Self-cleaning lampblack filtering device and range hood

Abstract

The utility model discloses a self-cleaning oil fume filtering device and a range hood. The self-cleaning oil fume filtering device comprises a cylindrical filter screen with openings in the top and the bottom, the first driving assembly drives the filter screen to rotate around a central shaft of the filter screen; the cleaning assembly comprises bristles for cleaning the filter screen and a bristle base for fixing the roots of the bristles, and the bristles are distributed on the bristle base in the direction facing the center axis of the filter screen; the net surface of the filter net is bent along the axial direction, so that the peripheral wall of the filter net is provided with a W-shaped longitudinal section, and the net surface is provided with a plurality of bent parts which comprise a near bent part closer to the bristle base and a far bent part farther from the bristle base; the bristles of the cleaning assembly comprise long bristles with long length and short bristles with short length, the long bristles are used for making contact with the far bent part of the filter screen or / and at least part of the area of the folded face adjacent to the far bent part, and the long bristles are used for making contact with the near bent part of the filter screen or / and at least part of the area of the folded face adjacent to the near bent part. When the height difference between the concave part and the convex part of the net surface of the bent filter net is large, a better self-cleaning function can be realized.

Description

Technical Field

[0001] The utility model relates to kitchen appliances, in particular to a self-cleaning oil fume filtering device and a range hood with the filtering device. Background Art

[0002] The range hood plays an important role in the family kitchen. It can absorb all kinds of spicy smells and oil smoke produced during stir-frying and protect the health of the family. Since the filtering efficiency of single-layer fixed filter for oil smoke is very limited, the existing range hoods have begun to use double-layer filter as an improved filter, and the filter is curled into a cylinder, and the dynamic interception of oil smoke is achieved by low-speed rotation. On this basis, some range hoods will also improve the flat filter into a bent filter with multiple bends on the mesh surface to further increase the contact area between the filter and the oil smoke. You can refer to the filter device disclosed in the Chinese utility model patent "A kind of oil smoke filtering device and range hood using the filter device" with application number 201721024843.0 (authorization announcement number CN 207050044 U).

[0003] The corners of the bent filter are prone to oil accumulation. Adding a dynamic real-time cleaning structure can avoid the weakening of the oil fume absorption effect caused by the increase in wind resistance after long-term oil accumulation. Most of the real-time cleaning devices in the prior art use cleaning tools such as fixed brushes. For example, the above-mentioned patent is to fix a brush for cleaning the outer surface of the filter on the rotating path of the filter. As the filter rotates, the outer surface of the bent filter that is farther and closer to the brush is alternately cleaned by the bristles. The position of the brush is fixed, and the length of the bristles is also fixed, so this cleaning structure has a poor cleaning effect when the filter surface is undulating due to bending. The outer surface of the part closer to the brush cannot be fully cleaned due to excessive bending of the bristles, and the durability of the brush is also greatly challenged when cleaning this part, while the outer surface of the part farther from the brush cannot be fully cleaned due to insufficient bristle length. Under the existing cleaning structure conditions, in order to make the filter have a better cleaning ability, the bending and undulation of the filter surface needs to be smaller, and in order to make the filter have a larger oil fume contact area, the filter surface needs to be bent more times. Range hoods require a higher level of production technology to meet both of these conditions at the same time, and the processing difficulty and production cost also increase accordingly. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to propose a fume filtering device which can achieve a better self-cleaning function even when the bending fluctuations of the bending filter surface are large in response to the above technical status.

[0005] The second technical problem to be solved by the utility model is to provide a range hood with the above-mentioned oil fume filtering device.

