CN110986102A - Igniter with dry-burning-prevention pulse igniter temperature control probe - Google Patents
Igniter with dry-burning-prevention pulse igniter temperature control probe Download PDFInfo
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- CN110986102A CN110986102A CN201911164885.8A CN201911164885A CN110986102A CN 110986102 A CN110986102 A CN 110986102A CN 201911164885 A CN201911164885 A CN 201911164885A CN 110986102 A CN110986102 A CN 110986102A
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- circuit
- dry
- temperature control
- relay
- comparator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/10—Arrangement or mounting of ignition devices
- F24C3/103—Arrangement or mounting of ignition devices of electric ignition devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
Abstract
An igniter provided with a dry-burning-prevention pulse igniter temperature control probe comprises a relay, an ignition circuit, a dry-burning temperature control probe resistor, a thermocouple electromagnetic valve, a first comparator detection circuit, a second comparator detection circuit, a first switch circuit, a second switch circuit, a relay and a third switch circuit, wherein the direction of current flowing through the electromagnetic valve is opposite to the direction of current generated by the thermocouple, and the relay is a double-contact relay; the two input ends of a first comparator detection line are respectively connected with a dry-burning temperature control probe resistor and a comparison divider resistor, the input end of a second comparator detection line is respectively connected with the amplified output of the divider circuit and the first comparator, and the output end of the second comparator is connected with an amplifier and an amplifier output switching valve emitter amplifying circuit; the first switch circuit is connected with an ignition control ignition circuit, and is connected in parallel with a circuit which respectively conducts a triode connected in series on a thermocouple solenoid valve coil and a relay double contact to convert the circuit into a transient circuit, namely, a dry burning point resistor is disconnected.
Description
The technical field is as follows:
the invention relates to a gas cooker pulse igniter provided with a detection of a dry-burning-prevention pulse igniter temperature control probe and a thermocouple electromagnetic valve control circuit, and belongs to the field of gas cooker pulse ignition controllers.
Background art:
the gas cooker with the dry burning prevention function is widely applied to the market, and the matched dry burning prevention pulse ignition controller does not have the detection function of detecting open-circuit faults such as disconnection, welding and damage of the temperature control probe, and the like.
The invention content is as follows:
the invention aims to provide an igniter provided with a dry-burning-proof pulse igniter temperature control probe, which is a gas cooker pulse igniter provided with a detection of the dry-burning-proof pulse igniter temperature control probe and a thermocouple electromagnetic valve control circuit; the method and circuit for changing resistance value of detection test point by switching relay can use a group of voltage comparators to achieve detection of two completely different states on a temperature control probe, namely: the valve closing alarm can detect the valve closing alarm of dry burning overtemperature when the stove is burnt, and can automatically detect whether the temperature control probe is broken and is off-welded, damaged and other open circuit faults when the stove is ignited every time.
The technical scheme of the invention is as follows: an igniter provided with a dry-burning-prevention pulse igniter temperature control probe comprises a relay, an ignition circuit, a dry-burning temperature control probe resistor, a thermocouple electromagnetic valve, a first comparator detection circuit, a second comparator detection circuit, a first switch circuit, a second switch circuit, a relay and a third switch circuit, wherein the direction of current flowing through the electromagnetic valve is opposite to the direction of current generated by the thermocouple, and the relay is a double-contact relay; the two input ends of a first comparator detection line are respectively connected with a dry-burning temperature control probe resistor and a comparison divider resistor, the input end of a second comparator detection line is respectively connected with the amplified output of the divider circuit and the first comparator, and the output end of the second comparator is connected with an amplifier and an amplifier output switching valve emitter amplifying circuit; the first switch circuit is connected with an ignition control ignition circuit, and is connected in parallel with a circuit which respectively conducts a triode connected in series on a thermocouple solenoid valve coil and a relay double contact to convert the circuit into a transient circuit, namely, the R2 dry burning point resistor is disconnected; the circuit for changing the resistance value of the test point of the first comparator by switching the electric appliance after transient state simultaneously comprises three paths of timing control electromagnetic valves for opening and closing the valve and an alarm circuit; when the stove is ignited, the relay circuit is switched on at the same time, the relay switches to change the resistance value circuit of the test point of the first comparator, and the comparator detection circuit simultaneously comprises three paths of timing control electromagnetic valves for opening and closing the valve and an alarm circuit.
