ES2237681T3 - DRINK REFRIGERATION DEVICE. - Google Patents

Abstract

Device for cooling drinks, - with a tank (20), which is filled with water (water bath 12), - in which in the water bath (12) evaporation ducts (14) of a circuit are arranged of cooling next to each other, in such a way that they form at least one surface of the evaporator (16) of the plate type, - in which in the water bath (12) are arranged beverage lines that conduct the beverage, and - in which in the water bath (12) a stirring mechanism (18) is provided for the provocation of a water circulation (S), characterized by - a device (40; 50) for the conduction of the circulation of water (S), such that water also circulates essentially along the entire surface of the evaporator (16) and essentially parallel to it, the circulation guide device (40; 50) having two arms (42) , 44; 22, 50), which are connected to each other through an intermediate piece essentially in the form of a circular arc, whose radius of curvature (R) is selected to induce longitudinal turbulence of Taylor-Goertler in the water circulation (S).

Description

Beverage cooling device.

The invention relates to a device for the beverage refrigeration, according to the preamble of the patent claim 1, which is known from US-A-5,368,198.

The beverage cooling devices are they know in the state of the art, for example, so to speak, as beverage circulation refrigerators or as carbonators of circulation, for example for cooling beer and drinks without alcohol. For the explanation of the devices known from the state of the art referenced in first place to figures 1 and 2. Accordingly, the known beverage cooling devices feature a tank 20, which is filled with water, the so-called water bath 12. Evaporation ducts 14 are arranged in the water bath 12 of a cold circuit, such that they form at least one evaporator surface 16, for example because the ducts of evaporation 14 are arranged in the form of streamers of evaporation or adjacent or overlapping evaporation spirals each. According to the geometry of the tank and the guide of the ducts, evaporation ducts 14 can form in this case one or more amplification surfaces 16. Within the framework of the function of a thermodynamic cold circuit, the ducts of evaporation absorb heat from the water bath 12. The surface of the evaporator 16 may be optionally formed by the surface of a so-called ice bank 30, as described more ahead.

Therefore, in the water bath 12 they are arranged tubular ducts, in which the drink. Such drinking ducts are not shown in the figures. attached for reasons of clarity. They can be guided by any suitable manner in reservoir 20, typically taking advantage of in a essential measure the entire space of the water bath 12 and being able to be arranged centered around a stirring mechanism 18 and / or in the vicinity of an ice bank 30. The drink conducted in the drinking ducts gives heat to the water bath, with which the drink is refrigerated.

If the beverage cooling device should also be suitable for carbonated drinks, the deposit of respective carbonate may also be arranged in the bath of water 12 (not shown in the figures either).

In water bath 12 there is, therefore, a stirring mechanism 18, which causes a water circulation S in the water bath 12. In figure 1, a curve is represented average copy in terms of time and space of circulation of water S induced through the stirring mechanism 18. In the case of a rotation (arrow D) of the stirring mechanism 18, by example around a central axis of the tank 20, the water circulates accordingly in the center of the tank 20 first axially downward, that is, perpendicular to the bottom of the tank 22. Through the rebound on the bottom of the tank 22 the circulation is then diverted radially outward. Through of the next rebound on the walls of the tank 24 or on the evaporation surfaces 16 if necessary there is carried then outward movement deviation. From an alternative way, any other is also conceivable proper arrangement of the stirring mechanism 18 in the tank 20 with a correspondingly different circulation curve, for example an offset arrangement of the agitation mechanism 18, in which the circulation curve is, in principle, equal to the curve described above.

From thermodynamic points of view and for the realization of the respective beverage refrigeration, serves the Water from water bath 12 serves as both an energy accumulator as also as a means of transport to transmit heat from the beverage ducts to the evaporation ducts 14. As energy accumulators water is used through the formation of an ice sheet 30, which forms around the evaporation tubes 14. In this case there is talk of a so-called bank of ice, whose surface corresponds to the surface of the evaporator 16. The enthalpy of solidification of the water accumulated at through the transition of the phases it serves for the coverage of short duration of power peaks and thus reduce the magnitude of the power of the cold circuit procedure. Agree with the application case, an evaporator 14, 16 can be operated, however, also without ice cap 30, that is, the beverage cooling device works in such case without pack ice.

