A burner head and an electric flame stove

Abstract

The present invention discloses a burner head and an electric flame stove, comprising: a burner head top shell, a burner head bottom plate, a plurality of anode needles, and a plurality of cathode nozzles corresponding to the anode needles. In the present invention, a plurality of ribs are longitudinally arranged along the inner wall of the metal outer tube of the cathode nozzle, and both the inlet end and the outlet end of the working medium flow channel between the ribs longitudinally extend upward along the inner wall of the metal outer tube. Therefore, the working medium gas convects relatively in the cathode nozzle, reducing the turbulence of the air flow in the cathode nozzle, the flow resistance and aerodynamic loss of the air flow, enabling the high-temperature gas to be ejected from the cathode nozzle with sufficient pressure; at the same time, the influence of the air flow on the stable discharge area is reduced, thus ensuring the stability and continuity of the arc. In the present invention, the metal outer tube is in an upward-expanded shape. When the high-temperature gas is ejected from the outlet ends of the plurality of working medium flow channels, it diffuses obliquely around under the guidance of the expansion structure, enabling the high-temperature gas to cover the bottom of the pot or the surface of the food in a large area and evenly, greatly improving the heating uniformity and efficiency.

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 kitchen appliance that uses advanced technology and structural design to efficiently convert electrical energy into thermal energy and quickly heat food.

[0003] For example, the utility model patent with patent number 202323150219.3 discloses an electric flame stove burner with a rotating plasma arc, a burner top plate, a burner bottom plate, multiple flame tubes arranged on the burner top plate and used for circuit return, multiple ceramic tubes corresponding to the flame tubes, and multiple electrode needles arranged on the ceramic tubes; the flame tubes are conical in shape, and the cross-sectional area gradually decreases upwards.

[0004] In the above-mentioned prior art patent, air enters the inner cavity of the ceramic tube to form a rotating airflow that drives the arc upward. The arc is mechanically compressed by the rotating airflow and the conical flamethrower tube to become a rotating and energy-concentrated plasma arc.

[0005] It can be seen that the airflow rotation in the existing technology increases the path of the airflow. At the same time, the airflow rotation causes friction between the upper and lower airflows, and between the airflow and the ceramic tube and the flamethrower, thereby resulting in greater flow resistance and high aerodynamic loss, affecting the injection effect of the high-temperature gas.

[0006] At the same time, arc discharge is generated between the electrode needle and the flamethrower in the existing technology, and the rotating motion of the airflow continuously cuts the path of the arc, causing the arc to easily deviate, extinguish, or flicker unstably, and it is impossible to continuously and stably ionize the gas to generate high-temperature plasma, affecting the heating effect.

[0007] The existing technology also has the defect that the mechanical compression of the cone-shaped flame-spraying tube causes the plasma flame energy to be concentratedly sprayed, which can easily cause local high temperature or low temperature areas at the bottom of the pot, resulting in uneven heating of food and affecting the cooking effect. Summary of the Invention

[0008] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0009] A burner head, comprising: a burner head top shell, a burner head bottom plate, a plurality of anode needles, and a plurality of cathode nozzles corresponding to the anode needles;

[0010] The cathode nozzle is composed of a metal outer tube and a metal arc-starting member mounted on the top of the metal outer tube. The inner wall of the metal outer tube is provided with a plurality of longitudinally extending ribs, which pass through the top and bottom ends of the metal outer tube, and a working medium flow channel is formed between two adjacent ribs.

[0011] The metal arc starter is in an inverted chamfered cone shape, and its annular side is closely attached to and electrically connected to a plurality of rib strips;

[0012] The anode needle includes a discharge head at the upper end and a connecting needle at the lower end. The discharge head is in a conical shape, and an annular stable current discharge area is formed between the discharge head and the metal arc starter;

[0013] Preferably, the metal outer tube is in a funnel-shaped upward expansion;

[0014] Preferably, a plurality of ceramic tubes corresponding to the anode needles are arranged on the furnace head bottom plate, and an insulating channel that is vertically interconnected is inside the ceramic tubes;

[0015] Preferably, a limiting ring is arranged in the middle section of the connecting needle, and the outer diameters of the discharge head and the limiting ring are both larger than the inner diameter of the ceramic tube;

[0016] Preferably, the connecting needle passes through the insulating channel inside the ceramic tube and is threadedly connected to the discharge head above, and the limiting ring abuts against the lower end surface of the ceramic tube;

[0017] Preferably, the furnace head top shell and the furnace head bottom plate enclose a furnace cavity, and a blower communicated with the furnace cavity is further installed outside the side wall of the furnace head top shell;

[0018] Preferably, the furnace head bottom plate and the plurality of ceramic tubes are an integrally formed ceramic structure;

[0019] Preferably, the furnace head top shell is provided with a plurality of threaded mounting holes corresponding to the cathode nozzles, and threads are preset on the outer side of the bottom of the metal outer tube;

[0020] Preferably, the lower end of the metal outer tube is sleeved outside the corresponding ceramic tube, so that the furnace cavity is communicated with a plurality of the working medium flow channels;

[0021] The present invention also provides an electric flame stove, and the electric flame stove includes the furnace head described in any one of the above.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] In the present invention, a plurality of rib strips are longitudinally arranged along the inner wall of the metal outer tube of the cathode nozzle, and both the inlet end and the outlet end of the working medium flow channel between the rib strips longitudinally extend upward along the inner wall of the metal outer tube. Therefore, the working medium gas convectively flows relatively in the cathode nozzle, reducing the turbulence of the air flow in the cathode nozzle, the flow resistance and the aerodynamic loss of the air flow, so that the high-temperature gas has sufficient pressure to be ejected from the cathode nozzle; at the same time, the influence of the air flow on the stable current discharge area is reduced, so the stability and continuity of the arc are ensured.

