A clean room ventilation structure

Abstract

The present application discloses a clean room ventilation structure, which relates to the field of ventilation, including a ventilation duct, a filter screen is arranged in the ventilation duct, a filter screen bracket is arranged between the inner wall of the ventilation duct and the filter screen, the ventilation duct is slidably connected with the filter screen bracket, one end of the filter screen bracket passes through the ventilation duct, a handle is fixed on the filter screen bracket, a blocking mechanism is arranged on one side of the filter screen bracket, and a locking mechanism is arranged on the ventilation duct. When the filter screen bracket is pulled out of the ventilation duct, the filter screen bracket drives the blocking mechanism, and the blocking mechanism blocks the ventilation duct. When the filter screen bracket is completely pulled out, the locking mechanism fixes the filter screen bracket, and then the filter screen on the filter screen bracket is replaced, thereby reducing the external unfiltered air from entering the clean room during the replacement of the filter screen, and reducing the possibility of dust entering the clean room.

Description

Technical Field

[0001] The present application relates to the field of ventilation, and in particular to a clean room ventilation structure. Background Art

[0002] A clean room, also known as a dust-free workshop, clean room or clean room, refers to a closed room with strict requirements on air temperature, humidity, pressure, and especially dust concentration. It is suitable for the production of microelectronic products, precision machining, assembly of electronic components and certain electronic products, fine chemicals, and production of precision instruments. In order to ensure the normal use of the clean room, the ventilation structure of the clean room will be more complicated than the ordinary ventilation structure.

[0003] The existing Chinese patent (publication number: CN219222728U) mentions a clean room ventilation structure, including a fan, a ventilation pipe is installed on the front surface of the fan, a baffle is installed on the inner side wall of the ventilation pipe, a filter is installed on the front surface of the baffle, a positioning mechanism is installed between the filter and the ventilation pipe, the positioning mechanism includes a slide groove, a spring frame, a positioning block, a slide rod, a connecting rod, a cross bar and a connecting shaft, and slide rods are installed at both ends of the inner side wall of the ventilation pipe; the support wheel can be tightly attached to the filter under the cooperation of the slide groove, spring frame, positioning block, slide rod, connecting rod, cross bar and connecting shaft inside the positioning mechanism. When the waste filter needs to be replaced, the operating ring is pulled outward to make the support wheel detach from the filter, and then the filter can be pulled out. In this way, it is convenient for the staff to replace the filter, thereby increasing the functionality of the fan.

[0004] In actual operation, when the filter of the ventilation duct needs to be replaced, the filter will be removed and then replaced. During this process, outside air will also enter the ventilation duct. Without the obstruction of the filter in the ventilation duct, the air containing dust will directly float into the fan and may directly float into the clean room, destroying the clean environment in the clean room. Utility Model Content

[0005] The purpose of the present application is to solve the problem raised in the above-mentioned background technology that during the process of removing the filter and then replacing the filter, the outside air will also enter the ventilation duct, and the ventilation duct lacks the obstruction of the filter, and the air containing dust directly floats into the fan. The present application provides a clean room ventilation structure.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] A clean room ventilation structure comprises a ventilation duct, a filter screen is arranged in the ventilation duct, a filter screen holder is arranged between the inner wall of the ventilation duct and the filter screen, the filter screen is fixedly connected to the filter screen holder, the ventilation duct is slidably connected to the filter screen holder, one end of the filter screen holder passes through the ventilation duct, a handle is fixed on the filter screen holder, a blocking mechanism is arranged on one side of the filter screen holder, and a locking mechanism is arranged on the ventilation duct.

[0008] By adopting the above technical solution, when the filter holder is pulled out from the ventilation duct, the filter holder drives the blocking mechanism, and the blocking mechanism blocks the ventilation duct. When the filter holder is completely pulled out, the locking mechanism fixes the filter holder, and then the filter on the filter holder is replaced, thereby reducing the amount of unfiltered air from the outside entering the clean room during the filter replacement period and reducing the possibility of dust entering the clean room.

