EP0453296B1 - Aspirateur de poussières - Google Patents

Aspirateur de poussières Download PDF

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Publication number
EP0453296B1
EP0453296B1 EP19910303496 EP91303496A EP0453296B1 EP 0453296 B1 EP0453296 B1 EP 0453296B1 EP 19910303496 EP19910303496 EP 19910303496 EP 91303496 A EP91303496 A EP 91303496A EP 0453296 B1 EP0453296 B1 EP 0453296B1
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EP
European Patent Office
Prior art keywords
casing
vacuum cleaner
cleaner according
blower
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19910303496
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German (de)
English (en)
Other versions
EP0453296A1 (fr
Inventor
Masao Sunagawa
Yukiji Iwase
Shigenori Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2100324A external-priority patent/JP3047984B2/ja
Priority claimed from JP2190540A external-priority patent/JP2852106B2/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0453296A1 publication Critical patent/EP0453296A1/fr
Application granted granted Critical
Publication of EP0453296B1 publication Critical patent/EP0453296B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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

Definitions

  • This invention relates to vacuum cleaners, and to means for reducing the noise they make.
  • the air on the blower side of the filter passes through the blower fan and radially outwardly through e.g. window openings in the housing which forms part of the blower motor.
  • a substantial contribution to noise is made by the passage of exhaust air from the blower motor housing to the one or more openings through which it escapes from the vacuum cleaner body.
  • the noise of this exhaust air can be reduced by causing it to pass along a passage, or through a space, containing a sound absorbing material such as a polyurethane foam.
  • EP-A-362895 describes a vacuum cleaner having an outer body with an interior casing defining a dust collection chamber.
  • An electric blower is mounted inside the outer body through a pair of vibration-isolating members, front and rear. The front vibration-isolating member contacts the rear of the dust collection chamber.
  • EP-A-289987 describes a vacuum cleaner having a horizontally-elongate body in which an electric blower is mounted axially vertically, in a blower casing within the outer body, behind a dust-collection chamber of the vacuum cleaner.
  • the blower is supported within the blower casing through top and bottom vibration-isolating members, but no such members are provided between the blower casing and the outer body, nor between the blower casing and the dust collection chamber.
  • the casing of a dust collection chamber of the vacuum cleaner is connected to a further casing downstream by way of a sealing member which vibrationally isolates the casings from one another around the suction air passage.
  • a blower motor casing within the cleaner main body has walls which have curvature in at least one plane over 70% or more of the wall area.
  • the casing of a dust collection chamber has side walls which are substantially entirely outwardly convex.
  • air flow created by a brushless motor driven impeller is passed through a microfilter capable of removing dust down to about 2 ⁇ m or less.
  • a brushless motor can obviate the previous need to filter out brush chips; consequently a fine filter as mentioned may be put in front of the motor to protect it and, where used, its speed sensing device, from fine dust.
  • the electric blower is surrounded within the vacuum cleaner body by a hard blower casing which has a radially outwardly directed exit opening through which the exhaust air escapes from the casing to flow along a transfer passage in a curved path with a substantially non-radial directional component.
  • the interior of the casing is such as to establish a swirling flow of the exhaust air.
  • the blower casing has a lining layer of a sound absorbing material e.g. a foam material. The disposition of sound absorbing material in the casing space may be used to establish the swirling flow.
  • the transfer passage curves away from the exit opening with a circumferential direction or component, and where there is swirling flow in the blower casing the sense of this should be aligned with the transfer passage direction.
  • the axial direction (relative to the blower); particularly preferably this is combined with a circumferential component.
  • the air flow direction at the exit opening is curved through at least 45 ° in the circumferential sense and/or the axial sense. In the very restricted space normally available inside a vacuum cleaner body, this may direct the flow to a useful location with a useful flow direction e.g. for passage into further noise reduction means.
  • the transfer passage extends without any sharp angle to disrupt the flow. Desirably therefore it forms a smooth continuous curve. Normally it will not be necessary for it to curve through more than 100° from the initial flow direction at the exit opening, indeed transfer passage deviation of less than 90° will frequently be sufficient to bring the flow to a useful location.
  • the outer wall formed by the blower casing - which may have a generally cylindrical form around the blower axis - may advantageously merge with an outer wall portion of the transfer passage in a substantially continuous curve.
  • the transfer passage desirably contains a sound absorbing element, e.g. of foam material. This may be disposed as a wall lining in the passage e.g. as a lining along the outer wall portion of the passage curve.
