Automatic pressure difference adjusting device for clean room

Abstract

The invention relates to an automatic pressure difference adjusting device for a clean room, and belongs to the technical field of air pressure adjusting.The automatic pressure difference adjusting device for the clean room comprises an air duct, a sealing groove is formed in the air exhaust side of the air duct, a sealing plate is installed on the air exhaust side of the air duct, and a sealing strip is fixedly connected to one side of the sealing plate; a transmission mechanism; a flow guide mechanism; and a cleaning mechanism. Through the arrangement of the pressure adjusting mechanism, when the position of the heavy hammer on the lever needs to be adjusted according to the pressure needed in the clean room and the external air volume, the servo motor is started to enable the threaded rod to rotate, then the heavy hammer slides on the lever, and the purpose of adjusting the position of the heavy hammer is achieved; the sealing plate can be automatically opened under the action of the pressure when the pressure in the clean chamber is larger than the needed pressure, the purpose of adjusting the pressure in the clean chamber is achieved, the pressure in the clean chamber can be adjusted by changing the position of the heavy hammer on the lever, and therefore the air cleanliness in the clean chamber is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of air pressure regulation, and particularly relates to an automatic differential pressure regulating device for a clean room. Background Art

[0002] A clean room refers to a specially designed room in which pollutants such as microparticles, harmful air, and bacteria in the air within a certain space range are excluded, and the indoor temperature, cleanliness, indoor pressure, air flow velocity and distribution, noise vibration, lighting, and static electricity are controlled within a certain required range; that is, regardless of how the external air conditions change, the indoor can maintain the previously set cleanliness, temperature and humidity, pressure and other performance characteristics; the most important function of a clean room is to control the cleanliness, temperature and humidity of the atmosphere contacted by the product, so that the product can be produced and manufactured in a good environmental space; clean rooms can be divided into industrial clean rooms and biological clean rooms according to different uses; an industrial clean room is a clean room mainly targeting the control of microparticles, usually applicable to the production of microelectronic products, precision machining, the assembly of electronic components and certain electronic products, fine chemical industry, the production of precision instruments and meters, etc.; a clean room must maintain a certain positive pressure.

[0003] Currently, during the use of a clean room, it is necessary to adjust the internal pressure of the clean room to maintain a stable air flow direction inside the clean room, ensure the effective discharge of pollutants, and at the same time maintain a stable temperature and humidity inside the clean room. However, the existing differential pressure regulating device for a clean room can generally only be opened when the static pressure difference between the inside and outside of the clean room is greater than a specific value, and cannot adjust the internal pressure of the clean room according to requirements, affecting the air flow direction and temperature and humidity inside the clean room. Based on this, an automatic differential pressure regulating device for a clean room is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a reasonably designed automatic differential pressure regulating device for a clean room to solve the above problems.

[0005] The present invention achieves the above purpose through the following technical solutions: An automatic differential pressure regulating device for a clean room, including an air duct, a sealing groove is provided on the exhaust side of the air duct, a sealing plate is installed on the exhaust side of the air duct, a sealing strip is fixedly connected to one side of the sealing plate, and further includes: A pressure regulating mechanism fixedly connected to the other side of the sealing plate, the pressure regulating mechanism includes a fixing plate fixedly connected to the other side of the sealing plate, a lever is fixedly connected to the lower surface of the fixing plate, a weight is slidably connected to the lever, a servo motor is installed on the upper surface of the fixing plate, an output end of the servo motor is fixedly connected to a threaded rod, and the threaded rod penetrates through the weight and is threadedly connected to the weight; A transmission mechanism, a flow guiding mechanism and a cleaning mechanism installed in the air duct.

[0006] As a further optimization solution of the present invention, the sealing groove and the sealing strip are adapted to each other. The threaded rod penetrates through the fixing plate and is rotatably connected to the fixing plate. The threaded rod is arranged inside the lever and is rotatably connected to the lever.

