JP2021181321A - Monitoring device, monitoring method and program for beverage supply system - Google Patents

Abstract

To detect that cleaning has been carried out in a beverage supply system.SOLUTION: Monitoring devices 10, 90, 91 for a beverage supply system 100 receive a detection pressure of a pressure sensor 20, and determines a reference pressure when gas is supplied from a gas supply source 70 to a beverage container 50 and a cock 61 is closed, and a first pressure range including the reference pressure, based on the detection pressure. During a certain time zone in a shop, if the detection pressure satisfies the following conditions: (i)the pressure drops from a first pressure range to below a transient threshold value, then rises above the threshold value; (ii) the pressure is held within a second pressure range that is lower than the reference pressure for a certain length of time or longer; and (iii) thereafter, the pressure drops below the second pressure range, a dispense head 51 is connected to a cleaning liquid tank 80, and a first piping P1 and a beverage dispenser 60 are determined to be cleaned by a cleaning liquid.SELECTED DRAWING: Figure 1

Description

The present application relates to monitoring devices and monitoring methods and programs for beverage supply systems.

For example, in stores such as restaurants, beverage dispensers are often used to serve beverages (eg, beer). For example, Patent Document 1 discloses a beverage dispensing device, a beer barrel, and a gas cylinder that supplies carbon dioxide gas to the beer barrel. The beverage supply conduit connecting the beer barrel and the beverage dispensing device is provided with a temperature sensor for measuring the temperature of the beverage. Further, a pressure adjusting valve and a pressure sensor are provided in the gas conduit connecting the gas cylinder and the beer barrel. In this beverage pouring device, the pressure regulating valve is adjusted so that the gas pressure becomes an appropriate pressure calculated according to the measured temperature of the temperature sensor.

International Publication No. 2008/010454 Japanese Unexamined Patent Publication No. 2019-94085

Beverage dispensers such as those mentioned above must be kept clean so as not to alter the quality of the beverage (eg, taste and aroma). Therefore, various devices for cleaning beverage dispensers are known. For example, Patent Document 2 discloses a system including a beer storage container, a pressurizing source for sending compressed gas to the storage container, a beer dispenser, and a supply pipe connecting the beer dispenser and the storage container. There is. A management device is attached to this system. The management device includes a cleaning mode detector for detecting that the cleaning mode has been executed. In the system of Patent Document 2, beer, water, gas, and beer flow in this order in the supply pipe at the time of washing. Therefore, the cleaning mode detector detects that the cleaning mode has been performed by detecting a change in this fluid in the supply pipe. In order to detect the change in the fluid, the cleaning mode detection unit has, for example, a sensor such as an optical sensor, a capacitance sensor, or a conductivity sensor. Further, since the pressure acting on the wall of the supply pipe changes according to the change of the above-mentioned fluid, the pressure sensor installed on the outer surface of the wall of the supply pipe can also be used as the cleaning mode detection unit.

However, since the optical sensor, capacitance sensor, or conductivity sensor used in Patent Document 2 is attached to the supply pipe through which the beverage passes, the measured value may become unstable due to the adhesion of dirt in the supply pipe. In addition, since the sensor is attached to the supply pipe through which the beverage passes, it is necessary to remove the sensor when the supply pipe is replaced regularly, and at that time, maintenance of the sensor itself is also required. May increase. Therefore, there is a demand for a new method capable of grasping the cleaning implementation status of the dispenser by using a system different from the beverage supply pipe.

It is an object of the present invention to provide a monitoring device, a monitoring method, and a program for a beverage supply system capable of detecting that washing has been performed in consideration of the above-mentioned problems.

One aspect of the present disclosure is a monitoring device for a beverage supply system located in a store, wherein the beverage supply system includes a beverage dispenser having a cock, a first pipe connected to the beverage dispenser, and a beverage container. And the cleaning liquid tank, the gas supply source, the second pipe connected to the gas supply source, the first pipe and the second pipe connected to the first pipe and the second pipe. The monitoring device comprises a dispense head configured to selectively connect to either a beverage container or a cleaning liquid tank and a pressure sensor configured to detect the pressure in the second pipe. , The reference pressure when the pressure sensed by the pressure sensor is received and the gas is supplied from the gas source to the beverage container and the cock is closed, and the first pressure range including the reference pressure, based on the detected pressure. At a certain time in the store, the detection pressure is: (i) Temporarily lower than a certain threshold from the first pressure range, and then rise above the threshold, and (i) The dispense head is in the cleaning liquid tank when ii) is maintained in a second pressure range lower than the reference pressure for a certain period of time or longer, and (iii) is subsequently lowered below the second pressure range. A monitoring device configured to be connected to and to determine that the first pipe and beverage dispenser have been cleaned with a cleaning solution.

As a result of research, the present inventor has found that the detected pressure of the second pipe shows a characteristic profile when cleaning is performed. Specifically, when the dispense head is connected to the cleaning liquid tank and gas starts to be supplied to the cleaning liquid tank, the detected pressure temporarily drops sharply from the first pressure range near the reference pressure and then rises sharply. (Condition (i)). Further, when the cleaning liquid is passed through the first pipe and the beverage dispenser, the detected pressure is maintained in the second pressure range lower than the reference pressure (condition (ii)). Further, when the cleaning liquid tank is emptied and gas is passed through the first pipe and beverage dispenser (ie, when the beverage dispenser is drained), the detection pressure drops below the second pressure range. (Condition (iii)) Therefore, whether or not the detected pressure satisfies the above conditions (i), (ii), and (iii) at a certain time zone (time zone in which washing is expected to be performed) in the store. By determining, it is possible to detect that the cleaning has been performed.

The beverage dispenser may be switchable between a beverage channel for passing the beverage and a foam channel for forming foam from the effervescent beverage, and the monitoring device may have a detection pressure as a condition ( If during ii) it temporarily rises within the second pressure range and then falls, the beverage dispenser is temporarily switched from the beverage channel to the foam channel and the beverage channel and foam flow. Both of the paths may be configured to determine that they have been cleaned with the cleaning solution. In a beverage dispenser having a foam channel, the beverage channel and the foam channel are switched during cleaning in order to clean the foam channel. The present inventor has found that in this case, the detected pressure temporarily rises to a certain pressure. Therefore, according to the above configuration, it is possible to detect that the foam flow path has been washed.

The beverage dispenser may be set to pass a sponge having a size approximately equal to the inner diameter of the first pipe, and the monitoring device may be set to the first after the detection pressure is reduced in the condition (i). When the condition (ii) is maintained as it is by rising to the second pressure range without returning to the pressure range of, it is determined that the first pipe and the beverage dispenser have been washed with the washing liquid and the sponge, and the detected pressure is increased. In condition (i), if the pressure drops back to the first pressure range and then drops to condition (ii), the first pipe and beverage dispenser are cleaned with a cleaning solution without the use of a sponge. It may be configured to determine that it has been done. Beverage dispensers may be cleaned with a sponge in addition to the cleaning solution for better cleaning. In such a beverage dispenser, the present inventor, when the sponge is used for cleaning, the detected pressure is directly maintained in the second pressure range without returning to the first pressure range and the sponge. It has been found that when is not used for cleaning, the detected pressure once returns to the first pressure range and then drops to the second pressure range. Therefore, by determining whether or not the detected pressure returns to the first pressure range under the condition (i), it is possible to determine whether or not the sponge has been used for cleaning.

The monitoring device may be configured to determine that the first tubing and beverage dispenser has been cleaned with the cleaning solution when the detected pressure returns to the first pressure range after the condition (iii). As a result of research, the present inventor has found that the detected pressure returns to the first pressure range at the end of washing. Therefore, in this case, it is possible to more appropriately detect that the cleaning has been performed.

Further, another aspect of the present disclosure is a program for making a computer function as the above-mentioned monitoring device.

Yet another aspect of the present disclosure is a monitoring method for a beverage supply system located in a store, wherein the beverage supply system has a beverage dispenser with a cock and a first pipe connected to the beverage dispenser. , A beverage container, a cleaning liquid tank, a gas supply source, a second pipe connected to the gas supply source, a first pipe and a second pipe connected to the first pipe and the second pipe, and the first pipe and the second pipe. The method comprises a dispense head configured to selectively connect to either a beverage container or a cleaning liquid tank, and a pressure sensor configured to detect the pressure in the second pipe. Receives the detected pressure of the pressure sensor, and based on the detected pressure, the reference pressure when gas is supplied from the gas source to the beverage container and the cock is closed, and the first pressure including the reference pressure. Determining the range and, at a certain time in the store, the detected pressure drops below a certain threshold temporarily from the first pressure range and then rises above the threshold under the following conditions: (i) And, when (iii) the second pressure range lower than the reference pressure is maintained for a certain period of time or more, and (iii) the pressure drops below the second pressure range thereafter. A monitoring method comprising connecting a dispense head to a cleaning liquid tank and determining that the first pipe and beverage dispenser have been cleaned by the cleaning liquid.

According to these programs and monitoring methods, it is possible to detect that cleaning has been performed in the same manner as described above.

According to the present disclosure, it is possible to detect that cleaning has been performed in the beverage supply system.

It is a schematic diagram which shows the beverage supply system which comprises the monitoring device which concerns on embodiment. It is a flowchart which shows the water washing. It is a flowchart which shows the sponge cleaning. FIG. 4A is a graph showing an example of the detected pressure obtained in washing with water. FIG. 4B is a graph showing an example of the detected pressure obtained in sponge cleaning. It is a flowchart which shows the operation of a monitoring device. It is a flowchart which shows the operation of a monitoring device. An example of the image shown on the display unit is shown.

Hereinafter, a monitoring device, a monitoring method, and a program for the beverage supply system according to the embodiment will be described with reference to the accompanying drawings. Throughout a plurality of drawings, similar or corresponding elements are designated by the same reference numerals, and duplicate description is omitted. The scale of the figure is subject to change for ease of understanding.

FIG. 1 is a schematic view showing a beverage supply system 100 including the monitoring device 10 according to the embodiment. For example, the beverage supply system 100 can be placed in a store such as a restaurant to serve beverages. The beverage supply system 100 includes a beverage container 50, a beverage dispenser 60, a gas supply source 70, and a cleaning liquid tank 80.

The beverage container 50 can be, for example, a beer barrel. The beverage container 50 is a beer-flavored effervescent alcoholic beverage made from various beverages (for example, beer and alcoholic carbonated beverages other than beer (for example, effervescent liquor and raw materials other than malt) and mixed with another alcoholic beverage (so-called effervescent alcoholic beverage). It is possible to store a third beer), chu-hi, or high-ball), or a non-alcoholic carbonated beverage (non-alcoholic beer or carbonated juice).

A dispense head 51 is attached to the beverage container 50 via a spear valve (not shown). The dispense head 51 has a fluid inlet 52 and a fluid outlet 53. The fluid inlet 52 is connected to the gas supply source 70 by the pipe P2. The fluid outlet 53 is connected to the beverage dispenser 60 by the pipe P1. The dispense head 51 is configured to be attached to either the beverage container 50 or the cleaning liquid tank 80, and the first pipe P1 and the second pipe P2 are attached to the attached beverage container 50 or the cleaning liquid tank 80. Connecting. The dispense head 51 is usually attached to the beverage container 50 during business hours of the store, and is attached to the cleaning liquid tank 80 at the time of cleaning described later. Further, the dispense head 51 has an operation lever 54. The operating lever 54 is, for example, switchable between two positions (eg, "up" position and "down" position) and is a connection between the fluid inlet 52, the fluid outlet 53 and the beverage container 50 (or cleaning liquid tank 80). Switch states.

For example, in the "up" position, the dispense head 51 shuts off the fluid inlet 52, the inside of the beverage container 50 (or the cleaning liquid tank 80), and the fluid outlet 53 from each other. The "upper" position can be used, for example, when removing the dispense head 51 from the beverage container 50 or the cleaning liquid tank 80.

In the "down" position, the dispense head 51 connects the fluid inlet 52 to the interior of the beverage container 50 (or cleaning fluid tank 80) and connects the interior of the beverage container 50 (or cleaning fluid tank 80) to the fluid outlet 53. Connect (ie, connect the fluid inlet 52 and the fluid outlet 53 through the inside of the beverage container 50 (or cleaning liquid tank 80)). The "lower" position can be used, for example, to supply the beverage in the beverage container 50 to the beverage dispenser 60, or to supply the cleaning liquid in the cleaning liquid tank 80 to the beverage dispenser 60.

The "upper" and "lower" positions of the operating lever 54 in which each connection state is realized are merely examples, and each connection state may be realized in different positions of the operation lever 54. For example, the operating lever 54 may be switchable to, for example, "left" and "right" positions, or other positions, instead of the "up" and "down" positions.

The beverage dispenser 60 is configured to supply the beverage from the beverage container 50 to a container such as a glass. The beverage dispenser 60 has a cock 61. Below the discharge port 62 of the cock 61, a container (not shown) such as a glass is arranged at the time of supplying a beverage, and a relatively large container B such as a bucket is arranged at the time of washing and at the time of exchanging the beverage container 50. The beverage dispenser 60 has a cooling water tank 63, and the cooling water tank 63 accommodates a coiled tube 64 connected to the cock 61. The cooling water tank 63 is cooled by the cooling device 65. With such a configuration, the beverage passing through the coiled tube 64 is cooled. The first pipe P1 is connected to the coiled pipe 64.

In the present embodiment, the beverage dispenser 60 (specifically, the cock 61) includes a beverage channel for passing the beverage and a foam channel for forming foam from the effervescent beverage. The flow path of is selectively connectable to the discharge port 62. The cock 61 includes a valve for opening and closing these flow paths. In the present disclosure, the valve has, for example, a first position (closed position) for closing both the beverage flow path and the foam flow path (to shut off both the beverage flow path and the foam flow path from the discharge port 62). Second position (open position) for opening the beverage flow path (to connect the beverage flow path to the discharge port 62) and to open the foam flow path (to connect the foam flow path to the discharge port 62). It can be set in three positions including the third position (foam position) of. The cock 61 has a handle 61a for selectively moving the valve to one of the above three.

Further, in the present embodiment, the cock 61 can be configured to pass a sponge, whereby the beverage dispenser 60 and the first pipe P1 can be washed using the sponge. For example, the sponge has a size substantially equal to the inner diameter of the first pipe P1. For example, the cock 61 can pass the sponge through the beverage channel by removing the valve from the beverage channel. The configuration for passing the sponge through the cock 61 is not limited to this. When performing cleaning using the sponge, the operator may remove the end of the first pipe P1 from the fluid outlet 53 of the dispense head 51 and insert the sponge into the first pipe P1 from this end. can. The sponge is pushed through the first pipe P1 and the beverage dispenser 60 by the pressurized cleaning liquid. The sponge is discharged from the discharge port 62 together with the cleaning liquid.

The gas supply source 70 can be, for example, a gas cylinder. The gas supply source 70 can supply a gas such as carbon dioxide gas, nitrogen gas, or compressed air. The gas supply source 70 may have a dial 71 for adjusting the pressure of the supplied gas. The cleaning liquid tank 80 contains a cleaning liquid for cleaning the flow path of the beverage. The cleaning liquid can be, for example, water. The cleaning liquid tank 80 is not used when supplying the beverage, and is attached to the dispense head 51 when cleaning the beverage dispenser 60 (details will be described later).

In the beverage supply system 100 as described above, the beverage dispenser 60 and the first pipe P1 are cleaned using the cleaning liquid of the cleaning liquid tank 80. In the present disclosure, cleaning can include, for example, two methods.

FIG. 2 is a flowchart showing water washing. The first cleaning method uses only a cleaning solution (which may also be referred to as "water cleaning" in the present disclosure). Water washing can be performed on a regular basis (eg, a predetermined time zone for each business day of the store (eg, a predetermined period after the end of business hours (eg, minutes to hours))). Before starting the water wash, the dispense head 51 is usually connected to the beverage container 50 and the cock 61 is closed. In water washing, the gas pressure is equal to the pressure for serving the beverage.

With reference to FIG. 2, the operator first sets the operating lever 54 of the dispense head 51 to the “up” position (step S100), and mutually connects the fluid inlet 52, the inside of the beverage container 50, and the fluid outlet 53. To shut off. Subsequently, the operator removes the dispense head 51 from the beverage container 50 (step S102). Subsequently, the operator attaches the dispense head 51 to the cleaning liquid tank 80 containing the cleaning liquid (step S104). The operator sets the container B under the discharge port 62 and confirms that the handle 61a of the cock 61 is in the closed position before supplying the gas to the cleaning liquid tank 80 in the following step S106.

Subsequently, the operator sets the operating lever 54 of the dispense head 51 to the “down” position (step S106). By step S106, the inside of the cleaning liquid tank 80 is connected to the fluid inlet 52 and the fluid outlet 53, and gas is supplied from the gas supply source 70 to the cleaning liquid tank 80.

Subsequently, the operator sets the handle 61a of the cock 61 in the open position, supplies the cleaning liquid from the cleaning liquid tank 80 to the first pipe P1 and the beverage dispenser 60, and supplies the cleaning liquid to the first pipe P1, the coiled pipe 64, and the beverage dispenser 60. The cock 61 (beverage flow path) is washed (step S108). At the time of S108, first, the beverage remaining in the first pipe P1 and the beverage dispenser 60 is pushed out from the discharge port 62, and then the cleaning liquid comes out from the discharge port 62. As a result, the first pipe P1 and the beverage dispenser 60 are washed.

Subsequently, the operator switches the handle 61a of the cock 61 between the open position and the foam position, and cleans the foam flow path (step S110). The operator may repeat step S110 a plurality of times.

When the cleaning liquid tank 80 is emptied, gas is discharged from the discharge port 62. The first pipe P1 and the beverage dispenser 60 are drained (dried) by flowing the gas for a predetermined period (for example, several seconds to several minutes) (step S112). During step S116, the operator may drain both the beverage flow path and the foam flow path of the cock 61 by switching the handle 61a between the open position and the foam position. When the draining is completed, the operator sets the handle 61a of the cock 61 to the closed position (step S114). Further, the operator sets the operating lever 54 of the dispense head 51 to the “up” position (step S116), removes the dispense head 51 from the cleaning liquid tank 80 (step S118), and completes a series of operations. For example, the dispense head 51 may be left removed from the beverage container 50 and the cleaning liquid tank 80 until the next business hours.

Next, FIG. 3 is a flowchart showing sponge cleaning. The second cleaning method uses a sponge in addition to the cleaning solution (which may also be referred to as "sponge cleaning" in the present disclosure). Sponge washes may be performed less frequently than water washes (eg, once every few business days, once a week or a few weeks, or once a month or a few months). For example, the sponge wash may be performed following the water wash or may be performed independently of the water wash. In this embodiment, the sponge wash is described as being performed following the water wash. Therefore, before starting sponge cleaning (ie, after step S118 above), the dispense head 51 has been removed from the beverage container 50 and the cleaning liquid tank 80, and the cock 61 is closed. Also in sponge cleaning, a pressure equal to the pressure for serving the beverage is used as the gas pressure.

