JP2003343959A - Refrigerator for land transportation and vehicle provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the degradation in refrigerating performance when electric power to be supplied becomes insufficient. <P>SOLUTION: When electric power supplied from an electric power supply part is reduced for the amount of electric power required for cooling the inside of a cold reserving vessel, a refrigerator controller outputs the condition to a vehicle control part to increase the amount of electric power outputted from the electric power supply part by the vehicle control part. For this reason, the refrigerator controller is provided with an electric power sensor 10 for detecting the amount P of electric power supplied from the electric power supply part and outputs a demand signal to the vehicle control part when the amount P of supplied electric power is reduced below the required operation electric power to increase the amount of electric power supplied from the electric power supply part. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration apparatus for land transportation and a vehicle equipped with the refrigeration apparatus for land transportation equipped with the refrigeration apparatus.

[0002]

2. Description of the Related Art A refrigerating apparatus for land transportation of this type cools the inside of a cool box mounted on a bed of a vehicle (hereinafter referred to as a "refrigerating vehicle") composed of, for example, a truck and loads the refrigerated box inside. To keep the object to be cooled at a desired low temperature,
In addition to configuring a refrigeration cycle in which devices such as a compressor, a condenser, and an evaporator are connected by a refrigerant pipe, a refrigerating machine controller for performing operation control is provided.

The above refrigeration vehicle includes an internal combustion engine vehicle that runs by an internal combustion engine such as a gasoline engine or a diesel engine, or a so-called hybrid vehicle that runs by combining any one of these engines and a running motor. .

[0004] In the refrigerating apparatus for land transportation mounted on such a refrigerating vehicle, a so-called generator driving method, which is operated by a generator directly connected to an internal combustion engine, and a refrigerating apparatus for a hybrid vehicle are mounted. It is operated by a so-called generator or battery, which is a so-called electric drive system.

[0005]

As described above, the refrigerating apparatus for land transportation is mounted on both a refrigerating vehicle composed of an internal combustion engine and a refrigerating vehicle composed of a hybrid vehicle, but the following problems occur. there were. That is, since the refrigeration apparatus for land transportation mounted on the refrigeration vehicle including the internal combustion engine is configured to receive power from the generator driven by the engine, it depends on the size of the engine speed, Therefore, if the state where the engine speed is low continues, the power supply amount from the generator may decrease. On the other hand, the refrigerating apparatus for land transportation mounted on the refrigerating vehicle composed of the hybrid vehicle is influenced by the electric power state on the vehicle side. Therefore, if the power generation amount of the generator or the charging capacity of the battery is small, it is supplied. There may be a shortage of power. Therefore,
The refrigerating apparatus for land transportation has a problem in that, regardless of the type of refrigerating vehicle, the electric power supplied is insufficient depending on the operating state, and sufficient refrigerating performance cannot be obtained.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the refrigerating capacity from being lowered when the electric power supplied from the vehicle is insufficient. A refrigeration system and a vehicle equipped with a refrigeration system for land transportation are provided.

[0007]

In order to achieve the above object, the present invention proposes the following means. According to the invention of claim 1, a cool box mounted on the vehicle, and a refrigerator that cools the cool box in a predetermined refrigeration cycle by power supply from the power supply section controlled by the vehicle control section of the vehicle. In the refrigeration apparatus for land transportation provided with, when the amount of power supplied from the power supply unit is smaller than the amount of power required to cool the cool box, the power is supplied from the power supply unit until the required amount of power is reached. A refrigerator controller for increasing the amount of electric power is provided.

According to the refrigerating apparatus for land transportation according to the present invention, when the electric power supplied from the electric power supply unit is smaller than the operating electric power required for the refrigerator controller to cool the inside of the cool box, the electric power is reduced. By increasing the amount of electric power supplied from the supply unit, it is possible to prevent the cooling capacity in the cool box from decreasing, and it is possible to perform good cooling in the cool box.

According to a second aspect of the present invention, in the refrigeration apparatus for land transportation according to the first aspect, the refrigerating machine controller has a temperature inside the cold storage higher than a target temperature, and the power supplied from the power supply unit. When the amount is smaller than the amount of electric power required to cool the inside of the cool box to the target temperature, means for requesting the vehicle control unit to increase the amount of electric power of the electric power supply unit until the required amount of electric power is reached. It is characterized by having.

According to the refrigeration apparatus for land transportation according to the present invention, the temperature in the cool box is higher than the target temperature, and the amount of power supplied from the power supply unit is lower than the amount of power required to cool to the target temperature. When it is small, the refrigerator controller requests the vehicle control unit to increase the amount of electric power,
Since the supplied power amount can be reliably increased, good cooling can be performed without lowering the cooling capacity.

