Dishwasher Dosing Reservoir Rotation to Prevent Detergent Clumping
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Solution Overview
Problem
Dosing devices for automatic dishwashers face issues with pourable cleaning agents clumping due to moisture ingress, especially in humid environments, leading to unreliable operation.
Innovation Solution
A method where the dosing device's storage container is designed to pivot and perform a twisting movement after a predefined period (e.g., 24 hours) to break up clumps and maintain pourability, with the movement being automatic and independent of washing programs, ensuring the cleaning agent remains effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the storage container is sealed to prevent moisture ingress, then the cleaning agent remains pourable longer, but moisture can still enter during high humidity periods causing clumping
Solution Approach 1:
The system performs periodic twisting movements of the storage container at defined intervals (e.g., every 24 hours) to break up clumps before they become permanent. This periodic mechanical action prevents the harmful effect of moisture by disrupting the clumping process rather than trying to completely prevent moisture ingress.
Solution Approach 2:
The dosing device automatically monitors time and performs twisting movements without external intervention. The control unit tracks the time since the last twisting movement and automatically initiates the twisting action when the predefined interval is reached, making the system self-regulating and independent of manual operation or washing programs.
2Reliability
If the storage container is rotated frequently to prevent clumping, then the cleaning agent remains pourable, but the device complexity increases
Solution Approach 1:
Instead of continuous rotation, the system uses periodic twisting movements at predetermined intervals. This simplifies the control mechanism compared to continuous monitoring and adjustment systems, as it only requires a timer or clock mechanism to track intervals and trigger the twisting action automatically.
Solution Approach 2:
The control unit monitors the time elapsed since the last twisting movement and automatically triggers the next twisting action when the predefined interval is reached. This feedback mechanism ensures regular prevention of clumping without requiring complex control systems, as it simply compares current time with the last operation time.
3Reliability
If the twisting movement is performed automatically independent of washing programs, then the cleaning agent is protected from clumping during storage, but energy is consumed during non-operational periods
Solution Approach 1:
The system performs energy-consuming twisting movements only at predefined intervals during storage periods when the dosing device is not actively dosing. By concentrating mechanical energy input into brief periodic twisting actions rather than continuous operation, the system minimizes overall energy consumption while still effectively preventing clumping throughout the storage period.
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
Prevents permanent clumping of cleaning agents, ensuring they remain pourable and can be dosed reliably, even in high humidity conditions, by regularly breaking up encrustations and lumps through controlled rotation.
Implementation Method 1
a twisting movement of the reservoir being carried out if the comparison value is exceeded by the actual value... the cleaning agent stored in the reservoir moves through, as a result of which clumps and/or incrustations that may have formed in the last 24 hours break up and dissolve
Data Source
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AI summary
The invention relates to a method for operating a dosing device of an automatic dishwasher, which has a storage container that can be filled with pourable cleaning agent and a motor-driven drive device for the storage container, the drive device receiving the storage container so that it can be rotated about an axis of rotation (16), in which the Storage container elapsed period of time is recorded as an actual value and compared with a predefinable comparison value, wherein in the event that the comparison value is exceeded by the actual value, a twisting movement of the storage container is carried out independently of a flushing program.