Air exhaust box for clean room

Abstract

The utility model relates to an exhaust box for a clean room, which comprises a shell, the bottom of the shell is connected with a first air inlet through a trapezoidal frame, a first filter frame is inserted into the first air inlet, an air pump is mounted at the top of the shell, an air outlet is mounted on the air pump, rotating shafts are arranged on the inner wall of the shell in a bilateral symmetry manner, and an upper baffle is mounted on the rotating shaft on the left side. Second filter frames are arranged at the tops of the upper baffle and the lower baffle, and second air inlets are formed in the left side and the right side of the shell in a penetrating mode. The relative position of the second filter frame and the second air inlet can be adjusted through rotation of the upper baffle and the lower baffle, so that the air inlet area is flexibly controlled, the filter mode can be flexibly adjusted according to the actual operation requirement of the clean room through the design, and the device adapts to pollutant types and concentration differences in different process stages; the stability of the filtering effect is ensured, repeated circulating purification caused by insufficient filtering capacity is avoided, and the energy consumption and the operation cost are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust and purification technology, specifically relating to an exhaust box for cleanrooms. Background Technology

[0002] In cleanroom environments, the exhaust system is a key device for maintaining air cleanliness and controlling pollutant emissions. Its main core component is the exhaust box, which is mainly used to efficiently filter indoor polluted air and discharge it to ensure that the cleanroom meets the particulate matter concentration requirements of ISO standards (such as ISO 14644).

[0003] Traditional exhaust boxes typically use a fixed filtration structure (such as a single-layer HEPA / ULPA filter or activated carbon adsorption layer), which has limited filtration efficiency and airflow regulation capabilities. When the cleanroom operation requirements change, such as differences in the types and concentrations of pollutants in different process stages, the exhaust box cannot flexibly adjust the filtration mode, resulting in unstable filtration effects. Furthermore, when some pollutants penetrate the filter, multiple cycles of purification are required, inevitably increasing energy consumption and operating costs. Utility Model Content

[0004] The purpose of this invention is to provide an exhaust box for cleanrooms to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cleanroom exhaust box, comprising an outer shell, a first air inlet connected to the bottom of the outer shell via a trapezoidal frame, a first filter frame inserted into the first air inlet, an air pump installed on the top of the outer shell, an air outlet installed on the air pump, symmetrically arranged rotating shafts on the left and right sides of the inner wall of the outer shell, an upper baffle installed on the left rotating shaft, a lower baffle installed on the right rotating shaft, a second filter frame provided on the top of both the upper and lower baffles, and a second air inlet extending through the left and right sides of the outer shell.

[0006] Preferably, the upper baffle and the lower baffle are provided with a fixing block on the outer bottom of the bottom, and the inner wall of the trapezoidal frame is provided with a rotating block at the position below the fixing block on the rear side. The rotating block is provided with a first shaft on the inner bottom side and a second shaft on the outer bottom side. The bottom of the inner rear side of the trapezoidal frame is provided with a swing block.

[0007] Preferably, each end of the pendulum block is connected to a first pendulum rod between the first axis and the two ends of the pendulum block, and each of the fixed blocks is connected to a second pendulum rod between the two adjacent second axes.

[0008] Preferably, a driving component is rotatably provided on the rear side of the inner wall of the trapezoidal frame, and the driving rod of the driving component is connected to the lower end of the swing block.

[0009] Preferably, a positioning plate is provided on the rear side of both the upper and lower baffles, and a positioning block is provided on the rear side of the inner wall of the outer shell.

[0010] Compared with the prior art, the beneficial effects of this utility model are: the trapezoidal frame design in this utility model can uniformly guide the airflow for filtration, improve the filtration effect, reduce turbulence and pressure loss, and extend the service life of the first filter frame.

[0011] In this invention, the relative position of the second filter frame and the second air inlet can be adjusted by rotating the upper and lower baffles, thereby flexibly controlling the air inlet area. This design can flexibly adjust the filtration mode according to the actual operating needs of the cleanroom, adapt to the differences in the types and concentrations of pollutants in different process stages, ensure the stability of the filtration effect, avoid multiple cycles of purification due to insufficient filtration capacity, and reduce energy consumption and operating costs.

[0012] The exhaust box in this invention adopts a multi-layer filtration structure of a first filter frame and a second filter frame, which can effectively filter pollutants of different particle sizes in the air, improve filtration efficiency, and ensure that the cleanroom meets the particulate matter concentration requirements of ISO standards (such as ISO 14644). Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a partial exploded view of the present invention;

[0015] Figure 3 This is a cross-sectional view of the present invention;

[0016] Figure 4 This is a partial three-dimensional structural diagram of the present invention.

