Device for removing heat from a power connector

• US 7,158,379 B2
• Filed: 12/12/2003
• Issued: 01/02/2007
• Est. Priority Date: 12/12/2003
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Lavoie, Martin D., Sanders, David K.
• Primary Examiner(s): Datskovsky; Michael
• Assistant Examiner(s): HOFFBERG, ROBERT JOSEPH
• Application Number:
  US10/734,715
• Publication Number:
  US 20050128707A1
• Time in Patent Office: 1,117 Days
• Field of Search: 361719-721, 361/687, 361/694, 361/695, 361/690, 361/697, 361/703, 439485-487, 439/196, 439/541.5, 439 79- 80, 439/206, 439/947, 454/184
• US Class Current: 361/703
• CPC Class Codes: H05K 7/20154 Heat dissipaters coupled to components
• CPC Class Codes: Y10S 439/947 PCB mounted connector with ground terminal

Abstract

A heat removal device includes a shroud on a top side of a printed circuit board that contains a power connector. An air intake vent is located underneath the printed circuit board and directs air up through printed circuit board vias into the shroud. Openings are located in a power connector housings that allow air to flow over conductors in the connector and out an air outtake vent. The conductors include heat sink fins that extend out of the openings in the connector housing.

Claims

1. A connector having a connecting face, comprising:

conductors connectable through the connecting face;

a housing substantially enclosing the conductors and including first, second and third sides, the first side coinciding with the connecting face, the second and third sides including openings on opposite sides of the housing that together form a passageway extending completely through the connector from the second side to the third side for promoting air flow across the conductors and through the housing; and

an air flow control device configured to direct air through holes in a circuit board and into one of the housing openings.

2. A connector according to claim 1 wherein the air flows over a majority of a surface area of the conductors.

3. A connector according to claim 1 wherein the housing is attached over the circuit board.

4. A connector according to claim 1 wherein the air flow control device includes an air intake vent configured to direct air from underneath the circuit board up through vias electrically connected to the circuit board and into one of the housing openings.

5. A connector according to claim 4 including conductor pins that are inserted in some of the vias, wherein the air flow is directed through at least some of the vias not including conductor pins inserted therein.

6. A connector according to claim 1 wherein the air flow control device includes an air intake vent located below the housing and below the circuit board.

7. A connector according to claim 6 including an exhaust vent configured to vent air in a direction offset and substantially parallel to the air directed towards the intake vent, wherein the intake and exhaust vents are located in a shroud substantially enclosing the housing.

8. A connector according to claim 1 including vias electrically connected to a power plane on the circuit board, the vias located inside the air flow control device for directing air from underneath the circuit board up through the vias and across the conductors in the connector.

9. A connector according to claim 1 including parallel airways formed between the conductors for channeling the air flow in a direction substantially perpendicular to the holes in the circuit board.

10. A connector according to claim 9 wherein at least some of the holes are electrically connected to the circuit board.

11. A connector according to claim 9 wherein the airways expose a majority of a surface area of the conductors.

12. The connector according to claim 1 wherein the conductors are arranged as vertically stacked blades spaced apart by horizontal channels extending from the second side of the housing to the third side of the housing, the openings allowing air to pass in through the opening on the second side of the housing, through the horizontal channels over a majority of a surface area of the vertically stacked conductor blades, and pass out the opening in the third side of the housing.

13. A heat removal system, comprising:

a circuit board power connector including electrical contacts for inserting into a first set of contact holes electrically connected to a circuit board; and

a device attached over the circuit board power connector for directing air from underneath the circuit board up through a second set of contact holes, through the power connector and out an output vent for directing heat away from the power connector.

14. A heat removal system according to claim 13 including an air intake vent located on an underside of the printed circuit board for directing air up through the second set of contact holes in the printed circuit board.

15. A heat removal system according to claim 13 including openings in a power connector, the device directing the air into a first one of the openings, through parallel passageways formed between upper and lower surfaces of conductors housed in the connector, out a second one of the openings, and out the output vent.

16. A heat removal system according to claim 15 wherein the air directed out the output vent is substantially parallel to the air directed through the conductors.

17. A heat removal system according to claim 13 wherein the air directed out the output vent is substantially perpendicular to the air directed through the second set of contact holes.

18. A heat removal system, comprising:

a device attached over a circuit board power connector and including an output vent for directing heat away from the power connector;

an air intake vent located on an underside of the printed circuit board for directing air up through holes in the printed circuit board and into the device; and

a hinge that couples the device with the air intake vent.

19. An air flow control device for cooling a circuit board power connector, comprising:

a unit for containing a circuit board power connector;

an air intake vent for directing air into the unit;

an air outtake vent for directing the air out of the unit; and

conductors arranged to direct the air through the power connector in channels exposing a majority of a surface area of the conductors.

20. An air flow control device according to claim 19 wherein the air intake vent is located on a side of the unit opposite that of the air outtake vent.

21. An air flow control device according to claim 20 wherein the air intake vent is located below the conductors.

22. An air flow control device according to claim 19 including conductor connections for inserting into vias electrically coupled to a circuit board power plane wherein vias not including conductor connections inserted therein provide air flow into the unit.

23. A connector, comprising:

conductors;

a housing containing the conductors; and

an air flow control device substantially enclosing the housing including an air intake vent on one side for promoting air flow through a circuit board into the housing and across parallel passageways exposing upper and lower surfaces of the conductors.

24. A connector according to claim 23 including an exhaust vent located on another side of the air flow control device for exhausting the air flow in a direction parallel to the passageways.

25. A connector according to claim 24 wherein the passageways are formed from upper and lower surfaces of the conductors.

26. A connector according to claim 23 including vias connected to the circuit board, wherein conductor contact points are inserted in some of the vias and wherein other vias allow air flow through the circuit board.

28. A method according to claim 26 including exhausting the air in a direction substantially parallel to the air circulated through the conductors.

29. A method according to claim 28 wherein the air circulated through the conductors is substantially perpendicular to the air flow directed through the contact holes.

27. A method for removing heat, comprising:

directing an air flow from beneath a circuit board through a first set of electrically coupled contact holes located in the circuit board;

circulating the air past electrical contacts of conductors inserted in a second set of electrically coupled contact holes located in the circuit board; and

directing the air into a housing and through multiple passageways of the conductors.

30. A method according to claim 27 including circulating the air through parallel planar passageways formed between the conductors located in the housing.