Arc striking type furnace end and electric flame stove

Abstract

The invention discloses an arc striking type furnace end and an electric flame stove. The arc striking type furnace end comprises a first cathode plate, a ceramic ring, a second cathode plate, a circuit board and a plurality of plasma combustion devices, each plasma combustion device is composed of a cathode tube, an insulating part and an anode needle which are coaxially arranged. The space distance between the anode needle and the cathode tube is prolonged, the plasma arc stroke is increased, the electron collision opportunity and frequency are increased, the electron avalanche effect is easily formed, energy is larger, the heating efficiency is improved, and electric energy is saved; the arc striking needle shortens the initial arc striking distance, the problem that direct arc striking is difficult due to the fact that the distance between the anode needle and the cathode tube is lengthened is solved, and the starting success rate of the electric flame stove is increased. All parts of the plasma combustion device achieve self-positioning through the structures of the parts, the screws are only used for final overall fastening, the overall parts of the furnace end are stabilized by means of bidirectional clamping pressure between the first negative plate and the circuit board, the furnace end is easy to assemble, and the labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to an electric flame stove. BACKGROUND

[0002] The electric flame stove is also called plasma stove, which is a new type of flame generation method. The electric field changes at high frequency, and the two electrodes generate arc phenomenon under a certain voltage. The arc is a high-temperature ionized gas, and the electric flame stove uses the continuous arc as the energy for heating the pot.

[0003] As the application number is 202311369153.9, a furnace head of rotating working medium jet flow is disclosed, which comprises a cathode plate, a plurality of hollow cathode jet pipes arranged on the cathode plate, a plurality of insulating seats, and a plurality of anode needles arranged on the insulating seats. The bottom of the insulating seat is provided with a plurality of air inlet holes, and the air inlet holes are inclined and used to generate rotating air flow in the arc generation space.

[0004] However, in order to achieve effective arc striking, the distance between the anode needle and the cathode jet pipe is usually set to 2-3mm. Although this structure can make the electric flame stove start normally, the volume of the electric field generated is small, the plasma electric arc generated between the two electrodes has a short stroke, and the generated electrons are also relatively insufficient, which causes low efficiency. At the same time, after the working gas of the furnace head enters the insulating seat, a rotating air flow is formed, which quickly leaves the discharge area through a strong electric field. The gas is not fully ionized, so the efficiency of the ionized gas molecules is relatively low, which causes the electric flame stove to waste electric energy.

[0005] At the same time, the anode needle of the invention is fixed in the connecting groove by threads. The electric flame stove usually has dozens or hundreds of plasma burners. The plurality of plasma burners are fixed by threads, which not only requires special tools for installation during production and maintenance, causing complicated disassembly and assembly processes, but also may be loose during user use or transportation in high-temperature and high-vibration working environment, affecting the normal use of the electric flame stove.

[0006] In view of the above technical problems in the field of electric flame stove, it is the task of the researchers in the field to develop an electric flame stove with reasonable structure and high assembly efficiency, and the goal pursued by the researchers in the field is to improve the working efficiency of the electric flame stove and reduce the power consumption. SUMMARY

[0007] The present application is to overcome the above-mentioned problems, and aims to provide a technical solution to solve the above-mentioned problems.

[0008] A furnace head of arc striking type comprises a first cathode plate, a ceramic ring, a second cathode plate, a circuit board, and a plurality of plasma combustion devices. The single plasma combustion device is composed of a cathode tube, an insulating part and an anode needle arranged coaxially; The insulating part is a cylindrical structure with a nearly closed bottom, a downward extending lower insulating tube is arranged at the center of the bottom of the insulating part, an anode channel in the lower insulating tube penetrates the bottom of the insulating part, an upward extending upper insulating tube is arranged at the edge of the bottom of the insulating part, an arc leading channel in the upper insulating tube penetrates the bottom of the insulating part; The upper end surface of the second cathode plate is provided with a plurality of arc leading needles corresponding to the plasma combustion device, the arc leading needles extend upward through the arc leading channel; The circuit board is provided with a plurality of needle holes corresponding to the anode needles, the bottom of the anode needle is arranged in the needle hole, and the upper end of the anode needle extends upward through the anode channel; Preferably, the second cathode plate is electrically connected to the power supply ground through an electromagnetic switch; Preferably, the first cathode plate is provided with a plurality of upper mounting holes corresponding to the cathode tube, the cathode tube is provided with a mounting ring outside the bottom, the outer diameter of the mounting ring is greater than the inner diameter of the upper mounting hole, and the top surface of the insulating part abuts against the bottom surface of the cathode tube; Preferably, the second cathode plate is provided with a plurality of lower mounting holes corresponding to the lower insulating tube, the arc leading needle is arranged at the edge of the mounting hole of the second cathode plate, the lower insulating tube extends downward through the lower mounting hole, and the bottom of the insulating part abuts against the second cathode plate at the edge of the lower mounting hole; Preferably, the inner intermediate section of the ceramic ring is provided with a limiting part, the upper end surface of the limiting part abuts against the second cathode plate, and the top surface of the ceramic ring abuts against the first cathode plate; Preferably, the lower end of the anode needle is provided with a limiting ring, the outer diameter of the limiting ring is greater than the inner diameter of the lower insulating tube, and the limiting ring is arranged between the bottom of the insulating tube and the edge of the needle hole of the circuit board; Preferably, the first cathode plate is provided with a bolt column, the bolt column abuts against the upper end surface of the circuit board, and the first cathode plate is stably fixed to the circuit board through a screw; Preferably, a furnace end cavity is formed between the upper ends of the first cathode plate, the second cathode plate and the ceramic ring, an air inlet fan is arranged at the lower end surface of the second cathode plate, the air inlet fan communicates with the furnace end cavity, and an air inlet hole is arranged on the side wall of the insulating part, the air inlet hole communicates the inside of the plasma combustion device with the furnace end cavity; Preferably, copper foils are arranged on the inner wall of the needle hole and the edge of the needle hole of the circuit board, and the anode end of the circuit board is electrically connected through the copper foils; An electric flame stove comprises the arc striking stove head of any one of the above, and further comprises a panel and a stove box, the stove box is provided with a plurality of supporting columns at the bottom, and the supporting columns abut against the lower end surface of the circuit board.

[0009] Compared with the prior art, the advantages of the present application are: The spatial distance between the anode needle and the cathode tube is prolonged, the plasma arc stroke is increased, the electron collision opportunity and frequency are increased, the electron avalanche effect is easily formed, the energy is greater, and therefore the heating efficiency is improved and the electric energy is saved; the arc striking needle shortens the initial arc striking distance, solves the problem that the direct arc striking between the anode needle and the cathode tube is difficult due to the lengthening of the distance, and improves the starting success rate of the electric flame stove.

[0010] The components of the plasma combustion device are self-positioned through the structure thereof, the dependence on tool fixtures is reduced, screws are only used for final overall fastening, the stable fixation of the overall components of the stove head is realized through the bidirectional clamping pressure between the first cathode plate and the circuit board, the stove head assembly is simple, and the labor cost is reduced.

[0011] Additional aspects and advantages of the present application will be made partially clear in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor under the premise of the drawings.

[0013] Figure 1 is a structural schematic diagram of the electric flame stove of the present application.

[0014] Figure 2 is Figure 1 is an enlarged view of the A ring in

[0015] Figure 3 is Figure 1 is an enlarged view of the B ring in

[0016] Figure 4 is a structural diagram of the arc striking stove head of the present application.

[0017] Figure 5 is a structural diagram of the second cathode plate of the present application.

[0018] Figure 6 is a structural diagram of the insulating part of the present application.

[0019] Figure 7It is the structural diagram of the first cathode plate of the application.

[0020] Figure 8 It is the structural diagram of the circuit board of the application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0022] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0023] In addition, in the description of the application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements, it can be wireless connection, or wired connection. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the application described later can be combined with each other as long as there is no conflict between them.

[0025] Please refer to Figures 1-8 In the embodiments of the application, an arc striking type furnace end comprises a first cathode plate 10, a ceramic ring 20, a second cathode plate 30, a circuit board 40 and a plurality of plasma combustion devices. A single plasma combustion device is composed of a coaxially arranged cathode tube 51, an insulating part 52 and an anode needle 53.

[0026] In the embodiments of the application, the insulating part 52 is a bottom nearly closed cylindrical structure, a downward extending lower insulating tube 521 is arranged at the center position of the bottom of the insulating part 52, an anode passage 5210 inside the lower insulating tube 521 penetrates the bottom of the insulating part 52, an upward extending upper insulating tube 522 is arranged at the edge position of the bottom of the insulating part 52, and an arc striking passage 5220 inside the upper insulating tube 522 penetrates the bottom of the insulating part 52.

[0027] The upper end surface of the second cathode plate 30 is provided with a plurality of arc striking needles 32 corresponding to the plasma combustion device, which extend upward through the arc striking channel 5220; the circuit board 40 is provided with a plurality of needle holes 41 corresponding to the anode needles 53 and suitable for the anode needles 53, the bottom of the anode needle 53 is arranged in the needle hole 41, and the upper end of the anode needle 53 extends upward through the anode channel 5210.

[0028] The second cathode plate 30 is electrically connected with the power supply ground electrode through an electromagnetic switch (not shown in the figure), and the conduction or shutdown of the electromagnetic switch is controlled by the knob (not shown in the figure) of the electric flame cooker. When the electric flame cooker is started, the user presses the knob downward, starts the current input electromagnetic switch, and the electromagnetic switch is turned on, so that the second cathode plate 30 is in electrical connection with the power supply ground electrode; at the same time, the user rotates the knob, and the anode needle 53 is in electrical connection with the power supply, and the power supply anode outputs high voltage to the anode needle 53 through the voltage boosting and voltage doubling circuit.

[0029] The distance between the anode needle 53 (connected to high voltage) and the arc striking needle 32 (connected to the power supply ground electrode) can be set to be between 3mm-10mm, and initial discharge is generated under this distance; the distance between the anode needle 53 and the cathode tube 51 (connected to the power supply cathode) can be set to be between 10mm-30mm. The setting of the arc striking needle 32 shortens the arc striking distance between the anode needle 53 and the cathode tube 51, so that the two poles are more likely to generate plasma arc. When the electric flame cooker is started, the working voltage applied between the anode needle 53 and the arc striking needle 32 generates initial discharge, the arc striking distance between the anode needle 53 and the cathode tube 51 is shortened by using the arc striking needle 32, so that the anode needle 53 and the cathode tube 51 are more likely to generate plasma arc; then the user stops pressing the knob, the electromagnetic switch is turned off, and the second cathode plate 30 is electrically disconnected with the power supply ground electrode, at this time, the stable high-temperature plasma arc has been formed between the anode needle 53 and the cathode tube 51, and continuous heating is realized.

[0030] The spatial distance between the anode needle 53 and the cathode tube 51 is lengthened, the plasma arc stroke is longer, the electron collision opportunity and frequency are increased, the “electron avalanche” effect is easy to form, the energy is larger, and therefore the heating efficiency is improved and the electric energy is saved; the arc striking needle 32 shortens the initial arc striking distance, solves the problem that the direct arc striking between the anode needle 53 and the cathode tube 51 is difficult due to the lengthening of the distance, and improves the success rate of starting the electric flame cooker.

[0031] The present application optimizes the structure of the furnace head and the electric arc stroke, balances the starting reliability and energy efficiency, and provides technical support for the efficient operation of the electric flame cooker.

[0032] In the embodiment of the present application, not only the structure of the furnace head is optimized, but also the assembly efficiency of the furnace head is improved.

[0033] The first cathode plate 10 is provided with a plurality of upper mounting holes 11 corresponding to the cathode tube 51, and the bottom outer side of the cathode tube 51 is provided with a mounting ring 510, the outer diameter of the mounting ring 510 is greater than the inner diameter of the upper mounting hole 11, during assembly, the cathode tube 51 passes through the upper mounting hole 11, and the mounting ring 510 is naturally clamped on the lower surface of the first cathode plate 10, so that the cathode tube 51 is quickly positioned.

[0034] The top surface of the insulating part 52 abuts against the bottom surface of the cathode tube 51.

[0035] The second cathode plate 30 is provided with a plurality of lower mounting holes 31 corresponding to the lower insulating tube 521, and the arc guide pin 32 is arranged at the edge of the lower mounting hole 31 of the second cathode plate 30, the arc guide pin 32 passes through the internal arc guide channel 5220 of the upper insulating tube 522 from the bottom of the insulating part 52, and the lower insulating tube 521 passes through the lower mounting hole 31 and extends downward, and the bottom of the insulating part 52 abuts against the second cathode plate 30 at the edge of the lower mounting hole 31, so that the insulating part 52 is formed in a double-directional limiting mode.

[0036] The middle section of the inner part of the ceramic ring 20 is provided with a limiting part 21, the limiting part 21 can be a plurality of limiting parts 21 arranged uniformly in the circumferential direction, or can be a limiting part 21 formed in a ring shape along the circumferential direction of the inner part of the ceramic ring 20, which is not limited herein. The upper end surface of the limiting part 21 abuts against the second cathode plate 30, and the top surface of the ceramic ring 20 abuts against the first cathode plate 10.

[0037] The lower end of the anode pin 53 is provided with a limiting ring 530, the outer diameter of the limiting ring 530 is greater than the inner diameter of the lower insulating tube 521, during assembly, the anode pin 53 passes through the anode channel 5210 in the inner part of the lower insulating tube 521, and the limiting ring 530 is clamped on the bottom of the lower insulating tube 521, so that the axial fixation of the anode pin 53 is realized through the bidirectional pressure of the lower insulating tube 521 and the edge of the pin hole 41 of the circuit board 40.

[0038] The first cathode plate 10 is provided with a bolt column 12, the lower end of the bolt column 12 abuts against the upper end surface of the circuit board 40, and the bolt column 12 is fixed with the circuit board 40 through a screw, so that the limiting and overall fastening of the first cathode plate 10, the ceramic ring 20, the second cathode plate 30, the plasma combustion device and the circuit board 40 are completed, and the synchronous fixation process of a plurality of components is simplified.

[0039] The components of the plasma combustion device of the present application are self-positioned through their own structures (such as the mounting ring 510, the limiting ring 530 and the limiting part 21), the dependence on tool clamps is reduced, and the plasma combustion device cancels the traditional complex connecting parts (such as additional buckles, supports or threaded fastenings), the main positioning is realized through abutment and clamping, and the screw is only used for final overall fastening.

[0040] The optimization of the structure of the plasma combustion device of the present application ensures that the components will not be loosened due to thermal expansion in an extreme working temperature state, and the stability of the structure is ensured.

[0041] In this embodiment of the present invention, a burner cavity 100 is formed between the first cathode plate 10, the second cathode plate 30, and the upper end of the ceramic ring 20. An intake fan 8 is mounted on the lower end surface of the second cathode plate 30 and communicates with the burner cavity 100. An air inlet hole 523 is formed in the sidewall of the insulating member 52, connecting the interior of the plasma combustion device with the burner cavity 100. The airflow delivered to the burner cavity 100 by the intake fan 8 precisely enters each plasma combustion device through the air inlet hole 523, ensuring continuous airflow to eject plasma.

[0042] Copper foil is laid on the inner wall of the pinhole 41 and the edge of the pinhole 41 of the circuit board 40, and is electrically connected to the anode end of the circuit board 40 through a copper foil wire.

[0043] In this embodiment of the present invention, the inner wall of pinhole 41 on circuit board 40 is completely covered with copper foil, forming a circular conductive layer. Copper foil is also laid on the surface of circuit board 40 at the edge of pinhole 41, forming a continuous conductive area with the inner copper foil. The copper foil has excellent conductivity and a large contact area with anode needle 53 (limiting ring 530), ensuring stable transmission of 10,000 volts of high voltage to anode needle 53. The copper foil conductor can be laid on the upper and lower surfaces of circuit board 40 or inside circuit board 40, without limitation.

[0044] An electric flame stove includes any of the aforementioned arc-starting burners, further comprising a panel 6 and a stove box 7. A plurality of support columns 71 are provided at the bottom of the stove box 7. The support columns 71 abut the lower end surface of a circuit board 40, providing rigid support for the circuit board 40. The support columns 71 create a gap between the circuit board 40 and the bottom of the stove box 7. When a small amount of water seeps into the stove box 7 (e.g., from overflowing soup during cooking), the water flows out along the bottom of the stove box 7 rather than directly soaking the circuit board 40.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. An arc-starting burner head, characterized in that: It includes: a first cathode plate, a ceramic ring, a second cathode plate, a circuit board, and a plurality of plasma combustion devices; A single plasma combustion device is composed of a coaxially arranged cathode tube, an insulating member and an anode needle; The insulating member is a cylindrical structure with a nearly closed bottom. A lower insulating tube extending downward is provided at the center of the bottom of the insulating member. The anode channel inside the lower insulating tube passes through the bottom of the insulating member. An upper insulating tube extending upward is provided at the edge of the anode channel at the bottom of the insulating member. The arc striking channel inside the upper insulating tube passes through the bottom of the insulating member. The upper end surface of the second cathode plate is provided with a plurality of arc-starting needles corresponding to the plasma combustion device, and the arc-starting needles extend upward through the arc-starting channel; The circuit board is provided with a plurality of pinholes corresponding to and adapted to the anode pins. The bottoms of the anode pins are arranged in the pinholes, and the upper ends of the anode pins pass through the anode channels and extend upward.

2. The arc-starting type furnace head according to claim 1, characterized in that: The second cathode plate is electrically connected to the power ground via an electromagnetic switch.

3. The arc-starting type furnace head according to claim 1, characterized in that: The first cathode plate is provided with a plurality of upper mounting holes corresponding to the cathode tubes. A mounting ring is provided on the outer side of the bottom of the cathode tube. The outer diameter of the mounting ring is larger than the inner diameter of the upper mounting hole. The top surface of the insulating member abuts against the bottom surface of the cathode tube.

4. The arc-starting type furnace head according to claim 1, characterized in that: The second cathode plate is provided with a plurality of lower mounting holes corresponding to the lower insulating tube, the arc starting needle is arranged on the second cathode plate at the edge of the mounting hole, the lower insulating tube extends downward through the lower mounting hole, and the bottom of the insulating member abuts against the second cathode plate at the edge of the lower mounting hole.

5. The arc-starting type furnace head according to claim 1, characterized in that: A limiting member is provided in the middle section inside the ceramic ring, the upper end surface of the limiting member abuts against the second cathode plate, and the top surface of the ceramic ring abuts against the first cathode plate.

6. The arc-starting type furnace head according to claim 1, characterized in that: A limiting ring is provided at the lower end of the anode needle, the outer diameter of the limiting ring is larger than the inner diameter of the lower insulating tube, and the limiting ring is installed between the bottom of the insulating tube and the edge of the pinhole of the circuit board.

7. The arc-starting type furnace head according to claim 1, characterized in that: The first cathode plate is provided with a bolt column, the bolt column abuts against the upper end surface of the circuit board, and is fixed to the circuit board by screws so that the first cathode plate is firmly fixed to the circuit board.

8. The arc-starting type furnace head according to claim 1, characterized in that: A furnace head cavity is formed between the first cathode plate, the second cathode plate and the upper end of the ceramic ring. An air intake fan is installed on the lower end surface of the second cathode plate, and the air intake fan is connected to the furnace head cavity. An air intake hole is opened on the side wall of the insulating member, and the air intake hole connects the interior of the plasma combustion device with the furnace head cavity.

9. The arc-starting type furnace head according to claim 1, characterized in that: Copper foil is laid on the inner wall of the pinhole and the edge of the pinhole of the circuit board, and is electrically connected to the anode end of the circuit board through a copper foil wire.

10. An electric flame cooker, characterized in that: The arc-starting burner comprises the burner head according to any one of claims 1 to 9, further comprising a panel and a stove box, wherein a plurality of support columns are provided at the bottom of the stove box, and the support columns abut against the lower end surface of the circuit board.

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