Importance

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Abstract

A heat exchanger for exchange of heat between two liquid media, of which at least one medium is contaminated and/or readily gives rise to deposits or coatings, such as e.g. contaminated water, includes two flow chambers mutually separated by a common liquid-impervious partition wall (1). The partition wall is tubular with a substantially circular cross-sectional and open ends forming respectively an inlet (2) and an outlet (3) for a first media. The partition wall is surrounded by a cylindrical sleeve-like outer wall (4) extending coaxially with the partition wall in spaced relationship therewith, and having its axial ends sealingly connected to the partition wall (1), and provided with an inlet (5) and an outlet (6) for the second medium so as to define a flow chamber for the second medium. At least the major part of the sleeve-like outer wall (4) is elastically flexible. This flexibility allows the dimension of the flow chamber to vary with changes in volumetric flow, thereby counter-acting blocking tendencies. The outer wall (4) can also be manipulated manually to loosen blockages. It also gives freeze protection.

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First Claim