TITLE: ELECTRIC FLAME CIRCUIT AND STOVE

INVENTOR: ZHANJIE FU and TAN GANG HANG ZHANJIE

FIELD OF THE INVENTION

[0001] The present application relates to the technical field of cooktops, in particular to an electric ignition circuit and an electric fire stove.

BACKGROUND OF THE INVENTION

[0002] Conventional cooking ranges are generally gas stoves, which use a gas flame to heat cookware, or induction stoves that use electromagnetic induction for heating cookware. Gas stoves present potential safety hazards such as contamination, which potentially causes health problems, as seen by recent controversy over gas stoves. Induction stoves avoid the potential for gas poisoning inherent in gas stoves, but present their own problems, such as uneven heating. Due to the problems with induction stoves and other electric stoves, professional cooks often prefer to work with gas stoves.

[0003] In response to the above issues, attempts have been made to create an electric fire stove. There are many potential benefits of such a stove: Since no coal gas is needed, an accident of gas explosion is radically solved, the electric fire stove would be safer and more convenient than the gas stove and the electromagnetic stove, and would not affect the user’s cooking experience. However, at present, attempts at creating an electric fire stove have suffered from complex circuit structure and low circuit reliability.

[0004] In view of the above, it would be advantageous to provide an electric ignition circuit and an electric fire stove with improved reliability of the electric ignition circuit and simplified circuit structure in view of the above-mentioned problems of complicated circuit structure and low circuit reliability in existing electric fire stoves.

SUMMARY OF THE INVENTION

[0005] Disclosed is an electric ignition circuit and an electric flame stove. The electric flame stove is a new kind of stove which converts electric energy into heat energy by a plasma technology, and generates flame by ionizing air to achieve cooking on an open flame. Instead of relying on raw materials such as fuel gas, the electric fire converts the flame with electric energy. The conventional combustion mode is changed: Since no gas is needed, the risk of explosion and other harms is entirely avoided. The electric flame stove is safer and more convenient than the gas stove and the electromagnetic induction stove, and does not affect the user’s cooking experience.

[0006] In the electric ignition circuit, an input terminal of a switching power supply circuit is connected to an external power supply; an input terminal of a booster circuit is connected to an output terminal of a switching power supply circuit; an input terminal of an ion needle module included in an ion needle assembly is connected to a first output terminal of the booster circuit, and an output terminal of the ion needle module is close to an arc-striking (arc-creating) ion generator; the output terminal of the ion needle module forms an ionization point pair with the arc-striking ion generator; a power control circuit is connected to the switching power supply circuit; the power control circuit transmits a PWM signal with a preset duty cycle to the switching power supply circuit, so that the switching power supply circuit outputs a power supply signal to the booster circuit according to the PWM signal with the preset duty cycle; and the booster circuit transmits a booster power supply signal to the ion needle assembly according to the power supply signal to control the ionization point pair to perform ionization arc-striking, thereby achieving ignition with electricity, so that the ion needle assembly generates a flame with an adjustable output power and fire power, simplifying the circuit structure and improving the reliability of the electric ignition circuit.

[0007] More particularly, in order to achieve the above object, an embodiment of the present invention provides an electric ignition circuit including:

[0008] a switching power supply circuit having an input terminal used for connecting an external power supply;

[0009] a booster circuit having a first input terminal and a second input terminal respectively connected to an output terminal of the switching power supply;

[0010] an ion needle assembly including an ion needle module and an arcstriking ion generator; wherein an input terminal of the ion needle module is connected to a first output terminal of the booster circuit, and an output terminal of the ion needle module is close to the arc-striking ion generator; the output terminal of the ion needle module forms an ionization point pair with the arcstriking ion generator;

[0011] a power control circuit connected to a control terminal of the switching power supply circuit and configured to transmit a pulse width modulation (PWM) signal with a preset duty cycle to the switching power supply circuit, so that the switching power supply circuit outputs a power sup'ply signal corresponding to the preset duty cycle to the booster circuit according to the PWM signal with the preset duty cycle, and the booster circuit transmits a booster power supply signal to the ion needle assembly according to the power supply signal to control the ionization point pair to perform ionization arc-striking.

[0012] In one embodiment, the power control circuit includes a processing chip and a power regulation switching circuit; the processing chip is connected to the power regulation switching circuit;

[0013] the power regulation switching circuit is used for regulating the preset duty cycle of the PWM signal so that the processing chip transmits the PWM signal / with the preset duty cycle to the switching power supply circuit.

[0014] In one embodiment, the power regulation switching circuit includes a power regulation switch for regulating the preset duty cycle of the PWM signal; the power regulation switch is a potentiometer or a push-button switch.

[0015] In one embodiment, the switching power supply circuit includes a power supply driving circuit and a power amplifier;

[0016] an input terminal of the power supply driving circuit is connected to the processing chip; an output terminal of the power supply driving circuit is connected to an input terminal of the power amplifier; an output terminal of the power amplifier is connected to the booster circuit.

