Angled Reed Valve Scroll Compressor Discharge Port
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Solution Overview
Problem
Scroll compressors experience reverse rotation and re-expansion losses due to the volume of discharge ports upstream of the valve, leading to unwanted noise and inefficiency, which existing discharge valve designs fail to adequately minimize.
Innovation Solution
A reed valve is positioned at an angle relative to the drive axis of the scroll compressor, with the pin located further from the compression chambers and the valve body closer, reducing the upstream volume of refrigerant and minimizing reverse rotation and re-expansion losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reed valve is pinned to the base of a scroll member, then the valve can be firmly held, but the upstream volume of the discharge port cannot be minimized
Solution Approach 1:
The valve body is positioned at an angle relative to the drive axis, creating a non-perpendicular arrangement that reduces the upstream volume while maintaining adequate pin engagement. This angular orientation (claiming approximately 30-60 degrees from perpendicular) allows the valve to achieve both compact volume and reliable pin attachment by utilizing three-dimensional spatial optimization rather than a simple perpendicular mounting approach.
2Loss of energy
If the discharge port volume is minimized, then reverse rotation and re-expansion losses are reduced, but the valve assembly becomes more complex
Solution Approach 1:
The valve body is positioned asymmetrically at an angle relative to the drive axis rather than symmetrically perpendicular to it. This asymmetric angular positioning (approximately 30-60 degrees from perpendicular) creates an optimized flow path that minimizes upstream volume and reduces re-expansion losses, while the asymmetry itself becomes the defining characteristic of the simplified design rather than adding complexity.
Data Source
AI summary
A scroll compressor has a reed valve mounted on a central discharge port. The reed valve has a valve portion at a first end and a pin holding the reed valve onto a non-orbiting scroll member at a second end. The reed valve extends along a plane which is non-perpendicular to a drive axis of a drive shaft such that the second end, which receives the pin, is further removed from the compression chambers than is the first end of the reed valve, which covers the central discharge port.