JP2021165621A - Reefer container - Google Patents

Abstract

To provide a container device which can suppress emission of an exhaust gas of an internal combustion engine to a low level and thus is preferable for long-distance transport.SOLUTION: A reefer container according to the invention includes: a container body; a cooling device 5 which cools an interior of the container body; a plug 20 with which an exterior power source 27 is connected; a lithium ion battery unit 6; a power generation device 7 which is driven by an engine 21; and a power source switch device 25 which selects one of the external power source 27, the lithium ion battery unit 6, and the power generation device 7 as a power source for operating the cooling device 5. The power source switch device 25 selects the external power source 27 as the power source for operating the cooling device 5 when the external power source 27 is connected to the plug 20.SELECTED DRAWING: Figure 2

Description

The present invention relates to a reefer container for freezing and refrigerating, which can transport cargo such as fresh food while controlling the temperature.

In recent years, there has been a strong tendency for air transportation to be modally shifted to marine transportation with low transportation costs, and especially for marine transportation of fresh food, fresh flowers, wine, chemicals, precision machinery that requires strict temperature control, etc. A container with equipment to keep it at a constant temperature) is essential. As an apparatus including such a reefer container, for example, the cold air generation system described in Patent Document 1 is known.

As shown in FIG. 6, this cold air generation system operates by a fuel tank 110 that houses fuel, an engine 120 that is operated by fuel sent from the fuel tank 110, and power supplied from the engine 120 to generate electricity. Electricity is supplied to the cold air generator 140 from either the generator 130, the cold air generator 140 that generates cold air, the battery 150 that can charge the electricity supplied from the generator 130, or the generator 130 or the battery 150. A cold air generation system 100 including a control device 160 is provided inside the iron box 101, and even if the operation of the generator 130 is not allowed, the battery 150 supplies electricity to the cold air generator 140, and the cold air generator By continuing the operation of the 140, it is possible to keep the article 171 requiring refrigeration in the refrigerating box 170 at a low temperature by the cold air generated from the cold air generator 140 regardless of whether the generator 130 is operating or not. ..

Japanese Unexamined Patent Publication No. 2017-198377

By the way, in the cold air generation system described in Patent Document 1, the cooling device (cold air generator) is auxiliary operated by a battery when traveling in a tunnel or the like where power generation by an internal combustion engine (engine) cannot be generated in freight transportation, but other than that. The cooling system is mainly operated by a power generator (generator) driven by an internal combustion engine, and especially when freight is transported over a long distance, a large amount of exhaust gas from the internal combustion engine such as carbon dioxide is emitted over a wide area. As a result, there was a problem that it was unfavorable for the environment while there was concern about global warming. That is, when the cooling device is intentionally and auxiliaryly operated by a battery, there are _{effects such as reduction of fuel consumption by the internal combustion engine for the power generation device, emission gas screen by CO 2} reduction, noise reduction, etc., but other than that. In this case, the above-mentioned effect is not obtained because the electric power generated by the power generation device is only used through the battery. In order to obtain this effect, it is necessary to store and utilize clean power from a power line that has a greater _{CO 2 reduction effect than a small power generator for containers.}

The present invention has been made in view of the above circumstances, and provides a reefer container suitable for land transportation, which realizes _{CO 2} reduction by reducing the exhaust gas of an internal combustion engine that supplies power to a cooling device. It is an issue.

In order to solve the above problems, the reefer container according to the present invention is provided by a container body, a cooling device for cooling the inside of the container body, an external power supply connection portion to which an external power source is connected, a storage battery, and an internal combustion engine. A power generation device to be driven and a power supply selection unit for selecting any of the external power source, the storage battery, and the power generation device as a power source for operating the cooling device are provided, and the power supply selection unit is connected to the external power supply connection unit. When the external power source is connected, the external power source is selected as the power source for operating the cooling device. Here, the cooling device may have a function of raising the temperature in a cold region, and the internal combustion engine may be provided in the container device itself or in a vehicle such as a truck that transports the container device. good.

The storage battery may be electrically connected only to the power supply selection unit, and the power supply selection unit may be capable of cutting off the connection between the storage battery and the cooling device, the external power supply connection unit, and the power generation device.

