Control device for preventing smell diffusion in clean room

Abstract

The control device comprises a first closed clean room and a second closed clean room, a material conveying opening used for conveying materials is formed between the first closed clean room and the second closed clean room, and the control device body used for preventing odor diffusion is arranged at the position, close to the material conveying opening, of the second closed clean room. The control device comprises a box body, an exhaust pipe, a fan controller and a supporting column, a feeding port and a discharging port are formed in the two sides of the box body, the fan controller comprises an air inlet, the air inlet is communicated with the second closed clean chamber, and the air pressure intensity of the first closed clean chamber and the air pressure intensity of the second closed clean chamber are both larger than the air pressure intensity in the box body. Under the action of atmospheric pressure, pollutants in the second closed clean chamber and organic solvent diffusions in the first closed clean chamber enter the box body and are discharged through the exhaust pipe, so that airflow communication of the first closed clean chamber and the second closed clean chamber is isolated, and local laminar flow and high cleanliness are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of clean rooms, and more specifically relates to a control device for preventing odor diffusion in a clean room. Background Art

[0002] A clean room is a specially designed room that can remove pollutants such as particulate matter, harmful air, and bacteria from the air within a certain space, and control the indoor temperature, cleanliness, indoor pressure, air flow velocity and distribution, noise, vibration, lighting, and static electricity within a certain required range.

[0003] In a clean room, due to process requirements, some equipment will produce toxic and hazardous gases. The traditional method of preventing the spread of pollutants is to use partitions and negative pressure to isolate the contaminated area. However, ordinary partitions cannot ensure that pollutants do not leak and spread through gaps. Although using negative pressure for isolation can prevent the pollution in the clean room from leaking out, the existence of negative pressure will cause the pollution outside the clean room to enter the clean room due to the pressure difference, causing pollution to the clean room.

[0004] A Chinese utility model patent with announcement number CN205128566U discloses a high-clean laboratory ventilation system, which includes a laboratory, an air supply unit, and an exhaust unit. The air supply unit and the exhaust unit are respectively installed on the top of the laboratory. The air supply unit includes an air supply and exhaust unit and an air supply pipe. One end of the air supply pipe is connected to the top of the air supply and exhaust unit, and the other end is provided with an air supply port. The exhaust unit includes a front air supply fume hood, a main exhaust duct and an exhaust fan unit. The top of the front air supply fume hood is provided with an exhaust duct, the end of the main exhaust duct is provided with an exhaust port, and the exhaust fan unit is connected to the main exhaust duct through an exhaust duct.

[0005] However, in the prior art, since some chemical reagents volatilize and produce toxic gases, positive pressure must be maintained in the clean room. However, odors and organic solvents in the positive pressure environment diffuse into the external low-pressure environment through the holes in the product conveyor belt, polluting the external environment. The diffusion of organic solvents also brings more production safety hazards. Summary of the invention

[0006] Therefore, in order to solve the above technical problems, the present invention proposes a control device for preventing odor from spreading in a clean room, comprising a first closed clean room and a second closed clean room arranged according to different environmental cleanliness required by the production process, a material conveying port 10 for conveying materials is provided between the first closed clean room and the second closed clean room, and a control device 20 for preventing odor from spreading is provided near the material conveying port 10 in the second closed clean room, the control device 20 comprises a box 201, an exhaust duct 202, a fan controller 203 and a support column 204, the top end of the support column 204 is connected to the bottom end of the box 201, the bottom end of the support column 204 is connected to the ground, the bottom end of the exhaust duct 202 is connected to one side of the upper surface of the box 201, the top end of the exhaust duct 202 is connected to a central exhaust gas treatment device, the fan controller 203 is placed at an end away from the exhaust duct 202, and a feed port 30 and a discharge port are provided on both sides of the box 201. 40, and the feed port 30 and the discharge port 40 are parallel to the material conveying port 10 and are on the same horizontal plane, the fan controller 203 includes an air inlet 50, and the air inlet 50 is connected to the second closed clean room, the air pressure of the first closed clean room and the second closed clean room are both greater than the air pressure in the box body 201, under the action of atmospheric pressure, the airflow of the first closed clean room and the second closed clean room flows into the box body 201 through the air inlet 50, and the airflow is discharged through the exhaust pipe 202. When the material is conveyed, under the action of atmospheric pressure, the pollutants in the second closed clean room and the organic solvent diffusion products in the first closed clean room enter the box body 201, and are discharged through the exhaust pipe 202, which isolates the airflow of the first closed clean room and the second closed clean room from being connected, so that local laminar flow is achieved with high cleanliness, while controlling temperature and humidity to ensure production, automatic adaptation and good reliability.

[0007] A control device for preventing odor diffusion in a clean room, comprising a first closed clean room and a second closed clean room arranged according to different environmental cleanliness required by a production process, a material conveying port 10 for conveying materials is arranged between the first closed clean room and the second closed clean room, a control device 20 for preventing odor diffusion is arranged near the material conveying port 10 in the second closed clean room, the control device 20 comprises a box 201, an exhaust pipe 202, a fan controller 203 and a support column 204, the top end of the support column 204 is connected to the bottom end of the box 201, the bottom end of the support column 204 is connected to the ground, the bottom end of the exhaust pipe 202 is connected to one side of the upper surface of the box 201, the top end of the exhaust pipe 202 is connected to a central exhaust gas treatment device, the fan controller 203 is placed at one end away from the exhaust pipe 202, and a feed port 30 and a discharge port 30 are arranged on both sides of the box 201 The blower controller 203 includes an air inlet 50, and the air inlet 50 is connected to the second closed clean room. The air pressure of the first closed clean room and the second closed clean room is greater than the air pressure in the box body 201. Under the action of atmospheric pressure, the airflow of the first closed clean room and the second closed clean room flows into the box body 201 through the air inlet 50, and the airflow is discharged through the exhaust pipe 202. When conveying materials, under the action of atmospheric pressure, the pollutants in the second closed clean room and the organic solvent diffusion products in the first closed clean room enter the box body 201 and are discharged through the exhaust pipe 202, thereby isolating the airflow of the first closed clean room and the second closed clean room from communicating with each other, so as to achieve better cleanliness and strong reliability.

[0008] Furthermore, the fan controller 203 also includes a high efficiency filter 60, which is placed at the output end of the fan controller 203 and is used to block particle dust and various suspended matter.

[0009] Furthermore, the model of the high efficiency filter 60 is an ultra-low resistance PTFE high efficiency H14 filter.

[0010] Furthermore, the diameter of the air inlet is 250 mm.

[0011] Furthermore, the box body 201 is a closed cavity formed by a plurality of color steel plates 140 , a T-shaped clamp 150 is provided between two adjacent color steel plates 140 , and the two adjacent color steel plates 140 are clamped with the T-shaped clamp 150 , and the connection is sealed by sealant to prevent leakage.

[0012] Furthermore, a grille plate 70 is provided on one side of the box body 201 near the exhaust duct 202, and the grille plate 70 is covered with a plurality of rows of evenly spaced air holes, and the air holes are circular or elliptical. The air holes can block particulate matter and evenly disperse the airflow reaching the air holes through the exhaust duct 202 at a uniform speed, thereby preventing the air pressure from being too high and avoiding congestion of the exhaust gas flow at the input end of the exhaust duct 202.

[0013] Furthermore, the inner sides of the upper color steel plate 140 and the lower color steel plate 140 of the box body 201 are symmetrically connected with U-shaped clamps 160, and both ends of the grille plate 70 are clamped with the corresponding U-shaped clamps 160 and sealed with sealant to prevent leakage.

[0014] Furthermore, an angle steel 170 is provided on the outer surface of the connection between the exhaust duct 202 and the box body 201 for fixing the exhaust duct 202, and an arc-shaped connector 180 is provided on the inner surface of the connection between the exhaust duct 202 and the box body 201 for sealing and facilitating the cleaning of accumulated particulate matter.

[0015] Furthermore, a speed-regulating air supply fan 80 and a static pressure box 90 are provided in the box body 201. The output end of the speed-regulating air supply fan 80 is connected to the static pressure box 90. The bottom surface of the static pressure box 90 is connected to a drum-shaped air outlet grille opening 100 near the material conveying port 10. When the speed-regulating air supply fan 80 supplies air, an air curtain is formed at the material conveying port 10 through the drum-shaped air outlet grille opening 10, thereby preventing organic solvents from diffusing to the second enclosed clean room or preventing dust from entering the first enclosed clean room, thereby improving the cleanliness.

[0016] Furthermore, the width of the drum-shaped air outlet grille opening 100 is greater than or equal to the width of the material conveying port 10, and the drum-shaped air outlet grille opening 100 is arranged in multiple rows and evenly spaced. Under the air supply of the speed-regulating blower 80, a vertical downward airflow is formed through the drum-shaped air outlet grille opening 100, and the dust blocking effect is stronger.

[0017] Furthermore, a throttling nozzle 110 is provided at the connection between the speed-regulating blower 80 and the static pressure box 90, for controlling the wind speed of the airflow entering the static pressure box 90. A wind speed sensor 190 is provided at the output end of the throttling nozzle 110, for monitoring whether the wind speed of the throttling nozzle 110 is within the calibrated value. If it is lower or higher than the calibrated value, a signal is sent to adjust the speed-regulating blower 80.

[0018] Furthermore, a micro-pressure differential sensor 120 is connected to the box 201, and a regulating valve 130 is provided on the exhaust pipe 202, which is used to monitor whether the air pressure in the box 201 is at a calibrated value. If the pressure in the box 201 is less than or greater than the calibrated value, the air pressure in the box 201 is adjusted by adjusting the wind speed of the fan controller 203 and / or the regulating valve 130.

[0019] Furthermore, the measurement range of the micro differential pressure sensor 120 is 0-50Pa.

[0020] Furthermore, the air pressure in the box 201 is -5Pa.

[0021] Furthermore, the air pressure in the first enclosed clean room is +25Pa.

[0022] Furthermore, the air pressure of the second enclosed clean room is +15Pa.

[0023] Furthermore, a fixing part 200 is provided at one end of the support column 204 close to the box body 201 , one end of the fixing part 200 is connected to the support column 204 , and the other end is connected to the fan controller 203 , so as to fix the fan controller 203 and prevent it from falling off.

[0024] Furthermore, a rubber friction pad 210 is provided at the connection between the bottom end of the support column 204 and the ground to reduce noise and prevent slipping.

[0025] Beneficial effects of the present invention: The present invention proposes a control device for preventing odor diffusion in a clean room, comprising a first closed clean room and a second closed clean room arranged according to different environmental cleanliness required by a production process, a material conveying port 10 for conveying materials is arranged between the first closed clean room and the second closed clean room, a control device 20 for preventing odor diffusion is arranged near the material conveying port 10 in the second closed clean room, the control device 20 comprises a box body 201, an exhaust duct 202, a fan controller 203 and a support column 204, the top end of the support column 204 is connected to the bottom end of the box body 201, the bottom end of the support column 204 is connected to the ground, the bottom end of the exhaust duct 202 is connected to one side of the upper surface of the box body 201, the top end of the exhaust duct 202 is connected to a central exhaust gas treatment device, the fan controller 203 is placed at an end away from the exhaust duct 202, and a feed port 30 and a discharge port 40 are arranged on both sides of the box body 201, The feed port 30 and the discharge port 40 are parallel to the material conveying port 10 and are on the same horizontal plane. The fan controller 203 includes an air inlet 50, which is connected to the second closed clean room. The air pressure of the first closed clean room and the second closed clean room is greater than the air pressure in the box 201. Under the action of atmospheric pressure, the airflow of the first closed clean room and the second closed clean room flows into the box 201 through the air inlet 50, and the airflow is discharged through the exhaust pipe 202. When conveying materials, under the action of atmospheric pressure, the pollutants in the second closed clean room and the organic solvent diffusion products in the first closed clean room enter the box 201 and are discharged through the exhaust pipe 202, thereby isolating the airflow of the first closed clean room and the second closed clean room from communicating with each other, so that local laminar flow is achieved with high cleanliness, while controlling temperature and humidity to ensure production, automatic adaptation and good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a front cross-sectional view of a control device for preventing odor diffusion in a clean room.

[0027] Figure 2 This is a partial enlarged view of a control device for preventing odor diffusion in a clean room according to the present invention.

[0028] Figure 3 This is a partial structural schematic diagram of a control device for preventing odor diffusion in a clean room according to the present invention.

[0029] Figure 4 The present invention is a side sectional view of a control device for preventing odor diffusion in a clean room.

[0030] Figure 5 This is a partial enlarged view of a control device for preventing odor diffusion in a clean room according to the present invention.

[0031] Figure 6 This is a partial enlarged view of a control device for preventing odor diffusion in a clean room according to the present invention.

[0032] Description of main component symbols:

[0033] Material conveying port 10, control device 20, box body 201, exhaust duct 202, fan controller 203, support column 204, feed port 30, discharge port 40, air inlet 50, high efficiency filter 60, grille plate 70, speed regulating blower 80, static pressure box 90, drum-type air outlet grille port 100, throttling nozzle 110, micro-pressure difference sensor 120, regulating valve 130, color steel plate 140, T-type clamp 150, U-type clamp 160, angle steel 170, arc-shaped connector 180, wind speed sensor 190, fixing part 200, rubber friction pad 210.

[0034] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0035] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0036] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including integration into a single system or component).

[0037] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Example 1

[0038] like Figure 1 As shown, it is a front cross-sectional view of a control device for preventing odor diffusion in a clean room according to the present invention; Figure 2 As shown, it is a partial enlarged view of a control device for preventing odor diffusion in a clean room according to the present invention; Figure 3 FIG. 1 is a schematic diagram of a partial structure of a control device for preventing odor diffusion in a clean room according to the present invention; Figure 4 As shown, it is a side sectional view of a control device for preventing odor diffusion in a clean room according to the present invention; Figure 5As shown, it is a partial enlarged view of a control device for preventing odor diffusion in a clean room according to the present invention; Figure 6 The figure shows a partial enlarged view of a control device for preventing odor diffusion in a clean room according to the present invention.

[0039] A control device for preventing odor diffusion in a clean room, comprising a first closed clean room and a second closed clean room arranged according to different environmental cleanliness required by a production process, a material conveying port 10 for conveying materials is arranged between the first closed clean room and the second closed clean room, a control device 20 for preventing odor diffusion is arranged near the material conveying port 10 in the second closed clean room, the control device 20 comprises a box 201, an exhaust pipe 202, a fan controller 203 and a support column 204, the top end of the support column 204 is connected to the bottom end of the box 201, the bottom end of the support column 204 is connected to the ground, the bottom end of the exhaust pipe 202 is connected to one side of the upper surface of the box 201, the top end of the exhaust pipe 202 is connected to a central exhaust gas treatment device, the fan controller 203 is placed at one end away from the exhaust pipe 202, and a feed port 30 and a discharge port 30 are arranged on both sides of the box 201 The blower controller 203 includes an air inlet 50, and the air inlet 50 is connected to the second closed clean room. The air pressure of the first closed clean room and the second closed clean room is greater than the air pressure in the box body 201. Under the action of atmospheric pressure, the airflow of the first closed clean room and the second closed clean room flows into the box body 201 through the air inlet 50, and the airflow is discharged through the exhaust pipe 202. When conveying materials, under the action of atmospheric pressure, the pollutants in the second closed clean room and the organic solvent diffusion products in the first closed clean room enter the box body 201 and are discharged through the exhaust pipe 202, thereby isolating the airflow of the first closed clean room and the second closed clean room from communicating with each other, so as to achieve better cleanliness and strong reliability.

