Floor heating hot water panel and floor heating system using the same

Abstract

To provide a floor heating hot water panel capable of improving heating efficiency, being thinned and lightened, and reducing thermal deformation, and a floor heating system using the same.SOLUTION: A heat insulating panel 20 has a piping groove 200 recessed in an upper surface 21 of the heat insulating panel 20, and a heat exchange pipe 3, and the piping groove 200 has a forward passage groove part 201, a return passage groove part 202, and a heat radiation groove part 203. The heat exchanger pipe 3 includes a supply pipe 310 disposed in the supply groove 201, a return pipe 320 disposed in the return groove 202, and a heat dissipation pipe 330 disposed in the heat dissipation groove 203 and connected between the supply pipe 310 and the return pipe 320, and inner diameters (D1) of the supply pipe 310 and the return pipe 320 are set such that a flow rate in the pipes is 0. 17m / s to 0. 26m / s when the warm water 50 is supplied at a rated flow rate. The inside diameter (D2) of the heat radiation pipe 330 is set so that the flow velocity in the pipe is 0. 10m / s to 1. 25m / s.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to floor heating technology and relates to a floor heating hot water panel in which an insulating panel with heat exchange pipes running through it is laid under the floor finishing material of a building, and a floor heating system that uses the same by supplying or circulating a heat medium to the heat exchange pipes to provide heating. [Background technology]

[0002] Conventional floor heating hot water panels, such as the floor heating panel and floor heating panel assembly shown in Patent Document 1 (Patent No. 6072828), are of the series type, in which the heat exchange pipes of multiple insulating panels are connected in series. The series type has the disadvantage that the heat exchange pipes running through the insulating panel are long, which cools the hot water and makes it difficult to improve the heating effect.

[0003] The applicant of this application has shown in Patent Document 2 (Patent No. 6860930) a parallel system in which the heat exchange pipes of a heat insulating panel are connected in parallel to the floor heating panel. The parallel system floor heating panel has multiple heat exchange pipes arranged in parallel, and each heat exchange pipe can be made shorter than the conventional series system, allowing the hot water to finish passing through before it cools down, thereby improving heating efficiency. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6072828 [Patent Document 2] Patent No. 6860930 Summary of the Invention [Problem to be solved by the invention]

[0005] The applicant of this application is currently developing a floor heating hot water panel that can be used more economically by further improving the heating efficiency of the panel. With existing floor heating hot water panels, the heating efficiency deteriorates when the flow rate of hot water through the heat exchange pipe is high, but when the flow rate is reduced, sufficient heating effect cannot be obtained.

[0006] In addition, the thickness of existing floor heating hot water panels requires the floor finishing materials to be installed higher, narrowing the indoor space. The thicker the insulation panels, the higher the costs of manufacturing, storage, and transportation, and the greater the workload required for installation. Furthermore, existing floor heating hot water panels have the risk of thermal expansion due to the heat generated by the insulation panels themselves, which can lead to deformation or damage.

[0007] In view of the above circumstances, the present invention provides a floor heating hot water panel that can improve heating efficiency without increasing the temperature and flow rate of hot water. It also provides a floor heating hot water panel that can be made thinner and lighter by reducing the thickness of the insulation panel. It also provides a floor heating hot water panel that can reduce deformation due to its own heat. It also provides a floor heating system that uses the floor heating hot water panel. [Means for solving the problem]

[0008] The present invention relates to an insulating panel having a predetermined thickness and made of a flat insulating material, a piping groove recessed in the upper surface of the insulating panel, and a heat exchange pipe arranged in the piping groove, wherein the piping groove has an outgoing groove portion and a return groove portion, and a heat dissipation groove portion whose upstream end is connected to the outgoing groove portion and whose downstream end is connected to the return groove portion, and the heat exchange pipe comprises an outgoing pipe arranged in the outgoing groove portion, a return pipe arranged in the return groove portion, and a heat exchange pipe arranged in the heat dissipation groove portion, whose upstream end is connected to the outgoing pipe and whose downstream end is connected to the return pipe. and a heat radiation pipe connected to a heat exchange pipe, wherein the inner diameters (D1) of the outgoing pipe and the return pipe are set so that when hot water is supplied to the heat exchange pipe at a rated supply flow rate, the flow velocity in the outgoing pipe and the return pipe is 0.17 m / s to 0.26 m / s, and the inner diameter (D2) of the heat radiation pipe is set so that when hot water is supplied to the heat exchange pipe at a rated supply flow rate, the flow velocity in the heat radiation pipe is 0.10 m / s to 1.25 m / s. Although the flow velocity in the pipes can be adjusted by the flow rate output from a hot water supply device such as a boiler that supplies hot water, the rated supply flow rate of the hot water supply device generally does not change significantly and is dependent on the water pressure of the mains water supply (0.15 MPa to 0.4 MPa). Therefore, in this invention, the flow velocity in the pipes is adjusted to an optimal range by adjusting the inner diameter of the heat exchange pipes (i.e., the outgoing pipe, the return pipe, and the heat dissipation pipe).

[0009] The floor heating hot water panel increases the flow rate in the pipes compared to conventional types, allowing for better heat dissipation and increased heating efficiency. The insulation panel is made of a flat insulating material that can be laid alone or in combination with multiple panels, reducing heat loss to the underfloor. A piping groove is recessed in the upper surface of the insulation panel, allowing heat exchange pipes to be installed flush with the upper surface. The insulation material of the insulation panel can be made of, for example, closed-cell urethane foam, polystyrene foam, rigid urethane foam, phenolic foam, carbonized cork, or other materials.

[0010] The piping groove enables the heat exchange pipe to be installed flush with the upper surface of the insulation panel. The piping groove can be shaped so as to fit closely to the bottom and side surfaces of the heat exchange pipe, excluding the upper surface, in the installed position. The piping groove can be configured on the upper surface of the insulation panel to include an outward groove and a return groove that are parallel to each other, and one or more heat dissipation grooves, each with its upstream end connected to the outward groove and its downstream end connected to the return groove. The outward groove can be arranged so as to be continuous with the outward groove of an adjacent insulation panel, and the return groove can be arranged so as to be continuous with the return groove of an adjacent insulation panel.

[0011] The heat exchange pipes, which are the outward pipe, return pipe, and heat dissipation pipe, guide hot water supplied from outside the floor heating hot water panel along the upper surface of the insulation panel and dissipate heat, thereby providing floor heating functionality. The heat exchange pipes are flexible enough to deform along the piping grooves and are made of a material that has excellent waterproofing, heat resistance, and durability, such as ethylene propylene diene rubber, silicone rubber, natural rubber, other synthetic rubbers, cross-linked polyethylene, other resins, aluminum, copper, other metals, etc.

[0012] The heat exchange pipe is formed by an outgoing pipe disposed in the outgoing groove, a return pipe disposed in the return groove, and a heat dissipation pipe disposed in the heat dissipation groove. The heat dissipation pipe has an upstream end connected to the outgoing pipe, a downstream end connected to the return pipe, and a heat dissipation area enlargement section between the upstream and downstream ends that forms a wave shape such as a sine wave or a detour shape such as a serpentine shape to enlarge the heat dissipation area. The outgoing pipe and the return pipe have inner diameters larger than those of the heat dissipation pipe to ensure the flow rate of multiple heat dissipation pipes. The outgoing pipe has connectors at at least both ends that connect to outgoing pipes disposed in the outgoing groove of adjacent insulation panels. The return pipe has connectors at at least both ends that connect to return pipes disposed in the return groove of adjacent insulation panels. The connectors can be replaced with sealing plugs. A hot water supply device for circulating and supplying hot water can be connected to the forward end of the forward pipe and the return end of the return pipe.

[0013] The flow velocity in the outgoing pipe and the return pipe is preferably set to 0.17 m / s to 0.26 m / s when the rated supply flow rate is 0.50 L / min. If the flow velocity in the pipe is less than 0.17 m / s, the flow velocity is too slow to generate a sufficient flow velocity in the heat dissipation pipe. On the other hand, if the flow velocity in the pipe exceeds 0.26 m / s, it is necessary to select the outgoing pipe, the return pipe, and the heat dissipation pipe with higher durability, as an increase in wall thickness may result in a decrease in heat dissipation performance. The inner diameter (D1) of the outgoing pipe and the return pipe can be set to the average inner diameter (D1) of the outgoing pipe and the return pipe. In particular, by increasing the flow rate in the outward pipe, the flow rate of the liquid flowing into the heat radiation pipe also increases, and by increasing the flow rate in the return pipe, the flow rate of the liquid flowing out of the heat radiation pipe also increases. As a result, the flow rate of the liquid at least near the inlet and outlet of the heat radiation pipe increases, and the overall flow rate of the liquid per underfloor heating hot water panel increases.

[0014] The inner diameter (D1) of the outward pipe and the return pipe can be set to one or more inner diameter dimensions within a range of 0.17 m / s to 0.26 m / s, preferably 0.17 m / s to 0.21 m / s, in which the flow velocity in the pipes is 0.17 m / s to 0.26 m / s when hot water is supplied to the heat exchange pipe at a rated supply flow rate. For example, the inner diameter (D1) of the outward pipe and the return pipe can be set to an average inner diameter (D1) of Φ6 to Φ7.9 mm over the entire length, in which the flow velocity in the outward pipe and the return pipes is 0.17 m / s to 0.26 m / s when hot water is supplied to the heat exchange pipe at a rated supply flow rate. If the inner diameter (D1) is less than Φ6 mm, the heat radiation pipe may not be able to achieve a sufficient flow velocity in the pipe, while if it exceeds Φ7.9 mm, the flow velocity in the pipe may exceed the value suitable for the heat radiation pipe. Furthermore, for example, the forward or return pipe may be formed by connecting pipes of different inner diameters (D1) of Φ7 mm and Φ8 mm, with the same or different pipe lengths, within a range in which the flow velocity in the pipe is 0.17 m / s to 0.26 m / s at the rated supply flow rate.

[0015] The flow velocity within the heat dissipation pipe is preferably set to 0.10 m / s to 1.25 m / s when the rated supply flow rate is 0.50 L / min. If the flow velocity within the pipe is less than 0.10 m / s, the flow velocity is too slow and the water cools to a temperature where heat cannot be dissipated while passing through the heat dissipation pipe, resulting in a lower heat dissipation effect than conventional methods. Furthermore, if the flow velocity within the pipe exceeds 1.25 m / s, a more durable heat dissipation pipe must be selected, as an increase in wall thickness may result in a decrease in heat dissipation performance. Furthermore, the water may pass through the heat dissipation pipe before sufficient heat dissipation has been achieved, resulting in a decrease in heating efficiency and fuel efficiency, which may result in a loss of economic viability. The inner diameter (D2) of the heat dissipation pipe may be set to one or more values ​​within the range of 0.10 m / s to 1.25 m / s, so that the flow velocity within the pipe when hot water is supplied to the heat exchange pipe at the rated supply flow rate is 0.10 m / s to 1.25 m / s. For example, the heat dissipation pipes may be connected to each other with different inner diameters of Φ5.5 mm, Φ3 mm, and Φ1.7 mm, and may have the same or different pipe lengths, as long as the flow velocity within the pipe when hot water is supplied to the heat exchange pipe at the rated supply flow rate is in the range of 0.10 m / s to 1.25 m / s.

[0016] The rated supply flow rate of hot water is a flow rate that ensures the safety and durability of the floor heating hot water panel, particularly the heat exchange pipe, and that can be stably supplied from outside the floor heating hot water panel, for example, from a water heater, hot water supply piping, etc. The rated supply flow rate is a flow rate of hot water that can be most economically supplied by the water heater, hot water supply piping, etc. The rated supply flow rate of hot water can be, for example, 0.50 L / min, which is the rated supply flow rate of a water heater.

[0017] The hot water is a heat transfer fluid that is supplied from outside the floor heating hot water panel, flows through a heat exchange pipe, and provides heating by heat exchange. The hot water can be water, antifreeze, heat transfer oil, or other liquids. The hot water can be 20°C to 80°C, 30°C to 70°C, or 40°C to 70°C.

[0018] Furthermore, the present invention can be the floor heating hot water panel, wherein the average value of the inner diameter (D2) of the heat radiation pipe is set within a range of Φ4.22 mm to Φ4.46 mm so that the flow velocity in the pipe is 0.57 m / s to 0.66 m / s when hot water is supplied at a rated supply flow rate, or the average value of the inner diameter (D2) of the heat radiation pipe is set within a range of Φ3.77 mm to Φ3.84 mm so that the flow velocity in the pipe is 0.65 m / s to 0.82 m / s when hot water is supplied at a rated supply flow rate, or the average value of the inner diameter (D2) of the heat radiation pipe 330 is set within a range of Φ3.08 mm to Φ3.22 mm so that the flow velocity in the pipe is 0.94 m / s to 1.20 m / s when hot water is supplied at a rated supply flow rate.

[0019] By setting the average value of the inner diameter (D2) of the heat radiation pipe within any one of the ranges of Φ4.22mm to Φ4.46mm, Φ3.77mm to Φ3.84mm, or Φ3.08mm to Φ3.22mm, the piping can be set up more efficiently, resulting in improved heating efficiency. If the average value of the inner diameter (D2) of the heat radiation pipe is set to less than Φ4.22mm, supplying hot water at the rated supply flow rate and maintaining a flow velocity in the pipe of 0.57m / s to 0.66m / s may result in a decrease in the durability and heat dissipation performance of the pipe. If the average value of the inner diameter (D2) of the heat radiation pipe exceeds Φ4.46mm, it becomes difficult to ensure a flow velocity in the pipe of 0.57m / s to 0.66m / s even when supplying hot water at the rated supply flow rate.

[0020] If the average value of the inner diameter (D2) of the heat dissipation pipe is set to less than Φ3.77 mm, supplying hot water at the rated supply flow rate and keeping the flow velocity in the pipe at 0.65 m / s to 0.82 m / s may result in a decrease in the durability and heat dissipation performance of the pipe.If the average value of the inner diameter (D2) of the heat dissipation pipe exceeds Φ3.84 mm, it becomes difficult to ensure a flow velocity in the pipe of 0.65 m / s to 0.82 m / s even when supplying hot water at the rated supply flow rate.

[0021] If the average value of the inner diameter (D2) of the heat dissipation pipe is set to less than Φ3.08 mm, supplying hot water at the rated supply flow rate and maintaining a flow velocity in the pipe of 0.94 m / s to 1.20 m / s may result in a decrease in the durability and heat dissipation performance of the pipe.If the average value of the inner diameter (D2) of the heat dissipation pipe exceeds Φ3.22 mm, it becomes difficult to ensure a flow velocity in the pipe of 0.94 m / s to 1.20 m / s even when supplying hot water at the rated supply flow rate.

[0022] When the average inner diameter (D2) of the heat dissipation pipe is set to Φ4.22mm to Φ4.46mm, if the flow velocity in the pipe is less than 0.57m / s, there is a risk of the air cooling down while passing through the pipe, and if it exceeds 0.66m / s, the durability required of the heat dissipation pipe becomes high, and the wall thickness increases, which may result in a decrease in heat dissipation.When the average inner diameter (D2) of the heat dissipation pipe is set to Φ3.77mm to Φ3.84mm, if the flow velocity in the pipe is less than 0.65m / s, there is a risk of the air cooling down while passing through the pipe, and if it exceeds 0.82m / s, there is a risk of the air cooling down while passing through the pipe, and if it exceeds 0.82m / s, the durability required of the heat dissipation pipe becomes high, and the wall thickness increases, which may result in a decrease in heat dissipation. Furthermore, when the average value of the inner diameter (D2) of the heat dissipation pipe is set to Φ3.08 mm to Φ3.22 mm, if the flow velocity in the pipe is less than 0.94 m / s, there is a risk that the air will cool down while passing through the pipe, and if it exceeds 1.20 m / s, the durability required of the heat dissipation pipe will increase, and the wall thickness will increase, which may result in a decrease in heat dissipation performance.

[0023] The present invention may also be a floor heating hot water panel in which the ratio (D1) / (D2) of the inner diameter (D1) of the outbound pipe or inbound pipe to the inner diameter (D2) of the heat radiation pipe is set to be 1.223 to 4.168.

[0024] By setting the inner diameter (D1) of the outgoing or return pipe / the inner diameter (D2) of the heat radiation pipe to 1.223 to 4.168, the amount of heat radiation above the floor can be improved. If the inner diameter (D1) of the outgoing or return pipe / the inner diameter (D2) of the heat radiation pipe is less than 1.223, when multiple heat radiation pipes are connected between the outgoing pipe and the return pipe, a sufficient flow rate of hot water cannot be obtained by supplying at the rated supply flow rate. On the other hand, if the ratio exceeds 4.168, the hot water supplied at the rated supply flow rate will stagnate in the outgoing pipe for a long time, cooling and causing temperature unevenness in the floor heating hot water panel, which may prevent uniform heating over the entire surface.

[0025] The present invention may also be directed to the floor heating hot water panel, wherein the ratio (T1) / (D1) of the inner diameter (D1) of the outgoing pipe or the return pipe to the minimum cross-sectional thickness (T1) of the outgoing pipe or the return pipe is 0.20 to 0.30, and the ratio (T2) / (D2) of the inner diameter (D2) of the cross-sectional surface of the heat radiation pipe to the minimum cross-sectional thickness (T2) of the heat radiation pipe is 0.268 to 0.55.

[0026] By setting the (T1) / (D1) ratio to 0.20 to 0.30, the heat dissipation efficiency of the outgoing pipe or the return pipe can be improved. If the (T1) / (D1) ratio is less than 0.20, the pressure resistance and heat resistance strength of the outgoing pipe or the return pipe may decrease. Furthermore, if it exceeds 0.30, sufficient heat dissipation performance may not be obtained. The minimum thickness (T1) of the cross section of the outgoing pipe or the return pipe is preferably set to the minimum thickness (T1) of the range that will be the upper surface of the outgoing pipe or the return pipe when the floor heating hot water panel is installed, for example, and the amount of heat dissipation from the upper surface of the floor heating hot water panel can be increased.

[0027] By setting the (T2) / (D2) ratio to 0.268 to 0.55, the heat dissipation efficiency of the heat dissipation pipe can be improved. If the (T2) / (D2) ratio is less than 0.268, the durability of the heat dissipation pipe may be reduced. If the (T2) / (D2) ratio exceeds 0.55, sufficient heat dissipation performance may not be ensured. The minimum wall thickness (T2) of the heat dissipation pipe is preferably set to the minimum wall thickness (T2) of the range that will become the upper surface of the heat dissipation pipe when the floor heating hot water panel is installed, for example, and the amount of heat dissipated from the upper surface of the floor heating hot water panel can be increased.

[0028] The inner diameter (D1) of the cross section of the outward or return pipe, or the inner diameter (D2) of the heat radiation pipe, can be the diameter of the largest diameter portion of the flow path of each pipe. For example, it can be the inner diameter of a circular flow path, or the major diameter of an elliptical or oval flow path, or the length of the longest diagonal of a polygonal cross section of a flow path. Furthermore, the inner diameter (D1) of the cross section of the outward or return pipe, or the inner diameter (D2) of the cross section of the heat radiation pipe can be the average diameter of the flow path of each pipe.

[0029] The present invention can also be a floor heating hot water panel in which the ratio (BT1) / (D1) of the inner diameter (D1) of the outgoing pipe or the return pipe to the bottom thickness (BT1) of the piping groove directly below the inner diameter (D1) of the outgoing pipe or the return pipe is 0.236 to 0.336, and the ratio (BT2) / (D2) of the inner diameter (D2) of the cross section of the heat dissipation pipe to the bottom thickness (BT2) of the piping groove directly below the heat dissipation pipe is 0.586 to 2.217.

[0030] The bottom thickness (BT) of the cross section of the piping groove of the insulation panel can be said to be the thickness dimension of the insulation material between the underside of the heat exchange pipe and the top surface of the floor underlayment material (such as plywood on joists and floor joists) of the building to which it is installed.

[0031] By setting the ratio (BT1) / (D1) to 0.236 to 0.336, the amount of heat dissipated to the floor can be increased. If the ratio of bottom thickness (BT1) / inner diameter (D1) is less than 0.236, the insulation performance under the floor will decrease, and heat loss to the floor will increase. If the ratio exceeds 0.336, the thickness of the insulation panel will increase, resulting in an increase in the thickness, size, and weight of the floor heating hot water panel, which will result in the disadvantage of narrowing the space inside the installation room, or the inner diameter (D1) of the outbound or inbound pipe will become small, which may make it difficult to obtain a sufficient flow rate.

[0032] By setting the ratio (BT2) / (D2) to 0.586 to 2.217, the amount of heat dissipated to the floor can be increased. If the bottom thickness (BT2) / inner diameter (D2) is less than 0.586, the insulation performance under the floor will decrease, and heat loss to the floor will increase. If it exceeds 2.217, the thickness of the insulation panel will increase, resulting in an increase in the thickness, size, and weight of the floor heating hot water panel, which will result in the disadvantage of narrowing the space inside the installation room or the inner diameter (D2) of the front heat dissipation pipe will become smaller, which may prevent sufficient flow rate from being obtained.

[0033] The present invention can also be a floor heating hot water panel in which the insulation panel has a metal foil layer for heat dissipation provided on the upper surface of the insulation panel and slits for absorbing thermal deformation engraved between the piping paths on the upper surface of the insulation panel.

[0034] The metal foil layer flushes the upper surface of the insulation panel and the upper surface of the heat exchange pipe, efficiently transferring heat from the heat exchange pipe to the upper surface of the insulation panel widely and uniformly, thereby enabling less unevenness and more uniform heat dissipation. The metal foil layer can be made of aluminum, copper, zinc, or an alloy thereof, which have high thermal conductivity. The metal foil layer can be made of an aluminum-zinc alloy, a stainless steel alloy, or the like. The metal foil layer can have a thickness of 0.01 mm to 0.2 mm, for example. The metal foil layer can be made of an aluminum alloy such as JIS (Japanese Industrial Standards) H14-8011 or H18-3003. The JIS H18-3003 material has excellent properties such as strength, corrosion resistance, hydrophilicity, water retention, plate dimensional accuracy, and flatness, making it a more suitable material for the floor heating hot water panel.

[0035] The metal foil layer receives heat from the outbound pipe, inbound pipe, and heat dissipation pipe of the heat exchange pipe and thermally expands in various directions, causing deformation of the metal foil layer itself, but the slits allow strain to escape in the metal foil layer, preventing problems such as wrinkles, cracks, breakage, etc. Furthermore, the slits reduce the deformation stress that the insulation panel and the heat exchange pipe receive due to thermal expansion of the metal foil layer, preventing damage to the insulation panel and the heat exchange pipe.

[0036] The slits may be formed as continuous or discontinuous grooves along the upper edge of the piping groove. The slits may be formed as long cuts in the upper surface of the insulation panel, excluding the heat exchange pipes and the piping groove, in a direction intersecting or perpendicular to the stress direction (compression or tension direction due to thermal expansion).

[0037] The present invention provides a floor heating system that utilizes the floor heating hot water panel, comprising at least one floor heating hot water panel laid on the floor and a water heater connected to the heat exchange pipe and supplying hot water.

[0038] According to the floor heating system, the floor heating hot water panel, which receives hot water at the rated supply flow rate of the hot water heater, can achieve a better heating effect than conventional systems.

[0039] The water heater generates a pipe flow velocity of 0.17 m / s to 0.26 m / s in the outbound and inbound pipes by supplying hot water at the rated supply flow rate of the water heater, and further generates a pipe flow velocity of 0.10 m / s to 1.25 m / s in the heat dissipation pipe, thereby achieving floor heating that is superior to conventional types. [Effects of the Invention]

[0040] According to the floor heating system using the floor heating hot water panel of the present invention, it is possible to provide a floor heating hot water panel that can improve heating efficiency without increasing the temperature and flow rate of hot water. Also, it is possible to provide a thin and lightweight floor heating hot water panel by reducing the thickness of the insulation panel. Furthermore, it is possible to provide a floor heating hot water panel that reduces deformation due to its own heat. It is possible to provide a floor heating system using the floor heating hot water panel. [Brief explanation of the drawings]

[0041] [Figure 1] (a) Plan view of the floor heating system, (b) Cross-section of the G1-G1 portion of the floor heating hot water panel in Figure 1(a). [Figure 2] Heat exchange pipe and insulation panel: (a) cross-sectional view of the heat exchange pipe, (b) cross-sectional view of the main part of the insulation panel [Figure 3] (a) A plan view showing an example of a slit in a metal foil layer, and (b) a cross-sectional view of the G3-G3 portion of the floor heating hot water panel in FIG. 3(a). [Figure 4] 4(a) shows another example of a slit in a floor heating hot water panel; (b) is a cross-sectional view of the G4-G4 portion of the floor heating hot water panel in FIG. 4(a); [Figure 5] The experimental setup is shown in (a) a plan view of the flooring (heat dissipation part) of the experimental body, (b) a side view of the experimental body, and (c) a bottom view of the joists, insulation material, and underlayment. [Figure 6] The surface temperature distribution diagram of the floor heating hot water panel is shown. (a) Surface temperature distribution diagram of two floor heating hot water panels, (b) Surface temperature distribution diagram of (1) in Figure 6(a). [Figure 7] The surface temperature distribution diagrams of the floor heating hot water panel are shown below. (a) Surface temperature distribution diagram of (2) in Figure 6(a), (b) Surface temperature distribution diagram of (3) in Figure 6(a). [Figure 8] Graph showing changes in floor finishing surface temperature after heating starts [Figure 9] Plan view showing the measurement positions for deformation due to heating of the floor heating hot water panel [Figure 10] Schematic diagrams of the experimental equipment for measuring the pressure loss of circulating hot water in a floor heating system. (a) Schematic diagram of the experimental equipment with one insulation panel. (b) Schematic diagram of the experimental equipment with two insulation panels. [Figure 11] Graph of pressure change versus flow rate for one underfloor heating hot water panel [Figure 12] Graph of pressure change versus flow rate for two floor heating hot water panels [Figure 13] Installation drawing of test specimen for circulating hot water pressure loss test [Figure 14] Drawing showing a floor heating hot water panel in a circulating hot water pressure loss test DETAILED DESCRIPTION OF THE INVENTION

[0042] Hereinafter, a floor heating hot water panel 2 according to this embodiment and a floor heating system 1 using the same will be specifically described with reference to the drawings. In particular, in this embodiment, as shown in Figures 1 to 12 and Tables 1 to 5, tests were conducted on the floor heating hot water panel 2 of the present invention and the floor heating system 1 using the same in accordance with the Excellent Housing Components Performance Test Method, Heating and Cooling System (Heating Unit) BLT HS / Bb-8:2020, heat dissipation characteristics (BLT HS / Bb-803), temperature rise characteristics after start of operation (BLT HS / Bb-801), surface temperature distribution (BLT HS / Bb-802), deformation characteristics due to heating (BLT HS / Bb-801A), and pressure loss of circulating hot water (BLT HS / Bb-817), and the heating performance was compared with that of a conventional product. [Example]

[0043] The floor heating hot water panel 2 of this embodiment has a flat insulating panel 20 made of an insulating material such as closed-cell urethane foam or polystyrene foam, measuring 909mm x 909mm or 303mm x 909mm and having a thickness (PT) of 12.5mm, as shown in Figure 1 and Table 1. Pipe grooves 200 are carved into the upper surface 21 of the insulating panel 20 so that the pipe pitch interval is, for example, 100mm. Table 1 is a table of specifications for the floor heating system. As a result of the above-mentioned test, as will be described later, the floor heating hot water panel 2 of this embodiment was able to increase the proportion of heat dissipation above the floor to the total heat generation amount to 82.3% compared to 74.0% for a conventional equivalent product.

[0044] [Table 1]

[0045] As will be described later, the test results of the floor heating hot water panel 2 of this embodiment showed that the ratio of the heat radiation amount above the floor to the total heat generation amount was 74.0% for a conventional equivalent product, but for the product of this embodiment, it was possible to increase it to 82.3%. Therefore, by satisfying the characteristic conditions such as the ratio of the dimensions of each part of the floor heating hot water panel 2 of this embodiment and the flow velocity in the pipe, it can be said that it is possible to achieve heating performance superior to that of conventional types.

[0046] As shown in Figures 1 to 4, a heat exchange pipe 3 is arranged in the piping groove 200, and the dimensions and shape of the inner wall of the piping groove 200 and the outer wall of the heat exchange pipe 3 are set so that the upper surface 30 of the heat exchange pipe 3 is flush with the upper surface 21 of the insulation panel 20, and so that they are in close contact with each other. The piping groove 200 has an outward groove 201 and a return groove 202 that are parallel to each other on the upper surface 21 of the insulation panel 20, and one or more heat dissipation grooves 203, each having an upstream end connected to the outward groove 201 and a downstream end connected to the return groove 202. The outward groove 201 can be arranged so as to be continuous with the outward groove 201 of an adjacent insulation panel 20. Moreover, the return groove portion 202 can be arranged so as to be continuous with the return groove portion (202) of the adjacently arranged heat insulating panel (20).

[0047] The heat exchange pipe 3 is made of, for example, ethylene propylene diene rubber, and can be composed of an outgoing pipe 310 arranged in the outgoing groove 201, a returning pipe 320 arranged in the returning groove 202, and a heat dissipation pipe 330 arranged in the heat dissipation groove 203. The heat dissipation pipe 330 has an upstream end connected to the outgoing pipe 310 and a downstream end connected to the returning pipe 320.

[0048] The outbound pipe 310 and the return pipe 320 may each have a flow path diameter (inner diameter D1) of 7 mm, and a vertical (L1)×horizontal (L2) dimension of 10.5 mm×10.5 mm of an outer wall cut perpendicular to the flow direction of the hot water 50. The heat dissipation pipe 330 may have a flow path diameter (inner diameter D2) of 5.5 mm, and a vertical (L2)×horizontal (L2) dimension of 9 mm×9 mm of an outer wall cut perpendicular to the flow direction of the hot water 50, or a flow path diameter (inner diameter D2) of 3 mm, and a vertical (L2)×horizontal (L2) dimension of 6 mm×10 mm of an outer wall cut perpendicular to the flow direction of the hot water 50, or a flow path diameter (inner diameter D2) of 1.7 mm, and a vertical (depth) of 6 mm×horizontal (width) of 10 mm of an outer wall cut perpendicular to the flow direction of the hot water 50. The upper surface 21 of the heat insulating panel 20, including the upper surfaces 30 of the heat exchange pipes 3 (the outgoing pipe 310, the return pipe 320 and the heat dissipation pipe 330), has a metal foil layer 4 formed by adhering a metal foil 4 made of an aluminum-zinc alloy having a thickness of, for example, 0.01 mm to 0.2 mm to almost the entire surface.

[0049] The ratio (D1) / (D2) of the inner diameter (D1) of the outbound pipe 310 or the inbound pipe 320 to the inner diameter (D2) of the heat radiation pipe 330 is calculated as follows: (D1)Φ7mm / (D2)Φ5.5 is 1.273, which is 1.223 after subtracting 0.05 as an error. Also, (D1)Φ7mm / (D2)Φ1.7 is 4.118, which is 4.168 after adding 0.05 as an error. Therefore, by setting (D1) / (D2) to be between 1.223 and 4.168, heating efficiency can be improved compared to conventional types.

[0050] The minimum thickness (T1) of the cross section of the Φ7 mm outward pipe 310 and the return pipe 320 is obtained as 1.75 mm from the following formula (1). The minimum thickness (T2) of the cross section of the Φ5.5 mm heat dissipation pipe 330 is obtained as 1.75 mm from the following formula (1). The minimum thickness (T2) of the cross section of the Φ3 mm heat dissipation pipe 330 is obtained as 1.5 mm. The minimum thickness (T2) of the cross section of the Φ1.7 mm heat dissipation pipe 330 is obtained as 2.65 mm from the following formula (1).

