JPH0825384B2 - Vehicle air purifier - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying device, and more particularly to an air purifying device suitable for purifying air in a passenger compartment of a vehicle.

(Prior Art) Conventionally, in this type of air purifying apparatus, when the smoke in the vehicle compartment of the vehicle is detected, the air in the vehicle compartment is automatically purified, or as disclosed in Japanese Utility Model Laid-Open No. 57-67817. As described above, there is a system in which infrared rays emitted during smoking in the passenger compartment are converted into an electric signal and the air in the passenger compartment is automatically purified by the electric signal.

(Problems to be Solved by the Invention) However, in such a configuration, usually, the main body of the air cleaning device is at a position where it is difficult for smoke to reach its built-in sensor, such as an existing stay of a room lamp, or time to reach it. Since it is mounted at a required position, there is a problem that it is difficult to purify air with good responsiveness.
On the other hand, there is a device in which the operation of the operation switch attached to the main body of the air purifying device is performed to clean the air in a timely and reliable manner, but the operation switch of the main body of the air purifying device is hard to reach the occupants. When in the position, it feels very inconvenient to operate the operation switch. Further, such inconvenience is remarkable when the driver tries to operate the operation switch while smoking while driving the vehicle.

In addition, since the power supply to the sensor of the air purifying apparatus body as described above is usually ensured even when the ignition switch of the vehicle is opened, it is not possible to park the vehicle for a long time. However, there is a problem that battery power is consumed unnecessarily.

Therefore, the present invention addresses the above-mentioned problems by
In an air cleaner for a vehicle, an optical detecting means is adopted, and while the effective operating period of the optical detecting means is limited only when necessary, the inside of the vehicle compartment is detected by detecting a part of the body of an occupant by the optical detecting means. It seeks to purify the air.

(Means for Solving the Problem) In solving the problem, the structural feature of the present invention is to purify the air in the passenger compartment of the vehicle in the operating state and stop the purification of the air in the non-operating state. In an air purifying apparatus having a purifying means for controlling, a first detecting means for detecting an operation of an engine of a vehicle, a second detecting means for detecting this when a door of a vehicle is opened, and a vicinity of an occupant in a vehicle compartment. And a third detecting means for optically detecting the intervention of a part of the body of the occupant in the operating state and stopping the detection in the non-operating state, and the detection content of the first detecting means. When the operation of the engine is started, the third detecting means is put into an operating state, and when the content detected by the first detecting means corresponds to the stop of the engine, the third detection is performed in response to the detection of the second detecting means. A control hand that controls the means to deactivate it The cleaning means is activated in response to the optical detection of the third detection means, and the cleaning means is activated in response to another optical detection of the third detection means after the optical detection. And a drive means for driving so as to keep it in an inoperative state.

(Advantageous effects) Thus, by configuring the present invention in this way,
When the engine starts operating, the first detecting means detects that the engine starts operating, and in response thereto, the control means puts the third detecting means into an operating state. In this state, when the occupant smokes and extends his hand to cause the third detecting means to optically detect the intervention of the occupant's hand, the driving means operates the cleaning means in response to the optical detection. Put in the state. Therefore, the air in the vehicle compartment can be appropriately purified by the cleaning means with good responsiveness. In such a case, since the third detecting means is located in the vicinity of the occupant, the occupant can ensure the optical detection of the third detecting means by merely reaching for the occupant and the vehicle by the purifying means. It is possible to accurately and accurately purify indoor air. This can likewise be achieved if the driver smokes while driving the vehicle.

After the purification as described above, if the occupant extends the hand again and causes the third detecting means to optically detect the intervention of the occupant's hand,
The drive means deactivates the cleaning means in response to the optical detection. As a result, the cleaning action of the cleaning means is stopped.

After that, when the engine is stopped and the door is opened, the first detecting means detects the stop of the engine, the second detecting means detects the opening of the door, and the control means detects the first and second doors. In response to both detections by the second detection means, the third detection means is deactivated. In other words,
Since the effective operating state of the third detection means is ensured only when the occupant needs it, the power supply to the third detection means is always performed for a necessary and sufficient time, and as a result, the power source such as the battery is supplied. Unnecessary power consumption can be surely suppressed.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings, and FIGS. 1 to 4 show the overall configuration of an air cleaning device for a vehicle 10 according to the present invention. As shown in FIG. 1 and FIG. 2, this air purifier includes an air purifier S, which is located above the driver's seat in the passenger compartment of the vehicle 10 and in front of its upper wall 11. It is arranged at the edge. As shown in FIGS. 1 and 2, the air purifier S is provided with a casing 20, and the casing 20 has a base portion 12a of the rearview mirror 12 and a top wall 11 at a central portion 21 of the bottom wall thereof. An approximately crank along the front edge of the bracket 13 and the inner plate 11b of the upper wall 11 from the space between the bracket 13 (room mirror mounting member) fixed to the front edge of the outer plate 11a toward the rear. Support plate 1
The rear portion 14a of the 4 is supported from below by fastening screws 14b. However, the base portion 12a of the rearview mirror 12 is attached to the central portion of the bracket 13 from below by fastening the screw 12b through the front portion 14c of the support plate 14. Also, room lamp 15
Is attached to the base 12a of the room mirror 12 from below. 1 and 2, reference numeral 16 indicates a front windshield of the vehicle 10.

