EP0559466A1 - Geschirrspülmaschine - Google Patents

Geschirrspülmaschine Download PDF

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Publication number
EP0559466A1
EP0559466A1 EP93301648A EP93301648A EP0559466A1 EP 0559466 A1 EP0559466 A1 EP 0559466A1 EP 93301648 A EP93301648 A EP 93301648A EP 93301648 A EP93301648 A EP 93301648A EP 0559466 A1 EP0559466 A1 EP 0559466A1
Authority
EP
European Patent Office
Prior art keywords
washing
nozzle
tableware
water
vessel
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.)
Granted
Application number
EP93301648A
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English (en)
French (fr)
Other versions
EP0559466B1 (de
Inventor
Kimiaki Nakagawa
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.)
Nippon Senjoki KK
Original Assignee
Nippon Senjoki KK
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 Nippon Senjoki KK filed Critical Nippon Senjoki KK
Publication of EP0559466A1 publication Critical patent/EP0559466A1/de
Application granted granted Critical
Publication of EP0559466B1 publication Critical patent/EP0559466B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0081—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with vertical sliding closing doors, e.g. hood-type dishwashers
    • 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
    • A47L15/4278—Nozzles
    • A47L15/428—Rotary nozzles
    • 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0078—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits
    • 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
    • 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
    • A47L15/4278—Nozzles
    • A47L15/4282—Arrangements to change or modify spray pattern or direction
    • 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals

Definitions

  • the present invention relates to a tableware washing machine suitable for business use.
  • the reference numeral 1 denotes a washing vessel, which is a square vessel about 60 cm in one side and which holds washing water 2 therein at a predetermined certain level and at a predetermined certain washing concentration.
  • the upper edge of the washing vessel 1 is formed as a flange 20.
  • Reference numeral 3 designates a washing pump, which is driven by a motor 4.
  • a suction port 5 is connected to the bottom of the washing vessel 1, and above the suction port 5 is provided a strainer 7 having a large number of water passing holes 6 to prevent the passage of admixtures (leftovers) larger than a predetermined size contained in the washing water 2 which is sucked in from the suction port 5.
  • the washing water 2 pressurized by the washing pump 3 flows from a discharge port 8 connected to the washing vessel 1 separately into a lower conduit 9 and an upper conduit 10 both in the washing vessel.
  • Reference numeral 11 denotes a lower washing nozzle arm having an overall length of about 50 cm and having six to eight nozzle spouts as a total of both nozzle spouts 12 and nozzle spouts 13, 13' located close to the outer peripheral portion.
  • the lower washing nozzle arm 11 is carried on a bearing 15 rotatable with a pipe 14 as a rotary shaft, the pipe 14 being located in the center of the lower conduit 9, to form a double conduit.
  • Reference numeral 18 denotes a rinsing nozzle arm, which is engaged with the pipe 14 rotatable through a bearing portion 17. Six to ten rinsing nozzle tips 19 are implanted in the rinsing nozzle arm 18.
  • Reference numeral 21 designates a rinsing pump, which is driven by a rinsing pump motor 22.
  • the rinsing pump 21 sucks in rinsing water 26 from a rinse tank 25 through a suction port 23, pressurizes the rinsing water to a discharge port 24 and introduces it into a lower rinse conduit 28 and an upper rinse conduit 29 through a rinse conduit 27 in the washing vessel 1.
  • the rinsing water 26 pressurized by the rinsing pump 21 passes through the rinse conduit 27 and is introduced into the lower rinse conduit 28, while a portion thereof passes through the upper rinse conduit 29 and is jetted from rinsing nozzle tips 32 provided in four upper corner positions.
  • the washing water 2 pressurized by the washing pump 3 passes through the lower conduit 9 and is introduced into the lower washing nozzle arm 11, while a portion thereof passes through the upper washing conduit 10 and is introduced also to an upper injection nozzle arm 30 disposed in an upper position, then is jetted from upper nozzle spouts 31.
  • Reference numeral 35 denotes a tableware rack, which has a basket structure so as not to be an obstacle to jetting of the washing water 2 from below.
  • the tableware rack 35 has suitable partitions to prevent tableware glasses 36 and tableware bowls 37 from striking against each other, and some consideration is given thereto so as to hold it in a posture easy to be washed.
  • the size of the tableware rack 35 is standardized to 50 cm x 50 cm, and there are various tableware racks, depending on purposes of use, including those for glasses, bowls, dishes and places.
  • Reference numeral 41 denotes a hood for preventing the washing water 2 from scattering to the exterior during washing.
  • the hood 41 is lifted at the time of taking in or out of the tableware rack 35 containing the tableware articles 36 and 37.
  • Reference numeral 42 denotes a base structure in which the washing pump 3, rinsing pump 21, rinse tank 25 and a control box (not shown) are accommodated, and which is supported by four legs 43.
  • the washing water 2 pressurized by the washing pump 3 flows through the lower conduit 9, enters the washing nozzle arm 11 and is jetted from below to the tableware articles 36 and 37 through the nozzle spouts 12 and 13.
  • the nozzle spouts 13, 13' positioned at the outer peripheral portion cause the washing water to be jetted in an inclined state of about 30° in the horizontal direction, while the washing water is jetted vertically from the other nozzles.
  • the washing water 2 is jetted while the washing nozzle arm 11 rotates at a speed of one to two revolutions per second.
  • the upper injection nozzle arm 30 also jets washing water while it is rotating.
  • the nozzle tips 19 located at the outer peripheral portion are inclined about 30° from the vertical direction to the horizontal direction to impart a propulsive force for rotation to the nozzle arm 18, whereby the rinsing water is jetted while the nozzle arm 18 rotates at a speed of one revolution or so per second.
  • the tableware washing machine of the above structure is for business use, and the time required for one washing and rinsing operation is greatly different from that in tableware washing machines for domestic use.
  • the washing and rinsing process must be carried out automatically in about one minute.
  • auxiliary tables 50 and 51 are engaged with the washing machine for performing the tableware washing operation efficiently.
  • Stained tableware articles are packed into a tableware rack 35' beforehand using the auxiliary table 50, then the hood 41 of the tableware washing machine is opened up, the rack 35' is allowed to slide into the central portion of the washing machine, and the hood 41 is brought down.
  • the hood 41 is pulled down in association with a start switch of the a washing machine, whereby the washing pump motor 4 is first operated. Consequently, the washing pump 3 pumps up the washing water 2 in the washing vessel 1 to the lower washing nozzle arm 11 through the discharge pipe 7.
  • the washing water 2 jets from the Next nozzle spouts 12, 13 while the nozzle arm 11 is rotated by a propulsive force induced by the jets, thereby imparting a water current impact to the tableware articles 36 and 37.
  • the washing water 2 pressurized by the washing pump 3 flows through the upper washing conduit 10, reaches the upper washing nozzle arm 30 and jets from the nozzle spouts 31, whereby a water current impact is exerted on the washing water 2 from above the tableware articles 36 and 37, while the nozzle arm 30 rotates (in the same manner as the lower washing nozzle arm 11).
  • the washing pump 3 is operated for about 45 seconds and then stops. Thereafter, after an interval of several seconds, the rinsing pump motor 22 starts operation automatically.
  • the rinsing pump 21 sucks in the rinsing water 26 pre-stored in the rinse tank 25.
  • the rinsing water 26 thus sucked in flows from the discharge port 24 through the conduit 28 and reaches the rinsing nozzle arm 18, which in turn jets the rinsing water from the nozzle tips 19 while it is rotating. In this way, rinsing is performed automatically.
  • the rinsing water 26 pressurized by the rinsing pump 21 passes through the conduit 29 and jets also from the rinsing nozzle tips 32 disposed in four upper corner positions to effect rinsing also from above.
  • the operating time of the rinsing pump 21 is 10 to 15 seconds, and the completion of a series of washing and rinsing operations is advised to an operator by sounding of a buzzer, or the hood 41 is opened up automatically to terminate the operations.
  • the total time is about one minute which is 45 seconds of washing plus several seconds of the rest plus 12 seconds of rinsing.
  • the displacement and discharge pressure of the washing pump 3 as well as the number and shape of the nozzle spouts 12 and 13 with respect to the washing nozzle arm 11 are important factors.
  • the tableware rack 35 is provided with partitions or projections so that in the case where the stained tableware articles to be packed into the rack 35 are glasses 36, the glasses face downward, and in the case of the tableware bowls 37, the bowls face obliquely downward, to prevent overlapping of tableware articles.
  • the tableware rack 35 is located between the lower washing nozzle arm 11 and the upper washing nozzle arm 31, and therefore stained tableware articles are washed while being exposed to water jets from below and above.
  • the water jet from below has a very great influence on the result of washing. This is because the water jet from below directly strikes against the stain adhering to the openings of the glasses 36, and also in the case of the bowls 37, such water jet directly strikes the inside stain, while the washing water 2 jetted from the nozzle spouts 31 of the upper injection nozzle arm 30 merely washes the outside bottom portions of the glasses 36 or bowls 37.
  • Fig. 3 shows a washing style in which plates 52 are washed in an obliquely upward facing state.
  • the plates 52 may be washed in such a posture, so in this case the water jet from the upper injection nozzle arm 30 greatly influences the removal of stain and can be considered more important than the water jet from the lower injection nozzle arm 11.
  • the water jet from the lower injection nozzle arm 11 becomes more important than the water jet from the upper injection nozzle arm 30. Anyhow, in the tableware washing machine, the water jet from the lower injection nozzle arm 11 exhibits a very important effect in comparison with the water jet from the upper injection nozzle arm 30.
  • the height of the tableware rack 35 from the floor surface is maintained at about 80 cm for horizontal engagement thereof with the work tables (85-90 cm in products manufactured in Europe and U.S.A.).
  • the height of the upper edge of the washing machine body be also maintained at 80 cm.
  • this 80 cm height are received, as typical mean values, about 30 cm of the washing vessel 1, about 40 cm of the base structure 42 for accommodating therein the pumps 3 and 21 and the rinse tank 25, and about 10 cm of the legs 43, thus a total of 80 cm.
  • the washing vessel 1 Within the washing vessel 1 are mounted, from above, the rinsing nozzle arm 18 and the lower injection nozzle arm 11, and the washing water 2 is stored below the arm 11.
  • the lower injection nozzle arm 11 rotationally jets the washing water at a distance of about 12 cm below the tableware rack 35.
  • the washing water 2 jetted from the nozzle spouts 12 and 13 passes through the tableware rack 35 while expanding in a sectorial shape and strikes against the tableware articles 36.
  • the spacing between the tableware rack 31 and the lower injection nozzle arm 11 is generally 12 cm, if this spacing is increased to 20 cm or so, the water jet expands in a sectorial shape up to the tableware rack 35, that is, the range covered by the water jet increases and it becomes possible for the water jet to cover the four corners of the rack 35 though not to a thorough extent. For the foregoing reason, however, it is difficult to keep a distance of longer than 12 cm during rotation and water injection of the lower injection nozzle arm 11.
