JP4137114B2 - Mineral water dispenser heat sterilizer - Google Patents

Description

The present invention relates to a heat sterilization apparatus for a dispenser for supplying mineral water , and further enables heat sterilization in a storage tank and a piping system in the dispenser and further suppresses invasion of germs into the dispenser. It is intended to improve safety in hygiene management, maintain the original functionality of mineral water supplied from the dispenser, improve operability such as mounting of a mineral water container, and make the dispenser compact.

Various types of dispensers that supply mineral water , that is, water servers, are commercially available. As users' interest in mineral water increases, the safety of mineral water and the sensory aspects of mineral water are improved. The pursuit of quality has come to be highly demanded. To ensure the safety of mineral water, in the case of a dispenser that supplies tap water, the tap water itself has some degree of bactericidal properties due to the chlorine added to the tap water for sterilization. Is suppressed and does not matter much. However, in the case of mineral water , chlorine for sterilization is not added, and the growth of microorganisms in mineral water is an important problem.

Microbial growth in mineral water, to the microorganism is harmful to the human body as long as it has a pathogenic, even without pathogenicity, or by adding a bad taste odor mineral water, or mineral water is turbid Sometimes. If the dispenser always supplies mineral water continuously, the growth of microorganisms in the dispenser is unlikely to occur. However, in the case of use in an office, the dispenser is used for a long time so that it is not used at night or on weekends. If there is a state in which mineral water stagnate, microorganisms may grow. Moreover, the microflora of microorganisms may be produced | generated gradually in the dispenser used for a long time.

  Conventionally, in order to suppress the growth of microorganisms in the dispenser, a disinfectant or high-temperature hot water is injected into the piping system in the dispenser from the outside of the dispenser to circulate and sterilize, or a sterilization filtration device in the dispenser There were many things to establish. However, injecting a bactericidal agent or hot water into the piping system in the dispenser requires an instrument or device for flowing the bactericidal agent into the dispenser and draining it after circulation, and for injecting and discharging the bactericidal agent, etc. However, it requires a lot of space, is complicated, and requires time and effort. Furthermore, when using a disinfectant etc., the washing | cleaning after use of a disinfectant was required. In the case of a sterilizing filtration device, there is a problem that maintenance of the filter of the filtration device and the like is complicated, and microorganisms captured in the filtration device may proliferate and generate a flora.

Therefore, the present inventors have a dispenser that provides drinking water from a container previously filled with drinking water, a device for cooling the container filled with drinking water, and a tank for storing drinking water in the piping system. The above-mentioned piping system and storage tank are equipped with a device for heating and sterilizing with a heater or a device for allowing hot water to pass therethrough, and these devices for heating and sterilization are controlled via an automatically performed device. It is possible to sterilize the germs that grow in the dispenser by providing such a device for sterilizing the inside, provide a simple and efficient sterilization method, and sanitary drinking water always in the state of cold water or hot water Provided a dispenser of drinking water that can be supplied by the company (see Patent Document 1).
JP-A-6-48488

  However, in the drinking water dispenser described in Patent Document 1, the apparatus for heat sterilization is configured by attaching heaters to a part of the piping system, and to the cold water tank and the hot water tank, respectively. The amount of electric power to be used is also large, and therefore the equipment manufacturing cost and running cost are increased.

  Moreover, although the heat sterilization method in the dispenser disclosed in the invention described in the above publication is sufficiently effective as a method for sterilizing various germs, there is a part that cannot be heated due to the detailed structure of the dispenser. May be insufficient. For example, in the invention described in the above-mentioned publication, an I-type joint is used to connect from a connection site with a drinking water container to a piping system. This is a structure that is usually used to simplify the handling of the hose and to simplify the structure in the dispenser. However, since hot water does not pass through this I-type joint, it can be sterilized. There wasn't.

  In general, in the case of microscopic invasion of microbes or invasion of non-pathogenic microbes, the safety of drinking water may be ensured by heat sterilization of microbes that have entered the dispenser. In the case of the invasion of the water or pathogenic microorganisms, the intrusion into the dispenser may impair the safety of the drinking water or reduce the sensory quality of the drinking water. In order to maintain the safety and sensory quality of drinking water, the dispenser should be equipped with sterilization means, prevent microbes from entering the original dispenser as much as possible, and avoid frequent heat sterilization. This is necessary to omit the maintenance of the dispenser or prevent deterioration of each part of the dispenser.

  Furthermore, when used as a dispenser for supplying drinking water, especially when used as a dispenser for supplying drinking water that has a very delicate flavor, such as mineral water, and is susceptible to sensuality, within the dispenser In particular, even a slight adhesion of off-flavor to the drinking water from the portion in contact with the drinking water is a problem.

  Furthermore, it is important that the dispenser has good operability and is easy to handle, and the appearance as a compact device requiring little installation space is required.

According to invention of Claim 1, it is a dispenser which uses for drinking mineral water from a drinking water container via a piping system, Comprising: The cold water tank which has a cooling device in a piping system, and the hot water tank which has a heating device in heat sterilization apparatus of the dispenser of mineral water with the heat sterilization apparatus, includes a communicating pipe that connects the hot water tank and the cold water tank, and a circulation pump and a solenoid valve provided in the communicating pipe, wherein The communication pipe includes a metal pipe and a hose connecting the metal pipe , the metal pipe is formed of stainless steel, and the casing and impeller of the circulation pump and the body of the solenoid valve are Formed of a selected material of polyacetal, glass fiber reinforced PP or polysulfone, Bed is formed of silicone rubber or a material selected fluororubber, and inner surface heat sterilization apparatus bottled water dispenser, characterized in that it is coated with LLDPE is provided.

According to the present invention, when the circulation solenoid valve is opened and the circulation pump is operated, the hot water stored in the hot water tank circulates through the communication pipe, and the inside of the storage tank and the communication pipe is heated and sterilized. In particular, since the communication pipe is constituted by a combination of a metal pipe and a hose connecting the metal pipe, the shape of the communication pipe can be easily adjusted. In addition, the hose occupies a smaller proportion compared to the case where the entire communication pipe is formed with a hose to prevent the odor of the hose from adhering to the mineral water, and the hose has a low gas barrier property. Prevents the odor of the atmosphere from adhering to mineral water. Furthermore, since the casing and impeller of the circulation pump, the body of the solenoid valve, and the valve of the solenoid valve are selected and used with a material that does not affect the mineral water sensuously, the use is continued for a long time. However, it does not give off a nasty smell without damaging the original subtle flavor of mineral water, which is very sensitive to sensuality.

