ES2310399T3 - INDUSTRIAL DISHWASHER WITH AN IMPROVED HYDRAULIC CIRCUIT. - Google Patents

Abstract

An industrial dishwasher includes a first lower rack (1), upper and lower wash sprinklers (2, 3) fed by a wash pump (4) through respective wash ducts, upper and lower rinse sprinklers (9, 10) fed through respective rinse ducts with hot water coming from a heater (8), two valves (13, 14) located in the wash tank and respectively connected to the upper ducts of the wash and rinse circuits, as well as a second upper rack (1') provided underneath with a relevant support system that carries an additional wash sprinkler (15) and an additional rinse sprinkler (16) provided with respective ducts (17, 18) suitable for connection of the additional sprinklers (15, 16) to said valves (13, 14) when the second upper rack (1') is introduced in the wash tank. In this way, it is possible to carry out the wash of cups and glasses in absolute safety, since the addition of a third sprinkler implies a decrease of the flow rate and pressure of the sprinklers by approximately 30%, and there is obtained a greater efficiency and flexibility of use of the dishwasher since in a single wash cycle it is possible to double the load of cups and glasses with respect to a conventional industrial dishwasher.

Description

Industrial dishwasher with a circuit improved hydraulic

The present invention relates to a industrial dishwasher and in particular to a dishwasher with a improved hydraulic circuit for the purpose of better operation of the machine when washing cups and glasses.

It is known from US 2637595, identified as the closest prior art, that the industrial dishwashers used in the professional field (restaurants, bars, etc.) are able to wash dishes in times extremely small, thanks to some features constructive that make them different from dishwashers Domestic in various aspects. In particular, thanks to the presence of two different washing and rinsing circuits each one of them provided with its own sprinklers, the wash water it is sprayed on the plates by a washing pump and during the rinse a part of this water is replaced by water to rinse previously heated in a heater and fed to a rinse circuit by means of a suitable rinse pump.

In addition, the rinse water is heated previously in the heater at 80-85ºC, the dishes are willing at a significant mutual distance to allow optimal washing from both above and below, wash sprinklers have high flow and pressure and are provided with a single support rack for dishwashing.

All these features make the industrial dishwashers are very effective in washing dishes and the like, but they are not very effective in washing cups, glasses and other crockery smaller and more delicate than the dishes.

In fact, since the flow rate and pressure of the sprinklers are high since they are set to wash dishes, can be excessive to wash cups, cups and similar causing them to fall or break. In addition, since this type of crockery is shorter than the dishes it is clear that the Available deposit volume is not properly exploited in height.

Therefore the object of the present invention is to provide an industrial dishwasher that exceeds those disadvantages This object is achieved by means of a dishwasher industrial equipped with a hydraulic circuit that includes two valves placed in the wash tank and connected to the circuit wash and rinse circuit respectively, as well as a second plate support rack that carries two sprinklers with respective conduits for connection to said valves. Other Advantageous features of the present industrial dishwasher are set forth in the dependent claims.

The main advantage of the dishwasher according with the present invention it is that they can carry out the washing of cups and cups with absolute safety, since the addition of a third sprayer without any intervention in the wash pump It implies a reduction of the flow and the pressure of the sprinklers in about 30%.

An additional advantage of this dishwasher is the greater performance and flexibility of use, since in a single wash cycle is possible to double the load of cups and cups with respect to a conventional industrial dishwasher.

These and other advantages and characteristics of the industrial dishwasher according to the present invention is they will clearly show for those experts in the technique from the following detailed description of two embodiments thereof, with reference to the drawings attachments in which:

Figure 1 is a schematic side view that shows a dishwasher according to the invention during a dishwashing cycle;

Figure 2 is a schematic side view that show the dishwasher mentioned above during a cycle of washing cups and glasses, with a second support grid of dishes that doubles the carrying capacity;

Figure 3 is a schematic front view that shows a first embodiment of the support system for the second plate support grid;

Figure 4 is a schematic side view of the dishwasher according to the previous figure that shows how the second plate support rack is removed out of the tank to bring it to the loading or unloading position;

Figure 5 is a schematic front view that shows a second embodiment of the support system for the second plate support grid; Y

Figure 6 is a schematic side view of the dishwasher according to the previous figure showing how the second plate support rack is removed out of the tank to bring it to the loading or unloading position.

With reference to figures 1 and 2, it is observed that an industrial dishwasher according to the present invention conventionally includes a plate support rack 1, in the which dishes are washed by top wash sprinklers and bottom 2 and 3, respectively, powered by a wash pump 4 through respective washing ducts 5 and 6. At the end of the washing phase, rinsing is carried out by opening valve 7 so that the water from the network enters the heater 8 and feeds upper and lower rinse sprayers 9 and 10, respectively, through the respective rinse lines 11 and 12. It should be noted that the rinse sprayers also they can be fed by a suitable rinse pump and that excess water is drained by a drain pump (not illustrated).

A first novel aspect of the dishwasher industrial according to the present invention is the presence of two valves 13 and 14 placed in the wash tank, preferably in the center of the back wall and respectively connected to conduits 6 and 12 of the circuits of the washed and rinsed When the deposit contains only one plate support rack 1, as shown in figure 1, valves 13 and 14 close and the dishwasher works the same than a dishwasher of the prior art.

A second novel aspect of the dishwasher above is the presence of a second support grid of 1 'plates that carry two washing sprinklers underneath and cleared 15 and 16, respectively, with the respective ducts 17 and 18 for connection to said valves 13 and 14, as shown in figure 2. In other words, when the grid is introduced 1 'upper plate holder in the wash tank, the ducts 17, 18 reach and open valves 13, 14, respectively, so sprinklers 15, 16 are fed by water pump 4 and heater 8.

Since the flow rate and water pressure fed by the latter is independent of the presence of the 1 'upper plate support rack, adding the additional sprinklers 15, 16 to conventional sprinklers 2, 3, 9 and 10 results in a reduction of the flow rate and pressure of the wash jets as explained in the introductory part, thereby achieving the object of a less aggressive wash and Safer for cups and glasses. In addition, it is clear that the volume of the deposit is fully exploited thanks to the presence of the 1 'upper plate support rack that doubles the capacity of dishwasher load and increases washing performance.

Figures 3 and 4 show a first form of realization of the support system of the support grid of upper plates 1 ', which is provided with a support structure lower constituted by a plurality of uprights 19 and so minus a crossbar 20 to which the sprinklers 15, 16 are fixed with the respective ducts 17, 18. In a very simple way, when the user also wants to introduce the plate support grid top 1 'in the dishwasher is enough to place it on the lower plate support rack 1, obviously after Having loaded the latter.

This arrangement is very simple and cheap, without however it involves the simultaneous introduction or extraction of both 1, 1 'plate support racks and requires removal of the 1 'upper plate support rack for loading or discharge of the lower plate support grid 1.

In order to overcome these disadvantages, the second embodiment illustrated in figures 5 and 6 provides still a crossbar 20 'to which the sprinklers 15, 16 are fixed with the respective ducts 17, 18, but said crossbar 20 'is provided with a pair of lateral guides 21 that slide on wheels of support 22 mounted on the sides of the tank. In this way, the two 1, 1 'plate support racks can be moved to loading or unloading operations independently one of the other. In addition, to facilitate loading or unloading operations of the upper plate support grid 1 ', the latter is also can make removable support structure 20 ', 21.

It should be noted that although valves 13 and 14 they are described as flap valves placed in the center of the rear wall of the tank, it is possible to adopt other valve arrangements both as regards the type of valves and their position in the tank, as long as the connection of conduits 17, 18 to conduits 6, 12, respectively, is achieved automatically by introducing the grid  1 'upper plate support inside the tank.

Claims (5)

1. Industrial dishwasher and includes a washing tank suitable for receiving a dish support grid (1) in which the dishes are washed by upper and lower washing sprinklers (2, 3) fed by a washing pump (4) through respective wash ducts (5,6) and then rinsed by upper and lower rinse sprayers (9, 10) fed through respective rinse ducts (11, 12) with hot water that comes from a heater ( 8), characterized in that it additionally includes two valves (13, 14) placed in said washing tank and respectively connected to the upper ducts (6, 12) of the washing and rinsing circuits, as well as a second dish support grid upper (1 ') provided below a relevant support system that carries an additional wash sprayer (15) and an additional rinse sprayer (16) provided with respective ducts (17, 18) suitable for the connection of said additional sprinklers (15, 16) to said valves (13, 14) when said second upper plate support rack (1 ') is introduced into the wash tank. 2. Industrial dishwasher according to claim 1 characterized in that the valves (13, 14) are placed in the center of the rear wall of the washing tank. 3. Industrial dishwasher according to claim 1 or 2 characterized in that the valves (13, 14) are flap valves. 4. Industrial dishwasher according to any of the preceding claims characterized in that the support system of the upper plate support grid (1 ') consists of a support structure consisting of a plurality of uprights (19) and at least one crossbar ( 20) to which the sprinklers (15, 16) are fixed with the respective ducts (17, 18) said support structure being suitable to be mounted on the upper part of the lower plate support grid (1). 5. Industrial dishwasher according to any of claims 1 to 3 characterized in that the support system of the upper plate support grid (1) includes a crossbar (20), to which the sprinklers (15, 16) are fixed with the respective ducts (17, 18), provided with a pair of lateral guides (21) that slide on wheel supports (22) mounted on the sides of the washing tank.