CN113557201B

CN113557201B - Storage warehouse

Info

Publication number: CN113557201B
Application number: CN202080019004.8A
Authority: CN
Inventors: 大野正树
Original assignee: Mars Inc
Current assignee: Mars Inc
Priority date: 2019-12-02
Filing date: 2020-11-30
Publication date: 2023-06-09
Anticipated expiration: 2040-11-30
Also published as: CN113557201A; WO2021112027A1; JP2021088369A; JP7441437B2

Abstract

The invention can restrain the reduction of the load and form an electric field in the storage space. The container (1) has: a container body (2) having a storage space (20) for storing objects; and an electrode (5) for forming an electric field in the storage space (20), the electrode (5) being embedded in the container body (2). The electrode (5) is plate-shaped. The container body (2) further comprises: a bottom plate part (24); a top plate portion (25) disposed opposite to the bottom plate portion (24); and a side wall portion (26) connecting the bottom plate portion (24) and the top plate portion (25), wherein the electrode (5) is embedded in the top plate portion (24). The top plate (25) has an insulating heat insulator (23) and an outer wall (22) provided on the outside of the heat insulator (23), and the electrode (5) is embedded in the heat insulator (23).

Description

Storage warehouse

Technical Field

The present invention relates to a storage library.

Background

As described in patent document 1, it is known that fresh food is kept fresh for a longer period of time than when no electric field is formed by forming an electric field in a storage space in a container and storing the fresh food in an atmosphere in which the electric field is formed. The container of patent document 1 is configured such that a plate-like electrode for forming an electric field in the container is provided on a bottom surface, a side surface, or a top surface in the container.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2012-250773

Disclosure of Invention

Technical problem to be solved by the invention

However, in patent document 1, since the electrode protrudes from the inner wall of the container into the storage space, the volume of the storage space is reduced, and accordingly the load is reduced.

The invention aims to provide a storage warehouse capable of inhibiting load reduction and forming an electric field in a storage space.

Means for solving the problems

The above object can be achieved by the present invention as described below.

(1) A memory bank comprising: a storage main body having a storage space for storing objects; and

an electrode for forming an electric field in the accommodation space,

the electrode is buried in the reservoir body.

(2) The memory bank according to the above (1), wherein the electrode is in a sheet form or a plate form.

(3) The storage library according to the above (1) or (2), wherein the storage library main body has: a bottom plate portion; a top plate portion disposed opposite to the bottom plate portion; and a side wall portion connecting the bottom plate portion and the top plate portion,

the electrode is buried in the top plate portion.

(4) The storage library according to the above (3), wherein the top plate portion has an insulating heat insulator and an outer wall provided on the outer side than the heat insulator,

the electrode is buried in the heat insulating member.

(5) The storage library according to the above (4), wherein a separation distance between the electrode and the outer wall is larger than a separation distance between the electrode and the storage space.

(6) The storage library according to the above (4) or (5), wherein the top plate portion has an inner wall provided on the inner side than the heat insulator,

the inner wall has insulation.

(7) The storage library according to any one of the above (1) to (6), wherein the bottom plate portion and the side wall portion have: an inner wall; an outer wall disposed outside the inner wall; and a heat insulator disposed between the inner wall and the outer wall.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, since the electrode is embedded in the memory bank main body, it is possible to provide a memory bank capable of suppressing a reduction in the load and forming an electric field in the storage space.

Drawings

Fig. 1 is a perspective view showing the whole of the container of embodiment 1.

Fig. 2 is a sectional view showing the inside of the reservoir body.

Fig. 3 is a cross-sectional view showing a top plate portion of the storage main body.

Fig. 4 is a cross-sectional view showing a modification of the electrode.

Fig. 5 is a cross-sectional view showing a modification of the electrode.

Fig. 6 is a cross-sectional view showing the inside of the bank main body of embodiment 2.

Fig. 7 is a diagram showing voltages applied to electrodes of the container according to embodiment 3.

Fig. 8 is a diagram showing voltages applied to electrodes of the container according to embodiment 3.

Fig. 9 is a diagram showing voltages applied to electrodes of the container according to embodiment 3.

Fig. 10 is a graph showing voltages applied to electrodes of the container according to embodiment 3.

Fig. 11 is a cross-sectional view showing the inside of the bank main body of embodiment 4.

Fig. 12 is a cross-sectional view showing the inside of the bank main body of embodiment 5.

Fig. 13 is a diagram showing a voltage applied to an electrode.