According to invention of Claim 2, it is a dispenser which uses for drinking mineral water from a drinking water container via a piping system, Comprising: The cold water tank which has a cooling device in a piping system, and the hot water tank which has a heating device In the heat sterilization apparatus for a dispenser of mineral water, the heat sterilization apparatus includes a communication pipe connecting the cold water tank and the hot water tank, a circulation pump and an electromagnetic valve provided in the communication pipe, and the electromagnetic valve And a timer for periodically operating the circulation pump, the communication pipe includes a metal pipe and a hose connecting the metal pipe, and the metal pipe is formed of stainless steel, The casing and impeller of the circulation pump and the body of the solenoid valve are made of polyacetal, glass fiber reinforced PP or poly The solenoid valve is made of a selected material of silicon rubber or fluoro rubber, the pipe is made of stainless steel, and the hose connecting the pipe is made of silicon rubber or SEBS. There is provided a heat sterilization device for a mineral water dispenser which is formed of a selected material and has an inner surface coated with LLDPE.

According to this invention, when the set time of the timer is reached, the solenoid valve is opened and the circulation pump is operated, and the hot water stored in the hot water tank circulates in the piping system, so that the storage tank and the piping system are automatically heated. Sterilized. Moreover, since the present invention selects and uses a material that does not cause off-flavors and odors to adhere to the site, even if it is used for a long period of time, the original subtle flavor of mineral water that is very sensitive to sensuality is impaired. There is no nasty smell.

  Since the present invention is configured to sterilize the storage tank and the piping system by circulating the hot water in the hot water tank in the piping system, it is necessary to attach a heater to a part of the piping system or a cold water tank. Since the property is lost, the number of heater installation points can be reduced, and the amount of power used can be reduced. Therefore, the device manufacturing cost and the running cost can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a hot water tank 3 and a cold water tank 4, which are two types of storage tanks, are supplied from a drinking water container 1 such as a bag-in-box container stored in a refrigerator 25 through a supply pipe 2. The drinking water is guided by its own weight, the drinking water is heated by the heater 5 attached to the hot water tank 3, and the drinking water is cooled by the cooler 6 attached to the cold water tank 4. And hot water can be poured out from the hot water pouring valve 7 connected to the hot water tank 3, and cold water can be poured out from the cold water pouring valve 8 connected to the cold water tank 4. Furthermore, the hot water tank 3 and the cold water tank 4 are connected by a communication pipe 11 with a circulation pump 9 and a circulation electromagnetic valve 10 interposed therebetween. Therefore, at the time of heat sterilization, when the hot water pouring valve 7 and the cold water pouring valve 8 are closed and the circulation solenoid valve 10 is opened and the circulation pump 9 is driven, the cold water tank 4, the supply pipe 2 and the communication pipe 11 are heated. Hot water from the tank 3 circulates, and further, the hot water circulated through the piping and the like is heated by the heater 5 attached in the hot water tank 3 so that the temperature is maintained at 70 ° C. or higher, and is necessary for heat sterilization. The inside of the piping and the like can be sterilized with warm water maintaining the temperature.

  In FIG. 1, 12 is a steam vent pipe of the hot water tank 3, 13 is a hot water drain valve, 14 is a cold water drain valve, 15 is a refrigerant supply pipe, 16 is a switching solenoid valve, 17 is a condenser, and 18 is a condenser fan motor. , 19 is an electric compressor, 20 and 21 are refrigerant return pipes, 22 is a refrigerant supply pipe, 23 is an evaporator (cooler) in the refrigerator, 24 is a fan motor in the refrigerator, 25 is a refrigerator, and 26 is a door of the refrigerator 25. , 27 is a partition in the refrigerator 25, and 28 is a shelf on which the drinking water container 1 is placed. The switching electromagnetic valve 16 is a device that supplies refrigerant in order to prevent and adjust the room temperature in the refrigerator or the temperature of the cold water tank 4 to be higher than a set value.

  In this apparatus, the drinking water container 1 is a sealed container of a bag-in-box type container (hereinafter referred to as a BIB container), and the spout formed by being connected to the inner bag of the BIB container is connected to the supply pipe on the dispenser side. Connect with. The spout has a neck, a peelable seal is affixed to the top of the neck, and a sealing film is provided in the back of the neck to sterilize drinking water filled in a sterile condition. Conserved. At the time of connection with the supply pipe on the dispenser side, the drinking water container 1 is attached by peeling off the seal on the top surface of the neck of the spout. The refrigerator 25 to which the BIB container in the dispenser is attached is equipped with a cooling device, and the drinking water in the container can be cooled to about 4 to 10 ° C. with the BIB container. This is because the drinking water is stored at a low temperature at which it is difficult for germs to propagate in order to bring the drinking water to a low temperature preferable for drinking and to reduce the possibility of contamination of the drinking water in the BIB container. Moreover, since the connection site | part of a BIB container and a dispenser is also in the state interrupted | blocked from the open air in the refrigerator, and it is put in a low temperature atmosphere, miscellaneous bacteria cannot invade and propagate easily. Conventionally, there have been many mechanisms for connecting a connector provided from the dispenser side via a supply hose to the spout on the BIB container side. The connector was contaminated and unsanitary. In addition, when using a bottle that is often found in Europe and the United States as a drinking water container, open the spout at the mouth of the bottle and turn the bottle upside down into the water supply reservoir provided at the top of the dispenser. It is a mechanism to insert the spout, but the water supply reservoir on the dispenser side and the spout on the bottle side are exposed, and even when connected, the connection part is not blocked from the outside air, and very invading and adhering bacteria are very difficult. There were many.

