Multifunctional activated carbon purification device installed at air outlet of range hood

Abstract

This invention discloses a multifunctional activated carbon purification device installed at the air outlet of a range hood. It includes a square box with an air inlet at the bottom that is sealed to the range hood outlet, and an air outlet at the top that can be either directly open or sealed to a common flue. Inside the square box, along the airflow direction, are sequentially arranged a pre-filter, a middle-layer adsorption component, and a post-filter. Through this three-stage progressive purification structure, the entire process of purifying oily fumes is achieved, covering the complete stages of intercepting large particles, adsorbing harmful gases, and filtering fine particles. Furthermore, this device can simultaneously remove various impurities from the fumes, including large oil mist particles, solid oil stains, volatile organic gases, and various odor molecules. The purified airflow is clean, odorless, and free of fine oil mist residue, preventing secondary pollution of the surrounding environment from the source. The purification effect is more comprehensive and thorough.

Description

Technical Field

[0001] This invention belongs to the technical field of oil fume purification equipment, specifically relating to a multifunctional activated carbon purification device installed at the air outlet of a range hood. Background Technology

[0002] Range hoods are essential ventilation devices in kitchens, but the exhaust fumes they discharge directly into public flues or indoor / outdoor spaces contain a large amount of oil mist, solid oil particles, volatile organic compounds (VOCs), and various odor molecules. This not only causes air pollution in the surrounding environment but also easily leads to odor backflow, affecting the indoor living environment.

[0003] Existing range hoods are equipped with simple filtration devices, but most of them only use a single-layer filter for physical filtration, which can only intercept a small amount of large oil mist particles and cannot effectively adsorb odor molecules and harmful gases, resulting in poor purification effects. Some purification devices with activated carbon adsorption have problems such as the activated carbon layer being easily blocked by large oil mist particles and the airflow staying in the carbon layer for a short time, resulting in insufficient adsorption. At the same time, they lack an effective post-filter structure, so small oil mist particles will still be discharged, which cannot fundamentally solve the problems of oil fume pollution and odor backflow. Summary of the Invention

[0004] The purpose of this invention is to provide a multifunctional activated carbon purification device installed at the air outlet of a range hood to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional activated carbon purification device installed at the air outlet of a range hood, comprising:

[0006] The square box has an air inlet at one bottom end that is sealed to the air outlet of the range hood, and an air outlet at one top end that can be directly opened or sealed to the common flue. The square box contains a pre-coarse filter assembly, a middle adsorption assembly, and a post-fine filter assembly arranged sequentially along the airflow direction. The pre-coarse filter assembly, the middle adsorption assembly, and the post-fine filter assembly are all detachably connected to the square purification shell.

[0007] The front end of the square box is detachably provided with a front cover plate, which is fixed to the square box by hand-tightening bolts.

[0008] Preferably, the pre-filter assembly includes two sets of flow-guiding and diversion side plates. The flow-guiding and diversion side plates are detachably installed on the inner walls of both sides of the square box to form a tortuous airflow channel. The function is to buffer and divert the oil fume airflow, intercept large particulate impurities, and avoid clogging and damage to the core purification components.

[0009] Preferably, the flow guiding and diverting side plate is connected to two sets of inclined flow guiding plates to optimize the airflow path, enhance the buffering and diverting effect, improve the interception efficiency of large particulate impurities, and make the airflow distribution more uniform.

[0010] Preferably, the middle layer adsorption component includes an arched filter frame, which is detachably disposed between the tops of the two sets of flow diversion side plates. A honeycomb activated carbon filter element is detachably disposed inside the arched filter frame. The honeycomb activated carbon filter element is 20 mm thick and made of porous activated carbon material. It is used to support and fix the activated carbon filter element, extend the airflow residence time, efficiently adsorb harmful gases and odors, and facilitate filter element replacement.

[0011] Preferably, a lower cover plate is fixed to one bottom end of the square box body by screws, and an upper cover plate is fixed to one top end by screws. The bottom of the lower cover plate is connected to a multi-diameter adapter to seal the upper and lower ends of the box body. The multi-diameter adapter can be adapted to the air outlets of different specifications of range hoods, reducing the difficulty of installation.

[0012] Preferably, the post-filter assembly is a HEPA medium-efficiency filter element. The HEPA medium-efficiency filter element has a bag or plate structure and is detachably installed inside the upper cover. The filter material is made of dense fiber material and has a weak static electricity, which can deeply filter small particles, prevent the backflow of odors from the public flue, and is easy to clean and replace, adapting to different purification needs.

[0013] Preferably, the air inlet and outlet of the square box are equipped with sealing rings to enhance the sealing performance of the device, prevent oil fumes from leaking at the connection, and ensure the purification effect and user experience.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) Through a three-stage progressive purification structure, the entire process of oil fume purification is realized, covering the complete links of large particle impurity interception, harmful gas adsorption, and fine particle filtration. This makes up for the technical defects of existing single-layer filter screens that can only intercept large particles of oil mist. This device can simultaneously remove various impurities in oil fume, including large particles of oil mist, solid oil stains, volatile organic gases and various odor molecules. The purified airflow is clean and odorless, with no fine oil mist residue. It avoids secondary pollution of the surrounding environment caused by oil fume emissions from the source, and the purification effect is more comprehensive and thorough.

[0016] (2) The middle layer of the purification system uses an arched honeycomb activated carbon filter element, combined with a front-mounted tortuous airflow channel design, which can effectively extend the residence time of the airflow in the activated carbon adsorption layer, allowing the adsorption reaction to be more complete and removing the pungent odor at the end of the exhaust to the maximum extent, thus fundamentally solving the problem of oil fume odor pollution. The rear-mounted HEPA medium-efficiency filter element has both electrostatic adsorption and physical interception functions, which can further purify the tiny particles in the airflow and improve the purification accuracy, and can also effectively prevent odors and impurities in the public flue from flowing back into the room.

[0017] (3) The bottom cover of the device is connected to a multi-diameter adapter, which can be flexibly adapted to the air outlet of different specifications and models of range hoods. No additional modification is required to the range hood or the device itself. The installation process is simple and convenient, reducing the installation difficulty. At the same time, both the air inlet and the air outlet are equipped with sealing rings, which can effectively improve the sealing performance of the device, prevent oil fume and exhaust gas from leaking at the connection, avoid indoor pollution, and improve the user experience while ensuring the purification effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the present invention after the square box body has been disassembled.

[0021] In the diagram: 1. Square box; 2. Lower cover plate; 3. Upper cover plate; 4. Multi-diameter adapter; 5. HEPA medium-efficiency filter element; 6. Honeycomb activated carbon filter element; 7. Front cover plate; 8. Hand-tightening bolt; 9. Flow diversion side plate; 10. Flow guide plate; 11. Arched filter frame. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0024] This invention provides, for example Figure 1-3 The multi-functional activated carbon purification device shown is installed at the air outlet of a range hood, comprising:

[0025] The square box 1 serves as the supporting base for the entire purification device, integrating various purification components and ensuring the orderly flow of oil fume airflow. One end of the box has an air inlet that is sealed to the exhaust vent of the range hood, precisely connecting to the exhaust fumes and preventing leakage. The top end has an air outlet that can be either directly open or sealed to a common flue, adapting to different exhaust scenarios and ensuring compliant emission of purified airflow. Inside the square box 1, along the direction of oil fume airflow, are sequentially arranged a pre-coarse filter, a middle-layer adsorption component, and a post-fine filter. These three components work together to form a three-stage progressive purification structure, respectively intercepting large particles, adsorbing harmful gases and odors, and finely filtering small particles. Furthermore, the pre-coarse filter, middle-layer adsorption component, and post-fine filter are all detachably connected to the square purification shell 1, facilitating disassembly, cleaning, replacement, and maintenance of the components, ensuring long-term stable purification performance of the device.

[0026] The front end of the square box 1 is detachably provided with a front cover plate 7. The front cover plate 7 is screwed to the square box 1 by a hand-tightening bolt 8. The front cover plate can be disassembled and installed without the need for special tools, providing convenient operating space for the inspection and maintenance of various purification components in the box, while also sealing the box and preventing oil fume leakage.

[0027] The pre-filter assembly includes two sets of flow-diverting side plates 9, which are detachably mounted on the inner walls of both sides of the square box 1. Their core function is to cooperate with the subsequent flow-diverting structure to form a tortuous airflow channel, which buffers and diverts the high-speed oil fume airflow discharged from the range hood, prolonging the residence time of the airflow in the pre-filter stage. At the same time, through the physical blocking effect, it effectively intercepts large particles of oil mist, solid oil particles, water droplets and other impurities carried in the airflow, preventing such impurities from entering the subsequent core purification components, preventing the core components from being blocked and damaged, providing a clean air intake environment for the middle adsorption components, and ensuring the stability of the overall purification effect.

[0028] Two sets of inclined guide plates 10 are connected to the flow diversion side plate 9. The inclined guide plates 10 are used to further optimize the airflow path, enhance the buffering and diversion effect of the airflow, and enable the high-speed oil fume airflow to be evenly distributed, avoiding the problem of insufficient filtration caused by excessive local airflow velocity. At the same time, they assist the flow diversion side plate in intercepting large particulate impurities, improving the interception efficiency of the pre-filter, and reducing impurity residue.

[0029] The middle layer adsorption component includes an arched filter frame 11, which is detachably mounted between the tops of two sets of flow-diverting side plates 9. This frame supports and fixes the core adsorption components. Its arched structure increases the airflow contact area and extends the airflow residence time, providing sufficient conditions for the adsorption reaction. A honeycomb activated carbon filter element 6 is detachably mounted inside the arched filter frame 11. The honeycomb activated carbon filter element 6 is 20mm thick and made of porous activated carbon material. Utilizing the large specific surface area and abundant microporous structure of the porous material, it efficiently captures and adsorbs volatile organic gases, various odor molecules, and a small amount of fine oil mist in the oil fume airflow through both physical and chemical adsorption, removing the pungent odor during the exhaust process and solving the problem of oil fume odor pollution. The 20mm filter element thickness ensures sufficient adsorption capacity, preventing a decrease in purification effect due to adsorption saturation. The detachable design facilitates regular replacement of the filter element, ensuring continuous and stable adsorption performance.

[0030] The bottom of the square box 1 is fixed with a lower cover plate 2 by screws, and the top of the box is fixed with an upper cover plate 3 by screws. The lower cover plate 2 is used to seal the bottom of the box and fix the air inlet structure, while the upper cover plate 3 is used to seal the top of the box and support the rear fine filter assembly. Both are fixed with screws, balancing sealing performance and ease of disassembly and assembly, facilitating future maintenance of the internal structure of the box. The bottom of the lower cover plate 2 is connected to a multi-diameter adapter 4, which allows for flexible adaptation of the device to the air outlets of different specifications and models of range hoods, without requiring additional modifications to the range hood or the device itself, reducing installation difficulty, improving the versatility of the device, and meeting the installation needs of different users.

[0031] The post-filter assembly is a HEPA medium-efficiency filter element 5. As the final stage of the three-stage purification process, it performs deep filtration on the airflow after the pre-filter and middle layer adsorption, removing residual tiny oil mist particles and fine impurities from the airflow, further improving purification accuracy and avoiding secondary pollution caused by the emission of tiny particles. The HEPA medium-efficiency filter element 5 has a bag-type or plate-type structure, which can be flexibly selected according to the housing space and purification needs. The HEPA medium-efficiency filter element 5 is detachably installed in the upper cover plate 3 for easy cleaning and replacement. The filter material is made of dense fiber material with weak static electricity, which has both physical interception and electrostatic adsorption functions. It can "capture" tiny particles through the interception effect of dense fibers and capture even finer impurities through electrostatic adsorption. At the same time, it can effectively prevent odors and impurities in the public flue from flowing back into the room, solving the problem of odor backflow and ensuring the indoor living environment.

[0032] The square box 1 is equipped with sealing rings at both the air inlet and outlet to enhance the sealing performance between the device and the range hood outlet, public flue, or exhaust pipe, and to prevent oil fume from leaking at the connection.

[0033] This multi-functional activated carbon purification device, installed at the exhaust vent of a range hood, initiates the first stage of purification when the range hood discharges fumes. The high-speed airflow first enters the square housing 1 through the bottom air inlet (sealed to the range hood exhaust vent, with a sealing ring to prevent gas leakage), initiating the first-stage purification process. Two sets of diverting side plates 9 are detachably installed on the inner walls of both sides of the square housing 1. Two sets of inclined guide plates 10 are connected to the side plates, forming a tortuous airflow channel. The physical blocking effect of the diverting side plates 9 and the inclined guide plates 10 buffers and diverts the high-speed flowing fumes, while directly intercepting large particles of oil mist, water droplets, and solid waste oil carried in the airflow. This separates these impurities from the airflow, preventing them from entering subsequent purification components. The diverting side plates 9 perform preliminary screening of the fumes, providing a clean airflow environment for subsequent middle-layer adsorption, reducing the damage to the core purification components from the source.

