Storage

Abstract

To provide a storage cabinet that can keep carbon dioxide concentration in a storage chamber higher than that in outdoor air.SOLUTION: A storage cabinet 10 comprises a storage chamber 30 for storing food, and a carbon dioxide concentration increase part 60 for increasing carbon dioxide concentration in the storage chamber 30. The carbon dioxide concentration increase part 60 comprises a first flow passage 61 for circulating gas in the storage chamber 30, a second flow passage 66 through which outdoor air passes, and a honeycomb rotor 80 for rotating so as to be movable between a carbon dioxide release position PA corresponding to the first flow passage 61 and a carbon dioxide adsorption position PB corresponding to the second flow passage 66, and having adsorption / desorption capability.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a reservoir. [Background technology]

[0002] In recent years, reducing food waste has become an issue in developed countries. In order to reduce food loss, various technologies are being investigated to extend the shelf life of food, especially perishable fruits and vegetables.

[0003] Foods such as fruits and vegetables go bad due to a variety of factors, including direct oxidation by oxygen, over-ripening by ethylene, spoilage of food by microorganisms such as bacteria and mold, etc. Therefore, in storage facilities such as refrigerators and low-temperature warehouses that contain fruits and vegetables, the aim is to maintain quality for a long period of time by controlling parameters such as temperature, humidity, light intensity, oxygen concentration, carbon dioxide concentration, and ethylene amount (Non-Patent Document 1).

[0004] For example, in a refrigerator, the refrigerator compartment is generally arranged in the upper part of the box, the freezer compartment in the middle, and the vegetable compartment in the lower part, and each storage compartment is divided by a heat-insulating partition wall to minimize heat transfer. In a partial cooling type refrigerator (a type of refrigerator in which cold air cooled by a cooler is blown out to the freezer compartment, refrigerator compartment, and vegetable compartment by a blower fan), which is generally the mainstream type of refrigerator, a refrigeration cycle that generates cold air inside the refrigerator is provided, and the cold air generated by the cooler of this refrigeration cycle is circulated to each storage compartment by a blower to cool the stored items. A method for reducing oxygen and increasing carbon dioxide in such a refrigerator by burning oxygen has also been disclosed (Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-204807 A [Non-patent literature]

[0006] [Non-Patent Document 1] Monthly Vegetable Information September 2016 issue, pages 44-56 About vegetable quality preservation technology Summary of the Invention [Problem to be solved by the invention]

[0007] However, the oxidation reaction of oxygen, including combustion, described in Patent Document 1 is an exothermic reaction, and there was a problem in that heat was generated inside the storage facility each time it was opened and closed, and then the generated heat was cooled by the heat pump, which significantly reduced energy efficiency. In view of the above problems, the present invention aims to provide a storage facility that does not require an oxidation reaction (exothermic reaction) that consumes oxygen within the storage facility, is energy efficient, and can maintain a carbon dioxide concentration within the storage facility higher than that of the outside air. [Means for solving the problem]

[0008] The inventors have investigated increasing the concentration of carbon dioxide in a storage facility by using an amine-based absorbing liquid or amine-based solid absorbent that is used to capture carbon dioxide from large-scale emission sources such as the electric power industry and the steel industry, but have found new problems, such as the need for heat during desorption and the release of cold air to the outside of the storage facility when transferring liquid or solid from the carbon dioxide capture system to the desorption system. As a result of further investigation, it has been found that the carbon dioxide concentration in the storage facility can be increased and maintained by capturing carbon dioxide from the outside air through a honeycomb rotor that has carbon dioxide adsorption ability and continuously releasing carbon dioxide into the storage facility.

[0009] [1] A storage facility having a storage chamber for storing food and a carbon dioxide increasing section for increasing the carbon dioxide concentration in the storage chamber, The carbon dioxide increasing section is A first flow path that circulates gas within the storage chamber; a second flow path through which outside air passes; A storage facility comprising: a honeycomb rotor that is rotatable between a carbon dioxide release position corresponding to the first flow path and a carbon dioxide intake position corresponding to the second flow path, and that has carbon dioxide adsorption and desorption capabilities.

[0010] [2] The storage facility according to [1], wherein the honeycomb rotor is an amine honeycomb rotor carrying an amine.

[0011] [3] The storage facility according to [1] or [2], wherein the honeycomb rotor is an amine-grafted honeycomb rotor having an amine grafted thereon.

[0012] [4] The storage facility according to any one of [1] to [3], wherein a temperature of the gas passing through the first flow path is lower than a temperature of the gas passing through the second flow path.

[0013] [5] A storage facility described in any one of [1] to [4], wherein the flow velocity of gas passing through the honeycomb rotor at the carbon dioxide release position is faster than the flow velocity of gas passing through the honeycomb rotor at the carbon dioxide intake position.

[0014] [6] A heat pump is provided for cooling the storage compartment, The storage facility according to any one of [1] to [5], wherein the gas moving toward the carbon dioxide absorption position is heated by heat radiation from the heat pump.

[0015] [7] The storage facility according to any one of [1] to [6], wherein a catalyst containing platinum is provided in the storage chamber.

[0016] [8] A carbon dioxide detection means for detecting a carbon dioxide concentration in the storage chamber, The storage facility according to any one of [1] to [7], wherein the presence or absence of rotation of the honeycomb rotor and the rotation speed of the honeycomb rotor are controlled based on the detection result of the carbon dioxide concentration by the carbon dioxide detection means.

[0017] [9] The storage facility according to any one of [1] to [8], wherein the storage facility is a refrigerator. Effect of the Invention

[0018] According to the present invention, the carbon dioxide concentration in the storage facility can be maintained higher than that of the outside air, thereby suppressing the metabolism of fruits, vegetables, flowers, etc., and allowing the freshness to be maintained for a long period of time. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram for explaining an embodiment of the present invention, and is a perspective view showing a refrigerator as an application example of a storage unit. [Diagram 2] FIG. 2 is a schematic diagram showing a schematic configuration of the refrigerator in FIG. [Diagram 3] FIG. 3 is a schematic diagram showing a schematic configuration of a cooling unit that can be included in the refrigerator of FIG. [Figure 4] FIG. 4 is a schematic diagram showing a schematic configuration of a carbon dioxide increasing section that can be included in the refrigerator of FIG. [Diagram 5] FIG. 5 is a perspective view showing a carbon dioxide exchange device that can be included in the carbon dioxide expansion section of FIG. [Figure 6] FIG. 6 is a vertical cross-sectional view taken along line IV-IV in FIG. [Figure 7] FIG. 7 is a perspective view showing a honeycomb rotor that can be included in the carbon dioxide exchange device of FIG. [Figure 8] FIG. 8 is a plan view showing a portion of the honeycomb rotor of FIG. [Figure 9] FIG. 9 is a diagram corresponding to FIG. 4, showing a modified example of the carbon dioxide increasing section. [Figure 10] FIG. 10 is a diagram corresponding to FIG. 4, showing another modified example of the carbon dioxide increasing section. [Figure 11] FIG. 11 is a diagram corresponding to FIG. 4, showing a modified example of the cooling section and the carbon dioxide increasing section. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings attached to this specification, the scale and aspect ratios are appropriately changed and exaggerated from those of the actual objects for the convenience of illustration and understanding. In addition, configurations shown in some drawings may be omitted in other drawings.

[0021] In this specification, terms that specify shapes or geometric conditions and their degrees, such as "parallel," "orthogonal," and "same," as well as values ​​of lengths and angles, are not limited to their strict meanings, but are interpreted to include a range within which similar functions can be expected.

[0022] In order to clarify the relationship between directions between the drawings, some drawings show the first direction D1, the second direction D2, and the third direction D3 as common directions by arrows with common symbols. The first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other. The tip of the arrow is one side of each direction. An arrow pointing from the paper surface along a direction perpendicular to the paper surface of the drawing to the viewer is shown by a symbol of a dot in a circle, as shown in FIG. 6, for example.

[0023] 1 to 11 are diagrams for explaining one embodiment, and the embodiment will be described with reference to the illustrated specific example. The storage facility 10 according to this embodiment has a storage chamber 30 for storing food and a carbon dioxide increasing section 60 for increasing the carbon dioxide concentration in the storage chamber 30. The carbon dioxide increasing section 60 makes it possible to maintain the carbon dioxide concentration in the storage chamber 30 at a higher concentration than the carbon dioxide concentration in the air. In particular, according to this embodiment, a device is devised that can maintain the carbon dioxide concentration in the storage chamber 30 at a high concentration with excellent energy efficiency without requiring an oxidation reaction that consumes oxygen in the storage facility 10. This allows the metabolism of food such as fruits and vegetables to be suppressed, and food can be stored while maintaining its quality for a long period of time.

[0024] The storage facility 10 is applicable to various facilities having a storage room 30 for storing food. Specific examples of the storage facility 10 include a warehouse, a refrigerated warehouse, a freezer warehouse, a container, a refrigerated container, a freezer container, a home or commercial refrigerator 12, a refrigerated vehicle, a freezer vehicle, and the like. In the illustrated example, the storage facility 10 is a refrigerator 12. Below, an example in which the storage facility 10 is applied to a refrigerator 12 will be described, but the application of the storage facility 10 according to this embodiment is not limited to the refrigerator 12.

[0025] The illustrated refrigerator 12 includes a storage body 20, a closure 25, a cooling section 40, and a carbon dioxide expansion section 60. The storage body 20 and the closure 25 define a storage compartment 30. The illustrated storage body 10 further includes a controller 35 and a carbon dioxide detection section 36.

[0026] The storage body 20 defines an open storage chamber 30. The closure body 25 is movable relative to the storage body 20 and functions as a sliding door or a door. The closure body 25 can open and close the opening of the storage body 20. That is, the closure body 25 closes the storage chamber 30 so that it can be opened. The illustrated refrigerator 12 has a first storage chamber 31, a second storage chamber 32, and a third storage chamber 33 as the storage chambers 30. The first storage chamber 31 is provided at the top in the vertical direction and can be used as a refrigeration chamber. The second storage chamber 32 is located between the first storage chamber 31 and the third storage chamber 33 in the vertical direction. The second storage chamber 32 can be used as a freezer chamber. The third storage chamber 33 is provided at the bottom in the vertical direction and can be used as a vegetable chamber. The storage body 20 and the closure body 25 incorporate a heat insulating material to maintain the storage chamber 30 at a low temperature.

[0027] The cooling unit 40 maintains the temperature of the storage chamber 30 lower than the room temperature or the outside air temperature. The cooling unit 40 maintains the temperature of the storage chamber 30 at a low temperature by supplying cold air to the storage chamber 30. The cooling unit 40 shown in FIG. 2 has a circulation path 41 and a heat pump 50. The heat pump 50 has a heat absorption section 51 and a heat radiation section 52. The heat pump 50 absorbs heat at the heat absorption section 51 from gas that is collected from the storage chamber 30 and moves in the circulation path 41. The heat pump 50 discharges heat at the heat radiation section 52 to the outside of the refrigerator 12 (storage cabinet 10). The circulation path 41 is provided with a blower 43, and circulates gas in the circulation path that passes through the storage chamber 30 and the heat pump 50. The gas in the storage chamber 30 is collected by the heat absorption section 51, and the cold air cooled by the heat absorption section 51 is supplied into the storage chamber 30. This allows the storage chamber 30 to be maintained at a low temperature. The cooling section 40 will now be described in further detail with reference to the illustrated embodiment.

[0028] As shown in FIG. 3, the circulation path 41 is a flow path of gas circulating between the storage chamber 30 and the heat pump 50. The circulation path 41 has a supply tube portion 42A, a recovery tube portion 42B, and a heat exchange portion 42C. The heat exchange portion 42C constitutes a gas flow path passing around the heat absorption portion 51 of the heat pump 50. The supply tube portion 42A extends between the heat exchange portion 42C and the storage chamber 30, and constitutes a gas flow path from the heat exchange portion 42C to the storage chamber 30. The recovery tube portion 42B extends between the heat exchange portion 42C and the storage chamber 30, and constitutes a gas flow path from the storage chamber 30 to the heat exchange portion 42C. The supply tube portion 42A, the recovery tube portion 42B, and the heat exchange portion 42C may be ducts made of metal or resin, for example. In the illustrated example, the storage chamber 30 has a first storage chamber 31, a second storage chamber 32, and a third storage chamber 33. The supply tube portion 42A extending from the heat exchange portion 42C branches into three and connects to the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33. The three recovery tube portions 42B extending from the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33 join together and connect to the heat exchange portion 42C. The blower 43 is provided in the supply tube portion 42A.

[0029] As shown in FIG. 3, the heat pump 50 has a compressor 56, a condenser 57, an expansion valve 58, and an evaporator 59. A refrigerant such as isobutane circulates through the compressor 56, the condenser 57, the expansion valve 58, and the evaporator 59 in this order. The compressor 56 is also called a compressor, and compresses the refrigerant by electric energy. The temperature of the refrigerant rises by adiabatic compression. The condenser 57 is also called a condenser, and liquefies the refrigerant gas compressed by the compressor 56. The condenser 57 radiates heat as the refrigerant liquefies. That is, the condenser 57 constitutes the heat radiating section 52. The compressor 56 and the condenser 57 are exposed to the outside of the refrigerator 12. The temperature of the refrigerant drops as the refrigerant liquefies. The expansion valve 58 expands the refrigerant. The temperature and pressure of the refrigerant drop by adiabatic expansion. The boiling point of the refrigerant also drops as the pressure drops. The evaporator 59 is also called an evaporator, and vaporizes the liquid refrigerant whose boiling point has been lowered by the expansion valve 58. The expansion valve 58 constitutes the heat absorbing section 51. The expansion valve 58 absorbs heat from the gas passing through the heat exchange section 42C. As a result, the gas moving through the circulation path 41 is cooled.

[0030] In the example shown in Fig. 3, the refrigerator 12 has a controller 35. The controller 35 is electrically connected to the blower 43 and the heat pump 50 via wiring 37. The controller 35 controls the operation of the blower 43 and the heat pump 50 according to the detection result of a temperature sensor (not shown) and the like, thereby maintaining the inside of the storage compartment 30 at a desired temperature. The controller 35 may include a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The controller 35 may further include a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory).

[0031] Valves for opening and closing the circulation path 41 may be provided at the branching positions of the supply tube portion 42A and the recovery tube portion 42B to the storage chambers 31, 32, and 33. By operating these valves, the temperatures of the storage chambers 31, 32, and 33 can be adjusted separately.

[0032] The carbon dioxide increasing section 60 maintains the carbon dioxide concentration in the storage chamber 30 at a higher concentration than the carbon dioxide concentration in the air. The carbon dioxide increasing section 60 maintains the carbon dioxide concentration in the storage chamber 30 at a high concentration by supplying gas containing a high concentration of carbon dioxide to the storage chamber 30.

[0033] The carbon dioxide increasing section 60 shown in FIG. 2 has a first flow path 61, a second flow path 66, and a carbon dioxide exchanger 70. The first flow path 61 is a circulation flow path for gas passing through the storage chamber 30 and the carbon dioxide exchanger 70. The second flow path 66 is a flow path for outside air passing through the carbon dioxide exchanger 70. The carbon dioxide exchanger 70 has a rotatable honeycomb rotor 80. The honeycomb rotor 80 has a carbon dioxide adsorption and desorption ability capable of adsorbing and desorbing carbon dioxide. As the honeycomb rotor 80 rotates, each part of the honeycomb rotor 80 alternately reaches a carbon dioxide release position PA corresponding to the first flow path 61 and a carbon dioxide absorption position PB corresponding to the second flow path 66. At the carbon dioxide absorption position PB, the honeycomb rotor 80 adsorbs carbon dioxide in the outside air moving through the second flow path 66. The carbon dioxide adsorbed by the honeycomb rotor 80 is desorbed at the carbon dioxide release position PA. The carbon dioxide desorbed from the honeycomb rotor 80 is sent to the storage chamber 30 together with the gas moving through the first flow path 61. This makes it possible to maintain a high carbon dioxide concentration in the storage chamber 30. Hereinafter, the carbon dioxide increasing section 60 will be described in further detail with reference to the illustrated specific example.

[0034] As shown in FIG. 4, the first flow path 61 is a flow path of gas circulating between the storage chamber 30 and the carbon dioxide exchanger 70. The first flow path 61 has a supply tube portion 62A and a recovery tube portion 62B. Each of the supply tube portion 62A and the recovery tube portion 62B extends between the storage chamber 30 and the carbon dioxide exchanger 70. The gas in the storage chamber 30 moves in the recovery tube portion 62B and reaches the carbon dioxide exchanger 70, which is the carbon dioxide release position PA. The gas to which carbon dioxide has been added at the carbon dioxide release position PA moves in the supply tube portion 62A and reaches the storage chamber 30 from the carbon dioxide exchanger 70. The supply tube portion 62A and the recovery tube portion 62B may be ducts made of metal or resin, for example. The supply tube portion 62A extending from the carbon dioxide exchanger 70 branches into three and connects to the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33. The three collecting tube portions 62B extending from the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33 join together and are connected to the carbon dioxide exchange device 70. A first blower 63 is provided in the collecting tube portion 62B.

[0035] A valve 64 is provided in the first flow path 61. The valve 64 opens and closes the first flow path 61. The valve 64 may be provided in the branched portions of the supply tube portion 62A and the recovery tube portion 62B corresponding to each of the storage chambers 31, 32, and 33. In the illustrated example, the valve 64 is provided in each of the three branched portions of the supply tube portion 62A. By operating each valve 64, the carbon dioxide concentration in each of the storage chambers 31, 32, and 33 can be adjusted separately.

[0036] The second flow path 66 is a flow path for gas circulating between the outside of the refrigerator 12 and the carbon dioxide exchanger 70. The second flow path 66 has an intake tube portion 67A and a discharge tube portion 67B. The intake tube portion 67A and the discharge tube portion 67B are each connected to the carbon dioxide exchanger 70. The carbon dioxide exchanger 70 is located between the intake tube portion 67A and the discharge tube portion 67B. Air as outside air is sucked into the intake tube portion 67A. The air moves inside the intake tube portion 67A and reaches the carbon dioxide exchanger 70, which is the carbon dioxide intake position PB. At the carbon dioxide intake position PB, carbon dioxide in the outside air is adsorbed by the honeycomb rotor 80 of the carbon dioxide exchanger 70. The gas that has absorbed the carbon dioxide moves inside the discharge tube portion 67B and is released into the outside air. The intake tube portion 67A and the discharge tube portion 67B may be ducts made of metal or resin, for example. A second fan 68 is provided in the suction tube portion 67A.