Detailed Description

Embodiment 1

The container 1 (storage) shown in fig. 1 is a mobile container mounted on a truck, a ship, an airplane, or the like. In particular, the container 1 of the present embodiment is a refrigerator having a cooling function, and includes: a storage main body 2 (container main body) having a storage space 20 for storing objects; a cooling device 3 for cooling the inside of the storage space 20; and an electric field forming device 4 that forms an electric field in the accommodation space 20. Container 1 is, for example, an international standard (ISO standard) and is a "20 foot container" having a total length of 20 feet or a "40 foot container" having a total length of 40 feet. By adopting the constitution based on the international standard as described above, the container 1 is excellent in convenience and versatility and also has sufficient reliability.

The container 1 is not necessarily based on the international standard (ISO standard), and the shape of the container 1 is not particularly limited. The container 1 may be a fixed container used in stores, warehouses, or the like, instead of a mobile container. Further, the container may be a container attached to a hopper of a truck or the like, for example. The storage tank is not limited to the container 1, and may be applied to a cooling warehouse, a refrigerator, or the like, for example.

The object is not particularly limited, and examples thereof include fish and shellfish such as fish, shrimp, crab, squid, octopus and shellfish and processed foods thereof; fruits such as strawberry, apple, banana, orange, grape, pear, etc., and processed foods thereof; vegetables such as cabbage, lettuce, cucumber, and tomato, and processed foods thereof; fresh foods such as beef, pork, chicken, horse meat, etc.; milk, cheese, yogurt, and other dairy products; various organs, particularly organs for transplantation, and the like. Among them, fresh foods are particularly preferred as the target. It is preferable that these objects be stored in a refrigerated state, i.e., in a non-frozen (non-frozen) state.

The storage main body 2 has a substantially rectangular parallelepiped shape extending in the depth direction in fig. 2, and a storage space 20 for storing objects is provided therein. As shown in fig. 2, the storage main body 2 includes an inner wall 21, an outer wall 22, and an insulating heat insulator 23 provided between the inner wall 21 and the outer wall 22. Thereby, the storage space 20 is sufficiently insulated, and is not easily affected by the outside air temperature. Therefore, the cooling device 3 can be used to efficiently cool the inside of the storage space 20. When the container 1 is used, the storage main body 2 (the inner wall 21 and the outer wall 22) is grounded. A member not shown may be interposed between the inner wall 21 and the heat insulator 23, between the outer wall 22 and the heat insulator 23, or inside the inner wall 21 or outside the outer wall 22.

The constituent materials of the inner wall 21 and the outer wall 22 are not particularly limited, and various metals such as stainless steel, iron, and aluminum can be used. Thereby, a strong and hard storage body 2 can be obtained. The heat insulator 23 is not particularly limited as long as it has insulation properties, and for example, glass wool, cellulose fibers, foam (foamed polyurethane, foamed polyethylene, foamed polypropylene, etc.), and the like can be used. This can exhibit excellent heat insulation.

The repository body 2 further includes: a bottom plate portion 24 located at a lower side in the vertical direction; a top plate portion 25 located on an upper side of the bottom plate portion 24 and opposed to the bottom plate portion 24; and a side wall portion 26 provided upright from the bottom plate portion 24 and connecting the bottom plate portion 24 and the top plate portion 25, and the storage space 20 is formed by being surrounded by these portions. The bottom plate 24, the top plate 25, and the side wall 26 are connected and fixed to each other by, for example, a frame 27. The method of connecting and fixing is not particularly limited, and for example, the outer walls and the inner walls may be fixed to each other by welding.

As shown in fig. 2, the bottom plate portion 24 and the side wall portion 26 each have an inner wall 21, an outer wall 22, and a heat insulator 23 provided between the inner wall 21 and the outer wall 22. In contrast, the top plate 25 includes an outer wall 22 and a heat insulator 23 provided inside the outer wall 22. That is, the top plate 25 is configured such that the inner wall 21 is omitted from the bottom plate 24 and the side wall 26, and the heat insulator 23 faces the storage space 20. In other words, in the transverse sectional view (sectional view perpendicular to the longitudinal direction), the storage main body 2 is constituted by a "コ" inner wall 21 open at the upper side in the vertical direction, a "ii" outer wall 22 provided outside the inner wall 21 and surrounding the inner wall 21, and a "ii" heat insulator 23 provided between the inner wall 21 and the outer wall 22, and the heat insulator 23 of the top plate 25 is exposed in the storage space 20. By not providing the inner wall 21 on the top plate 25 in this way, the electric field formation in the storage space 20 is less likely to be hindered as will be described later.

Further, a pair of

doors

28 and 29 are provided at the front end of the storage main body 2 in fig. 1. The object can be carried into the storage space 20 or carried out of the storage space 20 via the

doors

28 and 29. The arrangement and configuration of the

doors

28 and 29 are not particularly limited. On the other hand, the cooling device 3 is provided at the rear end of the storage main body 2 in fig. 1. In the container 1 of the present embodiment, the wall of the storage container body 2 at the rear end in fig. 1 is constituted by the panel of the cooling device 3, but the present invention is not limited thereto, and may be constituted by the side wall portion 26 of the storage container body 2.

As shown in fig. 2, the cooling device 3 is provided at the rear end portion of the storage space 20 as viewed from the

doors

28 and 29, and includes: an intake part 31 for sucking air in the storage space 20; a cooling device 32 that cools the air sucked from the suction unit 31; a blowing unit 33 for blowing cool air, which is air cooled by the cooling device 32, into the storage space 20; and a temperature sensor 34 that detects the temperature in the storage space 20.

The blowing-out portion 33 is provided near the bottom plate portion 24 of the storage space 20, and blows out cool air toward the bottom plate portion 24. The cool air blown out from the blowing-out portion 33 flows along the plurality of grooves 241 formed in the bottom plate portion 24 along the longitudinal direction of the storage main body 2, collides with the

doors

28, 29, or rises in front of them, and reaches the ceiling portion 25 of the storage space 20. On the other hand, the suction portion 31 is provided near the top plate portion 25, and sucks cool air rising from the bottom plate portion 24 to the top plate portion 25 or the vicinity thereof. The temperature and the air volume of the cool air are controlled so that the temperature in the storage space 20 detected by the temperature sensor 34 reaches the target temperature.

With such a configuration, the cool air can be circulated efficiently over the entire area of the storage space 20, and the temperature in the storage space 20 can be maintained at the target temperature. Therefore, the object stored in the storage space 20 can be cooled uniformly and appropriately. The settable temperature in the storage space 20 is not particularly limited, and is preferably about-30 ℃ to +30 ℃, for example. The configuration and arrangement of the cooling device 3 are not particularly limited, and the inside of the storage space 20 may be cooled.

The electric field forming device 4 has a function of forming an electric field in the housing space 20 and applying the formed electric field to the object housed in the housing space 20. As shown in fig. 2, the electric field forming apparatus 4 includes: an electrode 5 buried in the top plate 25 of the memory bank main body 2: and a voltage applying device 7 that applies a driving voltage (alternating voltage Vac) for forming an electric field to the electrode 5.

The electrode 5 is plate-shaped, particularly flat plate-shaped, and is widely provided in the substantially entire area of the top plate 25. This makes it possible to uniformly distribute the electric field over a wider range of the storage space 20. The electrode 5 is embedded in the heat insulator 23 of the top plate 25. That is, the electrode 5 is disposed inside the heat insulator 23. By embedding the electrode 5 in the heat insulator 23 of the top plate 25 in this manner, the electrode 5 does not protrude into the storage space 20, and therefore, a reduction in the volume (load) of the storage space 20 due to the electrode 5 can be prevented. Therefore, the container 1 is formed to be capable of accommodating a larger number of objects. Further, since the electrode 5 is insulated by the heat insulator 23 and the electrode 5 is not exposed in the storage space 20, the electrode 5 can be prevented from coming into contact with an object, for example.

In particular, by forming the electrode 5 in a plate shape, the thickness T of the electrode 5 can be suppressed, and the electrode 5 can be easily buried in the top plate portion 25. Further, the thickness of the heat insulator 23 of the top plate 25 is suppressed, and a decrease in the capacity (load) of the storage space 20 can be effectively suppressed. The thickness T of the electrode 5 is not particularly limited, and is preferably 2mm or less, more preferably 1mm or less, for example. This enables the electrode 5 to be extremely thin, and the above-described effects are more remarkable. The constituent material of the electrode 5 is not particularly limited as long as it has conductivity, and various metal materials such as aluminum and copper can be used.

The shape of the electrode 5 is not particularly limited. For example, the electrode 5 may be formed in a sheet shape (film shape) thinner than the above-described plate shape. Thereby, the thickness T of the electrode 5 is further suppressed, and the above effect is further remarkable. In this case, for example, aluminum foil, copper foil, or the like can be used as the electrode 5. The "plate-like" and the "sheet-like (film-like)" are not clearly distinguished, and for example, a structure that is hard to some extent and substantially free from deformation by self weight (except for slight deflection) may be regarded as "plate-like", and a structure that has flexibility and is deformed by self weight may be regarded as "sheet-like (film-like)".

As shown in fig. 3, the separation distance D1 between the electrode 5 and the outer wall 22 of the top plate 25 is larger than the separation distance D2 between the electrode 5 and the housing space 20 (the inner surface 251 of the top plate 25). That is, D1 > D2. This makes it possible to embed the electrode 5 in the heat insulator 23 and to increase the separation distance D1 as much as possible. Accordingly, the capacitance C formed between the electrode 5 and the outer wall 22 of the top plate 25 can be reduced accordingly. As a result, an electric field distributed between the electrode 5 and the outer wall 22 of the top plate 25 is less likely to be formed, and an electric field distributed in the storage space 20 is more likely to be formed. Therefore, the electric field can be efficiently and effectively applied to the object stored in the storage space 20. Although not particularly limited, it is preferable that the separation intervals D1 and D2 are each obtained by using an average separation interval.

The relation between the separation intervals D1 and D2 is preferably D1/D2.gtoreq.2, more preferably D1/D2.gtoreq.4, and still more preferably D1/D2.gtoreq.10. Thereby, the separation interval D1 becomes larger, and the above effect becomes more remarkable. That is, it is more difficult to form an electric field distributed between the electrode 5 and the outer wall 22 of the top plate portion 25, and it is easier to form an electric field distributed in the storage space 20. Therefore, the electric field can be more efficiently and effectively applied to the object stored in the storage space 20. The relationship between the separation intervals D1 and D2 is not limited to this, and D1 may be equal to or smaller than D2.

The structure of the electrode 5 is not particularly limited. For example, as shown in fig. 4, the electrode 5 may be corrugated. By forming irregularities on the surface of the electrode 5 in this manner, the surface area of the electrode 5 is increased as compared with, for example, a flat plate-like electrode 5. Therefore, an electric field distributed in the storage space 20 is easily formed. As shown in fig. 5, for example, a plurality of through holes 51 may be provided in the electrode 5. The through holes 51 may be provided regularly or irregularly in the entire region of the electrode 5. The shape of the through-hole 51 is not particularly limited, and may be, for example, a slit shape extending in the width direction or the longitudinal direction of the container 1.

The number of electrodes 5 to be provided is not particularly limited, and may be 2 or more, for example, as described in the embodiment described later. In other words, the electrode 5 of the present embodiment may be divided into a plurality of electrodes. The location of the electrode 5 is not particularly limited, and may be, for example, the bottom plate portion 24 or the side wall portion 26. When the electrode 5 is buried in the bottom plate portion 24, the electrode 5 may be buried in the heat insulator 23 of the bottom plate portion 24, the inner wall 21 may be removed from the bottom plate portion 24, and when the electrode 5 is buried in the side wall portion 26, the electrode 5 may be buried in the heat insulator 23 of the side wall portion 26, and the inner wall 21 may be removed from the side wall portion 26.

It is preferable that the electrode 5 is embedded in the top plate 25 as in the present embodiment. The 1 st reason is to suppress the decrease in strength. The inner wall 21 needs to be removed from the portion where the electrode 5 is buried, which may cause a decrease in the strength of the reservoir body 2 depending on the constitution of the container 1. When the inner wall 21 is removed from the top plate 25, it is considered that the strength of the storage main body 2 is less likely to be lowered than when the inner wall 21 is removed from the bottom plate 24 and the side wall 26. Further, the 2 nd reason is to suppress damage to the container 1. The frequency of contact of the top plate 25 with the object, the container tray on which the object is loaded, the forklift that conveys the container tray into the storage space 20, and the like is significantly less than that of the bottom plate 24 and the side wall 26. Since the inner wall 21 is removed at the portion where the electrode 5 is buried, the heat insulator 23 is exposed in the storage space 20, and the heat insulator 23 and the electrode 5 may be damaged by the contact. Therefore, by embedding the electrode 5 in the top plate portion 25 having a low contact frequency, damage to the container 1 can be more effectively suppressed.

The voltage applying device 7 includes, for example, a high-voltage transformer, and applies an alternating voltage Vac as a driving voltage for forming an electric field to the electrode 5 as shown in fig. 3. When the voltage applying device 7 applies the alternating voltage Vac to the electrode 5, an electric field is formed in the storage space 20 based on the potential difference between the electrode 5 and the grounded memory bank body 2. By applying the electric field to the object stored in the storage space 20, the freshness of the object can be maintained. Therefore, the object can be stored for a longer period of time than in the case where the electric field is not formed. In particular, in the present embodiment, the electrode 5 is provided in a wide range in the substantially entire range of the top plate 25, so that an electric field can be effectively formed in the entire region of the storage space 20.

The amplitude of the alternating voltage Vac is not particularly limited, but is preferably about 0.1kV to 20kV, for example. By applying the alternating voltage Vac of such an amplitude to the electrode 5, an electric field of sufficient strength can be formed in the housing space 20, and the above-described effects can be more reliably exhibited. The frequency of the alternating voltage Vac is not particularly limited, but is preferably, for example, about 5Hz to 50 kHz. The waveform of the alternating voltage Vac may be any waveform such as a sine wave, a rectangular wave, or a sawtooth wave.

< embodiment 2 >

Next, the container 1 according to embodiment 2 will be mainly described in the differences from embodiment 1.

As shown in fig. 6, in the container 1 of the present embodiment, the top plate 25 includes an inner wall 21, an outer wall 22, and a heat insulator 23 provided between the inner wall 21 and the outer wall 22, similarly to the bottom plate 24 and the side wall 26. By providing the inner wall 21 also in the top plate 25 in this manner, the strength of the container 1 can be improved as compared with a structure in which the inner wall 21 is not present, for example, as in embodiment 1. In addition, the heat insulator 23 can be prevented from being exposed in the storage space 20, and the heat insulator 23 and the electrode 5 can be protected.

The inner wall 21 of the top plate 25 has insulation. Thus, the inner wall 21 of the top plate 25 functions like a shield layer, and the inner wall 21 of the top plate 25 can prevent the electric field formation in the storage space 20 from being blocked. The material constituting the inner wall 21 of the top plate 25 is not particularly limited as long as it has insulation properties, and for example, various resin materials, various glass materials, various ceramics, and the like can be used. Among them, various ceramics are preferably used from the viewpoint of mechanical strength.

According to embodiment 2 as described above, the same effects as those of embodiment 1 can be exhibited.

Embodiment 3

Next, the container 1 according to embodiment 3 will be mainly described in the differences from embodiment 1.

In embodiment 3, the voltage applying device 7 changes the state of the electric field formed in the housing space 20 with time. By changing the state of the electric field in the storage space 20 with time, the proliferation (division) of microorganisms contained in the food can be suppressed as compared with, for example, the case where the state of the electric field in the storage space 20 is kept constant. Therefore, the freshness of the object stored in the storage space 20 can be maintained for a longer period of time.

The reason why the propagation of microorganisms can be suppressed by changing the state of the electric field in the storage space 20 with time is that the microorganisms start to divide after being used to a certain degree to their environment. By changing the state of the electric field with time, the environment can be switched to a different environment before the current environment in which the microorganisms are used, and thus the environment in which the microorganisms are used can be suppressed, and as a result, the proliferation of the microorganisms can be suppressed. Examples of the microorganisms included in the object include salmonella, enterohemorrhagic escherichia coli (O157, O111, etc.), vibrio enteritis, clostridium perfringens, staphylococcus aureus, clostridium botulinum, bacillus cereus, and norovirus, which are considered to cause food poisoning.

Here, the term "changing the state of the electric field with time" means, for example, changing at least one of the amplitude and the frequency of the alternating voltage Vac applied to the electrode 5 with time. The method for changing the state of the electric field with time is not particularly limited, and for example, the following methods can be mentioned.

As the 1 st method, as shown in fig. 7, there is a method of intermittently applying an alternating voltage Vac of a reference of 0V and having a constant amplitude and frequency to the electrode 5. In fig. 7, the voltage applying device 7 alternately repeats the 1 st state in which the alternating voltage Vac is applied to the electrode 5 and the 2 nd state in which the alternating voltage Vac is not applied to the electrode 5. That is, the 1 st state in which the electric field is formed in the storage space 20 and the 2 nd state in which the electric field is not formed are alternately repeated. By alternately repeating the 1 st state and the 2 nd state in this manner, the state of the electric field can be changed with time with relatively simple control.

As the 2 nd method, as shown in fig. 8, there is a method of varying the amplitude of the alternating voltage Vac applied to the electrode 5 with time. The term "change the amplitude of the alternating voltage Vac with time" means that the amplitude of the alternating voltage Vac may be changed periodically or irregularly. In fig. 8, the voltage applying device 7 alternately repeats the 1 st state of applying the alternating voltage Vac with the reference of 0V and the amplitude of E1 to the electrode 5 and the 2 nd state of applying the alternating voltage Vac with the reference of 0V and the amplitude of E2 (+.e1) to the electrode 5. By alternately repeating the 1 st state and the 2 nd state, the state of the electric field can be changed with time with relatively simple control.

The amplitude E1 is preferably 2 times or more, more preferably 3 times or more, and even more preferably 4 times or more the amplitude E2. Thus, the state of the electric field in the storage space 20 can be sufficiently different between the 1 st state and the 2 nd state, and the microorganism habit environment can be effectively suppressed.

As the 3 rd method, as shown in fig. 9, a method of changing the frequency of the alternating voltage Vac applied to the electrode 5 with time can be mentioned. The term "change the frequency of the alternating voltage Vac with time" means that the frequency of the alternating voltage Vac may be changed periodically or irregularly. In fig. 9, the voltage applying device 7 alternately repeats the 1 st state of the alternating voltage Vac with the frequency f1 applied to the electrode 5 and the 2 nd state of the alternating voltage Vac with the frequency f2 (+.f1) applied to the electrode 5. By alternately repeating the 1 st state and the 2 nd state, the state of the electric field can be changed with time with relatively simple control.

The frequency f1 is preferably 10 times or more, more preferably 50 times or more, and even more preferably 100 times or more the frequency f 2. This makes it possible to sufficiently change the state of the electric field in the storage space 20 between the 1 st state and the 2 nd state, and effectively suppress the environment to which microorganisms are accustomed.

As a 4 th method, as shown in fig. 10, there is a method in which an alternating voltage Vac having a reference of 0V and constant amplitude and frequency is applied to the electrode 5, and a bias voltage Vb (constant voltage) is intermittently applied. In fig. 10, the voltage applying device 7 alternately repeats the 1 st state of the superimposed voltage Vd in which the alternating voltage Vac and the bias voltage Vb are applied to the electrode 5 and the 2 nd state of the alternating voltage Vac is applied to the electrode 5. By alternately switching the 1 st state and the 2 nd state, the state of the electric field can be changed with time with relatively simple control. In particular, since the alternating voltage Vac can be kept constant in this method, the method is simpler to control than the 2 nd and 3 rd methods in which the amplitude and frequency of the alternating voltage Vac are changed.

The bias voltage Vb is smaller than the amplitude (maximum value) of the alternating voltage Vac. This makes it possible to set the superimposed voltage Vd to an ac voltage. Therefore, in the 1 st state, an electric field can be more reliably formed in the storage space 20. The bias voltage Vb is preferably 0.1 to 0.6 times, more preferably 0.2 to 0.5 times, and even more preferably 0.3 to 0.4 times the amplitude of the alternating voltage Vac. This can equalize the time when the superimposed voltage Vd is on the positive side and the time when it is on the negative side, that is, can prevent one side from being too long as compared with the other side, and can more efficiently form an electric field in the storage space 20 in the 1 st state. In addition, the state of the electric field in the storage space 20 can be sufficiently different between the 1 st state and the 2 nd state, and the microorganism habit environment can be effectively suppressed.

As described above, the 1 st to 4 th methods are described as methods for changing the state of the electric field with time. In the methods 1 to 4, the state of the electric field also varies depending on the temperature in the storage space 20 and the type of the object (the type of the microorganism contained in the food) stored in the storage space 20, but the state of the electric field is preferably changed at intervals of 1 minute or more and 60 minutes or less, more preferably at intervals of 2 minutes or more and 40 minutes or less, and still more preferably at intervals of 3 minutes or more and 30 minutes or less. In other words, the time of the 1 st and 2 nd states is preferably 1 minute or more and 60 minutes or less, more preferably 2 minutes or more and 40 minutes or less, and still more preferably 3 minutes or more and 30 minutes or less, respectively. Thus, the time of the 1 st state and the time of the 2 nd state are sufficiently shortened, respectively, and the environment can be switched to a different environment before the microorganism becomes accustomed to the current environment more reliably. In addition, the time of the 1 st state and the time of the 2 nd state can be prevented from becoming too short, respectively, and the microorganism can be effectively prevented from returning to the original environment before starting to cope with the new environment. That is, the state of the electric field can be changed at intervals slightly shorter than the division speed of the microorganism. This can more effectively inhibit the division of microorganisms. The time of the 1 st state and the time of the 2 nd state may be the same or different.

