JP2006132899A - Triple ventilation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a triple ventilation system allowing a structural skeleton to hold yield strength for many years without causing dew condensation in the structural skeleton, accelerating heat release in an attic space in summer, and performing efficient indoor air-conditioning with ventilation. <P>SOLUTION: This triple ventilation system is provided with an indoor ventilation system for ventilating indoor spaces 11-16 through an air supply port 17 and an exhaust port 18, and performing air-conditioning at any time; a natural ventilation system for sucking outside air taken into a ventilating layer 19 between an external wall material 5 and a heat insulating layer 4 from the lower part of the external wall material 5, into the attic space 7a and naturally exhausting the outside air together with outside air led into a ventilating layer 22 between a roof board 20 and a heat insulating layer 21 from the eaves side of a roof; and a skeleton ventilation system for allowing outside air controlled in humidity in a closed underfloor space 25, to flow through an internal space 27 of the structural skeleton 2 and exhausting the outside air always forcibly from the exhaust port 18, and allowing air in the skeleton to pass through the heat insulating layer 6 laid at the upper part of the structural skeleton 2, to suck/lead the air into the attic space 7a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a triple ventilation system applied to a highly airtight and highly insulated house, and in particular, performs natural exhaust from a roof and 24-hour ventilation (with air conditioning if necessary), and a structural enclosure. The present invention relates to a triple ventilation system that promotes dehumidification by circulating air to prevent dew condensation in the housing to maintain the durability of the structural housing for a long time, and can efficiently air-condition the room during high temperatures and humidity such as in summer.

Recently, mainly for the energy saving during air conditioning, the tendency of high airtightness and high heat insulation has become prominent even in wooden general houses, and the high airtightness has been achieved by using a heat insulating structure to keep the house airtight.・ Various highly insulated houses have been proposed. For example, a ventilation layer is formed between the heat insulating layer stretched on the outdoor side of the foundation part and the shaft assembly part (structural frame) and the interior material, and the ventilation layer vents indoor air from below to above. There has been proposed a heat insulating wall structure of a building that can suppress condensation in the wall and high humidity in the wall (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-81509

  In the highly airtight and highly heat-insulated houses shown in the above conventional example, a ventilation layer is not formed on the outside of the heat insulation layer, that is, between the heat insulation layer and the exterior material, so condensation is likely to occur between the heat insulation layer and the exterior material. There's a problem. In addition, in order to supply air to the ventilation layer formed between the heat insulation layer and the interior material, a ventilation hole is formed in the lower part of the room. There is also a problem that noise is easily transmitted between the first floor and the second floor.

  In addition, because the indoor air is introduced into the ventilation layer between the heat insulation layer and the interior material from the ventilation opening at the lower part of the room, the air with increased humidity (and temperature) when using a humidifier, cooking rice, cooking, etc. Is introduced into the air-permeable layer as it is, moisture is taken in between the heat insulating layer and the interior material, and a good dew-preventing effect cannot be obtained, and there is a concern that the durability of the structural frame will be lowered.

  The present invention has been made in view of such circumstances, so that the structure housing can be maintained for a long time without causing condensation, and the indoor air conditioning with ventilation can be efficiently performed. The purpose is to provide a triple ventilation system.

(1) The triple ventilation system of the present invention includes a structural housing 2 standing on a foundation 1 provided at least with a waterproof function, a heat insulating function, and earthquake resistance, and laid over the entire plane of the building, and inside the structural housing 2 The interior material 3 to be stretched, the outer wall material 5 to be stretched on the outside of the structural housing 2 via a heat insulating layer 4, and the ventilation device mounted on the upper portion of the structural housing 2 via the heat insulating layer 6 A triple ventilation system applied to a highly airtight and highly insulated house with a roof portion 7 with
An indoor ventilation system having an air supply port 17 and an exhaust port 18 communicating with the indoor spaces 11 to 16 surrounded by the interior material 3, and ventilating the indoor spaces 11 to 16 and air-conditioning at any time;
Outside air taken into a ventilation layer 19 formed between the outer wall material 5 and the heat insulating layer 4 from the lower part of the outer wall material 5 is sucked into the back of the hut 7a, and the outside air is sent to the roof plate 20 from the eaves side of the roof. A natural ventilation system that naturally discharges the air from the ventilation device 23 together with the outside air introduced into the ventilation layer 22 formed between the heat shielding layer 21;
A humidity control material 26 is disposed in an underfloor space 25 formed in a closed shape between the foundation 1 and the floor plate 24, and after taking outside air into the underfloor space 25 and adjusting the humidity, the internal space 27 of the structural housing 2 is provided. The housing ventilation system which is circulated through the exhaust port 18 and is always forcedly discharged to the outside and can be sucked and introduced into the shed 7a at any time through the heat insulating layer 6 laid on the top of the structural housing 2. It is characterized by comprising.

