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EP3184011B1 - Geometry of an air-driven circuit for a hand-held vacuum cleaner - Google Patents

Geometry of an air-driven circuit for a hand-held vacuum cleaner Download PDF

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Publication number
EP3184011B1
EP3184011B1 EP16204881.3A EP16204881A EP3184011B1 EP 3184011 B1 EP3184011 B1 EP 3184011B1 EP 16204881 A EP16204881 A EP 16204881A EP 3184011 B1 EP3184011 B1 EP 3184011B1
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EP
European Patent Office
Prior art keywords
vacuum cleaner
hand
revolution
held vacuum
main
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EP16204881.3A
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German (de)
French (fr)
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EP3184011A1 (en
Inventor
Donatien Frot
Fabien David
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SEB SA
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SEB SA
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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
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/24—Hand-supported suction cleaners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1616—Multiple arrangement thereof
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1658—Construction of outlets

Definitions

  • the present invention relates to hand-held vacuum cleaners of the “bagless” type operating on batteries, using an electronically commutated motor (ECM) and comprising a cyclonic filtration device.
  • ECM electronically commutated motor
  • the invention relates to a particular architecture of an aeraulic circuit for evacuating an air flow at the outlet of the engine.
  • Hand-held vacuum cleaners which include a main air suction duct as well as suction means generating an air flow through the main air suction duct. These vacuum cleaners also include a cyclonic dust separation device aeraulically connected to the main suction duct and a secondary exhaust duct which is arranged to exhaust the air flow. Said secondary discharge duct is generally connected in an aeraulic manner to the cyclonic dust separation device and is arranged after the latter.
  • a vacuum cleaner according to the preamble of claim 1 is already known, for example from GB-A-2468299 .
  • An object of the present invention is to respond to the drawbacks mentioned above and to provide an aeraulic circuit which makes it possible to reduce the pressure losses as much as possible, to reduce the noise level of the vacuum cleaner, to cool the engine electronics, to direct the air outlet flow and to ensure the compactness of the hand vacuum cleaner.
  • the secondary air flow discharge duct is lengthened with respect to the existing ducts which directly reject the air out of the main body. This makes it possible to reduce the speed of the air flow leaving the secondary exhaust duct and thus makes it possible to at least partially reduce the noise. Indeed, as the contact surface between the air flow and the secondary exhaust duct is increased, there is more friction of the flow with the walls of the secondary exhaust duct, which has the consequence of mechanically reducing the speed. of the air flow at the outlet and therefore reduce noise.
  • the secondary air discharge duct forms an angle of between 80 and 90 ° with the external outlet.
  • the outgoing flow can be oriented so that it is not directed towards the user.
  • the main body comprises at least a main part and a secondary part and said main part comprises a portion which is positioned under said secondary part and said secondary part comprises a central cone of revolution along an axis of revolution directed towards the inside of the main body and which is positioned at least in part below the portion of the main part.
  • Such a construction makes it possible to manufacture a secondary exhaust duct from the main body and thus to reduce the noise while maintaining the compactness of such a vacuum cleaner because it is not necessary to add an annex duct which would increase the size. of such a vacuum cleaner.
  • the main part comprises a first wall and the secondary part comprises a second wall and said first and second walls form the secondary discharge duct.
  • the hand vacuum cleaner comprises a motor which comprises an axis of revolution substantially parallel to the axis of revolution of the central cone of revolution.
  • This characteristic has the effect of having a motor which is oriented in the same direction as the circulating air flow, which makes it possible not to interfere with said flow and therefore to have no pressure drops.
  • the cyclonic separation device comprises an axis of revolution which is substantially perpendicular to the axis of revolution of the cone or of the motor.
  • This characteristic has the effect of optimizing the compactness of the cyclonic separation device.
  • the external outlet of said secondary discharge duct extends at an angle of between 10 ° and 300 ° around the axis of revolution of the cone.
  • This feature has the effect of adapting the size of the external outlet to the quantity of air expelled.
  • the external outlet of said secondary discharge duct forms a surface on the main body of between 5 and 20 cm 2 and preferably 16 cm 2 .
  • the vacuum cleaner comprises a screen at the outlet of the main suction duct so as to divide the flow and to direct part of the air flow towards the secondary air discharge duct and another part to an electronic card so as to cool the latter.
  • an acoustic foam is positioned in the secondary air discharge duct.
  • This foam has the effect of further reducing the speed of the air flow and therefore of reducing noise.
  • a hand-held vacuum cleaner 1 is composed of a main body 2.
  • This main body 2 comprises at one of its ends a main air suction duct 6 and at another end a secondary duct 8 for discharging the air. air.
  • This secondary air discharge duct 8 comprises an external outlet 9.
  • the main body 2 contains suction means 7 generating an air flow through the main suction duct 6. air and the secondary duct 8 for evacuating the air.
  • the air is sucked in by the main air suction duct 6 and is rejected by the secondary air evacuation duct 8 at the level of the external outlet 9.
  • an acoustic foam (not shown) can be positioned in the secondary air discharge duct 8 in order to further attenuate the air speed and therefore the noise.
  • a gripping handle 5 is attached to the main body 2. It allows a user to handle the vacuum cleaner 1 by hand. In the embodiment of the invention, this is located under the main body 2 for good handling, but in other embodiments, not shown, it can be located elsewhere on the main body 2 .
  • the hand-held vacuum cleaner 1 further comprises a device 4 for cyclonic dust separation.
  • This cyclonic separation device 4 is attached to the main body 2. It is located below the latter so as to be perpendicular and connected in an aeraulic manner to the main suction duct 6.
  • the cyclonic separation device 4 is arranged in a revolution about an axis of revolution ⁇ 3.
  • the axis of revolution ⁇ 3 is substantially perpendicular to the main suction duct 6, as visible at figure 1 .
  • the cyclonic separation device 4 is single-stage. In another variant embodiment, not shown, it may have two stages.
  • the suction means 7 are composed of a motor 7.
  • This motor 7 is positioned around and along an axis of revolution ⁇ 2.
  • the axis of revolution ⁇ 2 of the motor is located substantially along the length of the main body 2 so that the motor is oriented in the direction of travel of the air flow.
  • this motor 7 is an electronically commutated motor (ECM).
  • the main body 2 is composed of at least a main part 12 and a secondary part 13.
  • the main part 12 comprises a portion 14 which is descending, that is to say which tilts towards the interior or the center of the main body 2.
  • This portion 14, like the main part 12, is at least in part substantially circular as visible at the figure 1 . In other words, this portion stretches at least at an angle of between 10 ° and 300 ° around the axis of revolution ⁇ 2.
  • This portion 14 is positioned under the secondary part 13.
  • the secondary part 13 for its part comprises a cone 15 which has a revolution along an axis of revolution ⁇ 1.
  • the axis of revolution ⁇ 1 is substantially parallel to the axis of revolution ⁇ 2 of the motor 7 which means that the cone 15 is positioned at the center of the secondary part 13.
  • This cone 15 will be called cone 15 of central revolution hereafter.
  • the top of the cone 15 is directed towards the inside of the main body 2. In this way, the cone 15 is positioned at least partly inside and in the center of the portion 14 of the main part 12.
  • the main part 12 and the secondary part 13 form the secondary duct 8 for discharging the air to the external outlet 9.
  • the main part 12 (including the portion 14) comprises a first wall 16 which corresponds to the surface of the secondary air discharge duct 8 on which the air rests in order to exit.
  • the secondary part 13 comprises a second wall 17 which corresponds to the surface of the secondary air discharge duct 8 on which also rests the air which is to be discharged. It is more precisely these walls which form the secondary duct 8 for evacuating the air.
  • This comprises a passage 10 which forms a fold 11 at an angle ⁇ of between 120 ° and 200 °.
  • This bend 11 forms a baffle which forces the air, which passes through the secondary discharge duct 8, to make a practically complete bend, that is to say a bend (or baffle) at an angle of between 120 ° and 200 °.
  • this turn takes place around an axis of trajectory A.
  • This axis of trajectory A is directed along the portion 14 of the main part 12 as visible at the bottom. figure 3 .
  • the advantage of this bend is to increase the surface area of the walls in contact with the air flow and therefore to increase the friction of the air with the walls, which makes it possible to slow down the speed of the air.
  • the slowed-down air arrives through the secondary air discharge duct 8 at the level of the external outlet 9.
  • This external outlet 9 corresponds to a gap formed between the main part 12 and the secondary part 13 along the periphery of the main body 2.
  • the separation between the two parts is on average 1 cm. It can also be narrower or wider.
  • the outer outlet 9 of said secondary discharge duct 8 stretches at an angle of between 10 ° and 300 ° around the axis of revolution ⁇ 2.
  • the outer outlet 9 forms a plane P.
  • Said plane P corresponds to a plane P tangent to the main body 2 and is positioned between the outer ends of the walls of the secondary air discharge duct 8 at the level of the outer outlet 9
  • the plane P and the secondary exhaust duct 8 form between them an angle ⁇ which is between 80 and 90 ° so that the air makes a perpendicular turn in the secondary exhaust duct 8. In this way the air flow comes out substantially perpendicularly relative to the main body 2, which makes it possible to direct the flow in a direction other than towards the user.
  • the external outlet 9 of said secondary discharge duct 8 stretches along the main body 2. It stretches around the axis of revolution ⁇ 1 of the cone 15 at an angle of between 10 ° and 300 °.
  • the outer outlet 9 stretches at an angle of 300 ° around the axis of revolution ⁇ 1 and the area occupied by the outer outlet 9 is 16 cm 2 .
  • the hand-held vacuum cleaner 1 comprises an electronic card 19 which is positioned in the main body 2.
  • the hand-held vacuum cleaner 1 further comprises a screen 18 at the outlet of the main suction duct 6. This serves to divide the air flow and to direct a part of the air flow towards the secondary air discharge duct 8 and another part towards the electronic card 19 so as to cool the latter.
  • the part of the air flow incident on the electronic card 19 has a speed of between 6 and 15 ms -1 which makes it possible to cool the components most sensitive to temperature constraints.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Description

La présente invention concerne les aspirateurs à main de type « sans sac » fonctionnant sur batteries, utilisant un moteur à commutations électroniques (MCE) et comprenant un dispositif de filtration cyclonique.The present invention relates to hand-held vacuum cleaners of the “bagless” type operating on batteries, using an electronically commutated motor (ECM) and comprising a cyclonic filtration device.

