CN106765391B

CN106765391B - Fume filter

Info

Publication number: CN106765391B
Application number: CN201611191593.XA
Authority: CN
Inventors: 唐中洋; 张传福; 胡承杰; 茅忠群; 诸永定; 李斌
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2016-12-21
Filing date: 2016-12-21
Publication date: 2023-09-15
Anticipated expiration: 2036-12-21
Also published as: CN106765391A

Abstract

The invention discloses a lampblack filter, which comprises a frame, wherein the frame is of a hollow structure surrounded by a peripheral wall, the height direction of the peripheral wall is used as a first direction, the thickness direction of the peripheral wall is used as a second direction, and the first direction is the flowing direction of lampblack, and the lampblack filter is characterized in that: the oil smoke filter is characterized in that a flow guide structural member is arranged in the middle of the frame, a plurality of cyclone sheets are connected between the flow guide structural member and the peripheral wall, the cyclone sheets incline relative to the second direction, an air inlet channel for oil smoke to pass through is formed between adjacent cyclone sheets, and projections of the adjacent cyclone sheets in the first direction are mutually clung or at least partially overlapped. Through setting up a plurality of inclined whirl pieces, the air current does not have sharp passageway when passing through the oil smoke filter, must walk around the whirl piece and pass through from the air inlet passageway, and in this process, the air current can contact with the whirl piece and filter a part of grease, obtains better filter effect.

Description

Fume filter

Technical Field

The invention relates to a filtering device, in particular to a lampblack filter.

Background

Along with the continuous improvement of the environmental protection and health consciousness level of people, people pay more and more attention to environmental protection indexes of the range hood. The range hood has an important performance index, namely the oil separation degree. The stronger the oil-and-fat filtering ability of the range hood is, the higher the oil-and-fat separation degree is.

At present, the traditional range hood generally adopts a porous filter screen to intercept oil smoke, and oil grease of the range hood is filtered through the actions of collision, speed reduction, condensation and the like with oil smoke gas. The rotary oil separating filter screen of the range hood disclosed in China patent with the application number of 201420296349.X is characterized in that a central hole of a filter screen disk is arranged on a rotating shaft of a motor through a sleeve and a knob, the disk body of the filter screen disk is circular, the disk body is provided with filter holes, and the filter holes are circumferentially arranged with the central hole of the disk body as a circle center and have different radiuses; the filter screen of the range hood disclosed in China patent application No. 201420326485.9 comprises a filter screen body and a mounting part, wherein a plurality of circular meshes are formed in the filter screen body, and the meshes are regularly distributed along a circumferential array or a triangular array. However, the equivalent pore diameter of the porous net is not designed to be too small, otherwise, larger air inlet resistance is formed, the oil smoke absorbing effect is affected, and noise is deteriorated, so that the capability of intercepting and filtering grease is generally not high, and the service life is shorter.

Still another filtering structure using a steel wire wound rotary disk, such as an oil screen cover of a domestic range hood disclosed in China patent application No. 201320066289.8, comprising a cover body, wherein the cover body comprises a breathable rigid outer cover layer, a breathable rigid inner cover layer and an oil storage layer positioned between the rigid outer cover layer and the rigid inner cover layer, the oil storage layer is made of a corrugated woven net with concave-convex water dispersed outwards by taking the center of the rigid outer cover layer as the center, and the woven net can be made of stainless steel wires; the oil smoke separator disclosed in China patent with the application number of 201320126221.4 comprises a wheel main body, oil smoke filter screen steel wires and a fixing sheet, wherein the wheel main body is provided with a hub part and a rim part, a shaft sleeve is arranged at the center of the hub part, the oil smoke filter screen steel wires penetrate through the shaft sleeve, and the oil smoke filter screen steel wires are uniformly wound and woven along the peripheral circumferential direction of the rim part to form a radial mesh enclosure to be arranged on the surface of the wheel main body. However, the manufacturing process of the filter screen structure is very complicated, the winding of the steel wire can only be in a straight line state between two fulcrums, and the structure is similar to a straight spoke staggered structure of a bicycle tire, so that the filtering capability is influenced on one hand, and on the other hand, the steel wire of the mildly hemp generates extremely large noise after rotating, the sound quality is reduced, and the cleaning is very troublesome.

Disclosure of Invention

The invention aims to solve the technical problems of the prior art and provides the oil fume filter with high oil separation efficiency.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a lampblack filter, includes the frame, the frame is the hollow structure that is enclosed by the perisporium to the direction of height of perisporium is first direction, and the thickness direction of perisporium is the second direction, and first direction is the flow direction of lampblack, its characterized in that: the oil smoke filter is characterized in that a flow guide structural member is arranged in the middle of the frame, a plurality of cyclone sheets are connected between the flow guide structural member and the peripheral wall, the cyclone sheets incline relative to the second direction, an air inlet channel for oil smoke to pass through is formed between adjacent cyclone sheets, and projections of the adjacent cyclone sheets in the first direction are mutually clung or at least partially overlapped.

