DE2100024A1 - Method and device for dispensing a beverage made from water-soluble, pulverulent product, in particular from freeze-dried milk coffee - Google Patents

Description

Please Wt TAMWVITF 8902 AUGSBURG-GÖGGINGEN. the

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DR. ING. E. LIEBAU Our colliery C 8169

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DIPLING. G. UEBAU

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Coffee Corporation S.A.

Rue Notre Dame, 37, Luxembourg / Luxembourg

Procedure and device for dispensing a beverage from water-soluble, powdery product, in particular from freeze-dried milk coffee

The preparation of a drink, for example a cup of coffee, from a powder, which is achieved by adding something soluble in warm water is a simple process. When making a cup of coffee using a sealed sachet containing the correct dose of freeze-dried latte (i.e. a powder that by dehydrating the beverage obtained, for example, from bar beverage machines, by freezing dry at low temperature and kept in the absence of air until use. After this When the bag is opened, its contents are poured into a cup or a suitable cup is made before pouring Amount of water entered, sweetened and mixed.

This happens in detail - depending on the habits, the Taste, require ions, care and finally

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depending on the type of person preparing the drink.

The sale of the sealed pouches is not followed by a technical problem, but this changes when the drink is ready prepared for tasting by an unspecified public, for example in public bars or in coin-operated machines shall be.

In the latter cases, if a new product is to be brought onto the market, the most important thing is sympathy the audience is awakened and in this the "taste" for the new drink is formed. So that this can happen the drink offered must be "determined", i.e. have constant organoleptic properties, because the consumer adjusts to the particular "taste" and in this the expectation is aroused that he is the taste direction finds again. This consistency is therefore a necessary condition for the product to achieve the Retains favor with customers. The phenomena that characterize the wines are almost repeated here have determined and are still determining.

The technical problem to be solved results from this.

In the case of the freeze-dried milk coffee, it is not a question of a new "taste" being formed should, but rather to offer a well-known drink (which has already been drunk by everyone in the drinks bar) with a new one that is more comfortable, better and more constant in terms of its organoleptic properties Preparation,

Experienced specialists in the field of beverage preparation have the influence on the L. ") exercise the aforementioned

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Problem of the way of preserving the freeze-dried and highly hygroscopic powder free from any contamination until the moment of its use investigated, also the exact dosages of the powder and the water to be used in each case, the respective Using water brought to the desired temperature at the time of use instead of warm water, previously prepared and preserved as such, dissolving the powder Pouring prepared water into the dose instead of dissolving the powder by gradually adding water, the elimination of the steam that may develop when the powder is dissolved in water and from the cup, into which the liquid drink is poured, etc.

However, the technical problem cannot be solved immediately, since the known factors affect the result of the mentioned investigations is to influence the properties of the drink according to physical laws that are used for are largely unknown and, besides the known ones, act on other unknown factors. Indeed they have Observations and investigations by the aforementioned specialists have only clarified some details of the phenomena that arise unfold before their eyes, while the result depends on many other influences, which are analytical Out of view in this research area, however, factors and laws known through the invention have been established as well as integrating unknown factors and laws in an intuitive way.

For a better understanding of the invention, it is described below by way of example in conjunction with the accompanying drawings Embodiments described in more detail, namely show:

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Fig. 1 in a schematic representation of a first embodiment of a device through which a freeze-dried Milky coffee powder can be obtained for a cup of framed beverage and which for Installation in a rectangular housing is intended as a dispensing device;

Fig. 2 in a schematic representation, but in a larger one Scale, the details of heating;

3 shows the powder container with metering device in elevation and partially in section and on an enlarged scale;

Fig. 4 is a view from above along the line IV-IV in Fig. and, on a larger scale, the details of the control of the supply valve for the water dose;

5 shows a schematic representation of an inventive Device according to another embodiment, in which alternatively and optionally three different cold drinks from just as many powdered Products, among which a freeze-dried milk coffee powder, can be produced;

6 shows the stirring device on an enlarged scale;

7 shows a schematic representation of an inventive Device according to a third embodiment for more cold drinks, always made of powders;

8 shows a tiltable stirring device in its entirety; 9 shows the chamber of the stirring device in section;

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Fig. ' 10 partially in section a sugar diverting device.

In Fig. 1-4, 1 schematically denotes the outline of a rectangular housing of the type used for coin-operated drinks machines is used. A niche N is formed on the front of the housing, on the bottom thereof a cup T can be placed, which is intended to hold the drink. In the vertical rear wall of the niche a suction opening 15 of a suction device is provided approximately at the level of the mouth of the cup T, which is described in more detail below is described. Although the niche N is separated from the inner chamber of the housing, it has an opening through it which an outlet pipe 13 can enter during its movement and be withdrawn again, as described in more detail below describes which spout is used to deliver the drink i η to fill the cup T. Inside the housing is an electric pump on the rear wall, on the left in Fig. 1 2 attached, which is supplied by a higher-lying closed container 3, the latter one Contains fresh water supply, the delivery line of the pump is connected to a container 4, which has an overflow and a Has return line to the container 3 and at the upper end of the housing is arranged. A downpipe extends from the container H, which has a constant water level 5 vertically downwards, which is connected to a riser 7 via a valve 6 (which will be described in more detail below) is connected, which opens at its end with a pipe bend of 180 ° in a small container 8, which is on the free upper end of a coil 9 arranged Lst, which immediately is subsequently embedded in a metallic mass 10 in the // iron described in more detail below. the Pipe snake \! int after you-eUi exit from the heated Masoe by a ger- adllnL'iUi vertical section 11 ver

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long, which leads past a container 12 for the soluble powder, which follows in more detail is described, and opens slightly above a shell 14 which is provided with the outlet pipe 13 and is mounted pivotably about an axis of rotation 0 (see Fig. 3), which is diametrically opposite to the outlet pipe is located and by the means described in more detail below an angular movement of the shell 14 from the horizontal Position, which is shown in Fig. 1 with full lines, in the inclined position, which is shown in the drawing with dashed lines, can be brought about. Adjacent to the mouth of the extension 11 of the pipe coil is the metering device, which is built into the lower part of the container 12 and is described in more detail below.

The suction device consists of an electrically driven suction fan 16 with two suction lines, one of which the one opens at 17 above the shell 14 and the other, as can be seen, at 15 at the level of the Müniing the T.

The delivery line of the suction device opens at 18 outside the housing. The valve 6 has a throttle member with a vertical stroke, which is held in the closed position by a spring 20 and that with a shaft is provided which protrudes from the body of the valve.

The metallic mass 10 is, as shown in Fig. 2, heated by an electrical resistor 22, which is in the Ground is installed and with power via a switch 2 3 is supplied, which is controlled by a thermostat 2H

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As can be seen from FIG. 3, a cylindrical metering cell 26 is located in the container 12 in the vicinity of the base 25 built-in, which is carried by a plate 27 fixedly connected to the container, on the upper side towards the periphery the upper opening of the cell opens. Bears in their midst the plate 27 has a bearing 28 in which a pin 29 is rotatably mounted but not longitudinally displaceable, which pin a little above the top of the plate 27 carries a disc 30 'firmly connected, which has an opening has, which corresponds to the mentioned upper opening of the metering cell, and a radial cutout as well a downwardly bent projection 30 which, when the disc rotates, moves just above the top of the disc 27 rotates so that it exerts a scraping effect on the contents of the metering device. The cone bears further down 29 firmly connected to another disk 31, the top of which brushes past the lower opening of the cell 26, which Disc 31 is provided with an opening corresponding to the last-mentioned opening to exit the Enable cell at the desired time.

Furthermore, the bottom 25 of the container is also provided with an opening 32 below the lower opening of the cell 26, which opening, as can be seen from the drawing, can be closed by a cover 3 3, which also is firmly connected to the pin 29 and is shaped so that the opening 32 is only exposed during the time which is necessary for the contents of the dosing cell to escape into the tray 14 below.

From the plate 27 is diametrically opposite to the cell from a cylindrical Anaatz 34 on which a inverted cup 35 is slidable, which is loaded by a spring 36 with a stroke limiter 37, the rim

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the inverted cup 35 is used to scrape and clean the top of the rotatable disk 31. The synchronized Movement of the various moving parts is provided by a single small electric motor 38 from commercially available obtainable type.

The output shaft 39, which ends at the top with the pin 29, performs one revolution per beverage preparation, whereupon it stops with the motor, with the one arranged on it Cam 44 interrupts the electrical circuit of the motor. There is a cam disc on the shaft 39 40 with two opposing cams (see Fig. 4) fixedly arranged, the profiles of which are of different angular extent via a two-armed lever 41 on the shaft 21 of the throttle member 19 act against the action of the spring, the valve during the wider cam corresponding angular movement is kept open, whereupon it closes again to allow angular movement again to be opened, which corresponds to the narrower cam, and then closed again.

On the same shaft 39, a further cam disk 42 with a single cam is firmly connected to this arranged, the profile of which acts on a short projection 4 3 of the shell 14 adjacent to the axis of rotation 0, whereby the shell is held in a horizontal position while overcoming its weight, which weight the Tends to pivot the shell about the axis 0, the horizontal position during an angular movement of the cam 42 is maintained, which begins shortly before the opening of the valve 6 and ends after the valve when leaving the first wider cam of the cam disk 40 has completed and after the dosing cell

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(see Fig. 3), which in the meantime has been refilled with powder has been moved upwards out of the container through the opening of the disc 30 ', which is above the upper opening of the cell has come to rest, and its van the protrusion or edge 30 scraped content into the underlying tray 14 through the corresponding opening of the disk 31 and the opening 32 in the base 25 of the container has been emptied, which latter opening is immediately closed again by the cover 33.

Thereupon leaves the cam disk 42, its uniform Continuing rotation, the shell 14 from the in Fig. 1 with position shown in full lines in the position shown in the same figure with dashed lines Pass position.

At this moment, the cam disk 40, which also continues its uniform rotation, acts with it narrower cam on the two-armed lever 41 on the shaft 21 of the throttle member 19, whereby this opens will. After the end of the action of this cam, the valve 6 closes, but at the same time also brings the cam disk 4 2 put the shell in its horizontal position and all parts are in their initial positions in readiness returned to the preparation of another beverage cup.

The foregoing description has been given by way of example only, so that modifications can be made within the scope of the invention can be provided.

For example, the metering valve 6 for the warm water may be provided with a horizontal shaft instead of a vertical shaft for dissolving, as shown in Fig. 4. In this case, the corresponding cam disc shows how

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shown, two cams 44 and 45 with horizontal profiles, which act on the lever 46, which is a one-armed Lever is. Furthermore, the two cams 40 and 42 can instead of each other from bottom to top in the specified Order and to follow as shown in Fig. 1, follow each other in the reverse order. Furthermore can the water storage tank 3 and thus the corresponding electric pump 2 are missing, since the tank 4 with its overflow in this case it is supplied directly from the water pipe via a tap or valve.

The arrangement described relates to the preparation of a cup of a single beverage, but it can of course easily be for the optional preparation of coffee, cappuccino, milk coffee, which drinks can be doubled or tripled always be prepared from a powder obtained by freeze-drying. Devices known Kinds not forming part of the invention, such as the devices by which the arrangement is put into operation when a coin is inserted, etc. are not described here.

The procedure performed in the described device is as follows:

When a coin or token is inserted into the slot provided for it, a known per se causes Device closing the circuit for the pump and for the electric motor 38 and also for the motor of the Suction device 16 and the resistor 22. The motor 38 is set in slow rotation (in the illustrated Example in a left turn) and thus also the cam disk 40, which by means of the lever 41/46 the valve 6

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opens for a certain time, so that the coil is supplied with water, the cam disk being in a position for the horizontal position of the shell 14 is located in which the latter a precisely defined amount of warm water is absorbed, since after a certain amount Time, which is determined by the width of the first cam of the cam disk 10, the valve 6 closes, and the water supply stops.

In the meantime, the metering device described has a filling of the cell 26 with the freeze-dried product allows and is now the disc 31 in such a position that the powder dose in the in water contained in the bowl can fall, whereupon the opening 32 in the bottom of the container 12 is closed by the lid 33 will. Immediately after the cam 42 has caused the inclination movement of the bowl 14 with the outlet pipe, so that they from the position shown in Fig. 1 with full lines down into the position shown in the drawing The position indicated by dashed lines is brought, in which position the beverage is poured into the cup T. will. The valve 6 is controlled by the outer cam of the cam disk 40 is opened again and another certain amount of water is warmed up, which is passed through the coil drains and washes the bowl, which is still in the inclined position, creating the desired dilution of the beverage collected in the cup T is obtained. Immediately thereafter, the valve 6 and closes the shell 14 resumes its original horizontal position. All movements come to a standstill and • β all parts are in a state for repeating the preparation cycle for a second drink.

The applicant determined in the course of her investigations

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shows that the same process produces the best results for the preparation not only of warm, but can also be achieved from cold drinks, if such demanded by the audience, also made of powdered form Products such as freeze-dried milk coffee, orangeade or the like. If it succeeds, the difficulty of the lesser To overcome the solubility of the powder in cold water, the heating medium for the coil is a refrigerant for this is replaced. The problem mentioned was overcome according to the invention in that instead of the bowl a stirring device 61 (Fig. 6) is used for the powder in the water, the motor 47 of which is controlled by the programming device the device is controlled. The chamber 48 of the stirring device is provided with a short outlet pipe 4 9 provided, on which a rubber hose 50 is pushed, which leads to the cup T. Press in during the stirring time two-armed lever 51 with its one arm 5 2 under the action of a spring 5 3 against the rubber hose 50 short below the pipe socket 49, whereby the outlet is throttled.

Under the control of a cam 58, which acts on the other arm 54 of the lever 51, the rubber hose released so that the fresh and finished drink falls into the cup T below.

The bottom of the space 55, in which the cup or mug is located, has an outlet that is connected to a The container 56 located underneath is in communication, which is used to dispose of liquid overflowing from the cup or pick up spilled liquids to avoid contaminating these organs leading to the device belong and are enclosed in the rectangular case,

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usually with output devices, since there is a risk of short circuits in the electrical equipment of the Device consists

The container is known per se and therefore not described in detail safety device 6 5 equipped, which puts the entire device out of operation when the container has reached its fill level Fig. 5 is a schematic of the entirety of the invention Device in its embodiment for three cold drinks of your choice are shown.

A s possibility of connection to the water supply network 3 = fresh water tank

M- s container with overflow for the fresh water 57 = coil which is immersed in the coolant of the tank 6 3, which is connected to a cooling system, not shown connected

78 = taps for the supply of the cooling water dose

79 s valve for regulating this dose

60 = powder container with dosing device

61 = stirring devices

51 s Lever for pressing the outlet rubber claw together 50 = rubber hoses

62 = spout with a single nozzle T = cup or mug

55 = space to hold the mug or cup

56 = Collecting container for spilled contents of cup T.

However, in practice there are powdery products which are not easily soluble in cold water and which exist the demand from customers to try so-called "FrappeV".

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In both cases, a more vigorous stirring action is required, however, this has the disadvantage that the drink is heated and therefore not a cold drink is obtained.

