JP2003088738A - Carbonated warm water production apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus which can dissolve carbon dioxide gas in warm water to about the carbon dioxide gas saturation concentration, especially one which can dissolve a carbon dioxide gas to a high concentration even when water is caused to pass through it only once. SOLUTION: In this apparatus for producing carbonated warm water by dissolving carbon dioxide gas, a degassing module for removing a dissolved gas from warm water by using a membrane is arranged at the former step of a carbon dioxide gas addition module, or a degassing module is arranged at the former step of a membrane-type carbon dioxide gas addition module for adding a carbon dioxide gas by using a gas permeable membrane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbonated hot water producing apparatus for dissolving carbon dioxide gas in hot water. More specifically, the present invention relates to a 1-pass water-flowing carbonated hot water production apparatus capable of achieving high concentration and high dissolution efficiency with a simple apparatus configuration.

[0002]

2. Description of the Related Art Vasodilatory effects when bathed in hot water containing carbon dioxide gas such as carbonated springs and hot bath effects such as difficulty in cooling with hot water are generally well known, and there are drugs and devices that can easily obtain carbonated water for bathing. It is commercially available. In recent years, several hundred p
A therapeutic effect at a high concentration of pm to about 1000 ppm is being proven. Further, it is becoming clear that a more remarkable effect can be expected when the temperature of the carbonated hot water is about 1200 ppm and the saturated concentration of carbon dioxide is about 40 ° C.
There is an increasing need for an apparatus for easily and efficiently obtaining high-concentration carbonated water having a concentration of pm or higher.

A device for directly blowing carbon dioxide gas into a pipe having a throttle in order to artificially obtain warm carbon dioxide water containing such carbon dioxide gas is disclosed in JP-A-5-238928, and a hollow fiber membrane having both ends opened. A method using a hollow fiber membrane module containing a plurality of hollow fiber membranes and a porous hollow fiber membrane as the hollow fiber membrane is disclosed in Japanese Patent No. 2810694, and a non-porous hollow fiber membrane is used as the hollow fiber membrane. Method No. 30
It is described in each publication such as 48499 publication and Japanese Patent No. 3048501 publication.

Furthermore, a method and an apparatus for dissolving carbon dioxide gas in water after removing gas dissolved in water is disclosed in JP-A-5-23150, and a method for selectively removing only the target dissolved gas is disclosed in JP-A-5-23150. It is described in JP-A-7-60082, JP-A-7-80205 and the like. It is difficult to dissolve carbon dioxide gas with high concentration and high efficiency by the device described in JP-A-5-238928, which blows carbon dioxide gas directly into a pipe having a throttle. In addition, the method described in Japanese Patent No. 2810694 using a porous hollow fiber membrane, Japanese Patent No. 3048499 using a non-porous hollow fiber membrane, and Japanese Patent No. 3048501 high efficiency, high efficiency. It is possible to dissolve carbon dioxide gas in warm water with, but it is difficult to dissolve warm carbonated water near the saturated concentration with a dissolution efficiency close to 100%. Further, in Japanese Patent No. 2810694 using a porous hollow fiber membrane, it is clear that the membrane becomes hydrophilic and causes water leakage after long-term use, and in applications using high temperature water, the membrane becomes hydrophilic. The risk of water leakage is more pronounced.

On the other hand, the method and apparatus for dissolving carbon dioxide gas in water after removing the gas dissolved in the water described in JP-A-5-23150, JP-A-7-60082 and JP-A-7-80205. However, all of them are related to the technology of dissolving carbon dioxide in water having a water temperature of not higher than room temperature to 0 ° C. and are insufficient for dissolving carbon dioxide in warm water.

[0006]

With the above-mentioned known techniques, it has been difficult to dissolve a high concentration of carbon dioxide gas in high temperature water with high efficiency. , Ie. An object of the present invention is to provide a device that dissolves carbon dioxide in high-temperature water up to near the saturated concentration of carbon dioxide in a high-temperature water, and in particular, a device that dissolves carbon dioxide at high concentration even in one-pass water passage. is there.

