Refrigeration cycle device

A refrigeration cycle device configured to perform air conditioning for a space to be air conditioned, the refrigeration cycle device comprising:

• a first refrigeration cycle which includes a first compressor, a first radiator, an air-conditioning expansion valve, an air-conditioning evaporator, a first expansion valve, and a first evaporator, and in which a first refrigerant circulates while evaporating in at least one of the air-conditioning evaporator or the first evaporator and radiating heat in the first radiator;
• a second refrigeration cycle which includes a second compressor, a second radiator, a second expansion valve, and a second evaporator, and in which a second refrigerant circulates while evaporating in the second evaporator and radiating heat in the second radiator;
• a heat transfer portion configured to switch a heat radiation destination from the first radiator between the second refrigerant in the second evaporator and outside air, and
• a controller configured to control the first refrigeration cycle, the second refrigeration cycle, and the heat transfer portion, wherein
• the air-conditioning evaporator is configured to cause the first refrigerant to absorb heat from ventilation air to be blown into the space as the first refrigerant evaporates,
• the first evaporator is configured to cause the first refrigerant to absorb heat from outside air as the first refrigerant evaporates,
• the second radiator is configured to radiate heat from the second refrigerant in the second radiator to the ventilation air,
• the heat transfer portion is made of a heat medium circuit in which a heat medium circulates,
• the heat medium circuit includes an outside air heat exchanger that exchanges heat between the heat medium and outside air, and a heating heat exchanger that exchanges heat between the heat medium and the ventilation air to heat the ventilation air,
• the first radiator is configured to radiate heat from the first refrigerant to the heat medium,
• the second evaporator is configured to evaporate the second refrigerant by causing the second refrigerant to absorb heat from the heat medium,
• the second radiator is a heat exchanger that causes the second refrigerant to radiate heat to the heat medium, and causes the second refrigerant to radiate heat to the ventilation air via the heat medium when the second refrigerant is made to radiate heat to the ventilation air,
• in a heating operation in which the space to be air conditioned is heated, the controller is configured (i) to set, in the heat medium circuit, a first circulation path through which the heat medium flows between the first radiator and the second evaporator, and a second circulation path in which the heat medium is prevented from flowing through the first circulation path and through which the heat medium flows between the second radiator and the heating heat exchanger, (ii) to cause the heat medium to circulate through the first circulation path and the second circulation path, (iii) to cause the first compressor and the second compressor to operate, and (iv) to allow the first refrigerant to flow from the first radiator to the first expansion valve and the first evaporator in the first refrigeration cycle, and
• in a cooling operation in which the space to be air conditioned is cooled, the controller is configured (i) to set, in the heat medium circuit, a third circulation path in which the heat medium is prevented from flowing through the heating heat exchanger and through which the heat medium flows between the first radiator and the outside air heat exchanger, (ii) to cause the heat medium to circulate through the third circulation path, (iii) to cause the first compressor to operate, and (iv) to allow the first refrigerant to flow from the first radiator to the air-conditioning expansion valve and the air-conditioning evaporator in the first refrigeration cycle.