CN2605620Y - Domestic gas leakage alarm - Google Patents
Domestic gas leakage alarm Download PDFInfo
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- CN2605620Y CN2605620Y CN 03214540 CN03214540U CN2605620Y CN 2605620 Y CN2605620 Y CN 2605620Y CN 03214540 CN03214540 CN 03214540 CN 03214540 U CN03214540 U CN 03214540U CN 2605620 Y CN2605620 Y CN 2605620Y
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Abstract
The utility model relates to a domestic gas leakage alarm which comprises a power circuit, a gas sensing probe QM, an operation amplifying integrated circuit IC2, resistances R1, R2, R3, R4, R5 and R6, a capacitor C3, an adjustable resistor W, a switching triode V, an alarm horn Y and an electromagnetic coil L. Wherein the resistance R1 is a probe signal current limiting capacitance; the capacitances R2 and R2-1 are capacitances for temperature compensation; the capacitance R4 is a signal reference sample; the resistance R3, the capacitance C3 and a diode D5 constitute a switch-on delay circuit; the resistance R2 serves as a charge resistance of the capacitance C3. The power circuit consists of a transformer B, a rectifier circuits D1-D4, capacitors C1, C2 and a voltage regulating block IC1. The circuits of the resistors R5, R6, R7 are respectively connected in series with light-emitting diodes D6, D7 and D8. Low-voltage pulse signals are output from both ends of the electromagnetic coil L and are connected with an external connected electromagnetic valve. The circuit design of the utility model which focuses on the operation amplifying integrated circuit is largely simplified compared with the traditional circuit and has the advantages of reasonable structure, reliability, less power consumption, low cost and easy production.
Description
One, technical field: the utility model relates to a kind of fuel gas alarm, is particularly suitable for the leakage-preventing household gas leakage alarm of family's combustion gas.
Two, background technology: existing fuel gas alarm mostly adopts independent vigour part to form, and its element is many, complex structure, poor stability, the wrong report phenomenon often occurs, serviceable life weak point, poor safety performance.
Three, summary of the invention: the utility model is exactly at above-mentioned the deficiencies in the prior art part, and a kind of circuit level and the high household gas leakage alarm of stability are provided.
The technical solution of the utility model comprises power circuit, gas-sensing probe QM, computing amplification circuit IC2, resistance R 1, R2, R3, R4, R5, R6, R7 capacitor C 3, adjustable resistance W, switch triode V, alarming horn Y, solenoid L forms, wherein resistance R 1 is the probe signal current-limiting resistance, resistance R 2, R2-1 is a thermo-compensator, resistance R 4 is the signal criterion sampling, resistance R 3, capacitor C 3, diode D5 forms the start delay circuit, resistance R 2 is charging resistors of capacitor C 3, resistance R 5, R6, R7 is a current-limiting resistance, and IC2 is 8 leg dual operational amplifiers.Power circuit is made up of transformer B, rectification circuit D1-D4, capacitor C1, C2, regulator block IC1.On the circuit of current-limiting resistance R5, R6, R7, be in series with light emitting diode D6, D7, D8 respectively,,, be connected with external solenoid valve at the two ends of solenoid L output low voltage pulse signal as pre-thermal light D6, relay indicating light D7, alarm lamp D8.
Circuit design of the present utility model is a core with the computing amplification circuit, simplifies traditional circuit greatly, have rational in infrastructure, reliable, power saving, cost low, be convenient to make.
Four, description of drawings:
Accompanying drawing is through type circuit theory diagrams of the present utility model.
