RFID Laundry Tracking in Dryers for Even Drying Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dryers face issues with uneven laundry distribution and rolling due to varying item sizes, leading to irregular drying results, increased energy consumption, and difficulty in monitoring the position of laundry during the drying process.
Innovation Solution
A dryer equipped with at least three RFID reading units and a controller to track the location and movement of RFID transponders attached to laundry items, allowing for real-time monitoring and adjustment of the drying process to prevent rolling and uneven distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional dryers without monitoring systems are used, then the device complexity is low, but the drying uniformity and quality are poor due to uneven laundry distribution
Solution Approach 1:
The patent replaces mechanical monitoring systems with RFID electromagnetic field-based tracking. RFID readers detect transponders attached to laundry items wirelessly, eliminating the need for complex mechanical sensors or cameras inside the drum, thus improving drying uniformity while keeping device complexity low.
Solution Approach 2:
The patent introduces RFID transponders as intermediaries attached to laundry items. These transponders enable the dryer's control system to track item positions and detect rolling behavior without direct mechanical contact or complex imaging systems, achieving precise monitoring with simplified hardware.
2Measurement precision
If laundry items are monitored using camera systems, then the position tracking capability is improved, but the device complexity increases and only front items are visible
Solution Approach 1:
The patent replaces camera-based optical monitoring with RFID electromagnetic field detection. RFID readers can detect transponders on all laundry items throughout the drum volume simultaneously, providing complete position tracking without the line-of-sight limitations of cameras and with significantly reduced system complexity.
3Loss of energy
If no real-time monitoring is implemented, then the device complexity remains low, but the energy consumption increases due to inability to adjust drying parameters
Solution Approach 1:
The patent implements a feedback system where RFID readers continuously track laundry item positions and provide real-time data to the control unit. The control unit processes this information and adjusts drying parameters such as drum rotation speed and heater power dynamically, optimizing energy consumption while preventing rolling through timely interventions.
Solution Approach 2:
The patent makes the drying system dynamic by enabling real-time adjustment of operating parameters based on detected laundry distribution. The drum rotation speed and heater power are continuously adapted during the drying cycle according to RFID tracking data, allowing the system to respond to changing conditions and minimize energy waste.
4Manufacturing precision
If drum rotation speed is increased to prevent rolling, then the drying uniformity improves, but the energy consumption and mechanical stress increase
Solution Approach 1:
The patent uses dynamic, variable drum rotation speeds instead of continuously high speeds. The control unit adjusts the rotation speed in real-time based on RFID-detected laundry distribution, applying higher speeds only when and where needed to prevent rolling, and reducing speeds when laundry is properly distributed, thus maintaining drying uniformity while minimizing 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
Enables precise tracking and adjustment of laundry distribution, optimizing the drying process by adapting drying parameters such as time, temperature, and drum rotation to ensure even drying and minimize energy consumption.
Implementation Method 1
at least three RFID reading units for reading information from at least one RFID transponder located in the drum
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a dryer 1 with a drum 3 for laundry items 22 to be dried, a controller 10, a process air duct 2, in which there is a heater 4 for heating the process air and a blower 6 for conveying the process air, the dryer having at least three RFID reading units 24, 25, 26 for reading information from at least one RFID transponder 23, 23', 23", 23"', 23"", 27 located in the drum. The invention also relates to a dryer suitable for carrying out this method.