EP1707100B1 - Conveyor-type warewasher and spraying tube for same - Google Patents

Conveyor-type warewasher and spraying tube for same Download PDF

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Publication number
EP1707100B1
EP1707100B1 EP06001167A EP06001167A EP1707100B1 EP 1707100 B1 EP1707100 B1 EP 1707100B1 EP 06001167 A EP06001167 A EP 06001167A EP 06001167 A EP06001167 A EP 06001167A EP 1707100 B1 EP1707100 B1 EP 1707100B1
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EP
European Patent Office
Prior art keywords
nozzle
spray
nozzles
spray pipe
inlet
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
EP06001167A
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German (de)
French (fr)
Other versions
EP1707100A3 (en
EP1707100A2 (en
Inventor
Gerhard Frei
Harald Disch
Werner Neumaier
Jürgen Litterst
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Premark FEG LLC
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Premark FEG LLC
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Publication date
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Publication of EP1707100A2 publication Critical patent/EP1707100A2/en
Publication of EP1707100A3 publication Critical patent/EP1707100A3/en
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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
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/241—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • 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
    • A47L15/16—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with rigidly-mounted spraying devices
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/20—Arrangements of several outlets along elongated bodies, e.g. perforated pipes or troughs, e.g. spray booms; Outlet elements therefor

