EP2514347A1 - Vacuum cleaner turbo brush - Google Patents
Vacuum cleaner turbo brush Download PDFInfo
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- 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
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- EP
- European Patent Office
- Prior art keywords
- turbine
- vacuum cleaner
- housing
- turbo brush
- brush according
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- 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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Abstract
Description
Die vorliegende Erfindung betrifft eine sogenannte Staubsauger-Turbobürste, also ein Staubsaugermundstück mit einer durch eine Turbine angetriebenen Bürsten- oder Borstenwalze für einen Staubsauger, insbesondere einen Staubsauger in einer Ausführung als Bodenstaubsauger, aber auch für sogenannte Handstaubsauger.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.
Turbobürsten sind an sich bekannt und werden zum Beispiel zum Reinigen von Teppichböden oder dergleichen sowie zum Saugen von Teppichen mit festgetretenem Schmutz im Teppichflor verwendet. Zum druckschriftlichen Stand der Technik kann insoweit auf die
Neben Turbobürsten mit Turbinen, die mit der Saugluft angetrieben werden, sind auch Turbobürsten bekannt, bei denen die Turbinen als Überdruckturbinen in einem Nebenluftstrom mit sauberer Umgebungsluft angetrieben werden.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.
Nachteilig bei den bisherigen Konzepten ist für eine Turbine im Hauptluftstrom vor allem ein zumeist reduzierter Wirkungsgrad, der sich daraus ergibt, dass aufgrund der zu erwartenden Schmutzpartikel im Luftstrom nicht mit den sonst möglichen Spaltmaßen zwischen Laufrad und Turbinengehäuse gearbeitet werden kann. Außerdem müssen die Schaufelabstände vergleichsweise groß ausgeführt sein, damit Schmutzpartikel das Laufrad passieren können. Bekannte Überdruckturbinen, die im Nebenluftstrom mit sauberer Umgebungsluft betrieben werden, erfordern möglichst geringe Spaltmasse zwischen Laufrad und Turbinengehäuse um einen ausreichenden Wirkungsgrad zu erzielen. Außerdem ist aufgrund einer im Vergleich zum Widerstandsläufer deutlich höheren Laufraddrehzahl (typisch Faktor vier) ein aufwändigeres Umsetzungsgetriebe zur Übertragung der Antriebsleistung auf die Borstenwalze erforderlich.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. In addition, 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. In addition, due to 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.
Eine Aufgabe der Erfindung besteht darin, eine weitere Ausführungsform einer Turbobürste anzugeben, insbesondere eine Ausführungsform einer Turbobürste mit einer verbesserten Effizienz der in der Turbobürste eingesetzten Turbine.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.
Diese Aufgabe wird mit einer Staubsauger-Turbobürste mit den Merkmalen des Anspruchs 1 oder einem Staubsauger mit einer solchen Staubsauger-Turbobürste gelöst. Dabei ist für die Staubsauger-Turbobürste vorgesehen, dass die Turbine im Nebenluftstrom angeordnet und als Gleichdruckturbine ausgeführt ist.This object is achieved with 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.
Die Anordnung der Turbine im Nebenluftkanal und damit im sich im Betrieb ergebenden Nebenluftstrom verhindert Schmutzeintrag wie er bei einer Anordnung im Hauptluftstrom unvermeidlich ist. Bei der Ausführung als Gleichdruckturbine, weist die Umgebungsluft als Arbeitsmedium vor und nach dem Laufrad den gleichen statischen Druck auf. Zum Antrieb des Laufrads wird demnach ausschließlich die umgewandelte Bewegungsenergie, der dynamische Druck, der eingesaugten Umgebungsluft genutzt. Eine Gleichdruckturbine hat einen Reaktionsgrad von Null, während Überdruckturbinen einen Reaktionsgrad größer Null haben.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. When designed as a constant pressure turbine, 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.
Der Vorteil einer Gleichdruckturbine besteht wegen der fehlenden Druckdifferenz vor und nach dem Laufrad vor allem in der Möglichkeit der weniger genauen Abdichtung zwischen den Schaufeln des Laufrads und dem Turbinengehäuse. Dies vereinfacht die Fertigung und erlaubt eine Herstellung der Einzelkomponenten mit weniger strengen Toleranzen. Weiterhin liegt ein Drehzahlniveau einer Gleichdruckturbine bei gleicher Leistungsabgabe um etwa ein Drittel unter dem Drehzahlniveau einer Überdruckturbine. Dadurch ergibt sich entweder eine geringere Geräuschentwicklung im Betrieb oder eine Möglichkeit zur Fertigungsvereinfachung gegenüber einer Überdruckturbine, weil weniger Augenmerk auf geräuschreduzierende Maßnahmen oder Materialen gerichtet werden muss. Dies führt zu einer leichter und kostengünstiger herzustellenden Turbine oder einer Einheit aus Turbine und einem damit kombinierten Getriebe, denn auch für das Getriebe resultiert zunächst die geringere Drehzahl in einer verminderten Geräuschentwicklung. Schließlich gibt bei gleichem Massenstrom und gleichem Turbinendurchmesser eine Gleichdruckturbine doppelt so viel Leistung ab wie eine Überdruckturbine mit einem Reaktionsgrad von 0,5.The advantage of 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.
Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Dabei verwendete Rückbeziehungen weisen auf die weitere Ausbildung des Gegenstands des Hauptanspruchs durch die Merkmale des jeweiligen Unteranspruchs hin. Sie können auch selbständige Erfindungen enthalten, die eine von den Gegenständen der vorhergehenden Ansprüche unabhängige Gestaltung aufweisen und sind nicht als ein Verzicht auf die Erzielung eines selbständigen, gegenständlichen Schutzes für deren Merkmale zu verstehen. Des Weiteren ist im Hinblick auf eine Auslegung der Ansprüche bei einer näheren Konkretisierung eines Merkmals in einem nachgeordneten Anspruch davon auszugehen, dass eine derartige Beschränkung in den jeweils vorangehenden Ansprüchen nicht vorhanden ist.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.
In einer Ausführungsform ist die Turbine als axial angeströmte Gleichdruckturbine ausgeführt. Dies erlaubt einfache Verhältnisse beim Einpassen in einen Nebenluftkanal, durch den der Nebenluftstrom angesaugt wird. Das Turbinengehäuse kann mit seiner runden Außenkontur in einen ebenfalls runden Abschnitt des Nebenluftkanals eingepasst werden, so dass kantenfreie oder zumindest weitgehend kantenfreie Übergänge zwischen dem Nebenluftkanal und dem Turbinengehäuse und weiter zwischen dem Turbinengehäuse und dem stromaufwärts anschließenden Teil des Nebenluftkanals möglich werden. Zudem ist anders als bei radial angeströmten Turbinen, die eine rechteckige oder quadratische Anströmfläche benötigen, auch eine kantenfreie Gestaltung des Luftkanals selbst möglich, weil zum Beispiel keine Übergange zwischen einem eckigen Abschnitt zur Aufnahme der Turbine und einem daran anschließenden evtl. anders gestalteten Abschnitt erforderlich sind.In one embodiment, 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. In addition, 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 ,
In einer besonderen Ausführungsform weist die Staubsauger-Turbobürste ein der Turbine nachgeordnetes zweistufiges Getriebe, insbesondere in einer Ausführungsform als Riemengetriebe, zum Antrieb der Borstenwalze auf. Das Getriebe erlaubt eine hohe Drehzahl der Borstenwalze mit einer niedrigeren Drehzahl der Turbine als bei einem Direktantrieb der Borstenwalze. Mit einem zweistufigen Getriebe kann die bauartbedingte, im Vergleich zu einer Überdruckturbine geringere Drehzahl einer Gleichdruckturbine kompensiert oder mehr als kompensiert werden. Eine Ausführung als Riemengetriebe erlaubt bei den sich im Betrieb ergebenden Drehzahlen eine weitgehende Vermeidung von Laufgeräuschen.In a particular embodiment, 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. With a two-stage gearbox, 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.
