JP5164451B2 - Synthetic hollow floor structure and air conditioning system - Google Patents

Description

  The present invention relates to a synthetic hollow floor structure and an air conditioning system. More specifically, the present invention relates to a synthetic hollow floor structure having a configuration in which upper and lower flange concrete and folded plate-shaped bent steel plates are integrated, and such a configuration. The present invention relates to an air conditioning system using a floor structure.

  Hollow floor structures such as a hollow concrete slab such as a void slab having a hollow portion or a void portion, and a composite synthetic floor slab in which a bent steel plate and a concrete plate are integrated are known. The hollow part of such a floor structure is separated and concealed from the indoor environment and the external environment, and can be used for building equipment piping, electrical / communication wiring, air-conditioned air conveyance, etc. From the viewpoint of rationalization and labor saving of building equipment construction, various types of usage on building equipment have been proposed in the past regarding this type of hollow portion.

  For example, as a typical past proposal, there is a utilization form of a hollow portion in which a cylindrical hollow portion or a rectangular hollow portion of a hollow concrete slab such as a void slab is used as an air conditioning duct or a piping / wiring space. Hollow concrete slabs have a relatively low porosity and can be expected to have a sensible heat storage effect on the body (concrete). Therefore, air-conditioned air heated or cooled by using surplus heat during midnight power or low-load operation is hollow. Air conditioning systems have been proposed in the past that are configured to store the sensible heat of the air in the concrete frame by passing through the air, and to transfer the stored cold or heat to the conditioned air during high-load operation or power peak. ing. In this type of air conditioning system, the latent heat storage material is arranged in the air conditioning duct or embedded in the concrete adjacent to the air duct so that the sensible heat storage effect of the frame is supplemented by latent heat storage. Things are known.

  As another use form, a hollow floor structure is constructed by combining PCa (precast concrete) board and cast-in-place concrete, and the hollow portion of the floor structure is used as an air conditioning duct or used as piping / wiring space. This is described in JP-A-1-203549.

As a floor structure of another configuration that uses the hollow part for applications such as air conditioning ducts, a folded steel plate is placed between the flat steel plate and the concrete plate, and the flat steel plate, the folded steel plate and the concrete plate are integrated. These synthetic hollow floor structures are described in JP2003-155794A, JP2000-186389A, and the like. In this type of synthetic hollow floor structure, the hollow portion formed between the flat steel plate and the bent steel plate is used as an equipment space for accommodating building equipment piping, electrical / communication wiring, air conditioning ducts and the like.
JP-A-1-203549 JP 2003-155794 A JP 2000-186389 A

  From the viewpoint of improving the productivity and workability of buildings, preserving the surrounding environment of the construction site, or protecting the environment, it has been desired to reduce the amount of concrete placed at the construction site. Under these circumstances, the tendency to actively adopt the PCa construction method that can eliminate much of the concrete placement at the construction site in the construction work is particularly remarkable in recent years. Research and development on the PCa structure and the PCa construction method However, many researchers have implemented this trend. The full precasting of the floor structure greatly contributes to shortening the construction period of the steel structure or RC structure and to the safety of the work, and is also very practical in this respect.

  However, when the hollow floor structure with the combination of the above-mentioned hollow concrete slab, PCa plate and cast-in-place concrete is fully precast, even if the member cross section (concrete cross section) can be reduced as much as possible, the porosity is It can only be designed to about 20-30%. For this reason, a fully precast floor structure still has an excessive weight, so when considering the lifting capacity of the lifting equipment at a general construction site, workability, workability or production efficiency at the construction site is Getting worse.

  On the other hand, according to the above-mentioned synthetic hollow floor structure using bent steel plates, flat steel plates and concrete, the porosity is greatly increased. For example, a lightweight full precast floor structure having a porosity of about 50% is obtained. It can be manufactured.

  However, in the synthetic hollow floor structure having such a configuration, since the mass of the concrete constituting the frame is reduced, it is difficult to expect the heat storage effect of the frame, and the hollow parts are separated from each other via the concrete part. Therefore, the latent heat storage material cannot be arranged as desired.

  Moreover, in the synthetic | combination hollow floor structure of the said structure, in order to ensure the airtightness of an air conditioning duct, it becomes necessary to perform an airtight process to the junction part of steel materials. However, it is extremely difficult to maintain an airtight state for a long period of time with a normal airtight treatment material such as an elastic sealing material.

  The present invention has been made in view of such problems, and its object is to use a hollow portion of a floor structure that is fully precast using a bent steel plate and concrete as an air duct, and to improve efficiency. An object of the present invention is to provide a synthetic hollow floor structure that exhibits a latent heat storage effect and can maintain the airtightness of an air duct over a long period of time.

  Another object of the present invention is to provide a latent heat storage type air conditioning system using such a synthetic hollow floor structure.

