COFFEE MAKING MACHINE WITH AUTOMATIC REMOVAL OF THE SCALE

摘要

PHN. 8631. The invention relates to an electrical heating apparatus for water, comprising a heating chamber and an electric heating element, as is for example generally employed in domestic appliances such as coffeemakers. The construction in accordance with the invention serves to mitigate the problem of scale deposit on the wall of the heating chamber and for this purpose comprises an automatic device for temporarily raising the temperature of the wall to the decomposition temperature of scale, whilst the wall is manufactured of a material which can withstand this temperature, such as for example quartz-glass.