DE1951306A1 - Electric vacuum cleaner - Google Patents

Description

. H. LEINWEBER dipl-ing. H. ZIMMERMANN

Pos 19682 ^{8 MUnehen2} ' ^{Roienlal7 2 Aufe}

Τθΐ.-addr. Lelnpat Munich Terofon (0111) 26198 »

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Our drawing

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MAISUSHIIAELBOiDEIO INDUS «TRIAL CO. , LTD., Osaka, Japan

Electric vacuum cleaner

The invention relates to an electrical Vacuum cleaner and in particular an electric vacuum cleaner having a body that has an electric fan and includes a dust collector removably mounted in the housing.

In conventional electric vacuum cleaners of the type in which an electric fan that consists of a fan rotor and consists of a motor for! rubbing the eotor.s, dust together with air into a body sucks in through a suction opening and the dust is caught and collected in a dust bag, the one in the body between the. Suction opening and the electric Fan is arranged, there are disadvantages in that than when the dust bag, which deals with the other

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collected jams fell from the body of the vacuum cleaner taken out by opening a front end cover and the dust is emptied from the bag, the Hands inevitably become soiled with dust and in addition, since the dust bag is generally made of a cloth material is made that all kinds of dust with can hold large and small dimensions, the bag usually within a short period of use duroh fine dust is clogged, resulting in a waste in the suction power of the vacuum cleaner leads, so that the bag must be removed and cleaned often.

To the above mentioned earlier clogging of the usual To avoid bag filters, a vacuum cleaner was used invented the air, including the dust, first is passed through a pre-filter with coarse mesh, so that dust of larger dimensions through this pre-filter can be intercepted and collected, while the fine particle dust that duroh the pre-filter has passed through a Naoh filter is intercepted and collected with fine meshes. In this case, the dust collected by the Haohfilter becomes removed from this and due to a deformation of the post-filter, caused by a dust removal device, dropped onto the pre-filter. By the vacuum cleaner of this type, however, the peat filter, the post-filter and the dust removal device are all independent placed on a body of the vacuum cleaner, and therefore, if the dust is to be removed, the vacuum cleaner must be carried as a whole to a waste container, and there the pre- and Naohfliter must be separated from the body

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can be removed with the vacuum cleaner. One of those Torgang is very tedious, and the disadvantage that the Hands, by dirtying the dust during the emptying process, is still not eliminated. Since that Naohfilter is made of a fabric material, must In addition, the dust detachment device has a direct deformation of all portions of the filter, and therefore the dust removing device must be large in size to have. In addition, there is still the disadvantage that the Naohfilter, which is made from cloth material is clogged in a very short time.

It is therefore the main object of this invention to remedy the disadvantages of the conventional electric vacuum cleaner Eliminate the fact that the hands are harmful by dirtying the dust when it comes out of the vacuum cleaner is cleared, and that the tedious removal and reinsertion of the separate pre-filter and Naohfilter are required every time the accumulated dust is evacuated, and an improved electrical one To create vacuum cleaner that allows hygienic and easy emptying of the accumulated dust.

The main object of this invention mentioned above is used in an electric vacuum cleaner with one body that has an electric fan and one in the body contains removably arranged dust collector and a suction opening at its front end and has an open rear end for removing the dust, achieved by a dust removal unit, which is removably located at the rear end of the dust collector and includes an arrangement of a

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filter with coarse mesh to collect large dust particles, a main filter with fine mesh to catch the fine dust that passes through the pre-filter is, and a dust separator device that causes the main filter to vibrate to shake off the dust therefrom.

k A further aim of the invention is to

to create the improved design of the filter unit includes a pre-filter, a main filter and a device for shaking off the dust from the main filter, so that coarse and fine dust are caught and collected separately; On the one hand, a high dust collection performance and on the other hand the collected dust can easily be emptied without dismantling the unit must become.

Yet another object of this invention is to provide the above unit with a very simple and lightweight construction to manufacture *

Another object of this invention is to provide an improved construction of the main filter, that can easily be freed from the dust it collects and is less prone to clogging.

