JPH09201182A - Storage apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage apparatus which is energized with a fuel cell and stores food, etc., in low oxygen atmosphere for suppressing the deterioration of the quality of food, etc., caused by generated water. SOLUTION: This storage apparatus is provided with a blasting fan 9 as a air-feeding means, an oxidizer pole 6, a water removing means 10 and an exhaust outlet 11, which are serially connected to each other. A tableware plate 14 is placed near the exhaust outlet 11. The oxygen in the air fed to the oxidizer pole 6 is consumed by electrochemical reaction, the water generated by the electrochemical reaction is removed in the water removing means 10, and then, the treated air is directly blasted from the exhaust outlet 11 on the objective tableware plate 14. Thus, the deterioration of the quality of food caused by the splash of the generated water is suppressed, an inert gas can be fed to the atmosphere of the objective material in a continuous manner with a simple mechanism without using a storage container, etc., and foods can be protected from oxidation and stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device for storing foods and other articles using a gas which is exhausted to a low oxygen concentration due to an oxygen reaction due to an electrochemical reaction in a fuel cell. .

[0002]

2. Description of the Related Art Conventionally, a storage device for foods and other articles using this type of electrochemical reaction has been disclosed in Japanese Patent Publication No. 57-4229. The configuration is shown below in FIG.
This will be described with reference to FIG. As shown in FIG. 7, the water-filled zinc-air battery 1 is housed inside the storage 2,
Reference numeral 3 is a bellows for avoiding a depressurized state caused by consumption of oxygen. When water is injected into the water injection type zinc-air battery 1, discharge using oxygen as a positive electrode active material is started, oxygen in the storage 2 is consumed, and a deoxidized state is obtained.
It can prevent foods from being oxidized and can be preserved. Storage 2
Is relatively large, the amount of oxygen to be deoxidized is also large. In such a case, a fuel cell in which the negative electrode active material is not incorporated inside the cell 1 but is supplied from the outside can be used.

[0003]

However, in the above-mentioned conventional configuration, when hydrogen is used as the negative electrode active material of the fuel cell and oxygen is used as the positive electrode active material of the fuel cell, the whole cell reaction results in the fuel cell. Water is generated in the oxidizer electrode and oxygen in the storage 2 is consumed, and at the same time, the generated water is scattered in the storage 2, water droplets are attached and formed on the surface of food, etc., and the storage 2 is opened and closed for continuous use. In that case, the cumulative amount of oxygen consumption in the storage 2 increases, the generated water is also stored, and a water pool is generated in the storage 2, so that the flavor of the food is impaired and the quality of the food itself deteriorates. Had challenges. Such a problem becomes more serious in the case of preservation of metal products other than foods and ancient culture materials.

The present invention solves the above-mentioned conventional problems by obtaining the power generation output by the electrochemical reaction of the fuel cell and directly blowing the exhaust gas from the oxidizer electrode having a low oxygen concentration to the target object. It is an object of the present invention to provide a storage device that can be easily used with a simple configuration that continuously realizes a low oxygen state.

[0005]

A storage device according to the present invention comprises a fuel cell having a fuel electrode and an oxidant electrode, a fuel supply means for supplying a fuel to the fuel electrode, and an air supply to the oxidant electrode. Means for supplying air, a water removing means provided in communication with the downstream side of the oxidizer electrode, and an exhaust outlet provided in communication with the downstream side of the water removing means. According to the present invention, it is possible to obtain the effect that the generated water does not scatter and the inert gas can be supplied with a simple configuration.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION To achieve the above object, the present invention has the following constitution. That is, a fuel cell including a fuel electrode and an oxidant electrode, a fuel supply unit that supplies fuel to the fuel electrode, an air supply unit that supplies air that is an oxidant to the oxidant electrode, and the oxidant. The water removing means is provided in communication with the downstream side of the pole, and the exhaust outlet is provided in communication with the downstream side of the water removing means.

As a second structure, a fuel cell having a fuel electrode and an oxidant electrode, fuel supply means for supplying a fuel to the fuel electrode, and air serving as an oxidant to the oxidant electrode. Air supply means, water removing means provided in communication with the downstream side of the oxidizer electrode, a storage provided in communication with the downstream side of the water removing means, and exhaust provided in the storage It has a structure with an exit.

As a third structure, a gas-liquid separating section having a water storage section is provided as a water removing means.

As a fourth structure, a porous permselective membrane is provided as a water removing means.

As the fifth structure, an adsorbing layer is provided as a water removing means.

As a sixth structure, an inlet valve provided on the upstream side of the storage and an outlet valve provided on the exhaust outlet of the storage are provided.

As a seventh configuration, an inlet valve provided upstream of the storage, an outlet valve provided at an exhaust outlet of the storage, and oxygen for detecting and displaying the oxygen concentration of the storage. And a density display section.

As an eighth structure, a combustion unit for combusting the fuel electrode exhaust gas discharged from the fuel electrode and the combustion unit are provided on the downstream side of the oxidizer electrode.

With the above structure, the storage device for foods and other articles of the present invention has the following functions. When air is supplied from the air supply means to the oxidizer electrode of the fuel cell and hydrogen is supplied to the fuel electrode from the fuel supply means, oxygen and hydrogen in the air are consumed by an electrochemical reaction to generate generated power. The exhaust gas discharged from the oxidizer electrode is an inert gas mainly composed of oxygen-depleted low-oxygen-concentration nitrogen, and water generated by the electrochemical reaction is removed by the water removal means on the downstream side. After that, it is blown directly from the exhaust outlet to the target object, so it is possible to prevent the deterioration of food etc. due to the scattering of generated water, and the inert gas is continuously applied to the target object with a simple configuration without using a storage container. Can be supplied to the atmosphere, and the food can be stored while being protected from oxidation.

When air is supplied from the air supply means to the oxidizer electrode of the fuel cell and hydrogen is supplied to the fuel electrode from the fuel supply means, oxygen and hydrogen in the air are consumed by an electrochemical reaction to generate power. Is obtained. The exhaust gas discharged from the oxidizer electrode is an inert gas mainly composed of oxygen-depleted low-oxygen-concentration nitrogen, and water generated by the electrochemical reaction is removed by the water removal means on the downstream side. After that, it is supplied to the storage cabinet, so it is possible to prevent the deterioration of food etc. due to the generated water splashing in the storage cabinet, and even if the storage cabinet is opened and closed frequently, the inert gas continues to flow in the storage cabinet. As a result, the food can be stored while being prevented from being oxidized.

The low-oxygen concentration exhaust gas discharged from the oxidizer electrode is bubbled in the water storage section of the gas-liquid separation section, which is a means for removing water, and then supplied to the storage. Exhaust gas with low oxygen concentration is heated by the heat generated by power generation in the fuel cell and contains water generated by the electrochemical reaction, but the exhaust gas is cooled to about room temperature when passing through the reservoir. Since the water in the exhaust gas is condensed in the water storage part and captured in the water storage part, the generated water does not accumulate in the storage and the food in the storage is not heated by the exhaust gas. Therefore, it is possible to suppress the deterioration of flavor, and it is possible to maintain, for example, cooked foods suitable for storage at room temperature in a good storage state.

The low-oxygen concentration exhaust gas discharged from the oxidizer electrode is supplied to the storage after passing through the selective permeable membrane which is a means for removing water. Exhaust gas with low oxygen concentration contains water generated by electrochemical reaction, but since the permselective membrane is provided with perforations that selectively permeate the gas, the exhaust gas supplied to the storage The water content is removed, and the exhaust gas having a low oxygen concentration is supplied to the storage with the water content removed, so that the water content can be reliably removed with a simple configuration.

Further, the low-oxygen concentration exhaust gas discharged from the oxidizer electrode is supplied to the storage after passing through the adsorption layer which is the water removing means. The low-oxygen concentration exhaust gas contains water generated by the electrochemical reaction, but since the adsorption layer is composed of a porous body having fine recesses on the surface, the water is trapped in the recesses and stored in the storage. Since the odor emitted from the food inside is also adsorbed and trapped in the recesses, the low oxygen concentration exhaust gas is supplied to the storage with moisture removed, and the odor inside the storage is also removed, so multiple The odor does not shift when foods of different types are stored, and the foods can be kept in good condition due to the low oxygen concentration atmosphere.

Further, when the fuel cell is in operation, exhaust gas having a low oxygen concentration is continuously supplied from the oxidizer electrode to the storage cabinet, and the storage cabinet is in a low oxygen state. In this case, after stopping the fuel cell, closing the inlet valve and outlet valve of the storage can seal the storage, so even when operating the fuel cell only when the generated power is required, The storage can be maintained in a low oxygen state.

Further, when the fuel cell is in operation, the exhaust gas having a low oxygen concentration is continuously supplied from the oxidizer electrode to the storage, but the oxygen concentration display for detecting and displaying the oxygen concentration of the storage is displayed. Since the user can check the oxygen concentration in the storage by the section, if the generated power is not required at all, after operating the fuel cell for a certain time until the predetermined oxygen concentration is reached, the inlet valve of the storage is Also, by closing the outlet valve, the fuel cell can be sealed in a low oxygen state, so that the consumption of fuel gas can be reduced.

Further, since the combustion section for burning the fuel electrode exhaust gas discharged from the fuel electrode is provided on the downstream side of the oxidizer electrode, when the fuel electrode exhaust gas contains unused fuel gas, Unused fuel gas can be burned in the fuel section by the exhaust gas from the oxidizer electrode, and the unused fuel gas in the fuel cell can be safely processed, and the exhaust gas with low oxygen concentration from the oxidizer electrode Since oxygen is further consumed, it is possible to promote the decrease in oxygen concentration in the storage.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a storage device for foods and other articles according to a first embodiment of the present invention.

In FIG. 1, a polymer electrolyte fuel cell 4 which is a fuel cell comprises a fuel electrode 5 and an oxidant electrode 6,
On the upstream side of the fuel electrode 5, a fuel supply unit including a source fuel cylinder 7 and a reformer 8 is provided. Oxidizer pole 6
Is provided with a blower fan 9 which is an air supply means for supplying the air of the oxidizer, and the water removing means 10 is connected to the downstream side of the oxidizer electrode 6 and the downstream side of the water removing means 10 is provided. An exhaust outlet 11 is provided in the. Reference numeral 12 is a storage battery for start-up, which includes the polymer electrolyte fuel cell 4 and the storage battery 1.
2 and the blower fan 9 are sequentially electrically connected via a lead wire 13, and the lead wire 13 is also connected to an external load (not shown). Reference numeral 14 is a tableware plate on which food is placed.

In the above structure, when electric power is supplied from the storage battery 12 to the blower fan 9 through the lead wire 13, the blower fan 9 is driven to supply air to the oxidizer electrode 6 of the polymer electrolyte fuel cell 4. It The source fuel is supplied from the source fuel cylinder 7 to the reformer 8, reformed into hydrogen gas by the reformer 8 and supplied to the fuel electrode 5 of the polymer electrolyte fuel cell 4. Oxygen and hydrogen in the air are consumed by an electrochemical reaction to obtain generated power, and the generated power other than that stored in the storage battery 12 is supplied to an external load (not shown). The exhaust gas continuously discharged from the oxidizer electrode 6 during power generation is an inert gas whose main component is oxygen-consuming low oxygen concentration nitrogen,
After the water generated by the electrochemical reaction is removed by the water removing means 10 on the downstream side, the water is blown directly from the exhaust outlet 11 to the dishware 14 that is the object, so that the generated water is scattered and the quality of the food is altered. In addition, the inert gas can be continuously supplied to the atmosphere of the object with a simple configuration without using a container for storage, and the food can be stored while being prevented from being oxidized.

FIG. 2 is a block diagram of a storage device for foods and other articles according to a second embodiment of the present invention, in which the same reference numerals as those in FIG. 1 are corresponding components, and detailed description thereof will be omitted. In FIG. 2, a storage case 15 having an opening / closing door is connected to the downstream side of the water removing means 10, and the storage case 15 is provided with an exhaust outlet 11.

In the above structure, the exhaust gas continuously discharged from the oxidizer electrode 6 during power generation is an inert gas whose main component is nitrogen of low oxygen concentration in which oxygen is consumed, and moisture on the downstream side. Since the water generated by the electrochemical reaction is removed by the removing means 10 and then supplied to the storage 15, it is possible to prevent alteration of food or the like due to scattering of the generated water in the storage 15, and thus the storage 15 Even when it is frequently opened and closed, the inert gas is continuously supplied into the storage chamber 15 and is exhausted from the exhaust outlet 11, so that the exhaust gas having a low oxygen concentration is always filled and the food or the like is not oxidized. Can be prevented and saved.

FIG. 3 is a sectional view of the essential parts of a storage device for foods and other articles according to a third embodiment of the present invention, in which the same reference numerals as those in FIGS. The description is omitted. In FIG. 3, reference numeral 16 is a gas-liquid separation unit, and a water storage unit 17 is provided therein, and an exhaust gas inlet 18 submerged in the water storage unit 17 and an exhaust gas outlet 19 at the upper surface of the gas-liquid separation unit 16 are provided. 20 is a drain valve.

In the above structure, the low-oxygen concentration exhaust gas discharged from the oxidizer electrode 6 flows into the water storage section 17 through the exhaust gas inlet 18, and in contact with the water in the water storage section 17 in the form of bubbles, heat is transferred and cooled. After that, the exhaust gas outlet 19 to the storage 15
Is supplied to. The exhaust gas having a low oxygen concentration is heated by the heat generated by the power generation in the polymer electrolyte fuel cell 4 and contains water generated by the electrochemical reaction. However, when the exhaust gas passes through the water storage section 17, Since the water in the exhaust gas is cooled to about room temperature, which is about the water temperature of the water storage unit 17, the water in the exhaust gas is condensed in the water storage unit 17 and captured in the water storage unit 17, so that the generated water may be stored in the storage case 15. In addition, since the food in the storage 15 is not heated by the exhaust gas, it is possible to suppress the deterioration of the flavor and maintain the food such as cooked food suitable for storage at room temperature in a good condition. The water trapped in the water reservoir 17 is timely discharged from the drain valve 20,
Be drained.

FIG. 4 is a sectional view of the essential parts of a storage device for foods and other articles according to a fourth embodiment of the present invention, in which the same reference numerals as those in FIGS. 1 and 2 are the corresponding structural elements. The description is omitted. In FIG. 4, an opening 21 is provided on the side surface on the upstream side of the storage 15, the selective permeation membrane 22 is disposed in close contact with the opening 21, and the upstream side of the selective permeation membrane 22 is a uniform space portion. 23, the uniform space portion 23 communicates with the oxidant electrode 6.

In the above structure, the low oxygen concentration exhaust gas discharged from the oxidizer electrode 6 diffuses into the uniform space portion 23, passes through the selective permeable membrane 22, and is then supplied to the storage 15. The exhaust gas having a low oxygen concentration contains water generated by an electrochemical reaction, but since the permselective membrane 22 is provided with a porous hole through which the gas is selectively permeated, it is supplied to the storage 15. The water in the exhaust gas is removed, and the exhaust gas with a low oxygen concentration is stored in the storage box 15 with the water removed.
Since it is supplied to, it is possible to reliably remove water with a simple configuration.

FIG. 5 is a sectional view of the essential parts of a storage device for foods and other articles according to a fifth embodiment of the present invention, in which the same reference numerals as those in FIGS. 1 and 2 are the corresponding constituent elements. The description is omitted. In FIG. 5, the adsorption layer 24 is disposed on the upstream side of the opening 21 and communicates with the downstream side of the oxidant electrode 6.

In the above structure, the low-oxygen concentration exhaust gas discharged from the oxidizer electrode 6 passes through the adsorption layer 24 and is then supplied to the storage 15. Exhaust gas with low oxygen concentration contains water generated by electrochemical reaction,
Since the adsorption layer 24 is composed of a porous body having fine concave portions on the surface, moisture is trapped in the concave portions and odor diffused from the food in the storage cabinet 15 and diffused into the storage cabinet 15 is also adsorbed and captured in the concave sections. Therefore, the low-oxygen concentration exhaust gas is supplied to the storage cabinet 15 in a state where the moisture is removed, and the odor in the storage cabinet 15 is also removed. Therefore, even if a plurality of different foods are stored, the odor is transferred. Moreover, the low oxygen concentration atmosphere allows the food and the like to be preserved in good condition.

FIG. 6 is a block diagram of a storage device for foods and other articles according to a sixth embodiment of the present invention, in which components having the same reference numerals as those in FIG. 2 are corresponding components, and detailed description thereof will be omitted. In FIG. 6, the storage box 15 is provided with an inlet valve 25 on the inlet side, an outlet valve 26 on the exhaust outlet 11 and an oxygen concentration display portion 27, and the combustion portion 28 communicates with the oxidant electrode 6 and is on the downstream side. The catalyst burner portion 29 inside the combustion portion 28 communicates with the fuel electrode 5.

