INSTANTANEOUS HOT WATER TAPPING DEVICE

To provide an instantaneous hot water tapping device capable of performing discharge of expanded water so as to reduce loss of heat quantity in a hot water storage tank, while heating hot water in the hot water storage tank.SOLUTION: An instantaneous hot water tapping device 20A includes: an inflow side pipeline 30 opening to a portion closer to a lower part of a hot water storage tank 21; an outflow side pipeline 31 opening to a portion closer to an upper part of the hot water storage tank 21; and a bypass pipeline 32 in parallel with the hot water storage tank 21. A flow rate adjusting valve 33 as a bypass ratio adjusting valve is assembled to the inflow side pipeline 30, and an expanded water discharge device 37 is connected to the inflow side pipeline 30 on the downstream side of the flow rate adjusting valve 33. While heating the hot water in the hot water storage tank 21, the flow rate adjusting valve 33 is controlled to be in a valve closed state.SELECTED DRAWING: Figure 1 【課題】貯湯タンク内の湯水の加熱時に、貯湯タンク内の熱量の損失を少なくし得るように膨張水の排出を行うことができる即時出湯装置を提供する。【解決手段】貯湯タンク２１の下部寄りの部分に開口する流入側配管３０と、貯湯タンク２１の上部寄りの部分でに開口する流出側配管３１と、貯湯タンク２１と並列のバイパス配管３２とを有する即時出湯装置２０Ａには、バイパス比調整弁としての流量調整弁３３が流入側配管３０に組付けられ、膨張水排出装置３７が流量調整弁３３の下流側で流入側配管３０に接続されている。貯湯タンク２１内の湯水の加熱時に、流路調整弁３３を閉弁状態に制御する。【選択図】図１