EP2218816B1 - Tub for washer or washer/dryer machine provided with conduits - Google Patents
Tub for washer or washer/dryer machine provided with conduits Download PDFInfo
- Publication number
- EP2218816B1 EP2218816B1 EP10152286A EP10152286A EP2218816B1 EP 2218816 B1 EP2218816 B1 EP 2218816B1 EP 10152286 A EP10152286 A EP 10152286A EP 10152286 A EP10152286 A EP 10152286A EP 2218816 B1 EP2218816 B1 EP 2218816B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tub
- flange
- cover
- tub body
- washer
- 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.)
- Not-in-force
Links
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005406 washing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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
- D06F37/26—Casings; Tubs
-
- 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
-
- 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
- D06F39/087—Water level measuring or regulating devices
Definitions
- the present patent application for industrial invention relates to a tub for washer or washer-dryer machine.
- the following description makes specific reference to a washer, it being understood that the invention is also extended to a washer/dryer machine.
- a washer comprises a tub (1) in which a rotary drum (300) is mounted and driven into rotation by an electric motor.
- a disc-shaped flange (400) is mounted on the front of the tub (1), commonly defined as loading mouth (400), defining an opening used to load laundry into the drum (300).
- the tub comprises a cylindrical wall (20) open on the front that is connected to a bottom wall (2).
- the bottom wall (2) is reinforced because it must receive a bearing-holder in which the drive shaft that drives the drum into rotation is rotatably mounted.
- a tub (1) comprising a cylindrical lateral wall (20) joined by means of a connection wall (21) to a smooth bottom wall (2) on which a suitably shaped cap (3) acting as reinforcement is engaged and fixed.
- the cap (3) and the bottom wall (2) are provided with axial holes (32, 22) in which a bearing support (SP) is mounted to rotatably support the shaft of the drum.
- SP bearing support
- washers comprise hoses, conduits and chambers connected to the tub, which are used for several applications, in order to control various functions of the washer.
- a pressure intake cover being a closed volume connected to a pressure switch to measure the water level inside the tub.
- the pressure intake cover is obtained in the separation section between the lateral wall (20) of the tub and the loading mouth (400).
- This solution is limitative whenever it is necessary to position the tub assembly with axis with upward inclination inside the casing.
- the pressure intake cover would be mainly in the front, and not in the lowest point of the casing. Such a condition is not favourable for the good operation of the pressure intake cover.
- a recirculation conduit is used to provide communication between the lower part and the upper part of the tub.
- the function of the recirculation conduit is to recirculate pumped water, bringing back in the drum with the laundry the soapy water that is contained in the lower part of the tub outside the drum. This operation allows for fully using the soap, thus increasing the quality of washing (washing class).
- Said recirculation conduit which is separated from the tub, represents an additional cost both for the purchasing price of the part and for its assembly.
- the purpose of the present invention is to eliminate the drawbacks of the prior art, by devising a tub for washer that is practical, versatile, inexpensive and simple to make and assemble. This purpose has been achieved according to the invention with the characteristics described in the enclosed independent claim 1. Advantageous embodiments are disclosed in the dependent claims.
- the tub for washer or washer/dryer according to the present invention comprises:
- the tub body comprises at least a first flange that is coupled with at least a second flange provided in said cover, in such a way to generate a fluid-tight chamber or conduit that can be used for various functions of the appliance, such as pressure intake cover or conduit for passage of fluid.
- a first embodiment of the tub for washer according to the present invention is disclosed, which is generally referred to with numeral (1).
- the tub (1) comprises a tub body composed of a cylindrical wall (20) open on the front and provided with a circular connection section (21) that is connected to a preferably smooth bottom wall (2).
- a cover (3) is engaged and fixed on the bottom wall (2).
- the cover (3) is provided with a circular peripheral section (31) that is advantageously fixed on the peripheral section of the tub body by means of ultrasound welding.
- the cover (3) can be fixed to the tub body also by means of thermowelding, gluing or suitable fixing means.
- the cover (3) is provided with cavities facing the bottom wall (2) in such a way to form a box-shaped structure with it.
- the cover (3) is provided with a plurality of spokes (3a) branching off from a central hub (3b) adapted to house a bearing support (SP) that rotatably supports a shaft of the drum driven into rotation by an electric motor of the washer.
