Protection circuit for electric flame stove

Abstract

The utility model discloses a protection circuit for an electric flame stove, which is connected between a boosting transformer and a plasma cooking range, enables the plasma cooking range to excite air to form plasmas and further form flames, and comprises a first input point, a second input point, a first output point, a second output point, a protection module and a voltage doubling rectifier module, the first output point and the second output point form an ultrahigh potential difference to excite air, the protection module is connected with the voltage-multiplying rectification module, the input end of the voltage-multiplying rectification module is connected with the first input point and the second input point, and the output end of the voltage-multiplying rectification module is connected with the first output point and the second output point. The voltage doubling rectifying module comprises a plurality of silicon stacks and a plurality of high-voltage capacitors, and the plurality of silicon stacks and the plurality of high-voltage capacitors are matched with multiple to boost voltage. According to the circuit, the silicon stacks replace series diodes, the high-voltage capacitors replace series capacitors, and the silicon stacks and the high-voltage capacitors are small in size, good in voltage resistance, safe and stable.

Description

Technical Field

[0001] This utility model relates to the field of high voltage generating circuit technology for electric flame stoves, and in particular to a protection circuit for electric flame stoves. Background Technology

[0002] An electric flame stove is a new type of kitchen appliance that requires no fuel. It uses a high-frequency electric field to excite air molecules to generate high-temperature plasma for heating, and features high temperature, high efficiency, energy saving, and environmental protection.

[0003] For example, Chinese patent application publication number CN118816242A discloses a dual-burner electric stove and a multi-burner electric stove that can form a plasma flame.

[0004] Electric flame stoves require the breakdown of air to generate a high-temperature plasma flame. Therefore, the voltage needs to be increased to over 10,000 volts to the plasma needle at the stove head to break down the air. Thus, a voltage boosting protection circuit is needed between the plasma needle and the step-up transformer to prevent short circuits and meet the safety standards for electric flame stoves. Chinese patent application CN118659306A discloses a voltage boosting protection circuit and an electric flame stove. The aforementioned voltage boosting protection circuit uses multiple diodes and capacitors arranged in series. In actual production, diodes and capacitors generally have voltage withstand values; exceeding these values ​​will damage the components. Therefore, a large number of diodes and capacitors need to be connected in series, which increases the circuit's size. If one diode or capacitor fails, the entire series branch will be damaged. Furthermore, the large number of diodes and capacitors significantly increases the heat generated by the circuit, requiring additional heat dissipation structures and components. This increases the size and weight of the electric flame stove. For example, Chinese patent application CN118816242A requires the addition of heat sinks, fans, and heat dissipation structures. Utility Model Content

[0005] The purpose of this invention is to provide a protection circuit for an electric flame stove. The circuit uses a silicon stack instead of a series diode and a high-voltage capacitor instead of a series capacitor. The silicon stack and the high-voltage capacitor are small in size, have good voltage resistance, are safe and stable, and the circuit generates less heat, which can reduce the number of heat dissipation components and enable the electric flame stove to be integrated into the design.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a protection circuit for an electric flame stove, connected between a step-up transformer and a plasma cooker head, enabling the plasma cooker head to excite air to form plasma and then flame, including a first input point, a second input point, a first output point, a second output point, a protection module, and a voltage multiplier rectifier module. The first output point and the second output point form an ultra-high potential difference to excite air. The protection module is connected to the voltage multiplier rectifier module. The input terminal of the voltage multiplier rectifier module is connected to the first input point and the second input point. The output terminal of the voltage multiplier rectifier module is connected to the first output point and the second output point. The voltage multiplier rectifier module includes multiple silicon stacks and multiple high-voltage capacitors, which work together to increase the voltage by a factor of two.

[0007] By adopting the above technical solution, the protection circuit for the electric flame stove uses a voltage multiplier rectifier module composed of silicon stack and high voltage capacitor to boost the output to a high voltage. The silicon stack and high voltage capacitor are small in size and have good voltage resistance, which maintains the stable operation and service life of the circuit.

[0008] A further feature of this invention is that the first input point and the second input point are respectively connected to the secondary side of the step-up transformer to form a circuit.

[0009] The first input point and the second input point can be connected to the secondary side of the same step-up transformer at the same time, or they can be connected to the secondary side of different step-up transformers respectively, as long as the first input point and the second input point of the protection circuit can form a loop.

[0010] A further feature of this invention is that the second input point is connected to the grounding point, and the first output point is connected to the plasma stove head.

[0011] A further configuration of this invention is as follows: the voltage doubler rectifier module includes a first silicon stack, a second silicon stack, a third high-voltage capacitor, a fourth high-voltage capacitor, and a fifth high-voltage capacitor. One end of the fourth high-voltage capacitor is connected to a second input point, and the other end of the fourth high-voltage capacitor is connected to the positive terminal of the second silicon stack. The negative terminal of the second silicon stack is connected to one end of the third high-voltage capacitor, and the other end of the third high-voltage capacitor is connected to the first input point. One end of the third high-voltage capacitor is connected to the positive terminal of the first silicon stack, the negative terminal of the first silicon stack is connected to a first output point, and the positive terminal of the second silicon stack is connected to a second output point.

[0012] A further feature of this invention is that the voltage doubler rectifier module also includes several silicon stacks and an equal number of high-voltage capacitors, with the silicon stacks and high-voltage capacitors connected in series within the voltage doubler rectifier module.

[0013] A further feature of this invention is that multiple voltage multiplier rectifier modules are provided, and each voltage multiplier rectifier module is connected in parallel to output one path to the plasma cooker head.

[0014] A further feature of this invention is that the number of voltage doubler rectifier modules is 18.

[0015] A further feature of this invention is that the protection module includes a first resistor, a seventh high-voltage capacitor, and an eighth high-voltage capacitor, which are connected in series and then connected to a grounding point.

[0016] A further feature of this invention is that the voltage doubler rectifier module is connected in parallel with a first high-voltage capacitor and a second high-voltage capacitor.

[0017] A further feature of this invention is that the step-up transformer is an AC transformer.

[0018] Compared with the prior art, this utility model has the following advantages: 1. The protection circuit uses a silicon stack instead of a series diode and a high-voltage capacitor instead of a series capacitor. The silicon stack and the high-voltage capacitor are small in size and have good voltage resistance, avoiding the disadvantages of the existing series capacitor and diode series connection, which are large in size and will damage all the series branches if one is damaged; 2. The protection circuit uses a voltage doubler rectifier module to rectify and boost the voltage to a high voltage. The loop current is small, which reduces the heat generation of the components and makes the circuit less hot. This can reduce the number of heat dissipation components and make the electric flame stove more integrated into the design. Attached Figure Description

[0019] Figure 1 This is a circuit diagram of the protection circuit of the electric flame stove in the embodiment.

[0020] Figure 2 This is a schematic diagram of the voltage boosting module of the voltage doubler rectifier module in the embodiment.

[0021] Figure 3 This is a circuit diagram of the protection circuit of the electric flame stove in another embodiment.

[0022] Figure 4 This is a schematic diagram of the stacked silicon stack and high-voltage capacitor of the voltage doubler rectifier module in another embodiment.

[0023] Figure 5 This is a schematic diagram of the plasma burner head of the electric flame stove in the embodiment.

[0024] Figure 6 This is a circuit diagram of the protection circuit in another embodiment.

