EP0888073B1 - Traitement de l'air - Google Patents
Traitement de l'air Download PDFInfo
- Publication number
- EP0888073B1 EP0888073B1 EP97903501A EP97903501A EP0888073B1 EP 0888073 B1 EP0888073 B1 EP 0888073B1 EP 97903501 A EP97903501 A EP 97903501A EP 97903501 A EP97903501 A EP 97903501A EP 0888073 B1 EP0888073 B1 EP 0888073B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- filtration
- combination
- units
- section
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B37/00—Tables adapted for other particular purposes
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2200/00—General construction of tables or desks
- A47B2200/06—Desks with inlet and evacuation of air
Definitions
- the subject invention relates to air treatment at a table.
- U.S. 4,886,526 discloses a removable filter cartridge comprising an inner electrically conductive screen sandwiched between two sheets of dielectric filtration material with electrically conductive screens on either side of the cartridge.
- the inner electrically conductive screen has smaller dimensions than the outer electrically conductive screens.
- the present invention aims to provide a table in combination with air treatment means which provides improved air filtration efficiency.
- the present invention also aims to provide a table in combination with air treatment means with greater commercial viability.
- the present invention provides a table in combination with air treatment means, said table comprising a table top and said air treatment means comprising air inlet means in communication with the environment above said table top, air induction means, housing means, air filtration means, an air distribution space within said housing means, bounded by said filtration means, and air outlet means of said housing means, the air induction means being operable to draw air from said environment via said air inlet means into said air distribution space, and thence through said air filtration means and through said air outlet means, and the air flow cross-section of said filtration means being at least 10 times greater than the minimum air flow cross-section at said air inlet means.
- the air filtration means is preferably electrical air filtration means, for example, polarising air filtration means.
- the air filtration means may comprise chemical air filtration means, a carbon filter for example.
- the air flow cross-section of the filtration means is at least 15 times greater than the air flow cross-section at the air inlet means. More preferably, the air flow cross-section of the filtration means is at least 20 times greater than the air flow cross-section at the air inlet means.
- the air filtration means may comprise a plurality of polarising filter units, each of which units lies along a respective portion of a periphery of said air distribution space and a number of said units, providing a group of said units, being electrically connected such that the units of said number of said units of said group are operable as a unitary electrical air filter.
- the filter units There may be a plurality of groups of the filter units, the units of each group being electrically connected such that the units of each group are operable as a unitary polarising filter.
- the totality of the units are electrically connected so as to form a single unitary filter.
- the air flow cross-section of the totality of the filtration units is at least 10 times greater than the air flow cross-section at the air inlet means. More preferably, the air flow cross-section of the totality of the filtration units is at least 15 times greater than the air flow cross-section at the air inlet means. More preferably still, the air flow cross-section of the totality of the filtration units acting as a unitary filter is at least 20 times greater than the air flow cross-section at the air inlet means.
- the table may be a dining table, a coffee table, a desk, a work bench, a bar, a counter, a consul or similar.
- the table may be round, square, rectangular, polygonal, L-shaped, oval or of other shape.
- the outer periphery of the air inlet means is located at no more than one metre from the outer edge of the table top or from the position occupied by a person when seated at the table.
- the air inlet means is located no more than 0.6m from the outer edge of the table top.
- the air inlet means may comprise a grille or gauze mesh.
- the holes in the air inlet grille or mesh should be of large enough dimensions as to ensure that the flow of air through the inlet means is not impeded, but are of small enough dimensions as to ensure that objects such as cigarette butts cannot pass through the air inlet means.
- the air inlet means preferably comprises a continuous wall, which extends upwards of the table top.
- the wall acts to raise the effective capture zone of the air inlet to a location above the surface of the table top.
- the location of the effective capture zone depends upon the height above the table top to which the protective wall extends.
- the wall acts to deter users from accidentally blocking the air inlet means as a result of, say, placing an object on top of the air inlet means.
