公开(公告)号：US20230085869A1

公开(公告)日：2023-03-23

申请号：US17940008

申请日：2022-09-08

申请人： NORITZ CORPORATION

发明人： Naoya Yoshida ,  Toshihiko Hamagami ,  Kazuhiro Nishimura ,  Hisataka Hayase

IPC分类号： F24H15/104 ,  F24H9/25 ,  F24H15/262

摘要： A hot water supplier monitoring system includes a monitoring server monitoring hot water suppliers via a communication network. The hot water supplier supplies hot water by adjusting temperature of hot water heated by a heat exchange unit using combustion heat from combustion operation. The monitoring server accumulates operation data of combustion operation transmitted from the suppliers, and predicts and notifies malfunction occurrence for each supplier based on trend of change in the data over time. The data includes number of flame quenchings of the combustion unit in combustion operation. The monitoring server divides the suppliers into groups according to installation areas, compares the number of quenchings of same period among the groups, compares with previous number of quenchings of same group, and, for a specific group determined having an abnormal number of quenchings, excludes the data determined having an abnormal number of quenchings and predicts malfunction occurrence for each supplier.

公开(公告)号：US20230091101A1

公开(公告)日：2023-03-23

申请号：US17901865

申请日：2022-09-02

申请人： NORITZ CORPORATION

发明人： Naoya Yoshida ,  Toshihiko Hamagami ,  Kazuhiro Nishimura ,  Hisataka Hayase

IPC分类号： F24H15/104 ,  G01N25/00

摘要： A hot water supplier includes a combustion unit including multiple combustion stages; a combustion fan supplying combustion air; a fuel supply unit supplying fuel; a heat exchange unit; a water supply unit supplying hot water to heat exchange unit; a hot water tapping unit discharging hot water heated in heat exchange unit by using combustion heat obtained by burning fuel in combustion unit; and a control unit controlling heating operation. When reheating operation is allowed in which hot water from hot water tapping unit is returned to water supply unit and reheated by heat exchange unit, control unit stores heating time using only a combustion stage having minimum combustion capacity during reheating operation as time data. If this time data tends to increase over time, deterioration progress of a heat retaining material covering a hot water pipe to which hot water is supplied from hot water tapping unit is determined.