JP6381449B2 - Floor heating system and floor heating method - Google Patents

Description

  The present invention relates to a floor heating system and a floor heating method using the floor heating system.

  As a floor heating system and a floor heating method, one that warms a floor material through warm water through a floor panel with a pipe built in the floor material or one that warms the floor material by energizing the floor panel with a built-in electric heater in the floor material is known. is there. However, since these require a dedicated heat source for floor heating, there is a problem that running costs increase.

  Moreover, since the flooring is directly heated by a hot water pipe or an electric heater built in the flooring, the flooring can be at a high temperature. Therefore, the problem is that the floor material dries and warps and cracks occur, and the use of a floor material with improved heat resistance to prevent it increases the cost, and the degree of freedom in selecting the floor material is increased. There was a problem of being low.

  In view of this, the present inventor has proposed and implemented a floor heating system in which sunlight is effectively used to gently perform floor heating (see Patent Documents 1 and 2). The technology of Patent Document 1 provides a window having a window structure that allows sunlight to pass through, while the floor is a double-structure floor composed of an upper floor portion and a lower floor portion, and the lower end of the duct whose upper end is open above the indoor space. By connecting to the floor internal space inside the double structure floor, the air in the indoor space is pumped to the floor internal space by a blower through the duct, and the communication between the floor internal space and the indoor space is made It is. With such a configuration, the air in the indoor space heated by sunlight transmitted through the window is introduced into the floor interior space through the duct. Thus, the double structure floor is warmed by the air heated by sunlight, and the heated air is ejected from the communicating portion to warm the indoor space. In addition to the double structure floor, the duct and the communication part, the technique disclosed in Patent Document 2 includes a roof ventilation space that allows air to flow along the roof surface, and a chamber that allows air flowing through the roof ventilation space to flow in. And a blower for releasing the air in the chamber into the indoor space. With such a configuration, air heated by sunlight in the roof ventilation space is taken into the chamber, then released into the indoor space and introduced into the floor interior space via the duct. Thus, the double structure floor is warmed by the air heated by sunlight, and the heated air is ejected from the communicating portion to warm the indoor space.

  Therefore, in the techniques of Patent Documents 1 and 2, natural energy such as sunlight is used for floor heating, and a dedicated heat source for floor heating is not required, so that the running cost can be suppressed. In the technique of Patent Document 1, it is the air in the indoor space that is heated by sunlight, and in the technique of Patent Document 2, the air heated by the sunlight in the roof ventilation space is once released into the indoor space. The floor internal space into which the heated air is introduced does not become excessively hot. For this reason, even if the floor material is not particularly improved in heat resistance, there is no possibility that the floor material is warped or cracked, and there is an advantage that the degree of freedom in selecting the floor material is high.

  The present invention realizes the same effect as the techniques of Patent Documents 1 and 2 by different means, and thereby can heat the floor excessively without requiring a dedicated heat source for floor heating. The purpose is to further expand the range of floor heating that is not available.

Japanese Patent No. 4638831 Japanese Patent No. 4751363

  As described above, the present invention provides a floor heating system that does not require excessive heating of the floor without requiring a dedicated heat source for floor heating, and a floor heating method using the floor heating system. , That is the subject.

In order to solve the above problems, a floor heating system according to the present invention is:
“A floor heating system that heats the floor of a building,
A double-structure floor composed of an upper floor portion and a lower floor portion separated from each other, and having a floor interior space inside;
A heat insulating part provided between the double structure floor and the foundation part underfloor space;
A blower that pumps air in an indoor space into the floor internal space;
An outlet for blowing air from the floor interior space into the indoor space;
A pipe disposed in the floor interior space, one end being an outlet from the bathtub and the other end being an inlet to the bathtub;
A pump for circulating hot water between the pipe and the bathtub.

  A “double-structure floor” can be constructed by placing a support member or spacer between both floor portions with the upper floor portion and the lower floor portion separated vertically. A “floor interior space” is formed. Here, when the height of the floor internal space (the separation distance between the upper floor portion and the lower floor portion) is too small, the resistance when air flows increases, while the height of the floor internal space is too large. Convection easily occurs when air flows. Therefore, in order to allow air to circulate well in the floor internal space, the height of the floor internal space is desirably 20 mm to 70 mm, and more desirably 25 mm to 40 mm.

