A cleanroom low-noise air supply system

Abstract

This application discloses a low-noise air supply system for cleanrooms, comprising an air supply power module, a silencing module, and an air outlet module. The silencing module includes a housing, connecting pipes, two noise sensors, and a noise reduction mechanism. Two connecting pipes are provided, each located at an opening at one end of the housing. The two noise sensors are respectively located at both ends of the housing. The noise reduction mechanism includes two square plates, four outer micro-perforated plates, and four inner micro-perforated plates. The four outer micro-perforated plates and two square plates form an outer noise reduction cavity, and the four inner micro-perforated plates, four outer micro-perforated plates, and two square plates form an inner noise reduction cavity. The noise reduction mechanism also includes multiple partitions that divide the outer and inner micro-perforated plates into multiple unit plates, which are connected by a connecting mechanism. The low-noise air supply system provided by this application can achieve noise reduction effects at different noise frequencies depending on different air supply conditions.

Description

Technical Field

[0001] This application relates to the field of cleanroom air supply technology, and in particular to a low-noise air supply system for cleanrooms. Background Technology

[0002] Currently, clean operating rooms are mostly used in internal medicine surgeries. By modifying the air supply system, the air is purified and sterilized, reducing the bacterial and pathogen content in the operating room, thereby achieving aseptic protection and preventing intraoperative infections that could affect the success and efficiency of the surgery. Conventional side-mounted air supply ceilings require significant space on the ceiling side. In situations with complex beams and columns on the ceiling, it is difficult to lay ventilation ducts, making side-mounted installation impractical. Therefore, this application proposes a top-mounted installation method for the air supply ceiling, reducing the space occupied on the ceiling side.

[0003] When installing a ceiling with top-mounted air supply, a damping mesh is used to even out the airflow at the outlet, ensuring uniform airflow velocity and reducing concentrated airflow from a single point. However, the top-mounted method significantly shortens the distance from the air supply end to the outlet. Since conventional ductwork for airflow guidance involves deceleration and noise reduction, the shortened ductwork necessitates higher noise reduction requirements at the initial air supply end, leading to the improvement of the silencer module.

[0004] The improvement of the silencer module lies not only in the fact that the silencer uses double-layer steel plates to form a sound-absorbing cavity and the inner steel plate is densely covered with sound-absorbing holes, but also in the fact that the wind noise generated is different depending on the air volume. The difference in wind noise is that the noise wavelength generated at different wind speeds is different. In order for the silencer to achieve the best sound absorption effect, the thickness of the cavity needs to be an odd multiple of 1 / 4 of the noise wavelength to achieve a good sound absorption effect. Moreover, the thicker the cavity, the better the sound absorption effect.

[0005] Regarding the aforementioned technologies, the inventors believe that the following defects exist: the thickness of the cavity is fixed during the initial planning process, but during actual construction, due to the difference in air intake volume of each cleanroom, the parameters of each silencing module will also have slight differences. These slight differences are easily overlooked during on-site construction. The thickness of the first and second silencing cavities is often fixed, which is determined from the construction planning stage. However, the difference in actual air intake volume in different areas results in differences in noise frequency, affecting the noise reduction effect of the entire cleanroom air supply system. Summary of the Invention

[0006] To address the issue of the inability to adjust the noise reduction zone according to different air intake volumes, this application provides a low-noise air supply system for clean rooms.

[0007] The low-noise air supply system for cleanrooms provided in this application adopts the following technical solution:

[0008] A low-noise air supply system for cleanrooms includes an air supply power module, a noise reduction module, and an air outlet module. The noise reduction module includes a housing, connecting pipes, two noise sensors, and a noise reduction mechanism. The connecting pipes are configured as two and are located at the openings at both ends of the housing. The two noise sensors are respectively located at both ends of the housing.

[0009] The noise reduction mechanism includes two square plates, four outer micro-perforated plates, and four inner micro-perforated plates. The four outer micro-perforated plates and the two square plates form an outer noise reduction cavity, and the four inner micro-perforated plates, the four outer micro-perforated plates, and the two square plates form an inner noise reduction cavity.

[0010] The noise reduction mechanism also includes multiple partitions that are evenly spaced along the length of the outer micro-perforated plate. The multiple partitions divide the outer micro-perforated plate and the inner micro-perforated plate into multiple unit plates, and the multiple unit plates are connected to each other by a connecting mechanism.

