A pp fume hood with modular filtration assembly
Patent Information
- Application Number
- CN202522463506.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-20
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-20
AI Technical Summary
The existing fume hood filter components are mostly fixed integrated structures, which are difficult to adapt to the diverse exhaust gas treatment needs of laboratories. Moreover, filter replacement and maintenance are cumbersome and pose a risk of exhaust gas leakage.
A modular filtration assembly is designed, comprising an activated carbon adsorption assembly, a UV treatment mechanism, and a fine filtration assembly. It employs a sliding structure and track design to facilitate quick replacement of filter media and to treat exhaust gas through a multi-stage purification process.
The independent and integrated design of the filter components has been achieved, which improves the ease of use and purification effect, reduces the difficulty of maintenance and the risk of exhaust gas leakage, and ensures the thoroughness of purification.
Smart Images
Figure CN224926700U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fume hood technology, and more specifically, to a PP fume hood with modular filter components. Background Technology
[0002] Fume hoods are one of the core safety devices in laboratories, widely used in fields such as chemistry, biology, and medicine. Their core function is to rapidly collect toxic and harmful gases, volatile organic solvents, acid and alkali mists, and other pollutants generated during experiments, preventing direct contact with operators and preventing the spread of pollutants in the experimental environment, thus protecting the health of laboratory personnel and ensuring environmental safety. Most existing fume hoods are made of chemically resistant materials and are typically equipped with an operating table, a height-adjustable enclosed baffle, and an air extraction device. A fan generates negative pressure to draw out pollutants, making them an indispensable safety protection facility in laboratories.
[0003] With increasingly stringent environmental regulations and higher laboratory safety standards, simply extracting and directly discharging pollutants through fume hoods is no longer sufficient. The extracted exhaust gases must be purified before release. Therefore, existing fume hoods are typically equipped with filtration systems to treat the exhaust gases. Common filtration methods include activated carbon adsorption and UV photolysis. Activated carbon adsorption is mainly used to remove large molecular organic pollutants and odors, while UV photolysis uses ultraviolet light to break down the molecular structure of organic pollutants. Some fume hoods combine these two methods to enhance the purification effect.
[0004] However, most filter components are fixed integrated structures. During experiments, the generated exhaust gases are diverse, so the treatment methods vary. They are difficult to adapt to laboratory fume hoods. In addition, the lack of modular design makes filter replacement and maintenance cumbersome, and there is a risk of exhaust gas leakage during disassembly and assembly.
[0005] Therefore, it is necessary for the inventors to design a new PP fume hood with modular filter components to overcome the above problems. Summary of the Invention
[0006] The main purpose of this application is to provide a PP fume hood with modular filter components to solve the problems of fume hoods on the market that are difficult to adapt to laboratory use and the cumbersome operation of filter replacement and maintenance.
[0007] To achieve the above objectives, this application provides a PP fume hood with a modular filter assembly, including a cabinet body with an operating table on the cabinet body; a movable baffle for closing the operating table; an air intake hood on the operating table; a support frame at the bottom of the cabinet body; an exhaust fan on the support frame; an exhaust pipe connected to the input end of the exhaust fan, the other end of the exhaust pipe connected to the output end of the modular filter assembly, and the input end of the modular filter assembly connected to the output end of the air intake hood; The module filtration assembly includes: a housing disposed on the support frame; a flow equalization plate disposed inside the housing for equalizing the flow of exhaust gas; an activated carbon adsorption assembly slidably disposed inside the housing; a UV treatment mechanism disposed inside the housing and located below the activated carbon adsorption assembly; and a fine filtration assembly disposed inside the housing and located below the UV treatment mechanism.
[0008] Preferably, the top of the cabinet is provided with a ventilation hood, which is connected to an external fan through a ventilation pipe.
[0009] Preferably, the top of the cabinet is provided with a transmission mechanism, which is used to drive the baffle to rise and fall.
[0010] Preferably, the activated carbon adsorption assembly includes a fixed frame; and several activated carbon plates spaced apart on the fixed frame, each activated carbon plate having several through holes.
[0011] Preferably, the inner wall of the housing is provided with a track, and the two sides of the fixed frame are provided with sliding members that are slidably connected to the track.
[0012] Preferably, the UV treatment mechanism includes: a fixing member disposed on the inner wall of the housing; and a plurality of UV lamp plates fixed by the fixing member.
[0013] Preferably, the fine filtration assembly includes a ceramic mesh fixed inside the housing, the ceramic mesh being coated with a titanium dioxide coating.
[0014] Preferably, the fine filtration assembly includes a modified activated carbon layer wrapped in nonwoven fabric, the nonwoven fabric being impregnated with sodium carbonate.
[0015] Preferably, the activated carbon adsorption component and the fine filtration component are provided with a cover plate for sealing the housing, and a sealing element is provided at the connection between the cover plate and the housing.
[0016] This utility model provides a PP fume hood with modular filter components. Compared with existing technologies, its advantages are as follows: By setting up modular filter components, the independent and integrated design of each filter unit is realized, greatly improving ease of use and purification effect. The activated carbon adsorption component adopts a pull-out sliding structure, combined with the track and sliding part design, which facilitates quick replacement of activated carbon plates, reduces maintenance difficulty, and reduces the risk of exhaust gas leakage during disassembly and assembly; the UV treatment mechanism and the fine filter component form a multi-stage purification process, in which the fine filter component can be adapted to different types of exhaust gas, effectively removing small molecule organic matter, residual acid and alkali substances, and UV photolysis intermediate products, ensuring thorough purification. Attached Figure Description
[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a front view schematic diagram of the structure of this utility model; Figure 3 This is a front view cross-sectional schematic diagram of the modular filter assembly of this utility model; Figure 4 This is a front view schematic diagram of the modular filter assembly of this utility model.
[0018] The components include: 1. Cabinet; 2. Operating table; 3. Baffle; 4. Ventilation hood; 5. Transmission mechanism; 6. Suction hood; 7. Exhaust fan; 8. Exhaust pipe; 9. Shell; 10. Flow equalization plate; 11. Fixed frame; 12. Activated carbon plate; 13. Sliding parts; 14. Track; 15. UV treatment mechanism; 16. Fine filter assembly; 17. Cover plate. Detailed Implementation
[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0020] It should be noted that the terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0023] In addition, the term "multiple" should mean two or more.
[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0025] Example 1, as Figures 1-4As shown, a PP fume hood with modular filtration components includes a cabinet body 1 made of PP material, which has good chemical corrosion resistance and can adapt to various corrosive environments such as acids and alkalis in laboratories. The cabinet body 1 is equipped with an operating table 2, which is a horizontally arranged flat structure used for placing experimental equipment and conducting experiments. The cabinet body 1 also has a movable baffle 3 for sealing the operating table 2. The movable baffle 3 is made of transparent material, allowing operators to easily observe the experimental situation inside the operating table 2 and also enabling the sealing of the operating table 2 during experiments to reduce the leakage of exhaust gases. The operating table 2 is equipped with an exhaust hood 6, which has a funnel-shaped or arc-shaped structure to efficiently collect toxic exhaust gases generated during experiments. The bottom of the cabinet body 1 is equipped with a support frame, which is a frame structure used to support and fix the exhaust fan 7 and the modular filtration components, ensuring the stability of the overall structure.
[0026] The support frame is equipped with an exhaust fan 7, which provides power for the flow of exhaust gas. The input end of the exhaust fan 7 is connected to an exhaust pipe 8, which is made of corrosion-resistant PP pipe or other chemical corrosion-resistant pipe material. The other end of the exhaust pipe 8 is connected to the output end of the module filter assembly, and the input end of the module filter assembly is connected to the output end of the suction hood 6, forming an exhaust gas flow path of suction hood 6 → module filter assembly → exhaust pipe 8 → exhaust fan 7, ensuring that the exhaust gas generated in the operating table 2 can be discharged after being filtered in sequence.
