Plastic frames for sub-high efficiency air filters and sub-high efficiency air filters

Abstract

This utility model relates to the field of air filtration technology, and discloses a plastic frame for a sub-high efficiency (HEPA) air filter and the HEPA air filter itself. The plastic frame for the HEPA air filter includes: two cover plates arranged opposite each other, each cover plate having a filter element groove; multiple first support bars disposed on the air inlet side of the two cover plates, the first support bars being divided into single-groove support bars and double-groove support bars; multiple second support bars disposed on the air outlet side of the two cover plates; a reinforcing frame is fixedly connected to the side of the single-groove support bar, the two ends of the reinforcing frame being fixedly connected to the two cover plates respectively; the walls of the double-groove support bars and the second support bars are provided with longitudinal ribs and multiple X-shaped reinforcing ribs. The plastic frame for the HEPA air filter provided by this utility model, by setting the reinforcing frame, longitudinal ribs, and X-shaped reinforcing ribs, improves the strength of the first and second support bars, thereby making the first and second support bars less prone to bending deformation or breakage when subjected to impact.

Description

Technical Field

[0001] This utility model relates to the field of air filtration technology, specifically to a plastic frame for a sub-high efficiency air filter and a sub-high efficiency air filter. Background Technology

[0002] High-efficiency particulate air (HEPA) filters, widely used in industries such as electronics, pharmaceuticals, hospitals, and food, typically include a filter element and a frame for fixing the filter element. For example, Chinese utility model patent CN205825387U discloses a HEPA filter frame comprising two isosceles trapezoidal side plates and a support strip inserted between the two side plates. The inner wall of the side plates has several sequentially connected V-shaped grooves, with the groove openings facing the upper long side of the side plate. The side plates are hollowed out between adjacent V-shaped grooves, forming V-shaped notches with openings facing the lower bottom edge of the side plate. The V-shaped grooves between the two side plates correspond one-to-one. The support strip is inserted at both ends and the apex of the V-shaped grooves to form upper and lower support surfaces. However, in this design, the two ends of the support strip are plugged into the side plates, concentrating the interaction force at both ends of the support strip. When subjected to impact, the support strip is prone to bending and deformation due to insufficient support in its central area. Utility Model Content

[0003] In view of this, the present invention provides a plastic frame and a sub-high efficiency air filter to solve the problem that when the two ends of the support bar are connected to the side plate by plug-in connection, the interaction force is concentrated at the two ends of the support bar, and the support bar is prone to bending and deformation when subjected to impact due to the lack of sufficient support in the middle area.

[0004] In a first aspect, this utility model provides a plastic frame for a sub-high efficiency air filter, used to fix the filter element, the plastic frame for the sub-high efficiency air filter comprising:

[0005] Two cover plates are set opposite each other, and filter element grooves are respectively provided on the opposite wall surfaces of the two cover plates. The filter element grooves are used to insert filter elements.

[0006] Multiple first support bars are arranged side by side on the air inlet side of the two covers. The first support bars are divided into single-groove support bars and double-groove support bars. The first support bars are suitable for contacting the filter element.

[0007] Multiple second support bars are provided on the air outlet side of the two covers and are adapted to abut against the filter element;

[0008] The single-groove support bar has a reinforcing frame fixedly connected to its side. The two ends of the reinforcing frame are fixedly connected to two cover plates respectively. The double-groove support bar and the second support bar are provided with longitudinal ribs and multiple X-shaped reinforcing ribs on the wall surface away from the filter element.

[0009] In one optional embodiment, the longitudinal ribs extend along the length direction of the double-groove support bar or the second support bar, and a plurality of X-shaped reinforcing ribs are spaced apart along the extension direction of the longitudinal ribs.

[0010] In one alternative embodiment, the included angle between the two sub-ribs of the X-shaped reinforcing rib 5 is 45° to 90°.

[0011] In one alternative embodiment, the walls of the double-groove support bar and the second support bar away from the filter element are V-shaped.

[0012] In one optional embodiment, the filter element groove includes a plurality of V-shaped grooves, the arrangement direction of the plurality of V-shaped grooves being parallel to the arrangement direction of the plurality of first support bars, and the two ends of two adjacent V-shaped grooves being connected.

[0013] In one optional embodiment, slots are provided at both ends of the first support bar and the second support bar, and multiple locking blocks are provided on the cover plate. The locking blocks are fixedly disposed on the side wall of the filter element groove and located on the side of the first support bar or the second support bar away from the filter element. Each locking block is adapted to engage with a slot.

[0014] In one optional embodiment, the sidewalls at the ends and tips of the V-groove are provided with flat surfaces, the locking block is fixedly disposed on the flat surfaces, and flat plates are respectively provided at both ends of the first support bar and the second support bar. The locking groove is opened on the flat plates, and the flat plates are adapted to form surface contact with the flat surfaces.

[0015] In one optional embodiment, a first insert rod is provided between the two adjacent ends of two adjacent V-grooves, and a first insertion hole is respectively opened at both ends of the double-groove support bar and the second support bar corresponding to the first insert rod.

[0016] In one alternative embodiment, the reinforcing frame has second insertion holes at both ends, and the cover plate has second insertion rods for the second insertion holes.

[0017] Secondly, this utility model also provides a sub-high efficiency air filter, including: the aforementioned plastic frame for a sub-high efficiency air filter.

[0018] The technical solution of this utility model has the following advantages:

[0019] 1. The plastic frame for a sub-high efficiency air filter provided by this utility model improves the strength of the single groove support bar by setting a reinforcing frame, and improves the strength of the double groove support bar and the second support bar by setting longitudinal ribs and X-shaped reinforcing ribs on the wall surface of the double groove support bar and the second support bar away from the filter element, thereby preventing the first support bar and the second support bar from bending, deforming or breaking when subjected to impact.

[0020] 2. The plastic frame for a sub-high efficiency air filter provided by this utility model has two sub-ribs of the X-shaped reinforcing rib with a large angle to cover a larger area, which facilitates the enhancement of the overall strength of the double groove support bar and the second support bar.

[0021] 3. The plastic frame for a sub-high efficiency air filter provided by this utility model improves the bending resistance of the double groove support bar and the second support bar by making the wall surface of the double groove support bar and the second support bar away from the filter element V-shaped.

[0022] 4. The plastic frame for a sub-high efficiency air filter provided by this utility model has a flat surface at the end and tip of the V-groove, and a flat plate is provided at both ends of the first support bar and the second support bar. The flat plate is in contact with the flat surface to increase the contact area and improve the stability of the abutment and snap-fit.

[0023] 5. The sub-high efficiency air filter provided by this utility model has the same effect as the plastic frame used in the sub-high efficiency air filter because the sub-high efficiency air filter includes a plastic frame for the sub-high efficiency air filter. Its beneficial effects will not be repeated here. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional schematic diagram of a plastic frame for a sub-high efficiency air filter according to an embodiment of the present invention. Figure 1 ;

[0026] Figure 2 for Figure 1 The diagram shown is a three-dimensional representation of a plastic frame used for a sub-high efficiency air filter. Figure 2 ;

[0027] Figure 3 for Figure 2 The diagram shown is a 3D representation of a plastic frame concealing a single-slot support strip and a double-slot support strip. Figure 2 ;

[0028] Figure 4 for Figure 3 A magnified view of part A in the diagram;

[0029] Figure 5 for Figure 1 A three-dimensional schematic diagram of the double-groove support bar or the second support bar shown;

[0030] Figure 6 for Figure 1 A three-dimensional schematic diagram of a single-groove support bar is shown.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. First support bar; 101. Single-groove support bar; 102. Double-groove support bar; 2. Second support bar; 3. Cover plate; 4. Longitudinal rib; 5. X-shaped reinforcing rib; 6. V-groove; 7. Slot; 8. Block; 9. Flat surface; 10. Flat plate; 11. First insert rod; 12. First insertion hole; 13. Second insert rod; 14. Second insertion hole; 15. Reinforcing frame. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0035] According to an embodiment of the present invention, in one aspect, a plastic frame for a sub-high efficiency air filter is provided for fixing the filter element. The plastic frame for the sub-high efficiency air filter includes:

[0036] Two cover plates 3 are arranged opposite each other, and filter element grooves are respectively provided on the opposite wall surfaces of the two cover plates 3. The filter element grooves are used to insert filter elements.

[0037] Multiple first support bars 1 are arranged side by side on the air inlet side of two cover plates 3. The first support bars 1 are divided into single-groove support bars 101 and double-groove support bars 102. The first support bars 1 are adapted to abut against the filter element.

[0038] Multiple second support bars 2 are provided on the air outlet side of the two cover plates 3 and are adapted to abut against the filter element;

[0039] A reinforcing frame 15 is fixedly connected to the side of the single-groove support bar 101. The two ends of the reinforcing frame 15 are fixedly connected to two cover plates 3 respectively. The walls of the double-groove support bar 102 and the second support bar 2 away from the filter element are provided with longitudinal ribs 4 and multiple X-shaped reinforcing ribs 5.

[0040] The plastic frame for the sub-high efficiency air filter provided in this embodiment improves the strength of the single groove support bar 101 by setting a reinforcing frame 15, and improves the strength of the double groove support bar 102 and the second support bar 2 by setting longitudinal ribs 4 and X-shaped reinforcing ribs 5 on the wall surface away from the filter element. This makes the first support bar 1 and the second support bar 2 less prone to bending deformation or damage when subjected to impact.

[0041] Specifically, two cover plates 3 are symmetrically arranged, and two filter element grooves on each cover plate 3 are symmetrically arranged. The direction from one cover plate 3 to the other cover plate 3 is defined as the first direction. The length direction of the first support bar 1 is parallel to the first direction, and the arrangement direction of multiple first support bars 1 is parallel to the direction from the air inlet side to the air outlet side. The length direction of the second support bar 2 is parallel to the length direction of the first support bar 1, and the arrangement direction of multiple second support bars 2 is parallel to the arrangement direction of multiple first support bars 1. The single-groove support bar 101 has a groove extending along its length on the side facing the filter element, and the double-groove support bar 102 has two grooves extending along its length on the side facing the filter element, and these two grooves are arranged side-by-side along the arrangement direction of the first support bars 1. The structural form of the second support bar 2 is the same as that of the double-groove support bar 102. By fixing a reinforcing frame 15 to the side of the single-groove support bar 101, and setting longitudinal ribs 4 and multiple X-shaped reinforcing ribs 5 on the wall surface of the double-groove support bar 102 and the second support bar 2 away from the filter element, the structural strength of the first support bar 1 and the second support bar 2 is improved, so as to avoid bending or damage when subjected to a large impact (such as falling or bumping during installation).

[0042] In one embodiment, combined Figures 1 to 3 as well as Figure 4 As shown, the longitudinal rib 4 extends along the length direction of the double-groove support bar 102 or the second support bar 2, and multiple X-shaped reinforcing ribs 5 are spaced apart along the extension direction of the longitudinal rib 4.

[0043] Specifically, the longitudinal rib 4 is disposed in the middle of the double-groove support bar 102 or the second support bar 2, and the length of the longitudinal rib 4 is adapted to the length of the double-groove support bar 102 or the second support bar 2. Either of the two sub-ribs of the plurality of X-shaped reinforcing ribs 5 is arranged at an angle to the longitudinal rib 4. Preferably, the plurality of X-shaped reinforcing ribs 5 on the same double-groove support bar 102 or the second support bar 2 are arranged at equal intervals.

[0044] In one embodiment, the included angle between the two sub-ribs of the X-shaped reinforcing rib 5 is 45° to 90°.

[0045] The plastic frame for the sub-high efficiency air filter provided in this embodiment has two sub-ribs of the X-shaped reinforcing rib with a large angle to cover a larger area, which facilitates the enhancement of the overall strength of the double groove support bar 102 and the second support bar 2.

[0046] For example, in some embodiments, the included angle between the two sub-ribs of the X-shaped reinforcing rib 5 can be 45° or 50° or 55° or 60° or 65° or 70° or 75° or 80° or 85° or 90°, or it can be a range formed by any two of the above values.

