Burner with uniform heating function and electric flame stove

Abstract

The invention discloses a furnace end uniform in heating. The furnace end comprises a top plate, a bottom plate and a plurality of plasma combustors. A furnace chamber is defined by the top plate and the bottom plate. Due to the fact that the air inlet holes are formed in the radial direction, the position and size precision of the air inlet holes can be guaranteed by adopting a machine to pre-embed the needles and pull the needles, manual intervention is not needed, the labor cost is reduced, gas can directly impact the anode needles and take away part of heat generated by the anode needles, and a certain cooling effect on the anode needles is achieved; the electric arc generated between the anode needle and the cathode pintle is maintained in the axis space, so that direct interference or influence of airflow on the electric arc in the area is avoided; by arranging the cathode pintle, the plasma jet impacts the head of the cathode pintle and then is sprayed out in the radial direction, the energy of the plasma jet is dispersed in a larger range, the concentration ratio and the energy density of the jet are reduced, the phenomenon of local overheating is avoided, and uniform heating of cookware is achieved.

Description

Technical Field

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

[0002] The electric flame stove is a new type of cooking equipment that uses electric flame technology to use high-temperature plasma to heat the pot or food.

[0003] For example, the patent with the publication (announcement) number: CN219624118U discloses a burner head of an electric flame stove, including: a panel assembly; an ion needle assembly, the ion needle assembly includes an insulating base and an ion needle for connecting a circuit, the insulating base is provided with an electrode mounting seat, the ion needle is arranged on the electrode mounting seat, the insulating base is provided with an air inlet, and a conductive cylinder assembly, the conductive cylinder assembly is made of metal, is conical, has a large air guide radius, and a small air outlet radius; the patent realizes the effective jet of plasma to the pot body, and improves the thermal energy utilization rate of the electric flame stove. However, in specific experiments, the patent has the problem of excessive concentration of firepower and heat energy, which makes the frying pan easy to burn.

[0004] The existing technology also has the problem of complicated installation process. No matter whether it is threaded connection or welding, since there are hundreds of ion needle assemblies in the electric flame stove, it is necessary to rely on tools to fix the ion needle assemblies, which increases labor costs.

[0005] During the production process of electric flame stoves, technicians in this field also found a technical problem that needed to be solved. Since the air inlet on the insulating seat (ceramic tube) is set tangentially, it is impossible to use machines to pre-embed and remove the hole needles during the ceramic blank production process. The process requires manual intervention, which makes the efficiency low.

[0006] At the same time, during the use of the electric flame stove, since the ion needle (anode needle) is not sufficiently cooled, its heat will be transferred to the circuit board, causing the electronic components to heat up and cause damage.

[0007] The present invention aims to improve the above deficiencies in the prior art. 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 furnace head with uniform heating, comprising a top plate, a bottom plate, and a plurality of plasma burners; the top plate and the bottom plate together enclose a furnace cavity; a single plasma burner comprises a cathode nozzle, a cathode pin, an upper ceramic tube, a lower ceramic tube, and an anode needle, a plurality of convex ribs are arranged along the circumferential direction on the side surface of the cathode pin, the plurality of convex ribs are in contact with the inner circumferential wall of the upper end of the cathode nozzle, and an acceleration channel is formed between any two adjacent convex ribs and the inner wall of the cathode nozzle; The cathode needle plug head extends out of the cathode nozzle, and the outer diameter of the cathode needle plug head is greater than the inner diameter of the cathode nozzle; An electrode hole is provided at the center of the bottom of the upper ceramic tube, the lower end of the anode needle is installed between the bottom of the upper ceramic tube and the bottom of the lower ceramic tube, and the upper end of the anode needle extends upward through the electrode hole, and a plurality of air inlet holes are radially opened on the wall of the upper ceramic tube, when the gas radially enters the interior of the upper ceramic tube, the gas directly impacts the upper end of the anode needle; Preferably, a limiting ring is further provided below the bottom of the upper ceramic tube, and the limiting ring is located between the tube wall of the lower ceramic tube and the lower end of the anode needle; Preferably, the outer diameter of the lower end of the anode needle is greater than the outer diameter of the upper end thereof, so that the bottom of the upper ceramic tube is located at the edge of the electrode hole to limit the upward movement of the lower end of the anode needle; Preferably, the cathode nozzle is in the shape of a cone with a gradually contracting upper end, so that the upper end of the cathode nozzle limits the excessive upward movement of the cathode pintle; Preferably, a preset distance is left between the tip of the head of the anode needle and the cathode needle bolt, and an air duct is formed between the side of the anode needle and the upper ceramic tube; Preferably, the bottom of the cathode nozzle is installed on the top plate, and the cathode nozzle, the upper ceramic tube, and the lower ceramic tube are connected in sequence; Preferably, the bottom plate is in contact with the bottom of the lower ceramic tube, and a connecting pipe is provided below the bottom of the lower ceramic tube, and the connecting pipe passes through the bottom plate and extends downward; Preferably, the bottom plate is fixedly connected to the top plate by bolts; An electric flame cooker comprises any one of the above-mentioned burner heads with uniform heating.

