Washing Machine Door Venting System to Reduce Mold and Mildew Buildup
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Solution Overview
Problem
Residual water in washing machine appliances can lead to mold and mildew buildup, causing undesirable odors and black spots on clothes, particularly on white items, due to the accumulation of moisture in the gasket and sump volume.
Innovation Solution
A venting system is integrated into the washing machine, featuring a door frame with vent apertures and a venting grill that allows for passive and active airflow into the interior volume, reducing humidity and preventing mold and mildew growth by circulating fresh air and expelling humid air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door is sealed tightly to prevent water leakage, then sealing performance is improved, but moisture accumulates inside the tub leading to mold and mildew buildup
Solution Approach 1:
The door frame incorporates vent apertures that allow controlled airflow through the door structure. These apertures enable moisture to escape from the interior volume while maintaining the door's structural integrity and sealing capability during washing operations.
Solution Approach 2:
A venting grill is introduced as an intermediary component between the interior volume and the external environment. The grill receives airflow from the vent apertures and directs it toward the sump area, facilitating moisture removal without compromising the door's primary sealing function.
2Object-affected harmful factors
If vent apertures are added to the door frame to allow airflow, then moisture removal is improved, but the door structure becomes more complex
Solution Approach 1:
The venting function is segmented into distinct components: vent apertures in the door frame and a separate venting grill. This segmentation allows each component to perform its specific function efficiently while keeping the overall design manageable and maintainable.
Solution Approach 2:
The door frame serves multiple functions: it provides structural support for the door, maintains sealing during washing, and incorporates vent apertures for moisture removal. The venting grill similarly serves both as a protective cover and an airflow distribution device.
3Productivity
If a venting grill with multiple apertures is installed, then airflow distribution is improved, but manufacturing complexity increases
Solution Approach 1:
The venting grill is designed with multiple apertures distributed across its surface, creating a porous-like structure that facilitates uniform airflow. This design allows moisture to be removed efficiently from various areas of the interior volume simultaneously.
Solution Approach 2:
The venting grill appears to be designed as a relatively simple, possibly disposable component that can be easily manufactured and replaced if needed. The use of standard aperture patterns and common materials keeps manufacturing costs low despite the multiple openings.
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 venting system effectively reduces humidity within the washing machine, minimizing the risk of mold and mildew formation and associated odors, thereby maintaining cleaner and fresher laundry.
Implementation Method 1
a venting system that allows for passive and active airflow into the interior volume, reducing humidity and preventing mold and mildew growth by circulating fresh air and expelling humid air
Data Source
AI summary
A washing machine appliance equipped with a venting system is provided. The venting system includes features for venting or expelling relatively humid air from a subwasher of the washing machine appliance, e.g., at the completion of a wash cycle. In one example aspect, a door of the washing machine appliance defines a plurality of vent apertures that allow for fresh air from an ambient environment to flow into an interior volume of the subwasher. The vent apertures extend through the door and fluidly connect the ambient environment with the interior volume. The relatively low humidity fresh air that flows into the interior chamber mixes with the relatively humid air within the interior volume. The mixed air is expelled from the washing machine appliance via a venting conduit.