JP2013217561A - Building with floor heating, and floor heating construction method for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further improve floor heating that uses heat accumulated in the soil, as a heat source.SOLUTION: A building K includes a heat insulating body 107 disposed on foundation projections KT raised from foundation concrete KC constructed to cover soil D, and further includes a plurality of electric resistance heating panels 102 on a surface of the constructed foundation concrete KC for each of underfloor regions of the building surrounded by the foundation projecting sections KT. The electric resistance heating panels 102 are covered by a concrete layer 105 while securing a clearance gap T with a lower face of a building floor 150. Heat is generated by midnight power service in an electricity contract time zone based on a contract to receive midnight power service, to keep the soil D in a heat accumulating state.

Description

  The present invention relates to a floor heating building, and more particularly to a building and a floor heating construction method for floor heating using heat stored in soil as a heat source.

  The following publications are known as buildings for floor heating using heat stored in the soil as a heat source.

Japanese Patent No. 3049536 Japanese Patent No. 4694168

  The floor heating shown in these patent documents is epoch-making in that the heat source is greatly different from that before that, and the heat source is the heat stored in the soil. Therefore, there is still a lot of room for improvement in the construction method and the heating element arrangement.

  In view of the above-described problems, an object of the present invention is to further improve floor heating using heat stored in soil as a heat source.

  In order to achieve at least a part of the above object, the present invention can be implemented as the following modes.

  (1) As one form of this invention, it is a building which aims at floor heating using the heat stored in the soil as a heat source, rises from the foundation concrete that has already been constructed so as to cover the soil, and serves as a foundation for the foundation of the building A heat insulator that is attached to a convex portion and that insulates the area under the building floor surrounded by the foundation convex portion, and is installed on the surface of the foundation concrete for each area under the building floor, and is placed on the soil under the foundation concrete. A plurality of heating elements that apply heat through the foundation concrete to store the soil in a heat storage state, and a plurality of the heating elements for each of the building underfloor areas, and a lower surface of the building floor for each of the building underfloor areas And a control unit that controls heating of the heating element using the midnight power in a power contract time period based on a contract for receiving energization of midnight power.

  In this form of building, a plurality of heating elements to make the soil heat-storing state are raised from foundation concrete that has already been constructed so as to cover the soil, and are surrounded by foundation protrusions that serve as the foundation of the building Install in each underfloor area. Multiple heating elements for each area under the building floor are covered with a surface layer with a gap between the lower surface of the building floor, subjected to heating control by the control means, and based on a contract to receive energization of midnight power Heat is generated by the midnight power during the power contract time. This heat heats the surface layer covering the heating element and the foundation concrete on which the heating element is installed, and is also transmitted to the soil under the foundation concrete, so that the soil is in a heat storage state. And since the building underfloor area | region is insulated by the heat insulating body with which the foundation convex part surrounding this was mounted | worn, the heat which warmed the surface layer part can be kept in a building underfloor area | region. The heat stored in the soil in this way and the heat that warms the surface layer and foundation concrete are radiated to the gap between the surface of the surface layer and the lower surface of the building floor to warm the building floor and to heat the building floor. Can be planned. As a result, according to the building of the above form, the building in which the foundation concrete has already been constructed, for example, the building to be reformed, or the building where the building roof is completely destroyed by natural disaster and the foundation concrete remains. Enables floor heating of objects.

  (2) In the building of the above-described form, when the late-night power supply based on the contract is stopped, the heating element can be controlled to be heated using the power from the self-power generating device. In this way, floor heating can be achieved even in the situation where power supply is stopped late at night due to natural disasters or the like. Examples of such self-power generating devices include a generator using an internal combustion engine, a solar power generator that converts energy caused by a natural phenomenon that occurs in nature into electric energy, a wind power generator, and the like.

  (3) In the building of any one of the above forms, the heating element for each under-floor area of the building can be controlled to be heated so that the heat generation capacity increases as the thickness of the foundation concrete increases. Although heat dissipation of livestock occurs more rapidly in the foundation concrete than in the underlying soil, heat propagation to the soil becomes slow as the foundation concrete thickness increases. Therefore, if it is set as the said form, the heat | fever propagation to the soil under foundation concrete will be thrived, and it can be prevented from lacking in the heat storage in soil, and maintenance of building floor heating is attained.

  (4) In the building of any one of the above forms, the surface layer portion can be a concrete layer having a thickness of 100 to 300 mm. In this way, heat storage in the surface layer itself can be secured, and heat storage in the foundation concrete and the soil below it also proceeds, which is desirable from the top of the building floor heating.

  (5) The building according to any one of the above forms may have a notifying means for notifying whether or not the heating control of the heating element using the midnight power is executed. If it carries out like this, about the heating control of the heat generating body by midnight electric power until now can be newly alert | reported about the building which has not performed heating control of the heat generating body by midnight electric power until then.

  (6) In another form, the floor heating construction method for a building is a method of mounting a heat insulator on a foundation convex portion that rises from a foundation concrete that has already been constructed so as to cover the soil and serves as a foundation for the foundation of the building. A step (a) for heat insulation of an underfloor area of the building surrounded by the foundation convex part, and a heating element for applying heat to the soil under the foundation concrete of the building through the foundation concrete, The step (b) of installing a plurality on the surface of the foundation concrete for each underfloor area and the plurality of heating elements for each of the building underfloor areas between the lower surface of the building floor for each of the underfloor areas (C) and covering the surface with a surface layer portion, and installing a control means for controlling the heating of the heating element using the midnight power in a power contract time period based on a contract to receive energization of midnight power ( d).

  In this form of building floor heating construction method, the building in which the foundation concrete has already been constructed, for example, the building to be remodeled, or the building shed completely destroyed by natural disaster and the foundation concrete remains. For example, a floor heating construction can be planned to provide a building with a floor heating function.

  (7) In the floor heating construction method for a building according to the above aspect, in the step (C), after at least a partial area of the constructed building floor is removed, the building floor of the removed partial area is A surface layer part is brought into the building floor area, the plurality of heating elements for each of the building floor areas are covered with the surface layer part, and then the removed building area in the partial area can be repaired. . In this way, an existing building can be remodeled into a building with a floor heating function.

It is explanatory drawing for demonstrating the outline | summary of the floor heating building using the floor heating system. It is explanatory drawing for demonstrating the relationship between the structure of the floor heating system 100, and a building floor. It is explanatory drawing which shows the installation area | region of the electrical-resistance heating panel 102 to the foundation concrete KC in a schematic perspective view. It is explanatory drawing which shows the installation area | region of the electrical-resistance heating panel 102 to the foundation concrete KC roughly by planar view. It is explanatory drawing which shows the floor heating construction procedure performed with respect to the building K which lost the building K in the new construction process, or a roof. It is a flowchart which shows the processing content of electric power feeding control. It is explanatory drawing which shows the mode of the setting of the heat generating capacity | capacitance of the several electrical resistance heating panel 102 which the floor heating system 100 has linked | related with the thickness of the completed foundation concrete KC. It is explanatory drawing which shows the floor heating construction procedure at the time of renovating the existing building to the floor heating building YK. It is explanatory drawing which shows the detail of a construction procedure typically.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram for explaining an outline of a floor heating building using the floor heating system 100, and FIG. 2 is an explanatory diagram for explaining a relationship between the configuration of the floor heating system 100 and a building floor.

  As shown in the figure, the floor heating building YK includes a floor heating system 100 as an example in the foundation portion of the building K, and has the control device 200 on the foundation portion or the wall surface of the building, for example. In the present embodiment, the control device 200 is incorporated in an openable / closable box (not shown) having a dustproof and waterproof function, and the box is embedded in the base portion. When the control device 200 is installed on a building wall surface, it may be installed at an appropriate place where it can be operated. The floor heating system 100 is for making the foundation concrete and the soil below the heat storage state. As shown in detail in FIG. 2, the foundation concrete KC that has already been constructed to cover the soil D of the foundation portion of the building K. The electric resistance heating panel 102, the concrete layer 105, and the heat insulator 107 are provided on the upper surface. In this case, it is desirable that the applied foundation concrete KC has a thickness of at least 100 to 150 mm in terms of strength and heat storage of the soil D described later.

  The electric resistance heating panel 102 is formed in a flat plate shape and has a structure that generates heat in a sheet shape by an electric resistance heating wire that is folded back with watertightness. is set up. The concrete layer 105 covers the electric resistance heating panel 102 with a thickness of 100 to 300 mm after securing a gap T within a range of 50 to 300 mm between the lower surface of the building floor 150 of the building K, and to the lower layer. It functions to prevent water from entering and protect the lower layer. The concrete layer 105 is integrated with the foundation concrete of the building K. The heat insulating body 107 is mounted on a foundation convex portion KT that rises from the foundation concrete KC that has been constructed and receives the foundation 150D of the building K, and insulates the below-mentioned area of the floor under the building that is surrounded by the foundation convex portion KT. Plan. In addition, the foundation convex part KT may be configured as a cloth foundation or a solid foundation.

  In constructing the above-mentioned floor heating system 100 to the foundation concrete KC that has been constructed, a lowermost sand layer (not shown) is formed on the upper surface of the foundation concrete KC with a thickness of about 30 mm using mountain sand without pebbles, The electrical resistance heating panel 102 may be installed in the sand layer. Further, before covering the electric resistance heating panel 102 with the concrete layer 105, the electric resistance heating panel 102 is covered in advance with a sand layer (upper sand layer) of about 50 mm using mountain sand without pebbles and the like. It can also be covered with 105. In this case, the electric resistance heating panel 102 is covered with two layers of the upper sand layer and the concrete layer 105 thereon. A moisture-proof film (not shown) may be interposed at the boundary between the upper sand layer and the concrete layer 105.

  The floor heating system 100 having the above configuration heats the panel by energizing the electrical resistance heating panel 102 to make the foundation concrete KC and the soil D covered therewith a heat storage state, and the soil D has a reverse dome-shaped heat storage. Layer Dh is formed. The state of formation of the heat storage layer Dh is not different from the existing configuration proposed in the above-mentioned patent documents.

  Next, how the electric resistance heating panel 102 is installed will be described. FIG. 3 is an explanatory view schematically showing the installation area of the electrical resistance heating panel 102 on the foundation concrete KC in a perspective view, and FIG. 4 is a schematic plan view of the installation area of the electrical resistance heating panel 102 on the foundation concrete KC. It is explanatory drawing shown.

  As shown in the figure, the foundation convex portion KT rises from the foundation concrete KC and covers the soil D shown in FIG. 2 at the outer peripheral edge of the foundation concrete KC and the living space section of the building K. Partition. In this embodiment, the regions surrounded and divided by the basic convex portions KT are, as shown in FIGS. 3 to 4, the first underfloor region R1 to the sixth underfloor region R6, and the sixth underfloor region R6. Is an area excluding the soil foundation DK between the entrance soils. And in the floor heating system 100 of a present Example, as shown in FIG. 4, several electric resistance heating panels 102 are provided on the surface of the foundation concrete KC for every underfloor area | region of 1st underfloor area | region R1-6th underfloor area | region R6. Install and prepare. The electrical resistance heating panel 102 thus installed generates heat under the control of the control device 200 to be described later, and applies the heat to the foundation concrete KC and the underlying soil D through the foundation concrete KC, and stores the soil D as heat storage. State. The number of installed electrical resistance heating panels 102 for each underfloor region in the first underfloor region R1 to the sixth underfloor region R6 is set according to the size of each underfloor region and the position occupied by the building K. In this case, if the building K is a wide one-story building such as a gymnasium or a public hall, the areas under the floors are substantially the same, and therefore the same number of electrical resistance heating panels 102 may be installed.

