JP4752541B2 - Air conditioner - Google Patents
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- JP4752541B2 JP4752541B2 JP2006054553A JP2006054553A JP4752541B2 JP 4752541 B2 JP4752541 B2 JP 4752541B2 JP 2006054553 A JP2006054553 A JP 2006054553A JP 2006054553 A JP2006054553 A JP 2006054553A JP 4752541 B2 JP4752541 B2 JP 4752541B2
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Description
本発明は、空気調和装置の暖房運転時の除霜に関するものである。 The present invention relates to defrosting during heating operation of an air conditioner.
低外気温度下での暖房運転において、室外熱交換器に着霜が進行した場合、空気調和装置における冷凍サイクルを四方弁により冷房サイクルに切り替え、高温の吐出ガスを室外熱交換器へ流入するようにして除霜するのが一般的である（例えば、特許文献１参照）。 When frosting has progressed in the outdoor heat exchanger during heating operation at a low outside air temperature, the refrigeration cycle in the air conditioner is switched to the cooling cycle by a four-way valve so that the hot discharge gas flows into the outdoor heat exchanger. In general, defrosting is performed (see, for example, Patent Document 1).
図７は、特許文献１に示される従来の空気調和装置の冷凍サイクル図である。ここでは、室内熱交換器１０３、減圧器１０４間に第１の電磁開閉弁１０８を介装するとともに、
減圧器１０４と第１の電磁開閉弁１０８との間の点Ａから、室内熱交換器１０５と四方弁１０２との間の点Ｂにバイパス管１１０を接続し、同バイパス管１１０に第２の電磁開閉弁１１１を介装し、暖房運転時に第１の電磁開閉弁１０８を開放し、第２の電磁開閉弁１１１を閉塞することにより、室内熱交換器１０５に熱い冷媒を流すようにし、除霜運転時に第１の電磁開閉弁１０８を閉塞し、第２の電磁開閉弁１１１を開放して冷たい冷媒をバイパス管１１０を通して四方弁１０２に戻し、室内熱交換器１０５に流入しないようにした技術が開示されている。
A bypass pipe 110 is connected from a point A between the pressure reducer 104 and the first electromagnetic switching valve 108 to a point B between the indoor heat exchanger 105 and the four-way valve 102, and a second pipe is connected to the bypass pipe 110. An electromagnetic on-off valve 111 is interposed, the first electromagnetic on-off valve 108 is opened during heating operation, and the second electromagnetic on-off valve 111 is closed to allow hot refrigerant to flow through the indoor heat exchanger 105. Technology in which the first electromagnetic on-off valve 108 is closed during the frost operation, the second electromagnetic on-off valve 111 is opened, and the cold refrigerant is returned to the four-way valve 102 through the bypass pipe 110 so as not to flow into the indoor heat exchanger 105. Is disclosed.
しかしながら、除霜サイクルが進行し室外熱交換器の霜が融解してくると、生じた水が下方へ流れ落ち、室外熱交換器最下段に保水される傾向にある。この状態で除霜サイクルが終了し再び暖房運転が始まると、室外熱交換器下部に保水された水が凍り着氷となり、何度除霜サイクルを繰り返しても溶けきることがない場合がある。このような状態になると暖房運転時の吸熱能力が低下し暖房能力不足となるばかりでなく、除霜頻度も増加し快適性を妨げる場合があった。 However, when the defrost cycle progresses and the frost of the outdoor heat exchanger is melted, the generated water flows downward and tends to be retained in the lowermost stage of the outdoor heat exchanger. When the defrost cycle is completed in this state and the heating operation is started again, the water retained in the lower part of the outdoor heat exchanger becomes frozen and icing, and may not melt even if the defrost cycle is repeated many times. In such a state, not only the heat absorption capability during heating operation decreases and the heating capability becomes insufficient, but also the frequency of defrosting increases, which may impair comfort.
本発明は、上記従来の課題を解決するもので、除霜時に室外熱交換器最下段に吐出ガスをバイパスすることにより、室外熱交換器下部に保水するのを防ぐとともに、次回暖房運転時に着氷するのを防ぎ、暖房運転の快適性が低下することを抑制することができる空気調和装置の提供を目的とする。 The present invention solves the above-mentioned conventional problems, and by bypassing the discharge gas at the lowest stage of the outdoor heat exchanger during defrosting, it prevents water from being retained at the lower part of the outdoor heat exchanger and is also applied during the next heating operation. An object of the present invention is to provide an air conditioner that can prevent icing and suppress a decrease in comfort of heating operation.
