EP0236282B1 - Waschmaschine mit verminderter Leistungsaufnahme - Google Patents

Waschmaschine mit verminderter Leistungsaufnahme Download PDF

Info

Publication number
EP0236282B1
EP0236282B1 EP87830069A EP87830069A EP0236282B1 EP 0236282 B1 EP0236282 B1 EP 0236282B1 EP 87830069 A EP87830069 A EP 87830069A EP 87830069 A EP87830069 A EP 87830069A EP 0236282 B1 EP0236282 B1 EP 0236282B1
Authority
EP
European Patent Office
Prior art keywords
drum
washing
rib
water
tank
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
Other languages
English (en)
French (fr)
Other versions
EP0236282A1 (de
EP0236282B2 (de
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11159338&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0236282(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Smeg SpA filed Critical Smeg SpA
Publication of EP0236282A1 publication Critical patent/EP0236282A1/de
Publication of EP0236282B1 publication Critical patent/EP0236282B1/de
Application granted granted Critical
Publication of EP0236282B2 publication Critical patent/EP0236282B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 1 299 679 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.
  • the present invention has the purpose of attaining the above-mentioned advantages relating to the economic effects of a reduced volume of water without resorting to the application of a container-boiler and associate circulating pump, i.e. without introducing elements which can increase the machine complexity and thereby its costs as well as the risk of failures.
  • a container-boiler and associate circulating pump i.e. without introducing elements which can increase the machine complexity and thereby its costs as well as the risk of failures.
  • an arrangement with perforated ribs and collecting elements according to the characterizing portion of claim 1 has been devised, having a stronger washing effect than the solution according to FR-A 1 299 679.
  • the diameter of the washing tank is so reduced that the resulting gap between tank and drum lies in the range of 12-15 mm at the front portion of the drum, the water used for washing is substantially what is contained in the drum itself, which is sufficient for a satisfactory washing action according to the invention, even with a reduced water feed, as the water volume in the gap is lower.
  • the heating resistors these latter can be housed in a recess suitably formed in the lower portion of the washing tank.
  • 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 provide 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 which 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 has a reduced size in comparison with the known tanks, thus reducing at the same time the size of gap 15 between drum 20 and inner wall of the washing tank 10.
  • 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 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 present invention provides that the quantity of water for washing is less than what is usually adopted, in order to benefit of the power saving advantages as set forth above.
  • the water level I reached within the drum should be however sufficient for washing, and it has been found that a water consumption could be had, lower even by one third with respect to the conventional water demand. Therefore an average volume of 12 liters of water with detergent can be reduced to about 8 liters for washing machines having a load capacity of 5 kg.
  • the present invention provides therefor as follows. To this aim 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 powred 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, 22E; 22 F 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)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Claims (3)

1. Waschmaschine, mit einer durchlöcherten Trommel (20), die im Inneren eines Waschbehälters (10) abwechselnd in entgegengesetzten Richtungen, koaxial um ihre horizontale Achse (X-X) rotiert, wobei die Trommel mit innenliegenden, im wesentlichen radialen Mitschlepprippen (22, 22', 22") versehen ist, die sich in Längsrichtung und parallel zu der Achse (X-X) erstrecken, weiterhin mit Mitteln (21), die von der Außenfläche der Trommel (20) hervorragen und geeignet sind, in den unteren Bereich einer Spaltzone (15) zwischen Behälter (10) und Trommel (20) einzutauchen und von dort während der Rotation der Trommel in einer Richtung eine bestimmte Wassermenge mitzunehmen, Mitteln (22) zum Halten derselben während eines Bruchteils einer Drehung der Trommel und zu deren nachfolgenden Wiederabgeben nach unten in das Innere der Trommel (20), wobei die Mittel (22) zum Halten und nachfolgenden Wiederabgeben der Waschflüssigkeit aus den Mitschlepprippen (22, 22', 22") selbst ausgebildet sind, die hohl mit einer Öffnung (23) am Umfang der Trommel (20) ausgeführt sind, gekennzeichnet durch Abgabebohrungen (25), die nur in dem Bereich des Rippenscheitels, der nach innen in die Trommel gerichtet ist, und der Rippenwand vorgesehen sind, die sich stromauf in der einen Drehrichtung der Trommel befindet, und dadurch, daß die Breite des Spaltes (15) zwischen dem Behälter und der Waschtrommel im Bereich von 12 bis 15 mm am vorderen Teil der Trommel liegt.
2. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Behälter (10) an seinem unteren, das Waschwasser enthaltenden Bereich eine Vertiefung (14) zum Aufnehmen eines Heizwiderstandes (16) aufweist.
3. Waschmaschine nach Anspruch 2, dadurch gekennzeichnet, daß der Innenhohlraum der Rippen in zwei Längsabschnitte geteilt ist, von denen jeder (22, 22a; 22', 22'a; 22", 22"a) eine zugehörige Öffnung (23) an entgegengesetzten Seiten der Rippe mit je einem Mündungselement (21) aufweist, welche in entgegengesetzten Richtungen geneigt sind, jeweils in der Drehrichtung der Trommel, um eine dynamische Wirkung auf die betreffende Rippenhälfte auszuüben, wobei die Auslaßbohrungen (25) ebenfalls an entgegengesetzten Seiten symmetrisch zur Mittellinie der Rippe angeordnet sind, um für etwas Wasserspeicherung darin vor dessen Ausfluß durch die Bohrungen (25) gemäß der entsprechenden Drehrichtung der Trommel (20) zu sorgen.
EP87830069A 1986-02-28 1987-02-27 Waschmaschine mit verminderter Leistungsaufnahme Expired - Lifetime EP0236282B2 (de)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=11159338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87830069A Expired - Lifetime EP0236282B2 (de) 1986-02-28 1987-02-27 Waschmaschine mit verminderter Leistungsaufnahme

