CN201652483U - Flameout protection circuit for gas cooking appliances - Google Patents
Flameout protection circuit for gas cooking appliances Download PDFInfo
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- CN201652483U CN201652483U CN2010201282816U CN201020128281U CN201652483U CN 201652483 U CN201652483 U CN 201652483U CN 2010201282816 U CN2010201282816 U CN 2010201282816U CN 201020128281 U CN201020128281 U CN 201020128281U CN 201652483 U CN201652483 U CN 201652483U
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Abstract
A flameout protection circuit for gas cooking appliances comprises a thermocouple double-coil solenoid valve, a solenoid valve drive circuit, a gas main valve and a voltage comparison circuit, wherein the thermocouple double-coil solenoid valve comprises a thermocouple and a double-coil solenoid valve; the double-coil solenoid valve includes a first coil L1 and a second coil L2; a main valve coil L3 is arranged on the gas main valve; two ends of the main valve coil L3 are connected with the output end of the voltage comparison circuit and the main valve drive output end of the solenoid valve drive circuit respectively; and the thermocouple double-coil solenoid valve is connected with the double-coil solenoid valve drive output end of the solenoid valve drive circuit and the input end of the voltage comparison circuit. The flameout protective circuit has the advantages of effectively cutting off the two gas valves of the gas cooking appliance to avoid gas leakage, providing the control system with flameout signal to close the blower so as to save resource and the like.
Description
Technical field: the utility model relates to a kind of blowout protection circuit of gas kitchen ranges, and it is applicable in the controller of gas kitchen ranges.
Background technology: in the prior art, the household gas utensils that adopt thermocouple to carry out blowout protection have just cut out a thermocouple magnetic valve on the gas circuit usually when accident is flame-out, and the thermocouple magnetic valve damages and then causes gas leak; In addition, the gas kitchen ranges of tape drum wind apparatus is when blowout protection, and thermocouple closed electromagnetic valve rear fan is still in running order, causes defectives such as there being energy waste.In order to overcome these defectives, the blowout protection circuit of gas kitchen ranges is developed.
Summary of the invention: technical problem to be solved in the utility model is the blowout protection circuit that a kind of gas kitchen ranges will be provided; thereby it can cut off the twice burnt gas valve of gas kitchen ranges effectively and avoid gas leak, thereby and provides flame-out signal at stop blower fan energy savings for control system.
The technical scheme that its technical problem that solves the utility model adopts is: it comprises thermocouple dual coil electromagnetic valve, driving circuit for electromagnetic valve, the combustion gas main valve, voltage comparator circuit, described thermocouple dual coil electromagnetic valve comprises thermocouple and dual coil electromagnetic valve, the dual coil electromagnetic valve is provided with the first coil L1, the second coil L2, the combustion gas main valve is provided with main valve coil L3, main valve coil L3 two ends are connected with the output of voltage comparator circuit 4 and the main valve drive output of driving circuit for electromagnetic valve respectively, and thermocouple dual coil electromagnetic valve is connected with the dual coil electromagnetic valve drive output of driving circuit for electromagnetic valve and the input of voltage comparator circuit respectively.
The negative pole end ground connection of the first coil L1, the second coil L2 and thermocouple in the described dual coil electromagnetic valve, the other end of the first coil L1 and the positive terminal of thermocouple are connected with the in-phase input end of voltage comparator circuit, and the other end of the second coil L2 is connected with the dual coil electromagnetic valve drive output of driving circuit for electromagnetic valve.
Described driving circuit for electromagnetic valve comprises triode Q3, triode Q4, diode D2, resistance R 1, resistance R 4, triode Q1, triode Q2, diode D1, resistance R 1, resistance R 2, resistance R 3, resistance R 1 one ends connect the first pin PA0 of single-chip microcomputer, the other end of resistance R 1 is connected in the base stage of triode Q1 and Q3, the grounded emitter of triode Q3, the colelctor electrode of triode Q3 is connected with the positive pole of main valve coil L3 and diode D2, the other end of main valve coil L3 is connected with the colelctor electrode of triode Q4 with the negative pole of diode D2, the emitter stage of triode Q4 is connected with power supply, the base stage of triode Q4 is connected with the second pin PA1 of single-chip microcomputer by resistance R 4, the grounded emitter of triode Q1, the colelctor electrode of triode Q1 is connected by the base stage of resistance R 2 with triode Q2, the emitter stage of triode Q2 is connected with power supply, the colelctor electrode of triode Q2 is connected in the negative pole of the second coil L2 and diode D1, the plus earth of the other end of the second coil L2 and diode D1 by resistance R 1.
