High-efficiency filter leak detection device capable of preventing airflow disturbance

Abstract

The utility model relates to the technical field of filter leak detection, and provides an airflow disturbance prevention high-efficiency filter leak detection device which is formed by connecting a plurality of telescopic baffles end to end through flexible hinges in a surrounding mode, and fixing pieces connected with the surface of a high-efficiency filter frame are fixed to the tops of the telescopic baffles. The utility model has the beneficial effects that the phenomenon of misjudgment of a detection result caused by a frame area of the high-efficiency filter is avoided, the plurality of telescopic baffles are rotationally connected through the flexible hinges to form a foldable structure, the problems that the traditional baffles are tedious to install and are inconvenient to carry in a business trip of an inspection unit are solved, and the baffle adopts the telescopic structure and is convenient to use. And a single set of device can cover most of the sizes of the high-efficiency filters, so that the purchase cost of a user is reduced.

Description

A high-efficiency filter leak detection device to prevent airflow disturbance Technical Field

[0001] This utility model relates to the technical field of filter leak detection, specifically to a high-efficiency filter leak detection device that prevents airflow disturbance. Background Technology

[0002] Cleanliness is a crucial indicator for evaluating the overall performance of a cleanroom. HEPA filters, as the last line of defense against particulate matter entering the cleanroom, directly impact whether the cleanroom meets requirements due to their performance and the quality of their installation. HEPA filter leaks can lead to an increase in the number of dust particles, preventing the cleanroom from reaching the predetermined cleanliness level and posing a risk to products manufactured within. Therefore, leak detection of HEPA filters is necessary to ensure their integrity and prevent leaks.

[0003] Commonly used methods for leak detection of HEPA filters include photometry and particle counter methods. However, during testing, it was found that when the sampling port was moved to the airflow dead zone, such as the filter frame and its mounting frame, the dust concentration measured by the instrument was significantly higher, indicating a filter leak. However, the actual HEPA filter was completely sealed and there was no leak. Therefore, it can be concluded that the frame area of ​​the HEPA filter can cause misjudgments in the test results. Summary of the Invention

[0004] This invention proposes a high-efficiency filter leak detection device that prevents airflow disturbance, avoiding misjudgments of test results caused by the frame area of ​​the high-efficiency filter. Multiple telescopic baffles are rotatably connected by flexible hinges to form a foldable structure, solving the problems of cumbersome installation of traditional baffles and inconvenience for inspection units to carry when traveling. The baffles adopt a telescopic structure, and a single set of devices can cover most high-efficiency filter sizes, reducing the user's procurement cost.

[0005] Therefore, the technical solution adopted is as follows:

[0006] A leak detection device for a high-efficiency filter that prevents airflow disturbance consists of several telescopic baffles connected end to end by flexible hinges, and each telescopic baffle has a fixing member fixed to the top of it and connected to the surface of the high-efficiency filter frame.

[0007] A further technical solution is that the flexible hinge has a self-locking function.

[0008] A further technical solution is that the first telescopic baffle and the last telescopic baffle are connected by a fixing buckle.

[0009] A further technical solution is that the telescopic baffle includes a second baffle and two first baffles located on both sides of the second baffle and slidably connected thereto.

[0010] A further technical solution is that the second baffle is provided with a horizontally arranged sliding groove, and the first baffle is fixed with a slider that matches the sliding groove.

[0011] A further technical solution is that the fixing component includes a silicone friction pad and multiple micro suction cups.

[0012] A further technical solution is that the fixing element is a magnetic strip.

[0013] A further technical solution is that sealing strips are fixed to the inner side of the corners where the telescopic baffles connect to each other and to the top gap where the telescopic baffles connect to the high-efficiency filter.

[0014] A further technical solution is that an antistatic material is attached to the inner wall of the telescopic baffle.

[0015] The working principle and beneficial effects of this application are as follows:

[0016] 1. Multiple telescopic baffles are fixed to the frame of the HEPA filter to prevent airflow disturbance in the frame area from causing misjudgment of leak detection results when the HEPA filter is leak-tested.

[0017] 2. Multiple telescopic baffles are connected by flexible hinges to form a foldable structure, which solves the problems of cumbersome installation of traditional baffles and inconvenience for inspection units to carry them when traveling.

[0018] 3. The telescopic baffle can change its length to adapt to different usage needs. A single unit can cover most HEPA filter sizes, reducing user procurement costs. Attached Figure Description

[0019] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 is a schematic diagram of the overall structure of this application;

[0021] Figure 2 is a structural schematic diagram of the telescopic baffle described in this application;

[0022] Figure 3 is a schematic diagram of the disassembled structure of the telescopic baffle described in this application;

[0023] Figure 4 is an enlarged structural diagram of part A in Figure 3.

[0024] In the diagram: 1. Telescopic baffle; 11. First baffle; 12. Second baffle; 13. Slider; 14. Slide groove; 15. Sealing strip; 2. Flexible hinge; 3. Fixing component; 31. Silicone friction pad; 32. Miniature suction cup; 4. Fixing buckle. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] As shown in Figures 1-4, a high-efficiency filter leak detection device for preventing airflow disturbance consists of several telescopic baffles 1 connected end to end by flexible hinges 2. Each telescopic baffle 1 has a fixing member 3 fixed to the top of it and connected to the surface of the high-efficiency filter frame.

