Liquid or gas heater - has surface of tubular heater body bearing against casing via components allowing for different coefficients of expansion

摘要

One or more heater bodies (12), parallel to the lengthwise axis of the casing (19) containing the medium to be heated, are joined to it. Each tube (12a) is made of material having a greater coefficient of expansion than that of the casing wall (10a). Each body bears against the casing wall via a surface (12e) containing components (14) allowing for the difference between the coefficients of expansion, typically formed by grooves cut in the surface. These can run diagonally in an intersecting pattern. They can form expansion joints at right angles to the tube axis. The tubes can be soldered to the casing, or alternatively flat sheet-metal components of good heat conductivity can be used, such as aluminium, passing round the tube and casing. USE/ADVANTAGE - Compact liquid or gas heater which gives high heat output.