EP3671093B1 - Système d'échangeur de chaleur à plusieurs circuits - Google Patents

Système d'échangeur de chaleur à plusieurs circuits Download PDF

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Publication number
EP3671093B1
EP3671093B1 EP18461648.0A EP18461648A EP3671093B1 EP 3671093 B1 EP3671093 B1 EP 3671093B1 EP 18461648 A EP18461648 A EP 18461648A EP 3671093 B1 EP3671093 B1 EP 3671093B1
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EP
European Patent Office
Prior art keywords
heat exchanger
inlet
tubular elements
refrigerant
exchanger system
Prior art date
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Active
Application number
EP18461648.0A
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German (de)
English (en)
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EP3671093A1 (fr
Inventor
Dariusz BUREK
Maciej PEDRAS
Grzegorz Romanski
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Valeo Autosystemy Sp zoo
Original Assignee
Valeo Autosystemy Sp zoo
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Priority to EP18461648.0A priority Critical patent/EP3671093B1/fr
Priority to PCT/EP2019/085874 priority patent/WO2020127440A1/fr
Publication of EP3671093A1 publication Critical patent/EP3671093A1/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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/0056—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • 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
    • F28D2021/0043—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for fuel cells
    • 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 a heat exchanger system, particularly, the present invention relates to a multi-circuit heat exchanger system for vehicles.
  • HVAC Heating Ventilation and Air Conditioning
  • the multi-circuit heat exchanger involves at least three heat exchange media, two coolants and one refrigerant, and configures refrigerant circuit disposed between the coolant circuits.
  • the coolant circuits facilitate cooling of coolants flowing there-through and the refrigerant circuit facilitates in condensing of a refrigerant fluid such as for example R1234yf or cooling of another refrigerant fluid such as for example R744, particularly, high pressure refrigerant fluid flowing through the refrigerant circuit. More specifically, depending upon whether the refrigerant flowing through the refrigerant circuit is R744 or R1234yf, the refrigerant is either cooled without phase change or condensed with phase change respectively.
  • the R744 refrigerant in case R744 refrigerant is flowing through the refrigerant circuit, the R744 refrigerant is cooled without undergoing phase change, i.e. the R744 refrigerant remains in gas phase and the refrigerant circuit acts as a gas cooler, whereas in case the R1234yf is flowing through the refrigerant circuit, the R1234yf undergoes condensation, phase change of R1234yf from gas to liquid phase occurs and the refrigerant circuit acts as the condenser of the air conditioning system.
  • cold refrigerant flowing through the refrigerant circuit can be used for simultaneously cooling two different coolants flowing through the two different coolant circuits.
  • the cooled coolants received from the two different coolant circuits can be used differently. For example, one coolant can be used for battery cooling.
  • the coolants after extracting heat from the battery pack are cooled by the refrigerant from the refrigerant circuit for ensuring a regular supply of cool coolant to the battery pack.
  • the regular cooling of the battery pack prevents damage thereof due to over-heating and also ensures efficient operation thereof.
  • the other coolant can be used for other applications such as facilitating cooling of the air supplied to vehicle cabin or for cooling power electronics based elements such as controllers.
  • the high pressure refrigerant operating at high pressures up to 170 bars reject heat to the coolants flowing through the coolant circuits for achieving condensation /gas cooling of the high pressure refrigerant.
  • the high pressure refrigerant loses heat energy by heat exchange with the coolants and either gets condensed into liquid phase for R1234yf or gets cooled while still remaining in gas phase (for R744). Thereafter, the high pressure, treated refrigerant passes through an expansion valve, which further cools the liquid refrigerant / cooled gas due to lowering of the refrigerant pressure.
  • the low pressure refrigerant liquid and flash gas leaving the expansion valve flows at proper rate through the evaporator and the compressor to complete the air conditioning cycle.
  • the operating pressure of the refrigerant circuit depends on the refrigerant flowing through the refrigerant circuit in both liquid and gaseous state.
  • the condenser operates at an operating pressure of up to 25 bars.
  • the refrigerant flowing through the refrigerant circuit is a high pressure refrigerant, is particularly, R744, the refrigerant circuit operates as the gas cooler (instead of the condenser) and operates at a substantially higher operating pressure as high as up to 170 bars.
  • the conventional multi-circuit heat exchanger 10 is generally formed of plurality of corrugated plates 12a and 12b that are stacked over each other in a pre-defined configuration as illustrated in FIGURE 1 , to define a refrigerant circuit 20a and coolant circuits 20b and 20c. More specifically, the refrigerant flows though passages configured between the first and second corrugated plates 12a and 12b by joining the first and second corrugated plates 12a and 12b at specific points to define the refrigerant circuit 20a.
  • the multi-circuit heat exchanger 10 is operating as the condenser (R1234yf) / gas cooler (R744), as the refrigerant flows through the refrigerant circuit 20a , the refrigerant loses heat energy by heat exchange with the first and second coolants flowing above and below the corrugated plates 12a and 12b respectively defining the coolant circuits 20b and 20c, and as such the refrigerant gets condensed to liquid phase (R1234yf) or gets cooled while still remaining in gas state (R744).
  • the multi-circuit heat exchanger 10 In case the multi-circuit heat exchanger 10 is operating as the water chiller, the first and the second coolants flowing over and below the first and second corrugated plates 12a and 12b respectively are cooled by the refrigerant flowing between the first and the second corrugated plates 12a and 12b.
  • the conventional multi-circuit heat exchanger 10 configures circulation paths for the first and second coolants and the refrigerant for facilitating heat exchange between the coolants and the refrigerant.
  • the heat exchange between the refrigerant and the coolants for condensation / cooling of the refrigerant or cooling of the coolant is not effective.
  • the refrigerant flowing through the passages configured by joining the first and second corrugated plates 12a and 12b at specific points is high pressure refrigerant, particularly, in case the refrigerant is R744 (CO 2 ) having operating pressures as high as up to 170 bars there are chances of bursting and separation of the first and second corrugated plates 12a and 12b.
  • Such bursting may cause pressure drop in the condenser / gas cooler circuit 20a and may render the conventional multi-circuit heat exchanger 10 in-effective.
  • such bursting may cause irreversible damage to the multi-circuit heat exchanger 10 and render the same useless.
  • Such bursting may also cause mixing of the refrigerant with the coolant, thereby rendering both the coolants and the refrigerant useless.
  • Such bursting may also be cause of accidents and may render the multi-circuit heat exchanger 10 unsafe, requiring frequent maintenance and unreliable.
  • a multi-circuit heat exchanger according to the preamble of claim 1 is disclosed in US 2010/294644 A
  • a multi-circuit heat exchanger system that configures separate and independent one refrigerant circuit and two coolant circuits for facilitating effective heat exchange between the refrigerant and the coolant.
  • a multi-circuit heat exchanger system that configures separate and independent circulation paths for flow of a first coolant, a second coolant and a high pressure refrigerant there through such that elements of the multi-circuit heat exchanger configuring a refrigerant circuit sandwiched between independent coolant circuits are able to withstand high operating pressures of the high pressure refrigerant flowing there through.
  • a multi-circuit heat exchanger system that achieves effective direct heat exchange between the high pressure refrigerant flowing through a refrigerant circuit and a first and a second coolant flowing through respective separate coolant circuits for achieving cooling of the first and second coolants. Also, there is a need for a multi-circuit heat exchanger system that configures separate and independent refrigerant circuit sandwiched between independent coolant circuits so that mixing of high pressure refrigerant flowing through the refrigerant circuit with a first and a second coolant flowing through the respective coolant circuits is eliminated. Also there is a need for a multi-circuit heat exchanger system that is safe, requires less maintenance and exhibits extended service life and reliability.
  • An object of the present invention is to provide a multi-circuit heat exchanger system that configures separate and independent one refrigerant circuit and two coolant circuits for facilitating effective heat exchange between the refrigerant and the coolants for functioning either as a Water Cooled Gas Cooler or Gas Cooled Water Chiller.
  • Another object of the present invention is to provide a multi-circuit heat exchanger system that obviates the drawbacks associated with conventional multi-circuit heat exchanger that use only corrugated plates for configuring heat exchange passages irrespective of whether heat exchange medium is high pressure medium.
  • Still another object of the present invention is to provide such a multi-circuit heat exchanger system that elements of the multi-circuit heat exchanger system configuring a refrigerant circuit are sandwiched between and in contact with plates configuring the separate coolant or chiller-circuits and are able to withstand high operating pressures of the high pressure refrigerant flowing there through.
  • Yet another object of the present invention is to provide a multi-circuit heat exchanger system that configures separate and independent circulation paths for a first coolant, a second coolant and a refrigerant so that mixing of high pressure refrigerant flowing through a refrigerant circuit with a first and a second coolant flowing through the respective coolant circuits is eliminated.
  • Another object of the present invention is to provide a multi-circuit heat exchanger system that configures heat exchange between refrigerant and first coolant, refrigerant and second coolant and between the first coolant and the second coolant.
  • Yet another object of the present invention is to provide a multi-circuit heat exchanger system that exhibits enhanced heat exchange efficiency and performance.
  • Still another object of the present invention is to provide a multi-circuit heat exchanger system that is robust in construction, reliable and ensures safe operation.
  • Another object of the present invention is to provide a multi-circuit heat exchanger system that is less prone to failures and requires less maintenance.
  • Yet another object of the present invention is to provide a multi-circuit heat exchanger system that exhibits better flow control of heat exchange fluids flowing there-through.
  • some elements or parameters may be indexed, such as a first element and a second element.
  • this indexation is only meant to differentiate and name elements which are similar but not identical. No idea of priority should be inferred from such indexation, as these terms may be switched without betraying the invention. Additionally, this indexation does not imply any order in mounting or use of the elements of the invention.
  • a multi-circuit heat exchanger system hereinafter referred to as a "system” is disclosed in accordance with an embodiment of the present invention.
  • the “system” includes a plurality of sets of tubular elements to configure fluid flow passages for a refrigerant and a plurality of first cooling panels and second cooling panels to configure independent fluid flow passages for a first coolant and a second coolant respectively, wherein the first cooling panels and the second cooling panels are so arranged with respect to the sets of tubular elements that at least one set of tubular elements is sandwiched between each of the adjacent first cooling panels and second cooling panels.
  • the multi-circuit heat exchanger system includes an inlet manifold and an outlet manifold of a first manifold that are connected by at least one set of tubular elements configuring fluid flow passages for the refrigerant.
  • tubular elements of each set of tubular elements are divided into inlet tubular elements and the corresponding outlet tubular elements that are interconnected to each other by an intermediate manifold.
  • each tubular element of the set of tubular elements withstands high operating pressures of a high pressure refrigerant flowing there through.
  • each tubular element of the set of tubular elements receives R744 as refrigerant and withstands operating pressures in range of 150 to 190 bars.
  • the multi-circuit heat exchanger system includes a first pair of inlet and outlet columns connected by at least one fluid flow passage configured by at least one of the first cooling panels.
  • the multi-circuit heat exchanger system includes a second pair of inlet and outlet columns connected by at least one fluid flow passage configured by at least one of the second cooling panels, the fluid flow passages configured by the second cooling panels are independent from fluid flow passages configured by the first cooling panels.
  • the inlet and outlet columns of the first pair of inlet and outlet columns are configured at opposite front corners of the multi-circuit heat exchanger system near the first manifold and interconnect all of the first cooling panels configuring the multi-circuit heat exchanger system.
  • the inlet and outlet columns of the second pair of inlet and outlet columns are configured at opposite rear corners of the multi-circuit heat exchanger system near the intermediate manifold and interconnect all of the second cooling panels configuring the multi-circuit heat exchanger system.
  • the inlet manifold further includes at least one inlet and the outlet manifold further includes at least one outlet, the at least one inlet receives refrigerant to be treated to facilitate distribution of the refrigerant to the inlet tubular elements via the inlet manifold, whereas the at least one outlet delivers out the treated refrigerant received by the outlet manifold from the outlet tubular elements.
  • the first manifold includes at least one plate with a first set of slots and a second set of slots configured thereon, at least one distribution column and at least one collection column.
  • the first set of slots in conjunction with the at least one distribution column facilitates distribution of refrigerant received by the inlet manifold to the inlet tubular elements and the second set of slots in conjunction with the at least one collection column facilitates collection of refrigerant from the outlet tubular elements into the outlet manifold.
  • the intermediate manifold includes a cover, at least one plate with a first set of slots and a second set of slots configured thereon.
  • the first set of slots facilitates receiving refrigerant from the inlet tubular elements and the second set of slots facilitates delivering the refrigerant received from said first set of slots to the outlet tubular elements.
  • each of the first and second cooling panels respectively withstands low operating pressures (0.5 to 3 bars) of the first and second coolants flowing there-through.
  • each of the first and second cooling panels receives water glycol mixture as the first coolant and the second coolant respectively and withstands operating pressures in range of 0.5 to 3 bars.
  • each of the first cooling panels is formed by joining preferably identical half plates with an array of flow restrictors disposed between the half plates.
  • each of the second cooling panels is formed by joining preferably identical half plates with the flow restrictors disposed between the half plates.
  • each column of the first pair of inlet and outlet columns is configured by assembling and joining connector elements configured on adjacent first cooling panels by brazing.
  • Each connector element includes a male collar and a female collar, wherein the male collar is received in a female collar of a first adjacent connector element and the female collar receives a male collar of a second adjacent connector element.
  • each column of the second pair of inlet and outlet columns is configured by assembling and joining connector elements configured on adjacent second cooling panels by brazing.
  • Each connector element includes a male collar and a female collar, wherein the female collar receives a male collar of a first adjacent connector element and the male collar is received in a female collar of a second adjacent connector element.
  • a multi-circuit heat exchanger system that configures separate and independent coolant circuits and a refrigerant circuit for operating either as a water chiller for a battery cooling system or as a water cooled gas cooler for a Heating Ventilation and Air Conditioning (HVAC) system of a vehicle respectively is disclosed. More specifically, as per the disclosure made in the current specification, the multi-circuit heat exchanger system configures separate independent heat exchange circuits for facilitating efficient heat exchange between a refrigerant, particularly a high pressure refrigerant and two coolants.
  • the multi-circuit heat exchanger system of the present invention is also applicable for use in other systems and applications not limited for use in vehicle only.
  • such multi-circuit heat exchanger system are also applicable in any other systems or applications in which the multi-circuit heat exchanger system is required to configure separate independent heat exchange circuits for facilitating efficient heat exchange between different media, and wherein one of the heat exchange media is a high pressure medium and the heat exchange element configuring heat exchange circuit for such high pressure medium is required to withstand high operating pressures.
  • the “system” 100 includes a plurality of sets of tubular elements 102a, 102b, first and second cooling panels 104 and 106 respectively, a first manifold 130, an intermediate manifold 140 and an adaptor element 150.
  • the plurality of sets of tubular elements 102a , 102b configure fluid flow passages for a refrigerant, particularly, a high pressure refrigerant to facilitate heat exchange and also connect an inlet manifold 130a and an outlet manifold 130b of the first manifold 130 that in turn facilitate ingress and egress of high pressure refrigerant in and out of the "system" 100.
  • the inlet manifold 130a and the outlet manifold 130b of the first manifold 130 are connected by at least one set of tubular elements 102a, 102b configuring fluid flow passages for the high pressure refrigerant.
  • the tubular elements of each set of tubular elements are divided into the inlet tubular elements 102a and the corresponding outlet tubular elements 102b that are interconnected to each other either directly or indirectly by the intermediate manifold 140.
  • the inlet tubular elements 102a receive high pressure refrigerant-from the inlet manifold 130a and the outlet tubular elements 102b deliver high pressure refrigerant to the outlet manifold 130b.
  • the inlet tubular elements 102a configure a portion of fluid flow passage for high pressure refrigerant from the inlet manifold 130a to the intermediate manifold 140 and the outlet tubular elements 102b configure a reverse flow passage for high pressure refrigerant from the intermediate manifold 140 to the outlet manifold 130b.
  • Such configuration of the inlet and outlet tubular elements 102a and 102b of each set of tubular elements configure a fluid flow path connecting the inlet manifold 130a to the outlet manifold 130b. Similar sets of tubular elements configure numerous fluid flow paths connecting the inlet manifold 130a to the outlet manifold 130b.
  • the inlet manifold 130a and the outlet manifold 130b are connected by at least one tubular element configuring a continuous fluid flow path connecting the inlet manifold 130a and the outlet manifold 130b.
