Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
  • D06F35/005—Methods for washing, rinsing or spin-drying
  • D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying only

Definitions

• the invention relates to a method for washing laundry such that it does not adhere to the drum, in washing machines with a horizontal or vertical axis drum, which method comprises one or more laundry centrifuging cycles at the end of the washing and/or rinsing cycles.
• laundry centrifuging cycles The purpose of laundry centrifuging cycles is to reduce as far as possible the moisture contained in the said laundry so as to ensure an easier, quicker and more complete subsequent drying cycle.
• the drum In order to obtain the maximum drying effect, the drum is made to rotate at a speed, on average, of about 100/1200 rpm and sometimes at even higher speeds. At this centrifuging speed, a reduction in the water-content of the laundry, up to a value equal to about 50% of the weight of the laundry itself, is obtained. At the same time, however, the high stresses during centrifuging and the large quantity of water present cause the laundry to adhere to the drum.
• the compression and resultant adhesion of the laundry to the walls of the drum are caused by the high centrifuging speed and the large quantity of water present.
• the laundry is compressed with a force which can reach values from 100 to 300 times the weight of the laundry itself, which, in addition to adhesion to the walls, also favours bunching and matting of the laundry.
• the invention aims to provide a washing method which enables the abovementioned drawbacks to be overcome and which, by means of simple and inexpensive measures, helps render fully automatic the washing and drying processes, avoiding having to interrupt the automatic sequence of the cycles in order to carry out manual operations.
• the invention achieves the abovementioned objects with a washing method of the type described at the start, in which prior to the conventional high-speed centrifuging cycle, at least one low-speed centrifuging cycle is performed.
• drum rotation speeds which range between the washing speeds and the fast-centrifuging speeds and in particular are comprised between 200 and 600 rpm, preferably between 300 and 500 rpm.
• the high-speed centrifuging cycle may be carried out at speeds variable between 800 and 1200 rpm, preferably between 800 and 1000 rpm.
• At least one intermediate separating, remixing and airing cycle which is performed at the normal washing speed of the drum, in particular from 30 to 60 rpm.
• the intermediate cycles of low-speed centrifuging and of separating, remixing and airing at washing speed which precede high-speed centrifuging may be more than one and may be performed in direct succession or alternating with one another in any desired combination.
• the high-speed centrifuging cycle may be repeated several times directly in succession or intercalated in any desired combination with the low-speed centrifuging cycle(s) and the separating, remixing and airing cycle(s).
• the latter may be both manual, i. e. conventional hanging out and drying in the open air, and automatic, as in washer-drier machines.
• centrifuging and drying may be performed with a single completely automatic process, without interruptions and without requiring any intermediate manual operations for rearranging of the laundry, in particular between the centrifuging cycles and hot-air drying cycles.
• the invention is not limited to the embodiments described here, but may be widely varied, in particular with regard to the particular speeds of rotation during the various centrifuging and remixing cycles, the number and duration thereof and their combination all of which without departing from the underlying principle described above and claimed below.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Control Of Washing Machine And Dryer (AREA)
• Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
• Treatment Of Fiber Materials (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=11341403

Family Applications (1)

Country Status (2)

Cited By (2)

Citations (5)

• 1996
  • 1996-05-14 IT IT96BO000267A patent/IT1285703B1/it active IP Right Grant
• 1997
  • 1997-05-14 EP EP97830225A patent/EP0807706A3/de not_active Ceased

Patent Citations (5)

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