JPH04111299U - Drive unit for vehicle refrigeration equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a drive device for a vehicular refrigeration system that can switch the power supply without using an expensive electromagnetic switch. [Structure] First and second rectifiers 11 and 12 are connected to an alternator 2 driven by a vehicle engine 1 and a connection end connected to a commercial power source 3, respectively. Furthermore, the output ends of each of the first and second rectifiers are connected to the motor control device 7. The motor control device controls the operation of the electric compressor 4 included in the vehicular refrigeration system.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a drive device for a vehicular refrigeration system, and particularly to a drive device for a vehicular refrigeration system. The AC generator, which is driven by related to motion equipment.

0002

[Conventional technology]

Conventionally, as shown in FIG. 2, an alternator 2 is driven by an engine 1 of a vehicle. Alternatively, the electric compressor 4 is operated by receiving power from the commercial power source 3 to cool the inside of the container. A refrigeration device for a vehicle that freezes the liquid is known. In this type of refrigeration equipment, An electromagnetic switch 5 is used to switch between the electric machine 2 and the commercial power source 3. Electromagnetic opening When the switch 5 is connected to the commercial power source 3, it connects the built-in movable contact to the commercial power source 3 side. It is something that The output of the electromagnetic switch 5 is rectified by a rectifier 6 and sent to the motor control device 7. Supplied. In the motor control device 7, internal control is performed by the signal from the motor control circuit 13. By sequentially turning on and off the six transistors 14 stored in the The source is a stator coil 16 of a DC brushless motor 15 built into the electric compressor 4. As a result, the rotation of the DC brushless motor 15 is controlled, and the The operation of the electric compressor 4 is controlled. Note that 8 is a smoothing capacitor.

0003

[Problem that the idea aims to solve]

However, with electromagnetic switches, the electric compressor is connected from an alternator or commercial power source. Because it is necessary to switch the flowing current, the electromagnetic switch contacts have a fairly large capacity. is required, is quite large and expensive, and has moving parts called contacts. However, there is a problem of poor reliability. Therefore, the problem of this invention is to switch the power supply without using an expensive electromagnetic switch. An object of the present invention is to provide a drive device for a vehicular refrigeration system that can perform the following operations.

0004

[Means to solve the problem] According to the present invention, an alternator driven by a vehicle engine and a commercial power supply A commercial power connection end for connecting to the AC power supply, an electric compressor for compressing the refrigerant, and Based on the power source obtained from either the generator or the above commercial power connection terminal. and a control device for controlling the operation of the electric compressor. The drive device is connected to the alternator and adjusts the alternating current voltage from the alternator. a first rectifier connected to the commercial power supply connection end and connected to the commercial power supply connection end; a second rectifier that rectifies the alternating current voltage, each of the first and second rectifiers A drive for a vehicular refrigeration system, characterized in that an output end is connected to the above control device. A device is obtained. Here, it is preferable that the first rectifier is built into the alternator.

[0005]

【Example】

FIG. 1 shows a drive device for a vehicular refrigeration system according to an embodiment of the present invention. In addition Components similar to those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. Referring to FIG. 1, a first rectifier 1 that rectifies an alternating voltage at the output end of an alternator 2 Connect 1. On the other hand, the output end of the commercial power supply 3, specifically, the commercial power connection end is A second rectifier 12 is connected to rectify the current voltage. Furthermore, the first and second rectifiers 1 1 and 12 are connected to the motor control device 7 in parallel with each other. When the engine 1 of the vehicle is driving the alternator 2, the alternator 2 AC power is supplied to the first rectifier 11, where it is rectified and then connected to the motor control system. 7. Therefore, the motor control device 7 is based on the electric power from the alternator 2. Then, the drive of the electric compressor 4 is controlled. When the engine 1 is stopped, the commercial power supply 3 is connected to the commercial power supply connection end. As a result , commercial AC power is supplied to the second rectifier 12, where it is rectified and then connected to the motor. It is supplied to the control device 7. Therefore, the motor control device 7 is powered by the commercial power source 3. The drive of the electric compressor 4 is controlled based on the following. Furthermore, FIG. 3 shows a cross-sectional view of an alternator that incorporates the first rectifier described above. Six diodes 21 are installed inside.

[0006]

[Effect of the idea]

As explained above, according to the present invention, electricity can be generated without using an expensive electromagnetic switch. It is possible to provide a drive device for a vehicular refrigeration system that can switch sources. Also Another advantage is that it is highly reliable because there are no moving parts called contacts.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a drive device for a vehicular refrigeration system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a drive device for a conventional vehicular refrigeration system.

FIG. 3 is a cross-sectional view of an alternator with a built-in first rectifier.

[Explanation of symbols]

1 engine 2 AC generator 3 Commercial power supply 4 Electric compressor 5 Electromagnetic switch 6 Rectifier 7 Motor control device 8 Capacitor 11 First rectifier 12 Second rectifier

Claims (2)

[Scope of utility model registration request] Claim 1: An alternator driven by a vehicle engine, a commercial power connection end for connection to a commercial power supply, an electric compressor for compressing refrigerant, the alternator and the commercial power connection end. and a control device for controlling the operation of the electric compressor based on a power source obtained from either one of the AC generator and the AC generator. a first rectifier that rectifies the AC voltage from the machine; and a second rectifier that is connected to the commercial power supply connection terminal and rectifies the AC voltage from the commercial power supply connection terminal, the first and second rectifiers A drive device for a vehicular refrigeration system, characterized in that each output end of the above is connected to the control device. 2. The drive device for a vehicular refrigeration system according to claim 1, wherein the first rectifier is built into the alternator.