In order to achieve the above object, the present invention is composed of upper and lower flanged concrete and a bent plate-shaped bent steel plate disposed between the upper and lower flanged concrete, and the mountain-shaped top of the bent steel plate is formed on the upper flanged concrete. In the synthetic hollow floor structure in which the valley bottom of the bent steel plate is embedded in the lower flange concrete and integrated with the concrete,
A hollow region is defined by the chevron or valley of the bent steel sheet and the flange concrete, and an air duct extending along the chevron or trough is formed by the hollow region.
Provided is a synthetic hollow floor structure in which a latent heat storage material that exchanges heat with air in the air duct is accommodated in the hollow region adjacent to the air duct.

  According to the said structure of this invention, the hollow area | region which comprises an air duct is divided by a bent steel plate and flange concrete. The bent steel plate and the flanged concrete are joined by a mountain-shaped top portion or a valley bottom portion of the bent steel plate embedded in the concrete and have a desired airtightness. Therefore, the air duct does not require a special airtight treatment that is required for a joint portion between steel materials.

  In this invention, the hollow area | region of the bending steel plate adjacent to an air duct is used as a storage container of a latent heat storage material. The latent heat storage material effectively stores a much larger amount of heat in a heat storage material having a small volume and a low mass, compared to sensible heat absorption or sensible heat dissipation of frame heat storage (concrete heat storage). Moreover, since the latent heat storage material exchanges heat with the air in the air duct via the heat transfer partition formed by the bent steel plate (or the bent steel plate and the corrosion resistant coating), the heat conduction path is extremely short and wide. Therefore, since the heat conduction resistance of the heat conduction path is extremely small, an efficient latent heat storage effect can be obtained.

  The present invention also includes a synthetic hollow floor structure having the above-described configuration and an air conditioner connected to the air duct. The conditioned air heated or cooled by the air conditioner is passed through the air duct, and the conditioned air is supplied. An air conditioning system is provided in which latent heat is stored in the latent heat storage material.

  The present invention further includes a synthetic hollow floor structure in which a heat medium pipe is arranged in a hollow region containing a latent heat storage material, an air conditioner connected to the air duct, and a heat source device connected to the heat medium pipe. Then, a heat medium fluid heated or cooled by a heat source device is circulated through the heat medium pipe, and the latent heat storage material is heated or cooled.

  According to the synthetic hollow floor structure of the present invention, the hollow portion of the floor structure that has been fully precast using bent steel plate and concrete is used as an air duct, and an effective latent heat storage effect is exhibited. The airtightness of the duct can be maintained for a long time.

  According to the air conditioning system of the present invention, a latent heat storage type air conditioning system using the floor structure configured as described above is provided.

  In a preferred embodiment of the present invention, a heat medium pipe that circulates a heat medium fluid that can exchange heat with the latent heat storage material is disposed in a hollow region that accommodates the latent heat storage material. Preferably, a material having a higher thermal conductivity than the latent heat storage material, such as metal fibers and carbon fibers, is mixed into the latent heat storage material as a heat transfer accelerator. More preferably, the surface of the bent steel plate constituting the flow path wall of the air duct is covered with a corrosion-resistant coating material. The edge of the covering material extends into the flange concrete and is embedded in the concrete of the flange concrete. As another means, a covering material continuous over the entire circumference of the channel wall of the air duct may be disposed in the air duct.

  Preferably, the opening of the hollow region that can accommodate the latent heat storage material is closed by the lid. The lid defines an accommodation area for the latent heat storage material. Preferably, an opening that can be closed for introducing the latent heat storage material into the hollow region is provided in the lid.

  The floor structure preferably includes an opening communicating with the indoor space, the indoor air conditioner, the indoor plenum chamber, or another system air duct. The air conditioning system of the present invention including the heat medium pipe of the floor structure further includes a heat source device connected to the heat medium pipe. The heat medium fluid heated or cooled by the heat source device circulates through the heat medium pipe and heats or cools the latent heat storage material.

  According to a preferred embodiment of the present invention, a floor structure manufactured in a factory or the like has a hollow region that can be filled with a latent heat storage material, and an occluding opening for introducing the latent heat storage material into the hollow region. A part. Since the latent heat storage material undergoes a phase change at the atmospheric temperature, the floor structure is transported to a construction site or the like without being filled with the latent heat storage material. The floor structure transported to a construction site or the like is opened at the opening, and the liquid latent heat storage material is introduced into the hollow region through the opening.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1A is a partial cross-sectional view showing a configuration of a synthetic hollow floor structure according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along a line I-I in FIG. is there. FIG. 1C is a partial perspective view of a synthetic hollow floor structure, and FIGS. 1D, 1E, and 1F are partial enlarged cross-sectional views of the synthetic hollow floor structure.

