EP2514347A1 - Brosse à turbine d'aspirateur - Google Patents

Brosse à turbine d'aspirateur Download PDF

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Publication number
EP2514347A1
EP2514347A1 EP11401062A EP11401062A EP2514347A1 EP 2514347 A1 EP2514347 A1 EP 2514347A1 EP 11401062 A EP11401062 A EP 11401062A EP 11401062 A EP11401062 A EP 11401062A EP 2514347 A1 EP2514347 A1 EP 2514347A1
Authority
EP
European Patent Office
Prior art keywords
turbine
vacuum cleaner
housing
turbo brush
brush according
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.)
Granted
Application number
EP11401062A
Other languages
German (de)
English (en)
Other versions
EP2514347B1 (fr
Inventor
Walter Assmann
Volker Marks
Cornelius Wolf
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to EP11401062.2A priority Critical patent/EP2514347B1/fr
Priority to US13/448,548 priority patent/US9084520B2/en
Publication of EP2514347A1 publication Critical patent/EP2514347A1/fr
Application granted granted Critical
Publication of EP2514347B1 publication Critical patent/EP2514347B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0405—Driving means for the brushes or agitators
    • A47L9/0416—Driving means for the brushes or agitators driven by fluid pressure, e.g. by means of an air turbine

Definitions

  • the present invention relates to a so-called vacuum cleaner turbo brush, so a vacuum cleaner mouthpiece with a driven by a turbine brush or bristle roller for a vacuum cleaner, in particular a vacuum cleaner in an embodiment as a vacuum cleaner, but also for so-called hand vacuum cleaner.
  • Turbo brushes are known per se and are used for example for cleaning carpets or the like and for sucking carpets with festgeandem dirt in carpet pile.
  • a vacuum cleaner mouthpiece with SaugrohranInstitut, sliding sole and rotating brush roller is described.
  • the brush roller is driven by a radially impinged turbine. Downstream of the turbine, a relatively narrow, movable nozzle is provided which concentrically directs the suction air or main air flow passing the nozzle to the impeller or turbine wheel.
  • the turbine is a so-called resistance rotor.
  • turbo brushes In addition to turbo brushes with turbines, which are driven by the suction air, turbo brushes are also known in which the turbines are driven as overpressure turbines in a secondary air flow with clean ambient air.
  • a disadvantage of the previous concepts is for a turbine in the main air flow especially a mostly reduced efficiency, which results from the fact that can not be used with the otherwise possible gaps between impeller and turbine housing due to the expected dirt particles in the air flow.
  • the blade distances must be made comparatively large so that dirt particles can pass through the impeller.
  • Known overpressure turbines which are operated in the secondary air flow with clean ambient air, require the lowest possible gap between impeller and turbine housing to achieve sufficient efficiency.
  • a significantly higher compared to the resistance rotor impeller speed typically factor four
  • a complex conversion gear for transmitting the drive power to the brush roller is required.
  • An object of the invention is to provide a further embodiment of a turbo brush, in particular an embodiment of a turbo brush with improved efficiency of the turbine used in the turbo brush.
  • a vacuum cleaner turbo brush with the features of claim 1 or a vacuum cleaner with such a vacuum cleaner turbo brush. It is provided for the vacuum cleaner turbo brush that the turbine is arranged in the secondary air flow and designed as a constant pressure turbine.
  • the arrangement of the turbine in the secondary air duct and thus in the resulting secondary airflow during operation prevents dirt entry as it is unavoidable in an arrangement in the main air flow.
  • the ambient air as the working medium before and after the impeller has the same static pressure. To drive the impeller, therefore, only the converted kinetic energy, the dynamic pressure, the sucked in ambient air is used.
  • a constant-pressure turbine has a degree of reaction of zero, while overpressure turbines have a degree of reaction greater than zero.
  • a constant pressure turbine is due to the lack of pressure difference before and after the impeller mainly in the possibility of less accurate sealing between the blades of the impeller and the turbine housing. This simplifies the production and allows production of the individual components with less stringent tolerances. Furthermore, a speed level of a constant pressure turbine with the same power output is about one-third below the speed level of a positive pressure turbine. This results either in a lower noise during operation or a way to simplify manufacturing over a positive pressure turbine, because less attention must be paid to noise-reducing measures or materials. This leads to a lighter and less expensive to manufacture turbine or a unit of turbine and a gearbox combined with it, because even for the gear initially results in the lower speed in a reduced noise. Finally, with the same mass flow and the same turbine diameter, a constant pressure turbine delivers twice as much power as a positive pressure turbine with a degree of reaction of 0.5.
  • Embodiments of the invention are the subject of the dependent claims. Relationships used here point to the further development of the subject-matter of the main claim by the features of the respective sub-claim. They may also contain independent inventions having a design independent of the objects of the preceding claims and are not to be understood as a waiver of obtaining independent, objective protection of their characteristics. Furthermore, with a view to an interpretation of the claims in a closer specification of a Feature in a subordinate claim to assume that such a restriction in the respective preceding claims does not exist.
  • the turbine is designed as a co-axial impingement turbine. This allows simple conditions when fitting in a secondary air duct, through which the secondary air flow is sucked.
  • the turbine housing can be fitted with its round outer contour in a likewise round portion of the secondary air duct, so that edge-free or at least largely edge-free transitions between the secondary air duct and the turbine housing and further between the turbine housing and the upstream adjacent part of the secondary air duct are possible.
  • unlike radial turbines which require a rectangular or square inflow, even edge-free design of the air duct itself possible because, for example, no transitions between a square section for receiving the turbine and an adjoining possibly differently shaped section are required ,
  • the vacuum cleaner turbo brush on a turbine downstream two-stage transmission in particular in one embodiment as a belt transmission, for driving the bristle roller.
  • the transmission allows a high speed of the bristle roller at a lower speed of the turbine than in a direct drive of the bristle roller.
  • the design-related, compared to an overpressure turbine lower speed of a constant pressure turbine can be compensated or more than compensated.
  • a version as a belt transmission allows at the resulting speeds in operation, a substantial avoidance of running noise.
  • the shaft housing acts as a turbulence-preventing or reducing guide element for the incoming ambient air and in the area of the turbine shaft in the region of a transition to the impeller Shroud of the turbine shaft and for receiving bearing elements for mounting the turbine shaft. If the shaft housing is widened in the region of the transition to the impeller to the entire diameter of the impeller and has openings for flow of the impeller, this part of the shaft housing also acts as a guide stage for the impeller.
  • baffle is part of the shaft housing, in particular integrally connected to the rest of the shaft housing, simple conditions for the production of the shaft housing and because of then possible edge-free transition favorable conditions for a laminar, turbulence-free or turbulenzenarme flow around the shaft housing and that of the Sheath of the turbine shaft via a guide element, which directs the inflowing ambient air away from the turbine shaft located in the center of the secondary air duct and toward the blades of the impeller, up to the pilot stage.
  • the vacuum cleaner turbo brush has a transmission housing surrounding the transmission with a turbine shaft opening and a driven belt opening and means for combination with the shaft housing.
  • the transmission housing also encapsulates the transmission, so that in the secondary air flow or in the region of the secondary air flow, a significant proportion of the movable components, apart of course from the turbine wheel, are encapsulated, so that on the one hand pollution but also avoids turbulence and thus reducing the efficiency of the turbine reducing air turbulence or reduced.
  • journal of the impeller is delimited by a narrower parabolic arc at a lower side surface in the direction of rotation by a further parabolic arc and an upper lateral surface in the direction of rotation.
  • the turbine is arranged in the secondary air duct and the main air duct are arranged centrally in the housing and the secondary air duct laterally adjacent to the main air duct, a concentration of the suction power is ensured on the main air duct. Only part of the suction power leads to the intake of ambient air via the secondary air duct. This results in an optimum on the one hand high suction power over the main air duct and high turbine power to drive the bristle roller.
  • the lower shell or the lower shell with channel walls integrally connected thereto can be produced in one production step, for example as an injection-molded part. The same applies to the intermediate shell. After attaching at least the turbine in the secondary air duct or in the region of an inflow region of the secondary air duct, the intermediate shell can be combined with the lower shell in a simple assembly step.
  • the housing of the vacuum cleaner turbo brush has a cover shell, in which at least one supply air opening or supply air openings are formed for the turbine.
  • FIG. 1 shows a perspective view, however, schematically simplified a generally designated 10 vacuum cleaner turbo brush with the housing 12.
  • the housing 12 includes a lower shell 14 and a visible only in the following figures intermediate shell 16 and cover shell 18th
  • a main air passage 20 and a secondary air passage 22 are formed in the housing 12, namely in the illustrated embodiment in the lower shell 14, a main air passage 20 and a secondary air passage 22 are formed.
  • a turbine 24 is arranged, which is designed as an axial impinged equal pressure turbine. Downstream of the turbine 24 and driven by the turbine 24 is a transmission, in the illustrated embodiment a two-stage belt transmission 26.
  • the belt transmission 26 is in turn provided in a conventional manner for driving a bristle roller 28 of the vacuum cleaner turbo brush 10.
  • the drive belt 30 provided for that purpose.
  • the belt drive 26 is actually not recognizable, but only a transmission housing surrounding it.
  • the transmission and the transmission housing are designated by the same reference numeral 26.
  • the transmission housing has a drive belt opening for exit of the drive belt 30 and a turbine shaft opening (not visible) for combination with the turbine 24.
  • the main air duct 20 is arranged centrally in the housing 12.
  • the secondary air duct 22 is located laterally next to the main air duct 20.
  • Main and secondary air duct 20, 22 open to a suction pipe 32, with the well-known manner, for example, not shown vacuum cleaner hose (suction) can be combined, so that the Vacuum cleaner fan (also not shown) generated suction air flow a main air flow through the main air passage 20 and a secondary air flow through the secondary air passage 22.
  • the main and secondary air ducts 20, 22 are formed by walls 34 formed in the lower shell 14 or combinable with the lower shell 14.
  • Fig. 2 shows more details of the turbine 24, related to their description and mention Fig. 1 was omitted for reasons of clarity. The turbine 24 is partially cut and shown in perspective.
  • turbine 24 In the turbine 24 is an impinged axial impulse turbine, which is hereinafter referred to as turbine 24 for short.
  • the turbine comprises, in a manner known per se, a turbine housing 36, an impeller 38 and a turbine shaft 40 connected in a rotationally fixed manner to the impeller 38.
  • the turbine shaft 40 is surrounded by a bearing housing 42, which projects without edges from a section in the region of the shaft a side facing the impeller 38 widens and thus forms a transition 44.
  • bearing elements 46 In the interior of the bearing housing 42 are bearing elements 46, so that turbine shaft 40 and bearing elements 46 are protected in operation from contamination. In addition, in this way the attachment of the turbine 24 in the lower shell 14 ( Fig. 1 ) of the housing 10 is facilitated.
  • Such an attachment can namely be limited to the fact that the turbine 24 is used with its turbine housing 36 in a recess provided for this purpose and formed in the lower shell 14 in a secondary air duct 22, which fixes the turbine 24 in the flow direction. With the attachment of the intermediate shell 16 ( Fig. 5 ), the turbine 24 is locked in the auxiliary air duct 22 in total.
  • the bearing housing 42 On the side facing away from the impeller 38, the bearing housing 42 has means for combining with a housing of the transmission 26, namely in the illustrated embodiment, a sealing region 48.
  • the turbine shaft 40 ends on the side facing the gear 26 in a pulley 50.
  • the Gearbox 26 surrounding transmission housing (not visible in the illustrations) on a turbine shaft opening into which the pulley 50 protrudes.
