Drying Duct Filter Reversal for Self-Cleaning Lint Control
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Solution Overview
Problem
Conventional clothes treatment apparatuses face inefficiencies and maintenance challenges due to lint accumulation in the drying duct, which can reduce condensing efficiency and cause blower and heater failures, and require user intervention for filter cleaning.
Innovation Solution
Incorporating a filter in the drying duct to remove lint from hot air and implementing a mechanism to reverse air flow direction for self-maintenance, such as using a bypass and switching device, to automatically detect and clear filter clogging based on pressure and temperature differentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter is installed in the drying duct to remove lint, then lint removal efficiency is improved, but device complexity increases due to additional components and maintenance requirements
Solution Approach 1:
The system automatically detects filter clogging through pressure differential sensors and reverses air flow to clean the filter without user intervention. The controller monitors pressure differentials across the filter and automatically initiates reverse flow cleaning when clogging is detected, enabling the system to maintain itself.
Solution Approach 2:
The air flow direction is reversed to clean the filter. During normal operation, air flows in the forward direction through the filter. When clogging is detected, the system reverses the air flow direction to blow accumulated lint off the filter, utilizing the existing air flow mechanism in reverse for maintenance purposes.
2Device complexity
If manual filter cleaning is required, then device complexity is reduced, but loss of time increases due to user intervention requirements
Solution Approach 1:
The system automatically detects filter clogging through pressure differential sensors and initiates reverse flow cleaning without user intervention. The controller continuously monitors pressure differentials across the filter and automatically triggers the cleaning process, eliminating the need for users to manually check and clean the filter.
Solution Approach 2:
Pressure differential sensors provide continuous feedback on filter clogging status to the controller. When the pressure differential exceeds a threshold indicating clogging, the controller receives this feedback and automatically initiates the reverse flow cleaning process, creating a closed-loop maintenance system.
3Device complexity
If lint accumulates in the drying duct, then device complexity remains low, but reliability decreases due to blower and heater failures
Solution Approach 1:
The system automatically detects filter clogging and initiates reverse flow cleaning to prevent lint accumulation that could lead to blower and heater failures. By continuously monitoring pressure differentials and automatically cleaning the filter, the system protects downstream components without requiring additional protective devices.
Solution Approach 2:
The system performs preliminary cleaning action by reversing air flow to remove lint from the filter before it can accumulate further and cause failures. The pressure differential detection system identifies clogging early and triggers cleaning proactively, preventing the conditions that would lead to blower and heater failures.
4Productivity
If the drying cycle runs continuously, then productivity is improved, but use of energy increases due to extended operation time
Solution Approach 1:
The system periodically reverses air flow to clean the filter during the drying cycle. Instead of continuous forward flow, the system implements periodic reverse flow cleaning intervals, allowing the filter to be maintained without significantly extending the overall drying time or energy consumption.
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 reduces treatment time and power consumption, facilitates easy maintenance of the filter, and prevents blower and heater failures by automatically addressing lint accumulation and filter clogging.
Implementation Method 1
a filter (1250) provided near a first side (122a) of the tub (122) to remove lint contained in the air circulating through the drying duct (1210)
Implementation Method 2
a blower fan (1230) located in the drying duct (1210) to enable circulation of interior air of or within the drying duct (1210)
Implementation Method 3
sensing means (1240) to sense clogging of the filter (1250)... measuring a pressure differential of air moving along opposite sides within the drying duct (1210)
Implementation Method 4
measuring a temperature differential of air having passed through the blower fan (1230), and judging whether the filter (1250) is clogged based on the measured temperature differential
Data Source
AI summary
A clothes treatment apparatus and a method for controlling a clothes treatment apparatus are provided. The clothes treatment apparatus may include a drying duct, a first blower fan located in the drying duct that circulates interior air within the drying duct, and a filter located in the drying duct. The method may include sensing clogging of the filter, and switching a flow of air passing through the filter from a first direction to an opposite second direction if clogging of the filter is sensed. The method may further include a washing cycle for washing clothes, and a drying cycle for drying the clothes. An implementation time of the washing cycle may be less than an implementation time of the drying cycle.