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
  • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
  • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air

Definitions

• the present invention relates to an air distribution device of the kind set forth in the preamble of Claim 1.
• the inventive air distributing device is a low impulse device and can either be built into or attached to a wall or like struc ⁇ ture or may stand freely on a floor or like support surface.
• the device is located close to the floor and consequently the speed of the incoming air must be low, in order not to create draughts or other disturbing phenomena.
• Previously knownair distributing devices of this kind are encum ⁇ bered with a number of drawbacks.
• the construction of the device is often unnecessarily complicated, which results in high manu ⁇ facturing costs and time consumption, and also in high repair and maintenance costs.
• the exiting air flow is of ⁇ ten not controlled satisfactorily, especially in the horizontal plane, which results in uneven ventilation in the room in which the device is placed.
• previously known air distri ⁇ bution devices suffer from high pressure of the incoming air in connection with small apertures in the distribution and/or partition surfaces of the device. Such small apertures become sooner or later clogged with impurities rendering a smaller flow of air and thus a non-desired mode of operation of the device.
• Regular cleaning and/or exchange of parts of the device will of ⁇ ten be unavoidable.
• FR A 2 169 131 discloses a device without induction of secondary or room air, but with not less than three different perforated walls, through the small perforations of which the air has to be fed out under high pressure and thus entailing the draw-backs as mentioned before.
• US A 1 523 268 discloses an air distribution system for ceilings, which system also lacks induction of secondary or room air, and
• the object of this invention to provide an improved air distribution device in which the aforesaid drawbacks are substantially avoided, which is of simple construction, which will control the incoming air satisfactorily in both the vertical and horizontal directions, which incurs low manufactu- ring costs and repair and maintenance costs, and which represents a general step forward in this art.
• the invention aims also at saving energy and costs by making it possible to use less pri ⁇ mary or ventilation air in the first hand and lower temperature of same in the second hand compared with previously knowndevices. It is also an object of the invention to provide a better spread of the ventilation air, and to avoid the necessity of regular inspection, cleaning and/or exchange of parts of the device.
• the device according to the invention requires a relatively low speed of the through flowing-air and ensures uniform ventilation of a major range surrounding the ' device.
• Secondary air is continuously sucked into the device, mixed therein with the primary air and fed out in a mixed and condi ⁇ tioned state.
• the secondary air has higher temperature than the primary air, which accordingly brings about a mixture of temperatures and allows thus lower tempera- tures of the primary air without a lower temperature of the di ⁇ stributed air mixture compared with a device without induction and other essential features according to this invention.
• costs for the air distribution and the apparatus crea ⁇ ting same may be kept down, as smaller dimensions and lower tem- peratures maybe applied. Even costs of operation maybe reduced, as minor fans or minor efficiency of same will be required.
• SUBSTITUTESHEET The device operates entirely without hydraulic, pneumatic or electric means, which often are sensitive to break-downs and have a limited life time.
• a distribu ⁇ ting and throttling plate exhibiting through-flow zones with in- termediate imperforate or constricted induction zones on the downstream side of the plate allowing induction of secondary or room air, " is a surprisingly simple and efficient means for achieving partly an advantageous induction and partly contribu ⁇ ting to the new and advantageous combined mode of operation of the device according to the invention.
• Figure 1 is a partially cut-away perspective view of a first embodiment of the invention
• Figure 2 is a cross-sectional view taken on the line B in Fig. 1 and shows the device mounted in a wall structure;
• Figure 3 illustrates an air distributing and throttling plate located at A in Figure 2;
• Figure A is a horizontal view of the air distribution device taken on the line C in Figure 1;
• Figure 5 is a partially cut-away perspective view of a second embodiment of the invention.
• Figure 6 is an axial section of the air distribution device of
• Figure 7 is a horizontal section taken on the line E in Fig. 6 and shows guide rails and baffle and support plates included in the inventive device;
• Figure 8 illustrates a second embodiment of an air distributing and throttling plate located at D in Figure 6;
• Figure 9 is a partially cut-away perspective view of a third embodiment of the invention.
• Figure 10 is a partially cut-away side elevational view accor- ding to line F./.F in Figure 11;
• Figure 11 is a partially cut-away top plan view of the device
• Figure 12 is a partially cut-away perspective view of a fourth embodiment of the invention.
• Figure 13 is a top plan view of the device according to Fig. 12 without upper wall;
• Figure 14 illustrates in an expanded view the mode of assembling guide rails and support plates according to Figures 12 and 13;
• Figure 15 is a partially cut-away perspective view of a fifth embodiment of the invention.
• Figure 16 is a partially cut-away front-view of the device accor ⁇ ding to Figure 15;