  • the transfer passage opens into a noise reduction space before leaving the vacuum cleaner body.
  • this space also contains sound absorbing material e.g. foam.
  • the noise reduction space may be a chamber of a generally flattened shape in which the exhaust air is guided by at least one curved guide means in the space, and preferably a plurality of curved guide means defining channelled flow paths, e.g. over a layer of sound absorbing material.
  • Such a noise reduction space provided at the bottom of the vacuum cleaner body may vent downwardly into a space defined between the bottom of the body and a runner base on which are mounted means e.g. castors whereby the vacuum cleaner may be easily moved across a floor.
  • the runner base and cleaner body may be relatively rotatable.
  • the exhaust air flow may escape from this exhaust space through a peripheral gap defined around the body between the runner base and body. This disperses the flow direction in many directions and helps to eliminate noise.
  • the blower casing of the vacuum cleaner may usefully be formed in two separable parts, and these may usefully define respectively opposing portions of the transfer passage.
  • the preferred blower casing is a substantially rigid shell e.g. of plastics material which may be lined e.g. with sound absorbing foam.
  • the blower housing may be surrounded by an air permeable foam layer through which the exhaust air must pass, within the casing, to help reduce motor noise.
  • a vacuum cleaner of the "pot" type has a generally cylindrical axially upright body 1 consisting of a generally cylindrical upper body portion 2, closed at its upper end and incorporating a carrying handle 70, and a lower body portion 3 closing off the bottom end of the upper portion 2.
  • the upper portion 2 has an openable front cover 6 allowing access to a dust collecting chamber 9 incorporating a dust collecting filter 5.
  • the dust collecting chamber 9 includes a generally cylindrical dust collecting casing 31 with a sealing inner cover 32 disposed inside the outer front cover 6 and having a hose socket 41 which receives, via a gas-tight packing 42, the end of a standard vacuum cleaner hose 62.
  • Hose 62 is rotatably mounted, in a generally conventional way, in the socket 41 which is positioned inside the front cover 6.
  • Inner cover 32 sealingly closes the front of a filter casing 58 containing a paper bag filter 5 which may be conventional.
  • the dust collecting chamber 9 opens rearwardly into an enclosed blower space 8 through a microfilter 33 which is for retaining any fine dust which might interfere with speed control 40 of the electric blower 7.
  • the blower 7 and its casing will be described in more detail below.
  • an accessory compartment 13 accommodating a cord reel 11 for taking up in a conventional way an electric power supply cord 10 for supplying power to the blower.
  • the compartment 13 also houses a control unit 54.
  • a metal casing 60 accommodating electric parts such as a noise filter and a rectifier circuit, on a power source substrate.
  • a metal casing 57 (Figs. 2,3) in which large capacitors, for power-factor improving and smoothing, are packaged.
  • An inverter circuit module 51 is attached to the bottom of the dust casing 31.
  • the vacuum cleaner is provided with a castor base 4, on which peripheral castors 27 are swivellably mounted. This is generally circular with an upturned periphery having a bumper 28 for preventing furniture damage, and receives the bottom part 3 of the vacuum cleaner body 1.
  • the lower body portion 3 is connected to the castor base 4 at a central axis by a rotation shaft 23 allowing the body 1 to be rotated without rotating the castor base 4.
  • the lower body portion 3 also has a plurality - 3 or 4 - of running wheels 29 which roll on the inside of the castor base 4 so that the body 1 and base 4 rotate with a spacing 30 maintained between them.
  • This spacing forms a chamber of generally flattened shape with an upturned edge portion which opens through an annular slot or gap 76 at the upper periphery of the castor base, defined on its inner side by the outwardly-facing surface of the lower body portion 3.
  • This space 30 serves for exhaust discharge, as will be explained in detail below.
  • the blower 7 includes a blower fan 12 situated in the opening from the dust collecting chamber 9 and driven by an invertor-driven brushless electric motor 39.
  • the motor and blower are mounted axially horizontally in the blower compartment 8 which is within the cleaner body 1 at the rear thereof.
  • the blower compartment 8 is defined by an electric blower casing of generally cylindrical form, with a front casing portion 17 (on the side of the fan 12) and a rear casing portion 16 which is separable from the front portion 17 to facilitate installation of the blower 7.
  • Front casing portion 17 has a central intake hole protected by plastic ribs 71.
  • the cylindrical side wall 15 of the casing is formed integrally, as part of the rear portion 16, with a spherically-curved central portion 14 of the rear wall of the casing, which gives the casing shell good rigidity and strength and in use reduces blower noises in the lower frequency range, i.e. of frequency below 1000 Hz.
  • the cylindrical housing 45 of the blower motor 39 is positioned coaxially within the cylindrical wall of the casing 16, 17, with a substantial radial spacing between housing and casing wall.
  • the housing 45 of the blower includes openings so that exhaust air is blown radially outwardly from the blower, in a manner which may be conventional.
  • these openings are provided with forwardly-opening tail pipes 38 so that the air is blown out forwardly along two 90° segments on opposite sides of the blower, as can be seen from Figure 2.
  • the tail pipes 38 may take other forms e.g. having a radially outwardly directed blower opening. Or, the tail pipes may be dispensed with altogether if desired.
  • a cylindrical air-permeable and flame-retardant cover 77 of e.g. low-density polyurethane foam, through which the exhaust air must pass.
  • the cylindrical cover 77 helps to reduce the risk of fire and also reduces motor noise while smoothing the exhaust air flow.
  • the outer wall 15 of the blower casing is generally cylindrical at its upper portion. It has a lining, of substantially uniform thickness, of a sound absorbing foam element 18.
  • a radial annular space 8 is defined between the sound absorbing member 18 and the inner foam cover 77, in which exhaust air can circulate within the blower casing.
  • the outer casing wall curves in more sharply to form a reduced radius portion in which the exhaust air circulation space 8 is substantially blocked off by the sound absorbing lining 18.
  • the outer wall 15 has an increase in curvature radius so that it extends away from the blower 7 and forms an outer wall of an exhaust or transfer passage 73 leading away from a substantially rectangular-section exit opening 72 penetrating the casing wall 15 at the lower right-hand portion thereof.
  • the left-hand edge of the exit opening 72 is defined by a sharp edge between the blower casing wall 15 and an inner wall 51 of the transfer passage 73.
  • Transfer passage 73 has a generally rectangular cross-section. It is defined by a radially outer wall portion 100 which, as described, extends to merge as a continuous curve with the cylindrical wall 15 of the blower casing and is formed integrally therewith from the casing parts 16, 17.
  • the radially inner wall 67 of the passage 73 extends generally parallel to the outer wall 100, and the internal cross-sectional area of the passage 73 is substantially constant.
  • a rear wall portion of the passage 73 is formed adjacent the exit opening 72 by the rear casing portion 16 and, further downstream, by front casing portion 17. It extends initially in a generally circumferential direction, but curves gradually forwardly (i.e.
  • the transfer passage exit is substantially in axial register with the front ribs 71 of the casing 17.
  • the front wall portion of the passage 73 is short and extends generally parallel to the rear wall portion, so that as explained the cross-sectional area of the passage 73 is not decreased.
  • All of the walls of the passage 73 are formed generally as smooth curves, with relatively large radius of curvature.
  • the resulting passage 73 defines a flow direction which, from the radially-outward exit opening 72, extends initially in a substantially circumferential sense relative to the cylindrical casing 15 and then also curving forwardly in an axial sense so that the flow direction at the end of the passage 73, is substantially in a forward axial direction and the end of the passage 73 is disposed below and to the right-hand side (looking rearwardly) of the blower casing cylindrical portion.
  • the flow direction in the passage 73 is generally guided in a smooth curve having a relatively large radius of curvature, without sharp corners.
  • the walls of the passage 73 are formed as integral extensions of parts of the front and rear blower casing portions 17, 16. Generally, the radius of curvature of the flow direction should not be less than about 5 cm at any point in the passage 73.
  • the outer (lower) wall portion 100 of the passage 73 is lined with sound absorbing material, e.g. polyurethane foam 18 which occupies between 25% and 50% of the passageway cross-section, and extends as a continuation of the sound absorbing lining 18 around the outer wall 15 of the blower casing.
  • sound absorbing material e.g. polyurethane foam 18 which occupies between 25% and 50% of the passageway cross-section, and extends as a continuation of the sound absorbing lining 18 around the outer wall 15 of the blower casing.
  • the outer wall portion 100 comprises a projection 21 which extends through the sound absorbing material to form a hard constriction or throat at the entrance of the passage 73.
  • the size of the projection 21 and hence the area of the throat is selected in dependence on the power of the electric blower.
  • the throat does not divert the exhaust air flow axial direction through a corner, but provides a hard boundary constriction in a manner which is effective to provide some noise reduction.
  • the blower casing and walls of the passage 73 are formed of hard plastics material and are mounted in the vacuum cleaner body through damping rubber annuli 68, 69 at the rear and front, to reduce vibration transmission from the blower to the body 1. Furthermore, the blower is itself mounted inside the blower casing through front and rear rubber damping members 36, 37 to inhibit further the transmission of vibrations.
  • the end of the exhaust transfer passage 73 opens substantially horizontally into a noise reduction chamber 19 which is formed generally in a ring shape in the bottom of the lower body portion 3, around the pivot housing for the castor base mounting.
  • the noise reduction chamber 19 has a generally flat horizontal top wall 22 of rigid plastics and defines a substantially C-shaped expansion space extending for about 200° in a generally flattened shape in the bottom of the body portion 3.
