A ventilation device for clean workshop

Abstract

The present application discloses a ventilation device for a clean workshop, which belongs to the field of clean workshop ventilation technology, and includes ventilation bodies arranged at equal intervals outside the workshop, the ventilation bodies including a fan body, a filter channel, a connecting channel and a dust collection drawer, the fan body being arranged on one side of the filter channel, a cylindrical ventilation duct being arranged in the middle of the filter channel, and the ventilation duct and the connecting channel installed at the top of the filter channel being interpenetrated, and the bottom of the connecting channel being interpenetrated with the ventilation opening at the top of the workshop. The beneficial effects of the present application are as follows: a cleaning component that can be lifted and moved is provided, and a rotating cleaning brush that moves up and down can perform all-round cleaning on the surface and interior of the filter plate, which can not only remove dust and impurities on the surface, but also penetrate deep fibers and filter holes of the filter plate to remove accumulated pollutants, ensuring that there are no cleaning dead corners.

Description

Technical Field

[0001] The present application relates to the technical field of clean workshop ventilation, and in particular to a ventilation device for a clean workshop. Background Art

[0002] A cleanroom is a special production or experimental site with strict requirements on environmental parameters such as air cleanliness, temperature, humidity, and pressure. It is widely used in the electronics, pharmaceutical, food, and medical industries. During the production and processing inside the cleanroom, various pollutants such as dust, particulate matter, harmful gases, and microorganisms are generated. Ventilation devices can dilute, replace, and discharge these pollutants from the workshop by introducing filtered clean air, thereby maintaining the cleanliness of the air in the workshop and meeting the air quality requirements of the production process. When the ventilation devices currently on the market are working, the outside air is sucked in by the fan assembly, and the dust and impurities in the air are filtered out by the filter assembly. Then, the air reaches the interior of the workshop to complete the ventilation work. For example, the ventilation principle disclosed in the intelligently controlled cleanroom ventilation system of application number 202211639173.9 is disclosed.

[0003] However, in the above application, when ventilation is carried out inside the workshop, the service life of the filter assembly is short and it needs to be frequently disassembled and cleaned, otherwise the filter assembly will be clogged, affecting the ventilation efficiency. Therefore, it is necessary to design a ventilation device that can clean the filter assembly, and the ventilation position is mostly located at the top of the workshop. The air mainly circulates in the top area and is difficult to be evenly distributed to the middle and bottom areas of the workshop. This will lead to significant differences in air cleanliness, temperature and humidity in different areas of the workshop. However, the cleaning assembly disclosed in the clean workshop ventilation system of application number 202411512051.2 is only cleaned by rotating the brush on the support plate, which can only clean the surface of the filter plate but cannot dredge the mesh inside it. As a result, the cleaning efficiency is low, the production cost is high, the efficiency is poor, and the cost-effectiveness is not high. Summary of the Invention

[0004] One of the purposes of the present application is to provide a ventilation device for clean workshops to solve the problems of ventilation devices in the existing market in clean workshops, such as the ventilation position is too fixed and thorough and efficient cleaning cannot be performed.

[0005] To achieve the above objectives, the technical solution adopted in this application is: a ventilation device for a clean workshop, comprising a ventilation body arranged at equal intervals outside the workshop, the ventilation body comprising a fan body, a filter channel, a connecting channel and a dust collection drawer, the fan body being arranged on one side of the filter channel, a cylindrical ventilation duct being arranged in the middle of the filter channel, and the ventilation duct and the connecting channel installed at the top of the filter channel being penetrated, the bottom of the connecting channel being penetrated by the vent at the top of the workshop, a dust collection drawer being arranged at the bottom of the filter channel for collecting impurities shaken off after filtration, a mobile ventilation assembly being engaged with the mobile ventilation assembly at the bottom of the vent at the top of the workshop being further provided for performing mobile ventilation, the height of the mobile ventilation assembly corresponding to the height of the workshop being used for performing fixed-point and efficient ventilation according to the processing position of the workshop.

