Research on Two-stage Rotary Compressor with Refrigerant Injection for Cold Climate Heat Pump

Conference Year

2018

Authors

Yusheng Hu, Gree Electric Appliances,Inc. of Zhuhai, China, People's Republic of;State Key Laboratory of Air-conditioning Equipment and System Energy Conservation, ChinaFollow
Huifang Luo, Gree Electric Appliances, Inc. of Zhuhai, China, People's Republic ofFollow
Jian Wu, State Key Laboratory of Air-conditioning Equipment and System Energy Conservation, ChinaFollow
Huijun Wei, State Key Laboratory of Air-conditioning Equipment and System Energy Conservation, ChinaFollow
Ouxiang Yang, State Key Laboratory of Air-conditioning Equipment and System Energy Conservation, ChinaFollow

Keywords

Two-stage Rotary Compressor, Refrigerant Injection, Cold Climate Heat Pump

Abstract

As an promising heating application of environmental conservation and energy conservation, air-source heat pump systems has been spreading. However, conventional heat pump systems have problems remaining, such as inadequate heating capacity and reduced performance under low environmental temperature condition. To solve these problems, we developed a two-stage rotary compressor for household R32 air-source heat pump system. We analyzed the thermodynamic characteristics of two-stage rotary compressor with refrigerant injection used in heat pump system with economizer. It is found that the two-stage rotary compressor can enhance heating capacity and performance of R32 heat pump under cold climate markedly.