According to the invention, this difficulty is overcome by that instead of the previously provided stirring device a see (77) with high speed (10 000 to 12,000 rpm) (Figs. 8 and 9) is used.

At the bottom of the chamber of the stirring device, the stirring element is arranged in such a way that a "frappe" is obtained, while the wall of the chamber in which the stirring takes place is provided with cavities 80 which are cooled by a cold flow which is supplied by a circulation pump 6 H of the tank 6 3 is supplied, which contains the coolant for the coil.

In the particular embodiment shown in the drawing, the stirring chamber 6 5 has the shape of a top open vessel, arranged on the bottom of the agitator 67 is, while the open mouth of the vessel has a pouring spout 68. The body of the agitator 77 is mounted pivotably about a horizontal axis and can be tilted to expose its contents by means of the pouring spout to pour into the cup. The rotation of the agitator is controlled by a cam 6 9 of the Programming device controlled by a lever linkage 70.

In Fig. 7 is schematically an embodiment of the invention shown with which cold drinks with Frappfc or not and already sugared or not

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can be prepared.

Around the cold drink or frappe * already sugared received, a sugar metering device is provided, which pours the dose into a funnel between can swing two end positions · In one of these positions (drawn with full lines) promotes this funnel the dose into the normal agitator 61 when the electromagnet 71 is not energized. If this on the other hand, is excited, the funnel 73 moves under pressure against the spring 75 in the dashed line Position and empties the dose into the chute in the direction F, which leads to the stirring device 77 for the Frappe "leads.

Claims;

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Claims (1)

