Novel household electrical appliance electric shock protector

Abstract

The present invention discloses a novel household electrical appliance electric shock protector which comprises an AC signal detection circuit IC1. A first pin and a fourth pin of the AC signal detection circuit IC1 are connected to a source electrode S and a drain electrode D of a field effect transistor VF, and a gate G of the field effect transistor VF is connected to the source electrode S through a resistor R1. A third pin of the AC signal detection circuit IC1 is connected to a TR port of a voice generation circuit IC2 through a diode VD1. The novel household electrical appliance electric shock protector also comprises the voice generation circuit IC2 whose output port OUT is connected to an amplifying circuit IC3 through a coupling capacitor C2, and the amplifying circuit IC3 whose output end is connected to a buzzer Y through a capacitor C5. The protection circuit has high stability and resistance to interference, a purpose of preventing electric shock can be truly achieved, the response time of a protector is shortened, and the novel household electrical appliance electric shock protector has a fast response time and high sensitivity.

Description

technical field [0001] The invention relates to the technical field of electric shock protectors, in particular to a novel electric shock protector for household appliances. Background technique [0002] With the promotion of the use of electric shock protectors and the improvement of people's living standards, household appliances and other equipment have increased, and household appliances generally have inductive loads and capacitive loads. The ability of electric shock protectors to resist interference such as surge voltage and inrush current is getting stronger and stronger, so that leakage circuit breakers can be used reliably in various situations, and ensure that electric shock protectors do not have false trips and failures. [0003] Traditional electric shock protectors use surge current protection and overload protection circuits, and electrical appliances generally use NTC thermistors to achieve soft start, but their disadvantages are that the load consumes a lot...

AI Technical Summary

Problems solved by technology

[0003] Traditional electric shock protectors use surge current protection and overload protection circuits, and electrical appliances generally use NTC thermistors to achieve soft start, but their disadvantages are that the load consumes a lot of power, the power utilization rate is not high, and the circuit uses NTC thermal The sensitive resistance is used as the driving force for starting, which makes the delay time of the setting value of the operating current longer, the response is not sensitive enough, and it is easy to cause the phenomenon that the electric shock protector does not respond

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