JP2003097873A - Operation method for refrigeration unit for land transportation, and refrigeration unit for land transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation method for a refrigeration unit for land transportation, and a refrigeration unit for land transportation. SOLUTION: A relay box 26 is provided in a circuit connected to a battery 5. The relay box 26 is connected so that power of the battery 5 is used as power for driving a compressor 25 in cooperation with a power supply source of another line based on input of at least one of a signal outputted when temperature difference between a set temperature and an inner temperature is more than a prescribed value, a signal outputted when power generation quantity of a power generator 7 is lower than power consumption of the compressor 25, a signal outputted from a switch 11a provided on a controller 11, and a signal outputted when traveling load of a vehicle is large. A solar battery 6 is installed at an upper surface of the vehicle to further compose a power supply source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating a refrigeration apparatus for land transportation used in a vehicle for land transportation and a refrigeration apparatus for land transportation.

[0002]

2. Description of the Related Art Generally, a refrigerating apparatus for land transportation is used for a vehicle for land transportation for carrying frozen food, fresh food, etc. (hereinafter referred to as "luggage"), and a cooling device for storing luggage loaded in the vehicle. It cools the inside of the refrigerator. The refrigeration apparatus for land transportation comprises a compressor, a condenser unit, an evaporator unit, and a controller for operation, and constitutes a refrigeration cycle connected by a refrigerant pipe.

FIG. 4 is a diagram showing the overall construction of a refrigeration apparatus for land transportation mounted on a vehicle. As shown in FIG. 4, reference numeral 1 is a vehicle, 2 is a cooling box, 3 is an evaporator unit, 4
Indicates a capacitor unit. The refrigeration system for land transportation is a device for cooling the inside of the cooling box 2 mounted on the loading platform of the vehicle 1.

This refrigerating apparatus for land transportation has a construction in which a condenser unit 4 installed outside the refrigerating compartment 2 and an evaporator unit 3 installed inside the refrigerating compartment 2 are connected by a refrigerant pipe (not shown). ing. The condenser unit 4 may be located on the upper front side surface of the cooling compartment 2 as shown in the figure, or may be installed on the chassis portion of the vehicle 1 below the cooling compartment 2. Also,
The battery is installed in the lower part of the refrigerator 1 (not shown). This battery is exclusively used for operating the refrigeration apparatus for land transportation, and is installed when a generator described later is provided.

There are two types of refrigeration systems for land transportation: a system in which a driving force of a compressor is obtained from a vehicle running engine, and a system in which a generator for driving and generating electricity by a vehicle running engine is provided and an electric motor drives the compressor. . In addition,
A compressor driven by an electric motor is an electric compressor (hereinafter referred to as "compressor"). The compressor is generally installed in the engine room in the case of a system for obtaining drive from the vehicle running engine, and in the condenser unit 4 in the case of a system for driving and generating electricity in the vehicle running engine or It is often installed in a separate box (not shown).

A description will be given of a case of a system in which a generator for driving and generating electricity is provided by a vehicle running engine and a compressor is driven by an electric motor. The electric power for driving the compressor is supplied from a generator that obtains an engine output of the vehicle and generates electric power while the vehicle 1 is traveling. Also,
When the vehicle 1 is stopped, in consideration of problems such as noise and exhaust gas, the engine is stopped and power is supplied from a commercial power source. Further, even when the vehicle is stopped, if the commercial power source cannot be used, the battery is supplied from the battery provided in the vehicle 1.

As described above, one of the generator, the battery, and the commercial power source is selected and supplied as electric power for driving the electric compressor. And when the amount of power generated by the generator is small, switch to the power of the battery and use it.
When commercial power is connected, this power is used to drive the compressor. In other words, the power supply source with the highest power supply capacity is selected and selected to support the cooling operation with high load (rapid cooling operation) as much as possible.
One electric power was used to operate the refrigeration equipment for land transportation.

[0008]

However, in the above-mentioned conventional refrigeration apparatus for land transportation, since one of a plurality of power supply sources is selected and operated, rapid cooling is required when it is desired to quickly cool the inside of the refrigerator. During operation, the limit of electric power required for this operation was immediately reached, and the expected cooling performance was not obtained.

In the case of operating with the electric power from the generator, the amount of power generation is small at the idle speed of the engine, so that the electric power becomes insufficient and the rapid cooling operation cannot be performed. For this reason, even if the power supply source is switched to the electric power of the battery stored earlier, it is difficult to perform the rapid cooling operation with the electric power stored in the battery. Because
Generally, a battery is used as a preliminary battery and is installed in a vehicle, so it does not have a large capacity.
This is because a large amount of power cannot be output.

Similarly, since the capacity of the battery is small, the battery will immediately fall into a power shortage under the condition that the heat load is large such as when the outside air temperature is high. Furthermore, the environment surrounding the battery at a high outside air temperature is poor, and the performance of the battery is deteriorated by being exposed to a high temperature state. Therefore, the cooling performance is deteriorated due to the lack of electric power, and it is difficult to maintain the temperature inside the refrigerator.

Further, in the system in which the compressor is driven by the vehicle running engine, the compressor driving force cannot be sufficiently obtained at the idle speed of the engine, so that the cooling performance required for the rapid cooling operation cannot be obtained. It was

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for operating a refrigeration apparatus for land transportation and a refrigeration apparatus for land transportation with improved cooling performance.

[0013]

The present invention adopts the following means in order to solve the above problems. The invention according to claim 1 includes a plurality of power supply systems, and a compressor driven by electric power from at least one of these power supply systems,
In a method of operating a refrigeration apparatus for land transportation, which performs a cooling operation with a heat exchanger that cools the inside of a vehicle by using a refrigerant compressed by the compressor, when cooling the inside of the refrigerator, It is characterized in that a combined battery operation is performed in which the compressor is driven at a high rotation speed with electric power obtained by combining electric power of one generator or electric power of a commercial power supply and electric power of a battery which is one of the power supply systems. .

The compressor is supplied with electric power obtained by combining the electric power from the generator and the electric power from the battery, and the electric power drives the compressor.
In addition, a case is also included in which electric power obtained by combining the electric power from the commercial power source and the electric power from the battery is supplied, and the compressor is driven by this electric power. Therefore,
The driving force of the compressor is increased and more refrigerant is compressed. Then, this refrigerant exchanges heat with the air in the refrigerator in the heat exchanger.

According to a second aspect of the present invention, in the operating method for the refrigeration apparatus for land transportation according to the first aspect, the condition for performing the battery combined operation is that the internal temperature is higher than the preset temperature set by the user. It is characterized in that the temperature difference between the set temperature and the internal temperature is set to a predetermined value or more.

When it is determined that the temperature inside the refrigerator to be cooled is higher than the set temperature and the temperature difference between the set temperature and the temperature inside is determined to be a predetermined value or more, the electric power of the generator or the electric power of the commercial power source and the battery. Combined with the electric power of, the battery combined operation to drive the compressor is performed. When the predetermined value of the temperature difference between the internal temperature and the set temperature is, for example, 5 ° C, the battery combined operation using two electric powers is performed in the case of 5 ° C or more, and the conventional operation is performed in the case of 2 ° C. It is preferable to perform normal operation using one electric power.

According to a third aspect of the present invention, in the operating method for the refrigeration apparatus for land transportation according to the first or second aspect, the condition for performing the battery combined operation is that the power generation amount of the generator is equal to that of the compressor. It is characterized in that the power consumption is lower than the power consumption.

That is, in a situation where the power from the generator is supplied to the compressor, if the power generation amount of the generator does not reach the power required for the compressor during the cooling operation, the power of the generator and the power of the battery. Therefore, the compressor will be driven by the combined electric power for cooling operation.
For example, when the engine is at the idle speed, the generated electric power is small, so that the electric power stored in the battery is supplied and the two electric powers are combined to drive the compressor. This increases the driving force of the compressor and compresses the refrigerant more.

