EP3587980B1 - Échangeur de chaleur pour circuit de circulation de fluide frigorigène - Google Patents

Échangeur de chaleur pour circuit de circulation de fluide frigorigène

Info

Publication number
EP3587980B1
EP3587980B1 EP18179300.1A EP18179300A EP3587980B1 EP 3587980 B1 EP3587980 B1 EP 3587980B1 EP 18179300 A EP18179300 A EP 18179300A EP 3587980 B1 EP3587980 B1 EP 3587980B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
pass
row
inlet
refrigerant fluid
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
EP18179300.1A
Other languages
German (de)
English (en)
Other versions
EP3587980A1 (fr
Inventor
Jan Forst
Tomas Gregor
Jan Snaidauf
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.)
Valeo Vymeniky Tepla sro
Original Assignee
Valeo Vymeniky Tepla sro
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 Valeo Vymeniky Tepla sro filed Critical Valeo Vymeniky Tepla sro
Priority to EP18179300.1A priority Critical patent/EP3587980B1/fr
Publication of EP3587980A1 publication Critical patent/EP3587980A1/fr
Application granted granted Critical
Publication of EP3587980B1 publication Critical patent/EP3587980B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0085—Evaporators

Definitions

  • the present invention concerns a heat exchanger for a refrigerant circuit fitted for an automotive vehicle.
  • the object of the present invention is such a heat exchanger.
  • HVAC heating, ventilating and air conditioning system
  • the HVAC system is associated with a refrigerant circuit inside which a refrigerant fluid circulates.
  • the refrigerant circuit comprises successively a compressor, a condenser or gas cooler, an expansion device and a heat exchanger.
  • the heat exchanger is housed inside the HVAC system to allow a heat exchange between the refrigerant fluid and an air flow circulating inside the HVAC system, before being delivered inside the passenger compartment.
  • EP 1 058 080 A1 discloses a heat exchanger according to the preamble of claim 1.
  • the heat exchanger comprises a first header box and a second header box between which a bunch of tubes is interposed.
  • the first header box and the second header box are both arranged parallel to a longitudinal direction.
  • the tubes are arranged between the first header box and the second header box, each tube having a first extremity in connection with the first header box and a second extremity in connection with the second header box.
  • the tubes are also arranged in a first row of first tubes and a second row of second tubes that are parallel to each other and perpendicular to the longitudinal direction.
  • the first tubes of the first row are in fluid communication with a first chamber of the first header box and a first chamber of the second header box.
  • the second tubes of the second row are in fluid communication with a second chamber of the first header box and a second chamber of the second header box.
  • the second chambers of the second header box are coupled together by a connecting means so that the refrigerant fluid can circulate from one to the other.
  • One of the first chambers of the first header box, the inlet chamber is equipped with a refrigerant fluid inlet through which the refrigerant fluid is admitted in the heat exchanger and the other chamber of the first header box, the outlet chamber, is equipped with a refrigerant fluid outlet through which the refrigerant fluid exits from the heat exchanger.
  • the chambers are partitioned in several portions by at least a partition wall located in the first header box and the second header box. That divides each row in several passes of tubes, the tubes of a same pass having their first extremities in communication with the same portion of the first chamber and having too their second extremities in communication with the same portion of the second chamber.
  • the refrigerant fluid is circulating in the same direction from one header box to the other header box as it is disclosed in the document US2005/0050915 .
  • the temperature of the refrigerant fluid tends to be inhomogeneous from one pass to the other. Furthermore, within the same pass of tubes, the temperature of the refrigerant fluid from one tube to another tube tends to be different. Furthermore again, the temperature of the refrigerant fluid at the first extremity of the tubes of the same pass is different from one tube to another. Finally, within a same pass, the temperature of the refrigerant fluid in the same extremities of the tubes of the considered pass tends to be different from one tube to another tube.
  • the temperature of the refrigerant fluid in the extremity of the tube close to the refrigerant fluid inlet is lower than the extremity opposite to the one close to the refrigerant fluid inlet.
  • the refrigerant fluid tends not to reach the opposite extremity of the tubes of the extremity that is close to the refrigerant fluid inlet for those considered tubes.
  • the temperature of the refrigerant fluid being higher, the air flow is badly cooled down there which decrease the global efficiency of the heat exchanger.
  • the heat exchanger of the invention is a heat exchanger comprising a core and at least one header box that extends mainly in a longitudinal direction.
  • the core comprises at least four passes distributed in two rows. Two first inlet-passes are part of a first row of the heat exchanger and two last outlet-passes are part of a second row of the heat exchanger. Each pass has a respective length measured along the longitudinal direction.
