Smoke exhaust structure of oil smoke purifier

Abstract

The utility model relates to the technical field of oil fume purification, and particularly discloses a fume exhaust structure of an oil fume purifier. Comprising an upper box body and a lower box body, the oil fume purifier and the oil fume purifier are in sealed connection, so that the leakproofness of the oil fume in the purification process is ensured. A partition plate is arranged between the upper box body and the lower box body; the partition plate divides the upper box body and the lower box body into a circulation layer and a filtering layer, so that the lampblack can be filtered by the filtering assembly in the circulation process, and the purification effect is further improved. An oil fume through hole is formed in one side of the partition plate, and the circulating layer communicates with the filtering layer through the oil fume through hole; a plurality of smoke exhaust fans are arranged on the lower box body; the filtering assembly comprises a first filtering piece, a second filtering piece and a third filtering piece. Due to the arrangement of the oil fume through holes, effective communication between the circulating layer and the filtering layer is realized, and the oil fume can smoothly enter the filtering layer for purification treatment. The smoke exhaust fan is arranged, so that the oil smoke can quickly enter the circulation layer, and the oil smoke treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil fume purification, in particular to a fume exhaust structure of an oil fume purifier. Background Art

[0002] A fume purifier is a device used to purify kitchen fumes. It effectively removes grease particles, odors, and harmful gases from the fumes, improving indoor air quality and protecting human health. Common types of fume purifiers include centralized and household units. When choosing a fume purifier, consider factors such as filtration efficiency, noise level, and maintenance to ensure you're choosing the right one to address kitchen fume pollution. Regular cleaning and maintenance are also crucial to maintaining efficient operation.

[0003] In the food processing industry, the generation of cooking fumes is unavoidable, especially during high-temperature cooking processes like frying, grilling, and grilling. Fumes contain large amounts of grease, soot, and other harmful substances. If released directly into the atmosphere, they not only pollute the environment but also pose a potential threat to human health. Therefore, purifying cooking fumes is crucial. Traditional fume purifier exhaust systems often suffer from issues such as poor purification effectiveness, clogging, and difficulty in maintenance.

[0004] The patent "A Fume Exhaust Hood for High-Efficiency Fume Purification" (publication number CN217653941U, hereinafter referred to as prior art 1) discloses a high-efficiency fume purification structure. Prior art 1 uses a three-stage purification device. The first-stage purification device uses a curved plate structure set in a box, so that the oil fume passing through it repeatedly contacts the curved plate and adheres to the curved plate. The second-stage purification device uses an interception wheel, and the oil fume is attached to the spokes by rotating the interception wheel. The third-stage purification device is a UV lamp that sterilizes the oil fume. The curved plate structure used in prior art 1 is relatively staggered and vertically arranged, which will greatly hinder the circulation of oil fume. The oil fume is blocked in the box where the curved plate structure is set. The interception wheel of the second-stage purification device absorbs the oil fume through the spokes. If the width of the spokes is not enough, the adsorption effect will be poor, and the large cross density will affect the passage of oil fume. In addition, the disassembly, replacement and cleaning of the spokes are also relatively troublesome. The intercepting wheel in the prior art 1 is rotated by meshing of bevel gears, which causes a lot of oil and dirt to adhere to the bevel gears, affecting the purification environment and transmission efficiency. Utility Model Content

[0005] In view of this, an embodiment of the present invention provides a fume purifier exhaust structure to solve the problem that the components inside the purification device used in the prior art absorb more grease due to long-term work, thereby affecting the fume cleaning efficiency.

[0006] The embodiment of the utility model provides a fume purifier exhaust structure, comprising an upper box body and a lower box body; the upper box body and the lower box body are sealed and connected; a partition is provided between the upper box body and the lower box body; the partition is used to separate the upper box body and the lower box body into a circulation layer and a filter layer; a fume through-hole is provided on one side of the partition body, and the fume through-hole connects the circulation layer and the filter layer; a plurality of fume exhaust fans are provided on the lower box body; a filter assembly and a fume removal fan are provided in the filter layer; the filter assembly extends from one end where the fume through-hole is provided to the other end; the fume exhaust assembly is provided in the filter layer at an end away from the fume through-hole; the filter assembly comprises a first filter element, a second filter element and a third filter element; the second filter element and the third filter element are arranged in sequence; the second filter element and the third filter element are connected to the interior of the upper box body; a sterilization lamp is also provided between the filter assembly and the fume removal fan; the fume enters the circulation layer through the fume exhaust fan, and then enters the filter layer through the fume through-hole and is discharged by the fume removal fan.

[0007] Preferably, the circulation layer is inside the lower box; the filter layer is inside the upper box; a plurality of baffles are provided at intervals on the bottom of the filter layer; the second filter element and the third filter element are installed through the groove formed between two adjacent baffles.

[0008] Preferably, the first filter element is a flow-balancing net; the flow-balancing net covers the oil fume through-hole.

[0009] Preferably, the second filter element is an activated carbon plate; the activated carbon plate is arranged to cover the cross section of the filter layer; and a plurality of through holes are provided on the activated carbon plate.

[0010] Preferably, the third filter element is an electric field filter plate; at least two electric field filter plates are provided in the filter layer; the mounting frame of the electric field filter plate is made of stainless steel, and a plurality of electrode plates are provided in the mounting frame, and the electrode plates are made of aviation aluminum.

[0011] Preferably, the germicidal lamp is a UV germicidal lamp or an ultraviolet germicidal lamp; the germicidal lamp includes a plurality of lamps; and a gap is provided between two adjacent germicidal lamps.

[0012] Preferably, a first sewage collecting trough is provided on one side of the lower box body extending toward the bottom; a second sewage collecting trough is provided in the circulation layer on the top of the first sewage collecting trough; oil holes are provided at both ends of the second sewage collecting trough; the oil in the second sewage collecting trough is collected into the first sewage collecting trough through the oil holes.

[0013] Preferably, the side of the lower box body on which the smoke exhaust fan is mounted is tilted; the side of the lower box body on which the smoke exhaust fan is mounted collects oil and dirt into the first sump tank through its tilted setting.

[0014] Preferably, oil flow channels are provided on both sides of one side of the lower box body on which the smoke exhaust fan is installed; the oil flow channels are connected to the first sewage collecting tank; the oil flow channels on both sides of one side of the lower box body on which the smoke exhaust fan is installed gather the oil into the first sewage collecting tank through an inclined setting.

[0015] Preferably, both ends of the first sewage collecting tank are arranged in a closed manner; a sewage discharge pipe is provided at the first end of the first sewage collecting tank; and the sewage discharge pipe is closed by a sewage discharge plug.

[0016] The fume purifier exhaust structure provided by the utility model has the following beneficial effects:

[0017] This fume purifier features an upper and lower housing, sealed together to ensure a tight seal during the purification process, effectively preventing fume leakage and maintaining a clean and healthy kitchen environment. Furthermore, a partition separates the upper and lower housings into a circulation layer and a filtration layer, allowing fume to pass through each filter element during circulation, further enhancing purification effectiveness. The fume through-holes ensure effective communication between the circulation and filtration layers, ensuring smooth entry of fume into the filtration layer for purification. Furthermore, the exhaust fan ensures rapid entry of fume into the circulation layer, improving fume treatment efficiency. The first, second, and third filters are sequentially positioned to perform initial, deep, and fine filtration, achieving highly efficient fume purification. Furthermore, a germicidal lamp eliminates bacteria in the fume, further enhancing purification effectiveness and ensuring healthier exhaust air. This fume purifier has a high exhaust efficiency and can effectively remove harmful substances in the fume, providing a clean and healthy environment for food processing and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work, and these are all within the scope of protection of the present invention.

[0019] Figure 1 It is a schematic diagram of the internal structure of the front side of the exhaust structure of a fume purifier;

[0020] Figure 2 It is a schematic diagram of the internal structure of the exhaust structure of a fume purifier on the side;

[0021] Figure 3 It is a schematic diagram of the internal structure of the top of the exhaust structure of a fume purifier;

[0022] Parts and numbers in the picture:

[0023] 11-upper box, 111-filter layer, 112-smoke removal fan, 113-germicidal lamp, 114-baffle, 115-flow balancing net, 116-activated carbon plate, 117-electric field filter plate, 118-air outlet;

[0024] 21-lower box, 211-circulation layer, 212-exhaust fan, 213-first sewage collecting tank, 214-second sewage collecting tank, 215-oil hole, 216-oil flow channel, 217-drain pipe, 218-drain plug;

[0025] 31-partition, 311-oil smoke hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, elements defined by the phrase "comprises..." do not exclude the presence of additional identical elements in the process, method, article, or device that includes the elements. If there is no conflict, the embodiments of the present invention and the various features therein may be combined with each other and are all within the scope of protection of the present invention.

[0027] Example 1

[0028] See Figure 1The present invention provides a fume purifier exhaust structure, comprising an upper housing 11 and a lower housing 21, which are sealed together. A partition 31 is provided between the upper housing 11 and the lower housing 21. The partition 31 separates the interiors of the upper housing 11 and the lower housing 21 into a circulation layer 211 and a filtration layer 111. A fume through-hole 311 is provided on one side of the partition 31, connecting the circulation layer 211 and the filtration layer 111, thereby achieving smooth circulation of fume. The circulation layer 211 is primarily responsible for the initial introduction and circulation of fume, while the filtration layer 111 is responsible for deep filtration and purification of the fume.

[0029] Furthermore, a sealing material is used to seal the upper box body 11 and the lower box body 21 to ensure the sealing performance of the entire structure and prevent the leakage of oil smoke during the purification process. The leakage of oil smoke in the food processing and manufacturing environment will not only affect the production environment, but also affect the quality of the food. Therefore, it is particularly important to purify and discharge the oil smoke smoothly. At the same time, after the oil enters the interior of the oil fume purifier, it will directly contact the partition 31 inside the oil fume purifier and attach the grease to the partition 31. Therefore, the partition 31 is made of a material that is resistant to high temperature, corrosion, and grease to enhance its service life and stability. Furthermore, in the circulation layer 211, oil fume guide plates can also be set. These guide plates can initially guide the incoming oil fume, reduce the accumulation and blockage of oil fume in the circulation layer 211, and thus improve the purification efficiency.

[0030] See Figure 1 , the lower box body 21 is provided with a plurality of exhaust fans 212; the lower box body 21 is provided with a plurality of exhaust fans 212, which are responsible for drawing the oil smoke into the circulation layer 211. The filter layer 111 is provided with a filter assembly and a smoke removal fan 112; the filter assembly is extended from one end where the oil smoke through hole 311 is provided to the other end; the exhaust assembly is provided at the end of the filter layer 111 away from the oil smoke through hole 311. The circulation layer 211 and the filter layer 111 are connected through the oil smoke through hole 311 provided on the partition 31, and the oil smoke circulating in the circulation layer 211 is sent to the filter layer 111. After being sucked in by the exhaust fan 212, the oil smoke will circulate in the circulation layer 211. Since the exhaust fan 212 is a negative pressure fan, it can only draw in but cannot discharge; the oil smoke can only flow in the circulation layer 211 and float upwards. The oil smoke enters the filter layer 111 through the holes 311 provided on the partition 31 for filtration.

[0031] See Figure 3The filter assembly includes a first filter element, a second filter element and a third filter element; the second filter element and the third filter element are arranged in sequence; the second filter element and the third filter element are connected to the interior of the upper box body 11; a sterilization lamp 113 is also provided between the filter assembly and the smoke removal fan 112; the oil smoke enters the circulation layer 211 through the smoke exhaust fan 212, and then enters the filter layer 111 through the smoke through hole 311 and is discharged by the smoke removal fan 112 after circulation. After being sucked into the smoke exhaust fan 212, the oil smoke will circulate in the circulation layer 211, and enter the filter layer 111 through the smoke through hole 311 for deep filtration and purification. After purification, it is discharged through the air outlet 118 opened at the top of the upper box body 11 at a position adapted to the smoke removal fan 112.

[0032] See Figure 2 , the first filter element is a flow-equalizing net 115; the flow-equalizing net 115 covers the oil fume through-hole 311. It can evenly distribute the flow of oil fume and prevent the accumulation of oil fume in the filter layer 111. The second filter element is an activated carbon plate 116; the activated carbon plate 116 covers the cross-section of the filter layer 111; the activated carbon plate 116 is provided with a number of through holes. The activated carbon plate 116 has a strong adsorption capacity and can effectively remove odors and harmful substances in oil fume. The third filter element is an electric field filter plate 117; at least two electric field filter plates 117 are provided in the filter layer 111; the mounting frame of the electric field filter plate 117 is made of stainless steel, and a number of electrode plates are provided in the mounting frame, and the electrode plates are made of aviation aluminum. The electric field filter plate 117 further removes tiny particles and harmful substances in the oil fume through electrostatic action.

[0033] In oil fume purification equipment, the selection and layout of filters are crucial to its performance. This oil fume purification system utilizes three different filters: a flow-balancing net 115, an activated carbon plate 116, and an electric field filter plate 117. Together, they form a highly efficient oil fume filtration layer 111.

[0034] See Figure 2 The equalizing mesh 115 serves as the first filter element, covering the oil fume holes 311. Its unique mesh structure evenly distributes the oil fume flow, preventing it from accumulating within the filter layer 111. This not only improves the efficiency of oil fume filtration but also extends the service life of the filter layer 111. During the cooking process, the oil fume flow is often unstable, and the equalizing mesh 115 effectively balances this flow variation, ensuring uniform oil fume processing.

[0035] Activated carbon plate 116, serving as the second filter element, possesses a strong adsorption capacity for odors and harmful substances in cooking fumes. Tightly covering the cross-section of filter layer 111, activated carbon plate 116 features a dense distribution of through-holes on its surface, providing a path for cooking fumes to pass through. With its unique adsorption properties, activated carbon plate 116 effectively removes odor molecules and harmful substances from cooking fumes, further purifying the cooking fumes as they pass through filter layer 111.

[0036] See Figure 1 The electric field filter plate 117, as the third filter element, plays an indispensable role in the oil fume purification process. At least two electric field filter plates 117 are provided in the filter layer 111. These electric field filter plates 117 further remove tiny particles and harmful substances from the oil fume through electrostatic action. The mounting frame for the electric field filter plate 117 is made of stainless steel, which has excellent corrosion resistance and stability. Several electrode plates are installed in the mounting frame. These electrode plates are made of aviation aluminum, which is lightweight and high-strength. When the oil fume passes through the electric field filter plate 117, the electrostatic effect in the electric field filter plate 117 causes the tiny particles and harmful substances in the oil fume to be adsorbed on the electrode plates, thereby achieving deep purification. This oil fume purification system achieves efficient purification of oil fume by comprehensively utilizing multiple filter elements such as the flow equalizing net 115, activated carbon plate 116, and electric field filter plate 117. In actual application, the system can effectively remove odors, harmful substances, and tiny particles from oil fume, significantly improving the air quality in food processing environments.

[0037] See Figure 1 , the germicidal lamp 113 is a UV germicidal lamp or an ultraviolet germicidal lamp 113; the germicidal lamp 113 includes a plurality of lamps; and there is a gap between two adjacent germicidal lamps 113. It can effectively kill bacteria and viruses in oil smoke and ensure the safety of the purified air quality. The germicidal lamp 113, which we often call the UV germicidal lamp 113 or ultraviolet germicidal lamp 113, is a device that uses ultraviolet radiation to kill microorganisms. This type of germicidal lamp 113 is widely used in many fields such as medical care, food, and water treatment, and its high efficiency and environmental protection characteristics have been widely recognized. In the field of oil fume purification, this type of germicidal lamp 113 has also demonstrated a powerful effect.

[0038] See Figure 1Specifically, this germicidal lamp 113 typically consists of several lamp tubes, each emitting intense ultraviolet light. These lamp tubes are arranged in a specific layout, with appropriate spacing between adjacent lamps, to ensure that the ultraviolet light evenly irradiates the entire fume treatment area. As the fume passes through the germicidal lamp 113 area, the ultraviolet light effectively kills bacteria and viruses within it, thereby purifying the air. The operating principle of this germicidal lamp 113 is primarily based on the bactericidal effect of ultraviolet light. Ultraviolet light destroys the DNA structure of microorganisms, rendering them unable to reproduce, thereby achieving its killing effect. The ultraviolet germicidal lamp 113 can quickly and effectively kill bacteria and viruses in the fume, thereby ensuring safe air quality after purification. This germicidal lamp 113 is also highly environmentally friendly. Compared to traditional chemical disinfection methods, the ultraviolet germicidal lamp 113 does not require the addition of any chemicals, thus preventing secondary pollution and contamination of food processing. Furthermore, due to its long service life and relatively low maintenance costs, the ultraviolet germicidal lamp 113 offers high economic benefits in practical applications.

[0039] In a specific embodiment, the germicidal lamp 113 has been widely used in places with large fume emissions, such as restaurants and food processing. By installing the ultraviolet germicidal lamp 113, these places can effectively kill bacteria and viruses in the fume, protecting the health of workers and the hygiene of the working environment.

[0040] Example 2

[0041] See Figure 1 The present invention provides a fume purifier exhaust structure. This device primarily consists of an upper housing 11 and a lower housing 21, which work together to achieve efficient and convenient fume filtration and exhaust. The circulation layer 211, located within the lower housing 21, is responsible for the important task of fume circulation; while the filtration layer 111, located within the upper housing 11, is responsible for filtering the fume layer by layer, ensuring that the exhausted air is clean and pollution-free.

[0042] See Figure 3 The bottom of filter layer 111 is cleverly designed with a series of evenly spaced baffles 114. These baffles 114 not only enhance the structural stability of filter layer 111 but also facilitate the installation of the second and third filter elements. The slots formed between these baffles 114 allow for easy installation of the filter elements, ensuring that the oil smoke can pass smoothly through filter layer 111 and be fully filtered and purified.

[0043] Furthermore, the circulation layer 211 is located within the lower housing 21; the filter layer 111 is located within the upper housing 11; a plurality of baffles 114 are spaced apart at the bottom of the filter layer 111; the second and third filter elements are mounted via grooves formed between adjacent baffles 114. A first sump 213 is provided on one side of the lower housing 21, extending toward the bottom; a second sump 214 is provided within the circulation layer 211 on top of the first sump 213; oil holes 215 are provided at both ends of the second sump 214; oil in the second sump 214 is collected into the first sump 213 through the oil holes 215.

[0044] See Figure 1 or Figure 3 The side of the lower housing 21 where the exhaust fan 212 is mounted is tilted. This tilted design not only improves the stability of the entire device but also effectively collects oil and dirt into the first sump 213. The tilted side of the lower housing 21 where the exhaust fan 212 is mounted collects oil and dirt into the first sump 213. Oil and dirt flow channels 216 are provided on both sides of the side of the lower housing 21 where the exhaust fan 212 is mounted; these flow channels 216 are connected to the first sump 213. Oil and dirt flow channels 216 are also provided on both sides of this side, connecting to the first sump 213. These flow channels further guide the oil and dirt into the sump, ensuring that the oil does not scatter freely, thereby maintaining the cleanliness and hygiene of the entire device. The oil and dirt flow channels 216 on both sides of the side of the lower housing 21 where the exhaust fan 212 is mounted collect the oil and dirt into the first sump 213 through their tilted configuration. The first sump 213 is closed at both ends to prevent oil and dirt from leaking. A drain pipe 217 is provided at the first end of the first sump 213; this drain pipe 217 is closed by a drain plug 218. The drain pipe 217 of the first sump 213 facilitates regular cleaning of oily waste. To ensure a tight seal, a drain plug 218 is used to close the drain pipe 217, preventing oil leakage during the draining process.

[0045] See Figure 3A first sump 213 extending toward the bottom is designed on one side of the lower housing 21. This sump collects all oily dirt generated during the filtration process. A second sump 214 is also located within the circulation layer 211 above the first sump 213. Oil holes 215 are located at both ends of the second sump 214, allowing oily dirt generated during the filtration process to flow smoothly through these holes 215 and into the first sump 213. The first sump 213 primarily collects oily dirt directly attached to the panel where the exhaust fan 212 is mounted. Since this panel is in direct contact with the oily smoke, the likelihood of oily dirt adhering is greatest. Therefore, oily dirt flow channels 216 are provided on both sides of the first sump 213 to collect the oily dirt and facilitate cleaning. Once the oily smoke enters the circulation chamber, it adheres to the interior. The inclined surfaces allow the oily dirt to flow into the second sump 214, where it then flows through the oil holes 215 in the second sump 214 and into the first sump 213, facilitating cleaning.

[0046] The fume purifier's exhaust system effectively filters and removes cooking fumes. Whether used in food production or in the home kitchen, it performs effectively, bringing convenience and comfort to our lives. Furthermore, its ease of installation and maintenance significantly reduces operating costs, allowing more people to enjoy its convenience.

[0047] Example 3

[0048] See Figure 1 The present invention provides a fume purifier exhaust structure. By providing a circulation layer 211 and a filter layer 111, the fume purifier achieves efficient filtration and purification of fume. The circulation layer 211 is responsible for the circulation of fume, while the filter layer 111 effectively removes harmful substances from the fume through layer-by-layer filtration, ensuring that the exhausted air is clean and pollution-free. This design not only improves the efficiency of fume purification, but also protects the health of workers and the sanitation of the working environment.

[0049] See Figure 3 The oil fume purifier effectively collects and cleans oil by installing a first sump 213 and a second sump 214 inside the lower housing 21, as well as a baffle 114 inside the upper housing 11. The first sump 213 collects oil directly attached to the panel where the exhaust fan 212 is mounted, while the second sump 214 collects oil from the circulation layer 211 into the first sump 213 through the oil hole 215. This design not only facilitates the cleaning of oil, but also prevents it from being scattered, keeping the entire device clean and hygienic.

