JP2015203547A - Ventilation equipment of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide ventilation equipment of a building capable of performing a preferable ventilation at a garret without arranging any ventilation device at the garret.SOLUTION: A collective housing 10 has a ground floor part 11 and a second floor part 12. The second floor part 12 has a plurality of second floor dwellings 16 arranged side-by-side. The second floor dwellings 16 comprise dwelling spaces 23 to 25 and a garret space 48 arranged above the dwelling spaces. The second floor dwellings 16 have ventilation devices 41 at the garret of a bath room 25. The ventilation device 41 has a discharging fan 46 in it. To the ventilation devices 41 are connected discharging ducts 42 communicated with the outdoor area. Upon actuation of the discharging fan 46, air in the bath room 25 is discharged out to the outside area through the discharging ducts 42. To the ventilation devices 41 are connected garret ducts 61 communicating with the garret space 48. Air in the garret space 48 is guided to the ventilation devices 41 through the garret ducts 61.

Description

  The present invention relates to a building ventilation system.

  In a building such as a house, ventilation is performed in the attic in order to prevent hot air and moisture from staying in the attic (the attic) (see, for example, Patent Document 1). The roof portion is provided with a ventilation port that communicates the attic and the outside, and the attic is ventilated through the ventilation port. Further, attic ventilation is generally performed by natural convection caused by a temperature difference, a pressure difference, or the like.

JP 2008-285914 A

  However, in the above-described configuration in which attic ventilation is performed using natural convection, there is a possibility that ventilation cannot be performed properly in an environment where natural convection is unlikely to occur, such as when the temperature difference is small or the pressure difference is small. is there.

  It is also conceivable to provide a ventilator such as a fan in the attic and forcibly ventilate the attic with the ventilator. However, in that case, there is a risk of inconvenience such as an increase in cost due to the installation of the ventilator.

  This invention is made | formed in view of the said situation, and it aims at providing the ventilation equipment of the building which can ventilate an attic suitably, without providing a ventilator in an attic. .

  In order to solve the above problems, a ventilation system for a building of the first invention is applied to a building having an attic space above a living space, and is provided in an exhaust passage that leads from the living space to the outside, and the exhaust passage. And an exhaust device for exhausting air in the living space to the outside through the exhaust passage, wherein the exhaust passage is connected to an attic passage leading to the attic space, and the attic The air in the space is guided to the exhaust passage through the attic passage.

  According to the present invention, the air in the living space is discharged to the outdoors through the passage by the exhaust device (for example, the exhaust fan) provided in the exhaust passage. Further, an attic passage leading to the attic space is connected to the exhaust passage, and air in the attic space is guided to the exhaust passage through the attic passage. In this case, the air in the attic space led to the exhaust passage is then discharged to the outside together with the air in the living space through the exhaust passage. Here, in the exhaust passage, since an air flow directed to the outdoors is generated by the exhaust device, the air in the attic space can be actively guided (drawn) to the exhaust passage using the air flow, and as a result The air in the attic space can be actively discharged outdoors. For this reason, the attic can be suitably ventilated even in an environment where natural convection is unlikely to occur. Also, because the attic is ventilated using ventilation equipment (exhaust passage and exhaust system) that ventilates the living space, the attic can be suitably used without providing a ventilator such as a fan in the attic. Can be ventilated.

  In a building ventilation system according to a second aspect of the present invention, in the first aspect, the attic passage is connected to the exhaust passage upstream of the exhaust device in the direction of air flow in the exhaust passage caused by the exhaust device. It is characterized by.

  According to the present invention, the attic passage is connected to the exhaust passage upstream of the exhaust device in the air flow direction in the exhaust passage (in other words, the suction side of the exhaust device). And can be directly drawn into the exhaust passage by the exhaust device. In this case, the air in the attic space can be more actively guided to the exhaust passage, and can be discharged outdoors. Therefore, the attic can be ventilated more suitably.

  The ventilation equipment for a building according to a third invention is the first or second invention, wherein the exhaust passage has an air intake port set in one of a bathroom, a washroom or a toilet as the living space. The exhaust device takes air from the bathroom, the washroom or the toilet into the exhaust passage through the intake, and discharges the air to the outdoors through the exhaust passage. Is connected to the exhaust passage.

  Generally, in a building such as a house, ventilation for 24 hours is required. When performing 24-hour ventilation, ventilation facilities (exhaust passages, exhaust devices) provided in bathrooms, washrooms, or toilets are often used. Therefore, in the present invention, focusing on this point, ventilation of the attic space is performed using such ventilation equipment. In this case, it can be said that it is a practically preferable configuration because the attic ventilation using the ventilation facility can be performed at all times.

  According to a fourth aspect of the present invention, there is provided the building ventilation system according to any one of the first to third aspects, wherein the building is a collective housing having a plurality of dwelling units arranged side by side, and each dwelling unit has the living space. And in the roof portion of the apartment house, the attic spaces of the respective dwelling units are arranged side by side and are separated from each other by a boundary wall, and for each living space of each dwelling unit, An exhaust passage and the exhaust device are provided, and the attic passage is provided for each attic space of each dwelling unit.

  In an apartment house, since the attic space of each dwelling unit is partitioned by a boundary wall, it is necessary to ventilate each attic space of each dwelling unit. Therefore, when forced ventilation is performed by providing a ventilator such as a fan in the attic, it is necessary to provide a ventilator for each attic space of each dwelling unit, which may cause a significant increase in cost. In that respect, in the present invention, an attic passage is provided for each attic space of each dwelling unit, and air in the attic of each dwelling unit is discharged to the outdoors by the exhaust device through each attic passage. Therefore, it is possible to suitably ventilate the attic of each dwelling unit without providing a ventilator for each attic space of each dwelling, that is, while avoiding an increase in cost associated with the installation of such a ventilator.

  The building ventilation system according to a fifth aspect of the present invention is the ventilation system according to the fourth aspect, wherein the roof portion is provided with an outside air intake for taking in outdoor air into the attic space of each dwelling unit. The entrance is arranged on one side of the attic space in the attic space of the dwelling unit in a direction perpendicular to the direction in which the dwelling units are arranged, and the attic passage has an opening at the end of the attic passage in the plan view. It is opened on the other side in the orthogonal direction in the attic space.

  In the above-described configuration in which the attic space of each dwelling unit is partitioned by the boundary wall, the outside air intake for taking outdoor air into the attic space of each dwelling unit is either side of the direction orthogonal to the dwelling unit arrangement direction in the attic space It is difficult to secure only. Therefore, in this embodiment, in the attic space of each dwelling unit, an outside air intake is set on one side in the orthogonal direction, and a passage end opening of the attic passage is set on the other side. In this case, outdoor air is taken into the attic space from one side (outside air intake port) in the orthogonal direction, and the air is discharged from the other side (passage end opening) in the same direction to the outside of the attic space. . Therefore, outdoor air can be passed over the entire region in the orthogonal direction in the attic space, and the attic space can be ventilated over a wide range.

  The building ventilation system according to a sixth aspect of the present invention is that, in the fifth aspect, the apartment house is provided with an outer wall so as to surround the living space of each dwelling unit, and the exhaust passage is provided in the apartment house. It extends toward the outer wall disposed on the other side in the orthogonal direction and is connected to an exhaust port provided in the outer wall, and the attic passage is connected to the exhaust passage. And

  In a housing complex provided side by side and a plurality of dwelling units, it is assumed that each dwelling unit (specifically, its living space) can secure only two outer walls. That is, in such an apartment house, there are cases where adjacent dwelling units are arranged on two of the four sides of the dwelling units, in which case the outer walls are set only on the other two sides, that is, in the direction (both sides) orthogonal to the dwelling unit arrangement direction. . In such a configuration, the exhaust passage is extended to one of the two outer walls in the orthogonal direction, and air is discharged to the outdoors from the discharge port provided in the outer wall.

  Under such circumstances, in the present invention, the attic passage of the fifth invention, that is, the passage end opening is set on the other side (that is, the side opposite to the outside air intake port) in the direction orthogonal to the dwelling unit arrangement direction in the attic space. The constructed attic passage is connected to an exhaust passage extending toward an outer wall disposed on the other side in the orthogonal direction (that is, the side having the passage end opening). In this case, since the length of the attic passage can be made relatively short, the effect of the fifth invention can be obtained while simplifying the handling of the attic passage.

  According to a seventh aspect of the present invention, there is provided the building ventilation system according to the sixth aspect, wherein the apartment house extends along a direction in which the dwelling units are arranged and includes a common corridor that leads to the dwelling units. The roof portion is provided adjacent to the outer wall provided with an exhaust port, and the roof portion has a roof overhanging portion projecting above the common corridor. An attic space on the hallway is formed, the attic space on the shared hallway extends along the shared hallway, is adjacent to the attic space of each dwelling unit, and the roof portion includes the A fireproof wall is provided to partition the attic space of each dwelling unit from the attic space on the common corridor.

  In an apartment house, the spread of fire between the dwelling units through the attic is generally prevented by the boundary wall that partitions the attic space of each dwelling unit. Also, in apartment houses with a shared corridor, the roof part extends over the common corridor, so the spread of the attic spreads to the common corridor via the overhanging part (roof overhanging part). May spread to other dwelling units. Therefore, in the present invention, in view of this point, a refractory wall portion is provided between the attic space of each dwelling unit and the attic space on the common corridor formed in the roof overhanging portion. In this case, it is possible to prevent the spread of the fire to the attic space on the common corridor, and thus the spread to the common corridor. Therefore, it is possible to prevent the spread of fire to other dwelling units through the common corridor. Therefore, the fireproof performance can be improved.

  Further, in such a configuration, it is difficult to guide outdoor air taken into the attic to the attic space on the common corridor, so the taken air is discharged from the attic space toward the common corridor (and outdoors). It ’s difficult. In this respect, in the present invention, as described above, since the taken-in air is discharged to the outside through the attic passage and the exhaust passage, the attic space of each dwelling unit is preferably ventilated even if the fireproof wall portion is provided. can do. Therefore, in this case, the attic of each dwelling unit can be suitably ventilated while improving the fire prevention performance.

(A) is a front view which shows the external appearance of an apartment house, (b) is a top view which shows the 2nd floor part of an apartment house. The schematic longitudinal cross-sectional view which shows the whole apartment complex. The cross-sectional view which shows a roof part. The longitudinal cross-sectional view which shows the ventilation equipment periphery of a second-floor dwelling unit.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The building of this embodiment is embodied as a two-story apartment house (for example, an apartment) having a plurality of dwelling units. 1A is a front view showing the appearance of an apartment house, and FIG. 1B is a plan view showing a second floor portion of the apartment house.

  As shown in FIG. 1A, an apartment house 10 includes a first floor portion 11 as a lower floor portion, a second floor portion 12 as an upper floor portion, and a roof portion 13 disposed above the second floor portion 12. Is provided. The first floor portion 11 is provided with a plurality of dwelling units 15 (hereinafter referred to as first-floor dwelling units 15) side by side, and specifically, three first-floor dwelling units 15 are provided side by side. Similarly, a plurality of dwelling units 16 (hereinafter referred to as second-floor dwelling units 16) are provided side by side on the second-floor portion 12, and specifically, three second-floor dwelling units 16 are provided side by side.

  The collective housing 10 is provided with a common unit used when entering and exiting each of the dwelling units 15 and 16. In the present embodiment, the common section is provided on the north surface side of the apartment house 10. As the common part, the first floor corridor lower part 17 provided in the first floor part 11, the second floor corridor lower part 18 provided in the second floor part 12, and the stair part 19 that connects the first floor corridor lower part 17 and the second floor corridor lower part 18. There is. The first floor corridor 17 communicates with the first floor dwelling units 15 and extends along the direction in which the first floor dwelling units 15 are arranged. The second-floor corridor 18 communicates with each second-floor dwelling unit 16 and extends along the direction in which the second-floor dwelling units 16 are arranged. The direction in which the respective first-floor dwelling units 15 are arranged and the direction in which the respective second-floor dwelling units 16 are arranged are the same direction, and hereinafter, this direction is also referred to as a dwelling unit arranging direction.

  As shown in FIG. 1B, an outer wall portion 29 is provided on the outer peripheral portion of the apartment house 10. The outer wall portion 29 is provided so as to surround the dwelling units 15 and 16 from four directions. Specifically, as the outer wall portion 29, an outer wall portion 29a is provided on the north side of the apartment house 10, an outer wall portion 29b is provided on the west side, an outer wall portion 29c is provided on the south side, and an outer wall portion 29d is provided on the east side. Yes. Of the outer wall portions 29a to 29d, the outer wall portions 29b and 29d on the west side and the east side are provided on both sides of the dwelling unit arrangement direction in the apartment house 10, and the outer wall surfaces face the same direction. Further, the outer wall portions 29a and 29c on the north side and the south side are provided on both sides in a direction orthogonal to the dwelling unit arrangement direction in the apartment house 10, and the outer wall surfaces face the same direction. Further, the outer wall portion 29a on the north side is provided to face the first floor corridor lower portion 17 and the second floor corridor lower portion 18, and partitions between the corridor lower portions 17 and 18 and the dwelling units 15 and 16.

