DE2847512A1 - SUCTION CLEANING DEVICE - Google Patents

Description

PATENTANWÄLTE ZENZ & HELBER D 43OO ESSEN 1 AU RLIHFiSTElN 1 TEL .: (O2 01) 412687 Page -XT- V 27

VAX APPLIANCES LIMITED ■

Abra House, 168 Worcester Road, Bromsgrove, Hereford & Worcester England

Suction cleaning device

The invention relates to a Saugrexnigungsgerat for Cleaning floors, carpets, walls, carpets, curtains, Upholstery or the like.

Albeit the invention as a multipurpose vacuum cleaner for use both as a dry vacuum cleaner and as a water vacuum cleaner was developed, the present invention is concerned with a particular arrangement for collecting liquid in a water extraction purification process.

Starting from a suction cleaning device with a collecting device of liquid-suitable container, which is connected via an inlet to a liquid-sucking suction head, and a Motor-driven suction device, the suction inlet of which is connected to the latter for creating a negative pressure in the container stands, it is proposed according to the invention that the suction duct for sucking in air from the container to the suction device has a downwardly flared, conical funnel which extends from the suction inlet into the interior of the container and has a perforated screen on the open underside.

This screen serves the dual purpose of, on the one hand suction of generated on the surface of the collected water in the container to prevent foam in the cone and on the other hand to contribute to the suppression of the production of such a foam-promoting turbulence in the cone.

z / * o. 909819/0771

In the following the invention is explained in more detail with reference to an embodiment shown in the drawing. In the Drawing show:

Fig. 1 shows a preferred embodiment of the vacuum cleaning device in side view with an attached, detachable reservoir for the cleaning liquid;

Fig. 2 is a sectional view taken along line A-A of Fig. 1; and

FIG. 3 shows a horizontal section along the line C-C of FIG. 2.

The vacuum cleaning device shown in the drawing has a main container 10, the open top through a lid arrangement 20 is closed, wherein either a reservoir 60 when using the device for water extraction cleaning or a dust filter arrangement not shown in the drawing when using the device as a vacuum cleaner between the main container 10 and lid assembly 20 can be used. A blower wheel 27 driven by an electric motor, which generates the suction air flow, is combined in the cover arrangement 20 provided with a valve arrangement 40, wherein the exhaust air is passed from the fan wheel into the interior of the reservoir, if the latter is used, or alternatively a connection to the outside atmosphere is established if the reservoir is not inserted.

The main container 10 has on its side wall 10a a projection 11 for receiving a not shown in the drawing Connection piece of a suction hose. The approach 11 is for this purpose with a circular opening 12 and recesses 13 is provided, and an opening 14 is formed in contrast in the upper part of the side wall 10a of the container 10 so that Air together with this entrained dust or water from the hose directly into the interior of the container for example can flow in in the radial direction.

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The fan wheel 27 in the cover assembly 20 has an intake port on its underside through which air from the area is sucked in under the cover assembly, and exhaust air from the impeller is via the .Ventilanordnung 40 either to the outside atmosphere or through a central exhaust port 34 leading to an air intake duct for the fan wheel forming ring 35 is arranged concentrically.

The reservoir 60 has an outer ring 74 between the upper Edge of the main container 10 and the lower edge of the lid assembly 20 is used in the manner shown in Figs. The outer ring 74 has an inwardly facing flange 73, the. one bounded by a generally cylindrical outer wall 63 and a frusto-conical inner wall or cone 64 integral ring cup 62 carries. The cone 64 supports a funnel 65 which cooperates with the valve assembly 40 such that Exhaust air from the GeHäserad 27 is automatically passed through the opening 34 into the interior of the reservoir. To this Sufficient pressure is generated in the trough 62 in order to transfer cleaning liquid from this via a line 77 to a (not shown) cleaning head to transport, to which the liquid on a carpet or another to cleaning material is applied.

The funnel 65 serves to establish the connection between the inlet of the impeller 27 and the one below the reservoir 60 arranged main container 10 and therefore acts as a suction inlet for the container. In this way, suction pressure can be reduced to the previously mentioned hose are applied, which is connected to the main container via the opening 12 and connects the cleaning head, whereby cleaning liquid is sucked out.

In order to facilitate the separation of the entrained liquid droplets from the incoming air, the air flow becomes direct directed at a flat surface 86 which is formed on the annular wall 63 of the trough 62 and as shown in FIGS. 2 and opposite the outer wall 10a of the container in the inward direction

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is spaced. In this way, the incoming air is distributed in all directions, and the sudden change in direction The flow of air as the air hits the flat surface 86 helps separate the liquid droplets at, which collect on the outer surface of the annular wall 63 and at a distance above the bottom of the container 10 arranged paddling 79 on the underside "of the trough

62 and drain from there into the main container 10.

The arrangement through which the sucked air from the suction hose enters the main container 10 essentially radially and in opposite directions around the ring wall

63 of the trough 62 flows, serves largely to prevent turbulence and the formation of a vortex in the Manner that foam is generated on the surface of the liquid collected in the container 10 x.

In order to further reduce the risk of such foam being generated, a liquid filter assembly 80 is below the conical funnel 64 is arranged. A ring 81 is provided with a flange 82 which fits snugly into the flange 79 fits, and a central port 83 is supported by radial ribs 84 which is a plastic mesh filter exhibit as an integral component. The filter 85 further reduces the risk of vortex formation during suction the air through the cone 64. In addition, the mesh size can be selected so that the passage of foam is prevented will.

For this purpose, the holes formed by the meshes can typically be a maximum of about 0.15 mm, preferably wisely, however, have an opening diameter of 0.02 mm.

To prevent liquid from being sucked up into the impeller 27 when the capacity of the main tank is exceeded, an overflow valve 70 is provided. This

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consists of a spherical "float 69, which is between three guides 71a is guided, which extend from the center of the conical funnel 64 downwards and a float locking disk 72 at its lower ends wear. The funnel 65 has a seat 68 for the float 69.

The guides 7la are on the vertical edges of associated triangular wings 71 below the cone 64 of the Reservoir formed. Since the wings are generally triangular in shape, alternate embodiments thereof vertical edges themselves serve as guides for the float 69. Each of these arrangements has the advantage that To further restrict the possibility of the formation of a vortex below the cone 64, to the extent that a filter assembly 80 could be omitted. Nonetheless, the filter arrangement is preferably provided because it has the Has the function of a screen which is essentially impermeable to the passage of foam.

Although the invention has been described above in connection with an apparatus in which the cleaning liquid pressed into the cleaning head by overpressure caused by the exhaust air of the fan wheel 27 in the reservoir 60, it is easy to see that the invention can also be used with other types of vacuum cleaning devices to which the cleaning liquid is supplied in another way, for example by a suitable pump. aside from that the invention is applicable to suction cleaning devices, which are themselves not suitable, the cleaning liquid to the To feed cleaning head, but should only be used to suck off the cleaning liquid. If not Liquid reservoir is provided or the reservoir is not inserted into the container, the latter is used or the Lid part 20 or another component inserted between the container and the lid part for holding one of the wall 63 of the trough or bowl 62 / described embodiment corresponding ring wall "

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Claims (6)

PATENTANWÄLTE ZENZ & HELBER D 43OO ESSEN AtV RL ¹ HFiSTEIN 1 TEL .: (02 01) 4126 Page -tfT- V 27 Expectations (l. / Vacuum cleaning device with a to catch liquid suitable container which is connected via an inlet to a liquid-sucking suction head, and a motor-driven suction device, whose suction inlet sum creating a negative pressure in the container with the latter in Connection is, thereby marked, h net that the intake duct for sucking in air from the container (10) to the suction device has a downwardly widened, conical funnel (64) which is extends from the suction inlet (65) into the interior of the container (10) and at the open bottom with a perforated Screen (80) is provided. 2. Vacuum cleaning device according to claim 1, characterized in that several substantially vertically extending Wings (71) are provided within the conical funnel (64). 3. suction cleaning device according to claim 1, characterized in that a shut-off valve (70) in alignment with the suction inlet (65) is arranged, which is the suction inlet depending on the level of the collected in the container (10) Liquid closes. 4. suction cleaning device according to claim 3, characterized in that the shut-off valve (70) is a float valve and the suction inlet (65) forms a seat surface (68) for the float (69). Z / ko. 909819/0771 ORIGINAL INSPECTED 5. suction cleaning device according to one of claims 1 to 4, characterized in that the conical funnel (64) Part of an annular trough (62), which acts as a reservoir for the cleaning liquid received in the container (10) serves, and that means are provided for dispensing the liquid from the reservoir to the suction head. 6. suction cleaning device according to claim 5, characterized in that that the reservoir (60) is arranged interchangeably on the container (10), so that a dust filter arrangement can be used in replacement of the reservoir when using the device as a vacuum cleaner. 909819/0771