Scroll Compressor Pillar Member Prevents Self-Rotation
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Solution Overview
Problem
Conventional scroll compressors face reliability issues due to the stationary scroll being overturned by gas force within the compressing chamber, leading to degraded performance, as they lack effective mechanisms to prevent self-rotation and ensure hermetic properties.
Innovation Solution
The scroll compressor design includes a partition plate dividing the container into high and low pressure spaces, a stationary scroll with a spiral lap, an orbiting scroll, a self-rotation preventing member, and a main bearing, with a pillar-shaped member engaging the bearing and scroll sections to prevent self-rotation and ensure axial movement of the stationary scroll, enhancing hermeticity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stationary scroll is allowed to move axially to improve hermetic properties, then the hermetic seal between scrolls is improved, but the stationary scroll may be overturned by gas force or rocked, degrading reliability
Solution Approach 1:
A pillar-shaped member is introduced as an intermediary element between the stationary scroll and the container wall. This pillar member provides axial movement freedom while preventing lateral displacement and overturning, thus mediating between the need for hermetic seal improvement and stationary scroll stability
Solution Approach 2:
The support function is segmented into multiple independent pillar-shaped members distributed around the stationary scroll. This segmentation allows the stationary scroll to move axially for hermetic sealing while each pillar independently prevents lateral displacement and overturning moments
2Stability of the object's composition
If the stationary scroll is constrained to prevent overturning, then reliability is improved, but the hermetic properties and compression performance are degraded
Solution Approach 1:
The pillar-shaped member acts as a mediator that selectively constrains the stationary scroll - allowing axial movement for hermetic sealing while preventing lateral displacement and rotation, thus resolving the contradiction between stability and hermetic properties
3Reliability
If tip-seal is used to strengthen hermetic properties, then sealing is improved, but the compressor cannot achieve high efficiency due to lack of back pressure
Solution Approach 1:
The tip-seal component is extracted/eliminated from the design. Instead of using tip-seal, the patent achieves hermetic properties through the pillar-shaped member support system that enables back pressure application, thus improving compression efficiency without compromising sealing
Solution Approach 2:
The pressure distribution parameter is changed by eliminating tip-seal and using the pillar-supported stationary scroll configuration. This allows back pressure to be applied to the orbiting scroll, changing the pressure parameters to improve compression efficiency while maintaining hermetic properties
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A scroll compressor includes a pillar-shaped member (100) that is inserted into a scroll-side engagement section (101) formed on a stationary scroll (30). A lower end-face of an engagement section between the pillar-shaped member (100) and the scroll-side engagement section (101) is located above a lap end-face of a stationary spiral lap (32).