Railway vehicle air conditioning air supply and return system and railway vehicle

By adopting a return air cavity and multi-point return air inlet structure in the rail vehicle air conditioning system, combined with lightweight design and anti-condensation treatment, the problems of return air noise and uneven airflow organization have been solved, improving passenger comfort and vehicle performance.

CN122354589APending Publication Date: 2026-07-10CRRC QINGDAO SIFANG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CRRC QINGDAO SIFANG CO LTD
Filing Date
2026-04-30
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing rail vehicle air conditioning systems, return air ducts cause high airflow noise, uneven airflow organization, noise transmission into the car, uneven temperature distribution inside the car, and waste discharge devices affect the vehicle's aerodynamic performance.

Method used

The system replaces independent return air ducts with return air chambers, sets up multiple return air inlets, combines centralized passive waste discharge devices, optimizes the air supply duct layout, and uses anti-condensation treatment and lightweight materials.

Benefits of technology

It reduces return air noise, improves airflow uniformity, enhances passenger comfort, reduces aerodynamic drag, improves temperature distribution inside the carriage, and enhances system adaptability and reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of rail transit technology. It proposes a rail vehicle air conditioning supply and return air system and the rail vehicle itself. The supply air duct is fixedly connected to the top of the vehicle body and communicates with the unit's air supply outlet. The bottom of the supply air duct has a supply air grille that communicates with the interior of the vehicle body. The return air chamber is formed by a side top plate, the side wall of the supply air duct, and the vehicle body. The side top plate is fixedly connected to the inner side of the top of the vehicle body and communicates with the unit's return air outlet. A first return air outlet is located on the side top plate and communicates with both the interior space of the vehicle body and the return air wall. A second return air outlet is located at the bottom of the side wall, and a third return air outlet is located in the middle section of the side wall. The side wall return air duct is located inside the side wall and communicates with the second and third return air outlets. The upper end of the side wall return air duct communicates with the return air chamber through an opening. This invention effectively reduces return air noise and improves passenger comfort by using a return air chamber instead of an independent return air duct.
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