EP0099466B1 - Suction apparatus for dirt - Google Patents

Suction apparatus for dirt Download PDF

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Publication number
EP0099466B1
EP0099466B1 EP83105740A EP83105740A EP0099466B1 EP 0099466 B1 EP0099466 B1 EP 0099466B1 EP 83105740 A EP83105740 A EP 83105740A EP 83105740 A EP83105740 A EP 83105740A EP 0099466 B1 EP0099466 B1 EP 0099466B1
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EP
European Patent Office
Prior art keywords
air
vacuum cleaner
blower
accordance
motor
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
Application number
EP83105740A
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German (de)
French (fr)
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EP0099466A1 (en
EP0099466B2 (en
Inventor
Guido Oberdorfer
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WAP Reinigungssysteme GmbH and Co
Original Assignee
WAP Reinigungssysteme GmbH and Co
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Application filed by WAP Reinigungssysteme GmbH and Co filed Critical WAP Reinigungssysteme GmbH and Co
Priority to AT83105740T priority Critical patent/ATE29654T1/en
Publication of EP0099466A1 publication Critical patent/EP0099466A1/en
Application granted granted Critical
Publication of EP0099466B1 publication Critical patent/EP0099466B1/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/0081Means for exhaust-air diffusion; Means for sound or vibration damping
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/112Ducts

Definitions

  • the invention relates to a vacuum cleaner with a housing and with a blower arranged in the housing cover and driven by a motor, the cooling air of the motor and the exhaust air of the blower being guided separately to each outlet via multiply wound outlet paths provided with a sound-absorbing lining.
  • the invention is therefore based on the object of proposing a vacuum cleaner with the features mentioned at the outset, which is distinguished by a noticeably improved sound insulation.
  • the invention is characterized in that the outlet paths change discontinuously several times in cross section and in that multiple deflection takes place on sharp edges.
  • a motor housing 3 is mounted on a carrier plate 1 with the aid of rubber sealing lips or foam strips 2.
  • the motor housing 3 consists of a wide turbine part 3a and a narrower motor part 3b, on the top of which a radial fan 4 is arranged. This radial fan sucks in the cooling air in the direction of arrow 5, which is blown out at a blow-out opening 5a and rises in the direction of arrow 6 on the wall of an intermediate plate to be described later.
  • the fan 3 also has a multi-stage turbine wheel 7, by means of which the suction air is sucked in via the suction connection, not shown in detail, via a suction hose via a filter and flows in the direction of the arrow 8 via a suction opening 9 on the underside of the fan 3. According to the invention, this suction air is essentially soundproofed.
  • an air grille 10 which has a mesh size of 3-8 mm and consists of square plastic rods, this grille showing the essential advantage that the suction air inflow drawn in in the direction of the arrow 8 is evened out. Above all, harmful eddies are avoided at the edges of the suction opening 9, which lead to corresponding whistling noises.
  • the square ribs of this plastic grille are rounded on the intake side.
  • the turbine wheel 7 has radial blow-out openings 11 through which the exhaust air flows in the direction of the arrow 12 via a channel 13.
  • the channel 13 is formed by an upwardly projecting flange 14 of the carrier plate 1, this channel wall being lined with a sound absorbing mat 15. It is essential that the channel narrows in cross section 13a, so that the air flowing through it receives a substantial acceleration.
  • the other side of the channel is formed by the wall 16 of a clamping plate 18, the air being deflected at an edge 17 to the front side of the clamping plate 18 lined with damping strips 15.
  • the air flow is introduced into an annular channel 20 in the direction of arrow 19 (cf. FIG. 2).
  • the ring channel 20 runs semicircularly around the housing. It is formed by two partial ring channels, which are approximately symmetrical to each other, as shown in Fig. 1 on the right side.
  • the ring channels 20 are not exactly symmetrical to each other. They differ from each other in the radii.
  • the ring channel on the left in FIG. 1 is described below with reference to FIG. 2. It can be seen that the air flows in the direction of arrow 21 into a housing opening 22, which can also be seen in FIG. 1.
  • This housing opening 22 is partitioned off by a web 24 of the clamping plate 18, so that the air flows in the arrow direction 25 through a channel 26, 27 designed as a chicane in the arrow direction 28, is again deflected in the arrow direction 29 on a web 30 of the clamping plate, and in the arrow direction 31 from an exhaust vent in the Carrier plate flows out and exits the housing there.
  • the air can also flow further in the annular channel 20 in the direction of the arrow 32 and enter a chamber 37 in the direction of the arrow 36 via an inflow opening 33.
  • the inflow opening 33 is formed by a rib 34 of the clamping plate and an adjacent rib 35.
  • the chamber 37 leads into a further sound-damped channel 38, all the surfaces lying in the drawing plane in FIG. 2 being lined with foam mats.
  • the air then flows in the direction of arrow 39 and then reaches a blow-out opening 40, which is arranged in a hood 41, on a very long path in the region of the channel 38.
  • a triple-deflected baffle was therefore chosen on the right, upper side of FIG. 2 in order to obtain relatively the same silenced path as on the left-hand side with the chamber 38, which only requires a single baffle, but a long, straight damped path.
  • suction takes place via the suction opening 42 according to FIG. 2, which in FIG. 1 is located approximately in the area below this plate.
  • the air passes through a relatively wide duct 44, which is lined with appropriate soundproofing mats, into a chamber 45, where it is deflected in the direction of arrow 43, and is fed via a radially extending duct 46 to the radial fan 4 of the drive motor.
  • chamber 47 is also heavily damped with sound absorption mats, so that all air-contacting paths of the cooling air are lined with corresponding sound absorption mats.
  • the fan 4 now draws in the cooling air, directs this cooling air via the motor windings in the direction of the arrow 48, which then enters a chamber 50 via a blow-out opening 49 (not shown in more detail) on the motor housing and is deflected there in the direction of the arrow 6 via an annular duct 51 and a wall 52 , which has a breakthrough that cannot be seen in FIG. 1. From there, the air enters an annular space 53 (arrow direction 54), which extends practically over 270 degrees of the housing, wherein in this annular space 53 electronic components of the device are advantageously arranged, which are acted upon by this cooling air and thereby be cooled.
  • the electronic components consist, for example, of a triac for an automatic on / off switch with an associated suppressor choke and similar parts which generate a significant amount of waste heat and which are also cooled as a result.
  • the air then flows out of the clamping plate via a housing opening 55 according to FIG. 2.
  • This housing opening 55 lies below the horizontal part 56 of the carrier plate 1 and cannot be seen in FIG. 1.
  • the sound absorbing mats preferably consist of a foam or of a closed-pore cellular rubber, a layer of bitumen mats 57 preferably being underlaid in order to ensure broadband noise damping.
  • the housing hood 41 and the clamping plate 18 are made of injection-molded plastic parts, as is the bearing plate 56. It is also essential in the present invention that a downwardly open channel 58 is arranged on the horizontal part 56 of the carrier plate 1 by a U-shaped one profiled seal 59 is arranged, in whose downwardly open U-profile the edge of the upwardly open vacuum cleaner container is inserted. As a result, further noise reduction is achieved and at the same time a seal and thus a simultaneous centering of the bearing plate 1 to the dirt suction container, i.e. no solid parts touch, vibration transmission is avoided.
  • the sound damping measures according to the invention are extremely inexpensive to manufacture because all parts consist of injection molded parts that only have corresponding soundproofing measures on the inside, ie. H. sound absorption mats and bitumen mats must be lined.
  • Helmholz resonators it is also possible to use Helmholz resonators; it is also possible, according to FIGS. 3 and 4, and according to FIGS. 5 and 6, to arrange either a muffler lined with mineral wool or an absorption damper or reflection damper (according to FIGS. 5 and 6) in the intake area of the engine, namely in the area of the air grille 10 and the suction opening 9.
  • a plug-in collar is arranged flush with the outer edge of the suction opening 9, with which the silencers shown in FIGS. 3-6 with their associated collars 60, 61 are inserted.
  • FIG. 6 shows the inner part for the silencer according to FIG. 5.
  • the inner part 62 is inserted axially into the part 63 according to FIG. 5, as is indicated in pencil in FIG. 5.
  • the air is drawn in in the direction of the arrow 65, deflected in the direction of the arrow 67 via the tabs 66, guided downward in the direction of the arrow 68 and in the direction of the arrow 69 via the inner pot 70 of the muffler to the suction opening 9 of the support plate 1.
  • a narrow copper strip 71 is arranged in the area of the U-profiled sealing lip 59, the shape of which is adapted to the U-profile and is seated on the metal edge of the vacuum cleaner container in an electrically conductive manner. 1, this copper strip is connected to the protective conductor of the mains voltage via a conductor lug 72 and a connection 73, so that the electrostatic charges which arise on the vacuum cleaner container are discharged to the mains line 73 via this copper conductor 71.
  • the low-vibration fastening of the blower and the soft rubber rings effecting the blower motor must have a corresponding Shore hardness and dimension and at the same time be designed in such a way that the turbine is secured against twisting.
  • the dimensions of the air gaps and air chambers must also be adjusted accordingly, essentially as shown in the drawing.
  • the parameters channel width, channel height and channel length are important.
  • the coordination of the sound absorption mats and the placement of the mats in the right place are also essential.
  • the sucked-in and blown-out cooling air must also be guided, as explained above, in order to keep the sound pressure level as low as possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Bridges Or Land Bridges (AREA)
  • Golf Clubs (AREA)
  • Prevention Of Fouling (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Electric Suction Cleaners (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

A vacuum cleaner apparatus having separate passages for outgoing air from the blower and for cooling air for the blower motor, and having a number of turns in each of said passages, each of said passages having a plurality of variations in cross-sectional area, the passages being provided with sound-absorbent linings.

Description

Die Erfindung betrifft einen Schmutzsauger mit einem Gehäuse und mit einem im Gehäusedeckel angeordneten, von einem Motor angetriebenen Gebläse, wobei die Kühlluft des Motors und die Abluft des Gebläses getrennt voneinander über mehrfach gewundene, mit einer schallschluckenden Auskleidung versehene Auslasswege zu jeweils einem Auslass geführt werden.The invention relates to a vacuum cleaner with a housing and with a blower arranged in the housing cover and driven by a motor, the cooling air of the motor and the exhaust air of the blower being guided separately to each outlet via multiply wound outlet paths provided with a sound-absorbing lining.

Einen derartigen Schmutzsauger beschreibt die DE-A-3 023 630. Der dort vorgesehene Auslassweg ist spiralig angelegt und vergrössert sich in seinem Querschnitt stetig vom Einlass zum Auslass hin, ohne dass hierbei eine wesentliche Strömungsumlenkung gegeben ist. Es liegt hier also ein relativ langer Auslassweg mit nur geringer Krümmung vor, bei dem weder Umlenkungen über scharfe Kanten gegeben sind noch der im Auslassweg strömende Luftstrom beschleunigt wird. Die Schalldämpfung dieses bekannten Schmutzsaugers dürfte daher heutigen Anforderungen nicht mehr genügen.Such a vacuum cleaner is described in DE-A-3 023 630. The outlet path provided there is spirally arranged and its cross section increases continuously from the inlet to the outlet without there being any substantial flow deflection. There is therefore a relatively long outlet path with only a slight curvature, in which there are neither deflections over sharp edges nor the air flow flowing in the outlet path being accelerated. The sound absorption of this known vacuum cleaner should therefore no longer meet today's requirements.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Schmutzsauger mit den eingangs genannten Merkmalen vorzuschlagen, der sich durch eine fühlbar verbesserte Schalldämmung auszeichnet.The invention is therefore based on the object of proposing a vacuum cleaner with the features mentioned at the outset, which is distinguished by a noticeably improved sound insulation.

Zur Lösung dieser Aufgabe ist die Erfindung dadurch gekennzeichnet, dass die Auslasswege sich mehrfach im Querschnitt unstetig ändern und dass eine mehrfache Umlenkung an scharfen Kanten stattfindet.To achieve this object, the invention is characterized in that the outlet paths change discontinuously several times in cross section and in that multiple deflection takes place on sharp edges.

Durch diese Merkmale wird die in die Auslasswege eintretende Luft abwechselnd mehrfach beschleunigt bzw. verlangsamt. Verbunden mit der erwähnten mehrfachen Umlenkung an den scharfen Kanten ergibt sich in überraschender Weise eine fühlbare und unerwartete Verringerung des Schallpegels. Versuche haben ergeben, dass der erfindungsgemässe Schmutzsauger einen Schallpegel von etwa 60 dB A hat. Diese Angabe ist naturgemäss von der jeweils getroffenen Dimensionierung des Schmutzsaugers insgesamt abhängig und daher in keiner Weise einschränkend zu verstehen.These features alternately accelerate or slow down the air entering the exhaust paths several times. Coupled with the multiple deflection mentioned on the sharp edges, a surprising and unexpected reduction in the sound level results. Tests have shown that the vacuum cleaner according to the invention has a sound level of approximately 60 dB A. This information is of course dependent on the dimensions of the vacuum cleaner taken as a whole and is therefore not to be understood in any way restrictive.

Vorteilhafte Ausgestaltungen der Erfindung sind durch die abhängigen Ansprüche definiert.Advantageous embodiments of the invention are defined by the dependent claims.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen näher erläutert. Es zeigt:

  • Fig. 1 einen Längsschnitt durch den oberen Teil eines Schmutzsaugers nach der Erfindung mit Gebläse, Gebläsemotor und schalldämpfenden Massnahmen;
  • Fig. 2 eine Schnittansicht in Richtung des Pfeiles II von Figur 1;
  • Fig. 3 in einem Längsschnitt einen mit Mineralwolle ausgekleideten Schalldämpfer;
  • Fig. 4 einen Absorptionsdämpfer, ebenfalls im Längsschnitt;
  • Fig. 5 einen Reflektionsdämpfer im Längsschnitt;
  • Fig. 6 das Innenteil des Reflektionsdämpfers nach Fig. 5.
The invention is explained in more detail below on the basis of exemplary embodiments. It shows:
  • 1 shows a longitudinal section through the upper part of a vacuum cleaner according to the invention with blower, blower motor and sound-absorbing measures.
  • Figure 2 is a sectional view in the direction of arrow II of Figure 1;
  • 3 shows a longitudinal section of a muffler lined with mineral wool;
  • Figure 4 shows an absorption damper, also in longitudinal section.
  • Figure 5 shows a reflection damper in longitudinal section.
  • 6 shows the inner part of the reflection damper according to FIG. 5.

