JP2022080250A - Air-conditioning chamber and installation structure of air-conditioning chamber - Google Patents

Abstract

To provide an air-conditioning chamber which can be easily constructed.SOLUTION: An air-conditioning chamber 100 has: a chamber main body 10 which is cylindrically formed of a deformable flexible duct, and in which air-conditioned air flows; an opening part 40 which is formed while penetrating the chamber main body 10 in a radial direction; a tubular air-conditioning machine connecting pipe 20 attached to the chamber main body 10, and connected to the opening part 40; a cylindrical duct connecting pipe attached to the chamber main body 10, and connected to the opening part; and an attachment mechanism for attaching the air-conditioning machine connecting pipe 20 to the chamber main body 10. The attachment mechanism has a collar part 42 provided at an end part of the air-conditioning machine connecting pipe, and a washer 45 provided outside the chamber main body 10, and deforming an edge part 46 into a shape along the collar part 42 with the edge part 46 of the chamber main body 10 sandwiched between the collar part 42 and itself.SELECTED DRAWING: Figure 7

Description

The present invention relates to an air conditioning chamber and an air conditioning chamber installation structure.

Ducts are installed on the ceiling and walls of the facility for the purpose of air conditioning, ventilation, smoke exhaust, etc. It is desirable that the duct can be adapted to the shape of a ceiling, a wall, or the like, and as an example, a flexible duct that is curved, expandable, and lightweight is known.

Here, in order to distribute and supply the conditioned air supplied from the air conditioner toward the air outlets arranged at a plurality of places on the ceiling in the building, an conditioned chamber and a flexible duct connected to the chamber are provided. It is known to be used. As for the air-conditioning chamber, those having various shapes and structures have been conventionally developed, and in particular, a technique for installing a relatively large and heavy air-conditioning chamber on the ceiling is disclosed.

For example, in Patent Document 1, by making it possible to fit the connecting member of the air-conditioning outlet device into the box body installed behind the ceiling, there are no protrusions on the box body, which hinders the installation of the ceiling base. A chamber for mounting an air-conditioning outlet device that does not become a problem is disclosed. Further, in Patent Document 2, in a grid ceiling formed by arranging a plurality of T-bars in a grid pattern in order to construct a ceiling in a building, an air-conditioning chamber mounted on the T-bars and a T-bar are described. Disclosed is an air conditioning chamber installation structure comprising a plurality of fixtures for fixing the air conditioning chamber to the T-bar by engaging with.

Japanese Unexamined Patent Publication No. 11-337159 Japanese Unexamined Patent Publication No. 2017-9170

According to the conventionally known support structure of the air-conditioning chamber, for example, since the air-conditioning chamber is supported by using the hanging bolts suspended from the ceiling frame, a plurality of hanging bolts are used on the ceiling. It was necessary to place and fix it on the skeleton, and such work was time-consuming. Further, according to the air-conditioning chamber installation structure described in Patent Document 2, although a hanging bolt fixed to the building frame is not used, a system ceiling formed by arranging a plurality of T-bars is required, and the system ceiling is required for air-conditioning. There is still room for improvement in the technique for installing the chamber.

The air-conditioning chamber installed on the ceiling of the facility is required to be safe against falling. That is, heavy objects such as air conditioners installed on the ceiling of the facility need to be seismically isolated so that they will not fall due to an earthquake.

An object of the present disclosure is to provide an air conditioning chamber and an installation structure thereof that can be easily constructed.

The air-conditioning chamber of the present disclosure is an air-conditioning chamber used for mixing or distributing air-conditioning air supplied from an air-conditioning machine, or mixing outside air or indoor air taken into the air-conditioning machine, and is provided by a deformable flexible duct. A first opening and a first opening provided so as to connect the inside and the outside of the chamber body, which is formed in a cylindrical shape and through which conditioned air flows, so as to connect the inside and the outside of the chamber body. The two openings, the passage attached to the chamber body and connected to the first opening, and the conditioned air supplied from the air conditioner to flow into the inside of the chamber body, or taken into the air conditioner. A tubular air-conditioner connecting pipe that forms a passage for allowing outside air or indoor air to flow out of the chamber body, and air-conditioned air that is attached to the chamber body and connected to the second opening and is connected to the second opening. Cylindrical shape forming a passage through which the conditioned air is discharged from the chamber body for distribution, or a passage through which the outside air or indoor air is introduced into the chamber body for mixing the outside air or indoor air taken into the air conditioner. The duct connecting pipe and the mounting mechanism for attaching the air conditioner connecting pipe to the chamber body are provided, and the mounting mechanism is provided at the end of the air conditioner connecting pipe and inside the chamber body. An annular brim portion to be arranged and an edge portion provided outside the chamber body and surrounding the first opening of the chamber body together with the brim portion are interposed, and the edge portion is aligned with the brim portion. It has a pressing portion that deforms into a shape.

