JP3064226B2 - Automatic sterilization method and apparatus for pure water supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sterilization technique for a water supply apparatus, and more particularly to an automatic sterilization method and apparatus for a pure water supply apparatus for distributing pure water to a plurality of water supply ports, and to this type of technique. The present invention relates to a sanitary manual valve.

[0002]

2. Description of the Related Art In factories and various testing laboratories for manufacturing pharmaceuticals, purified water called pyrogen-free water and pyrogen-free water (hereinafter referred to as PFW) are used. Here, the pyrogen-free water is water filtered by an ultrafilter or the like. For example, in a pharmaceutical factory, pharmaceuticals are often manufactured in a clean room, and a faucet or a water supply port of pure water is often arranged in the clean room.
Pure water circulates inside the pure water supply device at a temperature of room temperature to 40 ° C. This pure water supply device is provided in a pure water tank in which pure water is stored, a pure water tank, a water distribution path for distributing pure water from the pure water tank to a plurality of water inlets, and returning excess pure water to the pure water tank, and a water distribution path. Circulating pump and a plurality of manually adjustable valves provided at a plurality of water supply ports, respectively.

[0003] Pure water is used not only for the production of pharmaceuticals but also for washing the hands of workers and equipment.
Therefore, a manual valve whose opening can be adjusted is often attached to the water supply port. However, it is easy to create a place where pure water stays inside the water supply channel of the pure water supply device. In particular, pure water tends to stagnate near unused manual valves. The temperature of pure water is as low as room temperature to 40 ° C., and bacteria easily grow in the retained pure water. Therefore, about once a week, it is necessary to pass high-temperature PFW through a pure water supply device and a manual valve to sterilize the PFW.

[0004]

Conventionally, a heater for heating pure water flowing through a water distribution channel of a pure water supply device is provided to raise the temperature of the pure water to a temperature required for sterilization, and the heated pure water is heated. After passing water through the pure water feeder, the manual valve was manually opened to sterilize the pure water feeder and the manual valve. However, as described above, since the pure water supply port is located in the clean room, the sterilization worker must wear sterilized clothes to enter the clean room, which is costly and requires a large number of manual valves. In many cases, there is a problem that the sterilization work takes one day.

It is an object of the present invention to provide an apparatus and method for automatically sterilizing a pure water feeder and a pure water feeder which enable automatic sterilization of a manual valve.

Another object of the present invention is to provide an automatic sterilizing apparatus and method capable of sterilizing efficiently in a short time.

It is another object of the present invention to provide an automatic sterilizing apparatus and method for a pure water supply apparatus which can sterilize a manual valve without opening the manual valve.

It is still another object of the present invention to provide an automatic sterilizing apparatus and method for a pure water feeder which can prevent idle operation of a circulation pump when performing automatic sterilization.

It is another object of the present invention to provide an automatic sterilizing apparatus and method for a pure water supply apparatus capable of automatically draining pure water remaining in a pure water tank after completion of sterilization.

Another object of the present invention is to provide an automatic sterilizing apparatus for a pure water feeder which can sterilize a diaphragm without opening the manual valve when a diaphragm valve is used as a manual valve.

Still another object of the present invention is to provide a sanitary manual valve device capable of automatic sterilization.

Another object of the present invention is to provide an inexpensive sanitary manual valve device capable of automatic sterilization.

Another object of the present invention is to provide an inexpensive sanitary manual valve device in which bacteria propagated from a bypass channel during non-sterilization do not flow out through a manual valve.

[0014]

According to the present invention, an inlet space and an outlet space of a manual valve are connected by a bypass flow path,
Two automatic open / close valves for blowing are provided in this bypass flow passage so as to be adjacent to the above-mentioned inlet space and outlet space. Then, the pure water flowing in the water distribution channel is heated to a temperature required for sterilization or higher, and the heated pure water is circulated to sterilize the pure water tank and the water distribution channel. Thereafter, the two automatic opening and closing valves for blowing are opened to sterilize the manual valve. In this case, the sterilization of the pure water supply device and the manual valve can be automatically performed.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The method of the present invention is characterized in that pure water is distributed from a pure water tank in which pure water is stored to a plurality of water supply ports through a water distribution channel equipped with a circulation pump, and surplus pure water is supplied to the pure water tank. Return, heat the pure water flowing through the water distribution channel with a heater to sterilize the pure water tank and the water distribution channel, and then use the heated pure water to adjust the opening of each of the multiple water supply ports. It is intended for an automatic sterilization method for a pure water feeder that sterilizes a simple manual valve.

In the present specification, pure water is purified water,
PFW and the like. Further, the plurality of water supply ports include not only a so-called faucet but also a water supply port directly connected to another appliance. Further, the structure of the heater for heating the pure water flowing in the water distribution channel is arbitrary, but it is preferable that the heater is indirectly heated by using the heat of steam which is relatively easily available in the factory.
Further, the structure of the manual valve that can adjust the opening is also optional,
Generally, a sanitary manual valve having a diaphragm valve is used as a valve body.

In the method of the present invention, a bypass flow path is provided so as to connect the inlet space and the outlet space of the plurality of manual valves, and the bypass flow passage is provided adjacent to the inlet space and the outlet space of the manual valve. Provide two automatic opening and closing valves for blow. The bypass passage is preferably provided so that the inner wall surfaces of the inlet space and the outlet space of the manual valve can be sufficiently sterilized when hot pure water flows through the bypass passage. That is, when hot pure water flows through the bypass passage, it is preferable to provide the bypass passage so that the pure water does not stay in the inlet space and the outlet space of the manual valve. In particular,
Heated pure water flowing through the bypass flow path when the two blow open / close valves are opened, the distance between the opening of the bypass flow path communicating with the inlet space and the outlet space and the diaphragm valve May be set so as to fall within a distance range in which it contacts a part of the diaphragm valve. In this way, the manual valve can be almost completely sterilized.

In the bypass passage, two automatic opening / closing valves for blowing are provided adjacent to the inlet space and the outlet space of the manual valve. As two blow open / close valves,
For example, a pneumatically operated sanitary pneumatically operated valve can be used. If at least one of the two automatic opening / closing valves for blowing is adjustable, the amount of pure water discharged through the outlet space of the manual valve can be adjusted. The two automatic opening / closing valves for blow are provided adjacent to the inlet space and the outlet space of the manual valve because the longer the distance between the inlet and outlet spaces and the two automatic opening / closing valves is, the more pure water is between them. The stagnation part of
This is because bacteria proliferate in the staying portion. Therefore, the mounting position of the two automatic opening / closing valves for blowing is a position where the stagnation portion of pure water is not formed in the internal partial passage between the inlet space and the outlet space and the two automatic opening / closing valves for blowing. It is preferable that the length between the inlet space and the outlet space of the two automatic opening / closing valves for blow and the manual valve provided in the bypass flow path is set to a length within 6 times the diameter of the bypass flow path. This value was found by testing.

In the method of the present invention, the pure water is heated by the heater so that the temperature of the pure water flowing through the water distribution channel reaches the temperature required for sterilization, and the pure water heated until the time required for sterilization has elapsed. To sterilize the pure water tank and the water distribution channel. Thereafter, the two automatic opening and closing valves for blowing are opened to sterilize the manual valve, and after the sterilization is completed, the two automatic opening and closing valves for blowing are closed. Here, the higher the temperature required for the sterilization, the better. However, if the temperature is too high, the heat-resistant temperature of each member must be increased. Conversely, if the temperature is too low, sterilization cannot be performed sufficiently. According to research, it has been found that sterilization can be surely achieved by setting the temperature required for the sterilization to 80 ° C. or more and the time required for the sterilization to 30 minutes or more. By appropriately setting this temperature and time,
Sterilization can be completed in a short time by using a member having low heat resistance.

When the two automatic opening and closing valves for blowing are closed after the sterilization is completed, pure water stays in the bypass passage located between the two automatic opening and closing valves for blowing. However, the pure water staying in this portion does not flow out even if the manual valve is opened, and is discharged during the next sterilization operation, so that there is no problem.

If at least one of the two automatic opening / closing valves for blowing is an automatic opening / closing valve for adjusting the opening, the outflow time of the heated pure water flowing through the bypass passage can be adjusted arbitrarily. The sterilization time of the manual valve can be set arbitrarily, and high-temperature pure water can be prevented from scattering.

If all of the pure water in the pure water tank is to be discharged through the bypass passage, there is a high risk that the circulation pump will run idle. In order to prevent such a situation from occurring, it is conceivable to stop the circulating pump when a predetermined timer time elapses by using timer means. However, in the case of using the timer means, if the setting of the timer is wrong, the idling of the circulation pump cannot be prevented. In order to prevent such a situation, a residual water sensor for measuring the residual water amount in the pure water tank is provided, and when the residual water sensor detects that the water in the pure water tank has decreased to a predetermined amount, two residual water sensors are provided. It is preferable to close the automatic opening / closing valve for blowing and stop the circulation pump. The residual water sensor may be a liquid level sensor such as a float switch disposed inside the tank for measuring the liquid level.

When the circulation pump is stopped, pure water used for sterilization remains in the pure water tank. This residual water can be discharged from the pure water tank by opening a drain cock provided in the drain of the pure water tank. To automate this task,
An automatic opening / closing valve for drainage may be provided in the drainage channel of the pure water tank, and the automatic opening / closing valve for drainage may be automatically opened after the circulation pump stops. When draining from the pure water tank, it is necessary to prevent the inside of the pure water tank from becoming a negative pressure. Specifically, air may be introduced into the pure water tank and pushed out, or a vent provided with a vent filter may be arranged above the pure water tank.

The device of the present invention for realizing the method of the present invention comprises:
A pure water tank for storing pure water, a distribution path for distributing pure water from the pure water tank to a plurality of water inlets and returning excess pure water to the pure water tank, a circulation pump provided in the distribution path, The present invention is directed to an automatic sterilization apparatus for a pure water supply apparatus, comprising: a plurality of manually adjustable valves provided at respective water supply ports, each of which is provided with an adjustable opening; and a heater for heating pure water flowing through the water distribution passage. In the apparatus of the present invention, basically, the bypass space is provided so as to connect the inlet space and the outlet space of the plurality of manual valves and prevent pure water from staying in the inlet space and the outlet space. Also, the bypass passage is located adjacent to the inlet space and outlet space of the manual valve.
Provide two automatic opening and closing valves. When the temperature of the pure water flowing through the water distribution channel is heated by the heater to a temperature required for sterilization, a valve control device that opens two automatic opening and closing valves is provided.

In order to accurately determine whether the temperature of the circulating pure water has reached the temperature required for sterilization, for example, a first temperature sensor for measuring the temperature of pure water supplied through a water distribution passage, A second temperature sensor for measuring the temperature of the pure water returned to the pure water tank through the path. Only when both the first and second temperature sensors detect a temperature higher than the temperature required for sterilization, it is determined that the temperature of the circulating pure water has reached the temperature required for sterilization.

If a water supply automatic opening / closing valve is provided in a flow path for supplying pure water to the pure water tank, supply of pure water to the pure water tank can be automatically stopped. To prevent the circulation pump from running idle after sterilization, a residual water sensor for measuring the residual water amount in the pure water tank is provided. In addition, a pure water temperature sensor for measuring the temperature of pure water in the pure water tank is provided.
The valve control unit closes the automatic water supply open / close valve before starting sterilization, activates the circulation pump and operates the heater, and detects that the pure water has been heated to the temperature required for sterilization by the pure water temperature sensor. After the time required for sterilization has passed after the detection, the two automatic opening and closing valves for blowing are opened,
When the residual water sensor detects that the residual water amount in the pure water tank has reached a predetermined amount, it stops the circulation pump and
Each automatic open / close valve is controlled to close two blow open / close valves.

In order to discharge the pure water remaining in the pure water tank after the sterilization, an automatic opening / closing valve for drainage is provided in the drain of the pure water tank. Finally, the valve control device is configured to open the drainage automatic opening / closing valve to drain the residual water in the pure water tank.

In order to realize the method and the device of the present invention, it is preferable to use a sanitary manual valve device in which a manual valve is provided with two automatic opening / closing valves for blowing. The sanitary manual valve device includes a manually operated diaphragm valve between an inlet space and an outlet space. A bypass passage is provided to connect the inlet space and the outlet space, and two automatic opening / closing valves for blowing are provided in the bypass passage adjacent to the inlet space and the outlet space.

[0029]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing an example of an embodiment of an automatic sterilizing apparatus for performing an automatic sterilizing method for a pure water supply apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a liquid tank or a pure water tank in which pure water is stored. Is supplied. In the middle of the water pipe 2,
An automatic opening / closing valve 3 for water supply is provided. The water supply automatic opening / closing valve 3 opens and closes according to a command from the valve control device 4. Above the pure water tank 1, a vent 5 having a vent filter is provided. The inside of the pure water tank 1 is always at normal pressure or positive pressure through the vent 5.
A drain pipe 6 is connected to a lower portion of the pure water tank 1, and the drain pipe 6 is provided with an automatic drain opening / closing valve 7. The drainage automatic opening / closing valve 7 also opens and closes in response to a command from the valve control device.

To the pure water tank 1, a residual water sensor 15 composed of, for example, a float switch or a capacitance level meter is mounted.

For the pure water tank 1, there is provided a water distribution passage 8 for distributing the pure water from the pure water tank 1 to the plurality of water supply ports 8a and 8b and returning the remaining pure water to the pure water tank 1. I have. The water distribution channel 8 is configured by a metal pipe, and a circulation pump 9 and a heater 10 are arranged in the middle of the pipe. Two water supply ports 8 extending from the water distribution channel 8
a and 8b each have a manual valve 1 whose opening can be adjusted.
1a and 11b are attached. In an actual plant, the number of water supply ports is much larger. In this example, only two water supply ports are shown for simplicity of illustration. A first temperature sensor 13 for measuring the temperature of pure water flowing out of the pure water tank 1 is provided in a pipeline located at a lower side of the pure water tank 1 among the pipelines constituting the water distribution path 10. In addition, a second temperature sensor 14 for measuring the temperature of pure water flowing into the pure water tank 1 is provided in a pipeline located on the upper side of the pure water tank. Although the first and second temperature sensors 13 and 14 may be configured to measure the temperature of the pipe wall of the pipeline and indirectly measure the temperature of pure water, the sensors are actually disposed inside the pipeline. Alternatively, the temperature of the pure water may be directly measured. In the case of directly measuring the temperature of pure water, the temperature sensor may be arranged so as to sandwich the temperature sensor at the connection of the pipes constituting the water distribution channel. Outputs of the first and second temperature sensors 13 and 14 are transmitted to the valve control device 4. In this example, the first and second temperature sensors 13 and 14 constitute a pure water temperature sensor that measures the temperature of pure water in the pure water tank.

The heater 10 is operated by the heat of the steam to distribute water 8
It is configured to indirectly heat pure water flowing through the inside. This heater 10 heats pure water to a temperature required for sterilization. In this example, a function of controlling the circulation pump 9 and the heater 10 is included in the valve control device 4. In this example, the temperature required for sterilization is set to 80 ° C., and the pure water flowing through the water distribution channel 8 and the pure water in the pure water tank are heated. In this example, the first and second temperature sensors 13 and 14 measure whether or not the temperature of the pure water has been heated to 80 ° C. If both the first and second temperature sensors 13 and 14 detect 80 ° C., it is possible to reliably measure that the pure water inside the water distribution channel 8 has reached 80 ° C. Note that it may be detected that the temperature of the pure water in the pure water tank 1 has reached 80 ° C., and that the pure water in the drainage channel 8 has been heated to 80 ° C.

A bypass pipe 12 which constitutes a bypass passage is attached to manual valves 11a and 11b whose opening can be adjusted, which are respectively provided at water supply ports 8a and 8a provided in the middle of the water distribution passage 8. This bypass line 1
2 has two automatic opening / closing valves 13a and 13b for blowing.
Is installed. In this example, a manual valve, a bypass pipe line, and two automatic opening / closing valves for blowing constitute a sanitary manual valve device.

FIGS. 2A and 2B are a front view and a right side view of an example of the sanitary manual valve device used in this example. The manual valve 11 whose opening can be adjusted includes an inlet space 11A communicating with the inside of the water distribution passage, a valve operation space (not shown) in which a diaphragm valve is arranged, and a manual valve 1.
1 has a structure in which an outlet space 11B for discharging pure water is formed inside. A manually operated diaphragm valve is provided between the inlet space 11A and the outlet space 11B, and the diaphragm valve is deformed by the rotation of the operation handle 11C to adjust the flow rate.
This type of manual valve is called a diaphragm valve and is generally available.

