Hot water supply system, hot water supply device and control method for hot water supply system

摘要

Problem to be solved: to obtain a hot water supply system capable of effectively utilizing the quantity of heat stored in the bath water by energy saving.A hot water supply system 1000 according to one aspect of the present disclosureStorage tank 10 storing tank waterBathtub 200 for storing bath waterA bath heat exchanger 11 for exchanging heat between bath water and tank waterThe controller 14 controls the flow rate of the tank water flowing into the heat sink 11 for bathEquipped withThe control part 14 causes the tank heat exchanger 11 to flow into the bath heat exchanger 11 to perform heat recovery operation by heating the tank water by the bath heat exchangerIn the case where the heat recovery operation is being performed, the control unit 14 stops the heat recovery operation when the value of the tank water is subtracted from the temperature of the bath water to a predetermined value or lessWhen the heat recovery operation is stopped and the condition that the tank water can be heated by the bath water is satisfied, the control unit 14 restarts the heat recovery operation.Diagram