Steam Dryer Pump Fault Detection for Reliable Crease Removal
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Solution Overview
Problem
Conventional laundry dryers fail to completely remove creases and crumples from clothes, requiring additional pressing, and there is a need for an appliance that can prevent crease formation during storage and use.
Innovation Solution
A laundry machine equipped with a steam generator and a control system that includes a selectively rotatable drum and a controller to determine if the pump is out of order by measuring the time required to supply water to a preset level or the current to the pump, ensuring proper operation and preventing crease formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional laundry dryer is used to dry clothes, then the drying function is achieved, but creases and crumples remain on the clothes requiring additional pressing
Solution Approach 1:
The patent introduces steam generation functionality that changes the thermal and humidity parameters during the drying process. By injecting steam into the drum, the clothes are exposed to moist heat that relaxes fibers and prevents crease formation, thereby improving the final appearance quality without requiring separate pressing operations
Solution Approach 2:
The steam generation occurs continuously or periodically during the drying cycle, maintaining a consistent humid environment throughout the process. This continuous exposure to steam ensures that creases are prevented throughout the entire drying duration, not just at specific stages
2Reliability
If a steam generator is added to the laundry dryer to prevent creases and sterilize clothes, then crease prevention and sterilization are achieved, but the device complexity increases
Solution Approach 1:
The patent combines the steam generation function with the existing drying system by integrating a water tank and heating element into the dryer structure. The steam is generated within the dryer chamber and distributed through existing air circulation systems, merging multiple functions (drying, steam generation, humidification) into a unified system
Solution Approach 2:
The steam generation system serves multiple purposes: preventing creases during drying, sterilizing clothes, and humidifying the drying environment. This multi-functional approach allows a single added component system to address multiple customer needs, justifying the increased complexity through enhanced versatility
3Reliability
If the controller monitors pump operation by measuring water supply time or current to detect pump faults, then system safety is improved, but the control complexity increases
Solution Approach 1:
The controller continuously monitors pump operation parameters (water supply time or current consumption) and compares them against expected ranges. When deviations indicate potential pump failures, the system provides feedback signals to alert the user or adjust operation, creating a closed-loop monitoring system that enhances safety through real-time detection
Solution Approach 2:
The system performs self-diagnosis by automatically monitoring its own pump component through built-in sensors and control logic. The controller detects pump abnormalities without external intervention and can autonomously respond by adjusting steam generation or notifying the user, allowing the system to monitor and protect itself
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 laundry machine effectively prevents crease formation and sterilizes clothes by using steam, while the control system enhances safety by detecting pump faults and preventing system failures, thus improving the efficiency and safety of the drying process.
Implementation Method 1
a steam generator for generating steam
Implementation Method 2
heating means for heating air introduced to the drum
Implementation Method 3
a pump for guiding water from the water supply source to the steam generator
Data Source
AI summary
A laundry machine including a selectively rotatable drum, a pump for supplying water to a steam generator, and a controller for determining if the pump is out of order. This determination is made by monitoring either a time period required for supplying water to a preset water level of the steam generator or electric current drawn by the pump.