Ventilation device for purifying clean room

Abstract

The invention relates to the technical field of clean room ventilation, in particular to a ventilation device for clean room purification, which comprises a ventilation pipe, a filter assembly for separating impurities in the air is arranged in the ventilation pipe, a pollution discharge assembly for continuously discharging the impurities is arranged on one side of the ventilation pipe, a surface air cooler is arranged on the top of the filter assembly, and the surface air cooler is arranged on the other side of the ventilation pipe. The filtering assembly is composed of a ventilation part and a flow guide part. According to the ventilation device for purifying the clean room, the surface air cooler is used for capturing moisture in air, so that the moisture is condensed into water drops and drips into the liquid storage cavity; when outside air passes through the bottom of the isolation cover, bubbles can be formed in the condensate water, the air and the condensate water are fully mixed, then solid particles in the air are intercepted, and air purification is achieved. Meanwhile, the surface air cooler can dehumidify air, condensate water can be directly used as a filter medium, and compared with a traditional clean room air supply system, the clean room air supply system does not need to depend on a filter material filter, and the maintenance cost is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of cleanroom ventilation technology, specifically to a ventilation device for cleanroom purification. Background Technology

[0002] Cleanrooms are used in industrial production where environmental requirements are high. A direct-flow cleanroom (also called a fresh air cleanroom) is a special design that does not recirculate air and relies entirely on external fresh air to maintain cleanliness. It is suitable for occasions with high pollution risk or strict prevention of cross-contamination.

[0003] Existing direct-flow cleanrooms utilize multiple cartridge filters to perform tiered filtration of external air, followed by dehumidification via a surface cooler. The purified air is then delivered into the cleanroom by a turbine fan to achieve the required cleanliness level. However, existing cartridge filters require maintenance through replacement or cleaning after a period of use. Filter replacement increases production costs, and production needs to be stopped during filter maintenance, thus reducing production efficiency. Therefore, we propose a ventilation device for cleanroom purification. Summary of the Invention

[0004] The purpose of this invention is to provide a ventilation device for cleanroom purification, addressing the problems mentioned in the background art regarding the need for regular maintenance and replacement of filter media in existing cleanroom air supply systems, which increases production costs and requires production shutdowns during maintenance, thus affecting production efficiency. To achieve the above objective, this invention provides the following technical solution: a ventilation device for cleanroom purification, comprising a ventilation duct, an internal filter assembly for separating impurities in the air, a drain assembly for continuously discharging impurities on one side of the ventilation duct, a surface cooler on the top of the filter assembly, and the filter assembly consisting of a ventilation section and a flow guide section. The ventilation section includes a side frame fixedly connected to the inner wall of the ventilation duct, a sealing ring fitted on the outer wall of the side frame, a ramp fixedly connected to the top of the sealing ring, and a flow guide shroud fixedly connected to the top of the ramp.

[0005] More preferably, the flow guide includes fixing blocks that are fixedly connected to two inner walls of the ventilation pipe respectively. An isolation cover is fixedly connected to the opposite side of the fixing blocks. The bottom of the isolation cover is fitted onto the top of the flow guide cover. A top cover is fixedly connected to the top of the isolation cover. A liquid storage cavity is formed between the outer wall of the flow guide cover and the inner wall of the ventilation pipe.

[0006] More preferably, the sewage discharge assembly consists of a connecting part and an anti-deposition part. The connecting part includes a connecting pipe fixedly connected to one side of the ventilation pipe. The end of the connecting pipe away from the ventilation pipe is fixedly connected to a tank. The top of the outer wall of the tank away from the ventilation pipe is fixedly connected to a drain pipe, and the opening of the drain pipe is slightly lower than the top of the guide shroud.

[0007] More preferably, the anti-deposition part includes a connecting plate fixedly connected to the bottom of the tank, a drive motor fixedly connected to the bottom of the connecting plate, a rotating shaft fixedly connected to the output shaft end of the drive motor, one end of the rotating shaft completely penetrating the connecting plate and extending into the interior of the tank, and an auger fixedly connected to the outer wall of the rotating shaft located inside the tank.

[0008] More preferably, a connector is fixedly connected to the side of the ventilation pipe near the tank body, a connecting rod is fixedly connected to the side of the connector near the tank body, and a clamp is fixedly connected to the end of the connecting rod near the tank body, with the clamp fitted onto the outer wall of the tank body.

