초록 ▼

A compact thermosiphon assembly for dissipating heat generated by electronic components using a working fluid includes a tube having a first end and a second end and a flat cross section defining an elongated chamber is disclosed. The tube has an evaporation region for receiving heat to evaporate th

A compact thermosiphon assembly for dissipating heat generated by electronic components using a working fluid includes a tube having a first end and a second end and a flat cross section defining an elongated chamber is disclosed. The tube has an evaporation region for receiving heat to evaporate the working fluid into a vaporized working fluid within the chamber disposed between a first condensation region and a second condensation region opposite the first condensation region for condensing the vaporized working fluid back into a liquefied working fluid within the chamber. Each of the condensation regions have a first portion extending upwardly at a first angle from the evaporation region and a second portion extending upwardly at a second angle different than the first angle.

대표청구항 ▼

1. A compact thermosiphon assembly having a minimum package height and for dissipating heat generated by electronic components using a working fluid, said assembly comprising:a tube having a first end and a second end and a flat cross section defining an elongated chamber and defining a surface area

1. A compact thermosiphon assembly having a minimum package height and for dissipating heat generated by electronic components using a working fluid, said assembly comprising:a tube having a first end and a second end and a flat cross section defining an elongated chamber and defining a surface area extending between said ends; said chamber having an evaporation region for receiving heat to evaporate the working fluid into a vaporized working fluid within said chamber and a first condensation region for condensing the vaporized working fluid back into the liquefied working fluid within said chamber; a first portion of said first condensation region extending upwardly at a first angle from said evaporation region for conveying the condensed liquid back down into said evaporation region; and a second portion of said first condensation region extending upwardly at a second angle less than said first angle for maintaining said surface area throughout said condensation region and for minimizing the height of said assembly. 2. An assembly as set forth in claim 1 wherein said first angle is selected from the range of 5 degrees to 75 degrees.3. An assembly as set forth in claim 1 where said second angle is selected from the range of 3 degrees to 45 degrees.4. An assembly as set forth in claim 1 wherein said chamber is further defined as having a second condensation region opposite said first condensation region such that said evaporation region is disposed between said first condensation region and said second condensation region.5. An assembly as set forth in claim 4 further including a first portion of said second condensation region extending upwardly at said first angle from said evaporation region for conveying the condensed liquid back down into said evaporation region.6. An assembly as set forth in claim 5 further including a second portion of said second condensation region extending upwardly at said second angle different than said first angle.7. An assembly as set forth in claim 6 wherein said tube is further defined as being seamless in cross-section.8. An assembly as set forth in claim 7 wherein said tube is further defined as being formed in an extrusion process.9. An assembly as set forth in claim 6 wherein said first end is further defined as being crimped to seal said chamber and prevent the working fluid from escaping from said chamber.10. An assembly as set forth in claim 9 further including a cap having an inlet for charging and venting the working fluid mounted to said second end and sealing said chamber.11. An assembly as set forth in claim 6 wherein said tube further includes an upper surface and a lower surface and has supporting webs extending from said upper surface to said lower surface for increasing the strength of said tube.12. An assembly as set forth in claim 11 further including internal fins extending from said upper surface and said lower surface for providing additional surfaces to condense the vaporized working fluid.13. An assembly as set forth in claim 11 further including internal fins extending from either one of said upper surface and said lower surface for providing additional surfaces to condense the vaporized working fluid.14. An assembly as set forth in claim 13 further including an evaporator plate supported by said tube for contacting the electronic component and for transferring heat from the electronic component to the working fluid.15. An assembly as set forth in claim 14 wherein said lower surface of said tube defines an aperture for securing said evaporator plate thereto such that said evaporator plate is exposed to the working fluid.16. An assembly as set forth in claim 14 wherein said evaporator plate further includes a plurality of evaporation fins extending into said chamber and in contact with the working fluid for improving heat dissipation from the electronic components.17. An assembly as set forth in claim 14 further including a plurality of external upper fins engaging said upper surface of said tube for dissipating heat from said chamber.18. An assembly as set forth in claim 17 wherein said plurality of external upper fins are further defined as engaging each of said first condensation region, said second condensation region, and said evaporation region.19. An assembly as set forth in claim 18 further including a plurality of external lower fins engaging said lower surface of said tube for dissipating heat from said chamber.20. An assembly as set forth in claim 19 wherein said plurality of external lower fins are further defined as engaging said first condensation region and said second condensation region.21. An assembly as set forth in claim 20 further including a housing surrounding said external upper fins and said external lower fins for increasing the strength of said assembly.22. An assembly as set forth in claim 1 having a package height of about 1.75 inches or less.