JPS63291616A - Air cleaner - Google Patents

Abstract

PURPOSE:To make it possible to operate an apparatus in response to the degree of purity of air, by providing a damper which causes a filter portion to be by-passed at a signal from a sensor and a mechanism which controls the number of revolution of a fan by detecting pressure in the apparatus. CONSTITUTION:The body 11 of an air cleaner takes a box-like shape, wherein a fan 12 is housed and a blow-off port 13 is formed at the upper portion of the body 11. A filter 14 and a by-pass damper 16 which is opened and closed by a motor 15 are provided at the blow-off port 13. The drive motor 15 is adapted to be operated by a signal of a first detecting sensor 17 which detects the degree of purity of the indoor air. And in the body 11, a second detecting sensor 19 to detect pressure is provided so as to control the rotation of the fan 12 through an inverter 18 based on detected values. Consequently, frequency of use of a filter decreases, so that life of the filter can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an air purifying device for purifying indoor air.

(Prior Art) Air purifiers are used to keep indoor air clean by removing dust, smoke, odor, etc. from indoor air. The structure of a typical air purifier is shown in Figure 4. After the indoor air is sucked into the main body 2 by the main body incorporating the 11.1 and 1.1, the indoor air is purified by letting it flow out through the filter 4 of the blowing part 3.

By the way, the conventional air purifier is structured so that the blower 1 is rotated at a predetermined rotation speed even if the indoor air improves to below the target value of the cleanliness class. In other words,
The blower 1 had to be driven at a high rotational speed so as to obtain a predetermined static pressure, that is, the amount of air blown, regardless of the cleanliness of the air passing through the filter 4. There was an increase in costs. Further, if the blower 1 is constantly driven at a high rotational speed, not only will noise and imaging become louder, but the filter may become clogged early, resulting in a shortened service life.

(Problems to be solved by the invention) In this way, conventional air purifiers drive the blower at a constant high rotational speed regardless of the cleanliness of the air, which reduces energy loss and increases in noise and vibration. In some cases, this may cause damage to the filter or shorten the life of the filter.

This invention was made based on the above circumstances, and its purpose is to provide an air purifier if& that can control the rotational speed of a blower according to the cleanliness of the air.

[Structure of the Invention] (Means and Effects for Solving the Problems) In order to solve the above problems, the present invention provides a main body in which a blower is provided, a blow-off section formed in the main body, and a A filter provided in the blow-off section that allows the air from the blower to pass through, a bypass damper that allows the air to pass through without passing through the filter, a first sensor that detects the cleanliness of indoor air, and from the first sensor. a drive unit that opens and closes the bypass damper based on a signal from the main body, a second sensor that detects the pressure inside the main body, and a control unit that controls the rotation speed of the blower based on the detection signal from the second sensor. Be equipped. When the cleanliness of the indoor air improves, the bypass damper is opened to lower the rotational speed of the feeder In.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. The air cleaning device shown in FIG. 1 includes a main body 11. The air cleaning device shown in FIG. This main body 11 has a box shape, and an air blower 812 is housed inside the main body 11, and an air blower 13 is provided at the upper part of the front surface.
is formed.

This blow-off section 13 is provided with an ultra-high performance filter 14 and a bypass damper 16 that is driven to open and close by a drive motor 15. The drive motor 15 is operated by a signal from a first detection sensor 17 that detects the cleanliness of the room. In other words, the first detection sensor 17 detects impurities in the air such as indoor CO2 and smoke m*, and when the indoor cleanliness level is below class 1000, the bypass damper 16 is opened, and when it is above 10000 class, the bypass damper 16 is opened. It is controlled so that

An inverter 18 as a control section is connected to the blower 12, and a second detection sensor 19 for detecting the static pressure inside the main body 11 is connected to the inverter 18. When the detection signal from the second detection sensor 19 is input to the inverter 18, the rotation speed of the blower 12 is controlled thereby. That is, when the static pressure inside the main body 11 detected by the second detection sensor 19 is as low as, for example, 10 sAq, the air blower 1fi12 is driven to rotate at a low speed by the detection signal. Further, when the static pressure detected by the second detection sensor 19 is as high as, for example, about 30 awAQ, the feed 1!
The rotation of 1f112 is controlled at high speed.