The bypass 12 which forms a bypass passage
Are the inlet space 11A and the outlet space 11B of the manual valve 11.
Are connected so that pure water does not stay in the inlet space 11A and the outlet space 11B. That is, when high-temperature pure water flows through the bypass pipe 12 in a state where the two automatic opening and closing valves 13a and 13b for blow described later are opened, the inlet space 11A and the outlet space 11B of the manual valve 11 It is preferable to provide the bypass pipe 12 so that the wall surface can be sufficiently sterilized. That is, it is preferable to provide a bypass passage so that pure water does not stay in the inlet space 11A and the outlet space 11B of the manual valve 11 when hot pure water flows through the bypass pipe 12. Specifically, the distance between the opening of the bypass pipe 12 communicating with the inlet space 11A and the outlet space 11B and the diaphragm valve (not shown) is determined when the two automatic opening / closing valves 13a and 13b are opened. The heated pure water flowing through the bypass line 12 passes through the diaphragm
The mounting position of the bypass pipe 12 may be determined so as to fall within a distance range where the bypass pipe 12 contacts a part of the valve. In this way, even if the manual valve 11 does not open,
Can be almost completely sterilized.

The two automatic opening / closing valves 13a and 13b for blowing are diaphragm valves with pneumatically operated valves. As this type of valve, for example, a serial number BHOT1413NC manufactured and sold by Japan Diaphragm Valve Co., Ltd.
A -8JT valve can be used. This valve opens and closes by deforming the diaphragm film by air pressure. When the pressure of the air is increased, the diaphragm film rises and becomes open, and when the pressure of the air is decreased, the diaphragm film lowers and becomes closed. In this example, a valve whose opening can be adjusted is used as the blowing automatic opening / closing valve 13a located on the upstream side. Note that these two automatic opening / closing valves 13a and 13b are
The opening and closing are controlled by a command from. The two automatic opening and closing valves 13a and 13b for blowing are provided adjacent to the inlet space 11A and the outlet space 11B of the manual valve 11. As the distance between the inlet space 11A and the outlet space 11B and the two automatic opening / closing valves 13a and 13b becomes longer, a reservoir of pure water is formed therebetween, and bacteria grow in the reservoir. Therefore, the mounting position of the two blow open / close valves 13a and 13b is
This is a position where a detained portion of pure water is not formed in the internal partial passage between the 1A and the outlet space 1B and the two automatic opening and closing valves 13a and 13b for blowing. More specifically, two blow open / close valves 13 a and 13 b provided in the bypass pipe 12 and an inlet space 1 of the manual valve 11 are provided.
The lengths L1 and L2 between 1A and the outlet space 11B are set to a length within 6 times the diameter of the bypass line 12. This can prevent the formation of a stagnant portion where bacteria grow.

Next, a process for sterilizing a pure water supply apparatus using this apparatus will be described with reference to FIGS. 3 (A) to 3 (C). First, in order to perform sterilization, the valve control device 4
Turns on the heater 10 as shown in FIG. 3A and partially heats the water distribution passage 8. The pure water heated by the heater 10 is circulated by the operation of the circulation pump 9. After a certain period of time, both the temperature of the pure water returned to the pure water tank 1 and the temperature of the pure water flowing out of the pure water tank 1 rise. This increase in temperature is measured by the first and second temperature sensors 13 and 14. Then, as shown in FIG. 3 (B), after the valve control device 4 confirmed that the detected temperatures of the two temperature sensors 13 and 14 both exceeded 80 ° C. (the temperature required for sterilization), the heating was performed. Circulate pure water for about 30 minutes. Thus, the inside of the pure water tank 1 and the water distribution passage 8 is sterilized, that is, sterilized at a high temperature. In order to raise the temperature in the pure water tank 1 in a short time, it is preferable that the liquid level in the pure water tank 1 is lower than the liquid level during normal operation. In order to adjust such a liquid level, the drainage automatic opening / closing valve 7 shown in FIG.

Next, the valve controller 4 outputs a command to open the two automatic opening / closing valves 13a and 13b of the sanitary manual valve devices provided at the water supply ports 8a and 8b. As shown in FIG. 3C, when the two automatic opening / closing valves 13a and 13b are opened, heated high-temperature pure water is discharged from the water distribution passage through the bypass conduit 12 (FIG. 2). The high-temperature pure water is discharged while sterilizing the inner surfaces of the inlet space 11A and the outlet space 11B (FIG. 2) of the manual valves 11a and 11b.

