HEAT PUMP DEVICE, AND AIR CONDITIONER, HEAT PUMP/HOT-WATER SUPPLY MACHINE, REFRIGERATOR, AND FREEZER EQUIPPED WITH SAME

摘要

A heat pump device surely prevents a coolant from being held up in a compressor and attains a reduction in standby power, by efficiently carrying out heating to the compressor according to a necessary heating amount. An air conditioner, a heat pump water heater, a refrigerator, and a freezing machine including the heat pump device are provided. An inverter control unit 10 includes a constraint-energization control unit 12 that, during operation standby of the compressor 1, determines whether heating to the compressor 1 is necessary, on the basis of a coolant sleeping amount in the compressor 1, and, when having determined that heating to the compressor 1 is necessary, selects, according to the coolant sleeping amount, any one of direct-current energization for supplying a direct-current voltage to the motor 8 and high-frequency energization for supplying a high-frequency voltage having a frequency higher than a frequency during a normal operation to the motor 8, so as to output a constraint energization command for carrying out constraint energization of the motor; and a driving-signal generating unit 13 that generates a driving signal on the basis of the constraint energization command.