Cooler for vehicle-mounted transformer, and railway vehicle

By designing cooling pipe units with gradually increasing inner diameters and cooling pipe spacing with balanced airflow in the cooler, the problem of uneven coolant distribution is solved, improving cooling efficiency and heat dissipation, while reducing noise and maintenance costs.

WO2026107901A1PCT designated stage Publication Date: 2026-05-28CRRC ZHUZHOU MOTOR CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
CRRC ZHUZHOU MOTOR CO LTD
Filing Date
2024-12-13
Publication Date
2026-05-28

AI Technical Summary

Technical Problem

In the coolers of existing rail transit vehicle traction transformers, because the innermost and outermost cooling pipes in the same cooling pipe unit have the same inner diameter, the amount of coolant passing through the cooling pipes closer to the outer edge is significantly less than that of the cooling pipes closer to the outer edge, which affects the cooling efficiency.

Method used

Design a cooler in which the inner diameter of the cooling pipes in the cooling pipe unit increases sequentially from the inside to the outside, and the spacing and outer diameter of the cooling pipe units alternately increase and decrease according to a certain rule in the direction of vehicle travel, so as to balance the distribution of coolant and airflow contact.

Benefits of technology

It achieves a balanced distribution of coolant in the cooling pipe unit, improving cooling efficiency and heat dissipation, reducing noise and maintenance costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN2024139055_28052026_PF_FP_ABST
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Abstract

A cooler for a vehicle-mounted transformer and a railway vehicle comprising the cooler. A housing of the cooler (10) is connected to at least one cooling pipe unit; each cooling pipe unit comprises at least two cooling pipes (101) arranged in sequence from inside to outside, and in each cooling pipe unit, the cooling pipe (101) located on the outer side is wound outside the adjacent cooling pipe (101) located on the inner side; for the cooling pipes (101) in the at least one cooling pipe unit, the inner diameter of the cooling pipes increases in sequence from inside to outside; and at least part of the cooling pipes (101) is located outside the housing of the cooler (10). The cooler cools a traction transformer by means of running wind of the traction transformer and the surrounding thereof when the vehicle is in operation; the present application involves a high utilization rate for running wind, high heat dissipation efficiency, low noise, easy maintenance and low maintenance cost, and is particularly suitable for transformers mounted under vehicles where the flow field and wind velocity distribution are complex.
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Citation Information

Patent Citations

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    CN219843029U

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    JP2004363253A

  • transformer

    US20120013427A1

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    US20170318709A1

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    WO2017068873A1