JP2021009005A - Electric field generator and cold storage box including the same - Google Patents

Abstract

To provide an electric field generator and a cold storage box including the same, which can generate an adjustable electric field.SOLUTION: An electric field generator includes: electrodes (31a to 31f, 32a to 32f); and a voltage application device (33) for applying a voltage to the electrodes (31a to 31f, 32a to 32f). The electric field generator (30) for generating an electric field in a storage space (S) of a container (5) is provided with an electric field controller (35) for controlling the voltage to be applied to the electrodes (31a to 31f, 32a to 32f). The electric field controller (35) increases or decreases the voltage to be applied to the electrodes (31a to 31f, 32a to 32f) in accordance with a state of the electric field generated in the storage space (S) of the container (5).SELECTED DRAWING: Figure 4

Description

The present disclosure relates to an electric field generator and a cold storage equipped with the electric field generator.

Conventionally, in a food storage or the like, an electric field generator that generates an electric field in the storage has been used in order to maintain the freshness of the food stored in the storage (see, for example, Patent Document 1 below).

The electric field generator disclosed in Patent Document 1 includes a planar electrode and a voltage applying device that applies a voltage to the planar electrode. In the electric field generator, an electric field is formed in the storage by applying a voltage to the planar electrodes.

Japanese Patent No. 5682037

However, in the electric field generator, food is stored in a natural electric field environment only by applying a predetermined voltage to the planar electrode to generate an electric field. Therefore, the electric field actually formed in the storage may not be in a desired state suitable for maintaining the freshness of food.

An object of the present disclosure is to make the generated electric field adjustable in an electric field generator and a cold storage equipped with the electric field generator.

The first aspect of the present disclosure includes electrodes (31a to 31f, 32a to 32f) and a voltage applying device (33) for applying a voltage to the electrodes (31a to 31f, 32a to 32f), and is a storage of food. (5) An electric field generator that generates an electric field in the refrigerator, and includes a control unit (35) that controls a voltage applied to the electrodes (31a to 31f, 32a to 32f), and the control unit (35). ) Is applied to the electrodes (31a to 31f, 32a to 32f) depending on the state of the electric field generated in the storage (5) or the state of the contents contained in the storage (5). It is characterized by increasing or decreasing the voltage.

In the first aspect, the freshness of the contained material (6) is increased or decreased according to the state of the electric field generated in the storage (5) or the state of the contained material contained in the storage (5). An electric field suitable for holding can be generated.

In the second aspect of the present disclosure, in the first aspect, the control unit (35) has the strength of the electric field generated in the storage (5) or the voltage in the storage (5). It is characterized in that the voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased so as to be in a desired range.

In the second aspect, the electrodes (31a to 31f, 32a to 32f) are set so that the strength of the electric field generated in the storage (5) or the voltage in the storage (5) is in the desired range. By increasing or decreasing the applied voltage, the strength of the electric field generated in the storage (5) or the voltage in the storage (5) can be transferred to the container (6) housed in the storage (5). It can be adjusted to the strength or voltage of the electric field suitable for maintaining the freshness of.

A third aspect of the present disclosure is, in the second aspect, provided with measuring devices (34a to 34f) provided at at least one place in the storage (5) and measuring the strength or voltage of the electric field. The control unit (35) increases or decreases the voltage applied to the electrodes (31a to 31f, 32a to 32f) so that the values measured by the measuring instruments (34a to 34f) are within the desired range. It is a feature.

In the third aspect, the voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased so that the measured value of the measuring device (34a to 34f) for measuring the strength or voltage of the electric field is within a desired range. By doing so, the strength or voltage of the electric field can be adjusted accurately within a desired range.

In a fourth aspect of the present disclosure, in the second aspect, the control unit (35) has at least one of the temperature and humidity of the air inside the storage (5) and the storage (5) given in advance. Based on the information of the contained material (6) housed in the storage (6), the strength or voltage of the electric field at at least one place in the storage (5) is estimated so that the estimated value is within the desired range. , It is characterized in that the voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased.

In the fourth aspect, the strength or voltage of the electric field can be adjusted to a desired range suitable for storage of the containment (6) even if the temperature or humidity in the storage (5) changes.

In a fifth aspect of the present disclosure, in the first aspect, the control unit (35) has the electrodes (31a to 31f,) depending on the freshness of the container (6) contained in the storage (5). It is characterized in that the voltage applied to 32a to 32f) is increased or decreased.

In the fifth aspect, the voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased according to the freshness of the container (6) housed in the storage (5), whereby the container (6) is used. It is possible to generate an electric field suitable for the maturity of the above.

A sixth aspect of the present disclosure is a cold storage provided with a food storage (5) and a freezing device (10) for cooling the inside of the storage (5), and any of the first to fifth aspects. It is characterized in that it includes an electric field generator (30) of one aspect.

In the sixth aspect, an electric field suitable for maintaining the freshness of the contained material (6) can be generated in the storage (5) of the cold storage.