[0006] Preferably, the cross-sections of the filter channel and the connecting channel are both arranged in a rectangular structure, the ventilation duct is arranged in a cylindrical structure, the ventilation duct and the fan body penetrate each other, and a filter assembly and a cleaning assembly are arranged in the middle position of the ventilation duct, the filter assembly includes a filter plate, a fixed cover and a dust bag, the filter plate is removably installed in the middle of the ventilation duct, and its removable installation method is either bolt installation or snap-on installation, two support rods are symmetrically arranged at the top of the filter plate and connected to the bottom of the fixed cover, a dust bag is also provided at the outer position of the top of the filter plate, and the dust bag is snapped in the gap between the support rod and the ventilation duct.

[0007] Preferably, the mobile ventilation component includes a mobile air duct, a locking air duct, a mobile component and a mobile roller. The mobile air duct is provided with a mobile component inside, and the locking air duct is provided at the top of the mobile component. The locking air duct is used to engage with the ventilation port at the top of the workshop. A mobile roller is also provided at the bottom of the mobile air duct for controlling the entire mobile air duct to move its position.

[0008] Preferably, the mobile air duct includes an air duct body, an upper cavity, a lower cavity and a ventilation plate. The cross-section of the air duct body is arranged in a rectangular structure, and the upper cavity and the lower cavity are arranged at the upper and lower positions inside it respectively. The top of the upper cavity passes through the top of the air duct body, and the lower cavity is arranged toward the bottom position of the air duct body. Ventilation plates with mesh holes are provided on the four outer walls of the air duct body for air supply and ventilation.

[0009] Preferably, a rubber sealing assembly is provided on the outer wall of the engaging air duct for sealing, and the outer wall thereof is engaged with the inner wall of the vent at the top of the workshop, and the engaging air duct moves up and down along with the moving assembly.

[0010] Preferably, the moving assembly includes a servo motor, a rotating screw, a moving sleeve and a connecting rod. The servo motor is arranged inside the lower cavity, and the rotating screw coaxially connected to its top end passes through the lower cavity and is arranged inside the upper cavity. The external thread of the rotating screw is connected to the moving sleeve, and the outside of the moving sleeve is fixed to the inner wall of the clamping air duct through connecting rods distributed at equal angles.

[0011] Preferably, the cleaning assembly includes a rotating ring, an intermediate rod, an intermediate cylinder, a lifting rod and a cleaning brush. Tooth blocks are evenly distributed on the outer wall of the rotating ring, and its outer side is driven and controlled by a driving assembly. An intermediate rod is provided on the inner wall of the rotating ring and is connected to the intermediate cylinder. A lifting assembly is provided in the middle of the intermediate cylinder and is connected to the lifting rod, and cleaning brushes are distributed at equal angles on the top of the lifting rod. The top of the lifting rod passes through the through-hole in the middle of the filter plate, and the cleaning brush is provided at the top of the filter plate for performing a rotating and lifting dust cleaning operation on the filter plate.

[0012] Preferably, the drive assembly is arranged in the reserved space between the filter channel and the ventilation duct, and the drive assembly includes a drive motor, a fixed frame, a driving gear and a steering gear set. The top of the drive motor passes through the fixed frame and is connected to one side of the steering gear set. The steering gear set includes two groups of vertically arranged bevel gears, the bottom of the horizontally arranged bevel gear is connected to the bottom of the drive motor, and the top passes through the fixed frame and is connected to the driving gear. The driving gear is engaged with the tooth block on the outside of the rotating ring, and the outer side of the vertically arranged bevel gear passes through the fixed frame and is connected to the rotating assembly.

[0013] Preferably, the rotating assembly includes a rotating rod and a cam, the top end of the rotating rod is coaxially connected to the vertically arranged bevel gear, the top end of the rotating rod is coaxially connected to the cam, and the cam is arranged at the bottom of the lifting rod.

[0014] Preferably, the lifting assembly includes a compression spring and a connecting plate, and two connecting plates are symmetrically arranged on the outside of the lifting rod, and the connecting plates move up and down in symmetrical reserved grooves on the inner wall of the intermediate cylinder, and compression springs are arranged at the upper and lower positions of the connecting plates to connect with the inner wall of the reserved groove.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) A cleaning component that can be lifted and lowered is provided. The rotating cleaning brush that moves up and down can clean the surface and interior of the filter plate in all directions. It can not only remove dust and impurities on the surface, but also penetrate deep fibers and filter holes of the filter plate to remove accumulated pollutants, ensuring that there are no dead corners for cleaning. At the same time, it can also reduce the chance of microbial growth, which is crucial for maintaining sanitary conditions in the workshop and preventing cross contamination, especially in the pharmaceutical and food processing industries.

[0017] (2) The automated lifting and rotating cleaning brush can achieve a more efficient cleaning process, reduce dependence on manual cleaning, ensure that the filter plate is always in good working condition, and is more cost-effective.

[0018] (3) A mobile ventilation component is provided to improve the flexibility of ventilation of the entire device. Production activities in the clean workshop may be distributed in different areas, and the pollution sources and ventilation requirements in different areas may be different. The mobile ventilation component can flexibly adjust the ventilation position according to the changes in the production location to ensure that each area can be effectively ventilated. In some cases, temporary ventilation of specific areas may be required, such as equipment maintenance, cleaning, sudden pollution incidents, and when the production layout changes with production needs. The mobile ventilation component can be quickly deployed to the required location to provide immediate ventilation support. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the corresponding structures of the ventilation main body and the mobile ventilation assembly of the present invention.

[0022] Figure 4 This is a half-section structural schematic diagram of the mobile ventilation assembly of the present invention engaging with the ventilation opening at the top of the workshop.

[0023] Figure 5 This is a schematic diagram of the half-section structure of the mobile ventilation component of the present invention.

[0024] Figure 6 This is a structural schematic diagram of the mobile ventilation assembly of the present invention.

[0025] Figure 7 This is a schematic diagram of the half-section structure of the filtration channel of the present invention.

[0026] Figure 8 This is a schematic diagram of the disassembled structure of the fixed cover, dust bag, filter plate and cleaning component of the present invention.

[0027] Figure 9 This is a schematic diagram of the installation structure of the filter component and the cleaning component of the present invention.

[0028] Figure 10 It is a bottom view structural diagram of the driving assembly and the rotating assembly of the present invention.

[0029] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle.

[0030] In the figure: 1. ventilation main body; 11. fan body; 12. filter channel; 121. ventilation duct; 13. connecting channel; 14. dust collection drawer; 2. movable ventilation assembly; 21. movable air duct; 211. air duct main body; 212. upper cavity; 213. lower cavity; 214. ventilation plate; 22. engaging air duct; 23. movable assembly; 231. servo motor; 232. rotating screw; 233. movable sleeve; 234. connecting rod; 24. movable roller; 3. filter plate; 4. cleaning assembly; 41. rotating ring; 42. intermediate rod; 43. intermediate cylinder; 44. lifting rod; 45. cleaning brush; 5. fixed cover; 6. dust bag; 7. driving assembly; 71. driving motor; 72. fixing frame; 73. driving gear; 74. steering gear set; 8. rotating assembly; 81. rotating rod; 82. cam; 9. compression spring; 10. connecting plate. DETAILED DESCRIPTION

[0031] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating the orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0034] One of the preferred embodiments of this application is as follows: Figures 1 to 11As shown, a ventilation device for a clean workshop includes a ventilation main body 1 arranged at equal intervals outside the workshop, the ventilation main body 1 includes a fan body 11, a filter channel 12, a connecting channel 13 and a dust collection drawer 14, the fan body 11 is arranged on one side of the filter channel 12, and a cylindrical ventilation duct 121 is arranged in the middle of the filter channel 12, and the ventilation duct 121 and the connecting channel 13 installed at the top of the filter channel 12 are penetrated, and the bottom of the connecting channel 13 is penetrated with the ventilation opening at the top of the workshop, and a dust collection drawer 14 is provided at the bottom of the filter channel 12 for collecting impurities shaken off after filtration, and a mobile ventilation component 2 engaged with the bottom of the ventilation opening at the top of the workshop is also provided for mobile ventilation. The height of the mobile ventilation component 2 corresponds to the height of the workshop, and is used for fixed-point and efficient ventilation according to the processing position of the workshop.

[0035] The present application provides a ventilation device for a clean workshop with a mobile ventilation component 2. Specifically, when in use, first, the external fan body 11 is started, so that it starts to suck the external air, and then reaches the ventilation duct 121 inside the filter channel 12. After being filtered by the filter component inside the ventilation duct 121, it reaches the inside of the connecting channel 13, and then reaches the ventilation port at the top of the workshop through the connecting channel 13, and thus enters the interior of the workshop to complete the ventilation work.

[0036] During the ventilation process, when in an emergency situation, when a certain area inside the workshop needs to be flexibly ventilated, it is necessary to control the mobile ventilation component 2 to move inside the workshop, and move it to the corresponding ventilation hole position at the top of the workshop, and engage the mobile ventilation component 2 with the ventilation hole at the top of the workshop. At this time, through the auxiliary work of the mobile ventilation component 2, different production locations inside the workshop can be flexibly ventilated to achieve the purpose of adapting to different production areas and responding to various temporary ventilation needs.

[0037] Among them, when the gas passes through the filter channel 12, according to Figure 7 、 Figure 8 and Figure 9As shown, the cross-sections of the filter channel 12 and the connecting channel 13 are both arranged in a rectangular structure, the ventilation duct 121 is arranged in a cylindrical structure, the ventilation duct 121 and the fan body 11 penetrate each other, and a filter assembly and a cleaning assembly 4 are arranged in the middle position of the ventilation duct 121, the filter assembly includes a filter plate 3, a fixed cover 5 and a dust bag 6, the filter plate 3 is removably installed in the middle of the ventilation duct 121, and its removable installation method is either bolt installation or snap-on installation, two support rods are symmetrically arranged at the top of the filter plate 3 and connected to the bottom of the fixed cover 5, a dust bag 6 is also provided at the outer position of the top of the filter plate 3, and the dust bag 6 is snapped in the gap between the support rod and the ventilation duct 121.

[0038] Specifically, the external fan body 11 passes the gas into the interior of the ventilation duct 121, and then moves upward to reach the position of the filter plate 3, and is filtered through the filter plate 3. After that, the gas reaching the position of the filter plate 3 is blocked by the fixed cover 5 and diffuses to the surroundings, and then is filtered again under the action of the dust bag 6, and finally reaches the top of the ventilation duct 121, enters the interior of the connecting channel 13, and completes the filtering work.

[0039] Furthermore, when the mobile ventilation assembly 2 is engaged with the ventilation hole at the top of the workshop, it is necessary to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the mobile ventilation component 2 includes a mobile air duct 21, a locking air duct 22, a mobile component 23 and a mobile roller 24. The mobile air duct 21 is provided with a mobile component 23 inside, and the locking air duct 22 is provided at the top of the mobile component 23. The locking air duct 22 is used to engage with the ventilation port at the top of the workshop. The bottom of the mobile air duct 21 is also provided with a mobile roller 24 for controlling the entire mobile air duct 21 to move its position.

[0040] The mobile air duct 21 includes an air duct body 211, an upper cavity 212, a lower cavity 213 and a ventilation plate 214. The cross-section of the air duct body 211 is a rectangular structure, and the upper cavity 212 and the lower cavity 213 are respectively arranged at the upper and lower positions inside it. The top of the upper cavity 212 passes through the top of the air duct body 211, and the lower cavity 213 is arranged toward the bottom position of the air duct body 211. The four outer walls of the air duct body 211 are provided with ventilation plates 214 with mesh holes for air supply and ventilation.

[0041] A rubber sealing component is provided on the outer wall of the engaging air duct 22 for sealing, and the outer wall thereof is engaged with the inner wall of the vent at the top of the workshop. The engaging air duct 22 moves up and down along with the moving component 23 .

[0042] The moving assembly 23 includes a servo motor 231, a rotating screw 232, a moving sleeve 233 and a connecting rod 234. The servo motor 231 is arranged inside the lower cavity 213, and the rotating screw 232 coaxially connected to its top end passes through the lower cavity 213 and is arranged inside the upper cavity 212. The external thread of the rotating screw 232 is connected to the moving sleeve 233, and the outside of the moving sleeve 233 is fixed to the inner wall of the engaged air duct 22 through connecting rods 234 distributed at equal angles.

[0043] Specifically, it is necessary to first start the servo motor 231 so that it drives the rotating screw 232 to rotate. When the rotating screw 232 rotates, it will be threadedly connected with the movable sleeve 233, so that the movable sleeve 233 drives the engaging air duct 22 to move upward under the action of the connecting rod 234. When the engaging air duct 22 moves upward, its outer wall will engage with the ventilation hole. With the setting of the rubber sealing component, the engaging installation work can be completed. Afterwards, the gas reaching the vent position will reach the interior of the upper cavity 212, and then flow to the interior of the clean room through the four ventilation plates 214 outside the upper cavity 212, thereby completing the purpose of flexible and efficient ventilation of the designated area.

[0044] As a further preferred embodiment of the present invention, when cleaning, according to Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 As shown, the cleaning assembly 4 includes a rotating ring 41, an intermediate rod 42, an intermediate cylinder 43, a lifting rod 44 and a cleaning brush 45. The outer wall of the rotating ring 41 is evenly distributed with teeth, and its outer side is driven and controlled by the driving assembly 7. The inner wall of the rotating ring 41 is provided with an intermediate rod 42 connected to the intermediate cylinder 43. The middle of the intermediate cylinder 43 is provided with a lifting assembly connected to the lifting rod 44, and the top of the lifting rod 44 is distributed with cleaning brushes 45 at equal angles. The top of the lifting rod 44 passes through the through-hole in the middle of the filter plate 3, and the cleaning brush 45 is provided at the top of the filter plate 3 for performing a rotating and lifting dust cleaning operation on the filter plate 3.

[0045] The drive assembly 7 is arranged in the reserved space between the filter channel 12 and the ventilation duct 121. The drive assembly 7 includes a drive motor 71, a fixed frame 72, a driving gear 73 and a steering gear set 74. The top of the drive motor 71 passes through the fixed frame 72 and is connected to one side of the steering gear set 74. The steering gear set 74 includes two groups of vertically arranged bevel gears, the bottom of the horizontally arranged bevel gear is connected to the bottom of the drive motor 71, and the top passes through the fixed frame 72 and is connected to the driving gear 73. The driving gear 73 is engaged with the tooth block on the outside of the rotating ring 41, and the outer side of the vertically arranged bevel gear passes through the fixed frame 72 and is connected to the rotating assembly 8.

[0046] The rotating assembly 8 includes a rotating rod 81 and a cam 82 . The top end of the rotating rod 81 is coaxially connected to a vertically arranged bevel gear. The top end of the rotating rod 81 is coaxially connected to the cam 82 , and the cam 82 is arranged at the bottom of the lifting rod 44 .

[0047] The lifting assembly includes a compression spring 9 and a connecting plate 10. Two connecting plates 10 are symmetrically arranged on the outside of the lifting rod 44, and the connecting plates 10 move up and down in the symmetrical reserved grooves on the inner wall of the intermediate cylinder 43. Compression springs 9 are arranged at the upper and lower positions of the connecting plates 10 and connected to the inner wall of the reserved groove.

