Circuit structure of electric flame stove

Abstract

The invention relates to a circuit structure of an electric flame stove. The circuit structure comprises a high-voltage transformer, an inductor series unit, a voltage doubling rectifying circuit, a plurality of plasma torches, a furnace end mute control circuit, a driving circuit and a control module, the control module comprises a control knob, a main control circuit and a furnace end mute control circuit for controlling the driving circuit; the control knob is connected with the main control circuit, the main control circuit is connected with the furnace end mute control circuit, the output end of the furnace end mute control circuit is connected with the driving circuit, the output end of the driving circuit is connected with the input end of the high-voltage transformer, and the output end of the high-voltage transformer is connected with the inductor series unit; the voltage-multiplying rectifying circuit comprises a plurality of groups of voltage-multiplying rectifying units which are arranged in parallel, the number of the plasma torches is consistent with that of the voltage-multiplying rectifying units, and each group of voltage-multiplying rectifying unit is electrically connected between the inductor series unit and the single plasma torch; the power is adjusted in a silent mode, noise is not generated, and the use experience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric flame range circuit structures, in particular to an electric flame range circuit structure. Background Art

[0002] As a new technology, electric flame stoves still have many shortcomings and technical defects.

[0003] For example, the patent with application number 201910967117X discloses an ionization combustion circuit and an electric flame stove.

[0004] The ionization combustion circuit includes a power supply module, a voltage conversion module, a voltage doubler rectifier module, an ignition module and a combustion module; the power supply module is used to provide an input voltage; the voltage conversion module is connected to the power supply module and is used to convert the input voltage into a driving voltage; the voltage doubler rectifier module is connected to the power supply module and is used to convert the input voltage into a driving voltage.

[0005] The voltage conversion module is connected to generate a rectified voltage according to the driving voltage; the ignition module is connected to the voltage doubling rectifier module to start an arc according to the rectified voltage; the combustion module is connected to the voltage conversion module to discharge to the ground according to the driving voltage.

[0006] Since the voltage doubler rectifier module increases the driving voltage by N times to generate a rectified voltage, the ignition module is used to ignite the arc according to the rectified voltage. When the ignition module breaks down the air, the combustion module discharges to the ground under the drive of the driving voltage to keep the heat source burning continuously, so that only the ignition module needs to be ignited.

[0007] The module performs high-voltage arc ignition, while the combustion module maintains combustion under the drive of a lower driving voltage, which reduces the working power of the circuit, saves energy, and reduces the high-voltage resistance requirements of the device, thereby reducing costs.

[0008] The existing electric flame stove will make noise when the knob is adjusted, which affects the user's experience. In addition, the existing high-voltage package lacks ground protection and has poor safety.

[0009] Therefore, in the patent application of the present invention, the applicant carefully studied a circuit structure of an electric flame stove to solve the above problems. Summary of the invention

[0010] The present invention aims to overcome the deficiencies in the prior art and has the main purpose of providing an electric flame stove circuit structure, which is silent when adjusting power and does not generate noise, thereby improving the user experience.

[0011] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme:

[0012] An electric flame stove circuit structure includes a high-voltage transformer, an inductor series unit, a voltage-doubling rectifier circuit, a plurality of plasma torches, a stove head mute control circuit, a drive circuit for driving the high-voltage transformer, and a control module for controlling the drive circuit;

[0013] The control module includes a control knob, a main control circuit and a furnace head mute control circuit for controlling the drive circuit;

[0014] The control knob is connected to the main control circuit, the main control circuit is connected to the furnace head mute control circuit, the furnace head mute control circuit output end is connected to the drive circuit, the output end of the drive circuit is connected to the input end of the high-voltage transformer, and the output end of the high-voltage transformer is connected to the inductor series unit;

[0015] The voltage-doubling rectifier circuit includes a plurality of groups of voltage-doubling rectifier units arranged in parallel, the number of the plasma torches is consistent with the number of the voltage-doubling rectifier units, and each group of the voltage-doubling rectifier units is electrically connected between the inductor series unit and a single plasma torch.

[0016] As a preferred solution, the furnace head silent control circuit comprises a PWM waveform generating circuit, a first switch circuit, a second switch circuit and a DAC circuit for digital-to-analog conversion;

[0017] The main control circuit is connected to the PWM waveform generating circuit via the DAC circuit, and the PWM waveform generating circuit is connected to the driving circuit via the first switch circuit and the second switch circuit.

[0018] As a preferred solution, the driving circuit includes a VCC voltage conversion circuit, a first driving circuit and a second driving circuit respectively connected to the positive and negative electrodes of the input end of the high-voltage transformer;

[0019] The first drive circuit and the second drive circuit both include a switching transformer and a third switching circuit connected in sequence, the input end of the switching transformer is connected to the output end of the burner mute control circuit and the VCC voltage end of the VCC voltage conversion circuit, and the output end of the third switching circuit is connected to the corresponding pole of the high-voltage transformer input end.

[0020] As a preferred solution, the third switch circuit includes a first MOS transistor, a second MOS transistor, a first diode, a second diode, a first resistor, a second resistor, a third resistor and a fourth resistor;

[0021] The primary side of the switching transformer is connected to the output end of the stove head mute control circuit and the VCC voltage end of the VCC voltage conversion circuit, the cathode of the first diode is connected to the pin 10 of the secondary side of the switching transformer through the first resistor, the anode of the first diode is connected to the pin 10 of the secondary side of the switching transformer through the second resistor, the gate of the first MOS tube is connected to the anode of the first diode, the drain of the first MOS tube is used to connect to the positive electrode of the direct current, the pin 9 of the secondary side of the switching transformer and the drain of the second MOS tube are commonly connected to the source of the first MOS tube, and the source of the first MOS tube is connected to the corresponding pole of the input end of the high-voltage transformer;

[0022] The cathode of the second diode is connected to pin 6 on the secondary side of the switching transformer through a fourth resistor, the anode of the second diode is connected to pin 6 on the secondary side of the switching transformer through a third resistor, the gate of the second MOS tube is connected to the anode of the second diode, and the source of the second MOS tube and pin 7 on the secondary side of the switching transformer are both grounded.

[0023] As a preferred solution, the output end of the third switch circuit of the first drive circuit is connected to the positive electrode of the input end of the high-voltage transformer through a capacitor parallel circuit.

[0024] As a preferred solution, the voltage doubling rectifier unit includes a first capacitor series unit composed of a plurality of first capacitors connected in series, a second capacitor series unit composed of a plurality of second capacitors connected in series, a third capacitor series unit composed of a plurality of third capacitors connected in series, a forward series unit composed of a plurality of first fast recovery diodes connected in forward direction in series, and a reverse series unit composed of a plurality of second fast recovery diodes connected in reverse direction in series;

[0025] The inductor series unit is grounded via a first capacitor series unit, and the inductor series unit is also connected to a plasma torch via a second capacitor series unit;

[0026] The negative output end of the high-voltage transformer is connected to one end of the third capacitor series unit, the other end of the third capacitor series unit is connected to one end of the forward series unit, the other end of the forward series unit is connected to the plasma torch, the other end of the third capacitor series unit is also connected to one end of the reverse series unit, and the other end of the reverse series unit is grounded.

[0027] As a preferred solution, it further includes a ground protection circuit, which includes a fourth capacitor series unit composed of a plurality of fourth capacitors connected in series and a resistor series unit composed of a plurality of fifth resistors connected in series;

[0028] The inductor series unit is connected to the positive output terminal of the high-voltage transformer through the fourth capacitor series unit, the inductor series unit is connected to one end of the resistor series unit, and the other end of the resistor series unit is grounded through two Y capacitors.

[0029] As a preferred solution, it also includes a furnace head air intake fan and a furnace head air intake fan control circuit for controlling the furnace head air intake fan;

[0030] The furnace head air intake fan control circuit includes a main control circuit, a power sampling circuit for obtaining furnace head power, and a wind speed control circuit for receiving a PWM signal and controlling the furnace head air intake fan;

[0031] The wind speed control circuit is connected to the furnace head air intake fan, and the main control circuit is respectively connected to the power sampling circuit and the wind speed control circuit to output a corresponding PWM signal to the wind speed control circuit after receiving a signal from the power sampling circuit, thereby controlling the speed of the furnace head air intake fan.

[0032] As a preferred solution, the wind speed control circuit includes a resistor R32, a resistor R25, a transistor Q8, and a current limiting resistor having one end connected to a 3.3V voltage terminal or a 5V voltage terminal;

[0033] The collector of transistor Q8 is used to connect to the stove head air intake fan, and the other end of the current limiting resistor is connected to the collector of transistor Q8;

[0034] The emitter of the transistor Q8 is grounded, the base of the transistor Q8 is connected to the main control circuit via the resistor R25, and the main control circuit is grounded via the resistor R32.

