JP3324051B2 - Power supply for refrigerated vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply mechanism for a refrigerator car.

[0002]

BACKGROUND OF THE INVENTION Recently, trucks have become commonplace for low-temperature transport of frozen and fresh foods. In order to increase the efficiency of these transportations, trucks have been gradually increased in size, and large refrigerators equipped with refrigeration equipment have also been used. This type of truck is provided with a refrigerator and an internal combustion engine for driving the refrigerator in addition to the drive source of the vehicle, and the refrigerator performs a freezing operation even when the refrigerator is alone. It is configured to be.

FIG. 2 is a side view schematically showing a refrigerating trailer vehicle connected to a tractor among the refrigerating and refrigerating vehicles. In FIG. 2, reference numeral 100 denotes a tractor that pulls a trailer 101. The tractor 100 has an engine 102 of about several hundred horsepower, which is a main driving source. Tractor 10
0 is provided with a battery 103 and a generator attached to the engine 102 as various power sources such as for engine control and a power source for a headlight. When the engine 102 is operating, the battery 103 is charged from the generator. are doing. On the other hand, a refrigerator 104 is mounted on the trailer 101. The refrigerator 104 includes a refrigerator engine 105 and is driven by the refrigerator engine 105. The engine 105 is provided with an AC generator 106, which is driven by the engine 105 to generate electric power. The generated electric power is converted into direct current by a rectifier (not shown) and stored in the battery 107. A blower 108 for circulating cool air generated from the refrigerator 104 in the container 101 is provided inside the container 101, and the blower 108 rotates by receiving power from a battery 107.

In order to operate the stopped refrigerator 104, power is first supplied from the battery 107 to the starting motor 109, and the engine 104 is started by the driving force of the starting motor 109.

[0005]

The tractor 100 is similar to a truck equipped with a diesel engine.
The power supply voltage is a 24 volt system. Also, the trailer 101
The power supply voltage around the refrigerator installed in the Refrigerator is still 12 volt because of the historical fact that the previously imported refrigerator was 12 volt. Therefore, the trailer 101 is isolated from the tractor 100 in terms of power supply, and has a unique 12-volt battery 107 mounted thereon.

Accordingly, the present invention provides a vehicle driving unit without using the above-described conventional complicated electric power system,
An object of the present invention is to make a power supply system of a portion equipped with a refrigerator-freezer compatible, and to omit a battery mounted in the refrigerator-freezer.

[0007]

In order to achieve the above-mentioned object of the present invention, the present invention provides a refrigeration system provided in a traveling vehicle and provided with a refrigeration system operated at a power supply voltage lower than the power supply voltage of the traveling vehicle. In a power supply mechanism of a refrigerator vehicle, a conversion means for pulsating a power supply voltage on a traveling vehicle side by a chopping operation and converting the average voltage into a voltage of a refrigeration facility of a refrigerator and a refrigerator for the refrigerator by the power converted by the conversion means. A power supply mechanism for a refrigerating and refrigerated vehicle, comprising: a starting motor for starting an engine; and a charging unit that is driven by the refrigerating engine and charges power storage equipment on the refrigerating refrigerator side with generated power. provide.

In the above mechanism, the power supply voltage on the traveling vehicle side is DC 24 volts, and the power supply for refrigeration equipment on the refrigerator side is 12 volts. Further, the output of the AC generator driven by the refrigerator engine on the refrigerator-freezer side is stepped up in voltage by the step-up transformer and supplied to the power storage equipment on the traveling vehicle side. The traveling vehicle is a van type truck, and the traveling vehicle is a tractor of a trailer vehicle. The refrigerator is a refrigerator mounted on a carrier of a van type truck, and the refrigerator is a refrigerator provided on a trailer of a trailer car.

[0009]

A power supply voltage of 24 volts on the side of the traveling vehicle is pulsed by a chopping operation to convert the average voltage to 12 volts, which is the voltage of the refrigeration equipment of the refrigerator, and an engine for the refrigerator is used by the electric power converted by the conversion means. To start. Further, the power storage equipment on the traveling vehicle side is charged with the electric power generated by the AC generator driven by the started refrigerator engine.

[0010]

Next, an embodiment in which the present invention is applied to a trailer vehicle will be described in detail with reference to the drawings. FIG. 1 is a circuit block diagram showing one embodiment of the present invention. The circuit block diagram is separated into a tractor side and a trailer side by a two-dot chain line. On the tractor side, 1 is a main engine for driving the tractor and the trailer. The main engine 1 is equipped with an AC generator 2, and the generated power is supplied to a rectifier 3.
After that, the voltage is adjusted by the regulator 4 and stored in the 24-volt power storage equipment 5 in which two 12-volt batteries are connected in series.

On the trailer side provided with the refrigerator, a compressor 10 for the refrigerator is provided. The compressor 10 has a refrigerator engine 1 for driving the compressor 10.
1 are connected. The engine 11 for the refrigerator is provided with a starting motor 12 and an AC generator 13. 14
Is a rack for adjusting the output of the refrigerator engine 11. The heat exchanger 15 connected to the compressor 10 includes:
A blower 16 for circulating cool air inside the container refrigerator is connected. This blower 16 is driven by a DC motor 17.

A voltage regulator 18 is provided at an output end of the AC generator 13 driven by the refrigerator engine 11, and outputs a voltage from the rectifier 19 by adjusting a field current of the AC generator 13. Adjust the voltage so that the DC voltage is 12 volts. 20 is a step-up transformer and 21 is a rectifier. 22 is a chopper,
The DC voltage of 24 volts supplied from the power storage equipment 5 on the tractor side is converted into a pulse wave of 50% duty. The electric power pulsed by the chopper 22 is applied to the starting motor 12 of the refrigerator engine 11. By interposing such a chopper between the 24 volt power storage equipment and the starting motor, the average voltage applied to the starting motor is 12 volts, so that it does not operate with an overvoltage. 23 is an electronic control unit.

