JP6020228B2 - Refrigeration container system - Google Patents

Description

  The present invention relates to a refrigeration container system that supplies power from a generator to a plurality of refrigeration containers.

  Conventionally, a connection device and a monitoring device related to a refrigerated container described in Patent Document 1 are known. In this apparatus, a plurality of refrigeration containers are connected to a single distribution board via power lines. Further, it is an object of the present invention to provide a connection device that does not require routing of a communication line and enables centralized monitoring regardless of how signal line carrier type and power line carrier type load devices are mixed.

  In order to achieve this problem, the power line carrier type load device that superimposes and transmits the monitoring signal of the operating state on the power line and the signal line carrier type load device that transmits the monitoring signal through the signal line are connected to each other. Is supplied to refrigerated containers. In addition, for centralized monitoring, a connection device for transmitting a monitoring signal through a power supply side power line is provided.

  Moreover, the power line connector for connecting with the load side power line of any load apparatus, the signal line connector, the discrimination means, and the superimposition transmission circuit are provided. Among these, the signal line connector is a connector for connecting to a signal line of a signal line carrying type load device. The discriminating unit discriminates whether or not the connected load device is a signal line carrying type based on a predetermined signal from the signal line connector. The superposition transmission circuit superimposes and transmits the monitoring signal input to the signal line connector on the power supply side power line when the determination means determines that the signal line carrier type is used.

JP 2000-32686 A

  When the refrigerated container is placed on land, it is possible to supply power to a plurality of refrigerated containers via a distribution board as described in Patent Document 1 using a commercial power source. However, when a refrigerated container is mounted on a ship or train, a plurality of refrigerated containers are connected to a single generator in the ship or train.

  When the inventor supplies power to a plurality of refrigeration containers 2 (2a to 2c) from a single generator 1 as shown in FIG. The refrigeration container system which sets an allowable current value to each refrigeration container 2 connected to 1 was considered. When a current exceeding the set allowable current flows constantly, this current value is detected, and the circuit for supplying power to the refrigeration container 2 with an electromagnetic switch or the like is cut off.

  In the undisclosed refrigerated container system in the development process, the allowable current values of the refrigerated containers 2a to 2c are set equally so as not to exceed the power that can be generated by the generator 11. Therefore, the refrigeration cycle in the refrigeration containers 2a to 2c is operated so as not to exceed the allowable current.

  However, in the power distribution method in the development process described above, as shown in FIG. 23, a transient load fluctuation occurs due to the influence of solar radiation or the like, and the internal temperature of the specific refrigeration container 2c becomes the set temperature due to the increase in the refrigeration load. May exceed the upper or lower limit. In this case, the current (refrigeration capacity) is increased to the allowable current value, but it may take a long time to reach the set temperature range, or the cargo in the warehouse may be damaged without returning to the set temperature range. there were.

  The present invention has been made paying attention to such problems existing in the prior art, and when a specific internal temperature exceeds the set temperature range, it takes a long time to reach the set temperature range. It is an object of the present invention to provide a refrigerated container system that can prevent a situation where the temperature does not return to the set temperature range.

  Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

In order to achieve the above object, the present invention employs the following technical means. That is, in the present invention, a generator (1) that generates a power supply voltage, and a plurality of refrigeration containers (2a to 2n) that are supplied with a current within the range of the maximum generation current value from the generator (1) and cool the inside of the warehouse. Each of the refrigeration containers (2a to 2n) is supplied with current within the allowable current value range by the electric power of the generator (1), and the refrigeration apparatus (100) for adjusting the temperature inside the refrigerator, A control device (12) that calculates a necessary current value necessary for operation of the refrigeration apparatus (100) of the refrigeration container (2a to 2n), and other refrigeration containers (2a to 2n) other than its own refrigeration container (2a to 2n) ) and communication means for communicating with the control device (12) (101), has at least one control device (12) is acquired through the communication means (101), the required current of the plurality of refrigerated containers a total required current value is the sum of the values, Comparing means (S105, S135, S215) for comparing with the maximum electric current value, and the control device (12) has insufficient refrigeration capacity when the generated maximum current value is larger than the total required current value It is characterized by having an allowable current value increasing means (S96) for increasing the allowable current value with respect to the current consumed by the refrigeration apparatus (100) of the refrigerated containers (2a to 2n).

  According to this invention, the total required current value of the entire refrigeration container is compared with the generator maximum current. If the maximum power generation value is larger than the total required current value, the allowable current value for the current consumed by the refrigeration equipment of the refrigeration container with insufficient refrigeration capacity is increased. The refrigeration device in the refrigeration container can be operated.

  In addition, the code | symbol in parentheses described in a claim and each said means is an example which shows the correspondence with the specific means as described in embodiment mentioned later easily, and limits the content of invention is not.

1 is an electrical system diagram of a refrigerated container system showing a first embodiment of the present invention. It is a typical perspective view of the freezing container in the said embodiment. It is a schematic block diagram of the operation panel of FIG. 2 and the surrounding refrigeration container. It is a front view of the control box provided in the operation panel of the embodiment. It is an internal arrangement figure of a control box in the above-mentioned embodiment. It is a piping block diagram which shows the structure of the refrigerating cycle in the said embodiment. It is a whole flowchart which shows the control of the said embodiment. It is a flowchart which shows the master container selection control of the said embodiment. It is a flowchart which shows the refrigerating capacity excess / deficiency determination control of the said embodiment. It is a flowchart which shows the allowable current value calculation control of the said embodiment. It is a graph explaining the effect in the said embodiment. It is a whole flowchart which shows the control of 2nd Embodiment of this invention. It is a flowchart which shows the allowable current value calculation control of the said 2nd Embodiment. It is a graph explaining the effect in the said 2nd Embodiment. It is an electrical distribution diagram of the refrigerating container system which shows 3rd Embodiment of this invention. It is an electrical distribution diagram of the refrigeration container system which shows 4th Embodiment of this invention. It is an electric system figure of the refrigeration container system which shows 5th Embodiment of this invention. It is a whole flowchart which shows the control in the said 5th Embodiment. It is an electric system figure of the refrigeration container system which shows 6th Embodiment of this invention. It is an electrical system figure of the refrigeration container system which shows 7th Embodiment of this invention. It is a flowchart which shows the allowable current value calculation control in 8th Embodiment of this invention. It is an electrical distribution diagram of the refrigeration container system in the development process of the present invention. It is a graph explaining the effect | action in the said development process.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration.

  Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, the generator 1 for the refrigerated container in the ship generates a three-phase voltage of 440 volts, and a plurality (n units) of the refrigerated containers 2a, 2b, 2n (collectively referred to as the refrigerated containers 2). ). The maximum supply current value related to the maximum power of the generator 1 is set as the maximum generation current value, and the current value that needs to flow to each refrigeration container 2 in order to ensure sufficient refrigeration capacity of each refrigeration container 2 is the required current value. It is defined as

  In FIG. 2, a refrigeration device to be described later for cooling the refrigerated product in the refrigerator by a refrigeration cycle is provided in the refrigeration container 2, and an operation panel 3 provided with a control device to be described later is exposed on the surface. Yes.

  FIG. 3 shows a schematic configuration of the operation panel 3 shown in FIG. 2 and the refrigerated container 2 around the operation panel. FIG. 4 shows a front configuration of the control box 4 provided on the operation panel 3. As shown in FIG. 4, the control box 4 includes a display 5 made up of a liquid crystal device and a push button switch 6.

  In addition, in FIG. 3, an electric compressor (also simply referred to as a compressor) 5 is provided below the control box 4, and heat is absorbed from the heat exchanger 7 for radiating heat and the inside of the cabinet. An in-compartment cooling heat exchanger 8 constituting a heat exchanger is provided. In addition, a condenser blower 9 that blows air outside the warehouse to the heat exchanger 7 for heat dissipation is provided.

  The condenser blower 9 moves the air 9a so that the air 9a going in the depth direction in FIG. 3 passes through the heat dissipation heat exchanger 7 and then flows in the front direction in FIG. Further, on the upper back side of FIG. 3, evaporator fans 11a and 11b for blowing the air in the warehouse to the inside cooling heat exchanger 8 composed of an evaporator are provided.

  FIG. 5 shows the internal arrangement of the control box 4. The control box 4 is provided with a control device 12 having a CPU (Central Processing Unit), an electrical component 13 such as an electromagnetic switch and a breaker, and a monitoring controller 14 for receiving a signal from the ship's central monitoring device. ing. The control device 12 stores information on a container ID (container registration code) regarding the refrigerated container 2 provided therein in an internal memory.

  FIG. 6 shows the configuration of the refrigeration cycle in the refrigeration apparatus 100. The refrigeration cycle in the refrigeration apparatus 100 connects the compressor 5, the condenser 7 that constitutes a heat exchanger for heat dissipation, the receiver 12, the decompression means 13, the evaporator 8 that constitutes a heat exchanger for internal cooling, and the accumulator 14. It is a well-known thing which consists of refrigerant | coolant piping. First, the compressor 5 sucks the gas-phase refrigerant and compresses it to a high temperature and a high pressure, and the number of revolutions in the electric motor for driving the compressor is controlled by the inverter.

  The condenser 7 condenses the refrigerant discharged from the compressor 5, and the internal refrigerant is cooled and condensed by the cooling air blown by the condenser blower 9. The receiver 12 separates the refrigerant condensed in the condenser 7 into a gas-phase refrigerant and a liquid-phase refrigerant, and stores and discharges the liquid-phase refrigerant.

  The expansion valve 13 serving as a decompression unit decompresses the liquid phase refrigerant from the receiver 12. The expansion valve 13 is an electronic expansion valve that is operated by an opening degree signal calculated from the CPU using a temperature thermistor (not shown) that detects the outlet refrigerant temperature of the evaporator 8, and determines the degree of superheat of the outlet refrigerant of the evaporator 8. The valve opening (refrigerant flow rate) is adjusted so as to maintain a predetermined position.

  The evaporator 8 heat-exchanges the refrigerant decompressed by the expansion valve 13 with the air in the freezer compartment circulated by the refrigeration fans 11a and 11b constituting the evaporator fan, evaporates the refrigerant, and circulates air by the latent heat of evaporation. It is a heat exchanger that cools. The accumulator 14 separates the refrigerant that has passed through the evaporator 8 into a gas phase refrigerant and a liquid phase refrigerant, and leads the gas phase refrigerant to the compressor 5 while storing the liquid phase refrigerant.

  A drain pan (not shown) that receives and collects condensed water generated from the evaporator 8 is provided below the evaporator 8. The condensed water collected in the drain pan passes through a drainage passage, passes through a drain hose connected to the drainage passage, exits the freezer compartment, and is drained under a vehicle floor (not shown).

  In addition, a defrosting bypass circuit BP is provided which communicates the discharge side P1 of the compressor 5 with the downstream side of the expansion valve 13 and the upstream side P2 of the evaporator 8 to guide hot gas. In this case, the defrosting bypass circuit BP is provided with an electromagnetic valve 16 as an opening / closing means.

  Further, a part of the refrigerant pipe 15 forming the defrosting bypass circuit BP also serves as a drain pan heater 15a for heating the drain pan during hot gas defrosting, and is installed so as to be folded over the inner surface of the drain pan. Yes.

  FIG. 7 shows an overall flowchart of the control. The control of FIG. 7 is periodically executed. In FIG. 7, when control is started, various input information is read in step S71. At this time, each refrigeration container 2 reads the initial allowable current of each refrigeration container 2 manually input by the push button switch 6 of FIG.