上記課題を解決するために本発明は、吐出ガス管、電磁弁、キャピラリーチューブ及び室外熱交換器最下段に配した熱交換器過冷却管入口を順次接続する吐出ガスバイパス回路を具備し、除霜時に電磁弁を開動作、すなわち吐出ガスを室外熱交換器過冷却管にバイパスする。 In order to solve the above problems, the present invention comprises a discharge gas bypass circuit that sequentially connects a discharge gas pipe, a solenoid valve, a capillary tube, and a heat exchanger subcooling pipe inlet arranged at the lowest stage of the outdoor heat exchanger. The electromagnetic valve is opened during frosting, that is, the discharge gas is bypassed to the outdoor heat exchanger supercooling pipe.
以上のように本発明の空気調和装置は、吐出ガス管、電磁弁、キャピラリーチューブ及び室外熱交換器最下段に配した熱交換器過冷却管入口を順次接続する吐出ガスバイパス回路を具備し、除霜時に電磁弁を開動作、すなわち吐出ガスを室外熱交換器過冷却管にバイパスすることにより、除霜により溶け出た水が室外熱交換器下部に保水されるのを防ぎ、次回暖房運転時に着氷するのを未然に防ぐことができるもので、暖房運転時の吸熱能力低下による暖房能力不足を防ぐことができるばかりでなく、除霜頻度も低減でき、暖房運転の快適性が低下することを抑制する。 As described above, the air conditioning apparatus of the present invention includes a discharge gas bypass circuit that sequentially connects a discharge gas pipe, a solenoid valve, a capillary tube, and a heat exchanger subcooling pipe inlet arranged at the lowest stage of the outdoor heat exchanger, During defrosting, the solenoid valve is opened, that is, the discharge gas is bypassed to the outdoor heat exchanger subcooling pipe to prevent the water melted by the defrosting from being retained in the lower part of the outdoor heat exchanger, and the next heating operation It is possible to prevent icing at times, and not only can it prevent the lack of heat absorption capacity due to a decrease in heat absorption capacity during heating operation, but it can also reduce the frequency of defrosting and reduce the comfort of heating operation. To suppress that.
第１の発明は、圧縮機と、過冷却管を有する室外熱交換器と、室外送風機と、電動式膨張弁と、四方弁と、室外熱交換器温度検出手段と、外気温度検出手段と、室外機制御装置とを備えた室外機と、室内熱交換器と、室内送風機と、電動式膨張弁と、吸い込み空気温度検出手段と、室内機制御装置とを備えた室内機と、前記圧縮機と前記四方弁とを接続する吐出ガス管と前記過冷却管の入口側配管との間に、電磁弁とキャピラリーチューブとを直列に接続する吐出ガスバイパス回路と、室外熱交換器の温度を検出する室外熱交換器温度検出手段と、過冷却管出口温度を検出する過冷却管出口温度検出手段とを備え、前記過冷却管を前記室外熱交換器の最下段に配置するとともに、暖房運転の除霜時に電磁弁を開動作して吐出ガスをバイパスするようにした空気調和装置であって、除霜時に、室外熱交換器温度が所定の温度以上になり、かつ、過冷却管出口温度が所定の温度以上になるまで電磁弁を開動作するようにしたことにより、除霜により溶け出た水が室外熱交換器下部に
保水されるのを防ぎ、次回暖房運転時に着氷するのを未然に防ぐことができ、除霜頻度も低減でき、除霜サイクルが終了する条件になっているにもかかわらず室外熱交換器過冷却管の除霜が完全に終了していない場合に、室外熱交換器過冷却管が完全に除霜し終わるまで除霜サイクルを継続しつつ、除霜により溶け出た水が室外熱交換器下部に保水されるのを防ぎ、次回暖房運転時に着氷するのを未然に防ぐことができ、除霜頻度も低減できる。
The first invention includes a compressor, an outdoor heat exchanger having a supercooling pipe, an outdoor blower, an electric expansion valve, a four-way valve, an outdoor heat exchanger temperature detection means, an outdoor air temperature detection means, and an outdoor unit having an outdoor unit control device, an indoor heat exchanger, and the indoor blower, and an electric expansion valve, and an air temperature detecting means intake, and an indoor unit having an indoor unit control device, the compressor A discharge gas bypass circuit connecting a solenoid valve and a capillary tube in series between the discharge gas pipe connecting the four-way valve and the inlet side pipe of the supercooling pipe, and detecting the temperature of the outdoor heat