With reference to FIG. 3, the operator first attaches the dispense head 51 to the cleaning liquid tank 80 containing the cleaning liquid (step S200). Subsequently, the operator sets the cock 61 so as to pass the sponge (step S202). Specifically, the operator sets the cock 61, for example, so that the valve is removed from the beverage flow path. Subsequently, the operator removes the end of the first pipe P1 from the fluid outlet 53 of the dispense head 51, and inserts a sponge into the first pipe P1 from this end (step S204). After inserting the sponge, the operator reconnects the first pipe P1 to the fluid outlet 53. Before flowing the cleaning liquid in the following step S206, the operator sets the container B under the discharge port 62.

Subsequently, the operator sets the operating lever 54 of the dispense head 51 to the “down” position, whereby the cleaning liquid is simultaneously supplied from the cleaning liquid tank 80 to the first pipe P1 and the beverage dispenser 60, and the cleaning liquid causes the sponge to be generated. The first pipe P1, the coiled pipe 64, and the cock 61 (beverage flow path) are pushed through (step S206). When the cleaning liquid tank 80 is emptied, gas is discharged from the discharge port 62. The gas is allowed to flow for a predetermined period (for example, several seconds to several minutes) to drain the first pipe P1 and the beverage dispenser 60 (step S208). After confirming that the sponge has been discharged into the container B, the operator sets the operating lever 54 of the dispense head 51 in the “up” position (step S210), and removes the dispense head 51 from the cleaning liquid tank 80 (step S212). ). Subsequently, the operator resets the cock 61 as usual so that the valve can close the beverage flow path (step S214), and the series of operations is completed. For example, the dispense head 51 may be left removed from the beverage container 50 and the cleaning liquid tank 80 until the next business hours.

With reference to FIG. 1, the beverage supply system 100 as described above includes a pressure sensor 20 and an internal device (monitoring device) 10 in order to detect that the beverage dispenser 60 and the first pipe P1 have been washed. , Is further equipped.

The pressure sensor 20 detects the pressure in the second pipe P2. For example, the pressure sensor 20 can be attached to a third pipe P3 that is branched from the second pipe P2 and communicates with the second pipe P2 in fluid communication. Since the pressure in the second pipe P2 and the pressure in the third pipe P3 are equal, the pressure sensor 20 detects the pressure in the third pipe P3 to obtain the pressure in the second pipe P2. Can be detected. The pressure sensor 20 is connected to the internal device 10 by wire or wirelessly so as to be able to communicate with the internal device 10, and transmits the detected pressure to the internal device 10.

The internal device 10 is configured to monitor whether the beverage dispenser 60 and the first pipe P1 have been cleaned. That is, in the present embodiment, the internal device 10 functions as a monitoring device. Therefore, in this embodiment, the monitoring device is incorporated in the beverage supply system 100 as a part of the beverage supply system 100. The internal device 10 may be communicably connected to components (not shown) of the beverage supply system 100 other than the pressure sensor 20, and is configured to control some of these components. May be good. The internal device 10 can be, for example, various computers such as a PC, a notebook PC, and a tablet PC. The internal device 10 may include, for example, a processor 11, a storage device 12, a timekeeping unit 13, a display device 14, and an interface 15. The internal device 10 may further include other components (eg, input devices such as touch panels, buttons, mice and / or keyboards). The components of the internal device 10 can be connected to each other via a bus or the like.

The processor 11 can include, for example, at least one of a CPU, MPU, ASIC, LSI, DSP or FPGA. The processor 11 may be configured to perform the processing described later according to the program stored in the storage device 12. The storage device 12 may include, for example, at least one of a hard disk, ROM or RAM. For example, the storage device 12 can store a program executed by the processor 11. Further, the storage device 12 can store the detected pressure of the pressure sensor 20. Also, for example, the storage device 12 can store various parameters such as pressure, pressure range and duration used by the processor 11 as shown below. Further, for example, the storage device 12 may store data of an ID number unique to the beverage supply system 100 (for example, a number indicating a store and / or a number indicating a beverage dispenser 60, etc.). The storage device 12 can store various other information. The timekeeping unit 13 can be realized by, for example, a hardware timer such as a real-time clock and / or a software timer. The timekeeping unit 13 is used to determine whether or not cleaning has been performed, as shown below. The display device 14 can include, for example, a touch panel, a liquid crystal display and / or an organic EL (electro-luminescence) display and the like. The interface 15 can be, for example, an I / O port.

The internal device 10 may be connected to one or a plurality of external devices 90, 91 provided outside the beverage supply system 100 via the network N. Network N is, for example, a communication method based on a communication standard defined by 3GPP (Third Generation PaPsnership Project) such as the Internet, WiFi (registered trademark), Bluetooth (registered trademark), 3G and 4G, or other communication methods. Alternatively, any combination of these can be used, and wired or wireless or a combination thereof can be used. The internal device 10 may transmit various information about the beverage supply system 100 included in the internal device 10 (for example, the determination result shown below, the detected pressure of the pressure sensor 20, etc.) to the external devices 90 and 91. .. The first external device 90 may be, for example, a server owned by a beverage maker that provides a beverage in the beverage container 50. For example, the first external device 90 may be connected to the internal device 10 of the plurality of beverage supply systems 100, or may be configured to manage a plurality of stores. The first external device 90 can be various computers such as a PC, a notebook PC, a tablet PC, etc., and has components such as a processor, a storage device, a display device, and / or an input device. Can be done. The first external device 90 may further have other components. The second external device 91 may be, for example, a mobile terminal owned by a beverage maker and / or a store owner or employee who provides a beverage in the beverage container 50. The second external device 91 can be, for example, various computers such as a PC, a notebook PC, and a tablet PC, and has components such as a processor, a storage device, a display device, and / or an input device. Can be done. The second external device 91 may further have other components.

In the beverage supply system 100 as described above, as a result of research, the present inventor has determined that the pressure of the second pipe P2 detected by the pressure sensor 20 when the above water cleaning and sponge cleaning are performed is as follows. It was found to show a characteristic profile as shown in.

