A high-efficiency air filter element and a quick-disassembly high-efficiency air filter

Abstract

The present invention relates to a high-efficiency air filter element and a quick-detachable high-efficiency air filter, and specifically to a high-efficiency air filter element and a quick-detachable high-efficiency air filter, including a mounting shell, on which a high-efficiency air filter element is detachably connected; the mounting shell includes a first side mounting shell and a second side mounting shell, the bottoms of the first side mounting shell and the second side mounting shell are connected by a length adjustment device, and the first side mounting shell and the second side mounting shell are both provided with an arc-shaped bearing platform for carrying the filter element, and the annular end cover on the filter element is provided on the bearing platform on the first side mounting shell; the present invention relates to a quick-detachable high-efficiency air filter, which has a simple structure, occupies a small space, is light in weight, and is convenient and quick to disassemble and connect. The first side mounting shell is connected to the ventilation system interface by a clamp, and the second side mounting shell is connected to any structure of the ventilation system by two screws.

Description

Technical Field

[0001] The invention relates to the field of air filtration, and in particular to a high-efficiency air filter element and a quickly disassembled high-efficiency air filter. Background Art

[0002] High-efficiency air filters are used for air purification. They are widely used in the air supply terminal of air conditioners in dust-free purification workshops in optical electronics, LCD manufacturing, biomedicine, precision instruments, beverages and foods, PCB printing and other industries; in air transportation, they are used in the cabin recirculation ventilation system to filter suspended particles such as bacteria, viruses, and dust in the cabin. High-efficiency air filters consist of two parts: a filter element and a mounting shell. The general mounting shell is independently installed in the ventilation system. It is a truss structure with a complex structure, large space occupation, and heavy weight. In some systems with relatively small spaces, it is difficult to set up the shell and install and remove the filter element. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a high-efficiency air filter element and a quickly disassembled high-efficiency air filter which are simple in structure, easy to use and can be quickly disassembled.

[0004] The invention discloses a high-efficiency air filter element, comprising a cylindrical inner frame and an outer frame, wherein the outer frame is sleeved outside the inner frame, and an annular columnar filter layer is arranged in the area between the outer frame and the inner frame; one end of the outer frame is fixedly connected to the inner frame through an annular end cover, the central part of the annular end cover is an air outlet, and the other end of the outer frame is fixedly connected to the inner frame through a circular blocking end cover;

[0005] The filter layer is made of glass fiber filter paper, and the filter layer is folded back and forth in a corrugated shape and connected end to end to form a ring column structure, and the ratio of the filter layer fold height H to the filter layer fold width W is K1=H / W, wherein 11.8≦K1≦13.1;

[0006] An annular sealing ring is arranged on the side of the annular end cover facing away from the filter layer.

[0007] Preferably, the folded height H of the filter layer is 34 mm to 38 mm, the folded width W of the filter layer is 2.6 mm to 3.2 mm, and the outer diameter D of the filter layer is 160 mm to 180 mm.

[0008] A quick-detachable high-efficiency air filter comprises a mounting shell, on which a high-efficiency air filter element is detachably connected;

[0009] The mounting shell comprises a first side mounting shell and a second side mounting shell, the bottoms of the first side mounting shell and the second side mounting shell are connected by a length adjustment device, and the first side mounting shell and the second side mounting shell are both provided with an arc-shaped bearing platform for bearing the filter element, the annular end cap on the filter element is arranged on the bearing platform on the first side mounting shell, and the circular blocking end cap on the filter element is arranged on the bearing platform on the second side mounting shell;

[0010] A clamping device is rotatably connected to the second side mounting shell, and the clamping device is connected to the first side mounting shell through a tensioning device. An annular sealing clamping boss is provided on the side of the first side mounting shell facing the filter element, and the annular sealing clamping boss is matched and sealed with an annular sealing ring.