It is yet another object of this invention to provide an improved dust collection container which is provided with a secondary air duct, which considerably extends the operating time between evacuations

0 0 9 8 2 0/131 B.

Further objects and gate parts of the invention will become apparent from the following description of an embodiment in connection with the drawing · Show Barin »

Fig. 1 is a side view of an embodiment of the electric vacuum cleaner according to the invention, with essential ropes in axial section are shown; '

Figo 2 is a perspective view of the body of the vacuum cleaner shown in Fig * 1 / wherein the dust collection container and the associated dust removal harvesting units have been removed;

3 is a perspective view of the dust collecting container, in which the dust removal unit is inserted;

FIG. 4 is an enlarged perspective view of FIG Dust removal unit;

5a to 5d are perspective views of various ropes that form the dust removal unit, FIG. 5a showing a housing and the gate filter attached to it, FIG. 5b the main filter, FIG. 5 o a perforated end plate and FIG. 5d showing a slide;

Fig. 6 is an enlarged perspective view of the main filter j

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Fig.? a further enlarged perspective view of a device for pivotable mounting of the pre-filter on the housing}.

FIG _e 8 is an enlarged perspective view of the dust removing unit in a state when the Torfilter is swung;

9 is a perspective view of a filter element of the main filter;

FIG. 10 shows a cross section through a cable of the filter element shown in FIG. 9 and FIG

11 is a graph showing the performances of two vacuum cleaners of different designs.

Sex * electric vacuum cleaner shown in the drawing consists of a body 2 which carries an electric ί blower 1 with an air outlet (not shown) at its rear end and a dust collector 6 contains, which has an IUfteinlaßloch 3 at its front End and an open rear end 4, where one Dust removal unit 5 is arranged »The dust collection container 6 is provided with a handle 7 by which it can be carried to easily get out of a trough-shaped Aofnahmeabsohnitt 8 (Figo 2), which is attached to a front lower rope of the body is provided, taken out or can be used in these · If the dust container 6 arranged in the receiving section 8 "

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becomes one at the rear of the bottom of the container provided approach 10 in one in the bottom of the receiving section provided corresponding opening inserted, and a slide latch 9 is with a front end of a Handle 11 on the body 2 pushed into engagement ".

The dust removal unit 5 consists of a Main filter 13 made of an angled folded elastic Fine mesh sheet made of a substantially cylindrical housing 14 which houses the main filter, from a prefilter 16 made of a net with coarse mesh, which is stretched by a frame 15, which is attached to a front End of the housing is pivotally mounted, made up of a perforated end plate 17 »which is about a rear end of the housing is attached, and from a slide 18 which is slidable on the perforated end plate is appropriate. The housing H and the perforated end plate 17 are detachable in annular grooves 19a and 19b a sealing frame 19 made of elastic material is used, which holds the main filter 13 along its circumference, whereby the Yorfilter 16, the main filter 13 and the slide 18 are combined to form the dust removal unit will. The annular grooves 19a and 19b are provided along the front and rear sides of a flange section, which extends from a middle section of the frame 19 extends inward, and this flange section ends in a pair of serrated sections for supporting the folded sheet of the main filter, as will be more fully explained later is described. The sealing frame 19 is also with spaced apart annular ribs 19o and 19d equipped on its outer periphery · This

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Hips ensure the air insulation on the circumference of the dust removal unit, if it is arranged at the rear end of the dust collector.

The perforated end plate 17 has a central concave portion 17a (from the rear end of the dust removing unit from the point of view of

fc is equipped with a straightened opening 20 that extends horizontally or at right angles to the vertically arranged pleats of the main filter, and with a plurality of openings 21, which are arranged in the upper and lower areas of the elongated opening are. The top of the middle concave section 17a is against an upper circumferential portion of the plate 17 offset to an opening and a gripping portion 22 on which the dust removal unit 5 is carried can be removed from or attached to the rear end of the dust collector 6 to become. The slider 18 has a button 23 and a Variety of approaches 24. The slider is on

w elongated opening 20 of the perforated end plate 17 is arranged such that it is displaceable by means of the button 23, which has been guided through an opening 25 at an end section of the elongated opening 20. The lugs 24 can run past the rear edges of angled folds 12 of the main filter 13 and snap into place at the edges to cause deformation and vibration of the main filter when the slide 18 back and forth along the elongated opening 20 by grasping the button 23 with your fingers is moved about, causing fine dust, which comes from the main