Specifically, FIG. 4A is a graph showing an example of the detected pressure obtained in water washing, and FIG. 4B is a graph showing an example of the detected pressure obtained in sponge washing. The graphs of FIGS. 4A and 4B show that after the dispense head 51 is attached to the cleaning liquid tank 80, immediately before the operating lever 54 of the dispense head 51 is set to the lower position (that is, step S106 and FIG. 2). It starts from (immediately before step S206) in step 3. As shown in FIGS. 4A and 4B, the detected pressure is maintained at a constant reference pressure Ps before the operating lever 54 is set to the lower position. This reference pressure Ps usually corresponds to the set pressure of the gas supply source 70 adjusted by the dial 71. Therefore, the reference pressure Ps waits when gas is supplied from the gas supply source 70 to the beverage container 50 and the cock 61 of the beverage dispenser 60 is closed (that is, the beverage dispenser 60 waits to serve the beverage. Corresponds to the pressure of). Thus, the reference pressure Ps may be calculated, for example, by averaging the detected pressures when the beverage dispenser 60 is waiting to serve the beverage during business hours, or during business hours. It may be determined by obtaining the maximum detected pressure in a certain period.

When the operating lever 54 of the dispense head 51 is set to the lower position and gas starts to be supplied from the gas supply source 70 to the inside of the cleaning liquid tank 80, the detected pressure temporarily drops sharply from the reference pressure Ps, and then It soars (section Sc1). The temporary sudden drop in the detection pressure is caused by attaching the dispense head 51 to the cleaning liquid tank 80, and at the moment when the pressurization of the cleaning liquid tank 80 is started, the space (normal pressure) in the upper part of the cleaning liquid tank 80 where the gas exists is formed. It is considered that the residual gas in the pressurized state in the second pipe P2 is transferred. Regarding the rapid rise in the detected pressure, with reference to FIG. 4 (a), the detected pressure returns to the reference pressure Ps in the water washing, while in the sponge washing, the detected pressure is increased with reference to FIG. 4 (b). It is maintained at a pressure lower than the reference pressure Ps (which may also be referred to as "cleaning pressure" in the present disclosure) Pc without returning to the reference pressure Ps. In water washing, it is considered that the detected pressure returns to the reference pressure Ps because the cock 61 of the beverage dispenser 60 is still closed when the gas starts to be supplied to the washing liquid tank 80. In contrast, in sponge cleaning, the cock 61 is set to pass the sponge when gas begins to be supplied to the cleaning liquid tank 80, and the cleaning liquid is supplied from the cleaning liquid tank 80 to the beverage dispenser 60 at the same time as the gas is supplied. Therefore, it is considered that the detected pressure does not rise to the reference pressure Ps.

With reference to FIG. 4 (a), in water washing, when the handle 61a of the cock 61 is set to the open position after the section Sc1, the washing liquid starts to pass through the first pipe P1 and the beverage dispenser 60. During this period, the detected pressure drops from the reference pressure Ps to the cleaning pressure Pc and is maintained at the cleaning pressure Pc (section Sc2). Further, in the water washing, the handle 61a is temporarily switched from the open position to the foam position, and the foam flow path is washed. At this time, the detected pressure is a pressure from the cleaning pressure Pc at a predetermined ratio (for example, 80 to 99%) with respect to the reference pressure Ps (which may also be referred to as “foam flow path cleaning pressure” in the present disclosure) Pf. Temporarily rises to (Section Sc3). From FIG. 4A, it can be seen that the cleaning of the foam flow path is performed three times.

With reference to FIG. 4B, in the sponge cleaning, the cleaning liquid starts to pass through the first pipe P1 and the beverage dispenser 60 at the same time as the gas is supplied in the period t1, so that the detected pressure is maintained at the cleaning pressure Pc as it is. (Section Sc2).

Further, in both the water cleaning and the sponge cleaning, the length of the section Sc2 depends on the amount of the cleaning liquid contained in the cleaning liquid tank 80. That is, if the cleaning liquid tank 80 contains a larger amount of cleaning liquid, the section Sc2 becomes longer. Further, in both water washing and sponge washing, the length of the section Sc2 depends on the reference pressure Ps. That is, when the reference pressure Ps is higher (that is, when the cleaning liquid is supplied at a higher pressure), the section Sc2 becomes shorter.

With reference to FIG. 4A, in water washing, when the washing liquid tank 80 becomes empty after the section Sc2, gas is discharged from the discharge port 62, and the first pipe P1 and the beverage dispenser 60 are drained (dried). ). During this time, the detected pressure drops from the cleaning pressure Pc (section Sc4). Further, in the water washing, the handle 61a is temporarily switched from the open position to the foam position at the time of draining, and the foam flow path is drained. At this time, the detected pressure increases while decreasing as a whole (section Sc5). From FIG. 4A, it can be seen that the draining of the bubble flow path is performed three times. After draining the section Sc4, the handle 61a of the cock 61 is set in the closed position. As a result, the detected pressure returns to the reference pressure Ps.

With reference to FIG. 4B, in sponge cleaning, when the cleaning liquid tank 80 becomes empty after the section Sc2, gas is discharged from the discharge port 62, and the first pipe P1 and the beverage dispenser 60 are drained. .. During this time, the detected pressure drops from the cleaning pressure Pc (section Sc4). After draining the section Sc4, the operating lever 54 of the dispense head 51 is set in the upper position. As a result, the detected pressure returns to the reference pressure Ps.

Based on the above findings, when water washing or sponge washing is performed, the detected pressure satisfies the following conditions (i) and (ii).
(I) The detected pressure temporarily decreases from the reference pressure Ps and then increases (section Sc1).
(Ii) After that, the detected pressure is maintained at a cleaning pressure Pc lower than the reference pressure Ps for a certain period of time or longer (section Sc2).
(Iii) After that, the detected pressure becomes lower than the cleaning pressure Pc (section Sc4).

Therefore, water washing is performed by determining whether or not the detected pressure satisfies the above conditions (i), (ii), and (iii) at a certain time in the store (time when washing is expected to be performed). Alternatively, it can be detected that sponge cleaning has been performed.

In the present disclosure, in order to determine the condition (i), the processor 11 is based on the detected pressure of the pressure sensor 20, and the pressure when the beverage dispenser 60 is waiting to serve the beverage (that is, the reference pressure). Ps) is determined. Further, since the detected pressure can fluctuate due to various influences such as disturbance, the processor 11 uses the first pressure range Pr1 including the reference pressure Ps as the pressure range that can be regarded as the reference pressure Ps. The first pressure range Pr1 can be, for example, a range of −5% to + 5%, preferably -3% to + 3%, and more preferably -1% to + 1% of the reference pressure Ps. The first pressure range Pr1 may be calculated by the processor 11 based on the reference pressure PS. The first pressure range Pr1 is not limited to the above range, and a person skilled in the art can consider the fluctuation of the detected pressure as a specific reference pressure Ps. Range can be determined.

Further, the processor 11 uses the threshold value Pt to determine the decrease and increase of the detected pressure under the condition (i). For example, the threshold value Pt can be a pressure at a predetermined ratio (for example, about 50%) with respect to the reference pressure Ps. The threshold value Pt may be calculated by the processor 11 based on the reference pressure PS.

As described above, under the condition (i), the detected pressure returns to the reference pressure Ps in the water washing and rises to the washing pressure Pc without returning to the reference pressure Ps in the sponge washing. Since these occur in a relatively short period of time, the processor 11 uses a predetermined period t1 to determine them. The period t1 can be, for example, 0.3 to 3 seconds. Since the period t1 is considered to depend on the length of the second pipe P2, it may be prepared according to the length of the second pipe P2.

The processor 11 uses the second pressure range Pr2 as a pressure range that can be regarded as the cleaning pressure Pc in order to determine the condition (ii). The second pressure range Pr2 can be, for example, a range of a predetermined ratio (for example, about 60 to 80%) with respect to the reference pressure Ps. The second pressure range Pr2 may be calculated by the processor 11 based on the reference pressure PS. However, the upper limit of the second pressure range Pr2 may be higher than the bubble flow path cleaning pressure Pf shown below.

In addition, the processor 11 uses a predetermined period t2 to determine whether the cleaning has been performed for a sufficient period of time under the condition (ii) (that is, whether a sufficient amount of cleaning liquid has been used for cleaning). The period t2 can be, for example, 15 to 65 seconds. As described above, since the period t2 also depends on the reference pressure Ps, it may be preferably prepared according to the reference pressure.

The processor 11 uses a predetermined period t4 to determine whether the detected pressure is lower than the cleaning pressure Pc under the condition (iii) (whether the draining has been performed for a sufficient period of time). The period t4 can be, for example, 5 to 15 seconds.

The processor 11 can also determine various conditions other than the conditions (i), (ii), and (iii).

For example, in water washing, the foam flow path is washed during condition (ii). Therefore, the processor 11 uses the bubble flow path cleaning pressure Pf to determine this. For example, the foam flow path cleaning pressure Pf can be a predetermined ratio with respect to the reference pressure Ps as described above, and may be calculated by the processor 11 based on the reference pressure PS.

Next, the operation of the internal device 10 will be described.

5 and 6 are flowcharts showing the operation of the internal device 10, and show the monitoring method according to the embodiment. For example, prior to the operation shown in FIGS. 5 and 6, the processor 11 allows the beverage dispenser 60 to serve a beverage based on the detected pressure data obtained by the pressure sensor 20 during business hours in the store. The pressure (reference pressure Ps) during standby can be determined. For example, the processor 11 can determine the reference pressure Ps by determining the maximum detected pressure in the last 1 minute before the closing time of business. Further, the internal device 10 calculates at least one of the first pressure range Pr1, the second pressure range Pr2, the threshold value Pt, or the bubble flow path cleaning pressure Pf based on the determined reference pressure Ps. Can be done. The internal device 10 performs the operation shown in FIGS. 5 and 6 based on, for example, the detection pressure data obtained by the pressure sensor 20 at a certain time zone (time zone when cleaning is expected to be performed) in the store. And carry out. For example, the internal device 10 may perform the operation shown in FIG. 5 at a predetermined time on a business day after all the detection pressure data to be used is stored in the storage device 12 (for example, cleaning is performed). Hours after the expected time zone, or hours before business hours on business days, etc.).

The processor 11 determines whether or not the above-mentioned predetermined time has passed based on the time measuring unit 13 (step S300). If it is determined in step S300 that the predetermined time has not passed, the processor 11 repeats step S300 after the predetermined interval.

If it is determined in step S300 that the predetermined time has passed, the processor 11 acquires the detection pressure data of the time zone in which the cleaning is expected to be performed from the storage device 12 (step S302). As described above, since the detected pressure can fluctuate due to various influences such as disturbance, the processor 11 may smooth the acquired detected pressure data by, for example, a calculation such as a moving average.

Subsequently, the processor 11 determines whether or not the detected pressure is lower than the threshold value from the first pressure range Pr1 (step S304). For example, the processor 11 detects the lowest pressure in the detected pressure data, the lowest pressure is smaller than the threshold Pt, and the detected pressure data is within the first pressure range Pr1 before the lowest pressure. It may be determined whether or not the pressure is included. If it is determined in step S304 that the detected pressure does not drop below the threshold value from the first pressure range Pr1, the processor 11 determines that cleaning has not been performed (step S318), and the series of operations ends.

When it is determined in step S304 that the detected pressure has dropped from the first pressure range Pr1 below the threshold value, the processor 11 determines whether or not the detected pressure has returned to the first pressure range Pr1 after the drop ( Step S306). For example, the processor 11 may determine whether or not the data within the period t1 from the above minimum pressure includes the pressure within the first pressure range Pr1. When it is determined in step S306 that the detected pressure has not returned to the first pressure range Pr1 (that is, sponge cleaning), the processor 11 proceeds to A (details will be described later).

When it is determined in step S306 that the detected pressure has returned to the first pressure range Pr1 (that is, washing with water), the processor 11 determines whether or not the detected pressure is maintained in the second pressure range Pr2 for a period of t2 or more. (Step S308). For example, the processor 11 may determine whether or not the detected pressure data includes the pressure in the second pressure range Pr2 for a period t2 or more continuously after the above-mentioned minimum pressure. When it is determined in step S308 that the detected pressure is not maintained in the second pressure range Pr2 for the period t2 or more, the processor 11 determines that cleaning has not been performed (step S318), and the series of operations ends.

When it is determined in step S308 that the detected pressure is maintained in the second pressure range Pr2 for a period of t2 or more, the processor 11 temporarily causes the data in the second pressure range Pr2 detected in step S308 to flow. It is determined whether or not the road cleaning pressure has risen to Pf (step S310). For example, in the processor 11, whether or not the data in the second pressure range Pr2 includes a pressure equal to or higher than the bubble flow path cleaning pressure Pf and contains a pressure smaller than the bubble flow path cleaning pressure Pf before and after this pressure. May be determined.

