Burner and electric fire stove

Abstract

The embodiment of the invention discloses a furnace end and an electric fire stove. The furnace end comprises a cover plate, a bottom plate, a furnace cavity defined by the cover plate and the bottom plate, a plurality of plasma generation assemblies penetrating through the furnace cavity, and a ventilation assembly capable of communicating the furnace cavity with the outside. The plasma generation assembly comprises a spray cover, an electrode ring, an electrode needle and a cyclone tube; the cyclone tube main body is a hollow prism, a plurality of air ducts are arranged in the cyclone tube main body, each air duct comprises an air inlet and an air outlet which are communicated with each other, the air inlets are positioned on the outer side wall of the prism, the air outlets are positioned on the inner side wall of the prism, and the furnace chamber is communicated with the air chamber through the air ducts; a main spraying hole is formed in the middle of the spraying cover, the main spraying hole longitudinally penetrates through the spraying cover and can communicate with the air cavity and the outside, a plurality of channels are further formed in the spraying cover around the main spraying hole, and the channels can communicate with the air cavity and the outside.

Description

Technical Field

[0001] This invention relates to the field of electric stove technology, and more particularly to a burner head and an electric stove. Background Technology

[0002] An electric stove is a type of cooker that uses high-voltage ionization of air to generate high-temperature plasma similar to a flame. (Publication number:) CN118189232A The patented burner and electric stove disclose a burner and electric stove, wherein the burner includes a furnace cavity top plate, a furnace cavity bottom shell, a ventilation component, a connecting ring, and several plasma generating components; the furnace cavity top plate and the furnace cavity bottom shell enclose a furnace cavity, and the furnace cavity is connected to the ventilation component; the plasma generating components include a nozzle, a plasma needle, and a cyclone tube, the cyclone tube includes a cyclone tube body and a connecting pipe, the connecting pipe is connected to the lower part of the cyclone tube body, the cyclone tube body has an electrode hole communicating with the connecting pipe, the plasma needle passes through the electrode hole and exits through the connecting pipe; the furnace cavity top plate is provided with several mounting holes, the nozzle is connected to the mounting holes, the cyclone tube body passes through the furnace cavity top plate and is connected inside the nozzle; the connecting pipe passes through the furnace cavity bottom shell, and the connecting ring is sleeved on the connecting pipe from below and abuts against the furnace cavity bottom shell.

[0003] The burner disclosed in the aforementioned patent generates plasma through a nozzle. However, the plasma is concentrated at a single point, resulting in uneven heating of the cookware during use. Prolonged heating of a specific area can also affect the lifespan of the cookware. Furthermore, since the nozzle is mounted on a cyclone tube, replacement and cleaning are inconvenient. Moreover, the cyclone tube is cylindrical, and when air blows against its sidewalls, the airflow easily follows the sidewalls, resulting in less air entering the cyclone tube and affecting the plasma's rotation effect. Summary of the Invention

[0004] In view of this, the present invention provides a burner and an electric stove to solve the above-mentioned problems in the prior art.

[0005] To achieve one or more of the above objectives or other objectives, the present invention provides a burner head for an electric stove, comprising a cover plate, a bottom plate, a furnace cavity formed by the cover plate and the bottom plate, a plurality of plasma generating components passing through the furnace cavity, and a ventilation component capable of connecting the furnace cavity to the outside. The plasma generating assembly includes a spray cap, an electrode ring, electrode needles, and a cyclone tube; The electrode ring is disposed inside the furnace cavity and located at the top of the cyclone tube. The cyclone tube includes a cyclone tube body and a connecting pipe. The connecting pipe is located in the middle of the cyclone tube body. After the electrode ring is assembled, its inner wall forms a wind cavity with the cyclone tube body. The bottom end of the electrode needle protrudes through the connecting pipe, and the top end of the electrode needle is located inside the wind cavity. The main body of the cyclone tube is a hollow prism, and the main body of the cyclone tube is provided with several air ducts. The air ducts include connected air inlets and air outlets. The air inlets are located on the outer side wall of the prism, and the air outlets are located on the inner side wall of the prism. The furnace cavity and the air cavity are connected through the air ducts. The spray cover is located outside the furnace cavity and is detachably connected to the top of the electrode ring. The spray cover has a main spray hole in the middle, which penetrates the spray cover longitudinally and can connect the air cavity to the outside. The spray cover also has several channels around the main spray hole, which can connect the air cavity to the outside.

[0006] Furthermore, the spray cap has an annular cross-section, and a plurality of channels are circumferentially distributed on the spray cap. Each channel includes a first opening and a second opening that are connected. The projection of the first opening onto the horizontal plane does not overlap with the projection of the second opening onto the horizontal plane.

[0007] Furthermore, the first opening portion is located on the bottom wall and inner side wall of the spray cap, and the second opening portion is located on the top wall and outer side wall of the spray cap.

[0008] Furthermore, the bottom end of the spray cap is provided with a hollow connecting ring, which is adapted to the top end of the electrode ring. After assembly, the connecting ring is located outside the furnace cavity.

[0009] Furthermore, the spray cap is made of insulating material, while the electrode ring and the cover plate are made of conductive material.

[0010] Furthermore, the main body of the cyclone tube is a regular heptagonal prism.

[0011] Furthermore, the angle between the inclination angle of any of the aforementioned air ducts and the side wall of the cyclone tube body it is located at is 45-60°.

[0012] Furthermore, the burner head also includes a grounding probe that penetrates the furnace cavity and has one end that can contact the cookware.

[0013] Furthermore, the furnace head also includes several U-shaped retaining rings, each of which corresponds to one of the electrode needles. The retaining rings are fitted to the bottom of the electrode needles and limit their position.

[0014] To achieve one or more of the above objectives or other objectives, the present invention provides an electric stove comprising the burner head described in any of the above descriptions.

[0015] Implementing the embodiments of the present invention will have the following beneficial effects: With the aforementioned burner head and electric stove, the spray cap, located on the outside of the furnace cavity, eliminates the need to open the burner head cover when cleaning or replacing it; it can be directly removed from the electrode ring, making it more convenient. Furthermore, the spray cap features a main nozzle and several channels. When cyclone-shaped plasma is generated, a portion is ejected upwards from the main nozzle in the center of the cap, while the rest is dispersed through the channels, scattering out of the cap. This results in more dispersed plasma contact with the cookware, ensuring even heating during cooking and extending the cookware's lifespan. Additionally, the cyclone tube's prismatic design allows for greater air reflection when air hits its sidewalls compared to curved surfaces. The reflected air more easily enters the air inlets on the sidewalls, increasing the efficiency of the rotating plasma. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] in: Figure 1 This is an exploded view of the furnace head structure in one embodiment of the present invention; Figure 2 This is a schematic diagram of the burner head structure in one embodiment of the present invention; Figure 3 This is a schematic diagram of the stove head structure in another embodiment of the present invention; Figure 4 for Figure 2 Another perspective; Figure 5 This is a schematic diagram of the spray cap structure in one embodiment of the present invention; Figure 6 for Figure 5 Another perspective; Figure 7 This is a schematic diagram of the structure of a cyclone tube in one embodiment of the present invention.

[0018] Figure label: 1. Cover plate; 2. Base plate; 21. Ventilation slot; 3. Spray cap; 31. Main spray nozzle; 32. First opening; 33. Second opening; 34. Connecting ring; 4. Electrode ring; 5. Electrode needle; 6. Cyclone tube; 61. Cyclone tube body; 62. Connecting pipe; 63. Air inlet; 64. Air outlet; 7. Grounding probe; 8. Clamping ring. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] Reference Figures 1 to 7 The present invention proposes a burner head for an electric stove, comprising a cover plate 1, a bottom plate 2, a furnace cavity formed by the cover plate 1 and the bottom plate 2, several sets of plasma generating components passing through the furnace cavity, and a ventilation component capable of connecting the furnace cavity with the outside. The plasma generating assembly includes a spray cap 3, an electrode ring 4, an electrode needle 5, and a cyclone tube 6; The electrode ring 4 is set inside the furnace cavity and located at the top of the cyclone tube 6. The cyclone tube 6 includes a cyclone tube body 61 and a connecting pipe 62. The connecting pipe 62 is located in the middle of the cyclone tube body 61. After the electrode ring 4 is assembled, its inner wall forms a wind cavity with the cyclone tube body 61. The bottom end of the electrode needle 5 passes through the connecting pipe 62, and the top end of the electrode needle 5 is located inside the wind cavity. The main body 61 of the cyclone tube is a hollow prism. Several air ducts are provided inside the main body 61 of the cyclone tube. The air ducts include a connected air inlet 63 and an air outlet 64. The air inlet 63 is located on the outer side wall of the prism, and the air outlet 64 is located on the inner side wall of the prism. The furnace cavity and the air cavity are connected through the air ducts. The spray cover 3 is located outside the furnace cavity and is detachably connected to the top of the electrode ring 4. The spray cover 3 has a main spray hole 31 in the middle. The main spray hole 31 penetrates the spray cover 3 longitudinally and can connect the ventilation cavity and the outside. The spray cover 3 also has several channels around the main spray hole 31. The channels can connect the ventilation cavity and the outside.

