EP0390943A1 - Procédé pour laver des textiles - Google Patents

Procédé pour laver des textiles Download PDF

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Publication number
EP0390943A1
EP0390943A1 EP89105867A EP89105867A EP0390943A1 EP 0390943 A1 EP0390943 A1 EP 0390943A1 EP 89105867 A EP89105867 A EP 89105867A EP 89105867 A EP89105867 A EP 89105867A EP 0390943 A1 EP0390943 A1 EP 0390943A1
Authority
EP
European Patent Office
Prior art keywords
drum
washing
textiles
duration
period
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89105867A
Other languages
German (de)
English (en)
Inventor
Ilya Fedorovich Zaslavsky
Evgeny Alexeevich Panfilov
Jury Jurievich Solomatin
Valery Nikolaevich Malakhov
Vasily Vasilievich Lesnikov
Nikolai Valentinovich Krjuchkov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MOSKOVSKY TEKHNOLOGICHESKY INSTITUT
PROIZVODSTVENNOE OBIEDINENIE "PROZHEKTOR"
Original Assignee
MOSKOVSKY TEKHNOLOGICHESKY INSTITUT
PROIZVODSTVENNOE OBIEDINENIE "PROZHEKTOR"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MOSKOVSKY TEKHNOLOGICHESKY INSTITUT, PROIZVODSTVENNOE OBIEDINENIE "PROZHEKTOR" filed Critical MOSKOVSKY TEKHNOLOGICHESKY INSTITUT
Priority to EP89105867A priority Critical patent/EP0390943A1/fr
Publication of EP0390943A1 publication Critical patent/EP0390943A1/fr
Withdrawn legal-status Critical Current

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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
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only

Definitions

  • the invention relates to a method for washing textiles in household washing machines and can advantageously be used in washing machines with a drum lying horizontally.
  • the textiles are placed in the horizontal washing drum, rinsed with washing liquor and treated, the textiles being pressed periodically against the drum jacket by successively driving and stopping the washing drum.
  • the duration of the switch-off periods is equal to or less than that of the rotation period.
  • a washing method is known in which the washing drum is driven alternately in both directions of rotation.
  • the rotational movement in one direction of rotation takes place at a speed at which the separation factor F ⁇ 1 (slow rotation), the Separation factor F the intensity of the centrifugal force field means: With ⁇ angular velocity of the drum (s ⁇ 1) R drum radius (m) g gravitational acceleration (m / s2).
  • the drum rotates at a speed that is 1.5 to 2 times greater, so that the textile goods are constantly pressed against the inner surface of the drum shell.
  • the switch-off time is equal to the switchover time when reversing.
  • the energy consumption is relatively high and the washing efficiency is unsatisfactory because the textiles are constantly pressed against the drum shell during the rotating movement of the drum and the washing liquor is rapidly displaced from the rotating drum by the centrifugal force, so that they perform their main functions, ie rinsing the textiles and washing out impurities from the fabric, not met.
  • the washing liquor displaced into the space between the drum and the container does not come back before switching over to the drum, and its turbulence movement creates considerable hydraulic resistance during the rotating movement of the drum, which is a cause for the high energy consumption during the washing process only after the washing machine has been switched off
  • the wash liquor gets into the drum, wets the textiles and fills the voids between them.
  • the wash liquor is again displaced from the drum as the drum speed increases.
  • the wash liquor by flowing through the fabric of the textiles, effectively acts on the textiles and washes out the impurities. But after the wash liquor the drum with the textiles is displaced, the effectiveness of the washing process drops suddenly, while the energy consumption remains high.
  • the washing process is carried out by continuously rotating the drum at high speed, but the energy consumption is considerable and the quality of treatment of the textiles, i. H. the degree of purity and the stress on the fabric are unsatisfactory.
  • the poor washing quality is due to the continuous, rapid rotation of the drum, which quickly displaces the wash liquor from the drum and does not fulfill its functions during the washing process.
  • the textiles can only be forcibly separated from the drum shell, which means a considerable dynamic stress on the textiles, which leads to mechanical destruction and abrasion of the tissue during the treatment.
  • the considerable resistance during the work of the machine is decisive for the relatively large energy consumption.
  • the invention has for its object to provide a method for washing textiles in which the impregnation of the laundry items with the wash liquor and squeezing the same take place so that the washing quality is increased and the energy consumption for the washing process is reduced.
  • This object is achieved in a method for washing textiles in washing machines with a drum lying horizontally, the textiles being filled with washing liquor te drum are introduced and treated by the laundry in an alternating sequence of reversible forcible rotation of the drum and switching it off alternately pressed against the drum shell, according to the invention, in that the drum is rotated in each period of inevitable rotation until it has a separation factor achieved greater than a securing angular speed, the inevitable rotation of the drum takes place in an angular range of at least 70 o , and that the duration of each switch-off period, which is composed of the run-down time and the idle time of the drum, is chosen to be greater than that Duration of each period of the forced rotation of the drum.
  • the washing method according to the invention ensures by alternating periods of rotation of the drum in both directions of rotation, each of which is equal to the start-up time of the drum until a separation factor is reached which is greater than a securing speed, and by shutdown periods of the drum, each of which is dependent on the selected size of the separation factor
  • This is achieved by the alternation of short periods in which the washing liquor is intensely displaced by the textiles and longer periods in which the textiles are soaked with the washing liquor, the intensity of the hydromechanical action on the textiles being increased because one Segmental laundry in the static position is lifted vigorously, spreads under deformation against the inner surface of the jacket.
  • the wash liquor is intensely displaced as it flows through the fabric.
  • the washing method according to the invention results in a more uniform distribution of the mechanical action on the items of laundry and avoids twisting of the items of laundry, since there is no continuous rotation of the drum, which increases the capacity of the washing machine and enables items of laundry to be cleaned from any type of fabric with minimal abrasion of the fabrics.
  • the switch-off periods the duration of which exceeds that of the drive periods of the drum, significantly reduce the energy consumption.
  • the washing process according to the invention is carried out as follows.
  • the textiles are placed in a washing machine with a horizontal drum, which is filled with wash water.
  • the concentration of the detergent, the temperature and the amount of water to be filled are selected depending on the type and amount of textiles placed in the drum.
  • the reversible drive of the washing machine is switched on, the drum rotates and treats the laundry by being pressed alternately against the drum shell, in a sequence of periods of reversible forced rotation of the drum and periods in which the drum drive is switched off.
  • the drum with the textiles contained therein is accelerated from the static position in which the laundry items take the form of a segment to an angular velocity which ensures the pressing and a successive annular distribution of the laundry items over the inner surface of the drum.
  • the textiles are exposed to an intensive hydromechanical action, which is caused by the resulting joint action of tensile and compressive deformations as well as by the intensive flow of the wash liquor through the fabric of the laundry items due to the centrifugal forces.
  • the washing liquor is displaced from the drum into the container of the washing machine.
  • the speed up to which the drum with the laundry is accelerated in each rotation period is determined by the required size of the separation factor, which is in a range from 1 to 10 and is calculated according to formula (1).
  • the forced rotation of the The drum takes place in an angular range of at least 70 o .
  • the drive is switched off and the centrifugal forces cease.
  • the items of laundry separate from the jacket under the action of gravity and fall down into the lower drum part in such a way that the amount of laundry to be treated again takes the form of a segment.
  • Fig. 1 The change in the rotational speed ⁇ of the drum with the textiles in the course of a washing process is shown in Fig. 1 in which ⁇ 1 the rotational speed ensuring a predetermined separation factor F, t n the duration of the drive period and t B mean the run-down and idle time of the drum.
  • the range of possible x values is determined by the speed to which the drum is accelerated and can be calculated for drums of different diameters using the separation factor from the following relationship: 3F -0.5 ⁇ x ⁇ - 0.917F + 11 (3).
  • the wash quality decreases with increased energy expenditure for the treatment process.
  • the treatment quality drops because the textiles are incompletely soaked in the wash liquor due to the lack of time.
  • the energy expenditure for the treatment process is considerable and at x> 10 a satisfactory treatment quality is not achieved because of the long downtimes, which are considerably greater than the time required for the textile to be completely saturated with the wash liquor.
  • the washing machine with reversible forced rotation of the drum through an angle of 100 o works as follows.
  • the drive of the machine is switched on, whereby the drum with the items of laundry placed therein is rotated until it reaches an angular velocity that ensures the separation factor F> 1.
  • the previously horizontal loading area is now at an angle, some of the textiles slide down (fall) while the other part is lifted and accelerated.
  • the electric motor is switched off.
  • Some of the textiles which are raised to the maximum height, detach themselves from the amount of laundry and, after a flight on a parabolic path, strikes the drum jacket and the textiles that are immobile at the moment in the lower part of the drum.
  • the standstill of the drum and the textiles at the moment of impact is due to the fact that the main part of the laundry generates a large resistance moment which counteracts the rotating movement of the drum and brakes the drum quickly.
  • the standstill of the drum at the moment of the impact is ensured by the sufficiently large section modulus generated by the main part of the textiles.
  • the fabric of the textiles is deformed, which is accompanied by an intensive flow of the wash liquor through the fabric. This removes and removes impurities more effectively than in the conventional method.
  • the high washing quality according to the method according to the invention results from the maximum utilization of the main factor of the drum washing method, ie the mass of the laundry items themselves and the washing liquor to intensify the removal of impurities.
  • the angle of rotation of the drum can exceed the stated values, but rotating the drum by an angle of more than 1100 ° (3 revolutions) is not advisable and leads to increased foaming, a reduction in the quality of washing and an increase in energy consumption.
EP89105867A 1989-04-04 1989-04-04 Procédé pour laver des textiles Withdrawn EP0390943A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89105867A EP0390943A1 (fr) 1989-04-04 1989-04-04 Procédé pour laver des textiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89105867A EP0390943A1 (fr) 1989-04-04 1989-04-04 Procédé pour laver des textiles

Publications (1)

Publication Number Publication Date
EP0390943A1 true EP0390943A1 (fr) 1990-10-10

Family

ID=8201172

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105867A Withdrawn EP0390943A1 (fr) 1989-04-04 1989-04-04 Procédé pour laver des textiles

Country Status (1)

Country Link
EP (1) EP0390943A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4999886A (en) * 1988-12-19 1991-03-19 Yoshida Kogyo K. K. Plug and socket buckle assembly
EP0468242A1 (fr) * 1990-07-20 1992-01-29 Chemische Fabrik Kreussler & Co. Gmbh Procédé pour le nettoyage de textiles
US5335524A (en) * 1991-03-01 1994-08-09 Kabushiki Kaisha Toshiba Drum type washing machine
US5560061A (en) * 1993-03-31 1996-10-01 Bosch-Siemens Hausgeraete Gmbh Washing machine with a reversing-mode washing drum

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1284979A (fr) * 1960-04-07 1962-02-16 Pfenningsberg Gmbh Maschfab Procédé et installation pour le lavage dans une machine à laver et à essorer et machine pourvue de ladite installation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1284979A (fr) * 1960-04-07 1962-02-16 Pfenningsberg Gmbh Maschfab Procédé et installation pour le lavage dans une machine à laver et à essorer et machine pourvue de ladite installation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4999886A (en) * 1988-12-19 1991-03-19 Yoshida Kogyo K. K. Plug and socket buckle assembly
EP0468242A1 (fr) * 1990-07-20 1992-01-29 Chemische Fabrik Kreussler & Co. Gmbh Procédé pour le nettoyage de textiles
US5335524A (en) * 1991-03-01 1994-08-09 Kabushiki Kaisha Toshiba Drum type washing machine
US5560061A (en) * 1993-03-31 1996-10-01 Bosch-Siemens Hausgeraete Gmbh Washing machine with a reversing-mode washing drum

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