Compressor with Internal Accumulator and Eccentric Shaft
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Solution Overview
Problem
Rotary compressors face issues with increased size, complex assembly processes, refrigerant leakage, vibration noise, and reduced design flexibility due to the external installation of the accumulator, which affects the compressor's center of gravity and capacity.
Innovation Solution
The compressor design integrates the accumulator within the shell's internal space, unifying the assembly process, reducing the number of connecting portions, and optimizing the placement of the accumulator's center of gravity to minimize vibration noise and enhance capacity, while supporting the stationary shaft with a reduced bearing length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the accumulator is installed externally, then the assembly process becomes complex and the number of connecting portions increases, but the compressor size increases and design flexibility is reduced
Solution Approach 1:
The accumulator is integrated into the compressor body, merging two separate components into one unified structure. This eliminates the need for external installation and connecting portions, simplifying the assembly process while reducing the overall compressor size and improving design flexibility
2Device complexity
If the accumulator is installed externally, then the connecting portions increase, but refrigerant leakage risk increases
Solution Approach 1:
The accumulator is integrated into the compressor body, eliminating external connecting portions. This merger removes potential leakage points at connections, thereby improving system reliability and preventing refrigerant leakage
3Adaptability or versatility
If the accumulator is installed externally, then the installation flexibility is reduced, but the center of gravity becomes unbalanced causing vibration noise
Solution Approach 1:
The accumulator is integrated into the compressor body, allowing flexible installation positions within the unified structure. This merger enables optimization of the center of gravity position, improving balance and reducing vibration noise while enhancing design flexibility
4Length of stationary object
If the bearing length is reduced, then the stationary shaft support is optimized, but the accumulator chamber positioning becomes more critical
Solution Approach 1:
The accumulator chamber is nested within the compressor body, with its position precisely determined by the integrated structure. This nesting arrangement allows for reduced bearing length while maintaining proper shaft support, as the unified structure provides inherent positioning accuracy
Data Source
AI summary
A compressor is provided having an accumulator that forms an accumulating chamber in an internal space of a shell of the compressor, reducing a size and simplifying an assembly process. A stationary shaft having a refrigerant suction passage may be directly connected to the accumulator to prevent leakage of refrigerant. A center of gravity of the accumulator may correspond to a center of gravity of the compressor to reduce vibration caused by the accumulator. An eccentric portion may be provided at the stationary shaft to secure a spacious compression space. Both ends of the stationary shaft may be supported by a frame to reduce vibration. A rotor and a cylinder may be coupled with a bearing to reduce cylinder deformation. An installation area of the compressor may be minimized to enhance design flexibility of an outdoor device employing the compressor and minimize interference with other components.