[0007] As a further optimization solution of the present invention, the flow guiding mechanism includes a rotating rod rotatably connected inside the air duct. A fourth bevel gear is fixedly connected to the outer surface of the rotating rod. A plurality of worm gears are fixedly connected to the outer surface of the rotating rod at equal intervals. A worm is engaged with the outer surface of the worm gear. A connecting shaft is fixedly connected to the inner surface of the worm gear. A flow guiding blade is fixedly connected to the connecting shaft.

[0008] As a further optimization solution of the present invention, the connecting shaft is rotatably connected to the air duct. The flow guiding blade is arranged on the air inlet side of the air duct.

[0009] As a further optimization solution of the present invention, the transmission mechanism includes rotating shafts fixedly connected to the tops of both sides of the sealing plate. A first bevel gear is fixedly connected to the outer surface of the rotating shaft. A transmission shaft is rotatably connected inside the air duct. A second bevel gear and a third bevel gear are respectively fixedly connected to both ends of the transmission shaft. The second bevel gear is engaged with the first bevel gear.

[0010] As a further optimization solution of the present invention, the rotating shaft is rotatably connected to the air duct. The third bevel gear is engaged with the fourth bevel gear.

[0011] As a further optimization solution of the present invention, the cleaning mechanism includes a driving motor installed inside the air duct. A reciprocating screw rod is fixedly connected to the output end of the driving motor. The reciprocating screw rod penetrates through and is threadedly connected to a sliding frame. A sliding groove is formed on one side of the sliding frame. A sliding block is slidably connected inside the sliding groove. A cleaning frame is fixedly connected to the end of the sliding block.

[0012] As a further optimization solution of the present invention, a groove is formed on the inner top of the air duct. The sliding frame is slidably connected to the groove.

[0013] As a further optimization solution of the present invention, the reciprocating screw rod penetrates through the air duct and is rotatably connected to the air duct. The cleaning frame is sleeved on the outer surface of the flow guiding blade.

[0014] As a further optimization solution of the present invention, the sliding groove is set to be arc-shaped. The sliding block is set to be inverted "T" shaped. One end of the cleaning frame fixedly connected to the sliding block is attached to the sliding frame.

[0015] The beneficial effects of the present invention are as follows: 1. Through the setting of the pressure regulating mechanism, when it is necessary to adjust the position of the weight on the lever according to the required pressure inside the clean room and the external air volume so as to maintain a stable air flow direction and temperature and humidity inside the clean room, at this time, the servo motor is started to make the threaded rod rotate, and then the weight slides on the lever, achieving the purpose of adjusting the position of the weight, so that the sealing plate can automatically open under the action of pressure when the pressure inside the clean room is greater than the required pressure, realizing the purpose of adjusting the pressure inside the clean room. And by changing the position of the weight on the lever, the pressure inside the clean room can be adjusted to ensure the air cleanliness inside the clean room and ensure the stability of the air flow direction and temperature and humidity inside the clean room.

[0016] 2. Through the combined use of the transmission mechanism and the diversion mechanism, when the sealing plate is not opened, at this time the diversion blades are in a horizontal state, and the horizontal diversion blades can reduce the direct impact of the air flow inside the clean room on the inner wall of the air duct, resulting in damage to the inside of the air duct under the long-term impact of high-pressure air flow, protecting the air duct well and extending the service life of the air duct, thereby ensuring the cleanliness inside the clean room. During the process of the sealing plate rotating outward to open, the angle of the diversion blades will be changed to make the diversion blades tilt downward, which can guide the gas inside the clean room downward and discharge it from the opening position of the sealing plate, improving the exhaust efficiency and avoiding the backflow of external air into the clean room, further ensuring the air cleanliness inside the clean room.

