Method and apparatus for a hard disk drive providing dual heat transfers for an internal thermal zone

Abstract

A hard disk drive (HDD) controlling the temperature of an internal thermal zone. The HDD preferably includes a thermal controller directing a thermoelectric device based upon a temperature measure of internal thermal zone. The thermoelectric device thermal-couples via thermal interface to internal thermal zone and to air exterior to HDD, providing a first heat transfer to remove heat from the internal thermal zone and providing a second heat transfer to add heat to the internal thermal zone. The thermal controller directs the thermoelectric device to provide the first heat transfer, when the temperature measure is above a top operating temperature, and directs the thermoelectric device to provide the second heat transfer, when the temperature measure is below a bottom operating temperature. A system may include at least one HDD and may be a RAID, server computer, desktop computer, and notebook computer. Manufacturing HDD and HDD as manufacturing product.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 to 3 shows the hard disk drive moving heat into and out of its internal thermal zone;

FIG. 4 shows some of the various aspects of the internal thermal zone of FIGS. 1 to 3;

FIGS. 5 to 8C show various aspects of the external cover with the intermediate thermal transfer interface of FIGS. 1 to 3 with regards to the hard disk drive;

FIGS. 9A, 11A and 11E show details of the external cover and/or the thermoelectric device of the previous Figures including a thermal controller;

FIGS. 9B to 10A show various aspects of the thermal controller;

FIGS. 10B, 10C, 11B, 11C, 11D, and 12A to 12F show flowcharts discussing some of the operational aspects of the external cover;

FIGS. 13A to 131 show various aspects of systems using the hard disk drives of the invention; and

FIGS. 14A and 14B show some alternative embodiments of the semiconductor device of the previous Figures;

FIGS. 15A to 17A show further aspects of the thermal controller; and

FIG. 17B show a further aspect of systems using the hard disk drives of the invention.

Claims

1. A hard disk drive controlling the temperature of an internal thermal zone within said hard disk drive, comprising: a thermoelectric device thermal coupling via a thermal interface to said internal thermal zone and to air in the exterior of said hard disk drive, providing a first heat transfer to remove heat from said internal thermal zone and providing a second heat transfer to add heat to said internal thermal zone; anda thermal controller directing said thermoelectric device based upon a temperature measure of said internal thermal zone;wherein said thermal controller directs said thermoelectric device to provide said first heat transfer removing heat from said internal thermal zone, when said temperature measure is above a top operating temperature; andwherein said thermal controller directs said thermoelectric device to provide said second heat transfer adding heat to said internal thermal zone, when said temperature measure is below a bottom operating temperature.

2. The hard disk drive of claim 1, wherein said thermoelectric device includes an electrical contact pair; and wherein said thermal controller, comprises:means for applying a first potential difference between said electrical contact pair to enable said first heat transfer from said internal heat transfer interface included in said thermal interface to an exterior heat transfer interface thermally coupling to the exterior of said hard disk drive; wherein said thermal interface is thermally coupled to said internal thermal zone; andmeans for applying a second potential difference between said electrical contact pair to enable a second heat transfer from said exterior heat transfer interface to said internal heat transfer interface;wherein the sign of said first potential difference is the opposite of the sign of said second potential difference.

3. The hard disk drive of claim 2, wherein the means for applying said first potential difference, comprises:means for forcing a driving signal toward said first potential difference between said electrical contact pair; andwherein the means for applying said second potential difference, comprises:means for forcing said driving signal toward said second potential difference between said electrical contact pair.

4. The hard disk drive of claim 3, wherein the means for applying said first potential difference, further comprises:means for pulse-width-modulating said driving signal toward said first potential difference between said electrical contact pair; andwherein the means for applying said second potential difference, further comprises:means for pulse-width-modulating said driving signal toward said second potential difference between said electrical contact pair.

