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
  • 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
  • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
  • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
  • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
  • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
  • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
  • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
  • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • 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
  • F28D2021/0085—Evaporators

Definitions

• Heat exchangers especially evaporators
• the invention relates to a heat exchanger, in particular an evaporator, consisting of a heat exchanger network of corrugated fins and flat tubes, according to the preamble of claim 1 - known from DE-A 198 26 881 by the applicant.
• the soldered flat tube / evaporator which has become known from DE-A 198 26 881, is designed in two rows; i.e., seen in the air flow direction, there are two rows of flat tubes, between which corrugated fins are arranged, one behind the other, the ends of the flat tubes opening into collecting boxes, each of which is divided by a longitudinal partition wall into a front and a rear chamber. Cross-dividing walls are partially provided within these chambers.
• the flow of the refrigerant runs in the flat tube rows both from top to bottom and from bottom to top, with a deflection of the refrigerant on the one hand “in the width”, i.e. transverse to the air flow direction and on the other hand “in the depth”, ie. H.
• the object of the present invention is therefore to improve a heat exchanger of the type mentioned at the outset in such a way that its manufacture is simplified and thus the production costs are reduced and its performance is improved.
• the heat exchanger according to the invention is designed in a single row, d. H.
• the flat tubes are designed to be continuous over the depth (in the direction of air flow) and are provided with a separating web that runs in the longitudinal direction and is soldered to the longitudinal dividing wall.
• the single-row heat exchanger according to the invention and the double-row heat exchanger according to the prior art are thus functionally the same - with regard to the refrigerant flow.
• the construction according to the invention has the advantage that the continuous flat tubes and also the continuous corrugated fins are much easier to cassette and that there is also a stop when inserting the flat tubes into the floors, which defines the insertion depth of the flat tube ends.
• the heat transfer capacity is also increased because heat is transferred over the entire depth of the heat exchanger.
• the end of the flat tube in the region of the separating web has a cutout with which it is supported against the underside of the base.
• the longitudinal partition engages in this recess from above and thus ensures tight soldering.
• the cutout divides the flat tube end into two flat tube ends, which are received by passages in the floor, these passages being interrupted in the region of the longitudinal dividing wall.
• the flat tube end is straight, i. H. without a recess and is taken up by a continuous draft in the bottoms of the collection boxes. This results in a good soldering of the flat tubes in the floors.
• the longitudinal partition wall on the other hand, has recesses in the area of the passages and the flat tubes arranged in the passages, which are adapted to the contour of the passage and flat tube and thus ensure good soldering.
• the flat tube has a constant thickness.
• the flat tube has a smaller thickness in the region of the separating web, specifically in the form of a narrow central web connecting the two flat tube halves.
• the flat tube end is also straight, ie without a recess and inserted through an opening in the bottom that corresponds to the contour of the flat tube end.
• the longitudinal partition wall has narrow slits or cutouts in the area of the narrow central webs protruding into the collecting box, which overlap the central webs - this makes one in this area tight soldering between the longitudinal partition and separator is guaranteed.
• the openings in the floor are partially designed as passages, ie passages interrupted in the region of the longitudinal partition.
• FIG. 1a shows a section of the flat tube evaporator according to FIG. 1, FIG. 2, 2a,
• Fig. 1 shows an example of a heat exchanger according to the invention a single-row flat tube / evaporator 1 with a heat exchanger network 2 and an upper header 3 and a lower header 4.
• this evaporator 1 corresponds to the generic state of the art, i. H. DE-A 198 26 881.
• the guidance of the refrigerant, d. H. the flow pattern essentially corresponds to this prior art.
• Fig. 1a shows a section in the area of the collecting tube 3 from the evaporator 1.
• the collecting box 3 is divided by a longitudinal partition 5 into two chambers 6a and 6b, in which ends 7, 8 of flat tubes 9 open, which are continuous, ie the form a single row of tubes of this evaporator 1.
• Continuous corrugated fins 10 are arranged between the flat tubes 9 and ambient air flows over them.
• the collection box 4, not shown here, is constructed analogously.
• FIGS. 2a to 2d show a first embodiment of the invention.
• Fig. 2 shows a section similar to Fig. 1 a, ie an upper header box 11, which is divided into two longitudinally extending chambers 12, 13.
• a continuous flat tube 14 is designed as an extruded tube and has a plurality of channels 14 '.
• a dividing web 15 is arranged in the middle and in the longitudinal direction of the flat tube 14, which divides the flat tube 14 into two flow paths 14a and 14b.
• the separating web 15 ends in the upper region of the flat tube 14 opening into the chambers 12, 13 in a recess 16 into which a longitudinal partition 17 of the collecting box 11 engages.
• the flat tube 14 thus has two flat tube ends 18, 19 on both sides of the recess 16, which communicate with the flow paths 14b and 14a.
• FIG. 2a shows a detail from FIG. 2 in the region of the longitudinal partition wall 17, which is formed from two sheet metal sections 17a, 17b of the collecting tank 11 lying against one another.
• the lower end 17c of the partition 17 lies on a floor 20 which is part of the collecting box 11.
• Passages 21 are formed from the base 20, which receive the pipe ends 18, 19 and are interrupted in the region of the longitudinal partition 17.
• FIG. 2b shows a section B-B (cf. FIG. 2c) in the plane of the longitudinal partition 17 and the separating webs 15. It can be seen that the upper edge 15a of the dividing web 15 abuts the underside 20a of the base 20; the bottom 20 is thus clamped between the upper edge 15a of the dividers 15 and the lower edge 17c of the longitudinal dividing wall 17. All contact points solder to one another and thus ensure a secure seal between the two chambers 12, 13 and the flow paths 14a, 14b.
• 2c shows a further illustration, namely a section along the plane AA (cf. FIG. 2b), ie approximately parallel to the floor 20 through the partition wall 17. It can be seen that the divided flat tube ends 18, 19 are received in passages 21 , which are interrupted due to the longitudinal partition 17.
• 2d shows a part of the longitudinal partition 17 with a tab 22 which - as can also be seen in FIG. 2b - is inserted into a corresponding slot in the floor for caulking and is tightly soldered to it. Otherwise, the lower edge 17c of the partition 17 is continuously straight, that is to say adapted to the contour of the base 20.
• FIGS. 3a to 3d show a second exemplary embodiment of the invention.
• a flat tube 23 is divided in the middle by a separating web 24, the end 24a of the dividing web 24 being at one level with the upper edge 23a of the flat tube - in contrast to the flat tube 14 from FIG. 2, the flat tube 23 has no recess on.
• a longitudinal partition 25 extends in the extension of the web 24.
• FIG. 3a shows a detail from FIG. 3 in the area of the longitudinal partition wall 25, which on the one hand rests with its lower edge 25c on a floor 26 and on the other hand has cutouts 27 in the area of the continuous flat tubes 23.
• Continuous passages 28 are formed from the bottom 26, which can be seen particularly clearly from the top view in FIG. 3c.
• the cutouts 27 in the partition can be clearly seen in FIG. 3d - their shape is adapted to the contour of the continuous passages 28 and the flat tubes 23, which protrude somewhat beyond the upper edge of the passages 27. Due to the continuous passages 28 there is a good soldering of the ends of the flat tubes 23 to the bottom 26.
• the partition 25 also soldered with its entire lower contour, as can be seen in FIG. 3d, to the bottom 26, the passages 28 and Upper edge 24a of the separating web 24.
• Fig. 3b shows a section B-B in the plane of the partition 25 (corresponding to the plane B-B in Fig. 3c). This results in a tight partitioning of the two chambers on both sides of the partition wall 25.
• FIG. 3d shows between the two recesses 27 a tab 29 which, as can also be seen in FIG. 3b, engages in the base 26 and is soldered there.
• Fig. 4 shows a third embodiment of the invention with a continuous flat tube 30, which in turn is divided in the middle by a separating web 31 into two flow paths.
• the flat tube 30 ends on the end in the two chambers 32, 33 of the header 34 with the longitudinal partition 35, which - as shown in FIG. 4a - rests on a bottom 36 of the header 34.
• FIG. 4c shows that this separating web 31 (narrow middle web) has a relatively small thickness compared to the thickness of the flat tube 30.
• the ends of the flat tubes 30 are received in non-continuous passages 37 which are interrupted in the region of the partition 35.
• the dividing wall 35 has - as can be clearly seen in FIG. 4d - slots 38 extending from its lower edge 35a, which correspond to the contour of the narrow central webs 31 and encompass them (cf. FIG. 4b).
• the ends of the narrow central webs 31 thus protrude slightly beyond the bottom 36 and therefore engage in the slots 38 of the partition 35.
• the partition 35 also has (see FIG. 4d) tabs 39 projecting from its lower edge 35a, which engage in the bottom 36 (see FIG. 4b).
• connections, not shown, between the lower header box 4 and the lower end of the flat tubes 14, 23, 30 are preferably analogous to the exemplary embodiments described above.
• the invention has been described on the basis of exemplary embodiments in which the collecting boxes are each made from a one-piece sheet metal which is shaped in such a way that two of its longitudinal sides form the longitudinal partition wall of the collecting box.
• This configuration is described in DE-A 198 26 881, which hereby expressly belongs to the disclosure content. If the collecting box is placed in its entirety on the flat pipe ends during the production of the heat exchanger, the advantages of the invention come to bear in particular, in particular the stop for the pipe ends in the collecting box, since the pipes can thereby be fixed in their position.
• the invention also encompasses other embodiments, such as, for example, heat exchangers with two-part collecting boxes, that is to say consisting of a tube sheet and a lid.

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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)
• Details Of Heat-Exchange And Heat-Transfer (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Separation By Low-Temperature Treatments (AREA)
• Photovoltaic Devices (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=31969240

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (18)

• 2002
  • 2002-09-18 DE DE10243416A patent/DE10243416A1/de not_active Withdrawn
• 2003
  • 2003-09-08 WO PCT/EP2003/009930 patent/WO2004029533A1/fr active Application Filing
  • 2003-09-08 AU AU2003267057A patent/AU2003267057A1/en not_active Abandoned
  • 2003-09-08 CN CNB038221462A patent/CN100390487C/zh not_active Expired - Fee Related
  • 2003-09-08 EP EP03747979A patent/EP1552238B1/fr not_active Expired - Lifetime
  • 2003-09-08 JP JP2004538869A patent/JP4348297B2/ja not_active Expired - Fee Related
  • 2003-09-08 AT AT03747979T patent/ATE473409T1/de not_active IP Right Cessation
  • 2003-09-08 DE DE50312864T patent/DE50312864D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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