EP1882771B1 - Laundry machine with a fluid balance ring - Google Patents
Laundry machine with a fluid balance ring Download PDFInfo
- Publication number
- EP1882771B1 EP1882771B1 EP06117835.6A EP06117835A EP1882771B1 EP 1882771 B1 EP1882771 B1 EP 1882771B1 EP 06117835 A EP06117835 A EP 06117835A EP 1882771 B1 EP1882771 B1 EP 1882771B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- balance ring
- fluid balance
- spider
- laundry machine
- 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
- 239000012530 fluid Substances 0.000 title claims description 37
- 241000239290 Araneae Species 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 description 16
- 238000005192 partition Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000284 resting effect Effects 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
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
Definitions
- the present invention relates to a laundry machine with a fluid balance ring.
- the fluid balance ring according to the present invention may be used to particular advantage in a washing machine, to which the following description refers purely by way of example.
- Washing machines are known to comprise a fluid balance ring fitted to the drum to correct unbalance of the drum. More specifically, in known solutions, the fluid balance ring is fitted to an open front surface of the drum facing the loading/unloading door, comprises at least one annular chamber filled partly with liquid (normally water or water with added salt), and provides for reducing unbalance at high speed, caused by off-centred items inside the drum.
- liquid normally water or water with added salt
- One example of such a situation is a bundle of towels located on one side of a rotating washing machine drum. When the drum rotates at high speed, the unbalance produced by the towels is counteracted by the fluid inside the balance ring.
- EP 1 605 088 A2 discloses a washing machine with a liquid balance weight mounted at a surface portion of the back of a drum.
- a hub shaped as a cartwheel is mounted there as well.
- the hub is fixed to the drum by means of bolts located at the rim of the hub.
- the balance weight is directly attached to the drum by means of bolts.
- US 5,735,006 discloses a washing machine wherein a drum is connected to a pulley which is rotatably driven by a motor by means of a pulley belt.
- the pulley is combined with a fluid ring working as a liquid balance weight.
- the fluid ring includes a plurality of concentric annular chambers.
- Number 1 in Figure 1 indicates as a whole a washing machine comprising a casing 2 resting on a floor 3 on a number of feet 4.
- Casing 2 supports a revolving drum 5 (defining a wash tub) which rotates about a horizontal rotation axis 6 (in alternative embodiments not shown, rotation axis 6 may be tilted or vertical), and front access to which is closed by a door 7 hinged to casing 2.
- drum 5 is supported on a rotary shaft 8, coaxial with rotation axis 6, with the interposition of a spider 9 connected rigidly to rotary shaft 8 and drum 5 to connect rotary shaft 8 and drum 5 mechanically.
- a fluid balance ring 10 is fitted to drum 5, coaxially with rotation axis 6, to rotate about rotation axis 6 together with drum 5. More specifically, fluid balance ring 10 is fitted rigidly to spider 9, and is therefore located at the closed rear end of drum 5 opposite the open front end facing door 7.
- spider 9 has a central hub fitted to rotary shaft 8; and three spokes 11, each of which is connected rigidly at the outer end to a portion of drum 5, e.g. by means of two screws (not shown) inserted through two holes formed through spoke 11 and screwed inside two threaded holes formed through drum 5.
- spider 9 may comprise a different number of spokes 11 (e.g. 2, 4 or 5).
- fluid balance ring 10 is connected to each spoke 11 of spider 9 by a connecting bracket 12 having at least one through hole 13, and by at least one screw 14 which is inserted through hole 13 in connecting bracket 12 and screwed inside a threaded hole 15 formed through spoke 11 of spider 9.
- the fluid balance ring 10 could be connected in other ways to the spider 9.
- fluid balance ring 10 has a number of annular chambers 16, each of which is hydraulically isolated from the other annular chambers 16, is coaxial with rotation axis 6, and is filled partly with a liquid 17 (normally water or water with added salt).