[0011] The two outer micro-perforated plates and the two inner micro-perforated plates distributed in the vertical direction move in the vertical direction, and the length of the two outer micro-perforated plates in the horizontal direction is greater than the length of the two outer micro-perforated plates distributed in the vertical direction.

[0012] The outer micro-perforated plate slides vertically via a transmission mechanism, while the inner micro-perforated plate slides vertically along the square plate via an adjustment mechanism.

[0013] Optionally, the transmission mechanism includes a lead screw, a limiting rod, two sliders, a power component for controlling the rotation of the lead screw, and a sealing component for filling the gap between the top of the square plate and the outer micro-perforated plate. The lead screw and the limiting rod are respectively located at both ends of the outer micro-perforated plate. The lead screw is rotatably connected to the outer shell, and the limiting rod is fixedly connected to the outer shell. The two sliders are respectively located at both ends of the outer micro-perforated plate. The sliders are helically engaged with the lead screw, and the other slider is sleeved and slides outside the limiting rod.

[0014] Optionally, the power assembly includes a power rod, multiple power blades, and a control unit for controlling the blade area. The power rod is coaxially fixed with the lead screw, and the multiple power blades are fixed at equal intervals on the outer peripheral wall of the power rod, with the blade plane facing the air delivery direction.

[0015] Optionally, the control unit includes two relatively sliding control plates, two racks, a gear, and a control component. The two racks are respectively slidably mounted on the power blade, and the two racks are respectively fixedly connected to the two control plates. The gear rotates on the power blade, and the control plates move along the width direction of the power blade. The power blade is also provided with a limiting component to restrict the rotation of the gear.

[0016] Optionally, the control component is set as a first impeller, the axis of which is along the air supply direction, and the first impeller is fixed coaxially with the gear.

[0017] Optionally, the sealing assembly includes a sealing plate, a first electromagnet, and sealing portions for sealing both sides of the outer micro-perforated plate. The square plate is provided with a sealing cavity, the top of which is open. The sealing plate slides within the sealing cavity. The top of the sealing plate is provided with a mounting hole. The first electromagnet is installed in the mounting hole and attracts the outer micro-perforated plate.

[0018] Optionally, the sealing part includes an adhesive attachment, a shaping component for shaping the adhesive attachment, and a winding assembly for winding the adhesive attachment. The shaping component is used to adhere the end of the adhesive attachment to the bottom surface of the outer micro-perforated plate, corresponding to the adhesion of both the outer micro-perforated plate and the sealing plate.

[0019] Optionally, the shaping component includes a shaping block and an inflatable airbag. The shaping block is fixed at the angle of the outer micro-perforated plate, and there are gaps between the shaping block and the sealing plate and the side wall of the outer shell. The inside of the shaping block is set as a cavity. The inflatable airbag is inflated by an external air-filling device. The inflatable airbag adheres the adhesive to the sealing plate and the side wall of the corresponding outer micro-perforated plate.

[0020] Optionally, the adjustment mechanism is set in two sets and located at both ends of the inner micro-perforated plate. The adjustment mechanism includes two guide rails and a slide rod. The guide rails are arranged vertically, and the two ends of the slide rod are respectively sleeved on the two guide rails. One end of the two guide rails is connected to the positive and negative terminals of the same external power supply, and the two ends of the same guide rail are connected to the positive and negative terminals of two different external power supplies. The slide rod is connected to the end of the inner micro-perforated plate.

[0021] Optionally, the connecting mechanism includes multiple third electromagnets and multiple fourth electromagnets. Connecting grooves are provided on both sides of the partition. The two ends of the unit plate are respectively connected to the third electromagnet and the fourth electromagnet. The third electromagnet and the fourth electromagnet correspond to each other and attract each other. The third electromagnet or the fourth electromagnet slides and adapts to the connecting groove.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The air supply power module first supplies air into the outer noise reduction cavity. Noise passes through the outer noise reduction cavity and the inner micro noise reduction cavity and resonates, thereby achieving the purpose of noise reduction and silencing. In this embodiment, the ratio between the outer noise reduction cavity and the inner noise reduction cavity can be controlled according to the amount of air supplied, i.e. the amount of noise generated. In this embodiment, the initial state of the inner noise reduction cavity thickness: outer noise reduction cavity thickness is 50:150. However, the difference in the actual air intake volume in different areas generates different noise frequencies, affecting the noise reduction effect of the entire cleanroom air supply system. Therefore, the cavity thickness is set to be adjustable. When it is necessary to fine-tune the thickness of the inner noise reduction cavity or the outer noise reduction cavity, it is necessary to adjust the position between the outer micro-perforated plate and the inner micro-perforated plate until the best silencing effect is achieved.

[0024] 2. When the inner micro-perforated plate needs to move, a power source is turned on, allowing power to flow through the two guide rails and the slide rod. The two guide rails, the slide rod, and the external DC power source form a closed loop. Based on the current flow direction and Ampere's law, the direction of the magnetic field lines within the range of the two guide rails and the slide rod near the energized power source can be obtained. Then, using the left-hand rule, the direction of the Ampere force on the slide rod is parallel to the guide rail and along the length of the detection frame. That is, when the guide rail is energized, the slide rod is subjected to the Ampere force and moves vertically along the guide rail, thereby driving the inner micro-perforated plate to move. When the inner micro-perforated plate needs to move in the opposite direction, this power source can be turned off and another power source can be turned on. At this time, the slide rod moves in the opposite direction, thereby controlling the inner micro-perforated plate to move downwards, thus achieving the adjustment effect of the inner noise reduction cavity.

[0025] 3. The restriction on the power rod needs to be released only when the position of the outer micro-perforated plate needs to be adjusted. Since the outer micro-perforated plate does not need to move downward under normal circumstances, but in order to ensure that the outer micro-perforated plate can also move in the vertical direction, the lead screw can be replaced with a two-way lead screw, thereby realizing the reciprocating motion of the outer micro-perforated plate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0027] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0028] Figure 3 This is a schematic diagram of the outer shell and the enclosure component in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the inner micro-perforated plate, guide rail, and slide rod in an embodiment of this application;

[0030] Figure 5This is a cross-sectional schematic diagram of the sealing part in an embodiment of this application.

[0031] Reference numerals: 1. Outer shell; 2. Connecting pipe; 3. Square plate; 4. Outer micro-perforated plate; 5. Inner micro-perforated plate; 6. Outer noise reduction cavity; 7. Inner noise reduction cavity; 8. Partition; 9. Lead screw; 10. Limiting rod; 11. Slider; 12. Power rod; 13. Power blade; 14. Control plate; 15. Rack; 16. Gear; 17. First impeller; 18. Limiting component; 19. Sealing plate; 20. First electromagnet; 21. Sealing cavity; 22. Mounting hole; 23. Adhesive attachment; 24. Winding roller; 25. Winding motor; 26. Shaping block; 27. Inflatable airbag; 28. Guide rail; 29. ​​Slide rod; 30. Third electromagnet; 31. Fourth electromagnet. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a low-noise air supply system for cleanrooms. (Refer to...) Figures 1-5 A cleanroom low-noise air supply system includes an air supply power module, a noise reduction module, and an air outlet module connected in sequence. The noise reduction module includes a housing 1, a connecting pipe 2, two noise sensors, and a noise reduction mechanism. The connecting pipe 2 is configured as two pipes, which are respectively located at the two ends of the housing 1. The two noise sensors are respectively located at the two ends of the housing 1.

[0034] The air supply power module is set to the existing air conditioning module for air supply. The air outlet module is set to the air supply ceiling, and the airflow at the air outlet is evenly distributed by setting a damping mesh (flow equalization film), so that the air velocity at the air supply ceiling outlet is uniform and the airflow is reduced from being blown out from a certain point in the air supply ceiling; the noise reduction module is used to reduce the noise at the air supply end, thereby improving the quiet environment of the hospital clean room.

[0035] Two connecting pipes 2 are respectively connected to the air supply end and air outlet end via flanges, thus connecting to the air outlet module and the air supply power module respectively. Two noise sensors are used to quantitatively identify the noise generated at the air inlet and outlet ends. Alternatively, the noise data obtained from the noise sensors can be displayed on the screen via the controller. By comparing the noise from the two noise sensors, it can be determined whether the noise at the air outlet end meets the standard. If the value obtained from the noise sensor at the air outlet end exceeds the set value, the noise reduction mechanism needs to be modified to reduce the noise.

[0036] The noise reduction mechanism includes two square plates 3, four outer micro-perforated plates 4 and four inner micro-perforated plates 5. The four outer micro-perforated plates 4 and the two square plates 3 form an outer noise reduction cavity 6, and the four inner micro-perforated plates 5, the four outer micro-perforated plates 4 and the two square plates 3 form an inner noise reduction cavity 7.

[0037] The air supply power module first supplies air into the outer noise reduction cavity 6. The noise passes through the outer noise reduction cavity 6 and the inner micro noise reduction cavity and resonates, thereby achieving the purpose of noise reduction and silencing. In this embodiment, the ratio between the outer noise reduction cavity 6 and the inner noise reduction cavity 7 can be controlled according to the amount of air supplied, i.e. the amount of noise generated. In this embodiment, the thickness of the inner noise reduction cavity 7 to the outer noise reduction cavity 6 is 50:150 in the initial state. However, the difference in the actual air intake volume in different areas results in different noise frequencies, affecting the noise reduction effect of the entire cleanroom air supply system.

[0038] Therefore, by setting the cavity thickness to be adjustable, when it is necessary to fine-tune the thickness of the inner noise reduction cavity 7 or the outer noise reduction cavity 6, the position between the outer micro-perforated plate 4 and the inner micro-perforated plate 5 is adjusted until the best noise reduction effect is achieved. Thus, the ratio of the thickness of the outer noise reduction cavity 6 to the thickness of the inner noise reduction cavity 7 can be different, such as 60:140, 30:170, 40:160, etc., so that noise reduction of different noise frequencies can be achieved according to different air supply conditions.

[0039] It should be noted that the total thickness of the first cavity and the second cavity includes, but is not limited to, 200 mm, and can also be other sizes, such as 150 mm, 300 mm, 400 mm, etc., without limitation.

[0040] The noise reduction mechanism also includes multiple partitions 8 evenly spaced along the length of the outer micro-perforated plate 4. The partitions 8 extend vertically until they pass through the inner micro-perforated plate 5. The top of the partitions 8 is fixedly connected to the top inner wall of the outer shell 1. The partitions abut against two corresponding outer micro-perforated plates 4 on both sides along the horizontal direction. In this embodiment, the inner micro-perforated plate 5 is designed not to slip off the partitions 8 during movement. The partitions 8 and the square plate 3 provide support for the outer micro-perforated plate 4 and the inner micro-perforated plate 5 while reducing the propagation speed of axial sound and extending the residence time of noise inside the outer shell 1 to ensure the sound attenuation quality. The multiple partitions 8 divide the outer micro-perforated plate 4 and the inner micro-perforated plate 5 into multiple unit plates, and the multiple unit plates are connected by a connecting mechanism.

[0041] The connecting mechanism includes multiple third electromagnets 30 and multiple fourth electromagnets 31. Connecting grooves are provided on both sides of the partition 8. The two ends of the unit plate are respectively connected to the third electromagnet 30 and the fourth electromagnet 31. The third electromagnet 30 and the fourth electromagnet 31 correspond to each other and attract each other. The third electromagnet 30 or the fourth electromagnet 31 slides and adapts within the connecting groove. In this embodiment, the third electromagnet 30 and the fourth electromagnet 31 can attract each other through the connecting groove, that is, the third electromagnet 30 of the unit plate and the fourth electromagnet 31 of the adjacent unit plate are mutually attracted and connected. However, the end of the unit plate located at both ends facing the outer shell 1 or the partition 8 is not... The third electromagnet 30 or the fourth electromagnet 31 is set up. It needs to be further emphasized that the outer micro-perforated plate 4 or the inner micro-perforated plate 5 can move as a whole through the reasonable distribution of the third electromagnet 30 and the fourth electromagnet 31. The distribution relationship of the third electromagnet 30 and the fourth electromagnet 31 will not be elaborated here. The main purpose here is to explain that the partition 8 will not move during the whole movement. Multiple unit plates move between two adjacent partitions 8 and keep the outer micro-perforated plate 4 or the inner micro-perforated plate 5 moving together. Therefore, the following description will be based on the outer micro-perforated plate 4 or the inner micro-perforated plate 5 as a whole.

[0042] The adjustment mechanism is configured in two sets, located at both ends of the inner micro-perforated plate 5. Each adjustment mechanism includes two guide rails 28 and a slide rod 29. The guide rails 28 are arranged vertically, and the two ends of the slide rod 29 are respectively fitted over the two guide rails 28. One end of each guide rail 28 is connected to the positive and negative terminals of the same external power supply, and the two ends of the same guide rail 28 are connected to the positive and negative terminals of two different external power supplies. The slide rod 29 is connected to the end of the inner micro-perforated plate 5. The guide rails 28 and slide rod 29 are made of conductive material, while the inner micro-perforated plate 5 can be made of insulating material. The four guide rails 28 are located near the four corners of the inner micro-perforated plate 5, and the slide rod 29 is fixedly connected to the end of the inner micro-perforated plate 5.

