JP2003341414A - Refrigerating device for land transportation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out a good cooling operation even if supply power of a generator is dropped. <P>SOLUTION: This refrigerating device is so structured that a refrigerator controller restrains a battery from being charged by the generator when the supply power P from the generator is dropped lower than required operation power C of a compressor. Thereby, the refrigerator controller is provided with a power sensor for detecting the supply power P of the generator, and is so structured that a charge amount for charging the battery from the generator is restricted when the supply power P from the generator is dropped lower than the required operation power C of the compressor. <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 refrigerating apparatus for land transportation mounted on a vehicle such as a truck, and more particularly to a refrigerating apparatus for land transportation operated by a combination of a vehicle generator and a dedicated battery. Regarding

[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.

Such a refrigerating apparatus for land transportation is of a generator driving system in which a generator driven by a running engine of a refrigerating vehicle carries out a cooling operation. When the generator is stopped, a cooling operation is carried out by a dedicated battery. Has become. The dedicated battery is always charged when the generator is driven. Further, when the refrigeration system for land transportation is cooling-operated by the generator, if the running engine of the refrigeration vehicle continues in a low rotation state such as an idling state, the power generation amount of the generator decreases, and accordingly. Insufficient power will not be available for cooling operation, and the battery will not be charged enough.
For example, the number of revolutions of the compressor, the operating current, the operating time, etc. have been controlled.

[0004]

However, in the conventional refrigeration apparatus for land transportation, when the power generation amount of the generator is reduced, the refrigerating capacity is remarkably lowered if the driving power of the compressor is saved, and the battery is charged. There is a problem that the cooling operation is greatly affected by the power supply state of the generator, that is, the power generation state.

The present invention has been made in consideration of such circumstances, and an object thereof is to effectively utilize the amount of power generated by a generator and to be concerned with a decrease in power supplied to the generator regardless of the decrease in power supplied to the generator. It is to provide a refrigeration apparatus for land transportation that can perform a favorable cooling operation.

[0006]

In order to achieve the above object, the present invention proposes the following means. The invention according to claim 1 comprises a freezer mounted on a vehicle, a dedicated battery charged by a generator provided in the vehicle, and a compressor for compressing a refrigerant supplied to the refrigerator, In the refrigeration apparatus for land transportation, which cools the inside of the cool box in a predetermined refrigeration cycle by the power supplied from the machine and charges the battery while cooling the battery by the battery when the generator is stopped, Is provided with a refrigerating machine controller that limits the amount of charge from the generator to the battery when the supplied electric power falls below the required operating electric power of the compressor.

According to the refrigeration apparatus for land transportation according to the present invention, when the electric power supplied to the generator falls below the required operating electric power of the compressor, the amount of charge from the generator to the battery is controlled. The amount of power supplied from the generator can be increased by that amount, so that the amount of power generation can be effectively used regardless of the decrease in the amount of power supplied to the generator, and good cooling operation can be realized.

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 outputs the electric power from the generator when the electric power supplied to the electric generator falls below the required operating electric power of the compressor. Means for stopping charging the battery is provided.

According to the refrigeration apparatus for land transportation according to the present invention, when charging of the battery from the generator is stopped when the power supplied to the generator is reduced, the power supplied to the generator is reduced by that amount. It is possible to improve the cooling operation, and it is possible to prevent the cooling operation from remarkably decreasing and to perform the cooling operation satisfactorily.

According to a third aspect of the present invention, in the refrigeration apparatus for land transportation according to the first aspect, the refrigerating machine controller performs a necessary operation when the electric power supplied to the generator is lower than a necessary operating electric power of the compressor. It is characterized by comprising means for changing the amount of charge from the generator to the battery according to the magnitude of electric power.

According to the refrigeration apparatus for land transportation according to the present invention, when the electric power supplied to the generator is reduced, the charge amount from the generator is changed according to the required operating electric power of the compressor. It is possible to prevent the cooling operation from significantly lowering, and it is possible to perform a good cooling operation.

According to a fourth aspect of the present invention, in the refrigeration apparatus for land transportation according to the second or third aspect, the refrigerating machine controller, when the electric power supplied by the generator exceeds the necessary operating electric power of the compressor, It is characterized by comprising means for charging the battery from a generator.

According to the refrigeration apparatus for land transportation of the present invention, when the power supplied from the generator exceeds the required operating power of the compressor, if the generator charges the battery, the battery is charged in consideration of the operating power of the compressor. Therefore, the battery can be reliably charged, and the compressor can be operated favorably.