  The synthetic hollow floor structure 1 is composed of upper and lower flange concretes 2 and 3 and a bent steel plate 4 arranged between the flange concretes 2 and 3. The bent steel plate 4 is made of a hot dip galvanized steel plate having a predetermined plate thickness (for example, a thickness of about 1 mm) bent into a folded plate shape. On the upper surface and the lower surface of the bent steel plate 4, chevron portions and trough portions are alternately arranged. The main reinforcing bar 5 and the reinforcing bar 6 are arranged in a grid pattern on the flange concrete 2, and the main reinforcing bar 7 and the distributing bar 8 are arranged on the flange concrete 3 in a grid pattern. The thicknesses h1 and h2 of the flange concretes 2 and 3 are set to about 50 to 70 mm. Grooves having a V-shaped cross section and an inverted V-shaped cross section extending in the main bar direction are alternately formed in the direction of the distribution bar. A mold-substitute hollow material 9 made of a resin foam such as polystyrene foam is filled in the V-shaped groove (V-shaped hollow region). The bottom opening of the inverted V-shaped groove is closed by flange concrete 3.

  As shown in FIG. 1 (A) to FIG. 1 (C), a large number of hollow regions having a triangular cross section are arranged in parallel between the upper and lower flange concretes 2 and 3 by inverted V-shaped grooves. The inverted V-shaped hollow region at a predetermined position is used as the air conditioning air supply duct 11, and the other hollow region functions as a hollow portion (gap portion) 12 for reducing the weight of the floor structure 1.

  The floor structure 1 having a structure in which the flange concrete 2, 3 and the bent steel plate 4 are integrated has a porosity of about 50%. The floor structure 1 has a thickness H of about 250 to 300 mm, but the weight of the floor structure 1 is considerably reduced when compared with a normal concrete floor slab having an equivalent thickness, The structure 1 exhibits a relatively high strength and yield strength with respect to the load. For this reason, the floor structure 1 can be preferably used for a long-span full precast flooring method.

  An opening 15 of the air conditioning and air supply duct 11 is formed in the lower flange concrete 3. The opening 15 includes a through hole having a circular or rectangular cross section that penetrates the lower flange concrete 3 in the vertical direction. The air conditioning air supply duct 11 is connected to an air conditioner (not shown) arranged in an air conditioning machine room or the like, and constitutes an air conditioning air supply system duct that conveys conditioned air. Air-conditioned air whose temperature and humidity are adjusted is supplied to the air-conditioning duct 11. The conditioned air is ventilated into the conditioned air supply duct 11 as indicated by an arrow A in FIGS. 1 (B), 1 (C) and 1 (F).

  The distribution bars 6 and 8 of the upper and lower flange concretes 2 and 3 are formed on the mountain top 41 and the valley bottom 42 of the bent steel plate 4 as shown in FIGS. 1 (D) to 1 (F) as weld fixing portions 6a and 8a. Spot welded. In the vicinity of the weld fixing portions 6a, 8a, etc., rust, metal corrosion, etc. are likely to occur. For this reason, if moisture such as condensed water is generated in the air-conditioning air supply duct 11 due to condensation of air-conditioned air, etc. There is a concern that rusting or metal corrosion may occur in the vicinity of the fixing portions 6a and 8a.

  In order to prevent rusting or metal corrosion of the bent steel plate 4, a corrosion-resistant coating material 50 is attached to the bent steel plate 4 and the surface of the bent steel plate 4 facing the air conditioning air supply duct 11 is covered. As shown in FIG. 1 (E), the corrosion-resistant covering material 50 completely covers the surface of the bent steel plate 4 in the air-conditioning air supply duct 11, and the lower end (edge) 50a of the corrosion-resistant covering material 50 is a lower flange. As a result, the floor structure 1 is formed with a sealed space that extends into the concrete 3 and is surrounded by the corrosion-resistant covering material 50 and the upper surface of the lower flange concrete 3. Since the bent steel plate 4 is completely shielded from moisture generated in the air-conditioning air supply duct 11 by the corrosion-resistant coating material 50, rusting or metal corrosion of the bent steel plate 4 due to condensation in the duct can be reliably prevented. .

  As the corrosion-resistant coating material 50, a metal thin plate or a metal molded product such as a hot-dip galvanized steel plate and a stainless steel plate having desired corrosion resistance can be preferably used. A synthetic resin, rubber or elastomer film material, thin plate material or molding material having desired thermal conductivity, corrosion resistance material and durability may be used as the corrosion resistance coating material 50. By attaching the corrosion-resistant covering material 50 to a predetermined position of the bent steel plate 4 in advance and lowering the bent steel plate 4 onto the uncured lower flange concrete 3, the air-conditioning air supply duct 11 can be installed. As a modification, a synthetic resin paint having a desired corrosion resistance and durability may be applied to the bent steel plate 4 to form a corrosion-resistant coating film or film on the inner wall surface (flow channel wall) of the air-conditioning air supply duct 11. .

  As shown in FIGS. 1 (A) and 1 (E), a latent heat storage material 10 is filled in a V-shaped groove (V-shaped hollow region) at a predetermined position related to the air-conditioning air supply duct 11. In this embodiment, the latent heat storage material 10 is filled in two V-shaped grooves arranged between the three air-conditioning air supply ducts 11 arranged in parallel. The web portion of the bent steel plate 4 and the corrosion-resistant covering material 50 form a heat transfer partition between the air-conditioning air supply duct 11 and the latent heat storage material 10 so as to separate the air-conditioning air supply duct 11 and the latent heat storage material 10 so as to allow heat exchange. .

