Assistant water cooling refrigerating system with vertical countercurrent direct contact condensation heat exchanger

Abstract

The invention discloses an assistant water cooling refrigerating system with a vertical countercurrent direct contact condensation heat exchanger. The assistant water cooling refrigerating system comprises a refrigeration compressor, an oil separator, an assistant water cooling heat exchanger, a first solenoid valve, a second solenoid valve, a third solenoid valve, a vertical countercurrent direct contact condensation heat exchanger, a fourth solenoid valve, a throttling valve, a liquid pump, an evaporator, a shell, liquid baffle plates and nozzles, wherein the vertical countercurrent direct contact condensation heat exchanger consists of the shell, the liquid baffle plates and the nozzles; the inlets of the nozzles are connected with a liquid supply tube and are uniformly distributed at the upper part of the shell; outlets of the nozzles face downwards; the liquid baffle plates are welded inside the shell at equal intervals; the outlet of the refrigeration compressor is divided into two paths through the oil separator; one path is connected with a shell inlet of the assistant water cooling heat exchanger through the first solenoid valve; the other path is connected with a gas inlet of the vertical countercurrent direct contact condensation heat exchanger through the third solenoid valve. By adopting the assistant water cooling refrigerating system, the exhaust temperature of the refrigeration compressor can be effectively reduced, the pressure ratio can be reduced, the refrigeration capacity of the refrigeration system can be increased, the performance of the refrigeration system can be improved, the structure is simple, the operation is convenient, the environment can be protected, and the energy can be saved.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an auxiliary water-cooled refrigeration system with a vertical countercurrent direct contact condensation heat exchanger. Background technique [0002] In the field of food refrigeration and building environment air conditioning applications, at present, the high-temperature and high-pressure gas discharged from the refrigeration compressor in the conventional water-cooled condensing refrigeration system is taken away by the water cooling medium to cool down and condense into a high-temperature and high-pressure liquid. The heat transfer needs to go through the convective heat exchange of the fluid on both sides and the heat conduction of the heat transfer wall of the heat exchanger, especially the heat transfer wall itself of the heat exchanger and the lubricating oil and dirt accumulated on the wall form a heat transfer resistance, resulting in the condensation of the heat...

AI Technical Summary

Problems solved by technology

[0002] In the field of food refrigeration and building environment air conditioning applications, at present, the high-temperature and high-pressure gas discharged from the refrigeration compressor in the conventional water-cooled condensing refrigeration system is taken away by the water cooling medium to cool down and condense into a high-temperature and high-pressure liquid. The heat transfer needs to go through the convective heat exchange of the fluid on both sides and the heat conduction of the heat transfer wall of the heat exchanger, especially the heat transfer wall itself of the heat exchanger and the lubricating oil and dirt accumulated on the wall form a heat transfer resistance, resulting in the condensation of the heat exchanger. The thermal resistance increases, the heat transfer coefficient decreases, and a large heat transfer temperature difference between the refrigerant and the cooling medium is required to dissipate heat, resulting in an increase in the exhaust temperature of the refrigeration compressor, an increase in the pressure ratio, and a decrease in volumetric efficiency. The power consumption increases, and the coefficient of performance of the refrigeration system decreases. Therefore, a condensation heat exchanger directly in contact with condensation is developed to reduce the exhaust temperature of the refrigeration compressor, reduce the pressure ratio, increase the volumetric efficiency, reduce the power consumption of the refrigeration compressor, and improve Refrigeration system performance, energy saving and environmental protection

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