CN210511788U - Thermocouple electromagnetic valve instant suction type single needle sensing gas cooker pulse ignition controller - Google Patents
Thermocouple electromagnetic valve instant suction type single needle sensing gas cooker pulse ignition controller Download PDFInfo
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- CN210511788U CN210511788U CN201920745563.1U CN201920745563U CN210511788U CN 210511788 U CN210511788 U CN 210511788U CN 201920745563 U CN201920745563 U CN 201920745563U CN 210511788 U CN210511788 U CN 210511788U
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Abstract
The utility model provides a thermocouple solenoid valve transient absorption type single needle sensing gas cooking utensils pulse ignition controller, includes DC power supply, ignition switch, ignition module, thermocouple solenoid valve, constant current source module, single needle sensing module, first time delay switch circuit, second time delay switch circuit, third time delay switch circuit, first short time delay switch circuit and second short time delay switch circuit to and first charging capacitor, second charging capacitor and third charging capacitor: the input end of the first delay circuit is connected with the negative electrode of the direct-current power supply, and the first output end of the first delay circuit is connected with the input end of the constant-current source module; the second output end is connected with the input end of the ignition module through a diode. The input end of the third delay switch circuit is connected to one end of the ignition switch through a third charging capacitor, and the output end of the third delay switch circuit is connected with the second input end of the constant current source module.
Description
Technical Field
The utility model relates to a gas cooking utensils ignition control safety protection technical field especially can adopt ordinary single coil thermocouple solenoid valve to reach zero second and open the valve and adopt ignition needle and response to close a needle method and reach the pulse ignition controller that ignites promptly and stop to strike sparks.
Background
At present, the safe household gas cooker with flameout protection in the market of China mostly adopts a thermocouple electromagnetic valve type safe flameout protection device, and the matched pulse ignition controllers can be divided into two types: one is a common type pulse ignition controller, and the other is a single or double coil instantaneous suction type (zero second open valve) pulse ignition controller.
The common pulse ignition controller is only responsible for ignition in the gas cooker, has no other additional functions, and when the gas cooker is used, a user firstly presses a switch to ignite the fire and then cannot release the hand immediately, and also needs to press a few seconds to enable a thermocouple probe to be attracted by a fire heating electromagnetic valve, otherwise, the gas cooker cannot be normally ignited.
The instantaneous suction type pulse ignition controller supplies power to the secondary coil of the thermocouple electromagnetic valve for 6-15 seconds when igniting, so that the thermocouple electromagnetic valve is instantaneously sucked (called zero second open valve), the pulse ignition controller is divided into two types, one type of push switch ignition can release the hand after the stove is ignited, the other type of push switch ignition can release the hand, the ignition time is basically synchronous with the suction time of the thermocouple electromagnetic valve, and most of the ignition time is about 8 seconds (called delay igniter).
The instantaneous suction type pulse ignition controller in the market at present adopts a double-coil electromagnetic valve, and a timing power supply control mode consisting of a resistor and a capacitor triode with simple structures is commonly adopted for time-delay valve opening. Although the structure is simple, once a triode is damaged, serious consequences can be brought, namely the electromagnetic valve is not put after being attracted for a long time, the safety protection effect cannot be achieved, and the danger is very high. And the delayed ignition controller on the market ignites for about 8 seconds regardless of whether the ignition is on or off, so that electricity is wasted, a user is not satisfied, and the fire is considered to be ignited and to be ignited.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a single coil (twin coil) thermocouple solenoid valve single needle flame sensing technique instantaneous suction type gas cooking utensils pulse ignition controller, through the protection of the delay switch circuit of establishing ties, overcome because a certain triode damages and makes the long-time actuation serious consequence that the solenoid valve was not put in time in the delay circuit all the way, greatly improved pulse ignition controller's security. Moreover, the utility model discloses still adopted the single needle sensing technique of the needle of striking sparks and response unification, realized that the function of striking sparks stops promptly to the time delay ignition controller is lighted. The power consumption is saved, and the integral ignition effect of the cooker is improved.
In order to achieve the above object, the utility model adopts the following technical scheme: a single-coil (double-coil) thermocouple electromagnetic valve instantaneous suction type single-needle sensing gas cooker pulse ignition controller comprises a direct-current power supply, an ignition switch, an ignition module, a constant-current source module, a thermocouple electromagnetic valve, a sensing module, a first delay switch circuit, a second delay switch circuit and a third delay switch circuit, wherein the input end of the first delay switch circuit is connected with the negative electrode of the direct-current power supply, the output end of the first delay switch circuit is connected with the input end of the constant-current source module, the second output end of the first delay switch circuit is connected with the input end of the ignition module through a diode, the first input end of the second delay switch circuit is connected with the output end of the constant-current source module, the output end of the second delay switch circuit is connected with the input end of the thermocouple electromagnetic valve, and the other end of the. The input end of the third delay switch circuit is connected to the ignition switch through a third charging capacitor, and the output end of the third delay switch circuit is connected with the second input end of the constant current source module.
The second output end of the second time delay switch circuit is connected with the induction module through a diode, one end of the induction module is connected with the cathode of a power supply, when the stove fire is ignited and the fire striking needle senses flame, the induction module immediately outputs a low potential to enable the Q31 (or Q32) to be conducted and output a high potential to enable the Q29 (or Q30) triode to be cut off so as to stop ignition.
The thermocouple electromagnetic valve is powered by the first delay switch circuit, the second delay switch circuit, the third delay switch circuit and the constant current source module in series, and has triple protection functions, so that the safety of the circuit is greatly improved.
The induction needle and the firing needle share the induction mode of one needle, and piezoresistor isolation is adopted.
Has the advantages that: the method of supplying power to the thermocouple electromagnetic valve by adopting a constant current source circuit overcomes the difficulty that the single-coil thermocouple electromagnetic valve cannot be used for the instantaneous-suction ignition controller, and has the advantages of lower cost and simple and reliable structure. Compared with the common constant current diode, the constant current source module consisting of the diode and the two resistors has lower cost, one of the resistors is a variable adjusting resistor, and the output current of the constant current source module can be conveniently adjusted by changing the resistance value of the resistor. Through two delay switch circuits connected in series, a constant current source module between the two delay switch circuits and a third delay circuit connected in series with the constant current source module, when one or two delay switch circuits are damaged and fail, the pulse ignition controller can be ensured to close the electromagnetic valve within safe time, triple safety protection is realized while the pulse ignition controller of the gas cooker can be instantly attracted, and the safety is greatly improved. The short-time delay switch circuit supplies power to the delay switch circuit after charging the capacitor, so that the time of delay ignition and delay valve suction is unchanged no matter under the condition that the ignition switch is switched on and then discharged or in a normally closed state for a short time, and the working stability of the pulse ignition controller is improved. The design that the delay time of the second delay switch circuit and the delay time of the third delay switch circuit are a few seconds longer than that of the first delay switch circuit ensures that the thermocouple electromagnetic valve is still attracted when the ignition module is ignited, and the instant absorption effect is ensured. The piezoresistor device is adopted to effectively isolate the path between the induction signal and the shell ground, and the high voltage can be conducted to the shell ground through the breakdown piezoresistor to form a high-voltage loop, so that the piezoresistor has lower cost and better reliability and durability compared with other gas discharge tubes and gap isolation. The mode that the sparking pin and the induction pin are integrated is adopted, the function of igniting and stopping the sparking immediately after igniting can be realized without changing a stove, the electricity is saved, the igniting effect is better, and the user is more satisfied.
Drawings
Fig. 1 is a schematic circuit diagram of a conventional double-coil thermocouple electromagnetic valve instantaneous suction type gas cooker pulse ignition controller.
Fig. 2 is a schematic diagram of a pulse ignition controller of an instantaneous gas cooker with ignition and suction valve time synchronization.
