EP2920350A1 - Washing machine having a flap at the tub drain hose - Google Patents

Washing machine having a flap at the tub drain hose

Info

Publication number
EP2920350A1
EP2920350A1 EP13791767.0A EP13791767A EP2920350A1 EP 2920350 A1 EP2920350 A1 EP 2920350A1 EP 13791767 A EP13791767 A EP 13791767A EP 2920350 A1 EP2920350 A1 EP 2920350A1
Authority
EP
European Patent Office
Prior art keywords
flap
tub
washing machine
drain hose
tub drain
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.)
Granted
Application number
EP13791767.0A
Other languages
German (de)
French (fr)
Other versions
EP2920350B1 (en
Inventor
Ferudun Arabaci
Turhan Mutlu
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2920350A1 publication Critical patent/EP2920350A1/en
Application granted granted Critical
Publication of EP2920350B1 publication Critical patent/EP2920350B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/086—Arrangements for avoiding detergent wastage in the discharge conduit

Definitions

  • the present invention relates to a washing machine comprising a tub in which washing takes place, a tub drain outlet draining water out of the tub after washing, a tub drain hose having an inner wall in connection with the tub drain outlet, and a circular flap disposed in the tub drain hose.
  • Washing machines are equipped with a tub drain outlet for draining away laundry water from the tub following a washing cycle, as well as a tub drain hose in connection with the tub drain outlet and a drain pump.
  • a clearance in the tub drain outlet causes the detergent taken from the detergent box prior to washing to leave the tub together with some amount of water, and to flow into the tub drain hose. This, in turn, diminishes the washing performance of the respective washing machine.
  • GB21741 10 describes a valve device disposed in a tube discharge hose of a washing machine.
  • the valve device is made from a resilient clack valve, which is held in a closed state by means of the hydrostatic water pressure in the discharge hose when a drain pump disposed therein is not in operation.
  • DE102010042038 describes a floating body disposed in a connection part of a water drain system to a tub in a washing machine.
  • the washing machine comprises a water tub having a drain opening which is closed by the floating body.
  • a liquid outlet system comprises an outlet line and a drain hose, wherein the liquid outlet system is connected to the water tub.
  • a chamber has a freely floating lifting body as a closing part. Additionally, an annular elastic sealing lip is arranged on an inner wall of the chamber of the drain hose.
  • the object of the present invention is to provide a washing machine equipped with a flap at a tub outlet thereof preventing detergent from flowing out of the tub of the machine.
  • the present invention provides a washing machine comprising a tub in which washing takes place, a tub drain outlet draining water out of the tub after washing, a tub drain hose with an inner wall in connection with the tub drain outlet, and a circular flap disposed in the tub drain hose.
  • the flap comprises at least one first wing and at least one second wing disposed at an obtuse angle to each other, and the flap is connected to the tub drain hose so that the flap is partially movable about an assembly axis defined by a folding line joining together the first wing and the second wing.
  • a clearance is provided between the first wing and the inner wall to allow water to flow when the water from the tub exerts pressure to the flap. The buoyancy of water in the tub drain hose, in turn, brings back the flap to equilibrium.
  • the flap comprises two tabs disposed at the two opposite ends of the folding line so as to be mounted to the inner wall.
  • the flap is mounted to the inner wall through the tabs only such that the body of the flap can move freely.
  • the tub drain hose comprises two vertical grooves in the inner wall for receiving the tabs. In this way, the flap is mounted to the inner wall.
  • the tub drain hose comprises a peripheral groove disposed along the inner wall at the continuation of the vertical grooves.
  • the flap comprises a sealing member disposed along the wall thereof.
  • the angle between the wings is between 120 and 170 degrees, preferably 150 degrees.
  • the sealing member is a flexible o-ring made of a rubber material in a conical form.
  • a fixation member is provided for covering the vertical grooves.
  • the flap is kept from dislocating from the vertical grooves.
  • Figure 1 is a representative view of a washing machine comprising a flap according to the present invention.
  • Figure 2 is a representative view of the flap according to the present invention in the washing machine.
  • Figure 3a is a representative top view of the flap according to the present invention.
  • Figure 3b is a representative side view of the flap according to the present invention.
  • Figure 3c is a cross-sectional view of a sealing member of the flap according to the present invention.
  • Figure 4 is a representative view of the placement of the flap according to the present invention in a tub drain hose thereof.
  • washing machine comprising a flap at a tub drain hose thereof shall be described illustratively by making reference to annexed figures, only for clarification, without imposing any restrictions thereon.
  • a washing machine comprises a tub (20) in which a drum is disposed (10) in which washing takes place, a tub drain outlet (21 ) draining water out of the tub (20) after washing, a tub drain hose (30) in connection with the tub drain outlet (21 ), as well as a drain pump (40) connected to the tub drain hose (30).
  • a flap (50) made of plastic or a rubber material to be placed into the tub drain hose (30) comprises a body (51 ) comprising a semicircular first wing (51 1 ) and a semicircular second wing (512), which are disposed at an obtuse angle (a) between 120 and 170 degrees with respect to each other.
  • the angle corresponds to 150 degrees.
  • the first wing (51 1 ) and the second wing (512) are monolithic with the straight edges of the semicircles facing each other, wherein the flap (50) has a folding line (514) at which the straight edges come into contact, thereby defining an assembly axis (a).
  • a sealing member (53) is provided on a wall (513) of the body (51 ) which surrounds the wall (513) completely, as illustrated in figures 3a and 3c.
  • the sealing member (53) is in the form of a flexible o-ring made of a rubber material in a conical form.
  • the tub drain hose (30) comprises a hose inlet (31 ) by which the hose is connected to the tube drain (21 ), as well as an inner wall (32) having an annular groove therein.
  • Two opposite vertical grooves (321 ) are made in the inner wall (32) within the periphery of the hose inlet (31 ), said grooves being complementary in form to the tabs (52) disposed on the flap (50).
  • the annular groove (322) is structured so that the tabs (52) on the flap (50) can move horizontally.
  • the tabs (52) of the flap are inserted into the vertical grooves (321 ) disposed in the inner wall (32) of the tub drain hose (30), after which the tabs (52) can be moved horizontally within the annular groove (322).
  • the flap (50) can be turned within the tub drain hose (30).
  • the sealing member (53) of the flap comes in contact with the inner wall (32) of the tub drain hose (30) to provide a sealing contact.
  • the vertical grooves (321 ) are optionally locked by means of a fixation element (not illustrated in the figures).
  • the tub (20) is fed with water and detergent through the detergent drawer.
  • the second wing (512) of the flap (50) raises up by virtue of the monolithic structure of the wings (51 1 , 512) of the flap (50); but since this movement is within the limit of elasticity of the sealing member (53), no clearance is formed between the inner wall (32) of the tub drain hose (30) and the sealing member (53) even if the second wing (512) moves. In this way, no leakage occurs between the second wing (512) and the inner wall (32).
  • the flap (50) can be mounted to the tub drain outlet (21 ) in a similar way as it is mounted to the tub drain hose (30).
  • the mounting of the flap to the tub drain hose (30) is simpler as compared to the tub drain outlet (21 ). After the flap is mounted to the tub drain hose (30), it is secured to the tub drain outlet (21 ) by means of fixation means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

The present invention relates to a washing machine comprising a tub (20) in which washing takes place, a tub drain outlet (21) draining water out of the tub (20) following washing, a tub drain hose (30) having an inner wall (32) in connection with the tub drain outlet (21), and a circular flap (50) disposed in the tub drain hose (30). The novelty of the present invention is that the flap (50) comprises at least one first wing (511) and at least one second wing (512) disposed at an obtuse angle (a) to each other and the flap (50) is connected to the tub drain hose (30) so that the flap (50) is partially movable about an assembly axis (a) defined by a folding line (514) joining together the first wing (511) and the second wing (512).