Definitions

  • the invention relates to a spray tube for transport dishwashers according to the preamble of claim 1 and a transport dishwasher, which has at least one such spray tube in at least one spray zone.
  • US 4,735,222 and GB 2 019 204 A disclose spray gates of this type.
  • Transport spray dishwashers having spray pipes for spraying cleaning liquid in a cleaning spray zone and for spraying rinse liquid in a rinse spray zone are known from US 5,156,237 US 4,735,222 known.
  • Conveyor ware washers may be rack conveyor ware washers or flight-type goods washers.
  • the spray pipes can be stationary or movable, for example rotatable, positioned.
  • a liquid supply to another part length of the spray tube is possible.
  • the invention aims to achieve a more uniform distribution of liquid before or at the latest when the sprays strike the sprayed material.
  • FIG. 1 shown spray tube 2 according to the invention of a transport dishwasher for spraying dishes (plates, trays, dishes, cups, glasses, etc.) with liquid containing a plurality of nozzles 4, 6, 8, 10, which are arranged one behind the other in the tube longitudinal direction.
  • the spray tube 2 has an inlet 12, from which liquid can flow in the tube longitudinal direction to the nozzles 4, 6, 8 and 10, and a closed tube end 13. This direction from the inlet 12 to the nozzles 4, 6, 8 and 10 is hereinafter designated as liquid supply direction 24.
  • the nozzle opening 5 of at least the nozzle 12 closest to the inlet 12, preferably of two or more consecutive to the inlet 12 Next nozzles, has an outlet direction 14, which is inclined obliquely opposite to the liquid supply direction seen from the inlet 12 to the nozzles 4, 6, 8, 10 at an inclination angle ⁇ , eg ⁇ 1, ⁇ 2, ⁇ 3.
  • the angle ⁇ is defined between the outlet direction 14 of the nozzle opening 5 and a theoretical transverse plane 22 which extends at right angles to the liquid feed direction 24.
  • Fig. 1 shows an embodiment in which the first three nozzle openings 5, 7 and 9 following the inlet 12 have an outlet direction 14, 16 and 18, respectively, which is inclined obliquely opposite the liquid supply direction 24 at an angle ⁇ 1 or ⁇ 2 or ⁇ 3.
  • These three inclined nozzle openings may all have a same inclination angle, but the inclination angle according to the preferred embodiment of the invention in the liquid supply direction 24 decreases from nozzle to nozzle, so that the inclination angle ⁇ 1 of the first nozzle opening 5 is greatest, for example between 8 ° and 16 ° is; the inclination angle ⁇ 2 of the second nozzle opening 7 is smaller and is preferably between 3 ° and 10 °; and the inclination angle ⁇ 3 of the third nozzle opening 9 is again smaller and is for example between 0 ° and 5 °.
  • the nozzle openings following in the liquid feed direction preferably all have an outlet direction 20 at right angles to the liquid feed direction 24, so that here the angle of inclination ⁇ 4 lies at 0
  • the liquid feed direction 24 extends parallel to the axial pipe center line 26 of the spray tube 2.
  • the spray tube can have over its entire length a constant inner cross section or a changing inner cross section.
  • the spray tube 2 may have a circular tube cross-section or a cross-sectional shape deviating from the circular shape.
  • the nozzle openings 5, 7, 9 and 11 may each have a circular opening cross-section or an opening cross-section deviating from the circular shape, for example a slot.
  • the nozzle openings of the nozzles 4, 6, 8 and 10 can be used in the spray tube 2 nozzle elements with nozzle openings formed in them or accordingly Fig. 1 be formed in the spray tube 2 holes.
  • the nozzles 4, 6, 8, 10 and thus also their nozzle openings 5, 7, 9 and 11 are preferably arranged in depressions 30 of the outer surface of the spray tube 2.
  • the nozzle openings 11 of the nozzles 10, which are arranged perpendicular to the liquid supply direction 24, are preferably at the lowest point of the recess 30.
  • the recesses 30 are preferably concave, round or valley-like bulges in the pipe wall.
  • the opening area of the nozzle opening 5, 7, 9, 11 of the nozzle or of several nozzles 4, 6, 8, 10 is closer to the inlet 12 is or is greater than that at or at the inlet 12 farther away from the nozzle or nozzles.
  • the first nozzle 4 has the largest opening cross-section
  • the second nozzle 6 a second largest smaller opening cross-section
  • the third nozzle 8 a third largest smaller opening cross-section, etc.
  • a group of two or more nozzles, which is closer to the inlet 12 have a larger opening cross-section than the following in the liquid supply direction 24 nozzle or following group of nozzles.
  • the principle is to have starting from the inlet 12 gradually smaller opening cross-sections of the nozzles, at least in the initial section of the nozzle row.
  • Fig. 2 shows a spray tube 42 according to the invention, in which the nozzle openings 5 ', 7', 9 ', 11' of the nozzles 4 ', 6', 8 ', 10' are elongated holes, which in the central region 44 of its longitudinal extent preferably on both sides equal big constriction where the nozzle opening has a smaller width than in each of the two adjacent end portions 46 and 48.
  • the elongated holes 5 ', 7', 9 ', 11' of the nozzles 4 ', 6', 8 ', 10' each have a length 50, a width 52 in the end regions and a constriction width 56 in the central slot area.
  • the slot of the first nozzle opening 5 ' for example, a length of 12 mm, a width in the end portions 52 of 4 mm, and a Einschnürungsweite 56, for example, 3 mm.
  • the second slot 7 'in the liquid feed direction 24 has, for example, a slot length 50 of 12 mm, a hole width in the end areas 52 of 4 mm and a constriction width in the central area 56 of 2.5 mm.
  • the third slot 9 'of the third nozzles 8' in the liquid feed direction 24 has, for example, a slot length 50 of 10 mm, a slot width in the two end areas 52 of 4 mm each and a constriction width in the central area 56 of, for example, 2.5 mm.
  • the following slot of the nozzle opening 11 'of the nozzle 10' has the same dimensions as the previous nozzle opening 9 '.
  • the following slots of nozzle openings for example, have a slot length 50 of 10 mm, a slot width in the end portions 52 of 4 mm, and a constriction width in the central region 56 of, for example, 2 mm.
  • Fig. 3 shows a further preferred embodiment of a nozzle tube 57 of the invention, according to which the longitudinal axis 58 of the slots of Fig. 2 seen in tube side view relative to the axial tube center line 26 not as in Fig. 2 an angle of 90 °, but a smaller angle ⁇ , for example in the range between 85 ° and 50 °, more preferably between 65 ° and 75 °.
  • the spray fan sprayed from them rotates about 90 ° relative to the slot axis 58 about the spray beam centerline.
  • Fig. 4 shows schematically in longitudinal section a conveyor dishwasher according to the invention, in which a group of several upper spray tubes 2 or 42 or 57 are arranged according to the invention with their nozzles directed downwards and a lower group of spray tubes 2 or 42 or 57 according to the invention with their Nozzles are arranged directed upward.
  • the washware 60 is transported by a transport device 62 in the transport direction 64 through the conveyor dishwasher 59.
  • the spray zone 66 shown may be a rotatessprühzone for cleaning items to be washed or a rinse zone for rinsing dishes.
  • nozzles 4 to 10 and their nozzle openings 6 to 11 and the above-described nozzles 4 'to 10' and their nozzle openings 5 'to 11' are respectively provided with the reference numeral 72 in summary.
  • the spray pipes 2 are arranged transversely to the transport direction 64 of the washware 60 in a spray zone 66.
  • the nozzle openings 72 are directed obliquely forward in the transport direction 64, unlike the vertical direction 76, as schematically illustrated by an arrow 78.
  • the nozzle openings 72 deviate from the vertical direction 76 are directed counter to the transport direction 64 obliquely backwards, as schematically represented by an arrow 80.
  • Fig. 4 shows an embodiment in which the Nozzle openings 72 of the intermediate spray pipes 2 (or 42 or 57) arranged between the outer upper flush pipes are aligned in the vertical direction 76.
  • the spray tubes 2 (or 42 or 57) of the lower spray tubes may all be correspondingly Fig. 4 be vertically aligned or their first spray tube and their last spray tube may be slightly rotated according to the upper spray tube group, so that their nozzle openings 72 are directed obliquely to the vertical direction 76 toward the center of the spray zone 66, similar to the arrows 78 and 80 of the front and rear upper spray pipes.
  • Fig. 5 schematically shows an end view of the transport dishwasher of Fig. 4 in which liquid is conveyed from a tank 82 by means of a pump 84 to the spray pipes 2 (or 42 or 57).

