JP2021066449A - Storage - Google Patents

Abstract

To provide a storage capable of keeping freshness of an object for a long time.SOLUTION: A container 1 includes: a container body 2 having a storage chamber 20 for storing an object; and an electrode 5 provided in the storage chamber 20 and used to form an electric field in the storage chamber 20. The electrode 5 has: support parts 51, 52 supported by an inner wall of the storage chamber 20; and a protruding part 53 protruding from the support parts 51, 52 into the storage chamber 20. A clearance D1 between the protruding part 53 and the inner wall is larger than a clearance D2 between the support parts 51, 52 and the inner wall.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vault.

As described in Patent Document 1, by forming an electric field in a container as a storage and storing the fresh food in this electric field forming atmosphere, the freshness of the fresh food can be improved as compared with the case where no electric field is formed. It is known that it can be kept for a long time. In the container of Patent Document 1, a plate-shaped electrode in which a large number of small holes are regularly formed is used as an electrode for forming an electric field in the container, and this electrode is used as a floor surface, a side surface, or a ceiling in the container. It has a structure provided on the surface.

Japanese Unexamined Patent Publication No. 2012-250773

However, in Patent Document 1, since the electrode for forming the electric field has a flat plate shape, the separation distance between the electrode and the inner surface of the container tends to be small. Therefore, an electric field is likely to be formed between the electrode and the inner surface of the container, and it is difficult to efficiently apply the electric field to the fresh food in the cooling container.

An object of the present invention is to provide a storage capable of efficiently applying an electric field to a contained object (particularly fresh food) to keep the object fresh for a longer period of time.

Such an object is achieved by the following invention.

(1) A storage body having a storage room for accommodating an object, and
It is provided in the containment chamber and has an electrode for forming an electric field in the containment chamber.
The electrodes include a support portion supported on the inner wall of the storage chamber and a support portion.
It has a protrusion protruding from the support portion toward the accommodation chamber, and has a protrusion.
A storage chamber characterized in that the separation distance between the protruding portion and the inner wall is larger than the separation distance between the support portion and the inner wall.

(2) The storage chamber according to (1) above, wherein the electrodes are provided on the ceiling surface of the storage chamber.

(3) The storage according to (2) above, wherein the protruding portion has a flat plate-shaped base provided along the ceiling surface.

(4) The storage according to (3) above, wherein the base portion has a recessed portion recessed on the ceiling surface side.

(5) The storage according to any one of (1) to (4) above, which is interposed between the electrode and the storage body and has an insulator that insulates the electrode and the storage body.

(6) A support member fixed to the storage body via the insulator and having an insertion hole into which the support portion can be inserted.
The above (5), wherein the support portion is inserted into the insertion hole together with the support portion, and the support portion is sandwiched between the support member and the support member to fix the support portion to the support member. Storage.

(7) The storage according to any one of (1) to (6) above, wherein the state of the electric field changes with time.

(8) Having a plurality of the above electrodes
The storage according to any one of (1) to (7) above, wherein different voltages are applied to the plurality of electrodes.

According to the present invention as described above, since the separation distance between the storage chamber main body and the protruding portion of the electrode can be increased, an electric field can be effectively formed in the storage chamber. Therefore, an electric field can be efficiently applied to the object (particularly fresh food) housed in the storage chamber, and the freshness of the object can be maintained for a longer period of time.

It is a perspective view which shows the whole of the container which concerns on 1st Embodiment. It is sectional drawing which shows the inside of the container body. It is a top view which shows the electric field forming apparatus provided in the container body. It is sectional drawing which shows the fixture and electrode which the electric field generator has. It is sectional drawing which shows the fixture and the electrode which the electric field generator has. It is sectional drawing which shows the deformation example of an electrode. It is sectional drawing which shows the deformation example of an electrode. It is sectional drawing which shows the deformation example of an electrode. It is sectional drawing which shows the fixture and the electrode which the electric field generator has. It is sectional drawing which shows the fixture and the electrode which the electric field generator has. It is sectional drawing which shows the windbreak member provided inside the container body. It is sectional drawing which shows the windbreak member provided inside the container body. It is sectional drawing for demonstrating the effect of an electrode. It is sectional drawing which shows the fixture and the electrode which the electric field generator of the container which concerns on 2nd Embodiment has. It is a side view of the fixture shown in FIG. It is a figure which shows the voltage applied to the electrode of the container which concerns on 3rd Embodiment. It is a figure which shows the voltage applied to the electrode of the container which concerns on 3rd Embodiment. It is a figure which shows the voltage applied to the electrode of the container which concerns on 3rd Embodiment. It is a figure which shows the voltage applied to the electrode of the container which concerns on 3rd Embodiment. It is a top view which shows the electrode provided in the container which concerns on 5th Embodiment. It is a figure which shows the voltage applied to an electrode.

<First Embodiment>
The container 1 (storage) shown in FIG. 1 is a mobile container mounted on a truck, a ship, an airplane, or the like. Further, the container 1 is a reefer container, and forms an electric field in a container main body 2 (storage main body) having a storage chamber 20 for accommodating an object, a cooling device 3 for cooling the inside of the storage chamber 20, and a storage chamber 20. It has an electric field forming device 4 and a windbreak member 8 that blocks the wind toward the electrode 5 of the electric field forming device 4. The container 1 is configured to comply with an international standard (ISO standard), for example, and is, for example, a "20-foot container" having a total length of 20 feet or a "40-foot container" having a total length of 40 feet. As described above, the container 1 having excellent convenience and versatility, and further having sufficient reliability, has a configuration conforming to the international standard.

However, the container 1 does not necessarily have to comply with an international standard (ISO standard), and the shape of the container 1 is not particularly limited. Further, the container 1 may not be a mobile container but a fixed container used by being fixed to a store, a warehouse, or the like. Further, for example, it may be installed on a loading platform such as a truck. Further, the storage is not limited to the container 1, and can be applied to, for example, a cooling warehouse, a refrigerator, and the like.

The object is not particularly limited, and for example, seafood such as fish, shrimp, crab, squid, octopus, and shellfish, processed foods thereof, fruits such as strawberries, apples, bananas, tangerines, grapes, and pears, and these. Examples thereof include processed foods, vegetables such as cabbage, lettuce, cucumber and tomato, processed foods thereof, fresh foods such as meat such as beef, pork, chicken and horse meat, and various dairy products such as milk, cheese and yogurt. Among these, the object is particularly preferably fresh food. In the following, the object will be described as fresh food.

