WO2021250551A1 - Système de filtration comprenant un milieu filtrant - Google Patents

Système de filtration comprenant un milieu filtrant Download PDF

Info

Publication number
WO2021250551A1
WO2021250551A1 PCT/IB2021/054995 IB2021054995W WO2021250551A1 WO 2021250551 A1 WO2021250551 A1 WO 2021250551A1 IB 2021054995 W IB2021054995 W IB 2021054995W WO 2021250551 A1 WO2021250551 A1 WO 2021250551A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter media
exhaust hood
securement
filtration system
article
Prior art date
Application number
PCT/IB2021/054995
Other languages
English (en)
Inventor
John F. Reed
Martin J. O. WIDENBRANT
Matthew W. Gorrell
John B. STENDER
Chad E. NORDLING
Byron E. Trotter
Original Assignee
3M Innovative Properties Company
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 Company filed Critical 3M Innovative Properties Company
Publication of WO2021250551A1 publication Critical patent/WO2021250551A1/fr

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2035—Arrangement or mounting of filters
    • 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
    • B01D2265/02—Non-permanent measures for connecting different parts of the filter
    • B01D2265/023—Non-permanent measures for connecting different parts of the filter making use of magnetic forces
    • 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

Definitions

  • Filters are used for many purposes, such as removing small suspended particulates from fluid flows. Filtration systems can include filter media attached to portions of the filtration system via different attachment technologies.
  • a filtration system can include an exhaust hood defining an exhaust hood intake and a filter media disposed proximate the exhaust hood.
  • the filter media can define a filter media intake side and an opposed filter media exhaust side.
  • the filtration system can further include a securement system adapted to releasably secure the filter media to the exhaust hood, and the securement system can include one or more securement elements.
  • a filtration system can include an exhaust hood defining an exhaust hood intake and a mounting article secured to the exhaust hood.
  • An article securement system can be adapted to secure the mounting article to the exhaust hood, and the article securement system can include one or more article securement elements.
  • a filter media can define a filter media intake side and an opposed filter media exhaust side.
  • a filter media securement system can be adapted to releasably secure the filter media to the mounting article, and the filter media securement system can include one or more filter media securement elements.
  • FIG. 1 is schematic system view of a filter securement system including cooking equipment and an exhaust system, according to exemplary embodiments of the present disclosure.
  • FIGS. 2-4 are schematic views of a filter mounting assembly including an exhaust hood, a filter media and a securement system, according to exemplary embodiments of the present disclosure.
  • FIGS. 5-7 are schematic views of another filter mounting assembly including an exhaust hood, a filter media, a mounting article, a mounting article securement system and a filter media securement system, according to exemplary embodiments of the present disclosure.
  • Filters can be used in a wide range of applications.
  • filters may be designed for general air filtration to filter primarily airborne particulates.
  • filters may be designed to filter particles smaller than 10 micrometers in diameter, smaller than 5 micrometers in diameter, smaller than 2.5 micrometers in diameter, smaller than 1.0 micrometer in diameter, smaller than 0.5 micrometers in diameter or smaller than 0.3 micrometers in diameter, among others.
  • Filters can also be used in a specific location, such as an exhaust hood, for grease filtering in a commercial cooking environment.
  • an exhaust hood In commercial kitchens, grease capture in exhaust hoods may be important for health, safety and environmental reasons. However, grease buildup in and around an exhaust hood or an exhaust system may pose a fire hazard.
  • baffles can be made of a non-flammable material, such as a metal or metal alloy, including stainless steel, galvanized steel or aluminum.
  • the baffle can prevent fire from spreading from the cooking surface into the exhaust system.
  • the present disclosure provides various embodiments of an improved filtration system.
  • Versus conventional baffles the present disclosure can provide a low-cost grease-trapping solution that is lightweight and easy to install in an exhaust hood.
  • Portions of the disclosed filtration system can occupy a range hood position traditionally occupied by conventional baffles.
  • Elements of the disclosed filtration system can replace or augment traditional baffles in an exhaust hood, thereby requiring minimal or no modifications to existing exhaust systems.
  • Other benefits and uses are also foreseen.
  • moving from the cooking equipment through the exhaust system and past the blower can be defined as moving downstream, while moving in the opposite direction can be defined as moving upstream.
  • FIG. 1 is a schematic sectional view of a filtration system 40 including cooking equipment 50 and an exhaust system 54.
  • the cooking equipment 50 can be an oven, stove, grill, fryer, broiler or any other commonly used cooking apparatus known to those skilled in the art and can further define a cooking surface 52.
  • the exhaust system 54 can include an exhaust hood 58 defining an exhaust hood flange 60.
  • the exhaust hood flange 60 can releasably or permanently retain a baffle.
  • An exhaust hood intake 59 can be defined by the exhaust hood 58, and can represent an upstream portion of the exhaust hood 58 and/or a portion of the exhaust hood 58 into which gasses or fluid flows enter the exhaust hood 58.
  • the exhaust hood 58 can be positioned to capture all or a portion of grease and other particulates generated by the use of the cooking equipment 50.
  • a blower 66 can, via a duct 62, create a reduced-pressure area proximate the cooking equipment 50 (relative to ambient pressure) that can encourage grease and other particulates generated by use of the cooking equipment 50 to enter the exhaust system 54 via the exhaust hood 58.
  • air, gasses, grease and/or particulates can travel into the exhaust system 54 via the exhaust hood 58 and filter media 100, as represented by arrow 70.
  • the filtered air, gasses and any remaining grease and/or particulates can then pass through the duct 62 and blower 66 before exiting the exhaust system 54, as represented by arrow 74.
  • Arrows 70 and 74 represent portions of a fluid flow traveling from the cooking surface 52, through the exhaust hood 58 and out through the rest of the exhaust system 54.
  • a filter media 100 can be disposed proximate the exhaust hood 58, and a filter media intake side 102 facing upstream and a filter media exhaust side 104 facing downstream are also illustrated in FIG. 1.
  • the filter media 100 can be seen proximate the exhaust hood 58 and exhaust hood flange 60.
  • the filter media 100 can be secured to the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59 via a securement system 120.
  • FIG. 2 illustrates an embodiment where the securement system 120 secures the filter media 100 to the exhaust hood flange 60, and the filter media 100 is be disposed substantially outside of the exhaust hood 58.
  • the securement system 120 can include one or more securement elements 124a, 124b.
  • securement elements 124a, 124b are shown in FIG. 2, while it is to be understood that more or fewer securement elements can be included in the securement system 120.
  • the securement elements 124a, 124b can releasably or permanently secure the filter media 100 to the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the phrase ‘releasably’ as applied to securement can indicate an easy separation by a user, a separation by a user requiring a low amount of force, a design of the securement element 124a, 124b and/or the elements being releasably secured that facilitates their easy separation, and/or the absence of a permanent or lasting securement technology including, but not limited to, weldments, strong adhesives, rivets, brazing, soldering or any other technology known to those skilled in the art.
  • the securement elements 124a, 124b can include any mechanical, chemical or electrical technology known to those skilled in the art and suited to secure, or releasably secure, the filter media 100 to the to the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the securement elements 124a, 124b can include magnets, adhesives, mechanical fasteners, biased mechanical fasteners, hook-and-loop panels, tape, press-fits, double-sided tape, clips, electrostatics, static cling, 3M Dual Lock Fasteners, suction devices and/or any other suitable technology.
  • hooks or loops can be formed on the exhaust hood 58, exhaust hood flange 60 and/or exhaust intake
  • any of these techniques can releasably secure the filter media 100 to the securement elements 124a, 124b, can releasably secure the securement elements 124a, 124b to a portion of the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59, and/or can releasably secure the filter media 100 to a portion of the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the filter media 100 can extend from one side of the exhaust hood 58 to an opposed side of the exhaust hood 58, from one side of the exhaust hood flange 60 to an opposed side of the exhaust hood flange 60 and/or from one side of the exhaust hood intake 59 to an opposed side of the exhaust hood intake 59.
