Plastic frame for sub-high efficiency air filter and sub-high efficiency air filter

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 a HEPA air filter. The plastic frame for the HEPA air filter includes: two cover plates arranged opposite each other, with filter element grooves respectively provided on the opposite walls of the two cover plates; a plurality of first support strips arranged side by side on the air inlet side of the two cover plates; a second support strip disposed on the air outlet side of the two cover plates; slots are respectively formed at both ends of the first and second support strips, and the cover plates are provided with corresponding locking blocks; at least some of the locking blocks are fixedly disposed with a support plate between them and the cover plates, the support plate being adapted to support the locking blocks and limiting the movement of the first or second support strips. The plastic frame for the HEPA air filter provided by this utility model improves the overall connection stability of the plastic frame by using the locking blocks and slots to engage with the first and second support strips respectively with the two cover plates.

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 it. For example, Chinese utility model patent CN205825387U discloses a HEPA filter frame comprising two isosceles trapezoidal side plates and a support strip inserted between them. 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 only connected to the side plates through the cooperation of insert rods and holes, and the abutment of support ribs, forming a plug-in connection. The connection stability between the support strip and the side plates is poor, and loosening or detachment is likely to occur in vibrating environments or during the transport and turnover of the plastic frame. Utility Model Content

[0003] In view of this, the present invention provides a plastic frame for a sub-high efficiency air filter and a sub-high efficiency air filter, to solve the problem that the two ends of the support bar and the side plate are only connected by the cooperation of the plug rod and the insertion hole and the abutment of the support rib, which results in poor connection stability between the support bar and the side plate. In the vibrating environment or during the turnover and transportation of the plastic frame, loosening or detachment is likely to occur.

[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 includes:

[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 cover plates, and the first support bars are adapted to abut against the filter element;

[0007] The second support strip is located on the air outlet side of the two covers and is adapted to abut against the filter element.

[0008] The first and second support bars are respectively provided with slots at both ends. Multiple locking blocks are fixedly provided on the cover plate. The locking blocks are located inside the filter element groove, and each locking block is suitable for engaging with a slot.

[0009] In one optional embodiment, the first support bar is divided into a single-groove support bar and a double-groove support bar, with two single-groove support bars and a double-groove support bar disposed between the two single-groove support bars; the wall surfaces of the double-groove support bar and the second support bar away from the filter element are V-shaped.

[0010] In one optional embodiment, a support plate is provided in the filter element groove corresponding to the double groove support bar and the second support bar, and the support plate is adapted to form a surface contact with the V-shaped wall surface.

[0011] In one alternative embodiment, longitudinal reinforcing ribs are provided on the wall surfaces of the double-groove support bar and the second support bar away from the filter element.

[0012] In one alternative embodiment, the support plate has a notch near the longitudinal stiffener, and an arc-shaped plate is provided at the notch, which is adapted to make way for the longitudinal stiffener.

[0013] In one alternative embodiment, the filter cartridge includes a plurality of V-shaped grooves, with adjacent V-shaped grooves of each filter cartridge connected end to end and arranged in a zigzag pattern.

[0014] In one alternative embodiment, a hollow portion is formed between the two channels of the V-shaped groove, and an inclined plate is provided in the hollow portion, the inclined plate being inclined along the depth direction of the V-shaped groove.

[0015] In one optional embodiment, a first insert rod is provided between the ends of two adjacent V-grooves, and a first insert rod is provided at the tip of the V-groove. The two ends of the double-groove support bar and the second support bar are provided with first insertion holes corresponding to the first insert rod.

[0016] In one optional embodiment, a second insertion hole is provided at each end of the single-groove support bar, and a second insertion rod is provided on the cover plate corresponding to the second insertion hole.

[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 overall connection stability of the plastic frame by means of the snap-fit ​​cooperation between the snap-fit ​​block and the snap-fit ​​groove, so that the first support strip and the second support strip are snap-fitted with the two cover plates respectively.

[0020] 2. 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 102 and the second support bar 2 by making the walls of the double groove support bar 102 and the second support bar 2 V-shaped.

[0021] 3. The plastic frame for a sub-high efficiency air filter provided by this utility model has a support plate 6 that makes surface contact with the double groove support bar and the second support bar 2, thereby increasing the force-bearing area and improving the stability of limiting the double groove support bar and the second support bar 2.

[0022] 4. The plastic frame for a sub-high efficiency air filter provided by this utility model further enhances the strength of the double groove support bar 102 and the second support bar 2 by setting longitudinal reinforcing ribs 9, thereby improving its bending resistance.

[0023] 5. The plastic frame for a sub-high efficiency air filter provided by this utility model improves the bending resistance of the two cover plates 3 by setting an inclined plate 8 in front of the two channels 71 of the V-groove 7.

[0024] 6. 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

[0025] 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.

[0026] 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 ;

[0027] 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 ;

[0028] Figure 3 for Figure 1 The diagram shown is a three-dimensional representation of a plastic frame concealing a cover for a sub-HEPA air filter. Figure 1 ;

[0029] Figure 4 for Figure 3 A magnified view of part A in the diagram;

[0030] Figure 5 for Figure 2 The diagram shown is a three-dimensional representation of a plastic frame for a sub-high efficiency air filter that conceals a single-groove support bar and a double-groove support bar.

[0031] Figure 6 for Figure 5 A magnified view of part B in the diagram;

[0032] Figure 7 for Figure 1 The diagram shown is a three-dimensional representation of a plastic frame concealing a cover for a sub-HEPA air filter. Figure 2 ;

[0033] Figure 8 for Figure 7 A magnified view of part C in the diagram.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. First support bar; 2. Second support bar; 101. Single-groove support bar; 102. Double-groove support bar; 3. Cover plate; 4. Slot; 5. Block; 6. Support plate; 7. V-groove; 71. Channel; 8. Inclined plate; 9. Longitudinal reinforcing rib; 10. First insert rod; 11. First insertion hole; 12. Arc plate; 13. Second insertion hole; 14. Second insert rod. Detailed Implementation

[0036] 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.

[0037] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0038] 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:

[0039] 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.

[0040] Multiple first support bars 1 are arranged side by side on the air inlet side of the two cover plates 3, and the first support bars 1 are adapted to abut against the filter element;

[0041] The second support bar 2 is located on the air outlet side of the two cover plates 3, and the second support bar 2 is adapted to abut against the filter element;

[0042] The first support bar 1 and the second support bar 2 are respectively provided with slots 4 at both ends. Multiple locking blocks 5 are fixedly provided on the cover plate 3. The locking blocks 5 are located inside the filter element groove, and each locking block 5 is suitable for engaging with a slot 4.

[0043] The plastic frame for a sub-high efficiency air filter provided in this embodiment uses the snap-fit ​​of the snap-fit ​​block 5 and the snap-fit ​​groove 4 to make the first support bar 1 and the second support bar 2 snap-fit ​​with the two cover plates 3 respectively, thereby improving the overall connection stability of the plastic frame.

[0044] Specifically, two cover plates 3 are symmetrically arranged, and two filter element slots on the two cover plates 3 are symmetrically arranged. The first support strip 1 and the second support strip 2 abut against the two ends of the filter element along the air inlet direction, thereby fixing the filter element inside the plastic frame. The length direction of the first support strip 1 is parallel to the length direction of the second support strip 2, and parallel to the direction from one cover plate 3 to the other cover plate 3. The arrangement direction of the multiple first support strips 1 is perpendicular to the direction from the air inlet side to the air outlet side. The slot 4 is opened on the wall surface where the first support strip 1 and the second support strip 2 are far apart. Furthermore, part of the slot 4 passes through the first support strip 1 or the second support strip 2 along a direction parallel to the air inlet direction.

[0045] In one embodiment, combined Figures 2 to 4 As shown, the first support bar 1 is divided into a single-groove support bar 101 and a double-groove support bar 102. There are two single-groove support bars 101, and multiple double-groove support bars 102 are arranged alternately between the two single-groove support bars 101. The double-groove support bars 102 and the second support bar 2 form a V-shape on the wall surface away from the filter element.

[0046] 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 walls of the double groove support bar 102 and the second support bar 2 V-shaped.

[0047] Specifically, the single-groove support bar 101 has a strip-shaped groove extending along its length, and a reinforcing rod 111 fixedly connected to the side of this strip-shaped groove. Two single-groove support bars 101 are respectively disposed at both ends of the filter element groove. The double-groove support bar 102 and the second support bar 2 have two strip-shaped grooves arranged side by side, and each strip-shaped groove has at least one retaining groove 4 at each end. Since the double-groove support bar and the second support bar 2 are only connected to the two cover plates 3 through their two ends, the stress is mainly concentrated at the two ends of the double-groove support bar and the second support bar 2. The middle area of ​​the double-groove support bar and the second support bar 2 is prone to deformation. By making the wall surface V-shaped, the bending resistance of the double-groove support bar and the second support bar 2 is enhanced.

