WATER HEATER

• Main Authors: YAMASHITA SATOSHI, NAKANO KUNIHIKO
• Format: Patent
• Language: English; Japanese
• Published: 01.02.2023
• Subjects: BLASTING; DOMESTIC HOT-WATER SUPPLY SYSTEMS; DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATINGSYSTEMS; ELEMENTS OR COMPONENTS THEREFOR; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

To detect an open failure of a check valve for backflow prevention of low temperature water.SOLUTION: A mixing valve 340 outputs hot water in which high temperature water from a high temperature water pipeline 119a and low temperature water from a low temperature water pipeline 111 are mixed to a hot water tapping pipeline 121. At the low temperature water pipeline 111, a check valve 55 which has a checking function for inhibiting a flow from the mixing valve 340 toward a water supply end 101 is interposed and connected. A temperature detector 510 is arranged in a path of low temperature water between the water supply end 101 and the check valve 55. When a detection temperature by the temperature detector 510 rises above a reference temperature set according to the temperature of the low temperature water introduced into the water supply end 101, an open failure is detected in which the checking function of the check valve 55 is lost.SELECTED DRAWING: Figure 1 【課題】低温水の逆流防止のための逆止弁の開放故障を検出する。【解決手段】混合弁３４０は、高温水配管１１９ａからの高温水と、低温水配管１１１からの低温水を混合した湯水を出湯配管１２１へ出力する。低温水配管１１１には、混合弁３４０から給水端１０１へ向かう通流を阻止する逆止機能を有する逆止弁５５が介挿接続される。温度検出器５１０は、給水端１０１及び逆止弁５５の間の前記低温水の経路に配置される。温度検出器５１０による検出温度が、給水端１０１に導入される低温水の温度に従って設定される基準温度よりも上昇すると、逆止弁５５の逆止機能が喪失された開放故障が検出される。【選択図】図１