- Fluid balance ring 10 preferably has a large number of annular chambers 16 (e.g. eleven, as shown in Figure 4 , or more generally at least nine) to reduce the noise produced by fluid balance ring 10 as it rotates.
- spider 9 is precision manufactured and therefore precisely coaxial with rotation axis 6. Consequently, fluid balance ring 10 is also precisely coaxial with (of negligible eccentricity with respect to) rotation axis 6, which is indispensable for ensuring effective balance.
- spider 9 bends very little in use, and so undergoes no noticeable deformation in the opposite direction to the eccentricity of the load in drum 5 (unlike drum 5, which is made of welded and/or riveted sheet metal), thus enabling fluid balance ring 10 to operate in the best possible conditions.
- the efficiency of fluid balance ring 10 is impaired.
- the highly rigid nature of spider 9, however, provides for eliminating or at least minimizing in-service deformation of fluid balance ring 10.
- the above solution allows a highly efficient fluid balance ring 10 to be fitted to spider 9 with no misalignment at either the assembly stage (precision assembly) or in working conditions (superior balancing performance) when drum 5 bends under the effect of an unbalanced load.
- washing machine 1 as described above is cheap and easy to produce, by involving only minor alterations to a known washing machine and no new component parts.
- the above structure also applies to any other kind of laundry machine, such as a drier or a washer-drier.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Description
- The present invention relates to a laundry machine with a fluid balance ring.
- The fluid balance ring according to the present invention may be used to particular advantage in a washing machine, to which the following description refers purely by way of example.
- Washing machines are known to comprise a fluid balance ring fitted to the drum to correct unbalance of the drum. More specifically, in known solutions, the fluid balance ring is fitted to an open front surface of the drum facing the loading/unloading door, comprises at least one annular chamber filled partly with liquid (normally water or water with added salt), and provides for reducing unbalance at high speed, caused by off-centred items inside the drum. One example of such a situation is a bundle of towels located on one side of a rotating washing machine drum. When the drum rotates at high speed, the unbalance produced by the towels is counteracted by the fluid inside the balance ring.
- One example of a washing machine with a fluid balance ring is described in
US6327732B1 , which relates to a fluid balance ring comprising a number of partitions forming a circular circumferential array of sub-chambers; and each partition has a spring-controlled valve, movable, in response to the centrifugal force of the rotating balance ring, from a closed position preventing fluid flow through the partitions, to an open position permitting fluid flow through the partitions. - The earlier
patent application EP 1 722 025 A1 discloses a washing machine with a liquid balance weight mounted at a surface portion of the back of a drum where a spider is also mounted. A drive shaft for transferring a rotational movement from a motor to the drum is fitted into the spider. The legs of the spider are coupled to both the drum and to the liquid balance weight by use of fastening members. - Also
EP 1 605 088 A2 -
DE 298 05 563 U1 teaches a drum of a washing machine comprising a liquid balance weight arranged at its back. The balance weight is in a multipart arrangement. The single parts are fixed to the drum back as segments of a circle between the ends of a spider. - Finally,
US 5,735,006 discloses a washing machine wherein a drum is connected to a pulley which is rotatably driven by a motor by means of a pulley belt. The pulley is combined with a fluid ring working as a liquid balance weight. The fluid ring includes a plurality of concentric annular chambers. - In known washing machines with fluid balance rings, performance of the rings is not always entirely satisfactory and is invariably below expectations.
- It is an object of the present invention to provide a laundry machine with a fluid balance ring, designed to improve balancing performance, to eliminate the aforementioned drawbacks, and which is cheap and easy to produce.
- According to the present invention, there is provided a laundry machine with a fluid balance ring, as claimed in the accompanying Claims.
