CN2333045Y - Automatic ventilation alarm for gas leakage - Google Patents
Automatic ventilation alarm for gas leakage Download PDFInfo
- Publication number
- CN2333045Y CN2333045Y CN 98217884 CN98217884U CN2333045Y CN 2333045 Y CN2333045 Y CN 2333045Y CN 98217884 CN98217884 CN 98217884 CN 98217884 U CN98217884 U CN 98217884U CN 2333045 Y CN2333045 Y CN 2333045Y
- Authority
- CN
- China
- Prior art keywords
- triode
- relay
- alarm
- air draft
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
Abstract
The utility model provides an automatic ventilation alarm for gas leakage. The utility model is mainly characterized in that the output end of DC power supply is respectively connected with a gas sensitive element, a control circuit, and an alarm, wherein, the control circuit is composed of the gas sensitive elements, a relay, and a triode; the gas sensitive element is connected in series on the base of the triode, and the relay is connected in series on the collector of the triode; the relay is respectively provided with a control alarm and a normally open contact of power supply of an exhaust fan. The utility model has the advantages of simple structure, convenient manufacture and installation, low cost, less misoperation, self-locking and testing capability, stable performance, reliability, safe and convenient operation, etc.
Description
The utility model relates to a kind of warning device of accident or abnormal operation situation of appointment, the automatic air draft warning device of especially a kind of gas leak.
At present, coal gas remains the widely used main fuel of town dweller, though it is easy to use, and clean hygiene, it mainly shows the toxic of human body and the possibility that fires in case the harm that leakage is caused also is huge.Therefore, using coal gas how correctly, safely is the problem of people's common concern, does not solve well so far.Chinese patent CN2139283Y discloses a kind of " combustible gas leakage alarm control device ", it mainly is made of institutes such as transformer, bridge rectifier circuit, testing circuit, SCR control circuit and automatic stop valves, trigger the multichannel control circuit by the combustible gas leakage testing circuit, cut off flammable source of the gas simultaneously, start exhaust fan and send sound warning earlier.Though this control device perfect in shape and function, complete, trouble is made and installed to its complex structure, the production cost height, and stability is not good enough and easy maloperation etc., in actual use inconvenience is arranged, so its application is subjected to certain restriction more.
The purpose of this utility model just is to overcome above-mentioned the deficiencies in the prior art part, provide a kind of simple in structure, make, it is all convenient to install, production cost is low, is difficult for producing maloperation, has self-locking and measuring ability, stable performance, reliable and manipulate safety, the easy automatic air draft warning device of gas leak.
The purpose of this utility model can reach by implementing following technical proposal: power unit of the present utility model is made up of transformer and rectification circuit, and gas sensor, control circuit and alarm insert its output terminal respectively.Wherein said control circuit is made of the relay and the triode that are serially connected in the gas sensor on the transistor base and be serially connected on the transistor collector.The normally opened contact of above-mentioned relay control is connected on the AC power line of vent fan and on the power circuit of alarm.Whether preferably be serially connected with a current-limiting resistance and Chang Kai detector switch on the described transistor base, it is normal to be used for detecting control circuit; Can also be connected in series between the collector and emitter of above-mentioned triode one and often drive self-holding contact and a normally closed reset switch by the control of above-mentioned relay; By the normally opened contact of above-mentioned relay control with in parallel with the conventional power switch of vent fan be good, and export to vent fan with socket type.
Accompanying drawing is the circuit connection diagram of the utility model embodiment.