[0011] Preferably, the length adjustment device includes a connecting screw rod, both ends of which are connected to a limit nut through an external thread set on the connecting screw rod, and corresponding positions of the first side mounting shell and the second side mounting shell are provided with a connecting through hole, and both ends of the connecting screw rod are respectively passed through the connecting through holes on the first side mounting shell and the second side mounting shell and are threadedly connected with locking nuts, and the distance between the two limit nuts is adjusted to increase or decrease the distance between the first side block body and the second side block body.

[0012] Preferably, a rotation preventing structure is provided on the locking nut.

[0013] Preferably, the anti-rotation structure includes a cotter pin, the locking nut is a hexagonal slotted nut, and an anti-rotation through hole is provided on the connecting screw rod at the position where the locking nut is connected. After the hexagonal slotted nut is connected to the connecting screw rod, the cotter pin passes through the anti-rotation through hole and is fixedly connected to the connecting screw rod.

[0014] Preferably, the clamping device includes a pressure plate, which is rotatably connected to the second side mounting shell, and a pressure regulating spring is fixedly arranged on the side of the pressure plate facing the filter element, and the end of the pressure regulating spring away from the pressure plate abuts against the circular sealing end cover of the filter element.

[0015] Preferably, the tensioning device includes a pull rod, one end of which is axially fixedly connected to the pressure plate through a limiting groove, and the other end of the pull rod passes through the first side mounting shell and is threadedly connected to an adjusting nut, and an anti-loosening device is provided on the adjusting nut.

[0016] Preferably, a limit stopper is provided on one end of the pull rod connected to the pressure plate, a first limit lug is fixedly provided at the edge of the pressure plate, a limit groove matching the limit stopper is provided on the first limit lug, and the pull rod is axially fixedly connected to the pressure plate through the limit groove on the first limit lug;

[0017] A second limiting ear is provided at a position of the first side mounting housing corresponding to the first limiting ear, the pull rod passes through the second limiting ear and is threadedly connected to the adjusting nut, and a limiting protrusion is provided at the end of the second limiting ear along the radial direction of the filter element for preventing the adjusting nut from falling off;

[0018] The first limiting ear and the second limiting ear have arc-shaped surfaces facing the filter element, the arc shape matches the circumference of the filter element, and the distance between the first limiting ear and the second limiting ear is smaller than the distance between the pressure plate and the first side mounting shell.

[0019] Preferably, two pull rods are provided, and the two pull rods and the connecting screw rod are evenly distributed along the circumference of the filter element;

[0020] The anti-loosening device includes a fuse and a disc fixed on the adjusting nut, the axis of the disc is located on the same straight line as the central axis of the pull rod, a plurality of fixing holes are evenly distributed along the circumference of the disc, and the first limiting lugs are provided with fixing holes, and the fixing holes of the first limiting lugs are fixedly connected to the fixing holes on the disc by tying a knot through the fuse.

[0021] The present invention discloses a quick-detachable high-efficiency air filter, which has a simple structure, occupies a small space, is light in weight, and is convenient and quick to disassemble and connect. The first side mounting shell is connected to the ventilation system interface by a clamp, and the second side mounting shell is connected to any structure of the ventilation system by two screws. The filter element is installed between the first side mounting shell and the second side mounting shell, and the filter element and the mounting shell are connected as a whole by a length adjustment device. Quick connection and disassembly of the filter element and the mounting shell are achieved. The length adjustment device is an adjustable mounting pressure mechanism, which avoids loosening of the filter element and the mounting shell due to assembly clearance. One end of the pull rod is limited to the shell to prevent the pull rod from falling off, and the other end is provided with an adjusting nut, and the adjusting nut has a fuse fixing hole. The fuse is used to prevent the device from falling off and causing failure when used in a vibrating environment.

