WO2023222613A1 - Échangeur de chaleur pour véhicule automobile - Google Patents

Échangeur de chaleur pour véhicule automobile Download PDF

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Publication number
WO2023222613A1
WO2023222613A1 PCT/EP2023/062992 EP2023062992W WO2023222613A1 WO 2023222613 A1 WO2023222613 A1 WO 2023222613A1 EP 2023062992 W EP2023062992 W EP 2023062992W WO 2023222613 A1 WO2023222613 A1 WO 2023222613A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
collecting chamber
ducts
inlet openings
exchanger ducts
Prior art date
Application number
PCT/EP2023/062992
Other languages
English (en)
Inventor
Condro SEKTI
Kamel Azzouz
Original Assignee
Valeo Klimasysteme Gmbh
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 Klimasysteme Gmbh filed Critical Valeo Klimasysteme Gmbh
Publication of WO2023222613A1 publication Critical patent/WO2023222613A1/fr

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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
    • F28D1/05375—Assemblies of conduits connected to common headers, e.g. core type radiators with particular pattern of flow, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • 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
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates
    • 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
    • F28D2021/0084—Condensers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove

Definitions

  • the invention relates to a heat exchanger for a motor vehicle.
  • Heat exchangers of this type are known and are conventionally part of a heat pump system which is designed to air condition the interior of a motor vehicle, i.e. in particular the region which is provided for vehicle occupants. For this purpose, heat is transferred by means of the heat pump system from an external reservoir to the vehicle interior or is output from the latter to the external reservoir.
  • the external reservoir In the case of motor vehicles with an internal combustion engine, in the heating mode the external reservoir is normally the internal combustion engine.
  • the heat exchanger which is also referred to as an external heat exchanger, can be operated in a second operating mode as an external condenser in order to output heat to the surroundings.
  • a disadvantage of such heat exchangers is that they operate comparatively inefficiently and therefore have an adverse effect on the system efficiency, in particular in the case of systems with an electrically operated compressor.
  • the electrical power of the compressor has a substantial influence on the energy consumption of the battery in the case of electrically driven vehicles, such as electric or hybrid vehicles, and therefore on the range thereof.
  • an inefficient external heat exchanger results in lower heating power in winter and in lower cooling power in summer.
  • a heat exchanger for a motor vehicle having a first collecting chamber, a second collecting chamber and a third collecting chamber, an inlet, an outlet and a plurality of first and second heat exchanger ducts running in parallel.
  • the first and the third collecting chamber run along an edge of the heat exchanger, and the second collecting chamber runs along an opposite edge.
  • the first heat exchanger ducts extend between the first and the second collecting chamber and the second heat exchanger ducts extend between the second and the third collecting chamber and in each case merge into said collecting chambers in terms of flow.
  • the heat exchanger is designed in such a manner that, during operation, a fluid flows from the inlet into the first collecting chamber and from the latter through the first heat exchanger ducts into the second collecting chamber and subsequently from the second collecting chamber through the second heat exchanger ducts into the third collecting chamber in the direction of the outlet.
  • a plate having a multiplicity of throughflow holes is positioned in the second collecting chamber and is arranged opposite inlet openings of the second heat exchanger ducts.
  • the plate reduces vortices of the fluid flowing through the heat exchanger during operation and promotes a particularly uniform distribution of the fluid to all of the second heat exchanger ducts.
  • the plate divides the fluid flow in the second collecting chamber in such a manner that a substantially equally sized fluid flow or volume of fluid flows through each of the second heat exchanger ducts.
  • the heat exchanger ducts of the heat exchanger operate particularly effectively and the heat exchanger is particularly efficient, in particular in comparison to a conventional heat exchanger without a corresponding plate.
  • the fluid is in particular a refrigerant or a coolant.
  • the heat exchanger is an external heat exchanger for a reversible heat pump system of a motor vehicle.
  • the heat exchanger can operate in one operating mode as a condenser and in another operating mode as an evaporator.
  • the plate looking in the direction of extent of the heat exchanger ducts, to extend over at least 90%, in particular 100%, of the inlet openings of the second heat exchanger ducts, in order to reliably ensure that the fluid is divided homogeneously between the second heat exchanger ducts or homogeneously flows through them. Additionally or alternatively, the plate, looking in the direction of extent of the heat exchanger ducts, cannot extend over the outlet openings of the first heat exchanger ducts, in order to ensure that the plate does not obstruct the fluid flowing out of the first heat exchanger ducts into the second collecting chamber.
  • the plate has a number of throughflow holes corresponding to the number of second heat exchanger ducts.
  • each of the inlet openings of the second heat exchanger ducts can be assigned a throughflow hole of the plate, said throughflow hole being arranged opposite the respective inlet opening.
  • the cross section of the throughflow holes and the cross section of the inlet openings of the second heat exchanger ducts have a complementary shape. In this way, the fluid flows particularly reliably without vortices via the throughflow holes into the inlet openings.
  • the throughflow holes can be made to each have a height in the direction of extent of the second collecting chamber that is between 90% and 1 10% of the height of the inlet openings of the second heat exchanger ducts.
  • the throughflow holes can each have a width perpendicular to the direction of extent of the second collecting chamber that is between 50% and 90% of the width of the inlet openings of the second heat exchanger ducts.
  • This configuration has the advantage that the fluid flowing through the plate is conducted particularly effectively into the inlet openings of the second heat exchanger ducts.
  • the fluid is introduced centrally into the inlet openings of the second heat exchanger ducts such that the fluid does not flow onto the ends of the duct walls that surround the inlet openings of the second heat exchanger ducts and form vortices thereon.
  • the plate extends in a plane which is arranged parallel to a plane in which the inlet openings of the second heat exchanger ducts are arranged. This promotes local pressure ratios, ensuring a uniform distribution of the fluid to all of the second heat exchanger ducts.
  • the distance between the plate and the inlet openings of the second heat exchanger ducts is less than 50%, in particular less than 25%, of the distance between the inlet openings of the second heat exchanger ducts and an inner wall of the second collecting chamber, which inner wall is opposite the inlet openings.
  • the plate is arranged particularly close to the inlet openings of the second heat exchanger ducts, and therefore the fluid flowing through the plate is conducted particularly effectively into the inlet openings of the second heat exchanger ducts and distributed to the second heat exchanger ducts.
  • the plate can be connected via lateral positioning extensions and/or positioning recesses in a form-fitting manner to the second collecting chamber. A precise arrangement of the plate in relation to the second heat exchanger ducts is thereby ensured using simple means.
  • This configuration has the advantage that the heat exchanger has a low flow resistance for fluid flowing through it.
  • FIG. 1 shows a schematic illustration of a heat exchanger according to the invention with a plate
  • FIG. 2 shows, in a side view, a section of the heat exchanger from Figure 1 , the section showing the plate in front of inlet openings of second heat exchanger ducts of the heat exchanger,
  • FIG. 3 shows, in a side view, the plate from Figure 1
  • - Figure 4 shows, in a detailed view, the cutout C from Figure 2.
  • Figure 1 shows a heat exchanger 10 for a motor vehicle.
  • the heat exchanger 10 in this case is an external heat exchanger for a reversible heat pump system of the motor vehicle, which heat exchanger can be operated in one operating mode as a condenser and in another operating mode as an evaporator.
  • the motor vehicle is in particular a vehicle with an electric driving mode, such as an electric vehicle or hybrid vehicle.
  • the heat exchanger 10 has a first collecting chamber 12 with an inlet 14, a second collecting chamber 16 and a third collecting chamber 18 with an outlet 20, and a multiplicity of first heat exchanger ducts 22, which connect the first collecting chamber 12 to the second collecting chamber 16 in terms of flow, and a multiplicity of second heat exchanger ducts 24, which connect the second collecting chamber 16 to the third collecting chamber 18 in terms of flow.
  • the first collecting chamber 12 and the third collecting chamber 18 are arranged at an edge 26 of the heat exchanger 10 and can be part of what is referred to as a first collecting tube 28, with a separating plate 30, which separates the first collecting chamber 12 from the third collecting chamber 18 in terms of flow.
  • the second collecting chamber 16 is arranged on an edge 32 of the heat exchanger 10 that is opposite the edge 26 and can be part of a second collecting tube 34.
  • the second collecting chamber 16 extends rectilinearly in direction Z from a first region 36, into which the first heat exchanger ducts 22 open via outlet openings, to a second region 38, from which the second heat exchanger ducts 24 emerge at inlet openings 40 (see Figure 2).