  Next, in step S72, master container selection control is executed so that one of the plurality of refrigerated containers 2 is a master container. Next, in step S73, refrigerating capacity excess / deficiency determination control of each refrigerated container 2 is executed. This refrigerating capacity excess / deficiency determination control is for determining whether the refrigerating capacity of each refrigeration container 2 is excessive or insufficient. Next, in step S74, allowable current calculation control is executed, and the allowable current assigned to each refrigeration container 2 is calculated.

  FIG. 8 shows master container selection control (step S72). The control device 12 including the CPU of FIG. 5 stores information on the container ID related to the refrigerated container 2 provided therein in an internal memory. In FIG. 8, when the master container selection control is started, the control devices 12 communicate with each other via the power line carrier type communication line 101 (FIG. 1) in step S81, and the container IDs are compared between the refrigerated containers 2. To do. Next, in step S82, the refrigerated container 2 having the smallest container ID (if it is a number) is determined as the master container.

  FIG. 9 shows the refrigerating capacity excess / deficiency determination control (step S73). When the refrigeration capacity excess / deficiency determination starts, it is determined in step S91 whether or not the internal temperature in the refrigerated container 2 is within a preset temperature range. If the internal temperature is within the preset temperature range, in step S92, the average current consumption value of the refrigeration apparatus 100 when the internal temperature is within the set temperature range is stored.

  Next, in step S93, it is determined whether or not the internal temperature has been maintained within the set temperature range for a predetermined time (1 hour in this embodiment) or more. If the internal temperature has continued within the set temperature range for 1 hour or longer, in step S94, the refrigeration apparatus within the set temperature range calculates the necessary current value necessary for the refrigeration container 2 to obtain sufficient refrigeration capacity. The allowable current value is changed as the average current consumption value flowing into 100. The allowable current value is a set value set in the device, and the necessary current value is a set value calculated by the control device.

  In addition, the allowable current value that was initially set is changed according to the required current value. In this embodiment, the allowable current value is set to the same value as the required current value, but the allowable current value may be set to a value larger than the required current value by a predetermined amount.

  Further, in step S95, the changed necessary current value (allowable current value) is transmitted to the control device (master control device) 12 of the master container, and the allowable current value is updated and stored in the memory in the master control device 12.

  If it is determined in step S91 that the internal temperature is not within the set temperature range, the process proceeds to step S93. If the internal temperature does not continue within the set temperature range for 1 hour or longer in step S93, the freezing container 2 is sufficiently refrigerated in step S96 from the deviation between the set temperature and the internal temperature at that time. Calculate the necessary current required to demonstrate the capability using a map. The map stores a value determined in advance in an experiment in the control device 12. Next, the process proceeds to step S97, where the calculated required current value is transmitted to the master control device 12, and the required current value is updated and stored in the memory of the master control device 12.

  Next, FIG. 10 shows allowable current value calculation control (step S74). When the current value mainly consumed by the compressor 5 of the refrigeration apparatus 100 of each refrigeration container 2 exceeds the allowable current value, the breaker or the electromagnetic switch is turned off and the compressor 5 is stopped.

  The allowable current value can be set and changed manually using the display 5 and the push button switch 6 in the control box 4 of FIG. Further, the allowable current value can be set and changed by a signal from the master control device 12 or a signal from a central monitoring device (not shown) via the monitoring controller 14.

  When the allowable current value calculation control in FIG. 10 is started, it is determined in step S101 whether or not the refrigerated container 2 of the control device 12 executing this control is a master container. If it is a master container, it is determined in step S102 whether or not allowable current value change information from each refrigerated container 2 is received. This allowable current value change information is the allowable current value in step S95 of FIG.

  If there is the allowable current value change information, the process proceeds to step S103, where the total required current value that is the total value of the allowable current values of the refrigerated containers 2 is calculated, and the already stored total required current value is updated. In step S102, when the allowable current value change information from each refrigerated container 2 has not been received, the process immediately proceeds to step S104, and it is confirmed whether the necessary current value change information from each refrigerated container 2 has also been received, If not received, the allowable current value calculation control is terminated.

  In step S104, when the required current value change information from each refrigerated container 2 is received, in step S105, the generated maximum current value related to the maximum power of the generator 1 and the total required current value updated in step S103. Compare If the total required current value is larger than the maximum power generation current value, the process proceeds to step S106. If not, the allowable current value of the container that has output the required current value information is updated in step S108, and the control ends. .

  In step S106, since the total required current value is larger than the maximum power generation current value, the allowable current value of each refrigerated container 2 is uniformly reduced so that the total required current value does not exceed the maximum power generation current value. . For this purpose, the excess amount is calculated by calculating how much the total required current value is larger than the maximum generation current value, and this excess amount is divided by the number of refrigerated containers 2 connected to the same generator 1 to be uniform. Calculate the reduction amount. Further, in step S106, a value obtained by subtracting the uniform reduction amount from the required current value of each refrigerated container 2 which is the basis for calculating the total required current value is set as the required current value (= allowable current value) of each refrigerated container 2. Assign.

  Furthermore, in step S107, the compressor 5 of the refrigeration apparatus 100 of each refrigeration container 2 is operated so as not to exceed the allocated allowable current value, and the allowable current value calculation control is terminated. In order not to exceed the allocated allowable current value, the refrigeration container 2 reduces the number of rotations of the compressor 5 with an inverter and decreases the refrigeration capacity.

  FIG. 11 shows the operational effects of the first embodiment. In FIG. 11, the total number of refrigerated containers 2 is set to three for easy understanding. Now, it is assumed that the refrigeration loads of the refrigeration containers 2a and 2b are stabilized and calculated as in steps S94 and S95 in FIG. 9, and the allowable current value is changed from the initial set value. In addition, it is assumed that the fluctuation of the refrigeration load of the refrigeration container 2c is large and the internal temperature does not continue within the set temperature for one hour or more in step S93.