It is known that microorganisms (1) have a division rate of about 10 minutes to 40 minutes in a temperature range of about 10 ℃ to 40 ℃, that (2) the lower the temperature is, the slower the division rate is, (3) if the temperature is 10 ℃ or lower, the microorganisms are not substantially proliferated except for a part of the microorganisms, and that (4) the microorganisms are not substantially proliferated in total at 0 ℃ or lower. Therefore, as described above, by changing the state of the electric field at intervals of 60 minutes or less, preferably 40 minutes or less, and more preferably 30 minutes or less, the state of the electric field can be changed at intervals sufficiently shorter than the division rate of the microorganism, taking into consideration the time until the environment where the microorganism is accustomed (for example, about 10 minutes). Therefore, the proliferation of microorganisms can be more reliably suppressed.

In any of the methods 1 to 4, the electric field may be changed periodically or irregularly. In other words, the 1 st state time and the 2 nd state time may be substantially the same each time, or the 1 st state time and the 2 nd state time may be irregularly changed each time. By periodically varying the electric field, the drive control of the voltage applying means 7 becomes simple as compared with the case where the electric field is irregularly varied. On the other hand, by irregularly changing the electric field, there is a possibility that the proliferation of microorganisms can be more effectively suppressed than in the case of periodically changing the electric field. Although it is presumed that when the electric field is periodically changed, the microorganism may become accustomed to the periodic environmental change itself. In this way, even if the periodic environmental change itself of the habit of microorganisms is present, the propagation of microorganisms can be more effectively suppressed by irregularly changing the electric field.

The above-described 1 st to 4 th methods may be appropriately combined as a method for changing the state of the electric field with time. In the above-described 1 st to 4 th methods, the 1 st state and the 2 nd state are alternately repeated, but the method is not limited thereto, and may be performed by having at least 1 state (3 rd state, 4 th state, 5 th state …) in which the electric field state is different from the 1 st state and the 2 nd state, and sequentially or randomly repeating the plurality of states.

Embodiment 4

Next, the container 1 according to embodiment 4 will be mainly described in the differences from embodiment 1.

As shown in fig. 11, in the container 1 of the present embodiment, 3 electrodes 5 are buried in the heat insulator 23 of the top plate 25. Hereinafter, for convenience of explanation, these 3 electrodes 5 will also be referred to as

electrodes

5A, 5B, 5C.

The 3

electrodes

5A, 5B, 5C are arranged in the width direction of the container 1 and are arranged apart from each other. The

electrodes

5A, 5B, 5C each have a longitudinal shape extending in the longitudinal direction of the container 1. The

electrodes

5A, 5B, and 5C are independently connected to the voltage applying device 7. Thus, 3 electric field forming systems can be provided, and even if 1 electric field forming system fails, an electric field can be formed using the other 2 electric field forming systems. This reduces the risk of failure to form an electric field, and can exhibit high reliability.

The voltage applying device 7 may apply voltages different from each other to the

electrodes

5A, 5B, and 5C. By applying voltages different from each other to the

electrodes

5A, 5B, 5C, the electric field can be changed periodically or irregularly as in embodiment 2.

The voltages applied to the

electrodes

5A, 5B, 5C are not particularly limited. For example, the 1 st alternating voltage Vac1 as the voltage applied to the electrode 5A, the 2 nd alternating voltage Vac2 as the voltage applied to the electrode 5B, and the 3 rd alternating voltage Vac3 as the voltage applied to the electrode 5C may be different in frequency from each other. For example, the 1 st alternating voltage Vac1, the 2 nd alternating voltage Vac2, and the 3 rd alternating voltage Vac3 may be different in frequency and amplitude. For example, the 1 st alternating voltage Vac1, the 2 nd alternating voltage Vac2, and the 3 rd alternating voltage Vac3 may be shifted in phase by using the same waveforms.

In the present embodiment, the plurality of electrodes to which the voltages different from each other are applied include the

electrodes

5A, 5B, and 5C, but the present invention is not limited thereto, and any configuration may be adopted as long as the electrodes have at least 2 electrodes 5 and the same or different voltages are applied to the electrodes. For example, any 1 of the

electrodes

5A, 5B, and 5C may be omitted, or conversely, at least 1 electrode capable of independently applying a voltage may be added to these electrodes.

In the present embodiment, the

electrodes

5A, 5B, 5C are arranged in the width direction of the container 1, but the arrangement is not particularly limited. For example, the

electrodes

5A, 5B, 5C may be arranged in the longitudinal direction of the container 1. The

electrodes

5A and 5B may be arranged in the width direction of the container 1, and the

electrodes

5A and 5B and the electrode 5C may be arranged in the longitudinal direction of the container 1.

Embodiment 5

Next, the container 1 according to embodiment 5 will be mainly described in the differences from embodiment 1.

As shown in fig. 12, in the container 1 of the present embodiment, 2 electrodes 5 are buried in the heat insulator 23 of the top plate 25. Hereinafter, for convenience of explanation, these 2 electrodes 5 will also be referred to as

electrodes

5A, 5B. The voltage application device 7 applies the 1 st alternating voltage Vac1 to the electrode 5A and applies the 2 nd alternating voltage Vac2 having a phase opposite to that of the 1 st alternating voltage Vac1 to the electrode 5B. As shown in fig. 13, the 1 st alternating voltage Vac1 and the 2 nd alternating voltage Vac2 have the same waveform, and the frequency and the amplitude are the same as each other.

Since the bank body 2 is grounded, the 1 st alternating voltage Vac1 and the 2 nd alternating voltage Vac2 are shifted in phase by 180 °, that is, by shifting the phases by 180 °, the potential difference Δv1 between the electrode 5A and the electrode 5B is larger than the potential difference Δv2 between the electrode 5A and the bank body 2 and the potential difference Δv3 between the electrode 5B and the bank body 2. That is, Δv1 > Δv2 and Δv1 > Δv3 are defined. Therefore, an electric field is easily formed between the electrode 5A and the electrode 5B, compared to between the electrode 5A and the bank main body 2, and between the electrode 5B and the bank main body 2.

Therefore, the electric field can be formed in a wider range of the storage space 20, and the electric field can be efficiently applied to the object at any position in the storage space 20. The term "opposite phase" includes a case where the phase difference between the 1 st alternating voltage Vac1 and the 2 nd alternating voltage Vac2 is 180 ° and a case where there is a small error (for example, ±10%) that may occur in the art.

The memory bank of the present invention has been described above based on the illustrated embodiment, but the present invention is not limited to this. For example, the structure of each part may be replaced with an arbitrary structure that performs the same function, and an arbitrary structure may be added. The above embodiments may be appropriately combined.

Industrial applicability

As described above, the container 1 of the present invention includes: a storage main body 2 having a storage space 20 for storing objects; and an electrode 5 for forming an electric field in the storage space 20, the electrode 5 being embedded in the memory bank body 2. Therefore, the electrode 5 does not protrude into the storage space 20, and therefore, a reduction in the volume (load) of the storage space 20 due to the electrode 5 can be prevented. Therefore, the container 1 is formed to be capable of accommodating a larger number of objects. Further, since the electrode 5 is insulated by the heat insulator 23, the electrode 5 is not exposed in the storage space 20, and thus, for example, the electrode 5 can be prevented from coming into contact with an object.

Description of the reference numerals

1 … container, 2 … storage main body, 20 … storage space, 21 … inner wall, 22 outer wall, 23 … heat insulator, 24 … bottom plate portion, 241 … trough, 25 … top plate portion, 251 … inner face, 26 … side wall portion, 27 … skeleton, 28 … door, 29 … door, 3 … cooling device, 31 … suction portion, 32 … cooling device, 33 … blow-out portion, 34 … temperature sensor, 4 … electric field forming device, 5 … electrode, 5A … electrode, 5B … electrode, 5C … electrode, 7 … voltage applying device, 51 … through hole, C … capacitor, D1 … separation interval, D2 … separation interval

Claims

1. A storage library, comprising:

a storage main body having a storage space for storing objects; and

an electrode for forming an electric field in the accommodation space,

the electrodes are buried in the reservoir body,

wherein the repository body has: a bottom plate portion; a top plate portion disposed opposite to the bottom plate portion; and a side wall portion connecting the bottom plate portion and the top plate portion,

the electrode is buried in the top plate portion,

wherein the top plate portion has an insulating heat insulator and an outer wall provided outside the heat insulator,

the electrode is buried in the heat insulating member,

wherein, the separation interval of the electrode and the outer wall is larger than the separation interval of the electrode and the containing space.

2. The storage library of claim 1, wherein,

the electrode is in a film shape or a plate shape.

3. The storage library of claim 1, wherein,

the top plate portion has an inner wall disposed on an inner side than the heat insulating member,

the inner wall has insulation.

4. The storage library of any one of claims 1 to 3, wherein,

the bottom plate portion and the side wall portion have: an inner wall; an outer wall disposed outside the inner wall; and a heat insulator disposed between the inner wall and the outer wall.