US20070012432A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US20070012432A1
US20070012432A1 US10/556,840 US55684004A US2007012432A1 US 20070012432 A1 US20070012432 A1 US 20070012432A1 US 55684004 A US55684004 A US 55684004A US 2007012432 A1 US2007012432 A1 US 2007012432A1
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United States
Prior art keywords
diverting
heat exchange
hollow
distributing
medium
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Abandoned
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US10/556,840
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English (en)
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Peter Hampel
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Individual
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Individual
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    • 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
    • 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
    • F28D1/05375—Assemblies of conduits connected to common headers, e.g. core type radiators with particular pattern of flow, e.g. change of flow direction
    • 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
    • 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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • 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
    • 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
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box

Definitions

  • the invention relates to a novel gas and/or liquid heat exchanger with heat exchange tubes and fins arranged in between.
  • heat exchangers of this type high production costs are incurred in particular in the manufacture of small series, because of an ever increasing amount of manual work and degree of skill of the production personnel and owing to the resultant higher number of rejects.
  • the latter are connected to one another by means of tube bends or the like, which are fastened to the ends of the tubes, usually soldered onto them.
  • Typical applications are heat exchangers for cooling, heating and air conditioning devices of all kinds.
  • the highly diversified market comprises a large number of system manufacturers for “industrial air conditioning” or for customized cooling and/or heating systems.
  • heat exchangers for the exchange of heat between gases, usually air, and liquids, such as in particular water, oil or coolant
  • the liquids are supplied and discharged through a system of pipes, usually at least one distributing pipe and at least one collecting pipe, which are mechanically and hydraulically connected to one another by a plurality of heat exchange tubes.
  • the gas usually air, flows over fins, which are indirectly in contact with the heat exchange liquid system or circuit.
  • Flat tubes have advantages as heat exchange tubes because of the good surface/volume ratio and are therefore used in large quantities in heat exchangers in automotive engineering.
  • round tubes are favorably used.
  • DE 101 03 584 A1 describes a heat exchanger with a heat exchanger body comprising flat tubes that are widened at their ends and soldered together there and fins arranged in between.
  • This heat exchanger body is respectively closed off in the upward and downward directions by a distributing tank and a collecting tank, which are attached to it in a sealing manner and through which the heat transfer fluid is respectively supplied and discharged.
  • Specific conduction of the heat transfer medium in a way individually suited to the heat exchange tubes is not possible with these heat exchangers, which also have other major disadvantages, such as the use of plastic parts.
  • the present invention has set itself the object of providing a heat exchanger, in particular made of aluminum material, in which the previously customary constrained flow conduction by means of connecting lines, tube bends or the like, routed outside the heat exchanger body, between the heat exchange tubes is relocated into the distributing pipe and the collecting pipe themselves, and in this way the great effort required for manipulation during soldering, with all the disadvantages involved, can be replaced by a method of production that requires either only few manipulations or is automated entirely.
  • the subject matter of the invention is consequently a heat exchanger according to the precharacterizing clause of claim 1 , the invention consisting in that the heat exchanger has the features mentioned in the characterizing clause of claim 1 .
  • an insert with medium diverting chambers which is to be arranged or is arranged in a distributing pipe and collecting pipe, as known for example from customary heating radiators, takes the place of a large number of tube bends which connect the ends of the heat exchange tubes to one another and are to be attached or are attached fluid-tightly to said ends, said insert taking over the function of the fluid diverting tube bends or the like described above that have previously been used for the respectively desired constrained conduction of the heat exchange medium from heat exchange tube to heat exchange tube.
  • the novel heat exchangers allow production in which there is no longer any need for the previously laborious manual work involved in soldering, welding or adhesive bonding of a large number of connecting pipe pieces to the heat exchange tubes, which significantly reduces the production costs in particular in the case of materials that are complex, and consequently costly, to connect, such as aluminum, high-grade steel or the like. Furthermore, the novel type of construction of the heat exchangers makes appropriate and easily accomplished automation possible, simplifies manufacture and in this way dispenses with the need for much of the manual work, which is never entirely free from errors.
