A clean room return air inlet structure capable of filtering

Abstract

The present invention discloses a clean room return air vent structure capable of filtering, which relates to the field of clean room technology. The clean room return air vent structure capable of filtering air during use, through the cooperation of a sealing frame and an annular limiting frame, can filter air through a filter plate within the sealing frame. When the filter plate reaches the end of its service life, the drive shaft can drive the base frame and the filter plate to rotate within the annular limiting frame, completing the automatic replacement of the filter plate. Compared with traditional filtering equipment, this structure can ensure the filtering effect and further improve the maintenance convenience of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of clean rooms, in particular to a clean room return air inlet structure capable of filtering. Background Art

[0002] A clean room refers to a well-sealed space where parameters such as air cleanliness, temperature, humidity, pressure, and noise are controlled as required. Referring to the Chinese patent "A Clean Room Structure and Clean Room Purification System" with the publication number "CN113654156B", it is pointed out that the dust in the clean room is basically concentrated at the return air position, causing the dust in some areas of the clean room to exceed the standard value, which is not conducive to the cleanliness of the clean room. However, the equipment still has the problem of inconvenient maintenance of dust removal by filter. To this end, we propose a clean room return air inlet structure that can be filtered to solve the above problem. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a clean room return air vent structure capable of filtering, which solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a clean room return air vent structure capable of filtering, comprising a return air vent body, a side of which is provided with an exhaust notch for discharging filtered air into the clean room;

[0005] A sealing frame is fixedly installed on the top of the return air vent body, and a filter plate is slidably connected inside the sealing frame. Voice coil motors are fixedly installed around the bottom of the sealing frame. The output ends of the voice coil motors are connected to the bottom support plate, which is used to support the filter plate.

[0006] The return air vent body is rotatably connected to a drive shaft, a plurality of limit rods are fixed to the outside of the drive shaft, an outer rod is slidably sleeved on the outside of the limit rod, a support spring is fixed between the end of the drive shaft and the corresponding outer rod, and the ends of the two corresponding outer rods are fixedly connected to a base frame, and the filter plate is fixedly mounted on the outside of the base frame for driving the base frame and the filter plate to rotate inside the return air vent body through the rotation of the drive shaft, thereby completing the replacement operation of the filter plate inside the sealing frame;

[0007] An annular limit frame is fixedly installed inside the return air outlet body, the annular limit frame is coaxial with the drive shaft, and a plurality of arc-shaped slots are opened inside the annular limit frame, the arc-shaped slots and the filter plate are linearly adapted to each other, and an arc-shaped limit plate is fixedly installed on the outside of the annular limit frame, which is used to allow the filter plate to enter the annular limit frame through the arc-shaped slot along the arc-shaped limit plate when it rotates, and an arc-shaped blocking rod is fixedly installed inside the corresponding arc-shaped slots to block the filter plate.

[0008] Preferably, a plurality of limiting blocks are rotatably connected to the interior of the annular limiting frame, and the limiting blocks are used to separate the corresponding filter plates.

[0009] Preferably, a drive motor is fixedly installed on the outside of the return air outlet body, the end of the drive shaft passes through the return air outlet body, and a coupling is provided between the output end of the drive motor and the end of the drive shaft to drive the drive shaft to operate inside the return air outlet body.

[0010] Preferably, pressure monitors are fixedly mounted on the ends of the plurality of bottom support plates, and the pressure monitors are fitted to the base frame for monitoring the filtering effect of the filter plates.

[0011] Preferably, sealing sheets are fixedly installed between both ends of the annular limiting frame and the interior of the return air outlet body.

[0012] Preferably, a cleaning assembly is provided inside the return air vent body for cleaning the filter plate after use, and the cleaning assembly includes a cleaning rack, which is rotatably connected to the inside of the return air vent body, and a plurality of cleaning tubes are rotatably connected to the inside of the cleaning rack, and the ends of the plurality of cleaning tubes are fixedly installed with cleaning heads, and the inside of the cleaning heads are fixedly installed with a plurality of flushing nozzles, which are used to flush cleaning water toward the filter plate to achieve cleaning treatment.

[0013] Preferably, a transmission belt is rotatably connected between the plurality of cleaning tubes to drive the plurality of cleaning tubes to rotate, thereby achieving flushing of the filter plate.

