CN112762485B

CN112762485B - Plasma kitchen with electrode installation composite layer

Info

Publication number: CN112762485B
Application number: CN202110127662.5A
Authority: CN
Inventors: 李峰
Original assignee: Zhejiang Banai Plasma Technology Co ltd
Current assignee: Zhejiang Banai Plasma Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2023-09-19
Anticipated expiration: 2041-01-29
Also published as: CN112762485A

Abstract

The invention discloses a plasma kitchen range with an electrode mounting composite layer, which comprises a base, a kitchen range arranged on the base and a power supply control circuit arranged on the base, wherein the kitchen range comprises a high-voltage package and a plurality of discharge electrodes, and a high-voltage circuit is arranged in the high-voltage package and is electrically connected with the power supply control circuit; the high-voltage package upper end cover is equipped with compound insulation structure layer, and this compound insulation structure layer includes from last to the protective layer that the laminating set up in proper order down, and first arc-resistant layer, high temperature resistant thermal insulation layer, second arc-resistant layer, the bottom of each discharge electrode wear to establish install in compound insulation structure layer and be connected with the high-voltage circuit electricity. The invention ensures that the kitchen range counter electrode mounting structure of the plasma kitchen has the protection function of preventing arc damage and has good heat insulation effect.

Description

Plasma kitchen with electrode installation composite layer

Technical Field

The invention relates to the technical field of stoves, in particular to a plasma stove with an electrode installation composite layer.

Background

Plasma (plasma) is also called plasma, and is an ionized gaseous substance composed of positive and negative ions generated after ionization of atoms and atomic groups of which partial electrons are deprived, macroscopic electrically neutral ionized gas with a dimension larger than debye length, and the movement of the macroscopic electrically neutral ionized gas is mainly governed by electromagnetic force and shows remarkable collective behavior. The plasma is a good conductor, and can be captured, moved and accelerated by means of a magnetic field which is skillfully designed. The development of plasma physics provides new techniques and processes for the further development of materials, energy, information, environmental space, spatial physics, geophysics, etc. science. The plasma is a fourth state of matter other than solids, liquids, and gases. A substance is composed of molecules, which are composed of atoms, which are composed of a positively charged nucleus and negatively charged electrons surrounding it. When heated to a sufficiently high temperature or other reasons, the outer electrons break away from the confinement of the nuclei into free electrons, just as students after class run on the playground to play at will. Electrons leave the nuclei, a process called "ionization". At this point, the material becomes a uniform mass of "paste" of positively charged nuclei and negatively charged electrons, and is therefore known as a plasma, in which the total amount of positive and negative charges is equal, and is thus approximately electrically neutral, and is therefore known as a plasma.

The plasma kitchen range is a novel kitchen range which utilizes the characteristic of plasma, uses high-voltage electric breakdown air to form thermal plasma, converts electric energy into heat energy, finally obtains thermal plasma beams with ideal length and function, and generates the thermal plasma beams with flame-like characteristics to heat a cooker for cooking.

In the prior art, an insulated electrode mounting plate is arranged above a cooking range, a discharge electrode is fixedly arranged on the electrode mounting plate, and the discharge electrode releases high voltage to break down air so as to form flame-shaped thermal plasma beams. Because high-voltage electricity is transmitted to the discharge electrode, corona discharge, creepage and other discharges are easy to generate, and arc damage is generated to the electrode mounting plate.

In the prior art, arc damage prevention of the electrode mounting plate is not protected, the electrode mounting plate is easy to damage, and the service life of a product is shortened.

While heat generated at the location of the discharge electrode is conducted downward to affect the internal circuit. The electrode mounting plate in the prior art is of a single-layer structure, and the heat insulation effect is poor.

Accordingly, there is a need in the art for improvement.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a plasma cooking stove with an electrode mounting composite layer, which aims to provide a cooking stove with a protection function against arc damage to an electrode mounting structure of the plasma cooking stove, and at the same time, has a good heat insulation effect.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the plasma kitchen with the electrode mounting composite layer comprises a base, a kitchen range arranged on the base and a power supply control circuit arranged on the base, wherein the kitchen range comprises a high-voltage package and a plurality of discharge electrodes, and the high-voltage package is internally provided with the high-voltage circuit which is electrically connected with the power supply control circuit;

the high-voltage package upper end cover is provided with a composite insulation structure layer, the composite insulation structure layer comprises a protection layer, a first arc-resistant layer, a high-temperature-resistant heat-insulating layer and a second arc-resistant layer, wherein the protection layer is sequentially attached from top to bottom, and the bottom of each discharge electrode is arranged on the composite insulation structure layer in a penetrating mode and is electrically connected with a high-voltage circuit.

