Liquid-Cooled Compressor Nozzle Injection Port Diameter Optimization
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Solution Overview
Problem
In liquid-cooled compressors, the pressure difference between stages results in insufficient refrigerant supply at higher stages, leading to inadequate cooling and reduced compression power, while reducing oil supply port diameter increases fluid resistance and lowers lubricant quantity.
Innovation Solution
The implementation of a liquid-cooled compressor with multiple nozzles, where the second nozzle has larger injection ports than the first nozzle, and a collision spray type nozzle design with adjustable nozzle hole diameters and angles to optimize refrigerant distribution across stages, ensuring efficient cooling and lubricant supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the oil supply port diameter is reduced to decrease refrigerant particle diameter for efficient cooling, then the cooling efficiency is improved, but the fluid resistance increases and the quantity of lubricant supplied decreases
Solution Approach 1:
The patent applies local quality by differentiating the injection port diameters between nozzles based on their specific locations and functions. The first nozzle (lower stage) has smaller injection ports optimized for cooling, while the second nozzle (higher stage) has larger injection ports optimized for lubricant supply. This localized differentiation allows each nozzle to perform its specific function optimally without compromising the other.
2Ease of manufacture
If the same oil supply port diameter is used at all stages, then the manufacturing is simplified, but the refrigerant supply quantity becomes insufficient at higher stages due to pressure differences
Solution Approach 1:
The patent implements local quality by assigning different injection port diameters to nozzles at different compression stages. The first nozzle at the lower stage has a smaller injection port diameter (0.3-0.8mm) for effective cooling, while the second nozzle at the higher stage has a larger injection port diameter (0.8-1.5mm) to overcome higher back pressure and ensure sufficient refrigerant and lubricant supply.
3Quantity of substance
If larger injection ports are used at the second nozzle, then the lubricant supply quantity is maintained, but the refrigerant particle diameter increases reducing cooling efficiency
Solution Approach 1:
The patent applies local quality by optimizing each nozzle's injection port diameter according to its specific operational requirements. The first nozzle uses smaller ports (0.3-0.8mm) for fine refrigerant atomization and cooling, while the second nozzle uses larger ports (0.8-1.5mm) to ensure adequate lubricant flow despite higher stage pressure, with each configuration locally optimized for its function.
4Device complexity
If the pressure difference is not compensated for between stages, then the system design is simplified, but the cooling amount and compression power reduction effect are insufficient at higher stages
Solution Approach 1:
The patent applies parameter changes by modifying the injection port diameter parameter based on the stage position. The first nozzle has injection ports of 0.3-0.8mm diameter, while the second nozzle has injection ports of 0.8-1.5mm diameter. This parameter adjustment compensates for the pressure difference between stages, ensuring adequate refrigerant and lubricant supply at the higher pressure second stage while maintaining cooling effectiveness.
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 efficiently cools air during compression and reduces compression power by maintaining adequate lubricant supply and particle size, addressing the limitations of conventional technologies.
Implementation Method 1
a liquid-cooled type compressor including: a liquid-cooled type compressor body; at least one first nozzle; and at least one second nozzle that is disposed on a high pressure side as compared to the first nozzle. Further, the at least one first nozzle and the at least one second nozzle each has a plurality of injection ports per nozzle and supplies a refrigerant through the injection ports into an inside of the compressor body
Implementation Method 2
the pressure of the air, inside the compressor, with which the refrigerant contacts at an oil supply port
Data Source
AI summary
The present invention effectively cools air in a compression process at a high stage when an oil is supplied at the same pressure at a low stage and the high stage. Provided is a liquid-cooled type compressor including: a liquid-cooled type compressor body; at least one first nozzle; and at least one second nozzle, the at least one first nozzle and the at least one second nozzle each having a plurality of injection ports per nozzle and supplying a refrigerant through the injection ports into an inside of the compressor body, the second nozzle having the injection ports each having a diameter larger than a diameter of each of the injection ports of the first nozzle.