Method and apparatus for balanced fluid distribution in multi-compressor systems
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Solution Overview
Problem
Multi-compressor HVAC systems face issues with disproportionate fluid distribution, leading to inadequate lubrication and reduced performance and lifespan due to mechanical devices used for fluid flow regulation, which are prone to wear and maintenance costs.
Innovation Solution
A plumbing assembly with a suction equalizing tube and a distribution section that creates a pressure differential between compressors to maintain a desired fluid level, ensuring balanced fluid flow through defined flow paths and outlets, and a method to determine and achieve the necessary pressure drops for each compressor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical devices such as flow restrictors are used to regulate fluid flow to each compressor, then fluid distribution can be controlled, but the devices are subject to wear and increased maintenance expense
Solution Approach 1:
The patent removes mechanical flow restrictors from the system entirely and replaces them with a suction equalizing tube that passively balances fluid distribution through pressure differential created by liquid level differences, eliminating wear and maintenance issues associated with mechanical devices
Solution Approach 2:
The suction equalizing tube acts as an intermediary element that connects compressors at different liquid levels, allowing pressure equalization through the tube while maintaining the liquid level differential that drives the pressure balance, thereby achieving fluid distribution control without mechanical moving parts
2Ease of operation
If mechanical devices are used for fluid flow regulation, then fluid distribution can be managed, but the devices experience wear and require maintenance
Solution Approach 1:
The system uses the natural pressure differential created by liquid level differences between compressors to automatically regulate fluid flow through the suction equalizing tube, eliminating the need for external mechanical control devices and their associated wear and maintenance requirements
3Productivity
If disproportionate fluid distribution occurs in multi-compressor systems, then system operation continues, but lubrication becomes inadequate and performance is lost
Solution Approach 1:
The suction equalizing tube creates a feedback mechanism where pressure differential resulting from liquid level differences automatically regulates fluid distribution, ensuring each compressor receives appropriate lubrication based on its operating conditions without external control
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 solution maintains balanced fluid levels and pressure differentials across compressors, enhancing lubrication, performance, and extending the lifespan of compressors by reducing fluid maldistribution and maintenance needs.
Implementation Method 1
A suction equalizing tube fluidly couples the at least two compressors
Implementation Method 2
A pressure differential between the at least two compressors is created so as to facilitate maintenance of a desired fluid level in the at least two compressors
Data Source
AI summary
A compressor system includes at least two compressors. A suction equalizing tube fluidly couples the at least two compressors. A plumbing assembly fluidly couples to the first compressor and the second compressor. The plumbing assembly comprises an outlet to each compressor of the at least two compressors. A pressure differential between the at least two compressors is created so as to facilitate maintenance of a desired fluid level in the at least two compressors.