CN1664468A - Gas leakage protector with an external A/D converter of gas water heater - Google Patents
Gas leakage protector with an external A/D converter of gas water heater Download PDFInfo
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- CN1664468A CN1664468A CN 200510049317 CN200510049317A CN1664468A CN 1664468 A CN1664468 A CN 1664468A CN 200510049317 CN200510049317 CN 200510049317 CN 200510049317 A CN200510049317 A CN 200510049317A CN 1664468 A CN1664468 A CN 1664468A
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- gas
- converter
- input end
- output terminal
- gas leakage
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Abstract
The invention discloses a gas water heater gas leakage protecting device of output A/D converter that belongs to single chip application in detecting technology. It includes gas sensor, A/D converter, MPU, and impulse gas control valve. The feature is that: the output of the gas sensor connects to the input end of the A/D converter. The I/O input end of MPU in gas water heater control device is connected to the output end of the A/D converter. The MPU output ends connect to impulse gas control valve controlling device and the gas leakage alarming circuit to form gas leakage protecting device. The analog over standard gas leakage value that the gas sensor detected would input to MPU by A/D converter. The MPU control the impulse gas control valve controlling device to cut off the gas supply and alarm. The invention would be used in kinds of gas water heater control device.
Description
Technical field the invention belongs to single-chip microcomputer and is controlled at application in the detection technique in real time.
Before background technology the invention applying date, the gas heater control device does not have gas leakage and detects and warning device.When the gas heater gas leakage, can't report to the police and also can't cut off source of the gas, be unfavorable for user's personal safety protection.
The purpose of summary of the invention the invention provides a kind of single-chip microcomputer that belongs to and is controlled at application in the detection technique in real time.
The technical scheme that the invention solves its technical matters employing is: comprise gas security, A/D converter, single-chip microcomputer and gas-burning pulse operation valve; The gas security output terminal is connected with the A/D converter input end; the single-chip processor i/o input end is connected with the A/D converter output terminal in the gas heater control device; the single-chip microcomputer output terminal is connected with gas-burning pulse operation valve control device and gas leakage alarm circuit, forms gas leakage protector.The simulating signal of gas security is connected with an input end of A/D converter, and eight output terminals of A/D converter are connected with the single-chip processor i/o input end.The I/O output terminal of single-chip microcomputer is that the switching tube base stage is connected with gas-burning pulse operation valve control device input end, and the output terminal of gas-burning pulse control valve device is connected with the gas-burning pulse valve coil.The I/O output terminal of single-chip microcomputer is connected with the switching tube base stage of alarm control circuit, and the collector of switching tube is connected with horn coil.
The beneficial effect of the invention is: the invention is applied in all kinds of gas heater control device.When making gas heater have gas leakage to personal safety protection.
Appended drawings 1 is the electrical schematic diagram of the invention.The single-chip microcomputer model is PIC16C57 among the figure, and the model of A/D converter is AD558.T
1, T
2, T
3, T
4Be gas-burning pulse valve controling circuit switching tube, L is the coil of gas-burning pulse valve, T
5Be warning circuit control circuit switching tube, SP is loudspeaker.
Embodiment is consulted Fig. 1.Single-chip microcomputer adopts and gas heater control circuit same model as far as possible, to save cost.Present embodiment adopts PIC16C57.The input end of A/D digital to analog converter AD558 is connected with the output terminal of combustion gas detecting sensor, and eight output terminals of D/A AD558 are connected with input end I/O (1), I/O (2), I/O (3), I/O (4), I/O (5), I/O (6), I/O (7), the I/O (8) of single-chip microcomputer PIC16C57 respectively.The output terminal I/O (10) of single-chip microcomputer PIC16C57, I/O (11), I/O (12), I/O (13) respectively with the switch transistor T of gas-burning pulse operation valve control circuit
1, T
2, T
3, T
4Base stage is connected, and the collector of switching tube is connected with gas-burning pulse operation valve coil L.The output terminal I/O (14) of single-chip microcomputer PIC16C57 and warning circuit switch transistor T
5Base stage connects, switch transistor T
5Collector be connected with loudspeaker SP.
Claims (4)
1, a kind of gas heater gas leakage protector of external A/D converter comprises gas security, A/D converter, single-chip microcomputer and gas-burning pulse operation valve; It is characterized in that the gas security output terminal is connected with the A/D converter input end; the single-chip processor i/o input end is connected with the A/D converter output terminal in the gas heater control device; the single-chip microcomputer output terminal is connected with gas-burning pulse operation valve control device and gas leakage alarm circuit, forms gas leakage protector.
2, the gas heater gas leakage protector of external A/D converter according to claim 1; the simulating signal that it is characterized in that gas security is connected with an input end of A/D converter, and eight output terminals of A/D converter are connected with the single-chip processor i/o input end.
3, the gas heater gas leakage protector of external A/D converter according to claim 1; the I/O output terminal that it is characterized in that single-chip microcomputer is that the switching tube base stage is connected with gas-burning pulse operation valve control device input end, and the output terminal of gas-burning pulse control valve device is connected with the gas-burning pulse valve coil.
4, the gas heater gas leakage protector of external A/D converter according to claim 1 is characterized in that the I/O output terminal of single-chip microcomputer is connected with the switching tube base stage of alarm control circuit, and the collector of switching tube is connected with horn coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510049317 CN1664468A (en) | 2005-03-09 | 2005-03-09 | Gas leakage protector with an external A/D converter of gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510049317 CN1664468A (en) | 2005-03-09 | 2005-03-09 | Gas leakage protector with an external A/D converter of gas water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1664468A true CN1664468A (en) | 2005-09-07 |
Family
ID=35035675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510049317 Pending CN1664468A (en) | 2005-03-09 | 2005-03-09 | Gas leakage protector with an external A/D converter of gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1664468A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436958C (en) * | 2006-11-22 | 2008-11-26 | 艾欧史密斯(中国)热水器有限公司 | Gas water heater capable of harmful gas monitoring and alarming and method of monitoring and alarming |
-
2005
- 2005-03-09 CN CN 200510049317 patent/CN1664468A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436958C (en) * | 2006-11-22 | 2008-11-26 | 艾欧史密斯(中国)热水器有限公司 | Gas water heater capable of harmful gas monitoring and alarming and method of monitoring and alarming |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |