JP2018059653A - Floor heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water circulation type floor heating system which combines a gas heat source device and a solar heat collection device as a heat source, which can achieve further energy saving and which can acquire a more comfortable heating effect.SOLUTION: A floor heating system includes: a hot water circulation type floor heating device 1 in which flooring is laid on an upper surface of a heat radiation panel: a gas heat source device 5 including a heat exchanger 53 and a gas burner 54 for heating this; a solar heat collection device 4 for passing water in a heat collection pipe and generating hot water by solar heat; a first hot water circulation path in which hot water is circulated between the floor heating device 1 and the gas heat source device 5; a second hot water circulation path in which hot water is circulated between the floor heating device 1 and the solar heat collection device 4; and a flow passage switching mechanism for switching the first hot water circulation path and the second hot water circulation path, and control means 9. The flooring of the floor heating device 1 has a latent heat storage material stored on the rear surface side, and it has a heat storage function.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a floor heating system, and more particularly, is a hot water circulation type floor heating system that uses a gas heat source device and a solar collector as heat sources to save energy. It is about the system.

  In a hot water circulation floor heating system, it is obtained by using a combined gas heat source device equipped with a heating burner in addition to a hot water burner for supplying hot water to a bath or kitchen, or a gas heat source device dedicated to heating. The room is heated by circulating the generated hot water to the floor heating device. From the viewpoint of energy saving, a technique of using a solar collector (solar collector) as a heat source has been proposed. For example, in a floor heating system that also uses a solar collector, the heat obtained by the solar collector is recovered in a hot water storage tank, and returned hot water circulated from the gas heat source device to the floor heating device. There is a solar-powered gas hot water system that detects the temperature and, when this is higher than the temperature of the hot water in the hot water storage tank, collects part of the heat of the returned hot water in the hot water storage tank. In such a system, the amount of gas consumed is reduced by using solar heat for hot water supply to the bath or kitchen, and the temperature of the hot water returned from the floor heating device is lowered in the hot water storage tank, thereby Thermal efficiency is increased (Patent Document 1).

  On the other hand, in the floor heating system, hot water of about 60 ° C. is circulated to the floor heating device according to the set room temperature during steady operation, but in order to obtain a heating effect in a short time at the start of heating operation, Many techniques for performing a rapid heating operation called so-called hot dash operation in which hot water of about 20 ° C., for example, about 80 ° C. is circulated for about 30 to 60 minutes have been proposed (Patent Document 2).

Japanese Patent Laying-Open No. 2015-194314 JP 2007-85662 A

  By the way, the conventional floor heating system using solar heat is intended to reduce the gas consumption in the gas heat source device by using the heat obtained by the solar collector for hot water supply. When hot dash operation is performed, a heating effect can be obtained in a short time, but a problem arises in that the amount of gas consumption increases by increasing the temperature of the hot water. Furthermore, in a system that performs hot dash operation, high-temperature hot water is required because the room temperature does not reach the set temperature even in open spaces such as corridors and bathrooms and even in rooms with large temperature changes, even though the floor is warm. As a result, it is supplied to the floor heating device. As a result, the gas consumption cannot be reduced, and an excessive temperature rise of the floor may be caused.

  Further, in the floor heating system, for example, when a plurality of floor heating devices having different heat dissipation characteristics are used for a plurality of rooms, and hot water is supplied from a common gas heat source device by connecting them in parallel, the temperature of the floor surface Since the rising speed differs depending on the heat dissipation characteristics of the floor heating device, the floor surface temperature varies depending on the room even when hot dash operation is performed for a certain time.

  The present invention has been made in view of the above circumstances, and an object thereof is a hot water circulation type floor heating system using a gas heat source device and a solar collector as a heat source, and further energy saving is achieved. It is another object of the present invention to provide a floor heating system that can achieve a more effective heating effect.

  In order to solve the above problems, in the present invention, hot water obtained by a solar collector is directly supplied to a floor heating device during the daytime, and hot water obtained from a gas heat source device is supplied to the floor heating device at night or the like. In addition, a flooring having a heat storage function in which a latent heat storage material is accommodated is used as flooring for the floor heating device, and a part of solar heat is stored in the floor heating device, so that the heat source is gas from the solar collector. When switching to a heat source device, a steady operation by a gas heat source device was performed without performing a hot dash operation.

  That is, the gist of the present invention is a hot water circulation type floor heating system that uses a gas heat source device and a solar collector together, and a heat dissipating panel in which a water pipe is embedded is disposed as a base material, and on the upper surface of the heat dissipating panel. A warm water circulation type floor heating device in which flooring is laid, a gas heat source device for heating, which includes a heat exchanger and a gas burner for heating the heat exchanger, and generates hot water at a predetermined temperature by passing water through the heat exchanger A plurality of heat collecting tubes are arranged in the casing, and the hot water is circulated between the solar collector that generates hot water by solar heat by passing through the heat collecting tubes, and the floor heating device and the gas heat source device. A first hot water circulation path, a second hot water circulation path for circulating hot water between the floor heating device and the solar collector, the first hot water circulation path, and the second hot water circulation path. Switching the flow path A floor heating device comprising: a mechanism and a control means for operating the flow path switching mechanism, and the floor heating of the floor heating device is a flooring having a heat storage function in which a latent heat storage material is accommodated on the back surface side. Exists in the system.

  According to the floor heating system of the present invention, the hot water obtained by the solar collector can be directly supplied to the floor heating device, and the latent heat storage material in the flooring can be stored, so that the heat source is gas from the solar collector. When switching to the heat source device, steady operation by the gas heat source device can be performed without performing hot dash operation, and as a result, the gas consumption can be further reduced and further energy saving can be achieved. In addition, after the operation by the solar heat collector, the temperature decrease of the flooring can be reduced by the heat stored in advance in the latent heat storage material of the flooring and the temperature of the flooring itself can be maintained uniformly, so the operation by the gas heat source device When switched to, it is possible to prevent an excessive rise in the temperature of the floor and variations in the temperature of the floor surface.

It is a flowchart which shows the main structures of the floor heating system which concerns on this invention. It is a figure which shows an example of the heat radiating panel of the floor heating apparatus used for the floor heating system which concerns on this invention, and is the top view which showed the inside except the surface heat radiating sheet. It is the AA fractured view in FIG. 2 which shows the structure of a thermal radiation panel, and the side view of a flooring. It is the perspective developed view which showed an example of the flooring of the floor heating apparatus used for a floor heating system from the back side. It is the partial top view which shows the other example of the flooring of a floor heating apparatus, and its BB fracture drawing. It is the partial top view which shows the other example of the flooring of a floor heating apparatus, and its BB fracture drawing. It is the partial top view which shows the other example of the flooring of a floor heating apparatus, and its BB fracture drawing. It is a flowchart which shows the outline | summary of the test system as an Example used for the performance evaluation test. It is a graph which shows the operation schedule of the floor heating in a performance evaluation test. It is a graph which shows the heating effect of the test system (example) of FIG. It is a graph which shows the heating effect of a conventional system (comparative example).

  An embodiment of a floor heating system according to the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment, unless the summary is exceeded.

  The floor heating system of the present invention is a system that uses a gas heat source device and a solar collector as heat sources. As shown in FIG. 1, a hot water circulation type floor heating device 1, a gas that generates hot water by gas combustion, A heat source device 5, a solar collector 4 for generating hot water by solar heat, two hot water circulation paths, a flow path switching mechanism for switching these hot water circulation paths, and a control means 9 for operating the flow path switching mechanism; Consists mainly of.

  As shown in FIGS. 2 and 3, the floor heating device 1 has a structure in which a heat radiating panel 2 in which a water pipe 22 is embedded is disposed as a base material, and a flooring 3 is laid on the upper surface of the heat radiating panel. Such a floor heating device 1 is preferably installed so as to have a laying area of 70% or more with respect to the living room area in order to sufficiently exhibit the heating effect. For example, in a general house, by setting the laying area to 70% or more, the room temperature easily enters a comfortable range of about 18 ° C. or more.

  The heat radiating panel 2 is arranged as a base material for the flooring 3 and is usually formed in a square shape (square or rectangular) from the viewpoint of workability. Since the heat radiation panel 2 corresponds to the dimension design of the living room floor, the length (width) of one side is usually about 500 to 4000 mm, the length (length) of the other side is about 500 to 4000 mm, and the thickness is set. It is set to about 7 to 20 mm. Note that a plurality of such heat dissipation panels 2 may be used depending on the size and shape of the floor to be laid.

  The heat dissipating panel 2 has a thin plate-like foamed resin molded body 21 as a heat insulating material, a water pipe 22 embedded in a groove formed on the front side of the foamed resin molded body, and the upper and lower surfaces of the foamed resin molded body 21. A plurality of joist-like members (small joists) 23 for fixing flooring embedded so as to be exposed, and a heat radiating sheet 24 for heat diffusion pasted on the front surface of the foamed resin molding 21 (see FIG. 3) In the heat radiating panel, a plurality of hot water circulation paths are constituted by a plurality of water pipes 22.

  The foamed resin molded body 21 is usually made of a hard polypropylene foam, a hard polyurethane foam, a polystyrene foam, or the like, and a small piece of a planar shape formed in a rectangular shape along the width of the heat dissipation panel 2 and the length of the heat dissipation panel 2. Many are arranged in the vertical direction. In the foamed resin molded body 21, the joist-like members 23 are arranged along the width of the heat radiating panel 2 at a predetermined interval. That is, the joist-like members 23 are arranged at predetermined intervals in parallel and parallel to the small pieces of the foamed resin molded body 21.

  The joist member 23 is a small member for fixing the heat radiating panel to the floor base with screws or nails and for supporting a vertical load applied to the flooring 3, and is made of a wood-based material or a hard resin foam material. Composed. The length and thickness of the joist member 23 are respectively designed according to the above-described width and thickness of the heat dissipation panel 2, and the joist member 23 has a width of about 40 to 50 mm from the viewpoint of workability. . Such joist-like members 23 are arranged along the width direction of the heat dissipation panel in a form divided at the center in the width direction of the heat dissipation panel 2 or in a form not reaching both ends of the heat dissipation panel 2 in the width direction, and , And arranged at a constant pitch in the length direction. The arrangement pitch of the joist-like members 23 is set to 300 to 305 mm corresponding to the general width standard of the flooring 3.

  The water conduit 22 is embedded in the foamed resin molded body 21 in contact with the heat radiating sheet 24 using a groove formed on the surface of the foamed resin molded body 21. As the water flow pipe 22, a cross-linked polyethylene pipe, a polybutene pipe, a polypropylene pipe, a polyethylene pipe, a copper pipe, a resin pipe with a metal wire embedded in the peripheral surface, and the like can be used. In order to keep the average temperature of the hot water flowing by reducing the pressure loss in the water conduit 22, the size of the water conduit 22 is normally 4 to 10 mm, preferably 5 to 8 mm, and the inner diameter is usually 5 to 8 mm. Is 4 to 7 mm, preferably 5 to 6 mm.

  As shown in FIG. 2, a header 26 for collecting and collecting hot water is attached to one edge portion of the heat radiating panel 2 in a notch formed as a header mounting portion. 26, a plurality of systems (for example, 6 systems) of hot water circulation paths are configured. As described above, by configuring a plurality of circulation paths, it is possible to reduce the temperature drop of the hot water in each system, dissipate heat uniformly throughout the panel, and increase the output.

The water flow pipes 22 are usually arranged in a straight line along the width direction of the heat radiating panel 2, both ends in the width direction, that is, the edges along the length direction of the heat radiating panel 2, and the width of the heat radiating panel 2. Arranged to be folded at the center. And in order to fully secure the installation length of the water flow pipe 22 per unit area of the heat radiating panel 2 and increase the heat radiation amount per unit area, the water flow pipe 22 per unit area when the heat radiating panel 2 is viewed in plan view. The total laying length is usually 12 to 30 m / m ² , preferably 15 to 27 m / m ² .

  Furthermore, it is preferable that the straight portion of the water flow pipe 22 is accommodated in a bowl-shaped heat transfer member 25 made of aluminum (or aluminum alloy) foil and embedded in the groove together with the heat transfer member. The heat transfer member 25 is a member in which a cross section perpendicular to the length direction is formed in a U-shape and a flange is attached to an upper end edge thereof. When the heat transfer member 25 as described above is arranged, the heat released from the water conduit 22 can be efficiently transmitted to the heat radiating sheet 24, and the upper surface heat radiating efficiency of the heat radiating panel 2 can be enhanced.

  On the surface of the heat radiating panel 2, that is, on the surfaces of the foamed resin molded body and the joist member 23, a heat radiating sheet 24 is attached to transmit the heat of the hot water in the water pipe 22 to the flooring 3 side. The heat radiating sheet 24 is a flexible film or sheet having a thickness of 60 to 150 μm, preferably 80 to 120 μm and excellent in thermal conductivity, for example, a metal foil such as aluminum foil, tin foil, copper foil, stainless steel foil, It is comprised from the metal woven fabric and nonwoven fabric, a resin film or a resin sheet, or the laminated sheet which combined these.

  The flooring 3 laid on the upper surface of the heat dissipating panel 2 is composed of various woody materials and used as a floor finishing material, like a general flooring. Such a flooring 3 is formed into an elongated rectangular plane shape, and has a length of about 900 to 2000 mm, a width of about 70 to 350 mm, and a thickness of about 6 to 15 mm. The edge of the flooring 3 is provided with an actual or jointed rowing portion that can be fitted to an adjacent flooring (not shown).

  In the present invention, as shown in FIG. 4, in order to effectively store solar heat obtained by the solar heat collector 4, a latent heat storage material (hereinafter referred to as “heat storage material”) is provided on the back side as the flooring 3 of the floor heating device 1. The flooring having a heat storage function in which 32 is accommodated is used.

  As said heat storage material 32, the heat storage material which consists of paraffin type heat storage material compositions, such as a paraffin gel which fixed the paraffin to the olefin type thermoplastic elastomer, is mentioned. The paraffin heat storage material composition is a composition comprising a paraffin compound (A) and a styrene elastomer (B).

  Examples of the paraffin compound (A) include aliphatic saturated hydrocarbons (alkanes), and those that are liquid or solid at room temperature are preferable from the viewpoints of safety and use temperature. Among these, by using a saturated hydrocarbon having 10 to 30 carbon atoms in the main chain, the phase transition temperature can be arbitrarily selected in a practical temperature range, and can be suitably used in a wide range of applications.

  Specific examples of linear saturated hydrocarbons (carbon number / melting point) include decane (10 / -30 ° C), undecane (11 / -26 ° C), dodecane (12 / -12 ° C), tridecane ( 13 / -5 ° C), tetradecane (14/6 ° C), pentadecane (15/10 ° C), hexadecane (16/18 ° C), heptadecane (17/21 ° C), octadecane (18/28) ° C), nonadecane (19/32 ° C), icosane (20/37 ° C), heikosan (21/41 ° C), docosan (22/44 ° C), tricosane (23/47 ° C), tetracosane ( 24/51 ° C), pentacosane (25/53 ° C), hexacosane (26/57 ° C), heptacosan (27/58 ° C), octacosane (28/62 ° C), nonacosan (29/64 ° C) ) Triacontane (30/66 ° C.), and the like. One of these may be used alone, or two or more of these may be used in combination. Moreover, you may use the branched saturated hydrocarbon which has a branched chain instead of a linear saturated hydrocarbon.

  The amount of latent heat at the phase transition of the paraffin compound (A) is preferably 120 J / g or more, more preferably 140 J / g or more, and particularly preferably 160 J / g or more. When the amount of latent heat of the paraffin compound (A) is within this range, excellent heat storage performance as a heat storage material can be exhibited even after blending with the styrene elastomer (B). The phase transition in the present invention means a phase transition from a liquid to a solid or from a solid to a liquid, and the phase transition temperature means a temperature at which the phase transition occurs. In addition, the amount of latent heat at the time of phase transition can be measured as the amount of heat of crystal melting when the temperature is increased from -40 to 100 ° C. at a heating rate of 10 ° C./min using a differential scanning calorimeter.

  Examples of the styrenic elastomer (B) include an elastomer composed of a hard segment made of polystyrene and a soft segment made of polybutadiene, polyisoprene, polyisobutylene, or a hydrogenated product thereof and / or a copolymer thereof. preferable.

  Specific examples of the styrene elastomer (B) include styrene-butadiene copolymer (SB), styrene-butadiene-styrene copolymer (SBS), styrene-isoprene copolymer (SI), and styrene-isoprene-styrene copolymer. Polymer (SIS), Styrene-isobutylene copolymer (SIB), Styrene-isobutylene-styrene copolymer (SIBS), Styrene-butadiene-butylene-styrene copolymer (SBBS), Styrene-ethylene-butylene-styrene copolymer Examples thereof include a polymer (SEBS), a styrene-ethylene-propylene-styrene copolymer (SEPS), and a styrene-ethylene-ethylene-propylene-styrene (SEEPS) copolymer. One of these may be used alone, or two or more of these may be used in combination. Moreover, these copolymers may be sufficient. Among these, it is particularly preferable to use a triblock copolymer such as SBS, SBBS, SIS, SEBS, SEPS, SEEPS, and SIBS from the viewpoint of shape retention.

  The styrene content of the styrene elastomer (B) is in the range of 20 to 60% by mass, preferably in the range of 22 to 58% by mass, and more preferably in the range of 25 to 55% by mass. When the styrene content of the styrene-based elastomer (B) is within this range, excellent shape retention can be imparted while maintaining fluidity during processing.

  Since a styrene elastomer contains a styrene block in its structure, it generally has a glass transition point near 100 ° C. Therefore, when the styrene content of the styrene elastomer (B) exceeds 60% by mass, the fluidity is remarkably lowered. On the other hand, when the styrene content is less than 20% by mass, it becomes difficult to fix the paraffin with the styrene block, and the shape retainability is significantly lowered.

  The number average molecular weight Mn of the styrene-based elastomer (B) is in the range of 50000 to 250,000 g / mol, preferably in the range of 60000 to 230,000 g / mol, and more preferably in the range of 70000 to 200000 g / mol. When the number average molecular weight Mn of the styrene elastomer (B) is within this range, excellent shape retention can be imparted while maintaining fluidity during processing.

  The molecular weight of the polymer compound is related to the entanglement of the polymer chains and thus greatly contributes to the shape retention and fluidity of the heat storage material composition. When the number average molecular weight Mn exceeds 250,000 g / mol, the paraffin is strongly bound in the polymer chain even if the melting point is exceeded, and the fluidity is remarkably lowered. On the other hand, when the number average molecular weight Mn is less than 50000 g / mol, it becomes difficult to fix the paraffin with the styrene block, and the shape retention is remarkably lowered.

  The mass ratio of the paraffin compound (A) and the styrene elastomer (B) contained in the paraffin-based heat storage material composition is preferably 98/2 to 70/30 mass%, and 95/5 to 75/25 mass%. It is more preferable that it is 90 / 10-80 / 20 mass%. If the mass ratio of the paraffin compound (A) and the styrene elastomer (B) is within this range, shape retention can be imparted while maintaining the latent heat amount and fluidity. Paraffin compounds (A) and styrene elastomers (B) are lubricants, antistatic agents, antioxidants, antiblocking agents, stabilizers, dyes and pigments as long as they do not affect the properties of the heat storage material. Various additives such as inorganic fine particles can be added.

  The amount of latent heat at the phase transition of the paraffin-based heat storage material composition is preferably 100 J / g or more, more preferably 120 J / g or more, and particularly preferably 140 J / g or more. If the amount of latent heat at the phase transition of the paraffin-based heat storage material composition is within this range, excellent heat storage performance as the heat storage material 32 can be exhibited.

  The paraffin-based heat storage material composition is preferably in the form of a so-called gel that does not flow to a certain temperature and maintains its shape even after the melting point is exceeded. Thereby, the leakage of paraffin can be prevented. The elastic modulus of the gel is preferably 0.1 kPa or more. If the elastic modulus of the gel is within this range, shape retainability can be imparted while maintaining processability.

  The paraffin-based heat storage material composition preferably flows sufficiently in the processing temperature range. Thereby, when using it in various shapes as a heat storage material, it becomes easy to process. The processing temperature is preferably in the range of 50 to 150 ° C, more preferably in the range of 60 to 140 ° C, particularly preferably in the range of 70 to 130 ° C, and most preferably in the range of 80 to 120 ° C. When the processing temperature of the paraffin-based heat storage material composition is less than 50 ° C., the styrene-based elastomer (B) is not sufficiently softened, and the fluidity may be lowered. On the other hand, when the processing temperature exceeds 150 ° C., it may be dangerous because it exceeds the flash point of the paraffin compound (A) or approaches the flash point. If the processing temperature of the paraffin-based heat storage material composition is within this range, sufficient fluidity can be expressed safely.

The viscosity of the paraffin-based heat storage material composition is usually 1 to 1 × 10 ⁷ Pa · s, preferably 5 to 1 × 10 ⁵ Pa · s under a temperature condition that is 15 ° C. higher than the melting point of the composition. It is preferably 1 × 10 ¹ to 1 × 10 ³ Pa · s. The reason for prescribing the viscosity of the paraffin-based heat storage material composition is as follows. That is, when the viscosity is less than 1 Pa · s, there arises a problem that the storage sheet covering the heat storage material 32 deteriorates or flows out when the sheet is accidentally damaged. Further, when the viscosity exceeds 1 × 10 ⁷ Pa · s, there is a problem that the heat conduction is deteriorated because the deformation is small and the adhesion with the surrounding members is low. In addition, the melting point of the heat storage material 32 is based on JIS K7121: 1987, and the extrapolated melting start temperature read from the DSC curve measured under the temperature rising condition of 10 ° C./min by DSC measurement (differential scanning calorimetry) To do. The extrapolated melting start temperature is the temperature at the intersection of a straight line obtained by extending the low-temperature base line to the high-temperature side and a tangent drawn at the point where the gradient is maximized on the low-temperature curve of the melting peak.

  As a method for forming the paraffin-based heat storage material composition, the components mixed together at the time of manufacturing the paraffin-based heat storage material composition are liquefied as they are or after slightly cooling and pouring into a mold, The method of making it plate-shaped is mentioned. In addition, since the paraffin-based heat storage material composition is solidified at a temperature lower than the melting point of the paraffin compound (A), the paraffin-based heat storage material composition can be formed into a block shape and then cut into a sheet shape or a plate shape. Furthermore, a shape can be imparted by applying or impregnating a paraffin-based heat storage material composition to a substrate such as a film or fiber. Moreover, it may be filled in a bag made of polyethylene or the like to give a shape during the cooling process. Furthermore, it can be extruded into a sheet or plate using an extruder.

  In the present invention, in order to accommodate the heat storage material 32 in the flooring 3, a plurality of shallow dish-shaped recesses 31 are provided in a fixed pattern on the back surface of the flooring 3 in plan view. The recesses 31 are formed in a substantially rectangular and thin shallow dish shape, and are equally provided at 6 to 18 locations in the case of the flooring 3 having the above-mentioned dimensional specifications. For example, two rows in the width direction of the flooring 3 and six rows in the length direction of the flooring 3 are arranged at a constant pitch. In the case of the flooring 3 designed to have a length of 1818 mm, a width of 303 mm, and a thickness of 12 mm, the width of the recess 31 parallel to the width direction of the flooring 3 is set to about 80 to 120 mm. The length of the parallel recessed part 31 is set to about 230-270 mm. Thereby, the vertical load applied to the surface of the flooring 3 can be supported by the wood portion between the recesses 31.

  In order to secure the strength of the thickness portion corresponding to the concave portion 31 of the flooring 3, the depth of the concave portion 31 is set within a range of 2/3 or less of the thickness of the flooring 3. Specifically, in the case of the flooring 3 having the dimensional specifications described above, the depth of the recess 31 is about 4 to 8 mm. Furthermore, a rib 34 that reinforces the thickness portion of the flooring 3 may be disposed in each recess 31. The rib 34 is disposed in the central portion of the concave portion 31 over the length direction of the concave portion, and the length thereof may be such a length that both ends do not reach the edge of the concave portion 31. The length reaching the edge may be used, but the length reaching the edge is preferable from the viewpoint of compressive strength. The height of the rib portion 34 is formed to be lower than the depth of the concave portion 31 when viewed from the back surface of the flooring. For example, the length of the rib 34 is about 50 to 100% of the length of the recess 31, and the height of the rib 34 is about 20 to 50% of the depth of the recess 31. As described above, in each recess 31, the length of the rib 34 is set shorter than or equal to the length of the recess 31, and the height of the rib 34 is set lower than the depth of the recess 31. Thereby, the fluidity | liquidity in the recessed part 31 at the time of the heat storage material 32 sol-izing can be ensured, adhesiveness with the flooring 3 can be improved, and the reinforcement effect can be improved more.

  In a preferred embodiment, the rib 34 in each recess 31 is formed integrally with the flooring 3. That is, the rib 34 is preferably formed as a part of the wood portion of the flooring 3. Since the ribs 34 are formed integrally with the flooring 3, durability can be improved and manufacturing costs can be reduced. In addition, the recessed part 31 and the rib 34 can be normally formed by the cutting process by a router processing machine or a grooved processing machine.

  The heat storage material 32 is usually fitted in each of the recesses 31 in a state of being wrapped with a sheet or a film (hereinafter referred to as “sheet”). The structure in which the heat storage material 32 is disposed in the recess 31 is a state in which the heat storage material 32 is sandwiched between the underlay sheet disposed on the wooden surface side of each recess 31 and the back sheet adhered to the open portion side of each recess 31. In addition to the structure arranged in each recess 31, for example, as shown in FIG. 4, a structure in which a heat storage sheet 3 </ b> S formed by connecting a plurality of bags 33 enclosing a heat storage material 32 is attached to the back surface of the flooring 3 may be used. . Further, the heat storage sheet 3S may be configured as one sheet in which the bags 33 of the heat storage material 32 are continuous in length and width, or two sheets in which the bags 33 of the heat storage material 32 are continuous in one row are used. May be. The heat storage sheet 3S is formed by superposing at least two sheets and sealing the heat storage material 32 formed in a predetermined shape by sandwiching between the sheets, or by superposing at least two sheets and A plurality of pockets are formed, and the heat storage material 32 is received and sealed in these pockets.

  As the sheet constituting the heat storage sheet 3S, a resin sheet having a thickness of about 0.05 to 1 mm, a metal sheet, a resin / resin laminate sheet, or a resin / metal laminate sheet is used. Examples of the resin constituting the sheet include polyurethane elastomer, polyester, polyamide, polyurethane, polycarbonate, and polyethylene. Examples of the metal constituting the sheet include aluminum and copper. Aluminum is preferable from the viewpoint of low cost. . In addition, although FIGS. 5-7 shows the other aspect of the thermal storage material mentioned later, in these aspects, for example, the thermal storage sheet 3S includes a resin sheet 33a disposed on the wood surface side of the recess 31. A laminated sheet 33b that seals the open side of the recess 31, a bag 33 formed between the sheets, and a heat storage material 32b (32c, 32d) enclosed in each bag 33, and a laminated sheet As 33b, a laminated sheet of aluminum / PET / hot melt resin is used.

  The heat storage material 32 is filled in a dish-shaped mold in a molten state and cooled, or formed into a sheet shape and cut into a strip shape after cooling, whereby a sheet shape having a size that can be accommodated in the concave portion 31. It is formed into a (flat rectangular parallelepiped). From the viewpoint of increasing the amount of stored heat, it is preferable to increase the volume of the heat storage material 32 as much as possible. However, when the flooring 3 is constructed with a hot melt adhesive, the heat storage material 32 also rises in temperature and expands. Therefore, from the viewpoint of preventing protrusion from the recess 31 due to expansion during construction, the heat storage material 32 is formed such that its volume is 80 to 95% with respect to the internal volume of the recess 31.

  Further, in the present invention, in order to sufficiently store the heat obtained by the solar collector 4 described later, it is preferable that a larger amount of the heat storage material 32 is built in the flooring 3, but the heat storage material 32 is used. As the volume of the concave portion 31 for accommodating is increased, the thickness of the wood portion corresponding to the concave portion 31 is reduced, resulting in a problem that the strength is reduced. Therefore, in place of the structure of the rib 34 and the gel-like heat storage material 32, heat storage materials 32b, 32c, and 32d as shown in FIGS. 5 to 7 can be used.

In the flooring 3 shown in FIG. 5, a plurality of substantially square shallow dish-shaped recesses 31 are provided in a fixed pattern in plan view. Such a recess 31 has a side length of about 230 to 270 mm, and is provided, for example, in six rows and one row in the case of the flooring 3 having the above dimensional specifications. In the flooring 3, the heat storage material 32 b is enclosed in the heat storage sheet 3 </ b> S, and the heat storage material 32 b has a substantially square shape whose one side is slightly shorter than one side of the recess 31 and has a thickness somewhat larger than the depth of the recess 31. A thin insulation board is impregnated with the aforementioned gel-like heat storage material. The insulation board is a soft fiber board having a density of less than 0.35 g / cm ³ formed from fibers obtained from waste wood or the like. By using such a heat storage material 32b, the reinforcing effect of the flooring is easily improved, which is preferable.

  In the flooring 3 shown in FIG. 6, a plurality of substantially rectangular shallow dish-shaped recesses 31 are provided in a fixed pattern in plan view. Such a recess 31 is the same as that shown in FIG. In such a flooring 3, the heat storage material 32c is enclosed in the heat storage sheet 3S, and the heat storage material 32c is configured by pouring the gel-like heat storage material into a net-like reinforcing body made of a resin such as polyethylene. The mesh size of the mesh reinforcement is about 10 × 10 to 50 × 50 mm. Use of such a heat storage material 32c is preferable because the reinforcing effect of the flooring is easily improved.

  Further, in the flooring 3 shown in FIG. 7, a plurality of substantially rectangular shallow dish-shaped recesses 31 are provided in a fixed pattern in plan view. Such a recess 31 is the same as that shown in FIG. In such a flooring 3, a heat storage material 32d is sealed in the heat storage sheet 3S, and the heat storage material 32d is a columnar reinforcing material disposed in the center of the gel-like heat storage material, The above-mentioned gel heat storage material is impregnated into an insulation board whose section is formed in an elliptical column shape and whose height is somewhat lower than the depth of the recess 31. The major axis of the columnar reinforcing material is about 30 to 100 mm, and the minor axis is about 10 to 50 mm. Use of such a heat storage material 32d is preferable because the reinforcing effect of the flooring is easily improved.

By using the heat storage materials 32b, 32c, and 32d as shown in FIGS. 5 to 7, the necessary load bearing performance of the flooring 3 can be ensured and the heat storage capacity can be increased. And in order to fully store the heat obtained by the solar collector 4 described later and to reduce the temperature drop of the flooring 3 after the hot water supply from the solar collector 4 is stopped, the heat storage material 32 ( 32b, 32c, and 32d) are set such that the latent heat storage capacity is 90 Wh / m ² or more, preferably 100 Wh / m ² or more.

The reason for defining the latent heat storage capacity of the flooring 3 to 90 Wh / m ² or more is as follows. That is, when a performance evaluation test in a laboratory simulating an actual house was performed, when the latent heat storage capacity of the flooring 3 was 84 Wh / · or less, the heat storage effect was not sufficiently exhibited, and floor heating by the gas heat source device 5 was performed. When switching, hot dash operation is required, and the effect of reducing gas consumption cannot be obtained sufficiently. On the other hand, when the latent heat storage capacity of the flooring 3 is 90 Wh / · or more, since a decrease in room temperature can be suppressed by the heat dissipation effect by the heat storage material 32, hot dash operation is performed when switching to floor heating by the gas heat source device 5. As a result, it was confirmed that the gas consumption in the gas heat source device 5 can be reduced. Specific test contents will be described later.

  The heat storage sheet 3 </ b> S as described above is attached to the back surface of the flooring 3 in a state in which each bag 33 is fitted in the recess 31. That is, the heat storage sheet 3S is fixed to the back surface of the flooring 3 by sticking the outer peripheral portion of each bag 33 of the heat storage sheet to the wood portion around the recess 31 with an adhesive such as urethane-based moisture-curing melt adhesive. Is done. Thereby, the heat storage material 32 (32b, 32c, 32d) can be integrated with the flooring 3. In addition, in the construction of the flooring 3, after applying the adhesive to the joist member 23 of the heat dissipation panel 2 that is the base material and arranging the flooring 3, the real part is fixed with a nail, whereby the heat dissipation panel 2 is fixed. Although the flooring 3 is bonded, in the heat storage sheet 3S described above, a hole that exposes the wood portion between the adjacent recesses 31 is provided in the sheet-like connecting portion between the adjacent bags 33, thereby providing a base material. Adhesive strength against can be increased.

  The floor heating device 1 is configured by disposing a heat radiation panel 2 on a floor base and laying a flooring 3 on an upper surface. And after laying the flooring 3, it connects with the solar heat collector 4 which is a heat source device, and the gas heat source device 5 by the flow paths 61-69 mentioned later.

  In the present invention, the gas heat source device 5 may be either a combined gas heat source device equipped with a hot water supply gas burner and a heating gas burner, or a gas heat source device dedicated to heating. The gas heat source device 5 illustrated in FIG. 1 is a composite gas heat source device, and heat exchanger 51 for hot water supply and a gas burner 52 for heating the heat exchanger 51, and heat exchanger 53 for heating and the heater are heated. A gas burner 54 is provided, and water is passed through the heat exchangers 51 and 53 to generate hot water at a predetermined temperature.

