JP2005233441A - Air conditioner - Google Patents

Air conditioner Download PDF

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JP2005233441A
JP2005233441A JP2004039352A JP2004039352A JP2005233441A JP 2005233441 A JP2005233441 A JP 2005233441A JP 2004039352 A JP2004039352 A JP 2004039352A JP 2004039352 A JP2004039352 A JP 2004039352A JP 2005233441 A JP2005233441 A JP 2005233441A
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compressor
valve
heat exchanger
stopped
refrigerant
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Shunji Itakura
俊二 板倉
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Fujitsu General Ltd
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Fujitsu General Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/026—Compressor control by controlling unloaders
    • F25B2600/0261—Compressor control by controlling unloaders external to the compressor

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of preventing start noise from occurring in re-starting a compressor by preventing the lap of a fixed scroll to an orbiting scroll installed in the compressor from being displaced when an operation is stopped. <P>SOLUTION: The delivery side of the compressor 1 is connected to the suction side thereof, and a bypass route 6 having an opening/closing valve 7 is formed. When cooling or heating operation is stopped, the opening/closing valve 7 installed in the bypass route 6 is opened immediately before the compressor 1 is stopped to recirculate a high-pressure refrigerant on the delivery side of the compressor 1 to a low-pressure refrigerant on the suction side of the compressor 1. Thus, the displacement of the fixed scroll to the orbiting scroll in the compressor 1 can be prevented to prevent start noise from occurring when the compressor 1 is re-started and reduce a re-start time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、空気調和機に関わり、より詳細には圧縮機を再起動させる際の騒音を防止する構成に関する。   The present invention relates to an air conditioner, and more particularly to a configuration for preventing noise when a compressor is restarted.

圧縮機の吸込側と吐出側とを結ぶバイパス路を設けた従来の空気調和機は、例えば図４で示すように、圧縮機２０と、室外熱交換器２１と、室外熱交換器用膨張弁２４と、受液器２９と、夫々室内熱交換器用膨張弁２５を備え並列に接続された室内熱交換器２２と、アキュームレータ２３とを順次接続するとともに、同アキュームレータ２３の吸込側と前記圧縮機２０の吐出側とをバイパス弁２７を備えたバイパス回路２６により接続して冷媒回路を構成している。   As shown in FIG. 4, for example, a conventional air conditioner provided with a bypass path connecting the suction side and the discharge side of the compressor has a compressor 20, an outdoor heat exchanger 21, and an outdoor heat exchanger expansion valve 24. A liquid receiver 29, an indoor heat exchanger 22 provided with an expansion valve 25 for an indoor heat exchanger, and an accumulator 23, which are connected in parallel, and a suction side of the accumulator 23 and the compressor 20 Is connected to the discharge side by a bypass circuit 26 having a bypass valve 27 to constitute a refrigerant circuit.

上記した冷媒回路が冷房運転を行う際、前記圧縮機２０から吐出された高温高圧の冷媒は前記室外熱交換器２１に流入し、同室外熱交換器２０で熱を放出して凝縮する。凝縮した冷媒は前記室外熱交換器用膨張弁２４により断熱膨張し、続いて前記室内熱交換器用膨張弁２５により個々に絞り量を調整されて前記室内熱交換器２２に流入する。同室内熱交換器２２に流入した冷媒は周囲の熱を吸収して蒸発し、蒸発した冷媒は前記アキュームレータ２３を経て前記圧縮機２０に還流するようになっている。   When the above-described refrigerant circuit performs a cooling operation, the high-temperature and high-pressure refrigerant discharged from the compressor 20 flows into the outdoor heat exchanger 21 and releases heat in the outdoor heat exchanger 20 to condense. The condensed refrigerant is adiabatically expanded by the outdoor heat exchanger expansion valve 24, and then the throttle amount is individually adjusted by the indoor heat exchanger expansion valve 25 and flows into the indoor heat exchanger 22. The refrigerant flowing into the indoor heat exchanger 22 absorbs ambient heat and evaporates, and the evaporated refrigerant flows back to the compressor 20 through the accumulator 23.

