CA2371729A1 - Method of air filter diagnostic and air filter - Google Patents
Method of air filter diagnostic and air filter Download PDFInfo
- Publication number
- CA2371729A1 CA2371729A1 CA 2371729 CA2371729A CA2371729A1 CA 2371729 A1 CA2371729 A1 CA 2371729A1 CA 2371729 CA2371729 CA 2371729 CA 2371729 A CA2371729 A CA 2371729A CA 2371729 A1 CA2371729 A1 CA 2371729A1
- Authority
- CA
- Canada
- Prior art keywords
- face
- air pressure
- air
- filter
- air filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A method of diagnosing when an air filter is becoming clogged. A first step involves providing an air filter having a first face and a second face. A second step involves measuring air pressure at the first face to obtain a first air pressure reading. A third step involves measuring air pressure at the second face to obtain a second air pressure reading. A fourth step involves initiating a warning signal when a selected pressure differential in excess of a selected threshold exists as between the first air pressure reading and the second air pressure reading.
Description
TITLE OF THE INVENTION:
Method of Air Filter Diagnostic and Air Filter FIE?~D OF THE INVENTION
The pre ent invention relates to a method of diagnosing when an air filter is becoming clogged so that it can be replaced in a timely fashion and an air filter constructed in accordance with the method.
BACKGROUND OF THE INVENTION
United States patents 2,753,831; 4,215,646; 5,352,255;
and 6,320,513; all disclose devices which emit an audible tone when an air filter is becoming clogged so that it can be replaced in a timely fashion.
SU1~1ARY OF THE INVENTION
The present invention relates to an alternative approach to the problem of providing advanced warning than an air filter is becoming clogged so that it can be replaced in a timely fashion.
According to one aspect of the present invention there is provided a method of diagnosing when an air filter is becoming clogged. A first step involves providing an air filter having a first face and a second face. A second step involves measuring air pressure at the first face to obtain a first air pressure reading. A third step involves measuring air pressure at the second face to obtain a second air pressure reading. A fourth step involves initiating a warning signal when a selected pressure differential in excess of a selected threshold exists as between the first air pressure reading and the second air pressure reading.
In order to facilitate the public practising of the teachings of this invention, an air filter has been developed which incorporates features to permit :sensing to take place.
According to another aspect of the present invention there is provided An air filter which includes an air permeable filter medium having a first face and a second face. A first tube is positioned adjacent to the first face. A coupling is provided which is adapted to couple the first tube to a pressure sensing device. A second tube is positioned adjacent to the second face. A coupling is provided which is adapted to couple the second tube to a pressure sensing device.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIGURE 1 is a perspective view of: a filter constructed in accordance with the teachings of the present invention.
FIGURE 2 is a top plan view, in section, of the filter illustrated in FIGURE 1.
FIGURE 3 is a detailed perspective view of a sensing assembly insert which is attached to or incorporated in the filter illustrated in FIGURE 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a filter_ generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 3.
Structure and Relationship of Parts:
Take an existing furnace fi7_ter (commercial or residential) or equipment filter and add two pilot tubes that extend from the edge of the filter a di:>tance of about 2 to 6 inches with one tube on either side of -the filter medium. The tubes would be about 1~" in diameter with about 3/16" opening.
This component made from metal or plastic is incorporated into the filter to sample the air pressure on either side of the filter. Every time the filter is changed a new clean set of sensing tubes are already built into the filter eliminating the need for maintenance of permanently mounted sensing tubes.
A sensor that measures differential pressure would be mounted close by. The sensor would let the user know when the filter requires changing by a signal (light., buzzer etc). The sensor can be calibrated for each unit by blocking the appropriate amount of air flow through the filter with paper and then turning on the air flow source. This is the point at which the sensor alarm would go off to indicated it is time to change the filter.
The sensor is connected to the filter by a set of flexible tubes the are plugged into the one way connector that ensures the connection is made correctly.
The sensor can be powered by battery, low or high voltage and be ready to incorporate into an electronic system for future applications requiring signal processors for computer management systems Operation:
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a°' does not exclude the possibility that more than one of the element is present, unless> the context clearly requires that there be one and only one of the elements.
Method of Air Filter Diagnostic and Air Filter FIE?~D OF THE INVENTION
The pre ent invention relates to a method of diagnosing when an air filter is becoming clogged so that it can be replaced in a timely fashion and an air filter constructed in accordance with the method.
BACKGROUND OF THE INVENTION
United States patents 2,753,831; 4,215,646; 5,352,255;
and 6,320,513; all disclose devices which emit an audible tone when an air filter is becoming clogged so that it can be replaced in a timely fashion.
SU1~1ARY OF THE INVENTION
The present invention relates to an alternative approach to the problem of providing advanced warning than an air filter is becoming clogged so that it can be replaced in a timely fashion.
According to one aspect of the present invention there is provided a method of diagnosing when an air filter is becoming clogged. A first step involves providing an air filter having a first face and a second face. A second step involves measuring air pressure at the first face to obtain a first air pressure reading. A third step involves measuring air pressure at the second face to obtain a second air pressure reading. A fourth step involves initiating a warning signal when a selected pressure differential in excess of a selected threshold exists as between the first air pressure reading and the second air pressure reading.
In order to facilitate the public practising of the teachings of this invention, an air filter has been developed which incorporates features to permit :sensing to take place.
According to another aspect of the present invention there is provided An air filter which includes an air permeable filter medium having a first face and a second face. A first tube is positioned adjacent to the first face. A coupling is provided which is adapted to couple the first tube to a pressure sensing device. A second tube is positioned adjacent to the second face. A coupling is provided which is adapted to couple the second tube to a pressure sensing device.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIGURE 1 is a perspective view of: a filter constructed in accordance with the teachings of the present invention.
FIGURE 2 is a top plan view, in section, of the filter illustrated in FIGURE 1.
FIGURE 3 is a detailed perspective view of a sensing assembly insert which is attached to or incorporated in the filter illustrated in FIGURE 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a filter_ generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 3.
Structure and Relationship of Parts:
Take an existing furnace fi7_ter (commercial or residential) or equipment filter and add two pilot tubes that extend from the edge of the filter a di:>tance of about 2 to 6 inches with one tube on either side of -the filter medium. The tubes would be about 1~" in diameter with about 3/16" opening.
This component made from metal or plastic is incorporated into the filter to sample the air pressure on either side of the filter. Every time the filter is changed a new clean set of sensing tubes are already built into the filter eliminating the need for maintenance of permanently mounted sensing tubes.
A sensor that measures differential pressure would be mounted close by. The sensor would let the user know when the filter requires changing by a signal (light., buzzer etc). The sensor can be calibrated for each unit by blocking the appropriate amount of air flow through the filter with paper and then turning on the air flow source. This is the point at which the sensor alarm would go off to indicated it is time to change the filter.
The sensor is connected to the filter by a set of flexible tubes the are plugged into the one way connector that ensures the connection is made correctly.
The sensor can be powered by battery, low or high voltage and be ready to incorporate into an electronic system for future applications requiring signal processors for computer management systems Operation:
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a°' does not exclude the possibility that more than one of the element is present, unless> the context clearly requires that there be one and only one of the elements.
It will be apparent to one ski:Lled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (2)
1. A method of diagnosing when an air filter is becoming clogged, comprising the steps of:
providing an air filter having a first face and a second face;
measuring air pressure at the first face to obtain a first air pressure reading;
measuring air pressure at the second face to obtain a second air pressure reading;
initiating a warning signal when a selected pressure differential in excess of a selected threshold exists as between the first air pressure reading and the second air pressure reading.
providing an air filter having a first face and a second face;
measuring air pressure at the first face to obtain a first air pressure reading;
measuring air pressure at the second face to obtain a second air pressure reading;
initiating a warning signal when a selected pressure differential in excess of a selected threshold exists as between the first air pressure reading and the second air pressure reading.
2. An air filter, comprising:
an air permeable filter medium having a first face and a second face;
a first tube positioned adjacent to the first face;
a coupling adapted to couple the first tube to a pressure sensing device;
a second tube positioned adjacent to the second face;
and a coupling adapted to couple the second tube to a pressure sensing device.
an air permeable filter medium having a first face and a second face;
a first tube positioned adjacent to the first face;
a coupling adapted to couple the first tube to a pressure sensing device;
a second tube positioned adjacent to the second face;
and a coupling adapted to couple the second tube to a pressure sensing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2371729 CA2371729A1 (en) | 2002-02-12 | 2002-02-12 | Method of air filter diagnostic and air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2371729 CA2371729A1 (en) | 2002-02-12 | 2002-02-12 | Method of air filter diagnostic and air filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2371729A1 true CA2371729A1 (en) | 2003-08-12 |
Family
ID=27768261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2371729 Abandoned CA2371729A1 (en) | 2002-02-12 | 2002-02-12 | Method of air filter diagnostic and air filter |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2371729A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019219004A1 (en) * | 2019-12-05 | 2021-06-10 | Mahle International Gmbh | Filter element and a method for identifying the filter element |
-
2002
- 2002-02-12 CA CA 2371729 patent/CA2371729A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019219004A1 (en) * | 2019-12-05 | 2021-06-10 | Mahle International Gmbh | Filter element and a method for identifying the filter element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |