Fan filter unit and fresh air system

Abstract

The utility model relates to a fan filter unit and a fresh air system, comprising: a box body, which defines a filter space and is provided with a first air duct port and a second air duct port communicated with the filter space; the filtering piece is connected to the first air duct opening of the box body in a sealed mode; and the fan module comprises a fixing plate, a control unit, a fan and a gasket, the gasket is arranged on the peripheral side of the second air duct opening, and the fixing plate is connected to the second air duct opening of the box body in a sealed mode through the gasket. By means of the arrangement, the fan and the controller are integrated to the fixing plate, the fixing plate is detachably matched with the gasket to be connected to the second air duct opening in a sealed mode, interference of a box body is avoided when the fan is maintained and replaced, and the fan is more convenient and faster to maintain and replace.

Description

Technical Field

[0001] This utility model relates to the field of filter units, and in particular to a fan filter unit and a fresh air system. Background Technology

[0002] FFU (Fan Filter Unit) refers to a fan filter unit, which is widely used in cleanrooms, dust-free rooms, clean workshops and other dust-free environments. EFU (Equipment Fan Filter Unit) refers to an equipment fan filter unit, which is a self-powered air purification device with filtration function, usually installed at the top end of the equipment as an air supply device.

[0003] Most existing FFU purification units are sheet metal structures with the fan inside the housing. During installation, the filter is placed first, then the fan is placed on the filter, and then the housing is assembled and sealed. This makes it inconvenient to replace and repair the fan. The existing EFU purification unit has a similar structure to the FFU purification unit and is installed on the room's joists, which also presents the problem of inconvenience when repairing the fan. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the inconvenience of replacing and repairing fans in the prior art, thereby providing a fan filter unit and a fresh air system.

[0005] To solve the above-mentioned technical problems, this utility model provides a fan filter unit, comprising:

[0006] The housing encloses a filtration space, and the housing is provided with a first air duct opening and a second air duct opening that are connected to the filtration space.

[0007] The filter element is sealed to the first air duct opening of the housing;

[0008] The fan module includes: a fixed plate, a control unit, a fan, and a gasket. The gasket is disposed around the second air duct opening. The fixed plate is sealed to the second air duct opening of the housing through the gasket. The fixed plate is detachably disposed in the housing. The control unit and the fan are both disposed on the fixed plate. The fixed plate has a ventilation opening that communicates with the fan air duct.

[0009] In one embodiment of the present invention, the housing is provided with a first limiting plate and a second limiting plate, the distance between the first limiting plate and the second limiting plate being adapted to the thickness of the filter element, and the filter element being sealed to the first limiting plate and / or the second limiting plate.

[0010] In one embodiment of this utility model, the filter element is provided with a flow guide groove, the first limiting plate is disposed on the side of the filter element near the second air duct opening of the housing, and two stop portions extend from both sides of the first limiting plate toward the second air duct opening of the housing. The two stop portions extend toward each other with limiting portions, and the first limiting plate, the stop portions and the limiting portions enclose a receiving cavity. The two ends of the flow guide groove are respectively connected to the receiving cavity and the filtration space.

[0011] In one embodiment of the present invention, the housing has a support plate extending on the side near the second air duct opening, the support plate is located within the filtration space, and a stepped surface is formed between the support plate and the inner wall of the housing.

[0012] In one embodiment of this utility model, the gasket is disposed on the support plate, the height of the gasket and the fixing plate is adapted to the height of the step surface, and there is a gap between the output end of the fan and the filter element.

[0013] In one embodiment of this utility model, the vent is provided with a filter cover, the fan corresponds to the filter cover, the fixing plate is also provided with a power interface, the input end of the power interface is electrically connected to the outside, and the output end of the power interface passes through the fixing plate and is electrically connected to the control unit and the fan respectively.

[0014] In one embodiment of the present invention, the fixing plate extends to one side of the filter space with a plurality of first studs, the plurality of first studs passing through the housing of the fan, and the ends of the first studs are threaded with nuts.

[0015] In one embodiment of the present invention, the fixing plate is provided with a plurality of second studs, the second studs passing through the fixing plate and the washer and extending to the support plate, and the second studs are threadedly connected to the support plate.

[0016] In one embodiment of this utility model, the dimensions of the fixing plate and the second air duct opening are equal to the cross-sectional dimensions of the filter space.

[0017] This utility model also provides a fresh air system, including the above-mentioned fan filter unit.

