A purification device for smokeless chafing dish table

Abstract

This utility model discloses a purification device for a smokeless hot pot table, including a tabletop, a housing, an oil fume separation device, a negative pressure generating device, a catalytic purification device, a heat dissipation device, and an intelligent control device. The tabletop is located on top of the housing, while the oil fume separation device, negative pressure generating device, and catalytic purification device are all located inside the housing. The heat dissipation device is located on the side wall of the housing. The oil fume separation device, negative pressure generating device, catalytic purification device, and heat dissipation device are all electrically connected to the intelligent control device. This device has a compact overall structure, is integrated into the cooking table, saves space, and has advantages such as high-efficiency purification, energy saving and noise reduction, and convenient maintenance. It can effectively solve the problems of traditional external oil fume treatment equipment, such as large space occupation, incomplete purification, and high energy consumption, and meet the environmental protection and comfort requirements of modern catering.

Description

Technical Field

[0001] This utility model relates to the field of oil fume treatment technology, specifically a purification device for a smokeless hot pot table. Background Technology

[0002] Traditional cooking tables generate large amounts of oil fumes during cooking, polluting the dining environment, affecting the consumer experience, and posing health risks and environmental pollution problems. Existing fume treatment equipment is mostly external, occupying a large space, inconvenient to install, and has limited processing efficiency, making it difficult to achieve efficient integration and real-time purification in catering establishments. Furthermore, traditional equipment often uses single filtration or electrostatic adsorption methods, resulting in difficulties in cleaning, high energy consumption, high noise levels, and incomplete purification, failing to meet the complex demands of modern catering for environmental protection, energy conservation, and user experience. Therefore, there is an urgent need to develop a compact, highly efficient, stable, and easy-to-maintain purification device for smokeless hot pot tables to achieve source capture, efficient separation, and harmless treatment of oil fumes, while also considering energy saving, noise reduction, and intelligent control, thereby improving the comfort and safety of the dining environment. Utility Model Content

[0003] To solve the above problems, this utility model provides a purification device for a smokeless hot pot table, comprising: The tabletop has a recessed mounting groove in the center to accommodate the pot, and a ventilation channel runs through the center of the bottom of the mounting groove. The cabinet is located below the table and is detachably connected to the table. The cabinet has a partition inside, and the lower end of the exhaust duct passes through the partition and connects with the space below. The oil fume separation device, located below the partition, includes a separation shell, a drive motor, and an oil fume separation disc. The separation shell is detachably connected to the lower surface of the partition, together forming a separation chamber. The drive motor and the oil fume separation disc are both located inside the separation chamber. The oil fume separation disc is located below the exhaust duct, and the drive motor is located below the oil fume separation disc. The oil fume separation disc is coaxially connected to the output shaft of the drive motor, and the drive motor drives the oil fume separation disc to rotate synchronously. The negative pressure generating device is located below the oil fume separation device. It includes a duct volute and a variable frequency fan. The variable frequency fan is located inside the duct volute. The duct volute has an exhaust port. The variable frequency fan drives the airflow from top to bottom through the oil fume separation swivel and then into the duct volute and out through the exhaust port. The bottom of the housing is equipped with an auxiliary cavity, and the auxiliary cavity has an air inlet. The exhaust port of the air duct casing is sealed and connected to the air inlet of the auxiliary cavity through an air guide structure. A catalytic purification device is located above and connected to an auxiliary cavity. The catalytic purification device includes a carrier and a catalyst coating on the surface of the carrier. The carrier is a multi-layer porous structure stacked sequentially along the airflow direction. Each layer of porous structure has multiple through holes penetrating its upper and lower surfaces, and the pore size of the through holes decreases layer by layer from the airflow inlet side to the airflow outlet side. A heat dissipation device is installed on the enclosure and includes at least one exhaust fan and multiple air inlets. The exhaust fan is detachably connected to the enclosure. The enclosure wall is provided with air inlets. The exhaust fan and the air inlets work together to form a directional airflow channel for forcibly exhausting the heat inside the enclosure. The intelligent control device includes a controller, a temperature sensor, and an oil fume concentration sensor. The controller is electrically connected to the oil fume separation device, the negative pressure generating device, the heat dissipation device, the temperature sensor, and the oil fume concentration sensor. The temperature sensor is detachably connected to the inner wall of the chamber for real-time monitoring of the temperature inside the chamber. When the temperature is too high, the variable frequency fan is triggered to increase its speed. The oil fume concentration sensor is located in the exhaust duct for real-time monitoring of the oil fume concentration in the duct. The oil fume concentration sensor is linked to the drive motor so that the controller can adjust the speed of the drive motor according to the oil fume concentration.

[0004] Preferably, the oil fume separation disc includes oil guide blades radially distributed around its central axis, wherein at least some of the oil guide blades have an asymmetrical curved structure.

[0005] Preferably, the bending direction of the asymmetric bending structure alternates along the rotational tangent direction.

[0006] Preferably, the bottom of the separator is provided with a removable oil collection box for collecting the oil sludge separated by centrifugation.

[0007] Preferably, the multi-layer porous structure has at least two layers, namely a first layer and a second layer from bottom to top; the through-hole diameter of the first layer is 30-50 mesh, and the through-hole diameter of the second layer is 100-200 mesh.

[0008] Preferably, the catalyst coating contains a catalyst-active component.

[0009] Preferably, the active component of the catalyst is a noble metal catalyst or a transition metal oxide catalyst.

[0010] Preferably, the surfaces of the air duct casing and auxiliary cavity are provided with an oleophobic coating.

[0011] Preferably, the output shaft of the drive motor is connected to the central shaft of the oil fume separation disc via a coupling, or the output shaft of the drive motor can be directly interference-fitted with the central shaft of the oil fume separation disc.

[0012] Preferably, the carrier is also provided with a mesoporous filter structure.

[0013] The beneficial effects are as follows: First, this application adopts a modular design, with each component being detachable and connectable, facilitating installation, cleaning, and maintenance, and improving ease of use. Second, by combining a sunken installation trough with an exhaust channel and a negative pressure generating device, efficient capture of oil fumes at the source is achieved, with an oil fume collection rate of ≥95%, significantly reducing oil fume dispersion and improving the dining environment. Third, the oil fume treatment process is scientific: first, a centrifugal oil fume separation device removes large oil droplets, and then a catalytic purification device decomposes harmful gases, achieving deep purification of oil fumes, with a VOCs removal rate of ≥90% and particulate matter emission concentration ≤1mg / m³. 3 Fourth, the intelligent control device automatically adjusts the speed of the drive motor and variable frequency fan based on real-time monitoring of the oil fume concentration and the temperature inside the chamber. While ensuring efficient treatment, energy consumption is reduced by 25% compared to traditional equipment, achieving intelligent energy-saving operation. Fifth, the combined effect of shock-absorbing pads and asymmetrical curved oil guide blades keeps the equipment's operating noise ≤45 decibels, greatly improving the user experience. In addition, the overall structure of this equipment is compact and integrated into the cooking table, saving space. It has the advantages of high-efficiency purification, energy saving and noise reduction, and convenient maintenance. It can effectively solve the problems of large space occupation, incomplete purification, and high energy consumption of traditional external oil fume treatment equipment, meeting the environmental protection and comfort requirements of modern catering. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a first-person perspective schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the overall structure from a second perspective in this application; Figure 3 This is a cross-sectional view of this application; Figure 4 This is a cross-sectional view of the catalytic purification device of this application; In the picture: 1. Tabletop; 11. Mounting slot; 111. Ventilation duct; 2. Enclosure; 21. Partition; 22. Auxiliary cavity; 221. Air inlet; 3. Oil fume separation device; 31. Separation shell; 311. Oil collection box; 32. Drive motor; 33. Oil fume separation disc; 4. Negative pressure generating device; 41. Air duct casing; 411. Exhaust outlet; 42. Variable frequency fan; 5. Catalytic purification device; 51. Support; 511. First porous structure; 512. Second porous structure; 52. Catalyst coating; 6. Heat dissipation device; 61. Exhaust fan; 62. Air inlet; 7. Intelligent control device; 71. Controller; 72. Temperature sensor; 73. Oil fume concentration sensor; 74. Alarm. Detailed Implementation

[0015] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0016] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0017] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0018] Example Please see Figures 1 to 3 , Figure 1 This is a first-person perspective schematic diagram of the overall structure of this application. Figure 2 This is a schematic diagram of the overall structure from a second perspective in this application. Figure 3 This is a cross-sectional view of the present application. This embodiment provides a purification device for a smokeless hot pot table, comprising a tabletop 1, a housing 2, an oil fume separation device 3, a negative pressure generating device 4, a catalytic purification device 5, a heat dissipation device 6, and an intelligent control device 7. All the above components adopt a modular design, facilitating installation, disassembly, and maintenance. The overall structure is compact and integrated within the cooking table, enabling efficient treatment and safe emission of oil fumes.

[0019] See also Figure 1In this embodiment, the tabletop 1 is a rectangular flat plate structure, but it can also be a circular flat plate structure, made of high-temperature resistant stainless steel. A recessed mounting groove 11 is provided at the center of the tabletop 1. This mounting groove 11 is used to accommodate a pot, such as a frying pan or a soup pot. The recessed mounting groove 11 ensures stable placement of the pot. A ventilation channel 111 is formed through the center of the bottom of the mounting groove 11. The ventilation channel 111 is a circular channel with a diameter matching the bottom of the pot. A ring-shaped heating element, such as a heating wire (not shown in the figure), is provided at the outlet of the ventilation channel 111. A Hall effect current sensor is connected in series on the main power line supplying power to the pot. Of course, if a pluggable electric pot is used, a current sensor can be embedded inside the electrical connector between the pot and the table, such as an aviation plug; this is existing technology and will not be elaborated further. The ventilation channel 111 directly targets the pot to capture oil fumes at the source, ensuring effective absorption of oil fumes and reducing their escape. The inner surfaces of the tabletop 1 and the mounting groove 11 are coated with a 15-25μm Teflon coating to prevent oil stains from adhering and to facilitate cleaning.

[0020] See also Figure 2 and Figure 3 The housing 2 is located below the tabletop 1 and is a rectangular shell. It can be detachably connected to the tabletop 1 via screws, snap-fit ​​connections, or quick-connect fittings. Inside the housing 2, there is a horizontally placed partition 21. This partition 21 can be integrally formed with the housing 2 or detachably connected to the housing 2 via a sliding rail structure or a plug-in structure. The partition 21 divides the interior of the housing 2 into upper and lower spaces. The upper space accommodates the sunken installation slot 11, and the lower space accommodates the oil fume separation device 3, the negative pressure generating device 4, and the catalytic purification device 5. A hole is formed in the center of the partition 21, through which the lower end of the exhaust duct 111 passes and connects to the lower space. Specifically, the lower end of the exhaust duct 111 engages with the edge of the central hole in the partition 21, and a high-temperature resistant silicone sealing ring is embedded at the engagement point.

[0021] See also Figure 3 The oil fume separation device 3 is located below the horizontal partition 21 and includes a separation housing 31, a drive motor 32, and an oil fume separation disc 33. The separation housing 31 is detachably connected to the lower surface of the partition 21 by means of snap-fit ​​connection, threaded connection, screw connection, etc., together forming a separation chamber. A detachable oil collection box 311 is provided at the bottom of the separation housing 31 to collect the oil sludge separated by centrifugation. The oil collection box 311 is connected to the bottom of the separation housing 31 by a plug-in structure for easy disassembly. For example, inserts are provided on both sides of the oil collection box 311, and slots that fit the inserts are provided at the bottom of the separation housing 31. A liquid level sensor is provided inside the oil collection box 311 to monitor the oil level. The liquid level sensor is electrically connected to an alarm 74, which is located on the outer wall of the housing 2. The liquid level sensor can trigger the alarm 74 when the oil is full to prevent overflow.

[0022] See also Figure 3 Both the drive motor 32 and the fume separation disc 33 are installed inside the separation chamber. The fume separation disc 33 is located below the exhaust duct 111, and the drive motor 32 is vertically positioned below the fume separation disc 33. The output shaft of the drive motor 32 is coaxially connected to the central shaft of the fume separation disc 33 via a coupling. Alternatively, the output shaft of the drive motor 32 can be directly press-fitted to the central shaft of the fume separation disc 33, allowing the drive motor 32 to drive the fume separation disc 33 to rotate synchronously. A shock-absorbing pad, made of silicone or rubber, is provided between the drive motor 32 and the disc to effectively reduce vibration and noise. The oil fume separation disc 33 includes oil guide blades radially distributed around its central axis. At least a portion of the oil guide blades have an asymmetric curved structure. The bending direction of the asymmetric curved structure alternates along the rotation tangent to increase the interception area of ​​the oil fume airflow while reducing vibration and noise caused by airflow turbulence during rotation. The curvature of the curved structure surface changes continuously to guide oil droplets to flow along a specific path and be thrown towards the inner wall of the separation shell 31 under the action of centrifugal force, and then flow into the oil collection box 311, greatly improving the separation efficiency.

[0023] See also Figure 3 The negative pressure generating device 4 is located below the oil fume separation device 3, and includes a duct volute 41 and a variable frequency fan 42 (not fully shown in the figure). The duct volute 41 optimizes the airflow path and reduces pressure loss. The variable frequency fan 42 provides adjustable negative pressure and automatically adjusts the airflow according to the amount of oil fume, achieving energy efficiency. The duct volute 41 is a spiral shell that houses the variable frequency fan 42. The duct volute 41 has an exhaust port 411 located on its side wall or bottom. The variable frequency fan 42 drives the airflow from top to bottom through the oil fume separation disc 33 and into the duct volute 41, and then discharges it from the exhaust port 411. The duct volute 41 can be detachably connected to the separation shell 31 by means of snap-fit ​​connection, threaded connection, screw connection, etc.

[0024] See also Figure 3 The bottom of the housing 2 is provided with an auxiliary cavity 22, on which an air inlet 221 is provided. The exhaust port 411 of the duct housing 41 is sealed and connected to the air inlet 221 of the auxiliary cavity 22 through an air guiding structure. The air guiding structure is specifically an air guiding hose, which is made of high-temperature resistant materials such as silicone or fluororubber to ensure that it does not deform at high temperatures. The surfaces of the duct housing 41 and the auxiliary cavity 22 can be coated with an oleophobic coating to reduce oil adhesion.

[0025] See also Figure 3 The catalytic purification device 5 is fixed above the auxiliary chamber 22 by a bracket and communicates with the auxiliary chamber 22. It is spatially isolated from other components within the housing 2. The auxiliary chamber 22 contains an auxiliary heating component, such as a heating wire (not shown in the figure), which is electrically connected to the controller 71. Please refer to... Figure 4 , Figure 4 This is a cross-sectional view of the catalytic purification device of this application. The catalytic purification device 5 includes a carrier 51, which is a multi-layer porous structure stacked sequentially along the airflow direction. Each layer of the porous structure has multiple through holes penetrating its upper and lower surfaces, and the pore size of the through holes decreases layer by layer from the airflow inlet side to the airflow outlet side. Specifically, the multi-layer porous structure has at least two layers, namely, a first layer porous structure 511 and a second layer porous structure 512 from bottom to top; the pore size of the first layer porous structure 511 is 30-50 mesh, and the pore size of the second layer porous structure 512 is 100-200 mesh. Of course, a third layer porous structure can be added above the second layer porous structure 512. (Not shown in the figure), the pore size of the third porous structure is 220-320 mesh. The carrier 51 can be made of metal such as Fe-Cr-Al alloy or ceramic material. Fe-Cr-Al alloy has good thermal conductivity and high mechanical strength, making it suitable for rapid ignition scenarios. Ceramic has advantages such as high temperature resistance and good chemical stability. The surface of the carrier 51 is coated with a catalyst coating 52, which contains catalyst active components. The catalyst active components are noble metal catalysts or transition metal oxide catalysts. The noble metal catalyst is a palladium-platinum bimetallic catalyst, and the transition metal oxide catalyst is a manganese-based or cobalt-based oxide. The multi-layer structure with decreasing pore size gradient can achieve uniform airflow distribution and step-by-step filtration, while also improving the purification efficiency of pollutants through synergistic effects with the catalytic reaction.

[0026] See also Figure 1 , Figure 2 and Figure 3 The heat dissipation device 6 is located on the side wall of the housing 2, including at least one exhaust fan 61 and multiple air inlets 62. The exhaust fan 61 is fixed to the side wall of the housing 2 with screws, and the air inlets 62 are located on the other side wall of the housing 2. More preferably, one exhaust fan 61 can be set on each of the opposite sides of the housing 2, and air inlets 62 can be set on the other opposite sides. A louvered baffle can be set at the air inlet 62, with the baffle forming an angle of 15°-30° with the horizontal plane. The air inlet 62 facilitates the entry of external air into the housing 2, and the louvered baffle not only prevents the entry of external foreign objects but also optimizes airflow distribution and improves heat dissipation efficiency. The exhaust fan 61 and the air inlets 62 work together to form a directional airflow channel for forced exhaust of heat from the inside of the housing 2.

[0027] See also Figure 3The intelligent control device 7 is electrically connected to the oil fume separation device 3, the negative pressure generating device 4, and the heat dissipation device 6. The intelligent control device 7 includes a controller 71, a first temperature sensor (not shown in the figure), a second temperature sensor 72, a third temperature sensor (not shown in the figure), an oil fume concentration sensor 73, and an alarm 74. The controller 71 can be a PLC controller 71. The second temperature sensor 72 is set on the inner wall of the box 2 away from the catalytic area and is detachably connected to the inner wall of the box 2 by a buckle or magnetic attraction for real-time monitoring of the temperature inside the box 2. The first temperature sensor (not shown in the figure) is embedded in the mounting groove 11 for monitoring the temperature of the bottom of the pot. The third temperature sensor (not shown in the figure) is set near the carrier 51 for monitoring the temperature of the carrier 51. The oil fume concentration sensor 73 is set in the exhaust channel 111 for real-time monitoring of the oil fume concentration. The oil fume concentration sensor 73 is linked with the drive motor 32. The first temperature sensor (not shown in the figure), the second temperature sensor 72, the third temperature sensor (not shown in the figure), the oil fume concentration sensor 73, the alarm 74, the annular heating assembly (not shown in the figure), the auxiliary heating assembly (not shown in the figure), the oil fume separation device 3, and the negative pressure generating device 4 are all electrically connected to the controller 71. The controller 71 performs unified data acquisition, analysis, and logical judgment, and automatically adjusts the working status of each actuator according to the preset control strategy. When the second temperature sensor 72 detects that the temperature inside the housing 2 is too high, the controller 71 triggers the variable frequency fan 42 to increase its speed to enhance heat dissipation and prevent the equipment from overheating. When the oil fume concentration is high, the controller 71 increases the speed of the drive motor 32 to enhance the separation effect; when the concentration is low, it reduces the speed to save energy. This intelligent adjustment achieves efficient processing and energy-saving operation.

[0028] During cooking, the fumes generated by the pot are drawn into the exhaust duct 111, centrifuged by the fume separator 33, and the oil droplets are collected in the oil collection box 311. The remaining airflow enters the duct housing 41 under negative pressure, and then enters the auxiliary chamber 22 through the air guide hose. The airflow is catalytically oxidized in the catalytic purification device 5, and finally discharged as clean air through the heat dissipation device 6. The modular design of this equipment makes installation and maintenance simple, and the detachable connection facilitates cleaning. The sunken installation tank 11 reduces the diffusion of fumes, and the exhaust duct 111 and the negative pressure device form a directional airflow, achieving a fume collection rate of ≥95%. First, large oil droplets are removed by centrifugal separation, and then harmful gases are decomposed by catalytic purification. Through the combination of fume separation and catalytic purification, the treatment efficiency is high, with a VOCs removal rate of ≥90% and a particulate matter emission concentration of ≤1mg / m³. 3This results in more environmentally friendly emissions. The intelligent control device 7 automatically adjusts the speed of the drive motor and variable frequency fan based on the oil fume concentration and the temperature inside the chamber 2, reducing energy consumption by 25% compared to traditional fixed-speed equipment. Shock-absorbing pads reduce vibration transmission, and the asymmetric bending structure of the oil guide blades further reduces operating noise to ≤45 decibels. Furthermore, the equipment has a compact overall structure, integrated into the cooking table, saving space. It combines high-efficiency purification, energy saving and noise reduction, and convenient maintenance, effectively solving the problems of large space occupation, incomplete purification, and high energy consumption associated with traditional external oil fume treatment equipment, meeting the environmental protection and comfort requirements of modern catering.

