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EP0089994A1 - A continuous dish-washing machine - Google Patents

A continuous dish-washing machine

Info

Publication number
EP0089994A1
EP0089994A1 EP82902994A EP82902994A EP0089994A1 EP 0089994 A1 EP0089994 A1 EP 0089994A1 EP 82902994 A EP82902994 A EP 82902994A EP 82902994 A EP82902994 A EP 82902994A EP 0089994 A1 EP0089994 A1 EP 0089994A1
Authority
EP
European Patent Office
Prior art keywords
dish
machine
washing machine
timer
conveyor
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.)
Withdrawn
Application number
EP82902994A
Other languages
German (de)
French (fr)
Inventor
Claes Göran BOREUS
Gunnar Gilbert Eriksson
Anders Johan Rudolf Andersson
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.)
Electrolux AB
Original Assignee
Electrolux 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 Electrolux AB filed Critical Electrolux AB
Publication of EP0089994A1 publication Critical patent/EP0089994A1/en
Withdrawn legal-status Critical Current

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
    • A47L15/24—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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0047—Energy or water consumption, e.g. by saving energy or water
    • 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
    • A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0052—Noise reduction
    • 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
    • A47L15/247—Details specific to conveyor-type machines, e.g. curtains
    • A47L15/248—Details specific to conveyor-type machines, e.g. curtains relating to the conveyors
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/20—Time, e.g. elapsed operating time
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/28—Conveyor belt parameters, e.g. velocity of conveyor belts
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/32—Stopping or disabling machine operation, including disconnecting the machine from a network, e.g. from an electrical power supply

Definitions

  • the present invention is related to a time control system for the workin process of a continuous dish-washer by which an essential saving of energy can b achieved.
  • Tunnel dish-washers have a conveyor which carries the dish goods through plurality of zones in the longitudinal direction of the machine. It is piorly know to use devices at the conveyor to start and/or stopp the running of the machine a times when the goods is put into or taken out of the machine. If the running i occasionally interrupted or the function of the machine fails, the washing will b insufficient which is first discovered at the re-use of the goods. On the othe hand, the machine can still be running during periods when dish goods for som reason is not remaining in the machine which means losses of energy. By the wa of a more accurate control of the working process it is possible to eliminate suc drawbacks of the machine.
  • the problem to - drive the machine in well determine intervals is solved without the influence of disturbances in the form of e.g. th opening of doors, a stop of the conveyor etc.
  • a sensin member in the input end of the machine will start an electronic timer which onl counts the time when the machine is runnning and is put to zero as soon a another batch of goods comes into the input end. If no more goods will come th machine is stopped after a predetermined time period.
  • several of the zone in the machine are controlled by its own timer which reduces the use of energy to just the zone where, for the time being, dish goods are treated. The properties which thus make an improvement of the dish washer are more closely defined in the characterizing clause of Claim 1.
  • FIG. 1 a vertical projection of a dish-washer according to the invention
  • Fig. 2 a wiring diagramme of an electronic timer in the dish-washer.
  • a conveyor 10 for conveying dish goods on racks essentially horizontally through the machine.
  • a pre-washing zone 11 begins having a tank 12 in the bottom and a circulation system 13.
  • a drain 14 is provided in this zone through which exceeding liquid passes off.
  • the next zone is the detergent washing zone 15 which has a separate
  • the next step is the post-washing zone 1 with a tank 19 having a drain 20 for exceeding liquid which is passed to th pre-washing zone.
  • the tank 19 is a collecting tank for rinsing liquid from th finishing zone 21 which is the final rinse.
  • the spraying system 22 in this zone i supplied via a heater 23 directly from the water mains and rinses then the good with clean, hot water. This is applicable to a three-tank embodiment of th machine. It may also be carried out as a two-tank embodiment which means tha the detergent washing zone and the post-washing zone are merged. After that rack has left the final rinse it is suitably passed to a roller conveyor where th dish goods are self-drying.
  • the timer has i principle the following working mode.
  • a switch 24 at the input of the machine makes a contact when it is actuate by a rack put into the machine and supplies a start signal on a wire 25 to the inpu of an inverter 26 (a Schmitt trigger) which conducts the inverted and into a rea pulse shape converted signal to a counter 27 which in this example is a standar module MC 14541 according to conventional TTL-technics.
  • the properties of thi counter are important in that the counting speed (the pulse frequency) i externally controlled by an adjustable control circuit 28 and that the counter b an interruption in the control stops at a reached number and proceeds therefro when re-started after the interruption.
  • the output 29 of the counter supplies signal during the time the counting proceeds up to a predetermined number an then the signal ceases.
  • the signal is amplified by transistor 30 which supplies a control current to a relay 31 controlling a rela contact 32 which makes the conveyor start and switches in the driving circuit (not shown) of the first zones 11,15 and eventually 18 of the dish-washer.
  • th pulse frequency is adjustable (here by means of a potentiometer 33 in the contro circuit) the period of driving the machine can be synchronized with the conveyin speed of the rack so that the driving ceases at the moment when the rack leave the last zone of that part of the procedure which is controlled by the timer.
  • the above-said interruptions may occur when someone opens a door of th machine or when the conveyor for some reason is blocked. Against i.a. thes events there are safety contacts 34 positioned in the machine. If any one of thos contacts is closed a zero signal is obtained on the output of the inverter 35 t which a number of diods 36 are connected. These d ⁇ ods will then short-circuit th control signals to the transistor and the counter. The effect of this short-circui will be that the counter stops on the number it has reached and the relay falls s that the driving circuits are broken and the goods is stopped. When the safet contact is re-opened the control signal is re-established so that the count proceeds counting from the reached number and the procedure goes on. During th interruption no part of the procedure is excluded as the rack and the spray syste stand still until the driving is taken up again.
  • the control circuits for the final rinse are substantially identical with th now described device and make thus a doubling of the timer in the foregoing.
  • I the diagramme we therefore use the same reference-numbers on the component as before but with the addition of a ⁇
  • the relay contact 32' thus controls drivin circuits for the conveyor and the spray system 22.
  • th counter 27 has reset circuits which set the counter on zero, when another rack i put into the inlet end and actuates the switch 24.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

La commande temporelle de fonctionnement d'une machine à laver la vaisselle en continu permet d'économiser de l'énergie grâce à une division du processus de fonctionnement en plusieurs parties de traitement qui ne durent que pendant le traitement des articles de vaisselle. Les parties de traitement sont commandées par des horloges pourvues de circuits de commande et de circuits de réglage sur zéro pour le réglage du temps de fonctionnement, l'élimination des perturbations provoquées par des interruptions, la remise à zéro en entrant les articles de vaisselle, etc.Time control of operation of a continuous dishwashing machine saves energy by dividing the operating process into several processing parts which last only while the dishware is being processed. The processing parts are controlled by timers provided with control circuits and zero-setting circuits for setting the operating time, eliminating disturbances caused by interruptions, resetting to zero when entering crockery items, etc.

Description

A continuous dish- washing machine
The present invention is related to a time control system for the workin process of a continuous dish-washer by which an essential saving of energy can b achieved.
Tunnel dish-washers have a conveyor which carries the dish goods through plurality of zones in the longitudinal direction of the machine. It is piorly know to use devices at the conveyor to start and/or stopp the running of the machine a times when the goods is put into or taken out of the machine. If the running i occasionally interrupted or the function of the machine fails, the washing will b insufficient which is first discovered at the re-use of the goods. On the othe hand, the machine can still be running during periods when dish goods for som reason is not remaining in the machine which means losses of energy. By the wa of a more accurate control of the working process it is possible to eliminate suc drawbacks of the machine.
By the invention the problem to - drive the machine in well determine intervals is solved without the influence of disturbances in the form of e.g. th opening of doors, a stop of the conveyor etc. At an input of goods a sensin member in the input end of the machine will start an electronic timer which onl counts the time when the machine is runnning and is put to zero as soon a another batch of goods comes into the input end. If no more goods will come th machine is stopped after a predetermined time period. In fact several of the zone in the machine are controlled by its own timer which reduces the use of energy to just the zone where, for the time being, dish goods are treated. The properties which thus make an improvement of the dish washer are more closely defined in the characterizing clause of Claim 1. An example of an embodiment of the invention is described in the following with references to the accompanying drawing which shows in Fig. 1 a vertical projection of a dish-washer according to the invention, Fig. 2 a wiring diagramme of an electronic timer in the dish-washer.
In a continuous dish-washer there is a conveyor 10 for conveying dish goods on racks essentially horizontally through the machine. At the input end a pre-washing zone 11 begins having a tank 12 in the bottom and a circulation system 13. A drain 14 is provided in this zone through which exceeding liquid passes off. The next zone is the detergent washing zone 15 which has a separate
f OMPI tank 16 and a circulation system 17. The next step is the post-washing zone 1 with a tank 19 having a drain 20 for exceeding liquid which is passed to th pre-washing zone. The tank 19 is a collecting tank for rinsing liquid from th finishing zone 21 which is the final rinse. The spraying system 22 in this zone i supplied via a heater 23 directly from the water mains and rinses then the good with clean, hot water. This is applicable to a three-tank embodiment of th machine. It may also be carried out as a two-tank embodiment which means tha the detergent washing zone and the post-washing zone are merged. After that rack has left the final rinse it is suitably passed to a roller conveyor where th dish goods are self-drying.
For the control of the working procedure in the machine it is used a electronic timer according to the wiring diagramme of Fig. 2. The timer has i principle the following working mode.