[0050] Furthermore, the fume purifier exhaust structure provided by the present invention not only efficiently filters and purifies fume, but also effectively collects and cleans oily contaminants, while also being easy to install and maintain. Its application will provide a safer and healthier working environment for restaurants, food processing facilities, and other places with high fume emissions, while also bringing greater convenience and comfort to people's lives.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fume purifier exhaust structure, characterized in that: The invention comprises an upper box body (11) and a lower box body (21); the upper box body (11) and the lower box body (21) are sealed and connected; a partition (31) is provided between the upper box body (11) and the lower box body (21); the partition (31) separates the upper box body (11) and the lower box body (21) into a circulation layer (211) and a filter layer (111); a fume through hole (311) is provided on one side of the partition (31), and the fume through hole (311) connects the circulation layer (211) and the filter layer (111); The lower box (21) is provided with a plurality of smoke exhaust fans (212); a filter assembly and a smoke removal fan (112) are provided in the filter layer (111); the filter assembly is extended from one end where the oil smoke through hole (311) is provided to the other end; the smoke exhaust assembly is provided in the filter layer (111) at one end away from the oil smoke through hole (311); The filter assembly comprises a first filter element, a second filter element and a third filter element; the second filter element and the third filter element are arranged in sequence; the second filter element and the third filter element are connected to the interior of the upper box (11); a sterilization lamp (113) is also provided between the filter assembly and the smoke removal fan (112); the oil smoke enters the circulation layer (211) through the smoke exhaust fan (212), and then enters the filter layer (111) through the oil smoke through hole (311), circulates, and is discharged by the smoke removal fan (112).

2. The fume purifier exhaust structure according to claim 1, characterized in that: The circulation layer (211) is inside the lower box (21); the filter layer (111) is inside the upper box (11); a plurality of baffles (114) are provided at intervals at the bottom of the filter layer (111); the second filter element and the third filter element are installed through a groove formed between two adjacent baffles (114).

3. The fume purifier exhaust structure according to claim 1, characterized in that: The first filter element is a flow-balancing net (115); the flow-balancing net (115) covers the oil smoke through hole (311).

4. The fume exhaust structure of a fume purifier according to claim 1, characterized in that: The second filter element is an activated carbon plate (116); the activated carbon plate (116) covers the cross section of the filter layer (111); and a plurality of through holes are provided on the activated carbon plate (116).

5. The fume exhaust structure of a fume purifier according to claim 2, characterized in that: The third filter element is an electric field filter plate (117); at least two electric field filter plates (117) are provided in the filter layer (111); a mounting frame of the electric field filter plate (117) is made of stainless steel, and a plurality of electrode plates are provided in the mounting frame, and the electrode plates are made of aviation aluminum.

6. The fume exhaust structure of a fume purifier according to claim 1, characterized in that: The germicidal lamp (113) is a UV germicidal lamp or an ultraviolet germicidal lamp (113); the germicidal lamp (113) comprises a plurality of lamps; and a gap is provided between two adjacent germicidal lamps (113).

7. The fume exhaust structure of a fume purifier according to claim 1, characterized in that: A first dirt collecting trough (213) is provided on one side of the lower box body (21) extending toward the bottom; a second dirt collecting trough (214) is provided in the circulation layer (211) on the top of the first dirt collecting trough (213); oil holes (215) are provided at both ends of the second dirt collecting trough (214); and the oil in the second dirt collecting trough (214) is collected into the first dirt collecting trough (213) through the oil holes (215).

8. The fume exhaust structure of a fume purifier according to claim 7, characterized in that: The side of the lower box (21) on which the smoke exhaust fan (212) is mounted is tilted; the side of the lower box (21) on which the smoke exhaust fan (212) is mounted collects oil and dirt into the first dirt collecting tank (213) through its tilted setting.

9. The fume purifier exhaust structure according to claim 8, characterized in that: Oil and dirt flow channels (216) are provided on both sides of one side of the lower box (21) on which the smoke exhaust fan (212) is installed; the oil and dirt flow channels (216) are connected to the first dirt collecting tank (213); the oil and dirt flow channels (216) on both sides of one side of the lower box (21) on which the smoke exhaust fan (212) is installed are arranged to be inclined so as to collect the oil and dirt into the first dirt collecting tank (213).

10. The fume exhaust structure of a fume purifier according to claim 7, characterized in that: Both ends of the first sewage collecting tank (213) are arranged in a closed manner; a sewage discharge pipe (217) is provided at the first end of the first sewage collecting tank (213); and the sewage discharge pipe (217) is closed by a sewage discharge plug (218).

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