Filter device and refrigerator including the same
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Solution Overview
Problem
The existing refrigerator systems face issues with detecting filter replacement completion and initiating the auto flushing mode accurately, leading to potential water leakage and misassembly problems when unskilled users replace filters.
Innovation Solution
A filter device with a rotating head cover mechanism that interlocks with a switch to ensure complete filter installation before initiating the auto flushing mode, preventing water supply in misassembled states and simplifying the detection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a switch is used to detect whether the cover is attached to the filter device, then the auto flushing mode can be automatically started, but water may leak due to imperfect sealing when the filter is not completely assembled
Solution Approach 1:
The patent introduces an intermediate structure that acts as a mediator between the rotating head cover and the switch. This intermediate structure includes a pressing portion that only contacts and activates the switch when the head cover is in the fully rotated (locked) position, ensuring the filter is completely assembled before the auto flushing mode starts. This resolves the contradiction by adding an intermediary mechanism that prevents premature switch activation.
Solution Approach 2:
The patent implements preliminary action by requiring the head cover to be fully rotated and locked into position before the switch can be activated. The intermediate structure is positioned such that the pressing portion only engages the switch after the head cover has completed its full rotation, ensuring that the filter is properly assembled before water supply begins. This preliminary positioning action prevents water leakage by ensuring proper assembly first.
2Reliability
If a separate detection mechanism is added to ensure complete filter installation, then water leakage can be prevented, but the device complexity increases
Solution Approach 1:
The patent merges the detection function with the existing rotating head cover mechanism. Instead of adding a completely separate detection system, the patent utilizes the rotational movement of the head cover itself to activate the switch through the intermediate structure. This integration approach verifies filter installation completeness while minimizing additional complexity by combining functions rather than adding independent systems.
Solution Approach 2:
The patent implements self-service by making the existing head cover rotation mechanism serve the dual purpose of both securing the filter and triggering the detection system. The intermediate structure is designed to be automatically activated by the head cover's own rotational movement, eliminating the need for external power sources or complex electronic sensors. The system uses its own operational movement to verify proper installation.
3Productivity
If the switch is activated by the rotating head cover, then the filter installation and replacement detection are synchronized, but the switch may be activated prematurely if the filter is not completely assembled
Solution Approach 1:
The intermediate structure serves as a precision mediator that translates the rotational movement of the head cover into a controlled switch activation. It includes a pressing portion positioned at a specific distance from the switch, ensuring that only when the head cover is fully rotated does the pressing portion make contact with the switch. This intermediary mechanism maintains the synchronization benefit while improving measurement precision by preventing premature activation.
Solution Approach 2:
The patent replaces complex electronic detection systems with a simple mechanical linkage approach. The intermediate structure uses mechanical geometry and positioning to ensure the switch is only activated when the head cover reaches the correct rotational position. This mechanical substitution maintains synchronization efficiency while improving accuracy through precise mechanical design rather than electronic sensing.
Data Source
AI summary
A filter device for a refrigerator includes a switch, which detects whether a filter is installed, is turned on or off interlocking with rotation of a head cover, so that an operation for detecting whether the filter is completely installed and an operation for detecting a replacement completion signal of the filter can be synchronized with each other.