Inclined Axis Discharge Valve for Scroll Compressor Pressure Drop

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Solution Overview

Problem

Conventional discharge valves in scroll compressors cause significant pressure drop and energy consumption due to high flowing resistance, as the fluid flow direction is frequently turned by 90 degrees, leading to reduced efficiency.

Innovation Solution

A discharge valve with a valve body featuring a fluid inlet and outlet axis direction inclined relative to each other, reducing the need for multiple 90-degree turns, and incorporating a valve flap and stop for minimal resistance, with optional multiple fluid outlets and a piston for capacity modulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the conventional discharge valve structure with perpendicular valve seat and multiple 90-degree flow direction turns is used, then the valve can effectively prevent fluid backflow, but the flowing resistance increases significantly causing pressure drop and energy consumption

Engineering Contradiction:

Improvefluid backflow preventionVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent inverts the conventional valve seat orientation from perpendicular to inclined relative to the fluid inlet axis. This inversion changes the flow path geometry, allowing fluid to pass through with minimal direction changes, thereby reducing flowing resistance and energy loss while maintaining backflow prevention capability through the valve flap mechanism

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces an inclined dimension to the valve seat arrangement, transitioning from a conventional perpendicular (90-degree) configuration to an inclined configuration. This dimensional change optimizes the flow path alignment, reducing the need for sharp 90-degree turns and minimizing pressure drop across the valve

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of manufacture

If the conventional discharge valve with multiple 90-degree flow direction turns is used, then the valve structure is simple and easy to manufacture, but the flowing resistance causes significant pressure drop reducing compressor efficiency

Engineering Contradiction:

Improvevalve structure simplicityVSAvoidcompressor efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent changes the geometric parameter of the valve seat orientation from perpendicular to inclined relative to the fluid inlet axis. This parameter modification optimizes the flow characteristics, reducing flowing resistance and pressure drop, thereby improving compressor efficiency while maintaining manufacturing simplicity through the basic valve flap and stop mechanism

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9926932B2Discharge valve and compressor comprising same

Publication Date: 2018.03.27 COPELAND CLIMATE TECN (SUZHOU) CO LTD

AI summary

Disclosed is an exhaust valve (10A, 10B, 10C, 10D, 10E), comprising a valve body (12), wherein the first end of the valve body is provided with a fluid inlet (15); the sidewall of the valve body is provided with at least one fluid outlet (17) in fluid communication with the fluid inlet (15) and a valve flap (20) for opening or closing the fluid outlet; and the axis direction of the fluid outlet (17) is inclined relative to that of the fluid inlet (15). Further disclosed is a compressor comprising the above-mentioned exhaust valve. The exhaust valve has a relatively low fluid resistance, and is able to significantly reduce the pressure drop in the compressor due to the exhaust valve, so that the operating efficiency of the compressor is increased.