EP0864840A2 - Heat exchanger for automotive vehicle - Google Patents

Abstract

The heat transfer system, has at least one dividing wall (4) separating at least one collection chamber (1), with an outer contour matching the inner contour of the chamber wall. The dividing wall is soldered in a sealed fit with the inner contour. A holding foot (9), to hold the inserted dividing wall, has two flat facing wall sections (8) of adjacent tube ends (5). The holding foot has at least one one-piece and shaped strap (10), to form an insertion slit for the dividing wall.

Description

The invention relates to a heat exchanger for a motor vehicle with one arranged between two collecting boxes Ribs / tube block, with all tube ends of the ribs / tube block in the area of each collection box expanded and flat against each other then assembled into a tube end package are, and the two collection boxes each flush placed on the assigned tube end package and are tightly soldered to it

Such a heat exchanger is in the unpublished DE 195 43 986.4. With this heat exchanger is a composite of flat tubes and corrugated fins Ribs / tube block provided, the tube ends of the flat tubes are expanded with a rectangular cross-section, that the adjacent pipe ends with their broad sides Wall sections lie flat in a row. The narrow sides of the widened pipe ends Representing wall sections are in one on each side aligned escape so that the pipe ends on the opposite sides of the flat tubes each a compact and form a closely spaced tube end package. A collecting box is placed on each tube end package, the one with the side walls that through the narrow sides the pipe ends formed overlap outside and lies flush against this escape formed by the narrow sides. Since the collection boxes directly the expanded pipe ends overlap and these by the flat abutting in Already a tight connection in the longitudinal direction of each collecting box create, the heat exchanger needs in the area of Collection boxes no additional floor. Both the collection boxes as well as the fins / tube block are made of sheet metal and can be connected to one another in a common soldering process.

The object of the invention is to provide a heat exchanger at the beginning to create a better leadership through the collecting boxes and the flat tubes of the fins / tube block conducted flow medium allows.

This object is achieved in that in at least one Collection box at least one dividing the collection box Partition is provided, which in its outer contour matched an inner contour of a wall of the collecting tank is that it can be soldered tightly all around to the inner contour is, and the a support foot for attaching the partition two adjacent wall sections adjoining one another Has tube ends of the tube end package. By the Provide at least one partition in one of the two collection boxes it is possible to keep the flow medium inside the Redirect ribs / tube block U-shaped, creating the connections for the supply and discharge of the flow medium only one of the water boxes can be provided. The collection boxes depending on their connection to the corresponding Fluid medium circuit on collector or distributor function. Coolant, water, in particular, can be used as the flow medium or air can be provided, the heat exchanger in particular as coolant / air-water / air or air / air cooler is designed. In his latter role the cooler represents an intercooler Solution it is possible, even in collection boxes that without the need for an additional tube sheet widened pipe ends of the fins / pipe block placed are to provide subdivisions by means of at least one partition, which is basically the case with heat exchangers with tube plates was already known. The partition according to the invention Solution is designed so that the partition is already at the pre-assembly of the entire heat exchanger can be integrated can and then in the soldering furnace together with the rest Share the heat exchanger in a common soldering process tightly with the collecting box and the respective pipe ends can be connected. The partition can be held in place using the holding foot in a simple way before putting on the collection box the respective wall sections of the corresponding pipe ends be plugged on.

In an embodiment of the invention, the holding foot has at least a one-piece, web-like tab on the under Formation of a receiving slot protrudes from the partition. Of the Recording slot is designed so that the partition in front the soldering along the wall sections in different Positions put on and possibly even relative to the wall sections of the pipe ends for adjustment can be moved.

In a further embodiment of the invention, the holding foot is included Centering bevels for attaching to the wall sections the pipe ends. Because of these centering bevels Attach the partition to the wall sections of the corresponding ones Pipe ends simplified. Through the holding foot is the partition non-positively on the assigned pipe ends held.

In a further embodiment of the invention, the partition wall at least one fixing lug at a distance from the holding foot, in the assembled state of the partition into a corresponding one Recess protrudes into the wall of the collection box. This creates an additional positive fixation of the Partition achieved on the collection box, making an extremely stable subdivision of the collection box takes place. This is it is possible to have flows within the heat exchanger as well with high pressure because the partition is both on the collecting box as well as on the wall sections of the assigned Pipe ends is held positively. Also the fixing nose is integrally molded like the tab on the holding foot, so that the partition can be designed as a simple sheet metal stamped part can.

In a further embodiment of the invention, the fixing nose provided with at least one deformable display corner, the in the assembled state of the partition through the recess of the Wall protrudes through the collecting box and deformed in this way is that they have an edge of the recess on the outside of the collection box engages positively. Thereby it is possible even before the entire heat exchanger is soldered the positive connection between the partition and the Increase collection box by simply opening the display corner is bent, causing a claw on the outside of the collection box. Are preferred the fixing lug on two opposite sides assigned the opposite of each other, however in same clockwise, are deformed. This results in secure clawing of the partition on the collecting box the soldering, so that the partition in the pre-assembled state of the heat exchanger, i.e. before carrying out the soldering process, is already securely and clearly positioned.

In a further embodiment of the invention, the collecting box has in the area of the partition at least one in one to the Partition parallel positioning rib on, on which the partition is flush when assembled. This form-fitting system ensures stable positioning the partition further improved.

In a further embodiment of the invention are on the collecting tank two positioning ribs spaced parallel to one another are provided, and the partition is provided with supporting edges that in its dimensioning so on the distance of the positioning ribs are matched to each other that the partition - related to a longitudinal axis of the collecting tank - axially secured is held between the positioning ribs. Thereby form the two positioning ribs and lateral guides Systems for the partition, creating a defined orientation the partition is inside the collection box. The partition can preferably already be in the collecting box be preassembled before this on the assigned tube end package is put on. When putting on the Collection box is inevitably the partition with its support foot to the assigned wall sections of two neighboring ones Pipe ends attached.

Fig. 1

zeigt eine Ansicht eines Sammelkastens für eine Ausführungsform eines erfindungsgemäßen Wärmeübertragers,

Fig. 2

eine Draufsicht auf den Sammelkasten nach Fig. 1,

Fig. 3

in vergrößerter Darstellung einen Ausschnitt des Wärmeübertragers im Bereich des Sammelkastens nach den Fig. 1 und 2 auf Höhe einer Trennwand innerhalb des Sammelkastens,

Fig. 4

in vergrößerter Darstellung eine Draufsicht auf den Teil des Wärmeübertragers nach Fig. 3 in Richtung des Pfeiles IV in Fig. 3,

Fig. 5

einen Schnitt durch den Sammelkasten des Wärmeübertragers nach den Fig. 1 bis 4 auf Höhe der Trennwand - jedoch ohne die Darstellung der Trennwand - längs einer Schnittlinie V-V in Fig. 1,

Fig. 6

die Trennwand nach den Fig. 1 bis 4 in einer Ansicht gemäß den Pfeilen VI-VI in Fig. 1,

Fig. 7

eine Seitenansicht der Trennwand nach Fig. 6, und

Fig. 8

eine Draufsicht auf die Trennwand nach den Fig. 6 und 7.

Further advantages and features of the invention emerge from the subclaims and from the following description of a preferred exemplary embodiment of the invention, which is illustrated with the aid of the drawings.

Fig. 1

shows a view of a header box for an embodiment of a heat exchanger according to the invention,

Fig. 2

2 shows a plan view of the collecting box according to FIG. 1,

Fig. 3

in an enlarged view a section of the heat exchanger in the area of the header tank according to FIGS. 1 and 2 at the level of a partition within the header tank,

Fig. 4

3 shows an enlarged view of the part of the heat exchanger according to FIG. 3 in the direction of arrow IV in FIG. 3,

Fig. 5

1 to 4 at the level of the partition - but without the representation of the partition - along a section line VV in Fig. 1,

Fig. 6

1 to 4 in a view according to the arrows VI-VI in Fig. 1,

Fig. 7

a side view of the partition of Fig. 6, and

Fig. 8

a plan view of the partition according to FIGS. 6 and 7.

A heat exchanger, such as a section of FIGS. 1 to 4 is designed as a water / air cooler and corresponds in its basic structure to one heat exchanger described in DE 195 43 986.4. Of the Water / air cooler has a fins / tube block F, W that from a variety of parallel to each other Flat tubes F and a variety of arranged between them Corrugated fins W is composed. The flat tubes F have tube ends 5 on opposite sides, which are expanded in such a way that the neighboring ones Pipe ends 5 flat against each other in a common escape issue. Each tube end 5 is a rectangular, clear Cross section widened, the adjacent pipe ends 5 connect each other with their broad sides and the Narrow sides of the tube ends 5 due to the arrangement of all Pipe ends 5 flush and aligned in a common escape connect to each other. On the pipe ends 5 on the opposite Sides of the fins / tube block are F, W respectively a serving as a collecting box water box 1, where the water boxes 1 each as for the fins / tube block F, W and U-shaped profiles that are open towards the front are. The two water boxes on the opposite Sides of the fins / tube block F, W each have essentially the same profile. Differentiate the two water boxes only in that the one water box 1, which is shown in FIGS. 1 to 5, two connecting pieces 2, 3, of which one connecting piece 2 has a feed line of the water to be cooled and the other connecting piece 3 a derivation of the by means of the fins / tube block F, W cooled water. The connections can, however can also be defined vice versa. The connections to the cooling circuit are therefore only on the one water tank 1 intended. Each water box is on the widened pipe ends 5 placed so that the side walls each The opposite narrow sides of the pipe ends overlap and finish flush and flat with these. Are in the area of their opposite end faces both water boxes through corresponding extensions of side parts closed off the fins / tube block F, W laterally limit and the profiles of the water tanks tight on the front to lock. Both the water boxes and the side parts and the flat tubes F and the corrugated fins W are made of metal, preferably made of aluminum, and are in one joint soldering process soldered tightly together.

To a U-shaped flow of water to be cooled through the water / air cooler, i.e. from the connector in Form of an inlet connector 2 made by a first half of the fins / pipe block through to the opposite water tank and through the other half of the fins / tube block back to the water tank 1 and thus to the outlet nozzle 3 serving connecting pieces, to enable is in the water box 1 on half the axial length - on the Longitudinal extension of the water tank 1 related - a partition 4 provided that divides the water tank 1 into two halves. The partition 4 forms in the following Way a tight seal with the water box 1 and the associated pipe ends 5, so that a safe separation between the flow space in the first half of the water tank 1 and the flow space in the second half of the water tank 1 is created.

The partition 4 represents an essentially flat sheet metal plate are also preferably made of aluminum is. The outer contour of the partition 4 is both in shape as well as their dimensions to an inner contour of the U-shaped Profiles (Fig. 5) of the water tank 1 adapted. The Partition 4 is thus inserted in the water tank 1 Condition with its outer contour all around on the inner contour the inner wall of the water tank 1. The outer contour the partition 4 can be seen from FIG. 6, taking into account is that the partition 4 compared to the illustration of the profile of the water box 1 according to FIG. 5 rotated by 180 ° is.

The partition 4 has a holding foot 9, which in the open End faces of two adjacent pipe ends 5 protrude, which are halfway across the fins / tube block (Fig. 1 to 3). These are the outer contour of the partition 4 defining, opposite side edges in their foot area and thus at the level of the holding foot 9 with one each Gradation 17 (Fig. 6) provided, which is on the upper Front edges of the associated pipe ends 5 in the attached Support the condition of the partition 4. The distance between the two levels 17 to each other thus corresponds exactly to the internal dimensions of the openings defined by the tube ends 5 Flat tubes F.

In order to hold the partition 4 in a force-fitting manner on the adjacent, broad wall sections of the neighboring To enable pipe ends 5, the holding foot 9 also a one-piece molded and graduated bent Support tab 10, 11, which protrudes from the partition 4, that between the support tab 10 and by the Plate shape of the partition 4 defined level to an opposite Opening slot A open on the sides results (Fig. 7). The lower ends of the holding foot 9 have both in the area of the support tab 10 as well as in the plate area the partition 4 each obliquely curved outward centering 11, 12, which securely attach the partition 4 on the assigned wall sections 8 of the neighboring ones Pipe ends 5 even with slight axial misalignment - in Seen longitudinal extension of the water tank 1 - allow.

The partition 4 is in addition to its in the area of the linear Creation of their outer contour, tight soldering with the inner wall of the water tank 1 form-fitting positioned on the water tank 1. On the one hand there are two positioning ribs 6, 7 provided, which are U-shaped over the Extend inner wall of the water tank 1 (Fig. 5) and from protrude from the inside wall. Both positioning ribs 6, 7 are designed like beads. Both positioning ribs 6, 7 run in mutually parallel radial planes - On one along the length of the water tank 1 extending longitudinal axis of the water tank 1 related. Between this positioning ribs 6, 7 is the partition 4 by two Support edges 13 held axially positioned, the right angle from the opposite side edges of the outer contour of the Partition 4 in alignment with this outer contour and the in height in such a way on the distance between the two positioning ribs 6, 7 are matched to each other so that they fit snugly between the positioning ribs 6, 7 are held. In a radial plane of the water tank 1 and thus in the level of Partition 4 are the support edges 13 and thus also the partition 4, however, can be moved between the positioning ribs 6, 7, which only represent linear guides.

To use the partition 4 in its in the water tank 1 The position must also be fixed on one of the holding feet 9 opposite head side of the partition 4 a fixing lug 14 provided in the plane of the partition 4th extended upward stretches. This fixing lug 14 is in the Water box 1 has a corresponding, slot-shaped recess 16 assigned by the fixing lug 14 to the outside of the water box 1 protrudes. The fixing nose 14 is also on their opposite sides with one each Exhibition corner 15 provided by in a simple manner corresponding, parallel to the outside of the water tank 1 Slits of the fixing lug 14 from their opposite Pages are created. These display corners 15 are deformable, the slots preferably being such the depth of the recess 16 in the water tank 1 matched are that the Ausstellcken 15 on the outside of the water tank 1 can be bent to the side and such a clawing of the partition 4 with the water tank 1 form (Fig. 4). 4, it must be taken into account that the top view shown rotates by 180 ° compared to the representations shown in FIGS. 1 to 3 is.

For mounting the water / air cooler and especially for mounting the partition 4 inside the water box 1 will initially the partition 4 inserted so far in the water tank, until the fixing lug 14 protrudes through the recess 16. The partition 4 is between the two positioning ribs 6, 7 inserted and along these positioning ribs 6, 7 to the linear shape of their outer contour moved with the inner wall of the water tank 1. Subsequently the display corners 15 are preferably by means of a tool in the form of pliers or the like according to FIG. 4 bent, whereby the positive fixation of the Partition 4 in the water tank 1 results. At the subsequent Place the water box 1 on the widened pipe ends 5 of the fins / tube block F, W, the holding foot 9 is inevitable on the wall sections 8 of the associated, adjacent Pipe ends 5 pushed on until the gradations 17th strike on the upper end edges of the respective pipe end. After attaching the side panels, you can do so pre-assembled water / air cooler in a simple manner in one Soldering furnace can be soldered tightly by a single soldering process.

Of course, all have to be soldered tightly together Parts of the water / air cooler and thus the corresponding ones Surfaces of the partition 4 and the water box 1 suitable Solder plating that causes this soldering.

Claims (7)

Heat exchanger for a motor vehicle with a fins / tube block arranged between two header boxes, all tube ends of the fins / tube block in the region of each header box being widened and joined together flatly to form a tube end package, and the two header boxes each being placed flush on the assigned tube end package and are tightly soldered to it,
characterized,
that in at least one collecting box (1) at least one dividing wall (4) dividing the collecting box (1) is provided, the outer contour of which is matched to an inner contour of a wall of the collecting box (1) in such a way that it can be soldered tightly around the inside contour , and which has a holding foot (9) for plugging the partition (4) onto two flat sections (8) of adjacent pipe ends (5) of the pipe end package. Heat exchanger according to claim 1, characterized in that the holding foot (9) has at least one integrally molded has web-like tab (10), with formation a receiving slot (A) protrudes from the partition (4). Heat exchanger according to claim 2, characterized in that the holding foot (9) with centering bevels (11, 12) for Push on the wall sections (8) of the pipe ends (5) is provided. Heat exchanger according to one of the preceding claims, characterized in that the partition (4) at a distance has at least one fixing lug (14) for the holding foot (9), the in the assembled state of the partition (4) in a corresponding Recess (16) in the wall of the collecting tank (1) protrudes. Heat exchanger according to claim 4, characterized in that the fixing lug (14) with at least one deformable Exhibition corner (15) is provided in the assembled state the partition (4) through the recess (16) of the wall of the Collection box (1) protrudes and is deformed such that an edge of the recess (16) on the outside of the Collection box (1) engages positively behind. Heat exchanger according to one of the preceding claims, characterized in that the collecting box (1) in the area the partition (4) at least one in one to the Partition (4) parallel positioning rib (6, 7) on which the partition (4) in the assembled state fits flush. Heat exchanger according to claim 6, characterized in that on the collecting box (1) two mutually parallel spaced Positioning ribs (6, 7) are provided, and that the partition (4) is provided with supporting edges (13) which in their dimensioning in such a way on the distance of the positioning ribs (6, 7) are matched to each other that the partition - Relative to a longitudinal axis of the collecting tank (1) - axially is securely held between the positioning ribs (6, 7).

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