[0006] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a self-cleaning oil fume filtering device, comprising

[0007] The filter screen is cylindrical in shape as a whole, with openings at the bottom and top of the cylinder;

[0008] A first driving assembly drives the filter to rotate around its central axis;

[0009] A cleaning component, comprising bristles for cleaning the filter and a bristle base for fixing the roots of the bristles, wherein the bristles are distributed on the bristle base in a direction toward the central axis of the filter;

[0010] It is characterized in that

[0011] The mesh surface of the filter screen is bent along the axial direction so that the peripheral wall has a W-shaped longitudinal section, and the mesh surface has a plurality of bending parts, each bending part includes a near bending part closer to the bristle base and a far bending part farther from the bristle base;

[0012] The bristles of the cleaning component include long bristles with a longer length and short bristles with a shorter length. The long bristles are used to contact the far bending portion of the filter and / or at least a portion of the folding surface adjacent thereto, and the short bristles are used to contact the near bending portion of the filter and / or at least a portion of the folding surface adjacent thereto.

[0013] The self-cleaning oil fume filter device of the utility model is provided with axial bends on the mesh surface of the filter screen, and the bristles are divided into long bristles and short bristles, so that the far bend portion of the filter screen is always cleaned by the long bristles, and the near bend portion of the filter screen is always cleaned by the short bristles. Because unlike the prior art, the far bend portion and the near bend portion are no longer alternately cleaned by bristles of the same length during the rotation process, no matter how large the bend of the filter screen is, the bristles of the utility model will not be greatly deformed or fail to reach the mesh surface, thereby continuously ensuring the self-cleaning effect.

[0014] The dense arrangement of bristles on the bristle base will cause certain interference to the gas flow at the filter. Therefore, as an improvement, the cleaning component includes a first bristle base and a second bristle base. The long bristles are divided into multiple groups spaced apart from each other and arranged on the first bristle base, and the short bristles are divided into multiple groups spaced apart from each other and arranged on the second bristle base.

[0015] Among the outer surface of the filter, the part through which the oil smoke passes first is recorded as the first outer surface, and the rest is recorded as the second outer surface. During the rotation of the filter, the first outer surface and the second outer surface transform into each other. The first outer surface is the main windward surface of the filter, and oil stains accumulate seriously at the concave folds. As a preferred solution, the long bristles of the utility model are always in contact with the first outer surface to clean it in real time. The folded surface of the filter is provided with filter holes, and the filter holes are cleaned by the long bristles; the short bristles act on the second outer surface to clean the oil stains near the bend and the adjacent folded surface inside the range hood.

[0016] In order to better fit the undulations of the filter surface, preferably, each group of long bristles gradually increases from both sides to the middle along the length direction of the bristle base, and each group of short bristles gradually shortens from both sides to the middle along the length direction of the bristle base.

[0017] As a preferred solution of the utility model, the cleaning component includes a bristle base connector for connecting the first bristle base with the second bristle base, and the self-cleaning oil fume filter device also includes a second drive component, the second drive component drives the bristle base connector to rotate, and the bristle base connector drives the first bristle base and the second bristle base to rotate around the central axis of the filter screen. The cleaning component and the filter screen can rotate in opposite or same directions, and the rotation speeds can also be different, and they are all independently controlled. The rotation process can achieve multi-layer interception, adsorb oil fume, and have a higher grease separation rate. The central axes of the first bristle base, the second bristle base, and the filter screen are located in the same plane, and the rotation structure is more stable.

[0018] Furthermore, a filter connecting piece connected to the filter is provided at the filter opening, and the first driving assembly drives the filter connecting piece to rotate, and the filter connecting piece drives the filter to rotate.

[0019] Furthermore, the surface of the filter of the utility model is coated with a hydrophilic and oleophilic coating, and the surface of the filter connector is an oil-absorbing material, which can absorb more oil smoke during the process of intercepting oil smoke.

[0020] The technical solution adopted by the utility model to solve the second technical problem is: a range hood, characterized in that the self-cleaning oil fume filtering device is applied.

[0021] Compared with the prior art, the range hood of the utility model also has the same advantage, that is, when the bending fluctuations of the curved filter screen are large, a better self-cleaning function can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the range hood in the embodiment of the utility model;

[0023] Figure 2A cross-sectional view of a range hood in an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the filtering device in the embodiment of the utility model. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 3 As shown in FIG. 1 , a preferred embodiment of a range hood using the self-cleaning oil fume filter device of the utility model is shown. The range hood is provided with an air inlet for absorbing oil fume, and the self-cleaning oil fume filter device 100 is installed at the air inlet.

