WO2016032933A1 - Adjustable air filter - Google Patents

Adjustable air filter Download PDF

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Publication number
WO2016032933A1
WO2016032933A1 PCT/US2015/046488 US2015046488W WO2016032933A1 WO 2016032933 A1 WO2016032933 A1 WO 2016032933A1 US 2015046488 W US2015046488 W US 2015046488W WO 2016032933 A1 WO2016032933 A1 WO 2016032933A1
Authority
WO
WIPO (PCT)
Prior art keywords
air filter
filter assembly
window
assembly
window air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2015/046488
Other languages
English (en)
French (fr)
Inventor
Andrew R. Fox
Weilai JIANG
Bryan L. GERHARDT
Nicolas A. Echeverri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to CN201580045913.8A priority Critical patent/CN106604768A/zh
Priority to US15/503,945 priority patent/US20170241192A1/en
Priority to JP2017511315A priority patent/JP2017528310A/ja
Publication of WO2016032933A1 publication Critical patent/WO2016032933A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • 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
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4227—Manipulating filters or filter elements, e.g. handles or extracting tools
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/442—Auxiliary equipment or operation thereof controlling filtration by measuring the concentration of particles
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/448—Auxiliary equipment or operation thereof controlling filtration by temperature measuring
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
    • 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
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/03—Ventilating devices for inserting under upwardly-sliding windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/18—Air-flow control members, e.g. louvres, grilles, flaps or guide plates specially adapted for insertion in flat panels, e.g. in door or window-pane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/158—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using active carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/04—Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/203—Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/35—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for venting arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/40—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning of environmental air, e.g. by filters installed on vehicles or on streets
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B2007/023—Air flow induced by fan
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/20—Details or features not otherwise provided for mounted in or close to a window
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • F24F8/194—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages by filtering using high voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/95—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes
    • F24F8/99—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes for treating air sourced from urban areas, e.g. from streets

Definitions

  • the present disclosure relates to air filters. More particularly, it relates to adjustably sized air filter systems useable in a window opening.
  • Windows are available in a large variety of sizes and can include vertically or horizontally operable sashes to provide air flow between an exterior and an interior of a building structure. Occupants of a building structure often desire opening windows to let fresh air into an interior of a home, business, or otherwise enclosed space. However, in many locations, such as highly populated areas of China, the outside air is more contaminated than the indoor air. Novel filtering solutions are needed to let the fresh aspects of the outdoor air in without letting in the pollution or contaminants. Outdoor contaminants may include larger particles such as pollen, dust, and mold spores and smaller particles such as those forming PM2.5, bacteria, and viruses. Gaseous outdoor pollutants such as odors, NO x , SO2, ozone, and others may also be of concern in some locations. Summary
  • the inventors of the present disclosure realized that a need exists for a window filter that protects users from outside air quality contaminants, allows fresh air get into the home through windows, can be easily installed and used by consumers, is versatile to fit most window sizes, and has minimal impact on lighting and visibility.
  • the inventors of the present disclosure invented and discovered apparatuses and methods that address at least some of these goals.
  • Some embodiments of the present disclosure relate to a window air filter assembly, comprising: first and second u-shaped frame members that can be coupled to form an adjustable frame assembly; and a filter media assembly that is attachable to the frame assembly and that includes an adjustable length filter media; wherein the window filter assembly is expandable from a collapsed state to an expanded state.
  • the first and second u-shaped frame members are telescopically coupled.
  • first and second u-shaped frame members are in a spring- loaded engagement with one another.
  • the first and second u-shaped frame members include at least one of a detent, notch, or other mechanism to selectively lock the adjustable window air filter assembly in a desired length or orientation. In some embodiments, the first and second u-shaped frame members are frictionally secured to one another.
  • the first and second u-shaped frame members are identical but asymmetric.
  • the frame assembly is made of at least one of plastic, metal, paper, wood, and/or cardboard.
  • Some embodiments further include an adjustable element that assists in retaining the adjustable air filter within a window.
  • the adjustable element is at least one of a spring-loaded end member, rubber materials, or a gripping structure.
  • the filter media is held in place in or on the frame assembly by at least one of open tubes, pockets, partial loops, adhesive strips, hook and loop connection means, and/or a loop- engaging fastener material.
  • Some embodiments further include a spring-loaded engagement with one another to provide continuous dimensional adjustability.
  • the filter media is at least one of an extended surface area media, pleated, corrugated, and/or a high surface area media.
  • the filter media is self-supporting.
  • the filter media has an electrostatic charge.
  • the filter media includes at least one of porous foam, a nonwoven, paper, and/or fiberglass.
  • the filter media is wire -backed.
  • the window filter assembly can self-retain the shape of the selected expanded and/or collapsed state.
  • the window filter assembly can be adjusted to fit windows of various sizes.
  • the window filter assembly has a size that can be adjusted to fit in a partially open window.
  • the air filter media is replaceable and/or removable.
  • the air filter media can be replaced by at least one of (a) through an open length along one side of the first or second u-shaped frame members; (b) by insertion from one of the major faces of the adjustable air filter; and /or (c) through one of the major ends.
  • the filter media is pleated.
  • the filter media has an elastic or elongating structure.
  • the filter media includes at least one of elastic filaments, extruded elastic filaments, and/or elastic netting.
  • the assembly further includes elongated pleat tip supports.
  • the filter media is corrugated.
  • the assembly further includes a restraining strap or component.
  • FIG. 1 is a side view of an exemplary adjustable air filter in accordance with principles of the present disclosure
  • FIG. 2A is a side view of an exemplary filter frame useful with the adjustable air filter of FIG. 1 in accordance with principles of the present disclosure and partially unassembled;
  • FIG. 2B is a side view of the filter frame of FIG.2A in an assembled state
  • FIG. 2C is a side view of an exemplary filter frame useful with an adjustable air filter in accordance with principles of the present disclosure including a spring loaded end frame;
  • FIGS. 3A-3D are cross-sectional views of exemplary adjustable air filters in accordance with principles of the present disclosure.
  • FIG. 4A is a perspective view an exemplary pleated filter media assembly useful with adjustable air filters of the present disclosure and in an expanded condition;
  • FIG. 4B is a cross-sectional view of the pleated filter media assembly of FIG. 4A, taken along the line 4B-4B;
  • FIG. 4C is a side view of a portion of the pleated filter media assembly of FIG. 4A in a collapsed condition
  • FIGS. 5A-5C are cross-sectional views of filter media as useful with the adjustable air filters of the present disclosure.
  • FIGS. 6A-6B are perspective views of an adjustable air filter for use in a vertically opening window in accordance with principles of the present disclosure.
  • FIGS. 7A-7B are perspective views of an adjustable air filter installed in a horizontally opening window in accordance with principles of the present disclosure.
  • FIG. 1 One embodiment of an adjustable window air filter assembly 20, in accordance with principles of the present disclosure, is shown in FIG. 1.
