JPH11319451A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To comply with the request of various users without need for the detectors, indicators or operation control parts more than enough. SOLUTION: As for the air cleaner, the contamination detection signal from a contamination detector 20 is supplied to a signal judging part 9 to judge whether the signal is larger than a specified value or not, and the judgement result signal is outputted. The contamination detection signal is also supplied to a smoke density detecting part 10 and a dust concn. detecting part 11, and a switching signal from a switching part 12 driven by the judgement result signal is supplied to the smoke density detecting part 10 and dust concn. detecting part 11 to drive the one between both.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier, and more particularly, to an air purifier for purifying air by sucking air into an air purifier main body and discharging purified air from the air purifier main body. About.

[0002]

2. Description of the Related Art Conventionally, there has been provided an air purifier which purifies air by inhaling air and blowing out clean air. Among such air purifiers, as a high-performance one, it detects the dirt of the air to be sucked in, displays the detected dirt of the air, or controls the operation according to the detected dirt of the air. What has been proposed.

[0003] If this high-performance air purifier is employed, not only can the inhaled air be purified, but also the display of the dirt on the inhaled air or the operation of the air purifier can be controlled according to the dirt on the inhaled air. can do.

[0004]

[0005] However, the dirt of the air includes tobacco smoke and dust (mainly house dust).
And so on. And it is mainly smokers who require the former to remove air stains, while it is mainly allergic patients who require the latter to remove air stains.

[0005] Smokers and allergic patients are generally not allowed to coexist in consideration of the fact that allergic symptoms are exacerbated by cigarette smoke. Also, CO
₂ and NOx (the former is a gas emitted by humans and its concentration is high in a closed room, whereas the latter is a representative substance of air pollution, which enters the room from the outside and is closed (In general, the concentration does not increase in an indoor room).

[0006] Therefore, as for the above-mentioned high-performance air purifier, it is not known whether a smoker purchases and uses it or an allergic patient purchases and uses it. , A detector for detecting air contamination by dust is provided, and an indicator for displaying each detection result is provided, or an operation control unit for controlling the operation of the air purifier based on each detection result is provided. Is required.

However, as described above, the user
Since only one of the detectors, the corresponding display, or the operation control unit is required, and the other detector, the corresponding display, or the operation control unit is not required at all, the detector is useless as a result, An air purifier provided with a display or an operation control unit would be purchased. Also, when the air purifier is provided with a plurality of sensors for detecting air contamination,
Since there is a practical upper limit to the number of indicators (eg, LEDs) for displaying dirt, the display resolution of the degree of dirt for each type of air dirt is reduced. Similarly, the fineness of the operation control cannot be too fine. Furthermore, if the display of air contamination is to be performed by numerical values, a display is provided for each type of air contamination, which not only complicates the configuration but also increases the cost. As a result, there arises a problem that the fineness of display and operation control according to the desired type of air contamination is impaired with consideration of the type of air contamination that is not particularly annoying to the user. .

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can cope with various user requests. It aims to provide an air purifier that is not required.

[0009]

According to a first aspect of the present invention, there is provided an air purifier comprising: a dirt detecting means for detecting dirt of a plurality of types of intake air; and an intake air responding to a dirt detection signal output from the dirt detecting means. And a switching means for switching at least the display of the dirt by the display means according to the type of dirt.

[0010] The air purifier according to claim 2 further includes operation control means for controlling the operation of the air purifier in response to a dirt detection signal output from the dirt detection means. That also switches the operation of the air purifier according to the type of dirt. The air purifier according to claim 3 further includes an operation mode selection means for selecting an operation mode of the air purifier, and employs, as the switching means, one that operates according to the operation mode selected by the operation mode selection means. Things.

According to a fourth aspect of the present invention, as the air purifier, one that operates according to a dirt detection signal is used as the switching means. According to a fifth aspect of the present invention, as the air purifier, one that is operated by a manual operation is adopted as the switching unit. The air purifier according to claim 6 employs, as the dirt detecting means, one that detects at least smoke density and dust density as dirt of the intake air.

According to a seventh aspect of the present invention, as the air purifier, a device including at least a smoke density detecting section and a dust density detecting section is adopted as the dirt detecting means. The air purifier according to claim 8 employs a common optical chamber as the smoke density detector and the dust density detector. The air purifier according to claim 9, further comprising a remote controller for supplying an operation control signal from a position distant from the air purifier main body, wherein at least one of the switching unit and the dirt detection unit is provided in the remote controller. is there.

