GB2095126A - Cleaning air filters - Google Patents

Cleaning air filters Download PDF

Info

Publication number
GB2095126A
GB2095126A GB8037706A GB8037706A GB2095126A GB 2095126 A GB2095126 A GB 2095126A GB 8037706 A GB8037706 A GB 8037706A GB 8037706 A GB8037706 A GB 8037706A GB 2095126 A GB2095126 A GB 2095126A
Authority
GB
United Kingdom
Prior art keywords
filter screen
water
filter
jet
foreign matter
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.)
Withdrawn
Application number
GB8037706A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEAT PUMPS W R Ltd
Original Assignee
HEAT PUMPS W R Ltd
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 HEAT PUMPS W R Ltd filed Critical HEAT PUMPS W R Ltd
Priority to GB8037706A priority Critical patent/GB2095126A/en
Publication of GB2095126A publication Critical patent/GB2095126A/en
Withdrawn legal-status Critical Current

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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
    • 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
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • 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
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/79—Regeneration of the filtering material or filter elements inside the filter by liquid process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

An air filter screen is cleaned by water directed on to its downstream side in the form of a divergent jet which covers the whole surface area of the screen and a second water jet directed across the upstream surface of the filter screen to wash away foreign matter dislodged by the first water jet. The cleaning may be timer- controlled. <IMAGE>

Description

SPECIFICATION Means for cleaning air filters This invention relates to an arrangement for cleaning an air filter, particularly filters that may be used in air conditioning systems and the like.
It is common to provide a filter screen at various positions in air conditioning systems, particularly air intakes or air outlets and over a period of time these screens become clogged with foreign matter.
It is an object of the present invention to provide means for removing such foreign matter periodically.
Accordingly the present invention provides for a filter screen, a water spray nozzle arranged and positioned to direct a water jet which is divergent to cover the whole surface area of the screen to dislodge foreign matter from the screen, and a second water jet arranged downstream of the filter screen from the first water jet to direct a curtain of water across the surface of the filter screen to wash away foreign matter dislodged by the first water jet.
Preferably the first water jet is directed on to the filter screen in a direction against the direction of air flow through the filter screen. Preferably means is provided to supply water to the jets on a timed cyclic basis.
In order to promote a fuller understanding of the above and other aspects of the present invention an embodiment will now be described, by way of example only, with reference to the accompanying drawings in which Figure 1 shows a prospective view of an embodiment of the invention and Figure 2 shows a side elevation of the same embodiment.
As can be seen from the drawings this embodiment of the invention is arranged for a generally rectangular air filter screen indicated at 3. A first nozzle 1 is arranged at a point downstream of the filter 3 in the direction of air flow through the filter indicated by arrow 4. The nozzle 1 is arranged to direct a jet of water which is divergent and shaped so that it covers the whole surface area of the filter screen 3, and is directed against the direction of air flow. Water from the jet 1 impinges on filter screens and dislodges any accumulated foreign matter from it on to the downstream side in the air flow.
A second water jet 2 is arranged towards the top of the upstream surface of the filter in the direction of airflow, and is arranged to direct a curtain of water downwards over the upstream surface of the filter 3. Water from the jet 2 thus washes away any foreign matter dislodged from the filter by water from the jet 1.
Means (not shown) is provided to supply water to the jets 1 and 2 on a timed cyclic basis so that the filter screen 3 is cleaned periodically.
In the embodiment described the filter screen 3 occupies a vertical plane which is perhaps the most common arrangement of such filter screens in air ducting and the like. However it will be appreciated that it is not essential for the filter screen to be vertical.
1. Means for cleaning a filter screen comprising a water spray nozzle arranged and positioned to direct a water jet which is divergent on to and to cover the whole surface area of the screen to dislodge foreign matter from the screen, and a second water jet arranged downstream of the filter screen from the first water jet to direct a curtain of water across the surface of the filter screen to wash away foreign matter dislodged by the first water jet.
2. Means for cleaning a filter screen as claimed in Claim 1 in which the first water jet is directed on to the filter screen in a direction across the flow of medium to be filtered by it, through the filter screen.
3. Means for cleaning a filter screen as claimed in Claim 1 or Claim 2 including means for supplying water to said jets on a timed cyclic basis.
4. Means for cleaning a filter screen substantially as herein described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Means for cleaning air filters This invention relates to an arrangement for cleaning an air filter, particularly filters that may be used in air conditioning systems and the like. It is common to provide a filter screen at various positions in air conditioning systems, particularly air intakes or air outlets and over a period of time these screens become clogged with foreign matter. It is an object of the present invention to provide means for removing such foreign matter periodically. Accordingly the present invention provides for a filter screen, a water spray nozzle arranged and positioned to direct a water jet which is divergent to cover the whole surface area of the screen to dislodge foreign matter from the screen, and a second water jet arranged downstream of the filter screen from the first water jet to direct a curtain of water across the surface of the filter screen to wash away foreign matter dislodged by the first water jet. Preferably the first water jet is directed on to the filter screen in a direction against the direction of air flow through the filter screen. Preferably means is provided to supply water to the jets on a timed cyclic basis. In order to promote a fuller understanding of the above and other aspects of the present invention an embodiment will now be described, by way of example only, with reference to the accompanying drawings in which Figure 1 shows a prospective view of an embodiment of the invention and Figure 2 shows a side elevation of the same embodiment. As can be seen from the drawings this embodiment of the invention is arranged for a generally rectangular air filter screen indicated at 3. A first nozzle 1 is arranged at a point downstream of the filter 3 in the direction of air flow through the filter indicated by arrow 4. The nozzle 1 is arranged to direct a jet of water which is divergent and shaped so that it covers the whole surface area of the filter screen 3, and is directed against the direction of air flow. Water from the jet 1 impinges on filter screens and dislodges any accumulated foreign matter from it on to the downstream side in the air flow. A second water jet 2 is arranged towards the top of the upstream surface of the filter in the direction of airflow, and is arranged to direct a curtain of water downwards over the upstream surface of the filter 3. Water from the jet 2 thus washes away any foreign matter dislodged from the filter by water from the jet 1. Means (not shown) is provided to supply water to the jets 1 and 2 on a timed cyclic basis so that the filter screen 3 is cleaned periodically. In the embodiment described the filter screen 3 occupies a vertical plane which is perhaps the most common arrangement of such filter screens in air ducting and the like. However it will be appreciated that it is not essential for the filter screen to be vertical. CLAIMS
1. Means for cleaning a filter screen comprising a water spray nozzle arranged and positioned to direct a water jet which is divergent on to and to cover the whole surface area of the screen to dislodge foreign matter from the screen, and a second water jet arranged downstream of the filter screen from the first water jet to direct a curtain of water across the surface of the filter screen to wash away foreign matter dislodged by the first water jet.
2. Means for cleaning a filter screen as claimed in Claim 1 in which the first water jet is directed on to the filter screen in a direction across the flow of medium to be filtered by it, through the filter screen.
3. Means for cleaning a filter screen as claimed in Claim 1 or Claim 2 including means for supplying water to said jets on a timed cyclic basis.
4. Means for cleaning a filter screen substantially as herein described with reference to the accompanying drawings.
GB8037706A 1980-11-25 1980-11-25 Cleaning air filters Withdrawn GB2095126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8037706A GB2095126A (en) 1980-11-25 1980-11-25 Cleaning air filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8037706A GB2095126A (en) 1980-11-25 1980-11-25 Cleaning air filters

Publications (1)

Publication Number Publication Date
GB2095126A true GB2095126A (en) 1982-09-29

Family

ID=10517531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8037706A Withdrawn GB2095126A (en) 1980-11-25 1980-11-25 Cleaning air filters

Country Status (1)

Country Link
GB (1) GB2095126A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445919A (en) * 1983-03-14 1984-05-01 Thermo Electron Corporation In situ rapid wash apparatus and method
EP0476464A1 (en) * 1990-09-20 1992-03-25 Rolf Dipl.-Ing. Joachimsmeier Process and apparatus for separating gas carried particles soluble in liquids
EP0368129B1 (en) * 1988-11-05 1993-08-04 VMB VESTA MASCHINENBAU GMBH &amp; CO. KG Suction dredger
EP0648885A1 (en) * 1993-10-15 1995-04-19 Esswein S.A. Device for cleaning the filter of a machine's drying system
CN108302663A (en) * 2018-04-13 2018-07-20 浙江仓森环境科技有限公司 Dust-extraction unit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445919A (en) * 1983-03-14 1984-05-01 Thermo Electron Corporation In situ rapid wash apparatus and method
EP0368129B1 (en) * 1988-11-05 1993-08-04 VMB VESTA MASCHINENBAU GMBH &amp; CO. KG Suction dredger
EP0476464A1 (en) * 1990-09-20 1992-03-25 Rolf Dipl.-Ing. Joachimsmeier Process and apparatus for separating gas carried particles soluble in liquids
EP0648885A1 (en) * 1993-10-15 1995-04-19 Esswein S.A. Device for cleaning the filter of a machine's drying system
FR2711073A1 (en) * 1993-10-15 1995-04-21 Esswein Sa Cleaning device for filter of the drying circuit by hot air flow of a machine, in particular for a washer-dryer machine or for a dryer.
CN108302663A (en) * 2018-04-13 2018-07-20 浙江仓森环境科技有限公司 Dust-extraction unit

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)