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filter has been caught, shaken off by this and dropped onto the bottom of the housing 14. There the lugs 24 are provided in a plurality, imparting the aforementioned reciprocating movement of the slide 18 the folds 12 a number of successive son appendages in a direction perpendicular to them, causing strong vibration and deformation of the filter. So that on the filter 13 such vibration and deformation can be caused which causes the accumulated dust to be shaken off, the filter must be elastic »

The main filter 13 or the sheet of the filter element is made as follows »threads, such as. B, Nylon threads are cut to a length of 10 - 15 cm, and these threads are arranged by being threaded through them so that they are knitted together Latex or other elastic material in liquid form, such as. B. rubber or synthetic resin, on the sheet of each other knitted threads are sprayed on, which is then vulcanized in a heated and under pressure condition is so that the threads are covered with thin Solhiohten made of the elastic material and elastic through this Materials are also bonded together, whereby an elastic sheet 15a with fine meshes is obtained. Then on one surface of the sheet by means of an adhesive, a burled fabric 13b with relative coarse mesh of about 20 mesh (international standard) glued on so that a filter element of about 10 mesh is obtained. This leaf-shaped element then becomes angled and alternately in heated and pressurized

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in the final state folded to a number of folds 12 to manufacture. The folded element will then be between the upper and lower serrated sections 26 of the see

arranged processing frame 19, which is made of elastic material, such as _e rubber or polyvinyl chloride, and glued to it to form the main filter assembly shown in Figure 5b. With this construction, in which the main filter 13 is an alternately folded element, the advantages are achieved that a relatively large filter area is available in a limited space in the housing 14, that a vacuum chamber 27 for fine dust in that occupied by the main filter Space is created without an additional axial length being required for such a collector and that strong vibration and deformation of the filter element are possible in order to achieve better dust absorption performance through the son-lapping effect. Me angularly folded edges of the main filter 13, which are subjected to the son appealing effect by the Sohieber 18, are provided with reinforcing layers 28 (Fig. 10), for example made of synthetic resin, which is brought up by verse trezieh. These layers prevent the threads from loosening at the edge offsets as a result of the SoSmapp effect.

In Fig. 7 is the construction of the pivotable Attachment of the frame 15 of the prefilter 16 to. the housing 14 is shown. As can be seen there is a upper front end absoimitt of the housing is provided with a cutout 37, and on both sides thereof a pair of üagernuten 29 are provided which are formed in a pair of ribs 40 at the upper front end portion <Γ The ribs also each have an angular ledge

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34, which extends somewhat downwards, and a spring plate 32 _f, which is normally curved so that it is somewhat convex near the top, is carried by the angled projections 34. On the other hand, the frame 15 of the prefilter 16 is provided with a connector at its upper portion which has a pair of pins 31 extending from its opposite ends and engaging with the bearing grooves 29, a lifting lever 30 and a cam 33 with a horizontal cam surface 33a . When the pair of pins 31 have been inserted into the hats 29 by briefly pressing the spring plate 32 down strongly in order to guide the cam surface 33a over the spring plate, the pins 31 with the grooves 29 are guided by the cam 33, which is formed by the normally convex spring plate 32 is pushed upward, held in pivoting engagement, which also causes the gate filter 16 to be pushed normally resiliently into its closed position, in which it rests on the front end of the housing 14 by the leverage of the cam 33 · In this construction, the pivot bearing can the prefilter 16 can be pivoted open slightly, as shown in FIG . When the force applied by the finger to the lifting lever 30 is released, the prefilter 16 is naturally closed automatically by its own weight and also by the resilient force that is applied to the curve 33 by the spring plate 32. The frame 15 is provided with an opening which is

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shaped rib 39 is bordered with a trough-shaped Side channel 38 of the dust collection container cooperates, as described below.

