Refrigerant compressor
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Solution Overview
Problem
Existing refrigerant compressors face challenges in operating energy-efficiently, particularly in reducing mechanical loads and maintaining efficiency during performance reduction.
Innovation Solution
The implementation of a mechanical power tax unit that connects the suction side and pressure side to reduce performance, combined with a check valve at the cylinder head to manage refrigerant flow and prevent pressure drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a mechanical power control unit is used to reduce compressor capacity, then energy efficiency is improved, but pressure fluctuations and temperature peaks occur that reduce efficiency
Solution Approach 1:
The check valve is pre-positioned in the outlet chamber to anticipate and prevent harmful pressure fluctuations before they occur during power reduction, ensuring smooth refrigerant flow and maintaining compressor efficiency
2Force
If power is reduced by connecting suction and pressure sides, then mechanical load is reduced, but pressure peaks and temperature peaks occur
Solution Approach 1:
The check valve acts as an intermediary element between the outlet chamber and the power control connection, mediating the refrigerant flow to prevent direct pressure peaks and temperature excursions when power is reduced
3Stress or pressure
If a check valve is added to the cylinder head, then pressure drop is prevented, but device complexity increases
Solution Approach 1:
The check valve is implemented as a separate, modular component that can be independently installed in the cylinder head, allowing the pressure control function to be added without redesigning the entire compressor system
4Reliability
If the check valve is positioned downstream of the outlet chamber, then backflow is prevented, but installation complexity increases
Solution Approach 1:
The check valve is integrated with the outlet chamber structure, merging the flow control function with the existing housing to simplify installation while maintaining reliable backflow prevention
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 allows for efficient control of compressor promotion, reduces mechanical loads on compressor components, and maintains efficiency by minimizing pressure fluctuations and temperature variations.
Implementation Method 1
a check valve is provided in the region of the cylinder head which is held thereon and which allows a refrigerant flow emerging from the cylinder head and blocks a refrigerant flow opposite to this refrigerant flow
Implementation Method 2
the mechanical power control unit connects the outlet-side refrigerant path on the pressure side with the inlet-side refrigerant path on the suction side in order to reduce the power in at least one cylinder
Data Source
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AI summary
To operate a refrigerant compressor, comprising a reciprocating compressor and an electric motor, an overall housing which has a motor housing section for the electric motor and a compressor housing section for the reciprocating compressor, a suction port connected to a suction side of the reciprocating compressor, a pressure port connected to a pressure side of the reciprocating compressor, wherein at least one cylinder of the reciprocating compressor is provided in the compressor housing section, which has a piston movable in a cylinder bore formed in the compressor housing section and a valve plate closing the cylinder bore as well as a cylinder head overlapping the valve plate and forming part of the compressor housing section, in the most energy-efficient way possible, it is proposed that a mechanical power control unit be provided with which the suction side and the pressure side can be connected to each other for power reduction.and that a check valve is provided in the area of the cylinder head, which allows a refrigerant flow exiting the cylinder head on the pressure side and blocks a refrigerant flow in the opposite direction.