JP2020165542A - Floor heating panel, floor structure and manufacturing method for pipe member - Google Patents

Abstract

To provide a floor structure capable of further improving performance, and a manufacturing method of a pipe member.SOLUTION: A flow passage cross-sectional area of a pipe member 6 is 22.5 mm2 or more. Consequently, a heat medium can easily flow, so that a heat dissipation ratio to a heat dissipation surface can be improved. A circumferential stress is 1.2 MPa or less. Consequently, the strength of the pipe member 6 used for a floor heating panel 100 can be sufficiently ensured. A ratio of a wall thickness to an outer diameter of the pipe member 6 is 19% or more and 25% or less. By setting the wall thickness ratio to 25% or less, the wall thickness of the pipe member can be reduced. By making the pipe member 6 thin in this way, the heat of the heat medium can be easily transferred to the outside of the pipe member 6. Therefore, the heat dissipation performance of the floor heating panel 100 can be improved. Also, by setting the wall thickness ratio to 19% or more, sufficient strength can be secured.SELECTED DRAWING: Figure 2

Description

The present invention relates to a floor structure and a method for manufacturing a pipe member.

Conventionally, as a floor heating panel laid on the floor surface for heating a room of a house or the like, the one described in Patent Document 1 is known. The floor heating panel includes a base member that spreads out in a flat plate shape, and a plurality of pipe members that are provided on the base member and allow heat media to flow. As the heat medium circulates inside the heat medium, heat is transferred to the base member through the tube wall of the tube member. As a result, the floor surface is heated.

Japanese Unexamined Patent Publication No. 2004-271015

Here, further improvement in the performance of the floor heating panel is required. That is, while improving the heat dissipation performance of the floor heating panel with respect to the amount of heat input, characteristics such as structural strength are also required.

An object of the present invention is to provide a floor structure capable of further improving performance and a method for manufacturing a pipe member.

The floor heating panel according to one aspect of the present invention is a floor heating panel including a base member spreading in a flat plate shape and a plurality of pipe members provided on the base member for circulating a heat medium, and the thickness of the base member. Is 11 mm or more and 13 mm or less, the outer diameter of the pipe member is 8.5 mm or less, the flow path cross-sectional area of the pipe member is 22.5 mm ² or more, and the circumferential stress is 1.2 MPa or less. The ratio of the wall thickness to the outer diameter of the pipe member is 25% or less.

In this floor heating panel, the pipe member is provided on the base member and is a member for circulating a heat medium. The thickness of the base member is 11 mm or more and 13 mm or less so that heat is not released to the lower surface side and can be folded. The outer diameter of the tube member is 8.5 mm or less with respect to the thickness of such a base member. As a result, the heat dissipation ratio to the heat dissipation surface can be improved by separating the outer peripheral surface of the pipe member from the lower surface of the base member, which is a path for heat to escape. The flow path cross-sectional area of the pipe member is 22.5 mm ² or more. As a result, the heat medium can easily flow, so that the heat dissipation ratio to the heat dissipation surface can be improved. The circumferential stress is 1.2 MPa or less. As a result, the strength can be sufficiently ensured as a pipe member used for the floor heating panel. The ratio of the wall thickness to the outer diameter of the pipe member is 25% or less. By setting the wall thickness ratio to 25% or less, the wall thickness of the pipe member can be reduced. By making the tube member thin in this way, the heat of the heat medium can be easily transferred to the outside of the tube member. Therefore, the heat dissipation performance of the floor heating panel can be improved. From the above, it is possible to further improve the performance of the floor heating panel.

The floor structure according to one aspect of the present invention includes the above-mentioned floor heating panel, a slab on which the floor heating panel is placed, and a resin layer formed on the lower surface of the floor finishing material on the upper side of the floor heating panel. Be prepared.

This floor structure has a slab on the lower side of the floor heating panel and a resin layer formed on the lower surface of the floor finishing material on the upper side of the floor heating panel. When the slab is formed on the lower side, the heat of the pipe member easily escapes to the lower surface side. Further, since the resin layer functions as a heat insulating material, heat dissipation to the upper surface side of the floor finishing material is likely to be hindered. By using the floor heating panel of the present invention for such a structure, heat can be effectively dissipated to the upper surface side of the floor finishing material.

