Ventilation cooling equipment for dust-free workshop

Abstract

The utility model relates to the technical field of ventilation cooling equipment, in particular to ventilation cooling equipment for a dust-free workshop, which comprises an air inlet pipeline, a filter assembly and a cleaning assembly, one end of the air inlet pipeline is provided with an air inlet, the other end of the air inlet pipeline is provided with a ventilation opening, and the filter assembly comprises a metal filter screen and an electrostatic adsorption filter screen. The metal filter screen and the electrostatic adsorption filter screen are both located in the air inlet pipeline, and the metal filter screen is located on the side close to the air inlet. After external air is filtered through the metal filter screen, the electrostatic adsorption filter screen, the nanofiber folding filter element and the carbon nanotube honeycomb filter element, large-particle to nanoscale impurities can be efficiently removed, and the air purification effect is improved. The cleaning assembly is designed for the air inlet side of the filter element, a scraper drives scrapers of different flexibility to rotate, the air inlet side of the filter element is cleaned in a targeted mode, the cleaning effect is improved, the filter element is prevented from being damaged, the service life of the filter element is prolonged, and efficient operation of the filtering assembly is guaranteed.

Description

Technical Field

[0001] This utility model relates to a ventilation and cooling device, and more particularly to a ventilation and cooling device for cleanrooms, belonging to the technical field of ventilation and cooling devices. Background Technology

[0002] In modern industrial production, many cleanrooms have extremely high requirements for air quality, as even tiny dust particles can have a serious impact on the production process and product quality. Take electronic chip manufacturing workshops as an example: chip manufacturing processes are incredibly precise, and their internal circuits are extremely delicate. If dust accidentally falls in, it can easily cause a short circuit in the chip, rendering the entire chip unusable and severely impacting production efficiency and product yield. Furthermore, dust particles can interfere with the transmission of electronic signals within the chip, causing various subtle performance problems and posing a threat to the long-term stability of the product.

[0003] However, current ventilation and cooling equipment for cleanrooms generally lacks efficient and comprehensive air purification capabilities when drawing air from the outside, making it difficult to purify the air to the ideal state that meets the stringent standards of cleanrooms. Most equipment only focuses on cooling the air, merely addressing the single need for temperature regulation, while neglecting the more critical air purification process. This allows a large amount of insufficiently purified air to enter the cleanroom, posing a significant risk to production activities and severely restricting product quality improvement and production process stability.

[0004] Therefore, there is an urgent need to improve a ventilation and cooling device for cleanrooms to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a ventilation and cooling device for cleanrooms. External air undergoes multi-stage filtration through a metal filter, an electrostatic adsorption filter, a nanofiber pleated filter, and a carbon nanotube honeycomb filter. This effectively removes various impurities from large particles to nanoscale particles, ensuring that the air entering the cleanroom meets extremely high cleanliness standards and satisfies the stringent air quality requirements of cleanrooms. The cleaning component is designed specifically for the air inlet side of the filter. A scraper drives flexible scrapers of varying flexibility to rotate, allowing for targeted cleaning of the air inlet side of the filter. This improves cleaning efficiency while avoiding damage to the filter due to improper flexibility, thus extending the filter's lifespan and ensuring the filter components continuously and stably perform their high-efficiency filtration performance.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A ventilation and cooling device for a cleanroom includes an air inlet duct, a filter assembly, and a cleaning assembly. One end of the air inlet duct is designated as an air inlet, and the other end is designated as a vent. The filter assembly includes a metal filter and an electrostatic adsorption filter, both of which are located inside the air inlet duct. The metal filter is located on the side closer to the air inlet, and the electrostatic adsorption filter is located on the side of the metal filter away from the air inlet. A nanofiber pleated filter element is provided on the other side of the electrostatic adsorption filter element, and a carbon nanotube honeycomb filter element is provided on the side of the nanofiber pleated filter element away from the electrostatic adsorption filter element.

[0008] The cleaning assembly includes multiple fixing rings, a fixing plate fixedly connected to the fixing rings, and a scraper rotatably connected to the fixing plate. The multiple fixing rings are all located on the same side of multiple filter elements. A rotating shaft is rotatably connected inside the fixing plate. The rotating shaft is fixedly connected to the scraper. A flexible scraper is fixedly connected to one side of the scraper. The flexible scraper corresponds to the filter assembly.

[0009] Preferably, a rotating rod is provided on one side of the air inlet duct, and a multi-layer rotating bracket is rotatably connected to the outer wall of the rotating rod. The rotating bracket is slidably connected to the air inlet duct, and the multi-layer rotating bracket corresponds to multiple different filter elements.

[0010] Preferably, a pulley is fixedly connected to the outside of one end of the rotating rod near the vent, a transmission belt is rotatably connected to the outer wall of the pulley, a second pulley is rotatably connected to the other end of the transmission belt, a drive motor is provided on one side of the second pulley, and the output end of the drive motor is connected to the second pulley.

[0011] Preferably, a limiting groove is formed on the outer wall of the rotating rod, the limiting groove penetrates multiple layers of the rotating bracket, a sliding block is slidably connected inside the rotating rod, a limiting plate is rotatably connected to the outer wall of the sliding block, the limiting plate corresponds to the limiting groove, one end of the rotating rod is provided with an electric telescopic rod, and the output end of the electric telescopic rod is connected to one side of the sliding block.

[0012] Preferably, each of the multiple filter elements is provided with a pressure sensor one on one side near the air inlet, and a pressure sensor two corresponding to the pressure sensor one is provided on the other side of the multiple filter elements.

[0013] Preferably, a plurality of return springs are provided between the limiting plate and the sliding block, and the two ends of the return springs are respectively connected to the limiting plate and the sliding block.

[0014] Preferably, a pulley three is fixedly connected to the outer wall of one end of the rotating shaft, a transmission belt two is rotatably connected to the outer wall of the pulley three, a pulley four is rotatably connected to the other end of the transmission belt two, a drive shaft is fixedly connected to multiple pulley fours, a drive motor two is provided on one side of the drive shaft, and the output end of the drive motor two is connected to the drive shaft.

[0015] Preferably, each of the fixing rings is provided with a fixing air pipe on the side near the vent, and the inner wall of the fixing air pipe is fixedly connected with multiple nozzles.

[0016] This utility model has at least the following beneficial effects:

[0017] 1. External air undergoes multi-stage filtration through metal filters, electrostatic adsorption filters, nanofiber pleated filters, and carbon nanotube honeycomb filters. This effectively removes various impurities from large particles to nanoscale particles, ensuring that the air entering the cleanroom meets extremely high cleanliness standards and the strict requirements for air quality in cleanrooms. The cleaning components are designed specifically for the air inlet side of the filter element. By using a scraper to drive flexible scrapers of varying flexibility, the air inlet side of the filter element can be cleaned in a targeted manner. This improves the cleaning effect while avoiding damage to the filter element due to improper flexibility, thus helping to extend the service life of the filter element and ensuring that the filtration components continuously and stably perform high-efficiency filtration.

[0018] 2. The nozzle is located at the air outlet end of the filter element. High-pressure gas passes through from the air outlet side of the filter element to the air inlet side, which can penetrate deep into the interior of the filter element and effectively blow off the dust that is hard to reach on the surface of the air inlet side of the filter element and in the internal pores. This achieves a more comprehensive cleaning of the air inlet side of the filter element. Compared with cleaning only the surface, it can remove impurities more thoroughly and improve the cleaning effect. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 Three-dimensional illustration provided for this utility model Figure 1 ;

[0021] Figure 2 Provided by this utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle;

[0022] Figure 3 Three-dimensional illustration provided for this utility model Figure 2 ;

[0023] Figure 4 Provided by this utility model Figure 3A magnified schematic diagram of the structure at point B in the middle;

[0024] Figure 5 Three-dimensional illustration provided for this utility model Figure 3 ;

[0025] Figure 6 Provided by this utility model Figure 5 A magnified schematic diagram of the structure at point C;

[0026] Figure 7 A cross-sectional schematic diagram provided for this utility model;

[0027] Figure 8 This is a magnified structural diagram of some of the components provided by this utility model.

[0028] In the diagram: 1. Air inlet duct; 2. Filter assembly; 3. Cleaning assembly; 4. Air inlet; 5. Ventilation outlet; 6. Metal filter screen; 7. Electrostatic adsorption filter screen; 8. Nanofiber pleated filter element; 9. Carbon nanotube honeycomb filter element; 10. Fixing ring; 11. Fixing plate; 12. Scraper; 13. Rotating shaft; 14. Flexible scraper; 21. Rotating rod; 22. Rotating bracket; 31. Pulley 1; 32. Transmission belt 1; 33. Pulley 2; 34. Drive motor 1; 41. Limiting groove; 42. Sliding block; 43. Limiting plate; 44. Electric telescopic rod; 51. Pressure sensor 1; 52. Pressure sensor 2; 61. Return spring; 71. Pulley 3; 72. Transmission belt 2; 73. Pulley 4; 74. Drive shaft; 75. Drive motor 2; 81. Fixed air pipe; 82. Nozzle. Detailed Implementation

[0029] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0030] like Figures 1-8As shown in the figure, this embodiment provides a ventilation and cooling device for a cleanroom, including an air inlet duct 1, a filter assembly 2, and a cleaning assembly 3. One end of the air inlet duct 1 is designated as an air inlet 4, and the other end is designated as a vent 5. The air inlet duct 1 serves as a channel for air circulation, guiding outside air into the air inlet 4 and then filtering it through the internal filter assembly 2. The filter assembly 2 includes a metal filter screen 6 and an electrostatic adsorption filter screen 7, both located inside the air inlet duct 1. The metal filter screen 6 is located on the side closer to the air inlet 4, performing preliminary filtration of the air entering the air inlet duct 1 and intercepting larger particles. The electrostatic adsorption filter screen 7 is located on the side of the metal filter screen 6 away from the air inlet 4, utilizing the principle of electrostatic adsorption. Smaller particles that the metal filter 6 fails to intercept are captured, further improving air cleanliness. On the other side of the electrostatic adsorption filter 7, there is a nanofiber pleated filter element 8. The nanofiber pleated filter element 8 filters the air again after it has been filtered by the electrostatic adsorption filter 7. The pleated structure of the nanofiber pleated filter element 8 increases the filtration area and improves the filtration efficiency, further removing fine impurities in the air and making the air cleaner. On the side of the nanofiber pleated filter element 8 away from the electrostatic adsorption filter 7, there is a carbon nanotube honeycomb filter element 9. The carbon nanotube honeycomb filter element 9 serves as the last line of defense in the entire filtration process, performing deep filtration of the air. It is mainly used to adsorb nano-level particles, ensuring that the air after the previous filtrations reaches an extremely high cleanliness standard and meets the strict requirements of cleanrooms for air quality.

[0031] The cleaning component 3 includes multiple fixing rings 10, fixing plates 11 fixedly connected to the fixing rings 10, and scrapers 12 rotatably connected to the fixing plates 11. There are four sets of fixing rings 10. The fixing plates 11 are fixed to one side of the fixing rings 10. The scrapers 12 are located inside the fixing rings 10 and can rotate freely. The multiple fixing rings 10 are all located on the same side of multiple filter elements. The four fixing plates 11 are located on the side of four different filter elements near the air inlet 4, which facilitates the cleaning of the air inlet side of the filter elements later. The fixing plates 11 are rotatably connected to a rotating shaft 13. The rotating shaft 13 is fixedly connected to the scraper 12 and drives the scraper 12 to rotate. A flexible scraper 14 is fixedly connected to one side of the scraper 12. The flexible scraper 14 corresponds to the filter component 2. The flexible scrapers 14 in the four fixing rings 10 have different flexibility. The flexibility of the flexible scraper 14 is set differently according to the different filter elements it corresponds to, which improves the cleaning effect while avoiding damage to the filter elements.

[0032] Among them, such as Figures 1-8As shown, a rotating rod 21 is provided on one side of the air inlet duct 1. A multi-layer rotating bracket 22 is rotatably connected to the outer wall of the rotating rod 21. The rotating rod 21 is the core driving component of the rotating structure. The rotating rod 21 provides the central axis of rotation for the multi-layer rotating bracket 22, so that the multi-layer rotating bracket 22 connected to it can rotate around it. There are four multi-layer rotating brackets 22. The rotating brackets 22 are slidably connected to the air inlet duct 1. The rotating brackets 22 can slide into the air inlet duct 1 and slide out of the air inlet duct 1. The multi-layer rotating brackets 22 correspond to multiple different filter elements. The multiple different filter elements are fixed inside the multi-layer rotating brackets 22. The rotating brackets 22 drive the filter elements to move, which is convenient for replacing and cleaning the filter elements.

[0033] Furthermore, such as Figures 1-8 As shown, a pulley 31 is fixedly connected to the outside of the rotating rod 21 near the vent 5. A transmission belt 32 is rotatably connected to the outer wall of the pulley 31. A pulley 33 is rotatably connected to the other end of the transmission belt 32. A drive motor 34 is provided on one side of the pulley 33. The output end of the drive motor 34 is connected to the pulley 33. The drive motor 34 provides rotational power to the pulley 33. The pulley 33 transmits the rotational motion to the pulley 31 through the cooperation of the transmission belt 32. The pulley 33 then drives the rotating rod 21 to rotate, and the rotating rod 21 drives the rotating bracket 22 to rotate.

[0034] Furthermore, such as Figures 1-8 As shown, a limiting groove 41 is provided on the outer wall of the rotating rod 21. The limiting groove 41 passes through the multi-layer rotating bracket 22. A sliding block 42 is slidably connected inside the rotating rod 21. A limiting plate 43 is rotatably connected to the outer wall of the sliding block 42. The limiting plate 43 corresponds to the limiting groove 41. The sliding block 42 slides inside the rotating rod 21, causing the limiting plate 43 to move. The limiting plate 43 slides in the limiting groove 41. When the limiting plate 43 slides into one of the rotating brackets 22, the rotation of the rotating rod 21 causes the limiting plate 43 to rotate. Under the mutual abutment between the limiting plate 43 and the rotating bracket 22, the limiting plate 43 can drive the rotating bracket 22 to rotate, thereby achieving the purpose of rotating a single filter element out of the ventilation pipe. One end of the rotating rod 21 is provided with an electric telescopic rod 44. The output end of the electric telescopic rod 44 is connected to one side of the sliding block 42. The electric telescopic rod 44 facilitates the sliding block 42 to slide to a designated position inside the rotating rod 21.

[0035] Among them, such as Figures 1-8As shown, multiple filter elements are equipped with pressure sensors 51 on one side near the air inlet 4, and pressure sensors 52 corresponding to pressure sensors 51 on the other side. Pressure sensors 51 can measure the pressure of the air entering the filter element in real time, helping to understand the initial pressure state of the air entering the filter element in the air inlet duct 1. Pressure sensors 52 are located on the other side of the filter element, corresponding to pressure sensors 51, and are responsible for measuring the pressure of the air after it has been filtered by the filter element. Combined with the data from pressure sensors 51, the pressure difference before and after the filter element is calculated. When the filter element gradually becomes clogged, the resistance of air passing through the filter element increases, and the pressure difference will increase accordingly. By setting a reasonable pressure difference threshold, and comparing the measured pressure difference with the threshold, it is possible to accurately determine whether the filter element needs to be cleaned or replaced.

