Furnace end of plasma commercial stove

Abstract

The utility model discloses a furnace end of a plasma commercial stove. The furnace end comprises a hearth, a bottom plate, a plurality of negative electrodes arranged at the bottom of the hearth, a plurality of ceramic tubes corresponding to the negative electrodes, and a plurality of positive electrodes arranged in the ceramic tubes, the corresponding negative electrode and the ceramic tube are coaxial and are annular, and openings at two ends of the annular are communicated with each other; the positive electrode is cylindrical, and a conical arc striking needle is arranged at the circle center of the upper surface of the positive electrode; an embedding groove is formed in the lower end of the ceramic tube, the corresponding positive electrode is arranged in the embedding groove, and the inner wall of the upper end of the ceramic tube limits upward movement of the positive electrode. According to the utility model, materials and production processes for manufacturing the ceramic tube are saved, and the weight of the ceramic tube is reduced.

Description

Technical Field

[0001] The utility model specifically relates to a burner head of a plasma commercial stove. Background Art

[0002] In the field of modern commercial stoves, high-power and high-energy commercial stoves are usually used, and the most common one is the commercial gas stove. The commercial gas stove meets the rapid stir-frying needs of restaurants, hotels, banquets, and feasts by using "high firepower", and at the same time, the dishes stir-fried with "high firepower" have a good taste. However, due to frequent gas leakage and explosion accidents of gas stoves, high-power commercial induction cookers were born. The commercial induction cooker uses high-power current to heat the frying pan, replacing the gas stove to some extent. However, in actual use, the heat of the induction cooker is not as high as that of the gas stove with an open flame, and the taste of the dishes is not as good as that of stir-frying with an "open flame".

[0003] In view of the deficiencies of the above two types of stoves, researchers have developed a plasma commercial stove that can directly convert electrical energy into high-temperature and high-spectral arcs (electric flames) for heating without any fuel.

[0004] However, the plasma commercial stove belongs to an emerging technology. The high cost of equipment manufacturing and maintenance makes its price relatively high. R & D personnel in this field have made technical improvements. For example, the patent with the application number CN202311561553.X discloses a burner head structure of a commercial stove, including a furnace chamber, a burner head inner liner arranged below the furnace chamber, a plurality of flame spraying pipes arranged at the bottom of the burner head inner liner and used as a circuit return, an insulating bottom plate arranged below the burner head inner liner, and electrode needles; a connecting pipe with a hollow structure with upper and lower openings is arranged at the bottom of the cyclone. The cyclone is a cylindrical structure with a cavity, and a plurality of inclined grooves are arranged on the circumferential wall. The inclined grooves extend from the bottom to the top surface of the circumferential wall of the cyclone; the cyclone, the connecting pipe, and the air collecting box are an integrated ceramic finished product formed by one-time molding with a mold. This prior art simplifies the manufacturing process and reduces the labor cost by improving the structure of the insulating seat so that the insulating seat can be formed by one-time molding with a mold during the manufacturing process.

[0005] However, the bottom of the insulating seat is closed and provided with a connecting pipe for thread-fixing the electrode needle, which invisibly increases the insulating material required for manufacturing the insulating seat and also increases the production and manufacturing cost. Summary of the Utility Model

[0006] The utility model aims to provide a technical solution to solve the above problems in order to overcome the above situations.

[0007] A burner head of a plasma commercial stove includes a furnace chamber, a bottom plate, a plurality of negative electrodes arranged at the bottom of the furnace chamber, a plurality of ceramic tubes corresponding to the negative electrodes, and a plurality of positive electrodes arranged inside the ceramic tubes;

[0008] The corresponding negative electrode and the ceramic tube are both coaxial and annular with both ends open and communicating; the positive electrode is cylindrical, and an arc-igniting needle in the shape of a cone is arranged at the center of the upper surface of the positive electrode; an embedding groove is arranged at the lower end of the ceramic tube, and the corresponding positive electrode is arranged in the embedding groove, and the inner wall at the upper end of the ceramic tube restricts the upward movement of the positive electrode;

