Temperature-Controlled Metering Line for Accurate Process Liquid Delivery
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Solution Overview
Problem
In medical specimen testing, inaccurate metering and temperature fluctuations of process liquids, such as purified water, lead to inaccuracies in testing results due to temperature drift and volumetric changes in the metering line, requiring frequent recalibrations that divert time from diagnostic testing.
Innovation Solution
A temperature-controlled process liquid delivery system that includes a feed tank, a metering apparatus, a pre-flux member to control the temperature of the process liquid before the metering apparatus, and a line flux member directly thermally coupled to the metering line to maintain precise temperature control at the exit, ensuring consistent temperature and volume accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature control is not implemented in the process liquid delivery system, then the system complexity is reduced, but temperature drift and volumetric changes cause inaccurate metering and testing results
Solution Approach 1:
The pre-flux member is positioned between the feed tank and the metering apparatus to control the temperature of the process liquid before it enters the metering apparatus. This preliminary temperature control prevents temperature drift and volumetric changes during metering, ensuring accurate measurement without requiring complex real-time compensation systems throughout the entire delivery path.
Solution Approach 2:
The pre-flux member and line flux member act as thermal intermediaries that mediate between the ambient environment and the process liquid. These components provide thermal isolation and active temperature control, preventing environmental temperature fluctuations from affecting the metering accuracy while maintaining a relatively simple overall system architecture.
2Measurement precision
If frequent recalibrations are performed to maintain accuracy, then measurement precision is maintained, but productivity decreases due to time diversion from diagnostic testing
Solution Approach 1:
By implementing temperature control through the pre-flux member before the metering apparatus, the system establishes stable temperature conditions that prevent drift during operation. This preliminary stabilization eliminates the need for frequent recalibrations, allowing continuous diagnostic testing without time-consuming accuracy checks.
Solution Approach 2:
The line flux member is directly thermally coupled to the metering line and operable to control the temperature of the process liquid contained in the metering line. This feedback-based temperature control continuously monitors and adjusts the liquid temperature, maintaining measurement precision without requiring manual recalibration interruptions.
3Ease of operation
If environmental temperature fluctuations are not controlled, then the system is simpler to operate, but volumetric changes in the metering line lead to inaccurate dispensing
Solution Approach 1:
The pre-flux member and line flux member serve as thermal intermediaries that isolate the process liquid from environmental temperature fluctuations. These components actively maintain the liquid temperature despite ambient changes, ensuring accurate dispensing volumes without requiring complex environmental controls or manual adjustments.
Solution Approach 2:
The system actively controls the temperature parameter of the process liquid through the pre-flux member and line flux member. By maintaining a constant temperature parameter, the system prevents volumetric changes that would otherwise occur due to thermal expansion and contraction, ensuring consistent dispensing accuracy while maintaining ease of operation.
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 effectively controls the temperature of the process liquid, minimizing environmental drift and volumetric changes, thereby enhancing testing accuracy and reducing the need for frequent recalibrations, allowing for more efficient diagnostic testing.
Implementation Method 1
a pre-flux member positioned between the feed tank and the metering apparatus and adapted to control a temperature of the process liquid received at the metering apparatus
Implementation Method 2
a line flux member directly thermally coupled to the metering line and adapted to control a temperature of the process liquid contained in the metering line
Data Source
AI summary
Disclosed are systems and apparatus adapted to control a temperature of a process liquid in a metering line of an instrument. In one aspect, a temperature-controlled liquid delivery apparatus has a pre-flux member operable to control a first temperature set point SP1 of the process liquid in a flow path between a feed tank and a metering apparatus, a metering line connecting the metering apparatus and a probe, and a line flux member directly thermally coupled to the metering line and operable to control a second temperature set point SP2 of the process liquid contained in the metering line. Methods of operating the system are provided, as are other aspects.