DE102008020314A1 - Electromotor controlled and driven vacuum cleaner i.e. autonomously working suction robot, for cleaning floor, has suction mouth limit unit arranged and charged by air blast flow directed in opposite direction to suction air flow - Google Patents

Abstract

The cleaner (1) has a suction mouth (5) and a rear suction mouth limit unit (7) that is arranged in a driving direction (r) and charged by an air blast flow (B) directed in a opposite direction to a suction air flow (S). The air blast flow strikes on a floor, and is separated from the suction air flow. The limit unit is directed in an outlet region (10) in the driving direction running to a floor. A brush roller (2) is arranged in the suction mouth, and the limit unit ends above the floor.

Description

The The invention relates to an electric motor operated, movable Vacuum cleaner with a suction mouth and a rear suction mouth in the direction of travel.

vacuum cleaner The type in question are known, in particular in form autonomously operating vacuum robot or the like. These have one on the floor to be cleaned facing suction on, about which by means of a suction air flow applied in the vacuum cleaner Contaminated dirt and dust particles from the soil to be cleaned and transported to a dust collector. To ensure effective cleaning of the soil is at least the in the usual direction of travel rear suction mouth edge provided a sealing to the floor to be cleaned sealing boundary. In this context, it is known this Saugraumbegrenzung scoop-like embody. The free edge of the blade edge may be in operation sealing on the floor to be cleaned. Because the permanent Contacting the Saugmundbegrenzung with the ground over the duration of use wear of the contact area pulls, it is also known, such a designed Saugmundbegrenzung nachjustierbar and / or interchangeable design.

in the With regard to the known prior art is a technical Problem of the invention seen in a vacuum cleaner in Speech type with regard to the rear Saugmundbegrenzung improved, in particular wear-free design.

These The problem is first and foremost through the The subject matter of claim 1 is solved, with a focus on it is that the Saugmundbegrenzung back of a in Opposite to the suction air flow directed blast air flow applied is who hits the ground, swept forward. The so directed blast air flow forms a virtual Saugmundbegrenzung accordingly or a virtual section of a Saugmundbegrenzung. The usual Suction air flow is contrary to the usual in a preferred embodiment Direction of movement of the vacuum cleaner directed. The blast air flow is correspondingly effective in the usual direction of travel of the vacuum cleaner. According to the proposed invention is a wear-free since towards the ground to be cleaned preferably contactless Saugmundbegrenzung created. Accordingly, there is no need for any constructive Solutions for readjusting or changing such Limit. The Saugmundbegrenzung achieved by the blowing air in the suction mode is in particular in their height, due to driving different floor coverings, variable.

Further Features of the invention are below, also in the figure description, often in their preferred association with the subject-matter of the claim 1 or explained features of further claims. But they can also be in an assignment to only individual Features of claim 1 or the respective further claim or each independently.

Of the Blasluftstrom is in one embodiment of the subject invention divided from the suction air flow, according to which the blast air flow and the suction air flow only from a suction fan during operation of the vacuum cleaner are generated. So is in this regard provided that the blast air flow on the pressure side of Sauggebläses, further example, flow outside the dust receiving chamber divided and guided to Saugmundbegrenzung is. It can continue this the entire air flow as Blasluftstrom be used; alternatively only a partial air flow. In further In an alternative embodiment, the blown air flow is constructed separately from the suction air flow and produced, for which purpose further a the Blasluftstrom building, separate Blower is provided.

is the blown air stream is separated from the suction air flow, so is the proportion of blown air in a further preferred embodiment is 50% to 100%, where the numerical bandwidth also all Includes intermediate values, especially in 1/10 increments from the lower and / or upper limit to the other limit limited.

The directed in the opposite direction to the suction air flow blowing air flow forms in one embodiment of the subject invention alone the rear Saugmundbegrenzung. In a further development of the subject invention, it is provided that the blast air flow forms only a portion of the rear Saugmundbegrenzung, namely the suction mouth to the floor to be cleaned limiting portion, while the remaining non-contacting the ground portion of Saugmundbegrenzung is solved constructively, for example in the manner of as known from the prior art, blade-like boundary. In this context, it proves to be advantageous if the Saugmundbegrenzung runs lip-like in cross-section and is directed in any case in its outlet region in the direction of the usual direction of travel extending to the ground. In this way, a blade-like configuration of the structurally dissolved portion of the Saugmundbegrenzung is achieved, more preferably the Saugmundbegrenzung in any case based on a hard floor above the bottom ends, so further preferably at a distance of a few millimeters, such as three to four millimeters. This distance of Saugmundbegrenzung is in the operation of the vacuum cleaner by means of in übli the direction of travel directed blast air stream built virtual wall bridged. Accordingly, a non-contact to the ground, variable in height and wear-free Saugmundbegrenzung is reached.

By the directed against the suction air flow Blasluftströmung to achieve the Saugmundbegrenzung the suction in the suction mouth is not negatively influenced. The soil cleaning suction air flow Immediately acts up to the virtual Saugmundbegrenzung by the Blowing air flow to the floor to be cleaned.

In a further preferred embodiment is in the suction mouth a Brush roller arranged, driven by an electric motor with their bristles on the floor to be cleaned, in particular on a carpet for loosening dirt and dust particles acts. The dust or dirt dissolved over it is transported away via the suction air flow.