[0040] The fan controller 203 further includes a high efficiency filter 60 , which is disposed at the output end of the fan controller 203 and is used to block particle dust and various suspended substances.

[0041] The model of the high efficiency filter 60 is an ultra-low resistance PTFE high efficiency H14 filter.

[0042] The diameter of the air inlet is 250 mm.

[0043] The box body 201 is a closed cavity formed by a plurality of color steel plates 140 , a T-shaped clamp 150 is provided between two adjacent color steel plates 140 , and the two adjacent color steel plates 140 are clamped with the T-shaped clamp 150 , and the connection is sealed by a sealant to prevent leakage.

[0044] A grille plate 70 is also provided on one side of the box body 201 near the exhaust pipe 202. The grille plate 70 is covered with multiple rows of evenly spaced air holes. The air holes are circular or elliptical. The air holes can block particulate matter and evenly disperse the airflow reaching the air holes through the exhaust pipe 202 at a uniform speed, preventing the air pressure from being too high and avoiding congestion of the exhaust gas at the input end of the exhaust pipe 202.

[0045] The inner sides of the upper and lower colored steel plates 140 and 140 of the box body 201 are symmetrically connected with U-shaped clamps 160 , and both ends of the grille plate 70 are clamped with the corresponding U-shaped clamps 160 and sealed with sealant to prevent leakage.

[0046] An angle steel 170 is provided on the outer surface of the connection between the exhaust duct 202 and the box body 201 for fixing the exhaust duct 202 , and an arc-shaped connector 180 is provided on the inner surface of the connection between the exhaust duct 202 and the box body 201 for sealing and facilitating the cleaning of accumulated particles.

[0047] A speed-regulating air supply fan 80 and a static pressure box 90 are provided in the box body 201. The output end of the speed-regulating air supply fan 80 is connected to the static pressure box 90. A drum-shaped air outlet grille opening 100 is connected to the bottom surface of the static pressure box 90 near the material conveying port 10. When the speed-regulating air supply fan 80 supplies air, an air curtain is formed at the material conveying port 10 through the drum-shaped air outlet grille opening 10, thereby preventing organic solvents from diffusing to the second enclosed clean room or preventing dust from entering the first enclosed clean room, thereby improving the cleanliness.

[0048] The width of the drum-shaped air outlet grille opening 100 is greater than or equal to the width of the material conveying port 10. The drum-shaped air outlet grille opening 100 has multiple rows and is evenly spaced. When the speed-regulating blower 80 supplies air, a vertical downward airflow is formed through the drum-shaped air outlet grille opening 100, which has a stronger effect in blocking dust.

[0049] A throttling nozzle 110 is provided at the connection between the speed-regulating blower 80 and the static pressure box 90, for controlling the wind speed of the airflow entering the static pressure box 90. A wind speed sensor 190 is provided at the output end of the throttling nozzle 110, for monitoring whether the wind speed of the throttling nozzle 110 is within the calibrated value. If it is lower or higher than the calibrated value, a signal is sent to adjust the speed-regulating blower 80.

[0050] A micro-pressure differential sensor 120 is connected to the box 201, and a regulating valve 130 is provided on the exhaust pipe 202 for monitoring whether the air pressure in the box 201 is at a calibrated value. If the pressure in the box 201 is less than or greater than the calibrated value, the air pressure in the box 201 is adjusted by adjusting the wind speed of the fan controller 203 and / or the regulating valve 130.

[0051] The measurement range of the micro differential pressure sensor 120 is 0-50Pa.

[0052] The air pressure in the box 201 is -5Pa.

[0053] The air pressure of the first closed clean room is +25Pa.

[0054] The air pressure of the second closed clean room is +15Pa.

[0055] A fixing member 200 is provided at one end of the support column 204 close to the box body 201 . One end of the fixing member 200 is connected to the support column 204 , and the other end is connected to the fan controller 203 , so as to fix the fan controller 203 and prevent it from falling off.

[0056] A rubber friction pad 210 is provided at the connection between the bottom end of the support column 204 and the ground to reduce noise and prevent slipping.

[0057] Beneficial effects of the present invention: The present invention proposes a control device for preventing odor diffusion in a clean room, comprising a first closed clean room and a second closed clean room arranged according to different environmental cleanliness required by a production process, a material conveying port 10 for conveying materials is arranged between the first closed clean room and the second closed clean room, a control device 20 for preventing odor diffusion is arranged near the material conveying port 10 in the second closed clean room, the control device 20 comprises a box body 201, an exhaust duct 202, a fan controller 203 and a support column 204, the top end of the support column 204 is connected to the bottom end of the box body 201, the bottom end of the support column 204 is connected to the ground, the bottom end of the exhaust duct 202 is connected to one side of the upper surface of the box body 201, the top end of the exhaust duct 202 is connected to a central exhaust gas treatment device, the fan controller 203 is placed at an end away from the exhaust duct 202, and a feed port 30 and a discharge port 40 are arranged on both sides of the box body 201, The feed port 30 and the discharge port 40 are parallel to the material conveying port 10 and are on the same horizontal plane. The fan controller 203 includes an air inlet 50, which is connected to the second closed clean room. The air pressure of the first closed clean room and the second closed clean room is greater than the air pressure in the box 201. Under the action of atmospheric pressure, the airflow of the first closed clean room and the second closed clean room flows into the box 201 through the air inlet 50, and the airflow is discharged through the exhaust pipe 202. When conveying materials, under the action of atmospheric pressure, the pollutants in the second closed clean room and the organic solvent diffusion products in the first closed clean room enter the box 201 and are discharged through the exhaust pipe 202, thereby isolating the airflow of the first closed clean room and the second closed clean room from communicating with each other, so that local laminar flow is achieved with high cleanliness, while controlling temperature and humidity to ensure production, automatic adaptation and good reliability.

[0058] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A control device for preventing odor diffusion in a clean room, comprising a first closed clean room and a second closed clean room arranged according to different environmental cleanliness levels required by a production process, a material conveying port (10) for conveying materials is arranged between the first closed clean room and the second closed clean room, characterized in that: A control device (20) for preventing odor diffusion is provided in the second closed clean room near the material conveying port (10), the control device (20) comprising a box (201), an exhaust pipe (202), a fan controller (203) and a support column (204), the top end of the support column (204) being connected to the bottom end of the box (201), the bottom end of the support column (204) being connected to the ground, the bottom end of the exhaust pipe (202) being connected to one side of the upper surface of the box (201), the top end of the exhaust pipe (202) being connected to a central exhaust gas treatment device, the fan controller (203) being placed at one end away from the exhaust pipe (202), and a feed port (30) and a discharge port (40) being provided on both sides of the box (201), and the feed port (30) and the discharge port (40) being parallel to the material conveying port (10) and at the same time. On the same horizontal plane, the fan controller (203) includes an air inlet (50), and the air inlet (50) is connected to the second closed clean room. The air pressure of the first closed clean room and the second closed clean room is greater than the air pressure in the box (201). Under the action of atmospheric pressure, the airflow of the first closed clean room and the second closed clean room flows into the box (201) through the air inlet (50), and the airflow is discharged through the exhaust pipe (202). When conveying materials, under the action of atmospheric pressure, the pollutants in the second closed clean room and the organic solvent diffusion products in the first closed clean room enter the box (201) and are discharged through the exhaust pipe (202), thereby isolating the airflow of the first closed clean room and the second closed clean room from communicating with each other, thereby improving the cleanliness and reliability.