The smaller the flow guiding structural member is, the smaller the distance between the swirl plates is, so that the inclination angle needs to be increased to ensure enough gaps, while the closer the swirl plates are to the peripheral wall, the smaller the inclination angle of the swirl plates relative to the second direction is, so that the inclination angle needs to be reduced.

The larger the inclination angle is, the worse the filtering effect is, and the smaller the wind resistance is; the smaller the inclination angle is, the better the filtering effect is, the larger the wind resistance is, in order to achieve the optimal balance of the filtering effect and the wind resistance, the maximum inclination angle of the cyclone sheet close to the flow guiding structural part is denoted as alpha 1, the minimum inclination angle of the cyclone sheet close to the peripheral wall is denoted as alpha 2, the alpha 1 is more than or equal to 30 degrees and less than or equal to 80 degrees, and the alpha 2 is more than or equal to 10 degrees and less than or equal to 60 degrees.

In order to achieve a sufficiently large contact area and a reduced wind resistance, the swirl blades have a width which gradually increases to form a triangle when extending from the guide structural member to the peripheral wall (11), the height of the swirl blades in the first direction is D2,wherein S is the flow area of the swirl plate.

Because the quality of grease is big, and the inertia is great, consequently can be thrown to the perisporium, the perisporium inboard is provided with a plurality of archs, the arch is regularly or irregularly distributed, because bellied existence, can hold back more grease like this to promote filtration efficiency, and do not have bigger windage.

Preferably, in order to avoid the airflow channel on the peripheral wall through which the oil smoke directly passes, at least one protrusion is arranged on any one of the straight lines extending in the first direction inside the peripheral wall.

In order to more smoothly guide the oil smoke airflow to pass through between the cyclone sheets, the flow guiding structural member is provided with a circular arc-shaped flow guiding transition surface at the upstream end part of the oil smoke flow path, and the flow guiding transition surface protrudes towards the upstream of the oil smoke flow path.

Preferably, the swirl plates are distributed in a plane or a cone.

Preferably, in order to enhance the filtering effect, the cyclone sheet is arranged with a plurality of layers at intervals in the first direction.

Compared with the prior art, the invention has the advantages that: by arranging a plurality of inclined swirl plates, when the airflow passes through the oil fume filter, no straight line channel is needed, the airflow passes through the air inlet channel by bypassing the swirl plates, and in the process, the airflow can be contacted with the swirl plates to filter out part of grease, so that a better filtering effect is obtained; when the air current hits the perisporium, owing to the existence of arch, more grease can be held back like this to promote filtration efficiency, and do not have bigger windage.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of a soot filter of the present invention;

fig. 2 is a cross-sectional view of a first embodiment of the soot filter of the present invention;

fig. 3 is a bottom view of a first embodiment of the soot filter of the present invention;

fig. 4 is a schematic structural view of a second embodiment of the soot filter of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

Example 1

Referring to fig. 1 to 3, a soot filter includes a frame 1, a swirl plate 2 provided in the frame 1, and a middle flow guiding structural member 3.

In this embodiment, the frame 1 includes a peripheral wall 11 enclosing a rectangular space, the flow guiding structure 3 is cylindrical and is located at the center of the rectangular space, and the oil smoke flows in the axial direction of the flow guiding structure 3. The guide structure 3 is provided with a circular arc-shaped guide transition surface 31 at the upstream end of the oil smoke flow path, and the guide transition surface 31 protrudes towards the upstream of the oil smoke flow path. The height direction of the peripheral wall 11 is taken as a first direction, the thickness direction of the peripheral wall 11 is taken as a second direction as indicated by an arrow a in fig. 2, and the first direction is taken as a flow direction of the oil smoke as indicated by an arrow B in fig. 2. Alternatively, the flow guiding structure 3 may be elliptical or rectangular.

The swirl plate 2 includes a plurality of swirl plates extending from the intermediate guide structure 3 to the peripheral wall 11, and the width of the swirl plate 2 gradually increases from the junction with the guide structure 3 to the peripheral wall 11, and has a substantially triangular shape. Each swirl plate 2 is inclined at a certain angle to the peripheral wall 11, whereby an air inlet channel 21 is formed between two adjacent swirl plates 2.

The projections of the adjacent two swirl plates 2 in the first direction (projections on a plane perpendicular to the peripheral wall 11) are closely attached to each other or at least partially overlap, whereby there is no gap between the adjacent two swirl plates 2 after projection in the first direction. That is, the air flow does not have a straight passage when passing through the soot filter, and must bypass the cyclone sheet 2 to pass through the air inlet passage 21, and in this process, the air flow contacts the cyclone sheet 2 to filter out a part of grease.

The inner side of the peripheral wall 11 is provided with a plurality of projections 12, and the projections 12 may be regularly or irregularly distributed. On any one of the straight lines extending in the first direction on the inner side of the peripheral wall 11, there is at least one projection 12, whereby there is no passage through which the air flow can pass directly. Because the grease is large in mass and large in inertia, the grease can be thrown to the peripheral wall 11, and more grease can be trapped due to the protrusions 12, so that the filtering efficiency is improved, and no larger wind resistance exists.

The height D1 of the peripheral wall 11, and preferably the height D2 of each swirl plate 2 in the first direction, may be the same, the inclination angle α of the swirl plate 2 being defined as the angle with the second direction, the inclination angle α being decreasing in transition during extension from the central flow guiding structure 3 to the peripheral wall 11. Since the closer to the central guide structure 3 the spacing between the swirl vanes 2 is smaller, the inclination angle α needs to be increased to ensure sufficient clearance, the maximum inclination angle is denoted by α1, and the closer to the peripheral wall 11 the inclination angle needs to be decreased to ensure no clearance, the minimum inclination angle is denoted by α2. The larger the inclination angle is, the worse the filtering effect is, and the smaller the wind resistance is; the smaller the inclination angle is, the better the filtering effect is, and the larger the wind resistance is. In order to achieve the best balance of wind resistance and filtering effect, alpha 1 is more than or equal to 30 degrees and less than or equal to 80 degrees, and alpha 2 is more than or equal to 10 degrees and less than or equal to 60 degrees.

The height D2 of the swirl plate 2 is determined according to its own flow area S (total surface area through which the flow of the soot air can pass) and shape,the number N of the swirl plates 2 is determined by the maximum inclination angle alpha 1, the minimum inclination angle alpha 2, the height D2 of the swirl plates 2, the cross-sectional shape and the area, and a minimum value N exists in the number N _min Just make the oil smoke filter have direct overflow passageway, under the condition that is less than the requirement of maximum windage, the bigger N, the better the filter effect, the more windage.

In addition, the central flow guiding structural member 3 can be connected with a driving component, such as a motor, so that the oil smoke filter can integrally rotate, and the centrifugal separation effect is better.

In order to enhance the grease separating effect, the swirl plates 2 may be arranged in multiple layers at intervals in the first direction.

Example two

Referring to fig. 4, in the present embodiment, the difference from the first embodiment is that in the first embodiment, the distribution surface of the swirl plate 2 is a plane, whereas in the present embodiment, the distribution surface of the swirl plate 2 is a taper shape, which increases from the upstream to the downstream of the soot. In this case, the peripheral wall 11 of the frame 1 is a circular annular wall.

Claims

1. The utility model provides a lampblack filter, includes frame (1), frame (1) is the hollow structure that is enclosed by perisporium (11), uses the direction of height of perisporium (11) as first direction, uses the thickness direction of perisporium (11) as the second direction, and first direction is the flow direction of lampblack, its characterized in that: the oil smoke supply device is characterized in that a flow guide structural member (3) is arranged in the middle of the frame (1), a plurality of swirl plates (2) are connected between the flow guide structural member (3) and the peripheral wall (11), the swirl plates (2) incline relative to the second direction, an air inlet channel (21) for oil smoke to pass through is formed between the adjacent swirl plates (2), the adjacent swirl plates (2) are mutually clung or at least partially overlapped between projections in the first direction, and the inclination angle alpha of the swirl plates (2) relative to the second direction gradually becomes smaller from the flow guide structural member (3) to the peripheral wall (11).

2. The soot filter of claim 1, wherein: the maximum inclination angle of the swirl plate (2) close to the flow guiding structural member (3) is denoted as alpha 1, and the minimum inclination angle of the swirl plate (2) close to the peripheral wall (11) is denoted as alpha 2, and alpha 1 is more than or equal to 30 degrees and less than or equal to 80 degrees, and alpha 2 is more than or equal to 10 degrees and less than or equal to 60 degrees.

3. The soot filter of claim 1, wherein: the width of the cyclone sheet (2) gradually becomes larger to form a triangle when the cyclone sheet (2) extends from the flow guiding structural member (3) to the peripheral wall (11), the height of the cyclone sheet (2) in the first direction is D2,wherein S is the flow area of the swirl plate (2).

4. The soot filter of claim 1, wherein: a plurality of bulges (12) are arranged on the inner side of the peripheral wall (11), and the bulges (12) are regularly or irregularly distributed.

5. The soot filter of claim 4, wherein: at least one of the projections (12) is provided on any one of the straight lines extending in the first direction inside the peripheral wall (11).

6. The soot filter of any one of claims 1 to 5, wherein: the flow guiding structural member (3) is provided with a circular arc-shaped flow guiding transition surface (31) at the upstream end part of the oil smoke flow path, and the flow guiding transition surface (31) protrudes towards the upstream of the oil smoke flow path.

7. The soot filter of any one of claims 1 to 5, wherein: the swirl plates (2) are distributed in a plane or a cone.

8. The soot filter of any one of claims 1 to 5, wherein: the swirl plates (2) are arranged with a plurality of layers at intervals in a first direction.