[0051] [Number 1] T=(LD) / 2 In the above formula, T is the minimum wall thickness, L is the vertical dimension of the outer wall, and D is the inner diameter of the pipe. It is desirable that the width (horizontal dimension of the outer wall) of the heat radiation pipe is larger than its thickness (vertical dimension of the outer wall). This is because the heat transfer effect of hot water can be improved by reducing the minimum thickness, and the strength of the heat radiation pipe can be increased by increasing the width. Therefore, it is desirable that the width (horizontal dimension of the outer wall) of the heat radiation pipe be 1.2 times or more, and preferably 1.5 times or more, of its thickness (vertical dimension of the outer wall).

[0052] The minimum thickness (T1) of the cross section of the outbound pipe 310 and the inbound pipe 320 / the inner diameter (D1) of the heat exchange pipe is 1.75 mm / Φ7 mm=0.25, and if an error of ±0.05 is included, it is preferable to set it in the range of 0.20 to 0.30.

[0053] The ratio of the minimum cross-sectional thickness (T2) of the heat radiation pipe 330 to the inner diameter (D2) of the heat exchange pipe is 1.75 mm / Φ5.5 = 0.318 when the inner diameter (D2) is Φ5.5, and preferably ranges from 0.268 to 0.368, assuming an error of ±0.05. Furthermore, when the inner diameter (D2) is Φ3, the ratio is 1.5 mm / Φ3 = 0.5, and preferably ranges from 0.45 to 0.5.5, assuming an error of ±0.05. Furthermore, when the inner diameter (D2) is Φ1.7, the ratio is 1.5 mm / Φ1.7 = 0.5, and preferably ranges from 0.45 to 0.5.5, assuming an error of ±0.05. Therefore, the minimum thickness (T2) of the cross section of the heat radiation pipe 330 / the inner diameter (D2) of the heat exchange pipe can be set in the range of 0.268 to 0.55.

[0054] The ratio of the inner diameter (D1) of the cross section of the outbound pipe 310 and the return pipe 320 to the bottom thickness (BT1) of the cross section of the outbound groove 201 and the return groove 202 of the piping path 200 of the insulation panel 20, i.e., bottom thickness (BT1) / inner diameter (D1), is (thickness (PT) of the insulation panel 20 12.5 mm) - (vertical dimension (L1) of the outbound pipe 310 (return pipe 320) 10.5 mm) = 2 mm, and therefore 2 mm / Φ7 mm = 0.285, which, if an error of ±0.05 is included, should be 0.236 to 0.336.

[0055] The ratio of the inner diameter (D2) of the cross section of the heat dissipation pipe 330 to the bottom thickness (BT2) of the cross section of the heat dissipation groove portion 203 of the piping path 200 of the insulation panel 20, i.e., bottom thickness (BT2) / inner diameter (D2), is such that when the inner diameter (D2) of the cross section of the heat dissipation pipe 330 is Φ5.5mm, the bottom thickness (BT2) is (thickness (PT) of the insulation panel 20 12.5mm) - (vertical dimension (L2) of the heat dissipation pipe 330 9mm) = 3.5mm, and 3.5mm / Φ5.5mm = 0.636, which, including an error of ±0.05, should be 0.586 to 0.686.

[0056] When the inner diameter (D2) of the cross section of the heat dissipation pipe 330 is Φ3mm, the bottom wall thickness (BT2) is (thickness (PT) of the insulation panel 20 12.5mm) - (vertical dimension (L2) of the heat dissipation pipe 330 6mm) = 6.5mm, and 6.5mm / Φ3mm = 2.167, which, including an error of ±0.05, should be 2.117 to 2.217.

[0057] When the inner diameter (D2) of the cross section of the heat dissipation pipe 330 is Φ1.7 mm, the bottom wall thickness (BT2) is (thickness of the insulation panel 20 12.5 mm) - (vertical dimension of the heat dissipation pipe 330) 6 mm) = 6.5 mm, and 6.5 mm / Φ1.7 mm = 2.167, which, including an error of ±0.05, should be 2.117 to 2.217.

[0058] Therefore, when the inner diameter (D2) of the cross section of the heat radiation pipe 330 is Φ5.5 to Φ1.7, the bottom wall thickness (BT2) / inner diameter (D2) can be in the range of 0.586 to 2.217.

[0059] As mentioned above, when the inner diameter (D2) is Φ5.5mm to Φ3mm (1.7mm), the ratio (BT2) / (D2) of the inner diameter (D2) of the cross section of the heat dissipation pipe 330 to the bottom thickness (BT2) of the piping groove 200 directly below the heat dissipation pipe 330 should be 0.586 to 2.217.

[0060] (heat dissipation characteristic test equipment) This experiment used the equipment shown in Figures 5 and 13, and the floor heating hot water panel 2 shown in Figure 14, and was conducted in accordance with the Quality Housing Components Performance Test Methodology: Heating and Cooling Systems (Floor Heating Units) BLT HS / Bb-8:2020 Heat Dissipation Characteristics (BLT HS / Bb-803). The test room (constant temperature room) had dimensions of 5400mm x 4500mm x 3736mm height, and used 100mm thick urethane insulation panels as insulation, with a set temperature range of -15°C to +15°C. As shown in Figures 5 and 14, two of the floor heating hot water panels 2 were joined together to form a rectangular shape in plan view and laid on top of an underfloor structure 6 installed horizontally in the test room, and a 12 mm thick floor finishing material (flooring) 60 was placed on top of the two floor heating hot water panels 2, and the test was conducted with both the two floor heating hot water panels 2 and the floor finishing material 60 stacked horizontally. The underfloor structure 6 was an integrated structure consisting of a top plywood panel measuring 2680 mm x 1180 mm x 12 mm thick and a bottom plywood panel measuring 2680 mm x 1180 mm x 6 mm thick, with multiple 45 mm thick joists and multiple 45 mm thick insulating materials sandwiched between them to fill the gaps between the joists. A water heater 5 is connected to the heat exchange pipe 3 of the floor heating hot water panel 2 so as to circulate hot water, and the hot water 50 at 40°C to 70°C is circulated at a rated supply flow rate of 0.50 L / min.

[0061] (Test results for heat dissipation characteristics) The inlet temperature of the hot water 50 to the heat exchange pipe 3 is 60.37°C, the outlet temperature of the heat exchange pipe 3 is 53.06°C, and the rated supply flow rate of the hot water 50 to the heat exchange pipe 3 is 0.50 L / min. As a result of the experiment, the heat radiation amount Q of the heat exchange pipe 3 was 255.0 W, the actual heat radiation amount Q' of the floor heating hot water panel 2 was 233.6 W, the heat radiation amount above the floor Qg was 192.3 W (percentage of the total heat radiation amount: 82.3%), the heat radiation amount below the floor Qd = Q' - Qu was 41.3 W (percentage of the total heat radiation amount: 17.7%), the ratio of the measurement area by the heat flow meter to the heat radiation area was 93.6%, the average above-floor air temperature θi was 18.0°C, the average below-floor air temperature θo was 4.0°C, the average above-floor surface temperature θis was 28.4°C, the average below-floor surface temperature θos was 5.5°C, and the above-floor globe temperature θ B is 18.3℃(△θ B =θ B― θ i =0.3), indoor wall surface temperature θ us is 17.6℃, and the outdoor wall surface temperature θ ds The temperature was 4.5° C. The actual heat radiation amount Q′ of the floor heating hot water panel 2 was calculated by the following [Equation 2].