  • the top wall 22 of the space 19 is in vertical register with the top wall of the exhaust transfer passage 73 as the latter passage leads into it, and the passage 73 is of substantially the same vertical depth as the chamber 19.
  • the chamber 19 has a layer 20 of sound absorbing foam, like that in the blower casing and of substantially the same thickness, forming a lower surface thereof.
  • the sound absorbing member is supported on radial floor spokes 102 (Fig. 5) a little distance above the body portion 3, so as to allow some circulation of air below it.
  • Extending down from the top wall 22 are a plurality (two, in this embodiment) of arcuate guide ribs 61. These extend vertically down from the top wall 22 to the sound absorbing lower layer 20 and are curved in a circular arc around the C-shaped chamber space 19 from the opening of the transfer passage 73 through about 200° to a downwardly opening exit aperture 24 through the bottom of the lower body portion 3.
  • the space 19 contains three part-annular channels, each having as a top wall the top wall 22, as a bottom wall the sound absorbing layer 20, and as side walls either two of the ribs 61, or a rib 61 and a wall of the body portion 3.
  • Each of these concentric channels leads from the transfer passage around the bottom of the vacuum cleaner body to the opening 24 in the bottom of the body.
  • the upper wall of the space 22 curves down smoothly in a guide portion 74 having a large radius of curvature.
  • the downwardly directed aperture 24 is covered with a metal wire mesh 75 (not shown in Fig. 5) which serves to smooth turbulences in the exhaust flow on passing through the aperture 24 into the exhaust space 30 defined between the bottom of the body portion 3 and the upper surface of the castor base 4.
  • the overall exhaust flow velocity in the casing can be reduced if a portion, e.g. 10 to 20%, of the exhaust flow is allowed to pass directly (anti-clockwise) into the exit opening as shown in Figure 2.
  • the blower is very powerful, the overall exhaust velocity can be reduced by enlarging the blower chamber. This is undesirable if, as is commonly the case, there is only restricted space inside the cleaner body 1, and it is not wished to enlarge the body. Accordingly, in manufacture, it is necessary to consider the performance of the intended blower 7 and to configure the inside of the blower casing and its lining so as to obtain if necessary a proportion of direct (non-swirled) or reverse flow into the transfer passage.
  • the double-curved configuration of the exhaust passage 73 brings the air flow conveniently down into the lower horizontal plane of the annular noise reduction space 19, into which the air flow can pass still without negotiating any sharp radius.
  • the flow is guided around the C-shape channels, being prevented by the ribs 61 from concentrating at the outside of the annular space. Accordingly, good use is made of the sound absorbing layer 20 over the full extent of the space 19.
  • the air flow is guided down smoothly by the guide portion 74, smoothed by the wire net 75 and passes into the exhaust space 30 between body and castor base. At this point the flow does undergo a sharp change in direction, since it meets the castor base surface substantially perpendicularly.
  • the vent aperture 24 is made large so that the vent velocity of the exhaust air is low and noise generation by collision with the castor base is not significant.
  • the vented air is then dispersed around the wide and flat exhaust space 30 and can escape in all directions through the narrow slot opening 76 at the periphery of the castor base. Accordingly, not only is a large exhaust area provided by this aperture 76, but also the escape flow has no particular direction. This further reduces the impression of noise emanating from the vacuum cleaner. Because the final exit from the vacuum cleaner is not downward, the exhaust flow does not blow up dust form the floor.
  • the second embodiment shows further developments in the form of the blower casing and of the dust collecting chamber.
  • Figs. 7 and 10 show how the front part 17 of the blower casing, rather than being flat and forming an angle where it meets the rear part 16 at its edge, is smoothly curved at that edge around substantially all of its circumference.
  • the curve curves smoothly around at least most of a right-angle in a radial plane.
  • the front air inlet opening of the blower casing has a rearwardly-extending annular rib 17a supporting the blower motor mount 36.
  • the blower chamber wall is made primarily of plastic 2 mm thick, and the curvature of the curved surface portions is less than 100 mm.
  • the wall 58 of the casing 31 around the dust collecting chamber 9 has a special shape. This is generally four-sided, to exploit as much as possible of the available internal body space in the cleaner. However, the side walls 58 are nevertheless outwardly convex all the way around. They have a double-layer composite structure with aluminium and plastics layers. The outer (aluminium) layer is 0.5 mm thick. The maximum side wall radius of curvature is 300 mm.
  • a microfilter 33 is provided just in front of the opening into the blower casing. This filter is not intended to be removed by the user as a matter of routine, and is designed to remove dust of particle size from 0.3 microns up. By saying “removed” herein, we mean that at least 99% of such dust is removed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)

