US3220638A - Suction unit, particularly for cleaning apparatus - Google Patents

Suction unit, particularly for cleaning apparatus Download PDF

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Publication number
US3220638A
US3220638A US391218A US39121864A US3220638A US 3220638 A US3220638 A US 3220638A US 391218 A US391218 A US 391218A US 39121864 A US39121864 A US 39121864A US 3220638 A US3220638 A US 3220638A
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US
United States
Prior art keywords
motor
annular
air
suction
flow
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 - Lifetime
Application number
US391218A
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English (en)
Inventor
Petersen Georg Vilhelm
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.)
Fisker and Nielsen AS
Original Assignee
Fisker and Nielsen AS
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 Fisker and Nielsen AS filed Critical Fisker and Nielsen AS
Application granted granted Critical
Publication of US3220638A publication Critical patent/US3220638A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0019—Details of the casing
    • 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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • 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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0042—Gaskets; Sealing means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

  • This invention relates to suction units, particularly for cleaning apparatus, such units comprising an electric m0- tor driven suction fan located in a housing having a first inlet for a primary flow of air generated by the fan, an outlet for said flow of air and a second inlet for an auxiliary flow of air serving for cooling the motor.
  • Suction units of the type concerned may, however, also be used e.g. for pneumatic conveyance of granular thermoplastic materials, and deposits of such materials between the stator and rotor of the motor might result in the complete jamming of the motor whereby the function of the suction unit is interrupted.
  • the invention is characterised in that two stationary annular plates are located intermediate the suction fan and the associated drive motor, coaxially with the motor shaft, said annular plates being shaped so as to define between them an annular diffuser which diffuser is connected to said air outlet, and further in that a circular disc is secured to the motor shaft and extends into the space between said stationary plates with an outwardly decreasing spacing from the plate adjacent said fan to define therewith an annular nozzle.
  • the primary air flow generated by the suction fan and flowing through said annular nozzle produces in the said nozzle a negative pressure which in turn, due to ejector action, generates or increases the flow of coolant air for the motor, which coolant flow is induced through said second inlet and, after having cooled the motor, is united with the primary air flow in the diffuser between the two stationary plates whereafter the combined or united flow of air is discharged through said air outlet.
  • the kinetic energy of the primary flow of air discharged from the suction fan is utilised for creating or ensuring the required cooling of the motor, and the vacuum produced by the flow of air through the annular nozzle ensures effectively, together with the disc secured to the motor shaft, which disc acts as a baflle plate, that foreign matter, such as dust or liquid particles, in the primary flow of air is kept away from the motor.
  • vanes or fan blades on the face of the rotary disc, secured to the motor shaft, which faces the motor, whereby the disc will function as a separate cooling fan for the motor, at the same time providing an effective, friction-free sealing for the motor shaft.
  • the Water suction apparatus illustrated in the drawing comprises a collecting container or receptacle 1 which is mounted on a wheeled frame not shown, and which is closed at its upper end by means of a detachable hood 2.
  • a supporting member 3 for an electric motor consisting of a stator 4 secured to the supporting member 3 and a rotor 5 journalled in two ball bearings 6 and 7 in the supporting member 3.
  • the shaft 8 of the motor extends through the lower ball bearing 7 and carries two axially spaced impcllers 9 and 10 provided with blower vanes.
  • a guide apparatus 11 having suitably formed guide vanes is secured to the hood 2 and disposed between the two impellers 9 and 10, and a further stationary guide apparatus 12 provided with similar guide vanes is disposed above the upper impeller 9.
  • the lower portion of the hood 2 is shaped as a circular cylindrical, downwardly facing suction or induction funnel 13 which is coaxial with the motor shaft 8, and the rotation of the motor 4, 5 produces an air flow through said funnel from the interior of the container 1 through the suction unit 9-12 and out through openings 22 in an intermediate wall 23 within the hood 2. From the interior of the hood 2 the air flow is exhausted to the atmosphere through openings 14 in the lateral wall of the hood 2.
