Refrigerating machine room energy-saving control system and method based on water pump frequency modulation

Through the combination of intelligent remote control system and water pump characteristic curve, real-time and accurate linkage between water pump frequency regulation and central air conditioner terminal load rate is achieved, which solves the problem of insufficient linkage between water pump frequency regulation and load rate in the existing technology, and discharges residual liquid of centrifugal pump through gas pumps to protect equipment, achieving significant energy saving effects and improved operating efficiency.

CN119665424AActive Publication Date: 2025-03-21ENNAIJIE (GUANGDONG) MECHANICAL & ELECTRICAL ENGINEERING CO LTD
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Patent Information

Application Number
CN202411782194.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-03-21
Estimated Expiration
2044-12-05

AI Technical Summary

Technical Problem

In the prior art, the frequency regulation of the water pump and the end load rate of the central air conditioner cannot be accurately linked in real time, resulting in limitations in energy efficiency optimization, and the water cannot be completely drained when the centrifugal pump is shut down, affecting the equipment performance and life.

Method used

Through an intelligent remote control system, the load rate of the central air conditioner is monitored, the flow rate of cooling water and refrigerated water is calculated, and the required water pump frequency is obtained through the matching of the water pump characteristic curve, so as to realize the real-time and accurate linkage between the water pump frequency regulation and the load rate of the central air conditioner at the end. In addition, compressed air is introduced when the centrifugal pump is shut down by using a gas pump, and the residual liquid in the pump is effectively discharged by using the air pressure difference.

Benefits of technology

The water pump operation frequency is closely matched with the actual load requirements of central air conditioners, maximize the utilization of energy, reduce the energy consumption of water pumps, improve economic benefits, and thoroughly empty the residual liquid in the pump, protect the equipment, extend the service life, significantly improve the overall operating efficiency and achieve energy-saving effects.

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Abstract

The invention discloses a refrigerating machine room energy-saving control system and method based on water pump frequency modulation, and particularly relates to the technical field of industrial water pump frequency conversion. The system comprises a cooling tower, a cooling water pump, a refrigerating unit, a chilled water pump, a central air conditioner terminal and an intelligent remote control system; the cooling water pump is connected with the cooling water pipeline; the refrigerating unit is connected with the central air conditioner tail end through a chilled water pipeline, the chilled water pump is connected with the chilled water pipeline, and a cooling water pipeline flowmeter and a chilled water pipeline flowmeter are arranged on the cooling water pipeline and the chilled water pipeline respectively. And the chilled water pipeline flowmeter, the cooling water pipeline flowmeter, the cooling water pump, the chilled water pump and the central air-conditioning terminal are all connected with the intelligent remote control system. The invention can effectively avoid meaningless loss of energy, reduce the power consumption of the water pump, realize a remarkable energy-saving effect and improve the overall operation efficiency.
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