Next, the operation of the air cleaning device having the above structure will be explained with reference to FIG. 3. For example, when the indoor air cleanliness is as high as class 1000 or lower, such as in the early morning, when this is detected by the first detection sensor 17, the drive motor 15 is activated so that the bypass damper 16 is opened in response to the detection signal. is driven. When the bypass damper 16 is opened,
The air blown from the blower 12 does not pass through the filter 14, but instead flows through the opening of the part of the blow-off section 13 where the bypass damper 16 is opened, where there is almost no flow resistance. Then, the air from the air blower 1112 flows out of the main body 1 smoothly, so that the static pressure inside the main body 11 hardly increases. In other words, body 1
Since the static pressure inside the air blower 112 is maintained at about 10JIIIAq, for example, the air blower 112 is operated at a low speed (NL) based on a detection signal from the second detection sensor 19 that detects this.

As described above, when the indoor cleanliness level decreases due to continued operation with the bypass damper 16 open and its class reaches 10,000 or higher, a signal from the first detection sensor 17 that detects this decreases. Bypass damper 16
is closed. Then, since the air from the blower 12 passes through the filter 14, the static pressure inside the main body 11 increases to, for example, 30 sAq due to the flow path resistance of the filter 14. In this way, when the static pressure within the main body 11 increases and a signal from the second detection sensor 19 that detects this is input to the inverter 18, the rotational speed of the air blower 8112 is thereby increased. In other words, the bypass damper 16
When the flow path resistance increases due to closing of the air blower 12, the blower 12 is driven to rotate at high speed (NH) in order to keep the amount of air blown constant.

When such ventilation operation continues for a predetermined period of time, the cleanliness of the indoor air increases again due to the degrading action of the filter 14. When the cleanliness level falls below class 1000, the bypass damper 16 is opened in response to a signal from the first detection sensor 17 that detects this, and the static pressure inside the main body 11 decreases. The operation will be repeated with the rotational speed of the engine being lowered.

That is, according to the air purifier VR@ having the above structure, the rotation speed of the blower 12 is controlled according to the cleanliness of the indoor air, so the method 1! Compared to the case where IN112 continues to rotate at high speed, not only can energy be saved, but also noise generation can be reduced. Furthermore, since the frequency of use of the filter 14 decreases, the filter 14
The lifespan of can be extended.

[Effects of the Invention] As described above, the present invention provides a filter and a bypass damper in the blow-off portion of the main body, and controls opening and closing of the bypass damper using a signal from a first sensor that detects the cleanliness of indoor air. The number of revolutions of the blower is controlled by a signal from a second sensor that detects the pressure inside the main body. Therefore, since the rotation speed of the blower is controlled according to the cleanliness of the indoor air detected by the first sensor, running costs are reduced compared to the conventional method in which the blower was always operated at a constant rotation speed. In addition to being able to measure noise reduction and noise reduction,
Since the frequency of use of the filter is reduced, this has the advantage that the life of the filter can be extended.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an apparatus in which the bypass damper is closed, showing an embodiment of the present invention, Fig. 2 is a schematic diagram of the device in which the bypass damper is open, and Fig. 3 is a schematic diagram of the device in which the bypass damper is open. FIG. 4, which is an explanatory diagram of the relationship between the opening and closing of the bypass damper and the rotational speed of the blower, is a schematic diagram of a conventional device. DESCRIPTION OF SYMBOLS 11... Main body, 12... Air volume, 13... Blower part, 14... Filter, 15... Drive motor, 17...
...first sensor, 18...inverter (control unit),
19...Second sensor. Applicant's agent Patent attorney Takehiko Suzue Figure 4

Claims (1)

[Claims] A main body in which an air blower is provided, a blowout part formed in the main body, a filter provided in the blowout part that allows air from the blower to pass through, and a bypass damper that allows the air to pass through without passing through the filter. , a first sensor that detects the cleanliness of indoor air, a drive section that opens and closes the bypass damper based on a signal from the first sensor, a second sensor that detects the pressure inside the main body, and a second sensor that detects the pressure inside the main body. An air purifying device comprising: a control section that controls the rotation speed of the blower based on a detection signal from the second sensor.