EP1435503B1 - Echangeur de chaleur et ensemble échangeur de chaleur pour véhicules automobiles - Google Patents

Echangeur de chaleur et ensemble échangeur de chaleur pour véhicules automobiles Download PDF

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Publication number
EP1435503B1
EP1435503B1 EP04008664A EP04008664A EP1435503B1 EP 1435503 B1 EP1435503 B1 EP 1435503B1 EP 04008664 A EP04008664 A EP 04008664A EP 04008664 A EP04008664 A EP 04008664A EP 1435503 B1 EP1435503 B1 EP 1435503B1
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EP
European Patent Office
Prior art keywords
heat exchanger
tube
flow
wall sections
tube ends
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.)
Expired - Lifetime
Application number
EP04008664A
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German (de)
English (en)
Other versions
EP1435503A2 (fr
EP1435503A3 (fr
Inventor
Franco Ghiani
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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Filing date
Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1435503A2 publication Critical patent/EP1435503A2/fr
Publication of EP1435503A3 publication Critical patent/EP1435503A3/fr
Application granted granted Critical
Publication of EP1435503B1 publication Critical patent/EP1435503B1/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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082—Charged air coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0091—Radiators
    • F28D2021/0094—Radiators for recooling the engine coolant
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F28F2009/004—Common frame elements for multiple cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/16—Fastening; Joining with toothed elements, e.g. with serrations

Definitions

  • the invention relates to a heat exchanger for a motor vehicle with a rib / tube block, the flat tubes are provided on opposite sides with such expanded tube ends that abutting, adjacent wall sections of the tube ends lie flat against each other and the tube ends are aligned in a row, wherein the tube ends on both sides in each case a flow box is flush mounted with corresponding longitudinal wall sections of the pipe ends, and a heat exchanger assembly for a motor vehicle with at least two in the flow direction successively arranged heat exchangers.
  • a heat exchanger which has a rib / tube block with flat tubes whose tube ends are widened to rectangular cross sections.
  • the tube ends are flared so that they lie flat against each other with their transverse to the longitudinal direction of attached flow boxes Wandungsabschnitten, and that the respective lateral, longitudinal wall sections of the pipe ends are aligned and flush with the corresponding wall portions complete the attached flow boxes.
  • the flow boxes serve as collection or distribution boxes.
  • the non-prepublished patent application also discloses a heat exchanger arrangement with two heat exchangers, one of which is designed as a vehicle radiator and the other as a capacitor. These two heat exchangers are arranged directly behind one another in the throughflow direction of the air and are connected to one another by corresponding connecting means in the region of the respective flow boxes.
  • the object of the invention is to provide a heat exchanger and a heat exchanger arrangement of the type mentioned, which enable a reliable production and a simple and space-saving design.
  • this object is achieved in that densely mated sections of individual components of the heat exchanger are solder plated for a common soldering and the corners of the expanded pipe ends are provided with radii between 0 and 2 mm, so that between adjacent pipe ends and side walls of the respective flow box remain tightly filled by flowing solder joints.
  • inventively sized radii remain between adjacent pipe ends and side walls of the flow boxes only very narrow joints that are completely and tightly filled in the soldering oven by flowing solder.
  • the adjacent, transverse wall sections of the pipe ends abut each other in a form-fitting manner. This makes it possible to achieve an exact alignment and fixation of the pipe ends to each other during the pre-assembly of the heat exchanger, ie before the soldering of the individual components. Tolerances due to a lateral offset of individual pipe ends can be avoided.
  • the positive engagement of the wall sections together also results in an enlarged contact surface, which has an increased security of the solder joint result.
  • the flow boxes facing, lijnsverêtnden Wanduhgsabitese the pipe ends are positively against corresponding wall portions of the flow boxes.
  • the pre-assembly of the heat exchanger is further improved, since the flow boxes - relative to their longitudinal direction - are positioned exactly positioned on the pipe ends and can be kept fixed in the longitudinal direction by the positive engagement.
  • the positive-locking system ensures an enlarged contact surface area, which further improves the tightness and safety of the subsequent solder joint between the flow boxes and the pipe ends.
  • the corners of the flared pipe ends are provided with radii between 0 and 2 mm.
  • the widened tube ends preferably have a rectangular shape, which according to the embodiments described above may additionally be provided with correspondingly deformed wall sections.
  • the preferred radii ensure that only extremely narrow gaps remain between the adjacent pipe ends even in the region of the outer sides, which can be completely filled by the solder during the soldering operation, so that the dense solder joint is ensured with one another and in particular with the lateral wall regions of the flow boxes.
  • the pipe ends are each expanded asymmetrically to the central longitudinal planes of the associated flat tubes. This makes it possible to realize special arrangements of the components of the heat exchanger, without affecting the safe operation of the heat exchanger.
  • each tube end corresponds to the circumference of the associated flat tube plus or minus 30%.
  • the negative relation between the circumference of each flat tube and the circumference of the associated, flared tube end results in particular by a partially double-walled folding of the wall of the tube ends.
  • the adjacent pipe ends facing transverse wall sections have a height between 0.3 and 2 times a pitch the flat tubes, namely 0.3T ⁇ H 1 ⁇ 2T on. This preferred dimensioning allows a secure tight connection between the pipe ends and sufficient stability of the entire fins / tube block.
  • the flat tubes are aligned obliquely relative to the axis of symmetry of the expanded tube ends.
  • a special arrangement of the heat exchanger in a motor vehicle is also possible with this design, wherein, in particular, an oblique arrangement of the heat exchanger within an engine compartment of the motor vehicle - relative to the normal direction of travel of the motor vehicle - is advantageous.
  • the object of the invention is achieved in that the at least two heat exchangers on opposite sides in each case a common side part is assigned.
  • a common side part is assigned to the common side parts.
  • the flow boxes are designed to be open by at least one heat exchanger in their side areas, and the opposite side parts are each provided with at least one corresponding end portion which protrude into the respective side regions of the flow boxes and seal them tight. This makes it possible to make the flow boxes simple, as they can be thermoformed as a simple U-profiles.
  • the at least two heat exchangers have in common, over the total depth of the ribs / tube block extending ribs.
  • the flow boxes of the at least two heat exchangers are provided with connecting pieces, which are aligned parallel to each other and curved in the same direction.
  • connecting pieces which are aligned parallel to each other and curved in the same direction.
  • insulating gaps are arranged between the tubes and / or the flow boxes. These insulation gaps serve for the thermal insulation of the adjacent heat exchangers against each other, wherein the insulation gaps preferably separate the tubes from each other over their entire length up to the respective flow boxes. However, this embodiment also detects insulation gaps, which are provided only in sections between the adjacent pipes and / or flow boxes. The insulation gaps have preferred widths between 1 and 10 mm.
  • a heat exchanger assembly 1 for a motor vehicle has a first heat exchanger in the form of a water / air cooler, a second heat exchanger in the form of a charge air cooler and a third heat exchanger in the form of a capacitor.
  • the three heat exchangers are arranged parallel to each other transversely to the vehicle longitudinal direction in an engine compartment of the motor vehicle, so that they are arranged one behind the other in the direction of flow of the airstream in the normal direction of travel of the motor vehicle.
  • the water / air cooler has an in Fig.
  • the condenser is positioned, which has an upper flow box 13 and a lower flow box 14 and a between these flow boxes 13, 14 extending and unspecified ribs / tube block.
  • Each flow box 13, 14 is formed by two half-shells assembled to form a round hollow-chamber profile, one half-shell each representing a bottom of the respective flow box 13, 14 and provided with indentations for tight connection to tube ends of the flat tubes.
  • the side flow boxes 13, 14 are each sealed by a lid insert.
  • Both the ribs / tube block of the intercooler and the fins / tube block of the water / air cooler are composed of a plurality of mutually parallel flat tubes and between 'these arranged corrugated fins.
  • the opposite pipe ends of the flat tubes are each widened rechtkkig, so that the pipe ends according to Fig. 1 in each case in a row with their viewed in the longitudinal direction of the flow boxes transverse wall sections lying flat and close to each other.
  • the longitudinal wall sections of the flared pipe ends each extend in alignment with each other.