The method for manufacturing a pipe member according to one aspect of the present invention is a method for manufacturing a pipe member for a floor heating panel provided on a plurality of base members spreading in a flat plate shape and circulating a heat medium, and the type of the pipe member is selected. The selection process, the setting process for setting the outer diameter and inner diameter so that the wall thickness is thinner than the reference dimensions set for the type of pipe member selected in the selection process, and the outside set in the setting process. It comprises a forming step of forming a tube member having a diameter and an inner diameter.

This method for manufacturing a pipe member includes a setting step of setting an outer diameter and an inner diameter so that the wall thickness becomes thinner than the reference dimensions set in the pipe member of the type selected in the selection step. By setting based on the reference dimensions, the pipe member can be easily and surely thinned.

In the setting process, the outer diameter of the reference dimension may be maintained and the inner diameter may be larger than the reference dimension. By maintaining the outer diameter of the reference position in this way, the size of the groove portion of the base member can be set to a size conforming to the existing reference dimensions. In this case, the existing pipe member in the existing base member can be easily replaced with the thin-walled pipe member according to the present embodiment. Further, as the inner diameter is increased to make the wall thinner, the flow path area of the heat medium can be increased. Therefore, the heat transfer efficiency of the heat medium to the tube member can be improved by allowing the heat medium to flow smoothly.

According to the present invention, it is possible to provide a floor structure capable of further improving performance and a method for manufacturing a pipe member.

It is a top view which shows the floor heating panel which concerns on embodiment of this invention. It is sectional drawing along the line II-II of FIG. It is the schematic sectional drawing which shows the floor structure constructed by using the said floor heating panel. It is sectional drawing which shows each dimension of a pipe member. It is a conceptual diagram which shows the setting method of the dimension based on the reference dimension set for the type of a pipe member. It is a conceptual diagram which shows the setting method of the dimension based on the reference dimension set for the type of a pipe member. It is a conceptual diagram which shows the setting method of the dimension based on the reference dimension set for the type of a pipe member. It is a table which shows concretely the dimensions and various parameters which can be adopted in a setting process. It is a table which shows concretely the dimensions and various parameters which can be adopted in a setting process. It is a table which shows concretely the dimensions and various parameters which can be adopted in a setting process. It is a table which shows concretely the dimensions and various parameters which can be adopted in a setting process. It is a figure which shows the installation structure at the time of measurement of the floor heating panel which concerns on Example. It is a table which shows the experimental result. It is a graph which shows the experimental result of Example 1. FIG. It is a graph which shows the experimental result of Example 2. It is a graph which shows the experimental result of the comparative example 1. FIG. It is a graph which shows the experimental result of the comparative example 2.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 1 is a plan view showing a floor heating panel according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. The floor heating panel 100 shown in FIG. 1 is a panel having excellent heat dissipation efficiency and high output, and can be laid on the floor, wall, or ceiling as a functional base material. The floor heating panel 100 is used as heating by circulating a heat medium. The floor heating panel 100 is laid on a floor base made of structural plywood such as veneer, particle board, concrete slab, or the like. Further, a floor finishing material (finishing material) such as flooring is arranged on the upper surface of the floor heating panel 100. As the floor finishing material, for example, so-called flooring using various natural woods such as matoa, teak, oak, oak, cherry, cypress, maple, and urin on the surface may be used.

From the viewpoint of workability, the floor heating panel 100 according to the present embodiment may be formed in a rectangular shape (square or rectangular). The floor heating panel 100 can be designed in various sizes in consideration of the installation location, but in order to correspond to the dimensional design of the living room floor, the length (width) of one side is about 500 to 4000 mm, and the length of the other side. The (length) may be set to about 500 to 4000 mm, and the thickness may be set to about 5 to 30 mm. Then, from the viewpoint of forming a plurality of circulation paths by using the header 7 described later, the plane area may be designed to be 0.5 to 12 m ² . A plurality of floor heating panels 100 may be used depending on the size of the floor to be laid.

The floor heating panel 100 includes a base member 1, a joist member 3, a pipe member 6, a header 7, and a heat radiating sheet 8 (see FIG. 2). In this embodiment, the X-axis direction and the Y-axis direction are set with respect to the direction parallel to the plane of the floor heating panel 100. The Y-axis direction is a direction orthogonal to the X-axis direction.

