Washing Machine Water Temperature Control for Cold Fill Thresholds
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Solution Overview
Problem
Washing machine appliances using unregulated water temperature options often receive cold water that can be too cold, affecting the dispersion of additives and performance, as it is influenced by ambient temperatures and may result in water below 50-60 degrees Fahrenheit, leading to adverse effects.
Innovation Solution
A washing machine appliance with a temperature sensor and controller that adjusts the water temperature by mixing hot and cold water sources when the unregulated water temperature selection is made and the initial temperature is below a predetermined threshold, ensuring the water temperature is raised to a minimum effective level for additive dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If unregulated water temperature option is selected to save energy, then energy consumption is reduced, but water temperature may drop below effective threshold affecting additive dispersion
Solution Approach 1:
The system uses the cold water source and valve assembly to self-regulate and maintain water temperature above the effective threshold through controlled mixing, eliminating the need for external energy input while ensuring reliable additive dispersion
Solution Approach 2:
The system changes the water temperature parameter by mixing cold water with a portion of the hot water source or by controlling the valve assembly to maintain temperature above the threshold, achieving both energy savings and reliable performance
2Reliability
If regulated water temperature is used to ensure effective additive dispersion, then additive dispersion performance is improved, but energy consumption increases
Solution Approach 1:
The system applies partial heating by mixing cold water with only a portion of hot water or using the valve assembly to control flow, rather than fully regulating temperature, achieving sufficient additive dispersion with reduced energy consumption
Solution Approach 2:
The cold water source and valve assembly work together to self-regulate temperature maintenance, reducing reliance on energy-intensive heating systems while ensuring effective additive dispersion
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 solution ensures that the water temperature is maintained above a threshold that prevents adverse effects on additive dispersion and washing machine performance, even when using unregulated water, thereby improving the washing process.
Implementation Method 1
causing the valve assembly to adjust a temperature of the water flowed through the valve assembly
Data Source
AI summary
Washing machine appliances and methods for operating washing machine appliances are provided. A method includes receiving a desired water temperature selection, and causing water to be flowed through a valve assembly to a nozzle, the nozzle operable to flow water into a tub of the washing machine appliance. The method further includes receiving, when the desired water temperature selection is an unregulated water temperature, an initial sensed water temperature from a temperature sensor, and causing the valve assembly to adjust a temperature of the water flowed through the valve assembly when the desired water temperature selection is an unregulated water temperature and the initial sensed water temperature is below a predetermined temperature threshold.