Double row arc heat exchanger has large heat exchange area and high refrigeration and heating efficiency. Built-in 900W heating power of electric auxiliary heat, both large refrigeration capacity and high calorific capacity, using an area of refrigeration 16-21 square meters, heating 18-23 square meters, intermediate refrigeration capacity 1700W, intermediate heat 2200W, low-temperature heat 3840W.High efficiency rare earth DC frequency converter compressor, 1.5 pieces, has a wide operating frequency range, can maintain stable output under a variety of temperature conditions, reduce energy consumption, energy consumption level of three. There is an injection moulding anti-mildew and bacteriostasis filter, which can be washed.