EP2784428B1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP2784428B1
EP2784428B1 EP14161454.5A EP14161454A EP2784428B1 EP 2784428 B1 EP2784428 B1 EP 2784428B1 EP 14161454 A EP14161454 A EP 14161454A EP 2784428 B1 EP2784428 B1 EP 2784428B1
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EP
European Patent Office
Prior art keywords
refrigerant
pipe
heat exchanger
header
communication hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14161454.5A
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German (de)
English (en)
Other versions
EP2784428A1 (fr
Inventor
Taegyun PARK
Naehyun PARK
Sehyeon KIM
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LG Electronics Inc
Original Assignee
LG Electronics Inc
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Publication of EP2784428A1 publication Critical patent/EP2784428A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • 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
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
    • F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0251—Massive connectors, e.g. blocks; Plate-like connectors
    • F28F9/0253—Massive connectors, e.g. blocks; Plate-like connectors with multiple channels, e.g. with combined inflow and outflow channels

Definitions

  • the present disclosure relates to a heat exchanger.
  • a heat exchanger constitutes a refrigeration cycle to allow a refrigerant to flow therein. Also, the heat exchanger cools or heats air through heat-exchange with the air.
  • the heat exchanger may be used for air-conditioners and refrigerators.
  • the heat exchanger may function as a condenser or evaporator according to whether the refrigerant is condensed or evaporated by the heat exchanger.
  • the heat exchanger is classified into a fin-and-tube type heat exchanger and a micro-channel type heat exchanger according to its shape.
  • the fin-and-tube type heat exchanger includes a plurality of fins and a tube passing through the fins and having a circular shape or a shape similar to the circular shape.
  • the micro-channel type heat exchanger includes a plurality of flat tubes through which a refrigerant flows and a fin disposed between the plurality of flat tubes.
  • the fin-and-tube type heat exchanger and the micro-channel type heat exchanger exchange heat between an external fluid and a refrigerant flowing into the tube or flat tube.
  • the fins may increase a heat exchange area between the external fluid and the refrigerant flowing into the tube or the flat tube.
  • micro-channel type heat exchanger has been filed and registered by this applicant ( KR 10-0547320 ).
  • the micro-channel type heat exchanger may include headers 1 and 2 coupled to a plurality of refrigerant tubes 3.
  • the headers 1 and 2 may be provided in plurality.
  • the first header 1 of the plurality of headers 1 and 2 is coupled to one sides of the plurality of refrigerant tubes 3, and the second header 2 is coupled to the other sides of the plurality of refrigerant tubes 3.
  • a radiation fin 6 for easily heat-exchanging the refrigerant with the external air is disposed between the plurality of refrigerant tubes 3.
  • the first or second header 1 or 2 has a hollow shape having an empty space therein to provide a flow space through which the refrigerant flows.
  • the refrigerant flowing into the first or second header 1 or 2 may be divided into the plurality of refrigerant tube 3.
  • the refrigerant introduced into the heat exchanger is not uniformly distributed into the plurality of refrigerant tubes.
  • a heat-exchange amount or heat-exchange efficiency may be different according to the positions of the refrigerant tubes to deteriorate the overall performance of the heat exchanger.
  • US 5,782,293 describes a heat exchanger for a pulp dryer, the heat exchanger having a frame and a plurality of tubes extending between the ends of the heat exchanger in parallel, spaced-apart relationship to each other.
  • WO 2008/060270 A1 discloses an minichannel heat exchanger header insert for distribution, the inlet header being provided with a first insert disposed within the inlet header and extending substantially the length thereof, and having a plurality of openings for the flow of refrigerant into the internal confines of the inlet header and then to the channels.
  • DE 10 2008 023 055 A1 describes a heat exchanger comprising at least one inlet channel and at least one outlet channel and at least one collector, which has at least two metal sheets or plates abutting each other, and a flow device, through which a first medium can flow, while a second medium can flow around said flow device.
  • Embodiments provide a heat exchanger having improved heat-exchange efficiency.
  • a heat exchanger includes: a plurality of refrigerant tubes through which a refrigerant flows; a header including a tube connection part coupled to the plurality of refrigerant tubes and a refrigerant inflow part; a first pipe provided in the header to define a first flow space for the refrigerant; a second pipe surrounding the outside of the first pipe to define a second flow space for the refrigerant; and a communication hole defined in the first and second pipe to allow the refrigerant to pass therethrough.
  • the communication hole includes a first communication hole defined in the first pipe to transfer the refrigerant within the first flow space into the second flow space.
  • the first communication hole may be spaced apart from the first pipe in a longitudinal direction and be provided in plurality.
  • the communication hole further includes a second communication hole defined in the second pipe to transfer the refrigerant within the second flow space into an inner space of the header.
  • the first and second communication holes are defined in directions opposite to each other with respect to a center of the first or second pipe.
  • a first virtual line extending from a center of the first or second pipe to the first communication hole may extend in a direction opposite to that of a second virtual line extending from the center of the first or second pipe to the second communication hole.
  • the first virtual line may extend in a direction that is close to the refrigerant tube, and the second virtual line may extend in a direction that is away from the refrigerant tube.
  • a third virtual line extending from the center of the first or second pipe to the refrigerant tube may cross the first or second virtual line.
  • the third virtual line may perpendicularly cross the first or second virtual line.
  • the header may include a horizontal type header extending in a horizontal direction, and the first and second communication holes may be defined in the same virtual vertical line.
  • a distance between the first communication hole and an end of the first pipe may be the same as that between the second communication hole and an end of the second pipe.
  • the header may includes a horizontal type header extending in a horizontal direction, and the first and second communication holes may be defined in virtual vertical lines different from each other.
  • a pipe connection part extending from the refrigerant inflow part and coupled to an end of the first pipe may be provided in the header.
  • At least one portion of the pipe connection part may be rounded.
  • a heat exchanger may further include: a plurality of refrigerant tubes through which a refrigerant flows; a header to which the plurality of refrigerant tubes are coupled, the header defining a flow space for the refrigerant; a first pipe provided in the header to define a first passage for the refrigerant, the first pipe having a first communication hole through which the refrigerant passes; and a second pipe accommodating the first pipe to define a second passage for the refrigerant, the second pipe having a second communication hole through which the refrigerant passes, wherein a flow direction of the refrigerant discharged through the first communication hole and a flow direction of the refrigerant discharged through the second communication hole are different from each other with respect to the refrigerant tube.
  • the first and second communication holes may be defined so that the flow directions of the refrigerant discharged through the first and second communication holes are opposite to each other.
  • the flow direction of the refrigerant discharged through the first communication hole may be close to the refrigerant tube, and the flow direction of the refrigerant discharged through the second communication hole may be away from the refrigerant tube.
  • the communication hole may be defined so that the refrigerant discharged through the first communication hole is divided to flow into the second passage.
  • the second communication hole may be defined so that the refrigerant discharged through the second communication hole is divided to flow into a flow space of the header.
  • Fig. 1 is a perspective view of a heat exchanger according to a first embodiment
  • Fig. 2 is a side cross-sectional view of the heat exchanger according to the first embodiment
  • Fig. 3 is a front view illustrating main parts of first and second headers of the heat exchanger according to the first embodiment
  • Fig. 4 is a cross-sectional view taken along line I-I' of Fig. 1 .
  • a heat exchanger 10 includes headers 120 and 130 each of which extends by a predetermined length in a horizontal direction, a plurality of flat tubes 110 that are refrigerant tubes coupled to the headers 120 and 130 to extend in a vertical direction, and a plurality of radiation fins (not shown) arranged at a predetermined distance between the headers 120 and 130 and through which the flat tubes 110 pass.
  • the headers 120 and 130 may be called "horizontal type headers" in that the headers 120 and 130 extend in a horizontal direction.
  • the present disclosure is not limited to the extension direction of the headers.
  • the flat tubes 110 may extend in the horizontal direction.
  • the headers 120 and 130 include a first header 120 coupled to one end of each of the flat tubes 110 and a second header 130 coupled to the other end of each of the flat tubes 110.