Plus particulièrement l'invention concerne une architecture particulière d'un circuit aéraulique d'évacuation d'un flux d'air en sortie du moteur.More particularly the invention relates to a particular architecture of an aeraulic circuit for evacuating an air flow at the outlet of the engine.

On connait déjà des aspirateurs à main qui comprennent un conduit principal d'aspiration d'air ainsi que des moyens d'aspiration générant un flux d'air à travers le conduit principal d'aspiration d'air. Ces aspirateurs comprennent également un dispositif de séparation cyclonique de poussière connecté de façon aéraulique au conduit principal d'aspiration et un conduit secondaire d'évacuation qui est agencé pour évacuer le flux d'air. Ledit conduit secondaire d'évacuation est en général connecté de façon aéraulique au dispositif de séparation cyclonique de poussière et est agencé après celui-ci.Hand-held vacuum cleaners are already known which include a main air suction duct as well as suction means generating an air flow through the main air suction duct. These vacuum cleaners also include a cyclonic dust separation device aeraulically connected to the main suction duct and a secondary exhaust duct which is arranged to exhaust the air flow. Said secondary discharge duct is generally connected in an aeraulic manner to the cyclonic dust separation device and is arranged after the latter.

Cependant le conduit secondaire d'évacuation de ces aspirateurs rejette directement le flux d'air à l'extérieur de l'aspirateur. En d'autres termes, le flux en sortie du moteur emprunte le chemin le plus court pour sortir de l'aspirateur. Il a été remarqué que ceci engendre beaucoup de bruit du fait que le flux d'air a une vitesse élevée en sortie du conduit secondaire d'évacuation. Ces aspirateurs à main sont donc bruyants ce qui engendre une gêne pour les utilisateurs.However, the secondary exhaust duct of these vacuum cleaners directly rejects the air flow outside the vacuum cleaner. In other words, the flow leaving the motor takes the shortest path out of the vacuum cleaner. It has been observed that this generates a lot of noise because the air flow has a high speed at the outlet of the secondary exhaust duct. These hand-held vacuum cleaners are therefore noisy which causes inconvenience to users.

Des constructions particulières de conduit secondaire d'évacuation existent afin de diminuer le bruit mais elles induisent des inconvénients comme des pertes de charge au niveau du moteur ou une diminution de la compacité de l'aspirateur à main ou encore une évacuation non orientée du flux d'air. Un aspirateur selon le préambule de la revendication 1 est déjà connu par exemple de GB-A-2468299 .Special constructions of secondary discharge ducts exist in order to reduce the noise but they induce drawbacks such as load losses at the level of the motor or a reduction in the compactness of the hand-held vacuum cleaner or even a non-oriented discharge of the flow of water. 'air. A vacuum cleaner according to the preamble of claim 1 is already known, for example from GB-A-2468299 .

Un but de la présente invention est de répondre aux inconvénients mentionnés ci-dessus et de proposer un circuit aéraulique qui permette de réduire au maximum les pertes de charges, de réduire le niveau sonore de l'aspirateur, de refroidir l'électronique du moteur, d'orienter le flux de sortie d'air et de garantir la compacité de l'aspirateur à main.An object of the present invention is to respond to the drawbacks mentioned above and to provide an aeraulic circuit which makes it possible to reduce the pressure losses as much as possible, to reduce the noise level of the vacuum cleaner, to cool the engine electronics, to direct the air outlet flow and to ensure the compactness of the hand vacuum cleaner.

Pour cela l'invention concerne un aspirateur à main comprenant :

  • un corps principal comprenant une poignée de préhension et un conduit principal d'aspiration d'air ;
  • des moyens d'aspiration générant un flux d'air à travers le conduit principal d'aspiration d'air ;
  • un dispositif de séparation cyclonique de poussière à un ou deux étages, connecté de façon aéraulique au conduit principal d'aspiration ;
  • un conduit secondaire d'évacuation de l'air comprenant une sortie extérieure ;
caractérisé en ce que
le conduit secondaire d'évacuation de l'air comprend au moins un passage dans lequel ledit conduit secondaire forme un repli selon un angle compris entre 120° et 200° et préférentiellement 180° selon un axe de trajectoire.For this, the invention relates to a hand-held vacuum cleaner comprising:
  • a main body comprising a grip handle and a main air suction duct;
  • suction means generating an air flow through the main air suction duct;
  • a one- or two-stage cyclonic dust separation device, aeraulically connected to the main suction duct;
  • a secondary air discharge duct comprising an external outlet;
characterized in that
the secondary air discharge duct comprises at least one passage in which said secondary duct forms a fold at an angle of between 120 ° and 200 ° and preferably 180 ° along a trajectory axis.

De cette manière le conduit secondaire d'évacuation du flux d'air est rallongé par rapport aux conduits existants qui rejettent directement l'air hors du corps principal. Ceci permet de réduire la vitesse du flux d'air en sortie du conduit secondaire d'évacuation et permet ainsi de diminuer au moins en partie le bruit. En effet comme la surface de contact entre le flux d'air et le conduit secondaire d'évacuation est augmentée, il y a plus de frottements du flux avec les parois du conduit secondaire d'évacuation ce qui a pour conséquence de diminuer mécaniquement la vitesse du flux d'air en sortie et donc de diminuer le bruit.In this way, the secondary air flow discharge duct is lengthened with respect to the existing ducts which directly reject the air out of the main body. This makes it possible to reduce the speed of the air flow leaving the secondary exhaust duct and thus makes it possible to at least partially reduce the noise. Indeed, as the contact surface between the air flow and the secondary exhaust duct is increased, there is more friction of the flow with the walls of the secondary exhaust duct, which has the consequence of mechanically reducing the speed. of the air flow at the outlet and therefore reduce noise.

Selon une caractéristique de l'invention, le conduit secondaire d'évacuation de l'air forme avec la sortie extérieure un angle compris entre 80 et 90°.According to one characteristic of the invention, the secondary air discharge duct forms an angle of between 80 and 90 ° with the external outlet.

De cette manière on peut orienter le flux sortant de manière à ce qu'il ne soit pas dirigé vers l'utilisateur.In this way, the outgoing flow can be oriented so that it is not directed towards the user.

Selon une caractéristique de l'invention, le corps principal comprend au moins une partie principale et une partie secondaire et ladite partie principale comprend une portion qui vient se positionner sous ladite partie secondaire et ladite partie secondaire comprend un cône de révolution central selon un axe de révolution dirigé vers l'intérieur du corps principal et qui vient se positionner au moins en partie en dessous de la portion de la partie principale.According to one characteristic of the invention, the main body comprises at least a main part and a secondary part and said main part comprises a portion which is positioned under said secondary part and said secondary part comprises a central cone of revolution along an axis of revolution directed towards the inside of the main body and which is positioned at least in part below the portion of the main part.

Une telle construction permet de fabriquer un conduit secondaire d'évacuation à partir du corps principal et ainsi de diminuer le bruit tout en conservant la compacité d'un tel aspirateur car il n'est pas nécessaire de rajouter un conduit annexe qui viendrait augmenter la taille d'un tel aspirateur.Such a construction makes it possible to manufacture a secondary exhaust duct from the main body and thus to reduce the noise while maintaining the compactness of such a vacuum cleaner because it is not necessary to add an annex duct which would increase the size. of such a vacuum cleaner.

Selon une caractéristique de l'invention, la partie principale comprend une première paroi et la partie secondaire comprend une seconde paroi et lesdites premières et secondes parois forment le conduit secondaire d'évacuation.According to one characteristic of the invention, the main part comprises a first wall and the secondary part comprises a second wall and said first and second walls form the secondary discharge duct.

De cette manière il n'est pas nécessaire d'ajouter de la matière pour obtenir un conduit secondaire d'évacuation permettant de ne pas augmenter ni le poids, ni la taille.In this way, it is not necessary to add material in order to obtain a secondary discharge duct allowing neither the weight nor the size to be increased.

Selon une caractéristique de l'invention, l'aspirateur à main comprend un moteur qui comprend un axe de révolution sensiblement parallèle à l'axe de révolution du cône de révolution central.According to one characteristic of the invention, the hand vacuum cleaner comprises a motor which comprises an axis of revolution substantially parallel to the axis of revolution of the central cone of revolution.

Cette caractéristique a pour effet d'avoir un moteur qui soit orienté dans le même sens que le flux d'air circulant ce qui permet de ne pas interférer avec ledit flux et donc de ne pas avoir de pertes de charge.This characteristic has the effect of having a motor which is oriented in the same direction as the circulating air flow, which makes it possible not to interfere with said flow and therefore to have no pressure drops.

Selon une caractéristique de l'invention, le dispositif de séparation cyclonique comprend un axe de révolution qui est sensiblement perpendiculaire à l'axe de révolution du cône ou du moteur.According to one characteristic of the invention, the cyclonic separation device comprises an axis of revolution which is substantially perpendicular to the axis of revolution of the cone or of the motor.

Cette caractéristique a pour effet d'optimiser la compacité du dispositif de séparation cyclonique.This characteristic has the effect of optimizing the compactness of the cyclonic separation device.

Selon une caractéristique de l'invention, la sortie extérieure dudit conduit secondaire d'évacuation s'étire selon un angle compris entre 10° et 300° autour de l'axe de révolution du cône.According to one characteristic of the invention, the external outlet of said secondary discharge duct extends at an angle of between 10 ° and 300 ° around the axis of revolution of the cone.