[0013]

According to the air purifier of the present invention, when the air is sucked into the air purifier main body to purify the air and the purified air is discharged from the air purifier main body, a plurality of types of air are detected by the dirt detecting means. In response to a dirt detection signal output from the dirt detecting means, the display means displays the dirt of the intake air in response to the dirt detection signal output from the dirt detecting means. Can be switched according to the type of dirt.

Therefore, it is possible to detect and display a desired type of dirt only by providing a smaller number of display means than the types of dirt that can be detected, and to cope with the needs of various users. It is possible to provide an air purifier that can maintain high display resolution in accordance with the type of dirt. The air purifier according to claim 2, further comprising operation control means for controlling the operation of the air purifier in response to a dirt detection signal output from the dirt detection means, wherein the switching means comprises air provided by an operation control means. Since a process for switching the operation of the purifier in accordance with the type of dirt is also employed, in addition to the function of claim 1, it is only necessary to provide dirt detection means of a type smaller than the types of dirt that can be detected. The air purifier can also control the operation of the air purifier, and thus can cope with the demands of various users, and does not require an extra detector, display, or operation control unit. Can be provided.

According to the air purifier of the third aspect, the air purifier further includes an operation mode selection means for selecting an operation mode of the air purifier, and operates as the switching means in accordance with the operation mode selected by the operation mode selection means. Therefore, in addition to the operation of claim 1 or claim 2, the switching means can be automatically operated only by selecting the operation mode, which complicates the operation. Can be prevented from occurring.

According to the air purifier of the present invention, since the switching means which operates in accordance with the dirt detection signal is employed, the air purifier can be used in addition to the effects of the first and second aspects. , The switching means can be operated automatically, and the operation can be simplified. In the air purifier of claim 5, as the switching means,
Since a device that is operated by a manual operation is employed, the switching means can be operated in accordance with the user's request in addition to the effects of the first or second aspect.

According to the air purifier of the present invention, as the dirt detecting means, one that detects at least smoke density and dust density as dirt of the intake air is adopted. In addition to the above-mentioned effects, at least the smoke density and the dust density can be detected. According to the air purifier of the present invention, the dirt detecting means includes at least a smoke density detecting section and a dust density detecting section. In addition, at least the smoke density and the dust density can be detected.

According to the air purifier of the present invention, since the smoke density detector and the dust density detector share an optical chamber, the smoke density detector and the dust density detector are added. Even when the unit and the dust concentration detection unit are provided, the configuration can be simplified and the cost can be reduced as compared with the case where these units are provided completely separately. Claim 9
The air purifier further includes a remote controller for supplying an operation control signal from a position distant from the air purifier main body, and at least one of the switching unit and the dirt detection unit is provided in the remote controller. In addition to the effects of any one of claims 1 to 8, it is possible to detect contamination of the air near the user and / or perform the switching operation even at a position distant from the air cleaner main body.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an air purifier according to the present invention will be described in detail with reference to the accompanying drawings. FIG.
FIG. 2 is a front view showing an embodiment of the air purifier of the present invention, FIG. 2 is a cross-sectional view, FIG. 3 is a plan view showing an internal mechanism of an example of a dirt detection unit, and FIG. FIG. 5
FIG. 3 is a block diagram showing an electrical configuration of a main part.

This air purifier has an air suction port 1a at the center of the rear face, and a casing 1 having a clean air outlet 1b over substantially the entire front face, and a rear face of the casing 1 covering the air suction port 1a. (For example, a filter that removes only large-diameter dust particles), a fan motor 3 provided inside a casing 1 in front of an air suction port 1a via a support member (not shown), and a fan Motor 3 and air inlet 1a
And the fan motor 3
Is provided so as to surround the fan 4 rotated by the fan 4 and the fan motor 3, and controls the air flow so that the air flow generated by the fan 4 has a substantially uniform flow velocity over the entire range of the clean air outlet 1b. An air flow control member 5, a main filter (a filter having a high air purification capability) 6 provided between the clean air outlet 1b and the air flow control member 5, and a first vertical flap provided on the clean air outlet 1b 7a and a horizontal flap 7b. In addition,
Reference numeral 1c denotes a display / operation unit for performing various displays and performing various operations.

