WO1993008726A1

WO1993008726A1 - Industrial vacuum-cleaner capable of moving through doors

Info

Publication number: WO1993008726A1
Application number: PCT/EP1992/002518
Authority: WO
Inventors: Ernst Wirl; Herbert OBERMÜLLER
Original assignee: T.E.T. Umwelttechnik Gesellschaft Für Lufttechnische Verfahren M.B.H.
Priority date: 1991-11-04
Filing date: 1992-11-03
Publication date: 1993-05-13
Also published as: DE9113641U1; AU2899292A

Abstract

An industrial vacuum-cleaner is disclosed, based on of a particulate air-filtering cell (1) with pneumatic counter-current cleaning (2) as working filter, a particulate air-filtering cell as safety afterfilter (4) and a suction device arranged in a column so that the suction device (7) is installed below the working filter cell and the safety afterfilter is installed at the top of the column.

Description

Description:

DOOR-WAY INDUSTRIAL VACUUM CLEANER

State of the art:

Commercial industrial vacuum cleaners generally use filter media with degrees of separation that allow some of the suspended dust to pass through. That is why such vacuum cleaners are often followed by a non-regenerable particulate filter. However, this post-filter is also a working filter, since it has to retain the dust that is not caught in the main filter. If this second working filter breaks, the fine dust is released. The post-filter must be replaced from time to time.

In the case of dedusters in connection with critical dusts, return of the cleaned air would under no circumstances be permitted if the second filter is also a working filter. This type of treatment is not yet common in industrial vacuum cleaners, but it can be expected. The vacuum cleaner presented accommodates this development.

Another disadvantage of commercially available industrial vacuum cleaners is their relatively high noise level. Most of the time, the blower motors are free. A device which is based on the use of commercially available suspended matter filter cells is presented in issue 8, Aug. 1991, of the specialist journal 'REINIGUNG, Magazin für Reinigung u.Hygiene'. This device combines similar operating properties to those of the device presented here lie, but for this task requires more than twice the floor space, about twice the space, and about 90% more weight, is therefore hardly mobile and offers no space for an activated carbon filter within the scope of its outer contours.

Cleanable particulate filter cells, such as those used in the registered device, are described in the documents G 89 10 110.3 and G 89 15110.0.

The object of the invention is to create an industrial vacuum cleaner that already uses media with a maximum degree of separation on the working filter - namely suspended matter filter of class 'S' (with a degree of cleaning of 99.997%), which cleans these filter cells, and its secondary filter only has the function of a security or 'police filter'. In addition to the safety filter, it should also offer space for an activated carbon filter. The soundproof installation of the suction device (e.g. a blower) and the installation of a exhaust silencer are also mandatory. The pre-separation of coarse dust and parts and their discharge directly into the dust collector are further requirements. In spite of all these duties, the vacuum cleaner must have dimensions that allow it to be pushed through conventional doors, and dimensions and weight that are usually permitted for passenger elevators and that allow ceiling loads in commercial and public buildings.

The solution is achieved through the consistent construction of all parts and functions in a column with an approximately square cross section, in which guide ducts for the cleaned and the unpurified air are also accommodated. The mostly heavy suction device sits at the bottom of the column and thus contributes to a relatively low center of gravity of the vacuum cleaner.

Coarse dusts and coarser particles are pre-separated by the integrated drop channel for the dust-carrying air and alternatively by a cyclonic inlet above the dust collecting container. The load on the working filter cell is considerably reduced.

Advantages: In addition to the advantageous properties already desired in the task, a number of valuable properties are created:

- Large amounts of suction are possible, since an effective filter area of up to 17 m2 is installed, which - compared to that in many industrial vacuum cleaners - is several times larger.

- Due to its very large filter area, the vacuum cleaner can also be used as a deduster and it can alternately fulfill both functions.

- Due to its compact weight, the device can also be used in residential buildings for renovation tasks, although often permissible ceiling loads rule out a large-scale device.

- The device also offers space for an activated carbon filter.

- The housing concept allows the dust collection room in which the dust collection container is housed to be locked. As a result, a very high safety standard and a completely contamination-free change of the dust collection container can be achieved, especially with critical dusts.

- The high suction power also makes the device multi-tool capable, if desirable and if permitted. - The unbroken, smooth surfaces of the device are easy to keep dust-free and clean.

In an exemplary embodiment according to FIG. 1, the vacuum cleaner presented for general industrial use is described. The suction device (7) (here a blower), which e.g. with a suction power of 600 m3 / h brings a high suction pressure, promotes, for example, about 1300 m3 / h with dust extraction.