[0017] In one embodiment, the power supply driving circuit includes a driving chip, a first drive transformation circuit and a second drive transformation circuit; [0018] an input terminal of the driving chip is coupled to the processing chip, and an output terminal of the driving chip is respectively connected to the first drive transformation circuit and the second drive transformation circuit.

[0019] In one embodiment, the power amplifier includes a first switching transistor and a second switching transistor;

[0020] a gate electrode of the first switching transistor is connected to a first output terminal of the first drive transformation circuit, a source electrode of the first switching transistor is connected to a power supply, and a drain electrode of the first switching transistor is respectively connected to a second output terminal of the first drive transformation circuit, a source electrode of the second switching transistor and a first input terminal of the booster circuit; a gate electrode of the second switching transistor is connected to a first output terminal of the second drive transformation circuit, and a drain electrode of the second switching transistor is respectively connected to a ground wire and the second input terminal of the booster circuit.

[0021] In one embodiment, the arc-striking ion generator is provided on a pot ring of an electric fire stove; the pot ring of the electric fire stove is used for supporting a pot to be used, and is fitted to a pot bottom of the pot to be used. [0022] In one embodiment, the ion needle assembly further includes a support mechanism; the ion needle module is provided on the support mechanism; the pot ring of the electric fire stove is provided above the support mechanism and is provided around the ion needle module; and the output terminal of the ion needle module is located below the arc-striking ion generator.

[0023] In one embodiment, the electric ignition circuit further includes a power detection circuit; the power detection circuit includes a voltage transformer, a current transformer, a first signal processing circuit and a second signal processing circuit;

[0024] an input terminal of the voltage transformer is connected to an input terminal of the booster circuit, and an output terminal of the voltage transformer is connected to the first signal processing circuit; the first signal processing circuit is connected to the processing chip; an input terminal of the current transformer is connected to an input terminal of the booster circuit, and an output terminal of the current transformer is connected to a second signal processing circuit; and the second signal processing circuit is connected to the processing chip.

[0025] In another aspect, embodiments of the present invention also provide an electric fire stove including the electric ignition circuit of any of the above.

[0026] One of the above technical solutions has the following advantages and beneficial effects:

[0027] in various embodiments of the above-mentioned electric ignition circuit, the electric ignition circuit includes a switching power supply circuit, a booster circuit, an ion needle assembly and a power control circuit, and an input terminal of the switching power supply circuit is used for connecting to an external power supply; a first input terminal and a second input terminal of the booster circuit are respectively connected to an output terminal of the switching power supply; the ion needle assembly includes an ion needle module and an arc-striking ion generator; an input terminal of the ion needle module is connected to a first output terminal of the booster circuit, and an output terminal of the ion needle module is close to the arc-striking ion generator; the output terminal of the ion needle module forms an ionization point pair with the arc-striking ion generator; the power control circuit is connected to a control terminal of the switching power supply circuit; the power control circuit is configured to transmit a PWM signal with a preset duty cycle to the switching power supply circuit, so that the switching power supply circuit outputs a power supply signal corresponding to the preset duty cycle to the booster circuit according to the PWM signal with the preset duty cycle; and the booster circuit transmits the booster power supply signal to the ion needle assembly according to the power supply signal to control the ionization point pair to perform ionization arc-striking, thereby achieving ignition with electricity. In the present application, the power control circuit controls a duty cycle of the output PWM signal to control the magnitude of the output power of the booster circuit, so that the ion needle assembly can generate an open flame with an adjustable output power and flame magnitude, and realize the functions of cooking by ignition with electricity, etc., thus solving the problem that the existing electromagnetic oven cannot cook on an open flame, simplifying the circuit structure, and improving the reliability of the electric ignition circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The novel features of this invention, as well as the invention itself, both as to its structure and its operation, will be best understood from the accompanying drawings, taken in conjunction with the accompanying description, in which similar reference characters refer to similar parts, and in which:

[0029] FIG. 1 is a schematic diagram showing a first circuit of an electric ignition circuit according to an embodiment;

[0030] FIG. 2 is a schematic diagram showing a second circuit of an electric ignition circuit according to an embodiment;

[0031] FIG. 3 is a schematic diagram showing a third circuit of an electric ignition circuit according to an embodiment;

[0032] FIG. 4 is a schematic diagram showing a fourth circuit of an electric ignition circuit according to an embodiment;

[0033] FIG. 5 is a schematic diagram showing a circuit of a power regulation switching circuit according to an embodiment;

[0034] FIG. 6 is a schematic diagram showing a circuit of a power amplifier according to an embodiment;

[0035] FIG. 7 is a perspective view of a cooktop with an electric ignition circuit; and

[0036] FIG. 8 is a front view of the cooktop in use with cookware.

