JP6341801B2 - Beverage dispenser - Google Patents

Description

  The present invention provides a beverage dispenser that includes a plurality of beverage nozzles and shares an electrical control element such as a water supply valve to a water supply tank and a float switch for detecting the water level of the tank with the plurality of beverage nozzles. The present invention relates to a coping means when a malfunction occurs in a controller that controls a control element.

  Beverage dispensers are widely used in which edible ingredients in the form of granules or paste are diluted with cold water or hot water to pour out beverages such as juice and miso soup. This beverage dispenser generally has one beverage nozzle, but in large restaurants, leisure spots, etc., there are cases where many people want to dispense the same beverage at the same time, or dispense different types of beverage with one dispenser. Thus, a single dispenser provided with a plurality of beverage nozzles is used. A dispenser having a plurality of nozzles (hereinafter referred to as “multiple types”) has basically the same configuration as a dispenser having a single nozzle (hereinafter referred to as “single type”), and is used for cold water and hot water for various beverages. The water tank that supplies water is shared. In general, if there are multiple types, the capacity of the water supply tank is larger than that of a single type, but a water supply valve (solenoid valve) for supplying water from an external water system to the tank, and the water in the tank Any type of dispenser is commonly used as an electric means for heating and cooling the tank, and a float switch for monitoring the water level in the tank.

  By the way, in the single type beverage dispenser, the mixing ratio of the edible raw material in the beverage poured out from the single nozzle and the liquid for diluting the raw material, the amount required for one dispensing, etc. are most appropriate. As such, it is electrically controlled by a dedicated controller. However, in the plurality of types of dispensers, as a matter of course, since the mixing ratio of the beverage to be dispensed, the amount to be dispensed, and the like are different for each beverage nozzle, the controller for each nozzle must be controlled. Don't be.

  Moreover, since there is only one water supply tank in the beverage dispenser regardless of the single type or the plurality of types, the amount of hot water (or cold water) for diluting the edible material is stored in the tank. It is affected by the amount of water (water level) that is being used. That is, the amount of water dispensed from the beverage nozzle is fixed, but the water level in the water supply tank is accompanied by a variable water head pressure (position head), so the amount of water dispensed varies. Will come. Japanese Patent Application Laid-Open No. 2004-65851 has proposed that the amount of water dispensed from the beverage nozzle is constant even when such a water head pressure difference (water level difference) exists.

  The beverage dispenser of the invention according to this prior art is, for example, a coffee server shown in FIGS. 8 and 9, in which a coffee chamber 12 containing coffee powder is installed on the upper part of the dispenser body 10, and a front panel 14 of the body 10 is provided. Is provided with a coffee liquid take-off cock 16. As shown in the longitudinal section of FIG. 9, a hot water storage tank 18 is disposed inside the dispenser body 10, and water from an external water system is supplied to the tank 18 through a water supply valve 20. In addition, a float switch 22 for vertically monitoring the liquid level in the hot water storage tank 18 is vertically arranged, and a step-by-step confirmation of the water level is performed by an upper limit water level sensor, an intermediate water level sensor, and a lower limit water level switch that are linked to the float. You can get none. An electric heater 24 is provided at the bottom of the hot water storage tank 18 so that water in the tank 18 can be heated to a predetermined temperature. Further, hot water in the hot water storage tank 18 is sucked out by a pump 28 through a pipe 26 drawn horizontally from the bottom of the tank, and connected to the discharge side of the pump 28 to extend upward from the coffee chamber 29. Hot water is supplied to No. 12.

  As described above, the hot water storage tank 18 is provided with sensors (float switches) that detect the water level in multiple stages in the vertical direction. In the invention, the amount of water discharged from the coffee liquid take-out cock 16 is made constant regardless of the level of water in the hot water storage tank 18 (although there are upper and lower limits). Is calculated from the amount of water dispensed and the amount of water supplied, and the rotation time of the pump 28 is appropriately corrected at the time of dispensing. Further, the float switch 22 of the hot water storage tank 18 includes a sensor that detects the water level in multiple stages. Therefore, every time the water level reaches each level, a correction value is set to a known predetermined value by a controller (not shown). By correcting the error, accumulation of errors in the amount of remaining water in the hot water storage tank 18 due to fluctuations in the supply water pressure or voltage is prevented.