Claims (17)

  1. Aspirateur de poussières présentant un corps externe, un premier boîtier (16,17) monté à l'intérieur du corps à travers au moins un élément isolant des vibrations (68,69), et un ventilateur aspirant électrique (7) monté dans le premier boitier à travers au moins un élément isolant des vibrations (36), avec un deuxième boîtier (31) à l'intérieur du corps, une chambre de ramassage de poussières dans le deuxième boîtier, un passage pour le flux d'air aspiré de la chambre de ramassage de poussières vers le premier boîtier (16,17), et un élément d'étanchéité isolant des vibrations connectant de manière étanche les premier et deuxième boîtiers, de façon à réaliser un joint d'étanchéité autour dudit passage d'air d'aspiration.
  2. Aspirateur de poussières selon la revendication 1, dans lequel l'élément d'étanchéité est un joint élastique maintenu comprimé entre les premier et deuxième boîtiers.
  3. Aspirateur de poussières selon la revendication 2, dans lequel ledit deuxième boitier présente une saillie annulaire autour dudit passage, et ledit élément d'étanchéité vient en contact avec la surface externe de ladite saillie.
  4. Aspirateur de poussières selon l'une des revendications 1 à 3, dans lequel ledit premier boîtier est constitué de parois enfermant sensiblement complètement ledit ventilateur aspirant à l'exception dudit passage et d'au moins une sortie d'air d'aspiration, et au moins 70% de la zone desdites parois de boîtier présentent une courbure dans au moins un plan.
  5. Aspirateur de poussières selon la revendication 4, dans lequel au moins 80% de la zone des parois de boîtier du premier boîtier ont une courbure dans au moins un plan.
  6. Aspirateur de poussières selon la revendication 4 ou la revendication 5, dans lequel le ventilateur aspirant est entouré latéralement relativement à son axe de rotation par des parois dudit premier boîtier (16, 17) qui sont courbées de façon convexe vers l'extérieur, et le premier boîtier est supporté à une extrémité axiale opposée à son passage d'entrée d'air par un élément de support annulaire (68), le premier boîtier possédant une portion de paroi courbée de façon convexe vers l'extérieur (14) à la région radialement à l'intérieur dudit élément de support.
  7. Aspirateur de poussières selon la revendication 6, dans lequel une portion de paroi (16) de l'extrémité axiale du premier boîtier opposée à ladite entrée d'air, cette portion de paroi se trouvant radialement à l'extérieur dudit élément de support, est concave vers l'extérieur, et un élément absorbant le son (18) est monté à l'intérieur du premier boîtier entre une portion de paroi latérale cylindrique du boîtier et ladite portion de paroi concave vers l'extérieur.
  8. Aspirateur de poussières selon l'une des revendications 4 à 7, dans lequel le premier boîtier est supporté à une extrémité axiale présentant un passage d'air d'entrée par un élément de support annulaire (69) s'étendant autour du passage d'air d'entrée, et une paroi d'extrémité axiale du premier boîtier radialement à l'extérieur dudit élément de support annulaire (69) a une forme convexe vers l'extérieur.
  9. Aspirateur de poussières selon l'une des revendications 1 à 8, dans lequel ledit deuxième boîtier (31) présente au moins deux parois latérales qui ont au moins partiellement une forme courbée.
