| 摘要 |
A heat exchanger for flowing media with passages for two media to be heated/cooled arranged within a casing (1) and separated by heat transmission surfaces. Within a closed, oblong casing of preferably circular cross-section there is, in coaxial arrangement, an inner tube (15) the diameter of which is considerably smaller than that of the casing. The tube has an inlet (27) leading from outside and located at one (the first) end of the casing and an outlet at the other, opposite end of the casing, directly connected with the inside of the casing. An outer tube (11) the diameter of which is considerably larger than that of the inner tube and considerably smaller than that of the casing is also provided within the casing. The intermediate space (23) between the two tubes (11, 15) is at one of the two ends provided with an inlet (28) and an outlet (29), separately arranged, and is closed at the other end. The intermediate space (32) between the outer tube and the casing is closed at one end and two helical baffles are arranged in sequence within the intermediate space between the tubes so as to constitute two helical passages (20, 21) connected respectively with the said inlet and outlet. The baffles extend from the end wall of intermediate space (23) comprising the said inlet and outlet, respectively whereas the opposite ends of the baffles terminate at a distance from the opposite end of the intermediate space so that the two helical passages pass into one another at the latter end (22). The casing is provided with a drainage outlet (8). |