Cette caractéristique a pour effet d'adapter la taille de la sortie extérieure à la quantité d'air expulsée.This feature has the effect of adapting the size of the external outlet to the quantity of air expelled.

Selon une caractéristique de l'invention, la sortie extérieure dudit conduit secondaire d'évacuation forme une surface sur le corps principal comprise entre 5 et 20 cm2 et préférentiellement 16 cm2.According to one characteristic of the invention, the external outlet of said secondary discharge duct forms a surface on the main body of between 5 and 20 cm 2 and preferably 16 cm 2 .

Selon une caractéristique de l'invention, l'aspirateur comprend un écran en sortie du conduit principal d'aspiration de manière à diviser le flux et à orienter une partie du flux d'air vers le conduit secondaire d'évacuation de l'air et une autre partie vers une carte électronique de manière à refroidir celle-ci.According to one characteristic of the invention, the vacuum cleaner comprises a screen at the outlet of the main suction duct so as to divide the flow and to direct part of the air flow towards the secondary air discharge duct and another part to an electronic card so as to cool the latter.

Selon une caractéristique de l'invention, une mousse acoustique est positionnée dans le conduit secondaire d'évacuation de l'air.According to one characteristic of the invention, an acoustic foam is positioned in the secondary air discharge duct.

Cette mousse a pour effet de diminuer encore la vitesse du flux d'air et donc de diminuer le bruit.This foam has the effect of further reducing the speed of the air flow and therefore of reducing noise.

D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description détaillée qui suit d'un mode de réalisation de l'invention donné à titre d'exemple nullement limitatif et illustré par les dessins annexés, dans lesquels :

  • la figure 1 représente une vue en perspective d'un aspirateur à main conforme à l'invention ;
  • la figure 2 représente une vue en coupe de l'aspirateur à main ;
  • la figure 3 représente un agrandissement d'une partie de la figure 2.
Other characteristics and advantages of the present invention will emerge more clearly on reading the following detailed description of an embodiment of the invention given by way of non-limiting example and illustrated by the appended drawings, in which:
  • the figure 1 shows a perspective view of a hand vacuum cleaner according to the invention;
  • the figure 2 shows a sectional view of the hand vacuum cleaner;
  • the figure 3 represents an enlargement of part of the figure 2 .

Comme visible à la figure 1, un aspirateur 1 à main est composé d'un corps principal 2. Ce corps principal 2 comprend à une de ses extrémités un conduit 6 principal d'aspiration d'air et à une autre extrémité un conduit 8 secondaire d'évacuation de l'air. Ce conduit 8 secondaire d'évacuation de l'air comprend une sortie extérieure 9. Entre ces deux conduits, le corps principal 2 renferme des moyens 7 d'aspiration générant un flux d'air à travers le conduit 6 principal d'aspiration d'air et le conduit 8 secondaire d'évacuation de l'air. En d'autres termes, l'air est aspiré par le conduit 6 principal d'aspiration d'air et est rejeté par le conduit 8 secondaire d'évacuation de l'air au niveau de la sortie extérieure 9. Dans une variante de réalisation, une mousse acoustique (non représentée) peut être positionnée dans le conduit 8 secondaire d'évacuation de l'air afin d'atténuer encore la vitesse de l'air et donc le bruit.As visible at the figure 1 , a hand-held vacuum cleaner 1 is composed of a main body 2. This main body 2 comprises at one of its ends a main air suction duct 6 and at another end a secondary duct 8 for discharging the air. air. This secondary air discharge duct 8 comprises an external outlet 9. Between these two ducts, the main body 2 contains suction means 7 generating an air flow through the main suction duct 6. air and the secondary duct 8 for evacuating the air. In other words, the air is sucked in by the main air suction duct 6 and is rejected by the secondary air evacuation duct 8 at the level of the external outlet 9. In an alternative embodiment , an acoustic foam (not shown) can be positioned in the secondary air discharge duct 8 in order to further attenuate the air speed and therefore the noise.

Une poignée 5 de préhension est attachée au corps principal 2. Elle permet à un utilisateur de manipuler l'aspirateur 1 à main. Dans le mode de réalisation de l'invention, celle-ci se situe sous le corps principal 2 pour une bonne manipulation, mais dans d'autres modes de réalisation, non représentés, celle-ci peut se trouver positionnée ailleurs sur le corps principal 2.A gripping handle 5 is attached to the main body 2. It allows a user to handle the vacuum cleaner 1 by hand. In the embodiment of the invention, this is located under the main body 2 for good handling, but in other embodiments, not shown, it can be located elsewhere on the main body 2 .

L'aspirateur 1 à main comprend en outre un dispositif 4 de séparation cyclonique de poussière. Celui-ci peut être à un ou plusieurs étages et il a pour but de séparer et de filtrer la poussière. Ce dispositif 4 de séparation cyclonique est attaché au corps principal 2. Il se situe en dessous de celui-ci de manière à être perpendiculaire et connecté de façon aéraulique au conduit 6 principal d'aspiration. Le dispositif 4 de séparation cyclonique est disposé selon une révolution autour d'un axe de révolution Δ3. L'axe de révolution Δ3 est sensiblement perpendiculaire au conduit 6 principal d'aspiration, comme visible à la figure 1. Le dispositif 4 de séparation cyclonique est à un étage. Dans une autre variante de réalisation, non représentée, il peut être à deux étages.The hand-held vacuum cleaner 1 further comprises a device 4 for cyclonic dust separation. This can be on one or more floors and its purpose is to separate and filter the dust. This cyclonic separation device 4 is attached to the main body 2. It is located below the latter so as to be perpendicular and connected in an aeraulic manner to the main suction duct 6. The cyclonic separation device 4 is arranged in a revolution about an axis of revolution Δ3. The axis of revolution Δ3 is substantially perpendicular to the main suction duct 6, as visible at figure 1 . The cyclonic separation device 4 is single-stage. In another variant embodiment, not shown, it may have two stages.

Comme visible à la figure 2, les moyens 7 d'aspiration sont composés d'un moteur 7. Ce moteur 7 est positionné autour et le long d'un axe de révolution Δ2. L'axe de révolution Δ2 du moteur se situe sensiblement dans la longueur du corps principal 2 de manière à ce que le moteur soit orienté dans le sens de parcours du flux d'air. Dans le cadre de l'invention, ce moteur 7 est un moteur à commutation électronique (MCE).As visible at the figure 2 , the suction means 7 are composed of a motor 7. This motor 7 is positioned around and along an axis of revolution Δ2. The axis of revolution Δ2 of the motor is located substantially along the length of the main body 2 so that the motor is oriented in the direction of travel of the air flow. In the context of the invention, this motor 7 is an electronically commutated motor (ECM).

Plus particulièrement et comme visible à la figure 2, le corps principal 2 est composé d'au moins une partie principale 12 et d'une partie secondaire 13.More particularly and as visible at the figure 2 , the main body 2 is composed of at least a main part 12 and a secondary part 13.

La partie principale 12 comprend une portion 14 qui est descendante c'est-à-dire qui s'incline vers l'intérieur ou le centre du corps principal 2. Cette portion 14, comme la partie principal 12, est au moins en partie sensiblement circulaire comme visible à la figure 1. En d'autres termes, cette portion s'étire au moins selon un angle compris entre 10° et 300° autour de l'axe de révolution Δ2.The main part 12 comprises a portion 14 which is descending, that is to say which tilts towards the interior or the center of the main body 2. This portion 14, like the main part 12, is at least in part substantially circular as visible at the figure 1 . In other words, this portion stretches at least at an angle of between 10 ° and 300 ° around the axis of revolution Δ2.

Cette portion 14 vient se positionner sous la partie secondaire 13. La partie secondaire 13 comprend quant à elle un cône 15 qui a une révolution selon un axe de révolution Δ1. L'axe de révolution Δ1 est sensiblement parallèle à l'axe de révolution Δ2 du moteur 7 ce qui fait que le cône 15 est positionné au centre de la partie secondaire 13. Ce cône 15 sera appelé cône 15 de révolution central par la suite. Le haut du cône 15 est dirigé vers l'intérieur du corps principal 2. De cette manière, le cône 15 vient se positionner au moins en partie à l'intérieur et au centre de la portion 14 de la partie principale 12.This portion 14 is positioned under the secondary part 13. The secondary part 13 for its part comprises a cone 15 which has a revolution along an axis of revolution Δ1. The axis of revolution Δ1 is substantially parallel to the axis of revolution Δ2 of the motor 7 which means that the cone 15 is positioned at the center of the secondary part 13. This cone 15 will be called cone 15 of central revolution hereafter. The top of the cone 15 is directed towards the inside of the main body 2. In this way, the cone 15 is positioned at least partly inside and in the center of the portion 14 of the main part 12.

