CN219328123U - Microwave plasma cooking device - Google Patents

Abstract

The utility model provides a microwave plasma kitchen range device, which comprises a kitchen range panel and further comprises: the microwave plasma module comprises a microwave generator, a microwave resonant cavity and a discharge tube, wherein the microwave resonant cavity is fixedly arranged at the bottom of the cooking top plate, the microwave generator is arranged at the lower side of the microwave resonant cavity, the discharge tube is arranged at one end, far away from the microwave generator, of the microwave resonant cavity, and an excitation area is arranged in the discharge tube. And the power supply module is electrically connected with the microwave generator and used for controlling output power. And the air supply module is connected with the discharge tube and is used for supplying air flow into the discharge tube. The control module comprises an optical sensor, a thermal sensor, a relay, a buzzer and a fault indicator lamp and is used for realizing intelligent control and safety protection on the microwave plasma kitchen range device.

Description

Microwave plasma cooking device

technical field

The utility model relates to the technical field of microwave plasma, in particular to an electric fire cooker with overheating protection and uniform flame.

Background technique

The most commonly used household and commercial stoves on the market today are gas stoves. The fuel of the gas stove is combustible gas, and the energy released by the combustion of combustible gas is used to heat food. Combustible gas mainly includes natural gas, artificial gas, liquefied petroleum gas, etc.

Combustible gas has the disadvantage of being flammable and explosive. When the air supply of the gas stove is insufficient, incomplete combustion will occur and toxic gases such as carbon monoxide will be produced, which poses a great safety hazard to the users. Moreover, the gas may leak. If there is leakage, safety accidents such as violent explosions may occur. At the same time, during the normal combustion process of gas, carbon dioxide will be produced, which will increase carbon emissions.

In recent years, people have begun to study plasma cookers to try to replace gas cookers. Plasma cookers only need to consume electric energy to generate a lot of heat, and plasma cookers do not generate carbon dioxide during use, which greatly helps to alleviate my country's carbon emission problem.

The existing Chinese utility model patent application document with the application number CN201720983376.8 that can be referred to discloses a plasma cooker device. The type of plasma used is arc plasma, which requires electrodes to be excited, and the arc plasma will continue to ablate the electrodes during the excitation process, resulting in a short service life of the cooker. And because the electrodes of the arc plasma are exposed outside, there is also a great potential safety hazard.

In addition, the Chinese invention patent application document with the application number CN201810936519.9 discloses a microwave plasma stove device. Compared with arc plasma, microwave plasma does not need electrodes, and there is no problem of electrode ablation, and the microwave plasma cooktop requires a small volume, is convenient and quick to use, and can generate high temperature in a short time. However, this technology is still in its infancy, and its design is simple and crude. The plasma torch it produces is a single torch, and the high-temperature area is very concentrated and the heating is extremely uneven.

Utility model content

In order to solve the problems of concentrated high-temperature areas and uneven heating in the prior art, the utility model provides a uniform, intelligent, high-power, high-thermal-efficiency microwave plasma cooker device.

The utility model provides a microwave plasma cooker device, which includes a cooker panel, and further includes: a microwave plasma module, including a microwave generator, a microwave resonant cavity and a discharge tube, wherein the microwave resonant cavity is fixed on the cooker panel At the bottom, the microwave generator is installed on the lower side of the microwave resonant cavity, and the discharge tube is installed at the end of the microwave resonant cavity away from the microwave generator, and an excitation area is arranged in the discharge tube; the power module is electrically connected to the microwave generator for controlling the output Power; the gas supply module is connected to the discharge tube and is used to feed air into the discharge tube.

According to an embodiment of the present invention, there are multiple microwave plasma modules, and the power supply module includes: a power controller; a plurality of power supplies electrically connected to the power controller, each power supply is electrically connected to a microwave generator in a microwave plasma module connection, the power supply is used to supply power to the microwave plasma module, and the power controller is used to control the output of the power supply, so as to achieve the beneficial effects of practicality, convenience and high integration.

According to an embodiment of the present utility model, the air delivery module includes: an air pump; a plurality of parallel flowmeters, each flowmeter communicates with a discharge tube in a microwave plasma module, the air pump is used to generate gas, and the flowmeter is used to control the output of the air pump The gas flow rate achieves the beneficial effects of practicality, convenience and high integration.

According to the embodiment of the utility model, the gas in the air pump is air, nitrogen, argon or helium, which achieves the beneficial effects of practicality, convenience and low cost.

According to the embodiment of the utility model, the bottom of the discharge tube is provided with an air inlet, and the air flow controlled by the flow meter enters the discharge tube through the air inlet, so that the air can more easily contact with the microwave plasma to generate a torch.

According to the embodiment of the present invention, the thickness of the lower side of the microwave resonant cavity close to the microwave generator is thicker, and the thickness of the side of the microwave resonant cavity away from the microwave generator is thinner, so as to achieve the beneficial effect of improving the success rate of excitation.

According to the embodiment of the utility model, the discharge tubes in the plurality of microwave plasma modules are evenly distributed along the circumferential direction, so as to achieve the beneficial effect of uniform heating.

According to the embodiment of the utility model, the discharge tube is a multi-pass discharge tube, which can achieve the beneficial effect of uniform heating.

According to the embodiment of the utility model, the discharge tube is a quartz discharge tube or a ceramic discharge tube, so as to achieve the beneficial effects of being easy to transmit microwaves and resistant to high temperature.

According to an embodiment of the present invention, it also includes a control module, the control module includes: an optical sensor, arranged outside the discharge tube, for detecting whether the discharge tube forms a torch; a thermal sensor, arranged on a plurality of discharge tubes evenly distributed along the circumferential direction In the middle of the pot, it is used to detect the temperature of the bottom of the pot during normal operation, which has the beneficial effect of ensuring the safety of users during use.

According to the embodiment of the utility model, the control module further includes: a relay, which is arranged in the panel of the cooker, and is used to control the opening and closing of the microwave generator, so as to achieve the beneficial effect of ensuring the safety of the device.

According to the embodiment of the utility model, the control module also includes: a buzzer and a fault indicator light, both of which are arranged on the stove panel, the buzzer is used to send out an alarm sound, and the fault indicator light is used for fault display, so as to ensure that the user can The beneficial effect of safety in.

According to the embodiment of the utility model, a plurality of pot supports are placed on the stove panel, and windshields are arranged on the periphery of the plurality of pot supports, so as to reduce heat escape and improve thermal efficiency.

According to the embodiment of the utility model, a plurality of pan supports are evenly distributed along the circumferential direction, so as to support the cooker, facilitate temperature detection and provide heat.

According to the embodiment of the utility model, a rotary knob is also provided on the stove panel, and the rotary knob is connected to the power controller, and the output power of multiple power sources is controlled by controlling the power controller, so as to achieve the beneficial effects of simple operation and good experience for users .

According to the embodiment of the utility model, there is also a button switch on the cooker panel, which is used to control the opening and closing of the relay, so as to achieve the beneficial effect of ensuring the safety of the user during use.

Compared with the prior art, the microwave plasma cooker device provided by the utility model has at least the following beneficial effects:

1. Microwaves are generated by the microwave generator installed, and the microwaves pass through the microwave resonant cavity to enhance the electromagnetic field in the space and cause strong gas ionization at the position of the discharge tube to generate plasma and form a flame. When using it, you only need to press the button switch It can work normally, and the power of the power supply can be adjusted by turning the knob, and a complete set of intelligent control and safety modules are designed to ensure the safety of users during use. Using air as the working gas is more convenient and quick, and can realize simple and efficient The means to achieve high-efficiency heating, so the utility model is very suitable for use in the kitchen;

2. The microwave plasma cooker device can heat evenly, is practical and convenient, safe and reliable, has high power, high thermal efficiency, and high integration. The plasma heats up quickly and can reach a higher temperature in a short time.

Description of drawings

Through the following description of the embodiments of the utility model with reference to the accompanying drawings, the above-mentioned and other purposes, features and advantages of the utility model will be more clear, in the accompanying drawings:

Fig. 1 is the schematic diagram of microwave plasma module in the utility model embodiment;

Fig. 2 is a schematic diagram of the upper surface of the cooker in the embodiment of the utility model;

Fig. 3 is the schematic diagram of the input and output of the control module in the utility model embodiment;

Fig. 4 is the work flowchart in the utility model embodiment; And

Fig. 5 is a working flow diagram of the control module in the embodiment of the present invention.