As can be seen in Figo 1, the dust collection container 6 is provided with the secondary channel 33, which through an additional filter 35 is limited, which consists of a network with the same size as the prefilter 16 is made and of a grid element 36 will be carried. The secondary channel 38 extends from the front End of the dust collector with a gradually increasing cross-section up to a point where the pre-filter 16 is arranged, and there is the channel with a space above the housing 14 through the opening in connection, which is limited by the rib 39. This With the dust collection chamber 27, space stands for fine Dust over the cutout 37 in connection. Through the Arrangement of the lifting duct 38 ensures an air duct, which extends from the air inlet opening 3 to the main filter 13 if the dust collector is completely filled with coarse dust or the mesh of the additional filter are completely clogged. When the amount of dust accumulated in the dust collector 6 is not large, the air sucked in from the air inlet port 3 mainly enters through the pre-filter 16 the main filter 13, but when the dust accumulated in the container 6 and therefore the flow resistance through As the dust increases, the air is guided more through the secondary duct 38 to a substantially constant one Maintain airflow »

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When the dust removal unit 5 at the open rear End of the dust collection container 6 is arranged, "touches the rib 39 exactly the rear hand of the trough-shaped lifting channel, and the upper surface of the hip 40 lies exactly on the inner wall of the dust collector container 6 to to form a chamber that is a continuation of the lifting channel and with the front area of the main filter 13 Is connected via the cutout 37. The axial position of the dust removal unit 5 in relation to the dust collection container 6 is by a variety of Stops 41 determined on the upper and lower sections the inner wall of the container 6 are arranged * and against which the sighting frame 19 of the dust removal unit bumps.

The body 2 of the vacuum cleaner is supported by front and rear wheels 42 and 43 to be easily transported to be able to. One end of a suction tube can be inserted through a suction hole 44 » At the inlet 3 is a check valve 45 provided that opens when the end of the suction hose is inserted and closes automatically, when the hose is removed. The arrangement of the Check valve prevents the dust collected in the dust collector 6 from being poured out, when the container or vacuum cleaner is being transported.

Now the work trip and the use of the electric vacuum cleaner according to the invention will be explained When the electric bubble 1 is turned on, will air including dust through the suction hole

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and the suction tube attached to the air inlet opening 3 is sucked into the dust collector 6 »Aas dem all; the air sucked in becomes coarse dust through the gate

filter 16 trapped, and fine dust carried by the Pre-filter has passed through, is captured by the main filter 13, so that only clean air through the openings 21 of the end plate 17 to the electric fan T and then discharged from the air outlet port will. In the dust collecting container 6, coarse and fine dust particles are thus gradually in front of the peat filter 16 or deposited in front of the main filter 13. When the shift the coarse dust thicker and therefore the air resistance as it gets bigger, the air gets increasingly through diverted the secondary channel 38. Therefore, the vacuum cleaner can be operated effectively until the dust collection container is completely filled with the accumulated dust.

The ones collected in this way by the vacuum cleaner Coarse and fine amounts of dust are based on the following Wise cleared ι First the slide latch 9 is unlocked and the dust collector 6 from the Aufnahmsabsohnitt δ of the vacuum cleaner body taken out by grasping the handle 7 with the hand. Ban will the hand-carried dust collector into one Waste container transported where the dust removal unit 5 from the open rear end 4 of the dust collector is taken out by holding it on the gripping portion 22 between the fingers, and the coarse dust collected in the dust collector comes from the wide open rear end of the container cleared out. Then the slide 18 is moved back and forth, "

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holding the button 23 between the fingers, so that the main filter 13 gives vibration and deformation and the fine trapped on its surface Dust is shaken off and on the bottom of the dust collection chamber 27 for the fine dust falls. Danaoh, the lift lever 30 is moved by a finger to move the Swivel up the prefilter 16, as shown in FIG. 8 and the fine dust collected in the chamber 27 is taken out of the open front end of the housing 14. The back and forth movement of the slide 18 can take place "before the dust removal unit 5 of the dust collector 6 is released. After the fine dust has been removed from the dust collection chamber 27, the Sohubhub is released, causing it to automatically the front end of the housing 14 through the pre-filter 16 locks. The dust removal unit 5 is now again at the open rear end of the dust collecting container 6 attached. The assembled with the dust removing unit The dust collector is then carried back to the vacuum cleaner body and into its receiving section 8 reinstalled.