  In this embodiment, the building floor 150 of the building K built on the foundation concrete KC is, as shown in FIG. 2, from the floor heating system 100 side, the base 150D, the large draw 151, the joist 152, and the floor base material. 153, the flooring material 154 is provided, and the gap T between the building floor 150 and the surface layer of the floor heating system 100 is formed by the large drawing 151 and the joist 152 spanned over the base 150D. That is, by changing the size of the large draw 151 and the joist 152 and the group structure thereof, or by changing the thickness of the concrete layer 105, the gap T can be various. It is defined according to the required degree of heating at the installation location, specifically the heating temperature and frequency, and the state of soil heat storage by the floor heating system 100.

  As shown in FIG. 1, the control device 200 can supply power from the rated power transmission line LA and power from the emergency first power transmission line LB and the emergency second power transmission line LC. The heating panel 102 is energized. The first emergency power transmission line LB is installed along with the building K, or is extended from the wind power generator FW installed in the municipality to which the building K belongs to the control device 200. The wind power generator FW converts wind energy into electrical energy through rotation of a rotor that rotates by receiving wind power. And this wind power generator FW produces | generates with the electric energy according to a wind force, and supplies the generated electric power through the 1st emergency power transmission line LB. That is, the wind power generator FW corresponds to an energy source that converts energy resulting from a natural phenomenon of wind generation that occurs in nature into electrical energy. Such a wind power generator FW is not supplied by a power company commercially using a power generation system such as thermal power generation, nuclear power generation, or hydroelectric power generation, but is a power generation apparatus attached to the building K or a commercial power company. It is a power generator (for example, a wind power generator that uses a local government unit to which the building K belongs as a power supply area, a wind power generator that uses a neighboring area as a power supply area) that has an area that is narrower than the supply area. The emergency second power transmission line LC extends from the control device 200 along with the building K and is wired to transmit power generated by the generator EW that generates power using the internal combustion engine to the control device 200. Since this generator EW is portable and portable, it is not usually necessary to attach it to the building K, and power loss from the rated transmission line LA due to natural disasters such as earthquakes and tsunamis has occurred. Just prepare it.

  The control device 200 includes a logical operation circuit such as a CPU, a ROM, and a RAM, and includes a control unit 202, a memory unit 204, an I / O unit 206, an input unit 208, a notification unit 209, and the like. The memory unit 204 stores an energization program for the electrical resistance heating panel 102 and the like. The I / O unit 206 is connected to the floor temperature sensor 210 that detects the temperature (floor temperature) of the building floor 150, the outside air temperature sensor 212 that detects the outside air temperature, and the like. The input unit 208 is connected to each of the power transmission lines described above, and selects a power transmission line that receives power supply under the control of the control unit 202. The control device 200 is responsible for overall control of the floor heating system 100 such as energization control to the electric resistance heating panel 102 according to the sensor input. In this case, the input unit 208 is configured to perform manual transmission line selection or when the power supply from the rated transmission line LA is stopped due to a natural disaster or the like, the first emergency transmission line LB or the second emergency transmission line LC. It can be configured to automatically switch to power supply from. As will be described later, when the electric resistance heating panel 102 is controlled to be heated at midnight power, the notification unit 209 lights up with a lamp or the like to notify that the control is being performed.

  In this embodiment, the control device 200 is embedded and installed in the foundation concrete KC as described above in preparation for loss of power supply due to natural disasters such as earthquakes and tsunamis, but the control of the floor heating system 100 can also be divided into two systems. Specifically, the control system of the electric resistance heating panel 102 by late-night power feeding from the rated transmission line LA and the control system by emergency feeding from the emergency first transmission line LB or the emergency second transmission line LC Divide. In the control device 200 for the former control system, the control device 200 for the latter control system can be embedded in the foundation concrete KC as described above. If it carries out like this, the normal maintenance with the electric power feeding from rated power transmission line LA will become easy. In addition, when power is lost due to natural disasters, floor heating by power supply from the first emergency transmission line LB or the second emergency transmission line LC is continued or started using the control device 200 embedded in the foundation concrete KC. can do.

