IN-VEHICLE TEMPERATURE ADJUSTING DEVICE, VEHICLE AIR-CONDITIONING DEVICE, AND BATTERY TEMPERATURE ADJSUTING DEVICE

A vehicle-mounted temperature adjustment device included in a vehicle air-conditioning device includes a low-water-temperature circuit through which low-water-temperature cooling water circulates. In addition, the vehicle-mounted temperature adjustment device has a compressor, a condenser, a subcooling condenser, an expansion valve, which is one example of a first expansion unit, an expansion valve, which is one example of a second expansion unit, and an evaporator and refrigerant-water heat exchanger, and includes a refrigeration circuit that performs temperature adjustment of a temperature-adjustment target. The low-water-temperature circuit has a sub-radiator that releases heat of the low-water-temperature cooling water that has been subjected to heat exchange with refrigerant at the subcooling condenser.