Hybrid water heater with electrical heating unit and combustor
AssigneeDenso Corporation
InventorsHidemine Murahashi, Satoshi Nomura
Life of this patent
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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.
Claims17
A hybrid water heater for supplying hot water to a hot-water supply equipment, comprising:
- a hot water tank;
- an electrical heating unit for heating water to be stored in the hot water tank;
- and
- a combustion heating unit for heating water to be stored in the hot water tank, the combustion heating unit including
- a combustor for heating water by combustion operation, and
- a chamber in which water is heated by the combustion operation of the combustor, the chamber having a first water port at an upper side, through which heated water flows from the chamber into an upper side in the hot water tank, and having a second water port at a lower side, through which water at a lower side in the hot water tank flows into the chamber,
- wherein the hot water tank and the chamber are disposed to communicate with each other through the first water port and the second water port, in such a manner that the water heated in the chamber is stored in the hot water tank at the upper side using natural convection due to a temperature increase of the water in the chamber.
Dependencies are inferred from the claim text.