Water chilling unit provided with super-cooler and lubricating oil cooler

Abstract

The invention discloses a water chilling unit provided with a super-cooler and a lubricating oil cooler. A main loop of the water chilling unit is sequentially connected with a compressor module, an oil separator, a condenser, the super-cooler, a liquid storing machine, a thermal expansion valve, an evaporator, an air and liquid separator and the like. A first bypass and a second bypass are correspondingly arranged in parallel between the outlet of the liquid storing machine and the outlet of the evaporator; super-cooling of condensate of a refrigerant and cooling of lubricating oil are realized; the evaporation temperature of the water chilling unit and the oil supply temperature of a compressor are precisely controlled; the lubrication performance of the compressor of key equipment is improved; and the environmental suitability and reliability of the water chilling unit are improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration and heating, ventilating and air conditioning, and more specifically relates to a water chiller equipped with a subcooler and a lubricating oil cooler. Background technique [0002] With the improvement of industrial level and people's life, the demand for high-power industrial and commercial chillers is strong. During the use of related equipment, due to frequent changes in load and application environment, the oil supply temperature of the compressor's lubricating oil cannot be guaranteed. It is easy to cause poor lubrication or overheating of the compressor, which seriously affects the performance and reliability of the equipment; some industrial cooling and air-conditioning projects require more accurate cooling capacity and chilled water temperature, and controlling the condensing temperature of the compressor and the liquid supply temperature of the expansion valve is very important to ...

AI Technical Summary

Problems solved by technology

However, the method of increasing the heat exchange area of ​​the condenser takes up a lot of space, the economy is not good, and it is impossible to accurately control the degree of subcooling

[0004] For high-power units, it is necessary to cool the lubricating oil to prevent the temperature of the lubricating oil from being too high and the viscosity to drop, resulting in poor lubrication of the compressor

[0005] The Chinese invention with the publication number CN104236147A discloses a water chiller, but it cannot guarantee the subcooling of the liquid before the expansion valve, which may easily lead to abnormal operation of the expansion valve; at the same time, if the compressor is not well lubricated, it may cause Excessive compressor wear affects the performance and service life of the compressor

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