Water is used as a means of transport of the circulation S induced from the stirring mechanism 18 in water bath 12, as described above. The water circulation S has in this case the objective of improving, on the one hand, the transmission of heat from the evaporator 14, 16 or  well from the ice sheet 30 towards the water as well as from the water towards the drinking ducts. Moreover, through the water circulation S water transport should be intensified heated locally to cooler areas of the water bath 12.

When speaking in the present case of "water" as an energy accumulator and means of transport, this concept represents all other suitable media or fluids, that have comparable properties and functions and that display, with regarding the invention, the same effects and provide comparable results.

In such beverage cooling devices with ice bank and especially in the described development before the water circulation S in the water bath 12, raises the problem that through the normal component of the water circulation with respect to ice bank 30 can be produce successive erosion of the ice bank 30. If it occurs the development described above of the water circulation S for a prolonged period of time, then it is set to the ice bank 30 an outline of erosion A, as represented by way of example in figure 2. As follows clearly, erosion A of this type occurs in a way preferred in the lower area of the ice bank 30, therefore, for example, in the vicinity of the deposit fund 22. Under from this erosion A, the water circulation S does not deviate by 90º approximately upwards, but at an angle greater than 90º, given the case even at an angle essentially greater than 90 °. This has  as a consequence that water no longer essentially circulates over the entire height of the ice bank parallel to the surfaces of evaporation 16 or else to ice sheet 30, but the circulation follows rather from these surfaces, that is, that the water circulation already loses clearly in front of the song top of the ice bank 30 immediate contact with the bank of  ice. Under erosion A can also cause turbulence of the circulation in the water bath 12 which, given the case, they can have negative repercussions.

The effects described have as a consequence that the surface is reduced, in which hot water can give energy to the ice sheet. In this way the transmission of heat between the water bath and the evaporator is worsened, but also between the water bath and the drinking ducts, which causes a loss of power and, in general, a reduced performance of the device Beverage cooling Therefore, due to erosion A and the reduction of the thickness of the ice bank in the lower area of the water bath, an early destabilization of the ice bank can occur, which can result in, under certain circumstances, a reduction in the capacity of the tip load. Due to poor rinsing of the ice bank in the upper area of the water bath, which is conditioned again by the detachment described above of the circulation of the ice bank, a reinforced tendency to cool the water can also occur. the upper ducts of
drinks.

Therefore, the invention has the task of avoid the aforementioned inconveniences of the state of the art and of especially prevent erosion of the ice bank with the inconveniences involved with it.

This task is solved according to the invention by means of a device for cooling drinks according to the patent claim 1. Accordingly, the device beverage cooling specially features a device for the conduction of water circulation, such that the water also circulates essentially along the entire surface of the evaporator and essentially parallel to it. The device of Circulation guide features two arms, which are joined between yes by means of an intermediate piece configured essentially in circle arc shape, whose radius of curvature is selected to induce longitudinal turbulence of Taylor-Goertler in the water circulation.

According to the invention, through the circulation guide device, which is arranged in the beverage cooling device is driven so forced water circulation at least partially in such a way that water circulates, in the area of evaporation surfaces, if possible, essentially parallel to these, being performed this circulation essentially along the entire surface of the evaporator. When the evaporator is driven with an ice sheet (ice bank), circulation develops in this way essentially parallel to the surface of the ice bank and essentially over the entire height or length of the ice bank in The deposit.

Therefore, through the device circulation according to the invention prevents water circulation peel off in the area of evaporation surfaces or of the ice bank from these and loses contact with them. In by virtue of the forced circulation of water, on the other hand, erosion of the ice bank with the drawbacks involved with it, mentioned above. Through driving according to invention of water circulation in parallel and essentially over the entire length of the ice bank is carried out especially an improved heat transmission between the water and the ice bank / evaporator, which achieves a power High and improved cooling device performance of drinks.

