US20120047682A1 - Vacuum cleaner with exhaust tube having an increasing cross-sectional area - Google Patents
Vacuum cleaner with exhaust tube having an increasing cross-sectional area Download PDFInfo
- Publication number
- US20120047682A1 US20120047682A1 US13/223,560 US201113223560A US2012047682A1 US 20120047682 A1 US20120047682 A1 US 20120047682A1 US 201113223560 A US201113223560 A US 201113223560A US 2012047682 A1 US2012047682 A1 US 2012047682A1
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- United States
- Prior art keywords
- filter
- vacuum cleaner
- chamber
- wall
- diameter
- 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
- 238000000926 separation method Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims 3
- 239000002245 particle Substances 0.000 description 4
- 239000010813 municipal solid waste Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1658—Construction of outlets
- A47L9/1666—Construction of outlets with filtering means
-
- 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
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
-
- 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
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
- A47L9/1683—Dust collecting chambers; Dust collecting receptacles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
Abstract
A vacuum cleaner includes a cyclonic chamber having an inlet for introducing airflow for circulation around a central axis of the cyclonic chamber. A filter chamber is positioned downstream of the cyclonic chamber and has a wall. A filter is positioned in the filter chamber. An exhaust tube extends along the central axis into the cyclonic chamber. The exhaust tube includes an inlet portion receiving the airflow from the cyclonic chamber and an outlet portion directing the airflow toward the filter chamber and the filter. The filter is in close proximity to the outlet portion. The cross-sectional area of the outlet portion increases in the downstream direction to reduce the speed of the airflow passing into the filter chamber and to evenly distribute the airflow passing through the outlet opening across the filter.
Description
- The present application claims priority to U.S. Provisional Patent Application No. 61/379,212, filed Sep. 1, 2010, the contents of which are incorporated herein by reference.
- The present invention relates to dirt cups for vacuum cleaners, and more particularly to exhaust tubes for cyclonic separation chambers.
- Cyclonic separation is a common method of separating dirt and debris from an airflow being sucked up or vacuumed by a vacuum cleaner. Cyclonic separation takes place within a cyclonic chamber. An air intake leading to the cyclonic chamber initiates a swirling or cyclonic airflow within the cyclonic chamber. Dirt and debris are directed in a radially outward direction thereby separating from the relatively cleaner air which is removed from the cyclonic chamber from a radially inward position. In some vacuums, the air is removed by an exhaust tube that extends downwardly from the top of the cyclonic chamber and along the central axis of the cyclonic chamber.
- The present invention provides, in one aspect, a vacuum cleaner including a cyclonic chamber, a filter chamber, and an exhaust tube. The cyclonic chamber includes an inlet for introducing airflow for circulation around a central axis of the cyclonic chamber. The filter chamber is positioned downstream of the cyclonic chamber and includes a wall. The filter is positioned in the filter chamber. The exhaust tube extends along the central axis into the cyclonic chamber and includes an inlet portion receiving the airflow from the cyclonic chamber and an outlet portion directing the airflow toward the filter chamber and the filter, which is in close proximity to the outlet portion. The cross-sectional area of the outlet portion increases in the downstream direction to reduce the speed of the airflow passing into the filter chamber and to evenly distribute the airflow passing through the outlet opening across the filter.
- The present invention provides, in another aspect, a vacuum cleaner including a housing having a central axis and an outer wall extending from a first end to a second end. The outer wall defines an air inlet between the first end and the second end. A lid assembly is selectively, movably coupled to the first end. The housing and lid assembly at least partially define a dirt collection chamber. A shroud is disposed within the housing. The shroud and the outer wall at least partially define a first cyclonic separation region. A cyclone body is at least partially disposed within the shroud and at least partially defines a second cyclonic separation region. An exhaust tube is coupled to the second end. The exhaust tube includes an inlet portion and an outlet portion. The inlet portion extends into and receives air from the second cyclonic separation region. The inlet portion has a substantially uniform cross sectional area. The outlet portion is downstream of the inlet portion, and has an increasing cross-sectional area in the downstream direction. A cover member is coupled to the exhaust assembly downstream of the outlet portion. The cover member and exhaust assembly define filter chamber. A filter member is disposed in the filter chamber and separated from the exhaust assembly outlet portion by an air gap. The filter member receives a substantially evenly distributed airflow from the exhaust assembly outlet portion.
- Other features and aspects of the invention will become apparent by consideration of the following detailed description and accompanying drawings.
-
FIG. 1 is a perspective view of a vacuum cleaner. -
FIG. 2 is an exploded view of a dirt cup assembly of the vacuum cleaner ofFIG. 1 . -
FIG. 3 is a side view of the dirt cup assembly ofFIG. 2 . -
FIG. 4 is a sectional view of a portion of the dirt cup assembly along line 4-4 ofFIG. 1 . - Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
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FIG. 1 illustrates avacuum cleaner 10 that includes adirt cup assembly 12 detachably secured to abody 14, afoot 16 including asuction nozzle 18, ahandle 20, and asuction source 22. Thesuction source 22 can be a motor and fan assembly or other suitable structure for creating a vacuum. Thevacuum cleaner 10 is shown as an upright cyclonic vacuum cleaner. Alternatively, thevacuum cleaner 10 can be of other types, including a canister vacuum cleaner, a central vacuum cleaner, and a hand held vacuum cleaner. - As shown in
FIG. 2 , thedirt cup assembly 12 includes acylindrical container 24, acover 26, acover insert 28, afilter 30, anexhaust tube 32, acyclone assembly 34, and abottom lid 36. Thecontainer 24 includes anopen top end 38, anopen bottom end 40, aninterior surface 42, anexterior surface 44, atangential air inlet 46, alever 48, and alocking lip 50 formed by alocking aperture 52 extending into thecontainer 24. Thelever 48 includes anactuator 54 and slides along atrack 56 formed on the exterior surface. Aspring 58 biases the lever toward thetop end 38. Preferably, thecontainer 24 is made of substantially transparent plastic. Alternatively, thecontainer 24 can be other shapes. - The
cover 26 is detachably secured to thecontainer 24 at thetop end 38. Thecover 26 is secured by a twist-lock or other suitable relationship between thecover 26 and thecontainer 24. Thecover 26 includes ahandle 60 and arelease switch 62 with alocking protrusion 64. The release switch 62 detachably secures thedirt cup assembly 12 to thebody 14. Thelocking protrusion 64 engages a corresponding locking lip (not shown) on thebody 12 when therelease switch 62 is in a locked position. In an unlocked position, thelocking protrusion 64 does not engage the locking lip, thereby allowing thedirt cup assembly 12 to be detached from thebody 14. Thecover 26 is coupled to thecover insert 28 which includesfins 66 that project downwardly away from thecover 26 to contact the top surface of thefilter 30. Thecover 26 also defines anair outlet 68 that exits thecover 26 and leads to the motor andfan assembly 22. - The
exhaust tube 32 is coupled to theopen top end 38 of thecontainer 24 and projects into the cyclone assembly along a central axis A of thecyclone assembly 34. Theexhaust tube 32 includes aninlet portion 70 for receiving the airflow from the cyclonic chamber and anoutlet portion 72 for directing the airflow toward thefilter 30, which is disposed in close proximity to theoutlet portion 72. Theinlet portion 70 includes a flow straightener in the form of intersecting vanes that assists in reducing turbulence of the airflow passing into theexhaust tube 32. The cross-sectional area of the outlet portion increases in the downstream direction to reduce the speed of the airflow passing into thefilter 30 and to evenly distribute the airflow passing through the outlet opening across thefilter 30. There is no structure present between thefilter 30 and theoutlet portion 72, and therefore there is no structure that physically interferes with the airflow exiting theoutlet portion 72 and entering thefilter 30. Theexhaust tube 32 defines a substantially constant diameter D1 over a portion of its length. Theoutlet portion 72 is defined by an arcuate wall rotated about the central axis A. The arcuate wall defines a radius R, which is at least 15% of the diameter D1. In some embodiments, the radius R is between 15% and 50% of the diameter D1, and in yet other embodiments, the radius R is between 15% and 25% of the diameter D1. - The
outlet portion 72 increases from the diameter D1 to anoutlet opening 74 having a diameter D2 on anupper wall 76 of theexhaust tube 32. The outlet opening diameter D2 is approximately twice the diameter D1. Theexhaust tube 32 also includes an upwardly extendingsidewall 78 disposed on theupper wall 76. Aperimeter 80 of thefilter 30 is supported by thesidewall 78 such that agap 82 is provided between theupper wall 76 and a bottom of thefilter 30. Thegap 82 has a distance D3 of at least 5% of the diameter D1 and less than 5 times the diameter D1. In some embodiments, the gap distance D3 is between 5% and 50% of the diameter D1, in other embodiments, the gap distance D3 is between 5% and 25% of the diameter D1, and in yet other embodiments, the gap distance D3 is between 5% and 10% of the diameter D1. - A
filter chamber 84 is positioned downstream of the cyclonic chamber and is defined by theupper wall 76 of the exhaust tube 32 (i.e., the bottom wall of the filter chamber 84), thesidewall 78 of the exhaust tube 32 (i.e., the sidewall of the filter chamber 84), and the cover insert 28 (i.e., the top wall of the filter chamber 84). As discussed above, thefilter 30 is positioned in thefilter chamber 84. Theexhaust tube 32 including the flow straightener, theupper wall 76, and thesidewall 78 is integrally formed as a single molded component. - The
lid 36 is pivotally connected to thecontainer 24 by ahinge 86 located near the bottom end. Thelid 36 pivots about thehinge 86 between a closed position (shown inFIG. 3 ) and a number of open positions. Alternatively, other hinge structures can be used to pivotally connect thelid 36 to thecontainer 24. - As shown in
FIGS. 2-4 , thecyclone assembly 34 includes afrustoconical cyclone 88, ashroud 90, askirt 92, and a support tube ortube 94. Theshroud 90 is secured to thecontainer 24 at or near thetop end 38. The lower portion of theshroud 90 is secured to the upper portion of thetube 94. Theskirt 92 extends radially outward from the upper portion of thetube 94. Theshroud 90 includes aperforated section 96 located above theskirt 92. Thecyclone 88 nests within the assembly of theshroud 90, theskirt 92, and thetube 94. Thecyclone 88 includes anair inlet 98 and adirt outlet 100. Thetube 94 includes aninterior surface 102 and anexterior surface 104. Alternatively, the cyclone assembly could include multiple cyclones arranged in series or in parallel with each other. In another alternative, the cyclone assembly could include a single cyclone surrounding an exhaust tube with an integrally formed shroud. - As shown in
FIG. 3 , a first dirt collection chamber is at least partially defined by thelid 36 in the closed position, theexterior surface 104 of thetube 94, and theinterior surface 42 ofcontainer 24. A second dirt collection chamber is at least partially defined by thelid 36 in the closed position and theinterior surface 102 of thetube 94. - As shown in
FIGS. 3 and 4 , thelid 36 is secured in the closed position by alatch 106. In a locked position (shown inFIG. 3 ), thelatch 106 is engaged to prevent thelid 36 from pivoting about thehinge 86. In an unlocked position, thelatch 106 is not engaged and thelid 36 is free to pivot about thehinge 86. To unlock thelatch 106, thelever 48 is pushed down to a lowered position, where theactuator 54 pushes thelatch 106 to move thelatch 106 from the locked position to the unlocked position. Thespring 58 returns thelever 48 to a raised position (shown inFIG. 3 ). Thelid 36 is resecured in the closed position by pivoting thelid 36 about thehinge 86 until thelatch 106 snaps into the locked position. - During use of the
vacuum cleaner 10, thesuction source 22 draws dirty air through thesuction nozzle 18 to thetangential air inlet 46 in thecontainer 24. The dirty air enters thedirt cup assembly 12 through thetangential air inlet 46 and is swirled in a cyclonic manner between theinterior surface 42 of thecontainer 24 and thecyclone assembly 34. This cyclonic action separates relatively large dirt particles from the dirty air. These relatively large dirt particles are collected in the first dirt collection chamber. The partially cleaned air flows through theperforated section 96 of theshroud 90 to thecyclone air inlet 98. The partially cleaned air is swirled in a cyclonic manner within thecyclone 88. This cyclonic action separates relatively small dirt particles from the partially cleaned air. These relatively small dirt particles exit the cyclone through thedirt outlet 100 and are collected in the second dirt collection chamber. The cleaned air passes through theexhaust tube 32, thefilter 30, and theair outlet 68 to thesuction source 22, and is finally exhausted from thevacuum cleaner 10. - To empty the
dirt cup assembly 12, thedirt cup assembly 12 is released from thebody 14 by sliding therelease switch 62 from the locked position to the unlocked position. Then, thedirt cup assembly 12 is detached from thebody 14. Thedirt cup assembly 12 is then positioned above a trash can or other waste container and thelid 36 is opened to empty the dirt collected in the first dirt collection chamber and the second dirt collection chamber into the trash can. After thedirt cup assembly 12 is emptied, thelid 36 is returned to the closed position and thedirt cup assembly 12 is secured to thebody 14. - Various features of the invention are set forth in the following claims.
Claims (20)
1. A vacuum cleaner comprising:
a cyclonic chamber having an inlet for introducing airflow for circulation around a central axis of the cyclonic chamber;
a filter chamber positioned downstream of the cyclonic chamber and having a wall;
a filter positioned in the filter chamber; and
an exhaust tube extending along the central axis into the cyclonic chamber, the exhaust tube including an inlet portion receiving the airflow from the cyclonic chamber and an outlet portion directing the airflow toward the filter chamber and the filter, which is in close proximity to the outlet portion, wherein the outlet portion includes an outlet opening on the wall of the filter chamber upstream of the filter, wherein the cross-sectional area of the outlet portion increases in the downstream direction to reduce the speed of the airflow passing into the filter chamber and to evenly distribute the airflow passing through the outlet opening across the filter, and wherein the exhaust tube defines a substantially constant diameter over a portion of its length.
2. The vacuum cleaner of claim 1 , wherein a gap distance is defined between the wall and the filter, and wherein the gap distance is at least 5% of the diameter.
3. The vacuum cleaner of claim 2 , wherein the gap distance is between 5% and 50% of the diameter.
4. The vacuum cleaner of claim 2 , wherein the gap distance is between 5% and 25% of the diameter.
5. The vacuum cleaner of claim 2 , wherein the gap distance is between 5% and 10% of the diameter.
6. The vacuum cleaner of claim 1 , wherein outlet portion is defined by an arcuate wall rotated about the central axis, and wherein the arcuate wall defines a radius of at least 15% of the diameter.
7. The vacuum cleaner of claim 6 , wherein the radius is between 15% and 50% of the diameter.
8. The vacuum cleaner of claim 6 , wherein the radius is between 15% and 25% of the diameter.
9. The vacuum cleaner of claim 1 , wherein the outlet portion increases from the diameter to an outlet opening diameter on the wall, the outlet opening diameter being approximately twice the diameter.
10. The vacuum cleaner of claim 1 , wherein the wall and the exhaust tube are integrally formed as a single molded component.
11. The vacuum cleaner of claim 1 , wherein the wall is a bottom wall of the filter housing, and wherein the filter chamber includes an upwardly-directed sidewall, wherein a perimeter of the filter is supported by the sidewall above the bottom wall to provide a gap between the bottom wall and a bottom of the filter.
12. The vacuum cleaner of claim 11 , wherein the bottom wall, the sidewall, and the exhaust tube are integrally formed as a single molded component.
13. The vacuum cleaner of claim 1 , further comprising a first stage cyclonic chamber, and wherein the cyclonic chamber is a second stage cyclonic chamber downstream of the first stage cyclonic chamber.
14. The vacuum cleaner of claim 1 , further comprising a motor-driven fan configured to create the airflow, the filter being located upstream of the motor-driven fan.
15. The vacuum cleaner of claim 1 , wherein the inlet portion of the exhaust tube includes a flow straightener in the form of intersecting vanes.