  According to such a configuration, the natural ventilation system naturally ventilates the ventilation layer 19 and the roof portion 7 formed between the outer wall material 5 and the heat insulating layer 4, so that the space between the outer wall material 5 and the heat insulating layer 4 is increased. Moreover, generation | occurrence | production of the dew condensation in the roof part 7 can be prevented, and the indoor space 11-16 is ventilated by the indoor ventilation system, and a comfortable living environment can be prepared by air-conditioning at any time. Then, after the outside air is introduced into the underfloor space 25 and humidity is adjusted by the housing ventilation system, it is circulated through the internal space 27 of the structural housing 2 and is always forcedly discharged from the exhaust port 18 to the outside. Since the outside air (air inside the housing) circulated through the space 27 is forcibly introduced into the cabin 7a, the inside of the structural housing 2 can be sufficiently ventilated to prevent the occurrence of condensation, and the structural housing 2 can be maintained for a long time. Can do. Moreover, VOC (volatile organic compound) in the structural housing 2 can be discharged, and the occurrence of sick house syndrome can also be suppressed.

  In particular, in the summer, the temperature of the cabin back 7a can be lowered by introducing the inside air, which has a temperature lower than the outside air due to cooling, into the cabin back 7a, and thereby the indoor space 11 from the cabin back 7a. The propagation of radiant heat to ˜16 can be suppressed, and the air conditioning efficiency of the room by the room ventilation system can be improved. In other words, not only the outside air conditioned in the underfloor space 25 but also the air inside the conditioned room (inside air) enters the interior space 27 through the interior material 3 and from the stairs and corridors. Therefore, the inside air introduced into the cabin 7a from the inner space 27 is considerably lower than the outside air due to cooling in the summer, as described above, so that the temperature of the cabin 7a can be effectively reduced. Can do. In addition, although there exists a possibility that dew may generate | occur | produce on a shed member by the low-temperature and comparatively low-humidity air introduce | transduced into the shed 7a, it has the function adjusted with the moisture absorption capability of the timber which comprises this shed member. In addition, in the underfloor space 25, in addition to the humidity control material 26, the entire underfloor coating is applied with the Bincho charcoal powder paint, so that the inside of the structural housing 2 is sufficiently ventilated and dried. As described above, condensation occurs. Can be prevented and the ant-proof effect is improved.

(2) It is preferable to form a ventilation opening 28 for taking outside air conditioned from the underfloor space 25 into the internal space 27 of the structural enclosure 2 in a part of the structural enclosure 2 facing the underfloor space 25. In this way, the inside air conditioned in the underfloor space 25 can be easily taken into the internal space 27, and ventilation in the structural housing 2 can be performed efficiently.

(3) A through hole may be formed in the heat insulating layer 6 laid on the top of the structural housing 2, and a ventilation fan 31 that is driven as needed may be provided in the through hole. In this way, the ventilating fan 31 is driven as necessary during the summer season, the rainy season, etc., so that the conditioned air from the upper part of the internal space 27 of the structural housing 2 is sucked up and the cabin is efficiently built. 7a can be forcibly introduced. Further, during cold weather such as in winter, the ventilation fan 31 can be closed to suppress a decrease in air conditioning efficiency, and the inside air in the structure housing 2 can be vented to the outside through the exhaust port 18 so that the inside of the structure housing 2 can be ventilated. .

  The triple ventilation system according to the present invention performs natural ventilation in the roof layer and the ventilation layer formed between the outer wall material and the heat insulating layer by the natural ventilation system, and condensation between the outer wall material and the heat insulating layer and in the roof portion. The indoor ventilation system can ventilate the interior space, and a comfortable living environment can be prepared by air-conditioning as needed. The outside air conditioned in the underfloor space is circulated through the internal space of the structural housing and forcedly discharged from the exhaust port to the outside at the same time, and forcedly introduced into the back of the hut. It is sufficiently ventilated to prevent the occurrence of condensation, and the structural housing can be maintained for a long time. Moreover, the VOC in the structural enclosure can be discharged, and the occurrence of sick house syndrome can also be suppressed. And in summer, the temperature of the shed can be lowered by introducing the air that is lower in temperature than the outside air by cooling into the shed by the enclosure ventilation system, so that the hut can be lowered into the indoor space. It is possible to improve the indoor air conditioning efficiency by the indoor ventilation system by suppressing the propagation of radiant heat.

  Hereinafter, a triple ventilation system according to the best mode of the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual diagram of a triple ventilation system applied to a highly airtight and highly insulated house, FIG. 2 (a) is a sectional view of the floor portion of the second floor of the building, and (b) is a sectional view of the floor portion of the first floor of the building. FIG. 3A is a cross-sectional view of the roof portion in the eaves ridge direction, and FIG. 3B is a cross-sectional view of the roof portion in the row direction. As shown in FIG. 1, this highly airtight and highly insulated house has an indoor ventilation system (the direction of ventilation is indicated by an arrow A) that performs indoor ventilation for 24 hours (with air conditioning if necessary). In addition to a natural ventilation system (the direction of ventilation is indicated by an arrow B) that naturally ventilates the interior and back of the hut, in particular, a frame ventilation system (always indicates the direction of ventilation) C)), and this triple ventilation system can maintain the durability of the structural housing 2 for a long time without causing condensation in the structural housing 2 throughout the year. The room can be efficiently air-conditioned.

  Explaining the whole in detail, this highly airtight and highly insulated house is constructed by laying a foundation 1 with waterproof function, heat insulation function and earthquake resistance over the entire surface of the building, and standing a structural frame 2 on the foundation 1 ing. The foundation 1 is, for example, a solid solid foundation formed by a pressure slab mat slab method. The entire surface of the base concrete 1a is received by a base concrete 1a having a thickness of 150 mm. A moisture-proof sheet material (polyethylene film, etc.) and chestnut stone (about 100 mm thick) are laid below, and polystyrene foam 1b is laid about 50 mm thick as a basic heat insulating material within 900 mm from the rising and outer periphery of the base concrete 1a. At the same time, a humidity control material 26 such as ceramic or carbon is disposed over the entire surface of the base concrete 1a. Furthermore, two coatings (black) with the Bincho charcoal powder paint are performed over the entire surface under the floor including the foundation 1. The height of the rising portion of the foundation 1 from the ground is preferably 350 mm or more. In the present invention, the configuration of the foundation 1 is not limited as described above, and any construction method or configuration may be used as long as it has at least a sufficient waterproof function, heat insulation function, and earthquake resistance.

  Examples of the structural material of the structural frame 2 erected on the foundation 1 include a base 2a, pillars, beams, studs, large draws, bearing walls, floor foundations, floor bundles, etc. 105 × 105), pillars and beams are highly durable laminated wood (through pillars: 120 × 120, pipe pillars: 105 × 105), studs are rice bran laminated wood (105 × 30), and large pulls are firewood (105 × 105) The load bearing wall is composed of a structural plywood (entire outer wall, t12), the floor base is a structural plywood (both on the first and second floors, t28), and the floor bundle is a plastic bundle. A structural plywood 35 is stretched on the outside of the structural housing 2, and further, for example, phenol foam (face material: non-woven fabric) is stretched about 50 mm thick as the heat insulating layer 4 on the outside. Moreover, what used the aluminum foil for the face material can be selected.

  And as shown to FIG. 2 (a) (b), the outer wall material 5 is stretched | stretched through the interposition member on the outer side of the heat insulation layer 4, and it distribute | circulates between the heat insulation layer 4 and the outer wall material 5 up and down. The ventilation layer 19 is formed, and as shown in FIGS. 3A and 3B, the ventilation layer 19 communicates with the cabin back 7a, and the outside air taken into the ventilation layer 19 from the lower part of the outer wall material 5 is transferred to the cabin back 7a. It can be introduced. Thereby, generation | occurrence | production of the dew condensation between the heat insulation layer 4 and the outer wall material 5 and the hut back 7a can be prevented. On the other hand, an interior material 3 such as a plaster board is stretched inside the structural housing 2, and an internal space (outer wall space) 27 a (27) of the structural housing 2 is formed between the interior material 3 and the structural plywood 35. Is done. Further, in the partition portion formed between the pillars and the inter-columns, an internal space (partition space) 27b (27) is also formed between the interior materials 3 and 3 such as plaster boards that are stretched with a predetermined interval.