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Cleaning In General (AREA)

Description

Die Erfindung betrifft ein Sprührohr für Transportgeschirrspülmaschinen gemäß dem Oberbegriff von Anspruch 1 und eine Transportgeschirrspülmaschine, welche in mindestens einer Sprühzone mindestens ein solches Sprührohr aufweist.The invention relates to a spray tube for transport dishwashers according to the preamble of claim 1 and a transport dishwasher, which has at least one such spray tube in at least one spray zone.

Die US 4 735 222 A und GB 2 019 204 A offenbaren Sprührore dieser Art. Transportgeschirrspülmaschinen mit Sprührohren zum Sprühen von Reinigungsflüssigkeit in einer Reinigungs-Sprühzone und zum Sprühen von Klarspüler-Flüssigkeit in einer Klarspül-Sprühzone sind aus der US 4 735 222 A bekannt. Transportgeschirrspülmaschinen (conveyor ware washers) können Korbtransportspülmaschinen (rack conveyor ware washers) oder Bandtransportspülmaschinen (flight-type ware washers) sein.The US 4,735,222 and GB 2 019 204 A disclose spray gates of this type. Transport spray dishwashers having spray pipes for spraying cleaning liquid in a cleaning spray zone and for spraying rinse liquid in a rinse spray zone are known from US 5,156,237 US 4,735,222 known. Conveyor ware washers may be rack conveyor ware washers or flight-type goods washers.

Die Sprührohre können ortsfest oder bewegbar, beispielsweise rotierbar, positioniert sein. Je nach Ausführungsform gibt es Sprührohre mit Flüssigkeitszufuhr an einem Rohrende und Sprührohre mit Flüssigkeitszufuhr auf halber Rohrlänge. Auch ist eine Flüssigkeitszufuhr auf einer anderen Teillänge des Sprührohres möglich.The spray pipes can be stationary or movable, for example rotatable, positioned. Depending on the embodiment, there are spray pipes with liquid supply to a pipe end and spray pipes with liquid supply halfway along the tube. Also, a liquid supply to another part length of the spray tube is possible.

Durch die Erfindung soll eine gleichmäßigere Flüssigkeitsverteilung vor oder spätestens beim Auftreffen der Sprühstrahlen auf das Sprühgut erzielt werden.The invention aims to achieve a more uniform distribution of liquid before or at the latest when the sprays strike the sprayed material.

Die Aufgabe wird gemäß der Erfindung durch die Merkmale der unabhängigen Patentansprüche gelöst.The object is achieved according to the invention by the features of the independent claims.

Weiter Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Die Erfindung wird im Folgenden mit Bezug auf die beifügten Zeichnungen anhand von bevorzugten Ausführungsformen als Beispiele beschrieben. In den Zeichnungen zeigen

Fig. 1
einen Abschnitt eines Sprührohres nach der Erfindung, teilweise im Längsschnitt,
Fig. 2
eine Seitenansicht auf einen Abschnitt eines Sprührohres gemäß einer weiteren Ausführungsform nach der Erfindung,
Fig. 3
eine Seitenansicht eines Abschnittes eines Sprührohres gemäß einer nochmals weiteren Ausführungsform der Erfindung,
Fig. 4
schematisch, unmaßstäblich einen Längsschnitt durch eine Transportgeschirrspülmaschine nach der Erfindung,
Fig. 5
schematisch, unmaßstäblich eine stirnseitige Ansicht einer Sprühzone der Geschirrtransportspülmaschine von Fig. 4.
The invention will now be described by way of example with reference to the accompanying drawings, given by way of preferred embodiments. In the drawings show
Fig. 1
a section of a spray pipe according to the invention, partly in longitudinal section,
Fig. 2
a side view of a portion of a spray pipe according to a further embodiment of the invention,
Fig. 3
a side view of a portion of a spray tube according to yet another embodiment of the invention,
Fig. 4
schematically, not to scale a longitudinal section through a transport dishwasher according to the invention,
Fig. 5
schematically, not to scale an end view of a spray zone of the dishwashing dishwasher of Fig. 4 ,

Das in Fig. 1 gezeigte Sprührohr 2 nach der Erfindung einer Transportgeschirrspülmaschine zum Besprühen von Spülgut (Teller, Tabletts, Geschirr, Tassen, Gläser usw.) mit Flüssigkeit enthält eine Vielzahl von Düsen 4, 6, 8, 10, welche in Rohrlängsrichtung nacheinander angeordnet sind. Das Sprührohr 2 hat einen Einlass 12, von welchem Flüssigkeit in Rohrlängsrichtung zu den Düsen 4, 6, 8 und 10 fließen kann, und ein geschlossenes Rohrende 13. Diese Richtung vom Einlass 12 zu den Düsen 4, 6, 8 und 10 wird im Folgenden als Flüssigkeitszufuhrrichtung 24 bezeichnet.This in Fig. 1 shown spray tube 2 according to the invention of a transport dishwasher for spraying dishes (plates, trays, dishes, cups, glasses, etc.) with liquid containing a plurality of nozzles 4, 6, 8, 10, which are arranged one behind the other in the tube longitudinal direction. The spray tube 2 has an inlet 12, from which liquid can flow in the tube longitudinal direction to the nozzles 4, 6, 8 and 10, and a closed tube end 13. This direction from the inlet 12 to the nozzles 4, 6, 8 and 10 is hereinafter designated as liquid supply direction 24.

