WO2024023751A1 - Unité de climatisation améliorée - Google Patents

Unité de climatisation améliorée Download PDF

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Publication number
WO2024023751A1
WO2024023751A1 PCT/IB2023/057620 IB2023057620W WO2024023751A1 WO 2024023751 A1 WO2024023751 A1 WO 2024023751A1 IB 2023057620 W IB2023057620 W IB 2023057620W WO 2024023751 A1 WO2024023751 A1 WO 2024023751A1
Authority
WO
WIPO (PCT)
Prior art keywords
air conditioning
space
conditioning unit
dampers
damper
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.)
Ceased
Application number
PCT/IB2023/057620
Other languages
English (en)
Inventor
Luigi Rosso
Guido DACCO'
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.)
Mitsubishi Electric Hydronics and IT Cooling Systems SpA
Original Assignee
Mitsubishi Electric Hydronics and IT Cooling Systems 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
Priority claimed from US17/876,216 external-priority patent/US12560344B2/en
Priority claimed from IT102022000016014A external-priority patent/IT202200016014A1/it
Application filed by Mitsubishi Electric Hydronics and IT Cooling Systems SpA filed Critical Mitsubishi Electric Hydronics and IT Cooling Systems SpA
Priority to EP23751730.5A priority Critical patent/EP4562979A1/fr
Publication of WO2024023751A1 publication Critical patent/WO2024023751A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
    • H05K7/206—Air circulating in closed loop within cabinets wherein heat is removed through air-to-air heat-exchanger
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
    • H05K7/20618—Air circulating in different modes under control of air guidance flaps
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
    • H05K7/20663—Liquid coolant with phase change, e.g. heat pipes
    • H05K7/20681—Liquid coolant with phase change, e.g. heat pipes within cabinets for removing heat from sub-racks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/54—Free-cooling systems

