JPH11294816A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a room equally as a whole, and equalize the distribution of an air current, by arranging an air conditioning duct in the rear of the ceiling of a room and a branch connection box at the downside of the ceiling, extending an indoor duct horizontally from the box, and attaching a filter for air cleaning to the downside of the indoor duct. SOLUTION: A air conditioning duct 8 in the rear 9c of the ceiling of the room 9 that the user wants to clean, and a branch connection box 2 at the downside 9b of the ceiling, are arranged continuously, and indoor ducts 3 and 4 are extended horizontally from the box 2. The bottom end face of the box 2 and the downside of the indoor ducts 3 and 4 are arranged to form a horizontal surface, and a filter 5 for air cleaning is attached and fixed to the downside of the ducts 3 and 4. A rectifying plate 6 to serve as air nozzles directed in all directions inside the room 9 are attached downstream of the filter 5. Moreover, the air conditioning duct 8 is provided with a blower for air circulation on its upstream. The rectifying plate 6 equalizes the air current when the width of the room 9 is narrow.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus which can easily form a dust-free and sterile clean room in the fields of semiconductor industry, optical equipment, precision equipment, electronic equipment, medical equipment, food brewing and the like.

[0002]

2. Description of the Related Art Conventionally, as an air purifying apparatus such as a clean room or a clean booth, for example, Japanese Utility Model Publication No.
As shown in JP-A-707, an air inlet and a blower are arranged outside a chamber for purifying air,
There is a laminar flow type clean room in which a filter is arranged above the ceiling of the room and the clean air is blown out from the entire surface of the ceiling. However, in the case of such a clean room,
Since it is necessary to provide a clean air passage above the ceiling and various facilities for purifying the air outside the room, not only is the installation of the air purifier a major task, but also the existing room becomes a clean room. In order to do so, there is a disadvantage that a major remodeling is required in which the existing ceiling and walls are demolished and an air cleaning device is installed. Also, since the indoor air is only exhausted from the exhaust port provided on the side wall surface near the floor using the pressure difference, the clean air flowing down to the upper surface of the work table etc. installed indoors There is a drawback that a phenomenon occurs, and dust on the upper surface of the work table and the like also rises together. Furthermore, the blown clean air is
It is discharged from the lower part of the side wall of the room to the outside, and then new dust-containing air is sucked in from the suction port and passes through the filter, so it takes a long time to clean and the operating efficiency of the air filter does not increase There are drawbacks. Furthermore, since the exhaust port is opened at the lower side, the cleaning air blown out from the entire ceiling flows obliquely toward the exhaust port,
There is a drawback that it is difficult to purify air uniformly in all rooms.

[0003] In order to solve the above-mentioned problems, for example, there is an air purifying apparatus as disclosed in Japanese Patent Publication No. 3-48417. This device is arranged in a closed room, and is to make the room a clean room, at least one side of the device is in close contact with the room, and the upper end surface of the column-shaped main body is in close contact with the lower surface of the ceiling, The pillar-shaped main body extends horizontally from an upper part of the pillar-shaped main body, and has a wind pipe that contacts at least an upper surface of the column-shaped main body with a ceiling of a room.The column-shaped main body has relatively short legs and an air suction port on a lower surface thereof. Inside, it has an air passage in which a blower for air circulation and a filter for air cleaning are built in, and the wind conduit is substantially the same width as the columnar main body and has a length equal to the length of the ceiling of the room in the extending direction. The upper end surface of the pillar-shaped main body and the upper surface of the wind conduit form a series of horizontal planes, and the entire length is formed to be equal to the ceiling length of the room in the wind conduit extending direction. Has made. However, in such an air purifying device, since the wind speed of the air blown out of the wind duct adjacent to the pillar-shaped main body is different from the wind speed of the air blown out of the wind duct separated from the pillar-shaped main body, the air blowing in the room is There is a problem that the distribution of the airflow cannot be made uniform.