[0048] Specifically, when cleaning the filter plate 3, first, it is necessary to start the drive motor 71 so that it drives the steering gear set 74 at its top to rotate. When it rotates, it first rotates the driving gear 73 in the horizontal position. When the driving gear 73 rotates, it engages with the tooth block on the outer wall of the rotating ring 41, thereby rotating the rotating ring 41 and driving the intermediate cylinder 43 to rotate through the intermediate rod 42. When the intermediate cylinder 43 rotates, since a reserved groove is provided inside it and engages with the connecting plate 10, the intermediate cylinder 43 causes the lifting rod 44 to rotate. When the lifting rod 44 rotates, it drives the cleaning brush 45 to rotate, so that the bristles at the bottom of the cleaning brush 45 rotate to remove dust from the surface of the filter plate 3.

[0049] At the same time, when the steering gear set 74 in the horizontal position rotates, it will also cause the rotating rod 81 to rotate. When it rotates, the cam 82 will continuously move the lifting rod 44 up and down, thereby causing the connecting plate 10 to squeeze and reset the compression spring 9. As a result, the lifting rod 44 continuously moves up and down, driving the cleaning brush 45 to move up and down, so that the impurities inside the filter plate 3 and the filter holes can be cleaned. The cleaned impurities fall into the dust collection drawer 14 at the bottom of the filter channel 12 to complete the collection work.

[0050] In this application, when cleaning, the fan body 11 needs to be controlled to be in the closed state. At the same time, a pulse generator can be set on the inner wall of the top of the ventilation duct 121 to make its electromagnetic pulse valve open instantly, releasing 0.4-0.6MPa high-pressure compressed air. The compressed air is ejected through the holes of the blowpipe, forming a high-speed airflow, impacting the dust bag 6, causing it to expand and vibrate instantly. This instantaneous expansion and vibration causes the dust layer on the surface of the dust bag 6 to flake off and fall onto the top of the filter plate 3. As the cleaning brush 45 rotates and cleans, the dust is thoroughly removed and cleaned.

[0051] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for a clean workshop, characterized in that: The invention comprises a ventilation body (1) arranged at equal intervals outside a workshop, wherein the ventilation body (1) comprises a fan body (11), a filter channel (12), a connecting channel (13) and a dust collecting drawer (14), wherein the fan body (11) is arranged on one side of the filter channel (12), a cylindrical ventilation duct (121) is arranged in the middle of the filter channel (12), and the ventilation duct (121) and the connecting channel (13) installed at the top of the filter channel (12) are interpenetrated, and the bottom of the connecting channel (13) and the ventilation opening at the top of the workshop are interpenetrated, and a dust collecting drawer (14) is arranged at the bottom of the filter channel (12) for collecting impurities shaken off after filtering, and the bottom of the ventilation opening at the top of the workshop is also interpenetrated. A movable ventilation assembly (2) is provided which is engaged with the movable ventilation assembly (2) and is used for performing movable ventilation work. The height of the movable ventilation assembly (2) corresponds to the height of the workshop and is used for performing fixed-point efficient ventilation work according to the processing position of the workshop. The movable ventilation assembly (2) comprises a movable air duct (21), an engaging air duct (22), a movable assembly (23) and a movable roller (24). The movable air duct (21) is provided with a movable assembly (23) inside, and an engaging air duct (22) is provided at the top of the movable assembly (23). The engaging air duct (22) is used for engaging with the ventilation opening at the top of the workshop. The bottom of the movable air duct (21) is also provided with a movable roller (24) for controlling the position of the entire movable air duct (21). Mobile operation; the mobile air duct (21) comprises an air duct body (211), an upper cavity (212), a lower cavity (213) and a ventilation plate (214); the cross section of the air duct body (211) is arranged in a rectangular structure, and the upper cavity (212) and the lower cavity (213) are arranged at the upper and lower positions inside the air duct body, respectively; the top of the upper cavity (212) passes through the top of the air duct body (211), and the lower cavity (213) is arranged at a position biased towards the bottom of the air duct body (211); ventilation plates (214) with mesh holes are arranged on the four outer walls of the air duct body (211) for air supply and ventilation operation; the cross sections of the filtering channel (12) and the connecting channel (13) are arranged in a rectangular structure, and the ventilation duct (121) is provided with a cylindrical structure, the ventilation duct (121) and the fan body (11) penetrate each other, a filter assembly and a cleaning assembly (4) are provided in the middle position of the ventilation duct (121), the filter assembly comprises a filter plate (3), a fixed cover (5) and a dust bag (6), the filter plate (3) is disassembled and installed in the middle of the ventilation duct (121), and its disassembly and installation method is any one of bolt installation and clamping installation, two support rods are symmetrically provided at the top end of the filter plate (3) and connected to the bottom of the fixed cover (5), a dust bag (6) is also provided at the outer side of the top end of the filter plate (3), and the dust bag (6) is clamped in the gap between the support rod and the ventilation duct (121);A rubber sealing assembly is provided on the outer wall of the snap-fit ​​air duct (22) for sealing, and the outer wall thereof is snap-fitted with the inner wall of the ventilation opening at the top of the workshop. The snap-fit ​​air duct (22) moves up and down along with the moving assembly (23); the moving assembly (23) comprises a servo motor (231), a rotating screw (232), a moving sleeve (233) and a connecting rod (234); the servo motor (231) is arranged inside the lower cavity (213), and the rotating screw (232) coaxially connected to the top of the servo motor (231) passes through the lower cavity (213) and is arranged inside the upper cavity (212); the outer surface of the rotating screw (232) is threadedly connected to the moving sleeve (233), and the outer surface of the moving sleeve (233) is fixed to the inner wall of the snap-fit ​​air duct (22) through the connecting rods (234) distributed at equal angles.

