Method for producing a plate heat exchanger using two welds, and a corresponding plate heat exchanger
AssigneeLinde Aktiengesellschaft
InventorsHerbert Aigner, Georg Wimmer, Richard Wimmer
Life of this patent
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Abstract
A method for producing a plate heat exchanger and the plate heat exchanger, particularly a soldered aluminium plate heat exchanger. In the method, a heat exchanger block is provided having a plurality of partition plates and edge strips arranged between the partition plates. A connection device is provided to be mounted on the heat exchanger block. A planar region for securing the connection device to the heat exchanger block is provided with at least one welded weld bead by means of a first weld. The connection device is welded onto the weld bead by means of a second weld. The welding method used for the first weld is a friction stir welding method.
Claims10
A method for producing a plate heat exchanger, said method comprising in which:
- providing a heat exchanger block comprising a number of parting sheets and edge bars arranged in between,
- providing a connection device to be attached to the heat exchanger block,
- providing at least one welding bead by means of a first welding on a planar region intended for fixing the connection device to the heat exchanger block, and
- welding the connection device onto the welding bead by means of a second welding,
- wherein the first welding is formed by friction stir welding and said first welding is performed only to the extent sufficient to remove brazing inhomogeneities down to a depth of 5 mm.
Dependencies are inferred from the claim text.