CN110906362B

CN110906362B - Ignition control circuit for single-cell thermocouple kitchen range

Info

Publication number: CN110906362B
Application number: CN201911243668.8A
Authority: CN
Inventors: 郑华生
Original assignee: China Micro Semiconductor Shenzhen Co ltd
Current assignee: China Micro Semiconductor Shenzhen Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-10-20
Anticipated expiration: 2039-12-06
Also published as: CN110906362A

Abstract

The invention relates to the technical field of ignition control of gas cookers, in particular to an ignition control circuit of a single-cell thermocouple cooker. The specific technical scheme is as follows: the ignition control circuit of the single-cell thermocouple cooker comprises a high-frequency oscillator, an SOC microcontroller, and two S1 switches and an S2 switch which are arranged in parallel and one end of each of which is connected with the positive electrode of VCC, wherein the output ends of the S1 switch and the S2 switch are respectively connected with the input end of the SOC microcontroller through resistors, the output ends of the S1 switch and the S2 switch are respectively connected with two groups of boosting ignition modules through diodes, and the output ends of the two diodes are respectively connected with the negative electrode of VCC through the other diode; the SOC microcontroller is connected with VCC through two thermocouples, the SOC microcontroller is connected with the high-frequency oscillator through an R1 resistor, and the high-frequency oscillator is connected with the two groups of boosting ignition modules. The ignition control circuit greatly reduces the use of discrete components, reduces the complexity of the whole circuit, reduces the cost, reduces the area of a PCB (printed circuit board), and improves the ignition reliability, flexibility and integration level.

Description

Ignition control circuit for single-cell thermocouple kitchen range

Technical Field

The invention relates to the technical field of ignition control of gas cookers, in particular to an ignition control circuit of a single-cell thermocouple cooker.

Background

At present, every household is provided with a gas cooker or a natural gas cooker, the gas cooker or the natural gas cooker is combustible gas, so that the reliability of the cooker is obviously very important, and the reliability of the cooker is realized by the reliability of an ignition control circuit in the cooker. The ignition circuit of the general cooking utensils is made up of discrete components and parts such as triode, diode, resistance, inductance and electric capacity, it is electricity-saving to have main advantages, the success rate of igniting is higher, the reliability is higher, but there are obvious disadvantages too, the use of a large number of discrete components makes the overall structure of the circuit complicated, with high costs, is unfavorable for miniaturization, characteristic of integrating.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the ignition control circuit of the single-cell thermocouple cooker, which greatly reduces the use of discrete components in the ignition control circuit, reduces the complexity of the whole circuit, reduces the cost, reduces the area of a PCB (printed circuit board), and improves the ignition reliability, flexibility and integration level.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the ignition control circuit of the single-cell thermocouple cooker comprises a high-frequency oscillator, an SOC microcontroller connected with the input end of the high-frequency oscillator, and two S1 switches and S2 switches which are parallel and one end of each of which is connected with the positive electrode of VCC, wherein the output ends of the S1 switch and the S2 switch are respectively connected with the input end of the SOC microcontroller through resistors, the output ends of the S1 switch and the S2 switch are respectively connected with two groups of boosting ignition modules through a D4 diode and a D5 diode, and the output ends of the D4 diode and the D5 diode are respectively connected with VCC through a D6 diode and a D7 diode; two output ends of the SOC microcontroller are respectively connected with VCC through an L2 thermocouple and an L3 thermocouple, the output end of the SOC microcontroller is connected with the high-frequency oscillator through an R1 resistor, and the high-frequency oscillator is connected with the two groups of boosting ignition modules.

Preferably, the S1 switch output terminal is connected to the INA input port of the SOC microcontroller via an R5 resistor, and the S2 switch output terminal is connected to the INB input port of the SOC microcontroller via an R7 resistor.

Preferably, the high-frequency oscillator comprises a C1 capacitor, a Q1 triode and a T1 transformer, one end of a primary coil of the high-frequency oscillator is connected to an OUTC end of the SOC microcontroller through an R1 resistor, an output end of the T1 transformer is connected with a D2 diode in series, and an output end of the D2 diode is connected with a D3 diode and two groups of boost ignition modules.

Preferably, the two groups of boosting ignition modules respectively comprise a C2 capacitor and a T2 transformer, as well as a C3 capacitor and a T3 transformer, the primary side output end of the T2 transformer is connected with the output end of a D4 diode, and the primary side output end of the T3 transformer is connected with the output end of a D5 diode.

Preferably, the L2 thermocouple and the L3 thermocouple are connected to the OUTA terminal and the OUTB terminal of the SOC microcontroller, respectively.

Preferably, the VCC positive pole is connected with L1 inductance, the VCC port and the Z5 diode of SOC microcontroller are connected respectively to the output of L1 inductance, the VDD port of SOC microcontroller is connected to the output of Z5 diode and there are C6 electric capacity and C7 electric capacity in parallel, the other end of C6 electric capacity and C7 electric capacity is ground connection respectively.

Preferably, the SOC microcontroller comprises a general MCU, a boost module and a plurality of large current driving NMOS transistors.

Preferably, the INA port and the INB port are respectively connected with pull-down resistors RA and RB, meanwhile, the INA port and the INB port are respectively connected with an INA _ IN port and an INB _ IN port of the general MCU, and the other ends of the two pull-down resistors RA and RB are respectively grounded.

Preferably, the INA port and the INB port are connected to an input end of a logic or gate, an output end of the logic or gate is connected to an enable end of the boost module, and a CPOUT port of the boost module is connected to a VCC port of the SOC microcontroller; and the VDD port of the boosting module and the VDD port of the general MCU are commonly connected to the VDD port of the SOC microcontroller.

Preferably, the INA _ OUT, INB _ OUT and INC _ OUT ports of the general MCU are respectively connected to the gate of the high-current drive NMOS transistor; the source ends of the large-current drive NMOS transistors are connected to GND together, and the drain ends of the large-current drive NMOS transistors are connected with the OUTA, OUTB and OUTC ends of the SOC microcontroller respectively.

The invention has the following beneficial effects:

1. the invention is composed of a high-frequency oscillator, an SOC microcontroller, two thermocouple elements, a plurality of resistors, a capacitor and an inductor. An 8-bit general MCU, a VDD boosting module and a plurality of heavy-current driving NMOS transistors are integrated in the SOC microcontroller. The system comprises an SOC microcontroller, a thermocouple device, a power supply, a temperature sensor, a; the SOC microcontroller also has an OUTC output to control the enabling of the high frequency oscillator. When one knob of a cooker is pressed, the state of the INA or INB input end of an SOC microcontroller is changed into high level, after a knob pressing instruction is detected, a high-frequency oscillator is started, the high-frequency oscillator increases 1.5V direct current to alternating current of about 150V, the output end of a D2 diode is connected with a D3 diode, when the voltage of the negative end of the D3 diode reaches about 150V, the D3 diode is broken down and conducted, the internal resistance of the D3 diode is small, a C2 capacitor and a T2 transformer or (a C3 capacitor and a T3 transformer) are connected with the D3 diode, and when a large current flows through the D3 diode, the secondary coil of the T2 or T3 transformer generates high voltage of more than 10KV, so that high-voltage discharge is generated, and ignition is realized. When the C2 capacitor or the C3 capacitor is continuously charged until the D3 diode is broken down and discharged again, ignition is realized, and the process is repeated, so that continuous and intermittent ignition effect is realized.

2. In the prior art, dozens of components are needed for realizing the ignition function by adopting discrete components, and the system function can be influenced by the damage of any one component; the invention greatly reduces the use of discrete components in the ignition control circuit, integrates the boosting function module (boosting module) and the driving function module (heavy current driving NMOS transistor) into the SOC microcontroller, only needs dozens of discrete components on the PCB, improves the ignition reliability, reduces the complexity of the whole circuit, reduces the cost and reduces the area of the PCB compared with the prior art. And moreover, the flexibility of the ignition time is realized by adopting the general MCU, and meanwhile, the effective time of the ignition signal continuation after the ignition switch is switched off can be controlled without manual control.

Drawings

FIG. 1 is a schematic diagram of an ignition control circuit of the present invention;

FIG. 2 is an internal block diagram of the SOC microcontroller;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.