Wherein the high-temperature-resistant heat-insulating layer is mica.

Wherein, the first arc-resistant layer and the second arc-resistant layer are made of teflon plastics.

Wherein the protective layer is microcrystalline glass.

The high-voltage package comprises an insulating support and a shielding shell, wherein the shielding shell is positioned at the lower end of the insulating support and connected with the insulating support, the high-voltage circuit is arranged in the shielding shell, and a lower end face sealing cover of the second arc-resistant layer is sealed on the upper end face of the insulating support to form good sealing.

The upper end face of the insulating support is provided with a concave sealing step in the circumferential direction, and the edges of the second arc-resistant layer and the high-temperature-resistant heat-insulating layer are lapped on the sealing step and sealed through sealing glue.

Wherein, a plurality of connecting columns are arranged on the insulating support in a penetrating way up and down and are used for connecting a discharge electrode and a high-voltage circuit;

the discharge electrode comprises an electrode connecting rod arranged at the bottom, and the electrode connecting rod penetrates through the composite insulating structure layer and is connected with the connecting column on the insulating support.

The electrode connecting rod comprises a head part at the upper end and a rod part at the lower end, wherein the head part penetrates through the protective layer and is abutted to form good sealing on the first arc-resistant layer, and the rod part penetrates through the first arc-resistant layer, the high-temperature-resistant heat-insulating layer and the second arc-resistant layer.

A gap is arranged between the outer wall of the head part of the electrode connecting rod and the protective layer;

and a gap is arranged between the outer wall of the rod part of the electrode connecting rod and the high-temperature-resistant heat-insulation insulating layer.

The junction of the head and the rod part of the electrode connecting rod is also provided with a centering positioning cone part, and the outer wall of the centering positioning cone part is abutted with the first arc-resistant layer and the high-temperature-resistant heat-insulating layer.

According to the plasma stove with the electrode installation composite layer, the single-layer electrode installation plate in the prior art is replaced by the composite insulation structure layer with the four-layer structure, the composite insulation structure layer sequentially comprises the protective layer, the first arc-resistant layer, the high-temperature-resistant heat insulation layer and the second arc-resistant layer, the protective layer plays a role in protecting an outer cover, sundries in the cooking process are prevented from falling into the stove, meanwhile, the heat insulation effect is achieved, the high-temperature-resistant heat insulation layer mainly insulates heat and prevents heat from being conducted downwards to affect an internal circuit, the first arc-resistant layer and the second arc-resistant layer are arranged on the upper surface and the lower surface of the high-temperature-resistant heat insulation layer, the arc-resistant damage protection effect is achieved on the high-temperature-resistant heat insulation layer, and the high-temperature-resistant heat insulation layer is prevented from being damaged by arcs. Due to the arrangement of the composite insulating structure layer, the invention not only can prevent arc damage, but also has good heat insulation effect, ensures the use stability of the product and prolongs the service life of the product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the structure of a first embodiment of a plasma oven with an electrode-mounting composite layer according to the present invention;

FIG. 2 is an exploded view of the structure of FIG. 1;

FIG. 3 is a schematic view of the cooking hob of FIG. 2;

FIG. 4 is an exploded view of the structure of FIG. 3;

FIG. 5 is an exploded schematic view of the composite insulating structure layer of the structure of FIG. 4;

FIG. 6 is a schematic cross-sectional view of a burner portion;

FIG. 7 is an enlarged schematic view of FIG. 6 at A;

FIG. 8 is an enlarged schematic view at B in FIG. 6;

FIG. 9 is an exploded view of the electrode connecting rod and connecting post;

FIG. 10 is a schematic view of a liftable ground probe of a plasma range of the present invention contacting a bottom surface of a pot.

