DK3047770T3

DK3047770T3 - floor Vacuum Cleaner

Info

Publication number: DK3047770T3
Application number: DK15151740.6T
Authority: DK
Inventors: Ralf Sauer; Jan Schultink
Original assignee: Eurofilters Holding Nv
Priority date: 2015-01-20
Filing date: 2015-01-20
Publication date: 2017-07-03
Also published as: AU2015378044A1; CN107205595A; EP3047770A1; RU2667882C1; US20180008107A1; WO2016116219A1; CN107205595B; ES2624496T3; PL3047770T3; EP3047770B1; AU2015378044B2

Description

The present invention relates to a canister vacuum cleaner.

Vacuum cleaners are available in a great number of different configurations and construction types. Among the best known construction types there are upright vacuum cleaners, hand-held vacuum cleaners and canister vacuum cleaners.

An upright vacuum cleaner comprises a movable base unit above which an upper body comprising a dust collection container is arranged, the two parts being pivotable relative to each other. The base unit has typically provided therein an electrically driven brush. An upright vacuum cleaner is shown e.g. in EP 2 030 551. Such vacuum cleaners are sometimes also referred to as brush/beating vacuum cleaners.

Hand-held vacuum cleaners comprise a housing with a motor-driven fan and a dust collection chamber. A suction tube extends from one side of the housing, the end of said suction tube having arranged thereon a floor nozzle. The other side of the housing has arranged thereon a handgrip, optionally provided on a rod.

Canister vacuum cleaners comprise a housing supported on rollers and/or skids. The housing has arranged therein a dust collecting container, in which a filter bag is provided. A floor nozzle is connected to the dust collecting chamber via a suction tube and a suction hose. In the case of conventional canister vacuum cleaners, the housing has additionally arranged therein a motor fan unit, which generates a negative pressure in the dust collecting container. When seen in the air flow direction, the motor fan unit is therefore arranged downstream of the floor nozzle, the suction tube, the suction hose as well as the dust collecting container and the filter bag, respectively. Since the air flowing through such motor fan units is purified air, the latter are sometimes also referred to as “clean air motors”.

In particular in former times, there were also vacuum cleaners in which the sucked-in dirty air was conducted directly through the motor fan and into a dust bag that adjoined the latter directly. Examples of such vacuum cleaners are shown in US 2,101,390, US 2,036,056 and US 2,482,337. Today, these types of vacuum cleaners are no longer very common.

Such dirty air motor fans are also referred to as “dirty air motors” or “direct air motors”. The use of such dirty air motors is also described in documents GB 554 177, US 4,644,606, US 4,519,112, US 2002/0159897, US 5,573,369, US 2003/0202890 or US 6,171,054. CA 2 498 435 discloses a vacuum system comprising a fan with a pick-up hose and a discharge hose so as to convey materials into a container supported on wheels. The fan comprises a housing having a blower arranged therein. The hose enters the housing axially along the blower axis so that air is drawn into the center of the blower and discharged tangentially through the discharge duct.

Against this background, it is the object of the present invention to provide an improved canister vacuum cleaner.

This object is achieved by the subject matter of claim 1. According to the present invention, a canister vacuum cleaner is provided, which comprises a dust collection unit supported on rollers and/or skids, a suction hose, a suction tube and a floor nozzle, wherein the floor nozzle is in fluidic communication with the dust collection unit via the suction tube and the suction hose, wherein the dust collection unit comprises a dust collector, wherein the dust collection unit comprises a motor fan unit for sucking in a flow of air through the floor nozzle, wherein the motor fan unit is arranged such that a flow of air sucked in through the floor nozzle, the suction tube and the suction hose passes through the motor fan unit and flows into the dust collector, wherein the dust collection unit comprises a housing and the motor fan unit is arranged on or within the housing, wherein the dust collector is arranged within the housing. A dirty air motor or direct air motor is thus used in an advantageous manner in a canister vacuum cleaner. The canister vacuum cleaner according to the present invention allows to achieve, also with little motor power, a high volumetric flow rate. A dirty air motor has e.g. a maximum speed of less than 30,000 rpm and an electrical input power of less than 900 W.

