CN114259811A - Filter disc and filter equipment that filter screen was used - Google Patents

Abstract

The invention relates to a filter sheet for a filter screen and a filter device, wherein the projection of the filter sheet along the length direction of the filter sheet comprises a concave part, a first convex part and a second convex part which are respectively connected with two ends of the concave part and are convex relative to the concave part along the same direction, the filter sheet comprises a plurality of ventilation grooves which are arranged in parallel along the length direction of the filter sheet, and the ventilation grooves extend from the first convex part to the second convex part through the concave part. The filter plate is beneficial to forming a bent gas channel, is convenient for positioning during lamination, and avoids displacement and deformation in the air inlet and outlet directions after lamination. A plurality of this cassette are range upon range of and are obtained filter equipment, and this filter equipment can avoid the ultraviolet ray to see through when using ultraviolet disinfection to its one side, avoids the cassette to shift, warp in air inlet, air-out direction in filter equipment preparation, use, and the structure is firm more stable.

Description

Filter disc and filter equipment that filter screen was used

Technical Field

The invention relates to the technical field of filter screens, in particular to a filter disc and a filter device for a filter screen.

Background

The oil fume filtering device is mainly used for purifying oil fume discharged from a kitchen and avoiding the oil fume from polluting the environment. The common oil smoke filter screen in the prior art generally comprises a frame body and a filter screen arranged on the frame body, wherein the filter screen can be prepared from a stainless steel sheet or an aluminum sheet, the stainless steel sheet or the aluminum sheet is firstly pressed into a wavy sheet, and then the wavy sheet is stacked in the frame body layer by layer. The prior patent application CN207778528U discloses a structurally stable oil smoke filtering device, which is provided with flat straight pieces between wave-shaped sheets to enhance the overall strength of the filtering net. However, the filter net formed by laminating these wavy sheets has a problem that ultraviolet rays are transmitted when one side of the filter net is sterilized by ultraviolet rays, and a problem that the wavy sheets are easily displaced and deformed during the manufacturing and using processes, for example, the wavy sheets are easily displaced and deformed in the air inlet and outlet directions.

Disclosure of Invention

In view of the disadvantages of the prior art, a first object of the present invention is to provide a filter sheet for a filter screen, which facilitates the formation of a curved gas channel, facilitates the positioning during lamination, and avoids the displacement and deformation in the air inlet and outlet directions after lamination. The second purpose of the invention is to provide a filter device with the filter disc, which can prevent ultraviolet rays from penetrating out when one side of the filter device is disinfected by ultraviolet rays, prevent the filter disc from displacing and deforming in the air inlet and outlet directions during the preparation and use processes of the filter device, and has firmer and more stable structure.

In order to achieve the first object of the present invention, the present invention provides a filter sheet for a filter screen, wherein a projection of the filter sheet along a length direction of the filter sheet comprises a concave portion and a first convex portion and a second convex portion which are connected to both ends of the concave portion and are convex relative to the concave portion along the same direction, the filter sheet comprises a plurality of ventilation grooves which are arranged in parallel along the length direction of the filter sheet, and the ventilation grooves extend from the first convex portion to the second convex portion through the concave portion.

The ventilation groove comprises a middle section positioned on the concave part, a first end section positioned on the first convex part and a second end section positioned on the second convex part; the intermediate section is offset relative to the first end section in a first lengthwise direction of the filter sheet or in a second lengthwise direction of the filter sheet opposite the first lengthwise direction, and/or the intermediate section is offset relative to the second end section in the first lengthwise direction of the filter sheet or in the second lengthwise direction of the filter sheet opposite the first lengthwise direction.

The further technical scheme is that the projection of the filter along the length direction of the filter is V-shaped, U-shaped, circular arc or cosine wave; the ventilation groove has a groove bottom of a planar type or a curved type.

To achieve the first object of the present invention, the present invention provides a filtering apparatus comprising a filtering net; the filter screen is formed by laminating a plurality of filter sheets, and the filter sheet is the filter sheet for the filter screen in any scheme; every two adjacent filter sheets are laminated in a manner that the concave parts, the first convex parts and the second convex parts respectively correspond to each other and the ventilation grooves are staggered, or in a manner that the concave parts correspond to each other, the first convex parts correspond to the second convex parts and the ventilation grooves are staggered.

