JP2553081B2 - Air purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) [0001] The present invention relates to an air cleaning device for cleaning indoor air.

(Prior Art) An air purifier is used to remove dust, smoke, odors, and the like from indoor air to keep the indoor air clean. As shown in FIG. 4, the structure of a general air purifying apparatus is such that a blower section 3 is formed in a main body 2 having a blower 1 built therein, and a filter 4 is provided in this blowout section 3. And the blower 1
The indoor air is sucked into the main body 2 by operating the above, and then the indoor air is made to flow out through the filter 4 of the blowout portion 3 to clean the indoor air.

By the way, in the conventional air purifier, the indoor air has a cleanliness class, that is, the diameter contained in a predetermined volume is 0.
Even if the number of fine particles having a size of about 3 μm is increased to the target value or less, the structure is such that the blower 1 is rotated at a predetermined rotation speed.
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, a blown air amount, regardless of the cleanliness of the air passing through the filter 4, so that the amount of power used increases. However, the running cost was high. Further, if the blower 1 is constantly driven at a high rotation speed, not only noise and vibration are increased, but also the filter is clogged early and the service life is shortened.

(Problems to be Solved by the Invention) As described above, in the conventional air cleaner, the blower is driven at a constant high rotation speed regardless of the cleanliness of the air.
There have been cases where energy loss, noise, and vibration are increased, and the filter life is shortened.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an air cleaning device capable of controlling the rotation speed of a blower according to the cleanliness of air.

[Structure of the Invention] (Means and Actions for Solving Problems) In order to solve the above problems, the present invention is directed to a main body provided with a blower therein, and a blowout to an indoor side formed in the main body. Section, a filter provided in the main body that allows the blower from the blower to pass therethrough and leads to the blower section, a bypass damper that guides the blower air from the blower to the blower section without passing through the filter, and cleanliness of the room air. The first sensor for detection and the signal from the first sensor open the bypass damper when the room cleanliness is higher than a predetermined value, and close it when the room cleanliness is lower than the predetermined value. A drive unit that opens and closes the bypass damper, a second sensor that detects the pressure in the main body, and a detection signal from the second sensor causes the blower to operate at a low speed when the static pressure in the main body is lower than a predetermined value. And again When high and a control unit for controlling the rotational speed of the blower so as to operate the blower at a high speed. Then, when the cleanliness of the indoor air is improved, the bypass damper is opened to lower the rotation speed of the blower.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. The air cleaning apparatus shown in FIG. 1 has a main body 11. The main body 11 has a box shape, a blower 12 is housed in the main body 11, and a blowout portion 13 is formed in the upper front portion. This outlet 13 has an ultra-high performance filter 14
And a bypass damper 16 that is opened and closed by a drive motor 15. The drive motor 15 is operated by a signal from the first detection sensor 17 which detects the cleanliness of the room. In other words, the first detection sensor 17 detects impurities in the air such as CO ₂ and smoke concentration in the room, and when the cleanliness of the room is class 1000 or less, the bypass damper 16 is opened to 10000. When the above cleanliness is low, it is controlled to be closed. Whether the cleanliness is high or low depends on what kind of place the measurement space is.For example, in the case of a general assembly plant, the cleanliness is high if it is class 1000 or lower and low if it is class 10,000 or higher. ing.

An inverter 18 as a control unit is connected to the blower 12, and a second detection sensor 19 for detecting static pressure inside the main body 11 is connected to the inverter 18. The detection signal from the second detection sensor 19 is the inverter
When input to 18, the rotation speed of the blower 12 is controlled by it. That is, the static pressure in the main body 11 detected by the second detection sensor 19 is, for example, 10
If it is as low as mmAq, the blower will be detected by the detected signal.
12 is rotationally driven at low speed. Further, when the static pressure detected by the second detection sensor 19 is as high as about 30 mmAq, the blower 12 is controlled to rotate at high speed.