[0014] Preferably, the outer side of the cleaning rack is rotatably connected to a limit shaft, the limit shaft is rotatably connected to the return air outlet body, an adjusting cylinder is fixedly installed inside the return air outlet body, and the piston end of the adjusting cylinder is rotatably connected to the cleaning rack for adjusting the inclination angle of the cleaning rack.

[0015] Preferably, a collecting plate rack is fixedly installed on the inner bottom of the return air vent body, and the collecting plate rack is used to collect the flushed impurities.

[0016] Preferably, a drying module is fixedly installed inside the return air vent body, and the drying module is used to dry the filter plate after washing. A one-way exhaust valve is fixedly installed inside the return air vent body.

[0017] The present invention provides a clean room return air vent structure capable of filtering. Compared with the prior art, it has the following advantages:

[0018] (1) The clean room return air inlet structure capable of filtering, through the cooperation of the sealing frame and the annular limit frame, can filter the air through the filter plate inside the sealing frame during use, and when the filter plate reaches the end of its service life, the driving shaft can drive the base frame and the filter plate to rotate inside the annular limit frame to complete the automatic replacement of the filter plate. Compared with traditional filtering equipment, it can ensure the filtering effect and further improve the convenience of equipment maintenance.

[0019] (2) The clean room return air inlet structure capable of filtering, through the setting of the cleaning component, when the used filter plate rotates with the base frame to the inside of the annular limit frame, the filter plate can be blocked by the cooperation of the arc-shaped blocking rod, and the cleaning water can be sprayed through multiple cleaning ends and flushing nozzles to complete the automatic flushing of the filter plate, and then the filter plate can be dried through the drying module, further improving the convenience of use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the return air outlet body of the present invention;

[0022] Figure 3 For the present invention Figure 2 Side view structural diagram;

[0023] Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0024] Figure 5 This is a schematic cross-sectional structural diagram of the sealing frame of the present invention;

[0025] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0026] Figure 7 This is a schematic structural diagram of the annular limiting frame of the present invention;

[0027] Figure 8 This is a schematic diagram of the cross-sectional structure of the filter plate of the present invention;

[0028] Figure 9 This is a schematic structural diagram of the cleaning rack of the present invention;

[0029] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C in the middle.

[0030] In the figure: 1. Return air vent body; 101. Exhaust notch; 102. Drive motor; 2. Sealing frame; 3. Filter plate; 4. Annular limit frame; 401. Arc notch; 4011. Arc stop rod; 402. Limit block plate; 403. Arc limit plate; 5. Drive shaft; 501. Limit rod; 6. Outer rod; 601. Support spring; 7. Base frame; 8. Cleaning frame; 801. Limit shaft; 802. Adjustment cylinder; 9. Cleaning pipe; 901. Cleaning end; 9011. Flushing nozzle; 902. Transmission belt; 10. Collection plate frame; 11. Drying module; 12. One-way exhaust valve; 13. Voice coil motor; 1301. Bottom support plate. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1-10 The present invention provides two technical solutions, specifically including the following embodiments:

[0033] Example 1:

[0034] In an embodiment of the present invention, a clean room return air vent structure capable of filtering includes a return air vent body 1, and an exhaust slot 101 is opened on the side of the return air vent body 1 for discharging filtered air into the clean room;

[0035] Specifically, the return air vent body 1 is first assembled into the clean room. As the negative pressure equipment in the clean room operates, the external air can enter the return air vent body 1 and then enter the clean room through the exhaust slot 101.

[0036] A sealing frame 2 is fixedly mounted on the top of the return air vent body 1, and a filter plate 3 is slidably connected to the inside of the sealing frame 2. Voice coil motors 13 are fixedly mounted on all four sides of the bottom of the sealing frame 2. The output ends of the voice coil motors 13 are connected to bottom support plates 1301, which are used to support the filter plate 3.

[0037] The return air vent body 1 is rotatably connected to a drive shaft 5, and a plurality of limit rods 501 are fixed to the outside of the drive shaft 5. An outer rod 6 is slidably sleeved on the outer side of the limit rod 501. A support spring 601 is fixed between the end of the drive shaft 5 and the corresponding outer rod 6. The ends of the two corresponding outer rods 6 are fixedly connected to a base frame 7. The filter plate 3 is fixedly mounted on the outside of the base frame 7, and is used to drive the base frame 7 and the filter plate 3 to rotate inside the return air vent body 1 through the rotation of the drive shaft 5, thereby completing the replacement operation of the filter plate 3 inside the sealing frame 2.

[0038] Specifically, there are multiple filter plates 3, and the filter plates 3 located inside the sealing frame 2 are in use, so that the external air can pass through the filter plates 3 inside the sealing frame 2 to be filtered, and then enter the return air vent body 1 and be discharged to the clean room through the exhaust slot 101;

[0039] The filter plate 3 can be supported by the bottom support plates 1301 at the ends of the multiple voice coil motors 13. Specifically, the bottom support plates 1301 are installed at an angle. The initial positions of the filter plate 3 and the base frame 7 are located below the sealing frame 2. The filter plate 3 and the bottom of the sealing frame 2 remain flush. At this time, the voice coil motor 13 drives the bottom support plates 1301 to extend, and the filter plate 3 and the base frame 7 can be pressed into the sealing frame 2. When the filter plate 3 is replaced, as the voice coil motor 13 drives the bottom support plates 1301 to reset, the filter plate 3 and the base frame 7 can be separated from the sealing frame 2. Then, the driving shaft 5 is rotated, and the base frame 7 and the filter plate 3 can be driven to rotate through the cooperation of the limit rod 501 and the outer rod 6, thereby realizing automatic replacement of the filter plate 3.

[0040] Specifically, when the voice coil motor 13 drives the bottom support plate 1301 to extend and press the filter plate 3 and the base frame 7 into the sealing frame 2, the limiting rod 501 and the corresponding outer rod 6 extend, and the support spring 601 stretches until the voice coil motor 13 drives the bottom support plate 1301 to return to its original position. The filter plate 3 and the base frame 7 can then be separated from the sealing frame 2 by the return force of the support spring 601.

[0041] An annular limiting frame 4 is fixedly installed inside the return air vent body 1. The annular limiting frame 4 is coaxial with the drive shaft 5, and a plurality of arc-shaped notches 401 are opened inside the annular limiting frame 4. The arc-shaped notches 401 are linearly adapted to the filter plates 3, and an arc-shaped limiting piece 403 is fixedly installed on the outside of the annular limiting frame 4. When the filter plates 3 rotate, they can enter the annular limiting frame 4 through the arc-shaped notches 401 along the arc-shaped limiting piece 403. The corresponding arc-shaped notches 401 are fixedly installed with arc-shaped blocking rods 4011 to block the filter plates 3.

[0042] Specifically, when the driving shaft 5 drives the base frame 7 and the filter plate 3 to rotate, the filter plate 3 separated from the sealing frame 2 can contact the arc-shaped limiting piece 403 and enter the interior of the annular limiting frame 4 through the cooperation of the arc-shaped limiting piece 403. The filter plate 3 entering the interior of the annular limiting frame 4 can be blocked by the arc-shaped blocking rod 4011 until the filter plate 3 rotates to the bottom of the sealing frame 2 and can be ejected through the arc-shaped notch 401.

[0043] The annular limiting frame 4 is internally rotatably connected with a plurality of limiting blocks 402, which are used to separate the corresponding filter plates 3;

[0044] A drive motor 102 is fixedly mounted on the outside of the return air vent body 1. The end of the drive shaft 5 passes through the return air vent body 1. A coupling is provided between the output end of the drive motor 102 and the end of the drive shaft 5 to drive the drive shaft 5 to run inside the return air vent body 1.

[0045] The ends of the multiple bottom support plates 1301 are fixedly mounted with pressure monitors, which are attached to the base frame 7 and are used to monitor the filtering effect of the filter plates 3;

[0046] The pressure monitor is an existing device and will not be described in detail here;

[0047] By setting up a pressure monitor, as the filter plate 3 is used for a longer time, the impurities adhering to its outer surface increase, causing the pressure value monitored by the pressure monitor to increase. The maintenance personnel can judge the use of the filter plate 3 by the pressure value and complete the timely replacement of the filter plate 3.

[0048] Sealing sheets are fixedly installed between both ends of the annular limiting frame 4 and the interior of the return air vent body 1 .

[0049] Example 2: Based on Example 1, a clean room return air vent structure capable of filtering includes a return air vent body 1, and an exhaust slot 101 is opened on the side of the return air vent body 1 for discharging filtered air into the clean room;

[0050] Specifically, the return air vent body 1 is first assembled into the clean room. As the negative pressure equipment in the clean room operates, the external air can enter the return air vent body 1 and then enter the clean room through the exhaust slot 101.

[0051] A sealing frame 2 is fixedly mounted on the top of the return air vent body 1, and a filter plate 3 is slidably connected to the inside of the sealing frame 2. Voice coil motors 13 are fixedly mounted on all four sides of the bottom of the sealing frame 2. The output ends of the voice coil motors 13 are connected to bottom support plates 1301, which are used to support the filter plate 3.

[0052] The return air vent body 1 is rotatably connected to a drive shaft 5, and a plurality of limit rods 501 are fixed to the outside of the drive shaft 5. An outer rod 6 is slidably sleeved on the outer side of the limit rod 501. A support spring 601 is fixed between the end of the drive shaft 5 and the corresponding outer rod 6. The ends of the two corresponding outer rods 6 are fixedly connected to a base frame 7. The filter plate 3 is fixedly mounted on the outside of the base frame 7, and is used to drive the base frame 7 and the filter plate 3 to rotate inside the return air vent body 1 through the rotation of the drive shaft 5, thereby completing the replacement operation of the filter plate 3 inside the sealing frame 2.

[0053] Specifically, there are multiple filter plates 3, and the filter plates 3 located inside the sealing frame 2 are in use, so that the external air can pass through the filter plates 3 inside the sealing frame 2 to be filtered, and then enter the return air vent body 1 and be discharged to the clean room through the exhaust slot 101;

[0054] The filter plate 3 can be supported by the bottom support plates 1301 at the ends of the multiple voice coil motors 13. Specifically, the bottom support plates 1301 are installed at an angle. The initial positions of the filter plate 3 and the base frame 7 are located below the sealing frame 2. The filter plate 3 and the bottom of the sealing frame 2 remain flush. At this time, the voice coil motor 13 drives the bottom support plates 1301 to extend, and the filter plate 3 and the base frame 7 can be pressed into the sealing frame 2. When the filter plate 3 is replaced, as the voice coil motor 13 drives the bottom support plates 1301 to reset, the filter plate 3 and the base frame 7 can be separated from the sealing frame 2. Then, the driving shaft 5 is rotated, and the base frame 7 and the filter plate 3 can be driven to rotate through the cooperation of the limit rod 501 and the outer rod 6, thereby realizing automatic replacement of the filter plate 3.

[0055] Specifically, when the voice coil motor 13 drives the bottom support plate 1301 to extend and press the filter plate 3 and the base frame 7 into the sealing frame 2, the limiting rod 501 and the corresponding outer rod 6 extend, and the support spring 601 stretches until the voice coil motor 13 drives the bottom support plate 1301 to return to its original position. The filter plate 3 and the base frame 7 can then be separated from the sealing frame 2 by the return force of the support spring 601.

[0056] An annular limiting frame 4 is fixedly installed inside the return air vent body 1. The annular limiting frame 4 is coaxial with the drive shaft 5, and a plurality of arc-shaped notches 401 are opened inside the annular limiting frame 4. The arc-shaped notches 401 are linearly adapted to the filter plates 3, and an arc-shaped limiting piece 403 is fixedly installed on the outside of the annular limiting frame 4. When the filter plates 3 rotate, they can enter the annular limiting frame 4 through the arc-shaped notches 401 along the arc-shaped limiting piece 403. The corresponding arc-shaped notches 401 are fixedly installed with arc-shaped blocking rods 4011 to block the filter plates 3.

[0057] Specifically, when the driving shaft 5 drives the base frame 7 and the filter plate 3 to rotate, the filter plate 3 separated from the sealing frame 2 can contact the arc-shaped limiting piece 403 and enter the interior of the annular limiting frame 4 through the cooperation of the arc-shaped limiting piece 403. The filter plate 3 entering the interior of the annular limiting frame 4 can be blocked by the arc-shaped blocking rod 4011 until the filter plate 3 rotates to the bottom of the sealing frame 2 and can be ejected through the arc-shaped notch 401.

[0058] The annular limiting frame 4 is internally rotatably connected with a plurality of limiting blocks 402, which are used to separate the corresponding filter plates 3;

[0059] A drive motor 102 is fixedly mounted on the outside of the return air vent body 1. The end of the drive shaft 5 passes through the return air vent body 1. A coupling is provided between the output end of the drive motor 102 and the end of the drive shaft 5 to drive the drive shaft 5 to run inside the return air vent body 1.