  In this case, in the refrigeration containers 2a and 2b, the allowable current value is reduced from the initial set value in the refrigeration containers 2a and 2b as in the remaining power current values (reduced allowable current values) Ya1 and Yb1 in FIG. Therefore, the allowable current of the refrigeration container 2c can be accumulated by the remaining current value (reduced allowable current value) Ya1, Yb1.

  As a result, the refrigeration container 2c can increase the refrigeration capacity by the allowable current value obtained from the other refrigeration containers 2a and 2b, and the quality of the refrigerated goods in the refrigeration container 2c can be prevented from deteriorating.

  Then, the refrigeration load of each of the refrigeration containers 2a to 2c is increased and the allowable current value is updated so as to increase. Finally, in step S105 of FIG. 10, the total required current value exceeds the power generation maximum current value. As in steps S106 and S107, the allowable current values of all the refrigerated containers 2a to 2c are uniformly reduced.

  As a result, the total required current after the reduction is prevented from exceeding the generator maximum current, so that the generator 1 does not fail. Further, only the specific refrigeration container 2c does not rapidly deteriorate the refrigeration quality. In addition, between step S106 and step S107, the fact that the allowable current value has been forcibly reduced uniformly is transmitted to the central monitoring device, and necessary processing can be promoted.

  Thus, in the first embodiment, a refrigeration container system is provided in which a plurality of refrigeration containers 2a to 2n are connected to a single generator 1 through power lines and supplied with power. And each refrigeration container 2a-2n has a communication means with the communication line 101 which can transmit own power consumption information outside, or can receive the power consumption information of refrigeration containers 2 other than itself. .

  Using this communication means 10, the remaining temperature of the other refrigeration containers 2 a and 2 b (reduced allowable current) is added to the refrigeration container 2 c where the internal temperature exceeds (or is likely to exceed) the set temperature range due to load fluctuation. Value)), the increased allowable current value can be assigned.

  Further, when the refrigerating capacity is sufficient, the allowable current value is changed to the average current consumption value recorded while the internal temperature is within the set temperature range, and the changed allowable current value is transmitted to the master container. On the other hand, when the refrigerating capacity is insufficient, the necessary current value is calculated from the deviation between the set temperature and the internal temperature, and the necessary current value is transmitted to the master controller in the master container. In this case, the control device 12 on the slave side does not change the setting of the allowable current value according to the necessary current value obtained from the deviation without permission, but changes it by obtaining permission or instruction from the master control device 12.

  Differences between the first embodiment and the development process apparatus of FIGS. 22 and 23 will be described. In the technology of the development process, when a refrigeration load occurs transiently due to the effects of solar radiation and the temperature inside the freezer container 2c exceeds the set temperature range, the current (refrigeration capacity) is reduced to the limit of the allowable current value. increase. However, there is a possibility that it takes time to reach the set temperature range, or the luggage in the warehouse may be damaged without being able to return to the set temperature range.

  On the other hand, in the first embodiment, when the refrigeration load of one refrigeration container (for example, 2c) suddenly increases, the remaining current values Ya1 and Yb1 are obtained from the other refrigeration containers 2a and 2b as shown in FIG. It is possible to reduce the possibility that the cargo in the warehouse will be damaged by accommodating.

(Operational effects of the first embodiment)
In the said 1st Embodiment, the generator 1 which generate | occur | produces a power supply voltage, and the some freezing containers 2a-2n which are supplied with the electric current in the range of the electric power generation maximum current value from the generator 1, and cool the inside of a store | warehouse | chamber are provided. Yes. Each of the refrigeration containers 2a to 2n includes a refrigeration apparatus 100 that adjusts the temperature of the inside of the refrigeration apparatus 100 that is supplied with a current within a range of allowable current values by the electric power of the generator 1, and the refrigeration apparatuses 100 of its own refrigeration containers 2a to 2n. It has the control apparatus 12 which calculates the required electric current value required for driving | operation, and the communication means 101 which communicates with the control apparatuses 12 of other refrigeration containers 2a-2n other than own refrigeration containers 2a-2n.

  At least one of the control devices 12 includes a comparison unit S105 that compares the total required current value of the entire refrigerated containers 2a to 2n acquired via the communication unit 101 with the maximum power generation current value. Moreover, the control apparatus 12 increases the allowable current value with respect to the current consumed by the refrigeration apparatus 100 of the refrigeration containers 2a to 2n having the insufficient refrigeration capacity when the maximum power generation current value is larger than the total required current value. An allowable current value increasing means S96 is provided.

  According to this, when the power generation maximum current value is larger than the total required current value, the allowable current value with respect to the current consumed by the refrigeration apparatus 100 of the refrigeration container 2c having insufficient refrigeration capacity is increased. Therefore, the refrigeration apparatus 100 in the refrigeration container 2 can be operated by making the best use of the capacity of the generator 1.

  The allowable current value increasing means S96 calculates a required current value from the deviation between the set temperature in the refrigerator of its own refrigerated container 2 and the temperature in the refrigerator. Then, the allowable current value is increased based on the necessary current value.

  According to this, the control device 12 is necessary to sufficiently cool the inside of the refrigerator when there is a deviation between the internal temperature of the freezer container 2 and the set temperature due to the load fluctuation of the freezer 100. The necessary current value is calculated and the allowable current value of the refrigerated container 2 is increased. Therefore, it is possible to sufficiently cool the interior by using the comparison result between the total required current value and the maximum power generation current value.

  The control device 12 includes a reduction unit S106 that reduces the allowable current value of the refrigeration apparatus 100 that can be controlled via the communication unit 101 when the total required current value is larger than the maximum power generation current value. Then, the refrigeration apparatus 100 is operated within the range of the reduced allowable current value.

  According to this, when the total required current value is larger than the maximum power generation current value, the control device 12 reduces the allowable current value of the refrigeration apparatus 100 that can be controlled via the communication unit 101, and this reduction is achieved. The refrigeration apparatus 100 is operated within the allowable current value range. Therefore, the generator 1 can be prevented from being overloaded.

