Tube bottom and heat exchanger

Patent metadata

Field	Value
Publication number	US-2017122680-A1
Application number	US-201715407519-A
Country	US
Kind code	A1
Filing date	Jan 17, 2017
Priority date	Jul 15, 2014
Publication date	May 4, 2017
Grant date	—

Abstract

A tube bottom for a heat exchanger, with a bottom region having slot-type openings, wherein the slot-type openings are rimmed by eyelets and the tube bottom has an attached rim region. Formed between the eyelets and the attached rim region is a U-shaped trough as a receiving region for the foot of a box-like cover. The U-shaped trough has an inner first wall, the attached rim region and a second wall forming the trough bottom, wherein the inner first wall has at least one hump-like raised portion in the continuation of an eyelet on a side oriented toward the U-shaped trough, which bounds the breadth of the U-shaped trough between the attached rim region and the first wall and extends from the trough bottom to that end region of the eyelet oriented toward the U-shaped trough. A depression is formed in the hump-like raised portion.

First claim

What is claimed is:

1 . A tube bottom for a heat exchanger, the tube bottom comprising:
a bottom region with slot-type openings rimmed by eyelets, the tube bottom having an attached rim region; and a U-shaped trough formed between the eyelets and the attached rim region as a receiving area for the bottom of a box-like cover, the U-shaped trough being formed by an inner first wall, the attached rim region and a second wall forming a trough bottom, wherein the inner first wall has at least one hump-like portion in an extension of an eyelet on a side facing the U-shaped trough, which bounds a breadth of the U-shaped trough between the attached rim region and the first wall and extends from the trough bottom to the end region of the eyelet facing the U-shaped trough, and wherein a depression is formed in the hump-like portion as a lead-in chamfer for tubes.

2 . A tube bottom according to claim 1 , wherein a displacement of the material towards the side of the first wall facing away from the U-shaped trough is formed by the molded-in depression.

3 . A tube bottom according to claim 1 , wherein a deflection of the hump-like portion from the inner wall increases from the trough bottom towards the respective eyelet.

4 . A tube bottom according to claim 1 , wherein the hump-like portion extends into the bottom region and at least partly surrounds the eyelet.

5 . A tube bottom according to claim 1 , wherein the first wall has a lead-in chamfer on its side facing away from the U-shaped trough, wherein the lead-in chamfer is arranged on the hump-like portion and the lead-in chamfer creates a tapering of the slot-type openings rimmed by the eyelets.

6 . A tube bottom according to claim 5 , wherein the lead-in chamfer is formed on the molded-in depression.

7 . A tube bottom according to claim 5 , wherein the slot-type openings have two opposing narrow sides and two opposing wide sides, wherein a slot-type opening is tapered by lead-in chamfers on the narrow side and on the end regions of the wide sides facing the narrow side.

8 . A tube bottom according to claim 1 , wherein the hump-like portion and/or the depression is impressed into the tube bottom in the hump-like portion or molded in by thermoforming.

9 . A tube bottom according to claim 1 , wherein the first wall and the surface of the hump-like portion oriented to the U-shaped trough are directed towards the trough bottom at an angle of more than 90 degrees.

10 . A tube bottom according to claim 1 , wherein the surface of the hump-like portion facing the U-shaped trough provides a centering aid for inserting the box-like cover into the U-shaped trough.

11 . A heat exchanger with two tube bottoms according to claim 1 , wherein the heat exchanger has a plurality of tubes, which are arranged parallel to each other and are accommodated at their ends in each case in an opening of a tube bottom rimmed by an eyelet, wherein the tubes are each inserted in respective openings along the lead-in chamfers, and wherein a box-like cover, which is connected to the respective tube bottom, is inserted into the U-shaped trough of each tube bottom.

Assignees

• Mahle Int Gmbh

Inventors

• Bronner Harald
• Kurz Volker
• Weiss Stefan

Classifications

• F28F9/0226

  with resilient gaskets · CPC title

• F28F9/0224 Primary

  Header boxes formed by sealing end plates into covers (F28F9/0221 takes precedence) · CPC title