After the two blow open / close valves 13a and 13b are opened, the residual water sensor 15 detects that the pure water remaining in the pure water tank 1 has decreased to a level that causes the circulation pump to run idle. Then, the valve control device 4
Closes the two blow open / close valves 13a and 13b and stops the operation of the circulation pump 9 and the heater 10. After these stop operations are completed, the valve control device 4 opens the drainage automatic opening / closing valve 7 (FIG. 1) to discharge the pure water remaining in the pure water tank 1.

After the pure water in the pure water tank 1 is discharged, the valve control device 4 closes the drainage automatic opening / closing valve 7, opens the water supply automatic opening / closing valve 3 (FIG. 1), and sends the water from a pure water producing device (not shown). Create a system for receiving pure water.

The above series of operations can be easily executed by using a computer built in the valve control device 4. Of course, the program may be executed by sequence control without using a computer.

The constituent features of some inventions among a plurality of inventions described in the specification of the present application are listed below.

(1) Distribute fluid from a liquid tank in which a liquid requiring a high sterilization degree is stored to a plurality of liquid supply ports through a water distribution channel, return surplus liquid to the liquid tank, and flow through the liquid distribution channel. A liquid is heated by a heater to sterilize the liquid tank and the liquid distribution path, and then, using the heated liquid, a plurality of manually adjustable valves provided at the plurality of water supply ports, respectively. An automatic sterilization method of a liquid supply device for sterilizing, wherein a bypass flow path is provided so as to connect an inlet space and an outlet space of the plurality of manual valves, and the inlet space of the manual valve and the bypass space are provided in the bypass flow path. Two automatic opening and closing valves for blowing are provided adjacent to the outlet space, and the liquid is heated by the heater until the temperature of the liquid flowing through the water distribution channel reaches a temperature required for sterilization. After sterilizing the liquid distribution path, after the time required for sterilization has elapsed, the two automatic opening and closing valves are opened to sterilize the manual valve, and after the sterilization is completed, the two automatic opening and closing valves for blowing are closed. Automatic disinfection method of the liquid supply device.

(2) a liquid tank for storing a liquid requiring a high sterilization degree, a liquid distribution path for distributing the liquid from the liquid tank to a plurality of liquid supply ports and returning surplus liquid to the liquid tank; A circulation pump provided in the liquid distribution channel, a plurality of manually adjustable valves provided in the plurality of liquid supply ports, respectively, and a heater for heating the liquid flowing in the liquid distribution channel. An automatic sterilizing device for a liquid supply device, wherein a bypass flow path is provided for connecting an inlet space and an outlet space of the plurality of manual valves, and the bypass space includes the inlet space and the outlet space of the manual valve. A valve control device that opens the two automatic opening and closing valves when the temperature of the liquid flowing through the liquid distribution path is heated by a heater to a temperature required for sterilization, and Having An automatic sterilizer for a liquid supply device.

As in the above two inventions, the present invention can be used for supplying a liquid other than pure water.

[0046]

According to the present invention, there is an advantage that the sterilization of the pure water supply device and the manual valve can be automatically performed. Further, according to the present invention, the manual valve can be sterilized without opening the manual valve.

Further, according to the present invention, there is an advantage that it is possible to provide an inexpensive sanitary manual valve device in which bacteria propagated from the bypass flow path during non-sterilization do not flow out through the manual valve.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an embodiment of an apparatus for performing an automatic sterilization method for a pure water supply apparatus of the present invention.

FIGS. 2A and 2B are a front view and a right side view of an example of a sanitary manual valve device used in this example.

FIGS. 3A to 3C are diagrams used to explain the operation of the embodiment of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pure water tank 2 Water supply pipe 3 Automatic supply opening / closing valve for water supply 4 Valve control device 5 Negative pressure release valve 6 Water distribution pipe 7 Automatic opening / closing valve for drainage 8 Water distribution channel 9 Circulation pump 10 Heater 11, 11a, 11b Opening degree adjustable Manual valve 11A Inlet space 11B Outlet space 12 Bypass pipe (bypass passage) 13,14 Temperature sensor 15 Residual water sensor

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukimasa Ishikawa 553 1 Shinnomachi, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture 1407 Park Hills L Building (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1 / 02

Claims (13)

