A high efficiency particulate air (HEPA) filter air supply outlet

Abstract

The utility model relates to a kind of high-efficiency filter air supply outlet in air purification field, including outer shell, air inlet seat and air outlet seat, outer shell inner chamber is provided with connecting border, filter material is installed in connecting border inner chamber, both sides are equipped with limit plugboard;Outer shell inner wall is slidably connected with positioning side plate, limit slot and limit plugboard are inserted in the inside surface of positioning side plate, the outside surface of the inside surface of positioning side plate is respectively connected with the upper inclined surface guide frame and the lower inclined surface guide frame of connecting border, and gradually changing type flow guide passage is formed;Diffuser plate is set in the lower part of outer shell inner chamber, and concentric circular convex texture and air hole are distributed on its upper surface, air hole is located between adjacent concentric circular convex texture, the utility model is inserted by the insertion structure of limit plugboard and limit slot, realizes quick assembly, and simplifies filter material replacement process;Upper inclined surface guide frame and lower inclined surface guide frame cooperate with positioning side plate to form closed flow guide cavity, eliminate right-angle turning airflow disturbance.

Description

Technical Field

[0001] This utility model relates to the field of air purification, specifically to a high-efficiency filter air outlet. Background Technology

[0002] A filter is a device used to separate, purify, or treat impurities or specific components in a fluid. It is widely used in industrial, environmental protection, medical, and household fields, becoming a key device for ensuring production safety and human health. Its core function is to remove unwanted substances through physical, chemical, or biological methods to ensure that the fluid meets quality or safety standards. In a filter, the air outlet is a key component for airflow delivery, and its performance directly affects indoor air quality and purification efficiency. With the continuous improvement of clean environment requirements in industrial production, medical and health care, and scientific research, the limitations of traditional air outlets in terms of airflow organization, filtration efficiency, and operational stability have gradually become apparent, especially in high-standard cleanrooms and operating rooms.

[0003] Existing filter air outlets generally use welded or bolted frame structures. When replacing the filter media, multiple sets of connecting parts need to be disassembled and the sealing surface recalibrated. The operation relies on professional tools and is time-consuming. Their air guiding components mostly use right-angle turn channel designs. When the airflow passes through, it is easy to form local vortices at the corners, resulting in reduced airflow uniformity and additional energy loss. Traditional sealing structures usually rely on single-layer rubber gaskets or adhesive seals. After long-term use, gaps are prone to appear due to thermal expansion and contraction or filter media vibration. Unfiltered air can infiltrate through the bypass and contaminate the clean airflow. In addition, diffuser plates mostly use planar structures with single-aperture designs. When dealing with high pressure differential conditions, local areas are prone to deformation due to stress concentration, which can damage the seal integrity. This defect is particularly prominent in precision purification scenarios that require continuous operation. Utility Model Content

[0004] The purpose of this utility model is to solve the above defects and provide a high-efficiency filter air outlet. The connecting frame and the positioning side plate adopt the plug-in cooperation method of limiting insert plate and limiting slot, which solves the technical problem that when replacing existing filter materials, multiple sets of connecting parts need to be disassembled and the sealing surface needs to be recalibrated. The operation process relies on professional tools and is time-consuming.

[0005] The objective of this utility model is achieved through the following means:

[0006] A high-efficiency filter air outlet includes a housing. An air inlet seat and an air outlet seat are respectively connected to the upper and lower surfaces of the housing. A connecting frame is added to the center of the inner cavity of the housing. Filter material is installed in the center of the inner cavity of the connecting frame. Limiting plates are added to both sides of the connecting frame. An upper inclined guide frame and a lower inclined guide frame are respectively added to the upper and lower surfaces of the connecting frame. Positioning side plates are slidably connected to both sides of the inner wall of the housing. A limiting slot is opened at the lower part of the inner side of the positioning side plate. The limiting plate is inserted into the limiting slot. The outer sides of the upper and lower inclined guide frames are connected to the inner sides of the positioning side plates. A diffuser plate is added to the lower part of the center of the inner cavity of the housing. The upper surface of the diffuser plate is evenly provided with concentric annular raised textures and vent holes. The vent holes are arranged between adjacent concentric annular raised textures.

[0007] External air enters the inner cavity of the outer shell vertically through the air inlet seat, and the airflow first contacts the upper inclined guide frame on the upper surface of the connecting frame;

[0008] The sloping structure of the upper sloping guide frame guides the vertical airflow into a lateral diffusion mode, so that the air is evenly distributed to the entire filter surface of the filter material.

[0009] The filter material efficiently intercepts particulate matter in the air, and the purified airflow passes through the inner cavity of the connecting frame.

[0010] The lower sloping guide frame receives the filtered airflow, and its sloping structure re-converges the airflow into a vertical direction and guides it to the lower part of the inner cavity of the outer shell.

[0011] When the airflow reaches the diffuser plate, the concentric ring-shaped raised textures radially divide the airflow, forcing the airflow through the vents between adjacent concentric ring-shaped raised textures, and finally discharging it evenly to the air outlet in the form of multiple concentric rings.

[0012] Furthermore, sealing grooves are provided on both the upper and lower surfaces of the outer casing, and sealing blocks are embedded in the inner cavities of the sealing grooves. The sealing blocks are connected to the air inlet seat and the air outlet seat.

[0013] Sealing grooves are pre-cut on the upper and lower surfaces of the outer casing. Then, the sealing block is embedded in the inner cavity of the sealing groove. The sealing block and the sealing groove are completely fitted by mechanical pressing or bonding process. Finally, the connecting end faces of the air inlet seat and the air outlet seat are fixedly connected to the exposed surface of the sealing block to form a closed airflow channel.

[0014] Furthermore, each of the inner walls of the outer shell is provided with a positioning side groove, and the positioning side plate is slidably connected to the positioning side groove. Both the positioning side groove and the positioning side plate are T-shaped designs.

[0015] A positioning side groove is machined at the center of the inner wall of the outer shell. The positioning side groove adopts a T-shaped cross-section design. The positioning side plate is slid into the positioning side groove in the vertical direction. The axial and circumferential limiting connection between the positioning side plate and the outer shell is achieved by the interlocking of the T-shaped structure.

[0016] Furthermore, a flow guide seat is connected to the upper surface of the diffuser plate, and fixing rods are installed around the lower surface of the diffuser plate.

[0017] The flow guide seat is fixed to the center area of ​​the upper surface of the diffuser plate by welding or snap-fit ​​structure; then, fixing rods are installed around the lower surface of the diffuser plate, and the fixing rods adopt an upright layout perpendicular to the plane of the diffuser plate.

[0018] Furthermore, the upper surface of the flow guide seat is provided with fixing holes around all four sides, and the fixing rod is inserted and connected to the fixing holes.

[0019] Fixing holes are made around the upper surface of the flow guide seat, and the hole positions correspond one-to-one with the fixing rod positions of the diffuser plate. During installation, the fixing rod is inserted vertically into the fixing hole and mechanically fixed by interference fit or locking device.

[0020] Furthermore, the vents are distributed outward in a ring shape, and the diameter of the vents gradually decreases from the center to the outside.

[0021] The vents are arranged in a ring array on the surface of the airflow diffusion component. The vent diameter is designed according to the gradient law that the diameter is largest in the central area and gradually decreases towards the outside. After the airflow is initially diffused through the central large-diameter area, it is then uniformly distributed through the outer small-diameter area.

[0022] The beneficial effects of this utility model are: the connecting frame and the positioning side plate adopt the plug-in cooperation method of limiting insert plate and limiting slot, which significantly simplifies the component assembly process. By replacing the complex high-precision docking process with a physical limiting structure, the dependence on processing accuracy is reduced, and the filter material replacement operation can be completed without professional tools, which greatly reduces maintenance time and labor costs.

[0023] The gradual flow channel formed by the upper and lower inclined guide frames, together with the closed flow cavity formed by the positioning side plate, can gradually guide and rectify the incoming airflow, effectively eliminating the local vortex phenomenon caused by right-angle turns in traditional structures. Combined with the radial diffusion effect of the concentric ring-shaped raised texture evenly distributed on the surface of the diffuser plate, the laminar flow characteristics of the outlet airflow are significantly improved, which not only enhances the uniformity of airflow coverage in the space, but also achieves energy-saving operation by reducing turbulent energy loss.

[0024] The close fit between the diffuser plate and the inner wall of the outer shell, combined with the circumferential sealing surface formed by the connecting frame through the inclined guide frame and the positioning side plate, constructs a multi-level sealing protection system. In particular, a gapless sealing structure is formed in the edge area of ​​the filter material, eliminating the risk of unfiltered air bypassing and ensuring that the cleanliness of the outlet air continuously and stably meets the standards.

[0025] The ring-shaped array of raised textures on the diffuser surface and the staggered distribution of vents enhance the structure's resistance to deformation while achieving pressure balance through a multi-pore airflow distribution mechanism. This effectively avoids the sealing failure problem caused by excessive local pressure difference in traditional structures, making it particularly suitable for precision purification scenarios that require maintaining a high level of cleanliness for extended periods. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the air outlet of a high-efficiency filter according to the present invention;

[0027] Figure 2 This is a schematic diagram of the separate structure of the outer shell, air inlet seat, and air outlet seat of a high-efficiency filter according to this utility model;

[0028] Figure 3 This is a cross-sectional view of the outer shell of the air outlet of a high-efficiency filter according to this utility model;

[0029] Figure 4 This is a schematic diagram of the separation structure of the positioning side plate and the connecting frame of the air outlet of a high-efficiency filter according to this utility model;

[0030] Figure 5 This is a schematic diagram of the connection structure between the diffuser plate and the guide seat of the air outlet of a high-efficiency filter according to this utility model;

[0031] Figure 6 This is a schematic diagram of the separation structure of the diffuser plate and the flow guide seat of the air outlet of a high-efficiency filter according to this utility model;

[0032] In the diagram, 1. Outer shell; 2. Air inlet seat; 3. Air outlet seat; 4. Sealing groove; 5. Sealing block; 6. Positioning side groove; 7. Positioning side plate; 8. Limiting slot; 9. Connecting frame; 10. Limiting insert plate; 11. Filter media; 12. Upper inclined guide frame; 13. Lower inclined guide frame; 14. Diffuser plate; 15. Air guide seat; 16. Fixing rod; 17. Fixing hole; 18. Concentric ring-shaped raised texture; 19. Vent hole. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] In this embodiment, refer to Figures 1 to 6The specific implementation of the high-efficiency filter air outlet includes a housing 1. An air inlet seat 2 and an air outlet seat 3 are respectively connected to the upper and lower surfaces of the housing 1. A connecting frame 9 is added to the center of the inner cavity of the housing 1. Filter material 11 is installed in the center of the inner cavity of the connecting frame 9. Limiting plates 10 are added to both sides of the connecting frame 9. An upper inclined guide frame 12 and a lower inclined guide frame 13 are respectively added to the upper and lower surfaces of the connecting frame 9. The inner walls of the housing 1 are slidably connected to... A positioning side plate 7 is attached, and a limiting slot 8 is provided on the lower part of the inner side of the positioning side plate 7. The limiting insert plate 10 is inserted and connected to the limiting slot 8. The outer sides of the upper inclined guide frame 12 and the lower inclined guide frame 13 are connected to the inner side of the positioning side plate 7. A diffuser plate 14 is added to the lower part of the center of the inner cavity of the outer shell 1. The upper surface of the diffuser plate 14 is evenly provided with concentric ring-shaped raised textures 18 and vent holes 19. The vent holes 19 are located between adjacent concentric ring-shaped raised textures 18.

[0035] External air enters the inner cavity of the outer shell 1 vertically through the air inlet seat 2, and the airflow first contacts the upper inclined guide frame 12 on the upper surface of the connecting frame 9;

[0036] The inclined structure of the upper inclined guide frame 12 guides the vertical airflow into a lateral diffusion mode, so that the air is evenly distributed to the entire filter surface of the filter material 11.

[0037] Filter material 11 efficiently intercepts particulate matter in the air, and the purified airflow passes through the inner cavity of the connecting frame 9;

[0038] The lower inclined guide frame 13 receives the filtered airflow, and its inclined structure re-converges the airflow into a vertical direction and guides it to the lower part of the inner cavity of the outer shell 1.

[0039] When the airflow reaches the diffuser plate 14, the concentric ring-shaped raised texture 18 radially divides the airflow, forcing the airflow through the ventilation holes 19 between adjacent concentric ring-shaped raised textures 18, and finally evenly discharged to the air outlet seat 3 in the form of multiple concentric rings.

[0040] The quick positioning and installation of the filter assembly is achieved through the slot-type connection between the positioning side plate 7 and the limiting insert plate 10. The vertical insertion of the limiting slot 8 and the limiting insert plate 10 can prevent the filter material 11 from shifting horizontally, ensuring the long-term stable operation of the filter unit.

[0041] The upper inclined guide frame 12 and the lower inclined guide frame 13 form a two-stage guide structure. The upper inclined guide frame 12 evenly distributes the intake airflow to the surface of the filter material 11, and the lower inclined guide frame 13 gathers and guides the exhaust airflow. The outer side of the two-stage guide frames and the inner side of the positioning side plate 7 form a surface contact seal, which effectively prevents unfiltered air from bypassing.

[0042] The guiding effect of the upper inclined guide frame 12 and the lower inclined guide frame 13 makes a uniform airflow field form on the surface of the filter material 11, avoiding the problem of low utilization rate of filter material 11 caused by concentrated airflow at the edge of traditional filters, thereby increasing the effective filtration area of ​​filter material 11.

[0043] The concentric ring-shaped raised texture 18 of the diffuser plate 14 decomposes the vertical airflow into multi-layer ring-shaped airflow. Combined with the ring array layout of the vents 19, the air velocity gradient is continuously attenuated, which improves the airflow uniformity index compared with the traditional straight-out structure.

[0044] like Figure 2 As shown, sealing grooves 4 are provided on both the upper and lower surfaces of the outer casing 1, and sealing blocks 5 are embedded in the inner cavities of the sealing grooves 4. The sealing blocks 5 are connected to the air inlet seat 2 and the air outlet seat 3.

[0045] Sealing grooves 4 are pre-cut on the upper and lower surfaces of the outer casing 1. Then, the sealing block 5 is embedded in the inner cavity of the sealing groove 4. The sealing block 5 and the sealing groove 4 are completely fitted by mechanical pressing or bonding process. Finally, the connecting end faces of the air inlet seat 2 and the air outlet seat 3 are fixedly connected to the exposed surface of the sealing block 5 to form a closed airflow channel. Through the embedded cooperation of the sealing groove 4 and the sealing block 5, the gap leakage at the connection between the outer casing 1 and the air inlet seat 2 and the air outlet seat 3 is effectively blocked, the airtightness of the equipment is improved, and the risk of energy loss or pollutant spillage caused by airflow leakage is avoided.

[0046] like Figure 3 and Figure 4 As shown, a positioning side groove 6 is provided in the center of the inner wall of the outer shell 1, and the positioning side plate 7 is slidably connected to the positioning side groove 6. Both the positioning side groove 6 and the positioning side plate 7 are T-shaped designs.

[0047] A positioning side groove 6 is machined at the center of the inner wall of the outer shell 1. The positioning side groove 6 adopts a T-shaped cross-section design. The positioning side plate 7 is slid into the positioning side groove 6 in the vertical direction. The axial and circumferential limiting connection between the positioning side plate 7 and the outer shell 1 is achieved through the interlocking of the T-shaped structure. The T-shaped positioning side groove 6 and the positioning side plate 7 cooperate to provide a precise installation guide function, simplify the assembly process, ensure the installation position accuracy of internal components, and prevent structural interference or performance degradation caused by assembly errors.

[0048] like Figure 5 and Figure 6As shown, a flow guide seat 15 is connected to the upper surface of the diffuser plate 14, and fixing rods 16 are installed around the lower surface of the diffuser plate 14. The flow guide seat 15 is fixed to the central area of ​​the upper surface of the diffuser plate 14 by welding or snap-fit ​​structure; then, fixing rods 16 are installed around the lower surface of the diffuser plate 14, and the fixing rods 16 adopt an upright layout perpendicular to the plane of the diffuser plate 14. The integrated design of the flow guide seat 15 and the diffuser plate 14 optimizes the airflow guidance path, and the fixing rods 16 provide multi-point support for the diffuser plate 14, enhancing the structural resistance to deformation, and facilitating quick positioning and assembly with lower-level components. Fixing holes 17 are opened around the upper surface of the flow guide seat 15, and the fixing rods 16 are inserted into the fixing holes 17. Fixing holes 17 are formed around the upper surface of the flow guide seat 15, and the hole positions of the fixing holes 17 correspond one-to-one with the positions of the fixing rods 16 of the diffuser plate 14. During installation, the fixing rods 16 are vertically inserted into the fixing holes 17, and mechanical fixation is achieved through interference fit or locking components. The insertion structure of the fixing rods 16 and the fixing holes 17 forms a dual positioning mechanism, which not only ensures the perpendicularity accuracy between the flow guide seat 15 and the diffuser plate 14, but also prevents loosening of the connection due to long-term vibration through physical limiting, thereby improving the reliability of equipment operation. The vent holes 19 are distributed outward in a ring shape, and the diameter of the vent holes 19 gradually decreases from the center to the outside. The vents 19 are arranged in a ring array on the surface of the airflow diffusion component. The vent diameter design follows the gradient law that the vent diameter is the largest in the central area and gradually decreases towards the outside. After the airflow is initially diffused through the central large-diameter area, it is further homogenized and distributed through the outer small-diameter area. The variable-diameter ring distribution structure of the vents 19 makes the airflow present a pressure gradient that is strong in the center and gradually weakens at the edge, effectively balancing the airflow field distribution and avoiding local turbulence or airflow dead zones. At the same time, the vent diameter decreasing design reduces the direct impact of high-speed airflow on downstream components.

[0049] The usage process of the air outlet of a high-efficiency filter in this embodiment is as follows: The outer shell 1 serves as the main frame, and its upper and lower surfaces are respectively connected to the air inlet seat 2 and the air outlet seat 3. The upper and lower surfaces of the outer shell 1 are pre-opened with sealing grooves 4. After the sealing block 5 is embedded in the sealing groove 4, the sealing block 5 is completely fitted with the sealing groove 4 by mechanical pressing or bonding process. Then, the connecting end faces of the air inlet seat 2 and the air outlet seat 3 are fixedly connected to the exposed surface of the sealing block 5 to form a closed airflow channel. A T-shaped positioning side groove 6 is processed in the center of the inner wall of the outer shell 1. The T-shaped positioning side plate 7 is slid into the positioning side groove 6 in the vertical direction. The axial and circumferential limiting connection is achieved through the T-shaped structure. A limiting slot 8 is opened in the lower part of the inner side of the positioning side plate 7.

[0050] The connecting frame 9 is located at the center of the inner cavity of the outer shell 1, and limiting plates 10 are added on both sides of it. The filter material 11 is installed in the inner cavity of the connecting frame 9. The upper and lower surfaces of the connecting frame 9 are respectively provided with an upper inclined guide frame 12 and a lower inclined guide frame 13. The outer surfaces of the upper inclined guide frame 12 and the lower inclined guide frame 13 form a surface contact seal with the inner surface of the positioning side plate 7. The limiting plate 10 is vertically inserted into the limiting slot 8 of the positioning side plate 7. The filter assembly is quickly positioned and installed through the slot connection. The vertical insertion prevents the filter material 11 from shifting horizontally.