[0022] The filter element has a key performance indicator "flow resistance". Too much resistance will affect the air supply at the end of the filter element, thus affecting the use effect of the filter element. Therefore, reducing the flow resistance of the filter element is the key to the performance of the filter element. The flow resistance of the filter element is determined by the filter layer structure resistance (K1) and the filter layer material resistance (K2). The calculation formula of the filter element flow resistance is: p=ζρν 2 / 2{where ζ is the filter layer flow resistance coefficient {ζ=f(K1, K2)}, ρ is the air density, and ν is the air flow rate through the filter element}. After setting v, ζ determines the key parameter of the filter element resistance. When the filter layer material (K2 is a constant) is determined, the filter layer structure resistance K1 is the core factor. When the ratio of the filter layer fold height (H) and the filter layer fold width (W) is K1 (K1=H / W), 11.8≦K1≦13.1, the flow resistance of the entire filter element can be optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the cross section of the filter layer.

[0024] Figure 2 It is a schematic diagram of the structure of the present invention.

[0025] Figure 3 for Figure 2 Top view of the .

[0026] Figure 4 for Figure 2 Left view of .

[0027] Figure 5 for Figure 2 Right view of .

[0028] Figure 6 for Figure 1 Schematic diagram of the connection relationship between the middle disc and the limiting protrusion.

[0029] Figure markings: 1-first side mounting shell, 2-second side mounting shell, 3-connecting screw, 4-pressure plate, 5-pressure adjusting spring, 6-circular sealing end cover, 7-annular end cover, 8-pull rod, 9-limit stopper, 10-first limit ear, 11-second limit ear, 12-disc, 13-filter element, 14-limiting protrusion. DETAILED DESCRIPTION

[0030] The present invention discloses a high-efficiency air filter element, comprising a cylindrical inner frame and an outer frame, wherein the outer frame is sleeved outside the inner frame, and an annular columnar filter layer is arranged in the area between the outer frame and the inner frame; one end of the outer frame is fixedly connected to the inner frame through an annular end cap 7, the central part of the annular end cap 7 is an air outlet, and the other end of the outer frame is fixedly connected to the inner frame through a circular blocking end cap 6;

[0031] The filter layer is made of glass fiber filter paper, and the filter layer is folded back and forth in a corrugated shape and connected end to end to form a ring column structure, and the ratio of the filter layer fold height H to the filter layer fold width W is K1=H / W, wherein 11.8≦K1≦13.1;

[0032] An annular sealing ring is arranged on the side of the annular end cover 7 facing away from the filter layer.

[0033] Preferably, the folded height H of the filter layer is 34 mm to 38 mm, the folded width W of the filter layer is 2.6 mm to 3.2 mm, and the outer diameter D of the filter layer is 160 mm to 180 mm.

[0034] A quick-detachable high-efficiency air filter comprises a mounting shell, to which a high-efficiency air filter element 13 is detachably connected;

[0035] The mounting shell comprises a first side mounting shell 1 and a second side mounting shell 2, the bottoms of the first side mounting shell 1 and the second side mounting shell 2 are connected via a length adjustment device, and arc-shaped bearing platforms for bearing the filter element 13 are arranged on the first side mounting shell 1 and the second side mounting shell 2, the annular end cap 7 on the filter element 13 is arranged on the bearing platform on the first side mounting shell 1, and the circular blocking end cap 6 on the filter element 13 is arranged on the bearing platform on the second side mounting shell 2;

[0036] A clamping device is rotatably connected to the second side mounting shell 2, and the clamping device is connected to the first side mounting shell 1 through a tensioning device. An annular sealing clamping boss is provided on the side of the first side mounting shell 1 facing the filter element 13, and the annular sealing clamping boss is matched and sealed with an annular sealing ring.

[0037] Preferably, the length adjustment device includes a connecting screw rod 3, both ends of which are connected with a limit nut through an external thread set on the connecting screw rod 3, and the corresponding positions of the first side mounting shell 1 and the second side mounting shell 2 are provided with a connecting through hole, and the two ends of the connecting screw rod 3 are respectively passed through the connecting through holes on the first side mounting shell 1 and the second side mounting shell 2 and are threadedly connected with locking nuts, and the distance between the two limit nuts is adjusted to increase or decrease the distance between the first side block body and the second side block body.