[0035] As a preferred solution, the first switch circuit and the second switch circuit both include a switch MOS tube, a fifth resistor, a sixth resistor, a seventh resistor and a first capacitor;

[0036] The gate of the switch MOS tube is connected to the output end of the PWM waveform generating circuit through the sixth resistor, the gate of the switch MOS tube is also connected to its source through the seventh resistor, the source of the switch MOS tube is connected to the signal ground, the fifth resistor and the first capacitor are connected in series, the non-series node of the fifth resistor is connected to the drain of the switch MOS tube, the drain of the switch MOS tube is connected to the driving circuit, and the non-series node of the first capacitor is connected to the source of the switch MOS tube.

[0037] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it mainly realizes silence when adjusting the power through the stove head silent control circuit, does not generate noise, and improves the user experience.

[0038] Furthermore, the high-voltage package is grounded through the grounding protection circuit, which greatly improves the safety of use.

[0039] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1It is a control principle block diagram of an embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of a furnace head silent control circuit according to an embodiment of the present invention;

[0042] Figure 3 is a circuit schematic diagram of a high-voltage transformer and an inductor series unit according to an embodiment of the present invention;

[0043] Figure 4 It is a schematic diagram of a local fan speed regulation circuit according to an embodiment of the present invention;

[0044] Figure 5 It is a schematic diagram of a main control circuit of an embodiment of the present invention;

[0045] Figure 6 is a schematic diagram of a voltage doubler rectifier circuit according to an embodiment of the present invention;

[0046] Figure 7 It is a schematic diagram of a ground protection circuit according to an embodiment of the present invention;

[0047] Figure 8 is a schematic diagram of a driving circuit according to an embodiment of the present invention;

[0048] Fig. 9 It is a schematic diagram of a control knob circuit according to an embodiment of the present invention.

[0049] Description of Figure Numbers:

[0050] 11. Furnace head silent control circuit

[0051] 111. DAC circuit 112. Encoding knob switch

[0052] 113. PWM waveform generating circuit 114. First switching circuit

[0053] 115. Second switch circuit 116. Output interface circuit

[0054] 12. Driving circuit 121. VCC voltage conversion circuit

[0055] 122. First drive circuit 123. Second drive circuit

[0056] 124. Switching transformer 125. Third switching circuit

[0057] 13. High voltage transformer

[0058] 14. Inductor series unit 15. Voltage doubler rectifier circuit

[0059] 151. Voltage doubler rectifier unit

[0060] 16. Plasma torch 17. Main control circuit

[0061] 18. Fan speed control circuit

[0062] 181. Power sampling circuit 182. Wind speed control circuit

[0063] 183. Furnace air intake fan 184. Fan interface circuit

[0064] 185, 5V voltage conversion circuit 186, 3.3V voltage conversion circuit

[0065] 19. Ground protection circuit. DETAILED DESCRIPTION

[0066] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0067] like Figures 1 to 9 As shown, an electric flame stove circuit structure includes a high-voltage transformer T113, an inductor series unit 14, a voltage doubler rectifier circuit 15, a plurality of plasma torches 16, a stove head mute control circuit 11, a drive circuit 12 for driving the high-voltage transformer T113, and a control module for controlling the drive circuit;

[0068] The control module includes a control knob, a main control circuit and a furnace head mute control circuit for controlling the drive circuit;

[0069] The control knob is connected to the main control circuit, the main control circuit is connected to the burner mute control circuit, and the output end of the burner mute control circuit is connected to the drive circuit 12. In this embodiment, the burner mute control circuit 11 includes a PWM waveform generating circuit 113, a first switch circuit 114, a second switch circuit 115 and a DAC circuit 111 for digital-to-analog conversion;

[0070] The main control circuit is connected to the PWM waveform generating circuit 113 via the DAC circuit 111 , and the PWM waveform generating circuit 113 is connected to the driving circuit 12 via the first switch circuit 114 and the second switch circuit 115 .

[0071] The DAC circuit 111 is used to receive the set gear parameters, and the set gear parameters are sent by the ADC pin of the main control circuit after the control knob is rotated. The DAC circuit 111 is composed of a chip U6, a transistor Q9 and its peripheral circuits. The model of the chip U6 is LM358, and of course it can also be other models, which are not limited here. The signal input end of the chip U6 is connected to the main control circuit through a third-order low-pass filter circuit. The third-order low-pass filter circuit includes a resistor R765, a resistor R764, a resistor R763, a capacitor C384, a capacitor C383 and a capacitor C382.