[0047] In one embodiment, combined Figures 1 to 3 as well as Figure 4 As shown, the walls of the double-groove support bar 102 and the second support bar 2 away from the filter element are V-shaped.

[0048] The plastic frame for the sub-high efficiency air filter provided in this embodiment improves the bending resistance of the double groove support bar 102 and the second support bar 2 by making the wall surface of the double groove support bar 102 and the second support bar 2 away from the filter element V-shaped.

[0049] In one embodiment, combined Figures 1 to 4 As shown, the filter element groove includes multiple V-shaped grooves 6, the arrangement direction of the multiple V-shaped grooves 6 is parallel to the arrangement direction of the multiple first support bars 1, and the two ends of two adjacent V-shaped grooves 6 are connected.

[0050] Specifically, a first slot is provided at the two mutually distant ends of the two V-shaped grooves 6 located at both ends of the filter element groove. The first slot is suitable for the insertion of the end of the single-groove support bar 101. A second slot is provided at the connection between the ends of two adjacent V-shaped grooves 6 and at the tip of the V-shaped groove 6. The second slot is suitable for the insertion of the end of the double-groove support bar 102 or the second support bar 2.

[0051] In one embodiment, combined Figure 1 and Figure 6 As shown, slots 7 are respectively provided at both ends of the first support bar 1 and the second support bar 2. Multiple locking blocks 8 are provided on the cover plate 3. The locking blocks 8 are fixedly set on the side wall of the filter element groove and located on the side of the first support bar 1 or the second support bar 2 away from the filter element. Each locking block 8 is suitable for engaging with a slot 7.

[0052] Specifically, the card block 8 is disposed on the end wall of the filter element groove along the air inlet direction, and the card slot 7 is opened on the end wall of the first support bar 1 and the second support bar 2 along the air inlet direction.

[0053] In one embodiment, combined Figures 4 to 6 As shown, the sidewalls at the ends and tips of the V-groove 6 are provided with flat surfaces 9, the locking block 8 is fixedly set on the flat surfaces 9, and the ends of the first support bar 1 and the second support bar 2 are respectively provided with flat plates 10, the locking groove 7 is opened on the flat plates 10, and the flat plates 10 are adapted to form surface contact with the flat surfaces 9.

[0054] The plastic frame for the sub-high efficiency air filter provided in this embodiment has a flat surface 9 at the end and tip of the V-groove 6. Flat plates 10 are provided at both ends of the first support bar 1 and the second support bar 2. The flat plates 10 are in contact with the flat surface 9 to increase the contact area and improve the stability of the abutment and snap-fit.

[0055] In one embodiment, combined Figure 4 and Figure 5 As shown, a first insertion rod 11 is provided between the two adjacent ends of two adjacent V-shaped grooves 6, and a first insertion hole 12 is opened at both ends of the double groove support bar 102 and the second support bar 2 respectively corresponding to the first insertion rod 11.

[0056] Specifically, the axis of the first insertion rod 11 is parallel to the first direction. During the process of inserting the end of the double-slot support bar 102 or the second support bar 2 into the second slot along the first direction, the first insertion rod 11 is inserted into the first insertion hole 12, and the locking block 8 is engaged with the locking groove 7. The engagement between the locking block 8 and the locking groove 7 is used to prevent the double-slot support bar 102 or the second support bar 2 from disengaging from the second slot along the first direction.

[0057] In one embodiment, combined Figure 4 and Figure 6 As shown, the reinforcing frame 15 has a second insertion hole 14 at each end, and the cover plate 3 has a second insertion rod 13 in front of the second insertion hole 14.

[0058] Specifically, the second insertion hole 14 is located at the end of the reinforcing frame 15, and the length direction of the second insertion rod 13 is parallel to the first direction. During the process of inserting the end of the single-slot support bar 101 into the first slot along the first direction, the second insertion rod 13 is inserted into the second insertion hole 14, and the locking block 8 is engaged with the locking groove 7. The engagement between the locking block 8 and the locking groove 7 is used to prevent the single-slot support bar 101 from disengaging from the first slot along the first direction.

