SE2251476A1 - A filter frame for an air filter and a sealing arrangement for an air filter arrangement - Google Patents
A filter frame for an air filter and a sealing arrangement for an air filter arrangementInfo
- Publication number
- SE2251476A1 SE2251476A1 SE2251476A SE2251476A SE2251476A1 SE 2251476 A1 SE2251476 A1 SE 2251476A1 SE 2251476 A SE2251476 A SE 2251476A SE 2251476 A SE2251476 A SE 2251476A SE 2251476 A1 SE2251476 A1 SE 2251476A1
- Authority
- SE
- Sweden
- Prior art keywords
- filter frame
- gasket
- elongated
- pressure source
- mounting structure
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 238000012544 monitoring process Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims description 4
- 239000002861 polymer material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3209—Details, e.g. container closure devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2271/02—Gaskets, sealings
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The disclosure relates to a filter frame (1) configured to hold an air filter media pack (2) and to be installed in a filter mounting structure (20), said filter frame comprising an outward surface (4) configured to be directed toward a mounting surface (21) of the mounting structure (20) when installed, and a first elongated gasket member (5) is arranged on the outward surface (4) of the filter frame, said first gasket member being configured to allow a protruding rib (22) on the mounting structure to be inserted into the first elongated gasket member (5) so as to form a seal, and wherein a second elongated gasket member (6) configured to abut and seal against the mounting structure is arranged on the outward surface of the filter frame and located on a distance from the first elongated gasket member (5), so as to allow an intermediate gasket space (7) to be formed when the filter frame is mounted in the mounting structure, said intermediate gasket space (7) then being confined by the first and second elongated gasket members (5,6), the outward surface (4) of the filter frame (1), and the mounting structure (20). The disclosure further relates to a sealing arrangement (1) for an air filter arrangement (20).
Description
Technical field The present disclosure relates to a filter frame for an air filter and a sealing arrangement for an air filter arrangement. More specifically, the disclosure relates to a filterframe configured to hold an air filter media pack and to be installed in a filter mounting structure and a sealing arrangement for an air filter arrangement as defined in the introductory parts of the independent claims.
Background art ln situations where it is necessary to seal off an interior space from the outside, seals or gaskets are commonly used to seal off gaps between structures that enclose such an interior space to prevent passage of unwanted substances such as particles, fluids, gas or other contaminants through the gap. Examples of this are shown in US2020/0032905A1 and US9352261B2, which disclose a gel seal arranged between a filter element and a filter housing in order to seal the filter element from the housing. The gel seal can thereby serve to keep the interior space clean, or to prevent unwanted substances from escaping from the interior space. ln cases where the sealed off interior space contains equipment and/or substances which are particularly sensitive to contaminants, or contains substances which are hazardous and cannot be allowed to escape into the surrounding environment, it may be especially important to ensure that the sealing is sufficiently leak tight. lt may also be important to ensure that the sealing does not become compromised, and thus it necessary to regularly check the sealing tightness of the gasket, to be able to detect any leakage. Standard methods for leakage detection are available, for example as described in e.g. ISO 10648-2, EN12237 or EN1886. ln order to properly monitor leak tightness, it is important to provide the equipment with a sealing device allowing this. There is also a need of a sealing arrangement that can be applied to equipment not originally designed for leak tightness monitoring.
Summary According to the present disclosure, there is provided a filter frame configured to hold an air filter media pack and to be installed in a filter mounting structure, the filter frame comprising an outward surface configured to be directed toward a mounting surface of the mounting structure when installed, and a first elongated gasket member is arranged on the outward surface of the filter frame, the first gasket member being configured to allow a protruding rib on the mounting structure to be inserted into the first elongated gasket member so as to form a seal. A second elongated gasket member configured to abut and seal against the mounting structure is arranged on the outward surface of the filter frame and located on a distance from the first elongated gasket member, so as to allow an intermediate gasket space to be formed when the filter frame is mounted in the mounting structure, the intermediate gasket space then being confined by the first and second elongated gasket members, the outward surface ofthe filter frame, and the mounting structure. The present filter frame allow easy installation of an air filter comprising the filter frame in an air filter arrangement, which is advantageous since it is important that the filter can easily be replaced when needed.
