CA1182613A - Vacuum cleaning appliance having a plurality of cyclone separators of different efficiencies - Google Patents
Vacuum cleaning appliance having a plurality of cyclone separators of different efficienciesInfo
- Publication number
- CA1182613A CA1182613A CA000380126A CA380126A CA1182613A CA 1182613 A CA1182613 A CA 1182613A CA 000380126 A CA000380126 A CA 000380126A CA 380126 A CA380126 A CA 380126A CA 1182613 A CA1182613 A CA 1182613A
- Authority
- CA
- Canada
- Prior art keywords
- cyclone
- air
- dirt
- casing
- interior
- 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.)
- Expired
Links
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
- A47L9/1616—Multiple arrangement thereof
- A47L9/1625—Multiple arrangement thereof for series flow
- A47L9/1633—Concentric cyclones
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/03—Vacuum cleaner
Abstract
ABSTRACT
A vacuum cleaning appliance comprises a lower efficiency cyclone unit and a high efficiency cyclone unit connected in series. This enables both large and fine dirt particles to be dealt with.
A vacuum cleaning appliance comprises a lower efficiency cyclone unit and a high efficiency cyclone unit connected in series. This enables both large and fine dirt particles to be dealt with.
Description
~6~;~
DESCRI~ION
~his invention relates to a vacuum suction cleaning appliance and in particular to a portable domestic appliance of the kind described in the published EPC Specification No. 0 018 197.
EPC Specification No. 0 018 197 describes an appliance in which a cleaner head for contacting a dirty surface is connected to the interior of the casing in which an airflow is set up by a motor driven fan. ~he casing contains two cyclone units in series operating successfully to e~tract dirt particles (dust and other extraneous matter) from the airflow therethrough and to deposit the extracted dirt.
A cleaning appliance based on cyclone u~its has the advantage that dust bags are not required as dirt can be discharged from the appliance by removing and separating the cyclones from the sur-rounding casing. Other advantages are that the air discharged from the appliance is substa~tially dust free a d the use of filters as main cleaning elements is avoided.
In the appliance described in the said EPC
patent application each of the two cyclone units has a body of substantiall~ frusto-conical shape, this shape serving to maintain the velocity of the dirt particles swirling therein and hence render the c~clone capable of depositing fine dirt particles of small diameter. Such cyclone units with the means to maintain the velocity of the fine dirt particles will hereinafter be referred to as "high efficiency"
cyclones.
This invention recognises that a vacuum cleaner incorporating only the higher efficiency cyclones necessary to deal with the fine particles does not operate entirely satisfactorily under no~al domestic conditions when dirt particles of larger size and other extraneous objects are sucked into the appli-ance. These larger size particles tend to be retained either perfor~ing the spiral or circular motion in the cyclqne or drif-ting to the cyclone central regions and are not deposited. ~his causes noise and interferes with the efficient operation of the cyclone.
~ ccordingly the present invention proposes incorporating into the air passage upstream, relatively to the inlet for dirty air, o~ the high efficiency cyclone unit a cyclone deliberately constructed ~o be of lower efficiency.
This '~lower efficiency" c~clone though not ultimately capable of dealing effectively with the finest particles 9 i.e. particles of 50 microns diameter or under, carries out a primary cleaning a&tion of the dirty air flow by depositing all but some of these finer particles. The high efficiency cyclone is then left to function in its optimum conditions with comparatively clean air and only particles of very small size.
~ he lower efficiency can be contrived by omitting the frusto-conical formation and construct~
ing for example the cyclone casing of cylindrical form with the normal tangential or scroll type air inlet adjacent one end.
~ hus in a convenient and preferred configura-tion a vacuum cleaner casing comprises a generally cylindrical "low efficiency" c~clone with an inlet for dirty air and concentrically within the low efficiency cyclone a "high efficiency" cyclone~
a passageway being provided to allow air from the low efficiency cyclone to enter an end part of the high efficiency cyclone. Clean air can then be withdrawn centrally from the high efficiency cyclone and exhausted if necessary through a final filterO
- ~a.-In one aspect of the present invention there is provided a vacuum cleaning appliance compris:ing an outer cyclone comprising a bottom and a substan-tially cylindrical cyclone casing extending to and meeting the bottom, the casing having a substantially cylindrical interior wall which acts as a dirt rotation surface and which defines a substantially constant cross-sectional interior for the outer cyclone throughout its length 3 a dirty air air inlet at an upper portion of the outer cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and an outer cyclone air outlet communicating with the interior of the outer cyclone, an inner cyclone disposed concentric with and inside the outer cyclone, the inner cyclone comprising an air inlet at an upper end thereof in air communication through a passage with the air outlet of the outer cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity, and an inner cyclone air outlet communicating with the interior of the inner cyclone as defined by the frusto-conical shaped wall, and means for generating an air flow which passes sequentially through the dirty air inlet, the outer cyclone, the first cyclone air outlet, the passage, the inner cyclone and the inner cyclone air outlet, the air flow rotating around the cylindrical interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone, the outer cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the inner cyclone.
