EP2339260A1 - Ceiling disperser for conducting supply air into a room by alternating standard and high volume air - Google Patents

Ceiling disperser for conducting supply air into a room by alternating standard and high volume air Download PDF

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Publication number
EP2339260A1
EP2339260A1 EP10397520A EP10397520A EP2339260A1 EP 2339260 A1 EP2339260 A1 EP 2339260A1 EP 10397520 A EP10397520 A EP 10397520A EP 10397520 A EP10397520 A EP 10397520A EP 2339260 A1 EP2339260 A1 EP 2339260A1
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EP
European Patent Office
Prior art keywords
duct part
pipe
supply air
air
room
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.)
Granted
Application number
EP10397520A
Other languages
German (de)
French (fr)
Other versions
EP2339260B1 (en
Inventor
Marjo Lahtimo
Anders Engvall
Jan Risen
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.)
Flaekt Woods AB
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Flaekt Woods AB
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Publication date
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Publication of EP2339260A1 publication Critical patent/EP2339260A1/en
Application granted granted Critical
Publication of EP2339260B1 publication Critical patent/EP2339260B1/en
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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/12—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of sliding members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/755—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for cyclical variation of air flow rate or air velocity
    • 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
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F2007/005—Cyclic ventilation, e.g. alternating air supply volume or reversing flow direction
    • 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 object of this invention is a ceiling disperser for conducting supply air to an inside space of a building, more particularly into a room, wherein the supply air is arranged to flow for most of the time with a certain air volume, which ceiling disperser comprises a duct part, by means of which the ceiling disperser is connected to the supply air duct, a frame part, which surrounds the duct part, and also a front plate, which comprises apertures or nozzles at least at the point of the duct part.
  • the aim of this invention is to apply the concept of a stronger supply air flow occurring intermittently as presented in the aforementioned doctoral thesis.
  • a ceiling disperser that is characterized in that at the point of the duct part a pipe that is smaller in diameter than the duct part is installed partly inside the duct part, which smaller pipe can be moved in the vertical direction between a lower position and an upper position, and in that in its lower position the pipe is essentially against the front plate or near it, in which case the air flow is conducted only via the holes in the front plate that are at the point of the duct part.
  • One preferred embodiment of the ceiling disperser according to the invention is characterized in that in the upper position the pipe is at a distance from the front plate, in which case the air flow is directed also to the sides.
  • a second preferred embodiment of the ceiling disperser according to the invention is characterized in that the vertical movement of the pipe is implemented with a step motor.
  • One advantage of the invention is that with ceiling disperser the distribution of supply air can be implemented in pulses, i.e. at times more air, at times less, at certain regular intervals.
  • the technology presented in the aforementioned doctoral thesis is utilized in the form of a ceiling disperser.
  • the principle of the technology in question is thus that supply air is brought into the inside space of a building, e.g. into a room, which can be e.g. a conference room or corresponding, for a certain time e.g. 15 minutes. After it, considerably more supply air is brought, e.g. for five minutes.
  • a room e.g. a conference room or corresponding
  • a certain time e.g. 15 minutes.
  • the temperature of the room is not cooled any more than before as measured by a thermometer, the persons in the room experience the air pulses as pleasantly cooling, and do not experience the feeling of a draft.
  • the aforementioned duration times of the air flows can be varied, but the basic principle is that the basic flow always lasts longer than the stronger flow.
  • Fig. 1 presents an oblique bottom view of a ceiling disperser, i.e. mainly the front plate 1 is seen in it.
  • the front plate comprises a number of apertures 2 near the outer edges.
  • a group of apertures 3 or nozzles is formed in essentially the center part of the front plate 1.
  • the aperture group is essentially round.
  • the aperture group is, for its part, rectangular in shape.
  • the ceiling disperser comprises a duct part 6, which is connected to the supply air duct (not shown), and via which the supply air is conducted into the ceiling disperser.
  • the ceiling disperser according to the invention also comprises a pipe 7 that is adjustable in the vertical direction, the diameter of which pipe is slightly smaller than that of the duct part 6.
  • the pipe also extends to inside the duct part 6 and, as mentioned, can be moved in the vertical direction between a lower position ( Fig. 3 ) and an upper position. An appreciable gap may not remain between the pipe and the duct part, so that the air does not "escape" from between them.
  • Fig. 4 illustrates in more detail the principle of the invention by means of a sectioned isometric drawing.
  • Supply air flows into the ceiling disperser via the duct part 6.
  • a pipe 7 is fitted inside the duct part, which pipe can thus be moved in the vertical direction.
  • the pipe 7 is in its lower position, i.e. it is essentially against the front plate 1, in which case supply air is forced into the aperture group 3 and via it onwards into the room.
  • supply air pulse is produced, i.e. the flow is aimed directly downwards and considerably more strongly than in the basic operating position of the ceiling disperser, in which the pipe 7 is raised into its upper position (not presented).
  • the ceiling disperser is used for most of the time in this so-called basic operating position, in which the pipe 7 is raised into its upper position, where it is at a distance from the front plate 1.
  • This supply air flow can last e.g. approx. 15 minutes, after which the pipe 7 is lowered down and the air is aimed directly into the apertures 3 and onwards into the room.
  • This phase can last e.g. approx. five minutes. After this, these two phases can be repeated following the same pattern.
  • Fig. 5 presents entirely the same principle as Fig. 4 except that the aperture group 3 is now round in shape, whereas in the situation in Fig. 4 it is rectangular in shape.
  • the aperture group 3 can be formed from a different piece, into which apertures are made, and which is fixed onto the front plate of the ceiling disperser.
  • the pipe 7 that is movable in the vertical direction between two extreme positions and that functions as an adjustment means of the supply air flow is used e.g. with a step motor (not shown).
  • the step motor is in connection with a rotating shaft 8, which via a rotary movement and threads raises and lowers the support means 9 of the pipe and thereby the pipe itself. This is not, however, the only alternative and a person skilled in the art can, according to need, construct a suitable moving mechanism.
  • a front plate of a ceiling disperser which front plate comprises a number of apertures 2 nearer the outer edge. It is also possible that the front plate does not comprise apertures except for the aperture group 3 at the point of the duct part 6. In this case, in the basic operating position of the ceiling disperser the supply air flows from the gap 5 between the front plate 1 and the frame part, and of course also to some extent via the apertures 3. It is further obvious that the shape of the ceiling disperser does not need to be as rectangle, but instead it can also be another shape, e.g. round.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)