FIG. 1 is a cross-sectional view of the reefer container according to the first embodiment. FIG. 2 is a perspective view showing a container refrigerating device provided in the reefer container according to the first embodiment. FIG. 3 is a cross-sectional view of the reefer container according to the first embodiment cut in a plane orthogonal to the longitudinal direction. FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a cross-sectional view corresponding to FIG. 4 of the reefer container according to the first modification of the first embodiment. FIG. 6 is a cross-sectional view corresponding to FIG. 4 of the reefer container according to the second modification of the first embodiment. FIG. 7 is a cross-sectional view corresponding to FIG. 4 of the reefer container according to the second embodiment. FIG. 8 is a cross-sectional view corresponding to FIG. 4 of the reefer container according to the third embodiment.

<< Embodiment 1 >>
In the first embodiment, an example in which the electric field generator of the present disclosure is applied to a reefer container will be described.

The reefer container (cold storage) (1) is a container (5), which is a mobile storage for storing items such as fresh food, and a refrigerator that adjusts the temperature of the internal space (S) of the container (5). It has a container refrigeration device (10) and the electric field generator (30). The electric field generator (30) is provided to maintain the freshness of the fresh food stored in the internal space (S) by generating an electric field in the internal space (S) of the container (5). ..

[container]
As shown in FIGS. 1 to 4, the container (5) is a mobile storage used for land transportation, sea transportation, and the like. The container (5) is formed in the shape of a rectangular parallelepiped box with one end in the longitudinal direction open. One end of the container (5) is closed by a container refrigerating device (10). At the other end of the container (5), a carry-in / out port for loading / unloading the cargo to be stored in the internal space (S) is formed, and the carry-in / out port is closed by an opening / closing door.

[Refrigerator for containers]
As shown in FIGS. 1 and 2, the container refrigerating device (10) cools the inside of the container (5) used for land transportation, marine transportation, and the like. The container refrigerating device (10) has a compressor (20), a radiator (21), an expansion valve (not shown), and an evaporator (23) to perform a refrigerating cycle operation (not shown). It has. The container refrigerating device (10) is attached to one end of the container (5) and closes the one end.

The container refrigerating device (10) includes a casing (11) and a partition plate (14) provided on the back surface (inside the refrigerator) of the casing (11). At the lower part of the casing (11), a bulging portion (12) bulging inside the refrigerator is formed. The internal space (space outside the refrigerator) of the bulge (12) is configured as the storage space (S1) outside the refrigerator, and is located above the bulge (12) at the upper part of the back surface of the casing (11). An internal storage space (S2) is formed.

A compressor (20), a radiator (21), an external fan (25), an inverter box (15), and an electrical component box (16) are housed in the external storage space (S1). The compressor (20) sends the refrigerant to the radiator (21). The radiator (21) exchanges heat between the refrigerant and the air outside the refrigerator. The external fan (25) is arranged above the radiator (21) and forms an air flow through the radiator (21). The inverter box (15) houses the circuit board (not shown) of the inverter connected to the compressor (20). The electrical component box (16) contains a controller (17) and the like that control the operation of the container refrigerating device (10). The controller (17) includes a microcomputer mounted on a control board and a memory device (specifically, a semiconductor memory) for storing software for operating the microcomputer. The controller (17) controls each device of the reefer container (1) based on the operation command and the detection signal of the sensor. The above equipment layout in the storage space outside the refrigerator (S1) is an example, and can be changed as needed.

An evaporator (23) and an internal fan (26) are installed in the internal storage space (S2). The internal fan (26) supplies the internal air to the evaporator (23), and in the evaporator (23), the refrigerant flowing through the heat transfer tube takes heat from the internal air and cools the internal air. Between the bulging portion (12) and the partition plate (14), there is an internal air flow path (S3) through which the internal air flows. The upper end of the internal air flow path (S3) communicates with the internal storage space (S2), while the lower end communicates with the internal storage space (S2).

[Electric field generator]
As shown in FIGS. 3 and 4, the electric field generator (30) includes a plurality of electrodes (31a to 31f, 32a to 32f), a voltage application device (33), and a plurality of electric field strength meters (34a to 34f). ) And an electric field controller (35).

The plurality of electrodes (31a to 31f, 32a to 32f) are formed in a flat plate shape by a conductive material. A plurality of electrodes (31a to 31f, 32a to 32f) are provided on the left and right wall surfaces of the container (5) in the same number (six in the present embodiment). As shown in FIG. 4, the electrodes (31a to 31f) provided on the right side wall surface of the container (5) and the electrodes (32a to 32f) provided on the left side wall surface are arranged so as to face each other one by one. ing. A plurality of electrode pairs (31a to 31f, 32a to 32f) are composed of electrodes (31a to 31f) provided on the right side wall surface of the container (5) and electrodes (32a to 32f) provided on the left side wall surface. There is. In the first embodiment, as shown in FIG. 4, the first to sixth electrode pairs (31a to 31f, 32a to 32f) are provided in the internal space (S) of the container (5).

The voltage application device (33) is housed in the storage space (S1) outside the refrigerator. Although not shown, the voltage application device (33) has a plurality of power supply circuits (36) connected to each electrode pair (31a to 31f, 32a to 32f). Although not shown, each power supply circuit (36) has an AC power supply device, a rectifier circuit, an inverter circuit, and a booster, and applies a voltage between each electrode pair (31a to 31f, 32a to 32f). The voltage to be applied is variably configured as well as being applied. The voltage application device (33) is configured so that each power supply circuit (36) can apply a voltage of 0.5 kV to 10 kV between the corresponding electrode pairs (31a to 31f, 32a to 32f). The voltage applied between the first to sixth electrode pairs (31a to 31f, 32a to 32f) is controlled by the electric field controller (35).

A plurality of electric field strength meters (34a to 34f) are provided one by one in a plurality of control areas (7a to 7f) in which the interior space (S) of the container (5) is divided into a plurality of units. Each electric field strength meter (34a to 34f) is configured to measure the electric field strength at the installation location and transmit the measured value to the electric field controller (35).

As shown in FIG. 4, the control areas (7a to 7f) have the internal space (S) of the container (5) as the first to sixth electrode pairs (31a to 31f, 32a to 32a) in the first embodiment. It is formed by dividing it into six parts corresponding to 32f). That is, in the first embodiment, the first to sixth control areas (7a to 7f) are formed in the internal space (S) of the container (5). When a voltage is applied from the power supply circuits (36) corresponding to the first to sixth electrode pairs (31a to 31f, 32a to 32f), an electric field is generated in the corresponding control areas (A1 to A6).

The electric field controller (35) includes a microcomputer mounted on a control board and a memory device (specifically, a semiconductor memory) for storing software for operating the microcomputer. The electric field controller (35) controls each device of the electric field generator (30) based on the operation command and the detection signal of the sensor.

The electric field controller (35) uses each control area (7a to 7f) based on information such as the item, load capacity, and loading position of the luggage (6) loaded in the first to sixth control areas (7a to 7f) input in advance. ), And each electrode pair (7a to 7f) so that the measured value of the electric field strength meter (34a to 34f) corresponding to each control area (7a to 7f) is within the target range. It is configured to increase or decrease the voltage applied to 31a to 31f and 32a to 32f).

-Driving operation-
<Operation of refrigeration equipment>
The operation of the container refrigerating device (10) is started by activating the compressor (20), the external fan (25), and the internal fan (26). In the refrigerant circuit of the container refrigerating device (10), the discharged refrigerant of the compressor (20) is sent to the radiator (21). In this radiator (21), the refrigerant circulating inside exchanges heat with the outside air sent by the outside fan (25). As a result, the refrigerant dissipates heat to the outside air and condenses.

The refrigerant condensed by the radiator (21) is depressurized by the expansion valve and then sent to the evaporator (23). In this evaporator (23), the refrigerant circulating inside exchanges heat with the air inside the refrigerator sent by the fan (26) inside the refrigerator. As a result, the refrigerant absorbs heat from the internal air and evaporates, and the internal air is cooled. As shown in FIG. 1, the air inside the refrigerator flows into the storage space (S2) inside the refrigerator from above the partition plate (14) and passes through the evaporator (23). The air inside the refrigerator is cooled by the evaporator (23) and then returns to the inside of the refrigerator from the lower side of the partition plate (14). The refrigerant vaporized in the evaporator (23) is sucked into the compressor (20) and compressed again.

<Operation of electric field generator>
In the electric field generator (30), the operation of the voltage application device (33) is controlled by the electric field controller (35), and the first to sixth electrode pairs (31a to 31f, 32a to 32f) from the voltage application device (33). AC voltage is applied to. As a result, an electric field is formed between the first to sixth electrode pairs (31a to 31f, 32a to 32f). By forming the electric field in this way, it becomes easy to maintain the freshness of the fresh food stored in the container (5). The freshness of the fresh food is maintained because the fresh food is stored in a supercooled state by the electric field.

In addition, the electric field controller (35) uses each control area (7a) based on information such as the item, load capacity, and loading position of the luggage (6) loaded in the first to sixth control areas (7a to 7f) input in advance. Set the target range of the electric field strength of ~ 7f), and set each electrode pair (31a ~ 31f, 32a ~ 32f) so that the measured value of each electric field strength meter (34a ~ 34f) is within the target range. Increase or decrease the voltage applied to.

For example, when the target range of the electric field strength in the first control area (7a) is 2 kV to 4 kV and the measured value of the electric field strength meter (34a) provided in the first control area (7a) is 3 kV, the electric field controller ( In 35), the voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a) is maintained without increasing or decreasing. When the measured value of the electric field strength meter (34a) provided in the first control area (7a) is 1 kV, the electric field controller (35) generates an electric field in the first control area (7a). , 32a) Increase the voltage applied between them by one step. On the other hand, when the measured value of the electric field strength meter (34a) provided in the first control area (7a) is 5 kV, the electric field controller (35) applies a voltage of 1 between the first electrode pairs (31a, 32a). Step down.

As described above, the electric field controller (35) has the first to sixth electrode pairs (31a to 31f, 32a to 32f) according to the state of the electric field generated in the first to sixth control areas (7a to 7f). ) Is increased or decreased. In the first embodiment, the electric field controller (35) has an electric field in each control area (7a to 7f) according to the strength of the electric field (electric field strength) generated in the first to sixth control areas (7a to 7f). The voltage applied to the first to sixth electrode pairs (31a to 31f, 32a to 32f) is increased or decreased so that the intensity is within the respective target ranges. By controlling the electric field controller (35) in this way, each part of the internal space (S) of the container (5) is maintained at an electric field strength suitable for maintaining the freshness of the luggage (6) loaded in that part. It will be.

