JP3147388B2 - Automotive air purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle air purifier for controlling the operation of an air purifier main unit by a signal generator installed at a distance from the air purifier main unit.

[0002]

2. Description of the Related Art In recent years, in-vehicle air purifiers have become widespread in order to keep the air in the cabin of an automobile clean.

Conventionally, this type of vehicle air purifier is shown in FIG.
The configuration shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG.
It is connected to a battery 5 via a CC switch 2, a power switch 3, and a wiring 4 inside the vehicle. The ACC switch 2 is a power switch of the electrical component 6 operated by an engine key of the automobile.

With the above configuration, the air purifier body 1 is started and stopped by opening and closing the power switch 3 only when the engine key is inserted and the ACC switch 2 is ON.

[0006]

In such a conventional air purifier for a vehicle, in order to prevent the battery 5 from rising, the air purifier main body is operated only when the engine is running. When the air purifier 1 is installed at the rear of the cabin, the ACC switch 2 and the air purifier main body 1 are connected to each other.

The present invention has been made to solve the above problems, and an object of the present invention is to make it possible to perform power supply wiring without using dedicated wiring and to simplify installation work.

[0008]

In order to achieve the above object, the present invention comprises a signal generator connected to a power supply wiring of a motor vehicle and an air purifier main unit, wherein the signal generator transmits a plurality of signals. A signal generating circuit to be superimposed on the power supply wiring, a selection switch for selecting a plurality of signals generated by the signal generating circuit, and a filter, wherein the air purifier main unit includes a plurality of signals superimposed on the power supply wiring. And a plurality of switches for opening and closing the load according to the output of the signal detection circuit, and controlling the operation of the load by opening and closing the selection switch.

[0009]

According to the present invention, by closing the selection switch connected to the signal generating device,
A signal corresponding to the selection switch can be generated and superimposed on the power supply wiring. On the other hand, the signal is determined by a signal detection device provided in the air purifier main unit installed at the rear of the passenger compartment, and the signal is determined. A load can be opened and closed in response to the load, and the existing wiring for supplying electricity to the electrical components at the rear of the vehicle body is used, so that no new dedicated wiring is required.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.

As shown in the figure, the signal generator 7 and the air purifier main unit 8 are connected by a power supply wiring 9 in the vehicle cabin, and the signal generator 7 is connected to a battery 11 via an ACC switch 10. The filter 12 provided in the signal generator 7 continues in series with the power supply line 9 and is connected to the output of the signal generator 13 and the battery 11 from the connection point. The signal generation circuit 13 includes a plurality of selection switches 14,
15 are connected, and a plurality of signals are generated and superimposed on the power supply wiring 9. The air purifier main unit 8 includes the fan motor 1
6, a signal detection circuit 17, and switches 18 and 19 for opening and closing a plurality of loads. The switch 18 is connected to a fan motor 16, and the switch 19 is connected to an electric component 20 already installed at the rear of the vehicle body. . The signal detection circuit 17 determines a plurality of signals superimposed on the power supply wiring 9.

The operation of the above configuration will be described.
When the selection switches 14 and 15 are open while the ACC switch 10 is closed, no output signal is output from the signal generation circuit 13, so that the signal detection circuit 13 of the air purifier main unit 8 switches the switches 18 and 19. Hold open. When the selection switch 14 or 15 is closed, a corresponding signal is output to the output terminal of the signal generation circuit 13 and transmitted to the signal detection circuit 17 of the air purifier main unit 8 through the power supply line 9. The signal detection circuit 17 can close the switch 18 or 19 according to the transmitted signal.

Next, a specific embodiment of the signal generator 7 and the air purifier main unit 8 will be described with reference to FIG.

As shown in FIG. 1, a signal generator 7 connects a field effect transistor (hereinafter referred to as FET) 22 to an output of an astable multivibrator 21 and
Are connected to the power supply wiring 9 via a resistor 23, and an inductance 24 is connected between the connection point and the ACC switch 10. The capacitors 25 and 26 are capacitors for determining the oscillation frequency of the astable multivibrator 21, and one ends of the capacitors 25 and 26 are grounded by the selection switches 14 and 15, respectively. The air purifier main unit 8 includes a microcomputer 27, a constant voltage power supply 28 for applying a voltage to the microcomputer 27, FETs 29 and 30 driven by the microcomputer 27, and the fan motor 16. The resistors 31 and 32 are connected to the power supply wiring 9.
To the microcomputer 27, one end of which is connected to the power supply wiring 9. The electric component 20 is driven by the FET 29.

The operation of the above configuration will be described.
With the C switch 10 closed, select switch 1
When the terminals 4 and 15 are open, the astable multivibrator 21 stops transmitting because the capacitors 25 and 26 that determine the transmitting time constant are not connected. When the selection switch 14 or 15 is closed, the astable multivibrator 21
Starts oscillating at a frequency corresponding to the time constant. The FET 22 is repeatedly turned ON and OFF according to this frequency, and the power supply wiring 9 is grounded by the resistor 23. Inductance 2
4 is set to a sufficiently high impedance with respect to this frequency, a signal of this frequency is superimposed on the power supply wiring 9. This frequency can be changed by a combination of the selection switches 14 and 15, that is, a combination of the capacitors 25 and 26. Air purifier main unit 8
Then, this signal is determined by the microcomputer 27,
The load corresponding to the signal can be opened and closed by the FETs 29 and 30. In other words, if the signal generator 7 is installed near the driver and the air purifier main unit 8 is installed at the rear of the cabin, a plurality of loads can be opened and closed by one power supply wiring 9. This eliminates the need for special wiring when installing the device.

In this embodiment, the signal generation circuit 13
Uses an astable multivibrator 21 as
It is clear that similar results can be obtained with other pulse generating circuits.

[0017]

As is apparent from the above embodiment, according to the present invention, a signal generator connected to the power supply wiring of an automobile and an air purifier main unit are provided. A signal generation circuit to be superimposed on the power supply wiring, a selection switch for selecting a plurality of signals generated by the signal generation circuit, and a filter; A signal detection circuit for discriminating, and a plurality of switches for opening and closing the load according to the output of the signal detection circuit are provided, and the operation of the load is controlled by opening and closing the selection switch. When installing the air purifier main unit near the rear of the cabin, it is not necessary to install special wiring that connects the front and rear of the cabin, making installation work very easy. It can be carried out.

[Brief description of the drawings]

FIG. 1 is a block diagram of a vehicle air purifier according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a specific embodiment of the on-vehicle air purifier;

FIG. 3 is a block diagram of a conventional vehicle air purifier.

[Explanation of symbols]

 Reference Signs List 7 signal generator 8 air purifier main unit 9 power supply wiring 12 filter 13 signal generation circuit 14, 15 selection switch 16 fan motor (load) 17 signal detection circuit 18, 19 switch 20 electrical component (load)

Claims (1)

(57) [Claims] 1. A signal generator connected to a power supply wiring of an automobile and an air purifier main unit, wherein the signal generator generates a signal from a signal generation circuit for superimposing a plurality of signals on the power supply wiring. A selection switch for selecting a plurality of signals to be performed, and a filter, wherein the air purifier main unit determines a plurality of signals superimposed on the power supply wiring, and a load is provided by an output of the signal detection circuit. An on-vehicle air purifier, comprising: a plurality of switches for opening and closing, wherein the operation of the load is controlled by opening and closing the selection switch.