  • a plurality of continuous tubular elements configures continuous fluid flow paths connecting the inlet manifold 130a to the outlet manifold 130b.
  • FIGURE 3 illustrates an isometric view of the "system" 100 without the first manifold 130 and the intermediate manifold 140 for the purpose of clearly depicting the arrangement of inlet and outlet tubular elements 102a and 102b with respect to the first and the second cooling panels 104 and 106 respectively.
  • FIGURE 4a of the accompanying drawings depicts arrangement of adjacent sets of tubular elements 102a , 102b, for example in form of multi-port panels with respect to the adjacent first and second cooling panels 104 and 106.
  • the tubular elements 102a , 102b are multi-port panels formed by either one of extrusion and folding.
  • the adjacent sets of tubular elements 102a , 102b in the form of multi port panels are depicted converging at both the extreme ends thereof while one of the adjacent sets of the of tubular elements 102a , 102b is depicted sandwiched between adjacent first and second cooling panels 104 and 106.
  • the tubular elements 102a , 102b of the set are in contact with the first and second cooling panels 104 and 106.
  • Such arrangement of the tubular elements 102a and 102b with respect to the adjacent first and second cooling panels 104 and 106 facilitates better heat exchange between the high pressure refrigerant flowing through the tubular elements 102a , 102b and the first and second coolants flowing through the first and second cooling panels 104 and 106 respectively.
  • the converging extreme ends of the adjacent sets of tubular elements 102a , 102b are received in slots configured on at least one plate 134 of the first manifold 130.
  • Such arrangement facilitates in packaging of the various elements of the "system” 100 in limited space, thereby achieving a compact configuration of the "system” 100.
  • FIGURE 4b of the accompanying drawings illustrate an exploded view depicting the arrangement, wherein one set of tubular elements including inlet and outlet tubular elements 102a , 102b is depicted sandwiched between the adjacent first and the second cooling panels 104 and 106 respectively.
  • more than one set of the tubular elements 102a , 102b can also be disposed between or sandwiched between each of the adjacent first and second cooling panels 104 and 106, such that the tubular elements 102a , 102b are in direct contact with the adjacent first and second cooling panels 104 and 106 for facilitating direct heat exchange between a first coolant flowing in the first cooling panels 104 and high pressure refrigerant flowing through the tubular elements 102a , 102b, separate direct heat exchange between a second coolant flowing in the second cooling panels 106 and high pressure refrigerant flowing through the tubular elements 102a, 102b and indirect heat exchange between the first coolant and the second coolant flowing in the adjacent first and second cooling panels 104 and 106 respectively via the high pressure refrigerant flowing through the tubular elements 102a, 102b disposed between adjacent first and second cooling panels 104 and 106.
  • the flow of the high pressure refrigerant through the inlet tubular elements 102a and flow of first coolant flowing in the first cooling panels 104 is either parallel flow or counter flow.
  • the flow of the high pressure refrigerant through the inlet tubular elements 102a and flow of second coolant flowing in the second cooling panels 106 is either parallel flow or counter flow.
  • Such configuration results in cooling of the first and second coolants when the multi-circuit heat exchanger system 100 is operating as chiller and condensation (R1234yf) / cooling (R744) of the high pressure refrigerant when the multi-circuit heat exchanger system 100 is operating as condenser / gas cooler.
  • the refrigerant flowing through the refrigerant circuit is R744 or R1234yf
  • the refrigerant is either cooled without phase change or condensed with phase change respectively.
  • the R744 refrigerant is cooled without undergoing phase change, i.e. the R744 refrigerant remains in gas phase and the refrigerant circuit acts as a gas cooler
  • the R1234yf undergoes condensation and the refrigerant circuit acts as the condenser of the air conditioning system.
  • the present invention is not limited to the configuration of the flow between the refrigerant and the two coolants as far as there is efficient heat transfer between the refrigerant and the two coolants.
  • the inlet tubular elements 102a and the outlet tubular elements 102b are receives and facilitates fluid flow there through of a high pressure refrigerant such as for example, R744 (CO2) refrigerant that has an operating pressure up to 170 bars.
  • a high pressure refrigerant such as for example, R744 (CO2) refrigerant that has an operating pressure up to 170 bars.
  • the inlet tubular elements 102a and the outlet tubular elements 102b should be capable of withstanding such high pressures and as such the inlet tubular elements 102a and the outlet tubular elements 102b are for example configured of micro multiport panels or extruded tubes as depicted in FIGURE 5a of the accompanying drawings that in turn are configured by either one of extrusion and folding.
  • the inlet and outlet tubular elements 102a and 102b respectively are able to withstand high operating pressures of the high pressure refrigerant such as for example, R744 (CO 2 ) flowing there through without any danger of bursting.
  • the inlet and outlet tubular elements 102a and 102b configured of micro multiport panels that are capable of receiving R744 as refrigerant and withstanding high operating pressures in range of 150 to 190 bars.
  • Such a configuration of the inlet and outlet tubular elements 102a and 102b configured of micro multiport panels renders the inlet and outlet tubular elements 102a and 102b lighter in weight, safe and compact.
  • the inlet and outlet tubular elements 102a and 102b of such configuration exhibits enhanced heat transfer efficiency, energy and material saving potential and service life over regular tube counterparts.
  • the inlet and outlet tubular elements 102a and 102b configured of micro multiport panels are compact, these can be conveniently packaged in limited space between adjacent first and second cooling panels 104 and 106.
  • the operating pressure of the tubular elements 102a and 102b defining the refrigerant circuit is based on the refrigerant selected.
  • the operating pressure of the tubular elements 102a and 102b defining the refrigerant circuit is in the range of 3-25 bars (absolute)
  • the operating pressure of the tubular elements 102a and 102b defining the refrigerant circuit is up to 170 bars (absolute).
  • present invention is not limited to use of any particular refrigerant in the tubular elements 102a and 102b of the multi-circuit heat exchanger system 100 of the present invention and any high pressure refrigerant can be used.
  • the first and second cooling panels 104 and 106 configure independent fluid flow passages for first and second coolants respectively, wherein the first and the second cooling panels 104 and 106 are so arranged with respect to the sets of tubular elements 102a and 102b that at least one set of the inlet and the outlet tubular elements 102a , 102b is sandwiched between each of the adjacent first and second cooling panels 104 and 106 as illustrated in the FIGURE 4b .
  • the first and second coolants are water glycol mixtures of same or different concentrations or composition, for example water-glycol mixture having different percentage of water and glycol. With use of water glycol mixture, the operating pressure of the first and the second cooling panels 104 and 106 is up to 3 bars (absolute).
  • present invention is not limited to use of any particular coolants.
  • cold refrigerant flowing through the refrigerant circuit can be used for cooling the different coolants flowing through the two different coolant circuits either one at a time or simultaneously.
  • the cooled coolants received from the two different coolant circuits can be used differently, for example, one coolant can be used for battery cooling while the other coolant can be used for other applications such as at least one of battery cooling, facilitating cooling the air supplied to vehicle cabin and cooling power electronics based elements such as controllers.
  • the coolants in the first and second cooling panels 104 and 106 can be of same or different compositions.
  • Each of the first cooling panels 104 is formed by joining identical half plates 104a and 104b with an array of flow restrictors 120 disposed between the half plates 104a and 104b.
  • FIGURE 5b of the accompanying drawings depicts an isometric sectional view of the first cooling panel 104, wherein internal details thereof with the array of flow restrictors 120 disposed within the first cooling panel 104 are also depicted.
  • each one of the first cooling panels 104 is configured with at least one fluid flow passage to facilitate flow of the first coolant there through and heat exchange between the first coolant flowing there through and high pressure refrigerant flowing through the tubular elements 102a , 102b disposed adjacent thereto.
  • the first cooling panels 104 also connect a first pair of inlet and outlet columns 108a and 108b that facilitate ingress and egress of first coolant in and out of the "system” 100.
  • the first coolant enters inside the "system” 100 from the first inlet column 108a
  • the first coolant's entry inside the "system” is referred to by arrow C1 in and leaves the "system” 100 from the outlet column 108b, referred to arrow C1 out .
  • the first coolant is distributed among and flows through the heat exchange passages configured by the first cooling panels 104 connecting the first pair of inlet and outlet columns 108a and 108b.
  • the flow restrictors 120 retard fluid flow through the at least one fluid flow passage configured within each of the first cooling panels 104 to enhance heat transfer.
  • each of the second cooling panels 106 is formed by joining identical half plates 106a and 106b with the flow restrictors 120 disposed between the half plates 106a and 106b.
  • FIGURE 5b of the accompanying drawings also depicts an isometric sectional view of the second cooling panel 106, wherein internal details thereof with the array of flow restrictors 120 disposed within the second cooling panel 106 are also depicted.
  • each of the second cooling panels 106 is configured with at least one fluid flow passage independent from fluid flow passages associated with and configured by the first cooling panels 104.
  • the fluid flow passages associated with the second cooling panels 106 facilitate heat exchange between the second coolant flowing there through and high pressure refrigerant flowing through the tubular elements 102a , 102b disposed adjacent to the second cooling panels 106.
  • the second cooling panels 106 also connect a second pair of inlet and outlet columns 110a and 110b that facilitate ingress and egress of the second coolant in and out of the "system” 100.
  • the second coolant enters inside the "system” 100 from the second inlet column 110a
  • the second coolant's entry in the "system” 100 is referred to by arrow C2in and leaves the "system” 100 from the outlet column 110b, referred to by arrow C2 out .
  • the second coolant is distributed among and flows through the heat exchange passages configured by the second cooling panels 106 connecting the second pair of inlet and outlet columns 110a and 110b.
  • the flow restrictors 120 retard fluid flow through the at least one fluid flow passage configured within each of the second cooling panels 106 and enhance heat transfer.
  • Each of the first and second cooling panels 104 and 106 is capable of withstanding low pressures in range of 0.5 to 3 bars.
  • FIGURE 6 of the accompanying drawings illustrates a sectional view of the "system" 100 along a sectional plane passing through center of each column of the first pair of inlet and outlet columns 108a and 108b. Also, is depicted first set of fluid flow passages configured by the first cooling panels 104 for facilitating flow of first coolant there-through. Further is depicted the first pair of inlet and outlet columns 108a and 108b connected with the first set of fluid flow passages configured by at least one of the first cooling panels 104 for facilitating ingress and egress of first coolant in and out of the first cooling panels 104 of the "system" 100.
  • the inlet and outlet columns 108a and 108b of the first pair of inlet and outlet columns are configured at opposite front corners of the multi-circuit heat exchanger system 100 near the first manifold 130 and interconnect all of the first cooling panels 104 configuring the multi-circuit heat exchanger system 100.
  • connection between adjacent connector elements 105, 105a and 105b configured on adjacent first cooling panels 104 for configuring the first pair of inlet and outlet columns 108a and 108b is depicted in an enlarged view.
  • each column of the first pair of inlet and outlet columns 108a and 108b is configured by assembling and joining connector elements configured on adjacent first cooling panels of all of the first cooling panels 104 by brazing.
