CN200965722Y - A toxic gas alarm device - Google Patents
A toxic gas alarm device Download PDFInfo
- Publication number
- CN200965722Y CN200965722Y CN 200620126828 CN200620126828U CN200965722Y CN 200965722 Y CN200965722 Y CN 200965722Y CN 200620126828 CN200620126828 CN 200620126828 CN 200620126828 U CN200620126828 U CN 200620126828U CN 200965722 Y CN200965722 Y CN 200965722Y
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- CN
- China
- Prior art keywords
- circuit
- alarm
- delay
- executive
- housing
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- Expired - Fee Related
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- 239000002341 toxic gas Substances 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 3
- 230000006870 function Effects 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
A poison gas alarm that comprises a shell which is provided with a gas sensor and a buzz-alarming circuit inside is characterized in that the shell is also provided with a delay comparison circuit, a memory circuit and an executive circuit. The delay comparison circuit consists of a comparison circuit that the given potential value is adjustable and a delay circuit that the delay time is adjustable. The input of the comparison circuit is connected with the output potential of the gas sensor by a resistance while the output of the comparison circuit is connected with the given potential. A capacitance C is arranged between the input and the output of the comparison circuit. The buzz-alarming circuit and the executive circuit are connected in parallel at the backside of the memory circuit. The executive circuit which comprises a contactless controlling switch and an electromagnetic valve is used to control the open-close of the exhaust unit or the wind structure. The utility model not only has the function of alarming, but also can execute the exhaust system or blast system and eliminate dangers while alarming. The utility model is simple in structure and can be applied in kitchens, workshops and mines, etc.
Description
Technical field
The utility model relates to a kind of warning device, particularly a kind of toxic gas alarm.
Background technology
Generally all there are following two defectives in the gas alarm that uses in the prior art: the one, and false alarm takes place in short and gas that do not have harm easily occurrent and duration to some; The 2nd, only possess single warning function, when reporting to the police, can not carry out exhaust or blower system, in case little or when damaging voiceless sound and sending between alarm sound, cause very big harm easily.
Summary of the invention
Technical problem to be solved in the utility model is at the deficiencies in the prior art, provide a kind of false alarm rate little, have a kind of toxic gas alarm of reporting to the police and carrying out exhaust or air blast function simultaneously.
Technical problem to be solved in the utility model is to realize by following technical scheme.The utility model is, a kind of toxic gas alarm, it comprises housing, be provided with gas sensor and buzzer alarm circuit in the housing, be characterized in, in housing, also be provided with time-delay comparator circuit, memory circuit and executive circuit, described time-delay comparator circuit is made up of the adjustable delay circuit of the adjustable comparator circuit of given potential value and delay time, the comparator circuit input end links to each other with the output terminal current potential of gas sensor by resistance, the given current potential of another termination is connected to capacitor C between input end and the output terminal; After described buzzer alarm circuit and executive circuit were connected to memory circuit, described executive circuit was made up of contactless gauge tap and solenoid valve, and described executive circuit is used to control the keying of exhaust apparatus or air-blast device.
Gas sensor of the present utility model is selected for use and can be produced the sensor sensitive part to required warning toxic gas, and the voltage at its two ends can reflect the concentration of harmful gas in circuit.Under regular situation, the output terminal current potential of gas sensor should be higher than given current potential, and when harmful gas concentration surpassed setting, the output terminal current potential of gas sensor was lower than given current potential, the capacitor C discharge.If the harmful gas time of origin surpasses delay time, the time-delay comparator circuit will send signal, remember by memory circuit, otherwise, the capacitor C charging, time-delay comparator circuit no signal is sent; Memory circuit is controlled warning circuit and executive circuit simultaneously.
Technical problem to be solved in the utility model can also further realize by following technical scheme.Above-described a kind of toxic gas alarm is characterized in, described housing is made of base and alarm loam cake, covers on the alarm and is provided with mesh, and alarm loam cake inboard is provided with the dust cover that is fixed as one with it.Like this, have well dustproof effect, can prolong its serviceable life to a certain extent.