The power supply selection unit operates the cooling device when the external power supply is not connected to the external power supply connection unit and the SOC (State of Charge) of the storage battery is equal to or less than the first reference value. The power generation device is selected as the power source to be operated (as a result, for example, the power generation device operates to supply electric power to the cooling device and at the same time charge the storage battery), and the external power source is connected to the external power supply connection portion. When the storage battery is not connected and the SOC of the storage battery is equal to or higher than the second reference value, the storage battery may be selected as the power source for operating the cooling device (for example, the second reference value is the first reference value). If the SOC is greater than or equal to the first reference value, charging is started below the first reference value, and when charging progresses and reaches the second reference value, the power generation device is stopped and the cooling device is used. Is supplied with power only from the storage battery.) The SOC can be obtained from a discharge curve set by a storage battery manufacturer or the like according to, for example, the terms and measurement methods specified in JIS C 8711: 2013, and the first reference value is 64%. Is desirable.

That is, the reefer container according to the present invention mainly operates the cooling device by the electric power of the storage battery supplied from the external power source such as a power line emitting _{low CO 2, and the electric power from the power generation device.} Aims to be used proactively when the operating power is insufficient by the time it reaches the external power source. _{Therefore, CO 2} emission is suppressed by limiting the charging from the power generation device to less than half of the effective power of the storage battery. That is, in order to prevent deterioration of the charge / discharge cycle of the storage battery, half of the effective power (see FIG. 4) of the storage battery when the SOC is cut by 10% at the charge upper limit and 20% at the discharge lower limit, which are usually adopted. for a SOC55%, taking into account the 10% by storage deterioration which proceeds simultaneously with the cycle deterioration of the battery is less than SOC65%, the in the first reference value (Fig. 4, the charge start voltage V _S corresponding ) Was set to 64%. If considering deterioration due to fine cycle was repeated for No charge and discharge, the (in FIG. 4, the charge stop voltage V _E corresponding.) The second reference value closer to the first reference value, said first _{The CO 2} reduction effect is greater when the reference value of is lower than 64%.

Further, in the reefer container according to the present invention, the cold insulation time calculation for calculating the cold insulation time capable of holding the inside of the container body in a predetermined temperature range based on the remaining charge of the storage battery and the fuel remaining amount of the internal combustion engine. The means and the notification means for displaying or transmitting the cold insulation time to the outside may be provided, or the temperature or humidity inside the container body, the temperature or humidity of the outside air, the operating status or power consumption of the cooling device. , The operating status or power consumption of the power generation device, the current, voltage, SOC or remaining charge of the storage battery, or the fuel remaining amount of the internal combustion engine may be provided with a transmission means for transmitting data to the outside.

Further, a conductor plate insulated from the container body may be installed inside the container body as an electrode to which a voltage is applied.

According to the present invention, it is possible to provide a reefer container suitable for land transportation, which realizes _{CO 2} reduction by reducing the exhaust gas of the internal combustion engine that supplies power to the cooling device.

It is explanatory drawing which shows the transportation system provided with the reefer container which concerns on embodiment of this invention. It is a block diagram which shows the structure of the transportation system of FIG. It is explanatory drawing which shows the example of the discharge curve of a storage battery. It is explanatory drawing which shows the change of the charge state (charge rate) of the lithium ion battery unit of FIG. It is explanatory drawing which shows the example which provided the electrode composed of a pair of conductor plates in the transport system of FIG. It is explanatory drawing which shows the conventional container apparatus.

Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the transportation system 1 includes a reefer container 2 according to an embodiment of the present invention, and a server 3 that exchanges information with the reefer container 2 by communication using a communication network such as wireless communication or the Internet. To be equipped.

The reefer container 2 includes a container body 4, a cooling device 5, a lithium ion battery unit 6, a power generation device 7, a control box 8, a display 9, and an operation unit 10.

The container body 4 has a rectangular parallelepiped shape with a length (longitudinal direction) of 12 feet, 20 feet or 40 feet, a width of about 8 feet, and a height of about 9 feet. Surrounded by heat-insulating side walls 12, 12, end walls 13, doors 14, 14, roof 15 and floor 16, mainly fresh food, fresh flowers, wine, chemicals, precision machinery and other cargo that requires temperature control. Stacked. The container body 4 is provided with a temperature sensor 17 for measuring the temperature inside and outside the luggage compartment 11 (inside and outside air of the luggage compartment 11) and a GNSS sensor 18 such as a GPS sensor for acquiring the position information of the reefer container 2. ing.

