CN2123793U

CN2123793U - Kitchen gas alarm device with clock

Info

Publication number: CN2123793U
Application number: CN 92219085
Authority: CN
Inventors: 魏强
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-10
Filing date: 1992-06-10
Publication date: 1992-12-02

Abstract

The utility model relates to a kitchen gas alarm device with a clock. A housing panel is provided with the strobe light of gas alarm D7 (5) and the resonant cavity of a piezoelectric buzzer FT (6), and a starting up delay circuit, an alarm point setting circuit, a gate controlling oscillator and an acoustic-optic circuit are relative with the housing and are arranged in the shell. The utility model is characterized in that the panel is also provided with a timing knob W (8) and a dial (7), and a relative timing alarm circuit is arranged in the shell. The utility model has the advantages of simple and compact structure, high reliability and convenient operation, and the utility model can alarm to combustible gas and has the function of timing reminding.

Description

Kitchen gas alarm device with clock

The utility model relates to the combustible gas alarm for kitchen use of a kind of energy timing.

At present, inflammable gass such as coal gas, liquefied petroleum gas (LPG) or rock gas are all used in the kitchen of many families, wherein exist combustible gas and leak the danger that causes fire explosion.It is reported, cause that the main cause that combustible gas leaks is that fire puts out by the water that overflows in the pot or by wind when cooking, so that inflammable gas fills the air whole kitchen,, run into the sparking of naked light or electrical equipment and then can produce blast as in time not found.In another case, the personnel of cooking leave the kitchen and have forgotten and hot plate the needed time of thing, and pot is dryouied also fire hazard.But existing kitchen alarm performance is single, can only be to warnings such as coal gas, and complex structure, reliability is low, and does not have the time reminding device.

The purpose of this utility model provide a kind of simple in structure, cost is low, reliability is high, the flammable alarm of the timing being convenient to operate, to remedy the above-mentioned deficiency of existing kitchen alarm.

The stroboscopic lamp D that has pair combustible gas to report to the police on the panel of the present utility model ₇With piezoelectric buzzer resonator FT, associated start delay circuit, alarm set point initialization circuit, gate control oscillator and sound light alarming circuit are arranged in its housing, it is characterized in that also having regularly knob W and index dial on its panel, associated timing circuit is arranged in housing.

The utility model has the advantages that simple in structure, compact, reliability is high, be convenient to the operation, can report to the police to combustible gas, the function of time reminding is arranged again.

Further specify concrete structure of the present utility model and working condition below by embodiment and accompanying drawing.

Accompanying drawing 1 is a panel construction synoptic diagram of the present utility model, and accompanying drawing 2 is a vertical view of the present utility model, and accompanying drawing 3 is an electronic circuit schematic in its housing.The utility model is wall-hanging, and power supply, gas alarm switch (2), power work pilot lamp (3), timer switch (4), warning stroboscopic lamp (5), piezoelectric buzzer resonator (6), index dial (7), timing knob (8), sheet metal (9) and gas sensor louver(-vre) mouth (10) are arranged on its housing (1).Used the QM-N10 gas sensor in its shell in the electronic circuit, its resistance in pure air has tens kilo-ohms approximately, and after it touched combustible gas, resistance then sharply descended, and the amplitude of this decline is directly proportional with concentration below 0.5%.By QM-N10 gas sensor, R ₂And R ₃Form combustible gas alarm set point initialization circuit, by IC ₁, IC ₂, R ₄And D ₆Form the start delay circuit, adjust R ₄Can decide delay time t ₁It is 0.3% butagas sample that the QM-N10 gas sensor is placed concentration, adjusts R ₃Make IC ₁Output terminal is converted to low level by high level, makes sound light alarming circuit work.By IC ₂, IC ₃, R ₅, R ₆And C ₃Form gate control oscillator, when combustible gas leakage concentration reaches alarm set point, IC ₄Output becomes high level by low level, and the gate control oscillator starting of oscillation drives by BG ₁, BG, B ₂, R ₈, R ₉, C ₄, R ₁₀And D ₇The sound light alarming circuit work of forming produces interrupted sound and light alarm sound.By IC ₅(NE555), C ₅, C ₆Form timing circuit with W, when needing regularly, catch and touch sheet metal A(9), this circuit enters definition status immediately, and its timing length is by W and C ₅Decision, according to the fixed time seeing scale on the index dial (7), adjust regularly knob W(8), definition status finishes just to produce sound and light alarm, plays reminding effect.

Claims

1, a kind of kitchen timing combustible gas alarm, the stroboscopic lamp D that on its housing face-plate, has pair combustible gas to report to the police ₇(5) and piezoelectric buzzer resonant cavity FT (6), associated start delay circuit, alarm set point initialization circuit, gate control oscillator and acousto-optic circuit are arranged in its housing, it is characterized in that also having regularly knob W (8) and index dial (7) on its panel, associated timing and alarming circuit is arranged in housing.