WO2011013743A1

WO2011013743A1 - Underfloor air-conditioning duct structure

Info

Publication number: WO2011013743A1
Application number: PCT/JP2010/062779
Authority: WO
Inventors: 文明中村; 覚令小山; 剛牧
Original assignee: 三洋工業株式会社
Priority date: 2009-07-31
Filing date: 2010-07-29
Publication date: 2011-02-03
Also published as: JPWO2011013743A1; JP5010036B2; KR101715430B1; KR20120041230A

Abstract

Regarding a duct structure used for underfloor air conditioning, an underfloor air-conditioning duct structure wherein the cost of a duct is reduced and the structure of a duct is simplified and wherein a duct can be easily constructed, is provided. In an air-conditioning structure which circulates an air-conditioning air discharged from a cooling and heating air conditioner within a duct (3) disposed in an underfloor space, the duct (3) is comprised of a heat insulating material (22) placed on the upper portion of a floor slab (1), a flat substrate (25), a pair of side covers (6, 6 (7, 7)) which are composed of an upper flange (24) and a lower flange (26) obtained by bending both ends of the substrate in the same direction and which are opposite to each other on the heat insulating material (22) and lie on the lower flange (26) side, positioning members (10, 11) which are placed between the lower flanges (26, 26) and which are secured to the floor slab (1) by an anchor tool (50), and top panels (8, 9) which are placed between the upper flanges (24, 24) of both sided covers and fixed by a fixing tool.

Description

Underfloor air conditioning duct structure

The present invention relates to a duct structure used for underfloor air conditioning.

Conventionally, the underfloor air-conditioning duct shown in FIG. 5 is known, which is a cylindrical duct 81 disposed above the floor slab 80 using the underfloor space. The duct 81 has a hole at a predetermined position and is attached with a branch device 82, and a branch pipe 84 is attached to the duct 81 and connected to the jet box 86. The conditioned air flowing through the duct 81 is blown to the back surface of the floor board 88 by the jet box 86 to perform underfloor air conditioning. In many cases, the underfloor air conditioning equipment includes duct work. In this case, adjustment of the work period is required between the air conditioner and the floor contractor.

Further, the following ducts are disclosed in relation to the duct structure.
In the duct joining structure described in Patent Document 1, the edge of the panel is inserted into each of the slits on both sides of the corner part for joining, and then the both sides of the corner part and the edge of the panel are joined by spot welding. The duct is manufactured by joining, and this makes it possible to manufacture the duct at a low work cost without thermal distortion and at a low cost.

The duct described in Patent Document 2 is connected to each other between the four duct plates via a connecting portion that can be rotated 90 degrees, and the duct plates can be folded, so that the duct transportation efficiency is good, and The construction on site is easy.

The duct described in Patent Document 3 includes a ceiling plate that constitutes a ceiling, and a bowl-like body in which a lower end on the opening side is fitted into a rail that is arranged in a pair on the upper surface of the ceiling plate. In addition, a cylindrical space is formed by a ceiling plate and a bowl-shaped body to form a duct, which makes it easy to construct and can be performed simultaneously with the ceiling.

JP 2002-31397 A JP2003-114044 JP-A-5-1843

However, for the above-mentioned underfloor air-conditioning duct, duct work in a narrow space under the floor has little space and special parts, and when installing a jet box, drilling in the duct for installing a branch pipe Since work and complicated connection work are required, it is necessary for a special air conditioner to perform the construction, and there is a problem that the parts of the duct are bulky and expensive during transportation.

Moreover, the joint structure of the duct of patent document 1 joins a corner part and a panel by spot-welding, and manufactures a duct, and also about the construction in the field, the connection operation between parts and parts become special. For this reason, it is expected that there will be a problem that it will depend on a specialized air conditioner and the cost will increase.

The duct of Patent Document 2 is a structure in which the corners of four duct plates are connected in a special shape, and it is expected that construction work such as coupling of ducts in the field is complicated, and the degree of freedom is low. There is a problem.
The duct of Patent Document 3 is formed by a bowl-shaped body having a U-shaped cross section disposed on the top of the ceiling plate. Therefore, the capacity of the duct is changed and the upper part of the duct is processed (attaching a jet nozzle, etc.). Is difficult and has a low degree of freedom.