  • the first and second headers 120 and 130 guide a flow of a refrigerant to switch a flow direction of the refrigerant.
  • a flow space for the refrigerant is defined in each of the first and second headers 120 and 130.
  • the refrigerant within the first or second header 120 or 130 may be introduced into the flat tubes 110, and the refrigerant flowing in the flat tubes 110 may be switched in direction by the first or second header 120 or 130.
  • the refrigerant within the first header 120 may be switched in direction and then introduced into the flat tubes 110.
  • the refrigerant flows downward through the flat tubes 110 may be switched in direction within the second header 130 to flow upward.
  • the first header 120 includes a refrigerant inflow part 122 for introducing the refrigerant into the heat exchanger 10 and a refrigerant discharge part 125 for discharging the refrigerant heat-exchanged within the heat exchanger 10.
  • the first header 120 includes a first front portion 120a in which the refrigerant inflow part 122 is disposed, a first rear portion 120b in which the refrigerant discharge part 125 is disposed, and a partition part 120c for partitioning the first front portion 120a from the first rear portion 120b.
  • the first front portion 120a and the first rear portion 120b are coupled to each other by the partition part 120c. Also, the refrigerant of the first front portion 120a may directly flow into the first rear portion 120b, or the direct flow of the refrigerant of the first rear portion 120b into the first front portion 120a may be restricted.
  • the refrigerant inflow part 122 and the refrigerant discharge part 125 are disposed adjacent to a bottom surface of the first header 120.
  • the refrigerant may flow upward through the first front portion 120a of the refrigerant inflow part 122 and then be introduced into the first header 120.
  • the refrigerant may flow downward through the refrigerant discharge part 125 from the first rear portion 120b of the first header 120.
  • the second header 130 includes a second front portion 130a corresponding to the first front portion 120a, a second rear portion 130b corresponding to the first rear portion 120b, and a through hole 135 allowing the second front portion 130a to communicate with the second rear portion 130b.
  • the second front portion 130a and the second rear portion 130b are coupled to each other, and the through hole 135 is defined in the coupled portion between the second front portion 130a and the second rear portion 130b.
  • the refrigerant of the second front portion 130a may flow into the second rear portion 130b through the through hole 135.
  • the flat tubes 110 may be provided in plurality between the first header 120 and the second header 130.
  • the plurality of flat tubes 110 are spaced apart from each other in a horizontal direction.
  • a plurality of first tube connection part 121 coupled to one ends of the plurality of flat tubes 110 are disposed on the first header 120. Also, a plurality of second tube connection part 131 to which the other ends of the plurality of flat tubes 110 are coupled are disposed on the second header 130.
  • the flat tubes 110 are arranged in two rows in front and rear directions.
  • the flat tubes 110 when viewed from a side surface of the heat exchanger 10, the flat tubes 110 include a first tube 110a and a second tube 110b disposed on a side of the first tube 110a.
  • the first and second tubes 110a and 110b may be provided in plurality and thus be respectively coupled to the first and second headers 120 and 130.
  • the first tube 110a may be coupled to the first front portion 120a and the second front portion 130a
  • the second tube 110b may be coupled to the first rear portion 120b and the second rear portion 130b.
  • the heat-exchange of the refrigerant may be performed two times. That is, the refrigerant may be heat-exchanged once while flowing from the first front portion 120a to the second front portion 130a through the first tube 110a, and also, the refrigerant may be heat-exchanged once while flowing from the second rear portion 130b to the first rear portion 120b through the second tube 110b.
  • a plurality of pipes 210 and 250 for guiding a flow of the refrigerant are disposed in the front portion 120a of the first header 120.
  • the flow space within the first front portion 120a may form a plurality of passages or flow layers by the plurality of pipes 210 and 250.
  • the plurality of pipes 210 and 250 include a first pipe 210 disposed in an inner space of the first front portion 120a.
  • the first pipe 210 may lengthily extend in the extension direction of the first front portion 120a and have a hollow cylindrical shape.
  • an inner space of the first pipe 210 is defined as a first flow space for the refrigerant.
  • the plurality of pipes 210 and 250 include a second pipe 250 surrounding the outside of the first pipe 210.
  • the second pipe 250 may lengthily extend in the extension direction of the first pipe 210 and have a hollow cylindrical shape. Also, an inner space of the second pipe 250 is defined as a second flow space for the refrigerant.
  • the second pipe 250 has a diameter D2 greater than that D1 of the first pipe 210.
  • a space in which the refrigerant flows i.e., the second flow space may be defined between an outer circumferential surface of the first pipe 250 and an inner circumferential surface of the second pipe 210.
  • first and second pips 210 and 250 may have substantially the same center. Also, a ratio of an inner sectional area of the second pipe 250 to an inner sectional area of the first front portion 120a may be about 10:1 to about 2:1
  • a first communication hole 215 through which the refrigerant flows is defined in the first pipe 210.
  • the first communication hole 215 may be provided in plurality, and the plurality of first communication holes 215 are spaced apart from each other in a longitudinal direction of the first pipe 210.
  • the refrigerant flowing into the first pipe 210 may flow out of the first pipe 210 through the first communication hole 215. Also, the refrigerant discharged from the first pipe 210 may flow along the inner space of the second pipe 250.
  • the first commendation hole 215 may be defined in one point of a circumference of the first pipe 210 facing the first tube 110a. That is, a virtual line extending from an inner center of the first pipe 210 to the first communication hole 215 may extend in a direction that is close to the first tube 110a or may pass through the inside of the first tube 110a.
  • a second communication hole 255 through which the refrigerant flows is defined in the second pipe 250.
  • the second communication hole 255 may be provided in plurality, and the plurality of second communication holes 255 are spaced apart from each other in a longitudinal direction of the second pipe 250.
  • the refrigerant flowing into the second pipe 250 may flow out of the second pipe 250 through the second communication hole 255. Also, the refrigerant discharged from the second pipe 250 may flow along the inner space of the first front portion 120a.
  • the second communication hole 255 may be defined in one point of a circumference of the second pipe 250 in a direction opposite to the direction facing the first tube 110a. That is, a virtual line extending from an inner center of the second pipe 250 to the second communication hole 255 may extend in a direction away from the first tube 110a.
  • the first and second communication holes 215 and 255 may be defined in directions opposite to each other or facing each other with respect to a center of the first or second pipe 210 or 250. On the other hand, the first and second communication holes 215 and 255 may have a phase difference of about 180 degrees with respect to the cylindrical pipes 210 and 250.
  • a first virtual line extending from the center of the first or second pipe 210 or 250 to the first communication hole 215 and a second virtual line extending from the center of the first or second pipe 210 or 250 to the second communication hole 255 may be parallel to each other and extend in direction opposite to each other.
  • angles ⁇ 1 and ⁇ 2 between the center of the first or second pipe and the two virtual lines connecting both ends of the flat tube 110 to each other may range of about 75° to about 90°.
  • the first and second communication holes 215 and 255 may be defined in a circumference of the first or second pipe 210 or 250 to correspond to the angles ⁇ 1 and ⁇ 2.
  • the flow passage of the refrigerant passing through the first and second communication holes 215 and 255 may be elongated and bent several times.
  • a pipe connection part 205 connected to the refrigerant inflow part 122 is provided in the first front portion 120a.
  • the pipe connection part 205 extends from the refrigerant inflow part 122 and then is connected to an end of the first pipe 210.
  • at least one portion of the pipe connection part 205 may be rounded.
  • a predetermined refrigerant pipe 20 is connected to the refrigerant inflow part 122 at an inlet part of the heat exchanger 10.
  • the refrigerant flowing into the refrigerant pipe 20 is introduced into the first pipe 210 via the refrigerant inflow part 122 and the pipe connection part 205.
  • the first and second communication holes 215 and 255 may have the same virtual vertical line that pass therethrough. That is, a distance between the center of each of the plurality of first communication holes 215 and an end of the first pipe 210 may be the same as that between the center of each of the plurality of second communication holes 255 and an end of the second pipe 250.
  • Fig. 5 is a cross-sectional view of constitutions in the header according to the first embodiment
  • Fig. 6 is a cross-sectional view of the constitutions and a refrigerant flow in the header according to the first embodiment
  • Fig. 7 is a view of a refrigerant flow in the heat exchanger according to the first embodiment.
  • a plurality of refrigerant passages 271, 272, and 273 divided by the plurality of pipes 210 and 250 may be defined in the inner space of the first header 120 of the heat exchanger according to the first embodiment.
  • the second pipe 250 is disposed inside the first front portion 120a, and the first pipe 210 is accommodated into the second pipe 250.
  • the inner space of the first pipe 210 may define a first passage 271 through which the refrigerant introduced into the first front portion 120a from the refrigerant inflow part 122 flows. Also, a portion of the inner space of the second pipe 250 except for the first passage 271 is defined as a second passage 272, and an outer space of the second pipe 250 of the inner space of the first front portion 120a is defined as a third passage 273.
  • the first passage 271, the second passage 272, and the third passage 273 may communicate with each other by the first and second communication holes 215 and 255.
  • the second passage 272 may surround the first passage 271, and the third passage 273 may surround the second passage 272.
  • the second passage 272 is formed from an outer circumferential surface of the first pipe 210 to an inner circumferential surface of the second pipe 250, the second passage 272 may form a relatively small passage. Thus, the refrigerant discharged through the first communication hole 215 of the first pipe 210 may be mixed in the second passage 272.
  • the refrigerant discharged from the first pipe 210 may be a refrigerant before being heat-exchanged.
  • the heat exchanger serves as the evaporator
  • the refrigerant may have a two-phase state (a mixed state of a liquid phase and a gaseous phase).
  • the liquid refrigerant and the gaseous refrigerant may be uniformly mixed with each other, and then, the mixed refrigerant may be divided into the flat tubes 110.
  • the refrigerant introduced into the first header 120 through the refrigerant inflow part 122 may flow into the first passage 271 of the first pipe 210.
  • the refrigerant may flow from one end of the first header 120 to the other end in a horizontal direction (a direction from a right side to a left side in Fig. 1 ).
  • a direction in which the refrigerant is discharged through the first communication hole 215 may be a direction facing the flat tubes 110.
  • the refrigerant is discharged from the first communication hole 215, the refrigerant flows into the second passage 272 of the second pipe 250. In this process, the refrigerant is divided into both sides of the first communication hole 215 to flow in a backward direction, i.e., a direction away from the flat tubes 110.
  • the divided refrigerant may be combined and then discharged into the third passage 273 through the plurality of second communication holes 255.
  • the refrigerant may flow in the direction away from the flat tubes 110.
  • the refrigerant discharged from the second communication holes 255 may be divided into both sides to flow in a forward direction, i.e., a direction facing the flat tubes 110. Also, the refrigerant of the third passage is introduced into the flat tubes 110.
  • the refrigerant of the first tube 210 may be divided and bent several times until the refrigerant is introduced into the flat tubes 110.
  • a flow path of the refrigerant may be elongated in length.
  • a phenomenon in which the refrigerant is concentrated into the flat tube 110 that is the closest to the refrigerant inflow part 122 may be prevented, and thus, the refrigerant may uniformly flow in a longitudinal direction by an inertial force.
  • the refrigerant passing through the first tube 110a is introduced into the second front portion 130a of the second header 130 through the second tube connection part 131, and also, is introduced into the second rear portion 130b via the through hole 135. Also, the refrigerant is introduced into the first rear portion 120b after passing through the second tube 110b and then is discharged into the heat exchanger 10 through the refrigerant discharge part 125.
  • the refrigerant performs the heat-exchange two times while circulating the first and second headers 120 and 130 and thus is condensed (in the case where the heat exchanger is the condenser) or evaporated (in the case where the heat exchanger is the evaporator).
  • Fig. 8 is a cross-sectional view illustrating constitutions and refrigerant flow in a header according to a second embodiment.
  • a plurality of pipes 310 and 315 are provided in a first front portion 120a of a first header 120 according to the second embodiment.
  • the plurality of pipes 310 and 315 include a first pipe 310 having a first communication hole 315 and a second pipe 350 surrounding the outside of the first pipe 310 and having a second communication hole 355.
  • the first and second pipes 310 and 350 may have substantially the same center.
  • the first and second pipes 310 and 350 according to the current embodiment may be disposed similar to the first and second pipes 210 and 250 according to the first embodiment. However, the current embodiment is different from the first embodiment in that the first and second communication holes 315 and 355 are different in position.
  • the first and second communication holes 315 and 355 are disposed to face a side direction in Fig. 8 .
  • a first virtual line extending from a center of the first or second pipe 310 or 350 toward the first communication hole 315 and a third virtual line extending from the center of the first or second pipe 310 or 350 toward a flat tube 110 may cross each other.
  • the first virtual line and the third virtual line may be perpendicular to each other.
  • a second virtual line extending from the center of the first or second pipe 310 or 350 toward the second communication hole 355 and the third virtual line extending from the center of the first or second pipe 310 or 350 toward the flat tube 110 may cross each other.
  • the second virtual line and the third virtual line may be perpendicular to each other.
  • the refrigerant flowing into the first pipe 310 is discharged to a side of the flat tube 110 through the first communication hole 315, and the discharged refrigerant is divided into both sides to flow an opposite side of the flat tube 110 (see Fig. 8 ).
  • the refrigerant flowing into the second pipe 350 is combined and then discharged through the second communication hole 355 to flow into the flat tube 110 in the first front portion 120a.
  • the refrigerant is divided into both sides in the second communication hole 355 to flow to the flat tube 110.
  • an amount of refrigerant divided along a path that is defined close to the flat tube 110 in the second communication hole 355 may be relatively large.
  • the passage may be bent several times by passing through a first passage defined in the first pipe, a second passage defined in the second pipe, and a third passage defined in the first front portion 120a.
  • a flow path of the refrigerant may be elongated in length.
  • Fig. 9 is a cross-sectional view of constitutions in a header according to a third embodiment.
  • a first communication hole 215 defined in a first pipe 210 and a second communication hole 255 defined in a second pipe 250 according to a third embodiment may be disposed along virtual vertical lines different from each other, respectively.
  • a distance between each of the plurality of first communication holes 215 and an end of the first pipe 210 may be different from that between each of the plurality of second communication holes 255 and an end of the second pipe 250.
  • first communication holes 215 and the second communication holes 255 may be alternately defined with respect to a horizontal direction in which the first header 120 extends.
  • an inertial force that is applied horizontally from the refrigerant inflow part 122 and a flow force that is applied vertically to the flat tube 110 may act on the refrigerant.
  • the refrigerant may be easily discharged from the second pipe 250 through the second communication hole 255 adjacent to the first communication hole 215. Therefore, the refrigerant may be effectively distributed into the plurality of flat tubes 110.
  • the refrigerant since the plurality of tubes are provided in the header, and the communication holes through which the refrigerant flows are defined in the plurality of tubes, the refrigerant may uniformly flow over the whole length of the header. Thus, the refrigerant may be uniformly distributed into the refrigerant tubes connected to the header.
  • the flow passage of the refrigerant may be bent several times and elongated.
  • the refrigerant may be uniformly distributed into the rear refrigerant tube that is the farrest to the refrigerant inflow part of the header by the inertial force.
  • the small space between the one tube and the other tube may act as the passage for the refrigerant to mix the refrigerants. Therefore, the gaseous and liquid refrigerants may be uniformly distributed.

Landscapes

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

Claims (11)

  1. Échangeur de chaleur, comprenant une pluralité de tubes de réfrigérant (110) ; un collecteur (120) comportant une section de connexion de tube (121) raccordée à la pluralité de tubes de réfrigérant (110), et une section d'admission de réfrigérant (122) ; un premier conduit (210, 310) prévu à l'intérieur du collecteur (120) pour définir un premier espace d'écoulement pour le réfrigérant à l'intérieur du premier conduit (210, 310) ; un deuxième conduit (250, 350) entourant la périphérie du premier conduit (210, 310) pour définir un deuxième espace d'écoulement pour le réfrigérant entre le premier conduit (210, 310) et le deuxième conduit (250, 350) ; et un trou de communication (215, 255 ; 315, 355) défini dans le premier (210, 310) et le deuxième conduits (250, 350) pour permettre le passage du réfrigérant, où
    un premier trou de communication (215, 315) est défini dans le premier conduit (210, 310) pour transférer le réfrigérant présent à l'intérieur du premier espace d'écoulement vers le deuxième espace d'écoulement ; et
    un deuxième trou de communication est défini dans le deuxième conduit (250, 350) pour transférer le réfrigérant présent à l'intérieur du deuxième espace d'écoulement vers un espace intérieur du collecteur (120, 310),
    caractérisé en ce que
    le premier et le deuxième trous de communication (215, 255 ; 315, 355) sont définis dans des directions opposées par rapport à un axe central du premier (210, 310) ou du deuxième conduit (250, 350).
  2. Échangeur de chaleur selon la revendication 1, où les premiers trous de communication (215, 315) sont prévus en pluralité et sont espacés l'un de l'autre dans le sens de la longueur du premier conduit (210, 310).
  3. Échangeur de chaleur selon la revendication 1, où une première ligne virtuelle s'étendant depuis un axe central du premier (210) ou du deuxième conduit (250) vers le premier trou de communication (215) s'étend dans une direction opposée à une deuxième ligne virtuelle s'étendant depuis l'axe central du premier (210) ou du deuxième conduit (250) vers le deuxième trou de communication (255).
  4. Échangeur de chaleur selon la revendication 3, où la première ligne virtuelle s'étend dans une direction de rapprochement graduel vers le tube de réfrigérant (110), et la deuxième ligne virtuelle s'étend dans une direction d'éloignement graduel du tube de réfrigérant (110).
  5. Échangeur de chaleur selon la revendication 3, où une troisième ligne virtuelle s'étendant depuis l'axe central du premier (310) ou du deuxième conduit (350) vers le tube de réfrigérant (110) croise la première ou la deuxième ligne virtuelle, en vue le long de l'axe central.
  6. Échangeur de chaleur selon la revendication 5, où la troisième ligne virtuelle croise perpendiculairement la première ou la deuxième ligne virtuelle, en vue le long de l'axe central.
  7. Échangeur de chaleur selon l'une des revendications 1 à 4, où le collecteur (120) comprend un collecteur de type horizontal s'étendant dans une direction horizontale, et où le premier et le deuxième trous de communication (215, 255) sont définis sur la même ligne verticale virtuelle.
  8. Échangeur de chaleur selon la revendication 9, où la distance entre le centre du premier trou de communication (215) et une extrémité du premier conduit (210) est identique à celle entre le centre du deuxième trou de communication (255) et une extrémité du deuxième conduit (250).
  9. Échangeur de chaleur selon l'une des revendications 1 à 4, où le collecteur (120) comprend un collecteur de type horizontal s'étendant dans une direction horizontale, et où le premier et le deuxième trous de communication (215, 255) sont définis sur des lignes verticales virtuelles différentes l'une de l'autre.
  10. Échangeur de chaleur selon l'une des revendications 1 à 9, où une section de connexion de conduit (205) s'étendant depuis la section d'admission de réfrigérant (122) et raccordée à une extrémité du premier conduit (210) est présentée à l'intérieur du collecteur (120).
  11. Échangeur de chaleur selon la revendication 10, où au moins une partie de la section de connexion de conduit (205) est arrondie.