[0018] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0019] The present invention discloses a fan filter unit in which the filter element and the housing are integrated into a single module. This integrated design effectively avoids leakage problems caused by the separate structure of the filter and the frame. The fixing plate is sealed to the second air duct opening with a gasket. Air enters the fan duct through the ventilation opening, is filtered by the filter element, and is then discharged, thus ensuring the directionality and stability of the airflow. The periphery of the filter element is integrally connected to the housing to ensure sealing and prevent leakage from the frame. This avoids leakage problems caused by the separate structure of the filter element and the frame. By integrating the fan and controller into the fixing plate and making the fixing plate detachably and sealed to the second air duct opening with the gasket, there is no interference from the housing when maintaining or replacing the fan, making it more convenient and faster. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of the filter unit of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the fixing plate and the fan of this utility model;

[0023] Figure 3 This is a cross-sectional view of the filter unit of this utility model;

[0024] Figure 4 This is a utility model Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is an exploded view of the filter unit of this utility model;

[0026] Figure 6 This is a partial schematic diagram of the gasket and support plate of this utility model.

[0027] Explanation of reference numerals in the accompanying drawings: 1. Housing; 2. Nameplate; 3. Fixing plate; 4. Ventilation opening; 5. Filter cover; 6. Power interface; 7. Knob; 8. Second stud; 9. Controller; 10. First stud; 11. Nut; 12. Fan; 13. First air duct opening; 14. First limiting plate; 15. Second limiting plate; 151. Stop; 152. Limiting part; 16. Filter element; 17. Second air duct opening; 18. Guide groove; 19. Gasket; 20. Support plate; 21. Stepped surface. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0029] Example 1

[0030] Reference Figures 1-6 As shown,

[0031] The present invention relates to a fan 12 filter unit, comprising:

[0032] The housing 1 encloses a filtration space, and the housing 1 is respectively provided with a first air duct 13 and a second air duct 17 communicating with the filtration space.

[0033] Filter element 16 is sealed to the first air duct opening 13 of the housing 1;

[0034] The fan 12 module includes: a fixing plate 3, a control unit, a fan 12, and a gasket 19. The gasket 19 is disposed around the second air duct opening 17. The fixing plate 3 is sealed to the second air duct opening 17 of the housing 1 through the gasket 19. The fixing plate 3 is detachably disposed on the housing 1. The control unit and the fan 12 are both disposed on the fixing plate 3. The fixing plate 3 has a ventilation opening 4 that communicates with the air duct of the fan 12.

[0035] The present invention discloses a fan 12 filter unit. The fan 12 draws air from the filter space into the fan 12 duct through the ventilation port 4 and accelerates the air out. The fan 12 causes the external air to be filtered to enter the filter space through the second duct port 17 of the housing 1. The filter element 16 is sealed and connected to the first duct port 13, so that the air is purified by the filter element 16 in the filter space and then discharged from the first duct port 13. The filter element 16 can effectively remove impurities and pollutants from the air. Specifically, since the fixed plate 3 is sealed to the second air duct opening 17 through the gasket 19, air enters the air duct of the fan 12 through the vent 4, thereby ensuring the directionality and stability of the airflow. The periphery of the filter element 16 is integrally connected with the housing 1 to ensure the sealing and prevent leakage from the frame. This avoids leakage problems caused by the separate structure of the filter element 16 and the frame. By integrating the fan 12 and the controller 9 into the fixed plate 3 and making the fixed plate 3 detachably and sealed to the second air duct opening 17 with the gasket 19, there is no interference from the housing 1 when repairing or replacing the fan 12, which is more convenient and faster.

[0036] The housing 1 is provided with a first limiting plate 14 and a second limiting plate 15. The distance between the first limiting plate 14 and the second limiting plate 15 is adapted to the thickness of the filter element 16. The filter element 16 is sealed to the first limiting plate 14 and / or the second limiting plate 15, i.e., the inner wall of the housing 1. First, the filter element 16 is placed inside the housing 1. Since the distance between the first limiting plate 14 and the second limiting plate 15 is adapted to the thickness of the filter element 16, the filter element 16 can be placed between the two limiting plates to achieve precise positioning. The filter element 16 is sealed to the first limiting plate 14, the second limiting plate 15 and the inner wall of the housing 1, so air cannot leak from the connection between the filter element 16 and the limiting plate and is filtered through the filter element 16.

[0037] Reference Figures 3-4 As shown, the filter element 16 has a guide groove 18. The first limiting plate 14 is disposed on the side of the filter element 16 near the second air duct opening 17 of the housing 1. Two stop portions 151 extend from both sides of the first limiting plate 14 toward the second air duct opening 17 of the housing 1. The two stop portions 151 extend toward each other with limiting portions 152. The first limiting plate 14, the stop portions 151 and the limiting portions 152 enclose a receiving cavity. The two ends of the guide groove 18 are respectively connected to the receiving cavity and the filter space. Impurities within the chamber pass through the guide channel 18. The opening width of the receiving cavity is the distance between the two limiting parts 152 in each group, allowing impurities to be collected within the receiving cavity, reducing the clogging time of the filter element 16 and extending its service life. This eliminates the need to disassemble and clean the filter element 16, facilitating its integration with the housing 1 and improving sealing. Specifically, after installation, sealant is filled into the gaps between the filter element 16 and the first limiting plate 14 and the second limiting plate 15. In this embodiment, the guide channel 18 is inclined and passes through the stop part 151.

