Burner with uniform heating and electric flame stove

Abstract

The present invention discloses a furnace head with uniform heating, including a top plate, a bottom plate, and a plurality of plasma burners; the top plate and the bottom plate together form a furnace cavity. In the present invention, since the air inlet holes are radially arranged, the position and size accuracy of the air inlet holes can be ensured by using machine-embedded needles and needle pullers, and no manual intervention is required, thereby reducing labor costs, and the gas can directly impact the anode needle and take away part of the heat generated by the anode needle, thereby 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 the area; the present invention arranges the cathode needle plug so that the plasma jet hits the head of the cathode needle plug 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 achieving uniform heating of the cookware.

Description

Technical Field

[0001] The present invention relates to a burner head, and more particularly to an electric flame stove. Background Art

[0002] An electric flame stove is a new type of cooking device that uses electric flame technology to heat a cooking pot or food by means of high-temperature plasma.

[0003] For example, the patent with the publication (announcement) number: CN219624118U discloses a burner head of an electric flame stove, which includes: 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 in a conical shape, has a large radius of the air guide port and a small radius of the air outlet; this patent realizes the effective jet of plasma to the cooking pot, improving the thermal energy utilization rate of the electric flame stove. However, in specific experiments, this patent has the problem that the thermal energy of the firepower is too concentrated, making it easy to overcook the stir-fry pan.

[0004] The prior art also has the problem of cumbersome installation procedures. Whether it is threaded connection or welding, since there are hundreds of ion needle assemblies in the electric flame stove, a fixing method relying on tools is required to install the ion needle assemblies, increasing the labor cost.

[0005] During the production process of the electric flame stove, those skilled in the art also found a technical problem to be solved. Since the air inlet on the insulating seat (ceramic tube) is tangentially arranged, it is impossible to use a machine to pre-embed and pull out the hole needles during the production process of the ceramic blank, and manual intervention is required, resulting in low efficiency.

[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 be damaged.

[0007] The present invention makes improvements in view of the above deficiencies in the prior art. Summary of the Invention

[0008] The present invention aims to provide a technical solution that can solve the above problems in order to overcome the above situations.

[0009] A burner head with uniform heating includes a top plate, a bottom plate, and a plurality of plasma burners; the top plate and the bottom plate enclose a furnace cavity; a single plasma burner includes a cathode nozzle, a cathode pin bolt, an upper ceramic tube, a lower ceramic tube, and an anode needle. A plurality of ribbed strips are circumferentially arranged on the side surface of the cathode pin bolt, and all the ribbed strips are in contact with the inner peripheral wall of the upper end of the cathode nozzle. An acceleration channel is formed between any two adjacent ribbed strips and the inner wall of the cathode nozzle.

[0010] The head of the cathode needle plug extends outside the nozzle of the cathode nozzle, and the outer diameter of the head of the cathode needle plug is greater than the inner diameter of the nozzle of the cathode nozzle;

[0011] 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 formed in the wall of the upper ceramic tube. When the gas enters the inside of the upper ceramic tube radially, the gas directly impacts the upper end of the anode needle;

[0012] Preferably, a limiting ring is further provided below the bottom of the upper ceramic tube, and the limiting ring is located between the wall of the lower ceramic tube and the lower end of the anode needle;

[0013] Preferably, the outer diameter of the lower end of the anode needle is greater than the outer diameter of its upper end, 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;

[0014] Preferably, the cathode nozzle is in a conical shape with a gradually shrinking upper end, so that the upper end of the cathode nozzle restricts the excessive upward movement of the cathode needle plug;

[0015] Preferably, a preset distance is left between the tip of the head of the anode needle and the cathode needle plug, and an air duct is formed between the side of the anode needle and the upper ceramic tube;

[0016] 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;

[0017] Preferably, the bottom plate abuts against the bottom of the lower ceramic tube, and a connecting pipe is further provided below the bottom of the lower ceramic tube, and the connecting pipe extends downward through the bottom plate;

[0018] Preferably, the bottom plate is fixedly connected to the top plate by bolts;

[0019] An electric flame stove includes a burner head with uniform heating described in any one of the above.

