JP6660126B2 - Liquid filling device and method of sterilizing liquid filling device - Google Patents

Description

  The present invention relates to a liquid filling device for filling a product container with a liquid and a method for sterilizing the liquid filling device.

  2. Description of the Related Art Conventionally, in a liquid filling apparatus that fills a product container such as a barrel or a bottle with a liquid such as beer, a pipe through which the liquid passes is regularly sterilized (for example, see Patent Document 1). This sterilization is performed by circulating a sterilizing solution through a pipe.

JP-A-02-281994 JP 2013091018 A

  In recent years, in order to improve the efficiency of equipment, a liquid filling apparatus has been considered in which a plurality of system pipes for supplying different types of liquids are connected to a common pipe to which a filler is connected. In this liquid filling apparatus, by connecting any one of the plurality of system pipes to the collective pipe, it is possible to fill the product container with a desired liquid while preventing mixing of different liquids.

  However, when the sterilization method described in Patent Literature 1 is applied to a liquid filling apparatus including a plurality of system pipes, the sterilization liquid is supplied to both the collective pipe and any of the system pipes. In this way, even in a sterilization step in which sterilization of the collecting pipe is unnecessary, the sterilizing liquid is supplied to the collecting pipe, and when the liquid is filled from the filler to the product container, the sterilizing liquid is supplied to other system pipes. Therefore, the system piping cannot be sterilized.

  Patent Document 2 describes a technique in which pipes between an upstream tank and a downstream tank for storing a product liquid are arranged in parallel, and each pipe is sequentially sterilized. However, the technique described in Patent Literature 2 is not a liquid filling device that fills a product container with liquid. Further, since the pipes arranged in parallel are not a plurality of system pipes for supplying different types of liquids, there is no problem of mixing different liquids. For this reason, the technique described in Patent Document 2 cannot be applied to a liquid filling device including a plurality of system pipes.

  Therefore, an object of the present invention is to provide a liquid filling apparatus and a method for sterilizing a liquid filling apparatus that can reduce the time for sterilizing system piping.

  The liquid filling apparatus according to the present invention includes a plurality of system pipes for circulating different kinds of liquids, a filler for filling any one kind of liquid in a product container, and a kind of liquid connected to the filler and circulating any kind of liquid. Collective piping, a sterilizing solution supply device that supplies a sterilizing solution, a bypass pipe connected to the sterilizing solution supply device to circulate the sterilizing solution, a plurality of system piping, a plurality of systems connected to the collecting piping and the bypass piping, A switching unit that switches a combination that connects the pipe, the collective pipe, and the bypass pipe.

  In the liquid filling device according to the present invention, since the bypass pipe connected to the sterilizing liquid supply device is connected to the switch, the sterilizing liquid bypasses the filler and the collective pipe, and circulates in any system pipe. be able to. Therefore, when the product container is filled with the liquid from the filler, the sterilizing solution can be circulated through the other system piping to sterilize the system piping. Thereby, the time for sterilizing the system piping can be reduced.

  In this case, the switch can communicate any one of the plurality of system pipes with the collective pipe, and can communicate any one of the plurality of system pipes with the bypass pipe. May be possible. In this liquid filling apparatus, one of the plurality of system pipes is connected to each of the collecting pipe and the bypass pipe. Therefore, mixing of different liquids can be prevented.

  The apparatus further includes a return pipe connected to the collective pipe to circulate the sterilizing solution, and the switch is connected to the collective pipe, a plurality of system pipes, a bypass pipe, and the return pipe, and collectively has a collective pipe, a plurality of system pipes, and a bypass. You may switch the combination which connects a piping and a return piping. In this liquid filling apparatus, since the return pipe is connected to the collecting pipe and the switch, the sterilizing solution can be circulated not only in any system pipe but also in the collecting pipe. Thereby, both the system piping and the collective piping can be sterilized.

  In this case, the switching device can communicate any one of the plurality of system pipes with the collective pipe, and any one of the plurality of system pipes or the return pipe and the bypass pipe. May be able to communicate. In this liquid filling apparatus, any one of the plurality of system pipes is connected to the collective pipe, and any one of the plurality of system pipes or the return pipe is connected to the bypass pipe. Therefore, mixing of different liquids can be prevented.

  In addition, the collecting pipe is connected to the upstream side of the filler in the liquid circulation direction and supplies the liquid to the filler, and the first collecting pipe is connected to the downstream side of the filler in the liquid circulation direction to collect the liquid from the filler. And a second collective pipe, having a bypass pipe, a first bypass pipe connected to an upstream side of the sterilizing solution supply device in the circulation direction of the sterilizing solution and collecting the sterilizing solution in the sterilizing solution supply device, A second bypass pipe connected to the downstream side of the sterilizing solution supply device in the circulation direction and supplied with the sterilizing solution from the sterilizing solution supply device, and the switch includes a first collecting pipe, a plurality of system pipes, and a second You may have the 1st switch which connects one bypass piping mutually, and the 2nd switch which connects the 2nd collective piping, a plurality of system piping, and the 2nd bypass piping mutually. In this liquid filling apparatus, the collecting pipe has a first collecting pipe and a second collecting pipe, the bypass pipe has a first bypass pipe and a second bypass pipe, and the switch is a first switch and a second switch. , The liquid and the sterilizing liquid can be appropriately circulated.

  In addition, the collecting pipe is connected to the upstream side of the filler in the liquid circulation direction and supplies the liquid to the filler, and the first collecting pipe is connected to the downstream side of the filler in the liquid circulation direction to collect the liquid from the filler. And a second collective pipe, having a bypass pipe, a first bypass pipe connected to an upstream side of the sterilizing solution supply device in the circulation direction of the sterilizing solution and collecting the sterilizing solution in the sterilizing solution supply device, A second bypass pipe connected to the downstream side of the sterilizing solution supply device in the circulation direction and supplied with the sterilizing solution from the sterilizing solution supply device, and the return pipe includes any one of the first collecting pipe and the second collecting pipe. A first return pipe connected to one of the pipes to collect the sterilizing liquid from the pipe, and a pipe connected to the first return pipe of the first collective pipe and the second collective pipe connected to the first return pipe. A second return pipe for supplying the bacterial solution, and the switch connects the first collective pipe, the plurality of system pipes and the first bypass pipe to each other, and connects the first bypass pipe and the first return pipe. And a second switch connecting the second collecting pipe, the plurality of system pipes and the second bypass pipe to each other, and connecting the second bypass pipe and the second return pipe. Good. In this liquid filling apparatus, the collecting pipe has a first collecting pipe and a second collecting pipe, the bypass pipe has a first bypass pipe and a second bypass pipe, and the switch is a first switch and a second switch. And the return pipe has the first return pipe and the second return pipe, whereby the liquid and the sterilizing liquid can be appropriately circulated.

