JP4143511B2 - Indoor installation structure of intake pipe and indoor installation structure of exhaust pipe - Google Patents

Description

  The present invention relates to a mounting structure for providing an intake pipe or an exhaust pipe in a room.

Inside the building room, there are unpleasant odors such as human body odors, cigarette smoke, cooking odors, and moisture. In particular, with the recent aging of society, the increase in bad odors in the rooms is progressing. Also, a bad odor is generated in the toilet. For this reason, it is necessary to ventilate indoor air to the outside.
In newly built condominiums and the like, harmful substances such as formaldehyde, which are the cause of so-called sick houses, remain and must be discharged to the outside for ventilation.

  In order to ventilate the air inside the room, conventionally, an air intake pipe having a circular cross section is generally used in the space behind the ceiling, and the air in the room is drawn from the air intake port provided on the ceiling by the air intake pipe. It is discharged outside the building.

  However, since air containing odorous substances has a high specific gravity and accumulates in the lower part of the room, it is difficult for the air in the room to be discharged to the outside from the air inlet provided in the ceiling.

  An object of the present invention is to solve such problems and to provide an attachment structure in which an intake pipe or an exhaust pipe can be attached indoors.

In order to achieve the above object, in the present invention,
An air intake pipe or an exhaust pipe having a hollow cross section and a substantially right triangle shape is attached along a joint between two orthogonal wall surfaces in the room, and an air intake or exhaust port is provided on the front plate or the lower end surface so that indoor air can be discharged outside It is characterized by the fact that the air is exhausted or the outdoor air is exhausted indoors.

  In this way, an intake pipe or an exhaust pipe having an intake port or an exhaust port is provided in the room along the joint between the two wall surfaces in the room without interfering with the outside, and the air is sucked in from the lower part of the room and outside. Or the outside air can be discharged to the lower part of the room.

  Therefore, for example, after the renovation work, the intake pipe or the exhaust pipe can be provided in the room without obstruction, and intake or exhaust can be performed at a desired position such as the lower part of the room.

  In the present invention, an intake pipe or an exhaust pipe having a substantially triangular cross section is provided at a corner portion of a room that is not normally used, and intake or exhaust is performed at the lower or middle part of the room.

1 to 3 show an embodiment of the present invention.
In the figure, 1 is a flooring of a room, 2 is a ceiling material, and 3 and 4 are wall surfaces orthogonal to each other.
An intake pipe 10 that forms a right-angled triangle having a hollow cross section in the vertical direction along the joint portion (corner portion) C between the two wall surfaces 3 and 4 orthogonal to each other is above the flooring 1 (or the upper surface of the floor 1). ) Through the ceiling material 2 to a height reaching the ceiling space 5.

  As shown in FIG. 2, the triangular tube-shaped intake pipe 10 includes first and second back plate plates 11 and 12 that are orthogonal to each other and a front plate 13 that is a band plate. .

  For example, the first and second back plates 11 and 12 are integrally formed, and the front edges 13a and 12a of the first and second back plates 11 and 12 are connected to both ends of the front plate 13 in the lateral direction. It can be attached by appropriate means such as screwing or fitting.

  Accordingly, at the time of renovation, for example, as shown in FIG. 3, the joint (corner portion) C of the ceiling material 2 above the joint C of the two wall surfaces 3 and 4 orthogonal to each other is cut out in the same right triangle shape as the intake pipe 10. The upper end of the first and second back plates 11 and 12 is inserted so as to enter the ceiling space 5 through the hole 2a by a predetermined length, and the first and second back plates 11 are provided. , 12 are fixed to the wall surfaces 3, 4 by appropriate means such as screwing or bonding.

  Then, the upper end of the strip-shaped front plate 13 is made to enter upward from the hole 2a in accordance with the first and second back plates 11 and 12, and the front surfaces of the first and second back plates 11 and 12 are covered. The both ends of the front plate 13 in the horizontal direction are attached to the front edge portions 11a and 12a of the first and second back plates 11 and 12 by appropriate means such as screwing or fitting. In FIG. 2, fitting holes 11 b and 12 b are provided in the front edge portions 11 a and 12 a of the first and second back plates 11 and 12, respectively, and protrusions 13 a and 13 b are provided on the back surfaces at both lateral ends of the front plate 13. The projections 13a and 13b are shown fitted in the fitting holes 11b and 12b.