  In the second-floor portion 12, adjacent second-floor dwelling units 16 (specifically, living spaces) are partitioned from each other by a boundary wall 28 (door boundary wall). The boundary wall 28 includes a gypsum board having excellent fire resistance. The boundary wall 28 ensures fire resistance between the second-floor dwelling units 16. In addition, although illustration is abbreviate | omitted, the same boundary wall is provided also between the 1st floor dwelling units 15 mutually.

  Each second-floor dwelling unit 16 includes an entrance 21, a corridor 22, an LDK 23, a Japanese-style room 24, a bathroom 25, a washroom 26, and a toilet 27 as living spaces. The entrance 21 communicates with the second-floor lower part 18 through an entrance 31 provided in the outer wall portion 29a. Thereby, the entrance and exit from the second floor corridor lower portion 18 to the second floor dwelling unit 16 can be entered and exited. A front door 32 is provided at the front door 31. Moreover, among each living space 21-27, the washroom 26 and the toilet 27 are provided adjacent to the outer wall part 29a.

  In addition, although illustration is abbreviate | omitted, the floor plan of the 1st floor dwelling unit 15 is basically the same as the floor plan of the 2nd floor dwelling unit 16, and more specifically, the floor plan of the second floor dwelling unit 16 is symmetrical with the layout of the dwelling units.

  The apartment house 10 is provided with ventilation equipment for ventilating the dwelling units 15 and 16 for each dwelling unit 15 and 16. Hereinafter, such a ventilation facility will be described with reference to FIG. FIG. 2 is a schematic longitudinal sectional view showing the entire apartment house 10.

  As shown in FIG. 2, in each dwelling unit 15 and 16, a bathroom 25 is formed by a bath unit (bathroom unit). The bus unit is formed in a box shape having a wall portion, a ceiling portion, and a floor portion, and is formed by incorporating a bathtub or the like therein. A bathroom 25 is formed by the internal space of the bus unit. In the bathroom 25, the ceiling part 34 (the ceiling part of the bus unit) is provided at a position lower than the normal (normal height) ceiling part 35, which is a so-called falling ceiling.

  A ventilation facility 40 is provided behind the ceiling of the bathroom 25. The ventilation facility 40 includes a ventilation device 41 that discharges the air in the bathroom 25 to the outside. The ventilation device 41 is installed in an upper space of the ceiling portion 34 of the bathroom 25, specifically, a space between the ceiling portion 34 of the bathroom 25 and the ceiling portion 35 above (hereinafter referred to as a ceiling back space 36).

  An exhaust duct 42 extending toward the outer wall portion 29a is connected to the ventilation device 41. The exhaust duct 42 is inserted into a hole 45 formed in the outer wall portion 29a, and is connected to an exhaust grill 43 provided on the outer wall surface of the outer wall portion 29a (the surface on the second floor corridor lower portion 18 side) in the inserted state. . Further, a suction grill 44 provided on the ceiling portion 34 of the bathroom 25 is connected to the ventilation device 41. The exhaust grille 43 corresponds to the exhaust port, and the suction grille 44 corresponds to the intake port.

  The ventilation device 41 has an exhaust fan 46 inside. The exhaust fan 46 is a blower such as a propeller fan or a sirocco fan. The exhaust fan 46 corresponds to an exhaust device. When the exhaust fan 46 is operated, the air in the bathroom 25 is taken into the ventilation device 41 from the suction grill 44, and the taken-in air is guided to the exhaust grill 43 through the exhaust duct 42. Then, the guided air is discharged from the exhaust grill 43 to the lower part of the second floor corridor 18 and thus to the outdoors. In this way, ventilation of the bathroom 25 and thus ventilation of the dwelling units 15 and 16 (residence space) is performed. In the present embodiment, the ventilation device 41 is always operated, whereby ventilation is performed for 24 hours.

  By the way, in this embodiment, it is supposed that the attic of the apartment house 10 is further ventilated using the ventilation equipment 40 mentioned above. The present embodiment has a feature in that point, and hereinafter, such a characteristic configuration will be described with reference to FIGS. 3 and 4 in addition to FIG. 3 is a transverse sectional view showing the roof portion, and FIG. 4 is a longitudinal sectional view showing the vicinity of the ventilation facility 40 of the second-floor dwelling unit 16.

  As shown in FIGS. 2 and 3, the roof portion 13 of the apartment house 10 is a side-by-side roof, and an attic space 48 (attic space) of each second-floor dwelling unit 16 is formed on the roof portion 13. ing. The attic space 48 of each second-floor dwelling unit 16 is formed above the living spaces 21 to 27 of each second-floor dwelling unit 16. In this case, in each second-floor dwelling unit 16, the attic space 48 and the living spaces 21 to 27 are vertically adjacent to each other with the (normal) ceiling portion 35 therebetween.

  The attic space 48 of each second-floor dwelling unit 16 is arranged side by side in the dwelling unit arrangement direction. Adjacent attic spaces 48 are separated from each other by a boundary wall 49. The boundary wall 49 is arranged so as to be lined up and down with the boundary wall 28 that partitions the living spaces 21 to 27 of the adjacent second-floor dwelling units 16. Similar to the boundary wall 28, the boundary wall 49 includes a gypsum board having excellent fire resistance. The fire barrier performance between the attic spaces 48 of the adjacent second-floor dwelling units 16 is ensured by the boundary wall 49.

  The roof part 13 has an eaves part 13a projecting outward from the outer wall part 29a. The eaves part 13a is provided so as to cover the second floor corridor lower part 18 from above. In addition, the eaves part 13a is corresponded to a roof overhang | projection part. In the eaves part 13a, an attic space 51 is formed above the second floor corridor lower part 18. The attic space 51 extends along the lower part of the second-floor hall 18 and is adjacent to the attic space 48 of each second-floor dwelling unit 16.

  The attic space 51 is partitioned by the attic space 48 and the partition wall 52 of each second-floor dwelling unit 16. The partition wall portion 52 extends over the entire boundary portion between each attic space 48 and the attic space 51 and is connected to each boundary wall 49. The partition wall portion 52 is arranged so as to line up and down with the outer wall portion 29a, and the wall surface of the partition wall portion 52 and the wall surface of the outer wall portion 29a are parallel to each other. The partition wall portion 52 is configured to include a gypsum board having excellent fire resistance performance, like the boundary walls 28 and 49. The partition wall portion 52 ensures fire resistance between the attic spaces 48 and 51. The partition wall portion 52 corresponds to a fire wall portion.

  Next, a configuration for ventilating the attic space 48 of each second-floor dwelling unit 16 will be described.

  The outer wall portion 29 c of the apartment house 10 has an outer wall surface material 56 and an inner wall surface material 57 that face each other. A vent passage 55 extending vertically is formed between the wall materials 56 and 57. The lower end portion of the ventilation passage 55 is open to the outdoors, and the upper end portion thereof communicates with the attic space 48 of each second-floor dwelling unit 16. Thereby, outdoor air is taken into each attic space 48 through the ventilation passage 55.

  Specifically, the upper end of the ventilation passage 55 is an opening that opens into the attic space 48 of each second-floor dwelling unit 16, and the opening is an intake for taking outdoor air into each attic space 48. 55a (corresponding to an outside air intake). The intake port 55a extends across the attic space 48 of each second-floor dwelling unit 16, and outdoor air is taken into the attic space 48 from the common intake port 55a. In addition, the intake port 55a is set on the south side in the attic space 48, in other words, is set on one side in a direction orthogonal to the dwelling unit arrangement direction. The intake port 55a may be provided individually for each attic space 48.

  Next, a configuration for discharging the air taken into the attic space 48 to the outside will be described.

  As shown in FIG. 4, the ventilation device 41 has a main body portion 41a composed of a rectangular parallelepiped chamber, and an exhaust fan 46 is disposed inside the main body portion 41a. The exhaust fan 46 is disposed on the exhaust duct 42 side in the main body 41a. In this case, an exhaust passage 50 is formed by the main body portion 41a (internal space thereof) and the exhaust duct 42 (internal passage thereof), and the exhaust passage 50 leads from the bathroom 25 to the second floor corridor lower portion 18 (and thus outdoors). ing.

  An attic duct 61 that communicates with the attic space 48 of the second-floor dwelling unit 16 is connected to the ventilation device 41 (main body portion 41a). The attic duct 61 is connected to the opposite side of the main body portion 41a from the exhaust duct 42 side. In this case, the attic duct 61 is connected to the main body 41a on the upstream side (in other words, the suction side of the exhaust fan 46) in the direction in which air flows in the main body 41a.

  The attic duct 61 is bent upward in the middle thereof and extends toward the attic space 48. Specifically, the attic duct 61 extends from the ceiling space 36 to the attic space 48 through a hole 62 formed in the ceiling portion 35. The ceiling portion 35 is made of a gypsum board having fire resistance, and is supported by a plurality of field edges 59 provided thereabove.

  An incombustible material 63 such as glass wool is provided on the outer periphery of the attic duct 61 in the hole 62. The incombustible material 63 is provided so as to surround the outer peripheral surface of the attic duct 61 and closes the gap between the inner peripheral surface of the hole 62 and the outer peripheral surface of the attic duct 61. Thereby, the fire spread through the said clearance gap can be suppressed.

  An opening 61 a that opens toward the attic space 48 is formed at the upper end of the attic duct 61. The opening 61a is located on the north side in the attic space 48. In other words, the opening 61a is located on the other side in the direction orthogonal to the dwelling unit arrangement direction, that is, on the side opposite to the intake port 55a side. An attic passage is formed by the attic duct 61. Further, the opening 61a corresponds to the passage end opening of the attic passage.

  According to the configuration described above, when outdoor air is taken into the attic space 48 of the second-floor dwelling unit 16 through the ventilation passage 55 of the outer wall portion 29 c, the taken-in air is exhausted from the attic space 48 through the attic duct 61 to the ventilation facility 40. It is guided to the duct 42 (in other words, the exhaust passage 50) (see FIGS. 2 and 4). And the air guide | induced to the exhaust duct 42 is discharged | emitted outside through the duct 42 with the air of the bathroom 25 (as a result, living space 21-27). Further, since an air flow toward the outdoors by the exhaust fan 46 is generated in the exhaust duct 42 (and thus the exhaust passage 50), the air in the attic space 48 is actively guided to the exhaust duct 42 by the air flow. (Drawn) and eventually discharged to the outdoors.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  By connecting the attic duct 61 leading to the attic space 48 of the second-floor dwelling unit 16 to the ventilation equipment 40, specifically the ventilation device 41 (main body portion 41a), the air in the attic space 48 is exhausted through the attic duct 61 through the exhaust passage 50 in the ventilation equipment 40. I tried to lead to. In this case, as described above, the air in the attic space 48 can be actively guided to the exhaust passage 50 by using the air flow directed to the outdoors generated by the exhaust fan 46 in the exhaust passage 50, and thus discharged to the outdoors. Can do. Therefore, the attic space 48 can be suitably ventilated even in an environment where natural convection is unlikely to occur. Further, since the attic space 48 is ventilated using the ventilation facility 40 for ventilating the bathroom 25 (and thus the living spaces 21 to 27), a ventilation device such as a fan is not provided in the attic space 48 separately. Also, the attic space 48 can be suitably ventilated.

  The attic duct 61 is connected to the ventilation facility 40 (specifically, the ventilation device 41) on the upstream side of the exhaust fan 46 in the air flow direction in the ventilation facility 40 (exhaust passage 50) (in other words, the suction side of the exhaust fan 46). Since it is connected, the air in the attic space 48 can be directly drawn into the exhaust passage 50 by the exhaust fan 46 through the attic duct 61. In this case, the air in the attic space 48 can be more actively guided to the exhaust passage 50 and can be discharged outdoors. Therefore, the attic space 48 can be ventilated more suitably.

  An attic duct 61 was connected to a ventilation facility 40 (exhaust passage 50) in which a suction grill 44 as an air intake port was set in the bathroom 25. Since the ventilation facility 40 for the bathroom 25 is used for 24-hour ventilation, in this case, the attic space 48 using the ventilation facility 40 can be constantly ventilated. Therefore, it can be said that it is a practically preferable configuration in performing attic ventilation using ventilation equipment.

  Ventilation equipment 40 (ventilator 41 and exhaust duct 42) is provided for each living space 21 to 27 of each second-floor dwelling unit 16 provided side by side in the apartment house 10, and an attic duct 61 is provided for each attic space 48 of each second-floor dwelling unit 16. Provided. In this case, the air in the attic space 48 of each second-floor dwelling unit 16 is exhausted to the outside by the exhaust fan 46 via each attic duct 61. Therefore, the attic spaces 48 can be suitably ventilated without providing a ventilation device such as a ventilation fan for each attic space 48. Thereby, the attic of each two-story dwelling unit 16 can be ventilated suitably, avoiding the remarkable cost increase accompanying installation of the ventilation apparatus in each attic space 48. FIG.

  An intake 55a for taking outdoor air into the attic space 48 of each second-floor dwelling unit 16 is set on one side (specifically, the south side of the house) in the direction perpendicular to the dwelling unit arrangement direction in the attic space 48, and the attic duct 61 The opening 61a is set on the other side (specifically, the north side of the house) in the orthogonal direction in the attic space 48. In this case, outdoor air is taken into the attic space 48 from one side (intake port 55a) in the orthogonal direction, and the air is discharged from the other side (opening 61a) in the same direction to the outside of the attic space 48. Is done. Therefore, outdoor air can be passed over the entire region in the orthogonal direction in the attic space 48, and the attic space 48 can be ventilated over a wide range.