[0007]

A first gist of the present invention is a carbonated hot water producing apparatus for obtaining carbonated hot water by dissolving carbon dioxide gas, wherein hot water dissolved gas is introduced through a membrane in front of a carbon dioxide gas addition module. The apparatus for producing carbonated hot water is characterized in that a deaeration module for removing is removed.

The deaeration module referred to herein is preferably a deaeration module which allows hot water to pass through one space through the membrane and decompresses the other space. As the decompression means, a water-sealed vacuum pump, Alternatively, a device such as an aspirator or a Venturi tube that generates a negative pressure by a water flow can be used. When a device for generating a negative pressure by a water flow is used as the decompression means, it is possible to use hot carbonated water in which water passed through the decompression device flows in a flow path after the carbon dioxide gas addition module of the carbonated hot water producing device.

In the depressurizing means used in the present invention, since hot water is deaerated, a large amount of water vapor permeates to the depressurizing side, so that in an oil rotary type vacuum pump or diaphragm pump generally used,
The initial degree of vacuum may not be obtained due to the inclusion of water in the oil, rusting of metal members in the vacuum chamber, deterioration of the diaphragm, etc. It is preferable to use a vacuum pump capable of stably maintaining the temperature for a long period of time, for example, a water-sealed vacuum pump that uses water as a sealing liquid, or a device that generates a negative pressure by a water flow such as an aspirator or a Venturi tube. In particular, when using an aspirator, a Venturi tube, etc., by disposing the aspirator, the Venturi tube, etc. in the hot water pipe after the carbon dioxide gas addition section, it is not necessary to specially provide a water flow path for the pressure reducing means, and the device is simple Is highly preferred.

The gas permeable membrane used in such a degassing module has an oxygen permeation amount of 5 × 10 ^{−3 at} 25 ° C.
It is preferably m ³ / m ² · hr · 0.1 MPa or more. The amount of oxygen permeation is 5 × 10 ⁻³ m ³ / m ² · hr ·
If it is less than 0.1 MPa, a large amount of gas permeable membranes necessary for removing the dissolved gas contained in water are required, which is not preferable because the apparatus becomes large and the cost becomes high. Here, the amount of oxygen permeation means the volume of oxygen gas permeating through the membrane per unit area and unit time when a partial pressure differential pressure of 0.1 MPa is applied between the membranes in an ambient temperature of 25 ° C. . In particular, it is preferable that this gas permeable membrane is a non-porous membrane.

The second gist of the present invention is a carbonated hot water producing apparatus for obtaining carbonated hot water by dissolving carbon dioxide gas, which is provided before the membrane type carbon dioxide gas addition module for adding carbon dioxide gas through a gas permeable membrane. A carbonated hot water producing apparatus characterized in that a deaeration module is provided.

The carbon dioxide gas permeation amount at 25 ° C. is 1 × 10 ⁻³ to 1 m ³ / m ² · hr · 0.1 MPa, and the water vapor permeation amount at 25 ° C. is 1 × 10 ⁴ g /
It is preferable to use a membrane-type carbon dioxide gas addition module using a gas permeable membrane having m ² · hr · 0.1 MPa or less. The film density of the gas-permeable film in the film-type carbon dioxide gas addition module is preferably 2000 to 7000 m ² / m ³ . It is preferable that the gas permeable membrane is a hollow fiber membrane and is a non-porous membrane having no Knudsen flow, and the thickness of the non-porous membrane is 0.1 to 500 μm.

The carbon dioxide hot water producing apparatus thus obtained can dissolve carbon dioxide gas with high concentration and high efficiency even with one-pass water passage. Here, the warm water is water at a temperature at which it does not cause discomfort when it comes into contact with the skin.
Water with a water temperature near 0 ° C. The high concentration means a concentration around the saturated solubility of carbon dioxide gas at the temperature of the treated water, and the high efficiency means that 90% or more of the carbon dioxide gas added to the water is dissolved in the water and the amount released to the gas phase is 10%. It means the following.

Further, when the degassing module and the carbon dioxide gas adding module of the present invention use a non-porous membrane having substantially no gas-permeable communication holes, water leakage occurs even after long-term use. It's good because things are gone. Furthermore, the sandwich structure in which both sides of the non-porous material are sandwiched between the porous materials can strengthen the mechanical strength even if the non-porous film is made thin, and the non-porous film becomes thinner. Therefore, the gas permeation rate is high, and the required membrane area can be reduced, which is very preferable. Furthermore, by forming the non-porous membrane into a hollow fiber membrane shape, the volume efficiency in the module is improved and the module can be downsized, which is very preferable.

The gas permeable membrane used in the present invention includes:
Carbon dioxide permeation amount at 25 ° C. is 1 × 10 ⁻³ to 1 m ^3.
/ M ² · hr · 0.1 MPa is preferable. If the carbon dioxide gas permeation amount is lower than 1 × 10 ⁻³ m ³ / m ² · hr · 0.1 MPa, carbon dioxide gas cannot be efficiently dissolved in water, and 1 m ³ / m ² · hr · 0.1 MPa. If it is higher than the above value, carbon dioxide gas permeates a large amount at a low pressure, and the permeation amount greatly changes even with a small pressure fluctuation, which is not preferable.

Further, the gas permeable membrane used in the present invention is
Water vapor transmission rate at 25 ° C is 1 × 10 ⁴ g / m ² · h
It is preferably r · 0.1 MPa or less. If the amount of water vapor permeation is higher than 1 × 10 ⁴ g / m ² · hr · 0.1 MPa, it is necessary to discharge the drain out of the membrane module frequently, which is not preferable. Also, the carbon dioxide permeation rate is 1
× 10 ^-2 to ^{1x10 -1} m ³ / m ² · hr · 0.1M
Pa, water vapor transmission rate of 1 × 10 ³ g / m ² · hr ·
It is more preferably 0.1 MPa or less, and particularly preferably 1 × 10 ² g / m ² · hr · 0.1 MPa or less as a water vapor transmission amount.

Here, the water vapor permeation amount and the carbon dioxide gas permeation amount refer to the membrane per unit area and unit time when a partial pressure differential pressure of 0.1 MPa is applied between the membranes at an ambient temperature of 25 ° C. It refers to the weight of water vapor and the volume of carbon dioxide gas.

Conventionally, a membrane used to dissolve carbon dioxide gas in water has a high carbon dioxide gas permeation rate and a high water vapor permeation rate at the same time. Therefore, the drain is frequently used outside the membrane module. If it is not discharged into the tank, the dissolution efficiency of carbon dioxide cannot be maintained, and this problem was remarkable especially in the case of hot water.

The gas permeable membrane used in the degassing module or the carbon dioxide gas adding module of the present invention does not have a Knudsen flow, which is not likely to cause water leakage due to the membrane becoming hydrophilic due to long-term use. It is preferably a non-porous film.

The thickness of the non-porous film is 0.1 μm to 50 μm.
It is preferably in the range of 0 μm. Transmembrane pressure is 0.1μ
When it is thinner than m, it becomes difficult to manufacture and handle the membrane, and when the membrane pressure is thicker than 500 μm, the amount of water vapor permeation decreases but the amount of carbon dioxide gas permeation also decreases. This is not preferable because it requires the film area.

The shape of the gas permeable membrane is not particularly limited, and it may be formed into a hollow fiber membrane shape, a flat membrane shape, or any other desired shape, if necessary. The hollow fiber membrane shape is preferable because it can increase the membrane area per unit volume.

It is possible to use the non-porous film alone depending on the strength, rigidity and film thickness of the material of the gas permeable film. However, when the film thickness is thin or to protect the film surface, for example, a flat film shape is used. If it is, it is possible to use a reinforcing porous body as a spacer, and for example, in the case of a hollow fiber membrane shape, a support for supporting the hollow fiber membrane on the inner surface and / or the outer surface. It is also possible to provide a layer to form a film having a multi-layer structure, and the film can be selected appropriately.