[0027] In this embodiment, multiple telescopic baffles 1 are rotatably connected by flexible hinges 2 to form a foldable structure, which is suitable for leak testing scenarios of end-of-line HEPA filters in pharmaceutical cleanrooms. To facilitate the carrying of the testing agency when conducting tests outside the facility and improve testing efficiency, the fasteners 3 are connected to the surface of the HEPA filter frame, and vertical baffles are added around the filter to reduce the impact of airflow entrainment on the indoor air assembly.

[0028] The flexible hinge 2 has a self-locking function. It can stably restrict the device to a fixed angle during use, making the overall structure more stable and convenient to use or carry, whether in use or during storage. Furthermore, the first telescopic baffle 1 and the last telescopic baffle 1 are connected by a fixing buckle 4, allowing for easy disassembly and installation.

[0029] As shown in Figure 3, the telescopic baffle 1 includes a second baffle 12 and two first baffles 11 located on both sides of the second baffle 12 and slidably connected thereto. The second baffle 12 has a horizontally arranged sliding groove 14, and the first baffles 11 have sliders 13 that match the sliding groove 14 fixed on them.

[0030] In this embodiment, by adopting a telescopic structure, it can adapt to HEPA filters of different sizes for leak detection. A single set of equipment can cover most HEPA filter sizes, reducing the user's procurement costs. Through the design of the slider 13 and the slide groove 14, and the fact that the slider 13 and the slide groove 14 can be interference-fitted, it supports quick adjustment and fixation of the telescopic baffle 1, making it convenient for use and storage.

[0031] As shown in Figures 3 and 4, the fixing component 3 includes a silicone friction pad 31 and multiple micro suction cups 32. By arranging multiple micro suction cups 32 on the top of the telescopic baffle 1 and manually pressing the exhaust valve to create negative pressure, initial fixing is achieved. Furthermore, the silicone friction pad 31 integrated around the micro suction cups 32 generates molecular adsorption force when in contact with the surface of the high-efficiency filter frame, enhancing anti-slip capability. The micro suction cups 32 are made of silicone material, and the silicone friction pad 31 is made of nano-silicone material with a micro-protrusion structure on its surface.

[0032] In another embodiment, the fixing member 3 is set as a magnetic strip. The magnetic strip is detachably embedded in the top of the telescopic baffle 1 and is magnetically attracted to the surface of the filter frame. The magnetic strip is made of high-strength neodymium iron boron magnet. Furthermore, the above two embodiments can be used in combination and arranged together on the top of the telescopic baffle 1 to accommodate more connection situations and achieve full-scene coverage of detection.

[0033] To ensure airtightness during testing, sealing strips 15 are fixed to the inner corners where the telescopic baffles 1 connect and at the top gap where the telescopic baffles 1 connect to the HEPA filter. Meanwhile, the flexible hinges are covered with corrugated silicone sleeves, which return to their original shape after unfolding, further ensuring airtightness. Furthermore, a guide angle can be set on the inner side of the telescopic baffles 1 to guide the airflow parallel to the filter surface, thereby reducing eddies, overcoming the limitations of simple physical obstruction, and actively optimizing the airflow path. Additionally, to prevent ion adsorption, antistatic materials, such as high-strength nylon cloth or polyurethane film, are attached to the inner wall of the telescopic baffles 1.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-efficiency filter leak detection device for preventing airflow disturbance, characterized in that: It is formed by connecting several telescopic baffles (1) end to end through flexible hinges (2), and each telescopic baffle (1) has a fastener (3) fixed to the top of it and connected to the surface of the high-efficiency filter frame.

2. The high efficiency filter leak detection device of claim 1, wherein, The flexible hinge (2) has a self-locking function.

3. The high-efficiency filter leak detection device for preventing airflow disturbance according to claim 1, characterized in that, The first telescopic baffle (1) and the last telescopic baffle (1) are connected by a fixing buckle (4).

4. The high-efficiency filter leak detection device for preventing airflow disturbance according to claim 1, characterized in that, The telescopic baffle (1) includes a second baffle (12) and two first baffles (11) located on both sides of the second baffle (12) and slidably connected thereto.

5. The high-efficiency filter leak detection device for preventing airflow disturbance according to claim 4, characterized in that, The second baffle (12) has a horizontally arranged sliding groove (14), and the first baffle (11) has a slider (13) that matches the sliding groove (14).

6. The high efficiency particulate air (HEPA) filter leak detection device of claim 1, wherein, The fastener (3) includes a silicone friction pad (31) and multiple micro suction cups (32).

7. The high-efficiency filter leak detection device for preventing airflow disturbance according to claim 1, characterized in that, The fastener (3) is a magnetic strip.

8. The high-efficiency filter leak detection device for preventing airflow disturbance according to claim 1, characterized in that, Sealing strips (15) are fixed to the inner corners where the telescopic baffles (1) connect to each other and to the top gaps where the telescopic baffles (1) connect to the high-efficiency filter.

9. A high-efficiency filter leak detection device for preventing airflow disturbance according to claim 1, characterized in that, The inner wall of the telescopic baffle (1) is covered with antistatic material.

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