JP2015169341A - Blowout plate and clean air blowout device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disperse air from a blowout plate for blowing out air, in a normal direction of the surface of the blowout plate and in a radial direction around the blowout plate.SOLUTION: A blowout plate comprises a first blowout group including a plurality of first slits as groups each having a first blowout slit extending in parallel with an edge part of the blowout plate, and a blowout guide for inducing an air blowing-out direction to a direction inclined in respect to a normal direction of the surface of the blowout plate; a second blowout group including a plurality of second slits as groups each having a second blowout slit extending in a direction inclined in respect to the rectangular-shaped edge part, and a blowout guide for inducing the air blowing-out direction to a direction inclined in respect to the normal direction of the blowout plate; and a third blowout group including a plurality of circular blowout holes in which the air blowing-out direction is the normal direction of the surface of the blowout plate. The first blowout group and the second blowout group are arranged to enclose around the center of the blowout plate.

Description

  The present invention relates to a blowing plate and a clean air blowing device for blowing out clean air into a room.

  Conventionally, clean rooms are provided in semiconductor factories, pharmaceutical factories, food factories, medical facilities, and the like. In the clean room, there is provided a clean air blowing device that sucks air in the clean room and blows out the clean air supplied through the air conditioner and the air filter from an opening provided in the ceiling of the clean room.

As the structure of the blowout port of the clean air blowout device, for example, the blowout surface is a mountain-shaped structure protruding to the room side, and is provided on a large number of air blowout holes provided on the protruding top and the inclined surface of the mountain-shaped structure A structure having a large number of air blowing holes is known (Patent Document 1; FIG. 1).
Further, there is known a blowout plate in which a blowout surface has a planar structure and extends on the blowout surface in parallel to the outline of the blowout surface, and is provided with slits with blades for diffusing air outward (Patent Document 2).
Furthermore, a slit with a blade that extends in parallel to the outer line (edge) of the blower plate and diffuses air outwardly, and the slits with the blade plate are distributed in the center of the blower plate, and are normal to the surface of the blower plate There is also known a blowout plate provided with a group of holes or openings for blowing out air (Patent Document 3).

JP 2006-297359 A JP-A-1-203840 JP 2002-147832 A

  However, the mountain-shaped clean air blowing device disclosed in Patent Document 1 described above measures the airflow, the airflow is strong in the vertical direction (vertically downward), hardly spreads radially, and the air is radiated over the entire room. It turns out that it cannot be diffused. In addition, since the air outlet has a mountain structure and protrudes toward the room side, the room cannot be used effectively.

  Moreover, in the blowout plate provided with the bladed slits disclosed in Patent Document 2 described above, the airflow in the normal direction (vertical downward direction) of the surface of the blowout plate is caused by the structure in which the airflow is blown out radially by the slits with the bladed plate. weak. As a result, the airflow flowing in the radial direction causes a vortex in the normal direction (vertically downward) of the blowing plate.

  In the blowout plate disclosed in Patent Document 3, there is no slit with blades for supplying air to the diagonal line of the rectangular surface of the blowout plate, and there is no air flow on this diagonal line. And air cannot be diffused radially around the blowing plate. In addition, since the group of holes or openings in the central portion and the slit region with blades around the center are manufactured by separate molds and then joined by welding or the like, there is a problem that manufacturing time is increased and processing costs are increased.

  Then, an object of this invention is to provide the blowing plate and clean air blowing apparatus which can diffuse air to the normal line direction of the surface of a blowing plate, and a radial direction around a blowing plate.

One embodiment of the present invention is a rectangular discharge plate that blows out clean air into a room. The blowing plate is
A first blow slit provided on the blow side surface of the blow plate and extending parallel to the edge of the rectangular shape, and a direction in which the air blow direction is inclined with respect to the normal direction of the surface of the blow plate A first blowing group having a plurality of first slit portions provided as a group, the guiding guide provided corresponding to the first blowing slit,
A second blowing slit provided on the blowing side surface of the blowing plate and extending in a direction inclined with respect to the rectangular edge; and an air blowing direction inclined with respect to a normal direction of the blowing plate A second blowing group provided with a plurality of second slit portions having a blowing guide provided corresponding to the second blowing slit, which guides in the direction,
A third blowing group provided on a blowing side surface of the blowing plate and provided with a plurality of blowing holes in which a blowing direction of air is a normal direction of the surface of the blowing plate.
The first blowing group and the second blowing group are provided so as to surround the center of the blowing plate.

  A plurality of the first blowing groups are provided at point-symmetrical positions with respect to the center of the blowing plate, and a plurality of the second blowing groups are provided at point-symmetrical positions with respect to the center of the blowing plate. It is preferable.

  It is preferable that the first blowing group and the second blowing group are alternately provided so as to surround the center of the blowing plate.

  Moreover, it is preferable that the said 3rd blowing group is enclosed by the said 1st blowing group and the said 2nd blowing group.

  The blowout guide in at least a part of the first slit part of the first blowout group and at least a part of the second slit part of the second blowout group is the blowout hole of the third blowout group. It is preferable that it is a guide with a hole provided with the same shape of the through hole.

The blowout guide in the first slit part of at least a part of the first blowing group and the second slit part of at least a part of the second blowing group is a holeless guide in which no through hole is provided. And
Between the arrangement | positioning area | region of the 1st slit part and the 2nd slit part which have the said holeless guide in the said 1st blowing group and the said 2nd blowing group, and the arrangement | positioning area | region of the said 3rd blowing group It is preferable that there is an arrangement region of the first slit portion and the second slit portion having the guide with holes.

Another aspect of the present invention is a clean air blowing device. The clean air blowing device
A casing connected to the duct through which air passes;
An air filter unit provided in the casing for cleaning the supplied air;
The blowout plate is provided at an opening of the casing and blows out air cleaned by the air filter into a room.

  According to the above-mentioned blowing plate and clean air blowing device, air can be diffused in the normal direction of the surface of the blowing plate and in the radial direction around the blowing plate.

It is construction sectional drawing of the clean air blowing apparatus of this embodiment. (A) is the figure seen from the air blowing side of the blowing board of 1st Embodiment, (b) is a figure of the one part cut surface of the blowing board of 1st Embodiment. It is the figure seen from the air blowing side of the blowing board which is 2nd Embodiment. It is the figure seen from the air blowing side of the blowing board which is 3rd Embodiment. It is the figure seen from the blowing side of the blowing board which is 4th Embodiment. (A) And (b) is a figure explaining a blowing board dimension and a measurement position. (A) And (b) is a figure which shows an example of the measurement result of the airflow of 1st Embodiment. (A) And (b) is a figure which shows the measurement result of the airflow of 4th Embodiment. (A) And (b) is a figure which shows the measurement result of the airflow of a prior art example.

  Hereinafter, the blowing plate and the clean air blowing device of the present invention will be described in detail.

(Clean air blowing device)
FIG. 1 is a construction cross-sectional view of a clean air blowing device (hereinafter simply referred to as a device) 10 of the present embodiment. The apparatus 10 mainly includes a casing 12, an air filter unit 18, and a blowout plate 40. The apparatus 10 is provided on the ceiling of a so-called clean room, and diffuses air by blowing out clean air radially into the clean room with a substantially constant flow velocity.

The casing 12 has an inlet 12a for introducing air and an opening 12b for discharging the introduced air. The introduction port 12 a is connected to a duct 14 connected to an air conditioner (or blower) (not shown), and introduces air output from the air conditioner (or blower) into the casing 12, and the air passes through the casing 12.
The air filter unit 18 includes a medium performance filter and a high performance filter (HEPA filter, ULPA filter) in order to clean the supplied air, that is, to filter particulates in the air.
The blow-out plate 40 is provided in the opening 12b of the casing 12, and a blow-off slit for blowing the clean air as an air flow having a substantially constant flow velocity in the normal direction and the radial direction of the blow-side surface, and the blow plate A large number of blowing holes for blowing air in the normal direction of the surface on the blowing side of 40 are provided. This point will be described later.