In a further aspect of the present invention there is provided a vacuum cleaning appliance comprising a first cyclone comprising a bottom and a substantially cylindrical cyclone casing extending to and meeting said P~
-3b-bottom, the casing having a substantially cylindrical interior wall which acts as a dirt ro-tation surface and which defines a substantially constant cross-sectional interior for the first cyclone throughout its length, a dirty air air inlet at an upper portion of the first cyclone spaced from the bottom for supplying dirt laden air -tangentially to the interior wall, and a first cyclone air outlet communicating with the interior of the first cyclone a second cyclone comprising an air inlet at an upper end thereof in air communication thro~gh a passage with the air outlet of the first cyclone9 an interior dirt rotational wall of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity, and a second cyclone air outlet communicating with the interior of said second cyclone as defined by the frusto-conical shaped wall, and means for generating an air flow which passes sequentially through the dirty air inlet, the first cyclone, the first cyclone air outlet, the passage, the second cyclone and the second cyclone air outlet~ the air flow rotating around the cylindrical interior wall of the first cyclone and the frusto~conical interior wall of the second cyclone, the first cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the second cyclone.
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A particular embodiment of the invention will now be described b~ wa~ of example and with ref-erence to the accompanying drawings wherein:-Figure 1 is a side sectional view ta~en along the line I - I of Figure 2;
~ igure 2 is a front sectional view t~ken along the line II - II of ~igure 1; and Figure 3 is a section looking upwardly along the line III - III of ~igure 2.
The cleaning appliance illustrated comprises a main casing 1 adapted for use both in the vertical mode and the horizontal mode, the vertical mode being illustrated. The functioning of the appliance will be described with reference to this vertical mode. ht the lo-wer end part o~ the casing a cleaning head 2 is provided, the head 2 comprising a motor driven fan unit 3 and an elongate transversel~ extending brushing member 4 connected to the shaft of the motor bv a belt 5. ~ pipe 6 - 20 upstands along the back of the casing 1 and serves as a handle or for a connection to other suction tools~ Extendlng between pipe 6 and to the upper erd part of the casing is a holder for electric cable 7 and an on/off switch 8 for the appliance.
~he electrical arrangements for the cleaning appli-ance form no part of the presen-t invention and will not be described. ~he appliance in the upright mode runs on wheels 90 Dirty air entering the appliance from behind brushes 4 communicates as can best be seen in ~igure 2 through a square port 'lO with an entry passage 11 for dirty air defined by a part-circular sleeve 12 within the casing (see ~igure 3).
Centrally ~nd coaxially within the casing 1 and slidably fitted in sleeve 12 is the cylindrical casing 13 of the first low efficiency cyclone ; 10 unit. The upper end of the dirty air entrance passage 11 communicates through part 14 with the upper part of casing 13 so as to make a tangential entry and to set up a swirling cyclonic flow of air~
~he high efficiency cyclone unit comprises a frusto-conical body portion 15 and a dependaut cy-lindrical portion 16, the lower end part of which abuts against a support plate 17 on the base of the low efficiency cyclone casing 13. Outside of the ; frusto-conical part and extending to a tangential entry port 18 is an entry pipe 19 to the high efficiency cyclone from the interlor of the lower efficiency cyclone. ~he high efficiency cyclone ; unit is removable upwardly from the low efficiency cyclone unit and flexible bearing seals 20 are provided between the units. The upper end of the high efficiency cyclone communicates with a passage 21 at the side of the cleaner opposite to the dirty air entry passage and defined between sleeve 12 and the cleaner outer casing. ~he lower end part of this passage communicates through the motor fan to exhaust.
~ he operation of the appliance will now be described with reference to -the air flow designated by arrows differently marked to show the successive progress of the dirty air through the interior of the casing and the two cyclone units. ~ rep-resents dirty air~ .air cleaned by the low efficiency cyclone, ~ air cleaned by the high efficiency cyclone, and ~ p finally discharged air. In operation of the device with the rotating brush 4 and the suction developed by the motor fan 3, dirty aircarrying dust and other 0 particles is drawn into the dirty air entry passage he airstream carrying the dirt particles makes a tan~ential entry through port 14 into the upper part of the low efficiency cyclone casing 13 and performs cyclonic swirling movement generally along the line of the arrows and thereby deposits the majority of the dust particles in the lower part of the low efficiency cyclone as indicated at A. The airstream carrying only the finer par-ticles then rises under the influence of the general airflow developed by the fan through pipe 19 and entry port 18 to a tangential entry to the high efficiency cyclone unit where the cyclonic cleaning process is repeated only with higher efficiency and greater particle velocity thereby contriving the deposit of the finer particles at B. The ultimately clean air rises l~der the influence of the air flow to the upper part of the high efficiency cyclone and returns through the clean air exit pipe to the motor fan and exhaust possibly with a final filter.
