Self-resetting fireproof protection switch and protection method

A protection switch and self-resetting technology, which is applied in the direction of automatic disconnection emergency protection devices, emergency power protection, emergency protection circuit devices, etc., can solve problems such as failure to automatically reset, failure of the protection switch to work normally, troubles in production and life, etc.

Pending Publication Date: 2019-11-19
广东恒发电器科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] First, when the mains voltage is too low, there is not enough energy to drive the relay to turn on and off the mains, and the protection switch cannot work normally
[0004] Second, after the protection switch is powered off, when the fire arc is released, it cannot

Method used

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  • Self-resetting fireproof protection switch and protection method

Examples

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Embodiment Construction

[0022] Such as figure 1 As shown, a self-resetting fire protection switch includes a control chip, a relay, a full-bridge rectifier D2, a step-down circuit for stepping down the mains power, a power circuit for providing power to the control chip, and a leakage detection circuit for detecting leakage 1. A fire arc detection circuit for detecting the fire arc, a mains power detection synchronous circuit for detecting the mains power, a display circuit, an auxiliary circuit for the control chip, and a drive circuit for controlling the on-off of the relay, and the control chip is preferably a single-chip microcomputer.

[0023] The two input lines of the mains are the live line AC1-IN and the neutral line AC2-IN.

[0024] The mains power detection synchronous circuit includes a resistor R8 connected to the pin RA1 of the control chip, and the other end of the resistor R8 is connected to an input line of the mains power. In the embodiment, the input line is the live wire AC1-IN, a...

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PUM

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Abstract

The invention relates to a self-resetting fireproof protection switch. The self-resetting fireproof protection switch includes a control chip, a relay, a step-down circuit, a power supply circuit, a fire arc detection circuit, and a driving circuit; the fire arc detection circuit includes a transformer coil HQZ2; one input line of a mains supply passes through the transformer coil HGQ2; one end ofthe transformer coil HGQ2 is grounded; the other end of the transformer coil HGQ2 is connected to the pin of the control chip; and the step-down circuit includes a first resistance module, a second resistance module and an electronic switch module, wherein the first resistance module and the second resistance module are connected in series. The protection switch has a fireproof protection function and an automatic resetting function. The invention also discloses a corresponding fireproof protection method.

Description

technical field [0001] The invention relates to the technical field of protection switches, in particular to a self-resetting fire protection switch and a protection method. Background technique [0002] The current fire protection switches on the market have the following defects: [0003] First, when the mains voltage is too low, there is not enough energy to drive the relay to turn on and off the mains, and the protection switch cannot work normally. [0004] Second, after the protection switch is powered off, when the fire arc is released, it cannot be automatically reset, and manual reset is required. Often it is not reset in time, which will cause great troubles to production and life, such as refrigerators that need to be started 24 hours, industrial equipment The impact of downtime on production schedule, etc. [0005] Therefore, there is a need for improvement. Contents of the invention [0006] The object of the present invention is to address the above proble...

Claims

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Application Information

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IPC IPC(8): H02H5/00H02H1/06H02H3/00H02H3/04H02H3/06H02H3/32
CPCH02H1/06H02H3/00H02H3/044H02H3/066H02H3/32H02H5/00
Inventor 林汉通
Owner 广东恒发电器科技有限公司
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