In the above structure, when the polymer electrolyte fuel cell 4 is in operation, the exhaust gas having a low oxygen concentration is continuously supplied from the oxidizer electrode 6 to the storage cabinet 15 so that the storage cabinet 15 has a low oxygen content. Since the concentration becomes high and exhaust gas with a low oxygen concentration always passes through, the state suitable for storage is maintained, but if the generated power becomes unnecessary thereafter, the solid polymer fuel cell 4 is stopped and then stored. By closing the inlet valve 25 and the outlet valve 26 of the storage 15, the storage storage 15 can be hermetically sealed in a low oxygen concentration state. Therefore, even when the solid polymer fuel cell 4 is operated only when the generated power is required, The storage 15 can be maintained in a low oxygen state.

When the polymer electrolyte fuel cell 4 is in operation, the exhaust gas of low oxygen concentration from the oxidizer electrode 6 is stored in the storage chamber 15.
Is continuously supplied to the storage cabinet 15 to have a low oxygen concentration,
Since the exhaust gas of low oxygen concentration always passes through, the state suitable for storage is maintained, but when the generated power is not required at all, the user detects and displays the oxygen concentration of the storage 15, and the oxygen concentration display. Since the oxygen concentration in the storage 15 can be confirmed by the unit 27, the solid polymer fuel cell 4 is operated for a certain time until the oxygen concentration reaches a predetermined value, and then the storage 15
If the inlet valve 25 and the outlet valve 26 are closed, it can be sealed in a low oxygen state, so that it is possible to prevent consumption of fuel gas in excess of the required amount and to reduce the consumption amount of fuel gas.

The exhaust gas discharged from the fuel electrode 5 is supplied to the catalyst burner section 29, and the exhaust gas discharged from the oxidant electrode 6 is supplied to the combustion section 28. When the exhaust gas from the fuel electrode 5 contains unused residual hydrogen gas, the exhaust gas containing the hydrogen gas is supplied to the catalyst burner unit 29, and the combustion unit 28 receives low oxygen from the oxidizer electrode 6. Since the exhaust gas with a high concentration is supplied, when ignited by an ignition source (not shown), a combustion surface is formed in the catalyst burner section 29, and the residual hydrogen gas is oxidized by the catalytic combustion reaction to become water and also oxygen. Since it is consumed, the unused hydrogen gas in the polymer electrolyte fuel cell 4 can be safely processed, and the oxygen in the exhaust gas with a low oxygen concentration from the oxidizer electrode 6 is further consumed. It is possible to promote the decrease of the oxygen concentration in the inside.

The fuel supply means is the source fuel cylinder 7 and the reformer 8 in this embodiment, but it may be a hydrogen cylinder in which hydrogen gas is high-pressure sealed or a hydrogen storage alloy tank.

[0038]

As described above, the fuel cell of the present invention has the following effects.

That is, when air is supplied from the air supply means to the oxidizer electrode of the fuel cell and hydrogen is supplied to the fuel electrode from the fuel supply means, oxygen and hydrogen in the air are consumed by the electrochemical reaction and the generated power is generated. Is obtained. The low-oxygen concentration exhaust gas discharged from the oxidizer electrode is blown directly to the target object from the exhaust outlet after the generated water is removed by the water removing means on the downstream side, so that the generated water causes the food to scatter. It is possible to prevent changes in quality, etc., and to continuously supply an inert gas to the atmosphere of the target with a simple configuration that does not use a storage container, so it is possible to reduce the size and weight of the device and save space for the user. Without being restricted, it is possible to easily prevent foods from being oxidized and store them.

Further, since the air is supplied from the air supply means to the oxidizer electrode of the fuel cell and the hydrogen is supplied to the fuel electrode from the fuel supply means, it is possible to obtain the electric power generated by the electrochemical reaction, and at the same time, to generate the oxidizer. The exhaust gas discharged from the electrode is supplied to the storage with a low oxygen concentration in which oxygen is consumed and the generated water is removed, so it is possible to prevent the deterioration of food etc. due to the generated water being scattered, Even when the storage is frequently opened and closed, exhaust gas having a low oxygen concentration is continuously supplied into the storage, so that the food or the like can be stored while being prevented from being oxidized.

The low-oxygen concentration exhaust gas discharged from the oxidizer electrode is bubbled in the water storage section of the gas-liquid separation section, which is a means for removing water, and then supplied to the storage, so that the exhaust gas is cooled. Since the generated water is captured in the water storage part, the generated water does not accumulate in the storage and the food in the storage is not heated by the exhaust gas. It is possible to maintain, for example, cooked foods suitable for storage in a good storage state.

The low-oxygen concentration exhaust gas discharged from the oxidizer electrode has its water content removed and stored in a storage cabinet when passing through a permselective membrane provided with a porous hole through which the gas is selectively permeated. Since the water is supplied, it is possible to reliably remove the water with a simple configuration, and it is possible to simplify the apparatus.

Further, since the adsorption layer is composed of a porous body having fine concave portions on the surface, moisture is trapped in the concave portions and odor emitted from food in the storage is also adsorbed and trapped in the concave portions. The low oxygen concentration exhaust gas is supplied to the storage with moisture removed, and the odor in the storage is also removed, so even if multiple different foods are stored, the odor does not shift, and the low oxygen concentration is low. Depending on the atmosphere, food and the like can be kept in good condition.

When the generated power is no longer needed, the storage cell can be sealed by stopping the fuel cell and then closing the inlet valve and the outlet valve of the storage cell. Even when operating the fuel cell, the storage can always be kept in a low oxygen state.

Further, since the user can confirm the oxygen concentration in the storage by the oxygen concentration display section for detecting and displaying the oxygen concentration in the storage, the fuel cell is operated only for a certain time until the predetermined oxygen concentration is reached. After that, by closing the inlet valve and the outlet valve of the storage, it is possible to seal in a low oxygen state, so that the consumption of fuel gas can be reduced.

Further, since the unused fuel gas can be burned in the fuel portion by the exhaust gas from the oxidizer electrode,
Unused fuel gas in the fuel cell can be safely treated, and oxygen in the exhaust gas having a low oxygen concentration from the oxidizer electrode can be further consumed, so that the reduction in oxygen concentration in the storage can be promoted.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a storage device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a storage device according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part of a storage device according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a storage device according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view of a main part of a storage device according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a storage device according to a sixth embodiment of the present invention.

FIG. 7 is a sectional view of a conventional storage device.

[Explanation of symbols]

 4 Solid Polymer Fuel Cell 5 Fuel Electrode 6 Oxidizer Electrode 7 Source Fuel Cylinder 8 Reformer 9 Blower Fan 10 Moisture Removal Means 11 Exhaust Outlet 15 Storage 16 Gas-Liquid Separation Section 22 Selective Permeation Membrane 24 Adsorption Layer 25 Inlet Valve 26 Outlet valve 27 Oxygen concentration display section 28 Combustion section

Claims (8)

[Claims] 1. A fuel cell comprising a fuel electrode and an oxidant electrode,
Fuel supply means for supplying fuel to the fuel electrode, air supply means for supplying air to the oxidant electrode, water removing means provided in communication with the downstream side of the oxidant electrode, and the water removing means A storage device having an exhaust outlet provided in communication with the downstream side of the storage device. 2. The storage device according to claim 1, further comprising a storage compartment between the water removing means and the exhaust outlet. 3. The storage device according to claim 1, further comprising a gas-liquid separating section having a water storage section as a water removing means. 4. The storage device according to claim 1, further comprising a permselective membrane having a porosity as a water removing means. 5. The storage device according to claim 1, further comprising an adsorption layer as the water removing means. 6. The storage device according to claim 2, further comprising an inlet valve provided upstream of the storage and an outlet valve provided at an exhaust outlet of the storage. 7. An inlet valve provided upstream of the storage, an outlet valve provided at an exhaust outlet of the storage, and an oxygen concentration display section for detecting and displaying the oxygen concentration of the storage. The storage device according to claim 6, 8. The storage device according to claim 1 or 2, wherein a combustion section for combusting the fuel electrode exhaust gas discharged from the fuel electrode is provided, and the combustion section is provided on the downstream side of the oxidizer.