Washing machine ventilation systems and methods
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Solution Overview
Problem
Existing washing machine appliances face limitations in ventilation, leading to residual moisture accumulation, which can cause odor, mold, and mildew growth, especially when the door is closed, as airflow is restricted and moisture may still be trapped.
Innovation Solution
A method and system that includes a rotating wash basket to draw ambient air into a vent line, with a humidity sensor controlling the rotation based on a reference humidity value, ensuring effective ventilation without the need for the door to be open, thereby reducing moisture levels within the appliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door is left open to improve airflow and prevent moisture accumulation, then ventilation effectiveness is improved, but usable space is limited and appearance is compromised
Solution Approach 1:
The ventilation system is segmented into multiple independent airflow paths: an aperture in the cabinet for external air intake, a vent line extending into the wash tub for internal circulation, and the rotating wash basket as a separate agitation component. This segmentation allows effective ventilation through the closed door while preserving usable space.
Solution Approach 2:
A vent line acts as an intermediary element, extending from the cabinet interior through the closed door aperture to reach into the wash tub. This intermediary structure enables airflow communication between the external environment and the enclosed wash chamber without requiring the door to be open, thus maintaining both ventilation effectiveness and space utilization.
2Reliability
If the door is left open to improve airflow, then moisture accumulation is reduced, but the appliance cannot be covered or hidden
Solution Approach 1:
The system performs preliminary ventilation action through the aperture and vent line before the door needs to be opened for use. The rotating wash basket creates airflow that draws moisture-laden air through the vent line and out the aperture during closed-door operation, preventing moisture accumulation in advance and allowing the door to remain closed for aesthetic purposes.
Solution Approach 2:
The washing machine performs self-ventilation through its own rotating wash basket, which naturally creates airflow that draws moisture out through the vent line and aperture. This self-service mechanism eliminates the need for external intervention (opening the door) to achieve moisture prevention, allowing the door to remain closed while maintaining both aesthetics and moisture control.
3Reliability
If a ventilation system is added to reduce moisture accumulation, then moisture control is improved, but device complexity increases
Solution Approach 1:
The wash basket serves multiple functions: it performs the primary washing function and simultaneously acts as a ventilation mechanism. During rotation, the wash basket creates airflow that draws moisture-laden air through the vent line and out the aperture, eliminating the need for a separate ventilation fan or motor while achieving effective moisture control.
Solution Approach 2:
The ventilation system is self-powered by the rotation of the wash basket during normal washing operations. The mechanical motion of the wash basket itself generates the airflow needed for ventilation, eliminating the need for additional powered components and reducing overall system complexity while maintaining effective moisture control.
4Ease of operation
If passive ventilation is used with the door closed, then space is preserved, but moisture may still be trapped in certain portions
Solution Approach 1:
The system transitions from static passive ventilation to dynamic active ventilation. The rotating wash basket creates dynamic airflow patterns that actively draw moisture-laden air through the vent line and out the aperture, ensuring thorough moisture removal from all portions of the wash chamber while the door remains closed for space utilization.
Solution Approach 2:
The rotation of the wash basket creates mechanical motion and turbulence in the air flow, enhancing the ventilation effect. This mechanical action disrupts stagnant air pockets and ensures that moisture is effectively drawn from all areas of the wash tub through the vent line, preventing trapped moisture while maintaining a closed door.
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 approach enhances ventilation efficiency, reducing moisture accumulation and preventing odor and mildew growth while maintaining a closed door, thus preserving space and aesthetics, and shortening the ventilation cycle duration compared to passive methods.
Implementation Method 1
rotating the wash basket for an ON period. As a result of such rotation, a flow of ambient air is drawn through the aperture from the ambient environment into the wash basket, and the flow of ambient air is urged into a vent line extending between the wash basket and the cabinet
Data Source
AI summary
Washing machine appliance ventilation systems and methods include rotating a wash basket of the washing machine appliance for an ON period, whereby a flow of ambient air is drawn through an aperture in the washing machine appliance from an ambient environment into the wash basket. The systems and methods also include comparing a humidity within the washing machine appliance to a reference humidity value. When a difference between the humidity within the washing machine appliance and the reference humidity value is greater than a threshold, the step of rotating the wash basket for the ON period is repeated. When the difference between the humidity within the washing machine appliance and the reference humidity value is less than or equal to the threshold, the ventilation cycle or method is terminated.