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(11) | EP 2 336 669 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Heat pump hot water supply apparatus |
| (57) A heat pump hot water supply apparatus comprising a heat pump unit 1 having a water
refrigerant heat exchanger 3 which heats low temperature water, a hot water reservoir
tank unit 10 having a hot water reservoir tank in which high temperature water heated
by the water refrigerant heat exchanger 3 is stored, a water pipe 13 which sends low
temperature water in a lower portion of the hot water reservoir tank to the water
refrigerant heat exchanger 3, and a boiling pipe 12 which sends high temperature water
heated by the water refrigerant heat exchanger 3 to an upper portion of the hot water
reservoir tank, wherein the heat pump unit 1 is placed on a ceiling surface of the
hot water reservoir tank unit 10, and the boiling pipe 12 is shorter than the water
pipe 13. The heat pump hot water supply apparatus can be installed in an environment
having a small installation space such as a detached house or an apartment in an urban
area. A radiation loss from a connecting pipe can be reduced, material cost of the
connecting pipe can be reduced, and the number of man-hours of a piping operation
at the site of installation can be reduced.
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