[0037] As shown in Figures 5 and 6, the carbon dioxide exchange device 70 has a honeycomb rotor 80, a casing 72 that houses the honeycomb rotor 80, and a driver 76 that drives the honeycomb rotor 80 to rotate. An example of the driver 76 is an electric motor. The casing 72 houses the honeycomb rotor 80 so that it can rotate. The casing 72 is provided with a through hole 74H (see Figure 6) to which the shaft member 84 of the honeycomb rotor 80 is connected. The casing 72 and the honeycomb rotor 80 are configured in a roughly cylindrical shape, and the axial length of the cylinder is shorter than the diameter of the cylinder.

[0038] The casing 72 is provided with a first opening 73A and a second opening 73B on each surface corresponding to the bottom surface of the cylinder. The casing 72 has an intermediate frame portion 74 at a position between the first opening 73A and the second opening 73B. As shown in FIG. 6, a through hole 74H is provided in each of the pair of intermediate frame portions 74. The driver 76 is fixed to the casing 72. The driver 76 is connected to a shaft member 84 and drives the shaft member 84 to rotate. In the illustrated example, the driver 76 is fixed to one of the intermediate frame portions 74 and directly connected to the shaft member 84. However, instead of this example, the driver 76 may be connected to the shaft member 84 via a power transmission means such as a V-belt or gears.

[0039] As shown in FIG. 6, the supply tube portion 62A and the recovery tube portion 62B of the first flow passage 61 are inserted into the first opening 73A of the casing 72. The first opening 73A is blocked by the supply tube portion 62A and the recovery tube portion 62B. The supply tube portion 62A and the recovery tube portion 62B are close to or in contact with the honeycomb rotor 80 to an extent that does not interfere with the rotation of the honeycomb rotor 80. This prevents the gas from the recovery tube portion 62B from leaking out of the honeycomb rotor 80, and passes through a through hole 80H (described later) of the honeycomb rotor 80 to proceed to the supply tube portion 62A. The suction tube portion 67A and the discharge tube portion 67B of the second flow passage 66 are inserted into the second opening 73B of the casing 72. The second opening 73B is blocked by the suction tube portion 67A and the discharge tube portion 67B. The suction tube portion 67A and the discharge tube portion 67B are close to or in contact with the honeycomb rotor 80 to an extent that does not interfere with the rotation of the honeycomb rotor 80. This prevents gas from the suction tube portion 67A from leaking out of the honeycomb rotor 80, and passes through a through hole 80H (described later) of the honeycomb rotor 80 to proceed to the discharge tube portion 67B.

[0040] As shown in Figs. 6 and 7, the honeycomb rotor 80 is provided with through holes 80H for ventilation. The through holes 80H extend in a first direction D1 parallel to the rotation axis of the honeycomb rotor 80. The arrangement of the through holes 80H in the honeycomb rotor 80 is not limited to a honeycomb arrangement. The opening shape of the through holes 80H in the honeycomb rotor 80 is not limited to a hexagon. The arrangement of the through holes 80H may be regular or irregular. There is no particular limitation on the manufacturing method of the honeycomb rotor 80 having a large number of through holes 80H.

[0041] In the example shown in FIG. 7, the honeycomb rotor 80 has a shaft member 84, and a first sheet 81 and a second sheet 82 wound around the shaft member 84. The first sheet 81 is a flat sheet. The second sheet 82 is a corrugated sheet. The corrugated second sheet 82 can be produced by corrugating a flat resin sheet with a corrugating machine. The honeycomb rotor 80 may be produced by alternately stacking the first sheet 81 and the second sheet 82 one by one. The honeycomb rotor 80 may be produced by alternately stacking two first sheets 81 and two second sheets 82, or by alternately stacking multiple first sheets 81 and two second sheets 82. For example, thermoplastic films such as polypropylene film, polyethylene film, and polyester film, metal foils such as copper foil and aluminum foil, nonwoven fabric, Japanese paper, woven fabric, and porous film may be used as the first sheet 81 and the second sheet 82. The first sheet 81 and the second sheet 82 may be embossed or matte-treated.

[0042] The honeycomb rotor 80 has a carbon dioxide adsorption / desorption ability. In order to impart the carbon dioxide adsorption / desorption ability to the honeycomb rotor 80, the honeycomb rotor 80 supports a carbon dioxide adsorption / desorption agent. Either one or both of the first sheet 81 and the second sheet 82 described above may support the carbon dioxide adsorption / desorption agent. A specific example of the carbon dioxide adsorption / desorption agent is an amine. The honeycomb rotor 80 may be an amine-supported honeycomb rotor that supports an amine. Either one or both of the first sheet 81 and the second sheet 82 described above may support an amine. The first sheet 81 and the second sheet 82 may support an amine on only one surface or on both surfaces.

[0043] Amine is a general term for compounds in which the hydrogen atom of ammonia is replaced with a hydrocarbon group or an aromatic atomic group, and is also called an amino compound. That is, as the amine (amino compound), various compounds having an amino group (NH2-) in the chemical structure can be considered without any particular limitation. Due to the physical and chemical affinity of such amino groups to carbon dioxide, the amine-supported honeycomb rotor can exhibit strong interaction with carbon dioxide, that is, carbon dioxide adsorption. Such amines may be, for example, monoamine types having one amino group in one molecule of amine, or polyamine types having two or more amino groups in one molecule of amine. In addition to carbon dioxide adsorption, when carbon dioxide desorption is considered, amines that are commonly used in the field of carbon dioxide separation and recovery technology can be preferably used as the amine. As such an amine, monoamines or polyamines having three or more amino groups are preferable, and polyamines are more preferable. Furthermore, propylamine, diethylenetriamine, and polyethyleneimine having a number average molecular weight of 800 to 3000, which have two or more amines, may be supported on the honeycomb rotor 80.

[0044] From another perspective, it is also preferable to use aminoorganosilane as the amine. By using aminoorganosilane, the honeycomb rotor 80 can graft-support the amine. By using a method of supporting the amine on the surface layer of the first sheet 81 or the second sheet 82 by chemical reaction, or by supporting silica particles or mesoporous silica on which the amine is graft-supported on the honeycomb rotor, the amine can be effectively prevented from falling off the honeycomb rotor 80 due to evaporation or the like. That is, the amount of amine flowing into the storage chamber 30 can be reduced. Furthermore, although the details of the cause are unknown, the detachment of carbon dioxide adsorbed by the amine from the amine can be effectively promoted by adjusting the flow of gas passing through the through holes 80H of the honeycomb rotor 80. In addition, carbon dioxide adsorbed on the graft-supported amine is more easily desorbed from the amine by blowing a gas than carbon dioxide adsorbed on the amine by impregnation. The reason for this is speculated as follows: In addition to the usual carbamate reaction between amines and carbon dioxide, there is a small amount of carbon dioxide held on the honeycomb rotor due to weak interactions with amines, and this carbon dioxide can suddenly desorb due to slight differences in conditions such as temperature and flow rate. Although the amount of carbon dioxide adsorbed through weak interactions is small compared to the target adsorption and desorption capacity of the carbon dioxide absorbent, even if the desorption is at tens of ppm, by allowing it to continue desorbing within an enclosed space, it is possible to achieve a concentration of approximately several percent. Among these, it is believed that adsorption and desorption were more favorable on the honeycomb rotor in which the amine was supported by the grafting method, in which a uniform amine layer was formed on the honeycomb rotor surface and the contact area between the amine and the gas was large.

[0045] Compounds in which an amino group has been introduced into the organic chain of an organosilane, known as silane coupling agents, etc., have been used. For example, the molecular structure of aminoorganosilane in which one amino group has been introduced into one molecule can be represented by the following general formula (1). H2N-R-Si(OR')3 (1) In the formula (1), R is any functional group such as an alkyl group, a vinyl group, or a glycidoxypropyl group, and R' may be the same or different alkyl groups. More specifically, preferred examples include (3-aminopropyl)trimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-(2-aminoethyl)-3-aminopropyltriethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, 3-triethoxysilyl-N-(1,3-dimethylbutylidene)propylamine, N-phenyl-3-aminopropyltrimethoxysilane, and N-(n-butyl)-3-aminopropyltrimethoxysilane. In addition, for the method of grafting treatment, reference can be made to the description in, for example, Tsuyoshi Watabe "Development of Amine-Modified Solid Sorbents for Postcombustion CO2 Capture" Energy Procedia Vol 37, 2013, 199-204.

[0046] In the example shown in FIG. 4, the refrigerator 12 has a carbon dioxide detector 36 that detects the carbon dioxide concentration in the storage compartments 30, 31, 32, and 33. The carbon dioxide detector 36 is electrically connected to the controller 35 by a wiring 37. The controller 35 is electrically connected to the valve 64, the first blower 63, the second blower 68, and the driver 76 of the carbon dioxide exchanger 70 via the wiring 37. In the example shown in the figure, the operation of the carbon dioxide increase unit 60 is controlled according to the detection result by the carbon dioxide detector 36, that is, according to the carbon dioxide concentration in the storage compartment 30, and thus the carbon dioxide concentration in the storage compartment 30 can be adjusted to a desired concentration. Specifically, based on the detection result of the carbon dioxide concentration by the carbon dioxide detector 36, the presence or absence of rotation of the honeycomb rotor 80 and the rotation speed of the honeycomb rotor 80 are controlled. Based on the detection result of the carbon dioxide detector 36, the opening / closing and the opening degree of each valve 64 are controlled. Based on the detection result of the carbon dioxide detection unit 36, the presence / absence of rotation and the rotation speed of each of the fans 63, 68 are controlled. In particular, in the illustrated example, separate carbon dioxide detection units 36 are provided for the first storage chamber 31, the second storage chamber 32 and the third storage chamber 33. Based on the detection result of the carbon dioxide detection unit 36 ​​corresponding to each of the storage chambers 31, 32, 33, the carbon dioxide concentration in each of the storage chambers 31, 32, 33 can be quickly and accurately adjusted to a concentration suitable for the items stored in the storage chambers 31, 32, 33.

[0047] Next, the operation of the refrigerator 12 (storage facility 10) having the above configuration will be described.

[0048] First, the refrigerator 12 has a cooling unit 40. The cooling unit 40 has a circulation path 41 that circulates the gas in the storage chamber 30. The cooling unit 40 has a heat pump 50 including a heat absorption unit 51. The heat pump 50 absorbs heat in the heat absorption unit 51 from the gas moving in the heat exchange unit 42C of the circulation path 41. The cold air cooled by the heat pump 50 is supplied into the storage chamber 30. This makes it possible to maintain a low temperature inside the storage chamber 30. The food stored in the storage chamber 30 can be stored for a long period of time while suppressing deterioration of the food.

[0049] Next, the refrigerator 12 has a carbon dioxide increasing section 60. The carbon dioxide increasing section 60 has a first flow path 61, a second flow path 66, and a carbon dioxide exchanger 70. As shown in FIG. 4, the first flow path 61 is a circulation flow path for gas in the storage chamber 30, and passes through the carbon dioxide exchanger 70 at a carbon dioxide release position PA. The second flow path 66 is a circulation flow path for outside air, and passes through the carbon dioxide exchanger 70 at a carbon dioxide intake position PB. The carbon dioxide exchanger 70 has a rotatable honeycomb rotor 80. The honeycomb rotor 80 is provided with a through hole 80H. The through hole 80H extends in a first direction D1 along the first flow path 61 and the second flow path 66. The honeycomb rotor 80 has a carbon dioxide adsorption / desorption ability.

[0050] When the second blower 68 is operated, outside air flows through the second flow passage 66. The outside air passes through the through-holes 80H of the honeycomb rotor 80 at the carbon dioxide intake position PB. That is, the outside air passes through the through-holes 80H and moves from the suction tube portion 67A to the discharge tube portion 67B. The through-holes 80H are partitioned by a first sheet 81 and a second sheet 82. The first sheet 81 and the second sheet 82 support a carbon dioxide adsorption / desorption agent, for example, an amine. Therefore, at the carbon dioxide intake position PB, the carbon dioxide in the outside air moving through the first flow passage 61 is adsorbed by the honeycomb rotor 80.