  Next, FIG. 2 shows details of the piping system. In FIG. 2, the supply pipe 2 is inserted into the outlet 29 of the drinking water container 1, and a pair of hoses 32, 32 are firmly connected by fasteners 33, 33 to a three-way connector 31 that is sealed and connected by an O-ring 30. The pipes 34 are firmly connected to the hoses 32 and 32 by fasteners 35, respectively. Here, the three-way connector 31 is made of stainless steel, and as shown in FIG. 3, has T-shaped through holes 38 having connecting pipe portions 37, 37 protruding on both sides of the main body 36, and the main body 36 has a BIB. It has a structure having a sharp tube portion 39 provided with a sharp end portion 39a to be pierced through the sealing film of the spout 29 of the container. The three-way connector 31 is provided in the vicinity of the connection part with the spout 29 of the drinking water container so that heat sterilization by circulating hot water can be performed to the end of the dispenser, and the three-way connector 31 is made of metal. In this way, the vicinity of the spout can be sterilized by heat conduction. The O-ring 30 is made of silicon rubber and is in sliding contact with the concave portion of the sharp cylindrical portion 39 of the three-way connector 31 to prevent the O-ring 30 from easily moving in the vertical direction. The O-ring 30 prevents leakage of drinking water when connected to the sharp tube portion 39 and the spout 29 of the drinking water container dispenser. Further, the hose 32 is made of rubber or synthetic resin, and as shown in FIG. 4, in the longitudinal cross-sectional structure thereof, LLDPE coatings 32 a and 32 b are applied to both the inner and outer surfaces of the hose body 32 made of SEBS material. The coating 32b is finished to be thinner than that on the inner surface side. The pipe 34 is made of stainless steel.

  Next, in FIG. 2, the pipes 34 and 34 are each firmly connected to a hose 40 by a fastener 41, and the hoses 40 and 40 are respectively connected to pipes 42 and 42 protruding from the hot water tank 3 and the cold water tank 4. 43 is firmly connected. The communication piping system 11 is configured such that the hose 45 is firmly connected to the T-shaped pipe 44 projecting from the bottom of the hot water tank 3 with the fastener 46, and the pipe 47 is firmly connected to the hose 45 with the fastener 48. The hose 49 is firmly connected with the fastener 50. The hose 49 is firmly connected to the inlet port 51 of the circulation pump 9 with a fastener 52, and the hose 54 is firmly connected to the outlet port 53 of the circulation pump 9 with a fastener 55. Further, a pipe 56 is firmly connected to the hose 54 with a fastener 57. Further, a hose 58 is firmly connected to the pipe 56 with a fastener 59, and the hose 58 is firmly connected to an inlet port 60 a of the circulation solenoid valve 10 with a fastener 61. Here, the hoses 40, 45, 49, 54, 58 are made of the same material as the hose 32, and the pipes 42, 47, 56 are made of the same material as the pipe 34. The circulation pump 9 is made of reinforced PP with glass fiber in both the casing and impeller, the spindle is made of ceramic, the thrust is made of polyethylene, the O-ring is made of fluoro rubber, and the bearing is made of Luron alloy. The circulation solenoid valve 10 is made of polyacetal in the body, silicon rubber in the valve seat and packing, stainless steel in the guide and spring, and stainless steel in the plunger.

  A hose 62 is firmly connected to the outlet port 60 b of the circulation solenoid valve 10 with a fastener 63, and a pipe 64 connected in a branch shape to a pipe 66 protruding from the cold water tank 4 is firmly connected to the hose 62 with a fastener 65. Is done. At this time, the cold water pouring valve 8 is provided in the vicinity of the piping system, and heat sterilization by circulating hot water is easy. A cold water pouring valve 8 is connected to the pipe 66 via a packing 67. The cold water pouring valve 8 is the same as the hot water pouring valve 7 connected to the pipe 68 projecting from the hot water tank 3 through the packing 69, and as shown in FIG. The connecting pipe portion 78 is integrally formed in an L shape, and a cap 79a having a lever 79b is crowned and coupled to the main body 79, and a notch such as a slit 79d is formed at the tip of the water outlet 79c of the main body 79. Thus, the surface tension at the tip of the water outlet is hindered, so that stagnant water in the vicinity of the water outlet 79c is easily removed, and so-called draining is improved. This configuration is very effective because the area around the water outlet 79c is in contact with the outside air, and when the water is stagnant, it is very easy for bacteria to enter and grow. A drain pipe 70 hangs down and protrudes from the bottom of the cold water tank 4, and the cold water drain valve 14 is connected to the drain pipe 70. The cold water drain valve 14 is the same as the hot water drain valve 13. The steam vent pipe 12 has a hose 72 firmly connected to a stainless steel pipe 71 projecting from the hot water tank 3 with a fastener 73, and the hose 72 is firmly connected to a pipe 74 with a fastener 75. The hose 76 is firmly connected by a fastener 77. The pouring valves 7 and 8 are made of polysulfone, the hot water tank 3 and the cold water tank 4 are made of stainless steel, the pipes 64 and 66 are made of the same material, and the packings 67 and 69 are made of silicon rubber. .

  The drain valve is made of brass and can be heat sterilized by utilizing the heat conduction of the material during heat sterilization by circulating hot water.

  The selection of the material of the parts in the dispenser where the drinking water comes into contact is not only functional as a part in the device, but also sanitary to drinking water and sensitive to drinking water. It is important not to have a negative impact. However, the conventional dispenser does not take into consideration the sensual influence on drinking water at all, and there are cases where the drinking water has a strange odor such as a metal odor or rubber odor or a metal ion. In particular, in the case of drinking water having a subtle flavor such as mineral water, it is necessary to preserve the flavor. Therefore, the hot water tank, the cold water tank and the pipes of the piping system are resistant to corrosion, heat conductivity and resistance to aging. Stainless steel is selected as a material that satisfies the point of deterioration and does not affect the drinking water sensuously. For example, SUS316, SUS304, etc. are preferably used. The hose is preferably silicon rubber or SEBS from the viewpoints of flexibility, resistance to internal deformation when bent, heat and cold resistance, and low adsorption to off-flavor materials. Further, in order to suppress the influence on the sensory surface as much as possible, it is preferable to use those materials further coated with LLDPE. As a coating method, it is preferable to use an adhesive or the like by a co-extrusion method because the use of an adhesive or the like is considered inappropriate in view of the influence on safety and sensory aspects.

  For the O-ring, packing, and solenoid valve, silicon rubber or fluororubber is selected from the viewpoint of satisfying the heat and cold resistance and low adsorption to a material with a strange odor. For the hot water pouring valve and the cold water pouring valve, polysulfone or PP is selected from the viewpoints of satisfying heat resistance and cold resistance, dimensional accuracy, and appearance, and having low adsorption to off-flavor materials. For the valve of the dispensing valve, silicon rubber or fluororubber is selected because it satisfies the points of shape recovery of deformation, crack resistance, heat resistance and cold resistance, and has low adsorption to off-flavor materials. The casing and impeller of the circulation pump and the body of the circulation solenoid valve satisfy the points of heat and cold resistance, crack resistance, dimensional accuracy, and dimensional stability. From the viewpoint of low, polyacetal, reinforced PP with glass fiber, or polysulfone can be selected. The three-way connector is made of stainless steel because it has thermal conductivity, heat and cold resistance, dimensional accuracy, sharpness for piercing the sealing film of the spout of the BIB container, durability for that purpose, and no off-flavor material. Or polysulfone can be selected. If it is stainless steel, for example, SUS316, SUS304 or the like is preferably used. The cold water drain valve, the hot water drain valve and the drain pipe are preferably selected from materials such as stainless steel and brass having good thermal conductivity.

  Next, the example which assembled the said apparatus as a water server is shown in FIG. 6 is a front view, FIG. 7 is a plan view, FIG. 8 is a cross-sectional side view, FIG. 9 is a rear view excluding the back wall, FIG. 10 is a cross-sectional view taken along line AA in FIG. Figure (horizontal plate periphery), FIG. 12 is a bottom view of FIG. 11, in which 80 is a vertically long casing having a height of about 140 cm, a front width of about 35 cm and a depth of about 45 cm. As shown in FIGS. 1 and 8, it is formed in a box shape that can be sealed, and a device storage portion 81 that communicates with the lower portion is formed. A panel 82 is attached and fixed to the lower part of the door 26 on the front surface of the middle part, and an appropriate hot water temperature lamp 83, an appropriate cold water temperature lamp 84, and a sanitation lamp 85 are disposed on the panel 82. Further, a recess 86 is formed in the lower part of the panel 82, the hot water pouring valve 7 and the cold water pouring valve 8 are disposed on the upper part of the concave part 86, and a detachable removable cup capable of placing a cup or the like. A drain pan 87 is arranged.

  As shown in FIG. 8, the refrigerator 25 has an evaporator 23 and an internal fan motor 24 fixed to the back wall side, an inner plate partition wall 27 that hangs down on the front surface, and a shelf plate 28 that is provided below the partition wall 27. It is provided horizontally and the drinking water container 1 is placed on the shelf board 28.

  As shown in FIGS. 11 to 15, the shelf board 28 has a semicircular notch 98 that opens in the direction of the door for fitting the neck of the spout 29 of the drinking water container, In front of the cutout portion 98, a triangular taper portion 99 connected from the front surface of the shelf board to the cutout portion 98 is provided, and the shelf board 28 is provided with a half taper on both sides of the front taper portion 99 on the door side. A finger hooking portion 100 that is a circular convex portion is provided. Furthermore, a fixing lever 101 is fixed to a lower part of the tapered portion 99 provided on the shelf board 28 at one end in a position parallel to the shelf board 28, and is provided so as to be rotatable in the horizontal direction. It is locked with the fixing lever 101 tightened. When placing the drinking water container 1 on the shelf 28, with the locking lever 101 unlocked and opened, the drinking water container 1 is temporarily placed in front of the shelf and the neck of the spout 29 of the drinking water container 1 is The neck of the spout 29 of the drinking water container 1 is accurately directed toward the notch 98 by the taper 99 by pushing the position of the drinking water container 1 to the rear of the shelf with the taper 99 substantially aligned. It is guided and can be easily fitted into the notch 98, and the spout 29 is fixed in a position necessary for connection with the dispenser. Furthermore, by closing and locking the fixing lever 101, the position of the spout 29 of the drinking water container 1 is prevented from moving.

  A connection lever 92 that fixedly supports the three-way connector 31 is provided at the lower center of the innermost part of the notch 98 so as to be pivotable up and down about a shaft 93. A sharp end 39a is provided. Further, the grip portion 92 a at the front end portion of the connection lever 92 is provided so as to be rotatable in the left-right (horizontal) direction about the shaft 95. In addition, a substantially T-shaped guide 102 is provided on the outer periphery of the movable peripheral region of the connection lever 92, and a vertical portion of the guide 102 has a substantially U shape opened upward. Guide up and down movement. The shaft 93 is provided on a support plate 94 that is fixed to the center of the back part below the shelf plate 28.

  Therefore, when connecting the drinking water container 1 and the dispenser, as shown in FIG. 13, the drinking water container 1 is placed on the shelf board 28, and the spout 29 of the drinking water container 1 is inserted into the notch 98. The groove 29a formed in the neck is fitted into the taper 99, 99, and the finger is applied to the finger hook 100 provided on the shelf 28 in a state where the fixing lever 101 is locked and locked as shown in FIG. The hand is stabilized, and the gripper 92a of the connecting lever 92 is held by the finger and moved upward along the longitudinal portion of the guide 102. As a result, the sharp end 39a of the three-way connector 31 moves upward to enter the inside of the spout 29, breaks through the sealing film provided inside, and the drinking water in the drinking water container 1 flows into the three-way connector 31 by its own weight. To do. As shown in FIG. 15, the connecting lever 92 has a sharp end 39 a that breaks through the sealing film inside the spout 29 of the drinking water container 1, and then moves the grip 92 a of the connecting lever 92 to the lateral portion of the guide 102. Move it to the left or right along it, and fold it up. Since the shaft 93 to which the connection lever 92 is attached is fixed at the back, there is a distance from the power point of the grip portion 92a of the connection lever 92, and the sharp end of the three-way connector 31 therebetween The sealing film inside the spout 29 can be pierced reliably with a small force with respect to the point of action of 39a. Further, the connection lever 92 may be moved along the guide 102, and the operation can be performed without error. Further, after the connecting lever 92 breaks through the sealing film inside the spout 29, the holding portion 92a of the connecting lever 92 is moved left or right about the shaft 95 as shown in FIG. Since the connecting lever 92 is prevented from falling by the guide 102 because it is supported by the direction portion, the connection is not released, and the gripping portion 92a of the connecting lever 92 is compactly folded and is not used in the refrigerator. Space is not required.

  When disconnecting the drinking water container 1 from the dispenser, conversely, the holding lever 92a of the connecting lever 92 is held and moved laterally along the guide 102, and the connecting lever 92 is aligned with the vertical portion of the guide 102. By moving it downward, the connection between the drinking water container 1 and the dispenser is released.