  Each control device 12 in the plurality of refrigerated containers 2 has means S72 for selecting a master container. The master control device 12 including the control device 12 of the refrigerated container 2 selected as the master container has a comparison unit S105.

  According to this, the master control device 12 composed of the control device 12 for the refrigerated container selected as the master container compares the total required current value of the entire refrigerated container 2 with the power generation maximum current value. Then, when the power generation maximum current value is larger than the total required current value, the allowable current value for the current consumed by the refrigeration apparatus 100 of the refrigerated container 2 is increased. Accordingly, it is possible to eliminate the calculation in the overlapping control device 12.

  The calculation of the necessary current value necessary for the operation of the refrigeration apparatus 100 of the own refrigeration container 2 is performed when the refrigeration apparatus 100 within the predetermined time is maintained when the temperature in the warehouse is maintained within the set temperature range for a predetermined time or longer. Let the average current consumption value be the calculated required current value. Alternatively, when the internal temperature does not continue within the set temperature range for a predetermined time or longer, a value calculated from the deviation between the set temperature and the internal temperature is set as the calculated required current value. According to this, it is possible to easily calculate the necessary current value necessary for the refrigerated container 2 to sufficiently adjust the temperature in the warehouse.

  The control device 12 has means for setting an allowable current value that regulates the magnitude of the current flowing from the generator 1 in each of the plurality of refrigeration containers 2. The allowable current value is changed based on the required current value calculated from the initial allowable current value set at the beginning of the control.

  According to this, the initial allowable current value that was initially set is changed based on the calculated required current value, and the required current value and the allowable current value are changed within the range of the maximum power generation value of the generator 1. Thus, it is possible to cope with a change in the load of the refrigeration apparatus 100 of the refrigeration container 2.

  The initial allowable current value is a value that is evenly divided by dividing the maximum power generation current value by the number of the plurality of refrigerated containers 2. According to this, the initial allowable current can be easily set. The number of the plurality of refrigerated containers 2 is determined from the container ID information of the plurality of refrigerated containers 2 via the communication unit 101. According to this, the number of the plurality of refrigerated containers 2 can be automatically grasped.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof will be omitted, and different configurations and features will be described. In addition, about 2nd Example or less, the same code | symbol as 1st Example shows the same structure, Comprising: The description which precedes is used.

  The allowable current setting in the first embodiment is manually set to an arbitrary value for each refrigeration container 2, but in the second embodiment, the initial allowable current is equally allocated. That is, in the second embodiment, as shown in FIG. 12 to FIG. 14, the initial allowable current assigned to each refrigeration container 2 is set by dividing (dividing) the maximum power generation current by the number of refrigeration containers 2, The remaining current value that does not exceed the initial allowable current is passed to the refrigeration container 2 that has insufficient refrigeration capacity.

  FIG. 12 shows the control in the refrigerated container 2 of the second embodiment corresponding to FIG. In FIG. 12, in step S121, the initial allowable current of each refrigerated container 2 is set equally by dividing the maximum power generation current by the number of refrigerated containers 2 (total number). Steps S122 to S124 are substantially the same as those in the first embodiment. FIG. 13 shows the allowable current value calculation control of the second embodiment corresponding to FIG. The second embodiment will be specifically described below.

  First, in step S122 of FIG. 12 described above, master container selection control is executed. As described above, the control device 12 (FIG. 5) provided with the CPU stores the container ID information related to the refrigerated container 2 provided therein in the internal memory. When the master container selection control in step S122 is started, the control devices 12 communicate with each other and compare the container IDs between the refrigerated containers 2. And the frozen container 2 with the youngest container ID is determined as a master container.

  The flowchart showing the refrigerating capacity excess / deficiency determination control of FIG. 9 is also applied to step S123 of the second embodiment. When the refrigeration capacity excess / deficiency determination in step S123 is started, it is determined in step S91 in FIG. 9 whether or not the internal temperature in the refrigerated container 2 is within a preset temperature range. If the internal temperature is within the preset temperature range, in step S92, the average current consumption value of the refrigeration apparatus when the internal temperature is within the set temperature range is stored.

  Next, in step S93, it is determined whether or not the internal temperature has continued within the set temperature range for a predetermined time (1 hour in the second embodiment) or more. If the internal temperature has continued within the set temperature range for 1 hour or longer, in step S94, the allowable current value is changed with the required current value as the average current consumption value of the refrigeration apparatus 100 during the set temperature range. .

  Also, the allowable current value is set according to the required current value (simply set to the same value). Furthermore, in step S95, the changed allowable current value is transmitted to the master controller 12, and the necessary current value is updated and stored in the memory of the master controller 12.

  If it is determined in step S91 that the internal temperature is not within the set temperature range, the process proceeds to step S93. If the internal temperature does not continue within the set temperature range for 1 hour or longer in step S93, the freezing container 2 is sufficiently refrigerated in step S96 from the deviation between the set temperature and the internal temperature at that time. Calculate the required current value necessary for demonstrating the capability using a map. In step S97, the calculated required current value is transmitted to the master control device 12, and the required current value is updated and stored in the memory of the master control device 12.

  Next, FIG. 13 shows allowable current value calculation control (step S124) in the second embodiment. When the current value mainly consumed by the compressor 5 of the refrigeration apparatus 100 of each refrigeration container 2 exceeds the allowable current value, the breaker or the electromagnetic switch is turned off and the compressor 5 is stopped.

  The initial allowable current value is set evenly in step S121 of FIG. When the allowable current value calculation control (step S124) in FIG. 13 is started, it is determined in step S131 whether or not the refrigerated container 2 of the control device 12 executing this control is a master container.

  If it is a master container, it is determined in step S132 whether or not allowable current value change information from each refrigerated container 2 is received. This allowable current value change information is the necessary current value in step S95 in FIG.

