EP1529867A2 - Trommelwaschmaschine - Google Patents

Trommelwaschmaschine Download PDF

Info

Publication number
EP1529867A2
EP1529867A2 EP04253995A EP04253995A EP1529867A2 EP 1529867 A2 EP1529867 A2 EP 1529867A2 EP 04253995 A EP04253995 A EP 04253995A EP 04253995 A EP04253995 A EP 04253995A EP 1529867 A2 EP1529867 A2 EP 1529867A2
Authority
EP
European Patent Office
Prior art keywords
lifter
washing machine
drum type
type washing
rotatable tub
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Withdrawn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
EP04253995A
Other languages
English (en)
French (fr)
Inventor
Hyun Sook No. 135-1703 Hwanggolmaeul Apt. Kim
Hyoung Hoon No 201-104 DongSuwon-LG Roh
Koan Seog No. 210-1403 HyunDai 2nd APT Namkung
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1529867A2 publication Critical patent/EP1529867A2/de
Withdrawn legal-status Critical Current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
    • 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
    • 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

Definitions

  • the present invention relates to a drum type washing machine, and more particularly, but not exclusively to a drum type washing machine in which axially-extending lifters arranged around an inner peripheral surface of a rotatable tub upwardly inclinedly installed to allow easy laundry loading and unloading operations have an improved structure, thereby being capable of achieving an improvement in wash performance.
  • a conventional washing machine generally includes a housing forming an outer appearance of the washing machine, a cylindrical water tub installed in the housing and adapted to contain wash water, a cylindrical rotatable tub rotatably installed in the water tub and adapted to wash laundry contained therein, a drive motor arranged in the rear of the water tub and adapted to rotate the rotatable tub, and a door hingably mounted to a front wall of the housing.
  • Various lifters are protruded from an inner peripheral surface of the rotatable tub to a desired height while being arranged to be circumferentially spaced apart from one another around the rotatable tub and to extend axially along the inner peripheral surface of the rotatable tub.
  • Openings are provided at respective front ends of the water tub and rotatable tub such that they are opened and closed by the door.
  • the door When the door is open, it is possible to put laundry into the rotatable tub through the openings or to take the laundry out of the rotatable tub through the openings.
  • the door When the door is closed, the water tub and rotatable tub are sealed against the outside of the door. In this state, a wash cycle can be carried out.
  • drum type washing machines In order to eliminate or at least address such inconvenience, improved drum type washing machines have recently been developed.
  • the rotatable tub is upwardly inclined such that the opening thereof is upwardly directed, so that the user can perform loading and unloading of laundry without bending his body too much.
  • the laundry not lifted by the lifters at the rear end portion of the rotatable tub may be entangled as the lifters are rotated along with the rotatable tub. As a result, the laundry may be damaged. There is also inconvenience in that the user must disentangle the entangled laundry after completion of the washing process. Meanwhile, the laundry distributed in a relatively small amount at the front end portion of the rotatable tub is easily lifted by the lifters, and then moved toward the rear end portion of the rotatable tub. As a result, the laundry tends to bunch up at the rear end portion of the rotatable tub even more.
  • each lifter Since the front end portion of each lifter is rotated at a level higher than that of the rear end portion of the lifter, because the rotatable tub is upwardly inclined toward the front wall of the housing, wash water raised by the lifter flows toward the rear end portion of the lifter. For this reason, the wash water is mainly sprayed by the rear end portions of the lifters, while little wash water is sprayed by the front end portions of the lifters. As a result, the laundry positioned at the front end portion of the rotatable tub is insufficiently doused with the wash water.
  • Embodiments of the present invention address the problems involved with the above mentioned conventional drum type washing machine.
  • Embodiments of the invention aim to provide a drum type washing machine in which axially-extending lifters arranged around an inner peripheral surface of a rotatable tub which is upwardly inclined have an improved structure, thereby achieving an improvement in wash performance.
  • a drum type washing machine including: a housing; a rotatable tub rotatably positioned in the housing; and at least one lifter positioned on an inner peripheral surface of the rotatable tub and extending axially along the rotatable tub, the lifter having, at a rear end portion thereof, a width larger than that at a front end portion of the lifter.
  • a drum type washing machine comprising: a housing; a rotatable tub rotatably positioned in the housing and upwardly inclined toward a front wall of the housing at an inclination angle; a drive motor arranged in a rear of the rotatable tub, adapted to rotate the rotatable tub; and at least one lifter on an inner peripheral surface of the rotatable tub extending axially along the rotatable tub, wherein the rotatable tub has, at the rear thereof, an inner peripheral surface area, on which laundry is positioned, smaller than that at a front thereof.
  • the rotatable tub may be upwardly inclined toward a front wall of the housing.
  • the lifter may have a width gradually reducing as it extends from the rear end thereof to the front end of the lifter.
  • the lifter may include, at a top portion thereof, water spray holes for downwardly spraying wash water raised by the lifter.
  • the water spray holes may be longitudinally arranged in rows at the top portion of the lifter. Corresponding water spray holes in respective rows may be laterally aligned.
  • the lifter may include, at a front end thereof, with a width-enlarged portion.
  • the width-enlarged portion may have water spray holes so that a relatively large amount of wash water may be sprayed at the front end of the lifter, which is arranged at a relatively high level.
  • FIG. 1 is a sectional view schematically illustrating the configuration of a drum type washing machine according to the present invention.
  • the drum type washing machine according to the present invention includes a housing 1 having an approximately box shape to define an outer appearance of the washing machine, a drum-shaped water tub 2 installed in the housing 1 and adapted to contain wash water, a drum-shaped rotatable tub 3 rotatably positioned in the water tub 2 and including spin-dry holes 4 at a peripheral wall of the rotatable tub, and a drive motor 5 adapted to rotate the rotatable tub 3, in order to wash and spin-dry laundry contained in the rotatable tub 3.
  • Openings 2a and 3a are provided at respective front ends of the water tub 2 and rotatable tub 3, in order to allow laundry to be put into the rotatable tub 3 and to be taken out of the rotatable tub 3.
  • a door 6 is hingably mounted to a front wall of the housing 1, so as to open and close the openings 2a and 3a of the water tub 2 and rotatable tub 3.
  • a water supply pipe 7 for receiving wash water from an external water supply source, and a detergent container 8 for containing detergent, and mixing the detergent with the wash water supplied via the water supply pipe 7.
  • a drain pump 9 and a drain hose 10 are installed at the bottom of the housing 1, in order to externally drain wash water after completion of a wash cycle.
  • the drive motor 5 is fixedly mounted to a rear end of the water tub 2 outside the water tub 2.
  • a rotatable shaft 5a which is connected to the drive motor 5 at one end thereof, is fixedly coupled to a rear end of the rotatable tub 3 at the other end of the rotatable shaft, so that it transmits a rotating force from the drive motor 5 to the rotatable tub 3, thereby causing the rotatable tub 3 to rotate.
  • the rotatable tub 3 is upwardly inclined at a certain angle toward the front wall of the housing 1, in order to allow the user to perform loading and unloading of laundry without bending his body excessively Similar to the rotatable tub 3, the water tub 2 is upwardly inclined at a certain angle toward the front wall of the housing 1, while being suspended in the housing 1.
  • the inclination angle ⁇ of the rotatable tub 3 be as large as possible, in order to conveniently perform loading and unloading of laundry in front of the housing 1.
  • the inclination angle ⁇ is excessively large, the amount of laundry positioned at a rear end portion of the rotatable tub 3 increases excessively, so that a degradation in wash performance occurs.
  • Lifters 20 are arranged on an inner peripheral surface of the rotatable tub 3 such that they are circumferentially uniformly spaced apart from one another around the rotatable tub 3 while extending axially along the rotatable tub 3. As the rotatable tub 3 rotates, the lifters 20 raise laundry contained in the rotatable tub 3, along with wash water, and then release the raised laundry and wash water at a certain level, thereby causing the laundry and wash water to be dropped. Thus, the laundry is washed.
  • the lifters 20 In order to prevent the laundry contained in the rotatable tub 3 from bunching up at the rear end portion of the rotatable tub 3, as compared to the front end portion of the rotatable tub 3, due to the upward inclination of the rotatable tub 3 toward the front wall of the housing 1, the lifters 20 have a width gradually reducing as they extend from the rear end of the rotatable tub 3 to the front end thereof. Such a structure of the lifters 20 will be described hereinafter, with reference to FIGS. 2 and 3.
  • FIG. 2 is a perspective view of the rotatable tub, in which lifters having opposite planar side surfaces and a width gradually reducing in a forward direction in accordance with a first embodiment of the present invention are arranged on the inner peripheral surface of the rotatable tub.
  • the lifters are designated by the reference numeral 20.
  • the lifters 20 are arranged on the inner peripheral surface of the rotatable tub 3 such that they are circumferentially uniformly spaced apart from one another around the rotatable tub 3 while extending axially from the rear end of the rotatable tub 3 to the front end thereof, that is, throughout the length of the rotatable tub 3, in order to upwardly lift laundry contained in the rotatable tub 3.
  • Each lifter 20 has a constant height throughout the length of the rotatable tub 3 while having, at a rear end thereof, a larger width than that at a front end of the rotatable tub. Each lifter 20 has a width gradually reducing as it extends from the rear end of the tub to the front end thereof. Each lifter 20 also has opposite planar side surfaces.
  • each lifter 20 corresponds to the rear end of the rotatable tub 3 adjacent to the rear wall of the housing 1, whereas the front end of each lifter 20 corresponds to the front end of the rotatable tub 3 adjacent to the door 6.
  • the lifters 20 each have, at the rear end thereof, a relatively larger width than at the front end thereof, the amount of laundry positioned at the rear end portion of the rotatable tub 3 is correspondingly reduced, so that the laundry not positioned at the rear end portion of the rotatable tub 3 is positioned at the front end portion of the rotatable tub 3 where the lifters 20 have a smaller width. Accordingly, it is possible to prevent laundry from bunching up only at the rear end portion of the rotatable tub 3.
  • laundry can be uniformly distributed in the rotatable tub 3. That is, although the rotatable tub 3 has an upwardly inclined structure, the laundry contained in the rotatable tub 3 is uniformly distributed throughout the length of the rotatable tub 3.
  • the area where the laundry is positioned between adjacent lifters 20 has a height at the rear end portion of the rotatable tub 3 larger than that at the front end portion of the rotatable tub 3 so that the laundry is uniformly distributed throughout the length of the rotatable tub 3. Accordingly, it is possible to rapidly and effectively wash the laundry. Also, the rotatable tub 3 can rotate in a dynamically stable state.
  • the lifters 20 each have a width gradually reducing as it extends from the rear end thereof to the front end thereof, they push the laundry from the rear end of the rotatable tub 3 to the front end thereof, as the tub rotates. Accordingly, the laundry positioned at the front end is prevented from shifting toward the rear end portion of the rotatable tub 3 at a level lower than the front end portion of the rotatable tub 3.
  • Each lifter 20 also has a structure to spray wash water. That is, each lifter 20 has a downwardly-opened hollow structure for receiving wash water in its interior. Further, water spray holes 23 are provided at a top portion 21 of each lifter 20. Each lifter 20 is also opened at a bottom portion 22 to communicate with openings (not shown) formed at a portion of the rotatable tub 3 where the lifter 20 is arranged. Accordingly, wash water is introduced into each lifter 20 via the opened bottom portion 22 at the bottom side of the rotatable tub 3, and then downwardly sprayed through the water spray holes 23 at the top side of the rotatable tub 3. Thus, the wash water, which is mixed with detergent, can effectively permeate into the laundry, so that the laundry can be more rapidly washed. Although not shown in the drawings, spray holes may also be provided at the opposite side portions of each lifter 20, so as to laterally spray wash water.
  • each lifter 20 contacts the inner peripheral surface of the rotatable tub 3, whereas the top portion 21 of each lifter 20 is spaced apart from the inner peripheral surface of the rotatable tub 3 by a maximum distance.
  • each lifter 20 The water spray holes 23 of each lifter 20 are longitudinally arranged in rows. Corresponding water spray holes 23 in respective rows are laterally aligned.
  • Each lifter 20 has a width-enlarged portion 24 at the front end of the lifter, in order to spray a sufficient amount of wash water at the front end portion of the rotatable tub 3 at a relatively high level.
  • the width-enlarged portion 24 has a length much smaller than the overall length of the lifter 20, in order to prevent a reduction in the effect obtained by the structure of the lifter 20 having a width gradually reducing as it extends from the rear end of the rotatable tub 3 to the front end thereof.
  • the width-enlarged portion 24 has, at a front end thereof corresponding to the front end of the lifter 20, a width approximately equal to the width of the rear end of the lifter 20, that is, the largest width of the lifter 20.
  • the wash water introduced into each lifter 20 through its bottom portion 22 at the bottom side of the rotatable tub 3 can be uniformly sprayed through the water spray holes 23 throughout the length of the lifter 20.
  • the laundry uniformly distributed between the rear and front ends of the rotatable tub 3 can be effectively doused by the wash water, which is mixed with detergent.
  • the user opens the door 6, and puts laundry into the rotatable tub 3 which is upwardly inclined. At this time, the user can conveniently perform these operations without lowering his posture. Since the area between adjacent lifters 20 at the rear end portion of the rotatable tub 3 is smaller than that at the front end portion of the rotatable tub 3, the laundry contained in the rotatable tub 3 is uniformly distributed throughout the length of the rotatable tub 3.
  • wash water mixed with detergent is introduced into the water tub 2 via the water supply pipe 7 and detergent container 8, so that it fills a lower portion of the water tub 2.
  • the water supply cycle is completed.
  • the drive motor 5 alternatingly rotates the rotatable tub 3 in clockwise and counterclockwise directions, along with the rotatable shaft 5a.
  • the laundry contained in the rotatable tub 3 is washed.
  • the rotatable tub 3 rotates in such a wash cycle, the laundry is uniformly distributed throughout the length of each lifter 20, so that the load applied to the lifter 20 is uniform throughout the length of the lifter 20. Accordingly, the laundry can be effectively washed. Also, the rotatable tub 3 is maintained in a dynamically balanced state, so that it can be stably rotated.
  • the laundry is released from the lifters 20, and then dropped, so that it is washed.
  • the wash water mixed with detergent is introduced into each lifter 20 through its bottom portion 22 at the bottom side of the rotatable tub 3, and then downwardly sprayed through the water spray holes 23 provided at the top portion of the lifter 20, so that the wash water permeates into the laundry.
  • width-enlarged portion 24 having a relatively large number of water spray holes 23 is provided at the front end of each lifter 20, it is possible to spray a sufficient amount of wash water even at the front end portion of the lifter 20 arranged at a relatively high level.
  • the laundry After completion of the wash cycle, the laundry is rinsed and spin-dried through rinse and spin-dry cycles. Thus, washing of the laundry is completed.
  • the user After completion of the washing of the laundry, the user again opens the door 6, and takes the laundry out of the rotatable tub 3. At this time, the user can conveniently perform these operations without lowering his posture too much because the rotatable tub 3 is upwardly inclined.
  • FIG. 3 is a perspective view of the rotatable tub, in which lifters having opposite curved side surfaces and a width gradually reducing in a forward direction in accordance with a second embodiment of the present invention are arranged on the inner peripheral surface of the rotatable tub.
  • the lifters are designated by reference numeral 20a.
  • the lifters 20a according to the second embodiment have the same structure as those of the first embodiment, except that their opposite side surfaces are curved, so that they have a similar function and effect as that of the lifters 20 according to the first embodiment.
  • the lifters 20a provide an improvement because their curved surfaces feel soft and smooth.
  • a rotatable tub is upwardly inclined toward the front wall of the housing.
  • each lifter has a width gradually reducing as it extends from its rear end to its front end. Accordingly, laundry contained in the rotatable tub can be uniformly distributed throughout the length of the lifter. Thus, it is possible to rapidly and effectively carry out a wash process.
  • the laundry can be stably lifted by the lifters. Accordingly, the rotatable tub can be rotated in a dynamically stable state.
  • the laundry is not entangled or lumped. Accordingly, the rotatable tub is rotated in a balanced state during a spin-dry process. It is also unnecessary to disentangle the washed laundry.
  • each lifter includes, at its front end, a width-enlarged portion, in order to provide a sufficient number of water spray holes at the front end of the lifter. Accordingly, wash water mixed with detergent can be sufficiently sprayed even at the front end portion of each lifter, so that even the laundry positioned at the front end portion of the rotatable tub arranged at a relatively high level can be rapidly and effectively washed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP04253995A 2003-11-10 2004-07-02 Trommelwaschmaschine Withdrawn EP1529867A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020030079249A KR20050045256A (ko) 2003-11-10 2003-11-10 드럼세탁기
KR2003079249 2003-11-10