  Further, the switch has a base portion formed with a plurality of holes communicating with each of a plurality of pipes connected to the switch, and a pair of first and second holes among the plurality of holes. By being attached, the communication pipe that communicates the first hole and the second hole, and when the communication pipe is attached to the first hole and the second hole, the communication pipe is detected by being disposed near the communication pipe. And a proximity sensor that performs the operation. In this liquid filling device, the position where the communication pipe is attached can be confirmed from the output of the proximity sensor. Accordingly, it is possible to prevent mixing of different liquids due to incorrectly attaching the communication pipe.

  Further, the switch may be a swing bend. In this liquid filling apparatus, since the switching device is a swing bend, it is possible to easily switch the communication path while preventing the communication pipe from being attached by mistake.

  Further, a liquid tank for storing a liquid to be circulated may be attached to the system piping, and a common measuring instrument for measuring a measurement item common to a plurality of types of liquids may be attached to the collective piping. In this liquid filling device, different liquid mixing can be prevented by attaching the liquid tank for each liquid to the system piping, and reducing common instruments by providing common instruments in the collective piping Can be.

  The sterilization method of the liquid filling device according to the present invention includes a plurality of system pipes for circulating different types of liquids, a filler for filling any one type of liquid into a product container, and any one type of liquid connected to the filler. A collecting pipe for circulating the sterilizing liquid, a sterilizing liquid supply device for supplying the sterilizing liquid, a bypass pipe connected to the sterilizing liquid supplying apparatus and circulating the sterilizing liquid, and a plurality of system pipes, connected to the collecting pipe and the bypass pipe, A switching device that switches a combination for communicating a plurality of system pipes, a collective pipe, and a bypass pipe, and a sterilization method for a liquid filling apparatus, the sterilization method comprising: A first sterilization step for sterilization is provided, and in the first sterilization step, a switch communicates any one of the plurality of system pipes with the collecting pipe, and a plurality of systems. Communicating the pipe and the bypass pipe communicating with the pipe assembly of the piping.

  In the method for sterilizing a liquid filling device according to the present invention, the sterilizing solution can circulate in any system piping, bypassing the collective piping. Therefore, when the product container is filled with the liquid from the filler, the sterilizing solution can be circulated through the other system piping to sterilize the system piping. Thereby, the time for sterilizing the system piping can be reduced.

  In this case, the liquid filling apparatus further includes a return pipe connected to the collecting pipe to circulate the sterilizing liquid, and the switch is connected to the collecting pipe, the plurality of system pipes, the bypass pipe, and the return pipe, and The combination for switching the plurality of system pipes, the bypass pipe and the return pipe is switched, and the sterilization method includes a second sterilization step of sterilizing the system pipe and the collective pipe. Any one of the pipes may communicate with the collective pipe, and the return pipe and the bypass pipe may communicate. According to the method for sterilizing a liquid filling apparatus, the sterilizing solution can be circulated not only in any system piping but also in a collective piping. Thereby, both the system piping and the collective piping can be sterilized.

  ADVANTAGE OF THE INVENTION According to this invention, the time for sterilizing system piping can be reduced.

It is a piping flow figure showing the liquid filling device of this embodiment. It is a schematic front view showing a part of switch. It is a schematic side view which shows a part of switch. It is a figure for explaining arrangement of a communicating pipe. It is a piping flowchart which shows the state which sterilizes a beer system piping in a 1st sterilization process. It is a piping flowchart which shows the state which sterilizes RTD system piping in a 1st sterilization process. It is a piping flowchart which shows the state which sterilizes both a beer system piping and a collective piping in a 2nd sterilization process. It is a piping flowchart which shows the state which sterilizes both RTD system piping and collective piping in a 2nd sterilization process. FIG. 4 is a piping flow diagram illustrating a liquid filling device of a comparative example. It is a piping flow figure showing the state where the piping is sterilized in the liquid filling device of a comparative example. It is a piping flow figure showing the state where the piping is sterilized in the liquid filling device of a comparative example.

  Hereinafter, preferred embodiments of a liquid filling apparatus and a method for sterilizing a liquid filling apparatus according to the present invention will be described in detail with reference to the drawings. In all the drawings, the same or corresponding parts have the same reference characters allotted.

  FIG. 1 is a piping flow diagram illustrating the liquid filling device of the present embodiment. As shown in FIG. 1, the liquid filling device 1 of the present embodiment includes a plurality of system pipes 2, a filler 3, a collective pipe 4, a sterilizing liquid supply device 5, a bypass pipe 6, a return pipe 7, A switching unit 8.

  The plurality of system pipes 2 are pipes for circulating different types of liquids. Here, as the different types of liquids, beer-taste beverages such as beer, low-malt beer, third beer, RTD (Ready to Drink) such as liqueurs and spirits, and liquids such as soft drinks can be employed. . In addition, even if it is a drink (for example, beer) of the same classification, if the brand etc. differ, it will become a different kind of liquid. RTD is a general term for low-alcohol beverages such as sour-based alcoholic beverages that can be opened and drunk as they are. In the present embodiment, two types of liquid, beer and RTD, are used as different types of liquid. For this reason, the system piping 2 has a beer system piping 2A for circulating beer, and an RTD system piping 2B for circulating the RTD.

  One end of the beer system pipe 2A is connected to the first switch 8A of the switch 8. The other end of the beer system pipe 2 </ b> A is connected to the second switch 8 </ b> B of the switch 8. The first switch 8A and the second switch 8B of the switch 8 will be described later. The beer system pipe 2A includes a beer tank 21A that stores beer, a valve 22A that supplies beer stored in the beer tank 21A to the beer system pipe 2A, and a pump 23A that sends out beer in the beer system pipe 2A. Installed. As the valve 22A, for example, a mix proof valve can be used. In addition, beer system piping 2A may be additionally provided with a part or all of the equipment for producing beer, a beer-specific measuring instrument, and the like.

  One end of the RTD system pipe 2B is connected to a first switch 8A of the switch 8. The other end of the RTD system pipe 2 </ b> B is connected to the second switch 8 </ b> B of the switch 8. The RTD system pipe 2B includes an RTD tank 21B that stores the RTD, a valve 22B that supplies the RTD stored in the RTD tank 21B to the RTD system pipe 2B, and a pump 23B that sends out the RTD in the RTD system pipe 2B. Installed. As the valve 22B, for example, a mix proof valve can be used. Note that, in addition to the above, a part or all of the equipment for manufacturing the RTD, an RTD-specific measuring instrument, and the like may be attached to the RTD system piping 2B.

  The filler 3 is a device that fills a product container (not shown) with any one liquid of beer or RTD. Barrels, bottles, cans, plastic bottles, and the like are used as product containers for filling beer or RTD. As the filler 3, various known devices can be used.

  The collecting pipe 4 is a pipe that circulates any one type of liquid, such as beer or RTD. The collecting pipe 4 communicates with the filler 3, and can supply beer or RTD to the filler 3 and collect liquid from the filler 3. The collective pipe 4 includes a first collective pipe 4A that supplies a liquid to the filler 3, and a second collective pipe 4B that collects the liquid from the filler 3.

  One end of the first collecting pipe 4A is connected to the upstream side of the filler 3 in the liquid circulation direction. The other end of the first collecting pipe 4A is connected to the first switch 8A of the switch 8. The first collecting pipe 4A is in communication with the filler 3 so that a liquid can be supplied to the filler 3. The main pipe measuring device AP, the dissolved oxygen concentration measuring device DO, and the thermometer TP are attached to the first collecting pipe 4A. The main measuring device AP, the dissolved oxygen concentration measuring device DO, and the thermometer TP are common measuring devices that measure measurement items common to a plurality of types of liquids such as beer and RTD. In addition, other common measuring instruments etc. may be attached to the first collecting pipe 4A, in addition to the main measuring instrument AP, the dissolved oxygen concentration measuring instrument DO and the thermometer TP.

  One end of the second collecting pipe 4B is connected to the downstream side of the filler 3 in the liquid circulation direction. The other end of the second collecting pipe 4B is connected to the second switch 8B of the switch 8. The second collecting pipe 4 </ b> B communicates with the filler 3 so that the liquid can be recovered from the filler 3. A valve 9A and a valve 9B for connecting the return pipe 7 to the second collective pipe 4B are attached to the second collective pipe 4B. As the valve 9A and the valve 9B, for example, a mix proof valve can be used. The valve 9B is located downstream of the valve 9A in the liquid circulation direction. Further, the valve 9B is preferably located near the valve 9A. Note that, in addition to the valve 9A and the valve 9B, a common measuring instrument or the like may be attached to the second collecting pipe 4B.

  The sterilizing solution supply device 5 is a device that supplies a sterilizing solution to the pipe. The sterilizing solution supply device 5 may be a device including a tank for storing the sterilizing solution, or may be a device that only supplies the sterilizing solution without including such a tank. The sterilizing liquid is a liquid that cleans and sterilizes the piping of the liquid filling device. As the germicidal solution, a chemical such as chlorine, an acid, hot water or the like is used.

  The bypass pipe 6 is a pipe for circulating a sterilizing solution. The bypass pipe 6 is connected to the sterilizing liquid supply device 5 and the switch 8 so that the sterilizing liquid can bypass the collecting pipe 4 and circulate in the system pipe 2. The bypass pipe 6 has a first bypass pipe 6A for collecting the sterilizing liquid in the sterilizing liquid supply device 5, and a second bypass pipe 6B for supplying the sterilizing liquid from the sterilizing liquid supply apparatus 5.

  One end of the first bypass pipe 6A is connected to the upstream side of the sterilizing solution supply device 5 in the circulation direction of the sterilizing solution. The other end of the first bypass pipe 6A is connected to the first switch 8A of the switch 8. The first bypass pipe 6 </ b> A is connected to the sterilizing solution supply device 5 so that the sterilizing solution supply device 5 can collect the sterilizing solution. A valve 61A for opening and closing the flow path of the first bypass pipe 6A is attached to the first bypass pipe 6A. The valve 61A is preferably attached near the first switch 8A.

  One end of the second bypass pipe 6B is connected to the downstream side of the sterilizing solution supply device 5 in the circulation direction of the sterilizing solution. The other end of the second bypass pipe 6B is connected to the second switch 8B of the switch 8. The second bypass pipe 6 </ b> B is connected to the sterilizing solution supply device 5 so that the sterilizing solution is supplied from the sterilizing solution supply device 5. A valve 61B for opening and closing the flow path of the second bypass pipe 6B is attached to the second bypass pipe 6B. The valve 61B is preferably mounted near the second switch 8B.

  The return pipe 7 is a pipe for circulating a sterilizing solution. The return pipe 7 is connected to the collective pipe 4 and the switch 8 so that the sterilizing solution that has bypassed the collective pipe 4 by the bypass pipe 6 can be returned to the collective pipe 4. The return pipe 7 includes a first return pipe 7A for collecting a sterilizing liquid from one of the first collective pipe 4A and the second collective pipe 4B (the second collective pipe 4B in the present embodiment), and a first collective pipe. A second return pipe 7B for supplying a sterilizing liquid to a pipe (in the present embodiment, the second collective pipe 4B) to which the first return pipe 7A is connected among the 4A and the second collective pipe 4B.

  One end of the first return pipe 7A is connected to the first switch 8A of the switch 8. The other end of the first return pipe 7A is connected to a valve 9A attached to the second collective pipe 4B. The first return pipe 7A can communicate with the second collective pipe 4B via the valve 9A so that the sterilizing liquid can be collected from the second collective pipe 4B. A valve 71A for opening and closing the flow path of the first return pipe 7A is attached to the first return pipe 7A. The valve 71A is preferably mounted near the first switch 8A.

  One end of the second return pipe 7B is connected to the second switch 8B of the switch 8. The other end of the second return pipe 7B is connected to a valve 9B attached to the second collective pipe 4B. The second return pipe 7B can communicate with the second collective pipe 4B via a valve 9B so that a sterilizing solution can be supplied to the second collective pipe 4B. A valve 71B for opening and closing the flow path of the second return pipe 7B is attached to the second return pipe 7B. The valve 71B is preferably mounted near the second switch 8B.

  The switch 8 is connected to the beer system pipe 2A, the RTD system pipe 2B, the collective pipe 4, the bypass pipe 6, and the return pipe 7, and is connected to the beer system pipe 2A, the RTD system pipe 2B, the collective pipe 4, the bypass pipe 6, and the return. This is a switching device that switches a combination for communicating the pipe 7.

  FIG. 2 is a schematic front view showing a part of the switch. FIG. 3 is a schematic side view showing a part of the switch. FIG. 4 is a diagram for explaining the arrangement of the communication pipe. In FIG. 1, the shape of the switch 8 is shown in a modified form in order to make the entire flow easier to understand.

  As shown in FIGS. 2 to 4, the switch 8 is configured by a multi-swing bend (swing bend) that connects a plurality of connected pipes and switches a combination that connects the plurality of pipes. The switch 8 includes a base 81, a communication pipe 82, and a proximity sensor 83.

  Beer system piping 2A, RTD system piping 2B, collective piping 4, bypass piping 6, and return piping 7 are fixed to base 81. The base portion 81 has a beer system piping hole 81a communicating with the beer system piping 2A, an RTD system piping hole 81b communicating with the RTD system piping 2B, and a collective piping communicating with the collective piping 4. A hole 81c for a bypass pipe connected to the bypass pipe 6 and a hole 81e for a return pipe connected to the return pipe 7 are formed.

  The beer system piping hole 81a, the RTD system piping hole 81b, the collective piping hole 81c, the bypass piping hole 81d, and the return piping hole 81e are circular through holes having the same radius as each other. The distance between the beer system piping hole 81a and the collective piping hole 81c, the distance between the beer system piping hole 81a and the bypass piping hole 81d, and the distance between the RTD system piping hole 81b and the collective piping hole 81c. The separation distance, the separation distance between the RTD system piping hole 81b and the bypass piping hole 81d, and the separation distance between the bypass piping hole 81d and the return piping hole 81e are the same.

  The communication pipe 82 is attached to any one of a plurality of holes formed in the base 81 to communicate the pair of holes. Specifically, the communication pipe 82 is attached to the beer system piping hole 81a and the collective piping hole 81c, so that the beer system piping hole 81a and the collective piping hole 81c can communicate with each other. ing. The communication pipe 82 is attached to the beer system piping hole 81a and the bypass piping hole 81d, so that the beer system piping hole 81a and the bypass piping hole 81d can communicate with each other. The communication pipe 82 is attached to the RTD system piping hole 81b and the collective piping hole 81c, so that the RTD system piping hole 81b and the collective piping hole 81c can communicate with each other. The communication pipe 82 is attached to the RTD system piping hole 81b and the bypass piping hole 81d, so that the RTD system piping hole 81b and the bypass piping hole 81d can communicate with each other. The communication pipe 82 is attached to the bypass pipe hole 81d and the return pipe hole 81e, so that the bypass pipe hole 81d and the return pipe hole 81e can communicate with each other. In FIG. 2, one communicating pipe 82 is attached to the beer system piping hole 81a and the bypass piping hole 81d, and the other communicating pipe 82 is connected to the RTD system piping hole 81b and the collective piping hole 81c. 1 shows a state in which it is attached to the camera. FIG. 3 shows a state in which the communication pipe 82 is attached to the beer system piping hole 81a and the bypass piping hole 81d.

  The communication pipe 82 is a pipe curved in a U-shape. The communication pipe 82 is attached to the pair of holes so as to straddle a pair of holes among the holes formed in the base portion 81. The communication pipe 82 is provided with a detection rod 82a extending toward a central portion between the pair of holes when the communication pipe 82 is mounted on the pair of holes.

  The proximity sensor 83 is disposed near the detection rod portion 82a of the communication pipe 82 when the communication pipe 82 is attached to any one of a plurality of holes formed in the base 81. Detects the communication pipe 82. As the proximity sensor 83, various known sensors can be used. Specifically, the proximity sensor 83 includes a central portion between the beer system piping hole 81a and the collective piping hole 81c, a central portion between the beer system piping hole 81a and the bypass piping hole 81d, and an RTD system. The central portion between the piping hole 81b and the collective piping hole 81c, the central portion between the RTD system piping hole 81b and the bypass piping hole 81d, and the bypass piping hole 81d and the return piping hole 81e. It is attached to each of the central parts in between.

  When each of the proximity sensors 83 detects that the detection rod 82a of the communication pipe 82 has approached, it outputs this detection signal to a control unit (not shown). Thereby, the control unit can confirm which of the pair of holes the communication pipe 82 is attached to.

  The switch 8 configured in this way has a first switch 8A and a second switch 8B. The first switch 8A and the second switch 8B have the same configuration.

  The first switch 8A connects the beer system pipe 2A, the RTD system pipe 2B, the first collecting pipe 4A, the first bypass pipe 6A, and the first return pipe 7A to each other. In the first switch 8A, the beer system pipe 2A and the first collective pipe 4A, the beer system pipe 2A and the first bypass pipe 6A, the RTD system pipe 2B and the first collective pipe 4A, the RTD system pipe are connected by the communication pipe 82. 2B and the first bypass pipe 6A, and the first bypass pipe 6A and the first return pipe 7A can communicate with each other.

  The second switch 8B connects the beer system pipe 2A, the RTD system pipe 2B, the second collecting pipe 4B, the second bypass pipe 6B, and the second return pipe 7B to each other. In the second switch 8B, the communication pipe 82 allows the beer system pipe 2A and the second collective pipe 4B, the beer system pipe 2A and the second bypass pipe 6B, the RTD system pipe 2B and the second collective pipe 4B, the RTD system pipe. 2B and the second bypass pipe 6B, and the second bypass pipe 6B and the second return pipe 7B can communicate with each other.

  Next, a sterilization method using the liquid filling device 1 will be described.

  In the present embodiment, as a sterilization method, a first sterilization step of sterilizing the system pipe 2 while filling the product container with the liquid by the filler 3 and a second sterilization step of sterilizing both the system pipe 2 and the collective pipe 4. ,It can be performed.

  FIG. 5 is a piping flow diagram showing a state in which the beer system piping is sterilized in the first sterilization step. As shown in FIG. 5, when sterilizing the beer system piping 2A in the first sterilization process, first, in the first switch 8A and the second switch 8B, one communication pipe 82 is connected to the beer system piping hole 81a. Attach it to the bypass piping hole 81d, and attach another communication pipe 82 to the RTD system piping hole 81b and the collective piping hole 81c (see FIG. 2). Thus, in the first switch 8A, the beer system pipe 2A and the first bypass pipe 6A communicate with each other, and the RTD system pipe 2B and the first collective pipe 4A communicate with each other. In the second switch 8B, the beer system pipe 2A and the second bypass pipe 6B communicate with each other, and the RTD system pipe 2B and the second collective pipe 4B communicate with each other.

