A guide frame for an air inlet of a fan

Abstract

The utility model provides a guide frame for fan air inlet belongs to mechanical technical field, it solved the problem that current fan guide frame stability is poor. The guide frame for fan air inlet includes: frame body, is set up to rectangle, frame body is surrounded by four side plates, each side plate is bent and extends to form the upper flanging, each side plate is bent and extends to form the lower flanging, each lower flanging is connected with fan, main support strip is set to two, two main support strips are respectively set between two opposite upper flanging, two main support strips are set mutually perpendicularly, and the middle part of two main support strips is equipped with first rivet, auxiliary support strip is set to a plurality of, each auxiliary support strip is set around two main support strips, and the both ends of every auxiliary support strip are all respectively with upper flanging fixed connection. The utility model has the characteristics that stability is good.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a guide frame for a fan inlet, particularly a guide frame with good stability for a fan inlet. Background Technology

[0002] A fan filter unit (FFU) is an air purification device widely used in cleanrooms, clean production lines, laboratories, medical facilities, and other fields. Its main function is to purify the air by passing it through a filter using airflow generated by a fan. In actual installation, it can be ceiling-mounted or placed on a floor-standing bracket to achieve a localized Class 100 cleanroom air quality level. It can also be used for terminal air supply in cleanrooms.

[0003] The FFU (Fan Filter Unit) mainly consists of three parts: a fan, a filter, and a housing. It typically employs a two-stage filtration system: a pre-filter and a high-efficiency filter. During operation, the fan generates airflow, drawing air into the unit. The air first passes through a pre-filter to remove larger particles; then it enters a high-efficiency filter to remove fine particles and harmful substances such as bacteria; finally, the treated air is delivered into the room by the fan, completing the air purification process.

[0004] In the pre-filtration stage, the air inlet is typically equipped with a guide frame, which is covered with pre-filter cotton. Air enters the pre-filtration device evenly under the guidance of the fan, reducing the generation of eddies and vortices. Existing guide frames usually have support strips on their end faces, using four support strips in a grid structure. However, the intersecting support strips are not fixed and are suspended. As a result, when the FFU fan is running, the support strips sway relative to each other under the influence of airflow, causing the pre-filter cotton attached to the guide frame to move, thus reducing the filtration effect of the pre-filtration stage. This also affects air resistance and can easily lead to various adverse effects.

[0005] In addition, there is usually no specific connection structure between the guide frame and the fan, and the guide frame and the fan are prone to loosening, which poses a risk of air leakage during operation and leads to a decrease in fan efficiency.

[0006] In summary, to address the shortcomings of existing fan guide frame structures, this utility model designs a reasonably structured and stable guide frame for fan inlets. Summary of the Invention

[0007] To address the problems existing in the prior art, this utility model provides a guide frame for the air inlet of a fan that has a reasonable structure and good stability.

[0008] The objective of this utility model can be achieved through the following technical solution: a guide frame for the air inlet of a fan, comprising:

[0009] The frame body is rectangular. The frame body is formed by enclosing four side plates. Each side plate is bent upwards to extend to form an upward flanging, and each side plate is bent downwards to extend to form a downward flanging. Each downward flanging is connected to the fan.

[0010] There are two main support bars. The two main support bars are respectively arranged across between two opposite upward flangings. The two main support bars are perpendicular to each other, and a first rivet is passed through the middle of the two main support bars.

[0011] There are multiple auxiliary support bars. Each auxiliary support bar is arranged around the two main support bars, and both ends of each auxiliary support bar are respectively fixedly connected to the upward flanging.

[0012] As a further improvement of this case, the auxiliary support bars are set to four, and each auxiliary support bar is located between two adjacent ends of the two main support bars.

[0013] As a further step improvement of this case, both ends of each support bar are respectively fixedly connected to the upward flanging through a second rivet, and a plurality of installation holes corresponding to each second rivet one by one are penetrated and opened in the middle of each upward flanging.

[0014] As a further improvement of this case, a plurality of magic tapes are covered along each upward flanging, and each magic tape is arranged in an "L" shape.

[0015] As a further step improvement of this case, a sealing strip is also arranged between the frame body and the fan. The sealing strip is closely fitted along the downward flanging, and the sealing strip is arranged in a "return" shape.

[0016] As a further improvement of this case, a plurality of positioning holes are evenly opened along the downward flanging, and a screw is arranged in each positioning hole.

[0017] Compared with the prior art, the structure of the utility model is reasonably arranged. Through the cooperative arrangement between the main support bars, the auxiliary support bars and the upward flangings of the frame body, the overall structural strength and stability of the frame body are enhanced, which is beneficial to the stable use of the primary filter cotton; the form of rivet installation is convenient for installation on the one hand, and can further ensure the connection stability between each component on the other hand; in addition, the setting of the sealing gasket is convenient for strengthening the sealing between the diversion frame and the fan, which is beneficial to improving the air filtration efficiency. Brief Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is Figure 1 a partial exploded structural schematic diagram of

[0020] Figure 3 It is a structural schematic diagram of the frame body in the utility model.

[0021] In the diagram, 10 is the frame; 11 is the upper flange; 12 is the lower flange; 13 is the mounting hole; 14 is the positioning hole; 15 is the Velcro; 16 is the sealing strip; 21 is the main support strip; 22 is the auxiliary support strip; 31 is the first rivet; 32 is the second rivet; and 33 is the screw. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0023] like Figures 1 to 3 As shown, the guide frame used for the air inlet of the fan includes:

[0024] The frame 10 is rectangular and is formed by four side panels. Each side panel bends upward to form an upper flange 11 and each side panel bends downward to form a lower flange 12. Each lower flange 12 is connected to the fan.

[0025] Two main support bars 21 are provided, which are respectively straddled between two opposite upper flanges 11. The two main support bars 21 are perpendicular to each other, and a first rivet 31 is passed through the middle of the two main support bars 21.

[0026] Multiple auxiliary support bars 22 are provided, each auxiliary support bar 22 is arranged around two main support bars 21, and both ends of each auxiliary support bar 22 are fixedly connected to the upper flange 11.

[0027] Given that existing guide frames typically use four support bars in a grid pattern on the end face, but the intersecting support bars are not fixed and are suspended, the support bars will sway against each other under the action of airflow when the FFU fan is running. This causes the primary filter cotton attached to the guide frame to sway, thereby reducing the filtration effect of the pre-filtration stage and also affecting the air resistance, which can easily lead to a variety of adverse effects.

[0028] In addition, there is usually no specific connection structure between the guide frame and the fan, and the guide frame and the fan are prone to loosening, which poses a risk of air leakage during operation and leads to a decrease in fan efficiency.

[0029] Therefore, this utility model provides a guide frame for the air inlet of a fan. Through the cooperation between the main support bar 21, the auxiliary support bar 22 and the upper flange 11 of the frame 10, the overall structural strength and stability of the frame 10 are enhanced, which is conducive to the stable use of the primary filter cotton. The use of rivet installation facilitates installation and further ensures the stability of the connection between various components. In addition, the lower flange 12 of the guide frame is connected to the fan, ensuring a stable connection between the guide frame and the fan, which is conducive to the air purification work.

[0030] Specifically, in this embodiment, the four side plates of the frame 10 are preferably bent upwards and downwards to form an upper flange 11 and a lower flange 12, which facilitates the installation of support bars, etc., and also facilitates the connection between the guide frame and the fan. In actual production, the upper flange 11 and the lower flange 12 can also be a one-piece structure, which can be fixedly connected to the frame 10.

[0031] Preferably, two sets of support bars are provided here. Two main support bars 21 are arranged in a cross shape in the middle of the frame 10, and the remaining auxiliary support bars 22 are arranged around the two main support bars 21 to form a stable structure, which helps to ensure the overall structural stability of the guide frame. The two main support bars 21 are fixedly connected in the middle by a first rivet 31 to ensure a firm connection between the two main support bars 21 and prevent shaking under the action of airflow.

[0032] Preferably, there are four auxiliary support bars 22, each of which is located between the two adjacent ends of two main support bars 21.

[0033] In this embodiment, four auxiliary support bars 22 are preferably provided, and the four auxiliary support bars 22 are respectively located between the four ends of the two main support bars 21. It is worth mentioning that each auxiliary support bar 22 is located between the two adjacent ends of the two main support bars 21. That is, the two adjacent half-sections of the two main support bars 21 and the corresponding auxiliary support bars 22 form a triangular structure, which further enhances the structural stability of the frame 10 and ensures that the frame 10 remains stable under the action of airflow.

[0034] Furthermore, each support bar is fixed to the upper flange 11 at both ends by a second rivet 32, and a plurality of mounting holes 13 corresponding to each second rivet 32 ​​are provided through the middle of each upper flange 11.

