Behr Gmbh & Co.

Mahle International Gmbh

Behr Gmbh Co. Kg

Mahle Behr Gmbh & Co. Kg

Werner Helms

Roland Hemminger

Walter Wolf

Herbert Damsohn

Chi-Duc Nguyen

Hicham Rouhana

Dieter Bauer

Karl Lochmahr

Kurt Hauser

Franco Ghiani

Wilhelm Baruschke

Jens Richter

Reinhard Heine

Volker Kurz

Matthias Banzhaf

Nicolas Ferrand

Jochen Eitel

Stefan Weise

Thomas Strese

Jürgen Hägele

Ralf Bochert

Roland Schirrmacher

Markus Reck

Peter Wolfangel

Johann Ehrmanntraut

Roland Krisa

Juergen Barwig

Karl-Heinz Rothfuss

Herbert Hunzelmann

Timo Gruber

Mithun Pawar

Gerhard Zsiga

A heat exchanger having a tube-fin block that is closed by two collecting tanks, whereby the ends of the tubes engage in a bottom of the particular collecting tank and the bottom is closed with a cover. A partition wall secured to the cover is formed transverse to a longitudinal extension of the collecting tank and divides an interior space of the collecting tank into two subchambers. The heat exchanger, which prevents great structural changes for compensating temperature-induced stresses, a first stress decoupling device is formed in the bottom and/or a second stress decoupling device in the area of the partition wall in the cover of at least one collecting tank.

Heat exchanger

The application relates to a heat exchanger having a block with ribs and rectangular tubes. The block is arranged between a first collecting box and a second collecting box. Each collecting box is closed off by a base which has eyelets for receiving the tubes, and a trough-shaped circulating section for receiving the collecting box extends along the edge of the base. The base has an elevated contact region on at least one end face for the tube which lies directly opposite the end face in order to allow a stable structure of the heat exchanger, collecting boxes, and block.

Heat exchanger with header contact regions for tubes support

The invention relates to a heat exchanger () with tubes () and a collector box (). Said collector box () has a tube-plate () with tube openings () and with angled or rounded lateral regions ().

A method and a device for the draw expansion of metal tubes of oval cross-section uses expansion elements drawn unidirectionally through metal tubes by means of draw elements. The expansion elements are fastened to the draw elements by suspension devices which have a hammer-like contour. The draw elements are preferably made of a rod-shaped material. An apparatus of the invention is an apparatus for mechanically expanding metallic tubes, in particular tubes in heat exchangers. Each individual tube to be expanded is held in at least one holding device and passed through by a drawing mandrel with an expanding element. To prevent jamming of the expanding element in one of the holding devices, the holding devices are provided with lateral guides which are resiliently compliant outward in the radial direction. When the expanding element passes through the metallic tube, the tube is expanded in the radial direction. The forces occurring thereby in the axial direction are absorbed by the holding device, since the tube is seated on a stop in the holding device.

Method and device for expanding metal tubes

The fin for a heat exchanger which consists essentially of a matrix of tubes and of fins disposed transversely to the latter, the fin having pass-through elements to receive tubes which are to be joined mechanically, while a first, preferably liquid medium flows through the tubes and the fin is acted on by a second, preferably gaseous medium. Multiple fins are positioned in their fin pitch by integral spacers, wherein the spacers are in the form of noses stamped out of the pass-through elements and distributed over the periphery of the latter.

Method of forming fins for a heat exchanger

A heat exchanger, produced by the insertion of welded pipes into a rib pack, has a good connection between the rib pack and the pipes after expansion of the pipes. An optimal contact of the pipes against the passages in the cooling fins of the rib pack is achieved because the weld base of the welded pipe lies in a recess. The recess is formed by reduction of the wall thickness of a strip material from which the welded pipe is produced.

Heat exchanger having a welded pipe which has a reduced wall thickness

Fin for a heat exchanger

A heat exchanger, particularly for motor vehicles, including a collecting tank and a metallic tube plate which has a primary side, a secondary side, and collars which are formed on it, and in which collars tubes are to be held and sealed. Neighboring collars (17, 19) are alternately directed towards the primary side (22) and towards the secondary side (23). In other words, collars disposed side by side are alternately formed in the direction of the air side and of the water side, whereby the distance between the collars can be reduced to a minimum.

Heat exchanger, particularly for motor vehicles

A cooling system for a vehicle having an internal-combustion engine has a plurality of cooling circuits with heat exchangers for each circuit. The temperatures of different cooling media are measured and processed in a switching device to form an output signal which serves to control a fan. In this way, the air flow through the heat exchangers can be varied depending on measured temperature conditions. Individual capacity control of each cooling circuit is possible, thereby preventing unfavorable operating conditions in the individual circuits. The cooling capacity demand of the individual cooling circuits is determined by a central control unit which receives signals from temperature sensors in each circuit. The central control unit includes a microprocessor. Each cooling circuit has an actuating means for individually controlling the capacity of the relevant heat exchanger.

Cooling system for a vehicle having an internal-combustion engine

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Esslingen, Germany

Werner Helms