Method for controlling the operation of a washing machine, and system for controlling freezes for a washing machine
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Solution Overview
Problem
Washing machines face operational issues due to water freezing in low-temperature environments, leading to malfunctioning of water supply and drain systems, which existing methods struggle to address effectively.
Innovation Solution
A method and system for controlling washing machine operations that includes a temperature sensing mechanism to detect internal temperatures, draining excess water before supply, and using self-heating to prevent freezing, allowing for accurate detection and prevention of water freezing through error messages and operational suspension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the washing machine operates in low-temperature environments, then productivity is maintained, but the water supply system and drain system freeze causing operational failure
Solution Approach 1:
The control unit performs preliminary temperature sensing before initiating washing operations. When the temperature is sensed to be at or below a predetermined threshold (e.g., 0°C), the control unit preemptively prevents operation by displaying a freezing warning message, thereby avoiding freeze-related failures before they occur
Solution Approach 2:
The washing machine incorporates a temperature sensing unit that continuously monitors the internal temperature and provides feedback to the control unit. This feedback mechanism enables real-time detection of freezing conditions and triggers appropriate responses (warning messages or operation suspension) to maintain system reliability
2Measurement precision
If temperature sensing is performed multiple times at each operational step, then measurement precision of freezing conditions is improved, but device complexity increases
Solution Approach 1:
The control unit performs temperature sensing at multiple periodic intervals throughout the washing cycle (e.g., before water supply, during draining, and at other operational steps). This periodic measurement approach ensures accurate detection of freezing conditions without requiring complex continuous monitoring hardware
3Reliability
If the washing machine suspends operation when freezing is detected, then reliability is improved, but productivity is reduced
Solution Approach 1:
The control unit applies preliminary anti-action by detecting freezing conditions and suspending operations before actual freeze damage can occur. When the temperature sensor detects that the internal temperature has reached or fallen below the freezing point, the control unit immediately prevents further operation and displays a warning message, thereby protecting the water supply and drain systems from freeze-related failures
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
Prevents washing machine freezing by accurately sensing temperature drops, ensuring water does not freeze, and maintaining operational safety by suspending operations when freezing is detected, thus preventing long-term freezing and ensuring efficient operation in low-temperature conditions.
Implementation Method 1
a temperature sensing unit to sense an internal temperature of the washing machine
Implementation Method 2
comparing the internal temperature of the washing machine with a reference temperature... when the internal temperature of the washing machine is lower than the reference temperature
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a method for controlling the operation of a washing machine, which ensures the operation stability of the washing machine through proper control such as sensing freezes or preventing freezes even in an environment such as in a wintertime environment in which the temperature is low causing the washing machine to freeze, and which achieves an improvement in a management aspect such as a countermeasure taken upon the occurrence of freezing and a countermeasure taken for preventing freezing, wherein the counter measures are taken based on the accurate information on whether or not the washing machine is frozen.