Further, the air purifier S is equipped with an infrared sensor 30 as shown in FIGS.
Is provided in an opening 21 formed in the rear portion of the casing 20 as shown in FIG. The infrared sensor 30 has a pair of infrared light emitting diodes 31 and 32 and a phototransistor 33, and the infrared light emitting diodes 31 and 32 and the phototransistor 33 have openings 21 at their respective bases. The printed circuit board 34 fixed to the bottom wall of the is soldered at intervals from the lower side to the upper side. Dual infrared light emitting diode
A light shielding partition wall 35 is formed between 31, 32, while a light shielding partition wall 36 is formed between the infrared light emitting diode 32 and the phototransistor 33. A transparent cover 37 is provided at the opening end of the opening 21 to cover both the infrared light emitting diodes 35 and 36 and the phototransistor 34. Then, in the infrared sensor 30 thus configured,
When both the infrared light emitting diodes 31 and 32 are conducted, the infrared light generated from the both infrared light emitting diodes 31 and 32 passes through the transparent cover 37 and spreads toward the rear as shown by the dashed line in FIG. Progress in a shape. Further, when the infrared light from each of the infrared light emitting diodes 31 and 32 is reflected and enters the phototransistor 33, the phototransistor 33 conducts according to the amount of received light and generates a light receiving signal.

In addition, as shown in FIG. 4, the air purifying device includes a self-reset type push button switch 40a and a micro switch 40b attached to the casing 20, a mode selector switch 50 and an air volume selector switch provided near the driver's seat in the passenger compartment. 60, a door switch 70 attached to the door of the vehicle, an automatic mode control circuit 80 built in the casing 20, an infrared sensor control circuit
90 and a drive circuit 100, and a blower having an electric motor M, the push button switch 40a is temporarily closed under the manual mode of the device of the present invention to generate an operation signal. The micro switch 40b is closed when the lid of the casing 20 is closed, and is opened by opening the lid.

The mode selector switch 50 is closed (or opened) when the device of the present invention is placed in the automatic mode (or manual mode). The air volume changeover switch 60 is opened (or closed) when the electric motor M is placed in the low speed mode (or the high speed mode). The door switch 70 is closed (or opened) by opening (or closing) of the door to generate (or disappear) a door detection signal.
Let it.

The automatic mode control circuit 80 has its first input terminal 81
It is connected to the positive terminal of the battery B via the mode switch 50 and the micro switch 40b, and the second input terminal of the automatic mode control circuit 80 is grounded via the door switch 70. Then, the automatic mode control circuit 80 is activated by receiving the DC voltage Vb from the battery B through the micro switch 40b and the mode changeover switch 50. Further, in the automatic mode control circuit 80 in the operating state,
The fluctuation of the DC voltage Vb at the time of starting the engine of the vehicle is detected, and the operation control signal necessary for keeping the infrared sensor 30 in the operating state is generated. Further, a constant fluctuation of the DC voltage Vb in the operating state of the engine when the door switch 70 is closed is sent by the automatic mode control circuit 80 to maintain the generation of the operation control signal. Also, the door switch 70
The automatic mode control circuit 80 detects that the fluctuation of the DC voltage Vb has stopped due to the stop of the engine under the closing condition of (1), and causes the operation control signal to disappear.

The infrared sensor control circuit 90 puts the infrared sensor 30 into an operating state in response to the operation control signal from the automatic mode control circuit 80. This means that both infrared light emitting diodes 31, 32 of the infrared sensor 30 are placed in a conducting state. Also,
The infrared sensor control circuit 90 receives a light reception signal from the phototransistor 33 of the infrared sensor 30 and generates (or disappears) an output signal necessary for driving the electric motor M. When the operation control signal from the automatic mode control circuit 80 disappears, the infrared sensor control circuit 90 puts the infrared sensor 30 into the inactive state. This means that both infrared light emitting diodes 31, 32 are placed in a non-conducting state.

The drive circuit 100 is connected at its first input terminal 101 to the positive terminal of the battery B via the microswitch 40b, and the second input terminal 102 of this drive circuit 100 is grounded via the door switch 70. Has been done. In addition, the drive circuit 100 has a relay 103, and this relay 103 has a magnetic coil 10
The normally open switch 103b is closed (or opened) by the excitation (or demagnetization) of 3a. In such a case, the electromagnetic coil 103a is excited in response to the output signal from the infrared sensor control circuit 90, and the same output in response to the light receiving signal from the infrared sensor 30 after the output signal from the infrared sensor control circuit 90 is generated. Degaussed when the signal disappears.

Thus, the drive circuit 100 applies the DC voltage Vb to the electric motor M via the normally open switch 103b when the normally open switch 103b is closed while receiving the DC voltage Vb from the battery B via the micro switch 40b. To do. In addition, the drive circuit 100
Is in response to the first operation signal from the push button switch 40a when the mode changeover switch 50 is open.
The DC voltage Vb from is applied to the electric motor M while self-holding. Further, when the operation signal is generated again from the push button switch 40a, the drive circuit 100 releases the self-holding and stops applying the DC voltage Vb to the electric motor M. When the door switch 70 is closed in the self-holding state, the drive circuit 10
0 forcibly cancels the self-holding state.

The electric motor M receives the DC voltage Vb and rotates, and the blower removes the air inside the vehicle to the outside of the vehicle. In such a case, the electric motor M is in the high speed mode when the air volume changeover switch 60 is closed, and in the low speed mode in relation to the resistance r when the air volume changeover switch 60 is open. The room lamp 15 is constantly lit by receiving the DC voltage Vb from the battery B while being switched to one of the attached changeover switches 15a, and the changeover switch 15a is also turned on.
When the door switch 70 is closed under the switching to the other, the battery B receives the DC voltage Vb and lights up.

In the present embodiment configured as described above, time t =
When it is 0 (see FIG. 5), when the door of the vehicle 10 is closed and the micro switch 40b and the mode changeover switch 50 are closed and the engine of the vehicle 10 is started, the automatic mode control circuit 80 changes the battery B from the battery B. The variation of the DC voltage Vb received through the micro switch 40b and the mode changeover switch 50 with the start of the engine is detected at 0 ≦ t ≦ t ₁ (see FIG. 5), and at t = t _{1, the} operation control signal (hereinafter, The operation control signal Vs (see FIG. 5) is generated. Then, the infrared sensor control circuit 90 sets the infrared sensor 30 in the operating state in response to the operation control signal Vs from the automatic mode control circuit 80. As a result, both infrared light emitting diodes 31 and 32 of the infrared sensor 30 emit light as indicated by the alternate long and short dash line in FIG.

Then, while the vehicle 10 is running, the occupant in the rear seat of the vehicle 10 starts smoking at t = t ₂ (see FIG. 5), and at the same time, as shown in FIG. When the light from 32, 32 is reflected, this reflected light is
Received by 33. Then, this phototransistor 33
Responds to the received light to generate a light reception signal (hereinafter referred to as light reception signal Vr. See FIG. 5), and in response thereto, the infrared sensor control circuit 90 outputs an output signal (hereinafter referred to as output signal Vout. (See). Next, the relay 103 of the drive circuit 100 outputs the output signal Vou from the infrared sensor control circuit 90.
Normally open switch 1 due to excitation of electromagnetic coil 103a in response to t
03b is closed, and the electric motor M is started by receiving the DC voltage Vb from the battery B through the micro switch 40b and the normally open switch 103b of the drive circuit 100. As a result, the blower discharges and purifies the air in the vehicle interior to the outside with good responsiveness according to the rotation speed of the electric motor M.

In such a case, since the light emitting region of the infrared sensor 30 is located in the vicinity of the occupant, the occupant can generate a light receiving signal from the infrared sensor 30 simply by extending his or her hand into the light emitting region as it is, and The air in the vehicle interior can be purified by the blower with good responsiveness and accuracy. This can also be achieved when the driver sitting in the driver's seat smokes while driving the vehicle 10. The electric motor M is placed in the high speed mode (or the low speed mode) in response to the closing (or opening) of the air volume changeover switch 60.

After that, when the vehicle 10 is stopped at t = t ₃ (see FIG. 5) and the door is opened temporarily, the door switch 70 causes the door detection signal (hereinafter referred to as the door detection signal Vd. See FIG. 5). ) Is generated, and in response thereto, the automatic mode control circuit 80 detects that the fluctuation of the DC voltage Vb from the battery B is constant for t ₃ ≦ t ≦ t ₄ and generates the operation control signal Vs. maintain. Therefore, the operating state of the infrared sensor 30 is maintained as it is. However, the door detection signal Vd from the door switch 70 is t =
It disappears at t ₄ . Then, at t = t ₅ (see FIG. 5), when the occupant reflects the light from both infrared light emitting diodes 31 and 32 in the same manner as described above, the phototransistor 33 causes the photodetection signal Vr to be received.
In response to this, the infrared sensor control circuit 90
Causes the output signal Vr to disappear, and the relay 103 causes the electromagnetic coil 103a.
The normally open switch 103b is opened by degaussing, and the blower stops the purification of the air inside the vehicle by stopping the electric motor M.