  Next, the flow paths of the first bypass pipe 6A and the second bypass pipe 6B are opened by the valves 61A and 61B, and the flow paths of the first return pipe 7A and the second return pipe 7B are closed by the valves 71A and 71B. The flow paths on the first return pipe 7A side and the second return pipe 7B side are closed by 9A and the valve 9B, the flow path on the beer tank 21A side is closed by the valve 22A, and the flow path on the RTD tank 21B side is opened by the valve 22B.

  Next, after confirming that the communication pipe 82 is correctly attached by the output from the proximity sensor 83 of the first switch 8A and the second switch 8B, the RTD system piping 2B is connected from the RTD tank 21B via the valve 22B. Is supplied by the pump 23B. Then, the RTD flows in the order of the RTD system pipe 2B, the first switch 8A, and the first collecting pipe 4A, and is supplied to the filler 3. The RTD supplied to the filler 3 is filled in a product container. The remaining RTD not filled in the product container flows in the order of the filler 3, the second collective pipe 4B, and the second switch 8B, and is collected in the RTD system pipe 2B.

  Further, while the product container is being filled with the RTD, the output from the proximity sensor 83 of the first switch 8A and the second switch 8B confirms that the communication pipe 82 is correctly attached, and then the sterilizing solution is used. A sterilizing solution is supplied from the supply device 5 to the second bypass pipe 6B. Then, the sterilizing solution flows through the sterilizing solution supply device 5, the second bypass pipe 6B, and the second switch 8B in this order, and is supplied to the beer system pipe 2A. The sterilizing solution supplied to the beer system pipe 2A flows through the beer system pipe 2A, the first switch 8A, and the first bypass pipe 6A in this order, and is collected by the sterilizing solution supply device 5. In other words, in this step, the sterilizing solution sterilizes while circulating through the beer system piping 2A, bypassing the filler 3, the first collecting pipe 4A, and the second collecting pipe 4B through which the RTD flows.

  FIG. 6 is a piping flowchart showing a state in which the RTD piping is sterilized in the first sterilization step. As shown in FIG. 6, when sterilizing the RTD system pipe 2B in the first sterilization step, first, in the first switch 8A and the second switch 8B, one communication pipe 82 is connected to the RTD system pipe hole 81b. Attach it to the bypass pipe hole 81d, and attach another communication pipe 82 to the beer system piping hole 81a and the collective piping hole 81c. Thereby, in the first switch 8A, the RTD system pipe 2B and the first bypass pipe 6A communicate with each other, and the beer system pipe 2A and the first collective pipe 4A communicate with each other. In the second switch 8B, the RTD system pipe 2B and the second bypass pipe 6B communicate with each other, and the beer system pipe 2A and the second collective pipe 4B communicate with each other.

  Next, the flow paths of the first bypass pipe 6A and the second bypass pipe 6B are opened by the valves 61A and 61B, and the flow paths of the first return pipe 7A and the second return pipe 7B are closed by the valves 71A and 71B. The flow paths on the first return pipe 7A side and the second return pipe 7B side are closed by 9A and the valve 9B, the flow path on the beer tank 21A side is opened by the valve 22A, and the flow path on the RTD tank 21B side is closed by the valve 22B.

  Next, after confirming that the communication pipe 82 is correctly attached by the output from the proximity sensor 83 of the first switch 8A and the second switch 8B, the beer system pipe 2A is transmitted from the beer tank 21A via the valve 22A. Is sent out by the pump 23A. Then, the beer flows in the order of the beer system pipe 2A, the first switch 8A, and the first collecting pipe 4A, and is supplied to the filler 3. The beer supplied to the filler 3 is filled in a product container. The remaining beer not filled in the product container flows in the order of the filler 3, the second collecting pipe 4B and the second switch 8B, and is collected in the beer system pipe 2A.

  In addition, while filling the product container with beer, the output from the proximity sensor 83 of the first switch 8A and the second switch 8B confirms that the communication pipe 82 is correctly attached, and then the sterilizing liquid A sterilizing solution is supplied from the supply device 5 to the second bypass pipe 6B. Then, the sterilizing solution flows in the order of the sterilizing solution supply device 5, the second bypass pipe 6B, and the second switch 8B, and is supplied to the RTD system pipe 2B. The sterilizing solution supplied to the RTD system pipe 2B flows in the order of the RTD system pipe 2B, the first switch 8A, and the first bypass pipe 6A, and is collected by the sterilizing solution supply device 5. In other words, in this step, the sterilizing solution sterilizes while circulating through the RTD system piping 2B, bypassing the filler 3, the first collecting pipe 4A, and the second collecting pipe 4B through which the beer flows.

  FIG. 7 is a piping flow diagram showing a state in which both the beer system piping and the collective piping are sterilized in the second sterilization step. As shown in FIG. 7, when sterilizing both the beer system pipe 2A and the collecting pipe 4 in the second sterilization step, first, one communication pipe 82 is bypassed in the first switch 8A and the second switch 8B. Attach it to the piping hole 81d and the return piping hole 81e, and attach another communication pipe 82 to the beer system piping hole 81a and the collective piping hole 81c. Thus, in the first switch 8A, the first bypass pipe 6A and the first return pipe 7A are connected, and the beer system pipe 2A and the first collecting pipe 4A are connected. In the second switch 8B, the second bypass pipe 6B and the second return pipe 7B communicate with each other, and the beer system pipe 2A and the second collective pipe 4B communicate with each other.

  Next, the flow paths of the first bypass pipe 6A and the second bypass pipe 6B are opened by the valves 61A and 61B, and the flow paths of the first return pipe 7A and the second return pipe 7B are opened by the valves 71A and 71B. The flow paths on the first return pipe 7A side and the second return pipe 7B side are opened by 9A and the valve 9B, and the flow paths on the beer tank 21A side and the RTD tank 21B side are closed by the valves 22A and 22B.

  Next, after confirming that the communication pipe 82 is correctly attached by the output from the proximity sensor 83 of the first switch 8A and the second switch 8B, the sterilizing solution is supplied from the sterilizing solution supply device 5 to the second bypass pipe. 6B. Then, the sterilizing solution flows in the order of the sterilizing solution supply device 5, the second bypass pipe 6B, the second switch 8B, the second return pipe 7B, and the valve 9B, and is supplied to the second collective pipe 4B. The sterilizing solution supplied to the second collecting pipe 4B flows in the order of the second collecting pipe 4B, the second switch 8B, the beer system pipe 2A, the first switch 8A, the first collecting pipe 4A, and the filler 3, and It returns to the double piping 4B. The sterilizing solution returned to the second collecting pipe 4B flows in the order of the second collecting pipe 4B, the valve 9A, the first return pipe 7A, the first switch 8A, and the first bypass pipe 6A, and is sent to the sterilizing liquid supply device 5. Collected. That is, in this step, the sterilizing solution removes the second collecting pipe 4B, the beer system pipe 2A, the first collecting pipe 4A, and the filler 3 without bypassing the filler 3, the first collecting pipe 4A, and the second collecting pipe 4B. Sterilize while circulating.

  FIG. 8 is a piping flow diagram showing a state in which both the RTD system piping and the collective piping are sterilized in the second sterilization step. As shown in FIG. 8, when sterilizing both the RTD system pipe 2B and the collective pipe 4 in the second sterilization step, first, one communication pipe 82 is bypassed in the first switch 8A and the second switch 8B. Attach it to the piping hole 81d and the return piping hole 81e, and attach another communication pipe 82 to the RTD system piping hole 81b and the collective piping hole 81c. As a result, in the first switch 8A, the first bypass pipe 6A and the first return pipe 7A communicate with each other, and the RTD system pipe 2B and the first collective pipe 4A communicate with each other. In the second switch 8B, the second bypass pipe 6B and the second return pipe 7B communicate with each other, and the RTD system pipe 2B and the second collective pipe 4B communicate with each other.

  Next, the flow paths of the first bypass pipe 6A and the second bypass pipe 6B are opened by the valves 61A and 61B, and the flow paths of the first return pipe 7A and the second return pipe 7B are opened by the valves 71A and 71B. The flow paths on the first return pipe 7A side and the second return pipe 7B side are opened by 9A and the valve 9B, and the flow paths on the beer tank 21A side and the RTD tank 21B side are closed by the valves 22A and 22B.

  Next, after confirming that the communication pipe 82 is correctly attached by the output from the proximity sensor 83 of the first switch 8A and the second switch 8B, the sterilizing solution is supplied from the sterilizing solution supply device 5 to the second bypass pipe. 6B. Then, the sterilizing solution flows in the order of the sterilizing solution supply device 5, the second bypass pipe 6B, the second switch 8B, the second return pipe 7B, and the valve 9B, and is supplied to the second collective pipe 4B. The sterilizing solution supplied to the second collecting pipe 4B flows in the order of the second collecting pipe 4B, the second switch 8B, the RTD system pipe 2B, the first switch 8A, the first collecting pipe 4A, and the filler 3, and It returns to the double piping 4B. The sterilizing solution returned to the second collecting pipe 4B flows in the order of the second collecting pipe 4B, the valve 9A, the first return pipe 7A, the first switch 8A, and the first bypass pipe 6A, and is sent to the sterilizing liquid supply device 5. Collected. That is, in this step, the sterilizing liquid removes the second collecting pipe 4B, the RTD system pipe 2B, the first collecting pipe 4A, and the filler 3 without bypassing the filler 3, the first collecting pipe 4A, and the second collecting pipe 4B. Sterilize while circulating.

  Here, a liquid filling apparatus of a comparative example will be described with reference to FIGS.

  FIG. 9 is a piping flow diagram illustrating a liquid filling device of a comparative example. As shown in FIG. 9, the liquid filling device 101 of the comparative example is basically the same as the liquid filling device 1 of the present embodiment, but does not include the bypass pipe 6 and the return pipe 7, and has the The two collecting pipes 4B are directly connected by the sterilizing liquid pipe 106. Therefore, hereinafter, only the points different from the liquid filling device 1 of the present embodiment will be described.

  The liquid filling apparatus 101 includes a plurality of system pipes 2, a filler 3, a collective pipe 4, a sterilizing liquid supply device 5, a sterilizing liquid pipe 106, and a switch 108.

  The sterilizing solution pipe 106 has a first sterilizing solution pipe 106A for collecting the sterilizing solution in the sterilizing solution supply device 5, and a second sterilizing solution tube 106B to which the sterilizing solution is supplied from the sterilizing solution supply device 5. The mounting position of the first sterilizing liquid pipe 106A in the second collecting pipe 4B is downstream of the mounting position of the second sterilizing liquid pipe 106B in the second collecting pipe 4B in the liquid circulation direction.

  The switch 108 is connected to the beer system pipe 2A, the RTD system pipe 2B, and the collective pipe 4, and switches the combination that connects the beer system pipe 2A, the RTD system pipe 2B, and the collective pipe 4. Note that the configuration of the switch 108 is basically the same as the configuration of the switch 8 of the present embodiment.

  The switch 108 is connected to the first switch 8A connected to the beer system pipe 2A, the RTD system pipe 2B, and the first collective pipe 4A, and connected to the beer system pipe 2A, the RTD system pipe 2B, and the second collective pipe 4B. A second switch 8B. The first switch 8A and the second switch 8B have the same configuration.

  As described above, in the liquid filling apparatus 101, since the sterilizing solution supply device 5 and the second collecting pipe 4B are directly connected by the sterilizing liquid pipe 106, the sterilizing liquid includes the filler 3, the first collecting pipe 4A, The second collecting pipe 4B cannot be bypassed. For this reason, in the liquid filling apparatus 101, as shown in FIG. 10, the second sterilization process for sterilizing both the beer system pipe 2A and the collecting pipe 4, and as shown in FIG. Only one of the second disinfection steps for disinfecting both of the collecting pipes 4 can be performed.