[0051] When the first blower 63 operates, the gas in the storage chamber 30 flows through the first flow path 61. The gas passes through the through-holes 80H of the honeycomb rotor 80 at the carbon dioxide release position PA. That is, the gas passes through the through-holes 80H and moves from the recovery tube portion 62B to the supply tube portion 62A. The wind pressure of the gas flowing through the through-holes 80H causes carbon dioxide to be desorbed from the carbon dioxide adsorption / desorption agent, for example, from the amine. The carbon dioxide desorbed from the honeycomb rotor 80 flows into the storage chamber 30 together with the gas flowing through the first flow path 61.

[0052] As the honeycomb rotor 80 rotates, each portion of the honeycomb rotor 80 alternately reaches the carbon dioxide intake position PB and the carbon dioxide release position PA. That is, the honeycomb rotor 80, which has adsorbed carbon dioxide at the carbon dioxide intake position PB, moves to the carbon dioxide release position PA and releases the adsorbed carbon dioxide. In this way, carbon dioxide in the outside air can be transferred to the storage chamber 30 via the carbon dioxide exchanger 70. This makes it possible to maintain the carbon dioxide concentration in the storage chamber 30 higher than the carbon dioxide concentration in the air.

[0053] In order to make the carbon dioxide concentration in the storage chamber 30 higher than that of air, it is effective to promote the adsorption of carbon dioxide at the carbon dioxide intake position PB and promote the desorption of carbon dioxide at the carbon dioxide release position PA. Specifically, by increasing the flow rate of the gas passing through the through holes 80H, it is possible to promote the desorption of carbon dioxide from the honeycomb rotor 80 and suppress the adsorption of carbon dioxide to the honeycomb rotor 80. By decreasing the flow rate of the gas passing through the through holes 80H, it is possible to suppress the desorption of carbon dioxide from the honeycomb rotor 80 and promote the adsorption of carbon dioxide to the honeycomb rotor 80. As a result of intensive research by the present inventors, the phenomenon in which the desorption and adsorption of carbon dioxide are affected by the flow rate is more noticeable in the honeycomb rotor 80 on which an amine is grafted, for example, in the honeycomb rotor 80 on which an amine is grafted using a silane coupling agent.

[0054] Therefore, the output of the first blower 63 may be increased to increase the flow rate of the gas passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide discharge position PA. This makes it possible to promote desorption of carbon dioxide rather than adsorption of carbon dioxide at the carbon dioxide discharge position PA. The output of the second blower 68 may be reduced to slow the flow rate of the outside air passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide intake position PB. This makes it possible to promote adsorption of carbon dioxide rather than desorption of carbon dioxide at the carbon dioxide intake position PB.

[0055] Furthermore, the flow velocity of the gas passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide release position PA may be made faster than the flow velocity of the gas passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide intake position PB. By making the flow velocity at the carbon dioxide release position PA faster than the flow velocity at the carbon dioxide intake position PB, it is possible to promote desorption of carbon dioxide at the carbon dioxide release position PA more than at the carbon dioxide intake position PB.

[0056] The flow rate at the carbon dioxide discharge position PA and the flow rate at the carbon dioxide intake position PB can be adjusted by controlling the output of the blowers 63, 68. The flow rate at the carbon dioxide discharge position PA and the flow rate at the carbon dioxide intake position PB can also be adjusted by adjusting the flow path cross-sectional area instead of or in addition to controlling the output of the blowers 63, 68. The flow rate can be increased by reducing the flow path cross-sectional area. The flow rate can be decreased by increasing the flow path cross-sectional area. For example, in the example shown in FIG. 9, the opening area of ​​the first opening 73A of the casing 72 to which the first flow path 61 is connected is smaller than the opening area of ​​the second opening 73B of the casing 72 to which the second flow path 66 is connected. According to this example, the flow path cross-sectional area of ​​the first flow path 61 at the carbon dioxide discharge position PA can be smaller than the flow path cross-sectional area of ​​the second flow path 66 at the carbon dioxide intake position PB. According to this example, the flow rate of the gas passing through the honeycomb rotor 80 at the carbon dioxide discharge position PA can be made faster than the flow rate of the gas passing through the honeycomb rotor 80 at the carbon dioxide intake position PB.

[0057] The flow path cross-sectional area of ​​the first flow path 61 may be smaller at the carbon dioxide release position PA than at positions other than the carbon dioxide release position PA. That is, the flow path cross-sectional area of ​​the first flow path 61 at the carbon dioxide release position PA may be smaller than the flow path cross-sectional area of ​​the supply tube portion 62A and smaller than the flow path cross-sectional area of ​​the recovery tube portion 62B. According to this example, the flow velocity of the gas moving in the first flow path 61 can be locally increased at the carbon dioxide release position PA.

[0058] Also, the flow passage cross-sectional area of ​​the second flow passage 66 may be larger at the carbon dioxide intake position PB than at positions other than the carbon dioxide intake position PB. That is, the flow passage cross-sectional area of ​​the second flow passage 66 at the carbon dioxide intake position PB may be larger than the flow passage cross-sectional area of ​​the suction tube portion 67A and larger than the flow passage cross-sectional area of ​​the discharge tube portion 67B. According to this example, the flow velocity of the outside air moving through the second flow passage 66 can be locally reduced at the carbon dioxide intake position PB.

[0059] Furthermore, by increasing the flow rate of gas passing through the carbon dioxide release position PA per unit time, it is possible to promote desorption of carbon dioxide from the honeycomb rotor 80 and suppress adsorption of carbon dioxide to the honeycomb rotor 80. By decreasing the flow rate of gas passing through the carbon dioxide intake position PB per unit time, it is possible to suppress desorption of carbon dioxide from the honeycomb rotor 80 and promote adsorption of carbon dioxide to the honeycomb rotor 80. As a result of extensive research by the present inventors, it was found that the phenomenon in which desorption and adsorption of carbon dioxide are affected by the flow rate is more pronounced in a honeycomb rotor 80 on which an amine is grafted, for example, in a honeycomb rotor 80 on which an amine is grafted using a silane coupling agent.