[0009] At least one air inlet groove is arranged at the upper end of the ceramic tube, and the air inlet groove extends upward to the top surface of the ceramic tube, so that the top surface of the ceramic tube is disconnected;

[0010] Preferably, the ceramic tube is installed between the negative electrode and the bottom plate, and the upper end of the ceramic tube is connected to the lower end of the negative electrode;

[0011] Preferably, the bottom plate is made of mica material with good insulation and high heat resistance;

[0012] Preferably, a circular intermediate ring is further arranged between the furnace chamber and the bottom plate, the circumferential bottom of the furnace chamber is connected to the top surface of the intermediate ring, and the bottom surface of the intermediate ring is connected to the circumference of the bottom plate;

[0013] Preferably, the intermediate ring and the furnace chamber and the bottom plate form a nearly closed space;

[0014] Preferably, an air inlet fan is further arranged on the bottom plate.

[0015] Preferably, the chamfer formed by the air inlet groove and the inner wall of the ceramic tube at the position of the air inlet groove is less than 45°;

[0016] Preferably, the thickness of the circumferential wall of the ceramic tube is between 0.8 and 1.2 mm.

[0017] Compared with the prior art, the utility model saves the materials and production processes for manufacturing the ceramic tube, and simultaneously reduces the weight of the ceramic tube.

[0018] The additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the ceramic tube.

[0021] Figure 2 It is the top view of the ceramic tube.

[0022] Figure 3 It is the cross-sectional view of the present utility model.

[0023] Figure 4 It is Figure 3 The enlarged view of circle A in Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, 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 utility model 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 utility model.

[0026] In addition, in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and may also be the communication inside two elements. It may 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 utility model can be understood according to specific situations.

[0027] In addition, the technical features involved in different embodiments of the present utility model described hereinafter can be combined with each other as long as they do not conflict with each other.

[0028] Please refer to Figures 1 to 4 , in the embodiment of the present utility model, a burner head of a plasma commercial stove includes a furnace chamber 1, a bottom plate 2, a plurality of negative electrodes 3 arranged at the bottom of the furnace chamber 1, a plurality of ceramic tubes 4 corresponding to the negative electrodes 3, and a plurality of positive electrodes 5 arranged inside the ceramic tubes 4;

[0029] In this embodiment, the corresponding negative electrode 3 and the ceramic tube 4 are both coaxial and annular with openings at both ends for communication. The positive electrode 5 is cylindrical, and an arc ignition needle 51 in the shape of a cone is provided at the center of the upper surface of the positive electrode 5. A groove 41 is provided at the lower end of the ceramic tube 4, and the groove 41 can accommodate the positive electrode 5. The corresponding positive electrode 5 is arranged in the groove 41. The cross-sectional area of the inner cavity at the upper end of the ceramic tube 4 is smaller than the cross-sectional area of the positive electrode 5, and the inner wall at the upper end of the ceramic tube 4 restricts the upward movement of the positive electrode 5. Therefore, the installation of the positive electrode 5 does not require threaded connection or other connection methods, and the installation process is simple.

[0030] In this embodiment, at least one air inlet groove 42 is provided at the upper end of the ceramic tube 4, and the air inlet groove 42 extends upward to the top surface of the ceramic tube 4, causing the top surface of the ceramic tube 4 to be disconnected. The design of the ceramic tube 4 enables the direct production of the blank using a mold during manufacturing, reducing other processes and improving efficiency.

[0031] In this embodiment, the bottom plate 2 is made of mica material with good insulation and high temperature resistance. The ceramic tube 4 is installed between the negative electrode 3 and the bottom plate 2. When a high voltage is applied to the positive electrode 5, the insulating bottom plate 2 avoids the risk of arc formation between the positive electrode 5 and the bottom plate 2. The upper end of the ceramic tube 4 is connected to the lower end of the negative electrode 3, and an arc effect is generated between the arc ignition needle 51 and the lower end of the negative electrode 3, thereby generating a high-temperature plasma from the gas.

