Under-bed air conditioner construction

Abstract

To provide an underfloor air-conditioning structure capable of transmitting shear force to a slab while suppressing heat loss.SOLUTION: An underfloor air-conditioning structure 20 has a slab 30 provided with a plurality of rectangular or circular through-holes 34, and an air-conditioning duct 40 connected to each of the plurality of through-holes 34 from below the slab 30 to blow out air-conditioned air from the through-holes 34 to above the slab 30.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an underfloor air conditioning structure. [Background technology]

[0002] The following Patent Document 1 describes a floor-blowout air conditioning system in which conditioned air flows into a cavity formed by a groove formed in the lower slab and is then blown out from an outlet provided in the upper slab. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-41555 Summary of the Invention [Problem to be solved by the invention]

[0004] In the underfloor air-conditioning system of Patent Document 1, a cavity formed by a recessed groove in the lower slab functions as an underfloor chamber. This cavity is located across the entire surface of the concrete slab. Therefore, even when conditioned air is blown out from only a few outlets, the conditioned air is blown out above the slab through a wide underfloor chamber. This can result in heat loss and reduced air-conditioning efficiency.

[0005] Furthermore, the slab's air outlets are sometimes slit-shaped to ensure the desired airflow. In such cases, the slab's strength is reduced because it cannot transmit shear forces at the slits. This requires the slab to be reinforced in some way, which not only complicates the building's structure but also increases the cost and construction time required for the reinforcement structure.

[0006] In consideration of the above, the present invention aims to provide an underfloor air conditioning structure that can transmit shear force to the slab while suppressing heat loss. [Means for solving the problem]

[0007] The underfloor air conditioning structure of claim 1 comprises a slab connected to an exterior wall that resists earth pressure and provided with a plurality of rectangular or circular through-holes, and air conditioning ducts connected to each of the plurality of through-holes from below the slab and blowing conditioned air from the through-holes above the slab, A part of the slab is provided with a step portion that is formed integrally with the slab and is beveled from the surrounding area, and a double floor that covers the step portion and is equipped with a ventilation plate, and multiple through holes are formed in the bottom surface of one of the step portions, and the through holes are formed in the bottom surface of the step portion.

[0008] In the underfloor air conditioning structure of claim 1, the air conditioning duct is connected to a through-hole provided in the slab. Conditioned air is then blown out above the slab from the through-hole. In other words, the air conditioning duct can directly condition the area above the slab. Therefore, compared to, for example, a case where the underfloor space of a double floor formed across the entire surface of the slab is used as an air conditioning chamber, heat loss can be reduced and air conditioning efficiency is high.

[0009] In addition, air conditioning ducts are connected to each through-hole. In other words, one air conditioning duct is connected to each through-hole. This allows the required amount of conditioned air to be blown out by adjusting the amount of air sent to the air conditioning duct. This eliminates the need to form slits in the slab, minimizing cross-sectional loss in the slab.

[0010] A slab with slits has difficulty transmitting shear forces because it is cut off by the slits. In contrast, if the cross-sectional loss of the slab is reduced, it becomes easier to transmit shear forces.

[0011] One aspect of the underfloor air conditioning structure is A part of the slab is provided with a step portion that is formed integrally with the slab and is beveled from the surrounding area, and a double floor that covers the step portion and is equipped with a ventilation plate, and multiple through holes are formed in the bottom surface of one of the step portions, and the through holes are formed in the bottom surface of the step portion.

[0012] In one aspectIn underfloor air conditioning, the space between the double floor and the step can be used as an air conditioning chamber. This step is formed in only a part of the slab, not the entire slab. Therefore, compared to using the underfloor space of a double floor formed across the entire slab as an air conditioning chamber, heat loss can be reduced and air conditioning efficiency is high.

[0013] Furthermore, because the ventilation panels of the double floor do not affect the slab strength, their placement and shape can be freely set, ensuring the desired air outlet area in the desired position regardless of the placement or shape of the through-holes.

[0014] Furthermore, because the step is formed integrally with the slab, shear forces can be transmitted between the step and the slab. Shear forces can also be transmitted between the slabs on either side of the step. In this case, through holes are formed on the bottom surface of the step, but compared to slits, cross-sectional loss of the slab is suppressed, making it easier to transmit shear forces.

[0015] Claim 2 The underfloor air conditioning structure is Claim 1 In the underfloor air conditioning structure described in , the through-hole and the step portion are provided along a glass outer wall arranged on the outer periphery of the building.

[0016] Claim 2 In the underfloor air conditioning structure, through-holes from which conditioned air is blown out are provided along the periphery of the building, allowing for efficient air conditioning of the periphery, which has a high air conditioning load. Claim 3 The underfloor air conditioning structure is A slab connected to an exterior wall that resists earth pressure and having a plurality of rectangular or circular through holes, and air conditioning ducts connected to each of the plurality of through holes from below the slab and blowing conditioned air from the through holes to above the slab, wherein a step portion formed integrally with the slab in a part of the slab and having a surface that is beveled from the surrounding area, and a double floor covering the step portion and having a ventilation plate, wherein a plurality of the through holes are formed in the bottom surface of one of the step portions, and the through hole is formed in the bottom surface of the step portion, The slab thickness at the step portion is equal to the slab thickness at the other portion. [Effects of the Invention]

[0017] According to the present invention, it is possible to transmit shear force to the slab while suppressing heat loss. [Brief explanation of the drawings]

[0018] [Figure 1]1 is a cross-sectional view partially showing a building to which an underfloor air conditioning structure according to an embodiment of the present invention is applied. [Figure 2] 1 is a cross-sectional view showing an underfloor air conditioning structure according to an embodiment of the present invention. [Figure 3] 3 is a plan view showing the arrangement of step portions and through holes in an underfloor air conditioning structure according to an embodiment of the present invention. FIG. [Figure 4] 1 is a plan view showing an underfloor air conditioning structure according to an embodiment of the present invention. [Figure 5] FIG. 10 is a plan view showing a comparative example. [Figure 6] 10 is a cross-sectional view showing a modified example of a step portion in an underfloor air conditioning structure according to an embodiment of the present invention. FIG. [Figure 7] FIG. 10 is a cross-sectional view showing a modified example in which a step portion is not formed in the underfloor air conditioning structure according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an underfloor air conditioning structure according to an embodiment of the present disclosure will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and multiple components may be present.

[0020] Furthermore, descriptions of overlapping configurations and symbols in each drawing may be omitted. Note that the present disclosure is not limited to the following embodiments, and may be implemented by making appropriate modifications, such as omitting configurations or replacing them with different configurations, within the scope of the purpose of the present disclosure.

[0021] <Building> 1, a building 10 to which an underfloor air conditioning system 20 according to an embodiment of the present invention is applied is a high-rise building with a basement floor. In this building 10, an exterior wall 14 of the basement floor is provided outside an exterior wall 12 of the ground floor.

[0022] The exterior wall 14 of the basement floor is made more rigid than the other walls of the building 10 in order to resist earth pressure. In addition, the slab 30 of the first floor of the building 10 is connected to the exterior wall 14. Therefore, the horizontal force acting on the building 10 during an earthquake flows through the slab 30 to the exterior wall 14. In other words, a shear force acts on the slab 30.

[0023] The building 10 has an entrance hall 16. The entrance hall 16 is an open-ceiling space with two or more floors. Therefore, compared to a single-floor room, it has a larger air volume and a larger air-conditioning load. Furthermore, the exterior wall 16A of the entrance hall 16 is made of glass. Therefore, compared to an exterior wall insulated with concrete or the like, it is more susceptible to the effects of outside temperature and sunlight, and the air-conditioning load is larger.

[0024] There are no particular limitations on the air volume or exterior wall structure of the room to which the underfloor air conditioning structure 20 can be applied, but in this embodiment, the underfloor air conditioning structure 20 is used to air condition the entrance hall 16, which has a high air conditioning load.

[0025] <Underfloor air conditioning structure> 2 shows an underfloor air conditioning structure 20. The underfloor air conditioning structure 20 is applied to a portion of the entrance hall 16 close to the exterior wall 16A. The "portion close to the exterior wall 16A" is also called the perimeter zone, and is a portion within approximately 5 m from the exterior wall 16A. The underfloor air conditioning structure 20 is formed with a slab 30, an air conditioning duct 40, and a raised floor 50.

[0026] (Slab) The slab 30 has a groove-like step 32 that is a portion that is recessed from the surrounding area. As shown in Figure 3, this step 32 is formed in the shape of an L-shaped band in plan view along the outer wall 16A of the entrance hall 16. In other words, the step 32 is formed in the perimeter zone of the entrance hall 16. Note that the double floor 50 is not shown in Figure 3.

