Reciprocating compressor with non-self-actuated suction valve
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Solution Overview
Problem
Existing gas compressors, particularly those used in heat pumps, face inefficiencies due to high dead volumes and smaller effective flow areas in reed valve systems, leading to lower volumetric and isentropic efficiencies.
Innovation Solution
The implementation of a reciprocating compressor design that combines non-self-actuated poppet valves for suction and self-actuated check valves, such as reed or ball check valves, for discharge, optimizing valve performance and reducing dead volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If reed valve systems are used in compressors, then the device complexity is reduced and ease of manufacture is improved, but the volumetric efficiency and isentropic efficiency deteriorate due to high dead volumes and smaller effective flow areas
Solution Approach 1:
The valve system is segmented into two distinct types: self-actuated check valves for the discharge port and non-self-actuated valves for the suction port. This segmentation allows each valve type to be optimized for its specific function, with the discharge valve handling high-pressure flow and the suction valve handling low-pressure flow, thereby improving overall volumetric efficiency while maintaining manufacturing simplicity
Solution Approach 2:
Different valve configurations are applied to different locations within the compressor. The discharge port receives self-actuated check valves optimized for high-pressure flow control, while the suction port receives non-self-actuated valves optimized for low-pressure flow. This local differentiation ensures that each valve operates at optimal performance for its specific pressure condition, improving volumetric efficiency without requiring complex manufacturing across the entire system
2Device complexity
If reed valve systems are used in compressors, then the device complexity is reduced, but the effective flow area is reduced leading to lower isentropic efficiency
Solution Approach 1:
The valve system is divided into self-actuated and non-self-actuated components positioned at different ports. The non-self-actuated suction valves are designed with larger effective flow areas optimized for low-pressure gas intake, while the self-actuated discharge valves handle high-pressure flow. This segmentation allows each valve type to be independently optimized for its pressure condition, improving isentropic efficiency without increasing overall device complexity
Solution Approach 2:
The valve design incorporates different geometric parameters for suction and discharge ports. The suction valves feature larger opening areas and different flow path geometries optimized for low-pressure flow, while discharge valves are optimized for high-pressure flow control. These parameter changes enable each valve to operate at optimal efficiency for its specific pressure condition while maintaining relatively simple overall device architecture
3Productivity
If non-self-actuated poppet valves are used for suction and self-actuated check valves for discharge, then the volumetric efficiency and isentropic efficiency are improved, but the device complexity increases
Solution Approach 1:
The valve system segments functionality by port location, using non-self-actuated poppet valves at the suction port and self-actuated check valves at the discharge port. This segmentation allows each valve type to be optimized for its specific pressure condition, improving volumetric efficiency while limiting complexity increases to only the necessary components rather than the entire valve system
Solution Approach 2:
Different valve actuation mechanisms are applied locally at different ports based on pressure conditions. The suction port uses simpler non-self-actuated valves suitable for low-pressure flow, while the discharge port uses self-actuated check valves optimized for high-pressure flow control. This local differentiation improves volumetric efficiency without requiring complex mechanisms throughout the entire valve system
Data Source
AI summary
A reciprocating compressor having: a suction valve; a discharge valve; and a working chamber; wherein the suction valve is configured to provide fluid communication between a suction channel and the working chamber and the discharge valve is configured to provide fluid communication between the working chamber and a discharge channel; wherein the suction valve has at least one non-self-actuated valve and the discharge valve has at least one self-actuated check valve.