To suppress occurrence of frosting and freezing odor of an evaporator at the time of heating mode.SOLUTION: A heat pump cycle device which is applied for an air conditioner for vehicle and of which an operation mode can be changed between a cooling mode and a heating mode. When a coolant pressure in a low-pressure passage 106, in which a low-pressure coolant, of which a pressure is so made as to be lower than that of a coolant which is pressure-reduced by an expansion valve 15 for heating and is discharged from a compressor 12 at the time of heating mode, flows toward the compressor 12, is lower than a coolant pressure in an evaporator front passage 107 between a valve body of a three-way valve 26 and a coolant inlet of an evaporator 22, the three-way valve 26 communicates the evaporator front passage 107 and the low-pressure passage 106 with each other without via the evaporator 22.SELECTED DRAWING: Figure 10
【課題】加熱モード時における蒸発器のフロストや凍結臭の発生を抑制する。【解決手段】車両用空調装置に適用され、運転モードを冷房モードと暖房モードとに切り換えることができるヒートポンプサイクル装置であって、暖房モード時において、暖房用膨張弁15で減圧されて圧縮機12から吐出された冷媒よりも低圧とされた低圧冷媒が圧縮機12に向かって流れる低圧流路106の冷媒圧力が、三方弁26の弁体と蒸発器22の冷媒入口との間の蒸発器前流路107の冷媒圧力よりも低いときに、三方弁26は、蒸発器22を介さずに、蒸発器前流路107を低圧流路106に連通させている。【選択図】図10
HEAT PUMP CYCLE DEVICE AND VALVE GEAR
ヒートポンプサイクル装置および弁装置
2019-02-21
Patent
Electronic Resource
Japanese
IPC: | 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 / F16K VALVES , Ventile / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS |