JP3012235B1 - Air cleaner - Google Patents

Abstract

To provide an air purifier capable of efficiently purifying air even for different types of dust such as futon dust and cigarette smoke. SOLUTION: A determination means for comparing an average dust concentration value with a previously stored dust concentration determination reference value, and an average dust concentration value obtained by sampling and averaging the dust concentration values for a certain period of time and a plurality of stored dust concentrations in advance. The configuration includes first comparing means for comparing with a reference value and second comparing means for comparing a time when the dust concentration value continuously exceeds the dust concentration determination reference value with a predetermined time stored in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an air purifier for efficiently sucking and purifying cigarette smoke and house dust.

[0002]

2. Description of the Related Art A conventional air purifier of this type will be described with reference to FIGS. 1, 2 and 7. FIG. 1 is a housing of the air purifier, 2 is an inlet provided on the front surface of the housing 1, 3 is a housing 1
It is an air outlet provided on the upper surface of. 4 is an air guide,
Here, it is formed to protrude in an arch shape so as to take a posture falling down into the intake port 2 from between the intake port 2 and the outlet port 3. The air guiding portion 4 includes a fixed portion 5 integrally formed with the housing 1 and a movable movable portion 6 which can extend the upper end of the fixed portion 5 substantially when raised from the storage position shown in FIG.
And are formed separately. Reference numeral 8 denotes a blower including a motor 9 and a sirocco fan 10. The suction side communicates with the dust collecting section 7 and the exhaust side communicates with the outlet 3. Reference numeral 11 denotes a mesh filter for collecting relatively large cotton dust and the like.

[0003] Further, from the configuration diagram of FIG. 7, reference numeral 12 denotes an optical dust detector for detecting dust such as cigarette smoke and house dust, and 13 includes a sensor output measuring means 14, a comparing means 15, and a blower control means 16. Control unit.

Next, the operation of the above configuration will be described.
When the apparatus starts operation for purifying the indoor air, power is supplied to the motor 9, the sirocco fan 10 rotates, and air starts to flow from the suction port 2. The room air that flows in
The air that has been adsorbed and removed by the dust collecting section 7 and the dust or the like has been removed from the outlet 3 and is cleaned is sent out.

[0005] In addition, even if it says dust at a glance, the output value of the dust concentration of the optical dust detector 12 differs depending on the kind of dust generated. Therefore, in such a configuration,
FIG. 9 shows output values of the optical dust detector 12 when smoking a cigarette indoors. Cigarette smoke in the air does not diffuse uniformly, and the dust concentration tends to vary. Therefore, the output value rises while vibrating up and down greatly in the initial stage of rising, and eventually becomes saturated.

On the other hand, FIG. 10 shows output values of the optical dust detector 12 in the case of futon dust, which is house dust. Since the futon dust is uniformly diffused in the air, the dust concentration hardly varies, and therefore, as shown in the figure, the output value is lower than that of the cigarette and the vibration width is narrow. . The optical dust detector 12 has high sensitivity,
Since it reacts even to a small amount of dust, even when the indoor air is cleaned, as shown in FIG.
The output value of 2 generates noise that becomes a one-shot pulse.

The operation of the conventional control unit 13 for such an output value of the optical dust detector 12 is shown in a flowchart of FIG. According to the flowchart, in order to avoid a malfunction of the noise of the one-shot pulse, a sampling process of sampling and averaging the dust concentration value for a certain period of time is performed, and the sampled average dust concentration value is subjected to several dust concentration reference values (for example, “strong”). Level, “medium level”, “weak level”, etc.) to determine the air volume of the blower 8.

[0008]

However, in the above control, since the air volume of the blower is updated after the sampling process, when the output value rapidly rises while vibrating rapidly like cigarette smoke in FIG. If the response to the cigarette smoke is delayed, or if the dust concentration reference value is set low to accurately detect a low output value such as futon dust in FIG. For the output value that rises rapidly as described above, the instantaneous blower has the maximum air volume, increasing the discomfort of the user, and conversely, if the dust concentration reference value is increased, the futon dust with a low output value is reduced. There was a problem that it could not be detected.

