Household appliance comprising detachable means before being removed for maintenace
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Solution Overview
Problem
Users often forget to perform maintenance operations on household appliances, such as descaling steam generators, leading to premature appliance failure, despite the presence of maintenance indicators, and existing detection methods are complex and costly.
Innovation Solution
A household appliance with a detection device using a simple and inexpensive electric switch and electronic control circuit to verify the removal of a removable member, such as a drain plug, which changes switching states upon removal and reset, ensuring maintenance is performed before the appliance can be used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a maintenance indicator light is provided to alert users, then users are reminded to perform maintenance, but users may still press the reset button without actually performing maintenance
Solution Approach 1:
The patent implements a detection device that provides feedback by monitoring the switching state of an electrical component (such as a drain plug) to verify whether maintenance operations have actually been performed. The electronic control circuit compares the current switching state with the stored state to determine if the removable member has been removed and reinstalled, providing reliable confirmation of maintenance completion rather than relying solely on user input to reset the indicator.
Solution Approach 2:
The detection device automatically monitors and detects whether maintenance has been performed without requiring user intervention to report completion. The system self-verifys the maintenance operation by detecting the removal and reinstallation of the removable member through the electrical switch state changes, eliminating the need for users to manually reset the indicator after maintenance.
2Reliability
If complex detection means are used to detect maintenance operations, then detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the detection function from complex specialized sensors and implements it using the existing electrical switch component that is already part of the appliance's normal operation. By utilizing the inherent electrical connectivity changes when a removable member (like a drain plug) is removed or installed, the system achieves accurate maintenance detection without adding complex dedicated detection hardware.
Solution Approach 2:
The electrical switch serves multiple functions: it controls the normal operation of the appliance and simultaneously acts as a detection mechanism for maintenance operations. The same electrical component that controls device functionality also provides the signal for detecting whether maintenance has been performed, eliminating the need for separate specialized detection devices.
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 solution is reliable, economical, and ensures that maintenance is carried out, preventing scale buildup and extending appliance life by requiring users to perform maintenance before the device can operate fully.
Implementation Method 1
a return spring in the absence of the member on the device
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to an electrical household appliance including a removable member (7) that needs to be removed in order to perform a maintenance operation, and an indicator (9) automatically activated by the appliance in order to alert the user of the need to perform the maintenance operation, the apparatus including an electric switch (8) which comprises a push button (80) and which can occupy at least two different switching states when the push button (80) is actuated, and in that the appliance includes an electronic control circuit including a memory in which the switching state of the switch is stored (8) when the indicator is activated, and which, when the appliance is switched on, launches a test phase in which it compares the switching state of the switch (8) with that stored in the memory in order to deduce the removal of said member (7) when the switching state of the switch (8) has changed.