It is known that the dust in a common household is, to the largest rope, about 85 ° by volume, fibrous dust. Therefore, in the electric vacuum cleaner according to the invention, the dust collecting container 6 will usually be filled with coarse dust, although the main filter 13 is hardly clogged with fine dust. In this case, it is only necessary to detach the dust removing unit 5 from the open end of the dust collecting container 6 and to empty out the coarse dust collected therein.

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Since it is only necessary to have the relatively light dust collection container and the one mounted in it To carry the dust removal unit on the handle 7, very little work is required. There is none while the dust collector is being transported There is a risk of the dust spilling out of the container as the inlet opening 3 passes through the check valve 45 is locked.

The dust collected in the dust collecting container 6 can be removed from it by taking it out the dust removal unit 5 by holding it between your fingers and pivoting the container 6 is while the fine dust collected in the dust collecting chamber 27 can also be easily removed, duroh Pushing the thrust lever 30 with one finger of the hand, carrying the dust removal unit 5 to thereby achieve the Swing up the prefilter 16 and tilt the dust removal unit. Therefore, it is completely avoided that Hands in the process of emptying the dust in direct Come into contact with the dust, and therefore the work can be carried out very cleanly.

In addition to the ease of emptying the dust, you can run that with the through the additional filter 35 is equipped with a limited secondary duct 38, the period in which the vacuum cleaner can be used effectively without the collected dust must be emptied, in comparison to a conventional one Vacuum cleaner without this secondary channel can be extended significantly, as shown in Figo 11, where the

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Curve a shows the performance of a vacuum cleaner without a side duct and the curve "b the performance of the vacuum cleaner with the Shows secondary channel according to the invention. As already explained, the guide channel is through the pre-filter 16 gradually blocked when the dust as a layer deposited on the pre-filter, and the flow resistance is increased accordingly. The secondary channel 38 »of the in but arranged in the axial direction of the cylindrical dust collector substantially its entire length and is open to the inside of the container not blocked before the dust collector; he completely is full of dust. Therefore, a decrease in an air flow through the pre-filter 16 due to pre- * increased deposition of dust compensated for by a correspondingly increased air flow through the lifting duct 38. Thus, the airflow falls off relatively slowly, like it shows the curve b in Figo 11 and it is avoided that the air flow drops sharply, as shown by curve a in Fig. 11 shows. Since the secondary channel 38 and the additional Filter 35 along the top of the dust collector 6 are arranged, there is less risk that the additional filter will be clogged with dust, and the secondary channel is expediently arranged without significantly increasing the volume of the vacuum cleaner.

The main filter 13 in the form of an alternate corrugated elastic sheet offers great elasticity and receives good vibration as a whole around the to shake off settled dust by a snap action applied to an edge part. Since the slide 18 to apply the son app effect

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the main filter * having a plurality of approaches, the reciprocating movement of the slider with a small stroke and at a low speed can cause a high frequency vibration to the entire filter. The main filter 13 or the filter element shown in Fig. 9 is produced by a pressing process under heat and pressure and is arranged between the toothed portions 26 of the sealing frame 19, which is also produced by a pressing or injection molding process from rubber * polyvinyl chloride, etc., to create the main filter assembly. Therefore, the manufacturing cost of the main filter assembly according to the invention is much lower than that of conventional bag filters. By supporting the main filter 13 by means of the sealing frame 19 made of elastic material, the vibration properties of the main filter are further improved. Since the main filter 13 is provided with the reinforcing layer 28 at the rear edge portions of the folds, it is further avoided that the threads forming the filter are loosened by the snap action of the slide during a long operating time _e

Since the main filter 13 consists of two layers, namely the sheet 13a made of pierced threads that are glued with elastic material, and the burled fabric 15b, the collection of fine dust is carried out three-dimensionally. Because the loops formed by the pierced threads are deformed by an applied shock "in the mesh trapped fine dust is effectively repelled by the _c ter Hauptfil- impacts or vibration are applied. The

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Combination of these layers 13a and 13b is effective for the production of a filter element that required dust collection capability and flow resistance. If a filter material is to be formed only duroh the layer of pierced threads, such as. B. by the layer 13a, it is surely possible to obtain an element which has a certain dust collecting ability and a flow resistance. In this However, it is relatively difficult to obtain a high dust collection capability with a low flow resistance in comparison to the fabric material. It is safer it is preferable to combine the layer 13a with the relatively low flow resistance with the layer 13b, to balance the dust collecting ability and thereby a balanced flow resistance and a dust collecting ability to achieve.