[0048] In one embodiment, combined Figure 6As shown, a support plate 6 is provided in the filter element groove corresponding to the double groove support bar 102 and the second support bar 2. The support plate 6 is adapted to form a surface contact with the V-shaped wall surface.

[0049] The plastic frame for the sub-high efficiency air filter provided in this embodiment has a support plate 6 that makes surface contact with the double-groove support bar and the second support bar 2, thereby increasing the force-bearing area and improving the stability of limiting the double-groove support bar and the second support bar 2.

[0050] Specifically, there are multiple support plates 6, which are respectively disposed on the side of the double-groove support bar 102 and the second support bar 2 away from the filter element. After the filter element is installed, the filter element is located between the double-groove support bar 102 and the second support bar 2, and abuts against the double-groove support bar 102 and the second support bar 2 respectively. The support plates 6 abut against the side of the double-groove support bar 102 and the second support bar 2 away from the filter element, thereby improving the installation stability of the double-groove support bar 102 and the second support bar 2 on the plastic frame. As a feasible implementation, the locking block 5 corresponding to the locking slot 4 located on the double-groove support bar 102 and the second support bar 2 is fixedly disposed on the support plate 6. The support plate 6 is used to support the locking block 5 and to limit the movement of the double-groove support bar 102 or the second support bar 2 in the direction away from the filter element. The locking block 5 corresponding to the locking slot 4 located on the single-groove support bar 101 is directly fixedly disposed on the side wall of the filter element groove.

[0051] In one embodiment, combined Figures 1 to 5 As shown, both the double-groove support bar 102 and the second support bar 2 have longitudinal reinforcing ribs 9 on their walls away from the filter element.

[0052] The plastic frame for the sub-high efficiency air filter provided in this embodiment further enhances the strength of the double-groove support bar 102 and the second support bar 2 by setting longitudinal reinforcing ribs 9, thereby improving its bending resistance.

[0053] Specifically, the longitudinal reinforcing rib 9 is parallel to the length direction of the first support strip 1. Furthermore, the longitudinal reinforcing rib 9 is located at the tip of the V-shaped wall surface.

[0054] In one embodiment, combined Figure 6 As shown, the support plate 6 has a notch near the longitudinal reinforcing rib 9, and an arc plate 12 is provided at the notch. The arc plate 12 is suitable for making way for the longitudinal reinforcing rib 9.

[0055] Specifically, longitudinal reinforcing ribs 9 are respectively provided on the wall surfaces of the double-groove support bar and the second support bar 2 that are far apart from each other. Multiple support plates 6 are respectively provided on the side of the double-groove support bar and the second support bar 2 that are far apart from each other, and the arc-shaped surface of the arc plate 12 is adapted to the outer wall of the longitudinal reinforcing ribs 9. Furthermore, a notch is opened in the middle of the arc plate 12.

[0056] In one embodiment, combined Figure 1 and Figure 2 As shown, the filter element groove includes multiple V-shaped grooves 7, and adjacent V-shaped grooves 7 are connected end to end and arranged in a zigzag shape.

[0057] Specifically, the arrangement direction of the multiple V-grooves 7 is parallel to the arrangement direction of the multiple first support bars 1. The first support bars 1 are disposed at the ends of the V-grooves 7, and the number of second support bars 2 is the same as the number of V-grooves 7, and they are disposed at the tips of the V-grooves 7. Two single-groove support bars 101 are disposed at the two far apart ends of the two V-grooves 7 located at both ends of the filter element groove, and two-groove support bars 102 are disposed at the two close together ends of two adjacent V-grooves 7.

[0058] In one embodiment, combined Figures 1 to 3 As shown, a hollow section is formed between the two channels 71 of the V-shaped groove 7, and an inclined plate 8 is provided in the hollow section. The inclined plate 8 is inclined along the depth direction of the V-shaped groove 7.

[0059] The plastic frame for the sub-high efficiency air filter provided in this embodiment improves the bending resistance of the two cover plates 3 by setting an inclined plate 8 before the two channels 71 of the V-groove 7.

[0060] Specifically, the V-groove 7 includes two channels 71 extending at an angle, with their ends close to each other connected. An inclined plate 8 blocks the opening between the two channels 71.