The second elongated gasket member may advantageously protrude more from the outward surface of the filter frame than the first elongated gasket member. Further, the first elongated gasket member may be configured to be located in a first recess in the outward surface of the filter frame. The second gasket member may suitably be located in a second recess on the outward surface of the filter frame. The first elongated gasket member is a preferably a gel seal gasket and the second elongated gasket member may suitably be made of elastic polymer material.
The filter frame may advantageously comprise a hollow compartment located beneath the first and second elongated gasket members, which hollow compartment comprises an opening located between the first and second elongated gasket members so as allow fluid connection with the intermediate gasket space. A pressure source connection element configured to be connected to a pressure source may preferably be arranged in the hollow compartment to allow application of pressure on the hollow compartment, and thus on the intermediate gasket space, when the frame is mounted in the mounting structure.
Alternatively or simultaneously, the filter frame may comprise a pressure source connection element in the form of a connection conduit , said connection conduit being configured to be connected to a pressure source to allow application of pressure on the intermediate gasket space. The connection conduit may suitably be arranged through the second elongated gasket member or between the second elongated gasket member and the outward surface of the filter frame.
The pressure source connection element is arranged on an upstream side of the filter frame or on a downstream side of the filter frame.
The present disclosure also relates to a sealing arrangement foran airfilterarrangement, the sealing arrangement comprising a filter frame as described above, and a mounting structure comprised in a filter housing, the mounting structure comprising a mounting surface with a protruding rib. The protruding rib on the mounting structure is configured to be inserted into the first elongated gasket member on the filter frame so as to form a seal, and the second elongated gasket member on the filter frame is configured to abut the mounting surface so as to form a seal when the filter frame is mounted in the mounted structure, thereby forming an intermediate gasket space confined by the first and second elongated gasket members, the filter frame, and the mounting structure.
The sealing arrangement suitably comprises a pressure source adapted to continuously apply a pressure on the intermediate gasket space via a pressure source connection element and a hollow compartment beneath the first and second elongated gasket members having an opening toward the intermediate gasket space, or via connection conduit arranged through the second elongated gasket member, and wherein the pressure source is configured to maintain a set pressure difference towards the surroundings. The sealing arrangement may further comprise a control sensor located between the pressure source and the surroundings, said control sensor being configured to communicate with an evaluation device in order to allow monitoring that the pressure source is operating properly. ln addition, the sealing arrangement may preferably comprise a leakage detecting sensor, preferably an air flow sensor or a pressure sensor, positioned in a conduit between the pressure source and the intermediate gasket space. Further, the sealing arrangement may preferably comprise a backup pressure source arranged parallel to the pressure source mentioned above. The pressure source and the backup pressure source may be an air pump or a pressure tank.
The present disclosure will become apparent from the detailed description given below. The detailed description and specific examples disclose preferred embodiments of the disclosure by way of illustration only. Those skilled in the art understand from guidance in the detailed description that changes and modifications may be made within the scope of the disclosure. 4 Hence, it is to be understood that the herein disclosed disclosure is not limited to the particular component parts of the device described or steps of the methods described since such device and method may vary. lt is also to be understood that the terminology used herein is for purpose of describing particular embodiments only, and is not intended to be limiting.
Brief descriptions of the drawings The present disclosure will be more fully appreciated by reference to the following illustrative and non-limiting detailed description of example embodiments, when taken in conjunction with the accompanying drawings.
Figure 1 is a cross-sectional perspective view of a part of a filter frame of the present disclosure.
Figure 2 is a partially cross-sectional perspective view of a filter frame of the present disclosure.
Figure 3a is a cross-sectional view of a part of a sealing arrangement according to an example embodiment ofthe present disclosure, where the seal is not yet closed.
Figure 3b is a cross-sectional view of a sealing arrangement in Fig. 3a, where the seal is closed, thus forming an intermediate gasket space. Figure 3c is a cross-sectional perspective view ofthe sealing arrangement in Fig. 3b.
Figure 4 is a cross-sectional view of a part of a sealing arrangement according to another example embodiment of the present disclosure.
Figure 5 is a cross-sectional view of a part of a sealing arrangement according to yet another example embodiment of the present disclosure.
