Refrigerator Static Switch Control Against Moisture False Inputs
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Solution Overview
Problem
Refrigerators can malfunction due to input signals generated by variations in electricity capacity caused by external moisture, leading to unintended control operations.
Innovation Solution
A malfunction preventing device and method that ignore initial input signals during a wait mode, cancel the wait mode, and restart it if no further signals are received within a predetermined time, ensuring user-intended inputs are processed while preventing malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a static electricity switch is used to sense user input, then the control device can be operated without direct contact, but electric capacity varies due to external moisture causing false input signals
Solution Approach 1:
The control device enters a wait mode before executing control operations to preliminarily filter out false signals. When a first input signal is detected, the system waits for a predetermined time to see if a second input signal follows. This preliminary waiting action distinguishes between momentary moisture-induced signals and intentional user inputs, resolving the contradiction between contactless operation and control accuracy.
2Productivity
If the control device responds to all input signals, then user inputs are processed immediately, but malfunctions occur due to spurious signals from moisture
Solution Approach 1:
The system uses a feedback mechanism where the detection of a first input signal triggers a wait mode, and the subsequent detection or non-detection of a second input signal determines the final control action. This feedback loop allows the system to differentiate between false signals (which disappear after the wait period) and genuine user inputs (which are reinforced by a second signal), thereby maintaining both rapid response and system stability.
Data Source
AI summary
The present invention relates to a malfunction preventing device and a method thereof, which ignores an input signal produced by electricity capacity variation because of moisture to prevent a malfunction of a refrigerator. A malfunction preventing device for a refrigerator includes an inputting part in which a static electricity switch is provided to produce an input signal, and a controlling part that ignores a first input signal inputted in a wait mode, wherein there is no inputted signal from the inputting part for a predetermined delaying time period in the wait mode. A method for preventing a malfunction of a refrigerator includes performing a wait mode in that there is no input signal produced by static electricity for a predetermined delay time period, and ignoring a first input signal inputted in the wait mode.