Five, embodiment:
The contrast accompanying drawing, transformer B becomes low-voltage AC with civil power, is direct current by diode D1-D4 rectification, and capacitor C1, C2 are the direct supply filter capacitor, and regulator block IC1 provides 5V DC voltage.QM is the air-sensitive sensing probe, and potentiometer W adjusts air-sensitive sensitivity, and resistance R 1 is the probe signal current-limiting resistance, resistance R 2, R2-1 are thermo-compensators, R4 is the signal criterion sampling, and resistance R 3, capacitor C 3, diode D5 form the start delay circuit, prevents the start wrong report.IC2 is 8 leg dual operational amplifiers: 1 leg is that signal amplifies output, and 2 legs are that signal amplifies negative input, and 3 legs are that signal amplifies positive input, 4 leg ground connection, and 5 legs are the delay circuit positive input, the negative input of 6 leg delay circuits, 7 legs output time delayed signal voltage.Resistance R 5 is the current-limiting resistance of IC2 the 7th leg output voltage; light emitting diode D8 is an alarm lamp; light emitting diode D6 is a time dalay indicator light; resistance R 6 is current-limiting resistances of D6; light emitting diode D7 is a relay indicating light; resistance R 7 is current-limiting resistances of D7; diode D9 protection triode V prevents that reverse voltage from puncturing triode V; the effect of triode V is that the output voltage of amplification IC2 the 7th leg promotes loudspeaker Y and solenoid L provides field signal to turn-off solenoid valve to solenoid valve, and diode D9 prevents that solenoid from producing reverse voltage and puncturing triode V.The running parameter of foregoing circuit and existing circuit parameter basically identical are no longer carefully stated.Need to prove to connect one group of resistance and electric capacity (not drawing among the figure) at the two ends of solenoid L, and be directly connected on the solenoid valve that controlling plumbing fixtures opens that resistance is the charging resistor of electric capacity, electric capacity provides pulse voltage for solenoid L.When warning takes place, close solenoid valve like this, thereby cut off source of the gas.
Claims (3)
1, a kind of household gas leakage alarm, it is characterized in that: comprise power circuit, gas-sensing probe (QM), computing amplification circuit (IC2), resistance (R1, R2, R3, R4, R5, R6, R7), electric capacity (C3), adjustable resistance (W), switch triode (V), alarming horn (Y) is formed, wherein resistance R 1 is the probe signal current-limiting resistance, resistance (R2) is thermo-compensator, resistance (R4) is the signal criterion sampling, resistance (R3), electric capacity (C3), diode (D5) is formed the start delay circuit, resistance (R2) is the charging resistor of electric capacity (C3), resistance (R5, R6, R7) be current-limiting resistance, integrated circuit (IC2) is 8 leg dual operational amplifiers.
2, according to claims 1 described household gas leakage alarm, it is characterized in that: power circuit is made up of transformer (B), rectification circuit (D1-D4), capacitor (C1, C2), regulator block (IC1).
3, according to claims 1 or 2 described household gas leakage alarms, it is characterized in that: on the circuit of current-limiting resistance (R5, R6, R7), be in series with light emitting diode (D6, D7, D8) respectively, as pre-thermal light (D6), relay indicating light (D7), alarm lamp (D8), go up solenoid in parallel (L) at alarming horn (Y), at the two ends of solenoid (L) output low voltage pulse signal, be connected with external solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03214540 CN2605620Y (en) | 2003-01-03 | 2003-01-03 | Domestic gas leakage alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03214540 CN2605620Y (en) | 2003-01-03 | 2003-01-03 | Domestic gas leakage alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2605620Y true CN2605620Y (en) | 2004-03-03 |
Family
ID=34159700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03214540 Expired - Fee Related CN2605620Y (en) | 2003-01-03 | 2003-01-03 | Domestic gas leakage alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2605620Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103473895A (en) * | 2013-09-10 | 2013-12-25 | 江苏省常州技师学院 | Harmful gas remote alarm system |
-
2003
- 2003-01-03 CN CN 03214540 patent/CN2605620Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103473895A (en) * | 2013-09-10 | 2013-12-25 | 江苏省常州技师学院 | Harmful gas remote alarm system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Designer after: Wang Guohua Designer after: Chen Xingluan Designer after: Chen Wei Designer after: Yu Guanghe Designer after: Lin Zhenqiang Designer before: Wang Guohua Designer before: Chen Xingluan Designer before: Yu Guanghe Designer before: Lin Zhenqiang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: DESIGNER; FROM: WANG GUOHUA CHEN XINGLUAN YU GUANGHE LIN ZHENQIANG TO: WANG GUOHUA CHEN XINGLUAN CHEN WEI YU GUANGHE LIN ZHENQIANG |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |