JP2009127927A - Underfloor heating structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underfloor heating structure capable of uniformly heating a underfloor space without remarkably increasing equipment cost, and having a dehumidifying function. <P>SOLUTION: In this underfloor heating structure, a radiator 11 is disposed in the underfloor space 2, an air supply/exhaust fan 15 is disposed in a position rather closer to the outer periphery in the underfloor space 2 separate from the arrangement position of the radiator 11, and a duct 16 is provided taking the vicinity of the arrangement position of the air supply/exhaust fan 15 as an inlet and the vicinity of the radiator 11 as an outlet. An air intake duct 18 is provided at the air supply side of the air supply/exhaust fan 15. An outdoor duct 25 is provided in the periphery of a living room 21, an inlet 25b of the outdoor duct 25 is placed near the radiator 11, an outlet 25a is placed at the air supply side of the air supply/exhaust fan 15. A dehumidifier 19 is provided in the underfloor space 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an underfloor heating structure capable of realizing a reasonable warm air flow when heating using an underfloor space.

  Techniques have been proposed in which warm air is circulated in the underfloor space of a building to heat the floor or the floor and the interior of the building. For example, in the technique described in Patent Document 1, a hot water circulation circuit is configured between a heat pump installed outdoors and an underfloor heat exchanger installed in an underfloor space, and a plurality of ducts connected to the underfloor heat exchanger are provided. It arrange | positions so that it may reach each division divided by the partition foundation. And by blowing out from the warm air outlet of each duct to each section of the underfloor space, the warm air can spread over the entire first floor underfloor space of the building and be warmed.

  Moreover, the technique described in Patent Document 2 installs a heat pump air conditioner including a hot air blowing duct in an underfloor space, which is a closed space, and convects the hot air blown from the duct outlet to the underfloor space. The indoor space can be heated. In this technology, in order to promote the convection of warm air, an auxiliary fan consisting of a small fan or the like is disposed in the opening formed in the foundation beam in the underfloor space, and by driving this auxiliary fan, It is configured to forcibly convect warm air in the underfloor space.

  In addition, the technique described in Patent Document 3 constitutes a sealed underfloor and provides a large number of through holes communicating with the underfloor and the underfloor in the floor material, heats the external air and supplies warm air to the underfloor space, It is configured such that it can be supplied onto the floor surface from the through hole of the floor material.

JP 2007-078324 A JP 2007-051859 A JP 11-193936 A

  The technology described in each of the above patent documents realizes floor heating of a building by supplying warm air to the underfloor space and circulating it. However, even these techniques are not yet completed and have some problems to be solved.

  That is, in each of the above technologies, warm air generated from a warm air generation source such as an underfloor heat exchanger or a heat pump air conditioner is blown out through the duct. There is a problem in that unevenness in the temperature is apt to occur due to the circulation of the route in which the portions are continuous.

  In particular, when there is a partition foundation in the underfloor space, the warm air flows through a vent formed in the partition foundation, but this vent serves as a resistance element and hinders preferable warm air circulation. For this reason, in the technique described in Patent Document 2, an auxiliary fan is installed in the vent hole, and there is a problem that the equipment cost and the running cost tend to be high.

  In addition, moisture tends to be accumulated in the underfloor space during the rainy season or summer, but the technology described in each of the above patent documents does not have the idea of dehumidifying the underfloor space.

  An object of the present invention is to provide an underfloor heating structure capable of heating an underfloor space without unevenness and having a dehumidifying function without significantly increasing equipment costs.

  In order to solve the above problems, an underfloor heating structure according to the present invention has a heating source arranged in an underfloor space and an intake / exhaust fan at a position near the outer periphery in the underfloor space separated from the arrangement position of the heating source. And an air passage having an inlet near the arrangement position of the intake and exhaust fans and an outlet near the heating source is provided.

  In the underfloor heating structure, a second air passage is provided on the intake side of the intake / exhaust fan, and the inlet of the second air passage is arranged on the floor plate side of the underfloor space and on the outer periphery with respect to the arrangement position of the intake / exhaust fan. Preferably, a third air passage is provided around the living room, the inlet of the third air passage is in the vicinity of the heating source, and the outlet is on the intake side of the intake / exhaust fan. Preferably, there is further provided a second air passage having an entrance on the floor plate side of the underfloor space and a position closer to the outer periphery with respect to the arrangement position of the intake / exhaust fan, and an outlet on the intake side of the intake / exhaust fan. It is preferable to provide a third air passage which is provided around and has an inlet near the heating source and an outlet on the intake side of the intake and exhaust fans.

  In any of the above underfloor heating structures, it is preferable to provide a dehumidifying facility in the underfloor space.

  In the underfloor heating structure according to the present invention, the intake / exhaust fan is disposed at a position near the outer periphery that is separated from the heating source disposed in the underfloor space, the position where the intake / exhaust fan is disposed as an inlet, and the vicinity of the heating source as an outlet. Since the air passage is provided, the air sucked by the intake / exhaust fan disposed near the outer periphery of the underfloor space can be exhausted to the vicinity of the heating source through the air passage. For this reason, underfloor heating can be realized by performing heat exchange by blowing cold air near the outer periphery of the underfloor space to the heating source.

  Also, when a second air passage is provided on the intake side of the intake / exhaust fan, and the inlet of the second air passage is located on the floor plate side of the underfloor space and closer to the outer periphery with respect to the arrangement position of the intake / exhaust fan The air can be taken in through the second air passage provided on the intake side of the intake / exhaust fan disposed near the outer periphery and exhausted to the vicinity of the heating source through the air passage. For this reason, in the underfloor space, since the atmospheric pressure is the lowest at the arrangement position of the intake and exhaust fans and the atmospheric pressure is the highest near the heating source, it is possible to ensure a reliable pressure gradient regardless of the presence or absence of resistance in the middle. . Therefore, the warm air generated by the heating source can be sucked by the intake / exhaust fan to ensure a reliable flow, and the temperature distribution can be made as uniform as possible.

  Also, a third air passage is provided around the living room, the inlet of the third air passage is located near the heating source, and the outlet is the intake side of the intake / exhaust fan. Can be sucked by the intake / exhaust fan, and the air pressure on the heating source side can be relatively increased by lowering the pressure of the intake / exhaust fan in the third air passage. For this reason, warm air flows into the third air passage from the heating source and is exhausted to the intake / exhaust fan side, and the living room is heated by the warm air flowing through the third air passage provided around the living room. can do.

  Further, a second air passage is provided on the floor plate side of the underfloor space and closer to the outer periphery with respect to the position of the intake / exhaust fan, and the outlet is on the intake side of the intake / exhaust fan, and around the living room. By providing a third air passage that is provided near the heating source and has an outlet at the intake side of the intake / exhaust fan, a warm air flow in the underfloor space is secured using the second air passage, Heating of the living room can be realized using the third air passage.

  Further, when a dehumidifying facility is provided in the underfloor space, it is possible to ensure a dry state by dehumidifying the air flowing through the underfloor space. In this case, it is possible to dehumidify regardless of whether the heating source is operated or not, and a comfortable underfloor space can be realized even in the rainy season or in the summer when the humidity is high.

  The present inventor has been developing to realize a reasonable underfloor heating structure without temperature unevenness without significantly increasing the equipment cost. As a result of a series of experiments in the course of this development, the following knowledge was obtained. First, the contents and results of this experiment will be briefly described.

  An experimental building of an ordinary house with an underfloor with an area of about 7m x 4m without vents is built, and a radiator with a heat dissipation capacity of about 2.9KW (2500kcal / h) is installed under this floor, and the outer circumference under the floor A sirocco fan was installed at a close position, and the sirocco fan and the vicinity of the radiator were connected by a duct. The intake side of the sirocco fan was opened to the underfloor space and the exhaust side was connected to the duct.

  When the sirocco fan is driven by installing the radiator, the sirocco fan, and the duct as described above, the air existing in the underfloor space is sucked into the sirocco fan and released in the vicinity of the radiator through the duct. And temperature rises by heat exchange with a radiator. Since the sirocco fan is installed near the outer periphery under the floor, the air flows toward the vicinity of the sirocco fan and constitutes a series of cycles.

  Set the temperature of the radiator to 35 ° C and perform continuous operation for 5 days (April 11th to 15th) to continuously measure the temperature at multiple locations in the underfloor space to show the tendency of temperature change In addition to observing, the change of the outside temperature was continuously measured to observe the tendency of the temperature change. Then, the tendency of temperature and change in the underfloor space and the change and tendency of outside air temperature were compared and examined.

  As a result, the outside air temperature showed a waveform (wave shape like a sine curve) in which the nighttime was low and the daytime was high, and the maximum temperature tended to rise day by day (the maximum temperature on the first day was about 20 ° C, The maximum temperature on the fourth day is about 27 ℃). As the maximum temperature increased day by day, the minimum temperature also tended to increase daily (the minimum temperature on the first day was about 10 ° C and the maximum temperature on the fourth day was about 12 ° C). .

  The temperature of the underfloor space was not affected by the temperature change of the day when the outside air temperature was low at night and increased during the day, but showed a tendency to be influenced by the tendency of the outside air temperature to rise daily. That is, the temperature in the center under the floor was about 26 ° C. on the first day and about 28 ° C. on the fourth day. However, the temperature under the floor was almost uniform regardless of changes in the outside air temperature during the day. Became. Depending on the position under the floor, there was a slight difference with respect to the temperature at the center of the floor, but the tendency of temperature change was almost the same as that of the center of the floor.

  As a result of the experiment as described above, the present invention has been made. Hereinafter, preferred embodiments of the underfloor heating structure according to the present invention will be described. The underfloor heating structure of the present invention has a heating source installed in the underfloor space, an intake / exhaust fan installed near the outer periphery of the foundation of the building, and an air passage having the intake / exhaust fan side as an inlet and the heating source side as an outlet. By providing the air in the underfloor space, the air flow from the heating source side to the intake / exhaust fan side can be secured by sucking the air present in the underfloor space.

  As described above, by arranging the intake / exhaust fan near the outer periphery of the foundation of the building, there is a case where there is a partition foundation having an opening (ventilation opening) between the intake / exhaust fan and the heating source. Even if it exists, it is possible to ensure the flow of air reliably.

  A first embodiment of the underfloor heating structure will be described with reference to the drawings. FIG. 1 is a plan view of the underfloor for explaining the underfloor heating structure according to the first embodiment. FIG. 2 is a schematic cross-sectional view under the floor.

  As shown in FIG. 1, an outer periphery foundation 1 is formed along the outer periphery of the building, and an underfloor space 2 is formed inside the outer periphery foundation 1. Moreover, the partition foundation 3 is formed in the preset position on the inner side of the outer periphery foundation 1, and the underfloor space 2 forms a plurality of sections 2a to 2i) by the partition foundation 3.

  In addition, a beam 4 is disposed at a predetermined position in the underfloor space 2 across the outer peripheral foundation 1 and the partition foundation 3. This beam 4 supports the upper floor 5 and does not have a function of partitioning the underfloor space 2.

  A heat insulating material 6 is provided on the entire surface of the outer peripheral foundation 1 on the outdoor side.

  Further, the partition base 3 is formed with at least one ventilation port 3a (opening), and adjacent spaces communicate with each other through the ventilation port 3a, so that the underfloor space 2 is a single communication space. It is configured.

  A radiator 11 serving as a heating source is disposed at a preset position in the underfloor space 2. The location of the radiator 11 in the underfloor space 2 is not particularly limited, and may be substantially in the center of the underfloor space 2 or even at a position close to the outer peripheral foundation 1 as shown in FIG. good.

  The structure of the radiator 11 serving as a heating source is not particularly limited, and may be a radiator configured to exchange heat with air existing in the underfloor space 2. Further, the source of heat energy supplied to the radiator 11 is not particularly limited, and a hot water heater for heating water using surplus power or a hot water heater for heating water by burning fuel such as gas or kerosene. Furthermore, it is possible to selectively use a device such as a geothermal water heater that heats water by heat exchange with geothermal heat.

  In the present embodiment, a hot water heater 12 using surplus power is used as a heat energy generation source, the hot water heater 12 is installed outdoors, and the radiator 11 is arranged in the section 2a at the corner of the underfloor space 2. Both are connected by a hot water supply pipe 13a and a drain pipe 13b.

  The intake / exhaust fan 15 is disposed at a position close to the outer peripheral foundation 1. The number of intake / exhaust fans 15 to be arranged is not particularly limited, and may be one or more. In particular, when the floor area of a building is large, it is preferable to arrange a plurality of intake and exhaust fans 15. The structure of the intake / exhaust fan 15 is not particularly limited, and any structure that can intake and exhaust a sufficient amount of air can be employed. In this embodiment, a sirocco fan is employed as the intake / exhaust fan 15.

  In the present embodiment, in the underfloor space 2, two intake / exhaust fans 15 are arranged in the sections 2 c and 2 f, and are respectively installed in the vicinity of the outer peripheral foundation 1.

  An inlet of a duct 16 serving as an air passage is connected to an exhaust side of the intake / exhaust fan 15, and passes through a ventilation port 3 a formed in the partition foundation 3 at a portion where the partition foundation 3 exists, and an outlet is a radiator 11. It is arranged to face. Therefore, the cross-sectional dimension of the duct 16 is smaller than the dimension of the ventilation port 3a.

  An intake duct 17 is connected to the intake side of the intake / exhaust fan 15 so as to penetrate the outer periphery foundation 1 and communicate with the outside air. In addition, an intake branch 18 serving as a second air passage is connected in the middle of the intake duct 17 between the intake / exhaust fan 15 and the outer peripheral foundation 1, and the intake branch 18 opens into the underfloor space 2. Yes. As described above, the supply / exhaust fan 15 is connected between the air passage (duct 16) and the second air passage (intake branch 18) so that the air supplied and exhausted does not leak, thereby improving the supply / exhaust efficiency. It is increasing.

  A dehumidifier 19 is installed at a predetermined position in the underfloor space 2 (in the vicinity of the intake / exhaust fan 15 in this embodiment). The dehumidifier 19 removes moisture from the air flowing through the underfloor space 2, and the humidity of the air flowing through the underfloor space 2 is kept low by installing the dehumidifier 19. Is possible. For this reason, it becomes possible to improve the habitability of a building.

  An operation panel 12 a for operating the water heater 12, an intake / exhaust fan 15, and an operation panel 15 a for operating the dehumidifier 19 are arranged inside the living room 21, and underfloor heating and dehumidification can be remotely performed from the inside of the living room 21. It is configured to be operable.

  In the underfloor heating structure configured as described above, when each of the operation panels 12a and 15a is operated to operate the water heater 12, the intake / exhaust fan 15 and the dehumidifier 19, hot water is generated between the water heater 12 and the radiator 11. Circulate. Thereby, the air around the radiator 11 is heated.

  On the other hand, with the operation of the intake / exhaust fan 15, the air in the sections 2 c and 2 f in which the intake / exhaust fan 15 is disposed is sucked in through the intake branch 18 and blown out toward the radiator 11 through the duct 16. At the same time, outside air is also taken in from the intake duct 17, but the intake duct 17 is provided with a gallery 17 a that serves as a resistance, and the intake air amount is set to be a slight amount.

  As the air in the sections 2c and 2f is sucked by the intake / exhaust fan 15 and blown out toward the radiator 11, the air pressure in the sections 2c and 2f is reduced. The air pressure rises when air flows into the section 2 a where the radiator 11 is disposed through the duct 16.

  For this reason, the level of atmospheric pressure is generated between the sections 2c and 2f and the section 2a, and the sections 2a to 2b-2d-2c, 2b-2g-2h-2c are pointed out as indicated by arrows in FIG. And a flow from the section 2a toward the sections 2e-2f, 2b-2e-2f, and 2b-2g-2f.

  As described above, in the underfloor space 2, an air flow is ensured in all the sections except for the section 2i, and it is possible to realize good underfloor heating. In this way, it is possible to ensure air circulation in the underfloor space 2 without installing a special fan or the like, and the equipment cost is not increased.

  Further, by installing the dehumidifier 19 in the underfloor space 2, it becomes possible to dehumidify the air flowing through the underfloor space 2, and by providing dry air regardless of the season, comfortable living can be achieved. It is possible to secure.

  In addition, the duct 16 is inserted in the ventilation port 3a formed between the division 2b and the division 2c, and the ventilation port 3a formed between the division 2b and the division 2f. Can not be demonstrated. For this reason, it is possible to realize a better air flow.

  Next, a second embodiment of the underfloor heating structure will be described with reference to the drawings. FIG. 3 is a schematic sectional view of a building for explaining the underfloor heating structure according to the second embodiment. FIG. 4 is a view for explaining the state of blowing out warm air in the second floor portion. In the figure, the same parts as those in the first embodiment and the parts having the same functions are denoted by the same reference numerals and the description thereof is omitted.

  In the present embodiment, in addition to the underfloor heating structure of the first embodiment described above, an indoor duct 25 serving as a third air passage is disposed around the living room (rooms 21 and 22 on the first floor). The indoor duct 25 is configured to rise in one wall surface 23a of the first floor living rooms 21, 22 and pass through the ceiling 24 and through the other wall surface 23b. Therefore, the indoor duct 25 is arranged so as to surround the surroundings of the first floor living rooms 21 and 22.

  The indoor duct 25 is connected to the intake duct 17 of the intake / exhaust fan 15 whose outlet 25 a is disposed in the vicinity of the outer peripheral foundation 1 in the underfloor space 2, and the radiator 11 in which the inlet 25 b is disposed in the underfloor space 2. It is arrange | positioned in the vicinity of and is open | released in this position.

  In particular, the indoor duct 25 is connected to a heating skirting board 26 provided in the rooms 31 to 33 on the second floor in the plane of the ceiling 24 on the first floor. It is comprised so that it can heat through the baseboard 26.

  Note that the heating baseboard 26 does not blow out air (warm air) flowing through the indoor duct 25 but performs heat exchange with surrounding air by the warm air flowing through the indoor duct 25.

  In the underfloor heating structure configured as described above, in addition to underfloor heating on the first floor, the first floor rooms 21 and 22 can be heated from the surroundings, and the heating baseboards of the second floor rooms 31 to 33 can be heated. It is possible to realize floor heating of the respective rooms 31 to 33 via the H.26.

  In the underfloor heating structure according to the present invention, the intake / exhaust fan 15 is disposed in the vicinity of the outer periphery foundation, that is, at a position near the outer periphery, and the air sucked by the intake / exhaust fan 15 is blown out toward the radiator 11 through the duct 16. Even when the partition foundation 3 exists between the intake / exhaust fan 15 and the radiator 11, it is possible to ensure a reliable air flow through the vent 3 a of the partition foundation 3. For this reason, it is possible to realize heating without temperature unevenness by using it as underfloor heating of a building, which is advantageous.

  Furthermore, by arranging the indoor duct 25 around the living room from under the floor, it is possible to realize floor heating on the second floor in addition to underfloor heating, which is advantageous as a heating structure of a building.

It is a top view under the floor explaining the underfloor heating structure concerning the 1st example. It is a schematic cross section under the floor. It is a schematic cross section of the building explaining the underfloor heating structure which concerns on 2nd Example. It is a figure explaining the blowing state of the warm air in the 2nd floor part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer periphery foundation 1a Ventilation opening 2 Under floor space 2a-2i Partition 3 Partition foundation 3a Ventilation opening 4 Beam 5 Floor 6 Heat insulating material 11 Radiator 12 Water heater 12a Operation panel 13a Hot water supply pipe 13b Drain pipe 15 Intake / exhaust fan 15a Operation panel 16 Duct 17 intake duct 17a gallery 18 intake branch 19 dehumidifier 21, 22 living room 23a, 23b wall surface 24 ceiling 25 indoor duct 25a outlet 25b inlet 31-33 living room

Claims (5)

A heating source is arranged in the underfloor space, an intake / exhaust fan is arranged at a position near the outer periphery in the underfloor space separated from the arrangement position of the heating source, and the vicinity of the arrangement position of the intake / exhaust fan is used as an inlet; An underfloor heating structure provided with an air passage having an outlet in the vicinity of the heating source. A second air passage is provided on the intake side of the intake / exhaust fan, and the inlet of the second air passage is located on the floor plate side of the underfloor space and at a position near the outer periphery with respect to the arrangement position of the intake / exhaust fan. The underfloor heating structure according to claim 1. The underfloor according to claim 1, wherein a third air passage is provided around the living room, an inlet of the third air passage is set near the heating source, and an outlet is an intake side of the intake / exhaust fan. Heating structure. A second air passage is provided on the floor plate side of the underfloor space and closer to the outer periphery with respect to the position of the intake / exhaust fan, and the outlet is provided on the intake side of the intake / exhaust fan, and is provided around the living room. The underfloor heating structure according to claim 1, further comprising a third air passage having an inlet near the heating source and an outlet on an intake side of the intake / exhaust fan. The underfloor heating structure according to any one of claims 1 to 4, wherein a dehumidifying facility is provided in the underfloor space.

Images