Next, the operation of the air cleaning device having the above structure will be described with reference to FIG. For example, when the cleanliness of the indoor air is as high as class 1000 or less, such as in the early morning, when the first detection sensor 17 detects that, the drive motor 15 opens the bypass damper 16 by 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 and flows through the opening of the blowout part 13 of the blowout part 13 where there is almost no flow path resistance. Then, the air blown from the blower 12 smoothly flows out of the main body 1, so that the static pressure in the main body 11 is hardly increased. That is, the static pressure in the main body 11 is, for example, 10 mmAq.
The blower 12 is operated at a low speed (NL) by the detection signal from the second detection sensor 19 which detects that fact.

In this way, the cleanliness of the room is reduced by continuing the operation with the bypass damper 16 open, and when the class becomes 10,000 or more, it is detected that
The bypass damper 16 is closed by the signal from the detection sensor 17. Then, since the air blown from the blower 12 passes through the filter 14, the static pressure in the main body 11 increases to, for example, 30 mmAq due to the flow path resistance of the filter 14. In this way, when the static pressure in the main body 11 rises and the signal from the second detection sensor 19 that detects it is input to the inverter 18,
Thereby, the rotation speed of the blower 12 is increased. That is, when the bypass damper 16 is closed and the flow path resistance increases,
The blower 12 is rotationally driven at a high speed (NH) in order to keep the amount of blown air constant.

When such an air blowing operation is continued for a predetermined time, the cleanliness of the indoor air is increased again due to the dust removing action of the filter 14. When the cleanliness level becomes 1000 or less, the bypass damper 16 is opened by the signal from the first detection sensor 17 that detects it, and the static pressure in the main body 11 is reduced. The operation is repeated in the state in which the number of revolutions is reduced.

That is, according to the air purifying device having the above structure, the number of revolutions of the blower 12 is controlled according to the cleanliness of the room air, so energy is saved as compared with the case where the blower 12 is continuously rotated at a high speed. Not only can this be done, but noise generation can also be reduced. Furthermore, since the frequency of use of the filter 14 decreases, the life of the filter 14 can be extended.

[Effects of the Invention] As described above, according to the present invention, the filter and the bypass damper are provided in the blowout portion of the main body, and the opening and closing of the bypass damper is controlled by the signal from the first sensor that detects the cleanliness of the indoor air. The rotation speed of the blower is controlled by the signal from the second sensor that detects the pressure in the main body. Therefore, since the rotation speed of the blower is controlled according to the cleanliness of the room air detected by the first sensor, the running cost can be reduced as compared with the conventional case in which the blower is always operated at a constant rotation speed. The noise can be reduced, and the frequency of use of the filter is reduced, which has the advantage that the life of the filter can be extended.

[Brief description of drawings]

FIG. 1 is a schematic view of an apparatus according to an embodiment of the present invention with a bypass damper closed, FIG. 2 is a schematic view with the bypass damper open, and FIG. 3 similarly shows cleanliness of room air. FIG. 4 is an explanatory view of the relationship between opening and closing of the bypass damper and the rotation speed of the blower, and FIG. 4 is a schematic view of a conventional device. 11 …… Main body, 12 …… Blower, 13 …… Blowout section, 14 …… Filter, 15 …… Drive motor, 17 …… First sensor, 18 ……
Inverter (control unit), 19 ... Second sensor.

Claims (1)

(57) [Claims] 1. A main body having a blower therein, an indoor blower formed in the main body, and a filter for passing blown air from the blower provided in the main body to the blower. , A bypass damper that guides the air blown from the blower to the outlet without passing through this filter, a first sensor that detects the cleanliness of the indoor air, and a signal from the first sensor determines the cleanliness of the room. A drive unit that opens and closes the bypass damper so that the bypass damper is opened when the value is higher than a predetermined value, and is closed when the room cleanliness is lower than a predetermined value; and a second sensor that detects the pressure in the main body. When the static pressure in the main body is lower than a predetermined value by the detection signal from the second sensor, the blower is operated at a low speed, and when it is higher than the predetermined value, the rotation speed of the blower is controlled so as to operate at a high speed. Control unit to control Air cleaning apparatus characterized by Bei was.