JP7354389B1 - Indoor heating and cooling systems and heat transfer floor structures - Google Patents

Abstract

[Problem] In an indoor heating and cooling system in which temperature-controlled air flows into an underfloor space R2 and then flows back into the room, the loss of conveyance energy of the temperature-controlled air is reduced, and unevenness in temperature distribution in a floor section 2 is prevented. Reduce construction effort and improve workability. [Solution] The temperature-controlled air is generated by sucking air from the indoor space R1 above the floor part 2 into an air conditioner 55, and after the temperature-controlled air flows into the underfloor space R2 below the floor part 2, the indoor space R1 Return to The floor portion 2 includes a plurality of hollow steel joists 15 and a floor material 25 laid on the steel joists 15. A chamber 30 that allows temperature-controlled air from an air conditioner 55 to flow into the underfloor space R2 through a duct 50 is arranged across a plurality of steel joists 15, and allows the temperature-controlled air from the chamber 30 to flow directly into the steel joists 15. It is made to flow in from the inlet 19, and after the temperature-controlled air of the steel joist 15 is ejected from the ejection port 20 to the underfloor space R2, it is returned to the indoor space R1 from the recirculation port 28 of the flooring material 25. [Selection diagram] Figure 10

Description

The present invention relates to an indoor heating and cooling system and its heat transfer floor structure.

Conventionally, this type of indoor heating and cooling system sucks air from the indoor space into an air conditioner to generate temperature-controlled air at a predetermined temperature, and then flows the temperature-controlled air into the underfloor space through a duct to generate temperature-controlled air. After the floor is heated from below, the temperature-controlled air in the underfloor space is returned to the indoor space from the recirculation port in the floor, etc., and the indoor space is heated and cooled by cooling or heating the floor from the underfloor space. Things are known.

For example, in Patent Document 1, a plurality of similar hollow steel joists are arranged on a plurality of hollow steel joists that are structural members of the floor, and temperature-controlled air from an air conditioner is introduced into the chamber. After that, the temperature-controlled air is made to flow from the Ohiki steel to the upper joist steel, and from the outlet hole of the joist steel, the temperature-controlled air is blown out into the underfloor space so as to flow along the back surface of the flooring material. system is proposed.

Japanese Patent Application Publication No. 2010-112566

However, in the above-mentioned patent document 1, each Ohiki steel is connected to the chamber, and each joist steel is connected to each Ohiki steel, and the temperature-controlled air enters the Ohiki steel from the chamber. It flows to each joist steel, ejects from each joist steel into the space under the floor, travels around the space under the floor, and finally comes out into the indoor space. In this way, although the temperature-controlled air ultimately exits from the joist to the underfloor space, the presence of the large tension steel on the upstream side of the joist in the flow path of the temperature-controlled air prevents the temperature-controlled air from flowing. A large flow resistance occurs when the flow goes from the large joist steel to the joist steel with a smaller cross-sectional area. This poses a problem in that the temperature-conditioned air cannot move smoothly and its pressure decreases, resulting in an unavoidable loss of energy for transporting the conditioned air.

In addition, in the floor section, fewer Ohiki steel rods are used than joist steel, so the temperature-controlled air from the air conditioner passes through the chamber and is first introduced into the Ohiki steel. There also arises the problem that unevenness tends to occur in the temperature distribution.

Furthermore, since the structure allows temperature-controlled air to flow from the Ohiki steel to the joist steel, it is not only necessary to connect the chamber and the Ohiki steel, but also to create communication holes (openings) in both the Ohiki steel and the joist steel. It is also necessary to open them and align them so that there is no air leakage, and it is inevitable that the work of connecting the Ohiki steel and the joist steel is troublesome and takes time and effort.

The present invention has been made in view of the above points, and its purpose is to reduce the loss of energy for transporting temperature-controlled air by adding a device to the indoor heating and cooling system that circulates temperature-controlled air into the room after flowing it into the underfloor space. The purpose of this invention is to reduce the temperature distribution of the floor, prevent unevenness in the temperature distribution, and improve workability by reducing the time and effort required for construction.

In order to achieve the above object, this invention does not flow the temperature-controlled air from inside the chamber to the joist steel via the Ohiki steel, but by flowing the temperature-controlled air inside the chamber directly to the joist steel. The number of times the temperature-controlled air is divided into steel joists with a small cross-sectional area is reduced to one.

Specifically, the first aspect of the invention is to generate temperature-controlled air by sucking air from an indoor space above a floor in an air conditioner, and to flow the temperature-controlled air into an underfloor space below the floor through a duct. This applies to indoor air-conditioning and heating systems that are designed to return to the original indoor space.

The floor section includes a plurality of hollow steel joists that fixedly support the flooring material, and a plurality of large tension steels that are arranged orthogonally intersecting the joist steel and that place and support the joist steel. , the joist steel has a structure in which the inside of the joist steel does not communicate with the inside of the joist steel at the intersection with the joist steel. A chamber into which temperature-controlled air from the air conditioner flows into the underfloor space through a duct is arranged across the plurality of steel joists, and each steel joist directly receives the temperature-controlled air in the chamber. The chamber is equipped with an inlet for flowing into each steel joist, and an outlet for blowing out the temperature-controlled air in each steel joist into the underfloor space, and allows the temperature-controlled air in the chamber to flow only into each steel joist through the inlet. , characterized in that the temperature-controlled air in each of the steel joists is configured to be blown out from the outlet into the underfloor space and then returned to the indoor space. Note that the above-mentioned "chamber" does not refer to a space, but a space-forming body having a space inside.

In this first invention, the conditioned air generated by the air conditioner flows into the chamber through the duct, and from inside the chamber directly flows into each of the joist steels mounted and supported by the large steel beams. Flow in through the inlet. Next, the conditioned air in each steel joist is ejected from the jet outlet into the underfloor space so as to "lick" the flooring above, heating or cooling the flooring from below. Thereafter, the temperature-controlled air in the underfloor space is returned to the indoor space to heat or cool the indoor space.

