METHOD AND APPARATUS FOR SUPPLYING HOT WATER BY CONTROLLING THE NUMBER OF PULSES APPLIED TO A HEATER
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United States of America Patent
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Issued Date -
Sep 6, 2012
app pub date -
Sep 30, 2010
filing date -
Nov 17, 2009
priority date (Note) -
Abandoned
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Abstract
There is provided a warm water supply device for controlling the number of voltage pulses applied to heaters, including: a first heater configured to have a first pre-set capacity, provided at a water inlet, and heating water introduced through the water inlet; a second heater configured to have a second pre-set capacity greater than that of the first pre-set capacity, provided at a water outlet, and heating water introduced through the water outlet; and a controller calculating a first heater driving period and calculating a second heater driving period according to a water temperature introduced through the water inlet and a set heating water temperature discharged through the water outlet by using a zero crossing control scheme, and driving the first and second heaters by controlling the number of voltage pulses applied to the first and second heater according to the heater driving periods, respectively.
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