EP1132706A2 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP1132706A2
EP1132706A2 EP01105273A EP01105273A EP1132706A2 EP 1132706 A2 EP1132706 A2 EP 1132706A2 EP 01105273 A EP01105273 A EP 01105273A EP 01105273 A EP01105273 A EP 01105273A EP 1132706 A2 EP1132706 A2 EP 1132706A2
Authority
EP
European Patent Office
Prior art keywords
heat
headers
exchange tubes
heat exchanger
portions
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.)
Withdrawn
Application number
EP01105273A
Other languages
German (de)
English (en)
Other versions
EP1132706A3 (fr
Inventor
Koji Mitsubishi Heavy Ind. Ltd. Nakado
Toru Mitsubishi Heavy Ind. Ltd. Okamura
Masashi Mitsubishi Heavy Ind. Ltd. Inoue
Kei Mitsubishi Heavy Industries Ltd. Yoshitomi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP1132706A2 publication Critical patent/EP1132706A2/fr
Publication of EP1132706A3 publication Critical patent/EP1132706A3/fr
Withdrawn legal-status Critical Current

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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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0316—Assemblies of conduits in parallel
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0391—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 plate-like or laminated conduits a single plate being bent to form one or more 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments

Definitions

  • the present invention relates to a heat exchanger which is suitable for used as a heat exchanger of a refrigerant and constitutes a condenser and an evaporator of an air conditioner.
  • a refrigerant (fluid) which has been transformed into a compressed gas having high temperature and pressure, is liquefied in a condenser, and the liquefied refrigerant is vaporized by removing heat of evaporation in an evaporator.
  • a heat exchanger which equips a plurality of heat-exchange tubes for flowing the refrigerant in the inside thereof is used in the condenser and evaporator. In this heat exchanger, the refrigerant which flows through the heat-exchange tubes radiates or absorbs heat through the walls of the heat-exchange tubes.
  • the heat exchanger as shown in Figs. 23 to 26 is known as this type of heat exchanger.
  • the heat exchanger comprises: a pair of headers 10, 10 which are provided in parallel facing each other through a predetermined distance, and a pathway of the refrigerant (fluid) is respectively provided therein; a plurality of flat heat-exchange tubes 20, 20... which are provided in parallel between the headers 10, 10, and both ends thereof are fastened to the headers 10, 10 and a pathway of the refrigerant for connecting the pathways of both headers 10, 10 is respectively provided therein; and a plurality of fins 30, 30... which are provided between the adjacent heat-exchange tubes 20, 20... to contact the outer surfaces of the heat-exchange tubes 20, 20... which face each other.
  • an inlet 13 of the refrigerant is provided on one end of one of the headers 10, and an outlet 14 of the refrigerant which is approximately located at the farthest position from the inlet 13 on a diagonal line toward the inlet 13, is provided on the other header 10.
  • connecting structures between the headers 10, 10 and the heat-exchange tubes 20, 20... are provided by inserting end portions 21, 21... of the heat-exchange tubes 20, 20... into insertion holes 11, 11... which are bored on the headers 10, 10, and air-tightly and liquid-tightly fastening the headers 10, 10 and the heat-exchange tubes 20, 20...
  • Each heat-exchange tube 20 is constructed by bending a belt shaped metal plate 22 in which solder is clad on both surfaces thereof at a folding portion 23 provided along the longitudinal direction of the metal plate 22, and by forming a passage for the refrigerant between wall portions 24, 25 which are located on one and the other sides of the bent metal plate 22 by attaching connecting end portions 26, 26 which are formed at the ends of the wall portions 24, 25 along the longitudinal direction of the bent metal plate 22.
  • the radius of curvature of the folding portion 23 is smaller than the widths of the wall portions 24, 25, and therefore, the heat-exchange tube 20 forms a flat shape in which the distance between the wall portions 24, 25 is shortened to the widths thereof.
  • a plurality of bulging members 28, 28... project from the wall portions 24, 25 toward the opposing wall portions.
  • Each of these bulging members 28, 28... has a truncated-cone shape, and a flat connecting portion 28a is provided on the connecting end thereof.
  • the connecting portions 28a, 28a... of the opposing bulging members 28, 28... contact each other.
  • a notch 16 is provided on the connecting end portions 26, 26 of each end portion 21 so as to unify the inserted length of the end portion 21 by attaching the notch 16 to the edge of the insertion hole 11 when the end portion 21 is inserted into the insertion hole 11.
  • the heat exchanger is assembled by the following steps: producing the heat-exchange tubes 20, 20... by forming a metal tube by press molding or roll molding and cutting both ends of the metal tube; inserting the end portions 21, 21... of the heat-exchange tubes 20, 20... into the insertion holes 11, 11... of the headers 10, 10...; providing fins 30, 30... between the adjacent heat-exchange tubes 20, 20... by contacting the fins 30, 30... to both of the opposing outer surfaces of the adjacent heat-exchange tubes 20, 20... in order to prevent the separation of the connecting end portions 26, 26 of each heat-exchange tube 20 by a spring-back force, and retaining these heat-exchange tubes 20, 20... and the fins 30, 30... which form multilayers, by sandwiching them between a pair of holding plates 15, 15 from the outside.
  • the heat exchanger is temporarily assembled by using jigs, and braze-welded by heating in a furnace. That is, joints between the insertion holes 11, 11... and the heat-exchange tubes 20, 20... , and a joint between the opposing connecting end portions 26, 26 are each air-tightly and liquid-tightly fastened by braze-welding. Furthermore, the connecting portions 28a, 28a... of the opposing bulging members 28, 28... are also fastened by braze-welding.
  • the refrigerant flows into a header 10 from the inlet 13, branches off and passes through each heat-exchange tube 20, flows into the opposite header 10, and flows out from the outlet 14.
  • the refrigerant exchanges heat toward an outer part through the wall surfaces of the heat-exchange tubes 20, 20....
  • the heat-exchange tubes 20, 20... in which the high pressure refrigerant flows have a structure for improving the resistance against the pressure force which is exerted on the wall portions 24, 25 of the flat heat-exchange tubes 20, 20.... That is, the wall portions 24, 25 which are positioned on the top and bottom facing each other, are connected by welding the connecting portions 28a, 28a... of the opposing bulging members 28, 28... which are used to stir the refrigerant.
  • No bulging members are provided around the opening ends which provide the inlet/outlet portion for the refrigerant at both ends of the heat-exchange tubes 20, 20..., in order to prevent problems such as pressure losses of the refrigerant caused by sudden expansion/contraction of the refrigerant.
  • the formed opening ends tend to be easily deformed along the cutting direction of the tube because the bulging members which support the opposing wall portions are not provided.
  • the opening ends which have deformations such as bending or twisting, are difficult to insert into the insertion holes of the header.
  • the present invention is achieved in consideration of the above circumstances, and an object thereof is to provide a heat exchanger in which braze-welding can be performed more properly and which possesses superior sealing performance and resistance against the pressure.
  • a first aspect of the heat exchanger of the present invention comprises: a pair of headers which are provided in parallel facing each other through a predetermined distance and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes which are provided between the headers in parallel, both ends thereof are fastened to the headers and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein; wherein connecting structures between the headers and the heat-exchange tubes are provided by inserting the end portions of the heat-exchange tubes into insertion holes which are bored on the header, and air-tightly and liquid-tightly fastening the header and the heat-exchange tubes; and shape-holding portions for preventing the deformation of the opening ends of the heat-exchange tube which are provided in the vicinity of the opening ends of each heat-exchange tube.
  • the shape-holding portions are provided by reinforcement members which project from at least one of the opposing wall portions of the heat-exchange tube toward the other opposing wall portion, and the connecting ends of the opposing reinforcement members contact each other.
  • a second aspect of the heat exchanger of the present invention comprises: a pair of headers which are provided in parallel facing each other through a predetermined distance and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes which are provided between the headers in parallel, both ends thereof are fastened to the headers, and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein, wherein connecting structures between the headers and the heat-exchange tubes are provided by inserting end portions of the heat-exchange tubes into insertion holes which are bored on the header, and air-tightly and liquid-tightly fastening the header and the heat-exchange tubes; and an insertion end portion, in which the width thereof between opposing side walls of the heat-exchange tube becomes narrower as it approaches an opening end of the heat-exchange tube, which is provided on each end portion of the heat-exchange tubes.
  • each insertion hole has a shape corresponding to the shape of the insertion end portion.
  • the insertion end portion has a contacting portion which is inwardly or outwardly projecting from the outer surface thereof, and each insertion hole has a shape corresponding to the shape of the insertion end portion in which the contacting portion is provided.
  • a third aspect of the heat exchanger of the present invention comprises: a pair of headers which are provided in parallel facing each other through a predetermined distance, and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes which are provided between the headers in parallel, both ends thereof are fastened to the headers, and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein, wherein connecting structures between the headers and the heat-exchange tubes are provided by inserting end portions of the heat-exchange tubes into insertion holes which are bored on the header, and air-tightly and liquid-tightly fastening the header and the heat-exchange tubes; and a comer of an opening end of each heat-exchange tube which is partly cut off.
