JP4620155B2 - Pure water supply container - Google Patents

Description

  The present invention relates to a pure water supply container, and more particularly to an ultrapure water supply container.

  In the basic treatment operations in a wide range of chemical fields such as organic chemistry, inorganic chemistry, synthetic chemistry, biochemistry, biochemistry, etc. Alternatively, in the chemical treatment process, the operation of adding pure water many times in a complicated manner is very often performed depending on the reaction state.

(1) In order to solve such a problem, a container called a washing bottle or a washing bottle in which a crane-like thin tube is attached to a flexible polymer container may be used frequently. Since this type of container is made of a flexible polymer, the internal liquid can be efficiently discharged from the narrow tube by simply holding the container and applying pressure to crush the container. Then, the elasticity of the main body returns to the original, and the liquid can be discharged again. In addition, the thin tube is bent like a crane's neck and head, and the tip is processed to be thin, so that it is easy to inject liquid freely to the desired location, and the discharge speed can be adjusted by applying force. Is possible.
(2) In addition, a trigger type is known as a slightly complicated form of a manual liquid container, a trigger type pump is attached to the upper part of the container body, and a thin tube extending from the bottom inside the container body to an external discharge nozzle The thin tube is equipped with a check valve, and by pulling the trigger, the liquid is sucked up from the container through the thin tube having the check valve, and this is pressurized by the stroke of the next trigger, guided to the discharge nozzle, and discharged. Let

An example of the above (1) is described in Patent Document 1. As shown in FIG. 3, the conventional liquid supply container (washing bottle) is composed of a flexible polyethylene container body 5A, a polyethylene cap 4A that can be hermetically attached to and removed from the upper diameter portion of the container with screws, and an ejection nozzle 2A. The polyethylene tube 1A is fixed or slidably held by the tube holding portion 4B of the cap 4A, and the other end opening of the tube 1A is arranged at the bottom of the container main body 5A to provide a liquid 10A. Make it suckable. If the container main body 5A of the washing bottle having this structure is gripped and crushed to a desired extent, the internal pressure of the air portion in the bottle increases and the liquid is discharged from the nozzle 2A through the tube 1A. Furthermore, an air vent 8A is provided to prevent the liquid from being discharged from the nozzle 2A when the ambient temperature rises when the container is not in use, but it is closed during a normal discharge operation. Is not relevant.
An example of the above (2) is described in Patent Document 2. As shown in FIG. 4, the trigger type liquid supply container is composed of a container main body 1 and a trigger type ejector main body 2 attached to the upper part thereof. The container main body 1 has a threaded port at the upper end of the body part 3 and the upper shoulder part 4 thereof. It consists of the neck 5. The trigger-type ejector main body 2 includes a cylindrical base 6 on the lower surface of the main body 2a, and a lower portion of the cylindrical base 6 is fixed to the cylindrical body 10. The cylindrical body 10 has its outward flange 9 connected to the above-mentioned screwed neck. It is fixed to the container body 1 by an inward flange 7 of a mounting cylinder 8 having a screw that is screwed into a screw of the portion 5. Reference numeral 11 denotes a sealing packing. A tube fitting cylinder 13 hangs down as a liquid suction passage with a suction valve 12 for sending liquid into the pump chamber of the main body 2 a in the base cylinder portion 6, and the fitting cylinder 13 is connected via a connector 14. The suction tube 15 is connected, and the connector 14 is provided with a check valve 16B. Although 16A is a check valve, it is a supply path when the container is inverted and will not be described in detail.
Further, the outside air suction path 18 communicates with the cylinder 17 of the main body 2a, and the upper end of the suction path 18 opens when the plunger 20 moves back and forth by the operation of the trigger 19 so that the upper end of the outside air suction path 18 opens and is air permeable and non-permeable. Outside air is taken in through the water-based water-resistant sheet 21. The outside air suction passage 18 includes a first passage 18a provided in the cylinder 17, a second passage 18b provided in the top wall of the cylindrical body 10, and a concave groove 18c provided therebetween. The aqueous water-resistant sheet 21 is disposed in the concave groove 18c.
In the above configuration, the liquid is sucked into the tube 15 from the bottom of the container main body 11 by the operation of the trigger 19, sent to the ejector main body 2 through the check valves 16 B and 12, and pressurized in the main body 2 by the repeated operation of the trigger. , And is ejected from the tip of the nozzle 2b. At this time, the outside air is sucked through the water-resistant sheet 21 that is air permeable and water impermeable. Thus, the liquid can be supplied while preventing the liquid from flowing backward.
In addition, it is known that (3) a filter unit that is separate from the container is used when a volume of air corresponding to the supply amount (discharge amount, discharge amount) of the liquid is taken into the container that supplies the liquid. However, it is a relatively large system in which a container and a filter unit are installed separately, and a filter is not directly attached to a simple manual pure water supply container.