Further, a dirt detector 20 is provided at a predetermined position in the air flow path (for example, a predetermined position of the air suction port 1a). The dirt detector 20 includes a substrate 21 on which a light emitting unit 21a including a light emitting diode and a light receiving unit 21b including a photodiode are mounted, and a dark box (case) 22. Here, as the substrate 21, for example, a printed wiring board made of glass epoxy can be exemplified, and as the dark box 22, for example, an acrylonitrile butadiene styrene copolymer (hereinafter, A)
(Abbreviated as BS).

The dark box 22 is a rectangular parallelepiped box as a whole.
By forming an upwardly extending wall member inside it,
A light emitting unit housing space 22a and a light receiving unit housing space 22b are formed, and lens systems 22c and 22d are provided in the light emitting unit housing space 22a and the light receiving unit housing space 22b, respectively. The two lens systems 22c and 22d are arranged so that the optical axes of the two lens systems 22c and 22d form a predetermined angle with each other. Further, a hole is formed on the optical axis of the lens system 22c and inside the light-emitting unit housing space 22a to allow the light-emitting unit 21a to enter. Note that the lens system 2
2c can be omitted.

The light emitted from the light emitting unit 21a through the lens system 22c is prevented from being directly guided to the light receiving unit 21b through the lens system 22d in the intermediate portion between the light emitting unit housing space 22a and the light receiving unit housing space 22b. Light shielding member 2
2e is provided. In addition, light that may act as noise light is transmitted through the lens system 22d to the light receiving unit 21b.
A noise light blocking member 22f for preventing the light from being guided to the light emitting portion is provided at a position substantially opposite to the light emitting portion housing space 22a, the light receiving portion housing space 22b, and the light blocking member 22e. A plurality of noise light shielding members 22f are provided, and the noise light shielding members 22f adjacent to each other constitute a noise light attenuation chamber. The light introduced into the noise light attenuating chamber is reflected a plurality of times on the inner wall surface of the chamber where the absorbance is high, so that its intensity is sufficiently attenuated. Further, the noise light shielding member 22 to which the direct light from the light emitting section 21a is irradiated is provided.
f, a hole 22j for directly transmitting light is formed at a predetermined position, and the noise light shielding member 22f
And a plate member defining the light receiving unit housing space 22b, and the dark box 2
The second outer wall member constitutes the light trap 22k. Further, an opening 22i for introducing a fluid is provided at a predetermined position near the tip of the light shielding member 22e. Of course, an opening (not shown) for introducing a fluid is also provided at a corresponding position of the substrate 21.

Therefore, an output signal from the light receiving section 21b can be output as a stain detection signal. Further, a stain detection signal from the stain detector 20 is supplied to the signal determination unit 9 to determine whether or not the signal is greater than a predetermined reference value, and a determination result signal is output. Then, a dirt detection signal is also supplied to the smoke density detection unit 10 and the dust density detection unit 11, and a switching signal from the switching unit 12 driven by the determination result signal is sent to the smoke density detection unit 10 and the dust density detection unit 11. The supply drives one of the two. In addition, an output signal from the smoke density detecting unit 10 and an output signal from the dust density detecting unit 11 are supplied to the dirt display 13, and an operation control unit 14 for controlling the fan motor 3 and the like of the air purifier.
To supply.

The operation of the air purifier having the above configuration is as follows. When the fan motor 3 of the air purifier is operated, the indoor air is sucked into the casing 1 by the fan 4 through the pre-filter 2 and the air suction port 1a. At this time, the indoor air is also guided to the dirt detector 20, and the dirt of the air that has passed through the pre-filter 2 can be detected. Specifically, for example, the concentration (mg / m ³ ) of airborne particles in the air is detected.

Here, as shown in FIG. 6, the unit for expressing the concentration of smoke and dust can be shared as mg / m ³ , and the concentration of suspended particulates of dust is generally smaller than that of smoke. For example, by determining the magnitude of the reference value corresponding to 0.1 mg / m ³ and the stain detection signal, the stain detection signal can be adopted as the smoke density detection signal or the dust density detection signal. Specifically, the signal determination unit 9 determines the magnitude of the reference value and the dirt detection signal to obtain a determination result signal, and supplies the determination result signal to the switching unit 12 to obtain a switching signal. The switching signal is sent to the smoke density detector 10 and the dust density detector 1 to which the density detection signal is supplied.
1 to drive one of the two to obtain a corresponding density detection signal. The density detection signal is supplied to a dirt indicator 13 to display the degree of dirt in the air due to smoke or dust, and is also supplied to an operation control unit 14 to control the fan motor 3 and the like of the air purifier.