[0062] [Number 2] Q'=Q·(1-L1-L2) / L(W) L: Total pipe length from the inlet temperature measurement position to the outlet temperature measurement position L1: Pipe length from the panel inlet to the inlet temperature measurement position L2: Pipe length from the panel outlet to the outlet temperature measurement position

[0063] (Flow velocity in the pipe) As shown in Table 2, the flow velocity in the pipe (panel flow velocity) was compared between the floor heating hot water panel 2 of this embodiment (insulation panel 20 thickness: 12 mm) and a conventional floor heating hot water panel (insulation panel thickness: 15 mm). Table 2 shows the experimental results of the flow velocity in the pipe of the floor heating hot water panel 2. The rated supply flow rate of the hot water 50 of the hot water heater 5 is 0.5 L / min. When the inner diameter (D1) of the outbound pipe 310 and the return pipe 320 (main piping in the upper row of Table 2) of the heat exchange pipe 3 of this embodiment is Φ7 mm, the panel flow rate was 22.05 L / min and the flow velocity in the pipe was 0.21 m / s. In the case of the floor heating hot water panel 2 of this embodiment, which is 909 mm x 909 mm x 12 mm thick (type 909H in the upper row of Table 2), when the inner diameter (D2) of the heat dissipation pipe 330 of the heat exchange pipe 3 of this embodiment is Φ5.5 mm and Φ3.0 mm (average Φ3.72 mm), the panel flow rate was 0.5 L / min and the flow velocity inside the pipe was 0.77 m / s.

[0064] [Table 2]

[0065] Furthermore, in the case of the floor heating hot water panel 2 of this embodiment, which is 909 mm x 303 mm x 12 mm thick (303T type in the upper row of Table 2), when the inner diameter (D2) of the heat dissipation pipe 330 of the heat exchange pipe 3 is Φ5.5 mm and Φ1.7 mm (average Φ4.17 mm), the panel flow rate was 0.26 L / min and the flow velocity in the pipe was 0.61 m / s.

[0066] Furthermore, in the case of the floor heating hot water panel 2 of this embodiment, which is 909 mm x 303 mm x 12 mm thick (303Y type in the upper row of Table 2), when the inner diameter (D2) of the heat dissipation pipe 330 of the heat exchange pipe 3 is Φ5.5 mm and Φ1.7 mm (average Φ3.03 mm), the panel flow rate was 0.09 L / min and the flow velocity in the pipe was 1.15 m / s.

[0067] (conventional flow velocity in pipe) When the inner diameter (D1) of the outbound and inbound pipes (main piping in the lower row of Table 2) of the heat exchange pipes of a conventional floor heating hot water panel was Φ8mm, the panel flow rate was 30.31L / min and the flow velocity in the pipes was 0.16m / s. For a conventional floor heating hot water panel of 909mm x 909mm x 15mm thick (909H type in the lower row of Table 2), when the inner diameter (D2) of the heat exchange pipe 330 of the heat radiation pipe was Φ6.0mm and Φ3.0mm (average Φ3.89mm), the panel flow rate was 0.57L / min and the flow velocity in the pipes was 0.70m / s.

[0068] Furthermore, for a conventional floor heating hot water panel measuring 909 mm x 303 mm x 15 mm thick (Model 303T in the bottom row of Table 2), when the inner diameter (D2) of the heat exchange pipe 330 of the heat dissipation pipe was Φ6.0 mm and Φ1.7 mm (average Φ4.51 mm), the panel flow rate was 0.31 L / min and the flow velocity in the pipe was 0.52 m / s.

[0069] Furthermore, for a conventional floor heating hot water panel measuring 909 mm x 303 mm x 15 mm thick (303Y type in the bottom row of Table 2), when the inner diameter (D2) of the heat exchange pipe 330 of the heat dissipation pipe was Φ6.0 mm and Φ1.7 mm (average Φ3.27 mm), the panel flow rate was 0.13 L / min and the flow velocity in the pipe was 0.99 m / s.

[0070] From the above experimental results of the flow velocity in the pipes, when hot water is supplied at the rated supply flow rate to the forward pipe 310 and the return pipe 320 (main pipe) in this embodiment, whose inner diameter (D1) of the heat exchange pipe 3 is Φ7 mm (main pipe), the flow velocity in the pipes is 0.21 m / s, and when hot water 50 is supplied at the rated supply flow rate to the conventional forward pipe 310 and return pipe 320 with an inner diameter (D1) of Φ8 mm, the flow velocity in the pipes is 0.16 m / s. Therefore, it is desirable that the flow velocity in the outgoing pipe 310 and the return pipe 320 when the hot water 50 is supplied at a rated supply flow rate to the outgoing pipe 310 and the return pipe 320 be set to 0.17 m / s or more, which is slightly higher than the conventional pipe flow velocity of 0.16 m / s, and further set to 0.26 m / s or less, which is obtained by adding an error (+0.05 m / s) to the pipe flow velocity of 0.21 m / s in the outgoing pipe 310 and the return pipe 320 of this embodiment. In other words, it is desirable that the inner diameter (D1) of the outgoing pipe 310 and the return pipe 320 be set in the range of Φ6 (Φ7 mm - (error 1.0)) to Φ7.9 (Φ8 mm - (error 0.1)) so that the pipe flow velocity is 0.17 m / s to 0.21 m / s when the hot water 50 is supplied at a rated supply flow rate.

[0071] When hot water 50 was supplied at the rated supply flow rate to the heat radiation pipe 330 of the heat exchange pipe of this embodiment, the flow velocity in the pipe was 0.61 m / s when the average inner diameter (D2) of the heat radiation pipe 330 was Φ4.17 mm (top row, 303T type, Table 2).When the average inner diameter (D2) of the conventional heat radiation pipe 330 was Φ4.51 mm (bottom row, 303T type, Table 2), the flow velocity in the pipe was 0.52 m / s.

[0072] Therefore, when the heat dissipation pipe 330 supplies hot water 50 at the rated supply flow rate, it is desirable to set the average inner diameter (D2) of the heat dissipation pipe 330 within the range of Φ4.22 mm (Φ4.17 mm - (error 0.05 mm)) to Φ4.46 mm (Φ4.51 - ((error 0.05 mm)) so that the flow velocity inside the pipe is 0.57 m / s (0.52 m / s - (error 0.05 m / s)) to 0.66 m / s (0.61 m / s + (error 0.05 m / s)).

[0073] When hot water 50 was supplied at the rated supply flow rate to the heat radiation pipe 330 (909H type) of the heat exchange pipe of this embodiment, the flow velocity in the pipe was 0.77 m / s when the average inner diameter (D2) of the heat radiation pipe 330 was Φ3.72 mm (909H type, upper row in Table 2).When the average inner diameter (D2) of the conventional heat radiation pipe 330 was Φ3.89 mm (909H type, lower row in Table 2), the flow velocity in the pipe was 0.70 m / s.

[0074] Therefore, when the heat dissipation pipe 330 supplies hot water 50 at the rated supply flow rate, it is desirable to set the average inner diameter (D2) of the heat dissipation pipe 330 within the range of Φ3.77 mm (Φ3.72 mm - (error 0.05 mm)) to Φ3.84 mm (Φ3.89 - ((error 0.05 mm)) so that the flow velocity inside the pipe is 0.65 m / s (0.70 m / s - (error 0.05 m / s)) to 0.82 m / s (0.77 m / s + (error 0.05 m / s)).

[0075] When hot water 50 was supplied at the rated supply flow rate to the heat radiation pipe 330 of the heat exchange pipe, the flow velocity in the pipe was 1.15 m / s when the average inner diameter (D2) of the heat radiation pipe 330 was Φ3.03 mm (Table 2, upper row, 303Y type).When the average inner diameter (D2) of the conventional heat radiation pipe 330 was Φ3.27 mm (Table 2, lower row, 303Y type), the flow velocity in the pipe was 0.99 m / s.

[0076] Therefore, when the heat dissipation pipe 330 supplies hot water 50 at the rated supply flow rate, it is desirable to set the average inner diameter (D2) of the heat dissipation pipe 330 within the range of Φ3.08 mm (Φ3.03 mm - (error 0.05 mm)) to Φ3.22 mm (Φ3.27 - ((error 0.05 mm)) so that the flow velocity inside the pipe is 0.94 m / s (0.99 m / s - (error 0.05 m / s)) to 1.20 m / s (1.15 m / s + (error 0.05 m / s)).

[0077] In other words, the flow velocity in the heat dissipation pipe 330 is set to 0.10 m / s or more, which is slightly higher (+0.01 m / s) than the maximum flow velocity of 0.99 m / s in the conventional heat dissipation pipe 330 (303Y type in the lower row of Table 2). Furthermore, the flow velocity is set to less than 1.25 m / s, which is the maximum flow velocity in the pipe of this embodiment, 1.15 m / s, of the heat dissipation pipe 330 (303Y type in the upper row of Table 2), plus +0.10 m / s as an error.