According to the present disclosure, it can be easily constructed.

It is a figure which shows the schematic structure of the air-conditioning chamber in 1st Embodiment. It is a figure which shows the cross section of a chamber body. It is a figure for demonstrating the installation process of the air conditioner connection port to the side surface part of a chamber main body. It is a figure which illustrates the arrangement of the air-conditioning chamber on the ceiling. It is a figure for demonstrating the chamber installation structure for air-conditioning in 2nd Embodiment. It is a figure which shows the band-shaped member and the rivet member in the 2nd Embodiment. (A) is a cross-sectional view showing a structure for attaching an air conditioner connection port to a chamber main body, and (B) is a cross-sectional view showing another example of a structure for attaching an air conditioner connection port to a chamber main body.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The configurations of the following embodiments are exemplary and the present disclosure is not limited to the configurations of the embodiments.

<First Embodiment>
The outline of the air conditioning chamber according to the first embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a schematic configuration of an air conditioning chamber according to the present embodiment. The air conditioning chamber 100 according to the present embodiment is used for mixing or distributing the air conditioning air supplied from the air conditioner, or for mixing the outside air or the indoor air taken into the air conditioner. The air conditioning chamber 100 includes a chamber body 10 composed of a flexible duct that can be curved and expanded, an air conditioner connecting pipe 20 connected to an air conditioner, and a duct connecting pipe 30 connected to a plurality of piping ducts. Be prepared.

The chamber body 10 is composed of a cylindrical flexible duct. This flexible duct can be configured in the same manner as a general flexible duct that is curved, stretchable, and lightweight, which is piped according to the shape of the ceiling or wall of the facility, but in the present embodiment, for example, the diameter thereof is 300 mm. The chamber body 10 is composed of a cylindrical flexible duct having a length of about 350 mm and a length of about 750 mm to 800 mm. The body 12 of the flexible duct is provided with a plurality of openings 10B, 40 as shown in FIG. 3B.

Here, the body portion 12 of the chamber body 10 may have a structure in which a glass wool material is sandwiched between resin films. FIG. 2 is a diagram showing a cross section of the chamber main body 10. In this embodiment, both ends 11 of the chamber body 10 are closed by the closing caps 11a. Specifically, both ends 11 of the chamber body 10 are covered with the closing caps 11a, and the contact portions between the chamber body 10 and the closing caps 11a are caulked with a silicon material, so that both ends 11 of the chamber body 10 are closed. ing. In the air-conditioning chamber 100 of the present embodiment, an example is shown in which both ends 11 of the chamber body 10 are closed by the closing caps 11a, but there is no intention of limiting this, and both ends 11 of the chamber body 10 are not limited to this. A duct connection pipe 30 connected to the pipe duct may be provided.

2 (b) is an enlarged view showing a part of the body portion 12 of the chamber body 10 shown in FIG. 2 (a) (which is represented by the region b). According to FIG. 2B, the glass wool plate is sandwiched between the polyethylene resin film and the polyethylene terephthalate resin film to form the body 12 of the chamber body 10. Further, in the polyethylene terephthalate resin film, the steel wire is sandwiched between the films. Here, for example, when an air conditioner is used for cooling each room in the facility and the cold air from the air conditioner is once supplied to the air conditioning chamber 100, the cold air in the air conditioning chamber 100 and the air conditioning chamber 100 are used. If the temperature difference from the air outside 100 is large, dew condensation may occur in the air conditioning chamber 100.

On the other hand, if the body portion 12 of the chamber body 10 has the heat insulating structure shown in FIG. 2B, the situation where dew condensation occurs in the air conditioning chamber 100 is suppressed as much as possible. Although FIG. 2 illustrates a structure in which a glass wool material is sandwiched between resin films, the resin film inside the chamber body 10 may be an aluminum film or a non-woven fabric, and the resin film outside the chamber body 10 may be used. May be an aluminum film.

