Concentrate dosing device for fruit juice dispensers

Abstract: It incorporates a Venturi device located between a sealed tank containing syrup or concentrate (arrow 14) and a water supply source (7) either from the main water supply network or from a tank, plus a depression valve (21) located at the Venturi device inlet which, when the moment comes, introduces air into the circuit and enables the syrup shortage detection (20) and inhibits top up water feed. It may be alternatively regulated through the pressure regulator, the Venturi device, or a combination of both. Enables alternative dispensing using a pouring tap (23), at the same that the maximum (9) and minimum (8) level detectors are substituted by a manually operated lever (22) or push button.

Description: OBJECT OF THE INVENTION The present invention relates to a concentrate dosing device according to the preambles of claims 1 and 4. BACKGROUND OF THE INVENTION There are currently available in the market fruit juice supplying machines of variable nature made up of a supporting base of a transparent recipient fitted with a cover, inside which is arranged the mixture of water and syrup in order to obtain, through their dilution, the desired fruit juice or cold drink. The recipient consists of a transparent inverted dome that houses inside it a turning agitator that maintains the homogeneous suspension, the cover is removable and the mixture which constitution varies as a function of the final product is decanted through the resulting opening of the recipient. The capacity of the recipient varies, according to its manufacturer, between five and fifty litres which makes it advisable, for weight reasons, for the recipient to be continuously refilled by its attendant, dosing the mixtures of syrup with water, through the use of double pumps, piston driven or volumetric, of different flow rates, as well as solenoid valves used to control the flow rates of the different fluids and other mixture regulation means. Let us mention, in respect of the latter, U.S.-A-4 884 720 and in respect of the former, U.S.-A-4 953 754, fitted with volumetric control dispenser. U.S. patent 5000352, which describes devices according to the preambles of claims 1 and 4, held by Robert K. Cleland and the prior one also held by the same person, number 4544084, about Drink Dispensers, incorporate fruit juice dispensers as well as liquid level meters and starting and stopping means for mechanical water and concentrate feeding devices, consisting on a double circuit piston driven pump, independently fed from the respective tank to the drink dispenser or supplier, place where the mixture of both fluids takes place through their interaction and, also, through the action of the juice distribution paddles. These piston driven pumps, which do not effect any mixing, are not at all related with the Venturi object of this patent specification. Indeed, apart from the elimination of mechanical means that require maintenance and that have a cost much greater than that of the Venturi device, the advantage of the latter is that, besides feeding the supplying mechanism, it simultaneously mixes and doses. Whenever no upper tank is fitted, the means used to dispense drinks and similar ones, normally used for the "tap" issue of very well known cold drinks, present as a defect the detection of the empty condition of the concentrate supply tanks, being it common to observe that the serving waiters are the ones usually charged with visually detecting the absence of concentrate in the glass served to the customer, disposing of the simple water contained therein and reloading the contents of the concentrate deposit. Taking all of the above into consideration, the problems derived from the final cost of the doser, the added cost derived from the maintenance of the mechanical elements, of the better preparation of the mixture and prior dosage for the sale of the fruit juice, as well as the perfect regulation of the joint supply of water and concentrate, are solved by the invention as defined in the appended claims. DESCRIPTION OF THE INVENTION The purpose of the invention is to solve the above problems by fitting, to any of the fruit juice dispensers now existing in the market and of whatever make or brand, with means duly guaranteeing the accuracy of the mixture that will produce the fruit juice to be consumed, so as to produce the same aroma, flavour and, above all, degree of viscosity. It is also the purpose of the invention to supply to the fruit juice dispenser water with homogeneous properties so that, irrespectively of where a fruit juice dispenser may be located, as long as it bears a brand name that guarantees the incorporation of the subject of this invention, the consumer will be reassured that the product quality is constant and fully reliable. A further aim of the invention is to prevent manual refill of the recipient, avoiding the need to have a person supplying liquid and keeping product level within limits capable of being automatically regulated, so that the recipient remains full at all times, clearly suggesting to the potential consumer the presence of newly prepared product. All of the above advantages are made possible due to the fact that the development of the object of the invention allows the achievement of the purposes herein pursued. To that end the invention starts off a conventional dispenser made of an inverted dome recipient resting upon a base which, besides the cold generating elements, does also incorporate a cooling expander that penetrates within the inverted dome and, as is already common, a rotational agitating device. This specification shall not deal, given that it is not the purpose of the invention, with a description of the chill production source, with the temperature control means controlling it nor with the constitution of the dispenser itself, given that, as will be made clear further on, they do not affect the additional adaptation of the invention to a dispenser without the own features of the unit adapted being altered but, on the contrary, the maintenance of the liquid at a constant level allows its operation under very good refrigeration conditions. A further important factor to point out is that, by fitting to the cover an air inlet with a filter is not necessary to uncover the dome of the recipient for purposes other than periodic cleaning operations, thus avoiding the possible contamination that may take place during the periodic refilling stages. In accordance with the above, the invention is therefore applied to any dispenser available in the market and presenting the features described in the preambles of claims 1 and 4, the invention basically consisting on the placement of a "Venturi" type assembly between a sealed tank containing fruit syrup and a water supply source supplying water from the supply network or from a tank, so that the water may act as the syrup feeding means by way of a prior adjustment of the Venturi device with constant flow of one liquid or the other, taking the already mixed product or the fruit juice to the dome acting as the dispenser tank and which incorporates two adjustable level detectors. The device used to detect the lack of fruit syrup or concentrate in its tank as it runs out is incorporated into the Venturi supply conduit and works in