JP2001149738A - Oxygen removing device, and rice cooker and refrigerator using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive oxygen removing device with simple constitution. SOLUTION: There are provided a porous alumina plate 4 for partitioning oxygen concentration regulation side space 1 and atmosphere side space 2 and having water retention, a positive electrode 5 provided at the oxygen concentration regulation side space 1 of the porous alumina plate 4, a negative electrode 6 provided at the atmosphere side space 2 of the porous alumina plate 4 and a direct-current power source 7 for applying negative voltage to the negative electrode 6 and applying positive voltage to the positive electrode 5. Water is supplied to the porous alumina plate 4. In such a way, the oxygen in the oxygen concentration regulation side space 1 is removed by burning by using a catalyst the hydrogen generated at the negative electrode 6 side by electrolyzing the water, and the oxygen simultaneously generated at the positive electrode 5 side is released to the atmosphere side space 2, and the oxygen is transferred from the oxygen concentration regulation side space 1 to the atmosphere side space 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxygen removing device capable of removing oxygen in a container, and a jar rice cooker and a refrigerator using the oxygen removing device.

[0002]

2. Description of the Related Art Conventionally, an apparatus for removing oxygen from a container is disclosed in Japanese Patent Application Laid-Open No. 9-241003. This device was formed by laminating a first electrode thin film in contact with the atmosphere, a thin film of a solid electrolyte having oxygen ion conductivity, and a second electrode thin film in contact with the atmosphere in a container on the surface of a porous substrate. Things. In this device, when a negative voltage is applied to the second electrode thin film and a positive voltage is applied to the first electrode thin film, oxygen in the container is ionized into negative oxygen ions at the second electrode thin film, and the oxygen ions are converted into a solid electrolyte. It diffuses in the thin film, becomes oxygen gas again in the first electrode thin film, and is discharged into the atmosphere outside the container.

[0003]

However, in the above prior art, it is necessary to form a solid electrolyte thin film on a porous substrate. However, in order to obtain a good solid electrolyte thin film, a vacuum film forming apparatus is used. However, there is a problem that the manufacturing cost increases.

An object of the present invention is to provide an oxygen removing apparatus having a simple structure and low cost.

[0005]

In order to solve the above-mentioned problems, a first invention (corresponding to claim 1) separates a first space on the oxygen removing side from another second space, thereby improving water retention. A porous substrate having, electrodes provided on each of the first space side and the second space side of the porous substrate, and applying a negative voltage to the electrode on the first space side, A voltage applying means for applying a positive voltage to the electrode on the second space side, wherein water is supplied to the porous substrate.

Further, a second aspect of the present invention (corresponding to claim 2)
Is an oxygen removing device according to the first aspect of the present invention, further comprising a hydrogen gas oxidation catalyst disposed in the first space.

Further, a third aspect of the present invention (corresponding to claim 3)
Is an oxygen removing device according to the first or second aspect of the present invention, further comprising a water supply means for supplying water to the porous substrate.

Further, a fourth aspect of the present invention (corresponding to claim 4)
The oxygen removing device according to any one of the first to third aspects of the present invention, wherein the electrode provided on the porous substrate is a porous electrode.

A fifth invention (corresponding to claim 5)
By the temperature difference between the first space and the second space, the water vapor in the first space is condensed on the porous substrate,
The oxygen removing device according to any one of the first to fourth aspects of the present invention, wherein water is supplied to the porous substrate by the dew condensation.

A sixth aspect of the present invention (corresponding to claim 6)
Wherein the electrode on the first space side is an electrode having a two-layer structure of a hydrophilic electrode and a water-repellent electrode, and the hydrophilic electrode is arranged on the side in contact with the porous substrate. An oxygen removing apparatus according to any one of the first to fifth aspects of the present invention.

A seventh aspect of the present invention (corresponding to claim 7)
The oxygen according to any one of claims 1 to 5, wherein the electrode has a fibrous shape, and the fibrous electrode is pressed against and in contact with the porous substrate. It is a removal device.

An eighth aspect of the present invention (corresponding to claim 8).
Comprises a temperature measuring means for measuring a difference between the temperature of the hydrogen gas oxidation catalyst and the temperature of the first space or the second space, wherein the voltage applying means has a difference within a range of 0 to 50 ° C. Wherein the application of the voltage to the electrode is stopped.

The ninth invention (corresponding to claim 9)
The apparatus according to any one of claims 1 to 8, further comprising a dirt removing means for heating the porous substrate and removing dirt from the porous substrate and the electrode. It is a removal device.

According to a tenth aspect of the present invention (corresponding to claim 10), there is provided a jar rice cooker provided with at least the oxygen removing apparatus according to any one of the first to ninth aspects of the present invention, In the device, the first space is the jar rice cooker inner container, the second space is an atmospheric space,
A negative voltage is applied to the electrode disposed on the inner container side, a positive voltage is applied to the other electrode, and water vapor of the inner container is applied to the porous substrate by a temperature difference from the atmosphere. A jar rice cooker to which water produced by cooling and condensing is supplied.

An eleventh aspect of the present invention (corresponding to claim 11) is a refrigerator provided with at least the oxygen removing apparatus according to any one of the first to ninth aspects of the present invention. The first space is the refrigerator inner container, the second space is an air space, a negative voltage is applied to the electrode disposed on the inner container side, and a positive voltage is applied to the other electrode. Is applied, and the porous substrate is supplied with drain water in the refrigerator.

A twelfth aspect of the present invention (corresponding to claim 12) is a refrigerator provided with at least the oxygen removing apparatus according to any one of the first to ninth aspects of the present invention. The first space is the refrigerator inner container, the second space is an air space, a negative voltage is applied to the electrode disposed on the inner container side, and a positive voltage is applied to the other electrode. Is applied to the porous substrate, and water generated by cooling and condensing water vapor in the atmosphere by cool air in the refrigerator is supplied to the porous substrate.

[0017]

(Embodiment 1) The configuration and principle of an oxygen removing apparatus according to Embodiment 1 of the present invention will be described with reference to FIG.

In FIG. 1, 1 is a space on the oxygen concentration control side, and 2 is a space on the atmosphere side. FIG. 1 shows an example in which oxygen is removed from the atmosphere side space 2 and the removed oxygen is moved to the oxygen concentration control side space 1 side. 3 is a partition separating both spaces, 4 is a porous alumina plate, 5
And 6 are porous platinum electrodes formed by baking a platinum paste on the surface of the porous alumina plate 4,
A voltage is applied using the DC power supply 7 so that the electrode 5 becomes a positive electrode and the electrode 6 becomes a negative electrode.

Reference numeral 8 denotes a palladium catalyst formed in a net shape. Palladium is known as a hydrogen gas oxidation catalyst for burning hydrogen gas in air at room temperature. Although not shown for simplicity of the drawing, in the first embodiment, an oxygen removing device is configured by using these elements and a unit for supplying water to the porous alumina plate 4.

Hereinafter, the operation of the oxygen removing apparatus thus configured will be described. First, after impregnating the porous alumina plate 4 with water, when a positive voltage and a negative voltage are applied to the electrodes 5 and 6, respectively, the water impregnated in the porous alumina plate 4 is electrolyzed. As a result, oxygen gas 9 is generated on the positive electrode 5 side and released to the oxygen concentration control side space 1. On the other hand, hydrogen gas 10 is generated on the negative electrode 6 side, and this hydrogen gas 10 comes into contact with the palladium catalyst 8 and is burned by oxygen in the atmosphere side space 2 to become water. In the present embodiment, the generated water 11 is configured to be dropped and supplied to the porous alumina plate 4.

That is, in this oxygen removing apparatus, the oxygen gas 9 is supplied to the oxygen concentration control side space 1 by electrolysis, and at the same time, the hydrogen gas 10 The gas 12 is removed. That is, according to this configuration, the oxygen gas is substantially moved from the atmosphere side space 2 to the oxygen concentration control side space 1.

Although the spaces having different oxygen concentrations are separated by the porous alumina plate 4, since the alumina is hydrophilic, it is well compatible with water and water is quickly introduced into the pores of the porous alumina plate 4. In order to penetrate and block holes,
Oxygen gas does not move through the holes of the porous alumina plate 4. That is, oxygen generated by electrolysis does not move to the atmosphere side space 2.