[0078] As mentioned above, it has been found that the floor heating hot water panel 2 of this embodiment can achieve a higher heating efficiency (the proportion of the above-floor heat dissipation Qg192.3W to the total heat dissipation: 82.3%) than the conventional type (the proportion of the above-floor heat dissipation Qu173.4W to the total heat dissipation: 74.0%). Therefore, it is desirable to set the inner diameter (D2) of the heat dissipation pipe 330 so that the flow velocity in the pipe is 0.10 m / s to 1.25 m / s when hot water 50 is supplied at the rated supply flow rate.

[0079] In a previous heat dissipation characteristic (BLT HS / Bb-803) test (test date: February 22, 2017) conducted on a conventional 15 mm thick floor heating hot water panel, the inlet temperature of the heat exchange pipe 50 was 60.06°C, the outlet temperature of the heat exchange pipe 3 was 53.67°C, and the rated supply flow rate of the hot water 50 to the heat exchange pipe was 0.57 L / min. As a result of the experiment, the heat radiation amount Q of the heat exchange pipe was 256.0W, the actual heat radiation amount Q' of the floor heating hot water panel was 234.4W, the heat radiation amount above the floor Qu was 173.4W (percentage of total heat radiation amount: 74.0%), the heat radiation amount below the floor Qd = Q' - Qu was 61.0W (percentage of total heat radiation amount: 26.0%), the ratio of the measurement area by the heat flow meter to the heat radiation area was 88.2%, the average air temperature above the floor θi was 17.8℃, the average air temperature below the floor θo was 4.5℃, the average surface temperature above the floor θis was 26.6℃, the average surface temperature below the floor θos was 4.6℃, and the globe temperature above the floor θ B is 17.9℃(△θ B =θ B― θ i =0.1), indoor wall surface temperature θ us is 17.6℃, and the outdoor wall surface temperature θ ds was 4.5℃.

[0080] As mentioned above, compared to the above-floor heat dissipation amount Qu of 173.4 W (percentage of total heat dissipation: 74.0%) of a conventional floor heating hot water panel, the floor heating hot water panel 2 of this embodiment can achieve more efficient heating with an above-floor heat dissipation amount Qg of 192.3 W (percentage of total heat dissipation: 82.3%). Furthermore, while the flow velocity in the pipe of the conventional floor heating hot water panel was 0.52 m / s to 0.99 m / s, the flow velocity in the pipe of the floor heating hot water panel 2 of this embodiment was 0.21 m / s to 1.15 m / s. This makes it clear that the floor heating hot water panel 2 of this embodiment has a faster flow velocity in the pipe than the conventional type and has superior heating efficiency. The flow velocity in the pipe of the floor heating hot water panel 2 of this embodiment can be set to a range between a flow velocity faster than the flow velocity in the pipe of conventional types, 0.99 m / s, and a flow velocity equivalent to the flow velocity in the pipe of this embodiment, 1.15 m / s, thereby further improving heating efficiency. Therefore, as mentioned above, it is desirable that the flow velocity in the outgoing pipe and the return pipe be approximately 0.17 m / s to 0.26 m / s, and that the flow velocity in the heat dissipation pipe be approximately 0.10 m / s to 1.25 m / s. In the above experimental example, even if the average inner diameter (D2) of the heat dissipation pipe 330 is the same, by reducing the inner diameters of the outward pipe 310 and the return pipe 320 and increasing the flow rate of the liquid flowing inside, it is possible to increase the speed of the liquid flowing into the heat dissipation pipe 330 and the liquid flowing out of the heat dissipation pipe 330, and the flow rate of the liquid throughout each floor heating hot water panel is increased. As a result, it is believed that the floor heating hot water panel 2 of this embodiment has a significantly improved amount of heat dissipation above the floor compared to conventional floor heating hot water panels 2.

[0081] (Temperature rise characteristics and surface temperature distribution test after the first operation start) Using the equipment shown in Figures 5 and 13, and the floor heating hot water panel 2 shown in Figure 14, the floor heating hot water panel 2 was placed on a stand for installing the test specimen, and tests were conducted on the temperature rise characteristics after the start of operation and the surface temperature distribution in accordance with the temperature rise characteristics after the start of operation (BLT HS / Bb-801) and the surface temperature distribution (BLT HS / Bb-802) of the Excellent Housing Components Performance Test Method Manual for Heating and Cooling Systems (Floor Heating Units) BLT HS / Bb-8:2020. (First test results of surface temperature distribution) Exam date: July 15, 2022 The test results are shown in Figures 6 to 8. The floor surface temperatures were 30.1°C at measurement point (A), 29.1°C at measurement point (B), 28.1°C at measurement point (C), 30.4°C at measurement point (D), and 29.1°C at measurement point (E). The temperature inside the test room was 18.3°C, the wall surface temperature inside the test room was 17.9°C, the inlet temperature of the hot water 50 of the floor heating hot water panel 2 was 61.1°C, the outlet temperature of the hot water 50 of the floor heating hot water panel 2 was 54.5°C, and the flow rate of the hot water 50 of the floor heating hot water panel 2 was 0.52 L / min. The areas indicated by the line frames (1) and (3) in Figure 6(a) indicate the ranges of the first and second floor heating hot water panels 2, and the line frame (2) indicates the joint position of the two floor heating hot water panels 2.

[0082] (Results of the second surface temperature distribution test) Exam date: August 4, 2022 The test results are not shown, but only the results are shown. The floor surface temperatures were 23.0°C at measurement point (A) in Figure 6, 23.8°C at measurement point (B), 21.1°C at measurement point (C), 23.1°C at measurement point (D), and 23.5°C at measurement point (E). The temperature inside the test room was 18.8°C, the wall surface temperature inside the test room was 18.7°C, the inlet temperature of the hot water 50 of the floor heating hot water panel 2 was 60.5°C, the outlet temperature of the hot water 50 of the floor heating hot water panel 2 was 56.8°C, and the flow rate of the hot water 50 of the floor heating hot water panel 2 was 0.50 L / min.

[0083] (Test results of temperature rise characteristics after starting operation) Exam date: July 14, 2022 The time it took for the surface temperature to reach 80% of the difference between the saturated surface temperature and the room temperature at that time was measured. In Figure 6, the time was 28 minutes at measurement point (A), 34 minutes at measurement point (B), 32 minutes at measurement point (C), 27 minutes at measurement point (D), and 33 minutes at measurement point (E), with an average of 31 minutes. Figure 8 shows the test results for the temperature rise characteristics after operation started.

[0084] (Deformation characteristics test due to heating) Exam period: August 17, 2022 - August 19, 2022 In this experiment, in order to confirm the deformation characteristics due to heating of the floor heating hot water panel 2, the test items shown in the deformation characteristics due to heating (BLT HS / Bb-810A) were carried out in accordance with the Good Housing Components Performance Test Method Book Heating and Cooling System (Floor Heating Unit) BLT HS / Bb-8:2020. 9, the deformation characteristic test due to heating was performed by installing digital dial gauges in a total of six directions to measure the amount of deformation of the two floor heating hot water panels 2 joined to form a rectangle in plan view: horizontal directions CH1 and CH2 perpendicular to the outer side walls of the two insulating panels 20 that form the short sides of the rectangle, horizontal directions CH3 and CH4 perpendicular to the outer side wall of one of the insulating panels 20 that forms each long side of the rectangle, and vertical directions CH5 and CH6 perpendicular to the top surfaces 21 of the two insulating panels 20 near the mutual joining ends. The deformation characteristic test due to heating was performed with the floor finishing material (flooring) 60 stacked on top of the two floor heating hot water panels 2, as with the testing device.

[0085] The displacement in the long side direction of the two floor heating hot water panels 2 joined to form a rectangle in plan view was δ1 = (CH1 + CH2), the displacement in the short side direction was δ2 = (CH3 + CH4), and the uplift displacement was δ3 = Max (CH5 or CH6). The test results for deformation characteristics due to heating are shown in Table 3, where the displacement in the long side direction δ1 was 0.1 mm, the displacement in the short side direction along the long side δ2 was 0.1 mm, and the uplift displacement δ3 was 0.5 mm. Table 3 is a table of specifications for the floor heating hot water panel 2 and the heat exchange pipe 3.

