Dryer Humidity Monitoring for Accurate Textile Dryness Control
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Solution Overview
Problem
Conventional clothes dryers lack accurate control over drying cycles, leading to underdrying or over drying, which results in energy inefficiency, premature textile degradation, and increased energy costs, as users struggle to estimate the required drying time for various textiles.
Innovation Solution
A dryer monitor equipped with humidity and temperature sensors that detect dryness levels and count dryer cycles, alerting users when textiles are dry or overdry, and notifying them when multi-cycle laundry products need replacement, thereby optimizing drying efficiency and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a timer controls the drying cycle duration, then the device complexity is reduced, but the manufacturing precision of dryness determination deteriorates
Solution Approach 1:
The patent employs humidity sensors that continuously monitor moisture levels in the dryer and provide feedback to the control system. This feedback mechanism allows the dryer to automatically adjust the drying cycle duration based on actual dryness conditions, resolving the contradiction by maintaining simple operation while achieving precise dryness determination through sensor-based feedback control.
2Reliability
If the drying cycle length is extended to ensure complete dryness, then the reliability of dryness achievement is improved, but the use of energy increases
Solution Approach 1:
Humidity sensors provide real-time feedback on moisture levels, enabling the control system to terminate the drying cycle as soon as the desired dryness level is achieved. This prevents unnecessary extended cycling and energy consumption while reliably ensuring complete dryness when needed.
Solution Approach 2:
The patent replaces mechanical timing-based control with sensor-based electronic control. Instead of relying on predetermined time cycles that consume excessive energy, the system uses humidity sensors to detect actual dryness conditions and dynamically adjust the cycling duration, reducing energy consumption while maintaining reliability.
3Use of energy by moving object
If the drying cycle is shortened to reduce energy consumption, then the use of energy is reduced, but the reliability of achieving desired dryness deteriorates
Solution Approach 1:
The humidity sensor feedback system continuously monitors dryness levels and extends the drying cycle automatically if the desired dryness threshold has not been reached. This ensures reliable dryness achievement while minimizing energy consumption by avoiding both premature termination and unnecessary extension of the drying cycle.
4Measurement precision
If sensors are placed inside the dryer drum to detect textile dryness, then the measurement precision of dryness is improved, but the device complexity increases
Solution Approach 1:
The patent uses humidity sensors that detect moisture levels in the air within the dryer drum as an intermediary method to infer textile dryness. Rather than directly sensing the textiles themselves, the sensors measure the surrounding environment's humidity, providing accurate dryness information while maintaining relatively simple device architecture.
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
The dryer monitor ensures accurate determination of dryness, prevents over-drying, conserves energy, reduces textile damage, and minimizes excess energy costs by providing real-time feedback and cycle counting, enhancing operational efficiency in commercial laundry settings.
Implementation Method 1
a humidity sensor that senses humidity information concerning humidity levels associated with a dryer
Implementation Method 2
a temperature sensor that senses temperature information concerning a temperature associated with the dryer
Implementation Method 3
The textiles are dried by forcing heated air onto the wet laundry rotating with the drum. Moisture is removed along with the air exiting the dryer
Data Source
AI summary
A dryer monitor detects when textiles in a dryer are dry, detects when textiles in a dryer are overdry, and/or may count dryer cycles. The dryer monitor includes a humidity sensor, a temperature sensor, a controller and various status indicators. The humidity and temperature sensors may be located outside the drying compartment of the dryer. In the case of a clothes dryer, the humidity and temperature sensors may be located outside the drum of the dryer and may be located, for example, in the exhaust compartment of the dryer. The dryer monitor determines dryness of items in the dryer, and may also determine whether the items are overdry, based on humidity information received from the humidity sensor. The dryer monitor counts dryer cycles based on temperature information received from the temperature sensor.