Wenn bei der Turbobürste eine mit einem Laufrad der Turbine drehfest kombinierte Turbinenwelle von einem Wellengehäuse, insbesondere einem einstückigen Wellengehäuse, umgeben ist, fungiert das Wellengehäuse im Bereich eines Übergangs zum Laufrad als Turbulenzen verhinderndes oder reduzierendes Leitelement für die einströmende Umgebungsluft und im Bereich der Turbinenwelle als Ummantelung der Turbinenwelle und zur Aufnahme von Lagerelementen zur Halterung der Turbinenwelle. Wenn das Wellengehäuse im Bereich des Übergangs zum Laufrad auf den kompletten Durchmesser des Laufrades aufgeweitet ist und zum Anströmen des Laufrads Öffnungen aufweist, fungiert dieser Teil des Wellengehäuses zudem als Leitstufe für das Laufrad. Wenn eine solche Leitstufe Teil des Wellengehäuses ist, insbesondere einstückig mit dem restlichen Wellengehäuse verbunden ist, ergeben sich einfache Verhältnisse für die Fertigung des Wellengehäuses und wegen des dann möglichen kantenfreien Übergangs günstige Voraussetzungen für eine laminare, turbulenzenfreie oder turbulenzenarme Umströmung des Wellengehäuses und zwar von der Ummantelung der Turbinenwelle über ein Leitelement, das die einströmende Umgebungsluft weg von der im Zentrum des Nebenluftkanals angeordneten Turbinenwelle und hin zu den Schaufeln des Laufrades lenkt, bis zur Leitstufe.In the case of the turbo brush, when a turbine shaft rotatably combined with an impeller of the turbine is surrounded by a shaft housing, in particular a one-piece shaft housing, 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. If such a 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.
In einer besonderen Ausführungsform ist vorgesehen, dass die Staubsauger-Turbobürste ein das Getriebe umgebendes Getriebegehäuse mit einer Turbinenwellenöffnung und einer Abtriebsriemenöffnung sowie Mitteln zur Kombination mit dem Wellengehäuse aufweist. Das Getriebegehäuse kapselt auch das Getriebe, so dass im Nebenluftstrom oder im Bereich des Nebenluftstroms ein wesentlicher Anteil der beweglichen Komponenten, abgesehen selbstverständlich von dem Turbinenrad, gekapselt sind, so dass einerseits Verschmutzungen aber andererseits auch Turbulenzen auslösende und damit den Wirkungsgrad der Turbine verringernde Luftverwirbelungen vermieden oder reduziert werden.In a particular embodiment it is provided that 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.
In umfangreichen Untersuchungen hat sich ergeben, dass sich besonders günstige Strömungsverhältnisse und damit ein besonders guter Wirkungsgrad erreichen lässt, wenn in der Leitstufe vorgesehene Leitelemente und als Turbinenschaufeln fungierende Zapfen am Laufrad eine bestimmte Geometrie aufweisen. Danach ist für die in der Leitstufe gebildeten Leitelemente im Querschnitt eine in Anströmrichtung zunächst kreisbogenförmigen und danach geraden Kontur vorgesehen. Am Laufrad sind entlang von dessen Umfangslinie gleichmäßig verteilten, aerodynamisch geformten Zapfen vorgesehe, wobei die aerodynamische Form sich durch eine beidseitig parabelförmig begrenzte Querschnittsfläche auszeichnet.Extensive investigations have shown that particularly favorable flow conditions and thus particularly good efficiency can be achieved if guide elements provided in the master stage and cones acting as turbine blades on the impeller have a specific geometry. Thereafter, a direction of flow in the first arc-shaped and then straight contour is provided for the guide elements formed in the leading stage in cross section. On the impeller are provided along the circumferential line uniformly distributed, aerodynamically shaped pin, wherein the aerodynamic shape is characterized by a double-sided parabolic cross-sectional area.