[0024] In the present invention, the metal outer tube is in an upwardly expanding shape. When high-temperature gas is ejected from the outlet ends of multiple working medium flow channels, it diffuses obliquely in all directions under the guidance of the expanding structure, enabling the high-temperature gas to cover the bottom of the pot or the surface of the food in a large area and uniformly, greatly improving the heating uniformity and efficiency.

[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 schematic structural diagram of the burner head of the present invention.

[0028] Figure 2 is Figure 1 an enlarged view of circle A in

[0029] Figure 3 is a three-dimensional structural diagram of the cathode nozzle of the present invention.

[0030] Figure 4 is an exploded view of the cathode nozzle of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0032] 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, and 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 of the present invention.

[0033] In addition, in the description of the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can also be the communication inside two components. 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.

[0034] 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.

[0035] Please refer to Figures 1 to 2 , in an embodiment of the present invention, a burner head includes: a burner head top shell 1, a burner head bottom plate 2, a plurality of anode needles 3, and a plurality of cathode nozzles 4 corresponding to the anode needles 3;

[0036] In an embodiment of the present invention, as Figures 2 to 4 shown, the cathode nozzle 4 is composed of a metal outer tube 41 and a metal arc ignition member 42 installed at the top of the metal outer tube 41. The anode needle 3 includes a discharge head 31 at the upper end and a connection needle 32 at the lower end. When a voltage is applied between the anode needle 3 and the cathode nozzle 4, an annular stable current discharge region 200 is formed between the discharge head 31 and the metal arc ignition member 42. The arc generated in this region is stable and uniform, continuously ionizing the gas to generate high-temperature plasma.

[0037] In an embodiment of the present invention, as Figures 2 to 4 shown, a plurality of longitudinally extending ribs 411 are provided on the inner wall of the metal outer tube 41. The ribs 411 penetrate through the top and bottom of the metal outer tube 41. A working medium flow channel 100 that communicates up and down is formed between two adjacent ribs 411. After the gas enters the inside of the cathode nozzle 4 from the inlet end of the working medium flow channel 100, the high-temperature plasma fully exchanges heat with the gas working medium to form high-temperature gas, and the high-temperature gas is ejected from the outlet end of the working medium flow channel 100 to heat the bottom of the pot or food above.

[0038] During the preparation of the cathode nozzle 4, the metal outer tube 4 and the metal arc ignition member 42 are respectively prepared in advance by two molds, and a plurality of longitudinally extending ribs 411 are reserved on the metal outer tube 41; the tip of the metal arc ignition member 42 is downward, and it is embedded in the top of the metal outer tube 41, so that the circumferential side wall of the metal arc ignition member 42 is closely attached to the plurality of ribs 411, and the two are fixed by machine welding.

[0039] In the embodiment of the present invention, since the ribs 411 are longitudinally arranged along the inner wall of the metal outer tube 41, and both the inlet end and the outlet end of the working medium flow channel 100 extend longitudinally upward along the inner wall of the metal outer tube 41, the working medium gas convects relatively in the cathode nozzle 4, reducing the turbulence of the gas flow in the cathode nozzle 4. At the same time, such a setting makes the gas flow along a nearly single direction, reducing the gas flow path, thereby reducing the flow resistance and aerodynamic loss of the gas flow, and enabling the high-temperature gas to have sufficient pressure to eject from the cathode nozzle 4.

[0040] In the embodiment of the present invention, the gas or high-temperature gas moves axially along the inner wall of the metal outer tube 41, reducing the influence of the gas flow on the stable discharge region 200, thus ensuring the stability and continuity of the arc. When the gas rises smoothly in the regular longitudinal flow channel, it will not destroy the annular stable discharge region 200 between the discharge head 31 and the metal arc starter 42 due to the disturbance caused by the turbulent gas flow, avoiding the phenomena of arc deviation, extinction or unstable flicker. The stable arc can continuously and efficiently ionize the gas to generate high-temperature plasma, thereby ensuring the stability and efficiency of the heat exchange process between the gas working medium and the plasma.

[0041] In the embodiment of the present invention, the conical discharge head 31 and the inverted frustum-shaped metal arc starter 42 are arranged with their tip structures facing each other, which can significantly enhance the electric field strength. According to the principle of tip discharge, the charge density is higher at the tip, making it easier to form a strong electric field between the discharge head 31 and the metal arc starter 42. After applying voltage, this strong electric field can trigger gas ionization more quickly and efficiently, greatly reducing the voltage required for arcing, improving the stability and reliability of arc generation, ensuring that a stable arc can be quickly formed at the start of the furnace head and enter the working state. At the same time, the structural cooperation of the cone and the inverted frustum makes the arc shape more stable.

