JP2003176968A - Auxiliary equipment for refrigerated vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a smooth operation of electric equipment by an AC power outside a vehicle by supplying a DC power to the electric equipment of a refrigerating system while reducing a space required for installation, a total vehicle weight, and a cost. <P>SOLUTION: As the auxiliary equipment for driving the refrigerating system of the refrigerated vehicle by means of the AC power outside the vehicle, a belt 33 is spread over a pulley 11b for compression, a pulley 31b for electric motor, and a pulley 32b for AC generator. A control means 40 is provided in which a part of the DC power generated, at driving of the electric motor 31 by the AC power, by a power transmitted via the belt and supplied by an IC regulator function from the AC generator 32 to a battery BATT, is supplied to an evaporator 41 and a capacitor 42 of the refrigerating system, thereby controlling actuation. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary device for a refrigerating vehicle in which a refrigerating device for cooling the inside of a cold storage mounted on a vehicle is driven by an AC power supply external to the vehicle. About. 2. Description of the Related Art Conventionally, a refrigerating vehicle has been equipped with a refrigerating device of a refrigerating system in which a compressor, a condenser, a decompression means and an evaporator are connected in order by a refrigerant pipe and mounted on a vehicle. It is known that the evaporator is made to face the cool box to cool the cool box. In the refrigerating apparatus, the refrigerant gas discharged from the compressor driven by the engine (not shown) is liquefied by the condenser and then sent from the pressure reducing means (expansion valve) to the evaporator. After being gasified by the evaporator, it is returned to the compressor. In this case, the power from the accessory pulley, which is rotationally connected to the shaft of the accessory driven by the engine of the vehicle, is applied to the compressor pulley that is rotationally connected to the shaft of the compressor via the belt. The compressor is operated (driven) by this. [0003] In recent years, there has been a demand for frozen cars to keep the inside of the cool box at an extremely low temperature (-150 ° C to -50 ° C) depending on the goods to be transported. By the way, in such a refrigerated vehicle, an external power supply (AC power supply of the marine vessel) is provided so that the inside of the cool box is kept in an optimally frozen state even during sea transportation by a marine vessel or the like in which the engine of the vehicle is stopped. The motor is driven, and a belt is stretched between the motor pulley and the compressor pulley, which is rotatably connected to the shaft of the motor, so that power can be transmitted, so that the compressor can operate even when the engine is stopped. ing. In this case, although it is necessary to supply power also to electric equipment (evaporator, condenser, etc.) of the refrigeration apparatus, since this electric equipment is driven by a vehicle power supply (DC power supply), an external power supply (AC200V The power supply is transformed by a transformer and then rectified by a rectifier into a DC power supply (DC 24 V power supply), thereby supplying DC power to electric equipment of the refrigeration apparatus. [0004] However, the transformer and the rectifier for transforming the above-mentioned external power supply (AC 200 V power supply) are very bulky, heavy, and costly. The installation of the rectifier requires a large installation space, increases the total weight of the vehicle, and is disadvantageous in terms of cost. [0005] From such a point, there is a demand to supply DC power to the electric equipment of the refrigerating apparatus when the electric motor is driven by an external power supply by using some alternative means without using a transformer and a rectifier. SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and has as its object to eliminate the transformer and the rectifier, to save the installation space, reduce the total weight of the vehicle, and reduce the cost. It is an object of the present invention to provide an auxiliary device for a refrigerating car that can supply a DC power to an electric device of a refrigerating device and enable smooth operation of the electric device by an AC power source outside the vehicle while reducing the cost. . Means for Solving the Problems In order to achieve the above-mentioned object, a solution taken by the present invention comprises a cool box mounted on a vehicle and a refrigerating device for cooling the cool box. In the refrigerating vehicle, an auxiliary device that drives the refrigerating device with an AC power supply external to the vehicle is assumed. A compressor pulley rotatably connected to a shaft of a compressor that compresses a refrigerant circulating in a refrigerant circuit of the refrigeration apparatus, and a rotary shaft integrally connected to a shaft of an electric motor driven by a power supply outside the vehicle. A pulley for an electric motor, a pulley for an alternator rotatably connected to a shaft of an alternator that supplies direct current power to a vehicle battery by an IC regulator function, a pulley for the compressor, a pulley for the electric motor, and an alternator A part of DC power generated from an AC generator that is generated by power transmitted through the belt when the motor is driven and a belt that is wrapped around the machine pulley so that power can be transmitted to the electric equipment of the refrigeration system And control means for controlling the operation of the electric device. According to this specific matter, when the electric motor is driven by an AC power supply (AC power supply) outside the vehicle, the compressor and the AC generator operate via the belt, and the AC generator (IC)