  The air filter unit 18 is fixed to the casing 12 by a stud bolt or the like (not shown) in a filter mounting frame 16 fixed in the casing 12 and is built in the casing 12. A folded portion 20 formed by folding outward is provided at a peripheral end portion on the opening 12b side of the casing 12, and the folded portion 20 is fixed to the ceiling C by pressure bonding. Thereby, the device 110 is fixed to the ceiling C. A blow-out plate 40 is fixed to the end of the folded portion 20 with a bolt or the like (not shown).

Hereinafter, the blowing plate 40 of 1st Embodiment-4th Embodiment is demonstrated. Each embodiment has the following contents. That is, the blowing plate 40 has a plurality of first blowing groups, a plurality of second blowing groups, and a third blowing group.
The first blowing group is provided on the blowing side surface of the rectangular blowing plate 40, the first blowing slit extending in parallel with the rectangular edge, and the blowing direction of the air to the surface of the blowing plate 40 It is a group of the 1st slit part which has the blowing guide provided corresponding to the 1st blowing slit guided to the direction inclined with respect to the line direction.
The second blowing group is provided on the blowing side surface of the blowing plate 40 and extends in a direction inclined with respect to the edge of the rectangular shape, and the air blowing direction is a normal line of the blowing plate 40. It is a group of the 2nd slit part which has the blowing guide provided corresponding to the 2nd blowing slit guided to the direction inclined with respect to the direction.
The third blowing group is a group provided on the blowing side surface of the blowing plate 40 and provided with a plurality of blowing holes whose air blowing direction is the normal direction of the surface of the blowing plate.
A plurality of first blowing groups and second blowing groups are provided so as to surround the center of the blowing plate 40.
As described above, since a plurality of the first blowing groups and the second blowing groups are provided so as to surround the center of the blowing plate 40, air is supplied in the normal direction of the surface of the blowing plate 40, and the blowing plate. Can diffuse radially around.

(First embodiment)
Fig.2 (a) is the figure seen from the blowing side of the blowing plate 40 of 1st Embodiment, FIG.2 (b) is a figure of the one part cut surface of the blowing plate 40 of 1st Embodiment. It is.
The blowout plate 40 is a rectangular plate that blows out clean air into a room such as a clean room, and a plurality of first blowout groups 42, a plurality of second blowout groups 44, A third blowing group 48 is provided.
In FIG. 2 (a), for the understanding of the embodiment, the size of the blowout hole 49 is set to the first blowout slit 43 of the first blowout group 42 and the second blowout slit 45 of the second blowout group 44. It is exaggerated and large compared to the size of.

  The first blowing group 42 is a group of first slit portions having a first blowing slit 43 and a blowing guide 46. The first blowing slit 43 is provided on the blowing side surface of the blowing plate 40 and extends parallel to the edge of the rectangular plate. The blowing guide 46 is provided corresponding to each first blowing slit 43 that guides the blowing direction of air in a direction inclined with respect to the normal direction of the surface of the blowing plate 40.

The second blowing group 44 is a group of second slit portions having a second blowing slit 45 and a blowing guide 46. The second blowing slit 45 is provided on the blowing side surface of the blowing plate 40 and extends in a direction (greater than 0 degree and smaller than 90 degrees) inclined with respect to the rectangular edge of the blowing plate 40. The blowing guide 46 is provided corresponding to each second blowing slit 45 that guides the blowing direction of air in a direction inclined with respect to the normal direction of the blowing plate 40. The inclination direction of the blowing guide 46 is set so that the blowing direction of the air is directed outward in the radial direction when viewed from the center O of the blowing plate 40. The blowing guide 46 is made of the same material as the surface of the blowing plate 40 that blows air.
In the blowing plate 40, a plurality of first blowing groups 42 and second blowing groups 44 are provided so as to surround the center of the blowing plate 40. In the form shown in FIG. 2 (a), a first blowing group 42 is provided in the central region of each edge of the four sides of the rectangular shape, and the second blowing is provided in end regions near both ends of the respective edges. A group 44 is provided.

  The third blowing group 48 is a group of holes provided on the blowing side surface of the blowing plate 40 and provided with a plurality of blowing holes 49 whose air blowing direction is a normal direction of the surface of the blowing plate 40. . The shape of the blowout hole 49 is not particularly limited, but as shown in FIG. 2A, a circular shape is preferable in that air is diffused radially. The blowing plate 40 is configured using, for example, a punching metal having a blowing hole 49. The third blowing group 48 is arranged so as to be surrounded by the first blowing group 42 and the second blowing group 44. A plurality of first blowing groups 42 and second blowing groups 44 are provided to surround the center O of the blowing plate 40. With such a configuration of the blowing plate 40, air can be diffused in the normal direction of the surface of the blowing plate and in the radial direction around the blowing plate.

Each of the first blowing group 42 and the second blowing group 44 is provided at a point-symmetrical position with respect to the center O of the blowing plate 40 (the centroid of the blowing side surface of the blowing plate 40). From the point of making the air flow uniform in the radial direction.
Further, the first blowing group 42 and the second blowing group 44 are alternately provided so as to surround the center O of the blowing plate 40, so that air is diffused in the radial direction around the center O. This is preferable.
The third blowing group 48 is surrounded by the first blowing group 42 and the second blowing group 44 to radiate air in the normal direction of the surface of the blowing plate 40 and around the blowing plate 40. It is preferable in that it diffuses in the direction.
Further, the blowout guide 46 in at least a part of the first slit portion of the first blowout group 42 and at least a part of the second slit portion of the second blowout group 44 is blown out of the third blowout group 48. A guide with a hole provided with a through hole having the same shape as the hole 49 is preferable. Through the through hole of the guide with holes, air can be blown out from the slit in the normal direction of the surface of the blowing plate 40 and guided to the inclination of the blowing guide 46 to blow out air around the blowing plate 40 in the radial direction.

  Further, the blowing guide 46 in at least a part of the first slit part of the first blowing group 42 and the at least part of the second slit part of the second blowing group 44 is a hole in which no through hole is provided. There may be no guide. At this time, the arrangement region of the first slit portion and the second slit portion having the holeless guide in the first blowing group 42 and the second blowing group 44, and the arrangement region of the third blowing group 48, Between these, it is preferable that there is an arrangement region of the first slit portion and the second slit portion having a guide with a hole. Thereby, in the central region including the center O of the blowing plate 40, air blows out in the normal direction of the surface of the blowing plate 40, and around the central region, the first slit portion and the second slit having the guide with a hole. The air diffuses in the radial direction around the blow-out plate and the normal direction of the surface of the blow-out plate, and further, the air can diffuse in the radial direction around the blow-out plate 40 by the holeless guide. .

  In addition, the first blowing slits 43 of the first blowing group 42 have the same size, and the plurality of blowing slits 45 of the second blowing group 44 have the same size. In the blowing group 42, it is preferable from the point which makes the quantity of the air blown out in the 2nd blowing group 44 uniform. The size of the blowing slit is a dimension in a direction orthogonal to the extending direction of the blowing slit and the extending direction.

  In the form shown in FIG. 2A, the shape of the blowout slit 43 of the first blowout group 42 and the second blowout slit 45 of the second blowout group 44 are such that the sides facing from the center O of the blowout plate 40 to the outside. Although it is a trapezoidal shape having a long side, it may be a rectangular shape, and the shape of the blowing slit is not particularly limited as long as it has an extending direction.

  In the present embodiment, the inclination angle φ (see FIG. 2) with respect to the edge of the first blowing group 42 in the extending direction of the first blowing slit 43 is 45 degrees, but the inclination angle φ is 30 to 60 degrees. A constant value within the range is preferably from the point of forming a uniform air flow in the direction of the corners of the two rectangular edges from the center O of the rectangular shape, and the inclination angle φ is set to 42 to 48. More preferably. Thus, in 1st Embodiment, since the 1st slit part and the 2nd slit part are provided in multiple on the surface by the side of the blowing plate 40, air is made into the normal line direction of the surface of a blowing plate And can diffuse radially around the blowing plate. Moreover, it is preferable that standing angle (theta) (refer FIG. 3) of the blowing guide 46 is 30-60 degrees. Further, the blowing guide 46 is a plate that extends from the edge extending in the extending direction of the blowing slit, inclining with respect to the normal direction of the blowing plate 40 in the direction opposite to the blowing direction of the clean air, When the opening of the blowout slit 46 is viewed from the front, the plate forming the blowout guide 46 covers the opening by 60 to 80% of the area of the opening. It is preferable at the point which blows off in the direction inclined with respect to the normal line direction of the blowing board 40. FIG.