The filter sheet is a filter sheet with the offset middle section of the vent groove, and the filter sheet also comprises a convex ridge connected between the adjacent vent grooves; in every two adjacent filter sheets, the two ends of the ridge of one filter sheet are correspondingly connected with the first end section and the second end section of the vent groove of the other filter sheet positioned above the ridge.

Further technical scheme is, first end section includes first connecting portion, and the second end section includes the second connecting portion, and the raised ridge both ends include the third connecting portion respectively, and first connecting portion, second connecting portion and third connecting portion are parallel.

A further technical solution is that the middle section of each two adjacent filter sheets has a different offset direction with respect to the first end section and/or the second end.

The further technical proposal is that a gap is formed between the middle part of the convex ridge and the bottom of the middle section of the vent groove connected with the two ends of the convex ridge; and air guide channels which are staggered and communicated are formed between every two adjacent filter sheets.

The further technical proposal is that the middle part of the convex ridge and the bottom of the middle section of the adjacent other vent groove of the vent groove connected with the two ends of the convex ridge are at least partially abutted or spaced for a distance.

The filter device further comprises a frame body, wherein the frame body comprises a bound edge which is used for wrapping the edge of the filter screen in the normal direction perpendicular to the length direction of the filter sheet and the stacking direction of the filter sheet.

The frame body is square or rectangular and is formed by connecting two L-shaped frames in a detachable mode.

Compared with the prior art, the invention can obtain the following beneficial effects:

the main sheet body of the filter sheet is bent, the vent grooves are arranged on the bent main sheet body and are bent along with the main sheet body, the vent grooves can form a bent gas channel, and when ultraviolet rays are used for disinfecting one side of a filter screen or a filter device, the bent gas channel can prevent ultraviolet rays from penetrating from the other side. When a plurality of filter sheets are stacked to form a filter screen, the concave part, the first convex part and the second convex part of each filter sheet can play a role in positioning, so that the concave part of the next filter sheet is stacked on the concave part of the previous filter sheet, the filter sheets are prevented from being displaced or deformed along the direction from the concave part to the first convex part or the second convex part, and the structure of the filter screen is firmer and more stable.

Drawings

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

Fig. 2 is a schematic structural view of the first embodiment of the filter sheet of the present invention at another angle.

Fig. 3 is a schematic structural view of a second embodiment of a filter sheet of the present invention.

Fig. 4 is a schematic structural view of a first embodiment of the filter device of the present invention.

Fig. 5 is a partially exploded view of a first embodiment of the filter assembly of the present invention.

Fig. 6 is an enlarged schematic view of a circled portion a in fig. 4.

Fig. 7 is a schematic structural view showing a first embodiment of a filter device according to the present invention in which two adjacent filter sheets are stacked.

Fig. 8 is a structural view of a section B-B in fig. 7.

Fig. 9 is a schematic structural view of a second embodiment of the filter device of the present invention.

Fig. 10 is an enlarged schematic view of a circled portion at C in fig. 9.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Detailed Description

As shown in fig. 1 to 2, a first embodiment of the filter sheet of the present invention provides a filter sheet, which may be a stainless steel sheet or an aluminum sheet. The projection of the filter sheet along the length direction (the first length direction D or the second length direction E) of the filter sheet comprises a concave part 1 and a first convex part 2 and a second convex part 3 which are respectively connected with two ends of the concave part 1 and are convex relative to the concave part 1 along the same direction. The first convex portion 2, the concave portion 1 and the second convex portion 3 which are sequentially connected in the projection form a V shape, a U shape, an arc shape, a cosine waveform, etc., as long as the concave portion 1 is recessed with respect to the first convex portion 2 and the second convex portion 3, and the concave portions 1 of the first convex portion 2 and the second convex portion 3 are protruded in the same direction to form a curved or bent structure. The direction in which the first and second protrusions 2 and 3 protrude with respect to the recess 1 may be defined as the height direction of the filter sheet. The first and second protrusions 2, 3 may be mirror symmetrical with respect to a plane passing through the center of the recess 1, and in some embodiments, there may also be a height difference between the first and second protrusions 2, 3 in the height direction.