  • each connector element 105 includes a male collar 105m and a female collar 105f, wherein the male collar 105m is received in a female collar 105fa of a first connector element 105a configured on an adjacent first cooling panel 104 and the female collar 105f receives male collar 105mb of a second connector element 105b configured on another adjacent first cooling panel 104.
  • the connector elements configured on the subsequent adjacent first cooling panels are also assembled to facilitate configuring of the first pair of inlet and outlet columns 108a and 108b.
  • the connector elements can be joined by a single step brazing process to configure the first pair of inlet and outlet columns 108a and 108b, thereby making the manufacturing of the "system" 100 both convenient and quick.
  • FIGURE 7 of the accompanying drawings illustrates a sectional view of the "system" 100 along a sectional plane passing through centre of each column of the second pair of inlet and outlet columns 110a and 110b. Also is depicted a second set of fluid flow passages configured by at least one of the second cooling panels 106 for facilitating flow of second coolant there through. Further, is depicted the second pair of inlet and outlet columns 110a and 110b connected with the second set of fluid flow passages configured by at least one of the second cooling panels 106 to facilitate ingress and egress of second coolant in and out of the second cooling panels 106.
  • the second pair of inlet and outlet columns 110a and 110b are configured at opposite rear corners of the multi-circuit heat exchanger system 100 near the intermediate manifold 140 and interconnects all of the second cooling panels 106 configuring the multi-circuit heat exchanger system 100.
  • connection between connector elements of adjacent second cooling panels 106 for configuring the second pair of inlet and outlet columns 110a and 110b is depicted in an enlarged view. More specifically, each column of the second pair of inlet and outlet columns 110a and 110b is configured by assembling and joining connector elements configured on all of the second cooling panels 106 by brazing.
  • each connector element 111 includes a male collar 111m and a female collar 111f.
  • the female collar 111f receives a male collar 111ma of a first connector element 111a configured on an adjacent second cooling panel 106 and the male collar 111m is received in a female collar 111fb of a second connector element 111b configured on another adjacent second cooling panel 106.
  • the connector elements configured on the subsequent adjacent second cooling panels are also assembled to facilitate configuring of the second pair of inlet and outlet columns 110a and 110b.
  • the connector elements can be joined by a single step brazing process to configure the second pair of inlet and outlet columns 110a and 110b, thereby making the manufacturing of the "system" 100 both convenient and quick.
  • the inlet manifold 130a of the first manifold 130 includes at least one inlet 132a that receives high pressure refrigerant to be treated, particularly, high pressure refrigerant to be condensed and facilitates distribution of the high pressure refrigerant to be treated to the inlet tubular elements 102a via the inlet manifold 130a and a distribution arrangement.
  • the outlet manifold 130b includes at least one outlet 132b that delivers out the treated high pressure refrigerant received by the outlet manifold 130b from the outlet tubular elements 102b via a collection arrangement.
  • the manifold 130 includes at least one plate 134 with a first set of slots 134a and a second set of slots 134b configured thereon, at least one distribution column 136a and at least one collection column 136b.
  • the first set of slots 134a in conjunction with the at least one distribution column 136a facilitate distribution of high pressure refrigerant received by the inlet manifold 130a to the inlet tubular elements 102a.
  • the second set of slots 134b in conjunction with the at least one collection column 136b facilitates collection of high pressure refrigerant received from the outlet tubular elements 102b into the outlet manifold 130b. More specifically, each of the first set of slots 134a configured on the at least one plate 134 receives the inlet tubular elements 102a in the form of multi port panels to facilitate fluid communication between the inlet manifold 130a and the inlet tubular elements 102a received in the first set of slots 134a. In one example, converging ends of adjacent multi port panels configuring adjacent inlet tubular elements 102a are received in one of the slots of the first set of slots 134a configured on the at least one plate 134 of the first manifold 130.
  • the remaining slots of the first set of slots 134a also receive converging ends of adjacent multi port panels configuring adjacent inlet tubular elements 102a to facilitate fluid communication between the inlet manifold 130a and the remaining inlet tubular elements 102a .
  • Such configuration of the inlet manifold 130a enables uniform distribution of the high pressure refrigerant received by the inlet manifold 130a to all of the inlet tubular elements 102a .
  • each of the second set of slots 134b configured on the at least one plate 134 receives the outlet tubular elements 102b in the form of multi port panels to facilitate fluid communication between the outlet manifold 130b and the outlet tubular elements 102b received in the second set of slots 134b.
  • converging ends of adjacent multi port panels configuring adjacent outlet tubular elements 102b are received in one of the slots of the second set of 134b configured on the at least one plate 134 of the first manifold 130.
  • the remaining slots of the second set of slots 134a also receive converging ends of adjacent multi port panels configuring adjacent outlet tubular elements 102b to facilitate fluid communication between the outlet manifold 130b and the remaining outlet tubular elements 102b.
  • outlet manifold 130b enables the outlet manifold 130b to effectively collect the high pressure refrigerant from the outlet tubular elements 102b.
  • the sets of inlet and outlet tubular elements 102a and 102b configure connection between the inlet manifold 130a and the outlet manifold 130b
  • the intermediate manifold 140 interconnects and facilitates fluid communication between the inlet tubular elements 102a and corresponding outlet tubular elements 102b.
  • the intermediate manifold 140 includes a cover 142, at least one plate 144 with a first set of slots 144a and a second set of slots 144b configured thereon.
  • the plate 144 with the first set of slots 144a and the second set of slots 144b configured thereon is similar to the plate 134 with the first set of slots 134a and the second set of slots 134b configured thereon.
  • the first set of slots 144a facilitate receiving high pressure refrigerant from the inlet tubular elements 102a and the second set of slots 144b facilitate delivering the high pressure refrigerant to the outlet tubular elements 102b. More specifically, each of the first set of slots 144a configured on the at least one plate 144 receives the inlet tubular elements 102a in the form of multi port panels to facilitate fluid communication between the inlet tubular elements 102a received in the first set of slots 144a and the intermediate manifold 140. In one example, converging ends of adjacent multi port panels configuring adjacent inlet tubular elements 102a are received in one of the slots of the first set of slots 144a configured on the at least one plate 144 of the intermediate manifold 140.
  • the remaining slots of the first set of slots 144a also receive converging ends of adjacent multi port panels configuring adjacent inlet tubular elements 102a to facilitate fluid communication between the remaining inlet tubular elements 102a and the intermediate manifold 140a.
  • each of the second set of slots 144b configured on the at least one plate 144 receives the outlet tubular elements 102b in the form of multi port panels to facilitate fluid communication between the intermediate manifold 140 and the outlet tubular elements 102b received in the second set of slots 144b.
  • converging ends of adjacent multi port panels configuring adjacent outlet tubular elements 102b are received in one of the slots 144b configured on the at least one plate 144 of the intermediate manifold 140.
  • the remaining slots of the second set of slots 144b also receive converging ends of adjacent multi port panels configuring adjacent outlet tubular elements 102b to facilitate fluid communication between the intermediate manifold 140 and the remaining outlet tubular elements 102b.
  • the intermediate manifold 140 configures fluid communication between the sets of inlet and outlet tubular elements 102a and 102b.
  • an adaptor element 150 connected to the first manifold 130 for facilitating receiving of high pressure refrigerant in the "system” 100 and delivering the condensed high pressure refrigerant out of the "system” 100 is illustrated.
  • the adaptor element 150 is configured with snap fit engagement elements 154a and 154b for configuring snap fit engagement with the corresponding engagement elements 138a and 138b configured on the first manifold 130 that facilitate engagement between the adaptor element 150 over the first manifold 130 such that at least one inlet and outlet 152a and 152b configured on the adaptor element 150 are aligned with the corresponding inlet and outlet 132a and 132b configured on the first manifold 130.
  • the inlet 152a configured on the adaptor element 150 is connected to inlet hoses supplying high pressure refrigerant to the "system” 100 and the outlet 152b is connected to the outlet hoses for receiving high pressure refrigerant from the "system" 100.
  • multi-circuit heat exchanger system as defined above, as long as the multi-circuit heat exchanger system include sets of tubular elements that configure fluid flow passages for a refrigerant and plurality of first and second cooling panels to configure independent fluid flow passages for first and second coolants respectively, wherein the first and second cooling panels are so arranged with respect to the sets of tubular elements that at least one set of tubular elements is sandwiched between each of the adjacent first and second cooling panels.

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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)

Claims (15)

  1. Système d'échangeur de chaleur multicircuit (100) comprenant une pluralité d'ensembles d'éléments tubulaires (102a, 102b) configurant des passages de circulation de fluide pour un fluide frigorigène et une pluralité de premiers panneaux de refroidissement (104) et de deuxièmes panneaux de refroidissement (106) configurant des passages de circulation de fluide indépendants pour un premier fluide de refroidissement et un deuxième fluide de refroidissement, respectivement, dans lequel les premiers panneaux de refroidissement (104) et les deuxièmes panneaux de refroidissement (106) sont agencés par rapport aux ensembles d'éléments tubulaires (102a, 102b) de telle sorte qu'au moins un ensemble d'éléments tubulaires (102a, 102b) est intercalé entre chacun des premiers panneaux de refroidissement (104) et deuxièmes panneaux de refroidissement (106) adjacents, caractérisé en ce que chaque élément tubulaire de l'ensemble d'éléments tubulaires (102a, 102b) est adapté pour supporter de hautes pressions de fonctionnement d'un fluide frigorigène à haute pression y circulant, dans lequel chaque élément tubulaire de l'ensemble d'éléments tubulaires (102a, 102b) est adapté pour recevoir du R744 comme fluide frigorigène et supporter des pressions de fonctionnement dans une gamme de 150 à 190 bars.
  2. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, comprenant en outre un collecteur d'entrée (130a) et un collecteur de sortie (130b) d'un premier collecteur (130) qui sont raccordés par au moins un ensemble d'éléments tubulaires (102a, 102b) configurant des passages de circulation de fluide pour le fluide frigorigène.
  3. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel les éléments tubulaires de chaque ensemble d'éléments tubulaires sont divisés en éléments tubulaires d'entrée (102a) et en éléments tubulaires de sortie correspondants (102b) qui sont interconnectés les uns aux autres par un collecteur intermédiaire (140).
  4. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, comprenant en outre une première paire de colonnes d'entrée et de sortie (108a) et (108b) adaptées pour être raccordées par au moins un passage de circulation de fluide configuré par au moins un des premiers panneaux de refroidissement (104).
  5. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, comprenant en outre une deuxième paire de colonnes d'entrée et de sortie (110a) et (110b) adaptées pour être raccordées par au moins un passage de circulation de fluide configuré par au moins un des deuxièmes panneaux de refroidissement (106).
  6. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, les colonnes d'entrée et de sortie (108a) et (108b) de la première paire de colonnes d'entrée et de sortie étant configurées à des coins avant opposés du système d'échangeur de chaleur multicircuit (100) près du premier collecteur (130) et adaptées pour interconnecter tous les premiers panneaux de refroidissement (104) configurant le système d'échangeur de chaleur multicircuit (100).