Auf einer Trägerplatte 1 ist mit Hilfe von Gummidichtlippen oder Schaumstoffstreifen 2 ein Motorgehäuse 3 gelagert. Das Motorgehäuse 3 besteht aus einem breiten Turbinenteil 3a und einem schmaleren Motorteil 3b, an dessen Oberseite ein Radial-Ventilator 4 angeordnet ist. Dieser Radial-Ventilator saugt in Pfeilrichtung 5 die Kühlluft an, die an einer Ausblasöffnung 5a ausgeblasen wird und in Pfeilrichtung 6 an der Wandung einer noch später zu beschreibenden Zwischenplatte hochsteigt.A motor housing 3 is mounted on a carrier plate 1 with the aid of rubber sealing lips or foam strips 2. The motor housing 3 consists of a wide turbine part 3a and a narrower motor part 3b, on the top of which a radial fan 4 is arranged. This radial fan sucks in the cooling air in the direction of arrow 5, which is blown out at a blow-out opening 5a and rises in the direction of arrow 6 on the wall of an intermediate plate to be described later.

Der Ventilator 3 besitzt ferner ein mehrstufiges Turbinenrad 7, mit dem die Saugluft über den Sauganschluss nicht näher dargestellten Sauggehäuse über einen Saugschlauch über ein Filter angesaugt wird und in Pfeilrichtung 8 über eine Ansaugöffnung 9 an der Unterseite des Ventilators 3 einströmt. Diese Saugluft wird nun erfindungsgemäss im wesentlichen Masse schallgedämpft.The fan 3 also has a multi-stage turbine wheel 7, by means of which the suction air is sucked in via the suction connection, not shown in detail, via a suction hose via a filter and flows in the direction of the arrow 8 via a suction opening 9 on the underside of the fan 3. According to the invention, this suction air is essentially soundproofed.

In der Ansaugöffnung 9 ist ein Luftgitter 10 vorhanden, das etwa eine Maschenweite von 3-8 mm aufweist und aus Vierkantkunststoffstäben besteht, wobei dieses Gitter den wesentlichen Vorteil zeigt, dass eine Vergleichmässigung des in Pfeilrichtung 8 eingesaugten Saugluftzustromes erfolgt. Es werden vor allem schädliche Wirbelbildungen an den Kanten der Ansaugöffnung 9 vermieden, die zu entsprechenden Pfeifgeräuschen führen. Die Vierkantrippen dieses Kunststoffgitters sind an der Ansaugseite entsprechend abgerundet.In the suction opening 9 there is an air grille 10, which has a mesh size of 3-8 mm and consists of square plastic rods, this grille showing the essential advantage that the suction air inflow drawn in in the direction of the arrow 8 is evened out. Above all, harmful eddies are avoided at the edges of the suction opening 9, which lead to corresponding whistling noises. The square ribs of this plastic grille are rounded on the intake side.

Das Turbinenrad 7 weist radiale Ausblasöffnungen 11 auf, durch die die Abluft in Pfeilrichtung 12 über einen Kanal 13 strömt. Der Kanal 13 wird durch einen nach oben ragenden Flansch 14 der Trägerplatte 1 gebildet, wobei diese Kanalwandung mit einer Schallschluckmatte 15 ausgekleidet ist. Wesentlich ist, dass der Kanal sich im Querschnitt 13a verengt, so dass die hier hindurchströmende Luft eine wesentliche Beschleunigung erhält. Die andere Seite des Kanals wird durch die Wandung 16 einer Spannplatte 18 gebildet, wobei die Luft an einer Kante 17 an die mit Dämpfstreifen 15 ausgekleidete Stirnseite der Spannplatte 18 umgelenkt wird. Die Luftströmung wird in Pfeilrichtung 19 in einen Ringkanal 20 eingeleitet (vgl. Fig. 2).The turbine wheel 7 has radial blow-out openings 11 through which the exhaust air flows in the direction of the arrow 12 via a channel 13. The channel 13 is formed by an upwardly projecting flange 14 of the carrier plate 1, this channel wall being lined with a sound absorbing mat 15. It is essential that the channel narrows in cross section 13a, so that the air flowing through it receives a substantial acceleration. The other side of the channel is formed by the wall 16 of a clamping plate 18, the air being deflected at an edge 17 to the front side of the clamping plate 18 lined with damping strips 15. The air flow is introduced into an annular channel 20 in the direction of arrow 19 (cf. FIG. 2).

Der Ringkanal 20 läuft halbkreisförmig um das Gehäuse herum. Er wird von zwei Teil-Ringkanälen gebildet, die zueinander etwa symmetrisch sind, wie es in Fig. 1 auf der rechten Seite dargestellt ist.The ring channel 20 runs semicircularly around the housing. It is formed by two partial ring channels, which are approximately symmetrical to each other, as shown in Fig. 1 on the right side.

Die Ringkanäle 20 sind nicht genau zueinander symmetrisch. Sie weichen in den Radien voneinander ab. Im folgenden wird der Ringkanal links in Fig. 1 anhand von Fig. 2 beschrieben. Man sieht, dass die Luft in Pfeilrichtung 21 in eine Gehäuseöffnung 22 einströmt, die auch in Fig. 1 zu sehen ist. Diese Gehäuseöffnung 22 wird durch einen Steg 24 der Spannplatte 18 abgeteilt, so dass die Luft in Pfeilrichtung 25 einen als Schikane ausgebildeten Kanal 26, 27 in Pfeilrichtung 28 durchströmt, in Pfeilrichtung 29 wiederum an einem Steg 30 der Spannplatte umgelenkt wird, und in Pfeilrichtung 31 aus einer Abluftöffnung in der Trägerplatte entströmt und dort aus dem Gehäuse austritt.The ring channels 20 are not exactly symmetrical to each other. They differ from each other in the radii. The ring channel on the left in FIG. 1 is described below with reference to FIG. 2. It can be seen that the air flows in the direction of arrow 21 into a housing opening 22, which can also be seen in FIG. 1. This housing opening 22 is partitioned off by a web 24 of the clamping plate 18, so that the air flows in the arrow direction 25 through a channel 26, 27 designed as a chicane in the arrow direction 28, is again deflected in the arrow direction 29 on a web 30 of the clamping plate, and in the arrow direction 31 from an exhaust vent in the Carrier plate flows out and exits the housing there.

Die Luft kann aber ebenso, anstatt in Pfeilrichtung 21 in die Öffnung 23 einzuströmen, in Pfeilrichtung 32 weiter im Ringkanal 20 entlangströmen und in Pfeilrichtung 36 über eine Einströmöffnung 33 in einer Kammer 37 eintreten.However, instead of flowing into the opening 23 in the direction of the arrow 21, the air can also flow further in the annular channel 20 in the direction of the arrow 32 and enter a chamber 37 in the direction of the arrow 36 via an inflow opening 33.

Die Einströmöffnung 33 ist durch eine Rippe 34 der Spannplatte und eine benachbarte Rippe 35 gebildet. Die Kammer 37 führt in einen weiteren schallgedämpften Kanal 38, wobei sämtliche in Fig. 2 in der Zeichenebene liegenden Flächen mit Schaumstoffmatten ausgekleidet sind. Die Luft strömt dann in Pfeilrichtung 39 weiter und gelangt dann auf einem sehr langen Weg im Bereich des Kanals 38 zu einer Ausblasöffnung 40, die in einer Haube 41 angeordnet ist.The inflow opening 33 is formed by a rib 34 of the clamping plate and an adjacent rib 35. The chamber 37 leads into a further sound-damped channel 38, all the surfaces lying in the drawing plane in FIG. 2 being lined with foam mats. The air then flows in the direction of arrow 39 and then reaches a blow-out opening 40, which is arranged in a hood 41, on a very long path in the region of the channel 38.

Auf der rechten, oberen Seite von Fig. 2 wurde eine dreifach umgelenkte Schikane deshalb gewählt, um relativ den gleichen schallgedämpften Weg zu gewinnen, wie auf der linken Seite mit der Kammer 38, die nur mit einer einzigen Umlenkschikane auskommt, dafür aber einen langen, geraden gedämpften Weg aufweist.A triple-deflected baffle was therefore chosen on the right, upper side of FIG. 2 in order to obtain relatively the same silenced path as on the left-hand side with the chamber 38, which only requires a single baffle, but a long, straight damped path.

Weiter wesentlich für den Erfolg der Schallschutzmassnahme ist, dass die Luft, die mit grossem Volumen in den Ringkanal 20 eintritt, zunächst an den Umlenkschikanen sehr stark beschleunigt wird, um dann in danach geschalteten Ausdehnungsräumen wieder verlangsamt zu werden. Hierdurch gelingt es, eine breitbandige Schalldämpfung zu erreichen, nachdem sämtliche Deckflächen, die in Fig. 2 in der Zeichenebene liegen, mit Schallschutzmatten ausgekleidet sind.It is also essential for the success of the soundproofing measure that the air which enters the annular duct 20 with a large volume is first accelerated very strongly at the deflection baffles, in order to then be slowed down again in the expansion spaces connected thereafter. In this way, it is possible to achieve broadband sound attenuation after all the cover surfaces, which lie in the drawing plane in FIG. 2, are lined with soundproofing mats.

Im folgenden wird die Schalldämpfung der Motorkühlluft anhand von Fig. 1 erläutert.The sound damping of the engine cooling air is explained below with reference to FIG. 1.