Description

DESCRIPTION
WASHING MACHINE HAVING A FLAP AT THE TUB DRAIN HOSE The present invention relates to a washing machine comprising a tub in which washing takes place, a tub drain outlet draining water out of the tub after washing, a tub drain hose having an inner wall in connection with the tub drain outlet, and a circular flap disposed in the tub drain hose. Washing machines are equipped with a tub drain outlet for draining away laundry water from the tub following a washing cycle, as well as a tub drain hose in connection with the tub drain outlet and a drain pump. A clearance in the tub drain outlet causes the detergent taken from the detergent box prior to washing to leave the tub together with some amount of water, and to flow into the tub drain hose. This, in turn, diminishes the washing performance of the respective washing machine.
GB21741 10 describes a valve device disposed in a tube discharge hose of a washing machine. The valve device is made from a resilient clack valve, which is held in a closed state by means of the hydrostatic water pressure in the discharge hose when a drain pump disposed therein is not in operation.
DE102010042038 describes a floating body disposed in a connection part of a water drain system to a tub in a washing machine. The washing machine comprises a water tub having a drain opening which is closed by the floating body. A liquid outlet system comprises an outlet line and a drain hose, wherein the liquid outlet system is connected to the water tub. A chamber has a freely floating lifting body as a closing part. Additionally, an annular elastic sealing lip is arranged on an inner wall of the chamber of the drain hose. The object of the present invention is to provide a washing machine equipped with a flap at a tub outlet thereof preventing detergent from flowing out of the tub of the machine. Accordingly, the present invention provides a washing machine comprising a tub in which washing takes place, a tub drain outlet draining water out of the tub after washing, a tub drain hose with an inner wall in connection with the tub drain outlet, and a circular flap disposed in the tub drain hose. Here, the flap comprises at least one first wing and at least one second wing disposed at an obtuse angle to each other, and the flap is connected to the tub drain hose so that the flap is partially movable about an assembly axis defined by a folding line joining together the first wing and the second wing. Additionally, a clearance is provided between the first wing and the inner wall to allow water to flow when the water from the tub exerts pressure to the flap. The buoyancy of water in the tub drain hose, in turn, brings back the flap to equilibrium.
According to a preferred embodiment of the present invention, the flap comprises two tabs disposed at the two opposite ends of the folding line so as to be mounted to the inner wall. Thus, the flap is mounted to the inner wall through the tabs only such that the body of the flap can move freely.
According to another preferred embodiment of the present invention, the tub drain hose comprises two vertical grooves in the inner wall for receiving the tabs. In this way, the flap is mounted to the inner wall.
According to another preferred embodiment of the present invention, the tub drain hose comprises a peripheral groove disposed along the inner wall at the continuation of the vertical grooves. Thus, the flap is kept from dislocating from the vertical grooves under the influence of pressure. According to another preferred embodiment of the present invention, the flap comprises a sealing member disposed along the wall thereof. Thus, detergent is blocked from flowing between the flap and the inner wall. According to another preferred embodiment of the present invention, the angle between the wings is between 120 and 170 degrees, preferably 150 degrees. Thus, any clearance between the flap and the inner wall is prevented when the flap is in equilibrium. According to another preferred embodiment of the present invention, the sealing member is a flexible o-ring made of a rubber material in a conical form. Thus, no clearance takes place between the sealing member and the inner wall while the second wing raises up. According to another preferred embodiment of the present invention, a fixation member is provided for covering the vertical grooves. Thus, the flap is kept from dislocating from the vertical grooves.
Figure 1 is a representative view of a washing machine comprising a flap according to the present invention.
Figure 2 is a representative view of the flap according to the present invention in the washing machine. Figure 3a is a representative top view of the flap according to the present invention.
Figure 3b is a representative side view of the flap according to the present invention.
Figure 3c is a cross-sectional view of a sealing member of the flap according to the present invention. Figure 4 is a representative view of the placement of the flap according to the present invention in a tub drain hose thereof.
In the following detailed description, a washing machine according to the present invention comprising a flap at a tub drain hose thereof shall be described illustratively by making reference to annexed figures, only for clarification, without imposing any restrictions thereon.
According to figures 1 and 2, a washing machine comprises a tub (20) in which a drum is disposed (10) in which washing takes place, a tub drain outlet (21 ) draining water out of the tub (20) after washing, a tub drain hose (30) in connection with the tub drain outlet (21 ), as well as a drain pump (40) connected to the tub drain hose (30).
According to figures 3a and 3b, a flap (50) made of plastic or a rubber material to be placed into the tub drain hose (30) comprises a body (51 ) comprising a semicircular first wing (51 1 ) and a semicircular second wing (512), which are disposed at an obtuse angle (a) between 120 and 170 degrees with respect to each other. According to a preferred embodiment, the angle corresponds to 150 degrees. Referring to figure 3a, the first wing (51 1 ) and the second wing (512) are monolithic with the straight edges of the semicircles facing each other, wherein the flap (50) has a folding line (514) at which the straight edges come into contact, thereby defining an assembly axis (a). One tab (52) projecting outwards is provided on each of the opposite ends of the folding line (514). Additionally, a sealing member (53) is provided on a wall (513) of the body (51 ) which surrounds the wall (513) completely, as illustrated in figures 3a and 3c. According to the cross-section AA' in figure 3c, the sealing member (53) is in the form of a flexible o-ring made of a rubber material in a conical form. In figure 4, the tub drain hose (30) comprises a hose inlet (31 ) by which the hose is connected to the tube drain (21 ), as well as an inner wall (32) having an annular groove therein. Two opposite vertical grooves (321 ) are made in the inner wall (32) within the periphery of the hose inlet (31 ), said grooves being complementary in form to the tabs (52) disposed on the flap (50). At the termination of the vertical groove (321 ), in turn, is provided an annular groove (322) extending throughout the inner wall (32). The annular groove (322) is structured so that the tabs (52) on the flap (50) can move horizontally. In order to mount the flap (50), the tabs (52) of the flap are inserted into the vertical grooves (321 ) disposed in the inner wall (32) of the tub drain hose (30), after which the tabs (52) can be moved horizontally within the annular groove (322). Thus, the flap (50) can be turned within the tub drain hose (30). When the flap (50) is not exposed to water pressure, the sealing member (53) of the flap comes in contact with the inner wall (32) of the tub drain hose (30) to provide a sealing contact. In order to keep the flap (50) within the vertical grooves (321 ), the vertical grooves (321 ) are optionally locked by means of a fixation element (not illustrated in the figures). During a wash cycle, the tub (20) is fed with water and detergent through the detergent drawer. As water starts filling the tub (20), it exerts force to the first wing (51 1 ) of the flap, so that some amount of water, which would not substantially reduce the amount of water required for the wash cycle, is guided below the flap (50) into the tub drain hose (30). Meanwhile, the second wing (512) of the flap (50) raises up by virtue of the monolithic structure of the wings (51 1 , 512) of the flap (50); but since this movement is within the limit of elasticity of the sealing member (53), no clearance is formed between the inner wall (32) of the tub drain hose (30) and the sealing member (53) even if the second wing (512) moves. In this way, no leakage occurs between the second wing (512) and the inner wall (32). When a wash cycle is started, some amount of water will be present in the tub drain hose (30). Thereafter, water entering into the tub drain hose (30) will combine with the water already present there (30), such that the buoyancy of water will lift up the first wing (51 1 ), thereby resulting in an equilibrium of the flap (50). Thus, no clearance is left between the flap (50) and the inner wall (32) of the tub drain hose (30), and therefore detergent flow from the tub (20) into the tub drain hose (30) is prevented.
According to an alternative embodiment, the flap (50) can be mounted to the tub drain outlet (21 ) in a similar way as it is mounted to the tub drain hose (30). However, the mounting of the flap to the tub drain hose (30) is simpler as compared to the tub drain outlet (21 ). After the flap is mounted to the tub drain hose (30), it is secured to the tub drain outlet (21 ) by means of fixation means.
The protection scope of the present invention is set forth in the accompanying claims and is not to be restricted to the illustrative disclosures given above, under the detailed description. It is obvious that a person skilled in the art can produce similar embodiments under the light of the foregoing disclosures, without departing from the main principles of the present invention.
REFERENCE NUMBERS
10 Drum
20 Tub
21 Tub drain outlet
30 Tub drain hose
31 Hose inlet
32 Inner wall
321 Vertical groove
322 Peripheral groove
40 Drain pump
50 Flap
51 Body
51 1 First wing
512 Second wing
513 Wall
514 Folding line
52 Tab
53 Sealing member a: Assembly axis a: Obtuse angle

