Determining air filter replacement conditions using air flow and energy consumption values

• US 9,207,727 B2
• Filed: 02/24/2014
• Issued: 12/08/2015
• Est. Priority Date: 02/24/2014
• Status: Active Grant

• Current Assignee: Lenovo International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Enterprise Solutions (Singapore) Pte., Ltd. (Lenovo Group Ltd.)
• Inventors: Balogh, Nicholas J., Grout, Gordon B., Inkumsah, Kobina K., Johnson, Robert H. Jr.
• Primary Examiner(s): HOFSASS, JEFFERY A
• Application Number:
  US14/187,636
• Publication Number:
  US 20150241934A1
• Time in Patent Office: 652 Days
• Field of Search: 340/607, 340/608, 700/301, 702/47
• US Class Current: 1/1
• CPC Class Codes: G01P 5/06 using rotation of vanes measuring speed of rotating shafts G01P3/00
• CPC Class Codes: G06F 1/20 Cooling means

Abstract

A method of determining a condition of a filter located within a system is provided. The method may include determining a first air flow measurement value for a first air flow through the filter, determining a first energy consumption value associated with generating the first air flow through the filter, determining a first ratio between the first air flow measurement value and the first energy consumption value, determining a second air flow measurement value for a second air flow through the filter, determining a second energy consumption value associated with generating the second air flow through the filter, and determining a second ratio between the second air flow measurement value and the second energy consumption value. The filter may then be replaced based on a comparison between the determined first and the determined second ratio.

Claims

1. A method of determining a condition of a filter located within a system, the method comprising:

determining a first air flow measurement value for a first air flow through the filter;

determining a first energy consumption value associated with generating the first air flow through the filter;

determining a first ratio between the first air flow measurement value and the first energy consumption value;

determining a second air flow measurement value for a second air flow through the filter;

determining a second energy consumption value associated with generating the second air flow through the filter;

determining a second ratio between the second air flow measurement value and the second energy consumption value; and

replacing the filter based on a comparison between the determined first and the determined second ratio.

2. The method of claim 1, wherein the comparison between the determined first and the determined second ratio comprises determining when the second ratio falls below the first ratio.

3. The method of claim 1, wherein the determining of the first air flow measurement value comprises measuring the first air flow using an anemometer device.

4. The method of claim 3, wherein the determining of the second air flow measurement value comprises measuring the second air flow using the anemometer device.

5. The method of claim 1, wherein the determining of the first energy consumption value comprises measuring a first revolutions-per-minute (RPM) value corresponding to a fan that generates the first air flow through the filter.

6. The method of claim 5, wherein the determining of the second energy consumption value comprises measuring a second revolutions-per-minute (RPM) value corresponding to the fan that generates the second air flow through the filter.

7. The method of claim 1, wherein the first ratio value comprises a predetermined threshold value calculated when the filter is first installed within the system.

8. The method of claim 7, wherein the predetermined threshold value is adjusted based on a time difference between the determining of the first ratio and when the second ratio falls below the first ratio.

9. A computer system for determining a condition of a filter located within a system, the computer system comprising:

one or more processors, one or more computer-readable memories, one or more computer-readable tangible storage devices, and program instructions stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, wherein the computer system is capable of performing a method comprising;

determining a first air flow measurement value for a first air flow through the filter;

determining a first energy consumption value associated with generating the first air flow through the filter;

determining a first ratio between the first air flow measurement value and the first energy consumption value;

determining a second air flow measurement value for a second air flow through the filter;

determining a second energy consumption value associated with generating the second air flow through the filter;

determining a second ratio between the second air flow measurement value and the second energy consumption value; and

replacing the filter based on a comparison between the determined first and the determined second ratio.

10. The system of claim 9, wherein the comparison between the determined first and the determined second ratio comprises determining when the second ratio falls below the first ratio.

11. The system of claim 9, wherein the determining of the first air flow measurement value comprises measuring the first air flow using an anemometer device.

12. The system of claim 11, wherein the determining of the second air flow measurement value comprises measuring the second air flow using the anemometer device.

13. The system of claim 9, wherein the determining of the first energy consumption value comprises measuring a first revolutions-per-minute (RPM) value corresponding to a fan that generates the first air flow through the filter.

14. The system of claim 13, wherein the determining of the second energy consumption value comprises measuring a second revolutions-per-minute (RPM) value corresponding to the fan that generates the second air flow through the filter.

15. The system of claim 9, wherein the first ratio value comprises a predetermined threshold value calculated when the filter is first installed within the system.

16. The system of claim 15, wherein the predetermined threshold value is adjusted based on a time different between the determining of the first ratio and when the second ratio falls below the first ratio.

17. A computer program product for determining a condition of a filter located within a system, comprising:

one or more non-transitory computer-readable storage devices and program instructions stored on at least one of the one or more non-transitory computer-readable storage devices, the program instructions executable by a processor, the program instructions comprising;

determining a first air flow measurement value for a first air flow through the filter;

determining a first energy consumption value associated with generating the first air flow through the filter;

determining a first ratio between the first air flow measurement value and the first energy consumption value;

determining a second air flow measurement value for a second air flow through the filter;

determining a second energy consumption value associated with generating the second air flow through the filter;

determining a second ratio between the second air flow measurement value and the second energy consumption value; and

replacing the filter based on a comparison between the determined first and the determined second ratio.

18. The computer program of claim 17, wherein the comparison between the determined first and the determined second ratio comprises determining when the second ratio falls below the first ratio.

19. The computer program of claim 17, wherein the determining of the first air flow measurement value comprises measuring the first air flow using an anemometer device, and wherein the determining of the second air flow measurement value comprises measuring the second air flow using the anemometer device.

20. The computer program of claim 17, wherein the determining of the first energy consumption value comprises measuring a first revolutions-per-minute (RPM) value corresponding to a fan that generates the first air flow through the filter, and wherein the determining of the second energy consumption value comprises measuring a second revolutions-per-minute (RPM) value corresponding to the fan that generates the second air flow through the filter.