JPH05262125A - Power source device for vehicle-mounted cooling device - Google Patents

Abstract

PURPOSE:To provide a power source device whose operability is improved when a vehicle-mounted cooling device is driven by using the output of a generating device to be driven by an engine of a vehicle. CONSTITUTION:A booster 13 to boost the output voltage of a generating device to be driven by an engine of a vehicle 4 is provided in the vehicle 4. A rectifying device to rectify the output of the booster 13 and an inverter to form the power source to drive an electrically driven compressor by the output of the rectifying device are provided to a cooling device (R).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for an on-vehicle cooling device for cooling the inside of a cold storage of a vehicle.

[0002]

2. Description of the Related Art Conventionally, in this type of vehicle-mounted cooling device,
In the case of a large vehicle of 5 tons or more, a generator with a motor was mounted on the vehicle together with a cooling storage to supply power. This generator with a motor is expensive and heavy,
It is difficult to use in a ton class vehicle, and therefore, in such a vehicle, the voltage generated by the generator driven by the engine of the vehicle, that is, the alternator (alternating current generator) or the dynamo (direct current generator) is used as the cooling device. Must be used as a power source.

By the way, the voltage generated by a vehicle generator is normally once stored in a battery. Also, the output voltage of this battery is usually DC 12V or 24
It is V. On the other hand, a voltage such as 200 V AC is required to drive the electric compressor of the cooling device.

[0004]

Therefore, when a booster for boosting the direct current of 12 V or 24 V to an alternating current of 200 V is provided on the cooling device side to supply the electric compressor to the above-mentioned voltage, the battery is supplied to the cooling device. The current flowing through the power supply path is 100 in the case of the electric compressor equivalent to 2 horsepower.
The current is as large as A. Therefore, large-capacity wires must be used. In particular, if an attempt is made to construct the power supply path with an outlet formed in a cooling storage and an electric wire having a plug that extends from the vehicle and is detachably connected to the outlet, heat generation due to the contact resistance of both connection portions is large. Therefore, there is a problem that such a simple connection is virtually impossible.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and shows the usability when an on-vehicle cooling device is driven by using the output of a power generator driven by an engine of a vehicle. It is an object to provide an improved power supply device.

[0006]

That is, a power supply device 1 for a vehicle-mounted cooling device according to the invention of claim 1 is mounted in a cooling storage (freezing container) 3 provided in a vehicle 4, and this cooling storage (freezing container) is installed. ) 3 is a power supply device for a vehicle-mounted cooling device R that cools the inside of the vehicle 3, and a vehicle-mounted booster device 13 that boosts the output voltage of a power generator 12 that is driven by an engine 8 of the vehicle 4; A rectifying device 19 provided in the cooling device R for rectifying the output of the booster device 13, and a power generation device (inverter) for generating a power source for driving the electric compressor 22 of the vehicle-mounted cooling device R from the output of the rectifying device 19. And 21.

Further, the power supply device 1 of the on-vehicle cooling device according to the invention of claim 2 is provided in the cooling storage (freezing container) 3 mounted on the vehicle 4, and cools the inside of the cooling storage (freezing container) 3. A power supply device for the vehicle-mounted cooling device R, which is provided in the vehicle 4 and is provided in the vehicle-mounted cooling device R and a booster device 13 that boosts an output voltage of a power generation device 12 driven by an engine 8 of the vehicle 4. , Booster 13
A rectifier device 19 for rectifying the output of the rectifier, a power generator (inverter) 21 for generating a power source for driving the electric compressor 22 of the vehicle-mounted cooling device R from the output of the rectifier device 19, and a cooling storage (freezing container) 3 Is provided in the booster 13
And a connecting device 26 for electrically and detachably connecting the rectifying device 19.

[0008]

A power supply unit 1 for a vehicle-mounted cooling device according to the first aspect of the invention.
According to this, since the output voltage of the power generation device 12 of the vehicle 4 is boosted by the booster device 13 provided in the vehicle 4, the booster device 13 of the vehicle-mounted cooling device R is supplied.
Therefore, the value of the current flowing through the rectifier 19 decreases. Also,
Since the rectification is performed on the side of the vehicle-mounted cooling device R, the waveform of the output voltage of the booster device 13 may be unstable.

