Classifications

• • 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
  • F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
• • 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
  • F24F13/24—Means for preventing or suppressing noise

Definitions

• the present invention concerns an intake air means, as defined in the preamble to Claim 1.
• intake air means comprising a chamber with vertical columnar configuration and of which the cylindrical outer shell is perforated. The air is introduced in the intake air means through an entry port on the upper end of the chamber, and it is conducted further from the chamber into the air-conditioned space, through said outer shell.
• the problem with existing means is that in the intake air means that have been disclosed difficulties are encountered when the intake air should be directed outward from the outer shell uniformly and with low velocity. Such directing implies additional structures, such as a plurality of walls provided with holes, guid- ing members, and/or closing the holes in the outer sur ⁇ face in that direction where no air flow is wanted. In addition, attenuation mats are used in the intervals between walls, in order to reduce the noise level of the intake air means.
• the aim of the invention is, among other things, to eliminate the drawbacks cited above, and to achieve significant simplification of the structural design of the intake air means. This is achieved with the aid of those characteristic features of the inven- tion which are presented in the first claim.
• the intake air means of the invention compris ⁇ es an intake air chamber, a shell component provided at least in part with holes, and an intake connector for introducing air in the intake air chamber, the air being distributed through the perforation of the shell component, from the intake air chamber to an indoor space.
• the shell component is fashioned of comparatively light, and sound-damping material sheet; and the diameters of the holes in said material sheet are not more than twice the thickness of the material sheet.
• the material sheet is formed of cellular or foamed plastic material, advantageously of polystyrene, polyester, polyvinylchloride or equivalent.
• the material sheet is formed of cellular or foamed rubber.
• the material sheet is fixed to a frame-like body structure which is accommodated within the intake air chamber.
• the advantages of the intake air means of the invention include: simple construction of the shell component, at the same time serving to equalize the pressure and to direct the air flow very uniformly into the space that is being ventilated, as well as effi ⁇ ciently damping the noise associated with ventilation. It is furthermore an advantage that servicing and main ⁇ tenance of the intake air means is facilitated, owing to simple construction.
• Fig. 1 presents, schematically and viewed obliquely from above, an intake air means according to the inven- tion;
• Fig. 2 presents a horizontal section of the intake air means of Fig. 1;
• Fig. 3 presents an enlarged sectional view of part of the shell of the intake air means of Fig. 1.
• the intake air means depicted in Fig. 1 com ⁇ prises an intake air chamber 2, which is encircled by a cylindrical shell component 3.
• the shell component 3 is in this embodiment provided with holes 4 on all sides.
• the aggregate surface area of the holes 4, related to the surface area of the shell component 3, is advan ⁇ tageously within 10 to 25% but may be up to 50%.
• the intake air means 1 further comprises an intake connec ⁇ tor 5 and connects with an air duct 7 of the ventila ⁇ tion system through the intake port 6 associated with this connector. Air is introduced through the duct 7 of said system and through the intake connector 5, into the intake air chamber 2, from where air is further distributed through the holes 4 of the shell component into the indoor space.
• This material sheet is shaped of comparatively light, self-supporting and sound-deadening material sheet.
• This material sheet is formed of foamed plastic or rubber material. It may be cellular or foamed plastic or rubber.
• Sheet material of this kind is flexible, whereby it is comparatively con ⁇ venient to be shaped from a rectangular sheet blank to become the curved, and particularly cylindrical, com ⁇ ponent of the intake air means of Fig. 1.
• the thickness of such sheet material is advantageously on the order of 10 mm at least, in which case the shell component 3 does not necessarily require any coherent supporting structure: it retains the shape in which it has been set, by its own inherent rigidity.
• the diameters d of the holes 4 in the sheet of the shell component 3 are at a maximum twice the thickness s of the sheet.
• the holes 4 are then elon ⁇ gated and serve efficiently to direct the air flow fed into the intake air chamber through its upper part, outward at right angles from the shell component 3.
• the output flow from the intake air means 1 is therefore uniform and coherent in all directions.
• the expedient of increasing the diame ⁇ ter d of the holes 4 also increases the thickness s of the shell component.
• the shell component 3 of the intake air means 1, or the material sheet, is attached to a frame-like body structure 8 which is fitted into the intake air chamber 2.
• the body structure 9 comprises two straight supports 8a,8b parallelling the shell component 3, a first flange part 8c, on which the intake connector 5 is disposed, and a second flange part 8d, with the aid of which the bottom part 8d of the intake air chamber 2 has been formed.
• the second flange part 8d is a solid disk.
• the material sheet con ⁇ stituting the shell component 3 is disposed around the frame-like body component 8 and secured to the end flanges 8c,8d.
• the shell component 3 is fixed to the body component 8, for instance by means of a fixing element 10 longitudinal to the means and to the support 8a , this fixing element being an elongated plate. This is preferably secured to the support 8a with the aid of screws.
• the shell component 3 of the intake air means 1 does not necessarily need any continuous, rigid supporting plate.
• the shell component is rigid enough in itself to retain its shape on the body component 8. It is however possible, when required, to provide on the outside sur ⁇ face of the intake air means, or adjacent thereto, a thin protective plate 11 (interrupted lines in Fig. 2) consisting e.g. of metal and covering the shell compo ⁇ nent totally or in part. This plate may be similarly perforated as the shell component 3.
• the purpose with this protective plate is to prevent damage to the intake air means through external agents, e.g people bumping against it, in case the intake air means has been mounted in the space to be ventilated and within the reach of humans in the room, such as close to floor level.
• the protective plate also aims to give the architect free hands in designing the scenery in the space that is being ventilated.
• the appearance and shape of said protective plate can be freely varied without causing any detriment to the function of the intake air means, particularly when the amount of per ⁇ foration is greater than that of the shell component.
• the invention is not exclusively delimited to concern the embodiment example presented in the fore ⁇ going: numerous modifications are feasible within the scope of the inventive idea defined by the Claims.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Duct Arrangements (AREA)
• Reverberation, Karaoke And Other Acoustics (AREA)
• Surgical Instruments (AREA)
• Mechanical Treatment Of Semiconductor (AREA)
• Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
• Glass Compositions (AREA)
• Gas Separation By Absorption (AREA)
• Percussion Or Vibration Massage (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8531497

Family Applications (1)

Country Status (6)

Cited By (2)

Citations (4)

Family Cites Families (1)

• 1990
  • 1990-11-30 FI FI905911A patent/FI94905C/fi not_active IP Right Cessation
• 1991
  • 1991-11-29 WO PCT/FI1991/000366 patent/WO1992009855A1/en active IP Right Grant
  • 1991-11-29 AT AT92900849T patent/ATE134262T1/de not_active IP Right Cessation
  • 1991-11-29 DK DK92900849.8T patent/DK0558618T3/da active
  • 1991-11-29 EP EP92900849A patent/EP0558618B1/de not_active Expired - Lifetime
  • 1991-11-29 DE DE69117192T patent/DE69117192D1/de not_active Expired - Lifetime

Patent Citations (4)

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