  Suitable as the latent heat storage material 10 is an organic heat storage material having a melting / solidification temperature of about 10 to 20 ° C., a thermal conductivity of 0.2 to 0.5 w / mk (at 30 ° C. liquid), and a latent heat of about 100 to 200 kJ / kg. Can be used for Examples of this type of heat storage material include heat storage materials mainly composed of paraffin, polyethylene glycol, trimethylolethane, or the like. Preferably, a heat storage material mainly composed of trimethylolethane hydrate and urea having relatively low corrosiveness to metals is used as the latent heat storage material 10. If desired, a corrosion-resistant coating is applied to the surface of the bent steel plate 4 in contact with the latent heat storage material 10.

  The latent heat storage material 10 stores cold or warm heat during low-load air conditioning operation or late-night power operation, and absorbs or dissipates heat during high-load operation or peak loads, or when the running cost is likely to increase the air conditioning load. Functions to level. According to the latent heat storage type heat storage device that uses the solidification heat or melting heat of the heat storage material at the time of phase change, a much larger amount of heat is reduced compared to sensible heat absorption or sensible heat dissipation such as housing heat storage (concrete heat storage). Heat can be efficiently stored in a heat storage material having a large volume and a low mass. Accordingly, the floor structure 1 that is merely provided with the thin flange concrete 2 and 3 is less likely to exhibit the frame heat storage effect (sensible heat storage effect), but by the latent heat storage effect of the latent heat storage material 10 filled in the hollow region, Demonstrate sufficient load fluctuation leveling.

  As shown in FIG. 1E, the heat medium pipe 60 is embedded in the center of the latent heat storage material 10. The heat medium pipe 60 is connected to a heat source device (not shown) that cools or heats the heat medium fluid (such as cold / hot water) using midnight power, surplus heat during low-load air conditioning operation, or the like. The heat of the heat medium fluid circulating through the heat medium pipe 60 is transferred to the latent heat storage material 10 and stored in the latent heat storage material 10. The heat medium pipe 60 is made of a metal pipe such as a steel pipe or a copper pipe, and has a diameter of about 40 to 80 mm. If desired, a heat transfer fin or the like may be formed on the metal tube.

  The V-shaped groove containing the latent heat storage material 10 is closed by the lid body 70. The lid 70 is made of a thin metal plate or a metal molded product such as a hot-dip galvanized steel plate or a stainless steel plate, and has both edge portions 71 bent downward. A proximity portion or a contact portion between the bent steel plate 4 and the edge portion 71 is hermetically sealed by an elastic sealing material 72. A small gap 73 is formed between the upper surface of the latent heat storage material 10 and the lower surface of the lid 70.

  Preferably, metal fibers (not shown) such as copper or aluminum alloy having high thermal conductivity are mixed in the latent heat storage material 10 as a heat transfer accelerator, and the metal fibers are dispersed in the latent heat storage material 10. According to experiments by the present inventors regarding the thermal diffusivity of the latent heat storage material 10 that does not mix metal fibers and the thermal diffusivity of the latent heat storage material 10 mixed with a small amount (about 3%) of metal fibers, In the mixed latent heat storage material 10, it takes a relatively long time for the solidified layer to grow over the entire area of the latent heat storage material 10 after the solidified layer of the latent heat storage material 10 is generated in the region near the cooling surface. In the latent heat storage material 10 mixed with a small amount of metal fiber, the solidified layer grows over the entire area of the latent heat storage material 10 in a relatively short time. That is, by mixing the metal fiber into the latent heat storage material 10, the thermal diffusibility of the latent heat storage material 10 can be greatly improved.

  As a heat transfer accelerator that replaces metal fibers, carbon fibers may be mixed into the latent heat storage material 10 and the carbon fibers may be dispersed in the latent heat storage material 10. The carbon fibers are mixed in the latent heat storage material 10 in a form in which the fibers are gathered in a mesh shape or a brush shape, for example. The metal fiber or carbon fiber generally has a thermal conductivity higher than the thermal conductivity of the latent heat storage material 10 and effectively acts as a heat transfer promoting means for improving the thermal diffusibility of the latent heat storage material 10 as described above. Preferably, metal fibers or carbon fibers having a thermal conductivity of 30 W / m · K or more, more preferably 100 W / m · K or more, are added to the latent heat storage material 10. As a modification, a heat transfer accelerator made of a metal, carbon, or resin material that has been processed and prepared or molded so as to function as a heat transfer promoting means equivalent to that of metal fiber or carbon fiber is mixed in the latent heat storage material 10, and latent heat is obtained. It is also possible to disperse in the heat storage material 10.

