VALVE OPENING CIRCUIT AND HEAT PUMP DEVICE

A valve opening circuit 5 mounted on a heat pump device having a valve on a refrigerant circuit includes a DC electric path 56 to which a DC voltage generated from an AC voltage for normal use is applied, a valve drive circuit 53 that opens and closes the valve by using the DC voltage of the DC electric path 56, a control unit 54 that acquires a control power source voltage based on the DC voltage of the DC electric path 56 and controls the valve drive circuit 53, and a power feed port 7 connected to the DC electric path 56 and connectable to a DC power source line 9 provided from outside for emergency. The control unit 54 causes the valve drive circuit 53 to open the valve when the AC voltage is lost and the DC voltage is fed from the DC power source line 9 to the power feed port 7.