cooperation with a depression valve located at the entrance of concentrate to this Venturi device, so as to inhibit water supply feed. The purpose of the depression valve is to incorporate air into the circuit, so that it may drag off the last few drops of the product through the short conduit section existing between the concentrate tank and the Venturi, quickly cleaning the pipe and aiding the action of the syrup presence detector, precisely fitted in this section, causing a breach or unbalance of internal pressure which, under other conditions, prevents or at least slows down the action of the detector, in respect of ordering the inhibition of the water feed command. This instantaneous response becomes necessary whenever dispensing means are incorporated into the doser upper area, such as a pouring tap and other conventional modalities as a decanting pump and others to be invented in the future whether they are of the accumulation or direct delivery types in which the tap or its alternative, the push button, may or may not act as simultaneous mechanical and electrical switching elements. The water may come from a treated liquid container tank, in which case the required flow rate is obtained either by gravity or using a pump. Direct water network supply is also appropriate, with the inter-placement of a continuous water treatment unit using osmotic, active coal or other type of filters, together with the inclusion of ion interchanging resins in order to finally obtain deflavoured, odourless and soft water with the required pH level. The processing circuit is a conventional one which may be selected from among those available in the market. It is finally possible to combine the Venturi device with one or several solenoid operated valves, of the conventional product feeding type, for example, further drink components or, simply, carbonic gas coming from an additional tank, in the same way that it may also include whichever conventional cooling or warming means that the product to be dispensed may require. DESCRIPTION OF THE DRAWINGS In order to complete the description being effected and with the purpose of aiding a better and easier understanding of the features of the invention, this patent specification is supported, as integral part thereof, by a set of drawings where, with an illustrative but never limitative character the following has been duly represented: Figure 1 represents the doser object of the invention, being identified therein the components mentioned in this specification. Figure 2 is an example of a tap dispenser, pursuant to that described in this patent specification. Figure 3 represents an automatic dispensing machine, of the type normally called "vending machines", showing the frontal section of the product selection and coin slot mechanisms, as well as the opening where glasses or cups are introduced for the drinks to be dispensed. DESCRIPTION OF A PREFERRED EXECUTION EXAMPLE Example 1. Upon examining the previously mentioned figure 1, it may be observed how the invention herein advanced consists of a concentrate doser for fruit juice dispensing machines, of the type that include an inverted dome (1) resting upon a base (2) which, besides the means used to chill (3) the liquid within the dome (1), does also incorporate a rotating agitator (4), as well as liquid dispensing means such as an outlet pipe under which can be placed a glass to actuate the opening means, a frame (5) wheeled or not, characterized by the dosing device comprising a "Venturi" type assembly between a sealed syrup container, not shown and marked by the arrow (14) and a water supply source (7), either from the water supply network or from a tank, in such a way that the water acts as the syrup dragging mean through a prior adjustment of the Venturi device (6) with a constant flow rate of one liquid or the other, taking the mixed product or fruit juice to the dome (1) that acts as the dispensing tank and which incorporates two level detectors (8-9) which can be adjusted and which establish the maximum and minimum level thresholds (12). It does furthermore incorporate, upstream the Venturi (6) device, and downstream the concentrate tank, a depression valve (21) that introduces into the circuit syrup sweeping air in the conduit portion located between the concentrate tank and the Venturi device (6) whenever the depression required for the instantaneous actuation of the syrup presence level detector (20), incorporated into this portion, is reached, which detector commands through the processor (10) the inhibition of the water feeding command (11) and which acts advantageously upon lack of syrup warning devices. The regulation of the concentrate and water mixture is effected either graduating the regulator (15) without touching the Venturi device (6) or else adjusting the own Venturi device (6), without operating the regulator (15) or, alternatively, both devices may also be simultaneously adjusted, in order to achieve syrup dosing and simultaneously mixing it with water in the Venturi device. The water, pursuant to the example, is supplied from the water supply network, through the inter-placement of a continuous water treatment unit (13) using osmotic, active carbon or other type of filters, together with the inclusion of ion interchanging resins to finally obtain unflavoured and odourless liquid, softening its calcium content with the appropriate pH level, arriving to the Venturi device through a flow rate regulator (15) that ensure dosing accuracy. The syrup comes from a conventional container, of the type fitted with non rigid walls, that receives the product under vacuum and which is fitted with a membrane ready to receive a nozzle that interconnects the container, not shown, to the tank outlet (14) to the previously described circuit in order to dispense the already dosed mixture through the conduit and into the dome (1) fitted with a cover (16) that insulates the liquid (17) from outside. The processor circuit incorporates a transformer-rectifier (18) to convert the alternating current supplied to continuous current and which is plug into the power supply network represented in the drawing by the arrow (19). Example 2. Another execution variant, using a pouring tap (23) (Figure 2) or further conventional variations such as a decanting pump or others, incorporate conventional mechanisms that substitute the maximum (9) and minimum (8) liquid level detectors, by a lever (24) or manually operated push button (25) activated by a coin collection mechanism (26) (Figure 3) which operate, in either case, as power supply circuit breakers, also conventional. Example 3. A further variant combines the Venturi device (6) with one or several solenoid valves (of the conventional type, not shown in the figures), to supply further drink or carbonic gas components. This description is not extended any further on the understanding that any expert in the art would already have enough information to understand the scope of the invention and the advantages derived therefrom, as well as to enable him to reproduce it. It is further understood that, as long as the essential features of the invention are not altered, both the variations in respect of the materials as the shape, size and arrangement of the elements may be varied within the same characteristics.

Claims: Concentrate dosing device for fruit juice dispensers incorporating an inverted dome (1) resting upon a base (2) and comprising refrigeration means for chilling the liquid in the dome, a rotating agitator (4), liquid dispensing means suchs as an outlet pipe under which a glass can be placed in order to actuate opening means and a frame (5), wheeled or not; said dome acting as a dispensing tank and said dispensing tank incorporating two level detectors (8, 9) capable of being adjusted in order to determine the maximum and the minimum level thresholds (12), said dosing device being characterized in that, it comprises a venturi type assembly between the outlet (14) of a sealed concentrate container and a water supply source (7), said source being either the water supply network or a tank, the water flowing through the venturi, sucking the syrup and mixing with it, the mixed product or fruit juice being fed to the dispensing tank, the device further comprises located upstream the venturi and downstream the concentrate container outlet, in order to detect presence of concentrate, a depression valve (21) responsive to vacuum in the concentrate line, said valve (21) allowing ingress of air for sweeping the portion of the concentrate line between the concentrate container and the venturi when a vacuum level is reached sufficient for the instantaneous actuation of a concentrate presence detector (20) incorporated in said portion of concentate line, and said detector commanding through a processor the inhibition of water feed command (11) and acting upon concentrate shortage warning means. Concentrate dosing device according to claim 1, characterized in that the water source is the main water network and a unit (13) is provided that treats the water continously using conventional means, said treated water flows to the venturi device through a flow rate regulator (15) that ensures dosing accuracy, the concentrate or syrup flowing from a conventional container of the type having non rigid walls and which outlet is connected to the line upstream the venturi, the dosed mixture being fed to the dispensing tank (1) which is fitted with an insulating cover. Concentrate dosing device according to claim 2, characterized in that the regulation of the concentrate and water mixture is effected either by graduating the water regulator (15) without touching the venturi or viceversa or by adjusting both the water regulator and the venturi. Concentrate dosing device for fruit juice dispensers incorporating liquid dispensing means suchs as a pouring cap (23) or other dispensing or decanting devices, such as the decanting pump or others, under which a glass can be placed, and a lever (24) that acts as a switch and which acts upon a conventional power supply circuit breaker, said dosing device being characterized in that, it comprises a venturi type assembly between the outlet (14) of a sealed concentrate container and a water supply source (7), said source being either the water supply network or a tank, the water flowing through the venturi, sucking the syrup and mixing with it, the mixed product or fruit juice being fed to the dispensing tank, the device further comprises located upstream the venturi and downstream the concentrate container outlet, in order to detect presence of concentrate, a depression valve (21) responsive to vacuum in the concentrate line, said valve (21) allowing ingress of air for sweeping the portion of the concentrate line between the concentrate container and the venturi when a vacuum level is reached sufficient for the instantaneous actuation of a concentrate presence detector (20) incorporated in said portion of concentate line, and said detector commanding through a processor the inhibition of water feed command (11) and acting upon concentrate shortage warning means. Concentrate dosing device according to claim 4, characterized in that the water source is the main water network and a unit (13) is provided that treats the water continously using conventional means, said treated water flows to the venturi device through a flow rate regulator (15) that ensures dosing accuracy, the concentrate or syrup flowing from a conventional container of the type having non rigid walls and which outlet is connected to the line upstream the venturi, the dosed mixture being fed to the dispensing tank (1) which is fitted with an insulating cover. Concentrate dosing device according to claim 4, characterized in that the regulation of the concentrate and water mixture is effected either by graduating the water regulator (15) without touching the venturi or viceversa or by adjusting both the water regulator and the venturi. Concentrate dosing device according to the prior claims, characterized in that the Venturi device is combined with one or several solenoid valves used to introduce further components into the syrup drink or else carbonic gases.

Inventors: CEPERO ASCASO CARMELO, CEPERO ASCASO, CARMELO
Applicants: CEPERO ASCASO CARMELO, CEPERO ASCASO, CARMELO
Application year: 1995
Main classification: B67D1
IPC codes: B67D3, B67D1, B67D7