(Second Embodiment)
FIG. 3 is a view as seen from the air blowing side of the blowing plate 40 according to the second embodiment. Also in the embodiment shown in FIG. 3, the first blowing group 42 having the first blowing slit 43, the second blowing group 44 having the second blowing slit 45, and the third blowing having the blowing hole 49. Group 48 is included. Further, a plurality of first blowing groups 42 and second blowing groups 44 are provided so as to surround the center O of the blowing plate 40. The third blowing group 48 is surrounded by the first blowing group 42 and the second blowing group 44. In addition, since the thing of the same structure as 1st Embodiment is described using the same code | symbol, the description of the structure and effect | action is abbreviate | omitted. In the second embodiment, the ratio of the area occupied by the third blowing group 48 and the area occupied by the first blowing group 42 to the first embodiment shown in FIG. The ratio of the area occupied by the blowout group 48 and the area occupied by the second blowout group 42 is different. In 2nd Embodiment, the area which the 3rd blowing group 48 occupies is large compared with 1st Embodiment shown to Fig.2 (a). In this case, the ratio of the amount of air blown from the first blowing group 42 and the second blowing group 44 and the ratio of the amount of air blown from the third blowing group 48 is different from the embodiment shown in FIG. This is the same as the above-described first embodiment in that the air flow that does not cause a winding flow can be formed radially. That is, the second embodiment can diffuse air in the normal direction of the surface of the blowout plate and in the radial direction around the blowout plate.

Also in the second embodiment, each of the first blowing group 42 and the second blowing group 44 is point-symmetric with respect to the center O of the blowing plate 40 (the centroid of the blowing side surface of the blowing plate 40). Is preferably provided.
Moreover, it is preferable that the 1st blowing group 42 and the 2nd blowing group 44 are alternately provided so that the circumference | surroundings of the center O of the blowing board 40 may be enclosed.
The third blowing group 48 is preferably surrounded by the first blowing group 42 and the second blowing group 44.
Further, the blowout guide 46 in at least a part of the first slit portion of the first blowout group 42 and at least a part of the second slit portion of the second blowout group 44 is blown out of the third blowout group 48. A guide with a hole provided with a through hole having the same shape as the hole 49 is preferable.
Further, the blowing guide 46 in at least a part of the first slit part of the first blowing group 42 and the at least part of the second slit part of the second blowing group 44 is a hole in which no through hole is provided. In this case, the arrangement area of the first slit portion and the second slit portion having the holeless guide in the first blowing group 42 and the second blowing group 44, and the third blowing group Between the 48 arrangement regions, there is preferably an arrangement region of the first slit portion and the second slit portion having a guide with a hole.

(Third embodiment)
FIG. 4 is a view as seen from the air blowing side of the blowing plate 40 according to the third embodiment. In 3rd Embodiment shown in FIG. 4, the 1st blowing group 42 which has the 1st blowing slit 43, the 2nd blowing group 44 which has the 2nd blowing slit 45, and the 3rd which has the blowing hole 49 are shown. The blowout group 48 is provided.

  The first blowing group 42 and the second blowing group 44 are provided so as to surround the center O of the blowing plate 40. Specifically, the first blowout group 42 and the second blowout group 44 are provided with a first blowout slit 43 and a second blowout slit 45 surrounding the center O along a four-row arc around the center O. It has been. The first blowing group 42 is a group in which four rows of blowing slits 42 extending in parallel with one edge of the blowing plate 40 (upper edge in the example shown in FIG. 4) are arranged in a direction perpendicular to the edge. is there. The 2nd blowing group 43 is provided along the circular arc so that the 1st blowing group 42 may be pinched | interposed. That is, the second blowing group 44 is arranged in an arc shape so as to surround the center O of the blowing plate 40. The third blowing group 48 is surrounded by the first blowing group 42 and the second blowing group 44. A third blowout group 48 is provided in a circular region surrounded by the first blowout slit 43 and the second blowout slit 45 of the first blowout group 42 and the second blowout group 44. In addition, since the thing of the same structure as 1st Embodiment is described using the same code | symbol, the description of the structure and effect | action is abbreviate | omitted. Also in the third embodiment, as in the first embodiment, air can be diffused in the normal direction of the surface of the blowing plate and in the radial direction around the blowing plate.

Also in the third embodiment, it is preferable that the first blowing group 42 and the second blowing group 44 are alternately provided so as to surround the center O of the blowing plate 40.
The third blowing group 48 is preferably surrounded by the first blowing group 42 and the second blowing group 44.
Further, the blowout guide 46 in at least a part of the first slit portion of the first blowout group 42 and at least a part of the second slit portion of the second blowout group 44 is blown out of the third blowout group 48. A guide with a hole provided with a through hole having the same shape as the hole 49 is preferable.
Further, the blowing guide 46 in at least a part of the first slit part of the first blowing group 42 and the at least part of the second slit part of the second blowing group 44 is a hole in which no through hole is provided. In this case, the arrangement area of the first slit portion and the second slit portion having the holeless guide in the first blowing group 42 and the second blowing group 44, and the third blowing group Between the 48 arrangement regions, there is preferably an arrangement region of the first slit portion and the second slit portion having a guide with a hole.

(Fourth embodiment)
FIG. 5 is a view as seen from the air blowing side of the blowing plate 40 of the fourth embodiment. The blowing plate 40 has a first blowing group 42, a second blowing group 44, and a third blowing group 48.

The structure of the 1st blowing group 42, the 2nd blowing group 44, and the 3rd blowing group 48 is the 1st blowing group 42, the 2nd blowing group 44, and the 3rd blowing group 48 of 1st Embodiment. Therefore, the description of the configuration and operation is omitted. The first blowing group 42 and the second blowing group 44 are provided so as to surround the center O of the blowing plate 40. In 4th Embodiment, the 3rd blowing group 48 is not enclosed by the 1st blowing group 42 and the 2nd blowing group 44, and the blowing hole 48 which comprises the 3rd blowing group 48 is a blowing board. The entire surface on the outlet side of 40 is provided at regular intervals. Further, in the fourth embodiment, the blowing guides 46 in all the first slit portions of the first blowing group 42 and in all the second slit portions of the second blowing group 44 are the third blowing group 48. This is a guide with a hole provided with a through hole having the same shape as that of the blowout hole 49. A blowout hole 49 is provided on the blowout side surface around the first slit portion and the second slit portion.
Since it is such a form, the air which blows off from a blowing slit faces the normal line direction of the surface of a blowing plate, and the direction inclined with respect to the surface of a blowing plate. Moreover, since the 1st blowing group 42 and the 2nd blowing group 44 are arrange | positioned radially from the center O, it diffuses air to the normal line direction of the surface of a blowing plate, and a radial direction around a blowing plate. be able to.

  The blowing plate 40 of 4th Embodiment can be produced from the punching metal provided with many through-holes, for example. In this case, each through hole of the punching metal becomes the blowout hole 49 and becomes a guide through hole. The first blowout slit 43 and the second blowout slit 45, and the blowout guide portion 46 can be produced by bending a piece formed by cutting a punching metal.

Also in the fourth embodiment, each of the first blowing group 42 and the second blowing group 44 is point-symmetric with respect to the center O of the blowing plate 40 (the centroid of the blowing side surface of the blowing plate 40). It is preferable to be provided at the position.
Moreover, it is preferable that the 1st blowing group 42 and the 2nd blowing group 44 are alternately provided so that the circumference | surroundings of the center O of the blowing board 40 may be enclosed.

  In addition, although the blowing guide 46 in all the 1st slit parts of the 1st blowing group 42 and all the 2nd slit parts of the 2nd blowing group 44 is a guide with a hole, it is the 1st blowing group. The blowout guide 46 in at least a part of the first slit part 42 and at least a part of the second slit part of the second blowout group 44 may be a guide with a hole. In this case, the blowing guide 46 in at least a part of the first slit part of the first blowing group 42 and the at least part of the second slit part of the second blowing group 44 is not provided with a through hole. A guide without holes is preferred. At this time, the arrangement area of the first slit portion and the second slit portion having the holeless guide in the first blowing group 42 and the second blowing group 44 is the first slit portion having the holed guide. And it is preferable that it exists in the position far from the center O compared with the arrangement | positioning area | region of a 2nd slit part at the point which diffuses air to the surroundings of the blowing board 40 to a radial direction.

(Experimental example)
In order to confirm the effect of the blowing plate 40 of this embodiment, the wind speed distribution of the blown air was measured with the following method using the clean air blowing apparatus 10 shown in FIG.

FIGS. 6A and 6B are diagrams for explaining the dimensions and measurement positions of the blowout plate. The blowing plate was square and L1 = L2 = 760 mm. As shown in FIG. 6A, five positions (M1 to M10) other than the center O in the X direction and the Y direction from the center O are defined as measurement positions, and the normal direction downward direction (high) of the surface of the blowing plate (Direction), positions at distances L3 to L7 from the surface of the blowing plate were determined as measurement positions.
Position M1 is 100 mm, position M2 is 200 mm, position M3 is 350 mm, position M4 is 450 mm, position M5 is 550 mm, position M6 is 100 mm, position M7 is 200 mm, position M8 is 350 mm, position M9 is 400 mm, position M10 is 550 mm, The positions are separated from the center O along the X direction. Further, the distance L3 from the surface of the blowing plate is 100 mm, the distance L4 is 200 mm, the distance L5 is 300 mm, the distance L6 is 600 mm, and the distance L9 is 900 mm.
At positions separated from the blowing plate by distances L3 to L7, that is, a total of five positions, six positions in the X direction (including the center O) and five positions in the Y direction were measured. Therefore, the wind speed was measured at 55 locations (= 5 × (6 + 5)) on one blowing plate. A hot-wire anemometer was used to measure the wind speed at each position.
The sizes of the blow slit and the blow hole were adjusted so that the ratio of the opening area of the blow slit and the blow hole of the blow plate to the entire area of the blow plate on the blow side was substantially uniform.

  The measured wind speed is larger than the wind speed of 0.5 (m / sec), greater than the wind speed of 0.1 (m / sec) and less than 0.5 (m / sec), and less than 3 (wind speed of 0.1 (m / sec)). Classified by stage. FIGS. 7A and 7B are diagrams showing an example of wind speed measurement results of the first embodiment shown in FIG. FIGS. 8A and 8B are views showing measurement results of the wind speed of the fourth embodiment, and FIGS. 9A and 9B are conventional examples (the blowout plate having the mountain structure of Patent Document 1). It is a figure which shows the measurement result of the wind speed of the form in which the circular blowing hole was provided in the top part and the inclined surface. Here, regarding the display of each measurement position in FIGS. 7A, 7B, 8A, 8B and 9A, 9B, the wind speed shown in FIG. The legend is common. Thus, in the first embodiment shown in FIG. 2 and the fourth embodiment shown in FIG. 5, air is diffused in the normal direction of the surface of the blowing plate and in the radial direction around the blowing plate as compared with the conventional example. I understand that

  The results of such wind speed were summarized by the following method. That is, the blowout evaluation in the normal direction of the surface of the blowout plate was performed in four stages of levels A to D. When the wind speed is greater than 0.5 (m / sec) at all positions at distances L3 to L7 from the surface of the blowing plate at the position of the center O in the X direction and at positions M1 and M2, all positions are set. When the wind speed is 0.1 (m / sec) or more and there are some positions larger than 0.5 (m / sec), the level is B, and the wind speed is 0.1 (m / sec) at all positions. The case where it was larger than 0.5 (m / sec) or less was designated as level C, and the case where there was a position where the wind speed was 0.1 (m / sec) or less was designated as level D.

