DE19746371A1 - Heat exchanger with twin=chamber collection box - Google Patents

Abstract

The heat exchanger has a collection box (10) made by the combining of a metal first half box (12) with U-shaped cross section bounded by a bottom surface (54) and two side surfaces, and a second half box (14) Its cross section is formed by a bottom surface (82) and at least one side surface (84). The halves are joined by soldering along the connecting regions, so that an internal dividing wall is formed bounding two adjacent chambers (18,20). A tube cluster (26) can run through the two parts (30,32).

Description

The invention relates to a heat exchanger, in particular for motor vehicles.

In particular, the invention relates to heat exchanger with a collecting box that has an outer wall, contains an internal partition and a collector plate, the jointly two adjoining chambers limit, each with one of two parts of one Pipe bundle can be connected.

Such heat exchangers are already known in a heating and / or air conditioning system for power vehicles are used.

Such a heat exchanger can in particular from one hot heat transfer medium, generally from the Coolant of the vehicle engine flows through who to heat an air stream that flows through the pipes of the tube bundle and for introduction into the Passenger compartment of the vehicle is determined.

A collection box of the aforementioned type makes it possible the heat transfer medium in two separate circulations  circulate, each one of the two parts of the Correspond to the tube bundle.

The two chambers of the collection box can have two Be longitudinal chambers, which ge through a longitudinal partition are separate, the two parts of the tube bundle are two adjacent layers, each along two large surfaces of the heat exchanger are ordered. The heat transfer medium follows a so-called methodical circulation.

To form the two layers, either two Pipe rows or a row with double channel pipes be used, which is also referred to as "two-channel pipes" be net.

The tubes of the tube bundle are at one end with the connected above collection box, the usual se is provided with two sockets, which serve as an inlet or serve as the outlet of the heat transfer medium.

At their other end, the pipes are through suitable Means linked together, for example by U-shaped connections, cross pieces, through a direct Connection between the pipes etc. to the connector between the two layers.

With the chambers of the collection box, it can be as Variant to act as cross-chambers through a cross Partition are separated, the heat transfer medium circulated in partial bundles and thereby a U-shaped Circulation follows.

On the opposite of the collection box with two chambers the two sub-bundles protrude on the lying side another collection box without a partition in connection.  

The aforementioned collection boxes are usually as Molded parts made of plastic, the outside wall and the partition in one piece as a molded part Plastic are formed. Such a gathering box is published in FR-A-2 572 797 spelled out.

It is also known to make the outer wall from one deep-drawn sheet metal to form and the partition to make from another sheet, the scope on the one hand on the outer wall and on the other hand on the Collection board is soldered, as in the published Lich FR-A-2 711 236 is set out.

These known collection boxes have the disadvantage that they are relatively space consuming, which is special adversely affects if the heat exchanger for the Attachment in a confined space is provided, such as this is especially the case with heating and / or air conditioning sierungsgehäuse a motor vehicle is the case.

In addition, there is another disadvantage of this known collection boxes in that they are only on completely agreed places sockets for the circulation of the heat transfer can record germ medium.

If the collection box is made of plastic, are the arrangement and alignment options the spigot is limited due to specifications that are associated with related to molding and demolding.

If a metal collection box is used, he generally follows the connection of the nozzle nen on the bottom of the outer wall, which is the use of curved and therefore correspondingly space-consuming Trim requires.

The invention is particularly based on the object de to eliminate the aforementioned disadvantages.  

To do this, it proposes a heat exchanger at the beginning mentioned type in which the outer wall and the partition wall of the collection box by assembling one first half of the box made of metal with an open surface che, which has a generally U-shaped cross section points by a floor surface and two opposite lying side faces is limited, and one second box half made of metal with an open Surface are formed that have a cross section points by a floor surface and at least one Side area is limited, the two boxes halves attached to each other and ent by soldering long together their respective connection areas be added so that the inner partition of the Collection box at least from one side of the the first half of the box.

