Clean room air circulation apparatus

Abstract

The present application relates to the field of air conditioning, especially to a clean room air circulation equipment, including fresh air pipeline, fresh air pipeline is communicated with air treatment mechanism, the right upper end of air treatment mechanism is communicated with air supply pipeline, air supply pipeline is communicated with clean room, the left and right sides of clean room are equipped with return air column, the top of return air column is communicated with return air pipeline, return air pipeline is communicated with air treatment mechanism, air treatment mechanism includes box, the inside of box is sequentially provided with primary filter plate, wind turbine generator unit, air humidification mechanism, air heating mechanism, fan and medium efficiency filter from left to right, the present application fully utilizes the wind energy in air treatment mechanism through the setting of wind turbine generator unit, provides electric energy for air humidification mechanism and air heating mechanism, greatly saves the electric energy, plays a good energy-saving effect, through the setting of return air collection-release mechanism, greatly improves the quality of circulating air in clean room and the power generation effect of wind turbine generator unit.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and more particularly to a cleanroom air circulation device. Background Technology

[0002] Cleanroom air circulation equipment refers to equipment used for air circulation and purification in cleanrooms. Its main function is to ensure that the cleanliness, temperature, and humidity of the indoor air meet specific requirements through filtration, heating, and cooling. Cleanroom air circulation equipment is widely used in various places requiring high cleanliness, such as operating rooms, laboratories, electronics factories, and pharmaceutical plants. These places have strict requirements for airborne particles, bacteria, and other pollutants to ensure the safety of the production environment and human health.

[0003] Patent application CN201721620417.3 discloses a novel energy-saving air circulation system for cleanrooms. However, this system suffers from the following drawbacks: 1) It heats the air with a heater and humidifies it with a humidifier, both of which consume significant amounts of electricity, leading to energy waste; 2) Since both the return air in the return duct and the fresh air in the fresh air duct undergo purification simultaneously, the return air displaces the fresh air, significantly reducing the amount of fresh air entering the cleanroom. This results in relatively poor air quality, such as a decrease in oxygen levels. Therefore, there is an urgent need for an energy-efficient air circulation device that can improve cleanroom air quality. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a cleanroom air circulation device that solves the problems existing in the prior art. The present invention makes full use of the wind energy in the air handling unit by setting up a wind turbine generator set, providing power to the air humidification and air heating units in the air handling unit, which greatly saves electricity and achieves a good energy-saving effect.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cleanroom air circulation device, comprising a fresh air duct, which is connected to an air handling unit. The upper right end of the air handling unit is connected to a supply air duct, which is connected to a cleanroom. Return air columns are provided on the left and right sides of the cleanroom, and a return air duct is connected to the top of the return air columns. The return air duct is connected to the air handling unit. The air handling unit includes a housing, and the interior of the housing is arranged from left to right as follows: a primary filter plate, a wind turbine generator set, an air humidification mechanism, an air heating mechanism, a fan, and a medium-efficiency filter.

[0008] Preferably, the air supply duct includes a main air supply pipe connected to the upper right end of the air handling unit, several branch air supply pipes connected to the main air supply pipe, and air outlets connected to the branch air supply pipes. The air outlets are fixed on the ceiling of the clean room and are connected to the interior of the clean room.

[0009] Preferably, the return air duct includes a return air branch pipe connected to the top of the return air column, the return air branch pipe is connected to the return air main pipe, and the return air main pipe is connected to the upper left end of the box and connected to the interior of the box.

[0010] Preferably, a return air collection-release mechanism is provided between the primary filter plate and the fresh air duct. The return air collection-release mechanism includes a connecting pipe connected to the return air main duct. An air collection bag is fixed to the right end of the connecting pipe. Two first magnetic blocks are fixed to the air outlet of the air collection bag. The inner end of a spring is fixed to the outer end of the first magnetic block. The outer end of the spring is fixed to the inner wall of the housing. A through hole is provided on the primary filter plate at the position opposite to the first magnetic block.

[0011] Preferably, the air outlet includes a fixed section fixed to the first magnetic block, and a first telescopic section and a second telescopic section are provided between the upper and lower fixed sections. The first telescopic section is formed by connecting a plurality of first V-shaped sections, wherein the first tip of the first V-shaped section faces inward and exceeds the vertical center line of the first magnetic block. The second telescopic section is formed by connecting a plurality of second V-shaped sections, wherein the second tip of the second V-shaped section faces inward and exceeds the vertical center line of the first magnetic block, and the second tip is located below the first tip.

[0012] Preferably, a second magnetic block is fixed to both outer ends of the bottom surface of the first magnetic block, and the thickness of the second magnetic block is slightly less than the sum of the thicknesses of the first and second telescopic sections after compression.

[0013] Preferably, the air humidification mechanism includes a partition, a water tank is fixed to the bottom of the right side of the partition, a water pump is installed in the water tank, a vertical water outlet pipe is fixedly connected to the outlet of the water pump, a number of horizontal water outlet pipes are evenly distributed on the vertical water outlet pipe, a number of spray heads are installed on the horizontal water outlet pipes, and a number of air passage holes are provided on the partition between adjacent horizontal water outlet pipes.

[0014] Preferably, the air heating mechanism includes a heating base fixedly connected to the water tank, and an aluminum honeycomb panel is fixed on the heating base.

[0015] Preferably, the aluminum honeycomb panel is provided with a number of honeycomb holes, which are arranged in an inclined shape with the left side lower than the right side.

[0016] Preferably, a nano-silver antibacterial gel filter, a photocatalytic filter, and an activated carbon filter are arranged sequentially from left to right between the wind turbine generator set and the air humidification mechanism.

[0017] (III) Beneficial Effects

[0018] 1. This invention makes full use of wind energy in the air handling unit by setting up a wind turbine generator set, providing power to the air humidification and air heating units in the air handling unit, which greatly saves electricity and achieves a good energy-saving effect;

[0019] 2. This invention, through the setting of a return air collection-release mechanism, allows return air from the main return air duct to enter the air collection bag after passing through the connecting pipe. When the amount of return air collected in the air collection bag is insufficient, the upper and lower first magnetic blocks, due to their mutual attraction, press the air outlet together, effectively sealing the air outlet. This prevents return air from participating in air circulation for a certain period, allowing more fresh air from the outside to participate in air circulation, thereby improving the overall air quality of the cleanroom. As more return air enters the air collection bag, the amount of return air in the bag increases, causing the air collection bag to inflate. This inflating process also pulls the upper and lower first magnetic blocks apart. When the air collection bag inflates to a certain extent, the two first magnetic blocks separate. Furthermore, because the spring itself exerts a certain pulling force on the first magnetic blocks, this... The moment the two first magnetic blocks separate, they are quickly pulled outward, opening the air outlet instantly. This allows the return air, which was originally gathered in the air collection bag, to quickly reach the wind turbine through the air outlet and the through-hole. The through-hole is directly opposite the wind turbine rotor. The return air coming out of the air collection bag is not only large in volume and concentrated, but also fast, which greatly improves the efficiency and effect of the wind turbine's power generation. Because the fresh air is relatively dispersed after passing through the primary filter, the power generation effect of the wind turbine may not be ideal. As the return air in the air collection bag is continuously released, the air collection bag will contract until the two first magnetic blocks close the air outlet again, starting the next round of air collection. This cycle repeats, greatly improving the quality of the circulating air in the clean room and the power generation effect of the wind turbine.

[0020] 3. The present invention configures the air outlet to consist of two fixed sections, a first telescopic section and a second telescopic section, wherein the first tip and the second tip are both set to extend beyond the vertical center line, and the second tip is located below the first tip. In this way, when the first telescopic section and the second telescopic section are compressed, the first tip and the second tip will overlap alternately, which will play a good sealing role.

[0021] 4. The present invention, through the setting of an air humidification mechanism and an air heating mechanism, can fully humidify and heat the air, and can effectively prevent water mist from escaping to the left and right sides. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall invention.

[0023] Figure 2 For the present invention Figure 1 A diagram showing the cleanroom after part of it has been cut off.

[0024] Figure 3 This is a schematic diagram of the air handling mechanism and fresh air duct of the present invention.

[0025] Figure 4 This is a schematic diagram of the fresh air duct, return air collection-release mechanism, primary filter plate, and part of the housing of the present invention.

[0026] Figure 5 This is a schematic diagram of the first magnetic block and the air outlet of the present invention.

[0027] Figure 6 For the present invention Figure 5 A schematic diagram after adding the second magnetic block.

[0028] Figure 7 This is a schematic diagram of the air humidification mechanism of the present invention.

[0029] Figure 8 This is a schematic diagram of the air heating mechanism of the present invention.

[0030] Figure 9 This is a schematic diagram of the aluminum honeycomb panel of the present invention.

[0031] Figure 10 This is a schematic diagram of the honeycomb holes in the present invention, which are lower on the left and higher on the right.

[0032] Figure 11 For the present invention Figure 4 A diagram showing the effect after adding the baffle.

[0033] In the diagram: 1-Fresh air duct, 2-Air handling unit, 3-Supply air duct, 4-Clean room, 5-Return air column, 6-Return air duct, 7-Box, 8-Primary filter plate, 9-Wind turbine generator set, 10-Air humidification unit, 11-Air heating unit, 12-Fan, 13-Medium efficiency filter, 14-Main supply air duct, 15-Supply air branch duct, 16-Air outlet, 17-Return air branch duct, 18-Main return air duct, 19-Return air collection-release mechanism, 20-Connecting pipe, 21-Air collection bag, 22-Air outlet, 23-First magnet, 24-Spring, 25-Through hole 26-Fixed section, 27-First telescopic section, 28-Second telescopic section, 29-First V-shaped section, 30-First tip, 31-Vertical centerline, 32-Second V-shaped section, 33-Second tip, 34-Second magnetic block, 35-Partition, 36-Water tank, 37-Vertical water outlet pipe, 38-Horizontal water outlet pipe, 39-Spray head, 40-Air vent, 41-Heating seat, 42-Aluminum honeycomb panel, 43-Honeycomb holes, 44-Nano silver antibacterial gel filter, 45-Photocatalytic filter, 46-Activated carbon filter, 47-Baffle plate, 48-Slide groove, 49-Slider. Detailed Implementation

[0034] The following will refer to the appendices in the embodiments of the present invention. Figure 1-10 The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] This invention provides a technical solution: a cleanroom air circulation device, including a fresh air duct 1, which is connected to an air handling unit 2. The upper right end of the air handling unit 2 is connected to a supply air duct 3, which is connected to a cleanroom 4. Return air columns 5 are provided on the left and right sides of the cleanroom 4, and a return air duct 6 is connected to the top of the return air columns 5. The return air duct 6 is connected to the air handling unit 2. The air handling unit 2 includes a housing 7, inside which, from left to right, are arranged a primary filter plate 8, a wind turbine generator 9, an air humidification unit 10, an air heating unit 11, a fan 12, and a medium-efficiency filter 13. During operation, the fan 12 starts, and outside fresh air enters the air handling unit 2 through the fresh air duct 1 for processing. The primary filter plate 8 mainly filters dust, pollen, particulate matter, and other particles in the air. The wind turbine generator 9 utilizes the air (wind) entering the air handling unit 2 for processing. The wind turbine generator 9 generates electricity, which is then used to power the air humidification unit 10 and the air heating unit 11 within the air handling unit 2. This effectively utilizes the wind energy present in the air handling unit 2 to power the air humidification unit 10 and the air heating unit 11, significantly saving energy and achieving excellent energy-saving results. The air humidification unit 10 humidifies the dry external air to a certain extent, and the air heating unit 11 heats the air to a certain extent. The air then undergoes further filtration through a medium-efficiency filter 13, which can be a bag-type medium-efficiency filter. The filtered air is then delivered to the cleanroom 4 via the air supply duct 3. The air inside the cleanroom 4 returns to the air handling unit 2 via the return air column 5 and the return air duct 6 to participate in air circulation. This cycle continues, providing clean air to the cleanroom 4. Figure 2 As shown, the return air column 5 is a hollow column formed by a baffle and the wall panel of the clean room 4. Several return air vents are provided below the baffle. An induced draft fan can be installed inside the return air column 5 or the return air duct 6 to improve the return air effect. The wind turbine generator set 9 is existing technology, so its structure and principle will not be described in detail here.

[0036] The air supply duct 3 includes a main air supply pipe 14 connected to the upper right end of the air handling unit 2. Several branch air supply pipes 15 are connected to the main air supply pipe 14. Air outlets 16 are connected to the branch air supply pipes 15. The air outlets 16 are fixed to the ceiling of the clean room 4 and are connected to the interior of the clean room 4. This is the specific structure of the air supply duct 3. The arrangement of the branch air supply pipes 15 enables uniform air supply to the interior of the clean room 4, resulting in better air supply effect.

[0037] The return air duct 6 includes a return air branch pipe 17 connected to the top of the return air column 5. The return air branch pipe 17 is connected to the return air main pipe 18. The return air main pipe 18 is connected to the upper left end of the box 7 and is connected to the interior of the box 7. This is the specific structure of the return air duct 6. The two return air columns 5 on the left and right are connected to the return air main pipe 18 through the return air branch pipe 17.

[0038] A return air collection-release mechanism 19 is provided between the primary filter plate 8 and the fresh air duct 3. The return air collection-release mechanism 19 includes a connecting pipe 20 connected to the return air main duct 18. An air collecting bag 21 is fixed to the right end of the connecting pipe 20. Two first magnetic blocks 23 are fixed to the air outlet 22 of the air collecting bag 21. The inner end of a spring 24 is fixed to the outer end of the first magnetic block 23. The outer end of the spring 24 is fixed to the inner wall of the housing 7. A through hole 25 is provided on the primary filter plate 8 at a position opposite to the first magnetic block 23. The working principle of the return air collection and release mechanism 19 is as follows: The return air in the return air main duct 18 enters the air collection bag 21 after passing through the connecting pipe 20. When there is not enough return air collected in the air collection bag 21, the upper and lower first magnetic blocks 23 press the air outlet 22 together due to the attraction between them, that is, seal the air outlet 22. In this way, the return air is prevented from participating in the air circulation for a certain period of time, allowing more fresh air from the outside to participate in the air circulation, thereby improving the overall air quality of the clean room. As return air continuously enters the air collecting bag 21, the amount of return air in the bag increases, causing it to inflate larger and larger. This inflation process also pulls the two first magnetic blocks 23 apart. When the bag inflates to a certain extent, the two first magnetic blocks 23 separate. Because the spring 24 itself exerts a certain pulling force on the first magnetic blocks 23, at the moment of separation, the first magnetic blocks 23 are quickly pulled outwards. When the air outlet 22 is opened instantly, the return air that was originally gathered in the air collection bag 21 is quickly released through the air outlet 22 and the through hole 25 to the wind turbine generator 9. The through hole 25 is directly opposite the wind turbine generator 9. The return air coming out of the air collection bag 21 is not only large in volume and concentrated, but also fast in speed, which greatly improves the power generation efficiency and effect of the wind turbine generator 9. This is because the fresh air is relatively dispersed after passing through the primary filter plate 8, which may result in a less than ideal power generation effect of the wind turbine generator 9. As the return air in the air collection bag 21 is continuously released, the air collection bag 21 will contract until the upper and lower first magnetic blocks 23 close the air outlet 22 again, and the next round of air collection process begins, and this cycle repeats. Because the spring 24 still has strong elasticity after being quickly pulled away from the first magnetic block 23, it will drive the first magnetic block 23 to move up and down, which also makes it easier for the upper and lower first magnetic blocks 23 to close the air outlet 22 again. The air collecting bag 21 can be made of rubber, which not only gives it strong elasticity but also improves the sealing of the air outlet 22, which is pressed between the two first magnetic blocks 23. The primary filter plate 8 has a groove 48, and the first magnetic block 23 has a slider 49 that matches the groove 48. This arrangement enables a sliding connection between the first magnetic block 23 and the primary filter plate 8, thus limiting the position of the first magnetic block 23. Figure 11 As shown, in order to better separate the upper and lower first magnetic blocks 23, a baffle plate 47 is fixed at the end of the first magnetic block 23 that is close to the spring 24. In this way, when the air collection bag 21 is filled, it will push the baffle plate 47 outward after contacting it, and then push the first magnetic block 23 fixed to the baffle plate 47 outward, thus facilitating the separation of the upper and lower first magnetic blocks 23.

[0039] The air outlet 22 includes a fixed section 26 that is fixed to the first magnet 23. A first telescopic section 27 and a second telescopic section 28 are provided between the upper and lower fixed sections 26. The first telescopic section 27 is formed by connecting a plurality of first V-shaped sections 29, wherein the first tip 30 of the first V-shaped section 29 faces inward and exceeds the vertical center line 31 of the first magnet 23. The second telescopic section 28 is formed by connecting a plurality of second V-shaped sections 32, wherein the second tip 33 of the second V-shaped section 32 faces inward and exceeds the vertical center line 31 of the first magnet 23. The second tip 33 is located below the first tip 30. The fixed section 26 is used for fixing to the first magnet 23. The arrangement of the first telescopic section 27 and the second telescopic section 28 facilitates the contraction and opening of the air outlet 22. The first tip 30 and the second tip 33 are both positioned beyond the vertical center line 31, and the second tip 33 is located below the first tip 30. In this way, when the first telescopic section 27 and the second telescopic section 28 are compressed, the first tip 30 and the second tip 33 will overlap alternately, which will achieve a good sealing effect.

[0040] The bottom two outer ends of the first magnetic block 23 are fixed with second magnetic blocks 34. The thickness of the second magnetic block 34 is slightly less than the sum of the thicknesses of the first telescopic section 27 and the second telescopic section 28 after compression. This arrangement can firmly press the first telescopic section 27 and the second telescopic section 28 between the upper and lower first magnetic blocks 23.

[0041] The air humidification mechanism 10 includes a partition 35. A water tank 36 is fixed to the bottom right side of the partition 35. A water pump is installed inside the water tank 36. A vertical water outlet pipe 37 is fixedly connected to the outlet of the water pump. Several horizontal water outlet pipes 38 are evenly distributed on the vertical water outlet pipe 37. Several spray heads 39 are installed on the horizontal water outlet pipes 38. Several air passage holes 40 are provided on the partition 35 between adjacent horizontal water outlet pipes 38. The principle of the air humidification mechanism 10 is as follows: the wind turbine generator 9 provides electrical energy to the water pump. When the water pump starts, it draws water from the water tank 36 to the vertical water outlet pipe 37. Water enters the horizontal water outlet pipe 38 through the vertical water outlet pipe 37, and water mist is sprayed out through the spray head 39 on the horizontal water outlet pipe 38. Air passes through the air passage hole 40 on the partition 35 and then through the water mist, effectively humidifying the air. The water mist that falls back into the water tank 36 to participate in the circulation. Because the partition 35 is designed to prevent the water mist from escaping to the left side of the partition 35, although the partition 35 is provided with air passage hole 40, the air is blown towards the water mist through the air passage hole 40, so the water mist can be prevented from entering the left side of the partition 35 through the air passage hole 40.

[0042] The air heating mechanism 11 includes a heating base 41 fixedly connected to a water tank 36. An aluminum honeycomb panel 42 is fixed on the heating base 41. The wind power generator 9 provides power to the heating base 41 and heats the aluminum honeycomb panel 42 through the heating base 41. The humidified air can be fully heated after passing through the aluminum honeycomb panel 42. Moreover, the method of humidifying the air first and then heating it can avoid the disadvantages of heating the air first and then humidifying it. In the background technology, the air is heated first and then humidified. In this method, the heated air loses a lot of heat after humidification. The method of humidifying first and then heating can retain heat well and remove moisture appropriately.

[0043] The aluminum honeycomb panel 42 has several honeycomb holes 43, which are arranged in a left-low, right-high angle. This angled arrangement effectively guides airflow and prevents water mist from escaping to the right side of the panel. To improve air heating, spiral plates can be fixed inside the honeycomb holes 43, allowing the air to pass through them for a longer time, thus enhancing the heating effect.

[0044] From left to right, a nano-silver antibacterial gel filter 44, a photocatalytic filter 45, and an activated carbon filter 46 are arranged between the wind turbine generator set 9 and the air humidification unit 10. The nano-silver antibacterial gel filter 44 can sterilize the air, the photocatalytic filter 45 can eliminate harmful substances such as formaldehyde and benzene, and the activated carbon filter 46 can deodorize the air. The air purification effect can be greatly improved by using the nano-silver antibacterial gel filter 44, the photocatalytic filter 45, and the activated carbon filter 46.

[0045] Working principle: During operation, the fan 12 starts, and fresh air from outside enters the air handling unit 2 through the fresh air duct 1 for processing. The primary filter 8 mainly filters dust, pollen, particulate matter, and other particles in the air. The wind turbine generator 9 uses the air (wind) entering the air handling unit 2 to generate electricity. The electrical energy generated and stored is used to power the air humidification unit 10 and the air heating unit 11 in the air handling unit 2. In this way, the wind turbine generator 9 makes good use of the wind energy present in the air handling unit 2 to power the air humidification unit 10 and the air heating unit 11 in the air handling unit 2. The air handling unit 2 (11) provides electrical energy, significantly saving energy and achieving excellent energy-saving effects. The air humidification unit 10 humidifies the dry external air to a certain extent, and the air heating unit 11 heats the air to a certain extent. The air then undergoes further filtration through a medium-efficiency filter 13, which can be a bag-type medium-efficiency filter. The air filtered by the medium-efficiency filter 13 is delivered to the cleanroom 4 via the air supply duct 3. The air inside the cleanroom 4 returns to the air handling unit 2 via the return air column 5 and return air duct 6 to participate in air circulation. This cycle repeats continuously, providing clean air to the cleanroom 4. The return air in the return air main duct 18 enters the air collection bag 21 through the connecting pipe 20. When the collected return air in the air collection bag 21 is insufficient, the upper and lower first magnetic blocks 23 attract each other, pressing the air outlet 22 together, effectively sealing the air outlet 22. This prevents return air from participating in air circulation for a certain period, allowing more fresh air from the outside to participate in air circulation, thereby improving the overall air quality of the cleanroom. As return air continuously enters the air collecting bag 21, the amount of return air in the bag increases, causing it to inflate larger and larger. This inflation process also pulls the two first magnetic blocks 23 apart. When the bag inflates to a certain extent, the two first magnetic blocks 23 separate. Because the spring 24 itself exerts a certain pulling force on the first magnetic blocks 23, at the moment of separation, the first magnetic blocks 23 are quickly pulled outwards. The air outlet 22 is opened instantly, allowing the return air that was originally gathered in the air collection bag 21 to quickly reach the wind turbine generator 9 through the air outlet 22 and the through hole 25. The through hole 25 is directly opposite the wind turbine generator 9. The return air coming out of the air collection bag 21 is not only large in volume and concentrated, but also fast in speed, which greatly improves the power generation efficiency and effect of the wind turbine generator 9. This is because the fresh air is relatively dispersed after passing through the primary filter plate 8, which may result in a less than ideal power generation effect of the wind turbine generator 9. As the return air in the air collection bag 21 is continuously released, the air collection bag 21 will contract until the upper and lower first magnetic blocks 23 close the air outlet 22 again, and the next round of air collection process begins, and this cycle repeats.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clean room air circulation apparatus, characterized by, The application relates to a clean room, which comprises a fresh air duct (1) connected with an air treatment mechanism (2), the upper right end of the air treatment mechanism (2) is connected with a supply air duct (3), the supply air duct (3) is connected with a clean room (4), the left and right sides of the clean room (4) are provided with return air columns (5), the top of the return air columns (5) is connected with a return air duct (6), the return air duct (6) is connected with the air treatment mechanism (2), the air treatment mechanism (2) comprises a box body (7), the inside of the box body (7) is sequentially provided with a primary filter plate (8), a wind turbine generator (9), an air humidifying mechanism (10), an air heating mechanism (11), a fan (12) and a medium filter (13) from left to right. The return air duct (6) comprises a return air branch pipe (17) connected with the top of the return air column (5), the return air branch pipe (17) is connected with a return air main pipe (18), the return air main pipe (18) is connected to the upper left end of the box body (7) and is connected with the inside of the box body (7). The primary filter plate (8) and the fresh air duct (3) are provided with a return air collecting-releasing mechanism (19), the return air collecting-releasing mechanism (19) comprises a communication pipe (20) connected with the return air main pipe (18), the right end of the communication pipe (20) is fixedly provided with a wind collecting bag (21), the air outlet part (22) of the wind collecting bag (21) is fixedly provided with two first magnetic blocks (23) arranged in an up-down mode, the outer end of the first magnetic block (23) is fixedly provided with the inner end of a spring (24), the outer end of the spring (24) is fixed to the inner wall of the box body (7), and a through hole (25) is formed in the position, which is opposite to the first magnetic block (23), of the primary filter plate (8). The end, which is close to the spring (24), of the first magnetic block (23) is fixedly provided with a blocking plate (47).

