JP7130526B2 - floor vent air conditioning system - Google Patents

Description

The present invention is a floor outlet air-conditioning system in which an air-conditioning duct connected to an air conditioner is provided on the lower floor side of a building with a floor slab therebetween.

2. Description of the Related Art Double floors including floor slabs and spaced floor panels above the floor slabs are often used in office buildings and the like. The floor panel is supported on a plurality of posts erected on the floor slab. As a result, an underfloor space is formed between the floor slab and the floor panel, and various wirings and the like can be accommodated in this underfloor space. An air conditioning system may also be provided in the underfloor space.

For example, in Patent Document 1, a duct is provided in the underfloor space between the floor slab and the floor panel, through which conditioned air from the air conditioning equipment flows, and the air flowing through the duct is introduced into the room through the outlet provided in the floor panel. A blowing arrangement is disclosed.
However, in the configuration disclosed in Patent Document 1, the continuous duct provided along the upper surface of the floor slab interferes with the wiring etc. accommodated in the underfloor space, making it difficult to perform maintenance in the underfloor space. There was a problem.

On the other hand, in Patent Document 2, conditioned air (cold air or warm air) sent from an air conditioner is supplied to an underfloor section between a floor slab and a floor panel (OA floor), and is provided in the floor panel. A configuration is disclosed in which conditioned air in an underfloor space is blown into the room from a floor outlet.

Further, Patent Document 3 discloses a configuration in which conditioned air is supplied from an air-conditioned indoor unit located in the ceiling space on the lower floor through a duct to an underfloor space between a floor slab and a floor panel. . The conditioned air in the underfloor space is blown into the room from outlets provided in the floor panel.
However, in the configuration disclosed in Patent Literature 3, the duct is provided vertically through the floor slab. For this reason, in the event of a fire, the upper and lower floors across the floor slab would communicate with each other through the ducts, so it was necessary to form a fireproof partition between the upper and lower floors from the standpoint of disaster prevention planning.
Therefore, a fire damper is provided above or below the duct. Specifically, a fire damper installed on the upper or lower side of the duct is located in the underfloor space above the floor slab or in the space above the ceiling below the floor slab. This sometimes hindered effective use of the back space and maintenance. In addition, in order to avoid interference with other equipment and members installed in the underfloor space and ceiling space, it is necessary to raise the underfloor space or ceiling space, and there are cases where the installation position of the fire damper is restricted. be.

WO2011/013743 JP 2008-32255 A JP 2015-7335 A

The problem to be solved by the present invention is to provide a floor outlet air-conditioning system that has a high degree of installation freedom while being equipped with a fire damper.

The inventors of the present invention are targeting air conditioning systems in which air conditioners and air conditioning ducts are installed on the lower floor side of a building. Alternatively, without installing a fire damper in the space behind the ceiling on the lower side, the floor assembly and ceiling structure can be simplified, and the lower floor side of the building and the corresponding floor can be divided into fire prevention divisions (horizontal divisions). This led to the invention of an air-conditioning system for floor blowing.
In order to solve the above problems, the present invention employs the following means.
That is, the floor blowing air conditioning system of the present invention is a floor blowing air conditioning system having an air conditioning duct on the lower floor, and is installed in a through hole of a floor slab to ventilate from the lower side to the upper side of the floor slab. a vent device having a fire damper; the air conditioning duct connected to the vent device; The flange portion is engaged with the floor slab, and the fall prevention member includes a vertically extending tubular guard tubular portion and a lower end of the guard tubular portion. a mounting flange extending radially outward from the vent device, wherein the mounting flange is fixed to the vent device with screws .
According to this configuration, by providing the vent device having the fire damper in the through-hole formed in the floor slab, the upper floor and lower floor can be operated without installing the fire damper above or below the floor slab. A fire compartment can be formed in the floor slab that separates the floors. This eliminates the need to dispose a fire damper in the underfloor space above the floor slab or in the ceiling space below the floor slab. Therefore, when arranging the fire damper, there is no need to avoid interference with other members, etc., and the degree of freedom in the installation position of the vent device having the fire damper increases. In addition, the fire damper does not protrude above or below the floor slab, making it possible to effectively utilize the space under the floor and the space above the ceiling and to improve maintainability.
Further, by engaging the flange provided on the pipe portion of the vent device with the floor slab, the vent device can be easily and reliably installed in the through-hole of the floor slab.

In one aspect of the present invention, in the floor blowing air conditioning system of the present invention, the fire damper includes a plate-like door that is provided inside the pipe portion to shield the pipe portion in the event of a fire, and the outer periphery of the pipe portion Insulation is provided on the surface.
According to such a configuration, when a fire breaks out, a fireproof compartment (horizontal compartment) can be formed by closing the plate-like door. Also, normally, by opening the plate-shaped door, the conditioned air sent out from the air conditioner can be supplied to the underfloor space through the air conditioning duct and the vent device. Air-conditioned air sent from the air-conditioning duct passes through the inner side of the pipe portion, and heat insulation of the conditioned air can be achieved by providing a heat insulating material on the outer peripheral surface of the pipe portion.

In one aspect of the present invention, the fall prevention member is attached on the flange portion so as to prevent flying objects from entering the pipe portion.
According to such a configuration, by providing the fall prevention material on the collar portion provided on the pipe portion of the vent device, it is possible to prevent scattered objects from entering the vent device from the underfloor space above the floor slab. be able to.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the floor blowing air-conditioning system with a high degree of freedom of installation, although it is equipped with a fire damper.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the structure of the floor blowing air conditioning system which concerns on this invention. FIG. 2 is a partial cross-sectional view showing a vent device provided on a floor slab in the floor blowing air conditioning system of FIG. 1; FIG. 3 is a cross-sectional view of the vent device shown in FIG. 2 taken along the line II. FIG. 4 is a partial cross-sectional view showing a state in which the door of the vent device shown in FIG. 3 is open (a state in which the through hole is closed); FIG. 5 is a cross-sectional view of the vent device shown in FIG. 4 taken along line II-II. It is a schematic diagram of the outer member which comprises a vent apparatus.

The present invention comprises an air-conditioning duct provided on the lower floor side of a building sandwiching a floor slab, and a vent device having a fire damper provided inside the frame of the floor slab connected to the air-conditioning duct. It is a floor blowing air conditioning system.
EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the form for implementing the floor blowing air-conditioning system by this invention is demonstrated based on drawing.
FIG. 1 shows a cross-sectional view showing the configuration of a floor blowing air conditioning system according to the present invention.
As shown in FIG. 1, a floor outlet air conditioning system 10 is installed in a building 1 such as an office building. A building 1 has a plurality of floor slabs 2 spaced apart in the vertical direction. The floor slab 2 is formed of, for example, reinforced concrete or the like, has a predetermined thickness in the vertical direction, and is provided in a horizontal plane.
Above the floor slab 2, a floor panel 3 forming the floor surface of the upper floor Fa is provided with an interval in the vertical direction. The floor panel 3 is supported on a plurality of columns 4 erected on the floor slab 2 . Thus, each floor of the building 1 is provided with a double floor 5 composed of a floor slab 2 and a floor panel 3. - 特許庁An underfloor space Sa of the upper floor Fa is formed between the floor slab 2 and the floor panel 3 above the floor slab 2 .
A ceiling panel 6 forming the ceiling surface of the lower floor Fb is provided below the floor slab 2 with a space therebetween in the vertical direction. The ceiling panel 6 is supported by the lower ends of a plurality of hangers 7 provided on the lower surface of the floor slab 2 . Below the floor slab 2, between the floor slab 2 and the ceiling panel 6, a ceiling space Sb of the lower floor Fb is formed.

The floor outlet air conditioning system 10 mainly includes an air conditioner (not shown), an air conditioning duct 21 , a vent device 11 and a ventilation pipe 25 .
An air conditioner (not shown) performs a cooling operation, a heating operation, and the like, and sends conditioned air adjusted to a predetermined temperature into the air conditioning duct 21 . The air conditioning duct 21 is provided in the ceiling space Sb. The air-conditioning duct 21 has, for example, a square tubular shape with a rectangular cross section, and is supported on the lower surface of the floor slab 2 via hanging hardware (not shown) or the like. The ceiling space Sb in which the air conditioning duct 21 is arranged is infrequently subjected to work such as maintenance compared to the underfloor space Sa in which work may be frequently performed for changing the wiring layout. Therefore, by arranging the air conditioning duct 21 in the ceiling space Sb, it is possible to install a floor structure (especially a double floor structure) in which the height of the pocket (space) is kept low in the underfloor space Sa. Repair work can be easily performed.