[0072] After receiving the set gear parameters from the main control circuit, the chip U6 outputs an analog voltage that matches the set gear parameters.

[0073] The first switch circuit 114 and the second switch circuit 115 each include a switch MOS tube, a fifth resistor, a sixth resistor, a seventh resistor and a first capacitor;

[0074] The gate of the switch MOS tube is connected to the output end of the PWM waveform generating circuit 113 through the sixth resistor, and the gate of the switch MOS tube is also connected to its source through the seventh resistor. The source of the switch MOS tube is connected to the signal ground, the fifth resistor and the first capacitor are connected in series, the non-series node of the fifth resistor is connected to the drain of the switch MOS tube, the drain of the switch MOS tube is connected to the driving circuit, and the non-series node of the first capacitor is connected to the source of the switch MOS tube.

[0075] The output end of the DAC circuit 111 is connected to the input end of the PWM waveform generating circuit 113 to output a preset voltage value according to the set gear parameter, and output the preset voltage value to the PWM waveform generating circuit 113 .

[0076] The PWM waveform generating circuit 113 is used to perform PWM modulation control on the input signal, and can output a high-frequency PWM driving signal with a smaller pulse width.

[0077] The PWM waveform generating circuit 113 is composed of a chip U7 and its peripheral circuits. The model of the chip U7 is SG3525, and of course it can be other models, which are not limited here. The PWMA pin of the chip U7 is connected to the gate of the switch MOS tube Q1 of the first switch circuit through the sixth resistor R756, and the PWMB pin of the chip U7 is connected to the gate of the switch MOS tube Q2 of the second switch circuit through the sixth resistor R757.

[0078] It mainly involves the cooperation of the PWM waveform generating circuit 113, the DAC circuit 111, the first switching circuit and the second switching circuit, which enables the pulse width modulation circuit to continuously output a high-frequency PWM driving signal with a smaller pulse width, so as to ensure that the burner head will not generate a large-span arc when the gear is adjusted, and then no noise will be generated, thereby improving the user experience.

[0079] In this embodiment, the first switch circuit 114 and the second switch circuit 115 are connected to the drive circuit 12 via the output interface circuit 116. The output interface circuit 116 includes an interface J6, a magnetic bead FB6, a magnetic bead FB3, a bidirectional voltage regulator diode D4 and a polarity capacitor C195;

[0080] Pin 1 of the interface J6 is connected to one end of the bidirectional voltage regulator diode D4, the other end of the bidirectional voltage regulator diode D4 and pin 2 of the interface J6 are grounded together through the magnetic bead FB6, pin 3 of the interface J6 is connected to the signal ground, pin 4 of the interface J6 is connected to the drain of the switch MOS tube Q1 of the first switch circuit, and pin 5 of the interface J6 is connected to the drain of the switch MOS tube Q2 of the second switch circuit.

[0081] In this embodiment, the input end of the driving circuit is connected to the interface JP1 for adapting the interface J6. The first switch circuit 114 and the second switch circuit 115 are both connected to the input end of the driving circuit 12 through the output interface circuit 116 and the interface JP1.

[0082] Pin 5 of interface JP1 is connected to pin 1 of interface J6, pin 4 of interface JP1 is connected to pin 2 of interface J6, pin 3 of interface JP1 is connected to pin 3 of interface J6, pin 2 of interface JP1 is connected to pin 4 of interface J6, and pin 1 of interface JP1 is connected to pin 5 of interface J6.

[0083] Pin 5 of the interface JP1 is connected to the VCC voltage terminal, which is also the VDD12V voltage terminal. Pin 4 and pin 3 of the interface JP1 are both grounded.

[0084] The output end of the driving circuit 12 is connected to the input end of the high-voltage transformer T113 (also shown as the high-voltage transformer T1T1 in the figure). In this embodiment, the driving circuit 12 includes a VCC voltage conversion circuit 121, a first driving circuit 122 and a second driving circuit 123 respectively connected to the inductor series units 14.

[0085] The first drive circuit 122 and the second drive circuit 123 both include a switch transformer 124 and a third switch circuit 125 connected in sequence, the input end of the switch transformer 124 is connected to the output end of the burner mute control circuit and the VCC voltage end of the VCC voltage conversion circuit 121, and the output end of the third switch circuit 125 is connected to the corresponding pole of the input end of the high-voltage transformer T113.