  • the adjustable air filter 20 is generally configured to be expandable and, optionally, retractable and to self-retain in a desired state for installation and use in a window opening.
  • the adjustable air filter 20 includes a filter media assembly 30 and a frame assembly 40.
  • the filter media assembly 30 includes an adjustable length filter media 32.
  • the frame assembly 40 includes opposing first and second frame members 42, 44. Details on the various components are provided below.
  • the adjustable air filter 20 does not require a fully rigid frame permanently surrounding the filter media assembly 30 and can be adjusted to fit window openings of various sizes.
  • the adjustable air filter 20 has an adjustable length along a major, or longitudinal, axis.
  • the adjustable air filter 20 is intended to require a simple length adjustment by a user to set the major dimension of the frame assembly 40.
  • the frame assembly 40 can include the at least two frame members 42, 44 to provide expansion and contraction of along the major axis.
  • the frame members 42, 44 are identical but asymmetric.
  • the frame assembly 40 when assembled, contains the filter media assembly 30.
  • the filter media assembly 30 is adjustable to correspond to the adjusted length of the frame assembly 40 as discussed in more detail below.
  • the adjustable air filter 20 is configured to be readily adjustable along the longitudinal axis and contracted or expanded by directing the frame members 42, 44 toward or away from each other.
  • FIG. 1 illustrates one embodiment of a telescopic engagement of the two frame members 42, 44.
  • Various interlocking geometries may be used to secure the telescoping frame members 42, 44 to one another.
  • the frame assembly 40 and the filter media assembly 30 can be secured in the selected state.
  • the frame members 42, 44 include a detent, notch, or other mechanism to selectively lock the adjustable air filter 20 in a preferred or desired length or orientation once set (not shown).
  • the frame members 42, 44 are frictionally secured at the preferred length.
  • the frame members 42, 44 are generally U-shaped in profile and each includes a first section 50(a, b), a second section 52(a, b), and a third section 54(a, b) extending between the first section 50(a, b) and the second section 52(a, b), respectively.
  • the first and second sections 50, 52 extend parallel to one another and the third section 54 is perpendicular to both the first and second sections 50, 52.
  • the first section 50 has a length greater than the second section 52.
  • Asymmetric features may be used to allow easier motion in the longitudinal direction of travel.
  • the frame members 40, 42 are constructed of a rigid and lightweight material such as plastic, metal, paper, wood, and/or cardboard for example.
  • the first section 50a of the first frame member 42 is diametrically opposed to the first section 50b of the second frame member 44.
  • the first section 50 terminates in a first end portion 56 opposite the third section 54 and the second section 52 terminates in a second end portion 58 opposite the third section 54.
  • the end portions 56, 58 can be slidably matable and end portions 56, 58 at least partially overlapping.
  • either the first or second end portion 56, 58 is larger in at least one direction (i.e. , has a larger cross- section) than the other.
  • the end portions 56, 58 are frictionally fit together.
  • the entire length of the first sections 50a, 50b have a larger cross-sectional width than the second sections 52a, 52b.
  • an adjustable element 60 can be included on one or more of the third section 54 of the frame members 42, 44.
  • the adjustable element 60 can be a spring-loaded end member, for example.
  • the spring-loaded end member 60 can be included to allow easier installation of the adjustable air filter 20, for example, if the frame members 42, 44 are locked in position after initial sizing to the user's window.
  • the adjustable element 60 may be employed, particularly of the entire frame 40 is not spring-loaded.
  • An adjustable element 60 can improve installation and removal of the product by providing a small amount of adjustability (e.g. 2-50 mm of travel) on the adjustable air filter 20 that is intended to fit snugly into a window opening. Additionally, the adjustable element 60 can assist in retaining the adjustable air filter 20 within the open window cavity.
  • the spring-loaded end member 60 can be included on one or both ends to provide an outward pushing force to hold the adjustable air filter 20 into the window frame during use.
  • the adjustable element 60 can also provide the benefit of a continuous outward pushing force that would help hold the filter in place during use.
  • the adjustable element 60 can include rubber materials, a micro-replicated gripping surface, or other structures.
  • the adjustable air filter can also otherwise employ rubber materials or other gripping structures to improve the frictional fit in the window opening.
  • FIGS. 3A-3D illustrate cross-sectional views of adjustable air filters according to embodiments of the present disclosure.
  • the frame members 142, 144, 242, 244 can be U-shaped channels in cross-section.
  • the filter media assembly 30 is captured on an interior of the U-shaped channel of the frame members 142, 144, 242, 244.
  • Other shapes suitable to capture edges 34 of the pleated filter media assembly 30 are also acceptable, for example, C-shaped channels or channels which can "pinch" onto a filter media.
  • the air filter media is held in the frame assembly by at least one of at least one of open tubes, pockets, partial loops, adhesive strips, hook and loop connection means, and/or a loop-engaging fastener material.
  • the filter frame 240 is spring-loaded for both adjustability and ease of installation and removal.
  • FIGS. 3C-3D illustrate cross-sectional embodiments of a spring 62 included for spring-loading of the filter frame 240.
  • the spring 62 may be separated from the filter 30 by a wall 64 extending along a length of frame members 242, 244.
