Gas separation – With nonliquid cleaning means for separating media – Solid agent cleaning member movingly contacts apparatus
Patent
1991-07-16
1993-12-07
Hart, Charles
Gas separation
With nonliquid cleaning means for separating media
Solid agent cleaning member movingly contacts apparatus
55248, 55255, B01D 4702
Patent
active
052680100
DESCRIPTION:
BRIEF SUMMARY
The subject matter of the invention is a Vacuum Cleaner which features a vacuum chamber, a motor-driven blower, which generates a negative pressure in the vacuum chamber, and whose aspiration port leads into the vacuum chamber, and a suction line for the dust, which is connected with the vacuum chamber.
Vacuum cleaners of this design exist in numerous versions. Due to the negative pressure produced by the blower in the vacuum chamber, dust is drawn into the vaccum chamber via the suction line. To prevent the dust from escaping again through the air-outlet openings of the blower, the vacuum chamber must be provided with a filter, normally a filter bag, to retain the dust. In conventional vacuum cleaners, this filter is made either of textile fabric, bonded fiber fabric for example, or air-permeable paper. It is absolutely necessary that the filter be permeable to air as otherwise the blower cannot produce the negative pressure in the filter chamber. A certain air throughput through the filter must be ensured; otherwise the negative pressure would be too small, and the motor which propels the blower would not be sufficiently cooled by the air supplied by the blower and become liable to damage. The consequence would be that fine dust particles are drawn through the filter and, via the air-outlet openings of the blower, hurled back into the room from which the dust should be removed by the vacuum cleaner. This drawback cannot be eliminated, not even by arrangement of several filters one after the other as featured by some vacuum cleaners. Especially viruses and bacteria are not retained by the filter of conventional vacuum cleaners, but escape back into the room to be cleaned, where they are mixed with the air leaving the air-outlet openings of the blower, so that the employment of conventional vacuum cleaners may be rather detrimental, especially in areas such as hospitals. The use of conventional vacuum cleaners may be particularly harmful in rooms occupied by people suffering from dust allergies as well as in rooms in which computer installations are accommodated.
The invention presented aims at eliminating the disadvantages of conventional vacuum cleaners and at creating a Vacuum Cleaner in which practically the entire dust drawn up via the suction line is kept back, so that no small particles can escape through the air-outlet openings of the blower. To solve this problem, the inventor proposes to place a liquid container beneath the vacuum chamber that is connected with the latter, to run the suction line from its end on the bottom of the liquid container upward, and to provide, above the end of the suction line in the liquid container, lamellae that are arranged transverse to the upward suction line and extend only over a part of the cross section of the liquid container, with adjacent lamellae partly overlapping each other.
Designing the Vacuum Cleaner according to this invention results in the advantage that the dust drawn up via the suction line is transported into a liquid bath where; it is mixed with the liquid and finally settles on the bottom of the liquid container in the form of sludge. The same happens with fine dust particles as well as bacteria, viruses and the like, which are bound in the liquid and cannot be returned into the room to be cleaned.
By the negative pressure, which exists in the vacuum chamber, a natural current of air is generated in the liquid so that the dust is drawn up via the suction line entering the liquid container, and at the same time turbulences are created in the liquid. The lamellae contained in the liquid container act now as a turbulence brake for the liquid and prevent the liquid from being carried along by the current of air and from entering the vacuum chamber located above the liquid level and from there, via the aspiration port of the blower, into the blower and the air-cooled blower motor, and from being hurled back into the room to be cleaned. Due to the lamellae configuration, the air flows mainly in parallel direction to them, i.e. mainly horizontal, wit
REFERENCES:
patent: 852543 (1907-05-01), Deckebach
patent: 1964794 (1934-07-01), Gilbert
patent: 2143188 (1939-01-01), Coulter
patent: 2164833 (1939-07-01), Norman
patent: 2468934 (1949-05-01), Kleyn
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