JP3106257B2 - air cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner and, more particularly, to an air cleaner used in a vehicle such as a passenger car used in ordinary households or used in a small room such as a small reception room.

[0002]

2. Description of the Related Art In a conventional air cleaner, a gas sensor installed in a place affected by wind detects dirt in the air, and the driving of the fan is controlled by the signal.
The dirt of the air is not uniform even in a small room such as the interior of a passenger car, and the output of the gas sensor changes due to the influence of the position of a person or the wind of a fan. That is, while the fan is operating, the output of the gas sensor changes due to the wind, and the output fluctuates again when the fan stops, so the gas sensor does not faithfully detect the dirt of the air in the entire small room such as in the car. Did not. Therefore, the air cleaner often performs an operation that does not match the actual feeling.

[0003]

The problem with the conventional air cleaner is that the output of the gas sensor for controlling the driving of the fan changes due to the wind of the driving fan, and changes again when the driving of the fan stops. Met. Therefore, the air cleaner did not operate faithfully to the actual air contamination in a small room such as a vehicle.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an air cleaner driven by increasing the fidelity according to the actual contamination of air.

[0005]

In order to achieve the above object, an air cleaner according to the present invention comprises a gas sensor for detecting contamination of air, a gas sensor processing means for processing an output of the gas sensor, and a gas sensor processing means. , A timer means for measuring time by a signal from the control means, and an AND for driving a fan motor by a logical product of a signal from the control means and a signal being counted by the timer means Output means.

[0006]

According to the present invention, the operation can be performed based on the output value of the gas sensor whose output is changed due to the true dirt of the air which is not affected by the wind by the fan.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) The means shown in FIG. 1 is a means of a vehicle-mounted air cleaner according to an embodiment of the present invention, 1 is a motor for driving a fan, 2 is a gas sensor for detecting dirt of air in the car, and its output is a gas sensor processing means. 3 is processed. The output of the gas sensor processing means 3 is received by the control means 4, and the motor 1 is driven by the logical product of the signal of the timer means 5 for measuring the time with the signal from the control means 4 and the signal from the control means 4. There is AND output means 6.

Next, the operation will be described with reference to FIGS. 1 and 2 and assuming numerical values for convenience. Assuming that the initial value of the gas sensor is 100 kΩ, the fan operates at a low airflow (LOW) during the period of FIG. In the operation of each means during the period a, the output value of the gas sensor 2 is 85 kOhm, and the gas sensor processing means 3 receiving the output value compares it with the initial value.
If the W signal is 0.70 or less, the HI signal is output to the control means 4 respectively. (The output value of the gas sensor 1 decreases when the dirt is detected. The higher the concentration of the dirt, the lower the output value.) The control unit 4 receiving this signal sends a signal to the AND output unit 6. At this time, the signal from the control means 4 is not output to the timer means 5. The AND output means 6 receiving the LOW signal outputs “H” by the output from the timer means 5 (“H” when the signal from the control means 4 is not received). Output.

Next, since the output value of the gas sensor 1 becomes 93 kΩ or more at the time point b in FIG. 2, the gas sensor processing means 3 outputs a stop signal to the control means 4. In response to this, the control means 4 sends a signal to the AND output means 6, and the AND output means 6 receiving the signal stops the motor 1 because the output from the timer means 5 is "H". At this time, the control means 4 sends a clock signal to the timer means 5.
The timer means 5 to which the clock signal is sent (for example, 5 minutes)
The signal "L" is output to the AND output means 6 (the "L" output continues during the clocking).

During the period c, the output value of the gas sensor 2 becomes 93
There is a place where the value is lower than kiloohm, but this is the influence of the wind by the fan. During this time, the air is not dirty and the output value of the gas sensor 2 is changed by the wind. Therefore, if the change in this period is input as it is and processed, the operation starts again, and an operation that does not actually match occurs. Therefore, the output of the timer unit 5 to the AND output unit 6 is measured for a predetermined time (5 minutes). It is kept at "L" until the operation is completed, and the motor 1 is stopped.

As a result, an operation that is actually suitable can be performed. (Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described with reference to FIGS.

As shown in FIG. 3, the on-vehicle air cleaner includes a motor 7 for driving a fan, a gas sensor 8 for detecting dirt in the air, gas sensor processing means 9 for processing the output of the gas sensor 8, and a gas sensor processing means 9. Control means 1 for receiving an output and sending a signal to AND output means 10
1, a correction timer means 12 for measuring time by a signal from the control means 11, a timer means 13 for measuring time by a signal from the control means 11 and sending a signal to the AND output means 10; That drives the motor with the logical product of the signal from the controller 11 and the signal from the controller 11
D output means 10 is provided.