EP14161454.5A 2013-03-25 2014-03-25 Échangeur de chaleur Active EP2784428B1 (fr)

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KR1020130031408A KR20140116626A (ko) 2013-03-25 2013-03-25 열교환기

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EP2784428B1 true EP2784428B1 (fr) 2019-02-20

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US (2) US20140284035A1 (fr)
EP (1) EP2784428B1 (fr)
KR (1) KR20140116626A (fr)
CN (1) CN104075496A (fr)

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JP6361452B2 (ja) * 2014-10-16 2018-07-25 ダイキン工業株式会社 冷媒蒸発器
KR101837046B1 (ko) * 2015-07-31 2018-04-19 엘지전자 주식회사 열교환기
KR101724296B1 (ko) * 2015-08-13 2017-04-07 엘지전자 주식회사 전기자동차의 배터리 열교환 장치
CN106440861B (zh) * 2016-08-30 2018-07-13 杭州三花微通道换热器有限公司 换热器组件和具有其的制冷***
FR3059406B1 (fr) * 2016-11-30 2019-07-12 Valeo Systemes Thermiques Dispositif de mixage d'un fluide refrigerant a l'interieur d'une boite collectrice d'un echangeur thermique pour une installation de conditionnement d'air d'un vehicule
FR3061284B1 (fr) * 2016-11-30 2019-10-18 Valeo Systemes Thermiques Echangeur de chaleur constitutif d'un circuit de fluide refrigerant
FR3059396B1 (fr) * 2016-11-30 2020-12-04 Valeo Systemes Thermiques Dispositif de distribution d'un fluide refrigerant a l'interieur d'une boite collectrice d'un echangeur thermique
FR3061950B1 (fr) * 2016-11-30 2020-02-14 Valeo Systemes Thermiques Dispositif d’homogeneisation de la distribution d’un fluide refrigerant a l’interieur de tubes d’un echangeur de chaleur constitutif d’un circuit de fluide refrigerant
FR3061280B1 (fr) * 2016-11-30 2019-08-09 Valeo Systemes Thermiques Dispositif de distribution d'un fluide refrigerant a l'interieur d'une boite collectrice d'un echangeur thermique pour une installation de conditionnement d'air d'un vehicule
FR3061951B1 (fr) * 2016-11-30 2019-06-21 Valeo Systemes Thermiques Dispositif de distribution d'un fluide refrigerant a l'interieur d'une boite collectrice d'un echangeur thermique.
FR3075349B1 (fr) * 2017-12-19 2020-05-15 Valeo Systemes Thermiques Dispositif de distribution d'un fluide refrigerant a l'interieur d'une boite collectrice d'un echangeur thermique, et boite collectrice equipee d'un tel dispositif de distribution
FR3075347B1 (fr) * 2017-12-19 2020-05-15 Valeo Systemes Thermiques Dispositif de distribution d'un fluide refrigerant destine a etre loge dans une boite collectrice d'un echangeur de chaleur
FR3075348B1 (fr) * 2017-12-19 2020-05-15 Valeo Systemes Thermiques Dispositif de distribution d'un fluide refrigerant destine a etre loge dans une boite collectrice d'un echangeur de chaleur
FR3075346B1 (fr) * 2017-12-19 2020-05-22 Valeo Systemes Thermiques Boite collectrice d'un echangeur thermique munie d'un organe de maintien et/ou de positionnement angulaire d'un dispositif de distribution d'un fluide refrigerant
KR102132742B1 (ko) * 2018-07-25 2020-07-10 엘지전자 주식회사 열교환기
CN110940220B (zh) * 2018-09-25 2022-03-01 丹佛斯有限公司 用于换热器的分配管组件和具有该分配管组件的集流管组件和换热器
DK181588B1 (en) * 2020-06-23 2024-06-10 Carsoe Seafood Aps Freezer plate, and method for modifying a freezer plate
CN112146310A (zh) * 2020-10-12 2020-12-29 浙江新金宸机械有限公司 一种扁管微通道双液体换热器及其换热方法
CN114688765A (zh) * 2020-12-30 2022-07-01 广东美的白色家电技术创新中心有限公司 换热器和空调器
CN115342560B (zh) * 2022-06-27 2023-07-18 西安交通大学 一种流量均匀分配装置及其应用

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EP1548380A2 (fr) 2003-12-22 2005-06-29 Hussmann Corporation Evaporateur à tubes plats avec micro-distributeur
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Also Published As

Publication number Publication date
EP2784428A1 (fr) 2014-10-01
KR20140116626A (ko) 2014-10-06
US20140284035A1 (en) 2014-09-25
CN104075496A (zh) 2014-10-01
US20160377347A1 (en) 2016-12-29

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