- the air induction means comprises a fan.
- a major proportion of the total surface area of the upwardly extending wall(s) of the housing preferably comprises the air outlet means.
- the air flow cross-section at the air outlet means is preferably not less than, or not substantially less than, that of the air filtration means.
- the air outlet means may comprise a grille or gauze mesh.
- the housing may comprise, for example, three or more upwardly extending walls, or it may be of upwardly extending cylindrical conformation.
- the table top may form the upper wall of the housing and the base of the housing may be parallel to the table top.
- the housing is preferably secured either directly or indirectly to the table top.
- the housing is secured to the underside of the table top. It is also advantageous that the housing is removably secured to the table top.
- the filtration means is arranged so that the air flow entering the air distribution space does not pass through the filtration means without first being subject to a change of direction.
- the change of direction may be, for example, through 90 degrees or thereabouts and may be from generally downwards to generally horizontal.
- the hereinabove mentioned polarising filter units are preferably arranged substantially parallel to the upwardly extending walls of the housing.
- the filter units abut one another so as to form a substantially continuous wall of filtration units about the periphery of the air distribution space.
- the periphery in respect of which the filter units lie is the periphery of the, or a horizontal cross-section of the air distribution space.
- the filtration means may provide the air outlet means.
- a polarising filter provided for use in accordance with the present invention preferably comprises a first electrically conductive mesh screen sandwiched between two sheets of dielectric filtration material in combination with a second electrically conductive mesh screen.
- the first screen is held at a DC high voltage potential, preferably a positive potential, relative to the second screen, which second screen is preferably earthed or held at a ground potential.
- the potential difference between the first screen and the second screen may be in the range of 4-10kV.
- the potential difference between the first screen and the second screen is in the range of 4-7kV.
- the first screen and the two dielectric material sheets are interattached, thus to provide a tripartite, unitary cartridge, which cartridge may be removed, and disposed of, when required, and replaced by a fresh such cartridge.
- the filter is comprised of a number of electrically connected filter units, it is preferable that each of the units comprises a removable cartridge, which cartridge again may comprise a first screen sandwiched between dielectric material sheets.
- An air filtration means comprising a polarising filter may also comprise a chemical filter, a carbon filter for example. These carbon filters are preferably positioned downstream of the polarising filter units so that the air flows consecutively through the polarising filter and then the carbon filter.
- reference numeral 1 generally designates a table top and reference numeral 5 generally designates air treatment means.
- a protective wall 2 which is suitably of circular cross-section in plan view, surrounds the air inlet 3, which air inlet 3 comprises a grille 3'.
- the protective wall 2 may extend about 10cm above the upper surface of the table top 1.
- the air treatment means 5 comprises a housing 4, the major area of the upwardly extending walls of the housing 4 taking the form of a grille thus providing air outlet means 9a, 9b, 9c and 9d.
- the base 12 of the housing 4 is substantially non air-permeable and comprises no air outlet.
- the air treatment means 5 further comprises a fan 6 providing air induction means, an air distribution space 7, and polarising filtration means 13 taking the form of a unitary polarising filter.
- the filter is provided by tripartite unitary cartridges 8a, 8b, 8c and 8d, each cartridge comprising a first metal mesh screen 14 sandwiched between two sheets of dielectric filtration material 15 and 15', in combination with a second earthed metal mesh screen 11.
- the air flow cross-section of the filtration means is the sum of the cross-sectional areas of the faces of the filters 8a-d which faces bound the air distribution space 7, i.e. for a tripartate filter unit only the cross-sectional area of a single layer of the unit is taken into account.
- the first screens 14 of each of the cartridges 8a-d are connected together by means of electrical connections. Electrical supply means (not shown) are provided respectively for the cartridges 8a-d and for the fan 6. The electrical supply to the screens 14 of the cartridges 8a-d provides a positive charge of 6kV. Screen 11, which is electrically continuous, and may be mechanically continuous, is held at earth potential.
