A fireproof filter screen structure for a smoke machine

Abstract

A kind of fire filter grid structure for smoke machine, comprising: outer frame assembly, filter core assembly and buffer cotton;Outer frame assembly is annular frame structure, filter core assembly is clamped in the inside of outer frame assembly;Upper side, lower side and the side of outer frame assembly are provided with buffer cotton;The outside of filter core assembly is provided with fireproof steel wire mesh layer of dense hole structure.The utility model, buffer cotton is compressed and fills the gap between outer frame and slide rail, avoids that oil fume flow is short-circuited around filter core from side gap, ensures that oil smoke must pass through filter core assembly filtering, significantly improves filtering efficiency.At the same time, the outside of filter core assembly is provided with dense hole structure fireproof steel wire mesh layer, can effectively block the direct contact of open fire filter core, prevent active carbon or non-woven fabric etc. filter material is burned to form hole, thereby avoid the problem of air leakage caused by burning, prolong the service life of filter grid and maintain long-term stable filtering performance.

Description

Technical Field

[0001] This utility model relates to the technical field of range hood accessories, and in particular to a flameproof filter 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: 1. There are unavoidable gaps between the top and bottom 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.

[0004] 2. Existing filter frames are mostly welded together from multiple plates. The welding process inevitably causes thermal deformation, leading to a decrease in the flatness and dimensional accuracy of the frame. This not only makes the assembly process cumbersome, inefficient, and costly, but also directly increases the clearance between the outer frame and the slide rail, exacerbating the aforementioned air leakage problem.

[0005] 3. During prolonged stir-frying, some open flames may be drawn into the range hood. The temperature of the open flames can reach 500-600 degrees Celsius, which will create ablation pores in the activated carbon or non-woven fabric interlayer. The flue gas will leak and escape through these ablation pores, reducing the filtration effect and affecting the service life of the filter. Utility Model Content

[0006] 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 flame-proof filter structure for a range hood.

[0007] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a flameproof filter structure for a range hood, including: an outer frame assembly, a filter element assembly, and cushioning cotton; The outer frame assembly has an annular frame structure, and the filter element assembly is sandwiched inside the outer frame assembly; the cushioning cotton is provided on at least one side of the upper, lower and peripheral sides of the outer frame assembly; and a fireproof steel wire mesh layer with a dense pore structure is provided on the outer side of the filter element assembly.

[0008] Optionally, the fireproof wire mesh layer is made of stainless steel and is adhered to the inner side of the outer frame assembly by high-temperature adhesive.

[0009] Optionally, the mesh density of the fireproof steel wire mesh layer is in the range of 100 to 600 meshes.

[0010] Optionally, the mesh density of the fireproof steel wire mesh layer is in the range of 100 to 300 meshes.

[0011] 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.

[0012] 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.

[0013] Optionally, a tension member is provided on the front side of the outer frame assembly; the tension member is locked between the connecting bracket and the frame beam by the connecting bolt; the tension member can be recessed and hidden in the retaining rail; the buffer cotton on the front side of the outer frame assembly has a clearance groove for the tension member to move.

[0014] Optionally, the pulling element is a rope or cable.

[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] The beneficial effects of this invention are as follows: By setting buffer cotton on the upper, lower, and circumferential sides of the outer frame assembly, when the filter grid is installed in the air handling unit slide rail, the buffer cotton is compressed and fills the gap between the outer frame and the slide rail, preventing the oil fume airflow from short-circuiting around the filter element through the side gaps. This ensures that the oil fume must be filtered through the filter element assembly, significantly improving filtration efficiency. Simultaneously, the densely porous fireproof steel wire mesh layer on the outer side of the filter element assembly effectively blocks direct contact between open flames and the filter element, preventing activated carbon or non-woven fabric filter materials from being eroded and forming holes. This avoids air leakage problems caused by erosion, extends the service life of the filter grid, and maintains long-term stable filtration performance.

[0018] 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

[0019] 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: Figure 1 This is a schematic diagram of the structure of the flameproof filter grid of this utility model; Figure 2 for Figure 1 Front view of the structure of the flame-proof filter grid; Figure 3 for Figure 1 Cross-sectional view of the structure of the open flame protection filter grid Explanation of key component symbols: 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. Fireproof steel wire mesh layer; 30. Buffer cotton; 31. Clearance groove. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Example Reference Figures 1 to 3 The present invention proposes a flameproof filter structure for a range hood, comprising: an outer frame assembly 10, a filter element assembly 20, and a buffer 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; at least one side of the upper, lower and peripheral sides of the outer frame assembly 10 is provided with cushioning cotton 30; and the outer side of the filter element assembly 20 is provided with a fireproof steel wire mesh layer 21 with a dense pore structure.

[0025] In this invention, by providing buffer cotton 30 on the upper, lower, and peripheral sides of the outer frame assembly 10, when the filter grid is installed in the air handling unit slide rail, the buffer cotton 30 is compressed and fills the gap between the outer frame and the slide rail, preventing the oil fume airflow from short-circuiting around the filter element through the side gaps, ensuring that the oil fume must be filtered by the filter element assembly 20, and significantly improving the filtration efficiency. Simultaneously, the densely porous fireproof steel wire mesh layer 21 provided on the outer side of the filter element assembly 20 can effectively block open flames from directly contacting the filter element, preventing activated carbon or non-woven fabric filter materials from being eroded and forming holes, thereby avoiding air leakage problems caused by erosion, extending the service life of the filter grid, and maintaining long-term stable filtration performance.

