Horizontal laminar flow air conditioning mechanism and horizontal laminar flow air conditioning chamber

Abstract

In a horizontal laminar flow type air conditioning mechanism having a suction portion on the ceiling, a horizontal laminar flow type air current is maintained up to the vicinity of the side wall on the suction portion side. 【Solution means】The horizontal laminar flow type air conditioning mechanism 100 of the present invention includes a plurality of blowout holes dispersedly arranged on one side wall 11 of a pair of opposing side walls of the air conditioning target room 10, and a suction portion 22 provided on the ceiling plate 13 adjacent to the indoor 18 side of the other side wall 12 of the pair of opposing side walls. The suction portion 22 has a suction recess provided on the ceiling plate 13 so as to extend in the width direction of the other side wall 12, a suction surface constituting a part of the inner surface of the suction recess, and a suction port opening on the suction surface. The suction surface faces the other side wall 12 and is inclined downward.

Description

Technical Field

[0001] The present invention relates to an air conditioning mechanism that performs air conditioning such as dust removal and sterilization by horizontal laminar air circulation. In particular, the present invention relates to an air conditioning mechanism that forms a horizontal laminar air flow in a room by sucking air ejected as a horizontal laminar flow from a side wall of a room to be air-conditioned from the ceiling, and an air-conditioned room equipped with the same.

Background Art

[0002] Conventionally, in a horizontal laminar air conditioning mechanism for dust removal and sterilization in a clean room, an operating room, a clean room, etc., horizontal laminar air is blown out from one of a pair of opposing side walls in a room to be air-conditioned, and air is sucked from a ceiling plate on the other side wall side to form a horizontal laminar air flow in the room (see, for example, Patent Document 1 and Patent Document 2).

[0003] This type of horizontal laminar air conditioning mechanism that sucks air from the ceiling plate is effective when it is not possible to secure a space for a return duct in the room because there is no need to provide a return duct that returns air from the room to the ceiling space on the other side wall.

[0004] For example, Patent Document 1 discloses a clean room that forms a horizontal laminar flow by sucking air discharged from the entire surface of one side wall into the ceiling on the other side wall side and two suction ports provided below it. In the clean room of Patent Document 1, a discharge port is also provided in the ceiling, and air is discharged from the discharge port in the ceiling and sucked from the suction port at the lower part of the other side wall so that it can be switched to a turbulent air flow.

[0005] Further, FIG. 27 of Patent Document 2 discloses a ventilation system in which air is blown out from the entire surface of one side wall and exhaust is performed from a groove having a rectangular cross section provided in the ceiling of the other side wall. In the ventilation system of Patent Document 2, a room intake duct for supplying air to the room and a room exhaust duct for discharging air from the room are provided so as to extend in parallel to one wall and the other wall, and a plurality of rooms can be connected in this direction.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, in the clean room of Patent Document 1, since suction ports are also provided at the lower part of the other side wall, a space for the exhaust duct is required on the back side of the other side wall, resulting in a problem that the room becomes narrow. Further, in the ventilation system of Patent Document 2, since the room exhaust duct sucks only the central portion in the width direction on the other side wall of the exhaust groove, there is a problem that the horizontal laminar flow collapses near the other side wall. The present invention has been made in view of the above problems, and an object thereof is to provide a horizontal laminar flow type air conditioning mechanism that does not require a return duct on the back side of the other side wall facing the side wall that blows out air, and can sufficiently form a horizontal laminar flow up to the vicinity of the other side wall, and a horizontal laminar flow type air conditioning room.

Means for Solving the Problems

[0008] The invention made to solve the above problems is a horizontal laminar flow type air conditioning mechanism having a plurality of blowout holes dispersedly arranged on one of a pair of opposing side walls of an air conditioning target room, and a suction portion provided on a ceiling plate adjacent to the indoor side of the other of the pair of opposing side walls, wherein the suction portion includes a suction recess provided on the ceiling plate so as to extend in the width direction of the other side wall, a suction surface constituting a part of the inner surface of the suction recess, and a suction port opening in the suction surface, and the suction surface faces the other side wall and is inclined downward, being more spaced apart from the other side wall toward the bottom characterized in that it is like this. Here, the "width direction of the other side wall" shall refer to the direction parallel and horizontal to the other side wall.

[0009] In the horizontal laminar flow air conditioning mechanism of the present invention, since the suction surface provided in the suction recess is thus opposed to the other side wall and inclined downward, air is sucked along the other side wall. By doing so, compared with the case where the suction surface is horizontal and facing downward, the air discharged as a horizontal laminar flow from one side wall can be made to be sucked into the suction portion more slowly, so that the horizontal laminar flow discharged from one side wall can be maintained up to the vicinity of the other side wall side. Further, compared with the case where the suction surface provided in the suction recess is parallel to the other side wall and opposed to the other side wall, generation of turbulent flow in the suction recess can be suppressed.