Further, as shown in FIG. 3B, a plurality of openings 10B and 40 are provided in the body portion 12 of the chamber body 10. An air conditioner connecting pipe 20 is connected to one opening 40 (first opening) as shown in FIG. 1A, and a duct connecting pipe 30 is connected to each of the two openings 10B (second opening). Will be done. These openings 10B and 40 penetrate the chamber body 10 in the radial direction so as to connect the inside 10A of the chamber body 10 and the outside. Air-conditioned air flows through the inside 10A of the chamber body 10. The air conditioner connecting pipe 20 and the duct connecting pipe 30 are fixed to the chamber body 10, respectively. As shown in FIG. 3B, the openings 10B and 40 are provided at different positions in the circumferential direction of the chamber body 10. Therefore, as shown in FIG. 1B, the air conditioner connecting pipe 20 and the two duct connecting pipes 30 are provided at different positions in the circumferential direction of the chamber main body 10.

The air conditioner connecting pipe 20 is connected to one of the plurality of openings 10B, 40 penetrating the body 12 of the chamber body 10. The air conditioner connecting pipe 20 has a tubular shape, and a passage through which air conditioning air flows is formed inside the air conditioner connecting pipe 20. When the air-conditioning chamber 100 is used for mixing or distributing the conditioned air supplied from the conditioned air by connecting the conditioned air-conditioned pipe 20 to the conditioned air, the conditioned air supplied from the conditioned air is used. Will flow into the chamber body 10 via the air conditioner connecting pipe 20. When the air conditioner chamber 100 is used for mixing the outside air or indoor air taken into the air conditioner, the outside air or indoor air taken into the air conditioner flows out from the chamber body 10 through the air conditioner connecting pipe 20. It will be.

Here, the installation of the air conditioner connecting pipe 20 on the body portion 12 of the chamber main body 10 will be described with reference to FIG. FIG. 3 is a diagram for explaining a process of installing the air conditioner connecting pipe 20 on the body portion 12 of the chamber main body 10. In this installation step, as shown in FIG. 3A, first, an opening 40 is provided in the body portion 12 of the chamber body 10. The edge of the opening 40 provided in the body 12 of the chamber body 10 is covered with tape or the like so that the exposed glass wool material does not scatter.

Next, as shown in FIG. 3B, the air conditioner connecting pipe 20 is inserted into the opening 40 provided in the body portion 12 of the chamber body 10. The air conditioner connecting pipe 20 is made of metal, for example, aluminum, stainless steel, steel, or the like. The air conditioner connecting pipe 20 has four wall portions 41 as shown in FIG. 3 (d). The wall portions 41 are all rectangular, for example, rectangular, and the wall portions 41 are connected to each other to form an air conditioner connecting pipe 20. Further, as shown in FIG. 3B, a brim portion (handle portion) 42 protruding outward from the wall portion 41 is provided at the end portion of the wall portion 41. The brim portion 42 is connected to each of the wall portions 41.

Then, as shown in FIG. 3C, the reinforcing iron plate 21 is provided so as to surround the air conditioner connecting pipe 20. The reinforcing iron plate 21 is made of metal, for example, aluminum, stainless steel, steel, or the like. The reinforcing iron plate 21 is annular. The reinforcing iron plate 21 is provided outside the chamber body 10, and the brim 42 is provided from the opening 40 to the inside 10A of the chamber body 10.

Further, as shown in FIG. 7A, the reinforcing iron plate 21 and the brim portion 42 sandwich the edge portion 46 around the opening 40 in the body portion 12, and the reinforcing iron plate 21 is formed by the fixing element 43. The brim portion 42 is fixed. A plurality of fixing elements 43 are provided at predetermined intervals over the entire circumference of the annular reinforcing iron plate 21. As the fixing element 43, for example, a screw or a rivet is used. The rigidity of the chamber body 10 is lower than the rigidity of the reinforcing iron plate 21 and the brim portion 42, respectively. Therefore, in the process of fixing the reinforcing iron plate 21 and the brim portion 42 by the fixing element 43, the edge portion 46 of the body portion 12 is pressed against the brim portion 42, and the edge portion 46 is deformed following the shape of the brim portion 42. do. Therefore, regardless of the shape of the chamber body 10, the workability of the work of connecting and fixing the chamber body 10 and the air conditioner connecting pipe 20 is improved. That is, the construction of the air conditioning chamber becomes easy.

Further, the dimensional error, shape error, processing error and the like of the air conditioner connecting pipe 20 can be absorbed by the deformation of the chamber body 10. Therefore, the amount of gap at the connection point between the chamber main body 10 and the air conditioner connecting pipe 20 is reduced, and the sealing property is improved. Further, the shape and structure of the air conditioner connecting pipe 20 connecting the chamber main body 10 is not limited, and the applicable range of connecting the chamber main body 10 is expanded.

In a state where the reinforcing iron plate 21 and the brim portion 42 are fixed by the fixing element 43, a gap that may occur in the contact portion between the chamber body 10 and the air conditioner connecting pipe 20 and the attachment point of the fixing element 43 in the chamber body 10 There is a risk of gas leaking. Therefore, as shown in FIG. 3D, the gap between the chamber main body 10 and the air conditioner connecting pipe 20 and the portion where the fixing element 43 is fixed are covered by the sheet material 22 provided outside the chamber main body 10. Will be. At this time, a caulking treatment with a silicon material is also performed.

Further, as shown in FIG. 7A, an annular sealing material 44 is provided between the chamber main body 10 and the brim portion 42. The sealing material 44 is a silicon material or a synthetic rubber material. The sealing material 44 is provided inside the chamber body 10 so as to surround the opening 40. The fixing element 43 penetrates the sealing material 44 and is fixed.

FIG. 7B is a cross-sectional view showing another example of a structure in which the air conditioner connecting pipe 20 is attached to the chamber main body 10. In FIG. 7B, the above-mentioned reinforcing iron plate 21 is not provided. Rivets can be used as the plurality of fixing elements 43, and the rivets each have a ring-shaped washer 45. The washer 45 is a ring provided separately from the shaft of the fixing element 43. Therefore, in a state where a plurality of fixing elements 43 are attached, the body portion 12 and the sealing material 44 of the chamber main body 10 are sandwiched between the washer 45 and the brim portion 42. The edge portion 46 is pressed against the brim portion 42 by the washer 45, and the edge portion 46 is deformed into a shape along the brim portion 42.

Other configurations, actions and effects in FIG. 7 (B) are the same as the configurations, actions and effects of FIG. 7 (A). The fixing element 43 may be a rivet having a flange integrated with the shaft of the fixing element 43 instead of the washer. In this case, the edge portion 46 is sandwiched between the flange and the brim portion 42, and the edge portion 46 is pressed against the brim portion 42. Further, the fixing element 43 may be a screw having a washer or a screw member having a washer.

The duct connecting pipe 30 is provided in one or more of the plurality of openings provided in the body portion 12 of the chamber body 10. When the duct connecting pipe 30 is connected to a plurality of ducts and the air conditioning chamber 100 is used for mixing or distributing the air conditioning air supplied from the air conditioner, the air conditioning air in the chamber body 10 is used. Will flow out of the chamber body 10 via the duct connecting pipe 30.

Further, when the air conditioning chamber 100 is used for mixing the outside air or the indoor air taken into the air conditioner, the outside air or the indoor air flows into the chamber main body 10 through the duct connecting pipe 30. The duct connecting pipe 30 in the present embodiment is composed of, for example, a cylinder having a diameter of 170 mm to 230 mm. Further, in order to prevent gas in the chamber body 10 from leaking from a gap or the like that may occur in the contact portion between the chamber body 10 and the duct connecting pipe 30, caulking treatment is performed in the same manner as in the air conditioner connecting pipe 20. Will be done.

An example of arranging the air conditioning chamber 100 provided with the air conditioner connecting pipe 20 and the duct connecting pipe 30 on the ceiling will be described with reference to FIG. FIG. 4 is a diagram illustrating the arrangement of the air conditioning chamber 100 on the ceiling. In the example shown in FIG. 4, the air conditioner is connected to the air conditioning chamber 100a used for mixing the outside air and the indoor air, and the air conditioning chamber 100b for distributing the air conditioning air to each room. Then, a piping duct through which outside air flows is connected to one of the two duct connecting pipes 30 provided in the air conditioning chamber 100a, and a piping duct through which the indoor vacant space flows is connected to the other.

