WO2003014838B1 - Clogged filter detector - Google Patents

Clogged filter detector

Info

Publication number
WO2003014838B1
WO2003014838B1 PCT/US2002/024760 US0224760W WO03014838B1 WO 2003014838 B1 WO2003014838 B1 WO 2003014838B1 US 0224760 W US0224760 W US 0224760W WO 03014838 B1 WO03014838 B1 WO 03014838B1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
strip
receiver
disposed
support means
Prior art date
Application number
PCT/US2002/024760
Other languages
French (fr)
Other versions
WO2003014838A3 (en
WO2003014838A2 (en
Inventor
David Wilson
Original Assignee
David Wilson
Xtec Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by David Wilson, Xtec Inc filed Critical David Wilson
Priority to EP02761233A priority Critical patent/EP1423678A4/en
Priority to AU2002326513A priority patent/AU2002326513A1/en
Publication of WO2003014838A2 publication Critical patent/WO2003014838A2/en
Publication of WO2003014838A3 publication Critical patent/WO2003014838A3/en
Publication of WO2003014838B1 publication Critical patent/WO2003014838B1/en
Priority to US10/764,727 priority patent/US7012685B1/en

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/26—Making use of optical waves, e.g. for measurements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Air Conditioning Control Device (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

A clogged filter detection system has an optical transmitter (32) aligned to pass light through an air filter (14) of an HVAC air flow plenum, a receiver (34) including a sensor and positioned to receive the transmitted light (48) directly or from a reflector (42), a processing assembly (35) receiving signals from the sensor and communicating a visual (104) or audible (106) indication when an accumulated level of obscuration exceeds a predetermined level and a component support structure. The support structure uses a 'U' or 'L' shaped bracket (60,63) attached to peripheral structure of a filter receptacle frame (12) and one or more side plates (24,26) of the bracket are connected to an arm (74,76) on which components are carried. The transmitter (32) and receiver (34) may be located on opposite sides of the filter (14) or on the same side, with a retroreflector (46) on the other side. The processing assembly includes a microprocessor (94) and related devices.

Claims

AMENDED CLAIMS[ Received by the International Bureau on 11 April 2003 (11 ,04.03); Original claim 1 amended remaining claims unchanged (1 page)]
1. A clogged filter detector for determining a level of obscuration of a flat filter disposed in an air conditioning system, said filter having a body and a peripheral frame and said system comprising a filter receptacle carried ixi a duct or plenum thereof, said receptacle including a plurality of rigid plates having surfaces generally parallel to a direction of air flow and defining outer walls of a structure into which a said filter may be removably inserted and retaining ledges connected to said plates and disposed perpendicular thereto, said plates and said ledges being adapted to come into contact with a said frame upon insertion of a said filter, said detector comprising: an optical transmitter positioned to transmit a beam of light through a said filter, a receiver including a sensor disposed to be contacted by said light beam after passing through said filter and further including means to provide an electrical signal representative of optical transmittance through said filter, said receiver and said filter aligned off-set from one another and said light beam non-parallel to air flow direction, and support means for holding said transmitter and said receiver in an aligned position with respect to a selected area of said filter, said support means including a bracket comprising at least a first strip connectable to a said receptacle plate and said first strip being disposed for placement between a said plate and an edge portion edge of said filter upon insertion of the filter, and a first arm connected to said first strip and extending to a position opposing a fece of said filter.
2. A clogged filter detector as defined in claim 1 wherein said support means comprises means for holding said transmitter and said receiver in an aligned position with respect to a selected area of said filter, said support means including a bracket comprising a first strip conforming to a said receptacle plate and at least one side strip connected to a said ledge and said first strip being disposed between a said plate and a side edge of a said filter upon insertion of the filter, and a first arm connected
PCT/US2002/024760 2001-08-06 2002-08-01 Clogged filter detector WO2003014838A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02761233A EP1423678A4 (en) 2001-08-06 2002-08-01 Clogged filter detector
AU2002326513A AU2002326513A1 (en) 2001-08-06 2002-08-01 Clogged filter detector
US10/764,727 US7012685B1 (en) 2001-08-06 2004-01-26 Clogged filter detector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31037701P 2001-08-06 2001-08-06
US60/310,377 2001-08-06

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/764,727 Continuation-In-Part US7012685B1 (en) 2001-08-06 2004-01-26 Clogged filter detector

Publications (3)

Publication Number Publication Date
WO2003014838A2 WO2003014838A2 (en) 2003-02-20
WO2003014838A3 WO2003014838A3 (en) 2003-04-10
WO2003014838B1 true WO2003014838B1 (en) 2003-05-22

Family

ID=23202222

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/024760 WO2003014838A2 (en) 2001-08-06 2002-08-01 Clogged filter detector

Country Status (3)

Country Link
EP (1) EP1423678A4 (en)
AU (1) AU2002326513A1 (en)
WO (1) WO2003014838A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7587108B2 (en) 2005-06-24 2009-09-08 3M Innovative Properties Company Optical device with cantilevered fiber array and planar lightwave circuit
JP5991893B2 (en) * 2012-09-26 2016-09-14 シャープ株式会社 Filter device and air conditioner
US9207727B2 (en) 2014-02-24 2015-12-08 Lenovo Enterprise Solutions (Singapore) Pte. Ltd. Determining air filter replacement conditions using air flow and energy consumption values
FR3029610B1 (en) * 2014-12-05 2019-09-20 Schneider Electric Industries Sas ENCRAGEMENT DETECTION FILTER SYSTEM FOR HEATING, VENTILATION OR AIR CONDITIONING INSTALLATION
US20220331729A1 (en) * 2021-04-19 2022-10-20 B/E Aerospace, Inc. Clogged air filter detection for galley inserts

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147697B (en) * 1983-10-05 1987-12-09 Fraunhofer Ges Forschung Level measurement method and apparatus
DE3644045A1 (en) * 1986-12-22 1988-06-30 Wilhelm Doerenkaemper Apparatus for monitoring the soiling of gas filters, in particular air filters
DE3716049A1 (en) * 1987-05-14 1988-11-24 Hagenuk Telecom Gmbh Device for monitoring air filters having filter mats
DE4014442A1 (en) * 1990-05-05 1991-11-07 Duepro Ag DEVICE FOR DISPLAYING THE DEGREE OF POLLUTION OF AIR FILTERS IN SUCTION CLEANING DEVICES, ROOM FILTERS OR THE LIKE.
US5796472A (en) * 1996-09-10 1998-08-18 Wirthlin; Alvin R. Optical translucency indicator for measurement of air filter dirtiness, liquid level, thickness, and other parameters

Also Published As

Publication number Publication date
AU2002326513A1 (en) 2003-02-24
WO2003014838A3 (en) 2003-04-10
EP1423678A2 (en) 2004-06-02
EP1423678A4 (en) 2005-05-25
WO2003014838A2 (en) 2003-02-20

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