Air conditioning device for vehicle

A vehicle air-conditioning apparatus comprising:

• a refrigerant circuit including:
• a compressor configured to compress a refrigerant;
• a heating unit configured to heat blowing air to be blown into an air-conditioning target space;
• an outdoor heat exchanger configured to cause the refrigerant to absorb heat;
• a first electronic expansion valve provided on a refrigerant inlet side of the outdoor heat exchanger;
• a temperature control target heat exchanger;
• and a second electronic expansion valve provided on a refrigerant inlet side of the temperature control target heat exchanger;
• a device temperature adjustment circuit connected to the refrigerant circuit via the temperature control target heat exchanger and configured to cause the temperature control target heat exchanger to adjust a temperature of a temperature control target mounted on a vehicle;
• and
• a control device configured to control the refrigerant circuit and the device temperature adjustment circuit, wherein
• in a heating operation for heating the interior of the vehicle by use of the heating unit, the control device is programmed to perform:
• an outside air heat absorption heating mode in which the refrigerant that has been discharged from the compressor and has dissipated heat in the heating unit absorbs heat in the outdoor heat exchanger, and
• a combined heating mode in which the refrigerant that has been discharged from the compressor and has dissipated heat in the heating unit absorbs heat in the outdoor heat exchanger and the temperature control target heat exchanger, and
• upon switching from the combined heating mode to the outside air heat absorption heating mode, the control device is programmed to increase a degree of opening of the first electronic expansion valve to a given degree of opening, maintain the given degree of opening for a given period of time, and fully close the second electronic expansion valve within the given period of time.