The K1 transient state or normal state of the double contacts of the relay is respectively disconnected or connected with a dry-burning temperature control probe (thermistor) and is connected or disconnected with a Q1 emitting electrode of a second switching circuit, so that the Q1 is connected with the negative electrode of a power supply or disconnected; the K2 of the double contacts of the relay simultaneously switches on or off the amplifying circuit Q3 of the second comparator; when the temperature control probe is disconnected, desoldered, damaged and the like, and is opened (the resistance is infinite), the end potential of the first comparator IC1 is higher than the end potential of the positive pole, the first comparator IC1 immediately outputs high potential, so that the buzzer amplifier is conducted to be electrified; the first switch circuit is connected with an ignition control ignition circuit, and is connected in parallel with a circuit which respectively conducts a triode connected in series on a thermocouple solenoid valve coil and a relay double contact to convert the circuit into a transient circuit, namely, the R2 dry burning point resistor is disconnected.
The resistance values of the test points are changed at different positions by changing the contacts of the relays K1 and K2, and the temperature control probe realizes the alarm for detecting open-circuit faults such as disconnection, welding disconnection, damage and the like of the temperature control probe and the valve closing and alarm of the short circuit, dry burning over-temperature state of the connecting line of the temperature control probe by using a group of voltage comparators.
The constant current source is used for a single-coil thermocouple electromagnetic valve, and can also be used for a double-coil thermocouple electromagnetic valve pulse ignition controller and is provided with A, B, C three timing circuits, the output of the three timing circuits is connected with a control electrode of a first switch circuit, the output of the first switch circuit is connected with a control ignition circuit and a relay control circuit in parallel, wherein the A timing is set within 6-8 seconds, the rest B, C timing time is more than the A timing time for about several seconds, after any ABC timing circuit is started, the switch circuit is conducted, the high potential of the switch circuit is connected with a trigger end of the ignition circuit, the parallel high potential enables the relay to be attracted, the double contacts K1 and K2 of the relay are changed to the right, namely, a dry-burning temperature control probe (thermistor) is disconnected, a Q1 emitter is connected, the Q1 is connected with the negative electrode of a power supply, meanwhile, the connection between the Q3 and the output end, When the circuit is opened (the resistance is infinity) due to damage, the voltage of the "+" end of the first comparator IC1 is higher than the voltage of the "-" end, the first comparator IC1 immediately outputs high voltage, so that Q1 and Q2 are conducted, and the Q5 is conducted through D3 to electrify the buzzer to send out alarm sound. If the temperature control probe has no open circuit faults such as disconnection, welding failure, damage and the like, when the resistance value of the temperature control probe is far less than 4.7M, the negative end potential of the comparator is higher than the output low potential of the positive end IC1, the Q1 and the Q2 are cut off and are not conducted, and the buzzer does not give an alarm. At this time, although the comparator IC1 outputs a low potential, the Q3 is not conducted and will not alarm because the base of Q3 is open.
The thermocouple electromagnetic valve closing valve adopts a method that emitter amplification circuits (Q10, Q11 and Q12) are simultaneously conducted and the current flowing direction of a coil of the electromagnetic valve is changed to push the electromagnetic valve to be pulled open for closing the electromagnetic valve effectively, and the emitter amplification circuits (three transistors Q10, Q11 and Q12) are connected in parallel between the coils of the electromagnetic valve, so that the valve can be closed safely even if two triodes are damaged and short-circuited at the same time, and the safety of a circuit is greatly improved.
The rated voltage of the power supply input is DC5V or DC 3V.
The outer casing of the thermocouple electromagnetic valve is connected with the outer casing of the stove, and because the outer casing of the stove of the special line can not be directly connected with the positive and negative of a power supply, an R21 resistor is specially added to a circuit for providing ignition high voltage, and the resistance value is between 1K and 5K.
Has the advantages that: the invention not only can realize reliable closing of the gas valve and alarm once the dry burning overtemperature or short circuit of the temperature control probe occurs in the burning of the stove, but also can detect whether the temperature control probe is broken, detached, damaged and other open-circuit faults in the ignition use of the stove every time, and immediately alarms if the faults occur, thereby greatly improving the reliability and the safety of the dry burning prevention pulse ignition controller. The invention has simple and ingenious conception and strong practicability, and can be widely applied to the technical field of anti-dry-burning pulse ignition controllers.
Aiming at the defects of the existing dry-burning-resistant pulse ignition controller, the invention provides an igniter provided with a dry-burning-resistant pulse igniter temperature control probe, which is a gas cooker pulse igniter provided with a detection of the dry-burning-resistant pulse igniter temperature control probe and a thermocouple electromagnetic valve control circuit; the method and circuit for changing resistance value of detection test point by switching relay can use a group of voltage comparators to achieve detection of two completely different states on a temperature control probe, namely: the pulse ignition controller can not only detect the valve-closing alarm of the dry burning overtemperature when the stove is burnt, but also automatically detect whether the temperature control probe is broken, disconnected and welded, damaged and other open-circuit faults when the stove is ignited each time, and immediately alarm if the open-circuit faults such as broken, disconnected and welded, damaged and the like are found, so that a user is reminded that the dry burning prevention function of the furnace end is lost and the faults are timely eliminated, and the safety and the reliability of the stove are greatly improved.