Accordingly, the present invention has been made in view of such circumstances,
Even when the output value is low, such as futon dust, or when the output value vibrates, such as in cigarettes, the dust is reliably and quickly detected, and the user is discomforted by controlling the air volume of the blower. An object of the present invention is to provide an air purifier that efficiently purifies air without giving it.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a blower in a housing, a dust collector for adsorbing and removing dust and the like, an optical dust detector for detecting dust concentration,
In an air purifier including a control unit that controls the blower based on a dust concentration value detected by the optical dust detector, the control unit compares the dust concentration value with a previously stored dust concentration determination reference value. Determining means for determining, first comparing means for comparing the average dust concentration value obtained by sampling and averaging the dust concentration values for a certain period of time with a plurality of stored dust concentration reference values stored in advance, and wherein the dust concentration value is A second comparing means for comparing a time continuously exceeding the dust concentration determination reference value with a predetermined time stored in advance, and comparing and determining the dust concentration value with the determining means; Alternatively, the present invention relates to an air cleaner, wherein a blower is controlled based on a comparison result of the second comparing means.

When the dust concentration value continuously exceeds the dust concentration determination reference value for a predetermined time by the second comparing means, the control unit increases the air volume level of the blower in a stepwise manner. The present invention relates to an air purifier according to claim 1.

2. The air purifier according to claim 1, wherein the determination reference value is larger than a maximum value of a plurality of levels of dust concentration reference values stored in advance by the first comparison means. is there.

[0013]

According to the above configuration, for the case where the output value of the dust concentration rises while rapidly vibrating like smoke of tobacco, even if the sampling processing by the first comparing means is not completed, By the second comparing means, the air volume of the blower can be changed when the output value exceeds the dust concentration determination reference value for a predetermined time, and the operation corresponding to the dust concentration can be performed by gradually increasing the air volume of the blower. And the user will not feel uncomfortable. Further, since the plurality of dust concentration reference values of the first comparing means can be set low, it is possible to more reliably detect and remove even a small output value such as futon dust.
Further, malfunction due to noise of a one-shot pulse during cleaning can be reliably avoided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

1 is a housing of the air purifier, 2 is a housing 1
3 is an air outlet provided on the upper surface of the housing 1, 4 is an air guide, and the air inlet is provided between the air inlet 2 and the air outlet 3 so as to fall into the air inlet 2. Here, it is formed in an arch shape so as to take a posture. The air guiding portion 4 includes a fixed portion 5 integrally formed with the housing 1 and a movable movable portion 6 that can extend the upper end of the fixed portion 5 substantially when raised from the storage position in FIG. Are formed separately.

Reference numeral 7 denotes a dust collecting portion as a removing means for removing dust and the like, and here, an electric dust collecting type is adopted. Reference numeral 8 denotes a blower including a motor 9 and a sirocco fan 10. The suction side communicates with the dust collecting section 7 and the exhaust side communicates with the outlet 3. Reference numeral 11 denotes a mesh filter for collecting relatively large cotton dust and the like.

In FIG. 3, an optical dust detector 12 detects dust such as cigarettes and house dust. Reference numeral 13 denotes a control unit, which is a sensor output measuring unit 14 for measuring the dust concentration detected by the optical dust detector 12, and whether the dust concentration value measured by the sensor output measuring unit 14 is equal to or greater than the dust concentration determination reference value. A determination unit 17, a first comparison unit 18, a second comparison unit 19, and a blower control unit 16 are provided.

In this configuration, the dust concentration of the indoor air is detected by the optical dust detector 12, and the output is measured by the sensor output measuring means 14. After the determination unit 17 determines whether the dust concentration value measured by the sensor output measurement unit 14 is larger or smaller than the dust concentration determination reference value, the comparison result by the first comparison unit 18 or the second comparison unit 19 is obtained. , The air volume of the blower 8 is determined.

The number of rotations of the blower 8 is controlled by the blower control means 16, and the rotation causes room air to flow in from the suction port 2. Is sent out from the outlet 3 to clean the indoor air.

Here, the first comparing means 18 samples the dust concentration value measured by the sensor output measuring means 14 for a certain period of time and averages the averaged dust concentration value and a plurality of pre-stored dust concentration reference values. The values are sequentially compared. Further, the second comparing means 19 is configured to compare a time in which the dust concentration value measured by the sensor output measuring means 14 continuously exceeds the dust concentration determination reference value with a predetermined time stored in advance. I have.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. The dust concentration detected by the optical dust detector 12 is measured by the sensor output measuring unit 14 in the control unit 13 (Step 1), and the determining unit 1
7 is compared with the dust concentration determination reference value (step 2).

If the dust concentration value measured by the sensor output measuring means 14 is equal to or less than the dust concentration determination reference value, the first comparing means 18 samples the dust concentration value for a certain period of time and averages it ( Step 3) The average dust concentration value is sequentially compared with a plurality of dust concentration reference values stored in advance in the first comparing means 18 so that the air volume of the blower 8 is at a level corresponding to the dust concentration reference value. Is output to the blower control means 16 (steps 4, 5, 6). In this embodiment, the dust concentration reference value is set to “strong level”, “medium level”, “weak level”.
Although the three levels are set, finer control becomes possible as the number of levels of the dust concentration reference value increases.

On the other hand, when the dust concentration value is equal to or more than the dust concentration judgment reference value, the processing shifts to the processing by the second comparing means 19. The second comparing means 19 determines whether or not the time during which the dust concentration value exceeds the dust concentration determination reference value continues for a predetermined time or more (step 7). If the above condition is satisfied, the blower control means 16 sends the airflow level of the blower 8 Is output in such a way as to increase step by step. In this case, it is raised by one level.

Next, the output value of the optical dust detector and the air volume of the blower in the above control will be described with reference to time charts shown in FIGS. In the case of the cigarette smoke shown in FIG.
Since the dust concentration value does not exceed the dust concentration determination reference value in the sampling section, the first comparing means 18 samples and averages the dust concentration values to obtain an average dust concentration. As a result, since the average dust concentration value is equal to or less than the “low level” of the dust concentration reference value, the blower 8 is not driven.

Next, in the sampling section, since the dust concentration value exceeds the dust concentration determination reference value at point a, the second comparing means 19 determines that the dust concentration value has continued from point a for a predetermined time T seconds or more. Determine if the value is exceeded. However, since the time was less than T seconds at the point a, the comparison is similarly performed at the point b where the dust concentration value exceeds the dust concentration determination reference value. b
At this point, since the time was T seconds or more, the blower control means 16 sets the airflow level of the blower 8 to be increased by one and set to a “weak level”.

In the case of the futon dust shown in FIG. 6, since the dust concentration value does not exceed the dust concentration determination reference value in the sampling period, the first comparing means 18 sequentially sets the dust concentration every time the sampling period ends. The air volume is set by comparing the density reference value with the averaged average dust density value. In the case of this embodiment, since the average dust concentration value is equal to or less than the dust concentration reference value “weak level” in the sampling section,
The blower 8 is not driven. In addition, since the average dust concentration value is equal to or higher than the dust concentration reference value “medium level” in the sampling section, the air volume of the blower 8 is set to “medium level” after the end of the sampling process.

As described above, the rise of the dust concentration while rapidly oscillating, such as the cigarette smoke, is determined by the second comparing means 19 so that the air volume of the blower 8 changes stepwise. Therefore, even if the dust concentration reference value of the first comparing means 18 is set to a low value, the blower 8 does not suddenly reach the maximum air volume, and the futon dust is reliably removed without giving the user discomfort. Can be removed.

On the other hand, with respect to the one-shot pulse at the time of cleaning, malfunction can be prevented by performing sampling processing by the first comparing means 18 as in the conventional case. Even in the case where there is a pulse, the malfunction is avoided by comparing the time exceeding the dust concentration determination reference value with the predetermined time T by the second comparing means 19 continuously.

[0029]

As described above, in the air purifier of the present invention, when the output value of the dust concentration rises while vibrating rapidly, such as cigarette smoke, the sampling processing by the first comparing means is performed. Even if the operation is not completed, the air volume of the blower can be changed by the second comparing means when the dust concentration value continuously exceeds the dust concentration determination reference value for a predetermined time, so that operation corresponding to the dust concentration becomes possible. Since the plurality of dust concentration reference values of the first comparison means can be set low without giving the user any discomfort, it is possible to more reliably detect even a small output such as futon dust. , Can be removed. In addition, the air purifier has various effects such as erroneous operation due to one-shot pulse noise during cleaning can be reliably avoided.

According to the second aspect of the present invention, when the dust concentration value continuously exceeds the dust concentration determination reference value for a predetermined time by the second comparing means, the air volume level of the blower is increased stepwise. As a result, the air cleaner becomes more practical.

According to the third aspect of the present invention, the dust concentration determination reference value is set to be larger than the maximum value of the plurality of stages of dust concentration reference values stored in advance by the first comparing means, thereby achieving the above-described operation and effect. Is a highly practical air purifier that more reliably demonstrates

[Brief description of the drawings]

FIG. 1 is an external view of an air purifier of the present embodiment and a conventional example.

FIG. 2 is an explanatory cross-sectional view of a main part of the embodiment and a conventional air purifier.

FIG. 3 is a configuration diagram illustrating a control unit of the present embodiment.

FIG. 4 is a flowchart illustrating an operation of a control unit according to the present embodiment.

FIG. 5 is a time chart showing an output value and an air volume of a blower when an optical dust detector detects cigarette smoke in the present embodiment.

FIG. 6 is a time chart showing an output value and an air volume of a blower when an optical dust detector detects futon dust in the present embodiment.

FIG. 7 is a configuration diagram illustrating a control unit of a conventional example.

FIG. 8 is a flowchart showing the operation of a control unit in a conventional example.

FIG. 9 is a time chart showing an output value and an air volume of a blower when an optical dust detector detects cigarette smoke in a conventional example.

FIG. 10 is a time chart showing an output value and an air volume of a blower when an optical dust detector detects futon dust in a conventional example.

FIG. 11 is a time chart showing an output value of an optical dust detector and an air volume of a blower during cleaning in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 8 Blower 7 Dust collection part 12 Optical dust detector 13 Control part 17 Judgment means 18 First comparison means 19 Second comparison means

Claims (3)

(57) [Claims] A dust collector for adsorbing and removing dust and the like, an optical dust detector for detecting dust concentration, and a dust concentration value detected by the optical dust detector. In an air purifier including a control unit that controls a blower, the control unit determines and compares the dust concentration value with a previously stored dust concentration determination reference value, and samples the dust concentration value for a predetermined time. First comparing means for comparing the averaged dust concentration value averaged and the previously stored dust concentration reference values in a plurality of stages, and the time in which the dust concentration value continuously exceeds the dust concentration determination reference value is stored in advance. A second comparing unit that compares the dust concentration value with a predetermined time, and controls the blower based on a comparison result of the first comparing unit or the second comparing unit after comparing and determining the dust concentration value with the determining unit. The sky characterized by Air purifier. 2. When the dust concentration value continuously exceeds the dust concentration determination reference value for a predetermined time by the second comparing means, the control unit increases the air volume level of the blower in a stepwise manner. The air purifier according to claim 1, wherein 3. The air purifier according to claim 1, wherein the dust concentration determination reference value is larger than a maximum value of a plurality of stages of dust concentration reference values stored in advance by the first comparing means.