EP2169322B1 - Convecteur de plafond par induction de courant croisé - Google Patents

Convecteur de plafond par induction de courant croisé Download PDF

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Publication number
EP2169322B1
EP2169322B1 EP09171084.8A EP09171084A EP2169322B1 EP 2169322 B1 EP2169322 B1 EP 2169322B1 EP 09171084 A EP09171084 A EP 09171084A EP 2169322 B1 EP2169322 B1 EP 2169322B1
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EP
European Patent Office
Prior art keywords
ceiling
air
ceiling convector
orifices
convector
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.)
Active
Application number
EP09171084.8A
Other languages
German (de)
English (en)
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EP2169322A1 (fr
Inventor
Jacobus Hubert Joseph Marie Holthuizen
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.)
Inteco BV
Original Assignee
Inteco BV
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Publication date
Application filed by Inteco BV filed Critical Inteco BV
Publication of EP2169322A1 publication Critical patent/EP2169322A1/fr
Application granted granted Critical
Publication of EP2169322B1 publication Critical patent/EP2169322B1/fr
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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
    • 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
    • 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
    • F24F2013/0616—Outlets that have intake openings
    • 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 concerns a ceiling convector for delivering cooled or heated air. More in particular, the ceiling convector uses a cross flow principle as a result of which the efficiency and the cooling and heating capacity of the ceiling convector is enhanced.
  • the principle of climate regulation generally involves an air flow transported through a heat exchanger. This heat exchanger is used to cool down or warm up the air flow. By directing the air flow transported through the heat exchanger into the room, the temperature and humidity of the air in the room can be accurately regulated.
  • An air conditioner generally consists of two units. A separate external unit located outside ensures that the coolant in the heat exchanger is cooled down. The internal unit in the room ensures cooling or heating the air in the room. With other devices consisting only of one single internal unit, the warm and humid air is transported to the outdoors.
  • the present invention concerns a ceiling convector, which can be used as internal unit of an air conditioning system.
  • a ceiling convector is mounted in or at a ceiling of a room and may deliver either cooled or heated air.
  • a ceiling convector usually comprises a housing in which a heat exchanger is mounted for the treatment (cooling or heating) of said air, an outflow opening, as well as driving means for generating a flow of air via the heat exchanger to the outflow opening.
  • the air in the room under the ceiling is sucked in via the heat exchanger, and subsequently delivered in a cooled or heated state.
  • the direction of the air flowing out of the outflow opening can be adapted such that, when cooling the room, the outflowing air sweeps along the ceiling and, as a result of the Coanda-effect, also continues to follow the ceiling over a longer distance. While when heating, the outflowing air may be directed downward.
  • the present invention concerns a ceiling convector as described above, characterized by an improved efficiency and an increased capacity.
  • the ceiling convector of the present invention uses a cross flow of the primary air flows. By allowing the primary air flows to cross each other, the induced air flow which flows through the heat exchanger increases. Because of this, the heat exchanger is exploited more efficiently and the capacity of the ceiling convector is increased.
  • the present invention concerns a ceiling convector used as an internal unit of an air conditioning system.
  • the ceiling convector is mounted in or at a ceiling of a room and may deliver either cooled or heated air and comprises a housing in which an heat exchanger is mounted for treating said air, an outflow opening as well as driving means for generating the flow of air through the outflow opening.
  • the inventors have found that - when the primary air flows are crossed - an improved flow through the heat exchanger is created. Whereas traditional ceiling convectors use parallel or opposite directed primary air flows to suck in the secondary cooled air, the inventors have found that directing towards each other and crossing the air flows offers a number of advantages with respect to the ceiling convectors known in the prior art.
  • the air flows which are expelled by the ceiling convector have an air suction effect that is known as the induction principle.
  • This way a secondary air flow is sucked in from the room by the induction in the ceiling convector.
  • the secondary air flow is transported along a heat exchanger and is either cooled down or heated up, depending on the intended function of the ceiling convector. Subsequently, the cooled or heated secondary air is mixed in the induction area with primary air flows upon which the cooled or heated air is reintroduced into the room.
  • the present invention provides a ceiling convector for delivering cooled or heated air, wherein the ceiling convector makes use of the cross flow induction principle.
  • the ceiling convector has at least two primary air flows directed towards each other or which cross each other, as a result of which an increased secondary air flow is created by induction, which is transported from the room along a heat exchanger and is mixed with the primary air flows. The mixed air flow is subsequently transported into the room.
  • the ceiling convector is characterized by the fact that the primary air flows cross each other at an angle (50) ranging between 10° and 170°.
  • the present invention further provides a ceiling convector for delivering cooled or heated air, according to claim 1.
  • the different elements of the ceiling convector may be comprised in a housing which may be mounted in or at a ceiling of a room.
  • the ceiling convector provides at least, but is not limited to, two outflow openings.
