EP1042641A1 - Heat exchanger tubular block and a multi-chamber flat tube which can be used therefor - Google Patents

Heat exchanger tubular block and a multi-chamber flat tube which can be used therefor

Info

Publication number
EP1042641A1
EP1042641A1 EP99945950A EP99945950A EP1042641A1 EP 1042641 A1 EP1042641 A1 EP 1042641A1 EP 99945950 A EP99945950 A EP 99945950A EP 99945950 A EP99945950 A EP 99945950A EP 1042641 A1 EP1042641 A1 EP 1042641A1
Authority
EP
European Patent Office
Prior art keywords
block
heat exchanger
units
collecting
exchanger tube
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.)
Granted
Application number
EP99945950A
Other languages
German (de)
French (fr)
Other versions
EP1042641B1 (en
Inventor
Bernd Dienhart
Hans-Joachim Krauss
Hagen Mittelstrass
Karl-Heinz Staffa
Christoph Walter
Jochen Schumm
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.)
Ford Werke GmbH
Original Assignee
Ford Werke GmbH
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 Ford Werke GmbH filed Critical Ford Werke GmbH
Publication of EP1042641A1 publication Critical patent/EP1042641A1/en
Application granted granted Critical
Publication of EP1042641B1 publication Critical patent/EP1042641B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—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
    • 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
    • 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
    • F28F9/0209—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions
    • F28F9/0212—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions the partitions being separate elements attached to header boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/04—Communication passages between channels

Definitions

  • the invention relates to a heat exchanger tube block according to the preamble of claim 1 and to a multi-chamber flat tube that can be used for such a tube block.
  • the reverse block contains a plurality of block units each consisting of a plurality of stacked pipe units one above the other, the stacking direction defining a block vertical direction and the flow channels formed by the pipe units running in a block transverse direction perpendicular thereto.
  • the block units are arranged one behind the other in the block depth direction perpendicular to the block vertical and block transverse directions.
  • the pipe units open into collecting channels, which run laterally on the pipe block in the block vertical direction, i. H . with a parallel longitudinal axis are arranged.
  • the term "collecting channels" is used uniformly for the sake of simplicity for all channels into which the pipe units open, these being collecting channels in the actual sense in which the medium which is carried out in parallel through several pipe units is collected for the purpose of being discharged from the pipe block Distribution channels in which the medium supplied to the pipe block is distributed over several confluent pipe units as well as deflection channels in which the medium is deflected from a first group of pipe units opening into a second group of pipe units opening.
  • the tube block In use, the tube block is flowed through by a first medium, while a second medium to be brought into thermal contact with the first is passed over the tube block in the depth direction of the block with outside flow onto the tube block surfaces.
  • Heat exchangers with such tube blocks are e.g. used as evaporators and condensers in automotive air conditioning systems.
  • the pipe block is usually supplemented into a pipe / fin block by inserting heat-conducting corrugated fins between the pipe units.
  • the tube units can be formed, for example, by flat tubes.
  • a generic heat exchanger tube block is disclosed in the published patent application DE 39 36 101 AI.
  • the tube block local is composed of single-chamber flat tubes, the U-shape are bent over by 180 ° in the plane of its transversal and longitudinal extension and stacked in the direction perpendicular thereto with the interposition 'corrugated fin once or meander several times.
  • the tube block thus consists of two or more block units located one behind the other in the block depth direction, each of which contains a stack of rectilinear, parallel-flowed flat tube sections.
  • Adjacent block units are in serial fluid communication via the side U-3 arches of the flat tubes.
  • the two ends of each flat tube open on the same side of the block into an associated collecting duct running along the 3lock vertical direction, the two collecting ducts being formed by a longitudinally divided collecting box or two separate collecting pipes.
  • the invention is a technical problem of providing a heat exchanger tube block of the type mentioned at the outset, with which a heat exchanger with high heat transfer capacity and high pressure stability with a relatively low filling capacity quantity and with the possibility of variable guidance of the temperature control medium passed through, as well as a multi-chamber flat tube which is particularly suitable for the construction of such a tube block.
  • the invention solves this problem by providing a heat exchanger tube block with the features of claim 1 and a multi-chamber flat tube with the features of claim 11.
  • At least one collecting duct connection is provided between at least two adjacent block units, which connect a collecting duct of the one block unit directly to a collecting duct of the other block unit.
  • the term "direct” means that the relevant collecting channels are connected via a corresponding fluid connection running in the block depth direction and not or at least not only via one or more of the pipe units of the block.
  • a high heat transfer capacity for the pipe block can be achieved by the several block units lying one behind the other in the 31ock depth direction and thus the flow direction of the other medium passed over the pipe block.
  • the tube block can be constructed from extruded flat tubes with channels optimized with regard to a small filling quantity, ie a small volume of the tube block to be flowed through, and high pressure stability.
  • the collecting ducts arranged on the side of the pipe block can be formed by highly pressure-stable collecting pipes with a relatively small cross-section, in particular if correspondingly narrow flat pipe units or those with the longitudinal direction of the collecting duct flat tube ends turned out from the transverse plane can be used.
  • direct collecting channel connections between each pair of adjacent block units are provided such that the block units are flowed through in series by the associated temperature control medium.
  • a collecting space which e.g. is formed by a collecting pipe or a collecting box, divided into several collecting channels by transverse partition walls. This allows a serpentine flow, once or several times deflected, to flow through a respective block unit.
  • each unit block of the associated header tubes are formed, which are spaced apart in the block depth direction, such as "serablauf facilitates Condensation when used in an evaporator.
  • the spacing is brought about by one or more spacer elements which are molded onto or attached to the header tubes.
  • the spacer element according to claim 5 includes a formed sheet metal piece or tube piece with at least one slot opening or according to claim 5, an outwardly bulged passage on a collecting tube.
  • the spacer elements designed in this way keep the manifolds at a distance and at the same time define a respective manifold connection.
  • the spacer element can consist of two passages which abut or engage in one another in a fluid-tight manner, for which purpose at least one of the two passages is bulged outwards.
  • the tube units are formed by straight flat sections which open into the header tubes with twisted tube ends. Due to the twisting at the end, the flat tube ends are twisted out of the transverse plane of the header tubes, which makes it possible to use header tubes with an inner diameter that is smaller than that of the flat tube, in order to keep the inner volume of the tube block low.
  • a tube block developed according to claim 9 is supplemented to a tube / rib block.
  • a single corrugated fin can be introduced, the width of which essentially corresponds to the entire block groove, or several corrugated fins are provided next to one another, which can be of the same or different width and structure.
  • a tube block developed according to claim 10 at least two tube units lying next to one another in the block depth direction are realized as integral parts of a one-piece multi-chamber flat tube, for which purpose the width extends over a corresponding number of block units.
  • the multi-chamber flat tube according to claim 11 is particularly suitable for the construction of a tube block according to claim 10. It is divided at the end by one or more longitudinal slots into a plurality of separate end segments, each of which is twisted about its own longitudinal axis.
  • the end segments of each flat tube end region are then individually assigned to the corresponding block units, so that the chambers of each flat tube are divided into groups on the corresponding block units, the chambers emanating from an end segment each belonging to a block unit.
  • FIG. 1 is a schematic side view of one of several block units of a tube / fin block for an evaporator of an air conditioning system
  • FIG. 2 shows a schematic side view of a lateral collecting tube arrangement of the tube / fin block from FIG. 1, FIG.
  • FIG. 3 shows a schematic cross-sectional view of a first realization of direct fluid connections between collecting channels of the collecting pipes from FIG. 2,
  • FIG. 5 shows a schematic cross-sectional view of a third realization of the collecting duct connections
  • FIG. 6 shows a schematic cross-sectional view of a fourth realization of the collecting duct connections
  • FIG. 7 is a schematic, partial top view of a multi-chamber flat tube that can be used for the tube / fin block of FIG. 1.
  • the respective block unit 1 shows a pipe block unit 1, several of which are arranged one behind the other in the block depth direction, that is to say perpendicular to the drawing plane, and thereby form a pipe / fin block which can be used, for example, as a parallel-flow evaporator with variable refrigerant guidance in a motor vehicle air conditioning system.
  • the respective block unit 1 contains a stack of successive, ie stacked, multi-chamber flat tube units 2 in the block vertical direction, the chambers of which, ie flow channels, in Block cross direction, ie perpendicular to the block depth and block vertical direction.
  • the flat tube units 2 which otherwise lie in planes perpendicular to the block vertical direction, are twisted by a predeterminable torsion angle about their longitudinal center axis, alternatively about an axis parallel to them.
  • the torsion angle can be chosen as desired between 0 ° and 90 °, with a torsion of 90 ° being selected as an example in FIG. 1.
  • Heat-conducting corrugated fins 6 are introduced between the flat tube units 2.
  • the flat tube units 2 open into respective header tubes 4a, 5a, which are provided on opposite tube block sides and are arranged with a longitudinal axis parallel to the vertical direction of the block.
  • the flat tube ends 3a, 3b are inserted in a fluid-tight manner in corresponding slots in the header tubes 4a, 5a.
  • these longitudinal slots run parallel to the longitudinal axis of the collecting pipe, which enables the use of collecting pipes 4a, 5a with a particularly small inside diameter. In extreme cases, the latter then only needs to be slightly larger than the thickness of the flat tube units 2.
  • the longitudinal slots made on the respective collecting pipe 4a, 5a are separated from one another by narrow webs or are combined to form a continuous longitudinal slot.
  • FIG. 2 shows an arrangement of four collecting channels 4a, 4b, 4c, 4d lying next to one another parallel in the block depth direction, as are provided on the right side of the tube block in FIG. 1 for the assumed case that the tube block is composed of four block units 1 lying one behind the other.
  • four header tubes are then also arranged correspondingly.
  • the side shown in FIG. 2 forms the connection side of the pipe block, whereby for the flow direction selected in FIGS. 1 and 2, illustrated by flow arrows, the medium passed through the pipe block is fed to the collecting pipe 4 a on the left in FIG. 2 and from the one shown in FIG. 2 right collective pipe 4d is discharged again. It is understood that alternatively the opposite flow direction is possible.
  • the header pipes 4a to 4d shown in FIG. 2 are each divided into two separate header channels 8a, 8b by a transverse partition 7a to 7d; ' 9a, 9b; 10a, 10b; 11a, 11b divided.
  • the opposite collecting tubes are undivided and therefore each form a single collecting channel 12, as illustrated in FIG. 1 on the left collecting tube 5aa.
  • the undivided manifolds on the left side of the block in FIG. 1 act as deflecting tubes, which deflect that from one part of the flat tube units, which open in parallel on the opposite side into the one collecting duct 8a, into the other part of the flat tube units, which open opposite to the other collecting channel 8b.
  • This flow behavior can also be seen in FIG. 1.
  • a collecting duct connection 13a, 13b, 13c is provided between each two adjacent ones of the four collecting pipes 4a to 4d of FIG. 2, in which a direct fluid connection is created in the block depth direction between the associated flow ducts.
  • the collecting duct connections 13a to 13c are arranged alternately in such a way that of the two collecting ducts of each inner collecting pipe 4b, 4c, one with the neighboring collecting duct of a collecting pipe adjacent on one side and the other with the adjacent collecting duct of a collecting pipe adjoining on the other side is connected. In this way, the temperature control medium is guided serially through the block units located one behind the other, whereby it flows through each block unit in a meandering manner.
  • the temperature control medium reaches the associated collecting duct 8a of one end via a lateral inlet opening 14 Manifold 4a.
  • This collecting duct 8a functions as a distributor, which divides the medium into the first part of parallel flat tube units 2 of the block unit 1 in question which flows into it.
  • the medium After flowing through this group of flat tube units 2, the medium reaches the opposite Sarnmel or deflection tube 5a, where it is deflected in the remaining part of the flat tube units 2 of this block unit 1, in order to pass through these flat tube units into the other collecting duct 8b of the inlet-side collecting tube 4a stream.
  • the medium is forwarded via the corresponding collecting duct connection 13a into the adjacent collecting duct 9a of the adjacent collecting pipe 4b and thus to the next block unit.
  • This block unit flows through it, as can be seen from FIGS. 1 and 2, in the. Flow through the first, inlet-side block unit in opposite directions.
  • the flow directions are further illustrated in FIG. 2 by the fact that in those collecting channels in which the temperature control medium is passed on to the drawing plane, the crossed circles customary for this are drawn in, while in the other collecting channels which act as collectors and into which the medium enters the drawing plane from behind, the usual dotted circles are drawn.
  • the medium After flowing through the second block unit, the medium thus arrives in the collecting collecting duct 9b of this block unit and is forwarded from there to the distributing, neighboring collecting duct 10a via the corresponding collecting duct connection 13b to the next block unit.
  • This third block unit is then again flowed through in the same direction as the first block unit.
  • the medium From its collecting channel 10b, the medium passes through the associated channel connection 13c to the fourth block unit, which in turn flows through in the same way as the second block unit.
  • the temperature control medium is then discharged from the tube block via an end outlet 15 from the collecting collecting channel 11b of the fourth block unit.
  • the shape and positioning of the inlet and outlet openings can be modified as desired in relation to the example shown in order to supply the temperature control medium to the pipe block in a manner which is best adapted to the respective application and to discharge it again from there.
  • additional transverse partition walls can be provided in the header pipes on both sides of the respective block unit in order to guide the temperature-control fluid through the block unit in a meandering manner with repeated reversal of direction.
  • Another modification is to provide the inlet and outlet openings not on the same as shown, but on opposite pipe block sides.
  • the header pipes 4a to 4d are arranged on the respective pipe block side at a distance from one another, which e.g. when used as an evaporator, the condensate drainage easier.
  • FIGS. 3 to 6 Various implementations for this are shown in FIGS. 3 to 6. In the example of FIG.
  • a suitably shaped tubular sleeve 17 is provided as a spacer element, which is provided at two radially opposite points on its circumference with longitudinal slots 18a, 18b, the slot edges of which form connecting pieces which are inserted in a fluid-tight manner in corresponding longitudinal slots of two header pipes 19a, 19b to be connected are.
  • the tubular sleeve 17, which thus forms a tubular transition piece, is closed and fixed at the end: the two fluid-connected header tubes 19a, 19b at the desired distance.
  • a suitably shaped, solder-plated sheet metal piece 20 is used as a spacer element, into which an opening 21 is made, which adjoins with longitudinal slots 22, 23.
  • the collecting pipes 24, 25 forms a continuous fluid connection between the collecting channels defined by the collecting pipes 24, 25.
  • two flat tubes 2a, 2b of adjacent tube block units are shown in FIG. 4, which are inserted with correspondingly twisted tube ends into corresponding longitudinal slots of the header tubes 24, 25 in a fluid-tight manner.
  • the temperature control medium flows from a flat tube 2a and possibly further parallel flat tubes of the same block unit into the collecting channel of the associated collecting tube 24 and is forwarded via the direct collecting channel connection into the collecting channel of the adjacent collecting tube 25 and then into there distributed flat tubes 26 of the next tube block unit concerned.
  • solder-plated sheet metal piece 20 to the manifolds 24, 25 is carried by 'a suitable soldering, the previous solder plating can be performed by any conventional method, for example by galvanizing, or the so-called CD method.
  • a common soldering process can be provided both for connecting the spacer elements 20 to the header tubes 24, 25 and for the fluid-tight connection of the flat tube units to the header tubes 24, 25, for which purpose the flat tubes and / or the header tubes are also prefabricated with solder and provided with flux.
  • unplated manifolds 24, 25 can be used and separate molded solder parts can be introduced at the connection points.
  • the fluid-connected manifolds 24, 25 are also kept at a desired distance from one another with the spacer elements 20 used in the example of FIG. 4.
  • FIG. 5 and 6 show examples in which the spacer elements themselves are formed by corresponding bulges on the connected manifolds.
  • collecting tubes 26, 27 are used, which are provided with dome-shaped bulges 28, 29 at the connection points are, which surround a respective through opening 30, 31.
  • the header pipes 26, 27 to be connected are joined together with their dome-shaped bulges 28, 29 in a fluid-tight manner so that the desired fluid connection is obtained there and the header pipes 26, 27 are kept at a distance in the area outside the connection point as desired.
  • header pipes 32, 33 to be connected to one another are provided with different, intermeshing dome-shaped bulges 34, 35, which surround associated through openings.
  • the narrower bulge 35 is inserted into the corresponding bulge 34 of greater width and fixed in it in a fluid-tight manner, preferably by means of sealing soldering.
  • the slots required for inserting the tube units can be made in one operation with the slots required for the direct manifold fluid connection, i.e. Passages, and possibly the associated dome-shaped bulges are generated.
  • the passages for the direct collecting channel fluid connections can be round or elongated.
  • the two dome-shaped bulges forming a respective collecting channel-fluid connection do not need, as in the examples shown, both to be bulged outwards, but alternatively one of the two can be bulged inwards, in which the other bulge facing outwards engages.
  • the flat tube units 2 of the tube / fin block from FIG. 1 can consist of flat tubes 2a, 2b lying next to one another in the block depth direction, for each block unit 1, ie in this case each block unit 1 consists of a stack of individual flat tubes, whose width corresponds essentially to the depth of the respective block unit.
  • a wider type of flat tube can be ner manner can be used, as is schematically and partially illustrated in Fig. 7.
  • the multi-chamber flat tube 2c shown there has a width T which essentially corresponds to the total tube block depth, ie the sum of the depths of the individual block units.
  • the flat tube 2c is in both end regions, of which in., Fig.
  • the flat tube 2c is flow-technically into a corresponding number n of flat tube strands 2 according to 2 2 , 2 3 , 2 4 which each belong to one of the block units one behind the other in the block depth direction and contain an associated subgroup of all flow channel-forming chambers of the flat tube 2c, while in the example of Fig.
  • the flat tube 2c is divided into partial strands 2 X to 2 4 of the same width , may alternatively be a division be provided in different widths partial strands.
  • in the example of Fig. 7 remains between two adjacent flat tube parts per an open flow channel 39 by being the end of the corresponding wide chosen saw cuts 36!, 36 2, 36 3 reduced and thereby does not act as a fluid-carrying channel that opens into the collecting pipes If saw cuts are made as narrow cuts between adjacent channels, all chambers of the flat tube 2c can function as fluid-conducting flow channels if required.
  • the multi-chamber flat tube 2c is preferably manufactured as an extruded profile with channels optimized with regard to a small internal volume and high pressure stability.
  • one corrugated fin extending over the entire block depth or several narrower corrugated fins of the same or different can be used for each fin layer. Width must be placed side by side.
  • a wide corrugated fin extending over three block units and a narrow corrugated fin limited to the fourth block unit or alternately a narrower and a wider corrugated fin can be provided.
  • the various possibilities for introducing the corrugated fins 6 are independent of whether the wide flat tube 2c of FIG. 7 or a plurality of flat tubes lying side by side in the block depth direction are provided.
  • the pipe block according to the invention is u. a. Particularly good for evaporators of automotive air conditioning systems working with the refrigerant C0 2 , in that it is sufficiently pressure-stable and has a comparatively small internal volume, whereby besides the already mentioned further realizations are possible.
  • So z. B. Collecting pipes without cross dividers may be provided, d. H . all pipe units of a 3lock unit are flowed through in parallel.
  • the manifold connections are alternately arranged on one and the other manifold tube block side.
  • the collecting channel connections are formed by deflecting tubes, which deflect the medium flowing through from tube units of a block unit into the tube units of at least one adjacent block unit.
  • these tube units of the block units involved then open into a common uranium steering space formed by the deflection tube, which thus integrally comprises the connected collecting channels of these block units.

Abstract

The invention relates to a heat exchanger tubular block (1) comprising a plurality of block units arranged one behind the other in a direction of the block depth. Said block units each comprise a plurality of heat exchanger tubular units (2) which are successively arranged in a direction of the block height, which comprise tubular channels running in a transversal direction of the block, and which have laterally arranged collection channels (8a-11b) belonging thereto that run in a direction of the block height. According to the invention, at least one collection channel connection (13a, 13b, 13c) is provided between at least two adjacent block units (1). Said collection channel connection directly connects a collection channel of one block unit to a collection channel of the other block unit.

Description

Wärrπeüber raσer-Rohrblock und a -Für verwendbares Mehrkammer-Flachrohr Heat over raσer tube block and a -For usable multi-chamber flat tube
Die Erfindung bezieht sich auf einen Wärmeübertrager- Rohrblock nach dem Oberbegrif , des Anspruchs 1 sowie auf ein für einen solchen Rohrblock verwendbares Mehrkammer- Flachrohr .The invention relates to a heat exchanger tube block according to the preamble of claim 1 and to a multi-chamber flat tube that can be used for such a tube block.
Der Rchrblock beinhaltet mehrere Blockeinheiten aus j eweils mehreren stapelförmig übereinanderliegenden Rohreinheiten, wobei die Stapelrichtung eine Blockhochrichtung definiert und die von den Rohreinheiten gebildeten Strömungskanäle in einer dazu senkrechten Blockquerrichtung verlaufen . Die Blockeinheiten sind in der zur Blockhoch- und Blockquerrichtung senkrechten Blocktiefenrichtung hinterei'nanderliegend angeordnet . Die Rohreinheiten münden in Sammelkanäle , die seitlich am Rohrblock in Blockhochrichtung verlaufend, d . h . mit hierzu paralleler Längsachse , angeordnet sind . Vorliegend wird der Begriff " Sammelkanäle " der Einfachkeit halber einheitlich für alle Kanäle verwendet , in welche die Rohreinheiten münden, wobei es sich hierbei um Sammelkanäle im eigentlichen Sinn , in denen das parallel durch mehrere Rohreinheiten durchgeführte Medium zwecks Abführung aus dem Rohrblock gesammelt wird, um Verteilkanäle , in denen das dem Rohrblock zugeführte Medium auf mehrere einmündende Rohreinheiten verteilt wird, sowie um Umlenkkanäle handelt, in denen das Medium von einer ersten Gruppe einmündender Rohreinheiten in eine zweite Gruppe einmündender Rohreinheiten umgelenkt wird.The reverse block contains a plurality of block units each consisting of a plurality of stacked pipe units one above the other, the stacking direction defining a block vertical direction and the flow channels formed by the pipe units running in a block transverse direction perpendicular thereto. The block units are arranged one behind the other in the block depth direction perpendicular to the block vertical and block transverse directions. The pipe units open into collecting channels, which run laterally on the pipe block in the block vertical direction, i. H . with a parallel longitudinal axis are arranged. In the present case, the term "collecting channels" is used uniformly for the sake of simplicity for all channels into which the pipe units open, these being collecting channels in the actual sense in which the medium which is carried out in parallel through several pipe units is collected for the purpose of being discharged from the pipe block Distribution channels in which the medium supplied to the pipe block is distributed over several confluent pipe units as well as deflection channels in which the medium is deflected from a first group of pipe units opening into a second group of pipe units opening.
Im Gebrauch wird der Rohrblock von einem ersten Medium durchströmt, während ein mit dem ersten in Wärmekontakt zu bringendes zweites Medium in Blocktiefenrichtung unter außenseitiger Anströmung der Rohrblockoberflächen über den Rohrblock hinweggeführt wird. Wärmeübertrager mit solchen Rohrblöcken werden z.B. als Verdampfer und Kondensatoren in Kraftfahrzeug-Klimaanlagen eingesetzt. Meist ist der Rohrblock unter Einfügen wärmeleitender Wellrippen zwischen die Rohreinheiten zu einem Rohr-/Rippenblock ergänzt. Die Rohreinheiten können beispielsweise von Flachrohren gebildet sein.In use, the tube block is flowed through by a first medium, while a second medium to be brought into thermal contact with the first is passed over the tube block in the depth direction of the block with outside flow onto the tube block surfaces. Heat exchangers with such tube blocks are e.g. used as evaporators and condensers in automotive air conditioning systems. The pipe block is usually supplemented into a pipe / fin block by inserting heat-conducting corrugated fins between the pipe units. The tube units can be formed, for example, by flat tubes.
Ein gattungsgemäSer Wärmeübertrager-Rohrblock ist in der Of- fenlegungsschrift DE 39 36 101 AI offenbart. Der dortige Rohrblock ist aus Einkammer-Flachrohren aufgebaut, die einmal oder mäanderförmig mehrmals U-förmig um 180° in der Ebene ihrer Quer- und Längserstreckung umgebogen und in der dazu senkrechten Richtung unter Zwischenfügung ' von Wellrippen übereinandergestapelt sind. Je nach Anzahl der Flachrohrwindungen besteht somit der Rohrblock aus zwei oder mehr in Blocktiefenrichtung hintereinanderliegenden Blockeinheiten, von denen jede einen Stapel geradliniger, parallel durch- strömter Flachrohrabschnitte beinhaltet. Benachbarte Blockeinheiten stehen über die seitlichen U-3ögen der Flachrohre in serieller Fluidverbindung. Die beiden Enden jedes Flachrohrs münden an derselben Blockseite in je einen zugehörigen, entlang der 3lockhochrichtung verlaufenden Sammelkanal, wobei die beiden Sammelkanäle von einem längsgeteilten Sammelkasten oder zwei getrennten Sammelrohren gebildet sind.A generic heat exchanger tube block is disclosed in the published patent application DE 39 36 101 AI. The tube block local is composed of single-chamber flat tubes, the U-shape are bent over by 180 ° in the plane of its transversal and longitudinal extension and stacked in the direction perpendicular thereto with the interposition 'corrugated fin once or meander several times. Depending on the number of flat tube turns, the tube block thus consists of two or more block units located one behind the other in the block depth direction, each of which contains a stack of rectilinear, parallel-flowed flat tube sections. Adjacent block units are in serial fluid communication via the side U-3 arches of the flat tubes. The two ends of each flat tube open on the same side of the block into an associated collecting duct running along the 3lock vertical direction, the two collecting ducts being formed by a longitudinally divided collecting box or two separate collecting pipes.
Der Erfindung liegt als technisches Problem die Bereitstellung eines Wär eübertrager-Rohrblocks der eingangs genannten Art, mit dem ein Wärmeübertrager mit hohem Wärmeübertragungs- vermögen und hoher Druckstabilität bei relativ geringer Füll- menge und mit der Möglichkeit einer variablen Führung des hindurchgeleiteten Temperiermediums realisierbar ist, sowie eines zum Aufbau eines solchen Rohrblocks besonders geeigneten Mehrkammer-Flachrohres zugrunde.The invention is a technical problem of providing a heat exchanger tube block of the type mentioned at the outset, with which a heat exchanger with high heat transfer capacity and high pressure stability with a relatively low filling capacity quantity and with the possibility of variable guidance of the temperature control medium passed through, as well as a multi-chamber flat tube which is particularly suitable for the construction of such a tube block.
Die Erfindung löst dieses Problem durch die Bereitstellung eines Wärmeübertrager-Rohrblocks mit d-'en Merkmalen des Anspruchs 1 sowie eines Mehrkammer-Flachrohres mit den Merkmalen des. Anspruchs 11.The invention solves this problem by providing a heat exchanger tube block with the features of claim 1 and a multi-chamber flat tube with the features of claim 11.
Beim Wärmeübertrager-Rohrblock nach Anspruch 1 ist zwischen wenigstens zwei benachbarten Blockeinheiten wenigstens eine Sammelkanalverbindung vorgesehen, die einen Sammelkanal der einen Blcckeinheit direkt mit einem Sammelkanal der anderen Blockeinheit verbinden. Mit der Bezeichnung "direkt" ist dabei gemeint, daß die betreffenden Sammelkanäle über eine entsprechende, in Blocktiefenrichtung verlaufende Fluidverbin- dung und nicht oder jedenfalls nicht nur über eine oder mehrere der Rohreinheiten des Blocks in Verbindung stehen. Mit Hilfe dieser einen oder vorzugsweise mehreren direkten Fluidverbindungen der seitlich des Rohrblocks angeordneten Sammelkanäle läßt sich eine sehr variable, an den jeweiligen Anwendungsfall angepaßte Strömungsführung des hindurchgeleiteten Mediums, z.B. eines Kältemittels einer Klimaanlage, realisieren. Durch die mehreren, in 31ocktiefenrichtung und damit der Strömungsrichtung des über den Rohrblock hinweggeführten anderen Mediums hintereinanderliegenden Blockeinheiten läßt sich ein hohes Wärmeübertragungsvermögen für den Rohrblock erzielen. Der Rohrblock kann aus extrudierten Flachrohren mit hinsichtlich geringer Füllmenge, d.h. geringem zu durchströmendem Volumen des Rohrblocks, und hoher Druckstabilität optimierten Kanälen aufgebaut sein. Die seitlich am Rohrblock angeordneten Sammelkanäle können von hoch druckstabilen Sammelrohren mit relativ geringem Querschnitt gebildet sein, insbesondere wenn entsprechend schmale Flachrohreinheiten oder solche mit zur Sammelkanallängsrichtung hin aus der Querebene herausgedrehten Flachrohrenden verwendet werden.In the heat exchanger tube block according to claim 1, at least one collecting duct connection is provided between at least two adjacent block units, which connect a collecting duct of the one block unit directly to a collecting duct of the other block unit. The term "direct" means that the relevant collecting channels are connected via a corresponding fluid connection running in the block depth direction and not or at least not only via one or more of the pipe units of the block. With the help of these one or preferably several direct fluid connections of the collecting channels arranged on the side of the pipe block, a very variable flow control of the medium passed through, adapted to the respective application, for example a refrigerant of an air conditioning system, can be realized. A high heat transfer capacity for the pipe block can be achieved by the several block units lying one behind the other in the 31ock depth direction and thus the flow direction of the other medium passed over the pipe block. The tube block can be constructed from extruded flat tubes with channels optimized with regard to a small filling quantity, ie a small volume of the tube block to be flowed through, and high pressure stability. The collecting ducts arranged on the side of the pipe block can be formed by highly pressure-stable collecting pipes with a relatively small cross-section, in particular if correspondingly narrow flat pipe units or those with the longitudinal direction of the collecting duct flat tube ends turned out from the transverse plane can be used.
Bei einem nach Anspruch 2 weitergebildeten Rohrblock sind direkte Sammelkanalverbindungen zwischen jedem Paar benachbarter Blockeinheiten dergestalt vorgesehen, daß die Blockeinheiten vom zugehörigen Temperiermedium-, seriell durchströmt werden .In a tube block further developed according to claim 2, direct collecting channel connections between each pair of adjacent block units are provided such that the block units are flowed through in series by the associated temperature control medium.
Bei einem nach Anspruch 3 weitergebildeten Rohrblock ist ein Sammelraum, der z.B. durch ein Sammelrohr oder einen Ξammel- kasten gebildet ist, durch Quertrennwände in mehrere Sammelkanäle unterteilt. Dadurch läßt sich eine schlangenlinien- förmige, einmal oder mehrmals umgelenkte Durchströmung einer jeweiligen Blockeinheit verwirklichen.In a tube block developed according to claim 3 is a collecting space, which e.g. is formed by a collecting pipe or a collecting box, divided into several collecting channels by transverse partition walls. This allows a serpentine flow, once or several times deflected, to flow through a respective block unit.
Bei einem nach Anspruch 4 weitergebildeten Rohrblock sind die Sammelkanäle auf wenigstens einer Blockseite von einzelnen, jeweils einer Blockeinheit zugeordneten Sammelrohren gebildet, die in Blocktiefenrichtung voneinander beabstandet sind, was z.B. bei Verwendung in einem Verdampfer' den Kondenswas- serablauf erleichtert. Die Beabstandung wird durch ein oder mehrere Distanzelemente bewerkstelligt, die an den Sammelrohren angeformt oder an diesen angebracht sind.In still another embodiment according to claim 4 tube block, the collection channels on at least one side of the block of individual, each unit block of the associated header tubes are formed, which are spaced apart in the block depth direction, such as "serablauf facilitates Condensation when used in an evaporator. The spacing is brought about by one or more spacer elements which are molded onto or attached to the header tubes.
In weiteren Ausgestaltungen dieser Maßnahme beinhaltet das Distanzelement gemäß Anspruch 5 ein umgeformtes Blechstück oder Rohrstück mit wenigstens einer Schlitzöffnung oder gemäß Anspruch 5 einen nach außen ausgebauchten Durchlaß an einem Sammelrohr. Die so gestalteten Distanzelemente halten die Sammelrohre auf Abstand und definieren gleichzeitig eine jeweilige Sammelkanalverbindung. In weiterer Ausgestaltung der Erfindung gemäß Anspruch 7 kann das Distanzelement aus zwei fluiddicht aneinanderstoßenden oder ineinandergreifenden Durchlässen bestehen, wozu wenigstens einer der beiden Durchlässe nach außen ausgebaucht ist . Bei einem nach Anspruch 8 weitergebildecen Rohrblock sind die Rohreinheiten von geradlinigen Flachrchrabschnitten gebildet, die mit tordierten Rohrenden in die Sammelrohre münden. Durch die endseitige Tordierung sind die Flachrohrenden aus der Querebene der Sammelrohre herausgedreht:, was es ermöglicht, Sammelrohre mit gegenüber der Flachr-phrbrεite geringerem In- nendurchmesser zu verwenden, um das innere Volumen des Rohrblocks gering zu halten.In further embodiments of this measure, the spacer element according to claim 5 includes a formed sheet metal piece or tube piece with at least one slot opening or according to claim 5, an outwardly bulged passage on a collecting tube. The spacer elements designed in this way keep the manifolds at a distance and at the same time define a respective manifold connection. In a further embodiment of the invention according to claim 7, the spacer element can consist of two passages which abut or engage in one another in a fluid-tight manner, for which purpose at least one of the two passages is bulged outwards. In a tube block further developed according to claim 8, the tube units are formed by straight flat sections which open into the header tubes with twisted tube ends. Due to the twisting at the end, the flat tube ends are twisted out of the transverse plane of the header tubes, which makes it possible to use header tubes with an inner diameter that is smaller than that of the flat tube, in order to keep the inner volume of the tube block low.
Ein nach Anspruch 9 weitergebildeter Rohrblock ist zu einem Rσhr-/Rippenblock ergänzt. Dabei kann für jede Wellrippenschicht eine einzelne Wellrippe eingebracht sein, deren Breite im wesentlichen der gesamten Blockriefe entspricht, oder es sind mehrere Wellrippen nebeneinanderliegend vorgesehen, die von gleicher oder unterschiedlicher Breite und Struktur sein können.A tube block developed according to claim 9 is supplemented to a tube / rib block. For each corrugated fin layer, a single corrugated fin can be introduced, the width of which essentially corresponds to the entire block groove, or several corrugated fins are provided next to one another, which can be of the same or different width and structure.
Bei einem nach Anspruch 10 weitergebildeten Rohrblock sind wenigstens zwei in Blocktiefenrichuung nebeneinanderliegende Rohreinheiten als integrale Teile eines einstückigen Mehrkammer-Flachrohres realisiert, wozu sich dieses in der Breite über entsprechend viele Blockeinheiten erstreckt.In a tube block developed according to claim 10, at least two tube units lying next to one another in the block depth direction are realized as integral parts of a one-piece multi-chamber flat tube, for which purpose the width extends over a corresponding number of block units.
Das Mehrkammer-Flachrohr nach Anspruch 11 eignet sich insbesondere zum Aufbau eines Rohrblocks gemäß Anspruch 10. Es ist endseitig durch einen oder mehrere Längsschlitze in eine Mehrzahl von separaten Endsegmenten unterteilt, die um je eine eigene Längsachse tordiert sind. 3ei einem aus solchen Flachrohren aufgebauten Rohrblock sind dann die Endsegmente jedes Flachrohrendbereichs einzeln den entsprechenden Blockeinheiten zugeordnet, so daß die Kammern eines jeden Flach- rσhres gruppenweise auf die entsprechenden Blockeinheiten aufgeteilt: sind, wobei jeweils die aus einem Ξndsegment ausmündenden Kammern zu einer Blockeinheic gehören. Vorteilhafte Aufsführungsformen der Erfindung sind in den Zeichnungen dargestellt und werden nachfolgend beschrieben. Hierbei zeigen:The multi-chamber flat tube according to claim 11 is particularly suitable for the construction of a tube block according to claim 10. It is divided at the end by one or more longitudinal slots into a plurality of separate end segments, each of which is twisted about its own longitudinal axis. In the case of a tube block constructed from such flat tubes, the end segments of each flat tube end region are then individually assigned to the corresponding block units, so that the chambers of each flat tube are divided into groups on the corresponding block units, the chambers emanating from an end segment each belonging to a block unit. Advantageous embodiments of the invention are shown in the drawings and are described below. Here show:
Fig. 1 eine schematische Seitenansicht einer von mehreren Blockeinheiten eines Rohr-/Rippenblocks für einen Verdampfer einer Klimaanlage,1 is a schematic side view of one of several block units of a tube / fin block for an evaporator of an air conditioning system,
Fig. 2 eine schematische Seitenansicht einer seitlichen Sam- melrohranordnung des Rohr-/Rippenblocks von Fig. 1,FIG. 2 shows a schematic side view of a lateral collecting tube arrangement of the tube / fin block from FIG. 1, FIG.
Fig. 3 eine schematische Querschnittsansicht einer ersten Realisierung direkter Fluidverbindungen zwischen Sammelkanälen der Sammelrohre von Fig. 2,3 shows a schematic cross-sectional view of a first realization of direct fluid connections between collecting channels of the collecting pipes from FIG. 2,
Fig. 4 eine schematische Querschnittsansicht einer zweiten Realisierung der Sammelkanalverbindungen,4 shows a schematic cross-sectional view of a second realization of the collecting duct connections,
Fig. 5 eine schematische Querschnittsansicht einer dritten Realisierung der Sammelkanalverbindungen,5 shows a schematic cross-sectional view of a third realization of the collecting duct connections,
Fig. 6 eine schematische Querschnittsansicht einer vierten Realisierung der Sammelkanalverbindungen und6 shows a schematic cross-sectional view of a fourth realization of the collecting duct connections and
Fig. 7 eine sche acische, teilweise Draufsicht auf ein für den Rohr-/Rippenblock von Fig. 1 verwendbares Mehrkammer-Flachrohr.FIG. 7 is a schematic, partial top view of a multi-chamber flat tube that can be used for the tube / fin block of FIG. 1.
Fig. 1 zeigt eine Rohrblockeinheit l, von denen mehrere in Blocktiefenrichtung, d.h. senkrecht zur Zeichenebene hinter- einanderliegend, angeordnet sind und dadurch einen Rohr- /Rippenblock bilden, der beispielsweise als Parallelstrom- Verdampfer mit variabler Kältemittelführung in einer Kraftfahrzeug-Klimaanlage verwendbar ist. Die jeweilige Blockeinheit 1 beinhaltet einen Stapel von in Blockhochrichtung aufeinanderfolgenden, d.h. übereinandergestapelten Mehrkammer- Flachrohreinheiten 2, deren Kammern, d.h. Strömungskanäle, in Blockquerrichtung, d.h. senkrecht zur Blocktiefen- und Blockhochrichtung, verlaufen. In ihren Endbereichen 3a, 3b sind die Flachrohreinheiten 2, die ansonsten in Ebenen senkrecht zur Blockhochrichtung liegen, um einen vorgebbaren Torsions- winkel um ihre Längs ittelachse, alternativ um eine dazu parallele Achse, tordiert. Der Torsionsw.inkel ist beliebig zwischen 0° und 90° wählbar, wobei in Fig. 1 beispielhaft eine Tordierung um 90° gewählt ist. Zwischen die Flachrohreinheiten 2 sind wärmeleitende Wellrippen 6 eingebracht.1 shows a pipe block unit 1, several of which are arranged one behind the other in the block depth direction, that is to say perpendicular to the drawing plane, and thereby form a pipe / fin block which can be used, for example, as a parallel-flow evaporator with variable refrigerant guidance in a motor vehicle air conditioning system. The respective block unit 1 contains a stack of successive, ie stacked, multi-chamber flat tube units 2 in the block vertical direction, the chambers of which, ie flow channels, in Block cross direction, ie perpendicular to the block depth and block vertical direction. In their end regions 3a, 3b, the flat tube units 2, which otherwise lie in planes perpendicular to the block vertical direction, are twisted by a predeterminable torsion angle about their longitudinal center axis, alternatively about an axis parallel to them. The torsion angle can be chosen as desired between 0 ° and 90 °, with a torsion of 90 ° being selected as an example in FIG. 1. Heat-conducting corrugated fins 6 are introduced between the flat tube units 2.
Mit ihren tordierten Enden 3a, 3b münden die Flachrohreinheiten 2 in jeweilige, an entgegengesetzten Rohrblockseiten vorgesehene Sammelrohre 4a, 5a, die mit zur Blockhochrichtung paralleler Längsachse angeordnet sind. Dabei sind die Flachrohrenden 3a, 3b fluiddicht in entsprechende Schlitze der Sammelrohre 4a, 5a eingefügt. Im Fall von um 90° tordierten Rohrenden verlaufen diese Längs'schlitze parallel zur Sammel- rohr-Längsachse, was die Verwendung von Ξammelrohren 4a, 5a mit besonders kleinem Innendurchmesser ermöglicht. Denn letzterer braucht im Extremfall dann nur wenig größer als die Dicke der Flachrohreinheiten 2 sein. Je nach Bedarf sind die am jeweiligen Sammelrohr 4a, 5a eingebrachten Längsschlitze durch schmale Stege voneinander getrennt oder zu einem durchgehenden Längsschlitz vereinigt.With their twisted ends 3a, 3b, the flat tube units 2 open into respective header tubes 4a, 5a, which are provided on opposite tube block sides and are arranged with a longitudinal axis parallel to the vertical direction of the block. The flat tube ends 3a, 3b are inserted in a fluid-tight manner in corresponding slots in the header tubes 4a, 5a. In the case of pipe ends twisted by 90 °, these longitudinal slots run parallel to the longitudinal axis of the collecting pipe, which enables the use of collecting pipes 4a, 5a with a particularly small inside diameter. In extreme cases, the latter then only needs to be slightly larger than the thickness of the flat tube units 2. Depending on requirements, the longitudinal slots made on the respective collecting pipe 4a, 5a are separated from one another by narrow webs or are combined to form a continuous longitudinal slot.
Fig. 2 zeigt eine Anordnung von vier parallel in Blocktiefenrichtung nebeneinanderliegenden Sammelrchren 4a, 4b, 4c, 4d, wie sie an der in Fig. 1 rechten Rohrblockseite für den beispielhaft angenommenen Fall vorgesehen sind, daß der Rohrblock aus vier hinteinanderliegenden Blockeinheiten 1 aufgebaut ist. Auf der gegenüberliegenden Rohrblockseite sind dann dazu korrespondierend ebenfalls vier Sammelrohre angeordnet . Die in Fig. 2 dargestellte Seite bildet die Anschlußseite des Rohrblocks, wobei für die in Fig. 1 und 2 gewählte, durch Strcmungspfeile veranschaulichte Strömungsrichtung das durch den Rohrblσck hindurchgeleitete Medium dem in Fig. 2 linken Sammelrohr 4a zugeführt und aus dem in Fig. 2 rechten Sammel- rohr 4d wieder abgeführt wird. Es versteht sich, daß alternativ die entgegengesetzte Strömungsrichtung möglich ist. Die in Fig. 2 gezeigten Sammelrohre 4a bis 4d sind durch je eine Quertrennwand 7a bis 7d in je zwei getrennte Sammelkanäle 8a, 8b; '9a, 9b; 10a, 10b; 11a, 11b unterteilt. Im Gegensatz dazu sind die gegenüberliegenden Sammelrohre ungeteilt und bilden daher je einen einzigen Sammelkanal 12, 'wie in Fig. 1 am linken Sammelrohr 5aa veranschaulicht. Dies hat zur Folge, daß die ungeteilten Sammelrohre auf der in Fig. 1 linken Blockseite als ümlenkrohre fungieren, die das vom einen Teil der Flachrohreinheitεn, die auf der gegenüberliegenden Seite parallel in den einen Sammelkanal 8a münden, in den anderen Teil der Flachrohreinheiten umlenken, die gegenüberliegend in den anderen Sammelkanal 8b münden. Dieses Strömungsverhalten ist ebenfalls in Fig. 1 zu erkennen.FIG. 2 shows an arrangement of four collecting channels 4a, 4b, 4c, 4d lying next to one another parallel in the block depth direction, as are provided on the right side of the tube block in FIG. 1 for the assumed case that the tube block is composed of four block units 1 lying one behind the other. On the opposite side of the tube block, four header tubes are then also arranged correspondingly. The side shown in FIG. 2 forms the connection side of the pipe block, whereby for the flow direction selected in FIGS. 1 and 2, illustrated by flow arrows, the medium passed through the pipe block is fed to the collecting pipe 4 a on the left in FIG. 2 and from the one shown in FIG. 2 right collective pipe 4d is discharged again. It is understood that alternatively the opposite flow direction is possible. The header pipes 4a to 4d shown in FIG. 2 are each divided into two separate header channels 8a, 8b by a transverse partition 7a to 7d; ' 9a, 9b; 10a, 10b; 11a, 11b divided. In contrast to this, the opposite collecting tubes are undivided and therefore each form a single collecting channel 12, as illustrated in FIG. 1 on the left collecting tube 5aa. This has the consequence that the undivided manifolds on the left side of the block in FIG. 1 act as deflecting tubes, which deflect that from one part of the flat tube units, which open in parallel on the opposite side into the one collecting duct 8a, into the other part of the flat tube units, which open opposite to the other collecting channel 8b. This flow behavior can also be seen in FIG. 1.
Um das Strömungsmedium von einer. zu einer, nächsten Blockeinheit weiterzuleiten, d.h. die Blockeinheiten strömungstech- nisch seriell zu verbinden, ist. zwischen je zwei benachbarten der vier Sammelrohre 4a bis 4d von Fig. 2 eine Sammelkanalverbindung 13a, 13b, 13c vorgesehen, in denen eine direkte Fluidverbindung in Blocktiefenrichtung zwischen den zugehörigen Strömungskanälen geschaffen ist. Dabei sind die Sammelkanalverbindungen 13a bis 13c, wie aus Fig. 2 zu erkennen, dergestalt alternierend angeordnet, daß von den beiden Sammelkanälen eines jeden innenliegenden Sammelrohres 4b, 4c der eine mit dem benachbarten Sammelkanal eines auf der einen Seite angrenzenden Sammelrohres und der andere mit dem benachbarten Sammelkanal eines auf der anderen Seite angrenzenden Sammelrohres verbunden ist. Auf diese Weise wird das Temperiermedium seriell durch die hintereinanderliegenden Blockeinheiten geführt, wobei es jede Blockeinheit mäanderförmig durchströmt .To the flow medium from a. forward to a next block unit, i.e. the block units must be connected serially in terms of flow technology. A collecting duct connection 13a, 13b, 13c is provided between each two adjacent ones of the four collecting pipes 4a to 4d of FIG. 2, in which a direct fluid connection is created in the block depth direction between the associated flow ducts. The collecting duct connections 13a to 13c, as can be seen from FIG. 2, are arranged alternately in such a way that of the two collecting ducts of each inner collecting pipe 4b, 4c, one with the neighboring collecting duct of a collecting pipe adjacent on one side and the other with the adjacent collecting duct of a collecting pipe adjoining on the other side is connected. In this way, the temperature control medium is guided serially through the block units located one behind the other, whereby it flows through each block unit in a meandering manner.
Bei dem in den Fig. 1 und 2 gezeigten Strömungsverlauf gelangt das Temperiermedium über eine seitliche Einlaßöffnung 14 in den zugehörigen Sammelkanal 8a des einen endseitigen Sammelrohres 4a. Dieser Sammelkanal 8a fungiert als Verteiler, der das Medium auf den in ihn einmündenden ersten Teil paralleler Flachrohreinheiten 2 der betreffenden Blockeinheit 1 aufteilt . Nach Durchströmen dieser Gruppe von Flachrohreinheiten 2 gelangt das Medium in das gegenüberliegende Sarnmel- bzw. Umlenkrohr 5a, wo es in den restlichen Teil der Flachrohreinheiten 2 dieser Blockeinheit 1 umgelenkt wird, um durch diese Flachrohreinheiten hindurch in den anderen Sammelkanal 8b des eintrittsseitigen Sammelrohres 4a zu strömen. Von dort wird das Medium über die entsprechende Sammelkanalverbindung 13a in den benachbarten Sammelkanal 9a des angrenzenden Sammelrohres 4b und damit zur nächsten Blockeinheit weitergeleitet. Diese Blockeinheit durchströmt es, wie aus den Fig. 1 und 2 ersichtlich, in der zur. Durchströmung der ersten, eintrittsseitigen Blockeinheit gegensinnigen Weise. Die Durch- strömungsrichtungen sind in Fig. 2 des weiteren dadurch veranschaulicht, daß in denjenigen - Sammelkähälen, in denen das Temperiermedium in die Zeichenebene hinein weitergeleitet wird, die hierfür üblichen gekreuzten Kreise eingezeichnet sind, während in den anderen Sammelkanälen, die als Sammler wirken und in die das Medium von hinten in die Zeichenebene eintritt, die hierfür üblichen gepunkteten Kreise eingezeichnet sind. Nach Durchströmung der zweiten Blockeinheit gelangt das Medium somit in den sammelnden Sammelkanal 9b dieser Blockeinheit und wird von dort zum verteilenden, benachbarten Sammelkanal 10a über die entsprechende Sammelkanalverbindung 13b zur nächsten Blockeinheit weitergeleitet. Diese dritte Blockeinheit wird dann ersichtlich wieder in der zur ersten Blockeinheit gleichsinnigen Weise durchströmt. Von deren sammelndem Sammelkanal 10b gelangt das Medium über die zugehörige Sammelkanalverbindung 13c zur vierten Blockeinheit, die wiederum in gleicher Weise wie die zweite Blockeinheit durchströmt wird. Vom sammelnden Sammelkanal 11b der vierten Blok- keinheit wird das Temperiermedium dann über einen stirnseitigen Auslaß 15 vom Rohrblock abgeführt . Es versteht sich, daß alternativ zu diesem gezeigten Beispie-1 auch weniger oder mehr als vier Blockeinheiten seriell in der beschriebenen Weise hintereinandergeschaltet sein können. Des weiteren versteht sich, daß Gestalt und Positionierung von Einlaß- und Auslaßöffnung gegenüber dem gezeigten Beispiel beliebig modifiziert sein können, um das Temperiermedium in einer an den jeweiligen Anwendungsfall ^ m besten angepaßten Weise dem Rohrblock zuzuführen und von dort wieder abzuführen. Als weitere Alternative können zusätzliche Quertrennwände in den Sammelrohren beidseits der jeweiligen Blockeinheit vorgesehen sein, um das Temperierfluid unter mehrmaliger Richtungsumkehr mäanderförmig durch die Blockeinheit hindurchzuführen. Eine weitere Modifikation besteht darin, Einlaß- und Auslaßöffnung nicht wie gezeigt an derselben, sondern an gegenüberliegenden Rohrblockseiten vorzusehen.In the flow profile shown in FIGS. 1 and 2, the temperature control medium reaches the associated collecting duct 8a of one end via a lateral inlet opening 14 Manifold 4a. This collecting duct 8a functions as a distributor, which divides the medium into the first part of parallel flat tube units 2 of the block unit 1 in question which flows into it. After flowing through this group of flat tube units 2, the medium reaches the opposite Sarnmel or deflection tube 5a, where it is deflected in the remaining part of the flat tube units 2 of this block unit 1, in order to pass through these flat tube units into the other collecting duct 8b of the inlet-side collecting tube 4a stream. From there, the medium is forwarded via the corresponding collecting duct connection 13a into the adjacent collecting duct 9a of the adjacent collecting pipe 4b and thus to the next block unit. This block unit flows through it, as can be seen from FIGS. 1 and 2, in the. Flow through the first, inlet-side block unit in opposite directions. The flow directions are further illustrated in FIG. 2 by the fact that in those collecting channels in which the temperature control medium is passed on to the drawing plane, the crossed circles customary for this are drawn in, while in the other collecting channels which act as collectors and into which the medium enters the drawing plane from behind, the usual dotted circles are drawn. After flowing through the second block unit, the medium thus arrives in the collecting collecting duct 9b of this block unit and is forwarded from there to the distributing, neighboring collecting duct 10a via the corresponding collecting duct connection 13b to the next block unit. This third block unit is then again flowed through in the same direction as the first block unit. From its collecting channel 10b, the medium passes through the associated channel connection 13c to the fourth block unit, which in turn flows through in the same way as the second block unit. The temperature control medium is then discharged from the tube block via an end outlet 15 from the collecting collecting channel 11b of the fourth block unit. It goes without saying that, as an alternative to this example 1, fewer or more than four block units can also be connected in series in the manner described. Furthermore, it goes without saying that the shape and positioning of the inlet and outlet openings can be modified as desired in relation to the example shown in order to supply the temperature control medium to the pipe block in a manner which is best adapted to the respective application and to discharge it again from there. As a further alternative, additional transverse partition walls can be provided in the header pipes on both sides of the respective block unit in order to guide the temperature-control fluid through the block unit in a meandering manner with repeated reversal of direction. Another modification is to provide the inlet and outlet openings not on the same as shown, but on opposite pipe block sides.
Wie in der schematischen Ansicht- von Fig. 2 angedeutet, sind die Sammelrohre 4a bis 4d an der jeweiligen Rohrblockseite mit Abstand voneinander angeordnet, was z.B. beim Einsatz als Verdampfer den Kondenswasserablauf erleichtert . Dies wird mit Distanzelementen 16a, 16b, 16c erreicht, die gleichzeitig die direkten Sammelkanal-Fluidverbindungen 13a, 13b, 13c bereitstellen. Verschiedene Realisierungen hierfür sind in den Fig. 3 bis 6 dargestellt. Im Beispiel von Fig. 3 ist als Distanzelement eine geeignet umgeformte Rohrhülse 17 vorgesehen, die an zwei radial gegenüberliegenden Stellen ihres Umfangs mit Längsschlitzen 18a, 18b versehen ist, deren Schlitzränder Anschlußstutzen bilden, die fluiddicht in korrespondierende Längsschlitze zweier zu verbindender Sammelrohre 19a, 19b eingefügt sind. Die auf diese Weise ein rohrförmiges Übergangsstück bildende Rohrhülse 17 ist stirnseitig geschlossen und fixiert: die beiden fluidverbundenen Sammelrohre 19a, 19b im gewünschten Abstand.As indicated in the schematic view of Fig. 2, the header pipes 4a to 4d are arranged on the respective pipe block side at a distance from one another, which e.g. when used as an evaporator, the condensate drainage easier. This is achieved with spacer elements 16a, 16b, 16c, which simultaneously provide the direct collecting channel fluid connections 13a, 13b, 13c. Various implementations for this are shown in FIGS. 3 to 6. In the example of FIG. 3, a suitably shaped tubular sleeve 17 is provided as a spacer element, which is provided at two radially opposite points on its circumference with longitudinal slots 18a, 18b, the slot edges of which form connecting pieces which are inserted in a fluid-tight manner in corresponding longitudinal slots of two header pipes 19a, 19b to be connected are. The tubular sleeve 17, which thus forms a tubular transition piece, is closed and fixed at the end: the two fluid-connected header tubes 19a, 19b at the desired distance.
Im Beispiel von Fig. 4 dient als Distanzelement ein geeignet geformtes, lotplattiertes Blechstüc.k 20, in das eine Öffnung 21 eingebracht ist, die mit Längsschlitzen 22, 23 angrenzen- der Sammelrohre 24, 25 eine durchgehende Fluidverbindung zwischen den von den Sammelrohren 24, 25 definierten Sammelkanälen bildet. Weiter sind in Fig. 4 zwei Flachrohre 2a, 2b benachbarter Rohrblockeinheiten wiedergegeben, die mit rechtwinklig tordierten Rohrenden in korrespondierende Längs- schlitze der Sammelrohre 24, 25 flu^ddicht eingefügt sind. Wie durch entsprechende Strömungspfeiϊe angedeutet, strömt das Temperiermedium vom einen Flachrohr 2a und ggf. weiteren, parallelen Flachrohren derselben Blockeinheit in den Ξam- melkanal des zugehörigen Ξammelrohres 24 und wird über die direkte Sammelkanalverbindung in den Sammelkanal des benachbarten Sammelrohrs 25 weitergeleitet und dann in die dort mündenden Flachrohre 26 der betreffenden, nächsten Rohrblockeinheit verteilt.In the example of FIG. 4, a suitably shaped, solder-plated sheet metal piece 20 is used as a spacer element, into which an opening 21 is made, which adjoins with longitudinal slots 22, 23. the collecting pipes 24, 25 forms a continuous fluid connection between the collecting channels defined by the collecting pipes 24, 25. Furthermore, two flat tubes 2a, 2b of adjacent tube block units are shown in FIG. 4, which are inserted with correspondingly twisted tube ends into corresponding longitudinal slots of the header tubes 24, 25 in a fluid-tight manner. As indicated by appropriate flow arrows, the temperature control medium flows from a flat tube 2a and possibly further parallel flat tubes of the same block unit into the collecting channel of the associated collecting tube 24 and is forwarded via the direct collecting channel connection into the collecting channel of the adjacent collecting tube 25 and then into there distributed flat tubes 26 of the next tube block unit concerned.
Die Festlegung des lotplattierten Blechstücks 20 an den Sammelrohren 24, 25 erfolgt durch ' ein geeignetes Lötverfahren, wobei das vorherige Lotplattieren nach irgendeinem herkömmlichen Verfahren erfolgen kann, z.B. durch galvanisches Verzinken oder das sogenannte CD-Verfahren. Dabei kann ein gemeinsamer Lötprozeß sowohl zur Verbindung der Distanzelemente 20 mit den Sammelrohren 24, 25 als auch zur fluiddichten Verbindung der Flachrohreinheiten mit den Sammelrohren 24, 25 vorgesehen sein, wozu die Flachrohre und/oder die Sammelrohre ebenfalls lotplattiert vorgefertigt und mit Flußmittel versehen werden. Alternativ können unplattierte Sammelrohre 24, 25 verwendet und separate Lotformteile an den Verbindungsstellen eingebracht werden. Auch mit den im Beispiel von Fig. 4 verwendeten Distanzelementen 20 werden die fluidverbundenen Sammelrohre 24, 25 in einem gewünschten Abstand voneinander gehalten.The definition of the solder-plated sheet metal piece 20 to the manifolds 24, 25 is carried by 'a suitable soldering, the previous solder plating can be performed by any conventional method, for example by galvanizing, or the so-called CD method. A common soldering process can be provided both for connecting the spacer elements 20 to the header tubes 24, 25 and for the fluid-tight connection of the flat tube units to the header tubes 24, 25, for which purpose the flat tubes and / or the header tubes are also prefabricated with solder and provided with flux. Alternatively, unplated manifolds 24, 25 can be used and separate molded solder parts can be introduced at the connection points. The fluid-connected manifolds 24, 25 are also kept at a desired distance from one another with the spacer elements 20 used in the example of FIG. 4.
Die Fig. 5 und 6.zeigen Beispiele, bei denen die Distanzelemente durch entsprechende Ausbauchungen an den verbundenen Sammelrohren selbst gebildet sind. In der Ausführungsform von Fig. 5 sind Sammelrohre 26, 27 verwendet, die an den Verbindungsstellen mit domförmigen Ausbauchungen 28, 29 versehen sind, die eine jeweilige Durchgangsöffnung 30, 31 umgeben. Die zu verbindenden Sammelrohre 26, 27 sind mit ihren domför- migen Ausbauchungen 28, 29 aneinanderstoßend fluiddicht zusammengefügt, so daß sich einerseits dort die gewünschte Fluidverbindung ergibt und die Sammelrohre 26, 27 andererseits im Bereich außerhalb der Verbindungsstelle wie gewünscht auf Abstand gehalten sind.5 and 6 show examples in which the spacer elements themselves are formed by corresponding bulges on the connected manifolds. In the embodiment of FIG. 5, collecting tubes 26, 27 are used, which are provided with dome-shaped bulges 28, 29 at the connection points are, which surround a respective through opening 30, 31. The header pipes 26, 27 to be connected are joined together with their dome-shaped bulges 28, 29 in a fluid-tight manner so that the desired fluid connection is obtained there and the header pipes 26, 27 are kept at a distance in the area outside the connection point as desired.
Beim Beispiel von Fig. 6 sind miteinander zu verbindende Sammelrohre 32, 33 mit unterschiedlichen, ineinanderpassenden domförmigen Ausbauchungen 34, 35 versehen, die zugehörige Durchgangsöffnungen umgeben. Die engere Ausbauchung 35 ist in die korrespondierende Ausbauchung 34 größerer Weite eingesteckt und in ihr fluiddicht festgelegt, vorzugsweise mittels Dichtlöten.In the example of FIG. 6, header pipes 32, 33 to be connected to one another are provided with different, intermeshing dome-shaped bulges 34, 35, which surround associated through openings. The narrower bulge 35 is inserted into the corresponding bulge 34 of greater width and fixed in it in a fluid-tight manner, preferably by means of sealing soldering.
In allen beschriebenen Beispielen, können bei der Vorfertigung der benötigten Sammelrohre die zum Einfügen der Rohreinheiten benötigten Schlitze in einem Arbeitsgang mit den für die direkte Sammelkanal-Fluidverbindung benötigten Schlitzen, d.h. Durchzügen, und gegebenenfalls den zugehörigen domförmigen Ausbauchungen erzeugt werden. Die Durchlässe für die direkten Sammelkanal-Fluidverbindungen können rund oder länglich ausgebildet sein. Die beiden eine jeweilige Sammelkanal- Fluidverbindung bildenden, domförmigen Ausbauchungen brauchen nicht, wie in den gezeigten Beispielen, beide nach außen ausgebaucht sein, vielmehr kann alternativ eine von beiden nach innen ausgebaucht sein, in die dann die andere, nach außen weisende Ausbauchung eingreift.In all of the examples described, in the prefabrication of the required manifolds, the slots required for inserting the tube units can be made in one operation with the slots required for the direct manifold fluid connection, i.e. Passages, and possibly the associated dome-shaped bulges are generated. The passages for the direct collecting channel fluid connections can be round or elongated. The two dome-shaped bulges forming a respective collecting channel-fluid connection do not need, as in the examples shown, both to be bulged outwards, but alternatively one of the two can be bulged inwards, in which the other bulge facing outwards engages.
Wie in Fig. 4 angedeutet, können die Flachrohreinheiten 2 des Rohr-/Rippenblocks von Fig. 1 aus in Blocktiefenrichtung nebeneinanderliegenden, für jede Blockeinheit 1 einzelnen Flachrohren 2a, 2b bestehen, d.h. jede Blockeinheit 1 besteht in diesem Fall aus einem Stapel einzelner Flachrohre, deren Breite im wesentlichen der Tiefe der jeweiligen Blockeinheit entspricht. Alternativ kann ein breiterer Flachrohrtyp in ei- ner Weise verwendet werden, wie dies in Fig. 7 schematisch und ausschnittweise illustriert ist. Das dort gezeigte Mehrkammer-Flachrohr 2c besitzt eine Breite T, die im wesentlichen der gesamten Rohrblocktiefe, d.h. der Summe der Tiefen der einzelnen Blockeinheiten entspricht. Das Flachrohr 2c ist in beiden Endbereichen, von denen in.,Fig. 7 einer dargestellt ist, mit einer vorgebbaren Anzahl n vo'ή längsverlaufenden Sägeschnitten 36-L, 362, 363, d.h. in diesem Beispiel n=3 Schnitten versehen, wodurch der Endbereich in eine Anzahl n+1 von Endsegmenten 37x bis 374, d.h. im gezeigten Fall von vier Segmenten, aufteilt ist. Jedes Endsegment 37x bis 374 ist jeweils um seine eigene Längsmittelachse um 90° tordiert , alternativ kann ein anderer Torsionswinkel größer 0° und kleiner 90° gewählt werden. Im Fall der rechtwinkligen Tordierung verlaufen die Endsegmente 37x bis 37. an ihrer Stirnseite parallel zur Blockhochrichtung, d.h. zur Längsrichtung der zugehörigen Sammelrohre 381; 3"82, 383, 384, die mit entsprechenden Längsschlitzen versehen sind, in welche die Endsegmente 37x bis 374 eingefügt sind. Auf diese Weise ist das Flachrohr 2c strömungsuechnisch in eine entsprechende Anzahl n von Flachrohrsträngen 2l t 22, 23, 24 aufgeteilt, die jeweils zu einer der in Blocktiefenrichtung hintereinanderliegenden Blockeinheiten gehörigen und eine zugehörige Untergruppe aller strömungskanalbildenden Kammern des Flachrohres 2c beinhalten. Während im Beispiel von Fig. 7 das Flachrohr 2c in gleich breite Teilstränge 2X bis 24 unterteilt ist, kann alternativ eine Aufteilung in unterschiedlich breite Teilstränge vorgesehen sein. Im Beispiel von Fig. 7 verbleibt zwischen zwei benachbarten Flachrohrteilen je ein offener Strömungskanal 39, indem dieser endseitig von den entsprechend breit gewählten Sägeschnitten 36!, 362, 363 gekürzt wird und dadurch nicht als fluidführender, in die Sammelrohre mündender Kanal fungiert. Wenn alternativ die Sägeschnitte als schmale Schnitte zwischen benachbarten Kanälen eingebracht werden, können bei Bedarf alle Kammern des Flachrohrs 2c als fluid- führende Strömungskanäle fungieren. Das Mehrkammer-Flachrohr 2c ist vorzugsweise als extrudiertes Profil mit hinsichtlich geringem innerem Volumen und hoher Druckstabilität optimierten Kanälen gefertigt . Zur Erzielung eines geringen inneren Volumens und einer hohen Druckstabili tät des Rohr- /Rippenblocks insgesamt trägt , wie erwähnt , zusätzlich bei , daß besonders bei Flachrchren mit tordierten Enden für den Rohrblock Ξammelrohre miff. relativ geringem Innendurchmesser verwendet werden können . Außerdem läßt sich j e nach Positionierung der direkten ' Sammelkanalverbindungen zwi schen den Sammelrohren und/oder der Quertrennwände in den Sammelrohren eine sehr variable Strömungsführung für das hindurchgeleitete Temperiermedium erzielen .As indicated in FIG. 4, the flat tube units 2 of the tube / fin block from FIG. 1 can consist of flat tubes 2a, 2b lying next to one another in the block depth direction, for each block unit 1, ie in this case each block unit 1 consists of a stack of individual flat tubes, whose width corresponds essentially to the depth of the respective block unit. Alternatively, a wider type of flat tube can be ner manner can be used, as is schematically and partially illustrated in Fig. 7. The multi-chamber flat tube 2c shown there has a width T which essentially corresponds to the total tube block depth, ie the sum of the depths of the individual block units. The flat tube 2c is in both end regions, of which in., Fig. 7 is shown, provided with a predeterminable number n of longitudinal saw cuts 36- L , 36 2 , 36 3 , ie n = 3 cuts in this example, as a result of which the end region is divided into a number n + 1 of end segments 37 x to 37 4 , ie divided into four segments in the case shown. Each end segment 37 x to 37 4 is twisted by 90 ° about its own longitudinal central axis, alternatively a different torsion angle greater than 0 ° and less than 90 ° can be selected. In the case of right-angled twisting, the end segments 37 x to 37. run on their end faces parallel to the vertical direction of the block, ie to the longitudinal direction of the associated header pipes 38 1; 3 " 8 2 , 38 3 , 38 4 , which are provided with corresponding longitudinal slots, into which the end segments 37 x to 37 4 are inserted. In this way, the flat tube 2c is flow-technically into a corresponding number n of flat tube strands 2 according to 2 2 , 2 3 , 2 4 which each belong to one of the block units one behind the other in the block depth direction and contain an associated subgroup of all flow channel-forming chambers of the flat tube 2c, while in the example of Fig. 7 the flat tube 2c is divided into partial strands 2 X to 2 4 of the same width , may alternatively be a division be provided in different widths partial strands. in the example of Fig. 7 remains between two adjacent flat tube parts per an open flow channel 39 by being the end of the corresponding wide chosen saw cuts 36!, 36 2, 36 3 reduced and thereby does not act as a fluid-carrying channel that opens into the collecting pipes If saw cuts are made as narrow cuts between adjacent channels, all chambers of the flat tube 2c can function as fluid-conducting flow channels if required. The multi-chamber flat tube 2c is preferably manufactured as an extruded profile with channels optimized with regard to a small internal volume and high pressure stability. To achieve a low internal volume and a high pressure stability of the tube / fin block overall, as mentioned, additionally contributes to the fact that bei collecting tubes especially for flat tubes with twisted ends for the tube block. relatively small inner diameter can be used. In addition, depending on the positioning of the direct ' collecting duct connections between the collecting pipes and / or the transverse partition walls in the collecting pipes, a very variable flow guidance for the temperature control medium passed through can be achieved.
Zur Bildung der Wellrippenstruktur 6 des Rohr-/Rippenblocks können pro Rippenschicht eine sich über die gesamte Blocktiefe erstreckende Wellrippe oder mehrere schmälere Wellrippen gleicher oder unterschiedlicher- . Breite nebeneinanderliegend eingebracht sein . So können beispielsweise eine breite , sich über drei Blockeinheiten erstreckende Wellrippe und eine schmale , auf die vierte Blockeinheit beschränkte Wellrippe oder abwechselnd j e eine schmalere und eine breitere Wellrippe vorgesehen sein . Die verschiedenen Möglichkeiten der Einbringung der Wellrippen 6 sind unabhängig davon , ob für den Rohrblock das breite Flachrohr 2c von Fig . 7 oder eine Mehrzahl von in Blocktiefenrichtung nebeneinanderliegender Flachrohre vorgesehen sind .In order to form the corrugated fin structure 6 of the tube / fin block, one corrugated fin extending over the entire block depth or several narrower corrugated fins of the same or different can be used for each fin layer. Width must be placed side by side. For example, a wide corrugated fin extending over three block units and a narrow corrugated fin limited to the fourth block unit or alternately a narrower and a wider corrugated fin can be provided. The various possibilities for introducing the corrugated fins 6 are independent of whether the wide flat tube 2c of FIG. 7 or a plurality of flat tubes lying side by side in the block depth direction are provided.
Der erfindungsgemäße Rohrblock eignet sich u . a . besonders gut für Verdampfer von mit dem Kältemittel C02 arbeitenden Kraft fahrzeug-Klimaanlagen, indem er ausreichend druckstabil ist und ein vergleichsweise geringes inneres Volumen besitzt , wobei neben den schon erwähnten weitere Realisierungen möglich sind . So können z . B . Sammelrohre ohne Quertrennwände vorgesehen sein, d . h . alle Rohreinheiten einer 3lockeinheit werden parallel durchströmt . Die Sammelkanalverbindungen sind in diesem Fall abwechselnd auf der einen und der anderen Sammelkanal -Rohrblockseite angeordnet . Als weitere Variante kön- nen die Sammelkanalverbindungen durch Umlenkrohre gebildet sein , welche das durchströmende Medium von Rohreinheiten einer Blockeinheit in die Rohreinheiten mindestens einer benachbarten Blockeinheit umlenken . Dazu münden dann diese Rohreinheiten der beteiligten Blockeinheiten in einen gemeinsamen, von dem Umlenkrohr gebildeten Uralenkraum, der somit die verbundenen Sammelkanäle dieser Blockeihheiten integriert umfaßt . The pipe block according to the invention is u. a. Particularly good for evaporators of automotive air conditioning systems working with the refrigerant C0 2 , in that it is sufficiently pressure-stable and has a comparatively small internal volume, whereby besides the already mentioned further realizations are possible. So z. B. Collecting pipes without cross dividers may be provided, d. H . all pipe units of a 3lock unit are flowed through in parallel. In this case, the manifold connections are alternately arranged on one and the other manifold tube block side. As a further variant NEN the collecting channel connections are formed by deflecting tubes, which deflect the medium flowing through from tube units of a block unit into the tube units of at least one adjacent block unit. For this purpose, these tube units of the block units involved then open into a common uranium steering space formed by the deflection tube, which thus integrally comprises the connected collecting channels of these block units.

Claims

Patentansprüche claims
1. Wärmeübertrager-Rohrblock, mit mehreren, in Blocktiefenrichtung hintereinanderliegenden Blockeinheiten (1) , die jeweils mehrere, in Blockhochrichtung aufeinanderfolgende Wärmeübertrager-Rohireinheiten (2) mit in Blockquerrichtung verlaufenden Rohrströmungskanälen und zugehörige, seitlich angeordnete, in Blockhochrichtung verlaufende Sammelkanäle (8a bis 11b) beinhalten, dadurch gekennzeichnet, daß zwischen wenigstens zwei benachbarten Blockeinheiten (1) wenigstens eine Sammelkanalverbindung (13a, 13b, 13c) vorgesehen ist, welche einen Sammelkanal der einen Blockeinheit direkt mit einem Sammelkanal der anderen Blockeinheit verbindet.1. heat exchanger tube block, with a plurality of block units (1) lying one behind the other in the block depth direction, each having a plurality of heat exchanger tube units (2) which follow one another in the block vertical direction with pipe flow channels running in the transverse direction of the block and associated collecting channels (8a to 11b) arranged laterally and running in the block vertical direction include, characterized in that between at least two adjacent block units (1) at least one collecting channel connection (13a, 13b, 13c) is provided, which connects a collecting channel of one block unit directly to a collecting channel of the other block unit.
2. Wärmeübertrager-Rohrblock nach Anspruch 1, weiter dadurch gekennzeichnet, daß wenigstens je eine Sammelkanalverbindung2. Heat exchanger tube block according to claim 1, further characterized in that at least one collecting duct connection
(13a, 13b, 13c) zwischen jedem Paar benachbarter Blockeinheiten (1) dergestalt vorgesehen ist, daß ein die Blockeinheiten seriell fluidverbindender Strömungspfad gebildet ist.(13a, 13b, 13c) is provided between each pair of adjacent block units (1) in such a way that a flow path serially connecting the block units is formed.
3. Wärmeübertrager-Rohrblock nach Anspruch 1 oder 2, weiter dadurch gekennzeichnet, daß wenigstens an einer Seite der Blockeinheiten (1) ein mehrteiliger Sammelraum vorgesehen ist, der mehrere, durch eine jeweilige Quertrennwand (7a bis 7d) voneinander getrennte Sammelkanäle (8a bis 11b) beinhaltet.3. Heat exchanger tube block according to claim 1 or 2, further characterized in that at least on one side of the block units (1) a multi-part collecting space is provided which has a plurality of collecting channels (8a to 11b) separated from one another by a respective transverse partition (7a to 7d) ) includes.
4. Wärmeübertrager-Rohrblock nach einem der Ansprüche 1 bis 3, weiter dadurch gekennzeichnet, daß der oder die Sammelkanäle (8a bis 11b, 12) einer jeden Blockeinheit (1) auf wenigstens einer Blockseite von einzelnen Sammelrohren (4a bis 4d, 5a) gebildet sind, die über wenigstens ein angeformtes oder angebrachtes Distanzelement (16a, 16b, 16c) voneinander beabstandet sind. 4. Heat exchanger tube block according to one of claims 1 to 3, further characterized in that the collecting channel or channels (8a to 11b, 12) of each block unit (1) on at least one block side of individual collecting tubes (4a to 4d, 5a) which are spaced apart from one another by at least one integrally formed or attached spacer element (16a, 16b, 16c).
5. Wärmeübertrager-Rohrblock nach Anspruch 4 , weiter dadurch gekennzeichnet, daß das Distanzelement ein umgeformtes Blechstüc.k (20) oder Rohrstück (17) mit wenigstens einer Schlitzöffnung zur Bereitstellung der jeweiligen Sammelkanalverbindung beinhaltet.5. Heat exchanger tube block according to claim 4, further characterized in that the spacer includes a formed Blechstüc.k (20) or pipe section (17) with at least one slot opening to provide the respective collecting duct connection.
6. Wärmeübertrager-Rohrblock nach Anspruch 4, weiter dadurch gekennzeichnet, daß das Distanzelement einen nach außen auf- gebauchten Durchlaß (28, 29, 34, 35) an einem oder beiden verbundenen Sammelrohren (26, 27, 32, 33) beinhaltet, der Teil der Sammelkanalverbindung zwischen den beiden Sammelrohren ist.6. Heat exchanger tube block according to claim 4, further characterized in that the spacer includes an outwardly bulged passage (28, 29, 34, 35) on one or both connected manifolds (26, 27, 32, 33), the Part of the manifold connection between the two manifolds.
7. Wärmeübertrager-Rohrblock nach Anspruch 6, weiter dadurch gekennzeichnet, daß das Distanzelement aus zwei fluiddicht aneinanderstoßenden oder ineinandergreifenden, die Sammelkanalverbindung bildenden Durchlässen (28, 29, 34, 35) besteht, von denen wenigstens einer nach außen ausgebaucht ist .7. Heat exchanger tube block according to claim 6, further characterized in that the spacer consists of two fluid-tight abutting or interlocking passages (28, 29, 34, 35) forming the collecting channel connection, at least one of which bulges outwards.
8. Wärmeübertrager-Rohrblock nach einem der Ansprüche 1 bis8. Heat exchanger tube block according to one of claims 1 to
7, weiter dadurch gekennzeichnet, daß die Wärmeübertrager- Rohreinheiten von geradlinigen Flachrohrsträngen (2) gebildet sind, die mit tordierten Rohrenden (3a, 3b) in korrespondierende, zur 31ocktiefenrichtung senkrechte oder geneigte Schlitze sammelkanalbildender Sammelrohre (4a, 5a) eingefügt sind.7, further characterized in that the heat exchanger tube units are formed by rectilinear flat tube strands (2) which are inserted with twisted tube ends (3a, 3b) into corresponding slots (4a, 5a) forming manifold-forming tubes, forming channels that form perpendicular or inclined to the 31ock depth direction.
9. Wärmeübertrager-Rohrblock nach einem der Ansprüche 1 bis9. Heat exchanger tube block according to one of claims 1 to
8, weiter dadurch gekennzeichnet, daß zwischen den Wärmeübertrager-Rohreinheiten (2) wärmeleitfähige Wellrippen (6) eingebracht sind, wobei in Blocktief nrichtung eine sich über die gesamte Blocktiefe erstreckende Wellrippe oder mehrere nebeneinanderliegende Wellrippen gleicher oder unterschiedlicher Breite und gleicher oder unterschiedlicher Rippendichte vorgesehen sind. 8, further characterized in that thermally conductive corrugated fins (6) are introduced between the heat exchanger tube units (2), a corrugated fin extending over the entire block depth or several adjacent corrugated fins of the same or different width and the same or different fin density being provided in the block depth direction .
10 . Wärmeübertrager-Rohrblock nach einem der Ansprüche 1 bis ■ 9 , weiter dadurch gekennzeichnet , daß wenigstens zwei in Blocktiefenrichtung nebeneinanderliegende Wärmeübertrager- Rohreinheiten hintereinanderliegender Blockeinheiten von integralen Teilen gleicher oder unterschiedlicher Breite eines sich in Blocktiefenrichtung über mehrere Blockeinheiten erstreckenden Mehrkammer- Flachrohres gebildet sind .10th Heat exchanger tube block according to one of claims 1 to ■ 9, further characterized in that at least two juxtaposed in block depth direction Wärmeübertrager- tube units one behind the other block units of integral parts of the same or different width a extending in the block depth direction over a plurality of block units multi-chamber flat tube are formed.
11 . Mehrkammer-Flachrohr für einen Wärmeübertrager-Rohrblock , insbesondere einen Wärmeübertrager-Rohrblock nach Anspruch 10 , dadurch gekennzeichnet , daß es endseitig mittels eines oder mehreren Längsschlitzen (361 ; 362 , 363 ) in eine Mehrzahl von separaten Ξndsegmenten ( 37x bis 374 ) unterteilt ist , die um j e eine eigene Längsachse tor- diert sind . 11. Multi-chamber flat tube for a heat exchanger tube block, in particular a heat exchanger tube block according to claim 10, characterized in that it ends at one end by means of one or more longitudinal slots (36 1; 36 2 , 36 3 ) into a plurality of separate end segments (37 x to 37 4 ) is subdivided, each twisted around its own longitudinal axis.
EP99945950A 1998-07-28 1999-07-09 Heat exchanger tubular block and a multi-chamber flat tube which can be used therefor Expired - Lifetime EP1042641B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19833845 1998-07-28
DE19833845A DE19833845A1 (en) 1998-07-28 1998-07-28 Heat exchanger tube block and multi-chamber flat tube that can be used for this
PCT/DE1999/002128 WO2000006964A1 (en) 1998-07-28 1999-07-09 Heat exchanger tubular block and a multi-chamber flat tube which can be used therefor

Publications (2)

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EP1042641A1 true EP1042641A1 (en) 2000-10-11
EP1042641B1 EP1042641B1 (en) 2003-09-10

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US (1) US6523606B1 (en)
EP (1) EP1042641B1 (en)
JP (1) JP2002521644A (en)
AU (1) AU5849499A (en)
DE (1) DE19833845A1 (en)
WO (1) WO2000006964A1 (en)

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Also Published As

Publication number Publication date
JP2002521644A (en) 2002-07-16
AU5849499A (en) 2000-02-21
DE19833845A1 (en) 2000-02-03
EP1042641B1 (en) 2003-09-10
US6523606B1 (en) 2003-02-25
WO2000006964A1 (en) 2000-02-10

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