この各工程のうち、ビール充填前殺菌工程、ビール充填終了後殺菌工程、ＲＴＤ充填開始前殺菌工程及びＲＴＤ充填終了後殺菌工程が殺菌工程になる。その中で、ビール充填前殺菌工程及びＲＴＤ充填開始前殺菌工程は、系統配管２及び集合配管４の双方を殺菌する必要があるが、ビール充填終了後殺菌工程及びＲＴＤ充填終了後殺菌工程は、今まで使用していたビール系統配管の環境をリセットすることが目的であるため、必ずしも集合配管４の殺菌までは必要ない。なお、ＲＴＤ充填終了後殺菌工程は、その後に一旦作業を中断する場合は、系統配管２及び集合配管４の双方を殺菌する必要があるが、続いて別の種類の飲料を製品容器に充填する場合は、必ずしも集合配管４の殺菌までは必要ない。 By the way, when filling a product container with beer and then changing the liquid to be filled into the product container from beer to RTD, as shown in Table 1, for example, a pre-beer filling sterilization step, a beer filling step, and a beer filling end The post-sterilization step, the pre-RTD filling pre-sterilization step, the RTD filling step, and the RTD filling post-sterilization step are performed in this order.

Among these steps, the sterilization step before beer filling, the sterilization step after completion of beer filling, the sterilization step before RTD filling start, and the sterilization step after completion of RTD filling are sterilization steps. Among them, the beer filling sterilization step and the RTD filling start sterilization step need to sterilize both the system pipe 2 and the collective pipe 4. Since the purpose is to reset the environment of the beer system piping used so far, it is not always necessary to sterilize the collective piping 4. In the sterilization step after the completion of the filling of the RTD, if the operation is temporarily interrupted thereafter, it is necessary to sterilize both the system piping 2 and the collective piping 4, but then another type of beverage is filled into the product container. In this case, it is not always necessary to sterilize the collecting pipe 4.

  However, in the liquid filling apparatus 101 of the comparative example, the sterilizing liquid always passes through the filler 3, the first collecting pipe 4A, and the second collecting pipe 4B. There is a need to do.

このように、本実施形態では、殺菌液供給装置５に接続されたバイパス配管６が切替器８に接続されているため、殺菌液は、フィラー３及び集合配管４をバイパスして、ビール系統配管２Ａ又はＲＴＤ系統配管２Ｂを循環することができる。このため、フィラー３から製品容器にＲＴＤを充填しているときに、ビール系統配管２Ａに殺菌液を循環させてビール系統配管２Ａを殺菌することができる。また、フィラー３から製品容器にビールを充填しているときに、ＲＴＤ系統配管２Ｂに殺菌液を循環させてＲＴＤ系統配管２Ｂを殺菌することができる。これにより、系統配管２を殺菌するための時間を削減することができる。 On the other hand, in the first sterilization process of the liquid filling apparatus 1 of the present embodiment, the filler 3, the first collecting pipe 4A and the second collecting pipe 4B are bypassed, and the sterilizing liquid is supplied to the beer pipe 2A or the RTD pipe. 2B. For this reason, as shown in Table 2, since the sterilization step after the completion of beer filling can be performed during the RTD filling step, the time required for the sterilization step after the completion of beer filling can be shortened.

As described above, in the present embodiment, since the bypass pipe 6 connected to the sterilizing liquid supply device 5 is connected to the switch 8, the sterilizing liquid bypasses the filler 3 and the collective pipe 4 and is connected to the beer system pipe. 2A or RTD system piping 2B can be circulated. Therefore, when the RTD is filled from the filler 3 into the product container, the beer system piping 2A can be sterilized by circulating the sterilizing solution through the beer system piping 2A. Further, when beer is being filled from the filler 3 into the product container, the RTD system piping 2B can be sterilized by circulating a sterilizing solution through the RTD system piping 2B. Thereby, the time for sterilizing the system piping 2 can be reduced.

  In this case, one of the beer system pipe 2A and the RTD system pipe 2B is connected to the collective pipe 4 and the bypass pipe 6, respectively. Therefore, mixing of different liquids can be prevented.

  In addition, in the liquid filling apparatus 1, since the return pipe 7 is connected to the collecting pipe 4 and the switch 8, the sterilizing solution can be circulated not only in the system pipe 2 but also in the collecting pipe 4. Thereby, both the system piping 2 and the collective piping 4 can be sterilized.

  In this case, one of the beer system pipe 2A and the RTD system pipe 2B communicates with the collective pipe 4, and one of the system pipe 2 and the return pipe 7 communicates with the bypass pipe 6. Therefore, mixing of different liquids can be prevented.

  In the liquid filling apparatus 1, the collecting pipe 4 has a first collecting pipe 4A and a second collecting pipe 4B, the bypass pipe 6 has a first bypass pipe 6A and a second bypass pipe 6B, and the switch 8 is By having the first switch 8A and the second switch 8B, in the first sterilization step, beer or RTD and the sterilizing liquid can be appropriately circulated. Furthermore, since the return pipe 7 has the first return pipe 7A and the second return pipe 7B, the sterilizing solution can be appropriately circulated in the second sterilization step.

  Further, in the liquid filling apparatus 1, the attachment position of the communication pipe 82 can be confirmed from the output of the proximity sensor 83. Thus, it is possible to prevent mixing of different liquids caused by incorrectly attaching the communication pipe 82.

  Further, in the liquid filling apparatus 1, since the switch 8 is a swing bend, the communication path can be easily switched while suppressing the communication pipe 82 from being attached by mistake.

  Further, in the liquid filling apparatus 1, the beer tank 21A is attached to the beer system piping 2A, and the RTD tank 21B is attached to the RTD system piping 2B, so that mixing of different liquids can be prevented. The provision of common instruments such as the measuring instrument AP, the dissolved oxygen concentration measuring instrument DO, and the thermometer TP makes it possible to reduce the number of common instruments.

  The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments.

  For example, in the embodiment described above, the return pipe is provided for performing the second sterilization step. However, when the second sterilization step is unnecessary, the return pipe may not be provided.

  In the above embodiment, the specific configuration of the switch has been described. However, various other devices may be used as the switch.

DESCRIPTION OF SYMBOLS 1 ... Liquid filling apparatus, 2 ... System piping, 2A ... Beer system piping, 2B ... RTD system piping, 3 ... Filler, 4 ... Collective piping, 4A ... First collective piping, 4B ... Second collective piping, 5 ... Sterilizing liquid Supply device, 6: bypass pipe, 6A: first bypass pipe, 6B: second bypass pipe, 7: return pipe, 7A: first return pipe, 7B: second return pipe, 8: switch, 8A: first Switch, 8B: second switch, 9A: valve, 9B: valve, 21A: beer tank (liquid tank), 21B: RTD tank (liquid tank), 22A: valve, 22B: valve, 23A: pump, 23B ... Pump, 61A ... valve, 61B ... valve, 71A ... valve, 71B ... valve, 81 ... base part, 81a ... beer system piping hole, 81b ... RTD system piping hole, 81c ... collective piping hole, 8 d: bypass pipe hole, 81e: return pipe hole, 82: communication pipe, 82a: detection rod, 83: proximity sensor, 101: liquid filling device, 106: sterilizing liquid pipe, 106A: first sterilizing liquid pipe , 106B: second sterilizing liquid pipe, 108: switch, AP: main measuring instrument, DO: dissolved oxygen concentration measuring instrument, TP: thermometer.

Claims (11)

A plurality of system piping for circulating different types of liquids,
A filler that fills the product container with any one of the liquids,
A collecting pipe connected to the filler and circulating any one of the liquids,
A sterilizing solution supply device for supplying a sterilizing solution,
A bypass pipe connected to the sterilizing solution supply device and circulating the sterilizing solution,
A switch that is connected to the plurality of system pipes, the collective pipe and the bypass pipe, and that switches a combination that communicates the plurality of system pipes, the collective pipe and the bypass pipe,
Liquid filling device. The switch is capable of communicating any one of the plurality of system pipes and the collective pipe, and any one of the plurality of system pipes and the bypass pipe. It is possible to communicate
The liquid filling device according to claim 1. A return pipe connected to the collecting pipe and the switching device, for sending the sterilizing liquid from the collecting pipe to the bypass pipe, and returning the collecting pipe from the bypass pipe to the collecting pipe to circulate the sterilizing liquid,
The switch is connected to the collective pipe, the plurality of system pipes, the bypass pipe, and the return pipe, and switches a combination that connects the collective pipe, the plurality of system pipes, the bypass pipe, and the return pipe. ,
The liquid filling device according to claim 1. The switch is capable of communicating any one of the plurality of system pipes and the collective pipe, and any one of the plurality of system pipes or the return pipe. It is possible to communicate with the bypass pipe,
The liquid filling device according to claim 3. The collective piping is
A first collecting pipe connected to the upstream side of the filler in the circulation direction of the liquid and supplying the liquid to the filler,
A second collecting pipe connected to the downstream side of the filler in the circulation direction of the liquid and recovering the liquid from the filler,
The bypass pipe,
A first bypass pipe connected to an upstream side of the sterilizing solution supply device in the circulation direction of the sterilizing solution and collecting the sterilizing solution in the sterilizing solution supply device;
A second bypass pipe connected to the downstream side of the sterilizing solution supply device in the circulation direction of the sterilizing solution and supplied with the sterilizing solution from the sterilizing solution supply device,
The switch,
A first switch connecting the first collective pipe, any one of the plurality of system pipes and the first bypass pipe to each other,
The second collecting pipe, and a second switch that connects the one of the plurality of system pipes and the second bypass pipe to each other,
The liquid filling device according to claim 1. The collective piping is
A first collecting pipe connected to the upstream side of the filler in the circulation direction of the liquid and supplying the liquid to the filler,
A second collecting pipe connected to the downstream side of the filler in the circulation direction of the liquid and recovering the liquid from the filler,
The bypass pipe,
A first bypass pipe connected to an upstream side of the sterilizing solution supply device in the circulation direction of the sterilizing solution and collecting the sterilizing solution in the sterilizing solution supply device;
A second bypass pipe connected to the downstream side of the sterilizing solution supply device in the circulation direction of the sterilizing solution and supplied with the sterilizing solution from the sterilizing solution supply device,
The return pipe is
A first return pipe connected to any one of the first collecting pipe and the second collecting pipe and collecting the sterilizing liquid from the pipe,
A second return pipe connected to a pipe to which the first return pipe is connected among the first collective pipe and the second collective pipe to supply the sterilizing liquid to the pipe,
The switch,
The first collective pipe, and any one of the plurality of system pipes and the first bypass pipe are connected to each other, and a first switch that connects the first bypass pipe and the first return pipe,
A second switch that connects the second collective pipe, any one of the plurality of system pipes and the second bypass pipe to each other, and connects the second bypass pipe and the second return pipe; ,
The liquid filling device according to claim 3. The switch,
A base portion formed with a plurality of holes that are respectively connected to the plurality of pipes connected to the switch,
A communication pipe that communicates the first hole and the second hole by being attached to any one pair of the first hole and the second hole among the plurality of holes,
When the communication pipe is attached to the first hole and the second hole, a proximity sensor that detects the communication pipe by being disposed near the communication pipe,
The liquid filling device according to claim 1. The switch is a swing bend;
The liquid filling device according to claim 1. A liquid tank for storing the liquid to be circulated is attached to the system piping,
A common measuring instrument for measuring a measurement item common to a plurality of types of liquids is attached to the collecting pipe.
The liquid filling device according to claim 1. A plurality of system pipes for circulating different kinds of liquids, a filler for filling any one of the liquids into the product container, a collecting pipe connected to the filler to circulate any one of the liquids, and a sterilizing liquid And a bypass pipe connected to the sterilizing liquid supply apparatus for circulating the sterilizing liquid; and the plurality of system pipes, the collective pipe and the bypass pipe connected to the bypass pipe, and the plurality of systems. A switching device that switches a combination that connects the piping, the collective piping, and the bypass piping, and a sterilization method for a liquid filling device, comprising:
The sterilization method comprises a first sterilization step of sterilizing the system piping while filling the product container with the liquid with the filler,
In the first sterilization step,
By the switch, any one of the plurality of system pipes communicates with the collective pipe, and among the plurality of system pipes, a pipe that does not communicate with the collective pipe and the bypass pipe communicate with each other. ,
Sterilization method for liquid filling equipment. The liquid filling apparatus further includes a return pipe connected to the collective pipe and the switch, and returning the sterilizing solution that has bypassed the collective pipe by the bypass pipe to the collective pipe and circulating the sterilizing liquid. ,
The switch is a combination that connects the collective pipe, the plurality of system pipes, the bypass pipe and the return pipe to each other, and connects the collective pipe, the plurality of system pipes, the bypass pipe, and the return pipe. switching,
The sterilization method includes a second sterilization step of sterilizing the system piping and the collective piping,
In the second sterilization step,
By the switch, communicates any one of the plurality of system pipes and the collective pipe, and communicates the return pipe and the bypass pipe,
The sterilization method according to claim 10.

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