前記圧縮機２０が停止すると、所定時間を経て前記バイパス路２６に備えられた前記バイパス弁２７が制御部２８により開度を調整されながら開放されるようになっている。これにより前記圧縮機２０の吐出側配管内に滞留する高圧の冷媒は、前記バイパス路２６により前記圧縮機２０の吸込側配管に戻り、圧力を均衡させるようになっている。前記圧縮機２０内は高圧と低圧との中間となる中間圧力となり、同圧縮機２０の再起動が短時間内に行えるようになっている。   When the compressor 20 is stopped, the bypass valve 27 provided in the bypass passage 26 is opened while the opening degree is adjusted by the control unit 28 after a predetermined time. As a result, the high-pressure refrigerant that remains in the discharge-side piping of the compressor 20 returns to the suction-side piping of the compressor 20 through the bypass passage 26 and balances the pressure. The compressor 20 has an intermediate pressure between the high pressure and the low pressure so that the compressor 20 can be restarted within a short time.

しかしながら、前記圧縮機２０がスクロール型の圧縮機からなる場合、運転を停止した瞬間に、吐出側の高圧冷媒がスクロール圧縮機の密閉容器内に逆流する現象が発生する。同現象により密閉容器内で旋回駆動される旋回スクロールが押圧され、同旋回スクロールのラップと固定スクロールのラップの噛合位置がずれる場合がある。この状態で運転を再開すると前記圧縮機２０から異音が発生するとともに、旋回スクロールあるいは固定スクロールに支障を生じる虞があった。上記した圧縮機の停止後に前記バイパス路２６に備えられた前記バイパス弁２７を開放し、高圧の冷媒を吸込側の低圧冷媒に還流させ、前記圧縮機２０内を中間圧力に早期に復帰させる方法は、運転の再起動時間の短縮は行えるが、旋回スクロールと固定スクロールとのラップの噛合ずれを防止するには不充分であった。   However, when the compressor 20 is a scroll type compressor, a phenomenon occurs in which the high-pressure refrigerant on the discharge side flows backward into the sealed container of the scroll compressor at the moment when the operation is stopped. Due to the same phenomenon, the orbiting scroll that is orbitally driven in the hermetic container is pressed, and the meshing position of the orbiting scroll wrap and the fixed scroll lap may shift. When the operation is resumed in this state, an abnormal noise is generated from the compressor 20, and there is a possibility that the orbiting scroll or the fixed scroll may be disturbed. A method of opening the bypass valve 27 provided in the bypass passage 26 after the stop of the compressor and returning the high-pressure refrigerant to the low-pressure refrigerant on the suction side, thereby quickly returning the inside of the compressor 20 to the intermediate pressure. Although the restart time of the operation can be shortened, it is insufficient to prevent the meshing misalignment of the orbiting scroll and the fixed scroll.

特開２００２−３６４９３８号JP 2002-364938

本発明は、上記問題点に鑑み、圧縮機が一旦停止した際、旋回スクロールと固定スクロールのラップのズレを防止するとともに、これに起因する再起動した際の異音あるいは起動音を抑制できる空気調和機を提供することを目的とする。   In view of the above-described problems, the present invention prevents the lap between the orbiting scroll and the fixed scroll when the compressor is temporarily stopped, and can suppress the abnormal noise or the startup noise caused by the restart. The purpose is to provide a harmony machine.

本発明は、上記課題を解決するため、圧縮機と、室外熱交換器と、膨張弁と、室内熱交換器とを配管接続するとともに、前記圧縮機及び前記膨張弁等を制御する制御部を備え、前記圧縮機の吐出側と吸込側との間に、開閉弁を備えたバイパス路を接続してなる空気調和機において、前記制御部が運転停止信号を受けた際、同制御部により前記バイパス路の開閉弁を開放した後、所定時間をおいて前記圧縮機に停止信号を送出する構成となっている。又、前記開閉弁が、電子膨張弁からなる構成となっている。   In order to solve the above-mentioned problems, the present invention provides a control unit for connecting the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger, and controlling the compressor and the expansion valve. An air conditioner in which a bypass passage having an on-off valve is connected between a discharge side and a suction side of the compressor, and when the control unit receives an operation stop signal, the control unit After opening the on-off valve of the bypass passage, a stop signal is sent to the compressor after a predetermined time. The on-off valve is composed of an electronic expansion valve.

本発明によると、圧縮機の吐出側と吸込側とを結ぶ、開閉弁を備えたバイパス路を設け、冷暖房運転を停止する際、圧縮機の停止直前に前記バイパス路に備えられた開閉弁を開放し、圧縮機の吐出側の高圧冷媒を、圧縮機の吸込側の低圧冷媒に還流させることにより、圧縮機内に備えられた固定スクロールと旋回スクロールとのズレを防いで、圧縮機再起動の際の起動音発生を防止できるとともに、再起動時間を短縮できるようになっている。又、除霜運転の際も、暖房運転から除霜運転更に暖房運転再開時における圧縮機の起動音発生を防止して円滑な除霜運転を行うことのできる空気調和機とすることができる。   According to the present invention, the bypass passage provided with the opening / closing valve that connects the discharge side and the suction side of the compressor is provided, and when the cooling / heating operation is stopped, the opening / closing valve provided in the bypass passage immediately before the stop of the compressor is provided. Open and recirculate the high-pressure refrigerant on the discharge side of the compressor to the low-pressure refrigerant on the suction side of the compressor to prevent misalignment between the fixed scroll and the orbiting scroll provided in the compressor, and restart the compressor It is possible to prevent the start-up sound from being generated and to shorten the restart time. In addition, even during the defrosting operation, it is possible to provide an air conditioner that can perform a smooth defrosting operation by preventing the start-up noise of the compressor during the heating operation, the defrosting operation, and the resumption of the heating operation.

以下、本発明の実施の形態を、添付図面に基づいた実施例として詳細に説明する。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

図１は本発明による空気調和機の冷媒回路であり、図２は、バイパス路に設けられた開閉弁の冷暖房運転停止時におけるタイミングチャートである。又、図３は暖房運転から除霜運転を行い再び暖房運転に切換えられる際のタイミングチャートである。   FIG. 1 is a refrigerant circuit of an air conditioner according to the present invention, and FIG. 2 is a timing chart when an on-off valve provided in a bypass passage is stopped in an air conditioning operation. FIG. 3 is a timing chart when the defrosting operation is changed from the heating operation to the heating operation again.

本発明による空気調和機の冷媒回路は、図１で示すように、圧縮機１と四方弁２と室外熱交換器３と膨張弁４と室内熱交換器５とを順次接続するとともに、開閉弁７を備え前記圧縮機１の吐出側と吸込側とを結ぶバイパス路６を設けて冷媒回路を構成している。又、前記圧縮機１と、前記四方弁２と、前記膨張弁４と、前記開閉弁７とは、これらを制御する制御部８に制御線により接続されている。   As shown in FIG. 1, the refrigerant circuit of the air conditioner according to the present invention sequentially connects a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion valve 4, and an indoor heat exchanger 5, and an on-off valve. The refrigerant circuit is configured by providing a bypass passage 6 that connects the discharge side and the suction side of the compressor 1. The compressor 1, the four-way valve 2, the expansion valve 4, and the on-off valve 7 are connected by a control line to a control unit 8 that controls them.

前記圧縮機１はスクロール型の圧縮機であり、同スクロール型の圧縮機は、従来技術でも説明したように、密閉容器内に、渦巻状のラップを備えた固定スクロールと、同固定スクロールのラップと噛合するラップを備え旋回駆動される旋回スクロールを備えており、両ラップ間に形成される圧縮空間に冷媒ガスを導びき、その体積を暫時減少させていって冷媒ガスを圧縮し、高温高圧へと変換させるようになっている。しかしながら、圧縮機を停止した際、吐出した高温高圧の冷媒ガスが圧縮空間に逆流し、旋回スクロールのラップと固定スクロールのラップとの噛合位置がずれる場合があり、この状態で圧縮機を再起動させると、旋回スクロールと固定スクロールとのラップ間で異音所謂起動音が発生する場合がある。   The compressor 1 is a scroll-type compressor, and as described in the prior art, the scroll-type compressor includes a fixed scroll having a spiral wrap and a wrap of the fixed scroll in a sealed container. Rotating scroll that is driven to rotate with a lap that meshes with the wrapping gas. Refrigerant gas is introduced into the compression space formed between the two wraps, and its volume is reduced for a while to compress the refrigerant gas. It is supposed to be converted to. However, when the compressor is stopped, the discharged high-temperature and high-pressure refrigerant gas may flow back into the compression space, and the meshing position of the orbiting scroll wrap and the fixed scroll wrap may shift. In this state, restart the compressor. If this is done, there is a case where a so-called startup sound is generated between the laps of the orbiting scroll and the fixed scroll.

次に、各モードの運転における冷媒の流れについて説明する。冷房運転では、図１の実線矢印で示すように、前記圧縮機１から吐出された高温高圧の冷媒は、前記四方弁２を介して前記室外熱交換器３に流入する。同室外熱交換器３に流入した冷媒は周囲に熱を放出して凝縮し、続いて前記膨張弁４により絞られて断熱膨張し低温低圧となる。低温低圧となった冷媒は次に前記室内熱交換器５に流入し、同室内熱交換器５で周囲を流れる空気から熱を吸収して蒸発する。蒸発した冷媒は前記四方弁２を介して前記圧縮機１に還流するようになっている。   Next, the flow of the refrigerant in each mode of operation will be described. In the cooling operation, the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the outdoor heat exchanger 3 through the four-way valve 2 as indicated by solid arrows in FIG. The refrigerant that has flowed into the outdoor heat exchanger 3 releases heat to the surroundings and condenses, and is then throttled by the expansion valve 4 to adiabatically expand to a low temperature and low pressure. The low-temperature and low-pressure refrigerant then flows into the indoor heat exchanger 5, and evaporates by absorbing heat from the air flowing around the indoor heat exchanger 5. The evaporated refrigerant is returned to the compressor 1 through the four-way valve 2.

暖房運転では、図１の破線矢印で示すように、前記圧縮機１から吐出された高温高圧の冷媒は、切換られた前記四方弁２を介して前記室内熱交換器５に流入する。同室内熱交換器５に流入した冷媒は周囲を流れる空気に熱を放出して凝縮し、続いて前記膨張弁４により絞られて断熱膨張し低温低圧となる。低温低圧となった冷媒は次に前記室外熱交換器３に流入し、同室外熱交換器３で熱を吸収して蒸発する。蒸発した冷媒は前記四方弁２を介して前記圧縮機１に還流するようになっている。   In the heating operation, as indicated by broken line arrows in FIG. 1, the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the indoor heat exchanger 5 through the switched four-way valve 2. The refrigerant flowing into the indoor heat exchanger 5 releases heat to the surrounding air and condenses, and is then throttled by the expansion valve 4 to adiabatically expand to a low temperature and low pressure. The refrigerant that has become low temperature and low pressure then flows into the outdoor heat exchanger 3 and absorbs heat in the outdoor heat exchanger 3 to evaporate. The evaporated refrigerant is returned to the compressor 1 through the four-way valve 2.

低外気温且つ高湿度の状態で上記した暖房運転を行うと、前記室外熱交換器３の表面に霜が発生し、同室外熱交換器３での熱交換に支障が生じるため除霜運転が行われる。除霜運転は前記四方弁２を再び切換えて上記した冷房運転のように前記圧縮機１から高温高圧の冷媒を前記室外熱交換器３に流入させ加熱して、付着した霜が溶融した後、再び暖房運転に切換えられるようになっている。   When the above-described heating operation is performed in a low outdoor temperature and high humidity state, frost is generated on the surface of the outdoor heat exchanger 3 and heat exchange in the outdoor heat exchanger 3 is hindered. Done. In the defrosting operation, the four-way valve 2 is switched again, and the high-temperature and high-pressure refrigerant flows from the compressor 1 into the outdoor heat exchanger 3 and is heated as in the cooling operation described above. It can be switched to heating operation again.

次に、上記した冷暖房運転を停止させる際の動作について説明する。図２のタイミングチャートで示すように、冷暖房運転を一定時間継続した後、運転を停止させるため停止釦を印加すると、前記制御部８から前記バイパス路６に設けられた前記開閉弁７に信号が送出され同開閉弁７が開放されるようになっている。これにより前記圧縮機１の吐出側配管内の高圧冷媒は前記バイパス路６を介して前記圧縮機１の吸込側配管の低圧冷媒に還流する。高圧の冷媒が低圧の冷媒に還流されると前記圧縮機１内の圧力が緩和され、高圧と低圧の約中間となる中間圧力となる。次に、前記制御部８から前記圧縮機１に停止信号が送出されると旋回スクロールの旋回駆動が止まり同圧縮機１が停止するようになっている。続いてある一定時間を経た後、前記開閉弁７が閉鎖されるようになっている。前記開閉弁７が開放されてから前記圧縮機１が停止するまでの時間は約１０〜１５秒程度である。   Next, an operation when stopping the above-described air conditioning operation will be described. As shown in the timing chart of FIG. 2, when a stop button is applied to stop the operation after the air conditioning operation is continued for a certain time, a signal is sent from the control unit 8 to the on-off valve 7 provided in the bypass path 6. The on-off valve 7 is sent out and opened. As a result, the high-pressure refrigerant in the discharge-side piping of the compressor 1 returns to the low-pressure refrigerant in the suction-side piping of the compressor 1 via the bypass passage 6. When the high-pressure refrigerant is recirculated to the low-pressure refrigerant, the pressure in the compressor 1 is relieved to an intermediate pressure that is approximately between the high pressure and the low pressure. Next, when a stop signal is sent from the control unit 8 to the compressor 1, the turning drive of the orbiting scroll is stopped and the compressor 1 is stopped. Subsequently, after a certain period of time, the on-off valve 7 is closed. The time from when the on-off valve 7 is opened to when the compressor 1 is stopped is about 10 to 15 seconds.

