A large flow air purification device

Abstract

The application discloses a large-flow air purification equipment, which comprises a box body with a collecting cavity inside, an air inlet at the front end of the box body, an air outlet at the rear end of the box body, a filter rack arranged in the collecting cavity, and a purification cavity in the filter rack. The front end surface of the filter rack is arranged in the downstream of the air inlet in a position opposite to the air inlet, so as to divide the gas flowing into the air inlet into two parts and flow to the two sides of the filter rack. The cavity opening of the purification cavity is adapted to the upstream of the air outlet in a position opposite to the air outlet, and the cavity opening edge of the purification cavity is tightly combined with and fixed to the inner wall of the rear end of the box body. The outer wall of the front end and the two sides of the filter rack is gap-fitted with the inner wall of the front end and the two sides of the collecting cavity, so as to form a diffusion channel for the gas to pass through. A plurality of filter channels are respectively penetrated through the two side walls of the filter rack and are communicated between the diffusion channel and the purification cavity, and a filter purification unit is arranged in each filter channel in a one-to-one correspondence. The large-flow air purification equipment has a compact structure, so that the transportation and installation of the large-flow air purification equipment are more convenient and easy.

Description

Technical Field

[0001] This invention relates to the technical field of high-flow ventilation and purification and radioactive waste gas treatment equipment, and particularly to a high-flow air purification device. Background Technology

[0002] At present, the industry usually uses large-sized air filtration and purification equipment or multiple sets of filtration and purification equipment connected in parallel for the filtration and purification treatment of high-flow ventilation systems.

[0003] Correspondingly, whether using large-sized individual purification equipment or multiple sets of conventional purification equipment arranged in parallel for coordinated operation, the assembly space requirements of related buildings and factory buildings are relatively large. In addition, the transportation and installation of large purification equipment are difficult, and the coordinated transportation and parallel installation of multiple purification equipment are also difficult. This has many adverse effects on the overall installation and layout of the corresponding high-flow ventilation system.

[0004] In view of this, how to optimize the structure and performance of air purification equipment to make its structure more compact, so as to make its transportation and installation easier, is an important technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a high-flow-rate air purification device with a relatively compact structure, which makes its transportation and installation easier.

[0006] To solve the above-mentioned technical problems, the present invention provides a high-flow-rate air purification device, including a box with an internal collection cavity, an air inlet for gas to enter the collection cavity at the front end of the box, an air outlet for gas to exit the collection cavity at the rear end of the box, and a filter rack arranged inside the collection cavity, with the front end face of the filter rack aligned downstream of the air inlet along the airflow direction to divert the gas entering the collection cavity from the air inlet to both sides of the filter rack;

[0007] The filter rack has a purification chamber inside. The opening of the purification chamber is located at the rear end of the filter rack and is aligned and adapted to the upstream of the air outlet along the airflow direction. The edge of the opening of the purification chamber is tightly attached to and fixed to the inner wall of the rear end of the housing.

[0008] The outer walls of the front end and both sides of the filter rack are fitted with the inner walls of the front end and both sides of the collecting cavity to form a diffusion channel for gas to pass through. Several filter channels connecting the diffusion channel and the purification cavity are respectively penetrated on the two side walls of the filter rack. Filter purification units are arranged in the filter channels one by one.

[0009] Preferably, the filter rack includes a flow-expanding section at the front end and support sections symmetrically arranged on both sides of the flow-expanding section and extending rearward respectively. The flow-expanding section is a closed structure, and the front end face of the flow-expanding section is the front end face of the filter rack. The filter channels are respectively arranged on the two support sections.

[0010] The rear end face of the flow expansion section and the inner sidewalls of the two support sections enclose each other to form the purification chamber.

[0011] Preferably, the front end face of the diffuser is a plane perpendicular to the axis of the air inlet.

[0012] Preferably, the cross-sections of the collecting cavity and the filter rack are both rectangular, the front end face of the flow amplification part is parallel to the front inner wall of the collecting cavity, and the side outer wall of the support part is parallel to the side inner wall of the collecting cavity.

[0013] Preferably, an exhaust guide hood protrudes from the rear outer wall of the housing, the inner diameter of the exhaust guide hood increases from front to back, and the front end of the exhaust guide hood is coaxially aligned and connected to the downstream of the air outlet along the airflow direction.

[0014] Preferably, the exhaust shroud is equipped with a check valve that allows gas to pass through only from front to back.

[0015] Preferably, the check valve includes a valve body embedded in the rear end of the exhaust guide shroud and a plurality of blades arranged on the valve body, wherein the blades are gravity-type self-closing blades.

[0016] Preferably, the front end face of the housing is provided with an air intake shroud, the inner diameter of the air intake shroud increases from front to back, and the rear end of the air intake shroud is coaxially aligned and connected to the upstream of the air intake along the airflow direction.

[0017] Preferably, the side wall of the housing has a plurality of maintenance holes, which are arranged in a one-to-one correspondence with the filter channels.

[0018] Preferably, maintenance doors are provided on each maintenance hole, one end of which is hinged to the housing, and the other end of which is detachably adapted to the housing.

[0019] Compared to the aforementioned background technology, the high-flow-rate air purification device provided by this invention, during operation, sees the airflow entering the collecting chamber through the air inlet impacting the front end of the filter rack and being moderately blocked, thus diverting the gas to the diffusion channels located on both sides of the filter rack. This achieves efficient diversion of the unfiltered gas entering the collecting chamber. The gas diverted to both sides of the filter rack is filtered by each filtration and purification unit before entering the purification chamber and being discharged through the air outlet. Therefore, the high-flow-rate air purification device provided by this solution optimizes the airflow path inside the housing through the coordinated adaptation of the diffusion channels and the purification chamber, significantly increasing the total gas filtration area within a single device. This results in better gas diffusion within the collecting chamber and more uniform gas flow at each filtration and purification unit. Consequently, while meeting the high-flow-rate air purification requirements, the overall volume of the purification device is effectively reduced, making the structure of the high-flow-rate air purification device more compact, simplifying overall transportation and installation, and correspondingly reducing the assembly space required for overall installation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a top view of a high-flow-rate air purification device provided in a specific embodiment of the present invention;

[0022] Figure 2 for Figure 1 Perspective view;

[0023] Figure 3 for Figure 1 The front view;

[0024] Figure 4 for Figure 3 Perspective view;

[0025] Figure 5 for Figure 3 The left view;

[0026] Figure 6 for Figure 3 The right view.

[0027] in:

[0028] 11-Box body; 111-Collection chamber; 112-Air inlet; 113-Air outlet; 114-Maintenance hole;

[0029] 12-Filter rack; 121-Purification chamber; 122-Filter channel; 123-Flow diffuser; 124-Support section;

[0030] 13-Diffusion channel;

[0031] 14 - Filtration and purification unit;

[0032] 15 - Exhaust shield;

[0033] 16-Check valve; 161-Valve body; 162-Blade;

[0034] 17-Intake fairing;

[0035] 18-Maintenance door. Detailed Implementation

[0036] The core of this invention is to provide a high-flow-rate air purification device with a relatively compact structure, which makes its transportation and installation easier.

[0037] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] It should be noted in advance that, in this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, in this invention, unless otherwise expressly specified and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or contact between the first and second features not being in direct contact but through another feature between them.

[0040] In addition, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" for the first feature and the second feature include the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature. The terms "above," "below," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0041] In a specific embodiment, the high-flow-rate air purification device provided by the present invention, in conjunction with reference to [reference needed], Figures 1 to 6 As shown, the device includes a housing 11 with an internal collecting chamber 111. The front end of the housing 11 has an air inlet 112 for gas to enter the collecting chamber 111, and the rear end has an air outlet 113 for gas to exit the collecting chamber 111. A filter rack 12 is installed inside the collecting chamber 111. The front end face of the filter rack 12 is aligned downstream of the air inlet 112 along the airflow direction to divert the gas entering the collecting chamber 111 from the air inlet 112 to both sides of the filter rack 12. Generally, the housing 11 can be constructed from sheet metal such as stainless steel or galvanized steel through welding, riveting, or molding. The air inlet 112 and air outlet 113 can be circular, square, or rectangular openings, and their size and shape can be designed according to the expected airflow and pipe connection method. The front end face of the filter rack 12 can be a solid or sandwich plate structure, such as a flat baffle, an arc surface, or a conical surface. The front end is positioned behind the air inlet 112, and its size and position are such that the airflow entering through the air inlet 112 is blocked by it and guided to the left and right sides of the filter rack 12.

[0042] The filter rack 12 has a purification chamber 121 inside. The opening of the purification chamber 121 is located at the rear end of the filter rack 12 and is aligned and adapted to the upstream of the air outlet 113 along the airflow direction. The edge of the opening of the purification chamber 121 is tightly fitted and fixed to the inner wall of the rear end of the housing 11. As shown in the figure, the opening of the purification chamber 121 can be directly welded and fixed to the inner wall of the housing 11 to ensure the assembly strength of the filter rack 12 and the housing 11 and the structural stability of the purification chamber 121. It should also be ensured that the opening of the purification chamber 121 is tightly fitted and connected to the inner wall of the housing 11 to avoid gas leakage between the purification chamber 121 and the diffusion channel 13.

[0043] The outer walls of the front end and both sides of the filter rack 12 are fitted with the inner walls of the front end and both sides of the collecting cavity 111 to form a diffusion channel 13 for gas passage. Several filter channels 122 are respectively passed through the two side walls of the filter rack 12, connecting the diffusion channel 13 and the purification cavity 121. Filter purification units 14 are correspondingly arranged in each filter channel 122. As shown in the figure, from a top view, the diffusion channel 13 can be a roughly "U" shaped gas channel to guide the diverted gas to be effectively diffused and pressure equalized before entering the filter purification unit 14, thereby ensuring the overall filtration efficiency and purification effect of the high-flow-rate air purification device.

[0044] It is easy to understand that in practical applications, the filtration and purification unit 14 can flexibly select various types of filter materials, such as high-efficiency particulate air (HEPA) filters, activated carbon filters, electrostatic dust removal modules, or filter screen assemblies, according to actual operating conditions, to meet the filtration and purification requirements of gases under different operating conditions. Different types of filtration and purification units 14 can be reliably installed in the filter channel 122 by means of snap-fit, thread, or compression, and can be flexibly disassembled when necessary for equipment inspection, maintenance, and parts replacement.

[0045] During actual operation, the airflow entering the collecting chamber 111 through the air inlet 112 impacts the front end of the filter rack 12 and is moderately blocked, so that the gas is diverted to the diffusion channels 13 located on both sides of the filter rack 12, thereby forming an efficient diversion of the unfiltered gas entering the collecting chamber 111; the gas diverted to both sides of the filter rack 12 is filtered by each filter purification unit 14 and then enters the purification chamber 121, and is discharged through the air outlet 113.

[0046] Therefore, the high-flow-rate air purification equipment provided by this solution optimizes the airflow path inside the housing 11 through the coordinated adaptation of the diffusion channel 13 and the purification chamber 121, which significantly increases the total gas filtration area in a single device. This results in better gas flow diffusion in the collecting chamber 111, and more uniform gas flow at each filtration and purification unit 14. As a result, while meeting the high-flow-rate air purification requirements, the overall volume of the purification equipment is effectively reduced, making the structure of the high-flow-rate air purification equipment more compact, and the overall transportation and installation of the equipment simpler and easier. The assembly space required for the overall installation of the equipment is also reduced accordingly.

[0047] It is easy to understand that in practical assembly applications, the internal component structure layout of the high-flow-rate air purifier can be flexibly adjusted according to the actual installation environment. For example, if the length of the high-flow-rate air purifier is limited under actual operating conditions, multiple rows of filter purification units 14 can be arranged in the height direction of the housing 11; similarly, if the height of the high-flow-rate air purifier is limited under actual operating conditions, multiple rows of filter purification units 14 can be arranged in the length direction of the housing 11. In short, the specific number and arrangement of the filter purification units 14 can be adapted to the extended structure of the diffusion channel 13 inside the housing 11 to ensure that the high-flow-rate air purifier achieves optimal working performance, efficiently utilizes limited assembly space, and optimizes the adaptability of the high-flow-rate air purifier to different operating conditions.

[0048] Specifically, the filter rack 12 includes a flow-expanding section 123 at the front end and support sections 124 symmetrically arranged on both sides of the flow-expanding section 123 and extending rearward respectively. The flow-expanding section 123 is a closed structure, and its front end face is the front end face of the filter rack 12. Filter channels 122 are respectively arranged on the two support sections 124. The rear end face of the flow-expanding section 123 and the inner sidewalls of the two support sections 124 enclose each other to form a purification chamber 121. Generally, the rear end face of the flow-expanding section 123 can be straight and perpendicularly connected to the inner sidewall of the support section 124; or it can have a certain inclination angle to optimize the uniformity of airflow distribution in the purification chamber 121 and improve purification efficiency. The inner sidewall of the support section 124 can be smooth or designed with a flow-guiding structure to further optimize the airflow organization in the purification chamber 121.

[0049] The diffuser 123 can be designed as a plate-like structure with a certain thickness, such as a flat baffle, or as a guide surface with a certain curvature to optimize the diffusion effect of the airflow. Its shape and size should match the air inlet 112 to achieve effective blocking and initial diversion of large flow rates of gas. The diffuser 123 is designed as a closed structure, meaning it has no through holes or gaps, completely blocking direct airflow. For example, the diffuser 123 can be integrally formed from a solid metal plate, high-strength plastic plate, or composite material plate, or it can be made by tightly welding, bonding, or riveting multiple layers of materials to ensure its airtightness, thereby ensuring that all gas entering the collecting chamber 111 must bypass the diffuser 123 and enter the diffusion channels 13 on both sides. Correspondingly, the front end face of the diffuser 123 directly faces the air inlet 112, serving as the frontmost air-receiving surface of the filter rack 12. This design simplifies the structure and avoids the need for an additional front baffle. For example, the front end face of the diffuser 123 can be a flat surface perpendicular to the axis of the air inlet 112 to maximize the blocking area; or it can be a slightly curved surface to guide the airflow to be split more smoothly.

[0050] The support portion 124 is symmetrically arranged on both sides of the flow-expanding portion 123 and extends rearward. Its main function is to install the filter purification unit 14. The support portion 124 can be a plate structure with a rectangular cross-section or a box-shaped structure with reinforcing ribs to improve its structural strength and stability. Its length and width should be sufficient to accommodate the filter channel 122 and the filter purification unit 14. Accordingly, the filter channel 122 can be rectangular and evenly distributed on the side wall of the support portion 124 to ensure the uniformity of airflow through the filter purification unit 14; alternatively, depending on the airflow distribution characteristics, non-uniformly distributed or different sized filter channels 122 can be used.

[0051] Therefore, by utilizing the coordinated operation of all components of the filter rack 12, the gas entering from the air inlet 112 is effectively blocked by the diffuser 123 and reliably diverted to the diffusion channels 13 formed on both sides of the filter rack 12. This prevents untreated gas from directly entering the purification chamber 121, thus ensuring that all gas can be treated by the filtration and purification unit 14. Simultaneously, the filter channels 122 are neatly arranged on the support 124, allowing the diverted airflow to pass smoothly and directly through the filtration and purification unit 14. This optimizes the airflow path, reduces flow resistance, and better meets the needs of high-flow-rate air purification. Furthermore, the purification chamber 121 is formed by the mutual enclosure of the rear end face of the flow expansion section 123 and the inner sidewalls of the two support sections 124, realizing the structural integration and regularization of the purification chamber 121. No additional parts are required, which not only simplifies the overall structure of the filter rack 12, making it more compact, and thus making the overall structure of the equipment more compact and the installation layout more flexible; but also ensures the structural stability of the purification chamber 121, which is conducive to the smooth collection and discharge of filtered gas, and further improves the operational stability and reliability of the equipment under high flow conditions.

[0052] Based on this, the front end face of the diffuser 123 is a plane perpendicular to the axis of the air inlet 112. The airflow entering through the air inlet 112 generally flows along the axis of the air inlet 112. Setting the front end face of the diffuser 123 to a plane perpendicular to the axis of the air inlet 112 ensures that the obstruction force on the airflow is uniform at all points, preventing the airflow from being biased to one side due to tilting or unevenness of the front end face. This ensures that the airflow is evenly distributed to the diffusion channels 13 on both sides of the filter rack 12. This balances the resistance pressure drop of each filter purification unit 14 on the two side walls, preventing premature failure of some filter purification units 14, and also ensures that the overall equipment can stably withstand large airflow demands, improving the overall stability of the filtration operation. This structure is simple and clear, achieving uniform airflow without the need for additional flow guiding structures, and does not increase the structural complexity of the equipment. This further simplifies the internal component structure of the housing 11, making the overall structure of the high-flow air purification equipment more compact.

[0053] Furthermore, as shown in the figure, both the collecting cavity 111 and the filter rack 12 have rectangular cross-sections. The front end face of the flow-expanding part 123 is parallel to the inner front wall of the collecting cavity 111, and the outer side wall of the support part 124 is parallel to the inner side wall of the collecting cavity 111. As a regular geometric shape, the manufacturing and processing of components with rectangular cross-sections is relatively simple. For example, the main structure of the collecting cavity 111 and the filter rack 12 inside the housing 11 can be manufactured into a rectangular cross-section shape through sheet metal bending, welding, or integral molding processes; or, a modular design can be adopted, assembling the collecting cavity 111 and the filter rack 12 from multiple rectangular profiles or plates. This regular shape helps simplify the production process, reduce manufacturing costs, and lay the foundation for subsequent precise assembly.

[0054] Furthermore, the front end face of the diffuser 123 is parallel to the front inner wall of the collecting cavity 111. This parallel relationship further optimizes the uniformity and diffusion effect of the airflow when entering the diffusion channel 13. In addition, the outer side wall of the support 124 is also parallel to the inner side wall of the collecting cavity 111. This structural design aims to ensure that the width of the diffusion channel 13 remains consistent along the airflow direction, so that the airflow state at each filtration and purification unit 14 is roughly similar. This allows the airflow to flow smoothly and evenly to each filtration channel 122, making the load on each filtration and purification unit 14 more uniform. This not only helps to improve the stability of the overall filtration operation but also extends the overall service life of the equipment.

[0055] On the other hand, an exhaust shroud 15 protrudes from the rear outer wall of the housing 11. This exhaust shroud 15 can be integrally molded and connected to the rear outer wall of the housing 11, for example, through welding, casting, or injection molding, ensuring the sealing and structural strength of the connection. Alternatively, the exhaust shroud 15 can be a separately manufactured component, detachably installed on the rear outer wall of the housing 11 via flange or bolt connections, facilitating maintenance or replacement. The inner diameter of the exhaust shroud 15 increases from front to back. It can be designed as a smooth conical structure, where the inner diameter increases continuously and uniformly from the front to the rear to achieve smooth airflow expansion. Alternatively, it can be designed as a stepped structure, consisting of several sections of cylindrical or square tubes with different inner diameters connected sequentially, each section having a larger inner diameter than the previous one, creating a graded expansion effect. The front end of the exhaust shroud 15 is coaxially aligned with the downstream end of the exhaust outlet 113 along the airflow direction. The front end of the exhaust shroud 15 can be designed as an interface that matches the shape of the air outlet 113. It can be connected by a sealing gasket and fasteners to ensure airtightness and make the center lines of the two coincide. Alternatively, a sleeve or insertion connection can be used, in which the front end of the exhaust shroud 15 is directly sleeved or inserted into the air outlet 113 and fixed by welding, bonding or mechanical snap-fitting, while ensuring the axis alignment.

[0056] Thus, by using the exhaust guide hood 15 to centrally guide the purified gas flowing out of the outlet 113, it not only avoids the dispersion of the outflowing gas but also facilitates connection with downstream ventilation ducts, improving the overall ease of installation and adaptation of the equipment. Simultaneously, designing the exhaust guide hood 15 with an inner diameter increasing from front to back allows it to gradually expand the flow area as the large flow of gas exits the outlet 113, reducing the outlet velocity and optimizing the diffusion effect during gas discharge. This prevents blockage or obstruction during gas discharge, effectively reducing airflow resistance and meeting the requirement for smooth discharge of large flow of gas. Furthermore, coaxially aligning the front end of the exhaust guide hood 15 downstream of the outlet 113 along the airflow direction ensures that all gas flowing out of the outlet 113 can smoothly and completely enter the exhaust guide hood 15, preventing additional disturbances caused by misalignment, further reducing airflow resistance, and ensuring the stability of large flow of gas discharge. Overall, this application improves the discharge conditions of high-flow-rate purified gas by optimizing the structure of the air outlet of the purification equipment, significantly reduces airflow discharge resistance, thereby ensuring the stability and efficiency of the equipment's high-flow-rate purification operation, effectively solving the problem of poor discharge of high-flow-rate gas, and improving the overall operating performance of the air purification equipment.

[0057] Correspondingly, a check valve 16 is installed inside the exhaust hood 15, allowing only gas to pass through from front to back. When the equipment is operating normally, the purified gas can be smoothly discharged through the check valve 16; however, when the equipment stops operating or when there is a pressure reversal inside and outside the equipment, the check valve 16 can close, effectively preventing external gas from flowing back along the exhaust hood 15 into the purification chamber 121 and the filter structure inside the equipment. This design not only ensures the smooth discharge of large volumes of gas but also avoids many adverse effects caused by backflow. For example, it prevents unpurified gas containing impurities from contaminating the filter purification unit 14, helping to extend the service life of the filter purification unit 14; it also prevents rain or humid air from affecting the service life of the purification unit when the equipment is placed outdoors, making it more environmentally adaptable. Furthermore, by placing the check valve 16 inside the exhaust guide shroud 15, the check valve 16 can be installed and fixed using the shroud 15's own pipe structure, without requiring additional modifications to the original structure of the housing 11. This avoids compromising the sealing of the housing 11's collection chamber 111 and avoids occupying additional installation space within the collection chamber 111, maintaining the overall compactness of the equipment structure and meeting the design requirements of high-flow purification equipment in small spaces. By blocking reverse airflow, this solution also ensures that the initial gas introduced during the next startup will not be interfered with by reverse-flowing impurities, thus guaranteeing the stability and reliability of the equipment's purification operation.

[0058] More specifically, the check valve 16 includes a valve body 161 embedded in the rear end of the exhaust guide shroud 15 and several blades 162 arranged on the valve body 161. The blades 162 are gravity-type self-closing blades 162. The valve body 161 is embedded in the rear end of the exhaust guide shroud 15, and its fixation is achieved by the structure of the exhaust guide shroud 15 itself. No additional complex fixing structure is required, which is compatible with the overall structural design of existing equipment, making disassembly and maintenance more convenient. Of course, flange connections, press-fitting, or welding can also be used to achieve reliable installation of the valve body 161 and the exhaust guide shroud 15. Correspondingly, the valve body 161 is located at the rear end of the exhaust guide shroud 15 and will not cause additional obstruction to the gas flow in the front section, ensuring the smooth passage of large flow rates of gas.

[0059] A number of blades 162 are arranged on the valve body 161. By dividing the flow passage cross section by multiple blades 162, it can not only adapt to the size requirements of large flow, but also reduce the airflow impact force on a single blade 162, thereby enhancing the stability of the overall structure. In addition, the design of multiple blades 162 will not excessively obstruct the airflow, ensuring sufficient flow efficiency.

[0060] By configuring blade 162 as a gravity-driven self-closing blade, the rotation axis of blade 162 can be positioned above or off-center from the center of gravity, allowing blade 162 to close naturally when stationary. This design eliminates the need for additional drive mechanisms or control systems to open and close blade 162, significantly simplifying the structure of check valve 16 and reducing manufacturing costs and maintenance complexity. During normal operation and exhaust, the outward airflow easily pushes blade 162 open, maintaining unobstructed flow and meeting the demands of high-flow exhaust. When the equipment stops operating and gas backflow occurs, blade 162 automatically closes under its own weight, blocking the backflow and achieving reliable backflow prevention. This eliminates the need for additional drive or control structures, resulting in a simple and reliable overall structure, reduced overall equipment costs, and easier subsequent maintenance.

[0061] In addition, an air intake shroud 17 protrudes from the front end of the housing 11. The inner diameter of the air intake shroud 17 increases from front to rear, and the rear end of the air intake shroud 17 is coaxially aligned and connected to the upstream of the air intake 112 along the airflow direction. The rear end of the shroud can be directly and tightly joined to the edge of the air intake 112 to form a continuous flow channel; or, the rear end of the shroud can be inserted into the air intake 112 for a certain distance, or the air intake 112 can partially cover the rear end of the shroud to ensure coaxial alignment and smooth airflow transition. The air intake shroud 17 can be an integrally formed structure, connected to the front end of the housing 11 by welding, casting, or other methods; or, it can be a separately manufactured tubular or disc-shaped component, installed on the front end of the housing 11 by detachable or fixed connections such as bolts, clips, and flanges, so that it protrudes partially or entirely outward.

[0062] Similar to the design principle of the exhaust shroud 15 mentioned above, the intake shroud 17 can be designed as a conical structure with its inner diameter gradually increasing linearly or non-linearly; alternatively, it can be a stepped structure, composed of several sections of cylinders with different diameters connected sequentially, with the diameter of each subsequent section being larger than that of the previous one. This design of gradually increasing inner diameter, along with the direction of gas flow into the equipment, can gently diffuse and streamline the large flow of air flowing into the intake shroud 17, reduce the cross-sectional wind speed, enhance airflow diffusion, reduce airflow vortices, and prevent the sudden expansion of the diameter of the airflow when it enters the intake port 112, thus avoiding a large amount of turbulence.

[0063] In addition, several maintenance holes 114 are provided on the side wall of the housing 11, and the maintenance holes 114 are arranged in a one-to-one correspondence with the filter channels 122. The maintenance holes 114 can be designed in various shapes according to actual needs, such as circular, square or elliptical, and their size should be sufficient to accommodate maintenance tools or the arm of the operator. During the manufacturing process, these maintenance holes 114 can be formed on the side wall of the housing 11 by pre-drilling holes or machining (such as drilling, cutting). Each maintenance hole 114 provides an independent and direct external operating channel for each filtration and purification unit 14. When the filtration and purification unit 14 needs maintenance or replacement due to aging, damage or contamination caused by long-term use, the operator does not need to disassemble the entire equipment or move the filter rack 12, but only needs to open the corresponding maintenance hole 114 to operate. This design avoids damage to the overall structure of the equipment and the internal airflow path, thereby ensuring that the original filtration and purification performance of the equipment is not affected. At the same time, this convenient maintenance method greatly reduces the difficulty of maintenance operations, shortens the time required for maintenance operations, significantly improves the efficiency and convenience of equipment maintenance, and ensures that the equipment can be quickly restored to operation.

[0064] Based on this, maintenance doors 18 are correspondingly installed on the maintenance holes 114, opening and closing respectively. One end of the maintenance door 18 is hinged to the housing 11, and the other end of the maintenance door 18 is detachably fitted to the housing 11. Of course, the maintenance door 18 can adopt a flip-top structure connected to the housing 11 via a pivot or rotating shaft as mentioned in this solution, or it can adopt a cover-type structure that is fixed by magnetic attraction and can be removed as a whole. In practical applications, operators can flexibly select and adjust according to specific working conditions and component adaptation requirements. In principle, any method that can meet the actual application needs of the high-flow air purification equipment is acceptable.

[0065] Thus, by individually matching and setting an openable and closable maintenance door 18 for each maintenance hole 114, it can be ensured that each maintenance hole 114 can achieve independent sealing and opening operations without interfering with the sealing status of other locations. The openable and closable structure of the maintenance door 18 can switch between open and closed states according to whether the equipment is currently in working or maintenance state, adapting to the usage needs of different scenarios. One end of the maintenance door 18 is hinged to the housing 11. The hinge structure allows the maintenance door 18 to rotate around the hinge end to open and close. During maintenance, it is not necessary to completely remove the maintenance door 18 from the housing 11, which simplifies the operation steps of opening the maintenance hole 114 and avoids the problems of inconvenient storage and easy loss or damage of the maintenance door 18 after complete disassembly. The other end of the maintenance door 18 is designed to be detachably adapted to the housing 11. When the maintenance door 18 is closed during normal operation of the equipment, it can be reliably fixed to the housing 11, ensuring the airtightness of the maintenance hole 114. This prevents unpurified air from entering the equipment and affecting the airflow and purification effect, as well as preventing unfiltered or unpurified air from escaping the equipment, thereby reducing pollution to the outdoor environment. When maintenance is required, the other end of the maintenance door 18 can be quickly released to open the maintenance hole 114 and carry out the work, balancing airtightness and ease of operation.