For discharge of particles the lo~ler and high efficiency cyclone casings are removed upwardly and disengaged from one another. It will be appreciated that when the high efficiency cyclone casing 16 is lifted from its seating on the base of the low efficiency cyclone casing 13 the contents thereof will be deposited so that the cylindrical body holds all the deposited particles. If desired a dispos-able liner can be provided for the lo~ efficiency cyclone casing.
Means not shown may be provided for ma~uall~
throttling the entry or exit pipe to the high efficiency cyclone. If the size of the entry or exit orifice to the cyclone is reduced then suction pressure is reduced but separation efficiency is --enhanced~ For use in the horizontal mode a valve schematically indicated at 22 is provided which is rotatable to close airflo~ from the brushes and to open the air passage to the pipe 6,
DESCRI~ION
~his invention relates to a vacuum suction cleaning appliance and in particular to a portable domestic appliance of the kind described in the published EPC Specification No. 0 018 197.
EPC Specification No. 0 018 197 describes an appliance in which a cleaner head for contacting a dirty surface is connected to the interior of the casing in which an airflow is set up by a motor driven fan. ~he casing contains two cyclone units in series operating successfully to e~tract dirt particles (dust and other extraneous matter) from the airflow therethrough and to deposit the extracted dirt.
A cleaning appliance based on cyclone u~its has the advantage that dust bags are not required as dirt can be discharged from the appliance by removing and separating the cyclones from the sur-rounding casing. Other advantages are that the air discharged from the appliance is substa~tially dust free a d the use of filters as main cleaning elements is avoided.
In the appliance described in the said EPC
patent application each of the two cyclone units has a body of substantiall~ frusto-conical shape, this shape serving to maintain the velocity of the dirt particles swirling therein and hence render the c~clone capable of depositing fine dirt particles of small diameter. Such cyclone units with the means to maintain the velocity of the fine dirt particles will hereinafter be referred to as "high efficiency"
cyclones.
This invention recognises that a vacuum cleaner incorporating only the higher efficiency cyclones necessary to deal with the fine particles does not operate entirely satisfactorily under no~al domestic conditions when dirt particles of larger size and other extraneous objects are sucked into the appli-ance. These larger size particles tend to be retained either perfor~ing the spiral or circular motion in the cyclqne or drif-ting to the cyclone central regions and are not deposited. ~his causes noise and interferes with the efficient operation of the cyclone.
~ ccordingly the present invention proposes incorporating into the air passage upstream, relatively to the inlet for dirty air, o~ the high efficiency cyclone unit a cyclone deliberately constructed ~o be of lower efficiency.
This '~lower efficiency" c~clone though not ultimately capable of dealing effectively with the finest particles 9 i.e. particles of 50 microns diameter or under, carries out a primary cleaning a&tion of the dirty air flow by depositing all but some of these finer particles. The high efficiency cyclone is then left to function in its optimum conditions with comparatively clean air and only particles of very small size.
~ he lower efficiency can be contrived by omitting the frusto-conical formation and construct~
ing for example the cyclone casing of cylindrical form with the normal tangential or scroll type air inlet adjacent one end.
~ hus in a convenient and preferred configura-tion a vacuum cleaner casing comprises a generally cylindrical "low efficiency" c~clone with an inlet for dirty air and concentrically within the low efficiency cyclone a "high efficiency" cyclone~
a passageway being provided to allow air from the low efficiency cyclone to enter an end part of the high efficiency cyclone. Clean air can then be withdrawn centrally from the high efficiency cyclone and exhausted if necessary through a final filterO
- ~a.-In one aspect of the present invention there is provided a vacuum cleaning appliance compris:ing an outer cyclone comprising a bottom and a substan-tially cylindrical cyclone casing extending to and meeting the bottom, the casing having a substantially cylindrical interior wall which acts as a dirt rotation surface and which defines a substantially constant cross-sectional interior for the outer cyclone throughout its length 3 a dirty air air inlet at an upper portion of the outer cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and an outer cyclone air outlet communicating with the interior of the outer cyclone, an inner cyclone disposed concentric with and inside the outer cyclone, the inner cyclone comprising an air inlet at an upper end thereof in air communication through a passage with the air outlet of the outer cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity, and an inner cyclone air outlet communicating with the interior of the inner cyclone as defined by the frusto-conical shaped wall, and means for generating an air flow which passes sequentially through the dirty air inlet, the outer cyclone, the first cyclone air outlet, the passage, the inner cyclone and the inner cyclone air outlet, the air flow rotating around the cylindrical interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone, the outer cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the inner cyclone.
In a further aspect of the present invention there is provided a vacuum cleaning appliance comprising a first cyclone comprising a bottom and a substantially cylindrical cyclone casing extending to and meeting said P~
-3b-bottom, the casing having a substantially cylindrical interior wall which acts as a dirt ro-tation surface and which defines a substantially constant cross-sectional interior for the first cyclone throughout its length, a dirty air air inlet at an upper portion of the first cyclone spaced from the bottom for supplying dirt laden air -tangentially to the interior wall, and a first cyclone air outlet communicating with the interior of the first cyclone a second cyclone comprising an air inlet at an upper end thereof in air communication thro~gh a passage with the air outlet of the first cyclone9 an interior dirt rotational wall of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity, and a second cyclone air outlet communicating with the interior of said second cyclone as defined by the frusto-conical shaped wall, and means for generating an air flow which passes sequentially through the dirty air inlet, the first cyclone, the first cyclone air outlet, the passage, the second cyclone and the second cyclone air outlet~ the air flow rotating around the cylindrical interior wall of the first cyclone and the frusto~conical interior wall of the second cyclone, the first cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the second cyclone.
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A particular embodiment of the invention will now be described b~ wa~ of example and with ref-erence to the accompanying drawings wherein:-Figure 1 is a side sectional view ta~en along the line I - I of Figure 2;
~ igure 2 is a front sectional view t~ken along the line II - II of ~igure 1; and Figure 3 is a section looking upwardly along the line III - III of ~igure 2.
The cleaning appliance illustrated comprises a main casing 1 adapted for use both in the vertical mode and the horizontal mode, the vertical mode being illustrated. The functioning of the appliance will be described with reference to this vertical mode. ht the lo-wer end part o~ the casing a cleaning head 2 is provided, the head 2 comprising a motor driven fan unit 3 and an elongate transversel~ extending brushing member 4 connected to the shaft of the motor bv a belt 5. ~ pipe 6 - 20 upstands along the back of the casing 1 and serves as a handle or for a connection to other suction tools~ Extendlng between pipe 6 and to the upper erd part of the casing is a holder for electric cable 7 and an on/off switch 8 for the appliance.
~he electrical arrangements for the cleaning appli-ance form no part of the presen-t invention and will not be described. ~he appliance in the upright mode runs on wheels 90 Dirty air entering the appliance from behind brushes 4 communicates as can best be seen in ~igure 2 through a square port 'lO with an entry passage 11 for dirty air defined by a part-circular sleeve 12 within the casing (see ~igure 3).
Centrally ~nd coaxially within the casing 1 and slidably fitted in sleeve 12 is the cylindrical casing 13 of the first low efficiency cyclone ; 10 unit. The upper end of the dirty air entrance passage 11 communicates through part 14 with the upper part of casing 13 so as to make a tangential entry and to set up a swirling cyclonic flow of air~
~he high efficiency cyclone unit comprises a frusto-conical body portion 15 and a dependaut cy-lindrical portion 16, the lower end part of which abuts against a support plate 17 on the base of the low efficiency cyclone casing 13. Outside of the ; frusto-conical part and extending to a tangential entry port 18 is an entry pipe 19 to the high efficiency cyclone from the interlor of the lower efficiency cyclone. ~he high efficiency cyclone ; unit is removable upwardly from the low efficiency cyclone unit and flexible bearing seals 20 are provided between the units. The upper end of the high efficiency cyclone communicates with a passage 21 at the side of the cleaner opposite to the dirty air entry passage and defined between sleeve 12 and the cleaner outer casing. ~he lower end part of this passage communicates through the motor fan to exhaust.
~ he operation of the appliance will now be described with reference to -the air flow designated by arrows differently marked to show the successive progress of the dirty air through the interior of the casing and the two cyclone units. ~ rep-resents dirty air~ .air cleaned by the low efficiency cyclone, ~ air cleaned by the high efficiency cyclone, and ~ p finally discharged air. In operation of the device with the rotating brush 4 and the suction developed by the motor fan 3, dirty aircarrying dust and other 0 particles is drawn into the dirty air entry passage he airstream carrying the dirt particles makes a tan~ential entry through port 14 into the upper part of the low efficiency cyclone casing 13 and performs cyclonic swirling movement generally along the line of the arrows and thereby deposits the majority of the dust particles in the lower part of the low efficiency cyclone as indicated at A. The airstream carrying only the finer par-ticles then rises under the influence of the general airflow developed by the fan through pipe 19 and entry port 18 to a tangential entry to the high efficiency cyclone unit where the cyclonic cleaning process is repeated only with higher efficiency and greater particle velocity thereby contriving the deposit of the finer particles at B. The ultimately clean air rises l~der the influence of the air flow to the upper part of the high efficiency cyclone and returns through the clean air exit pipe to the motor fan and exhaust possibly with a final filter.