According to a fourth aspect of the present invention, in the operating method of the refrigeration apparatus for land transportation according to any one of the first to third aspects, the condition for performing the battery combined operation is when the user gives an instruction. It is characterized by being.

When the user gives an instruction to operate in combination with the battery, this instruction command is output, and in accordance with this instruction, the cooling operation is performed by using the electric power of the generator or the electric power of the commercial power source and the electric power of the battery. Will be performed.

According to a fifth aspect of the present invention, in the operating method of the refrigeration apparatus for land transportation according to any of the first to fourth aspects, the condition for performing the battery combined operation is that the running load of the vehicle is It is characterized as being large.

Usually, the cooling operation during traveling often depends on the electric power supplied from the generator. Therefore, when the vehicle is running, the load of the generator acts on the engine side.
When the running load that requires a large amount of power on the engine side is large (for example, when climbing or accelerating), this is judged and the power of the battery is added to the cooling operation to determine the amount of power generated by the generator. Therefore, the load on the engine side due to the generator will be reduced. As a result, the output of the engine is largely distributed to the driving force for traveling, and the traveling performance of the vehicle provided with the refrigeration device for land transportation is improved. In this case, since the vehicle is running, the electric power from the commercial power source is not supplied, and the electric power from the generator and the electric power from the battery are used together.

According to a sixth aspect of the present invention, there is provided a vehicle-mounted electric generator for generating electric power with an engine, a power supply device for inputting a commercial power source, and a battery for storing the commercial power source or the electric power obtained by the electric power generator. In a land transportation refrigeration system that drives a compressor with electric power supplied from at least one of the above to compress a refrigerant and perform a cooling operation toward a set temperature set in a controller, which is connected to the battery. A circuit switchgear is provided in the circuit,
The circuit switchgear outputs a signal that is output when the temperature difference between the set temperature and the in-compartment temperature exceeds a predetermined value, and outputs when the power generation amount of the generator is less than the power consumption of the compressor. A circuit that is connected when at least one of a signal that is output from a switch provided in the controller and a signal that is output when the vehicle has a heavy running load is input. To do.

A circuit for connecting the compressor to the circuit for supplying the power from the generator to the compressor or the circuit to supply the power from the commercial power source to the compressor and the circuit for supplying the power from the battery to the compressor. Will be connected in the middle of. Then, the circuit switchgear is provided in the middle of the circuit from the battery. By inputting a signal to the circuit switchgear, the circuit connected to the battery is connected to the compressor, and the electric power stored in the battery is supplied to the compressor together with the electric power from the generator or the commercial power source. The signal input to the circuit switchgear occurs when at least one of the following conditions is determined. 1) The temperature inside the refrigerator to be cooled is higher than the set temperature,
Further, when the temperature difference between the set temperature and the internal temperature is set to a predetermined value or more. 2) The amount of power generated by the generator is less than the power consumption of the compressor and the necessary power cannot be supplied, in other words, when cooling operation with a high load is performed. 3) When the user desires to switch on the controller. 4) When the running load that requires a large amount of power on the engine side is large. If any one of these conditions is satisfied, a signal for connecting the circuit is output to the circuit switchgear, and the battery combined operation is performed.

According to a seventh aspect of the present invention, in the refrigeration apparatus for land transportation according to the sixth aspect, a condenser that exchanges heat between the refrigerant compressed by the compressor and the outside air, and air is blown to the condenser. A condenser fan is provided, and an evaporator that exchanges heat between the air in the refrigerator and the refrigerant, and an evaporator fan that blows air to the evaporator are provided, and at least one of the condenser fan and the evaporator fan is the circuit switchgear. It is characterized in that it is connected to a circuit of electric power supplied via.