[0004] In order to solve such a problem, for example, there is an air purifying apparatus as disclosed in Japanese Patent Application Laid-Open No. 6-66439. That is, in this device, the air whose temperature and humidity are controlled by the air conditioner provided outside the clean room is guided to the HEPA filter through the air duct. The air cleaned by the filter is sent to a plurality of air supply units formed of perforated plates extending linearly into the room. This air supply unit is an air supply duct disposed on the ceiling of a clean room, and is formed of a perforated plate extending in the longitudinal direction of the room, and the hole diameter of the perforated plate is equal to or less than the plate thickness. Further, in this air supply unit, the cross-sectional area of the flow path of the air is gradually reduced from the upstream side to the downstream side, and the flow path for adjusting the flow direction of the inflow air is provided at the air inlet. An adjusting body is provided.
In this air supply unit, the speed of air flowing out of each hole of the perforated plate is constant from the upstream side to the downstream side, but it can be applied only to a duct of a predetermined length from the end to the end of the room Therefore, it is not possible to change the length of the duct after constructing only necessary parts, and there is a problem of lack of so-called flexibility.

Accordingly, the present applicant has disclosed in Japanese Patent Application Laid-Open No. 8-28920.
As shown in the publication, the air supply unit is disposed on the inner wall surface of the room at least one side of which is to be cleaned, and a duct extending in a horizontal direction of the air supply unit, and the air supply unit is It has an air inlet at the bottom and has an air passage in which a blower for air circulation is installed, and the blower unit and the duct are
An air purifying apparatus for a clean room is proposed in which an upper end surface of a blower unit and an upper surface of a duct are disposed so as to form a horizontal plane, and an air purifying filter is attached and fixed to a lower surface of the duct. In the case of the air purifying apparatus for a clean room proposed in Japanese Patent Application Laid-Open No. 8-28920, improvement work on the ceiling and walls of the room is necessary in order to install it in an existing room, or the temperature may be increased. Too much energy to adjust the humidity and humidity, the entire room cannot be uniformly cleaned, and the degree of cleaning cannot be freely adjusted,
The problem of lack of flexibility is solved, and it can be installed in the clean room without performing improvement work on the ceiling, walls, etc. of the existing clean room, and the entire clean room can be uniformly cleaned. The point was excellent.

However, since the supply of air is a one-way flow via a blower unit, the size of the room to be cleaned is increased, and a large number of air purifiers are connected to supply a large amount of air. When the wind speed blown out of the duct on the side of the blower unit is compared with the wind speed blown out of the duct on the side opposite to the blower unit, there is a problem that the blower unit side is faster. Therefore, we tried to increase the width of the duct in consideration of the balance of wind speed.However, as the width of the duct was widened, dead space was created in the filter blowout, making it difficult for the laminar flow to occur. Improvements have been sought from the point that there is a limit to the length even if the entire duct has a uniform wind speed distribution. Therefore, an object of the present invention is to solve such a problem and use an air-conditioning duct at the ceiling of an existing clean room and install an indoor duct in the clean room to supply a large amount of air. An object of the present invention is to provide an air purifying apparatus that can uniformly clean the entire inside of the clean room.

[0007]

According to the present invention, there is provided an air purifying apparatus for solving the above-mentioned problems.
A branch connection box connected to an air-conditioning duct disposed on the underside of the ceiling of the room to be cleaned, and a branch connection box disposed on the underside of the ceiling of the room to be cleaned; and an indoor duct extending horizontally from the branch connection box The lower surface of the branch connection box and the lower surface of the indoor duct are disposed so as to form a horizontal plane, and an air cleaning filter is attached and fixed to the lower surface of the indoor duct. An air purifying apparatus according to a second aspect is characterized in that, in the air purifying apparatus according to the first aspect, the branch connection box is partially embedded in the ceiling. According to a third aspect of the present invention, in the air purifying apparatus of the first aspect, the branch connection box and the indoor duct are provided in contact with a ceiling surface, and the connection box is connected via a connection duct. It is characterized by being connected to the air conditioning duct. Further, the air purifying apparatus according to claim 4 is the same as claim 1.
4. The air purifying apparatus according to any one of the above aspects, wherein a partition is provided in the branch connection box so as to branch in at least two directions. According to a fifth aspect of the present invention, there is provided an air purifying apparatus according to any one of the first to fourth aspects, wherein a plurality of the indoor ducts are extended. According to a sixth aspect of the present invention, there is provided the air purifying apparatus according to any one of the first to fifth aspects, wherein the indoor duct is not fixedly provided with the air purifying filter and the rectifying plate. , And a combination of these components mounted and fixed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the air purifying apparatus of the present invention, as described above, the air purifying apparatus is disposed on the underside of the ceiling of the room to be cleaned, is connected to the air conditioning duct, and is disposed on the underside of the ceiling of the room to be cleaned. Branch connection box, and an indoor duct extending horizontally from the branch connection box, and the lower surface of the branch connection box and the lower surface of the indoor duct are disposed so as to form a horizontal plane, and the indoor duct The air purifying filter is attached and fixed to the lower surface of the air conditioner, so the air conditioner is installed outside the room, it can be installed in the existing clean room that circulates the outdoor, and the ceiling using the existing air conditioning duct Improvement work on parts, walls, etc. is unnecessary as much as possible,
The construction period can be shortened and construction costs can be reduced. Even if the air volume is increased, the use of the branch connection box makes it possible to equalize the average wind speed of the air blown from the air conditioning duct to the indoor duct through the branch connection box without increasing the duct width. .

