US 11,988,419 B2
Refrigeration cycle apparatus
Hiroki Ishiyama, Tokyo (JP); and Yusuke Shimazu, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/430,764
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Apr. 5, 2019, PCT No. PCT/JP2019/015152
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/202555, PCT Pub. Date Oct. 8, 2020.
Prior Publication US 2022/0154981 A1, May 19, 2022
Int. Cl. F25B 31/00 (2006.01)
CPC F25B 31/002 (2013.01) 10 Claims
OG exemplary drawing
 
1. A refrigeration cycle apparatus comprising:
a refrigerant circuit including a compressor, a high-pressure side heat exchanger, a decompressor, and a low-pressure side heat exchanger, which are annularly connected by a refrigerant pipe, the refrigerant circuit being configured to circulate refrigerant;
a controller; and
a sensor configured to detect an amount of oil in the compressor,
the controller is configured to control the refrigerant circuit so as to perform an oil recovery operation based on a total operation time or a number of start/stop times of the compressor during a normal operation of the refrigerant circuit and the amount of oil in the compressor.