Figure 6 shows a the sealing arrangement of Fig. 4, further including of a leakage monitoring arrangement illustrated schematically.
Detailed description The filter frame of the present disclosure configured to hold an air filter media pack and to be installed in a filter mounting structure, the filter frame comprising an outward surface configured to be directed toward a mounting surface ofthe mounting structure when installed, and a first elongated gasket member is arranged on the outward surface of the filter frame, the first gasket member being configured to allow a protruding rib on the mounting structure to be inserted into the first elongated gasket member so as to form a seal. A second elongated gasket member configured to abut and seal against the mounting structure is arranged on the outward surface of the filter frame and located on a distance from the first elongated gasket member, so as to allow an intermediate gasket space to be formed when the filter frame is mounted in the mounting structure, the intermediate gasket space then being confined by the first and second elongated gasket members, the outward surface of the filter frame, and the mounting structure.
The filter frame is configured to be mounted in the mounting structure so as to form a sealing arrangement together with a mounting structure. The sealing arrangement in intended to be used in an air filter arrangement, and comprises a filter frame as described herein, and a mounting structure comprised in a filter housing, which mounting structure comprises a mounting surface with a protruding rib. The protruding rib on the mounting structure is configured to be inserted and partially submerged into the first elongated gasket member on the filter frame so as to form a seal. At least a tip part of the protruding rib will be submerged into the first elongated gasket member when the filter frame is mounted in the mounting structure. The second elongated gasket member on the filter frame is configured to abut the mounting surface so as to form a seal when the filter frame is mounted in the mounted structure, thereby forming an intermediate gasket space confined by the first and second elongated gasket members, the filter frame, and the mounting structure.
The presence of the two elongated gasket members allows improved sealing ofthe gap between the filter frame and the mounting structure to prevent any leakage through the gap, since the two elongated gasket can function as backup for each other. Further, due to the intermediate gasket space formed between the two elongated gasket members when the filter frame is mounted to the mounting structure, a pressure can be applied to said space, allowing monitoring of leak tightness, as described in more detail below. Applying pressure (overpressure or underpressure) on the intermediate gasket space allows for improved prevention of leakage from one side of the gasket (i.e. the pair of elongated gasket members) to the other side of the gasket. Thus, if a leak were to occur between one of the gasket members and the first or second element, the pressure within the intermediate gasket space will prevent any substance from passing through, since the pressure within the intermediate gasket space will force a leaking substance to move in a desired direction by means ofthe applied pressure. 6 Thereby, the interior volume of the enclosure sealed off by the air filter and the sealing arrangement can be kept clean. This may be of particular importance for example within the pharmaceutical industry or within manufacture of electrical components. Similarly, if the enclosure or room accommodates items or activities, which may release unwanted or hazardous substances, such as for example toxic or pathogenic substances, such substances can be prevented from escaping from the enclosure or room.
The two elongated gasket members and the protruding rib on the mounting structure may typically be arranged around the entire periphery of the filter frame to ensure leak tightness. The protruding rib may suitably have a sharp front edge to be easier to insert into the sealing material ofthe first elongated gasket member.
The provision of the two elongated gasket members further allows obtain for improved sealing and leak tightness monitoring also in existing air filter arrangements which are equipped with a protruding element designed to be inserted or submerged into a sealing material, such as for example a sealing gel. The filter first elongated gasket member will then function as a seal in the way originally intended in the air filter arrangement, while the second elongated gasket member provides a backup sealing and further contributes in the forming of the intermediate gasket space between the parts of the sealing arrangement.
The second elongated gasket member may advantageously protrude more from the outward surface of the filter frame than the first elongated gasket member, and may thereby facilitate abutting contact between the gasket surface and the mounting surface of the mounting structure, and no special adaption ofthe mounting surface is necessary.
The first elongated gasket member is preferably configured to be located in a first recess or trough in the outward surface of the filter frame, to facilitate application of the sealing material which may be rather soft. The first elongated gasket member may preferably be a gel seal gasket, for example comprised of silicone or polyurethane gel. The seal material may be poured into said first recess.
