Ignition control circuit

Abstract

The utility model relates to an ignition control circuit, which belongs to the technical field of gas appliance control circuits and comprises a main control module, a valve body control circuit, an ignition circuit and a spark detection circuit. The ignition circuit is connected with the main control module, and when the ignition circuit receives an ignition signal from the main control module, the ignition circuit ignites gas equipment; the spark detection circuit is connected with the ignition circuit and the main control module, and the spark detection circuit is used for detecting whether the ignition circuit ignites normally or not and sending a detection signal to the main control module according to a detection result; the valve body control circuit is connected with the main control module, the main control module sends a switching signal to the valve body control circuit according to the detection signal, and the valve body control circuit controls a valve body switch according to the switching signal. When it is detected that the ignition circuit normally releases electric sparks, the valve body is controlled to be opened for gas supply, resource waste caused by discharging of unignited gas is avoided, and detonation caused by gas gathering of the gas appliance can also be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas utensil control circuit technical field, specifically relates to a kind of ignition control circuit. BACKGROUND

[0002] At present, pulse ignition and gas valve opening of domestic gas utensil mostly adopt open-loop control mode, that is, controller first gives pulse igniter or pulse ignition circuit unit ignition instruction, waits 0.5 second or longer time, then energizes solenoid valve of control gas valve, opens gas valve, the defect of this ignition mode is that if pulse igniter is damaged or ignition needle is not installed correctly, it will leak unignited gas within ignition safety time. SUMMARY

[0003] The utility model discloses at least one of the technical problems existing in the prior art is solved.The utility model provides a kind of ignition control circuit.

[0004] The purpose of the utility model can be achieved by the following technical solutions:

[0005] A kind of ignition control circuit, including main control module, valve body control circuit, ignition circuit and spark detection circuit;

[0006] The ignition circuit is connected with the main control module, when the ignition circuit receives ignition signal from the main control module, it is ignited for gas equipment;

[0007] The spark detection circuit is connected with the ignition circuit and the main control module respectively, and the spark detection circuit is used to detect whether the ignition circuit is normally ignited, and sends a detection signal to the main control module according to the detection result;

[0008] The valve body control circuit is connected with the main control module, and the main control module sends a switch signal to the valve body control circuit according to the detection signal, and the valve body control circuit controls valve body switch according to the switch signal.

[0009] In further embodiments of the utility model, the ignition circuit includes ignition power supply circuit, oscillation boost circuit and high-voltage trigger ignition circuit;

[0010] The ignition power supply circuit includes first switch component, the first port of the first switch component is connected with the main control module, the second port of the first switch component is connected with the oscillation boost circuit, and the third port of the first switch component is grounded, when the first port of the first switch component receives ignition signal from the main control module, the second port and the third port of the first switch component are conducted, otherwise the second port and the third port of the first switch component are cut off;

[0011] The oscillation boost circuit is connected with the ignition power supply circuit and the high-voltage trigger ignition circuit component respectively, and is used for regulating the power supply voltage to the voltage required by the high-voltage trigger ignition circuit; when the oscillation boost circuit is grounded through the first switch component, the oscillation boost circuit outputs the voltage required by the high-voltage trigger ignition circuit, and otherwise the oscillation boost circuit does not output the voltage required by the high-voltage trigger ignition circuit;

[0012] The high-voltage trigger ignition circuit is used for ignition.

[0013] In further embodiments of the utility model, the oscillation boost circuit comprises a second switch component, a first transformer and a fourteenth resistor;

[0014] The first port of the second switch component is connected with the third port of the first transformer, the second port of the second switch component is connected with the power supply, the third port of the second switch component is connected with the first port of the first transformer, and when the first port of the second switch component receives a low-level signal, the second port thereof is connected with the third port, and otherwise the second port thereof is cut off from the third port;

[0015] The second port of the first transformer is grounded, the fourth port of the first transformer is connected with the second port of the first switch component through the fourteenth resistor, the first port of the first transformer is connected with the second port thereof, and the third port of the first transformer is connected with the fourth port thereof.