Fig. 3 is a schematic circuit block diagram of the single-coil (double-coil) thermocouple electromagnetic valve instantaneous suction type single-needle sensing technology gas cooker pulse ignition controller of the present invention.
FIG. 4 is a circuit diagram of a single-coil (dual-coil) thermocouple electromagnetic valve instantaneous absorption type single-needle sensing technology gas cooker pulse ignition controller in an embodiment
Detailed Description
Fig. 1 shows a circuit block diagram of a conventional double-coil thermocouple electromagnetic valve instantaneous-suction type gas cooker pulse ignition controller, a delay valve adopts a power supply control mode of a delay switch circuit consisting of a resistor, a capacitor and a triode, and although the structure is simple, the electromagnetic valve cannot be sucked for a long time and cannot be protected safely as only one triode in the delay switch circuit is damaged.
Fig. 2 shows a circuit block diagram of a delayed ignition pulse ignition controller, and unsafe factors also exist. Meanwhile, when the cooker is ignited, the ignition is still carried out, so that electricity is wasted, and users are not satisfied.
As shown in fig. 3, the single-coil (or dual-coil) thermocouple electromagnetic valve instantaneous-suction type single-needle sensing technology pulse ignition controller includes a dc power supply, an ignition switch, an ignition module, a thermocouple electromagnetic valve, a constant current source module, an induction module, a first delay switch circuit, a second delay switch circuit, a third delay switch circuit, a first short delay switch circuit, a second short delay switch circuit, a first charging capacitor C3, a second charging capacitor C7, and a third charging capacitor C1, wherein a first input end of the first delay switch circuit is connected to a negative electrode of the dc power supply, a first output end of the first delay switch circuit is connected to a first input end of the constant current source module, a second output end of the first delay switch circuit is connected to an input end of the ignition module through a diode, a first input end of the second delay switch circuit is connected to an output end of the constant current source module, a first output end of the second delay switch circuit is connected to an input end of the thermocouple electromagnetic valve, the output end of the thermocouple electromagnetic valve is connected with the anode of the direct-current power supply, and the second output end of the second time delay switch circuit is connected with the induction module through a diode. One end of the induction module is connected with the negative electrode, and the other end of the induction module is connected with the positive electrode of the power supply through a diode and resistors R69 and Q33.
Because the internal resistance of the single-coil thermocouple electromagnetic valve is very small and is in a milliohm level (about 20m omega), the constant current source module can be introduced to supply power to the electromagnetic valve, the problem that the single-coil thermocouple electromagnetic valve cannot be used for the instantaneous suction type pulse ignition controller is solved, the use cost of the thermocouple electromagnetic valve is reduced, and although the single-coil thermocouple electromagnetic valve is taken as an example in the embodiment, the circuit can also be suitable for the double-coil thermocouple electromagnetic valve.
Furthermore, the constant current source module is composed of two resistors and two triodes, the cost is lower compared with the common diode constant current source, one resistor can adopt an adjustable resistor, the adjustment resistance value can control the magnitude of the output current of the constant current source module, the constant range of the output current of the constant current source module is between 160 and 220mA, when the dry battery is at 3V or is reduced to 2.1V, the output current of the dry battery is basically constant and is between 160 and 220mA, and the single-coil thermocouple electromagnetic valve can be reliably attracted. The circuit adopts a mode that three paths of electricity are connected in series to supply electricity to the electromagnetic valve, when one path or 2 paths of electricity break down, the valve can still be closed in safe time, the safety is greatly improved, and due to the introduction of the induction module, when the stove fire is ignited, and after the ignition needle senses flame, the comparator in the induction module reversely rotates to output a control signal, so that the Q29 in the ignition module stops oscillating, and the ignition module stops igniting. Not only saves electric energy, but also has good effect. The induction module adopts a single-needle sensing technology integrating a firing needle and an induction needle, not only is the stove not required to be changed, but also a piezoresistor isolation technology is adopted, and compared with other isolation structures such as a discharge tube and a gap isolation structure, the induction module has the advantages of lower cost, better reliability and durability.
The constant current source module is at least composed of two triodes and two resistors and is used for supplying power to the thermocouple electromagnetic valve.
One of the resistors is a variable resistor and is used for controlling the magnitude of the output current of the constant current source module.
The current of the constant current source module is set between 160 and 220mA and is used for the single-coil thermocouple electromagnetic valve, and when the current is adjusted to be about 100mA, the constant current source module can be used for the double-coil thermocouple electromagnetic valve.
The delay time of the first short-delay time switch circuit and the second short-delay time switch circuit is 0.4-1 second.
The delay time of the first delay switch circuit is 8 +/-2 seconds, and the second delay time and the third delay time are 10-15 seconds.
The sensing module is composed of at least one comparator, two diodes, four resistors and four capacitors.
The induction module is used for isolating a flame signal to a ground path and enabling high voltage to have a loop, and the adopted piezoresistor is low in cost and high in reliability, and is superior to a gas discharge tube and other modes.
The principle diagram of the igniter in the figure is 2 sets of independent and respectively-ignited induction circuits, so the operation principle of the switch K2 is the same as that of the switch K1, and the description is omitted.
The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.
Claims (3)
1. The utility model provides a thermocouple solenoid valve transient absorption type single needle sensing gas cooking utensils pulse ignition controller which characterized in that, includes DC power supply, ignition switch, ignition module, thermocouple solenoid valve, constant current source module, single needle sensing induction module, first time delay switch circuit, second time delay switch circuit, third time delay switch circuit, first short time delay switch circuit and second short time delay switch circuit to and first charging capacitor, second charging capacitor and third charging capacitor: the input end of the first delay circuit is connected with the negative electrode of the direct-current power supply, and the first output end of the first delay circuit is connected with the input end of the constant-current source module; the second output end is connected with the input end of the ignition module through a diode;
the input end of the second delay switch circuit is connected with the output end of the constant current source module, the first output end of the second delay switch circuit is connected with the input end of the thermocouple electromagnetic valve, the other end of the thermocouple electromagnetic valve is connected with the anode of the direct current power supply, the second output end of the second delay switch circuit is connected with the induction module through a diode, and the other end of the induction module is connected with the cathode of the direct current power supply;
the input end of the third delay switch circuit is connected to one end of the ignition switch through a third charging capacitor, and the output end of the third delay switch circuit is connected with the second input end of the constant current source module.
2. The pulse ignition controller of a gas cooker as claimed in claim 1, wherein the thermocouple solenoid valve is powered in series by a first delay switch circuit, a second delay switch circuit, a third delay switch circuit and a constant current source module.
3. The gas cooker pulse ignition controller of claim 1, wherein the sensing needle and the firing needle share a single needle sensing mode, and a voltage dependent resistor isolation is employed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920745563.1U CN210511788U (en) | 2019-05-23 | 2019-05-23 | Thermocouple electromagnetic valve instant suction type single needle sensing gas cooker pulse ignition controller |
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| CN201920745563.1U CN210511788U (en) | 2019-05-23 | 2019-05-23 | Thermocouple electromagnetic valve instant suction type single needle sensing gas cooker pulse ignition controller |
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| CN210511788U true CN210511788U (en) | 2020-05-12 |
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| CN201920745563.1U Active CN210511788U (en) | 2019-05-23 | 2019-05-23 | Thermocouple electromagnetic valve instant suction type single needle sensing gas cooker pulse ignition controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242980A (en) * | 2019-05-23 | 2019-09-17 | 南京天富实业有限公司 | A kind of thermocouple solenoid valve wink suction type single needle sensing gas cooker pulse igniting controller |
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2019
- 2019-05-23 CN CN201920745563.1U patent/CN210511788U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242980A (en) * | 2019-05-23 | 2019-09-17 | 南京天富实业有限公司 | A kind of thermocouple solenoid valve wink suction type single needle sensing gas cooker pulse igniting controller |
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