When seen in the direction of air flow, the floor nozzle, which is sometimes also referred to as “suction nozzle”, is arranged upstream of the suction tube, the suction tube is arranged upstream of the suction hose and the suction hose is arranged upstream of the dust collection unit. The air sucked in by means of the motor fan unit flows, in the following sequence, through the floor nozzle, through the suction tube and through the suction hose into the dust collection unit. The air is thus conducted through the motor fan unit into the dust collector. It follows that the dust collection unit has the motor fan unit arranged fluidically upstream of the dust collector. Due to the fluidic connection, a continuous flow of air through the floor nozzle, the suction tube and the suction hose into the dust collection unit, and in particular through the motor fan unit into the dust collector, is guaranteed.

Surprisingly enough, it turned out that dirty air motors can be used in an advantageous manner also in canister vacuum cleaners, in particular for conveying sucked-in dirty air into a downstream dust collector.

Other than in the case of conventional canister vacuum cleaners, where, during operation, a negative pressure prevails in the dust collection unit and the dust collection chamber, respectively, the canister vacuum cleaner according to the present invention is configured such that an excess pressure prevails in the dust collection unit and its housing. In this way, the wall thicknesses of the dust collection unit can be reduced and a smaller number of reinforcing elements (such as reinforcing ribs) can be used, or the use of such elements can even be avoided completely.

The housing may comprise a housing wall, which is especially made of plastic.

Arranging the dust collector within the housing of the dust collection unit and arranging the motor fan unit on or in the housing allows a compact structural design of the dust collection unit and thus of the canister vacuum cleaner in its entirety.

The motor fan unit may (in particular during operation of the canister vacuum cleaner) be arranged over or above the dust collector or on the same level as the dust collector. It follows that the motor fan unit is especially not arranged below the dust collector. Therefore, the dirty air need not, or only to a minor extent be conveyed through the motor fan unit against the force of gravity.

The motor fan unit may comprise a radial fan, in particular a single-stage radial fan. In a radial fan, air is sucked in parallel to or axially to the drive axle of the fan wheel and deflected, in particular by approximately 90°, through the rotation of the fan wheel and is then radially blown out.

When the canister vacuum cleaner is in operation, the rotation axis of the radial fan may be oriented perpendicular, or at an angle of not more than 60°, in particular of not more than 45°, relative to the perpendicular direction.

The motor fan unit may be arranged on the housing. In particular the dust collector may be arranged below or on the same level as the motor fan unit, when the canister vacuum cleaner is in operation.

The motor fan unit may be configured such that it generates, with an electrical input power of less than 900 W according to DIN EN 60312-1 using aperture 8, a volumetric flow rate of more than 30 l/s, especially of more than 40 l/s, and in particular of more than 50 l/s. Alternatively or additionally, the motor fan unit may be configured such that it generates, with an electrical input power of less than 600 W according to DIN EN 60312-1 using aperture 8, a volumetric flow rate of more than 25 l/s, especially of more than 30 l/s and in particular of more than 40 l/s. Alternatively or additionally, the motor fan unit may be configured such that it generates, with an electrical input power of less than 300 W according to DIN EN 60312-1 using aperture 8, a volumetric flow rate of more than 15 l/s, especially of more than25 l/s and in particular of more than 30 l/s. A particularly efficient canister vacuum cleaner is obtained in this way.

The air data of a vacuum cleaner and of a motor fan unit, respectively, are determined according to DIN EN 60312-1:2014-01. Reference is especially made to section 5.8. The measuring device type B according to section 7.3.7.3 is here used. If a motor fan unit having no vacuum cleaner housing is measured, said measuring device B will be used also in this case. As regards possibly required adaptors for connection to the measurement chamber, the statements made under 7.3.7.1 apply.

Instead of the term "flow of air" according to DIN EN 60312-1 also the terms "volumetric flow” and "suction air stream” are used.