[0016] In further embodiments of the utility model, the high-voltage trigger ignition circuit comprises a rectifier diode, a third capacitor, a seventh resistor, a third switch component, a second transformer, a first electrode and a second electrode;

[0017] The fifth port of the first transformer is connected with the anode of the rectifier diode, and the sixth port of the first transformer is grounded;

[0018] The cathode of the rectifier diode is connected with one end of the third capacitor; the rectifier diode rectifies the voltage output by the first transformer and charges the third capacitor;

[0019] One end of the third capacitor is also connected with one end of the third switch component, and the other end of the third switch component is grounded; the other end of the third capacitor is connected with the third port of the second transformer, and the other end of the third switch component is also connected with the fourth port of the second transformer;

[0020] When the voltage of the third capacitor reaches the trigger voltage of the third switch component, one end and the other end of the third switch component are conducted, the boost circuit supplies power to the high-voltage trigger ignition circuit, and otherwise one end and the other end of the third switch component are cut off;

[0021] The first port of the second transformer is grounded, the first electrode is connected to the ground through the seventh resistor, the second port of the second transformer is connected to the second electrode, and the first port of the second transformer is connected to the second port.

[0022] The second port of the second transformer releases an electric spark by high-voltage breakdown of air between the first electrode and the second electrode through the second electrode.

[0023] In a further embodiment of the present application, the spark detection circuit comprises an acquisition circuit and a comparison circuit.

[0024] The acquisition circuit is connected to the comparison circuit and the ignition circuit, and is configured to acquire a comparison voltage generated when the ignition circuit releases an electric spark and transmit the comparison voltage to the comparison circuit.

[0025] The comparison circuit is configured to compare the comparison voltage with a standard voltage and send a comparison result to the main control module.

[0026] In a further embodiment of the present application, the comparison circuit comprises a voltage comparator, a positive input end of the voltage comparator is connected to a power supply to receive the standard voltage, a negative input end of the voltage comparator is connected to an output end of the acquisition circuit to receive the comparison voltage, and an output end of the voltage comparator is connected to the main control module.

[0027] In a further embodiment of the present application, the acquisition circuit comprises a rectifier diode and a first capacitor, a positive electrode of the rectifier diode is connected to the ignition circuit, a negative electrode of the rectifier diode is connected to one end of the first capacitor and an input end of the comparison circuit, and the other end of the first capacitor is grounded.

[0028] In a further embodiment of the present application, when the comparison voltage is greater than the standard voltage, the voltage comparator transmits a low-level signal to the main control module; and when the comparison voltage is not greater than the standard voltage, the voltage comparator transmits a high-level signal to the main control module.

[0029] In a further embodiment of the present application, the valve control circuit comprises a fourth switch assembly, a fifth switch assembly and a solenoid valve.

[0030] The first port of the fourth switch assembly is connected with the master control module, the second port of the fourth switch assembly is connected with the first port of the fifth switch assembly, the third port of the fourth switch assembly is grounded, when the first port of the fourth switch assembly receives a high level signal from the master control module, the second port of the fourth switch assembly is in communication with the third port, otherwise, the second port of the fourth switch assembly is cut off from the third port;

[0031] The second port of the fifth switch assembly is connected with a power supply, the third port of the fifth switch assembly is connected with a solenoid valve, when the first port of the fifth switch assembly is grounded through the fourth switch assembly after passing through a resistor, the second port of the fifth switch is in communication with the third port, the power supply supplies power to the solenoid valve, otherwise, the second port of the fifth switch is cut off from the third port.

[0032] In a further embodiment of the utility model, the valve body control circuit further includes a second capacitor, the second capacitor is a polar capacitor, the positive pole of the second capacitor is connected with the master control module, and the negative pole of the second capacitor is connected with the first port of the third switch assembly.