  • the spring 62 does not travel the entire length of the filter frame 240 and the first and second sections 250, 252 are in a spring- loaded engagement with one another to provide continuous dimensional adjustability and a continuous outward force once installed in the window.
  • the pleated filter media assembly 30 is optionally replaceable.
  • the filter media assembly 30 may be refilled by having one or more frame members 40, 42 including a hinge or other mechanism (not shown) for opening to allow removal of the spent filter media assembly 30 and insertion of a new filter media assembly 30.
  • Any or some of the frame sections 50, 52, 54 can include hinged connections (not shown) to allow for simple filter media assembly 30 replacement.
  • the filter media assembly 30 is replaceable through an open length along one side of the third section 54, for example.
  • the replaceable filter media assembly 30 may be inserted from one of the major faces of the adjustable air filter 20, and may or may not require moveable components on the frame members 42, 44; for example, insertion and replacement of the filter media assembly can be achieved by a front or back face-loading replacement of filter media assembly 30.
  • FIGS. 4A through 4C One embodiment of a filter media assembly 30 is shown in FIGS. 4A through 4C.
  • the filter media 32 of the filter media assembly 30 is pleated and includes a plurality of pleats 70 each including a fold line 72 defining a pleat tip 74 and a pair of adjacent panels 76.
  • the term "pleated" refers to filter media at least a portion of which has been folded to form a configuration comprising rows of generally parallel, oppositely oriented folds. Each fold is referred to as a pleat.
  • Pleats can be formed in the filter media 32 (or in the pleated filter media assembly 30) using various methods and components as are well known in the art (e.g., those described in U.S. Patent No.
  • the pleated filter media assembly 30 can have any desired shape, including, for example, the quadrilateral or rectangular shape (the term "rectangular" being specifically inclusive of a square shape) shown, defining opposing sides 34a, 34b and opposing ends 35a, 35b.
  • the pleated filter media assemblies can consist of the filter media or web 32 alone or can include one or more additional components or structures applied or assembled to the filter media 32 so long as the resultant filter media assembly 30 can at least be transitioned from the collapsed condition to the expanded condition without damaging a structural integrity of the filter media assembly 30, and optionally can be repeatedly transitioned between the collapsed and expanded conditions without damaging a structural integrity of the filter media assembly 30.
  • the filter media 32 of the assembly 30 can be self-supporting or non-self-supporting.
  • self-supporting filter media or web can describe at least one of the following conditions: (1) a filter media or web that is deformation resistant without requiring stiffening layers, adhesive or other reinforcement in the filter media web; or (2) the filter media generally maintains its shape when subj ected to an airstream as described, for example, in U. S. Patent No. 7, 169,202 to Kubokawa, the entire teachings of which are incorporated herein by reference; or (3) a web or media having sufficient coherency and strength so as to be drapable and handleable without substantial tearing or rupture.
  • non-self-supporting can denote an air filter media that is not capable, in the absence of a support frame and/or a support grill, of withstanding the forces encountered due to typical air flow.
  • the filter media or web 32 can be self-supporting or non-self-supporting.
  • the pleated filter media assembly 30 consists of the pleated filter media or web 32 and a support structure
  • the pleated filter media 32 can be non-self-supporting with the addition supporting structure rendering the pleated filter media assembly 30, as a whole, to be self-supporting.
  • the filter media 32 can be wire- backed.
  • FIGS. 5A-5C illustrate various examples of pleated filter media that can be employed with the adjustable air filter 20.
  • the pleated filter media are expandable in at least one direction corresponding to the major axis.
  • FIG. 5 A illustrates a coarse pleated filter assembly 130 useful in the adjustable air filter 20.
  • the coarse pleated filter assembly 130 contains filter media 132 continuously bonded to an expanded metal mesh 136 and then co-pleated, has adjustability controlled by the bending properties of the expanded metal mesh 136 and the length provided by the pleated structure.
  • FIG. 5B illustrates a filter media assembly 230 having a mini-pleat filter media 232 construction that can be dimensionally adjustable by having an elastic structure 236, such as elastic filaments (e.g.
  • FIG. 5C illustrates a filter media assembly 330 having a corrugated filter media 332 construction, as described in U.S. Patent Application No. 13/968,609, filed August 16, 2013, entitled "Nestable Framed Pleated Air Filter and Method of Making" and U.S. Patent Application No.
  • the particular filter media 132, 232, 332 selected for the filter media assemblies 130, 230, 330 can be any desired filter media. Some exemplary filter media may be particularly suited to have particular desired characteristics.
  • the filter media assembly 30 (and, accordingly, filter media assemblies 130, 230, 330) is constructed from moisture-resistant materials.
  • the filter media may optionally include additional layers or features to specifically block or repel water, such as rain.
  • an electrostatic charge is optionally imparted into or on to material(s) of the filter media 32.
  • An electrostatically charged media 32 may be used, of which many grades are available, and many of which offer high efficiency with low pressure drop.
  • the filter media 32 can be an electret nonwoven web.
  • Electric charge can be imparted to the filter media 32 in a variety of ways as is well known in the art, for example by hydrocharging, corona charging, etc. (e.g., as described in U.S. Patent No. 7,947, 142 (mentioned above)).
  • the filter media 32 is not electrostatically charged. Additional multi-functional media grades, which incorporate activated carbon or other materials for purifying gas-phase pollutants, may also be incorporated into the filter structure.
  • the filter media 32 can be constructed, for example, from nonwoven fibrous media formed of thermoplastics or thermosetting materials such as polypropylene, linear polyethylene and polyvinyl chloride.
  • the filter media 32 comprises a filter media that attracts and captures dust, allergens such as pollen and mold spores, and fine particle pollution from the outdoor air.
  • nonwoven webs useful with the filter media 32 can be a high loft spunbond web, such as described, for example, in U.S. Patent No. 8,162,153 to Fox et al., the entire teachings of which are incorporated herein by reference.
  • the filter media 32 can be a low loft spunbond web, such as those described in U.S. Patent No. 7,947, 142 to Fox et al., the entire teachings of which are incorporated herein by reference.
  • nonwoven webs useful with the filter media 32 are generated by other techniques and/or have other characteristics, such as the meltblown nonwoven webs disclosed in U.S. Patent No. 6,858,297 to Shah et al. (mentioned above).
  • Other non-limiting example of useful nonwoven web formats include bi-modal fiber diameter meltblown media such as that described in U.S. Patent No. 7,858,163, the entire teaching of which are incorporated herein by reference.
  • the present adjustable air filters 20 are useful in protecting users from outside air quality contaminants.
  • An electrostatically charged media 32 may be used, of which many grades are available, and many of which offer high efficiency with low pressure drop. Additional multi-functional media grades, which incorporate activated carbon or other materials for purifying gas-phase pollutants, may also be incorporated into the filter media assembly 30.
  • a pleated structure can provide a significantly lower airflow resistance than a flat sheet for the same filter perimeter dimensions and allow fresh air get into the home or building structure through at least partially open windows.
  • the filter media assemblies 130, 230, 330 are akin to filter media assembly 30 and are such that the filter media assemblies 130, 230, 330 can, in some embodiments, be repeatedly transitioned between an expanded condition as in FIG. 4B and a collapsed condition as in FIG. 4C, with a spacing distance between successive pleat tips 74 in the expanded condition being greater than that of the collapsed condition.
  • the "expanded condition" of the pleated filter media assembly 30 as an individual component generally corresponds with the "expanded state" of the window air filter 120, 220 (e.g., FIGS.
  • the window air filter 120, 220 includes additional components (described above) that retain the pleated filter media assembly 30 in the particular size and shape of the expanded state.
  • the pleated filter media assembly 30 can be transitioned (e.g., stretched or compacted) to any of a number of different "expanded conditions" and "collapsed conditions".
  • the window air filter 120, 220 as a whole, can self-retain the shape of the selected expanded state and collapsed state.
  • FIGS. 6A-6B illustrate an adjustable air filter 120 installed in vertically sliding- type windows 180 either single or double hung.
  • FIGS. 7A-7B illustrate an adjustable air filter 280 installed in a horizontally sliding-type window. These sliding window types appear to be the predominant types in both North
  • the dimensional adjustability in the major dimension of the adjustable air filter 120, 220 provides adjustability to fit a variety of window 180, 280 widths (the cross-direction of window travel).
  • the frame assembly 140, 240 can be captured on one side by the window sash and by three sides by the window frame.
  • the adjustable air filter 120, 220 is expanded to the cross-direction dimension of the window, and the window is partially closed on the filter to provide adjustability in the window-motion direction.
  • a small gap may be created between the two window segments, allowing air to flow from the outside between the two window segments and bypassing the filter 120, 220 to gain entry to the indoors. This bypass may be avoided by the use of a piece of foam, weather-stripping, etc. (not shown).
  • the adjustable air filter 120, 220 can be employed in a partially open window, where only 10- 30% of the window area is blocked, for example, leaving a large percentage of the window area still open for light passage and visibility.
  • the adjustable air filter 20 further has a restraining strap or component to prevent it from falling out the window (not shown).
  • the length of the adjustable air filter 120, 220 is adjustable to fit a variety of window sizes, and the filter frame 140, 240 optionally has a locking mechanism to fix the size once expanded to fit the window.
  • the air filter assembly of the present disclosure can be used in a powered air filtration system such as, for example, that described in U.S. Patent Application No. 62/041501, incorporated herein in its entirety.
  • the air filter media can come in roll form, such as, for example, that described in US Patent Application No. 62/041500, the entirety of which is incorporated herein.
  • the air filter media or assembly can include expandable elements as is described in U.S. Patent Application No. 62/206,928, incorporated herein in its entirety.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electrostatic Separation (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Ventilation (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
PCT/US2015/046488 2014-08-25 2015-08-24 Adjustable air filter Ceased WO2016032933A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201580045913.8A CN106604768A (zh) 2014-08-25 2015-08-24 可调节的空气过滤器
US15/503,945 US20170241192A1 (en) 2014-08-25 2015-08-24 Adjustable air filter
JP2017511315A JP2017528310A (ja) 2014-08-25 2015-08-24 調節可能エアフィルタ