[0027] The top of the cabinet 1 is equipped with a ventilation hood 4, the opening of which faces the inside of the cabinet 1. The ventilation hood 4 is connected to an external fan through a ventilation pipe. The external fan can assist the exhaust fan 7 in enhancing the airflow circulation inside the cabinet 1. While the exhaust fan 7 mainly extracts the exhaust gas near the operating table 2, the ventilation hood 4 can extract the small amount of exhaust gas that may be trapped at the top of the cabinet 1, further preventing the accumulation of exhaust gas inside the cabinet and improving the overall ventilation effect.
[0028] A transmission mechanism 5 is provided on the top of the cabinet 1. This transmission mechanism 5 is used to drive the baffle 3 to rise and fall, thereby adjusting the opening and closing degree of the baffle 3. The transmission mechanism 5 can adopt a motor-driven screw-slider structure, that is, the motor is fixed to the top of the cabinet 1, the output shaft of the motor is connected to the screw, and the slider fixedly connected to the baffle 3 is sleeved on the screw. When the motor rotates forward and reverse, it drives the screw to rotate, thereby driving the slider and the baffle 3 to move up and down. Alternatively, a chain drive structure can be adopted, in which the motor drives the chain to move, and the chain is connected to the baffle 3 to realize the raising and lowering of the baffle 3, ensuring that the baffle 3 rises and falls smoothly, and can fit tightly against the cabinet 1 when closed, enhancing the sealing of the operating table 2. The attached figure shows the chain method.
[0029] The modular filter assembly includes a housing 9 mounted on a support frame. The housing 9 is made of PP material, the same material as the cabinet 1, and has good corrosion resistance and structural strength. Inside the housing 9 is a flow equalization plate 10 for uniform flow of exhaust gas. The flow equalization plate 10 is a flat plate with several evenly distributed through holes and is located at the input end of the housing 9. When exhaust gas enters the housing 9 from the suction hood 6, it is dispersed through the through holes of the flow equalization plate 10, so that the exhaust gas flows evenly to the subsequent filter assembly, avoiding insufficient filtration due to excessive local airflow.
[0030] An activated carbon adsorption assembly is slidably mounted inside the housing 9. A track 14 extends along the depth of the housing 9 from its inner wall. Sliding parts 13, slidably connected to the track 14, are located on both sides of the fixed frame 11 of the activated carbon adsorption assembly. The cooperation between the sliding parts 13 and the track 14 allows the activated carbon adsorption assembly to be pulled in and out from one side of the housing 9, facilitating periodic replacement or maintenance. The activated carbon adsorption assembly includes a fixed frame 11 made of corrosion-resistant plastic or metal. Several spaced activated carbon plates 12 are mounted on the fixed frame 11. These plates are made of pressed granular activated carbon and have several through holes. When exhaust gas passes through these holes, large molecular organic waste gases and odors can be adsorbed by the activated carbon. The spaced activated carbon plates 12 increase the contact area and contact time between the exhaust gas and the activated carbon, improving the adsorption effect.
[0031] A UV treatment mechanism 15 is provided inside the housing 9 and below the activated carbon adsorption component. The UV treatment mechanism 15 includes a fastener provided on the inner wall of the housing 9. The fastener can be a buckle, bolt or slot structure. Several UV lamp plates are fixed by the fastener. The UV lamp plates are evenly distributed along the width direction of the housing 9. The UV lamps on the UV lamp plates can emit ultraviolet light of a specific wavelength to decompose some of the organic waste gas remaining after treatment by the activated carbon adsorption component. By destroying the molecular structure of organic matter, it decomposes it into small molecules.
[0032] A fine filter assembly 16 is provided inside the housing 9 and below the UV treatment mechanism 15 for deep purification of pollutants that remain after the previous treatment.
[0033] The fine filter assembly 16 includes a ceramic mesh fixed inside the housing 9. The ceramic mesh is fixed to the inner wall of the housing 9 by snap-fit or bolts. The ceramic mesh has a porous structure and its surface is coated with a titanium dioxide coating. When the exhaust gas treated by the UV treatment mechanism 15 flows through the ceramic mesh, the titanium dioxide coating is excited to produce a photocatalytic reaction under the ultraviolet light emitted by the UV lamp panel. This reaction can further oxidize and decompose the residual small organic molecules and intermediate products after UV treatment into carbon dioxide and water. At the same time, it can decompose the small amount of ozone that may be generated during the UV treatment process, thereby improving the thoroughness of exhaust gas purification.
[0034] The activated carbon adsorption component and the fine filter component 16 are provided with a cover plate 17 for sealing the housing 9. The cover plate 17 is made of the same material as the housing 9. One side of the cover plate 17 can be connected to the housing 9 by a hinge, and the other side is provided with a locking structure for easy opening and closing. A sealing element is provided at the connection between the cover plate 17 and the housing 9. The sealing element is made of aging-resistant silicone sealing ring or rubber gasket to ensure the sealing of the inside of the housing 9 when the cover plate 17 is closed, and to prevent unfiltered exhaust gas from leaking from the connection.
[0035] In Example 2, the fine filter assembly 16 includes a modified activated carbon layer wrapped in non-woven fabric. The modified activated carbon layer is composed of activated carbon modified for small molecule organic matter or specific pollutants. The non-woven fabric is made of a chemically resistant material and is impregnated with sodium carbonate. When waste gas flows through the fine filter assembly 16, the modified activated carbon layer can adsorb residual small molecule organic waste gas, while the impregnated sodium carbonate can neutralize any acidic substances that may remain in the waste gas, thereby removing acidic pollutants. The non-woven fabric can both fix the modified activated carbon and prevent its particles from falling off, and allow the waste gas to pass through the modified activated carbon layer evenly, ensuring the purification effect.
[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A PP fume hood with modular filter components, characterized in that: Includes a cabinet (1) on which an operating table (2) is provided; a movable baffle (3) for closing the operating table (2); an air suction hood (6) on the operating table (2); a support frame at the bottom of the cabinet (1); an exhaust fan (7) on the support frame; an exhaust pipe (8) connected to the input end of the exhaust fan (7); the other end of the exhaust pipe (8) connected to the output end of the module filter assembly; and the input end of the module filter assembly connected to the output end of the air suction hood (6). The module filtration assembly includes: a housing (9) disposed on the support frame; a flow equalization plate (10) disposed inside the housing (9) for equalizing the flow of exhaust gas; an activated carbon adsorption assembly slidably disposed inside the housing (9); a UV treatment mechanism (15) disposed inside the housing (9) and located below the activated carbon adsorption assembly; and a fine filtration assembly (16) disposed inside the housing (9) and located below the UV treatment mechanism (15).
2. The PP fume hood with modular filter assembly according to claim 1, characterized in that: The top of the cabinet (1) is provided with a ventilation hood (4), which is connected to an external fan through a ventilation pipe.
3. The PP fume hood with modular filter assembly according to claim 1, characterized in that: The top of the cabinet (1) is provided with a transmission mechanism (5), which is used to drive the baffle (3) to rise and fall.
4. The PP fume hood with modular filter assembly according to claim 1, characterized in that: The activated carbon adsorption assembly includes a fixed frame (11); and several activated carbon plates (12) spaced apart on the fixed frame (11), with several through holes on the activated carbon plates (12).
5. The PP fume hood with modular filter assembly according to claim 4, characterized in that: The inner wall of the housing (9) is provided with a track (14), and the two sides of the fixed frame (11) are provided with sliding parts (13) that are slidably connected to the track (14).
6. The PP fume hood with modular filter assembly according to claim 1, characterized in that: The UV treatment mechanism (15) includes: a fixing member disposed on the inner wall of the housing (9); and a plurality of UV lamp plates fixed by the fixing member.
7. The PP fume hood with modular filter assembly according to claim 1, characterized in that: The fine filtration assembly (16) includes a ceramic mesh fixed inside the housing (9), the ceramic mesh being coated with a titanium dioxide coating.
8. The PP fume hood with modular filter assembly according to claim 1, characterized in that: The fine filtration assembly (16) includes a modified activated carbon layer wrapped in nonwoven fabric, the nonwoven fabric being impregnated with sodium carbonate.
9. The PP fume hood with modular filter assembly according to claim 1, characterized in that: The activated carbon adsorption assembly and the fine filtration assembly (16) are provided with a cover plate (17) for sealing the housing (9), and a sealing element is provided at the connection between the cover plate (17) and the housing (9).