Flame adjusting device of plasma flame stove

Abstract

The utility model discloses a plasma flame stove flame adjusting device which comprises a PWM drive circuit, a voltage transformation circuit, a plasma drive circuit and a key control circuit, and the PWM drive circuit is used for generating PWM drive signals; the voltage transformation circuit comprises a transformer T1, the transformer T1 comprises a first coil T1A and a second coil T1B, and the first coil T1A is used for carrying out voltage transformation modulation on the input direct current under the action of the PWM driving circuit; the plasma driving circuit comprises one or more pairs of positive and negative electrodes, and the positive and negative electrodes are used for generating plasma flames under the action of high voltage output by the second coil T1B in a voltage transformation manner; and the key control circuit comprises one or more keys so as to carry out power regulation and control on the plasma driving circuit through the PWM driving circuit, so that the power of the plasma driving circuit can be regulated and controlled, the whole circuit is simple, the production cost is low, the regulation effect is good, and the application requirements of the market can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of flame stove circuits, in particular to a flame regulating device for a plasma flame stove. Background Art

[0002] An electric cooktop is a kitchen cooker that is heated by electricity. Its working principle is based on the heat generated by plasma. Plasma is a hot gas consisting of ionized gas molecules and free electrons. In a plasma flame electric cooktop, a strong electric field or radio frequency power source is used to ionize a gas (usually argon, nitrogen, or a mixture of argon and nitrogen) to produce plasma. The high temperature of the plasma enables it to be used as a flame source. The plasma flame in this electric cooktop can reach very high temperatures, so it can heat food quickly.

[0003] The electric flame stove in the prior art mainly controls the power of the plasma flame by adjusting the input direct current. This control method generally includes front-end voltage transformation control, converting the alternating current into voltage-controllable direct current, and then transforming the output at the next stage to generate an electric flame. This circuit structure is complex, the production cost is high, the regulation effect is poor, and it is difficult to meet application requirements. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a plasma flame stove flame adjustment device.

[0005] To achieve the above-mentioned purpose, the utility model provides a plasma flame stove flame adjustment device, comprising:

[0006] A PWM drive circuit, wherein the PWM drive circuit is used to generate a PWM drive signal;

[0007] A voltage conversion circuit, the voltage conversion circuit is connected to the input DC output terminal, the voltage conversion circuit includes a transformer T1, the transformer T1 includes a first coil T1A and a second coil T1B, the first coil T1A is used for the PWM drive circuit to perform voltage conversion modulation on the input DC under the action of the PWM drive circuit;

[0008] A plasma driving circuit, the plasma driving circuit is connected to the second coil T1B of the transformer circuit, the plasma driving circuit comprises one or more pairs of positive and negative electrodes, the positive and negative electrodes are used to generate a plasma flame under the action of the transformer output high voltage of the second coil T1B;

[0009] A key control circuit, wherein the key control circuit includes one or more keys, and the keys are connected to the PWM drive circuit to perform power regulation control on the plasma drive circuit through the PWM drive circuit.

[0010] Furthermore, according to an embodiment of the present utility model, the voltage transformation circuit further includes:

[0011] A MOS transistor Q1, wherein the gate of the MOS transistor Q1 is connected to the first PWM signal output terminal of the PWM drive circuit, and the drain of the MOS transistor Q1 is connected to the input DC output terminal;

[0012] A MOS transistor Q2, wherein a gate of the MOS transistor Q2 is connected to a second PWM signal output terminal of the PWM drive circuit, a drain of the MOS transistor Q2 is connected to a source of the MOS transistor Q1, and a source of the MOS transistor Q2 is connected to a reference ground;

[0013] an inductor L1, one end of the inductor L1 being connected to the drain of the MOS transistor Q2, and the other end of the inductor L1 being connected to one end of the first coil T1A;

[0014] Capacitor C1, one end of the capacitor C1 is connected to the other end of the first coil T1A, and the other end of the capacitor C1 is connected to a reference ground.

[0015] Furthermore, according to an embodiment of the utility model, the plasma flame stove flame adjustment device also includes:

[0016] a current sampling circuit, the current sampling circuit being connected to the plasma driving circuit to detect the current of the plasma driving circuit and feeding back the sampled current to the PWM driving circuit;

[0017] A voltage sampling circuit is connected to the plasma driving circuit to detect the voltage of the plasma driving circuit and feed back the sampled voltage to the PWM driving circuit.

[0018] Further, according to an embodiment of the present utility model, the current sampling circuit includes:

[0019] A current detection resistor R4, wherein the current detection resistor R4 is connected in series to a driving loop of the plasma driving circuit;

[0020] A diode D3, wherein the anode of the diode D3 is connected to the current detection output end of the current detection resistor R4;

[0021] A resistor R11, one end of the resistor R11 is connected to the cathode of the diode D3;

[0022] a resistor R12, one end of the resistor R12 being connected to the other end of the resistor R11, and the other end of the resistor R12 being connected to a reference ground;

[0023] A capacitor C3, one end of the capacitor C3 is connected to the one end of the resistor R12, and the other end of the capacitor C3 is connected to a reference ground;

[0024] A voltage stabilizing diode D5, wherein a cathode of the voltage stabilizing diode D5 is connected to the one end of the resistor R12, and an anode of the voltage stabilizing diode D5 is connected to a reference ground.

[0025] Further, according to an embodiment of the present utility model, the voltage sampling circuit includes:

[0026] A diode D4, wherein an anode of the diode D4 is connected to the positive electrode ends of the positive and negative electrodes, and the negative electrode ends of the positive and negative electrodes are connected to a reference ground;

[0027] a resistor R13, one end of the resistor R13 being connected to the cathode of the diode D4;

[0028] a resistor R14, one end of the resistor R14 being connected to the other end of the resistor R13, and the other end of the resistor R14 being connected to a reference ground;

[0029] A capacitor C4, one end of the capacitor C4 is connected to the one end of the resistor R14, and the other end of the capacitor C4 is connected to a reference ground;

[0030] A voltage stabilizing diode D6, wherein a cathode of the voltage stabilizing diode D6 is connected to the one end of the resistor R14, and an anode of the voltage stabilizing diode D6 is connected to a reference ground.

[0031] Furthermore, according to an embodiment of the utility model, the plasma flame stove flame adjustment device also includes:

[0032] A signal isolation controller, wherein the first side of the signal isolation controller is respectively connected to the sampling signal output ends of the current sampling circuit and the voltage sampling circuit, and the second side of the signal isolation controller is respectively connected to the PWM drive circuit to isolate and output the current sampling signal and / or the voltage sampling signal to the PWM drive circuit.

[0033] Furthermore, according to an embodiment of the utility model, the plasma flame stove flame adjustment device also includes:

[0034] A state display circuit, the state display circuit is connected to the PWM drive circuit, and the state display circuit is also used to display the working state under the control of the PWM drive circuit;

[0035] Wherein, the working state includes: any one or more of the working current of the plasma driving circuit, the working voltage of the plasma driving circuit, and the working power of the plasma driving circuit.

[0036] Furthermore, according to an embodiment of the present invention, it also includes:

[0037] A first power supply circuit, wherein the transformer T1 includes a third coil T1C, and the first power supply circuit is connected to the third coil T1C to rectify, filter and stabilize the transformed output voltage of the third coil T1C, and then output a first direct current to power the PWM drive circuit and the signal isolation controller;

[0038] The second power supply circuit, the transformer T1 includes a fourth coil T1D, and the second power supply circuit is connected to the fourth coil T1D to rectify, filter and stabilize the transformed output voltage of the fourth coil T1D, and then output a second direct current to power the signal isolation controller.

[0039] Further, according to an embodiment of the present utility model, the first power supply circuit includes:

[0040] a diode D1, wherein an anode of the diode D1 is connected to one end of the third coil T1C, and the other end of the third coil T1C is connected to a reference ground;

[0041] A capacitor EC2, one end of the capacitor EC2 is connected to the cathode of the diode D1, and the other end of the capacitor EC2 is connected to a reference ground;

[0042] A three-terminal voltage regulator U4, wherein an input terminal of the three-terminal voltage regulator U4 is connected to a cathode of the diode D1;

[0043] A resistor R8, one end of the resistor R8 is connected to the regulating end of the three-terminal regulator U4, and the other end of the resistor R8 is connected to the reference ground;

[0044] A resistor R7, one end of the resistor R7 is connected to the regulating end of the three-terminal regulator U4, and the other end of the resistor R7 is connected to the output end of the three-terminal regulator U4.

[0045] Furthermore, according to an embodiment of the utility model, the plasma flame stove flame adjustment device also includes:

[0046] An AC / DC conversion circuit is connected to the transformer circuit to convert input AC power into the input DC power.

[0047] The flame regulating device of the plasma flame stove provided by the embodiment of the utility model is used to generate a PWM driving signal through a PWM driving circuit; the voltage conversion circuit is connected to the input direct current output end, the voltage conversion circuit includes a transformer T1, the transformer T1 includes a first coil T1A and a second coil T1B, the first coil T1A is used in the PWM driving circuit to transform and modulate the input direct current under the action of the PWM driving circuit; the plasma driving circuit is connected to the second coil T1B of the voltage conversion circuit, the plasma driving circuit includes a pair or more pairs of positive and negative electrodes, the positive and negative electrodes are used to generate plasma flame under the action of the voltage conversion output high voltage of the second coil T1B; the key control circuit includes one or more keys, the keys are connected to the PWM driving circuit, so as to adjust the power of the plasma driving circuit through the PWM driving circuit, so that the PWM driving circuit can be directly controlled by the keys, and the power of the plasma driving circuit can be adjusted and controlled by the PWM driving circuit, the overall circuit is simple, the production cost is low, the adjustment effect is good, and the application requirements of the market can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a circuit structure block diagram of a flame adjustment device for a plasma flame stove provided in an embodiment of the utility model.

[0049] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] In order to make the technical personnel in the technical field better understand the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described in combination with the drawings in the embodiment of the present invention. Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as those commonly understood by the technical personnel in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] See also Figure 1The utility model provides a flame adjustment device for a plasma flame stove, comprising: a PWM drive circuit, a voltage conversion circuit, a plasma drive circuit and a key control circuit, wherein the PWM drive circuit is used to generate a PWM drive signal; Figure 1 As shown in , the PWM drive circuit may include a PWM drive controller and a first PWM driver and a second PWM driver, wherein the first PWM driver and the second PWM driver are respectively connected to the PWM signal output terminal of the PWM drive controller to convert the PWM signal output by the PWM drive controller into a drive signal of a switch tube to drive and control the voltage conversion circuit.

[0053] The voltage conversion circuit is connected to the input DC output terminal, and the voltage conversion circuit includes a transformer T1, and the transformer T1 includes a first coil T1A and a second coil T1B. The first coil T1A is used for the PWM drive circuit to perform voltage conversion modulation on the input DC under the action of the PWM drive circuit; Figure 1 As shown in , the voltage conversion circuit can transform and modulate the direct current HV at the first coil T1A under the action of the PWM driving signal, and output the transformed and modulated high-voltage radio frequency electricity through the second coil T1B.

[0054] The plasma driving circuit is connected to the second coil T1B of the transformer circuit, and the plasma driving circuit includes one or more pairs of positive and negative electrodes, and the positive and negative electrodes are used to generate plasma flames under the action of the transformer output high voltage electricity of the second coil T1B; the high voltage radio frequency electricity output by the second coil T1B acts on the positive and negative electrodes, so that the gas at the positive and negative electrodes (for example, argon, nitrogen, or a mixture of argon and nitrogen, etc.) can be ionized, thereby generating a plasma flame.

[0055] The button control circuit includes one or more buttons, and the button is connected to the PWM drive circuit to adjust the power of the plasma drive circuit through the PWM drive circuit. In order to adjust and control the plasma flame. The button control circuit can send a flame adjustment control instruction to the PWM drive circuit. In this way, the PWM drive circuit can adjust and control the PWM drive signal according to the flame adjustment control instruction. Thereby, the voltage value of the high voltage electricity output by the transformer of the second coil T1B can be adjusted, and then the output power of the plasma drive circuit can be adjusted to achieve the adjustment and control of the plasma flame. The PWM drive circuit can be directly controlled by the button, and the power of the plasma drive circuit can be adjusted and controlled by the PWM drive circuit. The overall circuit is simple, the production cost is low, and the adjustment effect is good, which can meet the application requirements of the market.

[0056] In one embodiment of the utility model, the voltage conversion circuit further includes: a MOS transistor Q1, a MOS transistor Q2, an inductor L1 and a capacitor C1, wherein the gate of the MOS transistor Q1 is connected to the first PWM signal output terminal of the PWM drive circuit, and the drain of the MOS transistor Q1 is connected to the input DC output terminal; the gate of the MOS transistor Q2 is connected to the second PWM signal output terminal of the PWM drive circuit, the drain of the MOS transistor Q2 is connected to the source of the MOS transistor Q1, and the source of the MOS transistor Q2 is connected to a reference ground; one end of the inductor L1 is connected to the drain of the MOS transistor Q2, and the other end of the inductor L1 is connected to one end of the first coil T1A; one end of the capacitor C1 is connected to the other end of the first coil T1A, and the other end of the capacitor C1 is connected to the reference ground.

[0057] like Figure 1As shown in , the transformer circuit mainly modulates and transforms the input DC point under the action of the PWM control signal of the PWM drive circuit, and its working process is that when the PWM drive controller outputs a first PWM signal through the first PWM control terminal, the first PWM signal can be amplified by the first PWM driver to drive the MOS transistor Q1 to be turned on or off. Similarly, when the PWM drive controller outputs a second PWM signal through the second PWM control terminal, the second PWM signal can be amplified by the second PWM driver to drive the MOS transistor Q2 to be turned on or off. In order to avoid short circuit of MOS transistor Q1 and MOS transistor Q2, the MOS transistor Q1 and MOS transistor Q2 are turned on and off alternately. When MOS transistor Q1 is turned on and MOS transistor Q2 is turned off, the DC power HV charges the inductor L1, the first coil T1A and the capacitor C1 through the MOS transistor Q1. In this process, the current of the first coil T1A gradually increases. When both MOS transistor Q1 and MOS transistor Q2 are turned off, the inductor L1 and the first coil T1A can be discharged through the body diode D-Q2 of MOS transistor Q2, and the process can continue to charge the capacitor C1. The process can clamp the voltage across the drain and source of MOS transistor Q2 in a low voltage range, which can make the MOS transistor Q2 softly turned on. When MOS transistor Q1 is turned off and MOS transistor Q2 is turned on, the capacitor C1 can be discharged through the first coil T1A, the inductor L1 and the MOS transistor Q2. When both MOS transistor Q1 and MOS transistor Q2 are turned off again, the inductor L1 and the first coil T1A can continue to discharge through the body diode of MOS transistor Q1. At this time, the voltage across the drain and source of MOS transistor Q1 can be clamped in a low voltage range, which can make the MOS transistor Q1 softly turned on. When MOS transistor Q1 is turned on again and MOS transistor Q2 is turned off, the direct current HV can charge the inductor L1, the first coil T1A and the capacitor C1 through MOS transistor Q1 again. In this way, the first coil T1A is controlled to repeatedly charge and discharge, so that the second coil T1B generates a mutual inductance power supply. The high-voltage radio frequency power output by the second coil T1B acts on the positive and negative electrodes, so that the gas at the positive and negative electrodes can be ionized, thereby generating a continuous plasma flame. In this process, the PWM drive circuit can adjust the output of the PWM signal according to the key control circuit, perform adjustment and control within the set time, and then adjust the output power of the plasma drive circuit to achieve the adjustment and control of the plasma flame.

[0058] See also Figure 1, the flame adjustment device for the plasma flame stove further includes: a current sampling circuit and a voltage sampling circuit, the current sampling circuit is connected to the plasma driving circuit to detect the current of the plasma driving circuit and feed back the sampled current to the PWM driving circuit; the voltage sampling circuit is connected to the plasma driving circuit to detect the voltage of the plasma driving circuit and feed back the sampled voltage to the PWM driving circuit. The PWM driving circuit can obtain the actual power of the plasma driving circuit through the current sampling circuit and the voltage sampling circuit. As shown in Figure 1, the flame adjustment device for the plasma flame stove further includes: a state display circuit, the state display circuit is connected to the PWM driving circuit, and the state display circuit is also used to display the working state under the control of the PWM driving circuit; wherein the working state includes: any one or more of the working current of the plasma driving circuit, the working voltage of the plasma driving circuit, and the working power of the plasma driving circuit. In this way, the user can adjust and control the plasma flame according to the displayed power size, so as to facilitate more accurate adjustment and control. Of course, it should be noted that in other embodiments, the user can also adjust and control the plasma flame according to the state of the visual flame.

[0059] like Figure 1 As shown in, in one embodiment of the utility model, the current sampling circuit includes: a current detection resistor R4, a diode D3, a resistor R11, a resistor R12, a capacitor C3 and a voltage-stabilizing diode D5, the current detection resistor R4 is connected in series on the driving loop of the plasma driving circuit; the anode of the diode D3 is connected to the current detection output end of the current detection resistor R4; one end of the resistor R11 is connected to the cathode of the diode D3; one end of the resistor R12 is connected to the other end of the resistor R11, and the other end of the resistor R12 is connected to the reference ground; one end of the capacitor C3 is connected to the one end of the resistor R12, and the other end of the capacitor C3 is connected to the reference ground; the cathode of the voltage-stabilizing diode D5 is connected to the one end of the resistor R12, and the anode of the voltage-stabilizing diode D5 is connected to the reference ground.

[0060] Specifically, the working process of the current sampling circuit is that the current of the plasma driving circuit can be detected by the current detection resistor R4, and the detected current value is converted into a corresponding voltage value and output to the diode D3, and then output to the resistors R11 and R12 after rectification by the diode D3, and then output after voltage division by the resistors R11 and R12. The voltage regulator diode D5 is used to limit the maximum output voltage to protect the back-end circuit, and the capacitor C3 is used to filter the interference signal, so that the current of the plasma driving circuit can be sampled and output.

[0061] like Figure 1 As shown in, in one embodiment of the utility model, the voltage sampling circuit includes: a diode D4, a resistor R13, a resistor R14, a capacitor C4 and a voltage-stabilizing diode D6, the anode of the diode D4 is connected to the positive electrode end of the positive and negative electrodes, and the negative electrode end of the positive and negative electrodes is connected to the reference ground; one end of the resistor R13 is connected to the cathode of the diode D4; one end of the resistor R14 is connected to the other end of the resistor R13, and the other end of the resistor R14 is connected to the reference ground; one end of the capacitor C4 is connected to the one end of the resistor R14, and the other end of the capacitor C4 is connected to the reference ground; the cathode of the voltage-stabilizing diode D6 is connected to the one end of the resistor R14, and the anode of the voltage-stabilizing diode D6 is connected to the reference ground.

