Method for operating a water-bearing domestic appliance
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Solution Overview
Problem
Existing water-bearing domestic appliances, such as dishwashers, face inefficiencies due to maintenance being scheduled based on empirical values rather than actual wear, leading to potential performance degradation before necessary regeneration or maintenance is performed.
Innovation Solution
A method and appliance equipped with an electronic control device and total water volume recording device that tracks the total water volume supplied over the appliance's lifetime, allowing maintenance to be performed based on actual wear, including controlled regeneration of the ion exchanger and detergent dispensing, ensuring timely maintenance and optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If maintenance is scheduled based on empirical values, then the maintenance schedule is simple to establish, but maintenance may not be performed timely leading to performance degradation
Solution Approach 1:
The system implements feedback by continuously monitoring actual usage parameters (water volume, cycle counts, energy consumption) and using this information to dynamically adjust maintenance scheduling. The control unit receives feedback from sensors and modifies regeneration timing based on real appliance condition rather than following a fixed schedule, ensuring maintenance is performed exactly when needed.
Solution Approach 2:
The appliance performs self-diagnosis and self-scheduling of maintenance operations. The control unit automatically determines when regeneration or other maintenance activities are needed based on monitored usage patterns, eliminating the need for external intervention or complex manual scheduling while ensuring timely maintenance.
2Reliability
If regeneration is performed after a fixed number of wash cycles, then the control system is simple, but exchanger performance may degrade before regeneration occurs
Solution Approach 1:
The system transitions from a static, fixed-cycle regeneration schedule to a dynamic schedule that adapts to actual appliance usage. The control unit continuously evaluates multiple usage parameters and adjusts regeneration timing accordingly, allowing the maintenance schedule to flex and respond to changing operational conditions while maintaining optimal exchanger performance.
Solution Approach 2:
The system performs preliminary assessment of usage patterns to predict when regeneration will be needed, scheduling maintenance before performance degradation occurs. By monitoring usage in real-time and projecting future needs, the system proactively initiates regeneration at optimal moments rather than reacting to degradation after it has occurred.
3Productivity
If maintenance is delayed until empirical time periods elapse, then no additional monitoring resources are needed, but functional efficiency is lost due to delayed maintenance
Solution Approach 1:
The system uses feedback from usage monitoring to continuously optimize maintenance timing and maximize operational efficiency. By analyzing real-time data on water consumption, cycle frequency, and energy usage, the control unit determines the precise moment when maintenance will impact productivity, scheduling interventions to minimize disruption while preventing efficiency loss.
Solution Approach 2:
The patent replaces mechanical/time-based maintenance triggers with electronic monitoring and control systems. Instead of relying on fixed mechanical counters or time delays, the system uses electronic sensors and microprocessor-based control to intelligently determine maintenance needs, substituting simple mechanical systems with sophisticated electronic decision-making that optimizes productivity.
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
This approach enables maintenance activities to be tailored to the specific wear of each appliance, preventing premature performance degradation and optimizing operational efficiency by scheduling maintenance according to actual usage patterns.
Implementation Method 1
the water feed system being provided with a flow meter by means of which a volume of water being supplied to the dishwasher in a wash program or program step being executed at the time can be measured
Implementation Method 2
the feed valve being closed by means of a corresponding control signal from the control device when the control device detects that a volume of water desired for a wash program or a program step has been supplied via the water feed system
Data Source
AI summary
A water-bearing domestic appliance and method of operating a water-bearing domestic appliance, wherein the domestic appliance includes a water feed system that is controlled by a control device and that supplies a measured volume of water to the domestic appliance. The domestic appliance further includes a total water volume detection device to detect a total volume of water that is supplied via the water feed system to the domestic appliance during its service life.