In this way, even if a plurality of joist steels that support the joist steel are placed across the joist steel, the inside of the joist steel does not communicate with the inside of the joist steel at the intersection with the joist steel. Therefore, there is no such large steel in the flow path of temperature-controlled air from inside the chamber to each steel joist, and the temperature-controlled air in the chamber directly flows into each steel joist with a smaller cross-sectional area. As a result, the temperature-controlled air is diverted from the chamber with a large cross-sectional area to the steel joist with a small cross-sectional area only once, like when the temperature-controlled air goes from the chamber to the steel joist via the large-cross-sectional area. Large flow resistance no longer occurs. Therefore, the temperature-conditioned air moves smoothly, the pressure of the temperature-conditioned air becomes difficult to decrease, and loss of conveyance energy of the conditioned air can be avoided.

In addition, more joist steel is used than daihiki steel, and temperature-controlled air from the air conditioner is directly introduced into the large number of joist steel through the chamber, which improves the temperature distribution of the floor. It becomes difficult for unevenness to occur.

Furthermore, since the temperature-controlled air in the chamber flows directly only through the steel joists, all you have to do is open the outflow port in the chamber and the inlet port in the steel joist and connect them so that there is no air leakage. Construction will be completed. Therefore, like the conventional structure in which temperature-controlled air flows between the Ohiki steel and the Joist steel, connecting holes (openings) are made in both the Ohiki steel and each Joist steel, and they are connected. It is no longer necessary to match the parts so that there is no air leakage, making the work easier and improving workability.

A second invention is a joist connection having a hollow structure different from the large-length steel joist, in which the interiors of the plurality of joist steels are communicated with each other and temperature-controlled air is diffused between the joist steels in the indoor heating and cooling system of the first invention. A member is provided.

In this second invention, since the plurality of joist steels are connected to each other by a hollow joist connecting member different from the large joist steel , even if the joist steel has a small cross-sectional area or the joist steel has a long length, As a whole, it is possible to reduce the unevenness of temperature-controlled air.

A third invention is the indoor heating and cooling system according to the first invention, characterized in that the spout of each steel joist is provided at a corner of the upper surface in contact with the flooring.

In this third invention, the air outlet is provided at the corner of the upper surface that contacts the flooring of the thick joist steel, so that the temperature-controlled air that is blown out from the outlet into the underfloor space reliably hits the lower surface of the flooring. The air flows in the direction along the lower surface, and the temperature-controlled air efficiently heats or cools the flooring. In addition, since the spout is opened at the corner of the steel joist, the spout is not blocked by the flooring material, and the opening area of the spout is secured to stably blow out temperature-controlled air. be able to. Furthermore, the spout can be formed simply by notching the upper corner of the steel joist that comes into contact with the flooring material, making the machining easy.

A fourth invention is the indoor heating and cooling system according to the first invention, characterized in that a recirculation port for recirculating the temperature-controlled air in the underfloor space to the indoor space is opened in the floor material at a position opposite to the chamber. .

In the fourth invention, since the reflux port is formed in the floor, there is no need for a large-scale structure that would be required when the reflux port is formed in a portion other than the floor. In addition, since this reflux port opens into the floor material on the opposite side of the chamber, the distance from the chamber to the reflux port is longer, and the temperature-controlled air flows from inside the chamber through the inside of the steel joists. It is possible to secure a large length of the path from the outlet to the underfloor space via the spout and to the reflux port. Therefore, the temperature-controlled air can be uniformly flowed over the plurality of steel joists, and the unevenness of the temperature distribution in the floor can be reduced.

A fifth invention is the indoor heating and cooling system according to the first invention, characterized in that the chamber is supported by a steel joist.

In this fifth invention, the chamber and the steel joist into which the temperature-controlled air flows from the chamber can be placed close to each other, which further effectively reduces the loss of conveyance energy of the conditioned air and the unevenness of the temperature distribution. can be realized.

A sixth invention is the indoor heating and cooling system according to the first invention, in which each joist steel includes a joist steel body that opens downward, and a lower cover that partially closes the opening of the joist steel body. It is characterized by

In this sixth invention, the closed portion of the opening of the joist steel body that is closed by the lower cover becomes a temperature-controlled air flow path surrounded by the joist steel body and the lower cover with the lower cover as a flow path wall. The opening without the lower lid can serve as an inlet and communicate with the inside of the chamber. With this, it is possible to easily produce a steel joist having an inlet by using a steel joist main body that opens on the lower side. Furthermore, even if the position of the inlet connected to the chamber shifts at the construction site, the inlet can be changed simply by shifting the position of the lower cover, making it easy to deal with the change. Note that the spout is formed in the main body of the joist steel.

A seventh invention is the indoor heating and cooling system according to the first invention, characterized in that a plurality of chambers are provided.

In this seventh invention, since the plurality of chambers are connected to the joist steel, even if the temperature-controlled air flow inside the joist is insufficient due to the long length of the joist, the plurality of chambers can be connected to the joist steel. By introducing temperature-controlled air into the steel joists from within, a flow of temperature-controlled air can be ensured.

The eighth invention relates to a heat transfer floor structure, and in this heat transfer floor structure, a plurality of hollow steel joists are arranged on the floor of a room , and the joist steels are placed so as to intersect orthogonally to the joist steel. The joist steel has a structure in which the inside of the joist steel does not communicate with the inside of the joist steel at the intersection with the above-mentioned joist steel, and The underfloor space is provided with a chamber through which conditioned air from the air conditioner flows in through a duct, and each of the steel joists has an inlet that allows the temperature-conditioned air in the chamber to flow directly into each of the steel joists. , a spout for spouting the temperature-controlled air in each joist into the underfloor space, and a spout for causing the temperature-controlled air in the chamber to flow only into each joist through the inlet and discharging the temperature-controlled air in each joist. It is characterized by being configured so that it can be ejected from the air into the underfloor space. This eighth invention also provides the same effects as the first invention.

As explained above, according to the present invention, the indoor heating and cooling system allows temperature-controlled air generated by an air conditioner to flow into the underfloor space below the floor via a duct and then returns it to the indoor space above the floor. A chamber communicating with the duct is provided in the underfloor space, and a plurality of hollow steel joists having an inlet and an outlet in the floor are arranged to intersect with the steel joists, and the steel joists are placed and supported. Each joist steel has a structure in which the inside of the joist steel does not communicate with the inside of the joist steel at the intersection with the joist steel, and the inlet of each joist steel is connected to the chamber. In addition, the blow-off ports are arranged so as to communicate with the under-floor space, so that the temperature-controlled air in the chamber flows directly into only the steel joists and then blows out into the under-floor space. This allows the temperature-conditioned air to move smoothly from the inside of the chamber to the steel joists, reducing the loss of energy for conveying the conditioned air and the unevenness of the temperature distribution on the floor. In addition, all you have to do is open the outflow port in the chamber and the inflow port in the steel joist and align them to prevent air leakage, making the work easier and improving workability. can.

FIG. 1 is a plan view showing a floor structure in an indoor heating and cooling system according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing the floor structure. FIG. 3 is a perspective view of the floor structure viewed from a different direction from FIG. 2. FIG. FIG. 4 is a view corresponding to FIG. 3 showing a floor portion where flooring is applied to the floor structure. FIG. 5 is a perspective view showing the joist steel installed on the floor slab via the large steel joist. FIG. 6 is a sectional view showing the structure of the chamber. FIG. 7 is a view corresponding to FIG. 6 showing a first modification of the structure of the chamber. FIG. 8 is a view corresponding to FIG. 6 showing a second modification of the structure of the chamber. FIG. 9 is a perspective view showing the relationship between the chamber and the joist steel, which are arranged between the large tension steel beams. FIG. 10 is a sectional view taken along the line XX in FIG. FIG. 11 is an enlarged cross-sectional view showing the connecting portion between each steel joist and the chamber. FIG. 12 is a view corresponding to FIG. 11 showing a modification of the connecting portion between each joist and the chamber. FIG. 13 is an enlarged cross-sectional view of the steel joist. FIG. 14 is an exploded perspective view of the steel joist. FIG. 15 is a perspective view showing the connection structure of the joist connecting member to the joist steel, viewed from above. FIG. 16 is a perspective view showing the connecting structure of the joist connecting member to the joist steel, viewed from below. FIG. 17 is a view corresponding to FIG. 5 showing modification example 1 of the steel joist. FIG. 18 is a perspective view showing a second modification of the steel joist. FIG. 19 is a diagram corresponding to FIG. 1 showing the second embodiment.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of the embodiments is merely illustrative in nature and is in no way intended to limit the present invention, its applications, or its uses.

(Embodiment 1)
In FIGS. 1 to 4, 1 is a wall installed in a building such as a gymnasium, an indoor training facility, or a dance studio facility, and 2 is a rectangular floor within the wall 1, which is surrounded by the wall 1. The interior space of the building is partitioned by the floor 2 into an indoor space R1 (above-floor space) above the floor 2 and an under-floor space R2 below (see FIG. 6).

The floor section 2 includes a plurality of steel steel bars 10, 10, . It is supported on the top via a support stand 6. On top of these Ohiki Steel 10, 10,..., there are a plurality of steel joists 15, 15,..., which are larger than the Ohiki Steel 10, 10,..., so as to be perpendicular to the Ohiki Steel 10. The flooring material 25 is fixedly supported on the steel joists 15, 15, . . . . As shown in FIGS. 6 to 8, the flooring material 25 includes a subflooring material 26 and a floor finishing material 27 applied to the upper surface of the subflooring material 26. As shown in FIGS. In addition, when placing and fixing the steel joist 15 on the steel joist 10 and when constructing the flooring material 25 on the upper side of the steel joist 15, a method commonly used in the same technical field is used. Structures, fastening means, etc. are used.

As shown in FIG. 5, the support stand 5 has a support leg 6 fixed to the floor slab SL with an anchor bolt (not shown), and is screwed to the upper part of the support leg 6 so that the height can be adjusted. It comprises a support bolt 7 and a large undercarriage 8 (shown in FIGS. 6 to 8) connected to the upper end of the support bolt 7, and a large tension steel 10 is placed on the large undercarriage 8 and fixed immovably. . The support stand 5 is arranged at the intersection with every few joist steels 15, 15, .

Each of the above-mentioned large pull steels 10 is a long steel member made of lip steel (C channel steel) having a substantially C-shaped (U-shaped) cross section. The lip steel is one in which one of the four circumferential walls is open over the entire length and inward flange parts 10a, 10a are formed on both sides of the open opening. The drawing steel 10 is fixed on the support stand 5 with the open opening facing downward. Incidentally, the large steel 10 may be a rectangular hollow steel.

As shown in FIGS. 13 and 14, each of the steel joists 15 is made of a hollow steel elongated member, and an air passage is formed inside thereof. Specifically, the joist steel 15 includes a joist steel main body 16 and a lower cover 17. The joist steel main body 16 is made of hat steel having a substantially hat-shaped cross section, and is opened downward throughout its length, and flanges 16a, 16a extending horizontally outward are formed on both sides of the opening. There is. The width of the joist steel body 16 is, for example, 62 mm, and the height is, for example, 40 mm.

On the other hand, the lower cover 17 is a long steel plate having a width larger than the dimension between the tips of both flanges 16a, 16a of the joist steel body 16. For example, the lower cover 17 has a joist steel body 16 are integrally fixed to the joist steel body 16 by folding back the ends in the width direction of the lower cover 17 in a stacked state and sandwiching the tips of both flanges of the joist steel body 16. The tip of the flange portion 16a of the joist steel body 16 is airtightly sandwiched between the folded portions of the lower cover 17, so that the joist steel body 16 and the lower cover 17 form a hollow structure of the joist steel 15. As will be described later, the lower cover 17 is not provided over the entire length of the joist steel body 16, and there is a portion of the joist steel body 16 where the lower cover 17 is not provided, and the missing portion covers the joist. Steel 15 is opened to form an inlet 19. Further, both longitudinal ends of each steel joist 15 are hermetically closed with closing members 21 (see FIG. 9).

As shown in FIGS. 1 to 4, a chamber 30 with heat insulation properties located in the underfloor space R2 is installed on one side (the upper side in FIG. 1) of the two opposing sides of the floor 2. There is. This chamber 30 is an elongated box-shaped thing with an end and a length corresponding to one side of the floor part 2, and is located between a pair of adjacent large steel bars 10, 10 located on one side of the floor part 2. The plurality of joist steels 15, 15, . The inside of the chamber 30 is an air flow path, and the cross-sectional area of the chamber 30 (more specifically, the cross-sectional area of the internal air flow path) is much larger than the cross-sectional area of each joist 15. set to the value.