  As shown in FIGS. 8 to 10, the hot water tank 3 and the cold water tank 4 are diagonally arranged and stored in the equipment storage portion 81 at the lower part of the refrigerator 25, as shown in FIGS. 8 to 10. A circulation pump 9 is disposed in the vicinity of the hot water tank 3 and the cold water tank 4. By arranging the bulky hot water tank 3 and cold water tank 4 on the diagonal line, the entire dispenser can be designed compactly, and the piping and the like can be compactly accommodated. In addition, an electrical box 103 is provided at the lower part thereof, and a sanitation timer 96 is provided on the front side thereof. The sanitation timer 96 opens the circulation solenoid valve 10 at predetermined time intervals and drives the circulation pump 9. When the time necessary for sterilizing the piping system has elapsed, the sanitation timer 96 is all turned off. An electric circuit for returning to the original state is included. A hot water drain valve 13 is disposed on the side of the electrical box 103, a condenser 17 and a condenser fan motor 18 are disposed on the lower side of these, and an electric compressor 19 is disposed on the innermost portion. Yes. In order to operate the hot water drain valve 13 and the sanitation timer 96, a cover 97 is detachably attached to the entire lower surface of the apparatus. In addition, the display etc. which show the quality of the drinking water in the drinking water container 1, a manufacturer, etc. can be given freely on the surface of the door 26. FIG.

When the water server thus configured is installed in an office room, a canteen or the like and connected to a power source, the refrigerator 25 is appropriately cooled by the evaporator 23 so that germs in the drinking water W in the drinking water container 1 can be obtained. growth is possible safely stored by suppressing the, flowing in thick line arrow direction in the piping system in Figure 1, water which has flowed into the hot water tank 3 is heated by the heater 5, the drinking water W that has flowed into the cold water tank 4 Is further cooled by the cooler 6, and when the hot water appropriate temperature lamp 83 and the cold water appropriate temperature lamp 84 of the panel 82 are lit, if the lever of the hot water pouring valve 7 is pushed down and opened, an appropriate amount of hot water is obtained. If the lever 8 is pushed down and opened, cold water that has been cooled down will be poured out.

And if the timer 96 for sanitation is set so that the heat sterilization of the piping system including the hot water tank and the cold water tank can be automatically performed every fixed period, when the set time arrives, The sanitation lamp 85 on the panel 82 blinks, the hot water appropriate temperature lamp 83 and the cold water appropriate temperature lamp 84 are extinguished, the normally closed circulation solenoid valve 10 is opened, and the circulation pump 9 is operated. Flowing in the direction indicated by the thin line in the piping system in FIG. 1, the heated drinking water W in the hot water tank 3 flows into the cold water tank 4 through the communication pipe 11, flows into the supply pipe 2, and returns to the original hot water. Reflux into tank 3. At the time of heat sterilization, the temperature of the drinking water W in the hot water tank 3 is set to be 70 ° C. or higher, and the temperature of the hot water circulating in the hot water tank is maintained and enters the supply pipe 2 and the tanks 3 and 4. It is possible to kill all the germs that have been killed. Moreover, when warm water circulates, it can sterilize to the last part using the heat conduction of a site | part. After the set fixed time, the circulation solenoid valve is closed, the circulation pump 9 is stopped, the temperature setting of the heater 5 attached to the hot water tank is returned to normal, and the heat sterilization is automatically terminated.

  The dispenser (A) of the present invention shown in FIGS. 1 to 15 was manufactured. As a control, a dispenser (B) similar to the dispenser (A) is manufactured except that the three-way connector provided in the vicinity of the connection portion between the dispenser and the spout of the drinking water container is made of plastic. Except that it is connected to the piping system in place of the stainless steel type I joint provided with a sharp cylindrical part on the drinking water container side used in the conventional dispenser, and the type I connector is located in the refrigerator. Produced a dispenser (C) similar to dispenser (A). Further, a dispenser (D) similar to the dispenser (A) was produced as a control except that a conventional valve having no notch was used as the cold water pouring valve.

In addition, all the dispensers are set so that the drinking water temperature in the drinking water container in the refrigerator is 10 ° C. or lower, the cold water is 4 ° C. to 10 ° C., and the hot water is 80 ° C. to 90 ° C. The effective internal volumes of the cold water tank and the hot water tank were 2.7 liters respectively, and the heater attached to the hot water tank was 401 W.
(Example 1) Evaluation of heat sterilization performance of dispenser Spingomonas paucimobilis (ATCC 29837) and Pseudomonas fluorescens Migula (ATCC 13525) are used in mineral terrestrial turf, and are known as varicella microorganisms. Confirmed to do. After culturing these microorganisms on a standard agar medium at 27 ° C. for 5 days, they are suspended in 10 ml of commercially available mineral water, one platinum loop each, and further diluted to about 10 ² CFU / ml with the same mineral water. And cultured at 27 ° C. for 5 days. After culturing, the bacterial solution was suspended in 10 liters of mineral water packed in a commercially available unopened bag-in-box container and cultured at 25 ° C. for 48 hours to prepare two types of mineral water bacterial solution. At this time, the concentration of the mineral water bacterial solution containing Spingomonas pouch mobilis was 1.76 × 10 ⁵ CFU / ml, and the concentration of the mineral water bacterial solution containing Pseudomonas fluorescens was 3.04 × 10 ⁶ CFU / ml. .

  The following experiment was conducted with the dispenser (A) of the present invention using each of these two types of mineral water bacterial solutions. After 70% ethanol aqueous solution was circulated in the dispenser (A) for 5 minutes and sterilized, a BIB type container filled with 10 liters of mineral water, which was unopened on the market, was connected, and the mineral water was circulated in the dispenser. The solution was poured out and the aqueous ethanol solution in the dispenser was washed. Thereafter, the drain valve was also opened, and all the water was drained so that no mineral water remained in the dispenser. Thereafter, a BIB-type container containing mineral water bacterial solution was connected to the dispenser, and after confirming that the cold water tank was full, 200 ml was poured out from the cold water dispensing valve, and sample A was obtained. At this time, the dispenser is filled with only the mineral water bacteria solution from the BIB container containing the mineral water bacteria solution, and the mineral water bacteria solution is distributed throughout the dispenser by pouring from the cold water dispensing valve. It was distributed to the tip of the dispensing valve.

  Next, the BIB type container containing the mineral water bacteria solution was removed from the dispenser, and the BIB type container packed with 10 liters of mineral water that was not yet opened on the market was connected, and the heat sterilizer was operated. All the heat sterilizers of the dispensers were set so that the heater attached to the hot water tank stopped heating when the temperature of the hot water in the hot water tank exceeded 70 ° C, and the circulation pump was set to run for 60 minutes. . At this time, the tank and the piping system in the dispenser are in a state where the mineral water bacteria solution from the BIB type container containing the mineral water bacteria solution previously connected is filled.