  FIG. 10 shows an operation flow of the coffee server according to the conventional invention described above. In FIG. 10, whether or not the water supply valve 20 shown in FIG. 9 is ON is confirmed in step S1, and if it is affirmed (YES), the amount of water supplied by water supply to the hot water storage tank 18 is added in step S2. . If the result is negative (NO), the process proceeds to the next step S3. Then, in step S3, it is confirmed whether the float switch 22 has detected a change in the water level in the hot water storage tank 18. If the result is affirmative (YES), the process proceeds to step S4, where the amount dispensed is known. Value and the water supply amount is set to zero (0) in the controller. Next, the process proceeds to step S5, where it is confirmed whether or not there is a signal for pouring hot water from the hot water storage tank 18, and if the result is negative (NO), the process returns to step S1 to repeat the routine described above.

  In step S5 of FIG. 10, the water level of the hot water storage tank 18 is set in, for example, five levels of E, L, C, H, and F in order from bottom to top, and the sensors provided at each level correspond to each level. It is designed to detect the level. Here, the lowest E indicates that hot water can not be poured below the level E in order to prevent the heater 24 from being exposed on the water. The amount of hot water stored in the hot water storage tank 18 from the second level L to the highest level F from the bottom is, for example, 12,000 ml. And as an example, when it rises and changes from the water level E to the water level L, the amount of water supply is set to 0 ml with the extraction amount of 12,000 ml. When the water level L changes from the water level L to the water level C, the water supply amount is reset to 0 ml with the dispensing amount of 8,000 ml.

  If the confirmation result in the step S5 is affirmative (YES), the process proceeds to the next step S6, and the correction of the hot water pouring time by the pump 28 is calculated. Based on the calculated dispensing correction time of the pump 28, the dispensing operation by the pump 28 is performed in the next step S7, and the dispensing amount is further added in step S8.

JP 2004-65851 A

  When developing a single-type dispenser as described above, it is only necessary to develop a controller that can share multiple types of dispensers, but depending on how many nozzles can be used, the reverse is necessary. In addition, the unit price of a single type controller increases. Therefore, there is a method of developing each of a single type dedicated controller and a plurality of types of dedicated controllers. In that case, however, individual development costs are required, and the number is summarized. Otherwise, the unit price cannot be lowered. In addition, when there is more than one type of dedicated controller development, further controller development is required. Therefore, a controller developed for the single type of beverage dispenser described above is provided for each nozzle, and one controller is set as a master and the other controller is set as a master-slave relationship, and both controllers are connected by serial communication. It is proposed. For example, in a beverage dispenser having two beverage nozzles, the control sharing of the master and slave controllers is set as follows.

マスター側のコントローラとスレーブ側のコントローラとはシリアル通信で連携を図り、例えば以下の内容を通信データで相互に交換する。

ここで問題となるのが、各水位レベルになる毎に補正値を既知の所定値に設定する部分である。１口タイプの場合、水位レベルが変化した場合に注出量を所定値に、給水量を０としていた。しかし、２口タイプの場合は、注出量、給水量を夫々のコントローラで算出しているため、例えばノイズや通信線の断線によりマスター側のコントローラとスレーブ側のコントローラとの通信が出来なかった場合、夫々の量をリセットするタイミングが異なると、補正値が本来の値と大きく違ってしまう。 In the two-neck type having two beverage nozzles shown in FIG. 1, one controller (substrate) used for a one-neck type beverage dispenser having one beverage nozzle is used for each nozzle, and one controller is mastered. And design the other controller as a slave.

The controller on the master side and the controller on the slave side cooperate with each other by serial communication. For example, the following contents are mutually exchanged by communication data.

The problem here is that the correction value is set to a known predetermined value every time the water level is reached. In the case of the 1-port type, when the water level changes, the amount dispensed is set to a predetermined value and the water supply amount is set to 0. However, in the case of the two-port type, since the amount of water dispensed and the amount of water supplied are calculated by the respective controllers, for example, communication between the master side controller and the slave side controller could not be performed due to noise or disconnection of the communication line. In this case, if the timing for resetting the respective amounts is different, the correction value is greatly different from the original value.

