Water heater with inner- and outer tank - has intermediate helical connection rail, to generate helical heating medium flow

摘要

The inner- and outer container, of the water heater has feed and outlet connections. Intermediate elements are located around the inner container, to generate a helical flow of the heating medium. The inner container (2) has a corrosion-proofed resp. enamelled internal surface, and a cylindrical section (1) with a vertical helical rail (4). The ends (5,5') of the rail are fastened to webs (6) on the inner container. The cylindrical section (7) of the outer container (8) is tensioned over the helical rail. The longitudinal edge of the cylindrical section is offset, for connection to the other longitudinal edge. The space between the containers is divided into separate chambers, each with feed- and outlet connections (13,14).