  The “heat insulating portion” can be formed by laminating a heat insulating material such as a board shape, a sheet shape, or a mat shape on the lower surface or the upper surface of the lower floor portion. Alternatively, the lower floor portion can be further formed into a double structure, and the space inside thereof can be filled with a heat insulating material.

  As a configuration for `` pumping the air in the indoor space by a blower '' to the floor internal space, the end of the pipe line that opens to the indoor space is connected to the floor internal space, at both ends of the pipe line and at least one place in the middle, The structure which provided the air blower can be illustrated. Alternatively, it is possible to provide a configuration in which a vent hole communicating with the floor interior space is provided in the upper floor portion, and the air in the indoor space is sucked by a blower attached to the vent hole. Note that the term “indoor space” is used to include spaces in attics and ceilings.

  The “air outlet” is a hole formed through the upper floor, leaving a gap between the upper floor and the wall, or having a double wall structure and its internal space in the floor. It can be formed by providing a hole penetrating the inner wall after communicating with the internal space. If such an outlet is covered with a louver whose opening degree can be adjusted, the amount of air ejected from the outlet can be adjusted, which is preferable.

  The “pipe” can be disposed in the interior space of the floor by being fixed to the upper surface of the lower floor portion constituting the double structure floor. By doing in this way, compared with the case where it arrange | positions so that a pipe may be affixed on the lower surface of a flooring, a pipe can be fixed stably. If the “pipe” is arranged in a meandering manner in the interior space of the floor, the area of contact between the hot water circulating in the pipe and the air in the interior space of the floor will increase, and the amount of heat exchange will increase. Therefore it is desirable.

  In the present invention having the above-described configuration, the hot water in the bathtub is circulated through the pipe disposed in the floor internal space so that the heat of the hot water and the air in the floor internal space can be exchanged, and the air in the floor internal space can be heated. it can. Since a heat insulating part is provided between the double structure floor and the foundation part underfloor space, the heat of the hot water flowing through the pipe is taken away by the foundation part with high heat capacity or the foundation part underfloor space with a large volume. The air in the floor interior space is efficiently heated. In the floor internal space, air in the indoor space is pumped by a blower, and since the pumped air blows out from the outlet to the indoor space, an air circulation path is formed between the indoor space and the floor internal space. Yes. Thereby, the air in the floor internal space heated by heat exchange with hot water is blown out from the outlet to the indoor space and warms the air in the upper surface of the upper floor and the indoor space. The heated air in the floor interior space also warms the upper floor portion from the lower surface side. The air blown into the indoor space is again pumped into the floor interior space by the blower, and heated by exchanging heat with hot water circulating in the pipe.

  According to the present invention, by circulating hot water in a bathtub with a pipe, the air in the floor interior space can be heated and floor heating can be performed. Therefore, if the remaining hot water of the bath is used as the hot water to be circulated, the heat of the remaining hot water, which has conventionally been “discarded”, can be used for floor heating as a heat source. Thereby, floor heating can be performed without requiring a dedicated heat source for floor heating. Here, it has been reported that the proportion of expenses for hot water supply for baths actually accounts for more than 30% of the annual utility costs of ordinary households in Japan. In other words, in the past, high-cost heat energy was discarded after bathing and wasted. According to the present invention, it is possible to effectively use energy resources by reducing such waste, and it is possible to perform floor heating at a lower running cost than when a dedicated heat source is used.

The floor heating system according to the present invention, in addition to the above configuration,
"A heating device provided in the upper part of the indoor space,
In the indoor space, further comprising a duct having an upper end opened in the vicinity of the heating device and a lower end connected to the floor interior space,
The blower may be configured to pressure-feed air in the indoor space to the floor interior space through the duct.

  As the “heating device”, an air conditioner, an electric heater, a gas heater or the like for air conditioning can be used. In addition, the “upper part” of the indoor space in which the heating device is provided refers to the upper layer part of the indoor space where warm air easily rises and gathers, and varies depending on the structure of the building, for example, a mountain roof such as a gable roof In the case of a building having a roof, the attic space close to the ridge can be used, and in the case of a building having a single-flow roof, the attic space on the higher roof side can be used.

