WATER BOILING APPARATUS Russian patent published in 2007 - IPC A47J27/00 F24H1/10 

FIELD: potable water thermal treatment technique, preferably, electric appliances such as electric thermoses.

SUBSTANCE: water boiling apparatus has reservoir for water to be heated and heating means. Inner surface of reservoir is equipped with at least one means adapted for creating vortex flow of water heated in reservoir and made in the form spiral member preliminarily fabricated or fastened to reservoir inner surface and extending at least in upper part of water column while protruding above water surface level within filled reservoir. Inner surface of reservoir may be made metal. Heating means may include at least one heating member fixed on vertical surface of reservoir. Spiral member may be formed from silver.

EFFECT: increased efficiency in providing regulated displacement of water flows during boiling.

4 cl, 1 dwg