STORAGE WATER HEATER

PROBLEM TO BE SOLVED: To provide a storage water heater capable of effectively using hot water generated in a hot water storage tank for hot water supply through heat recovery operation.SOLUTION: A storage water heater 35 includes: high-temperature piping 21 communicated with a first position of the...

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Bibliographische Detailangaben
Hauptverfasser: TAKEUCHI NORITO, KOUCHI MASAAKI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a storage water heater capable of effectively using hot water generated in a hot water storage tank for hot water supply through heat recovery operation.SOLUTION: A storage water heater 35 includes: high-temperature piping 21 communicated with a first position of the hot water storage tank 8; intermediate-temperature piping 79 communicated with the hot water storage tank 8 at a second position lower than the first position; low-temperature piping 10 communicated with the hot water storage tank 8 at a third position lower than the second position; a bath heat exchanger 20 for exchanging heat between bath water from a bathtub 30 and tank water from the hot water storage tank 8; a circulation pump 12 for adjusting a flow rate of the tank water passing through the bath heat exchanger 20; and return piping 20b communicated with the hot water storage tank 8 at a position as high as the second position or a position lower than the second position and higher than the third position. In heat recovery operation for recovering heat of the bath water in the bathtub 30, the tank water taken out from the hot water storage tank 8 through the low-temperature piping 10 can flow into the hot water storage tank 8 through the return piping 20b after passing through the bath heat exchanger 20.SELECTED DRAWING: Figure 3 【課題】熱回収運転により貯湯タンク内に生成した温水を給湯に有効に利用できる貯湯式給湯装置を提供する。【解決手段】貯湯式給湯装置35は、貯湯タンク8の第一位置に連通する高温配管21と、第一位置より低い第二位置で貯湯タンク8に連通する中温配管79と、第二位置より低い第三位置で貯湯タンク8に連通する低温配管10と、浴槽30からの浴水と、貯湯タンク8からのタンク水との間で熱を交換する風呂用熱交換器20と、風呂用熱交換器20を通過するタンク水の流量を調整する循環ポンプ12と、第二位置と同じ高さの位置、または第二位置より低く第三位置より高い位置で貯湯タンク8に連通する戻り配管20bとを備える。浴槽30内の浴水の熱を回収する熱回収運転において、貯湯タンク8から低温配管10を通って取り出されたタンク水が、風呂用熱交換器20を通過した後に、戻り配管20bを通って貯湯タンク8内に流入可能である。【選択図】図3