Lampblack filtering device and range hood

Abstract

The utility model provides an oil fume filtering device and a range hood. The oil fume filtering device comprises a filtering pipeline, and an activated carbon block, a spray purification structure and an ionization purification structure which are arranged in the filtering pipeline. The activated carbon block and the spray purification structure are used for adsorbing and filtering oil fume entering the filtering flue based on a physical adsorption mode, and the ionization purification structure is used for adsorbing and filtering oil fume entering the filtering pipeline based on an electrochemical adsorption mode. In the scheme, the activated carbon block, the spray purification structure and the ionization purification structure are used for adsorbing oil fume based on a physical adsorption mode and an electrochemical adsorption mode respectively, so that the defects of large wind resistance and the like in a mode of adsorbing by purely adopting a plurality of activated carbon blocks in the prior art can be avoided; the oil smoke adsorption efficiency can be improved, and good circulation of airflow is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen appliance technical field, specifically, an oil fume filtering device and range hood. BACKGROUND

[0002] In the filtering system of the traditional range hood, the adsorption and filtration of oil fume are generally realized by setting multiple activated carbon blocks. The multiple activated carbon blocks are arranged and stacked to sequentially perform the adsorption and filtration of oil fume, so as to achieve good filtering effect.

[0003] However, the multiple activated carbon blocks are arranged in sequence in the above-mentioned arrangement and stacking mode, which is prone to cause channeling phenomenon, and further affects the filtering effect of oil fume. In addition, the multiple activated carbon blocks are arranged in sequence in the filtering pipeline, which increases the air resistance on the oil fume circulation path and affects the circulation of air flow. SUMMARY

[0004] The purpose of the embodiment of the utility model is to provide an oil fume filtering device and range hood, which can improve the oil fume adsorption efficiency and ensure good circulation of air flow.

[0005] In a first aspect, the utility model provides an oil fume filtering device applied to a range hood, which comprises a filtering pipeline, and activated carbon blocks, a spray purification structure and an ionization purification structure arranged in the filtering pipeline.

[0006] The activated carbon blocks and the spray purification structure adsorb and filter the oil fume entering the filtering pipeline based on the physical adsorption mode.

[0007] The ionization purification structure adsorbs and filters the oil fume entering the filtering pipeline based on the electrochemical adsorption mode.

[0008] In an optional embodiment, the spray purification structure comprises a water guide assembly and a spray assembly.

[0009] The water guide assembly is used to guide water from outside and deliver the water to the spray assembly.

[0010] The spray assembly is used to generate spray based on the water and spray the spray into the filtering pipeline.

[0011] In an optional embodiment, the water guide assembly comprises a water receiving box and a water guide pipe.

[0012] The water receiving box is arranged on the hood top of the range hood and is used to receive the guided water.

[0013] One end of the water guide pipe is connected to the water outlet of the water receiving box, and the other end is connected to the spray assembly, which is used to deliver the water in the water receiving box to the spray assembly.

[0014] In an optional embodiment, the spraying assembly comprises a connecting piece and spraying plates located at opposite ends of the connecting piece, the connecting piece and the spraying plates are hollow and communicate with each other, and a water guide pipe is connected to the connecting piece.

[0015] The two spraying plates are oppositely arranged in the radial direction of the filtering pipeline, and a plurality of spray heads are arranged on the two opposite surfaces of the spraying plates, respectively.

[0016] In an optional embodiment, a plurality of water guide channels are arranged in the connecting piece and the spraying plates, and each water guide channel is used to deliver water introduced from the water guide pipe to each spray head.

[0017] In an optional embodiment, the spraying assembly further comprises a pressurizing assembly used to pressurize the water in the connecting piece and the spraying plates.

[0018] In an optional embodiment, the ionization purification structure comprises a plurality of adsorption columns.

[0019] The plurality of adsorption columns are arranged on the inner walls of the pipelines opposite to each other, and an electric field is generated between the plurality of adsorption columns after being electrified, so that the oil fume in the filtering pipeline and in the electric field is adsorbed on the adsorption columns.

[0020] In an optional embodiment, the adsorption column is a graphite column.

[0021] In an optional embodiment, the plurality of adsorption columns are arranged in a staggered manner.

[0022] In the second aspect, the utility model provides a kind of range hood, including smoke machine mesa, fan device, heating device and the oil fume filtering device of any one of preceding embodiment;

[0023] Fan device, heating device and oil fume filtering device are arranged below smoke machine mesa.

[0024] Oil fume filtering device is communicated to the air outlet of fan device, for being adsorbed and filtered after being handled by fan device, is discharged to indoor or outdoor.

[0025] The utility model provides a kind of oil fume filtering device and extractor hood, and the oil fume filtering device includes filter duct and the activated carbon block, spray purification structure and ionization purification structure being set in filter duct.The activated carbon block and spray purification structure are based on physical adsorption mode to the oil fume in the filter flue into adsorption filtering, and ionization purification structure is based on electrochemical adsorption mode to the oil fume in the filter duct into adsorption filtering.In the scheme, through activated carbon block, spray purification structure, ionization purification structure are based on physical adsorption mode and electrochemical adsorption mode respectively to carry out oil fume adsorption, the defects such as the wind resistance of the mode that multiple activated carbon blocks are simply used in prior art can be avoided, can improve oil fume adsorption efficiency and guarantee good circulation of airflow. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in the embodiments of the utility model, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying creative labor, other related drawings can also be obtained according to these drawings.

[0027] Figure 1 The structure schematic diagram of extractor hood provided for the embodiments of the utility model is shown in the figure.

[0028] Figure 2 The structure schematic diagram of oil fume filtering device provided for the embodiments of the utility model is shown in the figure.

[0029] Figure 3 Another structure schematic diagram of oil fume filtering device provided for the embodiments of the utility model is shown in the figure.

[0030] Figure 4 The structure schematic diagram of ionization purification structure provided for the embodiments of the utility model is shown in the figure.

[0031] Figure 5 The circulation schematic diagram of oil fume between adsorption column in the embodiments of the utility model is shown in the figure.

[0032] Figure: 1-extractor hood;11-oil fume filtering device;111-filter duct;1111-inhale opening;1112-exhaust port;112-activated carbon block;113-spray purification structure;1131-water guide component;11311-water receiving box;11312-water guide pipe;1132-spray component;11321-connector;11322-spray plate;11323-spray head;114-ionization purification structure;1141-adsorption column;12-smoke machine mesa;13-fan device;131-suction port;14-heating device. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0034] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Figure 1 As shown is a structural schematic view of an extractor hood 1 provided by the embodiments of the present application, the extractor hood 1 comprises a hood top 12, a fan device 13, a heating device 14 and an oil fume filtering device 11. In the installed condition, the hood top 12 is generally embedded in the cooktop top, the hood top 12 is located above, and the fan device 13, the heating device 14 and the oil fume filtering device 11 are located below the hood top 12.

[0037] Specifically, the heating device 14 is embeddedly arranged on the hood top 12, thus, a part of the heating device 14 is located below the hood top 12, and another part is located on the surface of the hood top 12. The part of the heating device 14 located below the hood top 12 can generate heat and provide the heat to the other part of the heating device 14 located on the surface of the hood top 12. When cooking is needed, a pot or the like can be placed on the heating device 14 on the surface of the hood top 12, and the heating device 14 can provide heat for the pot after being turned on, so as to provide heat for the food in the pot to cook.

[0038] The fan device 13 is arranged below the cooking machine table 12, and includes an air suction port 131 and an air outlet (not shown in the figure). The air suction port 131 of the fan device 13 is located on the surface of the cooking machine table 12. When the fan device 13 is turned on, the oil fume and water vapor generated during cooking are sucked into the fan device 13 from the air suction port 131 of the fan device 13 under the negative pressure generated by the fan device 13.

[0039] An adsorption module (not shown in the figure) is further arranged in the fan device 13, which can be activated carbon or the like. The adsorption module can be used to effectively adsorb most of the oil in the oil fume, so that the adsorbed oil fume can meet the relevant oil separation standards.

[0040] The oil fume filtering device 11 is connected to the air outlet of the fan device 13. The oil fume treated by the fan device 13 is discharged from the air outlet of the fan device 13 and enters the oil fume filtering device 11. After being treated by the oil fume filtering device 11, including filtering treatment and odor removal treatment of the oil fume, the oil fume is discharged from the oil fume filtering device 11.

[0041] In order to ensure that the oil fume can be adsorbed as effectively as possible and the air quality in and out of the room is ensured, the oil fume filtering device 11 is improved in the utility model. Specifically, please refer to Figure 2 The oil fume filtering device 11 provided by the utility model comprises a filter pipeline 111 and activated carbon blocks 112, a spray purification structure 113 and an ionization purification structure 114 arranged in the filter pipeline 111.

[0042] The activated carbon blocks 112 and the spray purification structure 113 adsorb and filter the oil fume entering the filter pipeline 111 based on a physical adsorption mode. The ionization purification structure 114 adsorbs and filters the oil fume entering the filter pipeline 111 based on an electrochemical adsorption mode.

[0043] In the embodiment, the so-called physical adsorption mode is a mode for capturing and separating oil and particulate matters in the oil fume by mechanical means, for example, a filter screen, activated carbon, a centrifugal separation device, a gravity drainage device, a spraying device and the like can be used to realize the physical adsorption mode.

[0044] The so-called electrochemical adsorption mode is a mode for adsorbing oil and small particles in the oil fume by using an electric field, for example, a high-voltage electric field, ionization and deposition and the like can be used to realize the electrochemical adsorption mode.

[0045] In the embodiment, the activated carbon block 112, the spray purification structure 113 and the ionization purification structure 114 are sequentially arranged in the filtering pipeline 111. The filtering pipeline 111 includes an air inlet 1111 and an air outlet 1112. The filtering pipeline 111 is connected to the air outlet of the fan device 13 through the air inlet 1111, so as to communicate with the fan device 13.

[0046] The activated carbon block 112 is arranged at one end of the filtering pipeline 111 close to the air inlet 1111. The ionization purification structure 114 is arranged at one end of the filtering pipeline 111 close to the air outlet 1112. The spray purification structure 113 can be arranged at the middle position. Alternatively, the spray purification structure 113 can be arranged at one end of the filtering pipeline 111 close to the air outlet 1112, and the ionization purification structure 114 can be arranged at the middle position.

[0047] In this way, the oil fume discharged from the air outlet of the fan device 13 will pass through the activated carbon block 112, which can adsorb large particles of grease molecules and water vapor in the oil fume. The activated carbon block 112 has the characteristics of high specific surface area, porous structure, etc., and has a large number of micropores on the surface, so as to provide a large number of adsorption sites, effectively realizing the adsorption of the oil fume. The porous structure of the activated carbon block 112 enables it to capture and adsorb molecules of different sizes.

[0048] In order to avoid the channeling phenomenon and increase the wind resistance that may exist when multiple activated carbon blocks 112 are used, in the embodiment, the number of activated carbon blocks 112 is one, and one activated carbon block 112 can be used to preliminarily treat the oil fume.

[0049] The remaining oil fume will pass through the spray purification structure 113, which can rapidly cool the oil fume in a high-temperature state, rapidly remove small molecules and pollution particles in the oil fume, and further achieve the purpose of purification.

[0050] The oil fume that is not treated by the spray purification structure 113 will reach the ionization purification structure 114. Under the action of the ionization purification structure 114, the small particles in the oil fume are charged and then adsorbed by the ionization purification structure 114, so as to achieve the purpose of purifying the gas. Finally, the treated gas will be discharged from the air outlet 1112 of the filtering module to the indoor or outdoor.

[0051] The oil fume filtering device 11 provided by the embodiment can avoid the defects of large air resistance and the like in the prior art by using multiple activated carbons for adsorption. In the present scheme, the oil fume is purified by combining multiple means such as carbon blocks, spraying and ionization, thereby reducing air resistance, improving the exhaust effect and purification effect, and ultimately realizing the circulation of the gas. In this way, the problem of affecting the user experience and the like caused by the high oil fume content and unpleasant odor of the gas discharged into the indoor or outdoor environment due to the failure to replace the filtering and adsorption modules in the flue in time can be avoided.

[0052] Please refer to Figure 3 In the embodiment, the spraying purification structure 113 includes a water guide assembly 1131 and a spraying assembly 1132. The water guide assembly 1131 is used to guide water from the outside and deliver the water to the spraying assembly 1132. The spraying assembly 1132 is used to generate spraying based on the water and spray the spraying into the filtering pipeline 111.

[0053] When the oil fume flows through the filtering pipeline 111, the spraying generated by the spraying assembly 1132 can cool the oil fume at the position where the spraying assembly 1132 is located. The cooled oil fume condenses in the filtering pipeline 111, and part of the oil fume also condenses in the filtering pipeline 111 under the action of the spraying. The oil fume condensed in the filtering pipeline 111 finally flows into the oil cup.

[0054] As shown in Figure 3 In the embodiment, the water guide assembly 1131 includes a water receiving box 11311 and a water guide pipe 11312. The water receiving box 11311 is arranged on the smoke machine countertop 12 included in the range hood 1 and is used to receive the guided water. Specifically, the water receiving box 11311 can be embedded in the smoke machine countertop 12. The water receiving box 11311 can use a water injection mode of automatically guiding water or a water injection mode of manually adding water.

[0055] The top of the water receiving box 11311 can have a pipeline for guiding water from the outside. For example, the water receiving box 11311 has a water level detection module, and an automatic valve is arranged in the pipeline. The water level detection module can be used to detect the water level of the water in the water receiving box 11311. When the water level detection module detects that the water level of the water in the water receiving box 11311 is lower than a preset water level, the automatic valve can be controlled to open to automatically guide water from the outside into the water receiving box 11311.

[0056] In addition, the top of the water receiving box 11311 can also have a box cover. When it is necessary to add water, the user can open the box cover and manually add water.

[0057] The water receiving box 11311 comprises a water outlet (not shown in the figure) at the bottom, and the water guide pipe 11312 is connected to the water outlet of the water receiving box 11311 at one end and to the spray assembly 1132 at the other end, and is used to transport the water in the water receiving box 11311 to the spray assembly 1132.

[0058] The water guide pipe 11312 can be a flexible pipe, so that it can be suitable for different installation space sizes.

[0059] The spray assembly 1132 comprises a connecting piece 11321 and two spray plates 11322 located at opposite ends of the connecting piece 11321, the connecting piece 11321 and the spray plates 11322 are hollow inside and communicate with each other, and the water guide pipe 11312 is connected to the connecting piece 11321. It can be understood that the two spray plates 11322 are arranged in parallel and opposite to each other, and the connecting piece 11321 is located between the two spray plates 11322 and connected to the spray plates 11322 at both ends.

[0060] The two spray plates 11322 are arranged opposite to each other in the radial direction of the filter duct 111, and a plurality of spray heads 11323 are arranged on the two opposite surfaces of the spray plates 11322, respectively.

[0061] The water guide pipe 11312 is connected to the connecting piece 11321, and the two ends of the connecting piece 11321 are provided with the spray plates 11322, respectively, and the inside of the connecting piece 11321 and the spray plates 11322 is hollow, that is, the water guide pipe 11312 guides the water into the connecting piece 11321, and the water flows into the inside of the spray plates 11322 at both ends through the flow space inside the connecting piece 11321, respectively. The two opposite surfaces of the spray plates 11322 are provided with spray heads 11323, that is, the spray heads 11323 are arranged on the surfaces of the spray plates 11322 facing the filter duct 111. The water flowing into the spray plates 11322 will be sprayed from each spray head 11323, respectively, thereby playing a role of adsorbing and filtering the oil fume in the filter duct 111.

[0062] In this embodiment, in order to ensure uniform spraying of water by each spray head 11323, a plurality of water guide channels are arranged in the connecting piece 11321 and each spray plate 11322, and each water guide channel is used to transport the water guided from the water guide pipe 11312 to each spray head 11323.

[0063] That is, the water connection 11321 and the large flow space inside the spray plate 11322 are divided into multiple small flow paths by the multiple water guide channels, so that the water introduced from the water guide pipe 11312 can flow into each water guide channel relatively uniformly, and each water guide channel has a corresponding spray head 11323, so that the uniform spraying of water by each spray head 11323 can be ensured, avoiding the situation that some spray heads 11323 spray a large amount of water, while some spray heads 11323 spray a small amount of water or even no water is sprayed, thereby failing to effectively filter the oil fume at different heights in the filter pipe 111.

[0064] In the embodiment, in order to strengthen the filtering effect of the oil fume, the spray assembly 1132 further includes a pressurizing assembly, which can be used to pressurize the water in the water connection 11321 and the spray plate 11322. In this way, after the pressurization of the water by the pressurizing assembly, the water sprayed from each spray head 11323 has a greater pressure, and the water sprayed has a greater force on the oil fume, thereby more effectively condensing the oil fume in the filter pipe 111 and improving the filtering effect.

[0065] In order to accelerate the condensation of the oil fume in the filter pipe 111, the oil fume filtering device 11 can further include a refrigeration structure connected to the spray purification structure 113, specifically, connected to the water receiving box 11311 or the spray assembly 1132 in the spray purification structure 113, so that the water in the water receiving box 11311 or the spray assembly 1132 can be refrigerated to reduce the temperature of the water. In this way, the oil fume is sprayed with water at a lower temperature, which can more quickly achieve the cooling of the oil fume and accelerate the condensation of the oil fume.

[0066] Please refer to Figure 4 In the embodiment, the ionization purification structure 114 includes multiple adsorption columns 1141, which are respectively arranged on the opposite inner walls of the filter pipe 111, for example, on the upper and lower inner walls of the filter pipe 111, or on the front and rear inner walls of the filter pipe 111. After being electrified, an electric field is generated between the multiple adsorption columns 1141, so that the oil fume located in the filter pipe 111 and in the electric field is adsorbed onto each adsorption column 1141.

[0067] In the embodiment, under the condition that the power supply is turned on, the adsorption columns 1141 located on the opposite sides of the inner wall of the pipe correspond to the cathode and the anode, so that an electric field is generated by high-voltage discharge, the tiny particles in the oil fume are charged, and the charged tiny particles are adsorbed onto the adsorption columns 1141 under the action of the electric field force, thereby achieving the purpose of adsorbing and filtering the oil fume.

[0068] In this embodiment, the material of the adsorption column 1141 is a semiconductor material or a conductor material, such as silicon, gallium arsenide, silicon carbide, graphite, etc.

[0069] In this embodiment, the adsorption column 1141 can be a graphite column. Graphite has the characteristics of high temperature resistance and chemical stability, and can remain stable at high temperatures and does not easily react with other substances. Therefore, using a graphite column is low in cost and has good adsorption performance.

[0070] like Figure 5 As shown in the figure, in this embodiment, multiple adsorption columns 1141 are arranged in an alternating manner. For example, multiple adsorption columns 1141 located on the upper inner wall of the pipe are arranged in an alternating manner, and multiple adsorption columns 1141 located on the lower inner wall of the pipe are also arranged in an alternating manner. Figure 5 The middle arrow indicates the flow of oil fumes between multiple adsorption columns 1141.

[0071] By arranging multiple adsorption columns 1141 in a staggered manner, the residence time of oil fumes within the filter pipe 111 can be increased, and flow resistance can be reduced, ensuring smooth gas flow. This effectively prevents oil fumes from bypassing the adsorption columns 1141, resulting in relatively high purification efficiency and better purification effect.