Japanese Utility Model Publication No. 1-137734 Japanese Utility Model Publication No. 1-69658

In the structure of the cleaning bottle of Patent Document 1 shown in FIG. 3, the air vent 8A allows the outside air to flow in. Therefore, contaminants and dust in the air easily enter the cleaning bottle, and a cleaning liquid such as pure water or ultrapure water is used. Cause pollution problems. On the other hand, since air does not enter when the air vent 8A is closed, the container body 5A is crushed by the volume of the liquid discharged from the nozzle when the container body 5A is held by hand, and when the container body 5A is released, the container body 5A is restored. The outside air flows back from the nozzle through the container tube 1A, causing a problem of contaminating the liquid inside the container body 5A.
On the other hand, in the trigger-type supply container of Patent Document 2 shown in FIG. 4, when the trigger 19 is pulled, liquid is sucked into the trigger-type ejector body 2 from the bottom of the container body 1 through the tube 15 and then the check valve 16B, and then pressurized. The liquid is discharged from the nozzle 2b. At the same time, the outside air is sucked in through the breathable and non-water-permeable water-resistant sheet 21, but the breathable and non-water-permeable water-resistant sheet 21. Does not have the ability to block air, so the liquid in the supply container will gradually become contaminated.

(1) The present invention provides a plastic container main body having a cylindrical wall portion and a top opening, a lid attached airtight to the top opening, and penetrating the lid into the container main body. a pure water supply tube extending to a pure water supply container and a discharge nozzle connected to an upper end of the deionized water supply tube mounted on top of the lid,
An upper position than that of pure water containing portion of the tubular wall portion, the air intake passage for taking outside air when pure water supply provided, the when the air intake passage becomes high internal pressure inside the filter and the container body A check valve for closing the air intake passage, and a check valve in the supply tube. The filter is characterized by a hydrophobic filtration membrane for removing fine particles such as suspended fine particles, particularly bacterial fine particles, and an organic substance. An adsorbent layer (for example, activated carbon layer) for adsorbing organic substances for adsorbing (especially volatile organic substances such as environmental hormones in the air), and Ca (OH) that can detect changes in color due to the limit of carbon dioxide contamination. _A pure water supply container is provided in which a carbon dioxide absorption layer made of 2 is superposed, preferably sandwiched between perforated plates, and the superposed body is surrounded by a transparent peripheral wall .
(2) In a more specific form, in the above (1), the cylindrical wall portion can be elastically crushed by hand, and the upper end of the pure water supply tube and the discharge nozzle are hermetically sealed. Directly connected.
(3) In another more specific form, in (1) above, it is preferable that a trigger-type sucking and feeding mechanism is disposed between the upper end of the pure water supply tube and the discharge nozzle.
(4) pre-Symbol hydrophobic filtration membrane is preferably an average pore diameter of 0.1 to 1.0 [mu] m, more preferably a porous material of 0.2 to 0.5 [mu] m, suspended particles in the air (in particular bacteria, such as Filter the fungi). The average pore diameter can be selected according to the degree of purification of pure water required by the application.
The adsorbent is preferably a molecular sieve, particularly activated carbon.
The carbon dioxide absorption layer preferably contains slaked lime Ca (OH) ₂ as a main component.
It is preferable that the filter has a first perforated support plate on the pure water storage portion side of the container body.
The filter may have a second perforated support plate outside the container body. In addition, the container body part, the cap part, or the second perforated support plate can be seen through so that the discoloration of Ca (OH) ₂ can be observed.

A simple manual-type pure water (including highly purified ultrapure water) supply container such as a crushing type or a trigger type is provided with a filter in the container body or cap part that constitutes the plastic pure water container. Clean air can be introduced, and at the same time, backflow of air from the nozzle to the inside of the container and contamination of pure water in the container due to the inflow of outside air from the air intake port are prevented, and residual pure water in use remains for a long time. Provided is a pure water supply container that is protected from being contaminated over a long period of time.
In a preferred embodiment, the present invention uses a hydrophobic porous filter membrane, an adsorption layer, and / or a carbon dioxide absorption layer as the filter, so that contamination of pure water by air dust, organic matter, and / or carbon dioxide is prevented. Can be prevented.
Further, since the check valve for the air intake port is provided, it is possible to prevent clean air from leaking out of the container, thereby improving the service life of the filter.
Furthermore, by providing a carbon dioxide absorption layer on the filter, pure water can be prevented from absorbing carbon dioxide, and the carbon dioxide absorption layer can be observed from the outside. Can be used to know the limit of use of the filter or the pure water supply container.

1 illustrates a crush-type pure water supply container according to a first embodiment of the present invention. The trigger type pure water supply container by the 2nd Example of this invention is illustrated. The conventional crushing type liquid supply container is illustrated. The conventional trigger type liquid supply container is illustrated. The Example of the filter of this invention is shown. The crushing type pure water supply container by the 3rd example of the present invention is illustrated. The operation at the time of water supply of the third embodiment of the present invention will be described. The operation | movement which arises at the time of completion | finish of water supply of 3rd Example of this invention is demonstrated.

  Hereinafter, preferred embodiments of the present invention will be described.

Example 1
This embodiment exemplifies a pure water supply container that supplies pure water by manually crushing a plastic container having elasticity that can be restored, such as polyethylene, as shown in FIG. 3 as a conventional example. In the following description, the same reference numerals are used for portions corresponding to those in FIG. As shown in FIG. 1, the pure water supply container (or bottle) of this embodiment includes a flexible crushable polyethylene container main body 5A, and a polyethylene cap 4A that can be hermetically attached to and detached from the upper diameter portion of the polyethylene cap with a screw. The polyethylene tube 1A is provided with a jet nozzle 2A, and the polyethylene tube 1A is fixed or slidably held by the tube holding portion 4B of the cap 4A, and the other end opening of the tube 1A is formed at the bottom of the container body 5A. It arrange | positions and 10A of pure waters can be attracted | sucked.

A check valve 16B is provided at an arbitrary position in the vertical portion of the tube 1A. Thereby, pure water can always flow in the discharge direction.
Further, the filter 23 is attached by screwing or the like to the upper shoulder portion of the cylindrical wall portion of the container body 5A and above the pure water storage portion. Details of the filter 23 will be described later with reference to FIG.
To explain the operation during use, if the container main body 5A of the pure water supply container having this structure is gripped and crushed by hand, the internal pressure in the container is increased and the pure water is discharged from the nozzle 2A through the tube 1A. The
At the end of the water supply, the container body 5A is restored by its own elasticity. At that time, the internal pressure in the container is lowered, so that the water and air in the tube 1A try to flow backward, but the check valve 16B closes so that the reverse flow occurs. Is blocked. At the same time, clean air is taken into the container through the filter 23. Further, when the internal pressure of the container body rises, clean air may leak outside through the filter. Therefore, a check valve similar to that of the third embodiment is provided in the air intake passage.

Example 2
This embodiment is an example related to a trigger type pure water supply container similar to that described in Patent Document 2. As shown in FIG. 2, the trigger-type pure water supply container is composed of a somewhat rigid plastic container body 1 and a trigger-type ejector body 2 attached to the upper part thereof. The container body 1 has a trunk portion 3 and an upper shoulder portion thereof. 4 of the neck portion 5 with a screw at the upper end. The trigger-type ejector main body 2 includes a cylindrical base 6 on the lower surface of the main body 2a, and a lower portion of the cylindrical base 6 is fixed to the cylindrical body 10. The cylindrical body 10 has an outward flange 9 connected to the above-mentioned screwed neck portion. It is fixed to the container body 1 by an inward flange 7 of the mounting cylinder 8 having a screw that is screwed to the screw 5. A tube fitting cylinder 13 hangs down as a pure water suction passage with a suction valve 12 for sending liquid into the pump chamber of the main body 2a in the cylindrical base 6, and a connector 14 is attached to the fitting cylinder 13. A suction tube 15 is connected to the connector 14, and the connector 14 is provided with a check valve 16B.
A filter 23 is hermetically attached to the shoulder 4 of the container body 1 by screws or other fixing means.
In the above configuration, the liquid is sucked into the tube 15 from the bottom of the body portion 3 of the container body 1 by the operation of the trigger 19 and sent into the ejector body 2 through the check valves 16B and 12, and is sucked by the repeated operation of the trigger. The purified water is pressurized and ejected from the tip of the nozzle 2b. At this time, outside air is sucked into the container body 1 through the filter 23. Thus, the liquid can be easily supplied while preventing the reverse flow of pure water.
In this type of container, it is not necessary to provide a check valve especially in the air intake passage where the filter 23 is installed. However, in order to prevent clean air from leaking to the outside when the internal pressure of the container body rises due to a temperature rise or the like, A check valve similar to that of the third embodiment is provided in the air intake passage.