[0033] The utility model discloses the beneficial effects are: setting ignite detection circuit, when the gas appliance ignites, whether the ignition circuit is normal to release electric spark, when detecting that the ignition circuit releases electric spark normally, then control opens the valve body and carries out gas supply, avoids the resource waste caused by the gas leakage of not igniting, also can avoid the gas gathering of gas appliance and takes place deflagration. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to facilitate the person skilled in the art to understand, the utility model is further explained below in combination with the drawings.

[0035] Figure 1 The utility model discloses the circuit structure diagram provided in an embodiment.

[0036] Fig. 1 is a circuit structure diagram provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0037] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the following will combine with the drawings and the preferred embodiments to specifically explain the specific implementation manners, structures, features and effects according to the utility model as follows.

[0038] The utility model provides a kind of ignition control circuit in one embodiment, including main control module, valve body control circuit, ignition circuit and spark detection circuit;

[0039] Ignition circuit is connected with main control module, when ignition circuit receives ignition signal from main control module, it is ignited for gas equipment;

[0040] Spark detection circuit is connected with ignition circuit and main control module respectively, and spark detection circuit is used to detect whether ignition circuit is normally ignited, and sends a detection signal to main control module according to detection result;

[0041] Valve body control circuit is connected with main control module, and main control module sends a switch signal to valve body control circuit according to detection signal, and valve body control circuit controls valve body switch according to switch signal.

[0042] In the embodiment, ignition detection circuit is arranged, when gas appliance ignites, whether ignition circuit is normally released electric spark is detected, when normally released electric spark of ignition circuit is detected, then control opens valve body and carries out gas supply, avoid the waste of resources caused by unignited gas leakage, also can avoid the explosion of gas gathering of gas appliance.

[0043] In further embodiment of the utility model, ignition circuit includes ignition power supply circuit, oscillation boost circuit and high-voltage trigger ignition circuit;

[0044] Ignition power supply circuit includes first switch component, the first port of first switch component is connected with main control module, the second port of first switch component is connected with oscillation boost circuit, and the third port of first switch component is grounded, when the first port of first switch component receives ignition signal from main control module, the second port and the third port of first switch component are conducted, otherwise the second port and the third port of first switch component are cut off;

[0045] Oscillation boost circuit is connected with ignition power supply circuit and high-voltage trigger ignition circuit component respectively, for adjusting power supply voltage to the voltage required by high-voltage trigger ignition circuit, when oscillation boost circuit is grounded through first switch component, oscillation boost circuit outputs the voltage required by high-voltage trigger ignition circuit, otherwise oscillation boost circuit does not output the voltage required by high-voltage trigger ignition circuit;

[0046] High-voltage trigger ignition circuit is used for ignition.

[0047] In the embodiment, the first switch assembly is an NPN type first triode Q1, wherein the base of the first triode Q1 is a first port of the first switch assembly, the collector of the first triode Q1 is a second port of the first switch assembly, the emitter of the first triode Q1 is a third port of the first switch assembly, the base of the first triode Q1 is connected with the main control module through a current-limiting resistor twelfth resistor R12, and the base of the first triode Q1 is also connected with a pull-down resistor thirteenth resistor R13.

[0048] When the main control module receives the ignition operation of the user, the main control module sends an ignition signal to the ignition circuit, that is, the main control module sends a high-level signal to the base of the first triode Q1, and after the base of the first triode Q1 receives the ignition signal from the main control module, the collector and the emitter of the first triode Q1 are turned on, and the oscillation voltage boosting circuit outputs a high voltage required by the ignition circuit.

[0049] In a further embodiment of the utility model, the oscillation voltage boosting circuit comprises a second switch assembly, a first transformer T1 and a fourteenth resistor R14.

[0050] The first port of the second switch assembly is connected with the third port of the first transformer T1, the second port of the second switch assembly is connected with a power supply, the third port of the second switch assembly is connected with the first port of the first transformer T1, when the first port of the second switch assembly receives a low-level signal, the second port and the third port of the second switch assembly are connected, otherwise, the second port and the third port of the second switch assembly are cut off.

[0051] The second port of the first transformer T1 is grounded, the fourth port of the first transformer T1 is connected with the second port of the first switch assembly through the fourteenth resistor R14, the first port of the first transformer T1 is connected with the second port of the first transformer T1, and the third port of the first transformer T1 is connected with the fourth port of the first transformer T1.