[0062] Specifically, the working process of the voltage sampling circuit is that the voltage of the plasma driving circuit can be detected through the positive electrode end, and the detected voltage value is output to the diode D4, which is rectified by the diode D4 and output to the resistors R13 and R14, and then divided by the resistors R13 and R14 and output. The voltage stabilizing diode D6 is used to limit the maximum output voltage to protect the back-end circuit, and the capacitor C4 is used to filter the interference signal, so that the voltage of the plasma driving circuit can be sampled and output.

[0063] See also Figure 1 , the plasma flame stove flame adjustment device also includes: a signal isolation controller, the first side of the signal isolation controller is respectively connected to the sampling signal output ends of the current sampling circuit and the voltage sampling circuit, and the second side of the signal isolation controller is respectively connected to the PWM drive circuit to isolate and output the current sampling signal and / or the voltage sampling signal to the PWM drive circuit. The signal isolation controller can be used to isolate the signals at both ends of the first coil T1A and the second coil T1B of the transformer T1 to a certain extent, so as to better protect the PWM drive circuit. Of course, in other embodiments, the sampling signals of the current sampling circuit and the voltage sampling circuit can also be directly output to the PWM drive circuit. However, in this case, when the back-end circuit of the plasma drive circuit fails, it is easy to affect the front-end circuit of the PWM drive circuit. Therefore, in this embodiment, a signal isolator is also used to isolate the signal to improve the reliability of the circuit.

[0064] See also Figure 1The plasma flame stove flame adjustment device also includes: a first power supply circuit and a second power supply circuit, the transformer T1 includes a third coil T1C, the first power supply circuit is connected to the third coil T1C, so as to rectify, filter and stabilize the transformed output voltage of the third coil T1C, and then output a first direct current to power the PWM drive circuit and the signal isolation controller; the transformer T1 includes a fourth coil T1D, and the second power supply circuit is connected to the fourth coil T1D, so as to rectify, filter and stabilize the transformed output voltage of the fourth coil T1D, and then output a second direct current to power the signal isolation controller.

[0065] The first power supply circuit can be used to power the front-end circuits such as the PWM drive circuit and the signal isolation controller. The second power supply circuit can be used to power the back-end circuit and the signal isolation controller. This enables the primary and secondary circuits of the transformer T1 to be powered separately, ensuring the stability of the circuit.

[0066] like Figure 1 As shown in, the first power supply circuit includes: a diode D1, a capacitor EC2, a three-terminal regulator U4, a resistor R8 and a resistor R7, the anode of the diode D1 is connected to one end of the third coil T1C, and the other end of the third coil T1C is connected to the reference ground; one end of the capacitor EC2 is connected to the cathode of the diode D1, and the other end of the capacitor EC2 is connected to the reference ground; the input end of the three-terminal regulator U4 is connected to the cathode of the diode D1; one end of the resistor R8 is connected to the adjustment end of the three-terminal regulator U4, and the other end of the resistor R8 is connected to the reference ground; one end of the resistor R7 is connected to the adjustment end of the three-terminal regulator U4, and the other end of the resistor R7 is connected to the output end of the three-terminal regulator U4.

[0067] Specifically, the working process of the first power supply circuit is that the third coil T1C transformer output power supply can be rectified and output to the capacitor EC2 through the diode D1, and the capacitor EC2 is used for voltage stabilization output. Since the output voltage of the third coil T1C may not be a stable voltage value after voltage stabilization, the voltage may fluctuate to a certain extent, and the three-terminal voltage regulator U4 can further stabilize the output, thereby outputting a stable voltage value VDD. The voltage value VDD can be input to the adjustment terminal of the three-terminal voltage regulator U4 after voltage division by resistors R8 and R7 for regulated output.

[0068] The second power supply circuit includes: a diode D2, a capacitor EC3, a three-terminal regulator U5, a resistor R10 and a resistor R9, wherein the anode of the diode D2 is connected to one end of the fourth coil T1D, and the other end of the fourth coil T1D is connected to the second reference ground; one end of the capacitor EC3 is connected to the cathode of the diode D2, and the other end of the capacitor EC3 is connected to the second reference ground; the input end of the three-terminal regulator U5 is connected to the cathode of the diode D2; one end of the resistor R10 is connected to the adjustment end of the three-terminal regulator U5, and the other end of the resistor R10 is connected to the second reference ground; one end of the resistor R9 is connected to the adjustment end of the three-terminal regulator U5, and the other end of the resistor R9 is connected to the output end of the three-terminal regulator U5. The circuit structure of the second power supply circuit is basically the same as that of the first power supply circuit, and will not be repeated here.

[0069] See also Figure 1 The plasma flame stove flame adjustment device further comprises: an AC-DC conversion circuit, which is connected to the transformer circuit to convert the input AC power into the input DC power. Figure 1 As shown in , the AC-DC conversion circuit may include an AC input anti-interference circuit, a rectifier circuit and a voltage stabilizing capacitor EC1. The AC input anti-interference circuit can filter the interference signal of the AC power of the mains, and the rectifier circuit rectifies the AC power into half-wave DC power, and stabilizes the DC power HV through the voltage stabilizing capacitor EC1.

[0070] The above are only embodiments of the utility model, but they do not limit the patent scope of the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above specific implementations, or replace some of the technical features therein with equivalents. Any equivalent structure made by using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the utility model patent.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A flame regulating device for a plasma flame stove, characterized in that: include: A PWM drive circuit, wherein the PWM drive circuit is used to generate a PWM drive signal; A voltage conversion circuit, the voltage conversion circuit is connected to the input DC output terminal, the voltage conversion circuit includes a transformer T1, the transformer T1 includes a first coil T1A and a second coil T1B, the first coil T1A is used for the PWM drive circuit to perform voltage conversion modulation on the input DC under the action of the PWM drive circuit; A plasma driving circuit, the plasma driving circuit is connected to the second coil T1B of the transformer circuit, the plasma driving circuit comprises one or more pairs of positive and negative electrodes, the positive and negative electrodes are used to generate a plasma flame under the action of the transformer output high voltage of the second coil T1B; A key control circuit, wherein the key control circuit includes one or more keys, and the keys are connected to the PWM drive circuit to perform power regulation control on the plasma drive circuit through the PWM drive circuit.

2. The flame regulating device for a plasma flame stove according to claim 1, characterized in that: The voltage conversion circuit also includes: A MOS transistor Q1, wherein the gate of the MOS transistor Q1 is connected to the first PWM signal output terminal of the PWM drive circuit, and the drain of the MOS transistor Q1 is connected to the input DC output terminal; A MOS transistor Q2, wherein a gate of the MOS transistor Q2 is connected to a second PWM signal output terminal of the PWM drive circuit, a drain of the MOS transistor Q2 is connected to a source of the MOS transistor Q1, and a source of the MOS transistor Q2 is connected to a reference ground; an inductor L1, one end of the inductor L1 being connected to the drain of the MOS transistor Q2, and the other end of the inductor L1 being connected to one end of the first coil T1A; Capacitor C1, one end of the capacitor C1 is connected to the other end of the first coil T1A, and the other end of the capacitor C1 is connected to a reference ground.

3. The flame regulating device for a plasma flame stove according to claim 1, characterized in that: Also includes: a current sampling circuit, the current sampling circuit being connected to the plasma driving circuit to detect the current of the plasma driving circuit and feeding back the sampled current to the PWM driving circuit; A voltage sampling circuit is connected to the plasma driving circuit to detect the voltage of the plasma driving circuit and feed back the sampled voltage to the PWM driving circuit.

4. The flame regulating device for a plasma flame range according to claim 3, characterized in that: The current sampling circuit comprises: A current detection resistor R4, wherein the current detection resistor R4 is connected in series to a driving loop of the plasma driving circuit; A diode D3, wherein the anode of the diode D3 is connected to the current detection output end of the current detection resistor R4; A resistor R11, one end of the resistor R11 is connected to the cathode of the diode D3; a resistor R12, one end of the resistor R12 being connected to the other end of the resistor R11, and the other end of the resistor R12 being connected to a reference ground; A capacitor C3, one end of the capacitor C3 is connected to the one end of the resistor R12, and the other end of the capacitor C3 is connected to a reference ground; A voltage stabilizing diode D5, wherein a cathode of the voltage stabilizing diode D5 is connected to the one end of the resistor R12, and an anode of the voltage stabilizing diode D5 is connected to a reference ground.

5. The flame regulating device for a plasma flame range according to claim 3, characterized in that: The voltage sampling circuit comprises: A diode D4, wherein an anode of the diode D4 is connected to the positive electrode ends of the positive and negative electrodes, and the negative electrode ends of the positive and negative electrodes are connected to a reference ground; A resistor R13, one end of the resistor R13 is connected to the cathode of the diode D4; a resistor R14, one end of the resistor R14 is connected to the other end of the resistor R13, and the other end of the resistor R14 is connected to a reference ground; A capacitor C4, one end of the capacitor C4 is connected to the one end of the resistor R14, and the other end of the capacitor C4 is connected to a reference ground; A voltage stabilizing diode D6, wherein a cathode of the voltage stabilizing diode D6 is connected to the one end of the resistor R14, and an anode of the voltage stabilizing diode D6 is connected to a reference ground.

6. The flame regulating device for a plasma flame range according to any one of claims 3 to 5, characterized in that: Also includes: A signal isolation controller, wherein the first side of the signal isolation controller is respectively connected to the sampling signal output ends of the current sampling circuit and the voltage sampling circuit, and the second side of the signal isolation controller is respectively connected to the PWM drive circuit to isolate and output the current sampling signal and / or the voltage sampling signal to the PWM drive circuit.

7. The flame regulating device for a plasma flame range according to claim 6, characterized in that: Also includes: A state display circuit, the state display circuit is connected to the PWM drive circuit, and the state display circuit is also used to display the working state under the control of the PWM drive circuit; Wherein, the working state includes: any one or more of the working current of the plasma driving circuit, the working voltage of the plasma driving circuit, and the working power of the plasma driving circuit.

8. The flame regulating device for a plasma flame range according to claim 6, characterized in that: Also includes: A first power supply circuit, wherein the transformer T1 includes a third coil T1C, and the first power supply circuit is connected to the third coil T1C to rectify, filter and stabilize the transformed output voltage of the third coil T1C, and then output a first direct current to power the PWM drive circuit and the signal isolation controller; The second power supply circuit, the transformer T1 includes a fourth coil T1D, and the second power supply circuit is connected to the fourth coil T1D to rectify, filter and stabilize the transformed output voltage of the fourth coil T1D, and then output a second direct current to power the signal isolation controller.

9. The flame regulating device for a plasma flame range according to claim 8, characterized in that: The first power supply circuit comprises: a diode D1, wherein an anode of the diode D1 is connected to one end of the third coil T1C, and the other end of the third coil T1C is connected to a reference ground; A capacitor EC2, one end of the capacitor EC2 is connected to the cathode of the diode D1, and the other end of the capacitor EC2 is connected to a reference ground; A three-terminal voltage regulator U4, wherein an input terminal of the three-terminal voltage regulator U4 is connected to a cathode of the diode D1; A resistor R8, one end of the resistor R8 is connected to the regulating end of the three-terminal regulator U4, and the other end of the resistor R8 is connected to the reference ground; A resistor R7, one end of the resistor R7 is connected to the regulating end of the three-terminal regulator U4, and the other end of the resistor R7 is connected to the output end of the three-terminal regulator U4.

10. The flame regulating device for a plasma flame range according to claim 1, characterized in that: Also includes: An AC / DC conversion circuit is connected to the transformer circuit to convert input AC power into the input DC power.

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