Electronic chassis and housing having an integrated forced air cooling system

• US 20040207981A1
• Filed: 04/15/2003
• Published: 10/21/2004
• Est. Priority Date: 04/15/2003
• Status: Active Grant

• Current Assignee: ARRIS Enterprises LLC (CommScope Holding Company, Inc.)
• Original Assignee: General Instrument Corporation (CommScope Holding Company, Inc.)
• Inventors: Ady, Roger W., Groves, William R., Gorenz, Harold J. Jr.
• Granted Patent: US 6,934,148 B2
• Time in Patent Office: Days
• US Class Current: 361/687
• CPC Class Codes: H05K 7/20727 within server blades for removing heat from heat source

Abstract

The invention provides a chassis for housing printed circuit boards comprising: a housing having a top, bottom, front, back, left and right side walls, and having a height, measured from the bottom wall to the top wall, that is equal to a 1 rack-unit. The front wall includes an inlet vent, a display module, and a jack and the back side wall includes an exhaust vent. A front wall face plate overlies the inlet vent, display module and jack, with the inlet vent arranged in parallel, overlapping but offset planes. A centrifugal blower is provided inside the chassis housing.

Claims

1. An electronic chassis and housing having an integrated force air cooling system, comprising:

a) a housing having a top, a base and front, back, left and right side walls which define an interior space having a predetermined height, as measured between the top and the base, and an inlet vent in at least one side wall and an exhaust vent in an opposed side wall;

b) a centrifugal blower assembly having defined top and bottom planes and perimeter walls, a second predetermined height measured between the top and bottom planes that is less than the predetermined height of the interior space and inlet and outlet ports defined in the perimeter walls;

the blower assembly is mounted within the interior space such that its inlet port is in fluid communication with the inlet vent and its exhaust port is in fluid communication with the exhaust vent; and

,

c) a baffle, positioned within the interior space so that it directs the flow of air from the inlet vent through a non-linear path to the blower inlet port.

2. The invention of claim 1, wherein the baffle is positioned between the housing inlet vent and said blower inlet port.

3. The invention of claim 1, wherein the baffle is comprised of foam gasket material.

4. The invention of claim 1, wherein the baffle is comprised of at least one blower assembly side wall that extends upwardly beyond the top plane and contacts the top of the housing.

5. The invention of claim 1, wherein the blower is centrally located within the interior space and includes a fan having a diameter greater than the predetermined height.

6. The invention of claim 5, wherein the inlet vent is located in one side wall of the housing, the blower inlet port is directed toward another side wall of the housing and the baffle directs air past the blower assembly before it enters the blower inlet port.

7. The invention of claim 1, wherein the inlet port is located in a blower perimeter walls and the outlet port is located in the top plane of the blower assembly.

8. The invention of claim 1 further comprising:

d) at least one interior wall dividing the interior space into first and second chambers with the centrifugal blower being in one chamber and both chambers being in fluid communication with the inlet and exhaust vents.

9. The invention of claim 8 further comprising:

e) an axial fan located in other chamber with an inlet port in fluid communication with the inlet vent and an outlet port in fluid communication with the outlet vent.

10. A chassis for housing printed circuit boards comprising:

a) a housing having a top, bottom, front, back, left and right side walls, and a height, measured from the bottom wall to the top wall, that is equal to a 1 rack-unit, said front wall including an inlet vent, a display module, and a jack; and

,

b) a face plate including a bill board surface, display module slot, and a jack slot, arranged to overlay said inlet vent, display module and jack, respectively,

wherein said bill board portion and said vent define parallel, spaced apart planes so that said vent is concealed from view, but in fluid communication with the exterior ambient atmosphere.

11. The chassis recited in claim 10, wherein said front wall includes a plurality of jack, and a pair of installation handles.

12. The chassis recited in claim 10, wherein said bill board surface includes identifying indicia thereon.

13. A face plate for a printed circuit board chassis having a top, bottom, front, back, left and right side walls, a height, measured from the bottom wall to the top wall, which is equal to a 1 rack-unit, said front wall including an inlet vent, a display module, and a jack, said face plate comprising:

a) a planar logo surface portion arranged to overlay the inlet vent in a parallel, overlapping but offset plane so that said vent is concealed from view from, but is in fluid communication with, the front exterior of said chassis;

b) a display module slot arranged to overlay the display module; and

,

c) a jack slot arranged to overlay the jack.

14. A chassis for housing printed circuit boards comprising:

a) a housing having a top, bottom, front, back, left and right side walls, and having a height, measured from the bottom wall to the top wall, that is equal to a 1 rack-unit, said front wall including an inlet vent, a display module, and a jack;

b) an exhaust vent in said back side wall;

c) a centrifugal blower inside said chassis housing, said blower having a housing with top, bottom, and side walls, an inlet port in fluid communication with said inlet vent, and an exhaust port in fluid communication with said exhaust vent, said blower housing having a height, measured from the bottom wall to the top wall, that is less than the height of said chassis housing;

d) a partition intermediate said housing inlet vent and said blower inlet port, said partition diverting the flow of air along an indirect path within the housing from said inlet vent to said blower inlet port;

e) a front wall face plate including a planar logo surface portion, display module slot, and a jack slot, arranged to overlay said inlet vent, display module and jack, respectively;

wherein said logo surface portion and said inlet vent are arranged in parallel, overlapping but offset planes so that said vent is concealed from view, but is in fluid communication with, the front exterior of said chassis.

15. The chassis recited in claim 14, including:

f) a chassis housing interior wall dividing the interior into a first chamber in which the centrifugal blower is located and second chamber, both chambers being in fluid communication with said inlet vent and said exhaust vent; and

,

g) an axial fan located in said second chamber, said axial fan having an inlet port in fluid communication with said inlet vent and an outlet port in fluid communication with said outlet vent.

16. The chassis recited in claim 14, wherein said front wall includes a plurality of jacks, and a pair of installation handles.

17. The chassis recited in claim 14, wherein said logo surface includes identifying indicia printed or embossed thereon.

18. A printed circuit board chassis for insertion in a standard communications infrastructure equipment rack, the chassis comprising:

a) a housing having a top, bottom, front, back, left and right side walls, and having a height, measured from the bottom wall to the top wall, that is equal to a 1 rack-unit of approximately 1.75 inches, said front wall including an inlet vent, a display module, and a jack;

b) an exhaust vent in said back side wall;

c) a centrifugal blower inside said chassis housing, said blower having a housing with top, bottom, and side walls, an inlet port in fluid communication with said inlet vent, and an exhaust port in fluid communication with said exhaust vent, said blower housing having a height, measured from the bottom wall to the top wall, that is less than 1.75 inches;

d) a partition intermediate said housing inlet vent and said blower inlet port, said partition diverting the flow of air along an indirect path within the housing from said inlet vent to said blower inlet port; and

e) a front wall face plate including a planar logo surface portion, display module slot, and a jack slot, arranged to overlay said inlet vent, display module and jack, respectively.

19. The chassis of claim 18 wherein said logo surface portion and said inlet vent are arranged in parallel, overlapping but offset planes so that said vent is concealed from view, but is in fluid communication with, the front exterior of said chassis.

20. The chassis of claim 18 wherein said front wall includes a pair of installation handles.