[0052] In the embodiment, the second switch assembly is a PNP type second triode Q2, wherein the base of the second triode Q2 is a first port of the second switch assembly, the emitter of the second triode Q2 is a second port of the second switch assembly, the collector of the second triode Q2 is a third port of the second switch assembly, and the base of the second triode Q2 is connected with the collector of the first triode Q1 through the fourteenth resistor R14.

[0053] The first port and the second port of the first transformer T1 are connected and located at a primary side of the first transformer T1, the third port and the fourth port of the first transformer T1 are connected and located at the primary side of the first transformer T1, and the fifth port and the sixth port of the first transformer T1 are connected and located at a secondary side of the first transformer T1.

[0054] When the master module sends the ignition signal, the first triode Q1 is turned on, a self-oscillator composed of the first transformer T1, the fourteenth resistor R14 and the second triode Q2 works, and the secondary side of the first transformer T1 outputs high voltage to provide working voltage for the high-voltage trigger ignition circuit.

[0055] In a further embodiment of the utility model, the high-voltage trigger ignition circuit comprises a rectifier diode D3, a third capacitor C3, a seventh resistor R7, a third switch component, a second transformer T2, a first electrode P1 and a second electrode P2.

[0056] The fifth port of the first transformer T1 is connected with the anode of the rectifier diode D3, and the sixth port of the first transformer T1 is grounded.

[0057] The cathode of the rectifier diode D3 is connected with one end of the third capacitor C3; the rectifier diode D3 rectifies the voltage output by the first transformer and charges the third capacitor C3.

[0058] One end of the third capacitor C3 is also connected with one end of the third switch component, and the other end of the third switch component is grounded; the other end of the third capacitor C3 is connected with the third port of the second transformer T2, and the other end of the third switch component is also connected with the fourth port of the second transformer T2.

[0059] When the voltage of the third capacitor C3 reaches the trigger voltage of the third switch component, one end of the third switch component is connected with the other end, the boost circuit supplies power to the high-voltage trigger ignition circuit, otherwise, one end of the third switch component is cut off from the other end.

[0060] The first port of the second transformer T2 is grounded, the first electrode P1 is grounded through the seventh resistor R7, the second port of the second transformer T2 is connected with the second electrode P2, and the first port and the second port of the second transformer T2 are connected.

[0061] The second port of the second transformer T2 releases an electric spark by high-voltage breakdown of the air between the first electrode P1 and the second electrode P2 through the second electrode P2.

[0062] In the embodiment, the fifth port and the sixth port of the first transformer T1 are connected at the secondary side of the first transformer T1; the third port and the fourth port of the second transformer T2 are at the primary side of the second transformer T2, and the first port and the second port of the second transformer T2 are at the secondary side of the second transformer T2.

[0063] The secondary side of the first transformer T1 outputs high voltage, and after rectification by the rectifier diode D3, the third capacitor C3 is charged, when the voltage of the third capacitor C3 exceeds the trigger voltage of the third switch component, the third switch component is turned on to supply power for the primary side of the second transformer T2, the secondary side of the second transformer T2 outputs high voltage, the second electrode P2 breaks through the air between the first electrode P1 and the second electrode P2 to release the electric spark, wherein the first electrode P1 is grounded through the seventh resistor R7, when the electric spark is released between the first electrode P1 and the second electrode P2, a voltage is generated on the seventh resistor R7, and the detection circuit detects whether the high-voltage trigger ignition circuit is normally ignited by detecting the voltage on the seventh resistor R7.

[0064] The third switch component is a trigger diode D4, wherein the negative electrode of the trigger diode D4 is the first port of the third switch component, and the positive electrode of the trigger diode D4 is the second port of the third switch component.