  • a fourth aspect of the heat exchanger of the present invention comprises: a pair of headers which are provided in parallel to facing each other through a predetermined distance, and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes which are provided between the headers in parallel, both ends thereof are fastened to the headers and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein, wherein connecting structures between the headers and the heat-exchange tubes are provided by inserting end portions of the heat-exchange tubes into insertion holes which are bored on the header, and air-tightly and liquid-tightly fastening the header and the heat-exchange tubes; and a removal prevention member which is fastened to opposing wall portions of each heat-exchange tube for preventing the deformation of the heat-exchange tube caused by removal of the wall portions, and which is provided on at least one of the wall portions.
  • the removal prevention member is provided by bulging members which project from respective wall portions toward the opposing wall portions, and the connecting ends of the opposing bulging members contact each other and are welded by laser.
  • the removal prevention member is provided with projections which project from respective wall portions toward the opposing wall portions, a hole which is provided on one of the projections, a pipe member which is provided on the other projection and passes through the hole, and a caulked portion which is provided on the ends of the projections for fastening the projections by being turning downward and caulking the end of the pipe member.
  • the removal prevention member is provided by extending a part of one of the opposing wall portions from each opening end of the heat-exchange tubes and bending toward the other wall portion so as to be fastened to the other wall portion.
  • Fig. 1 is an enlarged cross-sectional view of the main part of the heat exchanger according to the first embodiment of the present invention.
  • Fig. 2 is an enlarged perspective view of the main part of the heat-exchange tube according to the first embodiment of the present invention.
  • Fig. 3 is an enlarged perspective view of the main part of the heat-exchange tube according to the second embodiment of the present invention.
  • Fig. 4 is an enlarged front view of the main part of the header which has an insertion hole according to the second embodiment of the present invention.
  • Fig. 5 is an enlarged perspective view of the main part of a variation of the heat-exchange tube according to the second embodiment of the present invention.
  • Fig. 6 is an enlarged front view of the main part of a variation of the header which has an insertion hole according to the second embodiment of the present invention.
  • Fig. 7 is an enlarged perspective view of the main part of another variation of the heat-exchange tube according to the second embodiment of the present invention.
  • Fig. 8 is an enlarged front view of the main part of another variation of the header which has an insertion hole according to the second embodiment of the present invention.
  • Fig. 9 is an enlarged perspective view of the main part of another variation of the heat-exchange tube according to the second embodiment of the present invention.
  • Fig. 10 is an enlarged front view of the main part of another variation of the header which has an insertion hole according to the second embodiment of the present invention.
  • Fig. 1 is an enlarged cross-sectional view of the main part of another variation of the heat exchanger according to the second embodiment of the present invention.
  • Fig. 12 is an enlarged perspective view of the main part of another variation of the heat-exchange tube according to the second embodiment of the present invention.
  • Fig. 13 is an enlarged front view of the main part of another variation of the header which has an insertion hole according to the second embodiment of the present invention.
  • Fig. 14 is an enlarged cross-sectional view of the main part of another variation of the heat exchanger according to the second embodiment of the present invention.
  • Fig. 15 is an enlarged perspective view of the main part of the heat-exchange tube according to the third embodiment of the present invention.
  • Fig. 16 is an enlarged plan view of the main part of the heat exchanger according to the third embodiment of the present invention.
  • Fig. 17 is an enlarged perspective view of the main part of the heat-exchange tube according to the fourth embodiment of the present invention.
  • Fig. 18 is an enlarged cross-sectional view of the main part of the heat exchanger according to the fourth embodiment of the present invention.
  • Fig. 19 is an enlarged perspective view of the main part of the heat-exchange tube according to the fifth embodiment of the present invention.
  • Fig. 20 is an enlarged cross-sectional view of the main part of the heat exchanger according to the fifth embodiment of the present invention.
  • Fig. 21 is an enlarged perspective view of the main part of the heat-exchange tube according to the sixth embodiment of the present invention.
  • Fig. 22 is an enlarged cross-sectional view of the main part of the heat exchanger according to the sixth embodiment of the present invention.
  • Fig. 23 is a front view of a conventional heat exchanger.
  • Fig. 24 is an enlarged perspective view of the main part of the heat exchanger shown in Fig. 23.
  • Fig. 25 is an enlarged plan view of the main part of the heat exchanger shown in Fig. 23.
  • Fig. 26 is a cross-sectional view along the line A-A shown in Fig. 25.
  • FIGs. 1 and 2 show a first embodiment of the heat exchanger of the present invention.
