Research on Performance of Air-source Heat Pump System Based on Large Refrigerant Flow Defrosting
In order to solve the problem of long defrosting time in reverse cycle defrosting method of air-source heat pump,a large refrigerant flow defrosting technology for air-source heat pump is proposed.It improves the throttling components of refrigerant circulation system by adding bypass flow path,which could increase the circulation flow of refrigerant.The defrosting performance and reliability of large flow defrosting system are studied by experiments.The results show that,compared with the traditional defrosting system,the defrosting time of large flow defrosting system can be shortened by about one-third,even in extreme environment,it can guarantee excellent defrosting effect.Thus,the influence of defrosting operation on heating performance can be reduced,and it shows the heating capacity and coefficient of performance are increased by 14.60%-32.44%and 2%-11.76%respectively.
Air-source heat pumpLarge flow defrostingCompressor discharge pressureCoefficient of performance
万方数据
维普