The cooling device 5 is provided on the side of the end wall 13 of the container body 4, is operated by the power generation of the lithium ion battery unit 6 or the power generation device 7 (plug-in hybrid method), and enters the luggage compartment 11 from the lower part of the end wall 13. Cold air is sent out, and the cold air circulates from the floor 16 through the side walls 12, 12, the doors 14, 14, and the roof 15 to circulate the luggage compartment 11 in a predetermined temperature range δT (for example, 25 to -15 ° C.). Keep cold in the temperature range of.

The lithium-ion battery unit 6 is a unitized lithium-ion battery, and a plurality of lithium-ion battery units 6 are provided under the floor of the luggage compartment 11 (below the floor 16). It is desirable that the total battery capacity (nominal capacity, rated capacity: JIS C8711: 2013) of the lithium ion battery unit 6 is 10 kWh or more. The reefer container 2 is provided with a plug 20 into which a charging cable 19 is inserted in a container yard or the like in a port, and the lithium ion battery unit 6 is charged by power supply from the charging cable 19 or power generation by a power generation device 7.

As shown in FIG. 2, the power generation device 7 is driven by a diesel engine 21 having an output of about several kW to 20 kW, and is detachably provided on the end wall 13 side of the container body 4 like the cooling device 5. There is. The engine 21 and its fuel tank 22 may be provided in the reefer container 2 or may be provided outside the reefer container 2, for example, in a vehicle such as a truck that transports the reefer container 2. The capacity of the fuel tank 22 is 50 L (liter) or less, and the amount of electric power that the power generation device 7 can supply to the fuel tank 22 without refueling is 20 times or less the battery capacity of the lithium ion battery unit 6. Desirably, when the battery capacity of the lithium ion battery unit 6 is 10 kWh, the amount of power that can be supplied by the power generation device 7 is 240 kWh or less. Non-methane hydrocarbons and nitride oxides contained in the exhaust gas of the engine 21 are 7.5 g / kWh or less, and particulate matter is 0.4 g / kWh or less. It complies with "Technical Standards for Designation of Construction Machinery" (2006 Ministry of Land, Infrastructure, Transport and Tourism Notification No. 349) and the 4th Emission Regulations (Tier 4 Regulations) of the US Environmental Protection Agency.

The control box 8 includes a control unit 23 and a communication unit 24. The control unit 23 switches 25a, 25b, 25c of the power switching device 25 based on the remaining charge of the lithium-ion battery unit 6, the remaining fuel of the engine 21, the measured temperature of the temperature sensor 17, and the connection status of the plug 20. It controls switching, operation of the cooling device 5, and charging of the lithium-ion battery unit 6. The switch 25a selects the power supply to the circuit line 26, specifically, the terminal P on the external power supply 27 side, the terminal G on the power generation device 7 side, and the terminal N in the neutral insulation state. The switch 25b is a circuit. Selection of disconnection with line 26, specifically, it is connected when power is supplied from the lithium ion battery unit 6 to the cooling device 5 or when the cooling device 5 is in operation, and the switch 25c selects disconnection with circuit line 26. Specifically, it is connected when the lithium ion battery unit 6 is charged or when the lithium ion battery unit 6 supplies power to the cooling device 5. The power switching device 25 makes it possible to use different power sources, in particular, to use a large amount of electric power from the lithium ion battery unit 6 and the external power source 27, and to control by a program or artificial intelligence that suppresses power generation by the engine 21 as much as possible. In addition, the power switching device 25 enables proper control of charging / discharging of the lithium-ion battery unit 6, and the lithium-ion battery unit 6 is electrically connected only to the power switching device 25 while switching the power supply. Since the device 25 can cut off the connection between the lithium ion battery unit 6 and the cooling device 5, the plug 20, and the power generation device 7, risk management such as electric leakage when the lithium ion battery unit 6 is not used, such as during sea transportation. Can also contribute to.

