Operating room dustproof system based on positive and negative pressure difference

Abstract

The utility model relates to an operation room dustproof system based on positive and negative pressure difference, which comprises an operation room and an air inlet piece, an air inlet piece is arranged on the upper portion of the left wall of the operation room and comprises a bearing cylinder, a filter screen, an air guide cylinder and an air pipe, the bearing cylinder penetrates through and is fixedly connected with the left wall of the operation room, a fan is arranged in the middle of the bearing cylinder, the filter screen is arranged at an opening in the left end of the bearing cylinder, and the air guide cylinder and the air pipe are arranged in the position, on the right side of the fan, of the bearing cylinder. The left end of the air pipe is located in the air guide cylinder, the right end of the air pipe extends out of the air guide cylinder, the right end of the outer wall of the air pipe is connected with the inner wall of the bearing cylinder through a connecting ring, and second dust collection cotton is arranged on the left side face of the connecting ring. And a shielding door is arranged on the right wall body of the operation room. The utility model solves the problems that the air entering the operating room through the fan is easy to carry dust to enter the operating room and the air pressure in the operating room is easy to reduce when the door body of the operating room is frequently opened.

Description

Technical Field

[0001] The utility model relates to the technical field of workshop dust prevention, in particular to an operating room dust prevention system based on positive and negative pressure differences. Background Art

[0002] Dust is very harmful to circuit boards. If a lot of dust is attached to the PCB during processing, it is easy to cause faults such as short circuits, resulting in malfunctions of the circuit board and reduced production efficiency. During the manufacturing and assembly of PCB boards, the cleanliness of the production environment must be ensured. Using a clean room or similar environment can effectively reduce the entry of dust, particles and other dirt into the surface of the PCB board.

[0003] At present, fans are generally used to input fresh air from the outside into the operating room, so that the environment in the operating room forms a micro-positive pressure. Micro-positive pressure means that the air pressure in the operating room is 200-400Pa greater than the outside air pressure, so that the outside dust will not enter the operating room. However, the air input into the operating room by the fan is not completely dust-free, and the air easily carries dust into the operating room. Moreover, the door of the operating room is opened frequently, and the gas in the operating room leaks through the door, which easily causes the air pressure in the operating room to decrease, resulting in poor dust prevention effect in the operating room. Summary of the invention

[0004] The utility model provides an operating room dust prevention system based on positive and negative pressure differences to solve the problems that the gas entering the operating room through the fan easily carries dust into the operating room and the frequent opening of the operating room door easily causes the air pressure in the operating room to decrease, and can improve the dust prevention effect of the operating room.

[0005] In order to solve the above problems, the technical solution of the utility model is:

[0006] A dust prevention system for an operating room based on positive and negative pressure differences comprises an operating room and an air inlet; an air outlet is arranged at the lower part of the wall of the operating room, an air inlet is arranged at the upper part of the left wall of the operating room, the air inlet comprises a bearing cylinder, a filter, an air guide cylinder and an air duct, the bearing cylinder passes through and is fixedly connected to the left wall of the operating room, a fan is arranged in the middle part of the bearing cylinder, and a filter is arranged at the left end opening, an air guide cylinder and an air duct are arranged in the bearing cylinder on the right side of the fan, the air guide cylinder is a cylindrical body with a closed left end and an open right end, the left part of the outer wall of the air guide cylinder is connected to the inner wall of the bearing cylinder via a plurality of connecting rods, a dust collecting cotton is arranged on the inner surface of the left side of the air guide cylinder, the left end of the air duct is located in the air guide cylinder, and the right end extends out of the air guide cylinder, the right end of the outer wall of the air duct is connected to the inner wall of the bearing cylinder via a connecting ring, and a dust collecting cotton is arranged on the left side of the connecting ring; a shielding door is arranged on the right wall of the operating room.

[0007] Furthermore, a partition is provided in the upper part of the operating room, through holes are evenly distributed on the partition, and the supporting cylinder is located on the upper side of the partition.

[0008] Furthermore, each lower part of the wall of the operating room is provided with an air outlet, and the air outlet holes and the through holes are circular holes with the same diameter, and the ratio of the number of the through holes to the air outlet holes is 1:0.8.

[0009] Furthermore, there is a distance between the left end of the air duct and the first dust-absorbing cotton, and there is a distance between the right end of the air guide tube and the second dust-absorbing cotton.