The electric power of the generator or the commercial power source and the electric power of the battery are combined to drive the compressor, whereby the refrigerant is compressed more. At this time, since the circulation amount of the refrigerant increases, more refrigerant enters the evaporator and the condenser, and heat exchange between the air and the refrigerant is promoted. At least one of the evaporator fan and the condenser fan is driven by two electric powers, that is, the electric power of the generator or the commercial power source and the electric power of the battery, and thus at least one of the fans is rotated at a higher speed than usual by the two electric powers. It will maintain and blow more air. Therefore, according to the increased circulation amount of the refrigerant, more air is passed through the evaporator or the condenser to promote heat exchange.

The invention described in claim 8 is the refrigeration apparatus for land transportation according to claim 6 or 7, wherein a solar cell is provided on the upper surface of the vehicle.

A solar cell uses a semiconductor mainly composed of silicon and utilizes the photoelectric effect of a pn junction to convert solar energy into electric power. The battery can be charged by connecting the electric power obtained from the solar cell to the battery, for example. In this case, the electric power from the solar cell is stored in the battery to supplement the electric power used in the battery combined operation and the normal cooling operation by the battery electric power. Further, this electric power may be directly used for driving the compressor or for driving the evaporator fan and the condenser fan.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing the overall configuration of a refrigeration apparatus 1 for land transportation of this embodiment.
In FIG. 1, reference numeral 1 is a refrigeration vehicle (vehicle), 2 is a container-type refrigerator, 3 is an evaporator unit, 4 is a condenser unit, 5 is a battery, 6 is a solar cell installed on the upper surface of the refrigerator 2, 7 Indicates a generator attached to the engine 10.

The condenser unit 4 installed outside the cooler 2 and the evaporator unit 3 installed inside the cooler 2 are connected by a refrigerant pipe (not shown). Further, the condenser unit 4 is located on the upper front side surface of the cooling box 2 as shown in the figure,
The evaporator unit 3 and the cooling unit 2 are opposed to each other with the wall surface of the cooling unit 2 interposed therebetween. A motor pack 8, a control box 9 and a battery 5 are installed in a chassis 1a portion of the vehicle 1 which is a lower part of the cooling box 2, and the motor pack 8 is provided with an electric compressor (compressor) (not shown) driven by an electric motor. . Behind the motor pack 8, there is a control box 9, which is configured with controllers (not shown), converters (responsible for voltage conversion), relays, etc. in the refrigeration apparatus for land transportation.

Further, in the room of the cab 1b, the controller 1 for the user to monitor and adjust the operation of the refrigerating apparatus for land transportation.
1 is provided and is connected to the control box 9 and the like. The chassis 1a below the cab 1b is provided with an engine 10 for running the vehicle, and a generator 7 is provided side by side with the engine 10. The generator 7 is connected to a pulley (not shown) on the engine 10 side via a belt (not shown) and generates electricity by the power of the engine 10.
The refrigerating apparatus for land transportation shown in the present embodiment is a refrigerating apparatus for land transportation which is provided with a generator 7 for driving and generating electricity by a vehicle running engine to drive an electric compressor.

Now, the configuration of the electric circuit in the cooling operation of such a refrigerating apparatus for land transportation will be described. FIG. 2 is a circuit diagram illustrating a schematic configuration of a circuit of the refrigeration apparatus for land transportation in the present embodiment. Reference numeral 20 denotes an electric power system, which includes the above-described power generator 7, a controller 22 that controls the power generator 7, and controls the voltage. This power system 2
A commercial power source 21 can be connected to 0, and external power is supplied at the time of connection. The power system 20 is connected to the power conversion device 24, and further, the power conversion device 24.
An electric compressor 25 (compressor) is provided on the output side of. It is preferable that the power conversion device 24 uses an inverter that can change the voltage and the AC frequency.

A circuit connected to the battery 5 is connected to the power conversion device 24 via the charging device 27, and a controller 22, a relay box 26 (circuit switching device), and a charging device 27 are connected up to the battery 5. Is provided. Regarding the positional relationship between the relay box 26 and the charging device 27, the charging device 27 is connected to the battery 5 side. Further, the solar cell 6 provided on the upper surface of the cooling compartment 2 of the vehicle 1 shown in FIG. 1 is also provided as one component of the power system in the same manner. The power of the solar cell 6 is the charging device 2
7, the voltage is converted to the specified voltage of the battery 5 and charged.

