EP0617241A1 - Plafond refroidi - Google Patents

Plafond refroidi Download PDF

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Publication number
EP0617241A1
EP0617241A1 EP94101867A EP94101867A EP0617241A1 EP 0617241 A1 EP0617241 A1 EP 0617241A1 EP 94101867 A EP94101867 A EP 94101867A EP 94101867 A EP94101867 A EP 94101867A EP 0617241 A1 EP0617241 A1 EP 0617241A1
Authority
EP
European Patent Office
Prior art keywords
air
distribution chamber
inflow
air guide
openings
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Withdrawn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
EP94101867A
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German (de)
English (en)
Inventor
Wolfgang Radtke
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.)
Schmidt Reuter Ingenieurgesellschaft Mbh & Partner KG
Original Assignee
Schmidt Reuter Ingenieurgesellschaft Mbh & Partner KG
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 Schmidt Reuter Ingenieurgesellschaft Mbh & Partner KG filed Critical Schmidt Reuter Ingenieurgesellschaft Mbh & Partner KG
Publication of EP0617241A1 publication Critical patent/EP0617241A1/fr
Withdrawn legal-status Critical Current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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0089—Systems using radiation from walls or panels

Definitions

  • the invention relates to an air-cooled chilled ceiling for rooms in buildings in order to dissipate excess heat from these rooms.
  • a chilled ceiling of the type specified in the preamble of claim 1 is known from DE 40 15 665 C2.
  • longitudinal supply air ducts are provided, which are connected to the distribution chambers arranged underneath.
  • the cold air flows from the distribution chambers into the air ducts of the cooling ceiling, which have displacement air outlets at the opposite ends through which the air enters the room.
  • the cold air from the supply air duct reaches the distribution chambers through outlet openings.
  • These outlet openings are alternately directed obliquely in opposite directions, so that one of the outlet openings directs the air into the right adjacent air guidance space, while the adjacent outlet opening Air directs air into the adjacent left air duct.
  • the outlet openings of the distribution chambers are directed obliquely downwards, so that the cold air is directed directly towards areas of the ceiling panels. If the air in the room is damp, condensation can form on these ceiling panels, which are cooled with cold air. On the other hand, there are other areas of the ceiling that heat up and from which the heat is inadequately dissipated because only a little cold air gets to these places. This applies in particular if there are two supply air ducts on the ceiling, between which no source outlet is provided. The standing air heats up in such areas.
  • a ventilation ceiling is known, from which fresh air flows into the room below.
  • the fresh air is supplied to the ceiling via an air intake duct and introduced into air duct spaces that extend under the supply air duct to opposite sides.
  • the fresh air which can also be used for air conditioning, flows out of air outlets which are provided at the ends of the air guidance spaces.
  • the walls delimiting the air ducts to the room to be air-conditioned are provided with an insulating layer.
  • the air conditioning is primarily carried out by mixing the fresh air with the room air inside the room to be cooled. This can lead to turbulence. In the surface area of the ceiling there is no effective room cooling due to the heat-insulating layer that delimits the air duct spaces.
  • DE-OS 19 41 819 describes a suspended false ceiling, in the cavity of which air-permeable rails are arranged which support the suspended ceiling.
  • the rails allow a continuous air flow in the ceiling cavity. Depending on the proximity to the air inlet, this results in different warm or cold ceiling areas.
  • CH 672 833 A5 describes a method for room air conditioning in which fresh air is supplied to the ceiling area, which heats up and flows into the room in a laminar manner near the wall in an isothermal manner.
  • the ceiling contains a pipe system that acts as a heat exchanger. If the air in the room is humid, condensation can form on the pipe system and on the cooling ceiling.
  • the invention has for its object to provide a chilled ceiling in which the risk of condensation is reduced and in which there is a uniform temperature distribution over the entire ceiling area.
  • the distribution chamber is a mixing chamber into which the cold supply air from the supply air duct enters through injection nozzles.
  • the distribution chamber which contains warmer air than the supply air duct, communicates with the downstream flow opening with an opposite air guide space, from which warmer secondary air is sucked in by the cold air jet by induction.
  • This secondary air is mixed with the cold air, and in the air duct to which the injection nozzle is directed, an air mixture enters which is warmer than the cold air.
  • cooling air is introduced into the one air guide space through the injection nozzles, while at the same time warmer air is extracted from the opposite air guide space.
  • the injection nozzles are directed fully into the inflow openings of the air guidance spaces. It is thereby achieved that the air mixture does not flow directly against the outer wall parts of the cooling ceiling, but rather runs freely into the air guiding space serving as the inflow space. On the one hand, this has the effect that the induction jet extends far into the inflow space and ensures an intensive flow there, and on the other hand that wall contacts of the jet mixture are avoided in the area of the inflow opening.
  • the narrowed inflow opening creates a second induction effect in the air guiding space which acts as the inflow space, by means of which warmer air is sucked into the mixture jet and the air in the air guiding space is kept in constant motion.
  • the distribution chambers running below the supply air duct can be individually isolated from one another by partitions, so that in a distribution chamber the access openings into the adjacent inflow space are always arranged only on one side and the inflow openings from the adjacent inflow space are only arranged on the other side of the mixing chamber.
  • the invention is applicable not only to a chilled ceiling which has air outlets in all fields on the side facing away from the supply air duct, but also to chilled ceilings which have central fields without air outlets. In such central fields, the air is kept in constant motion and thus a constant exchange of air causes the result that the central fields assume a temperature that is significantly below room temperature.
  • a cooling ceiling 10 which runs between the window front 11 and a corridor wall 12 of a building, the space being delimited by side walls 13.
  • the cooling ceiling 10 consists of three fields 10a, 10b, 10c extending between the walls 11 and 12.
  • Each of these fields 10a, 10b, 10c consists of panels 14 arranged side by side, which run in the transverse direction.
  • Source air outlets 17 are provided along the longitudinal room walls 13, from which the air used for cooling the ceiling emerges into the room.
  • the middle field 10b of the chilled ceiling 10 does not have such air outlets.
  • Fig. 2 shows the internal structure of the cooling ceiling 10.
