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
  • F24F8/108—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
  • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
  • F24F13/02—Ducting arrangements
  • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
  • F24F13/078—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser combined with lighting fixtures
• • 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
  • F24F13/20—Casings or covers
• • 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
  • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
  • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
  • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
• • 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
• • 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
  • F24F2221/02—Details or features not otherwise provided for combined with lighting fixtures
• • 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
  • F24F2221/14—Details or features not otherwise provided for mounted on the ceiling

Definitions

• the present invention relates to a light fitting in the form of a casing which comprises a frame portion de ⁇ fining an opening to a cavity in the casing and which has one or more sockets adapted to receive exchangeable light- producing members, especially fluorescent tubes, inside the cavity, said fitting comprising at least one air fil- ter for cleaning the air conducted therethrough.
• DE-A-2,428,568 discloses a light fitting of this type, in which the filter consists of a layer of filter medium fitted into the lower edge of an annular slit form- ed between an outer and an inner screen which together en ⁇ close and define the inner cavity of the fitting. It is not apparent from this specification whether the filter medium layer is exchangeable or not, but because of its position mounting and dismounting said layer would clearly require much time and effort. Summary of the invention
• the object of the present invention is to make it possible to exchange, in a simple and a convenient manner, the filter or filters used in said fitting.
• the filter is a tube with at least one air-permeable wall, and that one o more connectors are provided inside the casing on the in ⁇ ner side of the frame portion for connecting one or more filter tubes which, like the light-producing members, are mounted inside said cavity.
• the filter tubes are easily accessible and can be exchanged in same manner as the fluorescent tubes or lamps in the fitting, a procedure with which the user usually is well acquainted.
• FIG. 1 is a perspective view of a fitting according to the invention, seen obliquely from below
• FIG. 2 is a cross-section of the fitting according to the invention
• FIG. 3 is a part sectional top plan view of the fitting
• FIG. 4 is a longitudinal cross-section of an alternative embodiment of the fitting according to the inven ⁇ tion.
• a preferred embodiment of the in ⁇ vention is a preferred embodiment of the in ⁇ vention.
• the fitting shown in the drawings has the form of a casing which in its entirety is designated 1 and which, in the embodiment shown in Figs. 1-3, comprises a frame por ⁇ tion generally designated 2 and a bottom generally desig ⁇ nated 3. Together with the bottom 3, the frame portion 2, which in the embodiment in Figs. 1-3 is rectangular, de- fines a cavity 4 which has a downwardly facing opening 5. Both the frame portion 2 and the bottom 3 have interior and exterior walls 6, 7 and 8, 9, respectively. Together with a flat, frame-shaped wall 10, these interior and ex ⁇ terior walls 6, 7, 8 and 9 define a gap 11 common to both the frame portion and the bottom.
• Sockets 12 are disposed adjacent to the interior walls 6' forming the end walls of the cavity 4 and are adapted to receive light-producing members in the form of fluorescent tubes 13.
• both the sockets 12 and the fluorescent tubes 13 may be entirely conventional.
• holes 14 are arranged in the end walls 6' and serve to connect filter tubes 15.
• each end wall 6' comprises two holes, so that two filter tubes can be inserted in the cavity 4.
• the filter tubes 15 may ad- vantageously be of the type described in SE 8505171-2 and comprising a cylindrical, air-permeable wall consisting of creased and stiff paper. The tube is open at its two oppo- site ends, and strips 16 are attached to each of the tube openings and extend into the tube.
• the centre axes of the holes 14 adapted to receive the filter tubes 15 are locat- ed farther inwardly from the opening 5 of the frame por ⁇ tion than are the sockets 12 for the fluorescent tubes 13.
• the centre axes of the sockets 12 are situated in a plane separate from that of the centre axes of the holes 14.
