DE102008029420A1 - Collection box, in particular a heat exchanger of a motor vehicle, and heat exchanger, insbesondere capacitor, a motor vehicle - Google Patents

Abstract

The invention relates to a collecting box, in particular a heat exchanger of a motor vehicle, comprising a tube bottom comprising first contact surfaces, with a box part comprising further contact surfaces, in which the tube sheet and the box part are soldered together at soldering areas, and in which the first contact surfaces and the second contact surfaces Soldering areas can form, wherein the collecting box is characterized by means for securing contact, by means of which in the soldering areas critical removal of the contact surfaces is prevented from each other, whereby the risk of leaking soldering areas is reduced.

Description

The The invention relates to a collecting box, in particular a heat exchanger a motor vehicle, having a tube plate comprising first contact surfaces, with a box part comprising second contact surfaces, at which the tube sheet and the box part at soldering areas are soldered together, and wherein the first contact surfaces and the second contact surfaces form the soldering areas can. Furthermore, the invention relates to a heat exchanger, In particular, a capacitor, a motor vehicle with a Heat exchanger block and with collecting boxes, at which cooling tubes of the heat exchanger block into the collection boxes.

generic Collection boxes for heat exchangers are well known in the art and often exist from at least two Formtei len, which soldered together are, so that the collecting tank in particular liquid-tight and pressure resistant can be formed. In the aforementioned moldings it is usually a tube plate and a box part or a lid of the collecting tank.

From the publication DE 103 15 371 A1 For example, a heat exchanger with an at least two-part collection box of a bottom and a lid is known, wherein the bottom and the lid are soldered together at common contact surfaces. So that the collecting tank is constructed particularly resistant to pressure, the bottom has edge strips, so that the cover can be inserted into the ground and undergoes lateral guidance by means of the edge strips. In addition, further contact surfaces are provided along the central axis of the collecting box, which provide additional soldering areas on the collecting box in addition to the edge strip area. In particular, by means of the edge strips can also be a good pre-fixing the lid on the floor succeed, so that the contact surfaces for forming the soldering areas on the bottom and lid are securely stacked so that they cover well during transport of the components together prefixed and during the soldering process can.

In another heat exchanger from the published patent application DE 10 2004 037 688 A1 there is a collection box in this respect also at least from a bottom and a lid, which form at common contact surfaces soldering areas where they are soldered together. So that the two components of the collecting tank can advantageously be prefixed with each other before the actual soldering process, at least one of the two moldings has lug-like structures which can at least partially surround the floor inserted in the lid, so that the floor is no longer unintentionally counter to a loading direction can solve from the lid of the collecting tank. It is possible by means of the tab-like Ge to pre-fix the bottom and the lid of the collecting box well before soldering.

From the publication US 2003/0159813 A1 For example, a cover of a header tank and a bottom of the header tank are crimped lengthwise before brazing at their edge portions, so that the cover and bottom are well pre-fixed for first handling of the header tank. In addition, a latching connection is provided in a longitudinal dividing wall region of the collecting box, which extends over the entire length of the longitudinal dividing wall region, wherein latching noses of a first molded part can engage in undercuts of a second molded part of the collecting box, whereby the cover and bottom of the collecting box well prefixed together in this longitudinal dividing wall area are.

It object of the present invention is generic Further develop collection boxes.

The The object of the invention is of a collecting box, in particular a heat exchanger of a motor vehicle, with a tubesheet comprising first contact surfaces, with a box part comprising further contact surfaces solved, in which the tubesheet and the box part at soldering areas are soldered together, and in which the first contact surfaces and the second contact surfaces the soldering areas can form, with the collecting tank by means for securing contact, by means of which in the soldering areas a critical removal of the contact surfaces prevented from each other becomes.

Although it is known from the prior art, prefixed to each other to be soldered moldings of a collecting tank, such as a tube sheet and a box part, so that the two moldings are well handleable before the actual permanent assembly and the risk of falling out of the pre-fixed collecting box Auseifallens is reduced. However, it can not be reliably ensured by means of such conventional prefixing that the contact surfaces to be soldered together in the actual soldering areas are also so close and good that a high quality soldered connection can be formed there between the molded components of the collecting box to be soldered. A non-optimal solder joint can drastically reduce the strength of the header, in particular the resistance of the header to high internal pressures, so that about the bursting pressure of the Collection box is substantially reduced. Even if the molded components of the collecting tank to be soldered were previously pressed against each other during the pre-fixing, it can not be guaranteed due to production inaccuracies in the production of the molded components that they can always lie sufficiently against one another at their contact surfaces. Even if they are still sufficiently adjacent to one another during the pre-fixing, it can happen, in particular in the case of heating with respect to a soldering process, that two contact areas forming a soldering area critically move away from each other so that a sufficient solder joint can not form there.

through the means for contact assurance according to the invention However, the danger is drastically reduced that two become one Soldering area forming contact surfaces critical of each other remove. This ensures that the collection box is particularly pressure stable. This is especially with regard to capacitors advantageous, since these often cold processes with high Press must be mastered.