  • the invention relates also to a heating, ventilating and air conditioning system comprising an air duct in which an air flow circulates and the said heat exchanger, the said heat exchanger being located in the air duct so that the air flow circulates firstly through the first row and secondly through the second row.
  • the invention relates also to a utilization of the said heat exchanger as an evaporator in the said refrigerant fluid circuit.
  • the chambers 21, 22 are equipped with partition walls 23 that are dividing the chambers 21, 22 in several portions 24.
  • the partition walls 23 are arranged in respective lateral plans P2 that are parallel to the Oyz plan.
  • the core 2 comprises several passes 25 of tubes 6, the tubes 6 of a same pass 25 have all their first extremities 7 in communication with the same portion 24 of the first chamber 21 of the first header box 3 and have all their second extremities 8 in communication with the same portion 24 of the second chamber 22 of the second header box 3.
  • a pass 25 is a section of a row 11, 12, either the first row 11 or the second row 12, that comprises a plurality of tubes 6, where the refrigerant fluid 4 circulates in all the tubes 6 along the same direction.
  • Two passes 25 of a same row 11, 12 are separated by a partition wall 23.
  • Each pass 25 comprises a plurality of tubes 6 that are regularly distributed along the longitudinal direction A1 parallel to the Ox axis, a tube pitch of each pass 25 being identical at +/-5%.
  • At least two first inlet-passes 25 are part of the first row 11 of the heat exchanger 1 and at least two last outlet-passes 25 are part of the second row 12 of the heat exchanger 1.
  • the two first inlet-passes 25 are immediately contiguous to each other.
  • a first inlet-pass 25 is the inlet-pass 25 that is equipped with the refrigerant fluid inlet 9 of the heat exchanger 1. This means that the first inlet-pass 25 is the inlet-pass 25 admitting the refrigerant fluid 4 inside the heat exchanger 1.
  • the two first inlet-passes 25 comprise the first inlet-pass 25 and the immediate contiguous inlet-pass 25 to the first inlet-pass 25.
  • a last outlet-pass 25 is the outlet-pass 25 that is equipped with the refrigerant fluid outlet 10 from the heat exchanger 1.
  • the two last outlet-passes 25 comprise the last outlet-pass 25 and the immediate contiguous outlet-pass 25 to the last outlet-pass 25. This means that the last outlet-pass 25 is the outlet-pass 25 from which the refrigerant fluid 4 exits from the heat exchanger 1.
  • the two first outlet-passes 25 are immediately contiguous to each other.
  • the passes 25 of the heat exchanger 1 form a refrigerant fluid path along which the refrigerant fluid 4 can circulate from the refrigerant fluid inlet 9 to the refrigerant fluid outlet 10, by flowing first within the inlet-passes 25 and then within the outlet-passes 25.
  • the refrigerant fluid 4 circulates from the first inlet-pass 25 to the last inlet-pass 25.
  • the refrigerant fluid 4 circulates from the first outlet-pass 25 to the last outlet-pass 25.
  • the refrigerant fluid 4 circulates from the first inlet-passes 25 and then in the other passes 25 of the first row 11.
  • the refrigerant fluid 4 exits from the heat exchanger 1 from the last outlet-passes 25 after having circulated inside the other outlet-passes 25.
  • each pass 25 has a respective length measured L along the longitudinal direction, wherein the sum of the length L of the two first inlet-passes 25 is equal +/-10% to the sum of the length L of the two last outlet-passes 25.
  • the length L of the first inlet-pass 25 is bigger than the length L of the last outlet-pass 25.
  • each pass 25 is measured from a first longitudinal side 27 of a pass 25 to a second longitudinal side 28 of the pass 25 in a parallel plan to the longitudinal plan P1.
  • the length L of the last inlet-pass 25 is equal to the length L of the first outlet-pass 25.
  • FIG. 4 illustrates a refrigerant fluid circulation circuit 100 inside which circulates the refrigerant fluid 4.
  • the refrigerant fluid circulation circuit 100 successively comprises a compressor 101 for compressing the refrigerant fluid 4, a condenser or a gas cooler 102 for cooling the refrigerant 4, an expansion device 103 inside which the refrigerant fluid 4 expands and the heat exchanger 1.
  • the heat exchanger 1 is accommodated inside an air duct 104 of a heating, ventilating and air conditioning system 105 inside which circulates the air flow 5.
  • the heat exchanger 1 allows a heat transfer between the refrigerant fluid 4 and the air flow 5 coming into contact with it and/or passing through it, as illustrated in Figure 1 .
  • the heat exchanger 1 is used as an evaporator for cooling the air flow 5, during the passage of the air flow 5 in contact with and/or from one side of the heat exchanger 1.
  • the invention is not limited by the shape of organs or elements as described here, and covers any shape as long as described here, and covers any shape of heat exchanger as long as it comprises a first inlet pass wider the last outlet pass, the width of the two first inlet passes being globally equal to the two last outlet passes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (11)

  1. Échangeur de chaleur (1) comprenant un noyau (2) et au moins un collecteur (3) qui s'étend principalement dans une direction longitudinale (A1), ledit noyau (2) comprenant au moins quatre passages (25) répartis en deux rangées (11, 12), avec deux premiers passages d'entrée (25) faisant partie d'une première rangée (11) de l'échangeur de chaleur (1) et deux derniers passages de sortie (25) faisant partie d'une seconde rangée (12) de l'échangeur de chaleur (1), chaque passage (25) ayant une longueur respective (L) mesurée le long de la direction longitudinale (A1), caractérisé en ce que la somme de la longueur (L) des deux premiers passages d'entrée (L) est égale à +/-10% de la somme de la longueur (L) des deux derniers passages de sortie (L), et la longueur (L) du premier passage d'entrée (L) est supérieure à la longueur (L) du dernier passage de sortie (25).
  2. Échangeur de chaleur (1) selon la revendication 1, dans lequel chaque passage (25) comprend des tubes (6) régulièrement répartis le long de la direction longitudinale (A1), un pas de tube de chaque passage (25) étant identique à +/-5%.
  3. Échangeur de chaleur (1) selon la revendication 1 ou 2, dans lequel les deux premiers passages d'entrée (25) comprennent un premier passage d'entrée (25) qui est équipé d'une entrée de fluide réfrigérant (9) dans le noyau de l'échangeur de chaleur (2) et un second passage d'entrée (25) qui est contigu au premier passage d'entrée (25).
  4. Échangeur de chaleur (1) selon les revendications 1 à 3, dans lequel les deux derniers passages de sortie (25) comprennent un dernier passage de sortie (25) qui est équipé d'une sortie de fluide réfrigérant (10) hors du noyau de l'échangeur de chaleur (2) et un second passage de sortie (2) qui est contigu au dernier passage de sortie (25).
  5. Échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 4, dans lequel le nombre total de passages (25) de l'échangeur de chaleur (1) est un nombre pair.
  6. Échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 4, dans lequel la longueur (L) du dernier passage d'entrée (25) est égale à la longueur (L) du premier passage de sortie (25).
  7. Échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 6, dans lequel l'échangeur de chaleur (1) est configuré pour être traversé par un flux d'air (5) d'abord à travers la seconde rangée (12) et enfin à travers la première rangée (11).
  8. Échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 7, dans lequel l'échangeur de chaleur (1) est pourvu de moyens de communication (13) qui permettent une communication entre la première rangée (11) et la seconde rangée (12), la première rangée (11) et la seconde rangée (12) délimitant ensemble un volume de l'échangeur de chaleur (1).
  9. Système de chauffage, ventilation et climatisation (105) comprenant un conduit d'air (104) dans lequel un flux d'air (5) circule et un échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 8, dans lequel l'échangeur de chaleur (1) est situé dans le conduit d'air (104) de sorte que le flux d'air (5) circule d'abord à travers la première rangée (11) et ensuite à travers la seconde rangée (12).
  10. Circuit de circulation de fluide réfrigérant (100) comprenant au moins un échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 8.
  11. Utilisation de l'échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 8 comme évaporateur dans un circuit de fluide réfrigérant (100) selon la revendication 10.
EP18179300.1A 2018-06-22 2018-06-22 Échangeur de chaleur pour circuit de circulation de fluide frigorigène Active EP3587980B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18179300.1A EP3587980B1 (fr) 2018-06-22 2018-06-22 Échangeur de chaleur pour circuit de circulation de fluide frigorigène

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18179300.1A EP3587980B1 (fr) 2018-06-22 2018-06-22 Échangeur de chaleur pour circuit de circulation de fluide frigorigène

Publications (2)

Publication Number Publication Date
EP3587980A1 EP3587980A1 (fr) 2020-01-01
EP3587980B1 true EP3587980B1 (fr) 2025-08-27

Family

ID=62750843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18179300.1A Active EP3587980B1 (fr) 2018-06-22 2018-06-22 Échangeur de chaleur pour circuit de circulation de fluide frigorigène

Country Status (1)

Country Link
EP (1) EP3587980B1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1058080B1 (fr) * 1999-05-31 2004-08-11 Mitsubishi Heavy Industries, Ltd. Echangeur de chaleur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4233419B2 (ja) 2003-09-09 2009-03-04 カルソニックカンセイ株式会社 蒸発器
KR101936243B1 (ko) * 2012-04-26 2019-01-08 엘지전자 주식회사 열교환기
KR102202418B1 (ko) * 2015-03-19 2021-01-13 한온시스템 주식회사 자동차용 열교환기
EP3138709B1 (fr) * 2015-09-07 2018-05-09 Volvo Car Corporation Système de climatisation et échangeur de chaleur pour un tel système

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1058080B1 (fr) * 1999-05-31 2004-08-11 Mitsubishi Heavy Industries, Ltd. Echangeur de chaleur

Also Published As

Publication number Publication date
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