  • the filter media 100 can be seen proximate the exhaust hood intake
  • the filter media 100 can be disposed, at least partially or wholly, within the exhaust hood flange 60.
  • one or more of securement elements 124a, 124b can be disposed, at least partially or wholly, within the exhaust hood flange 60.
  • the filter media 100 can be seen within the exhaust hood 58.
  • the filter media 100 can be disposed, at least partially or wholly, within the exhaust hood 58.
  • one or more of the securement elements 124a, 124b can be disposed, at least partially or wholly, within the exhaust hood flange 60.
  • the mounting article 140 can include, or be, one or more elements secured, or releasably secured, to the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the mounting article 140 is a baffle.
  • the mounting article 140 is a filtering device.
  • the mounting article 140 is a listed component for use in an exhaust hood 58.
  • the mounting article 140 is a structural frame that serves to facilitate the mounting of the filter media 100 on, proximate or within the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the mounting article 140 can include fiberglass, steel, stainless steel, aluminum, metals, metal alloys, polymers, carbon, ceramics, organic materials, braided materials, fire-resistant materials, 3M NEXTEL ceramic fibers and textiles, cardboard, chip board or any other material known to those skilled in the art.
  • the mounting article 140 can extend from one side of the exhaust hood 58 to an opposed side of the exhaust hood, 58 from one side of the exhaust hood flange 60 to an opposed side of the exhaust hood flange 60 and/or from one side of the exhaust hood intake 59 to an opposed side of the exhaust hood intake 59.
  • the mounting article 140 can be releasably or permanently secured to the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59 via the article securement system 144.
  • the article securement system 144 can include one or more article securement elements 148a, 148b. In particular, two article securement elements 148a, 148b are shown in FIG. 5, while it is to be understood that more or fewer article securement elements can be included in the article securement system 144.
  • the article securement elements 148a, 148b can releasably or permanently secure the mounting article 140 to the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the phrase ‘releasably’ as applied to article securement can indicate an easy separation by a user, a separation by a user requiring a low amount of force, a design of the article securement element 148a, 148b and/or the elements being releasably secured that facilitates their easy separation, and/or the absence of a permanent or lasting securement technology including, but not limited to, weldments, strong adhesives, rivets, brazing, soldering or any other technology known to those skilled in the art.
  • the article securement elements 148a, 148b can include any mechanical, chemical or electrical technology known to those skilled in the art and suited to secure the mounting article 140 to the to the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the article securement elements 148a, 148b can include magnets, adhesives, mechanical fasteners, biased mechanical fasteners, hook-and-loop panels, tape, press-fits, double-sided tape, clips, electrostatics, 3M Dual Lock Fasteners, static cling, suction devices and/or any other suitable technology.
  • hooks or loops can be formed on the exhaust hood 58, exhaust hood flange 60 and/or exhaust intake 58 and corresponding engaging hooks or loops can be formed on the mounting article 140. It is also to be understood that any of these techniques can releasably secure the mounting article 140 to the article securement elements 148a, 148b, can releasably secure the article securement elements 148a, 148b to a portion of the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59, and/or can releasably secure the mounting article 140 to a portion of the exhaust hood 58, exhaust hood flange 60 and/or exhaust hood intake 59.
  • the mounting article 140 can be releasably or permanently secured to the filter media 100 via the filter media securement system 154.
  • the filter media securement system 154 can include one or more filter media securement elements 158a, 158b.
  • two filter media securement elements 158a, 158b are shown in FIG. 5, while it is to be understood that more or fewer filter media securement elements can be included in the filter media securement system 154.
  • the filter media securement elements 158a, 158b can releasably or permanently secure the mounting article 140 to the filter media 100.