Referring to fig. 1-2, the invention discloses an ignition control circuit of a single-cell thermocouple cooker, which comprises a high-frequency oscillator, an SOC microcontroller connected with an input end of the high-frequency oscillator, and two parallel S1 switches and S2 switches, one end of each switch being connected with a positive electrode of VCC, wherein output ends of the S1 switch and the S2 switch are respectively connected with the input end of the SOC microcontroller through resistors, specifically: the output end of the S1 switch is connected with the INA input port of the SOC microcontroller through the R5 resistor, and the output end of the S2 switch is connected with the INB input port of the SOC microcontroller through the R7 resistor.

The output ends of an S1 switch and an S2 switch are respectively connected with two groups of boosting ignition modules through a D4 diode and a D5 diode, the output ends of a D4 diode and a D5 diode are respectively connected with VCC through a D6 diode and a D7 diode, the two groups of boosting ignition modules respectively consist of a C2 capacitor, a T2 transformer, a C3 capacitor and a T3 transformer, the primary side output end of the T2 transformer is connected with the output end of a D4 diode, and the primary side output end of the T3 transformer is connected with the output end of a D5 diode.

Two output ends of the SOC microcontroller are respectively connected with VCC through an L2 thermocouple and an L3 thermocouple, and an L2 thermocouple and an L3 thermocouple are respectively connected with the OUTA end and the OUTB end of the SOC microcontroller. The output end of the SOC microcontroller is connected with the high-frequency oscillator through the R1 resistor, and the high-frequency oscillator is connected with the two groups of boosting ignition modules.

The high-frequency oscillator comprises a C1 capacitor, a Q1 triode and a T1 transformer, one end of a primary coil of the high-frequency oscillator is connected to an OUTC end of the SOC microcontroller through an R1 resistor, the output end of the T1 transformer is connected with a D2 diode in series, and the output end of the D2 diode is connected with a D3 diode and two groups of boosting ignition modules in parallel.

The VCC positive pole is connected with an L1 inductor, the output end of the L1 inductor is connected with the VCC port of the SOC microcontroller and the input end (positive pole) of the Z5 diode, the output end (negative pole) of the Z5 diode is connected with the VDD port of the SOC microcontroller and is connected with a C6 capacitor and a C7 capacitor in parallel, and the other ends of the C6 capacitor and the C7 capacitor are respectively grounded.

The SOC microcontroller comprises an MCU, a boosting module and a plurality of heavy current driving NMOS transistors. The INA port and the INB port are respectively connected with pull-down resistors, meanwhile, the INA port and the INB port are respectively connected with the INA _ IN port and the INB _ IN port of the general MCU, and the other ends of the two pull-down resistors are respectively grounded.

The INA port and the INB port are connected to the input end of the logic OR gate, the output end of the logic OR gate is connected with the enabling end of the boosting module, and the CPOUT port of the boosting module is connected to the VCC port of the SOC microcontroller; and the VDD port of the boosting module and the VDD port of the general MCU are commonly connected to the VDD port of the SOC microcontroller.

The INA _ OUT, INB _ OUT and INC _ OUT ports of the general MCU are respectively connected to the grid of the high-current drive NMOS transistor; the source ends of the large-current drive NMOS transistors are connected to GND together, and the drain ends of the large-current drive NMOS transistors are connected with the OUTA, OUTB and OUTC ends of the SOC microcontroller respectively.

Referring to fig. 1, a high-frequency oscillator is composed of a C1 capacitor, a Q1 triode, and a T1 transformer, one end of a primary coil of the high-frequency oscillator is connected to an OUTC end of an SOC microcontroller through a series R1 resistor, an output end of the T1 transformer is connected in series with a D2 diode, an output end of the D2 diode is connected in parallel with a D3 diode and two groups of boost ignition modules, and an output end of the D3 diode is connected to an output end of a D2 diode. The high-frequency oscillator is used for increasing the direct current of 1.5V to the alternating current of about 150V through a D2 diode. The two groups of boosting ignition modules respectively form one group of boosting ignition modules by a C2 capacitor and a T2 transformer, and form the other group of boosting ignition modules by a C3 capacitor and a T3 transformer.