  In the apartment house 10 in which the plurality of dwelling units 15 and 16 are provided side by side, at least the middle dwelling units 15 and 16 among the dwelling units 15 and 16 can ensure only two outer wall portions 29. That is, in the dwelling units 15 and 16, the outer wall portions 29a and 29c are set only in the direction (both sides) orthogonal to the dwelling unit arrangement direction. In such a configuration, the ventilation equipment 40 (exhaust duct 42) is extended to one of the outer wall portions 29a and 29c of the outer wall portions 29a and 29c in the orthogonal direction, and the exhaust grill provided on the outer wall portions 29a and 29c. From 43, air is discharged to the outside.

  Under such circumstances, in the above-described embodiment, the attic duct 61 having the opening 61a set on the other side in the direction perpendicular to the dwelling unit arrangement direction in the attic space 48 (that is, the side opposite to the intake port 55a) is provided. The ventilating equipment 40 (exhaust passage 50) extends toward the outer wall portion 29a disposed on the other side in the orthogonal direction (that is, the side having the opening 61a). In this case, since the length of the attic duct 61 can be made relatively short, the attic space 48 can be ventilated over a wide range while simplifying the handling of the attic duct 61.

  At the eaves portion 13a projecting above the second floor corridor lower portion 18 in the roof portion 13, an attic space 51 on the second floor corridor lower portion 18 is formed. The attic space 51 extends along the second corridor lower portion 18 and each second floor dwelling unit. Adjacent to 16 living spaces 21-27. And in this structure, the roof part 13 was provided with the partition wall part 52 which has the fire resistance performance which partitions off the attic space 48 of each second-floor dwelling unit 16 and the attic space 51 on the second-floor lower part 18. Thereby, it is possible to prevent the spread of fire from the attic space 48 of the second-floor dwelling unit 16 to the attic space 51 on the second-floor lower part 18, and the spread of fire spreads from the attic space 51 to the other second-floor dwelling unit 16 through the second-floor lower part 18. Can be prevented. Therefore, the fireproof performance can be improved.

  Further, in such a configuration, it is difficult to guide outdoor air taken into the attic space 48 to the attic space 51, so the taken air is directed from the attic space 51 to the lower second floor corridor 18 (and outdoors). Difficult to discharge. In this regard, in the above-described embodiment, since the taken-in air is discharged to the outside through the attic duct 61 and the ventilation facility 40 (exhaust passage 50), even if the partition wall portion 52 is provided, The attic space 48 of each second-floor dwelling unit 16 can be suitably ventilated. Therefore, in this case, the attic of each second-floor dwelling unit 16 can be suitably ventilated while improving the fire prevention performance.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  (1) In the above embodiment, the attic duct 61 is connected to the ventilation device 41 (main body 41a). However, the attic duct 61 may be connected to the exhaust duct 42 by changing this. Even in that case, the air in the attic space 48 can be actively guided to the exhaust duct 42 by the air flow flowing through the exhaust duct 42 and can be actively discharged outdoors. Therefore, ventilation of the attic space 48 can be suitably performed.

  (2) In the above embodiment, the attic space 48 is ventilated by using the ventilation facility 40 for the bathroom 25. However, the attic space 48 is ventilated by using the ventilation facility provided in the washroom 26 and the toilet 27. May be performed. Ventilation equipment for the washroom 26 and the toilet 27 is often used for 24-hour ventilation as well as for the bathroom 25. In this case, the attic space 48 is always ventilated using the ventilation equipment. Is possible.

  Moreover, you may ventilate the attic space 48 using the ventilation equipment provided in other living spaces, such as the ventilation equipment provided in the kitchen.

  (3) In the above embodiment, the opening 61 a of the attic duct 61 is set on the side opposite to the intake port 55 a in the direction perpendicular to the dwelling unit arrangement direction in the attic space 48, but the opening 61 a in the attic space 48 is The position is not necessarily limited to this. For example, the opening 61 a of the attic duct 61 may be set on the same side as the intake port 55 a in the orthogonal direction in the attic space 48.

  (4) In the above embodiment, the attic duct 61 is connected to the ventilation facility 40 in which the exhaust grille 43 is provided on the outer wall portion 29a on the north side, in other words, the ventilation facility 40 in which the exhaust passage 50 extends toward the outer wall portion 29a on the north side. However, this may be changed. For example, the attic duct 61 may be connected to a ventilation facility in which the exhaust grille 43 is provided in the south outer wall portion 29c, in other words, a ventilation facility in which the exhaust passage extends toward the south outer wall portion 29c. Moreover, since the exhaust grille 43 can be provided in the west side outer wall part 29b or the east side outer wall part 29d about the second-floor dwelling unit 16 of each two-story dwelling unit 16, an attic duct is added to the ventilation equipment which has this exhaust grille 43. 61 may be connected.

