CN2692661Y

CN2692661Y - Safety alarm for gas cooking range

Info

Publication number: CN2692661Y
Application number: CN 200320109730
Authority: CN
Inventors: 姚英斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-06
Filing date: 2003-11-06
Publication date: 2005-04-13
Anticipated expiration: 2013-11-06

Abstract

The utility model discloses a safety alarm for a gas cooking range, comprising a synchro switch, a photoelectric sensor, a control circuit, an alarm unit and an electromagnetic valve. The observed gas alarm in the market at the present time has the lethal disadvantages of that the alarm self is failure, the user doesn't have any perception; the automatic test is hard; the malignant accident is easy to be generated. The utility model solves the above disadvantages; when the utility model reliably alarms, the self-checking is conveniently carried out at any time; judging whether the self working is normal or not. The safety alarm for a gas cooking range has safety and reliability, easy use and simple structure.

Description

The gas range safety alarm

The utility model relates to a kind of electronic alarm, particularly a kind of gas range safety alarm.Equally also be applicable to various combustion gas and combustion gas firing equipment.

The gas leak detector that existing market is seen, all be to adopt gas sensor whether to detect gas leakage, as Chinese patent cn98232853.2, cn98218422.0, cn99217048.6 etc., this alarm has fatal shortcoming: be exactly that alarm self lost efficacy, the user has no consciousness, also be difficult to therefore can not effectively get rid of the generation of serious accident from performing check, people also can't produce it and trust.

The purpose of this utility model is exactly for overcoming the shortcoming of above-mentioned prior art, propose a kind of gas range safety alarm, and it can be when accidents such as the poisoning that effectively prevents to cause because of gas leakage, blast take place, can be at any time, self check easily.

This gas range safety alarm comprises synchro switch, photoelectric sensor, the control circuit that joins with synchro switch and photoelectric sensor output terminal, the alarm unit that joins with this control circuit output terminal and the solenoid valve of control jet.

When using gas range, with the synchronous synchro switch output signal of installing of gas range valve, photoelectric sensor detects also output signal of gas-fired flame simultaneously, control circuit judges that the gas range burning is normal, when accident extinguishing, synchro switch is output signal still, and photoelectric sensor no signal output because of no flame, this moment, control circuit was judged gas leak, sent alerting signal, and this alerting signal can be used for handling the relevant work of gas leakage, for example close solenoid valve, open vent fan, sound, signal alarms such as flash of light.

The utility model has the advantages that can reliable detection can be at any time in the gas leakage, self check easily, whether normal to judge work itself.Method is as follows:

When igniting, first gas delivery postpones to light a fire after moment, synchronized switching signal arrives first, and arrives the exportable of short duration alerting signal of control circuit after the photo-sensor signal will, sound, light alarm unit and then send a kind of alerting signal, can judge thus that the gas range safety alarm is working properly.This gas range safety alarm has safe and reliable, and is easy to use, and characteristic of simple structure has promotional value.

Description of drawings

Fig. 1 is a theory diagram of the present utility model.

Fig. 2 is an embodiment circuit diagram of the present utility model, introduces its principle of work below:

S1 is a synchro switch, with the gas cooker switch synchronization action.S1 closure when turning on the gas-fire the kitchen range switch, the N1 output low level through being high level after the shaping of IC1A Schmidt circuit, is delivered to single-chip microcomputer IC6 2 pin; S1 disconnects when gas cooker switch is closed, and the level of delivering to single-chip microcomputer 2 pin is a low level.P1 is a photodiode, when gas-fired, produces flame, and flame rayed P1, P1 are low resistance, and the N2 output low level is a high level after IC1B Schmidt shaping, delivers to single-chip microcomputer IC6 3 pin.When coal gas does not burn, no flame rayed P1, this moment, P1 was a high resistance, N2 exports high level, is low level after the IC1B shaping, delivers to single-chip microcomputer IC6 3 pin.

IC6 is a single-chip microcomputer, and according to the program that weaves, when the gas range operate as normal was burnt, 2,3 pin were high level, and export the operate as normal signal this moment, and its 19 pin is a low level, and green pilot lamp L1 is bright.When the coal gas air feed interrupts, or combustion flame is by wind, when water extinguishes, IC6 3 pin are low level, 2 pin still are high level, single-chip microcomputer judges that immediately this moment, gas range should burn and unburned, and send alerting signal: its 19 pin is a high level, and green light L1 extinguishes, 18 pin output low levels, red pilot lamp L2 is bright; 17 pin output alarm sound signals drive loudspeaker through N3 and send alarm sound; 16 pin output high level drives closed electromagnetic valve coal gas air-supplying valve through N4, drives relay through N5 and makes its contact connect vent fan, discharges coal gas.

The action of above-mentioned driving solenoid valve and relay through Single-chip Controlling than the red pilot lamp L2 that reports to the police bright and alert audio sound lag several seconds, utilize the time-delay user in these several seconds can the work of detection alarm device whether normal, method is as follows:

When turning on the gas-fire the kitchen range switch, synchro switch S1 action, making IC6 2 pin is high level, because gas cooker switch does not forward the sparking position as yet to, coal gas is unburned still, no combustion flame rayed photodiode, IC6 3 pin are low level, alarm was sounded and was reported to the police and the bright alerting signal of red light this moment, and therefore alarm can Normal Alarm as can be known for the user, and because time-delay solenoid valve in a few second and vent fan can malfunctions; Forward sparking after a while to and beat behind the position and catch fire, combustion flame irradiates light electric diode, IC6 3 pin are high level, single-chip microcomputer judgement gas range is working properly, stops to send the chimes of doom light signal.

B1 is a rechargeable battery among the figure, can guarantee the alarm operate as normal when outer power supply source interrupts.R6, C1 are reset circuit of single chip computer, and R7, R8, D1, C2 are the power down protection circuit.

Claims

1, a kind of gas range safety alarm is characterized in that comprising synchro switch, photoelectric sensor, the control circuit that joins with synchro switch and photoelectric sensor output terminal, the alarm unit that joins with this control circuit output terminal and the solenoid valve of control jet.

2, alarm as claimed in claim 1 is characterized in that said synchro switch is installed on the gas range valve, and open and close synchronous with it.