JP2023132518A - Pallet and container - Google Patents

Abstract

To form a stable electromagnetic field in a container (an internal space of the container) to maintain freshness of objects to be cooled (stored) for a long time and reduce installation costs of a field generation device.SOLUTION: A pallet 21 is disposed at an indoor space in which a refrigeration machine 8 is installed and includes: multiple first conductor plates 211 laid on one surface of the pallet 21; and a generator 10 for applying a voltage to the first conductor plates 211 to form electromagnetic fields in a space formed by the first conductor plates 211, a second conductor plate 22 forming a ceiling surface 6 facing the one surface at the indoor space, and insulation plates 23 forming surfaces 7 facing the interior of the indoor space and excluding the one surface and the ceiling surface 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to pallets and containers.

As a preservation method that maintains the freshness of objects to be cooled (objects to be preserved) such as foods and living organisms for a long period of time, there is a known method of creating an electric field (electrostatic field atmosphere) in the space inside the refrigerator, in addition to refrigerated storage or frozen storage. ing. In this method, the objects to be cooled are refrigerated while creating an electric field through voltage oscillations by applying a high voltage inside the refrigerator, thereby making the objects difficult to freeze even near the freezing point. This enables long-term storage near the freezing point (see, for example, Patent Documents 1 to 3).

Utility model registration No. 3218537 Japanese Patent Application Publication No. 2011-182697 JP2022-013221A

The preservation method described above applies a high voltage to create an electric field, which causes water molecules in the object to vibrate slightly, making it difficult for them to bond with each other, thereby making the object less likely to freeze. . Therefore, in this preservation method, it is important to stably form the electric field inside the refrigerator. In addition, if the object to be cooled is moved between multiple refrigerated containers or freezer rooms, etc. and the storage location is changed, all the refrigerated containers or freezers in which the object may be stored must be An electric field generating device must be attached to the freezer compartment etc. to stably form an electric field inside the refrigerator.

The pallets and containers in this case were devised in view of these issues, and they create a stable electromagnetic field inside the warehouse, maintain the freshness of objects to be cooled (objects to be stored) for a long period of time, and generate electric fields. The purpose is to reduce equipment installation costs. In addition, other purposes of the present invention are not limited to this purpose, but also to achieve functions and effects that are derived from each configuration shown in the detailed description of the invention and that cannot be obtained by conventional techniques. be.

(1) The pallet disclosed herein is a pallet placed in a room equipped with a refrigerator, and includes a plurality of first conductor plates laid on one surface of the pallet, and a plurality of first conductor plates laid on one surface of the pallet. A voltage is applied to the plates to connect the first conductive plate, a second conductive plate forming a ceiling surface facing the first surface in the room, and a surface facing the interior of the room to the first surface and and a generator for generating an electromagnetic field in a space constituted by an insulating plate constituting a surface other than the ceiling surface.

(2) Preferably, the pallet further includes a non-conductor plate laid on the one surface so as to cover the plurality of first conductor plates.

(3) It is preferable that the plurality of first conductor plates are laid on the one surface with gaps between them, and that the generator controls voltage application to each of the first conductor plates.

(4) Another pallet including at least the plurality of first conductor plates is arranged in the room, and the generator generates a voltage for the plurality of first conductor plates laid on the pallet and the other pallet, respectively. Preferably, the application is controlled.

(5) The container disclosed herein is a container equipped with a refrigerator and in which a pallet is arranged, and includes a plurality of first conductive plates laid on one surface of the pallet, and a plurality of first conductive plates laid on one surface of the pallet, and a plurality of first conductive plates facing the one surface. A voltage is applied to a second conductor plate forming a ceiling surface, an insulating plate forming a surface facing the inside of the container excluding the first surface and the ceiling surface, and the first conductor plate. A generator for forming an electromagnetic field in the interior space of the container.

According to the disclosed container, it is possible to form a stable electromagnetic field inside the warehouse (inner space of the container), so that the freshness of objects to be cooled (objects to be stored) can be maintained for a long period of time, and it is also possible to install an electric field generating device. Cost can be reduced.

