JP2003097871A - Refrigeration unit for land transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize power of a battery in accordance with an actual operating situation in a refrigeration unit for land transportation of a power generator drive type. SOLUTION: This refrigeration unit for land transportation of a power generator drive type is provided with a battery operation control part 9a provided with a basic operation mode in which battery chilling operation using the battery as a power source is conducted within ranges of a set number of times N and for a set time T, and a charge/discharge evaluation operation mode in which an operation extension time Tz for an overcharged part is added to the set time T based on evaluation of charge/discharge balance of the battery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator-driven ground transportation refrigeration system mounted on a land transportation vehicle.

[0002]

2. Description of the Related Art A refrigeration system for land transportation cools a container (cool box) loaded on a vehicle for land transportation such as a truck bed (hereinafter referred to as "refrigeration vehicle") to cool a loaded cargo at a desired low temperature. It is installed in a refrigeration vehicle that is maintained and transported in the form of a refrigerator, and forms a refrigeration cycle in which devices such as a compressor, a condenser unit, and an evaporator unit are connected by a refrigerant pipe, and further, a control unit that performs operation. It is configured to include.

In such a land transport refrigeration system, a direct connection system in which a driving force of a compressor is obtained from a vehicle running engine, a sub-engine system in which a dedicated engine-driven power generator is provided and an electric motor drives the compressor, and There is a system in which power is supplied from a generator driven by a vehicle running engine or a battery of an auxiliary power source to drive an electric compressor or the like (hereinafter, referred to as “generator driving system”).

Among these, the generator-driving refrigeration apparatus for land transportation carries out operation while driving the vehicle running engine in which the generator is driven by electric power supplied from the generator, and the vehicle running engine is stopped. The operation of the state is configured to be performed by the electric power supplied from the battery. Such a generator drive system tends to be adopted as a refrigeration system mounted on a vehicle that frequently repeats running and stopping, such as a refrigerating vehicle for home delivery, from the background of the idling stop promotion in recent years. The above-described cooling operation using the battery as a power source is performed when the internal cold storage temperature does not reach the set value.

Now, the cooling operation (hereinafter
The “battery cooling operation” is normally performed when the internal cold storage temperature does not reach the set value. In such a conventional battery cooling operation, for example, the operation from the exit of the garage to the return of the vehicle equipped with a charged battery is set as one cycle, and the set number N and setting of the battery cooling operation that can be performed in this one cycle are set. The time T is set in advance. That is, during one cycle of the cooling operation, the battery cooling operation can be performed within the set number of times N and the set time T. In other words, the control is performed so as not to exceed the set number of times N and the set time T. Battery cooling operation is in progress.

[0006]

By the way, in the above-mentioned generator-driven refrigeration apparatus for land transportation, battery cooling operation is performed within a preset number of times N and a preset time T. Therefore, the charge amount charged in the battery and the discharge amount actually used in one cycle are not reflected. That is, in the actual cooling operation, the battery is charged via the charger when an excessive amount of power generation occurs while the vehicle is traveling. Further, the electric power (discharge amount) actually consumed in the battery cooling operation is not necessarily constant because it changes depending on the actual operating time, the number of times of operation, and the like. For this reason, although the battery has a sufficient remaining amount, in other words, the battery cooling operation can be performed, it is stopped when the set number of times N and the set time T are exceeded. Is the actual situation.

Therefore, it cannot be said that the battery cooling operation that effectively uses the battery power is carried out, and the cooling performance of the inside of the refrigerator is ensured and cooled even when the vehicle running engine is stopped. Improvements are also required to maintain the temperature inside the refrigerator. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigeration apparatus for land transportation that can effectively use battery power according to actual operating conditions.

[0008]

The present invention adopts the following means in order to solve the above problems. The refrigeration apparatus for land transportation according to claim 1 is mounted on a vehicle for land transportation provided with a cool box for keeping an object to be cooled, and includes a compressor, a condenser, a throttle mechanism and an evaporator to form a refrigeration cycle, In a generator-driven ground transportation refrigeration system configured such that the compressor is driven by a power source supplied from a generator and a battery, a battery cooling operation using the battery as a power source has a preset number N of times.
And the basic operation mode performed within the set time T,
And a charge / discharge evaluation operation mode for evaluating the charge / discharge balance of the battery and adding the operation extension time Tz for the excess charge to the set time T. Is.

