Ventilation device for clean workshop

Abstract

The invention discloses a ventilation device for a clean workshop, and belongs to the technical field of clean workshop ventilation, the ventilation device comprises a ventilation main body arranged outside the workshop at equal intervals, the ventilation main body comprises a fan body, a filter channel, a connecting channel and a dust collection drawer, the fan body is arranged on one side of the filter channel, and the filter channel is arranged on the other side of the fan body; a cylindrical ventilation pipeline is arranged in the middle of the filtering channel, the ventilation pipeline is communicated with a connecting channel installed at the top end of the filtering channel, and the bottom of the connecting channel is communicated with a ventilation opening in the top end of the workshop. The cleaning device has the beneficial effects that the cleaning assembly capable of performing lifting movement is arranged, the rotary cleaning brush capable of moving up and down can perform all-directional cleaning on the surface and the interior of the filter plate, dust and impurities on the surface can be removed, deep fibers and filter holes of the filter plate can also be deepened, accumulated pollutants are removed, and it is ensured that no cleaning dead angle exists.

Description

Technical Field

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

[0002] A clean workshop is a special production or experimental site with strict requirements for environmental parameters such as air cleanliness, temperature, humidity, and pressure. It is widely used in industries such as electronics, pharmaceuticals, food, and medical. During the production and processing inside the clean workshop in industries such as electronics, pharmaceuticals, food, and medical, various pollutants will be generated, such as dust, particulate matter, harmful gases, microorganisms, etc. The ventilation device can dilute, displace, and discharge these pollutants by sending in filtered clean air, thereby maintaining the air cleanliness in the workshop and meeting the requirements of the production process for air quality. When the existing ventilation devices on the market are working, the outside air is sucked by the fan assembly, and the dust and impurities in the air are filtered by the filter assembly, and then reach the inside of the workshop to complete the ventilation work, such as the ventilation principle disclosed in a smart-controlled clean workshop ventilation system with the application number 202211639173.9.

[0003] However, in the above application, when ventilating 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 blocked, affecting the ventilation efficiency. Therefore, it is necessary to design a ventilation device that can clean the filter assembly, and its ventilation position is mostly at the top of the workshop, and the air mainly circulates in the top area, making it difficult to be evenly distributed to the middle and bottom areas of the workshop. This will result in significant differences in air cleanliness, temperature, and humidity in different areas of the workshop. However, for the cleaning component disclosed in a clean workshop ventilation system with the application number 202411512051.2, its cleaning only rotates the brush on the support plate for cleaning work, and can only clean the surface of the filter plate, but cannot dredge the mesh holes inside it. As a result, the cleaning efficiency is not high, the production cost is high, the efficiency is poor, and the cost performance is not high. Summary of the Invention

[0004] One of the purposes of the present application is to provide a ventilation device for a clean workshop to solve the problems that the ventilation position of the ventilation device in the existing clean workshop is too fixed and it cannot be cleaned thoroughly and efficiently.

[0005] To achieve the above objectives, the technical solution adopted in the present 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 drawer, the fan body is arranged on one side of the filter channel, a cylindrical ventilation duct is arranged in the middle of the filter channel, and the ventilation duct and the connecting channel installed at the top of the filter channel are penetrated, the bottom of the connecting channel is penetrated with the vent at the top of the workshop, a dust drawer is arranged at the bottom of the filter channel, for collecting impurities shaken off after filtration, and a mobile ventilation assembly engaged with the vent at the top of the workshop is also arranged at the bottom of the vent at the top of the workshop, for performing mobile ventilation work, the height of the mobile ventilation assembly corresponds to the height of the workshop, and is used to perform fixed-point and efficient ventilation work 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, 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 a bolt installation or a clamping 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 arranged at the outer side of the top of the filter plate, and the dust bag is clamped in the gap between the support rods 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 component is arranged inside the mobile air duct, and a locking air duct is arranged at the top of the mobile component. The locking air duct is used to be locked with the ventilation port at the top of the workshop. A mobile roller is also arranged 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 an upper cavity and a lower cavity are arranged at the upper and lower positions thereof 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 arranged on the four outer walls of the air duct body for air supply and ventilation.

[0009] Preferably, a rubber sealing component 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 component.

[0010] Preferably, the moving component includes a servo motor, a rotating lead screw, a moving sleeve, and a connecting rod. The servo motor is arranged inside the lower cavity, and the rotating lead screw coaxially connected to its top penetrates the lower cavity and is arranged inside the upper cavity. The outer part of the rotating lead screw is threadedly connected with the moving sleeve, and the outer part of the moving sleeve is fixed to the inner wall of the engaging air duct through connecting rods distributed at equal angles.

[0011] Preferably, the cleaning component 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 component. An intermediate rod is arranged on the inner wall of the rotating ring and connected to the intermediate cylinder. A lifting component is arranged in the middle of the intermediate cylinder and connected to the lifting rod. Cleaning brushes are distributed at equal angles at the top of the lifting rod. The top of the lifting rod penetrates through the perforation in the middle of the filter plate, and the cleaning brush is arranged at the top of the filter plate for rotating and lifting dust cleaning work on the filter plate.

[0012] Preferably, the driving component is arranged in the reserved space between the filter channel and the ventilation duct. The driving component includes a driving motor, a fixed frame, a driving gear, and a steering gear set. The top of the driving motor penetrates the fixed frame and is connected to one side of the steering gear set. The steering gear set includes two sets of vertically arranged bevel gears. The bottom of the horizontally arranged bevel gear is connected to the bottom of the driving motor, and the top penetrates the fixed frame and is connected to the driving gear. The driving gear meshes with the tooth blocks on the outer side of the rotating ring. The outer side of the vertically arranged bevel gear penetrates the fixed frame and is connected to the rotating component.

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

[0014] Preferably, the lifting component includes a compression spring and a connecting plate. Two connecting plates are symmetrically arranged outside the lifting rod, and the connecting plates move up and down in the symmetrically reserved grooves on the inner wall of the intermediate cylinder. Compression springs are arranged at both the upper and lower positions of the connecting plates and connected to the inner walls of the reserved grooves.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: (1) A cleaning component capable of lifting and moving is provided. The vertically moving rotating cleaning brush can comprehensively clean the surface and inside of the filter plate. It can not only remove dust and impurities on the surface, but also penetrate into the deep fibers and pores of the filter plate to remove accumulated pollutants, ensuring no cleaning dead corners. At the same time, it can also reduce the chance of microbial growth, which is crucial for maintaining the sanitary conditions in the workshop and preventing cross-contamination, especially in industries such as pharmaceuticals and food processing.

[0016] (2) The automated lifting and rotating cleaning brush can achieve a more efficient cleaning process, reduce the dependence on manual cleaning, ensure that the filter plate is always in good working condition, and has a higher cost performance.

[0017] (3) A mobile ventilation component is provided, which can improve the flexibility of ventilation of the entire device. The 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 change of the production position to ensure that each area can be effectively ventilated. In some cases, temporary ventilation may be required for a specific area, such as during 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 position to provide immediate ventilation support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the present invention.

[0019] Figure 2 It is a top view structural schematic diagram of the present invention.

[0020] Figure 3 It is a corresponding structural schematic diagram of the ventilation main body and the mobile ventilation component of the present invention.

[0021] Figure 4 It is a half-sectional structural schematic diagram of the engagement between the mobile ventilation component of the present invention and the ventilation opening at the top of the workshop.

[0022] Figure 5 It is a half-sectional structural schematic diagram of the mobile ventilation component of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the mobile ventilation component of the present invention.

[0024] Figure 7 It is a half-sectional structural schematic diagram of the filter channel of the present invention.

[0025] Figure 8 It is a split structural schematic diagram of the fixed cover, dust removal cloth bag, filter plate and cleaning component of the present invention.

[0026] Figure 9 It is an installation structural schematic diagram of the filter component and the cleaning component of the present invention.

[0027] Figure 10 It is a bottom view structural schematic diagram of the drive component and the rotating component of the present invention.

[0028] Figure 11 It is of the present invention Figure 10 Enlarged structural schematic diagram at position A.

[0029] In the figure: 1. Ventilation main body; 11. Fan main body; 12. Filter channel; 121. Ventilation duct; 13. Connection channel; 14. Dust collection drawer; 2. Movable ventilation component; 21. Movable air duct; 211. Air duct main body; 212. Upper cavity; 213. Lower cavity; 214. Ventilation plate; 22. Clamping air duct; 23. Movable component; 231. Servo motor; 232. Rotating lead screw; 233. Movable sleeve; 234. Connecting rod; 24. Movable roller; 3. Filter plate; 4. Cleaning component; 41. Rotating ring; 42. Intermediate rod; 43. Intermediate cylinder; 44. Lifting rod; 45. Cleaning brush; 5. Fixed cover; 6. Dust removal cloth bag; 7. Driving component; 71. Driving motor; 72. Fixed frame; 73. Driving gear; 74. Steering gear set; 8. Rotating component; 81. Rotating rod; 82. Cam; 9. Compression spring; 10. Connecting plate. Specific embodiments

[0030] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be combined arbitrarily to form new embodiments.

[0031] In the description of the present application, it should be noted that for orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence.

[0033] One of the preferred embodiments of the present application is as Figures 1 to 11As shown in the figure, a ventilation device for a clean workshop includes ventilation main bodies 1 arranged at equal intervals outside the workshop. The ventilation main body 1 includes a fan body 11, a filtering channel 12, a connecting channel 13, and a dust collection drawer 14. The fan body 11 is arranged on one side of the filtering channel 12. A cylindrical ventilation duct 121 is arranged in the middle of the filtering channel 12, and the ventilation duct 121 penetrates through the connecting channel 13 installed at the top end of the filtering channel 12. The bottom of the connecting channel 13 penetrates through the ventilation opening at the top end of the workshop. A dust collection drawer 14 is arranged at the bottom of the filtering channel 12 for collecting the impurities shaken off after filtering. A movable ventilation component 2 that is engaged with it is also arranged at the bottom of the ventilation opening at the top end of the workshop for performing movable ventilation work. The height of the movable ventilation component 2 corresponds to the height of the workshop for performing fixed-point and efficient ventilation work according to the processing position in the workshop.

[0034] This application provides a ventilation device for a clean workshop with a movable ventilation component 2. Specifically, when in use, first, start the external fan body 11 to make it start sucking the external air, and then reach the ventilation duct 121 inside the filtering channel 12. After being filtered by the filtering component inside the ventilation duct 121, it reaches the inside of the connecting channel 13, and then passes through the connecting channel 13 to reach the ventilation opening at the top end of the workshop, and thus is introduced into the workshop to complete the ventilation work.

[0035] During the ventilation process, when in an emergency and it is necessary to flexibly ventilate a certain area inside the workshop, at this time, it is necessary to control the movable ventilation component 2 to move inside the workshop. By moving it to the corresponding ventilation opening position at the top end of the workshop and engaging the movable ventilation component 2 with the ventilation opening at the top end of the workshop, at this time, through the auxiliary work of the movable ventilation component 2, the different production positions inside the workshop can be ventilated flexibly, achieving the purpose of adapting to different production areas and meeting various temporary ventilation requirements.

[0036] Among them, when the gas passes through the filtering channel 12, according to Figure 7 、 Figure 8 and Figure 9As shown, the cross-sections of the filtering 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 penetrates through the fan body 11. A filtering component and a cleaning component 4 are arranged at the middle position of the ventilation duct 121. The filtering component includes a filter plate 3, a fixing cover 5 and a dust removal cloth bag 6. The filter plate 3 is detachably installed in the middle of the ventilation duct 121, and its detachable installation method is any one of bolt installation or snap fit installation. At the top of the filter plate 3, two support rods are symmetrically arranged and connected to the bottom of the fixing cover 5. At a position slightly outside the top of the filter plate 3, a dust removal cloth bag 6 is also arranged, and the dust removal cloth bag 6 is snap-fitted in the gap between the support rod and the ventilation duct 121.

[0037] Specifically, the external fan body 11 introduces gas into the interior of the ventilation duct 121. Then, when moving upward, it will reach the position of the filter plate 3, and the filtering work is carried out through the filter plate 3. After that, the gas reaching the position of the filter plate 3 diffuses around under the block of the fixing cover 5, and then is filtered again under the action of the dust removal cloth bag 6. Finally, it reaches the top of the ventilation duct 121 and enters the interior of the connecting channel 13 to complete the filtering work.

[0038] Further, when the mobile ventilation component 2 is snap-fitted with the ventilation holes 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 snap-fitting air duct 22, a mobile component 23 and mobile rollers 24. A mobile component 23 is arranged inside the mobile air duct 21. At the top of the mobile component 23, a snap-fitting air duct 22 is arranged. The snap-fitting air duct 22 is used for snap-fitting with the ventilation openings at the top of the workshop. Mobile rollers 24 are also arranged at the bottom of the mobile air duct 21 to control the position movement of the entire mobile air duct 21.

[0039] The mobile air duct 21 includes an air duct main body 211, an upper cavity 212, a lower cavity 213 and a ventilation plate 214. The cross-section of the air duct main body 211 is arranged in a rectangular structure. An upper cavity 212 and a lower cavity 213 are respectively arranged at the upper and lower positions inside it. The top of the upper cavity 212 penetrates through the top of the air duct main body 211. The lower cavity 213 is arranged at a position closer to the bottom of the air duct main body 211. Ventilation plates 214 with mesh holes are arranged on the four outer walls of the air duct main body 211 for air supply and ventilation work.

[0040] A rubber sealing assembly is provided on the outer wall of the clamping air duct 22 for sealing work, and its outer wall is clamped with the inner wall of the ventilation opening at the top of the workshop. The clamping air duct 22 moves up and down with the moving assembly 23.

[0041] The moving assembly 23 includes a servo motor 231, a rotating lead 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 lead screw 232 coaxially connected to its top penetrates the lower cavity 213 and is arranged inside the upper cavity 212. The outer part of the rotating lead screw 232 is threadedly connected with the moving sleeve 233, and the outer part of the moving sleeve 233 is fixed to the inner wall of the clamping air duct 22 through the connecting rods 234 distributed at equal angles.

[0042] Specifically, first, the servo motor 231 needs to be started to drive the rotating lead screw 232 to rotate. When the rotating lead screw 232 rotates, it will be threadedly connected with the moving sleeve 233. Thus, the moving sleeve 233 drives the clamping air duct 22 to move upward under the action of the connecting rod 234. When the clamping air duct 22 moves upward, its outer wall will be clamped with the ventilation hole. With the setting of the rubber sealing assembly, the clamping installation work can be completed. After that, the gas reaching the ventilation opening position will reach the inside of the upper cavity 212. Then, it flows into the clean room through the four ventilation plates 214 outside the upper cavity 212, thereby achieving the purpose of flexibly and efficiently ventilating the specified area.

[0043] As a further preference of this embodiment, during cleaning, according to Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 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. Tooth blocks are evenly distributed on the outer wall of the rotating ring 41, and its outside is driven and controlled by the driving assembly 7. An intermediate rod 42 is arranged on the inner wall of the rotating ring 41 and connected to the intermediate cylinder 43. A lifting assembly is arranged in the middle of the intermediate cylinder 43 and connected to the lifting rod 44. Cleaning brushes 45 are distributed at equal angles at the top of the lifting rod 44. The top of the lifting rod 44 penetrates the through hole in the middle of the filter plate 3, and the cleaning brushes 45 are arranged on the top of the filter plate 3 for rotating and lifting dust cleaning work on the filter plate 3.

[0044] The driving component 7 is arranged in the reserved space between the filtering channel 12 and the ventilation duct 121. The driving component 7 includes a driving motor 71, a fixing frame 72, a driving gear 73 and a steering gear set 74. The top end of the driving motor 71 penetrates through the fixing frame 72 and is connected to one side of the steering gear set 74. The steering gear set 74 includes 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 penetrates through the fixing frame 72 and is connected to the driving gear 73. The driving gear 73 meshes with the tooth blocks on the outer side of the rotating ring 41. The outer side of the vertically arranged bevel gear penetrates through the fixing frame 72 and is connected to the rotating component 8.

[0045] The rotating component 8 includes a rotating rod 81 and a cam 82. The top end of the rotating rod 81 is coaxially connected to the 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.

[0046] The lifting component includes a compression spring 9 and a connecting plate 10. Two connecting plates 10 are symmetrically arranged outside the lifting rod 44, and the connecting plates 10 move up and down in the reserved slots symmetrically arranged on the inner wall of the middle cylinder 43. Compression springs 9 are arranged at both the upper and lower positions of the connecting plates 10 and are connected to the inner walls of the reserved slots.

[0047] Specifically, when cleaning the filter plate 3, first, the driving motor 71 needs to be started, so that it drives the steering gear set 74 at its top end to rotate. When it rotates, first, in the horizontal position, the driving gear 73 will rotate. When the driving gear 73 rotates, it will mesh with the tooth blocks on the outer wall of the rotating ring 41, so that the rotating ring 41 rotates and drives the middle cylinder 43 to rotate through the middle rod 42. When the middle cylinder 43 rotates, since there are reserved slots inside it for engaging with the connecting plates 10, the middle cylinder 43 will make the lifting rod 44 rotate. When the lifting rod 44 rotates, it drives the cleaning brush 45 to rotate. Therefore, the bristles at the bottom of the cleaning brush 45 will perform rotary dust removal work on the surface of the filter plate 3.

[0048] At the same time, when the steering gear set 74 in the horizontal position rotates, it will also make the rotating rod 81 rotate. When it rotates, it will make the cam 82 continuously move the lifting rod 44 up and down, so that the connecting plate 10 squeezes and resets the compression spring 9. Thus, the lifting rod 44 continuously moves up and down to drive the cleaning brush 45 to move up and down. Therefore, the impurities inside the filter plate 3 and in the filter holes can be cleaned. The cleaned impurities fall to the dust collection drawer 14 at the bottom of the filtering channel 12 to complete the collection work.

[0049] In this application, when cleaning is carried out, it is necessary to control the fan body 11 to be in a closed state. At the same time, a pulse generator can also be set on the inner wall of the top end of the ventilation duct 121, so that its electromagnetic pulse valve is instantaneously opened to release high-pressure compressed air of 0.4 - 0.6 MPa. The compressed air is ejected through the orifices of the blowpipe to form a high-speed air flow, which impacts the dust removal bag 6, causing it to instantaneously expand and vibrate. This instantaneous expansion and vibration cause the dust layer on the surface of the dust removal bag 6 to flake off in sheets and fall above the filter plate 3, and then rotate along with the rotating cleaning brush 45 for cleaning work, thereby achieving the purpose of thorough dust removal and cleaning.

[0050] The above describes the basic principle, main features and advantages of this application. Those skilled in the art of this industry should understand that this application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of this application. Without departing from the spirit and scope of this application, this application will have various changes and improvements, and these changes and improvements all fall within the scope of this application claimed. The scope of protection required by this 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, the ventilation body (1) comprising a fan body (11), a filter channel (12), a connecting channel (13) and a dust collecting drawer (14), the fan body (11) being arranged on one side of the filter channel (12), a cylindrical ventilation duct (121) being 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) being interpenetrated, the bottom of the connecting channel (13) and the ventilation opening at the top of the workshop being interpenetrated, a dust collecting drawer (14) being arranged at the bottom of the filter channel (12) for collecting impurities shaken off after filtering, a mobile ventilation assembly (2) being engaged with the mobile ventilation assembly (2) being arranged at the bottom of the ventilation opening at the top of the workshop for performing mobile ventilation, the height of the mobile ventilation assembly (2) corresponding to the height of the workshop, and being used for performing fixed-point efficient ventilation according to the processing position of the workshop; the mobile ventilation assembly (2) comprising a mobile air duct (21), an engaging air duct (22) , a moving assembly (23) and a moving roller (24), wherein the moving air duct (21) is provided with a moving assembly (23) inside, a snap-fit air duct (22) is provided at the top of the moving assembly (23), the snap-fit air duct (22) is used to snap-fit with the vent at the top of the workshop, and a moving roller (24) is further provided at the bottom of the moving air duct (21) for controlling the entire moving air duct (21) to move its position; the moving air duct (21) comprises an air duct body (211), an upper cavity (21 2), a lower cavity (213) and a ventilation plate (214), wherein the cross-section of the air duct body (211) is arranged in a rectangular structure, and an upper cavity (212) and a lower cavity (213) are arranged at upper and lower positions inside the air duct body, respectively, the top end of the upper cavity (212) passes through the top end of the air duct body (211), and the lower cavity (213) is arranged toward the bottom position of the air duct body (211), and ventilation plates (214) with mesh holes are arranged on the four outer walls of the air duct body (211) for air supply and ventilation.

