PROCEDURE FOR DISHWASHING AND DISHWASHING MACHINE FOR THE SAID PROCEDURE

Abstract: Fordishwashing in a machine the utensils (2), porcelain and cutlery, desired washed up are placed in a washing cabinet (1) and flushed first with hot lye and later with hot rinse water. The lye from the cabinet (1) is redirected to a lye container (3) passing a filter (9) in a first flow direction. After finished flushing of the utensils (2) the lye is discharged by passing the filter (9) in the opposite direction, and the rinse water from the cabinet (1) is directed to the lye container (3). The filter is made up of a vertical tube (9) having holes in the tube walls dimensioned to the desired filtration effect. The said tube is leading from the bottom of the washing cabinet (1) through the lye container (3) and on to the discharge outlet of the machine, where the tube can be closed by means of a valve (10). Hereby could be used a very small amount of lye, as the lye is discharged after each washing carrying the particles along which during the flushing have been stuck in the filter. It is not required to preflush the utensils.

Description: ProcβdTirβ for diahvaahing and diahwaahing.Machine far the _*id prooedar β The invention relates to a procedure for dishwashing in a machine of the character speci ied in claim 1. In case of electronic dishwashing in kitchens of restau¬ rants, canteens or similar places with a great number of por¬ celain and cutlery items to be washed up, the washer will usually hold from 50 " to 1001 of lye. This lye which is heated to 50-60 degrees C is by way of a pumping system conveyed from a lye container on to a nozzle jet arrangement in a washing cabinet, where tableware and cutlery is showered from 0,5 to 10 minutes by low pressure varying from 0,5 to 1,5 kg/cm . From the washing cabinet the lye is redirected.through a ϋilter back to the lye container. Cutlery and porcelain are now flushed with rinse water, 80-90 degrees C hot, in a volume of 3 to 8 1. The rinse water is led from the washing cabinet to the lye container causing a slow replacement of the lye. This replacement of the lye is, however, a slow process and after 10 to 20 washings the liquid will be so dirty that the clean rinse. ater cannot flush the utensils totally clean. All the lye must then be renewed. . The filter straining the lye will moreover readily tend to choke, especially if the utensils have not been thoroughly preflushed. It is according to the invention suggested that the lye after the finished flushing of the utensils is discharged by passing the filter in the opposite direction, and that the rinse water from the cabinet is passed on to the lye container. By this procedure the aggregate amount of lye is consider¬ ably less than otherwise known from conventional procedures, i.e. same quantity from 6 to 101 as that of the rinse water. On the other hand the sprinkler pressure applied is higher than ordinarily used pressure, viz. from 4 to 5 kg/cm . This quan¬ tity will be sufficient when the lye is discharged after each wash and will remove the particles which during the flushing have stuck in the filter. In this manner the filter will be sel -cleaning, and it is no longer as previously required to preflush the utensils before washing. The invention relates as mentioned likewise to a dishwash¬ ing machine for the exertion of the procedure being of the character specified in claim 2. It is according to the invention proposed that the filter is made up of a vertical tube with holes in the tube wall di¬ mensioned to the desired filtration effect, which said tube from the bottom of the washing cabinet is leading from the lye container to the discharge outlet of the machine, where the tube can be closed by a valve. The invention is in the following described in detail with reference to the drawing showing a vertical section of a dish¬ washing machine. The machine which is built into a not shown housing incor¬ porates -a washing cabinet 1 in-which the utensils 2 intended for cleaning are placed. In the housing is furthermore situat¬ ed a lye container 3 from which hot lye by means of a pump 4 can be directed to a system of nozzles 5 in the cabinet 1 for flushing of the utensils 2, and further a rinse water container 6 from which hot rinse water by way of a second pump 7 can be led to the nozzles 5. The lye container 3 is situated below the bottom drainage 8 of the washing cabinet , From this bottom drainage a ver¬ tical tube 9 is leading downwards through the lye container 3 to a discharge valve 10. In the lye container 3 the walls of the tube are perforated so that liquid from the cabinet, when the discharge valve 10 is closed, is directed to the lye con¬ tainer 3, whereas carried particles e.g. scraps of food are re¬ tained in the interior of the tube 9. The machine functions as follows: By means of the pump4lye is directed from the container 3 to the nozzles 5 in such a manner that the utensils in the wash¬ ing cabinet are showered. From the cabinet the lye is recon- veyed to the container 3 through the holes in the walls of the tube 9, the discharge valve being closed. ¥hen the flushing is finished the valve is opened so that the lye from the container 3 is led into the tube 9 and from there to the discharge outlet of the machine. Hereby the par¬ ticles formerly retained in the tube 9 are carried along, and the filter tube 9 will be cleared. Now the valve 10 is closed, and rinse water is conveyed from the container 6 to the nozzles 5. From the cabinet 1 the water is led to the lye container 3 and detergent added from a dosing pump 11. When insH water is reallowed to the rinse water container from the mains supply, the machine is ready for the next wash, as the rinse water volume equals the content of the lye container, which as seen has been filled during the flushing.

Claims: C l a i m s 1. Procedure for dishwashing in machine by which the utensils (2) porcelain and cutlery desired washed up are placed in a washing cabinet (1) and showered first with hot lye and later with hot rinse " water, in that the lye from the cabinet (1) is redirected to a lye container (3) passing a filter (9) in a first flow direction, c h a r a c t e r i z e d in that the lye after finished flushing of the utensils (2) is dis¬ charged by passing the filter (9) in the opposite direction and that the rinse water from the cabinet (1) is directed to the lye container (3). 2. Dishwashing machine for the exertion of the said pro¬ cedure according to claim 1 and comprising a washing cabinet (1) in which the utensils (2) desired washed up are placed, and further a lye container (3) from which lye by means of a pump (4) is directed to a nozzle arrangement (5) in the cabinet (1), and further a filter (9) through which the lye from the cabinet is redirected to the lye container, c h a r a c t e r i z e d in that the filter is made up of a vertical tube (9) having holes in the tube walls dimensioned to the desired filtration effect, which said tube from the bottom of the washing cabinet (4) is passing through the lye container (3) on to the dis¬ charge outlet of the machine where the tube can be closed by means of a valve (10).

Inventors: KRISTIANSEN JOHANNES ROSDAHL, KRISTIANSEN, JOHANNES, ROSDAHL
Applicants: JEROS MASKINFAB AS, MASKINFABRIKEN JEROS A/S
Application year: 1982
Main classification: A47L15
IPC codes: A47L15