[0086] [Table 3]

[0087] As shown in Figures 3 and 4, the floor heating hot water panel 2 is provided with slits 40 to prevent damage such as wrinkles, cracks, and tears due to plastic deformation of the metal foil layer 4 caused by deformation of the insulation panel 20 due to heating. The slits 40 are effective enough to interrupt the continuity of the metal foil layer 4, so the gap dimension 41 between the opening edges of the slits 40 can be substantially 0 mm. The slits 40 can be formed by cutting the metal foil layer 4 along the opening edges of the piping grooves 200, or can be distributed at approximately equal intervals of, for example, 20 mm to 100 mm on the upper surface 21 of the insulation panel 20 excluding the piping grooves 200, so that shear forces acting in the planar (horizontal) direction on the metal foil layer 4 can be interrupted.

[0088] (Circulating hot water pressure loss test) This experiment was conducted in accordance with the Good Housing Component Performance Test Methodology, Heating and Cooling Systems (Floor Heating Units) BLT HS / Bb-8:2020 18. Circulating Hot Water Pressure Loss BLT HS / Bb-817) to confirm the pressure loss of the floor heating hot water panel 2. As before, the experiment was conducted using the equipment shown in Figures 5 and 13, using the floor heating hot water panel 2 shown in Figure 14. The test conditions were as follows: one test piece shown in Figure 14 was used, and two panels were arranged in parallel. The test was conducted in two cases: one with a single floor heating hot water panel 2 (909mm x 909mm) as shown in Figure 10(a), and two with two floor heating hot water panels 2 (909mm x 909mm) as shown in Figure 10(b). As shown in Figures 10(a) and (b), a constant temperature water circulation device 52 was placed at a position corresponding to the hot water supply device 5, and measurements were taken by installing instruments 7, including an inlet pressure gauge 70, an outlet pressure gauge 71, and an ultrasonic flow meter 72, in each device.

[0089] As shown in Table 4 below and Figure 11, when there was one floor heating hot water panel 2, a pressure loss of 12.9 kpa to 39.1 kpa occurred with a change in flow rate of 0.21 L / min to 0.50 L / min. Table 4 shows the pressure loss for a single floor heating hot water panel 2 with respect to the flow rate, and Figure 11 shows the experimental results when there was one floor heating hot water panel 2. [Table 4]

[0090] As shown in Table 5 below and Figure 12, when there were two floor heating hot water panels 2, a pressure loss of 63.8 kpa to 17.7 kpa occurred with a change in flow rate of 1.2 L / min to 0.6 L / min. Table 5 shows the pressure loss for two floor heating hot water panels 2 with respect to the flow rate, and Figure 12 shows the experimental results for the case of two floor heating hot water panels.

[0091] [Table 5] [Industrial Applicability]

[0092] The floor heating hot water panel of the present invention and the floor heating system using it can be used for floor heating in buildings, as well as for heating systems for bedrock baths, heating systems for agricultural greenhouses, snow melting and snow removal systems for outdoor pavements or building roofs, and heating systems for water tanks, etc. [Explanation of symbols]

[0093] 1. Floor heating system 2. Floor heating hot water panel 20. Insulation panel (PT)21 Thickness of the insulation panel 21 Same top side 23 Same bottom 200 Same pipe groove 201 Same outward groove 202 Same as above Return groove 203 Heat dissipation groove (BT1) Bottom thickness of the outward groove or return groove (BT2) Bottom thickness of the heat dissipation groove 3 Heat exchange pipe 30 Same top side 310 Same outward pipe 311 Same top side (D1) Same inner diameter (L1) Same vertical (depth) dimension 320 Same return pipe 321 Same as above (T1) Minimum thickness 330 Heat dissipation pipe 331 Same top side (D2) Same inner diameter (or average inner diameter) (L2) Same vertical (depth) dimension (T2) Minimum thickness 4 Metal foil layer 40 Same slit 41 Same gap dimensions 5. Hot water supply equipment 50 Same as above Hot water 52 Constant temperature water circulation device 6 Underfloor structure 60 Floor finishing materials (flooring) 7 Instruments 70 Inlet pressure gauge 71 Same outlet pressure gauge 72 Ultrasonic flowmeter

Claims

1. an insulating panel of a predetermined thickness made of a flat insulating material; A piping groove recessed in the upper surface of the heat insulating panel; a heat exchange pipe disposed in the piping groove; and the piping groove has an outward groove portion, a return groove portion, and a heat dissipation groove portion whose upstream end is connected to the outward groove portion and whose downstream end is connected to the return groove portion, the heat exchange pipe includes an outgoing pipe disposed in the outgoing groove, a return pipe disposed in the return groove, and a heat dissipation pipe disposed in the heat dissipation groove, the upstream end of which is connected to the outgoing pipe and the downstream end of which is connected to the return pipe; The inner diameters (D1) of the outgoing pipe and the return pipe are set so that the flow velocity in the pipe when hot water is supplied to the heat exchange pipe at a rated supply flow rate is 0.17 m / s to 0.26 m / s, The inner diameter (D2) of the heat radiation pipe is set so that the flow velocity in the pipe when hot water is supplied to the heat exchange pipe at a rated supply flow rate is 0.10 m / s to 1.25 m / s.

2. The floor heating hot water panel of claim 1, wherein the inner diameter (D1) of the outbound pipe and the inbound pipe is set within the range of Φ6 mm to Φ7.9 mm so that when hot water is supplied at a rated supply flow rate, the flow velocity in the pipe is 0.17 m / s to 0.21 m / s.

3. The average value of the inner diameter (D2) of the heat radiation pipe is set within a range of Φ4.22 mm to Φ4.46 mm so that when hot water is supplied at a rated supply flow rate, the flow velocity in the pipe is 0.57 m / s to 0.66 m / s, or The average value of the inner diameter (D2) of the heat radiation pipe is set within a range of Φ3.77 mm to Φ3.84 mm so that when hot water is supplied at a rated supply flow rate, the flow velocity in the pipe is 0.65 m / s to 0.82 m / s, or Alternatively, the average value of the inner diameter (D2) of the heat radiation pipe 330 is set within a range of Φ3.08 mm to Φ3.22 mm so that when hot water is supplied at a rated supply flow rate, the flow velocity in the pipe is set to 0.94 m / s to 1.20 m / s.

2. The floor heating hot water panel according to claim 1, wherein the floor heating hot water panel is any one of the above.

4. A floor heating hot water panel as described in claim 1, wherein the ratio (D1) / (D2) of the inner diameter (D1) of the outbound pipe or return pipe to the inner diameter (D2) of the heat dissipation pipe is set to be 1.223 to 4.

168.

5. The ratio (T1) / (D1) of the inner diameter (D1) of the outgoing pipe or the return pipe to the minimum wall thickness (T1) of the cross section of the outgoing pipe or the return pipe is 0.20 to 0.30, The ratio (T2) / (D2) of the inner diameter (D2) of the cross section of the heat radiation pipe to the minimum thickness (T2) of the cross section of the heat radiation pipe is 0.268 to 0.

55.

6. The ratio (BT1) / (D1) of the inner diameter (D1) of the outgoing pipe or the return pipe to the bottom thickness (BT1) of the piping groove directly below the inner diameter (D1) of the outgoing pipe or the return pipe is 0.236 to 0.336; The ratio (BT2) / (D2) of the inner diameter (D2) of the cross section of the heat radiation pipe to the bottom thickness (BT2) of the piping groove directly below the heat radiation pipe is 0.586 to 2.

217. The floor heating hot water panel according to claim 1.

7. The heat insulating panel is a heat dissipating metal foil layer provided on the upper surface of the heat insulating panel; slits for absorbing thermal deformation carved between the piping paths on the upper surface of the heat insulating panel; 2. The floor heating hot water panel according to claim 1, comprising:

8. At least one floor heating hot water panel laid on the floor; a hot water supply device connected to the heat exchange pipe and supplying hot water; A floor heating system using the floor heating hot water panel according to any one of claims 1 to 4.

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