Publications (1)

Publication Number Publication Date
EP1529867A2 true EP1529867A2 (de) 2005-05-11

Family

ID=34431747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04253995A Withdrawn EP1529867A2 (de) 2003-11-10 2004-07-02 Trommelwaschmaschine

Country Status (5)

Country Link
US (1) US20050097926A1 (de)
EP (1) EP1529867A2 (de)
JP (1) JP2005137887A (de)
KR (1) KR20050045256A (de)
CN (1) CN1616747A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042992A1 (de) * 2015-01-06 2016-07-13 V-Zug AG Waschmaschine mit unwuchtkompensation

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
EP1545507A4 (de) * 2002-07-17 2009-04-22 Arqule Inc Aktiverte checkpunkt-therapie und anwendungsverfahren daf r
US20090276966A1 (en) * 2006-07-06 2009-11-12 Bsh Bosch Und Siemens Hausgerate Gmbh Washing machine with hollow agitators
KR101356647B1 (ko) * 2007-03-16 2014-02-03 삼성전자주식회사 드럼세탁기
DE602007012438D1 (de) * 2007-09-21 2011-03-24 Whirlpool Co Von vorn beschickbare Waschmaschine mit hydrodynamischem Mitnehmer
US8713977B2 (en) 2010-12-08 2014-05-06 Whirlpool Corporation Laundry treating appliance with balancing system
US8695383B2 (en) 2010-12-08 2014-04-15 Whirlpool Corporation Laundry treating appliance with balancing system
US8701451B2 (en) 2010-12-08 2014-04-22 Whirlpool Corporation Laundry treating appliance with balancing system
US9003838B2 (en) 2010-12-08 2015-04-14 Whirlpool Corporation Laundry treating appliance with balancing system
US8991223B2 (en) 2010-12-08 2015-03-31 Whirlpool Corporation Laundry treating appliance with balancing system
EP2765234B1 (de) * 2013-02-07 2017-08-23 Whirpool Corporation Haushaltswäschetrockner und verfahren zum antrieb des trockners
WO2016144758A1 (en) * 2015-03-06 2016-09-15 Hg LAUNDRY SYSTEMS, LLC Washing machine with positive pressure moisture extraction
CN107893261A (zh) * 2017-12-21 2018-04-10 徐州腾宇羽绒制品设备有限公司 倾斜洗毛机
CN110195314B (zh) 2018-02-27 2021-10-01 青岛胶南海尔洗衣机有限公司 一种内筒及免清洗洗衣机
CN109680457A (zh) * 2019-01-17 2019-04-26 张欢 一种洗衣机及其洗涤桶
AU2020294757A1 (en) 2019-06-21 2022-01-27 Electrolux Appliances Aktiebolag Laundry treating appliance
AU2019475326A1 (en) * 2019-11-18 2022-04-21 Electrolux Appliances Aktiebolag Laundry washing machine with improved washing performances

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971449A (en) * 1989-12-19 1990-11-20 American Laundry Machinery Inc. Drum type agitating and mixing machine
DE19859571A1 (de) * 1998-12-22 2000-06-29 Bsh Bosch Siemens Hausgeraete Wäschetrommel
JP3772821B2 (ja) * 2001-10-23 2006-05-10 エルジー電子株式会社 洗濯機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042992A1 (de) * 2015-01-06 2016-07-13 V-Zug AG Waschmaschine mit unwuchtkompensation

Also Published As

Publication number Publication date
CN1616747A (zh) 2005-05-18
JP2005137887A (ja) 2005-06-02
US20050097926A1 (en) 2005-05-12
KR20050045256A (ko) 2005-05-17

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