Sanitary Fitting Cap Detection for Filter Life Indication
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Solution Overview
Problem
Existing sanitary fittings lack a reliable method to indicate when the service life of liquid filters has expired, leading to uncertain filter replacement times.
Innovation Solution
A sanitary fitting with a cap that can be adjusted into filter-in and filter-out positions, equipped with a sensor to detect the cap's position, and a filter status monitoring device to activate or deactivate based on the cap's position, providing a reliable indication of the filter's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid filter is installed in the sanitary fitting, then water quality is improved and contaminants are removed, but the user cannot reliably determine when the filter service life has expired
Solution Approach 1:
The patent implements a feedback mechanism where the sensor continuously monitors the cap position and provides information to the control unit. The control unit processes this information and activates the indicator to communicate filter status back to the user, creating a closed-loop feedback system that solves the information loss problem
Solution Approach 2:
The patent introduces an intermediary indicator device that mediates between the filter system and the user. The indicator acts as a communication intermediary, translating the sensor data about cap position into visible signals that inform users about filter service life status without requiring direct user inspection
2Loss of information
If a sensor and filter status monitoring device are added to detect cap position, then filter service life indication is improved, but device complexity increases
Solution Approach 1:
The patent extracts the monitoring function from the main filter assembly by using a separate, dedicated sensor component that independently detects cap position. This modular extraction allows the monitoring system to be added without fundamentally redesigning the filter structure, thereby limiting the increase in overall device complexity
Solution Approach 2:
The cap serves multiple functions: it seals the filter opening and simultaneously acts as a detectable element for the sensor to monitor filter status. This multi-functionality reduces the need for additional separate components, thereby minimizing the increase in device complexity while achieving reliable status indication
3Loss of information
If the filter status monitoring device is always active, then filter expiration is reliably indicated, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by having the monitoring device activate only when needed - specifically when the sensor detects cap movement indicating filter replacement. The system transitions between active and inactive states based on operational requirements, avoiding continuous energy consumption while maintaining reliable status indication during critical moments
Data Source
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AI summary
Sanitary fitting (1), comprising at least: - a fitting housing (2) with at least one liquid inlet (3, 4, 26) and at least one liquid outlet (5, 6); - a water guide (7) with a filter opening (8) for a liquid filter (9); - a cap (10) for closing the filter opening (8), wherein the cap (10) can be adjusted into a filter-in position (11) and a filter-out position (12); and - a sensor (13) for detecting the position (11, 12) of the cap (10). Furthermore, a method for operating a corresponding sanitary fitting (1) is proposed.