An integrated three-chamber expansion tank

CN224335454UActive Publication Date: 2026-06-09SHAANXI HEAVY DUTY AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHAANXI HEAVY DUTY AUTOMOBILE CO LTD
Filing Date
2025-05-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The single-loop cooling system of traditional fuel vehicles cannot meet the complex thermal management needs of new energy vehicles, resulting in a large number of expansion tanks, a loose layout, inconvenient daily inspection and refilling, and the risk of system backflow.

Method used

An integrated three-chamber expansion tank is designed, which divides the tank into a liquid storage chamber and an isolation chamber by a partition. A buffer partition and a metal protective bushing are installed, and a pressure valve and an exhaust pipe are integrated to achieve a compact layout and convenient filling of a multi-loop cooling system.

Benefits of technology

The number of expansion tanks has been reduced, improving the compactness of the vehicle layout and the convenience of daily inspections. This also reduces the risk of system backflow, ensures that the cooling system operates within the appropriate pressure range, and avoids pipe damage and leaks.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to an integrated three-chamber expansion tank, including a tank assembly. The tank assembly has a front shell and a rear shell, and several partitions are provided between the front shell and the rear shell. The partitions are respectively connected to the front shell and the rear shell to form several sealed cavities. The several sealed cavities include several liquid storage cavities and isolation cavities. The inner walls of the venting pipe and the water supply pipe are provided with metal protective bushings to ensure the roundness of the pipe openings and enhance rigidity. The mounting lugs are pre-embedded with metal protective bushings to improve installation reliability. This utility model can be applied to pure electric and fuel cell vehicles, which can reduce the number of expansion tanks, simplify the overall vehicle layout, reduce the risk of system backflow, and improve the convenience of daily inspection and coolant filling.
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