In Fig. 1 wird über die Ansaugöffnung 42 gemäss Fig. 2 angesaugt, die sich in Fig. 1 etwa im Bereich unterhalb dieser Platte befindet. Die Luft gelangt über einen relativ breiten Kanal 44, der mit entsprechenden Schallschutzmatten ausgekleidet ist, in eine Kammer 45, wo sie in Pfeilrichtung 43 umgelenkt wird, und über einen radial sich erstreckenden Kanal 46 zum Radial-Ventilator 4 des Antriebsmotors zugeführt wird. Wichtig ist hierbei, dass auch die Kammer 47 sehr stark mit Schallschluckmatten bedämpft ist, so dass sämtliche luftberührten Wege der Kühlluft mit entsprechenden Schallschluckmatten ausgekleidet sind. Der Ventilator 4 saugt nun die Kühlluft an, leitet diese Kühlluft über die Motorwicklungen in Pfeilrichtung 48, die dann über eine nicht näher dargestellte Ausblasöffnung 49 am Motorgehäuse in eine Kammer 50 eintritt und dort in Pfeilrichtung 6 über einen Ringkanal 51 und eine Wand 52 umgelenkt wird, die einen Durchbruch aufweist, der in Fig. 1 nicht zu entnehmen ist. Von dort gelangt die Luft in einen Ringraum 53 hinein (Pfeilrichtung 54), der sich praktisch über 270 Grad des Gehäuses erstreckt, wobei in diesen Ringraum 53 in vorteilhafter Weise noch Elektronik-Komponenten des Geräts angeordnet sind, die von dieser Kühlluft mit beaufschlagt und dadurch gekühlt werden. Die Elektronik-Komponenten bestehen beispielsweise aus einem Triak für eine Ein-Ausschalt-Automatik mit einer zugeordneten Entstördrossel und ähnlichen Teilen, die eine wesentliche Abwärme erzeugen und die hierdurch auch gekühlt werden. Die Luft entströmt dann über eine Gehäuseöffnung 55 gemäss Fig. 2 aus der Spannplatte heraus.In FIG. 1, suction takes place via the suction opening 42 according to FIG. 2, which in FIG. 1 is located approximately in the area below this plate. The air passes through a relatively wide duct 44, which is lined with appropriate soundproofing mats, into a chamber 45, where it is deflected in the direction of arrow 43, and is fed via a radially extending duct 46 to the radial fan 4 of the drive motor. It is important here that chamber 47 is also heavily damped with sound absorption mats, so that all air-contacting paths of the cooling air are lined with corresponding sound absorption mats. The fan 4 now draws in the cooling air, directs this cooling air via the motor windings in the direction of the arrow 48, which then enters a chamber 50 via a blow-out opening 49 (not shown in more detail) on the motor housing and is deflected there in the direction of the arrow 6 via an annular duct 51 and a wall 52 , which has a breakthrough that cannot be seen in FIG. 1. From there, the air enters an annular space 53 (arrow direction 54), which extends practically over 270 degrees of the housing, wherein in this annular space 53 electronic components of the device are advantageously arranged, which are acted upon by this cooling air and thereby be cooled. The electronic components consist, for example, of a triac for an automatic on / off switch with an associated suppressor choke and similar parts which generate a significant amount of waste heat and which are also cooled as a result. The air then flows out of the clamping plate via a housing opening 55 according to FIG. 2.

Diese Gehäuseöffnung 55 liegt unterhalb des horizontalen Teils 56 der Trägerplatte 1 und ist in Fig. 1 nicht zu erkennen.This housing opening 55 lies below the horizontal part 56 of the carrier plate 1 and cannot be seen in FIG. 1.

Wesentlich ist auch hier, dass bei der Motorkühlluft sämtliche luftberührten Räume schallgedämpft sind, und die Luft mehrfach über Schikanen umgelenkt wird, so dass hier auch eine wesentliche Geräuschdämpfung der Motorkühlluft erfolgt.It is also important here that all rooms in contact with the air in the engine cooling air are soundproofed and the air is deflected several times by means of baffles, so that the engine cooling air is also substantially dampened here.

Die Schallschluckmatten bestehen vorzugsweise aus einem Schaumstoff oder aus einem geschlossen-porigen Moosgummi, wobei bevorzugt noch eine Schicht von Bitumenmatten 57 unterlegt ist, um eine breitbandige Geräuschdämpfung zu gewährleisten.The sound absorbing mats preferably consist of a foam or of a closed-pore cellular rubber, a layer of bitumen mats 57 preferably being underlaid in order to ensure broadband noise damping.

Die Gehäusehaube 41 und die Spannplatte 18 bestehen aus Kunststoff-Spritzgussteilen, ebenso die Lagerplatte 56. Wesentlich bei der vorliegenden Erfindung ist auch, dass am horizontalen Teil 56 der Trägerplatte 1 ein nach unten geöffneter Kanal 58 radial umlaufend angeordnet ist, indem eine U-förmige profilierte Dichtung 59 angeordnet ist, in deren nach unten offenem U-Profil der Rand des nach oben offenen Schmutzsaugerbehälters eingesetzt wird. Hierdurch wird eine weitere Geräuschdämpfung erzielt und gleichzeitig eine Abdichtung und damit eine gleichzeitige Zentrierung von Lagerplatte 1 zu dem Schmutzsaugerbehälter, d.h. es berühren sich keine festen Teile, eine Schwingungsübertragung wird vermieden.The housing hood 41 and the clamping plate 18 are made of injection-molded plastic parts, as is the bearing plate 56. It is also essential in the present invention that a downwardly open channel 58 is arranged on the horizontal part 56 of the carrier plate 1 by a U-shaped one profiled seal 59 is arranged, in whose downwardly open U-profile the edge of the upwardly open vacuum cleaner container is inserted. As a result, further noise reduction is achieved and at the same time a seal and thus a simultaneous centering of the bearing plate 1 to the dirt suction container, i.e. no solid parts touch, vibration transmission is avoided.

Die Schalldämpfungsmassnahmen nach der Erfindung sind ausserordentlich kostengünstig herzustellen, weil sämtliche Teile aus Spritzgussteilen bestehen, die nur innen mit entsprechenden Schallschutzmassnahmen, d. h. also Schallschluckmatten und Bitumenmatten ausgekleidet werden müssen.The sound damping measures according to the invention are extremely inexpensive to manufacture because all parts consist of injection molded parts that only have corresponding soundproofing measures on the inside, ie. H. sound absorption mats and bitumen mats must be lined.

Es ist möglich, zusätzlich Helmholz-Resonatoren zu verwenden; ebenso ist es möglich, gemäss Fig. 3 und Fig. 4, sowie gemäss Fig. 5 und Fig. 6, entweder einen mit Mineralwolle ausgekleideten Schalldämpfer oder einen Absorptionsdämpfer bzw. Reflektionsdämpfer (gemäss Fig. 5 und 6) im Ansaugbereich des Motors anzuordnen, nämlich im Bereich des Luftgitters 10 und der Ansaugöffnung 9. In diesem Fall ist bündig mit dem Aussenrand der Ansaugöffnung 9 ein Steckkragen angeordnet, mit dem die in den Fig. 3-6 gezeigten Schalldämpfer mit ihren zugeordneten Kragen 60, 61 eingesteckt werden.It is also possible to use Helmholz resonators; it is also possible, according to FIGS. 3 and 4, and according to FIGS. 5 and 6, to arrange either a muffler lined with mineral wool or an absorption damper or reflection damper (according to FIGS. 5 and 6) in the intake area of the engine, namely in the area of the air grille 10 and the suction opening 9. In this case, a plug-in collar is arranged flush with the outer edge of the suction opening 9, with which the silencers shown in FIGS. 3-6 with their associated collars 60, 61 are inserted.

Fig. 6 zeigt das Innenteil für den Schalldämpfer nach Fig. 5. Das Innenteil 62 wird axial in das Teil 63 nach Fig. 5 eingesteckt, so wie es in Fig. 5 mit Bleistift angedeutet ist. Die Luft wird in Pfeilrichtung 65 angesaugt, über die Laschen 66 in Pfeilrichtung 67 umgelenkt, in Pfeilrichtung 68 nach unten geführt und in Pfeilrichtung 69 über den inneren Topf 70 des Schalldämpfers zur Ansaugöffnung 9 der Tragplatte 1 geführt.FIG. 6 shows the inner part for the silencer according to FIG. 5. The inner part 62 is inserted axially into the part 63 according to FIG. 5, as is indicated in pencil in FIG. 5. The air is drawn in in the direction of the arrow 65, deflected in the direction of the arrow 67 via the tabs 66, guided downward in the direction of the arrow 68 and in the direction of the arrow 69 via the inner pot 70 of the muffler to the suction opening 9 of the support plate 1.

Ähnliche Verhältnisse bestehen auch bei der Fig. 3, wo ein bedämpfter Schalldämpfer verwendet wird. Ebenso ist es möglich, auf der Motorkühlluftseite einen bedämpften Helmholz-Resonator einzubauen, der bevorzugt im Bereich des Ringkanals 45 angeordnet ist, der nicht selbst von Luft durchströmt ist, sondern der als Hohlkörper an seinen Aussenwandungen in das inneführende Bohrungen genau festgelegten Durchmessers und Abstandes aufweist, so dass die angesaugte Kühlluft mit der Oberfläche hinweggeführt wird und über den Bohrungsrand dieser Bohrungen strömt und hierdurch ebenfalls ein Dämpfungseffekt erzielt wird.Similar relationships also exist in FIG. 3, where a damped silencer is used. It is also possible to install an attenuated Helmholz resonator on the engine cooling air side, which is preferably arranged in the area of the ring channel 45, which is not itself flowed through by air, but which has a hollow body on its outer walls in the inside bores of precisely defined diameter and distance , so that the sucked-in cooling air is carried away with the surface and flows over the edge of the bore of these bores, thereby also achieving a damping effect.

Im Bereich der U-profilierten Dichtlippe 59 ein schmaler Kupferstreifen 71 angeordnet ist, der in seiner Formgebung dem U-Profil angepasst ist und der elektrisch leitfähig auf dem Metallrand des Schmutzsaugerbehälters aufsitzt. Dieser Kupferstreifen ist gemäss Fig. 1 über eine Leiterfahne 72 und einen Anschluss 73 mit dem Schutzleiter der Netzspannung verbunden, so dass die am Schmutzsaugerbehälter entstehenden, elektrostatischen Aufladungen über diesen Kupferleiter 71 an die Netzleitung 73 abgeleitet werden.A narrow copper strip 71 is arranged in the area of the U-profiled sealing lip 59, the shape of which is adapted to the U-profile and is seated on the metal edge of the vacuum cleaner container in an electrically conductive manner. 1, this copper strip is connected to the protective conductor of the mains voltage via a conductor lug 72 and a connection 73, so that the electrostatic charges which arise on the vacuum cleaner container are discharged to the mains line 73 via this copper conductor 71.

