Electric flame stove burner

Abstract

The present invention discloses a burner head for 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 together form a stove cavity; the top shell is provided with a plurality of mounting holes adapted to the ceramic nozzles, the edge of each mounting hole is provided with a plurality of electrode sheets, the gap between any two adjacent electrode sheets forms a mounting groove, and a ceramic limiter corresponding to the mounting groove is provided on the outer side of the bottom of the ceramic nozzle. The ceramic structure of the present invention is used to guide plasma spraying, solving the problems of deformation, ablation, and unstable discharge caused by high temperature in the high-power electric flame stove nozzle in the prior art; the present invention reduces the number of independent accessories, and the accessories are connected by embedding and abutting, and finally the top shell and the bottom shell are fixed by bolts, so as to achieve rapid installation and disassembly, facilitate the installation and maintenance of internal components, and reduce maintenance costs.

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 pintle, an upper ceramic tube, a lower ceramic tube and an anode needle. The cathode pintle is arranged so that the plasma jet hits the head of the cathode pintle and then ejects radially, so that its energy is dispersed over a larger range, thereby achieving uniform heating of the cookware.

[0004] The cathode nozzle and cathode pin in this prior art serve as the cathode for circuit return. They are made of conductive materials. Stainless steel (such as 304 stainless steel) has a melting point of approximately 1400°C and can operate stably in conventional electric flame cookers (plasma temperatures range from 1000°C to 1400°C). It is both conductive and heat-resistant, making it the most common cathode material in prior art.

[0005] However, the plasma flame temperature generated by high-power electric flame cookers can exceed 1500°C, far exceeding the melting point of stainless steel. At this point, the cathode pintle and nozzle, which serve as the "ignition fuse," can suffer from material softening, surface corrosion, and deformation due to the high temperatures. Choosing materials that are both heat-resistant and highly conductive (such as molybdenum and tungsten) for the pintle and nozzle is expensive, significantly increasing the manufacturing cost of the electric flame cooker.

[0006] At the same time, the existing technology also has technical problems such as a large number of independent accessories and complicated installation. For example, a high-power electric flame stove usually has hundreds of plasma burners, while a single anode needle in the existing technology 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 comprises: a top shell, a plurality of ceramic nozzles, a plurality of anode needles, a bottom shell and a plurality of through holes; the top shell and the bottom shell together form a furnace cavity, and is characterized in that:

[0010] The top shell is provided with a plurality of mounting holes adapted for the ceramic nozzle, and a plurality of electrode sheets are provided at the edge of each mounting hole. The gap between any two adjacent electrode sheets constitutes a mounting groove, and a ceramic stopper corresponding to each mounting groove is provided on the outer side of the bottom of the ceramic nozzle;

[0011] A discharge ring is provided on the outer side of the upper end of the anode needle, and a plurality of electrode sheets and a plurality of ceramic limiters are arranged alternately, and a discharge area is formed between the discharge ring and the electrode sheets;

[0012] 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 hole, so that when the lower end of the anode needle passes through the through hole, the bottom abutment surface of the upper end of the anode needle is in contact with the upper abutment surface along the circumference of the through hole;

[0013] A pintle ceramic component for a plasma injection channel is further provided inside the upper end of the ceramic nozzle. The ceramic nozzle and the pintle ceramic component are connected via a plurality of ribs, and the bottom surface of the pintle ceramic component abuts against the top surface of the anode needle.

[0014] Preferably, the ceramic nozzle, the pintle ceramic part and the plurality of ceramic limiters are 3D printed integrated ceramic structures, and the top shell and the plurality of electrode sheets are integrated stainless steel structures prepared using a mold;

[0015] Preferably, the top shell and the bottom shell are fixed by bolts;

[0016] Preferably, the ceramic nozzle and the ribs arranged inside and at the bottom thereof, the pintle ceramic member, and the plurality of ceramic stoppers are an integrated insulating ceramic structure manufactured using a mold, and the top shell and the plurality of electrode sheets are an integrated stainless steel structure manufactured using a mold;

[0017] Preferably, the bottom shell is an insulating ceramic structure;

[0018] Preferably, the bottom shell is provided with an air hole, and the lower end of the air hole is connected to an air intake fan;

[0019] Preferably, a first wind shield ring is provided on the outer side of the lower end surface of the top shell above the wind hole, and a second wind shield ring is provided 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 alternately.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] The ceramic structure of the present invention is used to guide plasma injection, solving the problems of deformation, ablation and unstable discharge caused by high temperature in the nozzle of high-power electric flame stoves in the prior art.

[0022] The present invention reduces the number of independent accessories, and the accessories are connected by embedding and abutting, and finally the top shell and the bottom shell are fixed by bolts, so that fast installation and disassembly are achieved, the installation and maintenance of internal components are convenient, and the maintenance cost is reduced;

[0023] The present invention staggers the first wind shield ring and the second wind shield ring to limit the flow rate of the airflow and prevent turbulent airflow from affecting the discharge area.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic cross-sectional view of a burner head of the present invention.

[0027] Figure 2 yes Figure 1 Enlarged view of the area circled in center A.

[0028] Figure 3 yes Figure 2 Schematic diagram of the cross section along line BB.

[0029] Figure 4 yes Figure 1 Enlarged view of the area circled in the middle.

[0030] Figure 5 yes Figure 4 Schematic diagram of the cross section along the CC line.

[0031] Figure 6 It is a structural stereogram of the top shell of the present invention.

[0032] Figure 7 yes Figure 6 Enlarged view of the area circled in middle D.

[0033] Figure 8 It is a structural stereogram of the ceramic nozzle of the present invention. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0036] Furthermore, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; internal communication between two components; and wireless or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described later can be combined with each other as long as they do not conflict with each other.

[0038] See also Figures 1 and 2 In an 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 together form a furnace cavity 100.

[0039] like Figures 2 to 8 As shown, in an embodiment of the present invention, the top shell 1 is provided with a plurality of mounting holes 12 adapted to the ceramic nozzle 2, a plurality of electrode sheets 11 are arranged on the edge of each mounting hole 12, and the gap between any two adjacent electrode sheets 11 constitutes a mounting groove 13, and a ceramic limiter 21 corresponding to the mounting groove 13 is provided on the outer side of the bottom of the ceramic nozzle 2.

[0040] During installation, it is only necessary to pass the upper end of the ceramic nozzle 2 directly through the mounting hole 12, and the ceramic limiter 21 at the bottom of the ceramic nozzle 2 is embedded in the mounting groove 13 of the top shell 1. The positioning is achieved through the circumferential restriction of the electrode sheet 11, and the mounting groove 13 can limit the rotation and excessive upward movement of the ceramic nozzle 2, thereby achieving rapid positioning and embedding of the ceramic nozzle 2 and improving assembly efficiency; when disassembling, it is only necessary to pull out the ceramic nozzle 2 downward, and no tools are required for installation and disassembly.

[0041] In the embodiment of the present invention, Figures 3 and 4 As shown, a discharge ring 31 is provided on the outer side of the upper end of the anode needle 3. Multiple electrode sheets 11 and multiple ceramic retaining members 21 are arranged alternately, forming a discharge region between the discharge ring 31 and the electrode sheets 11. Multiple electrode sheets 11 and ceramic retaining members 21 are arranged alternately around the edge of the mounting hole 12 of the top shell 1, exposing the electrode sheets 11 in a circular shape around the discharge ring 31. This prevents mutual obstruction and electric field shielding between the electrode sheets 11 and the discharge ring 31, ensuring the integrity of the two poles of the discharge region. Furthermore, the mounting grooves 13 and the electrode sheets 11 restrict the upward and circumferential rotation of the ceramic retaining members 21, ensuring the overall physical structural stability of the ceramic nozzle 2.

[0042] See Figures 1 to 8 In this embodiment of the present invention, the bottom housing 4 defines multiple through-holes 41 corresponding to the anode pins 3. The outer diameter of the upper end of the anode pins 3 is larger than the inner diameter of the through-holes 41, forming a shoulder retaining structure. During assembly, the lower end of the anode pin 3 passes through the through-holes 41 to connect to the high-voltage power supply. The upper end of the anode pin 3 is blocked by the upper surface of the bottom housing 4, preventing it from moving downward. This provides axial fixation and prevents the anode pin 3 from falling out from under the bottom housing 4.

[0043] In this embodiment of the present invention, a pintle ceramic member 22 is located within the upper end of the ceramic nozzle 2, providing a plasma jet channel. The nozzle 2 and pintle ceramic member 22 are connected by multiple ribs 23, enhancing structural rigidity. The gaps between the ribs 23, the nozzle 2, and the pintle ceramic member 22 serve as airflow channels (for plasma guidance). Ceramic materials have high melting points (e.g., alumina has a melting point of >2000°C) and are resistant to arc erosion. This ceramic structure, designed to guide plasma jets, addresses the existing issues of high-temperature-induced deformation, erosion, and unstable discharge in high-power electric flame cooker nozzles.

[0044] The bottom surface of the pintle ceramic part 22 abuts against the top surface of the anode needle 3 , and the abutting limiting structure of the two fixes the positions of the ceramic nozzle 2 and the anode needle 3 through bidirectional mechanical constraints.

[0045] In an embodiment of the present invention, the bottom shell 4 limits the downward movement of the anode needle 3 through the shoulder of the through hole 41, and the top shell 1 limits the upward movement of the ceramic nozzle 2 through the engagement of the mounting groove 13 and the ceramic limiter 21. The anode needle 3 and the ceramic nozzle 2 (through the pintle ceramic part 22) abut the limiting structure to realize bidirectional mechanical constraint, and the top shell 1 and the bottom shell 4 are fixed by bolts, so that the limiting force in the axial direction "locks" the furnace head as a whole.

[0046] In an embodiment of the present invention, the ceramic nozzle 2 and the ribs 23 arranged inside and at the bottom thereof, the pintle ceramic part 22, and the multiple ceramic limit parts 21 are an integrated insulating ceramic structure prepared by a mold, and the top shell 1 and the multiple electrode sheets 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 accessories, and the accessories are connected by embedding and abutting, and finally the top shell 1 and the bottom shell 4 are fixed by bolts, so as to achieve quick installation and disassembly, facilitate the installation and maintenance of internal components, and reduce maintenance costs.

[0047] In the embodiment of the present invention, Figure 1 As shown, the bottom shell 4 is provided with an air hole 42, the lower end of the air hole 42 is connected to the air intake fan 5, a first wind shield ring 14 is provided on the lower end surface of the top shell 1 above the air hole 42, and a second wind shield ring 44 is provided on the upper end surface of the bottom shell 4 outside the first wind shield ring 14, and the first wind shield ring 14 and the second wind shield ring 44 are arranged alternately.

[0048] When the electric flame stove is in working state, the air intake fan 5 at the lower end of the air hole 42 of the bottom shell 4 forces the external ambient air to be inhaled. The staggered arrangement of the first air shield ring 14 and the second air shield ring 44 limits the flow rate of the airflow and prevents turbulent airflow from affecting the discharge area; the air pressure in the furnace chamber 100 increases, causing the gas to flow to the discharge area. While the gas exchanges heat and cools the anode needle 3 and the electrode sheet 11, the strong electric field ionizes the gas to form plasma. The plasma is affected by the air pressure and aerodynamic force and is radially ejected along the gap (guide channel) between the ceramic nozzle 2, the pintle ceramic part 22 and the ribs 23, so that the plasma can quickly diffuse in the furnace and achieve the effect of uniformly heating the bottom of the pot.

[0049] 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. A burner head of an electric flame stove, comprising: A top shell, a plurality of ceramic nozzles, a plurality of anode needles, a bottom shell and a plurality of through holes; the top shell and the bottom shell together form a furnace chamber, characterized in that: The top shell is provided with a plurality of mounting holes adapted for the ceramic nozzle, and a plurality of electrode sheets are provided at the edge of each mounting hole. The gap between any two adjacent electrode sheets constitutes a mounting groove, and a ceramic stopper corresponding to each mounting groove is provided on the outer side of the bottom of the ceramic nozzle; A discharge ring is provided on the outer side of the upper end of the anode needle, and a plurality of electrode sheets and a plurality of ceramic limiters are arranged alternately, and a discharge area is formed between the discharge ring and the electrode sheets; 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 hole, so that when the lower end of the anode needle passes through the through hole, the bottom abutment surface of the upper end of the anode needle is in contact with the upper abutment surface along the circumference of the through hole; A pintle ceramic component for a plasma injection channel is further provided inside the upper end of the ceramic nozzle. The ceramic nozzle and the pintle ceramic component are connected via a plurality of ribs, and the bottom surface of the pintle ceramic component abuts against the top surface of the anode needle.

2. The burner head of the electric flame stove according to claim 1, characterized in that: The ceramic nozzle, the pintle ceramic part and the plurality of ceramic limiters are 3D printed integrated ceramic structures, and the top shell and the plurality of electrode sheets are integrated stainless steel structures prepared using a mold.

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

4. The burner head of the electric flame stove according to claim 1, characterized in that: The ceramic nozzle and the ribs arranged inside and at the bottom thereof, the pintle ceramic part, and the plurality of ceramic limiters are an integrated insulating ceramic structure prepared using a mold, and the top shell and the plurality of electrode sheets are an integrated stainless steel structure prepared using a mold.

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

6. The burner head of the electric flame stove according to claim 1, characterized in that: The bottom shell is provided with an air hole, and the lower end of the air hole is connected to the air intake fan.

7. The burner head of the electric flame stove according to claim 6, characterized in that: A first wind shield ring is provided on the outer side of the lower end surface of the top shell above the wind hole, and a second wind shield ring is provided 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 alternately.

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