The container body 2 is grounded when in use. That is, it is connected to the ground. Further, the container main body 2 has a substantially rectangular parallelepiped shape extending in the depth direction, and a storage chamber 20 for accommodating an object is provided inside the container main body 2. The container main body 2 is mainly composed of an inner wall, an outer wall, and a heat insulating material provided between the inner wall and the outer wall, and the accommodation chamber 20 is sufficiently heat-insulated and is not easily affected by the outside air temperature. It has become. With such a configuration, the inside of the accommodation chamber 20 can be efficiently cooled by the cooling device 3. Although not particularly limited, the inner wall and the outer wall can be made of various metals such as stainless steel and aluminum, respectively.

Further, a pair of double doors 21 and 22 are provided at the front end of the container body 2 on the front side in FIG. 1. Then, by opening the doors 21 and 22, the object can be carried in or out of the storage room 20. However, the arrangement and configuration of the doors 21 and 22 are not particularly limited. On the other hand, a cooling device 3 is provided at the inner end of FIG. 1 of the container body 2. In the container 1 of the present embodiment, the wall located at the inner end of FIG. 1 of the container body 2 is composed of the panel of the cooling device 3, but the wall is not limited to this and is the wall of the container body 2. It may be composed of.

As shown in FIG. 2, the cooling device 3 is provided at the end of the accommodation chamber 20 on the back side when viewed from the doors 21 and 22 side, and has a suction unit 31 for sucking air in the storage chamber 20 and a suction unit 31 for sucking air. A cooling device 32 that cools the air sucked from the unit 31, a blowout unit 33 that blows out the air cooled by the cooling device 32, that is, cold air into the accommodation chamber 20, and a temperature sensor 34 that detects the temperature inside the accommodation chamber 20. Have.

The blowing portion 33 is provided near the floor surface 202 of the accommodation chamber 20, and blows cold air toward the floor surface 202. The cold air blown out from the blowout portion 33 flows along the plurality of grooves 24 formed along the longitudinal direction of the container body 2 on the floor surface 202 of the storage chamber 20, and hits or before the doors 21 and 22. It rises and reaches the ceiling surface 201 of the containment chamber 20. On the other hand, the suction unit 31 is provided near the ceiling surface 201 of the accommodation chamber 20 and sucks the cold air that has risen from the floor surface 202 to the ceiling surface 201 or its vicinity. Further, the temperature of the cold air and the air volume are controlled so that the temperature in the accommodation chamber 20 detected by the temperature sensor 34 becomes the target temperature.

According to such a configuration, cold air can be efficiently circulated over the entire area of the accommodation chamber 20, and the temperature inside the accommodation chamber 20 can be maintained at the target temperature, so that the accommodation chamber 20 is accommodated. The object X can be cooled evenly and appropriately. The settable temperature in the accommodation chamber 20 is not particularly limited, but is preferably about −30 ° C. to + 30 ° C., for example. However, the configuration and arrangement of the cooling device 3 is not particularly limited as long as the inside of the accommodation chamber 20 can be cooled.

The electric field forming device 4 has a function of forming an electric field in the accommodating chamber 20 and causing the formed electric field to act on an object accommodated in the accommodating chamber 20. As shown in FIG. 3, such an electric field forming device 4 includes a plurality of electrodes 5 provided in the accommodation chamber 20, a fixture 6 for fixing each electrode 5 to the ceiling surface 201 of the accommodation chamber 20, and each of them. It has a voltage applying device 7 for applying a driving voltage for forming an electric field to the electrode 5.

The fixture 6 has a plurality of fixed rail pairs 60 for fixing one electrode 5 to the ceiling surface 201 of the accommodation chamber 20. The plurality of fixed rail pairs 60 are arranged side by side in a matrix along the longitudinal direction and the width direction of the container body 2. Further, the adjacent fixed rail pairs 60 are provided apart from each other and are electrically insulated from each other.

In the present embodiment, three fixed rail pairs 60 are arranged side by side along the width direction of the container body 2, and eight fixed rail pairs 60 are arranged side by side along the longitudinal direction of the container body 2. That is, a total of 24 fixed rail pairs 60 are regularly provided on the ceiling surface 201. However, the number and arrangement of the fixed rail pairs 60 are not particularly limited, and can be appropriately set according to the size, application, and the like of the container body 2.

Next, the configuration of the fixed rail pair 60 will be described. Since each fixed rail pair 60 has the same configuration as each other, one fixed rail pair 60 will be described as a representative, and the remaining fixed rail pair 60 will be described below. The description of 60 will be omitted. As shown in FIG. 4, the fixed rail pair 60 has a pair of fixed rails 61, 65 that support one corresponding electrode 5. The fixed rails 61 and 65 are fixed to the ceiling surface 201 of the accommodation chamber 20, respectively. Further, the fixed rails 61 and 65 are provided side by side in the width direction of the container body 2, and extend parallel to each other along the longitudinal direction of the container body 2, respectively.

The fixed rail 61 has a conductive electrode support rail 62 (support member) and an insulating insulating block 63 (insulator) interposed between the electrode support rail 62 and the ceiling surface 201, and the insulating block 63. The ceiling surface 201, that is, the container body 2 and the electrode support rail 62 are insulated from each other. The insulating block 63 has a block-shaped first portion 631 and a plate-shaped second portion 632. These first and second portions 631 and 632 are made of separate bodies and are fixed by, for example, screws or the like. Similarly, the fixed rail 65 has a conductive electrode support rail 66 and an insulating insulating block 67 interposed between the electrode support rail 66 and the ceiling surface 201, and the insulating block 67 causes the ceiling surface 201, that is, the ceiling surface 201. The container body 2 and the electrode support rail 66 are insulated. The insulating block 67 has a block-shaped first portion 671 and a plate-shaped second portion 672. These first and second portions 671 and 672 are formed as separate bodies and are fixed by, for example, screws or the like.

Although not shown, in the present embodiment, the insulating blocks 63 and 67 are screwed to the ceiling surface 201, and the electrode support rails 62 and 66 are screwed to the insulating blocks 63 and 67. However, the method of fixing the insulating blocks 63 and 67 to the ceiling surface 201 and the method of fixing the electrode support rails 62 and 66 to the insulating blocks 63 and 67 are not particularly limited.

Further, the constituent materials of the electrode support rails 62 and 66 are not particularly limited as long as they have conductivity, and for example, various metal materials such as aluminum and stainless steel can be used. The constituent materials of the insulating blocks 63 and 67 are not particularly limited as long as they have insulating properties, and for example, various resin materials such as polyvinyl chloride (PVC), various ceramic materials such as alumina and titania, and the like. Quartz-based porcelain materials, various glass materials, and the like used for insulators can be used.

The electrode support rail 62 has an insertion hole 621 extending along the longitudinal direction thereof, penetrating both end surfaces in the longitudinal direction, and opening on the side surface on the electrode support rail 66 side. That is, the electrode support rail 62 has a substantially C-shaped cross-sectional shape, and the side opening 621a is tubular so as to face the other electrode support rail 66 side. Similarly, the electrode support rail 66 has an insertion hole 661 that extends along its longitudinal direction, penetrates both end faces in the longitudinal direction, and opens on the side surface of the electrode support rail 62 side. That is, the electrode support rail 66 has a substantially C-shaped cross-sectional shape, and the side opening 661a is tubular so as to face the other electrode support rail 62 side. The support portions 51 and 52 of the electrode 5, which will be described later, are inserted into the insertion holes 621 and 661.

Here, the description of the electrode 5 will be once started. As described above, a total of 24 fixed rail pairs 60 are provided, three along the width direction of the container body 2 and eight along the longitudinal direction of the container body 2, and one for each of these fixed rail pairs 60. One electrode 5 is fixed. That is, three electrodes 5 are provided along the width direction of the container body 2, and eight electrodes 5 are provided along the longitudinal direction of the container body 2, for a total of 24 electrodes.

However, the present invention is not limited to this, and for example, a plurality of electrodes 5 may be fixed to one fixed rail pair 60, or conversely, one electrode 5 may be fixed to a plurality of fixed rail pairs 60. Good. Further, the electrodes 5 do not have to be regularly arranged in a matrix, and for example, the electrodes 5 may be thinned out in some places from a 3 × 8 matrix.

Since each of these electrodes 5 has the same configuration as each other, one electrode 5 will be described as a representative below, and the description of the remaining electrodes 5 will be omitted. As shown in FIG. 4, the electrode 5 is provided on the ceiling surface 201 of the accommodation chamber 20 via the fixed rail pair 60. By providing the electrode 5 on the ceiling surface 201, it is possible to secure a wider accommodating space 200 (see FIG. 2) for the object formed between the floor surface 202 and the electrode 5. Further, for example, when the object is carried in or out of the storage chamber 20 using a forklift or the like, the electrode 5 is less likely to get in the way, and the loading and unloading can be performed safely and smoothly. be able to. However, the arrangement of the electrodes 5 is not particularly limited, and for example, the electrodes 5 may be provided on the side surface (one side or both sides) of the accommodation chamber 20 via the fixed rail pair 60, or may be provided on the floor surface 202 via the fixed rail pair 60. It may be provided through.

Further, the electrode 5 is provided in the accommodation chamber 20 in a bare state, that is, in a bare state. In other words, the electrode 5 is not housed or covered by another member. As a result, unnecessary members are not arranged around the electrode 5, and the accommodation space 200 can be secured wider.

Further, the electrode 5 is formed by bending a conductive plate material into a mountain fold or a valley fold along a fold line extending in the longitudinal direction of the container body 2. The electrode 5 has a substantially Ω-shaped cross-sectional shape, and has a longitudinal shape extending along the longitudinal direction of the container body 2. The constituent material of the electrode 5 is not particularly limited as long as it has conductivity, and for example, various metal materials such as aluminum and stainless steel can be used.

The electrodes 5 are located between a pair of support portions 51, 52 provided side by side in the width direction (width direction of the container body 2) and these support portions 51, 52, and are located below the support portions 51, 52. It has a projecting portion 53 projecting toward.

The projecting portion 53 has a downwardly convex convex shape in which both ends in the width direction are bent upward, and the base portion 531 located at the center portion in the width direction, and one end portion in the width direction and one support portion 51 of the base portion 531. It has a connecting portion 532 for connecting the base portion 531 and a connecting portion 533 for connecting the other end portion of the base portion 531 in the width direction and the other supporting portion 52. The base portion 531 has a flat plate shape and is provided substantially parallel to the ceiling surface 201. Further, the upper surface of the base portion 531 is located below the lower surfaces of the support portions 51 and 52. Therefore, the separation distance D1 between the projecting portion 53 and the ceiling surface 201 is larger than the separation distance D2 between the support portions 51 and 52 and the ceiling surface 201. That is, the relationship is D1> D2. The separation distance D1 means the average separation distance between the protrusion 53 and the ceiling surface 201, and the separation distance D2 means the average separation distance between the support portions 51 and 52 and the ceiling surface 201.

Further, the base portion 531 is formed with a plurality of recessed portions 531a slightly recessed on the ceiling surface 201 side. Each of the plurality of recessed portions 531a has a longitudinal shape extending in the width direction of the electrode 5, and is regularly provided at equal intervals in the longitudinal direction of the electrode 5. As shown in FIG. 5, each recessed portion 531a has a recessed amount of about the thickness of the electrode 5, and is formed sufficiently shallower than the protruding amount of the protruding portion 53. Therefore, the base portion 531 also satisfies the above-mentioned relationship D1> D2 in each recessed portion 531a. The recessed portion 531a may be omitted.

Both the connecting portions 532 and 533 are flat plates, and are inclined with respect to the base portion 531 so that the inclination angle θ with respect to the base portion 531 is less than 90 °. That is, the connecting portions 532 and 533 are provided in a tapered shape in which the separation distance from each other decreases from the ceiling surface 201 side toward the floor surface 202 side. Therefore, the protruding portion 53 has a trapezoidal shape. The inclination angle θ is not particularly limited and may be 90 ° or more.

The support portion 51 is located between a substantially U-shaped groove forming portion 511 having a groove 511a that opens downward and has a groove 511a along the fixed rail 61, and the groove forming portion 511 and the connecting portion 532, and is located on the ceiling surface 201. It has a substantially parallel flat plate-shaped flat portion 512. Similarly, the support portion 52 is located between a substantially U-shaped groove forming portion 521 having a groove 521a that opens downward and has a groove 521a along the fixed rail 65, and the groove forming portion 521 and the connecting portion 533, and is located on the ceiling. It has a flat plate-shaped flat portion 522 substantially parallel to the surface 201.

The configuration of the electrode 5 has been described above. As described above, in the present embodiment, the electrode 5 is formed by bending the plate-shaped electrode member, but the method for forming the electrode 5 is not particularly limited. For example, the electrode 5 may be formed by extrusion molding. Further, in the present embodiment, the thickness of the electrode 5 is substantially uniform over the entire area, but the thickness is not limited to this, and a part of the electrode 5 may have a thickness different from that of the other parts.

