The induction faucet is based on the principle of infrared reflection. When the human hand is placed in the infrared area of the faucet, the infrared radiation announced by the infrared emission tube is reflected to the infrared receiving tube due to the shielding of the human hand. After being processed by the microcomputer in the integrated circuit, the signal is sent to the pulse electromagnetic valve. After receiving the signal, the electromagnetic valve opens the valve core according to the specified instruction to control the faucet to discharge water; When the human hand is detached from the infrared sensing scale, the electromagnetic valve does not receive a signal, and the valve core of the electromagnetic valve is reset through an internal tension spring to control the water turning off of the faucet.

The principle of electromagnetic induction: When a person is regarded as a conductor and is exposed to a magnetic field composed of 50Hz alternating current, electromagnetic induction occurs. Therefore, the human body induces current, which in turn affects the original electromagnetic field and alters the original current. When this modification is accepted by the circuit in the future, water will be discharged through an electromagnetic relay. The infrared radiation receives a human body temperature of 37 degrees. When it is above room temperature, it will radiate infrared radiation outward. The sensor that receives this radiation will cause the faucet to run water. The infrared reflection infrared emitting tube emits a beam of infrared light in the direction of water flow. When the hand extends towards the faucet, the infrared light is reflected by the hand, and the infrared receiving tube receives the infrared light and sends the signal to the internal circuit. After processing by the internal circuit, the power of the electromagnetic faucet is turned on, and the faucet is turned on; When the hand is detached from the faucet, the infrared rays are no longer reflected, and the power supply of the electromagnetic faucet is blocked, interrupting the water supply.

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