When it is determined in step S310 that the data in the second pressure range Pr2 temporarily rises to the bubble flow path cleaning pressure Pf, the processor 11 determines that the detected pressure data is the data in the second pressure range Pr2. It is determined whether or not it has decreased after that (step S312). For example, the processor 11 determines whether or not the detected pressure data contains a pressure smaller than the second pressure range Pr2 for a continuous period of t4 or more after the data in the second pressure range Pr2. You may judge.

When it is determined in step S312 that the detected pressure data is lower than the data in the second pressure range Pr2 (that is, when drainage is performed), the processor 11 is flushed with water (cleaning of the beverage flow path). , All of cleaning and drying of the foam flow path) is determined to have been properly performed (step S314), and a series of operations is terminated.

If it is determined in step S312 that the detected pressure data did not drop after the data in the second pressure range Pr2 (ie, no draining was performed), the processor 11 is inadequately cleaned. (Step S316), and the series of operations is terminated.

When it is determined in step S310 that the data in the second pressure range Pr2 does not temporarily rise to the bubble flow path cleaning pressure Pf (that is, when the bubble flow path cleaning is not performed), the processor 11 , It is determined that the cleaning is insufficient (step S316).

FIG. 6 shows the operation after A in FIG. With reference to FIG. 6, the processor 11 determines whether or not the detected pressure is maintained in the second pressure range Pr2 for a period t2 or more (step S400). Step S400 can be similar to step S308. When it is determined in step S400 that the detected pressure is not maintained in the second pressure range Pr2 for the period t2 or more, the processor 11 determines that cleaning has not been performed (step S408), and the series of operations ends.

If it is determined in step S400 that the detected pressure is maintained in the second pressure range Pr2 for a period of t2 or more, the processor 11 determines whether the detected pressure data is lower than the data in the second pressure range Pr2. (Step S402). Step S402 can be the same as step S312.

If it is determined in step S402 that the detected pressure data drops after the data in the second pressure range Pr2 (ie, if draining has been performed), the processor 11 has properly performed sponge cleaning. After making a determination (step S404), a series of operations is terminated.

If it is determined in step S402 that the detected pressure data did not drop after the data in the second pressure range Pr2 (ie, no draining was performed), the processor 11 is inadequately cleaned. (Step S406), and the series of operations is terminated. The internal device 10 may be configured to transmit the determination results of steps S314, S316, S318, S404, S406, and S408 to the external devices 90 and 91.

FIG. 7 shows an example of an image shown on the display device 14. The internal device 10 may be configured to show the determination result 131 of the above steps S314, S316, S318, S404, S406, and S408 on the display device 14. Similar images may be displayed on the external devices 90, 91. For example, "OK (W)" indicates that water washing was properly performed (step S314), "OK (S)" indicates that sponge washing was properly performed (step S404), and "Poor". "" Indicates that the cleaning is insufficient (steps S316 and S406), and "X" indicates that the cleaning is not performed (steps S318 and S408). For example, the determination result 131 may be shown on a daily basis. Further, for example, the internal device 10 may display various other information on the display device 14. For example, the internal device 10 may indicate a result 132 for continuous cleaning days and / or a target 133 for the number of days remaining until good store certification. Further, for example, the internal device 10 may display the allowable range 134 of the reference pressure Ps and / or the detected pressure 135 of the pressure sensor 20. Further, for example, the internal device 10 may indicate a gas pressure state 136 (for example, GOOD or BAD) indicating whether or not the detected pressure 135 is within the allowable range 134.

According to the internal device 10, the program, and the monitoring method according to the above-described embodiment, the detected pressure temporarily drops sharply from the first pressure range Pr1 during the time when cleaning is expected to be performed. Whether or not the pressure has risen sharply thereafter (that is, whether or not the drink head 51 is connected to the cleaning liquid tank 80 and gas starts to be supplied to the cleaning liquid tank 80) (condition (i)), the detected pressure is in the second pressure range. Whether or not it was maintained in Pr2 (that is, whether or not the cleaning liquid was passed through the first pipe P1 and the beverage dispenser 60) (condition (ii)), and thereafter the detected pressure was higher than that of the second pressure range Pr2. Whether or not the pressure has decreased (that is, whether or not the cleaning liquid tank 80 has been emptied and the gas has been passed through the first pipe P1 and the beverage dispenser 60) (condition (iii)) is determined. Therefore, it is possible to detect that washing has been performed in the beverage supply system 100. Further, according to the above configuration, when gas is supplied from the gas supply source 70 to the beverage container 50 and the cock 61 of the beverage dispenser 60 is closed (that is, the beverage dispenser 60 waits to serve the beverage. The reference pressure Ps is determined based on the detected pressure (when). Normally, the reference pressure Ps corresponds to the set pressure of the gas supply source 70, but this set pressure may vary from store to store. Therefore, according to the above configuration, the reference pressure Ps can be automatically determined even when the set pressure of the gas supply source 70 differs depending on the store. Therefore, the reference pressure Ps required for the determination can be automatically obtained.

Further, in the above embodiment, the beverage dispenser 60 can be switched between a beverage flow path for passing the beverage and a foam flow path for forming foam from the effervescent beverage, and the internal device 10 has an internal device 10. , If the detected pressure temporarily rises within the second pressure range Pr2 during condition (ii) and then falls, the beverage dispenser 60 temporarily switches from the beverage flow path to the foam flow path. Therefore, it is determined that both the beverage flow path and the foam flow path have been washed with the washing liquid. Therefore, it can be detected that the foam flow path has been washed.

Further, in the above embodiment, the beverage dispenser 60 can be set so as to pass a sponge having a size substantially equal to the inner diameter of the first pipe P1, and the internal device 10 has a detection pressure as a condition (i). In the case where, after the decrease, the pressure rises to the second pressure range Pr2 without returning to the first pressure range Pr1 and the condition (ii) is maintained as it is, the first pipe P1 and the beverage dispenser 60 use the cleaning liquid. And when it is determined that the pressure has been washed by the sponge, and the detected pressure drops to the first pressure range Pr1 in the condition (i) and then drops to the condition (ii), the first pipe is used. It is configured to determine that the P1 and the beverage dispenser 60 have been washed with the washing liquid without using a sponge. Therefore, it can be determined whether the sponge has been used for cleaning.