- SP bearing support
- a pressure intake cover (4) is arranged between the connection section (21) of the tub body and the cover (3).
- a first flange (25) protrudes radially outwards from the connection section (21) of the tub body.
- the flange (25) is composed of a flat plate provided with a recessed housing (26) that forms a chamber in communication with the inside of the tub.
- a second flange (35) protrudes radially outwards from the peripheral section (31) of the cover in such a way to be coupled with the first flange (25), forming a fluid-tight chamber (40), as shown in Fig. 4 , which is the pressure intake cover (4).
- the recessed housing (26) can be obtained only in the flange (35) of the cover or in both flanges (25 and 35).
- tightness means such as gaskets
- gaskets can be provided between the two flanges (25, 35) to ensure water-tightness of the chamber (40) of the pressure intake cover.
- said gaskets are not necessary if gluing or welding technology is used to assemble the two parts; in fact, water-tightness is equally guaranteed in these two cases.
- the flange (35) of the cover is connected to the peripheral section (31) of the cover by means of a connection section (34) arranged above the connection section (21) of the tub body. Still referring to Fig. 2 , the flange (35) of the cover is provided with a shank (36) with through hole. A pipe (5) is connected to the shank (36) and to a pressure switch (not shown) to measure the pressure in the chamber (40) and consequently the water level inside the tub.
- FIGs. 5 - 7 show a variant of the tub (1), in which the recessed housing (226) is obtained in the second flange (35) joined to the cover. A hole (225) in communication with the inside of the tub is obtained in the first flange (25) joined to the tub body, as shown in Fig. 7 .
- the shank (36) for connection of the pipe (5) is obtained in the recessed housing (226) of the cover flange.
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)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
- Sink And Installation For Waste Water (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Description
- The present patent application for industrial invention relates to a tub for washer or washer-dryer machine. The following description makes specific reference to a washer, it being understood that the invention is also extended to a washer/dryer machine.
- Referring to
Fig. 1 , as it is known, a washer comprises a tub (1) in which a rotary drum (300) is mounted and driven into rotation by an electric motor. A disc-shaped flange (400) is mounted on the front of the tub (1), commonly defined as loading mouth (400), defining an opening used to load laundry into the drum (300). - The tub comprises a cylindrical wall (20) open on the front that is connected to a bottom wall (2). Generally, the bottom wall (2) is reinforced because it must receive a bearing-holder in which the drive shaft that drives the drum into rotation is rotatably mounted.
- Referring to
Fig. 1A , the patent applicationWO2008/102396 in the name of the same applicant discloses a tub (1) comprising a cylindrical lateral wall (20) joined by means of a connection wall (21) to a smooth bottom wall (2) on which a suitably shaped cap (3) acting as reinforcement is engaged and fixed. The cap (3) and the bottom wall (2) are provided with axial holes (32, 22) in which a bearing support (SP) is mounted to rotatably support the shaft of the drum.
In general, washers comprise hoses, conduits and chambers connected to the tub, which are used for several applications, in order to control various functions of the washer. - For example, the use of a pressure intake cover is known, being a closed volume connected to a pressure switch to measure the water level inside the tub.
- Referring to
Fig. 1 , according to the known art, the pressure intake cover is obtained in the separation section between the lateral wall (20) of the tub and the loading mouth (400). This solution is limitative whenever it is necessary to position the tub assembly with axis with upward inclination inside the casing. In such a case, the pressure intake cover would be mainly in the front, and not in the lowest point of the casing. Such a condition is not favourable for the good operation of the pressure intake cover. - Another application is known, in which a recirculation conduit is used to provide communication between the lower part and the upper part of the tub. The function of the recirculation conduit is to recirculate pumped water, bringing back in the drum with the laundry the soapy water that is contained in the lower part of the tub outside the drum. This operation allows for fully using the soap, thus increasing the quality of washing (washing class).
- Said recirculation conduit, which is separated from the tub, represents an additional cost both for the purchasing price of the part and for its assembly.
- The purpose of the present invention is to eliminate the drawbacks of the prior art, by devising a tub for washer that is practical, versatile, inexpensive and simple to make and assemble.
