Auto-cascade vapor compression type refrigeration cycle system with evaporation subcooler

Abstract

The invention discloses an auto-cascade vapor compression type refrigeration cycle system with an evaporation subcooler. The auto-cascade vapor compression type refrigeration cycle system comprises a compressor, a condenser and a gas-liquid separator which are sequentially connected, wherein the outlet of the gas-liquid separator is divided into two channels; in one channel, a liquid outlet of a saturated refrigerant is connected with an inlet of a first throttle mechanism and an outlet of the first throttle mechanism is connected with an evaporation side inlet of an evaporative condenser; in the other channel, a gas outlet of the saturated refrigerant is connected with an condensation side inlet of the evaporative condenser, an condensation side outlet of the evaporative condenser is connected with a high temperature side inlet of the evaporation subcooler, a high temperature side outlet of the evaporation subcooler is connected with an inlet of a second throttle mechanism, an outlet of the second throttle mechanism is connected with an inlet of an evaporator, an outlet of the evaporator is connected with an evaporation side inlet of the evaporation subcooler, an evaporation side outlet of the evaporation subcooler and an evaporation side outlet of the evaporative condenser are converged, and then connected with a gas suction opening of the compressor to complete the cycle. According to the auto-cascade vapor compression type refrigeration cycle system disclosed by the invention, the evaporation subcooler is used in the auto-cascade refrigeration cycle system, so that the performance of the auto-cascade vapor compression type refrigeration cycle system is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, and in particular relates to a self-cascading vapor compression refrigeration cycle system with an evaporative supercooler. Background technique [0002] The self-cascading refrigeration cycle system is a refrigeration system widely used in low-temperature refrigeration applications. It uses the characteristics of non-azeotropic refrigerants to achieve multi-stage automatic cascade through a single compressor to obtain lower refrigeration temperatures. Compared with the cascade refrigeration cycle system, it has the advantages of lower cost, simple structure and convenient maintenance, so it has been applied more and more. In the conventional self-cascading refrigeration cycle system, due to the temperature glide characteristics of the non-azeotropic refrigerant, the evaporator will have a large temperature glide, and the dryness of the refrigerant will gradually increase as the evaporation...

AI Technical Summary

Problems solved by technology

Moreover, the energy efficiency of the self-cascading refrigeration cycle system is often relatively low. Today, when energy conservation and emission reduction have become the mainstream of social development, how to improve the energy efficiency of the self-cascading refrigeration cycle system has become an important development direction.

Images