JPH0522745Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Industrial Application Field) The present invention relates to an air blowing control device used in clean rooms, clean booths, etc. (Prior Art) Conventionally, as shown in FIG. 5, this type of clean air blowing device has a filter unit surrounding frame c that houses an air filter a and has a lower opening b.
A device for controlling the blowing of air by being attached to the lower opening b of A tiltable opening/closing plate h is arranged at the opening and is provided independently on the outside of the horizontal outlet f of this rectangular box-shaped frame g, and the opening/closing plate h controls the air in the lateral direction of the horizontal outlet f. A device is known in which the blowout amount is adjusted individually. In the device, a filter unit surrounding frame c is airtightly fixed to the opening periphery j of a ceiling plate i, a fan k installed in the ceiling etc. is driven, and the air from the fan k is filtered by the air filter a. Clean air is blown into the room from the downward blowing perforated plate d and the side blowing holes f, while creating a circulation flow that sucks the contaminated air in the room from the floor or side wall of the room, making the room a clean room. For example, microorganism cultivation work is performed on a clean bench placed below the air blowing control device. (Problem to be Solved by the Invention) However, in the conventional device, when air is blown out from the fan k at a relatively high wind speed through the air filter a, the clean air is passed through the downward blowing perforated plate d while remaining as it is. Since the air is more likely to be blown directly below, the amount of air blown from the downward blowing perforated plate d becomes larger than the amount of air blown from the side blow-off holes f.
Draft (feeling wind pressure directly on the skin) to workers
Therefore, it is difficult to adjust the opening and closing of the opening/closing plate h disposed outside the horizontal blowing hole f, which is done to weaken the amount of air blown from the downward blowing perforated plate d. There is a problem. Furthermore, when the conventional device is placed on the ceiling near the wall of a room, the direction and volume of air blown out from the horizontal outlet f are different between the wall and the center of the room. If the opening/closing adjustment of each opening/closing plate h placed near the wall is complicated and the room cannot be cleaned efficiently, or if the opening/closing plate h near the wall cannot be adjusted reliably, There is a problem in that it is not possible to prevent turbulence that occurs near the wall. The present invention solves these problems by weakening the blowing of air from the perforated plate for downward blowing of the rectangular box-shaped frame, without creating a feeling of draft, and by controlling the direction and volume of air from the side blowing holes. To provide an air blowing control device that can be easily adjusted and efficiently cleans a room without causing turbulence. (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a device that accommodates an air filter and is attached to a lower opening of a filter unit surrounding frame having a lower opening to control air blowing. In an air blowing control device having a rectangular box-like frame body, which is provided with a perforated plate for downward blowing at the bottom and horizontal blowing holes in the peripheral side wall, the air filter and the perforated plate for downward blowing of the rectangular box-like frame are provided between the air filter and the perforated plate for downward blowing of the rectangular box-like frame. A frame-shaped shutter is provided along the circumferential side wall of the rectangular box-like frame on the periphery of the perforated plate for intermediate blow-off to be arranged, and the perforated plate for intermediate blow-off can be freely moved up and down and tilted by a support member provided on the rectangular box-like frame. It is characterized by its support. (Function) Since the intermediate blowout perforated plate is placed between the air filter and the downward blowout perforated plate of the rectangular box-shaped frame, air from the air filter hits the intermediate blowout perforated plate and flows along the plate surface in the direction of the horizontal blowout holes. Since the air is divided into the air flowing through the middle blowing hole and the air passing through the middle blowing perforated plate, the wind speed of the air passing through the middle blowing perforated plate is weakened. In addition, a frame-shaped shutter is provided on the periphery of the intermediate perforated plate along the peripheral side wall of the rectangular box-shaped frame, and the perforated intermediate plate can be moved up and down and tilted by a support member provided on the rectangular box-shaped frame. Since the frame-shaped shutter can be moved up and down and tilted at the same time as the intermediate perforated air outlet plate, the frame-shaped shutter can be used to change the opening/closing degree of the horizontal outlet holes of the rectangular box-shaped frame from fully closed to fully open. Can be adjusted. (Example) The present invention will be explained with reference to the drawings. 1 to 4 show one embodiment of the present invention. In the drawing, 1 is a ceiling plate of a room to be used as a clean room, 2 is a periphery of an opening made in the ceiling plate 1, 3 is a filter unit surrounding frame that houses an air filter 4, 5 is a rectangular box-shaped frame, and 6 is a square frame. A perforated plate for downward blowing is provided with a large number of small blowing holes 7 formed by punching provided at the bottom of the box-like frame 5, and 8 defines a space above the perforated plate for downward blowing 6 of the rectangular box-like frame 5. A peripheral side wall surrounded by a rectangular shape, 9 a horizontal blow-off hole bored in the peripheral side wall 8 of the rectangular box-shaped frame 5, and 10 a fan connected to the inside of the filter unit surrounding frame 3, respectively. Then, a filter unit surrounding frame 3 supported by hanging rods from the attic is airtightly fixed to the opening periphery 2 of the ceiling plate 1, and a rectangular box-shaped frame 5 is further attached to the lower opening 11 of the filter unit surrounding frame 3. was installed. Then, by driving the fan 10, air is sent into the filter unit surrounding frame 3 at a desired speed and amount of air.
Dust is filtered by an air filter 4 made of a HEPA filter, and clean air is blown into the room through the small blow-off holes 7 of the downward blow-out perforated plate 6 located below the filter unit surrounding frame 3. Alternatively, the inside of the room can be made into a clean room by circulating air that is drawn out along with the air in the room through the porous portion of the side wall and returned to the air filter 4. Although any known means can be used to provide the rectangular box-shaped frame 5 in the lower opening 11 of the filter unit surrounding frame 3, in the illustrated embodiment, it was carried out as follows. That is, the perforated plate 6 for downward blowing is mounted and fixed on the support piece 12 provided at the lower end of the peripheral side wall 8 of the rectangular box-shaped frame 5 and extending horizontally inward, and in this state,
A mounting piece 13 provided at the upper end of the peripheral wall 8 and extending horizontally outward is arranged on the opening periphery 2 of the ceiling plate 1 together with a mounting member 14 having an L-shaped cross section fixed to the lower end peripheral surface of the filter unit surrounding frame 3. The rectangular box-shaped frame 5 is fixed to the lower opening 11 of the filter unit surrounding frame 3 in which the air filter 4 is housed by tightening with the mounting screws 16 through the gasket 15. In the drawings, reference numeral 17 indicates a sealing material applied around the mounting member 14 and the gasket 15. In operating the air blowing control device having such a configuration, the downward blowing perforated plate 6 is
When the air blows downward through the air, the workers directly under the air feel a draft and feel uncomfortable. In order to reduce this discomfort and further expand the blowing width to promote purification of the room, the air is also blown laterally from a large number of horizontal blowing holes 9 provided in the peripheral side wall 8 of the rectangular box-shaped frame 5. However, if the drive of the fan 10 is increased to further increase the air volume, the large air volume from the air filter 4 will be blown out directly below through the downward blowing perforated plate 6, with almost the same amount. This will make it feel like a draft. In order to solve this problem, the present invention provides an air filter between the air filter 4 in the filter unit surrounding frame 3 and the downward blowing perforated plate 6 of the rectangular box-shaped frame 5. A space 18 is left and an intermediate blowout perforated plate 19 is provided. The intermediate blowout perforated plate 19 has substantially the same shape as the downward blowout perforated plate 6,
A wall-like frame-shaped shutter is provided with a large number of small blow-off holes 20 punched in the plate, and extends vertically downward over the entire periphery of the plate along the peripheral side wall 8 of the rectangular box-shaped frame 5. 21 was established. Further, as shown in FIGS. 2 and 3, four supporting members 22 are used, and the lower part of each supporting member 22 is fixed near the four corners of the perforated plate 6 for downward blowing.
The upper part of each supporting member 22 is connected to the vicinity of the four corners of the perforated plate 19 for intermediate blowing, and the lower end of each support member 22 is exposed into the room from the perforated plate 6 for downward blowing, and the adjustment knobs 23a, 23b, 23c, 23
By rotating d left and right, the intermediate blowout perforated plate 19 is supported so as to be able to move up and down as well as tilted, and the lower blowout perforated plate 6 and the intermediate blowout perforated plate 1 are supported.
By changing the distance between the space 18 and the space 1
8 can be set at an appropriate desired interval.
Further, at the same time as the intermediate perforated plate 19, the frame-shaped shutter 21 provided on the periphery of the intermediate perforated plate 19 can be moved up and down and tilted to freely open and close the horizontal blow-off holes provided in the side wall 8 of the rectangular box-shaped frame 5. The direction and volume of air from the side blow-off holes 9 can be adjusted.
That is, the adjustment knob 23 of each support member 22 shown in FIG.