According to such a refrigeration apparatus for land transportation,
Since the charge / discharge evaluation operation mode for evaluating the charge / discharge balance of the battery and adding the operation extension time Tz for the excess charge to the set time T is provided, the balance between the actual charge amount and the discharge amount is evaluated to determine the discharge amount. When the charge amount is larger, the battery cooling power can be extended and the battery power can be effectively used.

A refrigeration apparatus for land transportation according to claim 2 is
It is mounted on a land transportation vehicle equipped with a cool box to cool the object to be cooled, and comprises a compressor, a condenser, a throttle mechanism and an evaporator to form a refrigeration cycle, and the compressor is a power source supplied from a generator and a battery. In a generator-driven ground refrigeration apparatus configured to be driven, a basic operation mode in which a battery cooling operation using the battery as a power source is performed within a predetermined set number N and set time T. A battery allowable discharge amount operation mode in which the difference Δt is added when the allowable discharge time calculated from the battery allowable discharge amount is longer than the set time T,
It is characterized in that a battery operation control unit having the above is provided.

According to such a refrigeration apparatus for land transportation,
Since the battery allowable discharge amount operation mode for adding the difference Δt when the allowable discharge time calculated from the battery allowable discharge amount is longer than the set time T is provided, the allowable discharge amount actually held by the battery is assigned to the battery cooling operation. Can be used effectively.

The refrigeration apparatus for land transportation according to claim 3 is
It is mounted on a land transportation vehicle equipped with a cool box to cool the object to be cooled, and comprises a compressor, a condenser, a throttle mechanism and an evaporator to form a refrigeration cycle, and the compressor is a power source supplied from a generator and a battery. In a generator-driven ground refrigeration apparatus configured to be driven, a basic operation mode in which a battery cooling operation using the battery as a power source is performed within a predetermined set number N and set time T. The charge / discharge evaluation operation mode in which the charge / discharge balance of the battery is evaluated and the operation extension time Tz for excess charging is added to the set time T, and the allowable discharge time calculated from the battery allowable discharge amount is set from the set time T. A battery operation control unit having a battery allowable discharge amount operation mode for adding the difference Δt when the difference is large is provided. Is shall.

According to such a refrigeration apparatus for land transportation,
The charge / discharge evaluation operation mode in which the charge / discharge balance of the battery is evaluated and the operation extension time Tz for excess charging is added to the set time T, and the difference Δt when the allowable discharge time calculated from the battery allowable discharge amount is larger than the set time T Since the battery allowable discharge amount operation mode for adding is also provided, the balance between the actual charge amount and the discharge amount is evaluated in addition to the basic operation mode, and when the charge amount is larger than the discharge amount, the battery cooling operation is performed. It is possible to select either one of the operation in which the operating time is extended to effectively use the battery power and the operation in which the allowable discharge amount actually held by the battery is assigned to the battery cooling operation to be effectively used. In this case, it is preferable to provide an automatic operation mode in which the operation extension time Tz and the difference Δt are added to the set time T.
The battery cooling operation can be performed by using the battery power more effectively.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a refrigeration apparatus for land transportation according to the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 in the drawings is a refrigeration vehicle, 2 is a container, 3 is an evaporator unit, 4 is a condenser unit, 5 is a compressor, 6 is high pressure refrigerant pipe, 7 is low pressure refrigerant pipe, 8 is an accumulator, 9 is a control unit, 10 and 1
Reference numeral 1 is a temperature sensor, and 20 is a power supply unit.

An example of the structure (refrigeration cycle) of the refrigeration unit CU for land transportation will be described below with reference to FIG. In this refrigeration unit CU, the compressor 5 compresses the gas refrigerant and supplies it to the condenser unit 4. In case of generator drive system,
The compressor 5 is driven by an electric motor (not shown) that receives power supply from the power supply unit 20. The compressor 5 and the condenser unit 4 are connected by a high-pressure refrigerant pipe 6, and high-pressure gas refrigerant is guided to the condenser unit 4.

