JPS6344920A - Air cleaner - Google Patents

Abstract

PURPOSE:To operate automatically according to contamination to be removed by providing a plurality of sensors having different sensitivity for different contents of contaminated air. CONSTITUTION:A first sensor 22 and a second sensor 23 having different sensitivity for various different contents of contaminated air are installed on the main body of an air cleaner. A control circuit 27 of the air cleaner is connected with a motorized blower 29 and an arithmetic circuit 30. By turning the outputs of the first sensor 22 and the second sensor 23 into a signal representing the difference between two outputs in the arithmetic circuit 30, a proper sensor output to correspond to contamination to be removed by the air cleaner is generated. As the output is received by the control circuit and operated automatically, unnecessary electric power need not be wasted by the air cleaner.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air cleaner having a function of detecting air pollution using a sensor and automatically operating the air cleaner.

2. Description of the Related Art A conventional air purifier 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 the main body, inside which an electric blower 2 is connected. Dust in the air taken in by the electric blower 2 from the intake port 3 on the front surface of the main body 1 is removed when it passes through a pre-filter 4 and a main filter 6, and only purified air is discharged from the bleed port 6. Also, main body 1
An operating section 9 having an operating switch 7 and a display section 8 is removably provided on the upper part. 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 1 via a power cord 13.
4, 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, the above 3 cases when smoking indoors and operating an air purifier.

The output of the sensor 10 is shown in FIG. Assuming that the output when the air is in a clean state is ○, the output of the sensor 1o increases after smoking starts and during smoking. sensor 10
When the output reaches a certain value B, automatic operation C is started.

Since dirt such as carbon monoxide that cannot be removed by the filter 4.5 and dirt that can be removed are detected at the same time by the sensor 1o, a constant The operation is continued for a time T, and when the output of the sensor 10 becomes a stable value without fluctuation, the operation is stopped on the assumption that all removable dirt has been removed. Note that the output of the sensor 1o 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 of the sensor 1o was a truly stable value. Therefore, after removing removable dirt, the device is operated for a certain period of time T, resulting in increased 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 Problem In order 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.

Accordingly, 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.

6. Example An example of the air cleaner of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, 16 is a main body, and an intake port 17 is provided on the front surface of the main body. An exhaust port 18 and an operation section 19 are provided on the top surface of the main body 16.
has been established. This operation section 19 includes a setting switch 2.
o and an indicator light 21 are provided, and the operating section 19 is removably installed on the main body 16.

Similarly, on the top surface of the main body 16, there are a first sensor 22 and a second sensor 22.
A sensor 23 is provided. This first sensor 22
and 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 air -4≠17 and the exhaust port 18 in the main body 16. 26 indicates a power cord. A control circuit section 27 connected to a power source 26 via the power cord 26 is connected to an operating circuit 28 . This control circuit section 27 is connected to an electric blower 29 provided inside the main body 16 and an arithmetic circuit section 3°. 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 receives the output shown in FIG.
The sensor 23 generates the output shown in FIG. The arithmetic circuit section 30 calculates the difference between the respective outputs and outputs a signal after the arithmetic operation as shown in FIG. 3C to the control circuit section 27. When the signal after this calculation reaches the value of voN, 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 voFF, the electric blower 29 is stopped. Here, the first sensor 22 and the second sensor 23 have a sensitivity ratio of 3:4 for components that can be removed by the air purifier (for example, ammonia, etc.) and components that cannot be removed (for example, -carbon oxide, etc.). 1=4 is used. Also,
As shown in FIG. 3C, the signal from the arithmetic circuit unit 30 to the control circuit unit 27 shows a value of voFF when the indoor air is clean (F), and increases when the indoor air is clean (G). When the value of the signal becomes voN and automatic operation H is started, it decreases, and when the air cleaner reaches dirt/ε that cannot be removed (I), the value of the signal becomes V○, ·F. As described above, in this embodiment, the outputs from the first sensor 22 and the second sensor 23 have different sensitivities to various components of air pollution. By creating a signal based on the difference between the two, it is possible to obtain only the seven-point output for dirt that can be removed by the air cleaner, and accurate automatic operation can be performed.

Note that in this embodiment, each sensor output is sent to the arithmetic circuit section 30.
I subtracted it and got 7. 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 that outputs an output of

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 drawings]

FIG. 1 is a perspective view showing an embodiment of the air cleaner of the present invention;
Figure 2 is a block diagram of the same circuit, Figure 3a is an output waveform diagram of the first sensor, Figure 3 is an output waveform diagram of the second sensor, and Figure 3C is the deductive circuit section. Figure 4 is a perspective view of a conventional air purifier, Figure 6 is a cross-sectional view of the same, and Figure 6 is a diagram of the output waveform of the conventional air cleaner.
The figure is a block diagram of the same circuit, and Figure 7 is an output waveform diagram of the same sensor. 22...First sensor, 23...Second sensor
sensor, 27...control circuit section, 30...
...Arithmetic circuit section. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure 5

Claims (1)

[Claims] It is equipped with a plurality of sensors that detect the degree of air pollution, an arithmetic circuit section that computes the output of each of the sensors, and a control circuit section that automatically operates upon receiving signals from the arithmetic circuit section. Air purifiers with different sensitivities to various components of dirt.