Laundry Dryer Filter Net Self-Cleaning to Prevent Lint Re-Deposition
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Solution Overview
Problem
Existing laundry treatment apparatuses face challenges in effectively removing foreign substances from filter nets during the drying process, leading to reduced efficiency and potential re-deposition of these substances onto laundry.
Innovation Solution
A method involving a laundry treatment apparatus with a filter net and nozzle arrangement that allows for controlled spraying and drainage of cleaning water, ensuring thorough removal of foreign substances from the filter net, including a brush to aid in the separation and drainage process, preventing re-deposition onto laundry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cleaning water is sprayed to the filter net to remove foreign substances, then the filter net cleaning effectiveness is improved, but the foreign substances are not easily removed and cleaning performance is insufficient
Solution Approach 1:
The filter net is divided into multiple regions with different spray densities. The nozzle arrangement part includes multiple nozzles that spray cleaning water at different intervals, creating segmentated cleaning zones. This allows different areas of the filter net to receive appropriate cleaning intensity, improving overall cleaning effectiveness while maintaining reasonable water usage.
Solution Approach 2:
Different regions of the filter net receive different spray densities based on local contamination characteristics. The nozzle arrangement part is configured to provide higher spray density in areas where foreign substances tend to accumulate more heavily, while using lower density in less contaminated areas. This localized quality adjustment optimizes cleaning performance.
2Reliability
If a filter net is disposed on the circulation path to collect foreign substances, then foreign substance collection is improved, but the filter net becomes polluted and requires cleaning
Solution Approach 1:
The cleaning operation is performed in advance during the draining process before the filter net is reused for the next drying cycle. The nozzle arrangement part sprays cleaning water to remove accumulated foreign substances, and the brush part mechanically assists removal. This preliminary cleaning action prevents pollution buildup and maintains collection effectiveness.
Solution Approach 2:
The filter net cleaning system is integrated into the existing draining process, allowing the apparatus to clean itself without requiring separate manual intervention. The cleaning water is supplied through the water supply part, and the draining part removes both the cleaning water and detached foreign substances together, making the system self-maintaining.
3Productivity
If cleaning water is sprayed to remove foreign substances from the filter net, then foreign substance removal is improved, but the cleaning water containing foreign substances must be drained
Solution Approach 1:
The cleaning water drainage function is merged with the existing water drainage system. The draining part that normally drains wash water is also used to drain the cleaning water and detached foreign substances. This integration avoids adding a separate drainage system, maintaining simplicity while achieving effective removal of cleaning water containing foreign substances.
4Loss of time
If the filter net is cleaned during the draining process, then cleaning time is reduced, but the cleaning water may re-deposit foreign substances onto the laundry
Solution Approach 1:
The cleaning operation is performed as a preliminary action during the draining process when the water level is receding. By timing the cleaning to occur when most wash water has already been drained, the risk of re-deposition is minimized. The cleaning water and detached foreign substances are then drained together in the remaining draining time.
Solution Approach 2:
The brush part provides mechanical action to enhance the cleaning effectiveness of the sprayed water. The brush physically contacts the filter net and helps detach foreign substances that may be firmly adhered, working in conjunction with the water spray to improve removal efficiency without requiring additional time.
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 method ensures uniform cleaning of the filter net, increases cleaning performance by targeted water spraying, automatically removes foreign substances during the draining process, and prevents re-pollution of the laundry, enhancing the overall efficiency and cleanliness of the apparatus.
Implementation Method 1
a nozzle arrangement part in which a plurality of nozzles, for spraying cleaning water to the filter net from the lower side of the filter part, are arranged
Implementation Method 2
a brush part having a brush which makes contact with an upper side of the filter net
Data Source
AI summary
The present invention relates to a method for controlling a laundry treatment apparatus which automatically removes and discharges foreign substances collected in a filter net provided on an air circulation path. A laundry treatment apparatus according to the present invention comprises: an outer tub; an inner tub disposed inside the outer tub; an air circulation path of which the start end is connected to the side surface of the outer tub, and which includes a section which upwardly extends from the upper side to the lower side; a water drain path which is connected to the lower surface of the outer tub so as to guide water inside the outer tub to be drained to the outside; a filter part having a filter net which is disposed to traverse the upwardly extending section of the air circulation path; and a nozzle arrangement part in which a plurality of nozzles, for spraying cleaning water to the filter net from the lower side of the filter part, are arranged. A method for controlling the laundry treatment apparatus comprises: a water supplying step of supplying wash water into the outer tube; a laundry washing step for washing or rinsing laundry in the inner tub by using the wash water; and a water draining step of controlling the wash water to be drained through the water drain path while controlling the cleaning water to be sprayed through the plurality of nozzles and be drained through the water drain path.