exchanger An outdoor heat exchanger temperature detecting means for detecting and a supercooling pipe outlet temperature detecting means for detecting a subcooling pipe outlet temperature, and arranging the supercooling pipe at the lowest stage of the outdoor heat exchanger , During defrosting, the solenoid valve is opened to bypass the discharge gas. As in the the air conditioning apparatus, when defrosting, as the outdoor heat exchanger temperature becomes equal to or higher than a predetermined temperature, and, for opening operation of the solenoid valve to the subcooling tube outlet temperature is equal to or higher than a predetermined temperature by the water exiting melted by the defrosting can be prevented from being water retention in the lower outdoor heat exchanger, can be prevented from icing during the next heating operation can also be reduced defrosting frequency, defrost If the defrosting of the outdoor heat exchanger supercooling pipe has not been completed completely even though the cycle has been completed, the defrosting is performed until the outdoor heat exchanger supercooling pipe is completely defrosted. While continuing the cycle, it is possible to prevent the water melted by the defrosting from being retained in the lower part of the outdoor heat exchanger, to prevent icing in the next heating operation, and to reduce the defrosting frequency.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、本実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.
（実施の形態１）
図１は本発明の実施の形態における空気調和装置の冷凍サイクルの模式図である。同図において、空気調和装置は、圧縮機１、最下段に過冷却管１１を具備した室外熱交換器２、室外送風機３、減圧自在な電動式膨張弁４、冷房運転と暖房運転を切換える四方弁５、室外熱交換器温度検出手段６、外気温度検出手段７、圧縮機１と四方弁５とを接続する吐出ガス管１３と過冷却管１１の入口側配管１１ａとの間に、電磁弁８とキャピラリーチューブ９とを直列に接続してなる吐出ガスバイパス回路１０、過冷却管１１の出口近傍に配した過冷却管出口温度検出手段１２、室外機制御装置１４とを備えた室外機１５と、室内熱交換器１６、室内送風機１７、減圧可能な電動式膨張弁１８、吸い込み空気温度検出手段１９、室内機制御装置２０とを備えた室内機２１とで構成されている。
(Embodiment 1)
FIG. 1 is a schematic diagram of a refrigeration cycle of an air conditioner according to an embodiment of the present invention. In the figure, an air conditioner includes a compressor 1, an outdoor heat exchanger 2 having a supercooling pipe 11 at the lowest stage, an outdoor blower 3, an electric expansion valve 4 that can be depressurized, and a four-way switching between a cooling operation and a heating operation. Between the valve 5, the outdoor heat exchanger temperature detecting means 6, the outside air temperature detecting means 7, the discharge gas pipe 13 connecting the compressor 1 and the four-way valve 5, and the inlet side pipe 11 a of the supercooling pipe 11, an electromagnetic valve 8 and an outdoor unit 15 including a discharge gas bypass circuit 10 formed by connecting a capillary tube 9 in series, a supercooling pipe outlet temperature detecting means 12 disposed in the vicinity of the outlet of the supercooling pipe 11, and an outdoor unit controller 14. And an indoor unit 21 including an indoor heat exchanger 16, an indoor blower 17, an electric expansion valve 18 that can be depressurized, an intake air temperature detection means 19, and an indoor unit control device 20.
図２は本発明の実施の形態１における空気調和装置の運転制御方法を説明するためのフローチャートである。暖房運転において、室外熱交換器に着霜が進行したことにともなう除霜運転について示す。図２において、除霜運転開始にともない、吐出ガスバイパス回路１０の電磁弁８をＯＮすなわち開動作して、吐出ガス管１３から過冷却管１１の入口側配管１１ａへ吐出ガスを流入させる（Ｓｔｅｐ１）。室外熱交換器温度検出手段６により室外熱交換器温度Ｔｅ１を検出し（Ｓｔｅｐ２）、室外熱交換器温度Ｔｅ１と所定の設定値Ｓとを室外機制御装置１４で比較し（Ｓｔｅｐ３）、Ｔｅ１≧Ｓであれば電磁弁８をＯＦＦすなわち吐出ガスのバイパスを停止し（Ｓｔｅｐ４）、さらに除霜運転を終了し暖房運転を再開する。 FIG. 2 is a flowchart for explaining the operation control method of the air-conditioning apparatus according to Embodiment 1 of the present invention. In the heating operation, the defrosting operation associated with the progress of frost formation on the outdoor heat exchanger will be described. In FIG. 2, with the start of the defrosting operation, the solenoid valve 8 of the discharge gas bypass circuit 10 is turned on, that is, opened, and the discharge gas flows from the discharge gas pipe 13 into the inlet side pipe 11a of the supercooling pipe 11 (Step 1 ). The outdoor heat exchanger temperature detection means 6 detects the outdoor heat exchanger temperature Te1 (Step 2), the outdoor heat exchanger temperature Te1 is compared with a predetermined set value S by the outdoor unit control device 14 (Step 3), and Te1 ≧ If S, the solenoid valve 8 is turned off, that is, the bypass of the discharge gas is stopped (Step 4), the defrosting operation is terminated, and the heating operation is restarted.
これらの動作により、室外熱交換器２の最下段に配した過冷却管１１に除霜により溶け出た水が保水されるのを防ぎ、次回暖房運転時に着氷するのを未然に防ぐことができ、除霜頻度も低減できる。 By these operations, it is possible to prevent water melted by defrosting from being retained in the supercooling pipe 11 disposed at the lowest stage of the outdoor heat exchanger 2 and to prevent icing in the next heating operation. And defrosting frequency can be reduced.
（実施の形態２）
図３は本発明の実施の形態２における空気調和装置の運転制御方法を説明するためのフローチャートである。除霜運転開始にともない、電磁弁８をＯＮすなわち開動作して、吐出ガス管１３から過冷却管１１の入口側配管１１ａへ吐出ガスを流入させる（Ｓｔｅｐ１１）。室外熱交換器過冷却管温度検出手段１２により室外熱交換器過冷却管温度Ｔｅ２を検出し（Ｓｔｅｐ１２）、室外熱交換器過冷却管温度Ｔｅ２と所定の設定値Ｒとを室外機制御装置１４で比較し（Ｓｔｅｐ１３）、Ｔｅ２≧Ｒであれば電磁弁８をＯＦＦすなわち吐出ガスのバイパスを停止し（Ｓｔｅｐ１４）、さらに除霜運転を終了し暖房運転を再開する。
(Embodiment 2)
FIG. 3 is a flowchart for explaining the operation control method of the air-conditioning apparatus according to Embodiment 2 of the present invention. With the start of the defrosting operation, the electromagnetic valve 8 is turned on, that is, opened, and the discharge gas flows from the discharge gas pipe 13 to the inlet side pipe 11a of the supercooling pipe 11 (Step 11). The outdoor heat exchanger subcooling tube temperature Te2 is detected by the outdoor heat exchanger subcooling tube temperature detection means 12 (Step 12), and the outdoor heat exchanger subcooling tube temperature Te2 and a predetermined set value R are set to the outdoor unit control device 14. (Step 13), and if Te2 ≧ R, the electromagnetic valve 8 is turned off, that is, the bypass of the discharge gas is stopped (Step 14), the defrosting operation is terminated, and the heating operation is restarted.
これらの動作により、室外熱交換器過冷却管１１が完全に除霜終了するまで吐出ガスバイパスを継続するので、次回暖房運転時に着氷するのを未然に防ぐことができ、除霜頻度も低減できる。 By these operations, the discharge gas bypass is continued until the outdoor heat exchanger supercooling pipe 11 is completely defrosted, so that it is possible to prevent icing in the next heating operation, and the defrost frequency is also reduced. it can.
（実施の形態３）
図４は本発明の実施の形態３における空気調和装置の運転制御方法を説明するためのフ
ローチャートである。除霜運転開始にともない、電磁弁８をＯＮすなわち開動作して、吐出ガス管１３から過冷却管１１の入口側配管１１ａへ吐出ガスを流入させる（Ｓｔｅｐ２１）。室外熱交換器温度検出手段６により室外熱交換器温度Ｔｅ１を検出するとともに、室外熱交換器過冷却管温度検出手段１２により室外熱交換器過冷却管温度Ｔｅ２を検出し（Ｓｔｅｐ２２）、室外熱交換器温度Ｔｅ１と所定の温度Ｓを室外機制御装置１４で比較、さらに室外熱交換器過冷却管温度Ｔｅ２と所定の設定値Ｒを同じく室外機制御装置１４で比較し（Ｓｔｅｐ２３）、Ｔｅ１≧Ｓ、或いはＴｅ２≧Ｒであれば電磁弁８をＯＦＦ、すなわち吐出ガスのバイパスを停止し（Ｓｔｅｐ２４）、さらに除霜運転を終了し暖房運転を再開する。
(Embodiment 3)
FIG. 4 is a flowchart for explaining an operation control method for the air-conditioning apparatus according to Embodiment 3 of the present invention. With the start of the defrosting operation, the solenoid valve 8 is turned on, that is, opened, and the discharge gas flows from the discharge gas pipe 13 to the inlet side pipe 11a of the supercooling pipe 11 (Step 21). The outdoor heat exchanger temperature detection means 6 detects the outdoor heat exchanger temperature Te1, and the outdoor heat exchanger subcooling pipe temperature detection means 12 detects the outdoor heat exchanger subcooling pipe temperature Te2 (Step 22), and the outdoor heat. The exchanger temperature Te1 and the predetermined temperature S are compared by the outdoor unit controller 14, and the outdoor heat exchanger subcooling pipe temperature Te2 and the predetermined set value R are also compared by the outdoor unit controller 14 (Step 23), and Te1 ≧ If S or Te2 ≧ R, the solenoid valve 8 is turned off, that is, the bypass of the discharge gas is stopped (Step 24), the defrosting operation is terminated, and the heating operation is restarted.
これらの動作により、室外熱交換器過冷却管１１が完全に除霜終了する、或いは長くとも除霜サイクルが終了するまで吐出ガスバイパスを継続するので、次回暖房運転時に着氷するのを未然に防ぐことができ、除霜頻度も低減できる。 By these operations, the discharge gas bypass is continued until the defrosting of the outdoor heat exchanger supercooling pipe 11 is completely completed or the defrosting cycle is completed at the longest, so that it is possible to prevent icing in the next heating operation. It can prevent and defrost frequency can also be reduced.
（実施の形態４）
図５は本発明の実施の形態４における空気調和装置の運転制御方法を説明するためのフローチャートである。除霜運転開始にともない、電磁弁８をＯＮすなわち開動作して、吐出ガス管１３から過冷却管１１の入口側配管１１ａへ吐出ガスを流入させる（Ｓｔｅｐ３１）。室外熱交換器温度検出手段６により室外熱交換器温度Ｔｅ１を検出するとともに、室外熱交換器過冷却管温度検出手段１２により室外熱交換器過冷却管温度Ｔｅ２を検出し（Ｓｔｅｐ３２）、室外熱交換器温度Ｔｅ１と所定の温度Ｓを室外機制御装置１４で比較、さらに室外熱交換器過冷却管温度Ｔｅ２と所定の設定値Ｒを同じく室外機制御装置１４で比較し（Ｓｔｅｐ３３）、Ｔｅ１≧Ｓ、かつＴｅ２≧Ｒであれば電磁弁８をＯＦＦ、すなわち吐出ガスのバイパスを停止し（Ｓｔｅｐ３４）、さらに除霜運転を終了し暖房運転を再開する。
(Embodiment 4)
FIG. 5 is a flowchart for explaining an operation control method of the air-conditioning apparatus according to Embodiment 4 of the present invention. With the start of the defrosting operation, the electromagnetic valve 8 is turned on, that is, opened, and the discharge gas flows from the discharge gas pipe 13 into the inlet side pipe 11a of the supercooling pipe 11 (Step 31). The outdoor heat exchanger temperature detection means 6 detects the outdoor heat exchanger temperature Te1, and the outdoor heat exchanger subcooling pipe temperature detection means 12 detects the outdoor heat exchanger subcooling pipe temperature Te2 (Step 32). The exchanger temperature Te1 and the predetermined temperature S are compared by the outdoor unit control device 14, and the outdoor heat exchanger subcooling pipe temperature Te2 and the predetermined set value R are also compared by the outdoor unit control unit 14 (Step 33), and Te1 ≧ If S and Te2 ≧ R, the solenoid valve 8 is turned off, that is, the bypass of the discharge gas is stopped (Step 34), the defrosting operation is terminated, and the heating operation is restarted.
これらの動作により、室外熱交換器過冷却管１１が完全に除霜終了するまで除霜サイクルを継続し、その間吐出ガスバイパスを開動作するので、次回暖房運転時に着氷するのを未然に防ぐことができ、除霜頻度も低減できる。 By these operations, the defrost cycle is continued until the outdoor heat exchanger supercooling pipe 11 is completely defrosted, and the discharge gas bypass is opened during that time, so that it is prevented from icing in the next heating operation. And defrosting frequency can be reduced.
（実施の形態５）
図６は本発明の実施の形態５における空気調和装置の運転制御方法を説明するためのフローチャートである。また、表１は外気温度ごとに定めた室外熱交換器温度及び過冷却管温度の設定値である。除霜運転開始にともない、電磁弁８をＯＮすなわち開動作して、吐出ガス管１３から過冷却管１１の入口側配管１１ａへ吐出ガスを流入させる（Ｓｔｅｐ４１）。室外熱交換器温度検出手段６により室外熱交換器温度Ｔｅ１を検出し、室外熱交換器過冷却管温度検出手段１２により室外熱交換器過冷却管温度Ｔｅ２を検出するとともに、外気温度検出手段７により外気温度Ｔａを検出し（Ｓｔｅｐ４２）、室外熱交換器温度Ｔｅ１と外気温度検出手段７が検出する外気温度Ｔａごとに定めた所定の温度Ｓｎを室外機制御装置１４で比較、さらに室外熱交換器過冷却管温度Ｔｅ２と外気温度Ｔａごとに定めた所定の設定値Ｒｎを同じく室外機制御装置１４で比較し（Ｓｔｅｐ４３）、Ｔｅ１≧Ｓｎ（ｎは１〜４のいずれか）、かつＴｅ２≧Ｒｎ（ｎは１〜４のいずれか）であれば電磁弁８をＯＦＦすなわち吐出ガスのバイパスを停止し（Ｓｔｅｐ４４）、さらに除霜運転を終了し暖房運転を再開する。
(Embodiment 5)
FIG. 6 is a flowchart for explaining an operation control method of the air-conditioning apparatus according to Embodiment 5 of the present invention. Table 1 shows set values of the outdoor heat exchanger temperature and the supercooling pipe temperature determined for each outdoor temperature. With the start of the defrosting operation, the solenoid valve 8 is turned on, that is, opened, and the discharge gas is caused to flow from the discharge gas pipe 13 to the inlet side pipe 11a of the supercooling pipe 11 (Step 41). The outdoor heat exchanger temperature detection means 6 detects the outdoor heat exchanger temperature Te1, the outdoor heat exchanger subcooling pipe temperature detection means 12 detects the outdoor heat exchanger subcooling pipe temperature Te2, and the outdoor air temperature detection means 7 The outdoor air temperature Ta is detected by (Step 42), the outdoor heat exchanger temperature Te1 and the predetermined temperature Sn determined for each outdoor air temperature Ta detected by the outdoor air temperature detecting means 7 are compared by the outdoor unit control device 14, and the outdoor heat exchange is further performed. A predetermined set value Rn determined for each of the subcooling pipe temperature Te2 and the outside air temperature Ta is similarly compared by the outdoor unit controller 14 (Step 43), Te1 ≧ Sn (n is any one of 1 to 4), and Te2 ≧ If it is Rn (n is any one of 1 to 4), the solenoid valve 8 is turned off, that is, the bypass of the discharge gas is stopped (Step 44), the defrosting operation is terminated, and the heating operation is restarted.
これらの動作により、室外熱交換器２及び室外熱交換器過冷却管１１において、外気温度に応じた最適な除霜終了判定を行いつつ、その間吐出ガスバイパスを開動作するので、次回暖房運転時に着氷するのを未然に防ぐことができ、除霜頻度も低減できる。 By these operations, in the outdoor heat exchanger 2 and the outdoor heat exchanger subcooling pipe 11, while performing the optimum defrosting end determination according to the outside air temperature, the discharge gas bypass is opened during that time. It is possible to prevent icing and to reduce the frequency of defrosting.