2. A clean room air circulation apparatus according to claim 1, wherein The supply air duct (3) comprises a supply air main pipe (14) connected with the upper right end of the air treatment mechanism (2), a plurality of supply air branch pipes (15) are connected with the supply air main pipe (14), and a supply air outlet (16) is connected with the supply air branch pipes (15) and is fixed to the top plate of the clean room (4) and connected with the inside of the clean room (4).

3. A clean room air circulation apparatus according to claim 1, wherein The air outlet part (22) comprises a fixed section (26) fixedly connected with the first magnetic block (23), a first telescopic section (27) and a second telescopic section (28) are arranged between the two fixed sections (26), the first telescopic section (27) is connected by a plurality of first V-shaped sections (29), the first pointed end part (30) of the first V-shaped section (29) faces the inside and exceeds the vertical center line (31) of the first magnetic block (23), the second telescopic section (28) is connected by a plurality of second V-shaped sections (32), the second pointed end part (33) of the second V-shaped section (32) faces the inside and exceeds the vertical center line (31) of the first magnetic block (23), and the second pointed end part (33) is located below the first pointed end part (30).

4. A clean room air circulation apparatus according to claim 3, wherein The bottom surface of the first magnetic block (23) is fixed with a second magnetic block (34) at both outer ends, and the thickness of the second magnetic block (34) is slightly smaller than the sum of the thicknesses of the first telescopic section (27) and the second telescopic section (28) after compression.

5. A clean room air circulation apparatus according to claim 1, wherein The air humidifying mechanism (10) comprises a partition (35), the right side bottom of the partition (35) is fixed with a water tank (36), the water tank (36) is provided with a water pump, the water outlet of the water pump is fixedly connected with a vertical water outlet pipe (37), the vertical water outlet pipe (37) is uniformly provided with a plurality of horizontal water outlet pipes (38), the horizontal water outlet pipes (38) are provided with a plurality of spray heads (39), and the partition (35) between adjacent horizontal water outlet pipes (38) is provided with a plurality of air passing holes (40).

6. A clean room air circulation apparatus according to claim 5, wherein The air heating mechanism (11) comprises a heating seat (41) fixedly connected with the water tank (36), and the heating seat (41) is fixed with an aluminum honeycomb plate (42).

7. A clean room air circulation apparatus according to claim 6, wherein The aluminum honeycomb plate (42) is provided with a plurality of honeycomb holes (43), and the honeycomb holes (43) are arranged in a left-low and right-high inclined manner.

8. A clean room air circulation apparatus according to claim 1, wherein The wind turbine generator (9) and the air humidifying mechanism (10) are sequentially provided with a nano-silver antibacterial gel filter screen (44), a photocatalyst filter screen (45) and an activated carbon filter screen (46) from left to right.

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