In einer besonderen Ausführungsform ist vorgesehen, dass bei der beidseitig parabelförmig begrenzten Querschnittsfläche der Zapfen des Laufrads an einer in Rotationsrichtung unteren Seitenfläche durch einen weiteren Parabelbogen und einer in Rotationsrichtung oberen Seitenfläche durch einen engeren Parabelbogen begrenzt ist. Eine solche Geometrie macht jeden Zapfen zu einer aerodynamischen Fläche nach Art eines Tragflächenprofils und verbessert damit den Wirkungsgrad der Turbine.In a particular embodiment, it is provided that, in the case of the cross-sectional area bounded on both sides by a parabola, the 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. Such a geometry makes each pin an aerodynamic surface in the manner of a wing profile and thus improves the efficiency of the turbine.
Wenn bei der Staubsauger-Turbobürste mit einem Gehäuse und einem darin gebildeten Hauptluft- und Nebenluftkanal die Turbine im Nebenluftkanal angeordnet ist und der Hauptluftkanal mittig im Gehäuse sowie der Nebenluftkanal seitlich neben dem Hauptluftkanal angeordnet sind, ist eine Konzentration der Saugleistung auf den Hauptluftkanal gewährleistet. Nur ein Teil der Saugleistung führt zum Ansaugen von Umgebungsluft über den Nebenluftkanal. Damit ergibt sich ein Optimum von einerseits hoher Saugleistung über den Hauptluftkanal und hoher Turbinenleistung zum Antrieb der Borstenwalze.If in the vacuum cleaner turbo brush with a housing and a main air and secondary air duct formed therein, 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.
Für ein Gehäuse der Staubsauger-Turbobürste kommt in Betracht, dass dieses zum einen eine Unterschale und mit der Unterschale verbundene Wandungen des Haupt- und Nebenluftkanals, insbesondere mit der Unterschale einstückig verbundene Wandungen, und zum anderen eine Zwischenschale zur Abdeckung des Haupt- und Nebenluftkanals in der Unterschale aufweist. Dies führt zu konstruktiv einfachen Verhältnissen. Die Unterschale oder die Unterschale mit damit einstückig verbundenen Kanalwandungen kann in einem Fertigungsschritt, zum Beispiel als Spritzgussteil, hergestellt werden. Gleiches gilt für die Zwischenschale. Nach dem Anbringen zumindest der Turbine im Nebenluftkanal oder im Bereich eines Einströmbereichs des Nebenluftkanals kann die Zwischenschale in einem einfachen Montageschritt mit der Unterschale kombiniert werden.For a housing of the vacuum cleaner turbo brush comes into consideration that on the one hand a lower shell and connected to the lower shell walls of the main and Side air ducts, in particular with the lower shell integrally connected walls, and on the other hand, an intermediate shell for covering the main and secondary air duct in the lower shell. This leads to structurally simple conditions. 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.
In einer besonderen Ausführungsform weist das Gehäuse der Staubsauger-Turbobürste eine Deckschale auf, in der zumindest eine Zuluftöffnung oder Zuluftöffnungen für die Turbine gebildet sind. Durch die Anordnung der Zuluftöffnungen in der Deckschale, also entfernt von der zu saugenden Oberfläche wird zum einen vermieden, dass mit dem Nebenluftstrom Schmutzpartikel aufgenommen werden, die den Betrieb der Turbine beeinträchtigen können, und zum anderen erreicht, dass sich beim Abheben der Staubsauger-Turbobürste vom Boden kein störendes Aufheulen aufgrund der mit dem Abheben einhergehenden plötzlichen Änderung der Strömungswege ergibt.In a particular embodiment, 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. By arranging the Zuluftöffnungen in the cover shell, so away from the surface to be sucked on the one hand prevents dirt particles are added to the secondary air stream, which can affect the operation of the turbine, and on the other hand, that when lifting the vacuum cleaner turbo brush does not cause any annoying howl from the ground due to the abrupt change in flow paths associated with liftoff.
Wenn die Zuluftöffnungen beidseitig vom Hauptluftkanal in der Deckschale gebildet sind, insbesondere symmetrisch verteilt, ergibt sich für den Wesentlichen, beim Betrieb sichtbaren Teil des Gehäuses ein ansprechendes Äußeres, bei dem die Zuluftöffnung oder eine Gruppe von Zuluftöffnungen in das Design des Gehäuses oder dessen Deckschale einbezogen werden können.If the Zuluftöffnungen are formed on both sides of the main air duct in the cover shell, in particular distributed symmetrically, results for the essential, visible during operation part of the housing an attractive appearance, wherein the supply air or a group of Zuluftöffnungen included in the design of the housing or its cover shell can be.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert. Einander entsprechende Gegenstände oder Elemente sind in allen Figuren mit gleichen Bezugszeichen versehen.An embodiment of the invention will be explained in more detail with reference to the drawing. Corresponding objects or elements are provided in all figures with the same reference numerals.
Das oder jedes Ausführungsbeispiel ist nicht als Einschränkung der Erfindung zu verstehen. Vielmehr sind im Rahmen der vorliegenden Offenbarung zahlreiche Abänderungen oder Modifikationen möglich, insbesondere solche, die z. B. durch Kombination oder Abwandlung von einzelnen, in Verbindung mit den in der allgemeinen Beschreibung, des oder jedes Ausführungsbeispiels sowie den Ansprüchen beschriebenen und in den Zeichnungen enthaltenen Merkmalen oder daraus ersichtlichen Verfahrensschritten für den Fachmann im Hinblick auf die Lösung der Aufgabe entnehmbar sind und durch kombinierbare Merkmale zu einem neuen Gegenstand oder zu neuen Verfahrensschritten oder Verfahrensschrittfolgen führen.The or each embodiment is not to be understood as limiting the invention. Rather, numerous modifications or modifications are possible within the scope of the present disclosure, in particular those which z. B. by combination or modification of individual, in connection with the described in the general description, the or each embodiment and the claims and features contained in the drawings or apparent from the process steps for the skilled in the art with a view to solving the problem and by combinable features lead to a new subject or to new process steps or process steps.
Es zeigen
- Fig. 1
- eine Staubsauger-Turbobürste mit geöffnetem Gehäuse,
- Fig. 2
- eine Turbine der Staubsauger-Turbobürste in perspektivischer, teilweise geschnittener Darstellung,
- Fig. 3
- eine Explosionsdarstellung der Turbine aus
Fig. 2 , - Fig. 4
- Details der Turbine als Schnitt durch deren Laufrad und eine vorgelagerte Leitstufe,
- Fig. 5
- die Staubsauger-Turbobürste aus
Fig. 1 mit im Gehäuse angebrachter Zwischenschale und - Fig. 6
- die Staubsauger-Turbobürste aus
Fig. 1 oderFig. 2 mit geschlossenem Gehäuse.
- Fig. 1
- a vacuum cleaner turbo brush with open housing,
- Fig. 2
- a turbine of the vacuum cleaner turbo brush in perspective, partially cut representation,
- Fig. 3
- an exploded view of the turbine
Fig. 2 . - Fig. 4
- Details of the turbine as a section through its impeller and an upstream Leitstufe,
- Fig. 5
- the vacuum cleaner turbo brush off
Fig. 1 with mounted in the housing intermediate shell and - Fig. 6
- the vacuum cleaner turbo brush off
Fig. 1 orFig. 2 with closed housing.
