| 摘要 |
<p>A heat exchanger with several coaxial pipes (1, 2, 3, 4) and distribution heads (8, 45) that clamp between them the pipes, holding their extremities and providing a connection with the heat exchange medium. The distribution heads (8, 45) sealingly connect the front side of the pipes (1, 2, 3, 4) with the heat exchange medium and axially clamp them. Each distribution head (8, 45) has two concentric walls (9, 10, 46, 47) and a front chamber (17, 50) comprising the annular space (11, 48, 49) formed between the walls. The outer wall (9, 46) is linked with the outer pipe (1) and the second pipe (2) inside the outer pipe (1) is inserted within the inner wall (10, 47) against an axial stop (24). Furthermore, the pipe (3) arranged inside the second pipe (2) is clamped against an axial stop (28) of the inner wall (10, 47) on the inner side of the front chamber (17, 50) by a sleeve (26, 58, 59) linked to its extremity. The inside (34) of the sleeve (26) communicates through an opening (19, 55) with the front chamber (17, 50). A connection between a first heat exchange medium and the annular space located between the inner wall (10, 47) and the sleeve (26) is effected by a radial outlet cross section (15) of the distribution head (8, 45), whereas a connection with another heat exchange medium is effected via an opening (18) in the front chamber (17, 50).</p> |