前記圧縮機１が中間圧力状態となってから停止されることにより、吐出側の高圧冷媒が同圧縮機１の密閉容器内に逆流する現象を極力抑制でき、固定スクロールと旋回スクロールのラップの噛合位置がずれることを防止できるようになっている。これにより圧縮機を再起動した際の噛合位置のずれによるキシミ音所謂起動音の発生を防ぎ、円滑な運転の立ち上がりを行えるようになっている。尚、前記開閉弁７は電磁弁あるいは電子膨張弁どちらで構成してもよく、電磁弁は、図２のタイミングチャートの実線で示すように、前記制御部８が信号を送出した場合、瞬間的に開放されるが、電磁開閉弁は破線で示すように、徐々に開放され、圧力の変動を極力抑制できるようになっている。   When the compressor 1 is stopped after being in an intermediate pressure state, the phenomenon that the high-pressure refrigerant on the discharge side flows back into the sealed container of the compressor 1 can be suppressed as much as possible, and the meshing of the wrap between the fixed scroll and the orbiting scroll The position can be prevented from shifting. This prevents the occurrence of a so-called starting sound due to a shift in the meshing position when the compressor is restarted, thereby enabling a smooth start of operation. The on-off valve 7 may be composed of either an electromagnetic valve or an electronic expansion valve. The electromagnetic valve is instantaneous when the control unit 8 sends a signal, as shown by the solid line in the timing chart of FIG. However, as shown by the broken line, the electromagnetic on-off valve is gradually opened to suppress pressure fluctuation as much as possible.

次に、除霜運転の動作について説明する。暖房運転を開始した際、前記室外熱交換器３の表面に霜付きが検出された場合は、霜を除去するため暖房運転から除霜運転に一時的に切換られる。図３で示すように、除霜運転に切換えられる際、前記制御部８からは前記バイパス路６に設けられた前記開閉弁７に信号が送出され同開閉弁７が開放されるようになっている。これにより前記圧縮機１の吐出側配管内の高圧冷媒は前記バイパス路６を介して前記圧縮機１の吸込側配管の低圧冷媒に還流する。次に前記圧縮機１が停止され、続いて前記四方弁２が切換えられる。   Next, the operation of the defrosting operation will be described. When frosting is detected on the surface of the outdoor heat exchanger 3 when the heating operation is started, the heating operation is temporarily switched to the defrosting operation in order to remove the frost. As shown in FIG. 3, when switching to the defrosting operation, a signal is sent from the control unit 8 to the on-off valve 7 provided on the bypass path 6 so that the on-off valve 7 is opened. Yes. As a result, the high-pressure refrigerant in the discharge-side piping of the compressor 1 returns to the low-pressure refrigerant in the suction-side piping of the compressor 1 via the bypass passage 6. Next, the compressor 1 is stopped, and then the four-way valve 2 is switched.

前記四方弁２が切換えられた後、前記開閉弁７が閉鎖され、続いて前記圧縮機１が駆動されて除霜運転が開始される。一定の時間をおいて除霜が完了すると、前記開閉弁７が再び開放され、所定の時間をおいて前記圧縮機１が再び停止され除霜運転が終了する。続いて前記開閉弁７が閉鎖されるとともに前記四方弁２が切換えられ、暖房運転が再開されるようになっている。   After the four-way valve 2 is switched, the on-off valve 7 is closed, and then the compressor 1 is driven to start the defrosting operation. When the defrosting is completed after a certain period of time, the on-off valve 7 is opened again, the compressor 1 is stopped again after a predetermined time, and the defrosting operation is completed. Subsequently, the on-off valve 7 is closed and the four-way valve 2 is switched so that the heating operation is resumed.