Claims

1 . A washing machine comprising a tub (20) in which washing takes place, a tub drain outlet (21 ) draining water out of the tub (20) after washing, a tub drain hose (30) with an inner wall (32) in connection with the tub drain outlet (21 ), and a circular flap (50) disposed in the tub drain hose (30), characterized in that the flap (50) comprises at least one first wing (51 1 ) and at least one second wing (512) disposed at an obtuse angle (a) to each other, and that the flap (50) is connected to the tub drain hose (30) so that the flap (50) is partially movable about an assembly axis (a) defined by a folding line (514) joining together the first wing (51 1 ) and the second wing (512).
2. The washing machine according to claim 1 , wherein the flap (50) comprises two tabs (52) provided at the two opposite ends of the folding line (514) so as to be connected to the inner wall (32).
3. The washing machine according to claim 2, wherein the tub drain hose (30) comprises two vertical grooves (321 ) in the inner wall (32) for receiving the tabs (52).
4. The washing machine according to claim 3, wherein the tub drain hose (30) comprises a peripheral groove (322) disposed along the inner wall (32) at the continuation of the vertical grooves (321 ).
5. The washing machine according to claim 1 , wherein the flap (50) comprises a sealing member (53) disposed along the wall (513) thereof.
6. The washing machine according to claim 1 , wherein the angle between the wings (51 1 , 512) is between 120 and 170 degrees, preferably 150 degrees. The washing machine according to claim 5, wherein the sealing member (53) is a flexible o-ring made of a rubber material in a conical form.
The washing machine according to claim 3, wherein the washing machine comprises a fixation member to cover the vertical grooves (321 ).
EP13791767.0A 2012-11-14 2013-11-05 Washing machine having a flap at the tub drain hose Active EP2920350B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201213137 2012-11-14
PCT/EP2013/073013 WO2014075948A1 (en) 2012-11-14 2013-11-05 Washing machine having a flap at the tub drain hose

Publications (2)

Publication Number Publication Date
EP2920350A1 true EP2920350A1 (en) 2015-09-23
EP2920350B1 EP2920350B1 (en) 2017-02-01

Family

ID=49584701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13791767.0A Active EP2920350B1 (en) 2012-11-14 2013-11-05 Washing machine having a flap at the tub drain hose

Country Status (2)

Country Link
EP (1) EP2920350B1 (en)
WO (1) WO2014075948A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712093C3 (en) * 1977-03-19 1980-12-18 G. Bauknecht Gmbh, 7000 Stuttgart Washer or washer dryer
DE3514933A1 (en) 1985-04-25 1986-10-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt DRUM WASHING MACHINE
FR2836936B1 (en) * 2002-03-06 2004-08-20 Barndt Ind EVACUATION DEVICE FOR A WASHING MACHINE OR THE LIKE
DE202010017496U1 (en) 2010-10-06 2011-12-02 BSH Bosch und Siemens Hausgeräte GmbH Closing device for the tub of a laundry treatment machine

Also Published As

Publication number Publication date
WO2014075948A1 (en) 2014-05-22
EP2920350B1 (en) 2017-02-01

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