Electric control system of refrigerator and refrigerator

The electric control system comprises an alternating current power supply end, a frequency conversion board and a main control board, the frequency conversion board is provided with an EMI filter circuit, a rectification filter circuit and an inverter circuit used for driving a compressor, the input end of the EMI filter circuit is connected with the alternating current power supply end, and the output end of the EMI filter circuit is connected with the main control board. The output end of the EMI filter circuit is connected with the input end of the rectification filter circuit, and the output end of the rectification filter circuit is connected with the inverter circuit; the main control board is provided with a load driving circuit for driving a load and a switching power supply circuit, the output end of the EMI filter circuit is further connected to the input end of the load driving circuit, and the output end of the rectification filter circuit is further connected to the input end of the switching power supply circuit; according to the technical scheme of the embodiment of the invention, the electronic control cost can be effectively saved, and electromagnetic interference can be effectively inhibited.