Heat exchanger and method of making heat exchangers
AssigneeAkzo N.V.
InventorHermann Gemeinhardt
Life of this patent
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Abstract
A heat exchanger comprises at least one group of tubes of thermoplastic synthetic material, the tube ends of a group being packed closely together and the tube ends of adjacent tubes being fused to one another on their end face. Preferably, the tube ends are arranged in a sleeve enclosing the group of tubes, the external tube ends being fused with the sleeve. The heat exchangers are made in such a way that the tube ends are assembled together and inserted into a sleeve. The tubes are placed in vertical position, with their ends essentially upward. Heat is then supplied to the tube ends from above, causing the tube ends to expand and occasionally to fuse with the sleeve.
Claims10
A heat exchanger comprising at least one group of tubes of thermoplastic synthetic material, wherein tube ends of said group of tubes are packed closely together and the ends of adjacent tubes are fused to one another at their end faces, said heat exchanger being produced by a process comprising placing said tube ends of said group of tubes in a sleeve such that the tube ends are in a substantially upward vertical position, are closely packed together, and form a substantially flat surface;
- from a position above said tube ends, applying sufficient radiant heat to said tube ends to cause them to soften and their outer walls to expand against and fuse with the outer walls of adjacent tube ends, to form a uniform face seal at said fused end faces.
Dependencies are inferred from the claim text.