Investigation and improvement on the performance under high fluid resistance of cross flow fan in wall-mounted air conditioner indoor unit
CHENG Mengzhen
YANG Yu
LIU Yu
ZHU Yushuang
WANG Weige
Abstract：Under complex operating conditions,the stability of the air flow of the cross-flow duct directly influences the operational efficiency of wall-mounted air conditioners and the comfort for users.To investigate these influences,the flow field under different inlet resistance conditions were analyzed using numerical simulations.It was found that excessive resistance leads to eccentric vortex disturbances in the cross-flow duct,resulting in periodic backflow and fluctuating noise.Based on the mechanism,a gradually varying volute tongue was employed.In addition,the optimal radius and length of the volute tongue were determined experimentally,which finally enhances the fluid resistance performance of the duct of cross flow fan.
Keywords：Wall-mounted air conditionerCross flow fan ductHigh fluid resistanceStructure of volute throat
Publication Date：2025-12-09
Online Publishing Date：2026-01-06(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )