Scroll Compressor Discharge Chamber Annular Space Noise Reduction
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Solution Overview
Problem
Existing scroll electric compressors face challenges in reducing noise and vibration, primarily due to pulsation of refrigerant in the discharge chamber, which is difficult to mitigate without increasing the compressor's size, especially in the axial direction of the rotary shaft.
Innovation Solution
The design incorporates an annular space around the fixed scroll, defined by a stepped portion, a second peripheral wall, a flange, and an outer peripheral wall, which communicates with the discharge chamber or oil storage chamber, effectively increasing the capacity of the discharge chamber without enlarging the compressor's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the capacity of the discharge chamber is increased to suppress refrigerant pulsation, then noise and vibration are reduced, but the size of the scroll electric compressor increases, especially in the axial direction
Solution Approach 1:
The patent utilizes the radial direction to expand the discharge chamber capacity by creating an annular space around the fixed scroll, rather than expanding in the axial direction. The annular space is formed between the outer peripheral wall of the fixed scroll and the inner peripheral wall of the discharge housing, effectively adding volume in the radial dimension while maintaining compact axial dimensions.
Solution Approach 2:
The annular space is nested around the fixed scroll component, utilizing the space between the fixed scroll's outer peripheral wall and the discharge housing's inner peripheral wall. This nested configuration allows the discharge chamber capacity to be increased without adding external dimensions to the compressor assembly.
2Object-affected harmful factors
If the capacity of the discharge chamber is increased to suppress refrigerant pulsation, then noise and vibration are reduced, but the overall size of the scroll electric compressor increases
Solution Approach 1:
The discharge chamber capacity is expanded by utilizing the radial space around the fixed scroll through the annular space configuration, rather than expanding the overall compressor volume in all directions. This allows effective suppression of refrigerant pulsation while maintaining a compact overall compressor size.
Solution Approach 2:
The annular space is strategically positioned only in the region surrounding the fixed scroll where it is most effective for suppressing refrigerant pulsation, rather than uniformly expanding the discharge chamber throughout the entire compressor. This localized approach increases discharge chamber capacity where needed while minimizing overall compressor size increase.
Data Source
AI summary
A scroll electric compressor includes a housing, a rotary shaft, an electric motor, a fixed scroll, an orbiting scroll, a compression chamber, a discharge chamber, and an oil storage chamber. The housing has a discharge housing including an end wall, a first peripheral wall, a stepped portion, and a second peripheral wall. The fixed scroll has a flange in contact with the second peripheral wall. The stepped portion, the second peripheral wall, the flange, the outer peripheral wall cooperate to define an annular space around the fixed scroll. The annular space is in communication with the discharge chamber or the oil storage chamber.