JP3298118B2 - Automotive air cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, on d A cleaner.

[0002]

2. Description of the Related Art In recent years, interest in dirt in vehicles has been increasing, and air purifiers have attracted attention, and those having an advanced function and an automatic operation function using various sensors have become mainstream. Many of them have a function of displaying a filter replacement sign.

[0003]

However, since such a conventional air purifier is used in a vehicle, it is difficult to know when the engine will stop, and if the degree of use is written in the storage means at predetermined time intervals, If the engine is turned off before writing, the predetermined degree remains "0" forever. Further, if the writing time is too short, the number of writing times of the storage means reaches the end of its life before the product warranty period.

That is, in such an in-vehicle air cleaner, there is a problem that the filter cannot be stained, the product cannot be guaranteed if the writing time to the storage means is shortened, and the display is difficult to see due to the amount of sunlight. Had the disadvantage of becoming

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an in-vehicle air cleaner which can be assured as a product and which can reliably detect the dirt condition of a filter and which has an easy-to-read display.

[0006]

According to the present invention, in order to achieve the above object, a first object of the present invention is to detect dirt.
A dirt detection means, a first timer for measuring time,
Within a predetermined time period measured by the first timer at predetermined time intervals.
The degree of dirt detected by the dirt detection means is integrated, and the product
First storage means for storing a calculation result, wherein the first storage means
The interval stored in the means is extended .

[0007] In the second means for solving the problem, time measurement is performed.
The second timer to be performed and the time measured by the second timer are described.
A fourth storage means is provided for storing the time measured by the first timer.
It is determined based on the stored value stored in the fourth storage means.
It is obtained by sea urchin.

[0008] Further, in the third means for solving the problem, the surrounding thick- ness is improved.
When replacing the light detection means to detect the amount of sunlight and the filter
Display means for displaying the period, and the output of the light detection means
The display brightness of the display means is changed accordingly .

[0009]

According to the present invention, with the above arrangement, the first solving means integrates the degree of dirt detected by the dirt detecting means.
The interval at which the results are stored in the first storage means is changed over time.
Stretched by going, Ru can be reduced output (writing) the number of the first storing means.

[0010] Also, the fourth memory means is provided by a fourth memory means.
Depending on the time measured by the second timer stored in the column, the first
Since the counting time of the timer is set , the writing time cycle to the first storage means can be adjusted in combination with the past use state, and writing can be performed with a smaller number of writings.

Further, according to the third solution, the peripheral thick
When changing the filter by the display means according to the amount of sunlight
By changing the brightness of the period display, the display can be displayed more easily regardless of the state of sunlight.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the on-vehicle air cleaner has a dirt detecting means 1 for detecting dirt in the vehicle, a first timer 2 for measuring time, and a second storing a plurality of predetermined values.
Storage means 3, third storage means 4, control means 6 for inputting and processing output signals of second storage means 3, dirt detection means 1 and first timer 2, and first storage means for storing the output of control means 6 5, the output value of the first storage means 5 and the third storage means 4
And a display means 8 for performing display based on the output of the comparison means 7.

Next, the operation of the above configuration will be described.
When the engine of the car starts rotating, the control means 6 outputs time measurement data to the first timer 2, and the first timer 2 receiving this output starts time measurement (for example, one minute). At the same time, the first timer 2 outputs an output to the control means 6 every second predetermined time (for example, 10 seconds). The dirt detecting means 1 always outputs an output to the control means 6.
The control means 6 uses the output of the first timer 2 every 10 seconds to
It is determined at which level of the plurality of predetermined values in the second storage means 3 the most dirty value in 0 second is located. When the above operation is performed six times, the time counted by the first timer 2 (1 minute) elapses. At the sixth time, the control means 6 determines which level of the plurality of predetermined values of the second storage means 3 the output of the dirt detection means 1 is in the same manner as before, and here, the first storage means The total of the six level values so far is output to the means 5. The comparison means 7 receives the output of the first storage means 5 and a predetermined value of the third storage means 4 and compares them.
If the output is large, a display signal is output to the display means 8.

Since the engine has not been turned off for one minute, the control means 6 again controls the first timer 2
The first timer 2 outputs a time signal of, for example, 3 minutes. However, the second predetermined time (10 seconds) is not changed (may be). Then, the same operation as described above is performed under this condition. After three minutes have elapsed, the interval stored in the first storage means 5 is extended, for example, eight minutes and twelve minutes. Also, if the engine is turned off during this time, restart from the first minute.

The above operation is continued, and when the output of the control means 6 becomes larger than the output of the third storage means 4, the comparing means 7 sends a display signal to the display means 8 and the display signal is used for the display. Means 8 performs display.

As described above, the number of times of writing in the first storage means 5 can be reduced, and the stain detection means 1 can be reduced.
, The degree of contamination of the filter according to the output can be detected and displayed, so that an operation suitable for the feeling of use can be performed.

Next, a second embodiment of the present invention will be described with reference to FIG.

As shown in the figure, a difference from the first embodiment is that a second operation for measuring the operation time and outputting it to the control means 6 is performed.
The difference is that a timer 9 and a fourth storage means 10 for storing the output value of the control means 6 are provided. The other parts are the same.