2. A ventilation device for a clean room according to claim 1, characterized in that: The cleaning assembly (4) comprises a rotating ring (41), an intermediate rod (42), an intermediate cylinder (43), a lifting rod (44) and a cleaning brush (45). Tooth blocks are evenly distributed on the outer wall of the rotating ring (41), and the outer side of the rotating ring is driven and controlled by the driving assembly (7). An intermediate rod (42) is provided on the inner wall of the rotating ring (41) and is connected to the intermediate cylinder (43). A lifting assembly is provided in the middle of the intermediate cylinder (43) and is connected to the lifting rod (44). Cleaning brushes (45) are distributed at equal angles on the top of the lifting rod (44). The top of the lifting rod (44) passes through the through hole in the middle of the filter plate (3), and the cleaning brush (45) is provided at the top of the filter plate (3) for performing a rotary lifting dust cleaning operation on the filter plate (3).

3. A ventilation device for a clean room according to claim 2, characterized in that: The driving assembly (7) is arranged in the reserved space between the filter channel (12) and the ventilation duct (121). The driving assembly (7) comprises a driving motor (71), a fixed frame (72), a driving gear (73) and a steering gear set (74). The top end of the driving motor (71) passes through the fixed frame (72) and is connected to one side of the steering gear set (74). The steering gear set (74) comprises two sets of vertically arranged bevel gears. The bottom of the horizontally arranged bevel gear is connected to the bottom of the driving motor (71), and the top end passes through the fixed frame (72) and is connected to the driving gear (73). The driving gear (73) is meshed with the tooth block on the outer side of the rotating ring (41). The outer side of the vertically arranged bevel gear passes through the fixed frame (72) and is connected to the rotating assembly (8).

4. A ventilation device for a clean room according to claim 3, characterized in that: The rotating assembly (8) comprises a rotating rod (81) and a cam (82), wherein the top end of the rotating rod (81) is coaxially connected to a vertically arranged bevel gear, the top end of the rotating rod (81) is coaxially connected to the cam (82), and the cam (82) is arranged at the bottom of the lifting rod (44).

5. A ventilation device for a clean room according to claim 4, characterized in that: The lifting assembly includes a compression spring (9) and a connecting plate (10), wherein two connecting plates (10) are symmetrically arranged outside the lifting rod (44), and the connecting plates (10) move up and down in symmetrical reserved grooves on the inner wall of the intermediate cylinder (43), and compression springs (9) are arranged at the upper and lower positions of the connecting plates (10) to connect with the inner wall of the reserved groove.

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