CO2 steam-solid particle refrigerating system

Abstract

A CO2 steam-solid grain refrigeration system, which contains refrigerant CO2, compressor, condenser, throttle valve, gas-liquid separator, high pressure flow adjusting valve, adjustable nozzle, sublimator, temperature sensor whose signal controlling adjustable nozzle. Said invention realizes the solid refrigerant transmission in the system, reduces refrigerated temperature, in favor of raises system performance and has fine environment protection.

Description

technical field [0001] The present invention relates to a system in the technical field of refrigeration, in particular to a CO 2 Vapor-solid particle refrigeration system. Background technique [0002] CO 2 It is a naturally occurring substance with stable properties and no damage to the environment, so it can be used as a refrigerant in compression refrigeration systems. In existing compression systems, CO 2 It flows in the refrigeration system in the form of gas, liquid or gas-liquid mixture. Due to CO 2 The temperature of the triple point is -56.8°C, below the temperature of the triple point will form solid CO 2 , that is, dry ice, so the above uses CO 2 The minimum evaporation temperature of the refrigeration system as a refrigerant must be higher than the triple point temperature of -56.8°C, generally not lower than -55°C. If lower temperatures are required, solid CO must be addressed 2 Refrigeration problem. [0003] A public literature search of the prior ar...

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Problems solved by technology

[0005] The purpose of the present invention is to target CO 2 The minimum evaporation temperature cannot be lower than the triple point, providing a CO 2 The steam-solid particle refrigeration system makes it use the carbon dioxide vapor-solid particle two-phase mixture for sublimation refrigeration, which reduces the cooling temperature and realizes the effective transportation of solid refrigerant

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