Described voltage comparator circuit comprises voltage comparator U, triode Q5, diode D3, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, capacitor C 1, capacitor C 2, one termination power of resistance R 5, the other end of resistance R 5 is connected with resistance R 6 with the positive pole of diode D3, the minus earth of diode D3, the other end of resistance R 6 is connected with the inverting input of resistance R 7 with voltage comparator U, the other end ground connection of resistance R 7, the in-phase input end of voltage comparator U is connected with the positive terminal of thermocouple 6, the output of voltage comparator U respectively with resistance R 8, resistance R 9, capacitor C 1 is connected, another termination power of resistance R 8, the other end ground connection of capacitor C 1, the other end of resistance R 9 is connected with the 3rd pin PA2 of capacitor C 2 and single-chip microcomputer and the base stage of triode Q5, the grounded emitter of triode Q5, the colelctor electrode of triode Q5 is connected with the positive pole of diode D2.
The utility model is compared the beneficial effect that is produced with background technology:
1, because the circuit that the utility model adopts thermocouple dual coil electromagnetic valve 1 to be connected with the input of the dual coil electromagnetic valve drive output of driving circuit for electromagnetic valve 2 and voltage comparator circuit 4 respectively,, thereby and provide flame-out signal at stop blower fan energy savings for control system so thereby the twice burnt gas valve that it can cut off gas kitchen ranges is effectively avoided gas leak.
Description of drawings: Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is used in structural representation on the gas kitchen ranges for Fig. 1.
The specific embodiment: shown in accompanying drawing 1, accompanying drawing 2, present embodiment comprises thermocouple dual coil electromagnetic valve 1, driving circuit for electromagnetic valve 2, combustion gas main valve 3, voltage comparator circuit 4, controller 7, pressure-reducing valve 8, gas inlet pipe 9, switch 10, blower fan 11, burner 12.
Thermocouple dual coil electromagnetic valve 1 comprises thermocouple 6 and dual coil electromagnetic valve 5, dual coil electromagnetic valve 5 is provided with the first coil L1, the second coil L2, the negative pole end ground connection of the first coil L1, the second coil L2 and thermocouple 6, the other end of the first coil L1 and the positive terminal of thermocouple are connected with the in-phase input end of voltage comparator circuit 4, and the other end of the second coil L2 is connected with the dual coil electromagnetic valve drive output of driving circuit for electromagnetic valve 2.
Driving circuit for electromagnetic valve 2 comprises main valve drive circuit and dual coil electromagnetic valve-driving circuit, and triode Q3, triode Q4, diode D2, resistance R 1, resistance R 4 are formed the main valve drive circuit; Triode Q1, triode Q2, diode D1, resistance R 1, resistance R 2, resistance R 3 are formed the dual coil electromagnetic valve-driving circuit.Resistance R 1 one ends connect the pin PA0 of single-chip microcomputer, the other end of resistance R 1 is connected in the base stage of triode Q1 and Q3, the grounded emitter of triode Q3, the colelctor electrode of triode Q3 is connected with the positive pole of combustion gas main valve coil L3 and diode D2, the other end of main valve coil L3 is connected with the colelctor electrode of triode Q4 with the negative pole of diode D2, the emitter stage of triode Q4 is connected with power supply, and the base stage of triode Q4 is connected with the pin PA1 of single-chip microcomputer by resistance R 4.The grounded emitter of triode Q1, the colelctor electrode of triode Q1 is connected by the base stage of resistance R 2 with triode Q2, the emitter stage of triode Q2 is connected with power supply, the colelctor electrode of triode Q2 is connected in the coil L2 of dual coil electromagnetic valve and the negative pole of diode D1, the plus earth of the other end of coil L2 and diode D1 by resistance R 1.
Combustion gas main valve 3 is connected on the same gas circuit with dual coil electromagnetic valve 5, and the main valve coil L3 two ends of combustion gas main valve 3 connect the main valve drive output of driving circuit for electromagnetic valve 2 and the output of voltage comparator circuit 4 respectively.
Voltage comparator circuit 4 comprises voltage comparator U, triode Q5, diode D3, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, capacitor C 1, capacitor C 2.Resistance R 5, resistance R 6, resistance R 7 are formed reference voltage circuit with diode D3, one termination 5V power supply of resistance R 5, the other end of resistance R 5 is connected with resistance R 6 with the positive pole of diode D3, the minus earth of diode D3, the other end of resistance R 6 is connected with the inverting input of resistance R 7 and voltage comparator, the other end ground connection of resistance R 7.The in-phase input end of voltage comparator U is connected with the positive terminal of thermocouple 6, voltage comparator U power end and earth terminal connect power supply and ground respectively, the output of voltage comparator U is connected with resistance R 8, resistance R 9, capacitor C 1 respectively, another termination 5V power supply of resistance R 8, the other end ground connection of capacitor C 1, the other end of resistance R 9 is connected with the pin PA2 of capacitor C 2 and single-chip microcomputer and the base stage of triode Q5, the grounded emitter of triode Q5, the colelctor electrode of triode Q5 is connected with the positive pole of diode D2.
Coil L2 one end of thermocouple dual coil electromagnetic valve 1 is connected with the resistance R 3 in the driving circuit for electromagnetic valve 2, and be connected with the colelctor electrode of Q4 in the driving circuit for electromagnetic valve 2 in the other end and the driving circuit for electromagnetic valve 2 of the coil L3 colelctor electrode of Q3 and the output of voltage comparator circuit 4 of coil L3 one end of combustion gas main valve 3 is connected.The input of voltage comparator circuit 4 is connected with thermocouple positive terminal in the thermocouple dual coil electromagnetic valve 1.
Structural representation of the present utility model as shown in Figure 2; the blowout protection circuit is located on the controller 7; controller 7 is connected with combustion gas main valve 3, thermocouple 6, switch 10, blower fan 11 respectively; thermocouple is installed on the burner, and it is the combustion gas gas circuit that pressure-reducing valve 8, combustion gas main valve 3, gas inlet pipe 9, burner 12 are communicated with successively.
During circuit working, single-chip microcomputer pin PA0 provides a high level signal, drive coil L2, the conducting of dual coil electromagnetic valve; Simultaneously, single-chip microcomputer pin PA1 provides a low level signal, and drive coil L3 conducting combustion gas main valve 3 is connected gas circuit thereby open the twice valve.Light a fire successfully enter normal combustion after because thermocouple 6 two ends produce thermoelectrical potential, make coil L1 two ends pressure reduction increase and be driven, thereby can continue to keep the moving state of suction of dual coil electromagnetic valve.Simultaneously, because the increase of the in-phase input end electromotive force of voltage comparator U surpasses the reference voltage of inverting input, high level signal is exported in the output upset of voltage comparator U, thereby can continue to keep the moving state of suction of combustion gas main valve 3.Resistance R 5, R6, R7 and diode D3 form reference voltage circuit, the 5V power supply makes the diode cathode terminal voltage maintain about 0.6 volt by resistance R 5 conducting diode D3 and since the thermoelectrical potential that thermocouple produces generally at several millivolts to tens millivolts, by resistance R 6, the dividing potential drop of R7 can make the reverse input end of voltage comparator U obtain a suitable voltage as reference voltage, and reference voltage is decided according to the thermocouple model.
Behind the output output high level signal of voltage comparator circuit 4, the pin PA2 of single-chip microcomputer obtains the high level input signal, and the pin PA0 of single-chip microcomputer can stop to export high level signal, is kept the operate as normal of magnetic valve by the thermoelectrical potential of thermocouple generation.When accident extinguishing, thermocouple 6 loses thermoelectrical potential, and coil L1 stops to drive, and the dual coil electromagnetic valve cuts out; The in-phase input end voltage drop of voltage comparator U is low to moderate below the reference voltage, and the output of voltage comparator U stops upset, output low level, and coil L3 stops to drive, and combustion gas main valve 3 is closed, and cuts off gas circuit thereby close the twice valve continuously.Single-chip microcomputer obtains the promptly flame-out signal of low level signal that voltage comparator U exports by pin PA2 simultaneously, and then single-chip microcomputer can be controlled the driving that stops blower fan and other ancillary equipment.
Claims (5)
1. the blowout protection circuit of a gas kitchen ranges; it comprises thermocouple dual coil electromagnetic valve (1); driving circuit for electromagnetic valve (2); combustion gas main valve (3); voltage comparator circuit (4); described thermocouple dual coil electromagnetic valve (1) comprises thermocouple (6) and dual coil electromagnetic valve (5); dual coil electromagnetic valve (5) is provided with the first coil L1; the second coil L2; combustion gas main valve (3) is provided with main valve coil L3; main valve coil L3 two ends are connected with the output of voltage comparator circuit (4) and the main valve drive output of driving circuit for electromagnetic valve (2) respectively, it is characterized in that described thermocouple dual coil electromagnetic valve (1) is connected with the dual coil electromagnetic valve drive output of driving circuit for electromagnetic valve (2) and the input of voltage comparator circuit (4) respectively.
2. the blowout protection circuit of gas kitchen ranges according to claim 1; the negative pole end ground connection that it is characterized in that the first coil L1 in the described dual coil electromagnetic valve (5), the second coil L2 and thermocouple (6); the other end of the first coil L1 and the positive terminal of thermocouple are connected with the in-phase input end of voltage comparator circuit (4), and the other end of the second coil L2 is connected with the dual coil electromagnetic valve drive output of driving circuit for electromagnetic valve (2).
