Long-arc-shaped high-efficiency furnace end and electric flame stove

Abstract

The invention discloses a long-arc-shaped high-efficiency furnace end and an electric flame stove. The long-arc-shaped high-efficiency furnace end comprises an upper shell, a lower shell, an air inlet device and a plurality of electric flame generating devices. The cathode and the outer ceramic part are fixedly connected to form the shell of the electric flame generating device, so that the electric flame generating device is a whole, the assembly and maintenance of the electric flame stove are facilitated, and the management of the burner part is also facilitated; the anode does not need to be fixed by threads, so that the anode cannot be loosened due to thermal expansion in an extremely high temperature environment in a working state; cooling at multiple positions is arranged, so that the service life of each component is prolonged; the short spacing between the anode and the arc striking ring is easy to break down gas to form initial plasma, and the high-conductivity plasma reduces the breakdown voltage between the anode and the cathode nozzle and ensures the stability of the circuit; and a long-distance electric arc is formed between the anode head and the cathode nozzle to generate high-energy plasma, so that the discharge efficiency of the electric flame stove in a large-energy environment is improved.

Description

Technical Field

[0001] This invention specifically relates to an electric flame stove. Background Technology

[0002] An electric flame stove, also known as a plasma stove, is a new type of flame generation method. It uses a high-frequency changing electric field, where two electrodes generate an electric arc under a certain voltage. The electric arc is a beam of high-temperature ionized gas, and the electric flame stove uses the continuous electric arc as energy for heating the pot.

[0003] For example, the invention patent with application number 202311369153.9 discloses a furnace head with a rotating working medium jet, including: a cathode plate, a plurality of cathode flame tubes disposed on the cathode plate and having a hollow structure, a plurality of insulating seats, and a plurality of anode needles disposed on the insulating seats; the bottom of the insulating seat is provided with a plurality of air inlets, the air inlets being designed at an inclination and used to generate rotating air fluid within the arc generating space.

[0004] However, in order to achieve effective arc ignition, the aforementioned invention patent typically sets the gap between the anode needle and the cathode flame tube at 2-3 millimeters. While this structure allows the electric flame stove to start normally, during continuous use, the small volume of the generated electric field and the short stroke of the plasma arc between the two electrodes result in insufficient electron production, leading to low efficiency. Furthermore, the long distance between the two electrodes requires a higher breakdown voltage, which can cause circuit instability.

[0005] Meanwhile, the anode needles of this invention are fixed in the connecting groove by threads. Electric flame stoves usually have dozens or hundreds of plasma burners. The use of threads to fix numerous anode needles not only requires special tools for installation during production and maintenance, making the disassembly and assembly process cumbersome, but also the threaded connection may loosen during use or transportation in high-temperature and high-vibration working environments, affecting the normal use of the electric flame stove.

[0006] In summary, the existing technology of electric flame stoves has the technical problem of low energy efficiency due to the small distance between the two electrodes. In addition, the existing technology also has the problems of unstable anode needles and difficult and cumbersome installation. Furthermore, the two electrodes of the aforementioned patent do not receive effective heat dissipation, which can easily lead to overheating of the electrodes and affect their service life. Summary of the Invention