In order to solve the above problems and achieve the intended object, the invention according to claim 1 has a plurality of beverage nozzles, a water supply valve for supplying water from an external water system to a water supply tank, and the tank In a beverage dispenser in which various electrical control objects such as a float switch for monitoring the water level of the plurality of beverage nozzles are arranged in common,
A master controller that performs electrical control of the various electrical control objects exclusively and electrically controls a first beverage supply element group for supplying beverage to one of the plurality of beverage nozzles;
A slave controller that electrically controls a second beverage supply element group for supplying beverage to the other of the beverage nozzles;
The master controller and the slave controller are connected by serial communication to exchange control data,
When a malfunction occurs in the serial communication between the two controllers, the slave controller cannot know the state of the water supply tank, so the beverage supply from the beverage nozzle controlled by the slave controller is stopped. This is the gist.
According to the first aspect of the present invention, when a malfunction occurs in the serial communication connecting the master controller and the slave controller, the beverage dispensing on the side controlled by the slave controller is stopped. There is no beverage supply on the slave side. Further, since the beverage dispensing on the side controlled by the master controller is continued, there is no great inconvenience to the user.

  According to the present invention, since a controller used for a single type of beverage dispenser can be used for each beverage nozzle of a plurality of types of beverage dispensers, a controller specialized for a plurality of types of beverage dispensers is separately developed. Development costs can be saved. If the serial communication between the master-side controller and the slave-side controller fails, the drink on the slave side is supplied in an uncontrolled state by stopping the beverage supply controlled by the slave-side controller. There is nothing. In addition, since a normally controlled beverage is supplied from the master-side beverage, it is possible to reduce inconvenience to the user.

1 is a front view of a beverage dispenser having two beverage nozzles according to an embodiment of the present invention. It is a right view which shows the internal structure by carrying out the longitudinal direction of the drink dispenser shown in FIG. It is a front view which shows the internal structure of the drink dispenser shown in FIG. In the drink dispenser shown in FIG. 1, it is a front view which shows the state which lifted up the front panel upwards. It is a flowchart figure which shows the master operation | movement of the drink dispenser which has two drink nozzles based on an Example. It is a flowchart figure which shows the slave operation | movement of the drink dispenser which has two drink nozzles based on an Example. It is the block circuit diagram which illustrated that the master controller and slave controller which concern on an Example were connected by serial communication, and illustrated the object controlled by each controller. It is a front view of the coffee server as a drink dispenser provided with a single drink nozzle. It is a vertical side view of the coffee server shown in FIG. It is a flowchart figure which shows the time-dependent operation | movement of the drink dispenser which has the conventional single drink nozzle.

  Next, a preferred embodiment of the present invention will be described with reference to FIGS. In addition, the drink dispenser which concerns on a present Example is multiple types provided with two drink nozzles, Comprising: The drink obtained is miso soup. That is, an Example shows a miso dispenser, The edible raw material is a paste-like miso, and the liquid which dilutes this is hot water. Therefore, the illustrated beverage dispenser includes a tubing pump for supplying miso paste to each beverage nozzle, and a geared motor that rotationally drives the tubing pump. The water supply tank is a hot water storage tank provided with an electric heater for supplying hot water.

  FIG. 1 shows a miso soup dispenser 30 having two beverage nozzles according to the embodiment, and a first beverage nozzle 34 and a second beverage nozzle 36 are spaced apart from each other on the front panel 32. The first beverage nozzle 34 is under the control of a master controller MC, which will be described later, and the second beverage nozzle 36 is under the control of a slave controller SC, which will be described later. In addition, on the operation panel 38, a master dispensing button (first dispensing button) 40 that dispenses beverage from the first beverage nozzle 34 serving as a master and a second beverage nozzle 36 serving as a slave are dispensed. A slave dispensing button (second dispensing button) 42 is also provided. Furthermore, the operation panel 38 is also provided with a master material (here, miso paste) notice release switch 44 and a slave material notice release switch 46.

  Here, the functions of the master and slave material notification release switches 44 and 46 will be briefly described. When the pouring button 40 (42) is pressed once, the hot water is poured out for a preset time, and a geared motor of a slurry pump 60 (62), which will be described later, is rotated. Then, only a necessary amount of paste-like miso is poured out from the beverage nozzle 34 (36). Each time the dispensing button 40 (42) is pressed once, the amount of the edible material dispensed is added to a trip meter (not shown). When the sum of the added amounts exceeds the value preset in the trip meter, the LED built in the release switch 44 (46) is turned on or blinked. That is, since the LED display indicates that the edible raw material cannot be dispensed any more, the manager of the beverage server replaces the edible raw material container with a new one. When the release switch 44 (46) is pressed to reset the count value of the trip meter, the LED is turned off.

