Floor radiant convection heating and cooling system and method for constructing a floor radiant convection heating and cooling system

Abstract

The objective is to provide a floor radiant convection heating and cooling system and a method for installing a floor radiant convection heating and cooling system that can be easily installed during renovations. [Solution] The floor structure is provided with a chamber section that is positioned on the underside of one side in the longitudinal direction of the main beam and perpendicular to the main beam, forming a flow path for hot and cold air from an air conditioner installed in the room, and a heat insulating / insulating section made of a flexible material that is positioned to close the gaps between the main beams at approximately the same height as the underside of the main beams in a plan view, with its lower end in contact with the floor slab and its upper end at approximately the same height as the underside of the main beams. Openings are provided in the upper wall of the chamber section at each of the main beams to allow the hot and cold air flowing inside the chamber section to flow out, and the problem was solved by a floor radiant convection heating and cooling system that allows hot and cold air from the air conditioner to flow into the gaps between the main beams through the openings.

Description

Technical Field

[0001] The present invention relates to a floor radiant convection cooling and heating system and a construction method for a floor radiant convection cooling and heating system, which can easily facilitate, by means of renovation, the construction of converting an indoor floor structure of an existing building such as an evacuation shelter, a gymnasium, a public hall, a single-family house, an apartment or an office building into a floor structure capable of changing the indoor air temperature by radiant convection through flowing hot and cold air in an underfloor space.

Background Art

[0002] Patent Document 1 discloses a cooling and heating system that performs cooling or heating for a cooling and heating target room in which an underfloor space is formed on the back side of a floor material, comprising: a partitioning member that partitions the underfloor space to form an upper space in contact with the floor material; an underfloor duct that supplies air having a lower temperature than outside air to the upper space when cooling the cooling and heating target room, and supplies air having a higher temperature than outside air to the upper space when heating the cooling and heating target room; and a blower that supplies the air having a temperature different from the outside air temperature to the underfloor duct.

[0003] Patent Document 2 discloses a construction method for a floor cooling and heating structure, comprising: fixing a pair of bar-shaped members opposite to each other on a floor substrate; forming a groove having a width substantially equal to the diameter of a pipe for circulating a floor cooling and heating medium between the pair of bar-shaped members; then fitting and setting the pipe into the groove via a heat expansion plate; and then laying a floor finishing material on the surface to construct the floor cooling and heating floor structure.

[0004] Patent Document 3 describes a first rectangular steel pipe that is positioned in contact with or in close proximity to a partition member forming the outline of a space to be heated or cooled, from the back side of the space to be heated or cooled, and having an opposing surface which is the side on which the partition member will be located, a pair of adjacent surfaces adjacent to the opposing surface, and an opposing surface which is the surface opposite to the opposing surface, and a second rectangular steel pipe that is in contact with the opposing surface and is positioned intersecting with the first rectangular steel pipe, wherein the first rectangular steel pipe and the second rectangular steel pipe are in contact at the position where they intersect, A base member set is disclosed, wherein a connecting hole is formed in each of the first and second rectangular steel pipes, connecting the interior of the first rectangular steel pipe and the interior of the second rectangular steel pipe, an inlet for a gaseous heat transfer medium is formed in at least one of the first and second rectangular steel pipes, and the first rectangular steel pipe has a plurality of outlets for the gaseous heat transfer medium formed on the opposing surface at predetermined intervals in the direction in which the first rectangular steel pipe extends, extending in a direction intersecting the direction in which the first rectangular steel pipe extends, and the outlets extend to the adjacent surface. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2009-115355 [Patent Document 2] Japanese Patent Application Publication No. 9-222236 [Patent Document 3] Japanese Patent Publication No. 2023-77655 [Overview of the project] [Problems that the invention aims to solve]

[0006] The invention described in Patent Document 1 involves installing an insulating member, which is a partitioning material between an upper and lower space, by attaching a plate hanger to the main beam, fitting the projection at the lower end of the plate hanger into a hole in the insulating member receiving plate, and bending the projection outward to place the insulating member on the insulating member receiving plate. Therefore, in order to install the heating and cooling system described in Patent Document 1 as an additional construction project during renovation of an existing detached house, an existing apartment building, or an existing office building, it would require extensive work such as removing all the flooring, resulting in high construction costs.

[0007] The invention described in Patent Document 2 involves attaching a floor base to the top surface of a joist and then installing a series of pipes on top of it for circulating a heating and cooling medium. However, when attempting to implement additional work using the floor heating and cooling structure construction method described in Patent Document 2 during renovations of existing detached houses, apartments, or office buildings, it would require extensive work such as removing all the flooring, resulting in high construction costs. Furthermore, it would raise the height of the existing flooring, necessitating a reduction in the overall height of the interior space.

[0008] The invention described in Patent Document 3 involves providing holes in the joists and beams to allow hot and cold air to pass through. However, when performing additional work using the base material set described in Patent Document 3 during renovations of existing detached houses, existing condominiums, or existing office buildings, it would require extensive work such as removing all the flooring, joists, and beams and replacing them with beams and joists that have been perforated, resulting in a longer construction period and higher construction costs.

[0009] This invention was conceived in view of these problems, and aims to provide a floor radiant convection heating and cooling system and a method for installing a floor radiant convection heating and cooling system that can be easily and inexpensively installed during renovations in existing buildings, such as existing evacuation shelters, existing gymnasiums, existing community centers, existing detached houses, existing condominiums, or existing office buildings. [Means for solving the problem]

[0010] The floor radiant convection heating and cooling system according to claim 1 comprises a floor structure comprising: a plurality of supports vertically installed on a floor slab; a plurality of elongated metal joists supported by the supports and arranged in parallel rows; and a plurality of elongated metal joists that abut against the upper surface of the joists and are arranged in parallel rows perpendicular to the joists, and abut against the lower surface of the flooring material constituting the room and support the flooring material; a chamber portion disposed on the lower side of one of the joists in the longitudinal direction and in a direction perpendicular to the longitudinal direction of the joists, with its upper surface in contact with the lower surface of the joists, and having at least an upper wall portion and side wall portions made of plate-shaped insulating material, which serves as a passage for hot and cold air from an air conditioner installed in the room; and a wide area that covers at least the area from the gap between the joists to the chamber portion in a plan view. The air conditioner comprises a space formed by the height between the upper surface of the floor slab and the lower surface of the main beam, and an insulating / blocking section made of an insulating material, which is provided to block the inflow of the hot or cold air flowing upward from the main beam, with its lower end in contact with the floor slab and its upper end at approximately the same height as the lower surface of the main beam. In a plan view, all gaps between the main beams are closed by the insulating / blocking section and the chamber section, which are in contact with the lower surface of the main beams. An opening is provided in the upper wall of the chamber section for each of the main beams, and the hot or cold air that flows into the chamber section from the air conditioner is allowed to flow out from the opening between the main beams, and after flowing between the floor material, the main beams and the insulating / blocking section, it is allowed to flow back into the room from a recirculation port provided in the floor material.

[0011] The floor radiant convection heating and cooling system according to claim 2 is characterized in that, according to claim 1, the heat insulation / blocking section is a rectangular parallelepiped formed from a material having heat insulation and flexibility that is a heat insulation / blocking component, a substantially U-shaped form obtained by folding a plastic corrugated cardboard having heat insulation properties into a substantially U-shape in a longitudinal cross-section, or a laminated form obtained by spraying and laminating a foamed material having heat insulation properties that is a heat insulation / blocking component.

[0012] The floor radiant convection heating and cooling system construction method according to claim 3 comprises a floor structure comprising: a plurality of support structures suspended on a floor slab; a plurality of elongated metal joists supported by the support structures and arranged in parallel rows; and a plurality of elongated metal joists that abut against the upper surface of the joists and are arranged in parallel and perpendicular directions to the joists, abutting against the lower surface of the floor material constituting the room and supporting the floor material; a construction opening construction step comprising: providing a construction opening in the floor material corresponding to substantially above substantially the entire range of the gap between two predetermined adjacent joists in a plan view, and creating a plurality of loading openings enclosed by the joists and joists inside the construction opening; and providing the loading opening in a space comprising an area that covers at least the area excluding the chamber section arranged in a direction substantially perpendicular to the longitudinal direction of the joists, which forms a flow path for hot and cold air from an air conditioner installed in the room, from the gap between the joists in a plan view, and the height between the upper surface of the floor slab and the lower surface of the joists. The invention is characterized by comprising: an underfloor space blocking step, which provides an insulating / blocking section in which an insulating / blocking component having insulating properties that can be brought in through an access opening is arranged or filled so as to block the inflow of the hot or cold air flowing upward from the main beam into the space, with its lower end in contact with the floor slab and its upper end at approximately the same height as the lower surface of the main beam; a chamber section construction step, which forms the chamber section for which the hot or cold air flows, by bending an insulating plastic corrugated cardboard chamber component having insulating properties that can be folded into approximately a U-shape in cross-section, with the upper wall portion at approximately the same height as the lower surface of the main beam and the lower ends of both side walls in contact with the floor slab, and arranging it along approximately the entire length in the longitudinal direction of the joist to form a cylindrical shape, and providing openings in the upper wall portion at each of the main beams; and a recirculation opening construction step, which provides a recirculation opening in the floor material for circulating the hot or cold air into the room. [Effects of the Invention]

[0013] The present invention provides a floor radiant convection heating and cooling system or a floor radiant convection heating and cooling system installation method that allows for the easy and inexpensive installation of a floor radiant convection heating and cooling system in existing buildings that do not currently have a floor radiant convection heating and cooling system installed, such as existing evacuation shelters, gymnasiums, community centers, detached houses, apartment buildings, or office buildings, in floor structures that include flooring materials, joists, beams, supports, and floor slabs. This system quickly raises the indoor temperature to a comfortable level through radiation from flooring materials heated or cooled by hot or cold air from an air conditioner, and through convection caused by circulating the heated or cooled air back into the room. In particular, it provides the advantage of enabling the installation of a floor radiant convection heating and cooling system in gymnasiums and community centers that are intended to be evacuation shelters but do not yet have heating or cooling equipment, through a simple and inexpensive renovation.