[0017] The following components are labeled in the diagram: 1. Outer shell; 2. Trapezoidal frame; 3. First air inlet; 4. First filter frame; 5. Air pump; 6. Air outlet; 7. Rotating shaft; 8. Upper baffle; 9. Lower baffle; 10. Second filter frame; 11. Second air inlet; 12. Fixing block; 13. Rotating block; 14. First shaft; 15. Second shaft; 16. Swing block; 17. First swing rod; 18. Second swing rod; 19. Driving component; 20. Positioning plate; 21. Positioning block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] like Figures 1 to 4 The exhaust box for a cleanroom shown includes an outer shell 1. A first air inlet 3 is connected to the bottom of the outer shell 1 via a trapezoidal frame 2. A first filter frame 4 is inserted into the first air inlet 3. A blower 5 is installed on the top of the outer shell 1, and an air outlet 6 is installed on the blower 5. Rotating shafts 7 are symmetrically arranged on the left and right sides of the inner wall of the outer shell 1. An upper baffle 8 is installed on the left rotating shaft 7, and a lower baffle 9 is installed on the right rotating shaft 7. A second filter frame 10 is provided at the top of both the upper and lower baffles 8 and 9. Second air inlets 11 are provided through the left and right sides of the outer shell 1. Fixing blocks 12 are provided on the outer sides of the bottom of both the upper and lower baffles 8 and 9. A second filter frame 10 is provided on the rear side of the inner wall of the trapezoidal frame 2. A rotating block 13 is provided at the lower part of the fixed block 12. A first shaft 14 is provided on the inner side of the bottom of the rotating block 13, and a second shaft 15 is provided on the outer side of the bottom of the rotating block 13. A swing block 16 is rotatably provided at the bottom of the rear side of the trapezoidal frame 2. A first swing rod 17 is connected to the first shaft 14 at both ends of the swing block 16. A second swing rod 18 is connected to the adjacent second shaft 15 of each fixed block 12. A driving member 19 is rotatably provided on the rear side of the inner wall of the trapezoidal frame 2. The driving rod of the driving member 19 is connected to the lower end of the swing block 16. A positioning plate 20 is provided on the rear side of the upper baffle 8 and the lower baffle 9. A positioning block 21 is provided on the rear side of the inner wall of the outer shell 1.

[0021] In this invention, the trapezoidal frame 2 is designed to uniformly guide airflow for filtration, improving the filtration effect while reducing turbulence and pressure loss, and extending the service life of the first filter frame 4. The relative position of the second filter frame 10 and the second air inlet 11 can be adjusted by rotating the upper baffle 8 and the lower baffle 9, thereby flexibly controlling the air inlet area. This design allows for flexible adjustment of the filtration mode according to the actual operating needs of the cleanroom, adapting to the differences in pollutant types and concentrations at different process stages, ensuring the stability of the filtration effect, avoiding multiple cycles of purification due to insufficient filtration capacity, and reducing energy consumption and operating costs. The exhaust box in this invention adopts a multi-layer filtration structure of the first filter frame 4 and the second filter frame 10, which can effectively filter pollutants of different particle sizes in the air, improving filtration efficiency and ensuring that the cleanroom meets the particulate matter concentration requirements of ISO standards (such as ISO 14644).

[0022] Example 2

[0023] like Figures 1 to 4The exhaust box for a cleanroom shown includes an outer shell 1, which is a hollow rectangular frame. Second air inlets 11, also rectangular frames, are provided through the left and right sides of the outer shell 1. A trapezoidal frame 2 is provided through the bottom of the outer shell 1, and a first air inlet 3 is connected to the bottom of the trapezoidal frame 2. A first filter frame 4 is inserted into the first air inlet 3. The trapezoidal frame 2 is wider at the top and narrower at the bottom. Compared to a conventional rectangular frame, the trapezoidal structure guides airflow more evenly through the first filter frame 4. The top cross-section of the trapezoidal frame 2 is consistent with that of the outer shell 1, allowing for easy docking and reducing turbulence and pressure loss caused by abrupt changes in cross-section. Furthermore, the gradually expanding trapezoidal structure allows for a more uniform distribution of the filtration load, reducing localized blockages or excessive wear caused by uneven airflow, improving the utilization rate of the first filter frame 4, and extending its service life. Correspondingly, a blower 5 is installed on the top of the outer shell 1. An air outlet 6 is installed on the blower 5 above the outer shell 1. When the blower 5 is running, it can drive air to enter through the first air inlet 3, and then filter and purify it through the first filter frame 4. The purified air enters the outer shell 1 upward and is discharged through the air outlet 6 of the blower 5. This process is repeated continuously to achieve the exhaust setting of the clean room.

[0024] The inner wall of the outer casing 1 is symmetrically provided with rotating shafts 7. An upper baffle 8 is installed on the left rotating shaft 7, and a lower baffle 9 is installed on the right rotating shaft 7. The upper baffle 8 is located above the lower baffle 9, and the top of the two together forms a straight line. At the same time, a second filter frame 10 is provided on the top of both the upper baffle 8 and the lower baffle 9. The second filter frame 10 forms a 45° angle with the upper baffle 8 and the lower baffle 9, and the second filter frame 10 can fit against the second air inlet 11 after rotating 45°, that is, it is perpendicular to the second air inlet 11.