FIG. 6 shows an example of a preferred shape of the membrane used in the present invention, which is a composite hollow fiber membrane having a three-layer structure in which a porous layer 68 is disposed on both surfaces of a non-porous layer 69. When such a composite hollow fiber membrane is used, since both sides of the gas permeable non-porous membrane are protected by the porous layers, it may come into direct contact with the non-porous membrane during handling such as processing and use. It is possible to prevent the membrane from being damaged or contaminated, and to provide a hollow fiber membrane having excellent mechanical strength.

Examples of materials for the gas permeable membrane of the present invention include segmented polyurethane and non-porous membranes made of a polymer blend of styrene thermoplastic elastomer and polyolefin. More specifically, the styrene-based thermoplastic elastomer is an (S)-(EB)-(S) triblock copolymer comprising a styrene polymer (S) and a polymer (EB) obtained by hydrogenating a butadiene polymer. Alternatively, a non-porous film that is a (S)-(BU)-(S) triblock copolymer composed of a styrene polymer (S) and a butadiene polymer (BU), or a styrene-based thermoplastic elastomer is styrene. A polymer obtained by hydrogenating a random copolymer composed of a monomer and a butadiene monomer, or
Examples thereof include random copolymers of styrene monomer and butadiene monomer.

The composition ratio of the styrene thermoplastic elastomer and the polyolefin is preferably 20 to 95 parts by mass of the styrene thermoplastic elastomer and 80 to 5 parts by mass of the polyolefin, based on 100 parts by mass of both components. It is more preferable that the thermoplastic elastomer is 40 to 90 parts by mass and the polyolefin is 60 to 10 parts by mass.

When the composite hollow fiber membrane is used, the polymer material constituting the porous layer is a polyolefin-based polymer such as polyethylene, polypropylene, poly (3-methylbutene-1), poly (4-methylpentene-1), Fluorine-based polymers such as polyvinylidene fluoride and polytetrafluoroethylene, and polymers such as polystyrene, polyether ether ketone, and polyether ketone can be used.

As the film forming method, a known film forming method can be appropriately used depending on the moldability and shapeability of the material. For example, in the case of forming a hollow fiber membrane shape, the raw material of the carbon dioxide gas-added membrane may be extruded in a molten state from the hollow die, cooled, and wound up, and then formed according to a conventionally known method.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail. FIG. 1 is a process diagram showing a flow of a method for producing carbonated hot water according to the present invention. The temperature of the water is appropriately adjusted by a water heater (not shown) or the like, and the water is supplied to the degassing module. The degassing module unit is composed of a degassing unit that allows hot water to pass through one space through a gas permeable membrane and depressurizes the other, and oxygen and nitrogen contained in the hot water are removed. The degassed water from which oxygen and nitrogen are removed in the degassing module unit is further supplied to the carbon dioxide gas addition module unit to dissolve the carbon dioxide gas supplied from the carbon dioxide gas supply source, and is supplied to the user as carbonated hot water. Here, the carbonated warm water supplied to the user can be supplied by a suitable method such as supplying it to a container such as a bathtub or a footbath, or supplying it as a shower, depending on its use form.

The deaeration module and the carbon dioxide gas addition module used in the method for producing carbonated hot water according to the present invention may have different structures, but if they have the same structure, the module can be manufactured at low cost.

FIG. 2 is a view showing an example of the degassing module or the carbon dioxide gas adding module. A plurality of hollow fiber membranes 3 supported and fixed by a potting material 2 while keeping the open state at both ends are arranged in the housing 1, and each of the space having the inner surface and the space having the outer surface of the hollow fiber membrane is provided. Openings 4, 5, 6, 7 to allow fluid to pass through
Are arranged.

Here, in the case of an internal perfusion type degassing module in which hot water is passed through the hollow fiber and the outside of the hollow fiber is depressurized, the openings 4 and 5 serve as inlets and outlets of the hot water, The opening 6 or the opening 7 serves as a pressure reducing port.