Further, the control unit 23 determines the remaining charge of the lithium ion battery unit 6 and the remaining fuel of the engine 21 (if the engine 21 is provided in the transport vehicle of the reefer container 2, the fuel remains from the transport vehicle or the like). Based on the amount (acquiring the amount) and the measured temperature of the temperature sensor 17 (the temperature of the luggage compartment 11 and the outside air), the luggage compartment 11 can be held in the temperature range δT (the temperature range δT without raising the temperature of the luggage compartment 11). The cold insulation time t is calculated and displayed on the display 9 so that the operator of the reefer container 2 can see it, and the cold insulation time t and the position information of the reefer container 2 obtained by the GNSS sensor 18 are obtained. , The remaining charge of the lithium ion battery unit 6 and the remaining fuel of the engine 21 are transmitted to the server 3 by the communication unit 24 at regular intervals (for example, every 15 minutes).

The server 3 includes a navigation unit 28 capable of calculating the transportation route of the reefer container 2, the cold storage time t from the control box 8, the position information of the reefer container 2, the remaining charge of the lithium ion battery unit 6, and the fuel of the engine 21. When the remaining amount is received, the navigation unit 28 determines the transportation route of the reefer container 2 for arriving at the destination within the cold insulation time t based on the cold insulation time t, the position information, the remaining charge amount, and the remaining fuel amount. Alternatively, if it is difficult to reach the destination within the cold storage time t, a place such as a charging facility where the reefer container 2 should stop by for charging the lithium ion battery unit 6 or refueling (refueling) the engine 21. Ask for. The cold storage time t and the location of the transportation route or charging facility determined by the navigation unit 28 are the transporters of the reefer container 2 (for example, when the reefer container 2 is transported by land by truck, the operation of the truck). Person) will be notified by e-mail or any other means.

Explaining the control by the control unit 23, the control unit 23 continuously monitors the battery output voltage indicating the remaining charge of the lithium ion battery unit 6 by the battery fuel gauge IC (not shown), and the inside of the fuel tank 22. The remaining fuel level is continuously monitored by a float (not shown). The discharge curve of the battery according to JIS C8711: 2013 is shown as shown in FIG. 3, and the voltage corresponding to the SOC can be obtained from this discharge curve. In FIG. 3, the corresponding voltage is about 4.15 V when the SOC is 100%, and the corresponding voltage is about 3.8 V when the SOC is 60%. Then, the control unit 23 operates the cooling device 5 by using the lithium ion battery unit 6 when both the remaining charge and the remaining fuel are remaining. That is, when the reefer container 2 departs toward the destination with the lithium ion battery unit 6 fully charged, the control unit 23 brings the switch 25a of the power switching device 25 into contact with the terminal N to generate the power generation device 7. The cooling device 5 and the lithium ion battery unit 6 are connected by contacting the switch 25b with the terminal C and the switch 25c with the terminal B to turn them on, and the lithium ion battery unit 6 connects the cooling device 5 with the lithium ion battery unit 6. Operate (at this time, as shown in FIG. 4, the voltage (corresponding to SOC) of the lithium ion battery unit 6 drops from _{V 1).}

Further, the control unit 23 continuously monitors the temperature of the luggage compartment 11 by the temperature sensor 17, and when the temperature drops to a predetermined temperature T (for example, −25 ° C.) in the temperature range δT, the switch 25b is terminal C. by the separating is allowed by off from, separately from the cooling device 5 a lithium-ion battery unit 6, when stopping the cooling device 5 (this, the voltage of the lithium-ion battery unit 6 is constant decreases to V _2. ). The luggage compartment 11 has high heat insulating properties, and is maintained in the temperature range δT for a while even when the cooling device 5 is stopped, and then gradually raises the temperature. However, when the control unit 23 detects the temperature rise by the temperature sensor 17. , The switch 25b is brought into contact with the terminal C to turn it on, the cooling device 5 and the lithium ion battery unit 6 are connected, and the cooling device 5 is operated by the lithium ion battery unit 6 (at this time, the voltage of the lithium ion battery unit 6). Decreases from V _2.). When the control unit built in the cooling device 5 controls the stop / operation of the cooling device 5, the switch 25b may always be in contact with the terminal C to be turned on.