[0038] Preferably, a rotation preventing structure is provided on the locking nut.

[0039] Preferably, the anti-rotation structure includes a cotter pin, the locking nut is a hexagonal slotted nut, and an anti-rotation through hole is provided on the connecting screw rod 3 at the position where the locking nut is connected. After the hexagonal slotted nut is connected to the connecting screw rod 3, the cotter pin passes through the anti-rotation through hole and is fixedly connected to the connecting screw rod 3.

[0040] Preferably, the clamping device includes a pressure plate 4, which is rotatably connected to the second side mounting shell 2, and a pressure regulating spring 5 is fixedly arranged on the side of the pressure plate 4 facing the filter element 13, and the end of the pressure regulating spring 5 away from the pressure plate 4 is against the circular sealing end cover 6 of the filter element 13.

[0041] Preferably, the tensioning device includes a pull rod 8, one end of which is axially fixedly connected to the pressure plate 4 through a limiting groove, and the other end of the pull rod 8 passes through the first side mounting shell 1 and is threadedly connected to an adjusting nut, and an anti-loosening device is provided on the adjusting nut.

[0042] Preferably, a limit stopper 9 is provided on one end of the pull rod 8 connected to the pressure plate 4, a first limit lug 10 is fixedly provided at the edge of the pressure plate 4, a limit groove matching the limit stopper 9 is provided on the first limit lug 10, and the pull rod 8 is axially fixedly connected to the pressure plate 4 through the limit groove on the first limit lug 10;

[0043] A second limiting ear 11 is provided at a position of the first side mounting housing 1 corresponding to the first limiting ear 10, the pull rod 8 passes through the second limiting ear 11 and is threadedly connected to the adjusting nut, and a limiting protrusion 14 is provided at the radial end of the filter element 13 for preventing the adjusting nut from falling off;

[0044] The first limiting ear 10 and the second limiting ear 11 have arc-shaped surfaces facing the filter element 13 , and the arc matches the circumference of the filter element 13 . The distance between the first limiting ear 10 and the second limiting ear 11 is smaller than the distance between the pressure plate 4 and the first side mounting shell 1 .

[0045] Preferably, two pull rods 8 are provided, and the two pull rods 8 and the connecting screw rod 3 are evenly distributed along the circumference of the filter element 13;

[0046] The anti-loosening device includes a fuse and a disc 12 fixedly arranged on the adjusting nut, the axis of the disc 12 is located on the same straight line as the central axis of the pull rod 8, a plurality of fixing holes are evenly distributed on the disc 12 along the circumference of the disc 12, and the first limiting ear 10 is provided with a fixing hole, and the fixing hole of the first limiting ear 10 is fixedly connected to the fixing hole on the disc 12 by tying a knot through the fuse.

[0047] When in use, the first side mounting shell 1 of the filter mounting shell needs to be assembled, connected and fixed with a clamp to the interface of the assembled system, and the second side mounting shell 2 needs to be connected and fixed with two screws to the structure of the assembled system. After the filter mounting shell is fixed in the assembled system, rotate and open the rotating pressure plate 4 on the second side mounting shell 2, and place the filter element 13 with one end of the annular end cover 7 facing the first side mounting plate. The circumferential surfaces of the annular end covers 7 at both ends of the filter element 13 are placed on the arc-shaped supporting platforms of the first side mounting shell 1 and the second side mounting shell 2, and then rotate and close the pressure plate 4, install the two pull rods 8 on the first side mounting shell 1 and the second side mounting shell 2, and lock them with the adjusting nut. After locking, use a fuse to fix the adjusting nut on the second limit ear 11 of the first side mounting shell 1.

