Filter lattice structure for range hood

Abstract

The utility model discloses a filter lattice structure for a range hood. The filter lattice structure comprises an outer frame assembly, a filter element assembly and buffer cotton, the outer frame assembly is of an annular frame-shaped structure, and the filter element assembly is clamped on the inner side of the outer frame assembly; buffer cotton is arranged on the upper side and the lower side of the outer frame assembly. According to the utility model, the buffer cotton is additionally arranged on the upper side and the lower side of the outer frame assembly, and the elastic deformation capability of the buffer cotton is utilized to automatically fill an assembly gap between the outer frame and a sliding rail when the filter grid is arranged in the sliding rail of the air cabinet to form tight sealing. According to the design, a bypass channel for lampblack airflow is effectively blocked, the airflow is forced to completely pass through the interior of the filter element assembly, the problem of airflow short circuit caused by gaps in the prior art is thoroughly solved, and the lampblack filtering efficiency and capture rate are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of range hood accessories, and in particular to a filter grid structure for range hoods. Background Technology

[0002] The range hood filter is a key filtration component used in the ductwork of a range hood. It typically uses filter cotton or a metal mesh as the filter element to adsorb and filter grease and particulate matter from the cooking fumes. To facilitate user disassembly, cleaning, or filter element replacement, these filter elements are generally designed as drawer-style grid structures, sliding within the fan housing via rails. For example, the structure disclosed in patent number CN214597890U is a typical example of this design.

[0003] However, existing technologies have revealed a series of significant shortcomings in practical applications and testing:

[0004] 1. Poor sealing leads to low filtration efficiency: There are unavoidable gaps between the upper and lower sides of the filter frame and the mounting rail. Under negative pressure, the oil fume airflow can easily bypass the filter element inside the filter frame through these lateral gaps, forming a "short circuit" phenomenon. This results in a large amount of oil fume being discharged without effective filtration, severely weakening the overall filtration effect.

[0005] 2. Manufacturing defects leading to assembly and quality issues: Existing filter frames are mostly welded from multiple plates. The welding process inevitably causes thermal deformation, resulting in reduced frame flatness and dimensional accuracy. This not only makes assembly cumbersome, inefficient, and costly, but also directly increases the clearance between the frame and the slide rail, exacerbating the aforementioned air leakage problem. Furthermore, the inconsistent appearance of the welded joints affects the overall aesthetics of the product.

[0006] Therefore, further improvements are needed. Utility Model Content

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a filter grid structure for a range hood.

[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a filter grid structure for a range hood, including: an outer frame assembly, a filter element assembly, and buffer cotton;

[0009] The outer frame assembly has a ring-shaped structure, and the filter element assembly is sandwiched inside the outer frame assembly; the cushioning cotton is provided on the upper and lower sides of the outer frame assembly.

[0010] Optionally, the outer frame assembly has a rectangular frame structure, including frame beams and connecting corner brackets; the connecting corner brackets are located at the four corners of the outer frame assembly and are connected to the frame beams by connecting bolts.

[0011] Optionally, the frame beam is provided with a retaining rail; the connecting angle bracket is provided with a connecting lug; the connecting lug can be inserted into the retaining rail and locked to the frame beam by connecting bolts.

[0012] Optionally, a tension member is provided on the front side of the outer frame assembly; the tension member is locked between the connecting angle bracket and the frame beam by the connecting bolt; the tension member can be recessed and hidden in the retaining rail.

[0013] Optionally, the pulling element is a rope or cable.

[0014] Optionally, the outer periphery of the filter element assembly and the inner side of the outer frame assembly are coated with adhesive.

[0015] Optionally, the filter element assembly includes one or more of an activated carbon cotton layer, a non-woven fabric layer, and a honeycomb activated carbon layer.

[0016] Optionally, the filter element assembly is formed by stacking multiple layers of activated carbon cotton.

