Clothes Dryer Moisture Control with Programmable Dryness Selector
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Solution Overview
Problem
Clothes dryers lack user control over moisture levels during the drying cycle, leading to inefficient energy use and potential over-drying or under-drying of clothing.
Innovation Solution
A clothes dryer with a programmable dryness level selector, sensors to monitor moisture content, and a controller to automatically stop the cycle based on preset dryness levels, allowing real-time display and customizable target moisture settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the dryer operates without moisture sensing and automatic control, then the device complexity is reduced, but the manufacturing precision of moisture content control deteriorates
Solution Approach 1:
The dryer system performs self-monitoring and self-adjustment of the drying process. The moisture sensor continuously detects fabric moisture content and automatically feeds this information to the controller, which adjusts drying parameters without requiring constant user intervention or complex manual control mechanisms.
Solution Approach 2:
The system implements a closed-loop feedback control mechanism where the moisture sensor provides real-time moisture content data to the controller, which then automatically adjusts drying parameters. This feedback loop enables precise moisture control while keeping the control system relatively simple through automated decision-making algorithms.
2Measurement precision
If the dryer continuously monitors and displays moisture content, then the measurement precision is improved, but the use of energy increases
Solution Approach 1:
The moisture sensor and display operate periodically rather than continuously. The system monitors moisture content at regular intervals during the drying cycle and updates the display only when significant changes occur, reducing energy consumption while maintaining sufficient measurement precision for effective control.
3Productivity
If the dryer automatically stops based on moisture content, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The dryer autonomously determines when the drying cycle should stop based on moisture content thresholds. The controller automatically compares real-time moisture readings against target values and terminates the cycle without user intervention, improving productivity while using straightforward comparison logic rather than complex control algorithms.
4Ease of operation
If the dryer provides real-time moisture display and automatic control, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The system uses a simple visual display that copies or represents the complex internal moisture state in an easily understandable format for the user. The display shows moisture content levels and cycle status using intuitive visual indicators, allowing users to monitor and control the drying process without needing to understand the complex sensor and controller operations.
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 users to precisely control drying cycles, optimizing energy use and ensuring clothes are dried to the desired moisture level, enhancing user satisfaction and energy efficiency.
Implementation Method 1
sensing a remaining moisture content of the load of fabric in the clothes dryer
Data Source
AI summary
A method of controlling the clothes dryer includes offering one or more preset dryness levels that may be selected using a programmable dryness level selector to establish a drying cycle. Each of the preset dryness levels may correspond to a stored remaining moisture content. The method additionally includes sensing a remaining moisture content of a load of fabric in the clothes dryer and displaying the remaining moisture content of the load of fabric to a user. The method further includes automatically stopping the clothes dryer using a controller configured to determine when the remaining moisture content of the load of fabric reaches the selected preset dryness level. The one or more preset dryness levels may be customizable by saving a target remaining moisture content for each preset dryness level.