Laundry dryer
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Solution Overview
Problem
Laundry dryers require frequent manual extraction and cleaning of fluff traps, which is inconvenient and can lead to improper handling and reduced dryer performance due to dirt accumulation.
Innovation Solution
A laundry dryer with a fluff trap positioned downstream of the laundry compartment and upstream of the heat exchanger, equipped with a screen filter wall and an automatic cleaning system that brushes or scrapes the filter wall, along with a compacting system to collect fluff, eliminating the need for manual cleaning and reducing fluff dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluff trap is positioned upstream of the heat exchanger to protect it from dirt and sedimentation, then the heat exchange efficiency is maintained, but the fluff trap requires frequent manual extraction and cleaning which creates user inconvenience and potential improper handling
Solution Approach 1:
The fluff trap is equipped with an automatic cleaning system that includes a brush or scraper mechanism to automatically remove accumulated fluff from the filter wall during or after drying cycles. This self-service capability eliminates the need for frequent manual extraction and cleaning by users, maintaining heat exchange efficiency while significantly improving user convenience and preventing improper handling
Solution Approach 2:
The automatic cleaning system performs preliminary cleaning action by removing fluff accumulation before it significantly impacts heat exchange efficiency. The system proactively maintains the fluff trap's filtering capability through automated brush or scraper mechanisms that operate during or after drying cycles, preventing the need for urgent manual intervention
2Reliability
If manual cleaning of the fluff trap is required after each drying cycle, then the filter remains effective, but the frequent extraction and re-insertion of the fluff trap creates discomfort and potential damage
Solution Approach 1:
The fluff trap incorporates an automatic cleaning mechanism with a brush or scraper that autonomously removes fluff from the filter wall without requiring user intervention. This self-service system maintains filter effectiveness while eliminating the complex manual extraction, cleaning, and re-insertion process, thereby reducing maintenance complexity and preventing user-induced damage
Solution Approach 2:
The cleaning function is merged with the fluff trap assembly, creating an integrated unit where the brush or scraper mechanism is permanently attached to the fluff trap structure. This merging eliminates the need for separate manual cleaning operations and reduces the complexity of maintenance procedures while ensuring continuous filter effectiveness
3Ease of operation
If the fluff trap is positioned in the lower part of the dryer for easy access, then user accessibility is improved, but the need to open the base and handle the fluff trap in bent posture creates discomfort
Solution Approach 1:
The automatic cleaning system eliminates the need for users to manually access and clean the fluff trap by performing the cleaning function autonomously. This removes the harmful factor of user discomfort associated with bending and handling the fluff trap, while the fluff trap can remain in its optimal position upstream of the heat exchanger without requiring frequent user interaction
4Reliability
If the fluff trap collects fluff over time, then it protects the heat exchanger, but the accumulated fluff needs to be removed at frequent intervals which reduces productivity
Solution Approach 1:
The automatic cleaning mechanism continuously or periodically removes fluff from the filter wall, maintaining the fluff trap's protective function without requiring interruption of drying cycles. This self-service capability ensures heat exchanger protection while minimizing impact on productivity by automating the fluff removal process
Solution Approach 2:
The cleaning system operates continuously or at predetermined intervals during the dryer's operation, ensuring that the fluff trap remains effective in protecting the heat exchanger without requiring停顿 of the drying process. This continuous action maintains both heat exchanger protection and drying 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
The automatic cleaning and compacting systems ensure efficient and accurate maintenance of the fluff trap, reducing the frequency of manual intervention, preventing improper handling, and maintaining dryer performance by continuously cleaning and compacting fluff within the dryer.
Implementation Method 1
passes through a heat exchanger for moisture extraction by means of condensation
Implementation Method 2
a filter cleaning system configured to brush and/or scrape the filter wall when the fluff trap is assembled in the laundry dryer
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A laundry dryer (1) comprises a housing (2) which houses a laundry compartment (3), an air circuit (4) which includes the laundry compartment (3) and a heat exchanger (5) for extracting moisture from the drying air (11), a fluff trap (6) with a screen filter wall (7), positioned in the air circuit (4) downstream of the laundry compartment (3) and upstream of the heat exchanger (5), wherein a cleaning system (8) brushes and/or scrapes the filter wall (7) when the fluff trap (6) is assembled in the laundry dryer (1).