A switch 24 at the input of the machine makes a contact when it is actuate by a rack put into the machine and supplies a start signal on a wire 25 to the inpu of an inverter 26 (a Schmitt trigger) which conducts the inverted and into a rea pulse shape converted signal to a counter 27 which in this example is a standar module MC 14541 according to conventional TTL-technics. The properties of thi counter are important in that the counting speed (the pulse frequency) i externally controlled by an adjustable control circuit 28 and that the counter b an interruption in the control stops at a reached number and proceeds therefro when re-started after the interruption. The output 29 of the counter supplies signal during the time the counting proceeds up to a predetermined number an then the signal ceases. During the counting the signal is amplified by transistor 30 which supplies a control current to a relay 31 controlling a rela contact 32 which makes the conveyor start and switches in the driving circuit (not shown) of the first zones 11,15 and eventually 18 of the dish-washer. As th pulse frequency is adjustable (here by means of a potentiometer 33 in the contro circuit) the period of driving the machine can be synchronized with the conveyin speed of the rack so that the driving ceases at the moment when the rack leave the last zone of that part of the procedure which is controlled by the timer.
The above-said interruptions may occur when someone opens a door of th machine or when the conveyor for some reason is blocked. Against i.a. thes events there are safety contacts 34 positioned in the machine. If any one of thos contacts is closed a zero signal is obtained on the output of the inverter 35 t which a number of diods 36 are connected. These dϊods will then short-circuit th control signals to the transistor and the counter. The effect of this short-circui will be that the counter stops on the number it has reached and the relay falls s that the driving circuits are broken and the goods is stopped. When the safet contact is re-opened the control signal is re-established so that the count proceeds counting from the reached number and the procedure goes on. During th interruption no part of the procedure is excluded as the rack and the spray syste stand still until the driving is taken up again.
The control circuits for the final rinse are substantially identical with th now described device and make thus a doubling of the timer in the foregoing. I the diagramme we therefore use the same reference-numbers on the component as before but with the addition of a \ The relay contact 32' thus controls drivin circuits for the conveyor and the spray system 22. Of course, it is possible t complete the diagramme with another timer of the same kind as those two whic can control some separate part of the procedure. It may also be noted that th counter 27 has reset circuits which set the counter on zero, when another rack i put into the inlet end and actuates the switch 24. Thus another programme wil start every time a rack is put in independent of the fact that there are, or ar not, racks before in the machine.
The saving of energy as mentioned in the introduction comes about by th sharing of the procedure into several zones, whereby the spray system in th respective zone is working only when dish goods are treated in the zone. As th energy losses contain deliberated moisture and heat conducted to a ventilatio device positioned on the machine, these losses are reduced when the several zone of the machine are used only in short intervals. Another advantage of this sharin of the procedure appears in a lower sound level thanks to the fact that the soun sources are fewer.

Claims

Claims _
1. A continuous dish-washing machine having an inlet end, a conveyor and a outlet end and divided into zones of different treatment of dish goods an provided with a control device which starts the conveyor and driving circuits i the machine on actuation of a sensing member at the inlet end, character i z e d in that the control device is constituted of at least one electronic time (27) provided with a control circuit (28) and adjusting means (33) for the time o operation and a zero setting circuit which by actuation of the sensing member (24 sets the timer on zero.
2. A dish-washing machine according to Claim 1, charaterized in tha some zones in the machine are controlled by one timer and other zones b another.
3. A dish-washing machine according to Claim 1, characterized in that the time of operation is determined by the conveying speed so that th driving ceases when the goods leaves the last zone of the ones controlled by the timer.
4. A dish-washing machine according to Claim 1, characterized in that safety contacts (34) are disposed at doors and/or the conveyor and connected to the control circuit and the driving circuits in a wiring that stops the timer and the machine on actuation of such a contact and re -starts the same from where they stopped when the actuation of the contact ceases.
EP82902994A 1981-10-01 1982-09-23 A continuous dish-washing machine Withdrawn EP0089994A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8105811 1981-10-01
SE8105811A SE8105811L (en) 1981-10-01 1981-10-01 CONTINUOUS DISHWASHER

