DE9113641U1 - Door-accessible industrial vacuum cleaner with rectangular column-shaped housing, based on a cleanable HEPA filter cell as a working filter, pneumatic cleaning technology, and a HEPA filter cell as a safety post-filter - Google Patents

Description

Ernst Wirl

Basically 37

W 6339 Nidderau 2

Herbert Obermüller

Atrium 10

W 6464 Lentil dish

Door-mounted industrial vacuum cleaner with rectangular column-shaped Housing, based on a cleanable HEPA filter cell as working filter, pneumatic cleaning technology and a HEPA filter cell working as a safety post-filter.

Short description :

An industrial vacuum cleaner is proposed which is based on a suspended matter filter cell with pneumatic countercurrent cleaning as a working filter, a suspended matter filter cell as a safety post-filter, and a suction fan in a column-shaped structure so that the fan is installed below the working filter cell and the safety filter is installed at the top of the column.

The invention relates to the creation of an industrial vacuum cleaner for the highest demands and with cleanable suspended matter filter cells, as are also used in industrial applications in dustrial dust extraction systems.

State of the art:

Commercially available industrial vacuum cleaners generally use filter media with separation levels that allow some suspended dust to pass through. This is why such vacuum cleaners are often fitted with a non-regenerable suspended matter filter. This secondary filter is also a working filter, as it must retain the dust not caught in the main filter. If this second working filter breaks, the fine dust is released. The secondary filter must be replaced from time to time.

In the case of dust extractors in connection with critical dusts, recirculation of the cleaned air would not be permitted if the second filter is a working filter. In the case of industrial vacuum cleaners, such treatment is not yet common, but is to be expected.

Another disadvantage of commercially available industrial vacuum cleaners is their relatively high noise level. The blower motors are usually located freely.

A device based on the use of commercially available suspended matter filter cells was presented in issue 8, August 1991, of the specialist magazine 'REINIGUNG, Magazine for Cleaning and Hygiene'. This device combines similar operating characteristics to those on which the device presented here is based, but requires more than twice the floor space for this task, about twice the space, and about 50% more weight. In addition, its external contours do not yet offer space for an activated carbon filter.

Cleanable HEPA filter cells, as used in the device applied for, are described in the documents G 89 10 110.3 and G 89 15 110.0.

The object of the invention is

to create an industrial vacuum cleaner that uses media with the highest degree of separation on the working filter - namely class 'S' particulate filters with a cleaning efficiency of 99.997%, which cleans these filter cells, and whose post-filter only has the function of a safety or 'police filter'. In addition to the safety filter, it should also have space for an activated carbon filter. The sound-proof installation of the blower and the installation of an exhaust silencer are also mandatory.

The pre-separation of coarse dust and particles and their discharge directly into the dust collection container are further requirements. Despite all these obligations, the vacuum cleaner must have dimensions that allow it to be pushed through normal doors and dimensions and a weight that are usually permitted for passenger lifts.

The solution is achieved

through the consistent construction of all parts and functions in a column with an almost square cross-section, in which guide channels for the cleaned and uncleaned air are housed, the fan is located at the very bottom of the column and thus contributes to a relatively low center of gravity of the vacuum cleaner.

Coarse dust and larger particles are pre-separated by the integrated fall channel for the dust-bearing air and alternatively by a cyclonic inlet above the dust collection 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
Features created:

- Large suction volumes are possible because an effective filter area of up to 17 m2 is installed, which is not otherwise achieved in commercially available industrial vacuum cleaners.

- Due to its very large filter surface, the vacuum cleaner can also be used as a dust extractor and it can perform both functions alternately.

- Due to the low weight due to the compactness
The device can also be used in residential buildings for renovation tasks
can be used, although permissible ceiling loads often exclude large-scale equipment.

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

- The housing design allows the dust

Collection room in which the dust collection container is housed. This means that 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 makes the device capable of using multiple tools.

- The unbroken, smooth surfaces of the device are easy to keep dust-free and clean.

