Patent
1982-11-05
1984-12-25
Wayner, William E.
98 346, F24F 900
Patent
active
044896450
DESCRIPTION:
BRIEF SUMMARY
The invention is concerned with a clean-room chamber having an interior room and an opening, in particular an entrance enabling a person to enter the interior room, and means for the generation of an air-flow.
There are a number of working procedures in various branches of industry that have to take place under clean-room conditions. Particularly high demands are made by the electronics, optical, and pharmaceutical industries. In the pharmaceutical industry, e.g., the making of pellets and other critical procedures of manufacture, filling, and packaging take place in clean-room compartments. Clean-room conditions for pharmaceutical products are, moreover, regulated by government regulations, of which, e.g., the GMP-Directives (Good Manufacturing in Practice) of the World Health Organisation may be mentioned. An especially critical problem is the processing of powdery products under clean-room conditions, because in this case, it is necessary not only to take the protection from contamination into consideration, but also to protect the operators of the machine from the effect of the dust, while they must not be hampered thereby in their work. That means that, in addition to the clean-room requirements, aspects of ergonomics and of industrial safethy must be taken into account. This set of problems occurs, e.g. when a tabletting machine is set up in a clean-room compartment. Clean-room compartments are known in which the ventilating system comprises an entire wall of the room or a ceiling and generates, over the entire room a horizontal or vertical, more or less laminar displacement flow for the removal of the dust. This solution requires an expensive design and, in addition, requires much energy, due to the large air volumes that are revolved.
That is where the invention comes in. The problem was the creation of a clean-room chamber that is more favorable, inasmuch as the capital expenditure and the energy requirements are concerned, and that, nevertheless, the demands made upon it as to protection from contamination, as to ergonomics and industrial safety satisfies in their entirety.
This problem is solved by a clean-room chamber of the type indicated at the outset: the chamber in accordance with the invention is characterized by the fact that an air-supply member is present, with an outlet turned toward the interior room and having an adjustable position. Advantageous developments of the chamber are evident from claims 2 to 8.
In addition, the invention is concerned with a method of operating the cabin, by generating--in its interior space--an air flow, preferably a dust-displacement flow with little turbulence. In accordance with the invention, the method is characterized by the fact that, in the upper region of the chamber, filtered air is fed into it. An advantageous development of the method is evident from claim 10.
By the use of the clean-room chamber in accordance with the invention, and of its developments, the following advantages may be achieved:
The clean-room chamber which is developed, in particular, as a cabin with an interior room that is walkable by a person, makes it possible to work, ergonomically and in accordance with government regulations, with powdery pharmaceutical products, under improved economic conditions.
The design of the clean-room chamber makes a targeted dust exhaustion and elimination possible, so that conditions of environmental protection can be complied with more thoroughly. In addition, the operational parameters can be modified easily according to the application in each case.
Expedient operation is ensured by the ease of operation and by the clear arrangement of the chamber. Lastly, the chamber can be cleaned easily and without any great effort.
All the operational parameters that are relevant to the functioning of the clean-room chamber can be comprehended and documented without any great expense.
In the following, the invention will be explained on the basis of an example of the embodiment of a clean-room cabin as shown in the drawing. In the drawing, there are sh
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Sirch Edgar
Vicariesmann Jurgen
Glatt Maschinen - und Apparatebau AG
Sollecito John
Wayner William E.
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