Also the second gasket member may suitably be located in a recess (a second recess), preferably a shallow recess, on the outward surface of the filter frame in order to facilitate positioning of the gasket member. Then again, the second gasket member may also be mounted on an outward surface filter fram with no recess. The second elongated gasket member may suitably be made of elastic polymer material, such as polyurethane rubber foamed polyurethane, polyurethane potting, EPDM rubber (ethylene propylene diene monomer 7 rubber), or neoprene. The second gasket member may be attached to the outward surface via its own tackiness or via a self-adhesive layer. A recess simplifies application thereof to the filter frame surface.
Application of pressure on the intermediate gasket space is suitably obtained by connecting the intermediate gasket space to a pressure source. The pressure may be an overpressure or an underpressure, which means that the pressure is applied by the pressure source so as to create positive or negative pressure difference relative to the surroundings, i.e. outside of the intermediate gasket space. The pressure can suitably be applied by the pressure source such that the pressure difference between the intermediate gasket space and the surrounding is 50 Pa-1000 kPa, preferably 1 kPa-500 kPa.
One way of connecting the intermediate gasket space to a pressure source may advantageously be via a hollow compartment comprised in the filter frame and located beneath the first and second elongated gasket members. Fluid connection between the intermediate gasket space and the hollow compartment is obtained by means of one or more opening(s) located between the first and second elongated gasket members. The one or more opening(s) may be a single opening or slot, or a plurality of openings or elongated slots arranged along the periphery of the filter frame.
A connection element configured to be connected to a pressure source can be arranged in the hollow compartment to allow application of pressure on the hollow compartment, and thus in turn on the intermediate gasket space, when the frame is mounted in the mounting structure. By means of the hollow compartment beneath the elongated gasket members, pressure can be applied on the intermediate gasket space without requiring sufficient space for a pressure source connection element between the elongated gasket members. Thereby, the elongated gasket members can be arranged on the outward surface of the filter frame at a very short distance from one another, without preventing application of pressure to the intermediate gasket space. Thereby, gasket arrangement can be made very narrow, so that it requires very little space when installed in the mounting structure. This allows the filter frame to be installed in many different kinds of existing air filter arrangements, which are previously equipped only with a single gel type seal.
The connection element configured to be connected to the pressure source can be arranged in a connection aperture in the frame, thus providing fluid contact between the hollow compartment and the pressure source. The connection element may include an attachment 8 portion sealingly attached to the connection aperture in the frame and a tube portion connecting the attachment portion to the pressure source.
Alternatively or simultaneously, connection between the intermediate gasket space and the pressure source may be obtained via a connection element comprising a connection conduit, which is arranged through the second elongated gasket member and is configured to be connected to the pressure source. The connection conduit may include a hollow tube end preferably having a diameter substantially smaller than the diameter of the second elongated gasket member to maintain the sealing properties of the second elongated gasket member. lf desired, the connection conduit may alternatively be arranged through the frame and inserted through the opening between the two elongated gasket members. A connection conduit arranged through the second elongated gasket member may be suitable alternative for a filter frame which does not include a hollow compartment, or if there isn't sufficient space in the air filter arrangement to accommodate a connection element attached to a hollow compartment ofthe filter frame. Alternatively, the connection conduit can be arra nged between the second elongated gasket member and the outward surface of the filter frame. This may be suitable if there is no recess for the second elongated gasket member, so that it is placed on a substantially flat outward surface of the filter frame. The connection conduit may then be placed under the second elongated gasket member, for example on the (flat) outward surface or in a groove in the outward surface.
The filter frame may comprise some or all ofthe above mentioned connection elements at the same time, and the connections may all be plugged upon delivery, such that appropriate connection to a pressure source can selected during installation in an air filter arrangement.
The pressure source connection element is arranged on an upstream side of the filter frame or on a downstream side of the filter frame.
The sealing arrangement comprising the filterframe and the mounting structure suitably comprises a pressure source adapted to continuously apply a pressure on the intermediate gasket space via a pressure source connection element and a hollow compartment beneath the first and second elongated gasket members having an opening toward the intermediate gasket space, or via a connection conduit arranged through the second elongated gasket member, and the pressure source is configured to maintain a set pressure difference towards the surroundings. A control sensor configured to communicate with an evaluation device in order to allow monitoring that the pressure source is operating properly can be located between the pressure source and the surroundings. A leakage detecting sensor may also be included in the 9 sealing arrangement. The leakage detecting sensor may preferably be an air flow sensor or a pressure sensor, for example a thermal airflow sensor, pressure drop measurement device for measurement over capillaries or orifices, rotating vane, vortex meter, or ultrasonic flow meter, and is suitably positioned in a conduit between the pressure source and the intermediate gasket space. Further, the sealing arrangement may preferably comprise a backup pressure source arranged parallel to the pressure source mentioned above, to ensure that pressure can be applied to the intermediate gasket space at all times. The pressure source and the backup pressure source may be an air pump, a pressure tank, or a centralized compressed air system.
Leak tightness can be monitored by methods for example according to the standards ISO 10648-2, EN12237 or EN1886. These methods generally include applying a pressure to the interior volume ofthe sealed enclosure or room to be leak tested, stabilising the pressure and monitoring any changes in the pressure on the volume during a test time period. The leakage detecting sensor is configured to be able to detect a pressure change within the intermediate gasket space, which is indicative of leakage. When the pressure source is connected to the intermediate gasket space to continuously apply pressure thereon, leakage detection can be available at all times, and can be applied also while the sealed enclosure or room to be tested is in use or operation. Thus, leakage detection can be applied on the actual equipment to be used, including the seal of the gap during service. No substitute parts, such as blanking plates or the like, need to be used. The leakage sensor is suitably selected in accordance with the leak tightness requirement set for the sealed enclosure or room, to be able to detect unacceptable leaks. The leakage detecting sensor can be an air flow sensor or a pressure sensor, for example a thermal airflow sensor, pressure drop measurement device for measurement over capillaries or orifices, rotating vane, vortex meter, or ultrasonic flow meter.
Example embodiments The present disclosure will now be described with reference to the accompanying drawings as listed above, in which preferred example embodiments of the disclosure are shown. The disclosure may, however, be embodied in other forms and should not be construed as limited to the herein disclosed embodiments. The disclosed embodiments are provided to fully convey the scope of the disclosure to the skilled person.
Figs. 1 and 2 illustrates a filter frame 1 configured to hold an air filter media pack 2. Figs. 3a-3c illustrate an example of a sealing arrangement comprising a filter frame and a mounting structure, in which a pressure source connection element is arranged on an upstream side of the filter frame. Fig. 4 illustrates another example of a sealing arrangement comprising a filter frame and a mounting structure, in which a pressure source connection element is arranged on an downstream side of the filter frame. Fig. 5 illustrates an example of a sealing arrangement comprising a filter frame and a mounting structure, in which a pressure source connection conduit is arranged through a second gasket member on an upstream side of the filter frame.
The filter frame 1 is configured to be installed in a filter mounting structure 20 to form a sealing arrangement, as shown in Figs. 3a-c, 4 and 5. The filter frame comprises an outward surface 4 configured to be directed toward a mounting surface 21 ofthe mounting structure 20 when installed. A first elongated gasket member 5 is arranged on the outward surface 4 of the filter frame. The first gasket member is configured to allow a protruding rib 22 on the mounting structure to be inserted into the first elongated gasket member 5 so as to form a seal. A second elongated gasket member 6 configured to abut and seal against the mounting structure is arranged on the outward surface of the filter frame and located on a distance from the first elongated gasket member 5. Thereby, an intermediate gasket space 7 confined by the first and second elongated gasket members 5, 6, the outward surface 4 of the filter frame 1, and the mounting structure 20. Fig. 3a shows the sealing arrangement in a not yet closed position, and Fig. 3b shows how the intermediate gasket space 7 is formed in a closed position. ln this example, the second elongated gasket member 6 protrudes more from the outward surface 4 of the filter frame than the first elongated gasket member 5, and the first elongated gasket member 5 is located in a first recess 9 in the outward surface of the filter frame. The second gasket member 6 is located in a second recess 10 on the outward surface of the filter frame. ln the illustrated examples, the filterframe comprises a hollow compartment 11 located beneath the first and second elongated gasket members 5,6. The hollow compartment comprises an opening 12 located between the first and second elongated gasket members 5,6 so as allow fluid connection with the intermediate gasket space 7. ln the examples shown in Figs. 3a-c and 4, a pressure source connection element 13',13" configured to be connected to a pressure source is arranged in the hollow compartment 11 to allow application of pressure on the hollow compartment 11. ln the example of Fig. 5, the filter frame comprises a pressure source connection element in the form of a connection conduit 23 arranged through the second elongated gasket member 6, said connection conduit 23 being configured to be connected to a pressure source to allow 11 application of pressure on the intermediate gasket space 7. As an alternative (not shown), the connection conduit may be arranged between the second elongated gasket member and the outward surface of the filter frame.
The pressure source connection element 13',13",23 can be arranged on an upstream side 14 of the filter frame (Figs. 3a-c and 5) or on a downstream side 15 of the filter frame (Fig. 4). ln the example illustrated schematically in Fig. 6, the sealing arrangement further comprises a pressure source 25 which is adapted to continuously apply a pressure on the intermediate gasket space 7 via a pressure source connection element 13',13" and a hollow compartment 11 beneath the first and second elongated gasket members 5,6 having an opening 12 toward the intermediate gasket space 7. The pressure source is configured to maintain a set pressure difference towards the surroundings. Alternatively (not shown), the pressure can be applied via the connection conduit 23 arranged through the second elongated gasket member 6. The sealing arrangement further comprises a control sensor 31 located between the pressure source 25 and the surroundings. The control sensor 31 is configured to communicate with an evaluation device 32 in order to allow monitoring that the pressure source 25 is operating properly. The sealing arrangement also comprises a leakage monitoring device the sealing comprises a leakage detecting sensor 33, preferably an air flow sensor or a pressure sensor, positioned in the conduit between the pressure source 25 and the intermediate gasket space 7, the sealing arrangement further preferably comprising a backup pressure source 26 arranged parallel to the pressure source 25.
The person skilled in the art realizes that the present disclosure is not limited to the preferred example embodiments described above. The person skilled in the art further realizes that modifications and variations are possible within the scope of the appended claims. Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed disclosure, from a study ofthe drawings, the disclosure, and the appended claims.
Claims (14)
1. A filter frame (1) configured to hold an air filter media pack (2) and to be installed in a filter mounting structure (20), said filter frame comprising an outward surface (4) configured to be directed toward a mounting surface (21) ofthe mounting structure (20) when installed, and a first elongated gasket member (5) is arranged on the outward surface (4) of the filter frame, said first gasket member being configured to allow a protruding rib (22) on the mounting structure to be inserted into the first elongated gasket member (5) so as to form a seal, and wherein a second elongated gasket member (6) configured to abut and seal against the mounting structure is arranged on the outward surface of the filter frame and located on a distance from the first elongated gasket member (5), so as to allow an intermediate gasket space (7) to be formed when the filter frame is mounted in the mounting structure, said intermediate gasket space (7) then being confined by the first and second elongated gasket members (5,6), the outward surface (4) of the filter frame (1), and the mounting structure (20).
2. The filter frame of claim 1, wherein the second elongated gasket member (6) protrudes more from the outward surface (4) of the filter frame than the first elongated gasket member (5).
3. The filter frame of claim 1 or 2, wherein the first elongated gasket member (5) is configured to be located in a first recess (9) in the outward surface of the filter frame.
4. The filter frame of any one of claims 1-3, wherein the second gasket member (6) is located in a second recess (10) on the outward surface ofthe filter frame.
5. The filter frame of any one of claims 1-4, wherein the first gasket member (5) is a gel seal gasket.
6. The filter frame of any one of claims 1-5, wherein the second gasket member (6) is made of elastic polymer material.
7. The filter frame of any one of claims 1-6, further comprising a hollow compartment (11) located beneath the first and second elongated gasket members (5,6), which hollow com pa rtment comprises an opening (12) located between the first and second elongated gasket members (5,6) so as allow fluid connection with the intermediate gasket space (7), and wherein a pressure source connection element (13',13") configured to be connected to a pressuresource is arranged in the hollow compartment (11) to allow application of pressure on the hollow compartment (11).