-Effect of Embodiment 1-
The electric field generator (30) of the first embodiment includes electrodes (31a to 31f, 32a to 32f) and a voltage application device (33) that applies a voltage to the electrodes (31a to 31f, 32a to 32f). , An electric field is generated in the internal space (S) of the container (5). The electric field generator (30) includes an electric field controller (35) that controls the voltage applied to the electrodes (31a to 31f, 32a to 32f), and the electric field controller (35) is housed in the container (5). The voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased according to the state of the generated electric field.

In the electric field generator (30) of the first embodiment, the applied voltage of the load (6) loaded in the container (5) is increased or decreased according to the state of the electric field generated in the container (5). An electric field suitable for maintaining freshness can be generated.

In the electric field generator (30) of the first embodiment, in the above configuration, the electric field controller (35) makes the electric field strength (electric field strength) generated in the container (5) within a desired range. , The voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased.

In the electric field generator (30) of the first embodiment, the electrodes (31a to 31f, 32a to 32f) are arranged so that the strength of the electric field (electric field strength) generated in the container (5) is within a desired range. By increasing or decreasing the voltage applied to the container (5), the internal space (S) of the container (5) can be adjusted to an electric field strength suitable for maintaining the freshness of the luggage (6) loaded in the container (5). it can.

In the above configuration, the electric field generator (30) of the first embodiment is provided at at least one place in the refrigerator of the container (5), and is an electric field strength meter (34a to 34f) for measuring the strength of the electric field (electric field strength). ), The electric field controller (35) increases or decreases the voltage applied to the electrodes (31a to 31f, 32a to 32f) so that the values measured by the electric field strength meters (34a to 34f) are within the desired range. It is something that makes you.

In the electric field generator (30) of the first embodiment, the electrodes (31a to 31f, 32a) are set so that the measured values of the electric field strength meters (34a to 34f) for measuring the electric field strength (electric field strength) are in a desired range. By increasing or decreasing the voltage applied to ~ 32f), the strength of the electric field (electric field strength) can be adjusted to a desired range with high accuracy.

Further, the reefer container (1) of the first embodiment is a cold storage device provided with a container (5) and a container refrigerating device (10) for cooling the inside of the container (5), and the electric field generator. (30) is provided.

According to the reefer container (1) of the first embodiment, since the electric field generator (30) is provided, it is suitable for keeping the freshness of the luggage (6) loaded in the container (5) of the reefer container (1). It is possible to generate an electric field.

− Modification 1 of Embodiment 1
In the first modification of the first embodiment, in the first embodiment, a plurality of electric field strength meters (34a1,34a2, ..., 34f1,34f2) are provided in each control area (7a to 7f), and the control by the electric field controller (35) is performed. It is a modified version.

As shown in FIG. 5, in the first modification, two electric field strength meters (34a1,34a2, ..., 34f1,34f2) are provided in each control area (7a to 7f). Therefore, in the modified example 1, 12 electric field strength meters (34a1,34a2, ..., 34f1,34f2) are provided in the internal space (S) of the container (5). Each electric field strength meter (34a1,34a2, ..., 34f1,34f2) is configured to measure the electric field strength at the installation location and transmit the measured value to the electric field controller (35).

In the first modification, the electric field controller (35) controls each of the items of the luggage (6) loaded in the first to sixth control areas (7a to 7f) input in advance, the load capacity, the loading position, and the like. Set the target range of the electric field strength of each area (7a to 7f) so that the measured value of the electric field strength meter (34a to 34f) corresponding to each control area (7a to 7f) is within the target range. , It is configured to increase or decrease the voltage applied to each electrode pair (31a to 31f, 32a to 32f).

Specifically, the target range of the electric field strength in the first control area (7a) is 2 kV to 4 kV, and the measured value of the electric field strength meter (34a1) provided in the first control area (7a) is 3 kV. When the measured value of the total (34a2) is 3.5 kV, that is, the measured values of the two electric field strength meters (34a1, 34a2) provided in the first control area (7a) are both within the target range. In this case, the electric field controller (35) maintains the voltage applied between the first electrode pairs (31a, 32a) that generate an electric field in the first control area (7a) without increasing or decreasing. When at least one of the measured values of the two electric field strength meters (34a1,34a2) provided in the first control area (7a) is lower than the target range, the electric field controller (35) is the first. The voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the control area (7a) is increased by one step. On the other hand, when at least one of the measured values of the two electric field strength meters (34a1,34a2) provided in the first control area (7a) is higher than the target range, the electric field controller (35) determines. The voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a) is lowered by one step.

As described above, also in the modified example 1, the electric field controller (35) has the first to sixth electrode pairs (31a) according to the state of the electric field generated in the first to sixth control areas (7a to 7f). ~ 31f, 32a ~ 32f) Increase or decrease the voltage applied. Further, in the first modification, the electric field controller (35) sets the electric field strength at each location within the target range according to the electric field strength at a plurality of locations in the first to sixth control areas (7a to 7f). The voltage applied to the first to sixth electrode pairs (31a to 31f, 32a to 32f) is increased or decreased so as to be. By controlling the electric field controller (35) in this way, each part of the internal space (S) of the container (5) is maintained at an electric field strength suitable for maintaining the freshness of the luggage (6) loaded in that part. It will be.