In the case of induced water circulation to through the stirring mechanism, described above with in relation to figures 1 and 2 in the water bath, the device circulation guide is essentially arranged at the bottom of the deposit and has a way that deflects the circulation of water in the lower end zone of evaporation surfaces in a direction essentially parallel to evaporation surfaces. In this case, in principle, it does not matter if the walls of the tank and / or evaporation surfaces, which are arranged in the area of these walls or inside the tank at a distance from the tank walls, are arranged perpendicular to evaporation surfaces or at an angle with respect to the fund of the deposit. In principle, it also has importance of the form, development and disposition of the fund of the Deposit. The evaporation surfaces and / or the walls of the deposit and / or the bottom of the deposit may be arranged, so therefore, at any discretionary angle to each other.

However, in one embodiment preferred of the invention, the evaporation surfaces are arranged perpendicular to the bottom of the tank that extends horizontal, essentially flat, in which the guiding device of the circulation deflects the circulation of water in this case in a 90º angle approximately.

In a preferred embodiment of the invention, the circulation guide device is configured in the form of at least one frame or guide sheet profile, which they are mounted in the water bath at the bottom of the tank and / or in its proximity The guide plate or the frame have a essentially L-shaped cross section, being aligned an arm of the L-shaped plate essentially parallel to the surface of the evaporator, and the other arm of the L-shaped plate essentially parallel to the bottom of the tank, with horizontal preference.

In a preferred embodiment of the invention, the circulation guide device has a frame profile, which is arranged radially within the evaporation surfaces, where the arm essentially aligned parallel to the evaporation surfaces slightly overlaps the lower end of evaporation surfaces.

In a first case of application, in which the evaporation surfaces essentially extend to the bottom of the tank, the frame profile can be supported on the deposit fund. In this case, especially the arm of the frame profile, which is aligned essentially parallel to the bottom of the deposit, rest on the bottom of the deposit. In a configuration developed in this embodiment, the Circulation guide device can take the form of a flat tray with closed bottom, which is mounted on the bottom of the Deposit. In an alternative or additional way, one or more projections or prints may be provided at the bottom of the deposit or at the bottom of the bucket, which have an effect correspondent.

In a second case of application, the surfaces evaporation may be arranged at distances from the bottom of the deposit and / or deposit walls. In this case, the profile of the frame, which is arranged radially within the evaporation surfaces not found on the bottom of the deposit but is arranged elevated above it in such a way that again the arm that is aligned essentially parallel to evaporation surfaces slightly overlap the end lower evaporation surfaces.

In this case, the guiding device of the circulation is configured and arranged, in general, in such a way that the water circulation is divided into the end zone bottom of the evaporation surfaces such that it carries out a water circulation both radially inside and also radially outside the evaporation surfaces. The technical advantages of the frame profile circulation or of the guide plate not only take advantage on one side but on the two sides of the ice bank, that is, of the bank side of ice pointing radially inward as well as on the side of the ice bank pointing radially out, being divided the water flow, which perpendicularly affects the inner surface of the ice bank and being driven then both behind (outside) and also in front (inside) the bank of ice along the surfaces of the ice bank. This way, the transmission surface of approximately doubled heat from the ice bank or from the evaporator, so that through from these measures an improved heat transmission is achieved additionally between the water and the ice bank / evaporator, with what you get a higher power and performance Improved beverage cooling device.

In the second application case mentioned lately, in which the evaporation surfaces are arranged at distances from the bottom of the tank and / or the walls of the tank, the circulation guide device can present a second frame profile, which is arranged below and / or at least partially radially off the surfaces evaporation This frame profile can rest again on the bottom of the deposit, resting here then especially the frame profile arm, which is aligned essentially parallel to the bottom of the deposit, on the bottom of the Deposit. Instead of the second frame profile, it can be used again a flat tray with a closed bottom. For the rest, the second frame can be attached to the first frame to form a general unitary configuration, so that the Circulation guide device can be used as a component in the reservoir of the cooling device of drinks.