[0010] Furthermore, a door opening is provided on the right wall of the operating room, and the shielding door includes a circular plate, an arc-shaped plate and a door body; a circular plate is fixed in the middle of the top surface of the door opening, and arc-shaped plates are fixed at the front and rear ends of the bottom of the circular plate, the arc-shaped protrusions of the two arc-shaped plates are back to back, and the middle parts of the opposite side surfaces of the two arc-shaped plates are respectively fixedly connected to the front and rear ends of the door opening, a rotating rod is rotatably connected to the middle part of the bottom surface of the circular plate, and a door body is provided at the front and rear ends of the peripheral wall of the rotating rod, and the front door body is a cylinder with a wide front end, a narrow rear end, and a fan-shaped cross section, and the rear end of the door body is fixedly connected to the rotating rod, and the front end contacts the rear side of the front arc-shaped plate.

[0011] Furthermore, the corresponding central angles of the arc plate and door body 1 are both 90 degrees, the sum of the height of door body 1 and the thickness of the circular plate corresponds to the height of the door opening, the upper end of door body 1 slides in contact with the bottom surface of the circular plate, the height of the arc plate corresponds to the height of door body 1, and door body 2 is provided between the right ends of the two arc plates.

[0012] Through the above technical solution, the beneficial effects of the utility model are:

[0013] 1. The utility model introduces external air into the operating room through the fan, which can form a pressure greater than the external air pressure in the operating room, thereby forming a slight positive pressure in the operating room to prevent external dust from entering, and the air inlet filter can filter the air to make the air entering the operating room clean, thereby preventing external dust from entering the operating room, and thus improving the production quality of PCB boards.

[0014] 2. When the shielding door of the utility model is used for workers to enter and exit, the opening formed between the left ends of the two arc-shaped plates and the opening formed between the right ends remain in a blocked state, and the gas leakage in the operating room will not be caused by the workers entering and exiting the operating room. The operating room maintains a slight positive pressure, further preventing external dust from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a sectional front view of the utility model;

[0016] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0017] Figure 3 yes Figure 1 Sectional view at the middle BB;

[0018] Figure 4 yes Figure 1 Sectional view at CC;

[0019] Figure 5 It is a structural schematic diagram of the air guide tube connecting the connecting rod of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the air duct connection ring of the utility model;

[0021] Figure 7 It is a schematic diagram of the structure of the circular plate and the arc plate connected in the utility model;

[0022] Figure 8 It is a structural schematic diagram of the connection between a door body 1 and a rotating rod of the utility model.

[0023] The numbers in the attached drawings are: 1. operating room, 2. air outlet, 3. bearing cylinder, 4. filter, 5. air guide tube, 6. air duct, 7. fan, 8. connecting rod, 9. dust collecting cotton one, 10. dust collecting cotton two, 11. connecting ring, 12. partition, 13. through hole, 14. door opening, 15. round plate, 16. arc plate, 17. door body one, 18. rotating rod, 19. door body two, 20. hinge. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0025] like Figures 1 to 8 As shown, a dust prevention system for an operating room based on positive and negative pressure difference includes an operating room 1 and an air inlet; an air outlet 2 is provided at the lower part of the wall of the operating room 1, and an air inlet is provided at the upper part of the left wall of the operating room 1, and the air inlet includes a bearing cylinder 3, a filter screen 4, an air guide cylinder 5 and an air duct 6, the bearing cylinder 3 is a cylindrical body with left and right ends opened, the bearing cylinder 3 passes through and is fixedly connected to the left wall of the operating room 1, a fan 7 is provided in the middle part of the bearing cylinder 3, and a filter screen 4 is provided at the left end opening, an air guide cylinder 5 and an air duct 6 are provided in the bearing cylinder 3 on the right side of the fan 7, the air guide cylinder 5 is a cylindrical body with a closed left end and an open right end, and the outer diameter of the air guide cylinder 5 is less than The inner diameter of the bearing cylinder 3, the left part of the outer wall of the air guide cylinder 5 is connected to the inner wall of the bearing cylinder 3 through multiple connecting rods 8, the connecting rod 8 is a round rod, and the inner surface of the left side of the air guide cylinder 5 is provided with a dust-absorbing cotton 9, and the dust-absorbing cotton 9 is a circular sheet. The outer diameter of the air duct 6 is smaller than the inner diameter of the air guide cylinder 5, the left end of the air duct 6 is located in the air guide cylinder 5, and the right end extends out of the air guide cylinder 5. The right end of the outer wall of the air duct 6 is connected to the inner wall of the bearing cylinder 3 through a connecting ring 11, and the connecting ring is a circular ring. The left side of the connecting ring 11 is provided with a dust-absorbing cotton 2 10, and the dust-absorbing cotton 2 is a circular sheet. A shielding door is provided on the right wall of the operating room 1. When the shielding door is opened or closed, the air pressure in the operating room 1 is kept constant.