[0014]

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 compressor 3, a refrigerator 4 including various components such as a fan motor, and a dedicated battery 5, and the high-pressure refrigerant compressed by the compressor 3 is condensed and liquefied by heat exchange with the outside air. Then, the liquefied refrigerant evaporates to take latent heat, so that a cool box (not shown) mounted on the vehicle can be cooled, and cooling operation is performed under the control of the refrigerator controller 2.

Further, a refrigerating apparatus 1 for land transportation (hereinafter referred to as "refrigerating apparatus") 1 is a generator 7 driven by a traveling engine 6 of a vehicle and is in a cooling operation as indicated by a thick line in FIG. By the generator 7, the refrigerator controller 2
While the battery 5 is charged via the power generator 7, when the generator 7 is stopped, the battery 5 performs a cooling operation. Therefore, the generator 7 and the battery 5 are used together.

The refrigerating apparatus 1 of this embodiment limits charging of the refrigerator controller 2 from the generator 7 to the battery 5 when the electric power supplied from the generator 7 decreases. .

Therefore, the refrigerator controller 2 is shown in FIG.
As shown in, when the electric power sensor 10 for detecting the electric power supplied to the generator 7 is provided and the amount of electric power generated from the generator 7 decreases,
That is, when the electric power supplied from the generator 7 is reduced, the amount of charge from the generator 7 to the battery 5 is limited. In this case, the decrease in the power supplied to the generator 7 is a case where the power has dropped below a necessary operating power described later that is necessary for operating the compressor 3, and is selected in advance. The power sensor 10 is installed on the output side of the generator 7,
Both the voltage and the current of the electric power supplied from the generator 7 are detected, but either one may be detected.

In FIG. 1, reference numeral 8 is a refrigerating apparatus 1.
Reference numeral 11 denotes an inverter that converts to a corresponding voltage, and reference numeral 11 denotes a power sensor that detects the power output from the inverter 8 and functions similarly to the power sensor 10. Further, the battery 5 constitutes a drive system for operating the refrigerator 4 including the compressor 3 via the inverter 8 when the generator 7 is stopped, as shown by a broken line, but otherwise, The external power source 9 also operates by configuring the drive system shown by the dotted line. Reference numeral 12 is
It is a temperature sensor that detects the temperature in the freezer.

Next, a specific control operation of the refrigerator controller 2 will be described below with reference to FIGS. 1 and 2. Now, by setting a target temperature and the like in a cool box (not shown) to be cooled by the refrigerator 4, the operation is started with the power supplied from the generator 7 as shown in FIG. During this operation, the refrigerator controller 2, as shown in FIG.
The target temperature is compared with the temperature inside the cool box detected by the temperature sensor 12 inside the cool box (S21), and based on the comparison result, the required operating power of the compressor 3 (rotation speed, operating current, operating time, etc.). ) C is required (S2
2).

At that time, when the power sensor 10 detects the power P supplied from the generator 7 and outputs the detected power to the refrigerator controller 2 (S23), the refrigerator controller 2 causes the compressor 3 to operate as required. The electric power C and the electric power P supplied from the generator 7 are compared and determined (S24). As a result of the determination, compared with the required operating power C of the compressor 3,
When it is determined that the power supply P from the generator 7 is sufficiently large (C <P), the battery 5 is charged from the generator 7 (S25), and the processes after S21 are repeatedly executed.

The required operating electric power C of the compressor 3 is determined based on the drive frequency of the compressor 3 from the difference between the temperature inside the freezer and the target temperature, or is determined based on the drive frequency, or the operation of the refrigerator unit. Based on the state, it is determined by reading the value from the separately set required power amount map, or the operating power amount of the compressor when the supply power P is exceeded in the process of operating the compressor to achieve the target temperature. Has been decided by.

On the other hand, as a result of the determination in S24, if the power supply P from the generator 7 decreases and the supply power P becomes insufficient, the refrigerator controller 2 stops charging the battery 5 from the generator 7 ( S26). After that, the operation power of the compressor 3 is increased by the amount of the electric power charged in the battery 5 to perform the cooling operation (S27), and S21 and subsequent steps are repeated. When the charging of the battery 5 is stopped, the amount of power generated by the generator 7 increases, and the required operating power C of the compressor is increased.
It is canceled when the supply power P becomes more sufficient.

