HEAT PUMP DEVICE, AIR CONDITIONER, AND REFRIGERATING MACHINE

摘要

A heat pump device equipped with: a compressor (1) having a compression mechanism that compresses a refrigerant and a motor (8) that drives the compression mechanism; an inverter unit (9) that applies voltage for driving the motor (8); an inverter control unit (10) that generates a drive signal for driving the inverter (9); and temperature sensors (35a, 35b) that detect the temperature of the compressor (1). The inverter control unit (10) has a normal operation mode wherein the compressor (1) is operated normally, thereby compressing the refrigerant, and a heating operation mode wherein the compressor (1) is heated and operated by applying a high-frequency voltage to the motor (8). In the heating operation mode, the amplitude and phase of a voltage command for the purpose of generating the high-frequency voltage are determined on the basis of the temperatures detected by the temperature sensors (35a, 35b) and a predetermined required heating amount.