Heat exchanger core and heat exchanger equipped therewith

Abstract

A heat exchanger network has at least one passage for a coolant and a heat exchanger provided with such a core. The coolant passage has a plurality of flow channels which are disposed in parallel and delimited by separating walls and connected to each other in an undulating shape at their ends by deflection zones. The flow channels are formed by at least one lamella which has separating walls and a meandering cross-section. The deflection zones are formed by recesses which are provided at the ends of the separating walls.

Description

CROSS-REFERENCE TO A RELATED APPLICATION [0001] The invention described and claimed hereinbelow is also described in German Patent Application 20 2005 015 627.2 filed on Sep. 28, 2005. This German Patent Application, whose subject matter is incorporated here by reference, provides the basis for a claim of priority of invention under 35 U.S.C. 119(a)-(d). FIELD OF THE INVENTION [0002] The invention relates to a heat exchanger core comprising at least two plates and a passage disposed between said plates for a coolant, said passage containing a plurality of flow channels which are disposed in parallel and delimited laterally by separating walls, which are disposed perpendicular to the plates, have respectively two ends and are connected to each other in an undulating shape by deflection zones which are provided alternately at the one or other ends of the separating walls. The invention also relates to a heat exchanger comprising such a heat exchanger core. BACKGROUND OF THE INVENTION ...

AI Technical Summary

Benefits of technology

[0007] Starting from the above it is an object of the present invention to configure the heat exchanger core described above such that it can be produced with the required strength when using economical manufacturing methods.

[0009] Yet another object of the present invention is to so design the heat exchanger core mentioned above that comparatively large flow cross-sections for the coolant can be provided within given overall dimensions.

[0013] Due to the application according to the invention of lamellae which respectively form a plurality of flow channels each, the number of welding operations to be implemented before the soldering process can be significantly reduced. In addition, the lamellae can be produced by extrusion or milling and consequently economically with any arbitrary strength. Finally, in principle any arbitrary cross-sectional form can be given to the separating walls and / or to the flow channels delimited by these, which is favourable with respect to the output and stability of the heat exchanger core which is desired in the individual case.

Problems solved by technology

A disadvantage of this construction is that unused spaces are produced between the individual pipe portions and that the curved deflecting portions are generally outwit the space taken up by the actual core and are not involved in the heat exchange.

A disadvantage of this construction is, however, that either comparatively thick strips must be provided in order to produce solder faces being sufficiently large for stable soldering joints, as a result of which reduced flow cross-sections are obtained with the given overall dimensions of the core, or that, if narrow strips are used which enable favourable flow cross-sections, in return comparatively small solder faces must be accepted which are not always adequate for the required strength of the heat exchanger.

Both variants incur, therefore, comparatively high production costs which are not always tolerable.

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