Washing machine water-free zones of the drum

A washing machine for performing wet, dry, physical or chemical treatments on materials, comprising:

• a front loading or side loading perforated drum mounted respectively by a drum shaft at a rear of the drum, or by drum shafts at both sides horizontally, or having an angle with a horizontal axis, the drum mounted to a drum shaft bearing system so as to rotate around a bearing axis, the drum having a water-free zone, the water-free zone being on an outer surface of the drum and not accessible or contacted by water draining from the drum during wet treatment application processes carried out by the washing machine;
• a water chamber surrounding a wet area on the drum from which the water is discharged, the water chamber arranged to prevent the water-free zone from coming into contact with discharged water from the drum, to collect said discharged water, to prevent overflow of said water chamber, and to channel said discharged water to a water chamber drain outlet on said water chamber;
• wherein said drum comprises comprising a plurality of drum perforations in a cylindrical surface of the drum and wherein the water exiting through the drum perforations is discharged into the water chamber surrounding the cylindrical surface part of the drum having the drum perforations,
• said water chamber comprising a water flow path configured to prevent the discharged water from contacting the drum again after contact with the drum is interrupted and/or to prevent the discharged water from contacting areas or surfaces of the drum which should not contact the discharged water and/or prevent the discharged water from leaving and/or overflowing from the water chamber, the water flow path configured to enable the discharged water to reach the water chamber drain outlet and leave the water chamber, wherein a water flow capacity of said water flow path and drain out flow rate of said water chamber drain outlet is greater than a drain flow rate of the discharged water from drum such that accumulation of the discharged water in the water chamber is prevented;
• and
• a pump or pumping system having a pumping capacity greater than a flowrate of the discharged water flowing from the drum to the water chamber, the pump or pumping system configured to pump the discharged water flowing in the flow path and draining out from drain outlet of the water chamber back into the drum,
• wherein said pump or pumping system is configured to pump the discharged water from the water chamber into the drum to provide an amount of water in the drum required during a wet treatment application process and to prevent the accumulation of the discharged water in the water chamber from reaching the outer surface of the drum or overflowing from the water chamber,
• said pump or pumping system being positioned on a circulation line hydraulically connecting the water chamber to the drum,
• said drum comprising a plurality of drum perforations, wherein a number and/or size of the drum perforations is limited to enable a flow rate of the water passing through the drum perforations to be less than a pumping capacity of the pump or pumping system such that the pumping capacity of said pump or pump system is greater than a maximum water drain flow rate of the discharged water from the drum so that the discharged water draining from the drum to the water chamber does not overflow from the water chamber, reach the outer surface of the drum, or pass to the water-free zones,
• said drum comprising an external water barrier system on said drum having a plurality of external water barriers to prevent water passage from the wet area to said water-free zone of said drum, said external water barrier system configured to always keep apart of the outer surface of the drum dry by prevention of the discharged water from contact with the part of the outer surface of the drum,
• said water chamber comprising a water barrier system having a plurality of water barriers to prevent discharged water draining from the drum overflowing from the water chamber,
• said external water barriers on said drum being aligned with said water chamber barriers on said water chamber to surround the perforated part of the cylindrical surface of the drum to prevent overflow of discharged water from said water chamber, and
• said water barriers on said water chamber and external water barriers on the drum being positioned in the form of single lines or multiple cascading structure in opposite each other and side by side.