Definitions

  • the present invention concerns an air conditioning unit , in particular a packaged air conditioning unit .
  • the present invention finds its preferred, although not exclusive , application in telecommunication and IT shelters conditioning . Reference will be made to this application by way of example below .
  • Air conditioning unit perform a refrigeration cycle to cool or heat an airflow directed to an environment to be conditioned .
  • the air conditioning units provide a cool air flow to maintain the aforementioned spaces at a predefined temperature to guarantee a good operation of the electronic elements of the telecommunication and IT shelters .
  • the aforementioned air conditioning units with a so-called "free cooling" functionality, i . e . to avoid to use energy to carry out actively the refrigeration cycle and use the external air to the space to be conditioned to cool down the space itsel f .
  • An aim of the present invention is to satis fy the above mentioned needs in a cost-ef fective and optimi zed manner .
  • Figure 1 is a schematic representation of a first embodiment of an air conditioning unit according to the invention
  • Figure 2 is a schematic representation of a second embodiment of an air conditioning unit according to the invention.
  • Figures 3A-3B are schematic representation of the air conditioning unit of figures 1 and 2 in a first operative condition
  • Figures 4A-4B are schematic representation of the air conditioning unit of figures 1 and 2 in a first operative condition
  • Figures 5A-5B are schematic representation of the air conditioning unit of figures 1 and 2 in a first operative condition
  • Figures 6A- 6B are schematic representation of the air conditioning unit of figures 1 and 2 in a first operative condition .
  • Figures 1 and 2 discloses an air conditioning unit 1 for condition a space S delimited by a structure B provided with a first and a second opening O' , O' ' .
  • the structure B may be a building provided with a pair of openings O' , O' ' that are linearly, e . g . vertically, aligned one with respect to the other, i . e . the opening planes are substantial coincident .
  • the air conditioning unit 1 comprises a structure 2 , preferably substantially rectangular in shape , and configured to limit a space 3 from the environment .
  • the structure 2 further defines two openings 3a, 3b configured to allow the fluidic communication of space 3 with first and second openings O' , O' ' of structure B . Accordingly, also openings 3a, 3b are aligned parallel to a longitudinal axis of the structure 2 and are preferably coplanar one with the other .
  • the structure 2 comprises a lateral wall 2 ’ opposite to the openings 3a, 3b and a pair of terminal walls 2 ’ ’ , 2 ’ ’ ’ namely an upper wall 2 ’ ’ and a lower wall 2 ’ ’ ’ .
  • the aforementioned walls are connected together to define the space 3 that is separated by the environment .
  • the air conditioning unit 1 comprises , housed within space 3 , an air conditioning arrangement 4 configured to allow insertion through one of openings O' , O' ' of a conditioned air flow .
  • the air conditioning arrangement 4 comprises , inter alia, a cooling coil 5 configured to allow the cooling of an airflow passing through this latter and a first and a second ventilation means 6 , 7 configured to allow circulation of air flow within space 3 as outlined in detail below .
  • a cooling coil 5 configured to allow the cooling of an airflow passing through this latter
  • a first and a second ventilation means 6 , 7 configured to allow circulation of air flow within space 3 as outlined in detail below .
  • Other details of the air conditioning arrangement 4 will not be provided since they are not pertinent to the present invention .
  • the air conditioning unit 1 is configured to be provided with a free cooling arrangement 10 , 20 configured to allow a free cooling functionality .
  • the free cooling arrangement 10 , 20 comprises a first and a second dampers 11 , 21 , 12 , 22 suitable to be housed within one of openings 3a, 3b of the structure 2 and a third damper 13 , 23 suitable to be housed in lateral wall 2 ' .
  • the aforementioned dampers are configured, i f present , to control , e . g . allow or deny or partially allow, the fluidic communication, respectively, with the space 3 towards space S or to environment outside structure 2 to space 3 .
  • dampers may be real i zed in any suitable shape and are preferably controlled by actuator means (not shown) that can be electronically controlled via an electronic control unit (not shown) .
  • Such electronic control unit may automatically control or be activated by the user to provide di f ferent cooling operations as detailed below .
  • the structure 2 comprises at least a divider wall 15 configured to divide space 3 into at least two portions 3 ' , 3 ' ' wherein a first portion 3 ' houses the second ventilation means 7 and the second portion 3 ' ' houses the first ventilation means 6 and the cooling coil 5 .
  • the first portion 3 ' is selectively or continuously in fluid communication with the environment in order to cool down a heat exchanger making part of the air conditioning arrangement 4 and that need to be cooled to allow operation of cooling coil 5 . Further detai ls will no be provided on such aspect for brevity .
  • the air conditioning unit 1 is configured to provide a cooling flow in the second opening O' ' , i . e . through the second, lower, opening 3b .
  • the cooling coil 5 is placed to occupy the entire lower opening 3b of structure 2 so as to direct the cooled air flow towards the opening O' ' .
  • the first ventilation means 6 is configured to move air towards the lower opening 3b and the second ventilation means 7 are configured to move air from the first opening 3a towards environment
  • the divider wall 15 is placed so as to divide into two portions the first opening 3a each of such two portions houses respectively a first and a second damper 11 , 12 . Therefore the first damper 11 is configured to allow selective fluidic communication of the space S with the first portion 3 ' of space 3 and the second damper 12 is configured to allow selective fluidic communication of the space S with the second portion 3 ' ’ of space 3 .
  • the third damper 13 is housed within the lateral wall 2 ’ and configured to selectively allow the communication of environment with space 3 ' ’ in a position upstream to first ventilation means 6 with respect to the air flow passing through this latter .
  • the air conditioning unit 1 is configured to provide a cooling flow in the first opening O' , i . e . through the first , upper, opening 3a .
  • the cooling coil 5 is placed to occupy the entire first opening 3a of structure 2 so as to direct the cooled air flow towards the opening O' .