[0061] In one embodiment, combined Figure 6 As shown, a first insertion rod 10 is provided between the ends of two adjacent V-shaped grooves 7, and a first insertion rod 10 is provided at the tip of the V-shaped groove 7. The two ends of the double groove support bar and the second support bar 2 are provided with first insertion holes 11 corresponding to the first insertion rod 10.

[0062] Specifically, the first insertion hole 11 is located at the longitudinal reinforcing rib 9, and the length direction of the first insertion rod 10 is parallel to the length direction of the double-groove support strip 102. When the double-groove support strip 102 and the second support strip 2 are installed on the cover plate 3, the first insertion rod 10 is inserted into the first insertion hole 11, and the locking block 5 is engaged in the locking groove 4.

[0063] In one embodiment, combined Figures 6 to 8 As shown, the two ends of the single-groove support bar 101 are respectively provided with second insertion holes 13, and the cover plate 3 is provided with a second insertion rod 14 corresponding to the second insertion holes 13.

[0064] Specifically, the second insertion hole 13 is opened at both ends of the reinforcing rod 111. When the single groove support bar 101 is installed on the cover plate 3, the second insertion rod 14 is inserted into the second insertion hole 13, and the locking block 5 is locked into the locking groove 4.

[0065] 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.

[0066] Specifically, the sub-high efficiency air filter includes the aforementioned plastic frame and a filter element installed within the plastic frame. The filter element is inserted into the filter element groove, and both ends of the filter element along the air inlet direction abut against the first support bar 1 and the second support bar 2, respectively. Furthermore, adhesive is applied to the filter element groove and to the side of the first support bar 1 and the second support bar 2 facing the filter element. The plastic frame is bonded and fixed to the filter element by the adhesive, thereby improving the overall stability of the plastic frame and the filter element.

[0067] 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), and the first support bars (1) are adapted to abut against the filter element; The second support strip (2) is provided on the air outlet side of the two cover plates (3), and the second support strip (2) is adapted to abut against the filter element; The first support bar (1) and the second support bar (2) are respectively provided with slots (4) at both ends. Multiple blocks (5) are fixedly provided on the cover plate (3). The blocks (5) are located inside the filter element groove. Each block (5) is adapted to engage with a slot (4).

2. The plastic frame for a sub-high efficiency air filter according to claim 1, characterized in that, The first support bar (1) is divided into a single-groove support bar (101) and a double-groove support bar (102). There are two single-groove support bars (101), and the double-groove support bar (102) is disposed between the two single-groove support bars (101). The double-groove support bar (102) and the second support bar (2) are V-shaped away from the wall of the filter element.

3. The plastic frame for a sub-high efficiency air filter according to claim 2, characterized in that, A support plate (6) is provided in the filter element groove corresponding to the double groove support bar (102) and the second support bar (2), and the support plate (6) is adapted to form a surface contact with the V-shaped wall surface.

4. The plastic frame for a sub-high efficiency air filter according to claim 3, characterized in that, Both the double-groove support bar and the second support bar (2) have longitudinal reinforcing ribs (9) on the wall surface away from the filter element.

5. The plastic frame for a sub-high efficiency air filter according to claim 4, characterized in that, The support plate (6) has a notch near the longitudinal reinforcing rib (9), and an arc plate (12) is provided at the notch. The arc plate (12) is adapted to make way for the longitudinal reinforcing rib (9).

6. The plastic frame for a sub-high efficiency air filter according to claim 2, characterized in that, The filter element groove includes multiple V-shaped grooves (7), and adjacent V-shaped grooves (7) of each filter element groove are connected end to end and arranged in a zigzag shape.

7. The plastic frame for a sub-high efficiency air filter according to claim 6, characterized in that, A hollow portion is formed between the two channels (71) of the V-shaped groove (7), and an inclined plate (8) is provided in the hollow portion. The inclined plate (8) is inclined along the depth direction of the V-shaped groove (7).

8. The plastic frame for a sub-high efficiency air filter according to claim 6, characterized in that, A first insertion rod (10) is provided between the ends of two adjacent V-grooves (7), and the first insertion rod (10) is provided at the tip of the V-grooves (7). The two ends of the double groove support bar and the second support bar (2) are provided with first insertion holes (11) corresponding to the first insertion rod (10).

9. The plastic frame for a sub-high efficiency air filter according to claim 2, characterized in that, The single-groove support bar is provided with a second insertion hole (13) at both ends, and the cover plate (3) is provided with a second insertion rod (14) corresponding to the second insertion hole (13).

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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