[0060] Therefore, the output of the first blower 63 may be increased to increase the flow rate of gas passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide discharge position PA. This makes it possible to promote desorption of carbon dioxide rather than adsorption of carbon dioxide at the carbon dioxide discharge position PA. The output of the second blower 68 may be reduced to decrease the flow rate of outside air passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide intake position PB. This makes it possible to promote adsorption of carbon dioxide rather than desorption of carbon dioxide at the carbon dioxide intake position PB.

[0061] Furthermore, the flow rate of gas passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide release position PA may be made greater than the flow rate of gas passing through the through holes 80H of the honeycomb rotor 80 at the carbon dioxide intake position PB. By making the flow rate at the carbon dioxide release position PA greater than the flow rate at the carbon dioxide intake position PB, it is possible to promote desorption of carbon dioxide at the carbon dioxide release position PA more than at the carbon dioxide intake position PB.

[0062] Here, in the example shown in FIG. 10, separate first flow paths 61 are assigned to the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33. According to the example shown in FIG. 10, the amount of gas circulating through each of the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33 can be sufficiently secured. This allows the carbon dioxide concentration in the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33 to be maintained at a high concentration. In addition, in the example shown in FIG. 10, separate carbon dioxide release positions PA are prepared for each first flow path 61. The area of ​​each carbon dioxide release position PA is smaller than the area of ​​the carbon dioxide intake position PB. Therefore, in the first flow paths 61 corresponding to each of the first storage chamber 31, the second storage chamber 32, and the third storage chamber 33, the flow rate at the carbon dioxide release position PA increases, and desorption of carbon dioxide at the carbon dioxide release position PA can be promoted.

[0063] Furthermore, the adsorption efficiency of carbon dioxide is most efficient in terms of gas diffusion and carbamate formation in a temperature range of 20°C (room temperature) to 60°C. On the other hand, in a temperature range of 60°C or less, for example, a temperature range of -10°C to 30°C, carbon dioxide that has once formed carbamate does not desorb, and the desorption efficiency of carbon dioxide does not change significantly depending on temperature. However, after extensive research by the present inventors, it was found that the adsorption amount and desorption amount at that temperature were more significant in the honeycomb rotor 80 on which an amine was grafted, for example, in the honeycomb rotor 80 on which an amine was grafted using a silane coupling agent.

[0064] When the storage 10 is applied to the refrigerator 12, the gas moving through the first flow path 61 becomes cooled gas in the storage chamber 30. Therefore, the temperature of the gas passing through the honeycomb rotor 80 at the carbon dioxide discharge position PA becomes 20°C or lower. That is, at the carbon dioxide discharge position PA, the adsorption of carbon dioxide can be effectively suppressed. Therefore, the carbon dioxide concentration in the storage chamber 30 of the refrigerator 12 can be stably maintained at a high concentration.

[0065] Particularly, in application of the storage 10 to the refrigerator 12, the temperature of the gas passing through the first flow path 61 is lower than the temperature of the gas passing through the second flow path 66. In other words, the temperature of the gas passing through the second flow path 66 is higher than the temperature of the gas passing through the first flow path 61. According to this example, adsorption of carbon dioxide can be promoted more at the carbon dioxide absorption position PB than at the carbon dioxide release position PA.

[0066] From the viewpoint of promoting the adsorption of carbon dioxide at the carbon dioxide intake position PB, the outside air moving in the suction tube 67A may be actively heated. In this example, the temperature of the outside air moving toward the carbon dioxide intake position PB is adjusted to 20°C or more and 60°C or less, thereby promoting the adsorption of carbon dioxide at the carbon dioxide intake position PB. In the example shown in FIG. 11, the outside air in the suction tube 67A moving toward the carbon dioxide exchanger 70 is heated by the heat released from the heat radiating section 52 of the heat pump 50. As a specific configuration, the suction tube 67A is configured so that the outside air flows around the heat radiating section 52. According to the example shown in FIG. 11, the outside air moving toward the carbon dioxide intake position PB can be heated without adding energy from outside the refrigerator 12, which is also advantageous in terms of energy efficiency.

[0067] In the example shown in FIG. 11, the first flow path 61 of the carbon dioxide increasing section 60 also functions as the circulation path 41 of the cooling section 40. That is, the first flow path 61 is also used as the circulation path 41. According to this example, the first blower 63 and the blower 43 are both used, so that the energy efficiency can be improved. The number of flow paths connected to the storage chamber 30 is reduced, and the airtightness of the storage chamber 30 is improved. This improves the cooling efficiency of the cooling section 40, and the energy efficiency can be further improved. In addition, the first flow path 61 and the circulation path 41 are both used, so that the refrigerator 12 (storage compartment 10) can be made smaller in size.

[0068] Incidentally, a catalyst containing platinum may be provided in the storage chamber 30. When the honeycomb rotor 80 supports an amine, it is possible that the amine falls off the honeycomb rotor 80 and is released into the storage chamber 30. The catalyst containing platinum can decompose the amine. Therefore, the influence of the amine on the stored matter in the storage chamber 30 can be suppressed. The catalyst containing platinum can also remove ethylene. This makes it possible to suppress the influence of ethylene on the stored matter in the storage chamber 30. However, according to the research of the present inventor, when the amine is graft-supported using a silane coupling agent or the like, it is possible to effectively suppress the disappearance of the amine supported on the honeycomb rotor 80 from the honeycomb rotor 80 due to evaporation or the like.

[0069] In the embodiment described above, the storage facility 10 has a storage chamber 30 for storing food, and a carbon dioxide increasing section 60 for increasing the carbon dioxide concentration in the storage chamber 30. The carbon dioxide increasing section 60 has a first flow path 61 for circulating the gas in the storage chamber 30, a second flow path 66 for circulating the outside air, and a honeycomb rotor 80 that is rotatable between a carbon dioxide discharging position PA corresponding to the first flow path 61 and a carbon dioxide absorbing position PB corresponding to the second flow path 66 and has a carbon dioxide adsorption / desorption function. According to this embodiment, carbon dioxide is adsorbed to the honeycomb rotor 80 at the carbon dioxide absorbing position PB by the outside air flowing through the second flow path 66. Carbon dioxide is desorbed from the honeycomb rotor 80 at the carbon dioxide discharging position PA by the gas in the storage chamber 30 flowing through the first flow path 61. Therefore, carbon dioxide outside the storage chamber 30 can be supplied into the storage chamber 30 to increase the carbon dioxide concentration in the storage chamber 30. That is, the oxygen concentration in the storage chamber 30 can be increased without requiring an oxidation reaction that consumes oxygen in the storage chamber 30. Also, the carbon dioxide concentration in the storage chamber 30 can be increased without significantly degrading the energy efficiency associated with the storage facility 10. By increasing the carbon dioxide concentration in the storage chamber 30, the quality retention period of the food and other stored items stored in the storage chamber 30 can be extended, which can contribute to reducing food loss.