  • the suction eifect thus produced serves for sucking up a mixture of air and water through a nozzle or mouthpiece, not shown, connected with container 1, and the water is collected in the container while the air is exhausted as explained above.
  • the upper stationary guide apparatus 12 is defined by an annular plate 15 which extends inwardly past the inner edges of the guide vanes of the apparatus, and the inner edge zone of the plate 15 is curved smoothly or evenly downwards, as appears from the drawing.
  • a further stationary plate 16 having a corresponding, oppositely directed curvature.
  • An outer portion of the plate 16 again curves upwardly where-by the interspace between the plates 15 and 16 forms, from the narrowest spacing of the plates at 17, an annular diffuser for the above mentioned primary flow of air from the suction unit 9-12. From the divergent end of the diffuser said air passes through the above mentioned openings 22 in the inner wall 23 and finally leaves the apparatus through the openings 14.
  • a flat circular disc 20 is secured to the motor shaft.
  • the outer edge of the disc 20 extends beyond the inner edge of the plate 15 so as to form an annular nozzle 24 together with said plate.
  • the primary air flow generated by the suction unit 9-12 produces, when flowing through the annular nozzle 24, a negative pressure or vacuum which cooperates to create a coolant air flow which is induced separately from the primary air flow through openings 18 in the upper portion of the hood 2.
  • the coolant air flow passes through apertures 19in the motor supporting member 3 and cools the motor, whereupon it is combined or united with the primary air flow in the above mentioned annular diffuser, and the 3 combined air fiow is discharged through the openings 22 and 14.
  • the upper face of the disc 20 is provided with a plurality of upstanding fins 21 serving as vanes or fan blades for increasing the, intensity of the above mentioned flow of coolant air, induced through the openings 18, for the motor 4, 5. Furthermore, the lower face of the plate 20 functions as a bafile plate for catching water drops, if any, entrained by the flow of air through the blower unit 9412 which have not in advance been separated from said flow, and thus provides an extra protection of the motor against the penetration of Water.
  • the arrangement described constitutes an effective, friction-free sealing between the motor and the fan, and the sealing effect is due to the combined action of the negative pressure in the annular nozzle 24, whereby air is prevented from flowing towards the motor, and of the rotary disc 20 secured to and rotating with the motor shaft 8.
  • the cooling fan 20, 21 may be relatively small as it needs only have a capacity sufficient for cooling the motor in case the flow of air generated by the suction unit 912 should drop, wholly or substantially, to nil, for example by closing or heavy throttling of the opening of the above mentioned nozzle or mouth piece associated with the water suction apparatus.
  • the flow of air through the suction unit is so abundant that, it will easily ensure the increase of the flow of coolant air through the motor necessitated by the increased motor load. If the motor is designed so that it can operate without separate cooling in the above mentionedv operational condition where the flow ofair has, been reduced, wholly or substantially, to nil, the blades or vanes 21 maybe entirely omitted.
  • suction unit according to the invention might also be used for other purposes than for cleaning apparatus, for example for the pneumatical conveyance of pulverulent or granular materials, or as a ventilation blower wherein it is important that the vapours or gases sucked out are kept away from the blower motor.
  • a suction unit particularly for suction cleaning apparatus, comprising a housing, an electric motor located within said housing and having a stator and a rotary shaft, fan means secured to said motor shaft, two stationary annular plates located in said housing intermediate said fan means and said motor stator coaxially with said shaft, said annular plates being shaped so as to define between them an annular diffuser, a circular disc secured to said motor shaft intermediate said annular stationary plates and extending outwardly past the inner edge of the plate adjacent said fan means with an outwardly decreasing interspacing from said plate to define therewith an annular nozzle, a first air inlet connected to the suction side of said fan means, a second air inlet connected to the space surrounding said motor stator, and an air outlet connected to the discharge end of said annular diffuser.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Cleaning In General (AREA)
US391218A 1963-10-01 1964-08-21 Suction unit, particularly for cleaning apparatus Expired - Lifetime US3220638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK461263AA DK102822C (da) 1963-10-01 1963-10-01 Sugeaggregat, navnlig til rengoringsapparater.

Publications (1)

Publication Number Publication Date
US3220638A true US3220638A (en) 1965-11-30

Family

ID=8135115

Family Applications (1)

Application Number Title Priority Date Filing Date
US391218A Expired - Lifetime US3220638A (en) 1963-10-01 1964-08-21 Suction unit, particularly for cleaning apparatus

Country Status (7)

Country Link
US (1) US3220638A (enExample)
DE (1) DE1199872B (enExample)
DK (1) DK102822C (enExample)
FR (1) FR1406414A (enExample)
GB (1) GB1036707A (enExample)
NL (2) NL6411088A (enExample)
SE (1) SE305299B (enExample)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175551A1 (enExample) * 1972-03-14 1973-10-26 Moulinex Sa
US4195969A (en) * 1978-01-05 1980-04-01 Clarke-Gravely Corporation Vacuum cleaner
US4518325A (en) * 1983-07-11 1985-05-21 Kingston James E Aerifying device for whirlpool bath or tub
US4623366A (en) * 1985-09-20 1986-11-18 Shop-Vac Corporation Grid element for lid of a cannister type vacuum cleaner
US4797072A (en) * 1987-06-19 1989-01-10 Shop-Vac Corporation Portable electric blower
US4824333A (en) * 1985-10-01 1989-04-25 Rexair, Inc. Air blower assembly for vacuum cleaners
US6226831B1 (en) 1999-08-26 2001-05-08 Shop Vac Corporation Self-evacuating vacuum cleaner
US20040088817A1 (en) * 2002-11-12 2004-05-13 Cochran John R. AC/DC hand portable wet/dry vacuum having improved portability and convenience
US7287301B2 (en) 2003-07-10 2007-10-30 Black & Decker Inc. Utility vacuum
US20090326649A1 (en) * 2007-01-30 2009-12-31 Jms Co., Ltd. Turbo type blood pump
US20100059234A1 (en) * 2008-09-05 2010-03-11 Elkhart Brass Manufacturing Company, Inc. Automatic flow restrictor for firefighting apparatus
US20100162516A1 (en) * 2008-12-31 2010-07-01 Emerson Electric Co. Vacuum Bypass Vent and Vacuums Incorporating Such Bypass Vents
CN104000538A (zh) * 2013-02-27 2014-08-27 天佑电器（苏州）有限公司 清洁工具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534808A (en) * 1948-12-07 1950-12-19 B & R Mfg Company Suction cleaner
US2726807A (en) * 1950-09-28 1955-12-13 Finnell System Inc Vacuum apparatus for water and dirt removal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US591408A (en) * 1897-10-12 Fire-alarm

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534808A (en) * 1948-12-07 1950-12-19 B & R Mfg Company Suction cleaner
US2726807A (en) * 1950-09-28 1955-12-13 Finnell System Inc Vacuum apparatus for water and dirt removal

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175551A1 (enExample) * 1972-03-14 1973-10-26 Moulinex Sa
US4195969A (en) * 1978-01-05 1980-04-01 Clarke-Gravely Corporation Vacuum cleaner
US4518325A (en) * 1983-07-11 1985-05-21 Kingston James E Aerifying device for whirlpool bath or tub
US4623366A (en) * 1985-09-20 1986-11-18 Shop-Vac Corporation Grid element for lid of a cannister type vacuum cleaner
US4824333A (en) * 1985-10-01 1989-04-25 Rexair, Inc. Air blower assembly for vacuum cleaners
US4797072A (en) * 1987-06-19 1989-01-10 Shop-Vac Corporation Portable electric blower
US6226831B1 (en) 1999-08-26 2001-05-08 Shop Vac Corporation Self-evacuating vacuum cleaner
US6249933B1 (en) 1999-08-26 2001-06-26 Shop Vac Corporation Pump having sealless shaft
US6508618B2 (en) 1999-08-26 2003-01-21 Shop-Vac Corporation Pump having dynamic shaft seal
US20040088817A1 (en) * 2002-11-12 2004-05-13 Cochran John R. AC/DC hand portable wet/dry vacuum having improved portability and convenience
US7653963B2 (en) 2002-11-12 2010-02-02 Black & Decker Inc. AC/DC hand portable wet/dry vacuum having improved portability and convenience
US8365350B2 (en) 2002-11-12 2013-02-05 Black & Decker Inc. AC/DC hand portable wet/dry vacuum having improved portability and convenience
US7526833B2 (en) 2002-11-12 2009-05-05 Black & Decker Inc. System having a power tool and an AC/DC hand portable wet/dry vacuum that share a battery pack
US7287301B2 (en) 2003-07-10 2007-10-30 Black & Decker Inc. Utility vacuum
US20080216280A1 (en) * 2003-07-10 2008-09-11 Marshall James D Utility vacuum
US20090326649A1 (en) * 2007-01-30 2009-12-31 Jms Co., Ltd. Turbo type blood pump
US8398382B2 (en) * 2007-01-30 2013-03-19 Jms Co., Ltd. Turbo type blood pump
US20100059234A1 (en) * 2008-09-05 2010-03-11 Elkhart Brass Manufacturing Company, Inc. Automatic flow restrictor for firefighting apparatus
US8844642B2 (en) 2008-09-05 2014-09-30 Elkhart Brass Manufacturing Company, Inc. Automatic flow restrictor for firefighting apparatus
US20100162516A1 (en) * 2008-12-31 2010-07-01 Emerson Electric Co. Vacuum Bypass Vent and Vacuums Incorporating Such Bypass Vents
US10092148B2 (en) 2008-12-31 2018-10-09 Emerson Electric Co. Vacuum bypass vent and vacuums incorporating such bypass vents
CN104000538A (zh) * 2013-02-27 2014-08-27 天佑电器（苏州）有限公司 清洁工具

Also Published As

Publication number Publication date
SE305299B (enExample) 1968-10-21
NL6411088A (enExample) 1965-04-02
GB1036707A (en) 1966-07-20
DE1199872B (de) 1965-09-02
DK102822C (da) 1965-10-11
NL125280C (enExample)
FR1406414A (fr) 1965-07-16

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