The base member 1 is a member that spreads like a flat plate. The base member 1 is composed of a plate-shaped member having a rectangular shape in a plan view. The base member 1 includes edge portions 1a and 1b facing each other in the Y-axis direction, and edge portions 1c and 1d facing each other in the X-axis direction. The edge portion 1a extends straight in parallel with the X-axis direction on the positive side in the Y-axis direction. The edge portion 1b extends straight in parallel with the X-axis direction on the negative side in the Y-axis direction. The edge portion 1c extends straight in parallel with the Y-axis direction on the negative side in the X-axis direction. The edge portion 1d extends straight in parallel with the Y-axis direction on the positive side in the X-axis direction.

The base member 1 may be made of a foamed resin molded body. The foamed resin molded product includes a rigid polyurethane foam, a rigid polyethylene foam, a rigid polypropylene foam, a polystyrene foam, a phenol resin foam, a rigid polyvinyl chloride foam, a polymethylmethacrylate foam, a polycarbonate foam, and a polyphenylene oxide. Examples include foams, foams of polystyrene and polyethylene mixtures, and the like.

The base member 1 may be configured by, for example, arranging a plurality of small pieces formed in a rectangular shape having an elongated planar shape along the width of the floor heating panel 100 and in the length direction of the floor heating panel 100. The length and thickness of each piece of the base member 1 may be designed according to the width and thickness of the floor heating panel 100, respectively. The base member 1 may be divided to form the floor heating panel 100 in a folding structure.

The joist member 3 is a member provided on the base member 1, extending in the Y-axis direction, and being spaced apart in the X-axis direction. The joist members 3 are arranged in a state of being embedded in the base member 1 at predetermined intervals along the X-axis direction. The joist member 3 is a small split-shaped member for fixing the floor heating panel 100 by using screws or nails when the floor base is made of wood and supporting a vertical load applied from above. The joist member 3 may be made of wood such as cedar, cherry tree, cypress, lauan and plywood, or a hard foaming material made of resin. The length and thickness of the joist member 3 are designed according to the above-mentioned width and thickness of the floor heating panel 100, respectively, and in the present embodiment, the width (dimension in the X-axis direction) of the joist member 3 is 30. It may be set to about 60 mm.

In the base member 1, the joist members 3A and the joist members B are alternately provided along the X-axis direction. The joist member 3A and the joist member 3B may be provided at equal pitches along the X-axis direction, but may be provided at different pitches. In the region on the positive side in the Y-axis direction from the central position, the joist member 3A extends in the Y-axis direction from the positive edge portion 1a in the Y-axis direction of the base member 1 to the front of the central position. In the region on the positive side in the Y-axis direction from the central position, the joist member 3B extends in the Y-axis direction from the central position of the base member 1 to the front of the positive edge portion 1a in the Y-axis direction of the base member 1. .. In the region on the negative side in the Y-axis direction from the central position, the joist member 3A extends in the Y-axis direction from the central position of the base member 1 to the front of the edge portion 1b on the negative side in the Y-axis direction. In the region on the negative side in the Y-axis direction from the center position, the joist member 3B extends in the Y-axis direction from the edge 1b on the negative side in the Y-axis direction of the base member 1 to the front of the center position of the base member 1. ..

The pipe member 6 is provided on the base member 1 and is a member for circulating a heat medium. A plurality of tube members 6 are provided in parallel with each other so as to be embedded in the base member 1. As shown in FIG. 2, the pipe member 6 is embedded in the base member 1 in a state of being in contact with the heat radiating sheet 8 by utilizing the groove 1e formed on the surface of the base member 1. As the pipe member 6, a cross-linked polyethylene pipe, a polybutene pipe, a polypropylene pipe, a polyethylene pipe, a copper pipe, a resin pipe having a metal wire embedded in a peripheral surface, or the like can be used. Hot water is adopted as the heat medium flowing in the pipe member 6. The size of the pipe member 6 will be described later.

The pipe member 6 is stretched over substantially the entire area of the base member 1. The pipe member 6 is arranged linearly along the Y-axis direction in the floor heating panel 100. Further, the pipe member 6 is arranged so as to be folded back at the edge portions 1a and 1b on both end sides in the Y-axis direction and the central position. That is, the floor heating panel 100 includes an arrangement pattern of the pipe members 6 in which a plurality of rows of the pipe members 6 arranged in a straight line are arranged in parallel.

The header 7 is a device that is connected to the pipe member 6 and supplies a heat medium to the pipe member 6. The header 7 is arranged near the corner of the floor heating panel 100. A plurality of pipe members 6 are connected to the header 7, and form a hot water circulation path of a plurality of systems (plural circuits). By configuring a plurality of sets of circulation paths, it is possible to reduce the temperature drop of hot water in each system, dissipate heat uniformly in the entire panel, and increase the output.