  • the phrase ‘releasably’ as applied to filter media securement can indicate an easy separation by a user, a separation by a user requiring a low amount of force, a design of the filter media securement element 158a, 158b and/or the elements being releasably secured that facilitates their easy separation, and/or the absence of a permanent or lasting securement technology including, but not limited to, weldments, strong adhesives, rivets, brazing, soldering or any other technology known to those skilled in the art.
  • the filter media securement elements 158a, 158b can include any mechanical, chemical or electrical technology known to those skilled in the art and suited to secure the mounting article 140 to the to the filter media 100.
  • the filter media securement elements 158a, 158b can include magnets, adhesives, mechanical fasteners, biased mechanical fasteners, hook-and-loop panels, 3M Dual Lock Fasteners, tape, press-fits, double-sided tape, clips, electrostatics, static cling, suction devices and/or any other suitable technology.
  • hooks or loops can be formed on the mounting article 140 and corresponding engaging hooks or loops can be formed in the filter media 100.
  • any of these techniques can releasably secure the mounting article 140 to the filter media securement elements 158a, 158b, can releasably secure the filter media securement elements 158a, 158b to the filter media 100, and/or can releasably secure the mounting article 140 to the filter media 100.
  • the filter media 100 and mounting article 140 can be seen proximate the exhaust hood intake 59 and exhaust hood flange 60.
  • the filter media 100 and/or the mounting article 140 can be disposed, at least partially or wholly, within the exhaust hood flange 60.
  • one or more of article securement elements 148a, 148b and filter media securement elements 158a, 158b can be disposed, at least partially or wholly, within the exhaust hood flange 60.
  • the filter media 100 and mounting article 140 can be seen within the exhaust hood 58.
  • the filter media 100 and/or mounting article 140 can be disposed, at least partially or wholly, within the exhaust hood 58.
  • one or more of the article securement elements 148a, 148b and filter media securement elements 158a, 158b can be disposed, at least partially or wholly, within the exhaust hood 58.
  • the filter media 100 can include different materials or the same material.
  • the filter media 100 can include fiberglass, steel, stainless steel, aluminum, aluminum foil, perforated aluminum foil, metals, metal alloys, polymers, carbon, ceramics, organic materials, braided materials, fire-resistant materials, 3M NEXTEL Ceramic Fibers and Textiles, cardboard, chip board or any other material known to those skilled in the art.
  • the filter media 100 can include fibers that form a non-woven and/or non-knitted material.
  • the non-woven and/or non-knitted material can describe materials that are bonded together by chemical, mechanical, heat or solvent treatments, rather than by knitting or weaving.
  • the non-woven material can be lofty, carded, air-laid or mechanically bonded (such as spun-lace, needle-entangled or needle-tacked).
  • the non-woven material can be bonded (e.g., the fibers are bonded to one another at various locations) or non-bonded.
  • the filter media 100 can include a heat-setting material or a melt material that provides some or all of the bonding in the non-woven material, such as a flake, powder, fiber or a combination thereof.
  • the heat-setting material can include any suitable thermoplastic or thermoset polymer, such as polyester, polyethylene terephthalate (PET), polypropylene (PP) or a combination thereof. After melting and/or heat bonding, the flake, powder and/or fiber can melt and bond the fibers together, increasing a strength and stability of the material.
  • the filter media 100 can include a Flame-Resistant (FR) material, Oxidized Polyacrylonitrile fiber (OPAN), modacrylic, flame-resistant rayon, Polyacrylonitrile (PAN), Polyphenylene Sulfide (PPS), Polyethylene Terephthalate (PET), Polypropylene (PP), Kapok Fiber, Poly Lactic Acid (PLA), cotton, nylon, polyester, rayon (e.g., non-flame-retardant rayon), wool, basalt, fiberglass, ceramic or a combination thereof.
  • FR Flame-Resistant
  • OPAN Oxidized Polyacrylonitrile fiber
  • PAN Polyacrylonitrile
  • PPS Polyphenylene Sulfide
  • PET Polyethylene Terephthalate
  • PP Polypropylene
  • Kapok Fiber Poly Lactic Acid
  • PDA Poly Lactic Acid
  • the filter media 100 can include a conventional filter media material (such as polyolefin) that has been treated or coated to be flame-resistant, a conventional filter media material and a metal mesh and/or a flame-resistant barrier.
  • the fibers can be bicomponent fibers, or fibers made of more than one material, such as those listed in this disclosure.
