Disclosed are an efficient electric defrost device for a refrigerator, and a method thereof, belonging to the defrost field. In the device, a compressor, an oil separator, a condenser, a filter and a regenerator are connected in sequence through
pipe flanges, and the regenerator is then connected with the compressor through a
pipe flange; the regenerator, a
solenoid valve, an expansion valve and a coil
pipe are connected through pipe thread; the coil pipe is connected with a gas collecting pipe through
welding; the gas collecting pipe is connected with the regenerator through a pipe
flange; the gas collecting pipe is bound with a temperature controller; fins are inserted in the coil pipe and an
electric heating pipe; a return
air door is arranged on an
enclosure box; a blower, the coil pipe, the fins, the
electric heating pipe, the gas collecting pipe, the temperature controller and a temperature
bulb B are arranged inside the
enclosure box which is connected with a
water discharge pipe through thread; and the
electric heating pipe, the temperature controller, a controller, a protector and the
solenoid valve are electrically connected. The method comprises the following steps: the device jumps off at 8 DEG C and gets resetted at 3 DEG C; the
solenoid valve is closed in the
refrigeration and defrost
delay time, then the blower stops, while the compressor and the condenser start to work; the
refrigerant enters into the condenser for
cold storage; the return
air door is closed; the electric heating pipe is electrified for
defrosting in a set defrost time; the
water discharge time is set; and the return
air door is opened for
refrigeration. The device is used for
defrosting, which is energy-saving and highly efficient.