外機１には暖房サイクル時に作用する膨
張弁７が配設され、 上記各室内機１０の液管１５に配設され、冷房
サイクル時に作用する開度調整可能な膨張弁１８
と、該膨張弁１８を、対応する室内機１０の運転
時の冷房サイクル時にあつては、所定開度に開
き、暖房サイクル時にあつては全開する一方、対
応する室内機１０の停止時の冷房サイクル時にあ
つては全閉し、暖房サイクル時にあつては微小開
度に開くように制御する制御装置１９とを備えた
ことを特徴とするヒートポンプ式空気調和機。[Scope of claim for utility model registration] One outdoor unit 1 and multiple indoor units 10, 10,
In a heat pump type air conditioner connected to..., an expansion valve 7 is disposed in the outdoor unit 1 and operates during the heating cycle, and an expansion valve 7 is disposed in the liquid pipe 15 of each indoor unit 10 and operates during the cooling cycle. Expansion valve 18 with adjustable opening
The expansion valve 18 is opened to a predetermined opening degree during the cooling cycle when the corresponding indoor unit 10 is operating, and is fully opened during the heating cycle, while the expansion valve 18 is opened to a predetermined opening degree during the cooling cycle when the corresponding indoor unit 10 is operating. A heat pump type air conditioner characterized by comprising a control device 19 that controls the air conditioner to be fully closed during a cycle and to be opened to a small degree during a heating cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984148425U JPH0311665Y2 (en) | 1984-09-29 | 1984-09-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984148425U JPH0311665Y2 (en) | 1984-09-29 | 1984-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6163666U JPS6163666U (en) | 1986-04-30 |
| JPH0311665Y2 true JPH0311665Y2 (en) | 1991-03-20 |
Family
ID=30706638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984148425U Expired JPH0311665Y2 (en) | 1984-09-29 | 1984-09-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0311665Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55143362A (en) * | 1979-04-25 | 1980-11-08 | Matsushita Electric Industrial Co Ltd | Multiichamber air conditioner |
-
1984
- 1984-09-29 JP JP1984148425U patent/JPH0311665Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6163666U (en) | 1986-04-30 |
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