Filter Head with Flow Meter and Conductivity Sensor for Water Softening
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Solution Overview
Problem
Existing water treatment filter systems face challenges in maintaining consistent water hardness and extending the service life of filter candles, as the ion exchange material becomes exhausted, leading to a decrease in softening effect and requiring frequent replacements based on time rather than actual water usage.
Innovation Solution
A filter head system with integrated flow meter, conductivity measuring device, and computing unit that adjusts the blend ratio of bypass and treated water, allowing for automatic readjustment based on water hardness and usage, extending the filter candle's service life by optimizing ion exchange material capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter candle is replaced based on time elapsed, then the replacement schedule is simple, but it does not take into account the actual amount of water treated and the ion exchange material exhaustion
Solution Approach 1:
The system incorporates a flow meter that continuously measures and records the amount of water treated by the filter candle. This feedback mechanism allows the system to track actual water usage and ion exchange material exhaustion, enabling replacements to be scheduled based on actual performance rather than arbitrary time intervals. The controller processes this data to determine when the filter candle should be replaced, optimizing both operational simplicity and measurement accuracy.
2Duration of action of stationary object
If the bypass is adjusted to compensate for decreasing softening effect, then the service life of the filter candle can be extended, but it requires continuous verification of water hardness and manual adjustment
Solution Approach 1:
The system automatically monitors water hardness using a conductivity measuring device and adjusts the bypass valve accordingly without requiring manual intervention. The controller continuously verifies the softening effect and modulates the bypass to maintain optimal performance, allowing the filter candle to operate at full capacity for its complete service life. This self-regulating mechanism eliminates the need for users to manually adjust the bypass while extending the effective service life of the filter candle.
3Reliability
If the ion exchange material is heavily loaded with exchange ions, then the softening effect decreases, but replacing the filter candle frequently based on time is inefficient
Solution Approach 1:
The flow meter provides continuous feedback on the amount of water treated, allowing the system to track ion exchange material exhaustion in real-time. This enables replacements to be scheduled precisely when the material is exhausted, maintaining consistent softening effect reliability while avoiding premature replacements and optimizing productivity.
Solution Approach 2:
The system replaces manual time-based replacement scheduling with an automated electronic control system that uses flow meter and conductivity device data. This substitution of mechanical/time-based methods with electronic sensing and control maintains reliable softening effect while optimizing replacement frequency based on actual material exhaustion rather than arbitrary time intervals.
4Reliability
If the dwell time of water inside the filter candle is increased, then the softening effect improves, but it may result in undesirably high degree of softening especially with small or repeated water removal
Solution Approach 1:
The system dynamically adjusts the bypass valve position based on real-time feedback from the flow meter and conductivity measuring device. This dynamic control allows the system to optimize the dwell time of water in the filter candle for maximum softening effect while preventing excessive softening by diverting appropriate portions of water through the bypass. The continuous adjustment ensures reliable softening effect across varying water usage conditions without requiring manual intervention.
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 system ensures consistent water hardness and extends the service life of the filter candle by automatically adjusting the blend ratio and monitoring water usage, reducing the need for frequent replacements and maintaining effective softening over time.
Implementation Method 1
a flow meter, for example, which is installed in the pipe
Implementation Method 2
a connected device that includes a flow meter, such as a machine for preparing hot beverages
Implementation Method 3
an ion exchange material, which may in particular come in the form of a weakly acidic ion exchange resin, is used to replace hardness imparting components such as calcium by other ions such as hydrogen
Implementation Method 4
an adjustable bypass that is integrated in the filter head and/or in the filter candle and through which part of the flow can be diverted so as to not pass through the water treatment medium, and which is then mixed with the water that was passed through the water treatment medium
Data Source
AI summary
The disclosure relates to a filter head comprising a housing having one inlet and at least one outlet for being connected to an on-site water pipe. A filter candle having a filter candle inlet and at least one filter candle outlet can be installed in the filter head, and the filter head has means for setting a desired degree of softening by setting a blend ratio. The filter head comprises a flow meter and at least one conductivity measuring device, in particular a conductivity measuring cell, and the filter head has an interface for data transmission to an external unit and an integrated computing unit.