EP1360921B1 - Fine filter situated in exhaust air stream of vacuum cleaner, and corresponding vacuum cleaner - Google Patents

Abstract

The vacuum cleaner (1) draws air from floor coverings through a filter (3) and returns the air to the room through a second fine filter unit (7) at the outlet side of the fan motor (6) through a grille (9). The fine filter consists of folded paper within a plastics case.

Description

The invention relates firstly to a device provided for the arrangement in the exhaust air flow of a vacuum cleaner superfine filter according to the features of the preamble of claim 1.

Such, to be arranged in the exhaust air flow of a vacuum cleaner are known. These are used to filter smallest, still present in the exhaust air flow dust particles, and further example. The filtering of carbon particles of the upstream suction fan. Since the recorded in the plastic housing of the ultrafine filter paper is added over time with particles, it is also known to interchangeable absorb the particulate filter in the vacuum cleaner. In order to ensure a sealing connection of the ultrafine filter to the blow-out channel, the filter-plastic housing is provided with a soft-plastic sealing lip corresponding to the blow-out channel edge.

A micro-filter with such a soft plastic sealing lip is, for example, from the DE 43 22 222 A1 known. Next is the state of the art on the JP 09 047407 A and the JP 01 230329 A to refer. From this it is known to provide control cams on such a very fine filter.

Based on the cited prior art, the invention is concerned with the task of specifying an advantageous micro-filter for a vacuum cleaner.

This task is problematic is solved first and foremost by the subject matter of claim 1, wherein it is pointed out that the sealing lip a freestanding height corresponding to one fifth to one twentieth of the narrow side dimension of the rectangular cross section that at an outlet edge edge in the outlet direction over the peripheral edge projecting control sections are provided and that the control sections are formed at the two longitudinal edge edges, wherein at a longitudinal edge edge associated with a Corner, a short cam is formed and diametrically opposite a long-cam. According to this embodiment, an improved sealing contact of the ultrafine filter is ensured at the associated end portion of the Ausblaskanales. Manufacturing tolerances are thereby easily absorbed. Thus, for example, has the sealing lip at a narrow side length of the rectangular cross section of 70 mm to a free-standing height of 7 mm. The control sections form an input or execution aid for the micro-filter. They can be used to relocate the particulate filter to or from its operating position. About the short cam the Feinstfilter can be moved in the course of insertion into the vacuum cleaner recording in its operating position, ie in the sealing position. The diametrically opposed long-cam can here serve the return control of the ultrafine filter from the operating position when pulling out of the vacuum cleaner recording.

It proves to be particularly advantageous here that the soft-plastic sealing lip is directly formed on the plastic housing in the two-component injection molding process. Furthermore, the fine filter for better handling in the course of replacing the same on the plastic housing on an integrally molded grip tab. The latter is in particular in the transverse direction in itself rigid, but flexible, in particular hinged to the plastic housing integrally connected. In this regard, it is further proposed that the grip tab associated with the outlet edge is formed, which is opposite to the provided with the sealing lip inlet edge. The connection the gripping tab on the plastic housing can, for example, via a film hinge or the like. The length of the grip tab preferably corresponds approximately to the distance between the outlet edge and the inlet edge of the plastic housing.

The Langsteuernocken can also have a dual function, for which it forms a subordinate overlapping to the housing side surface rail, the same when inserting the Feinstfilters in the vacuum cleaner recording a linear guide thereof to a example. Pivoting the Feinstfilters on the Kurzsteuernocken in the sealing operating position causes. In order to counteract tilting during insertion or removal of the ultrafine filter, it is further provided that on the opposite side of the housing, associated with the sealing lip, a further rail is formed. Preferably, the control sections, i. H. both the short-circuit cam and the rails or the long-stroke cam material integrally formed on the plastic housing.

The invention further relates to a vacuum cleaner according to the features of the preamble of claim 6 with an electric motor having a suction side and a blast side, wherein on the blast side a receiving chamber for a superfine filter with a cassette-like plastic housing rectangular plan is provided, which superfine on two opposite Flat sides has a lattice-like structure, wherein folded filter paper is received in the interior of the plastic housing and at one surrounding a lattice-like structure edge of a soft plastic sealing lip, with recordings for rail sections of the ultrafine filter, extending in the insertion direction of the ultrafine filter in the receiving chamber are formed , To a full-surface, sealing system of Feinstfilter sealing lip on the corresponding edge of the Ausblasluftkanals ensure, it is proposed according to the invention that the rail receptacles are opened in an end portion to the outlet side of the engine. This allows a transverse to the insertion direction transverse displacement of the ultrafine filter in the direction of the outlet side of the engine, which can be urged by suitable structural measures on the vacuum cleaner side intake and / or on the micro-filter latter in the sealing system position. For example, it is provided that a rail receptacle runs curved in sections. In order to avoid injury to the soft lip when inserting or inserting the ultrafine filter, it is further provided that on the last fifth of the insertion path control of the filter takes place on the outlet side of the engine, under elastic deformation of the, the outlet side of the engine associated sealing lip of the ultra-fine filter. Accordingly, the soft seal lip of the ultrafine filter is not linearly guided along the outlet side edge of the associated Ausblaskanales by the recording embodiment of the invention. Rather, when inserting the ultrafine filter initially a rail-guided linear displacement, in which the sealing lip is displaced at least over most of the insertion path with distance to the exhaust duct end face and only in a final fifth of the insertion path by a to the insertion about transverse displacement to the corresponding Face is set. Preferably, a superimposition of the last fifth of the substantially linear insertion path and the transverse displacement in the direction of the exhaust duct end face is provided. The transverse displacement is preferred by appropriate structural measures on the filter holder and / or achieved at the finest filter. Thus, a Aussteuerschräge is preferably provided in the field of filter recording, which cooperates with a control cam of the ultrafine filter. This Aussteuervorrichtung can also be used to press the micro-filter or its sealing lip in the sealing position by utilizing the elastic properties of the soft lip. In a further development of the subject invention, in which the receiving chamber is closed by a discharge grille and projections are formed on the chamber side projections, it is provided that the projections are control projections which bias in the rear grip to the superfine these in contact with the blast side of the engine. Finally, it is proposed that the outlet grille has a viewing opening in which the visible side of a gripping bottle formed on the superfine filter is exposed when the ultra-fine filter is inserted. Thus, even when the vacuum cleaner is ready for operation, the user is given a visual check as to whether a superfine filter has been used. Furthermore, on the visible side of the micro-filter grip tab, information about the type and optionally about the change interval of the micro-filter can be applied, which information can be seen at the same time through the viewing opening of the outlet grille.

Fig. 1

einen erfindungsgemäßen Staubsauger in perspektivischer Darstellung;

Fig. 2

eine Ansicht auf eine, durch ein Ausblasgitter verschlossene, einen Feinstfilter aufnehmende Aufnahmekammer des Staubsaugers;

Fig. 3

eine der Fig. 2 entsprechende Ansichtsdarstellung, jedoch nach Entfernen des Ausblasgitters;

Fig. 4

eine explosionsperspektivische Seitenansicht zu Fig. 3;

Fig. 5

eine Vergrößerung zu der Draufsichtdarstellung in Fig. 3, jedoch bei entferntem Feinstfilter;

Fig. 6

den erfindungsgemäßen Feinstfilter in einer perspektivischen Einzeldarstellung;

Fig. 7

den Schnitt gemäß der Linie VII-VII in Fig. 6;

Fig. 8

den Schnitt gemäß der Linie VIII-VIII in Fig. 3, eine Zwischenstellung einer Einschubbewegung des Feinstfilters in die Aufnahme betreffend;

Fig. 9

den Schnitt gemäß der Linie IX-IX in Fig. 8;

Fig. 10

eine Folgedarstellung zu Fig. 8;

Fig. 11

eine weitere der Fig. 8 entsprechende Darstellung, jedoch die endgültige Einschubstellung des Feinstfilters betreffend, bei Abdeckung der Aufnahme durch das Ausblasgitter.

The invention with reference to the accompanying drawings, which illustrate only one embodiment, explained in more detail. It shows:

Fig. 1

a vacuum cleaner according to the invention in a perspective view;

Fig. 2

a view of a, closed by a discharge grille, a micro-filter receiving receiving chamber of the vacuum cleaner;

Fig. 3

one of the Fig. 2 corresponding view representation, but after removal of the outlet grille;

Fig. 4

an explosive perspective side view too Fig. 3 ;

Fig. 5

an enlargement to the plan view in Fig. 3 , but with the fine filter removed;

Fig. 6

the micro-filter according to the invention in a perspective individual representation;

Fig. 7

the section according to the line VII-VII in Fig. 6 ;

Fig. 8

the section according to the line VIII-VIII in Fig. 3 , an intermediate position of an insertion movement of the ultrafine filter in the recording regarding;

Fig. 9

the section according to the line IX-IX in Fig. 8 ;

Fig. 10

a follow-up presentation to Fig. 8 ;

Fig. 11

another one Fig. 8 corresponding representation, however, concerning the final insertion position of the ultrafine filter, when covering the recording by the exhaust grille.

Illustrated and described first with reference to Fig. 1 a vacuum cleaner 1 in the form of a hand-held vacuum cleaner with a base housing 2, a swivel-mounted on this, a non-illustrated filter bag receiving filter chamber 3, and a device handle 4 and a suction attachment. 5

An equally not shown, arranged in the base housing 2 suction / electric motor 6 has a blast side B and a suction side S, wherein the suction side S of the filter chamber 3 faces. The blast side B, however, faces the environment with the interposition of a superfine filter 7.

The aforementioned superfine filter 7 is held in a, the blast side B of the electric motor 6 associated receiving chamber 8, said receiving chamber 8 is closed by a snap-on outlet grille 9. The latter is inside, d. H. facing the receiving chamber 8, provided with a, the blow-grid openings covering fleece 10.

As from the individual presentation in Fig. 6 to recognize the fine filter 7 has a cassette-like plastic housing 11 with a rectangular plan. The two opposite flat sides are each provided with a grid-like structure 12, which allows the flow through the plastic housing 11.

Inside the plastic housing 11, a zig-zag folded filter paper 13 is received, wherein the folded edges of the filter paper 13 are aligned facing the lattice-like structures 12.

At the, a grid-like structure 12 surrounding inlet peripheral edge 14 is formed a circumferential soft plastic sealing lip whose free-standing height h corresponds to about one-tenth of the narrow side dimension a of the rectangular cross-section of the plastic housing 11. In the illustrated embodiment, the sealing lip height h is about 7 mm, with an approximately semicircular sealing lip cross-section is selected.

Associated with an upper narrow side of the plastic housing 11, a gripping tab 16 is integrally formed on the latter. This grip tab 16 is rigid in the transverse direction, but so flexibly connected to the plastic housing 11 in one piece, that the grip tab 16 can be pivoted into a resting on the upper narrow side position. The connection of the grip tab 16 takes place in the region of the sealing lip 15 opposite outlet edge 17 by forming a film hinge.

At the outlet edge 17 two on the peripheral edge 17 in the outlet direction projecting control portions 18 at the two longitudinal edge edges 19, 20 are formed, wherein at the longitudinal edge 19, associated with an upper, the handle tab 16 facing corner 21, a short cam 22 and diametrically opposite the longitudinal edge 20 is a long cam 23 is provided.

The short-control cam 22 has a laterally considered triangular plan view, for the formation of a downwardly pointing and in the longitudinal edge edge 19 expiring control slope 24th

The diametrically opposite longitudinal control cam 23, however, forms in overlapping to the facing housing side surface extending in the direction of the longitudinal edge edge rail 20 25. On the, this rail 25 opposite side of the housing another, laterally projecting and spaced from the inlet edge 14 edge rail 26 is formed which, parallel to the associated longitudinal edge, at a distance from the upper, the grip tab 16 having narrow side of the plastic housing 11 ends ,

As already mentioned, a receiving chamber 8 for the superfine filter 7 is provided on the blast side B in the base housing 2. The insertion of the Feinstfilters 7 in the receiving chamber 8 by inserting, for which the receiving chamber 8 has two opposite rail receptacles 27. The clear distance between the rail receptacles 27 corresponds approximately to the narrow side dimension a of the ultrafine filter 7. Preferably, the clear distance is slightly larger than the dimension a selected.

The rail receivers 27 are further arranged offset in relation to one another in the blowing direction, corresponding to the staggered arrangement of the rails 25 and 26 of the ultra-fine filter 7.

The fine-filter rail 26 assignable rail receptacle 28 is formed by an opening of protruding into the receiving chamber 8 edge portion 29. This rail receptacle 28 is left in the course of inserting the ultrafine filter 7 in the receiving chamber 8 in the last fifth of the insertion path of the filter-side rail 26, so that the ultrafine filter 7 in this last fifth of the insertion path and transverse to the linear, through the rails Recording 28 predetermined insertion direction is movable.

The opposite, with the filter rail 25 cooperating rail mount 27 extends substantially over the entire insertion depth along the receiving chamber inner wall and is partially formed in cross-section U-shaped. Furthermore, this rail receptacle 27 is formed so that it opens in an -in the insertion direction considered-end section to the outlet side B of the electric motor 6 out, including a the Ausblasseite B facing guide web 30 of the rail receptacle 27 in this end portion in the direction the outlet side B runs out curved. This curved, open end portion of the guide web 30 is provided in the illustrations with the reference numeral 31.

When inserting the ultrafine filter 7 in the receiving chamber 8 of the micro-filter 7 is initially guided by means of its rails 25, 26 in the rail receptacles 27, 28 in the insertion direction. In the course of this initially linear insertion movement, the filter-side sealing lip 15 is guided by a distance past a circumferential abutment end face 32 of a blast-side air channel (see FIG. Fig. 8 ). In the region of the last fifth of the insertion path of the filter side arranged short cam 22 occurs with its control slope 24 against a arranged in the receiving chamber opening area counter-control surface 33, which causes the superposition of the linear insertion movement by a forward displacement of the ultrafine filter 7 in the direction of the blast side B of the electric motor 6 out , This transverse displacement of the ultrafine filter 7 is made possible by the opening of the rail receptacle 27 in the region of the curved end section 31 of the guide web 30.

As a result of this control of the ultrafine filter 7 toward the abutment end face 32 of the blow-out side B, the sealing lip 15 molded onto the plastic housing 11 of the ultra-fine filter 7 is pressed against the abutment end face 32 in a material-friendly manner with elastic deformation. As from the illustration in Fig. 10 can be seen, the sealing lip 15 is in the completed insertion position of the ultrafine filter 7 only in a lower region of the abutment end face 32 of the Ausblasseite B, this due to the fact that the ultrafine filter 7 and the contact surface 32 corresponding sealing surface of the Sealing lip 15 extends inclined to the abutment end face 32.

The desired sealing bias of the sealing lip 15 against the abutment end face 32 is achieved only after closing the receiving chamber 8 through the outlet grille 9. The latter has chamber-side control projections 34, which in the course of placement of the Ausblasgitters 9 by means of control slopes 35 by acting on the upper outlet narrow edge edge of the plastic housing 11, a further control of the ultrafine filter 7 in the direction of the Ausblasseite B effect. In the closed position of the receiving chamber 8 according to Fig. 11 The control projections 34 engage behind the very fine filter 7 such that it is biased into abutment with the blast side B of the electric motor 6.

The removal of the ultrafine filter 7 is carried out after removal of the outlet grille 9 by pulling on the filter-side gripping tab 16. Here, first, by exerting pressure on the curved end portion 31 of the rail-receiving side guide web 30 through the long cam 23 of the ultrafine filter 7, a removal thereof from the plant end face 32 of the blast side B to the rail-guided position to the rectilinear extract of the ultrafine filter. 7

In order to give an insertion control and thus also information about the actually inserted ultrafine filter 7, the outlet grille 9 has a viewing opening 36 in which the visible side of the filter-side grip tab 16 is exposed when the ultrafine filter 7 is inserted (see FIG. Fig. 11 ). This outwardly visible to the user side of the grip tab 16 may also carry information about the inserted Feinstfilter 7.