A DC power supply (DC power supply) from the regulator) is supplied to the battery of the vehicle. Then, a part of the DC power supplied from the AC generator is supplied to electric equipment (evaporator, condenser, etc.) of the refrigeration apparatus by the control means,
The operation of the electric device is controlled. Therefore, it is possible to supply a part of the DC power generated by operating the AC generator with the built-in IC regulator by the motor driven by the AC power to the electric equipment of the refrigeration apparatus, and to provide the AC power outside the vehicle. This makes it possible to perform a smooth operation of the electric device. Moreover, a transformer for transforming an external power supply and a rectifier are not required, so that the installation space can be saved, the total weight of the vehicle can be reduced, and the cost can be reduced. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a refrigerating vehicle provided with an auxiliary device according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a refrigerating car. The refrigerating car 1 includes a refrigerating device 18 and is configured to cool the inside of a refrigerator 4 mounted on the vehicle 3. The refrigerating device 18 includes a compressor 11 for compressing the refrigerant, a condenser 12 for condensing the refrigerant compressed by the compressor 11, and a decompression means 13 for decompressing the refrigerant condensed by the condenser 12. (E.g., a capillary tube) and an evaporator 14 for evaporating the refrigerant decompressed by the decompression means 13 are sequentially connected by refrigerant pipes 15..., And the evaporator 14 is placed in the cold storage 4 of the refrigerator car 1. The inside of the cool box 4 is cooled down. In the refrigerating device 18, the refrigerant gas discharged from the compressor 11 is liquefied by the condenser 12, sent to the evaporator 14 from the decompression means 13, gasified by the evaporator 14, and then compressed. The machine 11 is to be returned. In this case, the refrigerant cooled by the evaporator 14 is supplied to the decompression unit 1.
The pressure in the cool storage 4 is reduced to an extremely low temperature (for example, -60 ° C.) by being decompressed by the evaporator 3 and evaporated in the evaporator 14. In FIG. 1, 16 is a condenser fan, and 17 is an evaporator fan. Further, as shown in FIG.
8 has a hydraulic circuit 20. This hydraulic circuit 20
Is connected to an output shaft Ea of an engine E of the vehicle 3 and is driven by the engine E.
A first fixed displacement hydraulic motor 22 driven by the displacement of oil from the fixed displacement pump 21; and a first fixed displacement hydraulic motor 22 driven by the first fixed displacement hydraulic motor 22 so that the oil reaches a predetermined target value. A variable displacement pump 23 for controlling the displacement, a second fixed displacement hydraulic motor 24 driven by the displacement of oil having a predetermined target value discharged from the variable displacement pump 23 and driving the compressor 11; It has. The fixed displacement pump 21, the first fixed displacement hydraulic motor 22, the variable displacement pump 23 and the second fixed displacement hydraulic motor 24
Are connected so that oil can be circulated. Note that FIG.
Reference numeral 27 denotes an oil pan. The variable displacement pump 23 is of a swash plate type, and has a size capable of absorbing the maximum discharge capacity (maximum torque) of oil from the fixed displacement pump 21 driven when the engine is at maximum output. Is set. The variable displacement pump 23 includes a cylinder (not shown) as an element for controlling the pump displacement such that the discharge displacement (absorption torque) can be maintained at a substantially constant predetermined target value set in advance.
have. This cylinder can adjust the tilt angle of the swash plate that controls the capacity of the variable displacement pump 23 by hydraulic pressure. The cylinder reduces the capacity of the variable displacement pump 23 when the bottom pressure increases and expands, and increases the capacity of the variable displacement pump 23 when the bottom pressure decreases and contracts with the urging force of the urging spring. It is made to let. As described above, by increasing or decreasing the capacity of the variable displacement pump 23, the absorption torque of the variable displacement pump 23 is controlled so as to have a substantially constant predetermined value. Thereby, the first
When the displacement of the oil from the fixed displacement hydraulic motor 22 is small, the displacement of the variable displacement pump 23 increases, while when the displacement of the oil is large, the displacement of the variable displacement pump 2 increases.
3, the discharge capacity of the variable displacement pump 23 becomes constant regardless of the discharge capacity of the first fixed displacement hydraulic motor 22. Next, an auxiliary device of the refrigerator car 1 will be described with reference to FIG. As shown in FIG. 3, the auxiliary device 30 includes a compressor pulley 11b rotatably connected to a shaft 11a of the compressor 11, and an electric motor driven by an AC power supply (AC power supply) outside the vehicle. A motor pulley 31b rotatably connected to a shaft 31a of the motor 31 and an AC generator 32 for supplying a DC power supply (DC power supply) to the battery BATT of the vehicle by an IC regulator function. AC generator pulley 32b, belt 3 wrapped around the compressor pulley 11b, the electric motor pulley 31b, and the AC generator pulley 32b so as to transmit power.
