Loudspeaker system cooling

Patent metadata

Field	Value
Publication number	US-11178797-B2
Application number	US-201916669682-A
Country	US
Kind code	B2
Filing date	Oct 31, 2019
Priority date	Oct 31, 2019
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

A loudspeaker system includes a line array assembly and a base for supporting the line array assembly. The line array assembly includes a plurality of electro-acoustic transducers arranged along a vertical axis and the base houses electronics for powering the line array assembly. The base and the line array assembly together define a flow path to facilitate a convective air flow to pass between the base and the line array assembly for cooling the electronics.

First claim

What is claimed is:

1. A loudspeaker system comprising:
a line array assembly comprising:
a plurality of electro-acoustic transducers arranged along a vertical axis; and
a base for supporting the line array assembly, the base housing electronics for powering the line array assembly,

wherein the base and the line array assembly together define a flow path to facilitate a convective air flow to pass between the base and the line array assembly for cooling the electronics, and
wherein the line array assembly comprises an array housing that defines an acoustic cavity, wherein the array housing supports the electro-acoustic transducers such that respective first radiating surfaces of the electro-acoustic transducers radiate acoustic energy outwardly from a first surface of the array housing and respective second radiating surfaces of the electro-acoustic transducers radiate acoustic energy into the acoustic cavity.

2. The loudspeaker system of claim 1 , further comprising a receptacle supported by the base for receiving a portion of the line array assembly, wherein the base, the receptacle, and the line array assembly together define a flow path to facilitate a convective air flow to pass between the base and the line array assembly for cooling the electronics.

3. The loudspeaker system of claim 2 , wherein the base comprises a base housing that defines an electronics cavity within which the electronics are enclosed,
wherein the receptacle includes one or more first apertures in fluid communication with the electronics cavity, and
wherein the line array assembly includes one or more second apertures which are placed in fluid communication with the one or more first apertures when the line array assembly is supported base.

4. The loudspeaker system of claim 3 , wherein the housing includes one or more third apertures to allow ambient air to enter the electronics cavity.

5. The loudspeaker system of claim 4 , further comprising an air mover arranged to draw a convective air flow into the electronics cavity via the one or more third apertures and to move the convective air flow across the electronics and toward the one or more first apertures.

6. The loudspeaker of claim 5 , further comprising a duct that fluidically couples the air mover to the one or more third apertures.

7. The loudspeaker system of claim 3 , wherein the line array assembly includes one or more third apertures in fluid communication with the one or more second apertures, thereby to allow the convective air flow to pass from the one or more second apertures through the line array assembly and out of the one or more third apertures.

8. The loudspeaker system of claim 2 , further comprising a heat sink thermally coupled to the receptacle and the electronics, thereby to facilitate thermal heat transfer from the electronics to the receptacle.

9. The loudspeaker system of claim 8 , wherein the heat sink formed integrally with the receptacle.

10. The loudspeaker system of claim 8 , wherein the heatsink comprises a plate extending outwardly from the receptacle and supporting the electronics.

11. The loudspeaker system of claim 10 , wherein the heatsink further comprises a fin that extends outwardly from the plate, the fin abutting a heat producing component of the electronics for dissipating thermal energy therefrom.

12. The loudspeaker system of claim 11 , further comprising a thermally conductive grease disposed between the fin and the heat producing component to provide a thermally conductive path therebetween.

13. The loudspeaker system of claim 1 , further comprising an air mover to encourage the convective air flow to move from the base into the line array assembly.

14. The loudspeaker system of claim 13 , wherein the base comprises a base housing that defines an electronics cavity within which the electronics are enclosed, and wherein the air mover is disposed within the electronics cavity.

15. The loudspeaker system of claim 14 , wherein the base housing includes one or more first apertures for allowing a convective air flow to enter the electronics cavity from a region external to the housing, and wherein the base further comprises a duct disposed within the electronics cavity and fluidically coupling the one or more first apertures to the air mover.

16. The loudspeaker system of claim 1 , wherein the array housing further defines an air flow cavity for accommodating the convective air flow, the air flow cavity being acoustically isolated from the acoustic cavity.

17. The loudspeaker of claim 16 , wherein the line array assembly includes one or more first apertures arranged along a rear surface of the housing, opposite the front surface, and in fluid communication with the air flow cavity, and one or more second apertures arranged along the front surface of the housing and in fluid communication with the air flow cavity such that the convective air flow can enter the air flow cavity via the one or more first apertures and can be exhausted from the air flow cavity via the one or more second apertures.

18. The loudspeaker system of claim 1 , wherein the array housing is a first housing and the line array assembly further comprises a second housing,
wherein the second housing defines an air flow cavity for accommodating the convective air flow, and
wherein the second housing is releasably coupled to the first housing.

19. The loudspeaker system of claim 18 , further comprising a receptacle supported by the base for receiving a portion of the line array assembly, wherein the base, the receptacle, and the line array assembly together define a flow path to facilitate a convective air flow from the base and through the line array assembly for cooling the electronics,
wherein the receptacle is configured to receive a bottom end portion of the second housing.

20. The loudspeaker system of claim 1 , further comprising an air mover arranged to encourage the convective air flow to move from the line array assembly and into the base.

21. The loudspeaker system of claim 3 , wherein the housing includes one or more third apertures to allow the convective air flow to be exhausted from the electronics cavity.

22. The loudspeaker system of claim 3 , wherein the line array assembly includes one or more third apertures in fluid communication with the one or more second apertures, thereby to allow the convective air flow to pass from the one or more third apertures through the line array assembly and out of the one or more second apertures.

23. The loudspeaker system of claim 22 , further comprising an air mover arranged to draw a convective air flow into the line array assembly via the one or more third apertures and to move the convective air flow into the electronics cavity via the first and second apertures.

Assignees

• Bose Corp

Inventors

• Santoro Peter C
• Macdonald Thomas E

Classifications

• H04R1/403

  loud-speakers · CPC title

• H04R2400/11

  Aspects regarding the frame of loudspeaker transducers · CPC title

• H04R2201/403

  Linear arrays of transducers · CPC title

• H04R9/022 Primary

  Cooling arrangements · CPC title

• H04R1/028

  associated with devices performing functions other than acoustics, e.g. electric candles · CPC title