Electricity: motive power systems – Armature circuit control – Impedance-controlled
Reexamination Certificate
2000-02-29
2001-07-03
Ip, Paul (Department: 2837)
Electricity: motive power systems
Armature circuit control
Impedance-controlled
C318S508000, C015S319000, C015S339000
Reexamination Certificate
active
06255792
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an intelligent suction device capable of automatically adapting the suction force, such as, for vacuum cleaners and the like.
BACKGROUND OF THE INVENTION
It is known that in a vacuum cleaner the suction force is usually adjusted manually by the user according to the surface that the user intends to clean. This system generally has a potentiometer which allows varying the speed of the motor of the fan of the vacuum cleaner. In these systems, the user must therefore manually vary the working setting of the vacuum cleaner according to the type of surface to be cleaned.
Usually, the user uses the maximum speed of the fan needlessly. In these conditions, besides having a high noise level, the energy consumption is higher than necessary and there is no improvement in the resulting cleaning.
Moreover, when the user leaves the vacuum cleaner in an inactive condition with the motor running, the suction force does not decrease. Accordingly, the fan of the vacuum cleaner continues to rotate at the rate set by the user. This is so also, for example, when the suction hose is not in contact with the surface of the floor to be cleaned. This results, therefore, in the drawbacks that energy consumption is needlessly high and the noise level is highly unpleasant.
SUMMARY OF THE INVENTION
In view of the foregoing background, it is therefore an object of the invention to provide an intelligent suction device capable of automatically adapting the suction force according to the conditions of the surface to be cleaned.
Another object of the present invention is to provide an intelligent suction device capable of automatically adapting the suction force according to the conditions of the surface to be cleaned, particularly for vacuum cleaners and the like, in which an expert system for the constant and automatic control of the working setting of the device is implemented.
Another object of the present invention is to provide an intelligent suction device, particularly for vacuum cleaners and the like, in which the energy consumption and the noise level are always optimized.
Another object of the present invention is to provide an intelligent suction device which can assume a standby condition automatically when it is not momentarily used by the user.
Another object of the present invention is to provide an intelligent suction device, particularly for vacuum cleaners and the like, in which the suction force is always closely correlated to the type of surface to be cleaned.
Another object of the present invention is to provide an intelligent suction device, particularly for vacuum cleaners and the like, which is highly reliable and relatively easy to provide at competitive costs.
These and other objects will become apparent hereinafter are achieved by an intelligent suction device particularly for vacuum cleaners and the like, characterized in that it comprises a fuzzy-logic controller suitable to control the motor of a fan, whose suction pressure is detected by at least one pressure sensor which feeds back its measurement, in a closed loop, to the controller.
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Grasso Giuseppe
Lo Presti Matteo
Sortino Gianfranco
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Galanthay Theodore E.
Ip Paul
STMicroelectronics S.r.l.
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