In principle, in the configuration of all previously described embodiments of the device circulation guide, we must ensure that the deviation of the water circulation in the area of the lower end of the evaporation surfaces are carried out in such a way that the main circulation direction develops, after leave the circulation guide device, parallel to evaporation surfaces or the database.

Other details and advantages of the invention are deduced from the following description of different examples of realization with the help of the attached drawings.

Figure 1 shows schematically in the cross section a beverage cooling device known from the prior art.

Figure 2 schematically shows in a cross section a beverage cooling device known from the state of the art, where the erosion effect of the bank of
ice.

Figure 3 shows schematically in the cross section a beverage cooling device according to the invention.

Figure 4 shows schematically in the cross section another embodiment of a device beverage refrigeration according to the invention.

Figure 5 shows a perspective view of a circulation guide device according to the invention.

Figure 6 shows different ways of realization of a circulation guide device according to the invention in the cross section.

Figure 7 shows schematically in the cross section another embodiment of a device of beverage refrigeration according to the invention.

Figure 8 shows two perspective views of a circulation guide device according to the form of embodiment shown in figure 7 of a device of beverage refrigeration according to the invention.

The beverage cooling device has, first, the characteristics, which have been described above with reference to figure 1, which is made reference onwards.

Figure 3 shows a device of beverage cooling, which corresponds to the device beverage refrigeration shown in figure 1, in which the same characteristics are identified with the same signs of reference. However, in addition, the device beverage refrigeration now presents in a first form of embodiment a circulation guide device 40, which is arranged at the bottom of the tank 22. The guiding device of the circulation is especially a circulation guide frame or guide plate of the circulation 40a, which is represented in perspective in figure 5 and in the cross section in different embodiments in figure 6.

For the function of this guide plate frame 40a is decisive, on the one hand, its position with respect to the tube of evaporation lower 14a in ice bank 30 or with with respect to the lowest position of evaporation tubes 14, when these extend, for example, around the walls 24 of the tank 20. Moreover, for the function of the sheet metal frame guide 40a, the shape and size of the profile of the frame. In principle, the shape of the profile should lead to a essentially rectangular deviation of water circulation (see Figures 3, 5 and 6), assuming that the circulation main development, before deviation, parallel to the tank bottom 22, as described above with relation to figure 1. In this embodiment, the deviation rectangular of the water circulation S leads to the water after the deviation, circulate essentially throughout the evaporator surface or the entire bank surface of ice 16 or essentially parallel to it.

With reference to the form and measures of the guide plate frame 40, 40a reference is now made to the Figure 6, in which the individual representations are shown (A), (B) and (C) of different embodiments, in each case in the cross section. In principle, the shape of the frame should be selected so that the circulation deviation is made in the most smooth, homogeneous and continuous way possible, without produce turbulence of the circulation or a backwater of water. He frame profile 40a has a cross section essentially L-shaped, in which the upper arm 42, which is associated to the surface of the evaporator 16 or to the bank of ice 30, is under an essentially right angle over the arm lower 44, which is associated with the bottom of the tank 22 (angle β = approximately 90 °).

The variant according to figure 6 (A) represents the simplest configuration of frame 40a, which only complies with an insufficient measure the mentioned requirements. In one way preferred, shapes corresponding to the Figures 6 (B) or (C). In the embodiment according to figure 6 (C), the upper arm 42 passes through an intermediate piece essentially in the form of a circular arc to the lower arm 44. In In this case, the radius R has a decisive influence on the Deviation quality, and should be selected in a way Preferred as large as possible. In the embodiment according to figure 6 (B), the upper arm 42 passes through a intermediate piece inclined to the lower arm 44, being inclined the chamfer at an angle? relative to the bottom of the tank 22 or with respect to the lower arm 44. For the achievement of a good deviation of the circulation, the angle α should preferably have about 45 °, and the chamfer should be as long as possible. With respect to embodiment according to figure 6 (C), the intermediate piece beveled according to figure 6 (B) simplifies the radius R, which is a simplest solution, especially from the point of view of the manufacturing technique