[0036] Among them, such as Figures 1-8 As shown, multiple return springs 61 are provided between the limiting plate 43 and the sliding block 42. The two ends of the return springs 61 are connected to the limiting plate 43 and the sliding block 42 respectively. When the filter element needs to be slid out of the air inlet pipe, the rotating rod 21 drives the limiting plate 43 to rotate, compressing the return springs 61. At the same time, the sliding block 42 remains stationary, and the rotating bracket 22 rotates around the rotating rod 21 as the axis. When the filter element needs to be slid into the air inlet pipe, the rotating rod 21 drives the limiting plate 43 to rotate and rotates the rotating bracket 22 into the air inlet pipe, and the return springs 61 are reset.

[0037] Among them, such as Figures 1-8 As shown, a pulley 3 71 is fixedly connected to the outer wall of one end of the rotating shaft 13. A transmission belt 2 72 is rotatably connected to the outer wall of the pulley 3 71. A pulley 4 73 is rotatably connected to the other end of the transmission belt 2 72. Multiple pulleys 4 73 are fixedly connected to a drive shaft 74. A drive motor 2 75 is provided on one side of the drive shaft 74. The output end of the drive motor 2 75 is connected to the drive shaft 74. The drive motor 2 75 drives the drive shaft 74 to rotate. The drive shaft 74 drives multiple pulleys 4 73 and multiple transmission belts 2 72 to rotate. Under the drive of multiple transmission belts 2 72, the pulley 3 71 rotates. The pulley 3 71 drives the rotating shaft 13 to rotate, thereby driving the scraper 12 to rotate.

[0038] Among them, such as Figures 1-8As shown, each fixing ring 10 is provided with a fixing air pipe 81 on the side near the vent 5. There are four fixing air pipes 81. Multiple nozzles 82 are fixedly connected to the inner wall of the fixing air pipe 81. The fixing air pipe 81 is responsible for delivering the gas provided by the external air source to each nozzle 82. Multiple nozzles 82 are fixedly connected to the inner wall of the fixing air pipe 81, and the gas delivered by the fixing air pipe 81 is sprayed out at a specific angle and pressure. The nozzles 82 are located at the air outlet end of the filter element, so that the high-pressure gas sprayed out of the nozzles 82 can pass through one side of the filter element. The nozzles 82 are located at the air outlet end of the filter element, so that the high-pressure gas sprayed out of the nozzles 82 can be blown from the air outlet side of the filter element to the air inlet side, thereby blowing off the dust attached to the air inlet side of the filter element.

[0039] like Figures 1-8 As shown, the principle of the ventilation and cooling equipment for a cleanroom provided in this embodiment is as follows: Outside air enters through the air inlet 4 of the air inlet duct 1, passes sequentially through the metal filter 6, the electrostatic adsorption filter 7, the nanofiber pleated filter 8, and finally through the carbon nanotube honeycomb filter 9 into the subsequent cooling area. Pressure sensors 51 and 52 work in real time to detect the inlet and outlet pressure values ​​of each filter. When the pressure difference exceeds the reasonable pressure difference threshold, it is determined that the filter needs cleaning or replacement. The electric telescopic rod 44 is activated, pushing the sliding block 42 to move the limiting plate 43 within the limiting groove 41 into the rotating bracket 22 connected to the corresponding filter. The drive motor 34 starts, driving the pulley 33 to rotate. Drive belt 32 drives pulley 31 to rotate, which in turn drives rotating rod 21 to rotate. Rotating rod 21 drives rotating bracket 22 to rotate. Drive motor 75 starts, driving drive shaft 74 to rotate. Drive shaft 74 drives multiple pulleys 73 to rotate, which in turn drives pulley 71 to rotate via drive belt 72. This causes rotating shaft 13 to rotate, and scraper 12, which is fixedly connected to rotating shaft 13, rotates accordingly. Scraper 12 drives flexible scraper 14 to rotate and clean one side of the filter element. At the same time, air is introduced into the corresponding fixed air pipe 81, and high-pressure gas is sprayed onto one side of the filter element using multiple nozzles 82. This works in conjunction with the scraping action of flexible scraper 14 to complete the cleaning of the filter element.

[0040] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0041] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0042] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A ventilation and cooling device for a cleanroom, comprising an air inlet duct (1), a filter assembly (2), and a cleaning assembly (3), characterized in that: One end of the air inlet duct (1) is set as an air inlet (4), and the other end of the air inlet duct (1) is set as a ventilation outlet (5). The filter assembly (2) includes a metal filter screen (6) and an electrostatic adsorption filter screen (7). The metal filter screen (6) and the electrostatic adsorption filter screen (7) are both located inside the air inlet duct (1). The metal filter screen (6) is located on the side close to the air inlet (4), and the electrostatic adsorption filter screen (7) is located on the side of the metal filter screen (6) away from the air inlet (4). A nanofiber pleated filter element (8) is provided on the other side of the electrostatic adsorption filter screen (7), and a carbon nanotube honeycomb filter element (9) is provided on the side of the nanofiber pleated filter element (8) away from the electrostatic adsorption filter screen (7). The cleaning component (3) includes multiple fixing rings (10), a fixing plate (11) fixedly connected to the fixing rings (10), and a scraper (12) rotatably connected to the fixing plate (11). The multiple fixing rings (10) are all located on the same side of the multiple filter elements. A rotating shaft (13) is rotatably connected inside the fixing plate (11). The rotating shaft (13) is fixedly connected to the scraper (12). A flexible scraper (14) is fixedly connected to one side of the scraper (12). The flexible scraper (14) corresponds to the filter component (2).

2. The ventilation and cooling equipment for a cleanroom according to claim 1, characterized in that: A rotating rod (21) is provided on one side of the air inlet duct (1). A multi-layer rotating bracket (22) is rotatably connected to the outer wall of the rotating rod (21). The rotating bracket (22) is slidably connected to the air inlet duct (1). The multi-layer rotating bracket (22) corresponds to multiple different filter elements.

3. The ventilation and cooling equipment for a cleanroom according to claim 2, characterized in that: The rotating rod (21) is fixedly connected to a pulley (31) at one end near the vent (5). A transmission belt (32) is rotatably connected to the outer wall of the pulley (31). A pulley (33) is rotatably connected to the other end of the transmission belt (32). A drive motor (34) is provided on one side of the pulley (33). The output end of the drive motor (34) is connected to the pulley (33).

4. The ventilation and cooling equipment for a cleanroom according to claim 2, characterized in that: The outer wall of the rotating rod (21) is provided with a limiting groove (41), which penetrates through multiple layers of the rotating bracket (22). A sliding block (42) is slidably connected inside the rotating rod (21). A limiting plate (43) is rotatably connected to the outer wall of the sliding block (42). The limiting plate (43) corresponds to the limiting groove (41). One end of the rotating rod (21) is provided with an electric telescopic rod (44), and the output end of the electric telescopic rod (44) is connected to one side of the sliding block (42).

5. The ventilation and cooling equipment for a cleanroom according to claim 1, characterized in that: Pressure sensor 1 (51) is provided on one side of each of the multiple filter elements near the air inlet (4), and pressure sensor 2 (52) corresponding to pressure sensor 1 (51) is provided on the other side of the multiple filter elements.

6. The ventilation and cooling equipment for a cleanroom according to claim 4, characterized in that: Multiple return springs (61) are provided between the limiting plate (43) and the sliding block (42), and the two ends of the return springs (61) are respectively connected to the limiting plate (43) and the sliding block (42).

7. The ventilation and cooling equipment for a cleanroom according to claim 1, characterized in that: One end of the rotating shaft (13) is fixedly connected to a pulley three (71), the outer wall of the pulley three (71) is rotatably connected to a transmission belt two (72), the other end of the transmission belt two (72) is rotatably connected to a pulley four (73), and multiple pulleys four (73) are fixedly connected to a drive shaft (74). A drive motor two (75) is provided on one side of the drive shaft (74), and the output end of the drive motor two (75) is connected to the drive shaft (74).

8. The ventilation and cooling equipment for a cleanroom according to claim 1, characterized in that: Each of the fixed rings (10) is provided with a fixed air pipe (81) on the side near the vent (5), and a plurality of nozzles (82) are fixedly connected to the inner wall of the fixed air pipe (81).

Images