Next, this operation will be described assuming numerical values for convenience. For example, the initial value of the gas sensor 8 is 10
Assuming 0 kOhm, the air volume is LOW at the point of d in FIG.
To start the operation. At this time, the operation of each means is as follows. The output value of the gas sensor 8 is 93 kOhm, and the gas sensor processing means 9 receiving it outputs a low signal if the output value is 0.93 or less and 0.70 or less. If so, the HI signal is output to the control means 11 respectively. (The output value of the gas sensor 8 for detecting dirt decreases, and the output value decreases as the concentration of dirt increases.)
1 sends a LOW signal to the AND output means 10. Also,
At this time, no signal is output to the timer means 13,
A clock signal is output only to the correction timer means 12. The correction timer means 12 which has received the clock signal starts clocking.
The AND output means 10 receiving the LOW signal outputs “H” by the output from the timer means 13 (“H” when no signal is received from the control means 11).
The W signal is output to the motor 7 as it is.

Next, in FIG.
Is 93 kΩ or more, the gas sensor processing means 9 outputs a stop signal to the control means 11. In response to this, the control means 11 sends a signal to the AND output means 10, which stops the motor 7 because the output from the timer means 13 is "H". At this time, the control means 11 inputs the time measured by the correction timer means 12 which has been measuring the time, and determines the time measured by the timer means 13 based on this time. (For example, when the time measured by the correction timer 12 is 10 minutes and 5 minutes, the time measured by the timer 13 is determined to be 5 minutes and 2.5 minutes, respectively.)
Then, a time signal is sent to the timer means 13. (For example,
Assume that the time measured by the correction timer means 12 is 10 minutes, and the time is assumed to be 5 minutes.)
Outputs the signal "L" to the AND output means 10 for 5 minutes (the "L" output continues during the timing).

The time measured by the timer means 13 is changed by the time measured by the correction timer means 12. The time measured by the correction timer means 12 is the time during which the motor 7 is operating, and the gas sensor 8 Is the time affected by the wind, so the longer the time, the more the motor 7
The time from the stop of the operation to the end of the influence of the wind is long (compare A and B in FIG. 4).

Therefore, the time measured by the timer 13 is changed according to the time measured by the correction timer 12.
Next, in the period f, there is a place where the output value of the gas sensor is lower than 93 kΩ. This is due to the effect of the wind from the fan. During this time, the output value of the gas sensor 8 is changed by the wind instead of the air being dirty. Is what you are doing. Therefore, if the change in this period is input and processed as it is, the motor drive operation starts and an operation that does not actually occur occurs.
The output to 0 is set to "L" until the time measurement corresponding to the time measurement by the correction timer means 12 is completed, and the motor 7 is stopped.

[0017] Thereby, the operation of the air cleaner which is more suitable can be performed. (Embodiment 3) Hereinafter, Embodiment 3 of the present invention will be described with reference to FIGS.

As shown in FIG. 5, the on-vehicle air cleaner includes a motor 14 for driving a fan, a gas sensor 15 for detecting air contamination, gas sensor processing means 16 for processing the output of the gas sensor 15, and a gas sensor processing means 1 as shown in FIG.
6, a control means 18 for sending a signal to an AND output means 17, a correction timer means 19 for counting time by a signal from the control means 18, a divided timer means 21, and a motor provided by the output of the divided timer means 21. Adding means 2 for detecting the state of No. 1 and adding a predetermined value to output to the control means 18
2. Timer means 20, which also measures time with a signal from the control means 18 and sends a signal to the AND output means 17,
It comprises an AND output means 17 for driving the motor by the logical product of the timer means 20 and the signal from the control means 18.

Next, this operation will be described by assuming numerical values for convenience. For example, assuming that the initial value of the gas sensor is 100 kOhm, the operation starts at a low air flow rate at the time point g in FIG. At this time, the operation of each means is as follows. The output value of the gas sensor 15 is 93 kOhm, and the gas sensor processing means 16 receiving it outputs a low signal if the output value is 0.93 or less and 0.70 or less. If so, the HI signal is output to the control means 18 respectively. (The output value of the gas sensor 15 decreases when it detects dirt, and the output value decreases as the concentration of dirt increases.) The control unit 18 that has received the signal sends a LOW signal to the AND output unit 17. At this time, no signal is output to the timer means 20, and the correction timer means 19 and the divided timer means 2 are not output.
1 outputs a timing signal. The correction timer unit 19 and the division timer unit 21 that have received the clock signal start clocking.
Since the AND output means 17 having received the LOW signal is at “H” by the output from the timer means 20 (“H” when no signal is received from the control means 18),
The W signal is output to the motor 14 as it is.