  • Above the longitudinal plate 15 is an air supply duct 20, which with cold air of z. 14 ° C is supplied.
  • a duct profile 21 is fastened under the supply air duct 20 and delimits a plurality of distributor chambers 22 which are arranged one behind the other under the supply air duct 20.
  • the distributor chambers 22 are partitioned off from one another by transverse dividing walls 23.
  • the lower limit of the channel profile 21 or the distribution chamber 22 is formed by the plate 15 which closes the lower opening of the channel profile 21.
  • each supply air chamber 25 is connected to the supply air duct 20 via openings 26.
  • the supply air chamber 25 of FIG. 2 has lateral outlet openings 28 in the form of injection nozzles, from which the cold air exits into the distribution chamber 22.
  • the injection nozzles are designed so that the outlet speed is relatively high (over 1.0 m / s).
  • the cold air emerging from the outlet openings 28 draws air from the distribution chamber 22 by induction.
  • the outlet opening 28 is fully directed to an inflow opening 29 which is formed in the wall of the adjacent air guide space 30.
  • This air guide space 30 forms the inflow space into which the air mixture flows.
  • the inflow air leaves the air guide space 30 on the opposite side through the displacement air outlet 17 (FIG. 1).
  • the side of the distribution chamber 22 facing away from the outlet opening 28 is connected to the opposite air guiding space 31, which is part of the ceiling panel 10c and forms an afterflow space.
  • the air guide space 31 is connected to the right side of the distribution chamber 22 via inflow openings 32.
  • the air guide spaces 30 and 31, which are closed at the bottom by the panels 14, form the actual cooling spaces of the cooling ceiling 10. Their width is considerably greater than that of the distribution chamber 22.
  • the air guide spaces 30 and 31, which are closed at the bottom by the panels 14 are, consist of boxes 33 which are supported with their lateral ends on the channel profiles 21 or on (not shown) supports.
  • the box profiles form independently assembled units the size of the panels 14.
  • the panels 14 are perforated, so that a small proportion of the air introduced into the air guiding spaces can sink down through the panels 14 into the room.
  • the distributor chamber 22 and the supply air chamber 25 are formed symmetrically to the vertical longitudinal center plane, only the outlet opening 28 being arranged on a vertical side wall of the supply air chamber 25, while the opposite side wall is closed.
  • the inflow opening 29 and the inflow opening 32 are arranged symmetrically to one another.
  • the cold air in the supply air duct 20 has a temperature of 14 ° C.
  • the room temperature is between 22 ° C and 27 ° C.
  • the air in the air guide spaces 30 and 31 is heated to approximately 18 ° C. through the panels 14. This air from the air guide space 31 is sucked into the distribution chamber 22 and mixes there with the air flowing through the outlet opening 28, the air mixture assuming a temperature of 17 ° C.
  • the inflow opening 29 has a larger width than the outlet opening 28. Nevertheless, it narrows the entire air flow, so that it also has an induction effect on the warmer air already contained in the air guide space 30, which is entrained thereby.
  • Fig. 3 shows a view into the air duct 31, which has no displacement air outlet, with the corresponding panel 14 being removed.
  • the air guide space 31 is delimited on both sides by a distributor bar which has a plurality of distributor chambers 22 arranged one behind the other.
  • the width of a panel 14 extends over the length of two distribution chambers 22, which are separated from one another by a partition 23.
  • the outlet openings 28 are directed to the right, that is to say in the direction of the air guide space 31.
  • the outlet openings (not visible in FIG. 2) are directed to the left, that is to say in the direction of the air guide space 30.
  • air mixtures enter the air guide space 31 from the inflow openings 29.
  • the cold primary air coming from the supply air duct 20 is identified by a hollow arrow and the secondary air drawn in by the primary air is indicated by a full arrow.
  • the resulting air mixtures are shown as mixed solid and hollow arrows in accordance with their proportion of primary air and secondary air.
  • inflow openings 29 are arranged across the width of a panel 14 and lead from the front distribution chamber 22a into the air guide space 31.
  • inflow openings 32 are arranged on the same side, which lead out of the air guide space 31 into the distribution chamber 22b.
  • inflow openings 32 are arranged opposite the inflow openings 29 on the left side, and four inflow openings 29 are arranged opposite the inflow openings 32 on the left side. It can be seen that the air mixtures emerging from the inflow openings on the left side are sucked in through the inflow openings 32 on the right side, so that the air mixtures pass through the air guide space 31. In the rear area, this is reversed: the air mixtures emerging from the inflow openings 29 on the right are sucked up by the inflow openings 32 on the left. In the central region of the air guide space 31, the air mixtures emanating from the inflow openings 29 are deflected in part and sucked into the adjacent inflow openings on the same side, so that a swirl zone is created here.
  • FIG. 3 the air conditions are only shown in the air duct 31.
  • Each distribution chamber 22 is also connected to an air guidance space 30 facing away from the air guidance space 31, the inflow openings 29 and the inflow openings 32 being arranged opposite one another, as shown in FIG. 2.
  • FIG. 1 The flow conditions are also shown in FIG. 1.
  • the air mixtures blown into the air guide spaces 30, 31 by the distributor chambers 22 are shown as double arrows and the air flows sucked into the distributor chambers 22 as single arrows.
  • Each double arrow and each simple arrow in FIG. 1 are assigned a total of four inflow openings 29 and post-flow openings 32 in FIG. 3.
  • Fig. 4 shows the constructive design of the supply air chambers 25 lying one behind the other in a common molded part 24 which, for example, consists of a thermoformed rigid film material made of plastic.
  • This molded part 24 has a flat surface 40 which is placed against the underside of the upper wall of the channel profile 21.
  • the surface 40 contains depressions, each of which forms an air supply chamber 25.
  • the supply air chamber 25 narrows towards the lateral outlet opening 28, so that the outlet opening 28 forms an injection nozzle.
  • the four outlet openings 28 face one side (to the right) and the four outlet openings 28 of the adjoining supply air chambers 25 face the opposite side (to the left).
  • the molded part 24 can be arranged in a single distributor chamber 22, which is not divided by a partition is. However, there is also the possibility of providing a partition wall which separates the region of the distribution chamber in which the outlet openings 28 are directed to the right from the region in which the outlet openings are directed to the left.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
EP94101867A 1993-03-22 1994-02-08 Plafond refroidi Withdrawn EP0617241A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934308969 DE4308969C1 (de) 1993-03-22 1993-03-22 Kühldecke
DE4308969 1993-03-22