DETAILED DESCRIPTION [0037] In order to enable a person skilled in the art to better understand the solution of the present application, a clear and complete description of the technical solution of the embodiments of the present application is provided below in conjunction with the accompanying drawings of preferred embodiments of the present application. It will be apparent to one of ordinary skill in the art that the embodiments described are only a selection of exemplary embodiments of the present application, which are intended to provide the person of ordinary skill in the art sufficient explanation to make and use the invention and illustrate the best mode of carrying out the invention currently contemplated by the inventor, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without involving any inventive effort should be considered within the scope of protection of the present application.

[0038] It is noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used are interchangeable under appropriate circumstances for the embodiments of the application described herein. Furthermore, the terms "include" and "has", as well as any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that includes a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

[0039] In addition, the term "a plurality of' shall mean two or more.

[0040] In order to solve the problems of complicated circuit structure and low circuit reliability in the existing electric fire stove, in one embodiment, as shown in FIG. 1 , an electric ignition circuit is provided to include a switching power supply circuit 100, a booster circuit 200, an ion needle assembly 300 and a power control circuit 400.

[0041] An input terminal of the switching power supply circuit 100 is used for connecting an external power supply; a first input terminal and a second input terminal of the booster circuit 200 are respectively connected to an output terminal of a switching power supply; the ion needle assembly 300 includes an ion needle module 310 and an arc-striking ion generator 320; an input terminal of the ion needle module 310 is connected to a first output terminal of the booster circuit 200, and an output terminal of the ion needle module 310 is close to the arc-striking ion generator 320; an output terminal of the ion needle module 310 forms an ionization point pair with the arc-striking ion generator 320; the power control circuit 400 is connected to a control terminal of the switching power supply circuit 100; the power control circuit 400 is configured to transmit a PWM signal with a preset duty cycle to the switching power supply circuit 100, so that the switching power supply circuit 100 outputs a power supply signal corresponding to the preset duty cycle to the booster circuit 200 according to the PWM signal with the preset duty cycle; and the booster circuit 200 transmits a booster power supply signal to the ion needle assembly 300 according to the power supply signal to control the ionization point to perform ionization arcstriking.

[0042] The switching power supply circuit 100 can be used to perform voltage stabilization, filtering and conversion on a power supply signal input by an external power supply, and output a stable power supply signal. An external power supply may be used to provide 220V AC power to the switching power supply. The booster circuit 200 may be used as a transformer circuit to transform a low value alternating voltage into another higher value alternating voltage of the same frequency. For example, an exemplary embodiment of booster circuit 200 includes a booster transformer. In one example, a first output of a booster is a dotted terminal of the booster.

[0043] A preferred embodiment of the ion needle assembly 300 includes an ion needle module 310 and an arc-striking ion generator 320. The output terminal of the ion needle module 310 is provided close to the arc-striking ion generator 320 used to form an ionization point pair with the output terminal of the ion needle module 310, so that when the ion needle module 310 is operated, an electric fire arc-striking can be achieved, thereby forming a flame to provide heat for a pot to be used. When the circuit is powered on for operation, the ion needle module 310 can ionize air according to a booster power supply signal output by the booster circuit 200 to generate a plasma gas flow based on the arc-striking ion generator 320 being used to form an ionization point pair with an output terminal of the ion needle module 310 to achieve electric fire arc-striking. [0044] Illustratively, the ion needle assembly 300 may include at least one ion needle module 310, for example, the ion needle assembly 300 includes a plurality of ion needle modules 310, wherein, in a preferred embodiment, each ion needle module 310 is connected in parallel at a first output terminal of the booster circuit 200, and the output terminals of each ion needle module 310 are respectively provided sufficiently close to the arc-striking ion generator 320 so that the arc-striking ion generator 320 and the output terminals of each path of ion needle modules 310 form an arc-striking loop, and then when the circuit is powered on for operation, each ion needle module 310 can ionize the air according to the booster power supply signal output by the booster circuit 200 to generate a plasma gas flow to achieve electric fire arc-striking, thereby forming a flame to supply heat to the cooker.

[0045] The power control circuit 400 can be used to adjust a preset duty cycle of the PWM signal, and then adjust the magnitude of the output power of the circuit according to the PWM signal with the preset duty cycle to adjust the magnitude of the flame generated by the ionization point pair. Based on the fact that the power control circuit 400 is connected to a control terminal of the switching power supply circuit 100, an output terminal of the switching power supply circuit 100 is respectively connected to a first input terminal and a second input terminal of the booster circuit 200, an input terminal of the ion needle module 310 is connected to a first output terminal of the booster circuit 200, and then the power control circuit 400 can transmit a PWM signal of a preset duty cycle to the switching power supply circuit 100, and the switching power supply circuit 100 receives the PWM signal of the preset duty cycle and outputs a power supply signal corresponding to the preset duty cycle to the booster circuit 200 according to the PWM signal with the preset duty cycle; the booster circuit 200 receives a power supply signal, and transmits the booster power supply signal to the ion needle assembly 300 according to the received power supply signal, so that the ion needle assembly 300 controls the ionization point pair to perform ionization arcstriking according to the booster power supply signal to achieve ignition with electricity, thereby forming a flame to provide heat to the cooker to adjust the output power of the circuit, i.e., to adjust the flame generated by the ionization point pair.

[0046] In one example, a user may manipulate the power control circuit 400 such that the power control circuit 400 outputs a PWM signal with a preset duty cycle, thereby adjusting the magnitude of the output power of the circuit according to the PWM signal with the preset duty cycle, thereby adjusting the magnitude of the flame generated by the ionization point pair. Thus, in a preferred embodiment of a stove using the circuit, the size of the flame, and therefore the amount of heat it transfers to cookware on the stove, is user adjustable.

[0047] In the above-mentioned embodiment, an external power source is connected based on an input terminal of the switching power supply circuit 100; a first input terminal and a second input terminal of the booster circuit 200 are respectively connected to the output terminal of the switching power supply; an input terminal of an ion needle module 310 contained in the ion needle assembly 300 is connected to a first output terminal of the booster circuit 200, and the output terminal of the ion needle module 310 is close to an arc-striking ion generator 320; the output terminal of the ion needle module 310 forms an ionization point pair with the arc-striking ion generator 320; a power control circuit 400 is connected to a control terminal of the switching power supply circuit 100; when the circuit is powered on, the power control circuit 400 can transmit a PWM signal with a preset duty cycle to the switching power supply circuit 100, so that the switching power supply circuit 100 outputs a power supply signal corresponding to the preset duty cycle to the booster circuit 200 according to the PWM signal with the preset duty cycle; and the booster circuit 200 transmits a booster power supply signal to the ion needle assembly 300 according to the power supply signal to control the ionization point pair to perform ionization arcstriking, thereby achieving ignition with electricity. In the present application, the power control circuit 400 controls a duty cycle of the output PWM signal to control the magnitude of the output power of the booster circuit 200, so that the ion needle assembly 300 can generate an open flame with an adjustable output power and flame magnitude, and realize the functions of cooking by ignition with electricity, etc., thus solving the problem that the existing electromagnetic oven cannot cook on an open flame, simplifying the circuit structure, and improving the reliability of the electric ignition circuit.

[0048] In one embodiment, as shown in FIG. 2, the power control circuit 400 includes a processing chip 410 and a power conditioning switching circuit 420. The processing chip 410 is connected to a power regulation switching circuit 420; the power regulation switching circuit 420 is used to regulate the preset duty cycle of the PWM signal so that the processing chip 410 transmits the PWM signal of the preset duty cycle to the switching power supply circuit 100.

[0049] An exemplary embodiment of the processing chip 410 is a Microcontroller Unit (MCU) configured to direct operation of the power regulation switching circuit 420. The power regulation switching circuit 420 may be used to adjust the preset duty cycle of the PWM signal. In one embodiment, the power regulation switching circuit 420 includes a power regulation switch for regulating the preset duty cycle of the PWM signal; and the power regulation switch is a potentiometer or a pushbutton switch. In this exemplary embodiment, the power regulation switch is a potentiometer, and a user can control the potentiometer to realize the regulation of the preset duty cycle of the power regulation switching circuit 420 to the PWM signal, thereby realizing the magnitude of the output power of the regulation circuit and the magnitude of the ionization point pair generating flame power.

[0050] For example, as shown in FIG. 5, a preferred embodiment of the power regulation switching circuit 420 includes a potentiometer interface J1 and a first auxiliary circuit electrically connected to the potentiometer. The first auxiliary circuit includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor 05, a sixth capacitor 06, a seventh capacitor 07, a first resistor R1 and a second resistor R2.

[0051] The potentiometer interface J1 is used for plugging in the potentiometer, so that the potentiometer is electrically connected to the first auxiliary circuit. The potentiometer interface J1 includes a first pin terminal, a first pin terminal, a third pin terminal, a fourth pin terminal, and a fifth pin terminal. The positive electrode of the first capacitor C1 is connected to a VOL pin terminal of the processing chip 410, and the negative electrode of the first capacitor C1 is connected to a ground wire; the positive electrode of the second capacitor C2 is connected to the VOL pin terminal of the processing chip 410, and the negative electrode of the second capacitor C2 is respectively connected to the ground wire, the first pin terminal of the potentiometer interface J1 and the second pin terminal of the potentiometer interface J1. The third pin terminal of the potentiometer interface J1 is connected to the VOL pin terminal of the processing chip 410. A first terminal of the first resistor R1 is connected to a VOL-ON/OFF pin terminal of the processing chip 410, and a second terminal of the first resistor R1 is connected to a fourth pin terminal of the potentiometer interface J1 ; a first terminal of the second resistor R2 is connected to a first power supply pin terminal (such as a +5V pin terminal) of the processing chip 410, and a second terminal of the second resistor R2 is respectively connected to a fourth pin terminal of the potentiometer interface J1, an anode of the third capacitor C3 and a cathode of the third capacitor C3 are connected to the ground wire. A fifth pin terminal of the potentiometer interface J1 is respectively connected to a second power source pin terminal (such as a VCC-3V3 pin terminal) of the processing chip 410, an anode of the fourth capacitor C4, an anode of the fifth capacitor C5, an anode of the sixth capacitor C6 and an anode of the seventh capacitor C7. The negative electrode of the fourth capacitor C4, the negative electrode of the fifth capacitor C5, the negative electrode of the sixth capacitor C6, and the negative electrode of the seventh capacitor C7 are respectively connected to a ground wire. [0052] Referring now to FIG. 1 and FIG. 5 together, by plugging the potentiometer into the potentiometer interface J 1 , the potentiometer establishes an electrical connection with the first auxiliary circuit, and the potentiometer establishes an electrical connection with the processing chip 410, so that a user can adjust the preset duty cycle of the PWM signal output by the processing chip 410 by manipulating the potentiometer. The processing chip 400 can transmit a PWM signal of a preset duty cycle to the switching power supply circuit 100, and the switching power supply circuit 100 receives the PWM signal of the preset duty cycle and outputs a power supply signal corresponding to the preset duty cycle to the booster circuit 200 according to the PWM signal with the preset duty cycle; the booster circuit 200 receives a power supply signal, and transmits the booster power supply signal to the ion needle assembly 300 according to the received power supply signal, so that the ion needle assembly 300 controls the ionization point pair to perform ionization arc-striking according to the booster power supply signal to achieve ignition with electricity, thereby forming a flame to provide heat to the cooker to adjust the output power of the circuit, i.e., to adjust the magnitude of the flame generated by the ionization point pair.

[0053] In one embodiment, as shown in FIG. 2, the switching power supply circuit 100 includes a power supply driving circuit 110 and a power amplifier 120. An input terminal of the power supply driving circuit 110 is connected to the processing chip 410. An output terminal of the power supply driving circuit 110 is connected to an input terminal of the power amplifier 120, and an output terminal of the power amplifier 120 is connected to a booster circuit 200. [0054] The power supply driving circuit 110 can be used to drive the power amplifier 120 to be switched on and off. The power supply driving circuit 110 receives the PWM signal of a preset duty cycle transmitted by the processing chip 410, and drive the power amplifier 120 to operate according to the PWM signal with the preset duty cycle. The power amplifier 120 increases the output power of the power supply signal according to the driving of the power supply driving circuit 110.

[0055] An input terminal of the power supply driving circuit 110 is connected to the processing chip 410. An output terminal of the power supply driving circuit 110 is connected to an input terminal of the power amplifier 120. The output terminal of the power amplifier 120 is connected to the booster circuit 200. A user can adjust the preset duty cycle of the PWM signal output by the processing chip 410 by operating a potentiometer. The processing chip 410 can transmit a PWM signal with a preset duty cycle to the power supply driving circuit 110 which receives the PWM signal with the preset duty cycle, and drives the power amplifier 120 to operate according to the PWM signal with the preset duty cycle, so that the power amplifier 120 outputs a power supply signal with increased power to the booster circuit 200. The booster circuit 200 receives the power supply signal, and transmits the booster power supply signal to the ion needle assembly 300 according to the received power supply signal, so that the ion needle assembly 300 controls the ionization point pair to perform ionization arcstriking according to the booster power supply signal to achieve ignition with electricity, thereby forming a flame to provide heat to the cooker to adjust the output power of the circuit, i.e. , the user is thus able to adjust the flame generated by the ionization point pair.

[0056] In one embodiment, as shown in FIG. 3, the power supply driving circuit 110 includes a driving chip 112, a first drive transformation circuit 114 and a second drive transformation circuit 116. An input terminal of the driving chip 112 is coupled to the processing chip 410, and an output terminal of the driving chip 112 is respectively connected to the first drive transformation circuit 114 and the second drive transformation circuit 116.

[0057] The driving chip 112 can be used to drive the first drive transformation circuit 114 and the second drive transformation circuit 116 to operate, and the driving chip 112 is a power supply driving chip 112. Illustratively, the first drive transformation circuit 114 includes a first drive transformer and the second drive transformation circuit 116 includes a second drive transformer. Note that an output terminal of the first drive transformation circuit 114 and an output terminal of the second drive transformation circuit 116 are respectively connected to the power amplifier 120.

[0058] An input terminal of the driving chip 112 is coupled to the processing chip 410, and an output terminal of the driving chip 112 is respectively connected to the first drive transformation circuit 114 and the second drive transformation circuit 116, so that the processing chip 410 can transmit a PWM signal with a preset duty cycle to the driving chip 112, and the driving chip 112 receives the PWM signal with the preset duty cycle, and respectively drives the first drive transformation circuit 114 and the second drive transformation circuit 116 to operate according to the PWM signal with the preset duty cycle, so that the first drive transformation circuit 114 and the second drive transformation circuit 116 respectively drive the power amplifier 120, and thus the power amplifier 120 outputs a power supply signal with increased power to the booster circuit 200; the booster circuit 200 receives a power supply signal, and transmits the booster power supply signal to the ion needle assembly 300 according to the received power supply signal, so that the ion needle assembly 300 controls the ionization point pair to perform ionization arc-striking according to the booster power supply signal to achieve ignition with electricity, thereby forming a flame to provide heat to the cooker to adjust the output power of the circuit, i.e., the magnitude of the flame generated by the ionization point pair is adjustable.

[0059] In one embodiment, as shown in FIG. 6, the power amplifier 120 includes a first switching transistor G1 and a second switching transistor G2; a gate electrode of the first switching transistor G1 is connected to a first output terminal (i.e., a CA terminal) of the first drive transformation circuit 114, a source electrode of the first switching transistor G1 is connected to a power supply (KV+), a drain electrode of the first switching transistor G1 is respectively connected to a second output terminal (i.e., a CAB terminal) of the first drive transformation circuit 114, a source electrode of the second switching transistor G2 and a first input terminal (a TL1 terminal) of the booster circuit 200; a gate electrode of the second switching transistor G2 is connected to a first output terminal (i.e., a CB terminal) of the second drive transformation circuit 116, and a drain electrode of the second switching transistor G2 is respectively connected to a ground wire and the second input terminal (a TL2 terminal) of the booster circuit 200.

[0060] In an exemplary preferred embodiment, the first switching transistor G1 and the second switching transistor G2 are PMOS tubes respectively. Based on that, the gate electrode of the first switching transistor G1 is connected to a first output terminal (i.e., a CA terminal) of the first drive transformation circuit 114, the source electrode of the first switching transistor G1 is connected to a power supply source, the drain electrode of the first switching transistor G1 is respectively connected to a second output terminal (a CAB terminal) of the first drive transformation circuit 114, the source electrode of the second switching transistor G2 and a first input terminal (a TL1 terminal) of the booster circuit 200. A gate electrode of the second switching transistor G2 is connected to a first output terminal (i.e., a CB terminal) of the second drive transformation circuit 116, a drain electrode of the second switching transistor G2 is respectively connected to a ground wire (GND), and a second input terminal (TL2 terminal) of the booster circuit 200, and thus the processing chip 410 can transmit a PWM signal with a preset duty cycle to the driving chip 112. The driving chip 112 receives the PWM signal with the preset duty cycle, and respectively drives the first drive transformation circuit 114 and the second drive transformation circuit 116 to operate according to the PWM signal with the preset duty cycle, so that the first drive transformation circuit 114 drives the first switching transistor G1 to be switched on and off, and the first switching transistor G1 and the second drive transformation circuit 116 are controlled to be switched on and off to achieve power amplification on the input power source signal, and then the power source signal with increased power is transmitted to the booster circuit 200. The booster circuit 200 receives a power supply signal, and transmits the booster power supply signal to the ion needle assembly 300 according to the received power supply signal, so that the ion needle assembly 300 controls the ionization point pair to perform ionization arc-striking according to the booster power supply signal to achieve ignition with electricity, thereby forming a flame to provide heat to the cooker to adjust the output power of the circuit, i.e. to adjust the flame generated by the ionization point pair, thereby solving the problem that the existing electromagnetic oven cannot cook on an open flame, simplifying the circuit structure, and improving the reliability of the electric ignition circuit.

[0061] In an exemplary preferred embodiment, as shown in FIG. 6, the power amplifying branch further includes an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11 and a twelfth capacitor C12.

[0062] A positive electrode of the eighth capacitor C8 is connected to a source electrode of the first switching transistor G1 , and a negative electrode of the eighth capacitor C8 is respectively connected to a positive electrode of the ninth capacitor C9, a drain electrode of the first switching transistor G1 and a first input terminal of the booster circuit 200. The positive electrode of the ninth capacitor C9 is respectively connected to a source electrode of the second switching transistor G2 and a first input terminal of the booster circuit 200. A negative electrode of the ninth capacitor C9 is respectively connected to a drain electrode of the second switching transistor G2 and a first terminal of the twelfth capacitor C12. A positive electrode of the tenth capacitor C10 is connected to the source electrode of the first switching transistor G1 , and a negative electrode of the tenth capacitor C10 is respectively connected to a positive electrode of the eleventh capacitor C11, the drain electrode of the first switching transistor G1 and the first input terminal of the booster circuit 200. The positive electrode of the eleventh capacitor C11 is respectively connected to a source electrode of the second switching transistor G2 and a first input terminal of the booster circuit 200. A negative electrode of the eleventh capacitor C11 is respectively connected to the drain electrode of the second switching transistor G2, the first terminal of the twelfth capacitor C12, and the second terminal of the twelfth capacitor C12 is connected to the second input terminal of the booster circuit 200. The first input terminal and the second input terminal of the booster circuit are respectively connected to the ion needle assembly 300, and then charge and discharge of the eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10 and the eleventh capacitor C11 are controlled by controlling the first switching transistor G1 and the second switching transistor G2 to be switched on and off, so that power amplification is performed on the input power source signal, and then the power source signal with increased power is transmitted to the booster circuit 200. The booster circuit 200 receives a power supply signal, and transmits the booster power supply signal to the ion needle assembly 300 according to the received power supply signal, so that the ion needle assembly 300 controls the ionization point pair to perform ionization arc-striking according to the booster power supply signal to achieve ignition with electricity, thereby forming a flame to provide heat to the cooker to adjust the output power of the circuit, i.e. to adjust the flame generated by the ionization point pair, thereby solving the problem that the existing electromagnetic oven cannot cook on an open flame, simplifying the circuit structure, and improving the reliability of the electric ignition circuit.

[0063] In one embodiment, the arc-striking ion generator 320 is provided on a pot ring of an electric fire stove (see Figure 7); the pot ring of the electric fire stove is used for supporting a pot to be used, and is fitted to a pot bottom of the pot to be used. The ion needle assembly 300 further includes a support mechanism; an ion needle module 310 is provided on the support mechanism; the pot ring of the electric fire stove is provided above the support mechanism and is provided around the ion needle module 310; and an output terminal of the ion needle module 310 is located below the arc-striking ion generator 320.

[0064] The electric fire stove pot ring may be an annular pot ring. Illustratively, the electric fire stove pot ring may be a metal pot ring. The electric fire stove pot ring may be used to support a pot to be used, wherein the pot to be used may be, but is not limited to, a frying pan, a soup pan, etc. for cooking. When the pot to be used is placed on the electric fire stove pot ring, the electric fire stove pot ring is fitted to the pot bottom of the pot to be used. The arc-striking ion generator 320 is provided on the pot ring of the electric fire stove and is used to form an ionization point pair with the output terminal of the ion needle module 310, so that the electric fire arc-striking can be achieved when the ion needle module 310 operates, thereby forming a flame to provide heat to the pot to be used.

Illustratively, when the circuit is powered on for operation, the ion needle module 310 ionizes air according to a booster signal output by the booster to generate a plasma gas flow based on the arc-striking ion generator 320 being used to form an ionization point pair with an output terminal of the ion needle module 310 to achieve electric fire arc-striking.

[0065] In one embodiment, as shown in FIG. 4, the electric ignition circuit further includes a power detection circuit 500; the power detection circuit 500 includes a voltage transformer 510, a current transformer 520, a first signal processing circuit 530, and a second signal processing circuit 540.

[0066] An input terminal of the voltage transformer 510 is connected to an input terminal of the booster circuit 200, and an output terminal of the voltage transformer 510 is connected to the first signal processing circuit 530 which is connected to a processing chip 410. An input terminal of the current transformer 520 is connected to an input terminal of the booster circuit 200, the output terminal of the current transformer 520 is connected to a second signal processing circuit 540, and the second signal processing circuit 540 is connected to the processing chip 410.

[0067] A voltage transformer 510 is used to transform voltage of the wire so that the back-end circuit measures the voltage of the wire. The voltage transformer 510 can isolate the front-end high-voltage part circuit and the rear-end low- voltage part circuit to avoid the interference of a high-voltage signal to a low- voltage signal. The function of the current transformer 520 is to convert a primary current with a relatively large value into a secondary current with a relatively small value through a certain transformation ratio for protection and measurement purposes. The current transformer 520 can isolate the front-end high-voltage part circuit and the rear-end low-voltage part circuit to avoid the interference of a high-voltage signal to a low-voltage signal. In a preferred embodiment, the first signal processing circuit 530 rectifies, filters, etc. the low voltage sampling signal to reduce the noise of the low voltage sampling signal and enables the output sampling voltage conditioning signal to meet the signal amplitude requirements of the processing module. The second signal processing circuit 540 rectifies, filters, etc. the low current sampling signal, reduce the noise of the low current sampling signal, and enables the output sampling current conditioning signal to meet the signal amplitude requirements of the processing chip 410. In a preferred embodiment, the processing chip 410 processes the received sampling voltage conditioning signal and sampling current conditioning signal to obtain power information, and then accurately calculates the real-time power of the electric fire stove to achieve real-time monitoring of the output power of the electric ignition circuit.