The operation of the above configuration will be described. When the engine of the car starts rotating, the control means 6 outputs the measured time data to the first timer 2 and the second timer 9. Upon receiving the output, the first timer 2 starts counting time (for example, one minute) and sends an output to the control means 6 every second predetermined time (for example, 10 seconds). Further, the second timer 9 starts measuring time with the above output from the control means 6. Then, in the same manner as in the first embodiment, the control means 6 determines the constant output of the dirt detection means 1 every 10 seconds, outputs the sum of the level values to the first storage means 5, and outputs the sum of the level values to the third storage means 4. If the output of the control means 6 is larger than the value, a display signal is output to the display means 8. Then, if the engine has not been turned off during this one minute, a clock signal is sent to the first timer 2 again. At this time, the second predetermined time is not changed. (May be).

Now, the measured time output to the first timer 2 is determined as follows.

That is, when the engine of the car is started, the second timer 9 starts measuring the time by the output of the control means 6. However, the second timer 9 measures the time until the engine is turned off. The data stored in 10 is output to the control means 6. And the second timer 9
Receives the signal from the control means 6, ends the time measurement, and outputs the time measured so far to the control means 6. The control means 6 having received this signal outputs the data by averaging the output from the fourth storage means 10 and the output of the clocking time, and the fourth storage means 10 having received the output stores the data. This data is an average of the time taken by the engine, and the next time measurement time (time until writing to the first storage means 5) is determined based on the data of the average time. For example, if this data is for 15 minutes, it is set to 1, 6, 13 minutes.

In this way, the time to be output to the first timer 2 is determined, and 6 minutes of data are output to the second storage means 3. Then, the above operation is continued.

Thereafter, when six minutes have elapsed, the interval stored in the first storage means 5 is extended, for example, to 13 minutes.
If the engine is turned off during this time, start again from the first minute.

Continuing the above, the comparing means 7 sends a display signal to the display means 8 and performs display when the output of the first storage means 5 becomes larger than the output of the third storage means 4.

Thus, the input of the output of the dirt detecting means 1 to the first storage means 5, that is, the writing time period is adjusted according to the past use state, and the life of the first storage means 5 is ensured by reducing the number of writing times. In addition, it is possible to perform an operation that matches the feeling of use of the device.

Further, a third embodiment will be described with reference to FIG.

The difference from the second embodiment is that, as shown in the figure, a light detecting means 11 for outputting to the comparing means 7 is provided, and the output value of the first storing means 5 and the third storing means 4, The output value of the detection means 11 is compared, and the output of the comparison means 7 is displayed on the display means 8.

Next, the operation of the above configuration will be described.
Except for the light detecting means 11, the second embodiment is the same as the second embodiment, and the description is omitted.

The light detecting means 11 detects the amount of sunlight in the vehicle, and outputs the output of the light quantity to the comparing means 7 at all times. The comparison means 7 receiving this output compares the outputs from the first storage means 5 and the third storage means 4 as in the second embodiment. An output signal output to the display means 8 when the output signal is larger than the output of the third storage means 4
When the amount of sunlight is large, the display is brightened, and when the amount is small, the output is darkened.

[0031] This makes it possible to provide a display that is easier to see regardless of the state of sunlight in the vehicle.

[0032]

As is apparent from the above description, the present invention
According to the d A cleaner, a predetermined meter according to the first timer
Dirt detected by the dirt detection means at predetermined time intervals within the hour
First storage means for accumulating the degrees and storing the accumulation results
And extending the interval stored in the first storage means.
The number of times of writing to the first storage means
The first storage means is not excessively burdened.

A second timer for measuring time is provided.
The fourth storage means for storing the time measured by the second timer is provided.
The time measured by the first timer is stored in the fourth storage means.
By determining based on the stored value, the time period of writing to the first storage means can be adjusted according to the past use state and the number of times of writing can be reduced. It is possible to perform an operation that matches the feeling.

Further, an optical detection for detecting the amount of ambient sunlight
Output means and display means for displaying the time to replace the filter.
The display means according to the output of the light detection means.
Since the brightness of the display is changed , the display can be displayed more easily regardless of the state of sunlight.

[Brief description of the drawings]

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

FIG. 2 is a circuit block diagram of a vehicle-mounted air cleaner according to the second embodiment.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dirt detection means 2 1st timer (timer) 3 2nd storage means 4 3rd storage means 5 1st storage means 6 Control means 7 Comparison means 8 Display means

Claims (3)

(57) [Claims] A dirt detection means for detecting as claimed in claim 1] dirt, a first timer for performing time counting for a predetermined by the first timer
Detected by the dirt detecting means at predetermined time intervals within the clocking time.
The first record that accumulates the degree of contamination that has occurred and stores the accumulation result
Storage means for extending the interval stored in the first storage means.
Place and d A cleaner, which was set to go. A second timer for performing 2. A time counting, the first
Fourth storage means for storing the time measured by the two timers is provided,
The time measured by the first timer is stored in the fourth storage means.
D A cleaner according to claim 1, wherein determining the stored value. 3. A light detecting means for detecting the amount of ambient sunlight.
And display means for displaying the time for replacing the filter,
According to the output of the light detection means, the display of the display means
D A cleaner according to claim 1 or 2, wherein was set to change the brightness.