[0009] Furthermore, the sealing mechanism includes a sealing plate arranged on one side of the filter bracket, the sealing plate passes through the ventilation duct, the sealing plate is fixedly connected to the filter bracket, a storage box is fixed on the ventilation duct, the storage box corresponds to the sealing plate, a sealing strip 1 is fixed on both sides of the sealing plate, a groove corresponding to the sealing strip 1 is opened on the inner wall of the ventilation duct, a sealing strip 2 is fixed on one end of the sealing plate close to the filter bracket, and a groove corresponding to the sealing strip 2 is opened on the inner wall of the ventilation duct.

[0010] By adopting the above technical solution, when the filter bracket is pulled, the filter bracket drives the sealing plate, and the sealing plate slides out of the storage box under the pulling of the filter bracket, and the sealing strips 1 on both sides of the sealing plate enter the corresponding grooves in the ventilation duct, and the sealing strips 2 on the sealing plate contact the corresponding grooves in the ventilation duct, thereby reducing the possibility of unfiltered air from the outside entering the clean room when replacing the filter.

[0011] Furthermore, a blocking plate is fixed to one end of the blocking plate away from the second sealing strip, a third sealing strip is fixed to the blocking plate, and a groove corresponding to the third sealing strip is formed on the outer wall of the ventilation duct.

[0012] By adopting the above technical solution, when the blocking plate completely blocks the ventilation duct, the sealing strip on the blocking plate contacts the groove on the outer wall of the ventilation duct, thereby reducing the possibility of outside air entering the ventilation duct through the storage box during the movement of the blocking plate.

[0013] Furthermore, a plurality of return springs are arranged between the blocking plate and the storage box, and both ends of the return springs are fixedly connected to the storage box and the blocking plate.

[0014] By adopting the above technical solution, when the blocking plate is moved into the storage box, the blocking plate is acted upon by the reset spring and further quickly enters the storage box, thereby reducing the possibility that the blocking plate cannot be completely reset when sliding into the storage box.

[0015] Furthermore, the locking mechanism includes a locking block fixed on the ventilation duct, the locking block runs through the ventilation duct, and two symmetrical sliding blocks are slidably connected to the locking block. The locking block is provided with two symmetrical sliding grooves, and the sliding grooves correspond to the sliding blocks. A locking spring is arranged in the sliding groove, and both ends of the locking spring are fixedly connected to the locking block and the sliding block. The sliding block is provided with an inclined surface at one end away from the locking spring, and two snap-in grooves are provided on the locking block, and the snap-in groove is open at one end facing the ventilation duct, and the snap-in groove is communicated with the sliding groove, and a connecting plate is fixed on the filter bracket, and a snap-in oblique block is fixed on the connecting plate, and the snap-in oblique block corresponds to the sliding block.

[0016] By adopting the above technical solution, the filter bracket drives the connecting plate, the connecting plate drives the clamping bevel block, the clamping bevel block contacts the inclined surface of the sliding block, and the sliding block squeezes the locking spring. When the clamping bevel block passes the sliding block, the sliding block restricts the clamping bevel block under the action of the locking spring, so that the filter bracket can be fixed after being pulled out, which is convenient for replacing the filter on the filter bracket and reduces the possibility of the sealing plate falling due to gravity.

[0017] Furthermore, both ends of the locking block are slidably connected with a pulling rod, the pulling rod passes through the locking block, one end of the pulling rod is fixedly connected to the sliding block, one end of the pulling rod is rotatably connected to the pulling block, and a limit block corresponding to the pulling block is fixed on the ventilation duct.

[0018] By adopting the above technical solution, when the pulling block passes through the limit block, the pulling block is rotated, and under the action of the locking spring, the pulling block conflicts with the limit block, thereby conveniently releasing the restriction on the filter bracket and allowing the filter bracket and the sealing plate to fall back and reset.

[0019] Furthermore, a limiting groove is provided on a surface of the limiting block away from the locking block, an end of the limiting groove away from the ventilation duct is open, and the limiting groove corresponds to the pulling block.

[0020] By adopting the above technical solution, the pulling block is rotated to make the pulling block correspond to the limiting groove, so that the interference between the pulling block and the limiting block can be made more stable.

[0021] Furthermore, two symmetrical support tubes are fixed on the ventilation duct, a threaded rod is threadedly connected to the support tube, a collar is rotatably connected to the threaded rod, a resistance block is fixed on the collar, the resistance block is in a 7-shape, and the resistance block corresponds to the filter bracket.

[0022] By adopting the above technical solution, the threaded rod is twisted, so that the threaded rod brings the resistance block on the ring closer to the filter bracket and resists the filter bracket, so that the resistance block squeezes the filter bracket, thereby reducing the gap between the filter bracket and the ventilation duct after resetting and improving the stability of the filter bracket.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. In the present application, the handle is pulled to slide the handle with the filter holder out of the ventilation duct, and the filter holder moves with the sealing plate. The sealing plate slides out of the storage box under the pulling of the filter holder, and the sealing strips 1 on both sides of the sealing plate enter into the corresponding grooves in the ventilation duct. When the filter holder is completely pulled out, the sealing strip 2 on the sealing plate contacts the corresponding grooves in the ventilation duct, and the sealing strip 3 on the blocking plate contacts the grooves on the outer wall of the ventilation duct, thereby completing the sealing of the ventilation duct and achieving the purpose of reducing the possibility that unfiltered air from the outside enters the clean room directly during the replacement of the filter, thereby destroying the cleanliness of the clean room.

[0025] 2. In the present application, when the filter bracket slides out of the ventilation duct, the filter bracket drives the connecting plate, the connecting plate drives the engaging bevel block, the engaging bevel block moves to the position of the engaging groove, and then the engaging bevel block contacts the inclined surface of the sliding block, allowing the sliding block to squeeze the locking spring. When the engaging bevel block passes the sliding block, the sliding block restricts the engaging bevel block under the action of the locking spring, and the engaging bevel block restricts the connecting plate, so that the filter bracket cannot move, thereby achieving the purpose of fixing the filter bracket after being pulled out, facilitating replacement of the filter on the filter bracket, and reducing the possibility of the sealing plate falling due to gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a first three-dimensional structural schematic diagram of the ventilation structure in this application;

[0027] Figure 2 is a first internal structure schematic diagram of the ventilation structure in the present application;

[0028] Figure 3 is a second internal structure schematic diagram of the ventilation structure in the present application;

[0029] Figure 4 This application Figure 1 Enlarged schematic diagram at point A in the middle.

[0030] Description of reference numerals:

[0031] 1. Ventilation duct; 2. Filter; 3. Filter bracket; 4. Handle; 5. Sealing mechanism; 51. Sealing plate; 52. Storage box; 53. Sealing strip 1; 54. Sealing strip 2; 55. Blocking plate; 56. Sealing strip 3; 57. Reset spring; 6. Locking mechanism; 61. Locking block; 62. Sliding groove; 63. Sliding block; 64. Snap-in groove; 65. Snap-in oblique block; 66. Connecting plate; 67. Locking spring; 7. Pull rod; 8. Pull block; 9. Limit block; 10. Limit groove; 11. Support tube; 12. Threaded rod; 13. Ring; 14. Resistance block. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 —4 Provide further details of this application.

[0033] An embodiment of the present application discloses a clean room ventilation structure.

[0034] Reference Figure 1 , Figure 2 and Figure 3 A clean room ventilation structure comprises a ventilation duct 1, a filter screen 2 is arranged in the ventilation duct 1, a filter screen bracket 3 is arranged between the inner wall of the ventilation duct 1 and the filter screen 2, the filter screen 2 is fixedly connected to the filter screen bracket 3, the ventilation duct 1 is slidably connected to the filter screen bracket 3, one end of the filter screen bracket 3 passes through the ventilation duct 1, a handle 4 is fixed on the filter screen bracket 3, a blocking mechanism 5 is arranged on one side of the filter screen bracket 3 passing through the ventilation duct 1, and a locking mechanism 6 is arranged on the top of the ventilation duct 1.

[0035] When it is necessary to replace the filter in the ventilation duct 1, first pull the handle 4, use the handle 4 to pull the filter bracket 3 out of the ventilation duct 1, the filter bracket 3 brings the filter 2 out of the ventilation duct 1, when the filter bracket 3 is pulled out of the ventilation duct 1, the filter bracket 3 drives the blocking mechanism 5, the blocking mechanism 5 blocks the ventilation duct 1, when the filter bracket 3 is completely pulled out, the locking mechanism 6 fixes the filter bracket 3, and then the filter 2 on the filter bracket 3 is replaced, after the filter 2 is replaced, the locking mechanism 6 releases the fixation of the filter bracket 3, and then the blocking mechanism 5 returns to its original position under the action of gravity, the filter bracket 3 returns to its original position with the filter 2, and when the filter bracket 3 is pulled out, the blocking mechanism 5 can block the ventilation duct 1, thereby reducing the external unfiltered air from entering the clean room during the filter replacement period, and reducing the possibility of dust entering the clean room.

[0036] Reference Figure 1 and Figure 2The sealing mechanism 5 includes a sealing plate 51 arranged on one side of the filter bracket 3, the sealing plate 51 penetrates the ventilation duct 1, the sealing plate 51 is fixedly connected to the filter bracket 3, a storage box 52 is fixed on the ventilation duct 1, the storage box 52 corresponds to the sealing plate 51, sealing strips 53 are fixed on both sides of the sealing plate 51, a groove corresponding to the sealing strips 53 is opened on the inner wall of the ventilation duct 1, a sealing strip 2 54 is fixed on one end of the sealing plate 51 close to the filter bracket 3, and a groove corresponding to the sealing strips 54 is opened on the inner wall of the ventilation duct 1.

[0037] When the filter screen holder 3 is pulled, the filter screen holder 3 slides in the ventilation duct 1, and the filter screen holder 3 drives the blocking plate 51. The blocking plate 51 slides out of the storage box 52 under the pulling of the filter screen holder 3, and the sealing strips 1 53 on both sides of the blocking plate 51 enter the corresponding grooves in the ventilation duct 1. When the filter screen holder 3 is completely pulled out, the sealing strips 2 54 on the blocking plate 51 abut against the corresponding grooves in the ventilation duct 1, and the locking mechanism 6 fixes the filter screen holder 3, and the blocking plate 51 completes the blocking of the ventilation duct 1. After the filter screen 2 is replaced, the locking mechanism 6 is released from the fixing of the filter screen holder 3, and the blocking plate 51 falls back into the storage box 52 under the influence of gravity. By pulling the filter screen holder 3 to pull out the filter screen 2 to replace the filter screen, the filter screen holder 3 can drive the blocking plate 51 to block the ventilation duct 1, thereby reducing the possibility of unfiltered air from the outside entering the clean room when the filter screen is replaced.

[0038] Reference Figure 1 and Figure 2 A blocking plate 55 is fixed to one end of the blocking plate 51 away from the second sealing strip 54 , a third sealing strip 56 is fixed to the blocking plate 55 , and a groove corresponding to the third sealing strip 56 is opened on the outer wall of the ventilation duct 1 .

[0039] When the blocking plate 51 is moving, the blocking plate 55 is moved with it. When the blocking plate 51 completely blocks the ventilation duct 1, the sealing strip 3 56 on the blocking plate 55 contacts the groove on the outer wall of the ventilation duct 1. By allowing the blocking plate 55 to be driven by the blocking plate 55 when moving, and the blocking plate 55 to drive the sealing strip 3 56, the possibility of outside air entering the ventilation duct 1 through the storage box 52 when the blocking plate 51 is moving can be reduced.

