WO2022008197A1 - Unité d'échange de chaleur pour véhicule - Google Patents

Unité d'échange de chaleur pour véhicule Download PDF

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Publication number
WO2022008197A1
WO2022008197A1 PCT/EP2021/066467 EP2021066467W WO2022008197A1 WO 2022008197 A1 WO2022008197 A1 WO 2022008197A1 EP 2021066467 W EP2021066467 W EP 2021066467W WO 2022008197 A1 WO2022008197 A1 WO 2022008197A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
heat exchange
connector
exchange unit
refrigerant fluid
Prior art date
Application number
PCT/EP2021/066467
Other languages
English (en)
Inventor
Condro SEKTI
Pawel SUS
Sebastien Riviere
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 WO2022008197A1 publication Critical patent/WO2022008197A1/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
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0417—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures
    • 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
    • F25B39/04—Condensers
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/02—Subcoolers
    • 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
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • 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
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0443—Combination of units extending one beside or one above the other
    • 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
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • 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

Definitions

  • the present invention relates to the domain of the thermal treatment systems adapted to be received in automotive vehicles. More precisely, the invention relates to heat exchange units which are part of such thermal treatment systems.
  • vehicles comprise at least one thermal treatment system adapted to thermally treat the propulsion system of the vehicle and/ or the passenger compartment of such vehicle.
  • thermal treatment systems usually comprises at least one refrigerant fluid circuit which comprises at least one heat exchanger adapted to operate a heat exchange between the refrigerant fluid and an air flow.
  • the refrigerant fluid circuit can also comprise another heat exchanger adapted to operate a heat exchange between the air flow and the refrigerant fluid, or between the refrigerant fluid and another refrigerant fluid.
  • the air flow and/ or the other refrigerant fluid can then be used to thermally treat the propulsion system and/ or the passenger compartment.
  • Those thermal treatment systems are often arranged in a front part of the vehicle wherein the available space is limited. As a result, there is a need to reduce as much as possible the bulk of such thermal treatment system.
  • the present invention aims to resolve at least this issue by providing a heat exchange unit comprising at least two heat exchangers which are part of the same refrigerant fluid circuit and arranged in order to be the less cumbersome as possible.
  • An object of the present invention thus concerns a heat exchange unit for a vehicle, comprising at least a first heat exchanger adapted to perform a heat exchange between a refrigerant fluid and an air flow, at least a second heat exchanger adapted to operate a heat exchange between the refrigerant fluid and the air flow, the first heat exchanger being arranged downstream of the second heat exchanger along the air flow direction, the heat exchange unit comprising at least one accumulation device hydraulically connected to both the first heat exchanger and the second heat exchanger, at least a first connector and a second connector, the first connector being hydraulically connected to the accumulation device and to the second connector and the second connector being hydraulically connected to the first connector and to the second heat exchanger, at least the second connector being screwed to the first connector.
  • the first connector can be brazed on the first heat exchanger and the second connector can be brazed to the second heat exchanger.
  • the first connector is formed as a single-piece with, at least, the first heat exchanger while the second connector is formed as a single-piece with the second heat exchanger.
  • the second connector being screwed to the first connector, this second connector and the second heat exchanger can easily be replaced without damaging the rest of the exchange unit.
  • the first connector comprises at least a first channel and a second channel, the first channel being hydraulically connected to the first heat exchanger and to the accumulation device and the second channel being hydraulically connected to the accumulation device and to the second connector. That is to say that the first channel of the first connector connects an outlet of the first heat exchanger to an inlet of the accumulation device while the second channel of this first connector connects an outlet of the accumulation device to an inlet of the second connector.
  • the second connector comprises at least one conduit hydraulically connected on one hand to the second channel of the first connector and on the other hand to the second heat exchanger.
  • the conduit connects the second channel of the first connector to an inlet of the second heat exchanger.
  • this conduit is a unique conduit.
  • at least one of the connectors is geometrically interposed between the accumulation device and, at least, the second heat exchanger.
  • both the first and the second connectors are geometrically interposed between the accumulation device and, at least, the second heat exchanger.
  • the second connector may comprise a connecting plug adapted to be received in an orifice arranged in the first connector.
  • the connecting plug is adapted to be received in an orifice which comes out on the second channel of the first connector. If so, the connecting plug is connected to the second channel arranged in the first connector, that is to say that the connecting plug connects the second channel of the first connector to the conduit of the second connector.
  • the first heat exchanger is arranged upstream of the second heat exchanger along a direction of circulation of the refrigerant fluid.
  • the refrigerant fluid that reaches the second heat exchanger has already been subjected to a heat exchange with the air flow within the first heat exchanger.
  • Arranging the first heat exchanger upstream the second heat exchanger along the direction of circulation of the refrigerant fluid but downstream said second heat exchanger along the air flow direction advantageously results in a maximisation of the temperature difference between the refrigerant fluid and the air flow with which the heat exchange is performed, and, thus in an optimization of such heat exchange.
  • the refrigerant fluid thus reaches the first heat exchanger in a gaseous state, exits it in a liquid state and is then subcooled in the second heat exchanger.
  • the efficiency if the refrigerant fluid circuit which comprises the heat exchange unit of the invention is therefore globally improved.
  • the first heat exchanger mainly extends in a first plan
  • the second heat exchanger mainly extends in a second plan, the first plan and the second plan being parallel to each other.
  • the first heat exchanger and the second heat exchanger each comprises at least one heat exchange area, at least one entry manifold adapted to distribute the refrigerant fluid in the heat exchange area and at least one exit manifold adapted to collect the refrigerant fluid that leaves said heat exchange area, the entry manifolds and the exit manifolds of the heat exchangers each extending along a main axis perpendicular to a direction of circulation of the refrigerant fluid in the heat exchange areas.
  • the first heat exchanger’s exit manifold and the second heat exchanger’s entry manifold can be arranged on a same side of the heat exchange unit.
  • the first heat exchanger’s entry manifold and the second heat exchanger’s exit manifold are advantageously arranged on an opposite side of the heat exchange unit.
  • the accumulation device can be arranged on the same side of the heat exchange unit than the first heat exchanger’s exit manifold and the second heat exchanger’s entry manifold.
  • the accumulation device advantageously extends along a main direction parallel to the main axis of extension of the first heat exchanger’s exit manifold.
  • the main direction of extension of the accumulation device can also be parallel to a main axis of extension of the second heat exchanger’s entry manifolds and perpendicular to the direction of circulation of the refrigerant fluid in the heat exchange areas.
  • the accumulation device can extend all along a dimension of the first heat exchanger measured between two ends of this first heat exchanger, along the main axis of extension of the first heat exchanger’s entry manifold.
  • the second heat exchanger presents a smaller height than the first heat exchanger, such heights being measured along a direction included in a main plan of extension of the first heat exchanger and perpendicular to the main direction of circulation of the refrigerant fluid in the first heat exchanger’s heat exchange area.
  • such an arrangement virtually divides the first heat exchanger, and especially the heat exchanger area of this first heat exchanger, in an upper part adapted to be crossed by a first air flow and a lower part adapted to be crossed by a second air flow which also crosses the second heat exchanger.
  • the second air flow crosses the second heat exchanger before crossing the lower part of the first heat exchanger.
  • the present invention also relates to a thermal treatment system for a vehicle, comprising at least one refrigerant fluid circuit carrying at least the heat exchange unit such as the one mentioned above, and at least one circulation device adapted to circulate the refrigerant fluid.
  • the refrigerant fluid is adapted to carry and exchange heat by changing its state.
  • the circulation device is a compression device and the refrigerant fluid circuit also comprises at least one expansion device, that is to say a device adapted to reduce the pressure of the refrigerant fluid which goes through it.
  • FIG. l is a schematic view of a thermal treatment system according to the invention, such thermal treatment system comprising at least one heat exchange unit according to the invention ;
  • FIG. 2 is a perspective view of a first heat exchanger of a heat exchange unit according to the invention ;
  • FIG. 3 is a cross-section view of a first connector and a second connector of the heat exchange unit according to the invention, the first connector and the second connector being hydraulically connected to each other ;
  • FIG. 4 illustrates a perspective view of one connector of the heat exchange unit according to the invention which participate to hydraulically connect the first heat exchanger to the second heat exchanger.
  • the orientations given are related to the orientation of a heat exchange unit 200 according to the invention.
  • an L, V, T coordinate system is illustrated in which a longitudinal direction is parallel to a longitudinal axis L, a vertical direction is parallel to a vertical axis V and a transversal direction is parallel to a transversal axis T.
  • the longitudinal axis L is perpendicular to both the vertical axis V ant to the transversal axis T
  • the vertical axis V is perpendicular to both the longitudinal axis L and to the transversal axis T
  • the transversal axis T is perpendicular to both the longitudinal axis L and to the vertical axis V.
  • the vertical axis V corresponds to a direction perpendicular to the road on which such vehicle is adapted to run.
  • FIG. 1 illustrates, schematically, a thermal treatment system 100 according to the invention.
  • such thermal treatment system 100 comprises at least one refrigerant fluid circuit no which carries at least one heat exchange unit 200 according to the invention, at least one circulation device 111 adapted to circulates the refrigerant fluid and at least one evaporator 112.
  • a refrigerant fluid RF is adapted to carry and to exchange heat by changing its state.
  • the refrigerant fluid RF can be chosen among 1234YF, Ri34a or CO2.
  • the circulation device 111 adapted to circulate the refrigerant fluid is a compression device and the refrigerant fluid circuit no also comprises at least one expansion device 113.
  • the compression device 111 is adapted to compress the refrigerant fluid RF before it reaches the heat exchange unit 200.
  • the refrigerant fluid RF is adapted to exchange heat with an air flow AF which, as schematically illustrated, crosses the heat exchange unit 200.
  • the heat exchange unit 200 works as a condenser with respect to the refrigerant fluid, that is to say that the refrigerant fluid is cooled and liquified by passing through such heat exchange unit.
  • the refrigerant fluid is adapted to give calories to the air flow AF which crosses said heat exchange unit 200.
  • the cooled refrigerant fluid can then be used to thermally treat another part of the vehicle, such as the passenger compartment or the propulsion system of the vehicle.
  • the refrigerant fluid RF thus exits the heat exchange unit 200 in a liquid state and goes through the expansion device 112 in which its pressure is reduced.
  • the cooled liquid refrigerant fluid RF then reaches the evaporator 112 in which its temperature is raised until the refrigerant fluid evaporates.
  • the refrigerant fluid RF exits the evaporator 112 in a gaseous state and then reaches again the compression device 111 to start a new thermodynamic cycle.
  • the evaporator 112 can be adapted to perform a heat exchange between the refrigerant fluid and an air flow or between the refrigerant fluid and another fluid without departing from the scope of the invention.
  • the heat exchange unit according to the invention can be used as an evaporator.
  • the heat exchange unit 200 can for instance be arranged in a front part of a vehicle and the air flow AF which crosses it can be generated by the movement of the vehicle which carries such heat exchange unit 200.
  • the thermal treatment system 100 of the invention can comprise at least one ventilation device adapted to generate the air flow, for instance when the vehicle is stopped or in dense traffic.
  • FIG. 2 is a perspective view of the heat exchange unit 200 adapted to be crossed by the air flow AF.
  • the heat exchange unit 200 comprises at least a first heat exchanger 210, at least a second heat exchanger 220 and at least one accumulation device 230.
  • the air flow AF is adapted to cross both the first heat exchanger 210 and the second heat exchanger 220.
  • the first heat exchanger 210 and the second heat exchanger 220 have similar shapes.
  • the first heat exchanger 210 mainly extends in a first plan Pi and the second heat exchanger 220 mainly extends in a second plan P2 parallel to the first plan Pi.
  • the first plan Pi and the second plan P2 are both vertical and longitudinal plans, that is to say plans in which the vertical axis V and the longitudinal axis L extend.
  • Each of these heat exchangers 210, 220 comprises at least one heat exchange area 211, 221 wherein the heat exchange between the refrigerant fluid and the air flow AF is performed, and at least one manifold 212, 222 adapted to distribute and/or to collect the refrigerant fluid in and from the respective heat exchange areas 211, 221.
  • each heat exchanger 210, 220 comprises two manifolds 212, 222, among which one entry manifold 212a, 222a adapted to distribute the refrigerant fluid in the heat exchange areas 211, 221 and one exit manifold 212b, 222b adapted to collect the refrigerant fluid from those heat exchange areas 211, 221 once the heat exchange has been performed.
  • each of the manifolds 212, 222 extends along a main axis A, A’ parallel to the vertical axis V and the manifolds 212, 222 of one of the heat exchangers 210, 220 are arranged at two sides of the concerned heat exchanger 210, 220 opposed to one another along the longitudinal axis L.
  • the first heat exchanger’s exit manifold 212b and the second heat exchanger’s entry manifold 222a extend parallel to a main axis A while the first heat exchanger’s entry manifold 212a and the second heat exchanger’s exit manifold 222b extend parallel to another main axis A’.
  • the main axis A and the other main axis A’ are parallel to each other.
  • the manifolds 212, 222 extend perpendicularly to a main direction of circulation of the refrigerant fluid along the heat exchange areas 211, 221.
  • the air flow AF also circulates perpendicularly to a main plan of circulation of the refrigerant fluid along the heat exchange areas 211, 221.
  • the first heat exchanger 210 presents a greater height than the second heat exchanger 220.
  • the “height” of a heat exchanger 210, 220 is a dimension measured along the vertical axis V, between two ends of the concerned heat exchanger, opposed along such vertical axis V.
  • the air flow AF can be virtually separated in a first air flow AFi which crosses only an upper part 213 of the first heat exchanger 210 and in a second air flow AF2 which crosses a lower part 214 of the first heat exchanger 210 and the entire heat exchange are 221 of the second heat exchanger 220.
  • the first air flow AFi thus exchanges heat only with the refrigerant fluid circulating in the upper part 213 of the first heat exchanger 210 while the second air flow AF2 exchanges heat with the refrigerant fluid that circulates in the lower part 214 of the first heat exchanger 210 and with the refrigerant fluid which circulates in the second heat exchanger 220.
  • the second heat exchanger 220 is arranged upstream of the first heat exchanger 210 along the air flow AF, AFi, AF2 direction, and especially along the second air flow AF2 direction.
  • the second air flow AF2 presents a cooler temperature when it enters the second heat exchanger 220 than when it enters the lower part 214 of the first heat exchanger 210.
  • the first heat exchanger 210 is arranged upstream of the second heat exchanger 220 along a direction of circulation of the refrigerant fluid in the heat exchange areas 211, 221.
  • the refrigerant fluid enters the heat exchange unit 200 through the first heat exchanger’s entry manifold 212a, circulates along the first heat exchanger’s heat exchange area 211 until it reaches the first heat exchanger’s exit manifold 212b.
  • the first heat exchanger’s exit manifold 212b is hydraulically connected to the second heat exchanger’s entry manifold 222a thanks to, at least, the accumulation device 230.
  • the refrigerant fluid exiting the first heat exchanger’s exit manifold 212b thus reaches the second heat exchanger’s entry manifold 222a, then circulates along the second heat exchanger’s heat exchange area 221 and finally reaches the second heat exchanger’s exit manifold 222b. It is thus understood that the first heat exchanger’s entry manifold 212a and the second heat exchanger’s exit manifold 222b are both hydraulically connected to the refrigerant fluid circuit of the thermal treatment system earlier described.
  • the refrigerant fluid which circulates in the first heat exchanger 210 is warmer than the refrigerant fluid which circulates in the second heat exchanger 220.
  • such an arrangement permits to maximise the temperature difference between the refrigerant fluid which circulates in the heat exchange areas 211, 221 and the air flow which crosses such heat exchange areas 211, 221, and especially between the second air flow AF2 and the refrigerant fluid which circulates in the lower part 214 of the first heat exchanger 210.
  • the refrigerant fluid enters the first heat exchanger’s entry manifold 212a in a gaseous state and at high pressure.
  • the refrigerant fluid then circulates along the first heat exchanger’s heat exchange area 211 wherein it exchanges heat with the airflow AF. More particularly, the gaseous refrigerant fluid first circulates in the upper part 213 of the first heat exchanger 210 wherein it exchanges heat with the first airflow AFi, then it reaches the lower part 214 of the first heat exchanger 210 wherein it exchanges heat with the second airflow AF2. As a result of the heat exchange operated within the upper part 21 of the first heat exchanger 210, the refrigerant fluid may reach the lower part 214 of the first heat exchanger 210 in a biphasic state.
  • the refrigerant fluid finishes its condensation within the lower part 214 of the first heat exchanger 210, that is to say by exchanging heat with the second airflow AF2 in order to be in a liquid state when it reaches the second heat exchanger 220.
  • the refrigerant fluid keeps exchanging heat with the second air flow AF2.
  • the second heat exchanger 220 is arranged upstream the first heat exchanger 210 along the main direction of circulation of the air flow AF, and particularly along the direction of circulation of the second air flow AF2. As a consequence, the heat exchange between the refrigerant fluid which circulates in the second heat exchanger 220 results in a subcooling of the refrigerant fluid.
  • the second heat exchanger 220 of heat exchange unit 200 is adapted to make the refrigerant fluid’s temperature drop under its liquefaction temperature.
  • such subcooling permits to improve the global efficiency of the refrigerant fluid circuit which comprises the heat exchange unit 200 of the invention.
  • the refrigerant fluid is temporarily stocked in the accumulation device 230.
  • this accumulation device 230 is adapted to contain the circulating refrigerant fluid in order to compensate the refrigerant fluid leaks which are unavoidable during the vehicle’s life cycle.
  • this accumulation device 230 extends along a main direction Y parallel to the vertical axis V, that is to say parallel to the main axis of extension A, A’ of the manifolds of both the first heat exchanger 210 and the second heat exchanger 220.
  • This accumulation device 230 is hydraulically connected to the first heat exchanger 210, and particularly to the exit manifold 212b of this first heat exchanger 210, and to the second heat exchanger 220, and particularly to the entry manifold 222a of this second heat exchanger 220.
  • a first connector 240 hydraulically connects the first heat exchanger’s exit manifold 212b to the accumulation device 230 and a second connector 250 hydraulically connects the first connector 240 to the second heat exchanger’s entry manifold 222a.
  • the first connector 240 can be brazed on the heat exchange unit 200, and especially to, at least, the first heat exchanger’s exit manifold 212b, while the second connector 250 is brazed only to the second heat exchanger’s entry manifold 222a and screwed to the first connector 240.
  • the second connector 250 and the second heat exchanger 220 can be replaced without having to also replace the rest of the heat exchange unit 200.
  • the first connector 240 comprises at least a first channel 241 and at least a second channel 242.
  • Those channels 241, 242 are schematically represented in dotted lines.
  • the first channel 241 is hydraulically connected to the first heat exchanger’s exit manifold 212b on one hand and to the accumulation device 230 on the other hand while the second channel 242 is hydraulically connected to the accumulation device 230 on one hand and to the second connector 250 on the other hand.
  • the first channel 241 is connected to an inlet of the accumulation device 230 while the second channel 242 is connected to an outlet of this accumulation device 230.
  • the second connector 250 comprises one conduit 251, especially a single conduit 251, also represented with dotted lines on figure 2. As illustrated, this conduit 251 is hydraulically connected to the second channel 242 of the first connector 240 and to the second heat exchanger’s entry manifold 222a.
  • the accumulation device 230 is arranged on a side of the heat exchangers 210, 220 and extends parallel to the vertical axis V of the illustrated coordinate system. Particularly, the accumulation device 230 extends on the same side of the heat exchangers 210, 220 than the first heat exchanger’s exit manifold 212b and the second heat exchanger’s entry manifold 222a.
  • the second channel 242 of the first connector 240 is connected to a lower part 231 of the accumulation device 230, that is to say to a part of this accumulation device 230 which faces the second heat exchanger 220. Once mounted on the intended vehicle, the second heat exchanger 220 is closer to the road on which said vehicle runs than the first heat exchanger 210.
  • the invention uses the gravity to ensure that the second channel 242 of the first connector 240 is always arranged under the level of refrigerant fluid in a liquid state contained in the accumulation device 230.
  • this arrangement ensures the continuous supplying of the second heat exchanger 220 with refrigerant fluid in a liquid state.
  • the channels 241, 242 and the conduit 251 are for instance also represented on figure 3 which is a cross-section view of the first connector 240 and the second connector 250, this cross-section view being realized thanks to a vertical and transversal plan, that is to say a plan in which both the vertical axis V and the transversal axis T are included.
  • the second connector 250 is screwed to the first connector 240.
  • at least one hole 243, 257 is arranged in both the first connector 240 and the second connector 250, each of those holes 243, 257 being adapted to receive one screw 260.
  • the hole 243 arranged in the first connector 243 and the hole 257 arranged in the second connector 257 face each other and receive the same screw 260 once the connectors 240, 250 are assembled.
  • the hole 243 arranged in the first connector 240 is a blind hole while the hole 257 arranged in the second connector 250 traverses said second connector 250.
  • the second connector 250 also comprises at least one connecting plug 258 which at least partially extends in an orifice 244 arranged in the first connector 240.
  • this connecting plug 258 extends parallel to the transversal axis T and comes out on the second channel 242 of the first connector 240 on one hand and on the conduit 251 of the second connector 250 on another hand.
  • this connecting plug 258 hydraulically connects the first connector 240 to the second connector 250 by connecting the first connector’s second channel 242 to the second connector’s conduit 251.
  • the second connector 250 has a general parallel epipedic shape, thus comprising at least one front face 252, one rear face 253 linked together thanks to one first side face 254 and one second side face 255. At least one cut 256 is formed in the front face 252 in such a way that second connector 250 presents an upper part 250a and a lower part 250b, the upper part 250a presenting a width wi smaller than a width w2 of the lower part 250b. Those width wi, w2 are both measured along the transversal axis T, between the front face 252 and the rear face 253 of the second connector 250.
  • a hole 257 adapted to receive the screw is arranged in the second connector 250.
  • this through-hole 257 is arranged in the upper part 250a of the second connector 250, and the cut 256 is advantageously adapted to receive the screw head.
  • the rear face 253 of this second connector 250 carries the connecting plug 258 adapted to be received in the orifice formed in the first connector.
  • the connecting plug 258 extends parallel to the transversal axis T but it is understood that it is only an example of how to execute the invention and that this connecting plug 258 could present another orientation without departing from the scope of the invention.