  • a heat exchanger denoted by the symbol "A" has a similar structure to the conventional heat exchanger, which is disclosed in Fig. 23, and comprises: a pair of headers 10, 10 which are provided in parallel facing each other through a predetermined distance, and a pathway of the refrigerant (fluid) is respectively provided therein; a plurality of flat heat-exchange tubes 20, 20... which are provided in parallel between the headers 10, 10, both ends thereof are fastened to the headers 10, 10 and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein; and a plurality of fins 30, 30... which are provided between the adjacent heat-exchange tubes 20, 20... to contact the outer surfaces of the heat-exchange tubes 20, 20... which face each other.
  • Each heat-exchange tube 20 is constructed by bending a belt-shaped metal plate 22 on which solder is clad on both surfaces thereof at a folding portion 23 provided along the longitudinal direction of the metal plate 22, and by forming a passage 27 for the refrigerant by attaching connecting end portions 26, 26 to the ends of the wall portions 24, 25 which are formed by bending and which extend along the longitudinal direction of the metal plate 22.
  • a plurality of bulging members 28, 28... project from the wall portions 24, 25 toward the opposing wall portions.
  • Each of these bulging members 28, 28... has a truncated-cone shape, and a flat connecting portion 28a is provided on the connecting end thereof.
  • the connecting portions 28a, 28a... of the opposing bulging members 28, 28... contact each other.
  • a notch 16 is provided on the connecting end portions 26, 26 of each end portion 21 so as to unify the inserted length of the end portion 21 by attaching the notch 16 to the edge of the insertion hole 11 when the end portion 21 is inserted into the insertion hole 11.
  • reinforcement members 40, 40... which project from the wall portions 24, 25 toward the opposing wall portions, are formed.
  • the connecting ends of opposed reinforcement members 40, 40... contact each other and shape-holding portions 41 for preventing the deformation of the opening ends 29 are provided by these contacted reinforcement members 40, 40....
  • the reinforcement members 40, 40... which project from the wall portions 24, 25 and which contact each other, support the wall portions 24, 25 along the cutting direction, and therefore, deformation of the wall portions 24, 25 is prevented by the shape-holding portions 41. Furthermore, the shapes of the opening ends 29 are maintained by preventing the deformation of the wall portions 24, 25, since the opening ends 29 are formed at the cutting surface of the end portions 21, and therefore, the end portions 21 are smoothly inserted and closely connected with the insertion holes 11.
  • the reinforcement members 40, 40... are composed of projections which are smaller than the bulging members 28, 28... because they are not designed for stirring the refrigerant which flows in the heat-exchange tube 20, and therefore, problems caused by sudden expansion/contraction of the refrigerant can be prevented if the reinforcement members 40, 40... are provided adjacent to the opening ends 29.
  • FIGs. 3 and 4 show a second embodiment of the heat exchanger of the present invention.
  • a heat-exchange tube 20 constitutes a main part of the heat exchanger denoted by the symbol "B" (refer to Fig. 11, for example) and comprises a pair of belt-shaped plates 22a, 22b which extend along the longitudinal direction of the heat-exchange tube 20.
  • a passage 27 for the refrigerant is provided between the plates 22a, 22b, by attaching connecting end portions 26a, 26b which project from both ends of plates 22a, 22b and extend along the longitudinal direction of the plates 22a, 22b.
  • an insertion end portion 50 in which the width thereof between the opposing connecting end portions 26a, 26b (the width between the opposing side walls of the heat-exchange tube 20) becomes narrower as it approaches the opening end 29, is provided on each end portion 21 of the heat-exchange tube 20.
  • a contacting portion 60 is provided on wall portions 24, 25 of the insertion end portion 50.
  • the contacting portion 60 is constructed of a pair of grooves 61, 62 which extends along the longitudinal direction of the heat-exchange tube 20. These grooves 61, 62 bulge toward the opposing wall portions 24, 25 at reference positions 24a, 25a on the wall portions 24, 25, and return to the reference positions 24a, 25a in roughly V-shaped sections.
  • the heights of the grooves 61, 62 are set to about one-fourth of the distance between the opposing wall portions 24, 25, and the width of the grooves 61, 62 are set to about one-tenth of the width between the opposing connecting end portions 26a, 26b.
  • the increased amount of the length along the perimeter of each end portion 21 resulting from the formation of the contacting portion 60 is about one-tenth of the original length along the perimeter of the end portion 21.
  • an insertion hole 11 in which the heat-exchange tube 20 is connected has a shape corresponding to the shape of the insertion end portion 50 in which the contacting portion 60 is provided. That is, the insertion hole 11 has the same shape as the sectional shape of the insertion end portion 50 when the insertion end portion 50 is cut along a surface which is parallel to the opening end 29 at a predetermined position.
  • a pair of notches 11a, 11b, in which the connecting end portions 26a, 26b are connected, is formed at both ends of the flat insertion hole 11, and a pair of chevron-shaped projections 111, 112, in which the grooves 61, 62 are connected, is formed on the top and bottom of the flat insertion hole 11.
  • the opening ends 29 are smaller than the insertion holes 11. Therefore, when the end portions 21 of the flat heat-exchange tubes 20 are cut along the surface which is perpendicular to the wall portions 24, 25 to form the opening ends 29, the end portions 21 are smoothly inserted into the insertion holes 11 even if the opening ends 29 are deformed along the cutting direction thereof. These deformations not only arise in the opening ends 29, but also in the end portions 21 in the vicinity of the opening ends 29; however, the deformed end portions 21 can be entirely inserted into the insertion holes 11 by including the entire deformed end portions 21 in the insertion end portions 50, and therefore, the end portions 21 are closely connected with the insertion holes 11 at the predetermined position.
  • the insertion holes 11 are larger than the opening ends 29 and smaller than the cross-sectional shape of the heat-exchange tubes 20, since the insertion holes 11 are formed in compliance with the insertion end portions 50. Therefore, the heat-exchange tubes 20 make contact with the insertion holes 11 at the insertion end portions 50, and the insertion end portions 50 are closely connected with the insertion holes 11. Furthermore, since the width between the opposing walls of each insertion end portion 50 enlarges as the distance from the opening end 29 increases, when a force is applied on each heat-exchange tube 20 in order to insert the heat-exchange tube 20 into the insertion hole more deeply, the insertion end portion 50 and the insertion hole 11 are elastically deformed, and the contact area between the insertion end portion 50 and the insertion hole 11 is increased. In addition, the insertion end portion 50, which presses against the insertion hole 11 in the enlarging direction, receives a reaction force which tightens the insertion end portion 50 in the insertion hole 11.
  • each insertion end portion 50 is not completely connected with the insertion hole 11 by reasons concerning their processing accuracy, for example, when complicated deformations such as a warp or distortion of the insertion end portion 50 which is not restricted a regular deformation in a certain direction or a defect of the insertion hole 11 which is caused by uneven cutting, exist, a point(s) at which the insertion end portion 50 and the insertion hole 11 is definitely contacted can be ensured on the contacting portion 60.
  • the grooves 61, 62 of the contacting portion 60 which bulge to form V-shaped sections have inclined surfaces, the grooves 61, 62 definitely contact the chevron-shaped projections 111, 112 of the insertion hole 11 at the inclined surface.
  • the increased amount of the length along the perimeter of the insertion end portion 50 by the formation of the contacting portion 60 is about one-tenth of the original length along the perimeter of the insertion end portion 50. Therefore, the amount of contact between the insertion end portion 50 and the insertion hole 11 is definitely increased due to the formation of the contacting portion 60.
  • the opening end 29 and end portion 21 adjacent to the opening end 29 which are deformed as a result of cutting, are smaller than the insertion hole 11, and therefore, the deformed end portion can be entirely inserted into the insertion hole 11.
  • the end portion 21 can be connected with the insertion hole 11 at the insertion end portion 50, and therefore, braze-welding between the insertion end portion 50 and the insertion hole 11 can be performed more properly, and the sealing performance of the heat exchanger B can be improved.
  • the numbers of contact points and the amount of contact between the insertion end portion 50 and the insertion hole 11 can be increased through the formation of the contacting portion 60. Therefore, braze-welding between the insertion end portion 50 and the insertion hole 11 can be performed more properly, and the sealing performance of the heat exchanger B can be improved.
  • each insertion end portion 50 since the width between the opposing walls of each insertion end portion 50 is enlarged as the distance from the opening end 29 increases, the insertion end portion 50, which presses against the insertion hole 11 in the enlarging direction, receives a reaction force which tightens the insertion end portion 50 in the insertion hole 11, and therefore, the deformation caused by the spring back force which acts to separate the wall portions 24, 25 which are positioned on the top and bottom facing each other, can be prevented. Consequently, braze-welding between each of the connecting portions 26a, 26a, 26b, 26b, and the opposing bulging members 28, 28... projecting from the end portion 21 of the heat-exchange tube 20 in which the fins 30 cannot be provided, can be performed more properly, and the sealing performance and resistance against the pressure of the heat exchanger B can be improved.
  • the grooves 61, 62 which bulge inwardly from the wall portions 24, 25 of each insertion end portion 50 are provided as the contacting portion 60; however, as shown in Figs. 5 and 6, bulging portions 63, 64 which bulge outwardly from the wall portions 24, 25 may be provided on the outer surface of each insertion end portion 50 as the contacting portion 60.
  • the bulging portions 63, 64 have roughly semicircular-shaped sections and sizes roughly the same as that of the grooves 61, 62 in their lengths, heights, and widths.