In addition, the viewing opening 36 also serves as a handle opening for removing the outlet grille 9, in which case the flexible connection of the grip tab 16 on the plastic housing 11 is advantageous, since this in an intervention in the handle / viewing port 36 down in the direction of the plastic housing 11th can dodge.

Claims (10)

1. Extra-fine filter (7), provided for arrangement in the exhaust airstream of a vacuum cleaner (1), in particular a household vacuum cleaner, and comprising a cartridge-like plastics material housing (11) which is rectangular in plan view and has a grille-type structure (12) on two opposite planar faces, folded filter paper (13) being accommodated in the interior of the plastics material housing (11) and a flexible plastics material sealing lip (15) being formed on an inlet peripheral edge (14) which surrounds a grille-type structure (12), characterised in that the sealing lip (15) has a freestanding height (h) equal to between a fifth and a twentieth of the length (a) of the short edge of the rectangular cross-section, in that control portions (18) are provided on the outlet peripheral edge (17) so as to project beyond the peripheral edge (17) in the outlet direction, and in that the control portions (18) are formed on the two longitudinal peripheral edges (19, 20), a short control cam (22) being formed on one longitudinal peripheral edge (19), associated with one corner (21), and a long control cam (23) being formed diametrically opposite.
2. Extra-fine filter according to claim 1, characterised in that an integrally moulded holding strap (16) is arranged on the plastics material housing (11).
3. Extra-fine filter according to claim 2, characterised in that the holding strap (16) is formed so as to be associated with an outlet peripheral edge (17), which is positioned opposite the inlet peripheral edge (14) provided with the sealing lip (15).
4. Extra-fine filter according to any one of claims 1 to 3, characterised in that the underside of the long control cam (23) forms a rail (25), optionally a first rail, which extends so as to overlap the side face of the housing.
5. Extra-fine filter according to claim 4, characterised in that a further rail (26) is formed on the opposite housing side, associated with the sealing lip (15).
6. Vacuum cleaner (1) comprising an electric motor (6) which has a suction side (S) and an exhaust side (B), an accommodating chamber (8) being provided, on the exhaust side (B), for an extra-fine filter (7) comprising a cartridge-like plastics material housing (11) which is rectangular in plan view, said extra-fine filter (7) having a grille-type structure (12) on two opposite planar faces, folded filter paper (13) being accommodated in the interior of the plastics material housing (11) and a flexible plastics material sealing lip (15) being formed on an inlet peripheral edge (14) which surrounds a grille-type structure (12), rail recesses (27, 28) for rail portions (25, 26) of the extra-fine filter (7) being formed in the accommodating chamber (8) so as to extend in the insertion direction of the extra-fine filter (7), characterised in that end portions of the rail recesses (27, 28) open towards the exhaust side (B) of the motor (6).
7. Vacuum cleaner according to claim 6, characterised in that a rail recess (27) extends so as to be curved in portions.
8. Vacuum cleaner according to one or more of claims 6 or 7, characterised in that the filter (7) is directed onto the exhaust side (B) of the motor (6) over the last fifth of the insertion path, a sealing lip (15) of the extra-fine filter (7) being resiliently deformed, said sealing lip being associated with the exhaust side (B) of the motor (6).
9. Vacuum cleaner according to any one of claims 6 to 8, in which the accommodating chamber (8) is to be sealed by an exhaust grille (9) and projections are formed on the chamber side of the exhaust grille (9), characterised in that the projections are control projections (34) which engage the fine filter (7) from behind so as to bias it into contact with the exhaust side (B) of the motor (6).
10. Vacuum cleaner according to claim 9, characterised in that the exhaust grille (9) comprises an inspection opening (36) in which the visible side of a holding strap (16) formed on the extra-fine filter (7) is uncovered when the extra-fine filter (7) is in use.

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