5. The hard disk drive of claim 2, wherein the means for applying said first potential difference, comprises: first means for forcing said driving signal toward said first potential difference between said electrical contact pair, when said temperature measure is above a top operating temperature; andwherein the means for applying said second potential difference, comprises:second means for forcing said driving signal toward said second potential difference between said electrical contact pair, when said temperature measure is below a lower operating temperature.

6. The hard disk drive of claim 2, wherein said thermal controller comprises at least one member of the group consisting of: at least one finite state machine generating a digital version of said driving signal;at least one computer generating a second digital version of said driving signal;a neural network generating a third digital version of said driving signal;wherein said computer is accessibly coupled to a memory and directed by a program system including at least one program step residing in said memory;wherein said computer includes at least one instruction processor and at least one data processor; wherein for each of said data processors, said data processor is directed by at least one of said instruction processors.

7. The hard disk drive of claim 6, wherein said finite state machine, further comprises: said finite state machine generating said digital version of said driving signal based upon a temperature measure of said internal thermal zone;wherein said computer, further comprises: said computer generating said second of said digital versions of said driving signal based upon said temperature measure; andwherein said neural network, further comprises: said neural network generating said third of said digital versions of said driving signal based upon said temperature measure.

8. The hard disk drive of claim 6, wherein said program system includes at least one of the program steps: forcing said second digital version of said driving signal toward said first potential difference; andforcing said second digital version of said driving signal toward said second potential difference.

9. The hard disk drive of claim 8, wherein the program step forcing said second digital version of said driving signal toward said first potential difference, further comprises the program step:pulse-width-modulating said second digital version of said driving signal toward said first potential difference; andwherein the program step forcing said second digital version of said driving signal toward said second potential difference, further comprises the program step:pulse-width-modulating said second digital version of said driving signal toward said second potential difference.

10. The hard disk drive of claim 7, wherein said thermal controller further comprises: an analog circuit receiving at least one member of the analog input group to create said driving signal;wherein said analog input group, consists of: said temperature measure, said digital version of said driving signal, said second digital version of said driving signal, and said third digital version of said driving signal.

11. The hard disk drive of claim 3, wherein said thermal controller further comprises: an analog circuit receiving a temperature measure to create said driving signal, comprising:means for forcing said driving signal toward said first potential difference between said electrical contact pair, when said temperature measure is above said top operating temperature; andmeans for forcing said driving signal toward said second potential difference between said electrical contact pair, when said temperature measure is below said lower operating temperature.

12. The hard disk drive of claim 11, wherein said analog circuit, further comprises at least one instance of the group consisting of: a Digital to Analog Converter (DAC);an amplifier; anda voltage switcher.

13. A method of manufacturing said hard disk drive of claim 2, comprising the steps: providing said thermal controller electrically coupled via the electrical contact pair to direct said thermoelectric device based upon said temperature measure to create said hard disk drive.

14. The hard disk drive as a product of the process of claim 13.

15. The hard disk drive of claim 2, wherein said thermoelectric device, comprises: said internal heat transfer interface;said exterior heat transfer interface; andmeans for enabling power from said electrical contact pair for said first thermal transfer and for said second thermal transfer.

16. The hard disk drive of claim 2, comprising: said thermal controller providing a driving signal to said electrical contact pair to direct said thermoelectric device in said first heat transfer and in said second heat transfer.

17. The hard disk drive of claim 1, further comprising: an embedded circuit board including said thermal controller.

18. An external cover for said hard disk drive of claim 1, comprising: said thermal controller directing said thermoelectric device in said first heat transfer and in said second heat transfer.

19. The external cover of claim 18, wherein said external cover is a member of the group consisting of a disk cover and a disk base.

20. A system, comprising: at least one of said hard disk drives of claim 1.

21. The system of claim 20, further comprising: a thermal conduit thermal-coupling to said exterior of said hard disk drive.

22. The system of claim 20, wherein said system acts as at least one of a Redundant Array of Inexpensive Disks (RAID), a server computer, a desktop computer, and a notebook computer.