One end of the S1 switch is connected with VCC, and the other end is connected with an INA input port of the SOC microcontroller through a series R5 resistor; one end of an S2 switch is connected with VCC, the other end of the S2 switch is connected with an INB input port of the SOC microcontroller through a series R7 resistor, the anode of a D4 diode is connected with the output end of the S1 switch, the cathode of the D4 diode is connected with one end of a primary coil of the T2 transformer and the anode of a D6 diode, and the cathode of a D6 diode is connected with VCC; the anode of the diode D5 is connected with the output end of the S2 switch, the cathode is connected with one end of the primary coil of the T3 transformer and the anode of the diode D7, and the cathode of the diode D7 is connected with VCC. It should be understood that: the D4 and D6 diodes are used for isolating the influence of the voltage at the output end of the D6 diode on the INA port and preventing the damage of the INA port; the D5 and D7 diodes are used for isolating the voltage at the output end of the D7 diode from influencing the INB port and preventing the damage of the INB port.

The OUTA end and the OUTB end of the SOC microcontroller are respectively connected with the L2 thermocouple and the L3 thermocouple, and the other ends of the two thermocouples are connected with VCC. The positive pole of the L1 inductor is connected with VCC, the negative pole is connected with a VCC port of the SOC microcontroller and the positive pole of the Z5 diode, the negative pole of the Z5 diode is connected with a VDD end of the SOC microcontroller and is connected with a C6 capacitor and a C7 capacitor in parallel, and the output ends of the C6 capacitor and the C6 capacitor are grounded. The output end of VCC is connected with a C4 capacitor, the input end of the L1 inductor is connected with a C5 capacitor, the C4 capacitor is connected with a C5 capacitor in parallel, and the output ends of the C4 capacitor and the C5 capacitor are grounded. The C4 capacitor and the C5 capacitor are filter capacitors of VCC and GND. It should be understood that: the connection of the two thermocouples to the SOC microcontroller is due to: firstly, the first opening of the S1 or S2 switch is manually opened, the gas valve is simultaneously opened after the power is on, and the time is maintained for several seconds, when the thermocouple is heated to a certain temperature after the gas of the cooker is burnt, certain electromotive force is generated at two ends of the thermocouple, the switch of the cooker is released by the hand, the gas valve is kept in an open state under the action of the thermocouple after the power is off, and the gas is continuously burnt; therefore, the thermocouple plays a role in maintaining the gas valve open.

Referring to fig. 2, the SOC microcontroller includes an MCU, a boost module, and a number of large current driving NMOS transistors. The INA and INB ports are connected to a logic OR gate (OR)₃) The input end is connected with an INA port, the resistor of RA 100K is connected to GND, and the INA port is connected with an INA _ IN port of the general MCU; the INB port is connected with a resistor RB 100K to GND and is connected with an INB _ IN port of the general MCU; one output end of the general MCU is connected to one input end of the logic OR gate; the INA _ OUT, INB _ OUT and INC _ OUT ports of the general MCU are respectively connected to the gates of the N0, N1 and N2 high-current driving NMOS transistors; the source terminals of N0, N1 and N2 are commonly connected to GND, and the drain terminals of N0, N1 and N2 are respectively connected with the OUTA, OUTB and OUTC terminals of the SOC microcontroller.

An enable port EN of the boost module is connected with an output end of the logic OR gate, and a CPOUT port of the boost module is connected to a VCC port of the SOC microcontroller; and the VDD port of the boosting module and the VDD port of the general MCU are commonly connected to the VDD port of the SOC microcontroller.

The working principle of the SOC microcontroller is as follows: when the S1 switch or the S2 switch IN fig. 1 is closed, the gas valve is opened at the same time, the voltage of the INA or INB port is at a high level, so that the logic or gate outputs a high level to drive the boost module to operate, the VCC port of the SOC microcontroller outputs a periodic PWM oscillation signal, under the action of the L1 inductor, the Z5 diode, and the C6 and C7 capacitors connected to the Z5 diode IN fig. 1, the VDD port voltage of the SOC microcontroller is raised to about 2.5V, so as to drive the general MCU inside the SOC microcontroller to start operating, the general MCU detects the high level of the INA _ IN or INB _ IN port, so that the high level is output at the general MCU port INA _ OUT or INB _ OUT, and the high level is output at the same time at the INC _ OUT port, and at this time, the transistors N0 and N2, or the transistors of N1 and N2 are conducted to GND, so that the OUTA and the microcontroller OUTC, or the low levels b and OUTC, respectively, of the SOC OUTA and OUTC; the low output level at the OUTC port of the SOC microcontroller causes the boost ignition module of fig. 1 to start operating; after the stove is ignited for a few seconds, the thermocouple in the figure 1 is heated to a certain temperature, and then certain electromotive force is generated at the two ends of the thermocouple to keep the gas valve of the stove open; at the moment, the switch S1 and the switch S2 are disconnected, and the stove valve is kept open under the action of the thermocouple to continuously burn.

The working principle of the invention is as follows:

(1) in the standby mode, INA is L, and due to the pull-down resistors in the INA and INB ports, when the S1 switch and the S2 switch are both off, INA and INB are both low, and all internal circuits including transistors are in an off state, so that the circuits consume extremely low current. At this time, the output ports OUTA, OUTB, and OUTC of the SOC microcontroller are all in the high impedance state.

(2) Ignition mode A

When INA is H and INB is L, OUTA outputs low level, OUTB outputs high level, and OUTC outputs low level. The voltage at VCC is 1.5V.

The specific process is as follows: when the S1 switch is closed, the boost module IN the SOC microcontroller starts to work, a VCC port outputs a periodic PWM oscillating signal, the voltage of a VDD port rises to about 2.5V under the action of an L1 inductor, a Z5 diode, a C6 capacitor connected with the Z5 diode and a C7 capacitor, so that a general MCU IN the SOC microcontroller starts to work, the general MCU detects the high level of an INA _ IN port, the general MCU outputs the high level at the INA _ OUT port, the INC _ OUT port also outputs the high level, and at the same time, transistors N0 and N2 are conducted to GND, so that the ports OUTA and OUTC of the SOC microcontroller output the low level. Because the OUTC port outputs low level, the high-frequency oscillator connected with the OUTC port starts to work, and the secondary side of the T1 transformer generates an alternating current high-voltage signal which is shaped by a D2 diode and then charges a C2 capacitor. When the voltage of the negative end of the D3 diode reaches about 150V, the D3 diode is broken down and conducted, the conduction internal resistance of the D3 diode is small, the C2 capacitor discharges through the primary coil of the T2 transformer, the discharging time is short, the current is large, so that high voltage can be generated on the secondary side of the T2 transformer and can reach over 10KV, and the secondary coil of the T2 transformer is connected with an ignition needle of a kitchen range, so that spark discharging is generated on the ignition needle, and ignition is realized. When the C2 capacitor discharges to a certain degree, the voltage of the negative terminal of the D3 diode is less than 150V, the D3 diode does not break down any more, the internal resistance is large, the C2 capacitor continues to charge until the D3 diode is broken down again to discharge, ignition is carried out, and the steps are repeated, so that the continuous interval ignition effect can be realized.

(3) Ignition mode B

When INA is L and INB is H, OUTA outputs high impedance, OUTB outputs low impedance, and OUTC outputs low impedance. The specific process is the same as ignition mode A.

The specific process is as follows: when the S2 switch is closed, the boost module IN the SOC microcontroller starts to work, a VCC port outputs a periodic PWM oscillating signal, the voltage of a VDD port rises to about 2.5V under the action of an L1 inductor, a Z5 diode, a C6 capacitor connected with the Z5 diode and a C7 capacitor, so that a general MCU IN the SOC microcontroller starts to work, the general MCU detects the high level of an INB _ IN port, the general MCU outputs the high level at an INB _ OUT port, the INC _ OUT port also outputs the high level, and at the same time, transistors N1 and N2 are conducted to GND, so that the OUTB and OUTC of the SOC microcontroller output the low level. Because the OUTC port outputs low level, the high-frequency oscillator connected with the OUTC port starts to work, and the secondary side of the T1 transformer generates an alternating current high-voltage signal which is shaped by a D2 diode and then charges a C3 capacitor. When the voltage of the negative end of the D3 diode reaches about 150V, the D3 diode is broken down and conducted, the conduction internal resistance of the D3 diode is small, the C3 capacitor discharges through the primary coil of the T3 transformer, the discharging time is short, the current is large, so that high voltage can be generated on the secondary side of the T3 transformer and can reach over 10KV, and the secondary coil of the T3 transformer is connected with an ignition needle of a kitchen range, so that spark discharging is generated on the ignition needle, and ignition is realized. When the C3 capacitor discharges to a certain degree, the voltage of the negative terminal of the D3 diode is less than 150V, the D3 diode does not break down any more, the internal resistance is large, the C3 capacitor continues to charge until the D3 diode is broken down again to discharge, ignition is carried out, and the steps are repeated, so that the continuous interval ignition effect can be realized.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. Monocell thermocouple cooking utensils ignition control circuit, including high frequency oscillator and the SOC microcontroller who is connected with the high frequency oscillator input, its characterized in that: the output ends of the S1 switch and the S2 switch are respectively connected with the input end of the SOC microcontroller through resistors, the output ends of the S1 switch and the S2 switch are respectively connected with two groups of boosting ignition modules through a D4 diode and a D5 diode, and the output ends of the D4 diode and the D5 diode are respectively connected with VCC through a D6 diode and a D7 diode; two output ends of the SOC microcontroller are respectively connected with VCC through an L2 thermocouple and an L3 thermocouple, the output end of the SOC microcontroller is connected with the high-frequency oscillator through an R1 resistor, and the high-frequency oscillator is connected with the two groups of boosting ignition modules;