Publications (1)

Publication Number Publication Date
EP0617241A1 true EP0617241A1 (fr) 1994-09-28

Family

ID=6483322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101867A Withdrawn EP0617241A1 (fr) 1993-03-22 1994-02-08 Plafond refroidi

Country Status (2)

Country Link
EP (1) EP0617241A1 (fr)
DE (1) DE4308969C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026027A1 (fr) * 1997-10-31 1999-05-27 Abb Miljø As Procede et dispositif d'apport d'air de refroidissement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10128381C1 (de) * 2001-06-06 2003-01-09 Ltg Ag Einrichtung und Verfahren zum Heizen und/oder Kühlen eines Raumes
DE102014009633A1 (de) 2014-06-27 2015-12-31 Schmid Janutin Ag Verfahren und Vorrichtung zur Belüftung und Temperierung von Räumen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2109107A (en) * 1981-11-06 1983-05-25 Sulzer Ag Method of and apparatus of individually cooling a plurality of rooms
DE4015665A1 (de) * 1990-05-16 1991-11-21 Schmidt Reuter Klimasystem fuer mehrraumgebaeude

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1679598A1 (de) * 1967-04-29 1971-04-22 Velox Werk Schnelle Herbert Deckenplatte mit Belueftungskammern
DE1941819A1 (de) * 1969-08-16 1971-04-29 Schmidt Helmut Dr Verfahren und Einrichtung zum Klimatisieren und Belueften von Raeumen
CH672833A5 (fr) * 1986-09-30 1989-12-29 Barcol Air

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2109107A (en) * 1981-11-06 1983-05-25 Sulzer Ag Method of and apparatus of individually cooling a plurality of rooms
DE4015665A1 (de) * 1990-05-16 1991-11-21 Schmidt Reuter Klimasystem fuer mehrraumgebaeude

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026027A1 (fr) * 1997-10-31 1999-05-27 Abb Miljø As Procede et dispositif d'apport d'air de refroidissement

Also Published As

Publication number Publication date
DE4308969C1 (de) 1994-07-28

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