WO2024077762A1

WO2024077762A1 - Electricity-triggered flame circuit and electric flame cooker

Info

Publication number: WO2024077762A1
Application number: PCT/CN2022/139471
Authority: WO
Inventors: 谭刚
Original assignee: 深圳国爱全电化智慧科技有限公司
Priority date: 2022-10-13
Filing date: 2022-12-16
Publication date: 2024-04-18
Also published as: CN115388433A; CN115388433B; US20240125481A1; WO2024081821A1

Abstract

This application relates to an electricity-triggered flame circuit and an electric flame cooker. An input end of a switching power supply circuit is connected to an external power supply. An n input end of a boost circuit is connected to an output end of the switching power supply circuit. An ion needle assembly comprises an ion needle module which has an input end connected to a first output end of the boost circuit and an output end close to an arc striking ion head. The output end of the ion needle module and the arc striking ion head form an ionization point pair. A power control circuit transmits to the switching power supply circuit a PWM signal corresponding to a preset feature parameter, and the preset feature parameter comprises the frequency or the duty cycle of the PWM signal; the switching power supply circuit outputs a power supply signal to the boost circuit according to the PWM signal; the boost circuit transmits a boost power supply signal to the ion needle assembly according to the power supply signal to control the ionization point pair for ionization and arc striking, so as to produce flames from electricity. A PWM signal corresponding to preset frequency is obtained by changing the preset frequency in the power control circuit, so that the ion needle assembly produces flames with adjustable output power and heat energy. The circuit structure is simplified.

Description

Electric fire circuit and electric stove

This application claims the priority of the Chinese patent application filed with the China Patent Office on October 13, 2022, with application number 202211253380.0 and application name “Electric Fire-generating Circuit and Electric Fire Stove”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the technical field of electric stoves, and in particular to an electric fire-generating circuit and an electric stove.

Background technique

Traditional cooking stoves usually use gas stoves and induction cookers. Using gas stoves may cause safety hazards such as gas poisoning; using induction cookers may cause problems such as uneven heating. Electric stoves are a new type of stove that converts electrical energy into thermal energy through plasma technology and generates flames by ionizing air, thus achieving open flame cooking. Electric stoves get rid of the dependence on raw materials such as gas, and use electrical energy to convert flames. This has changed the traditional combustion method. Because it does not require coal gas, it solves the problem of gas explosion accidents from the root. Compared with gas stoves and induction cookers, electric stoves are safer and more convenient, and do not affect the user's cooking experience.

At present, the existing electric stoves have complex circuit structures and low circuit reliability.

Summary of the invention

Based on this, it is necessary to provide an electric fire-generating circuit and an electric fire-generating stove that improves the reliability of the electric fire-generating circuit and simplifies the circuit structure in order to solve the problems of complex circuit structure and low circuit reliability in the above-mentioned existing electric fire-generating stoves.

In order to achieve the above object, an embodiment of the present invention provides an electric fire-generating circuit, comprising:

A switching power supply circuit, wherein an input terminal of the switching power supply circuit is used to connect an external power supply;

A boost circuit, wherein a first input terminal and a second input terminal of the boost circuit are respectively connected to an output terminal of a switching power supply;

An ion needle assembly, the ion needle assembly comprises an ion needle module and an arc-starting ion head; the input end of the ion needle module is connected to the first output end of the boost circuit, the output end of the ion needle module is close to the arc-starting ion head; the output end of the ion needle module and the arc-starting ion head form an ionization point pair;

A power control circuit, the power control circuit is connected to the control end of the switching power supply circuit, the power control circuit is configured to transmit a PWM signal with preset characteristic parameters to the switching power supply circuit, the switching power supply circuit is configured to output a power signal corresponding to the preset characteristic parameters to the boost circuit, and the boost circuit transmits the boost power signal to the ion needle assembly according to the power signal to control the ionization point pair to ionize and strike the arc; the preset characteristic parameters include the frequency or duty cycle of the PWM signal.

In one embodiment, the power control circuit includes a processing chip and a power regulating switch circuit; the processing chip is connected to the power regulating switch circuit;

The power regulating switch circuit is used to adjust the preset characteristic parameters of the PWM signal so that the processing chip transmits the PWM signal corresponding to the preset characteristic parameters to the switching power supply circuit.

In one embodiment, the power regulating switch circuit includes a power regulating switch for adjusting preset characteristic parameters of the PWM signal; the power regulating switch is a potentiometer or a push button switch.

In one embodiment, the switching power supply circuit includes a power drive circuit and a power amplifier circuit;

The input end of the power driving circuit is connected to the processing chip; the output end of the power driving circuit is connected to the input end of the power amplifier circuit; and the output end of the power amplifier circuit is connected to the boost circuit.

In one embodiment, the power driving circuit includes a driving chip, a first driving voltage conversion circuit and a second driving voltage conversion circuit;

The input end of the driving chip is coupled to the processing chip, and the output end of the driving chip is connected to the first driving voltage conversion circuit and the second driving voltage conversion circuit respectively.

In one embodiment, the power amplifier circuit includes a first switch tube and a second switch tube;

The gate of the first switch tube is connected to the first output end of the first drive transformer circuit, the source of the first switch tube is connected to the power supply, and the drain of the first switch tube is respectively connected to the second output end of the first drive transformer circuit, the source of the second switch tube, and the first input end of the boost circuit; the gate of the second switch tube is connected to the first output end of the second drive transformer circuit, and the drain of the second switch tube is respectively connected to the ground wire and the second input end of the boost circuit.

In one of the embodiments, the arc-strike ion head is arranged on the pot ring of the electric fire stove; the pot ring of the electric fire stove is used to support the standby pot and fits with the bottom of the standby pot.

In one embodiment, the ion needle assembly also includes a supporting mechanism; the ion needle module is arranged on the supporting mechanism; the electric stove pot ring is arranged above the supporting mechanism and surrounds the ion needle module; the output end of the ion needle module is located below the arc-starting ion head.

In one of the embodiments, the electric ignition circuit further includes a power detection circuit; the power detection circuit includes a voltage transformer, a current transformer, a first signal conditioning circuit and a second signal conditioning circuit;

The input end of the voltage transformer is connected to the input end of the boost circuit, and the output end of the voltage transformer is connected to the first signal conditioning circuit; the first signal conditioning circuit is connected to the processing chip; the input end of the current transformer is connected to the input end of the boost circuit, and the output end of the current transformer is connected to the second signal conditioning circuit; the second signal conditioning circuit is connected to the processing chip.

On the other hand, an embodiment of the present invention further provides an electric fire stove, comprising any one of the above-mentioned electric fire-generating circuits.

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

In each embodiment of the above-mentioned electric fire-starting circuit, the electric fire-starting circuit includes a switching power supply circuit, a boost circuit, an ion needle assembly and a power control circuit, the input end of the switching power supply circuit is used to connect to an external power supply; the first input end and the second input end of the boost circuit are respectively connected to the output end of the switching power supply; the ion needle assembly includes an ion needle module and an arc-starting ion head; the input end of the ion needle module is connected to the first output end of the boost circuit, and the output end of the ion needle module is close to the arc-starting ion head; the output end of the ion needle module forms an ionization point pair with the arc-starting ion head; the power control circuit is connected to the control end of the switching power supply circuit, the power control circuit is configured to transmit a PWM signal with preset characteristic parameters to the switching power supply circuit, the preset characteristic parameters include the frequency or duty cycle of the PWM signal, the switching power supply circuit is configured to output a power signal corresponding to the preset characteristic parameters to the boost circuit, and the boost circuit transmits the boost power signal to the ion needle assembly according to the power signal to control the ionization point pair to ionize and start an arc, thereby realizing electric fire. The present application controls the preset characteristic parameters of the output PWM signal through the power control circuit, and then controls the output power of the boost circuit, so that the ion needle assembly can generate an open flame with adjustable output power and flame size, realize functions such as cooking with electric fire, solves the problem that the existing induction cooker cannot cook with open flame, simplifies the circuit structure, and improves the reliability of the electric fire circuit.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a first circuit diagram of an electric ignition circuit in one embodiment;

FIG2 is a second circuit diagram of an electric ignition circuit in one embodiment;

FIG3 is a third circuit diagram of an electric fire-generating circuit in one embodiment;

FIG4 is a fourth circuit diagram of an electric fire-generating circuit in one embodiment;

FIG5 is a circuit diagram of a power regulating switch circuit in one embodiment;

FIG. 6 is a circuit diagram of a power amplifier circuit in an embodiment.

Reference numerals:

100, switch power supply circuit; 110, power drive circuit; 112, drive chip; 114, first drive transformer circuit; 116, second drive transformer circuit; 120, power amplifier circuit; 200, boost circuit; 300, ion needle assembly; 310, ion needle module; 320, arc ion head; 400, power control circuit; 410, processing chip; 420, power regulation switch circuit; 500, power detection circuit; 510, voltage transformer; 520, current transformer; 530, first signal conditioning circuit; 540, second signal conditioning circuit; potentiometer interface J1; first capacitor C1; second capacitor C2; third capacitor C3; fourth capacitor C4; fifth capacitor C5; sixth capacitor C6; seventh capacitor C7; eighth capacitor C8; ninth capacitor C9; tenth capacitor C10; eleventh capacitor C11; twelfth capacitor C12; first resistor R1; second resistor R2; first switch tube G1; second switch tube G2.

Detailed ways

In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

In addition, the term "plurality" shall mean two or more.

In order to solve the problems of complex circuit structure and low circuit reliability in existing electric stoves, in one embodiment, as shown in Figure 1, an electric fire-making circuit is provided, including a switching power supply circuit 100, a boost circuit 200, an ion needle assembly 300 and a power control circuit 400.

The input end of the switching power supply circuit 100 is used to connect an external power supply; the first input end and the second input end of the boost circuit 200 are respectively connected to the output end of the switching power supply; the ion needle assembly 300 includes an ion needle module 310 and an arc-starting ion head 320; the input end of the ion needle module 310 is connected to the first output end of the boost circuit 200, and the output end of the ion needle module 310 is close to the arc-starting ion head 320; the output end of the ion needle module 310 forms an ionization point pair with the arc-starting ion head 320; the power control circuit 400 is connected to the control end of the switching power supply circuit 100, and the power control circuit 400 is configured to transmit a PWM signal of preset characteristic parameters to the switching power supply circuit 100, and the switching power supply circuit is configured to output a power signal corresponding to the preset characteristic parameters to the boost circuit 200, and the boost circuit 200 transmits a boost power signal to the ion needle assembly 300 to control the ionization point pair to ionize and start an arc; the preset characteristic parameters include the frequency or duty cycle of the PWM signal.

The switching power supply circuit 100 can be used to perform voltage stabilization, filtering and conversion on the power supply signal input by the external power supply, and output a stable power supply signal. The external power supply can be used to provide a 220V AC power supply to the switching power supply. The boost circuit 200 can be used to transform a low-value alternating voltage into another high-value alternating voltage of the same frequency. For example, the boost circuit 200 can include a boost transformer. In one example, the first output terminal of the booster is the same-name terminal of the booster.

The ion needle assembly 300 may include an ion needle module 310 and an arc-starting ion head 320. The output end of the ion needle module 310 is arranged close to the arc-starting ion head 320, and the arc-starting ion head 320 is used to form an ionization point pair with the output end of the ion needle module 310, so that electric arc can be achieved when the ion needle module 310 is working, thereby forming a flame to provide heat to the pot to be used. Exemplarily, when the circuit is powered on, based on the arc-starting ion head 320 being used to form an ionization point pair with the output end of the ion needle module 310, the ion needle module 310 can ionize the air according to the boost power signal output by the boost circuit 200 to generate a plasma gas flow, so as to achieve arcing during electric fire.

Exemplarily, the ion needle assembly 300 may include at least one ion needle module 310. For example, the ion needle assembly 300 includes multiple ion needle modules 310. Each ion needle module 310 can be connected in parallel at the first output end of the boost circuit 200. The output end of each ion needle module 310 is respectively arranged close to the arc-starting ion head 320, so that the arc-starting ion head 320 and the output end of each ion needle module 310 form an arc-starting loop. Then, when the circuit is electrically working, each ion needle module 310 can ionize the air according to the boost power signal output by the boost circuit 200 to generate a plasma airflow, so as to achieve arcing during electric fire, thereby forming a flame to provide heat to the cookware.

The power control circuit 400 can be used to adjust the preset characteristic parameters of the PWM signal, output the PWM signal according to the preset characteristic parameters, and then adjust the size of the circuit output power, thereby adjusting the size of the flame generated by the ionization point pair. Based on the power control circuit 400 being connected to the control end of the switching power supply circuit 100, the output end of the switching power supply circuit 100 is respectively connected to the first input end and the second input end of the boost circuit 200, and the input end of the ion needle module 310 is connected to the first output end of the boost circuit 200, so that the power control circuit 400 can transmit a PWM signal corresponding to the preset characteristic parameters to the switching power supply circuit 100, the switching power supply circuit 100 receives the PWM signal corresponding to the preset characteristic parameters, and outputs a power signal corresponding to the preset characteristic parameters to the boost circuit 200 according to the PWM signal of the preset characteristic parameters; the boost circuit 200 receives the power signal, and transmits the boost power signal to the ion needle assembly 300 according to the received power signal, so that the ion needle assembly 300 controls the ionization point pair to ionize and ignite the arc according to the boost power signal, so as to realize the electric fire, thereby forming a flame to provide heat to the cookware, and realize the size of the output power of the adjustment circuit, that is, to realize the adjustment of the size of the flame generated by the ionization point pair.

In one example, a user can manipulate the power control circuit 400 to change the preset characteristic parameters used to adjust the PWM signal, thereby outputting a corresponding PWM signal according to the preset characteristic parameters, and then adjusting the size of the circuit output power according to the PWM signal of the preset characteristic parameters, thereby adjusting the size of the flame generated by the ionization point pair.

In the above embodiment, the input end of the switching power supply circuit 100 is connected to an external power supply; the first input end and the second input end of the boost circuit 200 are respectively connected to the output end of the switching power supply; the input end of the ion needle module 310 included in the ion needle assembly 300 is connected to the first output end of the boost circuit 200, and the output end of the ion needle module 310 is close to the arc-starting ion head 320; the output end of the ion needle module 310 forms an ionization point pair with the arc-starting ion head 320; the power control circuit 400 is connected to the control end of the switching power supply circuit 100. When the circuit is powered on, the power control circuit 400 can transmit a PWM signal corresponding to the preset characteristic parameters to the switching power supply circuit 100, and the switching power supply circuit 100 can output a power signal corresponding to the preset characteristic parameters to the boost circuit 200. The boost circuit 200 transmits a boost power signal to the ion needle assembly 300 according to the power signal to control the ionization point pair to ionize and start an arc, thereby realizing electric fire. The present application changes the preset characteristic parameters of the output PWM signal through the power control circuit 400, thereby controlling the output power of the boost circuit 200, so that the ion needle assembly 300 can generate an open flame with adjustable output power and flame size, and realize functions such as cooking with electric fire, thereby solving the problem that the existing induction cooker cannot cook with open flame, simplifying the circuit structure, and improving the reliability of the electric fire circuit.

In one embodiment, as shown in Figure 2, the power control circuit 400 includes a processing chip 410 and a power regulation switch circuit 420; the processing chip 410 is connected to the power regulation switch circuit 420; the power regulation switch circuit 420 is used to adjust the preset characteristic parameters of the PWM signal so that the processing chip 410 transmits a PWM signal corresponding to the preset characteristic parameters to the switching power supply circuit 100.

The processing chip 410 may be a single chip microcomputer (MCU). The power regulating switch circuit 420 may be used to adjust the preset characteristic parameters of the PWM signal. In one example, the power regulating switch circuit 420 includes a power regulating switch for adjusting the frequency of the PWM signal; the power regulating switch is a potentiometer or a key switch. For example, if the power regulating switch is a potentiometer, the user can adjust the frequency of the PWM signal by the power regulating switch circuit 420 by manipulating the potentiometer, and the processing chip 410 outputs a corresponding PWM signal according to the adjusted frequency, thereby adjusting the size of the output power of the circuit and the size of the flame power generated by the ionization point.

For example, as shown in FIG5 , the power regulating switch circuit 420 includes a potentiometer interface J1 and a first auxiliary circuit, and the first auxiliary circuit is 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 C5, a sixth capacitor C6, a seventh capacitor C7, a first resistor R1, and a second resistor R2.

Among them, the potentiometer interface J1 is used to plug the potentiometer so that the potentiometer is electrically connected to the first auxiliary circuit. The potentiometer interface J1 includes a first pin end, a second pin end, a third pin end, a fourth pin end and a fifth pin end. Among them, the positive electrode of the first capacitor C1 is connected to the VOL pin end of the processing chip 410, and the negative electrode of the first capacitor C1 is connected to the ground wire; the positive electrode of the second capacitor C2 is connected to the VOL pin end of the processing chip 410, and the negative electrode of the second capacitor C2 is respectively connected to the ground wire, the first pin end of the potentiometer interface J1, and the second pin end of the potentiometer interface J1. The third pin end of the potentiometer interface J1 is connected to the VOL pin end of the processing chip 410. The first end of the first resistor R1 is connected to the VOL-ON/OFF pin end of the processing chip 410, and the second end of the first resistor R1 is connected to the fourth pin end of the potentiometer interface J1; the first end of the second resistor R2 is connected to the first power pin end (such as the +5V pin end) of the processing chip 410, and the second end of the second resistor R2 is respectively connected to the fourth pin end of the potentiometer interface J1 and the positive electrode of the third capacitor C3, and the negative electrode of the third capacitor C3 is connected to the ground wire. The fifth pin end of the potentiometer interface J1 is respectively connected to the second power pin end (such as the VCC-3V3 pin end) of the processing chip 410, the positive electrode of the fourth capacitor C4, the positive electrode of the fifth capacitor C5, the positive electrode of the sixth capacitor C6, and the positive electrode 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 the ground wire.

By plugging the potentiometer into the potentiometer interface J1, the potentiometer is electrically connected to the first auxiliary circuit, and the potentiometer is electrically connected to the processing chip 410. Then, the user can adjust the frequency of the PWM signal output by the power regulating switch circuit by manipulating the potentiometer, and the processing chip 410 obtains the corresponding PWM signal according to the adjusted frequency. The processing chip 410 can transmit the PWM signal to the switching power supply circuit 100, and the switching power supply circuit 100 receives the PWM signal and outputs a power signal of the frequency corresponding to the PWM signal to the boost circuit 200 according to the PWM signal; the boost circuit 200 receives the power signal and transmits the boost power signal to the ion needle assembly 300 according to the received power signal, so that the ion needle assembly 300 controls the ionization point pair to ionize and ignite the arc according to the boost power signal, so as to realize the electric fire, thereby forming a flame to provide heat to the cookware, and realize the size of the output power of the regulating circuit, that is, realize the size of the flame generated by the ionization point pair.

In one embodiment, as shown in Figure 2, the switching power supply circuit 100 includes a power driving circuit 110 and a power amplifier circuit 120; the input end of the power driving circuit 110 is connected to the processing chip 410; the output end of the power driving circuit 110 is connected to the input end of the power amplifier circuit 120; and the output end of the power amplifier circuit 120 is connected to the boost circuit 200.

The power driving circuit 110 can be used to drive the power amplifier circuit 120 to turn on and off. The power driving circuit 110 can receive a PWM signal corresponding to a preset characteristic parameter transmitted by the processing chip 410, and drive the power amplifier circuit 120 to work according to the PWM signal corresponding to the preset characteristic parameter. The power amplifier circuit 120 can increase the output power of the power signal according to the driving of the power driving circuit 110.

Based on the input end of the power drive circuit 110 connected to the processing chip 410; the output end of the power drive circuit 110 is connected to the input end of the power amplifier circuit 120; the output end of the power amplifier circuit 120 is connected to the boost circuit 200; in one example, the user can adjust the frequency of the PWM signal output by the power adjustment switch circuit by manipulating the potentiometer, and the processing chip 410 obtains the corresponding PWM signal according to the adjusted frequency. The processing chip 410 can transmit a PWM signal corresponding to the preset characteristic parameter to the power drive circuit 110, and the power drive circuit 110 receives the PWM signal and drives the power amplifier circuit 120 to work according to the PWM signal, so that the power amplifier circuit 120 outputs a power signal with increased power to the boost circuit 200; the boost circuit 200 receives the power signal and transmits the boost power signal to the ion needle assembly 300 according to the received power signal, so that the ion needle assembly 300 controls the ionization point pair to ionize and ignite the arc according to the boost power signal, so as to realize the electric fire, thereby forming a flame to provide heat to the pot, and realize the size of the output power of the adjustment circuit, that is, to realize the size of the flame generated by the ionization point pair.

In one embodiment, as shown in FIG. 3 , the power driving circuit 110 includes a driving chip 112, a first driving transformer circuit 114 and a second driving transformer circuit 116; the input end of the driving chip 112 is coupled to the processing chip 410, and the output end of the driving chip 112 is respectively connected to the first driving transformer circuit 114 and the second driving transformer circuit 116.

The driver chip 112 can be used to drive the first driver transformer circuit 114 and the second driver transformer circuit 116 to work, and the driver chip 112 is a power driver chip 112. Exemplarily, the first driver transformer circuit 114 includes a first driver transformer, and the second driver transformer circuit 116 includes a second driver transformer. It should be noted that the output end of the first driver transformer circuit 114 and the output end of the second driver transformer circuit 116 are respectively connected to the power amplifier circuit 120.

Based on the input end of the driving chip 112 coupled to the processing chip 410, the output end of the driving chip 112 is respectively connected to the first driving transformer circuit 114 and the second driving transformer circuit 116, so that the processing chip 410 can transmit a PWM signal corresponding to the preset characteristic parameters to the driving chip 112, and the driving chip 112 receives the PWM signal, and according to the PWM signal, drives the first driving transformer circuit 114 and the second driving transformer circuit 116 to work respectively, so that the first driving transformer circuit 114 and the second driving transformer circuit 116 respectively drive the power amplifier circuit 120, so that the power amplifier circuit 120 outputs a power signal with increased power to the boost circuit 200; the boost circuit 200 receives the power signal, and according to the received power signal, transmits the boost power signal to the ion needle assembly 300, so that the ion needle assembly 300 controls the ionization point pair to ionize and ignite the arc according to the boost power signal, so as to realize the fire with electricity, thereby forming a flame to provide heat to the cookware, and realize the size of the output power of the adjustment circuit, that is, to realize the adjustment of the size of the flame generated by the ionization point pair.

In one embodiment, as shown in FIG6 , the power amplifier circuit 120 includes a first switch tube G1 and a second switch tube G2; the gate of the first switch tube G1 is connected to the first output terminal (i.e., the CA terminal) of the first driving transformer circuit 114, the source of the first switch tube G1 is connected to the power supply (KV+), and the drain of the first switch tube G1 is respectively connected to the second output terminal (i.e., the CAB terminal) of the first driving transformer circuit 114, the source of the second switch tube G2, and the first input terminal (TL1 terminal) of the boost circuit 200; the gate of the second switch tube G2 is connected to the first output terminal (i.e., the CB terminal) of the second driving transformer circuit 116, and the drain of the second switch tube G2 is respectively connected to the ground wire and the second input terminal (TL2 terminal) of the boost circuit 200.

Wherein, the first switch tube G1 and the second switch tube G2 can be PMOS tubes respectively. Based on the gate of the first switch tube G1 being connected to the first output terminal (i.e., CA terminal) of the first driving transformer circuit 114, the source of the first switch tube G1 being connected to the power supply, the drain of the first switch tube G1 being respectively connected to the second output terminal (CAB terminal) of the first driving transformer circuit 114, the source of the second switch tube G2, and the first input terminal (TL1 terminal) of the boost circuit 200; the gate of the second switch tube G2 being connected to the first output terminal (i.e., CB terminal) of the second driving transformer circuit 116, the drain of the second switch tube G2 being respectively connected to the ground wire (GND) and the second input terminal (TL2 terminal) of the boost circuit 200, the processing chip 410 can transmit a PWM signal to the driving chip 112, the driving chip 112 receives the PWM signal, and according to the PWM signal, drives the first driving transformer circuit 114 and the second driving transformer circuit 116 to work respectively, The first driving transformer circuit 114 drives the first switch tube G1 to be turned on and off, and the second driving transformer circuit 116 drives the second switch tube G2 to be turned on and off. By controlling the on and off of the first switch tube G1 and the second switch tube G2, the input power signal is amplified, and the power signal with amplified power is transmitted to the boost circuit 200; the boost circuit 200 receives the power signal, and transmits the boost power signal to the ion needle assembly 300 according to the received power signal, so that the ion needle assembly 300 controls the ionization point pair to ionize and ignite the arc according to the boost power signal, so as to generate fire with electricity, thereby forming a flame to provide heat to the cookware, and the output power of the adjustment circuit is adjusted, that is, the size of the flame generated by the ionization point pair is adjusted, which solves the problem that the existing induction cooker cannot cook with open flames, simplifies the circuit structure, and improves the reliability of the electric fire circuit.

Exemplarily, as shown in FIG6 , the power amplification branch further includes an eighth capacitor C8 , a ninth capacitor C9 , a tenth capacitor C10 , an eleventh capacitor C11 and a twelfth capacitor C12 .

Among them, the positive electrode of the eighth capacitor C8 is connected to the source of the first switch tube G1, and the negative electrode of the eighth capacitor C8 is respectively connected to the positive electrode of the ninth capacitor C9, the drain of the first switch tube G1, and the first input end of the boost circuit 200; the positive electrode of the ninth capacitor C9 is respectively connected to the source of the second switch tube G2 and the first input end of the boost circuit 200; the negative electrode of the ninth capacitor C9 is respectively connected to the drain of the second switch tube G2 and the first end of the twelfth capacitor C12; the positive electrode of the tenth capacitor C10 is connected to the source of the first switch tube G1, and the negative electrode of the tenth capacitor C10 is respectively connected to the positive electrode of the eleventh capacitor C11, the drain of the first switch tube G1, and the first input end of the boost circuit 200; the positive electrode of the eleventh capacitor C11 is respectively connected to the source of the second switch tube G2 and the first input end of the boost circuit 200; the negative electrode of the eleventh capacitor C11 is respectively connected to the drain of the second switch tube G2 and the first end of the twelfth capacitor C12, and the second end of the twelfth capacitor C12 is connected to the second input end of the boost circuit 200. The first input terminal and the second input terminal of the boost circuit are respectively connected to the ion needle assembly 300, and then the eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10 and the eleventh capacitor C11 are controlled to be charged and discharged by controlling the on-off of the first switch tube G1 and the second switch tube G2, so as to realize power amplification of the input power signal, and then transmit the power signal with amplified power to the boost circuit 200; the boost circuit 200 receives the power signal, and transmits the boost power signal to the ion needle assembly 300 according to the received power signal, so that the ion needle assembly 300 controls the ionization point pair to ionize and ignite the arc according to the boost power signal, realizes electric fire, and thus forms a flame to provide heat to the cookware, realizes the size of the output power of the adjustment circuit, that is, realizes the adjustment of the size of the flame generated by the ionization point pair, solves the problem that the existing induction cooker cannot cook with open flames, simplifies the circuit structure, and improves the reliability of the electric fire circuit.

In one embodiment, the arc-starting ion head 320 is arranged on the pot ring of the electric fire stove; the pot ring of the electric fire stove is used to support the standby pot and fits with the bottom of the standby pot. The ion needle assembly 300 also includes a support mechanism; the ion needle module 310 is arranged on the support mechanism; the pot ring of the electric fire stove is arranged above the support mechanism and surrounds the ion needle module 310; the output end of the ion needle module 310 is located below the arc-starting ion head 320.

Among them, the electric stove pot ring can be a ring pot ring. Exemplarily, the electric stove pot ring can be a pot ring made of metal material. The electric stove pot ring can be used to support the standby pot, wherein the standby pot can be but not limited to a frying pan, a soup pot and other pots used for cooking. When the standby pot is placed on the electric stove pot ring, the electric stove pot ring fits with the bottom of the standby pot. The arc-starting ion head 320 is arranged on the electric stove pot ring, and the arc-starting ion head 320 is used to form an ionization point pair with the output end of the ion needle module 310, and then when the ion needle module 310 is working, electric fire arcing can be realized, thereby forming a flame to provide heat to the standby pot. Exemplarily, when the circuit is powered on, based on the arc-starting ion head 320 being used to form an ionization point pair with the output end of the ion needle module 310, the ion needle module 310 can ionize the air according to the boost signal output by the booster to generate a plasma airflow, so as to realize arcing during electric fire.

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 conditioning circuit 530 and a second signal conditioning circuit 540 .

The input end of the voltage transformer 510 is connected to the input end of the boost circuit 200, and the output end of the voltage transformer 510 is connected to the first signal conditioning circuit 530; the first signal conditioning circuit 530 is connected to the processing chip 410; the input end of the current transformer 520 is connected to the input end of the boost circuit 200, and the output end of the current transformer 520 is connected to the second signal conditioning circuit 540; the second signal conditioning circuit 540 is connected to the processing chip 410.

Among them, the voltage transformer 510 is used to transform the line voltage so that the back-end circuit can measure the voltage of the line. The voltage transformer 510 can isolate the front-end high-voltage part circuit and the back-end low-voltage part circuit to avoid the interference of the high-voltage signal on the low-voltage signal. The function of the current transformer 520 is to convert the primary current with a larger value into a secondary current with a smaller value through a certain transformation ratio, which is used for protection, measurement and other purposes. The current transformer 520 can isolate the front-end high-voltage part circuit and the back-end low-voltage part circuit to avoid the interference of the high-voltage signal on the low-voltage signal. The first signal conditioning circuit 530 can be used to perform signal conditioning such as rectification and filtering on the low-voltage sampling signal, reduce the noise of the low-voltage sampling signal, and enable the output sampling voltage conditioning signal to meet the signal amplitude requirements of the processing module. The second signal conditioning circuit 540 can be used to perform signal conditioning such as rectification and filtering on the low-current sampling signal, reduce the noise of the low-current sampling signal, and enable the output sampling current conditioning signal to meet the signal amplitude requirements of the processing chip 410. The processing chip 410 can be used to process the received sampled voltage conditioning signal and the sampled current conditioning signal to obtain power information, and then accurately calculate the real-time power of the electric stove, thereby realizing real-time monitoring of the output power of the electric ignition circuit.

Based on the input end of the voltage transformer 510 being connected to the input end of the boost circuit 200, the output end of the voltage transformer 510 being connected to the first signal conditioning circuit 530; the first signal conditioning circuit 530 being connected to the processing chip 410; the input end of the current transformer 520 being connected to the input end of the boost circuit 200, the output end of the current transformer 520 being connected to the second signal conditioning circuit 540; the second signal conditioning circuit 540 being connected to the processing chip 410, and then the voltage transformer 510 receiving the high voltage signal input from the boost circuit 200, and after performing mutual inductance isolation on the high voltage signal, outputting the low voltage sampling signal to the first signal conditioning circuit 530; the current transformer 520 receiving the input from the boost circuit 200 The first signal conditioning circuit 530 receives the low voltage sampling signal, performs signal conditioning on the low voltage sampling signal, and then outputs the sampling voltage conditioning signal to the processing chip 410; the second signal conditioning circuit 540 receives the low current sampling signal, performs signal conditioning on the low current sampling signal, and then outputs the sampling current conditioning signal to the processing chip 410; 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, thereby realizing real-time power detection of the electric ignition circuit.

In one embodiment, the present invention further provides an electric fire stove, comprising any one of the above-mentioned electric fire-making circuits.

For the specific content of the electric ignition circuit, please refer to the description of the electric ignition circuit in the above embodiment, which will not be repeated here.

Specifically, the input end of the switching power supply circuit is connected to an external power supply; the first input end and the second input end of the boost circuit are respectively connected to the output end of the switching power supply; the ion needle assembly includes an ion needle module and an arc-starting ion head; the input end of the ion needle module is connected to the first output end of the boost circuit, and the output end of the ion needle module is close to the arc-starting ion head; the output end of the ion needle module and the arc-starting ion head form an ionization point pair; the power control circuit is connected to the control end of the switching power supply circuit, and the power control circuit is configured to adjust the preset characteristic parameters of the PWM signal, and the preset characteristic parameters include the frequency or duty cycle of the PWM signal. The power control circuit transmits a PWM signal corresponding to the preset characteristic parameters to the switching power supply circuit, so that the switching power supply circuit outputs a power signal corresponding to the PWM signal frequency to the boost circuit according to the PWM signal, and the boost circuit transmits the boost power signal to the ion needle assembly according to the power signal to control the ionization point pair to ionize and start an arc, thereby realizing electric fire. The present application controls the preset characteristic parameters of the output PWM signal through a power control circuit, thereby controlling the output power of the boost circuit, so that the ion needle assembly can generate an open flame with adjustable output power and flame size, realizing functions such as cooking with electric fire, solving the problem that the existing induction cooker cannot cook with open flame, simplifying the circuit structure, and improving the reliability of the electric fire circuit.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

An electric fire-generating circuit, characterized by comprising:

A switching power supply circuit, wherein an input end of the switching power supply circuit is used to connect to an external power supply;

A boost circuit, wherein a first input terminal and a second input terminal of the boost circuit are respectively connected to an output terminal of the switching power supply;

An ion needle assembly, the ion needle assembly comprising an ion needle module and an arc-starting ion head; the input end of the ion needle module is connected to the first output end of the boost circuit, the output end of the ion needle module is close to the arc-starting ion head; the output end of the ion needle module and the arc-starting ion head form an ionization point pair;

A power control circuit, wherein the power control circuit is connected to the control end of the switching power supply circuit, the power control circuit is configured to transmit a PWM signal of preset characteristic parameters to the switching power supply circuit, the switching power supply circuit is configured to output a power signal corresponding to the preset characteristic parameters to the boost circuit, and the boost circuit transmits a boost power signal to the ion needle assembly according to the power signal to control the ionization point pair to ionize and strike an arc; the preset characteristic parameters include the frequency or duty cycle of the PWM signal.
The electric ignition circuit according to claim 1 is characterized in that the power control circuit comprises a processing chip and a power regulating switch circuit; the processing chip is connected to the power regulating switch circuit;

The power regulating switch circuit is used to adjust the preset characteristic parameters of the PWM signal so that the processing chip transmits the PWM signal corresponding to the characteristic parameters to the switching power supply circuit.
The electric ignition circuit according to claim 2 is characterized in that the power regulating switch circuit includes a power regulating switch for adjusting preset characteristic parameters of the PWM signal.
The electric fire-making circuit according to claim 2, characterized in that the switching power supply circuit comprises a power drive circuit and a power amplifier circuit;

The input end of the power driving circuit is connected to the processing chip; the output end of the power driving circuit is connected to the input end of the power amplifier circuit; and the output end of the power amplifier circuit is connected to the boost circuit.
The electric ignition circuit according to claim 4 is characterized in that the power drive circuit comprises a drive chip, a first drive transformer circuit and a second drive transformer circuit;

The input end of the driving chip is coupled to the processing chip, and the output end of the driving chip is connected to the first driving voltage transformation circuit and the second driving voltage transformation circuit respectively.
The electric ignition circuit according to claim 5, characterized in that the power amplifier circuit comprises a first switch tube and a second switch tube;

The gate of the first switch tube is connected to the first output end of the first drive transformer circuit, the source of the first switch tube is connected to the power supply, and the drain of the first switch tube is respectively connected to the second output end of the first drive transformer circuit, the source of the second switch tube, and the first input end of the boost circuit; the gate of the second switch tube is connected to the first output end of the second drive transformer circuit, and the drain of the second switch tube is respectively connected to the ground wire and the second input end of the boost circuit.
The electric fire-starting circuit according to claim 1 is characterized in that the arc-starting ion head is arranged on the pot ring of the electric fire stove; the pot ring of the electric fire stove is used to support the standby pot and fits with the bottom of the standby pot.
The electric fire-starting circuit according to claim 2 is characterized in that the ion needle assembly also includes a supporting mechanism; the ion needle module is arranged on the supporting mechanism; the electric fire stove pot ring is arranged above the supporting mechanism and surrounds the ion needle module; the output end of the ion needle module is located below the arc-starting ion head.
The electric fire-making circuit according to claim 2 is characterized in that it also includes a power detection circuit; the power detection circuit includes a voltage transformer, a current transformer, a first signal conditioning circuit and a second signal conditioning circuit;

The input end of the voltage transformer is connected to the input end of the boost circuit, and the output end of the voltage transformer is connected to the first signal conditioning circuit; the first signal conditioning circuit is connected to the processing chip; the input end of the current transformer is connected to the input end of the boost circuit, and the output end of the current transformer is connected to the second signal conditioning circuit; the second signal conditioning circuit is connected to the processing chip.
An electric fire stove, characterized by comprising the electric fire-making circuit according to any one of claims 1 to 9.