Next, the operation of the present invention will be described. When the start button S connected to the electronic control device 23 is pressed while the trailer-side refrigeration equipment is at rest, a signal is sent from the electronic control device 23 to the start switch ST, which is turned on for only a few seconds. . For this reason, electric power is supplied from the power storage equipment 5 on the trailer side to the chopper 22 for only a few seconds, and the generated pulse is applied to the starting motor 12 to rotate and start the refrigerator engine 11. The engine 11 drives the compressor 10. When the refrigerator engine 11 starts, the AC generator 13 starts to generate power, and the generated power is supplied to the DC motor 1 that drives the blower 16 via the voltage regulator 18, the rectifier 19, and the switch SW1.
7 and is rotated to blow cool air into the trailer.

The electronic control unit 23 monitors the temperature signal THS in the trailer, and adjusts the rack 14 when the internal temperature becomes higher than a predetermined temperature to increase the output of the refrigerator engine 11 to control the compressor 10. It is operated strongly, and cooler cold air is sent from the blower 16 into the refrigerator. The output voltage of the power storage equipment 5 on the tractor side is monitored by the electronic control unit 23 by the voltmeter 24. Then, when this voltage decreases, the switch SW2 is turned on, the generated power of the AC generator 13 is stepped up by the step-up transformer 20, converted into DC by the rectifier 21, and then stored in the power storage equipment 5. To charge it.

When the tractor pulling the refrigeration trailer stops at a parking lot such as a resting place and the driver takes a nap, the accessory circuit is normally turned on while the engine of the tractor is stopped. Often. At this time, power is supplied from the power storage equipment 5 on the tractor side to the accessory circuit, and thus the power storage equipment 5 is severely consumed. In such a case, in the present invention, the main engine 1 of the tractor is used.
Is stopped and the trailer-side refrigeration engine 11 is operated, power is supplied from the trailer to the tractor-side accessory circuit. For this reason, the amount of power stored in the power storage equipment 5 is not consumed.

Although the present invention has been described with reference to the above-described embodiment, the present invention can be applied to a van-type vehicle in which a packing box mounted on a vehicle carrier is a refrigerator-freezer, and is within the scope of the present invention. Various modifications and applications are possible, and these modifications and applications are not excluded from the scope of the present invention.

[0017]

As described above in detail, according to the present invention, the power supply of the traveling vehicle is stepped down to the voltage of the refrigeration equipment of the refrigerator by the chopper, and the engine of the refrigeration equipment is started at this voltage. Therefore, unlike the related art, no starting battery is required on the refrigerator-freezer side. In addition, surplus electric power generated from the refrigerating equipment on the refrigerator-freezer side is supplied to the power storage equipment on the tractor side, and can also be supplied to an accessory circuit of the traveling vehicle. For this reason, although it is a simple mechanism, it is possible to obtain a function as if the power supply equipment having the same power supply voltage is provided between the traveling vehicle and the refrigerator-freezer having different power supply voltages.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing one embodiment of the present invention.

FIG. 2 is a side view schematically showing a refrigerating trailer vehicle connected to a tractor.

[Explanation of symbols]

 1 Main engine 2 Alternator 3 Rectifier 4 Regulator 5 Storage device 10 Compressor 11 ··· Refrigerator engine 12 ····· Start motor 13 ····· Alternator 14 ···· Rack 15 ··· Heat exchanger 16 ··· Blower 17 ··· DC motor 18 Voltage regulator 19 Rectifier 20 Step-up transformer 21 Rectifier 22 Chopper 23 Electronic control unit 24 voltmeter

Claims (7)

(57) [Claims] 1. A power supply mechanism for a refrigerating and refrigerating vehicle provided with a refrigerating and refrigerating facility provided on a traveling vehicle and operating at a power supply voltage lower than the power supply voltage of the traveling vehicle, wherein the power supply voltage on the traveling vehicle is pulsed by a chopping operation. Conversion means for converting the average voltage into the voltage of the refrigeration equipment of the refrigerator, a starting motor for starting the engine for the refrigerator by the electric power converted by the conversion means, and a motor for driving the refrigerator to generate electric power. And a charging means for charging power storage equipment on the refrigerator-freezer side with the generated electric power. 2. The refrigerating and refrigerating vehicle power supply equipment according to claim 1, wherein the power supply voltage on the traveling vehicle side is 24 VDC, and the power supply for the refrigerating equipment on the refrigerating refrigerator side is 12 volts. 3. An output of an AC generator driven by an engine for a refrigerator on a refrigerator side is stepped up in voltage by a step-up transformer and supplied to a power storage facility on a traveling vehicle side. Item 2. Power supply equipment for a refrigerator car according to item 1. 4. A power supply system for a refrigerator-freezer according to claim 1, wherein said traveling vehicle is a van type truck. 5. The power supply system for a refrigerator-freezer according to claim 1, wherein the traveling vehicle is a tractor of a trailer vehicle. 6. The refrigerator according to claim 1, wherein the refrigerator is mounted on a carrier of a van type truck.
Power supply equipment for a refrigerated vehicle described in the above. 7. The refrigerator according to claim 1, wherein the refrigerator is a refrigerator provided on a trailer of a trailer car.
Power supply equipment for a refrigerated vehicle described in the above.