A household alarm with detecting solenoid valve connection and opening and closing states

Abstract

The invention relates to the technical field of gas alarm, and discloses a household alarm capable of detecting the connection and opening and closing state of an electromagnetic valve, including a processor, and the processor includes a processor control terminal A and a processor acquisition terminal B; The processor control terminal A is electrically connected to the solenoid valve interface P through the solenoid valve control circuit. The mutual cooperation between circuits, etc., on the one hand, by controlling the level of the output terminal of the acquisition resistor R4 at the acquisition terminal B of the processor, thereby judging the connection status of the solenoid valve; on the other hand, by controlling the acquisition terminal B of the processor to acquire the resistance R4 The voltage level of the output terminal can determine the pull-in state of the solenoid valve, so that not only the state of the solenoid valve circuit can be detected, but also the pull-in state of the solenoid valve can be detected.

Description

Technical field [0001] The present invention belongs to the field of gas alarm technology, specifically a household alarm having to detect the connection and opening and closing state of the solenoid valve. Background [0002] Household gas alarm as a civil gas safety precaution product. It can effectively avoid explosions, fires, poisoning and other vicious accidents caused by gas leakage. When the gas alarm detects that the concentration of gas in the environment exceeds the concentration value set by the instrument, the instrument issues a sound and light alarm, and at the same time controls the solenoid valve connected to it, and cuts off the gas pipeline after the solenoid valve is absorbed, effectively avoiding the continuous leakage of gas and causing an explosion and other vicious events. [0003] The Chinese patent no. CN201920847982.6 discloses a gas alarm with solenoid valve status monitoring and remote transmission function, comprising: housing, button, control outpu...

AI Technical Summary

Problems solved by technology

This kind of gas alarm with solenoid valve status monitoring and remote transmission function can monitor the status of the solenoid valve in real time. When any fault or non-action occurs in the valve, the alarm will immediately send out a fault reminder and send the fault information remotely. It is transmitted to the user client APP software to solve the problem that the current household gas alarm can only simply send a control pulse signal to control the closing of the solenoid valve and does not have the functions of data display, voice alarm and remote transmission at the same time; the above gas alarm is only It can detect the state of the solenoid valve, but it does not have the ability to detect the connection and opening and closing state of the solenoid valve. When the instrument alarms, it can only send a pulse signal in a one-way open loop to close the solenoid valve connected to it, but it cannot fail to detect the state of the solenoid valve. In the long-term use of household alarm products, due to the aging of the connecting line or other reasons, after the solenoid valve is disconnected from the alarm, the alarm cannot obtain and indicate this fault information. In this case, if the solenoid valve does not close normally due to a mechanical failure, but the alarm cannot obtain the switching status of the solenoid valve, the remote user may mistakenly think that the gas solenoid valve is closed, and the gas is still leaking at this time, which may easily cause Larger safety accidents; and at present, if the products on the market want to detect the opening and closing state of the solenoid valve, only the three-wire solenoid valve can be used, and it can only detect the opening and closing state of the solenoid valve, and cannot detect the connection state of the solenoid valve. Compared with the two-wire solenoid valve, the solenoid valve has the disadvantage of high product cost, which cannot meet the requirements of large-scale promotion and use.

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