JPH05103932A - On-vehicle air cleaner - Google Patents

Abstract

PURPOSE:To provide the on-vehicle air cleaner capable of accurately detecting a dirt condition of the filter irrespective of the brightness in the vehicle and carrying out the replacement display. CONSTITUTION:This cleaner is constituted of a dirt detection means 1 for detecting dirt in a vehicle, the 1st timer 2 for clocking the time, the 2nd storage means 3 for storing plural prescribed values, the 3rd storage means 4, a control means 6 for inputting and processing the output signals of the 2nd storage means 3, the dirt detection means 1 and the 1st timer 2, the 1st storage means 5 for storing the output of the control means 6, a comparison means 7 for comparing the output values of the 1st storage means 5 and the 3rd storage means 4, and a display means 8 for displaying by the output of the comparison means 7. Thereby, since the elapsed time from engine startup to being stored in the 1st storage means 5 is performed by the data (after 1min, 3min, 8min) stored in the 2nd storage means 3, the number of write by the 1st storage means 5 is decreased to secure the life of equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle air cleaner used in a vehicle.

[0002]

2. Description of the Related Art In recent years, interest in dirt inside a vehicle has increased, air cleaners have attracted attention, and those having an automatic operation function by various sensors have become mainstream. Many have a function of displaying a filter exchange sign.

[0003]

However, since such a conventional air cleaner is used in a vehicle, it is not known when the engine will stop, and when 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 shortened too much, the number of writing times of the storage means reaches the end of its life before the warranty period of the product.

That is, in such an on-vehicle air cleaner, the dirt of the filter cannot be seen, and 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. There was a drawback that

The present invention solves the above problems, and an object of the present invention is to provide an in-vehicle air cleaner that can be guaranteed as a product and can detect the dirt state of a filter with a clear display.

[0006]

In order to achieve the above-mentioned object, the first object of the present invention is to solve the problems by a dirt detecting means for detecting dirt in a vehicle, a timer for measuring time, and a plurality of predetermined values. A second storage means and a third storage means for storing the above, a control means for inputting and processing output signals of the second storage means, the dirt detection means and the timer, and a storage means for storing the output of the control means. 1 storage means and this first
It comprises a comparison means for comparing the output value of the storage means with the output value of the third storage means, and a display means for displaying by the output of the comparison means.

Further, the second means for solving the problems comprises a second timer for measuring the time and outputting it to the control means, and a fourth storage means for storing the output value of the control means.

Further, in the third means for solving the problems, a light detecting means for detecting the amount of sunlight in the vehicle and outputting it to the comparing means is provided.

[0009]

According to the present invention having the above-mentioned structure, the first solution means outputs the output of the dirt detection means to the first storage means through the control means based on the outputs of the first timer and the second storage means. By comparing the output value with the output value of the third storage means by the comparison means and displaying the comparison value on the display means, the number of outputs (writing) to the first storage means can be reduced and the filter The degree of dirt can be accurately detected and displayed.

In addition to the first timer and the second storage means, the second solution means provides the first output from the dirt detection means to the first means via the control means based on the four outputs of the second timer and the fourth storage means. By outputting to the storage means and displaying it in the same manner as the first solving means, it is possible to adjust the writing time period of the first storage means together with the past usage state and write with a smaller number of writing times.

Further, by the third solving means, the detection display of the degree of dirt of the filter can be displayed more easily regardless of the state of sunlight.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 inside the vehicle, a first timer 2 for timekeeping, and a second storing a plurality of predetermined values.
Storage means 3, third storage means 4, second storage means 3, dirt detection means 1, control means 6 for inputting and processing output signals of the first timer 2, first storage means for storing the output of this control means 6. 5, the output value of the first storage means 5 and the third storage means 4
Comparing means 7 for comparing with the output value of and display means 8 for displaying by the output of the comparing means 7.

Next, the operation of the above configuration will be described.
When the vehicle engine starts to rotate, the control means 6 outputs the time count data to the first timer 2, and the first timer 2 receiving this output starts the time count (for example, 1 minute). At the same time, the timer 2 outputs an output to the control means 6 every second predetermined time (for example, 10 seconds). The dirt detection means 1 always outputs an output to the control means 6. The control means 6 determines, by the output of the first timer 2 every 10 seconds, at which level of the plurality of predetermined values of the second storage means 3 the most dirty value in the 10 seconds is located. When the above operation is performed 6 times, the time measured 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 located at, and the first storage here. The means 5 outputs the total sum of the six level values so far. The comparison means 7 inputs the output of the first storage means 5 and the predetermined value of the third storage means 4 and compares them, and if the output of the control means 6 is large, outputs a display signal to the display means 8.

Since the engine has not been turned off in the above 1 minute, the control means 6 again controls the first timer 2
The timer signal is sent to the first timer 2, but this time the first timer 2 outputs a timer signal of, for example, 3 minutes. However, the second predetermined time (10 seconds) is not changed (may be changed). Then, the same operation as above is performed under this condition. After a further 3 minutes have passed, the interval stored in the first storage means 5 is extended, for example, 8 minutes and 12 minutes. If the engine is turned off during this period, the engine will restart from the first minute.

Continuing the above operation, when the output of the control means 6 becomes larger than the output of the third storage means 4, the comparison means 7 sends a display signal to the display means 8 and the display signal is displayed. Means 8 provide a display.

As described above, the number of times of writing in the first storage means 5 can be reduced, and the dirt detection means 1 can be used.
Since the degree of contamination of the filter can be detected and displayed according to the output of, the 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, the difference from the first embodiment is that a second timer that measures the operating time and outputs it to the control means 6 and a fourth timer that stores the output value of the control means 6 are stored.
The storage means 10 is provided. The other parts are the same.

The operation of the above configuration will be described. When the engine of the vehicle starts to rotate, the control means 6 outputs the measured time data to the first timer 2 and the second timer 9. The first timer 2 which has received the output starts the time counting (for example, 1 minute) and sends the output to the control means 6 every second predetermined time (for example, 10 seconds). Further, the second timer 9 starts timing with the output from the control means 6. Then, similarly to 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 determines the predetermined value of 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 within this one minute, the timing signal is sent to the first timer 2 again. At this time, the second predetermined time is not changed. (May).

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

That is, the second timer 9 starts timing by the output of the control means 6 when the engine of the vehicle is started, but keeps timing until the engine is turned off, and when the engine is turned off, the fourth storage means is started. 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 and finishes the time measurement, and outputs the measured time so far to the control means 6. Receiving this signal, the control means 6 outputs this data by averaging the output from the fourth storage means 10 and the output of the clocking time, and the fourth storage means 10 receiving the output stores the data. This data is the average of the time taken by the engine, and the next measured time (time until writing to the first storage means 5) is determined by the data of this average time. For example, if this data is for 15 minutes, it will be 1, 6, 13 minutes.

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

Thereafter, when 6 minutes have passed, the interval stored in the first storage means 5 is extended to 13 minutes next.
If the engine is turned off during this time, it will restart from the first minute.

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

As a result, the input of the output of the dirt detection means 1 to the first storage means 5, that is, the writing time period is adjusted according to the past usage state, and the number of times of writing is reduced to secure the life of the first storage means 5. , It is possible to perform an operation suitable for 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 and the light detecting means 11 are provided. The output values of and are compared, and the output of the comparison means 7 is used to display on the display means 8.

Next, the operation of the above configuration will be described.
It should be noted that, except for the light detection means 11, it is the same as that of the second embodiment, and the description thereof is omitted.

The light detecting means 11 detects the amount of sunlight in the vehicle, and the output of the amount of light is always sent to the comparing means 7. 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, but the output of the first storage means 5 is The output signal output to the display unit 8 when the output is larger than the output of the third storage unit 4 is output by the light detection unit 11,
When the amount of sunlight is large, the display is bright, and when it is small, the display is dark.

As a result, a display that is easier to see can be displayed regardless of the state of sunlight inside the vehicle.

[0030]

As is apparent from the above description, according to the on-vehicle air cleaner of the present invention, the output of the dirt detection means is controlled by the first storage means via the control means based on the outputs of the timer and the second storage means. The output value of the filter is compared with the output value of the third storage means, and the comparison value is displayed on the display means. The degree can be accurately detected and displayed.

Further, the control means is further provided with a second timer and a fourth storage means, and the output of the dirt detection means based on these four outputs of the first timer and the second storage means is controlled by the control means and the first storage means. By comparing with the output value of the third storage means and displaying the same via the above, the writing time period of the first storage means can be adjusted according to the past usage state, and the number of writing times can be reduced. It is possible to ensure the reliability of the device and perform an operation suitable for the feeling of use.

Further, by providing the comparing means with the light detecting means, it is possible to display the replacement display depending on the degree of contamination of the filter more easily regardless of the condition of the sunlight.

[Brief description of 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 an in-vehicle air cleaner according to the second embodiment.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contamination 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)

[Claims] 1. A dirt detecting means for detecting dirt inside a vehicle, a timer for measuring time, a second storing means and a third storing means for storing a plurality of predetermined values, the second storing means, and the third storing means. Control means for inputting and processing the output signals of the dirt detection means and the timer, first storage means for storing the output of the control means, output value of the first storage means and output value of the third storage means. An in-vehicle air cleaner having a comparison means for comparing the above and a display means for displaying by the output of the comparison means. 2. The on-vehicle air cleaner according to claim 1, further comprising a second timer for counting time and outputting it to the control means, and a fourth storage means for storing the output value of the control means. 3. The in-vehicle air cleaner according to claim 1, further comprising a light detecting means for detecting the amount of sunlight in the vehicle and outputting it to the comparing means.