[0010] Compared with the prior art, the advantages of the present invention are: Since the air inlet holes are radially arranged, the position and size accuracy of the air inlet holes can be ensured by using a machine to pre-embed and remove the needles, and no manual intervention is required, thereby reducing the labor cost. The air inlet holes of the present invention are arranged radially, and the gas directly impacts the anode needle and takes away part of the heat generated by the anode needle, thus playing a certain cooling role on the anode needle; The arc generated between the anode needle and the cathode needle plug of the present invention is maintained in the axial space, thereby avoiding direct interference or influence of the airflow on the arc in this area; The cathode pintle is arranged in the present invention so that the plasma jet is radially ejected after hitting the cathode pintle head, so that its energy is dispersed in a larger range, the concentration and energy density of the jet are reduced, the occurrence of local overheating is avoided, and the cookware is uniformly heated.

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

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0013] Figure 1 It is a structural stereogram of the present invention.

[0014] Figure 2 It is a structural cross-sectional view of the present invention.

[0015] Figure 3 is a front view of a plasma burner.

[0016] Figure 4 yes Figure 3 Cross-section along line AA.

[0017] Figure 5 yes Figure 3 Cross-section along line BB.

[0018] Figure 6 It is a three-dimensional diagram of the cathode pintle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships 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 limitations on the present invention.

[0021] In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", 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 a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal communication of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] 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.

[0023] See also Figure 1-2 In an embodiment of the present invention, a furnace head with uniform heating includes a top plate 1, a bottom plate 2, and a plurality of plasma burners 3. The top plate 1 and the bottom plate 2 together form a furnace cavity 4.

[0024] The single plasma burner 3 includes a cathode nozzle 31 , a cathode pin 32 , an upper ceramic tube 33 , a lower ceramic tube 34 and an anode pin 35 .

[0025] like Figure 3 to Figure 6 As shown, in the embodiment of the present invention, a plurality of convex ribs 321 are arranged along the circumferential direction on the side of the cathode pintle 32, and the plurality of convex ribs 321 are in contact with the inner circumferential wall of the upper end of the cathode nozzle 31. Through such contact and cooperation, the cathode pintle 32 is mechanically limited and fixed, ensuring that the cathode pintle 32 maintains an accurate position during the operation of the device. An acceleration channel 5 is formed between any two adjacent convex ribs 321 and the inner wall of the cathode nozzle 31.

[0026] In the embodiment of the present invention, an electrode hole is provided at the center of the bottom of the upper ceramic tube 33, and the lower end of the anode needle 35 is installed between the bottom of the upper ceramic tube 33 and the bottom of the lower ceramic tube 34, and the upper end of the anode needle 35 extends upward through the electrode hole. A preset distance is maintained between the tip of the head of the anode needle 35 and the cathode pintle 32 above it, so that after a voltage is applied to the anode needle 35, a strong electric field region is formed between the tip of the head of the anode needle 35 and the cathode pintle 32, so that the working gas therebetween is ionized, thereby generating an arc.

[0027] In the embodiment of the present invention, the arc generated between the anode needle 35 and the cathode needle bolt 32 is maintained in the axial space, and the airflow enters the acceleration channel 5 from the air duct 6 formed between the side of the anode needle 35 and the upper ceramic tube 33. This spatial layout makes the airflow path and the space where the arc is located independent of each other, thereby avoiding direct interference or influence of the airflow on the arc in this area.

[0028] The high temperature of the arc further maintains and promotes the ionization of the gas passing near the anode needle 35, forming a continuous plasma generation. When the plasma enters the acceleration channel 5 from the air duct 6, the gas flow rate increases due to the reduction of the cross-sectional area of ​​the acceleration channel 5. This allows the plasma to be accelerated after entering the acceleration channel 5, forming a high-speed plasma jet.

[0029] In the embodiment of the present invention, the head of the cathode pintle 32 extends out of the nozzle of the cathode nozzle 31, and the outer diameter of the head of the cathode pintle 32 is greater than the inner diameter of the nozzle of the cathode nozzle 31. The present invention blocks the axial movement of the plasma jet by the head of the cathode pintle 32, so that the plasma jet hits the head of the cathode pintle 32 and then ejects radially, so that its energy is dispersed in a larger range, reducing the concentration and energy density of the jet, avoiding the occurrence of local overheating, and the radially ejected plasma jet can more widely cover the surface of the heated food or pot, so that the heat can be more evenly transferred to various parts of the heated object.

[0030] like Figure 5 As shown, in the embodiment of the present invention, a plurality of air inlet holes 332 are radially opened on the wall of the upper ceramic tube 33, so that the inner cavity of the plasma burner 3 is connected with the furnace cavity 4. When the gas radially enters the interior of the upper ceramic tube 33, the gas directly impacts the upper end of the anode needle 35, and the impact of the gas can take away part of the heat generated at the upper end of the anode needle 35, playing a certain cooling role. This helps to stabilize the temperature of the anode needle 35 and avoid damage to the anode needle 35 due to excessive temperature.

[0031] The setting direction of the air inlet hole 332 is consistent with the radial direction of the upper ceramic tube 33, and automated production can be achieved in the production process: when the machine is pre-embedding the needle, the needle can be accurately pre-embedded into the ceramic embryo through precise positioning and control, preparing for the subsequent formation of the air inlet hole 332; when the ceramic embryo is air-dried and shaped, the machine needs to pull out the pre-embedded needle to form the air inlet hole 332.

[0032] Since the air inlet holes 332 are radially arranged, the position and direction of the needle in the embryo are relatively fixed, and the machine can more easily find the position of the needle and apply appropriate force to pull it out. The machine pre-embeds and pulls the needle without manual intervention, which greatly reduces the time and workload of manual operation. Automated production reduces dependence on manual labor and reduces labor costs. At the same time, the machine pre-embeds and pulls the needle to ensure the position and size accuracy of the air inlet holes 332, so that each air inlet hole 332 has a high degree of consistency.

[0033] In the embodiment of the present invention, the setting of the limit ring provides a radial positioning structure for the upper ceramic tube 33. The limit ring is installed between the tube wall of the lower ceramic tube 34 and the lower end of the anode needle 35, which can limit the radial movement of the upper ceramic tube 33. At the same time, the outer diameter of the lower end of the anode needle 35 is larger than the outer diameter of the upper end, and the bottom of the upper ceramic tube 33 is located at the edge of the electrode hole, which limits the upward movement of the lower end of the anode needle 35. These structural designs ensure the accurate position of each component of the plasma burner 3 in the device.

[0034] In the embodiment of the present invention, the cathode nozzle 31 is in the shape of a cone with a gradually contracting upper end, so that the upper end of the cathode nozzle 31 limits the excessive upward movement of the cathode pintle 32, and the cross section of the acceleration channel 5 contracts from bottom to top, thereby realizing that the plasma entering the acceleration channel 5 forms a high-speed plasma jet.

[0035] In another embodiment of the present invention, the bottom of the cathode nozzle 31 is installed on the top plate 1, and an interference fit connection installation method is adopted. A corresponding through hole is opened on the top plate 1, and the bottom of the cathode nozzle 31 is processed to be slightly larger than the through hole. The bottom of the cathode nozzle 31 is forcibly inserted into the through hole by external force, and the friction and extrusion force generated by the elastic deformation of the material are used to achieve a tight connection. This method is more stable after installation, and the difficulty of installation and disassembly is relatively small.

[0036] In another embodiment of the present invention, the present invention further proposes that the bottom plate 2 is abutted against the bottom of the lower ceramic tube 34, and the cathode nozzle 31, the upper ceramic tube 33, and the lower ceramic tube 34 are connected in sequence, and the connection method is a sleeve connection. Specifically, a sleeve 313 is set at the bottom end of the cathode nozzle 31, and the top end of the upper ceramic tube 33 is inserted into the corresponding sleeve 313 respectively. The tension generated when the bottom plate 2 and the top plate 1 are fastened by bolts causes the cathode nozzle 31, the upper ceramic tube 33, and the lower ceramic tube 34 to be subjected to axial pressure, thereby achieving fastening.

[0037] This ferrule connection method generates uniform pressure at the connection between the cathode nozzle 31, the upper ceramic tube 33, and the lower ceramic tube 34, achieving the effect of sealing and tightening. In the ferrule connection method, the upper ceramic tube 33 only needs to be inserted into the corresponding ferrule 313, and then the bolts are tightened to complete the connection, which greatly improves the installation efficiency; in the ferrule connection method, the connection of each component is tightly fitted after being compressed and deformed, which can effectively prevent the leakage of the gas medium and meet certain sealing requirements; in the ferrule connection method, the connection part can vibrate to a certain extent, reducing the possibility of loose connection or displacement caused by vibration, and improving the stability and reliability of the entire system.

[0038] In another embodiment of the present invention, a connecting pipe 341 is further provided below the bottom of the lower ceramic tube 34. The connecting pipe 341 extends downward through the bottom plate 2. Specifically, a corresponding mounting hole is opened on the bottom plate 2 and connected by a clearance fit. More specifically, a certain gap is left between the connecting pipe 341 and the mounting hole for easy installation and disassembly. The bottom plate 2 is abutted against the bottom of the lower ceramic tube 34. The biting force of the bolts on the bottom plate 2 and the top plate 1 makes the bottom plate 2 and the bottom of the lower ceramic tube 34 nearly sealed.

[0039] In the assembly process of the present invention, only the bottom plate 2 and the top plate 1 are connected and fixed by bolts, and the plasma burner 3 is pressed and fixed by the tension generated between the bottom plate 2 and the top plate 1. The whole installation process enhances the stability of the overall structure of the burner head of the present invention, and at the same time achieves a better sealing effect, and the whole structure can withstand external vibration or impact during subsequent use and transportation.

[0040] The present invention also provides an electric flame stove, comprising the above-mentioned burner head with uniform heating.

[0041] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A furnace head with uniform heating, comprising a top plate, a bottom plate, and a plurality of plasma burners; the top plate and the bottom plate together form a furnace cavity, characterized in that: A single plasma burner comprises a cathode nozzle, a cathode pin, an upper ceramic tube, a lower ceramic tube and an anode needle, wherein a plurality of convex ribs are arranged on the side of the cathode pin along the circumferential direction, and the plurality of convex ribs are in contact with the inner circumferential wall of the upper end of the cathode nozzle, and an acceleration channel is formed between any two adjacent convex ribs and the inner wall of the cathode nozzle; The cathode needle plug head extends out of the cathode nozzle, and the outer diameter of the cathode needle plug head is greater than the inner diameter of the cathode nozzle; An electrode hole is provided at the center of the bottom of the upper ceramic tube, the lower end of the anode needle is installed between the bottom of the upper ceramic tube and the bottom of the lower ceramic tube, and the upper end of the anode needle extends upward through the electrode hole. A plurality of air inlet holes are radially opened on the wall of the upper ceramic tube. When the gas radially enters the interior of the upper ceramic tube, the gas directly impacts the upper end of the anode needle.

2. The uniformly heated furnace head according to claim 1, characterized in that: A limiting ring is also arranged below the bottom of the upper ceramic tube, and the limiting ring is located between the tube wall of the lower ceramic tube and the lower end of the anode needle.

3. The uniformly heated furnace head according to claim 1, characterized in that: The outer diameter of the lower end of the anode needle is greater than the outer diameter of the upper end thereof, so that the bottom of the upper ceramic tube is located at the edge of the electrode hole to limit the upward movement of the lower end of the anode needle.

4. The uniformly heated furnace head according to claim 1, characterized in that: The cathode nozzle is in the shape of a cone with a gradually contracting upper end, so that the upper end of the cathode nozzle limits the excessive upward movement of the cathode pintle.

5. The uniformly heated furnace head according to claim 1, characterized in that: A preset distance is left between the tip of the head of the anode needle and the cathode needle bolt, and an air duct is formed between the side surface of the anode needle and the upper ceramic tube.

6. The uniformly heated furnace head according to claim 1, characterized in that: The bottom of the cathode nozzle is installed on the top plate, and the cathode nozzle, the upper ceramic tube and the lower ceramic tube are connected in sequence.

7. The uniformly heated furnace head according to claim 1, characterized in that: The bottom plate is in contact with the bottom of the lower ceramic tube. A connecting pipe is also provided below the bottom of the lower ceramic tube. The connecting pipe passes through the bottom plate and extends downward.

8. The uniformly heated furnace head according to claim 1, characterized in that: The bottom plate is fixedly connected to the top plate by bolts.

9. An electric flame cooker, characterized in that: A uniformly heated burner comprising the burner head described in any one of claims 1 to 8.

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