FIG. 2 shows a cross-sectional view of a vent device provided in the floor slab in the floor blowing air conditioning system 10 of FIG. FIG. 3 shows a cross-sectional view taken along line II of FIG. FIG. 4 shows a cross-sectional view showing the state in which the door of the vent device in FIG. 3 is open (the state in which the through hole is closed). FIG. 5 shows a cross-sectional view taken along the line II--II in FIG. A perspective view and a plan view of an outer member provided in the vent device in this embodiment are shown in FIG. 6(a) and FIG. 6(b), respectively.
As shown in FIGS. 2 and 3, the vent device 11 is installed in a through hole 2h formed to vertically penetrate the floor slab 2. As shown in FIGS. The vent device 11 includes an outer member 12 , a fire damper 13 and a heat insulator 14 .
As shown in FIG. 6A, the outer member 12 integrally includes a vertically extending cylindrical tube portion 12a and an annular collar portion 12b projecting radially outward from the upper end portion of the tube portion 12a. I have. The pipe portion 12a has an outer diameter smaller than the inner diameter of the through-hole 2h by a predetermined dimension, and is inserted into the through-hole 2h to penetrate the floor slab 2 vertically. The flange portion 12b has an outer diameter that is larger than the inner diameter of the through hole 2h by a predetermined dimension. The flange portion 12b abuts its outer peripheral portion against the upper surface of the floor slab 2 on the radially outer side of the through hole 2h, and a fixing member 12c such as a screw is attached to the flange portion 12b shown in FIGS. It is fixed to the floor slab by passing through a fixing hole 12h formed in the . Thus, the outer member 12 is provided with the flange portion 12b engaged with the floor slab 2. As shown in FIG.

The heat insulating material 14 is provided outside the tube portion 12 a of the outer member 12 . The heat insulating material 14 is provided so as to cover the entire outer peripheral surface of the pipe portion 12a in the circumferential direction. Such heat insulating material 14 is made of, for example, rock wool or the like having heat insulating properties, heat resistance, and flame resistance. The heat insulating material 14 keeps the conditioned air passing inside the tube portion 12a warm. The heat insulating material 14 is preferably attached in advance to the outer peripheral surface of the tube portion 12a.

The fire damper 13 is provided inside the pipe portion 12 a of the outer member 12 . The fire damper 13 includes a vertically extending cylindrical damper housing 16 and a door 17 provided inside the damper housing 16 .
The damper housing 16 is inserted inside the tube portion 12 a of the outer member 12 . The damper housing 16 and the pipe portion 12a of the outer member 12 are connected in the radial direction by screws 16b penetrating from the inside of the damper housing 16 toward the pipe portion 12a. By screwing the damper housing 16 from the inside, the fire damper 13 can be easily replaced.
The door 17 has a pair of two substantially semicircular door plates 17a. The two door plates 17a are rotatable around a support shaft 17s that passes through the center of the damper housing 16 and extends radially. The two door plates 17a are sandwiched by the thermal fuse 18 while overlapping each other so as to extend upward from the support shaft 17s. The thermal fuse 18 melts when the ambient temperature reaches or exceeds a predetermined value. The two door plates 17a are biased by a biasing member such as a spring (not shown) in the direction of opening from the superimposed state.

As shown in FIGS. 2 and 3, the fire damper 13 is normally in a state in which two door plates 17a are overlapped with each other so as to extend upward from the support shaft 17s. In this state, in the damper housing 16, the underfloor space Sa on the upper side of the floor slab 2 and the ceiling space Sb on the lower side of the floor slab 2 are communicated with each other. The conditioned air can be ventilated.
As shown in FIGS. 4 and 5, the fire damper 13 melts the thermal fuse 18 when the ambient temperature exceeds a predetermined value in the event of a fire, releasing the clamping of the two door plates 17a. . The two door plates 17a released from the gripping by the thermal fuse 18 are opened about the support shaft 17s by the biasing force of the biasing member, and hit the stopper portion 16s provided on the inner peripheral surface of the damper housing 16. As shown in FIG. The two door plates 17a shield the interior of the damper housing 16 with their outer peripheries abutting against the stopper portion 16s and open, separating the underfloor space Sa of the upper floor Fa and the ceiling space Sb of the lower floor Fb. Compartment.

