Self-resetting fireproof protection switch and protection method

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...

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 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 progress, etc.

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