Refrigerant Compressor Lubricant Cascade System for Parallel Supply
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Refrigerant compressor installations with multiple compressors face challenges in ensuring a sufficient lubricant supply to all compressors, as existing systems often fail to maintain adequate lubricant levels across the units.
Innovation Solution
The implementation of a lubricant conduit system with a pressure cascade sequence, where each compressor's lubricant sump unit is connected to create a cascade of decreasing pressures, ensuring lubricant transport from one unit to the next, with insert elements controlling the lubricant level and flow through mouth openings above and below the predetermined level, and visualization units for monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple compressors are arranged in parallel to increase productivity, then the compressor system can handle higher refrigerant loads, but it becomes difficult to ensure sufficient lubricant supply to all compressors
Solution Approach 1:
The patent applies hydraulic principles by using pressure differential as the driving force for lubricant transport. The system creates a pressure cascade where each compressor operates at a slightly different pressure, allowing lubricant to flow automatically from higher-pressure compressors to lower-pressure compressors through connecting conduits, eliminating the need for additional pumping mechanisms.
Solution Approach 2:
The system dynamically adjusts lubricant distribution based on real-time operating conditions. Each compressor's lubricant level independently controls its own lubricant supply through level-controlled outlets, allowing the system to adapt to varying load conditions, compressor failures, or maintenance requirements without manual intervention.
2Reliability
If lubricant is transported between compressors to ensure sufficient supply, then all compressors receive adequate lubrication, but the system complexity increases due to additional conduits and control mechanisms
Solution Approach 1:
Each compressor is equipped with a level-controlled lubricant outlet that automatically regulates lubricant flow based on its own lubricant level. When the lubricant level drops, the outlet closes to prevent further loss; when the level is sufficient, the outlet opens to allow lubricant transfer. This self-regulating mechanism eliminates the need for complex external control systems.
Solution Approach 2:
The lubricant distribution system is segmented into independent control units at each compressor. Each compressor has its own level-controlled outlet and lubricant level detection point, allowing independent operation and control. This modular approach simplifies the overall system by breaking down the complex distribution task into manageable, autonomous segments.
3Reliability
If lubricant level is strictly controlled in each compressor, then sufficient lubrication is maintained, but the ability to detect and monitor lubricant levels becomes more difficult
Solution Approach 1:
The patent employs visual indicators that change appearance based on lubricant level. The level-controlled outlets and associated visualization elements provide clear visual feedback about lubricant levels, allowing operators to easily monitor system status without complex instrumentation. This may include color-coded indicators or visible lubricant levels through transparent portions of the 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
This solution ensures a consistent and sufficient lubricant supply to all compressors, minimizing turbulence and optimizing lubricant distribution, while allowing for real-time monitoring and maintenance through visual indicators.
Implementation Method 1
the respective pressures in the respective lubricant sump units of the respective compressors form a pressure cascade according to which the compressors have a successively slightly decreasing pressure in the respective lubricant sump unit in a defined cascade sequence
Implementation Method 2
for each insert element to have a mouth opening of a lubricant channel leading to the lubricant conduit system, which mouth opening is located above the respective predetermined lubricant level in a direction of gravity so that when the amount of lubricant in the respective lubricant sump unit exceeds the predetermined lubricant level, the lubricant can enter the lubricant conduit system via said mouth opening
Implementation Method 3
for the insert elements of the compressors which are in each case located between two compressors in the cascade sequence to have a mouth opening of a lubricant channel leading to the lubricant conduit system, which mouth opening is located below the predetermined lubricant level in a direction of gravity, wherein said lubricant channel and said mouth opening afford the possibility of supplying lubricant to the corresponding lubricant sump unit
Data Source
AI summary
Refrigerant compressor installation comprising at least three compressors which are arranged in parallel between an intake conduit and a pressure conduit and which each comprise a lubricant sump unit, wherein the compressors, when in operation, work in such a way that the respective pressures in the respective lubricant sump units of the respective compressors form a pressure cascade according to which the compressors have a successively slightly decreasing pressure in the respective lubricant sump unit in a defined cascade sequence, and wherein the lubricant sump units are connected to each other in a manner corresponding to the cascade sequence by way of a lubricant conduit system for lubricant transport, and wherein each lubricant sump unit comprises a port to which is connected an insert element which on the one hand establishes communication with the lubricant conduit system and on the other hand is configured such that it predetermines, for the respective lubricant sump unit, a lubricant level from which lubricant is transported to the lubricant sump unit that follows next in the cascade sequence.