  FIGS. 2A and 2B are cross-sectional views illustrating usage patterns of the air-conditioning / air supply duct 11. FIG. 2 (A) shows a usage pattern in which conditioned air is blown directly from the opening 15 to the indoor space R on the lower floor, and FIG. 2 (B) shows the conditioned air supply duct 11 on the secondary side ( The use form connected to the indoor side) air conditioner 24 is shown.

  In the usage pattern shown in FIG. 2A, the lower surface of the floor structure 1 forms the interior base surface of the interior space R of the lower floor, and the ceiling interior finishing material 21 is applied to the lower surface of the floor structure 1. . An air-conditioning air blowing device 22 is attached to the lower end portion of the opening 15, and the air-conditioned air in the air-conditioning air supply duct 11 flows out from the blowing device 22 into the indoor space R.

  In the usage pattern shown in FIG. 2 (B), the ceiling structure 23 is constructed on the lower side of the floor structure 1, and the secondary side air conditioner 24 is disposed in the ceiling back area B. The opening 15 of the air conditioning supply duct 11 shown in the center is connected to the air conditioning equipment 24 by a relay duct 25. Air-conditioned air in the air-conditioning / air supply duct 11 is supplied to the intake portion of the air-conditioning equipment 24 via the relay duct 25.

  The air conditioner 24 is connected to the indoor air inlet 26 via the indoor air circulation duct 27 and forcibly circulates the indoor air. The air conditioner 24 blows out air whose temperature and humidity are adjusted from the blow-out opening 29 to the indoor space R. If desired, a control valve 28 such as a switching control valve is disposed in the relay duct 25. Note that the other two air conditioning supply ducts 11 shown in FIG. 2B are connected to other air conditioning equipment (not shown) via other openings 15 and relay ducts 25 (shown by broken lines). The

  FIG. 2C schematically shows the configuration of the air conditioning system including the air conditioning air supply duct 11, the latent heat storage material 10, and the heat medium pipe 60.

  In the heat storage operation of the air conditioning system in the heating period, conditioned air A (warm air) having a relatively high temperature is blown into the air conditioning air supply duct 11 from the air conditioner, or high-temperature heat medium fluid (warm water) is electrically heated. It is forcibly circulated through the heat medium pipe 60 by a heat source device such as a water heater. The heat of the conditioned air A is transferred to the latent heat storage material 10 through the heat transfer partition formed by the web portion of the bent steel plate 4 and the corrosion-resistant coating material 50, and is stored in the latent heat storage material 10. The heat held by the heat medium fluid flowing through the heat medium pipe 60 is transferred to the latent heat storage material 10 via the tube wall of the heat medium pipe 60 and stored in the latent heat storage material 10. That is, the latent heat storage material 10 changes from a solid phase to a liquid phase, and stores heat received from the conditioned air A (warm air) or the heat medium fluid as latent heat of fusion.

  In the air-conditioning operation (heating operation) of the air-conditioning system in the heating period, the conditioned air A blown from the air-conditioner to the air-conditioning air supply duct 11 is stored as latent heat through the heat transfer partition (the bent steel plate 4 and the corrosion-resistant coating material 50). After exchanging heat with the material 10 and receiving the heat held by the latent heat storage material 10, the heat is supplied to the indoor space R or the air conditioner 24. That is, the latent heat storage material 10 changes phase from a liquid phase to a solid phase and heats the conditioned air A by latent heat radiation during solidification.

  On the other hand, in the heat storage operation of the latent heat storage material 10 of the air conditioning system in the cooling period, conditioned air A (cold air) having a relatively low temperature is blown from the air conditioner into the air conditioning supply duct 11 or a low temperature heat medium. The fluid (cold water) is forcibly circulated through the heat medium pipe 60 by the heat source device. The heat possessed by the latent heat storage material 10 is transferred to the conditioned air A via the heat transfer partition (the bent steel plate 4 and the corrosion resistant coating material 50), or transferred to the heat medium fluid via the tube wall of the heat medium pipe 60. heat. That is, the latent heat storage material 10 that has been deprived of heat by the conditioned air A or cold water undergoes a phase change from the liquid phase to the solid phase, and stores solidification latent heat as cold heat.

  In the air conditioning operation (cooling operation) of the air conditioning system in the cooling period, the conditioned air A blown from the air conditioner to the air conditioning air supply duct 11 is stored as latent heat through the heat transfer partition (the bent steel plate 4 and the corrosion resistant coating material 50). Heat is exchanged with the material 10, and the latent heat storage material 10 takes away the heat held by the conditioned air A. The latent heat storage material 10 receives heat from the conditioned air A and melts, and changes from a solid phase to a liquid phase. The conditioned air A is cooled by the heat absorption action of the latent heat storage material 10 that absorbs the heat of the conditioned air A as the latent heat of fusion at the time of phase change, and the cooled conditioned air A is fed to the indoor space R or the air conditioning equipment 24. .

  Reduce the air conditioning operation load during daytime operation or peak load by using the above-mentioned heat storage operation using late-night power or surplus heat when the air conditioning load is reduced, or the time of the air conditioning load Variations can be leveled. This is extremely advantageous in reducing the air conditioning running cost or in reducing the capacity of the heat source equipment constituting the air conditioning equipment.