Further, in the present embodiment, the protruding portion 53 is bent into a trapezoidal shape, but the shape of the protruding portion 53 is not particularly limited as long as it protrudes downward from the support portions 51 and 52. For example, FIG. As shown in FIG. 7, the shape may be curved downward in a semi-cylindrical shape, or as shown in FIG. 7, the shape may be bent in a V shape such that the base 531 is omitted. Further, in the present embodiment, the electrode 5 is in an exposed state, but the present invention is not limited to this, and for example, as shown in FIG. 8, an insulating film 59 may be provided on the lower surface of the electrode 5. As a result, contact between the object X housed in the storage chamber 20 and the electrode 5 is prevented, and the safety of the container 1 is enhanced.

In the electrode 5 having such a configuration, as shown in FIGS. 4 and 5, the support portion 51 is inserted into the insertion hole 621 of the electrode support rail 62, and the support portion 52 is inserted into the insertion hole 661 of the electrode support rail 66. Rail. By inserting the support portions 51 and 52 into the insertion holes 621 and 661 in this way, the electrode 5 can be supported by the fixed rails 61 and 65 with a simple configuration. As described above, since the insertion holes 621 and 661 are open at both ends of the electrode support rails 62 and 66, for example, the support portions 51 and 52 are inserted from the openings on the doors 21 and 22 of the container body 2. By inserting into the holes 621 and 661, the electrode 5 can be easily mounted on the fixed rails 61 and 65.

Returning to the description of the fixed rail pair 60, as shown in FIGS. 4 and 5, the insertion holes 621 and 661 are provided with respect to the support portions 51 and 52 so that the support portions 51 and 52 are slidable inside the insertion holes 621 and 661. It is formed large enough. Therefore, the positioning of the electrode 5 in the accommodation chamber 20 becomes easy. Further, as shown in FIG. 5, the width W of the openings 621a and 661a of the insertion holes 621 and 661 is larger than the thickness T of the flat portions 512 and 522 of the support portions 51 and 52, and the groove forming portions 511 and 521 It is smaller than the height H. That is, the relationship of T <W <H is satisfied. By satisfying such a relationship, the support portions 51 and 52 can be slidable in the insertion holes 621 and 661, and the support portions 51 and 52 can be moved out of the insertion holes 621 and 661 through the openings 621a and 661a. Withdrawal can be prevented.

As shown in FIGS. 4 and 5, the fixing rail 61 further has a long electrode fixing rail 64 (fixing member) inserted into the groove 511a of the groove forming portion 511 inserted into the insertion hole 621. .. On the other hand, as shown in FIG. 9, the electrode support rail 62 is formed with a plurality of screw holes 622 penetrating the lower surface thereof and the inner surface of the insertion hole 621, and the plurality of screw holes 622 are formed in the electrode support rail 62. It is provided at approximately equal intervals along the longitudinal direction of the. Each screw hole 622 is provided with an electrode fixing screw S1 for sandwiching and fixing the support portion 51 between the electrode fixing rail 64 and the electrode support rail 62.

Similarly, as shown in FIGS. 4 and 5, the fixing rail 65 has a long electrode fixing rail 68 inserted into the groove 521a of the groove forming portion 521 inserted into the insertion hole 661. On the other hand, as shown in FIG. 9, the electrode support rail 66 is formed with a plurality of screw holes 662 penetrating the lower surface thereof and the inner surface of the insertion hole 661, and the plurality of screw holes 662 are formed in the electrode support rail 66. It is provided at equal intervals along the longitudinal direction of the. Each screw hole 662 is provided with an electrode fixing screw S2 for sandwiching and fixing the support portion 52 between the electrode fixing rail 68 and the electrode support rail 66.

When the electrode fixing screws S1 and S2 are tightened, the amount of protrusion of the electrode fixing screws S1 and S2 into the insertion holes 621 and 661 increases, and the electrode fixing screws S1 and S2 push the electrode fixing screws S1 and S2 to the electrode fixing rails 64 and 68. Moves upwards. Then, as shown in FIG. 9, the support portions 51 and 52 are sandwiched between the upper surfaces 641 and 681 of the electrode fixing rails 64 and 68 and the ceiling surfaces 621b and 661b of the insertion holes 621 and 661, and are generated between them. The electrode 5 is fixed to the electrode support rails 62 and 66 by frictional force. Further, the electrode support rail 62 and the electrode 5 come into contact with each other, and these are electrically connected.

On the contrary, when the electrode fixing screws S1 and S2 are loosened, the amount of protrusion of the electrode fixing screws S1 and S2 into the insertion holes 621 and 661 decreases, and the electrode fixing rails 64 and 68 move downward accordingly. .. Then, as shown in FIG. 10, the support portions 51 and 52 are released from between the upper surfaces 641 and 681 of the electrode fixing rails 64 and 68 and the ceiling surfaces 621b and 661b of the insertion holes 621 and 661, and the electrode support rails 62, The fixation of the electrode 5 to 66 is released. In this state, the electrode 5 can slide with respect to the electrode support rails 62 and 66. With such a configuration, for example, it becomes easy to remove and clean the dirty electrode 5 or to remove and replace the broken electrode 5.

Returning to FIG. 3, when the doors 21 and 22 are opened, airflow (particularly ascending airflow) is suppressed from the outside of the container between the electrode 5 and the ceiling surface 201 into the ceiling surface 201 of the container body 2. A windbreak member 8 is provided. The windbreak member 8 has electrical insulation properties, and its main component is, for example, various resin materials such as polyvinyl chloride (PVC), various ceramic materials such as alumina and titania, and quartz used for insulators. Ceramic materials, various glass materials, etc. can be used.

The windbreak member 8 is provided between the electrodes 5x, 5y, and 5z located closest to the doors 21 and 22, and the doors 21 and 22. Further, the windbreak member 8 has a plate shape extending along the width direction of the accommodation chamber 20 and projects downward from the ceiling surface 201. As shown in FIGS. 11 and 12, the windbreak member 8 is at least one of the openings Q formed between the electrode 5 and the ceiling surface 201 in a plan view of the inside of the accommodation chamber 20 from the doors 21 and 22 sides. It is provided by closing the part. In particular, in the present embodiment, since the lower end of the windbreak member 8 is located below the electrode 5, the windbreak member 8 closes the entire area of the opening Q.

Such a windbreak member 8 suppresses the inflow of airflow from the opening Q to the electrode 5 and the ceiling surface 201. For example, dust, dust, dust, etc. adhere to the ceiling surface 201 and the electrode 5, and the portion is affected. It can effectively prevent contamination. However, the configuration of the windbreak member 8 is not particularly limited as long as it can exhibit its function. Further, the windbreak member 8 may be omitted.

Further, as shown in FIG. 11, the windbreak member 8 is provided with an ozonizer 81 (ozone generator). As a result, ozone (O ₃ ) can be supplied into _{the storage chamber 20, so that the gas generated from the object can be decomposed by ozone (O 3} ), and the object housed in the storage 20 can be decomposed. The freshness of X can be maintained more effectively. However, the ozonizer 81 may be omitted.

Next, the arrangement of the plurality of electrodes 5 will be described. As described above, a total of 24 electrodes 5 are provided, three along the width direction of the container body 2 and eight along the longitudinal direction of the container body 2. As shown in FIG. 3, in the following, for convenience of explanation, eight of these plurality of electrodes 5 are provided unevenly on one end side in the width direction of the container body 2 and arranged along the longitudinal direction of the container body 2. The electrodes 5 are also referred to as "electrodes 5x", and eight electrodes 5 which are provided unevenly on the other end side of the container body 2 in the width direction and arranged along the longitudinal direction of the container body 2 are also referred to as "electrodes 5y" and are containers. Eight electrodes 5 provided at the center of the main body 2 in the width direction, that is, between the electrodes 5x and the electrodes 5y and arranged along the longitudinal direction of the container main body 2, are also referred to as “electrodes 5z”.

In the eight electrodes 5x arranged along the longitudinal direction of the container body 2, a pair of adjacent electrodes 5x and 5x are provided apart from each other, and a gap G is formed between them. By providing the gap G between the pair of adjacent electrodes 5x and 5x in this way, physical contact between the adjacent electrodes 5x and 5x can be prevented, and these can be electrically insulated. Similarly, in the eight electrodes 5y arranged along the longitudinal direction of the container body 2, a pair of adjacent electrodes 5y and 5y are provided apart from each other, and a gap G is formed between them. Further, in the eight electrodes 5z arranged along the longitudinal direction of the container body 2, a pair of adjacent electrodes 5z and 5z are provided apart from each other, and a gap G is formed between them.

Further, each electrode 5x is connected in series via an electrical connection member 9 that electrically connects a pair of adjacent electrode support rails 62, 62. Similarly, the electrodes 5y are connected in series via an electrical connection member 9 that electrically connects the pair of adjacent electrode support rails 62, 62, and each electrode 5z is connected to the pair of adjacent electrode support rails 62. They are connected in series via an electrical connection member 9 that electrically connects 62 and 62. The three electrodes 5x, 5y, and 5z are electrically connected to the voltage applying device 7, respectively. The electrical connection member 9 is not particularly limited, and for example, electrical wiring can be used.

The voltage application device 7 includes, for example, a high-voltage transformer, and applies an alternating voltage Vac for forming an electric field to each electrode 5 (5x, 5y, 5z). When the voltage applying device 7 applies an alternating voltage Vac to each electrode 5, an electric field is formed in the accommodation chamber 20 based on the potential difference between each electrode 5x, 5y, 5z and the container body 2 connected to the ground. Will be done. By applying this electric field to the object housed in the storage chamber 20, aging can be promoted while maintaining the freshness of the object X. Therefore, the edible object can be stored for a longer period of time as compared with the case where the electric field is not formed, and the taste of the object can be amplified. In particular, in the present embodiment, since the plurality of electrodes 5x, 5y, and 5z are regularly provided over almost the entire area of the ceiling surface 201, an electric field can be effectively formed over the entire area of the accommodation chamber 20.

The amplitude of the alternating voltage Vac is not particularly limited, but is preferably about 0.1 kV to 20 kV, for example. By applying an alternating voltage Vac having such an amplitude to each electrode 5x, 5y, 5z, an electric field having sufficient strength can be formed in the accommodation chamber 20, and the above-mentioned effect can be more reliably exhibited. it can. The frequency of the alternating voltage Vac is not particularly limited, but is preferably about 5 Hz to 50 kHz, for example. The waveform of the alternating voltage Vac may be any waveform such as a sine wave, a square wave, or a sawtooth wave.

Here, according to the configuration of the electrode 5 described above, the base portion 531 of the protruding portion 53 is located on the lower side with respect to the support portions 51 and 52, and D1> D2. Therefore, for example, the chain line in FIG. A highly insulating air layer is formed between the base portion 531 and the ceiling surface 201 with a sufficient thickness as compared with the conventional flat plate electrode 50A that matches the heights of the support portions 51 and 52 as shown by L1. be able to. Therefore, the capacity between the base portion 531 and the ceiling surface 201 is larger than that in the conventional case. As a result, it becomes difficult to form an electric field distributed between the base portion 531 and the ceiling surface 201, and it becomes easy to form an electric field distributed in the accommodation space 200 of the object X between the base portion 531 and the floor surface 202. .. Therefore, the electric field can be efficiently and effectively applied to the object housed in the storage chamber 20. Further, since D1> D2, the volume of the accommodation space 200 is larger than that of the conventional flat plate electrode 50B adjusted to the height of the base portion 531 as shown by the chain line L2 in FIG. 13, for example. The maximum load capacity of the object increases accordingly. Therefore, more objects can be transported in one container 1, and the transport cost can be suppressed.

The separation distance D1 is not particularly limited, but is preferably, for example, about 3 cm to 10 cm, and more preferably 4 cm to 8 cm. According to such a lower limit value, the separation distance D1 can be sufficiently increased, and the above-mentioned effect can be exhibited more remarkably. On the contrary, according to such an upper limit value, it is possible to suppress a decrease in the accommodation space 200 due to an excessively large separation distance D1, that is, a decrease in the maximum load capacity of the object X. On the other hand, the separation distance D2 is not particularly limited as long as the relationship of D1> D2 is satisfied, but is preferably about 1 cm to 5 cm, more preferably 2 cm to 3 cm, for example. According to such a numerical range, the separation distance D2 can be sufficiently reduced, and the above-mentioned effect can be exhibited more remarkably.

In particular, as described above, since the base portion 531 has a flat plate shape and is provided over a wide range of the protruding portion 53, the occupancy rate of the portion having the separation distance D1 with respect to the entire electrode 5 becomes larger. Therefore, the above-mentioned effect can be exerted more remarkably.