[0086] The third switch circuit 125 includes a first MOS transistor, a second MOS transistor, a first diode, a second diode, a first resistor, a second resistor, a third resistor and a fourth resistor;

[0087] The primary side of the switch transformer 124 is connected to the output end of the furnace head mute control circuit and the VCC voltage end of the VCC voltage conversion circuit 121 .

[0088] In this embodiment, pin 2 of the interface JP1 is simultaneously connected to pin 1 of the primary side of the switch transformer 124 of the first drive circuit 122 and pin 5 of the primary side of the switch transformer 124 of the second drive circuit 123, and pin 1 of the interface JP1 is simultaneously connected to pin 1 of the primary side of the switch transformer 124 of the second drive circuit 123 and pin 5 of the primary side of the switch transformer 124 of the first drive circuit 122. Pin 2 and pin 4 of the primary side of the switch transformer 124 are both connected to the VCC voltage terminal, and pin 4 of the primary side of the switch transformer 124 is left unconnected.

[0089] The cathode of the first diode is connected to the pin 10 of the secondary side of the switching transformer 124 through the first resistor, the anode of the first diode is connected to the pin 10 of the secondary side of the switching transformer 124 through the second resistor, the gate of the first MOS tube is connected to the anode of the first diode, the drain of the first MOS tube is used to connect to the positive electrode of the direct current, the pin 9 of the secondary side of the switching transformer 124 and the drain of the second MOS tube are commonly connected to the source of the first MOS tube, and the source of the first MOS tube is connected to the corresponding pole of the input end of the high-voltage transformer T113;

[0090] The cathode of the second diode is connected to pin 6 on the secondary side of the switching transformer 124 through the fourth resistor, the anode of the second diode is connected to pin 6 on the secondary side of the switching transformer 124 through the third resistor, the gate of the second MOS tube is connected to the anode of the second diode, and the source of the second MOS tube and pin 7 on the secondary side of the switching transformer 124 are both grounded.

[0091] The output end of the third switch circuit 125 of the first drive circuit 122 is connected to the positive electrode (ie, J3 in the figure) of the input end of the high-voltage transformer T113 through a capacitor parallel circuit. The capacitor parallel circuit includes capacitors C3 to C8 connected in parallel.

[0092] The output end of the third switch circuit 125 of the second drive circuit 123 is connected to the negative electrode (ie, J4 in the figure) of the input end of the high-voltage transformer T113.

[0093] The output end of the high-voltage transformer T113 is connected to the inductor series unit 14; the inductor series unit 14 includes at least N energy storage inductors connected in series, the first end of the first energy storage inductor is connected to the output end of the high-voltage transformer T1, the second end of the Nth energy storage inductor is the high-voltage package for the electric flame stove and the output end of the electric flame stove, and the second end of the Mth energy storage inductor is connected to the first end of the M+1th energy storage inductor; wherein N is an integer greater than or equal to 2, and M is an integer less than N. The number of secondary turns of the high-voltage transformer T1 decreases as the number of energy storage inductors increases. The inductance values ​​of the N energy storage inductors are equal. Preferably, three energy storage inductors are provided.

[0094] If a traditional high-voltage transformer T1 without an inductor series unit needs to output a 10KV voltage, taking the output voltage of the high-voltage transformer T1 as 58V and the number of turns as 2 turns, at this time, the secondary of the high-voltage transformer T1 needs to be wound about 530 turns to achieve an output voltage of 10KV.

[0095] In this embodiment, after three series-connected energy storage inductors (with an inductance of 200 to 300 μH) are connected in series with the high-voltage transformer T113, the secondary turns of the high-voltage transformer T113 can be reduced to 100 turns, or even fewer turns to achieve a 10KV voltage output, thereby reducing costs and the overall volume of the traditional high-voltage transformer T1. The energy storage inductor needs to adjust its inductance and turns according to the voltage output by the secondary of the high-voltage transformer T1 to meet the actual required voltage and waveform.

[0096] By connecting an inductor series unit in series at the output end of the high-voltage transformer T1, the voltage can be increased through inductor energy storage, thereby reducing the number of secondary turns of the high-voltage transformer T1, which is beneficial to the heat dissipation of the high-voltage transformer T1 and reduces the cost of the high-voltage transformer T1.

[0097] The voltage doubler rectifier circuit 15 includes a plurality of groups of voltage doubler rectifier units 151 arranged in parallel. The number of the plasma torches 16 is consistent with the number of the voltage doubler rectifier units 151 . Each group of voltage doubler rectifier units 151 is electrically connected between the inductor series unit 14 and a single plasma torch 16 .

