EP2920349B1 - Washing machine having a flap at the tub drain outlet - Google Patents

Washing machine having a flap at the tub drain outlet Download PDF

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Publication number
EP2920349B1
EP2920349B1 EP13786250.4A EP13786250A EP2920349B1 EP 2920349 B1 EP2920349 B1 EP 2920349B1 EP 13786250 A EP13786250 A EP 13786250A EP 2920349 B1 EP2920349 B1 EP 2920349B1
Authority
EP
European Patent Office
Prior art keywords
flap
tub
washing machine
drain outlet
wall
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.)
Active
Application number
EP13786250.4A
Other languages
German (de)
French (fr)
Other versions
EP2920349A1 (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 EP2920349A1 publication Critical patent/EP2920349A1/en
Application granted granted Critical
Publication of EP2920349B1 publication Critical patent/EP2920349B1/en
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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
    • 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 having an inner wall and draining water out of the tub after washing, and a circular flap disposed in the tub drain outlet.
  • 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.
  • An opening in the tub drain outlet causes the detergent taken from the detergent drawer 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.
  • DE3624065 describes a washing machine having a valve on a run-off line thereof.
  • the valve body hinged in the form of a flap has a lower specific gravity than water and the run-off line has a spatial region suitable for receiving the valve body when it is held by pump suction in a position pivoted out of the flow path of the detergent to be pumped off.
  • DE102010042038 describes a floating body disposed in a connection part of a water drain system for 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 relates to a washing machine comprising a tub in which washing takes place, a tub drain outlet having an inner wall and draining water out of the tub after washing, and a circular flap disposed in the tub drain outlet.
  • the flap comprises one first wing and one second wing disposed at an obtuse angle to each other, and the flap is connected to the tub drain outlet so that the flap is partially rotatable 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 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 by means of the tabs only such that the body of the flap can move freely.
  • the tub drain outlet comprises two vertical grooves in the inner wall for receiving the tabs.
  • the flap is mounted to the inner wall in this way.
  • the tub drain outlet comprises a peripheral groove disposed along the inner wall at the continuation of the vertical grooves.
  • the flap is kept from dislocating from the vertical grooves under the influence of pressure.
  • the flap comprises a sealing member disposed along the wall thereof.
  • detergent is blocked from flowing between the flap and the inner wall.
  • the angle between the wings is between 120 and 170 degrees, preferably 150 degrees.
  • any clearance between the flap and the inner wall is prevented when the flap is in equilibrium.
  • the sealing member is a flexible o-ring made of a rubber material in a conical form.
  • 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.
  • washing machine comprising a flap at a tub drain outlet 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 a plastic or rubber material to be placed to the tub drain outlet (21) comprises a body (51) comprising a semicircular first wing (511) and a semicircular second wing (512) disposed at a wide angle ( ⁇ ) of 120 to 170 degrees with respect to each other. According to a preferred embodiment, the angle corresponds to 150 degrees.
  • the first wing (511) 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 outlet (30) comprises an inner wall (22) so as to incorporate an annular cavity therein.
  • Two opposite vertical grooves (221) are made in the inner wall (22) within the periphery of the tub drain outlet (21), said grooves being complementary in form to the tabs (52) disposed on the flap (50).
  • an annular groove (222) extends throughout the inner wall (22).
  • the annular groove (222) 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 (221) disposed in the inner wall (22) of the tub drain outlet (21), after which the tabs (52) can be moved horizontally within the annular groove (222).
  • the flap (50) can be turned within the tub drain outlet (21).
  • the sealing member (53) of the flap comes in contact with the inner wall (22) of the tub drain outlet (21) to provide a sealing contact.
  • the vertical grooves (221) 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.
  • water starts filling the tub (20)
  • it exerts force on the first wing (511) 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).
  • the second wing (512) of the flap (50) rises due to the monolithic structure of the wings (511, 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 (22) of the tub drain outlet (21) and the sealing member (53) even if the second wing (512) moves.