[0023] In this embodiment, the bottom plate 2 has a groove-shaped structure. The furnace cavity formed by the bottom plate 2 and the cover plate 1 is connected to the outside through a ventilation component. The ventilation component is a fan located in the middle of the lower end of the furnace cavity. The bottom plate 2 has a ventilation groove 21, and the fan is located in the ventilation groove 21, which can supply air into the furnace cavity. The gaps formed after the bottom plate 2 and the cover plate 1 are few. The air mainly flows into the cyclone pipe 6 from the air inlet 63 on the cyclone pipe body 61 located inside the furnace cavity. Other gaps in the furnace cavity can also be sealed to minimize air loss.

[0024] The bottom end of electrode needle 5 is connected to the power supply via a circuit board. When the electric stove is working, electrode needle 5 is at a high level, and electrode ring 4 is at a low level. The cyclone tube 6 connecting electrode needle 5 and electrode ring 4 is made of insulating material, such as ceramic or mica. This prevents short circuits between electrode needle 5 and electrode ring 4, allowing them to ionize the air between them and generate plasma when they are working.

[0025] Since the plasma is generated on the upper side of the cyclone tube 6, when the air flows out from the air outlet 64 on the inner wall of the cyclone tube 6, it has a certain angle. When the air converges and flows upward and rotates within the cyclone tube 6, it can drive the plasma generated between the electrode needle 5 and the electrode ring 4 to rotate upward and flow. The spray cover 3 is located at the upper end of the electrode ring 4, and the cross-sectional size of the main spray hole 31 in the middle of the spray cover 3 is equal to or slightly smaller than the cross-sectional size of the inner wall of the electrode ring 4. The plasma can continue to rise, enter the interior of the spray cover 3 through the main spray hole 31 or the first opening 32, and flow to the outside, heating the pot placed above the burner.

[0026] In one embodiment, refer to Figure 5 and Figure 6The spray cap 3 has an annular cross-section, with several channels circumferentially distributed on it. Each channel includes a first opening 32 and a second opening 33 that are connected. The projections of the first opening 32 and the second opening 33 onto the horizontal plane do not overlap. Preferably, the first opening 32 is partially located on the bottom and inner walls of the spray cap 3, and the second opening 33 is partially located on the top and outer walls of the spray cap 3. It is understood that in different embodiments, the first opening 32 can be entirely located on the bottom wall of the spray cap 3. In this case, the inner wall of the electrode ring 4 should have space left at the corresponding position, for example, by setting the cross-section of the inner wall of the electrode ring 4 to be larger than the cross-section of the main nozzle 31, so that plasma can enter the channel from inside the electrode ring 4 through the first opening 32. Similarly, the second opening 33 can also be entirely located on the top wall of the spray cap 3 or entirely located on the outer wall of the spray cap 3. The relative positions of the first opening 32 and the second opening 33 determine the angle and dispersion of the ejected plasma. The normals of the channels can all be located on the vertical plane, or they can have a certain angular deviation from the vertical plane. Preferably, the ratio of the cross-sectional diameter of the main nozzle 31 to the cross-sectional diameter of the outer wall of the electrode ring 4 is between 0.3 and 0.75, and can be set to 1 / 3, to avoid affecting the plasma dispersion effect due to too much plasma entering the main nozzle 31. The first opening 32 and the second opening 33 are both set to 8-16, and can be set to 10 or 12, distributed circumferentially and equidistantly on the spray cover 3. Half of the first opening 32 is located on the bottom wall of the spray cover 3, and the other half is located on the inner wall of the spray cover 3. Half of the second opening 33 is located on the top wall of the spray cover 3, and the other half is located on the outer wall of the spray cover 3. The normal of each channel is located on a vertical plane, with an angle of 30-60° with the horizontal plane, such as 45°. Since the plasma has a certain inclination before entering the spray cover 3, it is easier for it to enter the spray cover 3 through the first opening 32 at the aforementioned angle, resulting in better dispersion. The normal of the channel can also be set to an arc shape, so that the plasma can rotate under the pot after it is ejected from the spray cover 3, making the heating more uniform and the heating area of ​​the pot larger.