[0010] The one side wall has one or a plurality of blowing surfaces provided with blowing holes dispersed over the entire surface, the suction ports are provided with one or a plurality arranged side by side in the width direction, and the width direction occupied by the one or a plurality of suction ports in the width direction all Preferably, the range occupied by the one or a plurality of blowing surfaces is included. By making the range in which all the suction ports exist in the width direction of the other side wall wider than the range in the same width direction of all the blowing surfaces, compared with the case where the range occupied by the suction ports is narrower than the range occupied by the blowing surfaces in the same width direction of the one side wall, it is possible to suppress the horizontal laminar flow discharged from the blowing surface of the one side wall from converging in the same width direction, so that it is possible to suppress the horizontal laminar flow from collapsing.

[0011] The horizontal laminar flow air conditioning mechanism of the present invention preferably includes a cover board covering the suction port, and the cover board includes a plurality of suction slits extending in the width direction. By doing so, air can be more effectively sucked along the other side wall, so that it is possible to suppress the horizontal laminar flow discharged from one wall from collapsing.

[0012] The present invention includes the air conditioning target room and a horizontal laminar flow air conditioning room provided with the above-described horizontal laminar flow air conditioning mechanism for air conditioning the air conditioning target room.

Effects of the Invention

[0013] As described above, according to the horizontal laminar flow air conditioning mechanism of the present invention, a horizontal laminar flow can be formed up to the vicinity of the other side wall.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. However, the present invention is not limited to the following embodiments, and appropriate changes can be made without departing from the gist of the present invention.

[0016] (First Embodiment) Figures 1 to 6 show a horizontal laminar flow type air conditioning chamber 100 according to a first embodiment of the present invention. As shown in FIG. 1, the horizontal laminar flow type air conditioning chamber 100 includes an air conditioning target chamber 10 and a horizontal laminar flow type air conditioning mechanism 20 that forms a horizontal laminar airflow LF in the internal space of the air conditioning target chamber 10 to perform dust removal and sterilization in the air conditioning target chamber 10. The air conditioning target chamber 10 is, for example, a clean room, an operating room, a sterile room, or the like. In the example of FIG. 3, it is a hospital room equipped with a bed B.

[0017] (Air conditioning target chamber) The air conditioning target chamber 10 mainly includes at least a pair of parallel side walls 11 and 12 facing each other in the direction of the horizontal laminar airflow LF, and a ceiling plate 13. In the illustrated example, the air conditioning target chamber comprising a rectangular parallelepiped room, and includes a ceiling space 14 provided behind the ceiling plate, a pair of parallel side walls 15 and 16 facing each other in a direction perpendicular to the facing direction of the pair of side walls 11 and 12, and a floor plate 17. In the ceiling space 14, a partition plate 141 parallel to the other side wall 12 and a blow-through portion 143 formed of a rectangular parallelepiped space partitioned by a pair of partition plates 142 and 142 perpendicular to the other side wall 12 are provided. In the air conditioning target chamber 10, a horizontal laminar airflow LF is formed by the horizontal laminar flow type air conditioning mechanism 20 in a direction from one side wall 11 toward the other side wall 12.

[0018] (Horizontal laminar flow type air conditioning mechanism) As shown in FIG. 1, the horizontal laminar flow type air conditioning mechanism 20 includes two blowing units 21 and 21 attached to one side wall 11, a suction portion 22 provided adjacent to the other side wall 12 on the ceiling plate, and a fan filter unit 23 provided in the ceiling space 14 to return the air sucked from the suction portion 22 to the blowing unit 21. However, the number of blowing units 21 may be one or three or more.

[0019] As shown in FIG. 1, the blowing unit 21 is made of a metal box body such as iron, aluminum, or stainless steel in the shape of a hollow flat rectangular parallelepiped, and has a height that penetrates the floor plate 17 of the air conditioning target chamber 10 and reaches into the ceiling space 14 through the ceiling plate.

[0020] As shown in Fig. 4, on the surface 21b of the blowing unit 21 facing the interior 18 (the space between the ceiling plate 13 and the floor plate 17), a rectangular opening 21c is provided as indicated by the dashed line in Fig. 4. A blowing surface portion 211 composed of a plate-like member provided with a large number of blowing holes 21a is screwed to the surface 21b so as to close this opening 21c. The back surface of the blowing surface portion 211 is closed by a thin filter 212 as shown in Fig. 3. The air blown out from the blowing unit 21 is blown out through the filter 212, the rectangular opening 21c, and the blowing holes 21a of the blowing surface portion 211.

[0021] In the duct connection portion 21e (see Fig. 1) located in the ceiling-plate-back space 14 of the blowing unit 21, an inlet 21f is provided which is connected to the fan filter unit 23 in the ceiling-plate-back space 14 and through which the air from the fan filter unit 23 flows in.

[0022] The suction portion 22 has a suction recess 221 provided on the ceiling plate so as to extend in the width direction of the other side wall 12, a suction surface 222 constituting a part of the inner surface of the suction recess 221, and a suction port 222a opening to the suction surface 222.

[0023] As shown in Fig. 1, the suction recess 221 is formed by accommodating a suction unit 26, which will be described later, in the through portion 143 of the ceiling-plate-back space 14, and the suction surface 222 is constituted by one surface of the suction unit 26. The suction recess 221 is formed by an opening 221a (see Fig. 6) that is rectangular in bottom view, the other side wall 12, partition plates 142, 142 provided at both horizontal ends along the other side wall 12, and the rectangular suction surface 222. In the illustrated example, it consists of a triangular prism-shaped space with a right-angled triangle cross-section. Note that although the other side wall 12 on the front side of the paper in Figs. 1 and 2 does not appear in the figure due to transparency, it closes the front side of the paper of the suction recess 221, that is, it should be noted that the suction recess 221 only opens downward.

[0024] The suction unit 26 is formed as a hollow box made of metal such as iron, aluminum, or stainless steel. In the illustrated example, the suction unit 26 is a triangular prism-shaped box with a right-angled triangular cross section. The surface including the hypotenuse of the right-angled triangle in the cross section faces the other side wall 12 and forms a downwardly inclined suction surface 222. The suction surface 222 includes suction ports 222a, 222a consisting of two rectangular openings, each occupying approximately half the area of the suction surface 222, a frame plate portion 221b shaped like a horizontally placed Japanese character "日" (sun) that covers the periphery and gaps of the suction ports 222a, 222a, and cover boards 222c, 222c that close the suction ports 222a, 222a, respectively. The cover board 222c has multiple suction slits 222d,..., extending parallel to the width direction of the other side wall 12 and aligned perpendicular to the width direction. A pre-filter (not shown) that can be replaced by opening and closing the cover board 222c is provided inside the cover board 222c. However, the number of suction ports 222a may be one or three or more, and may be different from the number of the blowout unit 21. Multiple suction ports 222a may be arranged vertically.

[0025] 4, the horizontal width d2 of the suction port 222a is set to be equal to or greater than the horizontal width d1 of the blowing surface portion 211, and the area of the blowing surface portion 211 in the width direction of the other side wall 12 is contained within the area occupied by the suction port 222a. This makes it possible to prevent the air flow from concentrating in the width direction compared to when the width d2 of the suction port 222a is smaller than the width d1 of the blowing surface portion 211 or when the area occupied by the blowing surface portion 211 does not fit within the area occupied by the suction port 222a in the width direction, and therefore it is possible to maintain the horizontal laminar airflow LF up to the vicinity of the other side wall 12.

[0026] Also, as shown in FIG. 4, the distance D2 between the outer edges of the two suction ports 222a is set to be equal to or greater than the distance D1 between the outer ends of the two blowing surfaces 211, 211a. By doing so, compared with the case where the distance D2 between the outer edges of the two suction ports 222a, 222a is smaller than the distance D1 between the outer edges of the two blowing surfaces 211, 211a, it is possible to suppress the gathering of the air flow in the width direction of the other side wall 12. Therefore, the horizontal laminar air flow LF can be maintained up to the vicinity of the other side wall 12.

[0027] The suction unit 26 has suction ducts 24, 24 from the fan filter unit 23 connected thereto from one side wall side, and the air sucked from the suction ports 222a is sucked into the fan filter unit 23 via the suction ducts 24, 24.

[0028] As shown in FIG. 3, the fan filter unit 23 is disposed in the ceiling board back space 14 so as to be placed on the ceiling board 13, and includes a fan unit 231 connected to the suction unit 26 via the suction duct 24, and a filter unit 232 connected to the blowing units 21, 21 via the supply ducts 25, 25. A fan is provided inside the fan unit 231, and a HEPA filter is provided inside the filter unit 232.

[0029] (Function and Effect) When performing horizontal laminar flow air conditioning in the horizontal laminar flow air conditioning chamber 100 according to the first embodiment, the power of the horizontal laminar flow air conditioning mechanism 20 is turned on, and switches, liquid crystal panels, etc. are appropriately operated to drive the fan unit 231 of the fan filter unit 23. When the fan unit 231 is driven, the air sucked from the suction port 222a is dust-removed and sterilized by the filter unit 232 of the fan filter unit 23 through the suction duct 24 and the suction unit 26, and is blown into the room 18 from a large number of blowout holes 21a,... through the supply duct 25 and the blowout unit 21. The air blown out from the large number of blowout holes 21a, 21a forms a horizontal laminar flow air current LF and travels from one side wall 11 toward the other side wall 12. After colliding with the other side wall 12 or approaching near the other side wall 12, it is sucked by the negative pressure from the suction part 22, rises along the other side wall 12, and is sucked from the suction port 222a. In the horizontal laminar flow air conditioning chamber 100 according to the first embodiment, as described above, since the suction surface 222 provided in the suction recess 221 faces the other side wall 12 and is inclined downward, air is sucked along the other side wall. By doing so, compared with the case where the suction surface 222 is horizontal and faces downward, the air discharged as the horizontal laminar flow air current LF from the one side wall 11 can be sucked by the suction part 22 more slowly, so that the horizontal laminar flow air current LF discharged from the one side wall can be maintained near the other side wall 12.

[0030] Next, other embodiments of the present invention will be described. However, in the embodiments after the second embodiment, members common to the first embodiment are denoted by the same reference numerals and the description thereof is omitted. (Second Embodiment) FIG. 7 shows a horizontal laminar flow air conditioning chamber 200 according to the second embodiment of the present invention. In the second embodiment, the width d2 of the suction port 222A is smaller than the width d1 of the blowout surface part 211. The distance D2 between the outer ends of the two suction ports 222A, 222A is smaller than the distance D1 between the outer edges of the two blowout surface parts 211, 211.

[0031] (Third Embodiment) FIG. 8 shows a horizontal laminar flow type air conditioning chamber 300 according to the third embodiment of the present invention. In the horizontal laminar flow type air conditioning chamber 300, the ceiling board back space 14 does not include a blow-through portion 143 formed by a partition board 141 or a partition board 142, and the suction recess 33 of the suction portion 32 is formed by providing a rectangular opening 33a in the ceiling board 13, a frame body 34 composed of a pair of side walls 34a, 34a and a top wall 34b, the other side wall 12, and the suction surface 222 of the suction unit 26. In the present embodiment, the suction recess 33 is formed of a quadrangular prism-shaped space having a trapezoidal cross section. In the present embodiment, in this way, by covering the opening 33a provided in the ceiling board with the frame body 34, the suction portion 32 can be formed at low cost. The frame body 34 can be formed of a decorative board or the like.

[0032] As described above, the horizontal laminar flow type air conditioning mechanism and the horizontal laminar flow type air conditioning chamber of the present invention are not limited to the above-described embodiments. For example, the suction slit of the cover board does not have to be horizontal in the width direction of the other side wall 12.

Explanation of Reference Numerals

[0033] 100, 200, 300 Horizontal laminar flow type air conditioning chamber 10 Air conditioning target chamber 11 One side wall 12 The other side wall 13 Ceiling board 18 Inside the room 20 Horizontal laminar flow type air conditioning mechanism 21a Outlet hole 21b Outlet surface 22, 32 Suction portion 221, 33 Suction recess 222 Suction surface 222a, 222A Suction port 222c Cover board 222d Suction slit

Claims

1. A horizontal laminar flow air conditioning mechanism having a plurality of blowout holes dispersedly arranged on one of a pair of opposing side walls of an air-conditioned room, and a suction part provided on a ceiling board adjacent to the indoor side of the other of the pair of opposing side walls, wherein the suction part has a suction recess provided on the ceiling board so as to extend in the width direction of the other side wall, a suction surface constituting a part of the inner surface of the suction recess, and a suction port opening to the suction surface, and the suction surface faces the other side wall and is inclined downward so as to be spaced apart from the other side wall toward the lower side. The horizontal laminar flow air conditioning mechanism is characterized by this.

2. The one side wall has one or a plurality of blowout surface parts provided with blowout holes dispersedly arranged on the entire surface; the suction ports are provided with one or a plurality arranged side by side in the width direction; and the entire range in the width direction occupied by the one or a plurality of blowout surface parts is included in the range occupied by the one or a plurality of suction ports in the width direction. The horizontal laminar flow air conditioning mechanism according to Claim 1.

3. The horizontal laminar flow air conditioning mechanism according to Claim 1 or Claim 2, further comprising a cover board covering the suction port, the cover board having a plurality of suction slits extending in the width direction.

4. The air-conditioned room, and the horizontal laminar flow air conditioning mechanism according to Claim 1 or Claim 2 are provided. The horizontal laminar flow air conditioning room is characterized by this.

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