In the refrigerating apparatus 1 of this embodiment, as described above, when the electric power P supplied from the generator 7 is less than the required operating electric power C of the compressor 3, the electric power is supplied from the generator 7 to the battery 5.
To the compressor 3 by stopping the charge to the
Since the operating power of the generator 7 is increased, even the generator 7 having the reduced supply power P can be effectively used for the cooling operation within the range of the generated power amount, and the cooling capacity is not deteriorated. Cooling operation can be performed.

Moreover, since the electric power P supplied from the generator 7 is constantly detected by the electric power sensor 10, the charging of the battery 5 can be stopped immediately when the electric power P decreases, and the electric power P can be reduced. You can react quickly to changes.

In this embodiment, the generator 7
An example in which the amount of charge is limited by stopping the charging of the battery 5 when the power P supplied from the power supply P is insufficient compared to the required operating power C of the compressor has been shown. However, the present invention is not limited to this. You can also

That is, when the power P supplied to the generator 7 is lower than the required operating power C of the compressor 3, the amount of charge from the generator 7 to the battery 5 is changed according to the magnitude of the required operating power C. That is, if the required operating power amount is large, the charging amount of the generator 7 with respect to the battery 5 is reduced, and if the required operating power amount is small, the battery 5 is reduced.
The charging amount of the generator 7 with respect to C may be set larger than that, and therefore, the required operating power C of the compressor 3
It is also possible to change the amount of charge to the battery 5 when the battery voltage drops further.

As described above, when the power supply P of the generator is reduced, if the charge amount of the generator is changed according to the required operating power C of the compressor 3, the cooling operation is prevented from being significantly reduced. Therefore, a good cooling operation can be performed.

[0028]

As described above, according to the first aspect of the present invention, when the power supplied to the generator is lower than the required operating power of the compressor, the battery is limited from being charged by the generator. Since it is configured, the power supplied from the generator can be increased by the controlled amount, and as a result, the generated power can be used effectively regardless of the decrease in the power supplied to the generator, and good cooling operation can be realized. The effect that can be obtained is obtained.

According to the second aspect of the present invention, when the power supply of the generator is reduced, charging of the battery from the generator is stopped, so that the cooling operation is prevented from being significantly reduced, and the cooling operation is preferably performed. The effect that can be obtained is obtained.

According to the invention of claim 3, when the electric power supplied to the generator is reduced, the charge amount of the generator is changed according to the required operating electric power of the compressor, so that the cooling operation can be remarkably performed. It is possible to obtain the effect that it is possible to prevent the deterioration and to perform a good cooling operation.

According to the fourth aspect of the invention, when the power supplied from the generator exceeds the required operating power of the compressor, if the battery is charged from the generator, the battery is charged in balance with the operating power of the compressor. Can be done
The battery can be reliably charged, and the compressor can be operated satisfactorily.

[Brief description of drawings]

FIG. 1 is a diagram showing a refrigerating apparatus for land transportation according to an embodiment of the present invention, and is a block diagram showing a relationship between a refrigerating apparatus for land transportation and a vehicle.

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 3 compressor 4 refrigerator 5 battery 7 generator 10, 11 Power sensor

Claims (4)

[Claims] 1. A refrigerating machine mounted on a vehicle, a dedicated battery charged by a generator provided in the vehicle, and a compressor for compressing a refrigerant supplied to the refrigerating machine. In the refrigerating apparatus for land transportation, which cools the inside of the refrigerator in a predetermined refrigerating cycle and charges the battery while the generator is stopped, the refrigerating apparatus for land transportation is cooled by the battery. Is provided with a refrigerating machine controller that limits the amount of charge from the generator to the battery when the electric power is lower than the required operating power of the compressor. 2. The refrigeration apparatus for land transportation according to claim 1, wherein the refrigerator controller charges the battery from the generator when the electric power supplied to the electric generator is lower than the required operating electric power of the compressor. A refrigeration apparatus for land transportation, which is provided with means for stopping the operation. 3. The refrigeration apparatus for land transportation according to claim 1, wherein the refrigerating machine controller responds to the magnitude of the required operating electric power when the electric power supplied to the generator is lower than the required operating electric power of the compressor. A refrigeration apparatus for land transportation, comprising means for changing a charge amount of a generator for the battery. 4. The refrigeration apparatus for land transportation according to claim 2, wherein the refrigerating machine controller transfers the electric power from the generator to the battery when the electric power supplied from the electric generator exceeds the required operating electric power of the compressor. A refrigeration apparatus for land transportation, comprising means for charging.