SE546198C2 - A pre-filter arrangement for an industrial dust extractor - Google Patents
A pre-filter arrangement for an industrial dust extractorInfo
- Publication number
- SE546198C2 SE546198C2 SE2250866A SE2250866A SE546198C2 SE 546198 C2 SE546198 C2 SE 546198C2 SE 2250866 A SE2250866 A SE 2250866A SE 2250866 A SE2250866 A SE 2250866A SE 546198 C2 SE546198 C2 SE 546198C2
- Authority
- SE
- Sweden
- Prior art keywords
- filter
- side wall
- dust extractor
- previous
- interior volume
- Prior art date
Links
- 238000011045 prefiltration Methods 0.000 title claims abstract description 34
- 239000000428 dust Substances 0.000 title claims abstract description 19
- 239000013618 particulate matter Substances 0.000 claims abstract 2
- 241000264877 Hippospongia communis Species 0.000 claims 1
- 239000012858 resilient material Substances 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
-
- 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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
-
- 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
- B01D46/90—Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration or maintenance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/02—Filtering elements having a conical form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/46—Several filtrate discharge conduits each connected to one filter element or group of filter elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A pre-filter (200) for a heavy-duty dust extractor (100),the pre-filter (200) comprising a filter aperture (210) and a filter side wall (220), where the side wall is arranged to permit a flow of air to pass the side wall and to prevent at least some particulate matter from passing the side wall, wherein the filter side wall (220) extends away from the filter aperture (210) and tapers inwards towards a center axis (260) of the filter (200) to define a filter interior volume (V),where the pre-filter (200) is arranged to hold a separating wall (230) in position in the filter interior volume (V) to divide the filter interior volume (V) in at least two parts.
Description
Rotation guide member arranged to guide an axial rotation of the pre-filter when inserted in a dust extractor. These pre-filters are more difficult to insert into a dust extractor pre-separator with the wrong rotation about the center axis of the filter. The rotation guide member is particularly suitable for use with filters with more than one part, as discussed herein, since the separating wall inside these filters may be important to align at the intended rotation.
The rotation guide member may for instance comprise a protrusion arranged to engage a corresponding recess on the dust extractor, a recess or notch arranged to engage a corresponding protrusion on the dust extractor and/or a visual indication of pre-filter rotation about a center axis (260) of the pre-filter.
A dust extractor comprising this pre-filter and a lid arranged to be prevented from entering into a closed position if the pre-filter is not correctly rotated to an intended rotation about the center axis is associated with advantages. This lid prevents use of the dust extractor if the pre-filter is not correctly rotated.
Some of the above-mentioned deficiencies in the art may also be alleviated by a valve arrangement configured to generate a reverse flow of air, preferably a pulse of air, to clean a pre-filter for a heavy-duty dust extractor. The arrangement comprises a main valve closure body arranged to move between a first position which is a suction position and a second position which is a pre- filter cleaning position, where, in the first position, the main valve closure body is arranged to seal a passage between an ambient pressure side and a low pressure side of the valve arrangement, and where, in the second position, the main valve closure body is arranged to seal a passage between the low pressure side of the valve arrangement and a suction conduit while opening up the passage between the ambient pressure side and the low pressure side of the valve arrangement to let a burst of air run in reverse through the pre- filter. The valve arrangement further comprises a control body, connected to the main valve closure body, such that a position of the main valve closure body is determined by a position of the control body, a control chamber, partially defined by the control body, whereby a volume of the control chamber
Claims (18)
1. A pre-filter (200) for a heavy-duty dust extractor (100), the pre-filter (200) comprising a filter aperture (210) and a filter side wall (220), where the side wall is arranged to permit a flow of air to pass the side wall and to prevent at least some particulate matter from passing the side wall, wherein the filter side wall (220) extends away from the filter aperture (210) and tapers inwards towards a center axis (260) of the filter (200) to define a filter interior volume (V), where the pre-filter (200) is arranged to hold a separating wall (230) in position in the filter interior volume (V) to divide the filter interior volume (V) in at least two parts.
2. The pre-filter (200) according to claim 1, where the filter side wall (220) has any of a conical, a frustoconical, a pyramidal, or a frustopyramidal shape.
3. The pre-filter (200) according to claim 2, where the filter side wall (220) forms an angle (a) with respect to a central axis of the pre-filter (260) between 10-30 degrees, and preferably 20 degrees.
4. The pre-filter (200) according to any previous claim, where a first resilient seal (240) extends around a rim of the filter aperture (210) and a second resilient seal (250) is formed on an edge of the separating wall (230) dividing the filter aperture (210) in at least two parts.
5. The pre-filter (200) according to any previous claim, where the separating wall (230) is fixedly attached in the filter interior volume (V).
6. The pre-filter (200) according to any of claims 1-4, where the pre-filter (200) comprises a separating wall holding arrangement, such as a groove, (270) arranged to receive and to releasably hold the separating wall (230) in position in the filter interior volume (V).
7. The pre-filter (200) according to any previous claim, where the filter aperture (210) is of disc shape and the separating wall (230) is planar to dividethe filter interior volume (V) and the filter aperture (210) in a first and a second half-disc shaped part.
8. The pre-filter (200) according to any previous claim, where a height (H) of the filter measured along the center axis (260) is between 300-400mm, and preferably 345mm.
9. The pre-filter (200) according to any previous claim, where a thickness (W) of the filter side wall (210) is between 20-40mm, and preferably 30mm.
10. The pre-filter (200) according to any previous claim, where the separating wall (230) comprises a re-enforcement structure configured to resist deformation of the separating wall (230).
11. The pre-filter (200) according to claim 10, where the separating wall (230) re-enforcement structure comprises ribs and/or a honey-comb structure.
12. The pre-filter (200) according to any previous claim, where portions of the filter side wall (220) associated with the at least two parts have different filter characteristics.
13. The pre-filter (200) according to any previous claim, comprising a rotation guide member (300, 310, 320) arranged to guide an axial rotation of the pre- filter (200) when inserted in a dust extractor (100).
14. A dust extractor (100) comprising the pre-filter (200) according to any previous claim.
15. The dust extractor (100) according to claim 14, further comprising a hatch mechanism (600), the mechanism comprising an aperture (610) having a perimeter (620), and at least three elongated obturator elements (640) pivotably attached along the perimeter (620) at respective hinge ends (630), each obturator element comprising a distal end (635) arranged opposite to the hinge end (630) along the extension direction of the obturator element (640), wherein adjacent obturator elements (640) arranged along the perimeter (620) are connected by foldable joining members (660) arranged to guide the distalends (635) to a common intersection point distanced from a plane of the aperture, whereby the obturator elements (640) are arranged to fold about the respective hinge ends (630) to a position of mutual support to close the hatch mechanism (600).
16. The dust extractor (100) according to claim 14 or 15, where the filter interior volume (V) of the pre-filter (200) is divided in two parts, where each part is associated with a respective valve arrangement (400) arranged to connect the part of the filter interior volume (V) to an ambient pressure side of the valve arrangement (400) upon triggering of the valve arrangement (400).
17. The dust extractor (100) according to claim 16, comprising a control unit (160) arranged to alternately trigger valve openings of the two valve arrangements (400) to repeatedly and in sequence clean each filter part one after the other.
