CLAMSHELL ENCLOSURE FOR ELECTRONIC CIRCUIT ASSEMBLIES

• US 20080174960A1
• Filed: 01/17/2008
• Published: 07/24/2008
• Est. Priority Date: 01/22/2007
• Status: Abandoned Application

• Current Assignee: Computer Themis
• Original Assignee: Computer Themis
• Inventors: Smith, Dennis H., Kehret, William E.
• Application Number:
  US12/016,091
• Publication Number:
  US 20080174960A1
• Time in Patent Office: Days
• US Class Current: 361/696
• CPC Class Codes: H05K 7/20563 within sub-racks for removing heat from electronic boards

Abstract

A clamshell enclosure is disclosed for providing thermal and kinetic management for an enclosed electronic circuit. The clamshell enclosure comprises a sealed clamshell casing containing the circuit, and a cover that in combination with a wall of the clamshell casing forms a duct. A heat exchanger conducts heat from the electronic circuit inside the clamshell casing to a thermal interface element located within the duct, and a thermally conductive gas moving through the duct comes into contact with the interface element, dispelling the heat and thereby cooling the enclosed electronic circuit. A cellular topology of the clamshell casing and of the cover provides stiffness to the enclosure and reduces the effects of shock and vibration on the enclosed electronic circuit.

Claims

1. An electronics enclosure for housing an electronic circuit, comprising:

a casing enclosing the electronic circuit, said casing substantially preventing external contaminants from coming into contact with the enclosed electronic circuit;

an enclosure cover mechanically attached to the casing;

a duct external to the casing, comprising a space between the enclosure cover and a wall of the casing; and

at least one heat exchanger, further comprising;

a thermal connector, thermally coupled to the enclosed electronic circuit, and

an interface element, thermally coupled to said thermal connector and protruding from the interior of the casing into the duct;

wherein the casing is substantially sealed, wherein a thermally conductive substance moving through the duct comes in contact with the interface element, and wherein heat from the enclosed electronic circuit is conducted by the thermal connector to the interface element.

2. The enclosure of claim 1, wherein the casing is composed of a material with conductive properties, such that the casing provides shielding against emissions and substantially reduces intrusion of electromagnetic waves.

3. The enclosure of claim 2, wherein the material is aluminum.

4. The enclosure of claim 2, wherein the material is a magnesium alloy.

5. The enclosure of claim 2, wherein the material is a composite.

6. The enclosure of claim 1, wherein the casing has a conductive surface, such that it provides shielding against emissions and substantially reduces intrusion of electromagnetic waves.

7. The enclosure of claim 1, wherein the electronic circuit includes at least one of a memory module or a processor.

8. The enclosure of claim 1, wherein the duct includes a plurality of openings.

9. The enclosure of claim 8, wherein at least one of the plurality of openings is at least one of, adjacent to, or housing an impeller device.

10. The enclosure of claim 1, wherein the interface element comprises a fin-style heatsink.

11. The enclosure of claim 1, wherein the housing includes multiple electronic circuits and wherein the casing and cover are arranged in substantially rectangular blocks, each block corresponding to one or more of said enclosed circuits.

12. The enclosure of claim 1, wherein the enclosure comprises a system connector for connecting it to power and to a larger processing system.

13. The enclosure of claim 1, wherein said thermally conductive substance is in a gaseous state.

14. The enclosure of claim 13, wherein the conductive substance is air.

15. The enclosure of claim 1, wherein the thermal connector comprises at least one of a heat spreader plate and a thermal interposer.

16. The enclosure of claim 1, wherein the casing and the cover have a cellular topology that provides additional stiffness, such that the casing, the cover, and the electronic circuit provide a rigid structure that does not substantially deform in response to shock.