[0007] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0008] A long-arc type high-efficiency burner head includes: an upper shell, a lower shell, an air intake device, and multiple electric flame generating devices; A single electric flame generator consists of an outer ceramic component, an anode, a first inner ceramic component, an arc-starting electrode, a second inner ceramic component, and a cathode arranged coaxially. The outer ceramic component is a cylindrical shape with a closed bottom, and a ceramic tube extending downwards is provided on the closed bottom surface. An insulating channel is formed inside the ceramic tube that penetrates the bottom of the outer ceramic component. An annular protrusion is provided on the outer side of the middle section of the anode, the lower end of the anode is inserted into the ceramic tube, and the protrusion abuts against the bottom of the outer ceramic part; The first inner ceramic component is a cylindrical shape with a closed top. An electrode hole is provided in the center of the closed top surface. The inner diameter of the electrode hole is smaller than the outer diameter of the boss. The upper end of the anode extends upward through the electrode hole. The bottom of the arc-starting electrode abuts against the top edge of the first inner ceramic component, and the top of the arc-starting electrode abuts against the bottom of the second inner ceramic component; The cathode is a cylindrical shape with a closed top, and an upwardly extending cathode nozzle is provided on its closed top surface. The bottom of the cathode nozzle abuts against the top of the second inner ceramic component, and the lower end of the cathode is fixedly connected to the outer ceramic component. Preferably, an installation ring is provided on the outer side of the bottom of the arc-starting electrode, the lower end of the installation ring abuts against the top of the outer ceramic part, and the inner wall of the cathode is provided with a stepped surface, the stepped surface abuts against the upper end of the installation ring; Preferably, the cathode has a radially arranged first guide hole on its sidewall, the mounting ring has a second guide hole that is interconnected vertically, the first inner ceramic component has a radially arranged third guide hole on its sidewall, and the closed surface at the top of the first inner ceramic component has a swirling hole. Preferably, the swirling orifice is inclined to the central axis of the electric flame generating device; Preferably, an arc-inducing ring is provided in the middle section of the inner wall of the arc-inducing pole, the upper end face of the arc-inducing ring abuts against the bottom of the second inner ceramic component, and the lower end face of the arc-inducing ring abuts against the top surface of the first inner ceramic component; Preferably, the closest distance between the anode and the arc-starting ring is 2-3 mm; Preferably, the closest distance between the anode and the cathode nozzle is 5-10 mm; Preferably, the upper shell and the lower shell are fixedly connected and enclose each other to form a furnace head cavity, and the air intake device is in communication with the furnace head cavity; Preferably, the upper shell and the lower shell are respectively provided with a plurality of upper through holes and lower through holes, the upper through holes and the lower through holes are one-to-one corresponding, the electric flame generating device is installed in the furnace head cavity, the cathode nozzle extends upward through the upper through hole, and the ceramic tube extends downward through the lower through hole; The present invention also proposes an electric flame stove, comprising the long arc-shaped high-efficiency burner head described in any one of the above-mentioned methods.

[0009] Compared with the prior art, the advantages of the present invention are: The cathode of the present invention is fixedly connected to the outer ceramic part to form the outer shell of the electric flame generating device, making the electric flame generating device an integral unit, which facilitates the assembly and maintenance of the electric flame stove, and also facilitates the management of the burner components; The anode of this invention does not require thread fixing, so that the anode will not loosen due to thermal expansion in extremely high temperature environments during operation; In this invention, air inside the furnace head cavity is introduced into the cooling channel through the first guide hole under pressure, thereby cooling the second inner ceramic component and the arc-starting electrode. At the same time, the third guide hole introduces the airflow from the transition channel into the heat dissipation channel to cool the anode. The cooling in multiple places extends the service life of each component. The short spacing between the anode and the arc-starting ring in this invention facilitates the breakdown of gas to form initial plasma. The highly conductive plasma rotates and rises, which reduces the "actual discharge distance" between the anode and cathode nozzles with a long spacing, thereby reducing the breakdown voltage between the anode and cathode nozzles and ensuring the stability of the circuit.

[0010] A long-distance electric arc is formed between the anode head and the cathode nozzle. The increase in electrons in this local electric field increases the number of collisions between the initial plasma and electrons, forming an "electron avalanche phenomenon" that generates high-energy plasma and improves the discharge efficiency of the electric flame stove in a high-energy environment.

[0011] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a cross-sectional view of the furnace head of the present invention.

[0014] Figure 2 This is a cross-sectional view of the electric flame generating device of the present invention.

[0015] Figure 3 This is an exploded view of the electric flame generating device of the present invention.

[0016] Figure 4 This is a schematic diagram of the structure of the first internal ceramic component and the arc-starting electrode of the present invention. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0019] Furthermore, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] See also Figures 1-4 In this embodiment of the invention, a long arc-shaped high-efficiency burner head includes: an upper shell 2, a lower shell 3, an air intake device 4, and multiple electric flame generating devices 1; A single electric flame generating device 1 consists of an outer ceramic component 11, an anode 12, a first inner ceramic component 13, an arc-starting electrode 14, a second inner ceramic component 15, and a cathode 16 arranged coaxially.

[0022] The outer ceramic part 11 is a cylindrical shape with a closed bottom. A ceramic tube 111 extending downward is provided on the closed bottom surface of the ceramic tube 111, and an insulating channel is formed inside the ceramic tube 111 that penetrates the bottom of the outer ceramic part 11.

[0023] An annular boss 121 is provided on the outer side of the middle section of the anode 12. The lower end of the anode 12 is inserted into the ceramic tube 111, and the anode 12 is electrically connected to the positive terminal of the circuit through this insulating channel. The boss 121 abuts against the bottom of the outer ceramic part 11, limiting the excessive downward movement of the anode 12. The first inner ceramic part 13 is a cylindrical shape with a closed top. An electrode hole 131 is opened in the center of its closed top surface. The inner diameter of the electrode hole 131 is smaller than the outer diameter of the boss 121. The upper end of the anode 12 extends upward through the electrode hole 131. At this time, the closed top surface of the first inner ceramic part 13 and the bottom of the outer ceramic part 11 exert bidirectional clamping on the boss 121, realizing the positioning and installation of the anode 12.

[0024] The bottom of the arc-starting electrode 14 abuts against the top edge of the first inner ceramic component 13, and the top of the arc-starting electrode 14 abuts against the bottom of the second inner ceramic component 15. Specifically, an arc-starting ring 141 is provided in the middle section of the inner wall of the arc-starting electrode 14, the lower end face of the arc-starting ring 141 abuts against the top surface of the first inner ceramic component 13, and the bottom of the second inner ceramic component 15 abuts against the upper end face of the arc-starting ring 141. Figure 2-Figure 4 As shown, in this embodiment, an annular step shape can be provided on the outer side of the bottom of the second inner ceramic component 15. The step surface abuts against the top surface of the arc-starting pole 14, and the bottom of the second inner ceramic component 15 is embedded in the upper end of the arc-starting pole 14, so that the second inner ceramic component 15 is radially positioned.

[0025] The cathode 16 is a cylindrical shape with a closed top. An upwardly extending cathode nozzle 161 is provided on its closed top surface. The bottom of the cathode nozzle 161 abuts against the top of the second inner ceramic component 15. The lower end of the cathode 16 is fixedly connected to the outer ceramic component 11, which can be achieved through threaded connection, snap-fit ​​connection, or welding. The fixed connection between the cathode 16 and the outer ceramic component 11 forms the outer shell of the electric flame generating device 1, making the electric flame generating device 1 a single unit. This facilitates the assembly and maintenance of the electric flame stove and the management of the burner components. In this embodiment, the cathode 16 and the outer ceramic component 11 are connected by threads, which facilitates maintenance in case of malfunction of the electric flame generating device 1.

[0026] In this embodiment of the invention, the anode 12 does not require thread fixing, so that the anode 12 will not loosen due to thermal expansion in extremely high temperature environments during operation.

[0027] In this embodiment of the invention, an installation ring 143 is provided on the outer side of the bottom of the arc-starting electrode 14. The lower end of the installation ring 143 abuts against the top of the outer ceramic part 11. The inner wall of the cathode 16 is provided with a stepped surface. The stepped surface abuts against the upper end of the installation ring 143. The installation ring 143 also realizes the electrical connection between the arc-starting electrode 14 and the cathode 16.

[0028] In embodiments of the present invention, such as Figure 2-Figure 4As shown, a radially arranged first guide hole 162 is provided on the side wall of the cathode 16. A cooling channel 200 is formed between the outer wall of the cathode 16, the outer wall of the second inner ceramic component 15, and the outer wall of the arc-starting electrode 14. Air in the furnace head cavity 100 is introduced into the cooling channel 200 through the first guide hole 162 under pressure, and the air exchanges heat with the second inner ceramic component 15 and the arc-starting electrode 14. The mounting ring 143 has a second guide hole 142 that is interconnected at the top and bottom. A transition channel 300 is formed between the inner wall of the outer ceramic part 11 and the outer wall of the first inner ceramic part 13. The second guide hole 142 allows the gas in the cooling channel 200 to flow to the transition channel 300. The side wall of the first inner ceramic component 13 is provided with a radially arranged third guide hole 132. A heat dissipation channel 400 is formed between the inner wall of the first inner ceramic component 13 and the boss 121. The radially arranged third guide hole 132 allows the airflow of the transition channel 300 to be introduced into the heat dissipation channel 400. The airflow impacts the boss 121, thereby cooling the anode 12. The top closed surface of the first inner ceramic component 13 is provided with a swirling hole 133. The swirling hole 133 is inclined to the central axis of the electric flame generator 1. After the hot gas in the heat dissipation channel 400 passes through the swirling hole 133, it forms a rotating airflow in the arc-starting ring 141.

[0029] The working principle of the electric flame generator 1 is as follows: The closest distance between the anode 12 and the arc-starting ring 141 is only 2-3 mm. When the gas enters the gap between the anode 12 and the arc-starting ring 141, under the action of tens of thousands of volts of high voltage input to the anode 12, the gas breaks down and discharges, forming the initial plasma. The initial plasma moves towards the cathode nozzle 161 with the aerodynamic force. Although the closest distance between the anode 12 and the cathode nozzle 161 is 5-10 mm, there is difficulty in high-voltage breakdown (breaking down the gas requires a higher voltage). However, plasma is a highly conductive material. Therefore, the flow of the initial plasma leads to a reduction in the actual discharge distance between the anode 12 and the cathode nozzle 161, and the required breakdown voltage also decreases. Finally, a long-distance arc is formed between the head of the anode 12 and the cathode nozzle 161. The number of electrons in this local electric field increases, which increases the number of collisions between the initial plasma and electrons, forming an "electron avalanche phenomenon" and generating high-energy plasma.

[0030] In this embodiment of the invention, the upper shell 2 and the lower shell 3 are fixedly connected and enclose to form a furnace head cavity 100. The air intake device 4 is connected to the furnace head cavity 100 and draws in external air to provide sufficient gas for multiple electric flame generating devices 1.

[0031] In this embodiment of the invention, the upper shell 2 and the lower shell 3 are respectively provided with multiple upper through holes and lower through holes, which correspond one-to-one. The electric flame generating device 1 is installed in the furnace head cavity 100. The cathode nozzle 161 extends upward through the upper through hole, and the ceramic tube 111 extends downward through the lower through hole. Both the upper shell 2 and the lower shell 3 are made of metal materials, which facilitates the electrical connection of multiple cathodes 16 and simplifies the electrical connection process.

[0032] The present invention also proposes an electric flame stove, including the long arc-shaped high-efficiency burner head of any of the above.

[0033] 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 implemented 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 exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A long-arc type high-efficiency burner head, characterized in that, include: Upper housing, lower housing, air intake device, and multiple electric flame generating devices; A single electric flame generator consists of an outer ceramic component, an anode, a first inner ceramic component, an arc-starting electrode, a second inner ceramic component, and a cathode arranged coaxially. The outer ceramic component is a cylindrical shape with a closed bottom, and a ceramic tube extending downwards is provided on the closed bottom surface. An insulating channel is formed inside the ceramic tube that penetrates the bottom of the outer ceramic component. An annular protrusion is provided on the outer side of the middle section of the anode, the lower end of the anode is inserted into the ceramic tube, and the protrusion abuts against the bottom of the outer ceramic part; The first inner ceramic component is a cylindrical shape with a closed top. An electrode hole is provided in the center of the closed top surface. The inner diameter of the electrode hole is smaller than the outer diameter of the boss. The upper end of the anode extends upward through the electrode hole. The bottom of the arc-starting electrode abuts against the top edge of the first inner ceramic component, and the top of the arc-starting electrode abuts against the bottom of the second inner ceramic component; The cathode is a cylindrical shape with a closed top, and an upwardly extending cathode nozzle is provided on its closed top surface. The bottom of the cathode nozzle abuts against the top of the second inner ceramic component, and the lower end of the cathode is fixedly connected to the outer ceramic component.

2. The long-arc type high-efficiency burner head according to claim 1, characterized in that, An installation ring is provided on the outer side of the bottom of the arc-starting electrode, and the lower end of the installation ring abuts against the top of the outer ceramic component. The inner wall of the cathode is provided with a stepped surface, and the stepped surface abuts against the upper end of the installation ring.

3. The long-arc type high-efficiency burner head according to claim 2, characterized in that, The cathode has a radially arranged first guide hole on its sidewall, the mounting ring has a second guide hole that is interconnected vertically, the first inner ceramic component has a radially arranged third guide hole on its sidewall, and the closed surface at the top of the first inner ceramic component has a swirling hole.

4. The long-arc type high-efficiency burner head according to claim 3, characterized in that, The swirling orifice is inclined to the central axis of the electric flame generating device.

5. The long-arc type high-efficiency burner head according to claim 2, characterized in that, An arc-inducing ring is provided in the middle section of the inner wall of the arc-inducing pole. The upper end face of the arc-inducing ring abuts against the bottom of the second inner ceramic component, and the lower end face of the arc-inducing ring abuts against the top surface of the first inner ceramic component.

6. The long-arc type high-efficiency burner head according to claim 5, characterized in that, The closest distance between the anode and the arc-starting ring is 2-3 mm.

7. The long-arc type high-efficiency burner head according to claim 6, characterized in that, The closest distance between the anode and the cathode nozzle is 5-10 mm.

8. The long-arc type high-efficiency burner head according to claim 7, characterized in that, The upper shell and the lower shell are fixedly connected and enclose each other to form a furnace head cavity, and the air intake device is connected to the furnace head cavity.

9. The long-arc type high-efficiency furnace head according to claim 8, characterized in that, The upper shell and the lower shell are respectively provided with multiple upper through holes and lower through holes, and the upper through holes and lower through holes correspond one to one. The electric flame generating device is installed in the furnace head cavity. The cathode nozzle extends upward through the upper through hole and the ceramic tube extends downward through the lower through hole.

10. An electric flame stove, characterized in that, The long-arc type high-efficiency burner head includes any one of claims 1-9 above.

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