EP3537056B1 - Indoor air-conditioning unit - Google Patents

Indoor air-conditioning unit Download PDF

Info

Publication number
EP3537056B1
EP3537056B1 EP19161427.0A EP19161427A EP3537056B1 EP 3537056 B1 EP3537056 B1 EP 3537056B1 EP 19161427 A EP19161427 A EP 19161427A EP 3537056 B1 EP3537056 B1 EP 3537056B1
Authority
EP
European Patent Office
Prior art keywords
air
container
box
conditioning unit
longitudinal
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
EP19161427.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3537056A1 (en
Inventor
Pierpaolo Cavallo
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.)
Aermec SpA
Original Assignee
Aermec SpA
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 Aermec SpA filed Critical Aermec SpA
Priority to SI201930497T priority Critical patent/SI3537056T1/sl
Priority to HRP20230329TT priority patent/HRP20230329T1/hr
Priority to RS20230254A priority patent/RS64094B1/sr
Publication of EP3537056A1 publication Critical patent/EP3537056A1/en
Application granted granted Critical
Publication of EP3537056B1 publication Critical patent/EP3537056B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/00075—Indoor units, e.g. fan coil units receiving air from a central station
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • 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
    • 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
    • F24F5/0092—Systems using radiation from walls or panels ceilings, e.g. cool ceilings

