CN1208577C - Rapid safety protector of gas device - Google Patents
Rapid safety protector of gas device Download PDFInfo
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- CN1208577C CN1208577C CN 03116125 CN03116125A CN1208577C CN 1208577 C CN1208577 C CN 1208577C CN 03116125 CN03116125 CN 03116125 CN 03116125 A CN03116125 A CN 03116125A CN 1208577 C CN1208577 C CN 1208577C
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Abstract
The present invention relates to a fast safety protection device for a gas utensil, which comprises an electromagnetic valve with a main coil and an auxiliary coil, a thermocouple, a switch and an ignition needle, wherein the switch and the ignition needle are used for ignition; the other end of the main coil grounds; both ends of the auxiliary coil, the switch and the ignition needle are respectively connected with corresponding pins of a controller; the controller comprises an electromagnetic valve instant suction circuit, an electromagnetic valve instant cutting circuit, a pulse ignition timing circuit, a high-pressure pulse ignition circuit and a flame ion inducing circuit connected with an induction needle positioned on the burner. Due to the adoption of the structure, while in ignition or accidental fire extinguishment, positive or reverse current is inputted to the auxiliary coil of the electromagnetic valve to cause the electromagnetic valve to be rapidly attracting or disconnected; while in the working process, the thermocouple attracts the electromagnetic valve; thus, the present invention has the advantages of high ignition speed, short attracting time, high sensitivity, less power consumption and low cost and is capable of singly controlling burners; in addition, the present invention also has the advantages of good interference immunity, double protection functions and safer and more reliable operation.
Description
Technical field
The present invention relates to a kind of safety guard of combustion gas tool, especially refer to a kind of doublewound combustion gas tool safety guard that has.
Background technology
The safety guard that existing combustion gas tool adopts generally has three kinds: a kind of is common thermojunction type flame-out protection device, it comprises magnetic valve and links to each other with electromagnetic valve coil one end and be fixed on thermocouple on the burner, when manual ignition, thermocouple is in and is subjected to thermogenetic electromotive force to insert electromagnetic valve coil in the flame scope, produce magnetic field and make the magnetic valve action, air valve is opened, and the normal combustion of burner is kept in ducted combustion gas conducting; In case during the detected fray-out of flame of thermocouple, the electromotive force at thermocouple two ends drops to zero, the electromagnetic valve coil dead electricity resets under the spring action of self, and pipeline stops air feed, and burner is flame-out.Though this protective device can play the effect that prevents that combustion gas from escaping to the accident extinguishing of burner, but because thermocouple itself has inertia, promptly when manual ignition, after flame combustion 3 seconds or longer time, could produce enough big electric current and make the magnetic valve adhesive, certainly will also need after the igniting like this, so use unusual inconvenience with hand push switch more than 3 seconds always; And meet accident when stopping working, then because the cooling velocity of thermocouple is slower, in this process, combustion gas is in leak condition always, and this will produce very big injury to human body.For this reason, people design a kind of band double winding gas combustion range flameout protector, as the patent No. is a kind of scheme that 92200875.2 Chinese utility model patent " double winding gas combustion range flameout protector " comes to this, it comprises the magnetic valve of band actuating coil and actuating coil, the switch that links to each other and be installed in the thermocouple on the cooker burner and be used to light a fire with an end of actuating coil, the igniting pin, one end of actuating coil links to each other with pulse igniter, and the other end common ground of actuating coil and actuating coil, moment when pressing the switch sparking, the operating current of pulse igniter enters the starting coiling, make the magnetic valve can adhesive in the heat lag time of thermocouple, kept the unimpeded of gas circuit; Meanwhile, along with the raising of burner temperature, the electromotive force of thermocouple rises, and reaches out the valve electromotive force, before the starting time finishes, promptly electric current is provided and keeps the unimpeded of gas circuit, so this scheme has solved the defective of lighting a fire in first kind of scheme well to actuating coil.But owing to the wherein end of actuating coil with actuating coil is connected to, when the pulse igniter input signal, can produces and disturb, be prone to maloperation actuating coil; And meeting accident when flame-out, its operating characteristic has identical defective with common thermojunction type flame-out protection device; Moreover it is driven valve, closes the speed of valve and the instructions for use that sensitivity still can't satisfy people.The third combustion gas tool protective device appears again on the market for this reason, it is the ion induction type flame-out protection device, it is to utilize the charging property of flame to realize safeguard protection, in this scheme, comprise inductive needle, pulse igniter, ion sensor circuit module and only with the magnetic valve of actuating coil, when pressing switch, pulse igniter discharges, and ion sensor circuit module output current makes the magnetic valve adhesive keep gas circuit unimpeded simultaneously, enters duty after the flame ignition; When accident was flame-out, the charging property of flame disappeared immediately, and inductive needle can reach signal flame ion sensor circuit module immediately, cut off the power supply of magnetic valve after handling through signal immediately, made the closed electromagnetic valve gas circuit.Because it has adopted inductive needle and ion sensor circuit module, therefore drive valve and close valve speed fast, but sensitivity is high and Based Intelligent Control, so it has solved the defective in second kind of scheme well.But because this kind magnetic valve is self-priming magnetic valve, volume is big, cost is high and can't be installed on each valve, thereby can not control each burner separately, and promptly a burner extinguishes then and all extinguishes; In addition, in use, because magnetic valve keeps attracting state by the power supply of power supply always, so power consumption is big; Moreover the interference free performance of ion sensor circuit is relatively poor, therefore also maloperation can occur, and influence its use.