Particularly, the vehicle-mounted cooling device R according to the second aspect of the invention.
In addition to the above, according to the power supply device 1, the current value flowing through the connection device 26 provided in the cooling storage (freezing container) 3 is reduced, and thus heat generation due to the contact resistance of the connection portion is reduced. Further, since the connection device 26 is provided, commercial power can be supplied to the rectification device 19 from the connection device 26.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a side view of a vehicle 4 to which the invention is applied, and FIG. 2 is a power supply device 1 of a cooling device R as a vehicle-mounted cooling device of the invention.
The electric circuit diagram of is shown. The vehicle 4 is, for example, a truck having a loading weight of 2 tons, and a freezing container 3 as a cold storage is loaded on the loading platform 2 of the truck. The cooling device R
Is attached to the upper part of the refrigerating container 3. The cooling device R includes a condensing unit 6 and a cooling unit 7. The cooling unit 7 cools the refrigerant condensed by a condenser (not shown) included in the condensing unit 6.
It is vaporized by a cooler (not shown) included in the refrigeration container 3, and the inside of the refrigerating container 3 is cooled by the endothermic action generated at this time.

The basic structure of the vehicle 4 is a general truck, which is used as a refrigerating vehicle by loading a refrigerating container 3 on its carrier 2. Therefore,
It is possible to remove the freezing container 3 from the vehicle 4,
Normally, the freezing container 3 is used by being stationary, and it is also possible to load and carry the frozen storage container 3 on the vehicle 4 only when carrying the frozen storage article.

Next, in FIG. 2, C1 indicates an electric circuit on the vehicle 4 side, and C2 indicates an electric circuit on the cooling device R side. The vehicle 4 has an engine 8 for traveling, an alternator 9 as a power generator, and a battery 11. In the embodiment, the alternator 9 and the battery 11 constitute a power generator 12. The alternator 9 is driven by the engine 8 to generate electricity, and its output is stored in the battery 11. The output voltage of the battery 11 is DC 24V and is used for supplying power to other electric components used for running the vehicle 4, and the output voltage of the battery 11 is input to the booster 13.

The power generator 12 may be composed of only the alternator 9, and the booster 13 may be directly supplied with the output generated by the alternator 9. However, by supplying the output of the battery 11 as in the embodiment, it is possible to reduce the influence of the load variation on the engine 8. The step-up device 13 is provided in the vehicle 4, forms a square wave from the direct current 24V output from the battery 11, and transforms the square wave voltage by a transformer.
For example, it outputs a voltage of three-phase AC 200V of 50 HZ or 60 HZ. An electric wire 16 having a plug 14 is connected to the output side of the booster 13.

On the other hand, the cooling device R has a DC 24V power supply 17
A cooling fan 18 which is included in the cooling unit 7 and circulates the cold air cooled by the cooler in the freezing container 3, a rectifying device 19 including a diode three-phase bridge, and a power generating device. The inverter 21 and the electric compressor 22 included in the condensing unit 6
And a controller 23 for controlling them. In addition, a socket 24 is provided on the upper front surface of the freezing container 3.
The socket 24 is provided with the DC 24V power source 1
7 and the rectifying device 19 are connected. The plug 14 of the electric wire 16 extending from the booster 13 of the vehicle 4 is detachably connected to the socket 24.
A connecting device 26 is constituted by the reference numerals 4 and 24.

The electric compressor 22 constitutes the condensing unit 6 together with the condenser and the condensing fan which are not shown, and also constitutes a known refrigeration cycle together with the cooler.
It is a 200V AC specification and the output is equivalent to 2 horsepower.
The DC 24V power supply 17 generates a stable DC 24V voltage from the voltage supplied to the socket 24, and its output voltage is supplied to the cooling fan 18 (including other control devices) and the controller 23. The rectifier 19 rectifies the voltage supplied to the socket 24 and supplies it to the inverter 21. The inverter 21 generates a three-phase AC 200V voltage from the output voltage of the rectifier 19 to generate the electric compressor 2.
2 is supplied (actually, the condensing fan is also supplied with power).

The operation will be described with the above configuration. When the freezing container 3 is loaded on the loading platform 2 of the vehicle 4 and the engine 8 is started, the alternator 9 is driven to generate a voltage of about 28 V AC, which is rectified inside and stored in the battery 11. DC 24 which is the output voltage of the battery 11
V is input to the step-up device 13 and once converted into a square wave, the voltage is stepped up by the transformer, and the three-phase AC 200 V (50 HZ
/ 60HZ) voltage is generated. The waveform of the output voltage of the booster 13 may be unstable as will be described later. The output of the power generation device 12, which has been boosted by the pressure boosting device 13 in this manner, is supplied from the electric wire 16 to the DC 24V power supply 17 and the rectifying device 19 of the cooling device R via the plug 14 and the socket 24.

The DC 24V power supply 17 rectifies the supplied three-phase AC 200V voltage and steps it down to generate a DC 24V voltage, drives the cooling fan 18, and controls the controller 2
Power 3 The controller 23 controls the operation of the cooling fan 18 based on the temperature inside the freezing container 3 and the like.