  7. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, la deuxième paire de colonnes d'entrée et de sortie (110a) et (110b) de la deuxième paire de colonnes d'entrée et de sortie étant configurées à des coins arrière opposés du système d'échangeur de chaleur multicircuit (100) près du collecteur intermédiaire (140) et adaptées pour interconnecter tous les deuxièmes panneaux de refroidissement (106) configurant le système d'échangeur de chaleur multicircuit (100).
  8. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel le premier collecteur (130) comprend au moins une plaque (134) avec un premier ensemble de fentes (134a) et un deuxième ensemble de fentes (134b) configurées par-dessus, au moins une colonne de distribution (136a) et au moins une colonne de collecte (136b), le premier ensemble de fentes (134a), conjointement avec l'au moins une colonne de distribution (136a), est adapté pour faciliter la distribution de fluide frigorigène reçu par le collecteur d'entrée (130a) aux éléments tubulaires d'entrée (102a), et le deuxième ensemble de fentes (134b), conjointement avec l'au moins une colonne de collecte (136b), est adapté pour faciliter la collecte de fluide frigorigène provenant des éléments tubulaires de sortie (102b) à l'intérieur du collecteur de sortie (130b).
  9. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel le collecteur intermédiaire (140) comprend un couvercle (142), au moins une plaque (144) avec un premier ensemble de fentes (144a) en communication fluidique avec un deuxième ensemble de fentes (144b) configurées par-dessus, le premier ensemble de fentes (144a) est adapté pour faciliter la réception de fluide frigorigène provenant des éléments tubulaires d'entrée (102a) et le deuxième ensemble de fentes (144b) est adapté pour faciliter la délivrance du fluide frigorigène reçu depuis le premier ensemble de fentes (144a) aux éléments tubulaires de sortie (102b).
  10. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel chacun des premiers panneaux de refroidissement (104) et des deuxièmes panneaux de refroidissement (106), respectivement, est adapté pour supporter de basses pressions de fonctionnement du premier fluide de refroidissement et du deuxième fluide de refroidissement.
  11. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel chacun des premiers et deuxièmes panneaux de refroidissement est adapté pour recevoir un mélange eau-glycol comme premier fluide de refroidissement et deuxième fluide de refroidissement, respectivement, et supporter des pressions de fonctionnement dans la gamme de 0,5 à 3 bars.
  12. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel chacun des premiers panneaux de refroidissement (104) est formé par jonction de demi-plaques (104a) et (104b) de préférence identiques avec un réseau de limiteurs de débit (120) disposés entre les demi-plaques (104a) et (104b).
  13. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel chacun des deuxièmes panneaux de refroidissement (106) est formé par jonction de demi-plaques (106a) et (106b) de préférence identiques avec les limiteurs de débit (120) disposés entre les demi-plaques (106a) et (106b).
  14. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel chaque colonne de la première paire de colonnes d'entrée (108a) et de colonnes de sortie (108b) est configurée par assemblage et jonction d'éléments de raccordement (105, 105a, 105b) configurés sur des panneaux de refroidissement adjacents de tous les premiers panneaux de refroidissement (104) par brasage, chaque élément de raccordement (105) comprenant un collier mâle (105m) et un collier femelle (105f), dans lequel le collier mâle (105m) est adapté pour être reçu dans un collier femelle (105fa) d'un premier élément de raccordement adjacent (105a) et le collier femelle (105f) est adapté pour recevoir un collier mâle (105mb) d'un deuxième élément de raccordement adjacent (105b).
  15. Système d'échangeur de chaleur multicircuit (100) selon l'une quelconque des revendications précédentes, dans lequel chaque colonne de la deuxième paire de colonnes d'entrée (110a) et de colonnes de sortie (110b) est configurée par assemblage et jonction d'éléments de raccordement (111, 111a, 111b) configurés sur des panneaux de refroidissement adjacents de tous les deuxièmes panneaux de refroidissement (106) par brasage, chaque élément de raccordement (111) comprenant un collier mâle (111m) et un collier femelle (111f), le collier femelle (111f) est adapté pour recevoir un collier mâle (111ma) d'un premier élément de raccordement adjacent (111a) et le collier mâle (111m) est adapté pour être reçu dans un collier femelle (111fb) d'un deuxième élément de raccordement adjacent (111b).
EP18461648.0A 2018-12-18 2018-12-18 Système d'échangeur de chaleur à plusieurs circuits Active EP3671093B1 (fr)

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EP18461648.0A EP3671093B1 (fr) 2018-12-18 2018-12-18 Système d'échangeur de chaleur à plusieurs circuits
PCT/EP2019/085874 WO2020127440A1 (fr) 2018-12-18 2019-12-18 Système d'échangeur de chaleur à circuits multiples

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US2591878A (en) * 1948-09-22 1952-04-08 Gen Motors Corp Oxygen regenerator
FR2611034A1 (fr) * 1987-02-12 1988-08-19 Jean Buffet Conduit d'echangeur a paroi deformable, et echangeur realise avec de tels conduits
US20100294644A1 (en) * 2009-05-20 2010-11-25 Zanaqua Technologies Heat exchanger
DE102009054186A1 (de) * 2009-11-23 2011-05-26 Behr Gmbh & Co. Kg System für ein Kraftfahrzeug zum Erwärmen und/oder Kühlen einer Batterie und eines Kraftfahrzeuginnenraumes
US20180292140A1 (en) * 2017-04-10 2018-10-11 Hamilton Sundstrand Corporation Heat exchanger assembly

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