WO2012066626A1

WO2012066626A1 - Dispenser which can be sterilized by heat

Info

Publication number: WO2012066626A1
Application number: PCT/JP2010/070333
Authority: WO
Inventors: 和由村松
Original assignee: スパーク株式会社
Priority date: 2010-11-16
Filing date: 2010-11-16
Publication date: 2012-05-24

Abstract

The first invention relates to a dispenser comprising a cold water plumbing system for supplying refrigerated water, and a hot water plumbing system for supplying warmed water, wherein both systems are connected to one filling port by a three port valve which is a valve having three ports. The dispenser is characterized by a sterilization process which is performed by passing water through the cold water plumbing system and the hot water plumbing system by the three port valve, and by circulating hot water through both of the plumbing systems using a convection phenomenon caused by the difference of water temperatures. The dispenser is capable of performing thermal sterilization with a very simple structure in which only a three port valve is additionally used. A cold water filling port in which propagation of bacteria most likely occurs, can be sterilized by heat using the filling port both for cold water and hot water.

Description

Dispenser capable of heat sterilization

The present invention relates to a technique for sterilizing a dispenser that supplies hot and cold drinking water with heat.

When a dispenser that supplies drinking water supplies drinking water for a long period of time or when the supply has been stopped for a long time, the drinking water stagnates in the dispenser, particularly in its piping system, and various germs propagate. there is a possibility. Therefore, a dispenser having a device for sterilizing the pipe system of the dispenser with heat has been proposed (Patent Document 1).

Japanese Patent No. 3387526

The dispenser disclosed in Patent Document 1 includes a “device for sterilization by heat”. The “apparatus that sterilizes by heat” is not necessarily clear, but, for example, in the first embodiment in the above-mentioned document, it is a “heating apparatus by a heater”. The “heater” is considered to be a heating wire or the like from the piping configuration diagram of the first embodiment, but this is mounted on the piping or the cold water tank to sterilize them with heat.

As Patent Document 1 points out, this heat sterilization with a heater uses a special device to inject sterilizers and hot water into the dispenser, and to perform a simple sterilization treatment than a method in which a bacterial filtration device is installed in the dispenser. It is what makes it possible. However, mounting the heater around the piping or in the cold water tank itself requires manufacturing costs and labor.

In the above first embodiment, no heater is attached to the cold water inlet. From the viewpoint of the user of the dispenser, it is usually difficult to assume that the water inlet of the cold water is heated. Therefore, heating this part with a heater may cause a burn accident. However, the cold water injection port is not easily sterilized because the entire inner wall of the pipe from the valve to the tip of the water injection port is constantly exposed to the outside air when water is not injected. Has a big problem.

As another example of the “device for sterilization by heat”, the above literature circulates hot water in a hot water tank after providing a piping system that can be opened and closed by a solenoid valve between the piping system for cold water and the piping system for hot water. In the second embodiment, an apparatus for performing sterilization treatment by circulating through a piping system for cold water including a cold water tank by a pump is described.

In the second embodiment as well, it is difficult to include the water injection port itself in the circulation path, and as in the case of the first embodiment, it is difficult to sterilize the water injection port that is exposed to the outside air and easily propagates various bacteria. There's a problem.

The invention according to claim 1 includes a water intake port for taking drinking water, a three-way valve having three ports, and selecting any two of the three ports to allow drinking water to pass between the three ports. It is connected to one of the three mouths of the valve, and is a piping system through which drinking water passes between a water inlet for pouring out drinking water and one of the two inlets of the water intake and the three-way valve. The piping system for the chilled water, which is a piping system having a chilled water tank equipped with a cooler in the piping system, and the piping system through which drinking water passes between the intake port and the remaining one port of the three-way valve. The present invention relates to a dispenser having a hot water piping system, which is a piping system having a hot water tank equipped with a heating device in the piping system.

The invention according to claim 2 is a water intake port for taking drinking water, a cold water extraction valve for extracting cooled drinking water, a hot water extraction valve for extracting heated drinking water, and the intake port. A piping system through which drinking water passes between the cooling water pouring valve and a piping system for cooling water having a cooling water tank equipped with a cooler in the piping system, the intake port and the hot water A piping system through which drinking water passes between an outlet valve and a piping system for hot water, which is a piping system having a hot water tank equipped with a heating device in the piping system, and the cold water of the piping system for cold water A piping system through which drinking water passes between the end of the outlet valve side and the end of the hot water outlet valve side of the hot water piping system, and is an on-off valve for opening and closing water in the piping system A circulation piping system having That the dispenser, about.

The invention according to claim 3 has a water intake port for taking drinking water and two intake ports, and a selection type in which drinking water is selected from one of the two intake ports and water is poured from the spout port. A piping system through which drinking water passes between a dispensing valve and one of the two intake ports of the water intake and the selective dispensing valve, and a chilled water tank provided with a cooler in the piping system. It is a piping system through which drinking water passes between a piping system for cold water, which is a piping system, and between the intake port and the remaining intake port of the selective dispensing valve, and a heating device is provided in the piping system Drinking water between a hot water piping system that is a piping system having a hot water tank, the selective dispensing valve side end of the cold water piping system, and the selective dispensing valve side end of the hot water piping system Is a piping system through which the piping system The dispenser having a circulation piping system having an on-off valve for opening and closing the water flow, to.

The invention according to claim 4 is characterized in that the cold water tank and the hot water tank are installed such that the center of gravity of the drinking water in the cold water tank is higher than the center of gravity of the drinking water in the hot water tank. The dispenser according to claim 1.

The invention according to claim 5 automatically opens and closes between a port connected to the cold water piping system and a port connected to the hot water piping system among the three ports of the three-way valve according to a predetermined condition. The dispenser according to claim 1, further comprising an automatic opening and closing device.

The invention according to claim 6 relates to the dispenser according to claim 2 or 3, further comprising an automatic opening / closing device that automatically opens and closes the opening / closing valve according to a predetermined condition.

The invention according to claim 7 relates to the dispenser according to any one of claims 1 to 3, wherein a circulation pump is provided in the piping system.

The invention according to claim 8 relates to the dispenser according to claim 5 or 6, wherein a circulation pump is provided in a piping system, and the automatic opening and closing device controls the circulation pump.

The invention according to claim 9 includes a water intake port for taking drinking water, a cold water extraction valve for extracting cooled drinking water, a hot water extraction valve for extracting heated drinking water, and the intake port. A piping system through which drinking water passes between the cold water extraction valve and a piping system for cold water which is a piping system having a cold water tank in the piping system, and between the intake port and the hot water extraction valve A hot water dispenser having a hot water tank which is a piping system through which drinking water passes and a hot water tank having a heating device in the piping system, The first step of warming drinking water with a heating device, the second step of connecting the cold water pouring valve and the hot water pouring valve by piping, and both the cold water pouring valve and the hot water pouring valve are opened. Dispenser heat sterilization method comprising a third step of, regarding.