• Figure 17 is a view according to line K./.K in Figure 16.
• FIGS 1-4 illustrate a first embodiment of an inventive air distribution device 10 which is intended for mounting at or in a wall or like structure, e.g. a stud wall 1, indicated in chain lines in Figure 2, at a short distance above a floor surface 2.
• the device 10 is flat and includes an inlet sleeve 12 which ex ⁇ tends to a distribution chamber 14 bounded by a rear wall 16, side walls 18, a bottom wall 20, and an upper wall 22 which is contiguous with the inlet sleeve.
• the distribution chamber 14 is covered on the side thereof facing the room to be ventilated with a perforated front cover plate 24 which has located centrally and
• a distribution or screening plate 25 contribu- ting to desired lateral diversion of a part of the outgoing air flow.
• the rails 26 are carried by the side walls 18 or preferably, as shown, by vertical baffle and support plates 30 which are preferably inclined to the vertical so as to diverge in the direction of the outgoing air flow, and which are located on respective sides of the distribution plate 25 and have an out ⁇ wardly angled part 31 at a location nearest the front plate 24.
• the baffle and support plates 30 and preferably also the guide rails 26 are provided with slots by means of which the plates
• S U BSTITUTESHEET and rails can be brought into mutual locking relationship.
• the plates 30 and/or the rails 26 may be arranged tiltable to allow modified setting.
• an air distributing and throttling plate 32 Arranged between the inlet sleeve 12 and the distribution cham ⁇ ber, or box, 14 is an air distributing and throttling plate 32, which is perforated with holes 34.
• the holes are disposed in a rear row 35 and mutually parallell rows 36 said rows enclo ⁇ sing intermediate imperforate induction zones 38 which open to- ward the front side of the device.
• induction air is drawn by suction into the induction zones on the downstream side of the distribution plate 32, from a secondary air aperture or port 42 directed to ⁇ wards the front side of the device.
• the secondary air aperture is bounded laterally by the side walls 18, upwards by the upper wall 22 and/or and upper boundary plate 44, and downwards by a lower boundary plate 46.
• This secondary air port may be screened-off, e.g. by a displaceable co-planar or co-curved perforated plate, mesh or the like (not shown), when a reduced amount of secondary air or return air is to be taken from the ventilated room.
• This latter plate and plate 25 may also be combined to allow simultaneous setting of both areas in any desired way.
• the front plate 24 is located at a distance from the wall 1 such as to leave an intermediate gap or slot 48.
• the plate 24 has at each end thereof a rearwardly bent side edge portion 50 which carries an inwardly turned flange or lip 52.
• Both the bent side-edge portions 50 and their respective corners joining the front plate and also the lips 52 have perforations 54 similar to the front plate. This avoids the occurrence of non-uniformly directed and sharply defined air exit zones on both the front side of the device and externally of the gap or slot 48.
• the holes 54 in the side-edge portions 50 and their respective corners assist in equilizing the gas or air flow in this region and also prevent the occurance of stagnation zones. Tho rpntral 1
• SUBSTITUTESHEET located air distribution plate 25 is effective in throttling the air flow in the central region of the front plate.
• This air throttling effect together with the guiding effect afforded by the baffle and support plates 30, with their outwardly angled parts 31, assist in delivering air to regions which lie immediately in front of and laterally of the inventive air distribution device.
• Air entering the device (arrow 56) from a conduit (not shown) is slowed down in the inlet sleeve 12 by the air distributing and throttling plate 32 and flows uniformly distributed down through the rear rows of holes 35, along the rear wall 16 of the distribution chamber and through the mutually parallel rows of holes 36.
• a subpressure is generated on the underside of the plate 32 in the impcrforate zones 38 and induction air is drawn into these zones in the aforedescribed manner.
• part air-flows are successively directed forwardly by the rails 26.
• the upwardly bent parts 28 of the rails 26 will therewith act as "splitters” and split off that part of the incoming air flow located nearest the front side of the device.
• the rear wall 16 is inclined and hence the chamber 1 narrows downwardly, so that the air will flow at essen ⁇ tially the same speed throughout the whole length of the chamber and air flows of equal size will be deflected or guided outwards through the front cover plate by the guide rails.
• a wall-mounted air distribution device constructed in accordance with the invention is typically adapted for fitting to studwor in which the vertical studs arc spaced 70 mm apart.
• the inlet sleeve is given con- veniently a size of 60 x ca 500 so as to utilize all the space available between the studs.
• the device itself has a typical width of 600 mm and a height of 300-900 mm depending
• the diameter of the holes in the distribution plate 32 ranges from 8 to 16 mm, depend ⁇ ing on the air requirement concerned.
• the front cover plate may suitably have a hole diameter of 5 mm with a centre distance of 7.5 mm.
• the device 10 is suitably placed at a distance of 10 cm from the floor.
• Figures 5-8 illustrate another embodiment of the inventive device, referenced 110, which is intended to be placed freely on a floor or like support surface.
• Components which are similar or identical to corresponding components of the Figures 1-4 embodiment have been identified with the same reference signs, although with the addition of a prefix 1 (one) .
