Burner structure and electric flame stove

Abstract

The present invention discloses a stove head structure and an electric flame stove, comprising: a metal top shell, a ceramic bottom plate, a plasma assembly and an air intake device; the plasma assembly is composed of an anode needle, a ceramic tube and a cathode nozzle; the outer wall of the ceramic head is provided with a plurality of ventilation slots along the circumferential direction; the folded side wall of the metal top shell is provided with an air inlet hole, and a non-return member is installed at the expanded end of the air inlet hole. The ceramic tube structure of the ceramic tube of the present invention with ventilation slots on the outer wall of the ceramic head not only reduces the cost of ceramic tube preparation, but also reduces the installation cost, while ensuring that the electrode needle will not be deformed and loosened due to thermal expansion, and realizes convection between the ventilation slot and the ejection port of the cathode nozzle, thereby improving the stability and efficiency of plasma flame injection; the present invention adopts a conical air inlet hole, a concave-convex surface design, and a non-return member made of silicone rubber material, which effectively realizes normal air intake and cuts off hot air backflow, and the cost of the non-return member is low.

Description

Technical Field

[0001] The invention relates to a burner structure, 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] As a new type of kitchen stove, there are still many technical problems in the prior art that require technical improvements by those skilled in the art.

[0004] For example, in the prior art, electrode needles are usually fixed to ceramic insulating parts by threads. When the electrode needles, which are metal conductors, discharge, they generate temperatures of thousands of degrees Celsius. The high temperature causes the electrode needles to expand and deform, becoming loose or even falling off. In addition, high-power electric flame stoves have hundreds of electrode needles, and fixing the electrode needles by manual threads invisibly increases labor costs.

[0005] In order to solve the above technical problems, the invention patent with authorization announcement number CN118532725B discloses an electric flame stove burner structure that prevents electromagnetic external radiation and has a strong structure. Its plasma component uses a clamping and abutting method to stably fix the electrode needle between two ceramic tubes, and does not require threaded connection or other connection methods. High temperature can easily cause the electrode needle to loosen and fall off.

[0006] However, in the above-mentioned invention patent, the number of ceramic tubes is doubled, and the air inlet groove opened in the first ceramic tube needs to reserve a hole for an iron needle and manually remove the needle. The process is cumbersome and costly. The above-mentioned invention patent does not fundamentally solve the problem of reducing the preparation cost; at the same time, the above-mentioned invention patent also has functional technical problems. When the working medium gas enters the air inlet groove of the ceramic tube wall, radial centrifugal aerodynamic force is generated. When the gas rotates, it collides and rubs against each other, causing the aerodynamic force to be lost. Although a flamethrower nozzle outlet contraction design is adopted, it still cannot make up for the loss of kinetic energy of the working gas, affecting the heating efficiency of the cookware.

[0007] In addition, after finishing cooking, users tend to turn off the power immediately. After shutting down, the cooling fan stops immediately, and the residual heat from the burner flows back into the stove body, accelerating the aging of electronic components.

[0008] In response to the above-mentioned technical problems in the field of electric flame stoves, the present invention has invented an electric flame stove through technical transformation, which has stable electrode needles, simplified ceramic tube preparation process, reduced number of ceramic tubes, high-efficiency "fire-spraying" effect, and prevents the heat of the burner structure from affecting electronic components. Summary of the Invention

[0009] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0010] A furnace head structure, comprising: a metal top shell, a ceramic bottom plate, a plasma assembly, and an air intake device; the metal top shell and the ceramic bottom plate together enclose a furnace head structure cavity; the plasma assembly comprises an anode needle, a ceramic tube, and a cathode nozzle; the ceramic tube comprises a ceramic head and a tube body; the outer diameter of the ceramic head is larger than the outer diameter of the tube body; the outer wall of the ceramic head is circumferentially defined with a plurality of ventilation slots; the folded side wall of the metal top shell is defined with an air intake hole, and a check member is mounted on the expanded end of the air intake hole;

[0011] Preferably, the cross-section of the air inlet hole is a conical structure, the contraction end of the air inlet hole is connected to the burner structure cavity, and the anti-return member is designed with a concave-convex surface, wherein the convex surface of the anti-return member is in the same direction as the contraction direction of the air inlet hole;

[0012] Preferably, the anti-return member is made of elastic silicone rubber, and a plurality of ventilation slots are provided on the concave and convex surfaces thereof;

[0013] Preferably, the air intake device is connected to the air intake hole through an air duct, one end surface of the air duct abuts against the edge of the anti-return component, and the other end of the air duct is connected to the air intake device;

[0014] Preferably, the upper end surface of the ceramic head is provided with a step structure along the circumference, and the bottom end of the cathode nozzle is provided with an embedded ring corresponding to the step structure of the ceramic head;

[0015] Preferably, a limiting ring is provided in the middle section of the anode needle, and an annular groove corresponding to the limiting ring is also provided at the bottom of the tube body;

[0016] Preferably, the metal top shell is provided with a nozzle hole corresponding to the plasma component, and the ceramic bottom plate is provided with an electrode hole corresponding to the plasma component;

[0017] The present invention also provides an electric flame stove, comprising the burner structure described above.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] The ceramic tube structure of the present invention, in which ventilation slots are provided on the outer wall of the ceramic head, not only reduces the cost of manufacturing the ceramic tube, but also reduces the cost of installation. It also ensures that the electrode needle will not be deformed or loosened due to thermal expansion. Furthermore, convection is achieved between the ventilation slots and the ejection port of the cathode nozzle, thereby improving the stability and efficiency of plasma flame ejection.