[0025] In the diagram: 1. Protection module; 2. Voltage multiplier rectifier module; 3. Plasma burner head; 4. Plasma needle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. It should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] This utility model discloses a protection circuit for an electric flame stove, which is connected between a step-up transformer and a plasma burner head 3. The plasma needle 4 inside the plasma burner head 3 generates a high-voltage current to excite air to form plasma and then a flame. As shown in Figure 1, the protection circuit includes an output terminal, a first output point P1, a second output point P2, a first input point P3, a second input point P4, a protection module 1, and a voltage multiplier rectifier module 2. An ultra-high potential difference is formed between the first output point P1 and the second output point P2 to excite air. Input points P3 and P4 are connected to the secondary side of the step-up transformer. The protection module 1 is connected to the voltage multiplier rectifier module 2. The input terminal of the voltage multiplier rectifier module 2 is connected to the input points P3 and P4, and the output terminal is connected to the first output point P1 and the second output point P2 for multiplying the voltage output.

[0028] like Figure 1 As shown, the voltage doubler rectifier module 2 includes a first silicon stack D1, a second silicon stack D2, a third high-voltage capacitor C3, a fourth high-voltage capacitor C4, and a fifth high-voltage capacitor C5. One end of the fourth high-voltage capacitor C4 is connected to the second input point P4, and the other end of the fourth high-voltage capacitor C4 is connected to the positive terminal of the second silicon stack D2. The negative terminal of the second silicon stack D2 is connected to one end of the third high-voltage capacitor C3, and the other end of the third high-voltage capacitor C3 is connected to the first input point P3. One end of the third high-voltage capacitor C3 is connected to the positive terminal of the first silicon stack D1, and the negative terminal of the first silicon stack D1 is connected to the first output point P1. At the same time, the positive terminal of the second silicon stack D2 is connected to the second output point P2.

[0029] like Figure 2As shown, the principle of the voltage doubler rectifier module 2 is as follows: When the second input point P4 is positive and the first input point P3 is negative, the current flow direction is counterclockwise as indicated by the inner side of the figure. The current flows through the second silicon stack D2 to charge the third high-voltage capacitor C3, and the voltage at the third high-voltage capacitor C3 is superimposed. When the voltage is reversed, the second input point P4 is negative and the first input point P3 is positive, and the current flow direction is clockwise as indicated by the outer side of the figure. The current flows through the first silicon stack D1 to charge the fifth high-voltage capacitor C5. The charge of the third high-voltage capacitor C3 is added to the fifth high-voltage capacitor C5, and the voltage is superimposed again. In this way, a high DC voltage is superimposed to generate an output voltage and excite the air.

[0030] In this embodiment, the step-up transformer is an AC transformer. The alternating current output by the AC transformer can reverse the polarity to allow the voltage multiplier rectifier module 2 to output a superimposed voltage. Of course, in other embodiments, a DC transformer can also be used, in which case the direction of the current should be controlled.

[0031] The first and second input points can be connected to the secondary side of the same step-up transformer simultaneously, or they can be connected to the secondary side of different step-up transformers respectively, as long as the first and second input points of the protection circuit can form a loop.

[0032] If the first output point P1 is the positive output point, then the second output point P2 is the negative output point. Thus, a potential difference is formed between the first output point P1 and the second output point P2. The second output point P2 can be connected to a potential no higher than that of the first output point P1 to maintain this potential difference. Figure 3 As shown, in this embodiment, the optimal potential is selected as zero potential, so the second output point P2 is connected to the ground point.

[0033] like Figure 4 As shown, in some embodiments, to achieve a higher voltage, a silicon stack and a high-voltage capacitor can be connected in series after the fifth high-voltage capacitor C5, and so on, adding silicon stack DN and high-voltage capacitor CN in series for superposition output.

[0034] like Figure 1 As shown, in this embodiment, the protection module 1 includes a first resistor R1, a seventh high-voltage capacitor C7, and an eighth high-voltage capacitor C8. The first resistor R1, the seventh high-voltage capacitor C7, and the eighth high-voltage capacitor C8 are connected in series. The first resistor is connected to one end of the secondary side of the step-up transformer, and the eighth high-voltage capacitor C8 is connected to the grounding point.

[0035] like Figure 1 As shown, in this embodiment, a first high-voltage capacitor C1 and a second high-voltage capacitor C2 are connected in parallel between the first input point P3 and the second input point P4. The first high-voltage capacitor C1 and the second high-voltage capacitor C2 make the voltage boosting process more stable.

[0036] like Figure 5As shown, in one embodiment, the electric flame stove is equipped with multiple plasma burners 3, each plasma burner 3 containing a plasma needle 4. The plasma needle 4 is connected to a first output point P1, and the output DC high voltage excites air to form a plasma flame; here, as... Figure 6 As shown, the protection circuit in this embodiment is equipped with multiple voltage doubler rectifier modules 2, which are connected in parallel for output.

[0037] In one embodiment, the electric flame stove has eighteen plasma burners 3, and in this embodiment, the protection circuit has eighteen voltage multiplier rectifier modules 2 connected in parallel.

[0038] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A protection circuit for an electric flame, connected between a step-up transformer and a plasma burner (3) for igniting air to form a plasma and in turn a flame, characterized in that: The application relates to a high-voltage power supply device, which comprises a first input point, a second input point, a first output point, a second output point, a protection module (1) and a voltage doubling rectifier module (2), the first output point and the second output point form a super high potential difference to excite air, the protection module (1) is connected with the voltage doubling rectifier module (2), the input end of the voltage doubling rectifier module (2) is connected with the first input point and the second input point, the output end of the voltage doubling rectifier module (2) is connected with the first output point and the second output point, the voltage doubling rectifier module (2) comprises a plurality of silicon stacks and a plurality of high-voltage capacitors, and the plurality of silicon stacks and high-voltage capacitors are matched to increase voltage.

2. A protection circuit for an electric flame, according to claim 1, characterized in that: The first input point and the second input point are respectively connected on the secondary side of a step-up transformer to form a loop.

3. A protection circuit for an electric flame, according to claim 2, characterized in that: The second input point is connected with a grounding point, and the first output point is connected with a plasma burner (3).

4. A protection circuit for an electric flame, according to claim 1, characterized in that: The voltage doubling rectifier module (2) comprises a first silicon stack, a second silicon stack, a third high-voltage capacitor, a fourth high-voltage capacitor and a fifth high-voltage capacitor, one end of the fourth high-voltage capacitor is connected with the second input point, the other end of the fourth high-voltage capacitor is connected with the positive electrode of the second silicon stack, the negative electrode of the second silicon stack is connected with one end of the third high-voltage capacitor, the other end of the third high-voltage capacitor is connected with the first input point, one end of the third high-voltage capacitor is connected with the positive electrode of the first silicon stack, the negative electrode of the first silicon stack is connected with the first output point, and the positive electrode of the second silicon stack is connected with the second output point.

5. A protection circuit for an electric flame, according to claim 4, characterized in that: The voltage doubling rectifier module (2) further comprises a plurality of silicon stacks and an equal number of high-voltage capacitors, and the plurality of silicon stacks and high-voltage capacitors are connected in series in the voltage doubling rectifier module (2).

6. A protection circuit for an electric flame, according to claim 5, characterized in that: The voltage doubling rectifier module (2) is provided with a plurality of voltage doubling rectifier modules (2), each of the voltage doubling rectifier modules (2) is connected in parallel and outputs one path to connect the plasma burner (3).

7. A protection circuit for an electric flame, according to claim 6, characterized in that: The number of the voltage doubling rectifier modules (2) is 18.

8. A protective circuit for an electric flame, according to claim 1, characterized in that: The protection module (1) comprises a first resistor, a seventh high-voltage capacitor and an eighth high-voltage capacitor, and the first resistor, the seventh high-voltage capacitor and the eighth high-voltage capacitor are connected in series in sequence and connected with the grounding point.

9. A protective circuit for an electric flame, according to claim 1, characterized in that: The voltage doubling rectifier module (2) is connected in parallel with a first high-voltage capacitor and a second high-voltage capacitor.

10. A protection circuit for an electric flame, according to claim 1, characterized in that: The step-up transformer is an alternating current transformer.

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