• the exemplifying device 110 illustrated in Figures 5-8 includes an inlet sleeve 112 which extends to a distribution chamber 114 which is bounded at the bottom by a bottom plate 120 and at the top by a top cover 122.
• the device is supported on a floor base 123 and comprises an encircling cylindrical, vertical front cover which is perforated with holes 154 for the passage of ventilation air.
• Located within the front, cover is a number of annular, horizontally oriented guide rails 126, the radially inner edge of each of which is bent upwardly around the centre hole 129 of the annulus , to form an upstanding collar 128.
• the annular rails 126 arc carried by a plurality of vertical baffle and support plates 130 which arc at least three in number, preferably four or more.
• the central hole of the annular guide rails 129 decreases in size with increasing depth and distance from the inlet sleeve 112, thereby to form a downwardly narrowing distribution chamber.
• the guide rails 126 and/or the vertical support plates 130 also in this case include slots by means of which the rails can be attached securely and reliably kept in position.
• the plates 130 function to support the annular guide rails 126 and also
• baffle and support plates 130 are provided. This may be the case, for instance, when the air distribution device 10 is intended to deliver ventilation only around a part of its circumference, while the remain ⁇ der of the circumference is screened off by a screening plate (not shown) located in the immediate vicinity of the perforated front cover plate 124.
• the plates 130 are preferably located along the edges of such a screening plate.
• the horizontal part of respec ⁇ tive rails 126, and preferably also the collars 128 thereon, may be perforated with holes having a diameter of, e.g., 2 mm. These holes allow a certain amount of air to pass through the guide rail surfaces and guide rail collars. This prevents the occurrence of subpressure zones on the underside of the guide rails and/or on the o.utside of the collars, in which zones back currents and turbulence may occur and there ⁇ with result in acoustic and flow disturbances in the flow exiting from the air distribution device.
• the inlet sleeve 112 connects with an inlet box or chamber 131, the bottom of which is delimited by a distributing and throttling plate 132.
• the plate 132 has provided therein a plurality of through-passing holes 134 which arc disposed in radially extending rows with intermediate inductions zones 138 which open outwardly towards the periphery of the device. Extending circumfcrcntially around the device
• a secondary air port 142 which is bounded at the top by an upper plate 144 (which also serves as the outer wall of the inlet box 131) and at the bottom by a bottom plate 146.
• an upper plate 144 which also serves as the outer wall of the inlet box 131
• a bottom plate 146 there is engendered on the undcrsida
• SUBSTITUTE SHEET flows or currents 140 arc drawn, through the secondary air ports 142.
• This suction of secondary air into the ventilation device may also be effected through the ejector effect crea ⁇ ted as a result of the speed at which the primary air flows 5 into the device.
• a free-standing air distribution device constructed in accordance with the invention need not necessarily be cylindrical, but may have any desired configuration.
• the device may be triangular, square, rectangular or any other polygonal and/or irregular shape.
• the ver ⁇ tical baffle and support plates 330 are, however, preferably arranged to support the entire central structure.
• two support plates 330 are preferably joined together with a guide rail 326 as shown in Figure 14, where the plates 30 are pro- vided with centrally matching slots, meanwhile each guide rail forms around a central rectangular opening upwardly curved edges 328 leaving free recesses between one another to retain the support plates.
• the size of the central opening of the support rails decreases from top to bottom.
• the fifth embodiment as shown in Figures 15-17 discloses a device of elongated semi-circular shape in cross-section.
• the interior of this device constitutes roughly a mirror-symmetrical combination of two devices according to Figures 9-11.
• the cen ⁇ tral part of the front-edges and the latteral edges of the guide rails are preferably bent upwards or downwards to form flanges for attachment to the adjacent walls, respectively the distribu- tion plates of the device.
• these plates may preferably be combined with the guide rails, so that these parts may form a unit, preferably in combination with possible baffles or the like, which unit quickly and easily can be removed and installed.
• SUBSTITUTESHEET facilitate equalization of pressure of the outflowing air mixture, which thus is distributed into a room as uniformly as possible.
• this may, of course, be replaced by guide plates of downwardly increasing size as is the case with the fully circular embodiments.
• the flow-free zones may be replaced with flow arms between the holes 36, 136, which may also have any desired form or configuration.
• the plates 32, 132 may be replaced with other elements of a desired kind.
• the guide rails also may be de ⁇ signed in one piece with the supporting structure, i.e. the lateral limitations, which may be support plates or baffles, namely by punching said guide rails out of a metal sheet.
• the supporting structure may be left to extend co-planar or co-cur ⁇ ved with the front cover or may be bent to extend at any de ⁇ sired angle in relation to same.
• such a unit may also be made of plastic material, preferably by means of injection moulding.