Of the Term "contact surface" describes surfaces the tube bottom or the box part, in general so the collecting box, which can provide adjacent soldering areas, in which a solder joint between the tube sheet and the Box part to be formed.

Of the The term "soldering areas" describes here those areas of the contact surfaces on which molded parts the collecting tank soldered together by means of solder joints should be. In this context, it is understood that not all contact surfaces between the mold components inevitably Have to form soldering areas.

It It is also understood that the means for contact security, below also called contact securing means for short, more diverse Being able to take shape with them is something extraordinary good contact between contact surfaces of the molded parts of the Collection box can be ensured, so that a soldering during these contact surfaces a common soldering process of the header especially can train well. The contact security funds can be provided here at almost all contact surfaces, to form the soldering areas of the collecting tank.

A preferred embodiment sees in this context in that the means for securing the contact on a longitudinal dividing wall region of the Collection box are arranged. Such a longitudinal partition wall area can divide the collection box into two main channels. In particular, this makes it ideal for placement contact surfaces both on the tubesheet and on the box part of the collecting box, wherein the pressure resistance of the collecting tank can be particularly high when the tubesheet and the box part are soldered together there.

constructive simply the contact assurance means can be provided be when the means of securing contacts within the soldering areas are arranged. Although this reduces the respective soldering area, however, this can be compensated with a better solder joint become. In particular, if not the entire soldering area for the fulfillment of the strength requirements is required.

The Quality of the solder joints at the soldering areas of the collecting tank can be further increased if the funds for contact securing have Lötinitialisierungsgebilde. Such Lötinitialisierungsgebilde can be particularly reliable contact between the first contact surfaces and ensure second contact surfaces of which originate from a solder joint excellent can.

In In this context, it is advantageous if the means for securing contacts Elevations within the first contact surfaces and / or having the second contact surfaces.

About that In addition, it is advantageous if the means for securing contacts Lowering within the first contact surfaces and / or the have second contact surfaces.

are Surveys of means of securing contacts and lowering funds positively connected with each other for securing the contact, can contact surfaces at soldering areas particularly reliable to each other to be kept lying.

In In practice, it has proved to be advantageous if the means have a pin-hub connection for securing contacts.

penetration the means for securing contact the tube sheet or the lid can additionally press connections from outside to inside Soldering areas are produced, creating a special Close pressure of the first and second contact surfaces to each other can be guaranteed.

For example, in this connection, a pin of a tube plate can be inserted into a hub, which may be formed as a through hole on a box part, such that a free end of the pin is accessible from the outside of a header, so that the pin in the hub be pressed from the outside can. In this respect, a particularly close-fitting contact fixation can be achieved.

are the means for securing contact along a longitudinal axis the collecting tank spaced from each other, can between the individual contact security funds at the contact areas form additional soldering areas, so that the Tube bottom and the box part sufficiently large area can be soldered together.

In In this context, the task is also performed by a heat exchanger, in particular of a condenser, a motor vehicle with a heat exchanger block and solved with collecting boxes, in which cooling tubes of the heat exchanger in the collecting tanks open, with the heat exchanger characterized in that he is a collector's box after one of the here comprises explained combinations of features.

Further Advantages, objects and characteristics of the present invention explained on the basis of the following description of the appended drawing, in which by way of example a heat exchanger as well a tube sheet and a box part of a header of the heat exchanger are shown.

It shows

1 1 is a schematic view of a heat exchanger with laterally arranged collecting boxes;

2 2 is a schematic perspective view of a tube plate with contact securing means in the form of pins in the region of a longitudinal dividing wall of a collecting box;

3 1 is a schematic perspective view of a box part with contact securing means in the form of through holes in the region of the longitudinal dividing wall of a collecting box;

4 schematically a perspective view of a collecting tank with the tube sheet from the 1 and with the box part from the 3 and with additional prefixing tabs,

5 schematically another perspective view of the collecting tank from the 4 with bent and fixed prefixing straps,

6 schematically again a perspective view of the collecting tank from the 4 and 5 with pressed contact securing means,

7 schematically a cross section of the collecting tank from the 4 to 6 in the field of compressed contact security, and

8th schematically a longitudinal section of the header box in the area pressed contact securing means.

The Indian 1 exemplified heat exchanger 1 can be used in motor vehicles, for example, to cool coolant of an internal combustion engine (not shown here). The heat exchanger 1 includes a radiator network 2 at which a coolant inlet box 3 and a coolant drain box 4 are arranged. Between the two coolant boxes 3 and 4 run coolant pipes 5 (Numbered here only by way of example), so that a coolant to be cooled from the coolant inlet box 3 to the coolant drainage loads 4 can flow. In order to substantially improve a heat dissipation of the heat energy inherent in the coolant, in this embodiment, between the individual coolant tubes 5 Fins waves 6 arranged, extending from the coolant inlet box 3 up to the coolant drain box 4 extend. Each of the cooling fins waves 6 provides a variety of cooling fins 7 at the heat exchanger 1 to disposal. By means of the provided cooling fins 7 becomes the total leakage area for thermal energy of the heat exchanger 1 increased in an advantageous manner, which in turn the cooling capacity of the heat exchanger 1 can be improved. In the middle of the heat exchanger 1 is a vertical walkway 8th provided by means of which the cooling pipes 5 can be held in addition.

Both the coolant inlet box 3 as well as the coolant drain box 4 each consist of a curved tubesheet 9 and a curved box part 10 put together (here only with regard to the coolant inlet box 3 numbered).

The tube sheet 9 and the box part 10 are at a seam 11 liquid-tight pressed together and at the top 12 with a first closure 13 and at the bottom 14 with another closure 15 locked. In the area of the top 12 has the coolant inlet box 3 also via a coolant inlet 16 while the coolant drain box 4 in the area of the bottom 14 a coolant drain 17 having.

The respective bent tubesheet 9 of the coolant inlet box 3 or the coolant drain box 4 is opposite to the individual coolant pipes 5 arranged such that the coolant tubes 5 essentially at a right angle 18 to the longitudinal extent 19 are aligned.

While the coolant supply 16 or the coolant outlet 17 each at the corresponding box part 10 are provided communicate the coolant tubes 5 with the respective bent tubesheet 9 of the coolant inlet box 3 respectively. of the coolant drain box 4 by pulling through 20 of the bent tube bottom 9 punctured. The passages 20 are along the longitudinal extent 19 at a bottom portion of the tube sheet 9 arranged.

The coolant inlet box 3 and the coolant drain box 4 can generally be used as collection boxes 21 which are essentially each of a tubesheet 9 and a box part 10 are set together, as they are described below by way of example.

The Indian 2 tube sheet shown 9 indicates at its elongated edges 22 a variety of Vorfixierlaschen 23 on.

Along its tube bottom central axis 24 extends a longitudinal partition wall area 25 the collection boxes 21 , In this longitudinal partition wall area 25 has the tubesheet 9 first contact surfaces 26 (numbered here only by way of example), which with second contact surfaces 27 (numbered here only by way of example) of the box part 10 (please refer 3 ) Soldering areas 28 the collection boxes 21 can train. For this purpose, the first contact surfaces 26 and the second contact surfaces 27 be provided in a suitable and known manner with solder (not numbered here).

At each of the first contact surfaces 26 of the tube bottom 9 are contact securing pins 29 of funds 30 for contact protection of the collection boxes 21 arranged. Accordingly, the second contact surfaces 27 with contact securing hubs 31 in the form of through holes 32 the means 30 equipped for contact security. The means 30 For contact assurance, in particular in this exemplary embodiment, therefore, on the one hand, the contact securing pins 29 and on the other hand the contact securing hubs 31 ,

Is the box part 10 in the tubesheet 9 according to the 4 to 6 properly inserted, are the contact pins 29 of the tube bottom 9 in the contact backup hubs 31 of the box part 10 arranged advantageously, in such a way that the contact securing pin 29 the contact securing hubs 31 in the shape of the through holes 32 can pierce, as particularly well after the representations of the 7 and 8th is recognizable.

Because the contact pins 29 the second contact surfaces 27 of the box part 10 can penetrate the existing means 30 for securing contacts at the same time solder initiation formations 33 out, by means of which always a contact area 34 if only a small contact area, between the first contact surfaces 26 and the second contact surfaces 27 is trained. This is true even if areas of the first contact surfaces 26 and second contact surfaces 27 not touching each other.

This is because the contact pins 29 in this embodiment, surveys 35 within the first contact areas 26 and the contact backup hubs 31 Reduce 36 within the second contact surfaces 27 form.

This arrangement of the surveys alone 35 and sinks 36 each other already requires a very good contact protection of the first contact surfaces 26 and the second contact surfaces 27 to each other, so that in the soldering areas 28 reliable always very good solder joints can form, which in turn the collection boxes 21 Overall, they are very pressure-stable and, moreover, are characterized by a high bursting pressure.

Be the means 30 to secure contact, in particular related surveys 35 and sinks 36 additionally positively connected with each other by the contact-securing pins 29 with the contact securing hubs 31 Be pressed, is a particularly intimate touch of the first contact surfaces 26 and the second contact surfaces 27 guaranteed (see in particular 6 to 8th ).

Here are also pressed and thus particularly strong pin-hub connections 37 by means of means 30 for contact protection at the collecting boxes 21 provided.

So especially in the longitudinal partition wall area 25 the collection boxes 21 despite the means 30 enough contact surfaces to secure the contact 26 and 27 for forming the solder areas 28 are available, are the means 30 to secure contact at a distance 38 (Exemplarily only with regard to the 6 located) spaced from each other.

Especially if the means 30 can be pressed to secure contact, can alternatively on the Vorfixierlaschen still provided here in this embodiment 23 be dispensed with, so that the collecting boxes 21 structurally even easier to construct.

1

Heat exchanger

2

radiator core

3

Cooling water inlet box

4

Cooling water drain box

5

Cooling water pipes

6

Fins waves

7

cooling fins

8th

holding web

9

tube sheet

10

box part

11

seam

12

top

13

first shutter

14

bottom

15

Another shutter

16

Cooling water inlet

17

Cooling water outlet

18

right angle

19

longitudinal extension

20

by trains

21

collection boxes

22

elongated margins

23

Vorfixierlaschen

24

central axis

25

Longitudinal partition area

26

first contact surfaces

27

second contact surfaces

28

solder bumps

29

Contact security bolts

30

medium for contact security

31

Contact securement hubs

32

Through holes

33

Lötinitialisierungsgebilde

34

contact areas

35

surveys

36

Reduce

37

Pin-hub connection

38

distance

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10315371 A1 [0003]
• DE 102004037688 A1 [0004]
• US 2003/0159813 A1 [0005]

Claims (12)

Collecting box ( 3 . 4 . 21 ), in particular a heat exchanger ( 1 ) of a motor vehicle, with a tubesheet ( 9 ) comprising first contact surfaces ( 26 ), with a box part ( 10 ) comprising second contact surfaces ( 27 ), in which the tubesheet ( 9 ) and the box part ( 10 ) at soldering areas ( 28 ) are soldered together, and wherein the first contact surfaces ( 26 ) and the second contact surfaces ( 27 ) the soldering areas ( 28 ), characterized by means ( 30 ) for contact securing, by means of which in the soldering areas ( 28 ) a critical removal of the contact surfaces ( 26 . 27 ) is prevented from each other. Collecting box ( 3 . 4 . 21 ) according to claim 1, characterized in that the means ( 30 ) for securing contact on a longitudinal dividing wall area ( 25 ) of the collecting tank ( 3 . 4 . 21 ) are arranged. Collecting box ( 3 . 4 . 21 ) according to claim 1 or 2, characterized in that the means ( 30 ) for contact protection within the soldering areas ( 28 ) are arranged. Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that the means ( 30 ) for contact-securing solder initiation structures ( 33 ) exhibit. Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that the means ( 30 ) for contact security surveys ( 35 ) within the first contact surfaces ( 26 ) and / or the second contact surfaces ( 27 ) exhibit. Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that the means for securing contact sinks ( 36 ) within the first contact surfaces ( 26 ) and / or the second contact surfaces ( 27 ) exhibit. Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that surveys ( 35 ) of funds ( 30 ) for contact security and lowering ( 36 ) of funds ( 30 ) are positively connected with each other to secure contact. Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that the means ( 30 ) to secure contact a pin-hub connection ( 37 ) exhibit. Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that the means ( 30 ) for securing the tube bottom ( 9 ) or the box part ( 10 penetrate). Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that the means ( 30 ) for securing contact along a longitudinal axis ( 24 ) of the collecting tank ( 21 ) are arranged spaced from each other. Collecting box ( 3 . 4 . 21 ) according to one of the preceding claims, characterized in that the tubesheet ( 9 ) and / or the box part ( 10 ) Medium ( 23 ) for prefixing. Heat exchanger ( 1 ), in particular condenser, of a motor vehicle with a heat exchanger block ( 2 ) and with collecting boxes ( 3 . 4 . 21 ), in which cooling tubes ( 5 ) of the heat exchanger block ( 2 ) into the collecting boxes ( 3 . 4 . 21 ), characterized by a collecting box ( 3 . 4 . 21 ) according to any one of the preceding claims.