[0017] Optionally, the filter element assembly has metal wire mesh on both sides, which is pressed into a wavy arrangement.

[0018] The beneficial effects of this invention are as follows: Buffer cotton is added to the upper and lower sides of the outer frame assembly. Utilizing its elastic deformation capability, it automatically fills the assembly gap between the outer frame and the slide rail when the filter grid is installed into the air handling unit slide rail, forming a tight seal. This design effectively blocks the bypass channel of the oil fume airflow, forcing the airflow to completely pass through the interior of the filter element assembly, thoroughly solving the "airflow short-circuiting" problem caused by gaps in the prior art, and significantly improving the oil fume filtration efficiency and capture rate.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

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

[0022] Figure 2 for Figure 1 A front view of the filter grid structure;

[0023] Figure 3 for Figure 1 A cross-sectional view of the filter grid structure.

[0024] Explanation of key component symbols:

[0025] 10. Outer frame assembly; 11. Frame beam; 111. Rail; 12. Connecting angle bracket; 121. Connecting ear; 13. Connecting bolt; 14. Pulling component; 20. Filter element assembly; 21. Metal wire mesh; 30. Buffer cotton. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Example

[0031] Reference Figures 1 to 3 The present invention proposes a filter grid structure for a range hood, comprising: an outer frame assembly 10, a filter element assembly 20, and a buffer cotton 30;

[0032] The outer frame assembly 10 has an annular frame structure, and the filter element assembly 20 is sandwiched inside the outer frame assembly 10; cushioning cotton 30 is provided on the upper and lower sides of the outer frame assembly 10.

[0033] In this invention, buffer cotton 30 is added to the upper and lower sides of the outer frame assembly 10. Utilizing its elastic deformation capability, it automatically fills the assembly gap between the outer frame and the slide rail when the filter grid is installed into the air handling unit slide rail, forming a tight seal. This design effectively blocks the bypass channel of the oil fume airflow, forcing the airflow to completely pass through the interior of the filter element assembly 20, thoroughly solving the "airflow short-circuit" problem caused by gaps in the prior art, and significantly improving the oil fume filtration efficiency and capture rate.

[0034] In this embodiment, the outer frame assembly 10 has a rectangular frame structure, including frame beams 11 and connecting corner brackets 12. The connecting corner brackets 12 are located at the four corners of the outer frame assembly 10 and are connected to the frame beams 11 by connecting bolts 13. The outer frame adopts a modular design of "frame beams 11 + connecting corner brackets 12" and is assembled by connecting bolts 13, completely eliminating the traditional welding process. This eliminates the risk of welding thermal deformation, ensures the flatness and dimensional accuracy of the frame, and avoids the widening of the gap between the outer frame and the slide rail due to deformation. The split frame beams 11 and corner brackets can achieve standardized mass production, reducing the defect rate; the bolt connection facilitates disassembly, maintenance, or replacement of partially damaged parts, extending the service life.

[0035] In this embodiment, the frame beam 11 is provided with a retaining rail 111; the connecting corner bracket 12 is provided with a connecting lug 121; the connecting lug 121 can be inserted into the retaining rail 111 and locked to the frame beam 11 by connecting bolts 13. The frame beam 11 is pre-designed with the retaining rail 111 and the connecting corner bracket 12 with connecting lugs 121 to form a positioning and guiding structure. During assembly, the corner bracket connecting lug 121 can quickly be inserted into the retaining rail 111 to achieve pre-positioning, and then locked by bolts. This greatly improves assembly efficiency, while ensuring the consistency of the four corner connection positions, avoiding manual alignment errors, and further ensuring the overall dimensional accuracy of the outer frame.

[0036] In this embodiment, a pull member 14 is provided on the front side of the outer frame assembly 10; the pull member 14 is locked between the connecting bracket 12 and the frame beam 11 by the connecting bolt 13; the pull member 14 can be recessed and hidden in the retaining rail 111. The pull member 14 is locked between the bracket and the frame beam 11 by the connecting bolt 13 and can be hidden inside the retaining rail 111. The user's pull-out operation is more effortless and avoids contact with oil stains by bare hands; the hidden design does not occupy external space and maintains a simple appearance.

[0037] Specifically, the traction component 14 is made of flexible materials such as ropes or cables, which are not easy to scratch users and are resistant to oil and corrosion.

[0038] In this embodiment, the outer periphery of the filter element assembly 20 and the inner side of the outer frame assembly 10 are coated with adhesive. This fills the microscopic gaps between the filter element and the outer frame, preventing unfiltered airflow from leaking from the sides; it also enhances the structural stability of the filter element, avoids vibration displacement, and improves sealing reliability and filtration consistency.

[0039] In this embodiment, the filter element assembly 20 includes one or more of the following: an activated carbon cotton layer, a non-woven fabric layer, and a honeycomb activated carbon layer. The filter element can be flexibly configured according to the concentration and composition of the oil fumes to specifically improve the oil capture rate or odor removal capability.

[0040] Preferably, the filter element assembly 20 is formed by stacking multiple layers of activated carbon cotton. The filter element is composed of multiple layers of activated carbon cotton, and the multi-layer structure significantly increases the surface area for oil adsorption. The multi-stage filtration improves the capture efficiency of small particulate pollutants and slows down the saturation rate of the filter element.

[0041] In this embodiment, metal wire mesh 21 is provided on both sides of the filter element assembly 20 and is arranged in a wavy pattern. The metal wire mesh 21 provides rigid support for the filter element, prevents the filter cotton from collapsing and deforming, and ensures uniform airflow. The wavy arrangement increases the effective filtration area of ​​the filter element, reduces wind resistance, and balances high filtration efficiency with low noise operation.

[0042] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A filter grid structure for a range hood, characterized in that, Includes: outer frame assembly (10), filter element assembly (20), and cushioning cotton (30); The outer frame assembly (10) has an annular frame structure, and the filter element assembly (20) is sandwiched inside the outer frame assembly (10); the buffer cotton (30) is provided on the upper and lower sides of the outer frame assembly (10).

2. The filter grid structure for a range hood according to claim 1, characterized in that: The outer frame assembly (10) has a rectangular frame structure, including a frame beam (11) and a connecting corner bracket (12); the connecting corner bracket (12) is located at the four corners of the outer frame assembly (10) and is connected to the frame beam (11) by connecting bolts (13).

3. The filter grid structure for a range hood according to claim 2, characterized in that: The frame beam (11) is provided with a retaining rail (111); the connecting bracket (12) is provided with a connecting ear (121); the connecting ear (121) can be inserted into the retaining rail (111) and locked to the frame beam (11) by a connecting bolt (13).

4. The filter grid structure for a range hood according to claim 3, characterized in that: The front side of the outer frame assembly (10) is provided with a tension member (14); the tension member (14) is locked between the connecting angle bracket (12) and the frame beam (11) by the connecting bolt (13); the tension member (14) can be inserted into and hidden in the locking rail (111).

5. The filter grid structure for a range hood according to claim 4, characterized in that: The pulling component (14) is a rope or cable.

6. The filter grid structure for a range hood according to claim 1, characterized in that: The outer periphery of the filter element assembly (20) and the inner side of the outer frame assembly (10) are coated with adhesive.

7. The filter grid structure for a range hood according to claim 1, characterized in that: The filter element assembly (20) includes one or more of the following: activated carbon cotton layer, non-woven fabric layer, and honeycomb activated carbon layer.

8. The filter grid structure for a range hood according to claim 1, characterized in that: The filter element assembly (20) is formed by stacking multiple layers of activated carbon cotton.

9. The filter grid structure for a range hood according to claim 1, characterized in that: The filter element assembly (20) has metal wire mesh (21) on both sides, which is pressed into a wavy arrangement.

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