  • the transmission housing has means for combination with the bearing housing 42, namely, for example, a seal which closes the turbine shaft opening together with the sealing region 48 of the bearing housing 42, in particular closes dust-tight.
  • the turbine housing 36 On the side facing the impeller 38, behind the transition 44 to the bearing housing 42, the turbine housing 36 is integrally formed with a first part 51 of a baffle or combined with this releasably. A second part 52 of the master stage 53 is placed on the transition 44. Leitcut 53 and impeller 38 are based on Fig. 4 explained in more detail. Shows before Fig. 3 nor a partially sectioned exploded view of the turbine according to Fig. 2 ,
  • Fig. 4 schematically shows a simplified section of a tangential section through the impeller 38 and the master stage 53.
  • the upward-facing block arrow illustrates the resulting in operation flow direction with ambient air / secondary air.
  • the guide stage has a plurality of guide surfaces 54 and the impeller a plurality of Turbine blades acting pin 56 has.
  • Pins 56 and baffles 54 are, as better illustrated in FIG Fig. 2 or Fig. 3 can be seen evenly distributed over the circumference of the impeller 38 and der Leit matter 53.
  • the geometry of the guide surfaces 54 is such that they initially arc-shaped and then just forward the incoming ambient air to the impeller 38.
  • the pins 56 are aerodynamically shaped, wherein the aerodynamic shape is characterized by a double-sided parabolic cross-sectional area.
  • the cross-sectional area of each pin 56 delimited on both sides is delimited by an upper side surface 58 and an adjoining lower side surface 60 in the direction of rotation (illustrated by the right-pointing, simple arrow).
  • the upper side surface 58 forms a first parabolic arch.
  • the lower side surface 60 forms a second parabolic arc differently shaped compared to the first parabolic arc, wherein the first parabola is narrower than the second parabola. In other words, the lower, second parabola is wider than the upper, first parabola.
  • This geometry is one possibility for realizing a cross-sectional area of the pins 56, which makes them a total aerodynamically effective geometry in the manner of an airfoil.
  • FIG. 5 shows in the same perspective, the vacuum cleaner turbo brush 10 Fig. 1 , Unlike the in Fig. 1 shown situation, the intermediate shell 16 is now mounted in the lower shell 14. This closes with the walls 34 (in Fig. 5 not visible anymore; see. Fig. 1 ) the main and secondary air ducts 20, 22 (in Fig. 5 not visible anymore; see. Fig. 1 ) above. Furthermore, it can be seen that the drive belt 30 (in Fig. 5 not visible anymore; see. Fig. 1 ) is protected by a combined with the transmission housing cover. Of the turbine 24 are in the illustrated, installed in the secondary air duct 22 state nor the master stage 53 ( Fig. 2 ) and the turbine shaft 40 can be seen.
  • the secondary air duct 22 widens in a funnel shape with its walls and the intermediate shell 16 and thus forms an inflow region for the turbine 24.
  • the intermediate shell 16 of the secondary air duct 22 is coupled to the inner volume of the housing 12, so that sucked as a secondary air into the housing 12 incoming ambient air.
  • FIG. 1 shows a vacuum cleaner turbo brush 10 with a housing 12 closed with an attached cover shell 18.
  • supply air openings 62 are formed in the form of two symmetrically distributed groups of supply air openings 62.
  • the secondary air duct 22 is coupled to the internal volume of the housing 12 so that ambient air for the secondary air flow is sucked in when the vacuum cleaner fan and thus resulting suction air flow through the supply air.
  • some aspects of the proposed innovation can be as follows: It is a vacuum cleaner turbo brush for a vacuum cleaner, which has a turbine 24 for driving a bristle roller 28, the turbine 24 in a secondary air duct 22 and thus in operation in a secondary air flow arranged and designed as a constant pressure turbine, in particular as an axial impinged equal pressure turbine.
  • the invention or embodiments thereof also relates to a vacuum cleaner with a vacuum cleaner turbo brush as described herein.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
EP11401062.2A 2011-04-18 2011-04-18 Brosse à turbine d'aspirateur Active EP2514347B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11401062.2A EP2514347B1 (fr) 2011-04-18 2011-04-18 Brosse à turbine d'aspirateur
US13/448,548 US9084520B2 (en) 2011-04-18 2012-04-17 Vacuum cleaner turbo-brush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11401062.2A EP2514347B1 (fr) 2011-04-18 2011-04-18 Brosse à turbine d'aspirateur

Publications (2)

Publication Number Publication Date
EP2514347A1 true EP2514347A1 (fr) 2012-10-24
EP2514347B1 EP2514347B1 (fr) 2013-10-23

Family

ID=44509988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11401062.2A Active EP2514347B1 (fr) 2011-04-18 2011-04-18 Brosse à turbine d'aspirateur

Country Status (2)

Country Link
US (1) US9084520B2 (fr)
EP (1) EP2514347B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015105060A1 (de) * 2015-04-01 2016-10-06 Vorwerk & Co. Interholding Gmbh Reinigungsgerät, insbesondere Staubsauger oder Vorsatzgerät eines Staubsaugers
DE102015109797A1 (de) * 2015-06-18 2016-12-22 Vorwerk & Co. Interholding Gmbh Reinigungsgerät als Vorsatzgerät für einen Staubsauger, insbesondere Elektroteppichbürste

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015035545A1 (fr) * 2013-09-10 2015-03-19 苏州市伟克斯电器有限公司 Buse d'aspirateur et aspirateur
DE102014114375A1 (de) * 2014-10-02 2016-04-07 Vorwerk & Co. Interholding Gmbh Angetriebene Bürste als Vorsatzgerät für einen Staubsauger
CN106963291B (zh) * 2017-05-17 2020-05-22 江苏美的清洁电器股份有限公司 吸尘器风动地刷
CN107007207B (zh) * 2017-05-17 2020-08-07 江苏美的清洁电器股份有限公司 风道部件和吸尘器地刷

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5442855A (en) * 1978-07-18 1979-04-05 Matsushita Electric Ind Co Ltd Nozzle of washing carpet
DE3414862C2 (fr) 1984-04-19 1990-04-19 Miele & Cie Gmbh & Co, 4830 Guetersloh, De
GB2320421A (en) * 1996-09-30 1998-06-24 Daewoo Electronics Co Ltd Air-driven power brush for vacuum cleaner
GB2393383A (en) * 2002-09-24 2004-03-31 Dyson Ltd A vacuum cleaning head
WO2006080383A1 (fr) * 2005-01-31 2006-08-03 Toshiba Tec Kabushiki Kaisha Nettoyeur electrique et corps de bouche d’aspiration

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2178003A (en) * 1931-04-22 1939-10-31 Hoover Co Suction cleaner
DE654605C (de) * 1934-03-26 1937-12-27 Elektrolux Akt Ges Zur Reinigung von Heizkoerpern bestimmtes Mundstueck fuer Staubsauger
GB201003604D0 (en) * 2010-03-04 2010-04-21 Dyson Technology Ltd A vacuum cleaning head

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5442855A (en) * 1978-07-18 1979-04-05 Matsushita Electric Ind Co Ltd Nozzle of washing carpet
DE3414862C2 (fr) 1984-04-19 1990-04-19 Miele & Cie Gmbh & Co, 4830 Guetersloh, De
GB2320421A (en) * 1996-09-30 1998-06-24 Daewoo Electronics Co Ltd Air-driven power brush for vacuum cleaner
GB2393383A (en) * 2002-09-24 2004-03-31 Dyson Ltd A vacuum cleaning head
WO2006080383A1 (fr) * 2005-01-31 2006-08-03 Toshiba Tec Kabushiki Kaisha Nettoyeur electrique et corps de bouche d’aspiration

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015105060A1 (de) * 2015-04-01 2016-10-06 Vorwerk & Co. Interholding Gmbh Reinigungsgerät, insbesondere Staubsauger oder Vorsatzgerät eines Staubsaugers
DE102015105060B4 (de) 2015-04-01 2024-01-25 Vorwerk & Co. Interholding Gmbh Reinigungsgerät, insbesondere Staubsauger oder Vorsatzgerät eines Staubsaugers
DE102015109797A1 (de) * 2015-06-18 2016-12-22 Vorwerk & Co. Interholding Gmbh Reinigungsgerät als Vorsatzgerät für einen Staubsauger, insbesondere Elektroteppichbürste
DE102015109797B4 (de) 2015-06-18 2022-08-25 Vorwerk & Co. Interholding Gmbh Reinigungsgerät in Form einer als Teppichbürste ausgebildeten Saugdüse als Vorsatzgerät für einen Staubsauger

Also Published As

Publication number Publication date
US9084520B2 (en) 2015-07-21
EP2514347B1 (fr) 2013-10-23
US20120260457A1 (en) 2012-10-18

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