Summary of the invention
Technical problem to be solved by this invention is the defective that overcomes prior art, a kind of fast quick-opening valve is provided, closes valve, anti-interference is good and can control each burner, little power consumption, combustion gas tool safety guard that cost is low again separately.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this combustion gas tool fast and safely protective device comprises the magnetic valve of being with main coil and ancillary coil; the switch that links to each other and be installed in the thermocouple on the burner and be used to light a fire with main coil one end; the igniting pin; described main coil other end ground connection; it is characterized in that: the two ends of described magnetic valve ancillary coil; switch links to each other with the respective foot of a controller respectively with the igniting pin; described controller comprises again inhales circuit in magnetic valve wink; magnetic valve hit circuit; the pulse firing timing circuit; the high-voltage pulse firing circuit be positioned at burner on the flame ion sensor circuit that links to each other of inductive needle; inhale the closure signal of circuit described magnetic valve wink according to switch; in the time that the pulse firing timing circuit is set; the forward current that magnetic valve is opened is provided to ancillary coil; this switch closure signals is in the setting-up time of pulse firing timing circuit simultaneously; supply igniting stylus printer fire through the vibration of high-voltage pulse firing circuit; the signal that described flame ion sensor circuit collects by inductive needle is judged that burner has or not and is lighted and stop sparking according to igniting signal control igniting pin, and described magnetic valve hit circuit provides the reversing the current that makes the magnetic valve hit according to the flame-out signal that described flame ion sensor circuit draws to ancillary coil.
Described magnetic valve wink inhale circuit and can comprise comparator IC1, diode D4, resistance R 14, R18 and triode Q6, Q9, the anode of the emitter stage of described triode Q6 and comparator IC1 respectively with the positive pole that leads to after an end of switch links to each other in power supply, the colelctor electrode of described triode Q6, the emitter stage of Q9 links to each other with the two ends of ancillary coil respectively, the base stage of the two is then respectively by resistance R 14, be connected in the input of diode D4 behind the R18 jointly, the output of diode D4 then links to each other with described comparator IC1 output, and the negative terminal of comparator IC1 then links to each other with pulse timing circuit.
Described magnetic valve hit circuit can comprise triode Q8, Q7 and resistance R 15, R19, the emitter stage of described triode Q8 links to each other with positive source, the colelctor electrode of described triode Q8 links to each other with the two ends of ancillary coil respectively with the emitter stage of Q7, and the base stage of the two links to each other with the output of flame ion sensor circuit respectively with by resistance R 19, R15.
Described fire falls between ion sensor circuit and the described magnetic valve hit circuit can be provided with the delay circuit that time-delay disconnects magnetic valve.
