Air conditioner and air energy water heater anti-frosting device

The utility model relates to an air conditioner host accessory, in particular to an air conditioner and air energy water heater anti-frosting device. The air conditioner and air energy water heater anti-frosting device comprises a closed metal container, a main pipeline, a first branch pipe and a second branch pipe; the main pipeline penetrates through the metal container from top to bottom; a first solenoid valve is installed on the lower portion of the main pipeline; the outer end of the first branch pipe is fixedly connected to the main pipeline; the inner end of the first branch pipe stretches into the metal container from the bottom; the pipe orifice of the inner end of the first branch pipe is close to the bottom of an inner cavity of the metal container; the outer end of the second branch pipe is fixedly connected to the main pipeline; the inner end of the second branch pipe stretches into the metal container from the bottom; the pipe orifice of the inner end of the second branch pipe is close to the top of the inner cavity of the metal container; a second solenoid valve is installed on the first branch pipe; a one-way valve is installed on the second branch pipe. The air conditioner and air energy water heater anti-frosting device is assembled in a host of an air conditioner or an air energy water heater and connected between a throttle and an evaporator, frosting of the evaporator is prevented fundamentally, energy consumption of the air conditioner and the air energy water heater is reduced, and the use cost is lowered.