  • the ceiling convector of the present invention provides 2, 3, 4, 6, 8, 10 or more outflow openings.
  • the ceiling convector provides two or four outflow openings.
  • the ceiling convector provides at least, but is not limited to, two opposite orifices.
  • the ceiling convector of the present invention provides 2, 3, 4, 5, 6, 8, 10 or more orifices of which at least 2 opposite orifices are directed towards each other.
  • opposite orifices is meant that at least two orifices are mounted opposite each other such that they may be directed towards each other.
  • the driving means for generating the air flow through the orifices may be configured in a large number of ways, such as with ventilators and the like.
  • the ceiling convector is characterized by two opposite orifices directed towards each and two outflow openings.
  • the ceiling convector according to the present invention provides an overlap of the air flows generated by the opposite orifices, between 0% and 100% at the location where the air flows cross each other, and preferably between 0% and 50%, and more preferably between 0% and 20% at the location where the air flows cross each other. Preferably, there is no overlap between air flows crossing each other.
  • the air flows from said orifices are going to cross each other in an opposite direction. This provides for extra turbulence in the area where the air flows cross each other, which further ensures a better and faster mixing of the primary air flows with the secondary air flows. By this additional effect, the induction effect increases, which provides in itself for an increased capacity of the ceiling convector.
  • the ceiling convector is characterized in that the orifices are grouped in at least, but not limited to, two opposite rows of orifices directed towards each other.
  • Each row comprises at least, but is not limited to, one orifice, preferably two orifices, and most preferably four orifices.
  • a row may comprise 1, 2, 3, 4, 5, 6 and more orifices.
  • the ceiling convector comprises two opposite rows of orifices directed towards each other, wherein the two rows run parallel with each other.
  • the ceiling convector comprises three rows of orifices directed towards each other, wherein the three rows form a triangle.
  • the ceiling convector comprises four rows of orifices directed towards each other, wherein the four rows form a square.
  • the ceiling convector is characterized in that the centre lines of the opposite orifices form an angle (50) between 10° and 170°, preferably ranging between 120° and 170°, preferably ranging between 135° and 160° and in particular preferably ranging between 140° and 150°.
  • the angle (50) at which the primary air flows cross each other preferably is 135°, 136°, 137°, 138°, 139°, 140°, 141°, 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, 150°, 151°, 152°, 153°, 154°, 155°, 156°, 157°, 158°, 159° or 160°.
  • the ceiling convector is characterized in that the opposite orifices are positioned crossed with respect to each other.
  • the opposite orifices are not positioned directly opposite each other, but that the position of the opposite orifices is staggered. Because of this, the air flows which are directed through the opposite orifices, will flows towards each other and will cross each other in an opposite direction. When the opposite orifices are staggered with respect to each other, the air flows will not touch each other, or only partially and consequently not or only partially mix with each other. Crossing ensures that extra turbulence is generated which ensures a faster mixing such that the secondary air flow is better mixed with the primary air flows.
  • Typical for the present invention is that the crossing air flows cover the whole surface of the heat exchanger. This provides an even flow of secondary air over the complete width of the heat exchanger. This increases the effectiveness and hence, also the capacity of the ceiling convector. With existing convectors, the air jets generally do not cover the middle of the heat exchanger as a result of the decentralised positioning of the orifices pointing outwards or downwards. Hence, the middle area of the heat exchanger is hardly used.
  • the ceiling convector is characterized in that at least two opposite orifices extend into a mixing chamber which provide the primary air flow, and wherein the mixing chamber is connected with the outflow side of the heat exchanger which provides the secondary air flow, wherein the mixed air flow leaves the mixing chamber through the outflow opening.
  • the ceiling convector is characterized in that each orifice is positioned opposite an outflow opening.
  • the ceiling convector is characterized in that the ceiling convector comprises controlling means for regulating the position of the regulator based on the temperature of the outflowing air.
  • a regulator With the ceiling convector according to the invention, a regulator is installed which provides the normal Coanda-effect when cooling. The regulator is then inactive. However, when heating, the regulator is adjusted such that a downwards directed flow is obtained. This downwards directed flow breaks up the Coanda-effect, and ensures that the relatively warm air leaving the ceiling convector, is directed downwards. As a result, when heating, the air is transported directly to the workplaces, such that a better temperature distribution is obtained.
  • controlling means are provided for regulating the position of the regulator based on the temperature of the outflowing air.
  • Said controlling means may be configured in all kinds of ways, for example with a temperature sensor in combination with an electric regulator drive.
  • two parallel outflow openings are provided, each with their own regulator, as well as two rows of orifices, each one positioned opposite a respective outflow opening, the heat exchanger being positioned between the outflow openings.
  • the ceiling convector is characterized in that the heat exchanger has a supply side which is in connection with the room.
  • the ceiling convector is characterized in that the ceiling convector comprises a housing which is mounted in or at a ceiling of a room.