[0098] The voltage doubling rectifier unit includes a first capacitor series unit composed of a plurality of first capacitors connected in series, a second capacitor series unit composed of a plurality of second capacitors connected in series, a third capacitor series unit composed of a plurality of third capacitors connected in series, a forward series unit composed of a plurality of first fast recovery diodes connected in forward direction in series, and a reverse series unit composed of a plurality of second fast recovery diodes connected in reverse direction in series;

[0099] The inductor series unit 14 is grounded through a first capacitor series unit, and the inductor series unit 14 is also connected to a plasma torch 16 through a second capacitor series unit;

[0100] The negative output end of the high-voltage transformer T113 is connected to one end of the third capacitor series unit, the other end of the third capacitor series unit is connected to one end of the forward series unit, the other end of the forward series unit is connected to the discharge needle, the other end of the third capacitor series unit is also connected to one end of the reverse series unit, and the other end of the reverse series unit is grounded.

[0101] It also includes a ground protection circuit 19, which includes a fourth capacitor series unit composed of a plurality of fourth capacitors connected in series and a resistor series unit composed of a plurality of fifth resistors connected in series;

[0102] The inductor series unit 14 is connected to the positive output terminal of the high-voltage transformer T113 through the fourth capacitor series unit. The inductor series unit 14 is connected to one end of the resistor series unit, and the other end of the resistor series unit is grounded through two Y capacitors.

[0103] The fan controller also includes a main control circuit 17 and a fan speed regulating circuit 18. The main control circuit 17 is connected to the fan speed regulating circuit 18.

[0104] It also includes a furnace head air intake fan 183 and a furnace head air intake fan control circuit for controlling the furnace head air intake fan 183;

[0105] The furnace head air intake fan control circuit includes a main control circuit 17, a power sampling circuit 181 for obtaining furnace head power, and a wind speed control circuit 182 for receiving a PWM signal and controlling a furnace head air intake fan 183;

[0106] The wind speed control circuit 182 is connected to the furnace head air intake fan 183, and the main control circuit 17 is respectively connected to the power sampling circuit 181 and the wind speed control circuit 293 to output a corresponding PWM signal to the wind speed control circuit 293 after receiving a signal from the power sampling circuit 181, thereby controlling the rotation speed of the furnace head air intake fan 183.

[0107] The power sampling circuit 181 includes an interface J1, a resistor R777, a capacitor C391, a magnetic bead FB7, a sampling chip U9, a capacitor C392, a resistor R774, a resistor R775, a resistor R776 and a mutual inductor L1001;

[0108] Pin 1 and pin 2 of interface J1 are connected to pin 3 and pin 1 of transformer L1001 respectively; two current sampling pins of sampling chip U9 are connected to pin 4 and pin 2 of transformer L1001 through resistor R775 and resistor R776 respectively. The voltage collection pin of sampling chip U9 is connected to pin 3 of interface J1 through resistor R777, and the voltage collection pin of sampling chip U9 is grounded through capacitor C391. Pin 4 of interface J1 is grounded through magnetic bead FB7.

[0109] In this embodiment, the power of the burner can be obtained by collecting the voltage across the resistor R13 and the current passing through the resistor R3.

[0110] The driving circuit 12 also includes a resistor R12 and a resistor R13 connected in series, and an interface JP2 adapted to the interface J1. Pins 5, 4, 3, 2, and 1 of the interface JP2 are respectively connected to pins 1, 2, 3, 4, and 5 of the interface J1 in a one-to-one correspondence. Pin 5 of the interface JP2 is connected to the third switch circuit and the GNDA end of the VCC voltage conversion circuit. The GNDA end of the VCC voltage conversion circuit is also grounded through the resistor R5. Pin 4 of the interface JP2 is grounded. The series node of the resistor R12 and the resistor R13 is connected to pin 3 of the interface JP2. The non-series node of the resistor R13 is connected to the VIN end of the VCC voltage conversion circuit. The non-series node of the resistor R12 is connected to pin 2 of the interface JP2, and pin 2 of the interface JP2 is grounded.

[0111] The wind speed control circuit 182 includes a resistor R32, a resistor R25, a transistor Q8, and a current limiting resistor for connecting one end to a 3.3V voltage terminal or a 5V voltage terminal;

[0112] The collector of transistor Q8 is used to connect to the stove head air intake fan, and the other end of the current limiting resistor is connected to the collector of transistor Q8;

[0113] The emitter of the transistor Q8 is grounded, the base of the transistor Q8 is connected to the main control circuit via the resistor R25, and the main control circuit is grounded via the resistor R32.

