Method of making a plate-type heat exchanger
AssigneeLinde Aktiengesellschaft
InventorNorbert Wagner
Life of this patent
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Abstract
Plates of a plate heat exchanger, defining between them a space adapted to be traversed by a heat-exchange fluid, are held together and are soldered in a chamber in which the plates are heated by passing a heating fluid, generally an inert gas, directly through the passages between the plates.
Claims9
A process for the soldering together of a stack of plates defining spaces between them to form a plate-type heat exchanger from the plates and wherein the spaces are formed as a plurality of passages of said heat exchanger running from one side of the stack to another side thereof generally along the plates, said method comprising the steps of:
- holding said plates together in a sealed chamber with solder disposed at junctions between them;
- passing a heating gas directly through said passages by distributing said gas thereto and thereby heating said plates, said heating gas being a gas inert with respect to the solder and said plates and being at a temperature below the melting point of said solder the heating gas traversing said passages before entering the chamber space around the held-together plates;
- thereafter only discharging the heating gas into the chamber space around the held-together plates;
- terminating the flow of gas through said passages;
- heating said chamber to a temperature above the melting point of said solder thereby causing said solder to flow and bond said plates together;
- and
- cooling said plates.
Dependencies are inferred from the claim text.