  If there is allowable current value change information, the process proceeds to step S133, where the total allowable current value of each refrigerated container 2 is calculated and the already stored allowable current value is updated. In step S132, if the permissible current value change information from each refrigerated container 2 is not received, the process immediately proceeds to step S134, and if the necessary current value change information from each refrigerated container 2 is not received, the permissible current value change information is allowed. The current value calculation control is terminated.

  In step S134, when the required current value change information from each refrigerated container 2 is received, in step S135, the generated maximum current value related to the maximum power of the generator 1 and the total required current value updated in step S133. Compare If the total required current value is larger than the maximum power generation current value, the process proceeds to step S136. If not, the allowable current value of the container that has output the required current value information is updated in step S138, and the control ends. .

  In step S136, since the total required current value is larger than the maximum power generation current value, the allowable current value of all the refrigerated containers 2 set uniformly in step S121 in FIG. 12 is uniformly reduced (for example, a predetermined amount subtraction is performed). Or multiply by a predetermined value less than 1) so that the total allowable current value does not exceed the maximum power generation current value. For this purpose, the excess amount is calculated by calculating how much the total allowable current value is larger than the maximum generation current value, and this excess amount is divided by the number of refrigerated containers 2 connected to the same generator 1 to reduce it uniformly. Calculate the quantity.

  Next, in step S136, a value obtained by subtracting the uniform reduction amount from the required current value of each refrigerated container 2 which is the basis for calculating the total required current value is assigned as a new allowable current value of each refrigerated container 2. Furthermore, in step S137, the refrigeration apparatus 100 of each refrigeration container 2 is operated so as not to exceed the allocated new allowable current value, and the allowable current value calculation control is ended. In order to prevent the allocated allowable current value from being exceeded, the refrigeration container 2 to which the allowable current value less than the necessary current value is allocated is used to reduce the refrigerating capacity by reducing the rotation speed of the compressor 5 with an inverter. Become.

  FIG. 14 shows the operational effects of the second embodiment. In FIG. 12, the total number of the refrigerated containers 2 is three for easy understanding. Now, it is assumed that the refrigeration loads of the refrigeration containers 2a and 2b are stabilized and calculated as in steps S94 and S95 in FIG. 9, and the allowable current value is changed from the initial set value.

  In addition, it is assumed that the fluctuation of the refrigeration load of the refrigeration container 2c is large, and the internal temperature does not continue within the set temperature for one hour or more in step S93. In this case, since the allowable current values in the refrigeration containers 2a and 2b are reduced by the remaining power current values Ya2 and Yb2 from the initial values as in the remaining power current values Ya2 and Yb2 in FIG. 14, the allowable current in the refrigeration container 2c. The values can be accumulated by the remaining currents Ya2 and Yb2.

  As a result, the refrigeration container 2c can increase the refrigeration capacity by the remaining current values Ya2 and Yb2, which are the allowable currents obtained from the other refrigeration containers 2a and 2b. Quality degradation can be prevented.

  In step S135 of FIG. 13, when the total required current exceeds the maximum power generation current, the required current value of all the refrigerated containers 2, that is, the initial allowable current value is uniformly reduced as in steps S136 and 137. As a result, the total allowable current is prevented from exceeding the generator maximum current, so that the generator 1 does not fail.

  Further, only the specific refrigeration container 2c does not rapidly deteriorate the refrigeration quality. In addition, between step S136 of FIG. 13 and step S137, you may transmit that the permissible current value was forcibly uniformly reduced to the central monitoring apparatus.

(Third embodiment)
Next, a third embodiment of the present invention will be described. Features different from the above-described embodiment will be described. FIG. 15 shows an electric system of the refrigeration container system showing the third embodiment of the present invention. In the first embodiment and the second embodiment, the rated output or the like of the generator 1 is input to the control device 12 of each refrigerated container 2 by the push button switch 6 (FIG. 4). The maximum power generation value that can be extracted from 1 was found.

  On the other hand, in the third embodiment, as shown in FIG. 15, the control device 12 (FIG. 5) in the refrigeration containers 2 a to 2 n determines the maximum power generation current value (power generation possible power information) that can be taken out from the generator 1. It captures at intervals.

  Thereby, the input labor to the push button switch 6 can be saved, and the control device 12 can take in the maximum generated current value corresponding to the changing ability of the generator 1. The power generation maximum current value is captured in step S71 in FIG. 7 or step S121 in FIG. Moreover, although the three refrigeration containers 2 connected to the generator 1 have been described, any number of the refrigeration containers 2 may be connected.

  Then, the master control device 12 acquires information on the maximum power generation current value from the generator 1, and the acquired maximum power generation current value and the necessary current values of the other refrigeration containers 2 a to 2 n connected to the same generator 1. Therefore, the current consumption of each of the refrigerated containers 2a to 2n is controlled so as not to exceed the power that can be generated. Specifically, the rotational speed of the electric compressor 5 is controlled.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. Features different from the above-described embodiment will be described. FIG. 16 shows the electrical system of the refrigeration container system showing the fourth embodiment of the present invention. In FIG. 16, selection of a master container is performed based on manual input information from the control box 4 of FIG. Note that the flowchart of FIG. 7 may be left as it is, and if the selection of the master container is manually input from the control box 4 in step S71 for reading various input information, the manually input information is replaced with the selection control in step S72. Priority should be given.

  As described above, in the fourth embodiment, the control device 12 does not voluntarily select a master container but performs input from the outside. The master container may be selected with the highest priority given to information from the monitoring controller 14 (FIG. 5) that receives a signal from the ship's central monitoring device.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. Features different from the above-described embodiment will be described. In FIG. 17, a plurality of refrigeration containers 2 a to 2 n are connected to the generator 1 via power cables and connectors. Next, before the compressor 5 in each refrigeration container 2a-2n operates, an initial current common to all the refrigeration containers 2a-2n is passed through an impedance circuit (not shown) in the operation panel 3 (FIG. 2). Flowing.