In addition, the blowout in the X direction and the Y direction (radial direction) was evaluated in three stages of levels A, B, and D. Specifically, when the position is greater than the wind speed 0.5 (m / sec) at the positions M3 and M8 at distances L3 to L7 away from the surface of the blowing plate, the level A is set. When there is no position greater than (m / sec) and there is a position greater than wind speed 0.1 (m / sec) and less than 0.5 (m / sec), level B is set, and wind speed 0.1 at all positions. The case where it was less than (m / sec) was designated as level D.
The overall evaluation is level A in the case of level A in all evaluations in the normal direction, X direction, and Y direction, and there is no level D in the evaluation in the normal direction, X direction, and Y direction, and there is at least one level B. The case where there was a level B and there was no level D in the evaluation in the normal direction, the X direction and the Y direction and there was at least one level C was set as level C.
Table 1 below shows the form of the blowout plate and its evaluation results.

  Thus, the first embodiment, the third embodiment, and the fourth embodiment in which the first blowing group 42 and the second blowing group 44 are provided so as to surround the center O of the blowing plate 40 are as follows. In contrast to the conventional example, it can be seen that air can be diffused in the normal direction of the surface of the blowing plate and in the radial direction around the blowing plate.

  As mentioned above, although the blowing plate and the clean air blowing apparatus of this invention were demonstrated in detail, this invention is not limited to the said embodiment, You may make various improvement and change in the range which does not deviate from the main point of this invention. Of course.

DESCRIPTION OF SYMBOLS 10 Clean air blowing apparatus 12 Casing 12a Inlet 12b Opening 14 Duct 16 Filter mounting frame 18 Air filter unit 20 Folding part 40 Blowing plate 42 1st blowing group 43 1st blowing slit 44 2nd blowing group 45 2nd Air outlet slit 46 Air outlet guide 48 Third air outlet group 49 Air outlet hole

Claims (7)

A rectangular blowout plate that blows clean air into the room,
A first blow slit provided on the blow side surface of the blow plate and extending parallel to the edge of the rectangular shape, and a direction in which the air blow direction is inclined with respect to the normal direction of the surface of the blow plate A first blowing group having a plurality of first slit portions provided as a group, the guiding guide provided corresponding to the first blowing slit,
A second blowing slit provided on the blowing side surface of the blowing plate and extending in a direction inclined with respect to the rectangular edge; and an air blowing direction inclined with respect to a normal direction of the blowing plate A second blowing group provided with a plurality of second slit portions having a blowing guide provided corresponding to the second blowing slit, which guides in the direction,
A third blowing group provided on a blowing side surface of the blowing plate, and a plurality of blowing holes provided with a plurality of blowing holes whose air blowing direction is a normal direction of the surface of the blowing plate;
The blowout plate, wherein the first blowout group and the second blowout group are provided so as to surround a center of the blowout plate.   A plurality of the first blowing groups are provided at point-symmetrical positions with respect to the center of the blowing plate, and a plurality of the second blowing groups are provided at point-symmetrical positions with respect to the center of the blowing plate. The blowing plate according to claim 1.   The blowing plate according to claim 1 or 2, wherein the first blowing group and the second blowing group are alternately provided so as to surround a center of the blowing plate. The blowing plate according to any one of claims 1 to 3, wherein the third blowing group is surrounded by the first blowing group and the second blowing group.   The blowout guide in at least a part of the first slit part of the first blowout group and at least a part of the second slit part of the second blowout group is the blowout hole of the third blowout group. The blowout plate according to any one of claims 1 to 4, which is a guide with a hole provided with a through hole having the same shape. The blowout guide in the first slit part of at least a part of the first blowing group and the second slit part of at least a part of the second blowing group is a holeless guide in which no through hole is provided. And
Between the arrangement | positioning area | region of the 1st slit part and the 2nd slit part which have the said holeless guide in the said 1st blowing group and the said 2nd blowing group, and the arrangement | positioning area | region of the said 3rd blowing group The blowout plate according to claim 5, wherein there is an arrangement region of the first slit portion and the second slit portion having the holed guide. A casing connected to the duct through which air passes;
An air filter unit provided in the casing for cleaning the supplied air;
The clean air blowing device according to claim 1, further comprising: a blow-out plate according to claim 1, which is provided at an opening of the casing and blows out air cleaned by the air filter into a room.

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