The heat radiating sheet 8 is a member that transfers the heat of the pipe member 6 heat medium to the floor finishing material side. The heat radiating sheet 8 is a flexible film or sheet having a thickness of 30 to 150 μm and excellent thermal conductivity, for example, a metal foil such as aluminum foil, tin foil, copper foil, stainless steel foil, or a metal woven fabric. It is composed of a cloth, a non-woven fabric, a resin film or a resin sheet, or a laminated sheet in which these are combined.

The heat radiating sheet 8 is attached to the surfaces of the base member 1 and the joist member 3 with an adhesive. As the adhesive, ethylene / acrylic acid copolymer, ethylene / vinyl acetate copolymer, ethylene / glycidyl acrylate copolymer, ethylene / maleic anhydride copolymer, polyethylene acrylic acid graft copolymer, polyethylene anhydrous Examples thereof include an adhesive or an adhesive film made of a thermoplastic resin such as a maleic acid graft copolymer or a thermosetting resin such as an epoxy resin, a urethane resin or a phenol resin. The base member 1 and the joist member 3 are integrated by a heat radiating sheet 8 attached to their surfaces. It should be noted that the adhesive material is not particularly limited as long as it has sufficient strength to be integrated.

FIG. 3 is a schematic cross-sectional view showing a floor structure 200 constructed by using the floor heating panel 100 described above. The floor structure 200 includes a floor heating panel 100, a slab 201, a resin layer 202, and a floor finishing material 203. The floor heating panel 100 is a panel having the structure described above. The slab 201 is a floor member made of concrete. The slab 201 is a member on which the floor heating panel 100 is placed. The floor heating panel 100 is placed directly on the upper surface of the slab 201. The resin layer 202 is a layer formed on the lower surface of the floor finishing material 203 on the upper side of the floor heating panel 100. As the material of the resin layer 202, for example, urethane-based foamed resin or the like is adopted. The resin layer 202 is a layer interposed between the floor heating panel 100 and the floor finishing material 203. As the floor finishing material 203, the material according to the above-mentioned example is used.

Next, the configuration of the pipe member 6 and the method of manufacturing the pipe member 6 will be described with reference to FIGS. 4 to 7. FIG. 4 is a cross-sectional view showing each dimension of the pipe member 6. 5 to 7 are conceptual diagrams showing a method of setting dimensions based on reference dimensions set for the type of pipe member 6.

As shown in FIG. 4, the pipe member 6 has an annular cross section with reference to the center line CP. The pipe member 6 has an outer peripheral surface 6a and an inner peripheral surface 6b. The internal space surrounded by the inner peripheral surface 6b of the pipe member 6 functions as a flow path through which the heat medium passes. The outer peripheral surface 6a functions as a heat radiating surface that dissipates heat to the outside of the pipe member 6. Therefore, the heat transferred from the heat medium to the inner peripheral surface 6b passes through the pipe wall of the pipe member 6 and is dissipated on the outer peripheral surface 6a. An outer diameter D1, an inner diameter D2, a wall thickness center diameter D3, and a wall thickness T are set for such a pipe member 6. The outer diameter D1 is the diameter of the outer peripheral surface 6a. The inner diameter D2 is the diameter of the inner peripheral surface 6b. The wall thickness T is the thickness of the pipe wall. The wall thickness center diameter D3 is the diameter of the circle of the wall thickness center NC drawn by the center position of the thickness at each location in the circumferential direction of the pipe wall.

In the present embodiment, the wall thickness T is set so as to be thinner than the reference dimensions set for each type and to sufficiently secure the strength. That is, the outer diameter D1 and the inner diameter D2 are set so that the wall thickness T satisfying the above conditions can be obtained.

A method for manufacturing such a pipe member 6 will be specifically described. In the manufacturing method, a selection step of selecting the type of the pipe member 6, a setting step of setting the outer diameter and the inner diameter of the pipe member 6, and a pipe member 6 having the outer diameter and the inner diameter obtained in the setting step are formed. It includes a forming process.

In the selection step, the type is selected based on the size of the pipe member 6 used. For example, when a base member 1 having a thickness of 12 mm is used, "5A" and "6A" are selected as the types.

In the setting step, the outer diameter D1 and the inner diameter D2 are set so that the wall thickness T is thinner than the reference dimension set in the pipe member 6 of the type selected in the selection step. For example, the outer diameter SD1 according to the reference dimension of "5A" is 7.2 mm, and the inner diameter SD2 according to the reference dimension is 5.0 mm. The outer diameter SD1 according to the reference dimension of "6A" is 8.5 mm, and the inner diameter SD2 according to the reference dimension is 6.0 mm.

In the setting step, the dimensions may be set by any of the methods shown in FIGS. 5 to 7. These methods are methods of setting the outer diameter D1 and the inner diameter D2 so as to be within the range of the outer diameter SD1 and the inner diameter SD2 related to the reference dimensions. That is, it is a method in which the outer diameter D1 is set to the outer diameter SD1 or less related to the reference dimension, and the inner diameter D2 is set to the inner diameter SD2 or more related to the reference dimension.

In the method shown in FIG. 5, the outer diameter D1 is fixed by the outer diameter SD1 related to the reference dimension, and the inner diameter D2 is made larger than the inner diameter SD2 related to the reference dimension, so that the wall thickness T is larger than the wall thickness ST related to the reference dimension. Also thin. When such a method is adopted, the size of the groove portion of the base member 1 can be set to a size conforming to the existing reference dimension by maintaining the outer diameter D1 at the reference dimension. In this case, the existing pipe member 6 in the existing base member 1 and the thin-walled pipe member 6 according to the present embodiment can be easily replaced. Further, as the inner diameter D2 is increased to make the wall thinner, the flow path area of the heat medium can be increased. Therefore, the heat transfer efficiency of the heat medium to the tube member 6 can be improved by allowing the heat medium to flow smoothly. When the reference dimension of "5A" is adopted, the outer peripheral surface is sufficiently separated from the lower surface of the base member 1, so that the outer diameter dimension is a dimension capable of suppressing heat from escaping from the lower surface of the base member 1. It has become. Therefore, it is preferable to increase the cross-sectional area of the flow path by adopting the method shown in FIG.

In the method shown in FIG. 6, the inner diameter D2 is fixed by the inner diameter SD2 related to the reference dimension, and the outer diameter D1 is made smaller than the outer diameter SD1 related to the reference dimension, so that the wall thickness T is obtained from the wall thickness ST related to the reference dimension. Also thin. When such a method is adopted, even if the pipe member 6 according to FIG. 5 and the wall thickness T are the same, the strength can be made higher than that of the pipe member 6 according to FIG. For example, when the reference dimension of "6A" is adopted, the outer peripheral surface is arranged at a position close to the lower surface of the base member 1. Therefore, by adopting the method of FIG. 6 and separating the outer peripheral surface from the lower surface of the base member 1, it is possible to suppress heat from escaping from the lower surface side. After separating the outer peripheral surface from the lower surface of the base member 1 to a predetermined distance, the method shown in FIG. 5 may be adopted to increase the cross-sectional area of the flow path.

In the method shown in FIG. 7, the outer diameter D1 is made smaller than the outer diameter SD1 related to the reference dimension, and the inner diameter D2 is made larger than the inner diameter SD2 related to the reference dimension, so that the wall thickness T is made the wall thickness ST related to the reference dimension. Make it thinner than. When such a method is adopted, the merits of both the methods according to FIGS. 5 and 6 can be obtained.

In the forming step, the pipe member 6 having the outer diameter D1 and the inner diameter D2 set in the setting step is formed. As a method for forming the tube member 6, for example, a method of molding a mixture of resins is adopted.

8 to 10 are tables that specifically show the dimensions and various parameters that can be adopted in the above-mentioned setting process. FIG. 8 shows the dimensions and various parameters that can be adopted when the setting method shown in FIG. 5 is adopted in the pipe member 6 of “5A” and “6A”. FIG. 9 shows the dimensions and various parameters that can be adopted when the setting method shown in FIGS. 6 and 7 is adopted in the pipe member 6 of “5A”. Specifically, the samples 22 to 33 correspond to the setting method shown in FIG. 6, and the samples 34 to 44 correspond to the setting method shown in FIG. 7. FIG. 10 shows the dimensions and various parameters that can be adopted when the setting method shown in FIGS. 6 and 7 is adopted in the pipe member 6 of “6A”. Specifically, the samples 45 to 51 correspond to the setting method shown in FIG. 6, and the samples 52 to 58 correspond to the setting method shown in FIG. 7.