  The total value of the initial current is detected by the control circuit on the generator 1 side, and is transmitted as one of various input information into the master controller 12 of the refrigeration containers 2a to 2n. Thereby, in step S181 of FIG. 18, it becomes clear from the total value of the initial current how many refrigeration containers 2a to 2n are connected to the generator 1.

  If the plurality of refrigerated containers 2 are not activated at the same time, the number of times that the initial current of the refrigerated containers 2 that are sequentially activated flows may be integrated to grasp the number. In this way, the number of the plurality of refrigeration containers (2a to 2n) is easily and automatically determined based on the total value of the initial currents flowing through the plurality of refrigeration containers (2a to 2n) or the number of times the initial currents flowed. The number of 2a to 2n) can be determined.

  If the number of container IDs does not match the number determined from the total value of the initial current, etc., the refrigerated containers 2a to 2n have no communication function or have a poor communication function (FIG. 17). ) Is found to be mixed.

  The number of refrigeration containers 2 that are currently connected to the generator 1 is set to the maximum power generation value of the generator 1, as in step S181, including the case where the refrigeration containers 2n that cannot perform the communication function are mixed. The value divided by (including the number of refrigerated containers 2 that cannot perform the communication function) is set and stored as the initial allowable current value of each refrigerated container 2 (the equal distribution value that is the initial allowable current value is set and stored). .

  Next, in step S182, a master container is selected between the refrigerated containers 2 having a communication function. In steps S183 and S184, the refrigeration capacity excess / deficiency determination control and the allowable current calculation control are performed as shown in FIGS. 9 and 13 between the refrigerated containers 2 having the communication function. This will be described below.

  The required current value of the refrigerated container 2n that cannot perform the communication function is treated as the same as the initial allowable current value. Therefore, the total required current value of FIG. 13 used by the fifth embodiment includes the required current value of the refrigerated container 2n that cannot perform the communication function.

  The initial allowable current value of all the refrigerated containers 2 is uniformly reduced and the new allowable current value is assigned to the refrigerated containers 2n that cannot perform the communication function. If the refrigerated container 2n that cannot perform the communication function exceeds the new allowable current value, an alarm is issued by the switchboard on the generator 1 side not shown, and the alarm is forcibly reduced or the circuit is cut off. To do.

  In addition, before the compressor 5 in each freezing container 2a-2n operate | moves, all the freezing containers 2a-2n are passed through the impedance circuit in the operation panel 3 (an impedance value is common in each freezing container 2). Instead of allowing the common initial current to flow, the refrigeration containers 2a to 2n may be forcibly operated at a constant current consumption by a constant current control device in the switchboard on the generator 1 side in the initial stage. By doing in this way, you may confirm automatically the number of the freezing containers 2a-2n connected to the generator 1 from the total consumption current value. This also leads to a reduction in the total starting current when starting the compressor 5.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described. Features different from the above-described embodiment will be described. In FIG. 19, refrigeration containers 2 a to 2 n are electrically connected to the generator 1. Moreover, the remote monitoring apparatus 20 (FIG. 19) by the side of the ship is electrically connected to the control apparatus 12 of FIG. 5 of each freezing container 2a-2n via the monitoring controller 14 (FIG. 5).

  The allowable current value of each of the refrigerated containers 2a to 2n is determined by an instruction from the remote monitoring device 20 using a communication signal. Also in this case, the flowcharts of the first embodiment and the second embodiment can be utilized.

  That is, when the allowable current value of each refrigerated container 2 is not instructed by the communication signal from the remote monitoring device 20, the initial allowable current value is read as various input information in steps S71 and S121 of FIGS. Then, a master container is selected. However, when the allowable current value of each of the refrigerated containers 2a to 2n is forcibly instructed by the communication signal from the remote monitoring device 20, the highest priority is given to the allowable current value from the remote monitoring device 20. When the forced instruction of the allowable current value is canceled, the normal control is returned.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described. Features different from the above-described embodiment will be described. In FIG. 20, refrigeration containers 2 a to 2 n are electrically connected to the generator 1. Without determining the master container, the control device 12 in each of the refrigerated containers 2a to 2n acquires the allowable consumption current value other than its own refrigerated containers 2a to 2n by communication, and does not exceed the power generation possible power of the generator 1. As such, it determines its own allowable current value.

  In this case, master container selection control as in the first and second embodiments is not necessary. Further, the refrigeration capacity excess / deficiency determination control and the allowable current value calculation control are executed inside all the control devices 12.

  Since there is no master control device 12, the allowable current value and the necessary current value are stored in the master storage unit in its own control device 12. Via the communication means 101, the allowable current value and the necessary current value of the other refrigerated containers 2 are also stored in each control device. Then, the allowable current value calculation control is executed in all the control devices 12.

  Although control is possible even when a master container is not selected in this way, the control contents in all the control devices 12 in each refrigeration container 2 are duplicated, and the control unit 12 uniformly controls the own refrigeration container 2. It is necessary to unify standards such as unifying the ratio of reducing the allowable current value.

(Eighth embodiment)
Next, an eighth embodiment of the present invention will be described. Features different from the above-described embodiment will be described. In FIG. 21, step S216 for generating an alarm is added in the allowable current value calculation control.

  The initial allowable current value is set in step S121 of FIG. When the allowable current value calculation control in FIG. 21 (corresponding to step S124 in FIG. 12) is started, it is determined in step S211 whether or not the refrigerated containers 2a to 2n of the control device 12 executing this control are master containers. The

  If it is a master container, it is determined in step S212 whether or not allowable current value change information from each of the refrigerated containers 2a to 2n is received. This allowable current value change information is the allowable current value in step S95 of FIG.

  If there is allowable current value change information, the process proceeds to step S213, where the total required current value of each of the refrigerated containers 2a to 2n is calculated, and the already stored total required current value is updated.

  In step S212, when the allowable current value change information from each of the refrigerated containers 2a to 2n has not been received, the process immediately proceeds to step S214, and again the required current value change information from each of the refrigerated containers 2a to 2n has not been received. In this case, the allowable current value calculation control is terminated.