The filter sheet comprises a plurality of ventilation grooves 10 which are arranged in parallel along the length direction of the filter sheet, the ventilation grooves 10 extend from the first convex parts 2 to the second convex parts 3 through the concave parts 1, and the ventilation grooves 10 extend along the curved surfaces of the first convex parts 2, the concave parts 1 and the second convex parts 3, for example, the ventilation grooves can extend along the width direction of the filter sheet basically, and the width direction can be the direction from the first convex parts 2 to the second convex parts 3. It can be seen that the air duct 10 also has a curved or bent structure, which can increase the contact area of the air passage and the turning angle of the air, and improve the oil removing effect on the oil smoke. The filter sheet may be formed from a flat sheet material having vent channels formed therein by stamping. The vent groove 10 is used to form an air passage. The vent channel 10 may have a planar or curved channel bottom.

When the filter screen 100 is made by laminating the filter screens, the concave part 1 can play a positioning role relative to the concave structure of the first convex part 2 and the second convex part 3, so that the concave part 1 of the next filter screen can fall into the concave part 1 of the previous filter screen or be coated on the outer side of the concave part 1 of the previous filter screen, and the filter screen is prevented from moving in the width direction, which is particularly important in the application of the filter screen 100, the filter screen 100 is usually fixed by a frame on the periphery when in use and is arranged at a corresponding cavity of a range hood, an air purification system, a wall and the like, the periphery of the filter screen is abutted against the frame, the frame is abutted against the wall of the cavity, and the filter screen can be prevented from moving towards the periphery, but the air inlet and outlet directions are directions in which the filter screen is stressed when in use, and the preparation and storage processes are easy to be pressed, the existing corrugated filter screen is easy to move in the air inlet and outlet directions, Warp, the flexure arrangement of the cassette of this embodiment through the main lamellar body has avoided ascending displacement, the deformation of this side, and sound construction is stable. And when disinfecting for example the inside of smoke ventilator with ultraviolet ray at filter screen 100 one side, this filter screen can block ultraviolet ray, avoids ultraviolet ray to permeate and causes the injury to the people or the thing of filter screen 100 opposite side. In addition, the structure can also improve the compressive strength of the filter screen.

The aeration tank 10 includes an intermediate section 11 located on the well 1, a first end section 12 located on the first protrusion 2, and a second end section 13 located on the second protrusion 3. In the present embodiment, the middle section 11 is offset along the first length direction D of the filter sheet relative to the first end section 12, the middle section 11 is offset along the first length direction D of the filter sheet relative to the second end section 13, the first end section 12 and the second end section 13 may be aligned or staggered in the width direction of the filter sheet, and the offset of the middle section 11 relative to the first end section 12 and the second end section 13 is beneficial to increasing the length of the air passage, increasing the contact area of the air passage, improving the oil removing effect on the oil smoke, and being capable of blocking ultraviolet rays more effectively.

As shown in fig. 3, in a second embodiment of the filter sheet of the invention, the intermediate section 11 is offset in the second longitudinal direction E of the filter sheet with respect to the first end section 12, and the intermediate section 11 is offset in the second longitudinal direction E of the filter sheet with respect to the second end section 13. The second longitudinal direction E is opposite to the first longitudinal direction D. The filter sheet in the second embodiment is centrosymmetric to the filter sheet in the first embodiment, and may be obtained by rotating the filter sheet in the first embodiment by 180 °, and if necessary, the filter screen 100 may be obtained by alternately stacking the two, or the two may be separately manufactured considering that the two may have different structures of fitting with each other at both ends in the length direction.