The invention of the present application has made it possible to perform heat sterilization with a very simple structure in which a three-neck valve and an on-off valve are additionally used. In addition, by using the outlet for cold water and hot water, it is possible to heat sterilize the outlet for cold water where germs are most likely to propagate.

The route figure showing the route of drinking water in case a user pours out drinking water cooled by the dispenser of Example 1. The route figure showing the route of drinking water when the user pours the drinking water warmed by the dispenser of the first embodiment Circulation route diagram showing the circulation route of drinking water when hot water is circulated by the convection phenomenon in the dispenser of Example 1 and the piping system is sterilized by heating. A route diagram of drinking water in the dispenser of Example 1 when neither drinking water nor heat sterilization using convection is performed. Cross-sectional structure around the intake Structure diagram of first three-neck valve in dispenser of embodiment 1 Structural drawing of second three-neck valve of dispenser of embodiment 1 State diagram when the handle is pulled up in the second three-neck valve Schematic showing the structure of the dispenser in Example 2. FIG. Schematic of the structure of the dispenser in Example 3 Schematic showing the structure of the dispenser of Example 4. FIG. Hardware configuration diagram of automatic switchgear in embodiment 5 The flowchart showing the flow of the heat sterilization process performed by the automatic opening / closing apparatus of Example 5 Path diagram of drinking water in the heat sterilization method of Example 9 The figure of the water injection valve vicinity when releasing a valve | bulb after attaching "pipe" to a dispenser in Example 9, and circulating drinking water

Hereinafter, the first invention described in claim 1 will be described using the first embodiment.

A first invention is a dispenser having a cold water piping system for supplying chilled drinking water and a hot water piping system for supplying warm drinking water, and both the piping systems have three ports. The present invention relates to a dispenser connected to one water inlet by a three-neck valve that is a valve having This dispenser is sterilized by passing drinking water between a cold water piping system and a hot water piping system using a three-neck valve and circulating hot water in both piping systems using the convection phenomenon caused by the temperature difference of the water. It is characterized by performing processing.

FIG. 1 is a route diagram showing a route of drinking water when a user pours out drinking water cooled by the dispenser of the first embodiment.

First, the structure of the dispenser of Example 1 will be described with reference to FIG. The dispenser of Example 1 has a water intake 0101, a cold water piping system 0102, a hot water piping system 0103, a three-neck valve 0104, and a water injection port 0105. The cold water piping system includes a cold water tank 0106 in the piping system, and the cold water tank includes a cooler 0107. The hot water piping system has a hot water tank 0108 in the piping system, and the hot water tank has a heating device 0109. A drinking water container 0110 is connected to the water intake of the dispenser.

Drinking water in the drinking water container flows into the cold water piping system from the intake. Drinking water is stored in a cold water tank, during which time it is cooled by a cooler. Chilled drinking water (hereinafter referred to as “cold water”) flows from the cold water piping system to the water inlet through the three-way valve, and the cold water 0111 is poured into the cup 0112. The three-neck valve has three ports, and any two of them can be selected and passed through, but here, the mouth connected to the cold water piping system and the water inlet The connected mouth is selected.

FIG. 2 is a route diagram showing the route of drinking water when the user pours the drinking water warmed by the dispenser of the first embodiment. Drinking water in the drinking water container 0201 flows into the hot water piping system 0203 from the water intake 0202. Drinking water is stored in the hot water tank 0204 and heated by the heating device 0205 during that time. Warmed drinking water (hereinafter referred to as “warm water”) flows from the hot water piping system to the water inlet 0207 via the three-way valve 0206, and the hot water 0208 is poured into the cup 0209. Here, the port connected to the hot water piping system and the port connected to the water injection port are selected from the three ports of the three-neck valve.

FIG. 3 is a circulation route diagram showing a circulation route of drinking water when hot water is circulated by the convection phenomenon in the dispenser of Example 1 to heat sterilize the piping system. In the three-neck valve 0301, the port connected to the cold water piping system 0302 and the port connected to the hot water piping system 0303 are selected. In this case, the specific gravity of the hot water in the hot water tank 0304 is lighter than that of the cold water in the cold water tank 0305 due to thermal expansion. The warm water with a low specific gravity rises, while the cold water with a high specific gravity descends, whereby the circulation of drinking water begins in the piping system. This is called a convection phenomenon. The hot water in the hot water tank reaches the water intake 0307 via the hot water piping system 0306 at the upper part of the hot water tank, and further flows into the cold water tank through the cold water piping system 0308 at the upper part of the cold water tank. On the other hand, the cold water in the cold water tank reaches the three-way valve through the cold water piping system at the lower part of the cold water tank, and further flows into the hot water tank through the hot water pipe system at the lower part of the hot water tank. By circulating hot water due to such a convection phenomenon, the entire piping system including the cold water piping system is subjected to heat sterilization. The water injection port 0309 is not included in the circulation path due to the convection phenomenon. However, when hot water is injected, it is always subjected to heat sterilization treatment, so that there is little risk of propagation of germs.

FIG. 4 is a route diagram of drinking water when the dispensing of the drinking water and the heat sterilization using the convection phenomenon are not performed in the dispenser of the first embodiment. Here, none of the three mouths of the three-neck valve 0401 is selected, and there is no drinking water dispensing or drinking water circulation.

Hereinafter, each component of the first invention will be described in detail.

A first invention has a water intake port for taking drinking water, a three-way valve that has three ports, selects any two of the three ports, and allows drinking water to pass between them, and three of the three-port valves. A piping system connected to one of the two mouths, through which drinking water passes between a water inlet for pouring drinking water, and one of the two inlets where the intake port and the three-way valve remain. A piping system for cold water, which is a piping system having a cooling water tank equipped with a cooler in the system, and a piping system through which drinking water passes between the intake port and the remaining one port of the three-way valve, The present invention relates to a dispenser having a hot water piping system that is a piping system having a hot water tank provided with a heating device in the piping system.

“Dispenser” generally refers to a liquid dispensing apparatus that dispenses liquid accurately and accurately, but here, it refers to an apparatus that supplies drinking water among such devices.

“Drinking water” refers to water used for drinking. Typically, it refers to mineral water packed in a container using groundwater as raw water, but includes water that does not use groundwater as raw water and water supplied by water.

The supply source of drinking water is typically a plastic drinking water container filled with drinking water. Such drinking water containers are often removably connected to the top of the dispenser so that they can be easily replaced when the drinking water inside is exhausted. The source of drinking water may be water.

The “water intake for drinking water” is an intake for taking drinking water from the drinking water supply source into the dispenser. When the drinking water supply source is a drinking water container, the joint between the drinking water container and the dispenser serves as a water intake. In a typical drinking water container, the inside of the drinking water container is directed downward and the drinking water inside is poured out by gravity. Usually, such a drinking water container has only one mouth and the container is rigid. Since it is made of resin and its shape does not change, drinking water does not come out unless air enters the inside from the outlet. On the contrary, many dispensers are replenished from the drinking water container by the amount used using this mechanism.

FIG. 5 is a cross-sectional structure diagram around the water intake in such a dispenser. A drinking water container 0502 filled with drinking water 0501 is installed on the upper part of the dispenser main body 0503. Although not shown in the figure, the mouth of the drinking water container is provided with a valve that prevents water from spilling when the drinking water container is placed upside down and installed in the dispenser. There are many things that open automatically. As shown in the figure, the drinking water container is installed with a slight gap between it and the water intake 0504. The intake port has a dish-like shape, and there is an edge so that drinking water does not spill out at the periphery, and the height of the edge is higher than the mouth of the drinking water container. The shaded portion in the figure indicates drinking water. The mouth of the drinking water container is submerged in the drinking water accumulated in the water intake, and the outside air cannot enter the drinking water container. Therefore, the drinking water cannot stay in the drinking water container and fall off. When the drinking water is poured out from the water inlet and the drinking water accumulated in the water inlet flows out into the cold water piping system 0505 or the hot water piping system 0506, the surface of the drinking water on the water inlet is lowered. When the mouth of the drinking water container touches the outside air due to a drop in the water level, the outside air enters the inside of the drinking water container, and the drinking water falls from the drinking water container until the mouth of the drinking water container is submerged in the surface of the drinking water above the intake port. To do. In this way, the joint between the water intake and the drinking water supply source is not necessarily physically connected.

When the hot water is circulated using the convection phenomenon in the dispenser using the water intake shown in FIG. 5, the hot water flows into the water intake through the hot water piping system, and moves to the cold water piping system after moving inside the dish-shaped water intake. It will be leaked. In FIG. 5, the drinking water inside the drinking water container is connected to the drinking water inside the water intake. This is because the water pressure due to the weight of the water inside the drinking water container is used for dispensing drinking water. For this reason, some of the circulating hot water may enter the drinking water container. In order to prevent the intrusion of hot water and increase the efficiency of heat sterilization, provide a valve to cover the mouth of the drinking water container during the heat sterilization process, or connect the hot water piping system at the water intake and the place for cold water The place where the piping system is connected is made close, and conversely, the mouth of the drinking water container can be separated.

When the source of drinking water is water, the portion where the hot water piping system and the cold water piping system are directly connected to the water pipe is the water intake. When the drinking water supply source is a drinking water container made of soft resin, the water intake may be directly connected or may be connected with a gap as in FIG.

"Three-neck valve" is a valve that has "three ports, and can select any two of the three ports and allow drinking water to pass between them." The function of the three-way valve has already been described with reference to FIGS. The form of FIGS. 1 to 3 corresponds to the case of “selecting any two of the three mouths and allowing drinking water to pass between them”. “Having three mouths, and selecting any two of the three mouths and allowing drinking water to pass between them” means that water does not pass between any of the three mouths as shown in FIG. It is not intended to exclude the use of. Hereinafter, two examples of the three-way valve will be described.

FIG. 6 is a structural diagram of the first three-way valve in the dispenser of the first embodiment. The first three-neck valve has a rotatable ball 0602 inside a main body 0601 whose outside is cylindrical and whose inside is hollowed out into a spherical shape. The lower figure is a view of the main body with the bottom surface of the cylinder facing downward, and the upper figure is a cross-sectional view taken along the dashed line in the lower figure. Three holes are formed in the main body such that the center of the main body cylinder including the center point of the inner ball and the center of the main cylinder have an angle of 120 degrees on a horizontal plane. On the other hand, two holes having an angle of 120 degrees on the same plane are formed in the ball surface, and they are connected to each other by a water passage 0603. In addition, a shaft 0604 is mounted on the upper portion of the ball in a direction perpendicular to the plane, and when the shaft is rotated, the ball inside is also rotated. A handle 0605 is attached to the tip of the shaft. The spherical surface where the ball and the main body contact is in close contact so that drinking water does not leak out.

In FIG. 6, the port 0606 to which the cold water piping system is connected and the port 0607 to which the water injection port is connected are connected by a water passage, and cold water is poured out from the water injection port. When the shaft is rotated 60 degrees clockwise from this state, the three mouths are blocked by the outer surface of the ball and the flow of drinking water stops. When drinking water is not dispensed from the dispenser and heat sterilization is not performed, the water passage of the ball is held at this position (hereinafter, this position where the flow of drinking water is stopped is the normal position when the dispenser is not used). Called "reference position"). Then, when the ball axis is further rotated 60 degrees clockwise from the reference position, the mouth connected to the water inlet and the mouth 0608 connected to the hot water piping system are connected by the water passage and hot water is poured from the water inlet. It will be. Further, when the ball shaft is rotated 180 degrees clockwise or counterclockwise from the reference position, the mouth connected to the cold water piping system and the mouth connected to the hot water piping system are connected to start the circulation of drinking water.

FIG. 7 is a structural diagram of the second three-neck valve of the dispenser of the first embodiment. When starting the heat sterilization process, the first three-neck valve needs to rotate the axis of the ball 180 degrees clockwise or counterclockwise from the reference position. In the middle of the rotation, the port connected to the water injection port is connected to the port connected to the cold water piping system or the hot water piping system, and water leaks unnecessarily from the water injection port. The second three-neck valve is an improvement on this.

The second three-way valve is composed of a cylindrical main body 0701, a piston-like valve 0702, a shaft 0703, and a handle 0704. The cylindrical body has a cylindrical outer shape. Three mouths having an angle of 120 degrees with each other on the same plane parallel to the bottom surface of the cylinder are provided on the cylindrical side surface of the cylindrical body. The lower view of FIG. 7 is a longitudinal sectional view of the second three-neck valve in a plane including the center line of the cylinder and the center point of the mouth connected to the water inlet. The upper view of FIG. 7 is a transverse cross-sectional view of the second three-neck valve in a plane parallel to the bottom surface of the cylinder indicated by a dashed line in the lower view. The cylindrical main body has a cylindrical cavity inside, and a cylindrical piston-like valve is accommodated in the cavity. The cylindrical side wall of the piston-like valve is in close contact with the hollow inner wall of the cylinder-shaped body, and water cannot enter the contact surface. The height of the cylinder of the piston-like valve is lower than the height of the cavity inside the cylinder-like body, and the piston-like valve can move up and down. Air holes 0705 are provided in the ceiling portion and the floor portion of the cylindrical body so that the air inside does not get in the way when the piston-like valve moves up and down. The piston-shaped valve has an angle of 120 degrees from the center line of the cylinder so that two of the three ports provided in the cylindrical body can be selected and passed through in a state where the piston-shaped valve is disposed at the lowest part of the cavity in the cylindrical body. It has a first water passage 0706 connected by two holes. In addition, the piston-like valve is arranged between the mouth connected to the cold water piping system and the mouth connected to the hot water piping system provided in the cylindrical body in the state where it is arranged at the top of the cavity in the cylindrical body. A second water passage 0707 is connected by two holes having an angle of 120 degrees from the center line of the cylinder so that water can pass. As shown in the upper figure, the two water passages are formed at point-symmetric positions around the center of the cylinder in the plan view. The two water passages are connected to each other inside the piston-like valve by a communication hole 0710. This is for preventing miscellaneous bacteria from propagating in the drinking water staying in the second water passage when the heat sterilization treatment is not performed over a long period of time.

The shaft is fixed on the center line of the cylinder at the upper part of the piston-like valve, and the shaft protrudes to the outside through a hole opened in the center of the ceiling of the cylindrical body. A handle is fixed to the tip of the shaft. By rotating the handle clockwise or counterclockwise, the piston-like valve can be rotated inside the cylindrical body. Further, the piston-like valve moves up and down within the cylinder-shaped body by moving the handle up and down.

7 The position of the piston-like valve in FIG. When the shaft is rotated 60 degrees clockwise or counterclockwise from the reference position, cold water or hot water can be poured out. Also, drinking water can be circulated by lifting the piston-shaped valve upward without rotating the shaft from the reference position. A claw 0708 is attached to the inner wall of the cylinder-shaped main body, and a groove 0709 is vertically provided along the outer wall of the piston-like valve. The pawl and groove prevent the shaft from lifting up at an angle different from the reference position. FIG. 8 is a state diagram when the handle is pulled up in the second three-neck valve. The port connected to the cold water piping system by lifting the piston-like valve 0801 and the port connected to the hot water piping system (not shown in the figure for sectional view) are connected by the second water passage 0802. It represents the state being done. In this state, the drinking water begins to circulate inside the dispenser. A claw 0803 provided on the hollow inner wall of the cylinder-shaped main body is accommodated in a groove 0804 dug in the piston-like valve.

The two three-way valves described with reference to FIGS. 6 to 8 are only examples of means for realizing the functions of the three-way valve described with reference to FIGS. The core of the present invention is that it is possible to perform simple heat sterilization using the natural law of convection phenomenon by applying to the dispenser a three-neck valve that has a function of allowing drinking water to pass through by selecting any one from three mouths. It is in the point which found out. Therefore, it is not an essential problem what kind of structure the function of the three-way valve as described above is realized, and it is not possible to realize the function of the three-way valve similar to the above with a structure different from the above example. It is easy for those skilled in the art. Therefore, any valve having the above function may be the three-way valve of the present invention.

“Water inlet” is “connected to one of the three mouths of the three-way valve to pour drinking water.” The water inlet merely pours out the drinking water coming out of one mouth of the three-way valve. Since it is a thing, the thing about a short pipe | tube is sufficient and may be comprised integrally with the three-neck valve.

The “cold water pipe system” is a “pipe system through which drinking water passes between the intake port and one of the remaining two ports of the three-way valve, and includes a cooler in the pipe system. A piping system with a tank. "

As already described with reference to FIG. 1, the cold water piping system has one end connected to the intake port and the other end connected to one port of the three-way valve. Similarly, one end of the hot water piping system is connected to the intake port, and the other end is connected to the other port of the three-way valve. Therefore, the cold water piping system is connected to the hot water piping system in addition to the drinking water supply source at one end via the intake port, and at the other end to the water inlet port via the three-neck valve. It is also connected to a hot water piping system. That is, the cold water piping system and the hot water piping system are connected in an annular shape via the water intake and the three-way valve. And the heat sterilization process using a convection phenomenon is performed using the piping system of such an annular structure.

“Cold water tank” is a container for storing cold water. The cold water tank shown in FIGS. 1 to 4 is hermetically sealed, and pipes are connected to the upper and lower parts thereof. However, the cold water tank is not necessarily sealed. An open top may be used like a pan without a lid. That is, if the drinking water does not fall more than necessary using the same principle as that used at the water intake, the drinking water does not overflow from the cold water tank. Moreover, even if it takes such a structure, it will not become the hindrance for circulating drinking water. The same applies to the “warm water tank” of the “warm water piping system”.

The chilled water piping system has a chilled water tank “in the piping system”, but there is no need for a piping between the chilled water tank and the intake port or between the chilled water tank and the three-way valve. The cold water tank and the water intake may be directly connected, or the cold water tank and the three-way valve may be directly connected. The same applies to the hot water tank of the hot water piping system.

“Cooler” is a device for cooling drinking water. A typical cooler sends out the refrigerant compressed by the compressor to the radiator, dissipates the heat in the radiator, then depressurizes it with an expansion valve, and cools it by removing the evaporation heat from the surroundings with a vaporizer. Is. The radiator is attached to the back side of the dispenser main body so as to be in contact with the outside air, and a drinking water cooling in the cold water tank is realized by winding a thin tubular vaporizer around the cold water tank. However, from the essence of the present invention, it is not required that a part or all of the cooler is structurally integrated with the cold water tank. For example, drinking water cooled in a cooling device installed outside the cold water tank. A configuration in which the water is stored in the cold water tank is also included in the “cold water tank equipped with a cooler”.

¡The cooler should have a power switch that can turn the cooling function on and off. That is, when performing heat sterilization using the convection phenomenon, it is desirable to stop the cooler manually or automatically during that time in order to heat the entire piping system as necessary and sufficient. As an optimal example of operating the power switch of the cooler, a switch is attached to the shaft of the three-way valve so that the power switch is turned off when the valve is operated so that hot water circulates in the piping system. do it.

The “hot water piping system” is “a piping system through which drinking water passes between the intake port and the remaining one port of the three-way valve, and has a hot water tank equipped with a heating device in the piping system. It is a piping system. "

The “warm water tank” is a container for storing warm water.

”The“ heating device ”is installed in the hot water tank and heats the drinking water in the hot water tank. Typically, this is realized by winding a heating wire around the outer periphery of the hot water tank and flowing electricity through the heating wire. Also in this case, like the cooler in the cold water tank, it is not required that a part or all of the heating device and the hot water tank are structurally integrated. The “hot water tank equipped with the heating device” This includes the case where hot water heated by a heating device installed at a location apart from the tank is stored in the hot water tank.

In FIG. 1 to FIG. 4, the hot water tank and the cold water tank are drawn at the same height, but it is not limited to the same height.

As described above, the dispenser of Example 1 can easily sterilize the piping system simply by operating the three-way valve. In the dispenser of Document 1, a new pipe equipped with a circulation pump for installing a heater such as a heating wire around the pipe, further installing a heater in addition to the cooling device in the cold water tank, or circulating hot water. It was necessary to establish a system. These are unnecessary to perform the normal function of the dispenser, and are a heavy burden in manufacturing and maintenance. On the other hand, the dispenser of Example 1 enabled the heat sterilization process with a very simple structure in which a three-neck valve was additionally used. In addition, by using the pouring outlet also as cold water / hot water, it is possible to heat sterilize the pouring outlet for cold water that is most prone to breeding germs. As described above, the dispenser of Example 1 is a dispenser that has a simple structure, has a small manufacturing / maintenance burden, and can sterilize all parts including the water inlet without fail.

Hereinafter, the second invention described in claim 1 will be described using the second embodiment.

A second invention is a dispenser characterized in that the hot water is circulated by utilizing the convection phenomenon caused by the temperature difference of the water to sterilize the piping system. The dispenser is dedicated for cold water and hot water respectively. The present invention relates to a dispenser having another feature of having a discharge valve and having a new piping system for opening the valve and circulating hot water.

FIG. 9 is a schematic view showing the structure of the dispenser in the second embodiment. The dispenser of Example 2 has a water intake 0901, a cold water extraction valve 0902, a hot water extraction valve 0903, a cold water piping system 0904, a hot water piping system 0905, and a circulation piping system 0906. The cold water piping system has a cold water tank 0907, and the cold water tank is provided with a cooler 0908. The hot water piping system has a hot water tank 0909, and the hot water tank is provided with a heating device 0910. The circulation piping system has an on-off valve 0911. A drinking water container 0912 is connected to the water intake.

The path through which drinking water flows in the dispenser of Example 2 will be described with reference to FIG. The on-off valve is closed when heat sterilization is not performed. When the user dispenses cold water, the cold water dispensing valve is opened. The drinking water inside the drinking water container flows into the cold water tank through the water intake and the cold water piping path and is stored. Drinking water cooled in the cold water tank is poured out from the cold water dispensing valve through the cold water piping system at the bottom of the cold water tank. When the user pours hot water, the hot water pour valve is opened. The drinking water inside the drinking water container flows into the hot water tank through the water intake and the hot water piping path and is stored. Drinking water heated in the hot water tank is discharged from the hot water discharge valve through the hot water piping system at the lower part of the hot water tank.

ときには When performing heat sterilization using the convection phenomenon, open the on-off valve in the circulation piping system. During this time, the cold water pouring valve and the hot water pouring valve are closed. The hot water in the hot water tank reaches the intake through the hot water piping system at the upper part of the hot water tank, and further flows into the cold water tank through the cold water piping system at the upper part of the cold water tank. On the other hand, the chilled water in the chilled water tank flows through the chilled water piping system at the lower part of the chilled water tank, the circulating piping system on the left side of the on-off valve, the on-off valve, the circulating piping system on the right side of the on-off valve, and the hot water piping system at the lower part of the hot water tank. Reach the tank.

In the following, each component of the second invention will be described in detail.

The second invention includes a water intake port for taking drinking water, a cold water pouring valve for pouring cooled drinking water, a hot water pouring valve for pouring heated drinking water, the water intake port and the cold water pouring valve. A piping system through which drinking water passes between the outlet valve and a piping system for chilled water having a chilled water tank equipped with a cooler in the piping system, the intake port and the hot water dispensing valve A piping system through which drinking water passes, and a piping system for hot water that has a hot water tank provided with a heating device in the piping system, and the cold water dispensing valve of the piping system for cold water A piping system through which drinking water passes between a side end and the hot water dispensing valve side end of the hot water piping system, and a circulation having an opening / closing valve for opening and closing water flow in the piping system With a piping system Capacitors, on.

“Intake” is the same as that in the first invention.

“Cold water pouring valve” is a water pouring port for pouring cold water with a valve that opens and closes.

“Hot water pouring valve” is a water pouring port for pouring hot water equipped with a valve for opening and closing.

Unlike the first embodiment, the “cold water piping system” is connected not to the three-neck valve but to the cold water pouring valve, and is also connected to the circulation piping system in the vicinity of the cold water pouring valve connecting portion. . The other points are the same as the cold water piping system of the first embodiment.

The “hot water piping system” is different from that of the first embodiment, and one is connected to the hot water pouring valve instead of the three-neck valve, and is further connected to the circulation piping system in the vicinity of the hot water pouring valve connecting portion. . The other points are the same as the hot water piping system of the first embodiment.

The “circulation piping system” is a piping system through which drinking water passes between the cold water extraction valve side end of the cold water piping system and the hot water extraction valve side end of the hot water piping system. The piping system has an on-off valve for opening and closing water. ”One end of the circulation piping system is connected to the chilled water piping system in the vicinity of the chilled water discharge valve, and the other end is connected to hot water. It is connected in the vicinity of the piping system for hot water and the hot water extraction valve. It is desirable that these connecting portions be as close to the dispensing valve as possible. This is to reduce the number of places where hot water does not reach when hot water circulates due to convection.

“Open / close valve” is a valve that opens and closes water flow. The opening and closing may be performed manually or an electromagnetic valve using electromagnetic force may be used.

In FIG. 9, the hot water tank and the cold water tank are drawn at the same height, but it is not intended to be limited to the same height.

As described above, the dispenser of Example 2 can easily perform heat sterilization of the piping system only by operating the on-off valve. In the dispenser of the literature 1, a piping system equipped with a circulation pump for mounting a heater such as a heating wire around the piping, further installing a heater in addition to a cooling device in a cold water tank, or circulating hot water. It was necessary to provide it. These are unnecessary to perform the normal function of the dispenser, and are a heavy burden in manufacturing and maintenance. On the other hand, the dispenser of Example 2 enabled the heat sterilization process with a simple structure that additionally uses a piping system provided with an on-off valve.

Hereinafter, the third invention described in claim 3 will be described using the third embodiment.

A third invention is a dispenser characterized in that a hot water is circulated using a convection phenomenon caused by a temperature difference of water to sterilize a piping system, and includes a single selective dispensing valve, And a new piping system for circulating hot water by opening the valve.

FIG. 10 is a schematic diagram of the structure of the dispenser in the third embodiment. The dispenser of the third embodiment has a water intake 1001, a selective dispensing valve 1002, a cold water piping system 1003, a hot water piping system 1004, and a circulation piping system 1005. The cold water piping system has a cold water tank 1006, and the cold water tank is provided with a cooler 1007. The hot water piping system has a hot water tank 1008, and the hot water tank is provided with a heating device 1009. The circulation piping system has an on-off valve 1010. A drinking water container 1011 is connected to the water intake.

A path through which drinking water flows in the dispenser of Example 3 will be described with reference to FIG. The on-off valve is closed when heat sterilization is not performed. When the user pours cold water, the valve on the chilled water piping system side is opened with the selective dispensing valve. The drinking water inside the drinking water container flows into the cold water tank through the water intake and the cold water piping path and is stored. The drinking water cooled in the cold water tank is discharged from the selective dispensing valve through the cold water piping system at the lower part of the cold water tank. When the user pours hot water, the valve on the hot water piping system side is opened with a selective dispensing valve. The drinking water inside the drinking water container flows into the hot water tank through the water intake and the hot water piping path and is stored. Drinking water heated in the hot water tank is poured out from the selective dispensing valve through the hot water piping system at the lower part of the hot water tank.