  On the base 2a mounted on the rising portion of the foundation 1 and the large pull (not shown) installed at a predetermined interval, a structural plywood 36 and a flooring material 37 laid thereon are provided. A floor plate 24 is formed, and a closed underfloor space 25 is formed between the foundation 1 and the floor plate 24. On the other hand, in the second-floor portion, a floor board comprising a structural plywood 36 and a flooring material 37 laid on the beams 38 and 39 that are horizontally mounted on the pillars and the studs at a predetermined interval. 24 is formed, and a ceiling back space 41 is formed between the ceiling 40 and the floor plate 24 (see FIGS. 2A and 2B).

  In particular, in this embodiment, the internal space 27 (27a, 27b) formed between the interior material 3 and the heat insulating layer 4 (including the structural plywood 35) of the structural housing 2 and between the interior materials 3 and 3; The ventilation openings 28 (281 to 284) are formed in order to promote the circulation of the enclosure air between the underfloor space 25 surrounded by the foundation 1 and the floor plate 24, and the ceiling back space 41. Specifically, first, in the first floor portion, as shown in FIG. 2B, a ventilation opening 281 formed in the lower portion of the outer wall is predetermined on the upper surface of the base 2a at the end portion arranged in the direction of the beam. The upper half is covered with the structural plywood 36, but the other half is open toward the internal space 27, so that the underfloor space 25 is formed in a concave shape with an interval of (for example, about 150 mm to 200 mm). And the internal space 27a (27) communicate with each other. Such a vent opening 281 is similarly formed on the upper surface of the base 2b disposed in the eaves-ridge direction. The ventilation opening 282 formed below the partitioning portion is formed in a concave shape on the upper surface of the base 2a arranged in the direction of the row with a predetermined interval (for example, about 150 mm to 200 mm), and has a structure on both sides thereof. Since the end portions of the plywoods 36 and 36 are placed at a predetermined interval and the central portion of the ventilation opening 282 opens toward the internal space 27b (27), the underfloor space 25 and the internal space 27b (27) Communicate. Such a ventilation opening 282 under the partition is similarly formed on the upper surface of the base 2b disposed in the eaves-ridge direction. The upper part of each internal space 27 (27a, 27b) communicates with the ceiling back space 41.

  Next, in the second floor portion, as shown in FIG. 2 (a), the ventilation openings 283 formed at the intermediate height portion of the outer wall have a predetermined interval on the upper surface of the beam 38 at the end portion arranged in the direction of the beam. (For example, about 150 mm to 200 mm) is formed in a concave shape, the upper half is covered with the structural plywood 36, and the other half opens toward the internal space 27a (27). The internal space 27a (27) communicates. Such a vent opening 283 is similarly formed on the upper surface of the beam 39 disposed in the eaves-ridge direction. The ventilation opening 284 formed under the partition is formed in a concave shape with a predetermined interval (for example, about 150 mm to 200 mm) on the upper surface of the beam 38 at the end arranged in the row direction. Since the end portions of the structural plywoods 36 and 36 are placed and the central portion opens toward the internal space 27b, the ceiling space 41 and the internal space 27b (27) communicate with each other. Such a vent opening 284 under the partition is similarly formed on the upper surface of the beam 39 disposed in the eaves-ridge direction. Accordingly, the internal space 27 (27a, 27b) of the structural housing 2 communicates with the underfloor space 25 and the ceiling back space 41. And the upper part of each internal space 27 (27a, 27b) is connected to the ceiling back space 51 of the 2nd floor (refer Fig.3 (a) (b)).

  As shown in FIG. 1, the second floor ceiling space 51 and the first floor ceiling space 41 communicate with the indoor spaces 14 to 16, respectively, through an air supply port 17 and an exhaust port 18 that open to the outdoors. In addition, a duct d is disposed in the duct d so that the enclosure air intake 29 faces the interior space 51 and 41 of the ceiling, and the interior air 27 from the interior space 27 of the structural enclosure 2 is disposed. Can be taken into the duct d and discharged from the exhaust port 18 to the outside. On the other hand, an outside air inlet 30 for sending outside air into the underfloor space 25 is disposed at the lower end of the duct d suspended from the ceiling back space 41 on the first floor so as to face the underfloor space 25. The air supply and exhaust to the indoor spaces 14 to 16 through the air supply port 17 and the exhaust port 18 and the outside air to the underfloor space 25 are electrically operated in the ceiling back spaces 41 and 51 or the outer wall. It is preferable to always carry out forcedly by a ventilation fan (illustration omitted).