the SOC microcontroller comprises a general MCU, a boosting module and a plurality of heavy-current driving NMOS transistors.

2. The single cell thermocouple hob ignition control circuit of claim 1, characterized in that: the S1 switch output terminal is connected with the INA input port of the SOC microcontroller through an R5 resistor, and the S2 switch output terminal is connected with the INB input port of the SOC microcontroller through an R7 resistor.

3. The single cell thermocouple hob ignition control circuit of claim 2, characterized in that: the high-frequency oscillator comprises a C1 capacitor, a Q1 triode and a T1 transformer, one end of a primary coil of the high-frequency oscillator is connected to an OUTC end of the SOC microcontroller through an R1 resistor, an output end of the T1 transformer is connected with a D2 diode in series, and an output end of the D2 diode is connected with a D3 diode and two groups of boosting ignition modules.

4. The single cell thermocouple hob ignition control circuit of claim 3, characterized in that: the two groups of boosting ignition modules respectively comprise a C2 capacitor, a T2 transformer, a C3 capacitor and a T3 transformer, the primary side output end of the T2 transformer is connected with the output end of a D4 diode, and the primary side output end of the T3 transformer is connected with the output end of a D5 diode.

5. The single cell thermocouple hob ignition control circuit of claim 3, characterized in that: the L2 thermocouple and the L3 thermocouple are connected to OUTA and OUTB terminals, respectively, of the SOC microcontroller.

6. The single cell thermocouple hob ignition control circuit of claim 1, characterized in that: VCC anodal is connected with L1 inductance, SOC microcontroller's VCC port and Z5 diode are connected respectively to the output of L1 inductance, SOC microcontroller's VDD port is connected to the output of Z5 diode and there are C6 electric capacity and C7 electric capacity in parallel, the other end of C6 electric capacity and C7 electric capacity is ground connection respectively.

7. The single cell thermocouple hob ignition control circuit of claim 2, characterized in that: the INA port and the INB port are respectively connected with pull-down resistors RA and RB, meanwhile, the INA port and the INB port are respectively connected with the INA _ IN port and the INB _ IN port of the general MCU, and the other ends of the two pull-down resistors RA and RB are respectively grounded.

8. The single cell thermocouple hob ignition control circuit of claim 7, characterized in that: the INA port and the INB port are connected to the input end of a logic OR gate, the output end of the logic OR gate is connected with the enabling end of the boost module, and the CPOUT port of the boost module is connected to the VCC port of the SOC microcontroller; and the VDD port of the boosting module and the VDD port of the general MCU are commonly connected to the VDD port of the SOC microcontroller.

9. The single cell thermocouple hob ignition control circuit of claim 8, characterized in that: the INA _ OUT, INB _ OUT and INC _ OUT ports of the general MCU are respectively connected to the grid electrode of the high-current drive NMOS transistor; the source ends of the large-current drive NMOS transistors are connected to GND together, and the drain ends of the large-current drive NMOS transistors are connected with the OUTA, OUTB and OUTC ends of the SOC microcontroller respectively.