| 摘要 |
Pipeline (1) for a fluid medium to be tempered, preferably for urea solution to be tempered, comprises an inner tube (3) for the fluid to be tempered for a fluid medium or fluid heating medium, where inner tube is surrounded by an outer tube (7) and extends parallel to outer tube. At least one duct is arranged between inner tube and outer tube for fluid heating medium or fluid medium. The assembly of inner tube and outer tube is produced by co-extrusion. At least one co-extruded outer tube is provided, where the assembly of inner tube and outer tube is disposed in an outermost tube (8). Pipeline (1) for a fluid medium to be tempered, preferably for urea solution to be tempered, comprises an inner tube (3) for the fluid to be tempered for a fluid medium or fluid heating medium, where the inner tube is surrounded by an outer tube (7) and extends parallel to the outer tube. At least one duct is arranged between the inner tube and the outer tube for the fluid heating medium or for the fluid medium to be tempered. The assembly of the inner tube and the outer tube is produced by co-extrusion. At least one co-extruded outer tube is provided, where the assembly of the inner tube and outer tube is disposed in an outermost tube (8). The outer tube extends in the longitudinal direction of the unit and parallel to the assembly, where at least one outer conduit for the fluid heating medium is disposed between the outer tube and the outermost tube. The fluid medium to be tempered is accommodated or flows into the inner tube, and the fluid heating medium is accommodated or flows into conduit between the inner tube and the outermost tube. The heating medium initially flows through at least one duct between the inner tube and outermost tube in a first direction along the pipeline, and a deflecting region is provided for deflecting the heating medium into at least one outer conduit between outer tube and the outermost tube. The heating medium flows through at least an outer conduit in a second direction opposite to the first direction along the pipeline. |
