Speaker with passive voice coil cooling

Details Speaker with passive voice coil cooling Speaker with passive voice coil cooling

1998-05-12

1999-08-17

Le, Huyen

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

381412, 381396, H04R 2500

Patent

active

059405228

ABSTRACT:
An audio speaker, the voice coil of which is passively cooled by using at least one of the speaker cone and spider as a bellows to draw air in and to push air out through a first vent passing through the voice coil and a second vent, connected to the first vent through an air flow path, which second vent is formed in a basket of the speaker which is formed of a material having good heat transfer properties. Air drawn into the speaker through the first vent removes heat from the voice coil and is heated thereby. This air is mixed with cooler air drawn in through the second vent which cooler air is expelled through both vents under appropriate action of the bellows. Partially cooled air expelled through the first vent further cools the voice coil and expelled through the second vent, which is also partially heated, has heat removed therefrom as it passes through the second vent formed in the basket, the relatively large area of the basket passed through by this air functioning as a heat sink. Turbulence in the vents assures air exchange at the entrances to the vents and the drawing of replacement air therein.

REFERENCES:
patent: 4590332 (1986-05-01), Delbuck
patent: 4757547 (1988-07-01), Danley
patent: 5357586 (1994-10-01), Nordschow et al.

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