US 12,146,676 B2
Control method and device for increasing amount of circulating refrigerant and air conditioner
Jianmin Guo, Guangdong (CN); Shiqiang Zhang, Guangdong (CN); and Huachao Jiao, Guangdong (CN)
Assigned to Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
Appl. No. 17/786,068
Filed by Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
PCT Filed Nov. 25, 2020, PCT No. PCT/CN2020/131361
§ 371(c)(1), (2) Date Jun. 16, 2022,
PCT Pub. No. WO2021/174915, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 202010144518.8 (CN), filed on Mar. 4, 2020.
Prior Publication US 2023/0023942 A1, Jan. 26, 2023
Int. Cl. F24F 11/871 (2018.01); F24F 11/38 (2018.01); F24F 11/64 (2018.01); F24F 11/77 (2018.01); F24F 11/84 (2018.01); F24F 11/88 (2018.01); F25B 49/02 (2006.01)
CPC F24F 11/871 (2018.01) [F24F 11/38 (2018.01); F24F 11/64 (2018.01); F24F 11/77 (2018.01); F24F 11/84 (2018.01); F24F 11/88 (2018.01); F25B 49/02 (2013.01); F25B 2500/08 (2013.01); F25B 2600/11 (2013.01); F25B 2700/21152 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A control method for increasing amount of circulating refrigerant, comprising:
determining whether an exhaust temperature of a compressor of an air-conditioning system is greater than a preset safety alert value, in a case where a demand for a cooling capacity is equivalent to a demand for a heating capacity during operation of an air-conditioning system and an outdoor heat exchanger of the air-conditioning system is in non-working state;
adjusting a frequency of a fan of the outdoor heat exchanger, in a case where the exhaust temperature of the compressor is greater than the preset safety alert value to increase so that refrigerant stored in the outdoor heat exchanger is discharged into a refrigerant circulation system of the air-conditioning system; and
controlling to stop adjusting the frequency of the fan and maintaining the air-conditioning system in operation at an adjusted current frequency of the fan, in a case where the exhaust temperature of the compressor is not greater than the preset safety alert value,
wherein the air-conditioning system is a multi-split heat recovery system.