DE9312061U1 - Vacuum cleaner with a blow connection and a hygiene filter - Google Patents

Description

Description

Vacuum cleaner with a blower connection and a hygiene filter

The subject of the innovation relates to a vacuum cleaner with a blower connection and a hygiene filter, which is replaceably inserted in a filter cassette arranged in the exhaust air flow of the suction fan between exhaust air grilles, wherein the filter cassette is arranged behind a housing wall having the blower connection, in particular under the dust chamber cover for the hygiene filter, and where an exhaust air grille of the cassette covering the hygiene filter on the top is provided with a locking device that can lock the grille openings, which has a blower opening corresponding to the blower connection for connecting the suction hose or the suction hose nozzle.

Such a vacuum cleaner is known from DE-OS 35 37 937.

In the vacuum cleaner mentioned above, the locking device for the upper exhaust air grille of the filter cassette, which covers the hygiene filter, is designed as a sliding, congruent grille half that is located in the grille plane of the upper exhaust air grille, the grille webs of which close the grille openings during blowing operation. Such a blowing mechanism is expensive to manufacture and hinders the air flow during normal suction operation due to the narrow blowing cross-sections, which also create flow separations, causing flow losses. This is where the innovation is intended to remedy the situation.

Starting from a vacuum cleaner with a blower connection and a hygiene filter of the type mentioned above, the above problems are solved according to the invention by the features of claim 1.

Advantageous further training can be found in the subclaims.

The innovation results in significant design, operating and flow-related advantages. In particular, the air flow in suction mode is

The flow of the suction air generated by the suction fan through the predetermined flow paths and the automatically controlled open position and shape of the closure device as a flow guide element is not slowed down or undesirably diverted, so that the noise level of the device is also reduced.

The following description serves to explain the subject matter according to the innovation, examples of which are shown in the drawings. They show:

Figure 1 shows a vacuum cleaner in perspective view with

open dust collection chamber,

Figure 2 shows a part of the dust collection chamber with the

Dust chamber cover with the arrangement of a filter cassette for a hygiene filter,

Figure 3 an intermediate compartment in the dust compartment cover for suction accessories

and the arrangement of a blow connection in a wall of the dust chamber cover,

Figure 4 a closure device accessible via the blow connection

for blowing operation in combination with the exhaust air grille of the filter cassette in side view,

Figure 5 shows the closure device according to Fig. 4 with the exhaust air grille in

the top view,

Figure 6 shows a partial section of the vacuum cleaner in longitudinal section with

the filter cassette locking device in the "suction" operating position,

Figure 7 shows a partial section of the vacuum cleaner in longitudinal section with

the filter cassette closure device in the "blowing" operating position.

The vacuum cleaner (1) shown in Figure 1, in particular a floor vacuum cleaner equipped with a suction hose (2), telescopic tube (3) and floor nozzle (4), has a housing (5) which has a dust collection chamber (7) for a dust filter bag (8) accessible via a dust chamber cover (6). A blower chamber (9) with a suction fan (not shown) is arranged downstream of the dust collection chamber (7). The dust chamber cover (6) covers both the dust collection chamber (7) and a part (10) of the blower chamber housing (5), which is designed to accommodate a filter cassette (11) with a replaceable hygiene filter (12) as an exhaust air filter for the suction air released to the outside by the suction fan (see Figures 2, 6 and 7). The filter cassette (11) is preferably lockably secured in the vacuum cleaner housing (5).

The dust filter bag (8) inserted in the dust collection chamber (7) can be coupled, when the lid is closed, to a suction connection piece (13) for the suction hose (2) that leads to the dust collection chamber (7) and can be inserted into the dust chamber lid (6). The above-mentioned filter cassette (11) for the replaceable hygiene filter (12) essentially comprises two exhaust air grilles (14, 15) between which the hygiene filter (12) is located, whereby the lower exhaust air grille (14), as shown for example in Fig. 6 and 7, can be formed separately in the covered blower chamber housing part (10). However, this grille can also be connected to the upper exhaust air filter of the filter cassette (11), which covers the hygiene filter (12) on the top, to form a structural unit. In this case, the exhaust air grille (14) fixed to the housing could also be omitted. When the upper exhaust grille is lifted or when the filter cassette (11) is lifted or removed (Fig. 2), the hygiene filter (12) can be easily replaced.

As shown in more detail in Fig. 3, 6 and 7, the new vacuum cleaner (1) is suitable for both normal vacuuming (Fig. 6) and blowing (Fig. 7). For this purpose, the vacuum cleaner (1) is equipped with a corresponding blowing connection (16).

The blow connection (16) is formed in a housing wall (17) above the filter cassette (11) formed at least by the upper exhaust air grille (15), whereby this housing wall is the dust chamber cover (6) according to the embodiment shown in Fig. 3. The dust chamber cover (6) in its function as a housing wall (17) covering or cladding the hygiene filter (12) is double-walled, whereby a separate upper cover (18) is provided in the dust chamber cover.

angle (6) is formed, behind which the blow connection (16) in the housing wall is accessible and operable. The space (19) of the dust chamber cover (6) is formed as an intermediate compartment for necessary suction accessories (20). Between the underside of the dust chamber cover (6) carrying the blow connection (16) and the upper exhaust air grille (15) of the filter cassette (11) there is a locking device (21) which can lock the grille openings and which has an outlet opening corresponding to the blow connection (16) for connecting the suction hose (2) or the suction connection piece (13) in blowing mode.

The closure device (21) is designed as a hinged cover (23) covering the upper exhaust air grille (15) behind the housing wall or under the dust chamber cover (6), which, when the blower connection (16) is occupied, i.e. when the suction connection piece (13) is inserted, is pressed down to cover and seal the exhaust air grille (15), and moves back into its open position during suction operation, i.e. when the suction connection piece (13) is pulled out or the blower connection (16) is unoccupied. The hinged cover (23) is pivotally mounted in a free space (24) between the adjacent dust chamber cover (6) and the upper exhaust air grille (15) of the filter cassette (11). A preferred design can be such that the hinged lid (23) is pivotally connected to the upper exhaust air grille (15) as shown in Fig. 4 and 5. It could also be hinged to the vacuum cleaner housing (5) itself. Preferably, however, the hinged lid (23) is formed as one piece with the filter cassette (11) via a film hinge (25) and is automatically returned to its open position during suction operation by the spring action provided by this and/or by the exhaust air flowing through the hygiene filter (12).

Except for the exhaust opening (22) for connecting the suction hose (2) or the suction connection piece (13), the hinged lid (23) is designed to be airtight. Its underside (26) is provided with an inwardly drawn shape (27) which promotes the exhaust air flow, which, when the lid is open in suction mode, directs or redirects the blower air into predetermined flow channels (28) of the vacuum cleaner housing (5) or the storage compartment lid, thereby achieving the desired unhindered air flow during suction mode and an optimal air flow rate with a low noise level. The hinged lid (23), designed in the form of a molded-on plate, redirects the exhaust air without turbulence and calms the air flow; practically acts as a flow guide element. The special design of the upper exhaust air grille (15) also has a beneficial effect here.

which is designed in a honeycomb shape and has narrow honeycomb webs (29) that are vertical in the direction of flow of the exhaust air. These honeycomb webs (29) form separate honeycomb or flow chambers, which, although they cause concentrated partial air flows, nevertheless, with the help of the hinged cover (23) that is inclined during suction operation, together cause a flow-calming air discharge in the manner mentioned above.

When the dust chamber is closed, the folded-up cover of the closure device (21) rests against the lower edge of the dust chamber cover (30) up to the predetermined favorable inclination (Fig. 6). When the dust chamber cover (6) is open, the complete filter cassette (11) together with the closure device (21) can be removed and the hygiene filter (12) held by the exhaust air grilles (14, 15), which preferably consists of at least one single-layer electrostatically charged filter mat, can be easily replaced.

Claims (10)

Protection claims 1. Vacuum cleaner with a blower connection and a hygiene filter, which is replaceably inserted in a filter cassette arranged in the exhaust air flow of the suction fan between exhaust air grilles, wherein the filter cassette is arranged behind a housing wall having the blower connection, in particular under the dust chamber cover for the hygiene filter, and wherein an exhaust air grille of the cassette covering the hygiene filter on the top is provided with a locking device for locking the grille openings, which has a blower opening corresponding to the blower connection for connecting the suction hose or the suction hose nozzle, characterized, that the closure device is designed as a hinged cover (23) behind the housing wall (17) covering the upper exhaust air grille (15), which is pressed down by the suction hose (2) or the suction hose nozzle to cover the exhaust air grille (15) when the blow connection (16) is occupied and is controlled in the open position during suction operation when the blow connection (16) is unoccupied. 2. Vacuum cleaner according to claim 1,
characterized, that the hinged cover (23) is pivotably mounted in a free space (24) between the adjacent housing wall (17) and the upper exhaust air grille (15) of the filter cassette (11). 3. Vacuum cleaner according to claim 1 and 2,
characterized, that the hinged lid (23) is preferably pivotally connected to the upper exhaust air grille (15) and is provided on its underside (26) with an inwardly drawn formation (27) which promotes the exhaust air flow. 4. Vacuum cleaner according to claim 3,
characterized, that the opened hinged cover (23) directs or redirects the fan exhaust air into predetermined flow channels (28) during suction operation. 5. Vacuum cleaner according to one or more of claims 1 to 4, characterized in that the housing wall (17) located above the hinged lid (23) is a double-walled dust chamber lid (6), the intermediate space (19) of which can be closed with a separate upper lid (18), behind which the blow connection (16) in the housing wall (17) corresponding to the blow-out opening (22) in the hinged lid (23) is accessible. 6. Vacuum cleaner according to one or more of claims 1 to 5, characterized in that that the intermediate space (19) is designed as an intermediate compartment for necessary suction accessories (20). 7. Vacuum cleaner according to one or more of claims 1 to 6, characterized in that the hinged lid (23) is formed integrally with the filter cassette (11) via a film hinge (25). 8. Vacuum cleaner according to one or more of claims 1 to 7, characterized in that the housing wall (17) in the form of a double-walled dust chamber cover (6) also covers a part (10) of the blower chamber housing and that the filter cassette (11) with the hinged cover (23) as a closure device (21) is arranged in the covered housing part (10) of the blower chamber (9) when the dust chamber cover (6) is open so that it is freely accessible for changing the hygiene filter (12). 9. Vacuum cleaner according to one or more of claims 1 to 8, characterized in that the pivotably mounted hinged cover (23) is controlled into its open position by spring action and/or by the exhaust air flowing through the hygiene filter (12). 10. Vacuum cleaner according to one or more of claims 1 to 9, characterized in that the upper exhaust air grille (15) resting on the hygiene filter (12) is honeycomb-shaped with narrow honeycomb webs (29) that are perpendicular to the flow direction and form separate honeycomb chambers.