WATER HEATER OR STEAM GENERATOR

摘要

The invention relates to a water heater (2) or steam generator comprising a chamber (4) which is divided into two parts (5, 6) that are formed, for example, by drawing. The aforementioned chamber contains a heating body (8) having a main spiral part (10) and two end parts (11, 12) which pass through two circular openings in said chamber. The two end parts are welded to the chamber using a laser beam, such as to produce a continuous weld bead that ensures that the heating body is fixed mechanically and the water heater or steam generator is effectively sealed. For said purpose, a collar (18) is provided on the periphery of each opening. In addition, said collars are equipped with a flared edge (28) to ensure that the two parts of the chamber are welded together effectively.