The rectifying device 19 rectifies the supplied three-phase AC 200V voltage to generate DC 280V and supplies it to the inverter 21. The inverter 21 is the controller 23
Generates a stable three-phase AC 200V voltage having a predetermined frequency from the DC 280V voltage. The electric compressor 22 is driven by the three-phase AC 200V, and the controller 23 controls the firing angle of the inverter 21 based on the temperature in the refrigerating container 3 or the like to adjust the frequency of the output voltage and drive the electric motor. The operation of the compressor 22 is controlled. Therefore, the magnet switch required when the commercial AC voltage is directly supplied to the electric compressor 22 becomes unnecessary. Further, the controller 23 reduces the starting current of the electric compressor 22 by controlling the frequency of the output voltage of the inverter 21 so that the electric compressor 22 starts slowly when starting.

A current flows through the electric wire 14 to drive the electric compressor 22, but the voltage appearing at the output of the booster 13 is raised to 200 V of three-phase AC, so that electric power equivalent to 2 horsepower is obtained. The current value of the power consumption of the compressor 22 is 10 A or less. Therefore, the electric wire 14 need only be thin and have a small current capacity, and the decrease in the current value flowing through the plug 14 and the socket 24 also reduces the heat generation due to the contact resistance of the connecting portions thereof, thus
Even if the connecting device 26 is configured with a simple structure, there is no risk of accidents such as burnout, so that the refrigerating container 3
It will be easy to load and unload itself. In particular, when the refrigerating container 3 is unloaded from the vehicle 4 by providing the socket 24, the commercial three-phase AC 200V is used.
The power supply (50HZ / 60HZ) AC is connected to the socket 24, and the cooling device R can be operated.

The three-phase alternating current 2 output from the booster 13
Since the 00V voltage is once rectified by the rectifying device 19 on the cooling device R side, the output waveform of the booster device 13 may be unstable, so that an inexpensive device can be used as the booster device 13. Become. Further, since the controller 23 on the cooling device R side suppresses the starting current to a low level by the inverter 21, it is not necessary to control the operation of the engine 8 on the vehicle 4 side due to the large current flowing at the time of starting as in the conventional case, and therefore the refrigerating container Since the control line between the vehicle 3 and the vehicle 4 is unnecessary, this also enables the freezing container 3
Makes it easy to load and unload.

[0021]

As described in detail above, according to the invention of claim 1, after the output voltage of the power generator of the vehicle is boosted by the booster provided in the vehicle, it is supplied to the rectifier of the vehicle-mounted cooling device. Therefore, the value of the current flowing from the booster to the rectifier is small. Therefore, it becomes possible to use a thin power supply line with a small current capacity,
Improves safety and usability. In addition, since the boosted voltage is rectified by the rectifier of the vehicle-mounted cooling device and then supplied to the power generator to be used for power generation of the electric compressor, even if the waveform of the output voltage of the booster is unstable. Therefore, a simple and inexpensive device can be used as the booster device.

In particular, according to the invention of claim 2, in addition to the above, the value of the current flowing through the connection device provided in the cooling storage is reduced, so that the heat generation due to the contact resistance of the connection portion is reduced, and therefore the safety is improved. Is improved, and a connection device having a simple structure can be used. As a result, loading and unloading of the cold storage loaded on the vehicle becomes easy, and it becomes possible to supply commercial power to the rectifying device using this connection device, and when using the cold storage loaded on the vehicle. Then, it becomes easy to switch between the case of stationary use and the case of using.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle to which the present invention has been applied.

FIG. 2 is an electric circuit diagram of a power supply device for a vehicle-mounted cooling device of the present invention.

[Explanation of symbols]

 1 Power Supply Device 3 Refrigeration Container 4 Vehicle 8 Engine 12 Power Generation Device 13 Booster Device 14 Electric Wire 19 Rectifier Device 21 Inverter 22 Electric Compressor 26 Connection Device R Cooling Device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ken Aoki 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A vehicle-mounted cooling device mounted in a cooling storage provided in a vehicle for cooling the inside of the cooling storage, wherein an output voltage of a power generation device provided in the vehicle and driven by an engine of the vehicle is boosted. And a rectifying device that is provided in the vehicle-mounted cooling device and rectifies the output of the booster device, and a power supply that generates a power supply for driving the electric compressor of the vehicle-mounted cooling device from the output of the rectifying device. A power supply unit for a vehicle-mounted cooling device including a device. 2. An in-vehicle cooling device provided in a cooling storage mounted on a vehicle for cooling the inside of the cooling storage, wherein an output voltage of a power generation device provided in the vehicle and driven by an engine of the vehicle is boosted. And a rectifying device that is provided in the vehicle-mounted cooling device and rectifies the output of the booster device, and a power supply that generates a power supply for driving the electric compressor of the vehicle-mounted cooling device from the output of the rectifying device. A power supply device for a vehicle-mounted cooling device, comprising: a device; and a connection device that is provided in the cooling storage and electrically and detachably connects the booster device and the rectifier device.