EP 0387678 B1 19931124 - Heat exchanger and process for the watertight fixation of heat exchange elements to an end plate.
Title (en)
Heat exchanger and process for the watertight fixation of heat exchange elements to an end plate.
Title (de)
Wärmeaustauscher und Verfahren zur flüssigkeitsdichten Befestigung einer Bodenplatte an einem Wärmeaustauschernetz.
Title (fr)
Echangeur de chaleur et procédé pour la fixation étanche des éléments d'échange dans une plaque d'extrémité.
Publication
Application
Priority
DE 3908266 A 19890314
Abstract (en)
[origin: EP0387678A1] The invention relates to a heat exchanger comprising a heat exchanger grid having a multiplicity of oval tubes (3), and a baseplate attached to said grid by widening the tubes (3). The ratio of the diameters of the tubes (3) is 2.5 : 1 to 8 : 1 inside the heat exchanger grid, and 1.2 : 1 to 3 : 1 inside the perforations of the baseplate. A process for fixing such heat exchanger grids to a baseplate is also described. This process is characterised in that before being widened the tube ends are deformed from outside by applying pressure with the aid of a special pressure tool (15, 15a,b), with the result that their cross-sections are reduced parallel to the maximum diameter but increased, by contrast, parallel to the minimum diameter. <IMAGE>
IPC 1-7
IPC 8 full level
B23P 21/00 (2006.01); B21D 39/20 (2006.01); B21D 53/08 (2006.01); F28D 1/053 (2006.01); F28F 1/02 (2006.01); F28F 1/32 (2006.01); F28F 9/16 (2006.01)
CPC (source: EP KR US)
B21D 39/20 (2013.01 - EP US); B21D 53/085 (2013.01 - EP US); F28D 1/05366 (2013.01 - EP US); F28F 9/165 (2013.01 - EP US); F28F 11/00 (2013.01 - KR); Y10T 29/49373 (2015.01 - EP US); Y10T 29/49375 (2015.01 - EP US)
Citation (examination)
- DE 3505492 A1 19860821 - THERMAL WAERME KAELTE KLIMA [DE]
- US 4739828 A 19880426 - BAYER JUERGEN [DE], et al
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0387678 A1 19900919; EP 0387678 B1 19931124; AT E97734 T1 19931215; CA 2012043 A1 19900914; CA 2012043 C 20000613; DE 3908266 A1 19900920; DE 59003568 D1 19940105; DK 0387678 T3 19940207; ES 2048877 T3 19940401; JP 3198385 B2 20010813; JP H02279991 A 19901115; KR 0144564 B1 19980801; KR 900014849 A 19901025; US 5101561 A 19920407
DOCDB simple family (application)
EP 90104324 A 19900307; AT 90104324 T 19900307; CA 2012043 A 19900313; DE 3908266 A 19890314; DE 59003568 T 19900307; DK 90104324 T 19900307; ES 90104324 T 19900307; JP 6248590 A 19900313; KR 900003376 A 19900314; US 49346590 A 19900314