Through the deviation of the circulation of water, especially on a continuous curved surface of the sheet or of the circulation guide frame, for example according to the embodiment according to figure 6 (C), can be induced the so-called longitudinal turbulence of Taylor-Goertler in the circulation. Such longitudinal turbulence can occur. in the case of an overlay of a boundary layer of the wall with centrifugal forces, as in the present case during circulation above the guide plate. Such turbulence Longitudinal can especially have a positive effect on heat transmission

In another embodiment, it is conceivable that evaporator surfaces / ice bank surfaces 16 are not perpendicular (β = 90º) but at a lower angle or greater than 90º with respect to the fund of the deposit 22. In this case, the upper arm 42 of the frame 40a must be aligned with new parallel to the surface of the evaporator / surface of the ice bank 16, that is, it forms the same angle with the arm lower 44 of the frame 40a, which is formed between the surface of the evaporator / surface of the ice bank 16 and the bottom of the deposit 22.

Starting from the provision represented in the Figure 3 of the circulation guide frame 40, 40a essentially on the or in the area of the bottom of the tank 22, with in relation to the length of the arms 42, 44 of the frame 40a, the length h of upper arm 42 should be selected in one way  preferred so that arm 42 preferably coats between 25% and 50% of the diameter of the lowest evaporation tube 14a of the evaporator surface 16 or the lowest position of the evaporation tubes 14. Therefore, the length h depends on the arrangement of the evaporator in the tank 20 and especially of the height of the lowest evaporation tube 14a of the evaporator over the fund of deposit 22, being selected as reference of the evaporator position in the tank in a typical way the point with the maximum distance from the bottom of the tank. The length t of the lower arm 44 is in a preferred manner approximately between 0.25 and 0.5 times the length h of the arm upper 42.

In the embodiments of Figure 6, the angle? between arms 42 and 44 of the guide frame of the circulation 40 should preferably be 90 °, so that it is achieved a rectangular deviation of the circulation, parallel to the evaporator surface / ice bank surface 16. If select the angle β greater than 90 °, then the  erosion effects in the ice bank, which have been explained above with reference to figure 2. In this way, it is not would solve the task of the invention in a sufficient manner, and the effectiveness of the guiding device would be canceled at least in part of circulation. When the angle? Less than 90º, the task according to the invention is not solved in a sufficient measure, since the water circulation would come off  immediately after deviation from the surfaces of the evaporator / surfaces of ice bank 16 and would be removed from these. In this way, the transmission of heat between the water and the evaporator, which would reduce another time the power and performance of the cooling device of drinks.

The minimum distance from the guide frame of the circulation 40 with respect to the evaporator serpentine results to from the minimum distance X between the evaporator tubes 14 and the tubes that conduct the drink (not shown). As value typical guidance should be selected for this distance between 0.5 and 0.7 times the distance X.

According to the type of construction of the beverage refrigeration tanks, which predominate in the technique of drinks, with rectangular plan, the guide device of the circulation should also have a rectangular plan, such as it is represented for the circulation guide frame 40 by way example in Figure 5. In such an embodiment, the corners of the tank are also secured Water circulation conduction. Through the form of essentially angular construction of the frame and to through the radii of curvature of the evaporation tubes in the corners of the deposit intensified erosion occurs in the corner areas of the ice bank. However, this it has the advantage here that areas are better protected normally more threatened by freezing.

As an alternative to the rectangular shape of the beverage cooling tank and guide frame of the circulation, reservoir and circulation guide frame they can have any other suitable plant, for example a plant essentially circular. For the form and for the measurements of the circulation guide frame can be applied in this case in a similar way essentially the same thing that has described above in relation to figures 6 (A) to (C).