The floor nozzle may comprise a base plate with a base surface which, when the canister vacuum cleaner is in operation, faces the surface to be vacuum cleaned, the base plate being provided with at least one air flow channel, which extends parallel to the base surface, with an opening that is laterally provided in the base plate. In particular, the base surface of the base plate may rest on the surface to be vacuum cleaned, when the canister vacuum cleaner is in operation, or it may be spaced apart from said surface, e.g. by means of a bristle strip.

The base plate is also referred to as nozzle sole. The floor nozzle has a suction opening for establishing a fluidic connection to the motor fan unit. This suction opening is in fluidic communication with the at least one air flow channel. Through the at least one, and especially through one or a plurality of air flow channels, the contact pressure of the floor nozzle is adjusted in an advantageous manner, and good suction power is achieved. The openings provided laterally in the base plate are provided transversely to the intended direction of movement of the floor nozzle. One or a plurality of air flow channels may be provided from one side of the base plate to the opposite side of the base plate (each transversely to the direction of movement). In the case of such continuous air flow channels, one respective opening per channel is provided on both (opposed) sides of the base plate.

The suction tube may have a diameter in a range of 25 mm to 50 mm, especially of 30 mm to 45 mm, and in particular of 35 mm to 45 mm, and/or a length in a range of 600 mm to 1200 mm. The suction tube may be configured such that it is rigid, in particular such that, when used as intended, it cannot be deformed by a user. The suction tube may consist, partly or fully, of plastic or of metal.

The suction hose may have a diameter in a range of 25 mm to 50 mm, especially of 30 mm to 45 m, and in particular of 35 mm to 45 mm, and/or a length in a range of 1000 mm to 2500 mm. The suction hose may be configured such that it is flexible, in particular such that it is deformable by a user, when used as intended. The suction hose may consist partly or fully of plastic material. In particular, it may comprise a plastic wall and/or a reinforcement made of metal (e.g. a spiral wire).

The suction tube and/or the suction hose may have a constant or a variable diameter along their respective length. In particular, the suction tube and/or the suction hose may be conical in shape, the diameter narrowing preferably towards the floor nozzle. The above specified diameters refer in particular to the smallest diameter of the suction tube and/or the suction hose.

The dust collection unit may be configured such that and/or the motor fan unit may be arranged such that contacting the fan wheel of the motor fan unit with a test probe according to IEC/EN 60335 through the floor nozzle will be impossible. In this respect, section 8 of the version DIN EN 60335-1:2012-10 is referred to. The test probe used should in particular be test probe B.

This reduces the risk of damage that may be caused to the motor fan unit and the risk of injuries that may be caused when the floor nozzle is touched with the motor running.

The canister vacuum cleaner may be a bag-type vacuum cleaner, in particular with a filter area of at least 800 cm2. A bag-type vacuum cleaner is a vacuum cleaner in which the sucked-in dust is separated and collected in a vacuum cleaner filter bag. The canister vacuum cleaner may in particular be a bag-type vacuum cleaner for disposable bags.

The term filter area of a vacuum cleaner filter bag stands for the whole area of the filter material located between or within the edge-side seams (e.g. weld seams or bond seams). In this respect, also possibly existing lateral pleats or surface pleats should be taken into account. The area of the bag filling opening or inlet opening (including a seam surrounding this opening) is not part of the filter area.

The vacuum cleaner filter bag may be a flat bag or a filter bag having a block bottom. A flat bag is defined by two sidewalls of filter material, which are connected to one another along their peripheral edges (e.g. by means of welding or bonding). One of the two sidewalls may have provided therein the bag filling opening or inlet opening. The lateral surfaces or sidewalls may each have a rectangular basic shape. Each sidewall may comprise one or a plurality of layers of a nonwoven and/or of a nonwoven fabric.

The canister vacuum cleaner in the form of a bag-type vacuum cleaner may comprise a vacuum cleaner filter bag, the vacuum cleaner filter bag being configured in the form of a flat bag and/or a disposable bag.

The bag wall of the vacuum cleaner filter bag may comprise one or a plurality of layers of a nonwoven and/or one or a plurality of layers of a nonwoven fabric. In particular, it may comprise a laminate consisting of one or a plurality of layers of a nonwoven and/or of one or a plurality of layers of a nonwoven fabric. This kind of laminate is described e.g. in WO 2007/068444.

The term nonwoven fabric is understood in the sense of the standard DIN EN ISO 9092:2010. In this context, in particular film and paper structures, especially filter paper, are not regarded as a nonwoven fabric. A “nonwoven” is a structure of fibers and/or endless filaments or short-fiber yarns which have been formed into an area-measured material by some kind of process (except for the interlacing of yarns, as in a woven fabric, knotted fabric, knitted fabric, lace or tufted fabric), but not connected to one another by some kind of process. Through a connecting process, a nonwoven is converted into a nonwoven fabric. The nonwoven or the nonwoven fabric may be dry laid, wet laid or extruded.

The canister vacuum cleaner may comprise an exhaust filter, in particular an exhaust filter having a filter area of at least 800 cm2. The exhaust filter may especially be configured as a pleated or folded filter. Thus, a large surface area for a smaller base area can be achieved. The exhaust filter may be provided in a holder of the type described e.g. in European patent application No. 14179375.2. Such exhaust filters allow the use of vacuum cleaner filter bags having little separation efficiency, e.g. single-layer vacuum cleaner filter bags. A vacuum cleaner filter bag having little separation efficiency may e.g. be a bag in the case of which the filter material of the bag wall consists of a spunbond having a grammage of 15 g/m2 to 100 g/m2. The vacuum cleaner filter bag may thus especially be configured as a single-layer filter bag. Alternatively, a bag may e.g. be used, in the case of which the filter material of the bag wall consists of a laminate comprising a spunbond, a meltblown material and a further spunbond (SMS).

Alternatively, the canister vacuum cleaner may be a bagless vacuum cleaner, in particular a vacuum cleaner including an exhaust filter of the type described hereinbefore, which has a filter area of at least 800 cm2. A bagless vacuum cleaner is a vacuum cleaner in which the sucked-in dust is separated and collected without any vacuum cleaner filter bag. In this case, the dust collection unit may comprise an impact separator or a centrifugal force separator or cyclone.

The above-described canister vacuum cleaners may comprise a second motor fan unit. The second motor fan unit may be a dirty air motor or a clean air motor (as described above).

Especially in the case of a dirty air motor, the second motor fan unit may be arranged e.g. between the suction tube and the first motor fan unit such that a sucked-in flow of air will flow through the second motor fan unit into the first motor fan unit and then into the dust collector. In particular, the second motor fan unit may be arranged fluidically directly upstream of the first motor fan unit.

Especially in the case of a clean air motor, the second motor fan unit may be arranged fluidically downstream of the dust collection unit.

The first and the second motor fan units may have an identical electrical input power or different electrical input powers. The electrical input power of each motor fan unit may especially lie between 50 and 400 W. The sum of the electrical input powers of both motor fan units may especially be not higher than 700 W.

It turned out that the use of a second, supporting motor fan unit has a positive influence on the clogging behavior of a vacuum cleaner filter bag and that a high volumetric flow rate can be achieved. This leads to good dust uptake properties of the floor nozzle.

In principle, the floor nozzle may be an active or a passive floor nozzle. An active floor nozzle comprises a brush roller (which is sometimes also referred to as beater brush and/or rotating brush) in the suction opening. The brush roller may be adapted to be driven by an electric motor. A passive floor nozzle does not have any brush roller.

The above described canister vacuum cleaners allow to achieve, on the basis of their overall structural design, a very good efficiency and suction power even with a passive floor nozzle, i.e. without any brush roller. The use of passive floor nozzles leads to a simpler structural design, thus reducing also the weight of the floor nozzle, whereby handling will be simplified.

Additional features will be described with reference to the figures, in which

Fig. 1 shows a first embodiment of a canister vacuum cleaner,

Fig. 2 shows a second embodiment of a canister vacuum cleaner,

Fig. 3 shows a third embodiment of a canister vacuum cleaner.

Fig. 1 illustrates schematically an example of a canister vacuum cleaner 1. The canister vacuum cleaner 1 shown comprises a dust collection unit 2, which is supported on rollers 3, and is thus rollably movable. The dust collection unit 2 has connected thereto a suction hose 4, which, in turn, is connected to a suction tube 5. The suction hose 4 comprises a flexible material that is deformable, in particular during operation. The material used may e.g. be plastic. The hose may be connected to the dust collection unit 2 such that it is releasable therefrom in a nondestructive or in a destructive manner.

The suction tube 5 is configured such that it is rigid, so that, when used as intended, it cannot be deformed by a user. The material of the suction tube 5 may be plastic or metal. The connection between the suction tube and the suction hose may be configured such that it is releasable in a non-destructive or in a destructive manner. The suction tube 5 has additionally secured thereto a handgrip 6.

The canister vacuum cleaner 1 additionally comprises a floor nozzle 7 connected to the suction tube 5.

The dust collection unit 2 comprises a housing 8, which is here shown schematically in a cross-sectional view and which has a motor fan unit 9 arranged thereon. From the motor fan unit 9 a tube section 10 leads into the interior of the housing 8. Within the housing 8 a vacuum cleaner filter bag 11 is arranged, said vacuum cleaner filter bag defining the dust collector. The vacuum cleaner filter bag may removably be secured in position in the interior of the housing in a conventional manner, e.g. by means of a retaining plate.

It follows that, in the arrangement shown, a continuous fluidic connection to the dust collector 11 is established through the floor nozzle 7, the suction tube 5, the suction hose 4, the motor fan unit 9 and the tube section 10. The motor fan unit 9 is here arranged between the suction hose 4 and the dust collector 11, so that dirty air sucked in through the floor nozzle will pass through the motor fan unit 9 (especially via the tube section 10) and flow into the vacuum cleaner filter bag 11.

The motor fan unit 9 is therefore a dirty air motor. It is, in particular, a motor fan unit comprising a radial fan. The motor fan unit comprises a fan wheel whose axis is, when the vacuum cleaner is used as intended, tilted relative to the surface to be vacuum cleaned and to the intended direction of movement of the floor nozzle and is thus also tilted relative to the perpendicular direction. The angle between the perpendicular direction and the fan wheel axis is less than 45°, so that the fan wheel axis is not arranged parallel to the surface to be vacuum cleaned and to the intended direction of movement.

The fan diameter may range from 60 mm to 160 mm. For example, a motor fan unit of the firm of AMETEC, Inc. may be used, which is also used in Soniclean upright vacuum cleaners (e.g. SONICLEAN VT PLUS).

The motor fan unit of the vacuum cleaner SONICLEAN VT PLUS was characterized according to DIN EN 60312-1:2014-01 as explained above. The motor fan unit was measured without a vacuum cleaner housing. As regards necessary adaptors for connection to the measurement chamber, the statements made under 7.3.7.1. apply. The Table shows that high volumetric flow rates are accomplished at low speeds and small input power.

During operation, air is sucked in through the motor fan unit 9. The flow of air enters the canister vacuum cleaner 1 through an opening of the floor nozzle 7 and flows through the suction tube 5 and the suction hose 4 into the motor fan unit 9. Due to the fact that - when seen in the direction of air flow - the motor fan unit 9 is arranged upstream of the dust collector 11 (in the form of a vacuum cleaner filter bag), an excess pressure prevails in the housing 8 as well as in the dust collector 11.

In conventional vacuum cleaners, the motor fan unit is arranged in the dust collection unit downstream of the dust collector, e.g. the vacuum cleaner filter bag, when seen in the direction of air flow, and this has the effect that in particular the housing of the dust collection unit is subjected to a negative pressure. In order to avoid deformation of the housing through said negative pressure, said housing must typically be reinforced, e.g. by means of suitable reinforcing ribs. In the case of the configuration illustrated in Fig. 1, this is not necessary or only necessary to minor extent due to the excess pressure prevailing in the housing 8.

In the example shown in Fig. 1, the vacuum cleaner is a bag-type vacuum cleaner. This means that the dust collection unit 2 has arranged therein a vacuum cleaner filter bag 11 in which the sucked-in dirt and dust are separated. This vacuum cleaner filter bag may, in particular, be a flat bag whose bag walls comprise one or a plurality of layers of a nonwoven and/or of a nonwoven fabric. The vacuum cleaner filter bag is configured as a disposable bag.

Especially when single-layer vacuum cleaner filter bags are used, in the case of which the bag wall consists e.g. of precisely one layer of nonwoven fabric in the form of a spunbond, the use of an exhaust filter will be of advantage. By means of the exhaust filter, fine dust, which has not been separated in the vacuum cleaner filter bag, can be filtered out. Such an exhaust filter may have an area of at least 800 cm2. It may especially be configured as a pleated or folded filter, so as to have a large surface area for a smaller base area (smaller than the surface area).

Due to the fact that the motor fan unit 9 is arranged at and on the housing 8, a compact structural design of the dust collection unit 2 can be accomplished. In the example shown, the motor fan unit is arranged above the dust collector 11.

The suction hose 4 has typically a diameter in a range of 25 mm to 50 mm and a length in a range of 1000 mm to 2500 mm. The suction tube 5 has typically a diameter in a range of 25 mm to 50 mm and a length in a range of 600 mm to 1200 mm.

The suction tube 5 is configured such that it is rigid, the suction hose 4 is configured such that it is flexible.

Fig. 2 shows schematically an alternative embodiment of a canister vacuum cleaner 1, in the case of which like elements are provided with the same reference numerals as in Fig. 1. Also in the example shown in Fig. 2, the motor fan unit 9 is arranged directly at and on the housing 8.

In this case, the rotation axis of the fan wheel of the motor fan unit 9 is arranged perpendicularly, i.e. vertically (in particular vertically relative to the surface to be vacuum cleaned), when the vacuum cleaner is used as intended. It follows that, in this example, the fan wheel rotates in a plane parallel to the surface to be vacuum cleaned.

The sucked-in air exits the suction hose 4 and enters the motor fan unit 9, from where it flows into the tube section 10 and subsequently into the vacuum cleaner filter bag 11. Hence, an excess pressure prevails in the tube section 10 and in the housing 8.

Also the example shown in Fig. 2 is a bag-type vacuum cleaner. Alternatively, the canister vacuum cleaner 1 may, as schematically illustrated in Fig. 3, also be a bagless vacuum cleaner, in the case of which the dust collection unit 2 comprises a centrifugal force separator or cyclone, in which the sucked-in dirt and dust particles are separated by means of centrifugal force. Alternatively, the bagless vacuum cleaner may also be configured as an impact separator.

The centrifugal force separator or cyclone comprises a housing 8 at and on which the motor fan unit 9 is arranged.

Especially in the case of bagless vacuum cleaners, the dust collection unit is provided with an exhaust filter by means of which fine dust that has not been separated in the centrifugal force separator is filtered out. This exhaust filter may have an area of at least 800 cm2. It may especially be configured as a pleated or folded filter, so as to have a large surface area for a smaller base area. The exhaust filter may here be provided in a holder of the type described in European patent application No. 14179375.2.

In addition to the single motor fan unit used in the examples shown, the canister vacuum cleaner may also be provided with a second, supporting motor fan unit. It turned out that, in comparison with the use of a single motor fan unit, the use of two motor fan units can lead to lower suction power losses during operation of the canister vacuum cleaner, even if the sum of the electrical input powers of the two motor fan units is equal to the electrical input power of the single motor fan unit.

The second motor fan unit may be configured as a dirty air motor and may be arranged fluidical-ly (directly) upstream of the first motor fan unit and thus upstream of the dust collection unit, so that dirty air will flow through the second motor fan unit. The two motor fan units may have an identical electrical input power or different electrical input powers.