Die schwingungsarme Befestigung des Gebläses und des Gebläsemotors bewirkenden Weichgummiringe müssen eine entsprechende Shore-Härte und Abmessung haben und gleichzeitig so ausgeführt sein, dass die Turbine gegen ein Verdrehen gesichert ist. Die Luftstrecken und Luftkammern müssen in ihren Dimensionierungen ebenfalls entsprechend abgestimmt werden, im wesentlichen wie zeichnerisch dargestellt. Wichtig sind die Parameter Kanalbreite, Kanalhöhe und Kanallänge. Auch die Abstimmung der Schallschluckmatten sowie die Einbringung der Matten an der richtigen Stelle sind wesentlich. Die angesaugte und ausgeblasene Kühlluft muss ebenfalls, wie vorstehend erläutert, geführt werden, um auch hier den Schalldruckpegel möglichst gering zu halten.The low-vibration fastening of the blower and the soft rubber rings effecting the blower motor must have a corresponding Shore hardness and dimension and at the same time be designed in such a way that the turbine is secured against twisting. The dimensions of the air gaps and air chambers must also be adjusted accordingly, essentially as shown in the drawing. The parameters channel width, channel height and channel length are important. The coordination of the sound absorption mats and the placement of the mats in the right place are also essential. The sucked-in and blown-out cooling air must also be guided, as explained above, in order to keep the sound pressure level as low as possible.

Claims (10)

1. Vacuum cleaner with a housing and with a blower (7) for the production of suction air driven by a motor (3b) and arranged in the housing cover, whereas the cooling air of the motor (3b) and the outgoing air of the blower (7) are led separately from each other through outlet paths having twists and being fitted with a sound-absorbent coating to one outlet each, characterized in that the outlet paths (13, 20, 26, 27, 37, 38) of the outgoing air of the blower (7) change several times uneven in the cross-section and that a rerouting at sharp edges (24, 30, 34, 35) takes place several times.
2. Vacuum cleaner according to claim 1, characterized in that the canal (13) attached at the blowoff opening (11) of the blower (7) runs into a narrowed, round cross-section (13a) behind which the outgoing air is rerouted via an edge (17) and, from there, arrives in a belt canal (20).
3. Vacuum cleaner according to claim 2, characterized in that the outgoing air of the blower (7) is separated in two part air flows, and each part flows into the belt canal (20) in opposite direction, at which opening join the part air flows in the field of an inlet opening (33).
4. Vacuum cleaner according to claims 2 and 3, characterized in that the belt canal (20) shows two outlet openings (23, 33) separated from each other and arranged at the outside which run into junction canals (38, 40 and 26, 27) which are different in length and damped.
5. Vacuum cleaner in accordance with one of claims 1 to 4, characterized in that a grating (10) is arranged in front of their air inlet opening of the blower (3a) which proportionates the air flow.
6. Vacuum cleaner in accordance with one of claims 1 to 5, characterized in that a sound- damper is provided in the region of the blower motor.
7. Vacuum cleaner in accordance with one of claims 1 to 6, characterized in that the heat- producing electrical elements are arranged in the region of the cooling air path (53).
8. Vacuum cleaner in accordance with one of claims 1 to 7, characterized in that in the region of the air inlet of the radial ventilator (4) a Helmholz resonator is arranged for the motor (3b).
9. Vacuum cleaner in accordance with one of the claims 1 to 8, characterized in that the housing (41) is rectangular to achieve wide air inlet and air outlet openings (42, 55) which is fitted on a round dirt collecting tank.
10. Vacuum cleaner in accordance with one of the claims 1 to 9, characterized in that a copper strip (71) is arranged in the housing element carrying the blower and that the static charge of the metal dirt collecting tank is led off via the protection conductor of the mains lead.
EP83105740A 1982-07-06 1983-06-11 Suction apparatus for dirt Expired - Lifetime EP0099466B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105740T ATE29654T1 (en) 1982-07-06 1983-06-11 DIRT VACUUM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3225258 1982-07-06
DE3225258A DE3225258C2 (en) 1982-07-06 1982-07-06 Vacuum cleaner

Publications (3)

Publication Number Publication Date
EP0099466A1 EP0099466A1 (en) 1984-02-01
EP0099466B1 true EP0099466B1 (en) 1987-09-16
EP0099466B2 EP0099466B2 (en) 1991-12-18

Family

ID=6167758

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EP83105740A Expired - Lifetime EP0099466B2 (en) 1982-07-06 1983-06-11 Suction apparatus for dirt

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US (1) US4665581A (en)
EP (1) EP0099466B2 (en)
AT (1) ATE29654T1 (en)
DE (2) DE3225258C2 (en)
ZA (1) ZA834398B (en)

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Also Published As

Publication number Publication date
EP0099466A1 (en) 1984-02-01
EP0099466B2 (en) 1991-12-18
ATE29654T1 (en) 1987-10-15
ZA834398B (en) 1984-03-28
DE3225258C2 (en) 1985-11-28
US4665581A (en) 1987-05-19
DE3225258A1 (en) 1984-01-12
DE3373618D1 (en) 1987-10-22

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