Vehicle air-conditioning device

A vehicle air-conditioning device comprising:

• a compressor to compress a refrigerant;
• an air flow passage through which air to be supplied to a vehicle interior flows;
• a radiator to let the refrigerant radiate heat, thereby heating the air to be supplied from the air flow passage to the vehicle interior;
• a heat absorber to let the refrigerant absorb heat, thereby cooling the air to be supplied from the air flow passage to the vehicle interior;
• an outdoor heat exchanger provided outside the vehicle interior;
• an outdoor expansion valve to decompress the refrigerant flowing out from the radiator and flowing into the outdoor heat exchanger;
• a first opening/closing valve provided between a discharge side of the compressor and an inlet side of the radiator;
• a bypass pipe to branch on an upstream side of the first opening/closing valve to bypass the radiator and the outdoor expansion valve, thereby letting the refrigerant discharged from the compressor flow into the outdoor heat exchanger;
• a second opening/closing valve provided in the bypass pipe;
• and
• a control device,
• wherein the control device executes at least an operation mode to fully close the outdoor expansion valve, close the first opening/closing valve, and open the second opening/closing valve to thereby let the refrigerant discharged from the compressor flow into the outdoor heat exchanger by the bypass pipe and radiate heat, decompress the refrigerant from which the heat has been radiated, and then let the refrigerant absorb heat in the heat absorber,
• wherein during stopping of operation, the first opening/closing valve is opened and the second opening/closing valve is closed, and
• wherein when the operation is stopped from a state in which the compressor is operating in the operation mode, the control device maintains the first opening/closing valve in a closed state and the second opening/closing valve in an opened state even after the compressor is stopped.