Structure of the filter will now be described filter used in Examples 1 and 2. FIG. 5 is a sectional view showing details of the filter 23 used in the present invention. However, the use of some constituent layers can be omitted depending on the impurity concentration of pure water. FIG. 5 shows the most preferred embodiment.
The filter 23 includes a first perforated support plate 25 having a large number of openings 26, a hydrophobic filtration membrane 27 for removing particles, and an activated carbon layer 28 for adsorbing organic matter, which are sequentially stacked from the inside of the pure water supply container. The carbon dioxide absorbing layer 29 and the second perforated support plate 30 having a large number of openings 31 are supported by the outer frame 32. For example, a male screw 33 is formed on the outer wall of the outer frame, which is the opening 24 formed on the shoulder of the outer wall of the container body 5A of the polyethylene pure water supply container in the embodiment of FIG. 1, or the trigger of FIG. It is screwed into the inner thread of the peripheral wall 34 provided in the opening 24 formed in the shoulder portion 4 of the pure water supply container, and the periphery of the filter is kept airtight.
The first and second perforated support plates 25 and 30 can satisfy these conditions by appropriately adjusting the size and number of the openings 26 and 31 in advance so that the layers in contact with the first and second perforated support plates 25 and 30 can indicate the layer and have sufficient air permeability. That's fine.
The hydrophobic filtration membrane 27 is preferably a porous membrane having an average pore diameter of about 0.1 to 1.0 μm, more preferably about 0.2 to 0.5 μm, and can remove airborne particles. The material of the filtration membrane 27 is manufactured from a hydrophobic filtration membrane so that the water inside the vessel does not leak outside when the vessel is lit or laid down during use. As a material of such a hydrophobic filtration membrane, a hydrophobic resin such as PVDF (polyvinylidene fluoride), PTFE (polytrifluoroethylene), or PC (polycarbonate), PP (polypropylene) subjected to hydrophobic treatment, Known resins such as PA (polyamide) and PS (polysulfone) can be used.
The adsorption layer 28 is preferably an activated carbon layer and adsorbs organic solvents, environmental hormones and other volatile organic substances present in the air. Activated carbon is preferred because it is inexpensive and adsorbs a wide variety of organic substances that may be present in the air.
The carbon dioxide absorption layer preferably contains slaked lime Ca (OH) ₂ as a main component. Since slaked lime absorbs carbon dioxide gas, contamination of pure water by carbon dioxide gas is prevented, and the limit of the filter can be detected with the naked eye because it reacts with carbon dioxide gas and turns blue. The second perforated support plate 30 is transparent so that the discoloration of the Ca (OH) ₂ can be observed.

Example 3
This embodiment is another implementation of a pure water supply container of the type illustrated in FIG. 1 in which pure water is supplied by manually crushing the body of a plastic container having flexibility and resilience, such as polyethylene. An example is illustrated.
As shown in FIG. 6, the pure water supply container (bottle) of this embodiment includes a container main body 105, a polyethylene cap 104 that can be hermetically attached and detached with a screw (not shown) at the upper diameter portion thereof, The polyethylene tube 101 is provided with a water mouth (spout nozzle) 102, and the polyethylene tube 101 is fixed or slidably held by the tube holding portion 103 of the cap 104. The other end opening of the tube 101 is connected to the container main body 105. It arrange | positions at the bottom and enables the suction of the pure water L (refer FIGS. 7-8).

A check valve 116 that allows a one-way flow in the direction of supplying pure water is provided at an arbitrary position (a lower end portion in this example) of the vertical portion of the tube 101. When the container main body 105 of the pure water supply container having this structure is gripped and crushed by hand, the internal pressure of the air portion in the bottle is increased and pure water is discharged from the water inlet 102 through the tube 101.
Further, an air intake port 106 is provided at the top of the cap 104, and a check valve 107 is attached to the air inlet 106 to allow a one-way flow of air into the container. Further, a filter 123 is held inside the cap 104. The details of the filter 123 may be the same as those described with reference to FIG. 5, but in this embodiment, only the hydrophobic filtration membrane 127 and the adsorbent 128 are accommodated. A perforated support plate 125 is provided on the lower surface of the hydrophobic filtration membrane 127 to reinforce the filter.

