| 摘要 |
A heat exchanger for heat transfer between two mediums comprises a tubular shell (10) and a finned tube (11) provided in the shell. One medium flows in the shell, and the other medium flows in the finned tube. The shell is divided into two chambers (13, 14), provided on either side of the finned tube, so that the medium flowing through the shell enters into the first chamber (13) which is positioned above the second chamber (14) and then flows downwards between the fins (12) into the second chamber (14). The shell has an elongate cross section, the fins of the tube abutting two opposite walls of the shell. The position of the tube within the shell can change along the length of the shell. The heat exchanger is intended for condensation of vapour, e.g. in connection with heat pumps. Vapour is then fed into the shell, and a cooling medium is fed into the tube. The flowing vapour promotes the discharge of the condensate from the fins. In one embodiment, the shell is wound to an upright coil in which the condensate is collected at the lower end of the coil. |
