Steam Generator Water Level Sensor Partition Against Bubble Interference
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Solution Overview
Problem
The water level sensor in steam generators for laundry machines malfunctions due to bubbles formed during boiling and foreign matter deposition, leading to inaccurate water level detection and potential mechanical damage.
Innovation Solution
A partition is introduced around the water level sensor to maintain a stable water state, preventing bubbles from reaching the sensor and protecting it from foreign matter, with features such as pass-through holes and slits to ensure equal water level rise rates and air pressure equality between spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the water level sensor is exposed to the boiling water space, then it can detect water level accurately, but bubbles and foreign matter cause malfunction and reduce reliability
Solution Approach 1:
The steam generator interior space is divided into two separate regions by a partition: a first space containing the heater where water boils and bubbles are generated, and a second space containing the water level sensor where water remains stable. The partition includes openings that allow water to flow between spaces but block bubbles and foreign matter from reaching the sensor, thus maintaining measurement accuracy while ensuring reliable operation.
2Reliability
If the partition completely seals the sensor space, then it protects from bubbles and foreign matter, but water level rise rates become unequal between spaces
Solution Approach 1:
The partition incorporates openings (holes or slits) that function as controlled porous structures. These openings are sized and positioned to allow water molecules to pass through freely, equalizing water levels between the first and second spaces, while being small enough to block larger bubble structures and foreign matter particles from reaching the sensor space.
3Object-affected harmful factors
If the partition blocks all openings, then it prevents bubble interference, but air pressure differences cause water level instability
Solution Approach 1:
The partition is designed with non-uniform characteristics: it has different regions with different properties. The main body of the partition provides complete blocking of bubbles and foreign matter, while specific localized openings are strategically positioned and sized to allow water flow and air pressure equalization. This local quality differentiation enables simultaneous achievement of bubble protection and water level stability.
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 stabilizes the water level sensor's operation, preventing malfunctions caused by boiling bubbles and extending the sensor's mechanical lifetime by maintaining a stable environment and protecting it from foreign contaminants.
Implementation Method 1
a partition surrounding the water level sensor and having a pass-through hole at a position above a lowest end of the high water level electrode
Implementation Method 2
a heater for heating the water to generate steam
Implementation Method 3
a water level sensor for sensing a water level of the water held in the housing
Data Source
AI summary
The present invention relates to laundry machines, such as washing machines or dryers, for washing or drying laundry. The steam generator (50) for a laundry machine includes a housing (80) formed to provide a space for holding water, a heater (55) for heating the water to generate steam, a water level sensor (60) for sensing a water level of the water held in the housing, and a stability maintaining member (70) for maintaining a stable state of the water at a portion to be sensed by the water level sensor (60).