| 摘要 |
A delivery pipe for a flowing medium, such as air, which pipe consists of a sheet metal strip (2) which is bent spirally in the form of a tube (1) and whose longitudinal edges are joined to form a spiral joint (3). The sheet metal strip has a groove (4) in the longitudinal direction of the strip, which groove forms a housing (6) running spirally around the tube for a heat transfer medium, such as liquid (7). The delivery pipe forms a heat exchanger of simple design, in which the sheet metal strip serves as a heat transfer surface between the medium flowing in the tube and the medium flowing in the housing. In the method for producing the delivery pipe, a flexible tube for a heat transfer medium is guided into the groove in the sheet metal strip before the sheet metal strip is bent and joined. <IMAGE>
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