- the air treatment means 5 is essentially as that shown in Figures 1 and 2 excepting that additional filters 10a, 10b, 10c and 10d comprising granular carbon are located parallel and adjacent to the polarising filter units provided by cartridges 8a-d and earthed screen 11.
- the smoke entrained in air passes via the air inlet 3 into the air distribution space 7 by means of the fan 6.
- Filtered air then passes out of air outlet means 9a-d via cartridges 8a-d, earthed screen 11 and granular carbon filters 10a-d.
- the smokers' ventilated table as illustrated in Figure 3 was utilised.
- the air flow cross-section of the air inlet 3 was 0.018m 2 .
- the air flow cross-section of the cartridges 8a-d of the polarising filter was 0.270m 2 .
- the air flow cross-section of the filtration means was therefore 15 times greater than the air flow cross-section of the air inlet means.
- the smokers' ventilation table was located in a closed room of known volume. Without the air treatment means in operation, four cigarettes were lit and allowed to smoulder at a distance of approximately 0.2m from the outer periphery of the air inlet means 3.
- the mean peak concentration of particulate matter in the air of the closed room was found to be approximately 1150 ⁇ gm -3 .
- the mean peak concentration of particulate matter in the atmosphere was then found to be approximately 546 ⁇ gm -3 .
- the air treatment means therefore effected an approximate 53% reduction in the particulate matter in the closed room.
- Example 1 The apparatus as described in relation to Example 1 was used in order to determine the time taken for the concentration of particulate matter in the air of the closed room to decrease from the peak value to half of the peak value, i.e. the half-life of the concentration of particulate matter in the air.
- the peak value was obtained by lighting four cigarettes and allowing them to smoulder in the closed room.
- the mean peak value was again found to be approximately 1150 ⁇ gm -3 .
- the mean velocity of the air entering the air treatment means of Example 1 was measured and found to be 3.25ms -1 .
- the mean velocity of the air leaving the air treatment means was measured and found to be approximately 0.26ms -1 .
- the air residence time of the polarising filter was calculated therefrom to be approximately 0.1 seconds.
- the residence time of air passing through a standard ceiling mounted air filtration means was calculated to be approximately 0.01 seconds.
- the standard ceiling mounted filtration means tested was a Colt ConditionAir (Trade Name) filter, which Colt filtration means comprised an air flow cross-section at the air inlet in the region of that of the air flow cross-section of the filtration means.
- the Colt ConditionAir filter is as that as generally described in EP 0 585 054.
- the ratio of the cross-section of the filtration means to that of the air inlet means in accordance with an aspect of the present invention facilitates a greater residence time of the air flow in the filtration means. Such a greatly increased residence time effects a significantly higher filtration efficiency.
- the air distribution space 7 serves the purpose of ensuring an even air distribution over the full air flow cross-section of the filtration means.
- An advantage deriving from the nature of the second aspect of the invention is that although the polarising filter units are electrically connected so that the units operate as a unitary polarising filter, being separate units each unit can be removed and replaced individually and the units can be packed flat for storage and transit.
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Electrostatic Separation (AREA)
- Filtering Materials (AREA)
Abstract
Claims (9)
- Table en combinaison avec des moyens de traitement d'air (5), ladite table comportant un plateau de table (1) et lesdits moyens de traitement d'air (5) comportant des moyens d'entrée d'air (3) en communication avec l'environnement existant au-dessus dudit plateau de table (1), des moyens d'introduction d'air (6), des moyens de boítier (4), et des moyens de filtration d'air (13), et des moyens de sortie d'air (9) desdits moyens formant boítier (4), caractérisée en ce qu'elle comporte en outre un espace de répartition d'air (7) situé dans lesdits moyens formant boítier (4), délimité par lesdits moyens de filtration d'air (13), les moyens d'introduction d'air (6) pouvant être actionnés pour extraire l'air de l'environnement via lesdits moyens d'entrée d'air (3) jusqu'à l'intérieur dudit espace de répartition d'air (7), et par conséquent à travers lesdits moyens de filtration d'air (13) et à travers lesdits moyens de sortie d'air (9), et la section transversale d'écoulement d'air desdits moyens de filtration (13) est au moins 10 fois plus grande que la section transversale minimale d'écoulement d'air existant au niveau desdits moyens d'entrée d'air (3).
