Refrigerant Compressor
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Solution Overview
Problem
Existing refrigerant compressors face challenges in operating energy-efficiently while maintaining a simple construction, particularly in reducing mechanical loads during performance reduction.
Innovation Solution
A mechanical performance control unit is introduced, allowing the low-pressure and high-pressure sides to be connected for performance reduction, accompanied by a nonreturn valve at the cylinder head to manage refrigerant flow, thereby reducing mechanical loads and maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a mechanical performance control unit is used to reduce compressor conveying performance, then energy efficiency is improved, but pressure and temperature fluctuations occur in the reciprocating piston compressor
Solution Approach 1:
A nonreturn valve is introduced as an intermediary component between the outlet chamber and the performance control unit. This valve allows controlled backflow of refrigerant to the inlet side while preventing uncontrolled reverse flow, thereby mediating the pressure equalization process and eliminating harmful pressure and temperature fluctuations during performance reduction
Solution Approach 2:
The patent replaces complex mechanical load control mechanisms with a simpler pressure equalization system using the nonreturn valve and performance control unit. This substitution eliminates the need for complex mechanical interventions while achieving smooth performance transition without harmful fluctuations
2Productivity
If the outlet chamber volume is increased to improve performance control, then performance reduction capability is improved, but device complexity increases
Solution Approach 1:
The outlet chamber is designed to serve multiple functions: it acts as both the compression chamber outlet and the control volume for performance reduction. The same chamber that receives compressed refrigerant also serves as the reservoir for controlled backflow, eliminating the need for separate control chambers or additional structural components
Solution Approach 2:
The patent merges the outlet chamber with the performance control function, combining what could be separate components into a single integrated structure. This merging reduces device complexity while maintaining full performance control capability across different operating conditions
3Stability of the object's composition
If a nonreturn valve is installed in the outlet chamber to prevent backflow, then pressure stability is improved, but device complexity increases
Solution Approach 1:
The nonreturn valve is designed as a passive, self-actuating component that automatically responds to pressure differential without external control. The valve opens when outlet pressure exceeds inlet pressure and closes when reverse pressure occurs, providing automatic pressure stabilization without requiring actuators, sensors, or complex control mechanisms
Solution Approach 2:
The nonreturn valve is implemented as a simple, inexpensive mechanical component rather than a complex electronically controlled system. This simple valve design provides reliable pressure stability at minimal cost and structural 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
This solution enables efficient operation with reduced mechanical loads, avoiding pressure and temperature fluctuations, and allowing for performance reduction without complex structural changes.
Implementation Method 1
a nonreturn valve (220) that is held against the cylinder head (92) and that allows a refrigerant stream exiting therefrom on the high-pressure side and blocks a refrigerant stream counter to this exiting refrigerant stream
Data Source
AI summary
In order to operate as energy-efficiently as possible a refrigerant compressor, comprising a reciprocating piston compressor and an electric motor, an overall housing having a motor housing portion for the electric motor and a compressor housing portion for the reciprocating piston compressor, a suction connector connected to a low-pressure side of the reciprocating piston compressor, a pressure connector connected to a high-pressure side of the reciprocating piston compressor, wherein provided in the compressor housing portion is at least one cylinder of the reciprocating piston compressor, which has a piston that is movable in a cylinder bore formed in the compressor housing portion, a valve plate closing the cylinder bore, and a cylinder head that spans the valve plate and forms part of the compressor housing portion, it is proposed that a mechanical performance control unit should be provided by which the low-pressure side and the high-pressure side are connectable to one another for the purpose of reducing performance, and that there should be provided in the region of the cylinder head a nonreturn valve that is held against the cylinder head and that allows a refrigerant stream exiting therefrom on the high-pressure side and blocks a refrigerant stream counter to this refrigerant stream.