In addition, in this modification 1, for example, when there is a place where the luggage (6) is not loaded, the electric field controller (35) is provided at the place by inputting the place to the electric field controller (35) in advance. The measured value of the electric field strength meter may be ignored.

For example, when the load (6) is not loaded at the place where the electric field strength meter (34f1) is provided, the user inputs the position information to the electric field controller (35). Based on this position information, the electric field controller (35) adjusts the electric field strength in the sixth control area (7f), ignoring the measured value of the electric field strength meter (34f1). Specifically, the electric field controller (35) increases or decreases the voltage applied between the sixth electrode pairs (31f, 32f) so that only the measured value of the electric field strength meter (34f2) is within the target range.

Since the electric field strength does not easily increase in places where luggage (6) is not loaded, the voltage applied between the electrode pairs (31a to 31f, 32a to 32f) that generate an electric field in the control area (7a to 7f) is applied. However, according to the above control, the applied voltage is adjusted only according to the electric field strength at the place where the load (6) is loaded, so that the voltage is not increased unnecessarily. Therefore, the power consumption can be reduced.

− Modification of Embodiment 1 2-
In the second embodiment of the first embodiment, in the first embodiment, a plurality of electric field strength meters (34a1,34a2, ..., 34f1,34f2) are provided in the luggage (6) of each control area (7a to 7f), and the electric field controller ( The control according to 35) was changed.

As shown in FIG. 6, in the modified example 2, two of the plurality of loads (6) loaded in each control area (7a to 7f) have an electric field strength meter (34a1,34a2, ..., 34f1,34f2). Is installed. Therefore, in the second modification, 12 electric field strength meters (34a1,34a2, ..., 34f1,34f2) are provided in the internal space (S) of the container (5). Each electric field strength meter (34a1,34a2, ..., 34f1,34f2) is configured to measure the electric field strength at the installation location and transmit the measured value to the electric field controller (35).

In the second modification, the electric field controller (35) controls each of the items of the luggage (6) loaded in the first to sixth control areas (7a to 7f) input in advance, the load capacity, the loading position, and the like. Set the target range of the electric field strength of each area (7a to 7f) so that the measured value of the electric field strength meter (34a to 34f) corresponding to each control area (7a to 7f) is within the target range. , It is configured to increase or decrease the voltage applied to each electrode pair (31a to 31f, 32a to 32f).

Specifically, the target range of the electric field strength in the first control area (7a) is 2 kV to 4 kV, and the measured value of the electric field strength meter (34a1) attached to the luggage (6) in the first control area (7a). Is 3 kV and the measured value of the electric field strength meter (34a2) is 3.5 kV, that is, the measurement of the two electric field strength meters (34a1, 34a2) attached to the luggage (6) in the first control area (7a). When both values are within the target range, the electric field controller (35) does not increase or decrease the voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a). maintain. If at least one of the measured values of the two electric field strength meters (34a1,34a2) attached to the luggage (6) of the first control area (7a) is lower than the target range, the electric field controller (35) ) Raises the voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a) by one step. On the other hand, if at least one of the measured values of the two electric field strength meters (34a1,34a2) attached to the luggage (6) in the first control area (7a) is higher than the target range, the electric field controller In (35), the voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a) is lowered by one step.

As described above, also in the modified example 2, the electric field controller (35) has the first to sixth electrode pairs (31a) according to the state of the electric field generated in the first to sixth control areas (7a to 7f). ~ 31f, 32a ~ 32f) Increase or decrease the voltage applied. Further, in the second modification, the electric field controller (35) has each load (6) according to the electric field strength acting on the load (6) provided at a plurality of locations in the first to sixth control areas (7a to 7f). The voltage applied to the first to sixth electrode pairs (31a to 31f, 32a to 32f) is increased or decreased so that the electric field strength acting on) is within the respective target ranges. By controlling the electric field controller (35) in this way, the electric field strength suitable for maintaining the freshness of the luggage (6) loaded in each place of the internal space (S) of the container (5) can be maintained.

In the second modification, the number of electric field strength meters attached to the luggage (6) loaded in the first to sixth control areas (7a to 7f) is not limited to two. An electric field strength meter may be attached to only one luggage (6) in each control area (7a to 7f), and the applied voltage may be controlled so that the measured value of the electric field strength meter is within the target range. An electric field strength meter may be attached to the luggage (6) to control the applied voltage so that the measured values of three or more electric field strength meters are within the target range. Further, the number of electric field strength meters provided may be changed for each control area (7a to 7f).

<< Embodiment 2 >>
The second embodiment is a modification of the configuration of the electric field generator (30) of the first embodiment.

As shown in FIG. 7, in the second embodiment, the electric field generator (30) includes a temperature sensor (37) and a humidity sensor (38) instead of the plurality of electric field strength meters (34a to 34f). There is. That is, in the second embodiment, the electric field generator (30) includes a plurality of electrodes (31a to 31f, 32a to 32f), a voltage application device (33), a temperature sensor (37), and a humidity sensor (38). , Equipped with an electric field controller (35). The plurality of electrodes (31a to 31f, 32a to 32f) and the voltage applying device (33) are configured in the same manner as in the first embodiment.

The temperature sensor (37) and the humidity sensor (38) are provided in the internal space (S). The temperature sensor (37) is configured to measure the temperature of the air inside the refrigerator and transmit the measured value to the electric field controller (35). The humidity sensor (38) is configured to measure the humidity (relative humidity) of the air inside the refrigerator and transmit the measured value to the electric field controller (35).

In the second embodiment, the electric field controller (35) uses the load state of the load (6) such as the item, load capacity, and load position of the load (6) to be loaded in each control area (7a to 7f), and the air inside the refrigerator. The relationship between the state of the air inside the refrigerator such as temperature and humidity and the strength of the electric field (electric field strength) generated in each control area (7a to 7f) is obtained by conducting a test in advance and stored. Further, as in the first embodiment, the electric field controller (35) determines the items, load capacity, loading position, etc. of the load (6) loaded in the first to sixth control areas (7a to 7f) input in advance. From the information, the target range of the electric field strength of each control area (7a to 7f) is set and stored. Then, in the second embodiment, the electric field controller (35) has the temperature and humidity of the air inside the refrigerator measured by the temperature sensor (37) and the humidity sensor (38), and each control area (7a to 7f) given in advance. The current electric field strength of each control area (7a to 7f) is estimated based on the information of the luggage (6) such as the item, loading capacity, and loading position of the luggage (6) to be loaded on the vehicle, and the estimated values are each. The voltage applied to each electrode pair (31a to 31f, 32a to 32f) is increased or decreased so that the value is within the target range.

For example, if the target range of electric field strength in the first control area (7a) is 2 kV to 4 kV and the current estimated value of the electric field strength in the first control area (7a) is 3 kV, the electric field controller (35) The voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a) is maintained without increasing or decreasing. When the current estimated electric field strength of the first control area (7a) is 1 kV, the electric field controller (35) is placed between the first electrode pairs (31a, 32a) that generate an electric field in the first control area (7a). Increase the applied voltage by one step. On the other hand, when the current estimated value of the electric field strength in the first control area (7a) is 5 kV, the electric field controller (35) lowers the voltage applied between the first electrode pairs (31a, 32a) by one step.

As described above, the electric field controller (35) has the first to sixth electrode pairs (31a to 31f, 32a to 32f) according to the state of the electric field generated in the first to sixth control areas (7a to 7f). ) Is increased or decreased. In the second embodiment, the electric field controller (35) is in each control area (7a to 7f) according to the estimated value of the electric field strength (electric field strength) generated in the first to sixth control areas (7a to 7f). ), The voltage applied to the first to sixth electrode pairs (31a to 31f, 32a to 32f) is increased or decreased so that the estimated value of the electric field strength is within the respective target ranges. By controlling the electric field controller (35) in this way, each part of the internal space (S) of the container (5) is maintained at an electric field strength suitable for maintaining the freshness of the luggage (6) loaded in that part. It will be.

-Effect of Embodiment 2-
Similarly to the first embodiment, the electric field generator (30) of the second embodiment also has the container (5) by increasing or decreasing the applied voltage according to the state of the electric field generated in the container (5). It is possible to generate an electric field suitable for maintaining the freshness of the loaded luggage (6).

Further, in the electric field generator (30) of the second embodiment, in the above configuration, the electric field controller (35) is loaded in the container (5) given in advance with the temperature and humidity of the air inside the container (5). Based on the information of the baggage (6), the electric field strength (electric field strength) of each control area (7a to 7f) of the container (5) is estimated so that the estimated value is within the above desired range. , The voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased.

In the electric field generator (30) of the second embodiment, even if the temperature or humidity inside the container (5) changes, each part of the space (S) inside the container (5) is loaded in that place. The electric field strength can be adjusted to be suitable for maintaining the freshness of the loaded luggage (6).

− Modification of Embodiment 2 −
In the second embodiment, the electric field generator (30) includes both a temperature sensor (37) and a humidity sensor (38), and the electric field controller (35) uses the temperature sensor (37) and the humidity sensor (38). Based on the measured temperature and humidity of the refrigerator air and the information of the luggage (6) loaded in each control area (7a to 7f) given in advance, the current electric field of each control area (7a to 7f). The intensity was estimated, and the voltage applied to each electrode pair (31a to 31f, 32a to 32f) was increased or decreased so that the estimated values were within the target range. However, the electric field generator (30) includes one of the temperature sensor (37) and the humidity sensor (38), and the electric field controller (35) is measured by one of the temperature sensor (37) and the humidity sensor (38). The current electric field strength of each control area (7a to 7f) is estimated based on the temperature or humidity of the air inside the refrigerator and the information of the luggage (6) loaded in each control area (7a to 7f) given in advance. However, the voltage applied to each electrode pair (31a to 31f, 32a to 32f) may be increased or decreased so that the estimated value is within the target range.

<< Embodiment 3 >>
The third embodiment is a modification of the configuration of the electric field generator (30) of the first embodiment.

As shown in FIG. 8, in the third embodiment, the electric field generator (30) is provided with a plurality of freshness index sensors (39a to 39f) instead of the plurality of electric field strength meters (34a to 34f). That is, in the third embodiment, the electric field generator (30) includes a plurality of electrodes (31a to 31f, 32a to 32f), a voltage application device (33), a plurality of freshness index sensors (39a to 39f), and an electric field. It is equipped with a controller (35). The plurality of electrodes (31a to 31f, 32a to 32f) and the voltage applying device (33) are configured in the same manner as in the first embodiment.

