Self-Cleaning Dryer Filter Using Movable Scraper and Gear Channels
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Solution Overview
Problem
Existing dryers with mechanical scrapers face issues such as sealing problems, space constraints, and inefficiencies in collecting and transferring fibers due to the need for multiple parts, which compromises the effectiveness of the filter and poses health risks.
Innovation Solution
A self-cleaning dryer design featuring a V-type or cartridge-type filter with gear channels and a scraper that moves along the air flow direction, utilizing locking and connection members for smooth operation, a perforated scraper for air flow preservation, and a bag for fiber collection, allowing for automatic cleaning without compromising the filter's size or air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a mechanical scraper is used to clean the filter, then the filter can be automatically cleaned, but sealing problems occur in the circulation of drying air
Solution Approach 1:
The scraper mechanism is extracted from the traditional fixed position and integrated with the movable filter assembly. The scraper is attached to the filter holder rather than being a separate stationary component, allowing it to move with the filter during cleaning operations while maintaining proper sealing positions when the filter is in its normal operating position.
Solution Approach 2:
The system transitions from a static scraper design to a dynamic one where the scraper moves with the filter assembly. The filter holder incorporates both filtering and scraping functions, and the scraper's position is dynamically adjusted based on whether the filter is in filtering mode or cleaning mode, resolving the sealing issue by ensuring the scraper only contacts the filter during controlled cleaning cycles.
2Extent of automation
If a scraper is added to clean the filter, then filter cleaning is enabled, but the filter size must be decreased to make room for the scraper
Solution Approach 1:
The scraper mechanism is merged with the filter holder structure rather than being added as a separate external component. The filter holder serves dual functions: supporting the filter during normal operation and driving the scraper against the filter during cleaning. This integration eliminates the need for additional space that would be required for a separate scraper assembly.
Solution Approach 2:
The filter holder is designed with multi-functionality, serving both as a support structure for the filter and as the driving mechanism for the scraper. This universal component performs multiple functions (filtering, cleaning, and structural support) without requiring separate dedicated components, thereby preserving the full filter surface area.
3Productivity
If a scraper is used to clean the filter, then fibers can be removed, but difficulty is found in transferring the scraped fibers
Solution Approach 1:
A fiber collection bag is introduced as an intermediary component that receives scraped fibers directly from the scraper. The bag is positioned to catch fibers as they are removed from the filter surface, eliminating the need for complex transfer mechanisms. The bag serves as a simple, effective intermediary that collects and contains the fibers for easy disposal.
Solution Approach 2:
The fiber collection function is extracted from the main dryer body and attached to the filter assembly itself. The collection bag is mounted on the filter holder, allowing fibers to be collected at the source of removal. This extraction of the collection function to the filter level simplifies the overall system by eliminating the need for centralized fiber transfer mechanisms.
4Ease of operation
If multiple parts are used for the scraper mechanism, then the scraping function is achieved, but sealing problems occur and maintenance becomes difficult
Solution Approach 1:
Multiple functions (filter support, scraper mounting, scraper actuation, and fiber collection) are merged into a single integrated filter holder assembly. This consolidation reduces the number of separate parts that need to be sealed and maintained, while still achieving the complete scraping and collection function. The integrated design eliminates multiple sealing interfaces between separate components.
Solution Approach 2:
The filter assembly is segmented into modular components (filter element, filter holder, scraper, and collection bag) that can be easily separated for maintenance. The filter can be removed from the holder, and the scraper can be detached from the holder, allowing each component to be independently cleaned or replaced without disassembling the entire dryer system.
5Productivity
If the scraper contacts the filter to collect fibers, then fiber collection is achieved, but health risks arise from user exposure to fibers
Solution Approach 1:
The fiber collection function is extracted from the user interaction zone and integrated with the filter assembly. The collection bag is attached to the filter holder, capturing fibers at the point of removal from the filter. This extraction ensures fibers are contained within the sealed filter assembly throughout the cleaning process, preventing user exposure.
Solution Approach 2:
The collection bag serves as an intermediary containment structure between the scraper and the user. Fibers are transferred from the filter to the bag through a sealed interface, and the bag itself acts as a barrier that prevents fiber release into the environment during handling and disposal.
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
Enables effective and automatic cleaning of both sides of the filter, preventing clogging and health hazards, while maintaining ease of maintenance and ensuring seamless air flow, thus improving the overall efficiency and safety of the drying process.
Implementation Method 1
gear channels which enable the scraper to be moved along the direction of the air flow. The gear channels match with a gear which is provided in the housing wherein the filter is disposed. As the gear rotates, the gear channel and hence the scraper move
Implementation Method 2
the scraper is produced with a perforated structure in order to prevent the same from adversely affecting the drying process
Implementation Method 3
the scraper can be produced from a flexible material. Thus, a scraper which can be positioned on the inner side of the two filtering surfaces is enabled to be used
Data Source
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AI summary
The present invention relates to a dryer (1) comprising a body (2); a housing (3) which is disposed on the body (2); a filter (4) which is placed into the housing (3) and which retains the fibers generated during the drying process; and a scraper (5) which scrapes the fibers accumulated on the filter (4).