Hot water supplier monitoring system

Patent metadata

Field	Value
Publication number	US-12442559-B2
Application number	US-202217940008-A
Country	US
Kind code	B2
Filing date	Sep 8, 2022
Priority date	Sep 21, 2021
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

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.

First claim

What is claimed is:

1. A hot water supplier monitoring system, comprising a monitoring server for monitoring a plurality of hot water suppliers via a communication network, wherein the hot water supplier comprises a combustion unit; a fuel supply unit for supplying fuel to the combustion unit; a combustion fan for supplying combustion air to the combustion unit; an ignition device of the combustion unit; a heat exchange unit; and a control unit for controlling a hot water supply operation in which hot water is supplied by adjusting temperature of hot water heated by the heat exchange unit using combustion heat by burning fuel in the combustion unit by combustion operation, and the monitoring server accumulates operation data of the combustion operation transmitted from the plurality of hot water suppliers via the communication network, and predicts and notifies occurrence of malfunction for each hot water supplier based on trend of change over time in the operation data,
wherein the operation data comprises a number of flame quenchings of the combustion unit in the combustion operation, and
the monitoring server divides the plurality of hot water suppliers into a plurality of groups according to installation areas, compares a group average value of the number of flame quenchings of a same period among the plurality of groups and compares a group average value of the number of flame quenchings of a specific group with a previous group average value of the number of flame quenchings of the specific group, determines whether or not there is an abnormality in the group average value of the number of flame quenchings of the specific group based on results of the comparisons, and determines whether or not the combustion operation of the hot water suppliers belonging to the specific group meet a normal usage condition of the hot water suppliers based on weather information and infrastructure information in an installation area of the specific group,
wherein when it is determined that the normal usage condition of the hot water supplier is not met, the monitoring server excludes the operation data of the specific group determined as having an abnormality in the group average value of the number of flame quenchings from malfunction occurrence prediction for a specific group determined as having an abnormality in the number of flame quenchings, and performs the malfunction occurrence prediction for each hot water supplier based on remaining operation data after excluding the operation data of the specific group determined as having an abnormality in the group average value of the number of flame quenchings.

2. The hot water supplier monitoring system according to claim 1 , wherein when it is determined that, among the weather information of a corresponding period in the installation area of the specific group acquired via the communication network, at least wind speed and air temperature do not meet the normal usage condition of the hot water supplier, the monitoring server excludes the operation data of the specific group determined as having an abnormality in the group average value of the number of flame quenchings from the malfunction occurrence prediction for each of the hot water suppliers.

Assignees

• Noritz Corp

Inventors

• Yoshida Naoya
• Hamagami Toshihiko
• Nishimura Kazuhiro
• Hayase Hisataka

Classifications

• F24H15/269

  Time, e.g. hour or date · CPC title

• F24H15/296

  Information from neighbouring devices · CPC title

• F24H15/457

  using telephone networks or Internet communication · CPC title

• G05B2223/06

  Remote monitoring · CPC title

• G05B2223/04

  Detection of intermittent failure · CPC title