Publications (1)

Publication Number Publication Date
EP0089994A1 true EP0089994A1 (en) 1983-10-05

Family

ID=20344680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82902994A Withdrawn EP0089994A1 (en) 1981-10-01 1982-09-23 A continuous dish-washing machine

Country Status (9)

Country Link
EP (1) EP0089994A1 (en)
JP (1) JPS58501574A (en)
BR (1) BR8207893A (en)
DK (1) DK235883A (en)
FI (1) FI831919L (en)
IT (1) IT1149371B (en)
NO (1) NO831931L (en)
SE (1) SE8105811L (en)
WO (1) WO1983001187A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922067A1 (en) * 1989-07-05 1991-01-17 Henkel Kgaa METHOD FOR RINSING USES DISHWARE AND DISHWASHER FOR PERFORMING THE METHOD
DE3938755A1 (en) * 1989-11-23 1991-05-29 Henkel Kgaa METHOD FOR CONTINUOUS MACHINE CLEANING OF CLEANING UTENSILS
DE4100164C1 (en) * 1991-01-05 1992-04-30 Deutsche Lufthansa Ag, 5000 Koeln, De
FI96661C (en) * 1994-05-02 2000-11-20 Fuuga Controls Oy Method for washing units in an automatic washing line and automatic washing equipment
DE19644438C2 (en) * 1996-10-25 1998-11-12 Premark Feg L L C N D Ges D St Continuous dishwashing device and method for cleaning crockery and / or tablet parts
DE19829650C2 (en) * 1998-07-02 2000-06-08 Premark Feg Llc Continuous dishwashing device for baskets and method for operating them
FI990487A (en) * 1999-03-05 2000-09-06 Hackman Metos Oy Method of washing units in an automatic washing device and one automatic washing device
DE102004030010A1 (en) * 2004-06-22 2006-01-12 Premark Feg L.L.C., Wilmington Dishwasher operating method and conveyor dishwashing machine
DE102004030003A1 (en) 2004-06-22 2006-01-12 Premark Feg L.L.C. (N.D.Ges.D. Staates Delaware), Wilmington Dishwasher operating method and conveyor dishwashing machine
DE102005015157A1 (en) 2005-04-02 2006-10-05 Premark Feg L.L.C., Wilmington Multitank-transportation dishwasher e.g. tape transportation dishwasher for washing goods, has liquid recirculation device transferring liquid of front cleaning area into rear cleaning area against feeding direction
DE102005035764A1 (en) 2005-07-29 2007-02-01 Premark Feg L.L.C., Wilmington Transporting dishwashing machine has conveyor transporting dishes through washing zones with tanks under it which collect used washing water, which is pumped back to sprays, similar system being used in rinsing zone
US10390675B2 (en) 2015-06-01 2019-08-27 Illinois Tool Works Inc. Warewash machine cleaning notification and in-situ dilution process
DE102015214300A1 (en) 2015-07-28 2017-02-02 Illinois Tool Works Inc. Transport dishwasher and method for operating a conveyor dishwasher

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH403194A (en) * 1963-07-31 1965-11-30 Ed Hildebrand Fa Ing Dish washing machine
CH424120A (en) * 1964-10-02 1966-11-15 Ed Hildebrand Fa Ing Rinse water regulating device for a dishwasher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8301187A1 *

Also Published As

Publication number Publication date
WO1983001187A1 (en) 1983-04-14
DK235883D0 (en) 1983-05-25
IT8249186A0 (en) 1982-09-30
BR8207893A (en) 1983-08-30
SE8105811L (en) 1983-04-02
FI831919A0 (en) 1983-05-30
FI831919L (en) 1983-05-30
NO831931L (en) 1983-05-30
JPS58501574A (en) 1983-09-22
DK235883A (en) 1983-05-25
IT1149371B (en) 1986-12-03

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19830511

AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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Withdrawal date: 19841219

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ERIKSSON, GUNNAR GILBERT

Inventor name: ANDERSSON, ANDERS JOHAN RUDOLF

Inventor name: BOREUS, CLAES GOERAN