Liquid heating apparatus and method
AssigneeC-Tech Innovation Limited
InventorsMichael Harrison, John Collins, Andrew Rowley
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Abstract
The invention relates to an apparatus for heating an electrically conductive fluid, such as potable water, and to a method of heating the same. The heating apparatus includes a plurality of electrodes in an array, and a controller for selectively energizing the plurality of electrodes, in different combinations, to thereby adjust the electrical resistance observed across the electrode array, in order to maximize the current drawn by the apparatus.
Claims45
A domestic water heater, comprising:
- at least three electrodes for immersion in the water;
- and
- a controller adapted to selectively energise the electrodes in at least two different combinations.
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The apparatus of claim, 1 further comprising a tilt switch arranged to isolate the power supply means from the plurality of electrodes when the tilt switch detects the apparatus is tilted.
An electrode arrangement for use in heating a electrically conductive fluid, said electrode arrangement comprising a first plurality of electrodes, and a second plurality of electrodes, each activated by a switch, whereby activating different ones of the switches results in varying resistances being observed across both pluralities of electrodes.
A method of heating domestic potable water, the method comprising:
- immersing at least three electrodes in the fluid to be heated;
- and
- selectively energising the electrodes in at least two different combinations.
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Dependencies are inferred from the claim text.