  • each of the diverting chambers is arranged at the correct location —correct in each case for the transfer and diversion of the heat exchange medium from one heat exchange tube into the next in accordance with a respectively provided medium conduction concept.
  • the diverting chambers for the heat exchange medium are arranged on a common connecting strut, which at the same time forms a kind of dividing wall dividing the diverting chambers in the throughflow direction, a particularly favorable flow of the heat exchange medium can be achieved, whereby energy savings are accomplished in respect of the heat exchange medium recirculation-pumping device.
  • the heat exchange medium diverting chambers are constructed in such a way that their contour respectively coincides substantially with the inner cross-sectional contour of the distributing and diverting cavity and the collecting and diverting cavity, as disclosed in detail by claim 4 .
  • the contours of the diverting chambers take up for example only approximately that half of the inner cross section of said cavities where the heat exchange tubes leave or enter, and the rest of the cross-sectional area of the distributing cavity is indeed available as a collecting cavity for the return of the heat exchange medium to a heat exchange medium discharge, which in this case is then arranged for example above the heat exchange medium supply.
  • the inner cross section of the hollow distributing and diverting body and hollow collecting and diverting body and the cross section of the contour of the diverting chamber insert have a square or rectangular shape coinciding substantially with one another, preferably with rounded corners.
  • Such shaping has the advantage that the arcuate walls of the medium diverting chambers can have substantially a simple basic rectangular shape, and therefore be bent from sheet metal in an extremely simple way, this type of manufacture having the advantage that it only causes low costs.
  • the heat exchange tubes running between the hollow distributing and diverting body and the hollow collecting and diverting body may also be arranged for example in two or more rows next to one another or obliquely offset in relation to one another, with the further advantage, for example in comparison with round-tube hollow (distributing and) collecting bodies, that the heat exchange tubes can have an entry or inlet termination that is straight in each case and can all be of the same length as one another.
  • terminating or attaching caps, terminating or attaching plugs or similar terminating or attaching elements that have a simple, rectangular or square cross section and, if appropriate, internal medium conductions may be provided for this, as well as those which are provided with medium supply and discharge pipe stubs or the like, as appropriate for the respective requirement on the basis of the respectively intended conduction of the heat exchange medium within the novel heat exchanger.
  • medium supply and discharge pipe stubs or the like as appropriate for the respective requirement on the basis of the respectively intended conduction of the heat exchange medium within the novel heat exchanger.
  • the hollow distributing and diverting body may be designed in such a way that it is suitable not only for the supply but also the return and discharge of the heat exchange medium from the heat exchanger.
  • modular multiple terminating or attaching elements may be used, in each case having a number of common terminating or attaching elements and able to have an extremely wide variety of arrangements of supply and discharge pipe stubs, internal medium conduction channels and the like.
  • a type of configuration of the novel heat exchanger that is particularly preferred and makes uniform and intensive heat exchange possible is disclosed in claim 10 .
  • the diverting chambers in the hollow distributing and diverting and collecting and diverting bodies of the two diverting chamber inserts are alternately arranged in such a way that a series of three, five or seven heat exchange tubes are sequentially flowed through respectively one after the other before the heat exchange medium reaches the respective discharge from the hollow collecting and diverting body and is passed from there to the outside via a corresponding pipe stub or the like.
  • An entirely analogous construction may also be provided in the hollow collecting and diverting body, which is arranged in an entirely analogous way in each case where the outflow openings of the respectively “last” tube of a series of heat exchange tubes to be sequentially flowed through by the heat exchange medium open out.
  • the outflow openings of the respectively “last” tube of a series of heat exchange tubes to be sequentially flowed through by the heat exchange medium open out.
  • Claim 12 provides more information on the arrangement of these inflow and outflow openings, respectively assigned to the inlet openings of the heat exchange tubes, in relation to the diverting chamber insert and in the just mentioned heat exchange medium inflow and outflow channel.
  • the separation of the diverting insert from the medium inflow channel is provided to provide a dividing wall or the like of its own, which on both sides bears inwardly against the side walls of the hollow distributing and diverting body and is supported in the upward direction on the upper inner wall of the latter.
  • This dividing wall favorably having the cross-sectional shape of a T—in this case an inverted T—, has respectively on the right and left of its vertical T bar, in the horizontal bar, the inflow openings for the heat exchange medium.
  • the collecting and diverting cavity is advantageously also equipped with an identical dividing wall with outlet openings.
  • a design variant of the diverting chamber insert that can be produced in a low-cost and uncomplicated manner by using a simple T profile, and is therefore particularly preferred within the scope of the invention, forms the subject matter of claim 14 .
  • claim 15 discloses advantageous modular embodiments of the attaching and connecting elements between the hollow distributing and diverting and collecting and diverting bodies, for example of heat exchange bodies connected in series and/or in parallel.
  • Claim 16 is concerned with a particularly preferred way of combining the novel heat exchange bodies with one another to form larger units, within the scope of the invention, which is made easier in particular by the use of the modular terminating and connecting elements already described in more detail further above.
  • claim 17 concerns a particularly preferred novel method, within the scope of the invention and designed in particular for aluminum as the heat exchanger construction material, for the material-integral fluid-tight connection of devices to pipes and of pipes to one another in general and for the connection of the various components of the novel heat exchanger, such as in particular the module terminating, attaching and connecting elements, such as in particular plug, cap and sleeve modules to the hollow distributing and diverting and collecting and diverting bodies, to the supply and discharge pipes and pipe stubs and the like specifically.
  • claims 18 to 20 relate to configurational variants that are particularly preferred within the scope of the novel soldering method according to claim 17 and require no further explanation because of the clear way in which they are formulated.
  • FIGS. 1 to 3 respectively show in several views and detailed representations three different embodiments of a heat exchanger according to the invention, with various types of internal conduction of the heat exchange medium,
  • FIGS. 4 to 6 show in an analogous way three variants of heat exchangers that are fundamentally similar to the heat exchangers shown in
  • FIGS. 1 to 3 are combined to form larger units
  • FIG. 6 showing a combination of two heat exchangers with different heat exchange media.
  • FIGS. 7 and 8 respectively show a compact block of in each case three heat exchangers according to the invention, connected in one case sequentially and in one case in parallel with regard to heat exchange medium conduction, and
  • FIG. 9 shows a heat exchanger as can be used in particular for air-conditioning systems of motor vehicles and refrigerating vehicles, and
  • FIG. 10 shows a special form of a soldering strip that is used with preference according to the invention, and its manufacture.
  • the heat exchanger 1 shown in FIG. 1 a to 1 f substantially comprises an upper hollow distributing and diverting body 4 of rectangular cross section and also a lower hollow collecting and diverting body 4 ′ of an identical rectangular cross section and, arranged between the same, flat heat exchange tubes 10 , 10 ′, 10 ′′, which mechanically and hydraulically connect said hollow bodies to one another respectively via inlet openings 101 and outlet openings 102 —connected material-integrally, in particular by soldering, to the same—and between which finely corrugated heat exchange fins 110 are arranged.
  • the distributing and diverting cavity 4 is terminated at the front right by an attaching element with a pipe stub 42 for the supply of the heat exchange medium wtm and at the rear left simply by a fluid-tight plug element 41 .
  • the lower collecting and diverting cavity 4 ′ is conversely terminated at the front right by a customary terminating plug 41 and on the left by an attaching plug 410 with a pipe stub 42 for the discharge of the heat exchange medium wtm.
  • Pushed into the distributing and diverting cavity 4 is an elongate diverting chamber insert 700 , which has a number of diverting chambers 7 , which have for instance arch-like or arcuate walls 70 and are respectively spaced apart from one another. These chambers are open toward the inlet and outlet openings 101 , 102 of the heat exchange tubes 10 , 10 ′, 10 ′′.
  • FIGS.1 f and 1 g show the diverting chamber inserts 700 , 700 ′ and their situation in more detail: they are respectively formed by a T profile 71 , the T horizontal bar parts 712 protruding away laterally from the T vertical bar 711 on both sides respectively being cut into transversely as far as the vertical bar 711 at intervals and then also respectively for a distance to the right and left along the vertical bar 711 , with the effect that spaced-apart webs 7120 , in which the T profile structure is unchanged, then remain intact.
  • the lugs 7121 produced in this way, extending from said web 7120 , are bent arcuately downward, in each case toward the foot end of the T bar 711 , and respectively bear inwardly against the base wall 401 of the distributing and diverting cavity 4 and the collecting and diverting cavity 4 ′ with the inlet and outlet openings 101 , 102 of the heat exchange tubes 10 , 10 ′, 10 ′′.
  • the arcuate walls 70 , 70 ′ of the diverting chambers 7 , 7 ′ for the conduction of the heat exchange medium wtm from one heat exchange tube to the next are formed.
  • the diverting chamber inserts 700 , 700 ′ are formed in a completely analogous way to one another and only the diverting chambers 7 , 7 ′ are respectively arranged offset in relation to one another.
  • the diverting chamber walls 70 , 70 ′ bear laterally against the two side inner walls 402 of the hollow bodies 4 , 4 ′ and, respectively toward the heat exchange tubes 10 , 10 ′, 10 ′′, against the base wall 401 of the hollow distributing and diverting body 4 and of the hollow collecting and diverting body 4 ′.
  • the heat exchanger 1 according to FIGS. 2 a to 2 f is constructed substantially in the same way as the heat exchanger 1 according to FIG. 1 —with the meanings of reference numerals otherwise remaining the same.
  • the construction is modified in such a way that two pipe stubs 42 , that is one each for the supply and discharge of the heat exchange medium wtm in the attaching plug module 410 are arranged at the front top right, and that the hollow distributing and diverting body 4 is divided by a flat T profile 6 with an upwardly pointing vertical bar 611 into an upper heat exchange medium discharge channel 45 and a supplying and diverting channel 44 corresponding to the contour of the hollow heat exchange medium distributing and diverting body 700 already known in principle from FIG.
  • a correspondingly “flatter” diverting chamber insert 700 being inserted in this channel 44 entirely by analogy with FIG. 1 , which insert is supplied with heat exchange medium wtm through the lower pipe stub 42 of the attaching plug 410 arranged at the top right, in the same way as already represented in FIG. 1 .
  • the profile shape, corresponding to a “flat” inverted T, of the dividing profile 6 defining the medium discharge channel 45 has the advantage that the same can be supported—resting on the diverting chamber insert 700 —by means of the short vertical bar 611 on the upper inner wall 403 of the distributing and diverting cavity 4 and with its horizontal bar 612 on both sides on the side walls 402 .
  • the hollow collecting and diverting body 4 ′ its inner cross section is dimensioned in precisely the same way as the inner cross section of the supply channel 44 in the hollow distributing and diverting body 4 . This ensures that the two diverting chamber inserts 4 , 4 ′ are likewise dimensioned identically to one another and consequently a minimization of the production expenditure is also achieved here.
  • a heat insulating sheet 67 is arranged between the diverting chamber insert 4 and the dividing profile 6 .
  • a heat exchange medium supply channel 44 Formed in an analogous way in the upper distributing and diverting cavity 4 , in the cavity remaining free above the diverting chamber insert 700 there, kept free by the T dividing profile 6 and having the part cross section qa, is a heat exchange medium supply channel 44 , from which heat exchange medium wtm is respectively introduced via a first of the inlet openings 441 punched into the dividing profile to the inlet opening 101 of a “first” inlet tube 10 of a first series 100 of three neighboring heat exchange tubes 10 , 10 ′, 10 ′′, and then the other heat exchange tubes, in each case three of them, of a next tube series 100 are supplied in the same way, respectively through the next inlet opening 441 of the dividing profile 6 and via a supply opening 10 offset by three heat exchange tubes, and so on.
  • the T shape of the dividing profile 6 is favorable, because it makes support of the same possible on the respectively upper and lower outer inner wall 403 of the hollow distributing and diverting body 4 and the hollow collecting and diverting body 4 ′, and consequently securement of the medium inflow channel 44 and outflow channel 45 in the two cavities 4 , 4 ′.
  • the internal conduction of the heat exchange medium wtm through the heat exchange tubes 10 , 10 ′, 10 ′′ is designed there in such a way that the heat exchange medium is introduced via the inlet pipe stub 42 arranged on the bottom left attaching plug 410 and is discharged via the outlet pipe stub 42 of the bottom right attaching plug 410 .
  • two heat exchangers 1 of the type already shown in FIG. 2 are arranged—with the meanings of reference numerals otherwise remaining the same—with heat exchange medium supply channels 44 and discharge channels 45 arranged in the distributing cavities 4 and they are each in themselves flowed through by the heat exchange medium wtm supplied at the top right and left via the respectively lower pipe stubs 42 in the two attaching plug modules 410 .
  • the combination of the two heat exchangers 1 here simply of a mechanical nature, takes place by means of “blind” connecting plug modules 416 that are inserted on both sides into the two upper hollow distributing and diverting bodies 4 , in particular soldered in.
  • the heat exchange medium wtm is respectively discharged via the upper outlet pipe stub 42 of the left and right upper terminating plug modules 41 of the distributing and diverting cavities 4 of the two heat exchangers 1 .
  • the heat exchanger unit 1 / 1 of FIGS. 6 a to 6 g formed by the two heat exchangers 1 , 1 ′ that are likewise only mechanically connected to one another by means of fluid-tight connecting plug modules 416 , are arranged in series and form separate units, are in turn each in themselves identical to the simple embodiment of the heat exchanger 1 according to FIG. 1 , in this case the “longer” heat exchanger 1 , on the right, being one which is operated with water as the heat exchange medium wtm and the “shorter” heat exchanger 1 ′, on the left, being one which is operated with oil as the heat exchange medium wtm′.
  • the simply mechanical connection between the two heat exchangers 1 , 1 ′ of different types is produced by the fluid-tight connecting plug module 416 , soldered into the distributing and diverting cavities 4 , and the likewise fluid-tight connecting plug module 417 , soldered into the collecting and diverting cavities 4 ′, which module carries the two supply pipe stubs 42 for the two different heat exchange media wtm and wtm′.
  • FIG. 7 an example of a parallel or block arrangement of a total of three heat exchangers 1 of the type according to FIG. 1 , connected in series with respect to the heat exchange medium flow, is shown —with the meanings of reference numerals otherwise remaining the same—, the right-hand openings of the three distributing and diverting cavities 4 and the right-hand openings of the three collecting and diverting cavities 4 ′ in this case being attached by means of a triple connecting plug module 418 , having a supply stub 42 for the heat exchange medium wtm into the rear heat exchanger 1 and a connecting channel 436 between the middle heat exchanger and the front heat exchanger.
  • the left-hand openings of the three lower collecting and diverting cavities 4 ′ are closed in an entirely analogous way by means of an identical triple connecting plug module 418 soldered in there, with heat exchange medium conduction 436 from the rear heat exchanger in FIG. 7 into the middle of the three heat exchangers 1 , and the discharge of the medium wtm taking place via the pipe stub 42 there.
  • the closure of the two other openings of the distributing cavity 4 and the collecting cavity 4 ′ takes place by means of “blind” triple closure plug modules 420 .
  • FIG. 8 A block arrangement of three heat exchangers 1 , connected in parallel with one another with respect to the flow of the heat exchange medium wtm, is shown in FIG. 8 —with the meanings of reference numerals otherwise remaining the same: it can clearly be seen there how at the top right the openings of the three distributing and diverting cavities 4 and at the bottom left the openings of the three collecting and diverting cavities 4 ′ are respectively terminated in their interior by triple terminating plugs 419 , with in each case heat exchange medium supply lines 437 leading to all three heat exchangers and heat exchange medium discharge lines 437 leading away from all three heat exchangers 1 .
  • FIG. 9 shows a special form 1 ′ of a heat exchanger 1 according to the invention—with the meanings of reference numerals otherwise remaining the same—, in which the formation with hollow distributing bodies 4 and hollow collecting bodies 4 ′ and with heat exchange tubes 10 , 10 ′, 10 ′′ connecting the same is analogous to the heat exchangers of the previous figures.
  • FIG. 10 schematically shows the manufacture of a soldering metal strip for the connection of tubes made of aluminum by soldering respectively via an inner cone and outer cone at their ends.
  • the soldering metal strip BL shown there in its stages of manufacture, is introduced into the gap between these two cones with a filling comprising abrasive material particles AP to support the creation of a fluid-tight soldering somewhat in the manner of frictional welding.
  • the starting material is a strip foil of soldering metal with a cross-sectional shape approximately akin to the capital letter “W” with two longer outer flanks AF and a shorter middle part MT, arranged between the same and bent twice here in a zigzag form.
  • the strip takes on a cross-sectional shape rather similar to a Y, the foot FY of the Y here having six times the thickness of the original strip material and—extending from this—two Y arms YA protruding obliquely upward and downward.
  • soldering metal strip BL obtained in this way has, for example, a thicker lower foot zone UZ and a thinner upper arm zone OZ and also a “bulging” middle zone MZ, filled with the abrasive particles.
  • This soldering metal strip BL is introduced for example into the gap, widening slightly from inward to outward, between the inner cone and outer cone of two tube ends to be soldered to one another, heating takes place, for example somewhat above the soldering metal melting temperature, under simultaneous exposure to ultrasound, thereby creating many “fresh” zones, that are therefore capable of being wetted, of the aluminum surfaces of the cones, and a stable, fluid-tight soldered connection of the two tubes to one another is thereby ensured, formed virtually only with aluminum on the inside, since the “thin” arm zone OZ is inserted there, precluding any risk of local Al—Zn element formation there.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US10/556,840 2003-05-16 2004-05-14 Heat exchanger Abandoned US20070012432A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
ATA755/2003 2003-05-16
ATA754/2003 2003-05-16
AT7542003 2003-05-16
AT7552003 2003-05-16
PCT/AT2004/000172 WO2004102099A1 (fr) 2003-05-16 2004-05-14 Echangeur de chaleur

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US (1) US20070012432A1 (fr)
EP (1) EP1625339B1 (fr)
AT (1) ATE403841T1 (fr)
DE (1) DE502004007785D1 (fr)
WO (1) WO2004102099A1 (fr)

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US20080236785A1 (en) * 2006-10-03 2008-10-02 Halton Oy Device For Treatment Of Indoor Air
US20100122544A1 (en) * 2008-11-17 2010-05-20 Industrial Technology Research Institute Micro-channel heat exchanger for carbon dioxide refrigerant, fluid distributer thereof and method of fabricating heat exchanger
US20110277979A1 (en) * 2009-01-27 2011-11-17 Komatsu Ltd. Heat Exchanger
US20120222844A1 (en) * 2011-03-04 2012-09-06 General Electric Company Rotating machine apparatus
WO2020048223A1 (fr) * 2018-09-03 2020-03-12 北京空间机电研究所 Caloduc à fentes ayant des fentes périphériques et son procédé d'assemblage
CN112846681A (zh) * 2020-12-31 2021-05-28 沈平 一种轻质空压机散热器的制备工艺
US20220034591A1 (en) * 2020-07-31 2022-02-03 Coretronic Corporation Liquid cooling device and projection device

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CN105333649B (zh) * 2014-08-08 2019-10-15 杭州三花研究院有限公司 一种换热器以及该换热器的制造方法
CN112374722B (zh) * 2020-10-30 2021-11-02 上海市政工程设计研究总院（集团）有限公司 一种污泥流化床干化机

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EP1625339A1 (fr) 2006-02-15
DE502004007785D1 (de) 2008-09-18

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