JP3358293B2 - 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 a vehicle air purifier installed on a rear tray of a car.

[0002]

2. Description of the Related Art In a conventional vehicle air purifier, the motor airflow during operation does not change irrespective of the presence or absence of a person in the rear seat of the car.

[0003]

However, in such a conventional on-vehicle air purifier, the sound of the operation of the air purifier in the driver's seat was not bothersome, but a person sitting in the rear seat had no air. There was a big problem that the operating noise of the purifier was noisy. The present invention has been made in view of the above problems, and has as its object to provide an air purifier that operates properly without being noisy even for a person sitting in a rear seat.

[0004]

In order to achieve the above object, the technical means described in claim 1 of the present invention compares the detection time of the gas sensor with the detection time of the dust sensor, and determines the time. When the difference is shorter than the predetermined time, the motor airflow is made smaller than usual.

In order to achieve the above object, a technical means according to a second aspect of the present invention is to provide a human body detection sensor for detecting far-infrared rays emitted from a human body, wherein a person is in a rear seat of the car. It arranged to detect only when, the motors <br/> over air flow is obtained so as to be smaller than usual.

In order to achieve the above object, the technical means described in claim 3 of the present invention is to reduce the motor airflow below normal when a human body detection sensor detects, but when the motor is rotating, Human body detection sensor
This is so that the output of is not taken in.

[0007] To achieve the above object, technical means described in claim 4 of the present invention, the back seat the output of the transmitter section
Receiving unit that receives the output from another person, and detects the output of this receiving unit.
Detecting means, and an output of the detecting means for reducing the motor air volume from a normal level.

[0008]

With the vehicle air purifier configured as described above, the smoking in the rear seat is determined, and the air purifier is operated.
Further, it is possible to drive the air purifier without discomfort by judging whether or not a person is in the rear seat, and to operate the air purifier by reliably judging that a person is in the rear seat.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the technical means described in claim 1 of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a dust sensor, 2 denotes a gas sensor, and respective outputs are input to the detecting means 3. The detecting means 3 detects which sensor has a shorter detection time, how much the time difference is present, and compares it with a predetermined time. Reference numeral 4 denotes control means for varying the rotation speed of the motor 5.

The operation of the air purifier configured as described above will be described below.

First, when smoking in the front seat of the car, the detection time of the gas sensor 2 is shorter than the detection time of the dust sensor 1 because the diffusion speed of the gas component of the cigarette is faster than the diffusion speed of the dust component. , There is a large difference in the detection time of the detection means 3. At this time, even if the motor 5 is rotated at full speed, the smoke of the air purifier does not matter because the smoker is in the front seat.

Next, when smoking in the rear seat of the car, the distance between the smoker and each sensor is short, so that the difference in the detection time of the detection means 3 becomes small. At this time, by lowering the rotation speed of the motor 5 by the control means 4, it is possible to operate the air purifier with a driving sound that does not matter to the person in the rear seat.

[0013] Further, since the purifying ability is lowered by lowering the rotation speed, the optimum air cleaning operation can be performed by extending the operation time.

As described above, according to this embodiment, the operation can always be performed with a quiet driving sound. One embodiment of the technical means described in claim 2 of the present invention will be described below with reference to FIG.
In FIG. 2, reference numeral 6 denotes a human body detection sensor that detects far-infrared rays emitted from a person, and is installed in a place where detection is performed only when a person gets on a rear seat of the car. 7 is a detecting means, 4 is a control means, and 5 is a motor.

The operation of the air cleaner configured as described above will be described below.

When a person is riding in the rear seat, the detection output is always output from the human body detection sensor 6 and is input to the detection means 7. In this case, the rotation speed of the motor 5 is controlled by the control means 4. If dropped, the operating noise of the air purifier can be reduced. However, when there is no person in the rear seat, no detection output is output from the human body detection sensor 6, so that even if the motor 5 is rotated at full speed, the driving sound does not matter.

As described above, according to the present embodiment, it is possible to reliably detect the entry of a person into the rear seat and operate the air purifier.

One embodiment of the technical means described in claim 3 of the present invention will be described below with reference to FIG. In FIG. 3, reference numeral 6 denotes a human body detection sensor that detects far-infrared rays emitted from a person, and is installed in a place where detection is performed only when a person gets on a rear seat of the car. 7 is a detecting means, 4 is a control means, and 5 is a motor. Reference numeral 8 denotes operation detection means for detecting the presence or absence of operation of the motor 5, and sends a signal to the detection means 7 when the motor 5 is rotating, and
From the controller 4 to the controller 4.

The operation of the air purifier configured as described above will be described below.

When a person is in the rear seat, a detection output is always output from the human body detection sensor 6 and is input to the detection means 7. In this case, the rotation speed of the motor 5 can be reduced by the control means 4. In this case, the operating noise of the air purifier is reduced. However, when there is no person in the rear seat, no detection output is output from the human body detection sensor 6, so that even if the motor 5 is rotated at full speed, the driving sound does not matter. However, if the signal of the detection means 7 is always output, the human body detection sensor 6 can detect only when the person is moving, and the detection signal may or may not be output. However, there is a possibility that the motor 5 operates at full speed even though a person is in the rear seat. For this reason, the operation detecting means 8
If the output of the detecting means 7 is stopped when the motor 5 is rotating, it is possible to prevent the rotation of the motor 5 from suddenly changing during operation.

As described above, according to the present embodiment, it is possible to prevent a sudden change in the driving sound during driving, so that a comfortable air cleaning operation can be performed.

An embodiment of the technical means described in claim 4 of the present invention will be described below with reference to FIG. In FIG. 4, reference numeral 9 denotes a transmitting unit for transmitting ultrasonic waves, infrared rays, etc., and reference numeral 10 denotes a receiving unit. When a signal from the transmitting unit 9 is reflected by the human body 11 and enters the receiving unit 10, the detecting unit 7 detects When a signal is sent to the control means 4, the control means 4 lowers the rotation speed of the motor 5.

As described above, according to the present embodiment, it is possible to provide a quiet in-vehicle air purifier capable of surely confirming whether or not a person is in the rear seat.

[0024]

As is apparent from the above embodiment, according to the technical means of the first aspect of the present invention, the smoking of the passenger in the rear seat makes the passenger in the rear seat quiet and comfortable. Can work.

Further, according to the technical means described in claim 2 of the present invention, it is possible to reliably detect that a person is on the rear seat and perform an appropriate air cleaning operation.

According to the third aspect of the present invention, the operation of the air purifier is stabilized and the operation is comfortable.
In can be carried out.

Further, according to the technical means described in claim 4 of the present invention, since the entry of a person in the rear seat can be detected most reliably, a quiet and comfortable in-vehicle air purifier can be provided.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a control circuit of a vehicle air purifier according to another embodiment of the present invention.

FIG. 3 is a block diagram of a control circuit of a vehicle air purifier according to another embodiment of the present invention.

FIG. 4 is a block diagram of a control circuit of an on-vehicle air purifier according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust sensor 2 Gas sensor 3, 7 Detecting means 4 Control means 5 Motor 6 Human body detecting sensor 8 Operation detecting means 9 Transmitting part 10 Receiving part

Continuation of front page (56) References JP-A-5-103934 (JP, A) JP-A-1-104323 (JP, A) JP-A-5-137930 (JP, A) JP-A-5-15719 (JP) JP-A-4-180809 (JP, A) JP-A-62-255219 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60H 3/06 B01D 46/44

Claims (4)

(57) [Claims] A dust sensor for detecting dust and a gas sensor for detecting gas are mounted, and the detection time of the gas sensor is compared with the detection time of the dust sensor. When the time difference is shorter than a predetermined value, the motor is turned on. An in-vehicle air purifier equipped with control means for reducing the air volume. 2. A human body detection cell <br/> vehicle air purifier of claim 1, further comprising a capacitors over to detect only human back seat. 3. A human body detection sensor for detecting only the human back seat, vehicle air purifier of claim 1, further comprising the OPERATION detecting means for detecting the rotation of the motor Ta. 4. A receiver for receiving an output of the transmitter portion through the human back seat, vehicle air purifier of claim 1, wherein the example Bei <br/> the detection means to detect the output of the receiver.