Assuming that the time counted by the division timer means 21 is, for example, 10 seconds, an output is sent to the addition means 22 after 10 seconds have elapsed from the start of the time measurement.
Start timing 0 seconds. The adding means 22 receiving this detects the current operation of the motor (operates at LOW), and adds "1" for LOW operation and "2" for HI operation (this In case, add “1”).

Next, at the time point h, the output value of the gas sensor 15 becomes 93 kΩ or more.
Outputs a stop signal to the control means 18. Upon receiving this, the control means 18 sends a signal to the AND output means 17, and
The output means 17 outputs "H" from the timer means 20.
Therefore, the motor 14 is stopped. At this time, the control means 18 inputs the measured time of the correction timer means 19 which has been measuring the time and the added value of the adding means 22, and uses this value as a timer means
Decide the time to measure.

[0022]

[Table 1]

(For example, assuming that the time counted by the correction timer 19 is 10 minutes and the added value of the adding means 22 is 68, the time counted by the timer 20 is 3 minutes.) Then, a time signal is sent to the timer 20. The timer means 20 to which the clock signal has been sent outputs a signal “L” to the AND output means 17 (the “L” output continues during the clocking).

Here, the time measured by the timer means 20 is changed by the time measured by the correction timer means 19 and the added value of the adding means 22. The time measured by the correction timer means 19 is determined by the operation of the motor 14. The time during which the addition value of the adding means 22 indicates the degree of wind intensity during that time, and indicates how much wind the gas sensor 15 has received for how long. The longer the time and the larger the value, the longer the time from when the motor 14 is stopped until the influence of the wind is eliminated. Therefore,
The time measured by the timer 20 is changed according to the time measured by the correction timer 19 and the value added by the adder 22.

Next, during the period f, the gas sensor output value becomes 93
There is a place where the pressure is lower than the kilo-ohm, but this is the effect of the wind by the fan. During this time, the air is not dirty and the output value of the gas sensor 15 is changed by the wind. Therefore, if the change in this period is input as it is and processed, the driving operation starts and an operation that does not actually occur occurs. Therefore, the output to the AND output unit 17 of the timer unit 20 is changed according to the time measured by the correction timer unit 19. The time is kept at "L" until the end of the time measurement, and the motor 14 is stopped.

As a result, it is possible to perform an operation that is actually more suitable.

[0027]

As is clear from the above embodiments, according to the present invention, it is possible to provide an air cleaner driven by increasing the fidelity according to the actual air contamination regardless of the influence of wind.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of a vehicle air cleaner according to a first embodiment of the present invention.

FIG. 2 is a gas sensor output diagram of the in-vehicle air cleaner.

FIG. 3 is a circuit block diagram of a vehicle-mounted air cleaner according to a second embodiment of the present invention.

FIG. 4 is an output diagram of a gas sensor of the vehicle air cleaner.

FIG. 5 is a circuit block diagram of a vehicle-mounted air cleaner according to a third embodiment of the present invention.

FIG. 6 is an output diagram of a gas sensor of the vehicle air cleaner.

[Description of Signs] 1, 7, 14 Motors 2, 8, 15 Gas sensors 3, 9, 16 Gas sensor processing means 6, 10, 17 AND output means 4, 11, 18 Control means 5, 13, 20 Timer means 12, 19 Correction timer means 21 Division timer means 22 Addition means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 46/46 B01D 53/30 B60H 3/06

Claims (3)

(57) [Claims] 1. A gas sensor for detecting contamination of air, a gas sensor processing means for processing an output of the gas sensor, a control means for receiving an output of the gas sensor processing means, and a timer for measuring time by a signal from the control means. Means,
An air cleaner comprising AND output means for driving a fan motor by a logical product of a signal from the control means and a signal being counted by the timer means. 2. The air cleaner according to claim 1, further comprising correction timer means for measuring a driving time of the motor in response to a signal from the control means and correcting the time counted by the timer means based on the measured time. 3. A division timer means for receiving a signal from the control means and outputting a signal obtained by dividing the driving time of the motor into unit time, and a correction timer means for inputting a signal of the motor being driven and the divided signal. 3. An air cleaner according to claim 2, further comprising an adding means for determining an added value to be added to the correction time.