[0068] In a preferred embodiment, an input terminal of the voltage transformer 510 is connected to an input terminal of the booster circuit 200, and the output terminal of the voltage transformer 510 is connected to the first signal processing circuit 530. The first signal processing circuit 530 is connected to the processing chip 410. An input terminal of the current transformer 520 is connected to the input terminal of the booster circuit 200, and the output terminal of the current transformer 520 is connected to a second signal processing circuit 540. The second signal processing circuit 540 is connected to the processing chip 410, and then the voltage transformer 510 receives a high voltage signal input by the booster circuit 200, and outputs a low voltage sampling signal to the first signal processing circuit 530 after performing mutual inductance isolation on the high voltage signal. The current transformer 520 receives a high current signal input by the booster circuit 200, and outputs a low current sampling signal to the second signal processing circuit 540 after performing mutual inductance isolation on the high current signal. The first signal processing circuit 530 receives a low voltage sampling signal, and outputs a sampling voltage conditioning signal to the processing chip 410 after performing signal processing on the low voltage sampling signal. The second signal processing circuit 540 receives a low current sampling signal, and outputs a sampling current conditioning signal to the processing chip 410 after performing signal processing on the low current sampling signal. The processing chip 410 receives the sampling voltage conditioning signal and the sampling current conditioning signal, and processes the sampling voltage conditioning signal and the sampling current conditioning signal to obtain power information to realize real-time power detection of the electric ignition circuit.

[0069] Some preferred embodiments of the present invention also provide an electric fire stove including the electric ignition circuit of any of the above. One such embodiment is described more fully below in connection with FIG. 7 and

FIG. 8. [0070] With regard to the specific content of the electric ignition circuit, reference can be made to the description of the electric ignition circuit in the above- mentioned embodiment, and the description thereof will not be repeated.

[0071] Specifically, an external power source is connected based on an input terminal of the switching power supply circuit. A first input terminal and a second input terminal of the booster circuit are respectively connected to the output terminal of the switching power supply. An input terminal of an ion needle module contained in the ion needle assembly is connected to a first output terminal of the booster circuit, and the output terminal of the ion needle module is close to an arc-striking ion generator. The output terminal of the ion needle module forms an ionization point pair with the arc-striking ion generator. A power control circuit is connected to a control terminal of the switching power supply circuit. When the circuit is powered on, the power control circuit can transmit a PWM signal with a preset duty cycle to the switching power supply circuit, so that the switching power supply circuit outputs a power supply signal corresponding to the preset duty cycle to the booster circuit according to the PWM signal with the preset duty cycle, and the booster circuit transmits a booster power supply signal to the ion needle assembly according to the power supply signal to control the ionization point pair to perform ionization arc-striking, thereby achieving achieve ignition with electricity. In the present application, the power control circuit controls a duty cycle of the output PWM signal to control the magnitude of the output power of the booster circuit, so that the ion needle assembly can generate an open flame with an adjustable output power and flame magnitude, and realize the functions of cooking by ignition with electricity, etc., thus solving the problem that the existing electromagnetic oven cannot cook on an open flame, simplifying the circuit structure, and improving the reliability of the electric ignition circuit.

[0072] As illustrated in FIG. 7, the electric flame circuit described above is useful as part of a cooktop, or electric flame stove 600. Stove 600 has a cooking surface 612, such as a ring, a grate, or another surface suitable for supporting cookware. In a preferred embodiment, cooking surface 612 includes the arcstriking ion generator 320 (see FIGs. 1-4). This forms an ionization point pair with ion needle modules 310, particularly the output terminal 311 of ion needle modules 310, in order to generate plasma flame 614, i.e., the electric fire described herein. A typical stove 600 includes a dial 616 through which a user adjusts the magnitude of flame 614. In preferred embodiments, dial 616 provides the potentiometer, or otherwise allows the user to manipulate the potentiometer, associated with potentiometer interface J1 (see FIG. 5).

[0073] As shown in FIG. 8, stove 600 is used with cookware 620 in the manner of a typical cooktop to heat food. By adjusting dial 616, a user manipulates the potentiometer associated with potentiometer interface J1 (see FIG. 5), thereby increasing or decreasing the magnitude of flame 614, depending on the direction in which dial 616 is turned. Accordingly, the temperature of cookware 620 increases as the magnitude of flame 614 increases, or decreases as the magnitude of flame 614 decreases. Thus, the user is able to use stove 600 in a manner similar to a gas stove, enjoying the benefits thereof without the risks and problems associated with gas stoves. [0074] Each technical feature of the above-mentioned embodiments can be combined in any combination, and in order to make the description concise, not all the possible combinations of each technical feature in the above-mentioned embodiments are described; however, as long as there is no contradiction between the combinations of these technical features, they should be considered as the scope of the description.

[0075] The embodiments described above represent only a few embodiments of the present application and are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that several variations and modifications can be made by a person skilled in the art without departing from the inventive concept, which is within the scope of the present application. Accordingly, the protection sought in the present application is as set forth in the claims below.