A fan motor or the like 30 (condenser fan, evaporator fan) provided inside the condenser unit 4 (see FIG. 1) or the evaporator unit 3 (see FIG. 1) is connected to the power system 20 via the power converter 24. Connected with.

The power converter 24 includes a controller 11
Are connected. Further, a direct circuit connecting the controller 11 to the power conversion device 24 is formed.
Then, the controller 11 is connected to a relay box 26 in a circuit connected to the battery 5 by a signal line, and can output a signal to the relay box 26.

Next, the flow of electric power for driving the electric compressor 25 will be described. When electric power is supplied from the generator 7 or the commercial power source 21, the electric power is once supplied to the controller 2
Enter 2. The controller 22 converts the input power into DC power and outputs it to the power converter 24. Then, the electric power output from here is converted into the specified voltage of the fan motor or the like 30 and output to the fan motor or the like 30. As a result, the fan motor or the like 30 is driven. In addition, the electric power of the generator 7 or the commercial power source 21 may be sent to the charging device 27 to be converted into a voltage and then charged in the battery 5.

When there is no power supply from the commercial power source 21 and the generator 7, the power stored in the battery 5 enters the relay box 26, and when the relay of the relay box 26 is connected, it goes toward the power converter 24. Power is supplied.

The power converter 24 converts the input DC power into AC power whose voltage and frequency are changed,
Output to the electric compressor 25. When the power conversion device 24 changes the frequency of the alternating-current power, the drive frequency of the electric compressor 25 is changed and the compression amount of the refrigerant is changed.

The frequency of the AC power output from the power converter 24 is changed by the signal from the controller 11. The controller 11 outputs a signal output based on the result of the user's adjustment of driving, a signal calculated by a temperature sensor (not shown), or the like. Then, this signal is input to the power conversion device 24, and the conversion value of the voltage and frequency of the power input to the power conversion device 24 is determined according to this signal. That is,
The output of the signal from the controller 11 determines the refrigerant compression amount in the electric compressor 25.

Now, the relay box 26 in the circuit connected to the battery 5 will be described. In this embodiment, the power of the battery 5 can be supplied to the power converter 24, that is, the electric compressor 25 even when the power is supplied from the generator 7 or the commercial power supply 21. The power supply method described below mainly describes power supply from the generator 7.

When the refrigerating vehicle 1 is running or when the refrigerating vehicle 1 is stopped (the engine is driving), electric power is supplied from the generator 7 to the refrigerating apparatus for land transportation. In such a case, the electric power stored in the battery 5 can be added and sent to the electric compressor 25, so that the drive of the electric compressor 25 can be maintained at a high rotation speed.
As a result, the compression amount of the refrigerant is increased and the cooling performance is improved, that is, the rapid cooling operation can be performed. The rapid cooling operation is a battery combined operation in which the electric power of the battery 5 is added to the electric power of the generator 7. Of course, it is also possible to use the power of the commercial power supply 21 and the power of the battery 5 together.

In a state where electric power is being supplied from the controller 22 to the electric power converter 24, the relay box 26 connects the circuits according to an instruction from the controller 11 or other conditions. Then, the electric power stored in the battery 5 is supplied from the controller 22 to the circuit connected to the power conversion device 24 via the relay box 26. As a result, the power of the battery 5 is added to the power from the generator 7, and the two powers are combined so that the power conversion device 24,
Further, it is supplied to the electric compressor 25. The operating conditions of the relay box 26 are the following conditions, and the cooling operation using the battery 5 together is performed under these conditions. Note that the battery combined operation has a higher cooling capacity than the conventional normal operation in which the compressor 25 is driven by using the electric power supplied from one power supply system, and thus is described as a rapid cooling operation capable of a rapid temperature decrease. To do.

