EP0236282B2 - Machine à laver ayant une consommation électrique réduite - Google Patents

Machine à laver ayant une consommation électrique réduite Download PDF

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Publication number
EP0236282B2
EP0236282B2 EP87830069A EP87830069A EP0236282B2 EP 0236282 B2 EP0236282 B2 EP 0236282B2 EP 87830069 A EP87830069 A EP 87830069A EP 87830069 A EP87830069 A EP 87830069A EP 0236282 B2 EP0236282 B2 EP 0236282B2
Authority
EP
European Patent Office
Prior art keywords
drum
washing
rib
rotation
water
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.)
Expired - Lifetime
Application number
EP87830069A
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German (de)
English (en)
Other versions
EP0236282B1 (fr
EP0236282A1 (fr
Inventor
Roberto Bertazzoni
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.)
Smeg SpA
Original Assignee
Smeg SpA
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Publication date
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Application filed by Smeg SpA filed Critical Smeg SpA
Publication of EP0236282A1 publication Critical patent/EP0236282A1/fr
Publication of EP0236282B1 publication Critical patent/EP0236282B1/fr
Application granted granted Critical
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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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
    • D06F37/065—Ribs, lifters, or rubbing means forming part of the receptacle ribs or lifters having means for circulating the washing liquid

Definitions

  • the present invention relates to an improved washing machine with a reduced power consumption, and in particular a machine capable of performing, in a traditional rotating drum, a washing cycle of a quality as good as the one obtained with the prior art machines, in spite of a limited water quantity being employed, and therefore with reduced consumption of detergent and electric power for heating.
  • the washing effect is obtained by the dynamic action mechanically exerted by the alternate rotation of the perforated drum in which the clothes are placed being immersed in the water and detergent solution contained in the washing tank and drum through the holes of the latter.
  • This mechanical action is also favoured by a certain number of dragging ribs extending longitudinally on the inner cylindrical wall of the drum and radially projecting towards its rotation axis.
  • the quantity of water with detergent contained in washing tank should therefore be such as to ensure a sufficient level height for soaking the laundry articles in the drum. If the height is insufficient, the washing effect would be unavoidably poor.
  • washing machines have been lately manufactured in which a sufficient soaking of the fabrics is ensured, in spite of the reduced water feed, by adopting a solution providing for a re-cycling of water contained in a boiler communicating with the washing tank by means of a recovery conduit, this water then falling again as a jet onto the fabrics within the drum through the holes thereof.
  • This solution however requires that, in addition to the usual discharge pump, another circulating pump is applied to the container-boiler, which draws water from the boiler and delivers the same to the outlet section of the above-mentioned jet through a conduit.
  • the water jet is directed, rather than to the outside of the drum, to the inside thereof, directly onto the items to be washed through an inlet nozzle from the door chamber.
  • FR-A-1299679 discloses, in combination with a washing, rinsing or bleaching machine, having a feeding and degreasing auxiliary tank, a perforated drum rotatably mounted within a stationary housing connected with said auxiliary tank.
  • Said drum is provided with rib-shaped "hoppers” or “troughs” having protruding elements or deflectors which are suitable to dip into the water between drum and housing and to feed it into said hollow ribs adapted to contain the washing liquid during a part of revolution of the drum and then to discharge it again into the inside of the drum, as said ribs are formed with perforations.
  • Washing machines provided with hollow inner ribs in the rotating drum, with inlet openings to take in water from the tank and outlet holes to discharge the same onto the articles to be washed within the drum are also known from DE-A-3 527 724, DE-A-1 485 070, GB-A-673 887 and GB-A-222 420, according to all of which no auxiliary tank is required.
  • DE-A-3 527 724 gives no indication about the position of the discharge holes.
  • DE-A-1 485 070 discloses a longitudinal partition wall in symmetric paddles provided on a drum-like rotating housing in connection with a special machine having various washing stations, wherein the clothes are in counter-flow movement with respect to the washing fluid, from a feed inlet to a discharge outlet.
  • each of said ribs is formed with a division in two longitudinal chambers, each of which being provided with an opening at opposite sides of the rib with an inlet mouth inclined toward opposite directions, each time in the direction of rotation of the drum suitable to carry out a dynamic action on the related half rib, the outlet holes being also provided on opposite sides symmetrical to the central line of the rib to cause some water to be stored therein before being discharged through said holes according to the corresponding rotation direction of the drum.
  • a motor-flywheel unit 1 is conventionally mounted on the frame 2 of the washing machine according to the invention in order to rotate, as it is known about a horizontal axis X-X, a cylindrical perforated drum 20 at the inside of a chamber or tank 10 wich encloses the same. Again in a traditional way the inside portion of drum 20 is accessible from outside through a door 12.
  • the diameter of tank 10 is kept as small as possible, while reducing at the same time the size of gap 15 between drum 20 and inner wall of the washing tank 10.
  • Such a gap can be brought to a minimum size of about 12 mm at the front side of the drum, as required by the unavoidable clearance between the two walls, when considering that the rotating drum is subject to vibratory and oscillating movements of its axis X-X, also depending upon the load of the articles to be washed and their more or less uniform distribution.
  • the size of the gap can even be decreasing towards the rear side of the machine, where the drum is less subject to transverse movements, such as by making the washing tank slightly tapered, with a greater diameter at the front side.
  • the heating resistance 16 is housed as it is known in a recess 14 formed for this purpose at the lower portion of the wall of the tank itself, i.e. in the zone which during the operation is certainly covered with water, as is better seen in Fig. 2.
  • the periphery of the drum 20 has on his outer surface means for taking and temporary storing a given quantity of water which is drawn from the lower zone of gap 15 upon rotation of the drum, to be subsequently poured downwards onto the fabrics in the drum while the rotation continues.
  • each of such means can be advantageously provided by the dragging spokes or ribs usually included in the known washing machines to enhance the mechanical action onto the fabrics to be washed by driving them into rotation with the drum.
  • These ribs are formed hollow for obvious reasons of weight reduction and saving of material, and according to the invention are modified as follows. Designated 22, 22', 22" in Fig. 2, these ribs having a cylindrical cross-section with the apex radially directed towards the axis X-X of the drum and evenly distributed along the drum periphery (in the case shown at an angular distance of 120° from each other, as they are in number of three), all show an opening 23 which communicates their inside with the gap 15.
  • the opening 23, defined by a slightly inclined member 21, is directed facing the rotation direction of drum 20, whereby during the washing operation the inside of each rib 22 is filled with the liquid in the lower portion of the gap by dynamic effect, when opening 23 comes into contact therewith and, as the drum rotation continues (in a counterclockwise direction in Fig. 2), the liquid flows out therefrom through holes 25 provided at the apex portion of each rib.
  • the holes 25 are formed beyond the apex portion, in the indicated direction of rotation, in order to ensure that the water received within each rib will be discharged when the latter has reached a given angle with respect to the horizontal, i.e. at a predetermined height from the articles in the drum, this height in fact depending on the position of said holes 25. A better distribution is thus obtained of then water which sprinkles on the fabrics to be washed in a rain- like fashion.
  • each rib 22 for the counterclockwise rotation and the other half length for the clockwise direction by dividing each rib into two halfribs (or half-spokes), i.e. a front one 22 and a rear one 22a, by means of a separating central wall 24.
  • Both half-ribs are aligned each other along the same generating line of the cylinder forming the drum and have therefore the associated opening 23 with the member 21 defining the same directed to opposite sides from the central axis of the rib, and the holes 25 also positioned at opposite sides, symmetrically with respect to those of the other half-rib. This is clearly shown in Fig. 2a with reference to the lower rib 22, 22a, when compared with Fig. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Claims (1)