Country Status (4)

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

Families Citing this family (5)

* 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
EP4379116A2 (de) 2019-01-31 2024-06-05 Ecolab USA Inc. Regulierung des wasserstandes und der waschmittelkonzentration in einem waschzyklus
WO2020160429A1 (en) 2019-01-31 2020-08-06 Ecolab Usa Inc. Controller for a rinse water reuse system and methods of use
EP3918128A1 (de) 2019-01-31 2021-12-08 Ecolab USA Inc. Waschmaschinenkit zur steuerung von wasserpegeln, rezirkulation und sprühen von chemikalien

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 (de) * 1973-09-12 1976-05-14 Amiens Const Elect Mec

Also Published As

Publication number Publication date
DE3763702D1 (de) 1990-08-23
IT1190075B (it) 1988-02-10
ES2016653T5 (es) 1995-08-01
ES2016653B3 (es) 1990-11-16
EP0236282A1 (de) 1987-09-09
IT8619596A1 (it) 1987-08-28
IT8619596A0 (it) 1986-02-28
EP0236282B2 (de) 1993-09-01

Similar Documents

Publication Publication Date Title
EP1464750B1 (de) Dampfstrahlwaschmaschine
US6279357B1 (en) Washer dryer
EP2735635B1 (de) Waschmaschine und verfahren zum zuführen von waschwasser für eine waschmaschine
EP1500736B1 (de) Waschmaschine
CA1182300A (en) Liquid pumping agitator with barrel valve for automatic washers
KR0158263B1 (ko) 이중펄세이터를 갖는 세탁기
EP0236282B1 (de) Waschmaschine mit verminderter Leistungsaufnahme
US7082793B2 (en) Drum-type washing machine having a laundry drum which can be loaded from the front
CN1950559B (zh) 洗衣机及其洗衣方法
CN112726140B (zh) 喷淋盖及衣物处理装置
CN216129820U (zh) 一种滚筒洗衣机用内筒及滚筒洗衣机
JP6311125B2 (ja) 洗濯機
JP2019097866A (ja) ドラム式洗濯機
KR200160338Y1 (ko) 직결식 세탁기의 보푸라기 채집장치
JPH09285679A (ja) 洗濯機
KR0132106Y1 (ko) 탈수헹굼 기능을 갖는 2조식세탁기의 탈수측유로
KR100287322B1 (ko) 드럼식 세탁기의 공기방울 발생장치
JP3146846B2 (ja) 洗濯機
KR0132547Y1 (ko) 여과기능을 갖는 탈수내커버가 취부된 2조식세탁기
KR0132107Y1 (ko) 유로가 형성된 탈수내커버가 취부된 2조식 세탁기
KR920003550Y1 (ko) 자동세탁기의 개량세탁봉
RU2051248C1 (ru) Стиральная машина
KR20000039119A (ko) 세탁조 날개를 구비한 드럼 세탁기
KR0130344Y1 (ko) 세탁기용 급수내커버
KR200244391Y1 (ko) 드럼식세탁기의공기방울발생장치

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BERTAZZONI, ROBERTO

17P Request for examination filed

Effective date: 19871221

17Q First examination report despatched

Effective date: 19890125

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB

REF Corresponds to:

Ref document number: 3763702

Country of ref document: DE

Date of ref document: 19900823

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: MIELE & CIE. GMBH & CO

Effective date: 19910416

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19930901

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): DE ES FR GB

ET3 Fr: translation filed ** decision concerning opposition
REG Reference to a national code

Ref country code: ES

Ref legal event code: DC2A

Kind code of ref document: T5

Effective date: 19950801

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20010209

Year of fee payment: 15

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020104

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020226

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020416

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030902

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030228