Experimental Study of Noise Reduction and Improved Cooling Fan Performance in a PDP TV

Abstract

The present experimenral study addresses fan system noise reduction and improvement in cooling performance in a plasma display panel(PDP) television (TV), The broadband noisr in a PDP TV is closely related to system losses. The system losses, mainly due to rear case of the TV near the fan, are reducced by increasing the number of vent holes in the case, preventing secindary leajage flow between the fan and the case and modifying the reat case shape. The discrete noise is mainly related with the inflow conditions therefore, the removal of structures that distort inflow results in a discrete noise reduction. Additionally, the fan rotationg speed is reduced because of the increased flow rate and reduced flow fluctuaion, shich is obtained from the reduction of system loss(resistance). 7.3dB(A) noisr reduction and a 10% increase in flow rate are achieved. rhe manin concepts behind realizing noise reduction are prevention of recirculation flow around rhe fan and reduction of sysrem loss.. The author wish to acknowledge the financial wupport of LG Electronics, Inc., and useful discussions with Dr, Suk Kwan Kim at LG-PRC.