  • a fluid for example a refrigerant
  • the fluid flows via the inlet 14 into the heat exchanger 10
  • the fluid is divided in the first collecting chamber 12 between the first heat exchanger ducts 22 and flows via the latter into the first region 36 of the second collecting chamber 16.
  • the fluid flows into the second region 38 of the second collecting chamber 16, in which region the fluid is divided between the second heat exchanger ducts 24, and flows via the latter into the third collecting chamber 18, and finally out of the heat exchanger 10 through the outlet 20.
  • the flow profile of the fluid is illustrated in Figure 1 by means of arrows.
  • the heat exchanger 10 is therefore a heat exchanger with two passages 41 , 42.
  • the first passage 41 is formed here by the group 44 of first heat exchanger ducts 22, while the second passage 42 is formed by the group 46 of second heat exchanger ducts 24.
  • the number of second heat exchanger ducts 24 is greater than the number of first heat exchanger ducts 22.
  • the number of first heat exchanger ducts 22 can be greater than or equal to the number of second heat exchanger ducts 24.
  • the heat exchanger 10 is a flat cuboid, in which the group 44 of first heat exchanger ducts 22 and the group 46 of second heat exchanger ducts 24 are arranged one above another in direction Z or laterally next to one another, and through which cooling air flows during operation in a direction (Y) perpendicular to the plane of the drawing. All the heat exchanger ducts 22, 24 run parallel and next to one another in one plane.
  • the heat exchanger 10 has a plate 50 with a multiplicity of throughflow holes 52 (see Figure 3).
  • the plate 50 extends in this case in a Y-Z plane and is arranged at a distance a from the inlet openings 40 of the second heat exchanger ducts 24, which inlet openings are likewise arranged in a Y-Z plane.
  • the distance a in this case is approximately 20% of the distance A of the inlet openings 40 of the second heat exchanger ducts 24 in relation to an inner wall 54 of the second collecting chamber 16, which inner wall is arranged opposite the inlet openings 40 of the second heat exchanger ducts 24.
  • the distance a is less than 50%, in particular less than 25%, of the distance A.
  • the plate 50 extends in direction Z over the entire second region 38 or the entire distance D and is therefore arranged in direction X opposite all the inlet openings 40 of the second heat exchanger ducts 24.
  • the plate 50 extends at least to an extent in direction Z such that at least 90% of the inlet openings 40 of the second heat exchanger ducts 24 lie opposite it in direction X.
  • the plate 50 does not extend into the first region 36, but rather ends at the boundary 56 between the first passage 41 and the second passage 42.
  • the plate 50 is therefore not arranged opposite the outlet openings of the first heat exchanger ducts 22.
  • the plate 50 has laterally a plurality of positioning extensions 58 (see Figure 3) and positioning recesses 60 which engage in complementary structures (not illustrated) of the side walls 61 , 62 (see Figure 4) of the second collecting chamber 16, as a result of which the plate 50 is fastened in a form-fitting manner in the second collecting chamber 16.
  • the plate 50 is, for example, a punched part made from sheet metal.
  • the number of throughflow holes 52 corresponds to the number of inlet openings 40 of the second heat exchanger ducts 24, with each inlet opening 40 being assigned a throughflow hole 52.
  • the throughflow holes 52 are arranged coaxially with respect to the inlet openings 40.
  • the inlet openings 40 and the throughflow holes 52 each have a cross section in the form of a rectangle with rounded corners and therefore have a complementary shape to one another.
  • the inlet opening 40 and the throughflow holes 52 can each have any desired shape, for example oval or circular.
  • the throughflow holes 52 have a height H which corresponds to 1 10% of the height h of the inlet openings 40.
  • the height H is between 90% and 1 10% of the height h.
  • the throughflow holes 52 have a width B which corresponds to approximately 70% of the width b of the inlet openings 40.
  • the width B is between 50% and 90% of the width b.
  • the inlet openings 40 and the throughflow holes 52 have the same orientation, which means that their width b, B extends in the Y direction and their height h, H extends in the Z direction.
  • a heat exchanger 10 which has a particularly favourable flow profile for fluid is thereby provided.
  • the fluid in the second region 38 namely flows through the plate 50 or through the throughflow holes 52 of the plate 50 and, in the process, is uniformly distributed to the second heat exchanger ducts 24.
  • the plate 50 thereby adapts the throughflow rates of the fluid through the second heat exchanger ducts 24 to one another.
  • the heat exchanger 10 has a particularly high degree of efficiency and is therefore particularly efficient.
  • the plate 50 suppresses the formation of vortices.

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)

Abstract

La présente invention concerne un échangeur de chaleur (10) pour un véhicule à moteur comprend une première chambre de collecte (12), une deuxième chambre de collecte (16) et une troisième chambre de collecte (18), une entrée (14), une sortie (20) et une pluralité de premier et deuxième conduits d'échangeur de chaleur (22, 24) s'étendant en parallèle. Les premiers conduits d'échangeur de chaleur (22) s'étendent entre la première et la deuxième chambre de collecte (12, 16) et les deuxièmes conduits d'échangeur de chaleur (24) s'étendent entre la deuxième et la troisième chambre de collecte (16, 18) et, dans chaque cas, fusionnent dans lesdites chambres de collecte en termes d'écoulement. Une plaque (50) présentant une pluralité de trous d'écoulement est positionnée dans la deuxième chambre de collecte (16) et est disposée à l'opposé d'ouvertures d'entrée (40) des seconds conduits d'échangeur de chaleur (24).
PCT/EP2023/062992 2022-05-16 2023-05-15 Échangeur de chaleur pour véhicule automobile WO2023222613A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022112229.8A DE102022112229A1 (de) 2022-05-16 2022-05-16 Wärmetauscher für ein Kraftfahrzeug
DE102022112229.8 2022-05-16

Publications (1)

Publication Number Publication Date
WO2023222613A1 true WO2023222613A1 (fr) 2023-11-23

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ID=86656987

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/062992 WO2023222613A1 (fr) 2022-05-16 2023-05-15 Échangeur de chaleur pour véhicule automobile

Country Status (2)

Country Link
DE (1) DE102022112229A1 (fr)
WO (1) WO2023222613A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080023185A1 (en) * 2006-07-25 2008-01-31 Henry Earl Beamer Heat exchanger assembly
US20130126140A1 (en) * 2011-11-18 2013-05-23 Taegyun Park Heat exchanger
EP3425320A1 (fr) * 2016-02-29 2019-01-09 Mitsubishi Heavy Industries, Ltd. Échangeur de chaleur et climatiseur
WO2021095439A1 (fr) * 2019-11-14 2021-05-20 ダイキン工業株式会社 Échangeur de chaleur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080023185A1 (en) * 2006-07-25 2008-01-31 Henry Earl Beamer Heat exchanger assembly
US20130126140A1 (en) * 2011-11-18 2013-05-23 Taegyun Park Heat exchanger
EP3425320A1 (fr) * 2016-02-29 2019-01-09 Mitsubishi Heavy Industries, Ltd. Échangeur de chaleur et climatiseur
WO2021095439A1 (fr) * 2019-11-14 2021-05-20 ダイキン工業株式会社 Échangeur de chaleur

Also Published As

Publication number Publication date
DE102022112229A1 (de) 2023-11-16

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