Definitions

  • the present invention relates to an indoor air-conditioning unit.
  • the present invention relates to an active chilled beam to which the following description will make explicit reference without however losing in generality.
  • active chilled beams are apparatuses that are usually fixed on the ceiling of the room to be conditioned and are designed to continuously introduce fresh air (i.e. air that has been dehumidified, filtered and conditioned by an air-handling unit that drives and treats external air inside the room), simultaneously heating or cooling the air already present in the room.
  • fresh air i.e. air that has been dehumidified, filtered and conditioned by an air-handling unit that drives and treats external air inside the room
  • the most common active chilled beams on the market basically consist of a large and oblong box-like container, usually rectilinear and having a circular or rectangular cross-section, which extends horizontally close to the ceiling and is adapted to receive a flow of fresh air from an external a Vogellic source; and of an air/liquid heat exchanger which extends adjacent to the box-like container, substantially for the whole length of the container, and is connected to an external hydraulic circuit so as to be continuously crossed by a flow of hot or cold water.
  • the box-like container traditionally called plenum, is provided with a series of small air-outlet holes that are formed on the wall of the box-like container near the heat exchanger so that the air flow coming out from the single holes of the box-like container creates, in the immediate vicinity of the heat exchanger, an additional convective motion that drives the ambient air through the heat exchanger, where it is heated or cooled according to the temperature difference existing between the ambient air and the water circulating in the exchanger.
  • US2002/062948 A1 discloses an active chilled beam wherein the box-like container has a longitudinal recess which has a substantially W-shaped cross-section and accommodates the heat exchanger.
  • the active chilled beams described above have a rather limited use because the pressure drops created in the air flowing inside the box-like container do not allow realizing cold beams with a length over 2-3 meters.
  • the speed of the air flowing out from the individual air-outlet holes of the box-like container in fact, rapidly decreases by increasing the distance to the fresh air inlet in the box-like container, and with it the strength of the additional convective motion driving the ambient air through the heat exchanger.
  • Aim of the present invention is therefore to improve the performance of the active chilled beams described above.
  • an indoor air-conditioning unit as defined in claim 1 and preferably, though not necessarily, in any of the claims dependent on it.
  • the number 1 denotes as a whole an indoor air-conditioning unit that is adapted to continuously add fresh air (i.e. air that has been dehumidified, filtered and conditioned by an air handling unit that drives and treats external air) inside the room to be conditioned, while heating or cooling the air already present inside the room.
  • fresh air i.e. air that has been dehumidified, filtered and conditioned by an air handling unit that drives and treats external air
  • the air-conditioning unit 1 is particularly adapted to be fixed to, or recessed in, the ceiling of the room to be conditioned, preferably in a substantially horizontal position.
  • the air-conditioning unit 1 in particular comprises: a large box-like container or plenum 2 that is preferably structured to be fixed to, or recessed in, the ceiling of the room to be conditioned, preferably in a substantially horizontal position, and is provided with an inlet mouth 3 adapted to be connected to an external aeraulic source of known type (not shown) so as to receive at inlet a flow of fresh air f having a pressure slightly higher than the ambient pressure; and at least two, preferably air/liquid and preferably with a plate-like structure, heat exchanger 4 that extends next to the box-like container 2 locally substantially skimmed over the box-like container 2, preferably substantially for the whole length of heat exchanger 4 and/or of box-like container 2, and is adapted to be connected to an external hydraulic circuit (not shown) so as to be continuously crossed by a flow of water or other heat-transfer fluid at a given temperature which is preferably controlled by an external cooling and/or heating unit.
  • a large box-like container or plenum 2 that is preferably
  • the temperature of the heat-transfer fluid circulating in the heat exchangers 4 is preferably higher or lower than that of the air present in the room accommodating the air-conditioning unit 1.
  • each heat exchanger 4 extends beside the box-like container 2 so as to form/delimit, on the side of the box-like container 2, a respective gap 5; and the box-like container 2 is moreover provided with a series of small air-outlet openings 6, which are adapted to direct/project inside the gap 5 as many air jets g adapted to generate /create, in the immediate vicinity of each heat exchanger 4, an additional convective motion that drives/brings the ambient air through the same heat exchanger 4.
  • the air-outlet openings 6 are preferably arranged on the wall of box-like container 2 so as to face the gap(s) 5.
  • each opening 6 is adapted to continuously remove air from the box-like container 2, so that the outgoing air jet g can flow through the gap 5 preferably lapping the face of the heat exchangers 4, and can create, in the immediate vicinity of each heat exchanger 4, an additional convective motion that drives the ambient air through the heat exchanger 4, where it is heated or cooled based on the temperature difference between the ambient air and the water or other heat-transfer liquid circulating in the exchanger.
  • the box-like container or plenum 2 is oblong in shape, and the heat exchangers 4 extend next to the box-like container 2 while remaining locally substantially parallel to the box-like container 2.
  • the air-outlet openings 6 are preferably formed on the wall of box-like container 2 spaced one after the other preferably in regular manner, so as to form at least one row of openings that extends beside the or a respective gap 5, preferably for the whole length of the same gap 5.
  • the oblong box-like container 2 preferably extends parallel to a given longitudinal axis L, and the heat exchangers 4 extend alongside the box-like container 2 parallel to the longitudinal axis L, preferably substantially for the whole length of the container.
  • the oblong box-like container 2 is preferably substantially rectilinear.
  • the air-outlet openings 6 are preferably formed on the wall of box-like container 2 spaced one after the other preferably in regular manner, so as to form at least one row of openings that preferably extends parallel to the longitudinal axis L of box-like container 2.
  • the box-like container 2 preferably has a substantially regular prism-shaped structure.
  • the box-like container 2 furthermore has, on its lower face (i.e. on the face turned towards the floor), a longitudinal recess or indentation 7 that preferably extends parallel to the container longitudinal axis L, preferably substantially for the whole length of the box-like container 2, and is dimensioned so as to be able to accommodate the heat exchangers 4.
  • the heat exchangers 4 additionally extend inside the longitudinal recess or indentation 7 parallel to the container longitudinal axis L.
