Scroll Compressor Reed Valve Sealing Against Liquid Compression
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Solution Overview
Problem
Liquid compression in scroll compressors can lead to abnormal pressure increases, causing deformation of the volute walls and reducing reliability, while existing auxiliary discharge ports result in inefficient fluid leakage and reduced compression efficiency due to premature opening of reed valves.
Innovation Solution
A scroll compressor design with a main discharge port and auxiliary discharge ports, each equipped with a reed valve mechanism, featuring increased cross-sectional areas for fluid flow passages and larger sealing surfaces to manage pressure effectively and minimize leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an auxiliary discharge port is formed in the fixed base plate to prevent abnormal pressure buildup, then the reliability is improved, but the compression efficiency deteriorates due to premature opening of the auxiliary reed valve
Solution Approach 1:
The patent applies local quality by creating a localized recessed portion in the fixed base plate at the auxiliary discharge port location. This recessed portion has different structural properties (larger sealing surface area) compared to the main discharge port area, allowing the auxiliary reed valve to remain closed during normal pressure fluctuations while opening only when truly needed to prevent liquid compression damage.
2Productivity
If the auxiliary reed valve sealing surface area is increased to prevent premature opening, then the compression efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent merges the sealing function with the structural support function by integrating the recessed portion directly into the fixed base plate. The recessed portion serves both as a structural feature to increase sealing surface area and as part of the valve mechanism itself, eliminating the need for separate components and reducing overall device complexity.
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 prevents abnormal pressure buildup in compression chambers, maintaining compressor reliability and enhancing efficiency by controlled fluid discharge through optimized reed valve operation.
Implementation Method 1
The auxiliary reed valve opens and closes the auxiliary discharge port... The main reed valve opens and closes the main discharge port
Implementation Method 2
The fixed scroll and the orbiting scroll are meshed with each other to compress fluid in each compression chamber
Data Source
AI summary
A main discharge port is formed at a center of a fixed base plate. An auxiliary discharge port is formed in a portion of the fixed base plate that is different from the main discharge port. The main discharge port includes a main recess that opens toward a main reed valve so as to increase a cross-sectional area of a flow passage for the fluid. The auxiliary discharge port includes an auxiliary recess that opens toward an auxiliary reed valve so as to increase a cross-sectional area of a flow passage for the fluid. A sealing surface area, with which the fixed base plate and the auxiliary reed valve are in contact with each other to seal the auxiliary recess, is larger than a sealing surface area with which the fixed base plate and the main reed valve are in contact with each other to seal the main recess.