  Next, the construction procedure of the above-described floor heating building YK will be described. FIG. 5 is an explanatory diagram showing a floor heating construction procedure to be performed on the building K in the process of new construction or the building K whose roof has been lost.

  As shown in the drawing, first, the heat insulating body 107 is attached to the inner peripheral wall of the foundation convex portion KT (see FIG. 2) that has risen from the foundation concrete KC that has been constructed so as to cover the soil D (step S100). The heat insulating body 107 is a panel-shaped commercially available heat insulating material such as an extruded expanded polystyrene foam. When the heat insulating body 107 is mounted, the inner peripheral wall of the base convex portion KT is smoothed with an appropriate tool, an adhesive is applied, and the heat insulating body 107 is bonded and fixed with the adhesive. And the 1st underfloor area | region surrounded by the base convex part KT by performing mounting | wearing of the heat insulating body 107 for every underfloor area | region of 1st underfloor area | region R1-6th underfloor area | region R6 shown in FIGS. Insulation of each underfloor region of R1 to sixth underfloor region R6 is achieved. In this case, since the construction object is the above-mentioned building K with the loss of the roof, it is possible to mount the heat insulating body 107 in parallel with the fixing of the base 150D to the base convex portion KT. In addition, it is possible to dispose an airtight sheet or the like between the top of the base convex portion KT and the base 150D, or to extend the heat insulating body 107 to the top surface of the base 150D and attach the base convex portion KT to the base convex portion KT. It is desirable from the viewpoint of ensuring heat insulation.

  Next, a plurality of electrical resistance heating panels 102 are installed on the surface of the foundation concrete KC that has been constructed so as to cover the soil D (step S110). This panel installation is performed for each underfloor area of the first underfloor area R1 to the sixth underfloor area R6 surrounded by the base convex portion KT, and the number of panel installations in each area is as described above. It is set according to the area occupied by the building K and the position occupied by the building K, or according to the building shape and application. In addition, each electrical resistance heating panel 102 is waterproofed at the connection location.

  After the panel installation, concrete is poured to cover the plurality of electrical resistance heating panels 102 for each of the underfloor regions (see FIGS. 3 to 4) of the first underfloor region R1 to the sixth underfloor region R6, and the surface is smoothed (step S120). ). Since the poured concrete becomes a concrete layer 105 shown in FIG. 2 after curing, the concrete is poured between the surface of the concrete layer 105 after curing and the lower surface of the building floor 150 of the building K. After securing T, the thickness is 100 to 300 mm. In addition, when installing the sensor for grasping | ascertaining the heat storage state of the soil D, it embeds in the concrete into which the said sensor was poured.

  Following or after the concrete pouring, the control device 200 is embedded in the foundation convex portion KT (step S130), and the concrete is cured (step S140). After the concrete curing, the floor heating building YK is completed by assembling the roof of the building K such as the installation of the base 150D (step S150).

  Next, power supply control performed by the control device 200 will be described. FIG. 6 is a flowchart showing the processing content of power supply control.

  In this power supply control, the period during which heating is required, for example, from winter to early spring as determined by the calendar, or during the period specified by the date, the outside air temperature has exceeded the predetermined temperature after it has decreased below the predetermined temperature. It is repeatedly executed in a period or the like. First, it is determined whether or not midnight power is supplied (step S200). If an affirmative determination is made here, the control device 200 applies electric power (contract stipulated power) based on a contract for receiving energization of midnight power to the plurality of electric resistance heating panels 102 of the floor heating system 100 so as to store heat in the soil D ( Step S210). At this time, the control device 200 notifies the notification unit 209 that the electric resistance heating panel 102 is controlled to be heated by midnight power with a lamp or the like. In this way, for the building K that has not been heated by midnight power before construction of the floor heating system 100, floor heating through heating control of the electrical resistance heating panel 102 by midnight power will be implemented in the future. Can be recognized.

  On the other hand, if it is determined in step S200 that no late-night power is supplied, the control device 200 generates power from either the wind power generator FW or the generator EW that can effectively supply power to the input unit 208. Electric power is supplied to the plurality of electrical resistance heating panels 102 of the floor heating system 100 to store the soil D (step S220). At this time, the control device 200 indicates that the electric resistance heating panel 102 is heated and controlled by the generated power of either the wind power generator FW or the generator EW in the notification unit 209. In a different manner from the case, the lamp is lit to notify the user. By doing so, it is possible to distinguish and recognize whether floor heating is performed by late-night power or floor heating is performed by either the wind power generator FW or the generator EW.

  The energization control of the electrical resistance heating panel 102 at the time of heat storage of the soil D in the above steps S210 and 220 may follow the existing method made in the above-mentioned patent publications and the like. And since the energization of the electrical resistance heating panel 102 in step S220 is at the time of stopping the supply of midnight power, unlike the existing method, a time zone (for example, daylight) other than the midnight power supply time zone (midnight) In the middle), heat storage of the soil D can be achieved by the generated power of either the wind power generator FW or the generator EW. For example, if the floor heating building YK after completion is an evacuation site in the event of a natural disaster such as a public hall or a gymnasium, more people will gather in the house at the time of evacuation. Therefore, in such a case, regardless of whether it is daytime or late at night, by storing the soil D with the generated power of either the wind power generator FW or the generator EW, Can bring relaxation.

  In addition, in performing the energization control of the electric resistance heating panel 102 at the time of heat storage of the soil D in the above Steps S210 and 220, in this embodiment, the thickness of the installed foundation concrete KC that is the installation target of the electric resistance heating panel 102 is set. Accordingly, the heat generation capacity of the electric resistance heating panel 102 is specified in advance. FIG. 7 is an explanatory diagram showing the setting of the heat generation capacity of the plurality of electrical resistance heating panels 102 of the floor heating system 100 in association with the thickness of the foundation concrete KC that has been constructed. As shown in the figure, in this example, the heat generation capacity of the electrical resistance heating panel 102 was increased as the thickness of the foundation concrete KC after construction was increased.

  As described above, in the building K of the present embodiment, the plurality of electrical resistance heating panels 102 for making the soil D in a heat storage state and the foundation concrete KC that has been constructed so as to cover the soil D are received by the foundation 150D. It installs for every underfloor area | region of 1st underfloor area | region R1-6th underfloor area | region R6 surrounded by the basic | foundation convex part KT used as. The plurality of electrical resistance heating panels 102 for each underfloor region of the first underfloor region R1 to the sixth underfloor region R6 are covered with the concrete layer 105 while ensuring a gap T between the lower surface of the building floor 150, Under the control of the control device 200, heat is generated by the midnight power in the power contract time zone based on the contract for receiving energization of the midnight power.

  The electrical resistance heating panel 102 warms the concrete layer 105 and the foundation concrete KC covering the panel, and also transfers heat to the soil D under the foundation concrete KC, so that the soil D is in a heat storage state. In addition, each of the underfloor regions of the first underfloor region R1 to the sixth underfloor region R6 is insulated by the heat insulating body 107 attached to the foundation convex portion KT surrounding the first underfloor region R6. It can be kept in each underfloor area of 1 underfloor area R1 to 6th underfloor area R6. Thus, the heat stored in the soil D and the heat that warms the concrete layer 105 and the foundation concrete KC are radiated to the gap T between the surface of the concrete layer 105 and the lower surface of the building floor 150, and the building floor 150 The floor heating of the building K can be achieved. As a result, according to this example, when the foundation concrete KC has been installed, or when the building roof is completely destroyed due to a natural disaster, the foundation concrete KC remains. The said building at the time of constructing a building anew in concrete KC can be made into the floor heating building YK in which floor heating is possible.

