JPH01285778A - Freezing apparatus for on-vehicle container - Google Patents

Abstract

PURPOSE:To maintain the freezing capacity of a freezing container even when the vehicle is shut down by securing the freezing capacity of the freezing container with a refrigerant delivered from a compressor having a built-in motor that can be operated either by means of the output of the generator run by the vehicle engine or by means of the external power source. CONSTITUTION:While the vehicle is being driven, the generator 10 is run by the engine 1 to supply an output of about AC 200V via a switch 15 to a compressor 11 having a built-in motor. The refrigerant delivered from the compressor 11 is circulated between the compressor 11 and the evaporator-condenser unit 8, and, by the operation of said refrigerating cycle, cold air is supplied to the freezing container 9. At the time of the loading and unloading of cargo at a freezing factory, etc., the commercial power source 13 can be connected to the compressor motor via a connector 14. As a result, the freezing condition in the freezing container can be maintained even when the engine is shut down.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a refrigeration system for a vehicle-mounted container, and more particularly to a refrigeration system for a vehicle-mounted container whose refrigeration compressor can be driven by an external power source when the vehicle is stopped.

[Conventional technology]

FIG. 3 is a block diagram of a conventional refrigeration system for on-vehicle containers, and FIG. 4 is an external view of a refrigerated truck on which the refrigeration system for on-vehicle containers shown in FIG. 3 is mounted. In FIG. 3, 1 is a vehicle engine, and a generator 2 is directly connected to this vehicle engine 17. After the output of the generator is rectified by a rectifier 3, it is charged into a battery 4 and supplied to the vehicle electrical components. . Further, 5 is a clutch directly connected to the other end shaft of the engine 1, and a compressor 6 installed in the engine compartment of the vehicle is directly connected to this clutch 5. Reference numeral 7 denotes a pipe that circulates the refrigerant between the compressor 6 and the evaporator/condenser unit 8 disposed at the top of the vehicle. 9 indicates a refrigerated container. Next, the operation of the conventional in-vehicle cositena refrigeration system will be explained based on the above configuration. The engine 1 of the vehicle includes the drive system that makes the vehicle run.
The starting Ts*2 and the clutch 5 are directly connected. Since the output of the generator 2 driven by the engine 1 is an AC output, it is converted to DC by the rectifier 3 and once the battery 4
After being charged, it is supplied to vehicle electrical components such as the star and lights. Next, when freezing the inside of the refrigerated container, the engine 1 and the compressor 6 are directly connected by the clutch 5, and the compressor 6 is driven by the engine power. By driving this compressor 6, the refrigerant discharged from the compressor 6 is circulated between the compressor 6 and the evaporator/condenser unit 8 through the pipe 7. When the refrigerant is circulated in this manner, cold air is sent into the freezing container 9 by the action of the refrigeration cycle, thereby freezing the inside of the container. This allows perishable foods to be transported by truck to remote locations. In addition, if refrigeration is not required, clutch 5
By turning off the engine 1, the connection between the engine 1 and the compressor/sodium 6 is released, and the compressor 6 is not operated unnecessarily.

[Problem M that the invention attempts to solve]

Since the conventional on-vehicle container refrigeration system is configured as described above, in order to maintain the refrigeration capacity, it is necessary to rotate the engine to drive the compressor even when the vehicle is stopped. At refrigeration factories where large numbers of these workers gather, vehicle engine noise and exhaust gases generate pollution, which could become a major social problem. Also, since the engine of the refrigerated truck cannot be started while on board the car ferry, etc., the refrigerated truck has a built-in compressor driven by the engine. =T
There were issues such as the inability of refrigerated trucks equipped with FL equipment to use the car ferry. This invention was made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a refrigeration system for an on-vehicle container that can maintain the refrigerating capacity of a refrigerated container by driving a compressor using an external commercial power source even when the vehicle is stopped. With the goal.

[Means to solve the problem]

The refrigeration system for on-vehicle containers according to the present invention includes a refrigeration compressor with a built-in Ti motor for driving the compressor;
a generator that is driven by engine power of a vehicle and supplies a generated output to the electric motor; a power input section that connects an external F4 source to the electric motor; and a switch that switches the power supply of the electric motor to the external power source when the engine is stopped. It is equipped with the following.