[0065] In a further embodiment of the utility model, the spark detection circuit comprises an acquisition circuit and a comparison circuit;

[0066] The acquisition circuit is connected with the comparison circuit and the ignition circuit respectively, and is used for acquiring a comparison voltage generated when the electric spark is released and transmitting the comparison voltage to the comparison circuit;

[0067] The comparison circuit is used for comparing the comparison voltage with a standard voltage and sending a comparison result to the main control module.

[0068] In the embodiment, the spark detection circuit acquires the comparison voltage generated when the electric spark is released through the acquisition circuit; the comparison circuit compares the comparison voltage with the standard voltage to determine whether the ignition circuit is normally ignited and sends the comparison result to the main control module.

[0069] In a further embodiment of the utility model, the comparison circuit comprises a voltage comparator U2A, the positive input end of the voltage comparator U2A is connected with a power supply to receive a standard voltage, the negative input end of the voltage comparator U2A is connected with the output end of the acquisition circuit to receive a comparison voltage, and the output end of the voltage comparator U2A is connected with the main control module.

[0070] In the embodiment, the positive input end of the voltage comparator U2A is grounded through the third resistor R3, the positive input end of the voltage comparator U2A is connected with the power supply through R2, the output end of the voltage comparator U2A is connected with the numerical control module, the output end of the voltage comparator U2A is also connected with the pull-up resistor first resistor R1, the negative input end of the voltage comparator U2A is connected with the output end of the acquisition circuit, the negative input end of the voltage comparator U2A is also connected with the power supply through the first diode D1, and the positive electrode of the first diode D1 is close to one side of the negative input end of the second comparator U2A.

[0071] In the further embodiment of the utility model, the acquisition circuit includes rectifier diode D2 and first capacitor C1, the positive pole of rectifier diode D2 is connected with the ignition circuit, the negative pole of rectifier diode D2 is connected with one end of first capacitor C1 and the input end of comparison circuit respectively, the other end of first capacitor C1 is grounded.

[0072] In the embodiment, the two ends of first capacitor C1 are also connected with fifth capacitor R5 in parallel, the positive pole of rectifier diode D2 is connected with the ignition circuit through current-limiting resistor sixth resistor R6 and is connected between seventh resistor R7 and first electrode P1, when the acquisition circuit releases electric spark, the current generated is rectified by rectifier diode D2 and then charges first capacitor C1, when the voltage of first capacitor C1 exceeds the reference voltage of the positive input end of voltage comparator U2A, the output end of voltage comparator U2A outputs a low level signal to the main control module.

[0073] After the acquisition circuit acquires the current generated when the ignition circuit releases electric spark, first capacitor C1 is charged first, when the voltage of first capacitor C1 exceeds the standard voltage, voltage comparator U2A sends a low level signal to the main control module again, to ensure that the electric spark released after the ignition of the ignition circuit is in a continuous state.

[0074] In the further embodiment of the utility model, when the comparison voltage is greater than the standard voltage, voltage comparator U2A transmits a low level signal to the main control chip, when the comparison voltage is not greater than the standard voltage, voltage comparator U2A transmits a high level signal to the main control chip.

[0075] It can be understood that the signal type outputted by voltage comparator U2A to the main control chip according to the comparison result of comparison voltage and standard voltage will change due to the difference of specific parameters of voltage comparator U2A.

[0076] In the further embodiment of the utility model, the valve body control circuit includes fourth switch assembly, fifth switch assembly and electromagnetic valve;

[0077] The first port of fourth switch assembly is connected with the main control module, the second port of fourth switch assembly is connected with the first port of fifth switch assembly, the third port of fourth switch assembly is grounded, when the first port of fourth switch assembly receives the high level signal from the main control module, the second port of fourth switch assembly is communicated with the third port, contrarily, the second port of fourth switch assembly is cut off with the third port;

[0078] The second port of the fifth switch assembly is connected with the power supply, the third port of the fifth switch assembly is connected with the electromagnetic valve, when the first port of the fifth switch assembly is grounded through the fourth switch assembly, the second port of the fifth switch assembly is in communication with the third port, the power supply supplies power for the electromagnetic valve, on the contrary, the second port of the fifth switch assembly is cut off with the third port.

