CN2784818Y - Gas leakage protector for gas-fired water heater with externally arranged A/D converter - Google Patents
Gas leakage protector for gas-fired water heater with externally arranged A/D converter Download PDFInfo
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- CN2784818Y CN2784818Y CN 200520100862 CN200520100862U CN2784818Y CN 2784818 Y CN2784818 Y CN 2784818Y CN 200520100862 CN200520100862 CN 200520100862 CN 200520100862 U CN200520100862 U CN 200520100862U CN 2784818 Y CN2784818 Y CN 2784818Y
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- gas
- converter
- gas leakage
- input
- leakage protector
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Abstract
The utility model discloses a gas leakage protector for a gas-fired water heater with an externally arranged A/D converter, which belongs to the application of the real-time control of a single chip computer in a detecting technique. The utility model comprises a gas sensor, an A/D converter, a single chip computer and a pulse gas control valve. The utility model is characterized in that the output end of the gas sensor is connected with the input end of the A/D converter; in a control device of a gas-fired water heater, the input end of the single chip computer I/O is connected with the output end of the A/D converter. The output end of the single chip computer is connected with a control device of the pulse gas control valve and an alarm circuit of gas leakage to form a gas leakage protector. An analogue signal of the over-standard of gas leakage detected by the gas sensor is input into the single chip computer by the A/D converter, and the single chip computer controls the control device of the pulse gas control valve to cut off a gas source and prompts users by alarming. The utility model is applied to various control devices of gas-fired water heaters to make the gas-fired water heater have the function of protecting the safety of the users on the occasion of gas leakage.
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 problem employing is: comprise gas security, A/D converter, single-chip microcomputer and gas-burning pulse control valve; The gas security output is connected with the A/D converter input; the single-chip processor i/o input is connected with the A/D converter output in the gas heater control device; the single-chip microcomputer output is connected with gas-burning pulse control valve control device and gas leakage alarm circuit, forms gas leakage protector.The analog signal of gas security is connected with an input of A/D converter, and eight outputs of A/D converter are connected with the single-chip processor i/o input.The I/O output of single-chip microcomputer is that the switching tube base stage is connected with gas-burning pulse control valve control device input, and the output of gas-burning pulse control valve device is connected with the gas-burning pulse valve coil.The I/O output of single-chip microcomputer is connected with the switching tube base stage of alarm control circuit, and the colelctor electrode 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.
The specific 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 of A/D digital to analog converter AD558 is connected with the output of combustion gas detecting sensor, and eight outputs of D/A AD558 are connected with input 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 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 control valve control circuit
1, T
2, T
3, the T base stage is connected, the colelctor electrode of switching tube is connected with gas-burning pulse control valve coil L.The output I/O (14) of single-chip microcomputer PIC16C57 and warning circuit switch transistor T
3Base stage connects, switch transistor T
5Colelctor electrode 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 control valve; It is characterized in that the gas security output is connected with the A/D converter input; the single-chip processor i/o input is connected with the A/D converter output in the gas heater control device; the single-chip microcomputer output is connected with gas-burning pulse control 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 analog signal that it is characterized in that gas security is connected with an input of A/D converter, and eight outputs of A/D converter are connected with the single-chip processor i/o input.
3, the gas heater gas leakage protector of external A/D converter according to claim 1; the I/O output that it is characterized in that single-chip microcomputer is that the switching tube base stage is connected with gas-burning pulse control valve control device input, and the output 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 of single-chip microcomputer is connected with the switching tube base stage of alarm control circuit, and the colelctor electrode of switching tube is connected with horn coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520100862 CN2784818Y (en) | 2005-03-09 | 2005-03-09 | Gas leakage protector for gas-fired water heater with externally arranged A/D converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520100862 CN2784818Y (en) | 2005-03-09 | 2005-03-09 | Gas leakage protector for gas-fired water heater with externally arranged A/D converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2784818Y true CN2784818Y (en) | 2006-05-31 |
Family
ID=36771791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520100862 Expired - Fee Related CN2784818Y (en) | 2005-03-09 | 2005-03-09 | Gas leakage protector for gas-fired water heater with externally arranged A/D converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2784818Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066461A (en) * | 2015-09-09 | 2015-11-18 | 深圳市福田区青少年科技教育协会 | Water heater gas leakage protection system and device thereof |
-
2005
- 2005-03-09 CN CN 200520100862 patent/CN2784818Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066461A (en) * | 2015-09-09 | 2015-11-18 | 深圳市福田区青少年科技教育协会 | Water heater gas leakage protection system and device thereof |
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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 |