18. The dust extractor (100) according to any of claims 14-17, comprising a hatch mechanism (600) arranged between a pre-separator (120) of the dust extractor (100) and a dust container of the dust extractor, where the hatch mechanism (600) is at least partly formed in a resilient material.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2250866A SE546198C2 (en) | 2022-07-07 | 2022-07-07 | A pre-filter arrangement for an industrial dust extractor |
| SE2350747A SE546709C2 (en) | 2022-07-07 | 2023-06-19 | Pre-filter arrangements and valves for an industrial dust extractor |
| CN202380050259.4A CN119451609A (en) | 2022-07-07 | 2023-06-19 | Pre-filter units and valves for industrial dust collectors |
| SE2350748A SE547079C2 (en) | 2022-07-07 | 2023-06-19 | Pre-filter for a heavy-duty dust extractor comprising a rotation guide member |
| AU2023303357A AU2023303357A1 (en) | 2022-07-07 | 2023-06-19 | Pre-filter arrangements and valves for an industrial dust extractor |
| EP23835928.5A EP4551082A1 (en) | 2022-07-07 | 2023-06-19 | Pre-filter arrangements and valves for an industrial dust extractor |
| PCT/SE2023/050629 WO2024010509A1 (en) | 2022-07-07 | 2023-06-19 | Pre-filter arrangements and valves for an industrial dust extractor |
| EP25214329.2A EP4667156A2 (en) | 2022-07-07 | 2023-06-19 | Pre-filter arrangements and valves for an industrial dust extractor |
| DE102023116781.2A DE102023116781A1 (en) | 2022-07-07 | 2023-06-26 | PRE-FILTER DEVICES AND VALVES FOR AN INDUSTRIAL DUST SEPARATOR |
| AU2025271209A AU2025271209A1 (en) | 2022-07-07 | 2025-11-24 | Pre-filter arrangements and valves for an industrial dust extractor |
| AU2025271210A AU2025271210A1 (en) | 2022-07-07 | 2025-11-24 | Pre-filter arrangements and valves for an industrial dust extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2250866A SE546198C2 (en) | 2022-07-07 | 2022-07-07 | A pre-filter arrangement for an industrial dust extractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE2250866A1 SE2250866A1 (en) | 2024-01-08 |
| SE546198C2 true SE546198C2 (en) | 2024-06-25 |
Family
ID=89768200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE2250866A SE546198C2 (en) | 2022-07-07 | 2022-07-07 | A pre-filter arrangement for an industrial dust extractor |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE546198C2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025254578A1 (en) * | 2024-06-05 | 2025-12-11 | Husqvarna Ab | A dust extractor with an improved drive unit |
| SE2450617A1 (en) * | 2024-06-05 | 2025-12-06 | Husqvarna Ab | A dust extractor with an improved drive unit |
| SE2450616A1 (en) * | 2024-06-05 | 2025-12-06 | Husqvarna Ab | A dust extractor with separate working air flows |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050081321A1 (en) * | 2003-10-15 | 2005-04-21 | Milligan Michael A. | Hand-held cordless vacuum cleaner |
| US20120090640A1 (en) * | 2009-04-22 | 2012-04-19 | Alfred Kaercher Gmbh & Co. Kg | Method for cleaning two filters of a suction device for cleaning purposes and suction device for performing the method |
| US20130263406A1 (en) * | 2010-09-18 | 2013-10-10 | Nilfisk-Advance A/S | Filter cleaning for dirt suction devices comprising an external fan |
| WO2021251873A1 (en) * | 2020-06-11 | 2021-12-16 | Husqvarna Ab | A valve arrangement for an industrial dust extractor |
-
2022
- 2022-07-07 SE SE2250866A patent/SE546198C2/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050081321A1 (en) * | 2003-10-15 | 2005-04-21 | Milligan Michael A. | Hand-held cordless vacuum cleaner |
| US20120090640A1 (en) * | 2009-04-22 | 2012-04-19 | Alfred Kaercher Gmbh & Co. Kg | Method for cleaning two filters of a suction device for cleaning purposes and suction device for performing the method |
| US20130263406A1 (en) * | 2010-09-18 | 2013-10-10 | Nilfisk-Advance A/S | Filter cleaning for dirt suction devices comprising an external fan |
| WO2021251873A1 (en) * | 2020-06-11 | 2021-12-16 | Husqvarna Ab | A valve arrangement for an industrial dust extractor |
Also Published As
| Publication number | Publication date |
|---|---|
| SE2250866A1 (en) | 2024-01-08 |
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