This purpose has been achieved according to the invention with the characteristics described in the enclosedindependent claim 1.
Advantageous embodiments are disclosed in the dependent claims. - The tub for washer or washer/dryer according to the present invention comprises:
- a tub body composed of a basically cylindrical lateral wall connected by means of a circular connection section to a bottom wall, and
- a cover provided with a circular peripheral section coupled with said bottom wall of the tub body, in such a way to form a box-shaped structure.
- The tub body comprises at least a first flange that is coupled with at least a second flange provided in said cover, in such a way to generate a fluid-tight chamber or conduit that can be used for various functions of the appliance, such as pressure intake cover or conduit for passage of fluid.
- The advantages of the tub of the invention appear evident, which makes use of the coupling between the back cover and the tub body to generate chambers and conduits that can be used for various functions of the washing machine, thus saving considerably on space and avoiding the provision and assembly of additional parts.
- Additional characteristics of the invention will appear evident from the following detailed description, which refers to merely illustrative, not limiting embodiments, illustrated in the enclosed drawings, wherein:
-
Fig. 1 is an exploded perspective view of a washing assembly for washer according to the known art; -
Fig. 1A is an exploded perspective view of an improved tub for washer according to the known art; -
Fig. 2 is an exploded partially-cut perspective view of a first embodiment of the tub of the invention; -
Fig. 3 is a perspective view of the tub ofFig. 2 after assembly; -
Fig. 4 is a cross-sectional view of a pressure intake cover of the tub ofFig. 3 ; -
Fig. 5 is the same view asFig. 2 , except for it shows a variant of the pressure intake cover; -
Fig. 6 is a back view of the tub ofFig. 5 after assembly; -
Fig. 7 is a cross-sectional view along plane VII-VII ofFig. 6 ; -
Fig. 8 is an exploded perspective view of a second embodiment of the tub of the invention; -
Fig. 9 is a perspective view of the tub ofFig. 8 after assembly; and -
Fig. 10 is a cross-sectional view of a recirculation conduit of the tub ofFig. 9 . - Referring to
Figs. 2 and3 , a first embodiment of the tub for washer according to the present invention is disclosed, which is generally referred to with numeral (1). - The tub (1) comprises a tub body composed of a cylindrical wall (20) open on the front and provided with a circular connection section (21) that is connected to a preferably smooth bottom wall (2).
- A cover (3) is engaged and fixed on the bottom wall (2). The cover (3) is provided with a circular peripheral section (31) that is advantageously fixed on the peripheral section of the tub body by means of ultrasound welding. Obviously, the cover (3) can be fixed to the tub body also by means of thermowelding, gluing or suitable fixing means.
- The cover (3) is provided with cavities facing the bottom wall (2) in such a way to form a box-shaped structure with it. Advantageously, the cover (3) is provided with a plurality of spokes (3a) branching off from a central hub (3b) adapted to house a bearing support (SP) that rotatably supports a shaft of the drum driven into rotation by an electric motor of the washer.
- A pressure intake cover (4) is arranged between the connection section (21) of the tub body and the cover (3).
- A first flange (25) protrudes radially outwards from the connection section (21) of the tub body. The flange (25) is composed of a flat plate provided with a recessed housing (26) that forms a chamber in communication with the inside of the tub.
- A second flange (35) protrudes radially outwards from the peripheral section (31) of the cover in such a way to be coupled with the first flange (25), forming a fluid-tight chamber (40), as shown in
Fig. 4 , which is the pressure intake cover (4). - The recessed housing (26) can be obtained only in the flange (35) of the cover or in both flanges (25 and 35).
- Evidently, tightness means, such as gaskets, can be provided between the two flanges (25, 35) to ensure water-tightness of the chamber (40) of the pressure intake cover. Naturally, said gaskets are not necessary if gluing or welding technology is used to assemble the two parts; in fact, water-tightness is equally guaranteed in these two cases.
- It must be noted that the flange (35) of the cover is connected to the peripheral section (31) of the cover by means of a connection section (34) arranged above the connection section (21) of the tub body. Still referring to
Fig. 2 , the flange (35) of the cover is provided with a shank (36) with through hole. A pipe (5) is connected to the shank (36) and to a pressure switch (not shown) to measure the pressure in the chamber (40) and consequently the water level inside the tub. - In the following description elements identical or corresponding to the ones described above are indicated with the same numerals, omitting a detailed description.
Figs. 5 - 7 show a variant of the tub (1), in which the recessed housing (226) is obtained in the second flange (35) joined to the cover. A hole (225) in communication with the inside of the tub is obtained in the first flange (25) joined to the tub body, as shown inFig. 7 . The shank (36) for connection of the pipe (5) is obtained in the recessed housing (226) of the cover flange. -
Figs. 8 and9 illustrate a second embodiment of the tub of the invention, generally indicated with numeral (101), wherein a recirculation conduit (6) is arranged between the connection section (21) of the tub body and the peripheral section (31) of the cover (3). - A first flange (125) follows the connection section (21) of the tub body for an arc of circle of approximately 80° - 120°. The flange (125) consists in a flat plate with curved profile. The curved flange (125) has a first end (127) that protrudes radially outwards from the connection section (21) of the tub body and a second end with a hole (128) that communicates with a conduit (129) obtained on the cylindrical lateral wall (20) of the tub body.
- A second flange (135) complementary to the first flange (125) follows the peripheral section (31) of the cover for an arc of circle of approximately 80° - 120°. The flange (135) is composed of a curved plate that defines a concave cavity (136) (see
Fig. 10 ). The concave flange (135) has a first end (137) that protrudes radially outwards from the peripheral section (31) of the cover and a second end with a cap (138) that covers the hole (128) of the first flange (125). - The end (137) of the second flange ends with a shank (7) with inlet opening (70). A pipe is connected to the inlet opening (70), which is connected to a pump that draws in the lower part of the tub.
- When the cover (3) is mounted on the back wall (2) of the tub body, the two flanges (125, 126) are coupled, forming a watertight conduit (60), as shown in
Fig. 10 , which is the recirculation conduit (6) that draws soapy water in the lower part of the tub and recirculates it in the upper part of the drum. - The concave cavity (136) can be obtained only in the flange (125) of the tub body or in both flanges (125 and 135).
Evidently, tightness means, such as gaskets, can be provided between the two flanges (125, 135) to ensure water-tightness of the recirculation conduit (60). - Both the tub body and the cover together with the corresponding flanges are made of moulded plastic material.
- Numerous variations and modifications can be made to the present embodiments of the invention by an expert of the art, while still falling within the scope of the invention as claimed in the enclosed claims.
Claims (8)
- Tub (1; 101) for washer or washer/dryer machine.comprising:- a tub body composed of a basically cylindrical lateral wall (20) connected by means of a circular connection section (21) to a flat bottom wall (2), and- a cover (3) provided with a circular peripheral section (31) coupled with the said bottom wall (2) of the tub body, in such a way to form a box-shaped structure,characterised in that
the tub body comprises at least a first flange (25; 125) that is coupled with at least a second flange (35; 135) provided in the said cover, in such a way to generate a fluid-tight chamber (40) or conduit (60) that can be used as pressure intake cover (4) or conduit (6) for passage of fluid. - Tub (1; 101) according to claim 1, characterised in that the first flange (25; 125) is arranged on the said connection section (21) of the tub body and the second flange (35; 135) is arranged on said peripheral section (31) of the cover.
- Tub (1; 101) according to claim 1 or 2, characterised in that at least one between the said first flange (25; 125) and said second flange (35; 135) is provided with a recessed housing (26; 226) or concave cavity (136) to define the said chamber (40) or conduit (60).
- Tub (1) according to claim 3, characterised in that the first flange (25) protrudes radially from the connection section (21) of the tub body and has a recessed housing (26) and the second flange (35) protrudes radially from the said peripheral section (31) of the cover and has a shank (36) with a hole to receive a pipe (5) connected to a pressure switch.
- Tub (1) according to claim 3, characterised in that the first flange (25) protrudes radially from the connection section (21) of the tub body and has a hole (225) that communicates with the inside of the tub and the second flange (35) protrudes radially from the said peripheral section (31) of the cover and has a recessed housing (226) and a shank (36) with a hole to receive a pipe (5) connected to a pressure switch.
- Tub (101) according to claim 3, characterised in that:- the first flange (125) follows the connection section (21) of the tub body for an arc of a circle of approximately 80°-120° and has a first end (127) that protrudes radially outwards and a second end with a hole (128) that communicates with a conduit (129) obtained on the said cylindrical lateral wall (20) of the tub body, and- the second flange (135) follows the peripheral section (31) of the cover for an arc of circle of approximately 80°-120° and is provided with a first end (137) that protrudes radially outwards and has a shank (7) with an inlet opening (70) and a second end with a cap (138) that covers the hole (120) of the first flange.
- Tub (1; 101) according to any of the above claims, characterised in that said at least first flange (25; 125) is integral with said tub body obtained by moulding of plastic materials.
- Tub (1; 101) according to any of the above claims, characterised in that said at least second flange (35; 135) is integral with said tub body obtained by moulding of plastic materials.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMC2009A000027A IT1392894B1 (en) | 2009-02-13 | 2009-02-13 | BATHTUB FOR WASHING MACHINE OR DISHWASHER MAKER CONDUCTED. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2218816A1 EP2218816A1 (en) | 2010-08-18 |
EP2218816B1 true EP2218816B1 (en) | 2013-04-03 |
Family
ID=41104577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10152286A Not-in-force EP2218816B1 (en) | 2009-02-13 | 2010-02-01 | Tub for washer or washer/dryer machine provided with conduits |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100206015A1 (en) |
EP (1) | EP2218816B1 (en) |
CN (1) | CN101812794A (en) |
IT (1) | IT1392894B1 (en) |
RU (1) | RU2010105083A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104562550A (en) * | 2015-02-15 | 2015-04-29 | 海信(山东)冰箱有限公司 | Inner cylinder of roller washing machine and roller washing machine |
USD776377S1 (en) * | 2015-06-19 | 2017-01-10 | Lg Electronics Inc. | Washing machine tub |
USD774718S1 (en) * | 2015-06-19 | 2016-12-20 | Lg Electronics Inc. | Washing machine tub |
US10326323B2 (en) | 2015-12-11 | 2019-06-18 | Whirlpool Corporation | Multi-component rotor for an electric motor of an appliance |
US10704180B2 (en) | 2016-09-22 | 2020-07-07 | Whirlpool Corporation | Reinforcing cap for a tub rear wall of an appliance |
US10693336B2 (en) | 2017-06-02 | 2020-06-23 | Whirlpool Corporation | Winding configuration electric motor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004048556B4 (en) * | 2004-10-04 | 2008-06-05 | Miele & Cie. Kg | Lye container for a washing machine |
DE102004057942B3 (en) * | 2004-11-30 | 2005-12-08 | Miele & Cie. Kg | A plastic wash tank for a domestic washing machine has a water level chamber in the front plate having two parts joined by an integral hinge |
DE102004057943B3 (en) * | 2004-11-30 | 2005-12-08 | Miele & Cie. Kg | The plastic wash tank of a domestic washing machine has a front panel with an integrally moulded water level pressure chamber |
EP1849906B1 (en) * | 2006-04-27 | 2009-11-04 | Electrolux Home Products Corporation N.V. | Integrated tub overflow system for top-loading washing machine |
JP2010532671A (en) * | 2007-02-21 | 2010-10-14 | メッカニカ ジェネラレ エス.アール.エル. | Washing tub with external reinforcement cap on the bottom wall |
-
2009
- 2009-02-13 IT ITMC2009A000027A patent/IT1392894B1/en active
-
2010
- 2010-02-01 EP EP10152286A patent/EP2218816B1/en not_active Not-in-force
- 2010-02-09 US US12/658,299 patent/US20100206015A1/en not_active Abandoned
- 2010-02-11 CN CN201010116287A patent/CN101812794A/en active Pending
- 2010-02-12 RU RU2010105083/12A patent/RU2010105083A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
ITMC20090027A1 (en) | 2010-08-14 |
US20100206015A1 (en) | 2010-08-19 |
IT1392894B1 (en) | 2012-04-02 |
EP2218816A1 (en) | 2010-08-18 |
CN101812794A (en) | 2010-08-25 |
RU2010105083A (en) | 2011-08-20 |
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