GB2542507A - Air cleaning apparatus - Google Patents

Air cleaning apparatus Download PDF

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Publication number
GB2542507A
GB2542507A GB1615755.4A GB201615755A GB2542507A GB 2542507 A GB2542507 A GB 2542507A GB 201615755 A GB201615755 A GB 201615755A GB 2542507 A GB2542507 A GB 2542507A
Authority
GB
United Kingdom
Prior art keywords
air
filter
coanda
coanda device
chamber
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.)
Withdrawn
Application number
GB1615755.4A
Other versions
GB201615755D0 (en
Inventor
Baker Richard
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB201615755D0 publication Critical patent/GB201615755D0/en
Publication of GB2542507A publication Critical patent/GB2542507A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/16—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with suction devices other than rotary fans
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of 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
    • 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
    • B01D46/001—Means for connecting filter housings to supports
    • 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
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • 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
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • 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
    • B01D46/4281—Venturi's or systems showing a venturi effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • 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
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/12—Details or features not otherwise provided for transportable
    • F24F2221/125—Details or features not otherwise provided for transportable mounted on wheels
    • 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
    • F24F2221/28—Details or features not otherwise provided for using the Coanda effect
    • 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

Abstract

An apparatus for removing contaminants from ambient air includes a Coanda device (3) having an inlet (11), an outlet (13), and a chamber (6) there between, an air flow regulating valve (7) connected to said chamber and connectable to means for supplying air under pressure to said chamber via said valve, and a filter (5) attached to said outlet and for receiving and filtering air drawn into said inlet by the action of said Coanda device. Said Coanda device is an air-flow amplifier utilising the Coanda effect. The filter may comprise activated carbon, and may be attached to the Coanda device by a screw-threaded connection. The apparatus may be wall-mounted or mounted on a wheeled frame such as a trolley (23). The apparatus may comprise a hose (51). A method for removing contaminants from ambient air using a Coanda device is also described.