Described delay circuit can comprise capacitor C 8, resistance R 35, R38, R40, R41 and triode Q16, Q18, Q19, Q20, the base stage of described triode Q16, the colelctor electrode of Q18, the emitter stage of Q19 links to each other with power supply by switch respectively, the colelctor electrode of described triode Q16 links to each other with the base stage of described triode Q18 by resistance R 38, the colelctor electrode of described triode Q18 links to each other with the base stage of triode Q19 by resistance R 40, the colelctor electrode of described triode Q19 links to each other with the base stage of described triode Q20 by resistance R 41, the colelctor electrode of described triode Q20 links to each other with the hit circuit, and described triode Q18, the emitter stage of Q20 links to each other with the negative terminal of capacitor C 8 after then linking to each other, and the anode of described capacitor C 8 then falls into ion sensor circuit output with fire and links to each other and be connected by the emitter stage of resistance R 35 with triode Q16.
Compared with prior art, the invention has the advantages that:, when igniting, give magnetic valve ancillary coil input forward current owing to adopt the safety guard of said structure, make magnetic valve adhesive fast, and during accident extinguishing, utilize the rapidity of flame ion sensor circuit, give magnetic valve ancillary coil input reversing the current, magnetic valve is disconnected fast, therefore its speed of ignition is fast, and pickup time is short, and sensitivity height, safe and reliable; And in the course of the work, the electromotive force adhesive magnetic valve that then relies on the thermocouple heating to produce, thus in whole process, the little power consumption of magnetic valve, cost is low, can each burner be controlled separately again; In addition, because the ground termination points of ancillary coil and main coil is separated, can prevent of the interference of other signal of telecommunication on the one hand, in order to avoid maloperation occurs to main coil; On the other hand; the flame ion sensor circuit was broken down or maloperation; also can rely on the decline of thermocouple electromotive force, the dead electricity of magnetic valve main coil to protect; therefore the present invention has reached the purpose of duplicate protection; using can be more safe, reliable, thereby can satisfy the instructions for use of people to the combustion gas tool.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention;
Fig. 2 is the structural representation of dual coil electromagnetic valve among the present invention;
Fig. 3 is the electric function schematic diagram of middle controller of the present invention;
Fig. 4 is a workflow schematic diagram of the present invention;
Fig. 5 is the electric wiring schematic diagram of middle controller of the present invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, the combustion gas tool in the present embodiment is the gas-cooker that has two burners, and the operation principle of the multi-functional protective device fast and safely of every burner outfit is identical, existing one of them operation principle of only narrating.It comprises band main coil 3 and ancillary coil 4 magnetic valve 2, be installed in the thermocouple 1 on the cooker burner and the switch 5 that is used to light a fire, igniting pin 8 and inductive needle 7, one end of described main coil 3 links to each other with thermocouple 1, other end ground connection, the two ends of ancillary coil 4 then by lead and controller 6 1., 2. pin links to each other, switch 5 and controller 6 3., 4. pin links to each other, power supply, earth connection and controller 6 5., 6., 7. pin links to each other, igniting pin 8, inductive needle 7 then with controller 6 8., 9. pin links to each other.
As shown in Figure 3, described controller comprises inhales circuit, magnetic valve hit circuit, pulse firing timing circuit, high-voltage pulse firing circuit and flame ion sensor circuit in magnetic valve wink, described high-voltage pulse firing circuit is made up of transistor oscillating circuit and the thyristor gating circuit that is attached thereto again, blow and make inductive needle unnecessary flame-out for fear of the accident of flame, in described magnetic valve hit circuit, being provided with the delay circuit that time-delay disconnects magnetic valve from what fall into to produce.Its workflow is inhaled the closure signal of circuit according to switch described magnetic valve wink as shown in Figure 4, in the time that the pulse firing timing circuit is set, provides forward current to ancillary coil, and magnetic valve is opened; This switch closure signals is in the time that the pulse firing timing circuit is set simultaneously, to thyristor gating circuit, supply igniting stylus printer fire through the transistor oscillating circuit, if burner is not lighted in the time that ignition timing circuit is set, the stylus printer fire of then lighting a fire stops, simultaneously, magnetic valve wink inhale circuit and quit work yet, ancillary coil does not have forward current, air valve disconnects, and controller is in holding state; If inductive needle detects burner and lighted, the then fiery ion sensor circuit control igniting pin that falls into stops discharge, and the forward current of ancillary coil disappeared in the time Mo of pulse firing timing circuit setting, at this moment, thermocouple is heated, the main coil adhesive, and gas-cooker carries out normal duty; When inductive needle detects flame-out or during from flame, described magnetic valve hit circuit, provides reversing the current and magnetic valve is disconnected to ancillary coil after the time that delay circuit is set according to the flame-out signal that draws of flame ion sensor circuit; If in the time that delay circuit is set, flame-out blackout, then magnetic valve hit circuit does not provide reversing the current to ancillary coil, and gas-cooker still carries out normal duty.
The concrete line map of present embodiment is seen Fig. 5, described magnetic valve wink inhale circuit and comprise comparator IC1, diode D4, resistance R 14, R18 and triode Q6, Q9, the anode of the emitter stage of described triode Q6 and comparator IC1 respectively with the positive pole that leads to after an end of switch 5 links to each other in power supply, the colelctor electrode of described triode Q6, the emitter stage of Q9 links to each other with the two ends of ancillary coil 4 respectively, the base stage of the two is then respectively by resistance R 14, be connected in the input of diode D4 behind the R18 jointly, the output of diode D4 then links to each other with the output of comparator IC1, and the negative terminal of comparator IC1 then links to each other with electrochemical capacitor C5 negative terminal in the pulse timing circuit.
Described magnetic valve hit circuit comprises triode Q8, Q7 and resistance R 15, R19, the emitter stage of described triode Q8 links to each other with positive source, the colelctor electrode of described triode Q8 links to each other with the two ends of ancillary coil 4 respectively with the emitter stage of Q7, and the base stage of the two respectively with the linking to each other of colelctor electrode by the triode Q20 in resistance R 19, R15 and the delay circuit.
Described pulse firing timing circuit is made up of with R11 capacitor C 5.
Transistor oscillating circuit in the described transformation pulse firing circuit is made up of transformer T2, diode D1, capacitor C 1 etc.Thyristor gating circuit is made up of controllable silicon VS, transformer T1 etc.
Described flame ion sensor circuit is made up of comparator IC2, triode Q15 etc.
Described delay circuit comprises capacitor C 8, resistance R 35, R38, R40, R41 and triode Q16, Q18, Q19, Q20, the base stage of described triode Q16, the colelctor electrode of Q18, the emitter stage of Q19 links to each other with power supply by switch 5 respectively, the colelctor electrode of described triode Q16 links to each other with the base stage of described triode Q18 by resistance R 38, the colelctor electrode of described triode Q18 links to each other with the base stage of triode Q19 by resistance R 40, the colelctor electrode of described triode Q19 links to each other with the base stage of described triode Q20 by resistance R 41, and described triode Q18, the emitter stage of Q20 links to each other with the negative terminal of capacitor C 8 after then linking to each other, and the anode of described capacitor C 8 then falls into ion sensor circuit output with fire and links to each other and be connected by the emitter stage of resistance R 35 with triode Q16.
Its operation principle is as follows: when connecting switch 5, to electrochemical capacitor C5 charging, when beginning to charge, comparator IC1 negative terminal current potential is than positive terminal potential height by R11 for power supply, comparator is exported electronegative potential immediately, this electronegative potential makes triode Q6, Q9 conducting by diode D4, resistance R 14, the R18 base stage to triode Q6, Q9, flows into forward current in the magnetic valve ancillary coil 4, so magnetic valve 2 moment adhesive, air valve is opened, ducted combustion gas conducting; Because during the charging beginning, burner also is provided with and lights, so inductive needle 7 is visited less than fire, the positive terminal potential of comparator IC2 is higher than the negative terminal current potential, comparator output high potential is to the base stage of triode Q5, make its conducting, like this, pass through triode Q5 in the low level of comparator IC1, resistance tube R1 makes triode Q1 conducting, and passes through the oscillating voltage of hectovolt in the oscillation transformer T2 generation, this voltage charges to capacitor C 1 by triode D1, make capacitor C 1 two ends be filled with the voltage of hectovolt, make capacitor C 1 discharge by controllable silicon VS circuits for triggering again, by boosting of transformer T1, the pulsed discharge high pressure that obtains volts up to ten thousand lights kitchen range to the pin 8 of lighting a fire.
When the igniting of the forward current of above-mentioned ancillary coil 4 and igniting pin 8 continues 10 seconds not, when kitchen range are not lighted yet, because the capacitor C 5 of this moment is recharged, when making the positive terminal potential of comparator IC1 be higher than the negative terminal current potential, comparator IC1 exports high potential, triode Q6, Q9 are ended, the ancillary coil 4 no forward currents of magnetic valve pass through, magnetic valve 2 is closed under the restoring force effect of self spring, the air valve closure, and ducted combustion gas is turn-offed, simultaneously, triode Q1 is cut off, and the oscillating voltage of the supreme hectovolt of oscillation transformer T2 produces, and igniting pin 8 stops sparking.
When the igniting of the forward current of above-mentioned ancillary coil 4 and igniting pin 8 continued in 10 seconds, kitchen range are lighted, inductive needle 7 is visited fire and is fallen into, because ion stream unilateal conduction is arranged in the flame, make comparator IC2 negative terminal current potential be higher than positive terminal potential, comparator IC2 output this moment electronegative potential, triode Q5 ends, the oscillating voltage of the supreme hectovolt of oscillation transformer T2 produces, and igniting pin 8 stops sparking.And in 10 seconds, still pass to forward current in the ancillary coil 4, at 10 seconds when last, because the effect of capacitor C 5, forward current in the ancillary coil is disappeared, and the voltage that this moment, thermocouple 1 was produced by fiery sunken heating back pass through the main coil 3 of magnetic valve 2, makes magnetic valve 2 normal adhesives.
When normal combustion, inductive needle 7 is visited fire and is fallen into, make comparator IC2 negative terminal current potential be higher than positive terminal potential, comparator IC2 exports electronegative potential, this electronegative potential ends triode Q15, power supply charges to electrochemical capacitor C8 by resistance R 32, diode D10, after electrochemical capacitor C8 is full of electricity, because triode Q16 ends, triode Q18, Q19, Q20 are all ended, ending of triode Q20 also ends triode Q7, Q8, and no reversing the current passes through in the ancillary coil 4 of magnetic valve like this, and can not influence the normal adhesive of magnetic valve main coil 3.
When the sunken accident of fire is extinguished, owing to inductive needle 7 is visited and is not had ion stream less than fire and pass through, at this moment, the positive terminal potential of comparator IC2 is higher than the negative terminal current potential, comparator IC2 exports high potential immediately, make triode Q15 by resistance R 31, the Q16 conducting, under the discharge process of electrochemical capacitor C8, by resistance R 35, triode Q16, resistance R 38 makes triode Q18 conducting, the conducting of triode Q18 makes triode Q19 conducting by resistance R 40, and the conducting of triode Q19 makes triode Q20 conducting by resistance R 41, the conducting of triode Q20 is respectively by resistance R 15, R19 makes three utmost points and Q7, the Q8 conducting, give the magnetic valve ancillary coil 4 input reversing the currents after 4 seconds, the forward current that this reversing the current is produced much larger than thermocouple 1 normal combustion, like this, just, counter current offsets and is closed under the spring action of back by magnetic valve 2 self, the air valve closure, ducted combustion gas is turn-offed, and controller 6 is in holding state.
Claims (5)
1; a kind of combustion gas tool is protective device fast and safely; it comprises the magnetic valve (2) of band main coil (3) and ancillary coil (4); the switch (5) that links to each other and be installed in the thermocouple (1) on the burner and be used to light a fire with main coil (3) one ends; igniting pin (8); described main coil (3) other end ground connection; it is characterized in that: described magnetic valve ancillary coil (3) two ends; switch (5) links to each other with the respective foot of a controller (6) respectively with igniting pin (8); described controller (6) comprises again inhales circuit in magnetic valve wink; magnetic valve hit circuit; the pulse firing timing circuit; the high-voltage pulse firing circuit be positioned at burner on the flame ion sensor circuit that links to each other of inductive needle (7); inhale the closure signal of circuit described magnetic valve wink according to switch (5); in the time that the pulse firing timing circuit is set; the forward current that magnetic valve (2) is opened is provided to ancillary coil (4); this switch (5) closure signal is in the setting-up time of pulse firing timing circuit simultaneously; strike sparks for igniting pin (8) through the vibration of high-voltage pulse firing circuit; the signal that described flame ion sensor circuit collects by inductive needle (7) is judged that burner has or not and is lighted and stop sparking according to igniting signal control igniting pin (8), and described magnetic valve hit circuit provides the reversing the current that makes magnetic valve (2) hit according to the flame-out signal that described flame ion sensor circuit draws to ancillary coil (4).
2; combustion gas tool according to claim 1 is protective device fast and safely; it is characterized in that inhaling in described magnetic valve wink circuit and comprise comparator IC1; diode D4; resistance R 14; R18 and triode Q6; Q9; the anode of the emitter stage of described triode Q6 and comparator IC1 respectively with the positive pole that leads to after an end of switch (5) links to each other in power supply; the colelctor electrode of described triode Q6; the emitter stage of Q9 links to each other with the two ends of ancillary coil (4) respectively; the base stage of the two is then respectively by resistance R 14; be connected in the input of diode D4 behind the R18 jointly; the output of diode D4 then links to each other with described comparator IC1 output, and the negative terminal of comparator IC1 then links to each other with pulse timing circuit.
3, combustion gas tool according to claim 1 protective device fast and safely; it is characterized in that described magnetic valve hit circuit comprises triode Q8, Q7 and resistance R 15, R19; the emitter stage of described triode Q8 links to each other with positive source; the colelctor electrode of described triode Q8 links to each other with the two ends of ancillary coil (4) respectively with the emitter stage of Q7, and the base stage of the two links to each other with the output of flame ion sensor circuit respectively with by resistance R 19, R15.
4, combustion gas tool according to claim 1 protective device fast and safely is characterized in that described fire falls into the delay circuit that being provided with time-delay disconnection magnetic valve (2) between ion sensor circuit and the described magnetic valve hit circuit.
5; combustion gas tool according to claim 4 is protective device fast and safely; it is characterized in that described delay circuit comprises capacitor C 8; resistance R 35; R38; R40; R41 and triode Q16; Q18; Q19; Q20; the base stage of described triode Q16; the colelctor electrode of Q18; the emitter stage of Q19 links to each other with power supply by switch (5) respectively; and the colelctor electrode of triode Q16 links to each other with the base stage of triode Q18 by resistance R 38; the colelctor electrode of described triode Q18 links to each other with the base stage of triode Q19 by resistance R 40; the colelctor electrode of described triode Q19 links to each other with the base stage of described triode Q20 by resistance R 41; the colelctor electrode of described triode Q20 links to each other with the hit circuit; and described triode Q18; the emitter stage of Q20 links to each other with the negative terminal of capacitor C 8 after then linking to each other, and the anode of described capacitor C 8 then falls into ion sensor circuit output with fire and links to each other and be connected by the emitter stage of resistance R 35 with triode Q16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116125 CN1208577C (en) | 2003-04-03 | 2003-04-03 | Rapid safety protector of gas device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116125 CN1208577C (en) | 2003-04-03 | 2003-04-03 | Rapid safety protector of gas device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1439849A CN1439849A (en) | 2003-09-03 |
| CN1208577C true CN1208577C (en) | 2005-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03116125 Expired - Fee Related CN1208577C (en) | 2003-04-03 | 2003-04-03 | Rapid safety protector of gas device |
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| CN (1) | CN1208577C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445645C (en) * | 2005-09-12 | 2008-12-24 | 陈伟明 | Automatic gas safety protecting method |
| CN101153718B (en) * | 2006-09-30 | 2010-12-15 | 海尔集团公司 | Method and device for preventing dry-fire of gas combustion range |
| WO2009079931A1 (en) * | 2007-12-21 | 2009-07-02 | Shenzhen H & T Intelligent Co., Ltd | Control system for a gas cooker |
| CN102538030B (en) * | 2012-02-24 | 2014-08-13 | 宁波方太厨具有限公司 | Ignition and braking device of gas cooker |
| CN104515158B (en) * | 2013-09-26 | 2017-06-30 | 海尔集团公司 | Intelligent gas-burning stove and its control method |
| CN104949163B (en) * | 2015-03-17 | 2017-05-10 | 浙江新涛电子科技股份有限公司 | Flameout control circuit of cooker and cooker utilizing flameout control circuit |
| ES2668231B1 (en) * | 2016-11-16 | 2019-02-25 | Copreci S Coop | Gas appliance |
| CN109386849A (en) * | 2018-09-29 | 2019-02-26 | 华帝股份有限公司 | Flameout protection device and manufacturing method |
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2003
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| CN1439849A (en) | 2003-09-03 |
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