EP1609403B1 - Cuve d'un lave-vaisselle - Google Patents

Cuve d'un lave-vaisselle Download PDF

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Publication number
EP1609403B1
EP1609403B1 EP05291317A EP05291317A EP1609403B1 EP 1609403 B1 EP1609403 B1 EP 1609403B1 EP 05291317 A EP05291317 A EP 05291317A EP 05291317 A EP05291317 A EP 05291317A EP 1609403 B1 EP1609403 B1 EP 1609403B1
Authority
EP
European Patent Office
Prior art keywords
panel
tub
welding
construction according
rack
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.)
Expired - Fee Related
Application number
EP05291317A
Other languages
German (de)
English (en)
Other versions
EP1609403A3 (fr
EP1609403A2 (fr
Inventor
Hee Seok Noh
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1609403A2 publication Critical patent/EP1609403A2/fr
Publication of EP1609403A3 publication Critical patent/EP1609403A3/fr
Application granted granted Critical
Publication of EP1609403B1 publication Critical patent/EP1609403B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4246—Details of the tub

Definitions

  • the present invention relates to a dishwasher, and more particularly, to a tub construction of a dishwasher.
  • a tub construction is known for example from GB-A-1, 227, 699 .
  • high-pressure jets of washing water are emitted from upper and/or lower nozzles inside a dishwasher tub to remove food particles on dishes inside the dishwasher.
  • Fig. 1 is an exploded view showing a process of assembling a related art dishwasher tub.
  • a related art dishwasher 10 has a U-panel 11 forming the sides and top facets of the tub, welded to an L-panel 12 forming the back and bottom facets of the tub.
  • a related art tub having a U-panel 11 forming the sides and top facets of the tub with a single plate and an L-panel 12 forming the back and bottom facets of the tub with a single plate, allows a continuous weld line (L) to be used to weld the two panels together to form the tub.
  • L weld line
  • a weld line (L1) going from the frontal lower portion to the rear lower portion of the tub, is formed to join the bottom and side facets of the tub. Furthermore, an upwardly proceeding weld line (L2) joins the peripheral edge of the rear facet to the side edge of the tub. Then, a weld line (L3) turns a corner at the periphery of the upper facet and proceeds horizontally to the opposite corner connecting the upper facet to the rear facet periphery of the tub to the other corner. Next, a weld line (L4) is formed along the juncture of the edge of the side facet and the periphery of the rear facet. Finally, a weld line (L5) connects the lower side facet edge to the bottom facet edge of the tub.
  • a weld line for welding the U-panel 11 to the L-panel traverses four edges, complicating the welding process. It follows from the complicated welding process that the manufacturing process of the tub is lengthened, reducing productivity.
  • the weld line does not occur on the same two-dimensional plane, but curves three-dimensionally, thereby making it difficult to change the dimensions of the tub.
  • seam welding which is used in the above procedure, does not dispense the same amount of welding material on the corners as is dispensed on the straight weld portions, creating wrinkles and uneven seaming lines.
  • the present invention is directed to tub construction for a dishwasher that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • An object of the present invention is to provide an improved construction for a dishwasher tub that minimizes the time required for tub assembly and facilitates changing of the tub's outer dimensions.
  • Another object of the present invention is to provide a construction for a dishwasher tub having a simplified tub assembly process, thereby improving the manufacturing efficiency of the tub.
  • a further object of the present invention is to provide a construction for a dishwasher tub that is not subject to wrinkling from seam welding corners, and has a uniform weld that is not prone to leaks.
  • said tub construction for a dishwasher further includes: an intermediate panel seam welded to the periphery of the upper panel, and a lower panel seam welded to a lower end of the intermediate panel; an upper rack and a lower rack respectively disposed to enter and exit from the inside of the tub and respectively having a rack roller attached on either side; and a door pivotably fixed to the front of the tub.
  • the dimensions of the flanges at the corners can be varied so that there are no wrinkles created, and thus, no leakage at the welded corner flanges.
  • Fig. 1 is an exploded view showing a process of assembling a related art dishwasher tub
  • Fig. 2 is a sectional view of a dishwasher with a tub, according to an embodiment of the present invention ;
  • Figs. 3 is an exploded view of a tub according to an embodiment of the present invention.
  • Fig. 4 is a perspective view of the tub in Fig. 3 when assembled ;
  • Fig. 5 is a section view showing the welding process of the tub according to the present invention .
  • Fig. 6 is a section view of the tub in Fig. 4 taken along line I-I';
  • Fig. 7 is a perspective view showing a welding portion of a tub corner taken at part A.
  • Fig. 2 is a sectional view of a dishwasher with a tub according to an embodiment of the present invention.
  • a dishwasher having the tub construction of the present invention has a tub 200 forming an exterior and having dishwasher parts formed therein, a door 111 pivotably formed to open and close at the front of the tub 200, and a sump 170 formed at the central bottom portion of the tub 200 for holding washing water.
  • a wash pump 180 is connected to the sump 170 for high-pressure pumping of the washing water stored in the sump 170, and a motor 190 attached to the rear of the wash pump 180 for driving the wash pump 180.
  • the dishwasher includes a water guide 140 for guiding washing water pumped by the wash pump 180, a lower nozzle 160 installed at the top of the sump 170 for spraying washing water toward the upper panel of the tub 200, an upper nozzle 150 extending to the center of the tub 200 from a point of the water guide 140 for spraying washing water towards the upper and/or lower portion of the tub 200, and a top nozzle 155 connected to one end of the water guide 140 at the ceiling of the tub 200 for spraying washing water down from the top thereof.
  • the dishwasher includes an upper rack 120 installed between the upper nozzle 150 and the top nozzle 155 so that it can be pushed into and pulled out of the dishwasher and so that dishes placed thereon are cleaned by spray from the upper nozzle 150 and/or the top nozzle 155, and a lower rack 130 installed between the lower nozzle 160 and the upper nozzle 150 so that it can be pushed into and pulled out of the dishwasher and so that dishes placed thereon are cleaned by spray from the lower nozzle 160 and/or upper nozzle 150.
  • the upper rack 120 is supported by rails (not shown) on the sides inside the tub 200, which allow movement of the upper rack 120 in push and pull directions. Also, when pulled out, the lower rack 130 moves along rollers on either side thereof according to a roller home formed on the top inner portion of the door 111.
  • a user opens the door 111 of the dishwasher, and pulls out the upper rack 120 and/or the lower rack 130. Then, dishes are placed on the racks 120 and 130. Next, the user closes the door 111, enters the desired wash cycle settings, and presses the start button to activate the wash cycle.
  • washing water enters the sump 170.
  • the motor 190 is activated.
  • An impeller (not shown) attached to the motor 190 shaft and installed in the wash pump 180 rotates, pumping the washing water to the lower nozzle 160 and the water guide 140.
  • the washing water pumped by the wash pump 180 flows alternatively to the lower nozzle 160 and the water guide 140 at predetermined intervals.
  • the washing water flowing to the water guide 140 moves to the top nozzle 155 and the upper nozzle 150 to be sprayed therefrom.
  • the dishes stacked on the racks 120 and 130 are cleaned by the sprayed washing water.
  • the top nozzle 155 sprays washing water downward
  • the upper nozzle 150 sprays washing water upwards to wash the dishes stacked on the upper rack 120.
  • the lower nozzle 160 sprays washing water upward to wash the dishes stacked on the lower rack 130. Also, washing water spray holes on the bottom of the upper nozzle 150 can spray washing water downward to simultaneously wash the upper portions of dishes stacked on the lower rack 130.
  • wash cycle when washing water is discharged to the outside, clean washing water is routed into the sump 170 via an entrance hole and is discharged through the nozzles 150 and 160 according to the wash cycle selected.
  • the clean washing water that is discharged rinses the dishes in the racks.
  • the rinse cycle is complete, the washing water is dispelled, and the dry cycle begins. Heat is supplied in the tub for a predetermined period during the dry cycle, and then the entire wash cycle is completed.
  • Figs. 3 is an exploded view of a tub according to an embodiment of the present invention
  • Fig. 4 is a perspective view of the tub in Fig. 3 when assembled.
  • tub of a dishwasher is divided into 3 parts.
  • the tub 200 includes an upper panel 210 forming the upper portion of the dishwasher 200, a lower panel 230 forming the lower portion of the dishwasher 200, and an intermediate panel welded to the peripheral edges of the upper panel 210 and the lower panel 230.
  • a sump receiving hole 233 for receiving a sump (not shown) is defined in the center of the lower panel 230, and lower rack roller guides 232 are formed on the sides of the lower panel 230.
  • the lower rack roller guides 232 protrude inwardly from the outer surface to the inner surface of the lower panel 230, extending for a substantial length from the rear to the front of the lower panel 230. Also, the top of the lower rack roller guide 232 maintains a horizontal position in order to allow rollers on either side of the lower rack to slide in and out along the guide 232. Furthermore, the upper portion of the lower rack roller guide 232 is smoothly finished, so that dishes placed on the lower rack 130 do not clatter when the lower rack 130 is pushed into and pulled out of the dishwasher.
  • grooves and ridges may be stamped on the lower panel 230, to form rails for guiding the fore and aft movement of rollers placed thereon, thereby negating the need to install a separate roller guide on the lower panel.
  • a lower rack roller guide 222 is formed to protrude a predetermined distance inward into the tub 200 from the inner lower portions on either side of the intermediate tub 220.
  • the lower rack roller guide 222 is formed on either side of the intermediate tub 220 to support the rollers of the lower rack 130.
  • the lower rack roller guide 222 is disposed above and spaced a predetermined distance apart from the lower rack roller guide 232 formed on the uppermost part of the lower panel 230. Accordingly, when the lower rack 130 is pulled out from and pushed into the dishwasher, the upper portions of its rollers are supported. Furthermore, the lower rack roller guide 222 can be short in length (as shown in the diagrams), or can extend along the entire depth of the tub 200.
  • the side and rear edges of the upper panel 210 are joined with the top end of the intermediate panel 220. Also, the side and rear edges of the lower panel 230 are joined with the bottom end of the intermediate panel 220.
  • the upper panel 210, intermediate panel 220, and lower panel 230 are joined by seam welding.
  • seam welding being a type of electric resistance welding, uses roller-shaped electrodes to achieve continuous spot welds, which are suitable for applications requiring airtight and/or watertight seals.
  • the above tub construction using three separate panels - an upper panel 210, an intermediate panel 220, and a lower panel 230 - reduces the amount of time needed for welding.
  • the welding time is substantially less than those of the prior art, due to the welding occurring on a two-dimensional plane.
  • the welding lines both make a "U" shape along the upper and lower ends of the intermediate panel 220. Accordingly, a pair of welding rollers can be respectively positioned at the upper and lower ends of the intermediate panel 220 to simultaneously weld the two ends, thus welding the two welding lines at once.
  • Fig. 5 is a section view showing the welding process of the tub according to the present invention.
  • the ends of the intermediate panel 220 and the lower panel 230 are first formed to protrude a predetermined distance outward.
  • the protrusive portion of the intermediate panel 220 (upper welding portion 221) is connected to the protrusive portion of the lower panel 230 (lower welding portion 231).
  • either one of the upper welding portion 220 or lower welding portion 230 is formed to protrude further than the other.
  • the welding portion 221 of the intermediate panel 220 is shorter than the welding portion 231 of the lower panel 230.
  • Fig. 6 is a section view of the tub in Fig. 4 taken along line I-I'.
  • an upper welding portion 221 of the intermediate panel 220 and a lower welding portion 231 of the lower panel 230 are connected to form a welding surface 300.
  • a folded portion 231a continues upward from the lower welding portion 231 to cover the top of the upper welding portion 221.
  • the upper welding portion 221 curves upward from the outwardly curving inner curved portion 221a. Consequently, the folded portion 231a is pressed to the outside of the intermediate panel 220.
  • a predetermined pressure is applied to the outside and inside of the welding portion, so that the welding portion is fixed firmly to the outside of the intermediate panel 220.
  • a roller attached to the top and bottom of the welding portion applies a predetermined pressure thereon, which imparts shearing stress on the welding surface.
  • the folded amount differs at the corners, resulting in wrinkling. When such wrinkling occurs at the corners, uneven welding lines are formed, resulting in gaps that leak water.
  • Fig. 7 is a perspective view showing a welding portion of a tub corner taken at part A.
  • the present invention changes the dimensions of the welding portions at the corners, so that no wrinkling occurs at the corners when seam welding.
  • the corners of the intermediate panel 220 according to the present invention will now be explained.
  • the lower portion of the intermediate panel 220 being the upper welding portion 221, is narrower in width at its corners than at its straight areas.
  • the welding portions at the corners of the upper panel 210 and lower panel 230 can be formed in the same manner as those of the intermediate panel 220, so that their welded surfaces can also be evenly formed to prevent gaps.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Claims (14)

  1. Cuve d'un lave-vaisselle, comprenant :
    un panneau supérieur ;
    un panneau inférieur disposé sous le panneau supérieur ; et
    un panneau intermédiaire connecté perpendiculairement entre le panneau supérieur et le panneau inférieur,
    caractérisée en ce que le panneau supérieur, le panneau intermédiaire, et le panneau inférieur ont des portions de soudage des coins avec des rayons de courbure internes formés de sorte à être plus petits que les rayons de courbure externes des portions de soudage des coins.
  2. Cuve selon la revendication 1, dans laquelle le panneau intermédiaire forme des faces latérale et arrière du lave-vaisselle et a une section transversale horizontale en forme de U.
  3. Cuve selon la revendication 1, dans laquelle le panneau intermédiaire comporte des lignes de soudage respectives à ses extrémités supérieure et inférieure.
  4. Cuve selon la revendication 1, dans laquelle le panneau supérieur et le panneau intermédiaire et/ou le panneau inférieur et le panneau intermédiaire sont accouplés par soudure par joints.
  5. Cuve selon la revendication 4, dans laquelle le panneau supérieur et le panneau inférieur sont soudés simultanément au panneau intermédiaire par une paire de rouleaux de soudage avançant le long d'extrémités supérieure et inférieure du panneau intermédiaire.
  6. Cuve selon la revendication 1, dans laquelle le panneau inférieur a un premier guide de rouleau de panier formé de manière à faire saillie vers l'intérieur à chaque extrémité du panneau inférieur.
  7. Cuve selon la revendication 6, dans laquelle le premier guide de rouleau de panier comporte une surface supérieure pour fixer un rouleau de panier inférieur.
  8. Cuve selon la revendication 1, dans laquelle le panneau intermédiaire comporte en outre un deuxième guide de rouleau de panier faisant saillie vers l'intérieur au niveau de portions latérales inférieures du panneau intermédiaire.
  9. Cuve selon la revendication 8, dans laquelle le deuxième guide de rouleau de panier guide des portions supérieures du panier inférieur.
  10. Cuve selon la revendication 1, dans laquelle le panneau supérieur, le panneau intermédiaire et le panneau inférieur ont des portions soudées dont l'épaisseur au niveau des zones courbes est inférieure à l'épaisseur au niveau des zones droites.
  11. Cuve selon la revendication 1, dans laquelle ledit panneau intermédiaire est connecté à un bord périphérique dudit panneau supérieur par soudure par joints, et ledit panneau inférieur est connecté à une extrémité inférieure dudit panneau intermédiaire par soudure par joints ; et
    un panier supérieur et un panier inférieur sont disposés de manière à être tirés hors de la cuve et poussés dans celle-ci, et ont respectivement un rouleau de panier de chaque côté ; et
    une porte fixée de manière pivotante à une face avant de la cuve,
    caractérisée en ce que le panneau supérieur, le panneau intermédiaire, et le panneau inférieur ont des portions de soudage des coins avec des rayons de courbure internes formés de sorte à être plus petits que les rayons de courbure externes des portions de soudage des coins.
  12. Cuve selon la revendication 11, dans laquelle le panneau supérieur et le panneau intermédiaire sont réunis par une première ligne de soudage, et le panneau intermédiaire et le panneau inférieur sont réunis par une deuxième ligne de soudage.
  13. Cuve selon la revendication 12, dans laquelle les première et deuxième lignes de soudage sont respectivement formées dans un plan bidimensionnel.
  14. Cuve selon la revendication 11, dans laquelle le panneau intermédiaire comporte un premier guide de rouleau de panier faisant saillie depuis des côtés inférieurs de celui-ci, et le panneau inférieur comporte un deuxième guide de rouleau de panier faisant saillie depuis des côtés de celui-ci, les rouleaux de panier étant disposés entre les premier et deuxième guides de rouleau de panier.
EP05291317A 2004-06-24 2005-06-20 Cuve d'un lave-vaisselle Expired - Fee Related EP1609403B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040047430A KR20050122349A (ko) 2004-06-24 2004-06-24 식기 세척기의 터브 조립 구조
KR2004047430 2004-06-24

Publications (3)

Publication Number Publication Date
EP1609403A2 EP1609403A2 (fr) 2005-12-28
EP1609403A3 EP1609403A3 (fr) 2008-03-19
EP1609403B1 true EP1609403B1 (fr) 2012-11-28

Family

ID=35064477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05291317A Expired - Fee Related EP1609403B1 (fr) 2004-06-24 2005-06-20 Cuve d'un lave-vaisselle

Country Status (5)

Country Link
US (1) US20050285487A1 (fr)
EP (1) EP1609403B1 (fr)
KR (1) KR20050122349A (fr)
CN (1) CN1720855B (fr)
AU (1) AU2005202643B2 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2017032779A1 (fr) 2015-08-25 2017-03-02 BSH Hausgeräte GmbH Lave-vaisselle, en particulier lave-vaisselle ménager

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CN109093312B (zh) * 2018-10-08 2023-09-26 江阴市新万沅机件有限公司 一种弯角板材焊接定位装置
CN112790699B (zh) * 2019-11-14 2022-05-17 宁波方太厨具有限公司 一种清洗机
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017032779A1 (fr) 2015-08-25 2017-03-02 BSH Hausgeräte GmbH Lave-vaisselle, en particulier lave-vaisselle ménager

Also Published As

Publication number Publication date
CN1720855A (zh) 2006-01-18
EP1609403A3 (fr) 2008-03-19
AU2005202643A1 (en) 2006-01-12
US20050285487A1 (en) 2005-12-29
EP1609403A2 (fr) 2005-12-28
AU2005202643B2 (en) 2011-03-03
CN1720855B (zh) 2010-05-05
KR20050122349A (ko) 2005-12-29

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