Clothes dryer and method for controlling the same
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Solution Overview
Problem
Conventional clothes dryers require users to manually select drying options based on the characteristics of clothes, which can lead to incomplete drying, damage from excessive heat, or power wastage due to inappropriate temperature and time settings.
Innovation Solution
A clothes dryer equipped with a weight detection sensor and moisture content detection circuit that automatically determines the optimal drying level by monitoring residual moisture content, allowing for an optimized drying cycle based on the characteristics of the clothes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual option selection is used for drying, then user control over drying parameters is improved, but ease of operation deteriorates due to the burden of identifying characteristics and selecting appropriate options
Solution Approach 1:
The drying system automatically detects drying item characteristics (weight, moisture content) and determines optimal drying parameters without user intervention. The controller autonomously selects drying time and temperature based on sensor data, making the system self-serve the user by eliminating manual option selection while maintaining appropriate drying control
Solution Approach 2:
The system continuously monitors drying progress through moisture content sensors and weight detection, using this feedback to dynamically adjust drying parameters. The controller compares current moisture levels with target values and modifies heating and airflow accordingly, creating a closed-loop control system that adapts to actual drying conditions
2Productivity
If inappropriate drying time is used, then productivity is improved by shorter cycles, but reliability deteriorates due to incomplete drying or damage from excessive heat
Solution Approach 1:
The moisture content detection circuit continuously monitors the drying item's moisture levels and provides feedback to the controller. The controller adjusts drying time and temperature in real-time based on this feedback, extending the cycle only as long as necessary to achieve complete drying while preventing overheating damage, thus optimizing both productivity and reliability
Solution Approach 2:
The drying system dynamically adjusts its operating parameters (temperature, airflow, time) based on real-time sensor measurements. Rather than using fixed predetermined cycles, the system adapts its drying profile to match the actual moisture removal rate and item characteristics, allowing flexible optimization of drying time and quality
3Manufacturing precision
If weight detection and moisture monitoring are implemented, then manufacturing precision is improved through automatic parameter determination, but device complexity increases due to additional sensors and control circuits
Solution Approach 1:
The controller serves multiple functions: it processes weight sensor data, monitors moisture content readings, determines drying item characteristics, calculates optimal drying parameters, and controls heating and airflow. By consolidating these diverse functions into a single control unit, the system achieves precise automatic parameter determination without proportionally increasing overall device complexity
Solution Approach 2:
The system replaces manual mechanical operation (user selection of drying options) with automated electronic sensing and control. Weight sensors and moisture detection circuits electronically measure physical properties, and the controller computationally determines optimal parameters, substituting electronic automation for manual mechanical selection processes
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
Ensures clothes are dried at appropriate temperatures and times without user intervention, minimizing damage and power wastage while enhancing drying quality.
Implementation Method 1
a weight detection sensor configured to detect a weight of the drying item in the drum
Implementation Method 2
a moisture content detection circuit configured to obtain residual moisture content information about the drying item in the drum
Implementation Method 3
a heat pump system including a compressor may comprise controlling an operation of the compressor
Data Source
AI summary
A clothes dryer comprises a drum, a weight detection sensor, a moisture content detection sensor, and a controller. The controller is configured to determine a category for the drying item among a plurality of categories based on the weight of the drying item detected by the weight detection sensor and the residual moisture content information about the drying item obtained by the moisture content detection sensor at a first predetermined time after an initial drying cycle is initiated according to an initial control condition, monitor a reduction state in the residual moisture content information about the drying item obtained by the a moisture content detection circuit based on a reference time and a moisture content threshold defined corresponding to the determined category to determine a drying level for the drying item, and then initiate a main drying cycle according to the control condition corresponding to the determined drying level.