[0026] In this embodiment, the fireproof wire mesh layer 21 is made of stainless steel and is adhered to the inner side of the outer frame assembly 10 by a high-temperature adhesive. The fireproof wire mesh layer 21, made of stainless steel, possesses excellent high-temperature resistance and corrosion resistance, enabling long-term use in high-temperature oil fume environments without deformation or damage. The high-temperature adhesive ensures a secure and reliable connection to the inner side of the outer frame assembly 10, preventing the wire mesh layer from detaching under airflow impact and ensuring the continuity of fire protection and the overall stability of the structure. The high-temperature adhesive can be inorganic high-temperature adhesive, high-temperature epoxy flame-retardant adhesive, or organosilicon flame-retardant high-temperature adhesive, etc.

[0027] In this embodiment, the mesh density of the fireproof steel wire mesh layer 21 is in the range of 100 to 600 meshes. The dense pore structure of 100-600 meshes effectively blocks open flames and sparks from passing through, preventing sparks from contacting the inner filter element. It also intercepts larger particles (such as cooking residue) in the oil fume airflow, reducing filter element wear. Controlling the mesh density between 100-600 meshes avoids excessive wind resistance (affecting the negative pressure exhaust performance of the range hood) due to overly fine meshes, and also prevents fireproofing and filtration failure due to overly coarse meshes, perfectly matching the airflow requirements of household range hoods.

[0028] Preferably, the mesh density of the fireproof steel wire mesh layer 21 is in the range of 100 to 300 meshes. Compared with a mesh size of 300-600 meshes, a mesh size of 100-300 meshes has a larger ventilation cross-sectional area and lower wind resistance, which can reduce the impact on the smoke exhaust efficiency of the range hood, and is especially suitable for the use of high-suction household range hoods; a mesh size of 100-300 meshes is easier to process and has less material waste, which can reduce the production and manufacturing cost of the fireproof steel wire mesh layer 21.

[0029] In this embodiment, the outer frame assembly 10 has a rectangular frame structure, including frame beams 11 and connecting brackets 12. The connecting 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 assembly 10 is assembled from the frame beams 11 and connecting brackets 12 by connecting bolts 13, replacing the traditional welding process and eliminating frame unevenness and dimensional errors caused by welding heat deformation. This modular design improves the precision and consistency of the outer frame, reduces the fitting gap between the outer frame and the slide rail, reduces the risk of air leakage, simplifies the assembly process, improves production efficiency and product yield, and reduces manufacturing costs.

[0030] Specifically, the frame beam 11 is equipped with a retaining rail 111; the connecting bracket 12 is equipped 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 retaining rail 111 on the frame beam 11 and the connecting lug 121 on the connecting bracket 12, through the snap-fit ​​connection and bolt locking, enable quick alignment and secure assembly of the outer frame assembly 10. This design ensures tightness at the four corner connections, preventing the frame from loosening or deforming during use, further enhancing the structural rigidity and sealing of the outer frame, and reducing gap changes caused by vibration.

[0031] Furthermore, 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 buffer cotton 30 on the front side of the outer frame assembly 10 has a relief groove 31 for the pull member 14 to move. Users can easily pull out the filter screen for cleaning or replacement through the pull member 14, improving ease of use. The pull member 14 can be recessed and hidden in the retaining rail 111, without protruding from the frame surface, maintaining a clean appearance; the relief groove 31 on the buffer cotton 30 ensures that the pull member 14 will not compress or damage the buffer cotton 30 when it moves, thereby maintaining the sealing effect of the buffer cotton 30 and avoiding air leakage caused by pulling operation.

[0032] In this embodiment, the pulling component 14 is a pull rope or cable. The pull component 14, being a pull rope or cable, is soft and durable, and will not scratch the user or damage the internal structure of the range hood during operation, thus reducing the risk of use.

[0033] 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.

[0034] 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.

[0035] 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 flameproof filter 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 at least one side of the upper, lower and peripheral sides of the outer frame assembly (10); and a fireproof steel wire mesh layer (21) with a dense pore structure is provided on the outer side of the filter element assembly (20).

2. The flameproof filter structure for a range hood according to claim 1, characterized in that: The fireproof steel wire mesh layer (21) is made of stainless steel and is adhered to the inner side of the outer frame assembly (10) by high-temperature adhesive.

3. The flameproof filter structure for a range hood according to claim 1, characterized in that: The mesh density of the fireproof steel wire mesh layer (21) is in the range of 100 to 600 mesh.

4. The flameproof filter structure for a range hood according to claim 3, characterized in that: The mesh density of the fireproof steel wire mesh layer (21) is in the range of 100 to 300 mesh.

5. The flameproof filter 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).

6. The flameproof filter structure for a range hood according to claim 5, 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).

7. The flameproof filter structure for a range hood according to claim 6, characterized in that: A tension member (14) is provided on the front side of the outer frame assembly (10); 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); the buffer cotton (30) on the front side of the outer frame assembly (10) is provided with a relief groove (31) for the tension member (14) to move.

8. The flameproof filter structure for a range hood according to claim 7, characterized in that: The pulling component (14) is a rope or cable.

9. The flameproof filter 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.

10. The flameproof filter 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.

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