1. Machine à laver comprenant un tambour perforé (20) qui tourne alternativement dans des sens opposés, à l'intérieur d'une cuve de lavage (10), ensemble autour d'un même axe horizontal (X-X), ledit tambour étant doté de côtes internes de brassage sensiblement radiales (22, 22', 22") qui s'étendent longitudinalement et parallèlement audit axe (X-X), comprenant également des moyens (21) faisant saillie depuis la surface extérieure du tambour (20) et en mesure de plonger dans la partie inférieure d'une zone d'intervalle (15) entre la cuve (10) et le tambour (20), et d'en retirer, pendant la rotation du tambour dans un sens, une quantité d'eau donnée, des moyens (22) pour contenir cette eau pendant une partie de la révolution du tambour puis pour la déverser de nouveau vers le bas, à l'intérieur du tambour (20), dans laquelle lesdits moyens (22) pour contenir puis déverser le liquide de lavage sont formés par les côtes de brassage (22, 22', 22") elles-mêmes, qui sont creuses avec une ouverture (23) à la périphérie du tambour (20), avec des orifices de déversement (25) uniquement dans la partie de la pointe de la côte orientée vers l'intérieur du tambour et dans la partie de la paroi de la côte qui est en amont dans ledit sens de rotation du tambour, et dans laquelle la largeur de l'intervalle (15) entre ladite cuve et ledit tambour de lavage est dans la plage de 12 à 15 mm, sur la partie avant dudit tambour, caractérisée en ce que le creux interne desdites côtes est divisé en deux portions longitudinales, dont chacune (22, 22a; 22', 22'a; 22", 22"a) a une ouverture (23) qui lui est associée sur les faces opposées de la côte, avec une bouche (21) inclinée dans des sens opposés, à chaque fois dans le sens de rotation du tambour qui est adapté pour effectuer une action dynamique sur la demie côte qui s'y apporte, les orifices de sortie (25) étant également placés sur les faces opposées, symétriquement par rapport à la ligne centrale de la côte, afin d'y permettre le stockage d'une certaine quantité d'eau, avant que cette eau ne soit déversée, par l'intermédiaire desdits orifices (25), en fonction du sens de rotation correspondant du tambour (20).
EP87830069A 1986-02-28 1987-02-27 Machine à laver ayant une consommation électrique réduite Expired - Lifetime EP0236282B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19596/86A IT1190075B (it) 1986-02-28 1986-02-28 Macchina lavabiancheria perfezionata a ridotto consumo energetico
IT1959686 1986-02-28

Publications (3)

Publication Number Publication Date
EP0236282A1 EP0236282A1 (fr) 1987-09-09
EP0236282B1 EP0236282B1 (fr) 1990-07-18
EP0236282B2 true EP0236282B2 (fr) 1993-09-01

Family

ID=11159338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87830069A Expired - Lifetime EP0236282B2 (fr) 1986-02-28 1987-02-27 Machine à laver ayant une consommation électrique réduite

Country Status (4)

Country Link
EP (1) EP0236282B2 (fr)
DE (1) DE3763702D1 (fr)
ES (1) ES2016653T5 (fr)
IT (1) IT1190075B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712118A1 (de) * 1986-05-06 1987-11-12 Bosch Siemens Hausgeraete Trommelwaschmaschine
DE3631724A1 (de) * 1986-09-18 1988-03-31 Licentia Gmbh Programmgesteuerte waschmaschine
US11459692B2 (en) 2019-01-31 2022-10-04 Ecolab Usa Inc. Laundry machine kit to enable control of water levels, recirculation, and spray of chemistry
EP3918126B1 (fr) 2019-01-31 2024-05-15 Ecolab USA Inc. Système de réutilisation d'eau de rinçage et procédés d'utilisation
WO2020160429A1 (fr) 2019-01-31 2020-08-06 Ecolab Usa Inc. Dispositif de commande dun système de réutilisation d'eau de rinçage et procédés d'utilisation
ES2981887T3 (es) 2019-01-31 2024-10-11 Ecolab Usa Inc Control de los niveles de agua y de la concentración de detergente en un ciclo de lavado

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR377638A (fr) * 1907-02-16 1907-09-11 Elisabeth Beckmann Machine à laver à tambour avec dispositif de puisage et d'aspiration alternatifs, à chaque rotation, dans les deux sens
GB191001215A (en) * 1910-01-17 1910-09-15 Lorenzo Reginald English Improvements in Washing Machines.
FR1299679A (fr) * 1961-06-15 1962-07-27 Dispositif pour la circulation des bains dans les appareils de lavage, de blanchiment, de rinçage et autres appareils analogues
FR2243289B1 (fr) * 1973-09-12 1976-05-14 Amiens Const Elect Mec

Also Published As

Publication number Publication date
IT8619596A1 (it) 1987-08-28
IT1190075B (it) 1988-02-10
IT8619596A0 (it) 1986-02-28
ES2016653T5 (es) 1995-08-01
EP0236282B1 (fr) 1990-07-18
DE3763702D1 (de) 1990-08-23
ES2016653B3 (es) 1990-11-16
EP0236282A1 (fr) 1987-09-09

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