Scroll Compressor Terminal Fitting With Elliptical Case Opening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing compressor case designs, particularly for scroll compressors using CO2 refrigerants, face durability issues due to local weakening caused by flattening for electrical terminal welding, leading to potential bursts under high pressure and fatigue.
Innovation Solution
The design incorporates an elliptical opening in the compressor case, allowing for a secure fit and welding of the electrical terminal without flattening the case, enhancing stability and durability by maintaining the cylindrical shape and eliminating the need for coining, thus preventing vulnerability to bursts and fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the case is flattened to create a flat surface portion for receiving the electrical terminal, then the electrical terminal can be easily assembled and welded to the case, but the case is weakened and becomes prone to bursts under high pressure
Solution Approach 1:
The invention maintains the curved cylindrical shape of the case and eliminates flattening by using an elliptical opening that conforms to the curvature. The electrical terminal is designed with an elliptical cross-section that matches the elliptical opening in the curved case, allowing for proper fit and welding without compromising the case's structural strength through curvature preservation.
2Ease of operation
If a circular opening is used in the curved case, then the electrical terminal can be inserted, but the fit is not tight and welding is difficult without flattening the case
Solution Approach 1:
The invention transitions from a symmetric circular opening to an asymmetric elliptical opening in the curved case. The elliptical shape, with its major axis aligned with the curvature, provides both ease of insertion and a tight fit that enables proper welding, eliminating the need for case flattening while maintaining manufacturing feasibility.
3Device complexity
If the case is flattened to accommodate the electrical terminal, then assembly is simplified, but the cylindrical shape and structural integrity are compromised
Solution Approach 1:
The invention maintains the cylindrical curved shape of the case by using an elliptical opening that conforms to the curvature. The electrical terminal with elliptical cross-section is designed to fit this opening without requiring flattening, thus preserving the case's structural integrity while enabling assembly.
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 elliptical opening provides a stronger and more stable connection between the electrical terminal and the compressor case, ensuring hermetic sealing and improved durability by maintaining the case's structural integrity under high pressures.
Implementation Method 1
The electrical terminal is placed in the opening and welded to the case
Data Source
AI summary
A compressor for compressing a refrigerant is described. The compressor comprises a case having at least one curved portion and at least one opening, wherein the opening is located in the at least one curved portion, an electrical terminal arranged within the at least one opening and fixed to the case, wherein the at least one opening is an elliptical opening. Also, an electrical terminal for use with a compressor is described.