Scroll Compressor Housing Fin Segmentation for Stress Relief
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Solution Overview
Problem
The existing scroll compressor designs face issues with heat radiating fin deformation and strength due to pressure-induced stress and manufacturing defects, such as cracks and cavities, which compromise cooling performance and structural integrity.
Innovation Solution
A scroll compressor design featuring a housing with heat radiating fins divided into multiple parts in the refrigerant flow direction, combined with ribs to distribute stress and prevent obstruction, enhancing cooling efficiency and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat radiating fins are provided on the housing to improve cooling performance, then cooling performance is improved, but the housing bottom surface deforms under pressure causing stress and damage to the fins
Solution Approach 1:
The heat radiating fin is divided into multiple segments along the flow direction, with each segment independently supported by ribs. This segmentation reduces the stress on each individual fin segment when the housing deforms under pressure, preventing fin damage while maintaining the overall cooling surface area.
2Temperature
If heat radiating fins are formed on the housing through casting to improve cooling, then cooling performance is improved, but cracks and cavities are generated due to thickness increase during manufacturing
Solution Approach 1:
By dividing the heat radiating fin into multiple thinner segments rather than forming one thick continuous fin, the casting process can complete more easily without generating cracks or cavities. Each segment maintains adequate thickness for heat dissipation while avoiding the manufacturing defects associated with thick sections.
Solution Approach 2:
The ribs are strategically positioned to provide localized support to each fin segment at critical points. This localized reinforcement allows the fins to maintain their cooling function while using minimal additional material, avoiding the need for thick sections that would cause casting defects.
3Temperature
If continuous heat radiating fins are provided to maximize cooling surface area, then cooling performance is improved, but great stress is caused when the housing deforms under pressure
Solution Approach 1:
The continuous fin structure is segmented into multiple discrete sections, each supported by individual ribs. This segmentation breaks the stress path, so when the housing deforms under pressure, the stress is distributed across multiple small segments rather than concentrated in a single continuous fin, significantly reducing the stress on each segment.
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
The design improves cooling performance by maximizing the leading edge effect and reduces stress on the heat radiating fins, thereby enhancing the compressor's strength and reducing the likelihood of defects during manufacturing.
Implementation Method 1
the heat radiating fin... extends in a flowing direction of the refrigerant... maximizing the leading edge effect
Implementation Method 2
heat radiating fin that is formed on the bottom surface, that extends in a flowing direction of the refrigerant
Data Source
AI summary
This scroll compressor comprises: a shaft that is capable of rotating about an axis; a motor that rotatably drives the shaft; a compressor body that is driven by the rotation of the shaft; a housing that covers the motor and the compressor body and that has a bottom surface facing the motor from the axial direction; an intake port that guides a refrigerant into the housing; and heat-dissipating fins that are formed on the bottom surface, that extend in the direction in which the refrigerant flows, and that are divided in the flow direction.