[0027] The self-cleaning oil fume filtering device 100 mainly includes a filter screen 110, a first driving component 120 for driving the filter screen 110 to rotate, a cleaning component 130, and a second driving component 140 for driving the cleaning component 130 to rotate.

[0028] The cleaning assembly 130 cleans the filter screen 110 , and includes bristles 131 for cleaning the filter screen 110 and a bristle base for fixing the roots of the bristles 131 .

[0029] like Figure 3 As shown, the filter screen 110 is cylindrical as a whole, and the left and right ends of the filter screen 110 are open. The mesh surface of the filter screen 110 is bent along the axial direction so that the peripheral wall has a W-shaped longitudinal cross-section, that is, the outer peripheral wall of the mesh surface is continuously bent along the axial direction to form a plurality of bending portions 111 on the mesh surface, and each bending portion 111 includes a near bending portion 111b closer to the bristle base and a far bending portion 111a farther from the bristle base.

[0030] A rod-shaped filter connector 113 is provided at the opening of the filter 110. The power output shaft of the first drive assembly 120 is threadedly connected to the filter connector 113, driving the filter connector 113 to rotate, and the filter connector 113 drives the filter 110 to rotate circumferentially. The surface of the filter connector 113 has an oil-absorbing material, and the filter connector 113 can absorb the oil on the filter 110 during the rotation process. The surface of the filter 110 is coated with a hydrophilic and oleophilic coating to further enhance the oil absorption effect.

[0031] The bristles 131 of the cleaning component 130 include long bristles 131a with a longer length and short bristles 131b with a shorter length. The folded surface 112 of the filter 110 is provided with filter holes 114. In the present embodiment, the long bristles 131a are used to contact the far bend portion 111a of the cleaning filter 110, and at least to contact a portion of the folded surface 112 adjacent thereto that includes the filter holes 114. The short bristles 131b are used to contact the near bend portion 111b of the filter 110, and at least to contact the remaining area of ​​the folded surface 112 adjacent thereto that is not cleaned by the long bristles 131a. When designing the cleaning component, the short bristles 131b may also be made to contact only the near bend portion 111b, while the long bristles 131a may contact the far bend portion 111a and the adjacent folded surface 112; or vice versa, with the short bristles 131b contacting the near bend portion 111b and the adjacent folded surface. 112 , while the long bristles 131a only contact the distal bending portion 111a.

[0032] The bristle base is divided into a first bristle base 132 and a second bristle base 133 . The long bristles 131 a are divided into multiple groups spaced apart from each other and arranged on the first bristle base 132 . The short bristles 131 b are divided into multiple groups spaced apart from each other and arranged on the second bristle base 133 .

[0033] Among the outer surface of the filter 110, the part through which the oil smoke passes first is recorded as the first outer surface 115, and the rest is recorded as the second outer surface 116. During the rotation of the filter 110, the first outer surface 115 and the second outer surface 116 transform into each other. The first outer surface 115 is the main windward surface of the filter 110, and oil stains accumulate seriously at the concave fold 111a.

[0034] Therefore, the long bristles 131a of this embodiment always act on the first outer surface 115 to clean it in real time; the short bristles 131b act on the second outer surface 116 to clean the oil stains on the far and near bending parts and the adjacent folding surfaces 112 inside the range hood.

[0035] The first outer surface 115 is heavily oily, and the long bristles 131a need to have a strong bristle structure to ensure the cleaning effect. Space must be reserved for the strong bristle structure. At the same time, a larger gap must be left so as not to affect the air flow on the main windward surface. The distance between the first bristle base 132 and the filter 110 is set larger.

[0036] The first bristle base 132 and the second bristle base 133 are parallel, and two bristle base connectors 134 connect the ends of the first bristle base 132 and the second bristle base 133. The four are connected to form a frame and are located in the same plane as the axis of the filter 110. The power output shaft of the second driving assembly 140 is threadedly connected to the bristle base connector 134 to drive it to rotate, which drives the first bristle base 132 and the second bristle base 133 to rotate along the circumference of the filter 110.