[Description of Reference Signs]

1. Microwave plasma module; 2. Microwave source; 3. Cooktop panel; 11. Power controller; 12. Power supply; 13. Microwave generator; 14. Microwave resonant cavity; 141. Compression waveguide; 15. Excitation area; 16. Three-way discharge tube; 17. Air inlet; 18. Light sensor; 19. Flowmeter; 20. Air pump; 21. Pot support; 22. Windshield; 23. Thermal sensor; 24. Buzzer; 25. Button switch; 26, fault indicator light; 27, rotary knob.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The terminology used herein is only for describing specific embodiments, and is not intended to limit the present utility model. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, steps, operations and/or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

In this utility model, unless otherwise specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have a meaning consistent with the context of this specification, and not be interpreted in an idealized or overly rigid manner.

Fig. 1 is a schematic diagram of a microwave plasma module in an embodiment of the present invention. Fig. 2 is a schematic diagram of the upper surface of the cooker in the embodiment of the utility model.

Please refer to Fig. 1 and Fig. 2, a microwave plasma cooker device is provided in the embodiment of the utility model, including a microwave plasma module 1, wherein, the microwave plasma module 1 includes a microwave generator 13, a microwave resonant cavity 14 and Discharge tube 16. The cooktop panel 3 is arranged above the microwave plasma module 1 . The microwave resonant cavity 14 is fixedly arranged on the bottom of the cooker panel 3, the microwave generator 13 is installed on the lower side of the microwave resonant cavity 14, and the discharge tube 16 is installed on the end of the microwave resonant cavity 14 away from the microwave generator 13. The discharge tube 16 An excitation region 15 is arranged inside.

The power supply module is electrically connected to the microwave generator 13 and is used to control the power output of the microwave generator 13 .

The air supply module is connected to the discharge tube 16, and is used to feed air into the discharge tube 16 to form a microwave plasma torch with the microwave plasma.

In the embodiment of the present utility model, the number of microwave plasma modules 1 is multiple, and the specific number is not limited in the present utility model, and is subject to actual application.

Specifically, an ignition conductor is provided inside the discharge tube 16 for exciting microwaves to generate microwave plasma.

The microwave plasma cooktop device also includes a power supply module, the power supply module includes: a power controller 11, the power controller 11 simultaneously controls a plurality of power supplies 12, each power supply 12 is electrically connected to a microwave generator 13 in a microwave plasma module 1, The power supply 12 is used to supply power to the microwave plasma module 1 , and the power controller is used to control the power output of the power supply 12 . By adjusting the power controller 11 , the output power of multiple power supplies 12 can be controlled simultaneously.

Specifically, the power supply 12 is electrically connected with the microwave generator 13 to form a microwave source 2, and the microwave source 2 is used to generate microwaves.

In an embodiment of the present utility model, the microwave plasma cooker device also includes an air delivery module including: an air pump 20, and a flow meter 19 connected in parallel to control the gas flow of an air path respectively. Each flow meter 19 is connected to a microwave plasma module 1 The discharge tube 16 is connected, the gas pump 20 is used to generate gas, and the flow meter 19 is used to control the flow rate of the gas pump 20 output.

Specifically, taking three flowmeters 19 as an example, the air pump 20 is connected to the three flowmeters 19 through a one-to-three adapter, and the one-to-three adapter divides the gas output by the air pump 20 into three airflows, respectively enter the three flowmeters 19, and then the flowmeters 19 control the flow rate of the gas output, and then control the temperature distribution and shape characteristics of the plasma torch.

In an embodiment of the present invention, the gas in the air pump 20 is air, nitrogen, argon or helium and other harmless gases that can ignite the plasma torch.

In the embodiment of the present invention, an air inlet 17 is provided at the bottom of the discharge tube 16, and the air flow controlled by the flowmeter 19 enters the discharge tube 16 through the air inlet 17 to form a microwave plasma torch.

Specifically, a compression waveguide 141 is also provided in the microwave resonant cavity 14 for compressing microwaves.

In the embodiment of the present utility model, the thickness of the lower side of the microwave resonant cavity 14 close to the microwave generator 13 is relatively thick, and the thickness of the side of the microwave resonant cavity 14 away from the microwave generator 13 is relatively thin, and a compression waveguide 141 is formed in the middle. In the thin end of the microwave resonant cavity body 14, the amplitude of the microwave electric field is the largest.

In the embodiment of the present invention, the discharge tubes 16 in the plurality of microwave plasma modules 1 are uniformly distributed along the circumferential direction, so that uniform microwave plasma torches can be released to achieve uniform flames.

In the embodiment of the present utility model, the discharge tube 16 is a multi-way discharge tube, for example, a three-way quartz tube. The multi-way discharge tube can better enhance the uniformity of heating and separate the plasma torch.

In an embodiment of the present invention, the discharge tube 16 is a quartz discharge tube or a ceramic discharge tube, or other materials that are easily permeable to microwaves and resistant to high temperatures.

In the embodiment of the present invention, a control module is also included, and the control module includes: an optical sensor 18, which is arranged outside the discharge tube 16, and is used to detect whether the discharge tube 16 forms a torch. The heat sensor 23 is arranged in the middle of the plurality of discharge tubes 16 evenly distributed along the circumferential direction, and is used for detecting the bottom temperature of the pot during normal operation. The location and quantity of the sensors in the utility model are all examples, and other locations and quantities are within the protection scope of the utility model, and the actual application shall prevail.

In the embodiment of the present utility model, the control module further includes: a relay, which is arranged in the cooker panel 3 and is used to control the opening and closing of the microwave generator 13 .

In the embodiment of the present utility model, the control module also includes: a buzzer 24 and a fault indicator light 26, both of which are located on the cooker panel 3, the buzzer 24 is used to send out an alarm sound, and the fault indicator light 26 is used for fault display .

In the embodiment of the present utility model, a plurality of pot supports 21 are placed on the stove panel 3 , and a windshield 22 is arranged on the periphery of the plurality of pot supports 21 to reduce heat dissipation and improve thermal efficiency.

In the embodiment of the present utility model, a plurality of pot supports 21 are evenly distributed along the circumferential direction.

In the embodiment of the present utility model, a rotary knob 27 is also provided on the cooker panel 3 , and the rotary knob 27 is connected with the power controller 11 , and the output power of multiple power sources 12 is controlled by controlling the power controller 11 .

In the embodiment of the present utility model, a button switch 25 is also provided on the cooker panel 3 for controlling the opening and closing of the relay.

The utility model provides an embodiment by taking the number of microwave plasma modules 1 as three and the discharge tube 16 as a three-way discharge tube 16 as an example.

The microwave plasma cooker device is composed of a microwave plasma module 1, a power supply module, an air supply module and a control module. The microwave plasma torch is formed by entering the airflow, and the control module realizes the intelligent control and safety guarantee of the entire cooker device.

The power supply module includes, for example, three power supplies 12 and a power controller 11, and the three power supplies 12 are connected to a power controller 11 at the same time. At the same time, a power supply 12 and a microwave generator 13 can form a microwave source 2, and the microwave source 2 is used For generating microwaves, since the number of microwave plasma modules 1 is three, the number of microwave sources 2 is also three.

Based on the number of three microwave plasma modules 1, the number of three-way discharge tubes 16 is also three, and the three three-way discharge tubes 16 are evenly arranged along the circumferential direction, so that the torch is evenly distributed, and each microwave source 2 generates The microwave enters the microwave resonant cavity 14 and passes through the compression waveguide 141, and the spatial electromagnetic field in the three-way discharge tube 16 is enhanced, so strong gas ionization occurs in the excitation region 15 to generate microwave plasma. At the same time, the bottom of the three-way discharge tube 16 of the microwave plasma module 1 is provided with an air inlet 17, and each air inlet 17 is connected to a flow meter 19, and the three flow meters 19 are connected in parallel. Based on the one-to-three adapter, the air pump 20 outputs The gas is divided into three channels, and the gas flow rate is controlled by the flow meter 19 and input into the air inlet 17, combined with generating microwave plasma and blowing out the three-way discharge tube 16 to form a microwave plasma torch.

Based on the three-way discharge tubes 16 uniformly arranged in the circumferential direction, a thermal sensor 23 is installed in the middle of the three three-way discharge tubes 16. The thermal sensor 23 is, for example, an infrared temperature sensor, and the measuring probe is aligned directly above for monitoring The temperature at the bottom of the pot in normal work is used for overheating protection, and the periphery of each three-way discharge tube 16 is also placed with a light sensor 18 to monitor whether the plasma torch is igniting at all times.

Fig. 3 is a schematic diagram of the input and output of the control module in the embodiment of the utility model.

As shown in Figure 3, the control module of this embodiment also includes a control unit. The control unit can be, for example, a single-chip microcomputer for receiving the control signal of this embodiment. According to the single-chip microcomputer, the temperature detection and overheating protection of the device are realized, such as the detection of received light Signal, overheat protection signal and other signals, if the signal does not meet the preset value, the relay can be controlled to disconnect. By controlling the opening and closing of the relay, the microwave generation of the microwave generator 13 can be further controlled, and the on and off of the fault indicator light 26 and the opening and closing of the buzzer 24 can be controlled, thereby realizing temperature detection and overheating protection of the device.

Fig. 4 is the work flowchart in the embodiment of the utility model.

As shown in Figure 4, another embodiment of the present invention provides a work flow chart of a microwave plasma cooker device, including the following steps:

S1, turn on the air pump, feed air into the discharge tube, and adjust the air flow to a suitable value.

S2, turning on the cooling fan for cooling down the microwave generator.

S3, press the button switch, turn on the power supply, supply power to the microwave generator, and the microwave is excited by the ignition conductor to generate microwave plasma, the microwave plasma is divided into multiple torches through the three-way discharge tube, and the bottom of the pot is evenly heated; if the plasma is not If it can be excited normally, disconnect the relay, and then close it again after 1s. If it still fails to ignite the plasma, re-ignite it again. If the plasma still cannot be excited, disconnect the relay, start the buzzer, and light the fault indicator light.

S4, the power is adjusted by rotating the rotary knob on the cooker panel, and the gas flow is adjusted by adjusting the knob of the flow meter.

S5, the control module continuously monitors the operating state of the cooker, and if an abnormal situation occurs, the control module will alarm or repeat ignition according to the program.

Fig. 5 is a working flow diagram of the control module in the embodiment of the present invention.

As shown in Figure 5, in summary, the working principle of a microwave plasma cooker device provided by the utility model is as follows:

Press the button switch, that is, the relay is closed, wait for 1 second, and activate the microwave plasma torch. When the light detection module detects that the three-way discharge tube ignites the torch, the infrared temperature sensor continues to detect whether the temperature of the bottom of the pot exceeds the preset value. It means normal operation; when the infrared temperature sensor detects that the temperature of the bottom of the pot exceeds the preset value, the relay is disconnected to indicate a fault, the fault signal light is lit, and the buzzer is started; when the light detection module does not detect that the three-way discharge tube is activated When the torch is out, disconnect the relay, wait for 1 second and then re-ignite, and so forth. When the number of ignitions exceeds 3 times, it is judged that the plasma cannot be ignited, and the relay is disconnected to indicate a fault. The fault signal light is lit and the buzzer is activated.

It is understood that the specific order or hierarchy of steps in the processes disclosed herein is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present invention. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. The orientation or positional relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a reference to the utility model. limits. Throughout the drawings, the same elements are indicated by the same or similar reference numerals. Conventional structures or constructions will be omitted when it may cause confusion in the understanding of the present invention. And the shape, size, and positional relationship of each component in the figure do not reflect the actual size, proportion and actual positional relationship.