  • the first ventilation means 6 is configured to move air towards the upper opening 3a and the second ventilation means 7 are configured to move air from space 3 towards environment
  • the divider wall 15 is placed so as to not interfere with cooling coil 5 , i . e . so that the cooling coil 5 is entirely in second portion 3 ' ’ as mentioned above .
  • the arrangement according to the second embodiment further comprises a second divider wall 25 configured to divide into two portions the first opening 3a each of such two portions houses respectively a first and a second damper 11 , 12 .
  • such second divider wall 25 divides the second portion 3 ' ’ from a further third portion 3 ' ’ ’ that is in fluid communication with the environment via a third opening 3c reali zed in the lower terminal portion 2 ’ ’ ’ .
  • the second divider wall 25 is L- shaped so as not interfere with air conditioning arrangement 4 .
  • the first damper 21 is configured to allow selective fluidic communication of the space S with the second portion 3 ' 9 of space 3 and the second damper 22 is configured to allow selective fluidic communication of the space S with the third portion 3 ’ ’ ’ of space 3 , i . e . to environment .
  • the third damper 23 is housed within the lateral wall 2 ’ and configured to selectively allow the communication of environment with space 3 ’ ’ in a position upstream to first ventilation means 6 with respect to the air flow passing through this latter .
  • a so-called “mechanical cooling” the second damper 12 is opened while the first and third dampers 11 , 13 are closed .
  • the first ventilation means 6 are controlled to suck an air flow from space S and provide such air flow, cooled via cooling coil 5 operated via air cooling arrangement 4 , back within space S .
  • the second ventilation means 7 are controlled to suck air from environment to cool down the other operative elements of the air cooling arrangement 4 .
  • Such operative condition is indicated i f the temperature in environment is greater than the temperature required in space S .
  • a so-called "free cooling" the second damper 12 is closed while the first and third dampers 11 , 13 are opened .
  • the first ventilation means 6 are controlled to suck an air flow from environment via third damper 13 and provide such air flow, within space S .
  • the overpres sure air flow is sucked by second ventilation means 7 that flow out the latter into environment .
  • Such operative condition is indicated i f the temperature in environment is lower than the temperature required in space S .
  • a so-called "partial free cooling" the all the dampers 11 , 12 and 13 are opened .
  • the first ventilation means 6 are controlled to suck an air flow from environment via third damper 13 and provide such air flow, within space S .
  • the overpressure airflow is partially sucked by second ventilation means 7 that flow out the latter into environment and partially sucked by first ventilation means 6 that flow back this latter to the air flow sucked from the third damper 13 .
  • Such operative condition is indicated i f the temperature in environment is lower than the temperature required in space S over a predetermined threshold .
  • a so-called "mechanical and free cooling” the second damper and third dampers 12 , 13 are opened while the first dampers 11 is closed .
  • the first ventilation means 6 are controlled to suck an air flow from the environment and provide such air flow, cooled via cooling coil 5 operated via air cooling arrangement 4 , back within space S .
  • the second ventilation means 7 are controlled to suck air from environment to cool down the other operative elements of the air cooling arrangement 4 .
  • Such operative condition is indicated i fthe external temperature is not low enough to cool the room S to the required temperature .
  • the advantage is that the energy absorbed by the mechanical cooling is lower than with complete cooling .
  • a so-called "mechanical cooling” first damper 21 is opened while the second and third dampers 22 , 23 are closed .
  • the first ventilation means 6 are controlled to suck an air flow from space S and provide such air flow, cooled via cooling coil 5 operated via air cooling arrangement 4 , back within space S .
  • the second ventilation means 7 are controlled to suck air from environment to cool down the other operative elements of the air cooling arrangement 4 .
  • Such operative condition is indicated i f the temperature in environment is greater than the temperature required in space S .
  • a so-called "free cooling" the first damper 21 is closed while the second and third dampers 22 , 23 are opened .
  • the first ventilation means 6 are controlled to suck an air flow from environment via third damper 13 and provide such air flow, within space S .
  • the overpressure air flow naturally flows out via third opening 3c into environment .
  • Such operative condition is indicated i f the temperature in environment is lower than the temperature required in space S .
  • a so-called "partial free cooling" the all the dampers 21 , 22 and 23 are opened .
  • the first ventilation means 6 are controlled to suck an air flow from environment via third damper 23 and provide such air flow, within space S .
  • the overpressure airflow is partially sucked by first ventilation means 6 that flow back this latter to the air flow sucked from the third damper 23 .
  • the overpressure air flow naturally flows out via third opening 3c into environment .
  • Such operative condition is indicated i f the temperature in environment is lower than the temperature required in space S over a predetermined threshold .
  • a so-called "mechanical and free cooling” the first dampers 21 is closed and the second damper and third dampers 22 , 23 are opened .
  • the first ventilation means 6 are controlled to suck an air f low from the environment and provide such air flow, cooled via cooling coil 5 operated via air cooling arrangement 4 , back within space S .
  • the second ventilation means 7 are controlled to suck air from environment to cool down the other operative elements of the air cooling arrangement 4 .
  • the overpressure air flow naturally flows out via third opening 3c into environment
  • Such operative condition is indicated i f the external temperature is not low enough to cool the room S to the required temperature .
  • the advantage is that the energy absorbed by the mechanical cooling is lower than with complete cooling .
  • the proposed common structure allow economy of scale , less time for manufacturing and is versatile .
  • dampers are schemati zed but they can be reali zed as preferred, as on-of f dampers or proportional dampers .

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Air-Flow Control Members (AREA)

Abstract

L'invention concerne une unité de climatisation (1) pour une structure (B) définissant un espace à climatiser, l'unité de climatisation (1) comprenant une structure (2) comprenant une paroi latérale (2') et une paire de parois d'extrémité (2'',2''') reliées l'une à l'autre pour définir un espace (3) et des première et seconde ouvertures (3a, 3b) réalisées dans une paroi opposée à la paroi latérale (2') et conçues pour se trouver face aux ouvertures respectives (O',O'') réalisées dans la structure (B), l'unité de climatisation (1) logeant un agencement de climatisation (4) logé à l'intérieur de l'espace (3) et comprenant une bobine de refroidissement (5), des premiers moyens de ventilation (6) et des seconds moyens de ventilation (7), l'unité de climatisation (1) comprenant au moins une paroi de séparation (15) conçue pour diviser l'espace (3) en au moins deux parties (3',3'') et étant conçue pour comprendre un agencement de refroidissement libre (10, 20) pourvu d'un premier amortisseur et d'un deuxième amortisseur (11, 12 ; 21 22) appropriés pour être logés à l'intérieur d'une ouverture parmi des première et seconde ouvertures (3a, 3b) de la structure (2) et un troisième amortisseur (13 ; 23) approprié pour être logé à travers la paroi latérale (2').
PCT/IB2023/057620 2022-07-28 2023-07-27 Unité de climatisation améliorée Ceased WO2024023751A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23751730.5A EP4562979A1 (fr) 2022-07-28 2023-07-27 Unité de climatisation améliorée

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT102022000016014 2022-07-28
US17/876,216 US12560344B2 (en) 2022-07-28 2022-07-28 Air conditioning unit
IT102022000016014A IT202200016014A1 (it) 2022-07-28 2022-07-28 Unita' di condizionamento d'aria migliorata
US17/876,216 2022-07-28

Publications (1)

Publication Number Publication Date
WO2024023751A1 true WO2024023751A1 (fr) 2024-02-01

Family

ID=87561067

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2023/057620 Ceased WO2024023751A1 (fr) 2022-07-28 2023-07-27 Unité de climatisation améliorée

Country Status (2)

Country Link
EP (1) EP4562979A1 (fr)
WO (1) WO2024023751A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217879A2 (fr) * 2000-12-22 2002-06-26 Siemens Information and Communication Networks S.p.A. Méthode et équipement pour le conditionnement thermique d' armoires contenant des composants électroniques
WO2010009626A1 (fr) * 2008-07-25 2010-01-28 华为技术有限公司 Échangeur de chaleur et dispositif de communication
US20160178223A1 (en) * 2014-12-22 2016-06-23 Diversified Control, Inc. Equipment Enclosure With Multi-Mode Temperature Control System

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217879A2 (fr) * 2000-12-22 2002-06-26 Siemens Information and Communication Networks S.p.A. Méthode et équipement pour le conditionnement thermique d' armoires contenant des composants électroniques
WO2010009626A1 (fr) * 2008-07-25 2010-01-28 华为技术有限公司 Échangeur de chaleur et dispositif de communication
US20160178223A1 (en) * 2014-12-22 2016-06-23 Diversified Control, Inc. Equipment Enclosure With Multi-Mode Temperature Control System

Also Published As

Publication number Publication date
EP4562979A1 (fr) 2025-06-04

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