Further, in the above embodiment, as shown in FIG. 7, the cleaning situation is visualized. By visualizing the cleaning status in this way, it is possible to appropriately perform cleaning management of the beverage dispenser 60 at each store. Further, in the above embodiment, it is possible to acquire data on the cleaning status that contributes to the improvement of beverage quality by a low cost and simple configuration. For example, when the external device 90 manages a plurality of stores. , It may be possible to provide guidance and suggestions on cleaning methods at multiple stores.

Although the monitoring device and monitoring method for the beverage supply system and the embodiment of the program have been described, the present invention is not limited to the above embodiment. Those skilled in the art will appreciate that various variations of the above embodiments are possible. Also, one of ordinary skill in the art will appreciate that the above operations need not be performed in the above order and can be performed in any other order as long as there is no contradiction.

For example, in the above embodiment, the internal device 10 functions as a monitoring device. However, in other embodiments, the external devices 90, 91 may function as monitoring devices. For example, the external devices 90, 91 may be configured to receive the detected pressure of the pressure sensor 20 via the network N or by other methods (eg, via the storage medium) and various parameters (eg, via the storage medium). , Reference pressure Ps, first pressure range Pr1, second pressure range Pr2, threshold Pt, and / or bubble flow path cleaning pressure Pf), and the operations shown in FIGS. May be good.

Further, referring to FIGS. 4A and 4B, when the handle 61a of the cock 61 is set to the closed position after the draining of the section Sc4 as described above, the detected pressure returns to the reference pressure Ps. In other words, when the water washing and the sponge washing are completed, the detected pressure returns to the reference pressure Ps. Thus, for example, the processor 11 may, at appropriate times during the above operation (eg, before or after each of steps S314, S316, S318, S404, S406, S408), have a detection pressure first after section Sc4. It may be determined whether or not the pressure range has returned to Pr1. When it is determined that the detected pressure has returned to the first pressure range Pr1, for example, the processor 11 may determine that water washing or sponge washing has been properly performed. In contrast, if it is determined that the detected pressure has not returned to the first pressure range Pr1, for example, the processor 11 is inadequately washed with water or sponge, or the cock 61 remains open. , May be determined. In this case, it is possible to more appropriately detect that the cleaning has been performed.

10 Internal device (monitoring device)
20 Pressure sensor 50 Beverage container 51 Dispens head 60 Beverage dispenser 61 Cock 70 Gas supply source 80 Cleaning liquid tank 90 First external device (monitoring device)
91 Second external device (monitoring device)
100 Beverage supply system P1 1st pipe P2 2nd pipe Ps Reference pressure Pt Threshold

Claims (6)

A monitoring device for beverage supply systems located in stores
The beverage supply system is
Beverage dispenser with cook and
The first pipe connected to the beverage dispenser and
Beverage container and
Cleaning liquid tank and
Gas source and
The second pipe connected to the gas supply source and
It is connected to the first pipe and the second pipe, and is configured to selectively connect the first pipe and the second pipe to either the beverage container or the cleaning liquid tank. With the dispense head,
A pressure sensor configured to detect the pressure in the second pipe, and
Equipped with
The monitoring device is
Receives the detected pressure of the pressure sensor
Based on the detected pressure, a reference pressure when gas is supplied from the gas supply source to the beverage container and the cock is closed, and a first pressure range including the reference pressure are determined.
At a certain time in the store, the detected pressure is as follows:
(I) Temporarily lower than a certain threshold value from the first pressure range, and then rise above the threshold value, and
(Ii) It is maintained in a second pressure range lower than the reference pressure for a certain period of time or longer, and
(Iii) After that, the pressure drops below the second pressure range.
When the condition is satisfied, the dispense head is connected to the cleaning liquid tank, and it is determined that the first pipe and the beverage dispenser have been cleaned by the cleaning liquid.
A monitoring device configured to. The beverage dispenser is switchable between a beverage channel for passing the beverage and a foam channel for forming foam from the effervescent beverage.
In the monitoring device, when the detected pressure temporarily increases within the second pressure range during the condition (ii) and then decreases, the beverage dispenser moves from the beverage flow path to the beverage channel. The monitoring device according to claim 1, wherein the monitoring device is configured to be temporarily switched to the foam flow path and to determine that both the beverage flow path and the foam flow path have been washed by the cleaning liquid. The beverage dispenser can be set so as to pass a sponge having a size substantially equal to the inner diameter of the first pipe.
The monitoring device is
When the detected pressure rises to the second pressure range without returning to the first pressure range after the decrease in the condition (i), and the condition (ii) is maintained as it is. It is determined that the first pipe and the beverage dispenser have been washed with the washing liquid and the sponge.
When the detected pressure returns to the first pressure range after the decrease in the condition (i) and then decreases to the condition (ii), the first pipe and the beverage dispenser are used. The monitoring device according to claim 1 or 2, wherein it is determined that the product has been washed with a cleaning liquid without using a sponge. The monitoring device is
A claim is made so that when the detected pressure returns to the first pressure range after the condition (iii), it is determined that the first pipe and the beverage dispenser have been washed with the washing liquid. The monitoring device according to any one of 1 to 3. A program for operating a computer as a monitoring device according to any one of claims 1 to 4. A monitoring method for beverage supply systems located in stores,
The beverage supply system is
Beverage dispenser with cook and
The first pipe connected to the beverage dispenser and
Beverage container and
Cleaning liquid tank and
Gas source and
The second pipe connected to the gas supply source and
It is connected to the first pipe and the second pipe, and is configured to selectively connect the first pipe and the second pipe to either the beverage container or the cleaning liquid tank. With the dispense head,
A pressure sensor configured to detect the pressure in the second pipe, and
Equipped with
The monitoring method is
Receiving the detected pressure of the pressure sensor and
Based on the detected pressure, a reference pressure when gas is supplied from the gas supply source to the beverage container and the cock is closed, and a first pressure range including the reference pressure are determined. When,
At a certain time in the store, the detected pressure is as follows:
(I) Temporarily lower than a certain threshold value from the first pressure range, and then rise above the threshold value, and
(Ii) Maintained in a second pressure range lower than the reference pressure for a certain period of time or longer, and
(Iii) After that, the pressure drops below the second pressure range.
When the condition is satisfied, it is determined that the dispense head is connected to the cleaning liquid tank and the first pipe and the beverage dispenser are cleaned by the cleaning liquid.
Monitoring methods, including.

Images