[0034] The airflow, after passing through the pre-filter (mainly composed of volatile organic compounds (VOCs), various odor molecules, and a small amount of fine oil mist), continues to enter the middle adsorption module along the airflow direction to complete the second stage of deep purification. The middle adsorption module consists of an arched filter frame 11 and a honeycomb activated carbon filter element 6. The arched filter frame 11 is detachably installed between the tops of the two sets of guide and diversion side plates 9, and the honeycomb activated carbon filter element 6 is detachably placed inside the arched filter frame 11. The honeycomb activated carbon filter element 6 is 20 mm thick and uses porous activated carbon material. Made from the core principle of porous activated carbon, it utilizes the huge specific surface area and rich microporous structure of porous activated carbon to powerfully capture and adsorb organic odor molecules and harmful gases such as benzene series, aldehydes, ketones and alkanes in the airflow through van der Waals forces (physical adsorption) and chemical adsorption of surface functional groups. The arched structure design combined with the 20MM filter thickness effectively prolongs the residence time of the airflow in the activated carbon layer, ensuring that the adsorption reaction is fully carried out, thoroughly removing the pungent odor at the end of the exhaust and solving the problem of oil fume odor pollution.

[0035] Even after the airflow has been adsorbed by the middle layer of activated carbon, it may still contain a small amount of tiny oil mist particles. If these particles are discharged directly, they will cause secondary pollution to the environment and easily lead to the backflow of odors from the public flue. Therefore, the airflow continues to enter the post-filter assembly to complete the third stage of terminal purification. The post-filter assembly is a HEPA medium-efficiency filter element 5, which adopts a bag or plate structure and can be detachably installed in the top cover plate 3 of the square box 1. The filter material is made of dense fiber material with weak static electricity. Through the physical interception of the dense fiber, tiny oil mist particles are "blocked and stuck". At the same time, the weak static electricity of the filter material is used to capture even smaller particulate impurities in the airflow, achieving uniform flow purification. After purification, the airflow is discharged through the air outlet at the top of the square box 1. The air outlet can be set open directly or sealed with a sealing ring to the public flue or exhaust pipe to adapt to different smoke exhaust needs. At the same time, the HEPA medium-efficiency filter element 5 can effectively prevent odors and impurities in the public flue from flowing back into the room, solving the problem of odor backflow.

[0036] The bottom of the square box 1 is fixed with a lower cover plate 2 by screws. The bottom of the lower cover plate 2 is connected to a multi-diameter adapter 4, which can be adapted to the air outlet of different specifications of range hoods, improving the versatility of the device. The front of the square box 1 is detachably equipped with a front cover plate 7, which is fixed to the box body by hand-tightening bolts 8. With the detachable design of each component, it is convenient to disassemble, clean and replace the filter, baffle plate 10 and other components in the future, ensuring the long-term stable operation of the device.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multifunctional activated carbon purification device installed at the air outlet of a range hood, characterized in that, include: A square box (1) is provided with an air inlet at one bottom end that is sealed to the air outlet of the range hood, and an air outlet at one top end that can be directly opened or sealed to the public flue. The square box (1) is provided with a pre-coarse filter assembly, a middle adsorption assembly and a post-fine filter assembly arranged in sequence along the airflow direction. The pre-coarse filter assembly, the middle adsorption assembly and the post-fine filter assembly are all detachably connected to the square purification shell (1). The front end of the square box (1) is detachably provided with a front cover plate (7), which is fixed to the square box (1) by a hand-tightening bolt (8).

2. The multifunctional activated carbon purification device installed at the air outlet of a range hood according to claim 1, characterized in that: The pre-filter assembly includes two sets of flow diversion side plates (9), which are detachably mounted on the inner walls of both sides of the square box (1) to form a tortuous airflow channel.

3. The multifunctional activated carbon purification device installed at the air outlet of a range hood according to claim 2, characterized in that: Two sets of inclined guide plates (10) are connected to the flow diversion side plate (9).

4. A multifunctional activated carbon purification device installed at the air outlet of a range hood according to claim 2, characterized in that: The middle layer adsorption component includes an arched filter frame (11), which is detachably disposed between the tops of two sets of flow diversion side plates (9), and a honeycomb activated carbon filter element (6) is detachably disposed inside the arched filter frame (11).

5. A multifunctional activated carbon purification device installed at the air outlet of a range hood according to claim 1, characterized in that: The bottom end of the square box (1) is fixed with a lower cover plate (2) by screws, and the top end is fixed with an upper cover plate (3) by screws. The bottom of the lower cover plate (2) is connected to a multi-diameter adapter (4).

6. A multifunctional activated carbon purification device installed at the air outlet of a range hood according to claim 5, characterized in that: The post-filter assembly is a HEPA medium-efficiency filter element (5), which is a bag or plate structure and is detachably installed inside the upper cover plate (3).

7. A multifunctional activated carbon purification device installed at the air outlet of a range hood according to claim 1, characterized in that: The square box (1) is equipped with sealing rings at both the air inlet and the air outlet.

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