  Immediately after heat sterilization, 200 ml of the sample equivalent to the amount dispensed from one cup of cold water from the chilled water dispensing valve is taken as sample 2 Then, 1500 ml was poured out as specimen D in order to continuously dispense more than half of the drinking water in the cold water tank.

  Each specimen obtained was subjected to a microbial test. Microbiological examination was carried out by diluting 0.1 ml of each specimen 1 to 100 times, spreading it on a standard agar medium, culturing at 23 ° C. for 7 days, and counting the number of colonies. The results are shown in Table 1.

  Accordingly, it has been found that the dispenser of the present invention can obtain a sufficient sterilizing effect even if there is a growth of microorganisms in the dispenser by the operation of the heat sterilizer.

(Example 2) Confirmation of heating effect by heat sterilization of parts in dispenser Using the dispenser (A) of the present invention and dispensers (B) and (C) manufactured as controls, heat sterilization of each part in the dispenser The heating effect at the time was confirmed by the following experiment. As a guide for heat sterilization, the temperature was maintained at 55 ° C. for 5 minutes or longer.

  At room temperature of 35 ° C., a BIB type container filled with 10 liters of mineral water that was not yet opened was connected to the dispenser, and the experiment was started after 1 hour. At this time, the temperature of the drinking water in the drinking water container placed in the refrigerator of the dispenser was 14 ° C.

  The heat sterilization apparatus of any dispenser was set so that the heater attached to the hot water tank was stopped when the hot water in the hot water tank reached 70 ° C. or higher, and the circulation pump was operated for 70 minutes. The temperature of each part of the dispenser was measured from the start of the circulation pump until 90 minutes after the start of the operation, and the change with time was observed. At this time, the dispenser (A) is a three-way connector sharp tube base part a, a three-way connector body central part b, a pipe part c of a piping system connected to a hot water tank located in the refrigerator, and the dispenser (B) is three-way. Sharp tube base portion a ′ of the connector, central body portion b ′ of the three-way connector, pipe portion c ′ of the piping system connected to the hot water tank located in the refrigerator, and drinking water of the I-type connector in the dispenser (C) The container outlet vicinity part d, the center part e of the I-type connector, the piping system vicinity part f of the I-type connector, and the connection part part g between the I-type connector and the piping system were measured.

  The dispenser (A) of the present invention and the dispenser (B) manufactured for comparison of the materials of the dispenser (B) are connected to the main body central portions b and b 'of the dispenser (B) and a hot water tank located in the refrigerator. The pipes c and c ′ of the piping system rise from the start of the circulation pump operation, rise after reaching 55 ° C. in 17 minutes, reach a maximum of 75 ° C., and the heater attached to the hot water tank When it turned off, the temperature began to drop, but it was 63 ° C. even after 90 minutes. The sharp tube base a of the three-way connector of the dispenser (A) of the present invention rises in temperature from the start of pump operation and rises to 55 ° C in 33 minutes after the start, reaching a maximum of 65 ° C. The temperature started to drop when the heater attached to the hot water tank was turned off, but it was 57 ° C even after 90 minutes, but the sharp tube base of the plastic three-way connector of the dispenser (B) dispenser The temperature of a ′ fluctuated in the range of 52 ° C. to 28 ° C. at maximum.

  In the dispenser (C), the temperature at the connecting part g between the I-type connector and the piping system rises from the start of the circulation pump operation, and rises to 55 ° C in 22 minutes, reaching a maximum of 74 ° C. The temperature started to drop when the heater attached to the hot water tank was turned off, but it was 61 ° C. even after 90 minutes. The temperature began to rise 26 minutes after the start of pump operation, but only reached a maximum of 45 ° C. When the heater attached to the hot water tank was turned off, the temperature began to drop and was 90 ° C after 90 minutes. It was. In the central part e of the I-type connector, the temperature began to rise 26 minutes after the start of the circulation pump operation, but it reached only a maximum of 45 ° C, and the temperature dropped when the heater attached to the hot water tank was turned off. After 90 minutes, the temperature was 26 ° C. The temperature in the I-connector vicinity f of the I-type connector started to rise 8 minutes after the start of the circulation pump operation, but the maximum time was 57 ° C and the time of continuously maintaining above 55 ° C was 4 minutes. The temperature started to drop when the attached heater was turned off, and was 90 ° C. after 90 minutes.

  As a result, when the sterilizable temperature and time are maintained at 55 ° C. or higher for 5 minutes, in the dispenser (A), the three-way connector base part a, the three-way connector body center part b, and the refrigerator are positioned. The pipe c of the piping system connected to the hot water tank was maintained at 55 ° C. or higher for 5 minutes or longer at any part.

  In the dispenser (B), only the sharp tube base a 'of the plastic three-way connector could not reach a temperature exceeding 55 ° C, and the effect of heat sterilization was not obtained.

  In the dispenser (A) of the present invention, since the three-way connector itself is made of metal, the temperature rises due to the circulating hot water, and the temperature rises to a certain extent to the end of the three-way connector due to heat conduction. It seems that the temperature of a was maintained at 55 ° C. or higher for 5 minutes or longer. However, the sharp cylindrical base a ′ of the plastic three-way connector of the dispenser (B) is hardly affected by the temperature of the cooled drinking water flowing from the drinking water container, while the temperature of the three-way connector itself hardly increases. It seems that the temperature did not rise.

  In the dispenser (C), any part of the I-type connector could not be maintained at 55 ° C. or more for 5 minutes, and the effect of heat sterilization could not be obtained. This is because the hot water does not circulate in the I-type connector, the cooled drinking water from the drinking water container flows into the I-type connector, and the I-type connector is located in the refrigerator, so that it has a cooling effect. The drinking water is stagnant in the state of being subjected to heat, so even if the temperature rise of the I-type connector itself and the thermal conductivity of the material are utilized by the heat of the hot water from the vicinity of the piping system through which the hot water circulates, the I-type connector It seems that the temperature could not be raised. Since the type I connector is located at the uppermost stream in the dispenser, if contamination or proliferation of germs occurs in this part, the entire dispenser is contaminated with the use of the dispenser. This is the most necessary site.