  FIG. 2 is a vertical side view of the miso soup dispenser 30 shown in FIG. 1. A water supply tank (hot water storage tank) 48 is provided inside the casing, and an electric heater 50 and a temperature detection thermistor TH are provided at the bottom of the tank. It is arranged. In addition, a float switch FS for detecting the upper and lower limits of the water level and the respective water levels in the middle is provided in the hot water storage tank 48 in multiple stages. As illustrated above, the float switch FS can detect five levels of water levels E, L, C, H, and F from the bottom to the top.

  As shown in FIG. 2, water is supplied to the hot water storage tank 48 via a water supply valve WV from a pipe connected to the external water system. Further, at the front position of the hot water storage tank 48 shown in FIG. 3, a unit of the first dispensing valve 52 and the first dispensing pump 54 connected to the first beverage nozzle 34 serving as a master, and the second beverage nozzle 36 serving as a slave. A unit of a second dispensing valve 56 and a second dispensing pump 58 to be connected is provided so that hot water can be selectively dispensed from the tank 48 to the first beverage nozzle 34 or the second beverage nozzle 36. Yes. In addition, an electrical box EB is provided on the upper right side of FIG. 3, and master and slave controllers described later are housed therein.

  The dispenser 30 of an Example pours miso soup as a drink. Therefore, as shown in FIG. 4, a first slurry pump 60 and a second slurry pump 62 for supplying paste-like miso, which is an edible raw material, to the first or second beverage nozzles 34 and 36 are provided. This slurry pump is for continuously supplying high-viscosity slurry-like articles. For example, by handling a tube containing paste-like miso with a roller rotated by a geared motor, the miso is pumped in one direction. A tubing pump is preferably used.

  In the embodiment of the present invention, a master controller MC that basically controls the first beverage nozzle 34 and a slave controller SC that exclusively controls the second beverage nozzle 36 are provided. Each control data is exchanged by being connected. The control relationship between the master controller MC and the slave controller SC is shown in FIG. That is, in FIG. 7, the master controller MC exclusively controls the display panel DP, the thermistor TH, the float switch FS, the electric heater 50, and the water supply valve WV, and the first control for supplying the beverage to the first beverage nozzle 34. The target (first beverage supply element group) is also controlled. Here, the first beverage supply element group to be controlled first includes the first dispensing button 40, the first dispensing pump 54, the first dispensing valve 52, the first ingredient notification release switch 44, and the first. A slurry pump 60, which is electrically controlled only by the master controller MC. The second beverage supply element group that is the second control target includes the second dispensing button 42, the second dispensing pump 58, the second dispensing valve 56, the second raw material notification release switch 46, and the second slurry. A pump 62, which is electrically controlled only by the slave controller SC.

  The master controller MC and the slave controller SC are connected by serial communication and exchange various data in real time. Here, serial communication is an IT term, and is a communication method in which data is continuously transmitted and received bit by bit between the transmission side and the reception side using one or two lines. This serial communication has the advantage of being simple and low-cost because it can reduce the number of signal transmission paths. However, although the frequency is very low, there is a demerit that mutual communication is unsuccessful.

  The operation of the master controller MC will be described with reference to the flowchart of FIG. The master controller MC includes variables such as the amount of hot water poured out from the first beverage nozzle 34, the amount of water supplied to the hot water storage tank 48, and the amount of hot water poured out from the second beverage nozzle 36. Similarly, the slave controller SC has variables such as the amount of hot water poured out from the second beverage nozzle 36, the amount of water supplied to the hot water storage tank 48, and the amount of hot water poured out from the first beverage nozzle 34.

  First, in step S1 of FIG. 5, it is confirmed whether the water supply valve WV is ON. If the result is affirmative (YES), the process proceeds to step S2 to add the amount of water supplied to the hot water storage tank 48. Next, the process proceeds to step S3, where it is confirmed whether the float switch FS has detected a change in the water level in the hot water storage tank 48. If the result is affirmative (YES), a water level reset (TRUE) flag is set in the hot water storage tank 48 in step S4, and the process proceeds to step S5. Here, the amount of hot water poured out from the hot water storage tank 48 and the amount of water supplied to the tank 48 are not reset.

  In step S5, the current device information is transmitted to the slave controller SC via the serial communication. In the next step S6, it is confirmed whether or not the master controller MC has received data from the slave controller SC. If the confirmation result is affirmative (YES), in the next step S7, it is confirmed whether a flag for resetting the data received from the slave controller SC (TRUE?) Is set. If the result at step S6 is negative (NO), that is, if data is not received from the slave controller SC, the process proceeds to step S8 to check whether a reset (TRUE?) Flag is set. If the result is negative, in step S9, the amount of water dispensed by the second beverage nozzle 36 on the slave side is added to the amount of water dispensed by the first beverage nozzle 34 on the master side. At this time, the amount of extraction on the slave side = 0. If the confirmation result in step S8 is affirmative (YES), a reset flag is set, and in the next step S10, the amount of hot water poured out on the master side is set to a known predetermined amount. , The dispensing amount on the slave side = 0. Then, the reset flag is turned off as reset (= FALSE).

  Returning to step S7, if the reset flag is not raised for the data received from the slave controller SC (No), the amount of hot water dispensed on the slave side is the sum of the received data in step S11. Set. If the reset flag is set for the data received from the slave controller SC in step S7 (YES), in step S12, (1) pouring amount = known predetermined amount, (2) hot water storage tank 48 Set the amount of water supply = 0 and (3) the amount of hot water dispensed on the slave side = the total amount of received data. Then, the reset flag is defeated.

  After the setting in steps S9 to S12, it is checked in step 13 whether there is a hot water pouring signal on the master side. If the result is negative (NO), the process returns to step S1 and the routine is repeated. To do. If there is a signal for pouring hot water to the master side in step S13 (specifically, when the user presses the master pouring button 40), the process proceeds to step S14 as affirmative (YES). Here, the correction of the dispensing time in the first dispensing pump 54 is calculated by the master controller MC. Then, the first pouring pump 54 is rotated for the pouring time corrected in the next step S15, and hot water pouring operation is performed from the first beverage nozzle 34. The amount of hot water poured out in step S15 is stored in the master controller MC in the next step S16. After step S16, the routine returning to step S1 is repeated to wait for the next hot water supply.

From the above, processing of communication data on the master side is summarized as shown in Table 3.

  Next, the operation of the slave controller SC will be described with reference to the flowchart of FIG. Since the slave side does not have the authority to control the water supply valve WV for supplying water to the hot water storage tank 48, the amount of water supply is always 0 ml. In step S1 of FIG. 6, the slave controller SC confirms whether or not it has received data from the master controller MC. If the result is negative (NO), the slave side dispensing amount = 0 in step S2. Set to be. Then, in response to the setting in step S2, the routine returning to step S1 is repeated. If the confirmation result in step S1 is affirmative (YES), the process proceeds to step S3 to confirm whether a reset (TRUE?) Flag is set for the data received from the master controller MC. If the result is negative (NO), the process proceeds to step S4, where the process proceeds to the next step S6, assuming that the amount of hot water dispensed on the master side is the sum of the received data. If it is affirmed (YES) in step S3 that the reset (TRUE?) Flag is set for the data received from the master controller MC, the amount of hot water dispensed on the slave side = 0 in step S5. And the amount of hot water dispensed on the master side = the sum of the received data is set. In either step S4 or step S5, the process proceeds to the next step S6, in which device information on the current slave side is transmitted from the slave controller SC to the master controller MC by the serial communication.

  When the data transmission in step S6 is completed, the process proceeds to the next step S7, and when there is a signal for pouring hot water to the slave side in step S7 (specifically, the slave water injection button 42 is the user (When pressed), the process proceeds to step S8 as affirmative (YES), where the slave controller SC calculates the correction of the dispensing time in the second dispensing pump 58. Then, the second pouring pump 58 is rotated for the pouring time corrected in the next step S9, and hot water is poured out from the second beverage nozzle 36. The added amount of hot water poured out in step S9 is stored in the slave controller SC in the next step S10. After step S10, the routine returning to step S1 is repeated to wait for the next hot water supply.