Similarly, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, in order to simplify the invention and to facilitate understanding of one or more aspects of the invention. Figure or its description. Description of the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or examples includes In at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (16)

1. A microwave plasma cooking appliance comprising a cooking top plate (3), characterized in that it further comprises:

the microwave plasma module (1) comprises a microwave generator (13), a microwave resonant cavity (14) and a discharge tube (16), wherein the microwave resonant cavity (14) is fixedly arranged at the bottom of the stove panel (3), the microwave generator (13) is arranged at the lower side of the microwave resonant cavity (14), the discharge tube (16) is arranged at one end, far away from the microwave generator (13), of the microwave resonant cavity (14), and an excitation area (15) is arranged in the discharge tube (16);

the power supply module is electrically connected with the microwave generator (13) and is used for controlling output power;

and the air supply module is connected with the discharge tube (16) and is used for supplying air flow into the discharge tube (16).

2. The microwave plasma cooking appliance arrangement according to claim 1, wherein the microwave plasma modules (1) are plural, the power supply module comprising:

a power controller (11);

a plurality of power sources (12) electrically connected with the power controllers (11), wherein each power source (12) is electrically connected with a microwave generator (13) in one microwave plasma module (1), the power sources (12) are used for supplying power to the microwave plasma module (1), and the power controllers are used for controlling the output of the power of the plurality of power sources (12).

3. The microwave plasma cooking device according to claim 2, wherein the air supply module includes:

an air pump (20);

a plurality of parallel flow meters (19), each flow meter (19) is communicated with a discharge tube (16) in one microwave plasma module (1), the air pump (20) is used for generating gas, and the flow meters (19) are used for controlling the flow rate of the gas output by the air pump (20).

4. A microwave plasma cooking device according to claim 3, characterized in that the gas in the air pump (20) is air, nitrogen, argon or helium.

5. A microwave plasma cooking device according to claim 3, characterized in that the bottom of the discharge tube (16) is provided with an air inlet (17), through which air inlet (17) the air flow controlled by the flow meter (19) enters the discharge tube (16).

6. The microwave plasma cooking device according to claim 1, characterized in that the lower side of the microwave cavity (14) close to the microwave generator (13) is thicker, and the side of the microwave cavity (14) remote from the microwave generator (13) is thinner.

7. The microwave plasma cooking appliance arrangement according to claim 2, characterized in that the discharge tubes (16) in a plurality of the microwave plasma modules (1) are evenly distributed along the circumferential direction.

8. The microwave plasma cooking device according to claim 7, characterized in that the discharge tube (16) is a multi-pass discharge tube.

9. The microwave plasma cooking device according to claim 8, characterized in that the discharge tube (16) is a quartz discharge tube or a ceramic discharge tube.

10. The microwave plasma cooking appliance assembly of claim 9, further comprising a control module, the control module comprising:

a photosensor (18) provided outside the discharge tube (16) for detecting whether the discharge tube (16) forms a torch;

and the thermal sensors (23) are arranged in the middle of the discharge tubes (16) which are uniformly distributed along the circumferential direction and are used for detecting the bottom temperature of the cooker during normal operation.

11. The microwave plasma cooking device of claim 10, wherein the control module further comprises:

and the relay is arranged in the cooking top plate (3) and is used for controlling the on and off of the microwave generator (13).

12. The microwave plasma cooking device of claim 11, wherein the control module further comprises:

the buzzer (24) and the fault indicator lamp (26) are arranged on the stove panel (3), the buzzer (24) is used for giving out alarm sound, and the fault indicator lamp (26) is used for fault display.

13. The microwave plasma cooking appliance arrangement according to claim 12, characterized in that a plurality of pot holders (21) are placed on the cooking top plate (3), the periphery of the plurality of pot holders (21) being provided with a windshield (22).

14. The microwave plasma cooking appliance arrangement according to claim 13, wherein the plurality of pot holders (21) are evenly distributed in the circumferential direction.

15. The microwave plasma cooking appliance arrangement according to claim 11, characterized in that the cooking top plate (3) is further provided with a rotation knob (27), the rotation knob (27) is connected with a power controller (11), and the power output by the power controllers (11) is controlled by controlling the power output by the power sources (12).

16. The microwave plasma cooking appliance arrangement according to claim 15, characterized in that the cooking top plate (3) is further provided with a push button switch (25) for controlling the opening and closing of the relay.

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