[0025] The rotation of the second filter frame 10 can be driven by the upper baffle 8 and the lower baffle 9, specifically:

[0026] Both the upper baffle 8 and the lower baffle 9 have fixing blocks 12 on their outer bottom sides. The inner rear side of the trapezoidal frame 2 has rotating blocks 13 located below the fixing blocks 12. The inner bottom side of each rotating block 13 has a first shaft 14, and the outer bottom side of each rotating block 13 has a second shaft 15. A swing block 16 is rotatably mounted on the bottom of the inner rear side of the trapezoidal frame 2. Both ends of the swing block 16 are rotatably connected to the first shaft 14 with first swing rods 17. Each fixing block 12 is rotatably connected to an adjacent second shaft 15 with a second swing rod 18. A driving component 19 is rotatably mounted on the inner rear side of the trapezoidal frame 2. The drive rod is connected to the lower end of the swing block 16 and is kept stable by the connecting restraint force of the swing block 16. That is, the operation of the drive component 19 causes the drive rod to extend, which in turn causes the swing block 16 to swing. The lower part of the swing block 16 swings to the left, which drives the rotating block 13 to rotate through the first swing rod 17. The rotating block 13 rotates outward, which drives the fixed block 12 and the lower baffle 9 to rotate upward through the second swing rod 18. At the same time, the upper part of the swing block 16 swings to the right, which also drives the fixed block 12 and the upper baffle 8 to rotate upward and open. In this way, the upper baffle 8 and the lower baffle 9 can be opened at the same time to cooperate with the exhaust work of the clean room.

[0027] Understandably, initially, the upper baffle 8 and lower baffle 9 remain horizontally joined at the bottom of the housing 1. When the purification demand is low, the drive unit 19 is activated to rotate the upper baffle 8 and lower baffle 9. When the upper baffle 8 and lower baffle 9 rotate to contact the top of the housing 1, the included angle must be greater than 45°. That is, at this time, the second filter frame 10 is located in the second air inlet 11 in an inclined state. After the upper baffle 8 and lower baffle 9 contact the top of the housing 1, they block the second air inlet 11. Therefore, after the air pump 5 is started, it can only introduce air for purification through the first air inlet 3, maintaining an appropriate purification effect.

[0028] When there is a large purification demand in the cleanroom, the drive unit 19 can be activated to rotate the upper baffle 8 and the lower baffle 9 by 45° based on the initial state in which the upper baffle 8 and the lower baffle 9 are kept in a horizontal state at the bottom of the outer shell 1. This causes the second filter frame 10 to fit against the inner edge of the second air inlet 11. At this time, the upper baffle 8 and the lower baffle 9 are open, and the first air inlet 3 and the second air inlet 11 are both open. After the air pump 5 is started, the surrounding air can be introduced into the purification through the first air inlet 3 and the second air inlet 11 to achieve a strong purification effect.

[0029] Furthermore, both the upper baffle 8 and the lower baffle 9 are provided with positioning plates 20 on their rear sides, and the inner wall of the outer shell 1 is provided with positioning blocks 21. When the baffles and the lower baffle 9 are kept in a horizontal state at the bottom of the outer shell 1, the upper baffle 8 and the lower baffle 9 can be fully limited by the positioning plates 20 being locked in place by the positioning blocks 21, thus avoiding excessive rotation of the baffles.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A cleanroom exhaust box, comprising an outer shell, a first air inlet connected to the bottom of the outer shell via a trapezoidal frame, a first filter frame inserted into the first air inlet, an air pump mounted on the top of the outer shell, and an air outlet mounted on the air pump, characterized in that... The inner wall of the outer casing is symmetrically provided with rotating shafts on the left and right sides. An upper baffle is installed on the rotating shaft on the left side and a lower baffle is installed on the rotating shaft on the right side. A second filter frame is provided on the top of both the upper and lower baffles. A second air inlet is provided through the left and right sides of the outer casing.

2. The exhaust fan box for a cleanroom according to claim 1, characterized in that, The upper baffle and the lower baffle are both provided with fixed blocks on their bottom outer sides. The inner wall of the trapezoidal frame is provided with rotating blocks located below the fixed blocks on its rear side. The rotating blocks are provided with a first shaft on their bottom inner side and a second shaft on their bottom outer side. The bottom of the inner rear side of the trapezoidal frame is provided with a swing block that rotates.

3. The exhaust fan box for a cleanroom according to claim 2, characterized in that, Each of the two ends of the pendulum block is connected to a first pendulum rod between the first axis and the first axis, and each of the fixed blocks is connected to a second pendulum rod between the adjacent second axis.

4. The exhaust fan box for a cleanroom according to claim 2, characterized in that, A driving component is rotatably provided on the rear side of the inner wall of the trapezoidal frame, and the driving rod of the driving component is connected to the lower end of the swing block.

5. The exhaust fan box for a cleanroom according to claim 1, characterized in that, The upper baffle and the lower baffle are both provided with positioning plates on their rear sides, and the inner wall of the outer shell is provided with positioning blocks on its rear side.

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