When the luggage compartment 11 is maintained at a low temperature by the operation of the cooling device 5, frost is generated in the luggage compartment 11. Therefore, the control unit 23 stops the cooling device 5 when the luggage compartment 11 cools down to the temperature T again, and the luggage compartment 11 is operated. performs defrosting (this time, the voltage of the lithium-ion battery unit 6 is constant at V _3.). Defrosting is performed every several hours to ten and several hours. For example, if the temperature T is −25 ° C., the temperature of the luggage compartment 11 is raised to −18 to −17 ° C. for about 10 minutes. When the defrosting is completed, the control unit 23 operates the cooling device 5 again by the lithium ion battery unit 6 (at this time, the voltage of the lithium ion battery unit 6 drops from _{V 3).}

SOC of the lithium-ion battery unit 6 becomes the start charging the charging rate of 64% (first reference value), the voltage thereof becomes the charging start voltage V _S corresponding to the charging start charging rate, the control unit 23 , The switch 25a is brought into contact with the terminal G to operate the power generation device 7, the switch 25b and the switch 25c are turned on to connect the cooling device 5, the lithium ion battery unit 6 and the power generation device 7, and the cooling device 5 is connected by the power generation device 7. actuates the to charge the lithium-ion battery unit 6 (this time, the voltage of the lithium-ion battery unit 6 rises from V _S.). Alternatively, the cooling device 5 may be operated by the lithium ion battery unit 6 while the lithium ion battery unit 6 is being charged by the power generation device 7 without directly operating the cooling device 5 by the power generation device 7. In order to extend the life of the lithium-ion battery unit 6, charging start voltage V _S is desirably SOC is corresponds to the charging start charging rate of 20% or more.

Proceeds charging of the lithium ion battery unit 6, the SOC reaches a predetermined charge stop charging rate (second reference value), its voltage reaches the charge stop voltage V _E corresponding to the charging stop charging rate, The control unit 23 stops the power generation device 7 to stop charging the lithium ion battery unit 6, and the lithium ion battery unit 6 operates the cooling device 5. However, stopping of the charging by controller 23 when the voltage of the lithium-ion battery unit 6 has reached the charge stop voltage V _E can be released by the operation unit 10 by hand, for example, reefer container 2 starting departure place By releasing the battery unit 6, the lithium ion battery unit 6 can be charged until it reaches 100% (until the voltage corresponds to 100% SOC).

The control unit 23 repeats the same control thereafter (see FIG. 4) to keep the luggage compartment 11 in the temperature range δT, but when the charging cable 19 is connected to the plug 20 in the container yard or the like, the switch 25b is turned on. The switch 25c is in contact with the terminal B, the switch 25a is in contact with the terminal P, the external power supply 27, the cooling device 5 and the lithium ion battery unit 6 are connected to the terminal C, and the lithium ion is charged while charging the lithium ion battery unit 6. The cooling device 5 is operated by the battery unit 6.

In FIG. 4, the charge stop charge rate (second reference value) is assumed to be higher than the charge start charge rate (first reference value), but the power source for operating the cooling device 5 is generated. The second reference value for switching to the device 7 may be the same as the first reference value for switching the power source for operating the cooling device 5 to the lithium ion battery unit 6.

The reefer container 2 according to the present embodiment includes a container main body 4, a cooling device 5 for cooling the inside of the container main body 4, a plug 20 to which an external power source 27 is connected, a lithium ion battery unit 6, and an engine 21. A power generation device 7 to be driven and a power supply switching device 25 for selecting any of an external power source 27, a lithium ion battery unit 6, and a power generation device 7 as a power source for operating the cooling device 5 are provided, and the power supply switching device 25 is a plug. When the charging cable 19 of the external power source 27 is connected to 20, the external power source 27 is selected as the power source for operating the cooling device 5, so that the electric power generated with high efficiency for operating the cooling device 5 is performed. By using the electric power supplied from the company or the like, it is possible to reduce the _{CO 2} by reducing the exhaust gas of the engine 21 that supplies power to the cooling device 5 without operating the engine 21.