Further, in the dispenser (A) of the present invention, similarly, a cold water pouring valve base, a circulation solenoid valve, a circulation pump, a hot water tank bottom, a cold water tank bottom, and a cold water tank are connected via a drain pipe. The temperature of the chilled water drain valve was measured, and in all cases, the temperature began to rise after the operation of the circulation pump was started, and the temperature of 55 ° C. or higher was continuously maintained for a minimum of 30 minutes. Furthermore, in the dispenser (A) of the present invention, the drinking water in the drinking water container placed in the refrigerator and the temperature in the refrigerator were also measured, but both the drinking water in the drinking water container and the temperature in the refrigerator were measured. Although an increase in temperature within the range of 5 ° C. was observed, no significant temperature change was observed. Therefore, the beverage in the refrigerator and in the drinking water container placed in the refrigerator is in a state where the low temperature is maintained, and unnecessary cooling after the heat sterilization is unnecessary, and in the drinking water in the drinking water container It is possible to maintain a low temperature for suppressing the growth of microorganisms.
(Embodiment 3) Effect of notch at water outlet tip of cold water dispensing valve As parts exposed to the outside with a dispenser, water outlet tip of cold water dispensing valve and water outlet tip of hot water dispensing valve We investigated a commercial dispenser installed in the office room for the contamination of the two microorganisms. The investigation method is to wipe the test site with a cotton swab moistened with sterile water, rinse the wiped cotton swab in a test tube containing 1 ml of sterile water, culture in 0.1 ml of the rinse solution, and count the number of colonies. I went to count. As a result of the investigation, microorganisms of 10 ³ CFU / ml or more were detected at the water outlet tip of the cold water dispensing valve of the dispenser, and microorganisms were detected only at 10 CFU / ml or less at the water outlet tip of the hot water dispensing valve. . The reason why microorganisms were detected at the tip of the water outlet of the chilled water dispensing valve was that stagnation of drinking water was observed at the tip of the water outlet. The growth of microorganisms can be considered. Then, the effect which suppresses the proliferation of microorganisms in a cold water extraction valve | bulb using the dispenser (A) of this invention and the dispenser (D) in which the notch part is not provided in the cold water extraction valve | bulb manufactured as a control | contrast is used. The following experiment was conducted.

The strains of Spingomonas paucimobilis (ATCC 29837) and Pseudomonas fluorescens Migula (ATCC 13525) used in Example 1 were each cultured on a standard agar medium at 27 ° C. for 5 days. Each was mixed and suspended in 10 ml of commercially available mineral water, further diluted to about 10 ² CFU / ml with the same mineral water, and cultured at 27 ° C. for 5 days. This was mixed with 10 liters of mineral water packed in a commercially available unopened bag-in-box container, and cultured at 25 ° C. for 48 hours to prepare a mineral water mixed bacterial solution. At this time, the concentration of microorganisms was 2.40 × 10 ⁵ CFU / ml.

  After making sure that there is no drinking water in any of the dispensers, connect a BIB-type container containing the mineral water mixed bacteria solution and confirm that the cold water tank is full. 500 ml was poured out from the outlet valve. At this time, the dispenser is filled with only the mineral water mixed bacterial solution from the BIB container containing the mineral water mixed bacterial solution, and the mineral water mixed bacterial solution is dispensed from the cold water dispensing valve. It has been distributed to the whole and completely distributed to the tip of the dispensing valve.

  After that, remove the BIB container containing the mineral water mixed bacteria solution from any dispenser, connect the BIB container filled with 10 liters of mineral water that was unopened on the market, and operate the heat sterilizer. It was. All the heat sterilizers of the dispensers were set to stop heating when the heater attached to the hot water tank reached 70 ° C. or higher, and the circulation pump was set to operate for 120 minutes. At this time, the tank and the piping system in the dispenser are in a state of being filled with the mineral water mixed bacteria solution from the BIB type container containing the mineral water mixed bacteria solution previously connected.

  After the heat sterilization, the dispenser was left unused for 1 day, and the mineral water was kept stationary without moving in the dispenser.

  After standing for 1 day, 1 liter was poured out from the cold water dispensing valve once a day, and the first 10 ml and the last 10 ml of 1 liter were sampled and microbiological examination was performed. Further, after 10 days, the sample was replaced with a BIB type container filled with 10 liters of mineral water, which was a new unopened commercial product, and sampling was performed in the same manner for 10 days to conduct a microbiological examination. This is for confirming the time-dependent change in the number of microorganisms due to the stagnation time of the mineral water in the dispenser after heat sterilization. In addition, the first 10 ml of 1 liter poured out contains the accumulated water at the water outlet tip of the cold water dispensing valve, and the final 10 ml after the water accumulated at the water outlet tip is completely poured out. Sample containing mineral water in the tank.

  The heat sterilizer of the dispenser was not operated at all after being left for one day.

  Microbiological examination was performed by smearing 0.1 ml of each specimen on a standard agar medium, culturing at 23 ° C. for 7 days, and counting the number of colonies.

As a result, the dispenser (D) detected 1.68 × 10 ⁶ CFU / ml microorganisms in the first 10 ml of the first day and 9.52 × 10 ³ CFU / ml in the final 10 ml. In the dispenser (A) of the present invention, microorganisms of 220 CFU / ml in the first 10 ml of the first day and 11 CFU / ml in the final 10 ml were only detected. After that, in the dispenser (D), microorganisms of 2.20 × 10 ⁵ CFU / ml in the first 10 ml of the second day and 1.15 × 10 ³ CFU / ml in the last 10 ml were collected at the beginning of the third day. 10 ml of 2.18 × 10 ⁵ CFU / ml final 10 ml of 1.06 × 10 ³ CFU / ml of microorganisms in the first 10 ml of 1.71 × 10 ⁴ CFU / ml of final 556 CFU / ml of microorganism was detected in 10 ml of the sample. From the fifth day to the 20th day, the same number of microorganisms as in the fourth day were detected.

  In the dispenser (A) of the present invention, microorganisms having the same number of bacteria as in the first day were detected from the 2nd day to the 5th day, but from the 6th day, the microorganisms in the first 10 ml or the final 10 ml. Was only detected in the range of 0 to a maximum of 14.

  As described above, the dispenser of the present invention is provided with a notch at the water outlet tip of the cold water dispensing valve, thereby preventing the drinking water from staying at the water outlet tip of the cold water dispensing valve. Microorganisms did not grow at the site. The water outlet of the cold water pouring valve may not be sufficiently heated during heat sterilization, and it seems to grow in the drinking water in which attached microorganisms stay.