ときには When performing heat sterilization using the convection phenomenon, open the on-off valve in the circulation piping system. During this time, the selective dispensing valve is closed. The hot water in the hot water tank reaches the intake through the hot water piping system at the upper part of the hot water tank, and further flows into the cold water tank through the cold water piping system at the upper part of the cold water tank. On the other hand, the chilled water in the chilled water tank flows through the chilled water piping system at the lower part of the chilled water tank, the circulating piping system on the left side of the on-off valve, the on-off valve, the circulating piping system on the right side of the on-off valve, and the hot water piping system at the lower part of the hot water tank. Reach the tank.

Hereinafter, each component of the third invention will be described in detail.

3rd invention has the intake port which takes in drinking water, and two intakes, The selection type | formula extraction valve which selects one out of two intake ports, takes in drinking water, and injects from a spout And a piping system through which drinking water passes between the intake port and one of the two intake ports of the selective dispensing valve, the piping system having a cold water tank equipped with a cooler in the piping system A piping system through which drinking water passes between the cold water piping system and the intake port and the remaining inlet of the selective dispensing valve, and a hot water tank equipped with a heating device in the piping system. Drinking water passes between the hot water piping system, which is a piping system, and the selective dispensing valve side end of the cold water piping system, and the selective dispensing valve side end of the hot water piping system. A piping system with water flow through the piping system. Dispenser and a circulation piping system having an on-off valve for performing closed relates.

“Intake” is the same as that in the first invention.

“Selective dispensing valve” has “two intakes, choose one of the two intakes to take drinking water and pour it from the spout.” Such a valve can supply cold and hot water. It is widely used as a water tap that is selectively dispensed.

Unlike the first embodiment, the “cold water piping system” is connected not to a three-way valve but to a selective dispensing valve, and is also connected to a circulation piping system in the vicinity of the selective dispensing valve connection portion. . The other points are the same as the cold water piping system of the first embodiment.

The “hot water piping system” is different from that of the first embodiment, and one of them is connected to the selective dispensing valve instead of the three-neck valve, and is further connected to the circulation piping system in the vicinity of the selective dispensing valve connecting portion. . The other points are the same as the hot water piping system of the first embodiment.

The “circulation piping system” is “a piping system through which potable water passes between the end of the selective extraction valve side of the cold water piping system and the end of the selective extraction valve side of the hot water piping system”. And having an on-off valve for opening and closing water flow in the piping system. ”One end of the circulation piping system is connected to the cold water piping system in the vicinity of the selective dispensing valve, and the other The end is connected to the hot water piping system in the vicinity of the selective dispensing valve. These connections are preferably as close to the selective dispensing valve as possible. This is to reduce the number of places where hot water does not reach when hot water circulates due to convection.

“Open / close valve” is the same as the open / close valve of the second embodiment. The selective dispensing valve and the on-off valve may be integrally formed. In that case, the passage connecting the selective dispensing valve and the on-off valve inside the one formed integrally is regarded as a part of the cold water piping system or the hot water piping system.

In FIG. 10, the hot water tank and the cold water tank are drawn at the same height, but it is not intended to be limited to the same height.

As described above, the dispenser of Example 3 can easily sterilize the piping system simply by operating the on-off valve. The dispenser of Example 3 enabled the heat sterilization process with a very simple structure in which a circulation piping system was additionally used. The dispenser according to the third embodiment is a dispenser with a light burden both in manufacturing and maintenance. In addition, by using the pouring outlet also as cold water / hot water, it is possible to heat sterilize the pouring outlet for cold water that is most prone to breeding germs.

Hereinafter, the fourth invention described in claim 4 will be described using a fourth embodiment. The fourth invention relates to the fourth invention in which the first to third inventions are the higher inventions, and the fourth embodiment is the first invention of which the first invention is the highest.

The fourth invention is a dispenser according to one invention of the first to third inventions, wherein the hot water tank is disposed below the cold water tank, so that the heat sterilization treatment utilizing the convection phenomenon is more efficiently performed. It relates to a dispenser that can be implemented.

FIG. 11 is a schematic diagram illustrating the configuration of the dispenser of the fourth embodiment. The hot water tank in the dispenser of the fourth embodiment is different from the first embodiment only in that the hot water tank is arranged directly below the cold water tank, and the components and their connection relation are the same as in the first embodiment.

The configuration requirements newly added in the fourth invention will be described.

The fourth invention is characterized in that the cold water tank and the hot water tank are installed so that the center of gravity of the drinking water in the cold water tank is higher than the center of gravity of the drinking water in the hot water tank. The dispenser according to 1 to 3.

"The center of gravity" is the point that becomes the center when a substance with mass is distributed, and is the point where the mass balances.

“To be above” means that the altitude is high, and it is not necessarily right above, but may be diagonally above.

The dispenser in the fourth invention can circulate hot water more efficiently by disposing the hot water tank below the cold water tank. That is, at the point of time when the heat sterilization process is started, there is a large difference in altitude between drinking water that has been warmed and lightened in the hot water tank and drinking water that has been cooled and heavy in the cold water tank. Begins.

Hereinafter, the fifth invention described in claim 5 will be described using a fifth embodiment.

The fifth invention relates to a dispenser according to the first invention, which can automatically perform a heat sterilization process utilizing a convection phenomenon.

The fifth invention is an automatic opening / closing operation that automatically opens and closes between a port connected to the cold water piping system and a port connected to the hot water piping system among the three ports of the three-way valve according to a predetermined condition. A dispenser according to claim 1, comprising a device.

FIG. 12 is a hardware configuration diagram of the automatic switchgear according to the fifth embodiment. The automatic opening / closing device is connected to the three-way valve 1201, detects the open / closed state of the valve, and opens / closes the drive detection unit 1202, and supplies a power to the drive detection unit and controls the drive detection unit 1203 electronically. A command unit 1204 that gives a command to the control unit according to a predetermined condition, and a condition acquisition unit 1205 that acquires the predetermined condition. A servo motor is generally used for the drive detection unit. The command unit manages a CPU 1206 for performing various arithmetic processes, an external storage device 1207 such as a ROM for holding programs and data, a memory 1208 for temporarily storing and holding programs and data, and for managing time. Timer 1209. The command unit also includes a communication interface 1210 for communicating with the control unit and the condition acquisition unit. These are connected to each other by a system bus 1211 which is a data communication path, and performs transmission / reception and processing of information. The program held in the external storage device is read into the memory as necessary, and the CPU executes various arithmetic processes by referring to the program in the memory. A program is a series of command statements for operating hardware including a CPU to perform various arithmetic processes and search processes. In addition, a plurality of addresses are assigned to each memory, and in the arithmetic processing of the CPU, it is possible to perform arithmetic processing using data by specifying the address and accessing the stored data. It has become. Such control using a servo mechanism including a drive detection unit, a control unit, and a command unit is widely known to those skilled in the art.