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

[0021] Since the air inlet holes of the present invention are radially arranged, machine pre-embedded needles and needle extraction can be used to ensure the position and dimensional accuracy of the air inlet holes, and no manual intervention is required, reducing the labor cost;

[0022] The air inlet holes of the present invention are radially arranged, and the gas directly impacts the anode needle and takes away part of the heat generated by the anode needle, playing a certain cooling role on the anode needle;

[0023] The arc generated between the anode needle and the cathode needle plug of the present invention is maintained in the axial space, thus avoiding direct interference or influence of the air flow on the arc in this area;

[0024] The present invention provides a cathode pin bolt, which enables the plasma jet to radially eject after hitting the head of the cathode pin bolt, dispersing its energy over a larger range, reducing the concentration and energy density of the jet, avoiding the occurrence of local overheating, and achieving uniform heating of the cookware.

[0025] 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

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in 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.

[0027] Figure 1 is a three-dimensional structure diagram of the present invention.

[0028] Figure 2 is a cross-sectional structure diagram of the present invention.

[0029] Figure 3 is a front view of the plasma burner.

[0030] Figure 4 is Figure 3 a cross-sectional view taken along line A-A in

[0031] Figure 5 is Figure 3 a cross-sectional view taken along line B-B in

[0032] Figure 6 is a three-dimensional diagram of the cathode pin bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] 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.

[0035] 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 it 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 circumstances.

[0036] 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.

[0037] Please refer to Figures 1 to 2 , in an embodiment of the present invention, a burner 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 enclose a furnace cavity 4.

[0038] A single plasma burner 3 includes a cathode nozzle 31, a cathode pin bolt 32, an upper ceramic tube 33, a lower ceramic tube 34, and an anode pin 35.

[0039] As Figures 3 to 6 shown, in an embodiment of the present invention, a plurality of ribbed strips 321 are circumferentially arranged on the side of the cathode pin bolt 32, and the plurality of ribbed strips 321 are all in contact with the inner peripheral wall of the upper end of the cathode nozzle 31. Through this contact fit, a mechanical limit and fixation effect on the cathode pin bolt 32 is achieved, ensuring that the cathode pin bolt 32 maintains an accurate position during the operation of the device. An acceleration channel 5 is formed between any two adjacent ribbed strips 321 and the inner wall of the cathode nozzle 31.

[0040] In an embodiment of the present invention, an electrode hole is provided at the center position of the bottom of the upper ceramic tube 33. The lower end of the anode pin 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 pin 35 extends upward through the electrode hole. A preset distance is reserved between the tip of the head of the anode pin 35 and the cathode pin bolt 32 above it. After the anode pin 35 is applied with a voltage, a strong electric field region is formed between the tip of the head of the anode pin 35 and the cathode pin bolt 32, ionizing the working gas therebetween, thereby generating an arc.

[0041] In the embodiment of the present invention, the arc generated between the anode needle 35 and the cathode needle plug 32 is maintained in the axial space, and the air flow 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 air flow path independent of the space where the arc is located, thus avoiding direct interference or influence of the air flow on the arc in this area.

[0042] The high temperature of the arc further maintains and promotes the ionization of the gas passing near the anode needle 35, forming continuous plasma generation. When the plasma enters the acceleration channel 5 from the air duct 6, due to the smaller cross-sectional area of the acceleration channel 5, the gas flow rate will increase. This enables the plasma to be accelerated after entering the acceleration channel 5, forming a high-speed plasma jet.

[0043] In the embodiment of the present invention, the head of the cathode needle plug 32 extends outside the nozzle of the cathode nozzle 31, and the outer diameter of the head of the cathode needle plug 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 through the head of the cathode needle plug 32, causing the plasma jet to radially eject after hitting the head of the cathode needle plug 32, dispersing its energy over a larger range, reducing the concentration and energy density of the jet, and avoiding the occurrence of local overheating. The radially ejected plasma jet can more widely cover the surface of the food or cookware to be heated, enabling heat to be more evenly transferred to each part of the object to be heated.

[0044] As Figure 5 shown, in the embodiment of the present invention, a plurality of air inlet holes 332 are radially formed in the wall of the upper ceramic tube 33, connecting the inner cavity of the plasma burner 3 with the furnace cavity 4. When the gas radially enters the inside 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.

[0045] The arrangement direction of the air inlet holes 332 is consistent with the radial direction of the upper ceramic tube 33, and automated production can be achieved during the production process: when the machine pre-buries the needle, through precise positioning and control, the needle can be accurately pre-buried into the ceramic blank to prepare for the subsequent formation of the air inlet holes 332; when the ceramic blank is air-dried and shaped, the machine needs to pull out the pre-buried needle to form the air inlet holes 332.

[0046] Since the air inlet hole 332 is radially arranged, the position and direction of the needle in the embryo body are relatively fixed, and it is easier for the machine to find the position of the needle and apply appropriate force to pull it out. By using the machine to pre-embed and pull out the needle, without manual intervention, the time and workload of manual operation are greatly reduced. Automated production reduces the dependence on labor and lowers the labor cost. At the same time, the machine pre-embedding and pulling out of the needle can ensure the position and dimensional accuracy of the air inlet hole 332, making each air inlet hole 332 highly consistent.

[0047] In the embodiment of the present invention, the setting of the limiting ring provides a radial positioning structure for the upper ceramic tube 33. The limiting ring is installed between the wall of the lower ceramic tube 34 and the lower end of the anode needle 35, and 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 that of its 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 positions of the components of the plasma burner 3 in the device.

[0048] In the embodiment of the present invention, the cathode nozzle 31 is in a conical shape with a gradually shrinking upper end, which limits the excessive upward movement of the cathode needle plug 32 at the upper end of the cathode nozzle 31, and makes the cross-section of the acceleration channel 5 shrink from bottom to top, realizing the formation of a high-speed plasma jet of the plasma entering the acceleration channel 5.

[0049] In another embodiment of the present invention, the bottom of the cathode nozzle 31 is installed on the top plate 1 by an interference fit connection method. 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 size of the through hole, and it is forced to be inserted into the through hole by an external force, and the frictional force and extrusion force generated by the elastic deformation of the material are used to achieve a firm connection. This installation method is relatively stable after installation, and the installation and disassembly are less difficult.

[0050] In another embodiment of the present invention, the present invention also proposes that the bottom plate 2 abuts against the lower part of the bottom of the lower ceramic tube 34. 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 ferrule connection. Specifically, a ferrule 313 is provided at the bottom end of the cathode nozzle 31, and the top end of the upper ceramic tube 33 is respectively inserted into the corresponding ferrule 313. When the bottom plate 2 and the top plate 1 are fastened by bolts, the cathode nozzle 31, the upper ceramic tube 33, and the lower ceramic tube 34 are subjected to axial pressure, so as to achieve fastening.

[0051] This ferrule connection method generates uniform pressure at the connection points of the cathode nozzle 31, the upper ceramic tube 33, and the lower ceramic tube 34, achieving the functions of sealing and fastening. For the ferrule connection method, only need to insert the upper ceramic tube 33 into the corresponding ferrule 313, and then tighten the bolt to complete the connection, which greatly improves the installation efficiency; for the ferrule connection method, after each component is deformed under pressure, its connection points fit closely, which can effectively prevent the leakage of gas medium and meet certain sealing requirements; for the ferrule connection method, the connection part can vibrate to a certain extent, reducing the possibility of connection loosening or displacement caused by vibration, and improving the stability and reliability of the entire system.

[0052] 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, corresponding mounting holes are opened on the bottom plate 2 and connected by an interference fit method. More specifically, a certain gap is left between the connecting pipe 341 and the mounting holes for easy installation and disassembly. The bottom plate 2 abuts against the bottom of the lower ceramic tube 34. The biting force of the bolt 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.

[0053] During the assembly process of the present invention, only the bottom plate 2 and the top plate 1 are bolted and fixed. The plasma burner 3 is pressed and fixed by the tensile force generated between the bottom plate 2 and the top plate 1. The entire 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 entire structure can withstand external vibration or impact during subsequent use and transportation.

[0054] The present invention also proposes an electric flame stove, including the above-mentioned burner head with uniform heating.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned 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 embrace all changes within the meaning and scope of the equivalent elements of the claims 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, 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; 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.

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: 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.

6. 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.

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

8. An electric flame cooker, characterized in that: A uniformly heated burner comprising the burner head described in any one of claims 1 to 7.

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