Abstract

A ceiling disperser for conducting supply air into an inside space of a building, more particularly into a room, wherein the supply air is arranged to flow for most of the time with a certain air volume, which ceiling disperser comprises a duct part (6), by means of which the ceiling disperser is connected to the supply air duct, a frame part (4), which surrounds the duct part, and also a front plate (1), which comprises apertures or nozzles (3) at least at the point of the duct part. The invention is implemented such that at the point of the duct part (6) a pipe (7) that is smaller in diameter than the duct part is installed partly inside the duct part, which smaller pipe can be moved in the vertical direction between a lower position and an upper position.

Description

  • The object of this invention is a ceiling disperser for conducting supply air to an inside space of a building, more particularly into a room, wherein the supply air is arranged to flow for most of the time with a certain air volume, which ceiling disperser comprises a duct part, by means of which the ceiling disperser is connected to the supply air duct, a frame part, which surrounds the duct part, and also a front plate, which comprises apertures or nozzles at least at the point of the duct part.
  • The ventilation of an inside space of a building, such as a room, more particularly a classroom, an office or a corresponding space, which typically contains numerous people, is challenging. People generate a thermal load, which endeavors to gradually raise the inside temperature of the room. To compensate this, there are in principle two solutions: the room can be cooled mechanically, or more air can be supplied to the room. Mechanical cooling is rather expensive to install and consumes a lot of energy. Additional (uncooled) air flow can, for its part, result in air flow velocities that are too high, which produce discomfort and a continuous draft for those people in the room.
  • Hans Wigö's doctoral thesis "Technique and human perception of intermittent air velocity variation, September 2005, University of Gävle, Sweden" has investigated these problems. The doctoral thesis endeavors to show that it is, in fact, more pleasant for people in a room if momentarily "excess" air flows into the room. This more abundant air flow can last e.g. five minutes, after which a smaller amount of air is brought to the room for e.g. 15 minutes. An abundant air flow for five minutes was experienced as cooling and the feeling of an unpleasant draft was not experienced. The temperature does not in this case need to be mechanically cooled, but instead a sufficiently pleasant indoor air is achieved.
  • The aim of this invention is to apply the concept of a stronger supply air flow occurring intermittently as presented in the aforementioned doctoral thesis. This is achieved with a ceiling disperser that is characterized in that at the point of the duct part a pipe that is smaller in diameter than the duct part is installed partly inside the duct part, which smaller pipe can be moved in the vertical direction between a lower position and an upper position, and in that in its lower position the pipe is essentially against the front plate or near it, in which case the air flow is conducted only via the holes in the front plate that are at the point of the duct part.
  • One preferred embodiment of the ceiling disperser according to the invention is characterized in that in the upper position the pipe is at a distance from the front plate, in which case the air flow is directed also to the sides.
  • A second preferred embodiment of the ceiling disperser according to the invention is characterized in that the vertical movement of the pipe is implemented with a step motor.
  • One advantage of the invention is that with ceiling disperser the distribution of supply air can be implemented in pulses, i.e. at times more air, at times less, at certain regular intervals.
  • In the following, the invention will be described in more detail by the aid of some preferred embodiments with reference to the attached drawings, wherein
    • Fig. 1 presents an oblique bottom view of a ceiling disperser according to one embodiment of the invention.
    • Fig. 2 presents an oblique bottom view of a ceiling disperser according to a second embodiment of the invention.
    • Fig. 3 presents a side view of a ceiling disperser according to the invention.
    • Fig. 4 presents an oblique top view of a partially sectioned ceiling disperser according to one embodiment of the invention.
    • Fig. 5 presents an oblique top view of a partially sectioned ceiling disperser according to a second embodiment of the invention.