Further, the power switching device 25 is controlled by the control unit 23, and when the external power supply 27 is not connected to the plug 20, and the SOC of the lithium ion battery unit 6 is equal to or less than the first reference value, the cooling device 5 When the power generation device 7 is selected as the power source for operating the lithium ion battery unit 6 and the SOC of the lithium ion battery unit 6 is equal to or higher than the second reference value when the external power source 27 is not connected to the plug 20, the power source for operating the cooling device 5. Since the lithium-ion battery unit 6 is selected as, the power generation device 7 will be used as an auxiliary when the SOC of the lithium-ion battery unit 6 is equal to or less than the first reference value, and the engine 21 will be used during long-distance transportation of cargo. It is possible to prevent a situation in which a large amount of exhaust gas is emitted over a wide area. For example, when the reefer container 2 is 40 feet, the electric power required to keep the temperature inside the luggage compartment 11 constant is about 1 kWh on average, and the battery capacity of the lithium ion battery unit 6 is 10 kWh, the starting point thereof. When SOC is 100% to 80%, the power generator 7 which generates electricity by the charging start voltage _{V S} to the SOC corresponding to the charging start charging rate of 64%, the power generation was started 2-4 hours after starting, During that time, zero-emission transportation that does not rely on the operation of the engine 21 becomes possible.

Further, the reefer container 2 calculates the cold insulation time t capable of holding the luggage compartment 11 in the temperature range δT based on the remaining charge of the lithium ion battery unit 6 and the fuel remaining amount of the power generation device 7, and sets the cold insulation time t. Since the control box 8 for displaying on the display 9 and transmitting to the server 3 is provided, the operation of the cooling device 5 is stopped due to the lithium ion battery unit 6 being out of charge and the power generation device 7 being out of fuel with reference to the cold insulation time t. Can be prevented. In the present embodiment, in particular, the server 3 receives the position information of the reefer container 2, the remaining charge of the lithium ion battery unit 6 and the remaining fuel of the power generation device 7 from the reefer container 2, and the position information and the remaining charge are received. And, based on the remaining amount of fuel, the navigation unit 26 for asking the transportation route of the reefer container 2 or the location of the charging facility or the like where the reefer container 2 should stop for charging the lithium ion battery unit 6 or refueling the power generation device 7 is provided. , The transporter of the reefer container 2 transmitted to the location of the transportation route or the charging facility or the like requested by the navigation unit 28 reliably operates the cooling device 5 to the destination according to the transportation route or by stopping at the charging facility or the like. Can be made to.

Although the embodiments of the present invention have been illustrated above, the embodiments of the present invention are not limited to those described above, and may be appropriately modified without departing from the spirit of the invention.

For example, in the above embodiment, the length of the container body 4 is 12 feet, 20 feet, or 40 feet, but the length of the container body 4 is 12 feet, 20 feet, or 40 feet including the dimensions of the cooling device 5 and the power generating device 7. Alternatively, the charge start charge rate and the charge stop charge rate may be used instead of the charge start voltage and the charge stop voltage.

In addition, various sensors have been added to the container body 4, and the control unit 23 has the temperature and humidity of a plurality of locations in the luggage compartment 11, the temperature and humidity of the outside air, the operating status and power consumption of the cooling device 5, and the operation of the power generation device 7. Status and power consumption, BMS data of lithium-ion battery (current, voltage, SOC, etc. for each lithium-ion battery unit or lithium-ion battery unit 6), temperature and humidity at the location where the lithium-ion battery unit 6 is installed, switches 25a, 25b, Information such as on / off data of the switch group of the power supply circuit (not shown) including 25c, data of the external power supply (voltage, electric energy, etc.), acceleration of the container body 4, and expected remaining transportation distance is transmitted by the communication unit 24. It may be transmitted to the outside such as the server 3. This transmission may be performed voluntarily by the control unit 23, or this information may be stored in a data logger and performed in response to an order from the outside, whereby the lithium ion battery unit 6 may perform this transmission. It is possible to precisely predict the out-of-charge, the out-of-fuel of the engine 21, etc. _{, calculate the control method for suppressing the CO 2} emission while preventing the out-of-charge and out-of-fuel, and feed it back to the reefer container 2.

All or part of this information is accumulated and used for learning artificial intelligence, and the artificial intelligence _{is effective in suppressing CO 2} emissions while preventing charge depletion and fuel depletion. Charge start charge rate or charge start voltage. Alternatively, the charge stop charge rate or the charge stop voltage may be variably calculated.

