Movable hundred-level clean bench
By designing a portable Class 100 clean bench, combined with multi-stage purification, dynamic adjustment, and linked dust collection units, the problems of clean bench mobility and glove fit were solved, achieving both flexibility and safety in the clean environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEBEI GEO UNIVERSITY
- Filing Date
- 2026-04-07
- Publication Date
- 2026-07-03
AI Technical Summary
Existing clean bench equipment has a fixed structure that is difficult to move, and the fixed size of the operating hole results in gloves not fitting tightly to the arm. In addition, it lacks an effective particulate capture device, which leads to environmental pollution.
The design features a movable Class 100 clean bench equipped with multi-stage purification units, dynamic adjustment units, and linked dust collection units. It can be easily moved via casters, and the size of the operating holes can be dynamically adjusted to fit the arm. It also has a linked dust collection mechanism to capture stray particles.
It enables flexible movement of the clean bench, ensures a close fit between the gloves and the arm, improves operational comfort and sealing, effectively prevents particle diffusion, and maintains a Class 100 cleanliness level in the operating environment.
Smart Images
Figure CN122323286A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of air purification equipment technology, specifically a portable Class 100 clean bench. Background Technology
[0002] Class 100 clean benches are core equipment widely used in medical, pharmaceutical, and scientific research fields. They use high-efficiency filters to create vertical or horizontal unidirectional airflow in local operating areas, enabling the cleanliness of the operating area to reach the international standard ISO 5 (i.e., Class 100). This provides a reliable environmental guarantee for operations with extremely high cleanliness requirements (such as cell culture, sterile preparation dispensing, semiconductor chip production, and pretreatment of geological sample isotope analysis).
[0003] In existing technologies, to meet the requirements of biosafety protection or aseptic operation, some clean benches adopt a "glove box" design, where operators perform operations within a sealed chamber using gloves sealed over the operating port. However, existing clean benches of this type still have the following technical problems in practical applications: First, traditional clean benches are mostly fixed structures, bulky and difficult to move, unable to flexibly adapt to laboratory layout adjustments or the needs of multi-location use; second, the operating port is usually a fixed size, difficult to accommodate the differences in arm size among different operators, resulting in a loose fit between the glove and arm, affecting operational flexibility, or causing the sealed environment of the chamber to be contaminated due to accidental glove damage; finally, during operation, especially when the gloves are frequently moved or when handling powders or volatile reagents, particulate matter is easily generated near the operating port, and existing equipment lacks targeted local capture devices, resulting in the inability to clean up the escaped particles in a timely manner, causing pollution to the experimental environment. Summary of the Invention
[0004] The purpose of this invention is to provide a portable Class 100 clean bench to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A portable Class 100 clean bench includes: A sealed cabinet, wherein the sealed cabinet is provided with an operating cavity, and the operating cavity has several operating holes for gloves in the middle; A multi-stage purification unit, comprising an air supply mechanism and a purification mechanism, wherein the air supply mechanism is used to supply air into the operating chamber and maintain it at positive pressure, and the purification mechanism is used to perform multi-stage purification on the air entering the operating chamber. An exhaust gas treatment unit includes a post-treatment mechanism, an exhaust mechanism, and a return mechanism. The exhaust mechanism is used to discharge air from the operating chamber, the post-treatment mechanism is used to post-treat the discharged air, and the return mechanism is used to input a portion of the post-treated air into the operating chamber. The dynamic adjustment unit includes a position detection mechanism and a dynamic adjustment mechanism. The position detection mechanism is used to detect the position of the glove. Based on the detection result of the position detection mechanism, the dynamic adjustment mechanism adjusts the size of the operating hole so that the glove fits the user's arm. The linked dust collection unit includes an opening mechanism and a dust collection mechanism. The opening mechanism is used to open the corresponding dust collection mechanism according to the position of the dynamic adjustment mechanism. The dust collection mechanism is used to capture the drifting particles in the operating chamber.
[0006] Preferably, the side wall of the sealed cabinet is provided with a transfer window, and the bottom of the sealed cabinet is provided with casters.
[0007] Preferably, the air supply mechanism includes an air supply fan, and the purification mechanism includes a pre-filter, a medium-efficiency filter, and a high-efficiency filter. The pre-filter, the medium-efficiency filter, the air supply fan, and the high-efficiency filter are arranged sequentially along the airflow direction. The high-efficiency filter is fully covered on the top of the operating chamber and is used to deliver clean, vertical, unidirectional airflow into the operating chamber.
[0008] Preferably, the exhaust mechanism includes an exhaust fan, the post-treatment mechanism includes an activated carbon filter module and a silica gel dehumidification module, a return air perforated plate is provided above the air outlet of the operating chamber, and the air outlet of the operating chamber is connected in sequence to the activated carbon filter module, the silica gel dehumidification module and the exhaust fan through pipes.
[0009] Preferably, the return mechanism includes an air outlet pipe, an air volume regulating valve one, an air volume regulating valve two, and a return pipe. The air outlet pipe is connected to the air outlet of the exhaust fan. The air outlet pipe is connected to the air volume regulating valve one and the air volume regulating valve two, respectively. The air volume regulating valve one is connected to the return pipe, and the return pipe is connected to the top of the operating chamber.
[0010] Preferably, the dynamic adjustment mechanism includes a base plate, mounting posts, a limiting plate, a connecting rod, an adjusting block, a limiting pin, a sliding block, and an adjusting push rod. The base plate is disposed in the operating hole and has a through hole. A plurality of mounting posts are disposed in a hollow cavity surrounding the interior of the base plate. The limiting plate is connected to the mounting posts and has a plurality of limiting grooves. The mounting posts are hinged to the connecting rod, and the connecting rod is hinged to the adjusting block. The adjusting block is connected to the sliding block, and adjacent adjusting blocks are linked together through the sliding blocks. The adjusting block is provided with a limiting pin, which is slidably connected to the limiting groove. An adjusting push rod is disposed in one of the limiting grooves, and the adjusting push rod is used to adjust the position of the limiting pin in the limiting groove.
[0011] Preferably, the position detection mechanism includes a number of photoelectric sensors, which are arranged around the substrate.
[0012] Preferably, the adjusting block has a limiting groove, and the sliding block connected to the adjacent adjusting block is slidably connected to the limiting groove. The opening mechanism includes a position sensor, which is disposed on the sliding block.
[0013] Preferably, each of the adjusting blocks is provided with a suction chamber, and the suction chamber has a plurality of suction holes. The suction mechanism includes a pneumatic push rod, a piston block, a suction tube, a connecting ring, a main pipe, and a connecting valve. The pneumatic push rod is disposed in the suction chamber and is used to drive the piston block to move along the suction chamber. Each suction chamber is connected to the suction tube, and the suction tube is connected to the connecting ring. The connecting ring is connected to the main pipe through a pipe, and the main pipe is connected to the activated carbon filter module. The main pipe is connected to the connecting valve.
[0014] Compared with existing technologies, the advantages of this invention are as follows: By incorporating casters at the bottom of the sealed cabinet, this invention enables convenient movement of the equipment, flexibly adapting to the needs of different experimental locations or work scenarios, overcoming the rigid and unadjustable layout of traditional fixed clean benches. Furthermore, by setting up a dynamic adjustment unit (including a position detection mechanism and a dynamic adjustment mechanism), this invention can automatically adjust the size of the operating hole according to the position and size of the operator's arm, ensuring a tight fit of the glove. This design not only improves the comfort of operators of different body types but also effectively ensures the sealing of the operating chamber, maintains a positive pressure environment, and effectively prevents external contaminants from entering. Finally, this invention incorporates a linked dust collection unit (including an opening mechanism and a suction mechanism) that forms a linkage mechanism with the dynamic adjustment unit. When the glove moves (i.e., the dynamic adjustment mechanism moves), the corresponding suction mechanism automatically activates, capturing escaping particles near the operating hole and sending the dust-laden gas to the post-treatment mechanism for purification. This design achieves an active protection mode of "dust removal upon movement," solving the problem that traditional equipment cannot promptly address local contamination sources at the operating port, significantly improving operational safety and environmental cleanliness. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the axial view structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the axial view structure of the present invention. Figure 2 (The cover plate on one side of the sealed cabinet is concealed). Figure 3 This is a schematic diagram of the axial view structure of the present invention. Figure 3 (The high-efficiency filter is concealed); Figure 4 This is a schematic diagram showing the location and structure of the activated carbon filter module and the connecting valve of the present invention; Figure 5 This is a schematic diagram of the connection structure of the post-processing mechanism of the present invention; Figure 6 This is a schematic diagram of the connection structure of each component of the reflux mechanism of the present invention; Figure 7 This is a schematic diagram of the connection structure of the connecting ring, main pipe, and connecting valve of the present invention; Figure 8 This is a schematic diagram showing the positional structure of the glove and substrate of the present invention; Figure 9 This is a schematic diagram showing the positional structure of the substrate and adjustment plate of the present invention; Figure 10 This is a schematic diagram showing the position and structure of the substrate, connecting ring, and connecting valve of the present invention; Figure 11 This is a schematic diagram showing the positions of the mounting column, limiting plate, and limiting groove of the present invention; Figure 12 This is a schematic diagram of the connection structure of the connecting rod, adjusting block, and limiting pin of the present invention; Figure 13 This is a schematic diagram of the connection structure of the connecting rod, adjusting block, suction tube and connecting ring of the present invention; Figure 14 This is a schematic diagram showing the position and structure of the suction tube and the connecting ring of the present invention; Figure 15 This is a schematic diagram of the axial view structure of the adjustment block of the present invention; Figure 16 This is a schematic diagram of the connection structure between the adjusting block and the sliding block of the present invention; Figure 17 This is a schematic diagram of the internal structure of the adjustment block of the present invention (the adjustment block has been rendered in perspective).
[0016] In the diagram: 1. Enclosed cabinet; 2. Operating chamber; 3. Operating hole; 4. Gloves; 5. Casters; 6. Pass-through window; 7. Supply fan; 8. Pre-filter; 9. Medium-efficiency filter; 10. High-efficiency filter; 11. Exhaust fan; 12. Activated carbon filter module; 13. Silica gel dehumidification module; 14. Return air perforated plate; 15. Air outlet duct; 16. Air volume regulating valve one; 17. Air volume regulating valve two; 18. Return pipe; 19. Base plate; 20. Mounting column; 21. Limiting plate; 22. Limiting groove; 23. Connecting rod; 24. Adjusting block; 25. Limiting pin; 26. Sliding block; 27. Adjusting push rod; 28. Photoelectric sensor; 29. Limiting slide groove; 30. Position sensor; 31. Dust suction chamber; 32. Dust suction hole; 33. Pneumatic push rod; 34. Piston block; 35. Dust suction tube; 36. Connecting ring; 37. Main tube; 38. Connecting valve. Detailed Implementation
[0017] 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.
[0018] Please see Figures 1-17 The present invention provides a technical solution: A portable Class 100 clean bench, as per the instruction manual. Figure 1 As shown, it includes: The sealed cabinet 1 has an operating chamber 2. The operating chamber 2 has several operating holes 3 with gloves 4 in the middle. The operating holes 3 are connected to an emergency opening and closing controller (controlled by the pedal in the attached diagram of the instruction manual. Controlling the operating holes 3 by the pedal to open and close them in an emergency is a common technical means, which will not be described in detail here).
[0019] The multi-stage purification unit includes an air supply mechanism and a purification mechanism. The air supply mechanism is used to supply air into the operating chamber 2 and maintain it at positive pressure. The purification mechanism is used to perform multi-stage purification on the air entering the operating chamber 2.
[0020] The exhaust gas treatment unit includes a post-treatment mechanism, an exhaust mechanism, and a return mechanism. The exhaust mechanism is used to discharge the air in the operating chamber 2, the post-treatment mechanism is used to post-treat the discharged air, and the return mechanism is used to input a portion of the post-treated air into the operating chamber 2.
[0021] The dynamic adjustment unit includes a position detection mechanism and a dynamic adjustment mechanism. The position detection mechanism is used to detect the position of the glove 4. Based on the detection result of the position detection mechanism, the dynamic adjustment mechanism adjusts the size of the operating hole 3 so that the glove 4 fits the user's arm.
[0022] The linked dust collection unit includes an opening mechanism and a dust collection mechanism. The opening mechanism is used to open the corresponding dust collection mechanism according to the position of the dynamic adjustment mechanism, and the dust collection mechanism is used to capture the drifting particles in the operating chamber 2.
[0023] The side wall of the sealed cabinet 1 is provided with a transfer window 6. The transfer window 6 is a laminar flow transfer window, which is equipped with a fan filter unit. The bottom of the sealed cabinet 1 is provided with casters 5. The transfer window 6 is used to transfer materials while keeping the operating chamber 2 sealed, so as to prevent outside air from directly entering the operating chamber 2. The casters 5 are installed at the four corners of the bottom of the sealed cabinet 1, so as to facilitate the flexible movement of the entire clean bench to different working positions.
[0024] The air supply mechanism includes an air supply fan 7. In this embodiment, the air supply fan 7 has a multi-level adjustable wind speed, with a maximum wind speed of 3m / s, achieving Class 100 air purification. The purification mechanism includes a pre-filter 8, a medium-efficiency filter 9, and a high-efficiency filter 10. The pre-filter 8, medium-efficiency filter 9, air supply fan 7, and high-efficiency filter 10 are arranged sequentially along the airflow direction. The high-efficiency filter 10 is fully covered on the top of the operating chamber 2. In this embodiment, the high-efficiency filter 10 adopts the H14 grade to ensure that the 0.3μm particle rejection rate is greater than 99.995%. The high-efficiency filter 10 is used to deliver vertical unidirectional airflow into the operating chamber 2. In this embodiment, the pre-filter 8 is G4 grade, used to filter out large dust particles, and the medium-efficiency filter 9 is F8 grade, used to further filter out medium-sized particles. The air supply fan 7 pressurizes the pre-filtered air and sends it into the high-efficiency filter 10. The high-efficiency filter 10 is fully covered on the top of the operating chamber 2 to ensure that the downward airflow is uniform and stable, forming a vertical unidirectional flow, thereby maintaining a Class 100 cleanliness and a positive pressure state in the operating chamber 2.
[0025] The exhaust system includes an exhaust fan 11, and the post-treatment system includes an activated carbon filter module 12 and a silica gel dehumidifier module 13. A return air perforated plate 14 is installed above the air outlet of the operating chamber 2. The air outlet of the operating chamber 2 is connected in sequence to the activated carbon filter module 12, the silica gel dehumidifier module 13, and the exhaust fan 11 via pipes. The return air perforated plate 14 is located at the air outlet at the bottom of the operating chamber 2 to evenly guide airflow into the exhaust duct. The activated carbon filter module 12 is used to adsorb harmful gases or odors generated during operation, and the silica gel dehumidifier module 13 is used to remove moisture from the air to keep the inside of the operating chamber 2 dry. The exhaust fan 11 extracts the treated air.
[0026] The return flow mechanism includes an air outlet duct 15, an air volume regulating valve 16, an air volume regulating valve 17, and a return pipe 18. The air outlet duct 15 is connected to the air outlet of the exhaust fan 11. The air outlet duct 15 is connected to the air volume regulating valve 16 and the air volume regulating valve 17. The air volume regulating valve 16 is connected to the return pipe 18. In this embodiment, the return pipe 18 is connected to the top of the operating chamber 2. In actual use, the return air position of the return pipe 18 can be adjusted according to the actual situation. For example, the return air position of the return pipe 18 can be set between the medium-efficiency filter 9 and the high-efficiency filter 10, so that the clean return air does not need to pass through the primary filter 8 and the medium-efficiency filter 9, thus achieving energy saving. The air outlet duct 15 divides the air discharged from the exhaust fan 11 into two paths: one path enters the return pipe 18 through the air volume regulating valve 16, and the return pipe 18 is connected to the top of the operating chamber 2 to realize air recycling; the other path is discharged to the outside through the air volume regulating valve 17. By adjusting the opening of the two valves, the return air ratio can be controlled, achieving the goals of energy saving and environmental protection.
[0027] The dynamic adjustment mechanism includes a base plate 19, mounting posts 20, a limiting plate 21, a connecting rod 23, an adjusting block 24, a limiting pin 25, a sliding block 26, and an adjusting push rod 27. The base plate 19 is disposed at the operating hole 3 and has a through hole. Several mounting posts 20 are arranged around the hollow cavity inside the base plate 19. The limiting plate 21 is connected to the mounting posts 20 and has several limiting grooves 22. The mounting posts 20 are hinged to the connecting rod 23, and the connecting rod 23 is hinged to the adjusting block 24. The adjusting block 24 is connected to the sliding block 26. Adjacent adjusting blocks 24 are linked to each other through the sliding block 26. The adjusting block 24 is provided with a limiting pin 25, which is slidably connected to the limiting groove 22. An adjusting push rod 27 is disposed in one of the limiting grooves 22 to adjust the position of the limiting pin 25 in the limiting groove 22. The base plate 19 is fixed at the operating hole 3, and its central through hole corresponds to the operating hole 3. Mounting posts 20 are fixed to the hollow cavity inside the base plate 19. A limiting plate 21 is fixed via the mounting posts 20 and has a limiting groove 22. A connecting rod 23 is hinged to each mounting post 20, and an adjusting block 24 is hinged to the other end of the connecting rod 23. A limiting pin 25 is fixed to the adjusting block 24, and the limiting pin 25 is inserted into the corresponding limiting groove 22 and can slide along the groove. Adjacent adjusting blocks 24 are connected to each other via sliding blocks 26, forming a linkage structure. An adjusting push rod 27 is located at the end of one of the limiting grooves 22, and its telescopic end abuts against the limiting pin 25 within the limiting groove 22, pushing the limiting pin 25 to move along the limiting groove 22, thereby driving all adjusting blocks 24 to move radially synchronously, changing the diameter of the operating hole 3.
[0028] The position detection mechanism includes photoelectric sensors 28, and several photoelectric sensors 28 are arranged around the substrate 19. The multiple photoelectric sensors 28 are arranged around the circumference of the substrate 19 to detect the position and size of the user's arm inserted into the operating hole 3, and send the detection signal to the controller.
[0029] The adjusting block 24 has a limiting groove 29, and the sliding block 26 connected to the adjacent adjusting block 24 is slidably connected to the limiting groove 29. The opening mechanism includes a position sensor 30, which is disposed on the sliding block 26. The limiting groove 29 on the adjusting block 24 allows the sliding block 26 on the adjacent adjusting block 24 to be embedded in the groove, realizing linkage and guidance between the adjacent adjusting blocks 24. The position sensor 30 is mounted on the sliding block 26 or the adjusting block 24 to detect the movement state of the adjusting block 24. When the adjusting block 24 moves, the position sensor 30 generates a trigger signal.
[0030] Each adjusting block 24 is provided with a suction chamber 31, which has several suction holes 32. The suction mechanism includes a pneumatic push rod 33, a piston block 34, a suction tube 35, a connecting ring 36, a main pipe 37, and a connecting valve 38. The pneumatic push rod 33 is located in the suction chamber 31 and is used to drive the piston block 34 to move along the suction chamber 31. Each suction chamber 31 is connected to a suction tube 35, which is a flexible hose. The suction tubes 35 are all connected to the connecting ring 36. The connecting ring 36 is connected to the activated carbon filter module 12 through the main pipe 37, which is connected to the connecting valve 38. Each adjusting block 24 has a suction chamber 31 inside, and the suction chamber 31 has multiple tiny suction holes 32 on the side facing the operating chamber 2. The suction chamber 31 is equipped with a piston block 34 and a pneumatic push rod 33. The pneumatic push rod 33 drives the piston block 34 to reciprocate, causing the suction holes 32 at different positions to open. Each suction chamber 31 is connected to a connecting ring 36 via a flexible suction tube 35. The connecting ring 36 is connected to a main pipe 37 via a pipe. One end of the main pipe 37 is connected to the air inlet of the activated carbon filter module 12. A connecting valve 38 is installed on the main pipe 37, which is used to control the opening and closing of the suction passage.