  • In the invention the technology presented in the aforementioned doctoral thesis is utilized in the form of a ceiling disperser. The principle of the technology in question is thus that supply air is brought into the inside space of a building, e.g. into a room, which can be e.g. a conference room or corresponding, for a certain time e.g. 15 minutes. After it, considerably more supply air is brought, e.g. for five minutes. Although the temperature of the room is not cooled any more than before as measured by a thermometer, the persons in the room experience the air pulses as pleasantly cooling, and do not experience the feeling of a draft. The aforementioned duration times of the air flows can be varied, but the basic principle is that the basic flow always lasts longer than the stronger flow.
  • Fig. 1 presents an oblique bottom view of a ceiling disperser, i.e. mainly the front plate 1 is seen in it. The front plate comprises a number of apertures 2 near the outer edges. In addition a group of apertures 3 or nozzles is formed in essentially the center part of the front plate 1. In this embodiment the aperture group is essentially round. In the embodiment of Fig. 2 the aperture group is, for its part, rectangular in shape.
  • It is observed from Fig. 3 that there is a gap 5 between the front plate 1 and the frame part 4. This gap can be adjusted e.g. to two different dimensions according to need.
  • In addition, it is observed from Fig. 3 that the ceiling disperser comprises a duct part 6, which is connected to the supply air duct (not shown), and via which the supply air is conducted into the ceiling disperser. The ceiling disperser according to the invention also comprises a pipe 7 that is adjustable in the vertical direction, the diameter of which pipe is slightly smaller than that of the duct part 6. The pipe also extends to inside the duct part 6 and, as mentioned, can be moved in the vertical direction between a lower position (Fig. 3) and an upper position. An appreciable gap may not remain between the pipe and the duct part, so that the air does not "escape" from between them.
  • Fig. 4 illustrates in more detail the principle of the invention by means of a sectioned isometric drawing. Supply air flows into the ceiling disperser via the duct part 6. A pipe 7 is fitted inside the duct part, which pipe can thus be moved in the vertical direction. In the situation of Fig. 4 the pipe 7 is in its lower position, i.e. it is essentially against the front plate 1, in which case supply air is forced into the aperture group 3 and via it onwards into the room. With this a so-called "supply air pulse" is produced, i.e. the flow is aimed directly downwards and considerably more strongly than in the basic operating position of the ceiling disperser, in which the pipe 7 is raised into its upper position (not presented). When the pipe 7 is in its upper position, supply air is able to flow immediately after the duct part also in the lateral direction, in which case it comes into the room considerably more evenly.
  • The ceiling disperser is used for most of the time in this so-called basic operating position, in which the pipe 7 is raised into its upper position, where it is at a distance from the front plate 1. This supply air flow can last e.g. approx. 15 minutes, after which the pipe 7 is lowered down and the air is aimed directly into the apertures 3 and onwards into the room. This phase can last e.g. approx. five minutes. After this, these two phases can be repeated following the same pattern.
  • Fig. 5 presents entirely the same principle as Fig. 4 except that the aperture group 3 is now round in shape, whereas in the situation in Fig. 4 it is rectangular in shape. The aperture group 3 can be formed from a different piece, into which apertures are made, and which is fixed onto the front plate of the ceiling disperser.
  • The pipe 7 that is movable in the vertical direction between two extreme positions and that functions as an adjustment means of the supply air flow is used e.g. with a step motor (not shown). The step motor is in connection with a rotating shaft 8, which via a rotary movement and threads raises and lowers the support means 9 of the pipe and thereby the pipe itself. This is not, however, the only alternative and a person skilled in the art can, according to need, construct a suitable moving mechanism.
  • It is obvious to the person skilled in the art that the invention is not limited to the embodiments presented above, but that it can be varied within the scope of the claims presented below. Described above is a front plate of a ceiling disperser, which front plate comprises a number of apertures 2 nearer the outer edge. It is also possible that the front plate does not comprise apertures except for the aperture group 3 at the point of the duct part 6. In this case, in the basic operating position of the ceiling disperser the supply air flows from the gap 5 between the front plate 1 and the frame part, and of course also to some extent via the apertures 3. It is further obvious that the shape of the ceiling disperser does not need to be as rectangle, but instead it can also be another shape, e.g. round.

Claims (3)

  1. A ceiling disperser for conducting supply air to an inside space of a building, more particularly into a room, wherein the supply air is arranged to flow for most of the time with a certain air volume, which ceiling disperser comprises a duct part (6), by means of which the ceiling disperser is connected to the supply air duct, a frame part (4), which surrounds the duct part, and also a front plate (1), which comprises apertures or nozzles (3) at least at the point of the duct part, characterized in that at the point of the duct part (6) a pipe (7) that is smaller in diameter than the duct part is installed partly inside the duct part, which smaller pipe can be moved in the vertical direction between a lower position and an upper position, and in that in its lower position the pipe (7) is essentially against the front plate (1) or near it, in which case the air flow is conducted essentially only via the apertures (3) in the front plate that are at the point of the duct part.
  2. Apparatus according to claim 1, characterized in that in the upper position the pipe (7) is at a distance from the front plate (1), in which case the air flow is directed also to the sides.
  3. Apparatus according to claim 1 or 2, characterized in that the vertical movement of the pipe (7) is implemented with a step motor.
EP10397520A 2009-12-16 2010-11-10 Ceiling disperser for conducting supply air into a room by alternating standard and high volume air Active EP2339260B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20096337A FI123114B (en) 2009-12-16 2009-12-16 Roof diffuser to direct supply air to an interior space

Publications (2)

Publication Number Publication Date
EP2339260A1 true EP2339260A1 (en) 2011-06-29
EP2339260B1 EP2339260B1 (en) 2013-03-27

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Family Applications (1)

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EP10397520A Active EP2339260B1 (en) 2009-12-16 2010-11-10 Ceiling disperser for conducting supply air into a room by alternating standard and high volume air

Country Status (3)

Country Link
EP (1) EP2339260B1 (en)
DK (1) DK2339260T3 (en)
FI (1) FI123114B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2860467A1 (en) * 2013-10-11 2015-04-15 Caverion Deutschland GmbH Air outlet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847017B1 (en) * 1978-10-28 1979-11-08 Schako Metallwarenfabrik Supply air outlet for the ceiling of rooms to be ventilated and air-conditioned
GB2155170A (en) * 1984-03-05 1985-09-18 Waterloo Grille Company Limite Adjustable ventilators

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847017B1 (en) * 1978-10-28 1979-11-08 Schako Metallwarenfabrik Supply air outlet for the ceiling of rooms to be ventilated and air-conditioned
GB2155170A (en) * 1984-03-05 1985-09-18 Waterloo Grille Company Limite Adjustable ventilators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HANS WIGO, TECHNIQUE AND HUMAN PERCEPTION OF INTERMITTENT AIR VELOCITY VARIATION, September 2005 (2005-09-01)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2860467A1 (en) * 2013-10-11 2015-04-15 Caverion Deutschland GmbH Air outlet

Also Published As

Publication number Publication date
EP2339260B1 (en) 2013-03-27
FI20096337A (en) 2011-06-17
FI20096337A0 (en) 2009-12-16
FI123114B (en) 2012-11-15
DK2339260T3 (en) 2013-06-24

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