JP2011185452A - Radiation panel material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiation panel material effectively used to miniaturize a device by combining improvement of output as a radiating function and slimming. <P>SOLUTION: In this radiation panel material 7 including a long panel 10 and heat medium circulation pipes 11, 12 which are disposed along the longitudinal direction of the panel 10 and in which a heat medium flows, the plurality of heat medium circulation pipes 11, 12 are received in the panel 10, and the plurality of heat medium circulation pipes 11, 12 are arranged on the same plane P<SB>L</SB>. As the plurality of heat medium circulation pipes 11, 12 are received in the panel 10 in this radiation panel material 7, a circulation mount of the heat medium can be substantially increased, which is effective for improving the output. Further as the plurality of heat medium circulation pipes 11, 12 are arranged on the same plane P<SB>L</SB>in the panel 10, which is effective for slimming in comparison with, for example, a configuration where they are arranged zigzag. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a radiation panel material used for radiation cooling and radiation heating.

  2. Description of the Related Art Conventionally, there is known a radiation panel device formed by including a plurality of panels through which a liquid heat medium such as water can flow. In this type of radiant panel device, each panel is provided with radiation by circulating a heat medium between a plurality of panels and a separately installed heat source. It is possible to perform air conditioning. For example, in Patent Document 1, a plurality of radiant panel materials in which a heat medium flow tube through which a heat medium flows is housed in a panel are provided, and the heat medium is circulated through the heat medium flow tube of the radiant panel material. A radiation panel device that radiates radiant heat is disclosed.

JP 2006-153431 A

  By the way, when installing furniture or home appliances in a living room, because of the relationship of installing side by side with other furniture and home appliances, there are many cases where constraints such as width are larger than the depth, and the narrowest possible width is sufficient. An apparatus configuration that exhibits performance is preferable. However, since the radiation panel device described in Patent Document 1 is configured to exhibit a desired radiation function by arranging a plurality of radiation panel materials, it is necessary to increase the number of radiation panel materials in order to improve performance. If the above restrictions are large, it is not possible to arrange a sufficient number of sheets, and it becomes difficult to exert a desired radiation function.

  In particular, when using a radiation panel material with a waist height like a handrail, each panel has a height and height, that is, each panel has a height from the floor to the ceiling. Radiation panel material's heat absorption / heat dissipation area is slightly too small, and in some cases, it may be possible to supplement the cooling / heating capacity of a single unit by installing multiple radiation panel devices themselves, which may require additional consideration for installation space and construction. There is.

  To solve this problem, it is conceivable to increase the circulation amount of the heat medium by increasing the diameter of the pipe through which the heat medium is circulated, thereby improving the output per radiant panel material. When the size is increased, the thickness of the radiation panel material increases, and there is a problem that the apparatus itself configured by arranging a plurality of radiation panel materials is enlarged.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a radiant panel material that is effective for downsizing of the apparatus while improving both output and slimming.

  The present invention relates to a radiant panel member including a panel formed in a long shape and a pipe arranged along the longitudinal direction of the panel and through which a heat medium flows, and a plurality of pipes are accommodated in the panel. The plurality of pipes are arranged side by side on the same plane.

  According to the present invention, since the plurality of pipes are accommodated in the panel, it is possible to substantially increase the circulation amount of the heat medium, which is effective in improving the output. Further, since the plurality of pipes are arranged side by side on the same plane in the panel, for example, it is effective for slimming the panel as compared with a mode in which they are arranged in a staggered pattern. As a result, according to the present invention, it is effective to reduce the size of the apparatus while improving both output and slimming.

  Further, the pipe extends from one end portion in the longitudinal direction of the panel toward the other end portion, and extends from the other end portion of the panel toward the one end portion. A plurality of pipes have different separation widths between the forward path part and the return path part, and a pipe with a smaller separation width has a larger separation width. It is preferable that they are arranged side by side on the same plane so as to be inside.

  For example, if the diameter is increased in order to improve the output in a U-shaped pipe, it is difficult to manufacture a curved portion unless the radius of curvature of the curved portion is increased, resulting in a large size. There is a risk of losing slimness. However, according to the above configuration, the output can be improved by arranging a plurality of pipes instead of increasing the diameter of the pipes, which is effective for slimming. Furthermore, according to the above configuration, each pipe is arranged in a state where a part of the output region radially extending in the radially outward direction of each pipe is overlapped, and the output from any pipe is between the adjacent pipes. The formation of an unaffected blank area is avoided as much as possible, so that each pipe does not form a single linear output area, but has a synergistic effect between adjacent pipes. Thus, the output region is formed in a shape, and the output of the entire panel can be improved.

  Furthermore, it is preferable that the interval between the pipes arranged adjacent to each other is smaller than at least half of the separation width of the pipe arranged at the innermost side. According to this configuration, the advantage that the output region is formed in a planar shape with a synergistic effect between adjacent pipes becomes more remarkable, which is effective in improving the output of the entire panel.

  Further, the forward path portion of the pipe forms a fluid forward path in which the heat medium flows from one end portion of the panel to the other end portion, and the return path portion forms a heat medium from the other end portion of the panel to one end portion. It is preferable that the pipes adjacent to each other, which form a fluid return path that flows, are arranged so that the forward path parts are adjacent to each other and the return path parts are adjacent to each other. According to this configuration, for example, the forward path portions where the heat medium that has obtained sufficient heat from the heat source flows are adjacent to each other, so that the output of the portion where the forward path portions are concentrated in the panel is significantly improved. Can be made.

  The forward path portion of the pipe forms a fluid forward path in which the heat medium flows from one end portion of the panel to the other end portion, and the return path portion forms the heat medium from the other end portion of the panel to one end portion. A fluid return path is formed, and adjacent pipes are in a state in which the forward path part of one pipe and the return path part of the other pipe are adjacent to each other, and the return path part of one pipe and the forward path part of the other pipe are adjacent to each other. It is preferable to be disposed. According to this configuration, in the plurality of pipes arranged adjacent to each other, the forward path part and the return path part are alternately arranged with each other, so even if the output is reduced in the return path part, The forward path portion adjacent to the return path portion compensates for the decrease, and a constant output can be maintained over the entire panel.

  According to the present invention, it is an object to provide a radiation panel material that is effective in reducing the size of the apparatus while improving both output and slimming.

It is a front view which shows the state which attached the radiation panel apparatus which concerns on 1st Embodiment of this invention. FIG. 2 is an end view taken along line II-II in FIG. 1. It is sectional drawing along the III-III line of FIG. FIG. 4 is an end view taken along line IV-IV in FIG. 3. The forward path part and the return path part of a heat carrier circulation pipe are typically shown, (a) is a figure showing the mode in which forward path parts and return path parts adjoin each other, and (b) is the forward path part and the return path part adjacent to each other. It is a figure which shows an aspect. It is sectional drawing which shows the aspect which arranged the several radiation panel material which concerns on this embodiment so that the width direction might be orthogonal to an arrangement direction.

Preferred embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)

  As shown in FIGS. 1 to 4, the radiation panel device 1 is a radiation device that performs radiation heating or radiation cooling. Further, the radiant panel device 1 is installed along a relatively short wall R such as under a window frame or a handrail. The radiant panel device 1 includes a pair of support columns 3 erected in the vertical direction, a bridge 5 installed on the upper end (one end) side of the pair of support columns 3, and a plurality of long lengths whose upper ends are supported by the bridge 5. The radiation panel material 7, the cover 8 that covers the upper side of the bridge 5, and the condensation water that is provided below the radiation panel material 7 and on the floor board F and dripping from the surfaces of the plurality of radiation panel materials 7 positioned above is received. And a dew condensation water receiving structure 9 for discharging. The bridge 5 and the cover portion 8 are fixed to the wall R via brackets 5a and 8a (see FIG. 3).

  The radiant panel material 7 includes a long hollow member (panel) 10 having a flat cross section, and the panel 10 is formed of a metal such as aluminum or stainless steel by, for example, extrusion molding, It is formed by cutting the cylindrical body with a predetermined length. The radiant panel material 7 is disposed such that the longitudinal direction D1 faces the vertical direction, and the upper end of the panel 10 is screwed to the bridge 5 via a panel cap.

  As shown in FIG. 2 and FIG. 4, the panel 10 has a substantially convex lens shape in which the outer shape of a cross section (transverse cross section) cut along a direction orthogonal to the longitudinal direction D1 has a plurality of protrusions 10c. The substantially arcuate surface on one side forming the lens shape is one panel surface 10a, and the substantially arcuate surface on the opposite side is the other panel surface 10b. As a result, the pair of panel surfaces 10a and 10b form a relationship in which they are arranged to face each other so that the direction in which they bulge in a convex shape (the normal direction at the top of each of the panel surfaces 10a and 10b) faces opposite directions. Yes.

  The plurality of protrusions 10c formed on the panel surfaces 10a and 10b extend linearly along the longitudinal direction (longitudinal direction of the radiation panel material 7) D1 of the panel surfaces 10a and 10b. The plurality of protrusions 10c function as heat radiating and heat absorbing fins that increase the heat transfer area to the outside air, and when the radiant panel device 1 is used as cooling, the condensed water that adheres to the surfaces of the panel surfaces 10a and 10b is transmitted downward. It also functions as a water guide.

  As shown in FIG. 3, two U-shaped heat medium flow pipes (pipe) 11 and 12 for circulating a heat medium made of fluid, for example, antifreeze or water, are inserted into the panel 10. Yes. The heat medium flow pipes 11 and 12 are made of resin pipes having an inner diameter of 8 mm or less. By using the resin-made heat medium flow pipes 11 and 12 in this way, the flexibility is good and the heat medium flow pipes 11 and 12 can be bent to a small radius, and the heat medium flow pipes 11 and 12 are processed and assembled to the radiation panel material 7. Can be easily performed. In this embodiment, a cross-linked polyethylene pipe is used as the resin pipe, but other polyolefin resin materials such as a polybuden pipe may be used.

  The heat medium flow pipe 11 includes a forward path portion 11a that forms a fluid forward path of the heat medium along the extending direction (vertically below) from the upper end portion of the radiation panel material 7, and a lower end of the radiation panel material 7 that is connected to the forward path portion 11a. A return path portion 11b that forms a fluid return path of the heat medium along a direction (vertically upward) opposite to the extending direction from the section. Similarly, the heat medium flow pipe 12 also has a forward path portion 12a that forms a fluid forward path of the heat medium along the extending direction (vertically below) from the upper end of the radiation panel material 7, and a radiation panel material that is connected to the forward path portion 12a. 7 has a return path portion 12b that forms a fluid return path of the heat medium along a direction (vertically upward) opposite to the extending direction from the lower end portion.

The curvature radii r1 and r2 of the curved end portions of the two heat medium flow pipes 11 and 12 are different, and the curvature radius of the heat medium flow pipe 11 on the side with the smaller curvature radius r1 is about 55 mm. Further, the separation width L1 between the forward path portion 11a and the return path portion 11b of the heat medium flow pipe 11 is smaller than the separation width L2 between the forward path portion 12a and the return path portion 12b of the heat medium flow pipe 12. . The heat medium flow pipe 11 is arranged inside (in the center of) the width direction D2 in the panel 10, and the heat medium flow pipe 12 is arranged outside. Furthermore, the distance L3 between the heat medium flow tubes 11 and 12 is smaller than half of the separation width L1 of the heat medium flow tube 11 arranged at the innermost position. As a result, the heat medium flow pipe 11 and 12, the same plane on P _L along the width direction D2 of the panel 10 forms a state aligned (see FIG. 4), these heat medium circulating in the same plane The pipes 12 are configured not to cross each other. In addition, the width direction D2 of the panel 10 intends the direction orthogonal to the longitudinal direction D1 and orthogonal to the plate thickness direction D3.

  As shown in FIG. 4, a first guide wall portion 10 d having a substantially semicircular cross section for guiding the forward path portion 11 a of the heat medium flow pipe 11 is provided inside the panel 10. Further, a first guide member 10e having a substantially semicircular cross section is fitted and inserted into the panel 10 so as to face the first guide wall 10d. The first guide wall portion 10d and the first guide member 10e extend along the longitudinal direction D1 of the panel 10 and are combined with each other to surround the forward path portion 11a in a tubular shape and hold it in a predetermined position.

  Further, a second guide wall portion 10f for guiding the return path portion 11b of the heat medium flow pipe 11 is provided inside the panel 10, and further, a second guide is provided so as to face the second guide wall portion 10f. A member 10g is inserted. The configurations of the second guide wall portion 10f and the second guide member 10g are the same as those of the first guide wall portion 10d and the first guide member 10e, and are combined with each other to surround the return path portion 11b in a tubular shape. Hold in position.

  Further, inside the panel 10, the third guide wall 10h, the third guide member 10i, the fourth guide wall 10j, and the fourth that guide the outer heat medium flow pipe 12 and hold it in a predetermined position. The guide member 10k is provided. The third guide wall portion 10h is provided side by side with the first guide wall portion 10d on the outer side of the first guide wall portion 10d, and the third guide member 10i is disposed on the third guide wall portion 10h. It is inserted so as to face each other. The third guide wall portion 10h and the third guide member 10i have a substantially semicircular cross section, and are combined with each other to hold the forward path portion 12a in a tubular shape and hold it in a predetermined position. Similarly, the fourth guide wall portion 10j is provided outside the second guide wall portion 10f and aligned with the second guide wall portion 10f, and the fourth guide member 10k is the fourth guide wall portion. It is inserted so as to face the portion 10j. The configurations of the fourth guide wall portion 10j and the fourth guide member 10k are the same as those of the third guide wall portion 10h and the third guide member 10i, and are combined with each other to surround the return path portion 12b in a tubular shape. Hold in position.

  As shown in FIGS. 1 and 3, above the bridge 5, a heat medium is supplied to the heat medium flow pipes 11 and 12 inserted in the radiation panel material 7 to heat the heat medium flow pipes 11 and 12. A first header portion 13 and a second header portion 14 are provided for flowing the medium and receiving the heat medium flowing out from the heat medium flow pipes 11 and 12. The first header portion 13 includes a distribution pipe 13 a that supplies the heat medium to the heat medium flow pipe 11 and a junction pipe 13 b that receives the heat medium discharged from the heat medium flow pipe 11. The second header portion 14 includes a distribution pipe 14 a that supplies the heat medium to the heat medium flow pipe 11 and a junction pipe 14 b that receives the heat medium discharged from the heat medium flow pipe 11. The 1st header part 13 and the 2nd header part 14 are covered with the cover part 8, and are hidden so that it cannot be visually recognized from the outside. A heat insulating material 18 is accommodated in the cover portion 8 so as to wrap the first header portion 13 and the second header portion 14.

  The connection between the distribution pipe 13a and the merge pipe 13b of the first header portion 13 and the plurality of heat medium flow pipes 11, or the distribution pipe 14a and the merge pipe 14b and the plurality of heat medium flow pipes 12 of the second header portion 14. However, in the present embodiment, a plurality of heat medium flow pipes 11 are connected in series with each other. (See FIG. 5), and the distribution pipe 13 a communicates with the forward path portion 11 a of the most upstream heat medium flow pipe 11, and the merge pipe 13 b connects with the return path portion 11 b of the most downstream heat medium flow pipe 11. I'm in touch. In addition, it is also possible to configure so that the distribution pipes 13 a communicate with the forward path portions 11 a of all the heat medium flow pipes 11 and the merge pipes 13 b communicate with the return path portions 11 b of all the heat medium flow pipes 11. . The communication mode between the second header portion 14 and the heat medium flow pipe 12 is the same.

  The distribution pipe 13a of the first header section 13 is connected to the heat source 17 via the main pipe 15 on the forward path side, and the junction pipe 13b is connected to the heat source 17 via the main pipe 15 on the return path side, thereby the heat source 17 and the heat medium. A circulation path with the circulation pipe 11 is formed. Similarly, the distribution pipe 14a of the second header section 14 is connected to the heat source 17 via the main pipe 16 on the forward path side, and the junction pipe 14a is connected to the heat source 17 via the main pipe 16 on the return path side. And a circulation path between the heat medium circulation pipe 12 are formed.

  As shown in FIG. 2, the plurality of radiation panel members 7 are arranged in a line, but the width direction D <b> 2 of each of the plurality of radiation panel members 7 is perpendicular to the arrangement direction D <b> 4 of the radiation panel members 7. It is inclined with respect to the direction D5. Further, the radiation panel members 7 arranged adjacent to each other have an overlapping region (wrap region) A with reference to a direction D5 perpendicular to the alignment direction D4 of the radiation panel materials 7.

Next, the flow of the heat medium in the heat medium flow pipes 11 and 12 will be described with reference to FIG. In the present embodiment, as shown in FIG. 5A, the forward path portion that forms the fluid forward path of the heat medium flow pipe 11 by flowing the heat medium in the forward direction toward the heat medium flow pipes 11 and 12, respectively. 11a and the forward path portion 12a forming the fluid forward path of the heat medium flow pipe 12 are arranged next to each other, and the return path section 11b forming the fluid return path of the heat medium flow pipe 11 and the fluid return path of the heat medium flow pipe 12 are formed. The return path portion 12a to be lined up next to each other is embodied. In this way, by forming a state in which the forward path portions 11a and 12a and the backward path portions 11b and 12b are adjacent to each other, for example, the forward path portion 11a and the forward path portion 11a in which sufficient heat is obtained by the heat source 17 flows. Since the 12a is adjacent to each other, the output of the part of the panel 10 where the forward paths 11a and 12a are concentratedly arranged can be remarkably improved.
As described above, the method of concentrating the forward path portions 11a and 12a of the heat medium flow pipe 12 on one side portion of the radiant panel material 7 is particularly suitable for the radiant panel device 1 installed along the wall. This is effective when set indoors.

