Frost -proof's air cooled heat pump

The utility model relates to a refrigeration air conditioner technical field, concretely relates to frost -proof's air cooled heat pump. This heat pump includes compressor, condenser, reservoir, expansion valve, confession liquid solenoid valve and the evaporimeter of connecting through pipeline annular, still includes main control board and the temperature sensor who installs at the evaporimeter,and between the pipeline of compressor mouth to condenser and supply parallelly connectedly between the pipeline of liquid solenoid valve to evaporimeter have a bistable state solenoid valve, the main control board is connected with the bistable state solenoid valve is electric with temperature sensor respectively. The utility model provides a frost -proof's air cooled heat pump simple structureis reasonable, not only can improve defrosting efficiency, can also improve the air cooled heat pump efficiency, reduces the energy consumption. Between the pipeline of compressor mouth to condenser and supply parallelly conne