Dryer Appliance Self-Clean Cycle for Empty-Chamber Sanitization
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Solution Overview
Problem
Conventional dryer appliances lack a method for periodic cleaning without risking damage to clothes, as the temperatures required for cleaning exceed the limits for most clothing items and do not have operating cycles intended for cleaning.
Innovation Solution
A self-clean cycle is implemented in dryer appliances, where a controller determines the self-clean condition and ensures the drum is empty before operating the air handler and heating assembly to circulate hot air at elevated temperatures, potentially with steam, to clean internal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature is used to clean the dryer appliance, then cleaning effectiveness is improved, but clothes may be damaged
Solution Approach 1:
The controller determines that the chamber is empty before initiating the self-clean cycle. This preliminary check ensures that no clothes are present to be damaged by the high temperatures that will be used for cleaning, thus resolving the contradiction between cleaning effectiveness and protection of clothes.
Solution Approach 2:
The dryer appliance performs self-cleaning without requiring separate manual intervention or removal of clothes by the user. The system automatically detects when the chamber is empty and initiates the cleaning cycle, making the cleaning process self-service while inherently protecting clothes from damage through the empty chamber verification.
2Adaptability or versatility
If a self-clean cycle is added to the dryer appliance, then cleaning functionality is improved, but device complexity increases
Solution Approach 1:
The existing air handler and heating assembly are utilized for both their original drying function and the new self-clean function. By making these components multi-functional, the patent adds cleaning capability without requiring entirely new hardware, thus improving versatility while minimizing the increase in device complexity.
Solution Approach 2:
The controller monitors chamber conditions and determines when the chamber is empty before allowing the self-clean cycle to proceed. This feedback mechanism ensures safe operation and automates the cleaning process, adding functionality while managing complexity through intelligent control rather than mechanical complexity.
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
This method effectively maintains the cleanliness of dryer appliances by removing build-ups and bacteria without damaging clothes, ensuring the appliance's internal components are sanitized and free from odors.
Implementation Method 1
operate the air handler and the heating assembly to perform a self-clean cycle
Implementation Method 2
operate the air handler and the heating assembly to perform a self-clean cycle
Data Source
AI summary
A dryer appliance includes a drum defining a chamber and being rotatably mounted within a cabinet, an air handler for selectively urging a flow of air through the chamber, and a heating assembly for selectively heating the flow of air. A controller is operably coupled to the air handler and the heating assembly and is configured to determine that a self-clean condition is satisfied, determine that the chamber is empty, lock the door, and operate the air handler and the heating assembly to perform a self-clean cycle.