[0035] The auxiliary support bar 22 forms a triangular structure between the two main support bars 21 corresponding to it. Figure 1 It can be seen that two auxiliary support bars 22 are symmetrically installed on both sides of the end of each main support bar 21. It is preferable to open three mounting holes 13 in the middle of each upper flange 11, corresponding to the three support bars, which also facilitates the rivets to pass down through the support bars for press riveting connection.

[0036] Preferably, multiple Velcro straps 15 are provided along each upper flange 11, and each Velcro strap 15 is arranged in an "L" shape. The arrangement of the Velcro straps 15 facilitates the subsequent installation of the primary filter cotton. Here, it is preferable that the width of the Velcro straps 15 matches the width of the upper flange 11, and the "L" shape of the Velcro straps 15 facilitates adaptation to the corners of the upper flange 11, while avoiding the aforementioned second rivets 32, thus facilitating installation. In actual use, the Velcro straps 15 can also adopt a multi-segment splicing structure, which is not limited here.

[0037] Furthermore, a sealing strip 16 is provided between the frame 10 and the fan. The sealing strip 16 fits tightly along the lower flange 12 and is arranged in a "U" shape. The sealing strip 16 ensures the airtightness between the guide frame and the fan, preventing air leakage during operation and thus ensuring the efficiency of air purification.

[0038] Preferably, a plurality of positioning holes 14 are evenly provided along the lower flange 12, and a screw 33 is provided in each positioning hole 14.

[0039] In this embodiment, screws 33 are preferably provided on the lower flange 12. The screws 33 pass through the positioning hole 14 and further through the sealing gasket to connect with the fan, which enhances the installation stability between the guide frame and the fan and facilitates the air purification process. The number of positioning holes 14 and screws 33 can be determined according to actual needs and is not limited here.

[0040] In this embodiment, a support bar design is adopted in which the two main support bars 21 in the middle intersect in a cross shape, and the four auxiliary support bars 22 around the perimeter form a triangular support structure. This design can ensure that the filter cotton still has good support strength when a large air volume is introduced, while ensuring stable air resistance. In addition, the lower flange 12 of the guide frame is provided with positioning holes 14 and screws 33, which facilitates the stable positioning and installation between the guide frame and the fan, and improves the connection stability between the bottom of the guide frame and the fan.

[0041] The air guide frame structure used for the fan inlet is reasonably designed. Through the cooperation between the main support bar 21, the auxiliary support bar 22 and the upper flange 11 of the frame 10, the overall structural strength and stability of the frame 10 are enhanced, which is conducive to the stable use of the primary filter cotton. The use of rivet installation not only facilitates installation, but also further ensures the stability of the connection between various components. In addition, the setting of the sealing gasket helps to enhance the sealing between the air guide frame and the fan, which is conducive to improving air filtration efficiency.

[0042] The embodiments described herein are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or additions to the specific embodiments described, or substitutions made by those skilled in the art, should be covered within the scope of protection of the present invention.

Claims

1. A guide frame for an air inlet of a fan, the guide frame comprising: Comprising: A frame body, which is rectangularly arranged. The frame body is surrounded by four side plates. Each side plate is bent upward to form an upward turned edge, and each side plate is bent downward to form a downward turned edge. Each downward turned edge is connected to a fan; Two main support bars, which are arranged in two. The two main support bars are respectively arranged across between two opposite upward turned edges. The two main support bars are perpendicularly arranged, and a first rivet is inserted through the middle parts of the two main support bars; A plurality of auxiliary support bars, which are arranged around the two main support bars. The two ends of each auxiliary support bar are respectively fixedly connected to the upward turned edges.

2. The wind guide frame for the air inlet of a fan according to claim 1, wherein, The auxiliary support bars are arranged in four. Each auxiliary support bar is located between two adjacent ends of the two main support bars.

3. The guide frame for the air inlet of a fan according to claim 1 or 2, characterized in that, Both ends of each support bar are respectively fixedly connected to the upward turned edge through a second rivet. A plurality of mounting holes corresponding to each second rivet are respectively penetrated through the middle parts of each upward turned edge.

4. The wind guide frame for the air inlet of a fan according to claim 1, wherein, A plurality of magic tapes are arranged along each upward turned edge. Each magic tape is arranged in an "L" shape.

5. A guide frame for a fan inlet according to claim 1, characterized in that, A sealing strip is further arranged between the frame body and the fan. The sealing strip is closely adhered along the downward turned edge, and the sealing strip is arranged in a "return" shape.

6. A guide frame for a fan inlet according to claim 1, characterized in that, A plurality of positioning holes are uniformly opened along the downward turned edge. A screw is arranged in each positioning hole.

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