Landscapes

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

Description

  • The present invention relates to a washing machine comprising a tub in which washing takes place, a tub drain outlet having an inner wall and draining water out of the tub after washing, and a circular flap disposed in the tub drain outlet.
  • 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. An opening in the tub drain outlet causes the detergent taken from the detergent drawer 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.
  • DE3624065 describes a washing machine having a valve on a run-off line thereof. According to that document, in order to protect the valve-body seat on the annular sealing lip and to stabilize the flow of detergent to be pumped off, the valve body hinged in the form of a flap has a lower specific gravity than water and the run-off line has a spatial region suitable for receiving the valve body when it is held by pump suction in a position pivoted out of the flow path of the detergent to be pumped off.
  • DE102010042038 describes a floating body disposed in a connection part of a water drain system for 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.
  • Further waching machines comprising a flap in the tub drain outlet are known from DE2712093A , FR2836936A and US2813543A .
  • 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 relates to a washing machine comprising a tub in which washing takes place, a tub drain outlet having an inner wall and draining water out of the tub after washing, and a circular flap disposed in the tub drain outlet. Here, the flap comprises one first wing and one second wing disposed at an obtuse angle to each other, and the flap is connected to the tub drain outlet so that the flap is partially rotatable 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, it is mounted to the inner wall by means of 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 outlet comprises two vertical grooves in the inner wall for receiving the tabs. The flap is mounted to the inner wall in this way.
  • According to another preferred embodiment of the present invention, the tub drain outlet 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 when the second wing is raised.
  • 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 outlet thereof.
  • In the following detailed description, a washing machine according to the present invention comprising a flap at a tub drain outlet 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 a plastic or rubber material to be placed to the tub drain outlet (21) comprises a body (51) comprising a semicircular first wing (511) and a semicircular second wing (512) disposed at a wide angle (α) of 120 to 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 (511) 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 outlet (30) comprises an inner wall (22) so as to incorporate an annular cavity therein. Two opposite vertical grooves (221) are made in the inner wall (22) within the periphery of the tub drain outlet (21), said grooves being complementary in form to the tabs (52) disposed on the flap (50). At the continuation of the vertical groove (221), in turn, an annular groove (222) extends throughout the inner wall (22). The annular groove (222) 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 (221) disposed in the inner wall (22) of the tub drain outlet (21), after which the tabs (52) can be moved horizontally within the annular groove (222). Thus, the flap (50) can be turned within the tub drain outlet (21). When the flap (50) is not exposed to water pressure, the sealing member (53) of the flap comes in contact with the inner wall (22) of the tub drain outlet (21) to provide a sealing contact. In order to keep the flap (50) within the vertical grooves (221), the vertical grooves (221) 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 on the first wing (511) 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) rises due to the monolithic structure of the wings (511, 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 (22) of the tub drain outlet (21) 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 (22). 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 (511), thereby resulting in an equilibrium of the flap (50). Thus, no clearance is left between the flap (50) and the inner wall (22) of the tub drain outlet (21), and therefore detergent is prevented from flowing from the tub (20) into the tub drain hose (30).
  • 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, as set forth in the appended claims.
    • REFERENCE NUMBERS
    • 10 Drum
    • 20 Tub
    • 21 Tub drain outlet
    • 22 Inner wall
    • 221 Vertical groove
    • 222 Peripheral groove
    • 30 Tub drain hose
    • 40 Drain pump
    • 50 Flap
    • 51 Body
    • 511 First wing
    • 512 Second wing
    • 513 Wall
    • 514 Folding line
    • 52 Tab
    • 53 Sealing member
    • a: Assembly axis
    • α: Obtuse angle

Claims (8)

  1. A washing machine comprising a tub (20) in which washing takes place, a tub drain outlet (21) having an inner wall (22) and draining water out of the tub (20) after washing, and a circular flap (50) disposed in the tub drain outlet (21), characterized in that the flap (50) comprises one first wing (511) and one second wing (512) disposed at an obtuse angle (α) to each other, and that the flap (50) is connected to the tub drain outlet (21) so that the flap (50) is partially rotatable about an assembly axis (a) defined by a folding line (514) joining together the first wing (511) 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 (22).
  3. The washing machine according to claim 2, wherein the tub drain outlet (21) comprises two vertical grooves (221) in the inner wall (22) for receiving the tabs (52).
  4. The washing machine according to claim 3, wherein the tub drain outlet (21) comprises a peripheral groove (221) disposed along the inner wall (22) at the continuation of the vertical grooves (222).
  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 (511, 512) is between 120 and 170 degrees, preferably 150 degrees.
  7. 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.
  8. The washing machine according to claim 3, wherein the washing machine comprises a fixation member for covering the vertical grooves (221).
EP13786250.4A 2012-11-14 2013-11-05 Washing machine having a flap at the tub drain outlet Active EP2920349B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201213185 2012-11-14
PCT/EP2013/072999 WO2014075946A1 (en) 2012-11-14 2013-11-05 Washing machine having a flap at the tub drain outlet

Publications (2)

Publication Number Publication Date
EP2920349A1 EP2920349A1 (en) 2015-09-23
EP2920349B1 true EP2920349B1 (en) 2016-09-21

Family

ID=49518967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13786250.4A Active EP2920349B1 (en) 2012-11-14 2013-11-05 Washing machine having a flap at the tub drain outlet

Country Status (2)

Country Link
EP (1) EP2920349B1 (en)
WO (1) WO2014075946A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813543A (en) * 1955-07-28 1957-11-19 Murray Corp Pump noise control
DE2712093C3 (en) * 1977-03-19 1980-12-18 G. Bauknecht Gmbh, 7000 Stuttgart Washer or washer dryer
DE3624065A1 (en) 1986-07-16 1988-02-18 Bosch Siemens Hausgeraete Washing machine having a valve in its run-off line
FR2836936B1 (en) * 2002-03-06 2004-08-20 Barndt Ind EVACUATION DEVICE FOR A WASHING MACHINE OR THE LIKE
DE102010042038A1 (en) 2010-10-06 2012-04-12 BSH Bosch und Siemens Hausgeräte GmbH Laundry treating machine has water container having drain opening, that is closed by floating body, where liquid outlet system has outlet line and drain hose, where liquid outlet system is connected at water container

Also Published As

Publication number Publication date
EP2920349A1 (en) 2015-09-23
WO2014075946A1 (en) 2014-05-22

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