“Predetermined conditions” refer to conditions for performing heat sterilization of the dispenser using the convection phenomenon, and relate to the time to open the valve and the time from opening to closing. The condition acquisition unit accepts input of these conditions. Typically, this is an input terminal composed of a small liquid crystal screen and several input buttons, and inputs time and the like while operating the buttons in accordance with a cursor moving on the liquid crystal screen. Such electronic components are widely applied in various home appliances and can be easily implemented by those skilled in the art.

FIG. 13 is a flowchart showing the flow of the heat sterilization process performed by the automatic opening / closing device of the fifth embodiment. In this paragraph, “the valve is open” means that, among the three ports of the three-way valve, water can pass between the port connected to the cold water piping system and the port connected to the hot water piping system. Good, otherwise it is closed. First, the condition acquisition unit acquires a predetermined condition including the heat sterilization processing start time and the processing time (step S1301). The headquarters records it in the external storage device (step S1302). The headquarters constantly monitors the arrival of the heat sterilization treatment start time by comparing the heat sterilization treatment start time read from the external storage device with the current time acquired from the timer (step S1303). The command unit instructs the control unit to open the three-neck valve when the heat sterilization processing start time arrives (step S1304). The control unit controls the drive detection unit to open the valve (step S1305). Next, the command unit constantly monitors whether the time actually elapsed from the start of the heat sterilization process has reached the processing time read from the external storage device (step S1306). When the command unit determines that the processing time has elapsed, the command unit instructs the control unit to close the valve (step S1307). The control unit controls the drive detection unit to close the valve (step S1308). Here, it is assumed that the dispenser is already in use and the hot water in the hot water tank is in a heated state. Further, while the heat sterilization process is being performed, it is desirable to stop the cooler. However, in Example 5, when the three-neck valve is closed, the cooling by the cooler is automatically performed by a switch mounted on the three-neck valve shaft. The above procedure was not included in the above procedure.

By incorporating devices such as a CPU and timer in this way, automatic operation of heat sterilization by appointment can be performed.

Hereinafter, the sixth invention described in claim 6 will be described using the sixth embodiment.

The sixth invention relates to a dispenser according to the second or third invention, which can automatically perform a heat sterilization process utilizing a convection phenomenon.

The sixth invention relates to the dispenser according to claim 2 or 3, further comprising an automatic opening / closing device that automatically opens and closes the opening / closing valve according to a predetermined condition.

The automatic opening / closing device of Example 6 is the same as that of Example 5. However, the object operated by the automatic opening / closing device of the sixth embodiment is not a three-way valve but an opening / closing valve. Since the hardware configuration of the automatic opening / closing device of the sixth embodiment and the execution procedure of the heat sterilization process are the same as those of the fifth embodiment, the description thereof is omitted.

Hereinafter, the seventh invention described in claim 7 will be described using a seventh embodiment.

The seventh invention relates to a dispenser according to the first to third inventions, characterized in that hot water is forcibly circulated using a circulation pump instead of using a convection phenomenon.

The seventh invention relates to the dispenser according to any one of claims 1 to 3, wherein a circulation pump is provided in the piping system.

In the seventh invention subordinate to the first invention, the “piping system” refers to the cold water piping system and the hot water piping system in the seventh invention subordinate to the second or third invention. Refers to a cold water piping system, a hot water piping system, and a circulation piping system. The “circulation pump” is a pump for forcibly circulating drinking water during heat sterilization treatment with hot water. The circulation pump is started and stopped by a power switch. The power switch is mounted on the three-way valve in the seventh invention subordinate to the first invention, or on the on-off valve in the seventh invention subordinate to the second or third invention. The circulation pump may be started and stopped in accordance with the opening and closing of the valve.

In the seventh invention subordinate to the second or third invention, the installation location of the circulation pump is preferably in the circulation piping system. This is to prevent the circulation pump from interfering with the flow of drinking water when pouring out cold water or hot water. In the seventh invention subordinate to the first invention, the circulation pump is attached to either the cold water piping system or the hot water piping system. Use a pump that does not become necessary.

The dispenser of the seventh invention has a slightly more complicated structure than the dispenser of the first to third inventions, but can shorten the heat sterilization time by forced circulation of hot water.

Hereinafter, the eighth invention according to claim 8 will be described using the eighth embodiment.

The eighth invention relates to the dispenser according to the fifth or sixth invention, wherein automatic heat sterilization is performed by forced circulation of hot water by a circulation pump.

The eighth invention relates to the dispenser according to claim 5 or 6, wherein the piping system has a circulation pump, and the automatic opening / closing device controls the circulation pump.

The control unit in the automatic switching device controls the drive detection unit and the circulation pump at the same time. That is, the valve is released and the circulation pump is started, and the valve is closed and the circulation pump is stopped.

The dispenser of the eighth invention has a slightly more complicated structure than the dispenser of the fifth or sixth invention, but can shorten the heat sterilization time by forced circulation of hot water.

Hereinafter, the ninth aspect of the present invention will be described using the ninth embodiment.

The ninth invention relates to a heat sterilization method in which both valves are connected by piping in a dispenser having a cold water pouring valve and a hot water pouring valve.

The ninth invention includes a water intake port for taking drinking water, a cold water extraction valve for extracting cooled drinking water, a hot water extraction valve for extracting heated drinking water, the intake port and the cold water injection. Drinking water between a cold water piping system, which is a piping system through which drinking water passes between the outlet valve and a piping system having a cold water tank in the piping system, and the hot water outlet valve Is a piping system through which a dispenser having a hot water piping system, which is a piping system having a hot water tank equipped with a heating device in the piping system, the drinking water in the hot water tank being A first step of heating by a heating device; a second step of connecting the cold water pouring valve and the hot water pouring valve by piping; and a third step of opening both the cold water pouring valve and the hot water pouring valve. Dispenser heat sterilization method comprising the step, on.

FIG. 14 is a route diagram of drinking water in the heat sterilization method of Example 9. The dispenser capable of being heat sterilized by the heat sterilization method in Example 9 is the same as the dispenser of Example 2 except that it does not have a circulation piping system and does not necessarily have a cooler. In other words, each has a dedicated dispensing valve for cold water dispensing and hot water dispensing. The structure of such a dispenser is very common. In FIG. 14, the mouth of the dispenser cold water dispensing valve 1401 and the mouth of the hot water dispensing valve 1402 are relayed by a detachable pipe 1403.