2. The ventilation device for a clean workshop according to claim 1, characterized in that: The cross-sections of the filter channel (12) and the connecting channel (13) are both rectangular structures; the ventilation duct (121) is cylindrical; the ventilation duct (121) and the fan body (11) penetrate each other; a filter assembly and a cleaning assembly (4) are arranged in the middle of the ventilation duct (121); the filter assembly comprises a filter plate (3), a fixing cover (5) and a dust bag (6); the filter plate (3) is detachably mounted in the middle of the ventilation duct (121); and the detachable mounting method is either bolt mounting or snap-fit mounting; two support rods are symmetrically arranged at the top of the filter plate (3) and connected to the bottom of the fixing cover (5); a dust bag (6) is also arranged at the outer side of the top of the filter plate (3); and the dust bag (6) is snap-fitted in the gap between the support rods and the ventilation duct (121).

3. The ventilation device for a clean workshop according to claim 1, characterized in that: The outer wall of the clamping air duct (22) is provided with a rubber sealing component for sealing work, and its outer wall is clamped with the inner wall of the ventilation opening at the top of the workshop. The clamping air duct (22) moves up and down along with the moving component (23).

4. The ventilation device for a clean workshop according to claim 3, characterized in that: The moving component (23) includes a servo motor (231), a rotating lead 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 lead screw (232) coaxially connected to its top penetrates through the lower cavity (213) and is arranged inside the upper cavity (212). The outer part of the rotating lead screw (232) is threadedly connected with a moving sleeve (233), and the outer part of the moving sleeve (233) is fixed to the inner wall of the clamping air duct (22) through connecting rods (234) distributed at equal angles.

5. The ventilation device for a clean workshop according to claim 2, characterized in that: The cleaning component (4) includes 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 its outside is driven and controlled by a driving component (7). An intermediate rod (42) is arranged on the inner wall of the rotating ring (41) and is connected to the intermediate cylinder (43). A lifting component is arranged in the middle of the intermediate cylinder (43) and is connected to the lifting rod (44). Cleaning brushes (45) are distributed at equal angles at the top of the lifting rod (44). The top of the lifting rod (44) penetrates through the through hole in the middle of the filter plate (3), and the cleaning brush (45) is arranged on the top of the filter plate (3) for performing rotational and lifting dust cleaning work on the filter plate (3).

6. The ventilation device for a clean workshop according to claim 5, wherein: The driving component (7) is arranged in the reserved space between the filter channel (12) and the ventilation duct (121). The driving component (7) includes a driving motor (71), a fixed frame (72), a driving gear (73) and a steering gear set (74). The top of the driving motor (71) penetrates 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 driving motor (71), and the top penetrates through the fixed frame (72) and is connected to the driving gear (73). The driving gear (73) meshes with the tooth blocks on the outside of the rotating ring (41). The outside of the vertically arranged bevel gear penetrates through the fixed frame (72) and is connected to the rotating component (8).

7. The ventilation device for a clean workshop according to claim 6, wherein: The rotating component (8) includes a rotating rod (81) and a cam (82). The top of the rotating rod (81) is coaxially connected to the vertically arranged bevel gear. The top 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).

8. The ventilation device for a clean workshop according to claim 7, wherein: The lifting assembly includes a compression spring (9) and a connecting plate (10). Two connecting plates (10) are symmetrically arranged outside the lifting rod (44), and the connecting plates (10) move up and down in reserved grooves symmetrically provided on the inner wall of the middle cylinder (43). Compression springs (9) are arranged at both the upper and lower positions of the connecting plates (10) and are connected to the inner walls of the reserved grooves.

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