Compared with prior art, the utlity model has following advantage: the one, false alarm can not take place in short and gas that do not have harm occurrent and duration to some; The 2nd, it not only is equipped with warning function, and can also carry out exhaust or blower system when reporting to the police, and can get rid of harm timely; The 3rd, the utility model is simple in structure, and usable range is wide, can be applicable to places such as kitchen, workshop and mine.
Description of drawings
Accompanying drawing is a kind of schematic block diagram of the present utility model.
Embodiment
Embodiment 1.With reference to accompanying drawing.A kind of toxic gas alarm, it comprises housing, be provided with gas sensor 1 and buzzer alarm circuit 4 in the housing, in housing, also be provided with time-delay comparator circuit 2, memory circuit 3 and executive circuit 5, described time-delay comparator circuit 2 is made up of the adjustable delay circuit of the adjustable comparator circuit of given potential value and delay time, the comparator circuit input end links to each other with the output terminal current potential of gas sensor 1 by resistance 6, and the given current potential of another termination is connected to capacitor C between input end and the output terminal; After described buzzer alarm circuit 4 and executive circuit 5 were connected to memory circuit 3, described executive circuit 5 was made up of contactless gauge tap and solenoid valve, and described executive circuit 5 is used to control the keying of exhaust apparatus or air-blast device.
Embodiment 2.Embodiment 1.With reference to accompanying drawing.A kind of toxic gas alarm, it comprises housing, be provided with gas sensor 1 and buzzer alarm circuit 4 in the housing, in housing, also be provided with time-delay comparator circuit 2, memory circuit 3 and executive circuit 5, described time-delay comparator circuit 2 is made up of the adjustable delay circuit of the adjustable comparator circuit of given potential value and delay time, the comparator circuit input end links to each other with the output terminal current potential of gas sensor 1 by resistance 6, and the given current potential of another termination is connected to capacitor C between input end and the output terminal; After described buzzer alarm circuit 4 and executive circuit 5 are connected to memory circuit 3, described executive circuit 5 is made up of contactless gauge tap and solenoid valve, described executive circuit 5 is used to control the keying of exhaust apparatus or air-blast device, described housing is made of base and alarm loam cake, cover on the alarm and be provided with mesh, alarm loam cake inboard is provided with the dust cover that is fixed as one with it.
Claims (2)
1, a kind of toxic gas alarm, it comprises housing, be provided with gas sensor (1) and buzzer alarm circuit (4) in the housing, it is characterized in that, in housing, also be provided with time-delay comparator circuit (2), memory circuit (3) and executive circuit (5), described time-delay comparator circuit (2) is made up of the adjustable delay circuit of the adjustable comparator circuit of given potential value and delay time, the comparator circuit input end links to each other with the output terminal current potential of gas sensor (1) by resistance (6), the given current potential of another termination is connected to capacitor C between input end and the output terminal; After described buzzer alarm circuit (4) and executive circuit (5) were connected to memory circuit (3), described executive circuit (5) was made up of contactless gauge tap and solenoid valve, and described executive circuit (5) is used to control the keying of exhaust apparatus or air-blast device.
2, a kind of toxic gas alarm according to claim 1 is characterized in that, described housing is made of base and alarm loam cake, covers on the alarm and is provided with mesh, and alarm loam cake inboard is provided with the dust cover that is fixed as one with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126828 CN200965722Y (en) | 2006-10-23 | 2006-10-23 | A toxic gas alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126828 CN200965722Y (en) | 2006-10-23 | 2006-10-23 | A toxic gas alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200965722Y true CN200965722Y (en) | 2007-10-24 |
Family
ID=38869739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620126828 Expired - Fee Related CN200965722Y (en) | 2006-10-23 | 2006-10-23 | A toxic gas alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200965722Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247124A (en) * | 2013-05-06 | 2013-08-14 | 渭南师范学院 | Human body induction type burglar alarm with memory function |
-
2006
- 2006-10-23 CN CN 200620126828 patent/CN200965722Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247124A (en) * | 2013-05-06 | 2013-08-14 | 渭南师范学院 | Human body induction type burglar alarm with memory function |
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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 |