[0017] 3. Through the setting of the cleaning mechanism, when the sealing plate is opened, at this time the driving motor is started to make the reciprocating lead screw rotate, and then the carriage slides back and forth along the groove under the rotation of the reciprocating lead screw. At this time, the carriage will drive the cleaning frame to slide along the outer surface of the diversion blade through the chute and the slider, cleaning the outer surface of the diversion blade and removing the pollutants adhered to the outer surface of the diversion blade from the air inside the clean room. And because the diversion blades are in a downward-tilted state at this time, the pollutants adhered to the outer surface of the diversion blades can be discharged from the clean room along with the outward discharge of the air inside the clean room, further ensuring the air quality inside the clean room and avoiding the accumulation of pollutants adhered to the diversion blades in the clean room. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall front three-dimensional structure schematic diagram of the present invention; Figure 2 is the overall back three-dimensional structure schematic diagram of the present invention; Figure 3 is the top-sectional structure schematic diagram of the present invention; Figure 4 is of the present invention Figure 3 enlarged structure schematic diagram at A in; Figure 5 is the side-sectional structure schematic diagram of the present invention; Figure 6 is the Figure 5 schematic diagram of the enlarged structure at position B in the present invention; Figure 7 is the schematic diagram of the top surface cut-open structure of the present invention; Figure 8 is the Figure 7 schematic diagram of the enlarged structure at position C in the present invention; Figure 9 is the schematic diagram of the middle cut-open structure of the present invention; Figure 10 is the Figure 9 schematic diagram of the enlarged structure at position D in the present invention; Figure 11 is the Figure 9 schematic diagram of the enlarged structure at position E in the present invention; Figure 12 is the three-dimensional front view structure diagram of the pressure regulating mechanism of the present invention; Figure 13 is the three-dimensional back view structure diagram of the pressure regulating mechanism of the present invention; Figure 14 is the Figure 13 schematic diagram of the enlarged structure at position F in the present invention; Figure 15 is the Figure 13 schematic diagram of the enlarged structure at position G in the present invention.

[0019] In the figure: 1, air duct; 2, sealing groove; 3, sealing plate; 4, sealing strip; 5, pressure regulating mechanism; 51, fixing plate; 52, lever; 53, weight; 54, servo motor; 55, threaded rod; 6, transmission mechanism; 61, rotating shaft; 62, first bevel gear; 63, transmission shaft; 64, second bevel gear; 65, third bevel gear; 7, guiding mechanism; 71, rotating rod; 72, fourth bevel gear; 73, worm; 74, worm gear; 75, connecting shaft; 76, guiding vane; 8, cleaning mechanism; 81, driving motor; 82, reciprocating lead screw; 83, carriage; 84, groove; 85, chute; 86, slider; 87, cleaning frame. Detailed implementation manners

[0020] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0021] Embodiment: As Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 ,Figure 9 , Figure 10 , Figure 12 , Figure 13 and Figure 14 As shown in Figure 14 , an automatic differential pressure regulating device for a clean room is installed in the clean room, and the installation height is generally 20 cm below the ceiling. It includes an air duct 1. A sealing groove 2 is provided on the exhaust side of the air duct 1, and a sealing plate 3 is installed on the exhaust side of the air duct 1. One side of the sealing plate 3 is fixedly connected with a sealing strip 4, and the sealing groove 2 and the sealing strip 4 are adapted to each other. It further includes: a pressure regulating mechanism 5 fixedly connected to the other side of the sealing plate 3. The pressure regulating mechanism 5 includes a fixing plate 51 fixedly connected to the other side of the sealing plate 3. The lower surface of the fixing plate 51 is fixedly connected with a lever 52. A weight 53 is slidably connected to the lever 52. A servo motor 54 is installed on the upper surface of the fixing plate 51. The output end of the servo motor 54 is fixedly connected with a threaded rod 55. The threaded rod 55 passes through the fixing plate 51 and is rotatably connected to the fixing plate 51. The threaded rod 55 is arranged inside the lever 52 and is rotatably connected to the lever 52. The threaded rod 55 passes through the weight 53 and is threadedly connected to the weight 53. Among them, by changing the position of the weight 53 on the lever 52, the pressure required to open the sealing plate 3 can be changed.

[0022] During use, when adjusting the position of the counterweight 53 on the lever 52 according to the required pressure inside the clean room and the external air volume to maintain a stable air flow direction, temperature, and humidity inside the clean room, the servo motor 54 is started at this time to rotate the threaded rod 55, thereby causing the counterweight 53 to slide on the outer surface of the lever 52, achieving the purpose of adjusting the position of the counterweight 53, enabling the sealing plate 3 to automatically open under the action of pressure when the pressure inside the clean room is greater than the required pressure, realizing the purpose of adjusting the pressure inside the clean room, ensuring the air cleanliness inside the clean room, and ensuring the stability of the air flow direction, temperature, and humidity inside the clean room (it should be noted that the reason for maintaining the stability of the air flow direction is that between clean rooms with different cleanliness levels or different functions, by adjusting the pressure difference, air flows from the area with high cleanliness to the area with low cleanliness, preventing the air in the area with low cleanliness from flowing back into the area with high cleanliness, thereby preventing cross-contamination, and a stable air flow direction can ensure the cleanliness inside the clean room). In addition, adjusting the pressure inside the clean room can also control the air flow velocity inside the clean room within an appropriate range, which can not only ensure the effective replacement of air and the discharge of pollutants but also not affect the normal progress of production or experiments due to too fast or too slow air flow velocity. When the pressure inside the clean room is greater than the required pressure, the air pressure inside the clean room will push open the sealing plate 3 at this time, causing the sealing plate 3 to rotate outward, thereby opening the air duct 1, and the excess gas inside the clean room is discharged outward through the air duct 1. When the pressure inside the clean room drops to the required pressure, the sealing plate 3 rotates inward to cover the air duct 1 again, and the sealing strip 4 enters the sealing groove 2. At the same time, due to the setting of the counterweight 53, the sealing plate 3 will be closely attached to the air duct 1, preventing external air from entering the clean room and polluting the air inside the clean room; In addition, when it is necessary to lower the indoor temperature, the servo motor 54 is started to rotate the threaded rod 55, thereby causing the counterweight 53 to slide upward on the outer surface of the lever 52, enabling the sealing plate 3 to open under the state of a small positive pressure difference, thereby achieving the purpose of adjusting the indoor temperature; In addition, when a fire breaks out inside the clean room, the indoor pressure of the clean room will increase at this time. The servo motor 54 is started to rotate the threaded rod 55, thereby causing the counterweight 53 to slide upward on the outer surface of the lever 52, prompting the sealing plate 3 to open, thereby rapidly discharging the indoor air and maintaining an equilibrium pressure.

[0023] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 12 and Figure 13As shown in the figure, the differential pressure automatic adjustment device further includes: a transmission mechanism 6 installed in the air duct 1. The transmission mechanism 6 includes a rotating shaft 61 fixedly connected to the tops of both sides of the sealing plate 3. The rotating shaft 61 is rotatably connected to the air duct 1. A first bevel gear 62 is fixedly connected to the outer surface of the rotating shaft 61. A transmission shaft 63 is rotatably connected in the air duct 1. Two ends of the transmission shaft 63 are respectively fixedly connected with a second bevel gear 64 and a third bevel gear 65. The second bevel gear 64 meshes with the first bevel gear 62. It further includes a flow guiding mechanism 7 installed in the air duct 1 for guiding the airflow. The flow guiding mechanism 7 includes a rotating rod 71 rotatably connected in the air duct 1. A fourth bevel gear 72 is fixedly connected to the outer surface of the rotating rod 71. The third bevel gear 65 meshes with the fourth bevel gear 72. A plurality of worm gears 73 are fixedly connected to the outer surface of the rotating rod 71 at equal intervals. A worm wheel 74 is meshed with the outer surface of the worm gear 73. A connecting shaft 75 is fixedly connected to the inner surface of the worm wheel 74. The connecting shaft 75 is rotatably connected to the air duct 1. A flow guiding vane 76 is fixedly connected to the connecting shaft 75. The flow guiding vane 76 is arranged on the air inlet side of the air duct 1. When the sealing plate 3 is not opened, the flow guiding vane 76 is in a horizontal state at this time. The horizontal flow guiding vane 76 can reduce the direct impact of the airflow in the clean room on the inner wall of the air duct 1, preventing damage to the inside of the air duct 1 due to the long-term impact of high-pressure airflow, providing good protection for the air duct 1, extending the service life of the air duct 1, and thus ensuring the cleanliness of the inside of the clean room.

