Refrigerant liquid-gas separator
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Solution Overview
Problem
Vehicle electronics systems face overheating issues due to high temperatures, leading to malfunction or failure, and air conditioning systems struggle with refrigerant backflow and liquid refrigerant accumulation, which can damage components.
Innovation Solution
A refrigerant liquid-gas separator system with an integrated check valve and electronics cooling mechanism, where heat from electronics is transferred to refrigerant, converting liquid refrigerant to vapor and preventing backflow by utilizing a check valve to inhibit liquid refrigerant release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid-gas separator device is used to prevent liquid refrigerant from entering the compressor, then compressor damage is prevented, but liquid refrigerant may accumulate in the separator over time
Solution Approach 1:
The check valve provides dynamic control of refrigerant flow direction based on pressure differential. When compressor pressure exceeds separator pressure, the valve automatically closes to prevent backflow, while allowing forward flow during normal operation. This dynamic mechanism resolves the contradiction by enabling the separator to protect the compressor while preventing liquid accumulation through controlled flow reversal prevention.
Solution Approach 2:
The check valve is extracted as a separate functional component integrated into the separator device. This extraction allows the separator to perform its primary function of liquid-gas separation while the check valve independently manages the backflow prevention, addressing both the protection need and the accumulation issue through dedicated functional elements.
2Reliability
If a check valve is integrated into the liquid-gas separator to prevent refrigerant backflow, then component damage from backflow is prevented, but device complexity increases
Solution Approach 1:
The check valve is merged with the liquid-gas separator housing to form an integrated assembly. The valve body is formed as part of the separator structure, and the valve components are positioned within the existing separator cavity. This merging reduces the number of separate parts and simplifies installation while maintaining the backflow prevention function, thus resolving the contradiction between reliability improvement and complexity increase.
Solution Approach 2:
The integrated check valve serves multiple functions: preventing refrigerant backflow to the separator, protecting the compressor from liquid ingress, and maintaining system pressure differential. This multi-functionality justifies the added structural elements by providing several protective functions through a single integrated component, effectively managing the complexity-reliability trade-off.
3Adaptability or versatility
If electronics are placed near the compressor in the engine compartment, then system integration is improved, but electronics overheating occurs
Solution Approach 1:
The liquid-gas separator with integrated check valve serves as a thermal intermediary between the hot compressor environment and the electronics. By positioning the separator (which operates at lower temperatures) between the compressor and the electronics, it acts as a thermal buffer that protects the electronics from excessive heat while maintaining system integration in the engine compartment.
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 cools electronics, improves evaporation rates in air-conditioning systems, and prevents refrigerant backflow, enhancing system efficiency and reducing the risk of component damage.
Implementation Method 1
heat from the electronics is transferred to the refrigerant
Implementation Method 2
converting liquid refrigerant to vapor
Implementation Method 3
a check valve configured to prevent backflow by inhibiting flow of refrigerant into the liquid-gas separator device via the refrigerant outlet
Data Source
AI summary
An HVAC system includes a refrigerant liquid-gas separator. The liquid-gas separator is thermally coupled to electronics to transfer heat away from the electronics, and assist in vaporizing liquid refrigerant. The liquid-gas separator device includes a refrigeration section configured to couple to a refrigeration loop, and electronics thermally coupled to the refrigeration section. The refrigeration section includes: (a) a refrigerant inlet configured to receive refrigerant from the refrigeration loop; (b) a refrigerant outlet configured to release vapor refrigerant to the refrigeration loop; and (c) a cavity coupled to the refrigerant inlet and the refrigerant outlet, the cavity configured to separate liquid refrigerant from vapor refrigerant. During use of the HVAC system, heat from the electronics board is transferred to the refrigerant. The liquid-gas separator includes a check valve configured to inhibit flow of refrigerant into the liquid-gas separator device via the refrigerant outlet.