16. A vacuum cleaner, comprising:
a housing having a central axis and an outer wall extending from a first end to a second end, the outer wall defining an air inlet between the first end and the second end;
a lid assembly selectively, movably coupled to the first end, the housing and lid assembly at least partially defining a dirt collection chamber;
a shroud disposed within the housing, the shroud and the outer wall at least partially defining a first cyclonic separation region;
a cyclone body at least partially disposed within the shroud, the cyclone body at least partially defining a second cyclonic separation region;
an exhaust assembly coupled to the second end, the exhaust assembly including
an inlet portion extending into and receiving air from the second cyclonic separation region, the inlet portion having a substantially uniform cross sectional area, and
an outlet portion downstream of the inlet portion, the outlet portion having an increasing cross-sectional area in the downstream direction;
a cover member coupled to the exhaust assembly downstream of the outlet portion, the cover member and exhaust assembly defining a filter chamber;
a filter member disposed in the filter chamber and separated from the exhaust assembly outlet portion by an air gap, the filter member receiving a substantially evenly distributed airflow from the exhaust assembly outlet portion.
17. The vacuum cleaner of claim 16 , wherein the exhaust assembly inlet portion includes a flow straightener in the form of intersecting vanes.
18. The vacuum cleaner of claim 16 , wherein the shroud, the cyclone body, and the exhaust assembly are substantially co-axially disposed along the central axis.
19. The vacuum cleaner of claim 18 , wherein the outlet portion is defined by an arcuate wall rotated about the central axis.
20. The vacuum cleaner of claim 16 , further comprising a motor-driven fan configured to create the airflow, the filter member being located upstream of the motor-driven fan.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/223,560 US20120047682A1 (en) | 2010-09-01 | 2011-09-01 | Vacuum cleaner with exhaust tube having an increasing cross-sectional area |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US37921210P | 2010-09-01 | 2010-09-01 | |
US13/223,560 US20120047682A1 (en) | 2010-09-01 | 2011-09-01 | Vacuum cleaner with exhaust tube having an increasing cross-sectional area |
Publications (1)
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US20120047682A1 true US20120047682A1 (en) | 2012-03-01 |
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ID=45695182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/223,560 Abandoned US20120047682A1 (en) | 2010-09-01 | 2011-09-01 | Vacuum cleaner with exhaust tube having an increasing cross-sectional area |
Country Status (8)
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US (1) | US20120047682A1 (en) |
JP (1) | JP2013536736A (en) |
CN (1) | CN103327867A (en) |
AU (1) | AU2011295880A1 (en) |
BR (1) | BR112013004940A2 (en) |
GB (1) | GB2495894A (en) |
MX (1) | MX2013002411A (en) |
WO (1) | WO2012031077A1 (en) |
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US20130133155A1 (en) * | 2011-11-28 | 2013-05-30 | Julio C. Perez | Vacuum cleaner incorporating noise suppression system |
USD703017S1 (en) | 2011-01-07 | 2014-04-22 | Black & Decker Inc. | Screwdriver |
US9161669B2 (en) | 2013-03-01 | 2015-10-20 | Omachron Intellectual Property Inc. | Surface cleaning apparatus |
US9199362B2 (en) | 2010-01-07 | 2015-12-01 | Black & Decker Inc. | Power tool having rotary input control |
US9204773B2 (en) | 2013-03-01 | 2015-12-08 | Omachron Intellectual Property Inc. | Surface cleaning apparatus |
US9227151B2 (en) | 2013-02-28 | 2016-01-05 | Omachron Intellectual Property Inc. | Cyclone such as for use in a surface cleaning apparatus |
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Also Published As
Publication number | Publication date |
---|---|
BR112013004940A2 (en) | 2016-08-16 |
AU2011295880A1 (en) | 2013-04-18 |
CN103327867A (en) | 2013-09-25 |
WO2012031077A1 (en) | 2012-03-08 |
GB2495894A (en) | 2013-04-24 |
MX2013002411A (en) | 2013-07-05 |
GB201303087D0 (en) | 2013-04-10 |
JP2013536736A (en) | 2013-09-26 |
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