  • a pair of semicircular-shaped grooves 113, 114 in which the bulging portions 63, 64 are connected, is formed at the top and bottom of each insertion hole 11.
  • bulging portions 65, 66 which bulge outwardly from the wall portions 24, 25, may also be provided on the outer surface of each insertion end portion 50 as the contacting portion 60.
  • the bulging portions 65, 66 have wide top or bottom end surface and heights roughly the same as that of the bulging portions 63, 64.
  • a pair of notches 115, 116 which have shapes so as to connect with the bulging portions 65, 66, is formed at the top and bottom of each insertion hole 11.
  • curved portions 67, 68 which have curved surfaces curved inwardly toward the center portions of wall portions 24, 25 and which have heights roughly the same as that of the grooves 61, 62 may also be provided on the tip portion of each insertion end portion 50 as the contacting portion 60.
  • a pair of curved edges 117, 118, which have shapes so as to connect with the curved portions 67, 68, are formed at the top and bottom of each insertion hole 11.
  • an oval portion 69 which has a curved surface bulging outwardly from the outer surface of the wall portions 24, 25 along the perimeter thereof, may also be provided on the base portion of the insertion end portion 50, that is, the position at which the width of the insertion end portion 50 becomes equal to that of the heat-exchange tube 20, of each insertion end portion 50 as the contacting portion 60.
  • each insertion hole 11 forms an oval hole 119 in order to connect with the heat-exchange tube 20 closely at the point at which the oval portions 69 are formed.
  • the contacting portion 60 as described above is provided at the outer surface of each insertion end portion 50, even when complicated deformations such as a warp or distortion of the insertion end portion 50 which is not restricted a regular deformation in a certain direction or a defect of the insertion hole 11 which is caused by uneven cutting exist, a connection between the insertion end portion 50 and the insertion hole 11 can be performed more certainly. Furthermore, the increased amounts of the lengths along the perimeter of the insertion end portions 50 by the formation of the contacting portions 60 are about one tenth of the original lengths along the perimeter of the insertion end portions 50. Therefore, the amount of contact between each insertion end portion 50 and the insertion hole 11 is definitely increased through the formation of the contacting portion 60, braze-welding can be performed more properly, and the sealing performance of the heat exchanger B can be improved.
  • each insertion end portion 50 makes contact with the oval hole 119 on the oval portion 69 of the curved surface which faces the opening end 29, when the oval portion 69 is inserted into the oval hole 119, contact points between the oval portion 69 and the oval hole 119 are increased by the elastic deformation thereof as the insertion force of the oval portion 69 is increased as well as the reaction force from the oval hole 119 which tighten the oval portion 69, and therefore, the deformation due to a spring back force which separates the wall portions 24, 25 which are positioned on the top and bottom facing each other, can be prevented.
  • Figs. 15 and 16 show a third embodiment of the heat exchanger of the present invention.
  • a heat-exchange tube 20 constituting a main part of the heat exchanger denoted by the symbol "C" shown in Figs. 15 and 16 a corner 29a of the opening end 29 is partly cut off.
  • one of the connecting portions 26, 26 is outwardly extended and bent to form a U-shaped fastening plate 26c which fastens the connecting portions 26, 26.
  • the end of the opening end 29 which is deformed by cutting can be smoothly inserted into the insertion hole 11 because the width of the opening end 29 becomes narrower than the insertion hole 11 by cut-off of the comer 29a of the opening end 29. Then, the end portion 21 can be closely connected with the insertion holes 11, and therefore, braze-welding between the end portion 21 and the insertion hole 11 can be performed more properly, and the sealing performance of the heat exchanger C can be improved.
  • the area of the end portion 21 which is inserted into the header 10 through the insertion hole 1 and the amount of the inserted area in the pathway of the refrigerant when the header 10 along the longitudinal direction are decreased, and the loss of the refrigerant can be reduced in comparison with that of when the the comer 29a is not cut off.
  • the corner 29a of the opening end 29 is cut off in a straight line in this embodiment; however, a larger area can be cut off as long as the comer 29a is included. Furthermore, it is not necessary to cut off the opening end 29 in a straight line. As a result of these improvements, the opening end 29 which is deformed can be more smoothly inserted into the insertion hole 11 because the width of an end of the opening end 29 becomes more narrow, and the loss of the refrigerant can be reduced more.
  • Figs. 17 and 18 show a fourth embodiment of the heat exchanger of the present invention.
  • heat-exchange tubes 20 constituting the main parts of the heat exchanger denoted by the symbol "D" shown in Figs. 17 and 18, the contact ends of the opposing bulging members 28, 28... projecting from the end portions 21 of the heat-exchange tubes 20 in which the fins 30, 30... cannot be provided, are welded by laser, and these laser-welded bulging members 28, 28... provide a removal prevention member 70.
  • Figs. 19 and 20 show a fifth embodiment of the heat exchanger of the present invention.
  • heat-exchange tubes 20 constituting the main parts of the heat exchanger denoted by the symbol "E" shown in Figs. 19 and 20
  • a pair of projections which face each other are provided on the wall portions 24, 25 at the end portions 21 nearby.
  • Each upper projection has a hole 71 and each lower projection has a pipe member 72.
  • the end of the pipe member 72 which passes through the hole 71 is turned downward and caulked, and therefore, a caulked portion 73 is provided on the ends of the projections and the projections are fastened by this caulked portion 73.
  • the projections which are fastened by the caulked portion 73 provide a removal prevention member 70.
  • the projections of the wall portions 24, 25 are fastened by caulking the ends thereof; however, the projections may be also fastened by welding or by using a rivet, a stapler, or the like.
  • Figs. 21 and 22 show a sixth embodiment of the heat exchanger of the present invention.
  • heat-exchange tubes 20 constituting the main parts of the heat exchanger denoted by the symbol "F" shown in Figs. 21 and 22
  • a part of each lower wall portion 25 is extended from the opening end 29.
  • This extended part bends upward and toward the upper wall portion 24, and forms a fastening clip 74 which is fastened to the wall portion 24.
  • the fastening clip 74 which is formed at the opening end 29, provides a removal prevention member 70.
  • an opening which has a shape corresponding to the fastening clip 74 is provided at the upper end of each insertion hole 11 so as to engage with the fastening clip 74.
  • one of the shape-holding portions 41, the insertion end portions 50 having contacting portions 60, the opening ends 29 in which the comers 29a are partly cut off, or the removal prevention members 70, is provided, however, these means can be simultaneously provided within the same heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP01105273A 2000-03-06 2001-03-05 Echangeur de chaleur Withdrawn EP1132706A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000060914A JP2001248988A (ja) 2000-03-06 2000-03-06 熱交換器
JP2000060914 2000-03-06

Publications (2)

Publication Number Publication Date
EP1132706A2 true EP1132706A2 (fr) 2001-09-12
EP1132706A3 EP1132706A3 (fr) 2003-03-19

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US (1) US20010018970A1 (fr)
EP (1) EP1132706A3 (fr)
JP (1) JP2001248988A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2841641A1 (fr) * 2002-06-27 2004-01-02 Valeo Climatisation Tube comportant des moyens de maintien pour un echangeur de chaleur et echangeur de chaleur comportant un faisceau de tels tubes
EP1596149A2 (fr) * 2004-05-13 2005-11-16 Sanden Corporation Echangeurs de chaleur
FR2980839A1 (fr) * 2011-10-04 2013-04-05 Valeo Systemes Thermiques Plaque pour echangeur de chaleur et echangeur de chaleur muni de telles plaques
FR2989766A1 (fr) * 2012-04-19 2013-10-25 Valeo Systemes Thermiques Faisceau d'echange de chaleur pour echangeur de chaleur et echangeur de chaleur comprenant ledit faisceau
CN103502761A (zh) * 2011-02-18 2014-01-08 尼森斯公司 热交换器的制造方法和热交换器

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10214467A1 (de) * 2002-03-30 2003-10-09 Modine Mfg Co Abgaswärmetauscher für Kraftfahrzeuge
WO2006083442A2 (fr) * 2005-02-02 2006-08-10 Carrier Corporation Echangeur thermique a ecoulement parallele presentant une entree de canaux gaufree
JP2007212084A (ja) * 2006-02-10 2007-08-23 Denso Corp 熱交換器
JP5739603B2 (ja) * 2009-01-27 2015-06-24 株式会社小松製作所 熱交換器
DE102009032782A1 (de) * 2009-07-10 2011-01-13 Behr Industry Gmbh & Co. Kg Wärmetauscher, insbesondere für einen Verbrennungsmotor
JP5517745B2 (ja) * 2010-05-24 2014-06-11 サンデン株式会社 熱交換器用チューブ及び熱交換器