[0038] Reference Figure 6As shown, the housing 1 has a support plate 20 extending from the side near the second air duct opening 17. The support plate 20 is located within the filtration space, and a stepped surface 21 is formed between the support plate 20 and the inner wall of the housing 1. The gasket 19 in the fan 12 module can be placed on the support plate 20. The surface of the support plate 20 is flat, which allows the gasket 19 to be evenly stressed, ensuring a tight fit between the gasket 19 and the support plate 20. The stepped surface 21 serves a positioning function. When the fixing plate 3 of the fan 12 module is sealed to the second air duct opening 17 of the housing 1 via the gasket 19, the stepped surface 21 serves as a positioning reference, enabling the fixing plate 3 to be accurately installed in the predetermined position and avoiding installation deviation. At the same time, the stepped surface 21 also assists in sealing. During operation of the fan 12 filter unit, air flows within the filtration space. The stepped surface 21 and related components of the fan 12 module fit tightly together, forming a localized labyrinth seal. This effectively prevents air leakage from the gaps between the housing 1 and the fan 12 module, ensuring that air flows along a predetermined path: entering from the first air duct 13, being filtered by the filter element 16, and then exiting through the fan 12 module from the second air duct 17. This improves the sealing performance and airflow stability of the fan 12 filter unit, thereby enhancing the overall performance of the unit.

[0039] Reference Figure 6 As shown, the gasket 19 is disposed on the support plate 20. The height of the gasket 19 and the fixing plate 3 is adapted to the height of the step surface 21, so that the surface of the fixing plate 3 is flush with the outer surface of the housing 1. There is a gap between the output end of the fan 12 and the filter element 16, which provides a reasonable channel for air flow and avoids friction and collision problems caused by the fan 12 output end and the filter element 16 being too close.

[0040] Reference Figure 2 As shown, the vent 4 is equipped with a filter cover 5, and the fan 12 corresponds to the filter cover 5. The fixing plate 3 is also equipped with a power interface 6. The input end of the power interface 6 is electrically connected to the outside, and the output end of the power interface 6 passes through the fixing plate 3 and is electrically connected to the control unit and the fan 12 respectively. Air passes through the filter cover 5 of the vent 4. The filter cover 5 can prevent foreign objects from entering the fan 12 and causing damage to the impeller. The power interface 6 introduces electricity into the unit. The output end of the power interface 6 supplies power to the control unit and the fan 12 respectively through the line passing through the fixing plate 3. After receiving power, the control unit begins to monitor and control the operating status of the fan 12, for example, adjusting the speed of the fan 12 according to preset parameters to adapt to different airflow requirements. After receiving a stable power supply, the fan 12 operates according to the instructions of the control unit, continuously providing power for the airflow.

[0041] Reference Figure 2As shown, the fixing plate 3 extends towards the filtration space with multiple first studs 10. These first studs 10 pass through the housing of the fan 12. Nuts 11 are threaded onto the ends of the first studs 10. The fan 12 is placed on the fixing plate 3, aligning the first studs 10 with the mounting holes on the fan 12 housing, and the first studs 10 are passed through the mounting holes. Nuts 11 are then screwed onto the ends of the first studs 10 and gradually tightened. Tightening the nuts 11 gradually increases the pressure between the nuts 11 and the fan 12 housing, firmly fixing the fan 12 housing to the fixing plate 3.

[0042] Reference Figure 5 As shown, the fixing plate 3 is provided with a plurality of second studs 8. The second studs 8 pass through the fixing plate 3 and the washer 19 and extend to the support plate 20. The second studs 8 are threadedly connected to the support plate 20. The washer 19 is placed on the support plate 20, and the fixing plate 3 together with the fan 12 module is placed above the washer 19. The second studs 8 on the fixing plate 3 are aligned with the corresponding holes on the washer 19 and the support plate 20, so that the second studs 8 gradually pass through the fixing plate 3 and the washer 19 and are screwed into the threaded holes on the support plate 20. The tightening of the second studs 8 tightly connects the fixing plate 3, the washer 19 and the support plate 20 together to form a stable structure.