In the case of an internal perfusion type carbon dioxide module in which warm water is passed through the hollow fiber and the outside of the hollow fiber is pressurized with carbon dioxide, the openings 4 and 5 serve as inlets and outlets for the hot water, The opening 6 or the opening 7 serves as a carbon dioxide gas supply port. Further, in the case of an external perfusion type degassing module or a carbon dioxide gas addition module in which hot water is passed to the outside of the hollow fiber to depressurize or pressurize carbon dioxide gas inside the hollow fiber, the opening 6
The opening 7 serves as an inlet and outlet for hot water, and the opening 4 or 5 serves as a decompression port or a carbon dioxide gas supply port.

As described above, by making the degassing means and the carbon dioxide gas adding section have the same structure, it is possible to reuse each member and the like, and it is possible to reduce the apparatus manufacturing cost.

Further, in the case of a carbon dioxide gas module having a structure as shown in FIG. 2, the condensed water of water vapor which has permeated through the hollow fiber membrane is passed through the opening 4 or 7 located at the lower part of the carbon dioxide gas addition module. It can be used as a drain outlet for discharging. By doing so, it is possible to prevent the effective surface area of the membrane from being blocked by the condensed water of water vapor, and to prevent the amount of carbon dioxide gas added from decreasing, which is very preferable.

FIG. 3 is a diagram showing an example in which the degassing module and the carbon dioxide gas addition module have the same structure by using the aspirator 30 as the pressure reducing means of the carbon dioxide hot water producing apparatus according to the present invention. This figure shows an example of adopting an internal perfusion type water-flowing method in which water is passed inside the hollow fiber membrane, but in order to prevent air bubbles from staying inside the hollow-fiber membrane module, It is preferable to provide piping to allow water to pass through.

Degassing Module The opening 4 in FIG. 2 is used as the hot water inlet 14, and the opening 5 in FIG. 2 is used as the degassed water outlet 15. The opening 6 or the opening 7 in FIG. 2 is used as the intake port 16 and is connected to the aspirator 30. Further, in the carbon dioxide gas addition module, the opening 4 in FIG. 2 is used as the degassed water inlet 24, and the opening 5 in FIG. 2 is used as the carbonated warm water outlet 25. The opening 6 in FIG. 2 is connected to a carbon dioxide gas supply source 32 such as a carbon dioxide gas cylinder as a carbon dioxide gas supply port 26, and the opening 7 in FIG.
Is the drain outlet 27. Also, the drain outlet 2
7 is provided with an on-off valve 31 such as a ball valve and a solenoid valve,
The drain outlet can be opened or closed manually or automatically so that the drain can be discharged.

The degassing module and the carbon dioxide gas adding module can be connected vertically as shown in FIG. 3, or can be arranged side by side with a rectangular pipe or a flexible pipe. .

The gas phase side of the degassing module is decompressed by the suction pressure generated by the warm carbon dioxide flowing through the aspirator, and the dissolved gas such as oxygen and nitrogen in the water and the water vapor which have permeated the gas permeable membrane are mixed into the warm carbonate water by the aspirator. To be done. Further, carbon dioxide gas is supplied from a carbon dioxide gas supply source such as a carbon dioxide gas cylinder to the carbon dioxide gas addition module, and the carbon dioxide gas is added to the deaerated warm water. That is, with such a configuration, it is possible to increase the concentration and efficiency of carbon dioxide addition in warm water.

The present invention will be specifically described below based on examples. <Example 1> A composite hollow fiber membrane having a three-layer structure shown in Fig. 6 was obtained in which segmented polyurethane was used as the material of the non-porous membrane and polyethylene was used as the material of the porous membrane. The oxygen permeation amount of the obtained composite hollow fiber membrane was 2 × 10 ^−2.
m ³ / m ² · hr · 0.1 MPa, carbon dioxide permeation amount is 3 × 10 ⁻¹ m ³ / m ² · hr · 0.1 MPa, water vapor permeation amount is 7 × 10 ³ m ³ / m ² · hr ・ 0.1MPa
Met. Using this composite hollow fiber membrane, a composite hollow fiber membrane module having a membrane area of 34 m ² as a deaeration module and a composite hollow fiber membrane module having a membrane area of 0.6 m ² as a carbon dioxide gas addition module were produced, and the roots were used as a decompression means. Type vacuum pump FT3-350NY (vacuum pump manufactured by Anlet Co., Ltd., exhaust speed 6.5 m ³ / min),
An apparatus for producing carbonated hot water was produced. 1. Change the vacuum degree of the degassing module, and let warm water of 40 ° C. flow at 5 L / min through this device, and then add carbon dioxide gas into the water from the carbon dioxide gas supply module.
5 L / min, 3.0 L / min, 3.8 L / min were added, and the results of measurement of dissolved oxygen concentration on the degassing module outlet side, carbon dioxide concentration on the carbon dioxide addition module outlet side, and carbon dioxide gas dissolution efficiency are shown. 4 and FIG. Further, Table 1 shows the carbon dioxide gas flow rates and the carbon dioxide gas concentrations when the dissolution efficiency is 100%.

[0040]

[Table 1]

<Example 2> A film area of 0.6 produced in Example 1 as a degassing module and a carbon dioxide gas adding module
Using the composite hollow fiber membrane module of m ^{2 and} an aspirator (Metal Aspirator made by Inei Seieidou Co., Ltd.) as a depressurizing means, a carbonated hot water producing apparatus shown in FIG. 3 was produced. Warm water of 40 ° C at 5 L / min was passed through this device,
Dissolve carbon dioxide in water from the carbon dioxide supply module at 3.0 L / min so that the efficiency is 1200 ppm at 100%
Table 2 shows the results of measuring the carbon dioxide gas concentration and the carbon dioxide gas dissolution efficiency on the outlet side of the carbon dioxide gas addition module.

Comparative Example 1 As in Example 2 except that the pipe between the aspirator and the degassing module of the carbonated hot water producing apparatus used in Example 2 was removed and the gas phase side of the degassing module was not depressurized. Carbonated hot water was obtained in the same manner. Table 2 shows the results of measuring the carbon dioxide gas concentration and the carbon dioxide gas dissolution efficiency on the outlet side of the carbon dioxide gas addition module at this time.

[Table 2]

[0043]

According to the apparatus for producing carbonated hot water according to the present invention, the hot water supplied from the water heater or the like is circulated by degassing the dissolved gas in the hot water to a saturation concentration or less before adding the carbon dioxide gas. It is possible to obtain hot carbonated water having a saturated concentration of carbon dioxide gas by one-pass water passage without the need for the operation and circulation device. Further, by using the water-sealed vacuum pump as the depressurizing means at the time of degassing, it is not necessary to take measures against the steam condensed water accumulated in the degassing module, and the labor of operation and maintenance can be saved. Further, when the aspirator is used as the pressure reducing means and the pressure is reduced by the suction pressure generated by the water flow of the warm carbonated water, there is no need for electric power or water piping for driving the vacuum pump, and the structure is low-cost and simple. A carbonated hot water producing apparatus can be provided.

[Brief description of drawings]

FIG. 1 is a process diagram showing a flow of a method for producing carbonated hot water according to the present invention.

FIG. 2 is a sectional view showing an example of a degassing module and a carbon dioxide gas addition module used in the method for producing carbonated hot water according to the present invention.

FIG. 3 is a schematic view showing an example of the case where an aspirator is used as a decompression unit of the carbonated hot water producing apparatus according to the present invention.

FIG. 4 is a diagram showing the relationship between the dissolved oxygen concentration on the outlet side of the degassing module and the carbon dioxide concentration on the outlet side of the carbon dioxide gas addition module according to the first embodiment.

5 is a diagram showing the relationship between the dissolved oxygen concentration on the outlet side of the degassing module and the carbon dioxide gas dissolution efficiency on the outlet side of the carbon dioxide gas addition module according to Example 1. FIG.