According to another embodiment of the invention, the circulation guide device may be formed by one or several projections 50 at the bottom 22 of the tank 20, as shown by way of example in Figure 4. In particular, the projection 50 may be a stamping, groove or notch that is projected into the interior space of the tank. In this case, the projection must present an arm again, which is aligned essentially parallel to the surface of the evaporator / surface of the ice bank, so that the water circulation it is diverted again so that the water circulates again essentially parallel to the surface of the evaporator / surface of the ice bank and be a preferred way essentially at along its entire surface. In the embodiment according to the Figure 4, the radially internal arm of the print 50 causes the deviation of the water circulation upwards. In this case, projection or stamping 50 flaps again easily the lower end of the evaporator surface / surface of the ice bank, as described above, in principle,  in relation to the upper arm 42, which is essentially placed  perpendicular, of the L-shaped frame profile 40a.

In an alternative embodiment according to figure 4, stamping or projection 50 are arranged radially in the outermost position of the bottom of the tank 22, that is, in the lower outer corner of the tank,  so that it is immediately below the surface of the evaporator or of the ice bank 30. The arm radially interior of the stamping 50 may in a certain way form the extension of the evaporator surface / bank surface of ice 16 down, a deviation from the water circulation S up again through this arm which is aligned parallel to the surface of the evaporator / surface of the ice bank 16. For the deviation to take out as smoothly and uniformly as possible, this arm can pass, in the two cases described in the embodiment according to Figure 4, again through an intermediate piece in the form of circular arc or through an inclined intermediate piece, until the fund of deposit 22, as explained, in principle, above with reference to figures 6 (B) and (C).

The use of a guide frame of the circulation 40 has, compared to projections or prints 50 at the bottom of the deposit, the advantage that the operation of the beverage cooling device of a more individual and flexible way, being able to use it cooling device, as needed, racks Circulation guide 40 of different size. Instead, the 50 prints are rigidly joined in one piece with the tank 20. Therefore, the manufacture of the frame of circulation guide, regardless of the deposit of beverage cooling is easier from the point of view of the production technique that the manufacture of prints or projections at the bottom of the deposit. If of evaporator tubes or circulating evaporator coils in the tank, the stamping must also circulate in a way corresponding, in general, at the bottom of the deposit, which may  be equally problematic from the point of view of the technique of production.

In the embodiments, described up to now with reference to figures 3 and 4, of the device beverage refrigeration according to the invention, the surfaces of the evaporator / ice bank surfaces are arranged essentially on the tank walls, and they extend essentially to the bottom of the deposit. The frame profile, which is arranged radially within the surfaces of the evaporator, you can rest in this case on the bottom of the Deposit. Instead, in another embodiment of the device  beverage refrigeration according to the invention, which is represented in Figures 7 and 8, the evaporator surfaces / surfaces of the ice bank 16 are arranged at distances from the bottom of the tank 22 and the walls of the tank 24. In this case, the frame profile 40a, which is disposed within the surfaces of the evaporator, it is not arranged on the bottom of the tank 22 but is arranged elevated above it, in such a way that again the arm 42, which is essentially parallel aligned to the surfaces of evaporator 16, slightly overlap the end bottom of the evaporator surfaces 16. Otherwise, the embodiment represented in figure 7 corresponds essentially to the beverage cooling device represented in figures 3 to 6, the same being identified features with the same reference signs. In particular, the profile of the frame 40a of figure 7 corresponds to the profile of the frame 40a which is represented in figures 5 and 6, so that what has been said above with reference to these figures applies in a similar way also for the embodiment of the figure 7.