Description of the drawings:
fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is a partial schematic diagram of the present invention.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to fig. 2.
When the stove switch pulse ignition controller A, B, C is switched on, three timing circuits are started simultaneously, wherein the A timing is set within 6-8 seconds, the rest B, C timing time is about a few seconds longer than A timing time, when A timing circuit is started, the first switch circuit Q16 is conducted, the high potential of the relay is used for controlling an ignition circuit through D6 and R23 on one path, Q13 is conducted through D7 and R20 on one path to enable the relay to be attracted, double contacts K1 and K2 of the relay are changed to the right, namely, the resistance value of the R2 dry burning point is cut off, the emitter of the Q1 is switched on, the Q1 is switched on the negative pole of the power supply, the connection between the Q3 and the output end of the comparator is cut off, when the temperature control probe is disconnected, is not welded, is damaged and the like, and is opened, the end potential of the positive terminal (resistance ∞) of the comparator IC1 is higher than the end potential of the negative terminal, the comparator IC1 immediately outputs high potential, so that the Q1 and the Q2 are conducted, and the Q5 is conducted through the D3 to electrify the buzzer to send out alarm sound. If the temperature control probe has no open circuit faults such as disconnection, welding failure, damage and the like, when the resistance value of the temperature control probe is far less than 4.7M, the negative end potential of the comparator is higher than the output low potential of the positive end IC1, the Q1 and the Q2 are cut off and are not conducted, and the buzzer does not give an alarm. At this time, although the comparator IC1 outputs a low potential, the Q3 is not conducted and will not alarm because the base of Q3 is open.
When the gas cooker is ignited, the circuit is provided with three paths (A, B, C) of timing circuits, the first switch circuit is conducted and connected in parallel to respectively conduct triodes Q6, Q7, Q8 and Q9 which are connected in series on a coil of a thermocouple electromagnetic valve, so that the thermocouple electromagnetic valve is electrified and attracted, an air valve is opened to enable the gas cooker to be ignited, and the gas cooker burns normally. After normal combustion, the external power supply of the thermocouple electromagnetic valve does not work (depending on the thermocouple current, which is an existing pneumatic rod meter), at the moment, the relay is reset at the left end, when the cooker is used during combustion, once the temperature control probe detects that the temperature of the bottom of the cooker is greater than a set value (during dry combustion), namely the resistance value of the temperature control probe is smaller than the sum of R1 and R2, the negative potential is immediately output by the IC1 at the minus end of the first comparator, the Q3 is immediately conducted, and the low potential is output by the IC2 to conduct the Q4 and conduct the Q10 and the Q12 through the C1 and the resistors R11 and D1 in one path; the other path of the current is used for conducting Q11 through a positive pulse signal which is formed by capacitors C2, D4, R17, R18, R19, Q14 and Q15 and is about 1 second, at the moment, because the direction of the current flowing through the electromagnetic valve is opposite to the direction of the current generated by the thermocouple and the current value of the current is far larger than the current generated by the thermocouple, the electromagnetic valve is pushed open and closed under the action of a spring, an air source is cut off, and simultaneously, after the Q3 is conducted, the high potential of the electromagnetic valve conducts the Q5 through D2 and R16 to enable the buzzer to be powered on to give out a buzzing alarm. When the resistance value of the temperature control probe is larger than the sum of R1 and R2 after the stove is flamed out, the comparator reversely rotates to output high potential, and the Q3 stops the buzzer, loses power and stops alarming. The product of the application is easy to manufacture, simple and reliable in structure and strong in practicability, and can be widely applied to the technical field of dry burning prevention pulse igniters.