Claims Method for dispensing a cup of a beverage from a powdery product soluble in water, in particular from freeze-dried milk coffee, characterized in that each time the drink is prepared in a container provided with an overflow, fresh water is conveyed in an amount which essentially is the same as that used to prepare a cup of the beverage, whichever container a pipe coil is supplied, which is heated to the desired temperature at which the drink is enjoyed shall be, the water emerging from the coil is collected in a metered amount in a further container the soluble powder, especially freeze-dried milk coffee, in an airtight container Dosing container is held, which releases an opening for the minimum time necessary for the dose to exit also in the container that takes the water from the pipe coil is necessary, after dissolving the powder dose in the water dose the solution is drained into the cup, doing all the different operations of a cycle from a single output shaft of a conventional type of electric motor that rotates one revolution per cycle, can be controlled by means of corresponding cams. 2 · Method according to claim 1, for the preparation of a cup 109829/1208 a warm drink, characterized in that the coil is embedded in a metallic mass that is heated by electrical resistors and at the lower mouth of the container receiving the water from the coil and at the cup Vapors and other contaminants are extracted Method according to claim 1 in the preparation of a cup of cold drink, characterized in that the pipe coil is immersed in a refrigerant of a known cooling system and the dose of the soluble Powder as well as the dose of water are placed in a chamber, where they are vigorously mixed by mechanical means will. H.Verfahren according to claim 3 for the preparation of a cup cold drink made from a powder that is not easily soluble in cold water, for example freeze-dried Milky coffee or a cup of bustard drink, characterized in that the mixing of the The powder dose and the water dose are irveiner with each other Stirring device is done at high speed, the walls of the same continuously using the refrigerant which is used to cool the dose of water intended to be used to prepare the solution. 5. The method according to claim 3 or 4, characterized in that that the mixture of powder and water, which is conveyed to the stirrer, a sugar dose with the help 109829/1208 is added to a device provided for this purpose. Apparatus for carrying out the method according to claim 1, characterized by means known per se for supplying from the water supply network or from a container O) an amount of water which is substantially equal to that which is necessary for the preparation of a cup of a drink, to an upper, high level · container lying ⁽¹ O, which is provided with an upper run, a coil (9) which is arranged deeper than the containers mentioned (4) and stands on the upper opening with the container ( "♦) in communication, in a means is immersed or embedded, through which the contents of the pipe beat can be brought to a selected temperature, a container (12) for receiving the soluble powder, which is sealed against the outside air and contamination, contains a metering cell (26) which is in its lower part is arranged, wherein a bore (32), which is provided in the bottom wall of the container (12) at the location of the lower opening of the cell (26), du rch a spring-loaded cover (33) is closed except for the duration of the exit of the powder dose, a metering device for the amount of flowing water, a container in which the powder dose and the water dose are collected, the solution in a removable and from time to time time interchangeable cup is collected, the m of a plane is arranged, which is provided below the outlet of said container, "ine Irogrammiereinrichtung for the operation," the cycle, which essentially by 109829/1208 210Q024 the output shaft of an electric motor of the conventional type is formed »which one revolution per working cycle executes, by means of the necessary cams. Device according to claim 6 for the method according to claim 2, characterized in that the pipe coil (9) is embedded in a metallic mass (10) which is heated by electrical resistors (22), which are also built into the metallic mass and controlled by a thermostat (2H) for metering the water between the container (H) and the pipe coil (9) is provided with a valve (6), the shaft of which is controlled by a cam of the cam control a bowl (IH) is used to collect the coffee powder dose and the water dose, which is equipped with a Outlet pipe (13) is provided and pivotally mounted is, their position is controlled by one of the cams, the outlet pipe opens into the cup (T) on which Two suction tubes (17 or IS) of a suction device (16) are provided in the upper opening of the shell and the cup (T) which at (18) promotes vapors and impurities to the outside. 8. Vending machine for hot drinks, characterized in that the device according to claim 6 or 7 is enclosed in a rectangular housing with a front door, on the outer surface of which the switching device with control and programming push buttons and the niche is provided in which a removable cup (T) can be arranged. 109829/1208 9, device according to claim 6 for performing the method according to claim 3, characterized by a Vessel in which a refrigerant circulates in a Cooling system has been produced, and in which vessel the coil (9) is immersed, a stirring device (BL) serves to absorb the mixture of water dose and powder dose, the outlet line of the Stirring device is formed by a rubber hose (50) which opens over the cup (T), with a two-armed Lever (51) is provided, one arm (52) of which is used to slightly lower the end of the rubber hose the exit from the chamber of the stirring device Spring action to push to choke the hose, and a cam operated by the programmer is synchronized and counteracts the spring 10. Apparatus according to claim 9 for performing the method according to claim 4, characterized in that the stirring device is coupled to a motor at high speed (10,000 to 12,000 rpm), the wall of the agitator Having cavities (80) which are in communication with one another, and an electric pump (64) is provided which is activated and deactivated by the programming device and which from the mentioned vessel, which contains the refrigerant, sucks in and on its delivery side with the mentioned cavities in connection stands. 11. The device according to claim 10, characterized in that the chamber of the agitator has the shape of a cylindrical 109829/1208 210QQ2A Has a vessel with an open mouth, on its Bottom the agitator (67) is arranged, while its upper edge forms a pouring spout (68), the vessel is also rotatably mounted about an axis and can be tilted by means of a lever linkage (70), which is operated by a suitable motor, the electrical circuit of which is subordinate to the programming device the arrangement is such that the vessel pours into the cup (T) when it is tilted 12. Device according to claims 9 and 10, characterized in that that a sugar metering device (72) is provided, that of a normal stirring device (61) and possibly a rotating at high speed Stirrer ί77) and a funnel (73), which is connected to the spout when tilted. 13. Vending machine with a certain choice, for example a coin-operated machine, characterized in that its movable housing contains one or more devices according to one or more of claims 6-11. Machine according to Claim 13, characterized in that the cup (T) is located in a recessed space by the window of the housing is located, which space is accessible from the outside and its bottom with one below it Container (56) is in connection, which is located inside the machine housing, easily removed from this. 109829/1208 can be ferrite and is equipped with a safety device (65) that, when the container (56) is full switches off the operation of the machine. 109829/1208 Lee r side