Among the a, 23b, 23c, and 23d, for example, the position of the intermediate blowout perforated plate 19 connected to the adjustment knobs 23a and 23d is raised to be close to the air filter 4 side, and the horizontal blowout hole 9 is closed by the frame-shaped shutter 21. Further, the position of the intermediate blowout perforated plate 19 connected to the adjustment knobs 23b and 23c is lowered to be close to the downward blowout perforated plate 6, and the frame-shaped shutter 2
If the side blow-off holes 9 are adjusted to open in step 1, the intermediate blow-off porous plate 19 will be in an inclined state where the right side is lowered as shown in FIG. Upon contact with the surface, air is blown out laterally within the room from the lateral blow-off holes 9 in the direction of arrow D in FIG. 2 along the inclination of the perforated plate 19.
The wind speed of the air that has passed through 0 is weakened and is blown out downward into the room from the small blowing holes 7 of the downward blowing porous plate 6. In the embodiment of the present invention, each adjustment knob 23a, 23b, 23c, 23d provided at the lower end of the support member 22
The relationship between the position of the intermediate blowout perforated plate 19 and the direction in which the wind speed increases in the downward and lateral directions of the air blowout control device is as shown in the following table.

[Table] Up, middle, down and arrows A, B,
C and D were as follows. Top: Position of the intermediate perforated plate raised toward the air filter, Middle: The intermediate perforated plate is positioned approximately midway between the air filter and the downward perforated plate, Bottom: The perforated intermediate plate is positioned as the perforated plate for downward use. Arrows A, B, C, D: Indicate the direction of the arrow symbol in FIG. 2. In the above embodiment, support members that support the intermediate perforated plate for vertical and tilting movements were provided near the four corners of the intermediate perforated plate, but the supporting members were provided at the center of the intermediate perforated plate. You can. (Effect of the invention) According to the present invention, the intermediate blowout perforated plate is disposed between the air filter and the downward blowout perforated plate of the rectangular box-shaped frame, so that the air from the air filter is transferred through the intermediate blowout holes. The air that hits the plate and flows along the plate surface toward the horizontal outlet can be divided into the air that passes through the intermediate perforated plate and the air that passes through the intermediate perforated plate.The wind speed of the air that has passed through the intermediate perforated plate is weakened and the air flows downward. The air is blown out from the perforated blowing plate, eliminating or reducing the discomfort that workers feel due to the draft caused by conventional devices, making the usability more pleasant, or increasing the driving force of the fan accordingly. In addition, a frame-shaped shutter is provided along the peripheral side wall of the rectangular box-shaped frame on the periphery of the intermediate perforated plate for blowing out, and the perforated plate for intermediate blowing can be moved up and down and tilted by a support member provided on the rectangular box-shaped frame. Since they are supported freely, the intermediate blowout perforated plate and the frame-shaped shutter can be moved up and down or tilted to the desired position, and can be supported in that state by the supporting member, so that the frame-shaped shutter can be attached to the peripheral side wall of the rectangular box-shaped frame. The degree of opening of the side blowout holes can be adjusted from fully closed to fully open, making it easy to adjust the direction and volume of air from the side blowholes, cleaning the room without causing turbulence. It has the effect of being able to perform it efficiently.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, and FIG. 1 is a partially cutaway side view of the device;
Fig. 2 is a bottom view of the device, Fig. 3 is a cutaway side view of the device, Fig. 4 is an explanatory diagram of the state when the support member is operated, and Fig. 5 is a partially cut away view of the conventional device. FIG. 3... Filter unit surrounding frame, 4... Air filter, 5... Rectangular box-shaped frame, 6... Perforated plate for downward blowing, 8... Circumferential wall, 9... Horizontal blowing hole, 11...
Lower opening, 19...Middle blowout perforated plate, 21...
...Frame-shaped shutter, 22...Supporting member.

Claims (1)

[Scope of utility model registration request] A device for controlling the blowing of air by being attached to a lower opening of a filter unit surrounding frame that accommodates an air filter and has a lower opening,
In an air blowing control device having a rectangular box-like frame body, which is equipped with a perforated plate for downward blowing at the bottom and horizontal blowing holes on the peripheral side wall, an intermediate portion is disposed between the air filter and the perforated plate for downward blowing of the rectangular box-like frame body. A frame-shaped shutter along the circumferential side wall of a rectangular box-like frame was provided at the periphery of the perforated blow-out plate, and the intermediate perforated blow-out plate was supported by a supporting member provided on the rectangular box-like frame so as to be able to move vertically and tilt freely. An air blowing control device characterized by: