To inhibit a liquid refrigerant from remaining in a second condenser when a first circulation circuit where a refrigerant is condensed in a second condenser is changed to a second circulation circuit where the refrigerant is not condensed in the second condenser.SOLUTION: A refrigeration circuit system includes a compressor 11 that compresses and discharges a refrigerant, a first condenser 12 and second condenser 15 each of which exchanges heat energy with the refrigerant and thus condenses the refrigerant, an evaporator 20 that exchanges heat energy with the refrigerant and thus evaporates the refrigerant, a first expansion valve 14 that depressurizes and expands the refrigerant which flows into the second condenser, a second expansion valve 19 that depressurizes and expands the refrigerant which flows into the evaporator, refrigerant route changers 17 and 23 that change a first circulation route along which the refrigerant circulates orderly from the compressor through the first condenser, first expansion valve, second condenser, second expansion valve, and evaporator to the compressor, and a second circulation route along which the refrigerant circulates orderly from the compressor through the first condenser, second expansion valve, and evaporator to the, compressor, and a control unit 40 that implements dryness boost control of boosting the dryness of the refrigerant in the second condenser when the first circulation route is changed to the second circulation route.SELECTED DRAWING: Figure 3
【課題】第2凝縮器で冷媒を凝縮させる第1循環回路から、第2凝縮器で冷媒を凝縮させない第2循環回路への切り替え時に、第2凝縮器に液冷媒が残留することを抑制する。【解決手段】冷媒を圧縮して吐出する圧縮機11と、冷媒を熱交換させて凝縮させる第1凝縮器12および第2凝縮器15と、冷媒を熱交換させて冷媒を蒸発させる蒸発器20と、第2凝縮器へ流入する冷媒を減圧膨張させる第1膨張弁14と、蒸発器へ流入する冷媒を減圧膨張させる第2膨張弁19と、圧縮機、第1凝縮器、第1膨張弁、第2凝縮器、第2膨張弁、蒸発器、圧縮機の順に冷媒が循環する第1循環経路と、圧縮機、第1凝縮器、第2膨張弁、蒸発器、圧縮機の順に冷媒が循環する第2循環経路とを切り替える冷媒経路切替部17、23と、第1循環経路から第2循環経路へ切り替わる際に第2凝縮器内の冷媒の乾き度を上昇させる乾き度上昇制御を行う制御部40とを備える。【選択図】図3
REFRIGERATION CYCLE SYSTEM
冷凍サイクル装置
02.04.2025
Patent
Elektronische Ressource
Japanisch
IPC: | F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |
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