HOT WATER HEATING DEVICE

To provide an indirect heating type hot water heating device for controlling circulation means (circulation pump) with a simple control logic by using a plurality of detection temperatures.SOLUTION: A hot water heating device (W) includes: a hot water storage tank (1) for storing hot water; heating means (2); and a circulation heating circuit (3) for connecting the hot water storage tank (1) with the heating means (2). The circulation heating circuit (3) includes: circulation means (6) for circulating hot water; and a heating heat exchanger (11) for heating a heating medium for heating. The hot water heating device further includes control means (27) for controlling the circulation means (6) so that a temperature difference between a hot water delivery temperature of hot water delivered from the heating means (2) and a water inflow temperature of hot water introduced to the heating means (2) (temperature difference between the hot water delivery temperature and the water inflow temperature) and a temperature difference between a temperature of the heating medium for heating discharged from the heating heat exchanger (11) and a temperature of the heating medium for heating introduced to the heating heat exchanger (11) (temperature difference between a heating outgoing temperature and a heating return temperature) become the same.SELECTED DRAWING: Figure 1 【課題】複数の検出温度を用いて簡単な制御ロジックで循環手段（循環ポンプ）を制御する間接加熱方式の温水暖房装置を提供する。【解決手段】湯水を貯留する貯湯タン (1)と、加熱手段(2) と、貯湯タンク(1) と加熱手段(2) を接続する循環加熱回路(3) を備え、循環加熱回路(3) には湯水を循環させる為の循環手段(6) と暖房用熱媒を加熱するための暖房用熱交換器(11)が設けられている温水暖房装置(W) において、加熱手段(2) から出湯される湯水の出湯温度と加熱手段(2) に導入される湯水の入水温度の差温（出湯温度と入水温度の差温）と、暖房用熱交換器(11)から吐出される暖房用熱媒の温度と暖房用熱交換器(11)に導入される暖房用熱媒の温度の差温（暖房往き温度と暖房戻り温度の差温）とが同じになるように循環手段(6) を制御する制御手段(27)を設けた。【選択図】図１