上記したように除霜運転においても、前記圧縮機１が停止する直前に前記開閉弁７が開放されて、前記圧縮機１の密閉容器内圧力を中間圧力とするため、固定スクロールと旋回スクロールとのズレを防いで、再起動する際の起動音を防止できるとともに、再起動時間も短縮することができるようになっている。   As described above, also in the defrosting operation, the on-off valve 7 is opened immediately before the compressor 1 stops, and the pressure inside the sealed container of the compressor 1 is set to an intermediate pressure. It is possible to prevent the start-up noise and prevent the start-up sound at the time of restart, and the restart time can be shortened.

以上、説明したように、圧縮機が停止する前にバイパス弁を開放することにより、異音を発生させることなく運転を再開することができ、又圧縮機の旋回スクロールあるいは固定スクロールに歪みが生じるような支障を防止することができるようになっている。これらは、圧縮機の停止後にバイパス弁を開放して圧縮機内を中間圧力とする方法では得られない効果であり、圧縮機の安全性を向上させることができるようになっている。   As described above, by opening the bypass valve before the compressor stops, the operation can be resumed without generating abnormal noise, and the orbiting scroll or the fixed scroll of the compressor is distorted. Such troubles can be prevented. These are effects that cannot be obtained by a method in which the bypass valve is opened after the compressor is stopped to make the inside of the compressor have an intermediate pressure, and the safety of the compressor can be improved.

本発明による空気調和機の冷媒回路図である。It is a refrigerant circuit diagram of the air conditioner by this invention. 冷暖房運転を停止する際の圧縮機と開閉弁の動作タイミングチャートである。It is an operation timing chart of a compressor and an on-off valve at the time of stopping air conditioning operation. 除霜運転の際の動作タイミングチャートである。It is an operation | movement timing chart in the case of a defrost driving | operation. 従来例による空気調和機を示す冷媒回路図である。It is a refrigerant circuit figure which shows the air conditioner by a prior art example.

符号の説明Explanation of symbols

１ 圧縮機
２ 四方弁
３ 室外熱交換器
４ 膨張弁
５ 室内熱交換器
６ バイパス路
７ 開閉弁
８ 制御部

DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Expansion valve 5 Indoor heat exchanger 6 Bypass path 7 On-off valve 8 Control part

Claims (2)

圧縮機と、室外熱交換器と、膨張弁と、室内熱交換器とを配管接続するとともに、前記圧縮機及び前記膨張弁等を制御する制御部を備え、前記圧縮機の吐出側と吸込側との間に、開閉弁を備えたバイパス路を接続してなる空気調和機において、
前記制御部が運転停止信号を受けた際、同制御部により前記バイパス路の開閉弁を開放した後、所定時間をおいて前記圧縮機に停止信号を送出してなることを特徴とする空気調和機。 A compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are connected by pipes, and includes a control unit that controls the compressor, the expansion valve, and the like, and includes a discharge side and a suction side of the compressor In an air conditioner formed by connecting a bypass with an on-off valve between
When the control unit receives an operation stop signal, the control unit opens the on-off valve of the bypass passage and then sends a stop signal to the compressor after a predetermined time. Machine. 前記開閉弁が、電子膨張弁からなることを特徴とする請求項１に記載の空気調和機。 The air conditioner according to claim 1, wherein the on-off valve is an electronic expansion valve.
JP2004039352A 2004-02-17 2004-02-17 Air conditioner Pending JP2005233441A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009024929A (en) * 2007-07-19 2009-02-05 Mitsubishi Electric Corp Compressor control device, refrigerating air conditioning device and rotary compressor
CN113188269A (en) * 2020-01-13 2021-07-30 上海海立电器有限公司 Shutdown control method and device of enthalpy-increasing heat pump system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009024929A (en) * 2007-07-19 2009-02-05 Mitsubishi Electric Corp Compressor control device, refrigerating air conditioning device and rotary compressor
CN113188269A (en) * 2020-01-13 2021-07-30 上海海立电器有限公司 Shutdown control method and device of enthalpy-increasing heat pump system
CN113188269B (en) * 2020-01-13 2022-08-09 上海海立电器有限公司 Shutdown control method and device of enthalpy-increasing heat pump system

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