  • the air-conditioning unit 1 is preferably also provided with an air-permeable plate-shaped cover 8, which preferably has a grid structure and closes the opening of said longitudinal recess or indentation 7.
  • the longitudinal recess or indentation 7 moreover has a substantially W-shaped cross-section, and is preferably arranged astride of the mid-plane of box-like container 2.
  • the box-like container 2 is preferably substantially parallelepiped in shape and is preferably made of metal sheet.
  • the air-conditioning unit 1 is provided with two oblong heat exchangers 4 with a plate-like structure, which extend side by side to one another roughly parallel to the container longitudinal axis L and are preferably fully accommodated/contained within the longitudinal recess or indentation 7.
  • the two heat exchangers 4 are moreover arranged in a substantially upside-down V-shaped configuration so as to extend inside the longitudinal recess or indentation 7 with a substantially W-shaped cross section, each locally substantially skimmed over a respective flat side portion of the bottom wall 9 of the same longitudinal recess or indentation 7.
  • the bottom wall 9 of the longitudinal recess or indentation 7 with a substantially W-shaped cross section has a central flat strip 9a and two lateral flat strips 9b that are inclined with respect to the central flat strip 9a and are connected to the central flat strip 9a by two substantially S-shaped longitudinal folds 9c.
  • the central flat strip 9a is substantially perpendicular to the mid-plane M of the longitudinal recess or indentation 7, whereas the two lateral flat strips 9b are inclined in a substantially specular manner with respect to the mid-plane M.
  • each heat exchanger 4 is arranged close to a respective lateral flat strip 9b of the bottom wall 9 of the longitudinal recess or indentation 7 so as to form a longitudinal gap 5 with a preferably convergent-divergent profile towards the mouth of the longitudinal recess or indentation 7.
  • the air-outlet openings 6 of box-like container 2 are preferably realized on the bottom wall 9 of the longitudinal recess or indentation 7 with a substantially W-shaped cross section, and are preferably arranged so as to form at least two adjacent rectilinear rows parallel to the container longitudinal axis L, each of which is locally aligned/facing a respective longitudinal gap 5.
  • the heat exchangers 4 are preferably arranged in a substantially specular position, on opposite sides of the mid-plane M of the longitudinal recess or indentation 7 wirh a substantially W-shaped cross section, inclined by a predetermined angle ⁇ with respect to the mid-plane M.
  • the value of inclination angle ⁇ furthermore ranges between 15° and 90° and is optionally equal to about 60°.
  • the air-outlet openings 6 of box-like container 2 are preferably arranged so as to form two rectilinear rows adjacent and parallel to the container longitudinal axis L, which are arranged on the bottom wall 9 of the longitudinal recess or indentation 7 with a substantially W-shaped cross-section in a substantially specular position on opposite sides of the mid-plane M of the longitudinal recess or indentation 7, preferably each at a respective substantially S-shaped longitudinal fold 9c of bottom wall 9.
  • each heat exchanger 4 is moreover a finned pack heat exchanger.
  • the air-conditioning unit 1 finally comprises, for at least one and preferably all the air-outlet openings 6 of the box-like container 2, also a respective converging nozzle 10, preferably having a horn- or funnel-shaped profile, that joins to the air-outlet opening 6 so as to reduce the pressure drops of the air leaving the box-like container 2 through the same air-outlet opening 6.
  • each converging nozzle 10 is shaped so as to reduce the pressure drops of the air leaving the air-outlet opening 6, consequently increasing the speed of the air jet g that penetrates into the gap 5 lapping the face of the heat exchangers 4.
  • the/each converging nozzle 10 is furthermore arranged inside the box-like container 2, in abutment against the wall of the box-like container 2 where the corresponding air-outlet opening 6 is located.
  • the/each converging nozzle 10 preferably extends substantially coaxial to a reference axis A that is locally substantially perpendicular to the laying plane of the corresponding air-outlet opening 6.
  • the converging nozzles 10 are furthermore incorporated in at least one longitudinal bar 11, which is preferably made of plastic material and is arranged in abutment against the wall of the box-like container 2, immediately over at least one section or a corresponding row of air-outlet openings 6, so that each converging nozzle 10 is aligned with a respective air-outlet opening 6 of said section of the row of openings.
  • the air-conditioning unit 1 is preferably provided with at least one longitudinal bar 11 that incorporates a plurality of converging nozzles 10, extends inside the box-like container 2 parallel to the container longitudinal axis L, and is arranged in abutment against the wall of the box-like container 2 so as to cover at least one section of a corresponding row of air-outlet openings 6, and so that each converging nozzle 10 is aligned with a respective air-outlet opening 6 of the same section of the row of openings.
  • the converging nozzles 10 are spaced on the longitudinal bar 11 so that each converging nozzle 10 is aligned with a respective air-outlet opening 6 of the underlying row of openings.
  • the longitudinal bar 11 is further dimensioned so as to extend above the entire row of air-outlet opening 6 and incorporates a number of converging nozzles 10 equal to the number of air-outlet openings 6 forming the same row of openings.
  • the air-conditioning unit 1 is preferably provided with two longitudinal bars 11, which extend inside the box-like component 2 parallel to the container longitudinal axis L and are each arranged in abutment against a respective substantially S-shaped longitudinal fold 9c of the bottom wall 9 of the longitudinal recess or indentation 7, immediately above a corresponding row of air-outlet openings 6.
  • each longitudinal bar 11 is furthermore dimensioned so as to cover the entire row of air-outlet openings 6, and is moreover provided with a series of converging nozzles 10 that are spaced so that each converging nozzle 10 is aligned with a respective air-outlet opening 6 of the underlying row of openings.
  • the/each longitudinal bar 11 is preferably longitudinally divided into a plurality of modular segments.
  • the higher speed of the air jets g produces an additional convective motion that is much stronger and more turbulent, and drives a greater quantity of ambient air through the heat exchangers 4, thus increasing the heat exchange with the environment and, thus, the overall energy efficiency of the air-conditioning unit 1.
  • the particular shape of the longitudinal recess or indentation 7 and the arrangement of the heat exchangers 4 inside the same longitudinal recess or indentation 7 increase the convective motion around the heat exchanger 4, further increasing the energy efficiency of the air-conditioning unit 1.
  • the converging nozzles 10 can be made by moulding, directly on the metal sheet forming the wall of the box-like container 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Other Air-Conditioning Systems (AREA)
EP19161427.0A 2018-03-07 2019-03-07 Indoor air-conditioning unit Active EP3537056B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SI201930497T SI3537056T1 (sl) 2018-03-07 2019-03-07 Notranja klimatska enota
HRP20230329TT HRP20230329T1 (hr) 2018-03-07 2019-03-07 Unutarnja jedinica za klimatizaciju
RS20230254A RS64094B1 (sr) 2018-03-07 2019-03-07 Unutrašnja jedinica za klimatizaciju

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000003335A IT201800003335A1 (it) 2018-03-07 2018-03-07 Unita' di condizionamento dell'aria per interni

Publications (2)

Publication Number Publication Date
EP3537056A1 EP3537056A1 (en) 2019-09-11
EP3537056B1 true EP3537056B1 (en) 2023-02-22

Family

ID=62386784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19161427.0A Active EP3537056B1 (en) 2018-03-07 2019-03-07 Indoor air-conditioning unit

Country Status (12)

Country Link
EP (1) EP3537056B1 (es)
DK (1) DK3537056T3 (es)
ES (1) ES2939479T3 (es)
FI (1) FI3537056T3 (es)
HR (1) HRP20230329T1 (es)
HU (1) HUE061318T2 (es)
IT (1) IT201800003335A1 (es)
LT (1) LT3537056T (es)
PL (1) PL3537056T3 (es)
PT (1) PT3537056T (es)
RS (1) RS64094B1 (es)
SI (1) SI3537056T1 (es)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6761681A (en) * 1980-02-25 1981-09-03 Environ Mechanical Services Pty. Ltd. An air conditioning induction unit
DE3321612A1 (de) * 1983-06-15 1984-12-20 Howaldtswerke-Deutsche Werft Ag Hamburg Und Kiel, 2300 Kiel Klimageraet
SE521038C2 (sv) * 1998-06-23 2003-09-23 Stifab Farex Ab Takmonterad anordning för kylning av rumsluft samt tillförsel av tilluft
FI117682B (fi) * 2000-11-24 2007-01-15 Halton Oy Tuloilmalaite
US20100140363A1 (en) * 2008-12-05 2010-06-10 Joachim Hirsch Air powered terminal unit and system
US20160334117A1 (en) * 2014-01-16 2016-11-17 Desiccant Rotors International Private Ltd. Induction supply air terminal unit with increased air induction ratio, method of providing increased air induction ratio

Also Published As

Publication number Publication date
DK3537056T3 (da) 2023-03-13
FI3537056T3 (fi) 2023-04-03
IT201800003335A1 (it) 2019-09-07
EP3537056A1 (en) 2019-09-11
LT3537056T (lt) 2023-04-11
SI3537056T1 (sl) 2023-04-28
PT3537056T (pt) 2023-03-22
ES2939479T3 (es) 2023-04-24
RS64094B1 (sr) 2023-04-28
PL3537056T3 (pl) 2023-05-08
HUE061318T2 (hu) 2023-06-28
HRP20230329T1 (hr) 2023-06-09

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