JPH0144086B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an air cleaning device, and particularly to a low-noise, lightweight, and thin air cleaning device having a collection efficiency of 99.97% or more.

BACKGROUND OF THE INVENTION Ultra-high cleanliness is required in fields such as semiconductor industry, electronic industry, precision machinery industry, biotechnology, pharmaceutical industry, and hospitals. Clean spaces include clean rooms that clean the entire work environment, clean benches and clean booths that clean the work environment locally. Air cleaning devices that combine a blower and a filter to create such a clean space are already known. All of these conventional devices have extremely large thicknesses (depths), so they are large and heavy as a whole. Therefore, it generates a lot of noise, requires a large installation space, and is not easy to install.

OBJECTS OF THE INVENTION An object of the present invention is to provide an air cleaning device that has extremely high collection efficiency, excellent air blowing performance, low noise, and is lightweight and thin. Another object of the present invention is to provide an air cleaning device that can provide a uniform air velocity distribution. Another object of the present invention is to provide an air cleaning device that requires significantly less installation space. Still another object of the present invention is to provide an air cleaning device that is extremely easy to replace and remove because the blower and filter are lightweight and thin.

Summary of the Invention The air purifying device of the present invention includes at least a pair of lightweight, thin air blowers arranged in parallel in a casing so that air blowing directions from each outlet are opposite to each other, and a lightweight, thin air filter placed in front of the blowers. and a partition plate located between the respective blowers to partition the discharge flows of the respective blowers in order to prevent the discharge flows of the respective blowers from being unified, thereby achieving the above object. The air purifying device of the present invention further includes a blind plate disposed in front of the blower and behind the filter with a predetermined gap from one side of the casing. The above objective is achieved.

Example The present invention will be described below with reference to Examples.

As shown in FIGS. 1 to 3, the air cleaning device 1 of the present invention includes at least a pair of blowers 3 in a housing 2 and an air filter 4 disposed in front of the blowers 3. As shown in FIGS. The pair of blowers 3 are arranged in parallel so that their discharge ports 31 face each other. The thickness (depth) of this blower 3 is less than half that of the conventional type, and its weight is therefore significantly reduced. Filter 4 is 0.3μm monodisperse
99.97 for DOP (dioctyl phthalate) particles
% or more. Its thickness is also the same as that of conventional
It is less than 2/5 of 150mm. Such ultra-high performance air filters include, for example, HEPA (High
Efficiency Particulate Air) filter.
A pre-filter 4 is installed behind the blower 3 as required.
1 can be placed.

A partition plate 5 is arranged between the blowers 3. This partition plate 5 is for preventing the air discharged from the discharge ports 31 of the left and right blowers 3 from interfering with each other and causing abnormal airflow, which would result in noise. In order to prevent the airflow discharged from the blower 3 from becoming turbulent, guide vanes 51 are provided at both ends of the partition plate 5 so as to contact the inner wall of the housing 2 with a smooth curvature.

While the noise (JIS: scale A) at a point 1 m in front of the device without the partition plate 5 is 55 dB, when the partition plate 5 is provided, the noise is reduced to 50 dB. The material of the partition plate 5 does not need to be any special material, as long as it can withstand the wind pressure from the blower 3. Usually used for plastic plates, etc.

Since the airflow discharged from the discharge port 31 of the blower 3 is fast inside the blower and slow outside the blower, the dynamic pressure of the entire discharged airflow is non-uniform. While the air flow having such non-uniform dynamic pressure passes through a sufficiently long flow path, the dynamic pressure is gradually weakened and changed to static pressure. As a means to make the air flow path sufficiently long, for example, a blind plate 6 is installed in front of the blower 3 and behind the filter 4.
is placed. The blind plate 6 is orthogonal to the partition plate 5 of the housing 2 and is disposed with a predetermined gap 61 from the side surface 21 on the far side from the discharge port 31 of the blower 3. The air discharged from the outlet 31 of the blower 3 flows over the blind plate 6 along the partition plate 5, passes through the gap 61 between the side surface 21 perpendicular to the partition plate 5 and the edge of the blind plate 6, and passes through the gap 61 between the edge of the blind plate 6 and the blind plate 6. Bottom surface of 6 and filter 4
flows between. In this way, while the airflow discharged from the outlet 31 of the blower 3 flows along the blind plate 6, its dynamic pressure is reduced and changed to static pressure. The airflow with a weakened dynamic pressure hits the entire back surface of the filter 4 uniformly and gently, and passes through the filter 4 while forming a uniform wind speed distribution.

As shown in FIG. 4, the blower 3 can be installed at an eccentric position within the housing 2 so that its discharge space 32 is wide. The airflow discharged from the blower outlet 31 flows out into the wide discharge space 32, thereby reducing its dynamic pressure and becoming a gentle airflow. Since this further enters the gap between the blind plate 6 and the back surface of the filter 4, a gentle and uniform air flow is supplied to the back surface of the filter 4. When the blower 3 is installed at an eccentric position, in order to further widen the discharge space 32, a partition plate 5 may be arranged to connect the inner ends 311 of the discharge ports 31, as shown in FIG. can. In this case, the blind plates 6 and 6 are arranged in the center of one housing 2 with gaps 61 and 61 separated by the partition plate 5. The airflow discharged from the outlet 31 of one blower 3 advances below the blind plate 6 on the lower side of the other blower 3 and enters the back surface of the filter 4 .

Effects of the Invention The air purifying device of the present invention reduces noise and has high air blowing performance because the air blown out from each blower does not interfere with each other and flows gently with a uniform wind speed distribution. Furthermore, since an ultra-thin blower and an ultra-thin air filter are used, the entire device is lightweight and thin. Therefore, it is extremely easy to install the device and replace filters and the like. Since the installation space is small, it can be installed in a small work space with energy savings in mind, thereby contributing to energy savings. This device is particularly effective for clean bench use.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of the device of the present invention, FIG. 2 is a sectional view taken along the - line in FIG. 1, FIG. 3 is a sectional view taken along the - line in FIG. 1, and FIGS. FIG. 2 is a partially cutaway plan view showing another embodiment of the device of the present invention. 1... Air cleaning device, 2... Housing, 3... Air blower, 4... Air filter, 41... Prefilter, 5
...Partition plate, 6...Blind plate, 31...Blower outlet, 32
...Discharge space, 51...Guide vane.

Claims (1)

[Scope of Claims] 1. At least a pair of lightweight, thin air blowers arranged in parallel in a casing so that air blowing directions from each outlet are opposite to each other, a lightweight, thin air filter placed in front of the blowers, and each of the blowers. An air purifying device having a partition plate located between the air blowers and partitioning the discharge flows of the respective blowers to prevent the discharge flows of the respective blowers from being unified. 2. The device according to claim 1, wherein the blower is provided at an eccentric position within the housing so that its discharge space is wide. 3 At least one pair of lightweight, thin air blowers arranged in parallel inside the casing so that the air blowing directions from each outlet are opposite, a lightweight, thin air filter placed in front of the blowers, and a light and thin air filter located between each of the blowers, A partition plate that partitions the discharge flows of each blower in order to prevent the discharge flows of the blowers from being unified, and a partition plate that is located in front of the blower and behind the air filter,
The air purifying device has a blind plate disposed with a predetermined gap between one side of the casing. 4. The device according to claim 3, wherein the blower is provided at an eccentric position within the housing so that its discharge space is wide.