Heating device and method for detecting malfunction at a heating device
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Solution Overview
Problem
Heating devices face issues with pressure-related disturbances in central heating systems, leading to deviations in desired heat output due to low domestic water supply pressure and faults in the expansion tank, which existing technologies fail to detect accurately without additional gauges.
Innovation Solution
A heating device with a pressure sensor connected to a control unit that evaluates pressure data and generates error messages via a user interface, allowing for detection of pressure disturbances and expansion tank faults without additional measuring instruments, using a control unit to compare pressure measurements before and after the filling valve is opened, and referencing a table for liquid transfer rates and tank volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensor is installed to detect pressure-related disturbances, then measurement precision is improved, but device complexity increases due to additional measuring instruments
Solution Approach 1:
The existing pressure sensor designed for monitoring central heating line pressure is made multi-functional by implementing additional evaluation logic in the control unit. The control unit now evaluates pressure measurements taken at specific moments (when filling valve opens/closes) to detect both central heating line pressure issues and domestic water supply pressure issues, eliminating the need for separate pressure gauges for different purposes.
Solution Approach 2:
The control unit performs self-diagnosis by automatically evaluating pressure sensor data against predetermined patterns and generating error messages when deviations are detected. This self-monitoring capability allows the heating device to detect its own malfunctions (expansion tank faults, filling valve issues, domestic water supply problems) without requiring external diagnostic equipment or additional sensors.
2Measurement precision
If additional pressure gauges are installed to monitor domestic water supply pressure, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The control unit is enhanced to perform multiple monitoring functions using data from the existing pressure sensor. By evaluating pressure measurements at specific operational moments (when the filling valve opens or closes), the system can infer domestic water supply pressure conditions without installing a separate pressure gauge for the domestic water line.
Solution Approach 2:
The control unit acts as an intermediary that processes pressure sensor data to indirectly determine domestic water supply pressure. Instead of directly measuring domestic water pressure with a separate gauge, the system uses the existing pressure sensor measurements combined with control logic that analyzes pressure changes during filling valve operation to infer the domestic water supply pressure status.
3Reliability
If the control unit evaluates pressure data continuously, then reliability of fault detection is improved, but use of energy increases
Solution Approach 1:
The control unit evaluates pressure sensor data periodically at specific operational moments rather than continuously. Pressure measurements are taken and evaluated specifically when the filling valve opens or closes, which are critical moments for detecting pressure-related faults. This periodic evaluation approach maintains high fault detection reliability while significantly reducing energy consumption compared to continuous monitoring.
Solution Approach 2:
The control unit is configured to evaluate pressure data at predetermined moments in the operational cycle (when filling valve opens/closes). This preliminary positioning of measurement and evaluation actions at critical moments ensures that faults are detected reliably without requiring continuous energy-intensive monitoring throughout the entire operational cycle.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate detection and display of pressure-related issues and expansion tank faults, allowing for effective troubleshooting and monitoring of domestic water supply pressure without additional devices, ensuring reliable heating performance.
Implementation Method 1
a pressure sensor attached to the flow line or the return line for determining the liquid pressure
Implementation Method 2
a heating unit for heating a liquid
Implementation Method 3
The heater can also include an expansion tank connected to the central heating line. The expansion tank equalizes the excess pressure.
Implementation Method 4
a filling valve for controlling the water flow of the filling line
Data Source
Figure 1~2
AI summary
This invention relates to a heating device comprising a heating unit for heating a liquid, a flow line (41) connected to said heating unit, a flow line (41) connected to said heating unit for conveying liquid via a connectable central heating line (40) with at least one heat consumer connected thereto, a return line (42) connected to said heating unit for returning the cool liquid from the heat consumer from the central heating line (40), a domestic water supply line (30), a filling line connecting the domestic water supply line (30) to the flow line (41) or to the return line (42) for the purpose of supplying mains water, a filling valve (15) for controlling the water flow of the filling line, and an expansion tank (18) connected to the connectable central heating line (40).The device includes a pressure sensor (16) attached to the flow line (41) or the return line (42) for determining the liquid pressure, and a control unit (20) connected to said pressure sensor (16) for evaluating the measurement data from the pressure sensor (16) when the filling valve (15) is open. It is characterized by having a user interface (26) connected to the control unit (20), which is configured to output a corresponding error message via the user interface (26) when the control unit (20) and/or the user interface (26) detect deviations in the measurement data determined by the control unit (20) from at least one preset pattern for the pressure conditions.