  As shown in FIGS. 3 (a) and 3 (b), the roof portion 7 communicates the internal space 27 (27 a, 27 b) of the structural housing 2 with the ceiling back space 51 on the second floor, and is introduced into the ceiling back space 51. The inside air is sucked up to the shed 7a as needed by a ventilation fan 31 provided through the heat insulating layer 6 laid in the boundary between the upper part of the structural skeleton 2 (ceiling space 51) and the shed 7a. At the same time, a ventilation layer 22 is formed between the roof plate 20 and the heat shielding layer 21 stretched on the inside thereof, and infrared energy that could not be absorbed or reflected by the heat shielding layer 21 is taken into the ventilation layer 22, The outside air introduced from the side and the inside air sucked into the shed 7a are configured to be naturally discharged from the ventilator 23 to the outside, and thereby, between the roof plate 20 and the heat shield layer 21 and in the shed 7a. 5 Can prevent the occurrence of condensation . The above-described heat insulating layer 6 is, for example, a material in which phenol foam (for example, 100% (50 mm × 2) thickness double bonded, face material: non-woven fabric) is attached on a structural plywood, and the heat insulating layer is used. In order to eliminate the radiant heat in the cabin 7a in summer, for example, a timer and a sensor (to the extent that the ventilation in the cabin 7a can be ventilated about twice in one hour, for example, in summer, etc. It is preferable that the ventilation fan 31 is driven by an arrangement in the shed 7a.

  In the triple ventilation system provided in the highly airtight and highly insulated house constructed as described above, as shown in FIG. 1, the indoor ventilation system in which the direction of ventilation is indicated by an arrow A is provided with a duct d in the indoor spaces 11-16. The air supply port 17 and the exhaust port 18 communicated with each other through the heat exchange of the air conditioner (air conditioner) ac to perform forced air conditioning (when necessary) with ventilation (always 24 hours) of the indoor spaces 11 to 16. The natural ventilation system in which the direction of ventilation is indicated by an arrow B introduces the outside air taken into the ventilation layer 19 formed between the outer wall material 5 and the heat insulating layer 4 from the lower part of the outer wall material 5 into the shed 7a. The outside air is naturally discharged from the ventilator 23 together with the outside air taken into the ventilation layer 22 formed between the roof plate 20 and the heat shield layer 21 from the eaves side of the roof, and thereby the outer wall material 5 and the heat insulating layer. 4 and the inside of the roof portion 7 (the back of the hut 7a) can prevent the occurrence of condensation. And the frame ventilation system which shows the direction of ventilation by the arrow C takes in outside air from the outside air inlet 30 to the underfloor space 25, adjusts the humidity, introduces it into the internal space 27 of the structural frame 2, and distributes it to the internal space 27. After that, the air is taken into the duct d from the housing air intake 29 and forcedly exhausted from the exhaust 18 to the outside constantly (24 hours), so that the inside of the structural housing 2 is constantly ventilated, and the ventilation fan 31 is used as needed. Then, the inside air is introduced into the cabin 7a.

  In particular, as described above, since the housing ventilation system is linked to the indoor ventilation system, the outside air is taken into the underfloor space 25 and conditioned, and then circulated into the internal space 27 (27a, 27b) of the structural housing 2. Since it can be forcedly discharged from the rear exhaust port 18 to the outside at all times (24 hours), the inside of the structural housing 2 is sufficiently ventilated throughout the year to effectively prevent the occurrence of condensation and to maintain the long-term durability of the structural housing 2. In addition, the VOC in the structural body can be discharged to suppress the occurrence of sick house syndrome. And in summer, etc., if necessary, the temperature of the cabin 7a can be lowered by introducing into the cabin 7a the indoor air whose temperature is lower than the outside air by air conditioning in the room. The propagation of radiant heat from the cabin back 7a to the indoor spaces 11 to 16 can be suppressed, the air conditioning efficiency by the indoor ventilation system can be improved, and an excellent energy saving effect can be obtained. In addition, in the underfloor space 25, in addition to the humidity control material 26, the entire underfloor coating is applied with the Bincho charcoal powder paint, so that the inside of the structural housing 2 is sufficiently ventilated and dried. Can be prevented and the ant-proof effect is improved.

  By the way, not only the inside air conditioned in the underfloor space 25 but also the interior air 3 enters the interior space 27 through the interior material 3 and from the stairs and the corridor. Since there is also heat transfer to the internal space 27 through the material 3, in the summer season when the cooling is performed, as described above, the inside air introduced from the internal space 27 into the shed 7 a has a temperature higher than the outside air. It becomes quite low. Thereby, as above-mentioned, the temperature in the cabin back 7a can be reduced effectively, the fall of the energy-saving effect at the time of the air conditioning by ventilation can be suppressed, and the air-conditioning efficiency of an indoor ventilation system can be improved. Further, not only in summer, but also in the rainy season or when the rainfall continues to increase, the ventilation fan 31 is driven as necessary to promote ventilation in the structural chassis 2, thereby providing the structural chassis 2. It is possible to prevent the occurrence of condensation on the inside and the back of the shed 7a and to improve the air conditioning efficiency of the indoor ventilation system.

  Note that the triple ventilation system of the present invention is not limited to the embodiment, and can be freely modified and improved as necessary without departing from the spirit of the invention. -The highly insulated house may be a three-story or one-story house, and is not limited to a wooden house, and may be a reinforced concrete house. Further, the ventilation method may not be the first type ventilation but may be the third type ventilation. Further, for example, the ventilation fan 31 may be controlled to operate when a humidity detection sensor is provided in the internal space 27 of the structural housing 2 so that the humidity of the internal space 27 becomes a predetermined level or more. Then, maintenance-free may be achieved by turning the on / off manually.

It is a conceptual diagram of the triple ventilation system which concerns on embodiment of this invention. (A) is sectional drawing of the floor part of the building 2nd floor, (b) is sectional drawing of the floor part of the building 1st floor. (A) is sectional drawing of the eaves ridge direction of the roof part, (b) is sectional drawing of the roof part in the direction of a row.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Foundation, 2 ... Structural frame, 3 ... Interior material, 4 ... Heat insulation layer, 5 ... Outer wall material, 6 ... Heat insulation layer, 7 ... Roof part, 11-16 indoor space, 17 ... Air supply port, 18 ... Exhaust port , 19 ... Ventilation layer, 20 ... Roof plate 21 ... Heat shield layer, 22 ... Ventilation layer, 23 ... Ventilation device, 24 ... Floor board, 25 ... Underfloor space, 26 ... Humidity control material, 27 ... Internal space, 28 ... Ventilation opening 29 ... Air intake in the enclosure, 30 ... Outside air inlet, 31 ... Ventilation fan

Claims (3)

A structural frame (2) erected on the foundation (1) laid over the entire plane of the building with at least a waterproof function, a heat insulating function and an earthquake resistance, and an interior stretched inside the structural frame (2) A material (3), an outer wall material (5) stretched outside the structural housing (2) via a heat insulating layer (4), and a heat insulating layer (6) above the structural housing (2). A triple ventilation system applied to a highly airtight and highly insulated house with a ventilation device (7) with a ventilation device,
The air supply port (17) and the exhaust port (18) communicate with the indoor space (11-16) surrounded by the interior material (3), and the indoor space (11-16) can be ventilated and air-conditioned at any time. An indoor ventilation system,
The outside air taken into the ventilation layer (19) formed between the outer wall material (5) and the heat insulating layer (4) is sucked into the cabin back (7a) from the lower part of the outer wall material (5), and the outside air is sucked out. A natural ventilation system for naturally venting outside from the ventilator (23) together with outside air introduced into the ventilation layer (22) formed between the roof plate (20) and the heat shield layer (21) from the roof eave side; ,
A humidity control material (26) is disposed in the underfloor space (25) formed in a closed shape between the foundation (1) and the floor board (24), and outside air is taken into the underfloor space (25) to control the humidity. After that, it is circulated through the internal space (27) of the structural housing (2) and forcedly discharged from the exhaust port (18) to the outside at all times, and a heat insulating layer (6) laid on the upper portion of the structural housing (2) is provided. A triple ventilation system, comprising: a housing ventilation system that is penetrated and can be sucked and introduced into the shed (7a) at any time.   A vent opening for taking outside air conditioned from the underfloor space (25) into the internal space (27) of the structural enclosure (2) in a part of the structural enclosure (2) facing the underfloor space (25). 28. The triple ventilation system according to claim 1, wherein 28) is formed.   The through hole is formed in the heat insulation layer (6) laid in the upper part of the said structural frame (2), The ventilation fan (31) driven at any time by this through hole was provided, The ventilation fan (31) characterized by the above-mentioned. Triple ventilation system.

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