  Further, in this embodiment, when the power supply is stopped at midnight due to some cause, for example, a long-term failure of the power supply facility or loss of the power supply line due to natural disasters, the power from the wind power generator FW or the generator EW is used to The resistance heating panel 102 is heated (step S220). For this reason, according to the present Example, the floor heating of the building K can be aimed also under the condition where the power supply for midnight stopped for some reason.

  Further, in this embodiment, the plurality of electrical resistance heating panels 102 for each underfloor region of the first underfloor region R1 to the sixth underfloor region R6 are heated so that the heat generation capacity increases as the thickness of the finished foundation concrete KC increases. Control (see FIG. 7). Although the heat-dissipation of the foundation concrete KC that has already been completed occurs more quickly than the soil D underneath it, the propagation of heat to the soil D becomes slow as the thickness increases. Therefore, in this example, the heat generation capacity of the electrical resistance heating panel 102 increases as the thickness of the foundation concrete KC that has been constructed increases, so that heat propagation to the soil D under the foundation concrete is active, and heat storage in the soil D is increased. Building floor heating can be maintained without deficiencies.

  Further, in this embodiment, when covering the plurality of electrical resistance heating panels 102 for each underfloor region of the first underfloor region R1 to the sixth underfloor region R6 with the concrete layer 105, the concrete layer 105 has a thickness of 100 to 300 mm. did. Therefore, the concrete layer 105 facing the building floor 150, heat storage by itself and heat radiation to the building floor 150 side can be secured, and the heat storage of the constructed foundation concrete KC and the soil D below it proceeds. The floor heating efficiency of things is ensured.

  Next, an example in which an existing building is a floor heating building YK by renovation will be described. FIG. 8 is an explanatory view showing a floor heating construction procedure when an existing building is reformed into a floor heating building YK, and FIG. 9 is an explanatory view schematically showing details of the construction procedure. In addition, in this Example, about the 6th under floor area | region R6 of the entrance part connected with the soil foundation DK, since the floor lower surface is adjoining to the completed foundation concrete KC, it is excluded from reform.

  As shown in the drawing, first, the flooring material 154 constituting the building floor 150 (see FIG. 2) is peeled off to form a construction opening RH in the flooring material 154 (step S105). Various methods for forming the construction opening RH can be adopted. In addition to the method for forming each underfloor region of the first underfloor region R1 to the fifth underfloor region R5 to be reformed, one underfloor region, for example, the first underfloor region R1 A method of forming the construction opening RH only in the underfloor region R1 can also be adopted. Usually, in the existing building K, a notch is provided in the base convex part KT so that a worker can travel between adjacent underfloor areas under the floor, so a construction opening RH is formed in one underfloor area. By doing so, it is possible for workers to come and go to other sub-floor areas. Further, as shown in FIG. 9, the size of the construction opening RH can be a part of the floor as well as the size of the entire floor of the room.

  After the construction opening RH is formed, the heat insulating body 107 is brought under the floor from the construction opening RH, and in each of the underfloor areas of the first underfloor area R1 to the fifth underfloor area R5 as in step S100 described above, A heat insulator 107 is attached and fixed to the inner peripheral wall of the convex portion KT (see FIG. 2). Next, steps S110 to 140 described above are executed, and the electrical resistance heating panel 102 is installed on the surface of the foundation concrete KC that has already been constructed in each underfloor region of the first underfloor region R1 to the fifth underfloor region R5, and the electrical resistance The concrete is poured so as to cover the heating panel 102, the control device 200 is buried, and the concrete is cured. After the concrete curing, the renovation of the existing building as the floor heating building YK is completed by closing the formed construction opening RH with the new flooring material 154 and repairing the floor (step S160).

  Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and can be implemented in various modes without departing from the scope of the present invention. For example, in the above embodiment, the electric resistance heating panel 102 installed on the surface of the foundation concrete KC that has been applied is covered with the concrete layer 105, but the electric resistance heating panel 102 is crushed into pebbles, sand, or small pieces. It can also be covered with a mixture of pebbles and sand.

  Moreover, in the construction procedure in the case of renovation of FIG. 8, peeling of the flooring material 154 can be omitted. For example, when an existing building K has a so-called underfloor storage box in, for example, a corridor or a kitchen, the first underfloor regions R1 to R5 shown in FIG. Workers can come and go to each underfloor region of the underfloor region R5. In such a case, the existing building can be reformed to the floor heating building YK by removing the flooring material 154 and executing steps S100 to S140 in FIG.

DESCRIPTION OF SYMBOLS 100 ... Floor heating system 102 ... Electrical resistance heating panel 105 ... Concrete layer 107 ... Insulation body 150 ... Building floor 150D ... Base 151 ... Large drawing 152 ... joist 153 ... Floor base material 154 ... Flooring material 200 ... Control apparatus 202 ... Control Section 204 ... Memory section 206 ... I / O section 208 ... Input section 209 ... Notification section 210 ... Floor temperature sensor 212 ... Outside air temperature sensor K ... Building D ... Soil T ... Gap R1-R6 ... First underfloor area-sixth Underfloor area LA ... Rated transmission line LB ... Emergency first transmission line LC ... Emergency second transmission line KC ... Foundation concrete (foundation concrete)
RH ... Opening for construction YK ... Floor heating building DK ... Soil foundation KT ... Foundation convex part EW ... Generator Dh ... Thermal storage layer

Claims (7)

A building that uses the heat stored in the soil as a heat source to heat the floor,
A thermal insulator that rises from the foundation concrete that has been constructed so as to cover the soil, is attached to the foundation convex portion that receives the foundation of the building, and insulates the area under the building floor surrounded by the foundation convex portion,
A plurality of heating elements that are installed on the surface of the foundation concrete for each area under the building floor, and heat the soil under the foundation concrete through the foundation concrete so that the soil is in a heat storage state;
A surface layer portion that covers the plurality of heating elements for each of the building floor areas with a space between the lower surface of the building floor for each of the building floor areas;
Control means for controlling heating of the heating element using the midnight power in a power contract time period based on a contract for receiving midnight power.   2. The building according to claim 1, wherein when the late-night power supply based on the contract is stopped, the control unit controls the heating of the heating element using electric power from a self-generating device.   The building according to claim 1 or 2, wherein the control means controls the heating element for each under-floor region of the building so that the heat generation capacity increases as the thickness of the foundation concrete increases.   The building according to any one of claims 1 to 3, wherein the surface layer portion is a concrete layer having a thickness of 100 to 300 mm.   The building according to any one of claims 1 to 4, further comprising notification means for notifying whether or not the heating control of the heating element using the midnight power is performed. A floor heating construction method for a building,
A process of mounting a heat insulating body on a foundation convex portion that rises from a foundation concrete that has already been constructed so as to cover the soil and serves as a foundation for the building, and insulates the area under the building floor surrounded by the foundation convex portion ( a) and
A step (b) of installing a plurality of heating elements for applying heat to the soil under the foundation concrete of the building through the foundation concrete on the surface of the foundation concrete for each area under the building floor;
A step (c) of securing a gap between the plurality of heating elements for each of the building underfloor regions and a lower surface of the building floor for each of the building underfloor regions and covering the surface with a surface layer portion;
A floor heating construction method for a building, comprising: a step (d) of installing a control unit that controls heating of the heating element using the late-night power in a power contract time period based on a contract for receiving energization of late-night power.   In the step (C), after removing at least a partial area of the constructed building floor, the surface layer part is brought into the area below the building floor from the building floor of the removed partial area, and the surface layer part The floor heating construction method for a building according to claim 6, wherein the plurality of heating elements for each area under the building floor are covered, and then the building floor of the removed partial area is repaired.

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