Further, as described above, the base portion 531 of the electrode 5 is provided with a recessed portion 531a that is recessed upward. By providing such a recessed portion 531a, the mechanical strength of the electrode 5 is improved. Therefore, damage to the electrode 5 due to an impact or the like during transportation can be effectively suppressed. Further, by providing the recessed portion 531a, it is possible to suppress the retention of water adhering to the upper surface of the base portion 531. Further, by providing the recessed portion 531a, unevenness is formed on the lower surface of the base portion 531, and the unevenness makes it possible to more efficiently form an electric field in the accommodation space 200.

Further, as described above, a gap G is formed between the pair of electrodes 5, 5 adjacent to each other in the longitudinal direction of the container body 2. By forming the gap G, the state of the electric field (direction of the electric line of force) can be changed in the portion, and the electric field can be formed more efficiently in the accommodation space 200.

<Second Embodiment>
As shown in FIG. 14, in the container 1 of the present embodiment, the groove forming portion 511 is omitted from the support portion 51 of each electrode 5, and the entire portion is composed of a flat plate-shaped flat portion 512 substantially parallel to the ceiling surface 201. ing. Similarly, the groove forming portion 521 is omitted from the supporting portion 52 of each electrode 5, and the entire portion is composed of a flat plate-shaped flat portion 522 substantially parallel to the ceiling surface 201. The shapes of the insertion holes 621 and 661 formed in the electrode support rails 62 and 66 have also been changed accordingly, and the entire area has a flat shape substantially equal to the width W of the openings 621a and 661a. There is.

Further, in the present embodiment, the electrode fixing rails 64 and 68 are omitted from the fixed rails 61 and 65. Therefore, when the electrode fixing screws S1 and S2 are tightened, the support portions 51 and 52 are sandwiched between the electrode fixing screws S1 and S2 and the electrode support rails 62 and 67, and the electrode 5 is generated by the frictional force generated between them. Is fixed to the electrode support rails 62 and 66. On the contrary, when the electrode fixing screws S1 and S2 are loosened, the support portions 51 and 52 are released from between the electrode fixing screws S1 and S2 and the electrode fixing rails 64 and 68, and the electrodes 5 with respect to the electrode support rails 62 and 66 are released. Is released.

Further, as shown in FIGS. 14 and 15, at both ends of the electrode support rail 62, insertion holes 621 open to the outer surface 620 of the electrode support rail 62, and the electrode support rails 62 and 62 adjacent to each other are opened in the portions. An electrode connecting member 10 is provided so as to straddle the electrodes and electrically connect the electrode support rails 62 and 62. The electrode connecting member 10 is bent in a substantially L shape, is inserted into the insertion hole 621, and is electrically connected to the electrode 5 by contacting the support portion 51, and the electrode support rail 62. It has a portion 102 that is located on the outer surface 620 of the surface and is electrically connected to the electrode support rail 62 by contacting the electrode support rail 62. Such an electrode connecting member 10 is fixed to the electrode support rail 62 by a fixing screw S31 in the portion 102.

Similarly, at both ends of the electrode support rail 66, insertion holes 661 open to the outer surface 660 of the electrode support rail 66, and are arranged in the portion so as to straddle the adjacent electrode support rails 66, 66, and support these electrodes. An electrode connecting member 11 for electrically connecting the rails 66 and 66 is provided. The electrode connecting member 11 is bent in a substantially L shape, is inserted into the insertion hole 661, and is electrically connected to the electrode 5 by contacting the support portion 52, and the electrode support rail 66. It has a portion 112 that is located on the outer surface 660 of the and is electrically connected to the electrode support rail 66 by contacting the electrode support rail 66. Such an electrode connecting member 11 is fixed to the electrode support rail 66 by a fixing screw S32 in the portion 112.

As the electrode connecting members 10 and 11, various metal materials such as aluminum and stainless steel can be used.

<Third Embodiment>
In the third embodiment, the voltage applying device 7 changes the state of the electric field formed in the accommodating chamber 20 with time. By changing the state of the electric field in the containment chamber 20 over time, for example, the growth (division) of microorganisms contained in the food can be increased as compared with the case where the state of the electric field in the containment chamber 20 is kept constant. It can be suppressed. Therefore, the freshness of the object accommodated in the accommodation chamber 20 can be maintained for a longer period of time.

The growth of microorganisms is suppressed by changing the state of the electric field in the accommodation chamber 20 over time because the microorganisms have the property of starting division after becoming accustomed to the environment to some extent. By changing the state of the electric field over time, the microorganisms can switch to a different environment before they become accustomed to the current environment, which can prevent the microorganisms from becoming accustomed to the environment, resulting in the growth of the microorganisms. It can be suppressed. Examples of microorganisms contained in the object include salmonella, enterohemorrhagic Escherichia coli (O157, O111, etc.), Vibrio parahaemolyticus, Clostridium perfringens, Staphylococcus aureus, Clostridium botulinum, Bacillus cereus, and norovirus, which are considered to be the causes of food poisoning. And so on.

Here, "changing the state of the electric field with time" means, for example, changing at least one of the amplitude and frequency of the alternating voltage Aac applied to each electrode 5 with time. The method of changing the state of the electric field over time is not particularly limited, and examples thereof include several methods shown below.

As a first method, as shown in FIG. 16, a method in which an alternating voltage Vac having a reference of 0 V and a constant amplitude and frequency is intermittently applied to each electrode 5 can be mentioned. In FIG. 16, the voltage applying device 7 alternately repeats the first state in which the alternating voltage Vac is applied to each electrode 5 and the second state in which the alternating voltage Vac is not applied to each electrode 5. That is, the first state in which the electric field is formed in the accommodation chamber 20 and the second state in which the electric field is not formed are alternately repeated. In this way, by alternately repeating the first state and the second state, the state of the electric field can be changed over time with relatively simple control.

As a second method, as shown in FIG. 17, a method of changing the amplitude of the alternating voltage Vac applied to each electrode 5 over time can be mentioned. Note that changing the amplitude of the alternating voltage Vac with time means that the amplitude of the alternating voltage Vac may be changed periodically or irregularly (randomly). In FIG. 17, the voltage application device 7 has a first state in which an alternating voltage Vac having a reference of 0V and an amplitude of E1 is applied to each electrode 5, and an alternating voltage Vac having a reference of 0V and an amplitude of E2 (≠ E1). Is alternately repeated with the second state in which is applied to each electrode 5. By alternately repeating the first state and the second state, the state of the electric field can be changed over time with relatively simple control.

The amplitude E1 is preferably twice or more, more preferably three times or more, and even more preferably four times or more the amplitude E2. As a result, the state of the electric field in the accommodation chamber 20 can be sufficiently different between the first state and the second state, and it is possible to effectively suppress the microorganisms from becoming accustomed to the environment.

As a third method, as shown in FIG. 18, a method of changing the frequency of the alternating voltage Vac applied to each electrode 5 over time can be mentioned. Note that changing the frequency of the alternating voltage Vac over time means that the frequency of the alternating voltage Vac may be changed periodically or irregularly (randomly). In FIG. 18, the voltage applying device 7 has a first state in which an alternating voltage Vac having a frequency of f1 is applied to each electrode 5, and a second state in which an alternating voltage Vac having a frequency f2 (≠ f1) is applied to each electrode 5. And repeat alternately. By alternately repeating the first state and the second state, the state of the electric field can be changed over time with relatively simple control.

The frequency f1 is preferably 10 times or more, more preferably 50 times or more, and further preferably 100 times or more the frequency f2. As a result, the state of the electric field in the accommodation chamber 20 can be sufficiently different between the first state and the second state, and it is possible to effectively suppress the microorganisms from becoming accustomed to the environment.

As a fourth method, as shown in FIG. 19, a bias voltage Vb, which is a constant voltage, is intermittently applied to each electrode 5 while applying an alternating voltage Vac whose reference is 0 V and whose amplitude and frequency are constant. A method of applying can be mentioned. In FIG. 19, the voltage applying device 7 alternates between a first state in which the superimposed voltage Vd of the alternating voltage Vac and the bias voltage Vb is applied to each electrode 5 and a second state in which the alternating voltage Vac is applied to each electrode 5. Repeat to. By alternately switching between the first state and the second state, the state of the electric field can be changed over time with relatively simple control. In particular, in this method, since the alternating voltage Vac can be kept constant, the control becomes simpler than the second and third methods of changing the amplitude and frequency of the alternating voltage Vac.

The bias voltage Vb is smaller than the amplitude (maximum value) of the alternating voltage Vac. As a result, the superimposed voltage Vd can be used as an AC voltage. Therefore, in the first state, an electric field can be more reliably formed in the accommodation chamber 20. The bias voltage Vb is preferably 0.1 to 0.6 times, more preferably 0.2 times to 0.5 times, and 0.3 times to 0 times the amplitude of the alternating voltage Vac. It is more preferable to be 4.4 times. This makes it possible to balance the time when the superimposed voltage Vd is on the positive side and the time when it is on the negative side, that is, it is possible to prevent one from becoming excessively longer than the other, and it is more efficient in the first state. An electric field can be formed in the accommodation chamber 20. In addition, the state of the electric field in the accommodation chamber 20 can be sufficiently different between the first state and the second state, and it is possible to effectively suppress the microorganisms from becoming accustomed to the environment.

The first to fourth methods have been described above as methods for changing the state of the electric field over time. In any of the first to fourth methods, the state of the electric field is set to 1 though it differs depending on the temperature in the accommodation chamber 20 and the type of the object (the type of microorganism contained in the food) contained in the accommodation chamber 20. It is preferable to change the temperature at intervals of 1 minute or more and 60 minutes or less, preferably at intervals of 2 minutes or more and 40 minutes or less, and preferably at intervals of 3 minutes or more and 30 minutes or less. In other words, the time of the first state and the second state is preferably 1 minute or more and 60 minutes or less, more preferably 2 minutes or more and 40 minutes or less, and 3 minutes or more and 30 minutes or less, respectively. Is even more preferable. This makes the time of the first state and the time of the second state sufficiently short, respectively, and more reliably allows the microorganism to switch to another environment before it becomes accustomed to the current environment. In addition, it is possible to prevent the time of the first state and the time of the second state from becoming excessively short, respectively, and effectively prevent the microorganisms from returning to the original environment before starting to respond to the new environment. be able to. That is, the state of the electric field can be changed at a time interval slightly shorter than the division rate of the microorganism. Thereby, the division of microorganisms can be suppressed more effectively. The time in the first state and the time in the second state may be the same or different.

Here, the microorganism has (1) a division rate of about 10 to 40 minutes in a temperature range of about 10 ° C. to 40 ° C., (2) the lower the temperature, the lower the division rate, (3). It is known that (4) almost all microorganisms cannot grow at 0 ° C or lower, except for some microorganisms. Therefore, as described above, by changing the state of the electric field within 60 minutes, preferably within 40 minutes, more preferably within 30 minutes, the time until the microorganisms become accustomed to the environment (for example, about 10 minutes) can be increased. In addition, the state of the electric field can be changed at intervals sufficiently shorter than the division rate of microorganisms. Therefore, the growth of microorganisms can be suppressed more reliably.

Further, in any of the first to fourth methods, the electric field may be changed periodically or irregularly (randomly). In other words, the time of the first state and the time of the second state may be substantially the same each time, or the time of the first state and the time of the second state may change irregularly each time. By changing the electric field periodically, the drive control of the voltage applying device 7 becomes simpler than in the case where the electric field is changed irregularly. On the other hand, by changing the electric field irregularly, there is a possibility that the growth of microorganisms can be suppressed more effectively than in the case where the electric field is changed periodically. It is speculated that if the electric field is changed periodically, the microorganisms may become accustomed to the periodic environmental changes themselves. In this way, even if the microorganisms may become accustomed to the periodic environmental changes themselves, if the electric field is changed irregularly, the growth of the microorganisms can be suppressed more effectively.

As a method of changing the state of the electric field with time, the above-mentioned first to fourth methods may be appropriately combined. Further, in each of the first to fourth methods described above, the first state and the second state are alternately repeated, but the present invention is not limited to this, and for example, the first state and the second state and the electric field state are used. May have at least one different state (third state, fourth state, fifth state, etc.), and these plurality of states may be repeated in order.

<Fourth Embodiment>
In the present embodiment, in the present embodiment, each electrode 5x, each electrode 5y, and each electrode 5z are independently connected to the voltage application device 7. By providing the three electric field forming systems in this way, even if one electric field forming system fails, an electric field can be formed by the other two electric field forming systems. As a result, the risk of not being able to form an electric field due to a failure is reduced, and high reliability can be exhibited.

Further, the voltage applying device 7 can also apply different voltages to each electrode 5x, each electrode 5y and each electrode 5z. That is, the container 1 has electrodes 5x, 5y, and 5z as a plurality of electrodes, and different voltages are applied to these electrodes 5x, 5y, and 5z. In this way, by applying different voltages to the electrodes 5x, 5y, and 5z, the electric field can be changed periodically or irregularly as in the second embodiment described above.