Then, these are mixed in the chamber main body 10, and the mixed air of the outside air and the indoor air is taken into the air conditioner through the air conditioner connecting pipe 20. Further, one of the two duct connecting pipes 30 provided in the air-conditioning chamber 100b is connected to a pipe duct through which air-conditioned air guided to a predetermined room in the facility flows, and the other is connected to another room in the facility. A piping duct through which the guided conditioned air flows is connected. Then, the conditioned air supplied from the air conditioner to the chamber main body 10 is distributed via the air conditioner connecting pipe 20.

Here, heavy objects such as air conditioners installed on the ceiling of the facility need to be seismically isolated and reinforced to be safe against falling, that is, to prevent them from falling due to an earthquake. Therefore, in the air-conditioning chamber of the present disclosure, the chamber body is composed of a flexible duct that is curved, expandable, and lightweight.

When the air conditioning chamber is rigidly connected directly to the air conditioner, the air conditioning chamber is integrated with the air conditioner and easily vibrates. If a box-shaped, relatively rigid chamber conventionally known as an air conditioning chamber is rigidly connected directly to an air conditioner, the air conditioning chamber is installed in order to ensure safety. When installing on the ceiling of the air conditioner, vibration isolation reinforcement is required together with the air conditioner, which requires time and effort for construction.

On the other hand, in the air-conditioning chamber of the present disclosure, as shown in FIG. 4, even if the air-conditioner connection pipe 20 provided in the air-conditioning chamber 100 is directly rigidly connected to the air conditioner, the chamber main body. Since the 10 is composed of a flexible duct that can be curved and expanded and contracted, the air conditioning chamber 100 is unlikely to vibrate integrally with the air conditioner. Also, the flexible duct is lightweight. Therefore, when the air-conditioning chamber 100 is installed on the ceiling of the facility, safety can be ensured without vibration isolation reinforcement, and the construction becomes easy. As described above, according to the present disclosure, it is possible to easily construct the air-conditioning chamber 100, and to provide an air-conditioning chamber having excellent safety.

<Second Embodiment>
The air-conditioning chamber installation structure in the second embodiment will be described with reference to FIG. FIG. 5 is a diagram for explaining an air conditioning chamber installation structure in the present embodiment. The air-conditioning chamber installation structure in the present embodiment is air-conditioned by fixing the air-conditioning chamber 100 of the first embodiment described above and the band-shaped member 200 provided with positioning holes at predetermined intervals in the longitudinal direction to the ceiling surface. A duct mounting member 300 for suspending the chamber 100 from the ceiling surface is provided.

The band-shaped member 200 has a band shape extending in the longitudinal direction, is suspended from the ceiling by being fixed to the duct mounting member 300, and is wound around the chamber body 10 of the air conditioning chamber 100. Further, the strip-shaped member 200 is made of resin and is formed so as to be easily cut by a cutting tool such as scissors in consideration of convenience at the time of hanging to the ceiling. Then, in the strip-shaped member 200, elliptical large holes and circular small holes penetrating in the thickness direction are alternately and repeatedly arranged in the longitudinal direction along the central axis.

The duct mounting member 300 is mounted on the ceiling, and a large hole on one end side of the band-shaped member 200 is fitted into a band rivet portion protruding in the vertical direction and snapped. Then, the strip-shaped member 200 is fixed to the duct mounting member 300, and the strip-shaped member 200 is suspended from the ceiling. Then, at each of both ends of the chamber body 10 of the air conditioning chamber 100, the band-shaped member 200 is wound around the chamber body 10, so that the air conditioning chamber 100 is suspended from the ceiling surface.

Specifically, the rivet member 400 is attached (inserted) to the band-shaped member 200 in a state where the band-shaped member 200 is wound around both ends of the chamber body 10 of the air-conditioning chamber 100. Here, FIG. 6 is a diagram showing a band-shaped member 200 and a rivet member 400 in the present embodiment. As shown in FIG. 6B, the rivet member 400 has a tubular first rivet portion 410 and a second rivet portion 420 having a diameter larger than that of the first rivet portion 410. The distance (interval) from the center of the first rivet portion 410 to the second rivet portion 420 is the distance from the small hole 210 adjacent to each other to the large hole 220 in the band-shaped member 200 shown in FIG. 6A. Matches with. As a result, the first rivet portion 410 functions as a guide for determining the mounting position when the rivet member 400 is mounted on the strip-shaped member 200.