[0037] When the second driving assembly 140 stops working, the cleaning assembly 130 can also exert a better cleaning ability. The second driving assembly 140 drives the cleaning assembly 130 to swing back and forth within a range of 180 degrees to further improve the cleaning effect.

[0038] In this embodiment, the first driving assembly 120 and the second driving assembly 140 are both motors with motor boxes.

Claims

1. A self-cleaning oil fume filtering device, comprising: A filter screen (110), the filter screen (110) is cylindrical in shape as a whole, with openings at the bottom and top of the cylinder; A first driving assembly (120) drives the filter screen (110) to rotate around its central axis; A cleaning component (130) comprising bristles (131) for cleaning the filter screen (110) and a bristle base for fixing the roots of the bristles (131), wherein the bristles (131) are distributed on the bristle base in a direction toward the central axis of the filter screen (110); It is characterized in that The mesh surface of the filter (110) is bent along the axial direction so that the peripheral wall has a W-shaped longitudinal section, and the mesh surface has a plurality of bent portions (111), each bent portion (111) including a near bent portion (111b) closer to the bristle base and a far bent portion (111a) farther from the bristle base; The bristles (131) of the cleaning component (130) include long bristles (131a) of relatively long length and short bristles (131b) of relatively short length. The long bristles (131a) are used to contact the distal bending portion (111a) of the filter (110) and / or at least a portion of the folding surface (112) adjacent thereto, and the short bristles (131b) are used to contact the proximal bending portion (111b) of the filter (110) and / or at least a portion of the folding surface (112) adjacent thereto.

2. The self-cleaning oil fume filtering device according to claim 1, characterized in that: The cleaning component (130) comprises a first bristle base (132) and a second bristle base (133), the long bristles (131a) are divided into a plurality of mutually spaced groups and arranged on the first bristle base (132), and the short bristles (131b) are divided into a plurality of mutually spaced groups and arranged on the second bristle base (133).

3. The self-cleaning oil fume filtering device according to claim 2, characterized in that: The portion of the outer surface of the filter (110) through which the oil smoke first passes is recorded as the first outer surface (115), and the rest is recorded as the second outer surface (116). During the rotation of the filter (110), the first outer surface (115) and the second outer surface (116) are transformed into each other, and the long bristles (131a) are always in contact with the first outer surface (115), and the short bristles (131b) are always in contact with the second outer surface (116).

4. The self-cleaning oil fume filtering device according to claim 3, characterized in that: The folded surface (112) of the filter screen (110) is provided with filter holes (114), and the filter holes (114) are cleaned by the long bristles (131a).

5. The self-cleaning oil fume filtering device according to claim 4, characterized in that: Each group of long bristles (131a) gradually increases from both sides to the middle along the length direction of the bristle base, and each group of short bristles (131b) gradually shortens from both sides to the middle along the length direction of the bristle base.

6. The self-cleaning oil fume filtering device according to claim 2, characterized in that: The cleaning assembly (130) includes a bristle base connector (134) for connecting the first bristle base (132) and the second bristle base (133), and the self-cleaning oil fume filtering device also includes a second driving assembly (140), and the second driving assembly (140) drives the bristle base connector (134) to rotate, and the bristle base connector (134) drives the first bristle base (132) and the second bristle base (133) to rotate around the central axis of the filter (110).

7. The self-cleaning oil fume filtering device according to claim 6, characterized in that: The central axes of the first bristle base (132), the second bristle base (133) and the filter screen (110) are located in the same plane.

8. The self-cleaning oil fume filtering device according to claim 1, characterized in that: A filter screen connector (113) connected to the filter screen (110) is provided at the opening of the filter screen (110), and the first driving assembly (120) drives the filter screen connector (113) to rotate, and the filter screen connector (113) drives the filter screen (110) to rotate.

9. The self-cleaning oil fume filtering device according to claim 8, characterized in that: The surface of the filter screen (110) is coated with a hydrophilic and oleophilic coating, and the surface of the filter screen connecting piece (113) is made of an oil-absorbing material.

10. A range hood, characterized in that: The self-cleaning oil fume filter device according to any one of claims 1 to 9 is used.

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