Univariate Anomaly Detection in a Sensor Network
US-2021095996-A1 · Apr 1, 2021 · US
Hot water supply device
US11639799B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11639799-B2 |
| Application number | US-202017124514-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 17, 2020 |
| Priority date | Dec 17, 2020 |
| Publication date | May 2, 2023 |
| Grant date | May 2, 2023 |
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- Title
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Abstract
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A hot water supply device including an inlet pipe, an outlet pipe, a burner unit, a heat exchanger, an exhaust aperture, a first temperature sensor detecting a measured exhaust temperature of the exhaust gas, a second temperature sensor detecting a water temperature of water entering the inlet pipe, and a processor. The processor is configured to obtain an error between the measured exhaust temperature and an estimated exhaust temperature, and detects that scale clogging has occurred inside the heat exchange tubing based on an index which is generated using the error between the measured exhaust temperature and the estimated exhaust temperature. The estimated exhaust temperature is a first predetermined value that is determined using a numerical equation which has at least the water temperature of water entering the inlet pipe and a scale number of the hot water supply device as variables of the numerical equation.
First claim
Opening claim text (preview).
What is claimed is: 1. A hot water supply device, adapted to generate hot water through heat exchange, the hot water supply device comprising: an inlet pipe; an outlet pipe; a burner unit for combusting a fuel gas to generate heat; a heat exchanger comprising a heat exchange tubing, disposed between the inlet pipe and the outlet pipe, and adapted to exchange heat between the fuel gas combusted by the burner unit and water passing through the heat exchanger; an exhaust aperture discharging exhaust gas after heat exchange by the heat exchanger; a first temperature sensor for detecting a measured exhaust temperature of the exhaust gas; a second temperature sensor for detecting a water temperature of water entering the inlet pipe; and a processor, wherein, in a steady state combustion operation of the hot water supply device, the processor is configured to obtain an error between the measured exhaust temperature and an estimated exhaust temperature, and detects that scale clogging has occurred inside the heat exchange tubing based on an index which is generated using the error between the measured exhaust temperature and the estimated exhaust temperature, wherein the estimated exhaust temperature is a first predetermined value that is determined using a numerical equation which has at least the water temperature of water entering the inlet pipe and a scale number of the hot water supply device as variables of the numerical equation, wherein the estimated exhaust temperature is calculated by the following formula 2: [ Estimated Exhaust Temperature ] = a × [ Water temperature of water entering the inlet pipe ] + b × [ Scale number of the hot water supply device ] , wherein the scale number of the hot water supply device in formula 2 is calculated using the water temperature of water entering the inlet pipe, and a and b are coefficients that are not zero. 2. A hot water supply device, adapted to generate hot water through heat exchange, the hot water supply device comprising: an inlet pipe; an outlet pipe; a burner unit for combusting a fuel gas to generate heat; a heat exchanger comprising a heat exchange tubing, disposed between the inlet pipe and the outlet pipe, and adapted to exchange heat between the fuel gas combusted by the burner unit and water passing through the heat exchanger; an exhaust aperture discharging exhaust gas after heat exchange by the heat exchanger; a first temperature sensor for detecting a measured exhaust temperature of the exhaust gas; a second temperature sensor for detecting a water temperature of water entering the inlet pipe; and a processor, wherein, in a steady state combustion operation of the hot water supply device, the processor is configured to obtain an error between the measured exhaust temperature and an estimated exhaust temperature, and detects that scale clogging has occurred inside the heat exchange tubing based on an index which is generated using the error between the measured exhaust temperature and the estimated exhaust temperature, wherein the estimated exhaust temperature is a first predetermined value that is determined using a numerical equation which has at least the water temperature of water entering the inlet pipe and a scale number of the hot water supply device as variables of the numerical equation, wherein the estimated exhaust temperature is calculated by the following formula 5: [ Estimated Exhaust Temperature ] = c × [ Water temperature
Assignees
Inventors
Classifications
for domestic hot water · CPC title
Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters (steam boilers F22B) · CPC title
based on a quantitative model, e.g. mathematical relationships between inputs and outputs; functions: observer, Kalman filter, residual calculation, Neural Networks · CPC title
with conventional heating means (F24D17/0036 takes precedence) · CPC title
using fluid fuel · CPC title
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- What does patent US11639799B2 cover?
- A hot water supply device including an inlet pipe, an outlet pipe, a burner unit, a heat exchanger, an exhaust aperture, a first temperature sensor detecting a measured exhaust temperature of the exhaust gas, a second temperature sensor detecting a water temperature of water entering the inlet pipe, and a processor. The processor is configured to obtain an error between the measured exhaust tem…
- Who is the assignee on this patent?
- Noritz Corp
- What technology area does this patent fall under?
- Primary CPC classification F24D19/0092. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 02 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).