  • the filter media can be pleated, non-pleated and/or multilayered (which can include a multi-layer web including a woven layer, such as a woven basalt layer), based upon application.
  • the filter media 100 can, in various embodiments, include a coating, a heat-setting or melt material (e.g., powder, flakes and/or fibers), a metal fiber, a glass fiber, a ceramic fiber, an aramid fiber, a sorbent, an intumescent material (e.g., a fiber or a particle), mica, diatomaceous earth, glass bubbles, carbon particles or a combination thereof.
  • a heat-setting or melt material e.g., powder, flakes and/or fibers
  • a metal fiber e.g., powder, flakes and/or fibers
  • a glass fiber e.g., a glass fiber
  • ceramic fiber e.g., a ceramic fiber
  • an aramid fiber e.g., aramid fiber
  • a sorbent e.g., a fiber or a particle
  • an intumescent material e.g., a fiber or a particle
  • mica e.g., diatomaceous
  • Flame- resistant materials can be halogen-containing flame retardants or non-halogenated flame retardants.
  • coatings or additives can include expandable graphite, vermiculite, ammonium polyphosphate, alumina trihydrate (ATH), magnesium hydroxide (Mg(OH)2), aluminum hydroxide (AI(OH)3), molybdate compounds, chlorinated compounds, brominated compounds, antimony oxides, organophosphorus compounds or a combination thereof.
  • the filter media 100 can include airlaid nonwoven web prepared using 90% oxidized polyacrylonitrile (OPAN) staple fiber with a denier diameter of 5.0dtex x 60mm (commercially available under the trade designation ZOLTEKTM OX) and 10% binding fiber (high temperature polyester binding or melty fiber with a denier diameter of 6.7dtex x 60 mm, commercially available under the trade designation TREVIRA® T270) with an area weight of 150 grams per square meter.
  • OPAN oxidized polyacrylonitrile
  • the filter media 100 can include airlaid nonwoven web prepared using nylon staple fiber with a denier diameter of 1000 dtex, or denier, and 10% binding fiber (commercially available under the trade designation TREVIRA® T270) with an area weight of 550 grams per square meter.
  • the filter media 100 can include airlaid nonwoven web prepared using 40% 5.0dtex x 60 mm OPAN staple fiber, 40% 500 dtex, or denier, PET staple fiber (commercially available from David C. Poole Company, Inc., Greenville, SC), and 20% 15 dtex, or denier, binding fiber, such as is commercially available from Huvis (Seoul, South Korea) with an area weight of 225 grams per square meter.
  • the filter media 100 can have a constant, substantially constant or variable thickness as measured from the filter media intake side 102 to the filter media exhaust side 104.
  • the filter media 100 can have a thickness as measured from the filter media intake side 102 to the filter media exhaust side 104 of, of about, at least or at most: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm,
  • one or more of the securement elements 124a, 124b, mounting article 140, article securement elements 148a, 148b and filter media securement elements 158a, 158b can include, or be made of, any of the above-listed materials described in relation to the filter media 100.
  • the adhesives included with the securement elements 124a, 124b, article securement elements 148a, 148b and/or filter media securement elements 158a, 158b can include (the same or different) pressure-sensitive adhesives (PSAs).
  • PSAs can include tackified natural rubbers, synthetic rubbers, tackified styrene block copolymers, (meth)acrylics, poly(alpha-olefins) and/or silicones.
  • the adhesives can be oxidatively stable (i.e., maintains adhesion over time) and can exhibit low adhesion build over time.
  • the adhesives can also include (meth)acrylic PSAs being from 80 to 100 weight percent of a C3 — C12 alkyl ester component such as isooctyl acrylate, 2-ethyl-hexyl acrylate and/or n-butyl acrylate, and from 0 to 20 weight percent of a polar component such as acrylic acid, methacrylic acid, ethylene vinyl acetate, N-vinyl pyrrolidone and/or styrene macromer.
  • Such (meth)acrylic PSAs can be used as 100% solids, which can be hot-melt coated or processed via a UV-cured low-viscosity syrup.
  • the (meth)acrylic PSA’s can be dispersed in a solvent for coating and/or the (meth)acrylic PSA can be synthesized as a latex polymer dispersion for water-based coating.
  • the disclosed systems and filter media mounting technologies provide a lightweight and cost-effective grease-trapping solution that reduces or prevents the buildup of grease on exhaust system components (such as a baffle, mounting article, duct, blower or exhaust hood), can be installed in or proximate a conventional baffle location in an exhaust hood and facilitates the easy removal and replacement of releasably secured filter media.
  • exhaust system components such as a baffle, mounting article, duct, blower or exhaust hood