Here, the outer diameter of the pipe member 6 is preferably set to 8.5 mm or less in relation to the thickness of the base member 1. The base member 1 is preferably 11 mm or more so as not to release heat to the lower surface side, and is preferably 13 mm or less so that it can be folded. By setting the outer diameter of the pipe member 6 to 8.5 mm or less, the heat dissipation ratio to the heat dissipation surface can be improved by separating the outer peripheral surface of the pipe member 6 from the lower surface of the base member 1 which is a path for heat to escape. Then, the present inventors have found that the heat dissipation ratio can be remarkably improved by setting the outer diameter of the pipe member 6 to 8.5 mm or less. In the samples shown in FIGS. 8 to 10, those satisfying the conditions of the outer diameter are adopted.

Further, the circumferential stress of the pipe member 6 is preferably 1.2 MPa or less. That is, the dimensions of the pipe member 6 are set so that the circumferential stress is within the range. By setting the circumferential stress to 1.2 MPa or less, the strength can sufficiently ensure the safety of the pipe member 6 used for the floor heating panel. In the samples shown in FIGS. 8 to 10, those satisfying the conditions of the circumferential stress are adopted.

Further, the flow path cross-sectional area of the pipe member 6 is preferably 22.5 mm ² or more. If the flow path cross-sectional area of the pipe member 6 is widened, the heat medium can easily flow, so that the heat dissipation ratio to the heat dissipation surface can be improved. Then, the present inventors have found that the heat dissipation ratio can be remarkably improved by setting the flow path cross-sectional area of the pipe member 6 to 22.5 mm ² or more. In the samples shown in FIGS. 8 to 10, those satisfying the conditions of the cross-sectional area of the flow path are adopted.

Here, in FIGS. 8 to 10, the values indicating the strength of the pipe member 6 will be described. The durability of the resin pipe is generally expressed by the hot internal pressure creep characteristic. The hot internal pressure creep characteristic is a characteristic that expresses the relationship between the circumferential stress (hoop stress) generated by the internal pressure and the time until the pipe member 6 bursts when a constant pressure is applied under a certain temperature condition. That is, it shows the durability when continuously used at a constant pressure for a certain period of time.

Based on JXPA401, the circumferential stress when the required performance of the resin pipe was set to the maximum working pressure of 0.25 MPa at 80 ° C. was determined. The calculation formula was obtained by the following formula (1) defined in ISO1167 / JXPA401, and the circumferential stress when the circumferential stress at a pressure of 0.25 MPa was multiplied by the safety factor 1.5 (ISO4065 / JISK6769) was calculated. The calculation results are shown in FIGS. 8 to 10.

P = σ ・ 2emin / (D-emin)… (1)

P: Pressure
σ: Circumferential stress
D: Average outer diameter of the pipe
emin: Minimum wall thickness of pipe

Here, an example of the dimensional conditions to be adopted will be described. As the conditions that can be adopted, the conditions that "Condition 1: Safety factor 1.5, circumferential stress is 2.0 MPa or less" and "Condition 2: Standard size, out of tolerance" are adopted. May be good. The general tolerance is "± 0.12" for "5A" and "± 0.15" for "6A". Therefore, from FIG. 8, in the case of "5A", the thickness T may be 0.7 mm or more and 0.9 mm or less (samples 4 to 8), and in the case of "6A", the wall thickness T may be adopted. A dimension of 0.8 mm or more and 1.0 mm or less may be adopted (samples 14 to 18).

Regardless of the type, the ratio of the wall thickness to the outer diameter of the pipe member 6 (indicated as "wall thickness ratio (outer diameter)" in the table) is preferably 25% or less. The ratio of the wall thickness to the inner diameter of the pipe member 6 (indicated as "wall thickness ratio (inner diameter)" in the table) is preferably 34% or less. The ratio of the wall thickness to the wall thickness center diameter of the pipe member 6 (indicated as "wall thickness ratio (wall thickness center diameter)" in the table) is preferably 29% or less. That is, if the wall thickness is made thinner than the overall size of the pipe member 6, the heat of the heat medium flowing through the internal space can be satisfactorily transferred to the outer peripheral surface. Then, the inventors of the present application have found that the heat dissipation performance due to the thinning can be remarkably improved by setting the wall thickness ratio to be equal to or less than the upper limit of the above-mentioned numerical range.

