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a protection circuit

A technology for protecting circuits and circuits, applied in the electronic field, can solve problems such as loss of life and property safety, and achieve the effects of personal safety protection, stable performance, and simple circuit structure

Active Publication Date: 2018-11-27
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of using electricity, personal electric shock or fire accidents may be caused by defects or improper use of electrical equipment itself, which will bring huge losses to people's lives and property safety.

Method used

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] Please refer to figure 1 , is a connection schematic diagram of the first embodiment of the protection circuit of the present invention. In this embodiment, the circuit includes: a sensing module 1 , a comparing module 2 , and a switching module 3 .

[0024] The sensing module 1 is used to sense the instantaneous current in the live wire and the neutral wire of the power supply, and output a corresponding voltage signal when the instantaneous current in the ...

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Abstract

The embodiment of the invention discloses a protection circuit which comprises an induction module, a comparison module and a switching module. The induction module is used for inducting instantaneous currents in a live wire and a null wire of a power source, and corresponding voltage signals are output when the instantaneous currents in the live wire and the null wire are different. The comparison module is used for comparing voltages, related to the voltage signals, of reference voltages and outputting corresponding level signals. The switching module is connected with the comparison module, and used for receiving the level signals output by a comparator, and controlling connection and disconnection of the power source and a load access according to the level signals. Through the protection circuit, the power source and the load access can be automatically cut off in the electricity leakage process, and user safety is protected.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a protection circuit. Background technique [0002] With the continuous development of electronic technology, there are more and more electrical appliances. Some household electrical appliances such as electric lights, refrigerators, washing machines, microwave ovens, etc. have brought great convenience to people's lives. In addition to bringing convenience to people's life and entertainment, it can also help people greatly improve work efficiency. People's life is basically inseparable from electricity and various electrical appliances. But, along with the continuous improvement of people's living standards, the universal application of various electrical appliances makes the quantity of electrical appliances constantly increase. In the process of using electricity, personal electric shock or fire accidents may be caused by defects or improper use of electrical equipment itself, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/32
Inventor 周明杰王现中
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD