Range hood and filter screen thereof

Abstract

The present invention provides a range hood and a filter screen thereof, wherein the filter screen comprises a mounting shaft and a plurality of rotating mesh disks mounted on the mounting shaft, wherein the diameters of the plurality of rotating mesh disks are sequentially increased along a first direction parallel to the axis of the mounting shaft. In the present application, by setting a plurality of rotating mesh disks that are gradually increased, during the rotation process, the grease that falls off from the smaller rotating mesh disk and is not thrown to the oil ring is received by the larger rotating mesh disk, which continues to drive the grease to rotate, so that the grease is finally smoothly thrown to the oil ring, thereby solving the problem of grease entering the air duct for the second time, and effectively protecting the core components such as the centrifugal fan blades; moreover, the multi-layer rotating mesh disks that are gradually increased have a large air volume and low noise.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to a range hood and a filter screen thereof. Background Art

[0002] Nowadays, more and more people attach great importance to improving the air quality of their home environment, especially the kitchen, which is the most polluted place in the home. Since the kitchen produces fumes during cooking, which are very harmful to the human body, people usually choose range hoods to purify the kitchen environment. As an indispensable household appliance in the kitchen, the range hood has made outstanding contributions to creating a clean kitchen environment.

[0003] With the popularity of range hoods, cleaning of range hoods has become an important factor affecting the user experience. In view of this, in the prior art, a dynamic filter is set at the air inlet of the range hood to solve the problem of range hood cleaning. The dynamic filter uses high-speed rotation to mechanically collide with large particles of oil droplets and oil particles, thereby being retained and captured; under the action of centrifugal force, the intercepted and gathered grease is thrown into the oil ring around the dynamic filter and accumulated, and then flows downward into the oil cup.

[0004] However, in actual applications, the current dynamic filter is prone to the situation where the intercepted and accumulated grease escapes from the dynamic oil net before being thrown into the oil ring. The grease that escapes in the middle is sucked into the air duct, causing damage to core components such as centrifugal fan blades, thereby failing to protect the core components and effectively achieving the actual design purpose of the dynamic filter. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the dynamic filter is prone to the situation where the intercepted and accumulated grease is easily separated from the dynamic oil screen and sucked into the volute before being thrown into the oil ring, causing damage to core components such as the centrifugal fan blades, and failing to effectively achieve the actual design purpose of the dynamic filter, thereby providing a range hood and its filter.

[0006] The present invention provides a filter screen for a range hood, comprising a mounting shaft and a plurality of rotating mesh disks mounted on the mounting shaft, wherein the diameters of the plurality of rotating mesh disks increase sequentially along a first direction parallel to the axis of the mounting shaft.

[0007] Optionally, the rotating mesh disk includes a mounting disk sleeved on the mounting shaft and an outer ring structure arranged around the mounting disk; a rotating mesh wire is arranged between the outer ring structure and the mounting disk; the rotating mesh wire is arranged in an arc-shaped wire shape in a plane.

[0008] Optionally, the installation shaft is provided with multiple layers of installation steps which increase in sequence along the first direction, and the installation plate has installation holes which are opened corresponding to the installation steps.

[0009] Optionally, the plurality of rotating mesh disks include a top-layer rotating mesh disk and a lower-layer rotating mesh disk; the top-layer rotating mesh disk has the smallest diameter; the lower-layer rotating mesh disk includes a center disk cooperating with the mounting shaft and a mounting outer ring sleeved on the outside of the center disk, the rotating mesh wire is arranged between the mounting outer ring and the outer ring structure, and a support bar is arranged between the center disk.

[0010] Optionally, a plurality of the rotating mesh disks are spaced apart along the first direction, and the spacing decreases successively.

[0011] Optionally, two adjacent rotating network disks satisfy the following relationship:

[0012]

[0013] Where R1 is the radius of the smaller rotating mesh disk, R2 is the radius of the larger rotating mesh disk, w is the angular velocity of the mounting axis; H is the spacing, H = 1 / 2gt 2 ; a is the parameter margin.

[0014] Optionally, the longitudinal section and / or cross section of the rotating mesh wire is arc-shaped.

[0015] Optionally, the width of the rotating mesh is 0.5 mm-1.2 mm.

[0016] Optionally, an oil guide hole is provided on the outer ring structure.

[0017] The present invention also provides a range hood comprising any one of the above-mentioned filter nets.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The present invention provides a filter screen, which includes a mounting shaft and a plurality of rotating mesh disks mounted on the mounting shaft, wherein the diameters of the plurality of rotating mesh disks increase in sequence along a first direction parallel to the axis of the mounting shaft. By setting a plurality of rotating mesh disks that increase in size step by step, the grease that falls off from the smaller rotating mesh disk and is not thrown to the oil ring is received by the larger rotating mesh disk, which continues to drive the grease to rotate, so that the grease is finally thrown to the oil ring smoothly, thereby solving the problem of grease entering the air duct for the second time, and effectively protecting the core components such as the centrifugal fan blades; moreover, the multiple layers of rotating mesh disks that increase in size step by step have a large air volume and low noise.