[0014] Furthermore, in the floor radiant convection heating and cooling system or floor radiant convection heating and cooling system construction method of the present invention, the flow of hot and cold air is blocked by the heat insulation / blocking section and the chamber section in the space between the height of the lower surface of the main beam and the height of the upper surface of the floor slab. As a result, the hot and cold air that flows down from the air conditioner and flows through the chamber section is not allowed to flow in the vertical space other than the chamber section, from the upper surface of the floor slab to the height of the lower surface of the main beam, but can flow in the narrow vertical space from the floor material to a height above the lower surface of the main beam. This makes it possible to minimize the temperature change between the temperature of the hot and cold air in contact with the floor material and the temperature at the moment it flows down from the air conditioner, and further enhances the synergistic effect of radiation from the floor material and convection caused by the circulating hot and cold air. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram illustrating the indoor side of the floor radiant convection heating and cooling system of the present invention in plan view. [Figure 2] Figure 1 is a schematic diagram illustrating a plan view of an example of an insulation / blocking section with all flooring materials removed. [Figure 3] Figure 1 is a schematic diagram illustrating a plan view of the insulation and shielding section in another example, with all flooring materials removed. [Figure 4] It is a schematic explanatory view in plan view showing a state where all joists have been removed, in FIG. 2 [Figure 5] It is a schematic explanatory view in plan view showing a state where all joists have been removed, in FIG. 3 [Figure 6] It is a schematic explanatory view in side view along the A-A cross-section corresponding to an end portion of a support group aligned in a row in the longitudinal direction of a girt, in FIG. 1 [Figure 7] It is a schematic explanatory view showing a state before a chamber portion is installed, in FIG. 6 [Figure 8] It is a schematic explanatory view in plan view on the indoor side of a floor structure in a state where the floor radiant convection cooling and heating system of the present invention is not installed [Figure 9] It is a schematic explanatory view in plan view showing a state where all floor materials have been removed, in FIG. 8 [Figure 10] It is a schematic explanatory view in plan view showing a state where all joists have been removed, in FIG. 9 [Figure 11] It is a schematic explanatory view in side view along the B-B cross-section corresponding to an end portion of a support group aligned in a row in the longitudinal direction of a girt, in FIG. 8 [Figure 12] It is an explanatory view showing a state where a construction opening is provided in the floor material of FIG. 8 [Figure 13] These are perspective explanatory views of a rectangular parallelepiped heat insulation / shielding portion, wherein (a) is a perspective explanatory view of a form when the material has low flexibility, and (b) is a perspective explanatory view of a form when the material has high flexibility [Figure 14] These are explanatory views of the heat insulation / shielding portion in a rectangular parallelepiped form, wherein (a) is a partial explanatory view in the C-C cross-sectional view in FIG. 7, and (b) is an explanatory view in a cross-sectional view in the transverse direction of the rectangular parallelepiped heat insulation / shielding portion [Figure 15] These are explanatory views of the heat insulation / shielding portion in a substantially U-shaped form, wherein (a) is a partial explanatory view in the C-C cross-sectional view in FIG. 7 when the heat insulation / shielding portion is in the substantially U-shaped form, and (b) is an explanatory view in a cross-sectional view in the transverse direction of the substantially U-shaped heat insulation / shielding portion [Figure 16]The diagrams illustrate the configuration of the thermal insulation / insulation section in a laminated form. (a) is a partial diagram illustrating a cross-sectional view of the CC (Cross-Cross) section assuming that the thermal insulation / insulation section in Figure 7 is in a laminated form, and (b) is a diagram illustrating a cross-sectional view in the short-side direction of the laminated thermal insulation / insulation section. [Figure 17] This is an explanatory diagram of the floor structure in a state where the floor radiant convection heating and cooling system of the present invention has not been installed, and is a partial explanatory diagram of the DD cross-sectional view in Figure 11. [Figure 18] In the explanatory diagrams for the chamber section, (a) is a plan view diagram showing multiple chamber section components connected together, (b) is a side view diagram showing multiple chamber section components connected with their ends butted together, and (c) is a side view diagram showing multiple chamber section components connected with the upstream end resting on the downstream end. [Figure 19] These are cross-sectional diagrams of the chamber components viewed in the short-side direction. (a) is a cross-sectional diagram of the area with an opening, and (b) is a cross-sectional diagram of the area without an opening. [Figure 20] This is a flowchart illustrating the installation method for the floor radiant convection heating and cooling system of the present invention. [Figure 21] This is an explanatory diagram of the hot and cold air flow in a floor radiant convection heating and cooling system, showing the flow of hot and cold air in the state described in Figure 2. [Figure 22] This is an explanatory diagram of the hot and cold air flow in a floor radiant convection heating and cooling system, showing the flow of hot and cold air in the state described in Figure 6. [Modes for carrying out the invention]

[0016] The floor radiant convection heating and cooling system 1 or the floor radiant convection heating and cooling system installation method 50 of the present invention can be easily and inexpensively installed in the floor structure 2 of existing buildings where the floor radiant convection heating and cooling system 1 has not been installed, such as existing evacuation shelters, existing gymnasiums, existing community centers, existing detached houses, existing condominiums, or existing office buildings, as shown in Figures 8 to 11, for example, through renovation.

[0017] In the floor structure 2 where the floor radiant convection heating and cooling system 1 is not installed, for example, as shown in Figure 8, no air conditioner 20 is installed on the flooring material 7 in the room. As shown in Figure 9, when all the flooring material 7 is removed, the floor slab 3 is visible below the joists 6 that contact the underside of the flooring material 7 and support the flooring material 7, and below the main beams 5 that contact the underside of the joists 6 and support the joists 6 perpendicular to the joists 6. As shown in Figure 10, when all the joists 6 are removed, the support 4 and the floor slab 3 are visible below the main beams 5. As shown in Figure 11, there is a space between the flooring material 7 and the floor slab 3 in the vertical direction where the joists 6, the main beams 5 and the support 4 are provided.

[0018] Therefore, the floor structure 2 comprises a plurality of support members 4 suspended vertically on the floor slab 3, a plurality of elongated metal joists 5 supported by the support members 4 and arranged in parallel rows, and a plurality of elongated metal joists 6 that abut against the upper surface of the joists 5 and are arranged in parallel to and perpendicular to the joists 5, and abut against the lower surface of the flooring material 7 that constitutes the room and support the flooring material 7.

[0019] Next, the floor radiant convection heating and cooling system 1 of the present invention will be described. As shown in Figures 1 to 7, the floor radiant convection heating and cooling system 1 is a floor structure 2 comprising: a plurality of support bodies 4 vertically installed on a floor slab 3; a plurality of elongated metal joists 5 supported by the support bodies 4 and arranged in parallel rows; and a plurality of elongated metal joists 6 that abut against the upper surface of the joists 5 and are arranged in parallel and perpendicular to the joists 5, and abut against the lower surface of the flooring material 7 that constitutes the room and support the flooring material 7; a chamber portion 8 disposed on the lower side of one of the longitudinal sides of the joists 5 and in a direction perpendicular to the longitudinal direction of the joists 5, with its upper surface in contact with the lower surface of the joists 5, and having a cylindrical shape with at least an upper wall portion 23 and side wall portions 24 made of plate-shaped insulating material, which serves as a passage for hot and cold air from an air conditioner 20 installed in the room; and a cover that, in plan view, covers the area from the gap between the joists 5 excluding the chamber portion 8. - The space is formed by the width of the area and the height between the upper surface of the floor slab 3 and the lower surface of the main beam 5. An insulating / blocking section 9 made of an insulating material is provided to block the inflow of the hot and cold air flowing above the main beam 5. The lower end of the section is in contact with the floor slab 3 and the upper end is at approximately the same height as the lower surface of the main beam 5. In a plan view, all gaps between the main beams 5 are closed by the insulating / blocking section 9 and the chamber section 8, which are in contact with the lower surface of the main beams 5. Openings 10 are provided in the upper wall 23 of the chamber section 8 at each of the main beams 5. The hot and cold air that flows into the chamber section 8 from the air conditioner 20 flows out through the openings 10 between the main beams 5, flows between the floor material 7, the main beams 5 and the insulating / blocking section 9, and then flows back into the room through a recirculation port 21 provided in the floor material 7.

[0020] The chamber section 8 and the heat insulation / shielding section 9 are brought in and installed below the main beam 5 of the floor structure 2. To this end, as shown in Figure 12, during renovation, a portion of the flooring material 7 of the floor structure 2 is removed only for the time of construction to create a construction opening 40 in the flooring material 7, which is a roughly rectangular opening with a width X1 that is approximately the same as the length of the gap X between the joists 6 and a length Y1 that is approximately the same as the total length Y of the joists 6. By providing the construction opening 40, a transport opening 41 (41a~41d) surrounded by the four frames of the main beams 5 and the joists 6 appears below.

[0021] The aforementioned loading openings 41 (41a to 41d) are entrances for loading the chamber component 25, which is a component of the chamber section 8, or the insulation / insulation component 17, 18, and 19, which are components of the insulation / insulation section 9, downward from the main beam 5. There is one loading opening 41 between each of the main beams 5. For example, in the case shown in Figure 12, there are four gaps between the main beams 5, so there are four loading openings 41, numbered 41a to 41d.

[0022] Therefore, the heat insulation and shielding components 17, 18, 19a to 19g shown in Figure 13(a) or (b) are brought in through the loading openings 41a to 41d, and the chamber components 25a to 25d, which are components of the chamber section 8 shown in Figure 18, are brought in.

[0023] The aforementioned heat-insulating and blocking section 9 is provided in a space formed by an area that, in a plan view, covers at least the area from the gap between the main beams 5 excluding the chamber section 8, and the height between the upper surface of the floor slab 3 and the lower surface of the main beams 5, to block the inflow of the hot and cold air flowing above the main beams 5. It has a form in which its lower end is in contact with the floor slab 3 and its upper end is approximately the same height as the lower surface of the main beams 5, and is made of a material that has heat-insulating properties.

[0024] The form of the heat-insulating / insulating section 9, which has its lower end in contact with the floor slab 3 and its upper end approximately the same height as the lower surface of the main beam 5, can be either form A, which is arranged between the main beams 5 in a plan view along the longitudinal direction of the main beams 5, or form B, which is arranged along the longitudinal direction of the joists 6 perpendicular to the main beams 5 in a plan view. The following explanation will be based on form A.

[0025] In the case of form A, the heat insulating / insulating section 9, whose lower end is in contact with the floor slab 3 and whose upper end is approximately the same height as the lower surface of the main beam 5, has a height of H1 which is approximately the same as the vertical height H between the upper surface of the floor slab 3 and the lower surface of the main beam 5, as shown in Figures 6, 7, and 13 to 16; a horizontal length of W1 which is slightly longer than the length of the gap W between the main beams 5, as shown in Figures 4, 5, and 13 to 16; and a vertical length of L1 (L2 + L3) which is the total length obtained by subtracting the width of the chamber section 8 from the total length L in the longitudinal direction of the main beam 5, as shown in Figures 4 and 13. The heat insulating / insulating section 9 as a whole has the form of a long rectangular parallelepiped.

[0026] In the case of the above-mentioned form A, the heat insulating / insulating part 9 can be a rectangular parallelepiped form 9a formed in the shape of a rectangular parallelepiped from a material having heat insulating properties and flexibility, which is the heat insulating / insulating component 19, as shown in Figures 13 and 14; a substantially U-shaped form 9b formed by folding a heat insulating plastic corrugated cardboard, which is the heat insulating / insulating component 17, into a substantially U-shape in a longitudinal cross-sectional view, as shown in Figure 15; or a laminated form 9c formed by layering a heat insulating foam material, which is the heat insulating / insulating component 18, by spraying, as shown in Figure 16.

[0027] The rectangular parallelepiped shape 9a is made of a material that has thermal insulation properties. If the material is not flexible, it may be, for example, polystyrene foam or rigid polyurethane foam, and if the material is flexible, it may be, for example, polyethylene foam, glass wool or rock wool.

[0028] The rectangular parallelepiped shape 9a of the insulation / blocking section 9 only needs to be able to be brought in through the loading opening 41 (41a to 41d). For example, if the material is not flexible, it can be divided into lengths L3 to L8, each less than the length of the gap X between the joists 6 in the loading opening 41, as shown in Figure 13(a). If the material is flexible, it can be divided into lengths L2, which is longer than the length of the gap X between the joists 6 in the loading opening 41, as shown in Figure 13(b). Any shape is acceptable as long as the insulation / blocking section 9 can be brought in through the loading opening 41 into the space below the bottom surface of the main beam 5.

[0029] The thermal insulation / blocking section 9 of the rectangular parallelepiped shape 9a has a width W1 and a height H1, as shown in Figure 14(b), and is installed as shown in Figures 6, 7, and 14(a). After installation, the total length is L1, as shown in Figure 13. This fills the space consisting of the height between the lower surface of the main beam 5 and the upper surface of the floor slab 3, and the width excluding the chamber section 8 in a plan view, as shown in Figures 7 and 14(a). This closes the upper and side boundaries of the space, thereby reducing the space through which hot and cold air flows from a large space with a height H9 between the upper surface of the floor slab 3 and the lower surface of the flooring material 7, as shown in Figures 11 and 17, before the floor radiant convection heating and cooling system 1 was installed, to a space with a height H0 between the height of the lower surface of the main beam 5 and the lower surface of the flooring material 7, as shown in Figures 11 and 17.

