DE10312032A1 - Collecting box, heat exchanger and method for producing a collecting box - Google Patents

Abstract

The invention relates to a collecting box (1) with at least one tie rod (2), wherein the tie rod (2) is formed by a rivet, a screw or a bolt whose tensile forces are at least partially taken up by an element arranged in the interior of the collecting box (1) become.

Description

The invention relates to a collecting box, in particular for a Motor vehicle, according to the preamble of claim 1, a heat exchanger according to the generic term of claim 10 and a method for producing a collecting box.

Conventional, injection molded plastic charge air boxes, the high loads, namely high temperatures and high pressures are, are frequent designed in areas with particularly high stresses with tie rods, the one connection from one wall to the other of the charge air box form. These are usually taken into account in the production form and immediately injection-molded with the intercooler from the same material. This is particularly problematic for tie rods made of plastic, that the tie rods are directly in the hot Air flow, which may have temperatures up to 240 ° C arranged are so much stronger Thermal aging than the areas of the charge air box, the one Cooling through experience the ambient air. Such a charge air box can therefore still wishes open.

So is out of the EP 0 641 985 B1 a heat exchanger tank having a plurality of separately formed from the heat exchanger tank and in recesses extending between opposite walls of the heat exchanger tank, used after the completion of the heat exchanger tank stiffening struts known. In this case, however, the production is relatively complex, so that even such a heat exchanger tank leaves nothing to be desired.

It is an object of the invention to provide a improved collection box or heat exchanger available put.

This task is solved by a collection box with the features of claim 1 respectively through a heat exchanger according to claim 9. Advantageous embodiments are the subject of Dependent claims.

According to the invention, in a collecting box, which consists in particular of plastic, a tie rod provided, which is formed by a rivet, a screw or a bolt. Such a tie rod is easy to manufacture, depending on the design this is possibly even a standard part. There the tie rod in this version is mountable in an otherwise finished collection box, the Production of the collecting tank simplified. For example, at one injection-molded plastic collection box simplifies the injection molding tool, which saves costs can be.

Preferably, the tie rod is in one Hollow profile, in particular in a pipe, arranged, that is, he is inserted through the hollow profile during assembly. The hollow profile can be designed as a guide vane, so that the flow resistance in the Collection box is reduced. A geometric shape of the tie rod can also any other, open profiles are based, for example similar to the profile of a vane. In this case, however, an additional seal of the tie rod required, so that, for example, charge air is not or only in limited Measures after outside.

The hollow profile is in particular by means of one or two sealing elements sealed against the collecting box, so that no further sealing of the openings is required, passed through the tie rods is. The hollow profile takes the excess tensile forces of Tie rod on and prevents contraction of the collecting tank, wherein the sealing elements safely between collecting box and hollow profile are held and an intrusion of, for example, charge air in prevent the interior of the hollow profile.

According to a preferred embodiment An internal thread is provided in the collecting box into which the tie rod is screwed. The internal thread can be a metal insert, which is poured into the collection box. However, also the Reinforced collection box a bit be formed, leaving a screw with a self-tapping Thread can be screwed directly into the wall.

According to a preferred embodiment an inventive collection box in a heat exchanger used, the heat exchanger Having tubes which can be traversed by a first medium and flowed around by a second medium are so that heat from the first to the second medium or vice versa can take place. The Tubes communicate with the at least one collection box, so that first medium distributed in the collecting box on the pipes or from the pipes collected in the collecting box. For an enlargement of the heat transfer surface can while ribs, for example in the form of corrugated fins, between the Pipes arranged and in particular be soldered to the pipes.

In the following the invention with reference to two embodiments partially explained with reference to the drawings. In the Drawing shows the single figure a section through a collecting box according to the invention, which is designed as a charge air box of a charge air cooler, with a tie rod.

The collection box 1 , which is usable as a charge air box in a motor vehicle, for example, consists of polyamide. The collection box 1 , which is open at the bottom and closable with a so-called tube plate communicates through openings in the tubesheet with heat exchanger tubes, which in turn are inserted into the openings and optionally soldered to the tube sheet. Clearly visible is a connecting piece 6 , which serves to supply or discharge of charge air. Furthermore, a tie rod 2 to increase the stability of the charge air box 1 provided to a deformation of the header tank 1 to reduce at internal pressure.

During production, the collecting box 1 injection-molded without plastic tie rods. For further processing is a hollow profile 3 , in this case a tube, with sealing elements 4 at both ends into the collection box 1 inserted. In the side walls of the collecting tank 1 be two holes in the longitudinal axis of the hollow section 3 introduced, for example by drilling or preferably by molding during injection molding, by a as a tie rod 2 serving blind rivet is introduced. For this purpose, the rivet through the two holes and the hollow profile 3 pushed, a washer 5 pushed over the free end and formed the head.

According to another, not in the figure illustrated embodiment a threaded insert is cast in one of the walls of the collecting tank, in which a screw serving as a tie rod is screwed. In this case, a guide-blade-shaped hollow profile with sealing elements as well a washer for provided the screw head. Instead of a threaded insert, the reinforced corresponding wall area be formed and a screw with a self-tapping Thread to be used.

1

Charge-air tank

2

tie rods

3

hollow profile

4

sealing element

5

washer

6

Support

Claims (14)

Collection box for a heat exchanger, with at least one tie rod ( 2 ), wherein the collecting tank is in particular made of plastic, characterized in that the tie rod ( 2 ) is formed by a rivet, a screw or a bolt. Collecting box according to claim 1, characterized in that the tie rod ( 2 ) in a hollow profile ( 3 ) is arranged. Collecting box according to claim 2, characterized in that the hollow profile ( 3 ) is a tube or a guide vane-like hollow profile. Collecting box according to claim 2 or 3, characterized in that the collecting box ( 1 ) relative to the hollow profile ( 3 ) is sealed. Collecting box according to one of the preceding claims, characterized in that a sealing element ( 4 ) between collection box ( 1 ) and hollow profile ( 3 ) and / or collecting box ( 1 ) and tie rods ( 2 ) is inserted. Collecting box according to one of the preceding claims, characterized in that a washer ( 5 ) on the outside of the collecting tank ( 1 ) is provided. Collecting box according to one of the preceding claims, characterized characterized in that an internal thread on one side of the collecting tank is provided in the interior thereof, in which screwed the tie rods is. Collecting box according to one of claims 2 to 7, characterized in that the hollow profile ( 3 ) under a compressive stress as a result of a tension anchor ( 2 ) resistant tensile stress is. Collecting box according to one of the preceding claims, characterized characterized in that the tie rod at least one receptacle, in particular a Screw thread, having a fastening means, in particular a screw, from the outside through an opening engages in the collection in the receptacle. Heat exchanger, in particular intercooler for a Motor vehicle, with at least one collecting box and heat exchanger tubes, the heat exchanger tubes communicate with the at least one collection box, characterized in that at least one collecting box is designed according to one of the preceding claims is. Method for producing a collecting box according to one of the preceding claims, characterized in that the tie rod ( 2 ) after completion of the collecting tank ( 1 ) is introduced and clamped in the same, wherein an element for absorbing tensile forces of the tie rod ( 2 ) in the collecting box ( 1 ) is provided. Method according to claim 9, characterized in that the tie rod ( 2 ) by a hollow profile ( 3 ) to be led. A method according to claim 9 or 10, characterized in that the element for absorbing tensile forces of the tie rod ( 2 ) is injected into the collecting box, inserted or clamped. A method according to claim 9, 10 or 11, characterized in that at least one end of the element for receiving tensile forces and / or at least one end of the tie rod ( 2 ) one sealing element each ( 4 ) is attached.