Piston Compressor Valve Layout for Larger Flow Area

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Solution Overview

Problem

Existing piston compressors face challenges in optimizing the flow area of suction and discharge valve sections, leading to higher dead volumes and reduced volumetric and isentropic efficiencies, particularly with reed valves, which are difficult to design with effective flow areas without increasing dead volume.

Innovation Solution

The valve arrangement features a frustopyramidal or frustoconical form for the suction valve section with self-actuated check valves, including reed valves and finger blades, and a perpendicular discharge valve section, optimizing fluid flow without significantly increasing dead volume.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If reed valves are used in the suction valve section, then the device complexity is reduced and ease of manufacture is improved, but the flow area is limited and dead volume increases

Engineering Contradiction:

Improveease of manufactureVSAvoidflow area

Core Design Contradiction:

Ease of manufactureVSArea of stationary object

Solution Approach 1:

The suction valve section is designed with a frustopyramidal or frustoconical three-dimensional shape instead of a conventional flat or cylindrical form. This dimensional change allows the valve section to expand the flow area in radial and axial directions simultaneously, providing larger fluid passage without increasing the horizontal footprint or dead volume significantly.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If the flow area of the suction valve section is increased, then the volumetric efficiency and isentropic efficiency are improved, but the dead volume increases

Engineering Contradiction:

Improvevolumetric efficiencyVSAvoiddead volume

Core Design Contradiction:

ProductivityVSVolume of stationary object

Solution Approach 1:

The frustopyramidal or frustoconical shape utilizes curved surfaces and angled facets that smoothly guide fluid flow from the suction ports through the valve section. This curved geometry reduces flow resistance and turbulence, allowing larger flow areas to be achieved without proportionally increasing the volume occupied by the valve section structure, thereby improving volumetric efficiency while controlling dead volume.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Productivity

If the valve section geometry is optimized for flow area, then the mechanical efficiency and overall performance are improved, but the device complexity increases

Engineering Contradiction:

Improvemechanical efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The suction valve section employs an asymmetric frustopyramidal or frustoconical geometry with specifically angled lateral faces rather than symmetric conventional shapes. This asymmetric design optimizes the flow paths for the specific compression cycle requirements, improving mechanical efficiency by reducing flow resistance and enhancing valve closure characteristics, while the asymmetry itself becomes the simplifying feature rather than adding complexity.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentEP4715210A1Piston compressor valve arrangement and method of use

Publication Date: 2026.03.25 HEATEN AS

Figure 1
Figure 2a~2b
Figure 2c~2d

AI summary

A cylinder head (400, 4000) for a piston compressor, the cylinder head (400, 4000) comprising a suction valve section (200, 2001), a discharge valve section (300, 3001), and an extended cup (500, 5001) forming a discharge channel (510, 5101), wherein the suction valve section (200, 2001) is extended at its upper end to form the extended cup (500, 5001).