[0024] During the process of the sealing plate 3 rotating outward and opening, the sealing plate 3 will drive the rotating shaft 61 to rotate, and then drive the first bevel gear 62 to rotate. At this time, since the first bevel gear 62 meshes with the second bevel gear 64, the rotation of the first bevel gear 62 will drive the transmission shaft 63 to rotate through the second bevel gear 64, and then the third bevel gear 65 drives the fourth bevel gear 72 to rotate, causing the rotating rod 71 to drive a plurality of worm gears 73 to rotate. The rotation of the plurality of worm gears 73 will drive the worm wheel 74 to rotate, and then drive the flow guiding vane 76 to rotate downward through the connecting shaft 75. When the sealing plate 3 is opened, the gas inside the clean room can be guided downward and discharged from the opening position of the sealing plate 3, and it can prevent the outside airflow from flowing back into the clean room, thus ensuring the cleanliness of the air inside the clean room. During the process of the sealing plate 3 changing from the open state to the closed state, the flow guiding vane 76 will rotate back to the horizontal state at this time.

[0025] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 8 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 15As shown in the figure, the differential pressure automatic regulating device further includes a cleaning mechanism 8 installed in the air duct 1 for cleaning the guiding mechanism 7. The cleaning mechanism 8 includes a driving motor 81 installed in the air duct 1. The output end of the driving motor 81 is fixedly connected with a reciprocating lead screw 82. The reciprocating lead screw 82 penetrates through the air duct 1 and is rotatably connected with the air duct 1. The reciprocating lead screw 82 penetrates through and is threadedly connected with a carriage 83. A groove 84 is formed in the inner top of the air duct 1. The carriage 83 is slidably connected with the groove 84. An arc-shaped chute 85 is formed on one side of the carriage 83. The chute 85 is arranged in an arc shape. A slider 86 is slidably connected in the chute 85. The slider 86 is arranged in an inverted "T" shape. The end of the slider 86 is fixedly connected with a cleaning frame 87. The cleaning frame 87 is sleeved on the outer surface of the guide vane 76. One end of the cleaning frame 87 fixedly connected with the slider 86 is attached to the carriage 83.

[0026] When the sealing plate 3 is opened, the driving motor 81 is started at this time to make the reciprocating lead screw 82 rotate. Then, the carriage 83 slides back and forth in the groove 84 under the rotation of the reciprocating lead screw 82. At this time, the carriage 83 will drive the cleaning frame 87 to slide along the outer surface of the guide vane 76 through the chute 85 and the slider 86, cleaning the outer surface of the guide vane 76 and removing the pollutants in the air inside the clean room adhering to the outer surface of the guide vane 76. And because the guide vane 76 is in a downward inclined state at this time, the pollutants adhering to the outer surface of the guide vane 76 can be discharged out of the clean room along with the outward discharge of the air inside the clean room, further ensuring the air quality inside the clean room and avoiding the accumulation of pollutants adhering to the guide vane 76 in the clean room. When the guide vane 76 rotates, it will drive the cleaning frame 87 to rotate. Then, the slider 86 rotates in the chute 85, ensuring that the cleaning frame 87 is always connected to the carriage 83 and guaranteeing the comprehensive cleaning of the guide vane 76 by the cleaning frame 87. When the sealing plate 3 changes from the open state to the closed state, the driving motor 81 automatically shuts down at this time to prevent the pollutants on the guide vane 76 from being scraped off by the cleaning frame 87 and falling into the clean room.

