An integrated control switch for controlling a solenoid valve linked with a gas detector

Abstract

The invention relates to an acousto-optic integrated independent wireless gas detector system and an integrated control switch for controlling a solenoid valve linked with the gas detector, which mainly includes a first light emitting diode D1, a second light emitting diode D2, The third light-emitting diode D3, the first switch SW1, the second switch SW2, the third switch SW3, the zero-crossing detection circuit ZC, the first rectification and filtering circuit DC1, the second finishing and filtering circuit DC2, the first driving part DM1, the second driving Part DM2, first shield SH1, second shield SH2, first permanent magnet PM1, second permanent magnet PM2, first mesh plate MS1, second mesh plate MS2, third mesh plate MS3, fourth mesh plate Mesh plate MS4, notch, slider, square block, groove, support.

Description

technical field [0001] The invention relates to an acousto-optic integrated stand-alone wireless gas detector system, and more particularly relates to an integrated control switch for controlling a solenoid valve linked with the gas detector. Background technique [0002] The wireless gas detector is connected to the control host through a wireless signal, the detector signal is transmitted to the control host, and the control host then feeds back the signal to the solenoid valve, and the linkage solenoid valve cuts off the gas source. [0003] The switch circuit of the AC 220V power supply solenoid valve (referred to as solenoid valve) in the gas detector on the market uses a 250VAC mechanical contact relay to control the switch. Since the solenoid valve is an inductive load, when the solenoid valve is switched, the surge voltage of the solenoid valve power supply is relatively high. , Ordinary mechanical relay contacts are easy to burn out and easy to stick. Using RC suppr...

AI Technical Summary

Problems solved by technology

[0003] The switch circuit of the AC 220V power supply solenoid valve (referred to as solenoid valve) in the gas detector on the market uses a 250VAC mechanical contact relay to control the switch. Since the solenoid valve is an inductive load, when the solenoid valve is switched, the surge voltage of the solenoid valve power supply is relatively high. , Ordinary mechanical relay contacts are easy to burn out and easy to stick. Using RC suppression circuit requires high-voltage and high-power devices. The device is large in size, which can only delay the life of the relay contacts, but cannot completely avoid contact sticking or burning out.

In the prior art, the thyristor is a switch control element, which can not only be used as a switch element alone, but also can be combined with a mechanical contact relay to realize a composite switch. However, although the above switch can achieve certain effects, its structure It is more complicated, and the power consumption, especially the power consumption of the thyristor, is relatively large (especially at high current), and it is usually a separate combined component for circuit design, and the structure and power consumption are relatively large. Therefore, a design is made. There is a strong demand for integrated, simple, reliable and low-power solenoid valve integrated switches

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