Screw compressor, air conditioning device and refrigerating device
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Solution Overview
Problem
Existing screw compressors experience significant gas flow pulsation and noise due to large diameter axial gas-supplement holes, which affects compression efficiency and noise levels.
Innovation Solution
A screw compressor design featuring multiple gas-supplement holes with smaller diameters, arranged in a specific pattern corresponding to the male screw's outer contour, reducing gas flow pulsation and noise by distributing the gas flow more evenly through the compression chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single large diameter axial gas-supplement hole is used, then the gas-supplement channel structure is simple, but gas flow pulsation and noise increase significantly
Solution Approach 1:
The single large diameter gas-supplement hole is divided into multiple smaller diameter holes. This segmentation reduces gas flow pulsation and noise while maintaining the gas-supplement function, directly resolving the contradiction between structural simplicity and harmful gas flow characteristics.
Solution Approach 2:
The hole diameter parameter is changed from large to small, and the number of holes is increased. This parameter transformation reduces the harmful gas flow pulsation and noise while preserving the essential gas-supplement function.
2Object-generated harmful factors
If multiple smaller diameter gas-supplement holes are used, then gas flow pulsation and noise are reduced, but the gas-supplement channel structure becomes more complex
Solution Approach 1:
The gas-supplement hole is segmented into multiple smaller holes arranged in specific patterns. This segmentation achieves the goal of reducing gas flow pulsation and noise while the structured arrangement maintains reasonable design complexity.
Solution Approach 2:
Different regions of the gas-supplement channel are designed with different hole distributions. The holes are arranged in patterns corresponding to the male screw's outer contour, creating local quality variations that optimize gas flow distribution and reduce pulsation while maintaining structural coherence.
3Object-generated harmful factors
If gas-supplement holes are arranged in a pattern corresponding to the male screw's outer contour, then gas flow distribution is improved and pulsation is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The gas-supplement holes are arranged in local patterns that correspond to the male screw's outer contour. This local quality approach improves gas flow distribution and reduces pulsation while concentrating precision requirements to specific geometric relationships that can be manufactured with standard tolerances.
Solution Approach 2:
The hole arrangement follows the curved outer contour of the male screw, creating a geometric pattern that naturally distributes gas flow along the compression chamber. This curvature-based arrangement improves gas flow uniformity while the pattern can be manufactured using conventional machining methods.
Data Source
Figure 1~2
Figure 3~4
AI summary
Disclosed are a screw compressor, and a gas conditioning apparatus and a refrigeration apparatus including the screw compressor. The screw compressor includes a body (10), in which a gas-supplement channel is provided, and the gas-supplement channel has at least two gas-supplement holes (201) communicated with a compression chamber. A number of the gas-supplement holes in the screw compressor is at least two. Ina case that space available in the body (10) for disposing the gas-supplement holes (201) is limited, a hole diameter of each of the gas-supplement holes (201) is smaller. A larger number of gas-supplement holes (201) with smaller hole diameter are beneficial for reducing gas flow pulsation, thereby reducing noise in a gas-supplement process.