[0040] Reference Figure 1 and Figure 2 A plurality of return springs 57 are provided between the blocking plate 55 and the storage box 52 , and both ends of the return spring 57 are fixedly connected to the storage box 52 and the blocking plate 55 .

[0041] When the blocking plate 51 is pulled to move in the storage box 52, the blocking plate 51 pulls the return spring 57. When the blocking plate 51 is restricted by the filter bracket 3 and blocks the ventilation duct 1, the return spring 57 is in a pulling state. When the blocking plate 51 is moved into the storage box 52, the blocking plate 51 is acted upon by the return spring 57 and further quickly enters the storage box 52. By utilizing the return spring 57 to restrict the blocking plate 51, the possibility of the blocking plate 51 not being completely reset when sliding into the storage box 52 can be reduced.

[0042] Reference Figure 1 and Figure 3 The locking mechanism 6 includes a locking block 61 fixed on the ventilation duct 1, the locking block 61 runs through the ventilation duct 1, and two symmetrical sliding blocks 63 are slidably connected to the locking block 61. The locking block 61 is provided with two symmetrical sliding grooves 62, and the sliding grooves 62 correspond to the sliding blocks 63. A locking spring 67 is arranged in the sliding groove 62, and both ends of the locking spring 67 are fixedly connected to the locking block 61 and the sliding block 63. The sliding block 63 has an inclined surface at one end away from the locking spring 67. The locking block 61 is provided with two clamping grooves 64, and the clamping groove 64 is open at one end facing the ventilation duct 1, and the clamping groove 64 is connected to the sliding groove 62. A connecting plate 66 is fixed on the filter bracket 3, and a clamping oblique block 65 is fixed on the connecting plate 66, and the clamping oblique block 65 corresponds to the sliding block 63.

[0043] When the filter bracket 3 slides out of the ventilation duct 1, the filter bracket 3 drives the connecting plate 66, and the connecting plate 66 drives the clamping bevel 65, and the clamping bevel 65 moves to the position of the clamping groove 64, and then the clamping bevel 65 resists the inclined surface of the sliding block 63, allowing the sliding block 63 to squeeze the locking spring 67. When the clamping bevel 65 passes the sliding block 63, the sliding block 63 restricts the clamping bevel 65 under the action of the locking spring 67, and the clamping bevel 65 restricts the connecting plate 66, so that the filter bracket 3 cannot move. By utilizing the sliding block 63 to restrict the clamping bevel 65 on the filter bracket 3, the filter bracket 3 can be fixed after being pulled out, which is convenient for replacing the filter 2 on the filter bracket 3, while reducing the possibility of the blocking plate 51 falling due to gravity.

[0044] Reference Figure 1 , Figure 3 and Figure 4 Both ends of the locking block 61 are slidably connected with a pull rod 7, the pull rod 7 passes through the locking block 61, one end of the pull rod 7 is fixedly connected to the sliding block 63, one end of the pull rod 7 is rotatably connected to the pull block 8, and a limit block 9 corresponding to the pull block 8 is fixed on the ventilation duct 1.

[0045] When it is necessary to release the restriction of the sliding block 63 on the card-connecting bevel block 65, first pull the corresponding pulling block 8 to move the pulling block 8 with the pulling rod 7. When the pulling block 8 passes the limiting block 9, rotate the pulling block 8. Under the action of the locking spring 67, the pulling block 8 conflicts with the limiting block 9, allowing the sliding block 63 to disengage from the card-connecting bevel block 65. Then, the sealing plate 51 is affected by the reset spring 57 and gravity and returns to the storage box 52. By using the pulling rod 7 to pull the sliding block 63, and then pulling the block 8 and the limiting block 9 to restrict the sliding block 63, it is convenient to release the restriction on the filter bracket 3, and facilitate the filter bracket 3 and the sealing plate 51 to fall back and reset.

[0046] Reference Figure 1 and Figure 4 A limiting groove 10 is provided on a surface of the limiting block 9 away from the locking block 61 , and an end of the limiting groove 10 away from the ventilation duct 1 is open, and the limiting groove 10 corresponds to the pulling block 8 .

[0047] When the pulling block 8 moves to the position of the limit block 9, the pulling block 8 is rotated to make the pulling block 8 correspond to the limit slot 10, and then under the action of the reset spring 57, the pulling block 8 enters the limit slot 10. By utilizing the limitation of the limit slot 10 on the pulling block 8, the interference between the pulling block 8 and the limit block 9 can be made more stable.

[0048] Reference Figure 1 and Figure 4 Two symmetrical support tubes 11 are fixed on the ventilation duct 1, a threaded rod 12 is threadedly connected to the support tube 11, a collar 13 is rotatably connected to the threaded rod 12, a resistance block 14 is fixed on the collar 13, and the resistance block 14 is in a 7-shape, corresponding to the filter bracket 3.

[0049] When the filter on the filter holder 3 is replaced and the filter holder 3 is returned, the resistance block 14 on the threaded rod 12 is rotated so that the resistance block 14 is located above the filter holder 3, and then the threaded rod 12 is twisted to allow the threaded rod 12 to bring the resistance block 14 on the collar 13 closer to the filter holder 3 and resist the filter holder 3, so that the resistance block 14 squeezes the filter holder 3. By utilizing the resistance block 14 to restrict the filter holder 3, the gap between the filter holder 3 and the ventilation duct 1 after resetting can be reduced, and the stability of the filter holder 3 can be improved.

[0050] Working principle: when the filter 2 in the ventilation duct 1 needs to be replaced, first rotate the threaded rod 12 to make the resistance block 14 on the collar 13 away from the filter bracket 3, then move the collar 13 to make the collar 13 away from the top of the filter bracket 3 with resistance, then pull the handle 4 to make the handle 4 slide the filter bracket 3 out of the ventilation duct 1, and at the same time, the filter bracket 3 moves with the blocking plate 51, and the blocking plate 51 slides out of the storage box 52 under the pull of the filter bracket 3, and the sealing strips 53 on both sides of the blocking plate 51 enter the corresponding grooves in the ventilation duct 1;

[0051] When the filter bracket 3 is fully pulled out, the second sealing strip 54 on the blocking plate 51 contacts the corresponding groove in the ventilation duct 1, and the third sealing strip 56 on the blocking plate 55 contacts the groove on the outer wall of the ventilation duct 1. At the same time, the filter bracket 3 drives the connecting plate 66, and the connecting plate 66 drives the clamping bevel block 65, and the clamping bevel block 65 moves to the position of the clamping groove 64, and then the clamping bevel block 65 contacts the inclined surface of the sliding block 63, so that the sliding block 63 squeezes the locking spring 67;

[0052] At the same time, when the engaging bevel block 65 passes the sliding block 63, the sliding block 63 restricts the engaging bevel block 65 under the action of the locking spring 67, and the engaging bevel block 65 restricts the connecting plate 66, so that the filter bracket 3 will not fall, and then the filter 2 on the filter bracket 3 is replaced. After the replacement is completed, the corresponding pulling block 8 is pulled to move the pulling block 8 with the pulling rod 7. When the pulling block 8 passes the limiting block 9, the pulling block 8 is rotated, and the pulling block 8 and the locking spring 67 are engaged. The limit block 9 contacts with each other, allowing the sliding block 63 to disengage from the engaging inclined block 65, and then the blocking plate 51 returns to the storage box 52 under the action of gravity and the return spring 57, and the filter bracket 3 also enters the ventilation duct 1 at the same time, and finally the resistance block 14 is located above the filter bracket 3, and then the threaded rod 12 is screwed, so that the threaded rod 12 brings the resistance block 14 on the collar 13 closer to the filter bracket 3 and contacts the filter bracket 3, so that the resistance block 14 squeezes the filter bracket 3 to fix the filter bracket 3.