The present invention has been made to solve the above-mentioned problems, and it is intended to reduce the cost of the duct and simplify the structure, and provide an underfloor air-conditioning duct structure that is easy to construct and excellent in workability. Objective.

In order to solve the above technical problem, the underfloor air-conditioning duct structure according to the present invention distributes the conditioned air from the air conditioning equipment for cooling and heating into the duct 3 arranged in the underfloor space as shown in FIG. In the air-conditioning structure in which this conditioned air is blown to the back surface of the floor plate or blown into the room through the air outlet, the duct 3 includes a heat insulating material 22 laid on the upper portion of the floor slab 1, a flat substrate portion 25, and this substrate portion. A pair of sides arranged on the upper side of the heat insulating material 22 with the lower flange portion 26 facing downward, with a shape comprising an upper flange portion 24 and a lower flange portion 26 bent at the same end in the same direction. Covers 6, 6 (7, 7) and the

lower flange portions

26, 26
It is placed between the

positioning members

10 and 11 that are placed between them and fastened to the floor slab 1 with the anchor metal fittings 50, and the

upper flange portions

24 and 24 of the both side covers, and fastened with fastening tools. And

plates

8 and 9.

In the underfloor air-conditioning duct structure according to the present invention, the

bottom plates

110 and 111 are arranged between the upper portions of the

lower flange portions

26 and 26 of the side covers 6 and 6 (7 and 7), and the positioning is performed on the upper portion of the bottom plate. The

members

10 and 11 are arranged.

The underfloor air-conditioning duct structure according to the present invention has a structure in which holes are formed in the

top plates

8 and 9, and a jet nozzle 18 for blowing conditioned air to the back surface of the floor plate is attached to the holes.

Moreover, the underfloor air-conditioning duct structure according to the present invention has one end of the introduction duct 120 attached to the hole formed in the 6, 6 (7, 7) substrate portion of the side cover, and is attached to the other end of the introduction duct. The upper end portion of the jet nozzle 118 is fixed to the back surface of the floor plate, and the conditioned air is blown to the back surface of the floor plate by the jet nozzle 118.

According to the underfloor air-conditioning duct structure according to the present invention, a pair of side covers, which have a shape having a heat insulating material, a base plate portion, and an upper and lower flange portion, and are disposed facing each other with the lower flange portion facing down, Adopting a structure with a positioning member placed between the flanges and fixed to the floor slab with anchor fittings, and a top plate placed between the upper flanges of both side covers, the structure of the duct is simple and assembled Because it is easy and specialized technology is not necessary, it is possible to unify the construction process by assembling and constructing both the floor part and the duct only by the floor construction company at the site, and the construction period can be adjusted smoothly, In addition, the layout of the underfloor air-conditioning space, the arrangement form of the ducts, and the air blowing capacity can be adjusted and changed on site, so that a duct suitable for the site can be provided and dedicated parts can be reduced. There is an effect that width cost savings can be achieved.

According to the underfloor air conditioning duct structure according to the present invention, the bottom plate is disposed between the upper portions of the lower flange portions of both side covers, and the positioning member is disposed on the upper portion of the bottom plate. This has the effect of improving durability and airtightness.

According to the underfloor air-conditioning duct structure according to the present invention, since the structure in which the hole is formed in the top plate and the jet nozzle is attached is adopted, the jet nozzle is easily attached to the duct, and the workability is excellent. The nozzle can be moved up and down, and has the effect of being able to handle low floor floors with low floor pockets.

In addition, according to the underfloor air-conditioning duct structure according to the present invention, since the jet nozzle fixed to the back surface of the floor plate through the introduction duct from the substrate portion of the side cover is employed, the configuration in which the conditioned air is blown to the back surface of the floor plate is adopted. There is an effect that the mounting position can be selected relatively freely and the degree of freedom in design is increased.

It is a fragmentary perspective explanatory view of the duct structure concerning a first embodiment of the present invention. It is a fragmentary perspective view of the duct structure concerning an embodiment. It is a three-dimensional view of the duct structure according to the embodiment. It is a top view of the duct structure concerning an embodiment. It is a figure which shows the duct structure which concerns on a prior art example. It is a fragmentary perspective explanatory view of the duct structure concerning a second embodiment. It is a partial side view of the duct structure concerning a 2nd embodiment.