According to a third aspect of the present invention, in the refrigeration apparatus for land transportation according to the second aspect, the refrigerator controller cools the inside of the cool box to a target temperature when the temperature in the cool box is higher than the target temperature. Means for calculating the amount of electric power required to perform the operation, and based on the contents of comparison between the calculated amount of electric power and the amount of electric power supplied from the electric power supply unit, the presence or absence of increase in the amount of electric power supplied to the vehicle control unit is determined. And means for doing so.

According to the refrigeration apparatus for land transportation of the present invention, the refrigerator controller calculates the amount of electric power required to cool the inside of the cool box to the target temperature when the temperature inside the cool box is higher than the target temperature. And a means for determining whether or not the power supply amount is increased with respect to the vehicle control unit based on the content of comparison between the calculated power amount and the supplied power amount, so that the inside of the cool box reaches the target temperature. The required power supply amount can be easily obtained, and the cooling power can be appropriately executed by increasing the power supply amount based on the obtained power amount.

According to a fourth aspect of the present invention, a refrigerating machine controller is provided with a refrigerating apparatus for land transportation, in which the refrigerating machine cools a refrigerating box in a predetermined refrigerating cycle, and a power supply section for supplying electric power to the refrigerating machine. In a vehicle equipped with a refrigerating apparatus for land transportation, the temperature in the cold storage of the refrigerating apparatus for land transportation is higher than a target temperature, and the amount of power supplied from a power supply unit cools the cold storage to a target temperature. It is characterized by comprising a vehicle control unit that increases the amount of electric power supplied from the electric power supply unit until the required temperature is reached when the amount of electric power is less than that required for the vehicle.

According to the vehicle equipped with the refrigeration apparatus for land transportation according to the present invention, the temperature in the cold storage of the refrigeration apparatus for land transportation is higher than the target temperature, and the amount of power supplied from the power supply unit is
When the amount of electric power required to cool the inside of the cool box to a target temperature is smaller than that, the vehicle control unit performs control to increase the amount of power supplied from the power supply unit until the required temperature is reached. Can be cooled rapidly.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing a refrigerating apparatus for land transportation according to an embodiment of the present invention, FIG. 1 is a block diagram showing a relationship between a refrigerating apparatus for land transportation and a vehicle, and FIG. 2 is a land transportation. It is a flow chart which shows the contents of control of the refrigerator controller of the refrigeration system for cars. The refrigeration apparatus 1 for land transportation shown in FIG.
A drive controller 3, a refrigerator 4 including a fan motor, a compressor, and the like; and a freezer 5 mounted on a refrigerating car 6. The high-pressure refrigerant compressed by the compressor of the refrigerator 4 is heat-exchanged with the outside air. As a result, the refrigerant is condensed and liquefied, the liquid refrigerant is evaporated by the evaporator, and the latent heat is taken away, so that the cool box 5 is cooled in a predetermined refrigeration cycle. Such a refrigerating apparatus for land transportation (hereinafter referred to as “refrigerating apparatus”) 1 is operated by being supplied with electric power from the electric power supply unit 8 of the refrigerating vehicle 6. The power supply unit 8 is controlled by the vehicle control unit 9 together with the engine of the refrigeration vehicle 6 and the like.

As the power supply unit 8, in this example,
The present invention is applied to a hybrid vehicle having an engine or a vehicle traveling unit 7 in which an engine and a traveling motor are combined, and a generator or battery 8 for driving the traveling motor.
a and a generator 8b directly connected to the engine, and in any case, electric power is supplied to the refrigeration system 1 under the control of the vehicle controller 9. Vehicle control unit 9
Controls the vehicle traveling unit 7 and the power supply unit 8.

In the refrigeration system 1 of this embodiment,
When the electric power supplied from the electric power supply unit 8 becomes smaller than the electric power amount required to cool the inside of the cool box 5, the refrigerator controller 2 outputs a message to that effect to the vehicle control unit 9,
The vehicle control unit 9 increases the amount of electric power output from the electric power supply unit 8.

Therefore, the refrigerator controller 2 is shown in FIG.
As shown in FIG. 3, the electric power sensor 10 for detecting the amount of electric power supplied from the electric power supply unit 8 is provided, and when the amount of electric power supplied from the electric power supply unit 8 is reduced, the request signal 12 is output to the vehicle control unit 9. The amount of power supplied from the power supply unit 8 is increased by the control of the vehicle traveling unit 7 and the power supply unit 8 by the control unit 9. Power sensor 10
Is configured to detect both the voltage and the current of the power supplied from the power supply unit 8, but either one may be detected. In FIG. 1, reference numeral 1
Reference numeral 1 is a temperature sensor installed in the freezer 5.