Claims

1. A clean room ventilation structure, comprising a ventilation duct (1), characterized in that: A filter screen (2) is arranged in the ventilation duct (1); a filter screen bracket (3) is arranged between the inner wall of the ventilation duct (1) and the filter screen (2); the filter screen (2) is fixedly connected to the filter screen bracket (3); the ventilation duct (1) is slidably connected to the filter screen bracket (3); one end of the filter screen bracket (3) passes through the ventilation duct (1); a handle (4) is fixed on the filter screen bracket (3); a blocking mechanism (5) is arranged on one side of the filter screen bracket (3); and a locking mechanism (6) is arranged on the ventilation duct (1).

2. A clean room ventilation structure according to claim 1, characterized in that: The blocking mechanism (5) comprises a blocking plate (51) arranged on one side of the filter support (3), the blocking plate (51) passing through the ventilation duct (1), the blocking plate (51) being fixedly connected to the filter support (3), a storage box (52) being fixed on the ventilation duct (1), the storage box (52) corresponding to the blocking plate (51), a sealing strip (53) being fixed on both sides of the blocking plate (51), a groove corresponding to the sealing strip (53) being provided on the inner wall of the ventilation duct (1), a sealing strip (54) being fixed on one end of the blocking plate (51) close to the filter support (3), and a groove corresponding to the sealing strip (54) being provided on the inner wall of the ventilation duct (1).

3. A clean room ventilation structure according to claim 2, characterized in that: A blocking plate (55) is fixed to one end of the blocking plate (51) away from the second sealing strip (54), a third sealing strip (56) is fixed to the blocking plate (55), and a groove corresponding to the third sealing strip (56) is provided on the outer wall of the ventilation duct (1).

4. A clean room ventilation structure according to claim 3, characterized in that: A plurality of return springs (57) are provided between the blocking plate (55) and the storage box (52), and both ends of the return spring (57) are fixedly connected to the storage box (52) and the blocking plate (55).

5. A clean room ventilation structure according to claim 2, characterized in that: The locking mechanism (6) comprises a locking block (61) fixed on the ventilation duct (1), the locking block (61) passing through the ventilation duct (1), two symmetrical sliding blocks (63) slidably connected to the locking block (61), two symmetrical sliding grooves (62) are provided on the locking block (61), the sliding grooves (62) correspond to the sliding blocks (63), a locking spring (67) is arranged in the sliding groove (62), two ends of the locking spring (67) are connected to the locking block (61) and the sliding block ( The sliding block (63) is fixedly connected, one end of the sliding block (63) away from the locking spring (67) is provided with an inclined surface, the locking block (61) is provided with two snap-fitting grooves (64), one end of the snap-fitting groove (64) facing the ventilation duct (1) is open, the snap-fitting groove (64) is communicated with the sliding groove (62), a connecting plate (66) is fixed on the filter bracket (3), a snap-fitting inclined block (65) is fixed on the connecting plate (66), and the snap-fitting inclined block (65) corresponds to the sliding block (63).

6. A clean room ventilation structure according to claim 5, characterized in that: Both ends of the locking block (61) are slidably connected to a pulling rod (7), the pulling rod (7) passes through the locking block (61), one end of the pulling rod (7) is fixedly connected to the sliding block (63), one end of the pulling rod (7) is rotatably connected to the pulling block (8), and a limiting block (9) corresponding to the pulling block (8) is fixed on the ventilation duct (1).

7. A clean room ventilation structure according to claim 6, characterized in that: A limiting groove (10) is provided on a surface of the limiting block (9) away from the locking block (61); an end of the limiting groove (10) away from the ventilation duct (1) is open; and the limiting groove (10) corresponds to the pulling block (8).

8. A clean room ventilation structure according to claim 1, characterized in that: Two symmetrical support tubes (11) are fixed on the ventilation duct (1), a threaded rod (12) is threadedly connected to the support tube (11), a collar (13) is rotatably connected to the threaded rod (12), a resistance block (14) is fixed to the collar (13), the resistance block (14) is in the shape of a figure 7, and the resistance block (14) corresponds to the filter support (3).

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