An oil fume filtering and self-cleaning filter element

Abstract

The utility model belongs to the oil fume filter technical field, concretely relates to a filter piece of oil fume filtering and self -purification. The filter piece of the utility model adopts the filter piece with the air gap layer to replace the traditional activated carbon to filter the oil fume, effectively solves the problem of oil retention after activated carbon adsorption saturation, and the problem of frequent replacement, the oil liquid adsorbed on the filter piece can rely on gravity and automatically discharge along the air gap layer, thereby prolonging its service life. In addition, the filter piece has flexible elasticity, and can avoid the noise generated by the air inlet vibration of the oil fume machine. The filter piece can be made of high-temperature-resistant and flame-retardant cotton material, which can better avoid flammable hazards and improve the use safety. The filter piece has the self-oil-liquid-discharge function, which can effectively prevent mildew caused by oil accumulation, and realizes the self-cleaning function while ensuring efficient oil fume filtering. The utility model has the advantages of simple and reliable structure, convenient maintenance, safe and sanitary use.

Description

Technical Field

[0001] This utility model belongs to the field of range hood filter material technology, specifically relating to a filter element for oil fume filtration and self-cleaning. Background Technology

[0002] In existing range hood technology, to reduce the accumulation of cooking fumes inside the hood and decrease the frequency of internal cleaning, a solution has emerged that incorporates activated carbon filter media. This solution utilizes the adsorption function of activated carbon to reduce fumes inside the range hood. However, activated carbon filter media has several drawbacks as a filter agent. Once saturated, the oil cannot be expelled from the activated carbon filter media by its own weight, leading to frequent replacement of the activated carbon filter media after prolonged use. Furthermore, fumes accumulated in the activated carbon filter media over time are prone to mold and foul odors, affecting kitchen hygiene. In addition, the vibration of granular activated carbon filter media during air intake generates noise, and as a combustible material, activated carbon filter media poses a risk of combustion at the high temperatures of cooking, resulting in lower product safety. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of frequent replacement and easy mold and odor risks associated with existing activated carbon filter materials used in range hoods. It provides a filter element for filtering oil fumes and self-cleaning that can be used in range hoods. It has technical advantages that are difficult to optimize in a coordinated manner, such as better oil fume filtration effect, better ventilation efficiency, self-cleaning, noise reduction and sound insulation, environmental protection, easy maintenance, and long service life.

[0004] A filter element for filtering and self-cleaning oil fumes is installed in the duct of a range hood to filter oil fumes.

[0005] The filter element is a sheet-like structure, with one side surface as the air inlet and the other side as the air outlet, and the thickness between the two surfaces is 5mm to 5cm.

[0006] The filter element is formed by stacking multiple cotton layers together. The cotton layers are set to be perpendicular to the two side surfaces of the filter element, and the thickness of each cotton layer is no more than 6 mm.

[0007] An air gap layer is formed between adjacent cotton layers. The air gap layer is parallel to the air intake direction and is configured to have lower air resistance than the cotton layer. The width of the air gap layer is no more than 1 mm.

[0008] Compared with existing technologies, the filter element of this invention uses a filter element with an air gap layer to replace traditional activated carbon for filtering oil fumes. This effectively solves the problem of oil retention after activated carbon adsorption saturation and the need for frequent replacement. The oil adsorbed on the filter element can be automatically discharged along the air gap layer by gravity, thereby extending its service life. In addition, the filter element, due to its flexibility, can avoid noise generated by the vibration of the range hood's air intake. The filter element can be made of high-temperature resistant and flame-retardant cotton material, which can better avoid flammability hazards and improve safety. The filter element has a self-draining oil function, which can effectively prevent the accumulation of oil and mold, and achieves self-cleaning function while ensuring efficient oil fume filtration. This invention has the advantages of simple and reliable structure, convenient maintenance, and safe and hygienic use.

[0009] Furthermore, the surfaces of each cotton layer are bonded together by low-melting-point fibers, and the low-melting-point fibers between adjacent cotton layers are bonded together to form an air gap layer; with this arrangement, the cotton layers are connected and formed by low-melting-point fibers, resulting in a good overall structural shaping effect of the filter element.

[0010] Furthermore, the cotton layer is integrally formed with at least one end of its adjacent cotton layer, and the integrally formed end is not located on the lower side when the filter element is installed; all cotton layers are configured to be integrally formed with adjacent cotton layers, which makes the overall structure of the filter element have good connection stability.

[0011] Alternatively, multiple connecting ends are alternately arranged on two opposite ends of the filter element; the first connecting end connects the adjacent first and second cotton layers into one unit on the first end side, the second connecting end connects the second and third cotton layers into one unit on the second end side, and the third connecting end returns to the first end side to connect the third and fourth cotton layers into one unit, and so on, so that all cotton layers are connected into one unit.

[0012] Alternatively, a fiber-shaping thin layer bonded with low-melting-point fibers is provided on one side of the filter element. The fiber-shaping thin layer is not located on the underside of the filter element when it is installed. This arrangement ensures good overall structural stability of the filter element.

[0013] Furthermore, the cotton layer includes multiple first cotton layers and second cotton layers arranged sequentially and spaced apart from each other. The cotton layers are bonded together by low-melting-point fibers. The unit volume mass of the second cotton layer is lighter than that of the first cotton layer, so that the second cotton layer forms an air gap layer. With this arrangement, the cotton layers can also absorb oil and allow the absorbed oil to be automatically discharged along the cotton layers by gravity, thereby extending its service life and ensuring efficient oil fume filtration while achieving a self-cleaning function.

[0014] Furthermore, the average porosity of the air gap layer is greater than that of the first cotton layer; this configuration enables the air gap layer to have a better oil fume adsorption effect.

[0015] Furthermore, the wind gap layer is also configured to be parallel to the direction of gravity.

[0016] Furthermore, the cotton layer contains water-repellent fibers mixed and intertwined; or, the cotton layer contains water-repellent fibers and flame-retardant fibers mixed and intertwined.

[0017] Furthermore, the diameter of the water-repellent fiber is set to the minimum, while the fiber with the largest relative diameter is set to flame-retardant fiber. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a filter element that includes an air gap layer, a cotton layer, and a fiber shaping thin layer.

[0019] Figure 2 This is a schematic diagram of a folded filter element.

[0020] Reference numerals: filter element 67, air gap layer 693, fiber shaping thin layer 692, cotton layer 691, low melting point fiber 671. Detailed Implementation

[0021] The specific embodiments of this utility model are described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model.

[0022] See Figure 1 and Figure 2 The oil fume filtering and self-cleaning filter element 67 of this utility model is installed in the duct of a range hood to filter oil fumes.

[0023] The filter element 67 has a sheet-like structure, with one side surface as the air inlet and the other side as the air outlet, and the thickness between the two surfaces is 5mm to 5cm.

[0024] The filter element 67 is formed by stacking multiple cotton layers 691. The cotton layers 691 are set to be perpendicular to the two side surfaces of the filter element 67, and the thickness of each cotton layer 691 is no more than 6 mm.

[0025] A wind gap layer 693 is formed between adjacent cotton layers 691. The wind gap layer 693 is parallel to the air intake direction and is configured to have lower wind resistance than the cotton layers 691. The width of the wind gap layer 693 is no more than 1 mm.

[0026] Compared with existing technologies, the oil fume filtration and self-cleaning filter element 67 of this utility model replaces traditional activated carbon for filtering oil fumes. This effectively solves the problem of oil retention and frequent replacement after activated carbon becomes saturated. The oil adsorbed on the filter element 67 can be automatically discharged along the air gap by gravity, thus extending its service life. Furthermore, the filter element 67, due to its flexibility, avoids noise generated by vibrations from the air intake of the range hood. The filter element 67 can be made of high-temperature resistant and flame-retardant cotton material, which can effectively avoid flammability hazards and improve safety. The filter element 67 has a self-draining oil function, which effectively prevents oil accumulation and mold growth, achieving self-cleaning while ensuring efficient oil fume filtration. This utility model has the advantages of simple and reliable structure, convenient maintenance, and safe and hygienic use.

[0027] See Figure 1 and Figure 2 In one embodiment, the surfaces of each cotton layer 691 are bonded together by low-melting-point fibers 671, and the low-melting-point fibers 671 between adjacent cotton layers 691 are bonded together to form an air gap layer 693; with this arrangement, each cotton layer 691 is connected and formed by low-melting-point fibers 671, and the overall structure of the filter element has a good shaping effect.

[0028] See Figure 1 In one embodiment, the cotton layer 691 is integrally formed with at least one end of its adjacent cotton layer 691, and the integrally formed end is not located on the lower side when the filter element 67 is installed; all cotton layers 691 are configured to be integrally formed with adjacent cotton layers 691, thereby making the overall structure of the filter element 67 have good connection stability.

[0029] Or see Figure 2 In one embodiment, multiple connecting ends are alternately arranged on two opposite ends of the filter element 67; the first connecting end connects adjacent first and second cotton layers 691 into one unit on the first end side, the second connecting end connects the second and third cotton layers into one unit on the second end side, and the third connecting end returns to the first end side to connect the third and fourth cotton layers 691 into one unit, and so on, so that all cotton layers 691 are connected into one unit.

[0030] See Figure 1 In one embodiment, a fiber shaping layer 692 bonded with low-melting-point fibers 671 is also provided on one side of the filter element 67. The fiber shaping layer 692 is not located on the lower side when the filter element 67 is installed. By setting it in this way, the overall structure of the filter element 67 has good connection stability.

[0031] Or see Figure 1 and Figure 2In one embodiment, the cotton layer 691 includes a plurality of first cotton layers and second cotton layers arranged sequentially and spaced apart from each other. The cotton layers 691 are bonded together by low melting point fibers 671. The unit volume mass of the second cotton layer is lighter than that of the first cotton layer, so that the second cotton layer forms an air gap layer. With this arrangement, the cotton layers 691 can also absorb oil and allow the absorbed oil to be automatically discharged along the cotton layers 691 by gravity, thereby extending its service life and ensuring efficient oil fume filtration while achieving a self-cleaning function.

[0032] In one embodiment, the average porosity of the air gap layer 693 is larger than that of the first cotton layer; this configuration enables the air gap layer 693 to have a better oil fume adsorption effect.

[0033] In one embodiment, the wind gap layer 693 is further configured to be parallel to the direction of gravity.

[0034] In one embodiment, the cotton layer 691 is mixed and intertwined with water-repellent fibers; or, the cotton layer 691 is mixed and intertwined with water-repellent fibers and flame-retardant fibers.

[0035] In one embodiment, the diameter of the water-repellent fiber is set to the minimum, while the fiber with the largest relative diameter is set to the flame-retardant fiber.

[0036] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A filter element for filtering and self-cleaning oil fumes, installed in the duct of a range hood to filter oil fumes, characterized in that, The filter element has a sheet-like structure, with one side surface as the air inlet and the other side as the air outlet, and the thickness between the two surfaces is 5mm to 5cm. The filter element is formed by stacking multiple cotton layers together. The cotton layers are set to be perpendicular to the two side surfaces of the filter element, and the thickness of each cotton layer is no more than 6mm. An air gap layer is formed between adjacent cotton layers. The air gap layer is parallel to the air intake direction and is configured to have lower air resistance than the cotton layer. The width of the air gap layer is no more than 1 mm.

2. The filter element for oil fume filtration and self-cleaning according to claim 1, characterized in that, The surfaces of each cotton layer are bonded together by low-melting-point fibers.

3. The filter element for oil fume filtration and self-cleaning according to claim 1, characterized in that, The cotton layer is integrally formed with at least one end of its adjacent cotton layer, and the integrally formed end is not located on the lower side when the filter element is installed; all cotton layers are configured to be integrally formed with adjacent cotton layers.

4. The oil fume filtering and self-cleaning filter element according to claim 1 or 3, characterized in that, Multiple connecting ends are alternately arranged on two opposite ends of the filter element; the first connecting end connects the adjacent first and second cotton layers into one unit on the first end side, the second connecting end connects the second and third cotton layers into one unit on the second end side, and the third connecting end returns to the first end side to connect the third and fourth cotton layers into one unit, and so on, so that all cotton layers are connected into one unit.

5. The filter element for oil fume filtration and self-cleaning according to claim 1, characterized in that, A fiber-shaping thin layer bonded with low-melting-point fibers is also provided on one side of the filter element. The fiber-shaping thin layer is not located on the underside of the filter element when it is installed.

6. The oil fume filtering and self-cleaning filter element according to claim 1, characterized in that, The cotton layer includes multiple first cotton layers and second cotton layers arranged sequentially and spaced apart from each other. The cotton layers are bonded together by low-melting-point fibers. The unit volume mass of the second cotton layer is lighter than that of the first cotton layer, so that the second cotton layer forms a wind gap layer.

7. The filter element for oil fume filtration and self-cleaning according to claim 1, characterized in that, The average porosity of the wind gap layer is greater than that of the first cotton layer.

8. The filter element for oil fume filtration and self-cleaning according to claim 1, characterized in that, The wind gap layer is also configured to be parallel to the direction of gravity.

9. The filter element for oil fume filtration and self-cleaning according to claim 1, characterized in that, The cotton layer contains water-repellent fibers mixed and intertwined; or, the cotton layer contains water-repellent fibers and flame-retardant fibers mixed and intertwined.

10. The oil fume filtering and self-cleaning filter element according to claim 9, characterized in that, The diameter of the water-repellent fiber is set to the minimum, while the fiber with the largest relative diameter is set to flame-retardant fiber.

Images