The ratio of the wall thickness to the outer diameter of the pipe member 6 (indicated as "wall thickness ratio (outer diameter)" in the table) is preferably 19% or more. The ratio of the wall thickness to the inner diameter of the pipe member 6 (indicated as "wall thickness ratio (inner diameter)" in the table) is preferably 24% or more. The ratio of the wall thickness to the wall thickness center diameter of the pipe member 6 (indicated as "wall thickness ratio (wall thickness center diameter)" in the table) is preferably 21% or more. By setting the value to be equal to or higher than the lower limit of these numerical ranges, sufficient strength of the pipe member 6 can be ensured.

In addition, based on the above-mentioned wall thickness ratio, it is possible to set a preferable dimension for the pipe member 6 having a dimension outside the range of the reference dimension. That is, in the above description, the outer diameter D1 and the inner diameter D2 are set so that the wall thickness T becomes thinner within the range of the reference dimension, but the dimensions satisfy the above-mentioned wall thickness ratio. May be adopted. For example, as shown in FIG. 11, the wall thickness may be adjusted based on a dimensional relationship that is between "5A" and "6A". In FIG. 11, it is the samples 65 to 69 that the ratio of the wall thickness to the outer diameter of the pipe member 6 is 19% or more and 25% or less.

Next, a method of manufacturing the floor heating panel 100, the floor structure 200, and the pipe member 6 according to the present embodiment will be described.

In the floor heating panel 100, the pipe member 6 is provided on the base member 1 and is a member for circulating a heat medium. The thickness of the base member 1 is 11 mm or more and 13 mm or less so that heat is not released to the lower surface side and can be folded. The outer diameter of the tube member is 8.5 mm or less with respect to the thickness of the base member 1. As a result, the heat dissipation ratio to the heat dissipation surface can be improved by separating the outer peripheral surface of the pipe member 6 from the lower surface of the base member 1 which is a path for heat to escape. The flow path cross-sectional area of the pipe member 6 is 22.5 mm ² or more. As a result, the heat medium can easily flow, so that the heat dissipation ratio to the heat dissipation surface can be improved. The circumferential stress is 1.2 MPa or less. As a result, the strength of the pipe member 6 used for the floor heating panel 100 can be sufficiently ensured. The ratio of the wall thickness to the outer diameter of the pipe member 6 is 19% or more and 25% or less. By setting the wall thickness ratio to 25% or less, the wall thickness of the pipe member can be reduced. By making the tube member 6 thin in this way, the heat of the heat medium can be easily transferred to the outside of the tube member 6. Therefore, the heat dissipation performance of the floor heating panel 100 can be improved. Further, by setting the wall thickness ratio to 19% or more, sufficient strength can be secured. From the above, it is possible to further improve the performance of the floor heating panel 100.

When such a thin-walled pipe member 6 is used, it is particularly effective in heating in a low temperature region. That is, in a high temperature range, sufficient heat dissipation performance can be obtained even with a thick pipe member. On the other hand, in a low temperature region, it may be difficult to obtain sufficient heat dissipation performance due to the influence of the heat transfer coefficient of the pipe member. On the other hand, by adopting the thin-walled pipe member 6 of the present embodiment, sufficient heat dissipation performance can be obtained even when used in a low temperature range. However, when the pipe member 6 of the present embodiment is used, it can correspond to the entire temperature range.

The floor structure 200 according to the present embodiment includes the floor heating panel 100 described above, a slab 201 on which the floor heating panel 100 is placed, and a resin layer 202 formed on the upper surface of the floor heating panel 100.

The floor structure 200 has a slab 201 on the lower side of the floor heating panel 100, and has a resin layer 202 formed on the lower surface of the floor finishing material 203 on the upper side of the floor heating panel 100. When the slab 201 is formed on the lower side, the heat of the pipe member 6 easily escapes to the lower surface side. Further, since the resin layer 202 functions as a heat insulating material, heat dissipation to the upper surface side of the floor finishing material 203 is likely to be hindered. By using the floor heating panel 100 of the present embodiment for such a structure, heat can be effectively dissipated to the upper surface side of the floor finishing material 203.

The method for manufacturing the pipe member 6 according to the present embodiment is a method for manufacturing the pipe member 6 of the floor heating panel 100 which is provided on a plurality of base members 1 which spread in a flat plate shape and circulates a heat medium. A selection process for selecting, a setting process for setting the outer diameter and the inner diameter so that the wall thickness is thinner than the reference dimensions set for the pipe member 6 of the type selected in the selection process, and a setting process for setting. It includes a forming step of forming the pipe member 6 having the outer diameter and the inner diameter.