It is a perspective view showing a container concerning an embodiment. FIG. 2 is a view of the container shown in FIG. 1 with the opening/closing door open, as seen from the outside of the container. FIG. 3 is a diagram (corresponding to FIG. 2) for explaining the action of the container in FIG. 1; FIG. 2 is a plan cross-sectional view for explaining the arrangement of pallets 21 in the container of FIG. 1. FIG. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 2 is a measurement result of electric field distribution inside the container of FIG. 1. 5A to 5I are diagrams for explaining the measurement locations of the electric field distribution shown in FIGS. 5A to 5I. FIG. This is a unit conversion table for electric field.

A pallet 21 and a container 1 as an embodiment will be described with reference to the drawings. The embodiments shown below are merely illustrative, and there is no intention to exclude the application of various modifications and techniques not specified in the embodiments below. The configuration of this embodiment can be modified and implemented in various ways without departing from the spirit thereof. Further, they can be selected or combined as necessary.

[1. composition]
FIG. 1 is a perspective view showing a container 1 of this embodiment. The container 1 is a storage for accommodating and refrigerating objects to be cooled (hereinafter referred to as "objects to be preserved") such as food and living organisms, and is used, for example, for cargo transportation. A well-known refrigerator 8 is attached to the container 1. The container 1 of this embodiment has a rectangular parallelepiped shape, with a refrigerator 8 disposed at one end in the longitudinal direction (upper left in FIG. 1), and an opening/closing door at the other end in the longitudinal direction (lower right in FIG. 1). 5 is placed. That is, the container 1 of this embodiment has an opening only on the other end side, and this opening is closed by the opening/closing door 5.

The refrigerator 8 is arranged in a housing section 9 provided at one end of the container 1. The accommodating portion 9 is a portion that is recessed from one end side of the container 1 toward the inner space side of the container 1 .

A plurality of pallets 21 are arranged on the bottom surface 2 of the container 1. In the example shown in FIG. 1, twelve pallets 21 (six in the longitudinal direction x two in the width direction) are arranged on the bottom surface 2 of the container 1. The length of the pallet 21 in the longitudinal direction and width direction in FIG. 1 may be, for example, 1000 mm x 1000 mm (or 1100 mm x 1100 mm). That is, in FIG. 1, the size of the bottom surface 2 of the container 1 is 6000 mm in the longitudinal direction because six pallets 21 in the longitudinal direction of the bottom surface x two pallets in the width direction are arranged over one surface of the bottom surface 2 of the container 1. (or 6600 mm), and the width direction is 2000 mm (or 2200 mm).

In the internal space formed between the top and bottom surfaces of the pallet 21, a part of the generator 10 for generating an electromagnetic field and a down transformer 14 are arranged.

The generator 10 includes a control box 11 containing a transformer that generates high voltage and a control means, a relay device 12 that controls voltage application to a first conductor plate 211 (described later), and a high voltage cable 13. The high voltage cable 13 has a portion connecting the control box 11 and the relay device 12, a portion connecting the relay device 12 and the first conductor plate 211, and a portion connecting the pallet 21 and other pallets 21. Each is provided.

The down transformer 14 drops the voltage of the refrigerator 8 or an external power source to supply power to the control box 11 of the generator 10 . A terminal provided at the tip of the power cable of the refrigerator 8 and a terminal provided at the tip of the power cable of the control box 11 are connected to the terminal block of the down transformer 14, respectively. Note that the method of connecting these devices (down transformer 14, control box 11, relay device 12, etc.) is one example.

The generator 10 and the down transformer 14 may be provided in at least one pallet 21 among the plurality of pallets 21 arranged inside the container 1. The pallet 21 (in other words, the main pallet 21) equipped with the generator 10 and the down transformer 14 is connected to the other pallet 21 by the high voltage cable 13, so that the pallet 21 is connected to the first conductor plate 211 of the other pallet 21. Apply voltage. Note that the main pallet 21 and each other pallet 21 do not need to be directly connected by the high voltage cable 13. For example, the main pallet 21 is connected to a first other pallet 21, the first other pallet 21 is connected to a second other pallet 21, and the second other pallet 21 is connected to a third other pallet. The pallets 21 may be connected in a daisy chain manner by the high-voltage cables 13, such that the pallets 21 are connected to the pallets 21 of the same.

A plurality of (three in the example shown in FIG. 1) first conductor plates 211 are laid on the surface of each pallet 21. In the example shown in FIG. 1, three first conductor plates 211 are laid parallel to the width direction of the container 1, but the first conductor plates 211 may be laid parallel to the longitudinal direction of the container 1. Furthermore, a non-conductor plate 212 is laid on the plurality of first conductor plates 211 so as to cover the entirety thereof. As the nonconductor plate 212, a thin plate made of a material such as resin (FRP, ABS) or foamed polyethylene can be used.

Next, the internal structure of the container 1 will be explained. FIG. 2 is a view of the container 1 shown in FIG. 1 with the opening/closing door 5 open, as viewed from outside the container. As shown in FIG. 2, the container 1 includes a plurality of pallets 21 forming a first conductor plate 211 laid on the bottom surface 2 inside, a second conductor plate 22 forming a ceiling surface 6 facing the bottom surface 2, and a container. an insulating plate 23 constituting a surface facing the inside of the device 1 excluding the bottom surface 2 and the ceiling surface 6. That is, in the container 1, only the upper and lower surfaces (the hatched surfaces in FIG. 2) conduct electricity, and the other surfaces (the dotted surfaces in FIG. 2) do not conduct electricity. As a result, when voltage is applied to one conductor plate (first conductor plate 211), electricity flows easily to the other conductor plate (second conductor plate 22), so a stable electromagnetic field is formed. .

As the first conductor plate 211 and the second conductor plate 22, thin metal plates such as aluminum plates and stainless steel plates can be used, for example. If the ceiling surface 6 of the container 1 is originally formed of a conductor, the ceiling surface 6 can be used as the second conductor plate 22. On the other hand, in the container 1, even if the bottom surface 2 is originally formed of a conductor, as shown in FIGS. They are placed side by side so as to cover each other. Note that an object to be stored is placed on the first conductive plate 211.

As the insulating plate 23, a thin plate made of a material such as resin (FRP, ABS) or foamed polyethylene can be used. The insulating plates 23 are attached to the side surfaces 7 on both sides in the width direction of the container 1, on the surface (inner surface) facing the inside of the opening/closing door 5, and on the side surface 7 on one end side in the longitudinal direction. The method of pasting is not particularly limited, and can be pasted using a commercial adhesive, double-sided tape, or the like. Note that after pasting the insulating plate 23, it is preferable to perform sealing to fill the gap.

FIG. 3 is a diagram (corresponding to FIG. 2) for explaining the operation of the container 1 in FIG. 1. According to the container 1 described above, an electromagnetic field can be generated by applying a voltage to the first conductor plate 211 laid on the bottom surface 2, but the inside surface other than the bottom surface 2 and the ceiling surface 6 is covered with the insulating plate 23. As shown in FIG. 3, the direction in which electricity flows can be determined from the bottom to the top. In other words, in the container 1 described above, a stable electromagnetic field can be formed because the voltage (electricity) applied to the first conductive plate 211 is directed toward the ceiling surface 6 where it easily flows.

FIG. 4 is a plan cross-sectional view for explaining the arrangement of the pallets 21 within the container 1 of FIG. In the example shown in FIG. 4, pallets #1-1 to #1-6 and #2-1 to #2-6 are arranged as pallets 21 in the container 1. Pallets #1-1 to #1-6 belong to electrode group #1, and pallets #2-1 to #2-6 belong to electrode group #2. Electrode group #2 is arranged on the entrance/exit side of container 1 (on the opening/closing door 5 side in FIG. 1), and electrode group #1 is arranged on the side opposite to opening/closing door 5 (on the refrigerator 8 side in FIG. 1).

One of the pallets #1-1 to #1-6 belonging to electrode group #1 functions as the main pallet 21, and one of pallets #2-1 to #2-6 belonging to electrode group #2 functions as the main pallet 21. One of them may function as the main pallet 21. Then, the main pallet 21 of each electrode group applies a voltage to the first conductive plate 211 of the main pallet 21 and the first conductive plate 211 of the other pallets 21 belonging to the same electrode group. The main pallet 21 may sequentially apply voltage to one or more pallets 21 in a relay manner. Note that the electrode group may not be defined, and one main pallet 21 may apply voltage to the first conductor plates 211 of all pallets 21 in the container 1. Furthermore, three or more electrode groups may be defined within the container 1.