3. the blowout protection circuit of gas kitchen ranges according to claim 1 and 2; it is characterized in that described driving circuit for electromagnetic valve (2) comprises triode Q3; triode Q4; diode D2; resistance R 1; resistance R 4; triode Q1; triode Q2; diode D1; resistance R 1; resistance R 2; resistance R 3; resistance R 1 one ends connect the first pin PA0 of single-chip microcomputer in the controller; the other end of resistance R 1 is connected in the base stage of triode Q1 and Q3; the grounded emitter of triode Q3; the colelctor electrode of triode Q3 is connected with the positive pole of main valve coil L3 and diode D2; the other end of main valve coil L3 is connected with the colelctor electrode of triode Q4 with the negative pole of diode D2; the emitter stage of triode Q4 is connected with power supply; the base stage of triode Q4 is connected with the second pin PA1 of single-chip microcomputer by resistance R 4; the grounded emitter of triode Q1; the colelctor electrode of triode Q1 is connected by the base stage of resistance R 2 with triode Q2; the emitter stage of triode Q2 is connected with power supply; the colelctor electrode of triode Q2 is connected in the negative pole of the second coil L2 and diode D1, the plus earth of the other end of the second coil L2 and diode D1 by resistance R 1.
4. the blowout protection circuit of gas kitchen ranges according to claim 1 and 2; it is characterized in that described voltage comparator circuit (4) comprises voltage comparator U; triode Q5; diode D3; resistance R 5; resistance R 6; resistance R 7; resistance R 8; resistance R 9; capacitor C 1; capacitor C 2; one termination power of resistance R 5; the other end of resistance R 5 is connected with resistance R 6 with the positive pole of diode D3; the minus earth of diode D3; the other end of resistance R 6 is connected with the inverting input of resistance R 7 with voltage comparator U; the other end ground connection of resistance R 7; the in-phase input end of voltage comparator U is connected with the positive terminal of thermocouple (6); the output of voltage comparator U respectively with resistance R 8; resistance R 9; capacitor C 1 is connected; another termination power of resistance R 8; the other end ground connection of capacitor C 1; the 3rd pin PA2 of single-chip microcomputer and the base stage of triode Q5 are connected in the other end of resistance R 9 and capacitor C 2 and the controller; the grounded emitter of triode Q5, the colelctor electrode of triode Q5 is connected with the positive pole of diode D2.
5. the blowout protection circuit of gas kitchen ranges according to claim 3; it is characterized in that described voltage comparator circuit (4) comprises voltage comparator U; triode Q5; diode D3; resistance R 5; resistance R 6; resistance R 7; resistance R 8; resistance R 9; capacitor C 1; capacitor C 2; one termination power of resistance R 5; the other end of resistance R 5 is connected with resistance R 6 with the positive pole of diode D3; the minus earth of diode D3; the other end of resistance R 6 is connected with the inverting input of resistance R 7 with voltage comparator U; the other end ground connection of resistance R 7; the in-phase input end of voltage comparator U is connected with the positive terminal of thermocouple (6); the output of voltage comparator U respectively with resistance R 8; resistance R 9; capacitor C 1 is connected; another termination power of resistance R 8; the other end ground connection of capacitor C 1; the 3rd pin PA2 of single-chip microcomputer and the base stage of triode Q5 are connected in the other end of resistance R 9 and capacitor C 2 and the controller; the grounded emitter of triode Q5, the colelctor electrode of triode Q5 is connected with the positive pole of diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201282816U CN201652483U (en) | 2010-03-09 | 2010-03-09 | Flameout protection circuit for gas cooking appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201282816U CN201652483U (en) | 2010-03-09 | 2010-03-09 | Flameout protection circuit for gas cooking appliances |
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| Publication Number | Publication Date |
|---|---|
| CN201652483U true CN201652483U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201282816U Expired - Lifetime CN201652483U (en) | 2010-03-09 | 2010-03-09 | Flameout protection circuit for gas cooking appliances |
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| CN (1) | CN201652483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966983A (en) * | 2011-09-01 | 2013-03-13 | 香港中华煤气有限公司 | Gas appliance |
| CN104728874A (en) * | 2015-03-18 | 2015-06-24 | 浙江新涛电子科技股份有限公司 | Control circuit for flameout of cooking utensils and cooking utensil |
-
2010
- 2010-03-09 CN CN2010201282816U patent/CN201652483U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966983A (en) * | 2011-09-01 | 2013-03-13 | 香港中华煤气有限公司 | Gas appliance |
| CN104728874A (en) * | 2015-03-18 | 2015-06-24 | 浙江新涛电子科技股份有限公司 | Control circuit for flameout of cooking utensils and cooking utensil |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
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| CX01 | Expiry of patent term |