  10. Aspirateur de poussières selon l'une des revendications 1 à 9, le deuxième boitier (31) présentant des parois d'extrémité opposées auxquelles l'air d'aspiration entre et sort et des parois latérales reliant lesdites parois d'extrémité, sensiblement l'ensemble desdites parois latérales étant courbées de façon convexe vers l'extérieur.
  11. Aspirateur de poussières selon la revendication 10, dans lequel une paroi d'extrémité comprend un couvercle de chambre de ramassage de poussières auquel un tuyau d'aspiration (62) est connecté, cette paroi d'extrémité étant au moins partiellement courbée de façon convexe vers l'extérieur.
  12. Aspirateur de poussières selon la revendication 11, dans lequel ledit couvercle de chambre de ramassage de poussières est orienté horizontalement, le tuyau d'aspiration est connecté à celui-ci au-dessus de son niveau médian, et le couvercle a une forme convexe vers l'extérieur (32) autour de la connexion du tuyau d'aspiration.
  13. Aspirateur de poussières selon l'une des revendications précédentes, dans lequel le premier boitier (16, 17) présente une nervure annulaire interne (17a) prévue à l'extrémité axiale autour du passage d'entrée d'air pour supporter le ventilateur aspirant, et un élément absorbant le son (18) est monté à l'intérieur du premier boîtier sur une portion de paroi convexe vers l'extérieur du boîtier.
  14. Aspirateur de poussières selon l'une des revendications précédentes, dans lequel des parois du premier boîtier (16, 17) et/ou du deuxième boitier (31) ont une structure en deux couches comprenant une couche métallique et une couche en matière plastique.
  15. Aspirateur de poussières selon la revendication 14, dans lequel le métal est de l'aluminium.
  16. Aspirateur de poussières selon la revendication 14 ou la revendication 15, dans lequel le rayon de courbure des portions de paroi courbées de ladite structure en deux couches est inférieur à 300 mm.
  17. Aspirateur de poussières selon l'une des revendications 1 à 13, dans lequel les parois du premier boitier (16, 17) et/ou du deuxième boîtier (31) sont en matière plastique, et le rayon de courbure des portions de paroi courbées de ceux-ci est inférieur à 100 mm.
EP19910303496 1990-04-18 1991-04-18 Aspirateur de poussières Expired - Lifetime EP0453296B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2100324A JP3047984B2 (ja) 1990-04-18 1990-04-18 電気掃除機
JP100324/90 1990-04-18
JP2190540A JP2852106B2 (ja) 1990-07-20 1990-07-20 電気掃除機及び電動送風機
JP190540/90 1990-07-20

Publications (2)

Publication Number Publication Date
EP0453296A1 EP0453296A1 (fr) 1991-10-23
EP0453296B1 true EP0453296B1 (fr) 1994-11-02

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EP19910303496 Expired - Lifetime EP0453296B1 (fr) 1990-04-18 1991-04-18 Aspirateur de poussières

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EP (1) EP0453296B1 (fr)
DE (1) DE69104891T2 (fr)

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ITMO20050279A1 (it) * 2005-10-21 2007-04-22 Massimiliano Pineschi Apparato di aspirazione
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Publication number Priority date Publication date Assignee Title
US8344562B2 (en) 2009-04-21 2013-01-01 Samsung Electronics Co., Ltd. Fan motor apparatus for vacuum cleaner

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DE69104891D1 (de) 1994-12-08
EP0453296A1 (fr) 1991-10-23
DE69104891T2 (de) 1995-03-16

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