Alternatively, the second motor fan unit may be configured as a clean air motor and may be arranged fluidically downstream of the dust collection unit. For example, a motor fan unit of the firm of Domel, type designation 467.3.601-4 (obtainable from Domel, d.o.o. Otoki 21, 4228 Zelezniki, Slovenija), may be used. Neither of the two embodiments require the provision of a brush roller (e.g. a beater brush and/or a rotating brush) on or in the floor nozzle 7.

Claims

A vacuum cleaner (1) comprising a dust collection device (2) mounted on rollers (3) and / or sliding rails, a suction hose (4), a suction pipe (5) and a floor nozzle (7), the floor nozzle via the suction pipe and the suction hose. is fluidly connected to the dust collecting device, the dust collecting device comprising a dust separator (11), the dust collecting device comprising a motor blower heater (9) for suctioning an air flow through the floor nozzle, the motor blower unit being arranged in such a way that an air flow sucked in through the floor nozzle and the suction hose, flows through the engine blower assembly and into the dust separator, where the dust collection device comprises a housing and the engine blower assembly is disposed on or in the housing where the dust separator is housed.

The floor vacuum cleaner according to claim 1, wherein the motor blower unit is placed above or above the dust separator or at the same height as the dust separator.

The floor vacuum cleaner according to claim 1 or 2, wherein the motor blower unit comprises a radial blower.

The floor vacuum cleaner according to claim 3, wherein the axis of rotation of the radial fan during operation of the floor vacuum cleaner is oriented vertically or at an angle of at most 60 °, especially at most 45 °, relative to the vertical line.

Floor vacuum cleaner according to one of the preceding claims, wherein the motor blower unit is arranged on the housing.

A floor vacuum cleaner according to one of the preceding claims, wherein the motor blower unit is designed in such a way that it generates a volume flow of more than 30 l / s at an opening of less than 900 W according to DIN EN 60312-1 at opening 8. at an electrical take-up power of less than 600 W according to DIN EN 60312-1 at aperture 8 generates a volume current of more than 25 l / s and / or at an electric uptake power of less than 300 W according to DIN EN 60312-1 at aperture 8 generates a volume flow greater than 15 l / s.

The floor vacuum cleaner according to one of the preceding claims, wherein the floor nozzle comprises a bottom plate having a base surface which, when operating the floor vacuum cleaner, faces the surface to be vacuumed, wherein the floor plate parallel to the base surface comprises at least one air flow duct with an opening provided in the side of the bottom plate.

The floor vacuum cleaner according to one of the preceding claims, wherein the suction pipe has a diameter in a range from 25 mm to 50 mm and / or a length in a range from 600 mm to 1200 mm.

The floor vacuum cleaner according to one of the preceding claims, wherein the suction hose has a diameter in a range from 25 mm to 50 mm and / or a length in a range from 1000 mm to 2500 mm.

The floor vacuum cleaner according to any one of the preceding claims, wherein the dust separator comprises a blowout filter, in particular with a filter surface of at least 800 cm2.

The floor vacuum cleaner according to one of the preceding claims, wherein the floor vacuum cleaner is a bag vacuum cleaner, especially with a filter surface of at least 800 cm2.

The floor vacuum cleaner according to claim 11, wherein the dust separator comprises a vacuum cleaner filter bag, especially where the vacuum cleaner filter bag is in the form of a flat bag and / or is designed as a disposable bag.

The floor vacuum cleaner according to claim 11 or 12, wherein the bag wall of the vacuum cleaner filter bag comprises one or more layers of a non-woven and / or one or more layers of a non-woven fabric.

The floor vacuum cleaner according to any one of claims 1-10, wherein the floor vacuum cleaner is a bag-free vacuum cleaner, especially with a exhaust filter with a filter surface of at least 800 cm 2.

The floor vacuum cleaner of claim 14, wherein the dust separator comprises a baffle separator or a centrifugal force separator.

The floor vacuum cleaner according to one of the preceding claims, comprising a second motor blower unit.