[For production]

According to this invention, while a vehicle carrying a refrigerated container is running, the compressor with a built-in electric motor is driven by the output of a generator driven by the power of the vehicle engine to send cold air into the refrigerated container, and when the vehicle engine is stopped, the refrigerated container is To maintain the frozen state, supply an external cut-off power to the above electric machine and drive the refrigeration compressor.
When the vehicle is stopped, the refrigeration compressor can be driven without relying on engine power.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram of the on-vehicle container refrigeration system according to the present embodiment, and FIG. 2 is an external view of a refrigerated truck equipped with the on-vehicle container refrigeration system according to the present embodiment. In each figure, the same reference numerals as in FIGS. 3 and 4 indicate the same or corresponding parts, and detailed explanation thereof will be omitted. In FIG. 1, 10 is a generator for driving the compressor that is directly connected to the engine 1, and 11 is an I/O generator that is driven by the output of the generator 10.
@ A compressor with a built-in motor to be driven; 12 is a refrigeration unit containing an evaporator/condenser unit 8 and a compressor 11; 13 is an external commercial power source; 14
15 is a connector that connects the commercial power source 13 and the vehicle side, and 15 is a switch that cuts off the generator output when the external power source 13 is connected. Next, the operation of this embodiment having the above configuration will be explained. The generator 2 is driven by the engine 1 of the vehicle as in the conventional device, and the generated output is converted into DC by the rectifier 3, and then -
Once the battery 4 is charged, it becomes a power source for the vehicle's electrical components. Also, while the vehicle is running, the other generator 10 is also powered by the engine 1.
The generator 10 normally outputs an output of about 200 VAC. This alternating current voltage of 200 VAC is supplied to the compressor 11 with a built-in motor via the switch 15 which is in an on state. A motor (not shown) operates the compressor 11 and circulates the refrigerant discharged from the compressor between the compressor 11 and the evaporator/condenser unit (8). When the refrigerant is circulated in this manner, cold air is sent into the freezing container 9 by the action of the refrigeration cycle. Next, when loading and unloading cargo at a refrigeration factory, etc., the refrigerated truck needs to maintain the frozen state in the refrigerated container 9 even after the engine 1 is stopped. Operate the drive motor. To do this, first turn off the switch 15 that sends the output of the generator 10 to the compressor 11, and then
Commercial power source 13 is applied to the compressor drive motor via connector 14 . As a result, the compressor 11 exhibits the same refrigerating ability as when the vehicle is running, and maintains the frozen state in the refrigerated container even when the engine is stopped.

[Effect of investigation]

As described above, according to the present invention, the refrigerant capacity of the refrigerated container is obtained by the output of the generator driven by the engine power of the vehicle, or by the refrigerant input from outside the vehicle or discharged from an external power source. Because of this configuration, when the engine stops due to the vehicle stopping, does it need to be external? [Engine noise because the compressor can be driven by the engine and therefore there is no need to keep the engine running all the time to obtain refrigeration capacity. This has the effect of eliminating pollution problems such as exhaust gas.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an on-vehicle container refrigeration system according to an embodiment of the present invention, Fig. 2 is an external view of a vehicle similarly incorporating the refrigeration system, and Fig. 3 is a block diagram showing a conventional on-vehicle container refrigeration system. The block diagram shown in FIG. 4 is an external view of a vehicle incorporating the refrigeration system. 1 Engine, 10-fire? 4ali, 11 compressor, 12・refrigeration unit, 13・commercial power supply, 14・
・Connector, 15 Switch ◇ Note that the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (1)

[Claims] A refrigeration compressor with a built-in electric motor for driving the compressor, a generator driven by the engine power of the vehicle and supplying the generated output to the electric motor, a power input section for connecting an external power source to the electric motor, and when the engine is stopped, A refrigeration system for an on-vehicle container, comprising: a switch that uses the external power supply as the power supply of the electric motor.