De cette manière, la partie principale 12 et la partie secondaire 13 forment le conduit 8 secondaire d'évacuation de l'air vers la sortie extérieure 9. A cet effet la partie principale 12 (incluant la portion 14) comprend une première paroi 16 qui correspond à la surface du conduit 8 secondaire d'évacuation de l'air sur laquelle vient s'appuyer l'air afin de sortir. De la même manière la partie secondaire 13 comprend une seconde paroi 17 qui correspond à la surface du conduit 8 secondaire d'évacuation de l'air sur laquelle vient également s'appuyer l'air qui doit être évacué. Ce sont plus précisément ces parois qui forment le conduit 8 secondaire d'évacuation de l'air. Celui-ci comprend un passage 10 qui forme un repli 11 selon un angle α compris entre 120° et 200°. Ce repli 11 forme une chicane qui impose à l'air, qui traverse le conduit 8 secondaire d'évacuation, d'opérer un virage pratiquement complet, c'est-à-dire un virage (ou chicane) selon un angle compris entre 120° et 200°. Dans le cadre de l'invention ce virage s'opère autour d'un axe de trajectoire A. Cet axe de trajectoire A est dirigé le long de la portion 14 de la partie principale 12 comme visible à la figure 3. L'intérêt de ce virage est d'augmenter la surface des parois en contact avec le flux d'air et donc d'augmenter les frottements de l'air avec les parois ce qui permet de ralentir la vitesse de l'air. Ensuite l'air ralenti arrive par le conduit 8 secondaire d'évacuation de l'air au niveau de la sortie extérieure 9. Cette sortie extérieure 9 correspond à un interstice formé entre la partie principale 12 et la partie secondaire 13 le long du pourtour du corps principal 2. La séparation entre les deux parties est en moyenne de 1 cm. Elle peut également être plus étroite ou plus large.In this way, the main part 12 and the secondary part 13 form the secondary duct 8 for discharging the air to the external outlet 9. For this purpose, the main part 12 (including the portion 14) comprises a first wall 16 which corresponds to the surface of the secondary air discharge duct 8 on which the air rests in order to exit. Likewise, the secondary part 13 comprises a second wall 17 which corresponds to the surface of the secondary air discharge duct 8 on which also rests the air which is to be discharged. It is more precisely these walls which form the secondary duct 8 for evacuating the air. This comprises a passage 10 which forms a fold 11 at an angle α of between 120 ° and 200 °. This bend 11 forms a baffle which forces the air, which passes through the secondary discharge duct 8, to make a practically complete bend, that is to say a bend (or baffle) at an angle of between 120 ° and 200 °. In the context of the invention, this turn takes place around an axis of trajectory A. This axis of trajectory A is directed along the portion 14 of the main part 12 as visible at the bottom. figure 3 . The advantage of this bend is to increase the surface area of the walls in contact with the air flow and therefore to increase the friction of the air with the walls, which makes it possible to slow down the speed of the air. Then the slowed-down air arrives through the secondary air discharge duct 8 at the level of the external outlet 9. This external outlet 9 corresponds to a gap formed between the main part 12 and the secondary part 13 along the periphery of the main body 2. The separation between the two parts is on average 1 cm. It can also be narrower or wider.

En lien avec les figures 1 et 2, la sortie extérieure 9 dudit conduit 8 secondaire d'évacuation s'étire selon un angle compris entre 10° et 300° autour de l'axe de révolution Δ2.In connection with figures 1 and 2 , the outer outlet 9 of said secondary discharge duct 8 stretches at an angle of between 10 ° and 300 ° around the axis of revolution Δ2.

Comme visible à la figure 3 ou à la figure 1, la sortie extérieure 9 forme un plan P. Ledit plan P correspond à un plan P tangent au corps principal 2 et est positionné entre les extrémités extérieures des parois du conduit 8 secondaire d'évacuation de l'air au niveau de la sortie extérieure 9. Le plan P et le conduit 8 secondaire d'évacuation forment entre eux un angle β qui est compris entre 80 et 90° afin que l'air opère un virage perpendiculaire dans le conduit 8 secondaire d'évacuation. De cette manière le flux d'air sort sensiblement perpendiculairement par rapport au corps principal 2 ce qui permet de diriger le flux dans une direction autre que vers l'utilisateur.As visible at the figure 3 or at the figure 1 , the outer outlet 9 forms a plane P. Said plane P corresponds to a plane P tangent to the main body 2 and is positioned between the outer ends of the walls of the secondary air discharge duct 8 at the level of the outer outlet 9 The plane P and the secondary exhaust duct 8 form between them an angle β which is between 80 and 90 ° so that the air makes a perpendicular turn in the secondary exhaust duct 8. In this way the air flow comes out substantially perpendicularly relative to the main body 2, which makes it possible to direct the flow in a direction other than towards the user.

Dans le cadre de l'invention, la sortie extérieure 9 dudit conduit 8 secondaire d'évacuation s'étire le long du corps principal 2. Elle s'étire autour de l'axe de révolution Δ1 du cône 15 selon un angle compris entre 10° et 300°. Dans le cadre de l'invention, la sortie extérieure 9 s'étire suivant un angle de 300° autour de l'axe de révolution Δ1 et la surface qu'occupe la sortie extérieure 9 est de 16 cm2.In the context of the invention, the external outlet 9 of said secondary discharge duct 8 stretches along the main body 2. It stretches around the axis of revolution Δ1 of the cone 15 at an angle of between 10 ° and 300 °. In the context of the invention, the outer outlet 9 stretches at an angle of 300 ° around the axis of revolution Δ1 and the area occupied by the outer outlet 9 is 16 cm 2 .

Afin de piloter le moteur 7, l'aspirateur 1 à main comprend une carte électronique 19 qui est positionnée dans le corps principal 2.In order to control the motor 7, the hand-held vacuum cleaner 1 comprises an electronic card 19 which is positioned in the main body 2.