For discharge of particles the lo~ler and high efficiency cyclone casings are removed upwardly and disengaged from one another. It will be appreciated that when the high efficiency cyclone casing 16 is lifted from its seating on the base of the low efficiency cyclone casing 13 the contents thereof will be deposited so that the cylindrical body holds all the deposited particles. If desired a dispos-able liner can be provided for the lo~ efficiency cyclone casing.
Means not shown may be provided for ma~uall~
throttling the entry or exit pipe to the high efficiency cyclone. If the size of the entry or exit orifice to the cyclone is reduced then suction pressure is reduced but separation efficiency is --enhanced~ For use in the horizontal mode a valve schematically indicated at 22 is provided which is rotatable to close airflo~ from the brushes and to open the air passage to the pipe 6,
Claims (26)
1. A vacuum cleaning appliance comprising an outer cyclone comprising a bottom and a substantially cylindrical cyclone casing extending to and meeting said bottom, said casing having a substantially cylindrical interior wall which acts as a dirt rotation surface and which defines a substantially constant cross-sectional interior for said outer cyclone throughout its length, a dirty air air inlet at an upper portion of said outer cyclone spaced from said bottom for supplying dirt laden air tangentially to said interior wall, and an outer cyclone air outlet communicating with the interior of said outer cyclone, an inner cyclone disposed concentric with and inside said outer cyclone, said inner cyclone comprising an air inlet at an upper end thereof in air communication through a passage with said air outlet of said outer cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from said passage and maintaining its velocity, and an inner cyclone air outlet communicating with the interior of said inner cyclone as defined by said frusto-conical shaped wall; and means for generating an air flow which passes sequentially through said dirty air inlet, said outer cyclone, said first cyclone air outlet, said passage, said inner cyclone and said inner cyclone air outlet, said air flow rotating around said cylindrical interior wall of said outer cyclone and said frusto-conical interior wall of said inner cyclone, said outer cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than said inner cyclone.
2. A vacuum cleaning appliance comprising a first cyclone comprising a bottom and a substantially cylindrical cyclone casing extending to and meeting said bottom, said casing having a substantially cylindrical interior wall which acts as a dirt rotation surface and which defines a substantially constant cross-sectional interior for said first cyclone throughout its length, a dirty air air inlet at an upper portion of said first cyclone spaced from said bottom for supplying dirt laden air tangentially to said interior wall, and a first cyclone air outlet communicating with the interior of said first cyclone, a second cyclone comprising an air inlet at an upper end thereof in air communication through a passage with said air outlet of said first cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from said passage and maintaining its velocity, and a second cyclone air outlet communicating with the interior of said second cyclone as defined by said frusto-conical shaped wall; and means for generating an air flow which passes sequentially through said dirty air inlet, said first cyclone, said first cyclone air outlet, said passage, said second cyclone and said second cyclone air outlet, said air flow rotating around said cylindrical interior wall of said first cyclone and said frusto-conical interior wall of said second cyclone, said first cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than said second cyclone.
3. A portable vacuum cleaning appliance comprising:
(a) an outer cyclone comprising a bottom (13a) and a cyclone casing (13) having a circular cross-section throughout its length extending to and meeting the bottom, the casing having an interior wall which acts as a dirt rotation surface, a dirty air inlet (14) at an upper portion of the first cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and a first cyclone air outlet (19a) communicating with the interior of the first cyclone;
(b) all inner cyclone inside the first cyclone comprising an air inlet (18) at an upper end thereof in air communication through a passage (19) with the air outlet of the outer cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity, and an inner cyclone air outlet (18a) communicating with the interior of the inner cyclone as defined by the frusto-conical shaped wall;
(c) a casing (1) supporting the outer cyclone and mounted on wheels (9);
(d) a floor contacting cleaning head (2) mounted on the casing;
(e) a handle mounted on the casing for moving the appliance across the floor;
(f) an air entry means (11) providing an air flow path from the cleaning head adjacent the floor to the dirty air inlet at the upper portion of the outer cyclone;
(g) an air exit means (21) providing a clean air below path from the inner cyclone air outlet to the casing adjacent the cleaning head; and (h) motor driven means (3) for generating an air flow connected to the air exit means and mounted on the casing, wherein the air passes through the cleaning head, the air entry means, the dirty air inlet, the outer cyclone, the outer cyclone air outlet, the passage, the inner cyclone and the inner cyclone air outlet, the air exit means, the air flow rotating around the interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone, the outer cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the inner cyclone.
(a) an outer cyclone comprising a bottom (13a) and a cyclone casing (13) having a circular cross-section throughout its length extending to and meeting the bottom, the casing having an interior wall which acts as a dirt rotation surface, a dirty air inlet (14) at an upper portion of the first cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and a first cyclone air outlet (19a) communicating with the interior of the first cyclone;
(b) all inner cyclone inside the first cyclone comprising an air inlet (18) at an upper end thereof in air communication through a passage (19) with the air outlet of the outer cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity, and an inner cyclone air outlet (18a) communicating with the interior of the inner cyclone as defined by the frusto-conical shaped wall;
(c) a casing (1) supporting the outer cyclone and mounted on wheels (9);
(d) a floor contacting cleaning head (2) mounted on the casing;
(e) a handle mounted on the casing for moving the appliance across the floor;
(f) an air entry means (11) providing an air flow path from the cleaning head adjacent the floor to the dirty air inlet at the upper portion of the outer cyclone;
(g) an air exit means (21) providing a clean air below path from the inner cyclone air outlet to the casing adjacent the cleaning head; and (h) motor driven means (3) for generating an air flow connected to the air exit means and mounted on the casing, wherein the air passes through the cleaning head, the air entry means, the dirty air inlet, the outer cyclone, the outer cyclone air outlet, the passage, the inner cyclone and the inner cyclone air outlet, the air exit means, the air flow rotating around the interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone, the outer cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the inner cyclone.
4. The appliance of claim 3 wherein the inner cyclone is separated from air flow connection with the outer cyclone except for the inlet to the inner cyclone and wherein the air passes sequentially first through the first outer cyclone and then through the inner cyclone.
5. The appliance of claim 3 wherein the dirt rotational wall of the outer cyclone is cylindrical.
6. The appliance of claim 3 wherein the inner cyclone is a frusto-conical shaped member which defines the frusto-conical shaped interior dirt rotation wall.
7. The vacuum cleaning appliance of claim 3 wherein the cleaning head supports a driven brushing member (4).
8. The vacuum cleaning appliance of claim 3, wherein the outer cyclone is supported on the casing between the air entry means and the air exit means.
9. The vacuum cleaning appliance of claim 3 wherein the inner cyclone further comprises a generally circular cross-sectioned portion (16) which extends to the bottom of the outer cyclone from a frusto-concial shaped member (15) which defines the frusto-conical shaped interior dirt rotation wall and wherein the portion collects dirt from the inner cyclone.
10. The vacuum cleaning appliance of claim 9, wherein the generally circular cross-sectioned portion surrounds one end of the frusto-conical shaped member which projects into the portion.
11. The vacuum cleaning appliance of claim 3, further comprising a cleaning pipe (6), and a valve means (22) for selectively air-flow coupling one of the cleaning head and cleaning pipe to the motor driven means for providing an air flow thereby generating an air flow through one of the cleaning head or cleaning pipe, as selected by the valve means, and through the air entry means to the dirty air inlet.
12. The vacuum cleaning appliance of claim 3 wherein the outer cyclone is separable from the inner cyclone and wherein flexible bearing seals (20) are provided between the cyclones.
13. A portable vacuum cleaning appliance comprising:
(a) an outer cyclone comprising a bottom (13a) and a cyclone casing (13) having a circular cross-section throughout its length extending to and meeting the bottom, the casing having an interior wall which acts as a dirt rotation surface, a dirty air inlet (14) at an upper portion of the outer cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and an outer cyclone air outlet (19a) communicating with the interior of the outer cyclone, the inner cyclone being separated from air flow connection with the outer cyclone except for the air inlet to the second cyclone;
(b) an inner cyclone disposed concentric with and inside said outer cyclone, said inner cyclone comprising an air inlet (18) at an upper end thereof in air communication through a passage (19) with said air outlet of said outer cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from said passage and maintaining its velocity, and an inner cyclone air outlet (18a) communicating with the interior of said inner cyclone above the dirt rotational wall as defined by said frusto-conical shaped wall;
(c) a casing (1) supporting the outer cyclone mounted on wheels (9);
(d) a floor contacting cleaning head (2) mounted on the casing;
(e) a handle mounted on the casing for moving the appliance across the floor;
(f) an entry means (11) providing an air flow path from the cleaning head adjacent the floor to the dirty air inlet at the upper portion of the first cyclone;
(g) an air exit means (21) providing a clean air flow path from the inner cyclone air outlet to the casing adjacent the cleaning head; and (h) motor driven means (3) for generating an air flow connected to the air exit means and mounted on the casing adjacent the cleaning head wherein the air passes sequentially through the cleaning head, the air entry means, and the dirty air inlet, the outer cyclone, the outer cyclone air outlet, the passage, the inner cyclone and the inner cyclone air outlet, the air exit means, the air flow rotating around the interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone, the outer cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the inner cyclone.
(a) an outer cyclone comprising a bottom (13a) and a cyclone casing (13) having a circular cross-section throughout its length extending to and meeting the bottom, the casing having an interior wall which acts as a dirt rotation surface, a dirty air inlet (14) at an upper portion of the outer cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and an outer cyclone air outlet (19a) communicating with the interior of the outer cyclone, the inner cyclone being separated from air flow connection with the outer cyclone except for the air inlet to the second cyclone;
(b) an inner cyclone disposed concentric with and inside said outer cyclone, said inner cyclone comprising an air inlet (18) at an upper end thereof in air communication through a passage (19) with said air outlet of said outer cyclone, an interior dirt rotational wall of frusto-conical shape for receiving an air flow from said passage and maintaining its velocity, and an inner cyclone air outlet (18a) communicating with the interior of said inner cyclone above the dirt rotational wall as defined by said frusto-conical shaped wall;
(c) a casing (1) supporting the outer cyclone mounted on wheels (9);
(d) a floor contacting cleaning head (2) mounted on the casing;
(e) a handle mounted on the casing for moving the appliance across the floor;
(f) an entry means (11) providing an air flow path from the cleaning head adjacent the floor to the dirty air inlet at the upper portion of the first cyclone;
(g) an air exit means (21) providing a clean air flow path from the inner cyclone air outlet to the casing adjacent the cleaning head; and (h) motor driven means (3) for generating an air flow connected to the air exit means and mounted on the casing adjacent the cleaning head wherein the air passes sequentially through the cleaning head, the air entry means, and the dirty air inlet, the outer cyclone, the outer cyclone air outlet, the passage, the inner cyclone and the inner cyclone air outlet, the air exit means, the air flow rotating around the interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone, the outer cyclone being of lower efficiency in removing small particles of dirt from dirt laden air than the inner cyclone.
14. The appliance of claim 13 wherein the inner cyclone is separated from air flow connection with the outer cyclone except for the air inlet to the inner cyclone and wherein the air passes sequentially first through the outer cyclone and then the inner cyclone.
15. The appliance of claim 13 wherein the dirt rotational wall of the outer cyclone is cylindrical.
16. The appliance of claim 13 wherein the inner cyclone is a frusto-conical shaped member which defines the frusto-conical shaped interior dirt rotation wall.
17. The vacuum cleaning appliance of claim 13 wherein the cleaning head supports a driven brushing member (4).
18. The vacuum cleaning appliance of claim 13, wherein the outer cyclone is supported on the casing between the air entry and the air exit means.
19. The vacuum cleaning appliance of claim 13 wherein the inner cyclone further comprises a generally circular cross-sectioned portion (16) which extends to the bottom of the outer cyclone from a frusto-conical shaped member (15) which defines-the frusto-conical shaped interior dirt rotation wall and wherein the portion collects dirt from the inner cyclone
20. The vacuum cleaning appliance of claim 13, wherein the cylindrical portion surrounds one end of the frusto-conical shaped member which projects into the portion.
21. The vacuum cleaning appliance of claim 13, further comprising a cleaning pipe (6), and a valve means (22) for selectively air-flow coupling one of the cleaning head and cleaning pipe to the motor driven means for providing an air flow thereby generating an air flow through one of the cleaning head or cleaning pipe, as selected by the valve means, and through the air entry means to the dirty air inlet.
22. The vacuum cleaning appliance of claim 13 wherein the outer cyclone is separable from the inner cyclone and wherein flexible bearing seals (20) are provided between the cyclones.
23. The vacuum cleaning appliance of claim 3 wherein clean air from the air exit means cools the motor driven means.
24. The vacuum cleaning appliance of claim 13 wherein clean air from the air exit means cools the motor driven means.
25. In a portable vacuum cleaning appliance for picking up dirt mounted on wheels for moving the appliance, the improvement which comprises:
(a) an outer cyclone comprising a bottom (13a) and a casing (131 extending to and meeting the bottom, the casing having an interior wall with a circular cross-section throughout its length and an upper portion spaced from the bottom, a first passage (11) for dirty air inlet at an upper portion of the casing spaced from the bottom leading into said casing and having a port (14) from the first passage for supplying dirt laden air tangentially to and on the interior wall and a second passage (19) for air outlet from the interior of the casing adjacent the upper portion of the casing;
(b) an inner cyclone disposed inside the outer cyclone and having interior and exterior walls with a frusto-conical shape and with a small diameter opening adjacent the bottom of the casing and a larger diameter opening adjacent the upper portion of the casing, the inner cyclone having an inlet opening from said second passage for providing air into the inner cyclone tangentially to the interior wall of the inner cyclone and a third passage (18a) adjacent the upper portion of the casing for outlet of clean air from the inner cyclone, wherein the inner cyclone is separable from the outer cyclone for removal of dirt from both cyclones;
(c) a dependent portion (16) from the small opening of the inner cyclone adjacent the bottom of the outer cyclone for collecting dirt from the inner cyclone;
(d) motor driven means (3) for generating an air flow which passes first through the first passage into the outer cyclone to remove larger dirt particles and then through the second passage to the inner cyclone to remove smaller dirt particles and then is removed through the third passage as clean air; and (e) dirt pick up means (4, 6) connected to the first passage.
(a) an outer cyclone comprising a bottom (13a) and a casing (131 extending to and meeting the bottom, the casing having an interior wall with a circular cross-section throughout its length and an upper portion spaced from the bottom, a first passage (11) for dirty air inlet at an upper portion of the casing spaced from the bottom leading into said casing and having a port (14) from the first passage for supplying dirt laden air tangentially to and on the interior wall and a second passage (19) for air outlet from the interior of the casing adjacent the upper portion of the casing;
(b) an inner cyclone disposed inside the outer cyclone and having interior and exterior walls with a frusto-conical shape and with a small diameter opening adjacent the bottom of the casing and a larger diameter opening adjacent the upper portion of the casing, the inner cyclone having an inlet opening from said second passage for providing air into the inner cyclone tangentially to the interior wall of the inner cyclone and a third passage (18a) adjacent the upper portion of the casing for outlet of clean air from the inner cyclone, wherein the inner cyclone is separable from the outer cyclone for removal of dirt from both cyclones;
(c) a dependent portion (16) from the small opening of the inner cyclone adjacent the bottom of the outer cyclone for collecting dirt from the inner cyclone;
(d) motor driven means (3) for generating an air flow which passes first through the first passage into the outer cyclone to remove larger dirt particles and then through the second passage to the inner cyclone to remove smaller dirt particles and then is removed through the third passage as clean air; and (e) dirt pick up means (4, 6) connected to the first passage.
26. The appliance of claim 25 wherein the inner and outer cyclones are concentric.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8020041 | 1980-06-19 | ||
| GB8020041 | 1980-06-19 | ||
| GB8025960 | 1980-08-08 | ||
| GB8025960 | 1980-08-08 | ||
| GB8030964 | 1980-09-25 | ||
| GB8030964 | 1980-09-25 | ||
| GB8031121 | 1980-09-26 | ||
| GB8031121 | 1980-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1182613A true CA1182613A (en) | 1985-02-19 |
Family
ID=27449184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000380126A Expired CA1182613A (en) | 1980-06-19 | 1981-06-18 | Vacuum cleaning appliance having a plurality of cyclone separators of different efficiencies |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US4826515A (en) |
| EP (1) | EP0042723B1 (en) |
| CA (1) | CA1182613A (en) |
| DE (1) | DE3171910D1 (en) |
| DK (1) | DK152085C (en) |
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| US5267371A (en) * | 1992-02-19 | 1993-12-07 | Iona Appliances Inc. | Cyclonic back-pack vacuum cleaner |
| US5558697A (en) * | 1992-12-08 | 1996-09-24 | Notetry Limited | Dual cyclonic vacuum cleaner |
| US6269518B1 (en) | 1999-12-08 | 2001-08-07 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless vacuum cleaner |
| US6484350B2 (en) | 1999-12-08 | 2002-11-26 | Shell Electric Mfg. (Holdings) Co. Ltd. | Bagless canister vacuum cleaner |
Also Published As
| Publication number | Publication date |
|---|---|
| DK272181A (en) | 1981-12-20 |
| DE3171910D1 (en) | 1985-09-26 |
| US4826515A (en) | 1989-05-02 |
| EP0042723A3 (en) | 1983-06-29 |
| DK152085C (en) | 1989-01-16 |
| DK152085B (en) | 1988-02-01 |
| EP0042723A2 (en) | 1981-12-30 |
| EP0042723B1 (en) | 1985-08-21 |
| US4853011A (en) | 1989-08-01 |
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