HOT WATER STORAGE AND SUPPLY DEVICE

To provide a hot water storage and supply device capable of shortening a time required for heating sterilization treatment for hot water in a hot water storage tank where Legionella bacteria proliferate, to reduce energy consumption.SOLUTION: A hot water storage and supply device (1), when hot water in a hot water storage tank (5) stays for a certain time or more, is heated by an auxiliary heat source device (4) through a circulation heating circuit (20) to perform a sterilization operation. In the hot water storage and supply device, the hot water storage tank (5) is provided with a plurality of temperature sensors (5b, 5c, 5d) for detecting an internal hot water temperature. In the sterilization operation, circulating means is controlled to adjust an initial circulating flow rate at the beginning of the operation in accordance with the hot water temperature situation inside the hot water storage tank (5) detected by the temperature sensors (5b, 5c, 5d).SELECTED DRAWING: Figure 3 【課題】レジオネラ菌等が繁殖した貯湯タンク内の湯水の加熱殺菌処理に要する時間を短縮して、エネルギー消費の低減を図った貯湯給湯装置を提供する。【解決手段】貯湯タンク(5)内の湯水が一定時間以上滞留した場合に循環加熱回路(20)を通じて補助熱源機(4)により加熱して殺菌運転を行う貯湯給湯装置(1)において、貯湯タンク(5)には内部の湯水温度を検知するための温度センサ(5b,5c,5d)が複数設けられており、殺菌運転においては、温度センサ(5b,5c,5d)によって検知される貯湯タンク(5)内部の湯水温度状況に応じて運転開始当初の初期循環流量を調整するように循環手段を制御する。【選択図】図３