Hermetic type compressor
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Solution Overview
Problem
Existing hermetic type compressors face issues with increased manufacturing costs and refrigerant leakage due to independent accumulator and compressor containers, and undetectable weld failures between these components, leading to efficiency and reliability decreases.
Innovation Solution
A hermetic type compressor design where the accumulator container is integrated with the compressor main body container, with multiple independent welded portions allowing easy detection and repair of leaks, and shared components with existing products to reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the accumulator container and compressor main body container are constituted as independent containers, then the refrigerant separation function is achieved, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The patent merges the accumulator container and compressor main body container into a single integrated container structure. The partition wall divides the interior space into an accumulator section and a compressor section, eliminating the need for separate containers and connection brackets. This reduces manufacturing cost and device complexity while maintaining the refrigerant separation function through the partitioned internal structure.
2Stability of the object's composition
If the accumulator container and compressor main body container are connected by a bracket, then the structural stability is improved, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The patent eliminates the bracket connection by integrating the accumulator container and compressor main body container into a single unified structure. The partition wall provides internal separation while the shared container walls and bottom provide structural stability, removing the need for external brackets and reducing device complexity.
3Ease of manufacture
If a single welded portion is used to secure both main shell and accumulator shell to bottom shell, then the manufacturing process is simplified, but the reliability decreases due to undetectable leakage
Solution Approach 1:
The patent segments the welding process into two distinct welded portions: one for securing the main shell to the bottom shell and another for securing the accumulator shell to the bottom shell. This segmentation allows independent leak testing of each welded portion by pressurizing the container with high-pressure gas and submerging it in water, enabling detection of poor welds that would be impossible to detect with a single combined welded portion.
4Manufacturing precision
If high-pressure gas leakage detection method is used, then the welded portion quality can be checked, but the method is ineffective when leakage occurs between compressor main body container and accumulator container
Solution Approach 1:
The patent enables effective leak detection by segmenting the sealed structure into distinct pressure zones separated by the partition wall. The compressor section can be pressurized independently with high-pressure gas while the accumulator section remains at lower pressure. This pressure differential allows water immersion testing to detect leaks at the main shell welded portion without false positives from the accumulator section, and vice versa, solving the detection problem that existed with integrated containers.
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 provides a highly reliable compressor with reduced manufacturing costs and prevents refrigerant leakage between the main body and accumulator containers, enhancing efficiency and reliability.
Implementation Method 1
an opening side of the top shell is secured to an upper end portion of the main shell at a first welded portion by welding, an opening side of the bottom shell is secured to a lower end portion of the main shell at a second welded portion by welding, and an opening side of the accumulator shell is secured to an opposite opening side of the bottom shell at a third welded portion by welding
Data Source
AI summary
A compressor main body container includes a main shell having a vertical cylindrical shape, a top shell having a cup shape, and a bottom shell having a cup shape, and an interior portion of the main shell is hermetically sealed by securing an opening side of the top shell to an upper end portion of the main shell at a first welded portion by welding, and securing an opening side of the bottom shell to a lower end portion of the main shell at a second welded portion by welding. The accumulator container includes an accumulator shell having a cup shape, and an interior portion of the accumulator shell is hermetically sealed by securing an opening side of the accumulator shell to an opposite opening side of the bottom shell at a third welded portion by welding at a position lower than a position of the second welded portion in the compressor main body container.