  In the gas heat source device 5, the heat exchanger 51 for hot water supply is connected to a flow path 83 for supplying water to the heat exchanger and a flow path 84 for supplying generated hot water to a required hot water supply place. Has been. The flow path 83 is a pipeline that supplies water (low temperature hot water) to the heat exchanger 51 from a hot water storage tank (not shown) that stores part of solar heat obtained by the solar collector 4 described later. The heat exchanger 51 includes a main heat exchanger (lower heat exchanger) that mainly uses sensible heat from combustion exhaust gas, and a sub heat exchanger (upper heat exchanger) that mainly uses latent heat from combustion exhaust gas. In the heat exchanger 51, hot water having a predetermined temperature is generated by heating with the gas burner 52. Usually, the maximum combustion amount of the gas burner 52 for hot water supply is about 30 kW.

  On the other hand, in the heat exchanger 53 for heating, a flow path 64 for introducing water to be circulated to the floor heating apparatus 1 and a flow path 65 for supplying hot water to the floor heating apparatus 1 (outward pipe of the floor heating apparatus 1) Is connected. In addition, a pump 55 for circulating hot water to and from the floor heating device 1 is disposed in the flow path 64 as an accessory device of the gas heat source device 5. The heat exchanger 53 includes a main heat exchanger (lower heat exchanger) that mainly uses sensible heat from combustion exhaust gas, and a sub heat exchanger (upper heat exchanger) that mainly uses latent heat from combustion exhaust gas. In the heat exchanger 53, when the temperature of the introduced water is lower than the set temperature for heating, hot water having a predetermined temperature is generated by heating the gas burner 54. Usually, the maximum combustion amount of the gas burner 53 for heating is about 14 kW.

  In the gas heat source device 5, the hot water supply gas burner 52 and the heating gas burner 54 are each divided into a plurality of burners in order to switch the output, and each individual burner is operated by operating the electromagnetic valve. Gas supply / cutoff is controlled, and the gas flow rate is adjusted by a proportional valve. The flow paths 84 and 64 are provided with sensors (not shown) for detecting the temperature of hot water supplied from the heat exchangers 51 and 53, respectively. In the gas heat source device 5, in order to adjust the temperature of the generated hot water, each solenoid valve, proportional valve, and fan for supplying combustion air are operated to control the combustion amount of the gas burners 52 and 54. A device (not shown) is attached.

  In this invention, as shown in FIG. 1, the solar collector 4 is used as one of the heat sources which supply warm water to the floor heating panel of said floor heating apparatus 1. As shown in FIG. The solar collector 4 is a device that collects heat by flowing a fluid through a plurality of heat collecting tubes arranged in a casing and heating the fluid with solar heat. In the case of a flat plate solar collector, It is installed on a rooftop, a veranda or the like, and is configured to generate hot water by forcibly circulating water as a fluid, for example, with a pump.

  Specifically, the solar heat collector 4 includes a casing formed in a flat box shape and covered with a sealing plate whose upper surface is transparent, and a sheet-like heat insulating material disposed on the bottom side in the casing. And a plurality of heat collecting tubes arranged on the front side of the heat insulating material through a space for heat storage between the sealing plate and the sealing plate. The outer shell portion of the casing is usually configured in a box shape with an upper end opened by a steel plate or an aluminum alloy plate. The casing is generally formed in a flat rectangular parallelepiped shape. For example, when the casing is configured as a flat rectangular parallelepiped having a rectangular planar shape, the length of one side of the casing is about 150 to 5000 mm, and the height (thickness) of the casing is about 30 to 100 mm. The upper surface of the casing is sealed with a sealing plate made of transparent glass or transparent resin. In order to facilitate maintenance management, the sealing plate is attached to the casing so as to be openable and closable using a hinge or the like.

  A sheet-like heat insulating material having a thickness of about 6 to 70 mm formed by molding glass wool or the like is disposed at the bottom of the casing. A plurality of heat collecting tubes are arranged on the front side of the heat insulating material, and these heat collecting tubes are connected to, for example, a pair of headers arranged to face each other in the casing. That is, in the heat collector, when the heat collector is disposed on, for example, an inclined roof, the flow path configuration is such that the fluid supplied to the lower header passes through each heat collector tube and is taken out from the upper header. Is done. In addition, about arrangement | positioning of a header and a heat collecting tube, various arrangement | positioning is employable from a viewpoint of the workability | operativity of a heat collector, and heat collection efficiency. For example, although not shown, two headers, that is, an inlet header and an outlet header of the fluid are arranged in the same row near one inner surface in the casing, and the plurality of heat collecting tubes meander or bend on the heat insulating material. And both ends thereof may be connected to each header.

  As the heat collecting tube, an aluminum or copper tube is usually used. In order to reduce the weight and reduce the cost, the heat collecting tube may be made of a polyolefin-based resin such as cross-linked polyethylene, polybutene, polypropylene, or polyethylene. The heat collection tube is designed to have an outer diameter of about 3 to 16 mm and an inner diameter of about 2 to 13 mm. The heat collecting tube is housed in a metal heat transfer member and arranged in a state where a part of the heat collecting tube is embedded on the front side of the heat insulating material in order to efficiently transfer heat collected through a heat collecting sheet described later to the fluid. The The metal heat transfer member is made of an aluminum alloy or the like and has a U-shaped cross section perpendicular to the length direction of the heat dissipation panel 2 of the floor heating device 1 described above, and the upper end has a ridge. This is a bowl-shaped member that has been taken out. And the heat collecting sheet which consists of an aluminum sheet and a steel plate is arrange | positioned at the upper surface side of a heat insulating material.

  In the floor heating system of the present invention, in order to perform heating by gas combustion heat and heating by solar heat, a first hot water circulation path for circulating hot water between the floor heating device 1 and the gas heat source device 5, and the floor heating device 2 and a second hot water circulation path for circulating hot water between the solar collector 4 and the solar collector 4.

  The first hot water circulation path is three-way switching from the outlet of the heat exchanger 53 of the gas heat source device 5 to the header 26 inlet of the heat radiating panel 2 of the floor heating device 1 and the header 26 outlet. A flow path 66 leading to the valve 92, a flow path 69 connecting the three-way switching valve 92 and the three-way switching valve 91, a flow path 63 extending from the three-way switching valve 91 to the pump 55 of the gas heat source device 5, and the heat exchange from the pump 55. It comprises a flow path 64 in the gas heat source device 5 leading to the inlet of the vessel 53. The flow paths 65 and 66 are so-called pair tubes composed of a pair of forward and return pipes.

  The second hot water circulation path includes the flow path 61 from the outlet header of the solar collector 4 to the three-way switching valve 93, the flow path 62 from the three-way switching valve 93 to the three-way switching valve 91, The heat flows through the flow path 63 from the three-way switching valve 91 to the pump 55 of the gas heat source device 5, the flow path 64 in the gas heat source device 5 from the pump 55 to the inlet of the heat exchanger 53, and the heat exchanger 53. A flow path 65 connected from the outlet of the exchanger to the header 26 inlet of the heat dissipating panel 2 of the floor heating device 1, a flow path 66 extending from the header 26 outlet to the three-way switching valve 92, and the three-way switching valve 92 and the three-way switching valve 94 are connected. And a flow path 68 connected from the three-way switching valve 94 to the inlet header of the solar collector 4. When the second hot water circulation path is used, only the pump 55 of the gas heat source device 5 is operated and the heating burner 54 is not used, and the hot water obtained by the solar collector 4 is used as the gas heat source device. 5 is passed through the heat exchanger 53.