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail: the secondary coil output terminal at power transformer B is serially connected with commutation diode D and capacitor C and constitutes a closed-loop path thus, and the two ends of this capacitor C are connecting to go here and there on the base stage current-limiting resistance R and Chang Kai detector switch K
1Switch triode BG, be serially connected with relay J on the collector of this switch triode BG, the audio alert ic chip of band loudspeaker Y is attempted by the two ends of capacitor C, and on its power circuit the normally opened contact N by relay J control is set
1What be connected in series with relay J control between collector and emitter often opens self-holding contact N
2With normally closed reset switch K
2, be connected between the base stage and emitter of switch triode BG as the commercially available gas sensor MC of gas sensor.Another normally opened contact N by relay J control
3With the ordinary tap K on the vent fan socket CZ power circuit
3Be connected in parallel.In the use of the utility model product, if power transformer B energized, gas sensor MC, switch triode BG and audio alert ic chip all are in holding state.In case taking place, gas leak will in the coil of relay J, be had electric current to pass through to trigger its normally opened contact of adhesive simultaneously N by gas sensor MC induction and trigger switch triode BG conducting
2, N
1And N
3Cause the current collection one emitter short circuit self-locking of switch triode BG respectively, audio alert ic chip and vent fan socket CZ turn-on power simultaneously also send the warning speech signal respectively and carry out exhaust ventilation, and until the gas leak Be Controlled, danger is excluded the back by the normally closed reset switch K of artificial disconnection
2Remove and report to the police and air draft.Can often open detector switch K by closure at ordinary times
1Replace gas sensor MC trigger switch triode BG, and then check this product whether working properly.
The utility model has simple in structurely compared with prior art, and it is all convenient to make, install, and produces Cost is low, is difficult for producing maloperation, has self-locking and measuring ability, stable performance, and peace is used in reliable and operation Entirely, the characteristics such as easy are fit to be used as civilian or industrial fuel gas detection alarm and air draft control dress Put.
Claims (4)
1. the example device is reported in the automatic air draft of gas leak, comprise direct supply, gas sensor, control circuit, alarm and vent fan, it is characterized in that control circuit by be serially connected in the gas sensor (MC) on triode (BG) base stage and be serially connected in relay (J) on triode (BG) collector and triode (BG) constitute the normally opened contact (N of described relay (J)
1), (N
3) be separately positioned on the power circuit of vent fan and alarm.
2. the automatic air draft warning device of gas leak according to claim 1 is characterized in that being serially connected with current-limiting resistance (R) and often opening detector switch (K on the base stage of described triode (BG)
1).
3, the automatic air draft warning device of gas leak according to claim 1 and 2 is characterized in that being serially connected with between the collector of described triode (BG) and the emitter and often opens self-holding contact (N by relay (J) control
2) and normally closed reset switch (K
2).
4, the automatic air draft warning device of gas leak according to claim 1 is characterized in that the normally opened contact (N that described relay (J) is controlled
3) with the conventional power switch (K of vent fan
3) be connected in parallel, and export to vent fan with socket (CZ) form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98217884 CN2333045Y (en) | 1998-08-04 | 1998-08-04 | Automatic ventilation alarm for gas leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98217884 CN2333045Y (en) | 1998-08-04 | 1998-08-04 | Automatic ventilation alarm for gas leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2333045Y true CN2333045Y (en) | 1999-08-11 |
Family
ID=33970333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98217884 Expired - Fee Related CN2333045Y (en) | 1998-08-04 | 1998-08-04 | Automatic ventilation alarm for gas leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2333045Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105389953A (en) * | 2015-12-02 | 2016-03-09 | 天津爱维数据系统集成科技有限公司 | Gas monitor capable of automatic exhausting |
| CN107909759A (en) * | 2017-12-06 | 2018-04-13 | 郑州天舜电子技术有限公司 | A kind of lasting alarm based on infrared induction technology |
-
1998
- 1998-08-04 CN CN 98217884 patent/CN2333045Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105389953A (en) * | 2015-12-02 | 2016-03-09 | 天津爱维数据系统集成科技有限公司 | Gas monitor capable of automatic exhausting |
| CN107909759A (en) * | 2017-12-06 | 2018-04-13 | 郑州天舜电子技术有限公司 | A kind of lasting alarm based on infrared induction technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |