Hybrid water heater with electrical heating unit and combustor
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United States of America Patent
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-
Oct 28, 2003
Grant Date -
Oct 10, 2002
app pub date -
Apr 1, 2002
filing date -
Apr 4, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a hybrid water heater, a heat pump unit and a combustion heating unit are combined for heating water to be stored in a hot water tank. The combustion heating unit includes a combustor for heating water in a chamber by combustion operation. The chamber of the combustion heating unit communicates with the hot water tank through a first water port provided at an upper side of the hot water tank and a second water port provided at a lower side of the hot water tank, so that hot water heated in the chamber flows into the upper side in the hot water tank through the first water port, by using natural convection. Further, water in the hot water tank at the lower side flows from the second water port into the chamber.
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