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WO1992000035A1 - Lave-vaisselle a bras gicleur rotatif - Google Patents

Lave-vaisselle a bras gicleur rotatif Download PDF

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Publication number
WO1992000035A1
WO1992000035A1 PCT/SE1991/000455 SE9100455W WO9200035A1 WO 1992000035 A1 WO1992000035 A1 WO 1992000035A1 SE 9100455 W SE9100455 W SE 9100455W WO 9200035 A1 WO9200035 A1 WO 9200035A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
lead
flushing
arm
dishwasher
Prior art date
Application number
PCT/SE1991/000455
Other languages
English (en)
Inventor
Lars-Göran KARLSSON
Original Assignee
Asko Cylinda Ab
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 Asko Cylinda Ab filed Critical Asko Cylinda Ab
Publication of WO1992000035A1 publication Critical patent/WO1992000035A1/fr

Links

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
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays

Definitions

  • the present invention relates to a dishwasher with at least one rotating spray arm, which is rotatably mounted in a fixed lead-in pipe for supply of flushing liquid to the arm and has a number of outlet openings for the flushing liquid, and the rotary motion of which is driven by the reaction force from the flushing liquid flowing out through the out ⁇ let openings, the dishwasher having a bottom well, provided with a strainer, as well as a flushing pump, the inlet side of which is connected to the bottom well and the outlet side of which is connected to the spray arm via the lead-in pipe.
  • Dishwashers of the kind described above are previously known, which have a bottom well which is covered with a fine strainer. At the centre of the strainer a coarse strainer is arranged with its bottom at a lower level than the sur ⁇ face of the fine strainer.
  • a flushing pump sucks dishwater from that part of the bottom well which is covered by the fine strainer and supplies water to a rotating spray arm via a fixed lead-in pipe.
  • the spray arm is provided with a number of outlet holes for the water. These are arranged such that the reaction force from the outflowing water provides a driving force for the move ⁇ ment of the spray arm.
  • the dishwasher outlet is connected to the bottom well below the coarse strainer. Particles removed from the dishes remain in the fine strainer or the coarse strainer and are thereby prevented from being supp ⁇ lied to the spray arm and cause resoiling of the dishes.
  • the prewash-up step or steps which initiate the washing-up procedure Particles remaining on the surface of the fine strainer then tend to soil the washing liquid used during subsequent washing-up steps, for example during the main wash-up, thus obtaining an increased resoiling of the dishes. Further, particles located on the surface of the fine strainer will to a certain extent clog the fine strai ⁇ ner and cause a deterioration of its permeability. If parts of the surface of the fine strainer are in this way wholly or partially clogged, there is a risk that the flushing pump will suck air, which causes a deteriorated washing-up effect and increased sound level. A clogged fine strainer also requires more or less frequent manual cleaning, which is a considerable disadvantage.
  • the present invention aims to provide a dishwasher of the kind described in the introductory part of the description, which affords the following advantages:
  • Figure 1 shows a section through the bottom well and the lead-in pipe in a dishwasher according to the invention.
  • Figure 2 shows the lead-in pipe and the fine and coarse strainers of the dish ⁇ washer, seen from above.
  • Figure 3 shows in more detail a section through the lead-in pipe and the spray arm.
  • Figure 4 shows another embodiment of the dishwasher, which has an upper and a lower spray arm, leakage liquid from the bearing of the upper spray arm being used for flushing of cutlery and leakage liquid from the bearing of the lower spray arm being used for flushing of the fine strainer.
  • the figures show a dishwasher according to one embodiment of the invention.
  • the dishwasher container has a bottom 1 in which a bottom well 2 is arranged.
  • the well has around its edge a channel 22 against which a fine strainer 3 makes sea ⁇ ling contact.
  • the fine strainer has an upper surface 31, which is somewhat sloping towards the central part of the strainer, where a coarse strainer 4 is arranged.
  • the strai- ner surface 31 is provided with a large number of fine holes 33 through which the dishwater is able to run down to the part of the well located outside the stub tube 32 of the strainer.
  • the stub tube 32 seals against the bottom of the well, and inside the stub tube is the coarse strainer, at the bottom of which a strainer 41 for retaining larger objects is arranged.
  • the well has a drainage pipe 21, which via a schematically shown conduit 10 is connected to the discharge pump 11 and the discharge pipe 12 of the dishwasher.
  • the flushing water is passed via the lead-in pipe to the arm 6 of the dishwasher.
  • This arm is rotatably journalled around a vertical shaft 7.
  • the arm has a number of outlet holes, of which the holes 61, 62 and 63 are shown.
  • the holes - or at least some of the holes - are directed obliquely back ⁇ wards in the desired direction of rotation of the arm, a .. reaction force thus being obtained which drives the arm around.
  • the flushing pump 14 operates and sucks water from the main part of the bottom well located outside the stub tube 32.
  • the flushing water from the pump flows through the lead-in pipe out into the arm and out through its outlet openings, the dishes thus being flushed and the arm driven around. Thereafter, the 6 flushing water runs down into the bottom of the dishwasher and through the fine strainer 3, where dirt particles are separated, to the bottom well, whereupon the flushing water is again sucked to the flushing pump and so on.
  • the lead-in pipe 5 has a flange 51 which, possibly with an intermediate sealing ring or the like, makes contact with the upper side of the bottom plate 1 of the dishwasher.
  • the lower part of the lead-in pipe is threaded and has a nut 8, by means of which the lead-in pipe is kept in position.
  • a collecting member 9 is arranged to collect leakage water from the bearing of the arm in the lead-in pipe 5 and to direct this leakage water towards the fine strainer for continuous flushing thereof during the washing-up process.
  • This collecting mem ⁇ ber will be described in greater detail with reference to Figure 2, which shows the lead-in pipe seen from above, and to Figure 3, which shows a section through the lead-in pipe 5 and the member 9 in a vertical plane through the centre line of the lead-in pipe and parallel to the connecting line between the centres of the lead-in pipe and the coarse strainer.
  • the collecting member 9 consists of a cup-shaped or channel- shaped member extending around the lead-in pipe 5.
  • the bottom 91 of the member 9 adjoins the tubular main part of the lead-in pipe 5.
  • the cup or channel has a substantially vertical, curved wall 92 which extends around the part of the channel facing away from the fine strainer.
  • On the part of the channel facing the fine strainer there is a V-shaped wall 93.
  • two orifices 94, 95 directed obliquely towards the fine strainer, are formed in the channel.
  • the bottom 91 of the channel is inclined in a direction towards the fine strainer.
  • the arm 6 is shown in Figure 3 in a section perpendicular to the longitudinal direction of the arm.
  • the arm is made of sheet metal and has a bushing 64 of a suitable material with low friction, for example nylon, arranged at the centre of rotation of the arm.
  • the lead-in pipe 5 has a centre part 53, in which a shaft 54 is arranged. The center part is supported by four radial beams 52, between which the flush ⁇ ing water is able to flow up to the arm.
  • a nut 65 retains the arm in position, and between the nut and the arm there is arranged a washer of, for example, ceramics to reduce the friction.
  • the underside of the arm has a hole concentric with the lead-in pipe 5, and there is a gap, designated by arrows 67, between the edge of the hole and the lead-in pipe.
  • the arm plate is folded up around the hole in the manner shown in Figure 3, such that the plate edge nearest the gap 67 is obliquely upwardly-directed and makes an angle with the surface of the lead-in pipe, which has proved to be a mechanically stable design which is simple from the manu ⁇ facturing point of view.
  • the flush- ing pump is operating and supplies water to the arm through the lead-in pipe. A small part of this water flows out through the gap 67 between the arm and the lead-in pipe as leakage water.
  • This water is captured by the member 9 and is directed by the member in two flows towards the parts of the surface 31 of the fine strainer which are located on both sides of the coarse strainer . Dirt particles emana ⁇ ting from the dishes are continuously flushed by these water flows down into the coarse strainer and are thus prevented from adhering to the fine strainer surface.
  • the water flows from the collecting member 9 are directed approximately parallel to the fine strainer surface and therefore provide efficient flushing of the strainer surface. For the same reason, these water flows do not give rise to any mentio- nable formation of eddies in the dishwater and thus to no risk of the flushing pump sucking air.
  • the sealing connection between the arm and the lead-in pipe may be formed in an extremely simple manner, only by forming the arm with a hole, concen ⁇ tric with the lead-in pipe, the diameter of which is made so much larger than that of the lead-in pipe that a gap with a suitable width is obtained between the arm and the lead-in pipe.
  • the flushing water flowing out through the gap keeps the gap free from soiling, and the increase of the rotational resistance with time caused by the soiling, occurring in prior art seals, is eliminated.
  • Figure 4 shows a further embodiment of a dishwasher accor ⁇ ding to the invention. It has a lower dish basket 101 and an upper dish basket 103.
  • the lower basket has a cutlery basket 102 intended for placing cutlery therein.
  • the cut ⁇ lery basket may be a fixed part of the basket 101 or a de ⁇ tachable basket arranged for location at a certain place in the basket 101.
  • the lead-in pipe connected to the outlet side of the flushing pump 14, for feeding the spray arms with washing liquid has a first part 5b, which is designed in the manner shown in Figures 1-3 as a vertical stub tube, the lower part of which is connected to the flushing pump and at the upper part of which a lower flushing arm 6b is journalled.
  • the lead-in pipe also comprises a second part 5a as well as a connecting tube 105.
  • the second part of the lead-in pipe is designed as a vertical stub tube, in the upper part of which an upper arm 6a is journalled. The bottom of the stub tube is closed.
  • the connecting tube 105 interconnects the two parts 5a and 5b of the lead-in pipe and supplies the upper spray arm with washing liquid.
  • the upper spray arm 6a journalled in the upper part 5a of the lead-in pipe is designed and journalled in, for example, the same way as the spray arm shown in Figures 1-3 and is arranged primarily for flushing of dishes located in the upper dish basket 103.
  • the lower spray arm 6b journalled in the lower part 5b of the lead-in pipe is arranged primarily for flushing of dishes located in the lower dish basket 101.
  • the arm 6b is designed and journalled in, for example, the way shown in Figures 1-3.
  • collec ⁇ ting members 9a and 9b are arranged for collection of leak ⁇ age liquid from the bearing of the arms in the lead-in pipes.
  • the collecting members may, for example, be designed in the manner shown in Figures 1-3.
  • the upper collecting member 9a directs the leakage liquid from the bearing of the upper arm towards the cutlery basket 102. This provides, early during the washing-up procedure, preferably during the first prewash-up step, a very effec- tive flushing of objects located in the basket 102. Dirt removed from these objects are -flushed down towards the bottom of the dishwasher and end up in the coarse strainer 4 (see Fig. 1), from where it is removed during the pumping out prior to the immediately following washing-up step. The risk of resoiling of the dishes is thereby considerably reduced.
  • the lower collecting member 9b is adapted for flushing of the fine strainer in the manner described with reference to Figures 1-3.
  • the above-described collecting member for leakage liquid from the bearing of the arm or arms may, of course, be designed for flushing of other objects, located in the dishwasher, than those described as examples above (the fine strainer and the cutlery basket) .
  • the above-described collecting member for leakage water is only one example of an embodiment according to the inven ⁇ tion.
  • the collecting member is designed as an integral part of the lead-in pipe, which provides for simple manufacturing and mounting.
  • the collecting member may be desig ⁇ ned as a separate member mounted at the lead-in pipe.
  • the embodiment described above with two orifices of the collec ⁇ ting member facing the fine strainer and the cutlery basket, respectively, has also proved to be advantageous, but, alternatively, the member may be designed with only one orifice or with more than two orifices .
  • the invention has been described in connection with a dish ⁇ washer in which water is used as washing liquid, but other washing liquids may, of course, be used.
  • the suspension, bearing arrangement and sealing of the arm or arms against the lead-in pipe may be designed in other ways than that described above.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

Lave-vaisselle possédant un bras gicleur rotatif (6) entraîné par les jets d'eau et monté pour tourner dans un tuyau d'amenée flexible fixe débouchant au fond (1) du lave-vaisselle. Le fond du lave-vaisselle comporte un trou (2) et un filtre (3). Une pompe de rinçage (14) aspire de l'eau du trou et alimente le bras gicleur avec cette eau de rinçage par l'intermédiaire du tuyau d'amenée. Un élément collecteur (9) est placé au niveau du point d'appui du bras gicleur sur le tuyau d'amenée pour capter l'eau de fuite et l'orienter vers le filtre afin de le rincer en continu.
PCT/SE1991/000455 1990-06-29 1991-06-25 Lave-vaisselle a bras gicleur rotatif WO1992000035A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9002289A SE468114B (sv) 1990-06-29 1990-06-29 Diskmaskin med uppsamlingsorgan foer laeckvaetska foer renspolning av finsilen
SE9002289-8 1990-06-29

Publications (1)

Publication Number Publication Date
WO1992000035A1 true WO1992000035A1 (fr) 1992-01-09

Family

ID=20379895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000455 WO1992000035A1 (fr) 1990-06-29 1991-06-25 Lave-vaisselle a bras gicleur rotatif

Country Status (3)

Country Link
AU (1) AU8208191A (fr)
SE (1) SE468114B (fr)
WO (1) WO1992000035A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322285A (en) * 1965-01-05 1967-05-30 Whirlpool Co Filter for washing apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322285A (en) * 1965-01-05 1967-05-30 Whirlpool Co Filter for washing apparatus

Also Published As

Publication number Publication date
SE468114B (sv) 1992-11-09
SE9002289L (sv) 1991-12-30
AU8208191A (en) 1992-01-23
SE9002289D0 (sv) 1990-06-29

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