Hot cleaning apparatus for surfaces provided at least with a moisture sensor of the cleaning cloth

A hot cleaning apparatus for surfaces, adapted to ensure an adequate wetting of a cleaning cloth in an automatic manner, comprising:

• an upper part and a lower part joined to each other in a hinged way by a movable connection,
• the upper part comprising a support body to which an upper handle with grip and a power supply cable are joined, the support body enclosing an electronic circuit board connected to and supplied by the cable, and a tank for water joined with a first flexible or stiff pipe to an electric pump, the support body being provided on a surface thereof with a control and command means for a cleaning modality,
• the lower part comprising a main support body made of plastic and containing at least a heating means, and at least a cleaning cloth, the main support body being joined at an upper part thereof to said electric pump by a second stiff or flexible pipe in such a way that the water is able to be taken from the tank by the electric pump so as to then be conveyed toward the cleaning cloth, and
• at least an absorbing multilayer element inserted and secured in contact between said heating means and said cleaning cloth,
• wherein said absorbing multilayer element includes a quadrangular peripheral hollowed frame, into which a quadrangular body is inserted, the quadrangular body including at least a central panel made of absorbing material, to which there are respectively coupled to upper and lower surfaces thereof an upper non-woven layer and a lower non-woven layer, the non-woven layers being made of polyester material that is resistant to temperatures up to 140° C., and sensors for detecting moisture, made of conductive material and installed below said multilayer element in an insulated way therefrom, the sensors being arranged in contact with the cleaning cloth,
• wherein the central panel is adapted to receive, to absorb and to keep a certain quantity of the water that is supplied by the electric pump through the second pipe, the central panel acting as an additional water container, thereby allowing the water to flow gradually toward the cleaning cloth disposed under the central panel,
• wherein said sensors are adapted to detect an electrical conductivity value of the water in the cleaning cloth only, and the electronic circuit board is adapted to read a value of an electrical resistance R between the sensors and to compare the electrical resistance R to a reference value X pre-set at the control and command means for the cleaning modality,
• wherein, if the cleaning cloth is dry, and, consequently, the electrical resistance R is high, the electronic circuit board causes the electric pump to take the water from the tank and supply the water to the central panel, which absorbs the water and releases the water to the cleaning cloth, thereby soaking the cleaning cloth, increasing the electrical conductivity, and decreasing the electrical resistance R,
• wherein said electric pump remains active until a value of the electrical resistance R detected between the sensors is equal to or lower than the reference value X, said electric pump being adapted to turn itself off automatically when in the cleaning cloth there is present a desired quantity of the water for a desired cleaning operation, and
• wherein, during the use of the cleaning apparatus, as the quantity of water within the cleaning cloth decreases, and, consequently, the electrical resistance R increases, the electric pump is reactivated if the value of the electrical resistance R is greater than the reference value X.