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Claims (1)

Pat β η tans pr ii ehe ι π.) Electric vacuum cleaner with a body, the one electric fan and one removable in the body arranged dust collector contains and a suction opening at its front end and an open one s has the rear end for removing the dust, characterized by a dust removal unit (5), the removable at the rear end (4) of the dust collector (6) is arranged and includes an arrangement of a peat filter (16) with coarse mesh to catch large dust particles, a main filter (13) fine mesh to catch the fine dust that has passed through the peat filter and a dust collector oil device (18), which vibrates the main filter (13) to shake off the dust from it evokes. 2o vacuum cleaner according to claim!, Characterized in that, that the main filter (13) is a deviating is a folded sheet of filter material having a number of slits (12) arranged in parallel, and is received in a substantially cylindrical housing (14) of the dust removal unit (5), that the gate filter (16) is arranged at a front end of the housing (14) to detachably a front opening of the housing to cover that the Staubaböohuttelvorrichtung is a slide (18) which is arranged on the housing so that it is substantially at right angles to the folds (12) is displaceable, and that the slide (18) on its front side a There are a large number of attachments (24) in the trailing edges of the 009820/1310 fold (12) into place, and a button (25) on its
Has reverse side. 3. Vacuum cleaner according to claim 2, characterized in that the main filter (15) with a reinforcement sohicht (28) on the rear card sections of the folds (12) "is provided, which can be locked by the slider (18) are subject. . , ■ 4-0 vacuum cleaner according to claim 2, characterized in that the Yorfilter (.16) at the front end dea
Housing (14) is pivotably mounted in such a way that it can be pivoted open by a pushing action of a finger. 5. Vacuum cleaner according to claim Z _9, characterized in that the main filter (13) from the alternately folded sheet of a filter material through a
Viewing frame (19) is held, which is provided with toothed portions (26) which can close the axial ends of the folds (12). , 6 · Vacuum cleaner according to claim 5 »characterized in that the housing (H) has a flange section
along its rear circumference that the. Slide (18) is arranged on a perforated plate (17) which forms a rear bath cover of the housing (H)
forms that the flange section of the housing and the
perforated plate (17) arranged in grooves (19a, 19b) in the sealing frame (19), so as to. to be attached to the dust removal unit (5), and -22- 00982Q / 1316 that the Mchtungsrahmen (19) is made of elastic material and has annular ribs (19o _f 19d) on its one circumferential section for an airtight fastening of the StaulD@ntfernungseinh.eit (5) to the dust collector (6). 7 · Vacuum cleaner according to claim 1 ₉ thereby marked- ^. indicates that the main filter (13) is composed of a sheet (13a) of base material of a number of τοη threads knitted and connected to each other by an elastic means, and of a cloth material (13b) which is attached to a front side of the sheet is. 8. Vacuum cleaner naoh Anspruoh 1, characterized in that the dust collection container (6) is provided with a quake channel (38) which connects a region.zwisohen the inlet opening (3) and the pre-filter (16) with an inlet area of the main filter (13) , and that the Uebenkanal (38) by a'trög-shaped to <~ W sätzliehes Piltsr (35) is formed of coarse mesh. 9. Vacuum cleaner naoh claim 1, characterized in that that the dust collector (6) has a handle (7) - to ask « 10 «Vacuum cleaner according to claim 1, characterized in that the inlet opening (3) has a check valve (45) is provided to prevent spillage of the in the Prevent dust collection container (6) from containing dust. BAt> OFlIGtNAL 009820713! S.