The voltage applied to each electrode 5x, 5y, 5z is not particularly limited. For example, a first alternating voltage Vac1 which is a voltage applied to each electrode 5x, a second alternating voltage Vac2 which is a voltage applied to each electrode 5y, and a third alternating voltage Vac3 which is a voltage applied to each electrode 5z. The frequencies may be different from each other. Further, for example, the frequency and amplitude may be different between the first alternating voltage Vac1, the second alternating voltage Vac2, and the third alternating voltage Vac3. Further, for example, the same waveform may be used for the first alternating voltage Vac1, the second alternating voltage Vac2, and the third alternating voltage Vac3, and their phases may be shifted from each other.

In this embodiment, electrodes 5x, 5y, and 5z are provided as a plurality of electrodes to which different voltages are applied, but at least two electrodes 5 are provided, and different voltages are applied to these electrodes. If so, it is not limited to this. For example, any one of the electrodes 5x, 5y, and 5z may be omitted, or conversely, at least one electrode to which a voltage can be applied independently may be added.

Further, in the present embodiment, one electrode group is formed by each electrode 5x, another electrode group is formed by each electrode 5y, and another electrode group is formed by each electrode 5z. The configuration is not limited to this. For example, each electrode group may have at least one electrode 5x, 5y, 5z. Further, each electrode group may have different numbers of electrodes 5 constituting them. As described above, in the container 1, the electrodes 5 are provided on the ceiling surface 201 in a state of being insulated from each other, and the desired electrodes 5 are electrically connected to each other by using the electrical connection member 9. It has become. Therefore, the configuration of each electrode group can be easily changed to the desired configuration simply by reconnecting the electrical connection members 9.

<Fifth Embodiment>
As shown in FIG. 20, in the present embodiment, the electrode 5z is removed from the fixed rail pair 60, and the container 1 is composed of a first electrode group 5A composed of eight electrodes 5x and eight electrodes 5y. It has a second electrode group 5B and the like. Then, as shown in FIG. 21, the voltage applying device 7 applies the first alternating voltage Vac1 to the first electrode group 5A, and applies the second alternating voltage Vac2 to the second electrode group 5B in the opposite phase to the first alternating voltage Vac1. Is applied. The first alternating voltage Vac1 and the second alternating voltage Vac2 have the same waveform, and have the same frequency and amplitude.

By shifting the first alternating voltage Vac1 and the second alternating voltage Vac2 in opposite phases, that is, by 180 °, the potential difference ΔV1 between the first electrode group 5A and the second electrode group 5B is increased between the first electrode group 5A and the container body 2. The potential difference between the two and the second electrode group 5B is larger than the potential difference ΔV3 between the second electrode group 5B and the container body 2. That is, the relationship is ΔV1> ΔV2 and ΔV1> ΔV3. Therefore, between the first electrode group 5A and the inner wall of the container body 2, or between the first electrode group 5A and the second electrode group 5B, rather than between the second electrode group 5B and the inner wall of the container body 2. An electric field is easily formed.

Therefore, the electric field can be formed over a wider area, preferably the entire area of the accommodation chamber 20, and the electric field can be efficiently applied to an object placed at any position in the accommodation chamber 20. The "opposite phase" refers to the case where the phase difference between the first alternating voltage Vac1 and the second alternating voltage Vac2 coincides with 180 °, and a slight error (for example, ± 10%) that may occur in technology. It is a meaning including the case of having.

The storage of the present invention has been described above based on the illustrated embodiment, but the present invention is not limited thereto. For example, the configuration of each part can be replaced with an arbitrary configuration that exhibits the same function, or an arbitrary configuration can be added.

1 Container 2 Container body 20 Storage room 200 Storage space 201 Ceiling surface 202 Floor surface 21 Door 22 Door 24 Groove 3 Cooling device 31 Suction part 32 Cooling device 33 Blow-out part 34 Temperature sensor 4 Electrode forming device 5 Electrode 5A First electrode group 5B 2nd electrode group 5x electrode 5y electrode 5z electrode 50A flat plate electrode 50B flat plate electrode 51 support part 511 groove forming part 511a groove 512 flat part 52 supporting part 521 groove forming part 521a groove 522 flat part 53 protruding part 531 base part 531a recessed part 532 Connection part 533 Connection part 59 Insulation film 6 Fixture 60 Fixed rail vs. 61 Fixed rail 62 Electrode support rail 621 Insertion hole 621a Opening 621b Ceiling surface 622 Screw hole 63 Insulation block 64 Electrode fixing rail 641 Top 65 Fixed rail 66 Electrode support rail 661 Insertion hole 661a Opening 661b Ceiling surface 662 Screw hole 67 Insulation block 68 Electrode fixing rail 681 Upper surface 7 Voltage application device 8 Windproof member 9 Electrical connection member 10 Electrical connection member 101 Part 102 Part 11 Electrical connection member 111 Part 112 Part D1 Separation distance D2 Separation distance E1 Axis E2 Axis G Gap H Height L1 Chain wire L2 Chain wire Q Opening S1 Electrode fixing screw S2 Electrode fixing screw S31 Fixing screw S32 Fixing screw Vac Alternate voltage Vac1 First alternation voltage Vac2 Second alternation voltage Vb Bias Voltage Vd Superposed voltage f1 Frequency f2 Frequency θ Tilt angle

Claims (8)

The main body of the vault, which has a containment chamber for accommodating the object,
It is provided in the containment chamber and has an electrode for forming an electric field in the containment chamber.
The electrodes include a support portion supported on the inner wall of the storage chamber and a support portion.
It has a protrusion protruding from the support portion toward the accommodation chamber, and has a protrusion.
A storage chamber characterized in that the separation distance between the protruding portion and the inner wall is larger than the separation distance between the support portion and the inner wall. The storage according to claim 1, wherein the electrode is provided on the ceiling surface of the storage chamber. The storage according to claim 2, wherein the protruding portion has a flat plate-shaped base provided along the ceiling surface. The storage according to claim 3, wherein the base portion has a recessed portion that is recessed on the ceiling surface side. The storage according to any one of claims 1 to 4, which has an insulator interposed between the electrode and the storage main body and insulating the electrode and the storage main body. A support member fixed to the storage body via the insulator and having an insertion hole into which the support portion can be inserted.
The accommodation according to claim 5, further comprising a fixing member that is inserted into the insertion hole together with the support portion and that fixes the support portion to the support member by sandwiching the support portion with the support member. Warehouse. The storage according to any one of claims 1 to 6, wherein the state of the electric field changes with time. It has a plurality of the above electrodes and has a plurality of the above electrodes.
The storage according to any one of claims 1 to 7, wherein different voltages are applied to the plurality of electrodes.

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