[0020] The present invention adopts a conical air inlet through hole, a concave-convex surface design, and a backflow prevention member made of silicone rubber material to effectively achieve normal air intake and cut off hot air backflow, and the cost of the backflow prevention member is low.

[0021] 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

[0022] 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.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 yes Figure 1 Enlarged view of the area circled in center A.

[0025] Figure 3 It is an exploded view of the plasma assembly of the present invention.

[0026] Figure 4 It is a structural stereogram of the ceramic tube of the present invention.

[0027] Figure 5 It is a structural stereogram of the metal top shell and ceramic bottom plate of the present invention.

[0028] Figure 6 It is a structural stereogram of the anti-return component of the present invention. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] See also Figure 1 In an embodiment of the present invention, a furnace head structure includes: a metal top shell 1, a ceramic bottom plate 3, a plasma component, and an air intake device 8; the metal top shell 1 and the ceramic bottom plate 3 together form a furnace head cavity 2, and the plasma component is composed of an anode needle 4, a ceramic tube 5, and a cathode nozzle 6;

[0034] like Figures 2 to 4 As shown, the ceramic tube 5 includes a ceramic head 51 and a tube body 52. ​​The outer diameter of the ceramic head 51 is larger than that of the tube body 52. ​​A plurality of ventilation slots 511 are formed on the outer wall of the ceramic head 51 along the circumferential direction.

[0035] like Figure 3 and Figure 5 As shown, the nozzle hole 11 opened in the metal top shell 1 and the electrode hole 31 opened in the ceramic bottom plate 3 respectively provide installation positioning references for the plasma assembly; the cathode nozzle 6 passes through the nozzle hole 11 of the metal top shell 1, so that the embedding ring 61 at the bottom end of the cathode nozzle 6 abuts against the metal top shell 1; the step structure 512 arranged along the circumference of the upper end surface of the ceramic head 51 accurately corresponds to the embedding ring 61 at the bottom end of the cathode nozzle 6, and the assembly is achieved by embedding; the limiting ring 41 in the middle section of the anode needle 4 is embedded in the annular bottom of the tube body 52. The grooves 521 are interlocked with each other to limit the axial and upward movement of the anode needle 4 in the ceramic tube 5; the lower end of the anode needle 4 passes through the electrode hole 31 of the ceramic base plate 3, so that the bottom surface of the limit ring 41 and the bottom of the tube body 52 of the ceramic tube 5 abut against the ceramic base plate 3, further limiting the downward movement of the anode needle 4; the metal top shell 1 and the ceramic base plate 3 are fixed by bolts and nuts, generating a two-way tight pressure on the entire plasma assembly, ensuring that the plasma assembly remains stable in the axial direction and preventing displacement of its components due to vibration or thermal expansion and contraction.

[0036] like Figures 2 to 4As shown, in the next embodiment of the present invention, the ceramic tube 5 structure with a ventilation groove 511 on the outer wall of the ceramic head 51 does not require complicated needle retention and needle removal processes during the production and preparation process, thereby reducing the cost of preparing the ceramic tube 5; during the installation process, the ceramic tube 5 only needs to be installed in a fitting and abutting manner, so that the anode needle 4 is firmly fixed in the preset position, and the traditional complex processes such as threaded connection and welding are abandoned, which not only reduces the installation cost, but also prevents the anode needle 4 from being deformed and loosened due to heat when the electric flame stove is used; in the installed burner, the ventilation groove 511 on the outer wall of the ceramic head 51 connects the interior of the cathode nozzle 6 with the burner cavity 2, and the ventilation groove 511 forms convection with the nozzle 62 of the cathode nozzle 6, reducing the resistance, friction and turbulence of the airflow during the flow process, thereby improving the stability and efficiency of the plasma flame injection.

[0037] like Figure 1 As shown, in the next embodiment of the present invention, an air intake device 8 communicates with the air inlet hole 12 via an air duct 7. One end of the air duct 7 tightly abuts the edge of the anti-return member 9, forming a sealed connection. This ensures that all gas enters the burner cavity 2 through the air inlet hole 12, preventing efficiency loss and safety hazards caused by gas leakage. The other end of the air duct 7 is connected to the air intake device 8, ensuring stable air delivery.

[0038] like Figure 1 and Figure 6 As shown, in the next embodiment of the present invention, the conical structure of the air inlet hole 12 provides a stable support base for the anti-return member 9 with a concave-convex surface design. The anti-return member 9 is installed at the expansion end of the air inlet hole 12, with its convex surface facing the contraction direction of the air inlet hole 12. The slope of the conical hole wall of the air inlet hole 12 is consistent with the concave-convex surface contour of the anti-return member 9. When the air intake device 8 is supplying air normally, the gas flows in through the ventilation gap 91 on the concave-convex surface of the anti-return member 9. The gas pressure makes the convex surface of the anti-return member 9 close to the inner wall of the air inlet hole 12. At this time, the hole wall of the conical structure of the air inlet hole 12 can withstand and disperse the pressure on the anti-return member 9, preventing the anti-return member 9 from being washed away or damaged by the high-pressure airflow.

[0039] In the next embodiment of the present invention, the anti-return member 9 is made of elastic and high-temperature resistant silicone rubber material. When the electric flame stove is working normally, the air intake device 8 supplies air normally, and the air flow exerts pressure on the concave surface of the silicone rubber anti-return member 9, causing it to deform slightly, and the ventilation gap 91 opens to allow gas to pass through; when the electric flame stove is powered off, the air intake device 8 stops supplying air, and a pressure difference is formed between the burner cavity 2 and the other end of the air intake device 8 (inside the stove body). The pressure in the burner cavity 2 causes the rubber elasticity of the anti-return member 9 to recover, and its ventilation gap 91 quickly closes to form an anti-backfire barrier.

[0040] In the next embodiment of the present invention, one end surface of the air duct 7 closely abuts the edge of the anti-return member 9, forming an annular support surface. When abnormally high pressure conditions such as flashback occur in the burner cavity 2, the anti-return member 9 is forced by the reverse pressure to move toward the expanded end of the air inlet hole 12. At this time, the air duct 7 provides reverse support for the edge of the anti-return member 9.

[0041] In the next embodiment of the present invention, the convex surface of the anti-return member 9 faces the contraction direction of the air inlet hole 12. This unique structural design determines that when subjected to backfire pressure, the impact force can only exert pressure on the anti-return member 9 perpendicularly in the contraction direction of the air inlet hole 12, significantly reducing the actual force-bearing area of ​​the anti-return member 9 compared to a flat structure. This reduction in force-bearing area not only reduces the pressure per unit area of ​​the anti-return member 9, slowing material fatigue loss, but also reduces the deformation of the anti-return member 9 under the same impact force, further enhancing the reliability of the anti-backfire barrier.

[0042] The present invention also proposes an electric flame stove, including the above-mentioned burner structure. The circuit module in the stove body of the electric flame stove generates working heat, and the circuit module is heat exchanged through a cooling fan. The hot gas in the stove body is sucked into the burner cavity 2 by the air intake device 8, providing sufficient gas for the burner cavity 2. The hot working gas makes it easier to generate plasma, thereby improving the thermal efficiency of the electric flame stove.

[0043] 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 structure, comprising: Metal top shell, ceramic bottom plate, plasma component and air intake device; characterized by: The metal top shell and the ceramic bottom plate together form a furnace head structure cavity, and the plasma assembly is composed of an anode needle, a ceramic tube and a cathode nozzle; The ceramic tube includes a ceramic head and a tube body. The outer diameter of the ceramic head is larger than the outer diameter of the tube body. The outer wall of the ceramic head is provided with a plurality of ventilation slots along the circumferential direction. The middle section of the anode needle is provided with a limiting ring, and the bottom of the tube body is also provided with an annular embedding groove corresponding to the limiting ring; An air inlet hole is provided on the folded side wall of the metal top shell, a check piece is installed at the expansion end of the air inlet hole, the cross section of the air inlet hole is a conical structure, the contraction end of the air inlet hole is connected to the burner structure cavity, the check piece is designed with a concave-convex surface, wherein the convex surface of the check piece is in the same direction as the contraction direction of the air inlet hole, the check piece is made of elastic silicone rubber, and a plurality of ventilation slots are also provided on the concave-convex surface; The air intake device is connected to the air intake hole through an air duct, one end surface of the air duct abuts against the edge of the anti-return component, and the other end of the air duct is connected to the air intake device.

2. The burner structure according to claim 1, characterized in that: A step structure is provided on the upper end surface of the ceramic head along its circumference, and an embedding ring corresponding to the step structure of the ceramic head is provided at the bottom end of the cathode nozzle.

3. The burner head structure according to claim 1, characterized in that: The metal top shell is provided with a nozzle hole corresponding to the plasma component, and the ceramic bottom plate is provided with an electrode hole corresponding to the plasma component.

4. An electric flame cooker, characterized in that: The electric flame stove comprises the burner structure according to any one of claims 1 to 3.

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