- Combinaison selon la revendication 1, dans laquelle la direction de l'écoulement d'air à travers lesdits moyens de filtration d'air (13) est transversale à la direction de l'air extrait à travers lesdits moyens d'entrée d'air (3).
- Combinaison selon la revendication 1 ou 2, dans laquelle lesdits moyens d'entrée d'air (3) comportent des moyens de paroi continue (2), lesdits moyens de paroi s'étendant vers le haut dudit plateau de table (1).
- Combinaison selon l'une quelconque des revendications 1 à 3, dans laquelle la section transversale d'écoulement d'air des moyens de filtration (13) est au moins 15 fois plus grande que la section transversale d'écoulement d'air des moyens d'entrée d'air (3).
- Combinaison selon la revendication 4, dans laquelle la section transversale d'écoulement d'air des moyens de filtration (13) est au moins 20 fois plus grande que la section transversale d'écoulement d'air des moyens d'entrée d'air (3).
- Combinaison selon l'une quelconque des revendications précédentes, dans laquelle lesdits moyens de filtration d'air (13) comportent une pluralité d'unités filtrantes (8), chacune des unités filtrantes étant située le long d'une partie respective de la périphérie dudit espace de répartition d'air (7) et plusieurs desdites unités (8) fournissant un groupe de dites unités (8), et étant reliées électriquement de sorte que les unités (8) dudit groupe peuvent être actionnées sous forme d'un filtre à air électrique unitaire.
- Combinaison selon la revendication 6, dans laquelle ladite pluralité d'unités filtrantes (8) sont en butée l'une contre l'autre de manière à former une paroi d'unités de filtration sensiblement continue autour de la périphérie dudit espace de répartition d'air (7).
- Combinaison selon l'une quelconque des revendications précédentes, dans laquelle lesdits moyens de filtration d'air (13) sont constitués de moyens de filtration d'air polarisants.
- Combinaison selon l'une quelconque des revendications précédentes, dans laquelle les moyens de filtration d'air (13) sont constitués de moyens de filtration chimiques.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9605115.6A GB9605115D0 (en) | 1996-03-07 | 1996-03-07 | Air treatment |
GB9605115 | 1996-03-07 | ||
PCT/GB1997/000452 WO1997032504A1 (fr) | 1996-03-07 | 1997-02-19 | Traitement de l'air |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0888073A1 EP0888073A1 (fr) | 1999-01-07 |
EP0888073B1 true EP0888073B1 (fr) | 2000-01-05 |
Family
ID=10790196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97903501A Expired - Lifetime EP0888073B1 (fr) | 1996-03-07 | 1997-02-19 | Traitement de l'air |
Country Status (15)
Country | Link |
---|---|
EP (1) | EP0888073B1 (fr) |
JP (1) | JP2000506042A (fr) |
CN (1) | CN1217636A (fr) |
AR (1) | AR006144A1 (fr) |
AT (1) | ATE188353T1 (fr) |
AU (1) | AU714592B2 (fr) |
CA (1) | CA2247934A1 (fr) |
DE (1) | DE69701087T2 (fr) |
ES (1) | ES2141596T3 (fr) |
GB (1) | GB9605115D0 (fr) |
GR (1) | GR3032700T3 (fr) |
ID (1) | ID16767A (fr) |
NZ (1) | NZ331584A (fr) |
PT (1) | PT888073E (fr) |
WO (1) | WO1997032504A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT501345A1 (de) * | 2004-12-30 | 2006-08-15 | Peter Podirsky | Restaurant raucher/nichtraucher lösung |
CN102499527A (zh) * | 2011-10-27 | 2012-06-20 | 常熟市福达红木家具厂 | 一种具有净化二手烟功能的红木餐椅 |
JP7105068B2 (ja) * | 2018-01-31 | 2022-07-22 | 三菱重工業株式会社 | フィルタユニット品質管理システム及びフィルタユニット品質管理方法 |
CN109463905A (zh) * | 2018-11-19 | 2019-03-15 | 曾昭孟 | 一种具有空气智能过滤功能的冷藏热循环可扩展保温桌 |
CN111214908A (zh) * | 2019-11-18 | 2020-06-02 | 赵博韬 | 一种城市规划展台防尘装置 |
IT202000011242A1 (it) * | 2020-05-15 | 2021-11-15 | Pozzolo Enrico Dal | Tavolo con sistema di purificazione dell’aria |
JP7504392B2 (ja) | 2020-08-27 | 2024-06-24 | 株式会社トルネックス | 天板付き家具 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4248162A (en) * | 1979-07-26 | 1981-02-03 | Spellman High Voltage Electronics Corporation | Table with electrostatic air purifier/cleaner |
US4625633A (en) * | 1985-08-20 | 1986-12-02 | Center Core, Inc. | Ventilated core unit for service connections |
US5441279A (en) * | 1994-08-08 | 1995-08-15 | Messina; Gary D. | Smokeless casino gaming table |
-
1996
- 1996-03-07 GB GBGB9605115.6A patent/GB9605115D0/en active Pending
-
1997
- 1997-02-19 EP EP97903501A patent/EP0888073B1/fr not_active Expired - Lifetime
- 1997-02-19 DE DE69701087T patent/DE69701087T2/de not_active Expired - Fee Related
- 1997-02-19 AU AU18046/97A patent/AU714592B2/en not_active Ceased
- 1997-02-19 JP JP9531541A patent/JP2000506042A/ja active Pending
- 1997-02-19 NZ NZ331584A patent/NZ331584A/xx unknown
- 1997-02-19 AT AT97903501T patent/ATE188353T1/de not_active IP Right Cessation
- 1997-02-19 WO PCT/GB1997/000452 patent/WO1997032504A1/fr active IP Right Grant
- 1997-02-19 CA CA002247934A patent/CA2247934A1/fr not_active Abandoned
- 1997-02-19 PT PT97903501T patent/PT888073E/pt unknown
- 1997-02-19 ES ES97903501T patent/ES2141596T3/es not_active Expired - Lifetime
- 1997-02-19 CN CN97194366.4A patent/CN1217636A/zh active Pending
- 1997-03-06 ID IDP970706A patent/ID16767A/id unknown
- 1997-03-07 AR ARP970100915A patent/AR006144A1/es unknown
-
2000
- 2000-02-18 GR GR20000400398T patent/GR3032700T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
NZ331584A (en) | 2000-01-28 |
WO1997032504A1 (fr) | 1997-09-12 |
JP2000506042A (ja) | 2000-05-23 |
EP0888073A1 (fr) | 1999-01-07 |
DE69701087T2 (de) | 2000-09-14 |
GR3032700T3 (en) | 2000-06-30 |
AU1804697A (en) | 1997-09-22 |
GB9605115D0 (en) | 1996-05-08 |
PT888073E (pt) | 2000-06-30 |
DE69701087D1 (de) | 2000-02-10 |
AR006144A1 (es) | 1999-08-11 |
CA2247934A1 (fr) | 1997-09-12 |
CN1217636A (zh) | 1999-05-26 |
ATE188353T1 (de) | 2000-01-15 |
ES2141596T3 (es) | 2000-03-16 |
AU714592B2 (en) | 2000-01-06 |
ID16767A (id) | 1997-11-06 |
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