The vent device 11 having such a fire damper 13 is installed by inserting it from above inside a sleeve member 15 provided in the through hole 2h. The sleeve member 15 has a cylindrical shape and is provided so as to be in contact with the inner peripheral surface of the through hole 2h. The sleeve member 15 is made of a metal spiral duct tube and has an inner diameter larger than the outer diameters of the pipe portion 12 a of the outer member 12 and the heat insulating material 14 . The sleeve member 15 is provided by being driven into the concrete when the concrete forming the floor slab 2 is poured.
In this manner, the sleeve member 15 is arranged at the outermost edge of the through hole 2h, and the outer member 12 constituting the vent device 11 is provided inside the sleeve member 15, so that the sleeve member 15 and the outer member 12 are connected. A heat insulating material 14 is arranged between them. By arranging the sleeve member 15 at the outermost edge of the through hole 2h and installing the vent device 11 with the heat insulating material 14 inside the sleeve member 15, the vent device 11 is surely installed in the approximate center of the through hole 2h. can. In addition, the vent device 11 has a double-tube structure in which the sleeve member 15 is arranged on the outer side, so that the seismic strength against the seismic load can be enhanced.
Further, on the brim portion 12b of the outer member 12 of the fire damper 13, a material 19 for preventing scattering objects from falling is provided. The fall prevention member 19 integrally includes a vertically extending cylindrical guard tube portion 19a and a mounting flange portion 19b extending radially outward from the lower end of the guard tube portion 19a. The fall prevention member 19 is provided with a mounting flange portion 19b on the flange portion 12b of the outer member 12, and then a fall prevention member fixing member formed on the flange portion 12b shown in FIGS. It is provided by inserting a screw 19c into the hole 12i and fixing the screw 19c to the heat insulating material 14. As shown in FIG.

Such vent devices 11 are provided at a plurality of locations on the floor slab 2 . As shown in FIG. 1 , each vent device 11 and air conditioning duct 21 are connected via a ventilation pipe 25 . The ventilation pipe 25 is accordion-shaped and flexible, and one end thereof is connected to a branch port 21 s provided in the air conditioning duct 21 . The other end of the ventilation pipe 25 is connected to the pipe portion 12 a of the outer member 12 of the vent device 11 . A heat-retaining covering material 26 made of rock wool is provided on the outer peripheral surface of the ventilation pipe 25 . The thermal insulation covering material 26 is intended to thermally insulate the conditioned air passing through the ventilation pipe 25 .

In such a floor blowing air conditioning system 10 , conditioned air discharged from an air conditioner (not shown) is sent into the damper housing 16 of the fire damper 13 of the vent device 11 through the air conditioning duct 21 and the ventilation pipe 25 . The conditioned air passing through the damper housing 16 is supplied into the underfloor space Sa above the floor slab 2 . The conditioned air in the underfloor space Sa passes through the outlet 9 formed in the floor panel 3 and is sent into the indoor space Sc above the floor panel 3 .
In the event of a fire, the thermal fuse 18 melts to open the two door plates 17a to block the interior of the damper housing 16 vertically. As a result, the upper floor Fa and the lower floor Fb sandwiching the floor slab 2 are separated by the vent device 11 to form a fireproof partition.

The effects of the above-described floor-blowing air-conditioning system will be described below.
The floor outlet air-conditioning system 10 is equipped with an air-conditioning duct 21 on the lower floor Fb, is installed in the through hole 2h of the floor slab 2, and ventilates from the lower side of the floor slab 2 to the upper side. , a vent device 11 having a fire damper 13, and an air-conditioning duct 21 connected to the vent device 11, the vent device 11 having a cylindrical tube portion 12a and radially outward from the upper end of the tube portion 12a. A protruding flange 12b is provided, and the flange 12b is engaged with the floor slab 2. - 特許庁
According to such a configuration, by providing the vent device 11 having the fire damper 13 in the through hole 2h formed in the floor slab 2, the fire damper 13 can be installed above or below the floor slab 2. Instead, a fire compartment can be formed in the floor slab 2 separating the upper floor Fa and the lower floor Fb. As a result, when installing the fire damper 13 in the underfloor space Sa above the floor slab 2 and the ceiling space Sb below the floor slab 2, there is no need to avoid interference with other members, etc., and the vent device can be installed. 11 can be installed at a higher degree of freedom. In addition, the fire damper 13 does not protrude above or below the floor slab 2, effectively utilizing the underfloor space Sa and the space Sb above the ceiling, and removing the floor panel 3 from the floor to facilitate the space around the damper 13 and the damper. 13 main body can be maintained. Therefore, it is possible to provide the floor outlet air-conditioning system 10 having a high degree of installation freedom while including the fire damper 13 .
Further, by locking the flange portion 12b provided on the pipe portion 12a of the vent device 11 to the floor slab 2, the vent device 11 can be easily and reliably installed in the through hole 2h of the floor slab 2. becomes.

In addition, the floor blowing air conditioning system 10 has a fire damper 13, and the fire damper 13 has a plate-shaped door 17 that is provided inside the pipe portion 12a and shields the pipe portion 12a in the event of a fire. A heat insulating material 14 is provided on the outer peripheral surface of the portion 12a.
According to such a configuration, when a fire breaks out, the plate-shaped door 17 can be closed to form a fireproof compartment (horizontal compartment). Also, normally, by opening the plate-shaped door 17, the conditioned air sent out from the air conditioner can be supplied to the underfloor space Sa through the air conditioning duct 21 and the vent device 11. As shown in FIG. In addition, by providing the heat insulating material 14 on the outer peripheral surface of the pipe portion 12a, it is possible to heat the conditioned air passing through the inside of the pipe portion 12a. As a result, it is possible to suppress the deprivation of thermal energy from the air-conditioned air in the vent device 11 , and to increase the air-conditioning efficiency of the floor-blowing air-conditioning system 10 .

In addition, the floor outlet air conditioning system 10 has a fall prevention member 19 attached to the brim portion 12b.
According to such a configuration, by providing the fall prevention member 19 having the cylindrical guard tube portion 19a on the collar portion 12b provided on the pipe portion 12a of the vent device 11, the underfloor space Sa can be moved. It is possible to catch the flying debris with the cylindrical guard cylinder part 19a, and prevent the flying debris from entering the vent device 11 from the underfloor space Sa above the floor slab 2 during various operations. be able to.

In the above-described embodiment, the outer member 12 constituting the vent device 11 is formed of a cylindrical pipe portion 12a and an annular flange portion 12b projecting radially outward from the upper end portion of the pipe portion 12a. However, if the collar portion 12b has a shape that can be engaged with the floor slab, the cylindrical tube portion 12a can be formed like the outer member 12A whose perspective view and plan view are shown in FIGS. 6(c) and (d). It may be a rectangular plate member or bar member 12d which is continuously provided at a predetermined interval.
In the above embodiment, the vent device 11 is composed of the outer member 12, the fire damper 13, and the heat insulating material 14. However, depending on the building, the outer member 12 and the fire damper 13 may The vent device 11 may be composed of. In the above embodiment, the sleeve member 15 is installed at the outermost edge of the through hole 2h, and the vent device 11 having the fire damper 13 is provided inside the sleeve member 15. A vent device may be installed in the through hole 2h.
Further, in the above embodiment, the fall prevention member 19 is open on the upper side, but it may be a net member having a small opening so as to cover the pipe portion of the vent device.

2 floor slab 17 door 2h through-hole 19 fall prevention material 10 floor blow-out air-conditioning system 21 air-conditioning duct 11 vent device Fa upper floor 12a pipe section Fb lower floor 12b, 12d collar section Sa underfloor space 13 fire damper Sb ceiling space 14 heat insulating material

Claims (3)

An air-conditioning system for blowing a floor with an air-conditioning duct on the lower floor,
a vent device having a fire damper installed in a through-hole of a floor slab to allow air to flow from the bottom to the top of the floor slab;
the air conditioning duct connected to the vent device;
Equipped with a fall prevention material for scattering objects ,
The vent device includes a cylindrical pipe portion and a flange portion projecting radially outward from an upper end portion of the pipe portion, the flange portion being engaged with the floor slab ,
The fall prevention member includes a vertically extending cylindrical guard tube portion and a mounting flange portion extending radially outward from the lower end of the guard tube portion,
The mounting flange portion is fixed to the vent device with screws.
A floor blowing air conditioning system characterized by: The fire damper includes a plate-shaped door provided inside the pipe to shield the pipe in the event of a fire,
2. The floor blowing air conditioning system according to claim 1, wherein a heat insulating material is provided on the outer peripheral surface of said pipe portion. 3. The floor outlet air-conditioning system according to claim 1, wherein the fall prevention member is attached on the flange portion so as to prevent flying objects from entering the pipe portion.

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