Protection circuit and method for intelligently eliminating impact of UV lamp

Abstract

The invention provides a protection circuit for intelligently eliminating an impact of an UV lamp. The protection circuit comprises an MCU controller, a zero-cross detection module, a safety voltage detection module and an electronic switch, wherein the zero-cross detection module detects an approximate zero potential point of an AC power supply phase voltage of the UV lamp; the safety voltage detection module detects and outputs a safety voltage of a capacitor voltage of the UV lamp; the electronic switch is connected to an AC power supply loop of the UV lamp in series; and the MCU controller inputs a zero-cross detection signal of the zero-cross detection module and a safety voltage detection signal of the safety voltage detection module, and outputs a control signal according to the zero-cross detection signal and the safety voltage detection signal to control on or off of the electronic switch. The invention further provides a method for intelligently eliminating the impact of the UV lamp. The problem of the impact on an electronic component caused by a high current generated when the UV lamp is turned on can be fundamentally solved.

Description

technical field [0001] The invention relates to a protection circuit and a method for intelligently eliminating the impact of UV lamps. Background technique [0002] With the continuous improvement of people's living standards and the increasing enrichment of material and cultural life, there is a wide demand for products with UV lamps. However, in terms of application technology, the impact of overcurrent generated by UV lamp startup on electronic switch components has never been affected. It has been fundamentally solved, which has seriously affected the market development of UV lamps. [0003] The UV lamp is the ultraviolet disinfection lamp. The impact of the UV lamp is the impact of overcurrent when the UV lamp is turned on. The current value at this time is 6-10 times the normal working rating. If the electronic switch components are connected or disconnected, there will be serious arcing phenomenon, which will cause the melting of the electronic switch contacts or af...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a protective circuit and method for intelligently eliminating the impact of UV lamps, which can fundamentally solve the problem of impacts on electronic switch components caused by large currents when UV lamps are started.

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