Claims (6)
1. An igniter provided with a dry-burning-resistant pulse igniter temperature control probe is characterized by comprising a relay, an ignition circuit, a dry-burning temperature control probe resistor, a thermocouple electromagnetic valve, a first comparator detection circuit, a second comparator detection circuit, a first switch circuit, a second switch circuit, a relay and a third switch circuit, wherein the direction of current flowing through the electromagnetic valve is opposite to the direction of current generated by the thermocouple, and the relay is a double-contact relay; the two input ends of a first comparator detection line are respectively connected with a dry-burning temperature control probe resistor and a comparison divider resistor, the input end of a second comparator detection line is respectively connected with the amplified output of the divider circuit and the first comparator, and the output end of the second comparator is connected with an amplifier and an amplifier output switching valve emitter amplifying circuit; the first switch circuit is connected with an ignition control ignition circuit, and is connected in parallel with a circuit which respectively conducts a triode connected in series on a thermocouple solenoid valve coil and a relay double contact to convert the circuit into a transient circuit, namely a dry burning point resistor is disconnected; the circuit for changing the resistance value of the test point of the first comparator by switching the electric appliance after transient state simultaneously comprises three paths of timing control electromagnetic valves for opening and closing the valve and an alarm circuit; when the stove is ignited, the relay circuit is switched on at the same time, the relay switches to change the resistance value circuit of the test point of the first comparator, and the comparator detection circuit simultaneously comprises three paths of timing control electromagnetic valves for opening and closing the valve and an alarm circuit;
the K1 transient state or the normal state of the double contacts of the relay are respectively disconnected or connected with the dry-burning temperature control probe and the Q1 emitter of the second switch circuit is connected or disconnected, so that the Q1 is connected with the negative electrode of the power supply or disconnected; the K2 of the double contacts of the relay simultaneously switches on or off the amplifying circuit Q3 of the second comparator; when the temperature control probe is disconnected and is subjected to open circuit such as welding, damage and the like, the end potential of the first comparator IC1 is higher than the end potential of the first comparator IC1 outputs high potential immediately, so that the buzzer amplifier is conducted to be powered on; the first switch circuit is connected with an ignition control ignition circuit, and is connected in parallel with a circuit which respectively conducts a triode connected in series on a thermocouple solenoid valve coil and a relay double contact to convert the circuit into a transient circuit, namely, a dry burning point resistor is disconnected.
2. The igniter provided with the dry-burning prevention pulse igniter temperature control probe according to claim 1, wherein the resistance value of the test point is changed at different positions by changing the contacts of the relays K1 and K2, and the temperature control probe realizes the alarm for detecting open-circuit faults such as disconnection, welding-off, damage and the like of the temperature control probe and the valve closing and alarm for detecting the short circuit of the connecting line of the temperature control probe and the dry-burning over-temperature state by using a group of voltage comparators.
3. The igniter provided with the temperature control probe of the dry-burning prevention pulse igniter as claimed in claim 1, wherein the constant current source is used for a single-coil thermocouple electromagnetic valve, the pulse ignition controller for the double-coil thermocouple electromagnetic valve is provided with A, B, C three-way timing circuits, the output of the three-way timing circuit is connected with the control electrode of the first switch circuit, the output of the first switch circuit is connected with the control ignition circuit and the relay control circuit in parallel, wherein A timing is set within 6-8 seconds, and the rest B, C timing time is more than A timing time for about several seconds.
4. The igniter provided with the temperature control probe of the dry-burning prevention pulse igniter as claimed in claim 1, wherein a thermocouple solenoid valve casing is connected with a cooker casing.
5. The igniter provided with the temperature control probe of the dry-burning prevention pulse igniter as claimed in claim 1, wherein an R21 resistor having a resistance value of 1K to 5K is connected in series to the circuit for supplying the ignition high voltage.
6. The igniter provided with the temperature control probe of the dry-fire prevention pulse igniter as claimed in claim 1, wherein the constant current source is used for a single-coil thermocouple solenoid valve or for a double-coil thermocouple solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911164885.8A CN110986102A (en) | 2019-11-25 | 2019-11-25 | Igniter with dry-burning-prevention pulse igniter temperature control probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911164885.8A CN110986102A (en) | 2019-11-25 | 2019-11-25 | Igniter with dry-burning-prevention pulse igniter temperature control probe |
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| Publication Number | Publication Date |
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| CN110986102A true CN110986102A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911164885.8A Pending CN110986102A (en) | 2019-11-25 | 2019-11-25 | Igniter with dry-burning-prevention pulse igniter temperature control probe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051765A (en) * | 2020-08-13 | 2020-12-08 | 浙江达峰科技有限公司 | Dry burning prevention control circuit system and method for integrated cooker |
| CN113108311A (en) * | 2021-04-14 | 2021-07-13 | 南京天富实业有限公司 | Pulse ignition controller with child lock function |
| CN113685852A (en) * | 2021-07-22 | 2021-11-23 | 安徽翰翔智能技术有限公司 | Empty burning prevention control device |
-
2019
- 2019-11-25 CN CN201911164885.8A patent/CN110986102A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051765A (en) * | 2020-08-13 | 2020-12-08 | 浙江达峰科技有限公司 | Dry burning prevention control circuit system and method for integrated cooker |
| CN113108311A (en) * | 2021-04-14 | 2021-07-13 | 南京天富实业有限公司 | Pulse ignition controller with child lock function |
| CN113108311B (en) * | 2021-04-14 | 2023-09-12 | 南京天富实业有限公司 | Pulse ignition controller with child lock function |
| CN113685852A (en) * | 2021-07-22 | 2021-11-23 | 安徽翰翔智能技术有限公司 | Empty burning prevention control device |
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