The manufacturing method of the pipe member 6 includes a setting step of setting the outer diameter and the inner diameter so that the wall thickness becomes thinner than the reference dimension set in the pipe member 6 of the type selected in the selection step. .. By setting based on the reference dimensions, the pipe member 6 can be easily and surely made thin.

In the setting process, the outer diameter of the reference dimension may be maintained and the inner diameter may be larger than the reference dimension. By maintaining the outer diameter of the reference position in this way, the size of the groove portion of the base member 1 can be set to a size conforming to the existing reference dimensions. In this case, the existing pipe member 6 in the existing base member 1 and the thin-walled pipe member 6 according to the present embodiment can be easily replaced. Further, as the inner diameter is increased to make the wall thinner, the flow path area of the heat medium can be increased. Therefore, the heat transfer efficiency of the heat medium to the tube member 6 can be improved by allowing the heat medium to flow smoothly.

[Example]
Next, examples of the present invention will be described with reference to FIGS. 12 to 17. As shown in FIG. 13, as the first embodiment, a pipe member having an outer diameter of 7.2 mm and an inner diameter of 5.4 mm was prepared, and a floor heating panel was installed so that there were four pipe members between the joists. Prepared. The mat dimensions were 909 mm x 1737 mm x 12 mm. Room temperature was 20 ° C. The hot water flowing temperature of the pipe member was set to 45 ° C. The floor heating panel was arranged as shown in FIG. The finishing material on the floor heating panel was 13.9 mm soundproof flooring. The base of the floor heating panel was a 180 mm slab (concrete block t60 x 3 steps). As shown in FIG. 12, sensors 61 for measuring the temperature of the floor surface, sensors 62 for measuring the temperature of the back surface of the mat, and sensors 63A, 63B, and 63C for measuring the temperatures of the lower, middle, and upper slabs were installed. The second embodiment is the same as the first embodiment except that the number of pipe members between the joists is six. Comparative Example 1 is the same as that of Example 1 except that the pipe member having the reference size of “6A” is used and the number of pipe members between the joists is six. Comparative Example 2 is the same as that of Example 1 except that a pipe member having a reference size of “5A” is used.

The measurement result of Example 1 is shown in FIG. 14, the measurement result of Example 2 is shown in FIG. 15, the measurement result of Comparative Example 1 is shown in FIG. 16, and the measurement result of Comparative Example 2 is shown in FIG. In addition, a table summarizing the results obtained by these graphs is shown in FIG. The top surface heat dissipation rates of Examples 1 and 2 are better than those of Comparative Examples 1 and 2 under any of the conditions.

1 ... base member, 6 ... pipe member, 100 ... floor heating panel, 200 ... floor structure, 201 ... slab, 202 ... resin layer, 203 ... floor finishing material.

Claims (4)

The base member that spreads like a flat plate and
A floor heating panel provided on the base member and comprising a plurality of pipe members for circulating a heat medium.
The thickness of the base member is 11 mm or more and 13 mm or less.
The outer diameter of the pipe member is 8.5 mm or less, and the outer diameter is 8.5 mm or less.
The flow path cross-sectional area of the pipe member is 22.5 mm ² or more.
Circumferential stress is 1.2 MPa or less
A floor heating panel in which the ratio of the wall thickness to the outer diameter of the pipe member is 25% or less. The floor heating panel according to claim 1 and
The slab on which the floor heating panel is placed and
A floor structure including a resin layer formed on the lower surface of the floor finishing material on the upper side of the floor heating panel. It is a method of manufacturing a pipe member of a floor heating panel which is provided on a plurality of base members spreading in a flat plate shape and circulates a heat medium.
A selection process for selecting the type of pipe member and
A setting step of setting the outer diameter and the inner diameter so that the wall thickness is thinner than the reference dimensions set in the pipe member of the type selected in the selection step.
A method for manufacturing a pipe member of a floor heating panel, comprising a forming step of forming the pipe member having an outer diameter and an inner diameter set in the setting step. The method for manufacturing a pipe member of a floor heating panel according to claim 3, wherein in the setting step, the outer diameter of the reference dimension is maintained and the inner diameter is made larger than the reference dimension.

Images