[0079] In the embodiment, the fourth switch assembly is an NPN type third triode Q3, the base of the third triode Q3 is the first port of the fourth switch assembly, the collector of the third triode Q3 is the second port of the fourth switch assembly, and the emitter of the third triode Q3 is the third port of the fourth switch assembly; the fifth switch assembly is a PNP type fourth triode Q4, the base of the fourth triode Q4 is the first port of the fifth switch assembly, the emitter of the fourth triode Q4 is the second port of the fifth switch assembly, and the collector of the fourth triode Q4 is the third port of the fifth switch assembly.

[0080] The base of the third triode Q3 is connected with the master control module through a current limiting resistor eighth resistor R8, when a high level signal from the master control module is received, the third triode Q3 is turned on, the base of the fourth triode Q4 is connected with the collector of the third triode Q3 through a current limiting resistor tenth resistor R10, and the fourth triode Q4 is turned on through the collector of the third triode Q3 being grounded, then the power supply supplies power for the electromagnetic valve through the emitter of the fourth triode Q4, one end of the electromagnetic valve is connected with the collector of the fourth triode Q4, the other end of the electromagnetic valve is grounded, and the two ends of the electromagnetic valve are further connected with a ninth diode D9, the negative electrode of the ninth diode D9 is connected with one end of the electromagnetic valve.

[0081] The base of the third triode Q3 is further connected with a pull-down resistor ninth resistor R9, and the base of the fourth triode Q4 is further connected with a pull-up resistor R11.

[0082] In the further embodiment of the utility model, the valve body control circuit further includes a second capacitor C2, the second capacitor C2 is a polarized capacitor, the positive electrode of the second capacitor C2 is connected with the master control module, and the negative electrode of the second capacitor C2 is connected with the first port of the fourth switch assembly.

[0083] In the embodiment, the second capacitor C2 is further connected between the third triode Q3 and the master control module for signal coupling.

[0084] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. An ignition control circuit, characterized by The valve control circuit, the ignition circuit and the spark detection circuit are connected with the main control module. The ignition circuit is connected with the main control module, and ignites the gas equipment when receiving the ignition signal from the main control module. The spark detection circuit is connected with the ignition circuit and the main control module, and detects whether the ignition circuit ignites normally and sends a detection signal to the main control module according to the detection result. The valve control circuit is connected with the main control module, and the main control module sends an on-off signal to the valve control circuit according to the detection signal, and the valve control circuit controls the valve according to the on-off signal.

2. An ignition control circuit according to claim 1, characterised in that, The ignition circuit comprises an ignition power supply circuit, an oscillation boost circuit and a high-voltage trigger ignition circuit. The first switch component is connected with the main control module at the first port, connected with the oscillation boost circuit at the second port, and grounded at the third port. The oscillation boost circuit is connected with the ignition power supply circuit and the high-voltage trigger ignition circuit, and adjusts the voltage of the power supply to the voltage required by the high-voltage trigger ignition circuit. The high-voltage trigger ignition circuit is used for ignition.

3. An ignition control circuit according to claim 2, wherein The oscillation boost circuit comprises a second switch component, a first transformer (T1) and a fourteenth resistor (R14). The first port of the second switch component is connected with the third port of the first transformer (T1), the second port of the second switch component is connected with the power supply, the third port of the second switch component is connected with the first port of the first transformer (T1), and the second port is connected with the third port when the first port receives a low-level signal, otherwise the second port is cut off from the third port. The second port of the first transformer (T1) is grounded, the fourth port of the first transformer (T1) is connected with the second port of the first switch component through the fourteenth resistor (R14), the first port of the first transformer (T1) is connected with the second port, and the third port of the first transformer (T1) is connected with the fourth port.