Reference numerals illustrate:

100-plasma kitchen, 1-base, 2-kitchen range, 3-power supply control circuit, 4-high voltage package, 41-insulating support, 411-sealed step, 42-shielding shell, 43-spliced pole, 5-discharge electrode, 51-electrode connecting rod, 511-head, 512-pole portion, 513-centering positioning cone portion, 6-high voltage circuit, 7-composite insulation structure layer, 71-protective layer, 72-first arc-resistant layer, 73-high temperature resistant thermal insulation layer, 74-second arc-resistant layer, 8-pan support circle, 9-man-machine interaction panel, 10-plug, 11-radiator fan, 12-liftable ground probe, 121-extension end, 200-pan.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be either a fixed connection or a removable connection or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 8, the present invention provides a plasma oven 100 with an electrode-mounting composite layer, which includes a base 1, a cooking stove 2 disposed on the base 1, and a power control circuit 3 disposed on the base 1, wherein the cooking stove 2 includes a high-voltage package 4 and a plurality of discharge electrodes 5, and a high-voltage circuit 6 is disposed in the high-voltage package 4 and electrically connected to the power control circuit 3. The base 1 is used for installing a cooking range 2 and a power supply control circuit 3 and plays a supporting role. The base 1 can be formed by combining an upper shell and a lower shell which are made of plastic materials.

The power control circuit 3 is used for generating a driving power source required by the high-voltage package 4, and controlling the high-voltage circuit 6 in the high-voltage package 4 to be turned on and off to output power or stop power output. The driving power supply generated by the power supply control circuit 3 is a high-frequency or low-frequency low-voltage power supply, the high-voltage circuit 6 in the high-voltage bag 4 converts the high-voltage power input by the power supply control circuit 3 into high-voltage power and outputs the high-voltage power to the discharge electrode 5 for discharging, and the electric arc generated by the discharge electrode 5 ionizes air to generate high-temperature plasma to heat the bottom of the pot. In the embodiment of the present invention, the power control circuit 3 is connected to an external power supply through the plug 10.

The control implementation of the power supply control circuit 3 can be realized by adopting a singlechip and a combined program.

Preferably, the power supply control circuit 3 of the present invention further includes a leakage detection circuit. The leakage detection circuit detects whether or not there is leakage in the housing such as the base 1 and the cooking range 2, the cooker 200, and the like, and the power control circuit 3 controls the power of the plasma oven 100 to be turned off when the leakage occurs. Thereby ensuring the use safety.

The cooking range 2 of the invention also comprises a pot supporting ring 8 which is arranged above the high-pressure bag 4 and is exposed from the base 1 and is used for placing and supporting the pot 200.

The discharge electrode 5 of the plasma oven 100 of the present invention directly discharges the cooker, so the cooker 200 of the present invention needs to use a metal cooker.

In the embodiment of the invention, the base 1 is further provided with a man-machine interaction panel 9 for controlling the plasma oven 100. The human-machine interaction panel 9 may be provided as a key or a touch screen.

Preferably, the base 1 of the plasma oven 100 of the present invention may further be provided with a cooling fan 11, and an air inlet and an air outlet for the cooling fan 11 to inlet and outlet air. Therefore, heat generated by the high-pressure bag 4 can be quickly blown out of the base 1, and the heat dissipation effect of the whole machine is ensured.

As shown in fig. 5 and 8, the upper end cover of the high-voltage package 4 of the present invention is provided with a composite insulation structure layer 7, and the composite insulation structure layer 7 includes a protection layer 71, a first arc-resistant layer 72, a high-temperature-resistant heat-insulation layer 73, and a second arc-resistant layer 74, which are sequentially laminated from top to bottom, and the bottom of each discharge electrode 5 is installed on the composite insulation structure layer 7 in a penetrating manner and is electrically connected with the high-voltage circuit 6.

The protective layer 71 serves to prevent foreign matters such as water, oil, dishes, etc. from falling into the cooking range 2 during cooking, and is difficult to clean and thus affects use. While the protective layer 71 is located at the uppermost layer, which is directly exposed under the discharge electrode 5, the protective layer 71 may prevent a portion of heat from being transferred downward. Preferably, the protective layer 71 of the present invention is glass ceramics.

The glass ceramics has smooth surface, easy cleaning, high toughness, no fragility like common glass, wear resistance and scratch resistance, excellent insulating property, chemical corrosion resistance, good thermal stability and high use temperature. Therefore, the protective layer 71 of the present invention can protect the underlying structure by using glass ceramics.

Preferably, the edges of the protective layer 71 of the present invention are beyond the edges of the underlying first arc resistant layer 72, high temperature resistant insulating layer 73, and second arc resistant layer 74, such that the first arc resistant layer 72, high temperature resistant insulating layer 73, and second arc resistant layer 74 are fully covered and protected by the protective layer 71.

The high-temperature-resistant heat-insulating layer 73 is mainly used for heat insulation, and prevents heat generated at the discharge electrode 5 in the cooking range 2 from being conducted to the high-voltage circuit 6 in the high-voltage bag 4 to influence the performance of the high-voltage circuit 6. Preferably, the high temperature resistant insulating layer 73 of the present invention is mica. Since mica has a very good heat-insulating and heat-resistant effect due to a multi-layer laminated structure and can bear high temperature of about 1000 ℃, the high-temperature-resistant heat-insulating layer 73 of the invention can prevent most of downward heat conduction and protect circuits in the high-voltage package 4.

Since the plurality of discharge electrodes 5 are penetrated on the high temperature resistant insulating layer 73, if the discharge arc between the discharge electrodes 5 directly acts on the high temperature resistant insulating layer 73, the high temperature resistant insulating layer 73 is easily damaged by the arc to affect the service life.

The present invention is provided with a first arc-resistant layer 72 and a second arc-resistant layer 74 respectively bonded to the upper and lower surfaces of a high-temperature-resistant heat-insulating layer 73. Thereby preventing the high temperature resistant insulating layer 73 from being damaged by the arc, thus achieving both good heat insulation and prevention of arc damage.

The first and second arc-resistant layers 72, 74 are made of a special material so that they can withstand arc damage, and preferably the first and second arc-resistant layers 72, 74 of the present invention are all teflon plastics.

The teflon plastic has excellent insulativity, the thickness of 0.1mm can withstand high voltage of 1500V, the electrical insulation is not affected by temperature, the dielectric constant and the dielectric loss are very low in a wider frequency range, and the breakdown voltage, the volume resistivity and the arc resistance are high. Therefore, the high-temperature-resistant heat-insulating layer 73 can be effectively protected during the high-voltage discharge process of the plasma stove 100, and the high-temperature-resistant heat-insulating layer 73 is prevented from being damaged by an electric arc.

Therefore, the single-layer electrode mounting plate in the existing plasma stove 100 is replaced by the composite insulating structure layer with a four-layer structure, so that the heat insulation effect is greatly improved, the high-temperature-resistant heat insulation layer is prevented from being damaged by an electric arc, the product quality is improved, and the service life of the product is prolonged.

Specifically, as shown in fig. 6, the high-voltage package 4 of the plasma oven 200 of the present invention includes an insulating support 41 and a shielding shell 42 connected to the insulating support 41 at the lower end of the insulating support 41, the high-voltage circuit 6 is disposed in the shielding shell 42, and the lower end surface of the second arc-resistant layer 74 is sealed to the upper end surface of the insulating support 41. The insulating support 41 and the shielding shell 42 form a closed cavity for installing the high-voltage circuit 6, so that shielding protection is achieved, meanwhile, the lower end face of the second arc-resistant layer 74 is in sealing connection with the upper end face of the insulating support 41, sundries are prevented from entering the insulating support 41, and heat can be prevented from being transferred from the edge of the insulating support to the high-voltage package 4.

As shown in fig. 7, the upper end surface of the insulating support 41 of the present invention is provided with a concave sealing step 411 in the circumferential direction, and the edges of the second arc-resistant layer 74 and the high-temperature-resistant heat-insulating layer 73 are lapped on the sealing step 411 and sealed by sealant.

The concave sealing step 411 is L-shaped, encloses the edges of the second arc-resistant layer 74 and the high-temperature-resistant heat-insulating layer 73, and then is filled with sealant for sealing.

