Switch frame electronic air filter alarming device

• US 6,734,801 B2
• Filed: 06/26/2002
• Issued: 05/11/2004
• Est. Priority Date: 06/26/2002
• Status: Expired due to Fees

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Scofield, William H.
• Primary Examiner(s): PHAM, TOAN NGOC
• Application Number:
  US10/180,687
• Publication Number:
  US 20040001003A1
• Time in Patent Office: 685 Days
• Field of Search: 340/607, 340/610, 340/611, 340/606, 340/608, 340/609, 964/24, 964/25, 964/29, 964/21
• US Class Current: 340/607
• CPC Class Codes: B01D 46/0086 Filter condition indicators
• CPC Class Codes: B01D 46/429 Means for wireless communication
• CPC Class Codes: B01D 46/446 by pressure measuring
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/39 Monitoring filter performance
• CPC Class Codes: F24F 13/28 Arrangement or mounting of filters

Abstract

An alarming apparatus and methods for use with an air filter are disclosed herein. A filament can be stretched across a portion or section of an air filter frame, wherein the portion or section comprises a first locus and a second locus located diagonally opposite the first locus. The filament can be attached at a first end of the filament to the air filter frame at the first locus. A micro-switch can be attached to a second end of the filament at the second locus. Additionally, an alarm can communicate through a communications device (wired and/or wireless) with the micro-switch, such that when the air filter becomes loaded with debris, the air filter deflects thereby causing a force to be exerted on the filament, which in turn triggers the micro-switch to transmit a signal to the alarm indicating that the air filter requires proper attention thereof. The filament can be stretched facing either an upstream or a downstream side of airflow thereof.

Claims

1. An alarm apparatus for use with an air filter, said apparatus comprising:

a filament stretched across at least one portion of an air filter frame of said air filter, wherein said at least one portion comprises a first locus and a second locus located opposite said first locus, such that said filament is attached at a first end of said filament to said air filter frame at said first locus;

a switch attached to a second end of said filament, said switch mounted to said air filter at said second locus of said at least one portion of said air filter frame; and

an alarm that communicates with said switch, such that when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament, which in turn triggers said switch to transmit a signal to said alarm indicating that said air filter requires proper attention thereof.

2. The apparatus of claim 1 wherein said filament is stretched across said at least one portion of said air filter frame facing an upstream side of airflow thereof.

3. The apparatus of claim 1 wherein said filament is stretched across said at least one portion of said air filter frame facing a downstream side of airflow thereof.

4. The apparatus of claim 1 wherein said switch is attached to said air filter frame by a wire which joins said switch to said second locus of said at least one portion of said air filter frame.

5. The apparatus of claim 1 wherein said alarm communicates with said switch through an electrical circuit thereof.

6. The apparatus of claim 1 further comprising a fan unit alarm card connected to said alarm.

7. The apparatus of claim 6 wherein said fan unit alarm card communicates with a Heating, Ventilating and Air Conditioning (HVAC) system.

8. The apparatus of claim 1 wherein said switch comprises a micro-switch.

9. An alarming apparatus for an air filter, said apparatus comprising:

a filament stretched across at least one section of an air filter frame of said air filter, wherein said at least one section comprises a first corner and a second corner located diagonally opposite said first corner, such that said filament is attached at a first end of said filament to said air filter frame at said first corner;

a micro-switch attached to a second end of said filament and mounted at said second corner of said at least one section of said air filter frame, wherein said micro-switch is electrically connected to a wire which is connected to a communications device; and

an alarm that communicates with said communications device, such that when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament, which in turn triggers said micro-switch to transmit a signal to said alarm indicating that said air filter requires proper attention thereof.

10. The apparatus of claim 9 further comprising:

a fan unit alarm card connected to said alarm, wherein said alarm communicates with said micro-switch through an electrical circuit thereof; and

wherein said fan unit alarm card communicates with a Heating, Ventilating and Air Conditioning (HVAC) system.

11. An alarm method for providing an alarm associated with an air filter, said method comprising the steps of:

stretching a filament across at least one portion of an air filter frame of said air filter, wherein said at least one portion comprises a first locus and a second locus located opposite said first locus, such that said filament is attached at a first end of said filament to said air filter frame at said first locus;

attaching a switch to a second end of said filament at said second locus of said at least one portion of said air filter frame; and

automatically triggering said switch to transmit a signal to an alarm indicating that said air filter requires proper attention thereof, when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament.

12. The method of claim 11 further comprising the step of:

stretching said filament across said at least one portion of said air filter frame facing an upstream side of airflow thereof.

13. The method of claim 11 further comprising the step of:

stretching said filament across said at least one portion of said air filter frame facing a downstream side of airflow thereof.

14. The method of claim 11 further comprising the step of:

attaching said switch to said air filter frame by a wire that joins said switch to said second locus of said at least one portion of said air filter frame.

15. The method of claim 11 further comprising the step of:

permitting said alarm to communicate with said switch through an electrical circuit thereof.

16. The method of claim 11 further comprising the step of:

connecting a fan unit alarm card to said alarm.

17. The method of claim 16 wherein said fan unit alarm card communicates with a Heating, Ventilating and Air Conditioning (HVAC) system.

18. The method of claim 11 further comprising the step of:

configuring said switch to comprise a micro-switch.

19. The method of claim 11 wherein said at least one portion of said air filter frame comprises a section of said air filter frame.

20. The method of claim 19 wherein said first locus comprises a first corner of said section and said second locus comprises a second corner of said section, wherein said first corner is located opposite said second corner.