Dishwasher Door Lock Position Sensing for Leak-Free Closure
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Solution Overview
Problem
Existing dishwasher door position determination devices struggle to accurately detect the closed end position due to manufacturing tolerances, leading to potential leakage during dishwashing cycles.
Innovation Solution
A movably mounted element is integrated into the dishwasher, allowing the signal transmitter and receiver to move independently, enabling an abrupt change in signal level detection when the door reaches its closed position, ensuring precise detection of the closed end position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the signal transmitter and signal receiver are fixed in position, then the device structure is simple, but the door closed position detection precision deteriorates due to manufacturing tolerances
Solution Approach 1:
The signal transmitter is mounted on a movably mounted element that can move relative to the signal receiver, transforming the fixed positioning system into a dynamic one. This allows the system to compensate for manufacturing tolerances and achieve precise detection of the door closed position through relative movement and abrupt position change detection.
2Measurement precision
If the signal transmitter and signal receiver are positioned close together, then the detection sensitivity is improved, but the risk of premature detection increases
Solution Approach 1:
The system detects the abrupt periodic change in signal level that occurs when the movably mounted element suddenly shifts position at the closed end position. This periodic action approach allows the system to distinguish between gradual signal changes during door closing and the specific abrupt change indicating true closed position, preventing premature detection.
3Measurement precision
If the determination device uses a continuous signal approach, then the signal coverage is improved, but the closed position detection accuracy deteriorates
Solution Approach 1:
The movably mounted element rushes through the detection zone with an abrupt position change when the door reaches the closed end position, creating a sudden, clear signal level change. This skipping approach transforms a continuous gradual signal change into a distinct abrupt transition, making the closed position detection more accurate and clear.
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 solution allows for reliable detection of the door's closed position, preventing leakage and ensuring safe operation by providing a clear signal change when the door is fully closed, thus preventing premature or incorrect detection.
Implementation Method 1
a determination device for determining the position of the door, the determination device comprising a signal transmitter and a signal receiver
Data Source
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AI summary
The dishwasher (1) comprises a washing compartment (20), of which a loading opening (21) is closed by a door (30). A determination device is provided for determining the position of the door. The determination device has a movably mounted element, a signal transmitter or a signal receiver for determining position of the door, particularly closed end position of the door. An independent claim is also included for a door lock for locking door of a washing compartment of a dishwasher, particularly domestic dishwasher.