本発明の運転制御方法は、１対の室内機と室外機からなる空気調和装置に限定されるものではなく、複数の室内機と１台の室外機からなる多室型空気調和装置にも適用できる。 The operation control method of the present invention is not limited to an air conditioner composed of a pair of indoor units and outdoor units, but is also applied to a multi-room air conditioner composed of a plurality of indoor units and one outdoor unit. it can.
１ 能力可変型圧縮機
２ 室外熱交換器
３ 室外送風機
４ 室外機電動式膨張弁
５ 四方弁
６ 室外熱交換器温度検出手段
７ 外気温度検出手段
８ 電磁弁
９ キャピラリーチューブ
１０ 吐出ガスバイパス回路
１１ 過冷却管
１２ 過冷却管出口温度検出手段
１３ 吐出ガス管
１４ 室外機制御装置
１５ 室外機
１６ 室内熱交換器
１７ 室内送風機
１８ 室内機電動式膨張弁
１９ 室内機吸い込み空気温度検出手段
２０ 室内機制御装置
２１ 室内機
DESCRIPTION OF SYMBOLS 1 Capacitance variable compressor 2 Outdoor heat exchanger 3 Outdoor fan 4 Outdoor unit electric expansion valve 5 Four-way valve 6 Outdoor heat exchanger temperature detection means 7 Outside air temperature detection means 8 Solenoid valve 9 Capillary tube 10 Exhaust gas bypass circuit 11 Excess Cooling pipe 12 Supercooling pipe outlet temperature detection means 13 Discharge gas pipe 14 Outdoor unit control device 15 Outdoor unit 16 Indoor heat exchanger 17 Indoor blower 18 Indoor unit electric expansion valve 19 Indoor unit intake air temperature detection unit 20 Indoor unit control unit 21 Indoor unit
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| JP2006054553A JP4752541B2 (en) | 2006-03-01 | 2006-03-01 | Air conditioner |
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| JP5341622B2 (en) * | 2009-06-04 | 2013-11-13 | 日立アプライアンス株式会社 | Air conditioner |
| EP2645019B1 (en) * | 2010-11-24 | 2020-10-28 | Mitsubishi Electric Corporation | Heat pump hot-water supply device |
| JP2017101856A (en) * | 2015-11-30 | 2017-06-08 | ダイキン工業株式会社 | Freezing device |
| JP2017101858A (en) * | 2015-11-30 | 2017-06-08 | ダイキン工業株式会社 | Freezing device |
| JP2017101857A (en) * | 2015-11-30 | 2017-06-08 | ダイキン工業株式会社 | Freezing device |
| CN107160972B (en) * | 2017-06-19 | 2023-05-23 | 珠海格力电器股份有限公司 | Electric automobile, heat pump air conditioner assembly of electric automobile and control method of heat pump air conditioner assembly |
| JP2019086218A (en) * | 2017-11-07 | 2019-06-06 | ダイキン工業株式会社 | Refrigerant cycle device |
| WO2019106755A1 (en) * | 2017-11-29 | 2019-06-06 | 三菱電機株式会社 | Air conditioner |
| CN109631257B (en) * | 2018-12-14 | 2021-06-15 | 广东Tcl智能暖通设备有限公司 | Air conditioner and control method and control device thereof |
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| JPS62127467A (en) * | 1985-11-28 | 1987-06-09 | Toshiba Corp | Member deposited with ceramics and its production |
| JPH0721374B2 (en) * | 1986-01-08 | 1995-03-08 | 株式会社日立製作所 | Air conditioner equipped with refrigerant amount detection device |
| JPS62190359A (en) * | 1986-02-15 | 1987-08-20 | ダイキン工業株式会社 | Defrostation controller |
| JPH0255041A (en) * | 1988-08-19 | 1990-02-23 | Fuji Electric Co Ltd | Manufacture of inclined magnetic field coil for nuclear magnetic resonance device |
| JPH0626689A (en) * | 1992-07-10 | 1994-02-04 | Toshiba Corp | Multiple type air conditioner |
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