Scroll Compressor Communication Groove Discharge Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The scroll compressor experiences increased vibration and noise due to the inclination of the orbiting scroll caused by mismatched application points of the refrigerant's repulsive force and reaction force, and there is a discharge delay and over-compression loss due to the difference in opening times of the discharge holes for the first and second compression chambers.
Innovation Solution
The compressor design includes a communication groove in the orbiting end plate to facilitate the discharge of refrigerant from the second compression chamber through the first discharge hole, and the shapes of the fixed and orbiting wraps are modified to optimize compression rates by altering the curvature and thickness distribution, ensuring the refrigerant can be discharged efficiently through the first discharge hole even when the second discharge hole's open area is small.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the orbiting wrap is formed over an approximate entire area of the end plate, then the size of the end plate may be smaller, but the repulsive force and reaction force act as two forces and incline the orbiting scroll causing vibration or noise
Solution Approach 1:
The patent positions the eccentric portion at the same axial level as the orbiting wrap to create a counterbalancing effect. This arrangement ensures that the repulsive force from the refrigerant and the reaction force from the eccentric portion act along the same line, preventing tilting of the orbiting scroll and reducing vibration and noise.
2Device complexity
If one discharge hole is provided for both compression chambers, then the device complexity is reduced, but discharge delay and over-compression loss occur due to different opening times
Solution Approach 1:
The patent divides the discharge system into separate discharge holes for the first and second compression chambers. This segmentation allows each compression chamber to have its own discharge timing controlled by the wrap shape, preventing discharge delay and over-compression loss while maintaining efficient refrigerant discharge.
3Productivity
If the discharge holes are individually formed, then discharge timing can be optimized, but it is difficult to secure an open area of the discharge hole at the initial stage of discharge
Solution Approach 1:
The patent designs the wrap shapes with different curvature radii at the discharge sides of the first and second compression chambers. This creates local quality differences that control the timing of discharge hole opening, ensuring that the discharge holes open at appropriate moments during the compression cycle to maximize discharge efficiency.
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 design reduces discharge resistance and delay, enhances compression rates, and improves the overall performance by ensuring efficient discharge of refrigerant from both compression chambers, thereby reducing noise and vibration.
Implementation Method 1
a communication groove formed in an inner surface of the orbiting end plate, the communication groove allowing the refrigerant compressed in the second compression chamber to move to the first discharge hole
Implementation Method 2
a first compression chamber formed at an outer side surface of the orbiting wrap, and a second compression chamber formed on an inner side surface of the orbiting wrap
Data Source
AI summary
A scroll compressor, and more particularly, to a scroll compressor including a communication groove which may decrease discharge resistance is provided. The scroll compressor may include a fixed scroll having a fixed end plate and a fixed wrap, and an orbiting scroll configured to perform an orbiting movement about the fixed scroll and having an orbiting end plate and an orbiting wrap. A communication groove in the form of a recessed groove may be formed in an inner surface of the orbiting end plate, and a refrigerant may flow through the communication groove according to a state in which the fixed wrap overlaps the communication groove such that there is an effect in that an opening efficiency of a discharge hole is improved at an initial stage of discharge.