[0048] The present invention discloses a quick-disassembly high-efficiency air filter with a simple structure, small space occupation, light weight, and convenient and quick disassembly and connection. The first side mounting shell 1 is connected to the ventilation system interface by a clamp, and the second side mounting shell 2 is connected to any structure of the ventilation system by two screws. The filter element 13 is installed between the first side mounting shell 1 and the second side mounting shell 2, and the filter element 13 and the mounting shell are connected as a whole through a length adjustment device. Quick connection and disassembly of the filter element 13 and the mounting shell are achieved. The length adjustment device is an adjustable mounting pressure mechanism, which avoids loosening of the filter element 13 and the mounting shell due to assembly clearance. One end of the pull rod 8 is limitedly protected with the shell to prevent the pull rod 8 from falling off, and the other end is provided with an adjusting nut, and the adjusting nut has a fuse fixing hole. The fuse is used to prevent the device from falling off and causing failure when used in a vibrating environment.

[0049] The filter element 13 has a key performance indicator "flow resistance". Too much resistance will affect the air supply at the end of the filter element 13, thereby affecting the use effect of the filter element 13. Therefore, reducing the flow resistance of the filter element 13 is the key to the performance of the filter element 13. The flow resistance of the filter element 13 is determined by the filter layer structure resistance K1 and the filter layer material resistance K2. The calculation formula for the flow resistance of the filter element 13 is: p=ζρν 2 / 2, where ζ is the filter layer resistance coefficient ζ=f(K1, K2), ρ is the air density, ν is the air flow rate through the filter element 13, and the filter layer effective filtration area}. After setting v and S, ζ determines the key parameter of the flow resistance of the filter element 13. When the filter layer material is determined, that is, K2 is a constant, the filter layer structure resistance K1 is the core factor. When the ratio of the filter layer fold height H and the filter layer fold width W K1=H / W is in the range of 11.8 to 13.1, ζ has a minimum value. The minimum value is found by combining the extreme value search algorithm and the test results, so that the flow resistance of the entire filter element can be optimized. Table 1 shows some of the values ​​listed during the test, and P is the minimum flow resistance of the filter element.

[0050] Table 1 Filter layer and flow resistance test data during the test

[0051] Serial number H W P H / W 1# 34 2.6 83 13.1 2# 36 2.8 86 12.9 3# 38 3.2 78 11.8

Claims

1. A quick-disassembly high-efficiency air filter, characterized in that: It comprises a mounting shell, on which a high-efficiency air filter element is detachably connected; The high-efficiency air filter element comprises a cylindrical inner frame and an outer frame, wherein the outer frame is sleeved outside the inner frame, and an annular columnar filter layer is arranged in the area between the outer frame and the inner frame; the feature is that one end of the outer frame is fixedly connected to the inner frame via an annular end cap (7), the central part of the annular end cap (7) is an air outlet, and the other end of the outer frame is fixedly connected to the inner frame via a circular blocking end cap (6); The filter layer is made of glass fiber filter paper, and the filter layer is folded back and forth in a corrugated shape and connected end to end to form a ring column structure, and the ratio of the filter layer fold height H to the filter layer fold width W is K1=H / W, wherein 11.8≦K1≦13.1; An annular sealing ring is provided on a side of the annular end cover (7) facing away from the filter layer; The mounting shell comprises a first side mounting shell (1) and a second side mounting shell (2); the first side mounting shell (1) and the second side mounting shell (2) are connected at the bottom via a length adjustment device; the first side mounting shell (1) and the second side mounting shell (2) are both provided with an arc-shaped bearing platform for bearing the filter element (13); the annular end cover (7) on the filter element (13) is arranged on the bearing platform on the first side mounting shell (1); and the circular blocking end cover (6) on the filter element (13) is arranged on the bearing platform on the second side mounting shell (2); A clamping device is rotatably connected to the second side mounting shell (2), and the clamping device is connected to the first side mounting shell (1) via a tensioning device. An annular sealing clamping boss is provided on a surface of the first side mounting shell (1) facing the filter element (13), and the annular sealing clamping boss is matched and sealed with an annular sealing ring; The length adjustment device comprises a connecting screw rod (3), both ends of the connecting screw rod (3) are connected to a limit nut via an external thread provided on the connecting screw rod (3), corresponding positions of the first side mounting shell (1) and the second side mounting shell (2) are provided with a connecting through hole, and both ends of the connecting screw rod (3) are respectively passed through the connecting through holes on the first side mounting shell (1) and the second side mounting shell (2) and are threadedly connected to a locking nut, and the distance between the two limit nuts is adjusted, so that the distance between the first side stop body and the second side stop body increases or decreases; The pressing device comprises a pressing plate (4), the pressing plate (4) being rotatably connected to the second side mounting shell (2), a pressure regulating spring (5) being fixedly arranged on a surface of the pressing plate (4) facing the filter element (13), and an end of the pressure regulating spring (5) away from the pressing plate (4) being in contact with a circular blocking end cover (6) of the filter element (13); The tensioning device comprises a pull rod (8), one end of the pull rod (8) being axially fixedly connected to the pressure plate (4) via a limiting groove, and the other end of the pull rod (8) passing through the first side mounting shell (1) and being threadedly connected to an adjusting nut, wherein an anti-loosening device is provided on the adjusting nut.