A method of operating the rapid cooling operation (battery combined operation) will be described with reference to FIG. Note that FIG. 3 is a flow chart showing the operating method of the rapid cooling operation. Since the rapid cooling operation uses the electric power of the battery 5, it is necessary to constantly monitor the electric power in the battery 5. This is because the allowable discharge amount of the battery 5 is set, and if the battery 5 is discharged too much, the life of the battery 5 may be shortened or the performance may be deteriorated. Further, when the refrigeration vehicle 1 is stopped and the engine is stopped, it may be necessary to operate the battery 5 alone. Also in this case, it is necessary to store a certain amount of electric power in the battery 5.

There are four conditions for performing the rapid cooling operation. These conditions are shown below. Condition 1: The inside temperature is higher than the set temperature set by the user, and the temperature difference between the set temperature and the inside temperature is a predetermined value or more. The user inputs the set temperature to the controller 11 as the maintenance temperature of the luggage stored in the refrigerator 2. If the set temperature has a large difference from the internal temperature of the cooling compartment 2, it is necessary to quickly cool the inside of the cooling compartment 2, and by deciding this, the rapid cooling operation start is prompted. Since the temperature difference between the set temperature and the internal temperature is used as the criterion for determining the predetermined temperature, the start of the rapid cooling operation can be freely adjusted by this temperature difference. For example, by setting the predetermined value of the temperature difference to 5 ° C., the rapid cooling operation is performed when the temperature difference is 5 ° C. or more, and the rapid cooling operation is performed when the temperature difference is less than 5 ° C. The operation is performed without performing the normal operation.

Condition 2: The amount of power generated by the generator 7 is lower than the power consumption of the electric compressor 25. The amount of power generated by the generator 7 generated by the engine 10 is determined by the rotation speed of the engine 10. However, when the outside air temperature is high and it is desired to make the inside temperature of the cooling compartment 2 significantly lower than the outside air temperature, the load of the cooling operation increases.
This increase in load brings about an increase in power consumption of the electric compressor 25 and requires a large amount of power. When the engine output such as the idling speed is small and the load of the cooling operation is large, the power generation amount of the generator 7 falls below the power consumption of the electric compressor 25. In order to make up for this shortage of electric power, a rapid cooling operation that is a battery combined operation is performed.

Condition 3: When a signal is output from the switch 11a provided in the controller 11. When the user desires to cool the inside of the refrigerating compartment 2 according to the usage situation, the switch 1 provided in the controller 11
By operating 1a, a signal is output to perform the rapid cooling operation. Explaining with reference to FIG. 2, the input signal from the switch 11a enters the controller 11, and the signal from there enters the relay box 26 connected to the battery 5 to prompt the operation of the relay box 26.

Condition 4: When the running load of the vehicle is large. The generator 7 relies on the engine output of the vehicle. At the same time, the engine 10 is under load to rotate the generator 7. When the refrigeration vehicle 1 is running, it is desirable to reduce the load of the engine 10 and output the driving force for running when the running load is large, for example, when climbing a slope. Therefore, by reducing the load of the generator 7, a large amount of engine output is distributed to the traveling side to improve traveling performance.
However, since the amount of power generated by the generator 7 decreases, the ground transportation refrigeration apparatus performs a cooling operation by supplementing the reduced power with the power of the battery 5. This cooling operation is also a battery combined operation using the electric power of the battery 5, and means a rapid cooling operation.

If any one of the above four conditions is satisfied, the rapid cooling operation is performed as step 1. Then, while performing the rapid cooling operation, the allowable discharge amount of the battery 5 is always confirmed in step 2. If the electric power stored in the battery 5 is maintained at the allowable discharge amount or more, the process proceeds to the comparison with the set temperature of step 3, and if the power is less than the allowable discharge amount, the normal operation is performed.

In step 2, when the electric power stored in the battery 5 maintains the allowable discharge amount or more,
It moves to step 3 and it is determined whether the internal temperature has reached the set temperature. Then, when the internal cold storage temperature has reached the set temperature, the operation proceeds to normal operation, and when the internal cold storage temperature has not reached the set temperature, the process returns to step 1 to continue the rapid cooling operation. .