[0059] According to an embodiment of the present invention, another aspect provides a sub-high efficiency air filter, comprising: the aforementioned plastic frame for a sub-high efficiency air filter.

[0060] The sub-high efficiency air filter includes a plastic frame and a filter element. The filter element is inserted into the filter element groove. The first support bar 1 and the second support bar 2 respectively abut against the two ends of the filter element along the air inlet direction, thereby fixing the filter element in place by the plastic frame.

[0061] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A plastic frame for a sub-high efficiency air filter, characterized in that, The plastic frame for the sub-HEPA air filter, used to fix the filter element, includes: Two cover plates (3) are arranged opposite each other, and filter element grooves are respectively provided on the opposite wall surfaces of the two cover plates (3), and the filter element grooves are used to insert the filter element; Multiple first support bars (1) are arranged side by side on the air inlet side of the two cover plates (3). The first support bars (1) are divided into single-groove support bars (101) and double-groove support bars (102). The first support bars (1) are adapted to abut against the filter element. Multiple second support bars (2) are disposed on the air outlet side of the two cover plates (3) and are adapted to abut against the filter element; The single-groove support bar (101) is fixedly connected to a reinforcing frame (15) on its side. The two ends of the reinforcing frame (15) are fixedly connected to two cover plates (3) respectively. The double-groove support bar (102) and the second support bar (2) are provided with longitudinal ribs (4) and multiple X-shaped reinforcing ribs (5) on the wall surface away from the filter element.

2. The plastic frame for a sub-high efficiency air filter according to claim 1, characterized in that, The longitudinal rib (4) extends along the length direction of the double-groove support bar (102) or the second support bar (2), and a plurality of X-shaped reinforcing ribs (5) are spaced apart along the extension direction of the longitudinal rib (4).

3. The plastic frame for a sub-high efficiency air filter according to claim 2, characterized in that, The angle between the two sub-ribs of the X-shaped reinforcing bar (5) is 45° to 90°.

4. The plastic frame for a sub-high efficiency air filter according to claim 1, characterized in that, The double-groove support bar (102) and the second support bar (2) are V-shaped away from the wall surface of the filter element.

5. The plastic frame for a sub-high efficiency air filter according to claim 1, characterized in that, The filter element groove includes multiple V-shaped grooves (6), the arrangement direction of the multiple V-shaped grooves (6) is parallel to the arrangement direction of the multiple first support bars (1), and the two ends of two adjacent V-shaped grooves (6) are connected.

6. The plastic frame for a sub-high efficiency air filter according to claim 5, characterized in that, The first support bar (1) and the second support bar (2) are respectively provided with slots (7) at both ends. The cover plate (3) is provided with multiple blocks (8). The blocks (8) are fixedly disposed on the side wall of the filter element groove and located on the side of the first support bar (1) or the second support bar (2) away from the filter element. Each block (8) is adapted to engage with one of the slots (7).

7. The plastic frame for a sub-high efficiency air filter according to claim 6, characterized in that, The sidewalls at the ends and tips of the V-groove (6) are provided with flat surfaces (9), the card block (8) is fixedly disposed on the flat surfaces (9), and the ends of the first support bar (1) and the second support bar (2) are respectively provided with flat plates (10), the card groove (7) is opened on the flat plates (10), and the flat plates (10) are adapted to form surface contact with the flat surfaces (9).

8. The plastic frame for a sub-high efficiency air filter according to claim 7, characterized in that, A first insertion rod (11) is provided between the two adjacent ends of two adjacent V-shaped grooves (6), and the two ends of the double groove support bar (102) and the second support bar (2) are respectively provided with first insertion holes (12) corresponding to the first insertion rod (11).

9. The plastic frame for a sub-high efficiency air filter according to claim 1, characterized in that, The reinforcing frame (15) has a second insertion hole (14) at each end, and the cover plate (3) has a second insertion rod (13) in the second insertion hole (14).

10. A sub-high efficiency air filter, characterized in that, include: The plastic frame for a sub-high efficiency air filter according to any one of claims 1 to 9.

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