Apparatus for making and dispensing slush-type beverages

Abstract: A highly hygienic machine (1) for producing and dispensing still and carbonated crushed-ice or slush-type products comprises a base (2) for accommodating conventional operating elements above which at least one tank (3) for containing the slush-type products ready for consumption is installed; the tank is provided with a dispenser tap (3a), is hermetic and can be hermetically connected to pressurization means (4) and to pre-cooling elements (5) for volumes of still or carbonated beverages.

Description: The present invention relates to a highly hygienic machine for making and dispensing still and carbonated crushed-ice or slush-type products. Conventional machines making and dispensing slush-type products to consumers are well known and are usually installed in public concerns; they essentially consist of a box-like frame supporting and containing the elements adapted to prepare the slush-type product; a usually transparent tank, in which the prepared slush-type product is kept mixed and ready for consumption, is installed above this frame. These transparent tanks suffer drawbacks, including the poor hygiene that they offer as a whole due to their constructive structure, which practically places in direct contact with the environment the tanks containing the product designed for consumption, and the necessity for long and troublesome operations for periodically cleaning the tanks, which entails stopping the machines completely. These periodic cleaning operations must further be repeated frequently because conventional tanks tend to retain clearly visible marks of the levels reached each time by the slush-type products every time the level lowers due to dispensing. As a whole, conventional machines are therefore unappealing for consumers and significantly limit their demand for the product. A machine according to the preamble of claim 1 for producing and dispensing a semifrozen comestible is disclosed in US-A-3 642 174. The aim of the present invention is to solve the above-noted problems of the prior art by providing a highly hygienic machine for producing and dispensing still and carbonated crushed-ice or slush-type products which allows to avoid the formation of unaesthetic level lines in the containment tank, allows rapid and easy cleaning of said tank and assuredly isolates the contents of the tank from any external manipulation. This aim and other objects are achieved by a highly hygienic machine for producing and dispensing still and carbonated crushed-ice or slush-type products, comprising the features set forth in claim 1. Further characteristics and advantages will become better apparent from the following detailed description of a preferred embodiment of a highly hygienic machine for producing and dispensing still and carbonated slush-type products, illustrated only by way of non-limitative example in the accompanying drawing, wherein the only figure is a schematic view of the present invention. With reference to the figure, the reference numeral 1 designates a highly hygienic machine for producing and dispensing still and carbonated slush-type products. The machine 1 is essentially composed of a base 2 which accommodates the conventional operating elements and a refrigeration system, not shown in the drawings, above which at least one tank 3 is installed for containing slush-type products ready for consumption; this tank is hermetic and hermetically connectable to pressurization means 4 and to pre-cooling elements 5 for still or carbonated beverages. The tank 3 is also associable, in a modular fashion, with other identical tanks in order to compose batteries for individual machines 1 for making and dispensing slush-type products in a plurality of flavors, and can further be inspected visually from outside, since it can preferably be produced using transparent material such as glass or plastics for food use. Means 6 for constantly measuring the level of the slush-type product are installed inside the tank 3, and the tank is connected to the pressurization means 4 and to the pre-cooling elements 5 for the still or carbonated beverages by means of at least two hermetic and separate pipes 7 and 8 which are mutually circuitally parallel; a first one of these pipes, specifically the one designated by the reference numeral 7, directly connects the pressurization means 4 to the hermetic tank 3, while the second pipe 8 mutually connects, in a serial arrangement, the pressurization means 4 and the pre-cooling elements 5 to the hermetic tank 3. Upstream of the pre-cooling elements 5 there is at least one reservoir 10 for containing the still or carbonated beverages; this reservoir also is hermetic and is provided with at least one pair of ports, respectively an inlet port 10a and an outlet port 10b for the second pipe 8. One-way valve means 11 are fitted on said first and second pipes 7 and 8; moreover, at least on the first pipe 7 there is a control valve means 12 and a safety vent valve means 12a, preferably of the type with two intervention thresholds which can be preset to mutually different maximum values. In turn, a valve means 13 is fitted on the second pipe 8, downstream of the pre-cooling elements 5, and repeatedly acts as a dispenser of volumes of still or carbonated beverages; its activation is controlled by each request of said means 6 for detecting the level of slush-type product in the tank 3. In the preferred embodiment of the machine 1, the pressurization means 4 are constituted by at least one gas, particularly carbon dioxide, which is conventionally contained in a cylinder 14 from which both the first pipe 7 and the second pipe 8 extend. Nonetheless, these pressurization means 4 can also be constituted, in an alternative embodiment of the machine 1 not shown for the sake of simplicity and only as regards their propulsive function, by at least one pump which is connected, however, only to the inlet of the second pipe 8. The presence of the pressurization means 4, however, is necessary because they maintain a constant pressure in the hermetic tank 3. The pre-cooling elements 5 are constituted by at least one refrigeration means 15 which is crossed by the second hermetic pipe 8 and is provided with a presettable thermostatic adjustment. Finally, the means 6 for detecting the level of slush-type product are constituted by a pair of probes 16 for detecting a minimum level and a maximum level of slush-type product in the hermetic tank. It is noted that in the above description the constructive aspects of the one-way valve means 11, of the control and safety vent valve means 12, 12a and of the dispenser valve means 13 have not been specified in detail since they are of a type which is known to the skilled in the field. The operation of the invention is as follows: when the machine 1 is activated, the two probes 16 activate the opening of the dispenser valve means 13 fitted on the second pipe 8, which allows the passage of a volume of still or carbonated beverage that arrives from the reservoir 10 and is precooled by passing through the refrigeration means 15. The carbon dioxide that is contained in the cylinder 14 keeps both the inside of the hermetic tank 3 and the reservoir 10 under pressure. The conventional means contained in the base 2 of the machine 1 convert the volume of beverage that has entered the tank 3 into the icy mass that actually constitutes the slush-type product. Each time an amount of the slush-type product is dispensed through the tap 3a, the drop in level is detected by the probes 16 which, once they have reached a presettable minimum value, actuate the reopening of the dispenser valve means 13, which restores the level to the preset value, keeping substantially constant the volume of slush-type product inside the hermetic tank 3. The beverage that determines the flavor of the slush-type product reaches the tank, as mentioned; the beverage is propelled into the tank 3 through the pipe 8 under the action of the pressure supplied by the carbon dioxide dispensed by the cylinder 4. The tank 3 is fully hermetic and transparent and thanks to these particular characteristics it allows to maintain the carbonation of the beverage that has entered it although it passes from the liquid state to the semisolid state (slush) and to display externally the product contained therein, thus increasing the customer attraction factor. On the first pipe 7, the safety vent valve means 12a intervene if the pressure of the carbon dioxide exceeds the maximum values that have been preset for the proper operation of the machine 1, venting part of it externally until safety conditions are reestablished. The one-way valve means 11 prevent any reverse flow of gas and syrup inside the pipes 7 and 8. The operation of the invention is similar for conventional slush-type products, i.e. non-carbonated ones, the only difference being that the carbon dioxide propels the still beverage into the tank 3. In practice it has been observed that the above-described invention achieves the intended aim and objects, i.e. it allows to make and dispense slush-type products with maximum hygiene. The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept; thus, for example, the still or carbonated beverage can also arrive directly from a conventional so-called "post-mix" system, by connection to the pipe 8. All the details may further be replaced with other technically equivalent ones. In practice, the materials employed, as well as the shapes and the dimensions, may be any according to requirements without thereby departing from the subject-matter of the appended claims. This application claims priority from Italian Patent Application No. MO99A00206. Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims: A machine (1) for producing and dispensing still and carbonated crushed-ice or slush-type products, comprising: at least one hermetic tank (3) for containing the crushed ice or slush-type products ready for consumption, said tank (3) being provided with a dispenser tap (3a), pressurization means (4), and pre-cooling elements (5) for cooling volumes of still or carbonated beverages, characterized in that it further comprises a base (2) for accommodating conventional operating elements, said tank (3) being transparent and installed above said base (2), and in that said pressurization means (4) is connected directly through a first hermetic pipe (7) to said tank and consists of at least one gas constituted by carbon dioxide contained in a conventional cylinder (14) or at least one pump/pumping unit. The machine according to claim 1, characterized in that when is use said tank (3) is connectable, in a modular fashion, with other identical tanks (3) to provide a battery of tanks (3) for the machine (1) for making and dispensing slush-type products in multiple flavors. The machine according to claim 1, characterized in that said transparent tank (3) is visually inspectable from outside. The machine according to claim 1, further comprising means (6) for detecting the level of slush-type product inside said tank (3). The machine according to claim 1, further comprising a second hermetic pipe (8) for connecting, in a serial arrangement, said tank (3), said pre-cooling elements (5) or conventional mixing systems of post-mix units, and said pressurization means (4) for the still or carbonated beverages. The machine according to claim 5, characterized in that said first (7) and second (8) hermetic pipes are provided mutually circuitally parallel. The machine according to claim 6, comprising, upstream of said pre-cooling elements (5), at least one hermetic reservoir (10) for containing the still or carbonated beverages said hermetic reservoir comprising at least one pair of ports (10a, 10b), respectively, for the inlet and outlet of said second pipe (8). The machine according to claim 6, characterized in that it comprises one-way valve means (11) installed on said first (7) and second (8) pipes. The machine according to claim 8, characterized in that it comprises control and safety vent valve means (12, 12a) fitted on said first pipe (7). The machine according to claim 9, characterized in that said safety vent valve means (12a) is of the type with two intervention thresholds which can be preset to mutually different maximum values. The machine according to claim 8, characterized in that it comprises a valve means (13) for repeatedly dispensing volumes of still or carbonated beverages installed on said second pipe (8), downstream of said pre-cooling elements (5) that is controlled by said means (6) for detecting the level of slush-type product in said tank (3). The machine according to claim 6, characterized in that said first and second pipes (7, 8) branch out from said conventional cylinder (14). The machine according to claim 6, characterized in that said at least one pump/pumping unit is connected to the inlet of said first and second pipes (7, 8). The machine according to claim 6, characterized in that said pre-cooling elements (5) are constituted by at least one refrigeration means (15) through which said second hermetic pipe (8) passes and which is provided with a presettable thermostatic adjustment. The machine according to claim 4, characterized in that said means (6) for detecting the level of slush are constituted by two pairs of probes (16) for detecting a minimum level and a maximum level of slush in said hermetic tank (3). The machine according to claim 9, characterized in that said control valve means (12) is constituted by at least one pressure-controlled switch installed on said first pipe (7).

Inventors: GRAMPASSI MASSIMO, GRAMPASSI, MASSIMO
Applicants: SPM DRINK SYSTEMS SRL
Application year: 2000
Main classification: B67D1
IPC codes: B67D1