General multi-grade air filter air inlet fixing frame

Abstract

This utility model discloses a universal multi-stage air filter inlet mounting bracket, belonging to the field of air filtration equipment installation technology. It includes a side plate, upper and lower plates, a cover plate, and a stepped slide. The stepped slide is a multi-step structure formed by bending a single piece of steel plate, with perforated flanges at both ends. The flanges are fixedly fitted to the side plate. The bottom of the stepped slide is fixed to the upper and lower plates. Sealant is applied to the contact surfaces of the side plate and the stepped slide, as well as the gaps between the side plate and the upper and lower plates. A second sealing cotton strip is centrally attached to the back of the cover plate, and a first sealing cotton strip is attached to the four edges of the mounting bracket. This universal multi-stage air filter inlet mounting bracket solves the problems of numerous, incompatible, and poorly sealing brackets in the prior art. It achieves standardization and universality of mounting brackets, reduces the variety of types, and improves sealing performance through structural design, enabling external filters to achieve effects close to those of internal filters.

Description

Technical Field

[0001] This utility model belongs to the field of air filtration equipment installation technology, specifically relating to a universal multi-level air filter inlet fixing bracket. Background Technology

[0002] In existing technologies, installing air filters at the air inlet end of ducts or air conditioning units is an economical and effective method. Fixtures are mainly divided into two types: frame-type and pull-out type. Frame-type fixtures are less commonly used at the air inlet end because personnel must stand on the air inlet side during installation and maintenance, making it impossible to connect to the duct. Pull-out type has become the mainstream. However, pull-out fixtures are limited by the width of the filter, requiring the design of various models according to the type and grade of the filter, resulting in a wide variety of fixtures that are not interchangeable. When filters need to be used in combination, multiple fixtures are usually connected in series or extra-large fixtures are used with internal pull-out cables, which is inconvenient for use and adjustment. Furthermore, existing pull-out fixtures, as independent external structures, have poor sealing performance, often requiring additional filter devices to be installed inside the unit or duct, increasing cost and installation complexity. Utility Model Content

[0003] The purpose of this utility model is to provide a universal multi-level air filter inlet mounting bracket to solve the problems mentioned in the background art, such as the wide variety of mounting brackets, their lack of interoperability, and their poor sealing effect.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a universal multi-level air filter inlet fixing bracket, including a side plate, upper and lower plates, a cover plate, and a stepped slide. The stepped slide is a multi-step structure formed by bending a single piece of steel plate, with perforated flanges at both ends. The flanges are fixedly fitted with the side plate. The bottom of the stepped slide is fixed to the upper and lower plates. Sealant is applied to the contact surfaces of the side plate and the stepped slide, as well as the gaps between the side plate and the upper and lower plates. A second sealing cotton strip is pasted in the center of the back of the cover plate. The filter is pressed tightly by the cover plate and the second sealing cotton strip. A first sealing cotton strip is pasted around the perimeter of the fixing bracket.

[0005] In a further embodiment, the number of steps and the types of filters accommodated by the stepped slide are divided into basic type and formal type. The basic type can accommodate nylon mesh filter / ultra-thin pre-filter, plate pre-filter, bag pre-filter / bag medium-efficiency filter, and a combination of nylon mesh / ultra-thin pre-filter and bag pre-filter / bag medium-efficiency filter.

[0006] In a further embodiment, the formal type can accommodate nylon mesh filters / ultra-thin pre-filters, panel pre-filters, panel medium-efficiency filters, Type 75 electronic electrostatic filters, bag pre-filters / bag medium-efficiency filters, as well as combinations of nylon mesh filters / ultra-thin pre-filters and bag pre-filters / bag medium-efficiency filters, and combinations of panel pre-filters and bag medium-efficiency filters.

[0007] In a further embodiment, the perforated flanges at both ends of the stepped slide are fixed to the side plates with bolts, and the bottom is fixed to the upper and lower plates with rivet nuts to ensure accurate positioning of the slide edge and the whole.

[0008] In a further embodiment, the second sealing strip is made of elastic material and is pasted to the center of the back of the cover plate. After being tightened with bolts, it fits tightly against the edge of the filter to form a seal.

