Refrigerator air cooling synchronous controller circuit diagram

　　The circuit working principle of the device is shown in the figure. The experiment found that when the refrigerator compressor is working, taking air cooling measures for the refrigerator compressor and heat sink can not only protect the compressor, but also have a significant power saving effect. When the refrigerator motor M1 is started, the main circuit ① and ② of LSE are connected in series, and its ④ pin outputs a high level, the relay J is excited and attracted, and its normally open contacts j1-1 and j-2 are closed, connecting the power supply of the fan M2, and M2 works for air cooling. When M1 stops working, the ④ pin of LSE becomes a low level again, so J is automatically released and M2 stops working.