- A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
-
Figure 1 shows a schematic side view of a washing machine in accordance with the present invention; -
Figure 2 shows a schematic view in perspective of a drum of theFigure 1 washing machine; -
Figure 3 is an exploded view in perspective of theFigure 2 drum; -
Figure 4 shows a schematic section of a portion of a fluid balance ring of theFigure 2 drum. -
Number 1 inFigure 1 indicates as a whole a washing machine comprising acasing 2 resting on a floor 3 on a number of feet 4.Casing 2 supports a revolving drum 5 (defining a wash tub) which rotates about a horizontal rotation axis 6 (in alternative embodiments not shown, rotation axis 6 may be tilted or vertical), and front access to which is closed by a door 7 hinged tocasing 2. - As shown in
Figures 2 and3 ,drum 5 is supported on arotary shaft 8, coaxial with rotation axis 6, with the interposition of aspider 9 connected rigidly torotary shaft 8 anddrum 5 to connectrotary shaft 8 anddrum 5 mechanically. - A
fluid balance ring 10 is fitted todrum 5, coaxially with rotation axis 6, to rotate about rotation axis 6 together withdrum 5. More specifically,fluid balance ring 10 is fitted rigidly tospider 9, and is therefore located at the closed rear end ofdrum 5 opposite the open front end facing door 7. - Preferably, thought not necessarily,
spider 9 has a central hub fitted torotary shaft 8; and threespokes 11, each of which is connected rigidly at the outer end to a portion ofdrum 5, e.g. by means of two screws (not shown) inserted through two holes formed throughspoke 11 and screwed inside two threaded holes formed throughdrum 5. In an alternative embodiment not shown,spider 9 may comprise a different number of spokes 11 (e.g. 2, 4 or 5). According to a preferred embodiment,fluid balance ring 10 is connected to eachspoke 11 ofspider 9 by a connectingbracket 12 having at least one throughhole 13, and by at least onescrew 14 which is inserted throughhole 13 in connectingbracket 12 and screwed inside a threadedhole 15 formed throughspoke 11 ofspider 9. Obviously, thefluid balance ring 10 could be connected in other ways to thespider 9. - In a preferred embodiment shown in
Figure 4 ,fluid balance ring 10 has a number ofannular chambers 16, each of which is hydraulically isolated from the otherannular chambers 16, is coaxial with rotation axis 6, and is filled partly with a liquid 17 (normally water or water with added salt).Fluid balance ring 10 preferably has a large number of annular chambers 16 (e.g. eleven, as shown inFigure 4 , or more generally at least nine) to reduce the noise produced byfluid balance ring 10 as it rotates. - Testing and analysis confirm excellent balancing of
drum 5 ofwashing machine 1 as described above, by virtue offluid balance ring 10 being fitted rigidly tospider 9. - More specifically, being machined,
spider 9 is precision manufactured and therefore precisely coaxial with rotation axis 6. Consequently,fluid balance ring 10 is also precisely coaxial with (of negligible eccentricity with respect to) rotation axis 6, which is indispensable for ensuring effective balance. - Moreover, being extremely rigid,
spider 9 bends very little in use, and so undergoes no noticeable deformation in the opposite direction to the eccentricity of the load in drum 5 (unlikedrum 5, which is made of welded and/or riveted sheet metal), thus enablingfluid balance ring 10 to operate in the best possible conditions. In other words, iffluid balance ring 10 is subjected in use to deformation in the opposite direction to the eccentricity of the load indrum 5, then the efficiency offluid balance ring 10 is impaired. The highly rigid nature ofspider 9, however, provides for eliminating or at least minimizing in-service deformation offluid balance ring 10. - In short, the above solution allows a highly efficient
fluid balance ring 10 to be fitted tospider 9 with no misalignment at either the assembly stage (precision assembly) or in working conditions (superior balancing performance) whendrum 5 bends under the effect of an unbalanced load. - It should be pointed out that, by locating
fluid balance ring 10 at the closed rear end ofdrum 5 opposite the open front end facing door 7, substantially no noise produced by liquid 17 insidefluid balance ring 10 is noticeable by the user whendrum 5 is rotated manually. - Finally, another important point to note is that
washing machine 1 as described above is cheap and easy to produce, by involving only minor alterations to a known washing machine and no new component parts. - Though particularly advantageous for a washing machine, the above structure also applies to any other kind of laundry machine, such as a drier or a washer-drier.