Through the circulation guide plate 40a according to figure 7 a controlled circulation of the water S on the two sides of the ice bank 30, being divided the water circulation S, which flows essentially parallel to the bottom from reservoir 22 and essentially perpendicular to ice bank 30 or well perpendicular to the inside surface of the evaporator / surface of the ice bank 16, in the area of the lower end of the evaporator surface / ice bank surface 16, such that a part of the water circulation S is guided to along the surface of the evaporator 16 pointing radially inward, that is, in a certain way inside in front of the 30 ice bank along this evaporator surface / ice bank 16 up while the other part of the water circulation S is guided between the wall of the tank 24 and the surface of the evaporator 16 pointing radially outward is say, in some way outside behind the ice bank 30 to along this evaporator surface / bench surface of ice 16 up. The wall of the reservoir 24 forms, together with the surface of the evaporator 16 pointing out, so both, in a way, a guide band or a channel for respective partial water circulation. As already explained to principle, through this embodiment is duplicated approximately the heat transfer surface of the bank of 30 ice or evaporator. In the most favorable cases, the smell surface surrounded by the current can be included more How duplicated.

As depicted in Figure 7, in addition to first frame profile 40a, can be additionally provided a second frame profile 40b, which is arranged below and at less partly radially outside the ice bank 30 or of evaporator surfaces / ice bank surfaces 16. This second profile of the frame 40b can rest on the bottom of reservoir 22, and can improve the driving and deviation of that partial circulation of water, which flows between the wall of the reservoir 24 and the surface of the evaporator 16 pointing radially out. The profile of the frame 40b can correspond essentially to the profile of the frame 40a, which represented in figures 5 and 6, so that what was said previously with reference to these figures also applies of a similar way for the frame profile 40b.

If the second frame profile is not provided 40b, then conduction and deviation of the respective partial water circulation through the corners bottom of deposit 20, that is, through the transition between the bottom of the tank 22 and the walls of the tank 24. This transition must then be configured in an appropriate manner correspondent. In both cases, the first frame profile 40a must be retained through spacers appropriate to distance over the bottom of the tank 22 or over the second frame profile 40b.

The second profile of the frame 40b may be connected to the first frame profile 40a to form a general configuration, as shown in the two representations of figure 8. In this case, the guiding device of the Circulation 40 is a double guide frame or double guide plate, which can be used as a unit component in tank 20 of the beverage cooling device.

In another embodiment of the device beverage refrigeration according to the invention, which is not shown in the figures, the circulation guide device 40 can be formed by a part, which is arranged in the tank 20 radially within the surfaces of evaporator 16 and at a distance, essentially parallel to these, extending the wall essentially along the entire length of the surface of the evaporator 16 or along a large part thereof. Wall together with the surface of the evaporator 16 in a way a guide band or a channel for water circulation, which extends in this way always parallel to the surface of the ice bank and you can't get rid of it.

Claims (17)

1. Device for cooling drinks,

-

with a tank (20), which is full of water (water bath 12),

-

at that in the water bath (12) ducts of evaporation (14) of a cooling circuit next to the others, in such a way that they form at least one surface of the evaporator (16) of the plate type,

-

at that in the water bath (12) beverage lines are arranged that drive the drink, and

-

at that a stirring mechanism is arranged in the water bath (12)  (18) for the provocation of a water circulation (S),

characterized by

-

a device (40; 50) for the conduction of water circulation (S), so that water also circulates essentially at along the entire evaporator surface (16) and essentially parallel to it, presenting the guide device of the circulation (40; 50) two arms (42, 44; 22, 50), which are attached each other through an intermediate piece essentially in the form of circular arc, whose radius of curvature (R) is selected for that longitudinal turbulence of Taylor-Goertler in the water circulation (S)