Description

Air Cleaning Apparatus
Field of the Invention
The invention relates to apparatus for removing contaminants, such as particulate matter, smoke, fumes or odours, from the air.
Background to the Invention
Air cleaning or filtering devices are known which include an electrical component such as a fan or a motor. However, in many situations it is desirable not to utilise equipment with an electrical component because of possible safety implications.
Statements of the Invention
According to the present invention, there is provided apparatus for removing contaminants from ambient air, the apparatus comprising a Coanda device having an inlet, an outlet, and a chamber therebetween, an air flow regulating valve connected to said chamber and connectable to means for supplying air under pressure to said chamber via said valve, and a filter attached to said outlet and for receiving and filtering air drawn into said inlet by the action of said Coanda device.
Preferably, the Coanda device has connected thereto a valve for controlling the flow of air under pressure to said chamber.
Preferably, the filter is attached to said outlet by a screw-threaded connection.
Preferably, the filter includes a filter medium comprising activated carbon.
The apparatus may be mounted in a fixed position, for instance, wall mounted.
Alternatively, the apparatus may be portable, for instance, mounted on a wheeled frame. For instance, the wheeled frame may be a trolley. The trolley may have a platform on which the filter and Coanda device are located. The apparatus may include a hose extending from the trolley and with an air inlet which may be positioned to extract air from a selected location.
The present invention also provides a method of removing contaminants from ambient air, the method comprising locating in the air to be decontaminated apparatus comprising a coanda device and, attached thereto, a filter, supplying compressed air to said coanda device to cause contaminated air to be drawn through the device and into the filter.
Brief description of the drawings
The accompanying drawings are as follows:
Figure 1 shows, in side view, of an embodiment of apparatus in accordance with the present invention;
Figure 2 is a perspective view of the apparatus of Figure 1; and Figure 3 is a perspective view of a further embodiment of apparatus in accordance with the present invention.
Detailed description of the Invention
The present invention will now be described, by way of example only, with reference to the accompanying drawings.
Referring to Figures 1 and 2 of the accompanying drawings, apparatus 1 for removing contaminants from ambient air comprises a Coanda device 3 attached to a filter unit 5. Coanda device 3 includes an annular plenum chamber 6 on which is mounted a flow controlling valve 7 to which a compressed air line is to be connected at quick connector 9. Air entering the plenum chamber 5 is injected into the throat of the unit through directed nozzles. These jets of compressed air create a vacuum at the inlet 11 of Coanda device 3 which draws into the inlet 11 the contaminated air to be treated. This air is accelerated through the Coanda device 3 and out of the device outlet 13.
Outlet 13 is connected to the filter unit 5 so that air passes into the filter unit and the contaminants are extracted. The cleaned air then passes out of the filter unit and into the surrounding environment.
The Coanda device used in the above described apparatus has no moving parts and, by utilizing compressed air by means of a powerful, efficient venturi action along in a compact design, conveys air into the filter unit at high rates. Furthermore, the device is made of a hard anodized metal so that it can handle abrasive materials over a long lifetime. Utilizing compressed air for a powerful, efficient venturi action along its length in a compact design for high capacity conveying over very large distances.
Electric motors and/or fans are not required in apparatus of the present invention since the apparatus utilises a Coanda type air mover powered by a compressed air supply. This eliminates moving parts and subsequent maintenance. It also means the device can be used in hazardous areas where electrical devices would need to intrinsically safe.
During use, valve 7 can be opened fully or used as a flow regulator by partial opening. This will determine the amount of compressed air consumed, which in turn determines the volume of air extracted at the inlet 11. Valve 7 can therefore determine the amount of energy consumed at the compressor, reducing running costs where possible.
The filter medium within filter unit 5 is protected by a metal casing. The filter medium can be specified for a number of applications, including but not limited to fumes and particulates in the atmosphere to be filtered.
The filter medium is determined by the type of contaminants that are to be removed from the atmosphere. Typically, it will consist of or include, as a primary medium source, activated carbon which will remove oil vapours, odours and other hydrocarbons from the air. The filter medium can be replaced at specific intervals. Due to the lifetime of activated carbon, typically six months, the filter medium is typically changed biannually.
In general, the filter medium is determined by the airborne pollutant to be removed. A molecular type filter medium used in the filter unit 5 can remove very many contaminants, including:-
Voc-nuisance, Voc, acids, ammonia and amines, formaldehyde and aldehydes; and vehicle exhaust, welding and cutting fumes including nitrous oxide (nox), carbon dioxide (co2), carbon mounting ozone (o3) and particulates, monoxide (co) shielding gas (e.g. argon, helium).
The apparatus is light and can be provided in a variety of sizes. The apparatus can be mounted in a fixed position, for instance, it may be wall mounted. In another embodiment, the apparatus can be portable, for instance, hand portable or mounted on a wheeled frame. A Coanda device which may be used in apparatus of the present invention may be one which is marketed in the UK as a Ring Jet Air Conveyor (registered trade mark). A suitable filter unit is marketed in the UK as Odasorb (registered trade mark). A filter unit containing activated carbon has the medium typically changed at six monthly intervals. The filter unit 5 is attached to Coanda unit 3 by a screw threaded connection, thereby allowing for ready separation for media replacement.
The volume of air consumed is in direct proportion to the volume of air/pollutant mix drawn through the Coanda unit and in to the filter.
Referring to Figure 3 of the accompanying drawings, apparatus 21 for removing contaminants is a portable device which includes a trolley 23 having a platform 25, a handle 27 at one end of the platform, a foot or shelf 29 at the other end of the platform 25, and wheels 31 also at this other end.
Mounted on trolley 21 by means of a bracket 33, attached to platform 25 adjacent handle 27, is an air cleaning device 35. Device 35 includes a filter unit 37 attached to the outlet 39 of Coanda device 41. Device 41 includes an annular plenum chamber 43 into which compressed air may be introduced via tube 45 which is provided with a flow control valve 47. Air entering the plenum chamber 43 is injected into the throat of the unit through directed nozzles. These jets of compressed air create a vacuum at the inlet 49 of Coanda device 41 which draws into the inlet 149 via hose 51 the contaminated air to be treated. This air is accelerated through the Coanda device 41 and out of the device outlet 39 into filter unit 37 and thence to atmosphere.
Hose 51 includes flexible portions 53, 55 and 57 between which are rigid sections 59 and 61, these rigid sections being epoxy painted aluminium tubing. The flexible portions are of corrugated plastics and may include a locking arrangement to maintain the portion in a particular conformation as is shown for portion 55. The free end of hose 51 provides a nozzle which may be located in the air space which is to be cleaned.
Hose 51 can be fitted with a variety of funnels to best direct flow.
Apparatus of the invention may include one Coanda device and a single filter unit as described above. Alternatively, apparatus with one Coanda device may include two or more filter units.

Claims (13)

1. Apparatus for removing contaminants from ambient air, the apparatus comprising a Coanda device having an inlet, an outlet, and a chamber therebetween, an air flow regulating valve connected to said chamber and connectable to means for supplying air under pressure to said chamber via said valve, and a filter attached to said outlet and for receiving and filtering air drawn into said inlet by the action of said Coanda device.
2. Apparatus according to Claim 1, wherein the coanda device has connected thereto a valve for controlling the flow of air under pressure to said chamber.
3. Apparatus according to Claim 1 or Claim 2 wherein the filter is attached to said outlet by a screw-threaded connection.
4. Apparatus according to any of the preceding claims, wherein the filter includes a filter medium comprising activated carbon.
5. Apparatus according to any of the preceding claims, wherein the apparatus is mounted in a fixed position.
6. Apparatus according to claim 5, wherein the apparatus is wall mounted.
7. Apparatus according to any of Claims 1 to 4, wherein the apparatus is portable.
8. Apparatus according to Claim 7, wherein the apparatus is mounted on a wheeled frame.
9. Apparatus according to Claim 8, wherein the wheeled frame is a trolley.
10. Apparatus according to Claim 9, wherein the trolley has a platform on which the filter and Coanda device are located.
11. Apparatus according to Claim 10, wherein the apparatus includes a hose extending from the trolley and with an air inlet which may be positioned to extract air from a selected location.
12. Apparatus for removing contaminants from ambient air, the apparatus being substantially as described herein with reference to the accompanying drawings.
13. A method of removing contaminants from ambient air, the method comprising locating in the air to be decontaminated apparatus comprising a Coanda device and, attached thereto, a filter, supplying compressed air to said Coanda device to cause contaminated air to be drawn through the device and into the filter.
GB1615755.4A 2015-09-15 2016-09-15 Air cleaning apparatus Withdrawn GB2542507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1516321.5A GB201516321D0 (en) 2015-09-15 2015-09-15 Air cleaning apparatus