[0043] When the inner micro-perforated plate 5 needs to move, a power source is turned on, allowing power to flow on the two guide rails 28 and the slide bar 29. The two guide rails 28, the slide bar 29, and the external DC power source form a closed loop. Based on the current flow direction and Ampere's law, the direction of the magnetic field lines on the two guide rails 28 and the slide bar 29 near the energized power source can be obtained. Then, using the left-hand rule, the direction of the Ampere force on the slide bar 29 is parallel to the guide rail 28 and along the length of the detection frame. That is, when the guide rail 28 is energized, the slide bar 29 is subjected to the Ampere force and moves vertically on the guide rail 28, thereby moving the inner micro-perforated plate 5. When the inner micro-perforated plate 5 needs to move in the opposite direction, this power source can be turned off and another power source can be turned on. At this time, the slide bar 29 moves in the opposite direction, thereby controlling the inner micro-perforated plate 5 to move downwards, thus achieving the adjustment effect of the inner noise reduction cavity 7.

[0044] The transmission mechanism includes a lead screw 9, a limiting rod 10, two sliders 11, a power component for controlling the rotation of the lead screw 9, and a sealing component for filling the gap between the top of the square plate 3 and the outer micro-perforated plate 4. The lead screw 9 and the limiting rod 10 are respectively disposed at both ends of the outer micro-perforated plate 4. The lead screw 9 is rotatably connected to the outer shell 1, and the limiting rod 10 is fixedly connected to the outer shell 1. The two sliders 11 are respectively disposed at both ends of the outer micro-perforated plate 4. The sliders 11 are helically engaged with the lead screw 9, and the other slider 11 is sleeved and slides outside the limiting rod 10. In this embodiment, other reciprocating devices such as electric actuators can also be used. Since the movement of the lead screw 9 is more stable, it also supports the multiple unit plates forming the outer micro-perforated plate 4, making the movement of the outer micro-perforated plate 4 more stable. During the rotation of the lead screw 9, the rotation of the outer micro-perforated plate 4 is restricted by the action of the sliders 11 and the limiting rod 10, and the outer micro-perforated plate 4 moves in the vertical direction.

[0045] The power assembly includes a power rod 12, multiple power blades 13, and a control unit for controlling the blade area. The power rod 12 is coaxially fixed to the lead screw 9. The multiple power blades 13 are fixed at equal intervals to the outer peripheral wall of the power rod 12, with the blade plane facing the air supply direction. That is, one end of the blade along its length is fixedly connected to the peripheral wall of the power rod 12, and the blade is vertically arranged. The control unit includes two relatively sliding control plates 14, two racks 15, a gear 16, and a control element. The two racks 15 are respectively slidably arranged on the power blades 13 and are respectively fixedly connected to the two control plates 14. The gear 16 rotates on the power blades 13, and the control plates 14 move along the width direction of the power blades 13. The power blades 13 are also provided with a limiting element 18 to restrict the rotation of the gear 16. The control element is a first impeller 17, with the axis of the first impeller 17 along the air supply direction. The first impeller 17 is coaxially fixed to the gear 16. In order to minimize the noise generated by the blades and the first impeller 17 during rotation, the blades are made of lightweight and high-strength materials. If the wind force is insufficient to make the lead screw 9 rotate quickly, in order to avoid affecting the movement speed of the outer micro-perforated plate 4, the first impeller 17 rotates, driving the gear 16 to rotate. During the rotation of the gear 16, the two racks 15 move in a direction away from each other. At this time, the two control plates 14 can move outward. After the control plates 14 are unfolded, the contact area of ​​the power blades 13 becomes larger, and the rotation speed of the power blades 13 will also increase, making it easier to drive the lead screw 9 to start rotating. In this embodiment of the application, since the wind force requirements of the corresponding site will not change after the setting is completed, the control plates 14 do not need to consider whether they retract.

[0046] The limiting component 18 is set as a second electromagnet, which is located on the inner wall of the outer shell 1. Of course, the first impeller 17 can also be equipped with a second electromagnet to limit the first impeller 17. When it is necessary to adjust the position of the outer micro-perforated plate 4, the limitation of the power rod 12 needs to be released. Since the outer micro-perforated plate 4 does not need to move downward under normal circumstances, but in order to ensure that the outer micro-perforated plate 4 can also move in the vertical direction, the lead screw 9 can be replaced with a bidirectional lead screw 9, thereby realizing the reciprocating motion of the outer micro-perforated plate 4. It should be noted that the inner micro-perforated plate 5 cannot be driven by the lead screw 9 or blades, because the inner micro-perforated plate 5 is located on the inner wall of the outer shell 1, with a far air inlet, and the inner wall structure of the outer shell 1 is limited. Therefore, the inner micro-perforated plate 5 cannot use the transmission direction of the lead screw 9, and can only be driven by electricity.

[0047] When the restriction of the power rod 12 is lifted, the power blade 13 and the power rod 12 are driven by the interaction between the wind and the power blade 13, and the lead screw 9 starts to rotate. With the cooperation of the limiting rod 10, the position of the outer micro-perforated plate 4 is adjusted. At this time, the thickness of the outer noise reduction cavity 6 changes. By observing the data of the noise sensor at the air outlet and comparing the data between the two noise sensors, the staff can obtain the optimal ratio between the outer noise reduction cavity 6 and the inner noise reduction cavity 7. Thus, the optimal ratio between the outer noise reduction cavity 6 and the inner noise reduction cavity 7 under the current air intake condition can be obtained. If further adjustment is needed, the inner noise reduction cavity 7 can be notified to adjust until the noise at the air outlet is reduced to the minimum.

[0048] However, since the outer micro-perforated plate 4 abuts against the top of the square plate 3 in the initial position, a gap will form between the outer micro-perforated plate 4 and the square plate 3 during the upward movement of the outer micro-perforated plate 4. In order not to affect the noise reduction effect, the sealing component includes a sealing plate 19, a first electromagnet 20, and a sealing part for sealing both sides of the outer micro-perforated plate 4. The square plate 3 is provided with a sealing cavity 21, the top of the sealing cavity 21 is open, the sealing plate 19 slides in the sealing cavity 21, the top of the sealing plate 19 is provided with a mounting hole 22, the first electromagnet 20 is installed in the mounting hole 22, and the first electromagnet 20 attracts the outer micro-perforated plate 4. Due to design requirements, the length of the sealing cavity 21 is close to the length of the square plate 3, but there is still a small gap between the end of the square plate 3 and the inner wall of the outer shell 1.

[0049] The sealing part includes an adhesive attachment 23, a shaping component for shaping the adhesive attachment 23, and a winding assembly for winding the adhesive attachment 23. The shaping component is used to adhere the end of the adhesive attachment 23 to the bottom surface of the outer micro-perforated plate 4, corresponding to the side wall of the outer micro-perforated plate 4 and the sealing plate 19. In this embodiment, the adhesive attachment 23 can be made of tape. The winding assembly includes a winding roller 24 and a winding motor 25. The winding roller 24 is rotatably disposed on the inner wall of the square plate 3. The reason for designing the motor here is that the airflow will be reduced on the inner wall of the outer casing 1, which is insufficient to control the rotation of the winding roller 24 by the impeller or the like. Moreover, in this embodiment, since the outer micro-perforated plate 4 needs to reciprocate, the winding roller 24 also needs to reciprocate to wind the adhesive attachment 23.

[0050] The shaping component includes a shaping block 26 and an inflatable airbag 27. The shaping block 26 is fixed at the angle of the outer micro-perforated plate 4, and there are gaps between the shaping block 26, the sealing plate 19, and the side wall of the outer shell 1. The interior of the shaping block 26 is set as a cavity. The inflatable airbag 27 is inflated by an external inflating device. The inflatable airbag 27 adheres the adhesive attachment 23 to the sealing plate 19 and the corresponding side wall of the outer micro-perforated plate 4. In this embodiment, the cavity of the shaping block 26 is open in the direction of the corresponding outer micro-perforated plate 4 and the sealing plate 19. Therefore, the inflatable airbag 27 also faces the direction of the corresponding outer micro-perforated plate 4 and the sealing plate 19 during the inflating process. As the sealing plate 19... When the outer micro-perforated plate 4 moves, the outer micro-perforated plate 4 drives the adhesive attachment 23 to move. At this time, the winding motor 25 also needs to wind or release the adhesive attachment 23 accordingly. In the initial state, the adhesive attachment 23 will only adhere to the end of the outer micro-perforated plate 4 until the noise is adjusted, that is, after the ratio of the outer noise reduction cavity 6 and the inner noise reduction cavity 7 is stable, the expansion airbag 27 will be controlled to expand until the adhesive attachment 23 adheres to the side wall of the corresponding outer micro-perforated plate 4 and the sealing plate 19, thereby sealing the gap between the sealing plate 19 and the outer shell 1, ensuring that the outer noise reduction cavity 6 and the inner noise reduction cavity 7 complete the noise reduction work.