Further, since the filter is provided on the lower surface of the indoor duct, the air supplied through the indoor duct is laminarized by using the filter as a resistor, and although not necessarily required, the air flows in all directions in the room. When a rectifying plate that directs air is provided downstream of the filter as an air outlet, the generation of eddies immediately below the air outlet is reduced, laminar flow can be achieved, and not only directly below the outlet but also throughout the room. Air can be blown out uniformly.

In the case where the branch connection box is partially embedded in the ceiling, the work of drilling holes in the ceiling becomes a little large, but the capacity of the branch connection box can be increased and the branch connection box can be made large. Can also supply air to the indoor duct in a laminar flow state.

When the branch connection box and the indoor duct are provided in contact with the ceiling surface, it is necessary to connect the connection box to the air conditioning duct through the connection duct. Less is needed.

Further, by providing a partition at the center of the branch connection box so as to be able to branch in at least two directions, it is possible to further uniform the average wind speed of blowing air. Moreover,
In addition to simply making the average wind speed of the blowout uniform, the air is buffered for each indoor duct, so that the airflow distribution in the indoor duct can be further uniformed.

Further, a plurality of indoor ducts can be extended, and if necessary, the indoor ducts can be connected.
It may be omitted, or it may be configured by combining an air purifying filter and a rectifier plate that is not fixedly mounted with those that are fixedly mounted, and efficiently blows clean air only to a desired place. , With flexibility.

[0014]

(Embodiment 1) Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal side view of one embodiment of the air purifying apparatus of the present invention, and FIG. 2 is a plan view of the apparatus shown in FIG. As shown in FIG. 1, the air purifying apparatus of the present embodiment is connected to an air-conditioning duct 8 arranged on the side of the ceiling back surface 9c of the room 9 to be cleaned, and the lower surface of the ceiling of the room 9 to be cleaned. 9b is composed of a branch connection box 2 partially buried in an upper part thereof, and indoor ducts 3 and 4 extending horizontally from the branch connection box 2, and the air conditioning duct 8 is not shown. Has a blower for air circulation upstream thereof, and the lower end surface of the branch connection box 2 and the lower surfaces of the indoor ducts 3 and 4 are disposed so as to form a horizontal plane. A filter 5 for air cleaning and a rectifying plate 6 are attached and fixed to the lower surface of. A partition 10 is provided at the center of the branch connection box so that the indoor ducts 3 and 4 can branch in two directions.

In the illustrated case, two indoor ducts 3 and 4 are provided.
The lower surface of each filter is open toward the room 9, and as shown in FIG. 2, the filter 5 is press-fitted to the downstream surface of these openings via a gasket (not shown) and attached and fixed. Have been.

In this embodiment, a rectifying plate 6 serving as an air outlet directed in all directions in the room 9 is mounted and fixed to the downstream side of the filter 5. The rectifying plate 6 is provided in a room (clean room).
When the width of the space 9 is narrow, it is useful for making the airflow distribution uniform, but it is not always necessary for the room 9 having a wide space. The shape of the current plate 6 is not particularly limited, and may be, for example, a flat shape or a chevron shape. However, since the chevron shape can blow air in all directions in the room 9 more than the flat shape, the airflow distribution is uniform. Is excellent.

The dimensions of the indoor ducts 3 and 4 are not limited to a specific length corresponding to the length of the ceiling of the room 9, and by extending a plurality of the ducts, only the desired space can be obtained. Can be cleaned. In the drawing, 9a indicates a floor surface, and 7 indicates a circulation duct.

In the above-described embodiment, the ducts 3 and 4 connected to the branch connection box 2 are provided in two rows. However, the present invention is not limited to this. Good. In addition, a sound absorbing material can be exhibited inside the branch connection box 2 so as to function as a sound deadening box. The ducts 3 and 4 are configured as indoor ducts 3 and 4 in which a portion to which an air cleaning filter 5 and a rectifying plate 6 as an air outlet are fixed and a portion to which they are not fixed are combined. The arrangement may be appropriately selected according to the desired cleanliness. still,
Although not shown, an empty box may be provided at a portion corresponding to the filter 5, and a non-perforated plate may be provided at a portion corresponding to the rectifying plate 6.

(Embodiment 2) FIG. 3 is a longitudinal side view of another embodiment of the air purifying apparatus of the present invention, and FIG. 4 is a plan view of the apparatus shown in FIG. In the present embodiment, in the case of the above-described embodiment, the branch connection box 2 is arranged so as to be partially embedded in the lower surface 9b of the ceiling, but in the present embodiment, the branch connection box 2 and the indoor duct 3 are arranged. , 4 are provided in contact with the lower surface 9 b of the ceiling, and the connection box 2 is connected to the air conditioning duct 8 via the connection duct 11. Since other configurations are the same as those of the above-described embodiment, the same members as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

[0020]

As is clear from the above description, in the air purifying apparatus of the present invention, the existing air-conditioning duct can be used, and the improvement work on the ceiling and the wall of the clean room is unnecessary as much as possible, and the construction period is shortened. And construction costs can be reduced. In addition, when supplying a large amount of air with a large number of connected air purifiers, a uniform wind speed distribution can be achieved throughout the indoor duct without increasing the width of the indoor duct, so it is difficult to achieve laminar flow due to the dead space of the filter. In addition, there is no variation in the air volume distribution even when the indoor duct is long. Also,
Since air is uniformly blown out of the indoor duct below the ceiling, laminar flow can be achieved without generating a vortex just below the outlet. Further, by providing a filter near the outlet of the indoor duct, the air supplied through the indoor duct is rectified by the resistance of the air filter, and the airflow distribution is made uniform.

[Detailed description of drawings]

FIG. 1 is a vertical side view of an air purifying apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the device shown in FIG.

FIG. 3 is a vertical side view of an air cleaning device according to another embodiment of the present invention.

FIG. 4 is a plan view of the device shown in FIG.

[Description of Signs] 1 Air purification device 2 Branch connection box 3 Indoor duct 4 Indoor duct 5 Filter 6 Rectifier plate 7 Circulation duct 8 Air conditioning duct 9a Floor surface 9b Ceiling lower surface 9c Ceiling back surface 10 Partition 11 Connection duct

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yojiro Miyaji 415 Sakunodani, Yuki-shi, Ibaraki Pref. Japan Inorganic Co., Ltd. Inside Yuki Plant (72) Inventor Takayuki Nokura 415 Sakunoya, Yuki-shi, Ibaraki Pref. Yuki factory

Claims (6)

[Claims] 1. A branch connection box connected to an air-conditioning duct disposed on the back side of a ceiling of a room to be cleaned, and a branch connection box disposed on a lower surface of the ceiling of the room to be cleaned, and extending horizontally from the branch connection box. The lower surface of the branch connection box and the lower surface of the indoor duct are disposed so as to form a horizontal surface, and the air purifying filter is fixed to the lower surface of the indoor duct. Characterized air purifier. 2. The air purifying apparatus according to claim 1, wherein the branch connection box is partially embedded in a ceiling. 3. The air purifier according to claim 1, wherein the branch connection box and the indoor duct are provided in contact with a ceiling surface, and the connection box is connected to the air conditioning duct via a connection duct. Device. 4. At least two in the branch connection box
The air purifier according to any one of claims 1 to 3, wherein a partition is provided so as to branch in a direction. 5. The air purifying apparatus according to claim 1, wherein a plurality of said indoor ducts are extended. 6. The air conditioning system according to claim 1, wherein the indoor duct is formed by a combination of an air purifying filter and a straightening plate to which no air filter and a current plate are fixed. An air purifying apparatus according to item 1.