Then, the first rivet portion 410 is inserted into the small hole 210 of the strip-shaped member 200 and the second band-shaped member 200 is wound around both ends of the chamber body 10 of the air-conditioning chamber 100. The rivet member 400 is attached to the strip-shaped member 200 by inserting the rivet portion 420 of the above into the large hole 220. Specifically, when the second rivet portion 420 is pushed into the large hole 220, the large hole 220 is elastically deformed. After the second rivet portion 420 penetrates (passes through) the large hole 220, the large hole 220 returns to its original shape by the restoring force.

As a result, the rivet member 400 is attached to the strip-shaped member 200 in a state where the strip-shaped member 200 and the bottom surface of the second rivet portion 420 are in contact with each other. Then, the band-shaped member 200 is maintained in a state of being wound around both ends of the chamber body 10 of the air conditioning chamber 100 by the rivet member 400.

Even if the air-conditioning chamber of the present disclosure is installed in this way, the air-conditioning chamber 100 can be installed relatively easily while ensuring safety without vibration isolation reinforcement. According to the present disclosure, it is possible to provide an air-conditioning chamber installation structure that can be easily constructed and has excellent safety.

The fixing element 43, the washer 45, the flange of the fixing element 43, and the reinforcing iron plate 21 correspond to the mounting mechanism and the pressing portion.

10 ... Chamber body 20 ... Air conditioner connection pipe 21 ... Reinforcing iron plate 30 ... Duct connection pipe 43 ... Fixed element 45 ... Washer 100 ... Air conditioning chamber

According to the present disclosure, the pressing portion and the brim portion sandwich the edge portion of the chamber body and are fixed by the fixing element. The chamber body is sandwiched between resin films to form a deformable flexible duct.Since the rigidity of the chamber body is lower than the rigidity of the brim, the edge is pressed against the brim, and the edge of the chamber body is , Deforms according to the shape of the brim. Therefore, regardless of the shape of the chamber body, the workability of the work of connecting and fixing the chamber body and the air conditioner connecting pipe is improved. That is, the construction of the air conditioning chamber becomes easy. Further, by deforming the edge portion of the chamber body, dimensional error, shape error, processing error and the like of the air conditioner connecting pipe can be absorbed by the deformation of the chamber body. Therefore, the shape and structure of the air conditioner connecting pipe connecting the chamber body is not limited, and the applicable range of connecting the chamber body is expanded.

Claims (2)

An air conditioning chamber used for mixing or distributing air conditioning air supplied from an air conditioner, or for mixing outside air or indoor air taken into the air conditioner.
The chamber body, which is formed in a cylindrical shape by a deformable flexible duct and in which conditioned air flows inside,
A first opening and a second opening provided through the chamber body in the radial direction so as to connect the inside and the outside of the chamber body,
A passage attached to the chamber body and connected to the first opening and allowing the conditioned air supplied from the air conditioner to flow into the inside of the chamber body, or outside air or indoor air taken into the air conditioner. A cylindrical air conditioner connecting pipe forming a passage to flow out from the chamber body,
Outside air that is attached to the chamber body and connected to the second opening, and that allows the conditioned air to flow out of the chamber body to distribute the conditioned air from the air conditioner, or is taken into the air conditioner. Alternatively, a tubular duct connecting pipe forming a passage for allowing the outside air or the indoor air to flow into the chamber body in order to mix the indoor air.
A mounting mechanism for attaching the air conditioner connecting pipe to the chamber body,
Have,
The mounting mechanism is
An annular brim provided at the end of the air conditioner connecting pipe and arranged inside the chamber body, and
A pressing portion provided outside the chamber body and sandwiching an edge portion surrounding the first opening of the chamber body together with the brim portion to deform the edge portion into a shape along the brim portion.
Has an air conditioning chamber. The air-conditioning chamber according to claim 1 and
A duct mounting member that suspends the air conditioning chamber from the ceiling surface by fixing a band-shaped member provided with positioning holes at predetermined intervals in the longitudinal direction to the ceiling surface.
A chamber installation structure for air conditioning.

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