[0027] The depth of the step portion 32 shown in Fig. 2 is, for example, 100 mm to 200 mm. The slab thickness of the step portion 32 (for example, 300 mm) and the slab thickness of the other portions are formed to be the same. The step portion 32 and the other portions of the slab 30 are structured to be able to transmit shear forces acting between them during an earthquake.

[0028] A through-hole 34 is provided on the bottom surface of the step portion 32. The through-hole 34 has a square (rectangular) shape with a side of, for example, approximately 450 mm in plan view. One end of an air conditioning duct 40 is connected to this through-hole 34 from below the slab 30.

[0029] 3, a plurality of through holes 34 are formed in the bottom surface of the step portion 32. More specifically, the through holes 34 are provided at predetermined intervals (every 3.6 m in this embodiment) along the outer wall 16A of the entrance hall 16.

[0030] (Air conditioning duct) The air conditioning ducts 40 are connected to the respective through holes 34. As shown in Fig. 2, the air conditioning ducts 40 have a cross-sectional shape that corresponds to the planar shape of the through holes 34. That is, the air conditioning ducts 40 have a square (rectangular) shape with sides of approximately 450 mm, and are fitted into and connected to the through holes 34. Alternatively, the air conditioning ducts 40 are fixed to the underside of the step portion 32 using a jig or the like so that the interior of the air conditioning duct 40 and the interior of the through holes 34 are in communication with each other.

[0031] The end of the air conditioning duct 40 opposite to the end connected to the through-hole 34 is connected to an air conditioning device (not shown). This allows the air conditioning duct 40 to blow conditioned air generated by the air conditioning device out above the slab 30 through the through-hole 34.

[0032] The through-hole 34 may be circular in plan view, for example. In this case, it is preferable that the cross-sectional shape of the air conditioning duct 40 is also circular.

[0033] (double floor) The double floor 50 is a floor panel that covers the step portion 32. The double floor 50 is placed on the step portion 32 using, for example, beams 52. The top surface of the double floor 50 is at the same height as the finished surface of the slab 30 other than the step portion 32.

[0034] Additionally, a ventilation plate 54 is placed on the double floor 50. The ventilation plate 54 is formed using, for example, grating, and as shown by the arrow in Figure 2, has ventilation properties that allow conditioned air that has flowed into the lower space of the double floor 50 through the through-holes 34 to be blown out above the slab 30. Additionally, the ventilation plate 54 is rigid enough to allow people to pass above it.

[0035] As shown in Figure 4, the double floor 50 is placed across the entire surface of the stepped portion 32. Slits are formed in the double floor 50 along the outer wall 16A of the entrance hall 16, and ventilation plates 54 are fitted into these slits. The positions, widths, lengths, and numbers of the slits and ventilation plates 54 are arbitrary.

[0036] <Action and effect> In the underfloor air conditioning structure 20 according to the embodiment of the present invention, as shown in Figure 2, the air conditioning duct 40 is connected to a through-hole 34 provided in the slab 30 (in this embodiment, a step portion 32 in the slab 30). Conditioned air is then blown out above the slab 30 from the through-hole 34. In other words, the area above the slab 30 can be directly air-conditioned from the air conditioning duct 40. For this reason, compared to, for example, a case in which the underfloor space of a double floor formed over the "entire surface" of the slab 30 is used as an air-conditioning chamber, heat loss can be reduced and air conditioning efficiency is high.

[0037] Furthermore, the air conditioning ducts 40 are connected to each of the through holes 34. That is, one air conditioning duct 40 is connected to each through hole 34. This makes it possible to ensure the required amount of conditioned air being blown out by adjusting the amount of air sent to the air conditioning duct 40. This eliminates the need to form slits in the slab 30, and reduces the cross-sectional loss of the slab 30.

[0038] A comparative example is shown in Fig. 5. As shown in this comparative example, a slab 30 having a slit 100 formed therein is separated by the slit 100. The slit 100 needs to be arranged to have a width of, for example, 500 mm and a length equal to the length of the perimeter zone, excluding portions that are divided by beams or the like. Therefore, it is difficult for the slab 30 to transmit shear force when directing the horizontal force acting on the building 10 to the exterior wall 14 during an earthquake.

[0039] In order to transmit shear force to a slab 30 having such slits 100, it is necessary to reinforce the slab 30, for example, by using horizontal braces 102 or by increasing the thickness of the slab 30. Implementing such reinforcement not only complicates the structure of the building, but also requires costs and construction time for the reinforcement structure.

[0040] In contrast to this, if the cross-sectional loss penetrating the slab is made smaller than that of a slit, like the through-hole 34 in the underfloor air conditioning structure 20 according to this embodiment, the shear force can be transmitted more easily.

[0041] Furthermore, in the underfloor air conditioning structure 20 according to the embodiment of the present invention, the space between the double floor 50 and the step 32 can be used as an air conditioning chamber, as shown in Fig. 2. This step 32 is formed in a part of the slab 30, not the entirety, as shown in Fig. 3. For this reason, compared to when the underfloor space of a double floor formed over the entire surface of the slab 30 is used as an air conditioning chamber, heat loss can be suppressed and air conditioning efficiency is high.

[0042] Furthermore, the ventilation plates 54 of the double floor do not affect the bearing capacity of the slab 30, so their placement and shape can be freely set. This makes it possible to ensure a desired air outlet area at a desired position, regardless of the placement and shape of the through holes 34. In other words, the placement and shape of the ventilation plates 54 are not limited to the example shown in Figure 4, and can be freely selected.

[0043] 2, the step portion 32 is formed integrally with the slab 30, so that shear forces can be transmitted between the step portion 32 and the slab 30. Shear forces can also be transmitted between the slabs 30 that sandwich the step portion 32. In this case, the through hole 34 is formed in the bottom surface of the step portion 32, and cross-sectional loss of the slab 30 is suppressed compared to the slit 100 shown in the comparative example, so that shear forces can be transmitted more easily.

[0044] Furthermore, in the underfloor air conditioning structure 20 according to the embodiment of the present invention, as shown in Figure 3, through-holes 34 from which conditioned air is blown out are provided along the outer periphery of the building 10. This allows for efficient air conditioning of the outer periphery, which has a high air conditioning load.

[0045] In this embodiment, the step portion 32 is formed in a groove shape, but the embodiment of the present invention is not limited to this. The step portion in the present invention also includes a step portion 36 (slab step) that is recessed from the other parts of the slab 30 and is not groove-shaped, as shown in Figure 6, for example. This step portion 36 can be formed with an additional portion 30A or the like as appropriate.

[0046] 6, the double floor 50 does not cover the entire surface of the step portion 36. In this way, the "double floor covering the step portion" in the present invention may cover only a portion of the step portion.

[0047] Furthermore, in the present invention, the step portions 32 and 36 do not necessarily have to be formed in the slab 30. For example, as shown in Fig. 7, through holes 34 may be provided in the slab 30 without these. In this case, a ventilation plate 54 is installed at the upper end of the through holes 34. However, even in this embodiment, an air conditioning duct 40 is connected to each of the through holes 34. [Explanation of symbols]

[0048] 20 Underfloor air conditioning structure 30 Slabs 32 Step 34 Through hole 36 Step 40 Air conditioning duct 50 double floor 54 Ventilation board

Claims

1. a slab connected to an exterior wall that resists earth pressure and having a plurality of rectangular or circular through-holes; an air conditioning duct connected to each of the plurality of through holes from below the slab and blowing conditioned air from the through holes above the slab; and A step portion formed integrally with the slab in a part of the slab and having a surface recessed from the surrounding area; A double floor covering the step portion and equipped with a ventilation plate; Equipped with a plurality of the through holes are formed in the bottom surface of one of the step portions, The through hole is formed in the bottom surface of the step portion. Underfloor air conditioning structure.

2. The underfloor air conditioning structure according to claim 1 , wherein the through-hole and the step are provided along a glass exterior wall arranged on the outer periphery of a building.

3. A slab connected to an exterior wall that resists earth pressure and has a plurality of rectangular or circular through holes; an air conditioning duct connected to each of the plurality of through holes from below the slab and blowing conditioned air from the through holes above the slab; and A step portion formed integrally with the slab in a part of the slab and having a surface recessed from the surrounding area; A double floor covering the step portion and equipped with a ventilation plate; Equipped with a plurality of the through holes are formed in the bottom surface of one of the step portions, the through hole is formed in the bottom surface of the step portion, The slab thickness of the step portion is equal to the slab thickness of the other portion. Underfloor air conditioning structure.

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