[0009] More preferably, the surface cooler consists of a support connection part and a retaining part. The support connection part includes a first flange fixedly connected to the top, a second flange fixedly connected to the top of the first flange, and a frame fixedly connected to the bottom of the second flange.

[0010] More preferably, the interception section includes a plurality of copper tubes arranged in a serpentine pattern from top to bottom, and a plurality of fins arranged in a linear array are fixedly connected between the inner walls of opposite sides of the frame. One end of each copper tube passes through both sides of the frame and the plurality of fins in sequence, and the copper tubes are fixedly connected to the frame. One end of the plurality of copper tubes on the same side is connected to a main pipe, and both main pipes pass through a ventilation pipe.

[0011] More preferably, the top of the second flange is fixedly connected to an extension duct, and the top of the extension duct is connected to the air outlet of the clean room via a turbine fan.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a surface cooler to capture moisture in the air, causing it to condense into water droplets that fall into a storage chamber. When external air passes through the bottom of the isolation cover, bubbles form in the condensate, allowing the air and condensate to mix thoroughly, thereby trapping solid particles in the air and achieving air purification. Simultaneously, the surface cooler also dehumidifies the air, and the condensate can directly serve as a filter medium. Compared to traditional cleanroom air supply systems, it eliminates the need for filter media, effectively reducing maintenance costs.

[0013] This invention uses a drain assembly to connect the liquid storage chamber and the tank. A sufficient height difference between the drain pipe and the connecting pipe creates a water seal, preventing airflow from flowing back into the ventilation duct through the tank. A drive motor rotates the auger, preventing solid particles from settling in the condensate. During condensate accumulation, overflowing condensate carries solid particles through the drain pipe, effectively preventing blockage of the connecting pipe by deposited solid particles. This enables self-cleaning of the air filtration process, requiring no additional maintenance. Compared to traditional cleanroom air supply systems, this eliminates the need for regular maintenance, solves the problem of production downtime for maintenance, and improves production efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the present invention; Figure 3 This is a schematic diagram of the surface cooler structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle; Figure 6 For the present invention Figure 4 Schematic diagram of the structure at point B; Figure 7 This is a schematic diagram showing the position of the water level line h in this invention; Figure 8 This is a schematic cross-sectional view of the surface cooler structure of the present invention.

[0015] In the diagram: 1. Ventilation duct; 2. Fixing block; 3. Side frame; 4. Tank body; 5. Connecting piece; 6. Second flange; 11. First flange; 12. Extension duct; 21. Isolation cover; 22. Top cover; 31. Sealing ring; 32. Inclined platform; 33. Flow guide; 41. Connecting pipe; 42. Connecting plate; 43. Drive motor; 44. Rotating shaft; 45. Screwdriver; 46. Drain pipe; 51. Connecting rod; 52. Clamp; 61. Frame; 62. Copper pipe; 63. Main pipe; 64. Fin. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-8Figure 1 shows that the present invention provides a technical solution: a ventilation device for cleanroom purification, including a ventilation pipe 1, a filter assembly for separating impurities in the air is provided inside the ventilation pipe 1, a sewage discharge assembly for continuously discharging impurities is provided on one side of the ventilation pipe 1, a surface cooler is provided on the top of the filter assembly, the filter assembly is composed of a ventilation section and a flow guide section, the ventilation section includes a side frame 3 fixedly connected to the inner wall of the ventilation pipe 1, a sealing ring 31 for sealing is fitted on the outer wall of the side frame 3, a ramp 32 is fixedly connected to the top of the sealing ring 31, and a flow guide hood 33 is fixedly connected to the top of the ramp 32; Ventilation duct 1 uses a turbine fan to make airflow flow from bottom to top; Filter components are used to filter solid particles in the air that are formed due to factors such as production and human activity; Liquid water needs to be pre-filled between the inner wall of the ventilation duct 1 and the outer wall of the guide shroud 33, and an isolation coating should be applied to the parts of the guide shroud 33 and the ventilation duct 1 that are submerged or in contact with the liquid water to prevent corrosion. The inclined ramp 32 is used to allow deposited impurities to converge downwards along the slope of the ramp 32, so that the deposited impurities are guided into the sewage discharge component. When humid air flows through the surface cooler, the temperature of the chilled water inside the pipes is lower than the dew point temperature of the air. Water vapor in the air forms water droplets on the surface cooler, thus dehumidifying the air. The water droplets fall into the filter assembly, eliminating the need for additional water supply during subsequent filtration. The surface cooler captures moisture from the air and uses the condensate to continuously replenish the water supply to the filter assembly, eliminating the need for additional water supply, reducing maintenance, and making it environmentally friendly.

[0018] In this embodiment, as Figure 4 and Figure 6 As shown, the flow guide includes fixing blocks 2 that are fixedly connected to the two inner walls of the ventilation pipe 1 respectively. An isolation cover 21 is fixedly connected to the opposite side of the fixing blocks 2. The bottom of the isolation cover 21 is fitted onto the top of the flow guide cover 33. A top cover 22 is fixedly connected to the top of the isolation cover 21. A liquid storage cavity is formed between the outer wall of the flow guide cover 33 and the inner wall of the ventilation pipe 1. The top of the top cover 22 is triangular, and a U-shaped connecting channel is formed between the outer wall of the flow guide 33 and the inner wall of the top cover 22, as well as between the inner wall of the ventilation pipe 1 and the outer wall of the top cover 22. Under the action of the turbine fan, the airflow flows from bottom to top inside the guide shroud 33, and finally passes through the U-shaped connecting channel. The water level will submerge part of the U-shaped connecting channel. Since the condensate submerges the bottom of the isolation shroud 21, the airflow will be fully mixed with the condensate when it passes through the bottom of the isolation shroud 21, forming fine foam, which greatly increases the contact area between water and air. As the bubbles rise in the liquid, they will adsorb dirt and achieve cleaning through impact, compression and shearing. The condensate traps solid particles in the airflow through physical means, thereby achieving a filtration effect and being more environmentally friendly.

[0019] In this embodiment, as Figure 1 , Figure 4 and Figure 7 As shown, the sewage discharge assembly consists of a connecting part and an anti-deposition part. The connecting part includes a connecting pipe 41 fixedly connected to one side of the ventilation pipe 1. The end of the connecting pipe 41 away from the ventilation pipe 1 is fixedly connected to the tank body 4. The top of the outer wall of the tank body 4 away from the ventilation pipe 1 is fixedly connected to a drain pipe 46, and the opening of the drain pipe 46 is slightly lower than the top of the guide hood 33. The connection point between the connecting pipe 41 and the ventilation pipe 1 is located on the lowest side of the inclined platform 32; The liquid storage chamber is connected to the inside of the tank 4 through the connecting pipe 41. Utilizing the principle of communicating vessels, the drain pipe 46, which is located below the top of the guide shroud 33, is the lowest point. After the condensate enters the liquid storage chamber, excess condensate overflows through the drain pipe 46, keeping the water level in the liquid storage chamber constant and preventing condensate from flowing back into the guide shroud 33.

[0020] In this embodiment, as Figure 1 , Figure 4 and Figure 7 As shown, the anti-deposition part includes a connecting plate 42 fixedly connected to the bottom of the tank body 4. A drive motor 43 is fixedly connected to the bottom of the connecting plate 42. A rotating shaft 44 is fixedly connected to the output shaft end of the drive motor 43. One end of the rotating shaft 44 completely penetrates the connecting plate 42 and extends into the interior of the tank body 4. An auger 45 is fixedly connected to the outer wall of the rotating shaft 44 located inside the tank body 4. An O-ring is fitted on the outer wall of the rotating shaft 44 to form a seal between the rotating shaft 44 and the bottom of the tank body 4, and the rotating shaft 44 is rotatably connected to the bottom of the tank body 4 and the connecting plate 42. The height difference between the drain pipe 46 and the connecting pipe 41 is large enough to form a water seal inside the tank 4; when the turbine fan draws airflow inside the ventilation pipe 1, the water seal can prevent external air from flowing back into the ventilation pipe 1 through the drain pipe 46 and inside the tank 4. Solid particles in the impurities tend to gradually settle to the bottom of the tank 4, and long-term use may cause the sediment to clog the connecting pipe 41. By driving the auger 45 to rotate by the drive motor 43, the condensate in the tank 4 can be stirred to prevent the solid particles from settling. During the continuous replenishment of condensate, the condensate will carry the solid particles out through the drain pipe 46, thereby avoiding the connection pipe 41 from being blocked by the settling of solid particles.

