| 摘要 |
An apparatus for heating an electrically conductive liquid, such as water, includes a rotatable, balanced, buoyant heating assembly floating in a quantity of conductive liquid partially filling a tank. A pair of opposite polarity electrodes are mounted on the buoyant assembly and a neutral electrode is mounted in the liquid in the tank for heating the liquid by current flow between the electrodes. The buoyant heating assembly is hingedly mounted in the tank and is rotatable by means of a bimetallic coil responsive to the temperature of the liquid from a first position, wherein the pair of electrodes is immersed in the liquid to heat the liquid, to a second position, wherein the electrodes are out of the liquid to terminate the heating process. In one embodiment the spacing between the electrodes on the buoyant heating assembly may be selectively adjusted from outside of the tank to vary the heating rate.
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