[0060] The ends of the multiple bottom support plates 1301 are fixedly mounted with pressure monitors, which are attached to the base frame 7 and are used to monitor the filtering effect of the filter plates 3;

[0061] The pressure monitor is an existing device and will not be described in detail here;

[0062] By setting up a pressure monitor, as the filter plate 3 is used for a longer time, the impurities adhering to its outer surface increase, causing the pressure value monitored by the pressure monitor to increase. The maintenance personnel can judge the use of the filter plate 3 by the pressure value and complete the timely replacement of the filter plate 3.

[0063] Sealing sheets are fixedly installed between the two ends of the annular limiting frame 4 and the interior of the return air vent body 1;

[0064] A cleaning assembly is provided inside the return air vent body 1 for cleaning the filter plate 3 after use. The cleaning assembly includes a cleaning rack 8, which is rotatably connected to the inside of the return air vent body 1. A plurality of cleaning pipes 9 are rotatably connected to the inside of the cleaning rack 8. A cleaning end head 901 is fixedly installed at the end of each of the plurality of cleaning pipes 9. A plurality of flushing nozzles 9011 are fixedly installed inside the cleaning end head 901. The flushing nozzles 9011 are used to flush cleaning water toward the filter plate 3 to achieve cleaning treatment.

[0065] When the used filter plate 3 rotates with the base frame 7 to the inside of the annular limit frame 4, the filter plate 3 can be blocked by the cooperation of the arc-shaped blocking rod 4011, and the cleaning water is sprayed through the multiple cleaning ends 901 and the flushing nozzles 9011 to automatically flush the filter plate 3;

[0066] Specifically, during the flushing process, the arc-shaped limiting piece 403 cooperates to block the cleaning water.

[0067] Specifically, the flushing nozzle 9011 is an existing device and will not be described in detail here;

[0068] The cleaning rack 8 is hollow and is used to connect to an external negative pressure device to deliver cleaning water;

[0069] A transmission belt 902 is rotatably connected between the multiple cleaning pipes 9 to drive the multiple cleaning pipes 9 to rotate, thereby achieving a flushing process on the filter plate 3;

[0070] Specifically, the transmission belt 902 is an existing chain and sprocket structure, the sprocket is sleeved on the outer side of the cleaning tube 9, and the chain and the sprocket are engaged with each other to drive the multiple cleaning tubes 9 to rotate simultaneously to achieve a comprehensive flushing operation of the filter plate 3. The chain and sprocket structure is an existing structure and is not shown in the figure;

[0071] The operation of the cleaning tube 9 is driven by a separate motor, which is not shown in the figure;

[0072] The outer side of the cleaning frame 8 is rotatably connected to a limit shaft 801, which is rotatably connected to the return air vent body 1. An adjusting cylinder 802 is fixedly installed inside the return air vent body 1. The piston end of the adjusting cylinder 802 is rotatably connected to the cleaning frame 8 for adjusting the inclination angle of the cleaning frame 8.

[0073] The adjusting cylinder 802 is used to drive the cleaning frame 8 to rotate to adjust the flushing angle;

[0074] The regulating cylinder 802 is an existing hydraulic cylinder and will not be described in detail here;

[0075] A collecting plate frame 10 is fixedly installed on the inner bottom of the return air vent body 1, and the collecting plate frame 10 is used to collect the flushed impurities;

[0076] A drying module 11 is fixedly installed inside the return air vent body 1. The drying module 11 is used to dry the filter plate 3 after washing. A one-way exhaust valve 12 is fixedly installed inside the return air vent body 1.

[0077] The drying module 11 is an existing hot air drying device for drying the filter plate 3 . The one-way exhaust valve 12 is an existing device and will not be described in detail here.