2. A quick-disassembly high-efficiency air filter as claimed in claim 1, characterized in that: The folded height H of the filter layer is 34 mm to 38 mm, the folded width W of the filter layer is 2.6 mm to 3.2 mm, and the outer diameter D of the filter layer is 160 mm to 180 mm.

3. A quick-disassembly high-efficiency air filter as claimed in claim 1, characterized in that: The locking nut is provided with a rotation preventing structure.

4. A quick-disassembly high efficiency air filter as claimed in claim 3, characterized in that: The anti-rotation structure comprises a cotter pin, the locking nut is a hexagonal slotted nut, an anti-rotation through hole is provided on the connecting screw rod (3) at a position where the locking nut is connected, and after the hexagonal slotted nut is connected to the connecting screw rod (3), the cotter pin passes through the anti-rotation through hole and is fixedly connected to the connecting screw rod (3).

5. A quick-disassembly high efficiency air filter as claimed in claim 1, characterized in that: A limit stopper (9) is arranged on one end of the pull rod (8) connected to the pressure plate (4); a first limit lug (10) is fixedly arranged at the edge of the pressure plate (4); a limit groove matching the limit stopper (9) is arranged on the first limit lug (10); the pull rod (8) is axially fixedly connected to the pressure plate (4) via the limit groove on the first limit lug (10); The first side mounting housing (1) is provided with a second limiting ear (11) at a position corresponding to the first limiting ear (10); the pull rod (8) passes through the second limiting ear (11) and is threadedly connected to the adjusting nut; the second limiting ear (11) is provided with a limiting protrusion (14) at the radial end of the filter element (13) for preventing the adjusting nut from falling off; The first limiting ear (10) and the second limiting ear (11) have arc-shaped surfaces facing the filter element (13), the arc-shaped surfaces match the peripheral surface of the filter element (13), and the distance between the first limiting ear (10) and the second limiting ear (11) is smaller than the distance between the pressure plate (4) and the first side mounting shell (1).

6. A quick-disassembly high efficiency air filter as claimed in claim 5, characterized in that: The pull rods (8) are provided in two numbers, and the two pull rods (8) and the connecting screw rod (3) are evenly distributed along the circumference of the filter element (13); The anti-loosening device comprises a fuse and a disc (12) fixedly arranged on the adjusting nut, the axis of the disc (12) and the central axis of the pull rod (8) are located on the same straight line, a plurality of fixing holes are evenly distributed along the circumference of the disc (12), and the first limit ear (10) is provided with a fixing hole, and the fixing hole of the first limit ear (10) is fixedly connected to the fixing hole on the disc (12) by tying a knot through the fuse.

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