[0030] The roughly U-shaped form 9b, which has its lower end in contact with the floor slab 3 and its upper end approximately the same height as the lower surface of the main beam 5, is a heat insulating / insulating component 17. For example, it has a form in which corrugated plastic is folded into a roughly U-shape in a vertical cross-sectional view. It is made of a bendable, flat, heat insulating material, such as corrugated plastic with heat-scribing lines or corrugated plastic with a hollow structure. Examples of materials for the corrugated plastic include polypropylene, polyethylene, polyvinyl chloride, or ABS resin. This makes it easy to bend the corrugated plastic in the desired direction at the desired location and maintain the folded shape. The heat insulating / insulating component 17 is brought in below the main beam 3 in a length that can be brought in through the loading opening 41 (41a~41d), and adjacent components are connected to each other to form a long, connected form with a U-shaped cross-section. Note that a hat shape with the base folded outward is also included in the roughly U-shaped form.

[0031] The aforementioned roughly U-shaped configuration 9b has a width W1 and a height H1, as shown in Figure 15(b), and is installed as shown in Figures 6, 7, and 15(a). The total length after installation is L1, although not shown in the figures. This allows the boundary of the upper surface and the boundary of the side of the space, which consists of the height between the lower surface of the main beam 5 and the upper surface of the floor slab 3, and the width excluding the chamber portion 8 in a plan view, to be closed, as shown in Figures 7 and 15(a). Thus, the space through which the hot and cold air flows can be reduced from a large space with a height H9 between the upper surface of the floor slab 3 and the lower surface of the flooring material 7, as shown in Figures 11 and 17, before the installation of the floor radiant convection heating and cooling system 1, to a space with a height H0 between the height of the lower surface of the main beam 5 and the lower surface of the flooring material 7, as shown in Figures 11 and 17.

[0032] The laminated form 9c, in which the lower end is in contact with the floor slab 3 and the upper end is approximately the same height as the lower surface of the main beam 5, is a form in which a heat insulating / insulating component 18, which is a foamed material having heat insulating properties, is laminated by spraying. Since the expansion ratio after foaming differs depending on the foamed material, the height H between the upper surface of the floor slab 3 and the lower surface of the main beam 5 is generally about 400 mm, for example, so 5 to 10 layers of spraying are used to laminate up to a height of about 400 mm. Therefore, the laminated form 9c is preferably made of a sprayable foamed material with heat insulating properties, such as spray-type urethane foam, polyisocyanurate foam, cellulose fiber, glass wool, polystyrene foam, etc.

[0033] As shown in Figure 16(b), the stacked configuration 9c has a width W1 and a height H1, and is installed as shown in Figures 6, 7, and 16(a). The total length after installation is L1, although not shown in the figures. This fills the space consisting of the height between the lower surface of the main beam 5 and the upper surface of the floor slab 3, and the width excluding the chamber section 8 in a plan view, as shown in Figures 7 and 16(a). This closes the upper and side boundaries of the space, thereby reducing the space through which hot and cold air flows from a large space with a height H9 between the upper surface of the floor slab 3 and the lower surface of the flooring material 7, as shown in Figures 11 and 17, before the installation of the floor radiant convection heating and cooling system 1, to a space with a height H0 between the height of the lower surface of the main beam 5 and the lower surface of the flooring material 7, as shown in Figures 11 and 17.

[0034] In a typical floor structure 2, for example, the height H is approximately 400 mm, the height H0 is approximately 80 mm, and the height H9 is approximately 480 mm. Therefore, the rectangular parallelepiped shape 9a, the roughly U-shaped shape 9b, and the stacked shape 9c of the heat insulation / blocking section 9 can all reduce the space through which hot and cold air flows by approximately 83%, narrowing it to approximately 17%. This allows the hot and cold air to reach the floor material 7 without significantly changing the temperature of the hot and cold air immediately after it flows out of the air conditioner 20.

[0035] The insulation and shielding section 9 of form B, which is arranged along the longitudinal direction of the joist 6 perpendicular to the main beam 5 in a plan view, can also be adapted to the insulation and shielding section 9 of form A, which is arranged between the main beams 5 in a plan view, as described above. This can be a rectangular parallelepiped form 9a formed in a rectangular parallelepiped shape from a material having thermal insulation properties and flexibility, which is the insulation and shielding component 19; a substantially U-shaped form 9b, as shown in Figure 15, in which thermal insulation plastic corrugated cardboard, which is the insulation and shielding component 17, is folded into a substantially U-shape in a longitudinal cross-section view; or a laminated form 9c, as shown in Figure 16, in which thermal insulation foam material, which is the insulation and shielding component 18, is laminated by spraying.

[0036] Next, as shown in Figures 2 and 6, the chamber section 8 is positioned on the lower side of one side in the longitudinal direction of the main beam 5, and in a direction perpendicular to the longitudinal direction of the main beam 5, with its upper surface in contact with the lower surface of the main beam 5. It is a cylindrical chamber section, with at least the upper wall section 23 and the side wall sections 24 made of plate-shaped insulating material, and serves as a passage for hot and cold air from an air conditioner 20 installed in the room. As shown in Figure 18, the chamber section 8 has a height H1 that is approximately the same as the height H between the upper surface of the floor slab 3 and the lower surface of the main beam 5 in the vertical direction, a horizontal length X2 that is shorter than the length of the gap X between the joists 6 in a direction perpendicular to the longitudinal direction of the main beam 5, and a vertical length Y2 that is approximately the same as the total length Y in the longitudinal direction of the joists 6.

[0037] Furthermore, regarding the bottom wall of the chamber section 8, generally, a moisture-proof sheet is laid on top of the existing floor slab 3, and then insulation material such as extruded polystyrene foam or rigid urethane foam is laid on top of that. Therefore, the bottom wall of the chamber section 8 utilizes the existing insulation material. As a result, the cylindrical shape of the chamber section 8 is composed of the upper wall section 23, the two opposing side wall sections 24, and the floor slab 3 on which the insulation material is laid.