[0078] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0079] The above is a detailed description of an embodiment of the present invention. However, the content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A clean room return air vent structure capable of filtering, comprising a return air vent body (1), characterized in that: An exhaust notch (101) is provided on the side of the return air vent body (1) for discharging filtered air into the clean room; A sealing frame (2) is fixedly mounted on the top of the return air vent body (1), and a filter plate (3) is slidably connected inside the sealing frame (2). Voice coil motors (13) are fixedly mounted on all four sides of the bottom of the sealing frame (2), and the output ends of the voice coil motors (13) are connected to bottom support plates (1301). The bottom support plates (1301) are used to support the filter plate (3). The return air vent body (1) is internally connected to a driving shaft (5), a plurality of limiting rods (501) are fixed on the outside of the driving shaft (5), an outer rod (6) is slidably sleeved on the outside of the limiting rod (501), a supporting spring (601) is fixed between the end of the driving shaft (5) and the corresponding outer rod (6), the ends of the two corresponding outer rods (6) are fixedly connected to a base frame (7), and the filter plate (3) is fixedly mounted on the outside of the base frame (7) and is used to drive the base frame (7) and the filter plate (3) to rotate inside the return air vent body (1) through the rotation of the driving shaft (5), thereby completing the replacement operation of the filter plate (3) inside the sealing frame (2); An annular limiting frame (4) is fixedly installed inside the return air outlet body (1), the annular limiting frame (4) is kept coaxial with the drive shaft (5), and a plurality of arc-shaped notches (401) are opened inside the annular limiting frame (4), the arc-shaped notches (401) and the filter plate (3) are linearly adapted to each other, and an arc-shaped limiting piece (403) is fixedly installed on the outside of the annular limiting frame (4), so that when the filter plate (3) rotates, it can enter the annular limiting frame (4) through the arc-shaped notches (401) along the arc-shaped limiting piece (403), and an arc-shaped blocking rod (4011) is fixedly installed inside the corresponding arc-shaped notches (401) for blocking the filter plate (3).

2. A clean room return air vent structure capable of filtering according to claim 1, characterized in that: The annular limiting frame (4) is internally rotatably connected to a plurality of limiting blocks (402), and the limiting blocks (402) are used to separate the corresponding filter plates (3).

3. The clean room return air vent structure capable of filtering according to claim 1, characterized in that: A drive motor (102) is fixedly mounted on the outer side of the return air vent body (1), the end of the drive shaft (5) passes through the return air vent body (1), and a coupling is provided between the output end of the drive motor (102) and the end of the drive shaft (5) for driving the drive shaft (5) to operate inside the return air vent body (1).

4. The clean room return air vent structure capable of filtering according to claim 1, characterized in that: Pressure monitors are fixedly mounted on the ends of the plurality of bottom support plates (1301), and the pressure monitors are fitted to the base frame (7) for monitoring the filtering effect of the filter plate (3).

5. The clean room return air vent structure capable of filtering according to claim 1, characterized in that: Sealing sheets are fixedly installed between the two ends of the annular limiting frame (4) and the interior of the return air port body (1).

6. The clean room return air vent structure capable of filtering according to claim 1, characterized in that: A cleaning assembly is provided inside the return air vent body (1) for cleaning the filter plate (3) after use. The cleaning assembly comprises a cleaning rack (8), which is rotatably connected to the inside of the return air vent body (1). A plurality of cleaning pipes (9) are rotatably connected to the inside of the cleaning rack (8). The ends of the plurality of cleaning pipes (9) are fixedly mounted with cleaning heads (901). A plurality of flushing nozzles (9011) are fixedly mounted inside the cleaning heads (901). The flushing nozzles (9011) are used to flush cleaning water toward the filter plate (3) to achieve cleaning treatment.

7. The clean room return air vent structure capable of filtering according to claim 6, characterized in that: A transmission belt (902) is rotatably connected between the plurality of cleaning tubes (9) for driving the plurality of cleaning tubes (9) to rotate, thereby achieving flushing of the filter plate (3).

8. The clean room return air vent structure capable of filtering according to claim 6, characterized in that: The outer side of the cleaning frame (8) is rotatably connected to a limit shaft (801), and the limit shaft (801) is rotatably connected to the return air outlet body (1). An adjusting cylinder (802) is fixedly installed inside the return air outlet body (1), and the piston end of the adjusting cylinder (802) is rotatably connected to the cleaning frame (8) for adjusting the inclination angle of the cleaning frame (8).

9. The clean room return air vent structure capable of filtering according to claim 6, characterized in that: A collecting plate frame (10) is fixedly mounted on the inner bottom of the return air vent body (1), and the collecting plate frame (10) is used to collect flushed impurities.

10. The clean room return air vent structure capable of filtering according to claim 1, characterized in that: A drying module (11) is fixedly installed inside the return air vent body (1), and the drying module (11) is used to dry the filter plate (3) after washing. A one-way exhaust valve (12) is fixedly installed inside the return air vent body (1).

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