Die Düsenöffnung 5 von mindestens der dem Einlass 12 am nächsten gelegenen Düse 4, vorzugsweise von zwei oder mehr dem Einlass 12 aufeinander folgend am nächsten gelegenen Düsen, hat eine Auslassrichtung 14, welche der vom Einlass 12 zu den Düsen 4, 6, 8, 10 gesehenen Flüssigkeitszufuhrrichtung unter einem Neigungswinkel α, z.B. α1, α2, α3 schräg entgegengerichtet geneigt ist. Der Winkel α ist zwischen der Auslassrichtung 14 der Düsenöffnung 5 und einer theoretischen Querebene 22 definiert, welche sich rechtwinklig zur Flüssigkeitszufuhrrichtung 24 erstreckt.The nozzle opening 5 of at least the nozzle 12 closest to the inlet 12, preferably of two or more consecutive to the inlet 12 Next nozzles, has an outlet direction 14, which is inclined obliquely opposite to the liquid supply direction seen from the inlet 12 to the nozzles 4, 6, 8, 10 at an inclination angle α, eg α1, α2, α3. The angle α is defined between the outlet direction 14 of the nozzle opening 5 and a theoretical transverse plane 22 which extends at right angles to the liquid feed direction 24.

Fig. 1 zeigt eine Ausführungsform, bei welcher die auf den Einlass 12 folgenden ersten drei Düsenöffnungen 5, 7 und 9 eine Auslassrichtung 14 bzw. 16 bzw. 18 haben, welche der Flüssigkeitszufuhrrichtung 24 schräg entgegengerichtet ist mit einem Winkel α1 bzw. α2 bzw. α3. Diese drei geneigten Düsenöffnungen können alle einen gleichen Neigungswinkel haben, jedoch nimmt der Neigungswinkel gemäß der bevorzugten Ausführungsform der Erfindung in Flüssigkeitszufuhrrichtung 24 gesehen von Düse zu Düse ab, so dass der Neigungswinkel α1 der ersten Düsenöffnung 5 am größten ist, beispielsweise zwischen 8° und 16° beträgt; der Neigungswinkel α2 der zweiten Düsenöffnung 7 kleiner ist und vorzugsweise zwischen 3° und 10° beträgt; und der Neigungswinkel α3 der dritten Düsenöffnung 9 nochmals kleiner ist und beispielsweise zwischen 0° und 5° liegt. Die in Flüssigkeitszufuhrrichtung danach folgenden Düsenöffnungen haben vorzugsweise alle eine Auslassrichtung 20 rechtwinklig zur Flüssigkeitszufuhrrichtung 24, so dass hier der Neigungswinkel α4 bei 0° liegt. Fig. 1 shows an embodiment in which the first three nozzle openings 5, 7 and 9 following the inlet 12 have an outlet direction 14, 16 and 18, respectively, which is inclined obliquely opposite the liquid supply direction 24 at an angle α1 or α2 or α3. These three inclined nozzle openings may all have a same inclination angle, but the inclination angle according to the preferred embodiment of the invention in the liquid supply direction 24 decreases from nozzle to nozzle, so that the inclination angle α1 of the first nozzle opening 5 is greatest, for example between 8 ° and 16 ° is; the inclination angle α2 of the second nozzle opening 7 is smaller and is preferably between 3 ° and 10 °; and the inclination angle α3 of the third nozzle opening 9 is again smaller and is for example between 0 ° and 5 °. The nozzle openings following in the liquid feed direction preferably all have an outlet direction 20 at right angles to the liquid feed direction 24, so that here the angle of inclination α4 lies at 0 °.

Die Flüssigkeitszufuhrrichtung 24 erstreckt sich parallel zur axialen Rohrmittellinie 26 des Sprührohres 2. Das Sprührohr kann über seine gesamte Länge einen gleich bleibenden Innenquerschnitt oder einen sich ändernden Innenquerschnitt haben. Das Sprührohr 2 kann einen kreisförmigen Rohrquerschnitt oder eine von der Kreisform abweichende Querschnittsform haben.The liquid feed direction 24 extends parallel to the axial pipe center line 26 of the spray tube 2. The spray tube can have over its entire length a constant inner cross section or a changing inner cross section. The spray tube 2 may have a circular tube cross-section or a cross-sectional shape deviating from the circular shape.

Die Düsenöffnungen 5, 7, 9 und 11 können jeweils einen kreisrunden Öffnungsquerschnitt oder einen von der Kreisform abweichenden Öffnungsquerschnitt haben, beispielsweise ein Langloch sein.The nozzle openings 5, 7, 9 and 11 may each have a circular opening cross-section or an opening cross-section deviating from the circular shape, for example a slot.

Die Düsenöffnungen der Düsen 4, 6, 8 und 10 können in das Sprührohr 2 eingesetzte Düsenelemente mit in ihnen gebildeten Düsenöffnungen oder entsprechend Fig. 1 in dem Sprührohr 2 gebildete Löcher sein.The nozzle openings of the nozzles 4, 6, 8 and 10 can be used in the spray tube 2 nozzle elements with nozzle openings formed in them or accordingly Fig. 1 be formed in the spray tube 2 holes.

Die Düsen 4, 6, 8, 10 und damit auch ihre Düsenöffnungen 5, 7, 9 und 11 sind vorzugsweise in Vertiefungen 30 der äußeren Oberfläche des Sprührohres 2 angeordnet. Hierbei befinden sich die Düsenöffnungen 5, 7, 9, welche der Flüssigkeitszufuhrrichtung 24 schräg entgegen geneigt sind, in dem in Flüssigkeitszufuhrrichtung 24 gesehen hinteren schrägen Vertiefungsabschnitt jeweils einer Vertiefung 30. Die Düsenöffnungen 11 der Düsen 10, welche rechtwinklig zur Flüssigkeitszufuhrrichtung 24 angeordnet sind, befinden sich vorzugsweise an der tiefsten Stelle der Vertiefung 30. Die Vertiefungen 30 sind vorzugsweise konkave, runde oder talartige Wölbungen in der Rohrwand.The nozzles 4, 6, 8, 10 and thus also their nozzle openings 5, 7, 9 and 11 are preferably arranged in depressions 30 of the outer surface of the spray tube 2. In this case, the nozzle openings 5, 7, 9, which are inclined inclined to the liquid supply direction 24, in the liquid supply direction 24 seen rear oblique recessed portion each having a recess 30. The nozzle openings 11 of the nozzles 10, which are arranged perpendicular to the liquid supply direction 24, are preferably at the lowest point of the recess 30. The recesses 30 are preferably concave, round or valley-like bulges in the pipe wall.

Damit mindestens durch einige der Düsen 4, 6, 8, 10 ungefähr die gleiche Flüssigkeitsmenge strömt, ist der Öffnungsquerschnitt der Düsenöffnung 5, 7, 9, 11 der Düse oder von mehreren Düsen 4, 6, 8, 10, welche näher bei dem Einlass 12 angeordnet ist oder sind, größer ist als bei der oder bei den vom Einlass 12 weiter entfernt angeordneten Düse oder Düsen. Vorzugsweise hat ausgehend vom Einlass 12 die erste Düse 4 den größten Öffnungsquerschnitt, die zweite Düse 6 einen zweitgrößten kleineren Öffnungsquerschnitt, die dritte Düse 8 einen drittgrößten noch kleineren Öffnungsquerschnitt usw.. Gemäß einer anderen Ausführungsform kann auch jeweils eine Gruppe von zwei oder mehr Düsen, welche näher bei dem Einlass 12 liegt, einen größeren Öffnungsquerschnitt haben als die in Flüssigkeitszufuhrrichtung 24 folgende Düse oder folgende Gruppe von Düsen. Das Prinzip besteht darin, ausgehend vom Einlass 12 stufenweise kleinere Öffnungsquerschnitte der Düsen zu haben, mindestens im Anfangsabschnitt der Düsenreihe.In order for at least some of the nozzles 4, 6, 8, 10 to flow about the same amount of liquid, the opening area of the nozzle opening 5, 7, 9, 11 of the nozzle or of several nozzles 4, 6, 8, 10 is closer to the inlet 12 is or is greater than that at or at the inlet 12 farther away from the nozzle or nozzles. Preferably, starting from the inlet 12, the first nozzle 4 has the largest opening cross-section, the second nozzle 6 a second largest smaller opening cross-section, the third nozzle 8 a third largest smaller opening cross-section, etc. According to another embodiment, also a group of two or more nozzles, which is closer to the inlet 12, have a larger opening cross-section than the following in the liquid supply direction 24 nozzle or following group of nozzles. The principle is to have starting from the inlet 12 gradually smaller opening cross-sections of the nozzles, at least in the initial section of the nozzle row.

Fig. 2 zeigt ein Sprührohr 42 nach der Erfindung, bei welchem die Düsenöffnungen 5', 7', 9', 11' der Düsen 4', 6', 8', 10' Langlöcher sind, welche im mittleren Bereich 44 ihrer Längserstreckung eine beidseitig vorzugsweise gleich große Einsschnürung aufweisen, wo die Düsenöffnung eine kleiner Breite als in jedem der beiden benachbarten Endbereich 46 und 48 hat. Fig. 2 shows a spray tube 42 according to the invention, in which the nozzle openings 5 ', 7', 9 ', 11' of the nozzles 4 ', 6', 8 ', 10' are elongated holes, which in the central region 44 of its longitudinal extent preferably on both sides equal big constriction where the nozzle opening has a smaller width than in each of the two adjacent end portions 46 and 48.

Die Langlöcher 5', 7', 9', 11' der Düsen 4', 6', 8', 10' haben jeweils eine Länge 50, eine Breite 52 in den Endbereichen und eine Einschnürungsbreite 56 im mittleren Langlochbereich.The elongated holes 5 ', 7', 9 ', 11' of the nozzles 4 ', 6', 8 ', 10' each have a length 50, a width 52 in the end regions and a constriction width 56 in the central slot area.

Gemäß einer bevorzugten Ausführungsform hat das Langloch der ersten Düsenöffnung 5' beispielsweise eine Länge von 12 mm, eine Breite in den Endbereichen 52 von jeweils 4 mm, und eine Einschnürungsweite 56 von beispielsweise 3 mm.According to a preferred embodiment, the slot of the first nozzle opening 5 ', for example, a length of 12 mm, a width in the end portions 52 of 4 mm, and a Einschnürungsweite 56, for example, 3 mm.

Das in Flüssigkeitszufuhrrichtung 24 zweite Langloch 7' hat beispielsweise eine Langlochlänge 50 von 12 mm, eine Lochbreite in den Endbereichen 52 von 4 mm und eine Einschnürungsbreite im mittleren Bereich 56 von 2,5 mm.The second slot 7 'in the liquid feed direction 24 has, for example, a slot length 50 of 12 mm, a hole width in the end areas 52 of 4 mm and a constriction width in the central area 56 of 2.5 mm.

Das in Flüssigkeitszufuhrrichtung 24 dritte Langloch 9' der dritten Düsen 8' hat beispielsweise eine Langlochlänge 50 von 10 mm, eine Langlochbreite in den beiden Endbereichen 52 von jeweils 4 mm und eine Einschnürungsbreite im mittleren Bereich 56 von beispielsweise 2,5 mm. Das danach folgende Langloch der Düsenöffnung 11' der Düse 10' hat beispielsweise die gleichen Maße wie die vorangegangene Düsenöffnung 9'. Danach folgende Langlöcher von Düsenöffnungen haben beispielsweise eine Langlochlänge 50 von 10 mm, eine Langlochbreite in den Endbereichen 52 von jeweils 4 mm, und eine Einschnürungsbreite im mittleren Bereich 56 von beispielsweise 2 mm.The third slot 9 'of the third nozzles 8' in the liquid feed direction 24 has, for example, a slot length 50 of 10 mm, a slot width in the two end areas 52 of 4 mm each and a constriction width in the central area 56 of, for example, 2.5 mm. The following slot of the nozzle opening 11 'of the nozzle 10', for example, has the same dimensions as the previous nozzle opening 9 '. Thereafter, the following slots of nozzle openings, for example, have a slot length 50 of 10 mm, a slot width in the end portions 52 of 4 mm, and a constriction width in the central region 56 of, for example, 2 mm.

Fig. 3 zeigt eine weitere bevorzugte Ausführungsform eines Düsenrohres 57 der Erfindung, gemäß welcher die Längsachse 58 der Langlöcher von Fig. 2 in Rohrseitenansicht gesehen relativ zur axialen Rohrmittellinie 26 nicht wie in Fig. 2 einen Winkel von 90° einschließt, sondern einen kleineren Winkel β beispielsweise im Bereich zwischen 85° und 50°, bevorzugter zwischen 65° und 75°. Fig. 3 shows a further preferred embodiment of a nozzle tube 57 of the invention, according to which the longitudinal axis 58 of the slots of Fig. 2 seen in tube side view relative to the axial tube center line 26 not as in Fig. 2 an angle of 90 °, but a smaller angle β, for example in the range between 85 ° and 50 °, more preferably between 65 ° and 75 °.

Bei Langlöchern verdreht sich der von ihnen versprühte Sprühstrahlfächer relativ zur Langlochachse 58 um ungefähr 90° um die Sprühstrahlmittellinie.For slots, the spray fan sprayed from them rotates about 90 ° relative to the slot axis 58 about the spray beam centerline.

Fig. 4 zeigt schematisch im Längsschnitt eine Transportspülmaschine nach der Erfindung, bei welcher ein Gruppe von mehreren oberen Sprührohren 2 oder 42 oder 57 gemäß der Erfindung mit ihren Düsen nach unten gerichtet angeordnet sind und eine untere Gruppe von Sprührohren 2 oder 42 oder 57 nach der Erfindung mit ihren Düsen nach oben gerichtet angeordnet sind. Das Spülgut 60 wird von einer Transportvorrichtung 62 in Transportrichtung 64 durch die Transportspülmaschine 59 transportiert. Am vorderen und hinteren Ende der Sprühzone 66, in welcher sich die Sprührohre 2 bzw. 42 bzw. 57 befinden , sind Vorhänge 68 bzw. 70, z. B. im Form von Gummilappen oder Tuchlappen, angeordnet zur Begrenzung des Klimas in der Sprühzone 66. Bei der dargestellten Sprühzone 66 kann es sich um eine Reinigungssprühzone zum Reinigen von Spülgut oder um eine Klarspülzone zum Klarspülen von Spülgut handeln. Fig. 4 shows schematically in longitudinal section a conveyor dishwasher according to the invention, in which a group of several upper spray tubes 2 or 42 or 57 are arranged according to the invention with their nozzles directed downwards and a lower group of spray tubes 2 or 42 or 57 according to the invention with their Nozzles are arranged directed upward. The washware 60 is transported by a transport device 62 in the transport direction 64 through the conveyor dishwasher 59. At the front and rear end of the spray zone 66, in which the spray tubes 2 and 42 and 57 are located, are curtains 68 and 70, z. B. in the form of rubber cloths or cloth cloth, arranged to limit the climate in the spray zone 66. In the spray zone 66 shown may be a Reinigungssprühzone for cleaning items to be washed or a rinse zone for rinsing dishes.

