Working principle diagram of hydraulic control circuit

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The working principle of the device application circuit of the hydraulic control circuit is shown in the figure. It can be used for automatic water supply in household tap water. Nowadays, urban water is relatively tight. It is more difficult for residents in high-rise buildings to use water. It is often only in the middle of the night that others do not use water, and only a small amount of water is pressed into the tall buildings, but people want Sleeping, can't always wait for irrigation, use this circuit to rest assured to sleep. When the water level in the pool is lower than the probe B, a current flows from the 1 end of the controller DM through the resistor R to the 4 end, the controller is turned on, the solenoid valve YA is energized, and the faucet is turned on. When water is pressed in, it automatically flows into the pool. Once the water pollution is sufficient, when the water surface reaches the height of the probe B, the resistance between the B and A probes and the R partial pressure make the voltage of the controller 4 terminal lower than 1.6V, so the YA loses electricity and the faucet automatically shuts off. . So when I got up the next morning, I didn’t use water. The A and B probes can be made of stainless steel.