  The “duct” is a configuration for transferring heated air in the vicinity of the heating device to the floor interior space, and can be formed in a cylindrical shape or a rectangular tube shape. The upper end of the duct is opened near the heating device. In order to efficiently guide the air heated by the heating device into the duct, an enclosure is provided around the heating device, and the upper end of the duct is opened in the enclosure. be able to. In addition, the “blower” that pumps the air in the indoor space to the floor interior space through the duct can be provided in at least one of the upper end, the middle, and the lower end of the duct.

  In this configuration, a heating device used in most homes is used for floor heating when the temperature is low, such as in winter, and is used in combination with floor heating using the remaining hot water in the bath. Since warm air naturally rises, it is disadvantageous to provide a heating device at the top of the indoor space for the normal purpose of warming the air in the indoor space. On the other hand, in the present invention, a heating device is intentionally provided in the upper part of the indoor space, and the air heated by the heating device is first guided to the floor interior space through the duct. As described above, pipes are disposed in the floor interior space, and hot water in the bathtub is circulated. Thereby, the air heated with the heating apparatus is heated by heat exchange with the hot water which distribute | circulates the inside of a pipe, and also becomes high temperature. The air heated in the floor internal space warms the upper floor portion from the lower surface side and blows out from the outlet. The air blown out from the air outlet rises while applying heat to the air on the upper surface of the upper floor and the indoor space, reaches the upper part of the indoor space, is heated again by the heating device, and is further introduced into the floor interior space through the duct. Is done.

  Therefore, according to this structure, in addition to the remaining hot water in the bathtub, a heating device used in most homes is used in the cold season as a heat source for heating the air in the floor interior space. Thereby, by using together the heat sources which are not the heat source for exclusive use for floor heating, expense can be suppressed more and floor heating can be performed more efficiently.

  In addition, since warm air rises naturally, it can contribute to the lives of residents, such as air heated by sunlight shining through windows, the use of fire in the kitchen, and heat generated by other heating and lighting equipment. The air warmed by the heat generated therewith rises naturally and collects in the upper part of the indoor space. The warm air gathered in the upper part of the indoor space in this way is also transferred to the floor interior space through the duct together with the air heated by the heating device. Thereby, in addition to the air heated using the hot water of the bathtub or the heating device as a heat source, the warm air generated indoors due to other factors can be used comprehensively and efficiently without any waste.

Next, the floor heating method according to the present invention is as follows.
“A floor heating method using the floor heating system described above,
The remaining hot water in the bath is circulated between the bathtub and the pipe, and heat is exchanged between the remaining hot water through the pipe to heat the air in the interior space of the floor, and the heated air The upper floor portion is heated from the lower surface side, and heated air is blown out from the outlet to the indoor space, and the upper floor portion is heated from the upper surface side while heating the indoor space.

  The present invention is made possible by using the floor heating system having the above-described configuration, and the conventional “discarded thermal energy” of the remaining hot water in the bath is utilized as a heat source for floor heating. . Thereby, as already mentioned above, waste of energy resources can be reduced, and floor heating can be performed while running costs are reduced. Moreover, since the temperature of the remaining hot water in the bath is about 42 ° C. at the highest, the temperature of the floor interior space heated by the heat exchange with the remaining hot water does not become higher. Therefore, the current floor heating method in which hot water of about 60 ° C. is circulated through the pipes built in the flooring or the electric heaters built in the flooring can be energized, so that the temperature can be considerably high depending on the user's setting. Unlike conventional floor heating methods, floor heating can be performed without excessively heating the floor.

  As described above, as an effect of the present invention, a floor heating system that does not excessively heat a floor without requiring a dedicated heat source for floor heating, and a floor heating method using the floor heating system are provided. Can be offered.

It is a longitudinal cross-sectional view of the building to which the floor heating system of one Embodiment of this invention was applied. It is an enlarged view of the principal part in FIG. It is a sketch of the building of FIG. It is a graph which shows the temperature change at the time of application of the floor heating system of FIG. It is a longitudinal cross-sectional view of the building to which the floor heating system of other embodiment of this invention was applied.

  Hereinafter, a floor heating system according to an embodiment of the present invention and a floor heating method using the floor heating system will be described with reference to FIGS. 1 to 4.

  First, the structure of the floor heating system of this embodiment and the building 1 to which this system is applied will be described. As shown in FIGS. 1 to 3, the building 1 is composed of an upper floor portion 11 and a lower floor portion 12 that are separated from each other, and a double structure floor 10 having a floor internal space 15 inside, and a double structure floor 10. The heat insulation part 30 provided between the base part underfloor space 55, the air blower 21 which pumps the air of the indoor space 60 to the floor internal space 15, and the blower outlet 17 which blows air from the floor internal space 15 to the indoor space 60. And the hot water is circulated between the pipe 40 and the bathtub 67, which is disposed in the floor internal space 15, one end of which is the outlet 41 from the bathtub 67 and the other end is the inlet 42 to the bathtub 67. And a pump 45.

  In addition, the building 1 includes a heating device 47 provided in an upper portion of the indoor space 60 and a duct 20 having an upper end opened in the vicinity of the heating device 47 in the indoor space 60 and a lower end connected to the floor interior space 15. Furthermore, the blower 21 pressure-feeds the air in the indoor space 60 to the floor internal space 15 through the duct 20.

  More specifically, the building 1 of the present embodiment is a two-story building having a loft, and the indoor space 60 is partially divided into three layers by a first floor space 61, a second floor space 62, and an attic space 63 in the loft. In addition, a part of the space 64 is a ventilated space 64 from the first floor to the attic.

  The double structure floor 10 is configured such that the lower floor portion 12 and the finished upper floor portion 11 are separated from each other by 25 mm to 40 mm by disposing spacers (not shown). Further, the double structure floor 10 has a pit 25 as an air expansion space for expanding the air discharged from the opening at the lower end of the duct 20 before introducing it into the floor internal space 15. The pit 25 is a concave shape having an elongated U-shaped cross section along the wall, and an opening edge thereof is continuous with the lower floor portion 12. In addition, the air expansion space is formed in a concave shape, and is also formed by forming the pit 25 of the present embodiment into a box shape that opens downward as if it is turned upside down and connecting the opening edge to the upper floor portion 11. be able to.

  The upper floor portion 11 is provided with air outlets 17 penetrating therethrough. These air outlets 17 are elongated slits, and each is covered with a louver capable of adjusting the opening.

  The heat insulating portion 30 is formed by sticking a heat insulating board to the lower surface of the lower floor portion 12. Further, in order to prevent the air introduced into the pit 25 through the duct 20 from being cooled, a pit heat insulating portion 31 by a heat insulating board is similarly provided on the bottom surface and side surface of the pit 25. The space below the heat insulating portion 30 is a foundation underfloor space 55 surrounded by the foundation portion 55 of the building 1, and the foundation underfloor space 55 does not communicate with the floor interior space 15. This foundation underfloor space 55 can be ventilated outdoors through a vent (not shown), and the vent can be opened and closed.

  The duct 20 has a cylindrical shape with a diameter of 150 mm to 250 mm, is erected in the blow-off space 64, and an opening at the lower end is inserted into the pit 25 from above. The remaining part of the opening of the pit 25 other than the part where the lower end of the duct 20 is inserted is covered with a removable pit cover 26, and the upper surface of the pit cover 26 is the same as the upper surface of the upper floor 11. It is the same surface.

  The upper end of the duct 20 opens in the attic space 63. That is, in the present embodiment, the attic space 63 corresponds to “the upper portion of the indoor space 60”. In this attic space 63, an air conditioner for air conditioning as a heating device 47 is installed, and an “enclosure” (not shown) is provided around the front surface (hot air blowing surface) of the heating device 47. In the enclosure, the duct 20 is opened so that the upper end of the duct 20 faces the front of the heating device 47. The blower 21 is a fan such as a propeller fan or a sirocco fan, and is provided in the middle of the duct 20 in the present embodiment.