Since the water generated by the palladium catalyst 8 is generated from the hydrogen gas 10 generated by the electrolysis, the amount of water consumed by the electrolysis and the water generated by the palladium catalyst 8 are supplied. The amount of water 11 is substantially equal. Therefore, during the operation of the present oxygen removing apparatus, the amount of water newly supplied to the porous alumina plate 4 may be a small amount that is lost due to evaporation or the like.

In the present oxygen removing apparatus, the hydrogen gas 10 generated by the electrolysis of water is returned to safe water by using the palladium catalyst 8. However, when the amount of moving oxygen is small, that is, the generated hydrogen gas 10 When there is no danger due to the small amount of the hydrogen gas, the configuration may be such that the hydrogen gas 10 is released into the atmosphere side space 2 without using the hydrogen oxidation catalyst.

The negative electrode 6 in the first embodiment is an electrode having a two-layer structure of a hydrophilic electrode and a water-repellent electrode, and the hydrophilic electrode is disposed on the side in contact with the porous alumina plate 4. It may be configured.

Further, the porous alumina plate 4 in the first embodiment is heated to
A means for removing dirt such as a heater for removing dirt may be provided. The porous alumina plate 4 is an example of a porous substrate of the oxygen removing device of the present invention.

(Embodiment 2) FIG. 2 is a schematic configuration diagram in which the oxygen removing apparatus of the present invention is applied to a jar rice cooker. In a jar rice cooker, cooked rice is kept warm and stored, but is kept at 70 ° C. or higher to suppress the propagation of various bacteria. Therefore, there is a problem that rice is oxidized when the temperature is kept for a long time and an unpleasant odor called a warm odor is generated. However, if the oxygen in the heating furnace is removed using the oxygen removing apparatus of the present invention, the oxidation of rice can be suppressed even at a temperature of 70 ° C. or higher, and the generation of unpleasant warm odor can be suppressed.

In FIG. 2, reference numeral 13 denotes a jar rice cooker in which the oxygen removing device of the present invention is incorporated.
And the inner pot 16 and the inner lid 17 therein, and the heater 1
8. An oxygen remover 20 is incorporated in a normal jar rice cooker having a vapor discharge hole 19. In addition, 21 is rice kept warm.

Oxygen removing device 2 used in this embodiment
0 is shown in FIG. In FIG. 3, reference numeral 22 denotes a partition in the lid 15, and the upper part of the figure is the atmosphere,
The lower part of the figure is in contact with the space inside the inner lid 17. 23 is a porous alumina plate having a thickness of 0.5 mm and a diameter of 30 mm,
A platinum negative electrode 2 is baked on both sides with a platinum paste.
4 and the positive electrode 25 are formed. Reference numeral 26 denotes a DC power supply for applying a voltage to both electrodes, and reference numeral 27 denotes a hydrogen oxidation catalyst formed by arranging palladium plates. These components constitute the oxygen removing device 20.

Next, the operation of the oxygen removing device 20 will be described. When the rice 21 is kept warm and stored in the jar rice cooker 13, the rice 21 is kept at a temperature of 70 ° C. or more as described above, and the space enclosed by the inner lid 17 and the inner pot 16 is The steam generated from the rice 21 exists in a substantially saturated state. On the other hand, since the temperature of the air space is lower than that in the kettle, the steam 28 in the kettle is
When this portion is in contact, the portion is cooled because the temperature is low, and the water vapor condenses, and the surface and the inside of the pores of the porous alumina plate 23 are covered with condensed water.

In this state, when a voltage is applied to the negative electrode 24 and the positive electrode 25 by the DC power supply 26, condensed water is electrolyzed, and oxygen gas 29 is generated on the positive electrode 25 side and released into the atmosphere. On the side 24, the condensed water is electrolyzed to generate hydrogen gas 30. Hydrogen gas 30 is used as hydrogen oxidation catalyst 27
Reacts with oxygen 31 in the kettle on the surface of the kettle and burns to produce water 32. This water 32 falls into the kettle and is returned.

Focusing attention on hydrogen in the process of electrolysis and water generation by the catalyst, since water is generated by the amount of hydrogen generated by the decomposition, the amount of water to be electrolyzed and the amount of water generated by the catalyst Is the same. Similarly, the amount of oxygen 31 consumed by combustion in the kettle is equal to the amount of oxygen gas 29 released to the atmosphere. That is, it can be said that the oxygen in the kettle has moved to the atmosphere side by the oxygen removing device 20.

As described above, in the present embodiment, the oxygen concentration in the kettle can be reduced, so that oxidation of the rice 21 can be suppressed, and unpleasant heat retention odor can be prevented.

FIG. 4 shows a second schematic configuration diagram of the oxygen removing apparatus 20. In FIG. 4, the same components as those in FIG. 3 are denoted by the same reference numerals. The configuration of the hydrogen oxidation catalyst 33 is different between FIG. 3 and FIG. In FIG. 4, a hydrogen oxidation catalyst 33 formed by supporting palladium on a coarse paper-like porous material made of silica fiber is used. This hydrogen oxidation catalyst 33
Is obtained by impregnating a paper-like silica fiber with a palladium chloride solution and baking to precipitate fine palladium particles on the surface of the fiber.

In FIG. 3, although a plate-like catalyst is used and the structure is simple, the generated water covers the surface and the contact of the hydrogen gas 30 to the surface of the hydrogen oxidation catalyst 27 is hindered, and In some cases, generation was suppressed. Therefore, the hydrogen oxidation catalyst 27 needs a relatively large area,
Its size had also grown. However, the hydrogen oxidation catalyst 33 shown in FIG. 4 is characterized by having a large surface area and good drainage due to its coarse fibrous shape, and the size of the hydrogen oxidation catalyst 33 can be reduced because generated water is quickly dropped and removed. There is.

In order to further drain the hydrogen oxidation catalyst 27, the hydrogen oxidation catalyst 27 may be subjected to a water-repellent treatment. Conversely, since the negative electrode 24 needs to electrolyze water, it is desirable that the negative electrode 24 be easily adapted to water and have water retention. Further, not only palladium but also platinum has a hydrogen oxidation catalytic action, so platinum may be used for the hydrogen oxidation catalyst 33.
In this case, the negative electrode 24 and the hydrogen oxidation catalyst 33 can be made of the same material, which is convenient for manufacturing. However, it is preferable that the hydrogen oxidation catalyst 33 be subjected to a water-repellent treatment.

As a specific method of the water-repellent treatment, for example, after a catalyst is supported on a paper-like porous material made of silica fiber, the porous material is dissolved in a sol-gel of silica in which a fluorinated hydrocarbon is dissolved. A method of immersing in a solution and firing to deposit silica in which the fluorinated hydrocarbon is dispersed is simple.

FIG. 5 shows a third schematic configuration diagram of the oxygen removing apparatus 20. In FIG. 5, the same components as those in FIG. 3 are denoted by the same reference numerals. In the configuration of FIG. 5, the negative electrode 34 and the positive electrode 35 also use platinum supported on paper-like silica fibers. These electrodes are made by impregnating a relatively dense paper-like silica fiber with a chloroplatinic acid solution and baking to deposit fine platinum particles on the surface of the fiber. Note that these electrodes are denser than the hydrogen oxidation catalyst 33 in order to impart water retention.
Further, these electrodes are fixed by pressing them against the porous alumina plate 23 using a stainless steel net 36.

In the embodiments shown in FIGS. 3 and 4, a platinum paste is baked on the electrode. The structure using the platinum paste has an advantage that it can be easily formed, but has a low mechanical adhesion. Therefore, in the embodiment shown in FIG. 5, the fibrous electrode is fixed by mechanically pressing the porous alumina plate 23.

FIG. 6 shows a fourth schematic configuration diagram of the oxygen removing apparatus 20. 6, the same components as those in FIGS. 3 and 4 are denoted by the same reference numerals. In FIG. 6, the hydrogen oxidation catalyst 37 is formed on the surface of the inner lid 17. This catalyst was prepared by forming a palladium thin film to a thickness of about 100 nm on the entire surface of the inner lid 17 by using a sputtering method. Reference numeral 38 denotes a packing for maintaining airtightness. In the embodiment of FIG. 6, since the entire surface of the inner lid 17 shown in FIG. 2 is used as a catalyst, the contact area with the hydrogen gas 30 is large, and there is an advantage that hydrogen can be efficiently converted to water. .

Although not shown in FIG. 2, a heater is incorporated in the inside of the lid 15 to prevent dew condensation on the inner lid 17, and the inner lid 17 is periodically heated during the heat retention. ing. Therefore, the inner lid 17 is always kept in a dry state, and the problem that the surface is covered with water generated by forming the hydrogen oxidation catalyst 37 on the surface can be solved.

FIG. 7 shows how the oxygen concentration and the hydrogen concentration in the kettle change when the oxygen removal apparatus of FIG. 3 is operated and the electrolysis is performed at a constant applied voltage. Due to the operation of the oxygen removing device, the oxygen concentration in the kettle decreases from the initial point A and eventually reaches about 0%. However, if the operation is continued with the oxygen in the kettle exhausted, the hydrogen gas is filled in the kettle. It starts to be dangerous. Therefore, control is performed to stop the operation of the oxygen transfer device in a state where the oxygen in the kettle has run out.

FIG. 7 also shows the relationship between the temperature of the hydrogen oxidation catalyst 27 and the temperature of the hydrogen oxidation catalyst 27 at the initial stage of operation.
The surface temperature of 7 once rises from the heat retention temperature due to the burning of hydrogen on the surface. On the other hand, the oxygen concentration in the kettle decreases with the combustion of hydrogen, so the combustion gradually slows down,
The surface temperature of the hydrogen oxidation catalyst 27 also starts to decrease, but as long as oxygen is present, the temperature is always higher than the heat retention temperature of the atmosphere. Eventually, when all the oxygen is consumed, the temperature of the hydrogen oxidation catalyst 27 drops to the heat retention temperature indicated by the point B.

Therefore, the oxygen concentration in the kettle and the hydrogen oxidation catalyst 27
Is measured in advance to obtain the relationship in FIG. 7, and the oxygen concentration in the kettle is estimated from the temperature of the hydrogen oxidation catalyst 27. Specifically, assuming that a predetermined oxygen concentration is C in FIG. 7, the operation of the oxygen removing device is stopped when the temperature of the hydrogen oxidation catalyst 27 becomes D. This can avoid the danger of filling the kettle with hydrogen. Naturally, the heat retention temperature and the hydrogen oxidation catalyst 33
The same applies when the operation of the oxygen transfer device is stopped by measuring the difference from the temperature.

The optimum value of the temperature D cannot be determined unequivocally because it depends on the heat capacity and area of the hydrogen oxidation catalyst 27 and the volume in the kettle. However, if the temperature difference from the heat retention temperature B is in the range of about 0 to 50 ° C., oxygen in the kettle is almost removed, and there is no danger of filling the kettle with hydrogen.

Since the amount of oxygen existing in the jar rice cooker before operation, that is, the space volume varies depending on the amount of rice remaining in the jar rice cooker, the oxygen concentration in the kettle only depends on the operation time of the oxygen removing device. I can't decide.

In the above embodiment, an alumina plate is used as the porous substrate having water retention. However, any material other than the alumina plate may be used as long as it has insulation and water retention. For example, a material obtained by molding silica fiber into a paper shape or a nonwoven fabric, or a water-absorbing polymer material may be used.
In addition, it is more effective that the shape of the porous base material is not limited to a plate shape but is devised to increase the area such as a cylindrical shape or a corrugated plate shape in order to increase the amount of oxygen transfer.

Further, in the above embodiment, platinum was used as the electrode material and palladium was used as the hydrogen oxidation catalyst. However, these materials are not limited to platinum and palladium, but their alloys and other alloys may be used. A metal material or a ceramic material may be used.

It is to be understood that the present invention includes that a user puts water into a water tank or the like and supplies water to the porous base material using the water in the water tank.

(Embodiment 3) FIG. 8 is a schematic configuration diagram in which the oxygen removing apparatus of the present invention is applied to a refrigerator. Refrigerators keep foods at a low temperature to prevent their freshness from deteriorating. However, vegetables, in particular, perform respiration and metabolism even at a low temperature, and have a problem that freshness gradually decreases and cannot be stored for a long time. Therefore, in the third embodiment, respiration and metabolism of vegetables are stopped by removing oxygen in the refrigerator, thereby enabling long-term storage.

In FIG. 8, reference numeral 39 denotes a refrigerator incorporating the oxygen removing apparatus of the present invention, 40 denotes a cooler, 41 denotes a fan for circulating cold air in the refrigerator, and 42 melts ice adhered to the cooler. A drain pan for receiving the water generated when the water is removed, 43 is an oxygen removing device of the present invention incorporated therein, and 44 is a drain pan for receiving the water generated by the oxygen removing device 43.

Although not shown, the drain pans 42 and 44 are provided with drain pipes for draining water out of the refrigerator. Since the specific configuration of the oxygen removing device 43 is the same as that shown in FIG. 4, its operation will be described with reference to FIG.

Although the space inside the refrigerator 39 is in contact with the atmosphere through the porous alumina plate 23, the inside of the refrigerator is kept at a lower temperature than the atmosphere, so that the porous alumina plate 2
3 is condensed with water vapor in the atmosphere, and the porous alumina plate 23
The surface and inside of the pores are covered with this condensed water. When a voltage is applied to the negative electrode 24 and the positive electrode 25 using the DC power supply 26 in this state, condensed water is electrolyzed, and oxygen gas 29 is generated on the positive electrode 25 side and released into the atmosphere. On the side, condensed water is electrolyzed to generate hydrogen gas.

The hydrogen gas reacts with the oxygen 31 in the storage on the surface of the hydrogen oxidation catalyst 33 and burns to produce water 32. The water 32 is stored in a drain pan 44 and discharged out of the refrigerator through a drain pipe. Since the porous alumina plate 23 is constantly cooled by cold air in the refrigerator, water vapor in the air is constantly condensed on the surface thereof, and the porous alumina plate 23 dries and the oxygen removing device 43 operates. There's nothing you can't do.

As described above, in this embodiment, the oxygen concentration in the refrigerator can be reduced, the growth of stored vegetables and the like can be suppressed, and the storage can be performed for a longer period.

FIG. 9 shows another configuration of the oxygen removing device 43 incorporated in the refrigerator. In FIG. 9, the same components as those in FIG. 4 are denoted by the same reference numerals. 9 and 4 differ in the method of supplying water to the porous alumina plate 23. In the configuration shown in FIG. 9, the water collected in the drain pan 42 is stored in a water receiving container 46 through a drain pipe 45, and the stored water 47 is supplied to the porous alumina plate 23 through a cloth-like water-guiding cloth 48 coated with silver fine particles. are doing. By using drain water in this way, water can be supplied stably. The reason why the water guide cloth 48 is coated with the silver fine particles is to suppress the growth of mold and various germs. Also,
As a method of suppressing the growth of mold and various bacteria on the oxygen removing device 43, a method of regularly heating and sterilizing using a heater provided with a porous alumina plate 23 is also simple. By heating the porous alumina plate 23 to about 70 ° C. to 150 ° C. or more, not only molds and fungi but also organic dirt can be removed.

It is to be understood that the present invention includes that a user puts water into a water tank or the like and supplies water to the porous base material using the water in the water tank.

In both the second and third embodiments, applied devices for removing oxygen by incorporating an oxygen removing device have been described. However, the present oxygen removing device takes in oxygen from the atmosphere to obtain the required atmosphere. It is also possible to easily increase the oxygen concentration in the inside. For example, as long as the effect can be obtained by increasing the oxygen concentration in the atmosphere, such as a fermented food production device or a combustion device, the oxygen removal device of the present invention is used to remove oxygen in the atmosphere to remove the oxygen. It is effective to configure so as to utilize oxygen that has been generated.

[0059]

As described above, according to the present invention, it is possible to provide an inexpensive oxygen removing apparatus with a simple structure. This oxygen removal device is very easy to configure and manufacture,
It can be easily incorporated into a device or the like for storing food, and has a remarkable effect that the food can be deteriorated or stored for a long time.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration and a principle of an oxygen removing device according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a jar rice cooker incorporating an oxygen removing device according to Embodiment 2 of the present invention.

FIG. 3 is a first schematic configuration diagram of an oxygen removing apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a second schematic configuration diagram of an oxygen removing apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a third schematic configuration diagram of the oxygen removing apparatus according to Embodiment 2 of the present invention.

FIG. 6 is a fourth schematic configuration diagram of the oxygen removing apparatus according to Embodiment 2 of the present invention.

FIG. 7 is a characteristic diagram of the oxygen concentration and the hydrogen concentration when the oxygen removing device of FIG. 3 is used.

FIG. 8 is a schematic configuration diagram of a refrigerator incorporating an oxygen removing device according to Embodiment 3 of the present invention.

FIG. 9 is a schematic configuration diagram of one of the oxygen removing apparatuses according to the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Oxygen concentration adjustment side space 2 ... Atmosphere side space 4 ... Porous alumina plate 5 ... Positive electrode 6 ... Negative electrode 7 ... DC power supply 8 ... Palladium catalyst

Claims (12)

[Claims] 1. A porous base material that partitions a first space on the oxygen removal side from another second space and has water retention properties; and a first base space side and a second space side of the porous base material. Applying a negative voltage to an electrode provided on each surface and the electrode on the first space side;
An oxygen removing device, comprising: voltage applying means for applying a positive voltage to the electrode on the space side, wherein water is supplied to the porous substrate. 2. The oxygen removing device according to claim 1, further comprising a hydrogen gas oxidation catalyst disposed in the first space. 3. The oxygen removing device according to claim 1, further comprising a water supply unit that supplies water to the porous substrate. 4. The oxygen removing device according to claim 1, wherein the electrode provided on the porous substrate is a porous electrode. 5. The temperature difference between the first space and the second space causes the water vapor in the first space to condense on the porous substrate, and the condensation supplies water to the porous substrate. The oxygen removing device according to any one of claims 1 to 4, wherein the oxygen removing device is used. 6. The electrode on the first space side is an electrode having a two-layer structure of a hydrophilic electrode and a water-repellent electrode, and the hydrophilic electrode is arranged on the side in contact with the porous substrate. The oxygen removing device according to any one of claims 1 to 5, wherein 7. The oxygen according to claim 1, wherein the electrode has a fibrous shape, and the fibrous electrode is pressed against and in contact with the porous substrate. Removal device. 8. A temperature measuring means for measuring a difference between a temperature of the hydrogen gas oxidation catalyst and a temperature of the first space or the second space, wherein the voltage applying means has the difference of 0 to 50 ° C. The oxygen removing device according to claim 2, wherein the application of the voltage to the electrode is stopped when the voltage falls within the range. 9. The oxygen according to claim 1, further comprising a dirt removing means for heating the porous substrate to remove dirt on the porous substrate and the electrode. Removal device. 10. A jar rice cooker provided with at least the oxygen removing device according to claim 1, wherein the first space in the oxygen removing device is the jar rice cooker inner container, The second space is an air space, a negative voltage is applied to the electrode disposed on the inner container side, a positive voltage is applied to the other electrode, and the porous substrate is A jar rice cooker, wherein water produced by cooling and condensing water vapor in an inner container due to a temperature difference from the atmosphere is supplied. 11. A refrigerator provided with at least the oxygen removing device according to any one of claims 1 to 9, wherein the first space in the oxygen removing device is the refrigerator inner container, and the second space. Is an air space, a negative voltage is applied to the electrode disposed on the inner container side, a positive voltage is applied to the other electrode, and a drain in the refrigerator is provided on the porous substrate. A refrigerator to which water is supplied. 12. A refrigerator provided with at least the oxygen removing device according to claim 1, wherein the first space in the oxygen removing device is the refrigerator inner container and the second space. Is an air space, a negative voltage is applied to the electrode disposed on the inner container side, a positive voltage is applied to the other electrode, and water vapor in the air is applied to the porous substrate. A refrigerator, wherein water generated by being cooled and condensed by cold air in the refrigerator is supplied.