Landscapes

• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Air-Flow Control Members (AREA)
• Duct Arrangements (AREA)
• Nozzles (AREA)
• Catching Or Destruction (AREA)
• Separation By Low-Temperature Treatments (AREA)
• Compressor (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Telephone Function (AREA)
• Respiratory Apparatuses And Protective Means (AREA)
• Ventilation (AREA)
• Manufacture, Treatment Of Glass Fibers (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=20369986

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (13)

Family Cites Families (10)

• 1987
  • 1987-10-22 SE SE8704133A patent/SE8704133L/xx not_active Application Discontinuation
• 1988
  • 1988-10-24 DE DE88909397T patent/DE3879507T2/de not_active Expired - Fee Related
  • 1988-10-24 AU AU26027/88A patent/AU2602788A/en not_active Abandoned
  • 1988-10-24 JP JP63508657A patent/JP2647478B2/ja not_active Expired - Lifetime
  • 1988-10-24 AT AT88909397T patent/ATE87082T1/de active
  • 1988-10-24 EP EP88909397A patent/EP0389508B1/de not_active Expired - Lifetime
  • 1988-10-24 WO PCT/SE1988/000559 patent/WO1989003961A1/en active IP Right Grant
• 1990
  • 1990-04-17 DK DK095090A patent/DK95090D0/da not_active Application Discontinuation
  • 1990-04-19 FI FI901952A patent/FI94670C/fi not_active IP Right Cessation
  • 1990-04-20 NO NO901748A patent/NO168137C/no not_active IP Right Cessation

Non-Patent Citations (1)

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