  If desired, during the heat storage operation using the conditioned air A as a heat source, the conditioned air A of the conditioned air supply duct 11 is not circulated to the indoor space R or the indoor air conditioner 24, and the conditioned air A is bypassed (not shown). Alternatively, the air-conditioning return air duct 13 (FIG. 3) or the like may be directly refluxed to the air-conditioning machine.

  5-10 is a perspective view which shows the manufacturing method of the floor structure 1 shown in FIG. FIG. 11 is a partial cross-sectional view showing the process of introducing the latent heat storage material 10.

  As shown in FIG. 5, a corrosion-resistant covering material 50 is attached to a portion of the inverted V-shaped groove constituting the air conditioning air supply duct 11 so as to cover the bent steel plate 4. The main bars 5 and 7 and the power distribution bars 6 and 8 are arranged in a lattice pattern on the upper side surface and the lower side surface of the bent steel plate 4. The distribution bars 6 and 8 are spot-welded to the mountain-shaped top part 41 and the valley bottom part 42 as shown as weld fixing parts 6a and 8a in FIGS. 1 (D) to 1 (F). The V-shaped groove at a predetermined position is filled with a heat medium pipe 60 and a fiber 80 such as a metal fiber having high thermal conductivity. The other V-shaped groove is filled with a hollow material 9.

  As shown in FIG. 6, a lid 70 is inserted into the V-shaped groove that accommodates the heat medium pipe 60 and the fiber 80. The lid 70 closes the upper part of the V-shaped groove. As shown in FIG. 1 (E), the edge portion 71 of the lid body 70 and the proximity portion or contact portion between the bent steel plate 4 and the mountain-shaped top portion are hermetically sealed by an elastic sealing material 72.

  As shown in FIG. 6, a heat storage material introduction hole 91 is formed at a predetermined position of the lid body 7. The heat storage material charging tube 90 is attached to the heat storage material introduction hole 91 as shown in FIG. The tube 90 and the introduction hole 91 have the same cross section (circular cross section in this example). FIG. 7 shows a state immediately after the concrete of the lower flange concrete 3 is placed. The opening 15 of the lower flange concrete 3 is formed by previously arranging a through hole construction sleeve or the like on a concrete casting form (not shown). The bent steel plate 4 is lowered onto the lower flange concrete 3 vertically before the lower flange concrete 3 is hardened.

  As shown in FIG. 8, the valley bottom 42 of the bent steel plate 4 is embedded in the lower flange concrete 3. The main reinforcing bars 7 and the reinforcing bars 8 arranged on the lower surface of the bent steel plate 4 are embedded in the lower flange concrete 3. The embedding dimension h3 of the valley bottom 42 is set to about 5 to 10 mm, for example.

  As shown in FIG. 9, following the placement of the lower flange concrete 3, the concrete of the upper flange concrete 2 is placed on the bent steel plate 4. The mountain top 41 is embedded in the upper flange concrete 2, and the main reinforcement 5 and the distribution bar 6 are embedded in the upper flange concrete 2. The concrete of the upper flange concrete 2 is cured through a predetermined curing process and integrated with the bent steel plate 4.

  As shown in FIG. 10, the floor structure 1 in which the bent steel plate 4 and the flange concrete 2, 3 are integrated is an air-conditioning air supply duct 11 having an inverted V-shaped hollow area defined by the bent steel plate 4 and the lower flange concrete 3. And a hollow portion 12. The floor structure 1 also has a V-shaped region defined by the bent steel plate 4 and the upper flange concrete 2 and containing the hollow material 9 and the fibers 80. On the upper surface of the floor structure 1, the opening top of the tube body 90 is disposed.

  Since the latent heat storage material 10 undergoes a phase change at the atmospheric temperature, in this embodiment, the floor structure 1 is transported to a construction site or the like in a state before being filled with the latent heat storage material 10. The latent heat storage material 10 is introduced into the V-shaped hollow region of the floor structure 1 carried into a construction site or the like.

  FIG. 11 shows a process of introducing the latent heat storage material 10 at the construction site. As shown in FIG. 11 (A), a plurality of tubular bodies 90 are disposed in the V-shaped hollow region in which the fibers 80 are accommodated. Both ends of the V-shaped hollow region are closed by a closing means (not shown), and the tube 90 is disposed in the vicinity of both ends of the V-shaped hollow region. The liquid latent heat storage material 10 is introduced into the tube 90 and filled in the hollow region. As shown in FIG. 11 (B), only a small-sized gap 73 that allows volume expansion of the latent heat storage material 10 is left between the lid body 70 in the hollow region.

