Scroll Compressor Injection Hole for Refrigerant Discharge
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Solution Overview
Problem
Conventional scroll compressors have limitations in improving the performance and efficiency of refrigerant discharge from the compression chamber, restricting the amount of refrigerant that can be effectively compressed and discharged.
Innovation Solution
The scroll compressor design includes a housing, motor, rotating shaft, orbital scroll, and a fixed scroll with an injection hole that guides intermediate pressure refrigerant into a pair of compression chambers, enhancing the discharge of refrigerant through a main and sub discharge system, which includes specific discharge holes and valves to manage pressure and flow efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional scroll compressor design is used, then the structure is simple, but the amount of refrigerant discharged from the compression chamber is limited
Solution Approach 1:
The compression chamber is divided into multiple sections with multiple injection holes positioned at different locations and orientations. This segmentation allows intermediate pressure refrigerant to be injected into different regions of the compression chamber simultaneously, increasing the total amount of refrigerant that can be compressed and discharged without requiring a complete redesign of the compressor structure.
Solution Approach 2:
The injection hole serves multiple functions: it guides intermediate pressure refrigerant into the compression chamber, controls the timing of refrigerant injection through the orbital movement of the scroll, and distributes refrigerant to different compression chamber regions. This multi-functionality increases refrigerant discharge amount without adding separate components for each function.
2Productivity
If the compression ratio is increased to improve performance, then the discharge amount increases, but the risk of overcompression and pressure imbalances increases
Solution Approach 1:
Intermediate pressure refrigerant is injected into the compression chamber before the compression stroke is complete. This preliminary action ensures that the compression chamber is properly filled with refrigerant at the optimal timing, allowing for efficient compression without overcompression. The injection timing is controlled by the orbital movement of the scroll relative to the fixed scroll, ensuring precise delivery of refrigerant at the right moment in the compression cycle.
Solution Approach 2:
Different injection holes are positioned at different locations within the compression chamber to create localized refrigerant distribution. This ensures that refrigerant is injected into specific regions where it is needed most, maintaining pressure balance across the compression chamber while achieving high compression ratios. The orbital scroll's movement dynamically opens and closes different injection holes at different times, optimizing local refrigerant distribution throughout the compression cycle.
Data Source
AI summary
A scroll compressor includes a housing; a motor provided in the housing; a rotating shaft rotated by the motor; an orbital scroll orbital moved by the rotating shaft; and a fixed scroll forming a compression chamber together with the orbital scroll, wherein the fixed scroll includes an injection hole guiding an intermediate pressure refrigerant to the compression chamber, wherein the compression chamber is formed in a pair, and wherein the injection hole is formed to communicate with any one of the pair of compression chambers when communicating with the other one of the pair of compression chambers. Thereby, an amount of refrigerant discharged from the compression chamber is increased, and thus the performance and efficiency of the compressor may be improved.