[0043] In this embodiment, the first air duct opening 13 and the second air duct opening 17 can be used as an air inlet and an air outlet, respectively, i.e., negative pressure suction filtration; alternatively, the air ducts can be reversed, serving as an air outlet and an air inlet, respectively, i.e., positive pressure blowing filtration. The choice depends on the actual usage environment. In some embodiments... Figure 3 Taking the first air duct 13 as the air outlet and the second air duct 17 as the air inlet as an example, when filtered air is blown into the filtration space, larger impurities enter the receiving cavity from the inner side of the filter element 16, i.e., the side near the fan 12, along the guide groove 18 and through the stop portion 151 of the first limiting plate 14. Since the filter element 16 is made of porous material, the opening of the stop portion 151 is the air inlet of the receiving cavity, and the opening between the extensions is the air outlet, facilitating the flow of impurities into the receiving cavity. In this embodiment, the structures of the second limiting plate 15 and the first limiting plate 14 are symmetrical along the airflow direction. The first air duct 13 and the second air duct 17 can serve as the air inlet and air outlet, respectively. The guide groove 18 is opened on the outer side of the filter element 16, i.e., the side away from the fan 12, to accommodate impurities on the outer side. That is, impurities are always collected on the air inlet side of the filter element 16, improving the service life of the filter element 16, and the guide groove 18 is arc-shaped. In some embodiments, the middle portion of the filter element 16 on the air inlet side protrudes from the periphery to form a tapered surface, causing impurities to accumulate on the periphery.

[0044] The dimensions of the fixing plate 3 and the second air duct opening 17 are equal to the cross-sectional dimensions of the filter space, which facilitates the installation of the fixing plate 3 and reduces the structural complexity of the housing 1. The outer wall of the housing 1 is provided with a nameplate 2 for identifying the unit parameters. The controller 9 also includes a control knob 7.

[0045] Example 2

[0046] This embodiment provides a fresh air system, including a fan 12 filter unit as described in Embodiment 1.

[0047] The fresh air system provided in this embodiment includes multiple sets of fans 12 and filter units. The multiple sets of filter units are connected in series or in parallel through fresh air ducts and are respectively connected to the room to be cleaned and the outside, thereby purifying the air in the clean room.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A fan filter unit, characterized in that, include: The housing encloses a filtration space, and the housing is provided with a first air duct opening and a second air duct opening that are connected to the filtration space. The filter element is sealed to the first air duct opening of the housing; The fan module includes: a fixed plate, a control unit, a fan, and a gasket. The gasket is disposed around the second air duct opening. The fixed plate is sealed to the second air duct opening of the housing through the gasket. The fixed plate is detachably disposed in the housing. The control unit and the fan are both disposed on the fixed plate. The fixed plate has a ventilation opening that communicates with the fan air duct.

2. The fan filter unit according to claim 1, characterized in that: The housing is provided with a first limiting plate and a second limiting plate. The distance between the first limiting plate and the second limiting plate is adapted to the thickness of the filter element. The filter element is sealed to the first limiting plate and / or the second limiting plate.

3. A fan filter unit according to claim 2, characterized in that: The filter element has a flow guide groove. The first limiting plate is located on the side of the filter element near the second air duct opening of the housing. Two stop portions extend from both sides of the first limiting plate toward the second air duct opening of the housing. The two stop portions extend toward each other and have limiting portions. The first limiting plate, the stop portions, and the limiting portions enclose a receiving cavity. The two ends of the flow guide groove are respectively connected to the receiving cavity and the filter space.

4. A fan filter unit according to claim 1, characterized in that: The housing has a support plate extending from the side near the second air duct opening. The support plate is located within the filtration space, and a stepped surface is formed between the support plate and the inner wall of the housing.

5. A fan filter unit according to claim 1, characterized in that: The gasket is disposed on the support plate, and the height of the gasket and the fixing plate is adapted to the height of the step surface. There is a gap between the output end of the fan and the filter element.

6. A fan filter unit according to claim 1, characterized in that: The vent is equipped with a filter cover, the fan corresponds to the filter cover, and the fixing plate is also equipped with a power interface. The input end of the power interface is electrically connected to the outside, and the output end of the power interface passes through the fixing plate and is electrically connected to the control unit and the fan respectively.

7. A fan filter unit according to claim 1, characterized in that: The fixing plate extends toward the side of the filtration space with a plurality of first studs, which pass through the housing of the fan, and the ends of the first studs are threaded with nuts.

8. A fan filter unit according to claim 1, characterized in that: The fixing plate is provided with a plurality of second studs, which pass through the fixing plate and the washer and extend to the support plate, and are threadedly connected to the support plate.

9. A fan filter unit according to claim 1, characterized in that: The dimensions of the fixed plate and the second air duct opening are equal to the cross-sectional dimensions of the filtration space.

10. A fresh air system, characterized in that, Includes a fan filter unit as described in any one of claims 1-9.

Images