The invention discloses a
heat pump water heater. The
heat pump water heater comprises a water tank, a
heat pump unit, a high-temperature water outlet pipeline, a medium-temperature water outlet pipeline, a water supplementing pipeline, a water inlet pipeline, an a heat preservation pipeline. A heat pump water outlet communicates with the water tank, hot water is supplied to the top of the water tank, the high-temperature water outlet pipeline is mounted at the position, close to the upper, of the water tank, the medium-temperature water outlet pipeline is arranged at the position, close to the middle, of the water tank, the water supplementing pipeline is arranged on the position, close to the lower, of the water tank, the water inlet pipeline communicates with a heat pump water inlet, one end of the heat preservation pipeline communicates with the water tank, the other end of the heat preservation pipeline communicates with the heat pump water inlet, when the
water level is lower than the low
water level, the water supplementing pipeline and the water inlet pipeline both enter water, the heat preservation pipeline is closed, when the
water level is higher than the high water level, the water supplementing pipeline and the water inlet pipeline are closed, water in the water tank flows to the heat pump water inlet through the heat preservation pipeline, when the water level isbetween the low water level and the high water level, the water supplementing pipeline is closed, and the water in the water tank flows to the heat pump water inlet through the heat preservation pipeline. Natural layering of water in the water tank is used, high-temperature water is taken from the top of the water tank, the
warm water is taken from the middle, the needs of the different water temperatures by a user are met, and the use experience of the
heat pump water heater can be improved.