2. The control device for preventing odor diffusion in a clean room according to claim 1, characterized in that: The fan controller (203) further comprises a high-efficiency filter (60), which is disposed at the output end of the fan controller (203) and is used to block particle dust and various suspended matter.

3. The control device for preventing odor diffusion in a clean room according to claim 2, characterized in that: The box body (201) is a closed cavity formed by a plurality of color steel plates (140), a T-shaped clamping piece (150) is provided between two adjacent color steel plates (140), the two adjacent color steel plates (140) are clamped with the T-shaped clamping piece (150), and the connection is sealed by a sealant to prevent leakage.

4. The control device for preventing odor diffusion in a clean room according to claim 3, characterized in that: A grille plate (70) is also provided on one side of the box body (201) near the exhaust pipe (202), and the grille plate (70) is covered with a plurality of rows of air holes at even intervals, the air holes being circular or elliptical, and capable of blocking particulate matter and evenly dispersing the airflow reaching the air holes so as to pass through the exhaust pipe (202) at a uniform speed, thereby preventing the air pressure from being too high and avoiding congestion of the exhaust gas flow at the input end of the exhaust pipe (202).

5. The control device for preventing odor diffusion in a clean room according to claim 4, characterized in that: U-shaped clamps (160) are symmetrically connected to the inner sides of the upper color steel plate (140) and the lower color steel plate (140) of the box body (201), and both ends of the grille plate (70) are clamped to the corresponding U-shaped clamps (160) and sealed by a sealant to prevent leakage.

6. The control device for preventing odor diffusion in a clean room according to claim 5, characterized in that: An angle steel (170) is provided on the outer surface of the connection between the exhaust pipe (202) and the box body (201) for fixing the exhaust pipe (202), and an arc-shaped connecting piece (180) is provided on the inner surface of the connection between the exhaust pipe (202) and the box body (201) for sealing and facilitating the cleaning of accumulated particles.

7. The control device for preventing odor diffusion in a clean room according to claim 6, characterized in that: A speed-adjustable air supply fan (80) and a static pressure box (90) are arranged in the box body (201); the output end of the speed-adjustable air supply fan (80) is connected to the static pressure box (90); a drum-shaped air outlet grille opening (100) is connected to the bottom surface of the static pressure box (90) near the material conveying port (10); when the speed-adjustable air supply fan (80) supplies air, an air curtain is formed at the material conveying port (10) through the drum-shaped air outlet grille opening (100), thereby preventing organic solvents from diffusing into the second closed clean room or preventing dust from entering the first closed clean room, thereby achieving a higher cleanliness level.

8. The control device for preventing odor diffusion in a clean room according to claim 7, characterized in that: The width of the drum-shaped air outlet grille opening (100) is greater than or equal to the width of the material conveying opening (10), and the drum-shaped air outlet grille openings (100) are arranged in multiple rows and are evenly spaced. When the speed-adjustable air blower (80) supplies air, a vertical downward airflow is formed through the drum-shaped air outlet grille openings (100), thereby achieving a stronger dust blocking effect.

9. The control device for preventing odor diffusion in a clean room according to claim 8, characterized in that: A throttling nozzle (110) is provided at the connection between the speed-regulating air supply fan (80) and the static pressure box (90) for controlling the wind speed of the airflow entering the static pressure box (90); a wind speed sensor (190) is provided at the output end of the throttling nozzle (110) for monitoring whether the wind speed of the throttling nozzle (110) is within a calibrated value; if the wind speed is lower than or higher than the calibrated value, a signal is sent to adjust the speed-regulating air supply fan (80).

10. The control device for preventing odor diffusion in a clean room according to claim 9, characterized in that: A micro-pressure differential sensor (120) is connected to the box (201), and a regulating valve (130) is provided on the exhaust pipe (202) for monitoring whether the air pressure in the box (201) is within a calibrated value. If the pressure in the box (201) is less than or greater than the calibrated value, the air pressure in the box (201) is adjusted by adjusting the wind speed of the fan controller (203) and / or the regulating valve (130).

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