In a first embodiment of the invention the second half of the box also a general one U-shaped cross section on through a floor surface and bounded by two opposite side surfaces the inner partition of the collecting tank a side surface of the first half of the box and at least least from part of one side surface of the second Half of the box emerges, these two sides walls are arranged adjacent to each other and the Form connection areas.

In this first embodiment, the can the adjacent side walls approximately extend the same height so that they are both with come into contact with the collector plate. This ent there is a reinforced inner partition.

As a variant, the two can look at each other bordering side walls at different heights extend so that only the side surface of the first Half of the box comes into contact with the collecting plate. This saves material.  

In a second embodiment of the invention the second half of the box is a cross section with a general L shape on by a floor surface and a side surface is limited so that the In Partition of the collection box from one side only area of the first half of the box emerges, with the Connection areas on the one hand through the side surface the first half of the box and on the other hand by a free edge of the bottom surface of the second half of the box be formed.

The side faces of the first and second boxes half can be longitudinal surfaces, the two together limit adjacent longitudinal chambers, which are separated by a Longitudinal partition are separated, the two parts of the tube bundle are two tube layers.

Thereby the execution of a heat exchanger with methodological circulation as described above enables.

As a variant, the side surfaces of the first and the second half of the box be transverse surfaces, which then delimit two adjacent transverse chambers, which are separated by a cross partition, the form two parts of the tube bundle sub-bundle that enable a U-shaped circulation.

In this way, the collection box with two is created Chambers by joining together two collecting boxes halves, the two attached to each other and through Form soldered half-shells.

According to an advantageous feature of the invention the connection areas of the two box halves appropriately adapted holding means to the provisional cal bracket of the two box halves before their Zu to ensure assembly by soldering. By these holding means can also connect the two  areas during their soldering in the system be held together.

These holding means advantageously comprise at least at least two bent approaches, one of the two go out the box halves and in openings with can be fitted according to the adapted form, which are worked into the other half of the box.

It is particularly advantageous to U-shaped bent to use sets, which makes better pressure the connection areas with respect to each other their joining is made possible by soldering.

Each box half also includes two more opposite side faces, creating an open Area with a generally rectangular outline can be delimited by the collector plate can be closed.

According to another advantageous feature of the inven manure comprises at least one of the two halves of the box an increased in relation to the floor area jump to the connection of a nozzle for circulation to enable the heat transfer medium.

This projection preferably comprises two opposite lying side surfaces, at least one of which is egg ne of the side surfaces of the corresponding box half extended.

One of the side surfaces of the protrusion contains geous an opening to connect the To enable the nozzle.

Thereby the direct connection of a nozzle in possible in a direction that is generally perpendicular runs to the two layers, so that on the Verwen  extension of a curved nozzle can.

The two box halves are advantageously in each case by deep drawing from a metal sheet preferably made of an aluminum alloy.

This metal sheet is advantageously on both Sides coated with solder plating.

In a preferred embodiment of the invention is the collector plate with a peripheral edge strip for fit the two box halves.

This feature contributes to a safe provisional Holder of the collecting box and the collecting plate in front the soldering of the unit.

In another aspect, the invention relates to egg a collecting box for one heat exchanger, the two Box halves include as defined above were.

In the description below as an example Exercise is referenced to the accompanying drawings taken. The following show in detail:

Figure 1 is a front view of a heat exchanger with a header box according to the invention.

Fig. 2 is a sectional view taken along the line II-II of Fig. 1;

Fig. 3 is a partial perspective view of the two box halves of the header box before assembly;

Figure 4 is a view similar to Figure 3 after the two box halves have been joined;

Fig. 5 is another perspective partial view of the two assembled box halves;

Fig. 6 is a schematic cross-sectional view of a heat exchanger is provided with a collecting box having two longitudinal chambers;

Fig. 7 is a perspective schematic partial view of the two box halves of the heat exchanger of Fig. 6;

Fig. 8 is a cross-sectional view of a Wärmetau clipper comprising a header box with two transverse chambers; and

Fig. 9 is a perspective schematic view of the two divisional applications box halves of the header box of the heat exchanger of Fig. 8.

First, reference is made to FIGS. 1 and 2, which illustrate a heat exchanger which, in the example presented, forms a heating radiator for the driving space of a motor vehicle.

The heat exchanger comprises a header box 10 , which is formed by the assembly of two box halves 12 and 14 , each having a cross section with the general shape of a U ( Fig. 2). These two box halves, together with a collecting plate 16 also referred to as a “perforated plate”, delimit two adjacent longitudinal chambers 18 and 20 ( FIG. 2).

The box halves 12 and 14 are fitted into the collecting plate by means of a bar 17 arranged on this peripheral edge.

The box halves 12 and 14 are provided with an inlet nozzle 22 or with an outlet nozzle 24 for the circulation of a heat transfer medium, which in the example shown is the coolness of the vehicle engine.

In addition, the heat exchanger comprises a tube bundle 26 , which consists of a plurality of flat tubes 28 , which are referred to as "two-channel tubes". These tubes each have a cross section in the form of an 8 and thereby limit two adjacent channels 30 and 32 , which are connected to the chambers 18 and 20 ( Fig. 2).

The channels 30 and 32 have ends 34 and 36 , respectively, which are inserted into corresponding tubes 38 and 40 of the collecting plate 16 . In addition, channels 30 and 32 have opposite free ends 42 and 44 which are closed by a molded plate or closure plate described below.

Moreover, the channels 30 and 32 of each tube 28 are connected to one another on the side opposite the collecting box 10 through openings 46 ( FIG. 2), which are incorporated in a partition 54 between the channels 28 and 32 .

The heat transfer medium ( FIG. 2) flows through the connector 22 into the heat exchanger (arrow F1), enters the chamber 18 and then circulates in a first position, which is formed by the respective channels 30 of the pipes 28 (arrow F2). The heat transfer medium then flows through the openings 46 of the tubes 28 (arrow F3) in order to get into the respective channels 32 of the tubes 28 . The heat transfer medium circulates in the channels 32 to form a second layer (arrow F4), which runs parallel to the first layer, the circulation in the second layer taking place in the opposite direction to the circulation in the first layer. Then the heat transfer medium enters the chamber 20 and leaves the heat exchanger through the outlet port 24 (arrow F5).

In this way, the heat exchanger enables the heat transfer medium to circulate in two parallel layers, which is also referred to as "methodical circulation", the circulation in the two layers taking place in the vicinity of two large surfaces 48 and 50 of the heat exchanger ( Fig . 2).

As can be seen in Fig. 1, the Wärmetau shear also includes a plurality of intermediate elements 52 with a corrugated shape, which form heat exchange fins and are arranged between the tubes 28 .

The tube bundle 26 formed by the tubes 28 and the intermediate elements 52 can thereby be flowed through by an air stream which exchanges heat with the heat transfer medium so as to be heated for the heating of the passenger compartment.

Reference is now made to FIG. 3 to describe the structure of the two box halves 12 and 14 .

These two box halves are separated by deep drawing a metal sheet, more advantageous wise made of an aluminum alloy, the be solder plating on both sides is layered.

The box half 12 has a generally elongated shape and includes a bottom surface 54 which is connected to two opposite side surfaces 56 and 58 (longitudinal surfaces) and two opposite side surfaces 60 and 62 (transverse surfaces) ( Fig. 1). Surfaces 56 and 58 are parallel to each other, as are surfaces 60 and 62 .

The box half 12 therefore has a cross section in the shape of a U, the bottom of which is formed by the surface 54 and the leg of which is formed by the longitudinal surfaces 56 and 58 . The latter end in end edges 66 and 68 , which run parallel to each other ( Fig. 3 to 5). In the example shown, the legs of the U have the same length.

The box half 12 comprises a projection 70 which is raised in relation to the bottom surface 54 . Before jump 70 includes an upper surface 72 , which belongs to the Bodenflä surface 54 and which gradually increases from the transverse surface 62 to the transverse surface 60 .

In addition, the projection 70 is delimited by two Seitenflä surfaces 74 and 76 , which limit the longitudinal surfaces 56 and 58, respectively. A circular opening 78 ( FIG. 5) for connecting the connection piece 22 is machined into the surface 74 .

In addition, the longitudinal surface 56 ( Fig. 3) contains a plurality of spaced openings 80 which are arranged on a same line and which extend parallel and at a distance from the edge 66 . The function of these openings will be explained below.

The box half 14 comprises a bottom surface 82 which is connected to two opposite side surfaces 84 and 86 (longitudinal surfaces) and with two opposite side surfaces 88 and 90 (transverse surfaces) ( Fig. L). The box half 12 has the shape of a U in cross section, the bottom of which is formed by the surface 82 and the two legs of which are formed by the longitudinal surfaces 84 and 86 . In this connection it should be pointed out that the surface 86 extends at a lower height than the surface 84 , so that a U is formed in cross section, the legs of which have different lengths.

The surface 86 includes a trailing edge 92 which is extended by a plurality of lugs 94 which are bent into a U-shape and are arranged in alignment with one another. The task of the approaches is to engage in the respective openings 80 of the box half 12 .

The longitudinal surface 84 ends in an edge 96 . The bottom surface 82 does not contain a projection, that is, it extends in a plane whose distance in relation to the edge 96 is constant. The bottom surface 82 includes an opening 98 ( FIGS. 3 and 4) for the insertion of the outlet port 24 .

For the production of the heat exchanger of Fig. 1 and 2, the two box halves are first 12 and 14 are connected together by the lugs 94 of the Ka stenhälfte 14 are inserted into the openings 80 of the box half 12, whereby a provisional holding tion of the two case halves is made possible, which are attached to each other. Then who the two so attached to each other box halves fit into the collecting plate 16 , which is made possible by their peripheral edge strip 17 ( Fig. 1 and 2). After fitting, the end edges 66 and 68 of the box half 12 and the end edge 96 of the box half 14 rest against the collecting plate 16 , where it is possible by delimiting the two chambers 18 and 20 . The longitudinal surface 56 of the box half 12 forms a longitudinal partition between the chambers 18 and 20 .

Incidentally, the collecting box thus formed by the joining of the two box halves 12 and 14 and the collecting plate 16 is joined together with the tube bundle 26 and also connected to the connecting pieces 22 and 24 .

The unit can then be converted into a suitable one Furnace are used to solder the various to make those components.

It should be noted that it is made possible by the approaches 94 and openings 80 described above to hold the longitudinal surfaces 56 and 86 close together, which has an advantageous effect on a flawless soldered connection.

In the embodiment of FIGS. 1 to 5, the longitudinal surfaces 56 and 86 form the respective connecting regions of the box halves 12 and 14 .

The projection 70 formed on the box half 12 enables a direct connection of the connector 22 in a direction perpendicular to the circulation positions of the heat transfer medium, which was previously not possible.

Otherwise, the nozzle 24 is connected directly to the bottom surface 82 of the box half 14 , that is, that its direction is parallel to the plane of the layers.

In the embodiment of FIGS. 6 and 7, the collecting box 10 is also formed by the assembly of two box halves 12 and 14 , the longitudinal chambers for a circulation in two layers N1, N2 be limit.

Compared to the previous embodiment, the main difference is that the collector box 14 has a cross section with a general L-shape, which is limited by the bottom surface 82 and the side surface 84 . The bottom surface 82 is not extended by another side surface, but ends at the level of a free edge or closing edge 100 , which forms one of the connection areas. The task of this free edge is to come into contact with the side surface 56 of the box half 12 in the vicinity of the connection of this side surface 56 on the bottom surface 54 . It should be noted that the side surfaces 88 and 90 of the box half 14 also come into contact with the side surface 56 of the box half 12 through their respective free edges.

In the embodiment of FIGS. 8 and 9, the collecting box 110 is formed by two box halves 112 and 114 which delimit two transverse chambers 118 and 120 in order to enable the heat transfer medium to be circulated in two parts P1 and P2 of the tube bundle which form two sub-bundles. At the other end, the tubes of the tube bundle are connected to a collecting chamber 102 without a partition, whereby a U-shaped circulation can be brought about. The box halves 112 and 114 interact with a collecting plate 116 men.

The box half 112 has a generally U-shaped cross section, which is delimited by a bottom surface 154 and two opposite side surfaces 156 and 158 (transverse surfaces). The box half 114 has an L-shaped cross section which is delimited by a base surface 182 and a side wall 184 (transverse wall). The bottom surface 182 ends in a free edge 200 , which enables the assembly of the box half 114 with the side surface 156 of the box half 112 .

As a variant, the collecting box 114 could have a general U-shaped cross section and comprise another side wall 186 (transverse wall), which is opposite the wall 184 , as is indicated in FIG. 9 by dashed lines. In this case, the transverse wall would be formed by this other side wall 186 of the box half 114 and by the wall 156 of the box half 112 .

The invention of course leaves numerous execution variants too.

So it is possible to provide that none of the boxes halves comprises a projection, or that each of the Ka half has a projection, each of the installation specifications for heat is dependent on the exchanger.

In addition, although the invention has been particularly Reference to a heating radiator for driving described the interior of a motor vehicle; she can however also for other types of heat exchangers Find.

Claims (18)

1. heat exchanger comprising a collecting tank with an outer wall, an inner partition and a Sam melplatte, which together delimit two adjacent chambers ( 18 , 20 ; 118 , 120 ), which with two parts (30, 32; N1, N2; P1, P2) of a tube bundle ( 26 ) can be connected, characterized in that the outer wall and the partition wall of the collecting tank ( 10 ; 110 ) by the assembly of a first box half made of metal ( 12 ; 112 ) with an open surface, which generally Has a U-shaped cross section, which is bordered by a bottom surface ( 54 ; 154 ) and two opposite side surfaces ( 56 , 58 ; 156 , 158 ), and a second box half made of metal ( 14 ; 114 ) with an open surface be, which has a cross section, which is limited by egg ne floor surface ( 82 ; 182 ) and at least one side surface ( 84 , 86 ; 184 , 186 ), and that the two box halves ( 12 , 14 ; 112 , 114 ) to each other are set and joined together by soldering along their respective connecting areas so that the inner partition of the collecting tank ( 10 ; 110 ) at least from a side surface ( 56 ; 156 ) of the first box half ( 12 ; 112 ) emerges. 2. Heat exchanger according to claim 1, characterized in that the second box half ( 12 ; 112 ) also has a generally U-shaped cross section through a bottom surface ( 82 ; 182 ) and two opposite side surfaces ( 84 , 86 ; 184 , 186 ) is limited, and that the inner partition of the collecting box ( 10 ; 110 ) from a side surface ( 56 ; 156 ) of the first box half and at least part of a side surface ( 86 ; 186 ) of the second box half emerges, these two Be tenwalls are arranged adjacent to each other and form the connection areas. 3. Heat exchanger according to claim 2, characterized in that the two adjacent side walls ( 56 , 86 ; 156 , 186 ) extend at approximately the same height, so that they are both in contact with the collecting plate ( 16 ; 116 ) come. 4. Heat exchanger according to claim 2, characterized in that the two adjacent side walls ( 56 , 86 ; 156 , 186 ) extend at different heights, so that only the side surface ( 56 ; 156 ) of the first box half with the collecting plate ( 16 ; 116 ) comes into contact. 5. Heat exchanger according to claim 1, characterized in that the second box half ( 14 ; 114 ) has a cross section with a general L-shape, which is delimited by a bottom surface ( 82 ; 182 ) and a side surface ( 84 ; 184 ), so that the inner partition of the header box only comes from one side surface ( 156 ; 156 ) of the first box half, the connection areas on the one hand through the side surface ( 56 ; 156 ) of the first box half and on the other hand through a free edge ( 100 ; 200 ) of the second Box half are formed. 6. Heat exchanger according to one of claims 1 to 5, characterized in that the side surfaces ( 56 , 58 ) of the first box half ( 12 ) and the side surfaces ( 84 , 86 ) of the second box half ( 14 ) are longitudinal surfaces which are two adjacent to each other Limit longitudinal chambers ( 18 , 20 ) which are separated by a longitudinal partition ( 56 ) and that the two parts of the tube bundle are two tube layers (N1, N2). 7. Heat exchanger according to one of claims 1 to 6, characterized in that the side surfaces ( 156 , 158 ) of the first box half ( 112 ) and the side surfaces ( 184 , 186 ) of the second box half ( 114 ) are transverse surfaces, the two adjacent to each other Limit cross chambers ( 118 , 120 ), which are separated by a transverse partition ( 156 ), and that the two parts of the tube bundle are two sub-bundles (P1, P2) which enable a U-shaped circulation. 8. Heat exchanger according to one of claims 1 to 7, characterized in that the connecting areas ( 56 , 86 ) of the two box halves ( 12 , 14 ) comprise appropriately adapted holding means ( 94 , 80 ) to temporarily hold the two box halves before they are assembled to ensure by soldering. 9. Heat exchanger according to claim 8, characterized in that the holding means comprise at least two bent lugs ( 94 ) which start from one of the two box halves ( 12 , 14 ) and which can be fitted into openings ( 80 ) with a correspondingly adapted shape which are incorporated in the other half of the box. 10. Heat exchanger according to claim 9, characterized in that the lugs ( 94 ) are bent into a U-shape. 11. Heat exchanger according to one of claims 1 to 10, characterized in that each de box half ( 12 , 14 ) also comprises two further opposite side surfaces ( 60 , 62 ; 88 , 90 ), whereby an open surface with a generally quite angular outline can be limited, which can be closed by the collecting plate ( 16 ). 12. Heat exchanger according to one of claims 1 to 11, characterized in that at least one of the two box halves comprises a projection ( 70 ) which is raised in relation to the base surface ( 54 ) in order to enable the connection of a connecting piece ( 22 ) for the circulation of the heat transfer medium . 13. Heat exchanger according to claim 12, characterized in that the projection ( 70 ) comprises two opposite side surfaces ( 74 , 76 ), at least one of which extends the side surfaces ( 56 , 58 ) of the box half ( 14 ). 14. Heat exchanger according to claim 13, characterized in that one of the side surfaces ( 74 ) of the projection ( 70 ) contains an opening ( 78 ) for the connection of the connecting piece ( 22 ). 15. Heat exchanger according to one of claims 1 to 14, characterized in that the two box halves ( 12 , 14 ; 112 , 114 ) are each made by deep drawing from a metal sheet, preferably from an aluminum alloy. 16. Heat exchanger according to claim 15, characterized characterized in that the metal sheet coated on both sides with a solder plating is. 17. Heat exchanger according to one of claims 1 to 16, characterized in that the collecting plate ( 16 ; 116 ) with a peripheral edge strip ( 17 ) for fitting the two box halves ( 12 , 14 ) is provided. 18. Collection box for a heat exchanger, characterized in that it comprises two box halves ( 12 , 14 ; 112 , 114 ) as defined in one of claims 1 to 17.