US 11,940,192 B2
Air conditioning device
Ryo Tsukiyama, Tokyo (JP); Satoru Yanachi, Tokyo (JP); So Nomoto, Tokyo (JP); Takuya Matsuda, Tokyo (JP); and Naoki Kato, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/281,008
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Dec. 18, 2018, PCT No. PCT/JP2018/046542
§ 371(c)(1), (2) Date Mar. 29, 2021,
PCT Pub. No. WO2020/129153, PCT Pub. Date Jun. 25, 2020.
Prior Publication US 2021/0341193 A1, Nov. 4, 2021
Int. Cl. F25B 47/02 (2006.01); F25B 7/00 (2006.01); F25B 41/20 (2021.01); F25B 41/31 (2021.01)
CPC F25B 47/02 (2013.01) [F25B 7/00 (2013.01); F25B 41/20 (2021.01); F25B 41/31 (2021.01); F25B 2500/09 (2013.01); F25B 2600/024 (2013.01); F25B 2600/13 (2013.01); F25B 2600/2515 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An air conditioning device, comprising:
a refrigerant circuit that is formed of a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger connected to one another by a first pipe through which a refrigerant flows, the refrigerant circuit being configured to perform a defrosting operation in which the refrigerant discharged from the compressor is introduced into the second heat exchanger;
a heat-transfer medium circuit that is formed of a pump, the first heat exchanger, and a third heat exchanger connected to one another by a second pipe through which a heat-transfer medium flows; and
a control device configured to
control the compressor and the pump,
perform the defrosting operation and at a same time keep heating, with a heating capability of the third heat exchanger during the defrosting operation set to a capability that is determined based on an amount of heat storage of the heat-transfer medium within the heat-transfer medium circuit, and
responsive to the air conditioning device transitioning from a heating operation to the defrosting operation and the amount of heat storage of the heat-transfer medium being less than a threshold maximum heat storage amount, reduce the heating capability of the third heat exchanger while the air conditioning device transitions from the heating operation to the defrosting operation.