Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1997-07-30
1999-07-13
Redding, David A.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15347, A47L 500
Patent
active
059209542
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a device which can be used for cleaning, especially to remove dust. A typical application of this invention for cleaning is a vacuum cleaner.
BACKGROUND OF THE DISCLOSURE
A vacuum cleaner is frequently used to remove dust. The main parts of a vacuum cleaner and its functions are as follows: a flow of air is produced through the vacuum cleaner, and this flow of air is sucked into a dust bag and suction tubing and also through a nozzle and blown out through an exhaust duct that may have one or more filters for the exhaust air.
It is easy to remove impurities of relatively great size with a vacuum cleaner, but small sized dust particles firstly stick to the surface to be cleaned because of the static electricity and secondly penetrate the filters for the exhaust air.
The present invention addresses the weaknesses of the present technology and provides for overcoming the static electric charges of the small sized dust particles.
The invention can be realized as e.g. a vacuum cleaner, which carefully removes small dust particles and effectively prevents them from escaping from the exhaust air back into the room.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is shown in the enclosed drawings, where
FIG. 1 shows the invented nozzle used as a conventional nozzle
FIG. 2 shows the invented nozzle used in accordance with the invention
FIG. 3 shows a block diagram of the ionization generator in the invented device
FIG. 4 shows one construction of the central unit of a vacuum cleaner in accordance with the invention
FIG. 5 shows an outline of the air flow through the air blower, the dust bag and through the filters and means of ionization.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows a nozzle (N), e.g. part of a vacuum cleaner. Nozzles of various shapes and sizes are conventional equipment for a vacuum cleaner. The suction tubing (T) of a vacuum cleaner is joined to the nozzle (N) during operation, and air is sucked through the nozzle to clean a surface (SC). Generally T consists of a flexible and a rigid tube part, which can be of telescopic construction. The nozzle (N) directs the air flow from the SC. IG is a device for ionization which generates a high voltage in the ionization electrode (IP) while in use. In FIG. 1 is shown a situation, when IP is not used. This situation corresponds to the use of a nozzle according to known technology. When the air flow goes under the nozzle it ionizes the surface SC and the itself. This mechanism is due to the differences in the dielectric constants in the surface and the air. In practice wood, plastic and cloth are charged negatively, while air positively As dust and surface (SC) are of different material or mixed with air to various degrees, they are charged with charges of different size and the dust will therefore stick tightly to the surface (SC) because of the effect of static electricity. This has been proved in practice: it is extremely difficult to remove fine dust from surfaces with a vacuum cleaner, it needs wiping with a dampened cloth or similar material.
FIG. 2 shows the use of a nozzle in accordance with the invention. The ionization device (IG) while in operation and the high voltage it produces will ionize the air with electrodes IP. The ionization of the nozzle occurs in the air flow EAF, which is arranged to occur through a special aperture W of the nozzle from ambient atmosphere. Through the effect of the ionization the charges occurring on the surface (SC) are neutralized, and the fine dust is easily carried with the air flow to the tube of the vacuum cleaner. The nozzle can the replaced, just as in known vacuum cleaners. It has been thought that the design of the nozzles could improve the practicability of the device for various spots to be cleaned.
FIG. 3 shows a block diagram of the ionization device (IG): oscillator (OSC) produces an alternative current, which together with the voltage multiplier (VM) generates a voltage of numerous kilovolts. This voltage in turn is conducted through
REFERENCES:
patent: 4751759 (1988-06-01), Zoell
patent: 5143524 (1992-09-01), Inculet et al.
patent: 5268009 (1993-12-01), Thompson et al.
patent: 5690713 (1997-11-01), Bowerman et al.
Increa Oy
Redding David A.
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