[0031] Working principle: After the equipment is started, the air supply fan 7 operates, and the outside air is filtered sequentially through the pre-filter 8, medium-efficiency filter 9, and high-efficiency filter 10, and then sent into the operating chamber 2 in a vertical unidirectional flow to achieve a Class 100 cleanliness level and maintain positive pressure. The operator inserts their hand into the glove 4 through the operating hole 3 to operate the equipment. At this time, the photoelectric sensor 28 surrounding the base plate 19 detects the position and size of the arm. The controller drives the adjustment push rod 27 to extend and retract according to the detection signal, pushing the limit pin 25 to move along the limit groove 22. Through the connecting rod 23, all the adjustment blocks 24 move radially in sync, thereby adjusting the diameter of the operating hole 3. The radial movement of the adjustment block 24 directly acts on the edge of the glove 4. When the diameter of the operating hole 3 is reduced to match the outer diameter of the arm, the glove 4 naturally fits the arm, ensuring a tight seal and comfort.
[0032] During the movement of the adjusting block 24, the position sensor 30 installed on the sliding block 26 detects the motion signal and triggers the linkage dust collection unit. At this time, the connecting valve 38 opens, and the pneumatic push rod 33 in each dust collection chamber 31 drives the piston block 34 to move, generating negative pressure in the dust collection chamber 31 through the exhaust fan 11. The dust particles that may be generated near the operating hole 3 in the operating chamber 2 due to arm movement are sucked into the dust collection chamber 31 through the dust collection hole 32. The gas carrying the particles is pressed into the activated carbon filter module 12 through the dust collection tube 35, connecting ring 36, and main tube 37, where the particles are trapped and filtered, thereby achieving active capture of the escaped particles and preventing contamination of the core clean area.
[0033] The exhaust gas generated during operation is evenly guided through the air outlet at the bottom of the operating chamber 2 and the return air perforated plate 14. It then passes sequentially through the activated carbon filter module 12 to adsorb harmful gases, the silica gel dehumidification module 13 to remove moisture, and is finally extracted by the exhaust fan 11. The treated air is split through the outlet duct 15: one part returns to the top of the operating chamber 2 for recirculation via the airflow regulating valve 16 and the return pipe 18, while the other part is discharged outdoors via the airflow regulating valve 17. By adjusting the opening of different airflow regulating valves, the recirculation and emission ratio can be flexibly controlled, achieving energy saving and environmental protection. The entire system, through dynamic adjustment and coordinated dust collection, ensures that the operating table maintains a Class 100 cleanliness level at all times and effectively prevents the diffusion of particles during operation.
[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A portable Class 100 clean bench, characterized in that, include: A sealed cabinet, wherein the sealed cabinet is provided with an operating cavity, and the operating cavity has several operating holes for gloves in the middle; A multi-stage purification unit, comprising an air supply mechanism and a purification mechanism, wherein the air supply mechanism is used to supply air into the operating chamber and maintain it at positive pressure, and the purification mechanism is used to perform multi-stage purification on the air entering the operating chamber. An exhaust gas treatment unit includes a post-treatment mechanism, an exhaust mechanism, and a return mechanism. The exhaust mechanism is used to discharge air from the operating chamber, the post-treatment mechanism is used to post-treat the discharged air, and the return mechanism is used to input a portion of the post-treated air into the operating chamber. The dynamic adjustment unit includes a position detection mechanism and a dynamic adjustment mechanism. The position detection mechanism is used to detect the position of the glove. Based on the detection result of the position detection mechanism, the dynamic adjustment mechanism adjusts the size of the operating hole so that the glove fits the user's arm. The linked dust collection unit includes an opening mechanism and a dust collection mechanism. The opening mechanism is used to open the corresponding dust collection mechanism according to the position of the dynamic adjustment mechanism. The dust collection mechanism is used to capture the drifting particles in the operating chamber.