  • At these longitudinal wall portions of the tube ends, which respectively form the outer sides of the rib / tube block, are corresponding, longitudinal Wall areas of the flow boxes flat and flush at the end.
  • the expanded tube ends thus directly form the "bottoms" of the flow boxes, so that the additional provision of soils in the region of the flow boxes is avoided.
  • the described construction of the heat exchanger corresponds to the design of the pipe ends and the placement of the flow boxes, as in the not previously published DE 195 43 986.4 is described.
  • the flow boxes of both the intercooler and the water / air cooler are each designed to be open at their opposite side areas.
  • the lateral conclusion of these side areas of the flow boxes each take a final section 15, 16, 18, 19 of a side part 11, 12, which extends integrally over the entire depth of the heat exchanger assembly and thus over all three heat exchanger.
  • the two side parts 11, 12 limit the ribs / tube blocks of the water / air cooler, the intercooler and the condenser on opposite sides.
  • the end portions 15, 16, 18, 19 of each side part 11, 12 protrude in extension of the side parts in each case in the side regions of the flow boxes inside, the outer contours of the end portions 15, 16, 18, 19 respectively adapted to the inner contours of the side regions of the flow boxes are, so that there is a circumferentially sealed system of the end portions 15, 16, 18, 19 at the corresponding inner walls of the flow boxes.
  • the two side parts 11, 12 are used for mounting the heat exchanger assembly from opposite sides of the ribs / tube blocks and at the same time with their end sections 15, 16, 18, 19 axially - relative to the longitudinal direction of the flow boxes - used in the flow boxes.
  • a tensioning device such as straps or the like
  • the entire heat exchanger assembly including the side parts 11, 12 in the transverse direction of the ribs / tube blocks is loaded under pressure and then soldered tight in a common soldering process.
  • the prerequisite for this is, of course, that all components of the heat exchanger assembly 1 made of sheet metal, preferably an aluminum alloy, are made. At least the respective sections of the individual components of the heat exchanger arrangement which are to be joined together are solder-plated accordingly.
  • holding claws are respectively provided at the opposite end edges of the flow boxes, according to the embodiment Fig. 7 are provided with the reference numeral 26. These are bent inwardly after the axial insertion of the end portions of the side parts 11, 12, wherein they engage in corresponding recesses of the contact webs of the end portions 15, 16, 18, 19. Even without the described tensioning device, a fixation of the flow boxes of the charge air cooler and of the water / air cooler relative to the associated ribs / pipe blocks and relative to the side parts 11, 12 is thus already achieved via the side parts 11, 12.
  • Fig. 5 results from the direct placement of the flow boxes on the flared pipe ends on the one hand and the provision of common, each one-piece side parts 11, 12 on the other hand an extremely slender, compact construction of the heat exchanger assembly, wherein between the individual flat tubes 21, 22, 24 of the capacitor , the intercooler and the water / air cooler and thus remain between the respective ribs / pipe blocks only extremely small distances. Since the charge air cooler and the water / air cooler are separated from one another in the region of the flow boxes, good thermal insulation results between the adjacent flow boxes in these areas.
  • the flat tubes 21 of the capacitor protrude through a bottom 20 of the associated flow box 13 and are fixed by means of this bottom 20 in the flow box 13.
  • Another heat exchanger assembly according to the Fig. 6 to 8 has only two successively arranged heat exchanger, of which one is designed as a water / air cooler and the other as a capacitor.
  • the water / air cooler corresponds in its construction to the previously based on the Fig. 1 to 5 described in detail water / air cooler of the heat exchanger assembly 1, so that no further explanation is necessary for this purpose.
  • the water / air cooler and the condenser are also associated on opposite sides of two common side parts 12a, which are basically designed according to the side parts 11 and 12, but designed for only two heat exchangers.
  • Each side part 12a has only one end portion 16a for the respective side region of the water box of the water / air cooler, which analogous to the 'embodiment according to the Fig. 1 to 5 fixed with the help of retaining claws 26 in the side areas and then sealed with the water boxes, soldered.
  • the compact design of the heat exchanger assembly and the analog design to the heat exchanger assembly to Fig. 1 to 5 is the rest of the drawings Fig. 6 to 8 removable, wherein the same reference numerals were used for the same components, only with the addition of the letter a.
  • Fig. 9 is a heat exchanger arrangement similar to the Fig. 6 to 8 shown in sections, which preferably also composed of a water / air cooler and a capacitor.
  • this heat exchanger assembly has a common ribs / tube block, in which the flat tubes 21b of the capacitor on the one hand and the flat tubes 24b of the water / air cooler on the other hand are separated from each other, but the common and over the entire depth of the heat exchanger assembly continuous corrugated 27th having.
  • the corrugated fins 27 thus have the same width as the side parts 12b which likewise extend over the entire heat exchanger arrangement.
  • the heat exchanger assembly according to Fig. 10 is analogous to the heat exchanger arrangement according to Fig. 9 also provided with a common ribs / tube block, wherein corrugated fins 28 extend over the entire depth of the heat exchanger assembly.
  • three heat exchangers preferably in the form of a water / air cooler, an intercooler and a condenser, combined in the heat exchanger assembly and by each over the entire depth of the heat exchanger assembly continuous, one-piece side parts 12c analogous to the embodiment of the Fig. 1 to 5 held together.
  • the flat tubes 24c of the first heat exchanger, the flat tubes 22c of the second heat exchanger and the flat tubes 21c of the third heat exchanger are thus arranged at short distances from each other.
  • these flat tubes 21c, 22c, 24c are in each case parallel between these and extending over the entire width all flat tubes 21c, 22c, 24c extending corrugated fins 28 connected to each other.
  • the heat exchanger assembly 29 according to Fig. 11 corresponds in its structure basically the embodiment of the Fig. 1 to 5 or Fig. 10 ,
  • a water / air cooler has flat tubes 30 of a ribs / tube block, not shown, on the expanded tube ends directly water tanks 35 are placed.
  • the water boxes 35 are identical and designed symmetrically to each other and each have a connection piece 37, which according to the illustration Fig. 11 parallel to each other in the same direction.
  • the intercooler has analogous to the water / air cooler designed flat tubes 31 of an associated ribs / tube block, auf'deren expanded tube ends on opposite sides in each case an air box 34 is placed.
  • the air boxes 34 on the opposite sides of the intercooler are identical and designed symmetrically to each other, both air boxes each having a manifold, which is curved in each case above or below the respective water tank 35 so symmetrical to the water / air cooler that the used Connecting piece 36 are aligned parallel to the connecting piece 37 of the water / air cooler.
  • the condenser which is composed of flow boxes 33 and a flat tubes 32 having ribs / tube block is also constructed symmetrically to a median transverse plane (shown in phantom) of the heat exchanger assembly.
  • the individual heat exchanger after Fig. 11 are corrugated fins extending through common side parts and / or over the entire depth of the heat exchanger assembly 29 to a total block analogous to the embodiments described above firmly connected.
  • all components of the heat exchanger and the heat exchanger assembly are made for soldering in a common soldering process of metal.
  • the heat exchanger arrangements according to 8 to 11 have on the one hand flow boxes (water tank 2a and flow box 13a after Fig. 8 and water tank 35, air box 34 and flow box 33 after Fig. 11 ), which are separated from each other by insulation gaps SP 1 , SP 4 . It is between the water tank 2a and the flow box 13a after Fig. 8 only a narrow insulation gap SP 1 of about 1 mm provided, the insulation gap between the water tank 35 and the air box 34 is designed much larger. The insulation gaps should avoid heat transfer between the different hot or hot flow boxes during operation.
  • insulation gaps SP 2 are provided between the tubes 21b, 24b, as well as insulation gaps SP 2 and SP 3 between the tubes 21c, 22c, 24c, which serve for thermal insulation of the adjacent tube blocks ( Fig. 9, 10th ).
  • Insulation column SP 2 , SP 3 between the tubes 31, 32 and 30, 31 is provided.
  • All insulation gaps have a width between 1 mm and 10 mm.
  • a heat exchanger as disclosed with reference to the water / air cooler and the intercooler of the embodiments described above, may have various details, resulting in a heat exchanger with a fundamentally already described construction, the following reference to the Fig. 12 to 27 listed embodiments result. These details, either alone or in an optional combination, can give the respective embodiments of heat exchangers.
  • Fig. 12 the flared tube ends of the fin / tube block of a heat exchanger, as previously described in principle, provided with a rectangular bulge A, as shown in Fig. 20 is shown.
  • the width L ( Fig. 14 ) of the longitudinal wall sections of each upturn A is less than the width B 2 (FIG. Fig. 14 ) of the associated flat tubes.
  • the longitudinal wall sections extending in the longitudinal direction of the flow boxes have a width B 1 which corresponds to the pitch T of the fin / tube block.
  • the height H 1 of the transverse wall sections of the bulges A which corresponds to the height der'vanidization these wall sections together, is between 0.3 and 2 times the pitch T of the rib / tube block, the selection of this range depending on respective requirements of the Heat exchanger is selected.
  • each bulge A between the normal flat tube cross-section and the respective end face of the flared tube end has an angle of inclination W - to the surface of the transverse wall portion of the bulge A - on which between 5 ° and 90 °, but preferably between 25 ° and 65 ° lies.
  • the transition region either as an inclined plane or only as a direct connection of two radii - from the flat tube on the one hand and from the bulge forth on the other hand - be provided.
  • the inclination angle W is then determined by the common tangent of the two radii. How out Fig. 15 is recognizable, the height H 2 of the longitudinal wall sections of each bulge A, the.
  • the degree of bulge is defined, inter alia, by the ratio of the sizes of the bulge A on the one hand and the associated flat tube F on the other.
  • the scope of the bulge A is dimensioned according to preferred embodiments so that it corresponds to the circumference of the associated flat tube F plus or minus 30%.
  • the corners of the rectangular bulges A of the flat tubes preferably have an outer radius R a and an inner radius R i (FIG. Fig. 16 ), which are between 0 and 2 mm.
  • the outer radius R a is so dimensioned that remain only very narrow joints between the adjacent pipe ends and the side walls of the flow boxes, which are completely and tightly filled in the soldering oven by the flowing solder.
  • the tube ends of the flat tubes F of the ribs / tube block are expanded asymmetrically, resulting in a center longitudinal plane of each flat tube F offset bulges A S.
  • the adjacent bulges A S are according to Fig. 13 put together to achieve the mutual tight connection.
  • the flat tubes form either according to the flat tube F 1 of FIG. 19 a single, continuous flow channel, or are according to the embodiment of the FIGS. 14 to 18 provided with two separate flow channels (F S1 , F S2 ), wherein the illustrated flat tube F is designed by corresponding longitudinal corrugations N on opposite sides.
  • the two flow channels can also be created by a correspondingly extruded aluminum profile. In an embodiment of the invention, not shown, more than two flow channels are provided in a flat tube.
  • the "bottomless" heat exchanger where flow boxes are placed directly on the expanded tube ends of the fin / tube block, continue to improve.
  • a positive fixation of the expanded pipe ends to each other transversely to the longitudinal direction of the flow boxes not shown, achieved by a corresponding shaping of the transverse wall sections of the flared pipe ends A 1 , A 2 , A 3 and A 6 .
  • the wall sections are correspondingly arcuately curved.
  • they are wavy curved.
  • FIG. 23 have arcuate curvatures extending between rectilinear webs of the wall sections.
  • FIG. 26 The wall sections are also wavy, wherein the waveform extends to the transverse side wall portions and does not transition into rectilinear webs, as in the embodiment according to Fig. 22 the case is.
  • FIGS. 24 and 25 are the transverse wall portions of the flared pipe ends A 4 and A 5 over the embodiment according to Fig. 20 unchanged straight and flat.
  • For the longitudinal side wall sections are V-shaped expanded outwards.
  • the corresponding wall portions S 1 of the attached flow box zigzag-shaped, so that there is a positive engagement in the longitudinal direction of the flow box between the widened pipe ends A 4 and the wall regions of the respective flow box 1.
  • Fig. 25 instead of a V-shaped widening, a wave-shaped widening of the longitudinal-side wall sections of the widened tube ends A 5 is provided.
  • the corresponding wall regions of the flow box S 2 are curved in an undulating manner, whereby a positive connection between the flow box S 2 and the pipe ends A 5 results in the same way, as in the exemplary embodiment according to FIG Fig. 24 ,
  • Fig. 27 are the bulges A of the flat tubes F 2 obliquely, preferably approximately diagonally, offset from the central longitudinal planes of the flat tubes F 2 , resulting in the flush juxtaposition of the tube ends the parallel and oblique orientation of the flat tubes F 2 shown .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Claims (19)

  1. Échangeur de chaleur pour un véhicule automobile comprenant un bloc tubulaire à ailettes (4), dont les tubes plats (30) sont prévus sur des côtés opposés avec des extrémités de tube (A) élargies de telle sorte que des parties de paroi, agencées transversalement et voisines les unes les autres, des extrémités de tube (A) sont disposées les unes contre les autres à plat et les extrémités de tube (A) sont alignées entre elles dans une rangée, un caisson d'écoulement (35) étant posé sur chacune des deux extrémités de tube (A) sur les deux côtés en se terminant en affleurement avec des parties de paroi correspondantes des extrémités de tube (A), agencées dans la longueur, caractérisé en ce que des parties à assembler de manière étanche des composants individuels de l'échangeur de chaleur sont doublées de brasure pour un processus de brasage commun et les angles des extrémités de tube (A) élargies sont pourvus de rayon (Ri, Ra) compris entre 0 et 2 mm de sorte qu'entre des extrémités de tube (A) voisines et des parois latérales du caisson d'écoulement (35) respectif restent des joints très étroits qui sont complètement remplis de manière étanche par la brasure s'écoulant.
  2. Échangeur de chaleur selon la revendication 1, caractérisé en ce que les parties de paroi, voisines les unes les autres et agencées transversalement, des extrémités de tube (A1, A2, A3, A6) s'appuient par complémentarité de forme les unes sur les autres.
  3. Échangeur de chaleur selon la revendication 1 ou 2, caractérisé en ce que les parties de paroi, tournées vers les caissons d'écoulement (S1, S2) et agencées dans la longueur, des extrémités de tube (A4, A5) s'appuient par complémentarité de forme sur des zones de paroi correspondantes des caissons d'écoulement (S1, S2) .
  4. Échangeur de chaleur selon la revendication 1, 2 ou 3, caractérisé en ce que les parties de paroi, tournées les unes vers les autres et agencées transversalement, des extrémités de tube (A2) voisines sont pourvues de courbures correspondantes entre elles, de forme ondulée ou de forme arquée.
  5. Échangeur de chaleur selon la revendication 3 ou 4, caractérisé en ce que les parties de paroi agencées dans la longueur des extrémités de tube (A4, A5) sont pourvues chacune d'au moins une courbure ou d'un angle dépassant de l'alignement des parties de paroi et en ce que les zones de paroi attribuées des caissons d'écoulement (S1, S2) sont agencées avec une courbure ou une dentelure opposée et appropriée.
  6. Échangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que les extrémités de tube (A5) sont élargies respectivement de façon asymétrique par rapport à un plan médian du tube plat (7) attribué.
  7. Échangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que le pourtour de l'élargissement (A) de chaque extrémité du tube correspond au pourtour du tube plat (F, F1) attribué plus ou moins 30 %.
  8. Échangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une zone de transition entre l'élargissement de l'extrémité de tube et une enveloppe de tube plat est inclinée dans un angle (W) compris entre 5° et 90°, de préférence entre 25° et 65°, par rapport à la partie de paroi côté transversal de l'élargissement.
  9. Échangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'extension (L) des parties de paroi agencées transversalement est plus faible que la largeur (B2) des tubes plats.
  10. Échangeur de chaleur selon l'une quelconque des revendication précédentes, caractérisé en ce que les parties de paroi agencées transversalement et tournées vers les extrémités de tube voisines présentent une hauteur (H1) comprise entre 0,3 et 2 fois un espacement de graduation (T) des tubes plats, c'est-à-dire 0,3 T ≤ H1 ≤ 2T.
  11. Échangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que la hauteur (H2) des surfaces de brasage des parties de paroi agencées longitudinalement et tournées vers le bac collecteur (S) est plus faible que la hauteur (H1) des parties de paroi agencées transversalement.
  12. Échangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que les tubes plats (F2) sont orientés et agencés en biais par rapport à des axes de symétrie des élargissements (A) des extrémités de tube.
  13. Dispositif d'échange de chaleur pour un véhicule automobile avec au moins deux échangeurs de chaleur disposés l'un derrière l'autre dans le sens d'écoulement selon la revendication 1, caractérisé en ce qu'une partie latérale (11, 12, 12a) commune est attribuée respectivement à au moins deux échangeurs de chaleur sur des côtés opposés.
  14. Dispositif d'échange de chaleur selon la revendication 13, caractérisé en ce que les caissons d'écoulement (2, 3, 5, 6, 2a) d'au moins un échangeur de chaleur sont conçus de façon ouverte dans leurs zones latérales et en ce que les parties latérales (11, 12, 12a) opposées sont pourvues chacune d'au moins une partie de fermeture correspondante, lesquelles dépassent dans les zones latérales respectives des caissons d'écoulement (2, 3, 5, 6, 2a) et ferment ces caissons de façon étanche.
  15. Dispositif d'échange de chaleur selon la revendication 14, caractérisé en ce que les contours extérieurs des parties de fermeture sont adaptés aux contours intérieurs correspondants des zones latérales des caissons d'écoulement (2, 3, 5, 6, 2a).
  16. Dispositif d'échange de chaleur selon le préambule de la revendication 13 ou selon l'une quelconque des revendications 13 à 15, caractérisé en ce que les au moins deux échangeurs de chaleur présentent des ailettes (27, 28) communes et s'étendant sur toute la profondeur du bloc tubulaire à ailettes
  17. Dispositif d'échange de chaleur selon le préambule de la revendication 13 ou selon l'une quelconque des revendications précédentes, caractérisé en ce que les tubes plats (F) d'au moins un bloc tubulaire à ailettes forment respectivement au moins deux canaux d'écoulement (Fs1, Fs2) parallèles entre eux.
  18. Dispositif d'échange de chaleur selon le préambule de la revendication 13 ou selon l'une quelconque des revendications précédentes, caractérisé en ce que les caissons d'écoulement (34, 35) d'au moins deux échangeurs de chaleur sont pourvus de tubulures de raccordement (36, 37) qui sont incurvées parallèlement entre elles et dans le même sens.
  19. Dispositif d'échange de chaleur selon l'une quelconque des revendications 13 à 18, caractérisé en ce que des fentes d'isolation (SP1, SP2, SP3, SP4) sont disposées entre les tubes (21b ; 24b ; 21c, 22c, 24c ; 30, 31, 32) et/ou les caissons d'écoulement (2a, 13a ; 33, 34, 35).
EP04008664A 1997-05-27 1998-04-23 Echangeur de chaleur et ensemble échangeur de chaleur pour véhicules automobiles Expired - Lifetime EP1435503B1 (fr)

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DE19722097A DE19722097A1 (de) 1997-05-27 1997-05-27 Wärmeübertrager sowie Wärmeübertrageranordnung für ein Kraftfahrzeug
DE19722097 1997-05-27
EP98107377A EP0881447B1 (fr) 1997-05-27 1998-04-23 Echangeur de chaleur et dispositif d'échange de chaleur pour véhicule automobile

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EP98107377A Division EP0881447B1 (fr) 1997-05-27 1998-04-23 Echangeur de chaleur et dispositif d'échange de chaleur pour véhicule automobile

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EP1435503A2 EP1435503A2 (fr) 2004-07-07
EP1435503A3 EP1435503A3 (fr) 2005-10-26
EP1435503B1 true EP1435503B1 (fr) 2009-02-11

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Also Published As

Publication number Publication date
JPH1114271A (ja) 1999-01-22
EP0881447B1 (fr) 2004-08-18
DE19722097A1 (de) 1998-12-03
EP0881447A3 (fr) 1999-06-23
US6012512A (en) 2000-01-11
EP1435503A2 (fr) 2004-07-07
DE59814344D1 (de) 2009-03-26
ES2226025T3 (es) 2005-03-16
EP0881447A2 (fr) 1998-12-02
EP1435503A3 (fr) 2005-10-26
DE59811818D1 (de) 2004-09-23

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