[0027] In one embodiment, the bottom end of the spray cap 3 is provided with a hollow connecting ring 34, which is adapted to the top end of the electrode ring 4. After assembly, the connecting ring 34 is located outside the furnace cavity. Specifically, when assembling the furnace head, the electrode needle 5 includes an electrode rod and a top electrode head. The electrode rod is inserted into the hollow connecting tube 62 provided in the middle of the cyclone pipe 6, and the electrode head is located above the connecting tube 62. After the electrode needle 5 is assembled with the cyclone pipe 6, the electrode needle 5 is limited by a U-shaped retaining ring 8. The retaining ring 8 is assembled below the connecting ring 34, and the electrode needle 5 passes through the limiting groove on the retaining ring 8, causing the retaining ring 8 to undergo a certain elastic deformation. After the electrode needle 5 abuts against the retaining ring 8, its position is fixed. In addition, the electrode ring 4 is located at the upper end of the cyclone pipe 6, and the two can be connected by threads. (Refer to...) Figure 3The burner head cover plate 1 has several receiving holes. The upper end of the electrode ring 4 passes through these receiving holes. Since the electrode ring 4 and the cover plate 1 are in contact through these receiving holes, and both the electrode ring 4 and the cover plate 1 are made of conductive materials, they can conduct electricity. The spray cap 3 is made of an insulating and high-temperature resistant material, such as ceramic or mica. The spray cap 3 is located above the cover plate 1, covering the electrode ring 4. The connecting ring 34 can be threadedly connected to the top of the electrode ring 4. Because the spray cap 3 is very close to the cookware, it is more easily soiled and damaged. When disassembly is required, the threads can be unscrewed to avoid opening the entire cover plate 1. Each spray cap 3 can be disassembled and assembled individually. In different embodiments, the connecting ring 34 can also be located only outside the electrode ring 4. The electrode ring 4 only limits the position of the spray cap 3, and the spray cap 3 can rotate, making disassembly and assembly more convenient.

[0028] In one embodiment, refer to Figure 7 The cyclone tube body 61 is a regular heptagonal prism. After the power is turned on, air enters the furnace chamber. The air inlet 63 is located on the outer wall of the cyclone tube body 61. Taking any outer wall as an example, part of the air can directly enter the cyclone tube 6 through the air inlet 63, while the other part of the air will hit the outer wall. Since the outer wall is a plane, the air will be reflected by the outer wall as a reflective surface. Since the normal of the reflection is perpendicular to the reflective surface, the air is still located on one side of the outer wall after reflection. After one or more reflections, it is easier to enter the cyclone tube 6 again through the air inlet 63, which can ensure that most of the air enters the cyclone tube 6, improving the efficiency of blowing plasma. This avoids the situation where the outer wall is curved, resulting in a larger incident angle and the air being more easily reflected to a position farther away from the air inlet 63.

[0029] Understandably, the cyclone tube body 61 can also be a square prism, pentagonal prism, or octagonal prism. The closer the prism is to a cylinder, the easier it is for air to escape. The fewer the number of edges of the prism, the fewer the number of air ducts, resulting in lower efficiency of air entering the cyclone tube 6. Preferably, setting the cyclone tube body 61 as a regular heptagonal prism allows air to enter the cyclone tube 6 evenly.

[0030] In this embodiment, the inner wall of the cyclone tube body 61 is cylindrical. In different embodiments, it can also be set as a prism adapted to the outer wall. The air inlet 63 can be circular or elliptical, and the air outlet 64 is teardrop-shaped. Each air duct has a certain inclination angle relative to the side wall of the cyclone tube body 61 it is located on, so that when the airflow exits the air duct, it has a certain slope on the horizontal plane. After multiple airflows converge, they can form a cyclone and drive the generated plasma to rotate and flow upward. Preferably, the position of the air outlet 64 can be higher than the air inlet 63 to facilitate the upward flow of air.