(57) [Claims] 1. Pure water is distributed from a pure water tank in which pure water is stored to a plurality of water supply ports through a water distribution path provided with a circulation pump, and surplus pure water is returned to the pure water tank and flows through the water distribution path. The pure water is heated by a heater to sterilize the pure water tank and the water distribution channel, and thereafter, the plurality of manually adjustable opening degrees provided at the plurality of water supply ports using the heated pure water. A method of automatically sterilizing a pure water supply device for sterilizing a valve, wherein a bypass flow path is provided so as to connect an inlet space and an outlet space of the plurality of manual valves, and the inlet space and the outlet space of the manual valve are provided. Two automatic open / close valves for blowing are provided in the bypass flow passage adjacent to the heater, and the pure water is heated by the heater so that the temperature of the pure water flowing through the water distribution channel reaches a temperature required for sterilization. Required time passes Then, the pure water is circulated to sterilize the pure water tank and the water distribution channel. Then, the two automatic opening / closing valves for blowing are opened to sterilize the manual valve. The method for automatically sterilizing a pure water feeder, comprising: 2. The method according to claim 1, wherein the temperature required for the sterilization is 80 ° C. or more, and the time required for the sterilization is 30 minutes or more. 3. The length between the inlet space and the outlet space of the two automatic opening / closing valves for blow provided in the bypass flow passage and the manual valve is within 6 times the diameter of the bypass flow passage. The method for automatically sterilizing a pure water supply apparatus according to claim 1. 4. The pure water is distributed from a pure water tank in which pure water is stored to a plurality of water supply ports through a water distribution path provided with a circulation pump, and surplus pure water is returned to the pure water tank and flows through the water distribution path. The pure water is heated by a heater to sterilize the pure water tank and the water distribution channel, and thereafter, the plurality of manually adjustable opening degrees provided at the plurality of water supply ports using the heated pure water. A method for automatically disinfecting a pure water supply device for disinfecting a valve, wherein the manual water valve uses a diaphragm manual valve having a valve body made of a diaphragm and having an inlet space and an outlet space on both sides of the diaphragm. A water supply automatic opening / closing valve is provided in a flow path for supplying pure water to the flow path, a residual water sensor for measuring a residual water amount of the pure water tank is provided, and an inlet space and an outlet space of the diaphragm manual valve are connected. And a bypass passage is provided so that pure water does not stay in the inlet space and the outlet space. The bypass passage has an internal portion formed between the inlet space and the outlet space of the manual valve. Two automatic opening and closing valves for blow are provided so that a stagnant portion of pure water is not formed in the passage, and after the automatic opening and closing valve for water supply is closed, the temperature of the pure water flowing through the water distribution passage is reduced to a temperature required for sterilization. The pure water is heated by the heater so as to reach, the pure water is circulated until the time required for sterilization has elapsed, the pure water tank and the water distribution passage are sterilized, and then the two automatic opening and closing valves are opened. The manual valve is sterilized, and when the residual water sensor detects that the water in the pure water tank has reached a predetermined amount, the two automatic opening / closing valves for blow are closed and the circulation pump is stopped. Automatic sterilization method of the pure water feed water and wherein the. 5. provided drainage automatic opening and closing valve to the drainage path of the pure water tank, according to claim 4, after the circulating pump is stopped, characterized in that opening the drainage automatic opening and closing valve
3. The method for automatically sterilizing a pure water supply device according to 1.). 6. A pure water tank for storing pure water, a pure water tank for distributing pure water from the pure water tank to a plurality of water inlets, and a distribution path for returning surplus pure water to the pure water tank; An automatic pure water feeder comprising: a circulating pump provided; a plurality of manually adjustable valves provided at the plurality of water supply ports; and a heater for heating pure water flowing through the water distribution passage. In a sterilizer, a bypass flow path is provided so as to connect an inlet space and an outlet space of the plurality of manual valves and to prevent pure water from staying in the inlet space and the outlet space. Is provided with two automatic opening and closing valves adjacent to the inlet space and the outlet space of the manual valve, and when the temperature of pure water flowing through the water distribution passage is heated by a heater to a temperature required for sterilization. The two automatic opening and closing valves An automatic sterilizer for a pure water supply device, comprising a valve control device for opening the water. 7. A pure water tank for storing pure water, a pure water tank for distributing pure water from the pure water tank to a plurality of water inlets, and a distribution path for returning surplus pure water to the pure water tank; An automatic pure water supply apparatus comprising: a circulating pump provided; a plurality of manually adjustable valves provided at the plurality of water supply ports; and a heater for heating pure water flowing through the water distribution passage. A sterilizing apparatus, wherein a diaphragm manual valve is used as the manual valve, wherein a valve body is formed of a diaphragm valve, and an inlet space and an outlet space are provided on both sides of the diaphragm valve, and pure water is supplied to the pure water tank. A water supply automatic opening / closing valve is provided in the flow path, and a pure water temperature sensor for measuring a temperature of pure water in the pure water tank; a residual water sensor for measuring a residual water amount of the pure water tank; Diaphragm A bypass flow path that connects an inlet space and an outlet space of the manual valve and is capable of sufficiently sterilizing the inner wall surfaces of the inlet space and the outlet space; and an inlet of the diaphragm manual valve in the bypass flow path. 2 provided at a position adjacent to the space and the exit space
Closing the automatic opening and closing valve for water supply before starting the sterilization,
While operating the circulation pump and operating the heater, after the time required for sterilization has passed after the pure water temperature sensor detects that the pure water has been heated to the temperature required for sterilization, the two blows Opening the automatic open / close valve and stopping the circulating pump when the residual water sensor detects that the residual water amount in the pure water tank has reached a predetermined amount and closing the two blow automatic open / close valves. An automatic sterilizing device for a pure water supply device, comprising: a valve control device that controls each automatic opening and closing valve. 8. A distance between an opening of the bypass flow passage communicating with the inlet space and the outlet space and the diaphragm valve is set when the two blow open / close valves are opened. The position of the communication part between the bypass flow passage and the inlet space and the outlet space is determined so that the heated pure water flowing through the bypass flow passage is within a distance range where the pure water comes into contact with a part of the diaphragm valve. The automatic sterilizer for a pure water feeder according to claim 7, which is provided. 9. A pure water tank for storing pure water, a pure water tank for distributing pure water from the pure water tank to a plurality of water inlets, and a distribution path for returning surplus pure water to the pure water tank; Automatic sterilization of a pure water feeder comprising: a provided circulation pump; a plurality of manually adjustable valves provided at the plurality of water supply ports; and a heater for heating pure water flowing through the water distribution passage. An apparatus, comprising: an automatic opening / closing valve for water supply provided in a flow path for supplying pure water to the pure water tank; an automatic opening / closing valve for drain provided in a drainage path of the pure water tank; and A first temperature sensor for measuring a temperature of pure water supplied, a second temperature sensor for measuring a temperature of pure water returned to the pure water tank through the water distribution channel, and a residual water amount of the pure water tank. A residual water sensor to be measured, and the plurality of manual valves A bypass flow path connecting the inlet space and the outlet space of the valve and preventing pure water from staying in the inlet space and the outlet space; and the inlet space and the outlet of the manual valve in the bypass flow passage. Two blow open / close valves provided adjacent to the space; and closing the water feed automatic open / close valve before starting sterilization;
The circulation pump is operated and the heater is operated, and after the time necessary for sterilization has elapsed after both the first and second temperature sensors have detected a temperature higher than the temperature required for sterilization, the two blows Open the automatic opening and closing valve, when the residual water sensor detects that the residual water amount of the pure water tank has reached a predetermined amount, stop the circulating pump and close the two blow automatic opening and closing valves, and finally A valve control device for controlling each of the automatic opening / closing valves so as to open the drainage automatic opening / closing valve and drain the residual water in the pure water tank. 10. The automatic sterilization of a pure water supply apparatus according to claim 8, wherein the temperature required for the sterilization is 80 ° C. or more, and the time required for the sterilization is 30 minutes or more. apparatus. 11. A sanitary manual valve device provided with a manually operated diaphragm valve between an inlet space and an outlet space, wherein the bypass valve is connected to connect the inlet space and the outlet space. A sanitary manual valve device, wherein a flow passage is provided, and two automatic opening / closing valves for blowing are provided adjacent to the inlet space and the outlet space in the bypass flow passage. 12. An automatic valve for opening and closing one of the two automatic opening and closing valves for blowing, the opening of which is adjustable.
The manual valve device for sanitary according to the above. 13. The length between two blow open / close valves provided in the bypass passage and the inlet space and the outlet space is within 6 times the diameter of the bypass passage. Item 13. A sanitary manual valve device according to Item 12.