Method and device to recognize and indicate a discharge...

Fluent material handling – with receiver or receiver coacting mea – With signal – indicator – recorder – inspection means or exhibitor – Level or pressure in receiver

Reexamination Certificate

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Details

C141S001000, C141S059000, C141S065000

Reexamination Certificate

active

06237648

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a method and to a device for recognizing the level of fullness of a waste container in a suction system and, in particular, to a method and device for recognizing the level of fullness of a waste container in a suction system that includes a suction appliance driven by a motor and provided with an internal chamber kept under suction pressure and that also includes the waste container.
BACKGROUND OF THE INVENTION
As is well known even to laymen, in the sphere of work of a suction system for domestic or industrial appliances it is necessary to periodically remove or empty the collection container of the material which has been collected.
Suction systems generically describe suction appliances or vacuum cleaners driven by a motor and provided with an internal chamber comprising a filter and a collection container, referred to herein as waste container.
In this context, one recurring problem is that of recognizing the level of fullness of the waste container. This information is important both for efficient working and for a good yield from the suction system.
In fact, the working principle of a vacuum cleaner foresees that inside the appliance there is a chamber comprising the waste container and where a suction pressure is created by means of the action of the motor. The suction force of the vacuum cleaner is precisely due to the difference in pressure between the internal chamber at a low pressure and the external room pressure.
If the rotation speed of the motor is kept constant, as the waste container begins to fill up the pressure in the internal chamber tends to fall because of the presence of material which has been collected occupies space and obstructs pores in a filter, with a consequent drop in suction force.
Various solutions are currently available that allow the user to receive a warning signal when the waste container is completely full. However, nothing in the prior art offers any effective information on the actual instantaneous level of waste in the waste container and, as already said previously, this does not allow the vacuum cleaner to be used at its full potential.
SUMMARY OF THE INVENTION
One of the embodiments of this invention utilizes a controller helped by Fuzzy logic to create a sensor or level identifier incorporated in the suction system.
On the basis of such idea, a method is given for recognizing and warning of the level of filling of a waste container in a system of suction that includes a suction appliance driven by a motor and provided with an internal chamber maintained under suction pressure. The method includes foreseeing a measure of the difference in pressure between the internal chamber and the room outside the vacuum cleaner and processing the measurement through a set of rules using Fuzzy logic for producing an electric signal corresponding to the fullness level of the waste container.
Additionally, a device is provided that recognizes and indicates a level of fullness of a waste container in a system of suction that includes a suction appliance driven by a motor and provided with an internal chamber kept under suction pressure and including the waste container. The device includes a pressure sensor coupled to the chamber for detecting its suction pressure value and an electronic controller downstream of the sensor operating in fuzzy logic for supplying in output an electric signal corresponding to the fullness level of the waste container.


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