Patent ID: 8308936

Claim:
A heat pump type hot water supply device comprising: a heat source side heat pump unit having a heat radiating heat exchanger that condenses refrigerant to radiate heat from the refrigerant; and a hot water supply unit having a water tank that stores water, a water supply pipe that supplies water to the water tank from the outside, a water circulation pipe that communicates with a bottom section and an upper section of the water tank and circulates the water in the water tank from the bottom section to the upper section in a bypassing manner, a heat absorbing heat exchanger that is arranged on the water circulation pipe and connected to the heat radiating heat exchanger of the heat source side heat pump unit so as to absorb heat, and a hot water supply pipe that supplies hot water in the upper section of the water tank to the outside, wherein the water supply pipe is branched into a plurality of water supply paths including a first water supply path and a second water supply path, wherein the first water supply path supplies water supplied from the outside directly to the water tank and the second water supply path supplies water to the water tank after the water quality of the water from the outside is improved by the water quality adjusting unit so as to hardly generate scale, and one of or both of the water supply paths are selectively used according to the water quality of the supplied water, and the heat pump type hot water supply device comprises a scale deposition amount monitor for monitoring the scale deposition amount at a hot water outlet portion of the heat absorbing heat exchanger, and a flow rate controller that adjusts the flow rate of water in the second water supply path such that the scale deposition amount at the hot water outlet portion of the heat absorbing heat exchanger is a predetermined value or less based on a monitor value obtained by the scale deposition amount monitor.