L'aspirateur 1 à main comprend en outre un écran 18 en sortie du conduit 6 principal d'aspiration. Celui-ci sert à diviser le flux d'air et à orienter une partie du flux d'air vers le conduit 8 secondaire d'évacuation de l'air et une autre partie vers la carte électronique 19 de manière à refroidir celle-ci. A titre d'exemple la partie du flux d'air incident sur la carte électronique 19 a une vitesse comprise entre 6 et 15 m.s-1 ce qui permet de refroidir les composants les plus sensibles aux contraintes de température.The hand-held vacuum cleaner 1 further comprises a screen 18 at the outlet of the main suction duct 6. This serves to divide the air flow and to direct a part of the air flow towards the secondary air discharge duct 8 and another part towards the electronic card 19 so as to cool the latter. By way of example, the part of the air flow incident on the electronic card 19 has a speed of between 6 and 15 ms -1 which makes it possible to cool the components most sensitive to temperature constraints.

On comprendra que diverses modifications et/ou améliorations évidentes pour l'homme du métier peuvent être apportées au mode de réalisation de l'invention décrit dans la présente description sans sortir du cadre de l'invention défini par les revendications annexées.It will be understood that various modifications and / or improvements obvious to those skilled in the art can be made to the embodiment of the invention described in the present description without departing from the scope of the invention defined by the appended claims.

Claims (10)

  1. Hand-held vacuum cleaner (1) comprising:
    - a main body (2) comprising a handle (5) and a main air suctioning conduit (6);
    - suctioning means (7) generating an airflow through the main air suctioning conduit (6);
    - a cyclonic device (4) for separating dust to one or two stages, connected in an air-driven manner to the main suctioning conduit (6);
    - a secondary air discharging conduit (8) comprising an external outlet (9);
    characterised in that
    the secondary air discharging conduit (8) comprises at least one passage (10) wherein said secondary conduit (8) forms a fold (11) along an angle comprised between 120° and 200° and preferably 180° along a trajectory axis (A).
  2. Hand-held vacuum cleaner (1) according to the preceding claim, characterised in that the secondary air discharging conduit (8) forms with the external outlet (9), an angle comprised between 80 and 90°.
  3. Hand-held vacuum cleaner (1) according to one of the preceding claims, characterised in that the main body (2) comprises at least one main portion (12) and one secondary portion (13) and said main portion (12) comprises a portion (14) which is positioned under said secondary portion (13) and said secondary portion (13) comprises a cone (15) of central revolution along an axis of revolution (Δ1) directed inwards from the main body (2) and which is positioned at least partially below the portion (14) of the main portion (12).
  4. Hand-held vacuum cleaner (1) according to the preceding claim, characterised in that the main portion (12) comprises a first wall (16) and the secondary portion (13) comprises a second wall (17) and said first and second walls form the secondary discharging conduit (8).
  5. Hand-held vacuum cleaner (1) according to the preceding claim, characterised in that it comprises a motor (7) which comprises an axis of revolution (Δ2) substantially parallel to the axis of revolution (Δ1) of the cone (15) of central revolution.
  6. Hand-held vacuum cleaner (1) according to the preceding claim, characterised in that the cyclonic separation device (4) comprises an axis of revolution (Δ3) which is substantially perpendicular to the axis of revolution (Δ1) of the cone or of the motor.
  7. Hand-held vacuum cleaner (1) according to one of claims 3 to 6, characterised in that the external outlet (9) of said secondary discharging conduit (8) is stretched along an angle comprised between 10° and 300° around the axis of revolution (Δ1) of the cone.
  8. Hand-held vacuum cleaner (1) according to one of the preceding claims, characterised in that the external outlet (9) of said secondary discharging conduit (8) forms a surface on the main body (2) comprised between 5 and 20cm2 and preferably 16cm2.
  9. Hand-held vacuum cleaner (1) according to one of the preceding claims, characterised in that it comprises an outlet screen (18) of the main suctioning conduit (6) so as to split the flow and to orient one portion of the airflow to the secondary air discharging conduit (8) and another portion to an electronic board (19) so as to cool it.
  10. Hand-held vacuum cleaner (1) according to one of the preceding claims, characterised in that an acoustic foam is positioned in the secondary air discharging conduit (8).
EP16204881.3A 2015-12-23 2016-12-16 Geometry of an air-driven circuit for a hand-held vacuum cleaner Active EP3184011B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1563160A FR3046046B1 (en) 2015-12-23 2015-12-23 GEOMETRY OF AERAULIC CIRCUIT FOR A HAND VACUUM

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EP3184011B1 true EP3184011B1 (en) 2021-04-07

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KR (1) KR102617201B1 (en)
CN (2) CN106901651B (en)
ES (1) ES2869950T3 (en)
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WO (1) WO2017109360A1 (en)

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ES2869950T3 (en) 2021-10-26
CN206979439U (en) 2018-02-09
EP3184011A1 (en) 2017-06-28
CN106901651A (en) 2017-06-30
KR102617201B1 (en) 2023-12-26
CN106901651B (en) 2021-09-17
FR3046046A1 (en) 2017-06-30
WO2017109360A1 (en) 2017-06-29
KR20180093062A (en) 2018-08-20
FR3046046B1 (en) 2017-12-22

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