4. An ignition control circuit according to claim 3, wherein The high-voltage trigger ignition circuit comprises a rectifier diode (D3), a third capacitor (C3), a seventh resistor (R7), a third switch component, a second transformer (T2), a first electrode (P1) and a second electrode (P2). The fifth port of the first transformer (T1) is connected with the positive electrode of the rectifier diode (D3), the sixth port of the first transformer (T1) is grounded, and the fifth port is connected with the sixth port. The negative electrode of the rectifier diode (D3) is connected with one end of the third capacitor (C3); the rectifier diode (D3) rectifies the voltage output by the first transformer and charges the third capacitor (C3); The other end of the third capacitor (C3) is also connected with one end of the third switch assembly, and the other end of the third switch assembly is grounded; the other end of the third capacitor (C3) is connected with the third port of the second transformer (T2), and the other end of the third switch assembly is also connected with the fourth port of the second transformer (T2); the third port and the fourth port of the second transformer (T2) are connected; When the voltage of the third capacitor (C3) reaches the trigger voltage of the third switch assembly, one end and the other end of the third switch assembly are turned on, and the boost circuit supplies power to the high-voltage trigger ignition circuit; otherwise, one end and the other end of the third switch assembly are turned off. The first port of the second transformer (T2) is grounded, the first electrode (P1) is grounded through the seventh resistor (R7) and connected with the second transformer (T2), the second port of the second transformer (T2) is connected with the second electrode (P2), the first port and the second port of the second transformer (T2) are connected, and the first port and the second port of the second transformer (T2) are connected. The second port of the second transformer (T2) releases an electric spark by high-voltage breakdown of the air between the first electrode (P1) and the second electrode (P2).

5. An ignition control circuit according to claim 1, wherein The spark detection circuit comprises a collection circuit and a comparison circuit; The collection circuit is connected with the comparison circuit and the ignition circuit respectively, and is used for collecting a comparison voltage generated when the ignition circuit releases an electric spark and transmitting the comparison voltage to the comparison circuit; The comparison circuit is used for comparing the comparison voltage with a standard voltage and sending a comparison result to the main control module.

6. An ignition control circuit according to claim 5, wherein The comparison circuit comprises a voltage comparator (U2A), the positive input end of the voltage comparator (U2A) is connected with a power supply to receive a standard voltage, the negative input end of the voltage comparator (U2A) is connected with the output end of the collection circuit to receive a comparison voltage, and the output end of the voltage comparator (U2A) is connected with the main control module.

7. An ignition control circuit according to claim 6, characterised in that, The collection circuit comprises a rectifier diode (D2) and a first capacitor (C1), the positive electrode of the rectifier diode (D2) is connected with the ignition circuit, the negative electrode of the rectifier diode (D2) is connected with one end of the first capacitor (C1) and the input end of the comparison circuit respectively, and the other end of the first capacitor (C1) is grounded.

8. An ignition control circuit according to claim 6, wherein When the comparison voltage is greater than the standard voltage, the voltage comparator (U2A) transmits a low-level signal to the main control module; when the comparison voltage is not greater than the standard voltage, the voltage comparator (U2A) transmits a high-level signal to the main control module.

9. An ignition control circuit according to claim 1, wherein The valve body control circuit comprises a fourth switch assembly, a fifth switch assembly and an electromagnetic valve; The first port of the fourth switch assembly is connected with the master control module, the second port of the fourth switch assembly is connected with the first port of the fifth switch assembly, the third port of the fourth switch assembly is grounded, when the first port of the fourth switch assembly receives high level signal from the master control module, the second port of the fourth switch assembly is in communication with the third port, otherwise, the second port of the fourth switch assembly is cut off from the third port; The second port of the fifth switch assembly is connected with the power supply, the third port of the fifth switch assembly is connected with the electromagnetic valve, when the first port of the fifth switch assembly is grounded through the fourth switch assembly, the second port of the fifth switch is in communication with the third port, the power supply supplies power to the electromagnetic valve, otherwise, the second port of the fifth switch is cut off from the third port.

10. An ignition control circuit according to claim 9, wherein The valve body control circuit further comprises a second capacitor (C2), the second capacitor (C2) is a polar capacitor, the positive electrode of the second capacitor (C2) is connected with the master control module, and the negative electrode of the second capacitor (C2) is connected with the first port of the fourth switch assembly.

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