The circuit operation principle of the device is shown in the following figure. The experiment found that when the compressor of the refrigerator is working, the compressor and the heat sink of the refrigerator are subjected to air-cooling measures, which not only protects the compressor, but also has obvious power saving effect. When the refrigerator motor M1 is started, the main circuit 1 and 2 of the LSE are connected in series, the 4th pin outputs a high level, the relay J is energized, and the normally open contacts j1-1, j-2 are closed and connected. The power of the fan M2, M2 works for air cooling. When M1 stops working, the 4 feet of the LSE turn low again, so J is automatically released and M2 stops working.
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Principle of light-controlled street lamp circuit based on I series load sensor
The circuit operation of the device is shown in Figure 12. During the daytime, when there is strong light on the photoresistor RG, the internal resistance of RG is very small, which is equivalent to the LSE's pinch between pin 1 and pin 2. At this time, the LSE pin 4 outputs a high level, the triode VT is cut off, and the relay J Release, street light H has no power to go out. Once night falls, the outside light is weak, and the internal resistance of RG rises, which is equivalent to the blocking of pins 1 and 2 of the LSE. Therefore, the 4 feet of the LSE become high level, the triode VT is turned on, the J excitation is closed, and the normally open The contacts j1-1, j1-2 are closed, and the illumination lamp H is powered and illuminated.
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