In one embodiment

the vacuum cleaner presented for general industrial use is described. The suction fan (7), which provides a high suction pressure at an extraction capacity of 600 m3/h, for example, conveys about 13 00 m3/h when used as a dust extractor.
Below the dust collecting funnel (5) located in the lower part of the housing (10) is the space (7.1) for the fan (7), for the sound insulation technology (17), and the space (18) in which

the dust collection container (6) and - optionally - a centrifugal separator (19) arranged above it (see also Fig. 2). Above these two functional spaces, the working filter cell (1) is located on the dust collection funnel (5). In the standard version, it has the dimensions L*W*H = 610*610*292 and contains up to 17 m2 of filter surface.

Above the working filter (l) is the cleaning unit (2), which in the example presented is a nozzle bar that can be moved using a pneumatic cylinder, from which air is blown through the pockets of the filter cell (1) in a countercurrent process during the short cleaning period, causing the dust to fall into the funnel (5) and into the dust collection container (6). Above the working filter cell (1) the activated carbon filter (3) - if required - and the safety filter (4) are installed. Above this the air is released completely cleaned into the clean air duct, which is then formed as a drop duct (16) within the housing (lO) with its wall. At the bottom the duct (16) is connected to the suction connection of the suction fan (7). On the pressure side of the blower (7), the air passes through an exhaust silencer (17) and is then discharged from the device via a large exhaust grille (13) on the periphery of the housing (10).

In the preferred embodiment, the dust-containing air is introduced into a raw air fall channel (8) that is primarily integrated into the column at the top of the housing (10). The shut-off device (20) - installed more or less high up in the channel (8) - can shut off the air flow before and during cleaning of the working filter cell (1). Suction tool docking points (9) at the top of the inlet of the channel (8) or further down allow several suction tools to be connected at the same time. A larger central connection (12) can be used to dock an exhaust air line for dust extraction operation.

The fall channel (8) connects to the dust collection funnel (5) and directly also to the dust collection container (6), into which coarser particles and coarse dust can fall without reaching the working filter cell (l).

The fine particles 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 the cleaning is initiated by pressing a button. The nozzle bar of the cleaning unit (2) moves slowly over the working 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, the suction operation is enabled 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 design presented weighs approx. 300 kg and has the dimensions L*W*H = 800*800*1700. It can be moved through doors and in elevators and can be placed in almost any room.

Claims (7)

-2- Claims: 1. Door-accessible column-shaped industrial vacuum cleaner with an approximately rectangular column cross-section, equipped with a cleanable insert HEPA filter cell (1) of class 'S' as a working filter, a pneumatic cleaning unit (2) above the working filter, and another HEPA filter cell as a safety post-filter (4), designed in such a way that that a dust collection funnel (5), the dust collection container (6) and the suction fan (7) are installed below the working filter cell (1) and in the column-shaped housing (10), post-cleaning and/or safety filters - such as an activated carbon filter (3) and a safety post-filter (4) - are installed in the housing (10) above the working filter cell (1), and the cleaned air flows from top to bottom in a down-channel (16) and the uncleaned air can be guided to the funnel in a down-channel (8). 2. Device according to claim 1
designed in such a way that the dust-bearing air is not guided in a downpipe (8), but more or less directly into the funnel (5), and that an inertia or centrifugal separator can be interposed to achieve pre-separation. 3. Device according to claim 1 and 2
designed in such a way that it can also be used as a dust extractor by selecting the appropriate suction fan (7). 4. Device according to claim 1 to 3
designed in such a way that the height of the device remains below 2000 mm, the width and depth below 950 mm. -3- 5. Device according to claim 1 to 4, designed in such a way that the measuring, control and regulation technology (MSR technology) is housed flush within the housing (10). 6. Device according to claim 1 and 2, designed in such a way that the soundproofing installations (17) are accommodated within the housing (10). 7. Device according to claim 1 and 2, designed in such a way that the dust collection container (6) is accommodated in a lockable space (18).