8. The filter frame of any one of claims 1-7, further comprising a pressure source connection element in the form ofa connection conduit (23) , said connection conduit (23) being configured to be connected to a pressure source to allow application of pressure on the intermediate gasket space (7), wherein the connection conduit (23) is arranged through the second elongated gasket member (6) or between the second elongated gasket member (6) and the outward surface (4) of the filter frame.
9. The filter frame of claim 7 or 8, wherein the pressure source connection element (13',13",23) is arranged on an upstream side (14) of the filter frame or on a downstream side (15) ofthe filter frame.
10. A sealing arrangement (1) for an air filter arrangement (20), said sealing arrangement comprising a filter frame (1) according to any one of claims 1-9, and a mounting structure (20) comprised in a filter housing, said mounting structure comprising a mounting surface (21) with a protruding rib (22), wherein the protruding rib (22) on the mounting structure is configured to be inserted into the first elongated gasket member (5) on the filter frame so as to form a seal, and the second elongated gasket member (6) on the filter frame is configured to abut the mounting surface (21) so as to form a seal, when the filter frame is mounted in the mounted structure so as to form an intermediate gasket space (7) confined by the first and second elongated gasket members (5,6), the filter frame (1) and the mounting structure (20).
11. The sealing arrangement of claim 10, wherein the sealing arrangement further comprises a pressure source (25) adapted to continuously apply a pressure on the intermediate gasket space (7) via a pressure source connection element (13',13") and a hollow compartment (11) beneath the first and second elongated gasket members (5,6) having an opening (12) toward the intermediate gasket space (7), or via connection conduit (23) arranged through the second elongated gasket member (6), and wherein the pressure source is configured to maintain a set pressure difference towards the surroundings.
12. The sealing arrangement of claim 11, further comprising a control sensor (31) located between the pressure source (25) and the surroundings, said control sensor (31) beingconfigured to communicate with an evaluation device (32) in order to allow monitoring that the pressure source is operating properly.
13. The sealing arrangement of claim 12, further comprising a leakage detecting sensor (33), preferably an air flow sensor or a pressure sensor, positioned in the conduit between the pressure source (25) and the intermediate gasket space (7), the sealing arrangement further preferably comprising a backup pressure source (26) arranged parallel to the pressure source (25).
14. The sealing arrangement of any one of claims 11-13, wherein the pressure source (25) and the backup pressure source (26) is an air pump or a pressure tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2251476A SE2251476A1 (en) | 2022-12-16 | 2022-12-16 | A filter frame for an air filter and a sealing arrangement for an air filter arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2251476A SE2251476A1 (en) | 2022-12-16 | 2022-12-16 | A filter frame for an air filter and a sealing arrangement for an air filter arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE2251476A1 true SE2251476A1 (en) | 2024-06-17 |
Family
ID=91852430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE2251476A SE2251476A1 (en) | 2022-12-16 | 2022-12-16 | A filter frame for an air filter and a sealing arrangement for an air filter arrangement |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE2251476A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050268585A1 (en) * | 2004-06-08 | 2005-12-08 | Morse Thomas C | Filter housing assembly |
| EP3396269A1 (en) * | 2017-04-24 | 2018-10-31 | Blueair AB | Air filter unit |
| US20200032905A1 (en) * | 2018-07-24 | 2020-01-30 | Carl Freudenberg Kg | Filter arrangement with a gel seal and use of such a filter arrangement as an interior air filter |
| WO2021112753A1 (en) * | 2019-12-04 | 2021-06-10 | Camfil Ab | Sealing arrangement, filter and filter housing, method of monitoring leak tightness, and leak tightness monitoring system |
-
2022
- 2022-12-16 SE SE2251476A patent/SE2251476A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050268585A1 (en) * | 2004-06-08 | 2005-12-08 | Morse Thomas C | Filter housing assembly |
| EP3396269A1 (en) * | 2017-04-24 | 2018-10-31 | Blueair AB | Air filter unit |
| US20200032905A1 (en) * | 2018-07-24 | 2020-01-30 | Carl Freudenberg Kg | Filter arrangement with a gel seal and use of such a filter arrangement as an interior air filter |
| WO2021112753A1 (en) * | 2019-12-04 | 2021-06-10 | Camfil Ab | Sealing arrangement, filter and filter housing, method of monitoring leak tightness, and leak tightness monitoring system |
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