3 and a part of a DC power supply (24 VDC) from an AC generator 32 generated by motive power transmitted through a belt 33 when the electric motor 31 is driven. ), And control means 40 for controlling the operation of the evaporator 41 and the condenser 42 and the like. The electric motor 31 is connected to an AC power source (AC
It operates by transmitting a signal from a control means 40 incorporating 200 V) to an electromagnetic switch (not shown). The AC generator 32 has a built-in voltage and current control circuit (IC regulator) therein, and has a function of supplying a required amount of voltage and current. Here, a procedure for operating the refrigeration system 18 with an AC power supply outside the vehicle will be described. in this case,
It is assumed that the engine E of the vehicle 3 is stopped. First, the control means 40 is provided with an AC
When a start switch (not shown) of the refrigeration apparatus 18 is turned on in a state where the power supply (200V AC) is taken in, that is, supplied, a DC power supply (24V DC) is supplied from the battery BATT of the vehicle to the control means 40, and the control is performed. A signal is transmitted from the device 40 to the electromagnetic switch, and the electric motor 31 rotates. At the same time, a power generation start signal is transmitted from the control means 40 to the AC generator 32. When the motor 31 is driven, its power is transmitted to the AC generator via the belt 33 to start power generation. Electricity (DC power) generated by this power generation is supplied to the battery BATT of the vehicle 3. On the other hand, a part thereof is sent to the control means 40 and supplied to the evaporator 41 and the condenser 42 of the refrigeration system 18 (electric equipment), and the operation of the evaporator 41 and the condenser 42 is controlled. As described above, the AC power source (AC2
A part of the DC power (DC 24 V) generated by operating the AC generator 32 via the belt 33 by the electric motor 31 driven by the control unit 40 is supplied from the control means 40 to the evaporator 41 and the condenser 42 of the refrigerator 18. As a result, the evaporator 41 and the condenser 42 can be smoothly operated by the AC power supply outside the vehicle. Further, a transformer for transforming an external power supply and a rectifier are not required, so that the installation space can be saved.
It is possible to reduce the total weight of the vehicle and reduce the cost, which is very advantageous in implementing. As described above, according to the refrigeration vehicle accessory device of the present invention, the power of the motor driven by the AC power supply outside the vehicle is transmitted to the compressor and the AC generator via the belt. By supplying a part of the DC power supplied from the AC generator to the electric equipment of the refrigeration apparatus, the electric equipment can be smoothly operated by the AC power supply outside the vehicle. In addition, a transformer and a rectifier are not required, so that the installation space can be saved, the total weight of the vehicle can be reduced, and the cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a schematic configuration of a refrigerating vehicle provided with an auxiliary device according to an embodiment of the present invention. FIG. 2 is a hydraulic circuit diagram showing a drive system of the refrigeration apparatus. FIG. 3 is an explanatory diagram illustrating a configuration of an auxiliary device. [Description of Signs] 1 Freezer car 3 Vehicle 4 Cooler 11 Compressor 11a Shaft 11b Compressor pulley 18 Refrigerator 30 Auxiliary equipment 31 Motor 31a Shaft 31b Motor pulley 32 AC generator 32a Shaft 32b AC generator pulley 33 Belt 40 Control means 41 Evaporator (electric equipment) 42 Capacitor (electric equipment) E Engine

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor ▲ Taka ▼ Hidetaka Yama             2 Sakaemachi, Sano-shi, Tochigi             Inside the specially equipped vehicle division of the company F term (reference) 3L045 AA01 AA02 AA06 AA07 BA02                       CA02 DA02 EA01 HA01 KA00                       LA01 LA04 NA00 PA02 PA04                       PA05

Claims (1)

Claims: 1. A refrigerating vehicle having a cool box mounted on a vehicle and a refrigerating device for cooling the inside of the cool box, wherein the refrigerating device is driven by an AC power supply external to the vehicle. A compressor pulley rotatably connected to a shaft of a compressor that compresses a refrigerant circulating in a refrigerant circuit of the refrigeration device, and a rotary shaft integrally connected to a shaft of an electric motor driven by a power supply external to the vehicle. A pulley for an AC motor, which is connected to a shaft of an AC generator that supplies DC power to a vehicle battery by an IC regulator function, and a pulley for an AC generator, which is integrally connected to a shaft of the AC generator; A belt wrapped around the pulley and the alternator pulley so as to transmit power, and a dc power source from the alternator generated by power transmitted through the belt when the electric motor is driven. And a control means for controlling the operation of the electric equipment by supplying a part of the electric equipment to the electric equipment of the refrigeration apparatus.