Since the solar cell 6 is provided in the present embodiment, the battery 5 is charged with the electric power obtained here, so that the allowable discharge amount of the battery is kept high. The environment in which the refrigeration apparatus for land transportation performs the rapid cooling operation in which the battery 5 is also used is often in a high outside temperature. In this environment, the electric power generated from the solar cell 6 can be increased, so that the electric power required for cooling can be supplied more.

According to the operation method of the refrigerating apparatus for land transportation and the refrigerating apparatus for land transportation described above, the cooling operation is improved,
That is, the rapid cooling operation can be performed, and the temperature of the package can be maintained and managed quickly. Then, the capacity of the battery 5 and the capacity of the generator can be reduced by the solar cell 6, or the operation time of the rapid cooling operation can be maintained for a long time.

The following configuration may be adopted as a modified example of this embodiment. The rapid cooling operation, which is the battery combined operation, is described as driving the electric compressor 25, the fan motor 30 and the like with electric power obtained by combining the electric power of the generator 7 and the electric power of the battery 5. A combination with the power of the battery 5 is also possible. When the rapid cooling operation by the commercial power supply 21 is difficult, for example, when the power supply capacity for driving the electric compressor 25 is small, the power of the battery 5 is adjusted to this power to improve the cooling performance. Improved driving can be expected. Moreover, although the refrigeration apparatus for land transportation provided with the solar cell 6 has been described, the refrigeration apparatus for land transportation need not necessarily be provided.

[0053]

The method of operating a refrigerating apparatus for land transportation and the refrigerating apparatus for land transportation according to the present invention described above have the following effects. According to the first aspect of the present invention, when the inside of the refrigerator is cooled, the compressor is powered by both the power of the generator or the commercial power source which is one of the power source systems and the power of the battery which is one of the power source systems. Since it is supposed to perform a battery combined operation to drive the engine at a high rotation speed, it is possible to improve the cooling performance and provide a method for operating a refrigeration apparatus for land transportation capable of a cooling operation that causes a rapid temperature decrease. You can

According to the second aspect of the present invention, the condition for performing the battery combined operation is that the internal cold storage temperature is higher than the preset temperature set by the user, and the temperature difference between the preset temperature and the internal cold storage temperature is set to a predetermined value or more. In this case, it is possible to quickly and accurately perform the cooling operation using the battery together so that the internal temperature reaches the set temperature.

According to the third aspect of the present invention, since the condition for performing the battery combined operation is that the power generation amount of the generator is lower than the power consumption of the compressor, the shortage of power can be sufficiently supplemented, For example, the cooling performance can be maintained high even when the output of the engine is low.

According to a fourth aspect of the present invention, the condition for performing the combined battery operation is that the switch 11 provided in the controller.
Since it is said that the signal is output from a, it is possible to immediately respond to the user's desire to quickly cool the inside of the refrigerator.

According to the fifth aspect of the present invention, since the condition for carrying out the battery combined operation is that the traveling load of the vehicle is large, it is possible to appropriately cool the inside of the refrigerator while keeping the traveling performance of the vehicle high. You can

According to a sixth aspect of the present invention, a circuit switchgear is provided in the circuit connected to the battery, and the circuit switchgear comprises:
A signal output when the temperature difference between the set temperature and the internal temperature is a predetermined value or more, a signal output when the power generation amount of the generator is lower than the power consumption of the compressor, and a switch 11a provided in the controller. Connected when at least one of the signal output from the vehicle and the signal output when the vehicle has a heavy running load is input, the battery power can be used together to achieve a significant increase in power, and Even in a situation where cooling is required, the drive of the compressor can be kept high and the cooling performance can be improved.

In the invention according to claim 7, at least one of the condenser fan and the evaporator fan uses the electric power further supplied from the battery as the driving electric power.
Each fan can be driven according to the compression amount of the refrigerant, and the heat exchange in the condenser and the evaporator can be further increased by increasing the air flow.

According to the eighth aspect of the invention, since the solar cell is provided on the upper surface of the vehicle, the electric power from the solar cell is used to extend the rapid cooling operation for a long time, and the capacity between the battery and the generator is reduced. Can be converted.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram illustrating an entire configuration of a refrigeration vehicle including a refrigeration device for land transportation according to an embodiment of the present invention.

FIG. 2 is a circuit diagram illustrating a schematic configuration of a circuit of a refrigeration apparatus for land transportation according to an embodiment of the present invention.

FIG. 3 is a flow chart showing an operating method of battery combined operation of a refrigeration apparatus for land transportation in an embodiment of the present invention.

FIG. 4 is an overall view illustrating a configuration of a conventional refrigeration apparatus for land transportation.

[Explanation of symbols]

3 Evaporator unit 4 Capacitor unit 5 battery 6 solar cells 7 generator 11 Controller 24 Power converter 25 Electric compressor (compressor) 26 Relay Box (Circuit Switchgear)

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Claims (8)

[Claims] 1. A plurality of power supply systems, a compressor driven by electric power from at least one of these power supply systems, and a heat exchanger that cools the interior of a vehicle by using a refrigerant compressed by the compressors. In a method for operating a refrigeration apparatus for land transportation that performs a cooling operation, when cooling the inside of the refrigerator, power of a generator or commercial power that is one of the power supply systems and one of the power supply systems are used. A method for operating a refrigerating apparatus for land transportation, which is characterized in that battery-combined operation is performed in which the compressor is driven at high rotation speed with electric power combined with electric power of a certain battery. 2. The method for operating a refrigeration apparatus for land transportation according to claim 1, wherein the condition for performing the battery combined operation is that the inside temperature is higher than the set temperature set by the user, and the set temperature and the inside A method for operating a refrigeration apparatus for land transportation, which is characterized in that the temperature difference from the temperature is set to a predetermined value or more. 3. The operating method of the refrigeration apparatus for land transportation according to claim 1, wherein the condition for performing the battery combined operation is that the power generation amount of the generator is lower than the power consumption of the compressor. A method for operating a refrigeration apparatus for land transportation, which is characterized in that 4. The operating method for a refrigeration apparatus for land transportation according to claim 1, wherein the condition for performing the battery combined operation is a case where a user instructs. Operating method of refrigeration equipment for land transportation. 5. The operating method of the refrigeration apparatus for land transportation according to claim 1, wherein the condition for performing the battery combined operation is that the traveling load of the vehicle is large. And a method for operating a refrigeration apparatus for land transportation. 6. At least one of a generator mounted on a vehicle, which generates power by an engine, a power supply device for inputting a commercial power supply, and a battery which stores the electric power obtained by the commercial power supply or the generator. In a land transportation refrigeration apparatus that drives a compressor with supplied electric power to compress a refrigerant and perform a cooling operation toward a set temperature set in a controller, a circuit switchgear is provided in a circuit connected to the battery. Provided, the circuit switchgear is a signal output when the temperature difference between the set temperature and the internal temperature is equal to or more than a predetermined value, when the power generation amount of the generator is less than the power consumption of the compressor Of the signal output from the switch, the signal output from the switch provided in the controller, and the signal output when the traveling load of the vehicle is large, A refrigeration apparatus for land transportation, wherein a circuit is connected when at least one is input. 7. The refrigeration apparatus for land transportation according to claim 6, further comprising a condenser that exchanges heat between the refrigerant compressed by the compressor and the outside air, and a condenser fan that blows air to the condenser. An evaporator that exchanges heat between the internal air and the refrigerant, and an evaporator fan that blows air to the evaporator are provided, and at least one of the condenser fan and the evaporator fan is electric power supplied through the circuit switchgear. Refrigeration equipment for land transportation, characterized in that it is connected to the circuit of. 8. The refrigeration apparatus for land transportation according to claim 6 or 7, wherein a solar cell is provided on an upper surface of the vehicle.