INTERNAL CIRCULATION TYPE HOT WATER SYSTEM

• Main Author: MORI SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 12.04.2018
• Subjects: BLASTING; DOMESTIC HOT-WATER SUPPLY SYSTEMS; DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATINGSYSTEMS; ELEMENTS OR COMPONENTS THEREFOR; FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To provide an internal circulation type hot water system in which the rise time at the start of hot water supply is short.SOLUTION: An internal circulation type hot water system comprises: a heat exchanger 2 for creating hot water by heat exchange between steam and cold water; a steam control valve 3 for regulating the steam supply amount to the heat exchanger 2; a tank 4 for accumulation the cold water introduced into the heat exchanger 2; a return passage 5 for returning a part of the hot water from the heat exchanger 2 to the tank 4; an adjusting valve 29 provided in the return passage 5 for adjusting the aperture of the passage; a hot water temperature sensor 30 for detecting the temperature of the hot water; temperature control means 34 for adjusting the aperture of the steam control valve 3 so that the hot water temperature detected by the hot water temperature sensor 30 becomes a preset temperature; and aperture suppression means 35 for reducing the aperture of the adjusting valve 29 until the hot water temperature detected at the start of operation reaches the preset temperature.SELECTED DRAWING: Figure 1 【課題】給湯開始時の立ち上がり時間が短い内部循環型給湯システムを提供する。【解決手段】蒸気と冷水との熱交換により温水を生成する熱交換器２と、熱交換器２への蒸気供給量を調整する蒸気制御弁３と、熱交換器２に導入される冷水を貯留するタンク４と、熱交換器２からの温水の一部をタンク４に戻す戻し通路５と、戻し通路５に設けられて同通路の開度を調整する調整弁２９と、温水の温度を検出する温水温度センサ３０と、温水温度センサ３０で検出された温水温度が設定温度になるように蒸気制御弁３の開度を調整する温度調整手段３４と、運転開始時に検出された温水温度が設定温度に達するまで調整弁２９の開度を小さくする開度抑制手段３５と、を備えている。【選択図】図１