In Fig. 4 sind zur Vereinfachung der Darstellung die vorstehend beschriebenen Düsen 4 bis 10 und deren Düsenöffnungen 6 bis 11 und die vorstehend beschrieben Düsen 4' bis 10' und deren Düsenöffnungen 5' bis 11' jeweils zusammenfassend mit der Bezugszahl 72 versehen.In Fig. 4 For convenience of illustration, the above-described nozzles 4 to 10 and their nozzle openings 6 to 11 and the above-described nozzles 4 'to 10' and their nozzle openings 5 'to 11' are respectively provided with the reference numeral 72 in summary.

Gemäß der in Fig. 4 gezeigten bevorzugten Ausführungsform der Erfindung sind die Sprührohre 2 (oder 42 oder 57) quer zur Transportrichtung 64 des Spülgutes 60 in einer Sprühzone 66 angeordnet. Bei dem in Transportrichtung 64 ersten oberen Sprührohr 2 (oder 42 oder 57) der Sprühzone 66 sind die Düsenöffnungen 72 abweichend von der Vertikalrichtung 76 in Transportrichtung 64 schräg nach vorne gerichtet, wie dies durch einen Pfeil 78 schematisch dargestellt ist. Bei dem in Transportrichtung 64 letzten oberen Sprührohr 2 (oder 42 oder 57) der Sprühzone 66 sind die Düsenöffnungen 72 abweichend von der Vertikalrichtung 76 entgegen der Transportrichtung 64 schräg nach hinten gerichtet, wie dies durch einen Pfeil 80 schematisch dargestellt ist. Die dem ersten Sprührohr und dem letzten Sprührohr benachbarten Sprührohre können in gleicher Weise, jedoch vorzugsweise weniger weit, schräg ausgerichtet sein. Fig. 4 zeigt eine Ausführungsform, bei welcher die Düsenöffnungen 72 der zwischen den äußeren oberen Spülrohren angeordneten mittleren Sprührohre 2 (oder 42 oder 57) in Vertikalrichtung 76 ausgerichtet sind. Die Sprührohre 2 (oder 42 oder 57) der unteren Sprührohre können alle entsprechend Fig. 4 vertikal ausgerichtet sein oder ihr erstes Sprührohr und ihr letztes Sprührohr können entsprechend der oberen Sprührohrgruppe leicht gedreht sein, so dass ihre Düsenöffnungen 72 schräg zur Vertikalrichtung 76 in Richtung zur Mitte der Sprühzone 66 hin gerichtet sind, ähnlich wie die Pfeile 78 und 80 der vorderen und hinteren oberen Sprührohre.According to the in Fig. 4 shown preferred embodiment of the invention, the spray pipes 2 (or 42 or 57) are arranged transversely to the transport direction 64 of the washware 60 in a spray zone 66. In the first upper spray tube 2 (or 42 or 57) of the spray zone 66 in the transport direction 64, the nozzle openings 72 are directed obliquely forward in the transport direction 64, unlike the vertical direction 76, as schematically illustrated by an arrow 78. In the last upper spray tube 2 (or 42 or 57) of the spray zone 66 in the transport direction 64, the nozzle openings 72 deviate from the vertical direction 76 are directed counter to the transport direction 64 obliquely backwards, as schematically represented by an arrow 80. The spray pipes adjacent to the first spray pipe and the last spray pipe can be oriented obliquely in the same way, but preferably less so. Fig. 4 shows an embodiment in which the Nozzle openings 72 of the intermediate spray pipes 2 (or 42 or 57) arranged between the outer upper flush pipes are aligned in the vertical direction 76. The spray tubes 2 (or 42 or 57) of the lower spray tubes may all be correspondingly Fig. 4 be vertically aligned or their first spray tube and their last spray tube may be slightly rotated according to the upper spray tube group, so that their nozzle openings 72 are directed obliquely to the vertical direction 76 toward the center of the spray zone 66, similar to the arrows 78 and 80 of the front and rear upper spray pipes.

Fig. 5 zeigt schematisch eine Stirnansicht der Transportgeschirrspülmaschine von Fig. 4, bei welcher aus einem Tank 82 Flüssigkeit mittels einer Pumpe 84 zu den Sprührohren 2 (oder 42 oder 57) gefördert wird. Fig. 5 schematically shows an end view of the transport dishwasher of Fig. 4 in which liquid is conveyed from a tank 82 by means of a pump 84 to the spray pipes 2 (or 42 or 57).

