Smart fan modules and system

• US 6,592,449 B2
• Filed: 02/25/2002
• Issued: 07/15/2003
• Est. Priority Date: 02/24/2001
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Mok, Lawrence S., Cipolla, Thomas M., Kaufman, Richard I.
• Primary Examiner(s): Schuberg, Darren
• Assistant Examiner(s): DUONG, HUNG V
• Application Number:
  US10/083,270
• Publication Number:
  US 20020121555A1
• Time in Patent Office: 505 Days
• Field of Search: 454/184, 236/49.1, 361/687, 361/686, 361/685, 361/688-690, 415/213, 312/236, 165/80.3, 165/122
• US Class Current: 454/184
• CPC Class Codes: F04D 25/166 using fans
• CPC Class Codes: F04D 27/004 by varying driving speed
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: G06F 15/17381 Two dimensional, e.g. mesh, torus
• CPC Class Codes: G06F 17/142 Fast Fourier transforms, e.g. using a Cooley-Tukey type algorithm
• CPC Class Codes: G06F 9/52 Program synchronisation; Mutual exclusion, e.g. by means of semaphores
• CPC Class Codes: G06F 9/526 Mutual exclusion algorithms
• CPC Class Codes: G09G 5/008 Clock recovery
• CPC Class Codes: H04L 7/0338 the correction of the phase error being performed by a feed forward loop
• CPC Class Codes: H05K 7/20581 Cabinets including a drawer for fans
• CPC Class Codes: H05K 7/20836 Thermal management, e.g. server temperature control
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A fan module including: two or more individual fans, each fan having an air movement means and a motor engaged with the air movement means for accelerating air entering each of the two or more individual fans; a temperature sensor for sensing a temperature associated with the two or more fans and for outputting a first signal corresponding to the temperature; rotational speed sensor for outputting a second signal corresponding to a rotational speed of each of the two or more fans; and a processor for receiving the first and second signals and controlling the two or more individual fans based on the first and second signals.

Claims

1. A fan module comprising:

two or more individual fans, each fan having an air movement means and a motor engaged with the air movement means for accelerating air entering each of the two or more individual fans;

a temperature sensor for sensing a temperature associated with the two or more fans and for outputting a first signal corresponding to the temperature;

rotational speed means for outputting a second signal corresponding to a rotational speed of each of the two or more fans; and

a processor for receiving the first and second signals and controlling the two or more individual fans based on the first and second signals.

2. The fan module of claim 1, wherein the temperature sensor is selected from a group consisting of a thermistor and thermocouple.

3. The fan module of claim 1, wherein the rotational speed means comprises an RPM signal output from each of the two or more individual fans, the RPM signal comprising the second signal.

4. The fan module of claim 1, wherein each processor controls each corresponding fan by varying a pulse width of a supply voltage supplied to each of the two or more individual fans.

5. The fan module of claim 1, further comprising a bracket for housing each of the two or more fans.

6. The fan module of claim 1, further comprising means for damping vibration from each of the two or more fans.

7. The fan module of claim 1, further comprising a nonvolatile memory connected to each processor for storing a control program for instructing each processor.

8. An array of fans, each fan having an air movement means and a motor engaged with the air movement means for accelerating air entering each fan, the array of fans comprising:

two or more fan modules, each fan module having two or more individual fans, a temperature sensor for sensing a temperature associated with the two or more fans and for outputting a first signal corresponding to the temperature, rotational speed means for outputting a second signal corresponding to a rotational speed of each of the two or more fans, and a processor for receiving the first and second signals and controlling the two or more individual fans based on the first and second signals; and

a fan frame for housing the at least two or more fan modules.

9. The array of fans of claim 8, further comprising a bracket corresponding to each of the two or more fan modules, each bracket housing the two or more fans therein and further having a means for securing to the frame.

10. The array of fans of claim 9, further comprising a host controller for interacting with each of the processors of each of the two or more modules.

11. The array of fans of claim 10, further comprising an electrical connector on each bracket and a mating electrical connector on the frame for electrically connecting each of the processors to the host controller.

12. The array of fans of claim 10, further comprising at least one indicator operatively connected to the host controller and disposed on a side of the bracket for displaying the status of the fan module.

13. The array of fans of claim 10, further comprising a data link operatively connected to the host controller for communicating with a remote location.

14. The array of fans of claim 11, where each electrical connector has location identification pins hard wired therein for determining the physical location of the fan module in the frame.

15. The array of fans of claim 12, wherein the at least one indicator comprises two LED indicators, one of which is a first color and the second of which is a second color different from the first color.