[0026] A partition 12 is provided in the upper part of the operating room 1 , and through holes 13 are evenly distributed on the partition 12 . The partition 12 is a rectangular plate whose side is fixedly connected to the inner side of the operating room 1 , and the supporting cylinder 3 is located on the upper side of the partition 12 .

[0027] Each lower part of the wall of the operation room 1 is provided with an air outlet 2, and the air outlet 2 and the through holes 13 are circular holes with the same diameter, and the ratio of the number of the through holes 13 to the air outlet 2 is 1:0.8.

[0028] There is a distance between the left end of the air duct 6 and the dust-absorbing cotton 1 9 , and there is a distance between the right end of the air guide tube 5 and the dust-absorbing cotton 2 10 .

[0029] An n-shaped door opening 14 is provided on the right wall of the operation room 1, and the upper end of the door opening 14 is lower than the partition 12. The shielding door includes a circular plate 15, an arc plate 16 and a door body 17. A circular plate 15 is fixed to the middle of the top surface of the door opening 14, and arc plates 16 are fixed to the front and rear ends of the bottom of the circular plate 15, and the two arc plates 16 are symmetrical front to back. The arc-shaped protrusions of the two arc plates 16 are back to back, and the middle parts of the back side surfaces of the two arc plates 16 are respectively fixedly connected to the front and rear faces of the door opening 14. A rotating rod 18 is rotatably connected to the middle part of the bottom surface of the circular plate 15, and the rotating rod is a round rod body. The front and rear ends of the peripheral walls of the rotating rod 18 are provided with door bodies 17, and the two door bodies 17 are symmetrical front to back. The front door body 17 is a column with a wide front end, a narrow rear end, and a fan-shaped cross section. The rear end of the door body 17 is fixedly connected to the rotating rod 18, and the front end contacts the rear side of the front arc plate 16.

[0030] The central angles corresponding to the arc plate 16 and the door body 17 are both 90 degrees, the sum of the height of the door body 17 and the thickness of the circular plate 15 matches the height of the door opening 14, the upper end of the door body 17 slides in contact with the bottom surface of the circular plate 15, the height of the arc plate 16 matches the height of the door body 17, and a door body 2 19 is provided between the right ends of the two arc plates 16. The door body 2 19 is an arc-shaped plate body, and the door body 2 19 is hinged to the right end of the arc plate on the rear side through a hinge 20. When the front end of the door body 2 19 contacts the right end of the front arc plate 16, the door body 2 19 and the arc plate 16 are on the same circular ring.

[0031] When in use, the fan 7 is started, and the external air enters the space on the upper side of the partition 12 through the supporting tube 3. Most of the dust in the air is intercepted by the filter 4. When the air enters the supporting tube 3 on the right side of the fan 7, the air flows to the right between the air guide tube 5 and the supporting tube 3. After the air is blocked by the connecting ring 11, it will flow to the left between the air duct 6 and the air guide tube 5. The dust in the air will collide with the dust collecting cotton 10 due to inertia. After the air between the air duct 6 and the air guide tube 5 is blocked by the left side plate of the air guide tube 5, it will enter the space on the upper side of the partition 12 through the air duct 6. The air flowing to the left between the air duct 6 and the air guide tube 5 The carried dust will collide with the dust collecting cotton 1 9 due to inertia. Therefore, the gas entering the space on the upper side of the partition 12 can be relatively clean after being filtered by the filter screen 4, the dust collecting cotton 1 9 and the dust collecting cotton 2 10; the gas in the space on the upper side of the partition 12 enters the operating room 1 on the lower side of the partition 12 through multiple through holes 13, and the gas in the operating room 1 flows out through the air outlet 2. Since the ratio of the number of through holes 13 to the air outlet 2 is 1:0.8, a slight positive pressure is formed in the operating room 1 on the lower side of the partition 12, and the gas pressure in the operating room 1 on the lower side of the partition 12 is greater than the gas pressure outside the operating room 1, which can prevent the entry of dust from the outside;

[0032] After the worker opens door body 2 19 and enters between the right parts of the two door bodies 17, he rotates door body 17 with the central axis of the rotating rod 18 as the rotation axis. When door body 17 rotates to between the left ends of the two arc-shaped plates 16, the worker can enter the operation room 1. During the rotation of door body 17, the opening formed between the left ends of the two arc-shaped plates 16 and the opening formed between the right ends remain in a blocked state during the rotation of the two door bodies 17. Similarly, when the worker leaves the operation room 1, the opening formed between the left ends of the two arc-shaped plates 16 and the opening formed between the right ends remain in a blocked state, thereby ensuring that the gas leakage in the operation room 1 will not occur due to the workers entering and exiting the operation room 1. A slight positive pressure is maintained in the operation room 1 to further prevent the entry of external dust. Closing door body 2 19 can prevent external dust from falling on door body 17.

[0033] The preferred implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the above-mentioned embodiments. Without violating the spirit of the present invention, i.e., the disclosure scope, any equivalent or equivalent deformation or replacement of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. An operating room dust prevention system based on positive and negative pressure difference, comprising an operating room (1), characterized in that: It also includes an air inlet component; an air outlet (2) is provided at the lower part of the wall of the operating room (1); an air inlet component is provided at the upper part of the left wall of the operating room (1); the air inlet component includes a bearing cylinder (3), a filter screen (4), an air guide cylinder (5) and an air duct (6); the bearing cylinder (3) penetrates through and is fixedly connected to the left wall of the operating room (1); a fan (7) is provided in the middle part of the bearing cylinder (3), and a filter screen (4) is provided at the left end opening; an air guide cylinder (5) and an air duct (6) are provided in the bearing cylinder (3) on the right side of the fan (7) The air guide tube (5) is a cylindrical body with a closed left end and an open right end. The left part of the outer wall of the air guide tube (5) is connected to the inner wall of the bearing tube (3) via a plurality of connecting rods (8). A dust collecting cotton (9) is provided on the inner surface of the left side of the air guide tube (5). The left end of the air duct (6) is located in the air guide tube (5) and the right end extends out of the air guide tube (5). The right end of the outer wall of the air duct (6) is connected to the inner wall of the bearing tube (3) via a connecting ring (11). A dust collecting cotton (10) is provided on the left side of the connecting ring (11). A shielding door is provided on the right wall of the operating room (1).

2. According to claim 1, a dust prevention system for operating rooms based on positive and negative pressure differences is characterized in that: A partition (12) is provided in the upper part of the operating room (1), through holes (13) are evenly distributed on the partition (12), and the supporting cylinder (3) is located on the upper side of the partition (12).

3. The dust prevention system for operating rooms based on positive and negative pressure differences according to claim 2 is characterized in that: Each lower part of the wall of the operating room (1) is provided with an air outlet hole (2), the air outlet hole (2) and the through hole (13) are both circular holes with the same diameter, and the ratio of the number of the through hole (13) to the air outlet hole (2) is 1:0.

8.

4. The dust prevention system for operating rooms based on positive and negative pressure differences according to claim 1 is characterized in that: There is a distance between the left end of the air duct (6) and the dust collecting cotton 1 (9), and there is a distance between the right end of the air guide tube (5) and the dust collecting cotton 2 (10).

5. The dust prevention system for operating rooms based on positive and negative pressure differences according to claim 1 is characterized in that: A door opening (14) is provided on the right wall of the operating room (1), and the shielding door comprises a circular plate (15), an arc-shaped plate (16) and a door body (17). A circular plate (15) is fixed in the middle of the top surface of the door opening (14), and arc-shaped plates (16) are fixed at the front and rear ends of the bottom of the circular plate (15). The arc-shaped protrusions of the two arc-shaped plates (16) are opposite to each other, and the middle parts of the opposite side surfaces of the two arc-shaped plates (16) are respectively fixedly connected to the front and rear ends of the door opening (14). A rotating rod (18) is rotatably connected to the middle part of the bottom surface of the circular plate (15), and the front and rear ends of the peripheral wall of the rotating rod (18) are provided with a door body (17). The front door body (17) is a column with a wide front end, a narrow rear end, and a fan-shaped cross section. The rear end of the door body (17) is fixedly connected to the rotating rod (18), and the front end contacts the rear side of the front arc-shaped plate (16).

6. The dust prevention system for operating rooms based on positive and negative pressure differences according to claim 5 is characterized in that: The central angles of the arc plate (16) and the door body (17) are both 90 degrees. The sum of the height of the door body (17) and the thickness of the circular plate (15) matches the height of the door opening (14). The upper end of the door body (17) slidably contacts the bottom surface of the circular plate (15). The height of the arc plate (16) matches the height of the door body (17). A door body (19) is provided between the right ends of the two arc plates (16).

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