  • the ceiling convector is characterized in that the primary air flows in the ceiling convector cross each other at an angle (50) ranging between 10° and 170°, preferably ranging between 120° and 170°, preferably ranging between 135° and 160° and in particular preferably ranging between 140° and 150°.
  • the angle (50) at which the primary air flows cross each other is preferably 135°, 136°, 137°, 138°, 139°, 140°, 141°, 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, 150°, 151°, 152°, 153°, 154°, 155°, 156°, 157°, 158°, 159° or 160°.
  • the present invention also provides a method for providing a room with a ceiling convector according to any of claims 1 -10.
  • the ceiling convector of the present invention Compared to a traditional ceiling convector wherein the primary air flows are not directed towards each other or do not cross each other, with the ceiling convector of the present invention an increased capacity is obtained.
  • the increase of the capacity amounts 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% or more.
  • the ceiling convector (1) shown in Figure 1 and Figure 2 is incorporated in the ceiling (2).
  • the ceiling convector (1) is mounted in the ceiling (2) in a well-known manner.
  • the ceiling convector (1) is mounted in such a way that the lower boundary (1a) of the ceiling convector (1) lies in the same plane as the lower boundary (2a) of the ceiling (2).
  • Such a way of mounting is known per se, and is here not shown further in detail.
  • the ceiling delimits a room (3) the air of which is treated by the ceiling convector (1).
  • the ceiling convector (1) may also be supported by the lowered ceiling (2) or may be suspended independently from the above positioned ceiling or a bridge construction, not further shown.
  • the ceiling convector (1) comprises a profiled separation plate (4) with cap (5) mounted thereon, both defined on the head sides by a head plate (6).
  • the cap (5) at least one ventilation air inflow opening is provided with an air connection (7) connected on the outside.
  • said air connection (7) is positioned at the side, however it may also be positioned at the top of the cap (5).
  • the separation plate (4) is also provided with openings in which aerodynamically formed air inflow orifices (8) are placed.
  • the openings with orifices (8) may be replaced by profiled openings, integrated in the separation plate (4), which have the same inflow function as the orifices (8).
  • the positioning of the orifices (8) in the separation plate (4) is most particular in that the left and right row of orifices are directed towards each other, in contrast to the existing systems wherein they are directed away from each other or are at least minimum parallel to each other. Additionally, the positioning in the longitudinal direction of the separation plate (4) is such that the orifices (8) in the left row are staggered with respect to those in the right row. By this special positioning the so-called cross flow induction principle is obtained.
  • a centrally positioned bottom panel (10) provided with one or more perforations (10a) with such an flow rate that sufficient air from the room (3) may enter the ceiling convector (1).
  • a gap-like air inflow opening (17) On both sides of the bottom panel (10) is located a gap-like air inflow opening (17). It is defined on the outside by the separation plate (4).
  • the bottom panel (10) borders the heat exchanger (9) which forms a battery which it constructed from water-carrying pipes (9a) with perpendicular placed fins thereon (9b).
  • the water-carrying pipes (9a) are connected to a tubing system, not further shown.
  • the action of the ceiling convector (1) is characterized in that by means of a commonly known transport system for conditioned ventilation air, not further shown, air (11) with a certain pressure is transported into the inflow plenum (12) by means of the air connection (7).
  • the inflow plenum (12) is defined by the separation plate (4), cap (5), and head plates (6).
  • air is transported via the orifices (8) into the underlying mixing and induction area (14) in the form of primary air flows (13). Since the total surface of the air flow-orifice is very small, the initial speed of the primary air flows (13) will be relatively high.
  • the air pressure in a free air flow is always lower than in the surrounding nearly static air.
  • the cold or warm air mixture induced by the primary air flows (13) is blown into the room (3) via the gap-like air inflow openings (17).
  • the inflow angle is chosen such that the inflow air (18) is given the opportunity to stick to the ceiling (2) present, the so-called "Coanda-effect".
  • the room (3) is treated evenly without an undesirable cold zone occurring.
  • the room (3) below is suitably cooled or heated and provided with fresh air.
  • Figure 2 pertains to a detailed view of a ceiling convector (1) wherein the heat exchanger (9) and bottom panel (10) have been omitted by way of illustration of the cross flow induction principle.
  • the crossing jets (13) do not, or only partially touch each other. However, the crossing jets (13) cause extra vorticities or turbulence in the area located between the air jets mutually and in the boundary layer (16) of these air jets (13). These vorticities provide a faster mixing of the secondary air flow (15) with the primary air flows (13). Because of this, induction and capacity increase further.
  • the crossing air jets (13) always cover the whole surface of the heat exchanger (9), which results in a very even inflow of secondary air (15) over the entire width of the heat exchanger (9).
  • This increases the effectiveness and as a result, also the capacity.
  • the air jets generally do not cover the middle of the heat exchanger as a consequence of the decentralised positioning of the orifices opening outwards or downstairs. Hence, the middle portion of the heat exchanger is hardly used.
  • the ceiling convector of the present invention may be provided with a smaller and simpler heat exchanger with a smaller heat exchange fin surface and less tubing. As a consequence, the ceiling convector will be smaller and more economical.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Central Air Conditioning (AREA)

Claims (11)

  1. Convecteur de plafond (1) pour délivrer de l'air refroidi ou chauffé, comprenant:
    a. un échangeur de chaleur (9) pour traiter ledit air lié au refroidissement ou au chauffage de celui-ci,
    b. une chambre de mélange (14) comprenant au moins deux ouvertures de d'écoulement (17),
    c. au moins deux orifices opposés (8) dirigés l'un vers l'autre, chacun pour générer un flux d'air primaire vers les ouvertures de sortie (17),
    caractérisé en ce que lesdits flux d'air primaires (13) générés par les orifices opposés (8), dirigés l'un vers l'autre, se croisent dans ladite chambre de mélange (14).
  2. Convecteur de plafond selon la revendication 1, caractérisé en ce que les orifices sont groupés en au moins deux rangées opposées d'orifices orientés l'un vers l'autre.
  3. Convecteur de plafond selon les revendications 1 ou 2, caractérisé en ce que les lignes médianes des orifices opposés (8) forment un angle (50) entre 10° et 170°.
  4. Convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que les orifices opposés (8) sont placés croisés l'un par rapport à l'autre.
  5. Convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que au moins deux orifices opposés (8) s'étendent dans une chambre de mélange (14) fournissant le flux d'air primaire, et dans lequel la chambre de mélange (14) est reliée au côté de sortie de l'échangeur de chaleur (9) qui fournit le flux d'air secondaire, dans lequel le flux d'air mélangé quitte la chambre de mélange (14) à travers l'ouverture de sortie (17).
  6. Convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque orifice (8) est situé face à une ouverture de sortie (17).
  7. Convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que le convecteur de plafond comprend des moyens de commande pour réguler la position du régulateur sur la base de la température de l'air sortant.
  8. Convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que l'échangeur de chaleur (9) a un côté d'alimentation qui est relié à la pièce (3).
  9. Convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que le convecteur de plafond comprend un boîtier (12) qui est monté dans ou au plafond (2) d'une pièce (3).
  10. Convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que les flux d'air primaires dans le convecteur de plafond se croisent selon un angle (50) compris entre 10° et 170°.
  11. Procédé de fourniture d'une pièce avec un convecteur de plafond selon l'une quelconque des revendications précédentes, caractérisé en ce que le flux secondaire d'air (15) de la pièce (3) vers le convecteur de plafond a au moins doublé.
EP09171084.8A 2008-09-24 2009-09-23 Convecteur de plafond par induction de courant croisé Active EP2169322B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2002015A NL2002015C (nl) 2008-09-24 2008-09-24 Kruisstroom inductie plafondconvector.

Publications (2)

Publication Number Publication Date
EP2169322A1 EP2169322A1 (fr) 2010-03-31
EP2169322B1 true EP2169322B1 (fr) 2017-06-07

Family

ID=40785441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09171084.8A Active EP2169322B1 (fr) 2008-09-24 2009-09-23 Convecteur de plafond par induction de courant croisé

Country Status (4)

Country Link
EP (1) EP2169322B1 (fr)
DK (1) DK2169322T3 (fr)
ES (1) ES2637190T3 (fr)
NL (1) NL2002015C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE533440C2 (sv) * 2009-01-26 2010-09-28 Swegon Ab Induktionsapparat för sammanföring av luftflöden
SE535935C2 (sv) * 2011-04-27 2013-02-26 Gert Nimblad Anordning vid ett ventilationsaggregat
GB2492310B (en) * 2011-05-20 2017-03-01 Frenger Systems Ltd Improvements in or relating to air conditioning modules

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE553797A (fr) * 1956-01-13
FR1283789A (fr) * 1961-03-17 1962-02-02 Dell Orto Chieregatti Spa Appareil de conditionnement d'air
DE2502538A1 (de) * 1975-01-23 1976-08-26 Siemens Ag Vorrichtung zum klimatisieren von raeumen unter verwendung der beleuchtungswaerme
JPS5295861A (en) * 1976-02-06 1977-08-11 Nisshin Kogyo Kk Adjustable withdrawal type air conditioning unit
DE8910063U1 (de) * 1989-08-23 1989-10-19 H. Krantz Gmbh & Co, 5100 Aachen Induktivdurchlaß
DE4303307C2 (de) * 1992-07-14 1995-03-30 Schmidt Christel Vorrichtung zur Kühlung von Räumen
JPH0791685A (ja) * 1993-09-22 1995-04-04 Matsushita Seiko Co Ltd 多室型冷暖房装置
NL1004187C2 (nl) * 1996-10-03 1998-04-06 Luchttechnisch Adviesbureau Ev Convector.
DE19826566C2 (de) * 1998-06-15 2003-05-15 Ltg Holding Gmbh Verfahren und Vorrichtung zum Belüften eines Raumes
FI113693B (fi) * 2000-12-07 2004-05-31 Halton Oy Tuloilmalaite
SE527956C2 (sv) * 2004-02-10 2006-07-18 Lindab Ab Anordning vid tilluftsventilation innefattande långsträckt kanal med dysor

Also Published As

Publication number Publication date
ES2637190T3 (es) 2017-10-11
NL2002015C (nl) 2010-03-25
EP2169322A1 (fr) 2010-03-31
DK2169322T3 (en) 2017-08-28

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