Claims (11)

  1. Spray pipe (2; 42; 57) of a conveyor ware washer for spraying items to be washed with liquid, comprising a plurality of nozzles (4, 6, 8, 10; 4', 6', 8', 10'; 72), which are arranged one behind another in the longitudinal direction of the pipe, and an inlet (12), from which liquid can flow in the longitudinal direction of the pipe to the nozzles, characterized in that, at least in the case of two nozzles one following another in the liquid supply direction (24), the nozzle located closer to the inlet (12) has a nozzle opening with a larger opening cross section than the nozzle adjacent to it further away from the inlet (12).
  2. Spray pipe according to Claim 1, characterized in that the nozzle opening (5, 7, 9, 11; 5', 7', 9', 11') of at least the nozzle (4; 4'; 72) located closest to the inlet, preferably of two or more nozzles located successively closest to the inlet, has an outlet direction (14, 16, 18) which extends obliquely in the opposite direction to the liquid supply direction (24) seen from the inlet (12) to the nozzles at an angle of inclination (α), the angle of inclination (α) being defined between the outlet direction (14, 16, 18) of the nozzle opening and a theoretical transverse plane (22) which extends at right angles to the liquid supply direction (24).
  3. Spray pipe according to Claim 2, characterized in that the nozzle opening of at least two successive nozzles is inclined obliquely in the opposite direction to the liquid supply direction (24), the angle of inclination (α) of the following nozzle being smaller than the angle of inclination of the preceding nozzle.
  4. Spray pipe according to one of the preceding Claims 2 and 3, characterized in that at least one or preferably a number of nozzles (10; 10'), the nozzle opening (11; 11') of which is not inclined but extends at right angles to the liquid supply direction (24), follow in the liquid supply direction (24) the at least one nozzle (4, 6, 8; 4', 6', 8') which has an inclined nozzle opening.
  5. Spray pipe according to one of the preceding Claims 2 to 4, characterized in that the nozzles, at least the nozzles with an inclined nozzle opening, are arranged in a recess (30) of the outer surface of the spray pipe.
  6. Spray pipe according to one of the preceding claims, characterized in that the nozzle openings (5', 7', 9', 11') are elongated holes.
  7. Spray pipe according to Claim 6, characterized in that the longitudinal axis (58) of the elongated holes, seen in a top view of the spray pipe, encloses an angle with the axial pipe centre line (26) which is 90° or preferably smaller than 90°, preferably lying between 80° and 50°, more preferably between 75° and 65°.
  8. Spray pipe according to Claim 6 or 7, characterized in that the elongated holes have in the central region of their longitudinal extent a constriction (44) where the nozzle opening has a smaller width than in each of the adjacent end regions (46, 48).
  9. Conveyor ware washer, characterized by at least one spray pipe (2; 42; 57) according to at least one of the preceding claims in a spray zone (66), preferably in a cleaning zone, for spraying liquid onto the items to be washed.
  10. Conveyor ware washer, in which a number of upper and/or a number of lower spray pipes (2; 42; 57) are arranged at right angles to the ware conveying direction (64) in at least one spray zone (66), at least one of these spray pipes being designed according to at least one of the preceding Claims 1 to 8, characterized in that in the case of the first upper and/or first lower spray pipe (2; 42; 57) of the spray zone (66) in the ware conveying direction (64), the nozzle openings (72) are, deviating from the vertical direction (76), inclined obliquely forwards in the ware conveying direction (64), and/or in the case of the last upper and/or last lower spray pipe (2; 42; 57) of the spray zone (66) in the ware conveying direction (64), the nozzle openings (72) are, deviating from the vertical direction (76), directed obliquely backwards counter to the ware conveying direction (64).
  11. Conveyor ware washer according to Claim 10, characterized in that further spray pipes, in which the nozzle openings (72) are directed vertically, are arranged between the first and last upper spray pipes and/or the first and last lower spray pipes.
EP06001167A 2005-04-02 2006-01-20 Conveyor-type warewasher and spraying tube for same Expired - Fee Related EP1707100B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005015156A DE102005015156A1 (en) 2005-04-02 2005-04-02 Transport dishwashing machine and spray pipe for it

Publications (3)

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EP1707100A2 EP1707100A2 (en) 2006-10-04
EP1707100A3 EP1707100A3 (en) 2007-08-29
EP1707100B1 true EP1707100B1 (en) 2009-09-30

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EP06001167A Expired - Fee Related EP1707100B1 (en) 2005-04-02 2006-01-20 Conveyor-type warewasher and spraying tube for same

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US (1) US7621286B2 (en)
EP (1) EP1707100B1 (en)
CN (1) CN1839747B (en)
BR (1) BRPI0601109A (en)
CA (1) CA2537543C (en)
DE (2) DE102005015156A1 (en)

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Also Published As

Publication number Publication date
DE502006004954D1 (en) 2009-11-12
CN1839747A (en) 2006-10-04
CA2537543A1 (en) 2006-10-02
EP1707100A3 (en) 2007-08-29
US20060219820A1 (en) 2006-10-05
CA2537543C (en) 2009-12-01
BRPI0601109A (en) 2006-12-05
EP1707100A2 (en) 2006-10-04
DE102005015156A1 (en) 2006-10-05
CN1839747B (en) 2010-05-12
US7621286B2 (en) 2009-11-24

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