Laundry Dryer Dry Boost Control for Energy-Efficient Drying Cycles
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Solution Overview
Problem
Modern laundry dryers consume excessive energy and resources due to supplemental drying mechanisms, and existing control systems lack intuitive and efficient methods to balance energy consumption with drying performance, failing to meet user expectations and environmental regulations.
Innovation Solution
A method and system for controlling laundry dryers that include a default low-energy cycle with a Dry Boost option, utilizing a predetermined schedule for supplemental drying and feedback-controlled operations to adjust energy use based on temperature and dryness thresholds, ensuring compliance with energy-saving guidelines while allowing user customization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If supplemental drying mechanisms are used to accelerate the drying process, then drying speed is improved, but energy consumption increases
Solution Approach 1:
The supplemental drying mechanism operates in periodic cycles rather than continuously. The controller alternates between activating the supplemental drying mechanism for a first period of time and deactivating it for a second period of time, creating a pulsed drying action that maintains effectiveness while reducing overall energy consumption.
Solution Approach 2:
The system dynamically adjusts the operation of the supplemental drying mechanism based on real-time sensor feedback. The controller monitors moisture levels, temperature, and other parameters to determine when supplemental drying is needed and when it can be deactivated, optimizing the balance between drying speed and energy consumption.
2Productivity
If the supplemental drying mechanism is operated continuously at high power, then drying performance is improved, but operating cost increases
Solution Approach 1:
The system incorporates sensors that continuously monitor drying progress, moisture levels, and environmental conditions. The controller uses this feedback information to intelligently control the supplemental drying mechanism, activating it only when and where needed, thereby improving drying performance while minimizing operating costs through optimized energy usage.
Solution Approach 2:
Instead of continuous full-power operation, the system applies supplemental drying in partial, targeted bursts. The controller activates the supplemental drying mechanism for specific time periods based on detected needs, providing just enough additional drying capacity to achieve the desired performance without excessive energy consumption.
3Use of energy by moving object
If the dryer defaults to low-energy operation, then energy consumption is reduced, but drying time increases
Solution Approach 1:
The system dynamically transitions between low-energy and high-energy modes based on real-time conditions. The controller monitors drying progress and environmental factors, automatically activating the supplemental drying mechanism when conditions indicate that additional energy input would be beneficial, thus reducing drying time without committing to continuous high-energy operation.
Solution Approach 2:
The system performs preliminary assessment of drying conditions before committing to a drying mode. By monitoring initial moisture levels, ambient conditions, and load characteristics, the controller can determine early in the cycle whether supplemental drying will be needed, allowing for optimized energy usage while preventing excessive drying time.
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 solution provides improved energy efficiency and user-friendly operation by optimizing drying cycles, ensuring compliance with energy-saving certifications and enhancing drying performance when needed, while maintaining a consistent user experience across different load types.
Implementation Method 1
most dryers have a supplemental drying mechanism, such as an electric heating element, a gas heating element, and/or a heat pump dehumidifier, to accelerate evaporation
Implementation Method 2
directing a flow of air over the rotating laundry to remove moisture by evaporation
Implementation Method 3
an electric heating element
Data Source
AI summary
A laundry dryer control method including: setting the dryer to a default drying operation; performing the default drying operation when a user selects the default setting and does not select a dry boost setting; and performing a non-default drying operation when a user selects the default setting and does select a dry boost setting. In default operation, the dryer operates the drum and fan, and operates supplemental drying mechanism according to a predetermined schedule of “on” cycles and “off” cycles. If dry boost is selected, or if another non-default cycle is selected, the dryer operates the drum, fan and supplemental drying mechanism using a temperature feedback control loop, and operates until the laundry reaches a first dryness threshold.