EP1926961B1 - Heat exchanger, in particular gas cooler - Google Patents

Description

The invention relates to a heat exchanger, in particular a gas cooler, as used for example for the air conditioning of a motor vehicle, according to the preamble of claim 1.

From the DE 10 2004 037 688 A1 a device for the exchange of heat is known, as used for example for air conditioning systems of motor vehicles. This device has at least one collecting and / or distributing device and at least one throughflow device, preferably a plurality of throughflow devices, wherein the collecting and / or distributing device has at least two flow paths and by at least two molded parts and possibly also at least one or two limiting elements, like partitions, has. The shaped parts form the flow paths for a liquid and / or gaseous fluid, for example a refrigerant. The moldings touch each other in at least three sections, in particular in continuous areas, flat. The moldings have recesses for the at least partially receiving the flow devices, in particular formed by flat tubes on. Furthermore, the flow paths formed by the moldings preferably have a shape that in Is substantially circular, drip, polygonal, elliptical or has hybrids thereof. Such a heat exchanger still leaves something to be desired, in particular with regard to the inlet and outlet of the medium flowing therein, in particular of a refrigerant.

The EP 1 439 367 A1 shows a heat exchanger with two manifolds, which consist of a bottom and a lid, wherein the cover has a flange is attached. The lid has a U-shaped configuration, the cross-section being constant over substantially the entire header length. The connection flange has a contact surface corresponding to the cover, with which it is soldered to the cover. In addition to the contact surface as a further (main) contact surface, a collar is provided, which adjoins a paragraph on a projecting into the manifold spigot, and rests on the manifold outside, wherein the two contact surfaces are formed separately.

From the DE 195 09 788 A1 is known a double-tube heat exchanger and a method for its production. Here, on the outer circumference of the heat exchanger formed by two coaxial tubes, which thereby has a cylindrical outer circumference, provided connections, which are attached by means of soldering (Nocolok method), wherein the soldering takes place in one operation. These connections have a contour which corresponds to the outer contour of the heat exchanger, ie the connection surface is simply curved with a constant radius in the longitudinal direction of the heat exchanger.

A generic heat exchanger with the features of the preamble of claim 1 is known from DE 199 06 289 A1 known.

All of the previously described, conventional heat exchangers leave nothing to be desired, including with regard to (pre) assembly and handling before soldering.

It is an object of the invention to provide an improved heat exchanger available. This object is achieved by a heat exchanger with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

According to the invention, a heat exchanger is provided, in particular a gas cooler, comprising at least one collecting and / or distribution device and at least one flow device, preferably a plurality of flow devices, in particular formed by flat tubes, wherein the collecting and / or distribution device preferably at least two flow paths for a fluid and preferably is formed by at least two mold parts, wherein in at least one of the mold parts at least one inlet or outlet opening provided for the fluid and the mold part with the inlet or outlet opening for the fluid at least one connection is attached, the surface on the outside of the Molded part fits snugly, in particular soldered, wherein the shape of the contact surface of the terminal is adapted to the shape of the outside of the molded part, which is at least partially curved in the region of the contact surface. This is done - except the provision of the opening for the inlet or outlet of the fluid, a deburring thereof and possibly a fine machining the outside for a smooth contact surface in the contact area to the corresponding surface of the connection - no machining of the outside of the molding. Depending on the application, the two flow paths can be in any way (in regions) in communication with each other and / or formed separately from each other. Due to the special shapes, which are matched to each other, the connection can be positioned exactly - possibly even without positioning aids.

According to the invention, a prefixing can also take place by means of one or more riveted joints, for which purpose the connection and the molding must be formed adjacent one another, at least in regions, so that one pressure-tight connection can be realized. If a seal is provided, one or more rivet connections can, in principle, also be sufficient on their own, so that a subsequent soldering process can be dispensed with.

The flow devices are preferably arranged in one or two planes, but they may also be arranged in more than two planes. Furthermore, in addition to more than two flow paths, more than two flow paths can be arranged next to one another and / or a plurality of flow paths can be arranged one behind the other.

In particular with regard to the structure, in particular with regard to the collecting and / or distribution devices and the arrangement of the flat tubes between them, and the production of the heat exchanger is the disclosure of DE 10 2004 037 688A1 explicitly included.

A molded part forms a bottom, in which passage openings for the flow device (s) are provided, and the other molded part a lid, in which the at least one inlet or outlet opening is provided for the fluid.

At least partially, a double curvature of the abutment surface is provided at the terminal, with one axis of curvature in the direction of the longitudinal extent of the mold parts and the other axis of curvature in the width direction of the flow devices, i. in the direction of the width of the flat tubes, runs.

Preferably, at least in regions, a simple curvature of the contact surface is provided on the connection, which simplifies the production of the connection. In this case, the direction of the width of the flow-through devices, at least in their end regions, which are accommodated in the molded part, preferably runs in the direction of the longitudinal extension of the molded parts.

The cross section of the molding with the inlet or outlet opening for the fluid is in this case preferably in the longitudinal direction of the molding at least in the region of the contact surface of the terminal, but preferably over a substantial portion of the molding, apart from the recess for the inlet or outlet opening for the fluid and possibly formed in the molding channels for the flow of the devices supplied or coming from the same fluid or the transfer of the fluid from a flow path to an adjacent flow path, constant.

Preferably, at least the molded part which has the inlet or outlet opening for the fluid, but preferably both mold parts, is formed over a substantial part of its longitudinal extension in a w or omega-shaped cross-section. In this case, the cross section preferably changes over the length of the molded part in the intermediate region.

The connection is preferably soldered. In this case, elements, such as, in particular, projections, tabs or the like, may be provided on at least one of the molded parts for prefixing the components to each other before soldering.

The connection can engage behind at least one of the molded parts, but in particular both molded parts, in particular laterally, so that the connection can additionally serve for prefixing before soldering.

Between two adjacent flow paths of the collecting and / or distribution device for a fluid, a web is preferably provided, formed by the bottom and the cover, in which the shaped parts abut one another over a wide area.

In the collecting and / or distribution device is preferably arranged at least one limiting element which deflects the fluid. This limiting element is preferably soldered in one operation with the entire heat exchanger.

The connection can be designed such that the same component can be provided for the inlet and the discharge of the fluid, so that the number of parts can be reduced and construction errors can be avoided.

Likewise, especially at different connections for the inlet and outlet of the fluid - projections o.ä. be provided, which prevent a wrong assembly sure. For this purpose, in particular a projecting through a slot from the terminal over the contact surface projecting projection in conjunction with the position of the slot the corresponding Aids for preventing a wrong assembly or at least forming a part thereof.

The heat exchanger is preferably made of aluminum, an aluminum alloy, iron, an iron alloy, copper or a copper alloy, wherein the heat exchanger is preferably soldered.

For the production of a heat exchanger according to the invention, a connection to an outer surface of the collecting and / or distribution device is adapted or designed accordingly, the connection is positioned on the outer surface, prefixed and then soldered. In this case - except the provision of the openings for the inlet or outlet of the fluid - no significant machining of the outer surface of the collecting and / or distribution device, only the connection is adapted in the region of the contact surface to the outer surface of the collecting and / or distribution device , It is also possible, in particular to manufacture the connection by means of an extrusion process with subsequent post-processing steps.

The prefixing of the connection on the molded part takes place by means of at least one projection, which is provided on one of the molded parts.

It is advantageous that a connection to an outer surface of the collecting and / or distribution device is adapted or designed accordingly, the connection is positioned on the outer surface and prefixed and then soldered.

Fig. 1

eine perspektivische Ansicht eines Wärmeübertragers gemäß dem ersten Ausführungsbeispiel, wobei nur im unteren Bereich die Wellrippen dargestellt sind,

Fig. 2

eine Detailansicht des Bereichs A von Fig. 1,

Fig. 3

eine Ansicht der Schmalseite des Wärmeübertragers von Fig. 1.

Fig. 4

eine Detailansicht des mit einem Kreis gekennzeichneten Bereichs von Fig. 3,

Fig. 5

einen vergrößert und ausschnittsweise dargestellten Schnitt entlang Linie D-D in Fig. 3,

Fig. 6

eine Seitenansicht des Wärmeübertragers von Fig. 1, wobei wiederum nur im unteren Bereich die Wellrippen dargestellt sind,

Fig. 7

einen vergrößert und ausschnittsweise dargestellten Schnitt entlang Linie B-B in Fig. 6,

Fig. 8

eine perspektivische Detailansicht eines Wärmeübertragers mit Darstellung eines Anschlussrohres,

Fig. 9

eine perspektivische Ansicht des Bodens mit Anschluss gemäß einer nicht erfindungsgemäßen Variante.

Fig. 10

eine perspektivische Innenansicht des Bodens von Fig. 9,

Fig. 11

eine Innenansicht des Bodens von Fig. 9,

Fig. 12

eine perspektivische Detailansicht eines Wärmeübertragers ohne Darstellung der Flachrohre,

Fig. 13

eine andere perspektivische Detailansicht des Wärmeübertragers von Fig. 12,

Fig. 14

eine Seitenansicht des Wärmeübertragers von Fig. 12,

Fig. 15

einen Schnitt entlang Linie E-E in Fig. 14,

Fig. 16

eine perspektivische Detailansicht eines Wärmeübertragers, einem weiteren Ausführungsbeispiel.

Fig. 17

eine perspektivische Ansicht eines Wärmeübertragerseinem weiteren Ausführungsbeispiel wobei nur im unteren Bereich die Wellrippen dargestellt sind,

Fig. 18

eine Detailansicht des Bereichs A von Fig. 17,

Fig. 19

eine Detailansicht des Bereichs B von Fig. 17,

Fig. 20

eine Ansicht der Schmalseite des Wärmeübertragers von Fig. 17.

Fig. 21

einen vergrößert dargestellten Schnitt entlang Linie D-D in Fig. 20,

Fig. 22

eine Seitenansicht des Wärmeübertragers von Fig. 17, wobei nur im unteren Bereich die Wellrippen dargestellt sind,

Fig. 23

einen vergrößert dargestellten Schnitt entlang Linie C-C in Fig. 22,

Fig. 24

eine Variante des vorigen Ausführungsbeispiels,

Fig. 25

eine perspektivische Ansicht eines Wärmeübertragers gemäß einer anderen Variante,

Fig. 26

eine andere perspektivische Ansicht eines Wärmeübertragers von Fig. 25 ohne Darstellung der Flachrohre,

Fig. 27

eine perspektivische Detailansicht eines Wärmeübertragers,

Fig. 28

einen Ausschnitt einer Draufsicht auf eine Sammel- und/oder Verteilungseinrichtung eines Wärmeübertragers,

Fig. 29

einen Schnitt entlang der Linie B-B von Fig. 28,

Fig. 30

einen Ausschnitt einer Draufsicht auf eine Sammel- und/oder Verteilungseinrichtung eines Wärmeübertragers,

Fig. 31

einen Schnitt entlang der Linie B-B von Fig. 30,

Fig. 32

eine perspektivische Ansicht des Ausschnitts von Fig. 30,

Fig. 33

eine perspektivische Ansicht eines Ausschnitts einer Sammel- und/oder Verteilungseinrichtung eines Wärmeübertragers,

Fig. 34

eine perspektivische Ansicht eines Ausschnitts einer Sammel- und/oder Verteilungseinrichtung eines Wärmeübertragers,

Fig. 35

einen Schnitt in Längsrichtung durch die Sammel- und/oder Verteilungseinrichtung von Fig. 34,

Fig. 36

einen Ausschnitt einer Draufsicht auf eine Sammel- und/oder Verteilungseinrichtung eines Wärmeübertragers, und

Fig. 37

einen Schnitt in Längsrichtung von Fig. 36.

In the following the invention with reference to several embodiments, partially with variants and partly with reference to the drawings, explained in detail. Show it:

Fig. 1

a perspective view of a heat exchanger according to the first embodiment, wherein only in the lower region of the corrugated fins are shown,

Fig. 2

a detailed view of the area A of Fig. 1 .

Fig. 3

a view of the narrow side of the heat exchanger of Fig. 1 ,

Fig. 4

a detail view of the marked with a circle area of Fig. 3 .

Fig. 5

an enlarged and fragmentary section along line DD in Fig. 3 .

Fig. 6

a side view of the heat exchanger of Fig. 1 , again showing the corrugated ribs only in the lower area,

Fig. 7

an enlarged and fragmentary section along line BB in Fig. 6 .

Fig. 8

a detailed perspective view of a heat exchanger with representation of a connecting pipe,

Fig. 9

a perspective view of the bottom with connection according to a variant not according to the invention.

Fig. 10

an interior perspective view of the bottom of Fig. 9 .

Fig. 11

an inside view of the floor of Fig. 9 .

Fig. 12

a detailed perspective view of a heat exchanger without representation of the flat tubes,

Fig. 13

another perspective detail view of the heat exchanger of Fig. 12 .

Fig. 14

a side view of the heat exchanger of Fig. 12 .

Fig. 15

a section along line EE in Fig. 14 .

Fig. 16

a detailed perspective view of a heat exchanger, a further embodiment.

Fig. 17

a perspective view of a Wärmeübertragerseinem another embodiment with only the bottom of the corrugated fins are shown,

Fig. 18

a detailed view of the area A of Fig. 17 .

Fig. 19

a detailed view of the area B of Fig. 17 .

Fig. 20

a view of the narrow side of the heat exchanger of Fig. 17 ,

Fig. 21

an enlarged section along line DD in Fig. 20 .

Fig. 22

a side view of the heat exchanger of Fig. 17 , where only in the lower part of the corrugated ribs are shown,

Fig. 23

an enlarged section along line CC in Fig. 22 .

Fig. 24

a variant of the previous embodiment,

Fig. 25

a perspective view of a heat exchanger according to another variant,

Fig. 26

another perspective view of a heat exchanger of Fig. 25 without representation of the flat tubes,

Fig. 27

a detailed perspective view of a heat exchanger,

Fig. 28

a detail of a plan view of a collecting and / or distribution device of a heat exchanger,

Fig. 29

a section along the line BB of Fig. 28 .

Fig. 30

a detail of a plan view of a collecting and / or distribution device of a heat exchanger,

Fig. 31

a section along the line BB of Fig. 30 .

Fig. 32

a perspective view of the section of Fig. 30 .

Fig. 33

a perspective view of a section of a collecting and / or distribution device of a heat exchanger,

Fig. 34

a perspective view of a section of a collecting and / or distribution device of a heat exchanger,

Fig. 35

a longitudinal section through the collecting and / or distribution device of Fig. 34 .

Fig. 36

a detail of a plan view of a collecting and / or distribution device of a heat exchanger, and

Fig. 37

a section in the longitudinal direction of Fig. 36 ,

A single-row heat exchanger, in this case a gas cooler 1, in which a refrigerant flows, in the present case R744, has a plurality of flat tubes 2 arranged side by side in a row with corrugated fins 3 arranged therebetween. The flat tubes 2, in this case formed by Mehrkammerflachrohre are introduced with their ends in receptacles which are provided in each one end of the flat tubes 2 arranged collecting and / or distribution device 4 and adapted in shape to the outer contour of the flat tubes 2.

In the present case, the collecting and / or distributing device 4 is formed by two molded parts 5 produced by punching and forming from a metal sheet, wherein the first molded part has a base 6 in which the receptacles for the flat tubes 2 are provided, and the second molded part has a cover 7 forms, in each of which an opening 8 is provided for the inlet and the outlet of the refrigerant. The bottom 6 in this case surrounds the lid 7 side. Due to the design of the lid 7 with crossing areas 15 or channels, formed by corresponding transformations of the lid 7 (see Fig. 5 ), in the region of the flat tube ends an undisturbed inflow and outflow of the refrigerant in both by the collecting and / or distribution device 4 formed flow paths and possibly also a flow compensation between the two flow paths is possible.

For deflecting the refrigerant in the interior of the gas cooler 1, at least one partition wall (not shown) is additionally provided, so that the refrigerant is conducted through the gas cooler 1 in a known manner. If only one partition wall is provided, then only a diversion of the refrigerant flow, i. Flat tubes 2 of the one part of the gas cooler 1 are flowed through in one direction and the flat tubes 2 of the other part of the gas cooler 1 are flowed through in the opposite direction. However, any other flow paths are possible. Likewise, the gas cooler can be formed in several rows in depth.

The bottom 6 and the cover 7 are in three areas in a flat, namely in the middle and along the edges, so that two flow paths are formed for the refrigerant, which extend in the longitudinal direction of the moldings 5. In the area of the crossing areas 15, of course, there is no contact between the floor 6 and the cover 7.

At the edges of the bottom 6, a plurality of projections 9 or tabs are each formed in pairs at the same height, which is a prefixing allow the bottom 6 relative to the lid 7 during pre-assembly before soldering. It is also conceivable that the projections 9 protrude through slots which are provided in the lid 7, and engage around the edge region of the lid 7 in extension of the slots.

In the area of the openings 8 for the inlet and outlet of the refrigerant, a connection 10 with a passage opening 11 is provided on the outside of the lid 7, which is aligned with the corresponding opening 8 of the lid 7. The terminal 10 is provided as a kind of flange for reinforcement and / or receiving a connection pipe.

The passage opening 11 is, as in the Figures 5 and 7 shown in detail, stepped as a stepped bore, so that a connection pipe 12, as in Fig. 8 shown inserted into the terminal 10 to a defined stop and can be soldered to the same or otherwise connected firmly. In this case, the connecting pipe 12 preferably has an outer diameter which essentially corresponds to the larger inner diameter of the connection 10, and an inner diameter which substantially corresponds to the smaller inner diameter of the connection 10.

The terminal 10 is formed laterally in the direction of the longitudinal extent of the mold parts 5 perpendicular and bevelled on the other sides (see. Figures 5 and 7 ). On the outside, that is, the side spaced from the gas cooler 1 side, it ends in a plane - apart from the passage opening 11. On the inside, ie the voltage applied to the gas cooler 1 side, he has transversely to the longitudinal extension of the mold parts 5 one of the contour of the lid. 7 corresponding course (see Fig. 7 ), for which he has two curved and an interposed flat surface. In the direction perpendicular thereto, ie in the direction of the longitudinal extent of the moldings 5, it has a shape corresponding to the course of the cover 7 adapted shape, ie it is in in the present embodiment shown in the side areas and the center flat and curved in the intermediate areas.

On the lateral outer sides of the terminal 10 recesses for the projections 9 are provided in the oblique region, so that the connection before soldering to the bottom 6 and thus also on the lid 7 can be prefixed.

The terminal 10 is arranged centrally above the end of a first flat tube 2 according to the first embodiment (see Fig. 5 ), wherein it ends in the direction of the longitudinal extent of the mold parts 5 in each case in front of the ribs of the lid 7, which are provided on the basis of the channels for the two adjacent to the first flat tube 2 arranged flat tubes 2 in or out flowing refrigerant. As a result of the central arrangement, the pressure loss can be kept low.

For the production of the gas cooler 1, the cover 7 is placed on the bottom 6 and the terminals 10 on the lid 7 after positioning the partition wall in the bottom 6 and then bent over the projections 6 formed on the bottom 6, so that the individual components are prefixed. Thereafter, the flat tubes 2 together with corrugated fins 3 are positioned between the two collection and / or distribution devices 4. Furthermore, the connection tubes 12 are still positioned in the terminals 10. With the provision of a slight interference fit, which prevents falling out, but does not hinder the assembly, no further pre-fixing is required. All parts are solder-plated at least in the connection areas, so that after the pre-assembly and the pre-fixing in one operation, the gas cooler 1 can be soldered.

The connection 10 is produced according to the present exemplary embodiment by means of machining, but production as an extrusion part is also possible.

According to an alternative attachment of the connection pipe in the connection, a sealing element or a sealing geometry can also be integrated into the connection. Furthermore, a device for fixing the connecting pipe can be provided at the connection, for example with a thread and / or threaded bores. In addition, one or more holes may be provided for receiving centering pins in the connection.

Also, for a better soldering with the connecting pipe following a receptacle for a solder ring, a Lotformteil o.ä. be provided.

According to a further variant, the connection extends over a plurality of flat tube widths, so that - in particular with a small tube width and fin height - a sufficient contact and soldering surface is available in order to ensure a secure soldered connection. In addition, several passages may be provided in this case.

Likewise, any desired geometries of the passage opening (s) in the connection as well as corresponding openings in the cover of the collection and / or distribution device are possible.

In the FIGS. 9 to 11 is a variant not according to the invention shown, according to which no projections are provided. Accordingly missing at the connection, the recesses for the projections. In this case, the prefixing of the individual elements vor.dem soldering done in any other way, eg. By means of steel bands or fixtures.

The FIGS. 12 to 15 show a further variant of a single-row gas cooler 1, wherein in the following due to the similarity to the first embodiment, the same components are provided with the same reference numerals.

According to the first embodiment, two mold parts 5 are formed from the bottom 6 and as a lid 7, wherein a prefixing takes place after mounting by means of projections 9 formed laterally on the bottom 6. In contrast to the first embodiment, the terminal 10 'is significantly wider and engages behind the bottom 6, as in particular Fig. 15 is apparent. However, the configuration of the terminal 10 'in the direction of the longitudinal extent of the moldings 5 corresponds to that of the terminal 10 according to the first embodiment, ie, the side walls arranged perpendicular to the direction of the longitudinal extent of the moldings 5 are parallel to each other. Likewise, the geometries of the contact surfaces correspond to each other, wherein according to the second embodiment, the engaging ends 13 of the terminal 10 'after placing and positioning of the terminal 10' on the lid 7, which is pre-fixed to the bottom 6, were bent.

Fig. 16 shows an embodiment, according to which again in the following due to the similarity to the first embodiment, the same components are provided with the same reference numerals.

Significant difference to the first embodiment is that in the connection 10 "at diagonally opposite corners holes are provided through which rivets 14 protrude, so that the terminal 10" with the lid 7, in which corresponding holes are provided, which with the holes in the connection The bottom 6 and the lid 7 are in turn pre-fixed by means of the projections 9. In an embodiment, not shown, the bores for the rivets are located on the Symmetry axis or in the region of the central Verlöturigsfläche of bottom 6 and cover. 7

According to a variant not shown in the drawing eliminates the projections, and the rivets, which are arranged further offset outwardly, protrude through aligned holes in the bottom, cover and possibly in connection.

According to the embodiments described above, a single-row gas cooler is provided in each case, in which the flat tubes are arranged transversely to the longitudinal extent of the collecting and / or distribution devices in the direction of their width, wherein an exchange of refrigerant between the two parallel flow paths of a collection and / or or distribution facility. However, the number of parallel flow paths formed in the collection and / or distribution device may also be greater than two. In particular, in this case, the connection can also extend only over a part of the width of the lid, in particular in the central area. Alternatively, the connection may be formed such that the refrigerant is distributed to a plurality of openings, in particular arranged at a height with respect to the direction of the longitudinal extension of the molded parts, in the lid or is brought together by a plurality of openings. For this purpose, instead of the stepped bore, as provided in the embodiments described above, a groove on the side of the cover may be provided in the connection, which merges into a bore on the other side, in turn, a stepped bore may be provided to a defined stop to form for the connection pipe.

However, the flow paths can also be formed completely separate from each other, as will be explained in more detail below with reference to further embodiments. In this case, no channels are usually provided between the adjacent flow paths, so that the cover may have a longitudinal cross-section which is substantially continuous in the longitudinal direction, as a result of which the shape of the connection socket is generally simplified.

The following is with reference to the FIGS. 17 to 23 Embodiment explained in more detail. Here, the same components are provided with reference numerals higher by 100 than in the first embodiment.

A double-row gas cooler 101 has two collection and / or distribution devices 104, essentially formed by two mold parts 105, namely a bottom 106 and a cover 107, which form between them two separately formed flow paths, with two rows of between each two of the flow paths extending flat tubes 102 and arranged between the flat tubes 102 corrugated fins 103. The flat tubes 102 are rotated in their end regions by 90 °, so that the ends in the direction of the longitudinal extension of the collection and / or distribution devices 104 are received in corresponding openings in the bottoms 106 of the collection and / or distribution devices 104 (see Figures 21 and 23 ), while in the heat transfer region between the corrugated fins 103 shows the narrow side of the flat tubes 102 in the direction of air flow.

For the inlet and the outlet of the refrigerant per an opening in one of the lid 107 is provided, wherein the opening for the introduction is arranged in a different flow path than the opening for the discharge. In this case, the opening for the introduction in the air flow direction seen rear flow path, and the opening for the discharge in the air flow direction seen front flow path is arranged, wherein the two openings are offset (see Fig. 17 ). In the area of the openings, in each case a connection is in surface contact with the outside of the lid 107 110, which extends from one side of the lid 107 to slightly beyond the center of the lid 107 and has a corresponding opening with the corresponding opening 111, which is formed according to the first embodiment described above as a stepped bore to a stop for a connection pipe to build. Due to the staggered arrangement of the terminal 110, the passage opening 111 is not aligned directly with the opening in the lid 107, but is slightly offset towards the center, wherein the passage opening 111 is formed like a blind hole with a laterally offset opening to the opening in the lid 107 out (see Fig. 23 ).

The middle region of the molded parts 105 is web-like with a relatively wide contact surface, wherein a plurality of elongated holes 120 are aligned with each other in both mold parts 105 and extending in the direction of the longitudinal extension of the molded parts 105 (see Fig. 20 ). Here, both terminals 110 are formed such that a projection 121 projects through each of the slots 120 (see Fig. 23 ), so that the terminal 110 is soldered to both mold parts 105. Here, the slots 120 may be slightly wider than the thickness of the projection 121, so that a bracing example. Can be done by caulking, crimping, etc. It is also conceivable that the elongated holes 120 are made slightly narrower than the thickness of the projection 121, so that when inserting the projection into the elongated holes 120 forcibly a bracing takes place.

In principle, a design without slots and without the protruding through the slots projection is possible, however, the projection increases the stability and safety of the solder joint between the cover and port.

The contact surface of the terminal and lid has - in accordance with the contact surfaces of the first embodiments - a partially curved and partially planar course, however, due to the constant in the direction of the longitudinal extent of the mold parts 105 cross-section only a simple curvature and no double curvature, as in the first embodiments, the contact surfaces provided so that the production of the terminal forming member somewhat simplified becomes. Especially in this context, the use of extrusion process is to think.

Again, projections 109 are provided on the bottom 106, which surround the cover 107 and partially also the connection 110 on the outside (see Fig. 23 ) so that they form a prefix. In this case, only one projection 109 is provided for a connection 110.

As a result of the embodiment of the connection described above, the same component can be used on both sides, but also different embodiments of the two ports are possible, especially if the refrigerant supply and discharge lines have different diameters.

According to a variant of the previous embodiment, the in Fig. 24 is shown, four projections 109 are provided for a connection 110 ', which extends over the entire width of the lid 107, but has a laterally staggered passage opening in extension of the connecting pipe 112. Here, in the present case no projection on the connection 110 'is provided, which projects through the central region of the base and lid provided with elongated holes 120, but a projection corresponding to the previous variant can additionally be provided.

According to another variant, in the FIGS. 25 and 26 is shown, a projecting through a slot 120 Projection 121 provided, but again no projections for the prefixing of the bottom, lid and possibly connections are provided.

According to the in Fig. 27 shown further variant rivet connections are provided for the prefixing. In this case, a rivet 114 projects through a bore aligned in the middle region of the molded parts 105 and in the region of the connection 110 "aligned therewith.

According to a sixth, not shown in the drawing variant of the terminal is according to the terminal 10 'with the ends 13 of the second embodiment, the two mold parts engages behind, wherein additionally centrally projecting through the slots projection can be provided.

According to a seventh variant, not shown in the drawing, the connection is designed to extend over substantially the entire width of the cover, wherein one or more rivets are provided in the middle web-like region, which connect the bottom, the cover and the connection to one another.

In the FIGS. 28 and 29 another variant is shown. On the cover 207 (molding) is a passage 222, the opening of which forms the inlet or outlet channel for the refrigerant, is provided, whose outwardly projecting edges are pulled into the terminal 210, whereby the two parts, so the lid and the terminal with each other get connected. Here, in the present case, the wall thickness in the region of the passage 222 is less than in the remaining region of the cover 207, so that a lower obstruction of the inlet and outlet channel is effected and thereby the refrigerant side pressure loss is reduced in the heat exchanger. Also in this case, the terminal 210 is flat on the outside of the lid 207th at, wherein the shape of the contact surface of the terminal 210 is adapted to the shape of the outside of the lid 207, which is at least partially curved in the region of the contact surface to the terminal 210. In addition, the terminal 210 can be held by means of tabs (not shown). Also, solder or adhesive can assist the connection or form the actual fixation of the two parts together.

According to a further variant, which substantially corresponds to the variant described above, the passage 222 is not formed circumferentially but segmented, ie individual strips, in the present four, are drawn into the interior of the terminal 210, as in particular from Fig. 32 seen.

The following variant essentially corresponds to the previously described variant, however, positioning increases 223 are additionally formed on the cover 207, which position the connection 210 in the presently four regions. The elevations are formed by rib-like, outwardly projecting areas in extension of the transverse channels of the collecting and / or distribution device, on which the terminal 210 rests flat above or below.

According to the in the FIGS. 34 and 35 variant shown, instead of a passage, a sleeve 222 'is provided, which essentially fulfills the same function as the passage 222 and projects into the cover 207 to the bottom, but does not affect the transverse flow. In the present case, the sleeve 222 'projects only approximately half the height of the connection 210, comparable to the continuous or segmented passage of the previously described variants. The pre-fixing sleeve 222 'is soldered together with the cover 207 and the terminal 210, for which it is prepared accordingly so that they are in finished soldered state of the heat exchanger additionally stiffens the junction lid connection.

According to the in the FIGS. 36 and 37 illustrated variant, the pre-fixation of the terminal 210 on the lid 207 by gluing, ie, a suitable adhesive is between the terminal 210 and the cover 207, possibly also only in one or more small sub-areas, introduced, which provides sufficient pre-fixing. As part of the subsequent soldering process, the adhesive evaporates or hardens on - depending on the adhesive used - and the connection is securely fixed to the lid. Also in this case, relatively large contact surfaces between the terminal and cover are provided, since the shape of the contact surface of the terminal 210 is adapted to the shape of the outside of the lid 207, which is formed at least partially curved in the region of the contact surface to the terminal 210.

Also can serve as a prefix according to another variant, which is not shown in the drawing, one or more welds or seams, the connection and cover positively lock together, so that in the context of (further) assembly and in the soldering oven slipping of the components to each other.

According to all variants described above, the contact surfaces of the terminals are formed according to the outer contours of the lid and possibly the bottom, so that no further processing of the moldings takes place. Due to the shape of the mold parts, the contact surfaces in the case of the variants described with reference to single-row gas cooler double-curved, in this case by two different, skewed axes, the curvature does not necessarily have to be cylindrical, while the contact surfaces in the case of the reference on the double row Gas cooler described variants are simply curved. In addition to the curvatures are also flat surfaces, possibly also edges, in particular between curved and flat surfaces, provided.

Claims (11)

1. A heat exchanger, in particular a gas cooler, comprising at least one collection and/or distribution device (4; 104) and at least one flow-through device, wherein the collection and/or distribution device (4; 104) preferably comprises at least two flow paths for a fluid and preferably is formed by at least two molded parts (5; 105), wherein at least one inlet or outlet opening (8, 108) for the fluid is provided in at least one of the molded parts (5; 105) and a connection (10; 110), which is planarly seated against the outer side of the molded part (5; 105), is provided on the molded part (5; 105), wherein the shape of the contact surface of the connection (10; 110) is adapted to the shape of the outer side of the molded part (5; 105) which, in the region of the contact surface with the connection (10; 110), has a double curvature at least in some regions, wherein one molded part (5; 105) forms a bottom (6; 106), in which openings for the flow-through device(s) are provided, and the other molded part (5; 105) forms a cover (7; 107) in which the at least one inlet or outlet opening (8; 108) for the fluid is provided, characterized in that at least one protection (9; 109) is provided on one of the molded parts (5; 105), the protection surrounding the edge region of the other molded pars (5; 105) and prefixing the two molded parts (5; 105) against one another, and the protection (9; 109) also surrounds a region of the connection (10; 110) and prefixes the connection (10; 110) to at least one of the molded parts (5; 105).
2. The heat exchanger according to claim 1, characterized in that the cross-section of the molded part (105) having the inlet or outlet opening (108) for the fluid is constant in the longitudinal direction of the molded part (105), at least in the region of the contact surface of the connection (110), apart from the cut-out for the inlet or outlet opening (108) for the fluid and optionally ducts formed in the molded part (105) for the fluid which is supplied to the flow-through devices or coming from the same.
3. The heat exchanger according to claim 2, characterized in that at least the molded part (105) comprising the inlet or outlet opening (108) for the fluid has a w- or ω-shaped cross-section over a substantial part of the longitudinal extension thereof.
4. A heat exchanger according to any one of the preceding claims, characterized in that the connection (10; 110) is soldered on.
5. A heat exchanger according to any one of the preceding claims, characterized in that the connection (10') engages at least one of the molded parts (5), in particular laterally, or at least one of the molded parts engages the connection (10; 110).
6. A heat exchanger according to any one of the preceding claims, characterized in that between two adjoining flow paths of the collection and/or distribution device (104) for a fluid a web, which is formed by the bottom (106) and the cover (107), is provided, in which the molded parts (105) are seated against one another over a wide surface area, wherein at least one opening (120) into which or through which at least one projection (121) of the connection (110) protrudes is provided in the web.
7. A heat exchanger according to any one of the preceding claims, characterized in that the connection (10"; 100") is riveted on.
8. The heat exchanger according to claim 7, characterized in that at least one borehole for a rivet (14; 114), which is aligned with at least one borehole in the collection and/or distribution device (104), is provided in the connection (10"; 110").
9. A heat exchanger according to any one of the preceding claims, characterized in that the connection (110") is attached by riveting, using at least one rivet (114), in the region of a web which is formed between two adjoining flow paths of the collection and/or distribution device (104).
10. A heat exchanger according to any one of the preceding claims, characterized in that at least one delimiting element is arranged in the collection and/or distribution device (4; 104).
11. A heat exchanger according to any one of the preceding claims, characterized in that the flow-through device is formed by a tube, and more particularly a flat tube (2; 102).

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