[0051] The implementation principle of a low-noise air supply system in a cleanroom according to an embodiment of this application is as follows: the air supply power module first supplies air into the outer noise reduction cavity 6. The noise passes through the outer noise reduction cavity 6 and the inner micro noise reduction cavity and resonates, thereby achieving the purpose of noise reduction and silencing. In this embodiment, the ratio between the outer noise reduction cavity 6 and the inner noise reduction cavity 7 can be controlled according to the amount of air supplied, i.e. the amount of noise generated. In the initial state of this embodiment, the thickness of the inner noise reduction cavity 7 to the outer noise reduction cavity 6 is 50:150. However, the difference in the actual air intake in different areas results in different noise frequencies, affecting the noise reduction effect of the entire cleanroom air supply system. Therefore, the cavity thickness is set to be adjustable. When it is necessary to fine-tune the thickness of the inner noise reduction cavity 7 or the outer noise reduction cavity 6, the position between the outer micro-perforated plate 4 and the inner micro-perforated plate 5 needs to be adjusted until the best silencing effect is achieved.

[0052] When the inner micro-perforated plate 5 needs to move, a power source is turned on, allowing power to flow on the two guide rails 28 and the slide bar 29. The two guide rails 28, the slide bar 29, and the external DC power source form a closed loop. Based on the current flow direction and Ampere's law, the direction of the magnetic field lines on the two guide rails 28 and the slide bar 29 near the energized power source can be obtained. Then, using the left-hand rule, the direction of the Ampere force on the slide bar 29 is parallel to the guide rail 28 and along the length of the detection frame. That is, when the guide rail 28 is energized, the slide bar 29 is subjected to the Ampere force and moves vertically on the guide rail 28, thereby moving the inner micro-perforated plate 5. When the inner micro-perforated plate 5 needs to move in the opposite direction, this power source can be turned off and another power source can be turned on. At this time, the slide bar 29 moves in the opposite direction, thereby controlling the inner micro-perforated plate 5 to move downwards, thus achieving the adjustment effect of the inner noise reduction cavity 7.

[0053] When it is necessary to adjust the position of the outer micro-perforated plate 4, the restriction of the power rod 12 needs to be released. Since the outer micro-perforated plate 4 does not need to move downward under normal circumstances, but in order to ensure that the outer micro-perforated plate 4 can also move in the vertical direction, the lead screw 9 can be replaced with a bidirectional lead screw 9, thereby realizing the reciprocating motion of the outer micro-perforated plate 4.

[0054] As the sealing plate 19 moves along with the outer micro-perforated plate 4, the outer micro-perforated plate 4 drives the adhesive attachment 23 to move. At this time, the winding motor 25 also needs to wind or release the adhesive attachment 23 accordingly. In the initial state, the adhesive attachment 23 will only adhere to the outer micro-perforated plate 4 at its end. Only after the noise is adjusted, that is, after the ratio of the outer noise reduction cavity 6 and the inner noise reduction cavity 7 is stable, will the expansion airbag 27 be controlled to expand until the adhesive attachment 23 adheres to the side wall of the corresponding outer micro-perforated plate 4 and the sealing plate 19. This can seal the gap between the sealing plate 19 and the corresponding outer micro-perforated plate 4, ensuring that the outer noise reduction cavity 6 and the inner noise reduction cavity 7 complete the noise reduction work.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low noise air supply system for a clean room, characterized by The application relates to a sound-reducing air supply device, which comprises a sound-reducing air supply power module, a sound-reducing module and an air outlet module. The sound-reducing module comprises an outer shell (1), two connecting pipes (2), two noise sensors and a sound-reducing mechanism. The sound-reducing mechanism comprises two square plates (3), four outer micro-perforated plates (4) and four inner micro-perforated plates (5). The four outer micro-perforated plates (4) and the four inner walls of the outer shell (1) surround an outer sound-reducing cavity (6), and the four inner micro-perforated plates (5), the four outer micro-perforated plates (4) and the two square plates (3) surround an inner sound-reducing cavity (7). The sound-reducing mechanism further comprises a plurality of partition plates (8) which are equidistantly distributed along the length direction of the outer micro-perforated plates (4). The two outer micro-perforated plates (4) and the two inner micro-perforated plates (5) move along the vertical direction. The outer micro-perforated plates (4) slide along the vertical direction through a transmission mechanism, and the inner micro-perforated plates (5) slide along the vertical direction of the square plates (3) through an adjusting mechanism. The transmission mechanism comprises a screw rod (9), a limiting rod (10), two sliding blocks (11), a power assembly for controlling the rotation of the screw rod (9) and a sealing assembly for supplementing the gap between the top end of the square plate (3) and the outer micro-perforated plate (4). The screw rod (9) and the limiting rod (10) are arranged at the two ends of the outer micro-perforated plate (4) respectively. The screw rod (9) is rotationally connected with the outer shell (1), and the limiting rod (10) is fixedly connected with the outer shell (1). The two sliding blocks (11) are arranged at the two ends of the outer micro-perforated plate (4) respectively. The sliding block (11) is screw-coupled with the screw rod (9), and the other sliding block (11) is sleeved and slides on the limiting rod (10). The power assembly comprises a power rod (12), a plurality of power blades (13) and a control part for controlling the area of the blades. The power rod (12) is coaxially fixed with the screw rod (9), and the plurality of power blades (13) are equidistantly fixed on the outer circumferential wall of the power rod (12). The blade plane faces the air supply direction. The control part comprises two oppositely sliding control pieces (14), two racks (15), a gear (16) and a control member. The two racks (15) are slidingly arranged on the power blades (13) respectively. The two racks (15) are fixedly connected with the two control pieces (14) respectively. The gear (16) rotates on the power blades (13). The control piece (14) moves along the width direction of the power blades (13). The power blades (13) are further provided with a limiting member (18) for limiting the rotation of the gear (16).

2. The low noise air supply system for clean rooms according to claim 1, characterized in that The control member is a first impeller (17) coaxially fixed with the gear (16) along the air supply direction.

3. The low noise air supply system for clean rooms according to claim 2, characterized in that The closing assembly comprises a closing plate (19), a first electromagnet (20) and a sealing part for sealing both sides of the outer micro-perforated plate (4), the square plate (3) is provided with a closing cavity (21) with an opening at the top end, the closing plate (19) slides in the closing cavity (21), the top end of the closing plate (19) is provided with a mounting hole (22), the first electromagnet (20) is mounted in the mounting hole (22), and the first electromagnet (20) adsorbs the outer micro-perforated plate (4).

4. The low noise air supply system for clean rooms according to claim 3, characterized in that The sealing part comprises an adhesive member (23), a shaping member for shaping the adhesive member (23) and a winding group for winding the adhesive member (23), the shaping member is used for adhering the end of the adhesive member (23) to the bottom surface of the outer micro-perforated plate (4), the side wall of the outer micro-perforated plate (4) and the closing plate (19).

5. The low noise air supply system for clean rooms according to claim 4, characterized in that The shaping member comprises a shaping block (26) and an inflatable air bag (27), the shaping block (26) is fixed at the corner of the outer micro-perforated plate (4), and gaps exist between the shaping block (26) and the closing plate (19) and the side wall of the shell (1), the shaping block (26) is internally provided with a cavity, and the inflatable air bag (27) is externally provided with an inflation device, and the inflatable air bag (27) adheres the adhesive member (23) to the closing plate (19) and the side wall of the outer micro-perforated plate (4).

6. The low noise air supply system for clean rooms according to claim 1, wherein The adjusting mechanism is arranged in two groups and located at two ends of the inner micro-perforated plate (5), the adjusting mechanism comprises two guide rails (28) and a sliding rod (29), the guide rails (28) are arranged along the vertical direction, the sliding rod (29) is sleeved at two ends of the two guide rails (28), one end of the two guide rails (28) is respectively connected to the positive and negative poles of the same external power supply, and the two ends of the same guide rail (28) are respectively connected to the positive and negative poles of two different external power supplies, and the sliding rod (29) is connected to the end of the inner micro-perforated plate (5).

7. The low noise air supply system for clean rooms according to claim 2, wherein The connecting mechanism comprises a plurality of third electromagnets (30) and a plurality of fourth electromagnets (31), both sides of the partition plate (8) are provided with connecting grooves, the two ends of the unit plate are respectively connected to the third electromagnets (30) and the fourth electromagnets (31), the third electromagnets (30) and the fourth electromagnets (31) are corresponding and adsorbed to each other, and the third electromagnets (30) or the fourth electromagnets (31) are adapted to slide in the connecting grooves.

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