  The pipe 40 is made of a resin having a diameter of 9 mm to 16 mm, and is fixed to the lower floor portion 12 so as to meander in the floor internal space 15 of the double structure floor 10. The outlet 41 at one end of the pipe 40 is connected to a side wall near the bottom of the bathtub 67 of the bathroom 66. The inlet 42 at the other end of the pipe 40 is open to a wall surface in contact with the bathtub 67 in the bathroom 66, and a hose that hangs down in the bathtub 67 is connected to the inlet 42. The pipe 40 is connected to a pump 45 that transfers hot water from the outlet 41 toward the inlet 42. Thus, when the pump 45 is operated, the hot water in the bathtub 67 flows out from the outlet 41 and flows through the pipe 40 meandering into the floor internal space 15 of the double structure floor 10 and then flowing. The movement of returning from the inlet 42 into the bathtub 67 and flowing out from the outlet 41 is repeated and circulated. In addition, the strainer is attached to the outflow port 41, and it is suppressed that the stain | pollution | contamination and garbage in hot water flow in into the pipe 40. FIG. In addition, in order to suppress the fall of hot water temperature, it is desirable to use what has a heat insulation layer as the bathtub 67, and the base part underfloor space 55 below the bathroom 66 is made into a closed space at the time of performing floor heating. desirable.

  Next, a floor heating method using the floor heating system of the present embodiment will be described. When the temperature is low, such as in winter, the heating device 47 is operated. The air heated by the heating device 47 is transferred by the blower 21 through the duct 20 toward the floor internal space 15. The transferred air flows into the pit 25 from the duct 20, is spread in the pit 25, and then flows into the floor internal space 15 of the double structure floor 10. The heated air warms the upper floor portion 11 from the lower surface side while flowing through the floor internal space 15. Further, as air is continuously pumped into the floor interior space 15 through the duct 20, the air is pushed out from the floor interior space 15, and warm air is blown out from the outlet 17 into the indoor space 60. The warm air blown out from the air outlet 17 warms the upper floor portion 11 from the upper surface side and rises while warming the air in the indoor space 60. When the raised air reaches the upper part of the indoor space 60 (attic space 63), it is taken into the heating device 47 and heated again. And the heated air is again introduce | transduced into the floor interior space 15 through the duct 20, and the above-mentioned movement of air is repeated.

  After supplying hot water to the bathtub 67 and taking a bath, the pump 45 is operated. Thus, the remaining hot water in the bathtub 67 flows into the pipe 40 from the outlet 41, flows through the pipe 40, returns to the bathtub 67 from the inlet 42, and flows into the pipe 40 from the outlet 41 again. Repeat moving. The hot water flowing through the pipe 40 stretched around the floor internal space 15 exchanges heat with the air in the floor internal space 15, and further heats the air heated by the heating device 47. As described above, the heated air warms the upper floor portion 11 from the lower surface side, and blows out from the air outlet 17 to the indoor space 60 and rises while warming the upper surface of the upper floor portion 11 and the indoor space 60.

  As described above, in the present embodiment, floor heating is performed using the “heat energy that has been discarded” in the related art of the remaining hot water in the bathtub 67 as a heat source. Thereby, it is possible to perform floor heating at a reduced cost without requiring a dedicated heat source for floor heating. Moreover, since the temperature of the remaining hot water in the bath is about 42 ° C. at the highest, the air in the floor interior space 15 is not excessively heated. Therefore, unlike the conventional floor heating system in which the floor material can be at a high temperature, it is not necessary to use a special floor material with improved heat resistance as the floor material, and there is an advantage that the degree of freedom in selecting the floor material is high.

  In addition, in the present embodiment, the heating device 47 used in most homes at low temperatures is used not only for heating the air in the indoor space 60 but also for floor heating. Therefore, by using both the remaining hot water of the bath and the heating device 47, heat sources that are not dedicated heat sources for floor heating, it is possible to efficiently perform floor heating with reduced costs.

  Further, the floor is a double structure floor 10, the heated air is circulated in the floor internal space 15, and the pipe 40 is disposed in the floor internal space 15. A heat insulating portion 30 is provided between the space 55. Therefore, the floor can be warmed with good response in a short time without being deprived of heat by the foundation underfloor space 55 having a large volume or the concrete foundation 50 having a large heat capacity. In addition, since the foundation underfloor space 55 is not warmed, the foundation underfloor space 55 can be prevented from becoming an environment in which pests are easily generated. Further, when the foundation underfloor space 55 is warmed, it is necessary to cut the foundation 50 in various places for air circulation. However, in the present embodiment, such a necessity is not necessary. There is no possibility that the strength of 1 will decrease.

