Refrigerant Identification Device Using Colorimetric Reagent
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Solution Overview
Problem
Current methods for identifying refrigerant gases like R-134a and R-1234yf in automotive air conditioning systems are inefficient due to their similar chemical and physical properties, requiring complex and costly detection techniques.
Innovation Solution
A device with a reagent that reacts chemically with ethylene functions to differentiate between the two gases, using a color change as an indicator, allowing for simple visual identification of the presence of an ethylene function in the refrigerant fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detection methods based on molecular weight, specific heat, or dielectric properties are used, then refrigerant gas identification can be performed, but the device complexity and cost increase significantly
Solution Approach 1:
The patent replaces complex physical property-based detection systems with a simple chemical reaction-based detection system. Instead of using sophisticated instruments to measure molecular weight, specific heat, or dielectric properties, the invention uses a reagent that undergoes a visible chemical reaction (color change) when it contacts the refrigerant gas, thereby substituting a complex mechanical/electrical measurement system with a simple chemical indicator system.
Solution Approach 2:
The patent employs a reagent that changes color in response to contact with specific refrigerant gases. This color change provides a visual indicator of the refrigerant type present, allowing for simple and cost-effective identification without requiring complex measurement instruments. The colorimetric detection method transforms an invisible chemical interaction into a visible signal.
2Measurement precision
If complex and costly detection techniques are used to differentiate R-134a and R-1234yf, then accurate identification is achieved, but the ease of operation and cost-effectiveness deteriorate
Solution Approach 1:
The patent replaces complex physical property-based detection systems with a simple chemical reaction-based detection system. Instead of using sophisticated instruments to measure molecular weight, specific heat, or dielectric properties, the invention uses a reagent that undergoes a visible chemical reaction (color change) when it contacts the refrigerant gas, thereby substituting a complex mechanical/electrical measurement system with a simple chemical indicator system.
Solution Approach 2:
The detection system is designed to be self-indicating through the color change of the reagent. The reagent automatically responds to the presence of specific refrigerant gases without requiring external power sources, complex instrumentation, or sophisticated data processing. The system serves itself by providing direct visual feedback through the chemical reaction.
3Measurement precision
If precise physical property measurement is used to distinguish refrigerant gases, then identification accuracy improves, but the cost and time required for detection increase
Solution Approach 1:
The reagent is prepared in advance and placed in the detection device, ready to immediately react with the refrigerant gas upon contact. This preliminary preparation eliminates the need for complex real-time measurements and data processing during the actual detection process, thereby reducing detection time while maintaining accuracy.
Solution Approach 2:
The patent replaces complex physical property-based detection systems with a simple chemical reaction-based detection system. Instead of using sophisticated instruments to measure molecular weight, specific heat, or dielectric properties, the invention uses a reagent that undergoes a visible chemical reaction (color change) when it contacts the refrigerant gas, thereby substituting a complex mechanical/electrical measurement system with a simple chemical indicator system.
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
Enables effective and cost-efficient discrimination between R-134a and R-1234yf through a chemical reaction with a reagent that changes color, facilitating accurate identification of the refrigerant composition in automotive air conditioning systems.
Implementation Method 1
means for detecting presence of the at least one composition in the refrigerant fluid in the receiving volume. The detection means comprise a reagent placed in the reception volume and configured to react by a chemical reaction with at least one ethylene function, so as to identify a composition comprising an ethylene function
Implementation Method 2
the reagent being configured so that the product of the reaction chemical has a different color than the reagent
Data Source
Figure 1a~3
Figure 4~5
Figure 6~7
AI summary
The present invention relates to a device for identifying at least one coolant fluid composition, comprising a space (1) for receiving a coolant fluid, provided with an inlet (5) that can be connected to an air-conditioning circuit, and means for detecting the presence of the at least one composition in the coolant fluid in the receiving space (1), characterized in that the detection means comprise a reagent placed in the receiving space (1) and configured to react, by a chemical reaction, with at least one ethylene function, so as to identify a composition comprising an ethylene function, the reagent being configured such that the product of the chemical reaction has a different colour to that of the reagent.