[0032] In this embodiment, a circular intermediate ring 6 is further provided between the furnace chamber 1 and the bottom plate 2. The bottom circumference of the furnace chamber 1 is connected to the top surface of the intermediate ring 6, and the bottom surface of the intermediate ring 6 is connected to the circumference of the bottom plate 2. The intermediate ring 6 and the furnace chamber 1 and the bottom plate 2 form a nearly enclosed space. The bottom plate is further provided with an air inlet fan 7, and the air inlet fan 7 provides gas for the inner cavity of the intermediate ring 6. The moving gas is introduced into the inner cavity of the ceramic tube 4 from the air inlet groove 42 as the aerodynamic force for the arc ejection.

[0033] Figure 2 As shown, in one embodiment, the chamfer formed by the air inlet groove 42 and the inner wall of the ceramic tube 4 at the position of the air inlet groove 42 is less than 45°. In this embodiment, the air inlet groove 42 is inclined as much as possible so that the gas in motion forms a swirling air flow after being discharged from the air inlet groove 42.

[0034] In this embodiment, the thickness of the circumferential wall of the ceramic tube 4 is between 0.8 - 1.2 mm. Usually, the positive electrodes 5 of commercial stoves are very dense, and the distance between adjacent positive electrodes 5 is maintained at 20 mm or more. Therefore, the thickness of the lower end of the ceramic tube 4 can be set to 0.8 mm to meet the insulation effect between the positive electrodes 5. In order to achieve the gas vortex effect, the thickness of the upper end of the ceramic tube 4 is set to 1.2 mm. Compared with the prior art where the thickness of the insulating seat is too thick and the cost is high, the present utility model reduces the manufacturing cost and lightens the weight of the ceramic tube 4.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model.

Claims

1. A burner head for a plasma commercial stove, characterized in that: It includes a furnace, a bottom plate, a plurality of negative electrodes arranged at the bottom of the furnace, a plurality of ceramic tubes corresponding to the negative electrodes, and a plurality of positive electrodes arranged inside the ceramic tubes; The corresponding negative electrode and the ceramic tube are both coaxial and in the shape of a ring with openings at both ends communicating with each other; the positive electrode is cylindrical, and a conical arc-starting needle is arranged at the center of the upper surface of the positive electrode; an embedding groove is arranged at the lower end of the ceramic tube, and the corresponding positive electrode is arranged in the embedding groove, and the inner wall of the upper end of the ceramic tube limits the upward movement of the positive electrode; At least one air inlet groove is arranged at the upper end of the ceramic tube, and the air inlet groove extends upward to the top surface of the ceramic tube, so that the top surface of the ceramic tube is disconnected.

2. The burner head of the plasma commercial stove according to claim 1, characterized in that: The ceramic tube is installed between the negative electrode and the bottom plate, and the upper end of the ceramic tube is connected to the lower end of the negative electrode.

3. The burner head of the plasma commercial stove according to claim 2, characterized in that: The bottom plate is made of mica material with good insulation and high temperature resistance.

4. The burner head of the plasma commercial stove according to claim 1, characterized in that: An annular intermediate ring is also provided between the furnace and the bottom plate, the circumference of the furnace bottom is connected to the top surface of the intermediate ring, and the bottom surface of the intermediate ring is connected to the circumference of the bottom plate.

5. The burner head of the plasma commercial stove according to claim 4, characterized in that: The intermediate ring, the furnace chamber and the bottom plate form a nearly closed space.

6. The burner head of the plasma commercial stove according to claim 5, characterized in that: The bottom plate is also provided with an air intake fan.

7. The burner head of the plasma commercial stove according to claim 1, characterized in that: The chamfer formed by the air inlet groove and the inner wall of the ceramic tube where the air inlet groove is located is less than 45°.

8. The burner head of the plasma commercial stove according to claim 7, characterized in that: The thickness of the circumferential wall of the ceramic tube is between 0.8 and 1.2 mm.

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