On the other hand, as shown in FIG. 5B, the heat medium is caused to flow in the forward direction toward the heat medium flow pipe 11, and the heat medium is caused to flow in the reverse direction toward the heat medium flow pipe 12. The forward path part 11a that forms the fluid forward path of the flow pipe 11 and the return path part 12b that forms the fluid return path of the heat medium flow pipe 12 are arranged next to each other, and the return path part 11b that forms the fluid return path of the heat medium flow pipe 11 It is also possible to have a state in which the forward path portion 12a that forms the fluid forward path of the heat medium flow pipe 12 is arranged next to each other. In this way, in the plurality of heat medium flow pipes 11 and 12 disposed adjacent to each other, the forward path portions 11a and 12a and the backward path portions 11b and 12b are alternately arranged so as to return to each other. Even in the portion where the output decreases at the portions 11b and 12b, the forward path portions 11a and 12a adjacent to the return path portions 11b and 12b compensate for the decrease, and a constant output is maintained throughout the panel 10. be able to.
Thus, the method of alternating the forward path portions 11a and 12a and the return path portions 11b and 12b of the heat medium flow pipe 12 is effective when the radiation panel device 1 is used as a partition wall.

Next, the operation and effect of the radiation panel material 7 according to this embodiment will be described. When the heat medium circulates between the heat source 17 and the heat medium flow pipes 11 and 12 and the heat medium supplied to the radiant panel material 7 is lower than room temperature, it exhibits a radiative cooling function, and is higher than room temperature. It has a radiant heating function. Here, since two (a plurality of) heat medium flow pipes 11 and 12 are accommodated in the panel 10 of the radiation panel material 7, it is possible to substantially increase the circulation amount of the heat medium. This is effective for improving the output. Further, a plurality of heating medium flow pipe 11 and 12, because it is arranged in the same plane P _L in the panel 10, for example, is effective in slim compared to the embodiments are arranged in a staggered manner . As a result, according to the present embodiment, it is effective for reducing the size of the radiant panel device 1 including the plurality of radiant panel members 7 while achieving both improvement in output and slimming.

  Moreover, in the conventional apparatus (refer patent document 1) with which the one heat medium distribution pipe is arrange | positioned in the panel, it is possible to improve an output by increasing the circulation amount of a heat medium, but this In this case, the pump for circulating the heat medium tends to be excessively large, which is disadvantageous for downsizing the apparatus. On the other hand, in this embodiment, since a plurality of heat medium flow pipes 11 and 12 are accommodated in the panel 10, the number of heat medium flow pipes 11 and 12 and the capacity of the pump according to the desired output. This is easy to optimize and effective for downsizing the device.

Further, the heat medium flow pipes 11 and 12 are formed in a U-shape having forward path portions 11a and 12a and return path portions 11b and 12b, and the plurality of heat medium flow pipes 11 and 12 include the forward path portions 11a and 12b. Separation widths L1 and L2 between 12a and the return path portions 11b and 12b are different. As towards the lower heating medium flow pipe 11 having spaced width L1 is inside larger heating medium flow pipe 12 of the separation width L2, they are arranged side by side on the same plane P _L.

  For example, when the pipe inserted into the panel is U-shaped, if the pipe diameter is increased to improve the output, it is difficult to manufacture a curved part unless the radius of curvature of the curved part is increased. As a result, there is a risk that slimming of the radiant panel material may be impaired. However, according to the present embodiment, it is possible to improve the output by arranging the plurality of heat medium flow tubes 11 and 12 instead of increasing the diameter of the U-shaped heat medium flow tubes 11 and 12. This is effective for slimming.