The proposed solution is below also in the usual Attachments for hand-held vacuum cleaners applicable, in particular in front nozzles and / or brush / suction attachments.

below the invention with reference to the accompanying drawings, which only one embodiment represents, closer explained. Hereby shows:

1 a schematic longitudinal section through a vacuum cleaner of the type in question;

Shown and described is an electric motor driven, movable vacuum cleaner 1 , Such a device is out of the DE 102 42 257 A1 known. The content of this patent application is hereby incorporated in full content in the disclosure of the present invention, also for the purpose of including features of this patent application in claims of the present invention.

The vacuum cleaner is designed as an autonomously working suction / sweeping device, including first a rotatable about a horizontal axis x brush 2 is provided. The axis of rotation x is transversely to a usual direction of travel r of the vacuum cleaner 1 ,

The drive of the brush 2 done via a in the vacuum cleaner 1 recorded, not shown electric motor, which is fed by a, not shown, accumulator.

The brush 2 The brush sits in a vaulted manner 2 covering suction space 3 one, the down, ie to the floor to be cleaned 4 towards a window-like suction mouth 5 forms. Through the latter, the brush attacks 2 for brushing the floor 4 ,

The autonomously working vacuum cleaner 1 also has traversing wheels 6 , about which the vacuum cleaner 1 on the ground 4 supported. These bikes 6 are driven by an electric motor.

The viewed in the direction of travel r rear Saugmundbegrenzung 7 is initially formed by an acute angle to the ground 4 or to the device bottom 8th aligned dustpan 9 , in total, especially in their outlet area 10 , in the direction of the usual direction of travel r running to the ground 4 is directed. The outlet area 10 ends with vertical distance a to the ground 4 , which distance is about three to four millimeters.

In the viewed in the direction of travel r back area of the suction chamber 3 opens a suction channel 11 , Its bottom boundary is through the dustpan 9 educated.

The suction channel 11 flows away from the suction chamber 3 in a dust collection room 12 , which is covered by a filter properties having air-permeable wall 13 ,

The dust collection room 12 may be further formed in the manner of a cyclone separator. Next alternatively, in the dust collection room 12 Also be included a conventional filter bag, in which case the air-permeable bag wall, the wall 13 replaced.

The removal of the over the rotating brush 2 from the soil 4 dissolved dirt and dust particles via a suction air flow S. This is constructed by means of a conventional suction fan, which in the vacuum cleaner 1 is received driven by an electric motor. The suction fan is not shown in the drawing.

About the suction air stream S, the dust and dirt particles on the suction chamber 3 , through the suction channel 11 in the dust collection room 12 for the deposition, after which the over the wall 13 filtered air via a blow channel 14 is returned. This blow channel 14 extends in the illustrated embodiment, the lower side of the dust collecting space 12 in extension of the same underside of the dustpan 9 and flows into the area of the device floor 8th in a blow-out opening 15 , This is designed and directed by the blower 14 guided blast air flow B between the outlet area 10 the dustpan 9 and the floor 4 forward in the direction of travel swept directed at the ground 4 meets.

Accordingly, in the free space between dustpan-outlet area 10 and soil 4 on the suction air flow S striking Blasluftstrom B directed in the opposite direction to the suction air flow S, according to which the distance between the outlet area 10 and soil 4 is closed by means of the blown air stream B in operation by a virtual air wall. Accordingly, a Saugmundbegrenzung arises in the operation of the vacuum cleaner 7 one composed of the one to the ground 4 towards contactless dustpan 9 and the blown air cushion.

All disclosed features are essential to the invention (in itself). In the disclosure of the application is hereby also the disclosure content the associated / attached priority documents (Copy of the advance notice) fully included, too for the purpose, features of these documents in claims present Registration with.

1

vacuum cleaner

2

brush

3

suction

4

ground

5

saugmund

6

Verfahrräder

7

Saugmundbegrenzung

8th

Component shelf

9

dustpan

10

discharge area

11

suction

12

Dust collection chamber

13

wall

14

blow

15

exhaust vent

B

blast air

S

suction air

a

distance

r

traversing

x

axis of rotation

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10242257 A1 [0014]

Claims (5)

Electric motor driven, movable vacuum cleaner ( 1 ) with a suction mouth ( 5 ) and in the direction of travel (r) rear Saugmundbegrenzung ( 7 ), characterized in that the Saugmundbegrenzung ( 7 ) is acted on the back of a directed in the opposite direction to the suction air flow (S) Blasluftstrom (B), which sweeps forward swept onto the ground. Vacuum cleaner according to claim 1 or in particular according thereto, characterized in that the blast air flow (B) from the suction air flow (S) is divided. Vacuum cleaner according to one or more of the preceding claims or in particular according thereto, characterized in that the Saugmundbegrenzung ( 7 ) leaking lip-like in cross-section and at least in its outlet area ( 10 ) in the direction of the usual travel direction (r) running to the ground ( 4 ). Vacuum cleaner according to one or more of the preceding claims or in particular according thereto, characterized in that the Saugmundbegrenzung ( 7 ) in any case based on a hard floor above the floor ( 4 ) ends. Vacuum cleaner according to one or more of the preceding claims or in particular according thereto, characterized in that in the suction mouth ( 5 ) a brush roller ( 2 ) is arranged.