[0072] In summary, the oil fume filtration device 11 provided in this embodiment includes a filter pipe 111 and activated carbon blocks 112, a spray purification structure 113, and an ionization purification structure 114 disposed within the filter pipe 111. The activated carbon blocks 112 and the spray purification structure 113 adsorb and filter the oil fumes entering the filter pipe 111 based on physical adsorption, while the ionization purification structure 114 adsorbs and filters the oil fumes entering the filter pipe 111 based on electrochemical adsorption. In this solution, by using activated carbon blocks 112, spray purification structure 113, and ionization purification structure 114 to adsorb oil fumes based on physical adsorption and electrochemical adsorption respectively, the high wind resistance and other defects of the prior art's method of simply using multiple activated carbons for adsorption can be avoided, thus improving the oil fume adsorption efficiency and ensuring airflow circulation.

[0073] Furthermore, the range hood 1 provided in this embodiment of the present invention, based on the activated carbon block 112, spray purification structure 113, and ionization purification structure 114 in the fume filtration device 11 of the range hood 1, purifies the fume and reduces wind resistance by combining multiple means such as carbon block, spray and ionization, which can improve the smoke exhaust effect, enhance the purification effect, and ensure the air quality discharged to the indoor or outdoor environment.

[0074] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0075] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil fume filtration device, characterized in that, Applied to range hoods, the fume filtration device includes a filter pipe and activated carbon blocks, a spray purification structure, and an ionization purification structure disposed within the filter pipe; The activated carbon block and the spray purification structure adsorb and filter the oil fumes entering the filter pipe based on physical adsorption. The ionization purification structure uses electrochemical adsorption to adsorb and filter the oil fumes entering the filter pipe.

2. The oil fume filtration device according to claim 1, characterized in that, The spray purification structure includes a water guiding component and a spray component; The water guiding component is used to introduce water from the outside and deliver the water to the spray component; The spray assembly is used to generate a spray based on the water and spray the spray into the filter pipe.

3. The oil fume filtration device according to claim 2, characterized in that, The water guiding assembly includes a water receiving box and a water guiding pipe; The water receiving box is installed on the range hood platform and is used to receive the incoming water. One end of the water pipe is connected to the outlet of the water receiving box, and the other end is connected to the spray assembly, for conveying the water in the water receiving box to the spray assembly.

4. The oil fume filtration device according to claim 3, characterized in that, The spray assembly includes a connector and spray plates located at opposite ends of the connector. The connector and each of the spray plates are hollow and interconnected. The water guide pipe is connected to the connector. The two spray plates are arranged opposite each other in the radial direction of the filter pipe, and multiple nozzles are respectively provided on the two opposite surfaces of the spray plates.

5. The oil fume filtration device according to claim 4, characterized in that, The connector and each of the spray plates are provided with multiple water guiding channels, each of the water guiding channels being used to transport water introduced from the water guiding pipe to each of the nozzles.

6. The oil fume filtration device according to claim 4, characterized in that, The spray assembly also includes a pressurization assembly for pressurizing the water in the connector and the spray plate.

7. The oil fume filtration device according to claim 1, characterized in that, The ionization purification structure includes multiple adsorption columns; The plurality of adsorption columns are distributed on the inner wall of the filter pipe at opposite positions. When energized, an electric field is generated between the plurality of adsorption columns, so that the oil fumes located in the filter pipe and within the electric field are adsorbed onto each of the adsorption columns.

8. The oil fume filtration device according to claim 7, characterized in that, The adsorption column is a graphite column.

9. The oil fume filtration device according to claim 7, characterized in that, The adsorption columns are arranged in an alternating pattern.

10. A range hood, characterized in that, It includes a range hood countertop, a fan unit, a heating device, and an oil fume filtration device as described in any one of claims 1-9; The fan unit, the heating unit, and the oil fume filter unit are located below the range hood platform; The fume filtration device is connected to the air outlet of the fan device, and is used to adsorb and filter the fume after it has been processed by the fan device before discharging it indoors or outdoors.

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