• a screen, in its entirety designated 17 and separating the fluorescent tubes from the filter tubes, is arranged in the area between the holes 14 adapted to receive the filter tubes and the sockets 12 for the fluorescent tubes.
• the sockets are situated in the centre of the cavity, while the holes 14 are situated near to the long side edges of the cavity, such that the filter tubes will be located beside the screen for the fluorescent tubes.
• the screen 17 has the form of a downwardly open trough, the opening of which may be co ⁇ vered by a conventional grating 18 for light fittings.
• the opening 5 to the filter tubes 15 may also advantageously be covered by a grating 19 concealing the filter tubes.
• the filter tubes 15 serve as air supply devices for supplying cleaned supply air to the room where the fitting is mounted.
• an air supply line 20 runs to the fitting and is connected with an inlet 21 in the exterior wall 9 of the bottom 3.
• inlets 21' arranged in the exterior wall of the frame portion 2, as indicated by dash-dot lines in the Figures.
• the air blown into the gap 11 through the line 20 is distributed in said gap and enters into the filter tubes 15 through the opposite openings thereof, whereupon it is filtered through the walls of the filter tube, such that the air, when entering the room where the fitting is mounted, is free from contaminating particles, such as dust, grime and the like, of the type found in air enter ⁇ ing, for instance, a room facing a busy street.
• the screen 17 shown in Fig. 2 is made of a wall impermeable to air, it is also possible to use a per ⁇ forated screen allowing air to pass into the space defined by said screen and circulate round the fluorescent tubes 13, so that no dust will adhere to and be burnt by said tubes.
• particle-free air from the filter tubes 15 is circulated round the fluorescent tubes also if the screen is dispensed with.
• the filter tubes in the fitting may, of course, also serve as air exhaust devices for evacuating spent air from the room below.
• FIG. 4 illustrates an embodiment serving as air exhaust device in which the cavity 4' of the casing 1' is, by means of two partitions 22, 22' , divided into three cham ⁇ bers 23, 24 and 25, the first of which contains one single filter tube 15' .
• the chamber 23 containing the filter tube 15' is covered from one end to another by an air-permeable plate 26, air-permeable gratings 27 being arranged at the openings to the cavities 24, 25.
• one or more fluorescent tubes 13' are intended to be mounted in separate partitioned-off spaces in the casing, on both sides of the chambers 23-25 which are in line with one another.
• the filter tubes 15 may be mount ⁇ ed and held in a very simple manner, in that their end walls are provided with flexible sealing rings, e.g. of rubber, which are compressed when the filter tube is in ⁇ serted from below, between the two opposite end walls 6' , such that said rings are sealingly applied against the end walls.
• flexible sealing rings e.g. of rubber
• the invention is not re ⁇ stricted to the embodiment described above and shown in the drawings.
• the fitting may be adapted for other light- producing elements than fluorescent tubes, e.g. light bulbs, and the number of light-producing members therein may vary considerably.
• the number of fil ⁇ ter tubes may vary materially within the scope of the in ⁇ vention.
• other filter tubes than those open at its opposite ends may naturally be used. As is apparent from Fig.
• the embodiment shown is adapted to be countersunk in a ceiling or in a wall.
• the fitting may also be arranged on the outside, such that the bottom or the frame portion is applied against the ceiling or the wall.
• the geometrical shape of the casing need not be rectangular, but may for instance just as well be circular, polygonal or triangular.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Optical Filters (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20375248

Family Applications (1)

Country Status (9)

Families Citing this family (3)

Family Cites Families (7)

• 1989
  • 1989-03-06 SE SE8900776A patent/SE468105B/sv not_active IP Right Cessation
• 1990
  • 1990-03-01 EP EP90904965A patent/EP0477179A1/de not_active Ceased
  • 1990-03-01 JP JP2504770A patent/JPH04506129A/ja active Pending
  • 1990-03-01 WO PCT/SE1990/000141 patent/WO1990010830A1/en not_active Application Discontinuation
  • 1990-03-01 CA CA002047701A patent/CA2047701A1/en not_active Abandoned
  • 1990-03-01 AU AU52862/90A patent/AU633553B2/en not_active Expired - Fee Related
• 1991
  • 1991-09-05 NO NO91913485A patent/NO913485L/no unknown
  • 1991-09-05 FI FI914197A patent/FI914197A0/fi not_active Application Discontinuation
  • 1991-09-06 KR KR1019910701052A patent/KR920701763A/ko not_active Application Discontinuation

Non-Patent Citations (1)

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