  The top of the opening of the tube body 90 is airtightly and liquid-tightly closed by a lid member 92 as shown in FIG. As the air-tight / liquid-tight means, a mechanical sealing means such as a screw, a fitting mechanism, or welding can be used, or a chemical joining means such as a sealing material or an adhesive can be used. As the pipe body 90, a pipe body made of a material having a relatively low thermal conductivity, for example, a resin pipe such as a vinyl chloride pipe can be suitably used. Preferably, screw threads and screw grooves, mutual fitting means, and the like are formed on the lid member 92 and the tube body 90, and the lid member 92 is releasably screwed or fitted to the tube body 90. According to such a configuration, the lid member 92 and the tubular body 90 can be used as means for replacing the aged latent heat storage material 10 with a new latent heat storage material.

  FIG. 3 is a cross-sectional view showing a modification of the floor structure 1 shown in FIGS. 1 and 2.

  In the floor structure 1 shown in FIGS. 3A and 3B, a part of the hollow region is used as the air-conditioning return air duct 13. The other hollow regions other than the hollow regions of the ducts 11 and 13 function as the hollow portion 12 for reducing the weight of the floor structure 1 and the like.

  The air-conditioning return air duct 13 is connected to an air conditioner (not shown) such as an air conditioner room and recirculates indoor air to the air conditioner. An opening 16 for return air is formed in the lower flange concrete 3. The opening 16 includes a through hole having a circular or rectangular cross section that vertically penetrates the lower flange concrete 3.

  In the usage pattern shown in FIG. 3A, the indoor air suction device 31 is attached to the lower end of the opening 16. The indoor air in the indoor space R flows from the suction device 31 into the air conditioning return air duct 13 and returns to the air conditioner. In the usage pattern shown in FIG. 3B, the opening 16 is connected to the return air part of the air conditioner 24 by the relay duct 32. The return air from the air conditioner 24 returns to an air conditioner such as an air conditioning machine room via the relay duct 32 and the air conditioner return air duct 13. If desired, a control valve 33 such as a switching control valve is provided in the relay duct 32.

  In addition, in the floor structure 1 of FIG. 3 (A) and FIG. 3 (B), the corrosion-resistant coating | covering material 50 is arrange | positioned in both the air-conditioning air supply duct 17 and the air-conditioning return air duct 13, respectively.

  FIG. 4 is a cross-sectional view showing a further modification of the floor structure 1 shown in FIGS. 1 and 2.

  In the floor structure 1 shown in FIGS. 4 (A) and 4 (B), the air-conditioning / air supply duct 17 is formed by a V-shaped groove from which the hollow material 9 is removed or unfilled. An opening 18 of the air conditioning and air supply duct 17 is formed in the upper flange concrete 2. The opening 18 includes a through hole having a circular or rectangular cross section that vertically penetrates the upper flange concrete 2. Inverted V-shaped grooves located on both sides of the air conditioning duct 17 are filled with the latent heat storage material 10, and a heat medium pipe 60 is embedded in the center of the latent heat storage material 10.

  In the floor structure 1 shown in FIG. 4A, the floor finishing material 35 is applied to the upper surface of the floor structure 1, and the floor blowing device 36 is attached to the upper end portion of the opening 18. The conditioned air in the air-conditioning / air supply duct 17 is blown upward from the floor blowing device 36 in the opening 18 into the indoor space R.

  In the floor structure 1 shown in FIG. 4B, the floor finishing material 37 is supported at a predetermined level by a double floor structure (not shown), and the underfloor plenum chamber 38 includes the floor structure 1 and the floor finishing material 37. Formed between. The conditioned air in the conditioned air supply duct 17 is blown out from the floor blowing device 39 to the indoor space R through the opening 18 and the underfloor plenum chamber 38.

  In the manufacture of the floor structure 1 in FIGS. 4A and 4B, the latent heat storage material 10 and the heat medium pipe 60 are filled or piped into the inverted V-shaped groove of the bent steel plate 4. If desired, the latent heat storage material 10 is held in the inverted V-shaped groove by a lid 75 (shown in broken lines). A concrete casting form 55 for the upper flange concrete 2 is disposed in the V-shaped groove constituting the air conditioning and air supply duct 17. The formwork 55 is buried in the floor structure 1 after the concrete casting of the upper flange concrete 2. An opening 56 that matches the opening 18 is formed in the mold 55 in advance. Similar to the floor structure shown in FIGS. 1 to 3, a corrosion-resistant covering material 50 is disposed in the air-conditioning air supply duct 17. The corrosion-resistant covering material 50 is attached in advance to a predetermined position of the bent steel plate 4, for example, and the upper edge portion of the corrosion-resistant covering material 50 is embedded in the concrete of the upper flange concrete 2. The mold 55 and the corrosion-resistant coating material 50 may be integrated, or the mold 55 may be formed by the corrosion-resistant coating material 50 itself.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Needless to say, such variations and modifications are also included in the scope of the present invention.

  For example, a plurality of air conditioning ducts that supply conditioned air to the lower floor and the upper floor may be formed in the floor structure.

  Moreover, you may comprise a heat carrier piping as a heat pipe, or you may comprise as a heat carrier circulation piping of a heat pump type heat source apparatus.

  Furthermore, a heat transfer rib or the like for improving heat transfer efficiency may be formed on the corrosion-resistant coating material or the bent steel plate.

  Moreover, you may use the hollow area | region of the floor structure which is not used as an air-conditioning or ventilation duct as a wiring space for electrical / communication equipment, or as a piping space of a water supply / drainage sanitary equipment.

  The synthetic hollow floor structure of the present invention is applied to a building or the like as a light weight full precast floor structure. The air duct of the floor structure is connected to an air conditioner such as an air conditioning machine room or a ventilation fan, and constitutes an air supply system, a return air system, or an exhaust system of an air conditioning ventilation facility that conveys air conditioned air or the like. Since the air duct of the air conditioning ventilation equipment is built into the floor structure, the need to secure the air duct installation space behind the ceiling is eliminated or reduced, increasing the ceiling height of the indoor space or building The floor height can be lowered. In addition, the on-site construction of the air duct becomes unnecessary, or the number of duct members or duct parts to be constructed on the site is reduced, so that the construction of the building equipment can be rationalized or labor-saving.

It is the fragmentary sectional view which shows the Example of the synthetic | combination hollow floor structure of this invention, II sectional view, a partial perspective view, and a partial expanded sectional view. It is sectional drawing which shows the usage example of the floor structure shown in FIG. It is sectional drawing which shows the modification of the floor structure shown in FIG.1 and FIG.2. It is sectional drawing which shows the further modification of the floor structure shown to FIG.1 and FIG.2. It is a perspective view which shows the manufacturing method of the floor structure shown in FIG. 1, and the process of arrange | positioning or attaching a heat-medium piping, a fiber, a hollow material, a corrosion-resistant coating material, and a reinforcing bar to a bending steel plate is shown. It is a perspective view which shows the manufacturing method of a floor structure, and the process of attaching a cover body to a bending steel plate is shown. It is a perspective view which shows the manufacturing method of a floor structure, and the process of dropping a bent steel plate on uncured lower flange concrete is shown. It is a perspective view which shows the manufacturing method of a floor structure, and the state which integrated the bent steel plate with the lower flange concrete is shown. It is a perspective view which shows the manufacturing method of a floor structure, and the state which laid the upper flange concrete is shown. It is a perspective view which shows the manufacturing method of a floor structure, and the state after hardening and curing of upper flange concrete is shown. It is a fragmentary sectional view which shows the manufacturing method of a floor structure, and the introduction process of a latent heat storage material is shown.

Explanation of symbols

1: Synthetic hollow floor structure 2: Upper flange concrete 3: Lower flange concrete 4: Bent steel plate 5, 7: Main reinforcement 6, 8: Distribution reinforcement 9: Hollow material for formwork substitution 10: Latent heat storage material 11, 17: Air conditioning Air supply duct 13: Air-conditioning return air duct 15, 16, 18: Opening 41: Top of mountain shape 42: Bottom of valley 50: Corrosion-resistant coating material 60: Heat medium piping 70: Lid

Claims (8)

It is composed of upper and lower flanged concrete and a bent plate-shaped bent steel plate disposed between the upper and lower flanged concrete, and the mountain-shaped top of the bent steel plate is embedded in the upper flanged concrete and integrated with the concrete, In the synthetic hollow floor structure in which the valley bottom of the bent steel plate is embedded in the lower flange concrete and integrated with the concrete,
A hollow region is defined by the chevron or valley of the bent steel sheet and the flange concrete, and an air duct extending along the chevron or trough is formed by the hollow region.
A synthetic hollow floor structure in which a latent heat storage material that exchanges heat with air in the air duct is accommodated in the hollow region adjacent to the air duct.   The synthetic hollow floor structure according to claim 1, wherein a heat medium pipe that circulates a heat medium fluid that exchanges heat with the latent heat storage material is disposed in the hollow region in which the latent heat storage material is accommodated.   The synthetic hollow floor structure according to claim 1 or 2, wherein a material having a higher thermal conductivity than the latent heat storage material is mixed in the latent heat storage material as a heat transfer accelerator.   The synthetic hollow floor structure according to any one of claims 1 to 3, wherein an opening of the hollow region capable of accommodating the latent heat storage material is closed by a lid. The synthetic hollow floor structure according to claim 4, wherein an opening that can be closed for introducing the latent heat storage material into the hollow region is provided in the lid .   The synthetic hollow floor structure according to claim 1 and an air conditioner connected to the air duct, wherein conditioned air heated or cooled by the air conditioner is passed through the air duct, and the heat of the conditioned air An air conditioning system in which latent heat is stored in the latent heat storage material.   A heat medium having the synthetic hollow floor structure according to claim 2, an air conditioner connected to the air duct, and a heat source device connected to the heat medium pipe, and being heated or cooled by the heat source device. An air conditioning system characterized in that a fluid is circulated through the heat medium pipe to heat or cool the latent heat storage material.   8. The air conditioning system according to claim 7, wherein the conditioned air heated or cooled by the air conditioner is passed through the air duct, and the heat of the conditioned air is further stored in the latent heat storage material.

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