  Next, the result of having measured the temperature change in the building 1 to which the floor heating system of this embodiment is applied is demonstrated using FIG. FIG. 4 is a measurement result when the remaining hot water is circulated from the night to the afternoon of the following day in a state where the heating device 47 and the blower 21 are constantly operated and the temperature of the air inlet of the heating device 47 is maintained at about 38 ° C. is there. The result of measuring the change in the temperature of the floor internal space 15 for 8 days is indicated by a solid line, and the outdoor temperature is indicated by a broken line for comparison. Further, in the figure, the time (around 20:00) at which the circulation of the remaining hot water is started is indicated by an arrow A, and the time (around 14:00) at which the circulation of the remaining hot water is stopped is indicated by an arrow B. In addition, in order to suppress the fall of hot water temperature, hot water is circulated in the state which covered the bathtub 67. FIG.

  It can be seen from FIG. 4 that when the circulation of the remaining hot water in the bath is started, the temperature in the floor internal space 15 rises by 5 to 6 ° C. in a short time. Thereafter, as the temperature of the hot water decreases, the temperature of the floor interior space 15 gradually decreases. However, the temperature of the floor interior space 15 does not rapidly decrease despite the nighttime when the outdoor temperature rapidly decreases. . When the circulation of the remaining hot water was started, the temperature of the hot water was about 40 ° C., but the temperature of the hot water when the circulation was stopped the next day was about 23 ° C.

  In other words, if the amount of remaining hot water is 200 liters, the remaining hot water gives heat of about 3400 kcal somewhere indoors while circulating indoors. And the temperature of the upper floor part 11 which touches a resident's body rises 2 degreeC-3 degreeC about 30 minutes after starting the circulation of remaining hot water, and is 18 degreeC-25 degreeC which is the average temperature of the indoor space 60, and It became equal or better. When floor heating is not performed, the floor feels cold even when the temperature of the indoor space 60 is increased by the heating device, but the floor temperature rises by 2 ° C to 3 ° C, so that it can be comfortably barefoot even in the winter at night. be able to. Since the heat capacity of the building is large, it can be said that it is a great effect to raise the temperature of the floor by 2 ° C. to 3 ° C. without using a dedicated heat source.

  In addition, the pipe for circulating hot water is a limited space inside the double structure floor, and the space between the double structure floor and the foundation floor is sufficiently insulated, Even if hot water is circulated for a long time from the night to the afternoon of the following day, the hot water temperature can be kept at a temperature that can be used for heating of about 23 ° C. or more without greatly decreasing.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, in this embodiment, although the case where it has an atrium space and the duct is standingly arranged there was illustrated, it is not limited to this. For example, it is possible to set up a duct so as to pass through the ceiling of the first floor part, the floor of the second floor part, and the ceiling of the second floor part, with the building having no atrium space. In this case, if it is configured such that the space on each floor is easily ventilated by providing a vent hole or the like, warm air generated in the entire building can be collected in the upper part of the indoor space, and the collected air can be transferred to the floor interior space by a duct. This is preferable because it is possible.

  Furthermore, although the case where only the floor of the first floor part is made into the double structure floor is illustrated, the floor of the second floor part is also made into the double structure floor so that the floor heating of the second floor part can also be configured. it can. In this case, a duct and a blower for pumping air can be separately provided in the floor internal space of the first floor portion and the floor internal space of the second floor portion, respectively.

  Moreover, in said embodiment, although the building 1 of the structure which uses the remaining hot water of a bath and the heating apparatus 47 as a heat source of floor heating was illustrated, it is set as the building 2 of the structure which can further use solar energy as a heat source further. be able to. As shown in FIG. 5, the building 2 includes a roof ventilation space 75 capable of circulating air formed along the roof surface, and a chamber communicating with the roof ventilation space 75 in addition to the above-described configuration of the floor heating system. 81 and a second blower 82 that discharges the air in the chamber 81 to the indoor space 60. In addition, about the structure similar to the building 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  More specifically, the roof of the building 2 is a double structure roof 70 composed of an upper roof 71 and a lower roof 72 that are separated from each other. A space inside the double structure roof 70 is a roof ventilation space 75. The chamber 81 is formed in a box shape at the highest position in the attic space 63, and the periphery is covered with a heat insulating material. The roof ventilation space 75 communicates with the outdoors through the outdoor opening 75a, and communicates with the chamber 81 through the indoor opening 75b.

