| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type hot water supply apparatus allowing increase of energy efficiency by effectively using hot water in an intermediate part inside a hot water supply tank. <P>SOLUTION: This heat pump type hot water supply apparatus has: a heat pump refrigerant circuit X using carbon dioxide as a refrigerant; and a hot water-supplying water circulation circuit N circulating water in a bottom part inside the hot water supply tank through a refrigerant-water heat exchanger to heat it, and returning hot water heated by the refrigerant-water heat exchanger to a top part of the hot water supply tank to store it in the hot water supply tank. The heat pump type hot water supply apparatus is provided with a top part hot water discharge line 40 for taking out high-temperature hot water in the top part inside the hot water supply tank, and an intermediate part hot water discharge line 33 for taking out intermediate-temperature hot water in the intermediate part inside the hot water supply tank, and is formed with a juncture part G making the top part hot water discharge line and the intermediate part hot water discharge line join each other. Hot water after passage of the juncture part and city water supplied from a city water line 62 are mixed by a mixing control valve 57 provided on the downstream side of the juncture part to supply it to a use part. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