  • This connecting plug 258 is thus connected to the second channel of the first connector on one hand and to the conduit previously described on the other hand. Although it is not shown on figure 4, this conduit comes out on the second side face 255 of the second connector 250. As partially illustrated, this second side face 255 comprises at least one rail 255a adapted to encompass the second heat exchanger’s entry manifold, said second side face 255 being in contact with said second heat exchanger’s entry manifold.
  • the present invention therefore provides a new architecture of a heat exchange unit adapted to be received in a front part of a vehicle, such heat exchange unit being less bulky than the heat exchange units known from prior art.
  • the invention cannot be limited to the means and configurations described and illustrated herein, and it also extends to any equivalent means or configurations and to any technically operative combination of such means.
  • the shape and arrangement of the connectors and of the heat exchangers can be modified insofar as they fulfil the functionalities described in the present document.

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  • 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 une unité d'échange de chaleur (200) pour un véhicule, comprenant au moins un premier échangeur de chaleur (210) conçu pour effectuer un échange de chaleur entre un fluide frigorigène et un flux d'air (AF, AF1, AF2), au moins un second échangeur de chaleur (220) conçu pour effectuer un échange de chaleur entre le fluide frigorigène et le flux d'air (AF, AF1, AF2), le premier échangeur de chaleur (210) étant disposé en aval du second échangeur de chaleur (220) le long de la direction du flux d'air (AF, AF1, AF2), l'unité d'échange de chaleur (200) comprenant au moins un dispositif d'accumulation (230) en communication hydraulique à la fois avec le premier échangeur de chaleur (210) et le second échangeur de chaleur (220), au moins un premier raccord (240) et un second raccord (250), le premier raccord (240) étant en communication hydraulique avec le dispositif d'accumulation (230) et le second raccord (250) et le second raccord (250) étant en communication hydraulique avec le premier raccord (240) et le second échangeur de chaleur (220), au moins le second raccord (250) étant vissé au premier raccord (240).
PCT/EP2021/066467 2020-07-08 2021-06-17 Unité d'échange de chaleur pour véhicule WO2022008197A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20184699.5 2020-07-08
EP20184699.5A EP3936809A1 (fr) 2020-07-08 2020-07-08 Échangeur de chaleur double comportant un dispositif de séchage de récepteur

Publications (1)

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WO2022008197A1 true WO2022008197A1 (fr) 2022-01-13

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060118289A1 (en) * 2003-01-20 2006-06-08 Behr Lorraine S.A.R.L. Heat exchanger comprising a connection flange that is joined to the manifold
WO2011120972A1 (fr) * 2010-03-31 2011-10-06 Valeo Systemes Thermiques Echangeur de chaleur muni d'une bride de raccordement
US20110259042A1 (en) * 2010-04-05 2011-10-27 Denso Corporation Evaporator unit
US20150027163A1 (en) * 2012-03-06 2015-01-29 Denso Corporation Refrigerant evaporator
KR20160035825A (ko) * 2014-09-24 2016-04-01 한온시스템 주식회사 라디에이터 및 콘덴서 조립체
FR3088712A1 (fr) * 2018-11-16 2020-05-22 Valeo Systemes Thermiques Bride de connexion pour thermique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060118289A1 (en) * 2003-01-20 2006-06-08 Behr Lorraine S.A.R.L. Heat exchanger comprising a connection flange that is joined to the manifold
WO2011120972A1 (fr) * 2010-03-31 2011-10-06 Valeo Systemes Thermiques Echangeur de chaleur muni d'une bride de raccordement
US20110259042A1 (en) * 2010-04-05 2011-10-27 Denso Corporation Evaporator unit
US20150027163A1 (en) * 2012-03-06 2015-01-29 Denso Corporation Refrigerant evaporator
KR20160035825A (ko) * 2014-09-24 2016-04-01 한온시스템 주식회사 라디에이터 및 콘덴서 조립체
FR3088712A1 (fr) * 2018-11-16 2020-05-22 Valeo Systemes Thermiques Bride de connexion pour thermique

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