  A part of the chamber 81 extends in a duct shape, and a second blower 82 is attached to the end of the chamber 81 slightly downward so that the air in the chamber 81 can be discharged toward the indoor space 60. The second blower 82 is a type in which the lid of the blower opening is closed when stopped. Further, a temperature switch (not shown) that detects the temperature in the chamber 81 and switches between operation and stop of the second blower 82 is attached to the inner wall of the chamber 81. The positional relationship among the duct 20, the heating device 47, and the chamber 81 is set so that the upper end of the duct 20 opens near the heating device 47 and opens near the second blower 82.

  By adopting such a configuration, the heating device 47 is used as a heat source for floor heating with remaining hot water as described above during rainy days and nights, while solar energy is used as a heat source during days when the weather is good. Can be used together. That is, when the temperature switch detects that the temperature in the chamber 81 is equal to or higher than a predetermined temperature due to the air in the roof ventilation space 75 heated by sunlight flowing into the chamber 81, the second blower 82. Is activated, and heated air is discharged from the chamber 81 to the indoor space 60. The heated air in the upper part of the indoor space 60 is transferred to the floor interior space 15 through the duct 20 by the blower 21. The air transferred to the floor internal space 15 rises by blowing out from the outlet 17, is mixed with the air newly released from the chamber 81, and is transferred again to the floor internal space 15 through the duct 20.

  In this configuration, the heating device 47 is provided in the upper portion of the indoor space 60, and the upper end of the duct 20 is opened in the upper portion of the indoor space 60, so that warm air that naturally rises can be used for floor heating, and in addition to sunlight. Thus, the air heated in the roof ventilation space 75 can be introduced into the floor internal space 15 through the same duct 20, and solar energy can be used in combination as a heat source for floor heating.

  In addition, when it is not necessary to perform floor heating, such as in summer, air heated by sunlight by communicating the space in the chamber 81 with an outdoor outlet or not communicating the roof ventilation space 75 with the chamber 81. Is not taken into the indoor space 60. In the above embodiment, since the heating device 47 is an air conditioner for cooling and heating, when the temperature is high such as summer, the heating device 47 is cooled by operating the cooling operation with the “enclosure” (not shown) removed. The air naturally descends from a high position. And the low-temperature air which descend | falls is transferred to the upper part of the indoor space 60 via the duct 20 by making the air pumping direction by the air blower 21 reverse with the time of floor heating. In other words, efficient cooling can be performed using equipment for floor heating that is not required in summer.

1, 2 Building 10 Double structure floor 11 Upper floor portion 12 Lower floor portion 15 Floor internal space 17 Air outlet 20 Duct 21 Air blower 30 Heat insulation portion 40 Pipe 41 Outlet 42 Inlet 45 Pump 47 Heating device 55 Base part under floor space 60 Indoor Space 61 First floor space (indoor space)
62 Second floor space (indoor space)
63 Attic space (indoor space)
64 Atrium space (indoor space)
67 Bathtub

Claims (3)

A floor heating system for heating the floor of a building,
A double-structure floor composed of an upper floor portion and a lower floor portion separated from each other, and having a floor interior space inside;
A heat insulating part provided between the double structure floor and the foundation part underfloor space;
A blower that pumps air in an indoor space into the floor internal space;
An outlet for blowing air from the floor interior space into the indoor space;
A pipe disposed in the floor interior space, one end being an outlet from the bathtub and the other end being an inlet to the bathtub;
A floor heating system comprising a pump for circulating hot water between the pipe and the bathtub. A heating device provided in an upper portion of the indoor space;
In the indoor space, further comprising a duct having an upper end opened in the vicinity of the heating device and a lower end connected to the floor interior space,
The floor heating system according to claim 1, wherein the blower pumps air in the indoor space to the floor interior space through the duct. A floor heating method using the floor heating system according to claim 1 or 2,
The remaining hot water in the bath is circulated between the pipe and the bathtub, and heat is exchanged between the remaining hot water through the pipe to heat the air in the interior space of the floor, and the heated air Heating the upper floor portion from the lower surface side, blowing heated air from the outlet to the indoor space, and heating the upper floor portion from the upper surface side while heating the indoor space. .

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