US 12,467,670 B2
Heat pump device
Yuusuke Fujimoto, Osaka (JP); Ryuuichi Toyota, Osaka (JP); Kentaroh Taoka, Osaka (JP); Atsushi Ohtani, Osaka (JP); Kevin Cornelis, Ostend (BE); and David Steen, Ostend (BE)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP); and DAIKIN EUROPE N.V., Ostend (BE)
Appl. No. 17/761,700
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP); and DAIKIN EUROPE N.V., Ostend (BE)
PCT Filed Sep. 8, 2020, PCT No. PCT/JP2020/033967
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2021/054199, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 2019-170547 (JP), filed on Sep. 19, 2019; and application No. 2020-084423 (JP), filed on May 13, 2020.
Prior Publication US 2022/0390160 A1, Dec. 8, 2022
Int. Cl. H02J 7/34 (2006.01); F25B 30/02 (2006.01); F25B 41/37 (2021.01); F25B 49/02 (2006.01)
CPC F25B 49/02 (2013.01) [F25B 30/02 (2013.01); F25B 41/37 (2021.01); F25B 2500/222 (2013.01); F25B 2600/2521 (2013.01); F25B 2700/15 (2013.01)] 15 Claims
OG exemplary drawing
 
1. 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.