FIG. 15 is a view of the vicinity of the water injection valve when the “removable pipe” is attached to the dispenser in Example 9 and the valve is released to circulate drinking water. In the first step, the drinking water in the hot water tank is first warmed by the heating device. This step is started by a method such as connecting the power cord of the dispenser to an outlet or turning on the power switch of the dispenser. Next, in the second step, the cold water extraction valve 1501 and the hot water extraction valve 1502 are connected by piping. “Piping” is here a rubber hose 1503. As the rubber hose, it is preferable to select a rubber hose whose inner diameter is slightly smaller than the outer diameter of the water inlet so that drinking water does not leak from the connection portion. Finally, in the third step, both the cold water pouring valve and the hot water pouring valve are opened. Many dispenser dispensing valves have a structure in which the valve is automatically closed by the force of a spring when the hand is removed from the irrigation handle after irrigation. In such a case, as shown in FIG. 15, it is preferable that the water filling handle 1504 is fixed with a rubber band 1505 so that it does not return to its original position. In the dispenser having a cooler, the efficiency of heat sterilization can be improved by stopping the operation of the cooler after the third step.

The dispenser heat sterilization method according to the ninth aspect of the present invention can simply perform heat sterilization of the dispenser without using a special device only by using the above-mentioned familiar tools. In addition, according to this method, it is an excellent heat sterilization method in that it can be heat sterilized including a cold water pouring valve that is always in contact with the outside air and easily propagates germs.

Finally, in order to confirm that the heat sterilization treatment in the dispenser according to the first to eighth inventions or the ninth heat sterilization method is effective, the following test was conducted using the heat sterilization method of Example 9. went.

Here, the dispenser used for the test is as follows. (1) The dispenser which was the subject of the heat sterilization method in Example 9 was used. That is, it is a dispenser having a dedicated dispensing valve for cold water dispensing and hot water dispensing. (2) It is used for one month under the standard use conditions that consume about four 12L bottles per month. (3) At the start of use of the dispenser, the number of general bacteria detected in cold water taken from the cold water outlet is 1500 or more. (4) The water used is mineral water in a detachable drinking water container, and the number of bacteria in the drinking water in the drinking water container is not detected or is 30 or less. (5) Dispensers shall be installed in a place similar to that of a general office or living room in a place not exposed to direct sunlight. (6) The dispenser has a dedicated switch for cutting off the power supply of only the cooler.

The specific test procedure is as follows. (1) Turn off the compressor and stop the production of cold water. At this time, the heating function of the hot water tank is left as it is. (2) Connect the hot water faucet and cold water faucet with a hose as in FIG. 15, and open each faucet so that hot water and cold water can circulate freely (start of hot water circulation sterilization). (3) After the start of hot water circulation sterilization, water is taken from the cold water tap at each time of 0 minutes, 15 minutes, 30 minutes, 45 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes and 180 minutes, and the temperature is recorded. . (4) When 180 minutes have elapsed since the start of hot water circulation sterilization, close the open faucet, remove the hose, turn on the compressor, and return to normal use. (5) Perform the same test on two water servers A and B. (6) One milliliter of the drinking water collected in (3) was cultured on a standard agar medium at 35 ± 1 ° C. for 48 hours, and the number of colonies was counted.

The test results are shown below. The temperatures in the table are in degrees Celsius. The number of bacteria in the table represents the number of colonies of general bacteria measured in the procedure (6). In the production standard for mineral waters (S34.12.28 standard for food and additives, Ministry of Health and Welfare Notification No. 370), the standard agar medium method does not exceed 100 per milliliter. The bacteria decreased to almost zero, and a sufficient bactericidal effect was confirmed.

Inspection start date September 14, 2009

0301 Three-neck valve 0302 Cold water piping system 0303 Hot water piping system 0304 Hot water tank 0305 Cold water tank 0306 Hot water piping system 0307 Intake port 0308 Cold water piping system 0309 Injection port

Claims

An intake for taking drinking water,
A three-neck valve that has three mouths, selects any two of the three mouths, and allows drinking water to pass between them,
A water inlet connected to one of the three mouths of the three-way valve, for pouring out drinking water;
For cold water, which is a piping system through which drinking water passes between the intake port and one of the remaining two ports of the three-way valve, and has a chilled water tank with a cooler in the piping system A piping system;
A hot water piping system, which is a piping system through which drinking water passes between the intake port and the remaining one port of the three-way valve, and has a hot water tank provided with a heating device in the piping system; A dispenser having
An intake for taking drinking water,
A cold water dispensing valve for dispensing cold drinking water;
A hot water dispensing valve for dispensing heated drinking water;
A piping system through which drinking water passes between the intake port and the cold water dispensing valve, and a piping system for cold water that is a piping system having a cold water tank equipped with a cooler in the piping system;
A hot water piping system that is a piping system through which drinking water passes between the intake port and the hot water dispensing valve, and a hot water tank having a heating device in the piping system;
It is a piping system through which drinking water passes between the cold water extraction valve side end of the cold water piping system and the hot water extraction valve side end of the hot water piping system, and water is passed through the piping system. And a circulation piping system having an on-off valve for opening and closing.
An intake for taking drinking water,
A selective dispensing valve which has two intakes, selects one of the two intakes, takes drinking water, and pours water from the spout;
A piping system through which drinking water passes between the intake port and one of the two intake ports of the selective dispensing valve, the piping system having a chilled water tank equipped with a cooler in the piping system. A cold water piping system;
A hot water pipe which is a piping system through which drinking water passes between the intake port and the remaining intake port of the selective dispensing valve, and has a hot water tank provided with a heating device in the piping system The system,
A piping system through which drinking water passes between the end of the selective discharge valve side of the cold water piping system and the end of the selective extraction valve side of the hot water piping system, and in the piping system Dispenser having a circulation piping system having an on-off valve for opening and closing water flow
The cold water tank and the hot water tank are installed so that the center of gravity of the drinking water in the cold water tank is above the center of gravity of the drinking water in the hot water tank. Dispenser.
Among the three ports of the three-neck valve, it has an automatic switching device that automatically opens and closes between a port connected to the cold water piping system and a port connected to the hot water piping system according to a predetermined condition. The dispenser according to claim 1.
The dispenser according to claim 2 or 3, further comprising an automatic opening and closing device that automatically opens and closes the opening and closing valve according to a predetermined condition.
4. The dispenser according to claim 1, further comprising a circulation pump in the piping system.
The dispenser according to claim 5 or 6, wherein a circulation pump is provided in a piping system, and the automatic switching device controls the circulation pump.
Between a water intake port for taking drinking water, a cold water dispensing valve for dispensing cooled drinking water, a hot water dispensing valve for dispensing heated drinking water, and the intake port and the cold water dispensing valve A piping system through which drinking water passes, a piping system for cold water that is a piping system having a cold water tank in the piping system, and a piping system through which drinking water passes between the intake port and the hot water discharge valve A method for heat sterilizing a dispenser having a hot water piping system that is a piping system having a hot water tank equipped with a heating device in the piping system,
A first step of heating the drinking water in the hot water tank with a heating device;
A second step of connecting the cold water extraction valve and the hot water extraction valve by piping;
A dispenser heat sterilization method comprising a third step of opening both the cold water pouring valve and the hot water pouring valve.