To reduce the noise generated when switching between a heating operation that does not allow refrigerant to flow through an evaporator and a dehumidifying heating operation that allows the refrigerant to flow through.SOLUTION: In vehicle air conditioners equipped with refrigeration cycles, a compressor 11, a first heat exchanger 2, a first inflator 12, a passenger compartment outdoor heat exchanger 4, a second inflator 14, and a second heat exchanger 3 are connected in this order in a loop. The connection is made via a first bypass flow path 16 provided with a first refrigerant control unit 15 between the first heat exchanger 2 and the first inflator 12 and between the passenger compartment outdoor heat exchanger 4 and the second inflator 14. A backflow blocking unit 13 is provided on the downstream side of the passenger compartment outdoor heat exchanger 4 between the passenger compartment outdoor heat exchanger and the merging portion with the first bypass flow path 16. The connection is made via a second bypass flow path 18 provided with the second refrigerant control unit 17 between the passenger compartment outdoor heat exchanger 4 and the backflow blocking unit 13 and between the second heat exchanger 3 and the compressor 11. The second expansion device 14 is closed to switch to the heating operation, and the second inflator 14 is closed to switch to the dehumidifying heating operation.SELECTED DRAWING: Figure 3
【課題】蒸発器に冷媒を通流させない暖房運転と通流させる除湿暖房運転との切り替え時に生じる騒音を低減する。【解決手段】圧縮機11、第1の熱交換器2、第1の膨張装置12、車室外熱交換器4、第2の膨張装置14、第2の熱交換器3をこの順でループ状に接続し、第1の熱交換器2と第1の膨張装置12との間と車室外熱交換器4と第2の膨張装置14との間を、第1の冷媒制御部15を備えた第1のバイパス流路16を介して接続し、車室外熱交換器4の下流側で第1のバイパス流路16との合流部位との間に逆流阻止部13を設け、車室外熱交換器4と逆流阻止部13との間と第2の熱交換器3と圧縮機11との間を、第2の冷媒制御部17を備えた第2のバイパス流路18を介して接続する冷凍サイクルを備えた車両用空調装置において、第2の膨張装置14を閉状態とすることで暖房運転に切り替え、第2の膨張装置14を絞り状態とすることで除湿暖房運転に切り替える。【選択図】 図3
VEHICLE AIR CONDITIONER AND OPERATION MODE SWITCHING CONTROL METHOD
車両用空調装置及び運転モード切替制御方法
2021-09-27
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 / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS |
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