Air source heat pump

as an important heating and air-conditioning equipment

is widely used in various types of buildings in China.The different climate and building load characteristics within different zones create a gap between the demand for coolingand heatingbecause China is a large country with several climate zones. Therefore

providing different air source heat source products for different zones becomes an important measure toward promoting the orderly and healthy development of air source heat pump technology and industry. Based on the air source heat pump characteristics

China’s climate and load characteristics

and development of Chinese and internationalstandards on air source heat pump

this study expounded the necessity of designing different air source heat pumps in different zones and proposed a corresponding plan. It is suggested that the heating performance of air source heat pumps in different climate zones in China should be designed with different outdoor heating conditions

i.e.

nominalheating design conditions; nonetheless

the cooling performance can be determined by a uniform condition. On this basis

the nominal outdoor heating and cooling conditions

nominal heating/cooling ratio

and theoretical compression ratio and displacement of the air source heat pumps for different zones

as well as the development of the air source heat pumpwere analyzedin this study.