Liquid Density Determination Device for Dialysis Concentrate
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Solution Overview
Problem
Existing liquid treatment systems for producing dialysis concentrate face challenges in accurately determining liquid density due to indirect and uncertain measurements using expensive and sensitive flow and density sensors.
Innovation Solution
A liquid density determination device featuring a vertically movable measuring vessel with a known filling volume, a filling sensor, temperature sensor, and electronic scale, which directly measures liquid density from mass and temperature, reducing component costs and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If flow sensors and density sensors are used to determine liquid quantity and density, then measurement capability is provided, but measurement precision deteriorates due to indirect measurement uncertainty and high component cost
Solution Approach 1:
The patent replaces complex electronic sensing systems (flow sensors and density sensors) with a simple mechanical balance system. The balance directly measures the mass of liquid in the measuring vessel, and combined with the known volume, calculates density through basic physics (density = mass/volume). This mechanical approach eliminates indirect measurement uncertainties and reduces component complexity while improving measurement precision.
2Reliability
If indirect measurement methods using sensors are employed, then liquid parameters can be determined, but reliability worsens due to measurement uncertainty
Solution Approach 1:
The patent replaces unreliable indirect electronic sensing with direct mechanical mass measurement using a balance. The balance provides a straightforward, reliable measurement of liquid mass that, when combined with known volume, yields accurate density calculations. This direct measurement approach eliminates the measurement uncertainties inherent in indirect sensor-based methods.
3Measurement precision
If expensive high-precision sensors are used, then measurement capability is improved, but cost increases
Solution Approach 1:
The patent replaces expensive, sensitive electronic sensors with a simple, inexpensive mechanical balance system. The balance is a robust, low-cost device that can be easily manufactured and maintained. This substitution dramatically reduces system cost while maintaining or improving measurement precision through direct physical measurement rather than expensive electronic sensing.
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
This solution achieves high measurement accuracy and reliability with lower component costs, enabling precise concentration determination of dialysis liquid concentrates and their substances.
Implementation Method 1
an electronic scale, which carries the liquid measuring vessel and which determines the liquid mass in the measuring vessel
Implementation Method 2
the measuring vessel is assigned a temperature sensor which detects the liquid temperature of the liquid in the measuring vessel
Data Source
Figure 1
AI summary
The invention relates to a liquid treatment system (10) for density-changing treatment of a liquid (13). The system 10 comprises a liquid density determination device (11) with the following features: a vertically movable liquid measuring vessel (14) with a known filling volume (F) and a liquid inlet (29), a non-rigid filling line (35) opening into the liquid inlet (29), a filling sensor (32) that detects the complete filling of the measuring vessel (14) with the liquid (13'), a temperature sensor (34) that detects the liquid temperature (t) of the liquid (13') in the measuring vessel (14), an electronic scale (16) that supports the liquid measuring vessel (14) and determines the liquid mass (m), and a system control unit (20) with a density detector (20') that calculates the physical density (D) of the liquid (13') from the known filling volume (F) and the measured liquid temperature (t).and the measured liquid mass (m) is determined when the fill sensor (32) detects that the measuring vessel (14) is completely filled with the liquid (13'). This allows the physical density of the liquid to be determined in a simple way.