  Note that microorganisms were not detected at the tip of the water outlet of the hot water pouring valve because the temperature of the hot water poured out from the hot water pouring valve is at least 55 ° C or higher. Even if microorganisms adhere to the tip of the water outlet, it seems to have not died and proliferated because it was always in a heat-sterilized state by pouring hot water.

  According to the embodiment described above, the apparatus for heat sterilization, i.e., the heater is attached only to the hot water tank, and the necessity to attach a part of the piping system or the cold water tank is eliminated. It can be reduced and the amount of power used is small, so that it is possible to reduce the device manufacturing cost and the running cost.

  In addition, a three-way connector is provided in the vicinity of the connection portion with the outlet of the drinking water container, and a cold water extraction valve is provided in the vicinity of the piping system, so that heat sterilization by circulating hot water can be more effectively performed on the entire dispenser. It became so. Furthermore, since the three-way connector and the drain valve are made of a metal having high thermal conductivity, the surroundings of these parts can be heated. Also, among the parts that come into contact with drinking water in the dispenser, the parts closer to the connection part than the three-way connector that cannot be sterilized by circulating hot water are all located in a sealed refrigerator and are in a low-temperature atmosphere. It is difficult to grow. The drinking water container is also housed in the refrigerator. By each of these components and heat sterilization by circulating hot water, ensuring the safety of drinking water against microorganisms in the dispenser is strictly performed. Even when a drinking water container is attached or removed, a person does not usually come into direct contact with a portion that is in contact with drinking water, and there is almost no possibility of invasion of germs.

  Moreover, attachment and removal of a drinking water container can also be reliably and simply connected by a small force with a taper, a notch part, a guide, and a connection lever, and a drinking water container does not come off during use. Further, the connecting lever is in a folded state except for attachment and removal, and no useless space is required.

  Even if drinking water that is highly sensitive to sensuality, such as mineral water, is used in the dispenser of the present invention, the portion in contact with the drinking water in the dispenser does not impart a nasty smell to the drinking water, Therefore, even if it is used for a long period of time, it does not spoil the subtle flavor inherent in the drinking water and does not give off a nasty smell.

  Further, the drinking water container having a large volume in the dispenser is accommodated in the upper part, and the hot water tank and the cold water tank are provided diagonally in the lower part, whereby the apparatus of the entire dispenser can be assembled compactly.

Configuration overview diagram of the present invention Piping system diagram of the present invention Front view (A), bottom view (B) and side view (C) showing one component of the present invention Partial longitudinal sectional view showing one component of the present invention Side view (A), plan view (B) and rear view (C) showing one component of the present invention Front view of a water server embodying the present invention Plan view of a water server embodying the present invention Cross-sectional side view of a water server embodying the present invention Rear view excluding the back wall of the water server embodying the present invention AA sectional view of FIG. Partial enlarged side view of FIG. Bottom view of FIG. A perspective view (A) which shows the procedure which attaches a drinking water container to a dispenser, and the a section enlarged view (B) in the figure The perspective view which shows the procedure which attaches a drinking water container to a dispenser. The perspective view which shows the procedure which attaches a drinking water container to a dispenser.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Drinking water container 2 ... Supply piping 3 ... Warm water tank 4 ... Cold water tank 5 ... Heater 6 ... Cooling machine 7 ... Hot water pouring valve 8 ... Cold water pouring valve 9 ... Circulating pump 10 ... Circulating solenoid valve 11 ... Communication Pipe 12 ... Steam vent pipe 13 ... Hot water drain valve 14 ... Cold water drain valve 15 ... Refrigerant supply pipe 16 ... Switching solenoid valve 17 ... Condenser 18 ... Condenser fan motor 19 ... Electric compressor 20, 21 ... Refrigerant return pipe 22 ... Refrigerant supply pipe 23 ... Evaporator (cooler)
24 ... Fan motor in refrigerator 25 ... Refrigerator 26 ... Door 27 ... Bulkhead 28 ... Shelf

Claims (5)

A dispenser for drinking mineral water from a drinking water container via a piping system, in a heating and sterilizing apparatus for a mineral water dispenser having a cold water tank having a cooling device and a warm water tank having a heating device in the piping system,
The heat sterilizer includes a communication pipe connecting the cold water tank and the hot water tank, a circulation pump and a solenoid valve provided in the communication pipe,
The communication pipe includes a metal pipe and a hose connecting the metal pipe,
The metal pipe is made of stainless steel, the casing and impeller of the circulation pump and the body of the solenoid valve are made of a selected material of polyacetal, glass fiber reinforced PP or polysulfone, and the valve of the solenoid valve is Heat disinfection of a mineral water dispenser, characterized in that it is formed of a selected material of silicon rubber or fluoro rubber, the hose is formed of a selected material of silicon rubber or SEBS and the inner surface is coated with LLDPE apparatus. A dispenser for drinking mineral water from a drinking water container via a piping system, in a heating and sterilizing device of a mineral water dispenser having a cold water tank having a cooling device and a warm water tank having a heating device in the piping system,
The heat sterilizer includes a communication pipe connecting the cold water tank and the hot water tank, a circulation pump and an electromagnetic valve provided in the communication pipe, a timer for periodically operating the electromagnetic valve and the circulation pump, With
The communication pipe includes a metal pipe and a hose connecting the metal pipe,
The metal pipe is made of stainless steel, the casing and impeller of the circulation pump and the body of the solenoid valve are made of a selected material of polyacetal, glass fiber reinforced PP or polysulfone, and the valve of the solenoid valve is Made of selected material of silicon rubber or fluoro rubber, the pipe is made of stainless steel, the hose connecting the pipe is made of selected material of silicon rubber or SEBS and the inner surface is coated with LLDPE A heat disinfection device for a mineral water dispenser. In the heat sterilization apparatus of the dispenser of mineral water according to claim 1 or 2,
After a certain time from the operation, the solenoid valve is closed, the circulation pump is stopped, the temperature setting of the heating device of the hot water tank is returned to normal, and the heat sterilization is automatically terminated. A heat disinfection device for mineral water dispensers. In the heat sterilizer of the mineral water dispenser according to any one of claims 1 to 3,
A heat sterilization apparatus for a dispenser of mineral water, wherein the coating is performed by a co-extrusion method. In the heat sterilization apparatus of the dispenser of mineral water according to any one of claims 1 to 4,
The coating of the hose is a heat sterilization apparatus for a dispenser of mineral water, characterized in that the outer surface side is thinner than the inner surface side.

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