As shown in fig. 4 to 8, the present embodiment provides a filtering apparatus including a filtering net 100. The filter screen 100 is formed by laminating a plurality of the above-described filter sheets, and in this embodiment, it is preferable to laminate the filter sheets in such a manner that the first embodiment and the second embodiment are alternately laminated. In another embodiment of the present invention, every two adjacent filter sheets are stacked in such a manner that the concave portion 1, the first convex portion 2, and the second convex portion 3 are respectively and correspondingly adjacent and the ventilation grooves 10 are staggered, that is, the concave portion 1 of the next filter sheet is stacked on the concave portion 1 of the previous filter sheet, the first convex portion 2 of the next filter sheet is stacked on the first convex portion 2 of the previous filter sheet, the second convex portion 3 of the next filter sheet is stacked on the second convex portion 3 of the previous filter sheet and is sleeved and stacked in a one-to-one correspondence manner, the ventilation grooves 10 are staggered, including being completely staggered or partially staggered, and the ventilation grooves 10 of the previous filter sheet and the ventilation grooves 10 of the next filter sheet are not overlapped or not overlapped completely, so that the ventilation grooves 10 and the spaces between the previous filter sheet and the next filter sheet form air passages. In another embodiment of the present invention, every two adjacent filter sheets may be stacked in such a manner that the concave portions 1 are correspondingly adjacent, the first convex portions 2 are correspondingly adjacent to the second convex portions 3, and the ventilation grooves 10 are staggered, that is, the concave portion 1 of the next filter sheet is stacked on the concave portion 1 of the previous filter sheet, the first convex portion 2 of the next filter sheet is stacked on the second convex portion 3 of the previous filter sheet, and the second convex portion 3 of the next filter sheet is stacked on the first convex portion 2 of the previous filter sheet, and for example, the same filter sheets may be alternately rotated by 180 ° and then stacked, or filter sheets similar to the first embodiment and the second embodiment of the filter sheets may be alternately stacked to form a structure. No matter what kind of structure is adopted, as long as the air passage that bends is formed, the filter screen 100 can avoid the filter disc to displace or deform along the direction of pointing to the first convex part 2 or the second convex part 3 by the concave part 1, so that the structure of the filter screen is firmer and more stable, the compressive strength is also improved, and the ultraviolet rays can be blocked.

Preferably, the filter sheet further comprises ridges 20 connected between adjacent aeration channels 10. In each two adjacent filter sheets, the two ends of the ridge 20 of one filter sheet are correspondingly connected with the first end section 12 and the second end section 13 of the vent groove 10 of the other filter sheet above the ridge 20, for example, by welding, for example, by a threaded fastener. The vent groove 10 and the ridge 20 may have a smooth slope transition or a circular arc transition, the cross section of the ridge 20 may have a shape of a boss, and the top surface of the ridge 20 may be a flat surface or a curved surface.

Preferably, the first end section 12 includes a first connecting portion 14, the second end section 13 includes a second connecting portion 15, both ends of the ridge 20 include a third connecting portion 21, the third connecting portion 21 is used for connecting with the corresponding first connecting portion 14 and the second connecting portion 15, and the first connecting portion 14, the second connecting portion 15 and the third connecting portion 21 are parallel to facilitate the fitting connection therebetween.

Preferably, the offset direction of the middle section 11 of each two adjacent filter sheets relative to the first end section 12 and/or the second end section 13 is different, so that an air channel is formed between each two adjacent filter sheets, not below the ridge 20 of the previous filter sheet and above the vent groove 10, but the air channel formed below the ridge 20 of the previous filter sheet is staggered with the air channel formed on the vent groove 10, thereby increasing the filtering contact area and improving the filtering effect.

Preferably, a gap 23 is formed between the middle part 22 of the ridge 20 of the next filter sheet and the bottom of the middle section 11 of the vent groove 10 of the previous filter sheet connected with the two ends of the ridge 20, so that the spaces between every two adjacent filter sheets form staggered and communicated air guide channels, and the ventilation resistance is reduced. The size of the gap 23 can be achieved by selecting the appropriate ridge 20 width, vent slot 10 width, and offset distance of the intermediate section 11.

Preferably, the middle part 22 of the ridge 20 of the next filter sheet is at least partially abutted with the bottom of the middle section 11 of the other ventilation groove 10 adjacent to the ventilation groove 10 of the previous filter sheet connected with the two ends of the ridge 20, so that the strength of the filter screen 100 can be further improved, and when the filter screen 100 is stressed, the stress can be dispersed through the abutted part, and the filter sheet is prevented from deforming. As shown in fig. 9 to 10, in other embodiments of the present invention, the intermediate portion 22 of the ridge 20 of the next filter sheet is spaced from the bottom of the intermediate portion 11 of the aeration tank 10 adjacent to the aeration tank 10 of the previous filter sheet connected to both ends of the ridge 20 by a distance 24, which can reduce air resistance. The length of the abutment and the length of the distance 24 in the above two solutions can be adjusted by selecting the appropriate width of the ridge 20, the width of the vent groove 10 and the offset distance of the middle section 11.