Then, at t = t ₆ (see FIG. 5), when the infrared sensor 30 generates the light reception signal Vr in the same manner as described above, the infrared sensor control circuit 90 generates the output signal in the same manner as described above, and the infrared sensor control circuit 90 generates the output signal. The normally open switch 103b is closed. Therefore, the blower purifies the air in the vehicle compartment while the electric motor M is rotating. Next, when the engine stops at t = t ₇ and the door detection signal Vd is generated from the door switch 70 at t = t ₈ , the automatic mode control circuit 80 indicates that the DC voltage Vb from the battery B is unchanged. and detects, it detects occurrence between door detection signal Vd of _{t 8 ≦ t ≦ t 9,} t = abolished the operation control signal Vs at t _9, the infrared sensor control circuit 90 is the output signal in response thereto Vout is extinguished and the infrared sensor 30 is kept inactive. Therefore, both the infrared light emitting diodes 31 and 32 are non-conductive. In such a case, since the operation period of the infrared sensor 30 is limited to t ₁ ≤t≤t ₉ ,
Unnecessary power consumption in 30, that is, the unnecessary power consumption of the battery B can be reduced.

Further, in the above-mentioned operation, when the mode changeover switch 50 is in the open state, when the operation signal is generated from the push button switch 40a, the drive circuit 100 receives the DC voltage Vb from the battery B via the micro switch 40b. Self-hold and apply to the electric motor M. After that, pushbutton switch 40
When the operation signal is generated again from a, the drive circuit 100
The application of Vb to the electric motor M is stopped. Further, when the door detection signal Vd is generated from the door switch 70 during the application of the DC voltage Vb to the electric motor M as described above, the drive circuit 100 forcibly cancels the self-holding and the DC voltage Vb to the electric motor M is increased. Stop granting.

In addition, in the above-mentioned embodiment, the dual infrared light emitting diode is used.
Although the light from 31, 32 is reflected and made incident on the phototransistor 33, instead of this, the light from both infrared light emitting diodes 31, 32 is made incident on the phototransistor 33, and this incident is It may be possible to achieve substantially the same effect as the above embodiment by blocking.

In addition, the practice of the present invention is not limited to the infrared sensor 30, and may be implemented by employing an optical detection unit having various light emitting and receiving elements.

Further, in carrying out the present invention, when the room lamp is located at the center of the upper wall 11, the air purifier S is mounted in the same manner as in the above embodiment by utilizing the existing member for mounting the room lamp. May be.

In addition, in the embodiment of the present invention, the infrared sensor is configured to set the electric motor M to the low speed mode, the high speed mode, or the stop mode in accordance with the number of times the light receiving signal from the infrared sensor 30 is generated, without depending on the air volume changeover switch 60. Control circuit
It may be controlled by 90 and the drive circuit 100.

[Brief description of drawings]

FIG. 1 is a view showing a state in which the air purifier of the present invention is attached to the interior of a vehicle, FIG. 2 is an enlarged view of a main part of the attached air purifier, and FIG. 3 is an enlarged view of an infrared sensor. FIG. 4 is an electric circuit diagram of the present invention, and FIG. 5 is a time chart of outputs of main constituent elements in FIG. Explanation of code 10 …… Vehicle 30 …… Infrared sensor 70 …… Door switch 80 …… Drive circuit 90 …… Infrared sensor control circuit 100 …… Drive circuit M …… Motor S …… Air purifier

Claims (1)

[Claims] Claim: What is claimed is: 1. An air purifying apparatus, comprising: a purifying means for purifying air in a vehicle compartment of a vehicle in an operating state and stopping the purification of the air in a non-operating state, detecting an operation of a vehicle engine. 1 detection means, a second detection means for detecting when the door of the vehicle is opened, and a second detection means arranged in the vehicle interior in the vicinity of the occupant to optically intervene a part of the occupant's body in an operating state. And a third detection means for stopping the detection in an inoperative state, and when the detected content of the first detection means corresponds to the start of operation of the engine, the third detection means is placed in an activated state, and Control means for controlling the third detection means to be inactive in response to the detection of the second detection means when the content detected by the first detection means corresponds to the stop of the engine; and the third detection means. Activating the cleaning means in response to the optical detection of And a driving means for driving the cleaning means in an inoperative state in response to the optical detection of the third detection means after the optical detection. Air cleaning device.