  The three-way switching valves 91 and 92 are provided as a flow path switching mechanism that switches between the first hot water circulation path and the second hot water circulation path. That is, the operation of the three-way switching valves 91 and 92 forms a first hot water circulation path, and in the first hot water circulation path, hot water having a predetermined temperature generated by the gas heat source device 5 passes through the flow path 65. The hot water that has been supplied to the floor heating device 1 and has been used for heating in the floor heating device 1 is the flow path 66, the three-way switching valve 92, the flow path 69, the three-way switching valve 91, the flow path 63, and the gas heat source. The apparatus 5 is configured to be returned to the gas heat source apparatus through the pump 55 and the flow path 64 of the apparatus 5.

  In addition, the switching operation of the three-way switching valves 91 and 92 configures the second hot water circulation path, and in the second hot water circulation path, hot water having a predetermined temperature generated by the solar heat collector 4 flows. 61, the three-way switching valve 93, the flow path 62, the three-way switching valve 91, the flow path 63, the pump 55 of the gas heat source apparatus 5, the flow path 64, the heat exchanger 53 of the gas heat source apparatus 5, and the flow path 65. To the solar collector 4 through the flow path 66, the three-way switching valve 92, the flow path 67, the three-way switching valve 94, and the flow path 68. Configured to be. A three-way switching valve 93 interposed between the flow path 61 and the flow path 62 from the solar collector 4 and a three-way interposed between the flow path 67 and the flow path 68 leading to the solar collector 4. The switching valve 94 is a switching valve for circulating such hot water to a heat exchanger (not shown) in a hot water storage tank when hot water obtained by the solar collector 4 is not used in the floor heating device 1. Yes, the flow path 81 extends from the solar heat collector 4 to the hot water storage tank, and the flow path 82 returns from the hot water storage tank to the solar heat collector 4.

  The operation of the flow path switching mechanism, that is, the operation of the three-way switching valves 91 and 92 is configured to be performed by the control means 9. The control means 9 is composed of a microcomputer and a circuit that outputs an operation signal, a function for starting / stopping the operation based on the reservation setting for the operation time, and the three-way switching valve 91 when the operation of the floor heating device 1 is started. It has a function of selecting the heat source by performing operations 92, 93, 94, and a function of outputting a signal to the combustion control device of the gas heat source device 5 as necessary.

  Specifically, in the floor heating system of the present invention, for example, sunlight is obtained based on a signal from a sensor (not shown) that detects the water temperature obtained by the solar collector 4 by the control by the control means 9. When the water temperature obtained by the solar collector 4 is 40 ° C. or higher during the day, the hot water is circulated between the solar collector 4 and the floor heating device 1 using the second hot water circulation path. Let the floor heating. In addition, when the water temperature obtained by the solar collector 4 is less than 40 ° C. at night or the like, the gas heat source device 5 is operated using the first hot water circulation path, and the gas heat source device 5 and the floor Floor heating is performed by circulating hot water between the heating device 1 and the heating device 1. In addition, when the operation of the floor heating apparatus 1 is stopped, such as in summer when floor heating is not used, the solar collector 4 is switched to a hot water storage tank as in the conventional case by switching the three-way switching valves 93 and 94. Of hot water can be circulated.

  By the way, in the floor heating system of this invention, the flooring 3 of the floor heating apparatus 1 has a heat storage function, and even after performing the floor heating by the solar collector 4 during the daytime, the heat storage material 32 of the flooring 3. Since the heat stored in is gradually dissipated, the indoor heating effect can be maintained for a long time. Therefore, when switching to floor heating by the gas heat source device 5 at night, the operation of the gas heat source device 5 can be started after a predetermined time after the floor heating by the solar collector 4 is finished. Specifically, the setting function of the control means 9 described above may be configured so as to switch after a waiting time of 0 to 200 minutes when switching from the second hot water circulation path to the first hot water circulation path. Good. With such an operation function, it is not necessary to perform a conventional hot dash operation, and a steady operation by the gas heat source device 5 can be performed.

  As described above, in the floor heating system of the present invention, the hot water obtained by the solar collector 4 is directly supplied to the floor heating device 1 for floor heating, so that the gas consumption can be further reduced. That is, in the conventional floor heating system using both the gas heat source device and the solar collector, the heat obtained by the solar collector is circulated exclusively to the hot water storage tank. In the floor heating system, the heat obtained by the solar collector 4 is immediately supplied to the floor heating device 1, so that there is little heat loss and the gas consumption in the gas heat source device 5 can be reduced accordingly.

  Moreover, in the floor heating system of this invention, since the hot water obtained with the solar collector 4 can be directly supplied to the floor heating apparatus 1, and the heat storage material 32 in the flooring 3 of the floor heating apparatus 1 can store heat, When the heat source is switched from the solar heat collector 4 to the gas heat source device 5, a steady operation by the gas heat source device 5 can be performed without performing a hot dash operation. As a result, the gas consumption can be further reduced, and further energy saving can be achieved. Moreover, after the operation by the solar heat collector 4, the temperature decrease of the flooring can be reduced by the heat stored in the heat storage material of the flooring 3 in advance, and the temperature of the flooring 3 itself can be maintained uniformly. When the operation is switched to the operation according to 5, it is possible to prevent an excessive rise in the temperature of the floor and a variation in the temperature of the floor surface.

  As a performance evaluation of the floor heating system of the present invention, a performance evaluation test is performed on the floor heating apparatus 1 in which the flooring 3 in which the heat storage material 32 is accommodated is laid on the upper surface of the heat radiating panel 2 under the conditions assuming actual operation. It was. The flooring 3 has an outside dimension of 1818 (length) × 303 (width) × 12 (thickness) mm, a melting point of the heat storage material 32 of 26 ° C., and a heat storage amount of the heat storage material 32 of about 55 Wh / one flooring. It can be constructed in the same manner as general floor heating flooring. The heat storage material 32 is gelled in a plate shape, enclosed in a bag 33, and incorporated in the concave portion 31 on the back surface of the flooring in the state of the heat storage sheet 3S. Repeat heat storage and heat dissipation.

  That is, in the floor heating system, the solar collector 4 and the floor heating apparatus 1 perform indoor heating while accumulating solar heat during the daytime, and gradually dissipate the latent heat of the heat storage material 32 even after heating is stopped. Function. After stopping the operation by the solar heat collector 4, heating by the gas heat source device 5 can be started within a few hours, thereby contributing to the reduction of primary energy. The operation time can be shortened.