  • the water jet will expand in a sectorial shape, resulting in increase of the area covered by the water jet, but the vigor of the water current weakens in inverse proportion to the square of the distance, so such an increase in distance cannot always be good when consideration is given mainly to detergency.
  • the tableware rack 35 is a square rack of 50 cm by 50 cm and the overall length of the lower injection nozzle arm 11 is also about 50 cm, since the lower injection nozzle arm 11 rotates at a distance of about 12 cm below the rack 35, the water jets from the nozzle spouts 13 located at both ends of the arm 11 does not fully reach the tableware articles placed at the four corners of the rack 35, and hence those tableware articles will not be washed to a satisfactory extent, as shown in Fig. 6. More specifically, the tableware articles placed in the hatched area in Fig. 6 will not be washed to a thorough extent.
  • the lower injection nozzle arm 11 is made as long as about 70 cm and nozzle spouts 13 are provided at both ends in the arm 11, as in Fig. 7, water jets will also reach the tableware articles placed at the four corners of the rack 35, but in this case the water jets to the hatched area outside the rack 35 are unnecessary. Since the area of this hatched portion is about 50% of the area of the tableware rack 35, wasteful water jets are directed to as large an area as 50% and it is required to use a pump 50% larger in capacity. Besides, for rotating the lower injection nozzle arm 11 having a length of 70 cm, it is necessary for the washing machine body to be at least 80 cm square, and such a large size is not practical.
  • the length of the lower injection nozzle arm 11 is set at about 50 cm, the machine body is sized to 60 cm by 60 cm, and a small-sized pump is used, in the full knowledge of insufficient washing of the tableware articles placed at the four corners of the tableware rack which is a square of 50 cm by 50 cm.
  • a fixed nozzle injection type has been put to practical use in which a large number of fixed nozzles are disposed above and below tableware to jet washing water 2 simultaneously, as shown in Fig. 8.
  • jets of the washing water 2 fully reach the four corners and the injection from above and that from below are always balanced to diminish the wobbling of tableware, but it is necessary to use a large-sized pump for effecting such simultaneous water injection from a large number of nozzles, and the product price is high because the arrangement of a large number of upper and lower nozzles makes the construction complicated.
  • each nozzle 61 (63) is set at 5 cm wide, the area covered by the outer peripheral injection nozzles 61 approximately trebles with respect to that covered by the inner peripheral injection nozzles 63. Assuming that the nozzles each ejects the same amount of water, the detergency is determined by the amount of water ejected per unit area, so it can be basically demonstrated that the detergency of the outer peripheral portion is weaker than that of the inner peripheral portion.
  • the outer peripheral nozzles 61 must also take charge of water injection for the tableware articles placed at four corner portions 66 of the tableware rack 60; therefore, there are basic drawbacks such that the washing effect at the four corners 66 is unsatisfactory and the detergency for the tableware placed at the outer peripheral portion of the hatched area 62 is weaker in comparison with the inner peripheral portion.
  • a 4-rotor nozzle injection type according to an embodiment of the present invention compensates for the drawbacks of the rotary nozzle injection type and is far superior in structure and detergency to the conventional rotary nozzle injection type.
  • a tableware washing machine comprising a washing vessel; a plurality of washing branch pipes disposed within the washing vessel; rotatable nozzle arms each having a plurality of nozzle spouts and mounted rotatably to the washing branch pipes respectively so as to be positioned approximately in the same plane; a rinsing water conduit disposed centrally within the washing vessel; and a single rinsing nozzle arm having a plurality of rinsing water injection nozzles and connected rotatable to the rinsing water conduit.
  • a plurality of rotatable nozzle arms for washing are disposed on the same plane, so that the detergency becomes uniform over the whole area of the washing vessel.
  • the washing nozzle structure including rotational centers is realized as an extremely simplified structure, and the provision of a rinsing nozzle shaft in the central space permits the realization of such simple structure, not a complicated double shaft structure.
  • This simple structure in combination with plastic molding of the rotatable nozzle arms, permits the attainment of a tableware washing machine which, as a total construction, is less expensive and higher in performance than the old type.
  • Fig. 10 is a structural diagram showing a principal section of a 4-rotor nozzle washing machine embodying the present invention
  • Fig. 11 is a perspective view of a main portion of the washing machine.
  • washing water 102 is stored in a washing vessel 101.
  • the washing water 102 passes through a large number of small holes 106 formed in a strainer 107, reaches a washing pump 103 through a suction port 105, is pressurized by the same pump, passes through a discharge conduit 109 in the washing vessel 101, and flows from a 4-way branch pipe 151 into four riser pipes 152, 152'.
  • An end portion 153 of each of the four riser pipes 152, 152' is formed as a blank cap, and three to four holes 154 are formed in the peripheral surface of each of the riser pipes 152, 152' in positions just under the blank cap.
  • the washing water 102 passes through the holes 154 of those riser pipes and flows into the four rotatable nozzle arms 111.
  • Each rotatable nozzle arm 111 has two nozzle spouts 113 formed in outer peripheral positions and one nozzle spout 113' formed in the vicinity of the inner peripheral portion.
  • the washing water 102 is ejected from the nozzle spouts 113, 113' and strikes as water jets against tableware articles 136 and 137 packed onto a tableware rack 135.
  • the washing water 102 pressurized by the washing pump 103 is branched from the upper portion of the 4-way branch pipe 151 and flows to an upper washing nozzle through an upper washing conduit 110 to effect jet washing from above.
  • tableware washing since the jet washing from below exerts an important influence on the result of washing in comparison with the jet washing from below, reference to the details of the upper washing nozzle structure is here omitted.
  • one of the two outer peripheral nozzle spouts 113 is set to eject water in an inclined state of about 30° from just above because of its self-rotation and it rotates at a rate of two to three revolutions per second.
  • the rotatable nozzle arms 111 shown in Fig. 13 are arranged to quarter the area of the tableware rack 135 on the same plane in such a manner as to avoid mutual collision of the four rotatable nozzle arms 111 even when rotating, when viewed front above the rack 135, as shown in Fig. 12. More specifically, the four rotatable nozzle arms 111 are disposed on the same plane approximately in the center of planarly quartered portions of the tableware rack 135.
  • hatched portions 162 are covered by four nozzle spouts 113 of two rotatable nozzle arms 111, while a central hatched portion 163 is covered by eight outer peripheral nozzle spouts 113 of four rotatable nozzle arms, and thus the entire inside area of the tableware rack 135 can be covered sufficiently by jets of the washing water 102.
  • Fig. 15 shows ranges of water jets striking against the bottom of the tableware rack 135, viewed from above the rack.
  • each of the four rotatable nozzle arms 111 is 242 mm
  • the spacing between the nozzle spouts 113 is 225 mm and the distance of the nozzle spout 113' from the center is about 40 mm, then approximately one fourth of the tableware rack 135 is covered as seen from Figs. 14 and 15.
  • a doughnut-like portion is covered by two outer peripheral nozzle spouts 113, and since the area of that portion is 439 mm2, one nozzle takes in charge of an area of 220 mm2 .
  • the area of the inner peripheral portion is 176 mm2, which is covered by one inner peripheral nozzle spout 113'. Therefore, the ratio of the area, of which one outer peripheral nozzle spout 113 takes in charge, to the area, of which one inner peripheral nozzle spout 113' takes in charge, is 1.25 : 1.0, and thus, the area covered by the outer peripheral nozzle spout 113 is 25% larger. But this difference is a minor difference in comparison with the conventional rotary nozzle injection type, scarcely causing any obstacle in practical use. It is seen that jet washing is performed almost uniformly up to the outer and inner peripheral portions.
  • the overall length of the lower rotatable nozzle arm 11 shown in Figs. 1 and 2 is about 50 cm, while the four rotatable nozzle arms 111 used in this embodiment according to the present invention is about 25 cm in overall length, which is a half of the former.
  • the nozzle arm 11 as long as 50 cm must be formed as a metallic cast or pressed arm to maintain a required mechanical strength, while the rotatable nozzle arms 111 used in this embodiment is short and small-sized, so even molded plastic arms can fully maintain the required strength.
  • plastic arms in Fig. 13, the upper portion of the riser pipe 152 is used as a rotating shaft, and a bearing portion 115 of the rotatable nozzle arm 111 is fitted to the upper portion 154 for rotation.
  • the bearing portion 115 is also a plastic bearing and it rotates around a metallic central shaft without using any special rotating bush, so a durable rotation can be ensured.
  • the injection of the washing water 102 from the nozzle spouts 113, 113' causes the rotatable nozzle arm 11 to undergo a downward reaction force, so that the arm 111 rotates while a thrust stopper 17a and a slide portion 170 formed on the lower side of the arm 111 are kept pushed against each other.
  • a plastic bushing it is necessary to insert a plastic bushing for diminishing the resulting frictional force, but in this embodiment no special bushing is needed because the whole of the rotatable nozzle arm 111 is constituted of a molded plastic arm.
  • each rotatable nozzle arm 111 may be small in size, and hence even a molded plastic arm ensures a sufficient mechanical strength, and a structure equal to an integral molding of the arm with a rotating bearing and a thrust bearing is obtained.
  • a simple structure it is made possible to effect a light rotation of the rotating part while maintaining durability. And this can be attained at a very low cost.
  • the four rotatable nozzle arms 111 are each an integrally molded plastic component including the nozzle spouts 113, 113', bearing portion 115 and thrust bearing portion 170, and the riser pipe 152 which serves as a central rotational shaft for the nozzle arm and through which the washing water 102 is introduced, can be realized by a simple structure integral with the bearing portion 115. Also, as can be seen from Fig. 13, all that is required is a mere fitting of the nozzle arm 111 onto the riser pipe 152 from just above, thus facilitating inspection and cleaning of the nozzle arm 111.
  • a rotatable nozzle arm and a rinsing nozzle arm are sure to be constituted of separate circuits and parts.
  • the nozzle arm 11 and the rinsing nozzle arm 18 are coaxially constituted centrally of the machine, thus requiring a double pipe structure.
  • the four rotatable nozzle arms 111 are located in four positions spaced a predetermined distance from the center of the washing machine, and the upper portion of the center which is indicated at 172 in Fig.
  • a lower rinsing conduit 114 shown in Fig. 10 can be mounted upright by a very simple structure.
  • FIG. 16 A second embodiment according to the present invention will now be described with reference to Figs. 16 and 17.
  • the portions corresponding to those in the previous embodiment will be indicated by the same reference numerals as in the previous embodiment, and explanations thereof will be omitted.
  • This second embodiment relates to a washing machine exclusive for a half-size tableware rack formed in a rectangular shape and having a short to long side ratio of 1:2 in a planar shape.
  • such a washing machine can be realized by adopting a type in which water is ejected from above and below using fixed nozzles, this type involves a problem of an extremely complicated structure.
  • a tableware rack 201 has a planar shape of 25 cm x 50 cm, which is half in size of the tableware rack 135 shown in the first embodiment. Such tableware rack 201 is in wide practical use as a half-size rack. Below the rack 201 are disposed two rotatable nozzle arms 111, and two rotatable nozzle arms 211 of the same shape as the rotatable nozzle arms 111 are disposed above the tableware rack 201.
  • Washing water is distributed to each rotatable nozzle arm 111 through a branch pipe 203, while to the upper rotatable nozzle arms 211 is fed washing water from a horizontal branch pipe 205 through a vertical branch pipe 204.
  • Reference numeral 209 denotes a washing water tank, and washing water stored therein passes through a strainer 207 and reaches a suction port 208 of a pump 202, in which the washing water is pressurized.
  • the washing water thus pressurized is conducted to the central portion of the washing vessel through a riser pipe 210.
  • the washing water flows through the branch pipes 203, 204, 205 and is ejected from the rotatable nozzle arms 111 and 211 disposed each two in lower and upper positions, respectively.
  • Reference numeral 206 designates a casing for preventing the washing water from scattering to the exterior.
  • the casing 206 is provided with a door (not shown) for taking in and out of the tableware rack 201.
  • the size of the casing 206 can be made approximately half the size of the full size rack type tableware washing machine shown in the first embodiment.
  • Such a half-size washing machine is used for the washing of glasses and cups. It is desirable that glasses and cups be handled in a service area near guest seats without carrying them to a special washing place.
  • the use of such half-size washing machine which is half in external size of the full-size rack type tableware washing machine permits the machine to be placed in such service area, that is, glasses and cups can be washed efficiently in a short working area without being carried to a special washing place.
  • washing branch pipes are disposed within a washing vessel and rotatable nozzle arms having plural nozzle spouts are rotatably mounted to those washing branch pipes respectively so as to be positioned approximately on the same plane, plural rotatable nozzle arms for washing are arranged on the same plane, whereby the detergency over the whole area of the washing vessel can be made uniform.
  • a washing vessel is formed in a square shape on a horizontal plane and four washing branch pipes are disposed approximately in the center of quartered portions, respectively, of the washing vessel, so it is possible to make the most rational arrangement for the square washing vessel presently in practice.
  • plural washing branch pipes are arranged in a washing vessel and rotatable nozzle arms each having plural nozzle spouts are rotatably mounted to those washing branch pipes respectively so as to be positioned approximately on the same plane, further a rinsing water conduit is disposed centrally within the washing vessel and a single rinsing nozzle arm having plural rinsing water injection nozzles is connected to the said rinsing water conduit, so the washing nozzles including the respective rotational centers are realized by an extremely simplified structure. Moreover, the provision of a rinsing nozzle shaft in the central space permits the adoption of a simple structure, not a complicated double shaft structure.
  • the tableware washing machine according to the invention of Claim 3 can be mounted in a place of a limited mounting space such as a service area or the like, that is, glass and the like can be washed near guest seats.