In FIG. 4, the direction from left to right when looking from the doorway side of container 1 to the back side is the x-axis direction, the direction from the doorway side of container 1 to the back side is the y-axis direction, and the vertically upward direction is the z-axis direction. Defined. Also, point A1 is between container #1-1 and container #1-2, point A2 is at the center of container #1-3, and point A3 is between container #1-3 and container #1-4. However, point A4 is defined at the center of container #1-4, and point A5 is defined between container #1-5 and container #1-6.

A voltage of 3.5 kV was applied to pallets #1-1 to #1-6. When measuring the electric field strength at the height near the first conductor plate 211 at points A1 to A5, they are 15.841 kV/m, 11.455 kV/m, 10.295 kV/m, 11.893 kV/m, and 15.024 kV/m, respectively. became. When measuring the electric field strength at a height near the middle of the first conductive plate 211 and the second conductive plate 22 at points A1 to A5, the electric field strengths are 0.678 kV/m, 0.8396 kV/m, 0.9667 kV/m, and 0.9432 kV/, respectively. m, 0.7986 kV/m. When measuring the electric field strength at the height near the second conductor plate 22 at points A1 to A5, they are 0.1663 kV/m, 0.321 kV/m, 0.4 kV/m, 0.3142 kV/m, and 0.2093 kV/m, respectively. became. The electric field intensity is small at a height near the second conductive plate 22, and the electric field intensity is approximately symmetrical in the x-axis direction and the y-axis direction.

Next, when an electric field sensor is placed on the vertically stacked cardboard boxes (near the middle between the first conductor plate 211 and the second conductor plate 22) and the electric field strength is measured, it becomes 5.1342 kV/m at point A3. Ta. That is, on the dielectric material such as cardboard, the electric field strength was greater than the electric field strength of 0.9667 kV/m at the same location when no cardboard or the like was placed.

5A to 5I show the measurement results of the electric field distribution inside the container 1 of FIG. 1. FIG. 6 is a diagram for explaining the measurement locations of the electric field distribution shown in FIGS. 5A to 5I. FIG. 7 is a unit conversion table for electric field. As shown in FIG. 6, nine electric field sensors 100 (electric field sensors #1 to #9) are placed on any plane parallel to the surface of the first conductor plate 211. When the unit of electric field [dBkV/m] shown in FIGS. 5A to 5I is converted to the unit of electric field [kV/m], the unit conversion table shown in FIG. 7 is obtained.

FIG. 5A shows electric field distributions measured by electric field sensors #1 to #9 on each plane of Z=0, +20, and +40. FIG. 5B shows an electric field distribution based on electric field intensities measured by electric field sensors #2, #4, #6, and #8 on any plane from Z=0 to +50. FIG. 5C shows the electric field distribution in the cross section of Y=-15 based on the electric field intensities measured by electric field sensors #4 to #9 on any plane of Z=0 to +50. FIG. 5D shows the electric field distribution in the cross section at Y=-10 based on the electric field intensities measured by electric field sensors #4 to #9 on arbitrary planes from Z=0 to +50. FIG. 5D shows the electric field distribution in the cross section at Y=-5 based on the electric field intensities measured by electric field sensors #4 to #9 on arbitrary planes from Z=0 to +50. FIG. 5F shows the electric field distribution in the cross section at Y=-0 based on the electric field intensities measured by electric field sensors #4 to #6 in arbitrary planes from Z=0 to +50. FIG. 5G shows the electric field distribution in the cross section of Y=5 based on the electric field intensities measured by electric field sensors #1 to #6 on arbitrary planes of Z=0 to +50. FIG. 5H shows the electric field distribution in the cross section of Y=10 based on the electric field intensities measured by electric field sensors #1 to #6 on arbitrary planes of Z=0 to +50. FIG. 5I shows the electric field distribution in the cross section of Y=15 based on the electric field intensities measured by electric field sensors #1 to #6 on arbitrary planes of Z=0 to +50.

As shown in FIGS. 5A to 5I, the electric field strength is large near Z=0 and becomes small near Z=50.

[2. effect]

(1) The pallet 21 is installed indoors by applying a voltage to the plurality of first conductor plates 211 laid on one surface of the pallet 21 and the plurality of first conductor plates 211. In the space constituted by the second conductor plate 22 forming the ceiling surface 6 facing the surface of a generator 10 for forming a field. As a result, a stable electromagnetic field can be formed inside the warehouse (inner space of the container 1), so the freshness of the objects to be cooled (objects to be stored) can be maintained for a long period of time, and the installation cost of the generator 10 can be reduced. can do. Specifically, even when the object to be cooled is transported and moved between multiple refrigerated containers or freezer rooms, etc., and the storage location is changed, the generator is placed on the pallet 21 on which the object to be cooled is placed. 10, it is not necessary to prepare a generator 10 for each storage location of objects to be cooled.

(2) The pallet 21 further includes a non-conductor plate 212 laid so as to cover the plurality of first conductor plates 211 on one surface. This can prevent electrical leakage from the first conductor plate 211 to the object to be cooled.

(3) A plurality of first conductor plates 211 are laid on one surface with gaps between them, and the generator 10 controls voltage application to each first conductor plate 211. Thereby, the resistance value of the capacitor constituted by the first conductor plate 211 and the second conductor plate 22 can be reduced, and the power consumption of the generator 10 can be reduced.

(4) Another pallet 21 having at least a plurality of first conductor plates 211 is arranged in the room, and the generator 10 is configured to operate the plurality of first conductor plates laid on each pallet 21 and the other pallet 21 respectively. The voltage application to 211 is controlled. As a result, it is only necessary to provide one generator 10 for a plurality of pallets 21, and the power consumption is only required for one generator 10, so that power consumption can be significantly reduced.

[3. others]
The configuration of the container 1 described above is an example, and is not limited to the configuration described above. For example, the side portion of the container 1 may be curved, or the side portion of the container 1 may be provided with an opening and a door. Further, the container 1 may be a refrigerating room capable of storing the pallet 21.

In the embodiment described above, the generator 10 and the down transformer 14 are arranged on the pallet 21, but the arrangement of these devices is not limited to this. The generator 10 and the down transformer 14 may be placed in the container 1.

1: Container 2: Bottom 5: Door 6: Ceiling 7: Side 8: Refrigerator 9: Housing section 10: Generator 11: Control box 12: Relay device 13: High voltage cable 14: Down transformer 21: Pallet 22: Second conductor plate 23: Insulating plate 100: Electric field sensor 211: First conductor plate 212: Non-conductor plate

Claims (9)

A pallet placed in a room equipped with a refrigerator,
a plurality of first conductor plates laid on one surface of the pallet;
A voltage is applied to the plurality of first conductor plates, and the first conductor plate, the second conductor plate forming a ceiling surface facing the one surface in the room, and the surface facing the interior of the room. a generator for forming an electromagnetic field in a space constituted by the one surface and an insulating plate constituting a surface other than the ceiling surface;
A palette comprising: The pallet according to claim 1, further comprising a non-conductive plate laid on the one surface so as to cover the plurality of first conductive plates. The plurality of first conductor plates are laid on the one surface with gaps between them,
the generator controls voltage application to each of the first conductor plates;
The pallet according to claim 1 or 2, characterized in that: Another pallet including at least the plurality of first conductor plates is arranged in the room,
The generator controls voltage application to the plurality of first conductor plates installed on the pallet and other pallets, respectively.
Pallet according to any one of claims 1 to 3, characterized in that: A container equipped with a refrigerator and in which pallets are placed,
a plurality of first conductor plates laid on one surface of the pallet;
a second conductor plate forming a ceiling surface facing the first surface;
an insulating plate constituting a surface facing the inside of the container excluding the first surface and the ceiling surface;
a generator for applying a voltage to the first conductor plate to form an electromagnetic field in the internal space of the container;
A container comprising: The container according to claim 5, further comprising a non-conductor plate laid on the one surface so as to cover the plurality of first conductor plates. The plurality of first conductor plates are laid on the one surface with gaps between them,
the generator controls voltage application to each of the first conductor plates;
The container according to claim 5 or 6, characterized in that: Another pallet including at least the plurality of first conductor plates is arranged in the container,
The generator controls voltage application to the plurality of first conductor plates laid on each of the pallets and other pallets,
Container according to any one of claims 5 to 7, characterized in that: The generator is provided on the pallet,
Container according to any one of claims 5 to 8, characterized in that:

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