Below the dust collecting funnel (5) located in the lower part of the housing (10) is the space (7.1) for the blower (7), for the sound insulation technology (17), and the space (18) in which the dust collecting container (6) and - optionally - a centrifugal separator (19) arranged above this (see FIG. 2). The working filter cell (1) sits on the dust collecting funnel (5) above these two functional spaces. In the standard version it has the dimensions L * W * H = 610 * 610 * 292 and then contains up to 17 m2 filter area.

The pneum. Is located above the working filter (l). Cleaning unit (2), which in the example shown is a nozzle bar that can be moved by means of a pneumatic cylinder, from which clean air is blown through the pockets of the filter cell (1) during the brief cleaning period in a countercurrent process, causing the dust to enter the funnel (5) and falls into the dust collector (6).

The activated carbon filter (3) - if one is required - and the safety filter (4) are installed above the working filter cell (1). The air is discharged into the clean air duct (16) in a completely cleaned manner, which is then formed as a drop duct within the housing (10) with its wall. At the bottom, the channel (16) is connected to the suction connection of the suction fan (7). On the pressure side of the blower (7), the air passes through a blow-out silencer (17) and is then released from the device via a large-area blow-out grille (13) on the periphery of the housing (10).

In the preferred embodiment, the dust-containing air is introduced at the rear bottom of the housing (10) into an unfiltered air drop duct (8) which is primarily integrated in the column. The shut-off device (20) - installed more or less far up on the channel (8), can shut off the air flow before and during the cleaning of the working filter cell (1). Suction tool docking point (s) (9) allows connection of the suction tool (s). The larger central connection (12) can also be used to dock an exhaust air line for deduster operation. The drop channel (8) connects to the dust collection funnel (5) and directly to the dust collection container (6), into which coarser parts and coarse dust can fall without reaching the working filter cell (l). The fine portions are blown with the air into the lower pockets of the working filter cell (1), where they settle on the filter surface until the next cleaning. This cleaning is either triggered automatically (e.g. via differential pressure), or cleaning is initiated at the push of a button. In the exemplary embodiment, the nozzle bar of the cleaning unit (2) moves slowly over the work cell and blows clean air downwards and through the pockets of the filter cell, so that the dust falls into the dust collection container (6). After the set dust settling time, suction operation is released again and the shut-off device (20) opens.

The devices for measuring, controlling and regulating are housed in a special MSR room (14).

A device of the construction shown weighs approx. 300 kg and has the dimensions W * L * H = 800 * 1000 * 1700. It can be moved through doors and elevators and placed in almost all rooms.

Claims

Expectations:

1. More columnar equipped with a cleanable slide-in suspended particle filter cell (l) of class 'S' as a working filter, a pneumatic cleaning unit (2) above the working filter, and a further suspended particle filter cell as a safety secondary filter (4) Industrial vacuum cleaner with a preferably rectangular column cross-section designed such that a dust collection funnel (5), the dust collection container (6) and the suction device (s) (7) are installed in the housing below the working filter line (1) and in the columnar housing (10) (10) above the working filter cell (1), and / or safety filters, such as an activated carbon filter (3) and (a) safety post-filter (4), that the cleaned air can be installed in a drop channel (16) from top to bottom flows, and the unpurified air can preferably be guided to the funnel in a drop channel (8) guided on the wall of the housing (10), and that at / in this F All channel (8) the shut-off device (s) for the air to be sucked in and the connection possibility (s) for a suction pipe or hose (s) can be installed.

2. Device according to claim 1, that the dust-carrying air to be cleaned is not in a drop channel (8), but rather o.w. can be guided directly into the dust collector (5), and that a mass inertia or centrifugal separator (19) can be connected upstream to achieve a preliminary separation.

3. Device according to claim 1 designed in this way. that the drop channel (8) for the unpurified air can be opened, cleaned or further equipped.

4. Apparatus according to claims 1 and 2 that the suction device (7) can be multi-stage and can consist of various suction units.

5. Apparatus according to claim 1 and 2 d e r a r t designed that the measurement, control and regulation technology (MSR technology) is housed flush within the housing (10).

6. The device according to claim 1 and 2 d e r a r t designed that the sound insulation installations (17) within the housing (10) find space.

7. The device according to claim 1 and 2 d e r a r t designed that the dust collector (6) is housed in a closable space (18).

8. The device according to claim 1 to 7 d e r a r t g e s t a l t e t that the height of the device preferably remain below 2000 mm and the width below 950 mm.

9. The device according to claim 1 d e r a r t g e s t a l t e t that preferably on the shaft and connection side (rear) of the housing (10) further peripheral devices and tools are accommodated.