VEHICLE-MOUNTED TEMPERATURE CONTROLLER

A vehicle-mounted temperature controller provided with a compressor having a compression part compressing a refrigerant and a drive motor driving the compression part and using waste heat accompanying driving of the compression part to make the temperature of the refrigerant rise, a blower blowing air to a heater core raised in temperature by receiving heat of the refrigerant and blowing air exchanged in heat with the heater core to the inside of the passenger compartment, and an electronic control unit controlling a current phase of the drive motor to a phase by which a ratio of change of an output of the drive motor to a change of the current phase becomes relatively larger to thereby drive the drive motor by an inefficient drive operation when the blower is in a nondriven state and controlling the current phase to a phase by which a ratio of change of an output of the drive motor to a change of the current phase becomes relatively smaller to thereby drive the drive motor by an inefficiently drive operation when the blower is in a driven state.