Heat pump device

A heat pump device including a refrigerant circuit, the heat pump device comprising:

• a valve provided on the refrigerant circuit and configured to maintain an opening degree during non-energization;
• a valve drive circuit configured to cause operation of the valve;
• a valve controller configured to control the valve drive circuit;
• and
• a power source circuit configured to supply a power source to the valve drive circuit,
• wherein the power source circuit includes:
• a first power source circuit unit including a first output electric path and configured to receive power source supply from outside to generate a direct current voltage;
• and
• a second power source circuit unit for backup configured to receive power source supply from the outside to store power in a capacitor, and connect the capacitor in parallel to the first output electric path, wherein
• the refrigerant circuit includes a gas-side refrigerant pipe and a liquid-side refrigerant pipe,
• the valve includes a valve on a gas side provided in the gas-side refrigerant pipe and a valve on a liquid side provided in the liquid-side refrigerant pipe,
• the capacitor has a capacity to store an amount of electricity required to fully close each of the valves from fully open, and
• the valve controller causes each of the valves to perform a close operation in order from any one of the valves.