[0009] In a further embodiment, the sealing cotton strip is continuously pasted along the four sides of the fixing frame, with a width consistent with the width of the frame, and when installed at the air inlet, it seals with the edge of the air inlet.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] This universal multi-level air filter inlet mounting bracket, through its multi-step structure with stepped slides, can accommodate filters of different thicknesses, enabling the combined installation of various filters, greatly reducing the types of mounting brackets and lowering production and usage costs.

[0012] By using a reasonable combination of sealant, sealing cotton strip one, and sealing cotton strip two, the problem of insufficient bypass rate is effectively solved, making the sealing effect of the external fixing frame close to that of the built-in filter device, eliminating the need to install an additional filter device inside the machine / pipe.

[0013] With a reasonable structural design and clear assembly steps, it is easy to install and maintain, improving work efficiency. At the same time, the filters are divided into basic and advanced types, which can be selected according to product positioning and actual needs to meet the filtration requirements of different scenarios. The universal multi-level air filter inlet mounting bracket solves the problems of numerous types of mounting brackets, incompatibility and poor sealing effect in the existing technology, realizes the standardization and universality of mounting brackets, reduces the types, and improves the sealing performance through structural design, so that the external filter can achieve a near-internal filter effect. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is the front view of the air inlet of this utility model;

[0016] Figure 2 This is a front view of the cover plate and sealing cotton strip of this utility model;

[0017] Figure 3 This is a side view of the basic filter of this utility model;

[0018] Figure 4 This is a side view of the formal filter of this utility model;

[0019] Figure 5 This is a side view of the stepped slide of this utility model;

[0020] Figure 6 This is a top view of the stepped slide of this utility model in its unfolded state.

[0021] In the diagram: 1. Side panel; 2. Top and bottom panels; 3. Sealing strip one; 4. Cover plate; 5. Stepped slide; 6. Sealing strip two. Detailed Implementation

[0022] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0023] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0024] This utility model provides, for example Figure 1-6The universal multi-stage air filter inlet mounting bracket shown includes a side plate 1, upper and lower plates 2, a cover plate 4, and a stepped slide 5. The stepped slide 5 is a multi-step structure formed by bending a single piece of steel plate. It has perforated flanges at both ends, which are fixedly fitted with the side plate 1. The bottom is fixed with the upper and lower plates 2. The perforated flanges at both ends of the stepped slide 5 are fixed with the side plate 1 by bolts. The bottom of the stepped slide 5 is fixed with the upper and lower plates 2 by rivet nuts, ensuring accurate positioning of the slide edge and the whole.

[0025] Sealant is applied to the joints between the side panel 1 and the stepped slide 5, and between the side panel 1 and the upper and lower panels 2. After the sealant cures, it forms a continuous sealing layer to prevent airflow from leaking through the structural gaps. Sealing strip 2 6 is pasted in the center of the back of the cover plate 4. Before pasting, the back of the cover plate 4 is cleaned to ensure a firm bond. The filter is pressed by the cover plate 4 and sealing strip 2 6. Sealing strip 2 6 is an elastic material and is pasted in the center of the back of the cover plate 4. After being tightened with bolts, it fits tightly with the edge of the filter to form a seal. Sealing strip 1 3 with the same width as the side is pasted on the four sides of the frame. Sealing strip 1 3 is pasted continuously along the four sides of the frame and the width is consistent with the side width. When installed at the air inlet, it seals with the edge of the air inlet. The corners are spliced ​​at a 45° angle to avoid sealing blind spots. When installed at the air inlet, it is squeezed with the flange to form an interface seal.

[0026] The number of steps and the types of filters that the stepped slide 5 can accommodate are divided into basic type and formal type. The basic type can accommodate nylon mesh filter / ultra-thin pre-filter, plate pre-filter, bag pre-filter / bag medium-efficiency filter, as well as a combination of nylon mesh / ultra-thin pre-filter and bag pre-filter / bag medium-efficiency filter.

