Refrigeration unit, air conditioner, and valve control method

By introducing an alternating static cooling structure of subcoolers and heat exchangers into the refrigeration unit, combined with automated valve control, the problem of limited energy efficiency improvement in the refrigeration process was solved, resulting in a significant improvement in energy efficiency and an increase in cooling capacity.

CN119802745BActive Publication Date: 2025-12-05NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD +2
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Patent Information

Application Number
CN202411904733.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-12-05
Estimated Expiration
2044-12-23

AI Technical Summary

Technical Problem

The energy efficiency improvement of refrigerants in existing refrigeration processes is limited. Traditional multi-stage compression refrigeration cycles with flash vapor require additional throttling devices, resulting in a loss of cooling capacity. Furthermore, energy-saving solutions for building air conditioning systems are costly and have only a small improvement in energy efficiency.

Method used

The refrigeration unit adopts a structure that includes at least two subcoolers, heat exchangers, and chillers. By alternately placing the refrigerant at rest and using the chiller for heat exchange and cooling, the refrigerant avoids the cancellation of heat and cold in the evaporator. Combined with pressure and temperature sensor monitoring, it achieves automated valve control.

Benefits of technology

It significantly reduces compressor power consumption, increases cooling capacity, and improves system energy efficiency, with an energy efficiency improvement of approximately 5%.

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Abstract

The application discloses a refrigerating unit, an air conditioner and a valve control method, and relates to the technical field of refrigeration. The refrigerating unit comprises a compressor, a condenser, a supercooling assembly and an evaporator. In the technical scheme, the refrigerants in the two supercooling devices are alternately static, the refrigerant in one supercooling device is static and then gas-liquid separation is performed, the flash vapor after separation is compressed by the compressor, the liquid part flows into the evaporator to absorb heat and refrigerate, and the refrigerant in the other supercooling device is static. The refrigerant in the static state is cooled by changing the evaporation temperature of the heat exchanger, and then gas-liquid separation is performed. The refrigerant flowing into the evaporator is deeply cooled by alternating static cooling, the refrigerant in the evaporator is prevented from being cooled and heated at the same time, the refrigerating capacity of the heat exchanger is improved, and the system energy efficiency is improved.
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