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ventilation (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne un système de filtration pour filtrer des particules en suspension dans l'air. Le système de filtration comprend une hotte d'évacuation définissant une admission de hotte d'évacuation. Un milieu filtrant est disposé à proximité de la hotte d'évacuation, et le milieu filtrant définit un côté d'admission de milieu filtrant et un côté d'évacuation de milieu filtrant opposé. Un système de fixation est conçu pour fixer de manière amovible le milieu filtrant à la hotte d'évacuation, et le système de fixation comprend un ou plusieurs éléments de fixation.
PCT/IB2021/054995 2020-06-10 2021-06-07 Système de filtration comprenant un milieu filtrant WO2021250551A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063037251P 2020-06-10 2020-06-10
US63/037,251 2020-06-10

Publications (1)

Publication Number Publication Date
WO2021250551A1 true WO2021250551A1 (fr) 2021-12-16

Family

ID=78847114

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/054995 WO2021250551A1 (fr) 2020-06-10 2021-06-07 Système de filtration comprenant un milieu filtrant

Country Status (1)

Country Link
WO (1) WO2021250551A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114353142A (zh) * 2022-01-07 2022-04-15 杭州老板电器股份有限公司 一种集烟组件、吸油烟机及集烟组件的控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999471A (en) * 1975-02-24 1976-12-28 American Air Filter Company, Inc. Filter hood device
US20150128804A1 (en) * 2013-11-13 2015-05-14 Jordan Salpietra Filters, filter mounts, and methods of mounting filters
US20170354910A1 (en) * 2011-01-31 2017-12-14 Streivor, Inc. Multi-stage hood filter system
WO2019182877A1 (fr) * 2018-03-21 2019-09-26 Salpietra Jordan Systèmes et procédés permettant d'indiquer la durée de vie d'un filtre
KR102053799B1 (ko) * 2019-06-28 2019-12-09 (주)한빛엔지니어링건축사사무소 공동주택의 주방용 레인지 후드장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999471A (en) * 1975-02-24 1976-12-28 American Air Filter Company, Inc. Filter hood device
US20170354910A1 (en) * 2011-01-31 2017-12-14 Streivor, Inc. Multi-stage hood filter system
US20150128804A1 (en) * 2013-11-13 2015-05-14 Jordan Salpietra Filters, filter mounts, and methods of mounting filters
WO2019182877A1 (fr) * 2018-03-21 2019-09-26 Salpietra Jordan Systèmes et procédés permettant d'indiquer la durée de vie d'un filtre
KR102053799B1 (ko) * 2019-06-28 2019-12-09 (주)한빛엔지니어링건축사사무소 공동주택의 주방용 레인지 후드장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114353142A (zh) * 2022-01-07 2022-04-15 杭州老板电器股份有限公司 一种集烟组件、吸油烟机及集烟组件的控制方法

Similar Documents

Publication Publication Date Title
AU745652B2 (en) A filter and filter assembly
US11181281B2 (en) Multi-stage hood filter system
US9242200B2 (en) Grease removal apparatus, systems and methods
WO2021250551A1 (fr) Système de filtration comprenant un milieu filtrant
KR20180066129A (ko) 필터 장치, 방법 및 시스템
WO2022034442A1 (fr) Ensemble filtrant multicouche
JP2022511295A (ja) フィルタアセンブリ
JP2009136735A (ja) エレクトレット濾材およびフィルタユニット
WO2022064332A1 (fr) Filtre avec additifs à électret
JP4882985B2 (ja) エレクトレット濾材およびフィルタユニット
US20230015051A1 (en) Filter Having Multiple Denier Fibers
WO2021205281A1 (fr) Système de filtration à déflecteur
WO2021186318A2 (fr) Système de filtration
CA2979980A1 (fr) Filtre de hotte multi-etage
JP2021536360A (ja) 耐火性フィルタ
JP2016112493A (ja) 空気清浄用フィルタ
US20220339571A1 (en) Filter securement assembly
TW202041264A (zh) 過濾器總成
JP2013034923A (ja) 難燃性フィルタ
EP3769013A1 (fr) Systèmes et procédés permettant d'indiquer la durée de vie d'un filtre
WO2021079269A1 (fr) Ensemble filtre
EP4248143A1 (fr) Filtres, supports et procédés de montage de filtres
TW202122148A (zh) 集塵濾布及袋濾器
NZ336178A (en) Grease pre-filter predominately of wool, and filter assembly

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21823025

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21823025

Country of ref document: EP

Kind code of ref document: A1