[0027] The standard type can accommodate nylon mesh filters / ultra-thin pre-filters, panel pre-filters, panel medium-efficiency filters, Type 75 electronic electrostatic filters, bag pre-filters / bag medium-efficiency filters, as well as combinations of nylon mesh filters / ultra-thin pre-filters and bag pre-filters / bag medium-efficiency filters, and combinations of panel pre-filters and bag medium-efficiency filters.

[0028] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Working principle:

[0031] This universal multi-level air filter inlet mounting bracket uses a stepped slide 5 formed by bending a single piece of steel plate. The height of its multi-steps is precisely matched to filters of different thicknesses (e.g., 5mm step for nylon mesh, 25mm for plate pre-filters, and 200mm for bag filters). The filter is positioned by inserting it into the corresponding step along the slide. A single bracket can be used to install multiple filters (e.g., a basic nylon mesh filter and a bag filter in series) without the need for additional supports. The sealing system forms a structural seal by applying sealant to the mating surfaces of the side plate 1 and the slide / upper and lower plates 2. The elastic sealing strip 6 on the back of the cover plate 4 presses the filter edge, and the sealing strip 3 on the four sides of the frame squeezes against the inlet flange. This triple seal blocks the airflow bypass path. The basic and formal types are adapted to different filtration needs by the difference in the number of steps (4 steps / 7 steps). The formal type adds steps to accommodate electronic electrostatic filters, achieving full-level filtration compatibility from pre-filters to medium-efficiency filters. The sealing effect of the external mounting bracket is close to that of the internal device. It is suitable for air ducts or air conditioning unit inlets in industrial and commercial scenarios.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A universal multi-stage air filter inlet mounting bracket, comprising a side plate (1), upper and lower plates (2), a cover plate (4), and a stepped slide (5), characterized in that: The stepped slide (5) is a multi-step structure formed by bending a whole steel plate. It has perforated flanges at both ends, which are fixedly fitted with the side plate (1). The bottom of the stepped slide (5) is fixed with the upper and lower plates (2). The gaps between the side plate (1) and the stepped slide (5) and between the side plate (1) and the upper and lower plates (2) are coated with sealant. The back of the cover plate (4) is pasted with sealing cotton strip two (6). The filter is pressed by the cover plate (4) and sealing cotton strip two (6). The frame of the fixing frame is pasted with sealing cotton strip one (3).

2. The universal multi-stage air filter inlet mounting bracket according to claim 1, characterized in that: The number of steps and the types of filters accommodated by the stepped slide (5) are divided into basic type and formal type. The basic type can accommodate nylon mesh filter / ultra-thin pre-filter, plate pre-filter, bag pre-filter / bag medium-efficiency filter, and combination of nylon mesh / ultra-thin pre-filter and bag pre-filter / bag medium-efficiency filter.

3. The universal multi-stage air filter inlet mounting bracket according to claim 2, characterized in that: The standard type can accommodate nylon mesh filters / ultra-thin pre-filters, panel pre-filters, panel medium-efficiency filters, Type 75 electronic electrostatic filters, bag pre-filters / bag medium-efficiency filters, as well as combinations of nylon mesh filters / ultra-thin pre-filters and bag pre-filters / bag medium-efficiency filters, and combinations of panel pre-filters and bag medium-efficiency filters.

4. The universal multi-stage air filter inlet mounting bracket according to claim 1, characterized in that: The perforated flanges at both ends of the stepped slide (5) are fixed to the side plate (1) by bolts, and the bottom is fixed to the upper and lower plates (2) by rivet nuts to ensure accurate positioning of the slide edge and the whole.

5. The universal multi-stage air filter inlet mounting bracket according to claim 1, characterized in that: The sealing cotton strip 2 (6) is made of elastic material and is pasted on the back of the cover plate (4) in the center position. After being tightened with bolts, it fits tightly with the edge of the filter to form a seal.

6. The universal multi-stage air filter inlet mounting bracket according to claim 1, characterized in that: The sealing cotton strip (3) is continuously pasted along the four sides of the fixed frame, with the width being consistent with the width of the frame. When installed at the air inlet, it seals with the edge of the air inlet.

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