[0021] In this embodiment, as Figure 1 , Figure 2 and Figure 4 As shown, a connector 5 is fixedly connected to the side of the ventilation pipe 1 near the tank 4, a connecting rod 51 is fixedly connected to the side of the connector 5 near the tank 4, and a clamp 52 is fixedly connected to the end of the connecting rod 51 near the tank 4, and the clamp 52 is sleeved on the outer wall of the tank 4. The clamp 52 consists of two semi-circular ring structures. One of the semi-circular ring structures is fixedly connected to the connecting rod 51. The two semi-circular ring structures are fixedly connected by bolts to form a complete ring clamp 52. The two semi-circular ring structures are tightened by bolts so that the two semi-circular ring structures clamp and fix the tank 4 and provide stable support for the tank 4.

[0022] In this embodiment, as Figure 1 , Figure 2 and Figure 7 As shown, the surface cooler consists of a support connection part and a trapping part. The support connection part includes a first flange 11 fixedly connected to the top, a second flange 6 fixedly connected to the top of the first flange 11, and a frame 61 fixedly connected to the bottom of the second flange 6. The second flange 6 is fixedly connected to the first flange 11 by bolts, and the second flange 6 extends into the ventilation pipe 1 through the top of the ventilation pipe 1, and forms a connection seal with the first flange 11 through the second flange 6.

[0023] In this embodiment, as Figure 2 , Figure 3 and Figure 8 As shown, the interception section includes multiple copper tubes 62 arranged in a serpentine pattern from top to bottom. Multiple fins 64 arranged in a linear array are fixedly connected between the inner walls of opposite sides of the frame 61. One end of the copper tubes 62 passes through both sides of the frame 61 and multiple fins 64 in sequence. The copper tubes 62 are fixedly connected to the frame 61. One end of multiple copper tubes 62 on the same side is connected to a main pipe 63. Both main pipes 63 pass through the ventilation pipe 1. Both main pipes 63 are fitted with rubber and plastic insulation sleeves, and the two main pipes 63 are fixedly connected to the input and output ends of the refrigeration mechanism, respectively.

[0024] In this embodiment, as Figure 1 , Figure 2 and Figure 4As shown, the top of the second flange 6 is fixedly connected to an extension duct 12, and the top of the extension duct 12 is connected to the air outlet of the clean room through a turbine fan. The top of the extension duct 12 is connected to the output end of the turbine fan, and the output end of the turbine fan is distributed to multiple air outlets of the clean room through the duct.

[0025] The method of use and advantages of the present invention: The ventilation device for cleanroom purification operates as follows: In use, the turbine fan directs the air delivered by the extended duct 12 into the distribution duct, and then the air is delivered to the clean room through the distribution duct. The ventilation duct 1 is placed outside the clean room. Then, clean liquid water is pre-injected into the tank 4 through the drain pipe 46 until the liquid water overflows from the drain pipe 46. Then, the refrigeration mechanism is started. After the required refrigeration temperature is reached, the turbine fan and drive motor 43 are started. When the turbine fan is working, external air enters the guide shroud 33 through the ventilation pipe 1 under negative pressure. Then the air flows from top to bottom between the inner wall of the isolation shroud 21 and the outer wall of the guide shroud 33. Because there is liquid water between the outer wall of the isolation cover 21 and the ventilation pipe 1, when the air passes around the bottom of the isolation cover 21, bubbles are formed in the liquid water between the outer wall of the isolation cover 21 and the ventilation pipe 1, so that the air and the liquid water are fully mixed and contacted, thereby allowing the liquid water to trap solid particles such as dust in the air. Solid particles gradually sink downwards under the influence of gravity, and gradually sink into the connecting pipe 41 through the inclined platform 32; After the air is purified by the liquid water remaining between the outer wall of the isolation cover 21 and the ventilation pipe 1, the purified air flows upward and passes through the surface cooler. The air comes into contact with the fins 64 on the surface cooler, and the gaseous water in the airflow condenses into water droplets when it encounters the cold air. As water droplets accumulate and form larger droplets, they eventually drip onto the top cover 22 and slide down the slope of the top cover 22 to the space between the outer wall of the isolation cover 21 and the ventilation pipe 1, continuously replenishing the liquid storage chamber with liquid water. As the liquid water increases, it flows from the liquid storage chamber to the tank 4, carrying sediment into the tank 4 through the connecting pipe 41. When sediment and excess liquid water enter the tank 4, the drive motor 43 drives the auger 45 to rotate, which can prevent solid particles from settling and make them fully mixed with the liquid water. As the liquid water gradually accumulates, the liquid water mixed with solid particles will overflow through the drain pipe 46, achieving a continuous self-cleaning effect.

Claims

1. A ventilation device for cleanroom purification, characterized in that, The system includes a ventilation duct (1), inside which a filter assembly for separating impurities in the air is provided, and on one side of the ventilation duct (1) a sewage discharge assembly for continuously discharging impurities is provided. A surface cooler is provided on the top of the filter assembly. The filter assembly consists of a ventilation section and a flow guide section. The ventilation section includes a side frame (3) fixedly connected to the inner wall of the ventilation duct (1). A sealing ring (31) for sealing is fitted on the outer wall of the side frame (3). A ramp (32) is fixedly connected to the top of the sealing ring (31). A flow guide shroud (33) is fixedly connected to the top of the ramp (32).

2. A ventilation device for cleanroom purification according to claim 1, characterized in that: The flow guide includes two fixing blocks (2) that are fixedly connected to the inner walls of the ventilation pipe (1). An isolation cover (21) is fixedly connected to the opposite side of the fixing blocks (2). The bottom of the isolation cover (21) is fitted onto the top of the flow guide cover (33). A top cover (22) is fixedly connected to the top of the isolation cover (21). A liquid storage cavity is formed between the outer wall of the flow guide cover (33) and the inner wall of the ventilation pipe (1).

3. A ventilation device for cleanroom purification according to claim 2, characterized in that: The sewage discharge assembly consists of a connecting part and an anti-deposition part. The connecting part includes a connecting pipe (41) fixedly connected to one side of the ventilation pipe (1). The end of the connecting pipe (41) away from the ventilation pipe (1) is fixedly connected to a tank (4). The top of the outer wall of the tank (4) away from the ventilation pipe (1) is fixedly connected to a drain pipe (46), and the opening of the drain pipe (46) is slightly lower than the top of the guide shroud (33).

4. A ventilation device for cleanroom purification according to claim 3, characterized in that: The anti-deposition part includes a connecting plate (42) fixedly connected to the bottom of the tank (4). A drive motor (43) is fixedly connected to the bottom of the connecting plate (42). A rotating shaft (44) is fixedly connected to the output shaft end of the drive motor (43). One end of the rotating shaft (44) completely penetrates the connecting plate (42) and extends into the interior of the tank (4). An auger (45) is fixedly connected to the outer wall of the rotating shaft (44) located inside the tank (4).

5. A ventilation device for cleanroom purification according to claim 4, characterized in that: The ventilation pipe (1) is fixedly connected to a connector (5) on the side near the tank (4), and a connecting rod (51) is fixedly connected to the side of the connector (5) near the tank (4). A clamp (52) is fixedly connected to the end of the connecting rod (51) near the tank (4), and the clamp (52) is sleeved on the outer wall of the tank (4).

6. A ventilation device for cleanroom purification according to claim 5, characterized in that: The surface cooler consists of a support connection part and a retaining part. The support connection part includes a first flange (11) fixedly connected to the top, a second flange (6) fixedly connected to the top of the first flange (11), and a frame (61) fixedly connected to the bottom of the second flange (6).

7. A ventilation device for cleanroom purification according to claim 6, characterized in that: The interception section includes multiple copper tubes (62) arranged in a serpentine pattern from top to bottom. Multiple fins (64) arranged in a linear array are fixedly connected between the inner walls of opposite sides of the frame (61). One end of the copper tube (62) passes through both sides of the frame (61) and multiple fins (64) in sequence. The copper tube (62) is fixedly connected to the frame (61). One end of multiple copper tubes (62) on the same side is connected to a main pipe (63). Both main pipes (63) pass through the ventilation pipe (1).

8. A ventilation device for cleanroom purification according to claim 7, characterized in that: The top of the second flange (6) is fixedly connected to an extension duct (12), and the top of the extension duct (12) is connected to the air outlet of the clean room through a turbine fan.

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