The air introduced into the casing 1 is guided to the main filter 6 after the air flow is controlled by the air flow control member 5 to remove suspended particulates, and is provided at the clean air outlet 1b. The air is blown as clean air in a direction defined by one vertical flap 7a and horizontal flap 7b. As is clear from the above, the dirt detector 20
Is provided, it is possible to detect both the smoke density and the dust density.
0, any one of the dust concentration detectors 11 can be selected and displayed by one dirt indicator 13, and / or the fan motor 3 of the air purifier can be controlled by one operation controller 14. As a result, an unnecessary detector, display, or operation control unit is not required, and various user requests can be dealt with.

FIG. 7 is a front view showing an example of the display / operation section 1c. The display / operation unit 1 c has switching state display LEDs 12 a and 12 b for displaying a switching state, and a numerical display 13 for numerically displaying air dirt as an example of the dirt display 13. In the case of adopting this configuration, either the detection of the smoke density or the detection of the dust (house dust) density switched by the switching unit 12 can be displayed by the switching state display LED. Can be displayed by the numerical display 13 as the degree of contamination of the air.

FIG. 8 is a front view showing a display / operation unit 1c corresponding to an embodiment in which the switching unit 12 is manually operated. The display / operation unit 1c includes a switching operation button 12 as an example of a switching unit 12, and switching state display LEDs 12a and 12b for displaying a switching state.
And a display LED 13 as an example of the dirt indicator 13, which displays air dirt in five levels.

When this configuration is employed, the user can operate the switching operation button 12 to select either smoke (tobacco smoke) density detection or dust (house dust) density detection. The degree of contamination of the air based on the selected density can be displayed by the number of lighted display LEDs 13. FIG. 9 is a front view showing still another example of the display / operation unit 1c.

The display / operation unit 1c includes a display switching operation button 12g for manually switching the dirt display.
Operation switching operation button 12h for switching automatic operation by manual operation, display switching state display LEDs 12c and 12d for displaying a display switching state, and operation switching state display LED 1 for displaying an operation switching state.
2e and 12f.

Therefore, it is possible to manually switch between automatic operation based on the smoke (tobacco smoke) concentration and automatic operation based on the dust (house dust) concentration, and the smoke (tobacco smoke) concentration It is possible to manually switch between displaying the air stain based on the image and displaying the air stain based on the dust (house dust) concentration.
Specifically, for example, every time the switching operation button is operated, a display based on the smoke (tobacco smoke) density, or an automatic operation, a display based on the dust (house dust) density, or an automatic operation, a smoke (tobacco smoke) State transition is performed in the order of display based on the density and dust (house dust) density (for example, each is displayed alternately) or automatic operation (for example, automatic operation based on each alternate). However, the operation mode can be selected, and the display can be automatically switched according to the operation mode.

FIG. 10 is a flowchart for explaining an example of the processing of the air purifier. In step SP1, it is determined whether or not only display of air dirt based on smoke (tobacco smoke) density is selected, and only display of air dirt based on smoke (tobacco smoke) density is selected. Is determined, in step SP2, processing based on smoke (smoke from cigarettes) density (detection processing of air contamination, display processing based on the detection result, etc.) is performed. If it is determined in step SP1 that only the display of the air stain based on the smoke (smoke of cigarette) density is not selected, in step SP3, only the display of the air stain based on the dust (house dust) density is displayed. It is determined whether or not the display is selected, and if it is determined that only the display of the air stain based on the dust (house dust) density is selected, in step SP4, the processing based on the dust (house dust) density is performed. (Such as detection processing of air contamination and display processing based on the detection result). If it is determined in step SP3 that only the display of the air stain based on the dust (house dust) density is not selected, then in step SP5, the display is performed based on the smoke (tobacco smoke) density and the dust (house dust) density. Processing (such as air contamination detection processing and display processing based on the detection result) is performed.

