Coolant Charging Through Hoses With Density Compensation
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Solution Overview
Problem
Existing methods for charging a coolant into a cooling system via a hose suffer from inaccuracy due to variations in hose length, internal diameter, supply pressure, and temperature differences, leading to incorrect dosage and inefficiencies in charging gaseous coolants.
Innovation Solution
Implementing temperature and pressure sensors at both ends of the hose, connected to a computer with software that calculates and compensates for density changes, ensuring precise control of the coolant flow through a flow valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If charging is performed via a hose of significant length, then the charging process can be performed remotely or with flexible positioning, but the density variations along the hose cause inaccuracy in the measured and calculated coolant amount
Solution Approach 1:
The patent implements feedback by continuously measuring both temperature and pressure at the inlet and outlet of the hose, then using these measurements to calculate density variations and compensate for the amount of coolant that passes through the valve but is not directly measured by the meter. This closed-loop feedback system corrects for the hose-induced measurement errors in real-time.
Solution Approach 2:
The patent applies parameter changes by measuring multiple physical parameters (temperature and pressure at two locations) rather than relying on a single parameter, and by using these varying parameters to calculate density changes along the hose. This allows the system to account for the changing conditions within the hose and achieve accurate measurement despite the hose's presence.
2Extent of automation
If a meter is used to measure coolant flow, then the charging process can be monitored and controlled, but the measurements become inaccurate due to pressure drop and density changes through the hose
Solution Approach 1:
The system uses feedback by continuously monitoring temperature and pressure at both inlet and outlet, then using these feedback signals to calculate the actual amount of coolant charged by compensating for density variations. This feedback mechanism corrects the measurements in real-time, maintaining accuracy while preserving automated control.
Solution Approach 2:
The patent replaces reliance on purely mechanical flow measurement with a combination of sensor-based measurements (temperature and pressure sensors) and computational calculation. This substitution of mechanical measurement with sensor-based measurement and software calculation allows for compensation of physical effects that would otherwise degrade measurement accuracy.
3Device complexity
If temperature and pressure variations are not compensated for, then the charging system remains simple, but the charged amount of coolant becomes incorrect due to density changes
Solution Approach 1:
The patent applies parameter changes by measuring multiple physical parameters (temperature and pressure at two locations) and using these parameters to calculate density variations. By incorporating these parameter measurements and calculations, the system achieves accurate charging despite the added complexity of monitoring and computing density changes.
Solution Approach 2:
The patent replaces simple mechanical charging with a system that uses sensor-based measurements and software calculation to determine the actual amount of coolant charged. This substitution allows for compensation of thermal and pressure effects through computational methods rather than complex mechanical adjustments.
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 method ensures accurate charging of the desired coolant amount, regardless of physical state, by accounting for temperature and pressure variations, enhancing the precision and economy of coolant maintenance and operation.
Implementation Method 1
the temperature of the coolant as well as its pressure is recorded currently at its admission to the hose and at its discharge from the hose
Implementation Method 2
the temperature of the coolant as well as its pressure is recorded currently at its admission to the hose and at its discharge from the hose
Implementation Method 3
a connected computer with suitable software is able to compensate and control the charging via a flow valve
Data Source
Figure 1~2
AI summary
To ensure precise charging of a coolant into a cooling system (6) via a hose (4), temperature sensors (Ts and Te) and pressure sensors (Ps and Pe) are mounted at the inlet side and/or outlet side of the hose (4). A signal may be applied from these sensors to a computer (11), which is capable of calculating the amount pumped through the hose (4) and thereby controlling it via a valve (5). It is ensured in this manner that the charged amount is determined on the basis of its density and not, as was previously the case, solely on the basis of a weight control.