[0031] Furthermore, the angle formed by the inclination angle of any air duct and the plane containing the side wall of the cyclone tube body 61 is 45-60°. When this angle is close to 90 degrees, the wind blows almost vertically into the cyclone tube 6, making rotation difficult. When this angle is close to zero degrees, the wind blown into the cyclone tube 6 will quickly hit the inner wall of the cyclone tube 6, easily losing kinetic energy and making it difficult to converge with other winds. Therefore, this angle is preferably 45°. In one embodiment, the above angle can be consistent with the angle between the channel normal and the horizontal plane, so that the wind hits the electrode ring 4 or the inner wall of the spray cover 3 less during the process of driving the plasma to rotate upward and be ejected from the spray cover 3, thus reducing losses.

[0032] In this embodiment, the burner head also includes a grounding probe 7, which penetrates the burner cavity and has one end that can contact the cookware. The grounding probe 7 is connected to the top plate via threads. When the electric stove is working, the cookware may become statically charged. The grounding probe 7 can safely conduct the static electricity to the ground, preventing the accumulation of charge and potential safety hazards.

[0033] The present invention also proposes an electric stove, including the aforementioned burner head.

[0034] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A burner head for use in an electric stove, characterized in that, It includes a cover plate, a bottom plate, a furnace cavity formed by the cover plate and the bottom plate, several sets of plasma generating components passing through the furnace cavity, and a ventilation component that can connect the furnace cavity to the outside. The plasma generating assembly includes a spray cap, an electrode ring, electrode needles, and a cyclone tube; The electrode ring is disposed inside the furnace cavity and located at the top of the cyclone tube. The cyclone tube includes a cyclone tube body and a connecting pipe. The connecting pipe is located in the middle of the cyclone tube body. After the electrode ring is assembled, its inner wall forms a wind cavity with the cyclone tube body. The bottom end of the electrode needle protrudes through the connecting pipe, and the top end of the electrode needle is located inside the wind cavity. The main body of the cyclone tube is a hollow prism, and the main body of the cyclone tube is provided with several air ducts. The air ducts include connected air inlets and air outlets. The air inlets are located on the outer side wall of the prism, and the air outlets are located on the inner side wall of the prism. The furnace cavity and the air cavity are connected through the air ducts. The spray cover is located outside the furnace cavity and is detachably connected to the top of the electrode ring. The spray cover has a main spray hole in the middle, which penetrates the spray cover longitudinally and can connect the air cavity to the outside. The spray cover also has several channels around the main spray hole, which can connect the air cavity to the outside.

2. A burner head according to claim 1, characterized in that, The spray cap has an annular cross-section, and several channels are circumferentially distributed on the spray cap. Each channel includes a first opening and a second opening that are connected. The projection of the first opening onto the horizontal plane does not overlap with the projection of the second opening onto the horizontal plane.

3. A burner head according to claim 2, characterized in that, The first opening is located on the bottom wall and inner side wall of the spray cap, and the second opening is located on the top wall and outer side wall of the spray cap.

4. A burner head according to claim 1, characterized in that, The bottom of the spray cap is provided with a hollow connecting ring, which is adapted to the top of the electrode ring. After assembly, the connecting ring is located outside the furnace cavity.

5. A burner head according to claim 1, characterized in that, The spray cap is made of insulating material, while the electrode ring and the cover plate are made of conductive material.

6. A burner head according to claim 1, characterized in that, The main body of the cyclone tube is a regular heptagonal prism.

7. A burner head according to claim 6, characterized in that, The angle between the inclination angle of any of the aforementioned air ducts and the side wall of the cyclone tube body it is located at is 45-60°.

8. A burner head according to claim 1, characterized in that, The burner head also includes a grounding probe that penetrates the furnace cavity and has one end that can contact the cookware.

9. A burner head according to claim 1, characterized in that, The furnace head also includes several U-shaped retaining rings, each of which corresponds to one of the electrode needles. The retaining rings are fitted to the bottom of the electrode needles and limit their position.

10. An electric stove, characterized in that, Includes the burner head described in any one of claims 1-9 above.

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