Refrigeration system
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Solution Overview
Problem
The arrangement of an ejector at the suction port of a compressor in existing cooling systems can destabilize and compromise the safety and service life of the compressor due to unstable airflow and elevated suction temperatures, affecting compressor oil properties and overall safety.
Innovation Solution
A cooling system design featuring an ejector connected to an economizer on the discharge side of the compressor, along with a gas-liquid separator and oil separator, which enables two-stage pressurization without compromising compressor stability or safety, and includes a throttling device between the economizer and evaporator or condenser to enhance energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an ejector is arranged at the suction port of the compressor to improve energy efficiency ratio, then the energy efficiency ratio of the cooling system is improved, but the stability and safety of the compressor is affected due to unstable airflow and elevated suction temperatures
Solution Approach 1:
The patent introduces a gas-liquid separator as an intermediary component between the ejector and the compressor. This separator mediates the interaction by stabilizing the airflow before it enters the compressor, thus maintaining the energy efficiency benefits of the ejector while protecting the compressor from unstable airflow and high suction temperatures.
2Loss of energy
If two-stage compressors or air-supplementing enthalpy-increasing compressors are used to improve energy efficiency ratio, then the energy efficiency ratio is improved, but the cost and structural complexity increase making them difficult to repair
Solution Approach 1:
The patent segments the compression function by introducing an ejector as a separate component that performs part of the compression work through its injection mechanism. This allows the use of a simpler single-stage compressor while achieving two-stage compression效果, thereby reducing complexity and improving maintainability while maintaining energy efficiency.
Solution Approach 2:
The ejector acts as an intermediary device that supplements the compressor's work by utilizing pressure differential to inject and compress refrigerant. This mediator approach achieves enhanced compression capability without requiring a complex two-stage compressor design.
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 configuration improves the energy efficiency ratio by up to 18% compared to prior art, ensuring high cooling capacity and energy savings while maintaining compressor stability and safety, outperforming traditional systems in energy efficiency and operational reliability.
Implementation Method 1
the ejector is enabled to mix a low-pressure fluid with a high-pressure fluid, and a turbulent diffusion effect of the jet can be utilized to increase the pressure of output fluid
Data Source
AI summary
A refrigeration system, comprising an evaporator, a condenser, a throttling device, a compressor, an economizer and an ejector, these devices together form a closed-loop refrigerant circulation loop, the ejector being connected to the economizer, and the ejector being provided on an exhaust side of the compressor. The structure enables the refrigeration system to realize the dual-stage boost, does not affect the stability of the compressor due to the instability of the airflow of the ejector, and does not affect the oil property of the compressor, thereby ensuring the operation safety of the compressor.