Embodiments of an underfloor air-conditioning duct structure according to the present invention will be described below with reference to the drawings.
First, the underfloor air-conditioning duct structure according to the first embodiment will be described.
1 and 2 are partial perspective views of an underfloor air-conditioning duct structure disposed on the floor slab 1. Here, the duct 3 forming the underfloor air-conditioning duct structure includes a main duct 2 and a plurality of branch ducts 4 branched from the main duct 2 at a predetermined interval.

The main duct 2 has a pair of side covers 6, 6, a top plate 8, a positioning member 10, an adjustment member 12, a reinforcing bracket 14, and the like that are disposed facing each other. The branch duct 4 also has a pair of side covers 7, 7, a top plate 9, a positioning member 11, and an adjustment member 13 that are arranged facing each other, and further has a nozzle fixing plate 16.
The nozzle fixing plate 16 forms part of the top plate 9, and a jet nozzle 18 is attached to the nozzle fixing plate 16. Further, a connection fitting 20 having an L-shaped cross section is attached to the corner portion of the connecting portion between the main duct 2 and the branch duct 4.

Thus, in the duct 3, the side covers 6 and 7 and the

top plates

8 and 9 form the side wall and upper wall surface of the air passage in the duct. Further, since the duct 3 is arranged on the upper part of the sheet-like heat insulating material 22 laid on the upper part of the floor slab 1, the lower surface of the duct 3 is formed by the heat insulating material 22.

The side covers 6 and 7 are formed by bending a rectangular steel plate into a U-shaped cross section. The side covers 6 and 7 include an upper flange portion 24 and a lower flange portion 26 in which both end portions of the substrate portion 25 are bent at a right angle. Here, the side cover 6 of the main duct 2 and the side cover 7 of the branch duct 4 have the same shape (the same cross section).

The

top plates

8 and 9 are rectangular steel plates. Here, the top plate 8 of the main duct 2 is formed wider than the top plate 9 of the branch duct 4. In this duct structure, the width of the

top plates

8 and 9 is adjusted according to the amount of conditioned air flowing through the cavity in the duct 3 to enlarge and reduce the cavity, and other side covers are shared parts. The necessary air volume is secured by using

The

positioning members

10 and 11 are elongated steel materials having a U-shaped cross section including a side surface portion and a bottom surface portion 30. The reinforcing metal fitting 14 is also an elongated steel material having a U-shaped cross section composed of a side surface portion and a bottom surface portion 32. The

positioning members

10 and 11 press and fix the side covers 6 and 7 and determine the size of the width of the duct 3.

The adjusting

members

12 and 13 are steel materials in which sandwiching

pieces

34 and 34 bent upward are formed at both ends of the elongated plate material, respectively. The adjusting

members

12 and 13 adjust the widths of both side covers arranged to face each other.

The nozzle fixing plate 16 is formed by bending both sides of a rectangular steel plate downward, and includes a top plate portion 36 and

flange portions

38 and 38. A circular hole 40 for attaching the jet nozzle 18 is provided at the center of the top plate 36.

In the jet nozzle 18, a radiating portion 44 having a diameter gradually increasing is formed on an upper portion of a cylindrical base portion 42 through which air passes. At the distal end of the radiating portion 44, a radiating port 46 cut out at a predetermined interval is provided. As said heat insulating material 22, what formed the form of the independent foam type in the sheet form from the point of airtightness is used.
In addition, each member which comprises the duct 3 can use a stainless steel material or an aluminum material according to the field environment etc. other than steel materials.

The duct 3 is mainly composed of the side covers 6 and 7 and the

top plates

8 and 9, which are transported to the site as they are and then assembled into the duct 3 on the site. The side covers 6 and 7 and the

top plates

8 and 9 are not bulky, so that they can be easily transported, and the duct 3 has a simple structure, so that construction work is also easy.

Thus, the above duct structure does not require any dedicated parts for the construction of the connecting portion, and each member forming the duct 3 can be easily processed on site and can be connected by on-site processing. And since each member can be assembled and connected easily by screwing and does not require specialized technology, underfloor air conditioning duct construction at the site can be performed by a floor construction contractor instead of a duct construction contractor. is there.