FIG. 6 is a cross-sectional view showing an example of a gas permeable membrane used in the degassing module or the carbon dioxide gas addition module of the present invention.

[Explanation of symbols]

1 housing 2 potting material 3 hollow fiber membranes 4, 5, 6, 7 openings 14 Hot water inlet 15 Degassed water outlet 16 air intake 24 Degassed water inlet 25 Carbonated hot water outlet 26 Carbon dioxide gas supply port 27 Drain outlet 30 Aspirator 31 on-off valve 32 Carbon dioxide gas supply source 69 Non-porous layer 68 Porous layer

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01F 5/00 B01F 5/00 Z C02F 1/20 ZAB C02F 1/20 ZABA F term (reference) 4C094 BC30 DD06 EE16 GG03 4D006 GA35 HA01 KE03R MA01 MA31 MB03 PB07 PB64 PB65 PC56 4D011 AA16 AA17 AD03 4D037 AA09 AB11 BA23 BB03 BB07 4G035 AA05 AC26 AE13

Claims (15)

[Claims] 1. A carbon dioxide hot water production apparatus for obtaining carbon dioxide hot water by dissolving carbon dioxide gas, wherein a degassing module for removing dissolved gas of hot water through a membrane is arranged in front of a carbon dioxide gas addition module. An apparatus for producing carbonated hot water, which is characterized in that 2. Hot water is passed through one space through the membrane,
The carbonated hot water producing apparatus according to claim 1, which is a deaeration module for decompressing the other space. 3. The carbonated hot water producing apparatus according to claim 2, wherein a water-sealed vacuum pump is used as the pressure reducing means. 4. The carbonated hot water producing apparatus according to claim 2, wherein the depressurizing means is an aspirator, a Venturi tube or the like which generates a negative pressure by a water flow. 5. The carbonated hot water flowing through the flow path after the carbon dioxide gas addition module of the carbonated hot water producing apparatus, wherein the water passed through the apparatus for generating a negative pressure by the water flow which is the depressurizing means. Carbonated hot water production apparatus according to 4. 6. The oxygen permeation amount at 25 ° C. is 5 × 10.
The carbonated hot water producing apparatus according to any one of claims 1 to 5, wherein a degassing module using a gas permeable membrane having a pressure of ^-3 m ³ / m ² · hr · 0.1 MPa or more is provided. 7. The carbonated hot water producing apparatus according to claim 1, wherein the gas-permeable membrane used in the degassing module is a non-porous membrane. 8. A carbon dioxide hot water production apparatus for obtaining carbon dioxide hot water by dissolving carbon dioxide gas, wherein a degassing module is provided in front of a membrane type carbon dioxide gas addition module for adding carbon dioxide gas through a gas permeable membrane. Carbonated hot water production device characterized by the following. 9. The carbon dioxide permeation amount at 25 ° C. is 1 × 1.
0^-3~ 1m^Three/ M ^Two· Hr · 0.1 MPa, and
Water vapor transmission rate at 25 ℃ is 1 × 10^Fourg / m^Two・
A membrane using a gas permeable membrane having a hr · 0.1 MPa or less
9. A carbon dioxide temperature according to claim 8, which is a type carbon dioxide gas addition module.
Water production equipment. 10. The film density of the gas-permeable film in the film-type carbon dioxide gas addition module is 2000 to 7000 m ² /
The carbonated hot water producing apparatus according to claim 8 or 9, which is m ³ . 11. The carbonated hot water producing apparatus according to claim 8, wherein the gas-permeable membrane is a hollow fiber membrane. 12. The carbonated hot water producing apparatus according to claim 8, wherein the gas-permeable membrane is a non-porous membrane having no Knudsen flow. 13. The non-porous film has a thickness of 0.1 to 50.
The apparatus for producing carbonated hot water according to claim 12, which has a diameter of 0 μm. 14. The carbonated hot water producing apparatus according to claim 1, which is a one-pass water-passing type. 15. The carbonated hot water producing apparatus according to claim 1, wherein 90% or more of carbon dioxide gas added to the warm water is dissolved in the warm water.