Dryer Filter Brush Assembly for Self-Cleaning Airflow Control
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Solution Overview
Problem
Conventional dryers face challenges in maintaining airflow rates and efficient filter cleaning due to accumulation of foreign substances like lint, which can lead to reduced drying efficiency and potential filter breakdowns, especially when manual cleaning is infrequent.
Innovation Solution
The dryer incorporates a filter assembly with a brush frame that rotates to separate foreign substances, a filter cleaning region, and a foreign substance compression region, optimized to maintain airflow rates and extend filter cleaning intervals by confining the brush's movement within the filter cleaning region and using sensors to detect accumulation and potential malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual filter cleaning is performed periodically, then the filter can be maintained, but the cleaning process is cumbersome and may not be performed frequently enough, leading to reduced airflow rates
Solution Approach 1:
The filter assembly performs self-cleaning through an automated brush mechanism that rotates to remove foreign substances from the filter screen. The brush is driven by a motor and controlled by a controller that activates it based on sensor detection or timing, eliminating the need for manual user intervention to clean the filter.
Solution Approach 2:
The manual mechanical cleaning process is replaced with an automated electromechanical system consisting of a motor-driven brush, sensors, and a controller. This substitution transforms the manual operation into an automated system that can detect and clean the filter without user involvement.
2Object-generated harmful factors
If the filter accumulates foreign substances, then filtration occurs, but the accumulated substances interfere with air discharge and reduce airflow rate
Solution Approach 1:
The brush cleaning mechanism operates continuously or periodically to maintain the filter screen free of accumulated foreign substances. This continuous maintenance ensures that the filter remains effective at capturing lint while preventing buildup that would restrict airflow, thus maintaining both filtration performance and airflow rate.
Solution Approach 2:
Sensors detect the accumulation of foreign substances on the filter and provide feedback to the controller. The controller then activates the brush mechanism to clean the filter when accumulation reaches a level that would affect airflow, creating a feedback loop that maintains optimal filter performance.
3Ease of operation
If the brush frame rotates to clean the filter, then foreign substances are separated, but the brush must be confined to a specific region to prevent filter breakage
Solution Approach 1:
The brush frame is designed with an asymmetric rotation path where the rotational axis is offset from the center of the filter screen. This asymmetric configuration allows the brush to contact and clean the filter surface effectively while following a controlled arc that prevents excessive force or improper contact angles that could damage the filter.
Solution Approach 2:
The brush mechanism is designed to gently pre-clean the filter surface before more intensive cleaning occurs. The gradual rotational movement allows the brush to progressively remove foreign substances without applying sudden or excessive force that could tear or damage the filter screen.
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 design enhances airflow rates, increases filter cleaning efficiency, prevents filter breakage, and allows for more effective accumulation and compression of foreign substances, thereby improving drying efficiency and extending filter cleaning intervals.
Implementation Method 1
a brush that is supported by the brush frame and configured to separate the foreign substance from the filter portion
Implementation Method 2
a foreign substance compression region configured to receive the foreign substance that has separated from the filter portion
Data Source
AI summary
A dryer includes a cabinet, a drum rotatably provided in the cabinet, a duct that defines a flow passage for air exiting the drum, and a filter assembly located at a position relative to the flow passage and contacting air that has exited the drum. The filter assembly includes a case defining the filter assembly, a filter portion configured to filter foreign substance from the air contacting the filter assembly, a brush frame configured for rotational movement relative to the case about a rotational axis, and a brush that is supported by the brush frame and configured to separate the foreign substance from the filter portion. A first distance from a first side of the case to the rotational axis of the brush frame is longer than a second distance from a second side of the case to the rotational axis of the brush frame.