A thermal management system, excavator and control method thereof

The integrated thermal management system enables the diesel engine and electric motor systems in dual-power excavators to share a common water cooling system, solving the problems of insufficient space and high cost for cooling system layout, improving system utilization and reducing failure rate.

CN117513471BActive Publication Date: 2026-03-31SANY HEAVY MACHINERY
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Patent Information

Application Number
CN202311583688.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-24
Publication Date
2026-03-31
Estimated Expiration
2043-11-24

AI Technical Summary

Technical Problem

Traditional dual-power excavators suffer from problems such as insufficient space for cooling systems, high cost, low utilization rate, high failure rate, and complicated assembly and maintenance, and cannot simultaneously meet the different cooling needs of the diesel engine and electric motor systems.

Method used

An integrated thermal management system is adopted, including a cooling flow path, radiator, diesel engine, electrical components to be cooled, and switching device. Multiple cooling modes are realized through the switching device, and a common water cooling system is used to cool the diesel engine and motor system separately.

Benefits of technology

The simplified cooling system structure reduces costs, increases utilization, decreases failure rate, and simplifies assembly and maintenance, meeting the cooling requirements of dual-power systems.

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Abstract

The application discloses a heat management system, an excavator and a control method thereof. The heat management system is formed with a cooling flow path, and the cooling flow path comprises a first main path, a first cooling branch path, a second cooling branch path and a short-circuit branch path. The heat management system comprises a radiator, a diesel engine, an electric device to be cooled and a switching device. The radiator is arranged on the first main path. The diesel engine is arranged on the first cooling branch path. The electric device to be cooled is arranged on the second cooling branch path. The switching device is used to switch the communication between the two ends of the first main path and the two ends of the first cooling branch path or the two ends of the second cooling branch path, or to switch the communication between the two ends of the short-circuit branch path and the two ends of the second cooling branch path and form a self-circulation flow path, so that the heat management system has multiple cooling modes. Therefore, a set of water cooling systems can be used regardless of traditional diesel power or pure electric power.
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