JPH0362465B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air cleaner having a function of detecting dirt in indoor air using a gas sensor and automatically operating the air cleaner.

Conventional technology Conventionally, air purifiers equipped with a gas sensor and equipped with an automatic operation function have been known, but these operate at a predetermined air volume based on the output of the gas sensor. Operation continues as long as the engine is running.

Problems to be Solved by the Invention In such conventional air purifiers with an automatic operation function, even if the air purifier removes the cigarette smoke and its odor, the air purifier that generates it at the same time If various gas components that cannot be removed by the sensor remain in the room, the gas sensor will continue to react and output an output signal. For this reason, there was a problem in that operation continued for a long time until these components were diffused and the gas sensor output fell below a set level.

The present invention solves these problems and aims to provide a highly economical and practical air cleaner.

Means for Solving the Problems In order to solve the above problems, the present invention includes a gas sensor and a control circuit that uses the output of the gas sensor to automatically operate an operation pattern based on a combination of a plurality of air volume settings. Appropriate control is carried out depending on when contamination is progressing and when it is decreasing.

Effects The present invention has the above-described configuration, so that each time the air pollution progresses and the concentration of smoke, odor, or gas in the room rises and exceeds a plurality of set levels determined by adding a predetermined value to a set reference value, The operation is performed using a predetermined air volume operation pattern according to the setting level, and when the degree of indoor air pollution is decreasing, the operation pattern continues even if the setting level is exceeded, except when the highest setting level is exceeded. By continuing the previously determined operation pattern without changing the air purifier, the operation of the air purifier can be stopped in a relatively short time.

Embodiment Hereinafter, an embodiment of the air cleaner of the present invention will be described with reference to the drawings. Although FIG. 1 is an explanation of the operation control that is a feature of the present invention, first, the basic configuration of the air cleaner will be explained with reference to FIGS. 2, 3, and 4. Main body 1 has electric blower 2
The air sucked in from the front intake port 3 passes through a pre-filter 4, is ionized by the counter electrode 5 and the discharge wire 6, and after dust is adsorbed by the filter 7, is discharged from the exhaust port 8. . A remote control case 9 detachably attached to the upper part of the main body 1 is provided with an operating switch 10 and a display section 11, and also has a built-in gas sensor 12 for detecting the degree of contamination of indoor air. And operation switch 10
When the operation is set to automatic mode, the output of the gas sensor 12 is input to the control circuit 13, which is then input to the control circuit 1 connected to the power supply 14 and the operation circuit 15.
6 and controls the electric blower 2 so as to obtain the air volume determined according to the output level thereof, and also controls the power supply 14 that supplies voltage between the counter electrode 5 and the discharge line 6 and the display circuit 17. Note that 18 is a power cord.

Next, the control circuit 16 will be explained based on FIG. FIG. 1 is an explanatory diagram of the air volume operation pattern according to the output of the gas sensor 12.
is the gas sensor output signal, 21 to 23 are the air volume operation patterns according to each setting level 1 to 3, and 24
is an actual driving pattern obtained by combining the driving patterns 21 to 23 according to the gas sensor output signal 20. Setting levels 1 to 3 are predetermined by adding a predetermined value to a preset reference level. When the output 20 of the gas sensor 12 begins to rise above the standard level due to cigarette smoke, etc. and reaches the set level 1, the electric blower 2
Operation starts with an operation pattern 21 in which the air volume is 2 for a time t ₁ , then the air volume is 1 for a time t ₂ , and then stopped. When the output 20 further increases and reaches the set level 2, at this point, the operation pattern 21 that has been operating up to now is stopped and the air volume is 3 for a time t ₃ , the air volume is 2 for a time t ₄ , and a new operation is performed for a time t. Only ₅ air volume 1
Driving begins with driving pattern 22. When the output 20 further increases and reaches the highest set level 3, operation starts at the maximum set air volume 3, and the time t ₆ until the sensor output level falls below the set level 3.
This becomes the driving pattern 23 in which the driving is continued continuously. This operation purifies the air, and when the sensor output 20 exceeds the set level 3 in a downward direction, the operation starts again in the driving pattern 22 at the set level 3. Even if the sensor output 20 further decreases and exceeds the set level 2, the driving pattern does not change and the previous driving pattern 22 continues. In other words, when the gas sensor output 20 is in the direction of increasing contamination, the operation pattern switches to a new one each time it rises, but when it exceeds the maximum level, the maximum setting continues as long as the level exceeds this level. Perform continuous operation at the air volume. When the level falls below this maximum level, a new driving pattern is entered again.
Even if the sensor output exceeds a set level other than the highest set level in a downward direction, the system is controlled so as not to enter a new driving pattern. Therefore, in the case of Fig. 1, the actual operation pattern 24
works like this. An example has been described above assuming that there are three setting levels and three air volumes, but it is clear that these are not limited to these numbers and can be controlled by setting a larger or smaller number. .

In the case of FIG. 1, the operation pattern 22 starts when the set level 3 is exceeded in a downward direction, but this operation pattern 22 is predetermined for a certain period of time necessary for air purification (for example, 40
(or 50 minutes), so operation is automatically stopped after that certain period of time has passed. Also, the highest output 20 of the gas sensor 12 is the setting level 1.
When the maximum output 20 exceeds the set level 2 and does not reach the set level 2, the operation is performed for the time specified by the operating pattern 21.Similarly, when the maximum output 20 exceeds the set level 2 and does not reach the set level 3, the maximum output 20 exceeds the set level 2 and does not reach the set level 3. It will run for a certain amount of time and then be stopped.

Effects of the Invention As described above, according to the present invention, when the output level of the gas sensor increases, a new operation pattern is entered, but when it exceeds its peak and begins to decrease, the previously determined operation pattern is changed. If the sensor output level is below the maximum setting level after the peak has been exceeded by continuing to
Even if it stays at that level for a long time, automatic operation will stop after a predetermined period of time, which is economical.
Moreover, since the operation is limited to the operation pattern at the highest setting level, it is possible to provide an air purifier that can operate quietly.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the operation control of an air purifier in one embodiment of the present invention, Fig. 2 is an external perspective view of the air purifier, Fig. 3 is a circuit block diagram of the same, and Fig. 4 is a side sectional view of the same. It is. 12... Gas sensor, 16... Control circuit, 2
0...Gas sensor output signal.

Claims (1)

[Claims] 1 It has a gas sensor that detects the degree of indoor air pollution, and a control circuit that uses the output of the gas sensor to automatically operate an operation pattern based on a combination of multiple air volume settings. It has multiple setting levels that are determined by adding the values of However, when the degree of air pollution is decreasing, the operation pattern is not changed even if the set level is exceeded, and the previously determined operating pattern is continued, except when the highest set level is exceeded. An air purifier that is controlled to stop operation.