EP2933575A1 - Vorrichtung zur luftverteilung mit verdrängereinsätzen, und heizlüfter, der eine solche vorrichtung umfasst - Google Patents

Vorrichtung zur luftverteilung mit verdrängereinsätzen, und heizlüfter, der eine solche vorrichtung umfasst Download PDF

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Publication number
EP2933575A1
EP2933575A1 EP15163641.2A EP15163641A EP2933575A1 EP 2933575 A1 EP2933575 A1 EP 2933575A1 EP 15163641 A EP15163641 A EP 15163641A EP 2933575 A1 EP2933575 A1 EP 2933575A1
Authority
EP
European Patent Office
Prior art keywords
air
insert
fan coil
grid
inserts
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
EP15163641.2A
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English (en)
French (fr)
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EP2933575B1 (de
Inventor
Pierre Jean Vialle
Eric Leroy
Amina Meslem
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.)
Carrier Corp
Original Assignee
Compagnie Industrielle dApplications Thermiques SA CIAT
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Application filed by Compagnie Industrielle dApplications Thermiques SA CIAT filed Critical Compagnie Industrielle dApplications Thermiques SA CIAT
Publication of EP2933575A1 publication Critical patent/EP2933575A1/de
Application granted granted Critical
Publication of EP2933575B1 publication Critical patent/EP2933575B1/de
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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
    • F24F13/26—Arrangements for air-circulation by means of induction, e.g. by fluid coupling or thermal effect
    • 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
    • F24F2221/28—Details or features not otherwise provided for using the Coanda effect

