Scroll Compressor Suction Passage Offset Design
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Solution Overview
Problem
The existing scroll compressor design faces difficulties in processing and connecting pipes due to the radial enlargement of the compression mechanism, which shifts the suction hole and through hole closer to the casing barrel, making it challenging to avoid interference with the bent portion of the lid during welding and machining.
Innovation Solution
The suction passage is configured such that the center of the outflow opening is closer to the axis of the barrel than the center of the through hole, allowing the outflow opening to connect reliably to the suction hole even when the compression mechanism is enlarged radially outward, and the through hole is positioned closer to the axis to avoid interference with the bent portion of the lid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the compression mechanism is enlarged radially outward to increase compression chamber capacity, then the compression capacity is improved, but the position of the suction hole and through hole shifts radially outward closer to the barrel, making processing such as welding difficult
Solution Approach 1:
The suction passage is configured with a non-linear spatial arrangement where the outflow opening connects to the suction hole through a path that changes direction. Specifically, the suction passage extends in a direction different from the axial direction of the barrel, allowing the outflow opening to reach the suction hole despite the radial shift in hole positions caused by compression mechanism enlargement
Data Source
Figure 1
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AI summary
A suction passage (C) includes an insertion pipe portion (65, 91) inserted into a through hole (83) of a lid (22) of a casing (20), and an in-plate passage (73, 92, 94) formed in a fixed-side end plate (42) and having an outflow opening (78) opened toward a suction hole (46). A center (p2) of the through hole (83) is closer to an axis (P) of a barrel (21) than a center (p1) of the outflow opening (78) of the in-plate passage (73, 92, 94).