Overall refrigerating unit of refrigerator

An overall refrigerating unit of a refrigerator is formed by connecting a compressor, a condenser and an evaporator through pipelines, and further comprises a rack, a heat preservation cover, an evaporation fan and a control circuit. The compressor, the condenser, the evaporator and the heat preservation cover are all connected to the rack, a heat preservation cavity is formed between the heat preservation cover and the rack, the evaporator is located in the heat preservation cavity, the rack is provided with an air outlet communicated with the heat preservation cavity, the evaporation fan is arranged at the air outlet of the rack, the heat preservation cover is provided with a through hole allowing the pipelines to pass, a defrosting electric heating pipe is arranged at the position, at the bottom of the evaporator, in the heat preservation cavity, a condensation fan is arranged beside the condenser, a temperature sensor is arranged on the condenser, and the defrosting electric heating pipe, the condensation fan and the temperature sensor are all electrically connected with the control circuit. The overall refrigerating unit is reasonable in structure, small in size, high in refrigerating efficiency, convenient to mount and maintain, low in after-sale maintenance cost and fast in cooling of the condenser, has the functions of automatically defrosting the evaporator and automatically evaporating condensation water, and can be suitable for refrigerating of the refrigerator better.