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  • Washing And Drying Of Tableware (AREA)
EP93301648A 1992-03-06 1993-03-04 Geschirrspülmaschine Expired - Lifetime EP0559466B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP49178/92 1992-03-06
JP4917892 1992-03-06

Publications (2)

Publication Number Publication Date
EP0559466A1 true EP0559466A1 (de) 1993-09-08
EP0559466B1 EP0559466B1 (de) 1996-09-18

Family

ID=12823804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93301648A Expired - Lifetime EP0559466B1 (de) 1992-03-06 1993-03-04 Geschirrspülmaschine

Country Status (3)

Country Link
EP (1) EP0559466B1 (de)
KR (1) KR940011551B1 (de)
DE (1) DE69304740T2 (de)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19832982A1 (de) * 1998-07-22 2000-02-10 Premark Feg Llc Spülvorrichtung für eine Geschirrspülmaschine
GB2380662A (en) * 2001-10-08 2003-04-16 Wavebest Ltd Glasswashing machine and rack therefor
DE10120894B4 (de) * 2001-04-27 2007-03-01 Miele & Cie. Kg Verfahren zum Spülen von Spülgut
EP1870113A1 (de) * 2006-06-21 2007-12-26 Getinge Disinfection AB Sprühmittel für eine Desinfektionsvorrichtung
DE102009007297A1 (de) 2009-02-03 2010-08-12 Miele & Cie. Kg Spülautomat mit einem quaderförmigen Spülraum
EP3072531A1 (de) 2015-03-26 2016-09-28 Steelco S.p.A. Vorrichtung
IT201700057779A1 (it) * 2017-05-26 2018-11-26 Icos Pharma S P A Dispositivo di contenimento per una macchina di trattamento, in particolare lavaggio e/o sterilizzazione, di prodotti sfusi
US10524634B2 (en) 2017-09-29 2020-01-07 Midea Group Co., Ltd. Dishwasher with combined liquid and air sprayers
US10531781B2 (en) 2017-09-29 2020-01-14 Midea Group Co., Ltd. Dishwasher with discretely directable tubular spray elements
US10631708B2 (en) 2018-09-14 2020-04-28 Midea Group Co., Ltd. Dishwasher with docking arrangement for elevation-adjustable rack
US10765291B2 (en) 2018-09-14 2020-09-08 Midea Group Co., Ltd. Dishwasher with check valve in rotatable docking port
US10898052B2 (en) 2016-09-19 2021-01-26 BSH Hausgeräte GmbH Domestic dishwasher
CN112704449A (zh) * 2020-12-31 2021-04-27 佛山市顺德区美的洗涤电器制造有限公司 用于洗碗机的清洗方法、装置及洗碗机
US11000176B2 (en) 2018-09-14 2021-05-11 Midea Group Co., Ltd. Dishwasher with rotatable diverter valve
US11026559B2 (en) 2019-09-30 2021-06-08 Midea Group Co., Ltd. Dishwasher with image-based fluid condition sensing
US11045066B2 (en) 2019-03-11 2021-06-29 Midea Group Co., Ltd. Dishwasher with keyed coupling to rack-mounted conduit
US11071440B2 (en) 2018-09-14 2021-07-27 Midea Group Co., Ltd. Dishwasher with rack-mounted conduit return mechanism
US11185209B2 (en) 2019-11-20 2021-11-30 Midea Group Co., Ltd. Dishwasher steam generator
US11191416B2 (en) 2019-09-30 2021-12-07 Midea Group Co., Ltd. Dishwasher with image-based position sensor
US11202550B2 (en) 2019-11-20 2021-12-21 Midea Group Co., Ltd. Dishwasher thermal imaging system
US11259681B2 (en) 2019-09-30 2022-03-01 Midea Group Co., Ltd Dishwasher with image-based diagnostics
WO2022057482A1 (en) * 2020-09-16 2022-03-24 Midea Group Co., Ltd. Dishwasher with molded tubular spray element
US11399690B2 (en) 2019-09-30 2022-08-02 Midea Group Co., Ltd. Dishwasher with cam-based position sensor
US11412912B2 (en) 2020-09-21 2022-08-16 Midea Group Co., Ltd. Dishwasher with tubular spray element slip ring alignment
US11464389B2 (en) 2019-09-30 2022-10-11 Midea Group Co., Ltd. Dishwasher with image-based detergent sensing
US11484183B2 (en) 2019-09-30 2022-11-01 Midea Group Co., Ltd. Dishwasher with image-based object sensing
US11484180B2 (en) 2020-11-11 2022-11-01 Midea Group Co., Ltd. Dishwasher with tubular spray element including multiple selectable spray patterns
US11497374B2 (en) 2020-02-19 2022-11-15 Midea Group Co., Ltd. Dishwasher with wall-mounted rotatable conduit
US11826001B2 (en) 2022-02-15 2023-11-28 Midea Group Co., Ltd. Dishwasher with tubular spray element including elongated metal tube and retaining tab for mounting support member thereto

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US2960990A (en) * 1956-01-26 1960-11-22 Whirlpool Co One level dishwasher
DE1183214B (de) * 1961-12-13 1964-12-10 Siemens Elektrogeraete Gmbh Geschirrspuelmaschine
FR1545359A (fr) * 1966-11-29 1968-11-08 Constructa Werke Gmbh Bras d'arrosage pour une machine à laver la vaisselle
DE1628547A1 (de) * 1966-11-29 1970-10-22 Constructa Werke Gmbh Sprueharm fuer eine Geschirrspuelmaschine
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Cited By (44)

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DE19832982A1 (de) * 1998-07-22 2000-02-10 Premark Feg Llc Spülvorrichtung für eine Geschirrspülmaschine
DE19832982C2 (de) * 1998-07-22 2000-08-03 Premark Feg Llc Spülvorrichtung für eine Geschirrspülmaschine
DE10120894B4 (de) * 2001-04-27 2007-03-01 Miele & Cie. Kg Verfahren zum Spülen von Spülgut
GB2380662A (en) * 2001-10-08 2003-04-16 Wavebest Ltd Glasswashing machine and rack therefor
GB2380662B (en) * 2001-10-08 2005-06-01 Wavebest Ltd Glasswashing machine
EP1870113A1 (de) * 2006-06-21 2007-12-26 Getinge Disinfection AB Sprühmittel für eine Desinfektionsvorrichtung
WO2007147536A1 (en) * 2006-06-21 2007-12-27 Getinge Disinfection Ab Spray means for disinfection device
DE102009007297A1 (de) 2009-02-03 2010-08-12 Miele & Cie. Kg Spülautomat mit einem quaderförmigen Spülraum
EP3072531A1 (de) 2015-03-26 2016-09-28 Steelco S.p.A. Vorrichtung
US10898052B2 (en) 2016-09-19 2021-01-26 BSH Hausgeräte GmbH Domestic dishwasher
WO2018216045A3 (en) * 2017-05-26 2019-01-03 Icos Pharma S.P.A. CONTAINMENT DEVICE FOR A PROCESSING MACHINE, ESPECIALLY FOR WASHING AND / OR STERILIZING BULK PRODUCTS
IT201700057779A1 (it) * 2017-05-26 2018-11-26 Icos Pharma S P A Dispositivo di contenimento per una macchina di trattamento, in particolare lavaggio e/o sterilizzazione, di prodotti sfusi
US10524634B2 (en) 2017-09-29 2020-01-07 Midea Group Co., Ltd. Dishwasher with combined liquid and air sprayers
US10531781B2 (en) 2017-09-29 2020-01-14 Midea Group Co., Ltd. Dishwasher with discretely directable tubular spray elements
US11800963B2 (en) 2017-09-29 2023-10-31 Midea Group Co., Ltd. Dishwasher with discretely directable tubular spray elements
US11058279B2 (en) 2017-09-29 2021-07-13 Midea Group Co., Ltd. Dishwasher with discretely directable tubular spray elements
US10631708B2 (en) 2018-09-14 2020-04-28 Midea Group Co., Ltd. Dishwasher with docking arrangement for elevation-adjustable rack
US10765291B2 (en) 2018-09-14 2020-09-08 Midea Group Co., Ltd. Dishwasher with check valve in rotatable docking port
US11071440B2 (en) 2018-09-14 2021-07-27 Midea Group Co., Ltd. Dishwasher with rack-mounted conduit return mechanism
US11000176B2 (en) 2018-09-14 2021-05-11 Midea Group Co., Ltd. Dishwasher with rotatable diverter valve
US11045066B2 (en) 2019-03-11 2021-06-29 Midea Group Co., Ltd. Dishwasher with keyed coupling to rack-mounted conduit
US12042111B2 (en) 2019-09-30 2024-07-23 Midea Group Co., Ltd. Dishwasher with cam-based position sensor
US11026559B2 (en) 2019-09-30 2021-06-08 Midea Group Co., Ltd. Dishwasher with image-based fluid condition sensing
US11191416B2 (en) 2019-09-30 2021-12-07 Midea Group Co., Ltd. Dishwasher with image-based position sensor
US11896182B2 (en) 2019-09-30 2024-02-13 Midea Group Co., Ltd. Dishwasher with image-based object sensing
US11259681B2 (en) 2019-09-30 2022-03-01 Midea Group Co., Ltd Dishwasher with image-based diagnostics
US11889966B2 (en) 2019-09-30 2024-02-06 Midea Group Co., Ltd. Dishwasher with image-based object sensing
US11877711B2 (en) 2019-09-30 2024-01-23 Midea Group Co., Ltd. Dishwasher with image-based detergent sensing
US11399690B2 (en) 2019-09-30 2022-08-02 Midea Group Co., Ltd. Dishwasher with cam-based position sensor
US11633081B2 (en) 2019-09-30 2023-04-25 Midea Group Co., Ltd. Dishwasher with image-based diagnostics
US11464389B2 (en) 2019-09-30 2022-10-11 Midea Group Co., Ltd. Dishwasher with image-based detergent sensing
US11484183B2 (en) 2019-09-30 2022-11-01 Midea Group Co., Ltd. Dishwasher with image-based object sensing
US11766160B2 (en) 2019-09-30 2023-09-26 Midea Group Co., Ltd. Dishwasher with image-based position sensor
US11185209B2 (en) 2019-11-20 2021-11-30 Midea Group Co., Ltd. Dishwasher steam generator
US11864705B2 (en) 2019-11-20 2024-01-09 Midea Group Co., Ltd. Dishwasher thermal imaging system
US11202550B2 (en) 2019-11-20 2021-12-21 Midea Group Co., Ltd. Dishwasher thermal imaging system
US11497374B2 (en) 2020-02-19 2022-11-15 Midea Group Co., Ltd. Dishwasher with wall-mounted rotatable conduit
US11564551B2 (en) 2020-09-16 2023-01-31 Midea Group Co., Ltd Dishwasher with molded tubular spray element
WO2022057482A1 (en) * 2020-09-16 2022-03-24 Midea Group Co., Ltd. Dishwasher with molded tubular spray element
US11412912B2 (en) 2020-09-21 2022-08-16 Midea Group Co., Ltd. Dishwasher with tubular spray element slip ring alignment
US11484180B2 (en) 2020-11-11 2022-11-01 Midea Group Co., Ltd. Dishwasher with tubular spray element including multiple selectable spray patterns
CN112704449B (zh) * 2020-12-31 2022-04-15 佛山市顺德区美的洗涤电器制造有限公司 用于洗碗机的清洗方法、装置及洗碗机
CN112704449A (zh) * 2020-12-31 2021-04-27 佛山市顺德区美的洗涤电器制造有限公司 用于洗碗机的清洗方法、装置及洗碗机
US11826001B2 (en) 2022-02-15 2023-11-28 Midea Group Co., Ltd. Dishwasher with tubular spray element including elongated metal tube and retaining tab for mounting support member thereto

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KR930019184A (ko) 1993-10-18
EP0559466B1 (de) 1996-09-18
DE69304740D1 (de) 1996-10-24
DE69304740T2 (de) 1997-04-03
KR940011551B1 (ko) 1994-12-21

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