The condenser unit 4 is installed at an appropriate place outside the container 2, for example, above the driver's seat of the refrigeration vehicle 1 or below the side wall of the container 2. Capacitor unit 4
A condenser 40 for exchanging heat between the high-pressure gas refrigerant and the outside air is installed inside. The outside air passing through the condenser 40 is introduced into the condenser unit 4 by the operation of the condenser fan 41 driven by the fan motor 41a. The refrigerant condensed and liquefied by the condenser 40 passes through the receiver 42 to separate gas and liquid, and then is supplied to the evaporator unit 3 connected by the refrigerant pipe.

The evaporator unit 3 is installed inside the container 2, generally at the upper end on the driver's seat (vehicle forward direction) side. Inside the evaporator unit 3,
An evaporator 30, an evaporator fan 31, a gas-liquid heat exchanger 32, and an expansion valve 33 are provided. The liquid refrigerant introduced into the evaporator unit 3 is the gas-liquid heat exchanger 3
After passing through 2 to be cooled, it is guided to the expansion valve 33 of the throttle mechanism. The liquid refrigerant passing through the expansion valve 33 is decompressed and supplied to the evaporator 30. The evaporator 30 has a function of exchanging heat between the liquid refrigerant and the circulating air in the refrigerator. In this case, the circulating air in the refrigerator is generated by the operation of the evaporator fan 31 using the fan motor 31a as a drive source.
The air in the refrigerator is sucked and circulated so as to pass through the evaporator 30. The liquid refrigerant that has exchanged heat with the circulating air inside the evaporator in the evaporator 30 evaporates to become a gas refrigerant, while the circulating air inside the refrigerator is deprived of heat of vaporization and cooled.

The inside air thus cooled is circulated inside the container 2 to cool the inside of the container to a desired temperature. Further, the gas refrigerant evaporated in the evaporator 30 passes through the gas-liquid heat exchanger 32 to cool the liquid refrigerant, and then is guided to the accumulator 8 through the low pressure refrigerant pipe 7. Gas and liquid are separated in this accumulator 8, and only the gas refrigerant is sucked into the compressor 5 and compressed again. Hereinafter, the refrigeration cycle of the land transportation refrigeration system is formed by circulating the refrigerant that repeats such a state change through the refrigerant pipe.

Now, the refrigeration unit CU for land transportation described above.
Includes a control unit 9 installed in, for example, a driver's seat to perform various driving operations. The control unit 9 is provided with a battery operation control unit 9a for controlling a battery cooling operation using a battery 24 installed in a power supply unit 20 described later as a power source. Therefore, the control unit 9 can also control the battery cooling operation that effectively uses the battery 24, in addition to various operations such as operation / stop of the refrigeration apparatus for land transportation and setting of the internal temperature.

FIG. 2 shows an example of the configuration of the power supply device 20 in the generator drive system. In the figure, reference numeral 21 is a vehicle running engine, 22 is a generator, 23 is a charging device, and 24 is a battery. The power supply device 20 generates electric power with a generator 22 that obtains a driving force from a vehicle running engine 21 of the refrigeration vehicle 1. The electric power generated by the generator 22 is supplied to the refrigeration unit CU for land transportation and used as electric power for driving the compressor 5 and the like. Further, the electric power generated in excess of the electric power consumption of the refrigeration unit CU for land transportation is charged by the charging device 2 as necessary.
The battery 24 is charged via 3. The battery 24 is
It functions as an auxiliary power supply that supplies electric power to the land transportation refrigeration unit CU when the vehicle running engine 21 is stopped, that is, when the generator 22 cannot generate power.

In the following, the battery operation control unit 9 described above is used.
The control of a will be described with reference to the flowcharts of FIGS. The battery control unit 9a can perform the basic setting of the battery cooling operation in step 1 (hereinafter, abbreviated as "S1"). Here, the set number N of battery cooling operations that can be performed in one cycle operation
And set time T. The set time T in this case is a time per battery cooling operation, but it can be considered as a total time for the set number of times N times.

At S2, the operation mode is selected. The operation modes selectable here include a basic operation mode S10, a charge / discharge evaluation operation mode S30, a battery allowable discharge amount operation mode S50, and an automatic operation mode S70.

In the basic operation mode S10, as shown in FIG. 5, it is determined whether or not the vehicle running engine 21 is stopped in the first step S11. That is, since the basic operation mode S10 is intended for the case where the power cannot be supplied from the generator 22, the subsequent steps are prevented from being performed when the power can be generated by the generator 22.

If it is determined in S11 that the vehicle running engine 21 is stopped (YES), the process proceeds to the next S12, in which it is determined whether the internal cold storage temperature has reached the set value. That is, since it is premised that the battery cooling operation is performed when the internal cold storage temperature has not reached the set value, the cooling operation is stopped if it is determined that the internal cold storage temperature has reached the preset value (YES). (S13). It should be noted that the cooling operation may be performed in order to maintain the internal temperature even when the internal temperature reaches the set value.

If it is determined in S12 that the internal temperature has not reached the set value (NO), the process proceeds to S14 and the number of times n the battery cooling operation is performed is checked. Regarding the number of times n, for example, a counter may be provided and the value counted for each cycle may be checked.

If the number of times n is greater than the set number of times N (n> N) in S14, the cooling operation is stopped in S13 and the cooling operation is stopped. That is, since the battery cooling operation of the set number N has already been completed, no further operation is performed. On the other hand, the number n is smaller than the set number (NO)
In this case, the process proceeds to S15 and the battery cooling operation time t is checked.

In step S15, the time t is less than or equal to the set time T (t≤
If T), the process proceeds to S16 and the battery cooling operation is performed until the set time T is exceeded. When the time t becomes equal to or longer than the set time T (NO), the process proceeds to S13 and the cooling operation is stopped. Such a cooling operation stop (S13) is canceled by restarting the operation of the vehicle running engine 21.

Next, the case where the charge / discharge evaluation operation mode S30 is selected will be described. The charging evaluation operation mode S30 is started by proceeding to (* 1) together with S14 when the internal cold storage temperature does not reach the set value (NO) in S12 of the basic operation mode S10. That is, the charging / discharging evaluation operation mode S30 is selected and is started when the condition for performing the battery cooling operation is satisfied.

In S31, the charging time is sampled. Then, based on this sampling result, S32
Then, the charge amount is calculated. On the other hand, in S33, the discharge amount is calculated and is sent to S34 together with the charge amount calculated in S32. In S34, the charge / discharge amount is compared, and if the charge amount is larger than the discharge amount (YES), the process proceeds to S35.

In S35, the operation extension time Tz is calculated from the battery capacity obtained by calculating (charge amount-discharge amount). This operation extension time Tz is added to the set time T in S36, and a new set time T1 (T1 = T +
Tz) is obtained. In S37, the set time T is corrected to the new set time T1, and the process proceeds to (* 2) in FIG.

As a result, if the number n of battery cooling operations checked in S14 of FIG.
The battery cooling operation time t checked in 15 is compared with the new set time T1. That is, since the new set time T1 is longer than the set time T in the operation extension time Tz, the cooling operation that effectively uses the battery power can be performed. In other words, the battery cooling operation time can be extended in consideration of the charge amount. If the amount of discharge is larger than the amount of charge in S34, the process proceeds to S38 to store the preset sampling frequency data and store it in S31.
Further, the set time T is left as it is without correction in S39.

In the following, a concrete balance evaluation example will be shown for the charge / discharge evaluation operation mode S30 described above. Here, the running (charging) time of the vehicle running engine 21 is set to 1
0 minutes, stop time of the vehicle running engine 21 is 5 minutes,
Of these, the calculation is performed when the battery is cooled for 2 minutes and discharged. The battery capacity is 7.2A
h, and the charging current is 2A.

As for the charge amount in this case, the percentage of the battery capacity is calculated by the following formula.