As shown in FIGS. 6 and 9 to 12, the chamber 30 includes a chamber body 31 that opens upward, and a plurality of lids 32, 32, . . . that intermittently (partially) close the opening. There is. The chamber main body 31 is made of a 20 mm thick noncombustible plate material made of a heat insulating material such as polyisocyanate foam and integrated with aluminum foil bonded to both sides.The chamber body 31 has an elongated rectangular box structure with an opening on the upper side, and is made of a horizontally It has a lower wall portion that extends to the lower wall portion, and side wall portions that stand up from the four peripheral edges of the lower wall portion. The chamber main body 31 is a long box with an upward opening, but the openings on both sides of each of the steel joists 15 are closed by the lids 32, 32, . . . . Each lid portion 32 is a rectangular plate material made of, for example, a Keikal board, and one pair of side portions of the two pairs of side portions facing each other, that is, the side portion in the direction along the large steel plate 10. The chamber body 31 is integrally fixed to the upper surface of the side wall portion of the chamber body 31 in an airtight manner with adhesive or screws. Further, as shown in FIG. 11, in each lid portion 32, the side portions of the other pair of the two pairs of side portions facing each other, that is, the side portions in the direction along the joist steel 15 are as follows: It is arranged above the flange portion 16a of the joist steel main body 16 in the joist steel 15 so as to overlap with the flange portion 16a, and is fixed to the flange portion 16a in an airtight manner by screws V passing through the lid portion 32 and the flange portion 16a. . As a result, the chamber 30 including the chamber body 31 is airtightly fixed and suspended from the steel joists 15 by the lids 32 that are integrated with the chamber body 31. In this way, the upper opening of the chamber body 31 in the portion located between the joist steels 15, 15 is hermetically closed with the lid 32, and only the portion corresponding to each joist 15 does not have the lid 32. An outflow port 34 is formed by the opening in the portion where the lid portion 32 is not provided. Further, the longitudinal end portion of the chamber 30 protrudes beyond the position of the steel joist 15, and the opening of the protruding portion is hermetically closed by the lid portion 32. One side of the lid portion 32 is fixed to the flange portion 16a of the joist steel main body 16 of the joist steel 15 as described above.

Further, as shown in FIG. 6, the chamber 30 is fixed to the sidewall 10 of the chamber body 31 via a long packing material 37 extending along the sidewall 10. As shown in FIG.

When constructing the chamber 30 having the above structure between a pair of Ohiki steel 10, 10, for example, after fixing the packing material 37 to each Ohiki steel 10, the chamber body 31 having a U-shaped cross section is attached to the packing material 37. Fix it on the side wall with screws, etc., and close the gap between the fixed parts with a sealing material such as caulking material or airtight tape. As a result, the chamber body 31 is fixed to the large steel 10. After that, the lid part 32 is placed between the joist steels 15, 15, and placed so that its opposing side parts overlap the flange part 16a of the joist steel body 16, and is fixed with screws V at the overlapping part, and the lid The remaining opposing side portions of the portion 32 may be fixed to the upper surface of the side wall portion of the chamber body 31.

In addition, when the chamber 30 is airtightly fixed to the steel joist 15 and suspended and supported, a modification of the structure shown in FIG. 12 may be employed in addition to the structure shown in FIG. 11. In this modification, a chamber 30 is formed by fixing a lid part 32 to a predetermined position of a chamber body 31, and a flange part 16a of a joist steel body 16 in a joist steel 15 is stacked on the lid part 32 of the chamber 30 from above. The lid portion 32 is located below the flange portion 16a of the joist steel body 16, contrary to the structure shown in FIG. When constructing this structure, the chamber 30 is formed by fixing the lid part 32 to the chamber body 31 with screws or adhesive in advance, and after fixing the packing material 37 to the Ohiki steel 10, the packing material 37 is The chamber 30 is fixed at the side wall portion of the chamber body 31 with screws or the like, and the gap at the fixed portion is closed with caulking material or airtight tape. Thereafter, the flange portion 16a of the joist steel body 16 is placed on the lid portion 32 and fixed with screws V.

In either of the structures shown in FIGS. 11 and 12, the chamber 30 is a communicating portion between each outlet 34, which is a communicating portion of each joist 15 to an inlet 19, which will be described later, and the vertical duct 50. There are no openings or gaps except for a certain entrance, and the structure as a whole is airtight.

Further, the structure of the chamber 30 is not limited to that shown in FIG. 6, and, for example, Modification 1 and Modification 2 shown in FIGS. 7 and 8, respectively, may be adopted. In modification example 1 shown in FIG. 7, a thin airtight sheet with a thickness of 0.4 mm, for example, is formed into an elongated bag body that opens upward, and the elongated bag body is used as the chamber body 31. . The upper end of this bag-shaped chamber body 31 is airtightly attached to a runner 38 (L-shaped in cross section) which is screwed to the flange portion 16a (the part including the lower lid 17) of the joist steel body 16 of the joist steel 15. The runner 38 is a long member that extends along the steel bar 10. As a result, the chamber main body 31 is fixed to the steel joist 15 and suspended.

In the second modification shown in FIG. 8, a noncombustible plate material with a thickness of 20 mm, which is made of a heat insulating material such as polyisocyanate foam and has aluminum foil bonded to both sides, is used as the side walls around the four circumferences of the chamber body 31, and a large The upper end of each side wall portion (noncombustible plate material) extending along the steel 10 is fitted into a runner 38 having a U-shaped cross section and fixed to the steel joist 15. The runner 38 is a long one that extends along the steel joist 10, and contains a sealer 39 therein, and the sealer 39 connects the side wall of the chamber body 31 to the steel joist 15 in an airtight manner. (Incidentally, the runner 38 having the sealer 39 inside may be fixed to the Ohiki steel 10 in this way). On the other hand, the lower end of the side wall portion is fitted into a floor runner 40 having a U-shaped cross section fixed to the floor slab SL, and is airtightly sealed from the floor slab SL. This floor-side runner 40 is also a long one that extends along the large tension steel 10. As a result, the lower wall portion of the chamber main body 31 is constituted by the floor slab SL. In this second modification, the floor runner 40 is directly fixed to the floor slab SL, but in addition, for example, a wooden frame with a rectangular cross section is fixed to the floor slab SL using adhesive, anchor bolts, etc. The floor runner 40 can also be fixed to the frame material by screwing or the like.

The lid portion 32 of the chamber 30 of the above Modifications 1 and 2 is the same as the chamber 30 shown in FIG. 6 .

Furthermore, although not shown, the chamber 30 can also be constructed of a rectangular, heat-insulating cylinder having a closed cross-sectional structure and having upper and lower walls and both side walls closed. In order to form the outlet 34 in the chamber 30 of this cylindrical body, an opening may be cut into a portion of the upper wall of the cylindrical body corresponding to the steel joist 15 to form the outlet 34. However, with this structure, when attaching the chamber 30 to the steel joist 15, it is necessary to align the outlet 34 with the inlet 19 of the steel joist 15 and install it, which makes the installation work troublesome. On the other hand, when the chamber 30 is composed of the chamber body 31 and the lid 32 as described above, the opening between the joists 15 and 15 is sealed by the lid 32 after the chamber body 31 is attached to the joist 15. This makes construction easier than when aligning the outlet 34 formed by cutting and the steel joist 15.

One end in the length direction of the chamber 30 (the left end in FIG. 1) protrudes beyond the floor 2, and this protruding part does not have a lid 32 and opens upward. It is airtightly connected to the lower end (downstream end). On the other hand, the other longitudinal end of the chamber 30 is closed. The vertical duct 50 extends vertically from the side of the floor 2, and its upper end (upstream end) sucks air from the indoor space R1 and cools or heats it to generate temperature-controlled air at a predetermined temperature. The temperature-controlled air generated by the air conditioner 55 is caused to flow into the chamber 30 from one end in the longitudinal direction through the vertical duct 50. The air conditioner 55 is installed, for example, in the attic of a building.

On the other hand, as shown in FIGS. 10 and 11, in each of the steel joists 15, the portion corresponding to the chamber 30 (the end overlapping with the chamber 30) does not have the lower lid 17, and the missing portion of the lower lid 17 is open. An inlet 19 is formed. When each joist steel 15 is viewed from below, the flange portions 16a, 16a of the joist steel body 16 are exposed in the missing portion of the lower cover 17, and the inlet port 19 is opened between the flange portions 16a, 16a. The inlet 19 communicates with the outlet 34 of the chamber 30 in an airtight manner to prevent air leakage to the outside. With this, the temperature-controlled air that has flowed into the chamber 30 flows into each of the steel joists 15 located above from one end in the length direction through the outlet 34 of the chamber 30 and the inlet 19 of each steel joist 15. It is supposed to be done.

That is, since the vertical duct 50 cannot be directly connected to each of the plurality of steel joists 15, 15, . . . , the temperature-controlled air is distributed from the duct 50 to the steel joists 15, 15, . . . via the chamber 30. The role of the chamber 30 is to distribute temperature-controlled air from the duct 50 to each of the joists 15.

As shown in FIGS. 9 and 13, in each of the joist steels 15, at the corners on both sides in the width direction of the upper wall portion of the joist steel main body 16, there are provided holes for blowing out the temperature-controlled air in the joist steel 15 into the underfloor space R2. A plurality of jet ports 20, 20, . . . are opened so as to communicate between the inside and outside of the joist steel 15. Each spout 20 is formed at a corner of the upper surface of the joist steel main body 16 in contact with the upper flooring 25 so as to span the upper wall and the side wall. Each spout 20 is formed into a rectangular opening by, for example, cutting a corner of the joist steel body 16 into a rectangular shape by 6 mm in the upper wall portion and by 4 mm in the side wall portion. The dimension along the length of the steel joist 15 of each spout 20 is, for example, 50 mm.

Since the flooring material 26 of the flooring material 25 is placed in contact with the upper wall portion of each joist steel 15, most of the opening portion of the upper wall portion of the spout 20 is blocked by the flooring material 25. The temperature-controlled air in the joist steel 15 is blown out into the underfloor space R2 from the opening in the side wall that is not blocked by the flooring 25 among the blow-off ports 20, and the temperature-controlled air blown out from the blow-off ports 20 is blown out into the floor space R2. The spray is sprayed to ensure that it hits the bottom surface of the flooring material 25, and then flows in the direction along the bottom surface of the flooring material 25. Since the spout 20 can be formed by simply cutting out the corner of the joist steel body 16 in this way, there is an advantage that the machining thereof is easy.

The plurality of jet ports 20, 20, . . . are arranged at a corner of the upper wall of the steel joist 15 at regular intervals in the length direction of the steel joist 15. The positions of the spout ports 20 , 20 formed at one corner and the other corner in the width direction of the upper wall of the steel joist 15 are not opposite to each other in the width direction of the steel joist 15 , but are located at the length of the steel joist 15 . They are shifted by a fixed dimension in the width direction, and the spout ports 20, 20, . . . of the entire joist steel 15 are arranged in a so-called staggered arrangement. Then, the temperature-controlled air flowing from inside the chamber 30 into one end in the length direction of each of the upper steel joists 15 heads toward the other end in the length direction within each of the steel joists 15, and along the way, the air flows through each of the above-mentioned jet ports 20. Since the plurality of air outlets 20, 20, ... are arranged in a staggered manner, the temperature-controlled air blown out from each air outlet 20 is blown out from the air outlet 20 of the other steel joist 15. to avoid interference with the flow of temperature-controlled air.

As shown in FIG. 4 (indicated by imaginary lines in FIGS. 1 to 3), the other side of the floor 2 opposite to the chamber 30 has an underfloor space R2 below the floor 2. A plurality of reflux ports 28, 28, . . . , which communicate with the indoor space R1 on the upper side, are arranged and opened in parallel with the chamber 30 and the steel bar 10. Each reflux port 28 has an elongated rectangular shape extending parallel to the chamber 30 and the large steel 10, and passes through the floor sub-material 26 and the floor finishing material 27 of the floor section 2, and each reflux port 28 has a grill 28a. is embedded. The reflux ports 28, 28, ... are arranged between the pair of large steel bars 10, 10 located on the other side of the floor 2, and each of the reflux ports 28 is not blocked by objects installed in the indoor space R1. The temperature-controlled air blown into the underfloor space R2 from the outlet ports 20, 20, . . . of the plurality of steel joists 15, 15, . , . . . so as to circulate the water back into the indoor space R1.

With the above structure, the air conditioner 55 sucks air from the indoor space R1 above the floor 2 to generate temperature-controlled air, supplies the temperature-controlled air into the chamber 30, and controls the temperature inside the chamber 30. Air is allowed to flow into each of the steel joists 15 through its inlet 19, and the temperature-controlled air in each of the steel joists 15 is blown out into the underfloor space R2 from the blow-off ports 20, 20, . An indoor heating and cooling system is configured in which the air flows back into the indoor space R1 from 25 return ports 28, 28, . . . .