Im Gehäuse 12, nämlich in der dargestellten Ausführungsform in der Unterschale 14, sind ein Hauptluftkanal 20 und ein Nebenluftkanal 22 gebildet. Im Nebenluftkanal 22 und damit im sich dort im Betrieb der Staubsauger-Turbobürste 10 ergebenden Nebenluftstrom ist eine Turbine 24 angeordnet, die als axial angeströmte Gleichdruckturbine ausgeführt ist. Der Turbine 24 nachgeordnet und von der Turbine 24 angetrieben befindet sich ein Getriebe, in der dargestellten Ausführungsform ein zweistufiges Riemengetriebe 26. Das Riemengetriebe 26 ist seinerseits in an sich bekannter Art zum Antrieb einer Borstenwalze 28 der Staubsauger-Turbobürste 10 vorgesehen. In der Darstellung erkennt man den insoweit vorgesehenen Antriebsriemen 30. In der Darstellung ist tatsächlich das Riemengetriebe 26 nicht erkennbar sondern nur ein dieses umgebendes Getriebegehäuse. Hier und im Folgenden werden das Getriebe und das Getriebegehäuse mit der gleichen Bezugsziffer 26 bezeichnet. Das Getriebegehäuse weist zum Austritt des Antriebsriemens 30 eine Antriebsriemenöffnung und zur Kombination mit der Turbine 24 eine Turbinenwellenöffnung (nicht sichtbar) auf.In the
Der Hauptluftkanal 20 ist mittig im Gehäuse 12 angeordnet. Der Nebenluftkanal 22 befindet sich seitlich neben dem Hauptluftkanal 20. Haupt- und Nebenluftkanal 20, 22 öffnen sich zu einem Saugrohranschluss 32, mit dem in an sich bekannter Art und Weise zum Beispiel ein nicht dargestellter Staubsaugerschlauch (Saugrohr) kombinierbar ist, so dass der vom Staubsaugergebläse (ebenfalls nicht dargestellt) erzeugte Saugluftstrom einen Hauptluftstrom durch den Hauptluftkanal 20 und einen Nebenluftstrom durch den Nebenluftkanal 22 erzeugt. Der Haupt- und der Nebenluftkanal 20, 22 sind durch in der Unterschale 14 gebildete oder mit der Unterschale 14 kombinierbare Wandungen 34 gebildet.
Auf der dem Laufrad 38 abgewandten Seite weist das Lagergehäuse 42 Mittel zum Kombinieren mit einem Gehäuse des Getriebes 26 auf, nämlich in der dargestellten Ausführungsform einen Dichtungsbereich 48. Die Turbinenwelle 40 endet auf der dem Getriebe 26 zugewandten Seite in einer Riemenscheibe 50. Hier weist das Getriebe 26 umgebende Getriebegehäuse (in den Darstellungen nicht sichtbar) eine Turbinenwellenöffnung auf, in welche die Riemenscheibe 50 hineinragt. Weiter weist das Getriebegehäuse Mittel zur Kombination mit dem Lagergehäuse 42 auf, nämlich zum Beispiel eine Dichtung, die die Turbinenwellenöffnung zusammen mit dem Dichtungsbereich 48 des Lagergehäuses 42 verschließt, insbesondere staubdicht verschließt.On the side facing away from the
Auf der dem Laufrad 38 zugewandten Seite ist hinter dem Übergang 44 an das Lagergehäuse 42 das Turbinengehäuse 36 mit einem ersten Teil 51 einer Leitstufe einstückig angeformt oder mit diesem lösbar kombiniert. Ein zweiter Teil 52 der Leitstufe 53 ist auf den Übergang 44 aufgesetzt. Leitstufe 53 und Laufrad 38 werden anhand von
Zusammenfassend lassen sich einzelne Aspekte der vorgeschlagenen Neuerung damit wie folgt herausstellen: Es wird eine Staubsauger-Turbobürste für einen Staubsauger angegeben, die zum Antrieb einer Borstenwalze 28 eine Turbine 24 aufweist, wobei die Turbine 24 in einem Nebenluftkanal 22 und damit im Betrieb in einem Nebenluftstrom angeordnet und als Gleichdruckturbine, insbesondere als axial angeströmte Gleichdruckturbine ausgeführt ist. Insgesamt betrifft die Erfindung oder Ausgestaltungen davon auch einen Staubsauger mit einer Staubsauger-Turbobürste wie hier beschrieben.In summary, some aspects of the proposed innovation can be as follows: It is a vacuum cleaner turbo brush for a vacuum cleaner, which has a
Claims (11)
dadurch gekennzeichnet,
dass die Turbine (24) als Gleichdruckturbine ausgeführt ist.Vacuum cleaner turbo brush (10) with a turbine in the secondary air flow,
characterized,
that the turbine (24) is designed as a constant pressure turbine.
Priority Applications (2)
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EP11401062.2A EP2514347B1 (en) | 2011-04-18 | 2011-04-18 | Vacuum cleaner turbo brush |
US13/448,548 US9084520B2 (en) | 2011-04-18 | 2012-04-17 | Vacuum cleaner turbo-brush |
Applications Claiming Priority (1)
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EP11401062.2A EP2514347B1 (en) | 2011-04-18 | 2011-04-18 | Vacuum cleaner turbo brush |
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EP2514347A1 true EP2514347A1 (en) | 2012-10-24 |
EP2514347B1 EP2514347B1 (en) | 2013-10-23 |
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EP11401062.2A Active EP2514347B1 (en) | 2011-04-18 | 2011-04-18 | Vacuum cleaner turbo brush |
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US (1) | US9084520B2 (en) |
EP (1) | EP2514347B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102015105060A1 (en) * | 2015-04-01 | 2016-10-06 | Vorwerk & Co. Interholding Gmbh | Cleaning device, in particular vacuum cleaner or attachment of a vacuum cleaner |
DE102015109797A1 (en) * | 2015-06-18 | 2016-12-22 | Vorwerk & Co. Interholding Gmbh | Cleaning device as an attachment for a vacuum cleaner, in particular electric carpet brush |
Families Citing this family (4)
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CN105517474B (en) * | 2013-09-10 | 2017-05-24 | 苏州市伟克斯电器有限公司 | Vacuum cleaner nozzle and vacuum cleaner |
DE102014114375A1 (en) * | 2014-10-02 | 2016-04-07 | Vorwerk & Co. Interholding Gmbh | Powered brush as attachment for a vacuum cleaner |
CN106963291B (en) * | 2017-05-17 | 2020-05-22 | 江苏美的清洁电器股份有限公司 | Pneumatic floor brush of dust collector |
CN107007207B (en) * | 2017-05-17 | 2020-08-07 | 江苏美的清洁电器股份有限公司 | Air duct component and dust collector floor brush |
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US2178003A (en) * | 1931-04-22 | 1939-10-31 | Hoover Co | Suction cleaner |
DE654605C (en) * | 1934-03-26 | 1937-12-27 | Elektrolux Akt Ges | Mouthpiece for vacuum cleaners intended for cleaning radiators |
GB201003604D0 (en) * | 2010-03-04 | 2010-04-21 | Dyson Technology Ltd | A vacuum cleaning head |
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2011
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JPS5442855A (en) * | 1978-07-18 | 1979-04-05 | Matsushita Electric Ind Co Ltd | Nozzle of washing carpet |
DE3414862C2 (en) | 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 |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102015105060A1 (en) * | 2015-04-01 | 2016-10-06 | Vorwerk & Co. Interholding Gmbh | Cleaning device, in particular vacuum cleaner or attachment of a vacuum cleaner |
DE102015105060B4 (en) | 2015-04-01 | 2024-01-25 | Vorwerk & Co. Interholding Gmbh | Cleaning device, in particular a vacuum cleaner or attachment of a vacuum cleaner |
DE102015109797A1 (en) * | 2015-06-18 | 2016-12-22 | Vorwerk & Co. Interholding Gmbh | Cleaning device as an attachment for a vacuum cleaner, in particular electric carpet brush |
DE102015109797B4 (en) | 2015-06-18 | 2022-08-25 | Vorwerk & Co. Interholding Gmbh | Cleaning device in the form of a suction nozzle designed as a carpet brush as an attachment for a vacuum cleaner |
Also Published As
Publication number | Publication date |
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EP2514347B1 (en) | 2013-10-23 |
US9084520B2 (en) | 2015-07-21 |
US20120260457A1 (en) | 2012-10-18 |
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