[0020] 2. The present invention provides a filter net, in which support bars are arranged in the lower rotating mesh disk. Preferably, the support bars of multiple lower rotating mesh disks are aligned. With such an arrangement, the filter net can be replaced by support bars, and only a few support bars are required to play a supporting role. Moreover, the support bars of each lower rotating mesh disk are aligned and not misaligned, which can reduce the wind resistance at the overlapping positions of each layer of rotating mesh disks and reduce noise.

[0021] 3. The filter screen provided by the present invention has a filter screen in which the installation spacing of each rotating mesh disk gradually decreases along the first direction; such a design can enable a rotating mesh disk with a smaller diameter to have a larger throwing distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of a filter screen provided in a first embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a top-layer rotating mesh disk in a filter provided in a first embodiment of the present invention;

[0025] Figure 3 This is a schematic structural diagram of a lower rotating mesh disk in a filter provided in a first embodiment of the present invention;

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the installation shaft.

[0027] Description of reference numerals:

[0028] 1-first rotating mesh disk, 2-second rotating mesh disk, 3-third rotating mesh disk, 4-fourth rotating mesh disk, 5-installation shaft, 6-outer ring structure, 7-rotating mesh wire, 8-installation disk, 9-installation hole, 10-installation outer ring, 11-support bar, 12-installation step. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Figures 1 to 3 A filter screen embodiment provided by the present invention is shown.

[0031] The filter screen includes a mounting shaft 5 and four rotating net disks arranged on the mounting shaft 5, wherein the mounting shaft 5 is an axial structure extending along an axis, and the four rotating net disks include a first rotating net disk 1, a second rotating net disk 2, a third rotating net disk 3 and a fourth rotating net disk 4 arranged along a first direction parallel to the axis of the mounting shaft 5. The diameters of the first rotating net disk 1, the second rotating net disk 2, the third rotating net disk 3 and the fourth rotating net disk 4 increase in sequence.

[0032] The four rotating mesh disks include a mounting disk 8 sleeved on the mounting shaft 5 and an outer ring structure 6 arranged around the mounting disk 8. A rotating mesh wire 7 arranged in an arc-shaped filament in a plane is arranged between the outer ring structure 6 and the mounting disk 8. The longitudinal section and / or cross section of the rotating mesh wire 7 is an arc-shaped structure. The arc design intercepts grease from all directions to improve the interception efficiency. The width of the rotating mesh wire 7 is preferably 0.5mm-1.2mm. The outer ring structure 6 is provided with an oil guide hole for throwing the intercepted and gathered grease into the surrounding oil rings.

[0033] Two adjacent rotating network disks satisfy the following relationship:

[0034]

[0035] Among them, R1 is the radius of the smaller rotating mesh disk, w is the angular velocity of the mounting shaft 5, n is the rotation speed of the mounting shaft 5, w=2*π*n. After the grease is separated, it falls due to gravity, H is the distance between two adjacent rotating mesh disks, and the time required to fall H can be calculated by the formula H=1 / 2gt 2 Calculated. a is the margin parameter, preferably 5-10mm.

[0036] Through analysis, it can be seen that the square of the maximum radius of the grease on the smaller rotating mesh disk that can be thrown to the adjacent rotating mesh disk in the radial direction is R1. 2 +(w*R1*t) 2 R2 is the radius of the adjacent larger rotating mesh disk. R2 should not be less than the maximum radius to which the grease on the smaller rotating mesh disk can be thrown. In order to fully receive the grease thrown from the smaller rotating mesh disk, it is necessary to increase one parameter margin, i.e.

[0037] The present application sets up multiple rotating mesh disks that are gradually enlarged. During the rotation process, the grease that falls off from the smaller rotating mesh disk and is not thrown into the oil ring is taken up by the adjacent larger rotating mesh disk, which continues to drive the grease to rotate, so that the grease is finally smoothly thrown into the oil ring after being taken up by layers of rotating mesh disks, thereby solving the problem of grease entering the air duct for the second time and effectively protecting core components such as centrifugal fan blades. Moreover, the multiple layers of rotating mesh disks that are gradually enlarged have a large air volume and low noise.

[0038] The one with the smallest diameter among the multiple rotating mesh disks is set at the top layer, also called the top rotating mesh disk, and the remaining mesh disks are the lower rotating mesh disks. In this embodiment, the first rotating mesh disk 1 is the top rotating mesh disk, and the second rotating mesh disk 2, the third rotating mesh disk 3 and the fourth rotating mesh disk 4 are collectively referred to as the lower rotating mesh disks.