When the processing in step SP2, the processing in step SP4, or the processing in step SP5 is performed, the determination in step SP1 is performed again. FIG. 11 is a diagram illustrating an example of the process of step SP2. In the process of step SP2, and is stain detection signal from the soil detector 20, air contamination degree 0.05 mg / m of less than ^3, 0.05~0.1mg / m ^3, 0.1~0.15m
^{g / m 3, 0.15~0.3mg / m} 3, 0.3~0.5
The lighting number of the display LED 13 is set to one of 0 to 5 according to each of the categories of mg / m ³ , 0.5 mg / m ³ or more.

FIG. 12 illustrates an example of the process of step SP4.
FIG. In the processing of step SP4,
The dirt detection signal from the detector 20 is used to
0.01mg / m^ThreeLess than 0.01 to 0.03 mg /
m^Three0.03 to 0.05 mg / m^Three, 0.05-0.1
mg / m^Three0.1-0.15 mg / m ^Three, 0.15mg
/ M^ThreeIn correspondence with the above divisions, display L according to each division
The lighting number of the ED 13 is set to one of 0 to 5.

FIG. 13 is a view for explaining an example of the processing of step SP5. In the process of step SP5, the dirt detection signals from the dirt detector 20 are alternately detected as smoke (cigarette smoke) density and dust (house dust) density, and the smoke (cigarette smoke) density is set to 0.05 mg. / M ³ , 0.05
0.1 to 0.3 mg / m ³ , 0.1 to 0.3 mg / m ³ , 0.3
Dust (house dust) corresponding to the category of mg / m ³ or more
Concentration less than 0.01 mg / m ³ , 0.01-0.05 m
g / m ³ , 0.05-0.1 mg / m ³ , 0.1 mg / m
^In correspondence with ^three or more sections, the lighting number of the display LEDs 13 is set to any one of 0 to 5 according to the combination of both sections.

Although FIGS. 11 to 13 show only display examples corresponding to the dirt detection signal from the dirt detector 20, the operation control can be similarly controlled corresponding to each section. it can. In the above embodiment, only one dirt detector 20 is provided to detect the smoke (tobacco smoke) concentration and the dust (house dust) concentration, but it is possible to detect other concentrations. In addition, a detector that detects smoke (tobacco smoke) concentration, and dust (house dust)
It is possible to provide a detector for detecting the concentration. However, also in this case, the number of indicators can be minimized or the number of operation control units can be minimized.

Further, in providing a detector for detecting the smoke (tobacco smoke) concentration and a detector for detecting the dust (house dust) concentration, both of the detectors detect light scattering in the dark box 22. Since the generated optical chamber can be shared, simplification of the configuration can be achieved by such sharing. Furthermore, in the above embodiment, the dirt detector 20, the indicator 13, and the like are provided on the casing 1 of the air purifier, but a remote controller (not shown) for controlling the operation from a position away from the air purifier. And a dirt detector, a display and the like may be provided on the remote controller. In this case, air contamination near the operator can be detected, and the operation of the air purifier can be controlled based on the detected air contamination.

FIG. 14 is a block diagram showing another electrical configuration. The dirt detection signals from the two dirt detectors 20 are
The output signals from the smoke density detector 10 and the dust density detector 11 are supplied to the dirt indicator 13 via the switching unit 12, respectively. To the operation control unit 14 for controlling the fan motor 3 and the like. Further, the switching instruction signal from the switching unit 12 is transmitted to the dirt indicator 13 and the operation control unit 14.
To achieve the optimal display resolution and the fineness of operation control.

Therefore, when this electrical configuration is adopted, one of the smoke density and the dust density is selected by the switching unit 12, and the optimum display resolution of the dirt display 13 and the operation control unit 14 are selected in accordance with the selection. , The fineness of the operation control can be realized. As a result, it is possible to consider the type of air contamination that is not bothersome to the user, and it is possible to prevent the inconvenience that the display resolution and the fineness of the operation control are impaired.

[0041]

According to the first aspect of the present invention, it is possible to detect and display a desired type of dirt only by providing a smaller number of display means than the types of dirt which can be detected. It is possible to provide an air purifier that can respond to the demands of the user and that can maintain a high display resolution in accordance with the type of dirt.

According to the second aspect of the present invention, in addition to the operation of the first aspect, the operation of the air purifier can be controlled only by providing dirt detecting means of a type smaller than the types of dirt that can be detected. As a result, it is possible to cope with the demands of various users and to provide an air purifier that does not require an extra detector, display, or operation control unit.

According to the third aspect of the invention, in addition to the effects of the first or second aspect, the switching means can be automatically operated only by selecting the operation mode, and the operation time is complicated. This has a specific effect that occurrence of inconvenience can be prevented. According to the fourth aspect of the invention, in addition to the effects of the first or second aspect, the switching means can be automatically operated in accordance with the contamination of the air, and a special effect of simplifying the operation can be obtained. .

According to the fifth aspect of the present invention, in addition to the effects of the first or second aspect, there is a special effect that the switching means can be operated according to a user's request.
According to the invention of claim 6, in addition to the effect of any one of claims 1 to 5, a unique effect that at least smoke density and dust density can be detected. The invention of claim 7 has a unique effect that at least the smoke density and the dust density can be detected in addition to the effect of any one of claims 1 to 5.

According to the eighth aspect of the present invention, in addition to the effect of the seventh aspect, even when the smoke density detecting section and the dust density detecting section are provided, the configuration is more compared with the case where these are provided separately. It has a unique effect that it can be simplified and cost reduction can be achieved. The invention of claim 9 is the invention of claim 1
In addition to the effect of any one of claims 8 to 10, there is a special effect that it is possible to detect dirt in the air near the user and / or to perform the switching operation even at a position distant from the air cleaner body. .

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the air purifier of the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a plan view illustrating an internal mechanism of an example of a dirt detection unit.

FIG. 4 is a schematic front view of an example of a dirt detection unit.

FIG. 5 is a block diagram showing an electrical configuration of a main part.

FIG. 6 is a diagram illustrating switching of a dirt detection signal according to the degree of dirt in air.

FIG. 7 is a front view illustrating an example of a display / operation unit.

FIG. 8 is a front view showing a display / operation unit corresponding to an embodiment in which a switching unit is manually operated.

FIG. 9 is a front view showing still another example of the display / operation unit.

FIG. 10 is a flowchart illustrating an example of a process of the air purifier.

FIG. 11 is a diagram illustrating an example of a process in step SP2 of the flowchart in FIG. 10;

FIG. 12 is a diagram illustrating an example of a process in step SP4 of the flowchart in FIG. 10;

FIG. 13 is a diagram illustrating an example of a process of step SP5 in the flowchart of FIG. 10;

FIG. 14 is a block diagram showing another electrical configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 12 Switching part 12h Operation switching operation button 20 Dirt detector

Claims (9)

[Claims] An air purifier for purifying air by sucking air into an air purifier body (1) and discharging purified air from the air purifier body (1). Dirt detection means (2
0) and display means (13) for displaying the dirt of the intake air in response to the dirt detection signal output from the dirt detection means (20).
An air purifier characterized by comprising: at least switching means (12) for switching display of dirt on the display means (13) according to the type of dirt. 2. An operation control means (14) for controlling the operation of the air purifier in response to a dirt detection signal output from the dirt detection means (20), wherein the switching means (12) 2. The air purifier according to claim 1, wherein a process of switching the operation of the air purifier by the control means in accordance with the type of dirt is also performed. 3. An operation mode selection means (12h) for selecting an operation mode of the air purifier, wherein the switching means (12) operates according to the operation mode selected by the operation mode selection means (12h). The air purifier according to claim 1 or 2, wherein the air purifier performs the operation. 4. The air purifier according to claim 1, wherein the switching means operates in response to a dirt detection signal. 5. The air purifier according to claim 1, wherein the switching means (12) is operated by a manual operation. 6. The air purifier according to claim 1, wherein the dirt detecting means (20) detects at least smoke density and dust density as dirt of the intake air. 7. The air purifier according to claim 1, wherein the dirt detecting means (20) includes at least a smoke density detecting section and a dust density detecting section. 8. The smoke density detection section and the dust density detection section,
The air purifier according to claim 7, wherein the air purifier shares the optical chamber. 9. A remote controller for supplying an operation control signal from a position distant from the air purifier body (1), wherein the switching means (12) and the dirt detecting means (20).
2. The remote controller according to claim 1, wherein at least one of them is provided on a remote controller.
An air purifier according to any one of claims 1 to 8.