[0027] The specific working principle of the present invention is as follows: During use, when adjusting the position of the counterweight 53 on the lever 52 according to the required pressure inside the cleanroom and the external air volume to maintain a stable air flow direction, temperature, and humidity inside the cleanroom, the servo motor 54 is started at this time to rotate the threaded rod 55, thereby causing the counterweight 53 to slide on the outer surface of the lever 52, achieving the purpose of adjusting the position of the counterweight 53, so that the sealing plate 3 can automatically open under the action of pressure when the pressure inside the cleanroom is greater than the required pressure, realizing the purpose of adjusting the pressure inside the cleanroom to ensure the air cleanliness inside the cleanroom and ensuring the stability of the air flow direction, temperature, and humidity inside the cleanroom (it should be noted that the reason for maintaining the stability of the air flow direction is that between cleanrooms with different cleanliness levels or different functions, by adjusting the pressure difference, air flows from the area with high cleanliness to the area with low cleanliness, preventing the air in the area with low cleanliness from flowing back into the area with high cleanliness, thereby preventing cross-contamination). In addition, adjusting the pressure inside the cleanroom can also control the air flow velocity inside the cleanroom within an appropriate range, which can not only ensure the effective replacement of air and the discharge of pollutants, but also not affect the normal progress of production or experiments due to too fast or too slow air flow velocity. When the pressure inside the cleanroom is greater than the required pressure, the air pressure inside the cleanroom will push open the sealing plate 3 at this time, causing the sealing plate 3 to rotate outward, and then the air duct 1 will open, and the excess gas inside the cleanroom will be discharged outward through the air duct 1; During the process of the sealing plate 3 rotating outward to open, the sealing plate 3 will drive the rotating shaft 61 to rotate, and then drive the first bevel gear 62 to rotate. At this time, since the first bevel gear 62 meshes with the second bevel gear 64, the rotation of the first bevel gear 62 will drive the transmission shaft 63 to rotate through the second bevel gear 64, and then the third bevel gear 65 will drive the fourth bevel gear 72 to rotate, causing the rotating rod 71 to drive a plurality of worm gears 73 to rotate, and the rotation of the plurality of worm gears 73 will drive the worm wheels 74 to rotate, and then drive the guide vane 76 to rotate downward through the connecting shaft 75. When the guide vane 76 rotates, it will drive the cleaning frame 87 to rotate, and then cause the slider 86 to rotate in the chute 85, ensuring that the cleaning frame 87 is always connected to the sliding frame 83, ensuring that the cleaning frame 87 can clean the guide vane 76 comprehensively. When the sealing plate 3 opens, it can guide the gas inside the cleanroom downward and discharge it from the opening position of the sealing plate 3, and can prevent the external air flow from flowing back into the cleanroom, thereby ensuring the air cleanliness inside the cleanroom; When the sealing plate 3 is opened, the driving motor 81 is started at this time to rotate the reciprocating lead screw 82. As a result, the carriage 83 slides back and forth in the groove 84 under the rotation of the reciprocating lead screw 82. At this time, the carriage 83 will drive the cleaning frame 87 to slide along the outer surface of the guide vane 76 through the chute 85 and the slider 86, cleaning the outer surface of the guide vane 76 and removing the pollutants in the air inside the clean room adhering to the outer surface of the guide vane 76. And because the guide vane 76 is in a downward inclined state at this time, the pollutants adhering to the outer surface of the guide vane 76 can be discharged out of the clean room along with the outward discharge of the air inside the clean room, further ensuring the air quality inside the clean room and avoiding the accumulation of pollutants adhering to the guide vane 76 in the clean room; When the pressure inside the clean room drops to the required pressure, the sealing plate 3 rotates inward to cover the air duct 1 again at this time, and the sealing strip 4 enters the sealing groove 2. At the same time, due to the setting of the weight 53, the sealing plate 3 will be closely attached to the air duct 1 to prevent external air from entering the clean room and polluting the air inside the clean room. At the same time, the driving motor 81 automatically shuts down to prevent the pollutants on the guide vane 76 from being scraped off by the cleaning frame 87 and falling into the clean room; During the process of the sealing plate 3 changing from the open state to the closed state, the guide vane 76 will rotate back to the horizontal state at this time.

[0028] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A clean room pressure difference automatic regulating device, comprising an air duct (1), a sealing groove (2) is provided on the exhaust side of the air duct (1), a sealing plate (3) is installed on the exhaust side of the air duct (1), and a sealing strip (4) is fixedly connected to one side of the sealing plate (3), characterized in that: Also includes: A pressure regulating mechanism (5) fixedly connected to the other side of the sealing plate (3), the pressure regulating mechanism (5) comprising a fixed plate (51) fixedly connected to the other side of the sealing plate (3), a lever (52) fixedly connected to the lower surface of the fixed plate (51), a weight (53) slidably connected to the lever (52), a servo motor (54) mounted on the upper surface of the fixed plate (51), a threaded rod (55) fixedly connected to the output end of the servo motor (54), the threaded rod (55) penetrating the weight (53) and connected to the weight (53) by a thread; A transmission mechanism (6), a flow guiding mechanism (7) and a cleaning mechanism (8) are installed in the air duct (1).

2. The clean room pressure difference automatic adjustment device according to claim 1, characterized in that: The sealing groove (2) and the sealing strip (4) are matched, the threaded rod (55) passes through the fixing plate (51) and is rotatably connected to the fixing plate (51), and the threaded rod (55) is arranged in the lever (52) and is rotatably connected to the lever (52).

3. The clean room pressure difference automatic adjustment device according to claim 1, characterized in that: The air guide mechanism (7) comprises a rotating rod (71) rotatably connected to the air duct (1); a fourth bevel gear (72) is fixedly connected to the outer surface of the rotating rod (71); a plurality of worms (73) are fixedly connected to the outer surface of the rotating rod (71) at equal intervals; a worm wheel (74) is meshed on the outer surface of the worm (73); a connecting shaft (75) is fixedly connected to the inner surface of the worm wheel (74); and a guide vane (76) is fixedly connected to the connecting shaft (75).

4. The clean room pressure difference automatic regulating device according to claim 3, characterized in that: The connecting shaft (75) is rotatably connected to the air duct (1), and the guide vane (76) is arranged on the air inlet side of the air duct (1).

5. The clean room pressure difference automatic regulating device according to claim 3, characterized in that: The transmission mechanism (6) comprises a rotating shaft (61) fixedly connected to the top of both sides of the sealing plate (3); a first bevel gear (62) is fixedly connected to the outer surface of the rotating shaft (61); a transmission shaft (63) is rotatably connected in the air duct (1); two ends of the transmission shaft (63) are respectively fixedly connected to a second bevel gear (64) and a third bevel gear (65); the second bevel gear (64) is meshed with the first bevel gear (62).

6. The clean room pressure difference automatic regulating device according to claim 5, characterized in that: The rotating shaft (61) is rotationally connected to the air duct (1), and the third bevel gear (65) is meshed with the fourth bevel gear (72).

7. The clean room pressure difference automatic regulating device according to claim 3, characterized in that: The cleaning mechanism (8) comprises a driving motor (81) installed in the air duct (1); the output end of the driving motor (81) is fixedly connected to a reciprocating screw rod (82); the reciprocating screw rod (82) passes through and is threadedly connected to a slide frame (83); a slide groove (85) is provided on one side of the slide frame (83); a sliding block (86) is slidably connected in the sliding groove (85); and a cleaning frame (87) is fixedly connected to the end of the sliding block (86).

8. The clean room pressure difference automatic regulating device according to claim 7, characterized in that: The inner top of the air duct (1) is provided with a groove (84), and the sliding frame (83) is slidably connected to the groove (84).

9. The clean room pressure difference automatic regulating device according to claim 7, characterized in that: The reciprocating screw (82) passes through the air duct (1) and is rotatably connected to the air duct (1), and the cleaning frame (87) is sleeved on the outer surface of the guide vane (76).

10. The clean room pressure difference automatic regulating device according to claim 7, characterized in that: The slide groove (85) is configured to be arc-shaped, the slide block (86) is configured to be in an inverted "T" shape, and one end of the cleaning frame (87) fixedly connected to the slide block (86) is in contact with the slide frame (83).

Images