Here, the construction procedure in the field of the duct 3 which concerns on the said underfloor air-conditioning duct structure is demonstrated.
First, a heat insulating material 22 is laid on an indoor floor slab 1 (here, a concrete slab) that performs underfloor air conditioning of a building.

Next, for assembling the main duct 2, two side covers 6 and 6 having a predetermined length are arranged at a predetermined interval. At this time, the lower flange portions 26 of the side covers 6 and 6 face each other, and the lower flange portions 26 are placed on the heat insulating material 22 so that the substrate portion 25 is erected. As a result, the

upper flange portions

24, 24 of the side covers 6, 6 are also in a state of facing each other.

Further, when the main duct 2 is arranged, the connecting portions for connecting the branch duct 4 are provided with a space between the side covers 6 in the size of the sectional shape of the branch duct 4. This interval is set such that the end of the branch duct 4 can slightly enter the portion and can be connected without a gap. As another form of this connecting portion, the substrate portion 25 of the side cover 6 of the main duct 2 may be cut into a rectangular shape, and an opening having the same size as the cross-sectional shape of the branch duct 4 may be provided.

Then, the adjusting member 12 is disposed between the lower portions of the side covers 6 and 6. The adjusting member 12 is arranged so that both the sandwiching

pieces

34 and 34 are respectively brought into contact with the substrate portions 25 of the side covers 6 and 6, and adjusts the distance between the side covers 6 and 6. The adjusting member 12 is arranged at a predetermined interval.

Further, the positioning member 10 is disposed between the side covers 6 and 6 with the side surfaces thereof facing upward, and the end portions of the bottom surface portion 30 of the positioning member 10 are connected to the left and right

lower flange portions

26 and 26, respectively. Place on top. The positioning member 10 is arranged in a state of being superimposed on the adjustment member 12. It should be noted that a hole for fastening is opened in advance in the bottom surface portion 30 and the adjustment member 12 of the positioning member 10.

Then, the positioning member 10 fixes the bottom surface portion 30 to the floor slab 1 together with the adjusting member 12 using a fastener such as an anchor fitting 50 (anchor plug). Thereby, the side covers 6 and 6 which comprise the main duct 2 are standingly fixed to the upper part of the heat insulating material 22 in the state which faced each other. The positioning member 10 fixes the positions of the side covers 6 and 6 and determines the distance between them from the inside. The positioning member 10 is disposed at a predetermined interval and fixes the side cover.

Next, the top plate 8 is disposed between the

upper flange portions

24, 24 of the facing side covers 6, 6, and the top plate 8 is fixed to the upper flange portion 24 using a fastening tool such as a screw 52. At this time, a gasket material may be interposed between the upper flange portion 24 of the side cover 6 and the top plate 8 in order to maintain hermeticity.

Furthermore, in order to reinforce the top plate 8, the reinforcing metal fitting 14 is passed between the upper flange portions 24 and fixed to the upper flange portions 24 on both sides by using fasteners such as screws 52. The reinforcing metal fitting 14 is fixed to the top plate 8 with a screw 52 or the like at the intermediate portion. The reinforcing metal fitting 14 may be fixed to the top plate 8 in advance using screws 52 or the like. The joints between the top plates 8 are also overlapped with each other and fastened with screws 52.

On the other hand, in the assembly of the branch duct 4, as in the assembly of the main duct 2, the two side covers 7 having a predetermined length are faced to each other with a certain distance therebetween, and each lower flange portion 26 is placed above the heat insulating material 22. The substrate unit 25 is placed in a standing state.
The connecting portion between the main duct 2 and the branch duct 4 is arranged in a state in which the end of the branch duct 4 protrudes from between the board portions 25 of the side cover 6 of the main duct 2.

Then, the adjustment member 13 is arranged so that the side covers 7 and 7 are sandwiched by the both clamping

pieces

34 and 34 to adjust the interval, and the positioning member 11 is arranged between the upper portions of the

lower flange portions

26 and 26. The positioning member 11 is fixed to the floor slab 1 together with the adjustment member 13 using the anchor fitting 50 or the like. As a result, the side covers 7 and 7 constituting the branch duct 4 are erected and fixed to the upper portion of the heat insulating material 22 in a state where the side covers 7 face each other. The positioning member 11 is arranged at a predetermined interval and fixes the side cover.

Next, the top plate 9 is disposed between the

upper flange portions

24, 24 of the facing side covers 7, 7, and the top plate 9 is fixed to the upper flange portion 24 using a fastening tool such as a screw 52 or the like. Further, the connection fitting 20 is attached to the corner portion of the connecting portion between the main duct 2 and the branch duct 4 using screws 52 or the like. With this connection fitting 20, the main duct 2 and the branch duct 4 are connected without a gap.

Furthermore, a nozzle fixing plate 16 is arranged at a predetermined interval in place of the top plate 9 in a part of the branch duct 4. In the place where the nozzle fixing plate 16 is arranged, a necessary interval is provided between the top plates 9. The nozzle fixing plate 16 is attached so that the left and

right flange portions

38, 38 sandwich the substrate portion 25 of each

side cover

7, 7, and both end portions of the top plate portion 36 are respectively connected to the upper flange portion 24 of the

side cover

7, 7. Secure with screws 52 or the like.

At this time, a gasket material may be interposed between the upper flange portion 24 of the side cover 7 and the nozzle fixing plate 16. Then, the base portion 42 of the jet nozzle 18 is inserted into the hole portion 17 of the nozzle fixing plate 16 so as to be movable up and down. At this time, a ring spring or the like is interposed in the base portion 42 of the jet nozzle 18 to freely adjust the height position of the jet nozzle 18. A form in which a hole for fixing the nozzle is provided in the top plate 9 and the jet nozzle 18 is attached to the hole may be employed.

FIG. 3 is a view of the duct 3 as viewed from the branch duct 4 side.
As shown in this figure, a floor surface 61 is formed on a floor portion of a room by laying a floor plate 60 on a receiving portion 58 on an upper portion of a floor support leg 56 installed on the floor slab 1. In this floor portion, an underfloor space portion 62 is formed between the floor slab 1 and the floor board 60, and the main duct 2 and the branch duct 4 are arranged as the duct 3 therein. After the duct 3 is constructed, the floor is subsequently constructed.

The jet nozzle 18 disposed at the upper part of the branch duct 4 has a radiating portion 44 located on the back surface of the floor plate 60. The jet nozzle 18 blows conditioned air from the radiating port 46 of the radiating portion 44 toward the back surface of the floor plate 60 obliquely above, thereby performing air conditioning under the floor and above the floor (in the room).

FIG. 4 is a plan view in which the duct 3 is disposed in the underfloor space 62. Here, the main duct 2 is arranged in a U-shape, and the branch ducts 4 branched from the left and right main ducts 2 are arranged at regular intervals. An air conditioner 64 is connected to the main duct 2 and sends out conditioned air such as heating and cooling. The branch duct 4 is connected to the main duct 2 on both sides and sends conditioned air from both sides so that the conditioned air is blown out uniformly from the jet nozzles 18 of the branch duct 4.

The above-mentioned underfloor air-conditioning duct structure can be widely applied from large spaces such as physical education facilities to offices, schools, stores, and even houses.

Therefore, according to the above embodiment, since a simple structure based on a pair of side covers and a top plate is adopted, the assembly of the duct is easy and no specialized technique is required. By simply assembling and constructing both the floor and the duct, the construction process can be unified and the construction period can be adjusted smoothly, contributing to cost reduction. In addition, by unifying the construction process, the flexibility of the layout of the underfloor air-conditioning space and the arrangement form of the ducts can be improved to meet the needs of the site and no special dedicated parts are required. We were able to reduce it and were able to plan significant cost reduction.

Furthermore, with regard to the duct, by adjusting the width of the top plate, it is possible to adjust the ventilation capacity on site, increasing the degree of freedom in construction and providing a duct suitable for the site. . In addition, the installation of the jet nozzle to the duct is simple and excellent in workability, and the duct form and the height of the jet nozzle can be adjusted to accommodate low floor floors with excellent floor flexibility. .

Next, the underfloor air-conditioning duct structure according to the second embodiment will be described.
FIG. 6 is a partial perspective view of the air conditioning duct according to this embodiment. This underfloor air-conditioning duct structure is different from the first embodiment in that a bottom plate is added to the duct and a jet nozzle mounting structure.
Regarding this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted here.

The duct 103 forming the underfloor air-conditioning duct structure includes a main duct 102 and a plurality of branch ducts 104 branched from the main duct 102 at a predetermined interval.

The main duct 102 has a pair of side covers 6, 6, a top plate 8, a positioning member 10, a bottom plate 110, an adjustment member 12, a reinforcing bracket 14, and the like that are disposed facing each other. The branch duct 104 also includes a pair of side covers 7, 7, a top plate 9, a positioning member 11, a bottom plate 111, and an adjustment member 13 that are disposed facing each other, and further includes an introduction duct mounting plate 116. .

The

bottom plates

110 and 111 are rectangular steel plates. Here, the bottom plate 110 of the main duct 102 is formed wider than the bottom plate 111 of the branch duct 104. In this duct structure, the widths of the

top plates

8 and 9 and the

bottom plates

110 and 111 are adjusted according to the amount of conditioned air flowing through the cavities in the duct 103 to enlarge and reduce the cavities, and the other side. Covers, etc., secure necessary airflow by using shared parts.

As described above, the duct 103 is formed by the side covers 6, 7, the

top plates

8, 9 and the

bottom plates

110, 111 to form four side walls on the side, upper and lower sides of the air passage in the duct. And the said duct 103 is arrange | positioned at the upper part of the sheet-like heat insulating material 22 laid in the upper part of the floor slab 1. FIG.
In addition to the steel material, each member constituting the duct 103 may be a metal material such as a stainless material or an aluminum material, a heat-resistant synthetic resin material, or the like, depending on the environment at the site.

The jet nozzle 118 has a hollow disk-shaped substrate portion 142 having an air inlet at the center, and a cylindrical radiating portion 144 formed on the upper portion, and in the vicinity of the upper end portion of the radiating portion 144. Radiation ports 146 that are opened at predetermined intervals are formed. An upper plate portion 148 having a substantially disc shape and having fixing portions 147 on the left and right sides is attached to the upper end portion of the radiating portion 144.
The introduction duct 120 is a flexible duct that can be bent freely by applying a nonflammable sheet material to a coil spring, and is a duct that introduces conditioned air from a branch duct (main duct) or the like.

The duct 103 is mainly composed of side covers 6, 7,

top plates

8, 9, and

bottom plates

110, 111. These are transported to the site as they are and then assembled into the duct 103 on the site.
As described above, the duct structure does not require a dedicated part for the construction of the connecting portion, and each member forming the duct 103 can be easily processed on site and can be connected by on-site processing. And underfloor air-conditioning duct construction on site can be performed by a floor construction contractor instead of a duct construction contractor.

Here, the construction procedure in the field of the underfloor air-conditioning duct structure is substantially the same as the procedure according to the first embodiment, and here, mainly different points will be described.
First, a heat insulating material 22 is laid on the indoor floor slab 1, and two side covers 6, 6 having a predetermined length are placed on the floor slab 1 for assembling the main duct 2, and the upper and lower flange portions are formed. Place them facing each other.

Then, the adjusting member 12 is arranged at a predetermined interval between the lower portions of the side covers 6 and 6. Furthermore, the bottom plate 110 is disposed between the side covers 6 and 6, and both end portions thereof are placed on the upper portions of the left and right

lower flange portions

26 and 26, respectively.

Also, the positioning member 10 is disposed on the bottom plate 110. The positioning member 10 is disposed so as to overlap between the side covers 6 and 6 and above the adjustment member 12 via the bottom plate 110. Then, the bottom surface portion 30 of the positioning member 10 is fixed to the floor slab 1 together with the bottom plate 110 and the adjustment member 12 using a fastener such as the anchor fitting 50.

Next, the top plate 8 is disposed between the

upper flange portions

24, 24 of the facing side covers 6, 6, and the top plate 8 is fixed to the upper flange portion 24 using a fastening tool such as a screw 52. Further, the reinforcing metal fitting 14 is fixed to the top of the top plate 8.

On the other hand, in the assembly of the branch duct 104, as in the assembly of the main duct 102, the two side covers 7 and 7 having a predetermined length are arranged facing each other at a predetermined interval. And the adjustment member 13 is arrange | positioned in these lower parts, and the space | interval between the side covers 7 and 7 is adjusted.
Further, the bottom plate 111 is disposed between the side covers 6 and 6, and both end portions thereof are placed on the upper portions of the left and right

lower flange portions

26 and 26, respectively.

Further, the positioning member 11 is disposed on the top of the bottom plate 111, and the bottom surface portion 30 of the positioning member 11 is fixed to the floor slab 1 together with the bottom plate 111 and the adjustment member 13 using the anchor fitting 50. Then, the top plate 9 is disposed and fixed between the

upper flange portions

24, 24 of the facing side covers 7, 7.

Further, with respect to the side cover 7 of the branch duct 104, the introduction duct mounting plate 116 is fixed with a screw or the like at a predetermined position (previously provided with a hole) of the substrate portion 25. Then, the introduction duct 120 is connected to an air introduction port 117 provided at the center of the introduction duct mounting plate 116. A jet nozzle 118 is attached to the leading end of the introduction duct 120.

FIG. 7 is a view of the duct 103 as viewed from the branch duct 104 side.
As shown in this figure, the jet nozzle 118 is attached to the back surface 63 of the floor board 60 laid on the floor of the room.
The jet nozzle 118 is fixed to the back surface 63 of the floor plate 60 by using a fixing 119 such as a screw on a fixing portion 147 provided on the upper plate portion 148. The jet nozzle 118 blows conditioned air from the plurality of radiant openings 146 of the radiating portion 144 toward the back surface 63 of the floor plate 60 obliquely above, thereby performing air conditioning (radiation) under the floor and above the floor (indoors).

Therefore, according to this embodiment, as in the first embodiment, it is easy to assemble the duct and no special technique is required, and on the site, both the floor portion and the duct are assembled only by a floor builder. Construction can unify the construction process, enable smooth adjustment of work schedule, and contribute to cost reduction. In addition, by unifying the construction process, the flexibility of the layout of the underfloor air-conditioning space and the layout of the ducts can be improved, and it can be properly adapted to the needs of the site, and there is no need for special dedicated parts, greatly reducing costs. I can plan. Moreover, there is an effect that the attachment position of the jet nozzle can be selected relatively freely and the degree of freedom in design can be increased.

In the first and second embodiments described above, the cross section of the duct (main duct, branch duct) is rectangular, but other than this, a thin metal plate or a synthetic resin plate that can be easily formed is used. Therefore, it is possible to adopt a trapezoidal shape or a rhombus shape for the cross section.

DESCRIPTION OF SYMBOLS 1 Floor slab 3

Duct

6, 7

Side cover

8, 9

Top plate

10, 11 Positioning member 18 Jet nozzle 22 Heat insulating material 25 Board | substrate part 24 Upper flange part 26 Lower flange part 50 Anchor metal fittings

Claims

In the air conditioning structure in which the conditioned air from the air conditioning equipment for cooling and heating is circulated in a duct arranged in the space under the floor, and this conditioned air is blown to the back surface of the floor plate, or blown into the room through the outlet,
The duct is
Thermal insulation laid on top of the floor slab,
A flat substrate portion, and a shape composed of an upper flange portion and a lower flange portion where both end portions of the substrate portion are bent in the same direction, are arranged facing each other with the lower flange portion downward on the heat insulating material. A pair of side covers,
A positioning member placed between the lower flange portions and fixed to the floor slab with an anchor fitting;
An underfloor air-conditioning duct structure comprising: a top plate disposed between upper flange portions of the both side covers and fastened by a fastening tool.
2. The underfloor air-conditioning duct structure according to claim 1, wherein a bottom plate is disposed between the upper portions of the lower flange portions of the both side covers, and the positioning member is disposed on the upper portion of the bottom plate.
The underfloor air-conditioning duct structure according to claim 1 or 2, wherein a hole is formed in the top plate, and a jet nozzle for blowing conditioned air to the back surface of the floor plate is attached to the hole.
One end portion of the introduction duct is attached to the hole formed in the substrate portion of the side cover, and the upper end portion of the jet nozzle attached to the other end portion of the introduction duct is fixed to the back surface of the floor plate. The underfloor air-conditioning duct structure according to claim 1 or 2, characterized in that is sprayed on a back surface of the floor board.