  In the performance evaluation test, as shown in FIG. 8, the floor heating device 1 is laid in an environmental test room (12 tatami mats), and a constant temperature at which the amount of heat can be arbitrarily changed as a heat source (pseudo solar heat) instead of the solar collector 4. A test system comprising a water generator 4s was used. In such a test system, a three-way switching valve is installed in the circulation path from the gas heat source device 5 and the constant temperature water generator 4s (pseudo solar heat), and the heating heat source is set to [gas heat source device 5] 恒 [constant temperature water generation] at a set time. It is a system that can be switched to the apparatus 4s]. The test environment and test conditions in the performance evaluation test are as shown in Table 1, and the main measurement items are as shown in Table 2.

  The outline of the test is as follows. The daily driving schedule was set as shown in FIG. The heating time is 9 hours a day based on the ECCJ Energy Saving Center “Energy Saving Dictionary of Homes (2012)”, and the morning and evening heating times are 3 hours (6:00 to 9:00) and 6 hours (17: 00 to 23:00).

  As an example of the test system, the constant temperature water generator 4s (pseudo solar heat) can be used for a maximum of 4 hours in the daytime (11: 00 to 15:00), and the circulating temperature and hot water passing time are changed during operation and stopped. While confirming how the subsequent indoor temperature / floor temperature change affects the subsequent gas warm water floor heating start-up performance, the heat storage effect after the heating stop by the gas heat source device 5 was also evaluated. In addition, as a comparative example, the floor heating of the conventional method (method not using solar heat) was tested under the same conditions, and the indoor thermal environment and the primary energy consumption were compared. The control method uses the floor heating remote control control function, and in the test system, only the duty control is performed without the hot dash operation, and in the conventional system as a comparative example, the control shifts to the duty control after the hot dash operation for 30 minutes. . The duty control is a function to control the difference between the room temperature and the set room temperature quickly. The difference between the room temperature and the set room temperature is used to control the water temperature time of 60 ° C. or the 40 ° C. setting. This is a control method in which the difference between the room temperature and the set room temperature is reduced by varying the water temperature time.

  Table 3 and FIG. 10 show the operation results of the test system (40 ° C. hot water circulation, 2 hour operation by the constant temperature water generator 4s (pseudo solar heat)). The operation results of the conventional system to be compared are shown in Table 3 and FIG.

  As shown in Table 3, FIG. 10, and FIG. 11, when the heating operation was performed for 3 hours in the morning and 6 hours in the evening set as the heating operation time zone, the heat storage effect was exhibited in the test system (Example). As a result, the average room temperature at the heating end set time (9:00, 23:00) may be about the same as that of the conventional system even when 30 minutes in the morning and 1 hour in the evening are shortened compared to the conventional system (comparative example). It could be confirmed. In addition, as a result of confirming the gas consumption, in the test system (Example), the heat of the circulating hot water is stored in the heat storage material in the morning, but it increases by about 8%. Heating_Gas consumption at the beginning of night operation was suppressed, and the daily gas consumption was reduced by about 17%.

  Table 4 shows the consumption ratio when the gas consumption of the conventional system is set to 100 when the solar heat utilization time and the circulation temperature are changed. In the test system, it was confirmed that there was no significant increase even in the cloudy weather when the solar heat was stopped, and the effect of reducing the floor heating gas consumption in winter by about 10% was expected.

  As is clear from the performance evaluation test described above, according to the heating system of the present invention, the loss caused by heat storage does not lead to an increase in gas consumption even on days when solar heat recovery is not expected, such as cloudy weather. On the other hand, in winter, the gas consumption can be reduced by about 10% by reducing hot dash operation.

DESCRIPTION OF SYMBOLS 1: Floor heating apparatus 2: Radiation panel 21: Foamed resin molding 22: Water flow pipe 23: joist member 24: Heat radiation sheet 25: Heat transfer member 26: Header 3: Flooring 31: Recess 32: Heat storage material 32b-32d: Thermal storage material 33: Bag 34: Rib 3S: Thermal storage sheet 33a: Resin sheet 33b: Laminated sheet 4: Solar collector 4s: Constant temperature water generator (pseudo solar heat of test system)
5: Gas heat source device 51: Heat exchanger for hot water supply 52: Burner for hot water supply 53: Heat exchanger for heating 54: Burner for heating 55: Pump 61-64: Channel 65: Channel (outward pipe)
66: Flow path (return pipe)
67, 68: flow path 81, 82: flow path 9: control means 91, 92: three-way switching valve (flow path switching mechanism)
93, 94: Three-way switching valve

Claims (10)

  A hot water circulation floor heating system that uses both a gas heat source device and a solar collector. A floor heating device, a heat exchanger and a gas heat source device for generating hot water at a predetermined temperature by passing water through the heat exchanger, and a plurality of heat collecting tubes arranged in a casing A solar collector that passes through the heat collecting pipe and generates hot water by solar heat, a first hot water circulation path for circulating hot water between the floor heating device and the gas heat source device, and the floor heating A second hot water circulation path for circulating hot water between the apparatus and the solar collector, a flow path switching mechanism for switching between the first hot water circulation path and the second hot water circulation path, and the flow path switching Operate mechanism And a that control means, and, flooring the floor heating device, floor heating system, which is a flooring having the heat storage function of the latent heat storage material is housed on the back side.   The floor heating system according to claim 1, wherein the control means has a function of switching with a waiting time of 0 to 200 minutes when switching from the second hot water circulation path to the first hot water circulation path. The floor heating system according to claim 1 or 2, wherein the latent heat storage capacity of the latent heat storage material for flooring is 90 Wh / m ² or more.   The floor heating system according to any one of claims 1 to 3, wherein a floor heating device has a laying area of 70% or more with respect to a living room area.   The floor heating of the floor heating device is configured by a plurality of shallow dish-like recesses provided in a fixed pattern on the back surface of the flooring in plan view, and a gel-like latent heat storage material is fitted in each of the recesses, and The floor heating system according to any one of claims 1 to 4, wherein a rib for reinforcing a thickness portion of the flooring is disposed in the recess.   The floor heating system according to claim 5, wherein the rib of each recess is formed integrally with the flooring.   It is a flooring of the floor heating apparatus used for the floor heating system according to any one of claims 1 to 4, wherein a plurality of shallow dish-shaped recesses are provided in a fixed pattern on the back surface of the flooring in a plan view, A flooring in which a shape-like latent heat storage material is fitted into each of the recesses, and ribs for reinforcing the thickness of the flooring are disposed in the recesses.   The flooring according to claim 7, wherein the rib of each recess is formed integrally with the flooring.   It is a flooring of the floor heating apparatus used for the floor heating system according to any one of claims 1 to 4, wherein a plurality of shallow dish-shaped recesses are provided in a fixed pattern on the back surface of the flooring in a plan view, A flooring in which a latent heat storage material including an insulation board impregnated with a heat storage material is fitted into each of the recesses.   A flooring of the floor heating apparatus used in the floor heating system according to any one of claims 1 to 4, wherein a plurality of shallow dish-shaped recesses are provided in a fixed pattern on a back surface of the flooring in a plan view, A flooring in which a latent heat storage material in which a reinforcing body is incorporated is fitted in each of the recesses.

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