[0038] The chamber section 8 is a flow path for hot and cold air from the air conditioner 20, and the upper wall section 23 is provided with openings 10 (10a to 10d) between the main beams 5 to allow the hot and cold air to flow in.

[0039] Therefore, the chamber portion 8 is rigid and can maintain its shape as a flow path for hot and cold air, and since it is made of a material with thermal insulation properties, it can prevent changes in the temperature of the flowing hot and cold air. The material used for the chamber portion 8 may be a material that has both rigidity and thermal insulation properties, or it may be a rigid, substantially flat material such as a hard synthetic resin, a non-metallic material such as aluminum, or a metal such as iron, to which a sheet-like thermal insulation material such as a foamed polyethylene sheet, a foamed polyurethane sheet, or a glass fiber sheet may be attached.

[0040] Furthermore, as shown in Figure 18, the tip of the chamber component 18a, which is the tip of the chamber section 8, is closed with a lid, an inlet 11 is provided on the upper wall 23 of the chamber component 18d, which is located directly below the air conditioner 20, for allowing hot or cold air from the air conditioner 20 to flow down, and openings 10 (10a to 10d) are provided on the upper wall 23 of the chamber components 18a, 18b, 18c, and 18d, which are located between the main beams 5, for example, for allowing hot or cold air to flow out at approximately the same height as the lower surface of the main beams 5.

[0041] The chamber components 25 are brought in through the loading opening 41 and arranged in rows with the upper and lower ends of the side wall portions 24 in contact with the upper surface of the floor slab 3 and the lower surface of the main beam 5. For example, as shown in Figure 18(b), the chamber components 25 may be arranged in rows with the longitudinal ends of the chamber portions 8 of the chamber components 25 butting together, or as shown in Figure 18(c), the chamber components 25 may be arranged so that the ends of the upstream chamber components 25 rest on the ends of the downstream chamber components 25 due to the flow of hot or cold air. Furthermore, the chamber components 25 may be folded into a roughly U-shape, either before or after folding, as long as the size allows them to be loaded through the loading opening 41.

[0042] From the above, in a plan view, all gaps between the main beams 5 are closed by the heat insulation / blocking section 9 and the chamber section 8 at approximately the same height as the lower surface of the main beams 5. This prevents the hot and cold air flowing between the lower surface of the main beams 5 and the lower surface of the flooring material 7 from flowing below the lower surface of the main beams 5, and restricts the range in which the hot and cold air can flow below the main beams 5 to only the cylindrical interior of the chamber section 8.

[0043] Next, the floor radiant convection heating and cooling system construction method 50 of the present invention will be described. As shown in Figure 20, the floor radiant convection heating and cooling system construction method 50 is a floor structure 2 comprising a plurality of support bodies 4 vertically installed on a floor slab 3, a plurality of elongated metal joists 5 supported by the support bodies 4 and arranged in parallel rows, and a plurality of elongated metal joists 6 that abut against the upper surface of the joists 5 and are arranged in parallel and perpendicular to the joists 5, and abut against the lower surface of the floor material 7 that constitutes the room and support the floor material 7, and the above substantially the entire range of the gap between two predetermined adjacent joists 6 in a plan view A construction opening construction step 51 is made in which a construction opening 40 is made in the floor material 7 corresponding to the above, and a plurality of loading openings 41 surrounded by the main beam 5 and the joist 6 are made inside the construction opening 40, and in the space which is made up of an area that covers at least the area excluding the chamber section 8 which is arranged in a direction substantially perpendicular to the longitudinal direction of the main beam 5 and forms a flow path for hot and cold air from the air conditioner 20 installed in the room from the gap between the main beams 5 in a plan view, and the height between the upper surface of the floor slab 3 and the lower surface of the main beam 5, An underfloor space blocking step 52 is provided with an underfloor space blocking step 52, which has an insulating / blocking section 9 provided by insulating / blocking components 17, 18, and 19 having insulating properties that can be brought in through the aforementioned loading opening 41, and is arranged or filled so that the lower end is in contact with the floor slab 3 and the upper end is at approximately the same height as the lower surface of the main beam 5, in order to block the inflow of the hot and cold air flowing above the main beam 5 into the space, and an insulating chamber structure made of plastic corrugated cardboard that is sized to be brought in through the loading opening 41 and can be folded into approximately a U-shape in cross-section. The chamber section construction step 53 involves bending the member 25 into a roughly U-shape, with the upper wall portion 23 at approximately the same height as the lower surface of the main beam 5, and the lower ends of both side wall portions 24 in contact with the floor slab 3, and arranging it along approximately the entire length of the joist 6 to form a cylindrical shape, and providing openings 10 in the upper wall portion 23 at intervals between the main beams 5 to form the chamber section 8 for flowing hot and cold air; and providing a recirculation port construction step 54 involves providing a recirculation port in the floor material for circulating the hot and cold air inside the chamber.

[0044] Furthermore, the floor radiant convection heating and cooling system installation method 50 includes a construction opening closing step 55 for closing the construction opening 40, as shown in Figure 20.

[0045] The floor radiant convection heating and cooling system construction method 50 is a construction method used for a floor structure 2 comprising: a plurality of support members 4 suspended on a floor slab 3; a plurality of elongated metal joists 5 supported by the support members 4 and arranged in parallel rows; and a plurality of elongated metal joists 6 that abut against the upper surface of the joists 5 and are arranged in parallel to and perpendicular to the joists 5, and abut against the lower surface of the flooring material 7 that constitutes the room and support the flooring material 7.

[0046] Next, the construction opening construction step 51 will be described. The construction opening construction step 51 is a step in which a construction opening 40 is provided in the floor material 7 that corresponds to substantially above the entire range of the gap between two predetermined adjacent joists 6 in a plan view, and a plurality of loading openings 41 enclosed by the main beam 5 and the joists 6 are made inside the construction opening 40. That is, in a plan view, as shown in Figure 12, a construction opening 40 is provided in the floor material 7 that corresponds to the range in which the elongated flow channel chamber section 8 is arranged, with the length of the opening being substantially the same as the total length Y of the joists 6 and the width of the gap X between the joists 6 being substantially the same as the width of the gap X between the joists 6, and a plurality of loading openings 41 (41a to 41d) enclosed by the frame of the main beam 5 and the joists 6 are made inside the construction opening 40.

[0047] The area in which the chamber portion 8 is installed is the same direction as the longitudinal direction of the joist 6 from the air conditioner 20. When the air conditioner 20 is installed at one end of the main beam 5, it is installed at one end of the main beam 5 as shown in Figure 12. When the air conditioner 20 is installed closer to the center of the main beam 5 (not shown), it is installed closer to the center of the main beam 5.

[0048] From the aforementioned loading opening 41 (41a to 41d), the insulating and insulating components 17, 18, 19a to 19g, which are components of the insulating and insulating section 9 (9a to 9c) as shown in Figure 13(a), Figure 14, Figure 15, or Figure 16, or the chamber component 25, which is a component of the chamber section 8 as shown in Figure 18, are loaded downward from the lower surface of the main beam 5.

[0049] Next, the underfloor space blocking step 52 will be described. The underfloor space blocking step 52 is a step in which an insulating / blocking section 9 is provided in a space that is formed by a width that covers at least the area excluding the chamber section 8 which is arranged in a direction substantially perpendicular to the longitudinal direction of the main beams 5 and forms a flow path for hot and cold air from an air conditioner 20 installed in the room through the gap between the main beams 5 in a plan view, and the height between the upper surface of the floor slab 3 and the lower surface of the main beams 5, wherein insulating / blocking components 17, 18, and 19 that have insulating properties and can be brought in through the loading opening 41 are arranged or filled so as to block the inflow of the hot and cold air flowing above the main beams 5 into the space, with the lower end in contact with the floor slab 3 and the upper end at substantially the same height as the lower surface of the main beams 5.

[0050] In other words, the lower end of the insulation and shielding section 9 is at the same height as the upper surface of the floor slab 3, the upper end is at approximately the same height as the lower surface of the main beam 5, the shape at the upper end is approximately flat, and the area of ​​the approximately flat surface at the upper end is large enough to cover approximately the entire range of gaps between all the main beams 5, excluding the area where the chamber section 8 for flowing hot and cold air is installed, and the insulation and shielding components 17, 18, and 19, which are components of the insulation and shielding section 9, are brought in through the loading opening 41 to install multiple insulation and shielding sections 9.

[0051] For example, in the case of the rectangular parallelepiped shape 9a of the heat insulating / insulating part 9, if the material is flexible and easily bent into a small arc, a long heat insulating / insulating part 9 (heat insulating components 19a, 19g) is used, for example as shown in Figure 13(b). If the material is not flexible, the heat insulating / insulating part 9 (heat insulating components 19b~19g) is divided into lengths less than the length of the gap X between the joists 6, for example as shown in Figure 13(a). The heat insulating / insulating components 19 are then pushed in from the loading opening 41 toward the space below the lower surface of the main beam 5, along the longitudinal direction of the main beam 5, so that there are no gaps between the support members 4.

[0052] Since the distance between the upper surface of the floor slab 3 and the lower surface of the main beam 5 is approximately 400 mm, a worker can crawl underneath and push in the rectangular parallelepiped shape 9a and the roughly U-shaped shape 9b of the insulation / blocking section 9. Furthermore, even when the insulation / blocking section 9 is in the laminated shape 9c, a worker can crawl underneath and safely perform the spraying work while ventilating the room.

[0053] Next, the chamber construction step 53 will be described. The chamber construction step 53 is a step in which a chamber component 25 made of plastic corrugated cardboard with heat insulation properties, which is sized to be brought in through the loading opening 41 and can be folded into a roughly U-shape in cross-section, is folded into a roughly U-shape with the upper wall portion 23 at roughly the same height as the lower surface of the main beam 5 and the lower ends of both side wall portions 24 in contact with the floor slab 3, and is arranged along approximately the entire length in the longitudinal direction of the joist 6 to form a cylindrical shape, and openings 10 are provided in the upper wall portion 23 at intervals between the main beams 5, thereby forming the chamber portion 8 for which hot and cold air flows.

[0054] The chamber components 25 have a shape formed by folding plastic corrugated cardboard into a roughly U-shape in cross-section, and are made of a bendable flat or coil-shaped material with heat insulating properties. Examples include plastic corrugated cardboard with heat-scribing lines and plastic corrugated cardboard with a hollow structure. Examples of the material for the plastic corrugated cardboard include polypropylene, polyethylene, polyvinyl chloride, or ABS resin. This makes it easy to fold the plastic corrugated cardboard in the desired direction at the desired location and maintain the folded shape. The chamber components 25 made of plastic corrugated cardboard are brought in below the main beam 5 in a length that can be brought in through the loading opening 41 (41a to 41d), and adjacent components are connected to each other to form a long, connected U-shaped cross-section.

[0055] Furthermore, as shown in Figure 18(b), for example, the chamber components 25 may be arranged in a row with their longitudinal ends of the chamber portion 8 butting together, or as shown in Figure 18(c), they may be arranged in a manner such that the flow of hot and cold air causes the end of the upstream chamber component 25 to rest on the end of the downstream chamber component 25. Also, the chamber components 25 may be folded into a roughly U-shape, and the chamber components 25 may be brought in before folding or after folding, as long as the size allows them to be brought in through the loading opening 41.

[0056] Next is the construction opening closing step 55. In the construction opening closing step 55, the floor material is restored to its original state in order to close the construction opening 40. At this time, a hole is made in the floor material 7 for the conduit of hot and cold air from the air conditioner 20 to the chamber section 8.

[0057] Next, the flow of hot and cold air will be explained. As shown in Figure 20, the hot and cold air discharged from the air conditioner 20 flows through the cylindrical body of the chamber section 8 in the direction of arrow M, and then flows out through one of the openings 10a to 10d between the main beams 5, as shown in Figure 16 or Figure 17. After that, it flows between the main beams 5 in the direction of arrow N along the longitudinal direction of the main beams 5, rising to the height of the joists 6 arranged above the main beams 5, and then flows between the joists 6 in the direction of arrow Q along the longitudinal direction of the joists 6, warming or cooling the flooring material 7. When the flooring material 7 is warmed or cooled, heat is transferred from the surface of the flooring material 7 to the indoor air by radiation, warming or cooling the temperature of the room.

[0058] Then, the heated or cooled air from the flooring material 7 flows out into the room through a recirculation port 21 located at a distance from the chamber 8, as shown in Figure 1, and directly heats or cools the room air through forced convection.

[0059] Therefore, the floor radiant convection heating and cooling system 1 or the floor radiant convection heating and cooling system installation method 50 of the present invention can raise the room temperature to a set temperature in a short time by radiation from the floor material 7, which is heated or cooled by hot or cold air flowing from an air conditioner 20 installed in the room through the narrow space between the floor material 7 and the main beam 5 below the floor material 7, and by convection caused by the hot or cold air flowing out from the recirculation port 21. [Explanation of symbols]

[0060] 1. Floor radiant convection heating and cooling system 2 floor structure 3 Floor slab 4 Support 5. Obiki 6 joists 7 Flooring 8 Chamber section 9. Insulation and shielding section 9a Cuboid shape 9b U-shaped form 9c Laminated form 10 Openings 11 Inlet 17. Insulation and shielding components 18. Insulation and shielding components 19a~19g Thermal insulation and shielding components 20 Air conditioner 21 Circulation port 23 Upper wall 24 Side wall section 25 Chamber components 40 Construction openings 41 Loading opening 50. Installation Method for Floor Radiant Convection Heating and Cooling Systems 51 Construction opening construction steps 52 Underfloor space isolation step 53 Chamber section construction steps 54 Steps for constructing the return port 55 Construction opening closing step H Height L total length X Gap Y Total length W gap

Claims

1. Multiple supports suspended on the floor slab, Supported by the aforementioned support and arranged in parallel rows, a plurality of elongated metal beams, A floor structure comprising: a plurality of elongated metal joists that abut against the upper surface of the main beam and are arranged in a direction perpendicular to and parallel to the main beam, and that abut against the lower surface of the flooring material constituting the room and support the flooring material, A chamber section is provided on the lower side of one of the longitudinal sides of the main beam, and is arranged in a direction perpendicular to the longitudinal direction of the main beam, with its upper surface in contact with the lower surface of the main beam, and is cylindrical in shape, consisting of a plate-shaped insulating material forming the upper wall and both side walls, and the floor slab, and serves as a passage for hot and cold air from an air conditioner installed in the room. The structure comprises a space comprising an area that, in a plan view, covers at least the area from the gap between the main beams excluding the chamber portion, and the height between the upper surface of the floor slab and the lower surface of the main beams, and a heat insulating / blocking section made of a heat insulating material, provided to block the inflow of the hot and cold air flowing upward from the main beams, with its lower end in contact with the floor slab and its upper end at approximately the same height as the lower surface of the main beams, In a plan view, all gaps between the main beams are closed by the heat insulation / blocking section and the chamber section, which are in contact with the lower surface of the main beams. A floor radiant convection heating and cooling system characterized by providing openings in the upper wall of the chamber section at each interval between the main beams, allowing the hot or cold air that flows into the chamber section from the air conditioner to flow out through the openings between the main beams, and after flowing between the floor material, the main beams, and the insulation / shielding section, to recirculate into the room through a recirculation port provided in the floor material.

2. The floor radiant convection heating and cooling system according to claim 1, characterized in that the heat insulation / blocking section is a rectangular parallelepiped formed from a material having heat insulation and flexibility, which is a heat insulation / blocking component; a roughly U-shaped form obtained by folding a plastic corrugated cardboard with heat insulation properties, which is a heat insulation / blocking component, into a roughly U-shape in a longitudinal cross-section view; or a laminated form obtained by spraying and laminating a foamed material with heat insulation properties, which is a heat insulation / blocking component.

3. Multiple supports suspended on the floor slab, Supported by the aforementioned support and arranged in parallel rows, a plurality of elongated metal beams, A floor structure comprising: a plurality of elongated metal joists that abut against the upper surface of the main beam and are arranged in a direction perpendicular to and parallel to the main beam, and that abut against the lower surface of the flooring material constituting the room and support the flooring material, A construction opening construction step involves creating a construction opening in the flooring material that corresponds to substantially above the entire range of the gap between two predetermined adjacent joists in a plan view, and revealing a plurality of loading openings enclosed by the main beam and the joists inside the construction opening, An underfloor space blocking step is provided, which provides an insulating / blocking component that can be brought in through the loading opening, in a space formed by an area that covers at least the area excluding the chamber portion arranged in a direction substantially perpendicular to the longitudinal direction of the main beams, which forms a flow path for hot and cold air from an air conditioner installed in the room through the gap between the main beams in a plan view, and the height between the upper surface of the floor slab and the lower surface of the main beams, wherein the insulating / blocking component is arranged or filled so that the lower end is in contact with the floor slab and the upper end is at substantially the same height as the lower surface of the main beams, in order to block the inflow of the hot and cold air flowing above the main beams into the space, A chamber construction step to form the chamber section for circulating hot and cold air, comprising: bending a thermally insulating plastic corrugated cardboard chamber component, which is sized to be brought in through the aforementioned loading opening and can be folded into a roughly U-shape in cross-section, so that the upper wall portion is at roughly the same height as the lower surface of the main beam and the lower ends of both side walls are in contact with the floor slab, and arranging it along approximately the entire length in the longitudinal direction of the joist to form a cylindrical shape, and providing openings in the upper wall portion at each of the main beams, A recirculation port installation step involves providing a recirculation port in the floor material for circulating the hot or cold air within the room, A method for constructing a floor radiant convection heating and cooling system, characterized by comprising the following features.

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