Next, a specific control operation of the refrigerator controller 2 will be described below with reference to FIG. First, as shown in FIG. 2, the target temperature or the like of the cool box 5 is set (S21), and the electric power is supplied from the power supply unit 8 to start the operation (S22). During this operation, when the detection signal (hereinafter, referred to as "detection temperature") T of the temperature sensor 11 installed in the cool box 5 is input to the refrigerator controller 2, the input detection temperature T and the cold insulation are obtained. The target temperature in the storage 5 is compared and determined (S23).

As a result of the determination, the refrigerator controller 2
When the target temperature and the detected temperature T are the same, the monitoring is continued as it is, but when the detected temperature T is higher than the target temperature, the amount of electric power required to cool the inside of the cool box 5 is calculated based on the value (S24). ), The determined required power amount and the power supply amount P supplied from the power supply unit 8 are compared and determined (S25).

As a result of the determination, the refrigerator controller 2
If the supplied power amount P is the same as the required power amount, S2
When the process from step 3 onward is repeatedly executed and the supplied power amount P is small, the request signal 12 is output as shown in FIG. 1 to increase the supplied power amount P to the vehicle control unit 9 (S2).
6).

At this time, in order to request electric power from the refrigerator controller 2 to the vehicle controller 9, although not shown, for example, a signal is output by a relay circuit or a contact circuit that connects the two and 9 together. Alternatively, it outputs a signal depending on the presence or absence of voltage. When outputting as a voltage, a voltage of 0 to 5 V, 0 to 10 V, or the like may be output as an analog signal, or may be output as a digital signal.

On the other hand, when the vehicle control unit 9 receives the request signal from the refrigerator controller 2, the vehicle control unit 9 commands the vehicle running unit 7 and the power supply unit 8 based on the request signal to output the requested amount of power from the power supply unit 8. Supply to the refrigeration system 1. In this case, the vehicle control unit 9 increases the power supply amount P from the power supply unit 8. Therefore, when the refrigeration vehicle 6 is supplying power from the generator or the battery 8a, the vehicle control unit 9 increases the supply amount to supply power. Increase the amount P. On the other hand, when the refrigerating vehicle 6 is supplied from the generator 8b directly connected to the vehicle traveling unit 7 including the engine, the engine is stopped in idling stop operation or the refrigerating vehicle 6 is stopped and the engine is running at low rotation speed. In the state, by starting the engine or increasing the engine speed to increase the output of the generator 8b,
Increase the power supply amount P. This increase in the supplied power amount P is S
In 23, it is executed until the inside of the cool box reaches the target temperature, and when it reaches the target temperature, it is released.

As described above, the refrigerating apparatus 1 of this embodiment compares the amount of electric power required to cool the inside of the cool box 5 with
When the electric power supplied from the electric power supply unit 8 is small, the refrigerator controller 2 requests the vehicle control unit 9 to increase the amount of electric power supplied from the electric power supply unit 8, so that the inside of the cool box 5 is cooled. It is possible to prevent the ability from decreasing.
Therefore, even if the amount of electric power supplied to the refrigerating apparatus 1 decreases depending on the state of the vehicle 6, the supplied electric power amount P can be made to respond to the request from the refrigerating apparatus 1 side, so that good refrigerating performance can be obtained.

Further, the refrigerator controller 2 is provided in the cool box 5
The detected temperature T therein is higher than the target temperature, and the power supply unit 8
When the power supply amount P from P is less than the power amount necessary to cool to the target temperature, the demand signal 12 is output to the vehicle control unit 9 to reliably increase the power supply amount P. Since it is possible to perform favorable cooling without lowering the cooling capacity, the reliability of the refrigeration system 1 can be improved.

Further, the refrigerator controller 2 is provided in the cool box 5
When the internal temperature is higher than the target temperature, the vehicle control is performed based on the means for calculating the amount of electric power required to cool the inside of the cool box 5 to the target temperature, and the content of the comparison between the calculated amount of electric power and the supplied amount of electric power. Since the unit 9 has means for determining whether or not the supply power amount P has been increased, the supply power amount P required until the inside of the cool box 5 reaches the target temperature can be easily obtained, and the obtained amount is also obtained. By increasing the supplied power amount P based on the power amount, the cooling control can be appropriately executed.

When the vehicle controller 9 receives the request signal 12 from the refrigerator controller 2, the refrigerating vehicle 6 equipped with the refrigerating apparatus 1 increases the power supply to the power supply 8 until the temperature reaches the required temperature. As described above, the inside of the cool box 5 can be rapidly cooled, and the reliability of the electric power supplied to the refrigeration system 1 can be improved.

In the illustrated embodiment, the refrigerator controller 2 requests the vehicle controller 9 for the necessary amount of electric power, so that it is output by a relay circuit, a contact circuit, or a voltage such as 0-5V or a digital signal. I showed an example of doing so,
The point is that the signal may be any signal that increases the amount of power supplied, and it is desirable that the signal be output in a magnitude according to the required amount of power. Further, in the illustrated embodiment, an example in which the refrigeration vehicle 6 is applied to a hybrid vehicle is shown, but it is needless to say that the same operational effect can be obtained even when applied to an internal combustion engine vehicle equipped with only an engine.

[0029]

As described above, according to the invention of claim 1, when the electric power supplied from the electric power supply unit of the vehicle is small, the amount of electric power supplied from the electric power supply unit increases, Since it is configured to prevent the cooling capacity of the refrigerating device from decreasing, it is possible to cool the inside of the cool storage satisfactorily, improve the cooling performance, and stabilize the cooling. Is obtained.

According to the second aspect of the present invention, when the detected temperature in the cool box is higher than the target temperature and the amount of power supplied from the power supply unit is smaller than the amount of power required to cool to the target temperature. Since the refrigerator controller outputs a signal to increase the amount of electric power, it is possible to reliably increase the amount of electric power supplied, so that it is possible to perform good cooling without lowering the cooling capacity, and to refrigerate for land transportation. The effect that the reliability as a device can be improved is obtained.

According to the third aspect of the present invention, the refrigerator controller calculates the amount of electric power required to cool the inside of the cool box to the target temperature, and a comparison of the calculated amount of electric power and the amount of supplied electric power. Since the vehicle control unit has means for determining whether or not the amount of supplied electric power is increased based on the content, the effect of appropriately executing cooling control can be obtained.

According to the fourth aspect of the present invention, when the amount of electric power supplied to the refrigerating apparatus for land transportation is smaller than the amount of electric power required to cool the inside of the cool box to the target temperature, the vehicle control section determines that Since the control to increase the amount of power supplied from the power supply unit is performed until the temperature reaches, it is possible to rapidly cool the inside of the cool box and to improve the reliability of the power supplied to the refrigeration equipment for land transportation. To be

[Brief description of drawings]

FIG. 1 is a block diagram showing the relationship between a land transport refrigeration system and a vehicle according to an embodiment of the present invention.

FIG. 2 is a flowchart showing control contents of a refrigerator controller of a refrigeration apparatus for land transportation.

[Explanation of symbols]

1 Refrigeration equipment for land transportation (refrigeration equipment) 2 refrigerator controller 4 refrigerator 5 cold storage 6 Refrigeration vehicles (vehicles equipped with refrigeration equipment for land transportation) 8 power supply 9 Vehicle control unit 10 Power sensor P power supply

Claims (4)

[Claims] 1. A land transportation system comprising: a cool box mounted on a vehicle; and a refrigerator that cools the cool box in a predetermined refrigeration cycle by power supply from a power supply section controlled by a vehicle control section of the vehicle. In the refrigerating apparatus for electric power, when the amount of power supplied from the power supply unit is smaller than the amount of power necessary to cool the cool box, the amount of power supplied from the power supply unit is increased until the required amount of power is reached. A refrigeration apparatus for land transportation, comprising a refrigerator controller. 2. The refrigeration apparatus for land transportation according to claim 1, wherein the refrigerator controller has a temperature inside the cool box higher than a target temperature, and an amount of power supplied from the power supply unit is the cool box. When the amount of electric power required to cool the inside to a target temperature is smaller than that required, the vehicle controller is provided with means for requesting an increase in the amount of electric power of the electric power supply unit until the required amount of electric power is reached. Refrigeration equipment for land transportation. 3. The refrigeration apparatus for land transportation according to claim 2, wherein the refrigerator controller supplies electric power required to cool the inside of the cool box to the target temperature when the temperature inside the cool box is higher than the target temperature. A means for calculating the amount, and means for judging whether or not the amount of power supply to the vehicle control unit is increased based on the contents of comparison between the calculated amount of power and the amount of power supply from the power supply unit. Refrigeration equipment for land transportation characterized by. 4. A refrigeration unit for land transportation, which is equipped with a refrigeration unit for land transportation, in which the refrigeration unit cools a cool box in a predetermined refrigeration cycle by a refrigeration unit controller, and which has a power supply unit for supplying electric power to the refrigeration unit. In a device-equipped vehicle, the temperature in the cool box of the refrigeration apparatus for land transportation is high to the target temperature, and the amount of power supplied from the power supply unit is the amount of power required to cool the cool box to the target temperature. A vehicle equipped with a refrigeration apparatus for land transportation, comprising a vehicle control unit that increases the amount of electric power supplied from an electric power supply unit until the required temperature is reached when the temperature is smaller.