2. The portable Class 100 clean bench according to claim 1, characterized in that: The sealed cabinet has a pass-through window on its side wall and casters at the bottom.
3. The portable Class 100 clean bench according to claim 1, characterized in that: The air supply mechanism includes an air supply fan, and the purification mechanism includes a pre-filter, a medium-efficiency filter, and a high-efficiency filter. The pre-filter, the medium-efficiency filter, the air supply fan, and the high-efficiency filter are arranged sequentially along the airflow direction. The high-efficiency filter is fully covered on the top of the operating chamber and is used to deliver clean, vertical, unidirectional airflow into the operating chamber.
4. A portable Class 100 clean bench according to claim 1, characterized in that: The exhaust mechanism includes an exhaust fan, the post-treatment mechanism includes an activated carbon filter module and a silica gel dehumidification module, a return air perforated plate is provided above the air outlet of the operating chamber, and the air outlet of the operating chamber is connected in sequence to the activated carbon filter module, the silica gel dehumidification module and the exhaust fan through pipes.
5. A portable Class 100 clean bench according to claim 4, characterized in that: The return flow mechanism includes an air outlet pipe, an air volume regulating valve one, an air volume regulating valve two, and a return flow pipe. The air outlet pipe is connected to the air outlet of the exhaust fan. The air outlet pipe is connected to the air volume regulating valve one and the air volume regulating valve two, respectively. The air volume regulating valve one is connected to the return flow pipe, and the return flow pipe is connected to the top of the operating chamber.
6. A portable Class 100 clean bench according to claim 4, characterized in that: The dynamic adjustment mechanism includes a base plate, mounting posts, a limiting plate, a connecting rod, an adjusting block, a limiting pin, a sliding block, and an adjusting push rod. The base plate is disposed in the operating hole and has a through hole. Several mounting posts are disposed around the hollow cavity inside the base plate. The limiting plate is connected to the mounting posts and has several limiting grooves. The connecting rod is hinged to the mounting posts, and the connecting rod is hinged to the adjusting block. The adjusting block is connected to the sliding block, and adjacent adjusting blocks are linked to each other through the sliding blocks. The adjusting block is provided with a limiting pin, which is slidably connected to the limiting groove. An adjusting push rod is disposed in one of the limiting grooves, and the adjusting push rod is used to adjust the position of the limiting pin in the limiting groove.
7. A portable Class 100 clean bench according to claim 6, characterized in that: The position detection mechanism includes photoelectric sensors, and several photoelectric sensors are arranged around the substrate. When the photoelectric sensors detect the position and size of the user's arm, the adjusting push rod extends and retracts, pushing the limiting pin to move along the limiting groove. The connecting rod drives all the adjusting blocks to move radially synchronously. The radial movement of the adjusting blocks directly acts on the edge of the glove. When the diameter of the operating hole is reduced to match the outer diameter of the arm, the glove fits the user's arm.
8. A portable Class 100 clean bench according to claim 6, characterized in that: The adjusting block has a limiting groove, and the sliding block connected to the adjacent adjusting block is slidably connected to the limiting groove. The opening mechanism includes a position sensor, which is disposed on the sliding block.
9. A portable Class 100 clean bench according to claim 6, characterized in that: Each of the adjusting blocks is provided with a suction chamber, and the suction chamber has a plurality of suction holes. The suction mechanism includes a pneumatic push rod, a piston block, a suction tube, a connecting ring, a main pipe, and a connecting valve. The pneumatic push rod is disposed in the suction chamber and is used to drive the piston block to move along the suction chamber. Each suction chamber is connected to the suction tube, and the suction tube is connected to the connecting ring. The connecting ring is connected to the main pipe through a pipe, and the main pipe is connected to the activated carbon filter module. The main pipe is connected to the connecting valve.