なお、スレーブ側のコントローラＳＣがマスター側のコントローラＭＣとデータ通信が不調である場合、貯湯タンク４８の状態を前記スレーブコントローラＳＣは知り得ないので、第２飲料ノズル３６からの湯の注出は不可とする。なお、以上の動作から、次の場合であっても正常に補正できる。
(Ａ)通信正常時に水位が変化した場合
マスターコントローラＭＣからスレーブコントローラＳＣにリセット＝ＴＲＵＥを送信し、スレーブコントローラＳＣは注出量＝０ｍｌとする。その後、スレーブコントローラＳＣからマスターコントローラＭＣにリセット＝ＴＲＵＥで返信し、マスターコントローラＭＣはリセット＝ＦＡＬＳＥ、注出量＝所定値、給水量＝０ｍｌとする。これにより前記マスターコントローラＭＣおよびスレーブコントローラＳＣが互いにリセットを認識した上で注出量をリセットすることになるため、正常に補正できる。
(Ｂ)通信異常時に水位が変化した場合
マスターコントローラＭＣは注出量＝所定値、給水量＝０ｍｌ、またスレーブコントローラＳＣの注出量＝０ｍｌとし、湯の注出を可能とする。スレーブコントローラＳＣは注出量＝０ｍｌとし、湯の注出を禁止とする。これにより、マスター側だけでも正常に補正を行って、第１飲料ノズル３４から湯を注出できる。
(Ｃ)通信正常から異常になった場合
マスターコントローラＭＣは注出量にスレーブコントローラＳＣの注出量を加算し、湯の注出を可能とする。スレーブコントローラＳＣは注出量＝０ｍｌとし、湯の注出を禁止とする。これにより前記スレーブコントローラＳＣの通信異常時の動作を、(Ｂ)と同様にでき、かつ通信異常があった前後でマスターコントローラＭＣとスレーブコントローラＳＣの注出量に差を生じること無く、マスターコントローラＭＣだけでも正常に補正を行って、第１飲料ノズル３４から湯を注出できる。 From the above, the communication data processing on the slave side is summarized as shown in Table 4.

If the slave controller SC is in a poor data communication with the master controller MC, the slave controller SC cannot know the state of the hot water storage tank 48. Impossible. From the above operation, even in the following case, it can be corrected normally.
(A) When the water level changes when communication is normal The master controller MC transmits reset = TRUE to the slave controller SC, and the slave controller SC sets the dispense amount = 0 ml. After that, the slave controller SC returns to the master controller MC with a reset = TRUE, and the master controller MC sets the reset = FALSE, the dispensing amount = predetermined value, and the water supply amount = 0 ml. As a result, the master controller MC and the slave controller SC reset each other after recognizing the reset, so that the correction can be made normally.
(B) When the water level changes at the time of communication abnormality The master controller MC sets the amount to be dispensed = predetermined value, the amount of water to be fed = 0 ml, and the amount to be dispensed from the slave controller SC = 0 ml, so that hot water can be poured. The slave controller SC sets the dispensing amount to 0 ml and prohibits the dispensing of hot water. Thereby, only the master side can correct | amend normally and can pour hot water from the 1st drink nozzle 34. FIG.
(C) When communication has become abnormal from normal communication The master controller MC adds the amount of the slave controller SC to the amount of water dispensed, thereby allowing hot water to be dispensed. The slave controller SC sets the dispensing amount to 0 ml and prohibits the dispensing of hot water. As a result, the operation of the slave controller SC in the event of communication abnormality can be performed in the same manner as in (B), and the master controller MC and the slave controller SC can be dispensed with before and after the communication abnormality occurs without causing a difference in the amount of dispensing. Even with MC alone, hot water can be poured out from the first beverage nozzle 34 with normal correction.

34, 36 Beverage nozzle, 48 Water supply tank (hot water storage tank), FS float switch,
MC master controller, SC slave controller, WV water supply valve

Claims (1)

A water supply valve (WV) having a plurality of beverage nozzles (34, 36) and supplying water from an external water system to a water supply tank (48), and a float switch (FS) for monitoring the water level of the tank (48) In the beverage dispenser in which various electrical control objects such as the plurality of beverage nozzles (34, 36) are arranged in common,
A master controller (MC) that performs electrical control of the various electrical control objects exclusively and electrically controls a first beverage supply element group for supplying beverage to one of the plurality of beverage nozzles (34, 36);
A slave controller (SC) that electrically controls a second beverage supply element group for supplying beverage to the other of the beverage nozzles (34, 36);
The master controller (MC) and slave controller (SC) are connected by serial communication to exchange control data,
When the serial communication between the two controllers (MC, SC) has malfunctioned, the slave controller (SC) is not controlled by the slave controller (SC) because it cannot know the state of the water supply tank (48). A beverage dispenser having a plurality of beverage nozzles, wherein the beverage supply from the beverage nozzle (36) is stopped.

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