[0039] The mounting plate 8 of the lower rotating mesh disk includes a central disk with a mounting hole 9 and a mounting outer ring 10 sleeved on the outside of the central disk. A rotating mesh wire 7 is arranged between the mounting outer ring 10 and the outer ring structure 6, and a support bar 11 is arranged between the mounting outer ring 10 and the central disk, and the support bars 11 of each lower rotating mesh disk are aligned. In this arrangement, the support bars 11 are used to replace the filter screen, and only a few bars are required to play a supporting role. Moreover, the support bars 11 of each lower rotating mesh disk are aligned and not misaligned, which can reduce the wind resistance at the overlapping position of each layer of rotating mesh disk and reduce noise. Preferably, the diameter of the mounting outer ring 10 should not be larger than the diameter of the outer ring structure 6 of the adjacent smaller rotating mesh disk.

[0040] The mounting plate 8 has a mounting hole 9 that matches the mounting step 12. The mounting shaft 5 is provided with a mounting step 12 that matches the mounting hole 9 to fix the corresponding rotating mesh plate. In order to facilitate installation and assembly, the four mounting steps 12 are enlarged in sequence along the first direction, and the mounting holes 9 of the four rotating mesh plates are also enlarged in sequence, and the size should be sufficient to pass through the previously smaller mounting step 12. The rotating mesh plate and the mounting shaft 5 are fixed by riveting, screws, welding, gluing, etc., which are well known to those skilled in the art.

[0041] This embodiment takes four rotating mesh disks as an example to introduce the working principle of the present application. Obviously, the number of rotating mesh disks in the filter is not limited to four, and can be designed to be three, five, etc. according to actual conditions.

[0042] As another implementation, all the rotating mesh disks may adopt the same structure as the top rotating mesh disk, that is, the support bars 11 are not provided.

[0043] As another embodiment, the installation spacing of each rotating mesh disk is set to different spacings, and the spacing gradually decreases along the first direction; with such a design, the diameter of the first rotating mesh disk 1 is small, the centrifugal force is small, and the distance for grease to be thrown out can be larger when the spacing is set larger, that is, the rotating mesh disk with a smaller diameter can have a larger throwing distance.

[0044] The present invention also provides an embodiment of a range hood, which comprises the filter screen in the above embodiment.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A filter for a range hood, characterized in that: It comprises a mounting shaft (5) and a plurality of rotating mesh disks mounted on the mounting shaft (5), wherein the diameters of the plurality of rotating mesh disks increase in sequence along a first direction parallel to the axis of the mounting shaft (5); the rotating mesh disk comprises a mounting disk (8) sleeved on the mounting shaft (5) and an outer ring structure (6) arranged around the mounting disk (8); a rotating mesh wire (7) is arranged between the outer ring structure (6) and the mounting disk (8); the plurality of rotating mesh disks comprises a top rotating mesh disk and a bottom rotating mesh disk; the top rotating mesh disk has the smallest diameter; the bottom rotating mesh disk comprises a center disk matched with the mounting shaft (5) and a mounting outer ring (10) sleeved on the outside of the center disk; the rotating mesh wire (7) is arranged between the mounting outer ring (10) and the outer ring structure (6), and a support bar (11) is arranged between the mounting outer ring (10) and the center disk; The outer ring structure (6) is provided with oil guide holes for throwing the intercepted and accumulated grease into the surrounding oil rings; two adjacent rotating net disks satisfy the following relationship: Among them, R1 is the radius of the smaller rotating mesh disk, R2 is the radius of the larger rotating mesh disk, w is the angular velocity of the mounting shaft (5); H is the distance between two adjacent rotating mesh disks, H=1 / 2gt2, a is the parameter margin; the grease falls due to gravity after being separated, and t is the time required for H to fall.

2. The filter screen according to claim 1, characterized in that: The rotating mesh wires (7) are arranged in an arc-shaped wire shape in a plane.

3. The filter screen according to claim 2, characterized in that: The installation shaft (5) is provided with multiple layers of installation steps (12) that increase in size in sequence along the first direction, and the installation plate (8) has installation holes (9) that are opened corresponding to the installation steps (12).

4. The filter screen according to claim 1, characterized in that: The plurality of rotating mesh disks are spaced apart along the first direction, and the spacings decrease successively.

5. The filter screen according to any one of claims 1 to 4, characterized in that: The longitudinal section and / or cross section of the rotating mesh wire (7) is arc-shaped.

6. The filter screen according to claim 5, characterized in that: The width of the rotating mesh wire (7) is 0.5 mm-1.2 mm.

7. A range hood, characterized in that: The filter comprises the filter screen as claimed in any one of claims 1 to 6.

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