A refrigeration cycle device wherein, in an operation mode in which a refrigerant is made to flow to an indoor evaporator (16) and blown air is cooled by the indoor evaporator, the throttle opening characteristic of an expansion valve (15a) for cooling that is configured from a mechanical mechanism is set such that the refrigerant at the outlet side of the indoor evaporator is in a gas-phase state. In an operation mode in which blown air is heated by using as a heat source heat absorbed from outside air by an outdoor evaporator (18), the throttle opening characteristic of a valve (15b) for heat absorption that is configured from a mechanical mechanism is set such that the refrigerant at the outlet side of the outdoor evaporator is in a gas-liquid two-phase state. Thus, in the operation mode in which the blown air is heated, it is possible to suppress the accumulation of refrigerant oil in the outdoor evaporator. Furthermore, the state of the refrigerant flowing from the evaporators canbe adjusted appropriately in accordance with the operation mode without increasing the complexity of the cycle configuration.
在制冷循环装置中,在使制冷剂流入到室内蒸发器(16)并由室内蒸发器对送风空气进行冷却的运转模式下,预先设定由机械机构构成的冷却用膨胀阀(15a)的节流开度特性,以使室内蒸发器的出口侧的制冷剂成为气相状态。在将由室外蒸发器(18)从外气吸热的热作为热源来对送风空气进行加热的运转模式下,预先设定由机械机构构成的吸热用膨胀阀(15b)的节流开度特性,以使室外蒸发器的出口侧的制冷剂成为气液二相状态。由此,在对送风空气进行加热的运转模式下,抑制冷冻机油滞留在室外蒸发器内的情形发生。能够在不导致循环结构复杂化的情况下根据运转模式适当地调整从蒸发器流出的制冷剂的状态。
REFRIGERATION CYCLE
制冷循环装置
2020-04-24
Patent
Electronic Resource
Chinese
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 |