[0042] In the embodiment of the present invention, during the process of the high-temperature gas flowing towards the top of the cathode nozzle 4, due to the upward expansion of the metal outer tube 41, when the high-temperature gas sprays out from the outlet ends of the plurality of working medium flow channels 100, it diffuses obliquely around under the guidance of the expansion structure. This diffusion method enables the high-temperature gas to cover the bottom of the pot or the food surface in a large area and evenly, avoiding the occurrence of local high-temperature or low-temperature regions, greatly improving the heating uniformity and efficiency, making the ingredients in the frying pan heated evenly, reducing the situation of partial burning and partial undercooking, and effectively improving the cooking effect.

[0043] In the next embodiment, as Figure 1 The furnace top shell 1 and the furnace bottom plate 2 enclose a furnace cavity 300, and a blower 5 installed outside the side wall of the furnace top shell 1 and communicating with the furnace cavity 300 is used to suck air into the furnace cavity 300 to increase the pressure in the furnace cavity 300. The way of connecting the furnace cavity 300 and the blower 5 can be to open a through hole on the side wall of the furnace top shell 1 for connection, or to connect through an air duct.

[0044] In the next embodiment, the ceramic tube 21 on the burner base plate 2 provides positioning and insulation for the anode needle 3. As Figures 1 to 2 shown, a limiting ring 321 is provided in the middle section of the connecting needle 32, and the outer diameters of the discharge head 31 and the limiting ring 321 are larger than the inner diameter of the ceramic tube 21. During installation, the connecting needle 32 is passed through the insulation channel inside the ceramic tube 21 and then threadedly connected to the discharge head 31 above until the limiting ring 321 abuts against the lower end face of the ceramic tube 21, so that the anode needle 3 is firmly installed.

[0045] In the next embodiment, the burner top shell 1 is provided with threaded mounting holes corresponding to the cathode nozzle 4, and threads are preset on the outer side of the bottom of the metal outer tube 41. During installation, the lower end of the metal outer tube 41 is sleeved outside the corresponding ceramic tube 21, and the cathode nozzle 4 is fixed to the burner top shell 1 by threaded connection. This installation method also enables the furnace cavity 300 to communicate with a plurality of working medium flow channels 100, providing a channel for gas to enter the working medium flow channels 100.

[0046] In the next embodiment, the burner base plate 2 and the plurality of ceramic tubes 21 of the present invention are an integrally formed ceramic structure. The integrally formed structure reduces the manufacturing process and assembly links, which not only reduces the errors and defect rates during manufacturing, but also improves the production efficiency and reduces the production cost.

[0047] The present invention also provides an electric flame stove, which includes the burner of any one of the above.

[0048] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. 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 include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A burner head, characterized in that, Comprising: The top shell of the furnace head, the bottom plate of the furnace head, a plurality of anode needles, and a plurality of cathode nozzles corresponding to the anode needles; The cathode nozzle is composed of a metal outer tube and a metal arc ignition member installed at the top of the metal outer tube. A plurality of longitudinally extending ribs are provided on the inner wall of the metal outer tube. The ribs penetrate through the top and bottom ends of the metal outer tube, and a working medium flow channel that communicates up and down is formed between two adjacent ribs; The metal arc ignition member is an inverted pyramid shape, and its annular side is closely attached to and electrically connected to a plurality of ribs; The anode needle includes a discharge head at the upper end and a connection needle at the lower end. The discharge head is conical, and an annular stable current discharge area is formed between the discharge head and the metal arc ignition member; The metal outer tube is in a funnel-shaped upward expansion; A plurality of ceramic tubes corresponding to the anode needles are provided on the bottom plate of the furnace head, and the inside of the ceramic tube is an insulating channel that communicates up and down; A limiting ring is provided in the middle section of the connection needle, and the outer diameters of the discharge head and the limiting ring are both larger than the inner diameter of the ceramic tube; The connection needle passes through the insulating channel inside the ceramic tube and is threadedly connected to the discharge head above, and the limiting ring abuts against the lower end surface of the ceramic tube.

2. The burner head according to claim 1, wherein The top shell of the furnace head and the bottom plate of the furnace head enclose a furnace cavity, and a blower communicated with the furnace cavity is further installed outside the side wall of the top shell of the furnace head.

3. The burner head according to claim 1, characterized in that, The bottom plate of the furnace head and the plurality of ceramic tubes are an integrally formed ceramic structure.

4. The burner head according to claim 1, wherein The top shell of the furnace head is provided with a plurality of threaded mounting holes corresponding to the cathode nozzles, and threads are preset on the outer side of the bottom of the metal outer tube.

5. The burner head according to claim 2, wherein The lower end of the metal outer tube is sleeved outside the corresponding ceramic tube, so that the furnace cavity is communicated with a plurality of the working medium flow channels.

6. An electric flame stove, characterized in that, The electric flame cooker includes the furnace head according to any one of claims 1 to 5.

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