Compressor with fluid cavity for cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current compressor cooling systems in climate-control systems face inefficiencies due to inadequate lubricant management and heat transfer, leading to suboptimal performance and reliability in providing cooling and heating effects.
Innovation Solution
The system incorporates a compressor with a compression mechanism featuring first and second compression members defining a compression pocket, a heat exchanger, an expansion device, and a lubricant separator, along with a lubricant-injection flow path and recirculation flow path, which includes a pump powered by pressure differential and a rotary vane pump, to enhance lubricant injection and heat transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional compressor cooling system is used, then the structure is simple, but the lubricant management and heat transfer efficiency are inadequate
Solution Approach 1:
The patent combines multiple functions into integrated components: the lubricant separator integrates lubricant separation and injection functions, the heat exchanger integrates cooling of compression members and lubricant cooling, and the recirculation system integrates pump and flow control functions. This merging approach improves reliability through better lubricant management and heat transfer while avoiding excessive complexity by consolidating functions rather than adding separate independent systems.
Solution Approach 2:
The working fluid serves multiple functions simultaneously: it acts as the refrigerant for climate control, the cooling medium for compression members, and the cooling medium for lubricant. The recirculation system provides both lubricant separation and injection functions. This multi-functionality improves system reliability without proportionally increasing complexity, as existing components perform multiple roles.
2Productivity
If lubricant injection is not optimized, then the system is simpler, but compression mechanism performance deteriorates
Solution Approach 1:
The recirculation system creates a feedback loop where lubricant is continuously separated from the working fluid, cooled, and reinjected into the compression mechanism. The pump maintains continuous circulation based on pressure differentials, ensuring optimal lubricant delivery. This feedback mechanism improves compression efficiency through consistent lubricant supply without requiring complex external control systems.
Solution Approach 2:
The system uses the working fluid itself to cool and transport the lubricant, and uses pressure differentials to drive the recirculation pump without external power sources. The lubricant separator automatically separates lubricant from working fluid based on density differences. These self-service mechanisms improve compression mechanism efficiency while avoiding additional complexity from external cooling systems or powered pumps.
3Reliability
If heat transfer efficiency is insufficient, then the system structure is simpler, but compressor performance and reliability worsen
Solution Approach 1:
The heat exchanger is designed to simultaneously cool the compression members and the lubricant in an integrated heat exchange process. The working fluid flows through passages that enable heat transfer to both the compression members and the lubricant, combining multiple cooling functions into a single heat exchange unit. This improves compressor reliability through effective heat removal while avoiding the complexity of separate cooling systems for each component.
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 configuration improves the efficiency of the compressor by ensuring effective lubricant injection and heat transfer, leading to enhanced performance and reliability in climate-control systems by optimizing the compression mechanism and heat exchange processes.
Implementation Method 1
A heat exchanger receives compressed working fluid from the compressor
Implementation Method 2
A lubricant separator receives lubricant and working fluid discharged from the compression mechanism and provides separated lubricant to the compression mechanism
Implementation Method 3
a pump powered by pressure differential
Implementation Method 4
a compression mechanism having first and second compression members defining a compression pocket disposed between the first and second compression members that decreases in volume during operation of the compression mechanism
Data Source
AI summary
A system may include a compressor including a compression mechanism having first and second compression members defining a compression pocket disposed between the first and second compression members that decreases in volume during operation of the compression mechanism. A heat exchanger receives compressed working fluid from the compressor. An expansion device may be disposed downstream of the heat exchanger. A lubricant separator receives lubricant and working fluid discharged from the compression mechanism and provides separated lubricant to the compression mechanism. A lubricant-injection flow path may include a lubricant fitting and extends between the lubricant separator and the compression pocket such that separated lubricant is injected into the compression pocket through the lubricant fitting.