Definitions

  • the invention relates to an air diffusion device having lobed inserts and a fan coil comprising such a device.
  • fan coil units In the field of ventilation, it is known to equip the buildings of ceiling or wall mounted fan coil units to condition and possibly renew the ambient air.
  • the fan coils are distributed throughout the building and each include at least one diffusion device, such as a grill, which distributes conditioned air in the building rooms.
  • diffusion devices such as a grill
  • Room air is drawn in and treated in the fan coil before being ejected into the room. So depending on the needs, heating or cooling, the air is either heated or cooled by the fan coil.
  • the fan coil can also receive fresh air, drawn directly outside or brought by an auxiliary ventilation system. In this case, the outside air is conditioned in the fan coil with air in the room. In cooling mode, the air blown by the fan coil is cooler than the air in the room. It tends to drop to the ground especially as the difference of its temperature with the ambient temperature is important.
  • US-B-6,004,204 discloses an air blast nozzle designed to promote this induction phenomenon.
  • This nozzle is housed in a mixing chamber of an air conditioning unit and optimizes the mixing between a fresh air stream or treated, and a stale air flow extracted from the room.
  • blowing nozzles may be distributed in the width direction of the mixing chamber or a single elongated blow nozzle may be used. This or these nozzles have the particularity of having a trailing edge having a circumference with curves, that is to say having rounded portions.
  • the lobes are arranged in a circle or rectangle.
  • Fan-convectors with a mixing chamber are not suitable for rooms with a large volume since they do not allow to debit air "mixed" sufficient room conditioning.
  • the fact of providing a mixing chamber in the fan coil reduces the compactness of the apparatus.
  • DE-A-1,579,906 discloses an air conditioning device comprising a radiant panel in the form of a corrugated sheet metal plate and two baffles disposed on either side of the plate.
  • the device comprises a plurality of nozzles arranged to distribute air in ducts defined between the radiant panel and a first deflector. Part of the air is then discharged at the longitudinal end of the panel in conduits defined between the panel and the second deflector.
  • the radiant panel allows a particular flow of air within the device, but is not configured to separate an air gap to form a particular external flow promoting mixing with the ambient air.
  • the invention intends to remedy more particularly by providing a diffusion device comprising one or more lobed inserts, which promotes induction, that is to say the mixing of the jet diffused with the air ambient, without the jet losing its reach.
  • the invention relates to a device for diffusing an air jet, comprising at least one insert, which comprises separation lobes, in two differently oriented flows, of an air flow ejected through the device. of diffusion, these lobes delimiting a thin and wavy trailing edge.
  • the device further comprises at least two deflectors disposed on either side of the insert, which define between them an orifice for passage of the air jet around the insert and which guide the jet of air in a predetermined direction.
  • the air flow expelled by the device is separated by the lobes of the insert and the contact surface between the blast air jet and the ambient air is multiplied.
  • the exchange surface between the blown jet and the ambient air is greater than for a blown air jet block.
  • the shearing of the primary fluid by the corrugated trailing edge generates additional longitudinal vortices. These two phenomena increase the mixing of the blown air with the ambient air. This mixture makes it possible to homogenise the temperature of the jet compared to that of the ambient air and the users do not feel the sensation of a cold or hot draft.
  • the baffles direct the jet of air in the predetermined direction, which allows to spread the jet along a wall and enjoy the Coanda effect. The air jet therefore retains a satisfactory range, which prevents the air "falling" too quickly towards users.
  • the invention also relates to a fan coil comprising a diffusion device as described above.
  • a diffusion device 1 which is a grid.
  • the grid 1 is shown from the inside of the room.
  • the grid 1 is adapted to be installed in the upper part of a wall, that is to say near the ceiling.
  • This grid 1 is intended to blow the treated air in a room of a building, that is to say it is a simple flow grid.
  • the grid 1 can be mounted on a fan coil housed in a wall or directly at the end of a duct connected upstream to a fan coil. In the latter case, the grid 1 is a static transmitter and the associated fan coil upstream can diffuse air through several transmitters distributed in the building.
  • the ventilation grid 1 comprises a rectangular frame 2, which is partially shown in FIG. figure 1 and a series of fins 8, which are arranged horizontally in the frame 2 one above the other.
  • the fins 8 are deflectors which direct the air blown through the ventilation grille 1 in a predetermined direction ⁇ , which is turned towards the ceiling. Indeed, as visible at the figure 1 the fins 8 have a bent shape, with a horizontal upstream portion 8a and a downstream portion 8b directed in the direction ⁇ , that is to say upwards.
  • the air blown through the ventilation grid 1 is directed towards the ceiling of the room and takes advantage of the effect "Coanda", which improves the range of the jet.
  • Inserts 10 are arranged between each pair of two adjacent fins 8.
  • the fins 8 thus define between them O10 orifices for passage of the jet of air around the inserts 10.
  • the frame 2 and the fins 8 are partially shown in length for clarity of the drawing.
  • the inserts 10 are attached to two vertical posts 4 and 6 of the frame 2.
  • the inserts 10 have the function of increasing the induction of the air jets passing between the fins 8 of the grid 1.
  • the inserts 10 are arranged slightly in upstream relative to the fins 8 in the flow path of air blown through the grid 1, so that the air blown through the grid 1 is generally directed towards the ceiling and takes advantage of the Coanda effect.
  • the insert 10 extends along a longitudinal axis X10, which is a horizontal direction when the insert is mounted in the ventilation grille 1.
  • the insert 10 comprises two hooks 100 and 102 for attachment to the bars 4 and 6 of the the gate 1.
  • the insert 10 comprises lobes 108 and 110 which are arranged alternately one after the other along the axis X10, that is to say that the lobes 108 and 110 are arranged in line right, or on a segment.
  • the lobes 108 and 110 are rounded portions of the insert 10 which are respectively disposed above and below a median plane P10 of the insert 10.
  • the lobes 108 and 110 each have a concavity turned towards the median plane P10 .
  • the lobes 108 and 110 define a regular and undulating serration along the axis X10. They delimit a trailing edge 106 which is a thin, undulating edge. We are talking about a "lobed" edge.
  • the ripples of the trailing edge 106 are identical and the trailing edge 106 has a thickness e106 constant over the entire length of the insert 10.
  • the thickness e106 is of the order of 1 mm, while the length of the insert 10, which depends on the dimensions of the grid 1, is between 40 and 100 cm.
  • the trailing edge 106 comprises rounded portions 106a and 106b which are respectively disposed above and below the median plane P10.
  • the rounded portions 106a and 106b have an identical radius of curvature and extend over approximately 180 °.
  • the radius of curvature of the portions 106a and 106b is between 1 mm and 10 mm, in particular of the order of 2 mm.
  • the portions 106a and 106b are connected successively to one another by rectilinear portions 106c, which are perpendicular to the median plane P10 and substantially vertical in the installed configuration of the insert 10 in the grid 1.
  • the insert 10 also comprises a leading edge 104, which is rectilinear and extends parallel to the longitudinal axis X10.
  • the plane P10 is a generally horizontal plane in the installed configuration of the grid 1 in the wall. This plane P10 passes through the leading edge 104 and the middle of the rectilinear portions 106c.
  • the air is routed from a ventilation unit to grid 1.
  • the flow of air from the ventilation unit and opening into the grid 1 is symbolized by two arrows F1.
  • the air blown through the grid 1 is cooled or preheated according to the type of packaging selected, that is to say, air conditioning or heating.
  • the air blown through the grid 1 has a large temperature difference with respect to the ambient air.
  • the lobes 108 and 110 each delimit a passage channel of the air flow.
  • the flow of air F1 entering the grid 1 is divided, or separated, by the lobes 108 and 110 of the insert 10.
  • F2 and F3 respectively designate the flow of air flow along the inner wall of the lobes 108 and 110.
  • the "inner" side of the lobes 106 and 108 is defined as the side facing the median plane P10.
  • the air flow F2 in the channels of the lobes 108 are directed upwards while the airflow F3 flows in the channels of the lobes 110 are directed downwards, which allows to separate in two the jet of air ejected through the grid 1.
  • the inserts 10 thus improve the induction of the jet blown through the grid 1, which reduces the temperature difference between the jet blown and the ambient air by about 20%.
  • the jet of air blown through the grid is slowed down by induction because of interactions with the surrounding air, which is why the geometry of the insert 10 actually promotes induction over a short distance, between 5 and 10 cm at the outlet of the grid 1.
  • the speed of the jet is only slightly impacted and the jet retains a satisfactory range.
  • a range of 4 to 5 m is satisfactory since it generally makes it possible to reach an opposite wall of a room in which the grid 1 is installed. In this way, in air conditioning mode, the air does not "fall" too quickly towards the floor with a temperature too cold.
  • this type of insert can also be integrated into a ceiling fan coil 3, shown in FIGS. figures 6 and 8 which is adapted to be housed in a false ceiling 5 of a room.
  • This type of apparatus is commonly referred to as a "diffusion cassette" and has a diffusion slot 30 through which air is blown in a horizontal plane near the ceiling.
  • This diffusion slot is delimited between a plate 322 of a parallelepiped box and a diffuser 34.
  • the diffuser panel 34 is disposed below the box 32.
  • the diffuser panel 34 and the plate 322 are deflectors which guide the air jet blown by the fan coil 3 in a predetermined direction ⁇ .
  • the direction ⁇ is a horizontal direction so that the air diffused by the fan coil 3 "licks" the ceiling.
  • the slot 30 forms a passage opening of the air jet around several inserts 10.
  • the inserts 10 extend along each side of the slot 30.
  • the inserts 10, the diffuser panel 34 and the plate 322 thus form together a diffusion device 1 of the fan coil 3.
  • the diffusion slot 30 is a rectangular peripheral slot.
  • the diffusion slot 30 is U-shaped.
  • figure 6 , F4 and F5 designate two directions of diffusion of an air jet.
  • the inserts 10 are fixed on the upper surface of the panel 34. They comprise fixing lugs 101, which are screwed to the panel 34.
  • the inserts 10 may comprise fastening means for securing them to one another. It is also possible to make a monobloc insert having a U-shaped or rectangular shape depending on the type of cassette used.
  • the grid 1 can be mounted on the ceiling.
  • FIG. 9 and 10 On the Figures 9 and 10 is shown an alternative construction of an insert 10 '.
  • This insert 10 ' is intended to be integrated in a ceiling fan coil as described above. It is partially represented in length on Figures 9 and 10 . It comprises three tabs 101 for fixing to the panel 34 and delimits inclined lobes 110 '. Indeed, unlike lobes 110 of the insert of Figures 1 to 8 , which extend perpendicularly to the longitudinal axis X10 of the insert 10, the lobes 110 'form with an axis Y10 normal to the axis X10 an angle A110 of between -60 ° and + 60 °, in the example equal to 20 °.
  • This angle is measured between the axis Y10 and a direction D110 along which the lobes 110 'extend.
  • the inserts 10 are then able to orient the air jets diffused on the three or on the four sides of the cassette in a mean direction inclined with respect to the directions F4 and F5 which are perpendicular to the sides of the diffuser panel 34.
  • the average direction air jets diffused on the sides of the cassette is thus oriented by the inserts 10 in the diffusion plane of the fan coil 3, which is a horizontal plane. This makes it possible to avoid frontal interaction of the air jets emitted by two cassettes disposed opposite each other and consequently the formation of a cold or hot current resulting from this interaction.
  • the insert 10 also comprises two edges 114 bevelled, that is to say cut at 45 ° with respect to the axis X10 or Y10. This allows four inserts 10 'end to end to form a rectangular frame.
  • the ceiling fan coil 3 comprises means for orienting the inserts 10 in a horizontal plane.
  • these means may comprise a movable support serving as a pivot for orienting the inserts 10 over a range of angles ranging from -60 ° to + 60 ° with respect to an axis normal to one side of the panel 34.

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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)
  • Air-Flow Control Members (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15163641.2A 2014-04-17 2015-04-15 Vorrichtung zur luftverteilung mit verdrängereinsätzen, und heizlüfter, der eine solche vorrichtung umfasst Active EP2933575B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1453487A FR3020132B1 (fr) 2014-04-17 2014-04-17 Dispositif de diffusion avec inserts lobes et ventilo-convecteur comprenant un tel dispositif

Publications (2)

Publication Number Publication Date
EP2933575A1 true EP2933575A1 (de) 2015-10-21
EP2933575B1 EP2933575B1 (de) 2018-12-05

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EP15163641.2A Active EP2933575B1 (de) 2014-04-17 2015-04-15 Vorrichtung zur luftverteilung mit verdrängereinsätzen, und heizlüfter, der eine solche vorrichtung umfasst

Country Status (3)

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EP (1) EP2933575B1 (de)
FR (1) FR3020132B1 (de)
RU (1) RU2675715C2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU205662U1 (ru) * 2021-05-21 2021-07-27 Общество с ограниченной ответственностью «СПН-Полимер» Гибкая вентиляционная вставка

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962952A (en) * 1957-03-01 1960-12-06 Carrier Corp Air conditioning unit
DE1579906A1 (de) 1965-07-02 1970-09-24 Haelg & Co Einrichtung zur Strahlungsheizung bzw.-kuehlung
US5230656A (en) * 1992-08-05 1993-07-27 Carrier Corporation Mixer ejector flow distributor
US6004204A (en) 1995-03-10 1999-12-21 Luminis Pty Ltd. Induction nozzle and arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1138611A1 (ru) * 1983-07-11 1985-02-07 Специальный Проектно-Конструкторский Институт Управления Капитального Строительства Министерства Тракторного И Сельскохозяйственного Машиностроения Ссср Вентил ционное устройство
SU1733863A1 (ru) * 1990-01-05 1992-05-15 Центральный научно-исследовательский и проектный институт "Тайфун" Вентил ционное устройство

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962952A (en) * 1957-03-01 1960-12-06 Carrier Corp Air conditioning unit
DE1579906A1 (de) 1965-07-02 1970-09-24 Haelg & Co Einrichtung zur Strahlungsheizung bzw.-kuehlung
US5230656A (en) * 1992-08-05 1993-07-27 Carrier Corporation Mixer ejector flow distributor
US6004204A (en) 1995-03-10 1999-12-21 Luminis Pty Ltd. Induction nozzle and arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ILINCA NASTASE; AMINA MESLEM; JORDACHE VLAD; LOLANDA COLDA: "Building and Environment", vol. 46, 2011, ELSEVIER, article "Lobed grilles for high mixing ventilation - An experimental analysis in a full scale model room", pages: 547 - 555

Also Published As

Publication number Publication date
FR3020132B1 (fr) 2016-05-27
RU2015114246A3 (de) 2018-10-25
RU2675715C2 (ru) 2018-12-24
EP2933575B1 (de) 2018-12-05
RU2015114246A (ru) 2016-11-10
FR3020132A1 (fr) 2015-10-23

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