Furnace end of electric flame stove

Abstract

The invention discloses a furnace end of an electric flame stove. The furnace end comprises a top shell, a plurality of ceramic spray pipes, a plurality of ceramic seats, a plurality of anode needles and a bottom shell, a furnace chamber is defined by the top shell and the bottom shell; the top shell is provided with a plurality of mounting holes matched with the ceramic spray pipes, the edge of each mounting hole is provided with a plurality of electrode plates, a gap between any two adjacent electrode plates forms a mounting groove, and the outer side of the bottom of each ceramic spray pipe is provided with ceramic limiting pieces in one-to-one correspondence with the mounting grooves. The ceramic structure is used for guiding plasma jet, and the problems of deformation, ablation and unstable discharge caused by high temperature of a high-power electric flame stove jet pipe in the prior art are solved; the number of independent accessories is reduced, all the accessories are connected in an embedded and abutting mode, finally, the top shell and the bottom shell are fixed through bolts, rapid installation and disassembly are achieved, internal components are convenient to install and overhaul, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to a burner head of an electric flame stove, in particular to an electric flame stove. Background Art

[0002] An electric flame stove is a stove that uses multiple high-voltage discharge plasma combustion devices to ionize gas to produce high-temperature plasma for heating.

[0003] For example, the invention patent with patent number 2025103206752 discloses a burner with uniform heating, including a top plate, a bottom plate, and several plasma burners. A single plasma burner includes a cathode nozzle, a cathode pin plug, an upper ceramic tube, a lower ceramic tube and an anode needle. The cathode pin plug is arranged so that the plasma jet hits the head of the cathode pin plug and then ejects radially, so that its energy is dispersed in a larger range, thereby achieving uniform heating of the cookware.

[0004] The cathode nozzle and cathode pin of the prior art are both used as the cathode of the circuit return, and are made of conductive materials. Stainless steel (such as 304 stainless steel) has a melting point of about 1400°C, can work stably in ordinary power electric flame cookers (plasma temperature is 1000°C-1400°C), has both conductivity and high temperature resistance, and is the most common cathode material in the prior art.

[0005] However, in high-power electric flame stoves, the temperature of the plasma flame generated can exceed 1500℃, far exceeding the melting point of stainless steel. At this time, the cathode pin and nozzle that bear the "ignition" function will suffer from material softening, surface corrosion, shape deformation and other problems due to high temperature burning. If materials that are both resistant to high temperatures and have good conductivity are selected as the materials of the cathode pin and nozzle, the prices of those materials are high (such as molybdenum, tungsten, etc.), which will invisibly increase the manufacturing cost of the electric flame stove.

[0006] At the same time, the prior art also has technical problems such as numerous independent accessories and complicated installation. For example, hundreds of plasma burners are usually arranged in a high-power electric flame stove, while a single anode needle in the prior art is fixed by an independent upper ceramic tube and an independent lower ceramic tube. The numerous independent accessories lead to increased production and management costs of accessories and low efficiency during installation.

[0007] The present invention aims to provide a burner head suitable for a high-power electric flame stove, wherein the burner head reduces independent parts and simplifies the installation process, thereby fundamentally reducing the manufacturing cost. Summary of the invention

[0008] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0009] A burner head of an electric flame stove, comprising: a top shell, a plurality of ceramic nozzles, a plurality of ceramic seats, a plurality of anode needles, and a bottom shell; the top shell and the bottom shell enclose a furnace cavity; The top shell is provided with a plurality of mounting holes adapted to the ceramic nozzles, and a plurality of electrode plates are arranged at the edges of each mounting hole. The gap between any two adjacent electrode plates forms a mounting groove, and ceramic limiting members corresponding to the mounting grooves one by one are arranged on the outer side of the bottom of the ceramic nozzle; The outer diameter of the upper end of the anode needle is larger than the inner diameter of the lower end of the ceramic seat, so that when the lower end of the anode needle passes through the lower end of the ceramic seat, the abutting surface of the upper end of the anode needle fits with the abutting surface of the upper end of the ceramic seat; Preferably, a discharge ring is arranged on the outer side of the upper end of the anode needle, and the plurality of electrode plates and the plurality of ceramic limiting members are arranged in a staggered manner, and a discharge area is formed between the discharge ring and the electrode plates; Preferably, the ceramic nozzle, the needle bolt ceramic member and the plurality of ceramic limiting members are an integrally formed ceramic structure by 3D printing, and the top shell and the plurality of electrode plates are an integrally formed stainless steel structure prepared by a mold; Preferably, the bottom shell is provided with a plurality of through holes corresponding to the anode needles, and the outer diameter of the upper end of the anode needle is larger than the inner diameter of the through holes; Preferably, a needle bolt ceramic member for a plasma spraying channel is further arranged inside the upper end of the ceramic nozzle, the ceramic nozzle and the needle bolt ceramic member are connected by a plurality of ribs, and the bottom surface of the needle bolt ceramic member abuts against the top surface of the anode needle; Preferably, the top shell and the bottom shell are fixed by bolts; Preferably, the ceramic nozzle and the ribs, the needle bolt ceramic member, and the plurality of ceramic limiting members arranged inside and at the bottom thereof are an integrally formed insulating ceramic structure prepared by a mold, and the top shell and the plurality of electrode plates are an integrally formed stainless steel structure prepared by a mold; Preferably, the bottom shell is an insulating ceramic structure; Preferably, the bottom shell is provided with air holes, and the lower ends of the air holes are connected to an intake fan; Preferably, a first wind shield ring is arranged on the outer side of the lower end surface of the top shell above the air holes, and a second wind shield ring is arranged on the outer side of the upper end surface of the bottom shell below the first wind shield ring, and the first wind shield ring and the second wind shield ring are arranged in a staggered manner.

[0010] Compared with the prior art, the advantages of the present invention are: The ceramic structure of the present invention is used to guide plasma spraying, which solves the problems of deformation, ablation and unstable discharge of the nozzle of a high-power electric flame stove due to high temperature in the prior art; The present invention reduces the number of independent components, and the components are connected by embedding and abutting. Finally, the top shell and the bottom shell are fixed by bolts, realizing rapid installation and disassembly, facilitating the installation and maintenance of internal components, and reducing the maintenance cost. The present invention staggeredly arranges the first wind shield ring and the second wind shield ring to limit the flow rate of the air flow and prevent the turbulent air flow from affecting the discharge area.

[0011] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 It is a schematic cross-sectional view of the burner head of the present invention.

[0014] Figure 2 is Figure 1 The enlarged view within circle A in

[0015] Figure 3 is Figure 2 The schematic cross-sectional view taken along line B-B in

[0016] Figure 4 is Figure 1 The enlarged view within circle R in

[0017] Figure 5 is Figure 4 The schematic cross-sectional view taken along line C-C in

[0018] Figure 6 It is a three-dimensional structure diagram of the top shell of the present invention.

[0019] Figure 7 is Figure 6 The enlarged view within circle D in

[0020] Figure 8 It is a three-dimensional structure diagram of the ceramic nozzle of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two elements. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] In addition, the technical features involved in different embodiments of the present invention described hereinafter can be combined with each other as long as they do not conflict with each other.

[0025] Please refer to Figures 1 to 2 , in the embodiment of the present invention, a burner head of an electric flame stove includes: a top shell 1, a plurality of ceramic nozzles 2, a plurality of anode needles 3, and a bottom shell 4; the top shell 1 and the bottom shell 4 enclose a furnace cavity 100.

[0026] As Figures 2 to 8 shown, in the embodiment of the present invention, the top shell 1 is provided with a plurality of mounting holes 12 adapted to the ceramic nozzles 2, and a plurality of electrode plates 11 are arranged at the edge of each mounting hole 12. The gap between any two adjacent electrode plates 11 forms a mounting groove 13, and the outer side of the bottom of the ceramic nozzle 2 is provided with ceramic limit members 21 corresponding to the mounting grooves 13 one by one.

[0027] During installation, only the upper end of the ceramic nozzle 2 needs to be directly passed through the installation hole 12. The ceramic limiting member 21 at the bottom of the ceramic nozzle 2 is embedded in the installation groove 13 of the top shell 1, and positioning is achieved through the circumferential limiting cooperation of the electrode sheet 11. The installation groove 13 can limit the rotation and excessive upward movement of the ceramic nozzle 2, realizing the rapid positioning and embedding of the ceramic nozzle 2 and improving the assembly efficiency. During disassembly, only the ceramic nozzle 2 needs to be pulled out downward, and no tools are required for both installation and disassembly.

[0028] In the embodiment of the present invention, as Figures 3 to 4 shown, a discharge ring 31 is provided on the outer side of the upper end of the anode needle 3. A plurality of electrode sheets 11 and a plurality of ceramic limiting members 21 are arranged alternately. A discharge area is formed between the discharge ring 31 and the electrode sheet 11. The plurality of electrode sheets 11 and the ceramic limiting members 21 are alternately arranged around the edge of the installation hole 12 of the top shell 1, so that the electrode sheets 11 are annularly exposed around the discharge ring 31, avoiding mutual shielding and electric field shielding between the electrode sheets 11 and the discharge ring 31, ensuring the integrity of both poles of the discharge area. At the same time, the installation groove 13 and the electrode sheet 11 restrict the upward and circumferential rotation of the ceramic limiting member 21, ensuring the overall physical structure stability of the ceramic nozzle 2.

[0029] Refer to Figures 1 to 8 , in the embodiment of the present invention, the bottom shell 4 is provided with a plurality of through holes 41 corresponding to the anode needles 3. The outer diameter of the upper end of the anode needle 3 is larger than the inner diameter of the through holes 41, forming a shoulder limiting structure. During assembly, the lower end of the anode needle 3 passes through the through hole 41 to connect to the high-voltage power supply, and its upper end is blocked by the upper surface of the bottom shell 4 and cannot continue to move downward, thereby realizing axial fixation and preventing the anode needle 3 from falling off from below the bottom shell 4.

[0030] In the embodiment of the present invention, a needle bolt ceramic member 22 for the plasma spraying channel is further provided inside the upper end of the ceramic nozzle 2. The ceramic nozzle 2 and the needle bolt ceramic member 22 are connected by a plurality of ribs 23 to enhance the structural rigidity. At the same time, the gaps between the ribs 23 and the ceramic nozzle 2 and the needle bolt ceramic member 22 can serve as a diversion channel for the air flow (for guiding the plasma). The ceramic material has the characteristics of high melting point (such as the melting point of alumina > 2000 °C) and resistance to arc ablation. The ceramic structure of the present invention is used to guide the plasma spraying, solving the problems of deformation, ablation, and unstable discharge of the nozzle of the high-power electric flame cooker due to high temperature in the prior art.

[0031] The bottom surface of the needle bolt ceramic member 22 abuts against the top surface of the anode needle 3, and the abutting and limiting structure of the two realizes the position fixation of the ceramic nozzle 2 and the anode needle 3 through two-way mechanical constraints.

[0032] In an embodiment of the present invention, the bottom shell 4 restricts the downward movement of the anode needle 3 through the shoulder of the through hole 41, and the top shell 1 restricts the upward movement of the ceramic nozzle 2 through the fitting of the installation groove 13 and the ceramic limiting member 21. The anode needle 3 and the ceramic nozzle 2 (through the needle bolt ceramic member 22) are in contact with the limiting structure to achieve two-way mechanical constraints. By fixing the top shell 1 and the bottom shell 4 with bolts, the limiting force in the axial direction "locks" the burner head as a whole.

[0033] In an embodiment of the present invention, the ceramic nozzle 2 and the ribs 23, the needle bolt ceramic member 22, and multiple ceramic limiting members 21 provided inside and at the bottom thereof are an integrated insulating ceramic structure prepared by a mold. The top shell 1 and multiple electrode plates 11 are an integrated stainless steel structure prepared by a mold; the bottom shell 4 is an independent insulating ceramic structure; the present invention reduces the number of independent parts, and the parts are connected by embedding and abutting. Finally, the top shell 1 and the bottom shell 4 are fixed by bolts, realizing quick installation and disassembly, facilitating the installation and maintenance of internal components, and reducing the maintenance cost.

[0034] In an embodiment of the present invention, as Figure 1 shown, the bottom shell 4 is provided with air holes 42, the lower ends of the air holes 42 are connected to the intake fan 5, a first wind blocking ring 14 is provided on the lower end surface of the top shell 1 above the air holes 42, and a second wind blocking ring 44 is provided on the upper end surface of the bottom shell 4 outside the first wind blocking ring 14. The first wind blocking ring 14 and the second wind blocking ring 44 are arranged in an alternating manner.

[0035] When the electric flame stove is in the working state, the intake fan 5 at the lower end of the air holes 42 of the bottom shell 4 forcibly sucks in the external ambient air. The alternating arrangement of the first wind blocking ring 14 and the second wind blocking ring 44 restricts the flow rate of the air flow, preventing the turbulent air flow from affecting the discharge area; the air pressure in the furnace cavity 100 increases, causing the gas to flow towards the discharge area. While the gas exchanges heat and cools the anode needle 3 and the electrode plate 11, the strong electric field ionizes the gas to form plasma. The plasma is subjected to the action of air pressure and aerodynamic force and radially jets along the gaps (flow guiding channels) between the ceramic nozzle 2, the needle bolt ceramic member 22, and the ribs 23, realizing the rapid diffusion of the plasma in the furnace chamber and achieving the effect of uniformly heating the bottom of the pot.

[0036] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A burner head of an electric flame stove, comprising: A top shell, a plurality of ceramic nozzles, a plurality of ceramic seats, a plurality of anode pins, and a bottom shell; the top shell and the bottom shell enclose a furnace cavity, and it is characterized in that: The top shell is provided with a plurality of mounting holes adapted to the ceramic nozzles, and a plurality of electrode plates are arranged at the edge of each mounting hole. The gap between any two adjacent electrode plates forms a mounting groove, and ceramic limiting members corresponding to the mounting grooves one by one are arranged on the outer side of the bottom of the ceramic nozzle; The outer diameter of the upper end of the anode pin is larger than the inner diameter of the lower end of the ceramic seat, so that when the lower end of the anode pin passes through the lower end of the ceramic seat, the abutting surface of the upper end of the anode pin is attached to the abutting surface of the upper end of the ceramic seat.

2. The burner of the electric flame stove according to claim 1, characterized in that, A discharge ring is arranged on the outer side of the upper end of the anode pin, the plurality of electrode plates and the plurality of ceramic limiting members are arranged in a staggered manner, and a discharge area is formed between the discharge ring and the electrode plates.

3. The burner of the electric flame stove according to claim 2, characterized in that, The ceramic nozzle, the needle bolt ceramic part and the plurality of ceramic limiting members are an integrally formed ceramic structure by 3D printing, and the top shell and the plurality of electrode plates are an integrally formed stainless steel structure prepared by using a mold.

4. The burner of the electric flame stove according to claim 1, characterized in that, The bottom shell is provided with a plurality of through holes corresponding to the anode pins, and the outer diameter of the upper end of the anode pin is larger than the inner diameter of the through holes.

5. The burner of the electric flame stove according to claim 1, characterized in that, A needle bolt ceramic part for a plasma spraying channel is further arranged inside the upper end of the ceramic nozzle. The ceramic nozzle and the needle bolt ceramic part are connected by a plurality of ribs, and the bottom surface of the needle bolt ceramic part abuts against the top surface of the anode pin.

6. The burner of the electric flame stove according to claim 1, characterized in that, The top shell and the bottom shell are fixed by bolts.

7. The burner of the electric flame stove according to claim 5, characterized in that, The ceramic nozzle and the ribs, the needle bolt ceramic part, and the plurality of ceramic limiting members arranged inside and at the bottom thereof are an integrally formed insulating ceramic structure prepared by using a mold, and the top shell and the plurality of electrode plates are an integrally formed stainless steel structure prepared by using a mold.

8. The burner of the electric flame stove according to claim 1, characterized in that, The bottom shell is an insulating ceramic structure.

9. The burner of the electric flame stove according to claim 1, characterized in that, The bottom shell is provided with air holes, and the lower ends of the air holes are connected to an intake fan.

10. The burner of the electric flame stove according to claim 9, characterized in that, A first wind shield ring is arranged on the outer side of the lower end surface of the top shell above the air holes, and a second wind shield ring is arranged on the outer side of the upper end surface of the bottom shell below the first wind shield ring. The first wind shield ring and the second wind shield ring are arranged in a staggered manner.

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