Abutting circuit of water flow sensor

Abstract

The invention discloses a water flow sensor docking circuit. The leakage protector has a single-chip microcomputer output control, and also includes an isolation output control, a power input, a reverse isolation circuit, a charging current adjustment circuit, an optocoupler drive circuit, a pulse conversion circuit, a battery and a water flow sensor. ;The water flow sensor is electrically connected to the pulse conversion circuit, and the isolation output control is controlled by the optocoupler drive circuit; the output control of the single-chip microcomputer is controlled by the isolation output control; the optocoupler drive circuit is controlled by the pulse conversion circuit; power input, rectification and voltage stabilization circuit The reverse isolation isolation circuit and the charging current regulating circuit are connected in sequence, and the charging current regulating circuit supplies power for the battery, the pulse conversion circuit and the optocoupler driving circuit. When the water flow sensor of the present invention is working, the leakage protector will automatically trip for protection; otherwise, it will automatically power on and work, which has the ability to protect the water heater, making the use of the water heater safer.

Description

technical field [0001] The invention relates to the field of electrical safety, in particular to a water flow sensor docking circuit. Background technique [0002] The water heater leakage protector in the prior art lacks a water flow protection system, that is to say, when the water heater is in the heating state, the leakage protection plug is still in the working state, and if hot water is required in this state, the leakage protector is in passive protection In this mode, once a leakage current passes through the human body, the leakage protector will protect it. However, the electric shock intensity will be different due to the different environments and people’s physique, and the electric shock behavior cannot be avoided. The phenomenon has potential safety hazards. In order to solve the above-mentioned passive electric shock protection behavior, the present invention proposes: the water outlet power failure water flow sensor docking circuit, this circuit can realize t...

AI Technical Summary

Problems solved by technology

[0002] The water heater leakage protector in the prior art lacks a water flow protection system, that is to say, when the water heater is in the heating state, the leakage protection plug is still in the working state, and if hot water is required in this state, the leakage protector is in passive protection In this mode, once a leakage current passes through the human body, the leakage protector will protect it. However, the electric shock intensity will be different due to the different environments and people’s physique, and the electric shock behavior cannot be avoided. The phenomenon has potential safety hazards. In order to solve the above-mentioned passive electric shock protection behavior, the present invention proposes: the water outlet power failure water flow sensor docking circuit, this circuit can realize the water outlet power failure function, which is the water and electricity isolation control in the true sense. It completely solves the problem in use. Security risks!

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