  The first and second back plates 11 and 12 and the front plate 13 may be integrated in advance and attached to the joint (corner portion) C by bonding the first and second back plates 11 and 12. Good.

  The front plate 13 is provided with an intake port 14 at an appropriate position such as a lower or middle portion or an upper portion in the vertical direction. It is desirable to attach a mesh-like filter (not shown) so that dust does not flow into the intake port 14.

  In addition, a wall sheet (not shown) may be adhered to the surface of the front plate 13 (except for the air inlet 14) so as to be integrally covered with the surface of the adjacent walls 3 and 4 or may be painted. In this case, the intake pipe 10 looks like a part of the indoor wall surface.

In the ceiling back space 5, the upper end of the intake pipe 10 is connected to a cylindrical pipe 30 arranged in the ceiling back space 5 by a connecting elbow pipe 20 shown in FIG.
That is, the connecting elbow tube 20 is provided with a right triangle portion 21 and a cylindrical portion 22 at both ends, and the right triangle portion 21 is inserted into the upper end of the intake pipe 10 (or the upper end of the intake pipe 10 is inserted). The cylindrical portion 22 is inserted into the pipe 30 (or inserted into the cylindrical portion 22).

The other end of the pipe 30 communicates with a hole in a building outer wall or a partition wall (not shown), and air from the pipe 30 is discharged to the outside by a fan (not shown).
Accordingly, the air in the room is discharged to the outside through the pipe 30 from the intake port 14 of the intake pipe 10 such as the lower part, the hollow part, and the upper part of the corner part of the room.

  The intake pipe 10 has been described above. However, since the intake pipe can be used as an exhaust pipe with the same configuration as described above, the description of the attachment of the exhaust pipe is omitted.

  In other words, if air from the outside is sent from the pipe 30 to the exhaust pipe side by the fan, the outside air will flow from the exhaust port of the front plate of the exhaust pipe provided at the indoor joint (corner portion) C to the room. It is discharged inside.

  Therefore, for example, air from an air conditioner (not shown) can be sent into the pipe 30 and cold air or warm air can be sent into the room from the exhaust port of the exhaust pipe.

FIG. 5 shows a case where the intake pipe 10 is attached to one corner portion of a narrow room R such as a toilet.
If the exhaust pipe 40 is provided at the other corner, the air resistance in the sealed space is not affected when the door 50 is opened or closed.

  As shown in FIG. 6, a hole 60 a is provided in the wall surface of the room or the partition wall 60, and a hole 61 is provided in either the first or second back plate 11, 12 of the intake pipe 10. The air in the room may be discharged to the outside from 60a. In this way, it is not necessary to make the hole 2a in the ceiling material 2. This also applies to the exhaust pipe.

The embodiment of the present invention has been described above. However, the configuration of the present invention is not limited to the configuration of the above-described embodiment, and various modifications can be made. For example, as shown in FIG. The lower end of the intake pipe 10 may be located above the flooring 1 and the intake port 16 may be provided in the lower end surface 15 of the intake pipe 10. Of course, both the lower end surface 15 and the front plate 13 may be provided with intake ports 16 and 14, respectively.
This also applies to the exhaust pipe, and an exhaust port may be provided on the lower end surface of the exhaust pipe.

  Further, the intake pipe 10 shown in FIG. 2 is provided with first and second back plates 11 and 12 in the form of strips orthogonal to each other as shown in FIG. 8 and first and second back plates 11 and 12. The back plate 17 to be connected may be configured to have a substantially trapezoidal cross section. This also applies to the exhaust pipe.

  Further, when the intake pipe 10 is structured as shown in FIG. 8, the space between the indoor joint (corner part) C and the back plate 17 of the intake pipe 10 is used as shown in FIGS. 9 and 10. The intake pipe 10 can be attached as follows.

  That is, the first locking member 70 is fixed to the wall surfaces 3 and 4 of the joint portion (corner portion) C. The first locking tool 70 includes two side plates 72 and 73 that are perpendicular to each other on both sides of a flat plate 71, and a locking piece 74 is provided by cutting and raising the flat plate 71. Both side plates 72 and 73 of the first locking tool 70 are fixed to the wall surfaces 3 and 4 by means such as screws.