[0070] In one specific example of the embodiment described above, the honeycomb rotor 80 is an amine honeycomb rotor carrying an amine. The amine can be graft-supported using a silane coupling agent. The amine is supported on the surface layer of the honeycomb rotor 80 by a chemical reaction, so that the amine can be effectively prevented from being released from the honeycomb rotor 80. Therefore, the release of the amine into the storage chamber 30 or outside the storage can be effectively prevented. In addition, the carbon dioxide can be efficiently desorbed from the honeycomb rotor 80 by blowing gas toward the honeycomb rotor 80. This allows the carbon dioxide concentration in the storage chamber 30 to be stably maintained at a high concentration.

[0071] In one specific example of the embodiment described above, the temperature of the gas passing through the first flow passage 61 is lower than the temperature of the gas passing through the second flow passage 66. In this specific example, since the temperature of the gas in the first flow passage 61 is low, it is possible to effectively prevent the carbon dioxide contained in the gas in the first flow passage 61 from being adsorbed onto the honeycomb rotor 80 at the carbon dioxide release position PA. Therefore, the carbon dioxide concentration in the storage chamber 30 can be stably maintained at a high concentration.

[0072] In one specific example of the embodiment described above, the flow rate of the gas passing through the honeycomb rotor 80 at the carbon dioxide discharge position PA is faster than the flow rate of the gas passing through the honeycomb rotor 80 at the carbon dioxide intake position PB. Since the flow rate of the gas passing through the honeycomb rotor 80 at the carbon dioxide discharge position PA is faster, it is possible to effectively promote the desorption of carbon dioxide from the honeycomb rotor 80 at the carbon dioxide discharge position PA. Since the flow rate of the gas passing through the honeycomb rotor 80 at the carbon dioxide intake position PB is slow, it is possible to effectively suppress the desorption of carbon dioxide from the honeycomb rotor 80 at the carbon dioxide intake position PB. Therefore, the carbon dioxide concentration in the storage chamber 30 can be stably maintained at a high concentration.

[0073] In one specific example of the embodiment described above, the storage facility 10 has a heat pump 50 used for cooling the inside of the storage chamber 30. The gas moving toward the carbon dioxide absorption position PB is heated by heat radiation from the heat pump 50. Therefore, the temperature of the gas passing through the honeycomb rotor 80 at the carbon dioxide absorption position PB can be increased to a high temperature, and the adsorption of carbon dioxide to the honeycomb rotor 80 at the carbon dioxide absorption position PB can be effectively promoted. This allows the carbon dioxide concentration in the storage chamber 30 to be stably maintained at a high concentration.

[0074] Although one embodiment has been described with reference to a specific example, the above-mentioned specific example does not limit the embodiment. The above-mentioned embodiment can be embodied in various other specific examples, and various omissions, substitutions, changes, additions, etc. can be made without departing from the spirit of the embodiment. [Explanation of symbols]

[0075] PA: carbon dioxide release position, PB: carbon dioxide absorption position, 10: storage, 12: refrigerator, 20: storage body, 25: closure, 30: storage chamber, 31: first storage chamber, 32: second storage chamber, 33: third storage chamber, 35: controller, 36: carbon dioxide detection unit, 37: wiring, 40: cooling unit, 41: circulation path, 42A: supply tube unit, 42B: recovery tube unit, 42C: heat exchange unit, 43: blower, 50: heat pump, 51: heat absorption unit, 52: heat radiation unit, 56: compressor, 57: condenser, 58: expansion Valve, 59: evaporator, 60: carbon dioxide increasing section, 61: first flow path, 62A: supply tube section, 62B: recovery tube section, 63: first blower, 64: valve, 66: second flow path, 67A: suction tube section, 67B: discharge tube section, 68: second blower, 70: carbon dioxide exchange device, 72: casing, 73A: first opening, 73B: second opening, 74: intermediate frame section, 74H: through hole, 76: driver, 80: honeycomb rotor, 80H: through hole, 81: first sheet, 82: second sheet, 84: shaft member

Claims

1. A storage facility having a storage chamber for storing food, a carbon dioxide increasing section for increasing a carbon dioxide concentration in the storage chamber, and a heat pump for cooling the storage chamber, The carbon dioxide increasing section is A first flow path for circulating gas in the storage chamber; a second flow path through which outside air passes; a honeycomb rotor that is rotatable between a carbon dioxide release position corresponding to the first flow path and a carbon dioxide intake position corresponding to the second flow path and has a carbon dioxide adsorption / desorption function; A storage facility characterized in that gas moving toward the carbon dioxide intake position is heated by heat released from the heat pump.

2. 2. The reservoir of claim 1, wherein the honeycomb rotor is an amine-loaded amine honeycomb rotor.

3. The storage facility according to claim 1 or 2, wherein the honeycomb rotor is an amine-grafted honeycomb rotor having an amine grafted thereon.

4. The storage facility according to any one of claims 1 to 3, wherein the temperature of the gas passing through the first flow path is lower than the temperature of the gas passing through the second flow path.

5. The storage facility according to any one of claims 1 to 4, wherein the flow rate of gas passing through the honeycomb rotor at the carbon dioxide release position is faster than the flow rate of gas passing through the honeycomb rotor at the carbon dioxide intake position.

6. The storage facility according to any one of claims 1 to 5, further comprising a catalyst containing platinum disposed within the storage chamber.

7. A carbon dioxide detection means for detecting a carbon dioxide concentration in the storage chamber is provided, 7. The storage facility according to claim 1, wherein the presence or absence of rotation of the honeycomb rotor and the rotation speed of the honeycomb rotor are controlled based on the result of detection of the carbon dioxide concentration by the carbon dioxide detection means.

8. The storage facility according to any one of claims 1 to 7, wherein the storage facility is a refrigerator.

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