  (5) In the above embodiment, the ventilation system of the present invention is applied to the apartment house 10 in which the three dwelling units 15 and 16 are provided side by side. However, two or more dwelling units 15 and 16 are provided side by side. The present invention may be applied to other apartment houses.

  Moreover, in the said embodiment, although this invention was applied to the two-story dwelling unit 16 in the two-story apartment house 10, for example, this invention is applied to the first-story dwelling unit in a one-story apartment house, or a three-story apartment house. The present invention may be applied to a third-floor dwelling unit. In short, the present invention can be applied to any dwelling unit on the top floor and having an attic.

  Furthermore, in the said embodiment, the apartment was assumed as the apartment house 10, and this invention was applied to the apartment, However, You may apply this invention to apartment houses other than an apartment, such as an apartment. Moreover, you may apply this invention to buildings other than apartment houses, such as a detached house.

  DESCRIPTION OF SYMBOLS 10 ... Apartment house as a building, 13 ... Roof part, 13a ... Eaves part as a roof overhang part, 16 ... Second-floor dwelling unit as a dwelling unit, 18 ... Lower part of the second-floor corridor as a common corridor, 25 ... Bathroom, 29a-29d ... Outer wall part as outer wall, 40 ... ventilation equipment, 42 ... exhaust duct, 46 ... exhaust fan as exhaust device, 48 ... attic space, 50 ... exhaust passage, 51 ... attic space, 52 ... partition wall part as fire wall 55a ... intake port as an outside air intake port, 61 ... attic duct.

Claims (7)

Applies to buildings with attic space above the living space,
An exhaust passage leading from the living space to the outside;
A ventilation system for a building, provided in the exhaust passage and provided with an exhaust device that exhausts air in the living space to the outside through the exhaust passage,
An attic passage leading to the attic space is connected to the exhaust passage,
The building ventilation system according to claim 1, wherein air in the attic space is guided to the exhaust passage through the attic passage.   2. The building ventilation system according to claim 1, wherein the attic passage is connected to the exhaust passage upstream of the exhaust device in a direction of air flow in the exhaust passage generated by the exhaust device. . In the exhaust passage, the air intake port is set in one of the bathroom, the washroom, and the toilet as the living space,
The exhaust device takes air of the bathroom, the washroom or the toilet into the exhaust passage through the intake port, and discharges it to the outside through the exhaust passage.
3. The building ventilation system according to claim 1, wherein the attic passage is connected to the exhaust passage. The building is a collective housing comprising a plurality of dwelling units arranged side by side,
Each dwelling unit has the living space and the attic space,
In the roof portion of the apartment house, the attic spaces of the respective dwelling units are arranged side by side and are separated from each other by a boundary wall,
The exhaust passage and the exhaust device are provided for each living space of each dwelling unit,
The ventilation system for a building according to any one of claims 1 to 3, wherein the attic passage is provided for each attic space of each dwelling unit. The roof portion is provided with an outside air intake for taking outdoor air into the attic space of each dwelling unit,
The outside air intake port is arranged on one side in a direction perpendicular to the direction in which the dwelling units are arranged in the attic space of the dwelling unit in plan view,
5. The building ventilation system according to claim 4, wherein the attic end of the attic passage is opened on the other side in the orthogonal direction in the attic space of the dwelling unit in plan view. . The collective housing is provided with an outer wall so as to surround the living space of each dwelling unit,
The exhaust passage extends toward an outer wall disposed on the other side in the orthogonal direction in the apartment house, and is connected to an exhaust port provided in the outer wall,
6. The building ventilation system according to claim 5, wherein the attic passage is connected to the exhaust passage. The housing complex extends along the direction in which the dwelling units are arranged, and includes a shared corridor that leads to the dwelling units.
The shared corridor is provided adjacent to the outer wall provided with the exhaust port,
The roof portion has a roof bulge projecting above the shared corridor,
An attic space on the shared corridor is formed in the roof overhang part,
The attic space on the common hallway extends along the common hallway and is adjacent to the attic space of each dwelling unit,
The building ventilation system according to claim 6, wherein the roof portion is provided with a fireproof wall portion that partitions the attic space of each dwelling unit and the attic space on the common hallway.

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