The protective layer 71 of the present invention is abutted against the upper end face of the concave seal step 411, and the abutment positions are also sealed and connected by filling a sealant.

As shown in fig. 8, the insulating holder 41 of the present invention is provided with a plurality of connection posts 43 penetrating up and down for connecting the discharge electrode 5 and the high-voltage circuit 6. The penetrating position of the connecting column 43 and the insulating support 41 can be sealed by adopting sealant or the connecting column 43 and the insulating support 41 can be directly molded into a whole to ensure the sealing effect.

The discharge electrode 5 comprises an electrode connecting rod 51 arranged at the bottom, and the electrode connecting rod 51 is installed on the composite insulating structural layer 7 in a penetrating way and is connected with the connecting column 43 on the insulating support 41. In this way, the electrode connecting rod 51 can press and fix the composite insulating structure layer 7 on the insulating support 41 to form a good seal, and simultaneously can conduct the electrical connection between the high-voltage circuit 6 in the high-voltage package 4 and the discharge electrode 5.

Specifically, as shown in fig. 9, the electrode connecting rod 51 of the discharge electrode 5 of the present invention includes a head portion 511 at the upper end and a rod portion 512 at the lower end, wherein the head portion 511 penetrates the protective layer 71 and abuts against the first arc-resistant layer 72 to form a good seal, and the rod portion 512 penetrates the first arc-resistant layer 72, the high-temperature-resistant heat-insulating layer 73 and the second arc-resistant layer 74. The head 511 of the electrode connecting rod 51 presses the first arc-resistant layer 72 and the high temperature-resistant heat-insulating layer 73 and the second arc-resistant layer 74 thereunder to form a good seal, and the rod portion 512 is connected to the connecting post 43 on the insulating support 41. Preferably, the lower end of the rod portion 512 is provided with external threads, and the upper end of the connecting column 43 is provided with a screw hole, and the two are in threaded connection, so that the electrode connecting rod 51 and the connecting column 43 can be conveniently and quickly installed and connected.

Preferably, a gap is provided between the outer wall of the head 511 of the electrode connecting rod 51 of the present invention and the protective layer 71; a gap is provided between the outer wall of the rod portion 512 of the electrode connecting rod 51 and the high temperature resistant heat insulating layer 73. Namely, the outer side wall of the electrode connecting rod 51 and the inner wall of the hole through which the composite insulating structure layer 7 passes are arranged in a non-contact manner. Thus, when the arc generated by the creepage on the electrode connecting rod 51 of the discharge electrode 5 is intended to move to the lower surface of the second arc-resistant layer 74 or to the upper surface of the protective layer 71, it is necessary to travel along the clearance surface between the electrode connecting rod 51 and the high temperature-resistant insulating layer 73, along the clearance surface between the electrode connecting rod 51 and the protective layer 71, which increases the creepage distance, so that the creepage phenomenon between the electrode connecting rod 51 and the lower surface of the second arc-resistant layer 74 and the upper surface of the protective layer 71 can be prevented to protect the entire composite insulating structure layer 7.

Further, as shown in fig. 8 and 9, a centering cone 513 is further provided at the connection between the head 511 and the stem 512 of the electrode connecting rod 51 of the present invention, and the outer wall of the centering cone 513 abuts against the first arc-resistant layer 72 and the high-temperature-resistant heat-insulating layer 73.

Thus, when the electrode connecting rod 51 is mounted, the hole is quickly aligned with the hole through which the high temperature resistant insulating layer 73 is inserted, and eccentricity is prevented. Because the outer wall of the electrode connecting rod 51 is possibly clung to the inner wall of the hole penetrating the high-temperature-resistant heat-insulating layer 73 when being eccentrically installed, the anti-creep effect is invalid after the electrode connecting rod is clung.

Preferably, as shown in fig. 10, the insulating support 41 of the plasma oven 100 of the present invention is further provided with a liftable grounding probe 12, and the liftable grounding probe 12 is provided with an elastically liftable protruding end 121 protruding upwards for elastically contacting with the bottom of the pot 200, and the protruding end 121 is electrically grounded.

When the cooker 200 is placed on the plasma kitchen range 100, the bottom surface of the cooker 200 is elastically contacted with the extending end 121 of the liftable grounding probe 12, so that the cooker 200 is well grounded, and the use safety is ensured.