[0029] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A purification device for a smokeless hot pot table, characterized in that, include: The tabletop has a recessed mounting groove in its center, and a ventilation channel is formed through the center of the bottom of the mounting groove. The housing is located below the tabletop and is detachably connected to the tabletop. The housing is equipped with a partition, and the lower end of the exhaust duct passes through the partition and communicates with the space below. An oil fume separation device, located below the partition, includes a separation shell, a drive motor, and an oil fume separation disc. The separation shell is detachably connected to the lower surface of the partition, together forming a separation chamber. The drive motor and the oil fume separation disc are both located within the separation chamber. The oil fume separation disc is located below the exhaust duct, and the drive motor is located below the oil fume separation disc. The oil fume separation disc is coaxially connected to the output shaft of the drive motor. A negative pressure generating device is located below the oil fume separation device, including a duct casing and a variable frequency fan. The variable frequency fan is located inside the duct casing, and the duct casing has an exhaust port. The bottom of the housing is provided with an auxiliary cavity, and the auxiliary cavity is provided with an air inlet. The exhaust port of the air duct volute is sealed and connected to the air inlet of the auxiliary cavity through an air guiding structure. A catalytic purification device is disposed above and communicates with the auxiliary cavity. The catalytic purification device includes a carrier and a catalyst coating coated on the surface of the carrier. The carrier is a multi-layer porous structure stacked sequentially along the airflow direction. Each layer of the porous structure has multiple through holes penetrating its upper and lower surfaces, and the pore size of the through holes decreases layer by layer from the airflow inlet side to the airflow outlet side. A heat dissipation device is provided on the housing, including at least one exhaust fan and multiple air inlets. The exhaust fan is detachably connected to the housing, and the housing wall is provided with air inlets. The intelligent control device includes a controller, a temperature sensor, and an oil fume concentration sensor. The controller is electrically connected to the oil fume separation device, the negative pressure generating device, the heat dissipation device, the temperature sensor, and the oil fume concentration sensor. The temperature sensor is detachably connected to the inner wall of the box for real-time monitoring of the temperature inside the box. The oil fume concentration sensor is located in the exhaust channel for real-time monitoring of the oil fume concentration in the channel.

2. The purification device for the smokeless hot pot table according to claim 1, characterized in that, The oil fume separation disc includes oil guide blades radially distributed around its central axis, wherein at least some of the oil guide blades have an asymmetrical curved structure.

3. The purification device for the smokeless hot pot table according to claim 2, characterized in that, The bending direction of the asymmetric bending structure alternates along the rotational tangent direction.

4. The purification device for the smokeless hot pot table according to claim 1, characterized in that, The bottom of the separation shell is equipped with a removable oil collection box for collecting oil sludge separated by centrifugation.

5. The purification device for the smokeless hot pot table according to claim 1, characterized in that, The multi-layer porous structure has at least two layers, namely, a first layer and a second layer from bottom to top; the through-hole diameter of the first layer is 30-50 mesh, and the through-hole diameter of the second layer is 100-200 mesh.

6. The purification device for the smokeless hot pot table according to claim 1, characterized in that, The catalyst coating contains a catalyst-active component.

7. The purification device for the smokeless hot pot table according to claim 6, characterized in that, The active component of the catalyst is a noble metal catalyst or a transition metal oxide catalyst.

8. The purification device for the smokeless hot pot table according to claim 1, characterized in that, The surfaces of the air duct volute and auxiliary cavity are coated with an oleophobic coating.

9. The purification device for the smokeless hot pot table according to claim 1, characterized in that, The output shaft of the drive motor is connected to the central shaft of the oil fume separation disc via a coupling. Alternatively, the output shaft of the drive motor can be directly press-fitted to the central shaft of the oil fume separation disc.

10. The purification device for the smokeless hot pot table according to claim 1, characterized in that, The carrier is also provided with a mesoporous filter structure.

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