Oil cooling system, oil cooling control method, and storage medium

By designing an oil cooling system in a composite chiller unit and using refrigerated water to cool the lubricant, the problem of low cooling efficiency of lubricant is solved, effective reduction of lubricant temperature and secondary utilization of heat are achieved, and the stability and refrigeration cycle efficiency of the unit are improved.

CN119713097APending Publication Date: 2025-03-28GREE ELECTRIC APPLIANCE INC OF ZHUHAI
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Patent Information

Application Number
CN202411740342.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The low cooling efficiency of lubricant oil in the composite unit leads to an increase in the lubricant temperature and an increase in viscosity, affecting the stability and reliability of the unit, and the direct heat discharged is wasted.

Method used

An oil cooling system is designed to lead two oil cooling branches from the refrigerated water return pipe of the low-temperature stage system, and the refrigerated water is directed to the oil storage tank of the low-temperature stage and the high-temperature stage system for lubricating oil cooling, and the heat-exchanged frozen water is directed back to the water inlet of the low-temperature stage evaporator.

Benefits of technology

It effectively reduces the temperature of the lubricant, maintains the optimal viscosity state, ensures the normal operation of the oil return system of the chiller unit, improves the stability and reliability of the unit, and reuses the lubricant heat, and improves the efficiency of the low-temperature refrigeration cycle.

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Abstract

The invention discloses an oil cooling system, an oil cooling control method and a storage medium. The oil cooling system is applied to the cascade type water chilling unit, the cascade type water chilling unit comprises a low-temperature-stage system and a high-temperature-stage system, a water inlet of a low-temperature-stage evaporator is connected with a chilled water return pipeline, the low-temperature-stage system comprises a first oil storage tank, and the high-temperature-stage system comprises a second oil storage tank. The water inlet is connected between the chilled water return pipeline and the first oil storage tank and used for leading chilled water from the chilled water return pipeline to the first oil storage tank for cooling lubricating oil and then leading the chilled water subjected to heat exchange back to the low-temperature-stage evaporator; and the second oil cooling branch is connected between the chilled water return pipeline and the second oil storage tank, and is used for leading the chilled water from the chilled water return pipeline to the second oil storage tank for cooling the lubricating oil and then leading the chilled water subjected to heat exchange back to the water inlet of the low-temperature-stage evaporator. The temperature of lubricating oil is reduced, and the efficiency of low-temperature-stage refrigeration circulation is improved.
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