JPH0520127B2 - - 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 air pollution using a sensor and automatically operating the air cleaner.

BACKGROUND ART A conventional air cleaner equipped with a sensor and having an automatic operation function will be described below with reference to FIGS. 4 to 7.

In the figure, 1 is a main body, and an electric blower 2 is installed inside this main body. This electric blower 2 causes the main body 1
Dust in the air taken in through the intake port 3 on the front side of the air cleaner is removed when it passes through a pre-filter 4 and a main filter 5, and only purified air is discharged from the exhaust port 6. Further, an operating section 9 having an operating switch 7 and a display section 8 is removably provided on the upper part of the main body 1. Similarly, one sensor 10 is provided at the top of the main body 1 to detect the degree of pollution of the indoor air. When the automatic operation mode is set by the operation section 9, the output of the sensor 10 is input to the control circuit section 12 via the detection circuit 11 in the main body 1. This control circuit section 12 is connected to a power source 14 via a power cord 13 and controls the electric blower 2 and display circuit 15 . Then, automatic operation is performed in which the sensor 10 starts operating when the indoor air is contaminated and stops operating when the indoor air is purified. Since air pollution is a mixture of various gas components, a single sensor with multiple sensing capabilities is used to sense various components of dirt. Next, FIG. 7 shows the output of the sensor 10 when smoking indoors and operating the air purifier.
If the output when the air is clean is 0, then
After starting smoking, the output of the sensor 10 increases during smoking A. When the output of the sensor 10 reaches a certain value B, automatic operation C is started. Since dirt such as carbon monoxide that is not removed by the filters 4 and 5 and dirt that can be removed are simultaneously detected by the sensor 10, a constant The operation is continued for a time T, and when the output of the sensor 10 reaches a stable value D that does not fluctuate, it is assumed that all removable dirt has been removed, and the operation is stopped. Note that the output of the sensor 10 for dirt removed by automatic operation is E, and the output of the sensor 10 for dirt that is not removed is D.

Problems to be Solved by the Invention However, in the past, automatic operation had to be continued for a certain period of time T in order to confirm that the output value D of the sensor 10 was a truly stable value. Therefore, after the removable dirt has been removed, the apparatus is operated for a certain period of time T, resulting in an increase in power consumption.

SUMMARY OF THE INVENTION In order to solve these problems, it is an object of the present invention to provide an air cleaner that automatically operates accurately on removable dirt.

Means for Solving the Problems To achieve this objective, the air purifier of the present invention uses a plurality of sensors having different sensitivities to various components of air pollution, and calculates the outputs from these sensors. The vehicle is configured to include an arithmetic circuit section that performs automatic operation, and a control circuit section that receives an output from the arithmetic circuit section and performs automatic operation.

Effect: Therefore, different outputs for various components of air pollution are input from each sensor to the arithmetic circuit section. The input outputs from each sensor are calculated by the arithmetic circuit section, and only signals for dirt that can be removed by the air cleaner are transmitted to the control circuit section.
Automatic operation is performed in response to this transmitted signal.

Embodiment An embodiment of the air cleaner of the present invention will be described below with reference to FIGS. 1 to 3.

16 in the figure is the main body, and there is an intake port 1 on the front side.
7 is provided. An exhaust port 18 is provided on the top surface of the main body 16.
An operating section 19 is provided. The operating section 19 is provided with a setting switch 20 and an indicator light 21, and the operating section 19 is detachably installed on the main body 16. Similarly, a first sensor 22 and a second sensor 23 are provided on the upper surface of the main body 16. The first sensor 22 and the second sensor 23 have different sensitivities to various components of air pollution. Further, a filter 24 is provided in the ventilation flow path that communicates the intake port 17 and the exhaust port 18 in the main body 16. 25 indicates a power cord.
A control circuit section 27 connected to a power source 26 via the power cord 25 is connected to an operating circuit 28 . This control circuit section 27 includes an electric blower 29 provided inside the main body 16 and an arithmetic circuit section 3.
Connected to 0. The arithmetic circuit section 30 is also connected to the first sensor 22 and the second sensor 23.

In the air purifier configured in this way, when the indoor air becomes dirty, the first sensor 22 detects the
The second sensor 23 generates the output shown in FIG. 3b. The arithmetic circuit unit 30 calculates the difference between the respective outputs and outputs the calculated signal as shown in FIG. 3c to the control circuit unit 27. When the signal after this calculation reaches the value of v _ON , the control circuit section 27 drives the electric blower 29, and automatic operation is started. Then, when the signal after the calculation decreases and the value reaches v _OFF , the electric blower 29 is stopped. Here, the first
The sensor 22 and the second sensor 23 detect components that can be removed by the air purifier (for example, ammonia, etc.) and components that cannot be removed (for example, carbon monoxide, etc.).
The ratios of sensitivity to 3:4 and 1:4 were used, respectively. Further, as shown in FIG. 3c, the signal from the arithmetic circuit section 30 to the control circuit section 27 shows the value of v _OFF when the indoor air is clean, and increases when the indoor air is clean. . When the value of the signal becomes v _ON and automatic operation H is started, it decreases, and when the only dirt that cannot be removed by the air purifier is I, the value of the signal becomes v _OFF .

In this way, in this embodiment, the outputs from the first sensor 22 and the second sensor 23, which have different sensitivities to various components of air pollution, are calculated by the arithmetic circuit section 30. By setting a clear signal, only the sensor output for dirt that can be removed by the air purifier can be obtained, and accurate automatic operation can be performed.

In this embodiment, each sensor output is subtracted by the arithmetic circuit section 30. However, the air purifier has a sensor that outputs a positive output for dirt that can be removed and a negative output for dirt that cannot be removed, and a sensor that outputs a positive output for dirt that can be removed and dirt that cannot be removed. When a sensor is used, the outputs of each sensor are added by the arithmetic circuit section 30, thereby making it possible to cancel out the output signals for dirt that cannot be removed.

Effects of the Invention As described above, in the present invention, each output from a plurality of sensors having different sensitivities to various components of air pollution is calculated by a calculation circuit unit, and the control circuit unit receives the calculated outputs. By configuring the air purifier to operate automatically, the outputs of each sensor for dirt that cannot be removed by the air purifier can be offset. Therefore, only the sensor outputs corresponding to the dirt that can be removed by the air cleaner can be input to the control circuit section, and automatic operation can be performed appropriately depending on the dirt that can be removed, so that unnecessary power is not consumed. In this manner, the present invention provides excellent performance.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the air purifier of the present invention, Figure 2 is a block diagram of the same circuit, and Figure 3 a.
is the output waveform diagram of the first sensor, Figure 3b is the output waveform diagram of the second sensor, Figure 3c is the output waveform diagram of the arithmetic circuit, and Figure 4 is the output waveform diagram of the conventional air purifier. 5 is a sectional view, FIG. 6 is a block diagram of the circuit, and FIG. 7 is an output waveform diagram of the sensor. 22...First sensor, 23...Second sensor, 27...Control circuit section, 30...Arithmetic circuit section.

Claims (1)

[Claims] 1 Equipped with a plurality of sensors that detect the degree of air pollution, an arithmetic circuit unit that calculates the output of each of the sensors, and a control circuit unit that automatically operates upon receiving signals from the arithmetic circuit unit, so that each of the sensors detects air pollution. Air purifiers with different sensitivities to various components of dirt.