A plurality of freshness index sensors (39a to 39f) are attached to one of a plurality of packages (6) loaded in each control area (7a to 7f). Therefore, in the third embodiment, six electric field strength meter freshness index sensors (39a to 39f) are provided in the internal space (S) of the container (5). For example, each freshness index sensor (39a to 39f) irradiates the attached object with near-infrared rays and measures the sugar content and water content of the object based on the wavelength of the near-infrared rays absorbed by the object. A near-infrared analyzer can be used. The freshness index is not limited to the sugar content and the water content, and the amino acid value, the inosinic acid value, the K value, and the like may be used as the freshness index. Each freshness index sensor (39a to 39f) is configured to measure the freshness index of the package (6) and transmit the measured value to the electric field controller (35).

In the third embodiment, the electric field controller (35) stores the freshness control plan information of the luggage (6) loaded in each control area (7a to 7f). For example, the freshness control plan information is controlled to maintain the freshness level of the package (6) at a high level until 3 days before arriving at the destination after the start of transportation, and the number of remaining days until the arrival date is 3 days. Then, it is the information of the control plan such as performing the aging promotion control for aging the luggage (6) to the desired aging degree. The freshness control plan information is not limited to this, and after the start of transportation, first, the aging promotion control for aging the baggage (6) is performed, and when the predetermined aging degree is reached, the freshness maintenance control for maintaining the freshness level at the aging degree is performed. It may be changed to.

Further, in the third embodiment, the electric field controller (35) estimates the freshness level and maturity of the luggage (6) in each control area (7a to 7f) from the measured values of the freshness index sensors (39a to 39f). It is configured as follows. Then, the electric field controller (35) uses the estimated values of the current freshness level and maturity of the luggage (6) in each control area (7a to 7f) and the luggage in each control area (7a to 7f) in the freshness control plan. It is configured to increase or decrease the voltage applied to each electrode pair (31a to 31f, 32a to 32f) so that the estimated value becomes the target value by comparing with the target value of the freshness level or maturity of (6). ing.

For example, during the freshness maintenance control, if the estimated freshness level of the luggage (6) in the current first control area (7a) is lower than the target value, the electric field controller (35) is prevented from further lowering the freshness level. ) Raises the voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a) by one step. On the other hand, when the estimated freshness level of the luggage (6) in the current first control area (7a) is equal to or higher than the target value, the first electrode pair (31a, 32a) that generates an electric field in the first control area (7a). ) Maintain the applied voltage without increasing or decreasing.

On the other hand, during the aging promotion control, when the estimated value of the aging degree of the luggage (6) in the current first control area (7a) is lower than the target value, the electric field controller (35) is forced to proceed with aging. 1 The voltage applied between the first electrode pair (31a, 32a) that generates an electric field in the control area (7a) is lowered by one step. On the other hand, when the estimated maturity of the luggage (6) in the current first control area (7a) is equal to or higher than the target value, an electric field is generated in the first control area (7a) so that the maturation does not proceed any further. The voltage applied between the first electrode pair (31a, 32a) is increased by one step.

As described above, the electric field controller (35) has the first to sixth electrode pairs (31a to 31f) according to the state of the load (6) loaded in the first to sixth control areas (7a to 7f). , 32a to 32f) Increase or decrease the voltage applied. In the third embodiment, the electric field controller (35) targets the estimated value according to the estimated value of the freshness level or the maturity of the luggage (6) loaded in the first to sixth control areas (7a to 7f). The voltage applied to the first to sixth electrode pairs (31a to 31f, 32a to 32f) is increased or decreased so as to reach a value. By controlling the electric field controller (35) in this way, each part of the internal space (S) of the container (5) has an electric field strength suitable for maintaining the freshness and promoting aging of the luggage (6) loaded in that part. It will be controlled.

-Effect of Embodiment 3-
The electric field generator (30) of the third embodiment includes electrodes (31a to 31f, 32a to 32f) and a voltage application device (33) that applies a voltage to the electrodes (31a to 31f, 32a to 32f). , An electric field is generated in the internal space (S) of the container (5). The electric field generator (30) includes an electric field controller (35) that controls the voltage applied to the electrodes (31a to 31f, 32a to 32f), and the electric field controller (35) is loaded in the container (5). The voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased according to the state of the luggage (6).

In the electric field generator (30) of the third embodiment, the load (6) loaded in the container (5) is increased or decreased according to the state of the load (6) loaded in the container (5). It is possible to generate an electric field suitable for maintaining the freshness of.

Further, in the electric field generator (30) of the third embodiment, in the above configuration, the electric field controller (35) has the electrodes (31a to 31f) according to the freshness of the load (6) loaded in the container (5). , 32a to 32f) to increase or decrease the voltage applied.

In the electric field generator (30) of the third embodiment, the voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased according to the freshness of the load (6) loaded in the container (5). , An electric field suitable for the maturity of the luggage (6) can be generated.

− Modification 1 of Embodiment 3
In the first modification of the third embodiment, in the third embodiment, one electric field strength meter (34a to 34f) is provided in each control area (7a to 7f), and the control by the electric field controller (35) is changed. .. The six electric field strength meters (34a to 34f) are provided in the internal space (S) as in the first embodiment, and are similarly configured.