[0114] When the furnace head air intake fan is a furnace head air intake fan with an operating voltage of 5V, the current limiting resistor is connected to the 5V voltage terminal (such as VDD5V in the figure) and the current limiting resistor is the resistor R18 in the figure.

[0115] When the furnace head air intake fan is a furnace head air intake fan with an operating voltage of 3.3V (such as VDD3V3 in the figure), the current limiting resistor is connected to the 3.3V voltage terminal and the current limiting resistor is the resistor R749 in the figure.

[0116] The emitter of the transistor Q8 is grounded, the base of the transistor Q8 is connected to the main control circuit via the resistor R25, and the main control circuit is grounded via the resistor R32.

[0117] The wind speed control circuit 182 also includes a fan interface circuit 184, a 5V voltage conversion circuit 185 for providing a 5V operating voltage, and a 3.3V voltage conversion circuit 186 for providing a 3.3V operating voltage;

[0118] The fan interface circuit 184 includes a diode D13, a magnetic bead FB4, a magnetic bead FB8, a magnetic bead FB5, a resistor R46, and an interface J3 for connecting the furnace head air intake fan;

[0119] The positive electrode of the diode D13 is connected to the VDD12 voltage terminal through the magnetic bead FB4, the negative electrode of the diode D13 is connected to the pin 1 of the interface J3, the pin 2 of the interface J3 is grounded through the magnetic bead FB8, the pin 3 of the magnetic bead FB8 is connected to the collector of the transistor Q8 through the magnetic bead FB5, and the pin 4 of the interface J3 is connected to the main control circuit 17 through the resistor R46 to feed back the information of the furnace head air intake fan to the main control circuit.

[0120] The output end of the 5V voltage conversion circuit 185 is a 5V voltage end, and the output end of the 3.3V voltage conversion circuit 186 is a 3.3V voltage end.

[0121] The key point of the design of the present invention is that it mainly realizes the silencing of the burner head when adjusting the power through the burner head silent control circuit, does not generate noise, and improves the user experience.

[0122] Furthermore, the high-voltage package is grounded through the grounding protection circuit, which greatly improves the safety of use.

[0123] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An electric flame stove circuit structure, characterized in that: It includes a high-voltage transformer, an inductor series unit, a voltage-doubling rectifier circuit, a plurality of plasma torches, a furnace head mute control circuit, a drive circuit for driving the high-voltage transformer, and a control module for controlling the drive circuit; The control module includes a control knob, a main control circuit and a furnace head mute control circuit for controlling the drive circuit; The control knob is connected to the main control circuit, the main control circuit is connected to the furnace head mute control circuit, the furnace head mute control circuit output end is connected to the drive circuit, the output end of the drive circuit is connected to the input end of the high-voltage transformer, and the output end of the high-voltage transformer is connected to the inductor series unit; The voltage-doubling rectifier circuit includes a plurality of groups of voltage-doubling rectifier units arranged in parallel, the number of the plasma torches is consistent with the number of the voltage-doubling rectifier units, and each group of the voltage-doubling rectifier units is electrically connected between the inductor series unit and a single plasma torch.

2. The electric flame stove circuit structure according to claim 1, characterized in that: The furnace head silent control circuit comprises a PWM waveform generating circuit, a first switch circuit, a second switch circuit and a DAC circuit for digital-to-analog conversion; The main control circuit is connected to the PWM waveform generating circuit via the DAC circuit, and the PWM waveform generating circuit is connected to the driving circuit via the first switch circuit and the second switch circuit.

3. The electric flame cooker circuit structure according to claim 1, characterized in that: The driving circuit includes a VCC voltage conversion circuit, a first driving circuit and a second driving circuit respectively connected to the positive and negative electrodes of the input end of the high-voltage transformer; The first drive circuit and the second drive circuit both include a switching transformer and a third switching circuit connected in sequence, the input end of the switching transformer is connected to the output end of the burner mute control circuit and the VCC voltage end of the VCC voltage conversion circuit, and the output end of the third switching circuit is connected to the corresponding pole of the high-voltage transformer input end.

