Scroll Compressor Subframe Oil Recovery Flow Path
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Solution Overview
Problem
Conventional scroll compressors face issues with oil recovery due to the use of copper pipes, which are prone to vibration-induced damage, deformation, and refrigerant leakage, leading to reduced volumetric efficiency, increased noise, and complex manufacturing processes.
Innovation Solution
The scroll compressor incorporates an oil pump recovery structure with an oil recovery flow path formed in the subframe, eliminating the need for conventional copper pipes. This design enhances rigidity, reduces vibration and noise, and simplifies the manufacturing process by reducing the number of parts and avoiding complex press-fitting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a curved copper pipe is used for oil recovery, then rigidity and vibration resistance are improved, but deformation occurs due to structural weakness when press-fitted into the oil pickup
Solution Approach 1:
The patent integrates the oil recovery flow path directly into the subframe structure, merging the previously separate copper pipe component with the subframe. This eliminates the press-fitting connection that caused deformation while maintaining rigidity through the unified structural design.
Solution Approach 2:
The patent removes the copper pipe from the system entirely, extracting the problematic component that caused deformation. The oil recovery function is retained through the integrated subframe flow path, eliminating the reliability issue while preserving the necessary rigidity.
2Ease of manufacture
If a straight copper pipe is used for oil recovery, then manufacturing simplicity is improved, but the pipe is damaged due to insufficient rigidity under vibration
Solution Approach 1:
The patent combines the oil recovery flow path with the subframe structure, creating an integrated component that provides both manufacturing simplicity (as part of the subframe) and sufficient rigidity (through structural integration). This eliminates the need for separate copper pipe manufacturing and assembly.
Solution Approach 2:
The subframe is designed to serve multiple functions: structural support and oil recovery flow path. This multi-functionality eliminates the need for a separate copper pipe component, achieving both manufacturing simplicity and structural rigidity through a single integrated part.
3Stability of the object's composition
If a curved copper pipe is used for oil recovery, then vibration resistance is improved, but the press-fitting base loosens due to external excitation sources
Solution Approach 1:
The patent merges the oil recovery flow path with the subframe structure, eliminating the press-fitting connection that loosened under vibration. The integrated design ensures that the flow path and subframe move as a unified structure, preventing relative motion and base loosening while maintaining vibration resistance.
Solution Approach 2:
The patent removes the press-fitting connection between the copper pipe and subframe, extracting the source of loosening problems. The oil recovery function is maintained through the integrated subframe design, eliminating reliability issues while preserving vibration resistance through structural unity.
4Strength
If a curved copper pipe is used for oil recovery, then rigidity is improved, but manufacturing complexity increases due to special jigs and extrusion molds
Solution Approach 1:
The patent integrates the oil recovery flow path into the subframe structure, combining what were previously separate manufacturing processes. This eliminates the need for special copper pipe jigs and extrusion molds, reducing manufacturing complexity while maintaining the rigidity benefits through structural integration.
Solution Approach 2:
The subframe serves multiple functions including structural support and oil recovery, eliminating the need for separate copper pipe manufacturing. This multi-functionality reduces device complexity by removing specialized manufacturing equipment while maintaining rigidity through the integrated design.
5Stability of the object's composition
If a curved copper pipe is used for oil recovery, then vibration resistance is improved, but assembly complexity increases due to manual press-fitting processes
Solution Approach 1:
The patent merges the oil recovery flow path with the subframe structure, eliminating the manual press-fitting assembly step. The integrated design allows the flow path to be formed as part of the subframe manufacturing process, reducing assembly complexity while maintaining vibration resistance through structural unity.
Solution Approach 2:
The subframe performs multiple functions including structural support and oil recovery, eliminating the need for separate copper pipe installation. This multi-functionality simplifies the assembly process by removing manual press-fitting steps while preserving vibration resistance through the integrated design.
Data Source
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AI summary
A scroll compressor includes a casing (19) having an oil storage space (S11), a suction pipe (13) and a discharge pipe (14) being connected to the casing, a driving motor (20) installed in an inner space of the casing and including a rotating shaft (23) rotating by generated driving force, a compression unit (30) installed in the inner space of the casing and having a compression chamber operated by the driving motor (20) to compress a refrigerant, an oil separator (200) coupled to the discharge pipe, receiving a refrigerant discharged after being compressed by the compression unit, separating oil, and supplying the separated oil to an inside of the casing, a subframe (12) rotatably supporting the rotating shaft (23) from one side of the rotating shaft, wherein the subframe is provided an oil recovery flow path (212b) provided in a radial direction and guiding oil to be recovered toward the inside of the casing from the oil separator (200).