In the first modification, in the freshness maintenance control, the electric field controller (35) has the items, the loading capacity, the loading position, etc. of the luggage (6) loaded in the first to sixth control areas (7a to 7f) input in advance. The target range of the electric field strength of each control area (7a to 7f) is set from the information of, and the measured value of the electric field strength meter (34a to 34f) corresponding to each control area (7a to 7f) is within the target range. It is configured to increase or decrease the voltage applied to each electrode pair (31a to 31f, 32a to 32f) so as to have a value. The specific control is the same as that of the first embodiment.

Further, in the first modification, in the aging promotion control, the electric field controller (35) is a load (7a to 7f) in each control area (7a to 7f) based on the measured values of the freshness index sensors (39a to 39f) as in the third embodiment. It is configured to estimate the maturity of 6) and increase or decrease the target range of electric field strength in each control area (7a to 7f) according to this estimated value.

Specifically, the electric field controller (35) uses the first control area to proceed with aging when the estimated maturity of the luggage (6) in the current first control area (7a) is lower than the target value. Decrease the target range of the electric field strength in (7a) by one step. On the other hand, when the estimated value of the maturity of the luggage (6) in the current first control area (7a) is equal to or higher than the target value, the electric field strength of the first control area (7a) is adjusted so that the maturation does not proceed further. Raise the target range by one level.

Even in the above-described modification 1, the same effect as that of the third embodiment can be obtained.

<< Other Embodiments >>
In the electric field generator (30) of each of the above embodiments and modifications, a voltmeter is provided instead of the electric field strength meter, and each electrode pair (31a to 31f, 32a to) so that the measured voltage is within the target range. The voltage applied to 32f) may be increased or decreased.

Further, the configuration of the container refrigerating apparatus (10) in each of the above embodiments and modifications is not limited to the above, and may be changed to other configurations.

Although the embodiments and modifications have been described above, it will be understood that various modifications of the forms and details are possible without departing from the purpose and scope of the claims. In addition, the above embodiments and modifications may be appropriately combined or replaced as long as they do not impair the functions of the present disclosure.

As described above, the present disclosure is useful for an electric field generator and a cold storage equipped with the electric field generator.

5 Container (storage)
6 Luggage (containment)
10 Container refrigeration equipment (refrigeration equipment)
30 Electric field generator
31a-31f electrodes
33 Voltage application device
34a-34f Electric field strength meter (measuring equipment)
35 Electric field controller (control unit)
37 Temperature sensor
38 Humidity sensor

The voltage application device (33) is housed in the storage space (S1) outside the refrigerator. Although not shown, the voltage application device (33) has a plurality of power supply circuits (36) connected to each electrode pair (31a to 31f, 32a to 32f). Although not shown, each power supply circuit (36) has an AC power supply device, a rectifier circuit, an inverter circuit, and a booster, and applies a voltage between each electrode pair (31a to 31f, 32a to 32f). The voltage to be applied is variably configured as well as being applied . Each power supply circuit (36) is configured to be able to apply a voltage of 0.5 kV to 10 kV between the corresponding electrode pairs (31a to 31f, 32a to 32f). The voltage applied between the first to sixth electrode pairs (31a to 31f, 32a to 32f) is controlled by the electric field controller (35).

Claims (6)

An electric field is provided in the food storage (5) by providing an electrode (31a to 31f, 32a to 32f) and a voltage applying device (33) for applying a voltage to the electrodes (31a to 31f, 32a to 32f). It is an electric field generator that generates
A control unit (35) for controlling the voltage applied to the electrodes (31a to 31f, 32a to 32f) is provided.
The control unit (35) has the electrodes (31a to 31f,) depending on the state of the electric field generated in the storage (5) or the state of the container (6) housed in the storage (5). An electric field generator characterized by increasing or decreasing the voltage applied to 32a to 32f). In claim 1,
The control unit (35) has the electrodes (31a to 31f,) so that the strength of the electric field generated in the storage (5) or the voltage in the storage (5) is within a desired range. An electric field generator characterized by increasing or decreasing the voltage applied to 32a to 32f). In claim 2,
It is provided at least one place in the storage (5) and equipped with measuring devices (34a to 34f) for measuring the strength or voltage of the electric field.
The control unit (35) increases or decreases the voltage applied to the electrodes (31a to 31f, 32a to 32f) so that the values measured by the measuring instruments (34a to 34f) are within the desired range. A characteristic electric field generator. In claim 2,
The control unit (35) is based on at least one of the temperature and humidity of the air inside the storage (5) and the information of the contents (6) stored in the storage (5) given in advance. The strength or voltage of the electric field at at least one place in the storage (5) is estimated, and the estimated value is applied to the electrodes (31a to 31f, 32a to 32f) so as to be in the desired range. An electric field generator characterized by increasing or decreasing the voltage. In claim 1,
The control unit (35) is characterized in that the voltage applied to the electrodes (31a to 31f, 32a to 32f) is increased or decreased according to the freshness of the container (6) housed in the storage (5). Electric field generator. It is a cold storage equipped with a food storage (5) and a freezing device (10) for cooling the inside of the storage (5).
A cold storage provided with the electric field generator (30) according to any one of claims 1 to 5.

Images