Further, the control box 8 shares the destination and the operation time zone (departure time, relay time, arrival time) input by the operation unit 10 or the like with the information management center that manages the server 3 prior to the operation of the reefer container 2. Then, the information on the temperature and weather forecast at regular time intervals in the middle area of the transportation route obtained by the navigation unit 28 is separately obtained, and the required amount of cooling or heating with respect to the set temperature of the container body 4 is determined by the heat dissipation characteristics of the container body 4. It may be calculated from and predicted. Specifically, the operating status of the cooling device 5, the power consumption and remaining charge of the lithium-ion battery unit 6, the operating status and remaining fuel of the power generation device 7, and the internal and external temperatures of the luggage compartment 11 are monitored, and the prediction at that time is made. The temperature inside the luggage compartment 11 before arriving at the destination is predicted while making corrections so that the difference from the actual situation is reduced. At that time, if it is predicted that the remaining charge and the remaining amount of fuel will be below a certain threshold for maintaining the temperature inside the refrigerator, it is necessary to stop by the charging facility, etc. as described above. In addition to transmitting the information to the operation supporter and the driver of the vehicle loaded with the reefer container 2, the temperature control in the energy saving mode may be instructed.

In the above embodiment, the container body 4 keeps the freshness of the cargo by keeping it cool, but as shown in FIG. 5, the electrodes 29 and 29 made of a pair of conductor plates are insulated from the side walls 12 and 12 of the luggage compartment 11. A high voltage of 1000 V may be applied between the electrodes by direct current or alternating current to work on the arrangement of water molecules in fresh food to maintain the freshness. The high voltage power source may be a lithium ion battery. It may be supplied by the unit 6. Alternatively, one conductor plate may be provided instead of a pair, and a charge field may be generated between the conductor plate and the side wall 12 or the roof 15 of the container body 4.

2 Reefer container 3 Server (navigation device)
4 Container body 5 Cooling device 6 Lithium-ion battery unit (storage battery)
7 Power generation device 9 Display (notification means)
20 plugs (external power supply connection)
21 engine (internal combustion engine)
23 Control unit (cooling time calculation means)
24 Communication unit (notification means, transmission means)
25 Power switching device (power selection unit)
27 External power supply 29 Electrodes

Claims (7)

With the container body
A cooling device that cools the inside of the container body,
The external power supply connection part to which the external power supply is connected and
With a storage battery
A power generator driven by an internal combustion engine and
A power supply selection unit for selecting any of the external power supply, the storage battery, and the power generation device is provided as a power source for operating the cooling device.
The reefer container is characterized in that, when the external power source is connected to the external power source connection unit, the power source selection unit selects the external power source as a power source for operating the cooling device. The storage battery is electrically connected only to the power supply selection unit.
The reefer container according to claim 1, wherein the power supply selection unit can cut off the connection between the storage battery and the cooling device, the external power supply connection unit, and the power generation device. When the external power source is not connected to the external power source connection unit and the SOC of the storage battery is equal to or less than the first reference value, the power source selection unit selects the power generation device as the power source for operating the cooling device. death,
When the external power source is not connected to the external power source connection portion and the SOC of the storage battery is equal to or higher than the second reference value, the storage battery is selected as the power source for operating the cooling device. The reefer container according to claim 1 or 2. The reefer container according to claim 3, wherein the first reference value is 64%. A cold insulation time calculating means for calculating a cold insulation time capable of holding the inside of the container body in a predetermined temperature range based on the remaining charge of the storage battery and the fuel remaining amount of the internal combustion engine.
The reefer container according to any one of claims 1 to 4, further comprising a notification means for displaying or transmitting the cold storage time to the outside. The temperature or humidity inside the container body, the temperature or humidity of the outside air, the operating status or power consumption of the cooling device, the operating status or power consumption of the power generation device, the current, voltage, SOC or remaining charge of the storage battery, or The reefer container according to any one of claims 1 to 5, further comprising a transmission means for transmitting the fuel remaining amount data of the internal combustion engine to the outside. The method according to any one of claims 1 to 6, wherein a conductor plate insulated from the container body is installed inside the container body as an electrode to which a voltage is applied. Reefer container.

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