  In step S214, when the necessary current value change information is received from each of the refrigerated containers 2a to 2n, in step S215, the generated maximum current value related to the maximum power of the generator 1 and the total required current updated in step S213. Compare the value. If the total necessary current value is larger than the maximum power generation current value, the process proceeds to step S216. If not, the allowable current value of the container that has issued the necessary current value information is updated in step S218, and the control is terminated. .

  In step S216, since the total required current value is larger than the maximum power generation current value, an alarm is sounded to notify the user (ship manager, etc.) that the refrigeration capacity is insufficient. The forced and automatic uniform reduction control of the allowable current value is not executed.

  In step S217, even if there is a manual setting of increase in allowable current, it is not accepted, and only in the case where there is a manual operation for reducing allowable current, it is accepted (permitted) in step S217. In this way, the master controller 12 allows only the reduction of the allowable current value to be updated, so that the slave container can change the necessary current value (= allowable current value). . And each refrigeration container 2 updates a required electric current value (= allowable electric current value) without permission, and it prevents that a system fails (power generation maximum electric current value over).

  In the eighth embodiment, the control device 12 includes means S216 that issues an alarm when the total required current value is larger than the maximum power generation current value. According to this, it can be urged to take measures before an adverse effect is exerted on the frozen product in the refrigerator container by the alarm.

(Other embodiments)
In the above-described embodiment, the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. It is. The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  In each of the above-described embodiments, the description has been made assuming that the required current value is equal to the allowable current value in order to simplify the description. However, the allowable current value may be set according to the calculated required current value, and the allowable current value is allowed to be larger than the required current value so that the allowable current value is exceeded immediately and there is no alarm or circuit interruption. A current value may be set.

  Next, when receiving the allowable current value change information, the master control device updates the allowable current total value of each refrigerated container 2. When the necessary current value information is received, the master control device may compare the necessary current value of the refrigeration container with insufficient refrigeration capacity with the remaining current value (reduced allowable current value). In this comparison, it is confirmed whether or not the power that can be generated by the generator is sufficient. If there is a surplus power for the power that can be generated, the change of the allowable current value may be permitted by the required current value. When there is no surplus power for the power that can be generated, the allowable current value of the refrigeration container may be changed so as to reduce the allowable current value uniformly from the refrigerated container.

  In the above embodiment, the defrosting bypass circuit BP that communicates the discharge side P1 of the compressor 5 (FIG. 6) with the downstream side P2 of the expansion valve 13 and the upstream side P2 of the evaporator 8 to guide hot gas is provided. Although provided, the defrosting bypass circuit BP may not be provided.

DESCRIPTION OF SYMBOLS 1 Generator 2, 2a-2n Refrigeration container 12 Control apparatus 100 Refrigeration apparatus 101 Communication line (communication means)
S72, S122, S182 Master container selection means S96 Allowable current value increase means S105, S135, S215 Comparison means S106, S136, S217 Reduction means S216 Means to issue an alarm

Claims (8)

A generator (1) for generating a power supply voltage;
A plurality of refrigeration containers (2a to 2n) that are supplied with a current within the range of the maximum power generation value from the generator (1) and cool the inside of the warehouse,
Each of the refrigeration containers (2a to 2n) includes a refrigeration apparatus (100) that is supplied with a current within a range of an allowable current value by the electric power of the generator (1) and adjusts the temperature inside the refrigerator, and its own refrigeration container A control device (12) that calculates a necessary current value necessary for the operation of the refrigeration apparatus (100) of (2a to 2n), and other refrigeration containers (2a to 2n) other than its own refrigeration container (2a to 2n) Communication means (101) for communicating with the control device (12).
At least one of the control devices (12) includes, via the communication means (101) , a total required current value that is a sum of the required current values of a plurality of the refrigeration containers , and the generated maximum current value. Comparison means (S105, S135, S215) for comparing
And the said control apparatus (12) is the said refrigeration apparatus (100) of the said refrigeration containers (2a-2n) in which refrigeration capacity is insufficient when the said electric power generation maximum current value is larger than the said total required current value. A refrigeration container system comprising an allowable current value increasing means (S96) for increasing the allowable current value with respect to the current consumed by the battery.   The allowable current value increasing means (S96) calculates the required current value from the deviation between the set temperature and the internal temperature of the refrigerated container (2), and based on the required current value, The refrigeration container system according to claim 1, wherein the allowable current value is increased.   The control device (12) reduces the required current value of the refrigeration apparatus (100) that can be controlled via the communication means (101) when the total required current value is larger than the maximum power generation current value. Reducing means (S106, S136, S217) for operating the refrigeration apparatus (100) within the allowable current value set based on the reduced required current value. The refrigeration container system according to claim 1 or 2. Each of the control devices (12) in the plurality of refrigerated containers (2) has master container selection means (S72, S122, S182) for selecting a master container,
The master control device (12) comprising the control device (12) of the refrigerated container (2) selected as the master container has the comparison means (S105, S135, S215). The refrigeration container system as described in any one of thru | or 3.   The said control apparatus (12) has a means (S216) which issues an alarm when the said total required electric current value is larger than the said electric power generation maximum electric current value, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Refrigerated container system as described in. The control device (12) has means for setting the allowable current value that regulates the magnitude of the current flowing from the generator (1) to each of the plurality of refrigeration containers (2a to 2n),
The initial allowable current value set at the beginning of the control is changed based on the calculated required current value as the allowable current value. Refrigeration container system. The refrigerated container according to claim 6, wherein the initial allowable current value is a value evenly allocated by dividing the maximum power generation current value by the number of the plurality of refrigerated containers (2a to 2n). system. The control device (12) has means (S216) for issuing an alarm when the total necessary current value is larger than the maximum power generation current value,
And the said control apparatus (12) permits only reduction operation of the said allowable electric current value by the said reduction means (S217), The refrigeration container system of Claim 3 characterized by the above-mentioned.

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