Abstract：

Traditional heat pumps usually can not work efficiently all year round and the performance during the defrosting period is not good enough. After analysing the existing problems in the application of heat pump, proposes a novel heat pump system with high efficiency for the whole year, i.e., flexible heat pump system. Elaborates the working principles and characteristics of three typical flexible heat pump systems in detail. It is shown that the flexible heat pump not only can solve a series of problems of traditional airsource heat pumps, groundsource heat pumps and solar energy collectors, but also has huge potential of energy conservation.

Keywords:airsourceheatpump,groundsourceheatpump,solarenergycollector,heating,lowgradenaturalresource