Publications (2)

Publication Number Publication Date
GB201615755D0 GB201615755D0 (en) 2016-11-02
GB2542507A true GB2542507A (en) 2017-03-22

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GBGB1516321.5A Ceased GB201516321D0 (en) 2015-09-15 2015-09-15 Air cleaning apparatus
GB1615755.4A Withdrawn GB2542507A (en) 2015-09-15 2016-09-15 Air cleaning apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB1516321.5A Ceased GB201516321D0 (en) 2015-09-15 2015-09-15 Air cleaning apparatus

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2568462A (en) * 2017-11-09 2019-05-22 Polypipe Ltd An active carbon filter for an air vent assembly
WO2019175507A1 (en) * 2018-03-14 2019-09-19 Institut National De Recherche En Sciences Et Technologies Pour L'environnement Et L'agriculture (Irstea) Air-moving device employing coanda effect for pollinating a recipient plant using pollen collected from a donor plant
FR3107464A1 (en) * 2020-02-25 2021-08-27 Commissariat A L'energie Atomique Et Aux Energies Alternatives Vacuum cleaner usable in particular in glove boxes

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169192A (en) * 1985-06-27 1986-07-09 James David Coleman Compressed air powered suction unit
US5255412A (en) * 1991-03-14 1993-10-26 Mally Sujith N V Air amplified mini-vacuum
RO110671B1 (en) * 1990-12-10 1996-03-29 Mecanica Plopeni Plopeni Pneumatic vacuum cleaner
JPH11192409A (en) * 1998-01-06 1999-07-21 Kiyoyuki Horii Dust suction system
US6049941A (en) * 1998-06-18 2000-04-18 Technical Innovations, Inc. Portable backpack vacuum system
DE102005009324A1 (en) * 2005-02-24 2006-09-07 Technische Universität Dresden Decontaminating a building near the surface area comprising irradiating the surface with an energetic ray, melting the surface and drawing the solidifying melt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169192A (en) * 1985-06-27 1986-07-09 James David Coleman Compressed air powered suction unit
RO110671B1 (en) * 1990-12-10 1996-03-29 Mecanica Plopeni Plopeni Pneumatic vacuum cleaner
US5255412A (en) * 1991-03-14 1993-10-26 Mally Sujith N V Air amplified mini-vacuum
JPH11192409A (en) * 1998-01-06 1999-07-21 Kiyoyuki Horii Dust suction system
US6049941A (en) * 1998-06-18 2000-04-18 Technical Innovations, Inc. Portable backpack vacuum system
DE102005009324A1 (en) * 2005-02-24 2006-09-07 Technische Universität Dresden Decontaminating a building near the surface area comprising irradiating the surface with an energetic ray, melting the surface and drawing the solidifying melt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Walker Filtration, 2013, "Odasorb", walkerfiltration.com, [online], Available from: http://www.walkerfiltration.com/files/Odasorb_Datasheet_-_WFL,_WFP,_WFJ.pdf [Accessed 18 December 2016] *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2568462A (en) * 2017-11-09 2019-05-22 Polypipe Ltd An active carbon filter for an air vent assembly
GB2568462B (en) * 2017-11-09 2023-04-12 Polypipe Ltd An active carbon filter for an air vent assembly
WO2019175507A1 (en) * 2018-03-14 2019-09-19 Institut National De Recherche En Sciences Et Technologies Pour L'environnement Et L'agriculture (Irstea) Air-moving device employing coanda effect for pollinating a recipient plant using pollen collected from a donor plant
FR3078859A1 (en) * 2018-03-14 2019-09-20 Institut National De Recherche En Sciences Et Technologies Pour L'environnement Et L'agriculture (Irstea) AERAULIC DEVICE WITH COANDA EFFECT FOR THE POLLINATION OF A RECEIVING PLANT FROM POLLEN CAPTURE OF A DONOR PLANT
CN111970920A (en) * 2018-03-14 2020-11-20 法国农业、粮食和环境研究所 Air moving device for pollinating recipient plant with pollen collected from donor plant using coanda effect
US20210045306A1 (en) * 2018-03-14 2021-02-18 Institut National de Recherche Pour I'Agriculture, I'Alimentation et I'Environnement Air-moving device employing coanda effect for pollinating a recipient plant using pollen collected from a donor plant
FR3107464A1 (en) * 2020-02-25 2021-08-27 Commissariat A L'energie Atomique Et Aux Energies Alternatives Vacuum cleaner usable in particular in glove boxes

Also Published As

Publication number Publication date
GB201615755D0 (en) 2016-11-02
GB201516321D0 (en) 2015-10-28

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)