Multifunctional control of cooling systems for computers

• US 20060178786A1
• Filed: 02/09/2005
• Published: 08/10/2006
• Est. Priority Date: 02/09/2005
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Robertson, Naysen, Chheda, Sachin Navin, Bhagwath, Nitin
• Granted Patent: US 7,310,738 B2
• Time in Patent Office: Days
• US Class Current: 700/300
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G06F 1/206 comprising thermal management

Abstract

A fan controller in one exemplary embodiment facilitates control over a cooling system having fans in a computing apparatus, and permits operating system and application program based software inputs as well as hardware inputs to be utilized in the control of the fans.

Claims

1. A method for controlling a cooling system in a computing apparatus comprising the steps of:

receiving at a controller for the cooling system a software instruction originated by one of an operating system and an application program running on the computing apparatus;

receiving at the controller for the cooling system a hardware instruction from a hardware controller disposed in the computing apparatus;

retrieving, by the controller in response to receiving the software and hardware instructions, input information corresponding to each instruction and related to the control of the cooling system;

selecting at the controller which of the software and hardware instruction is to be used;

generating a first control signal based on the selected instruction and the corresponding input information, and transmitting the first control signal to the cooling system, the first control signal controlling an amount of cooling provided by the cooling system to the computing apparatus.

2. The method of claim 1 wherein the step of selecting further comprises the steps of:

determining at the controller which of the software and hardware instructions have corresponding input information that demands a greater amount of cooling by the cooling system;

selecting the one of the software and hardware instructions having the corresponding greater amount of cooling demand and generating a second control signal based on the one instruction and transmitting the second control signal to the cooling system, the second control signal controlling an amount of cooling provided by the cooling system to the computing apparatus.

3. The method of claim 1 further comprising the step of loading a software driver for the controller to enable communications between the controller and the one of an operating system and an application program.

4. The method of claim 3 further comprising the step of automatically generating and transmitting a default control signal to the cooling system following the loading of the software driver, the default control signal setting a default amount of cooling to be provided by the cooling system to the computing apparatus.

5. The method of claim 3 further comprising the step of periodically monitoring for a further software instruction.

6. The method of claim 1 further comprising the step of periodically monitoring for changes in the input information.

7. The method of claim 2 wherein the hardware instruction is received at the controller during a boot-up process of the computing apparatus prior to an operating system being loaded.

8. The method of claim 1 further comprising the steps of selecting a first operational mode corresponding to the software instruction from a plurality of stored predetermined operational modes, the first operational mode specifying the input information to be retrieved.

9. The method of claim 8 wherein the input information comprises at least a first value associated with a first parameter that is part of the input information.

10. The method of claim 9 further comprising the step of periodically comparing current values associated with the first parameter with said first value, and based on results of this comparison determining whether the first control signal is to be generated.

11. The method of claim 6 wherein the input information comprises a stored first value of a temperature associated with an interior of the computing apparatus, the periodically monitoring step periodically monitoring for changes of the temperature associated with the interior of the computing apparatus, the method further comprising the step of periodically comparing the temperature associated with the interior of the computing apparatus with the stored first value, and based on results of this comparison determining whether the first control signal is to be generated.

12. The method of claim 1 wherein the step of retrieving input information comprises retrieving input information related to the control of the cooling system from an information source that is remote to the computing apparatus.

13. The method of claim 1 wherein the cooling system is at least one fan disposed within the computing apparatus and the first control signal controls the revolutions per minute of the at least one fan.

14. The method of claim 8 wherein each operational mode defines a predetermined range of cooling that can be provided by the cooling system.

15. The method of claim 14 further comprising the step of periodically monitoring for changes in the input information, wherein the input information comprises a stored first value of a temperature associated with an interior of the computing apparatus, the periodically monitoring step periodically monitoring for changes of the temperature associated with the interior of the computing apparatus, the method further comprising the step of periodically comparing the temperature associated with the interior of the computing apparatus with the stored first value, and based on results of this comparison determining whether the first control signal is to be generated, the first control signal causing the cooling provided by the cooling system to be within the predetermined range.

16. The method of claim 15 further comprising the step of automatically changing from the first operational mode to another operational mode if the cooling provided by the cooling system in the first operational mode is insufficient to maintain a predetermined temperature within the computing apparatus, the another operational mode defining another predetermined range of cooling that is greater than the predetermined range of cooling associated with the first operational mode.

17. A computing apparatus comprising:

a cooling system;

a controller means for receiving a software instruction originated by one of an operating system and an application program running on the computing apparatus and for receiving a hardware instruction from a hardware controller;

said controller means retrieving input information related to the control of the cooling system in response to receiving the software and hardware instruction;

said controller means selecting which of the software and hardware instruction is to be used and generating a first control signal based on the selected instruction and the input information, and transmitting the first control signal to the cooling system, the first control signal controlling an amount of cooling provided by the cooling system.

18. The computing apparatus of claim 17 further comprising:

the controller means determining which of the software and hardware instructions have corresponding input information that demands a greater amount of cooling by the cooling system;

said controller means selecting the one of the software and hardward instructions having the corresponding greater amount of cooling demand and generating a second control signal based on the selected instruction and transmitting the second control signal to the cooling system, the second control signal controlling an amount of cooling provided by the cooling system to the computing apparatus.

19. The computing apparatus of claim 17 further comprising means for loading a software driver for the controller for the cooling system to enable communications between the controller for the cooling system and the one of an operating system and an application program, the loading means automatically generating and transmitting a default control signal following the loading of the software driver to the controller means, the default control signal setting a default amount of cooling to be provided by the cooling system to the computing apparatus.

20. The computing apparatus of claim 17 further comprising means for periodically monitoring for changes in the input information.

21. The computing apparatus of claim 18 wherein the hardware instruction is received at the controller means during a boot-up process of the computing apparatus prior to an operating system being loaded.

22. The computing apparatus of claim 17 wherein the controller means selects a first operational mode corresponding to the software instruction from a plurality of stored predetermined operational modes, the first operational mode specifying the input information to be retrieved.

23. The computing apparatus of claim 22 wherein the input information comprises at least a first value associated with a first parameter that is part of the input information.

24. The computing apparatus of claim 23 further comprising means for periodically comparing current values associated with the first parameter with said first value, and based on results of this comparison determining whether the first control signal is to be generated.

25. The computing apparatus of claim 20 wherein the input information comprises a stored first value of a temperature associated with an interior of the computing apparatus, the means for periodically monitoring periodically monitors for changes of the temperature associated with the interior of the computing apparatus, the computing apparatus further comprising means for periodically comparing the temperature associated with the interior of the computing apparatus with the stored first value, and based on results of this comparison determining whether the first control signal is to be generated.

26. The computing apparatus of claim 17 wherein the controller means retrieves input information related to the control of the cooling system from an information source remote to the computing apparatus.

27. The computing apparatus of claim 17 wherein the cooling system is at least one fan disposed within the computing apparatus and the controller means generates the first control signal that controls the amount of air cooling provided by the at least one fan to the computing apparatus.

28. The computing apparatus of claim 22 wherein each operational mode defines a predetermined range of cooling that can be provided by the cooling system.

29. The computing apparatus of claim 28 further comprising means for periodically monitoring for changes in the input information, wherein the input information comprises a stored first value of a temperature associated with an interior of the computing apparatus, the means for periodically monitoring periodically monitors for changes of the temperature associated with the interior of the computing apparatus, the computing apparatus further comprising means for periodically comparing the temperature associated with the interior of the computing apparatus with the stored first value, and based on results of this comparison determining whether the first control signal is to be generated, the first control signal causing the cooling provided by the cooling system to be within the predetermined range.

30. The computing apparatus of claim 29 wherein the controller means automatically changes from the first operational mode to another operational mode if the cooling provided by the cooling system while in the first operational mode is insufficient to maintain a predetermined temperature within the computing apparatus, where the another operational mode defines another predetermined range of cooling that is greater than the predetermined range of cooling associated with the first operational mode.

31. A computing apparatus comprising:

a cooling system including at least one fan;

a fan controller adapted to receive a software instruction originated by one of an operating system and an application program running on the computing apparatus and a hardware instruction from a hardware controller;

said fan controller retrieving input information related to the control of the at least one fan in response to receiving the software and hardware instructions;

said fan controller selecting which of the software and hardware instruction is to be used;

said fan controller generating a first control signal based on the selected instruction and the input information, and transmitting the first control signal to the at least one fan, the first control signal controlling an amount of cooling provided by the at least one fan.

32. The computing apparatus of claim 31 further comprising:

the fan controller determining which of the software and hardware instructions have corresponding input information that demands a greater amount of cooling by the cooling system;

the fan controller generating a second control signal based on the selected instruction and transmitting the second control signal to the at least one fan, the second control signal controlling an amount of cooling provided by the at least one fan to the computing apparatus.

33. The computing apparatus of claim 31 further comprising means for loading a software driver for the fan controller to enable communications between the fan controller and the one of an operating system and an application program, the loading means automatically generating and transmitting a default control signal following the loading of the software driver to the fan controller, the default control signal setting a default amount of cooling to be provided by the at least one fan to the computing apparatus.

34. The computing apparatus of claim 31 wherein the fan controller periodically monitors for changes in the input information.

35. The computing apparatus of claim 31 wherein the fan controller selects a first operational mode corresponding to the software instruction from a plurality of stored predetermined operational modes, the first operational mode specifying the input information to be retrieved.

36. The computing apparatus of claim 35 wherein the input information comprises at least a first value associated with a first parameter that is part of the input information.

37. The computing apparatus of claim 36 wherein the fan controller periodically compares current values associated with the first parameter with said first value, and based on results of this comparison determines whether the first control signal is to be generated.

38. The computing apparatus of claim 31 wherein the fan controller includes a logic controller.

39. The computing apparatus of claim 38 wherein the logic controller includes a control table that defines a plurality of operational modes.

40. An article, comprising:

one or more computer-readable signal-bearing media;

means in the one or more media for receiving a software instruction originated by one of an operating system and an application program running on a computing apparatus and for receiving a hardware instruction from a hardware controller disposed in the computing apparatus;

means in the one or more media for retrieving input information related to the control of a cooling system corresponding to each received instruction;

means in the one or more media for selecting which of the software and hardware instruction is to be used;

means in the one or more media for generating a first control signal based on the selected instruction and its corresponding input information, and transmitting the first control signal to the cooling system, the first control signal controlling an amount of cooling provided by the cooling system to the computing apparatus.

41. The article of claim 40 further comprising means in the one or more media for loading a software driver to enable communications between a controller for the cooling system and the one of an operating system and an application program.