Claims (4)
- A laundry machine (1) comprising:a drum (5) rotating about a rotation axis (6);a rotary shaft (8) supporting the drum (5) and coaxial with the rotation axis (6);a spider (9) connected rigidly to the rotary shaft (8) and the drum (5) to connect the rotary shaft (8) and the drum (5) mechanically, the spider (9) having a number of spokes (11), each of which is connected rigidly at an outer end to a portion of the drum (5) ; anda fluid balance ring (10) fitted to the drum (5) and coaxial with the rotation axis (6);the fluid balance ring (10) being fitted rigidly to each of the spokes (11) of the spider (9)and comprising a number of annular chambers (16), each of which is hydraulically isolated from the other annular chambers (16), is coaxial with the rotation axis (6), and is partly filled with a liquid (17).
- A laundry machine (1) as claimed in Claim 1, wherein the fluid balance ring (10) has a number of connecting brackets (12), each having at least one through hole (13); and a number of screws (14), each inserted through the through hole (13) in a respective connecting bracket (12) and screwed inside a threaded hole (15) formed through a respective spoke (11) of the spider (9).
- A laundry machine (1) as claimed in Claim 1 or 2, wherein the fluid balance ring (10) has at least nine annular chambers (16).
- A laundry machine (1) as claimed in Claim 3, wherein the fluid balance ring (10) has eleven annular chambers (16).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06117835T PL1882771T3 (en) | 2006-07-25 | 2006-07-25 | Laundry machine with a fluid balance ring |
EP06117835.6A EP1882771B1 (en) | 2006-07-25 | 2006-07-25 | Laundry machine with a fluid balance ring |
PCT/EP2007/006588 WO2008012076A1 (en) | 2006-07-25 | 2007-07-25 | Laundry machine with a fluid balance ring |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06117835.6A EP1882771B1 (en) | 2006-07-25 | 2006-07-25 | Laundry machine with a fluid balance ring |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1882771A1 EP1882771A1 (en) | 2008-01-30 |
EP1882771B1 true EP1882771B1 (en) | 2017-01-04 |
Family
ID=37564086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06117835.6A Not-in-force EP1882771B1 (en) | 2006-07-25 | 2006-07-25 | Laundry machine with a fluid balance ring |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1882771B1 (en) |
PL (1) | PL1882771T3 (en) |
WO (1) | WO2008012076A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013221288A1 (en) * | 2013-10-21 | 2015-04-23 | BSH Bosch und Siemens Hausgeräte GmbH | Method for producing an arrangement for a household appliance, arrangement and household appliance for the care of laundry items |
KR102160971B1 (en) * | 2013-11-05 | 2020-10-05 | 삼성전자주식회사 | Balancer and washing machine having the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5735006A (en) | 1996-06-05 | 1998-04-07 | Maytag Corporation | Washing machine pulley and fluid ring |
DE29805563U1 (en) | 1998-03-27 | 1999-08-05 | AEG Hausgeräte GmbH, 90429 Nürnberg | Horizontal washing drum for a washing machine |
US6327732B1 (en) | 2000-05-10 | 2001-12-11 | Maytag Corporation | Fluid balancing ring and method for using same |
KR100587307B1 (en) | 2004-06-09 | 2006-06-08 | 엘지전자 주식회사 | Drum type washing machine and drum of drum type washing machine |
KR100686017B1 (en) | 2005-05-11 | 2007-02-26 | 엘지전자 주식회사 | Washing machine |
-
2006
- 2006-07-25 PL PL06117835T patent/PL1882771T3/en unknown
- 2006-07-25 EP EP06117835.6A patent/EP1882771B1/en not_active Not-in-force
-
2007
- 2007-07-25 WO PCT/EP2007/006588 patent/WO2008012076A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP1882771A1 (en) | 2008-01-30 |
PL1882771T3 (en) | 2017-07-31 |
WO2008012076A1 (en) | 2008-01-31 |
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