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US201462041499P 2014-08-25 2014-08-25
US201462041500P 2014-08-25 2014-08-25
US201462041501P 2014-08-25 2014-08-25
US201462041496P 2014-08-25 2014-08-25
US62/041,496 2014-08-25
US62/041,501 2014-08-25
US62/041,500 2014-08-25
US62/041,499 2014-08-25
US201562206928P 2015-08-19 2015-08-19
US62/206,928 2015-08-19

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WO2016032933A1 true WO2016032933A1 (en) 2016-03-03

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PCT/US2015/046488 Ceased WO2016032933A1 (en) 2014-08-25 2015-08-24 Adjustable air filter
PCT/US2015/046483 Ceased WO2016032930A1 (en) 2014-08-25 2015-08-24 Window air filter
PCT/US2015/046497 Ceased WO2016032938A2 (en) 2014-08-25 2015-08-24 A uniformly expandable air filter
PCT/US2015/046494 Ceased WO2016032937A1 (en) 2014-08-25 2015-08-24 Powered window air filter
PCT/US2015/046490 Ceased WO2016032935A1 (en) 2014-08-25 2015-08-24 Air filter configured in a roll

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Application Number Title Priority Date Filing Date
PCT/US2015/046483 Ceased WO2016032930A1 (en) 2014-08-25 2015-08-24 Window air filter
PCT/US2015/046497 Ceased WO2016032938A2 (en) 2014-08-25 2015-08-24 A uniformly expandable air filter
PCT/US2015/046494 Ceased WO2016032937A1 (en) 2014-08-25 2015-08-24 Powered window air filter
PCT/US2015/046490 Ceased WO2016032935A1 (en) 2014-08-25 2015-08-24 Air filter configured in a roll

Country Status (5)

Country Link
US (6) US11192059B2 (enExample)
JP (5) JP2017528311A (enExample)
CN (5) CN106794412B (enExample)
TW (5) TW201628698A (enExample)
WO (5) WO2016032933A1 (enExample)

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US20170241192A1 (en) 2017-08-24
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US20170241193A1 (en) 2017-08-24
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WO2016032938A2 (en) 2016-03-03
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JP2017528310A (ja) 2017-09-28
CN106794412B (zh) 2020-12-04
CN106794412A (zh) 2017-05-31
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US20170241656A1 (en) 2017-08-24
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