Further, in the underfloor space R2, there is a chamber 30 into which conditioned air from an air conditioner 55 flows through a duct 50, and in the floor part 2, there are a plurality of hollow steel joists 15, 15, ... and the joists. A floor material 25 laid on the steel joists 15, 15, . A heat transfer floor structure is configured in which the temperature-controlled air in each of the steel joists 15 is blown out from the jet ports 20 into the underfloor space R2.

Furthermore, as mentioned above, between the chamber 30 located on one side of the floor part 2 and the reflux ports 28, 28, . are arranged to intersect with a plurality of steel joists 15, 15, . This joist connecting member 44 connects the insides of the joist steels 15, 15, ... with each other at the intermediate portion in the longitudinal direction and diffuses temperature-controlled air between the joist steels 15. ,... are arranged so as to overlap each of the steel joists 15 from below.

As shown in FIGS. 15 and 16, the joist connecting member 44 is made of a hollow steel elongate member like the joist steel 15, and has an air passage formed therein. Specifically, the joist connecting member 44 has a structure in which the joist steel 15 is turned upside down, and includes a connecting member main body 45 and an upper lid 46. The connecting member main body 45 is made of hat steel, has an opening upwardly over its entire length, and has flanges 45a, 45a extending horizontally outward on both sides of the opening. The upper lid 46 partially closes the upper opening of the connecting member body 45, and the connection structure between the upper lid 46 and the connecting member body 45 is the connection between the joist steel body 16 and the lower lid 17 in the joist steel 15. The structure is the same (see FIGS. 13 and 14).

In the joist connecting member 44, there is no upper cover 46 in the part corresponding to each joist steel 15 (the part overlapping with each joist steel 15), and the missing part of the upper cover 46 is opened and a connecting member side communication port (not shown) is provided. ) is formed. When the joist connecting member 44 is viewed from above, the flange portions 45a, 45a of the connecting member main body 45 are exposed in the missing portion of the upper lid 46, and a connecting member side communication port is opened between the two flange portions 45a, 45a. There is. Further, in each joist steel 15, the portion overlapping with the joist connecting member 44 does not have the lower lid 17, similarly to the overlapping portion with the chamber 30, and a joist side communication port (not shown) is opened. The joist side communication port of each joist steel 15 and the connection member side communication port of the joist connection member 44 are connected to each other in an airtight manner, and this connection structure is similar to the connection structure between each joist steel 15 and the chamber 30. The same is true. With such a connection structure, the plurality of steel joists 15, 15, ... are connected to each other at the middle part in the longitudinal direction by the joist connecting member 44, and the temperature-controlled air flowing through the steel joists 15 connects with other steel joists on the way. 15, the pressure of the temperature-controlled air in the plurality of steel joists 15, 15, ... is equalized, and the temperature-controlled air is distributed from the outlet 20 of each steel joist 15 to the entire floor 2. I try to make it spray evenly.

Openings at both longitudinal ends (edges) of the joist connecting member 44 are closed by closing members 47 . Further, although not shown, the joist connecting member 44 is supported by the support stand 5 on the floor slab SL in the same way as the large pull steel 10 at a position overlapping each of the joist steels 15. Note that it is preferable that the joist connecting member 44 be set, for example, at each position where the length of the joist steel 15 exceeds a certain length. Therefore, the number of installed joist connecting members 44 may be plural.

As described above, in the indoor heating and cooling system and the heat transfer floor structure of this embodiment, the air in the indoor space R1 is sucked into the air conditioner 55 and cooled or heated, so that the air conditioner 55 uses the conditioned air at a predetermined temperature. is generated, and this conditioned air is discharged from the air conditioner 55 to the upstream end of the vertical duct 50. The conditioned air discharged into the vertical duct 50 flows from one end into the chamber 30 located in the underfloor space R2 on one side of the floor 2 from the downstream end of the duct 50, and flows inside the chamber 30 toward the other end. It flows. Above this chamber 30, one end portion of a plurality of steel joists 15, 15, . Since these are in communication with each other, the temperature-controlled air flowing inside the chamber 30 toward the other end flows from the outlet 34 through the inlet 19 of each steel joist 15 and into the steel joist 15. The temperature-controlled air that has flowed into each of the joist steels 15 flows inside the joist steel 15 toward the other end, and before reaching the other end, a large number of air outlets open at the top of each of the joist steels 15 are formed. 20, 20, ... and blows toward the lower surface of the flooring material 25, flows as if to "lick" the flooring material 25, and this temperature-controlled air contacts the lower surface of the flooring material 25 to maintain a constant temperature. An air layer is formed. The floor material 25 onto which the temperature-controlled air is blown in this manner is cooled or heated from the lower surface by the temperature of the temperature-controlled air layer, and thereby the indoor space R1 above the floor section 2 is cooled or heated from the floor section 2. The temperature-controlled air blown into the indoor space R1 from each joist steel 15 gathers in the underfloor space R2 on the other side of the floor part 2, and is returned to the indoor space R1 from the return ports 28, 28, . . . opened in the flooring 25. The air is sucked into the air conditioner 55 again from the indoor space R1. Thereafter, the same flow is repeated.

Therefore, in this embodiment, as described above, temperature-controlled air flows directly from inside the chamber 30 into each of the joists 15 having a smaller cross-sectional area. In other words, the flow is diverted from the chamber 30 having a large cross-sectional area to each of the joists 15 having a small cross-sectional area only once. That is, unlike the conventional case, there is no large pull steel in the flow path of the temperature-controlled air from the inside of the chamber 30 to each of the joists 15, and the large flow resistance of the temperature-controlled air due to the large pull steel does not occur. As a result, the temperature-controlled air flowing through the steel joists 15 moves smoothly, the pressure of the temperature-controlled air becomes difficult to decrease, and loss of conveyance energy of the conditioned air can be avoided.

Moreover, since the plurality of joist steels 15, 15, ... are connected by the joist connection member 44 having a hollow structure at an intermediate position in the length direction, the insides of these joist steels 15, 15, ... are connected to each other by the joist connection member 44. The temperature-controlled air is diffused between the steel joists 15, 15, . . . by communicating with each other. As a result, even if the steel joists 15, 15, .