2. Beverage cooling device according to claim 1, wherein the surfaces of the evaporator (16) are essentially arranged in walls (24) of the tank (20), and in which the stirring mechanism (18) is arranged such that the water in the reservoir (20) circulates axially downwards, in the bottom (22) of the reservoir (20) circulates radially outward and then in the area of the walls (24) of the reservoir (20) is diverted towards above, characterized in that the current guide device (40; 50) is arranged essentially at the bottom of the tank (22) and has a shape that deflects the circulation of water (S) in the area of the lower end of the surfaces of the evaporator (16) in a direction essentially parallel to the surfaces of the evaporator
(16). 3. Beverage cooling device according to claim 1 or 2, characterized in that the evaporator surfaces (16) are arranged essentially perpendicular to the bottom of the tank (22) and because the circulation guide device (40; 50) deflects the water circulation (S) at an angle (β) of approximately 90 °. 4. Beverage cooling device according to claim 2 or 3, characterized in that the circulation guide device (40) has at least one frame profile (40a; 40b) with an essentially L-shaped cross-section, one of whose arms (42) are aligned essentially parallel to the surfaces of the evaporator (16) and whose other arm (44) is aligned essentially parallel to the bottom of the tank (22). 5. Beverage cooling device according to claim 4, characterized in that the circulation guide device (40) has a frame profile (40a), which is arranged radially within the surfaces of the evaporator (16), wherein The arm (42), which is aligned essentially parallel to the evaporator surfaces (16), overlaps the lower end of the evaporator surfaces (16). 6. Beverage cooling device according to claim 4 or 5, characterized in that the surfaces of the evaporator (16) extend essentially to the bottom of the tank (22) and because the arm (44), which is aligned essentially parallel to the bottom of the tank (22), rests on the bottom of the tank (22). 7. Beverage cooling device according to claim 4 or 5, characterized in that the evaporator surfaces (16) are arranged at distances from the bottom of the tank (22) and / or from the walls of the tank (24), and because the device The flow guide (40) has a frame profile (40b), which is arranged below and / or at least partly radially outside the evaporator surfaces (16). A beverage cooling device according to claim 7, characterized in that the arm (44) of the frame profile (40b), which is aligned essentially parallel to the bottom of the tank (22), rests on the bottom of the tank (22). 9. Beverage cooling device according to one of claims 4 to 8, characterized in that the circulation guide device (40) is arranged such that the water circulation (S) is divided into the area of the lower end of the evaporator surfaces (16) in such a way that a circulation of water (S) is carried out both radially inside and also radially outside the surfaces of the evaporator (16). 10. Beverage cooling device according to claim 2 or 3, characterized in that the circulation guide device (40) is formed by at least one projection (50) at the bottom of the tank (22), especially by at least one stamping (50) that is projected into the interior space of the tank at the bottom of the tank (22), the projection (50) presenting an arm, which is aligned essentially parallel to the surface of the evaporator (16). 11. Beverage cooling device according to one of claims 4 to 10, characterized in that the evaporator surfaces (16) are formed by evaporation tubes (14) placed superimposed, and because the arm (42), which is essentially parallel aligned to the evaporation surfaces (16), it has a length (h) such that in the case of an arrangement radially within the surfaces of the evaporator (16), it preferably covers between 25% and 50% of the diameter of the lower evaporation tube (14a) of the evaporator surfaces (16). 12. Beverage cooling device according to claim 11, characterized in that the arm (44), which is aligned essentially parallel to the bottom of the tank (22), has a length (t), which is between about 0.25 and 0, 5 times the length (h) of the other arm (42). 13. Beverage cooling device according to one of claims 1 to 12, characterized in that the tank (20) and the circulation guide device (40) have an essentially rectangular plan. 14. Beverage cooling device according to one of claims 1 to 12, characterized in that the tank (20) and the circulation guide device (40) have an essentially circular shaped plant. 15. Beverage cooling device according to one of claims 6, 7 or 8, characterized in that the circulation guide device (40) has a closed bottom tray. 16. Beverage cooling device according to one of the preceding claims, characterized in that the circulation guide device (40) has a wall, which is arranged radially within the surfaces of the evaporator (16) and at a distance essentially parallel to the evaporator surfaces (16). 17. Beverage cooling device according to one of the preceding claims, characterized in that an ice layer is formed on the evaporator ducts (14), in which the evaporator surfaces (16), which are formed by the evaporation ducts (14), are ice surfaces (ice bank 30).