Patent ID: 9557076
Date: 2017-01-31
CPC Classifications: F24H

Claim:
1. A hot water supply apparatus, comprising: a heat exchanger configured to heat passing water by means of a heat quantity generated by a heat source mechanism; a temperature detector arranged on a downstream side of said heat exchanger; a flow rate detector for detecting a passing flow rate of said heat exchanger; and a control apparatus for controlling at each predetermined control cycle the heat quantity generated by said heat source mechanism based on a tapping temperature detected by said temperature detector and a set temperature of the tapping temperature, said control apparatus including: a temperature estimating unit for estimating for each of said control cycle a compensation temperature for compensating for a detection lag of a tapping temperature by said temperature detector with respect to an output temperature of said heat exchanger; and a feedback control unit for setting a requested heat quantity generation to said heat source mechanism based on a temperature deviation which is calculated by correcting a deviation between a tapping temperature detected by said temperature detector and said set temperature with use of said compensation temperature, said temperature estimating unit being configured to set a time constant of a first order lag of a change in said compensation temperature with respect to a change in said requested heat quantity generation in accordance with said passing flow rate detected by said flow rate detector, and calculate said compensation temperature for a next control cycle based on said compensation temperature, said requested heat quantity generation, and said set time constant which are at a present control cycle.