[0066] In summary, the high-flow-rate air purification device provided in this invention, during operation, sees the airflow entering the collecting chamber through the inlet impacting the front face of the filter rack and being moderately blocked, thus diverting the gas to the diffusion channels located on both sides of the filter rack. This achieves efficient diversion of the unfiltered gas entering the collecting chamber. The gas diverted to both sides of the filter rack is filtered by each filtration and purification unit before entering the purification chamber and being discharged through the outlet. Therefore, the high-flow-rate air purification device provided by this solution optimizes the airflow path inside the housing through the coordinated adaptation of the diffusion channels and the purification chamber, significantly increasing the total gas filtration area within a single device. This results in better gas diffusion within the collecting chamber and more uniform gas flow at each filtration and purification unit. Consequently, while meeting the high-flow-rate air purification requirements, the overall volume of the purification device is effectively reduced, making the structure of the high-flow-rate air purification device more compact, simplifying overall transportation and installation, and correspondingly reducing the assembly space required for overall installation.

[0067] The high-flow-rate air purification device provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A high-flow-rate air purification device, characterized in that, The device includes a housing with an internal collection chamber. The front end of the housing has an air inlet for gas to enter the collection chamber, and the rear end of the housing has an air outlet for gas to exit the collection chamber. A filter rack is provided inside the collection chamber. The front end face of the filter rack is aligned downstream of the air inlet along the airflow direction to divert the gas entering the collection chamber from the air inlet to both sides of the filter rack. The filter rack has a purification chamber inside. The opening of the purification chamber is located at the rear end of the filter rack and is aligned and adapted to the upstream of the air outlet along the airflow direction. The edge of the opening of the purification chamber is tightly attached to and fixed to the inner wall of the rear end of the housing. The outer walls of the front end and both sides of the filter rack are fitted with the inner walls of the front end and both sides of the collecting cavity to form a diffusion channel for gas to pass through. Several filter channels connecting the diffusion channel and the purification cavity are respectively penetrated on the two side walls of the filter rack. Filter purification units are arranged in the filter channels one by one.

2. The high-flow-rate air purification device as described in claim 1, characterized in that, The filter rack includes a flow-expanding section at the front end and support sections symmetrically arranged on both sides of the flow-expanding section and extending rearward respectively. The flow-expanding section is a closed structure, and the front end face of the flow-expanding section is the front end face of the filter rack. The filter channels are respectively arranged on the two support sections. The rear end face of the flow expansion section and the inner sidewalls of the two support sections enclose each other to form the purification chamber.

3. The high-flow-rate air purification device as described in claim 2, characterized in that, The front end face of the diffuser is a plane perpendicular to the axis of the air inlet.

4. The high-flow-rate air purification device as described in claim 3, characterized in that, Both the collecting cavity and the filter rack have rectangular cross-sections. The front end face of the flow amplification part is parallel to the front inner wall of the collecting cavity, and the outer side wall of the support part is parallel to the inner side wall of the collecting cavity.

5. The high-flow-rate air purification device as described in claim 1, characterized in that, An exhaust guide hood protrudes from the rear outer wall of the housing. The inner diameter of the exhaust guide hood increases from front to back, and the front end of the exhaust guide hood is coaxially aligned and connected to the downstream of the air outlet along the airflow direction.

6. The high-flow-rate air purification device as described in claim 5, characterized in that, The exhaust shroud is equipped with a check valve that only allows gas to pass through from front to back.

7. The high-flow-rate air purification device as described in claim 6, characterized in that, The check valve includes a valve body embedded in the rear end of the exhaust guide shroud and a plurality of blades arranged on the valve body, wherein the blades are gravity-type self-closing blades.

8. The high-flow-rate air purification device as described in claim 1, characterized in that, The front end face of the housing is provided with an air intake shroud. The inner diameter of the air intake shroud increases from front to back, and the rear end of the air intake shroud is coaxially aligned and connected to the upstream of the air intake along the airflow direction.

9. The high-flow-rate air purification device as described in claim 1, characterized in that, The side wall of the housing has several maintenance holes, which are arranged in a one-to-one correspondence with the filter channels.

10. The high-flow-rate air purification device as described in claim 9, characterized in that, Each maintenance hole is equipped with a corresponding maintenance door that opens and closes. One end of the maintenance door is hinged to the housing, and the other end of the maintenance door is detachably adapted to the housing.

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