JP5663413B2 (ja) * 2011-06-17 2015-02-04 カルソニックカンセイ株式会社 サーペンタイン型熱交換器
JP5772608B2 (ja) * 2012-01-12 2015-09-02 株式会社デンソー 熱交換器
BR112015021634A8 (pt) * 2013-03-14 2019-11-19 Duramax Marine Llc conjunto de arrefecimento de quilha para uso em uma embarcação marítima e tubo de líquido de arrefecimento
KR101583921B1 (ko) * 2014-05-02 2016-01-11 현대자동차주식회사 차량용 열교환기 제조장치 및 제조방법
US10697568B2 (en) * 2014-09-25 2020-06-30 Mitsubishi Electric Corporation Refrigerant pipe, method of manufacturing the refrigerant pipe, and heat exchanger including the refrigerant pipe
US10697703B2 (en) 2014-12-02 2020-06-30 Duramax Marine, Llc Marine heat exchanger
CN111366013A (zh) * 2018-12-26 2020-07-03 浙江盾安热工科技有限公司 扁管及换热器
JP7230502B2 (ja) * 2018-12-27 2023-03-01 株式会社デンソー 熱交換器
CN112682500B (zh) * 2020-12-31 2023-05-26 南宁市安和机械设备有限公司 一种采用错位打点油冷器管制成的油冷器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335830A (ja) * 1989-07-03 1991-02-15 Calsonic Corp アルミニウム製熱交換器の製造方法
DE4340378A1 (de) * 1992-11-27 1994-06-01 Zexel Corp Wärmeaustauscher und Verfahren zur Herstellung derselben
GB2299037A (en) * 1995-03-22 1996-09-25 Behr Gmbh & Co Flat tube for a soldered heat exchanger and a method for its production

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58221393A (ja) * 1982-06-18 1983-12-23 Hitachi Ltd コルゲ−ト形熱交換器
US4458749A (en) * 1983-04-18 1984-07-10 Ex-Cell-O Corporation Radiator having reinforced tubes
JPH0612229B2 (ja) * 1986-07-29 1994-02-16 Ｑ洋ラジエ−タ−株式会社 熱交換器のチユ−ブ接合部
DE8801411U1 (de) * 1988-02-05 1988-03-24 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Wärmetauscher, insbesondere Wasser/Luft-Kühler aus Aluminium
DE4015830C2 (de) * 1990-05-17 2000-10-12 Behr Gmbh & Co Wärmetauscher, insbesondere Wasser/Luft-Kühler
US5046555A (en) * 1990-09-06 1991-09-10 General Motors Corporation Extended surface tube-to-header connection for condenser
JPH08145586A (ja) * 1994-11-24 1996-06-07 Zexel Corp 熱交換器用偏平チューブ
JP3433400B2 (ja) * 1995-02-17 2003-08-04 カルソニックカンセイ株式会社 突出穴部の成形方法
JPH09229584A (ja) * 1996-02-23 1997-09-05 Sanden Corp 熱交換器用チューブユニットおよびそれを用いた熱交換器
KR100261006B1 (ko) * 1996-07-03 2000-07-01 오타 유다카 열교환기용 편평튜우브
JPH10206079A (ja) * 1997-01-14 1998-08-07 Zexel Corp 熱交換器
JPH10332294A (ja) * 1997-06-03 1998-12-15 Calsonic Corp 熱交換器用チューブ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335830A (ja) * 1989-07-03 1991-02-15 Calsonic Corp アルミニウム製熱交換器の製造方法
DE4340378A1 (de) * 1992-11-27 1994-06-01 Zexel Corp Wärmeaustauscher und Verfahren zur Herstellung derselben
GB2299037A (en) * 1995-03-22 1996-09-25 Behr Gmbh & Co Flat tube for a soldered heat exchanger and a method for its production

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2841641A1 (fr) * 2002-06-27 2004-01-02 Valeo Climatisation Tube comportant des moyens de maintien pour un echangeur de chaleur et echangeur de chaleur comportant un faisceau de tels tubes
EP1596149A2 (fr) * 2004-05-13 2005-11-16 Sanden Corporation Echangeurs de chaleur
EP1596149A3 (fr) * 2004-05-13 2006-10-25 Sanden Corporation Echangeurs de chaleur
CN103502761A (zh) * 2011-02-18 2014-01-08 尼森斯公司 热交换器的制造方法和热交换器
FR2980839A1 (fr) * 2011-10-04 2013-04-05 Valeo Systemes Thermiques Plaque pour echangeur de chaleur et echangeur de chaleur muni de telles plaques
WO2013050393A1 (fr) * 2011-10-04 2013-04-11 Valeo Systemes Thermiques Plaque pour échangeur de chaleur et échangeur de chaleur muni de telles plaques
CN103975215A (zh) * 2011-10-04 2014-08-06 法雷奥热***公司 用于热交换器的板和装备有这种板的热交换器
FR2989766A1 (fr) * 2012-04-19 2013-10-25 Valeo Systemes Thermiques Faisceau d'echange de chaleur pour echangeur de chaleur et echangeur de chaleur comprenant ledit faisceau

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Publication number Publication date
US20010018970A1 (en) 2001-09-06
JP2001248988A (ja) 2001-09-14
EP1132706A3 (fr) 2003-03-19

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