Air conditioner

A technology of air-conditioning device and driving device, applied in the direction of output power conversion device, transportation and packaging, air treatment equipment, etc.

Inactive Publication Date: 2004-03-24
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] In addition, since the current shown in Fig. 21(b) contains high-frequency componen

Method used

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Examples

Experimental program
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Effect test

Embodiment approach 1

[0065] FIG. 1 shows a circuit diagram of an electric compressor drive unit. The difference from FIG. 17 which is a conventional example is that the power lead wire is changed to one shielded wire 29, and the electrolytic capacitor 41 is eliminated, but the electrolytic capacitor 3 is provided on the battery 1 side.

[0066] This electrolytic capacitor 3 is unnecessary if the source impedance of the battery 1 is very low. In addition, in the shielded wire 29, the core wire 30 is set to the positive side, and the outer peripheral wire 31 is set to the negative side.

[0067] FIG. 2( a ) is a structural view of the shielded wire 29 , and the outer peripheral wire 31 wraps around the core wire 30 . FIG. 2( b ) is a magnetic field direction diagram of the shielded wire 29 . Because the current of the core wire 30 flows in the opposite direction to the current of the outer peripheral wire 31, the magnetic field 32 generated by the current of the core wire 30 and the magnetic field...

Embodiment approach 2

[0079] FIG. 6 shows a circuit diagram of an electric compressor drive unit. From the electric compressor driving device shown in FIG. 1, the current sensor 15, the voltage detection unit 16, and the current detection unit 17 are removed, and a current detection resistor 42, an integration resistor 43, an integration capacitor 44, and a sub relay are added. 48. The film capacitor 28, and the 12V power supply 22 is not connected.

[0080] The inverter control microcomputer 19 and the like using the 12V power supply 22 are powered by the switching power supply 12 . Also, the ground is set to be the same as that of the battery 1 . The communication circuit 20 and the air-conditioning control unit 21 communicate using a photocoupler while being electrically insulated. The divided voltages of the upper side voltage dividing resistor 13 and the lower side voltage dividing resistor 14 can be directly input to the microcomputer 19 for inverter control.

[0081] In addition, the curr...

Embodiment approach 3

[0093] FIG. 9 shows a circuit diagram of an electric compressor driving device. Different from the circuit diagram of the electric compressor driving device shown in FIG. 1 , the power lead line is made into one parallel line 34 .

[0094] FIG. 10 shows the configuration of parallel lines 34 in FIG. 9 .

[0095] The parallel wires 34 pass through a bendable electrically insulating resin 35 to keep the two conducting wires 36 parallel. It is not limited to this form, and it can also be realized by wrapping it with a tape, or passing two lead wires through a vinyl tube.

[0096]In the case of parallel wires as shown in FIG. 3, though not shielded wires, the inductance value is small. In addition, in the case of parallel wires, since the distance between the two conducting wires 36 is constant, the inductance value is constant, enabling a reliable design with a specific inductance value.

[0097] Since there is one parallel wire, it is easier to handle than two lead wires. In...

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Abstract

An air conditioner includes a direct-current (DC) power supply, a compressor, and a compressor driving device that converts a current supplied from the DC power supply into an alternate-current (AC) for driving the compressor. The DC power supply energizes the driving device through a center conductor and an outer conductor of a shield cable. This structure allows the driving device not to include a capacitor for smoothing a power current, and to suppress surge voltages and electromagnetic-wave radiation, thus providing an air-conditioner including a compact size and light-weighted compressor driving device.

Description

technical field [0001] The present invention relates to an air conditioner including an electric compressor and an electric compressor driving device. Background technique [0002] A conventional electric compressor drive unit for automobiles will be described with reference to the drawings. [0003] Fig. 15(a) is a perspective view showing the appearance of the electric compressor driving device for automobiles. In the figure, the case 24 is a metal frame of a waterproof structure, and devices are provided therein. The connection wire 55 is drawn out from the connection wire lead-out part 47 of the waterproof structure provided on the casing 24 . The connection wire 55 consists of two wires connected to a battery of about 300V as a DC power supply, three wires connected to an electric compressor, two wires connected to a 12V power supply, and an air conditioner control unit. The control signal is composed of 3 wires. [0004] Inside the casing 24, an inverter circuit th...

Claims

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Application Information

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IPC IPC(8): B60H1/00B60H1/32F04C23/00H02M7/00H02M7/06
CPCH02M7/003B60H1/00428F04C23/008H02M1/44B60H1/3223H02M7/06Y02T10/88B60H1/00385B60H2001/3292
Inventor 后藤尚美西井伸之
Owner PANASONIC CORP
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