According to the plasma stove 100 with the electrode mounting composite layer, a single-layer electrode mounting plate in the prior art is replaced by the composite insulating structure layer 7 with the four-layer structure, the composite insulating structure layer 7 sequentially comprises the protective layer 71, the first arc-resistant layer 72, the high-temperature-resistant heat insulation layer 73 and the second arc-resistant layer 74, the protective layer 71 plays a role in protecting an outer cover, impurities in a cooking process are prevented from falling into the stove 2, meanwhile, the heat-resistant heat insulation layer 73 plays a role in heat insulation, heat is prevented from being downwards conducted to affect an internal circuit, the first arc-resistant layer 72 and the second arc-resistant layer 74 are arranged on the upper surface and the lower surface of the high-temperature-resistant heat insulation layer 73, the arc damage prevention effect is achieved on the high-temperature-resistant heat insulation layer 73, and the high-temperature-resistant heat insulation layer 73 is prevented from being damaged by an arc. Due to the arrangement of the composite insulating structure layer 7, the invention not only can prevent arc damage, but also has good heat insulation effect, ensures the use stability of the product, and greatly prolongs the service life of the product.

The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims, rather, as the description of the invention covers all embodiments of the invention.

Claims

1. The plasma kitchen with the electrode mounting composite layer comprises a base, a kitchen range arranged on the base and a power supply control circuit arranged on the base, wherein the kitchen range comprises a high-voltage package and a plurality of discharge electrodes, and the high-voltage package is internally provided with the high-voltage circuit which is electrically connected with the power supply control circuit;

it is characterized in that the method comprises the steps of,

the high-voltage package upper end cover is equipped with compound insulation structure layer, and this compound insulation structure layer includes from last to the protective layer that the laminating set up in proper order down, and first arc-resistant layer, high temperature resistant thermal insulation layer, second arc-resistant layer, the bottom of each discharge electrode wear to establish install in compound insulation structure layer and be connected with the high-voltage circuit electricity.

2. The plasma cooking range having an electrode-mounting composite layer according to claim 1, wherein the high-temperature resistant heat-insulating layer is mica.

3. The plasma cooking range with electrode-mounting composite layer as set forth in claim 1, wherein said first arc-resistant layer and said second arc-resistant layer are both teflon plastics.

4. The plasma cooking range having an electrode-mounting composite layer according to claim 1, wherein the protective layer is glass ceramics.

5. The plasma cooker with the electrode mounting composite layer according to claim 1, wherein the high-voltage package comprises an insulating support and a shielding shell which is positioned at the lower end of the insulating support and connected with the insulating support, the high-voltage circuit is arranged in the shielding shell, and the lower end face of the second arc-resistant layer is sealed on the upper end face of the insulating support.

6. The plasma cooker with electrode mounting composite layer as set forth in claim 5, wherein said insulating support has a concave sealing step formed on the upper end surface thereof in the circumferential direction, and the edges of said second arc-resistant layer and said high temperature-resistant insulating layer are overlapped on the sealing step and sealed by a sealant.

7. The plasma cooker with the electrode mounting composite layer according to claim 5, wherein a plurality of connecting posts are arranged on the insulating support in a penetrating manner up and down and are used for connecting a discharge electrode and a high-voltage circuit;

8. The plasma cooking range with electrode-mounting composite layer according to claim 7, wherein the electrode connecting rod comprises a head portion at an upper end and a rod portion at a lower end, the head portion penetrates through the protective layer and abuts against the first arc-resistant layer to form a good seal, and the rod portion penetrates through the first arc-resistant layer, the high-temperature-resistant heat-insulating layer and the second arc-resistant layer.

9. The plasma oven with electrode-mounting composite layer according to claim 8, wherein a gap is provided between the outer wall of the head portion of the electrode connecting rod and the protective layer;

10. The plasma cooker with the electrode mounting composite layer according to claim 8, wherein a centering positioning cone part is further arranged at the joint of the head part and the rod part of the electrode connecting rod, and the outer wall of the centering positioning cone part is abutted with the first arc-resistant layer and the high-temperature-resistant heat-insulating layer to form good sealing.