4. The electric flame stove circuit structure according to claim 3, characterized in that: The third switch circuit includes a first MOS transistor, a second MOS transistor, a first diode, a second diode, a first resistor, a second resistor, a third resistor and a fourth resistor; The primary side of the switching transformer is connected to the output end of the stove head mute control circuit and the VCC voltage end of the VCC voltage conversion circuit, the cathode of the first diode is connected to the pin 10 of the secondary side of the switching transformer through the first resistor, the anode of the first diode is connected to the pin 10 of the secondary side of the switching transformer through the second resistor, the gate of the first MOS tube is connected to the anode of the first diode, the drain of the first MOS tube is used to connect to the positive electrode of the direct current, the pin 9 of the secondary side of the switching transformer and the drain of the second MOS tube are commonly connected to the source of the first MOS tube, and the source of the first MOS tube is connected to the corresponding pole of the input end of the high-voltage transformer; The cathode of the second diode is connected to pin 6 on the secondary side of the switching transformer through a fourth resistor, the anode of the second diode is connected to pin 6 on the secondary side of the switching transformer through a third resistor, the gate of the second MOS tube is connected to the anode of the second diode, and the source of the second MOS tube and pin 7 on the secondary side of the switching transformer are both grounded.

5. The electric flame cooker circuit structure according to claim 3, characterized in that: The output end of the third switch circuit of the first drive circuit is connected to the positive electrode of the input end of the high-voltage transformer through a capacitor parallel circuit.

6. The electric flame cooker circuit structure according to claim 1, characterized in that: The voltage doubling rectifier unit includes a first capacitor series unit composed of a plurality of first capacitors connected in series, a second capacitor series unit composed of a plurality of second capacitors connected in series, a third capacitor series unit composed of a plurality of third capacitors connected in series, a forward series unit composed of a plurality of first fast recovery diodes connected in forward direction in series, and a reverse series unit composed of a plurality of second fast recovery diodes connected in reverse direction in series; The inductor series unit is grounded via a first capacitor series unit, and the inductor series unit is also connected to a plasma torch via a second capacitor series unit; The negative output end of the high-voltage transformer is connected to one end of the third capacitor series unit, the other end of the third capacitor series unit is connected to one end of the forward series unit, the other end of the forward series unit is connected to the plasma torch, the other end of the third capacitor series unit is also connected to one end of the reverse series unit, and the other end of the reverse series unit is grounded.

7. The electric flame cooker circuit structure according to claim 1, characterized in that: Also included is a ground protection circuit, the ground protection circuit including a fourth capacitor series unit composed of a plurality of fourth capacitors connected in series and a resistor series unit composed of a plurality of fifth resistors connected in series; The inductor series unit is connected to the positive output terminal of the high-voltage transformer through the fourth capacitor series unit, the inductor series unit is connected to one end of the resistor series unit, and the other end of the resistor series unit is grounded through two Y capacitors.

8. The electric flame cooker circuit structure according to claim 1, characterized in that: Also included is a burner head air intake fan and a burner head air intake fan control circuit for controlling the burner head air intake fan; The furnace head air intake fan control circuit includes a power sampling circuit for obtaining furnace head power and a wind speed control circuit for receiving a PWM signal and controlling the furnace head air intake fan; The wind speed control circuit is connected to the furnace head air intake fan, and the main control circuit is respectively connected to the power sampling circuit and the wind speed control circuit to output a corresponding PWM signal to the wind speed control circuit after receiving a signal from the power sampling circuit, thereby controlling the speed of the furnace head air intake fan.

9. The electric flame cooker circuit structure according to claim 8, characterized in that: The wind speed control circuit includes a resistor R32, a resistor R25, a transistor Q8, and a current limiting resistor with one end connected to a 3.3V voltage terminal or a 5V voltage terminal; The collector of transistor Q8 is used to connect to the stove head air intake fan, and the other end of the current limiting resistor is connected to the collector of transistor Q8; The emitter of the transistor Q8 is grounded, the base of the transistor Q8 is connected to the main control circuit via the resistor R25, and the main control circuit is grounded via the resistor R32.

10. The electric flame range circuit structure according to claim 2, characterized in that: The first switch circuit and the second switch circuit both include a switch MOS tube, a fifth resistor, a sixth resistor, a seventh resistor and a first capacitor; The gate of the switch MOS tube is connected to the output end of the PWM waveform generating circuit through the sixth resistor, the gate of the switch MOS tube is also connected to its source through the seventh resistor, the source of the switch MOS tube is connected to the signal ground, the fifth resistor and the first capacitor are connected in series, the non-series node of the fifth resistor is connected to the drain of the switch MOS tube, the drain of the switch MOS tube is connected to the driving circuit, and the non-series node of the first capacitor is connected to the source of the switch MOS tube.

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