Rotary compressor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In rotary compressors, the hinge vane type experiences increased side pressure and friction loss due to refrigerant residual spaces, leading to reduced efficiency and reliability, as refrigerant pressure rises above discharge pressure, causing further side wear and reliability issues.
Innovation Solution
A rotary compressor design with a discharge port that communicates with the refrigerant residual space, allowing for the discharge of refrigerant through a discharge port that overlaps with the vane slot or hinge groove, featuring varying diameters and orientations to ensure continuous communication and efficient refrigerant removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hinge vane type rotary compressor is used, then the vane behavior is stable and axial leakage is reduced, but side pressure increases causing friction loss and side wear between the vane and vane slot
Solution Approach 1:
The invention divides the compression chamber into multiple segments by introducing partition walls. These partition walls create separate compression spaces that allow the vane to move more freely, reducing the side pressure transmitted to the vane slot while maintaining stable vane behavior. The segmentation enables independent pressure management in different zones.
Solution Approach 2:
The invention introduces partition walls that extend in the axial direction, creating a three-dimensional segmentation of the compression space. This dimensional approach allows pressure distribution to be controlled not just radially but also axially, reducing the couple forces acting on the vane while maintaining compression efficiency.
2Reliability
If a hinge vane type rotary compressor is used, then the vane behavior is stable and axial leakage is reduced, but side wear increases between the vane and vane slot
Solution Approach 1:
The partition walls divide the compression chamber into multiple smaller compression spaces, reducing the side pressure transmitted to the vane slot. This segmentation decreases the mechanical stress and wear on the vane slot while preserving the stable vane behavior characteristic of hinge vane types.
Solution Approach 2:
The partition walls act as intermediaries that intercept and redirect the gas forces, preventing them from being fully transmitted to the vane slot. This mediation reduces the side wear on the vane slot while maintaining the necessary vane stability during compression.
3Productivity
If refrigerant remains in the refrigerant residual space, then the compression process is complete, but refrigerant pressure rises above discharge pressure causing increased side pressure and friction loss
Solution Approach 1:
The invention extracts the refrigerant from the refrigerant residual space by providing discharge passages that allow the trapped refrigerant to be discharged to the discharge port. This extraction prevents pressure buildup in the residual space that would otherwise cause increased side pressure and friction loss during the compression stroke.
Solution Approach 2:
The discharge passages are positioned and sized to enable preliminary discharge of refrigerant from the residual space before the compression stroke completes. This preliminary action prevents the pressure from rising above discharge pressure, avoiding the subsequent increase in side pressure and friction loss.
4Productivity
If refrigerant remains in the refrigerant residual space, then the compression process is complete, but compressor reliability deteriorates due to increased side pressure
Solution Approach 1:
The discharge passages extract refrigerant from the refrigerant residual space, preventing pressure buildup that would compromise compressor reliability. This extraction mechanism ensures that residual refrigerant does not cause increased side pressure that could damage compressor components.
Solution Approach 2:
The discharge passages enable preliminary discharge of refrigerant before the compression stroke completes, preventing the pressure conditions that would lead to reliability deterioration. This timing ensures that side pressure remains within safe limits throughout the compression cycle.
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 effectively suppresses side pressure and friction loss, preventing refrigerant pressure from exceeding discharge pressure, thereby enhancing compressor reliability and efficiency by ensuring residual refrigerant is discharged, reducing wear and maintaining performance.
Implementation Method 1
a roller performing an orbiting movement in a compression space of a cylinder
Implementation Method 2
a vane in contact with an outer circumferential surface of the roller to partition the compression space of the cylinder into a plurality of spaces
Data Source
AI summary
A rotary compressor includes at least one cylinder in which a discharge guide groove is disposed at one side of a vane slot; a roller orbitably provided in the cylinder, and disposed with a hinge groove on an outer circumferential surface thereof; a vane in which one end portion thereof is rotatably inserted into the hinge groove of the roller, and the other end portion thereof is slidably inserted into the vane slot of the cylinder; and a plurality of bearing plates that seals both side surfaces of the cylinder, and at least one side of which is disposed with a discharge port to communicate with the discharge guide groove. The discharge port communicates with a refrigerant residual space defined between the vane slot and the discharge guide groove. Refrigerant in the refrigerant residual space may be discharged even after the roller passes through the discharge guide groove.