Preferably, the filter device further comprises a frame 200, the frame 200 comprises a covered edge 210 wrapping the edge of the filter screen 100 in a normal direction (i.e. the width direction of the filter) perpendicular to the length direction of the filter and the stacking direction of the filter (i.e. the height direction of the filter), and the covered edge 210 is used for preventing the filter screen 100 from being entirely removed from the frame 200. The filter screen 100 can be positioned by wrapping the filter screen 100 with the frame 200, the filter sheet cannot be displaced or deformed in the length direction of the filter sheet, the stacking direction of the filter sheet (i.e., the height direction of the filter sheet), and the normal direction (i.e., the width direction of the filter sheet), and a positioning connecting rod or a connecting wire does not need to be arranged by penetrating through each filter sheet, and the filter sheet is not prevented by a facility positioning grid on the surface of the filter screen 100. In some embodiments of the invention, a positioning connecting rod or connecting line may also be provided through each filter sheet, so that each filter sheet can be positioned in the length direction better when the filter sheets are stacked, and displacement in the length direction of the filter sheets when the filter sheets are stacked is avoided.

Preferably, the frame 200 is square or rectangular and is formed by two L-shaped frames 220 detachably connected, for example, by screw fasteners, so as to facilitate the replacement and removal of the filter sheets.

Finally, it should be emphasized that the above-described embodiments are merely preferred examples of the invention, which is not intended to limit the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A filter sheet for a filter screen is characterized in that the projection of the filter sheet along the length direction of the filter sheet comprises a concave part and a first convex part and a second convex part which are connected to two ends of the concave part respectively and are convex relative to the concave part along the same direction, the filter sheet comprises a plurality of ventilation grooves which are arranged in parallel along the length direction of the filter sheet, and the ventilation grooves extend from the first convex part to the second convex part through the concave part.

2. The filter sheet according to claim 1, wherein the air channel comprises a middle section located on the concave portion, a first end section located on the first convex portion, and a second end section located on the second convex portion; the intermediate section is offset relative to the first end section in a first lengthwise direction of the filter sheet or in a second lengthwise direction of the filter sheet opposite the first lengthwise direction, and/or the intermediate section is offset relative to the second end section in the first lengthwise direction of the filter sheet or in the second lengthwise direction of the filter sheet opposite the first lengthwise direction.

3. The filter plate for the filter screen according to claim 1 or 2, wherein the projection of the filter plate along the length direction of the filter plate is in a V shape, a U shape, an arc shape or a cosine waveform; the ventilation groove has a groove bottom of a planar type or a curved type.

4. A filtering device is characterized by comprising a filter screen; the filter net is formed by laminating a plurality of filter sheets, and the filter sheet is the filter sheet for the filter net according to any one of claims 1 to 3; every two adjacent filter sheets are stacked such that the concave portions, the first convex portions, and the second convex portions are respectively adjacent to each other with the ventilation grooves being shifted, or such that the concave portions are adjacent to each other with the first convex portions and the second convex portions being adjacent to each other with the ventilation grooves being shifted.

5. A filter device according to claim 4, wherein said filter sheet is a filter sheet for a filter net according to claim 2, said filter sheet further comprising ridges connected between adjacent said aeration grooves; in every two adjacent filter sheets, two ends of the ridge of one filter sheet are respectively correspondingly connected with the first end section and the second end section of the vent groove of the other filter sheet which is positioned above the ridge.

6. A filter device according to claim 5, wherein the first end section comprises a first connecting portion, the second end section comprises a second connecting portion, and each of the two ends of the ridge comprises a third connecting portion for connecting with the corresponding first connecting portion and the second connecting portion, wherein the first connecting portion, the second connecting portion and the third connecting portion are parallel to each other.

7. A filter device according to claim 5, wherein said filter sheets are filter sheets for a filter net according to claim 2, and the direction of offset of said intermediate section with respect to said first end section and/or said second end section differs between each two adjacent filter sheets.

8. A filter device according to claim 7, wherein a space is formed between the middle portion of the ridge and the bottom of the middle section of the aeration tank connected to both ends of the ridge; and air guide channels which are staggered and communicated are formed between every two adjacent filter sheets.

9. A filter device according to claim 8, wherein the middle portion of said ridge is at least partially abutted to or spaced from the bottom of said middle section of another of said aeration grooves adjacent to said aeration groove connected to both ends of said ridge.

10. A filter device according to any one of claims 4 to 6, further comprising a frame comprising a hem wrapping the edge of the filter screen in a direction normal to the length of the filter sheet and the stacking direction of the filter sheet;

the frame body is square or rectangular and is formed by connecting two L-shaped frames in a detachable mode.

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