[0051] A diffuser plate 14 is provided at the lower center of the inner cavity of the outer shell 1. A flow guide seat 15 is welded to the upper surface of the diffuser plate 14, and a fixing rod 16 is installed around the lower surface. Fixing holes 17 are opened around the upper surface of the flow guide seat 15. The fixing rod 16 is vertically inserted into the fixing hole 17 and mechanically fixed by interference fit. The upper surface of the diffuser plate 14 is machined with concentric ring-shaped raised texture 18 and vent holes 19. The vent holes 19 are distributed in a ring array and the diameter of the holes decreases layer by layer from the center to the outside.

[0052] External air enters the inner cavity of the outer shell 1 vertically through the air inlet seat 2. The airflow first contacts the upper inclined guide frame 12. The inclined structure of the upper inclined guide frame 12 guides the vertical airflow into a lateral diffusion mode, so that the air is evenly distributed to the entire filter surface of the filter material 11. After the filter material 11 efficiently intercepts the particulate matter in the air, the airflow passes through the inner cavity of the connecting frame 9. The lower inclined guide frame 13 receives the filtered airflow. Its inclined structure re-converges the airflow into a vertical direction and guides it to the lower part of the inner cavity of the outer shell 1.

[0053] When the airflow reaches the diffuser plate 14, the concentric ring-shaped raised texture 18 radially divides the airflow, forcing the airflow to pass through the vents 19 between adjacent concentric ring-shaped raised textures 18. The variable diameter ring distribution structure of the vents 19 makes the airflow present a pressure gradient that is strong in the center and gradually weakens at the edges. Finally, the airflow is evenly discharged to the air outlet seat 3 in the form of multiple concentric rings.

[0054] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A high-efficiency filter air outlet, comprising a housing, wherein an air inlet seat and an air outlet seat are respectively connected to the upper and lower surfaces of the housing, characterized in that: A connecting frame is added to the center of the inner cavity of the outer shell. Filter material is installed in the center of the inner cavity of the connecting frame. Limiting plates are added to both sides of the connecting frame. An upper inclined guide frame and a lower inclined guide frame are added to the upper and lower surfaces of the connecting frame, respectively. Positioning side plates are slidably connected to both sides of the inner wall of the outer shell. A limiting slot is opened at the lower part of the inner side of the positioning side plate. The limiting plate is inserted into the limiting slot. The outer sides of the upper and lower inclined guide frames are connected to the inner sides of the positioning side plates. A diffuser plate is added to the lower part of the center of the inner cavity of the outer shell. Concentric ring-shaped raised textures and vent holes are evenly opened on the upper surface of the diffuser plate. The vent holes are located between adjacent concentric ring-shaped raised textures.

2. The high-efficiency filter air outlet according to claim 1, characterized in that: The upper and lower surfaces of the outer casing are provided with sealing grooves, and sealing blocks are embedded in the inner cavities of the sealing grooves. The sealing blocks are connected to the air inlet seat and the air outlet seat.

3. The high-efficiency filter air outlet according to claim 1, characterized in that: The inner wall of the outer shell is provided with a positioning side groove at its center, and the positioning side plate is slidably connected to the positioning side groove. Both the positioning side groove and the positioning side plate are T-shaped designs.

4. The high-efficiency filter air outlet according to claim 1, characterized in that: The upper surface of the diffuser plate is connected to a flow guide seat, and the lower surface of the diffuser plate is equipped with fixing rods around its perimeter.

5. The high-efficiency filter air outlet according to claim 4, characterized in that: The upper surface of the flow guide seat is provided with fixing holes around all four sides, and the fixing rod is inserted into the fixing holes.

6. The high-efficiency filter air outlet according to claim 1, characterized in that: The vents are arranged in a ring shape and distributed outwards, and the diameter of the vents gradually decreases from the center to the outside.

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