Scroll Compressor Intermediate Pressure Chamber Supply Passage Spacing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In scroll compressors, increasing the diameter of injection ports to enhance refrigerant flow rate during high load operations can lead to reduced compression efficiency due to refrigerant backflow into the intermediate pressure chamber, creating a dead volume that decreases compression efficiency.
Innovation Solution
The design incorporates supply passages and injection ports where the distance between the openings of the supply passages is less than the distance between the injection ports closest to the compression chambers, minimizing the volume between the check valve and supply passages, thereby reducing refrigerant backflow and maintaining compression efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the diameter of the injection ports is increased to increase the flow rate of refrigerant introduced into the compression chambers, then the refrigerant flow rate is improved, but the compression efficiency deteriorates due to refrigerant backflow into the intermediate pressure chamber
Solution Approach 1:
The patent positions the supply passages and injection ports at different distances from the intermediate pressure chamber, creating a spatial dimension difference. The supply passages are located closer to the intermediate pressure chamber than the injection ports, forming a spatial arrangement that prevents backflow while maintaining forward flow efficiency.
Solution Approach 2:
The supply passages act as an intermediary structure between the intermediate pressure chamber and the injection ports. This intermediary arrangement with controlled spacing allows refrigerant to flow forward efficiently while preventing reverse flow into the intermediate pressure chamber, thus resolving the contradiction between flow rate and compression efficiency.
2Productivity
If the diameter of the injection ports is increased to enhance refrigerant flow rate, then the refrigerant flow rate is improved, but a dead volume is created between the check valve and supply passages, reducing compression efficiency
Solution Approach 1:
The patent utilizes spatial positioning in multiple dimensions, placing the supply passages at a specific distance from the intermediate pressure chamber that is less than the distance of the injection ports. This dimensional arrangement minimizes the dead volume while accommodating larger injection ports for enhanced flow rate.
Solution Approach 2:
The patent changes the spatial parameters (distances) of the supply passages and injection ports relative to the intermediate pressure chamber. By optimizing these distance parameters, the system achieves both high refrigerant flow rate through larger injection ports and minimal dead volume through closer supply passage positioning.
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 effectively limits the reduction in compression efficiency by minimizing the volume for refrigerant backflow, ensuring consistent performance during high load operations.
Implementation Method 1
The check valve prevents backflow of the refrigerant from the compression chambers via the supply passages and the injection ports
Data Source
AI summary
The distance between openings of two supply passages that are closest to an accommodating recess is less than the distance between openings of two injection ports that are closest to compression chambers. This configuration minimizes the volume of the space in the accommodating recess between a check valve and the two supply passages, unlike a case in which the distance between the openings of the supply passages that are closest to the accommodating recess is greater than or equal to the distance between the openings of the two injection ports that are closest to the compression chambers. This reduces the flow rate of refrigerant that flows into the accommodating recess from the compression chambers in a compression process through the injection ports and the supply passages.