[Equation 1] That is, 4.63% of the battery capacity of 7.2 Ah is charged.

Next, the discharge amount is calculated. 30Hz
Power consumption is 1230W and voltage is 2 when driving for 2 minutes
If it is set to 45 V, the current consumption at this time is 1230 (W) ÷ 245 (V) ≈5.02 (A).

Therefore, the discharge amount is calculated as a percentage of the battery capacity by the following formula.

[Equation 2] That is, 2.32% of the battery capacity of 7.2 Ah has been discharged.

From the above calculation results, the balance evaluation of discharge is carried out by the following formula. Although the number of samplings is 1 here, any number can be set. Balance evaluation = (charge amount-discharge amount) ÷ sampling number = (4.63-2.32) ÷ 1 ≈ 2.31 (%)

That is, since the charge amount is 2.31% larger than the discharge amount in percentage with respect to the battery capacity of 7.2 Ah, this excess charge amount can be set as the extended operation time Tz.

Therefore, the extended operation time Tz is calculated by the following formula. Tz = excessive charge amount × (battery capacity ÷ current consumption) = 0.0231 × ((7.2 × 60) ÷ 5.02) ≈1.99 (minutes)

As a result, the new set time T1 is T + T
Since z = 2 + 1.99, T1 = 3.99 (minutes), which can be extended to approximately twice T.

Subsequently, the battery allowable discharge amount operation mode S
The case where 50 is selected will be described. In this battery allowable discharge amount operation mode S50, the internal cold storage temperature does not reach the set value in S12 of the basic operation mode S10 (N
In the case of O), it is started by proceeding to (* 1) with S14. That is, the battery allowable discharge amount operation mode S50 is selected and is started when the condition for performing the battery cooling operation is satisfied.

In S51, the number n of battery cooling operations is counted. In the next S52, the average number of times of operation per unit time is calculated from the number of times n counted in S51. Furthermore, in S53, the total number of operations in one cycle (average number of operations x 1
Cycle operating time) is calculated and estimated.

In subsequent S54, one permissible discharge amount is calculated from the total number of operations estimated in S53. And S5
In 5, the one permissible discharge time T2 is calculated from the one permissible discharge amount obtained in S54. The allowable discharge time T2 obtained in S55 is compared with the set time T in S56. As a result, if T <T2, the process proceeds to S57 (T
2-T) calculates the difference Δt. And the set time T
Is corrected to a new set time T2, and the process proceeds to (* 2) in FIG.

As a result, if the number n of battery cooling operations checked in S14 of FIG.
The battery cooling operation time t checked in 15 is compared with the new set time T2. That is, since the new set time T2 is longer than the set time T by the difference Δt, the cooling operation that effectively uses the battery power can be performed. In other words, the battery cooling operation time can be extended in consideration of the charge amount. In addition, in S56, T2
If is less than or equal to the set time T, the process proceeds to S58 and no correction is made, and the set time T is left as it is.

The battery allowable discharge amount operation mode S50 described above will be described below with reference to a specific example. In this operation mode, the basic idea is to allocate all the allowable battery discharge power to the battery cooling operation. Here, if the number of battery cooling operations per unit time (1 hour) calculated in S52 is 3 and the operation time for one cycle (one day) is 6 hours, the total number of operations in one cycle calculated in S53 Will be 18 times.

When the battery 24 can be discharged up to 50% of the battery capacity, the permissible discharge amount for one time is calculated as follows (S54). Permissible discharge amount per time = Permissible discharge amount of battery ÷ total number of operations = 50 (%) ÷ 18 (times) ≈ 2.78 (% / times)

Next, the permissible discharge time T2 is calculated from the permissible discharge amount once. The battery capacity is 7.2 Ah, 3
When the power consumption when operating for 2 minutes at 0 Hz is 1230 W and the voltage is 245 V, the current consumption at this time is 1230 (W) ÷ 245 (V) ≈5.02 (A).

Then, the allowable discharge time T2 is obtained by the following mathematical formula.

[Equation 3]

Therefore, the difference Δt between the allowable discharge time T2 and the set time T is 0.39 from Δt = 2.39-2.
Minutes (S57). That is, the battery cooling operation that is extended by 0.39 minutes from the preset time T set in S1 becomes possible.

Finally, the case where the automatic operation mode 70 is selected will be described. In addition to the basic operation mode described above, the automatic operation mode S70 automatically adds the extension time Tz and the difference Δt calculated in the charge / discharge evaluation operation mode S30 and the battery allowable discharge amount operation mode S50 to the set time T to perform automatic operation. The purpose is to extend the battery cooling operation time.

In S71, the extension time Tz input in S35 and the difference Δt input in S57 are set to the set time T.
And the set time T3 is calculated. This set time T3
Is corrected as a new set time in place of the set time T in the next S72, and thereafter, the process proceeds to (* 2) in FIG. As a result, the operating time of the battery cooling operation is (Tz + Δt)
Since it is possible to extend only the charge / discharge evaluation operation mode S30 or the battery allowable discharge amount operation mode S50.
As compared with the case where either one of them is used alone, the battery power can be used more effectively according to the actual operating state.

In the embodiments described so far, the basic operation mode S10, the charge / discharge evaluation operation mode S30, the battery allowable discharge amount operation mode S50, and the automatic operation mode S70.
, So that you can choose any one,
In another embodiment, a combination of the basic operation mode S10 and the charge / discharge evaluation operation mode S30, a combination of the basic operation mode S10 and the battery allowable discharge amount operation mode S50, or a combination of the basic operation mode S10 with the charge / discharge evaluation operation mode S3.
0 and the battery allowable discharge amount operation mode S50 may be combined so that either the charge / discharge evaluation operation mode S30 or the battery allowable discharge amount operation mode S50 can be selected.

The structure of the present invention is not limited to the above-described embodiment, and the structure of the refrigeration cycle is not limited to that shown in the drawings and may be appropriately modified within the scope of the present invention. You can

[0053]

According to the above-mentioned refrigeration apparatus for land transportation of the present invention, the following effects can be obtained. The refrigeration apparatus for land transportation according to claim 1 evaluates a basic operation mode in which a battery cooling operation using a battery as a power source is performed within a predetermined set number N and a set time T, and a charge / discharge balance of the battery. Then, the operation extension time T for the excess charging is added to the set time T.
Since the battery operation control unit including the charge / discharge evaluation operation mode for adding z is provided, the balance between the actual charge amount and the discharge amount is evaluated, and when the charge amount is larger than the discharge amount, the battery It is possible to extend the operation time of the cooling operation and effectively use the battery power. Therefore, as compared with the case of operating within the range of the preset set time, the battery power can be effectively used according to the operating state of the refrigerating apparatus, and the cooling performance can be improved.

The refrigeration apparatus for land transportation according to claim 2 is
When the battery cooling operation using the battery as a power source is performed within a preset number of times N and set time T, and when the allowable discharge time calculated from the battery allowable discharge amount is greater than the set time T, the difference Δt Since the battery operation control unit provided with the battery allowable discharge amount operation mode for adding is added to the battery discharge operation mode, the allowable discharge amount actually held by the battery is allocated to the battery cooling operation for effective use. The practicable time can be extended. Therefore, as compared with the case of operating within the range of the preset set time, the battery power can be effectively used according to the operating state of the refrigerating apparatus, and the cooling performance can be improved.

A refrigeration apparatus for land transportation according to claim 3 is
A basic operation mode in which a battery cooling operation using a battery as a power source is performed within a range of a preset number of times N and a preset time T, and a charge / discharge balance of the battery is evaluated to extend the operation for an excess charge during the preset time T. When the charge / discharge evaluation operation mode in which the time Tz is added and the allowable discharge time calculated from the battery allowable discharge amount is longer than the set time T, the difference Δt
Since the battery operation control unit having the battery allowable discharge amount operation mode for adding, is provided, the charge / discharge evaluation operation mode is selected, the balance between the actual charge amount and the discharge amount is evaluated, and When the charge amount is large, it is possible to extend the operation time of the battery cooling operation and effectively use the battery power.

If the battery allowable discharge amount operation mode is selected, the allowable discharge amount actually held by the battery can be allocated to the battery cooling operation for effective use, and the feasible time of the battery cooling operation can be extended. it can. Therefore, in addition to the basic operation mode, it becomes possible to select the charge / discharge evaluation operation mode or the battery allowable discharge amount operation mode according to the operation situation, and the battery power consumption is lower than that in the case of operating within the range of the preset set time. Can be used more effectively according to the operating state of the refrigeration system, and the cooling performance can be improved.

In this case, the operation extension time Tz and the difference Δt
By providing the automatic operation mode in which the battery charge is added to the set time T, the battery power can be more effectively utilized automatically, and the battery cooling operation with improved cooling performance can be implemented.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a refrigeration apparatus for land transportation according to the present invention.

FIG. 2 is a power supply unit (generator drive system) in FIG.
It is a figure which shows the structural example.

FIG. 3 is a perspective view showing a truck equipped with a refrigeration device for land transportation.

FIG. 4 is a flowchart showing an operation mode selection in the battery operation control unit.

FIG. 5 is a flowchart of a basic operation mode.

FIG. 6 is a flowchart of a charge / discharge evaluation operation mode.

FIG. 7 is a flowchart of a battery allowable discharge amount operation mode.

FIG. 8 is a flowchart of an automatic operation mode.

[Explanation of symbols]

1 frozen car 2 containers 3 Evaporator unit 4 Capacitor unit 5 compressor 9 control unit 9a Battery operation control unit 20 power supply 21 Vehicle running engine 22 generator 23 Charger 24 battery 30 evaporator 33 Expansion valve (throttle mechanism) 40 capacitors

Claims (4)

[Claims] 1. A compressor, a condenser, which is mounted on a land transportation vehicle equipped with a cool box for keeping an object to be cooled.
In a refrigerating apparatus for land transportation of a generator drive type, which is configured to include a throttle mechanism and an evaporator to form a refrigeration cycle, and in which the compressor is driven by a power source supplied from a generator and a battery. A basic operation mode in which a battery cooling operation as a power source is performed within a range of a preset number of times N and a preset time T, and a charge / discharge balance of the battery is evaluated, and an operation extension time for an excess charge in the preset time T is evaluated. A refrigeration apparatus for land transportation, comprising: a battery operation control unit including: a charge / discharge evaluation operation mode for adding Tz; 2. A compressor for mounting a compressor, a condenser, mounted on a land transportation vehicle equipped with a cool box for keeping an object to be cooled.
In a refrigerating apparatus for land transportation of a generator drive type, which is configured to include a throttle mechanism and an evaporator to form a refrigeration cycle, and in which the compressor is driven by a power source supplied from a generator and a battery. A basic operation mode in which a battery cooling operation as a power source is performed within a preset number of times N and a preset time T, and a difference Δt is added when the allowable discharge time calculated from the battery allowable discharge amount is larger than the set time T. A refrigeration apparatus for land transportation, which is provided with a battery operation control unit including: 3. A compressor, a condenser, which is mounted on a land transportation vehicle equipped with a cool box for keeping an object to be cooled.
In a refrigerating apparatus for land transportation of a generator drive type, which is configured to include a throttle mechanism and an evaporator to form a refrigeration cycle, and in which the compressor is driven by a power source supplied from a generator and a battery. A basic operation mode in which a battery cooling operation as a power source is performed within a range of a preset number of times N and a preset time T, and a charge / discharge balance of the battery is evaluated, and an operation extension time for an excess charge in the preset time T is evaluated. A battery operation control unit comprising: a charge / discharge evaluation operation mode for adding Tz; and a battery allowable discharge amount operation mode for adding a difference Δt when the allowable discharge time calculated from the battery allowable discharge amount is larger than the set time T. A refrigeration apparatus for land transportation, characterized by being provided with. 4. The operation extension time Tz and the difference Δ
The refrigerating apparatus for land transportation according to claim 3, wherein an automatic operation mode for adding t to the set time T is provided.