JP3291740B2 - Leakage detection device of automotive air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for a vehicle air conditioner equipped with an electric compressor.

[0002]

2. Description of the Related Art In a conventional air conditioner of a belt drive type compressor directly connected to a combustion engine, a compressor is not driven by a motor unlike a home air conditioner. Although an air conditioner equipped with an electric compressor has come out, as described in JP-A-63-57316, an air conditioner is not provided.

[0003]

However, in general, in order to drive the electric compressor, it is necessary to use a power source, such as 10 V, which is higher than 12 V or 24 V, which is the power source of the conventional vehicle equipment.
A generator having a high voltage output of 0 V or 200 V is required. In this case, if the leakage is not detected, for example, when the occupant touches the high voltage line, the electric shock state continues or the leakage occurs through the device. If there was, there was a risk of fire.

[0004] The present invention solves the above-mentioned problems of the prior art, and has an object to prevent danger due to electric leakage.

[0005]

According to the present invention, a first coil and a second coil are inserted into the same slot of a stator core, and the coils are connected to each other by connecting the coils. Is a terminal for a first voltage, the other end of one of the coils is a terminal for a second voltage different from the first voltage, and a common magnetic field of a rotor is applied to each of the coils. A dual-output generator, an electric compressor having a built-in motor driven by an electric input, and a rectifier that converts an AC output from the second voltage terminal of the generator into a DC, and outputs the DC. When,
A DC output from the rectifier is used as at least a power supply for driving the electric compressor, and a driving device for driving the electric compressor. A switch for opening and closing, a current transformer for monitoring the current balance of a plurality of input lines or output lines connected to the rectifier, and when the current transformer detects a current imbalance, the switch is opened and closed. A switch control unit for opening the switch is provided.

Further, the vehicle has an abnormality display means for notifying an occupant of an abnormality.

[0007]

According to the present invention, by opening the circuit of the air conditioner at the time of occurrence of electric leakage or notifying the occupant that electric leakage has occurred, air conditioning can be performed safely without fear of electric shock or fire.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 is a block diagram showing one embodiment of the present invention. The AC output output from the second voltage terminal of the generator 3 passes through the switch 4 and is converted by the rectifier 2 into a DC output. The converted DC output is input to the driving device 8 as a power source for driving the electric compressor 9. In addition, the current transformer 5 monitors the balance of the current of the plurality of input lines or output lines connected to the rectifier 2, and when the current becomes unbalanced, the switch control unit 7 opens the switch 4, The abnormality display means 6 notifies the occupant of the abnormality.

FIG. 2 shows an example of a control flow in the electric leakage detection device. First, the current balance of a plurality of input lines or output lines connected to the rectifier is detected (step 101). When the current is not balanced, the switch is opened (step 102) and an abnormality is displayed (step 1).
03), to prevent danger due to electric leakage.

FIG. 3 shows an example of electric leakage.
The electric current leaked from the connected device enters the negative electrode of the battery 1 through the earth leakage path 10 such as a body, and flows to the generator 3.

[0012]

According to the present invention, as is apparent from the above description,
A first coil and a second coil are inserted into the same slot of the stator core, and the respective coils are connected to each other to serve as a first voltage terminal, and the other end of one coil is connected to the first coil. And a single-shaft, two-system output-type generator having a terminal for a second voltage different from the voltage of the first and second coils, and a common magnetic field of a rotor acting on each of the coils, and an electric compressor having a motor driven by an electric input. A rectifier that receives an AC output from the second voltage terminal of the generator as an input, converts the DC output to DC, and outputs the DC output.The DC output from the rectifier is used as at least a power supply for driving an electric compressor. A protection device for an air conditioner for a vehicle, comprising a driving device for driving an electric compressor, a switch for opening and closing an output side of a terminal for the second voltage, and a switch connected to the rectifier. A current transformer that monitors the current balance of a plurality of input lines or output lines that are present, a switch control unit that opens the switch when current imbalance is detected by the current transformer, and an occupant. By having the abnormality display means for notifying the abnormality, it is possible to prevent the danger due to the electric leakage.

[Brief description of the drawings]

FIG. 1 is a configuration diagram according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an example of a control flow of the electric leakage detection device.

FIG. 3 shows an example of a leakage path.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery 2 Rectifier 3 Generator 4 Switch 5 Current transformer 6 Abnormality display means 7 Switch controller 8 Drive unit 9 Electric compressor 10 Leakage path

Continuation of the front page (56) References JP-A-1-218917 (JP, A) JP-A-3-134449 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60H 1 / 32 F25B 49/02 570

Claims (2)

(57) [Claims] 1. A first coil and a second coil are inserted into the same slot of a stator core, and the respective coils are connected to each other to form a connection point as a first voltage terminal. A single-shaft, dual-system output-type generator whose ends serve as terminals for a second voltage different from the first voltage and apply a common magnetic field of a rotor to each of the coils, and a motor driven by an electric input An electric compressor with a built-in, and a rectifier that receives an AC output from the second voltage terminal of the generator as an input, converts the output into a DC, and outputs the DC.
A DC output from the rectifier is used as at least a power supply for driving the electric compressor, and a driving device for driving the electric compressor. A switch for opening and closing, a current transformer for monitoring the current balance of a plurality of input lines or output lines connected to the rectifier, and when the current transformer detects a current imbalance, the switch is opened and closed. A leakage detection device for an air conditioner for a vehicle having a switch control unit for opening a switch. 2. A leakage detection device for an air conditioner for a vehicle, comprising an abnormality display means for notifying an occupant of an abnormality when a current imbalance is detected by a current transformer.