  Furthermore, according to the present embodiment, the heat medium flow tubes 11 and 12 are arranged in a state where the output regions radially extending in the radial direction of the heat medium flow tubes 11 and 12 are overlapped, and adjacent heat medium flow tubes. It is possible to avoid as much as possible that a blank area that is not affected by the output from any of the heat medium flow pipes 11 and 12 is formed in the heat transfer medium flow pipes 11 and 12. The output region is not formed in the shape of the sheet, but is formed in a planar shape with a synergistic effect between the heat medium flow pipes 11 and 12, and the output of the entire panel 10 can be improved. Become.

  In particular, in this embodiment, the distance L3 between the heat medium flow pipes 11 and 12 disposed adjacent to each other is smaller than half of the separation width L1 of the heat medium flow pipe 11 disposed on the innermost side. The advantage that the output region is formed in a planar shape with a synergistic effect between the matching heat medium flow tubes 11 and 12 becomes more remarkable, which is effective in improving the output of the entire panel 10.

  Further, the plurality of radiation panel members 7 according to the present embodiment are arranged such that the width direction D2 is inclined with respect to the direction D5 perpendicular to the arrangement direction D4. Further, the radiation panel members 7 arranged adjacent to each other have an overlapping region (wrap region) A with reference to a direction D5 perpendicular to the alignment direction D4 of the radiation panel materials 7. Accordingly, it is possible to increase the number of the radiation panel members 7 while compressing the lateral width dimension (arrangement direction of the radiation panel members 7) D4 of the radiation panel device 1 and to easily improve the capability of the radiation function.

  In the present embodiment, the plurality of radiation panel members 7 are arranged such that the width direction D2 is inclined with respect to the direction D5 perpendicular to the arrangement direction D4. For example, as shown in FIG. A plurality of radiation panel members 7 may be arranged in parallel, and the width direction D2 of the radiation panel members 7 may be arranged so as to face a direction D5 perpendicular to the arrangement direction D4.

  As mentioned above, although this invention was concretely demonstrated based on the embodiment, this invention is not limited to the said embodiment. For example, in the above embodiment, a mode in which a U-shaped pipe (heat medium flow pipe) is inserted into the panel of the radiation panel material has been described, but a mode in which a plurality of straight pipes are accommodated in the panel. It may be. Further, the number of pipes (heat medium flow pipes) accommodated in the panel is not limited to two, and three or more pipes can be arranged side by side on the same plane.

DESCRIPTION OF SYMBOLS 1 ... Radiation panel apparatus, 7 ... Radiation panel material, 10 ... Panel, 11, 12 ... Heat-medium distribution pipe (pipe), 11a, 12a ... Outward part of heat-medium distribution pipe, 11b, 12b ... Return path of heat-medium distribution pipe parts, D1 ... longitudinal, L1, L2 ... spaced width between the forward portion and the backward portion, identical to L3 ... adjacently heating medium flow pipe interval between which is disposed, the P L _... heating medium flow pipe lined Plane.

Claims (5)

In a radiant panel material comprising a panel formed in a long shape, and a pipe arranged along the longitudinal direction of the panel and through which a heat medium flows,
A plurality of the pipes are accommodated in the panel,
The plurality of pipes are arranged side by side on the same plane. The pipe extends from one end portion in the longitudinal direction of the panel toward the other end portion, and extends from the other end portion of the panel toward the one end portion. It is formed in a U shape having a return path portion extending,
The plurality of pipes are the same so that the separation width between the forward path portion and the return path portion is different, and the pipe having the small separation width is located inside the pipe having the large separation width. The radiation panel material according to claim 1, wherein the radiation panel material is arranged side by side on a plane.   The radiation panel material according to claim 2, wherein an interval between the pipes arranged adjacent to each other is at least smaller than a half of a separation width of the pipes arranged on the innermost side. The forward path section forms a fluid forward path in which the heat medium flows from one end of the panel to the other end, and the return path section includes the heat medium from the other end of the panel to one end. Forming a fluid return path that flows to
4. The radiant panel material according to claim 2, wherein the adjacent pipes are arranged in a state in which the forward path portions are adjacent to each other and the return path portions are adjacent to each other. The forward path section forms a fluid forward path in which the heat medium flows from one end of the panel to the other end, and the return path section includes the heat medium from the other end of the panel to one end. Forming a fluid return path that flows to
In the adjacent pipes, the forward path part of one of the pipes and the return path part of the other pipe are adjacent to each other, and the return path part of one of the pipes and the forward path part of the other pipe are adjacent to each other. The radiation panel material according to claim 2, wherein the radiation panel material is disposed in the manner described above.

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