Since the recirculation ports 28, 28, . . . for recirculating the temperature-controlled air from the underfloor space R2 to the indoor space R1 are open in the flooring 25, the recirculation ports 28 are formed in other parts than the floor part 2. A large-scale structure as in the case is not required.

In addition, since the reflux port 28 is formed on the opposite side of the floor material 25 from the chamber 30, the distance from the chamber 30 to the reflux port 28 becomes longer, and the temperature-controlled air flows from the chamber 30 to the joist steel 15. It is possible to ensure a large length of the stroke from flowing through the inside of the water to exiting to the underfloor space R2 through the jet ports 20, 20, . . . and reaching the reflux port 28. This allows the temperature-controlled air to flow evenly throughout the plurality of steel joists 15, 15, .

In addition, the number of joist steels 15, 15, ... is used more than the large number of joist steels 10, 10, ..., and the temperature-controlled air in the chamber 30 is introduced into the large number of joist steels 15, 15, .... . As the temperature-controlled air flows through the large number of steel joists 15, 15, . . . , it becomes difficult for the temperature distribution of the floor 2 to become uneven.

Furthermore, since the temperature-controlled air in the chamber 30 flows directly into each steel joist 15, an outlet 34 is opened in the chamber 30, and an inlet 19 is opened in each steel joist 15 to prevent air leakage. The construction is completed by matching and connecting. That is, like the conventional structure in which temperature-controlled air flows between the large pull steel and the joist steel 15, communication holes are made in both the large pull steel and each joist steel 15 to prevent air leakage. There is no need to match the construction so that there is no problem. As a result, construction becomes easier and construction efficiency improves.

Further, in each of the joist steels 15, a plurality of jet ports 20, 20, . As a result, the temperature-controlled air blown into the underfloor space R2 from each outlet 20 reliably hits the lower surface of the flooring 25 and then flows in the direction along the lower surface, causing the flooring 25 to be heated by the temperature-controlled air. Alternatively, cooling can be performed efficiently.

In addition, since each outlet 20 opens at the corner of the steel joist 15, the outlet 20 is not blocked by the flooring material 25, and the opening area of the outlet 20 is secured to allow temperature-controlled air to flow through the outlet. Not only can the jetting be ensured, but also the spout 20 can be formed simply by notching the upper corner of the steel joist 15 in contact with the flooring material 26, and the machining can be easily performed. . That is, compared to the case where holes are formed specifically in the upper part of the side wall part of the steel joist 15, it is easier to cut out the upper surface corners.

Moreover, each joist steel body 15 is composed of a joist steel body 16 made of hat steel and opened downward, and a lower cover 17 that partially closes the opening of the joist steel body 16. The closed portion of the opening that is closed by the lower lid 17 is a temperature-controlled air flow path surrounded by the lower lid 17 and the joist steel body 16 with the lower lid 17 acting as a flow path wall, The opening portion can serve as an inlet 19 and communicate with the inside of the chamber 30 . With this, the steel joist 15 having the inlet 19 can be easily produced by using the steel joist main body 16 that opens downward. Furthermore, even if the position of the inlet 19 that connects to the outlet 34 of the chamber 30 shifts at the construction site, the inlet 19 can be changed by simply shifting the position of the lower cover 17, making it easy to handle the change. can do.

Furthermore, since the chamber 30 is supported by the steel joist 15 at its upper part, the chamber 30 and the steel joist 15 into which the temperature-conditioned air flows from inside the chamber 30 can be disposed close to each other, and the air-conditioned air It is possible to more effectively reduce the loss of transport energy and the unevenness of temperature distribution.

Each of the above-mentioned joist steels 15 has a structure consisting of a joist steel main body 16 made of hat steel and a lower cover 17 that partially closes the lower opening thereof, as shown in FIGS. 17 and 18. (The same parts of the steel joists 15 will be described with the same reference numerals).

FIG. 17 shows a first modification of the steel joist 15, in which the steel joist 15 is shown mounted and fixed on the large pull steel 10 on the support stand 5. The steel joist 15 of Modification Example 1 uses a square pipe with a rectangular cross section, and has spout ports 20, 20,... cut out in both corners of its upper wall in the same way as above. . In addition, in the lower wall portion of the steel joist 15 that overlaps with the chamber 30, a rectangular inlet 19 (not shown in FIG. 17) corresponding to the outlet 34 of the chamber 30 is formed by drilling a hole. It's open. In this case, it is necessary to drill the inlet 19 and the outlet 20 in the steel joist 15 made of square pipe.

FIG. 18 shows a second modification of the joist steel 15, which is a joist steel made of lip steel (C channel steel) that is open on the upper side and has inward flange portions 16b, 16b on both sides of the opening. It consists of a main body 16 and an upper lid 18 made of a resin plate that airtightly closes the upper opening of the joist steel main body 16. Engaging portions 18a, 18a are formed on the lower surface in the width direction of the upper lid 18, and are engaged with both flange portions 16b, 16b of the joist steel body 16 by sandwiching them therebetween. Further, on both sides of the upper lid 18 in the width direction, spout ports 20, 20, . . . are formed by cutting out the upper lid 18 in a U-shape. In this modification 2 as well, a rectangular inlet 19 (not shown in FIG. 18) is opened in the lower wall portion of the joist steel main body 16 in a portion overlapping with the chamber 30 by drilling.

Both of these steel joists 15 of Modifications 1 and 2 can provide the same effects as the steel joists 15 of Embodiment 1.

(Embodiment 2)
FIG. 19 shows a second embodiment (the same parts as in the first embodiment are given the same reference numerals and detailed explanation thereof is omitted), in which the number of chambers 30 installed is increased.

In this embodiment, the chambers 30, 30 are installed between a pair of adjacent large steel bars 10, 10 located near the opposite ends of the floor part 2, and the number of installed chambers 30 is two. It has become.

One end of each chamber 30 is airtightly connected to a horizontal duct 51 extending horizontally in the underfloor space R2, and one longitudinal end of this horizontal duct 51 is airtightly connected to the lower end (downstream end) of the vertical duct 50. The other end is closed.

Each chamber 30 intersects a plurality of steel joists 15, 15, ... at the end in the length direction of each steel joist 15, and as in the first embodiment, an outlet 34 is formed at each intersection, Each outlet 34 is airtightly connected to an inlet 19 located at both longitudinal ends of each steel joist 15 . As a result, the temperature-controlled air that has flowed into the chambers 30, 30 on both sides through the horizontal duct 51 flows from inside both chambers 30, 30 into the portions of each joist 15 near both ends in the length direction, and the joist 15 Most of the temperature-controlled air flows toward the center in the length direction, and the rest flows toward both lengthwise ends of the steel joist 15, during which time it is blown out into the underfloor space R2 from the blow-off ports 20, 20, . . . It looks like this.

In addition, a plurality of return ports 28 opening into the floor material 25 of the floor section 2 are formed in the floor material 25 at the end opposite to the horizontal duct 51 so as to be parallel to the joist steel 15. . Note that the joist connecting member 44 is not provided.

In this embodiment, the other configurations are the same as in the first embodiment. Therefore, the same effects as in the first embodiment can be obtained in this embodiment as well.

In particular, in this second embodiment, since temperature-controlled air is caused to flow into the same one steel joist 15 from inside a plurality of chambers 30, 30, the area of the floor section 2 is large, and the length of the steel joist 15 is correspondingly large. This is effective when the flow of temperature-controlled air inside the steel joist 15 is insufficient due to the length of the steel joist 15. By introducing temperature-controlled air into the steel joist 15 from within the plurality of chambers 30, 30, the temperature-controlled air can be It is possible to ensure the flow of

Note that the number of installed chambers 30 may be three or more. Further, the plurality of chambers 30, 30, . . . can be installed in the middle portion of the floor portion 2 in addition to both end portions thereof. Alternatively, the plurality of steel joists 15, 15, . . . may be divided into a plurality of groups, and the chamber 30 may be provided for each group. That is, if the flow of temperature-controlled air inside the steel joists 15 is insufficient due to the length or arrangement of the steel joists 15, temperature-controlled air from the chamber 30 may be introduced into the middle of the steel joists 15.

(Other embodiments)
In the above embodiment, the large tension steel 10 is provided only to receive the joist steel 15, but this large tension steel 10 is made into a hollow closed structure similar to the joist connection member 44, and the inside is made into an air flow path. The inside of the large pull steel 10 may be communicated with the joist steel 15, and the temperature-controlled air inside the steel joist 15 may be made to flow into the large pull steel 10. ). The large pull steel 10 is perpendicular to the joist steel 15, and by communicating the inside of the joist steel 15, the large pull steel 10 plays a role of equalizing the pressure between the joist steels 15 in the same way as the joist connecting member 44. will be able to fulfill the following. In that case, unlike the joist connection member 44, the end (small end) of the Ohiki steel 10 is open, and the temperature-controlled air flowing into the Ohiki steel 10 flows through the opening at the end. What is necessary is to make it appear in the underfloor space R2.

INDUSTRIAL APPLICABILITY The present invention is extremely useful in the field of indoor heating and cooling systems, as it can reduce loss of energy for transporting temperature-controlled air and unevenness in temperature distribution on the floor, and improve workability. Probability is high.

R1 Indoor space R2 Under-floor space 2 Floor section 10 Large pull steel 15 Joist steel 16 Joist steel body 17 Lower cover 19 Inflow port 20 Spout port 25 Flooring material 28 Reflux port 30 Chamber 31 Chamber body 32 Cover section 34 Outflow port 44 Joist connection member 50 Vertical duct 55 Air conditioner

Claims (8)

In an air conditioner, air from the indoor space above the floor is sucked in to generate temperature-controlled air, and the temperature-controlled air is flowed into the underfloor space below the floor via a duct and then returned to the original indoor space. An indoor heating and cooling system that
The floor section includes a plurality of hollow steel joists that fixedly support the flooring material, and a plurality of large tension steels that are arranged orthogonally intersecting the joist steel and that place and support the joist steel. ,
The above-mentioned joist steel has a structure in which the inside of the joist steel does not communicate with the inside of the joist steel at the intersection with the above-mentioned Ohiki steel,
A chamber into which temperature-controlled air from the air conditioner flows into the underfloor space through a duct is arranged across the plurality of steel joists,
Each of the steel joists includes an inlet that allows temperature-controlled air in the chamber to directly flow into each steel joist, and an outlet that blows out the temperature-controlled air in each steel joist into the underfloor space,
The temperature-controlled air in the chamber is configured to flow only into each of the steel joists through an inlet, and the temperature-controlled air in each of the steel joists is blown out from the outlet into the underfloor space and then returned to the indoor space. An indoor heating and cooling system characterized by: In the indoor heating and cooling system according to claim 1,
An indoor air conditioning/heating system characterized by being provided with a joist connecting member having a hollow structure different from a large joist, which communicates the insides of a plurality of joist steels and diffuses temperature-controlled air between the joist steels . In the indoor heating and cooling system according to claim 1,
An indoor heating and cooling system characterized in that the spout of each steel joist is provided at the corner of the upper surface that comes into contact with the flooring. In the indoor heating and cooling system according to claim 1,
An indoor heating and cooling system characterized in that a recirculation port for circulating temperature-controlled air from the underfloor space back into the indoor space is opened on the opposite side of the floor material from the chamber. In the indoor heating and cooling system according to claim 1,
An indoor heating and cooling system characterized by the chamber being supported by steel joists. In the indoor heating and cooling system according to claim 1,
An indoor heating and cooling system characterized in that each steel joist includes a main body of the steel joist that opens downward, and a lower cover that partially closes the opening of the steel main body. In the indoor heating and cooling system according to claim 1,
An indoor heating and cooling system characterized by having multiple chambers. A plurality of hollow steel joists are provided on the floor of the room, and a plurality of large tension steels are arranged orthogonally intersecting the steel joists and support the steel joists ,
The above-mentioned joist steel has a structure in which the inside of the joist steel does not communicate with the inside of the joist steel at the intersection with the above-mentioned Ohiki steel,
A chamber is provided in the underfloor space below the floor to allow conditioned air from the air conditioner to flow in through a duct.
Each of the steel joists includes an inlet that allows temperature-controlled air in the chamber to directly flow into each steel joist, and an outlet that blows out the temperature-controlled air in each steel joist into the underfloor space,
A heat transfer device characterized in that the temperature-controlled air in the chamber is made to flow only into each of the steel joists through an inlet, and the temperature-controlled air in each of the steel joists is blown out from the outlet into the underfloor space. floor structure.