Appliance Control Power Isolation After Program Completion
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Solution Overview
Problem
Domestic appliances such as dishwashers and washing machines continue to consume energy after program execution, lacking an efficient method to power off control devices and reduce energy usage.
Innovation Solution
Incorporating a switching mechanism to isolate the control device from the power supply after program completion, with optional delay elements for signaling and manual timing, allowing for separate control of operating and display modules and device components to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control device remains powered on after program execution, then the appliance can immediately respond to user inputs and provide continuous monitoring, but energy consumption continues unnecessarily
Solution Approach 1:
The control device is divided into two separate switching means: a first switching means that powers off the control device after program execution, and a second switching means (main switch) that powers off the entire appliance. This segmentation allows the control device to be completely disconnected from power after use, eliminating standby energy consumption while maintaining full functionality during operation.
2Use of energy by moving object
If the control device is powered off immediately after program execution, then energy consumption is reduced, but the user cannot receive program completion signals or make immediate adjustments
Solution Approach 1:
The first switching means is configured to power off the control device after a predetermined period following program execution. This preliminary delay allows the control device to remain powered on long enough to provide program completion signals and allow user adjustments, then automatically powers off to conserve energy. The delay period is optimized to balance signaling needs with energy conservation.
Data Source
AI summary
A domestic appliance having a control device to control device components of the domestic appliance during execution of a program, wherein the device components have electrical loads. The domestic appliance also has a switch to at least partly de-energize the control device after the program has finished executing.