The operation of the water supply container (bottle) according to this embodiment is the same as that of the first embodiment. However, since the check valve 107 is added, clean air in the container does not leak to the outside. The service life is extended and replacement costs can be reduced.
To explain the operation, as shown in FIG. 7, when water supply is required, if the container body 105 is gripped by hand as shown by the arrow and crushed to a desired level, the internal pressure in the container body increases and Water is sent through the tube 101 and discharged from the water inlet 102. During this water supply time, the check valve 107 that closes with the internal pressure at the time of supplying pure water acts, so that clean air in the container does not leak to the outside.
At the end of water supply, as shown in FIG. 8, the container body 105 is restored by its own elasticity. At that time, since the internal pressure of the air portion in the container is lowered, water and air in the tube 101 try to flow backward, but the check valve 116 is closed so that the reverse flow is prevented. On the other hand, since the check valve 107 provided at the air intake port 106 is opened, the outside air is cleaned when passing through the filter 123 and then sucked into the container body 105 as indicated by an arrow A.

As described above, according to the present invention, the filter is attached to the wall or cap above the pure water storage part of the container body of the manual pure water supply container, and the check valve is attached to the supply tube together with the filter. Therefore, the check valve opens during water supply and water supply is performed smoothly, and the internal pressure of the container decreases when the water supply is stopped, so the outside air is purified and taken into the container through the filter, and at the same time, the check valve is closed. The possibility that the outside air flows back into the container via the discharge nozzle is prevented.
Further, when the check valve is also used in the air intake passage where the filter is arranged as in the third embodiment, the clean air in the container is prevented from flowing out to the outside air, so that the life of the filter Becomes longer. And the filter can remove any one or more of dust, organic matter, and carbon dioxide floating in the air, and it can know the limit of use of the filter by using slaked lime to remove carbon dioxide. Become.

DESCRIPTION OF SYMBOLS 1A, 101 Polyethylene tube 2A, 102 Injection nozzle or water injection port 4A, 104 Cap 5A, 105 Container body 16B, 116 Check valve 1 Container body 2 Trigger type ejector body 3 Body part 4 Shoulder part 5 Threaded neck part 6 Tubular base 12 Suction valve 13 Tube fitting cylinder 14 Connector 15 Suction tube 23, 123 Filter 25, 125 First perforated support plate 26, 31 Multiple openings 27, 127 Hydrophobic filtration membrane 28, 128 for particle removal Adsorption Agent layer 29 Carbon dioxide absorbing layer 30 Second perforated support plate 32 Outer frame 33 Male screw 34 Perimeter wall

Claims (7)

A plastic container main body having a cylindrical wall portion and a top opening; a lid portion hermetically attached to the top opening; a pure water supply tube extending through the lid into the container main body; , a pure water supply container and a discharge nozzle connected to an upper end of the deionized water supply tube mounted on top of the lid,
An upper position than that of pure water containing portion of the tubular wall portion, the air intake passage for taking outside air when pure water supply provided, the when the air intake passage becomes high internal pressure inside the filter and the container body A non-return valve for closing the air intake passage, and a non-return valve in the supply tube. The filter is characterized by a hydrophobic filtration membrane for removing fine particles, an adsorbent layer for organic matter adsorption, A pure water supply container comprising a superposed body with a discolorable carbon dioxide absorption layer made of Ca (OH) ₂ and a transparent peripheral wall surrounding the superposed body .   The pure water supply container according to claim 1, wherein the cylindrical wall portion can be elastically crushed by a hand, and an upper end of the pure water supply tube and the discharge nozzle are directly connected in an airtight manner.   2. The pure water supply container according to claim 1, wherein a trigger type suction and delivery mechanism is disposed between the upper end of the pure water supply tube and the discharge nozzle. The pure water supply container according to any one of claims 1 to 3 , wherein the hydrophobic filtration membrane has an average pore diameter of 0.1 to 1.0 µm. The pure water supply container according to any one of claims 1 to 4 , wherein the filter has a first perforated support plate on the pure water storage portion side of the container main body. The filter pure water supply container according to any one of claims 1 to 5 having a second perforated support plate on the outside of the container body. The pure water supply container according to any one of claims 1 to 6 , wherein the adsorbent layer for organic substance adsorption is an activated carbon layer .

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