  A second locking tool 80 as shown in FIG. 11 is fixed to the outer surface of the back plate 17 of the intake pipe 10. The second locking tool 80 is provided with a locking projection piece 82 to be locked to the locking piece 74 by cutting and raising the flat mounting plate 81.

For this reason, the intake pipe is formed by engaging the locking protrusions 82 of the second locking tool 80 with the locking pieces 74 of the first locking tool 70 from above at one or a plurality of vertical positions. 10 can be attached.
This also applies to the exhaust pipe.

  As shown in FIG. 13, the flat plate 71 of the first locking member 70 is not provided with the locking piece 74 as shown in FIGS. And the latching protrusion 83 is provided by the bending process from the upper end of the attachment plate 81 of the 2nd latching tool 80. FIG.

  In this manner, the locking piece 83 of the second locking tool 80 is placed on the back side of the flat plate 71 of the first locking tool 70 so that the inner surface of the boundary portion between the locking protrusion 83 and the mounting plate 81 is the first. The second locking tool 80 may be locked to the first locking tool 70 in a state where it is in contact with the upper end surface 71 a of the flat plate 71 of the first locking tool 70.

  The first and second locking members 70 and 80 may be structured so that they can be locked together in a cooperative manner, and may have a locking piece on one side and a hole on which the locking piece can be locked on the other side. .

  The intake pipe 10 (the exhaust pipe is the same) can be made of an iron plate, an aluminum plate, tinplate, wood or the like, and the front plate 13 and the front end portions of the first and second back plates 11 and 12 can be formed. The fixing method may not be fitting as shown in FIG. 2, but may be fixed with rivets or screws.

  Further, the first and second back plates 11 and 12 and the front plate 14 (or the back plate 17 when the back plate 17 is present) may be formed by integral molding of plastic.

  In this case, the locking protrusions 82 and 83 as shown in FIG. 11 and FIG. 14 may be provided on the back surface of the back plate 17 of the intake pipe 10 (or the exhaust pipe) by integral molding of plastic. .

  In addition, as shown in FIG. 12, you may cross | intersect the 1st, 2nd backplates 11 and 12 of the intake pipe 10 (the same is the case of an exhaust pipe) at an angle larger than a right angle. In this case, even if the wall surfaces 3 and 4 of the corner portion of the room are not perfectly orthogonal, the first and second back plates are attached by the first and second locking members 70 and 80. 11 and 12 can be brought into close contact with the wall surfaces 3 and 4, respectively.

If the first and second back plates 11 and 12 of the intake pipe 10 (the same applies to the exhaust pipe) cross each other at an angle larger than a right angle, the wall surfaces 3 and 4 are formed as shown in FIG. The intake pipe 10 may be attached by the fixed first locking tool 70 and the second locking tool 80 fixed to the back plate 17 of the intake pipe 10 (the exhaust pipe is the same). 4, a first locking member 70 is attached, and a second locking member 80 is attached to the outer surface of the first and second back plates 11, 12 of the intake pipe 10. 70 and 80 may be used to attach the intake pipe 10 (the same applies to the exhaust pipe).
The attachment of the intake pipe 10 has been illustrated above, but the same applies to the attachment of the exhaust pipe.

  In the embodiment described above with reference to FIG. 3, the hole 2 a is formed in the ceiling member 2 at the joint portion (corner portion) C in the room, and the upper end of the intake pipe 10 (or the exhaust pipe) is inserted into the ceiling back space 5. However, in all the embodiments described so far, as shown in FIG. 15, when the ceiling material 2 has a hole (not shown) for the ventilation fan, the ceiling material is enclosed so as to surround the hole. A ventilation fan cover 91 having a hole in the side wall is attached to the lower surface of 2, and a hole 95 is provided in the front plate 13 in the upper part of the intake pipe 10 (or exhaust pipe). The hole 95 and the hole of the ventilation fan cover 91 are connected to the ventilation pipe 96. You may communicate by (for example, a bellows type etc.).

  The present invention can be installed in a corner portion of a room without getting in the way, and it is possible to exhaust a bad odor in the room from the room to the outside, or to inject air for heating and cooling or the outside air into the room.

The front view which shows one Embodiment of this invention Horizontal sectional view in the same embodiment Vertical sectional view in the same embodiment Perspective view showing connected elbow tube Horizontal sectional view showing the installation state of the intake pipe etc. in the toilet The longitudinal cross-sectional view which shows the attachment state of other embodiment of this invention A longitudinal sectional view showing another embodiment of the present invention Horizontal sectional view showing another embodiment of the present invention Horizontal sectional view showing an example of the first locking tool AA sectional view in FIG. A perspective view showing an example of the 2nd locking implement Horizontal sectional view showing another embodiment of the present invention The perspective view which shows the other example of a 1st latching tool. The perspective view which shows the other example of the 2nd latching tool Horizontal perspective view which shows other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flooring material 2 Ceiling material 3, 4 Wall surface C Joint part 10 Intake pipe 11 1st back plate 12 2nd back plate 13 Front plate 14 Inlet 16 Inlet 17 Back plate 20 Connection elbow pipe 30 Pipe 70 1st Locking tool 80 Second locking tool 96 Ventilation pipe

Claims (20)

An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe is constituted by first and second strip-shaped back plates and a strip-shaped front plate which are orthogonal to each other and form a hollow right triangle with a cross section,
By attaching the first and second back plates to the two orthogonal wall surfaces of the indoor joint, respectively, the intake pipe is attached along the two orthogonal wall surfaces of the indoor space, and the intake air is sucked into the front plate. An indoor structure for installing an intake pipe, characterized in that a mouth is provided to discharge indoor air to the outside. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is constituted by first and second strip-shaped back plates and a strip-shaped front plate that are orthogonal to each other and that form a cross-sectional hollow right triangle.
By attaching the first and second back plates to the two orthogonal wall surfaces of the joint portion in the room, the exhaust pipe is attached along the joint portion of the two orthogonal wall surfaces in the room and exhausted to the front plate. An exhaust pipe indoor mounting structure characterized in that an opening is provided to discharge outdoor air into the room. An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe is constituted by first and second strip-shaped back plates and a strip-shaped front plate which are orthogonal to each other and form a hollow right triangle with a cross section,
The first and second back plates are respectively attached to two orthogonal wall surfaces of the joint portion in the room, whereby the intake pipe is attached along the joint portion of the two orthogonal wall surfaces in the room. An intake pipe indoor mounting structure characterized in that an air intake port is provided at a lower end surface of an intake pipe constituted by two back plates and a front plate to discharge indoor air to the outside of the room. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is composed of first and second strip-shaped back plates orthogonal to each other and forming a cross-section hollow right triangle, and a strip-shaped front plate,
By attaching the first and second back plates to the two orthogonal wall surfaces of the indoor joint portion, the exhaust pipe is attached along the joint portion of the two orthogonal wall surfaces in the room. An exhaust pipe indoor mounting structure, characterized in that an exhaust port is provided at a lower end surface of an intake pipe composed of two rear plates and a front plate to discharge outdoor air into the room. An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe has a substantially trapezoidal cross section by a band plate-shaped front plate, first and second band-plate back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
By attaching the first and second back plates to the two orthogonal wall surfaces of the indoor joint, respectively, the intake pipe is attached along the two orthogonal wall surfaces of the indoor space, and the intake air is sucked into the front plate. An indoor structure for installing an intake pipe, characterized in that a mouth is provided to discharge indoor air to the outside. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is substantially trapezoidal in cross section by a strip-shaped front plate, first and second strip-shaped back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
By attaching the first and second back plates to the two orthogonal wall surfaces of the joint portion in the room, the exhaust pipe is attached along the joint portion of the two orthogonal wall surfaces in the room and exhausted to the front plate. An exhaust pipe indoor mounting structure characterized in that an opening is provided to discharge outdoor air into the room. An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe has a substantially trapezoidal cross section by a band plate-shaped front plate, first and second band-plate back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
The first and second back plates are respectively attached to two orthogonal wall surfaces of the joint portion in the room, whereby the intake pipe is attached along the joint portion of the two orthogonal wall surfaces in the room, the front plate, 1. An intake pipe indoor mounting structure characterized in that an intake port is provided at a lower end surface of an intake pipe composed of a first back plate and a back plate to discharge indoor air to the outside. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is substantially trapezoidal in cross section by a strip-shaped front plate, first and second strip-shaped back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
By attaching the first and second back plates to two orthogonal wall surfaces of the indoor joint, respectively, the exhaust pipe is attached along the joint of the two orthogonal wall surfaces in the room, and the front plate, 1. An exhaust pipe indoor mounting structure characterized in that an exhaust port is provided at a lower end surface of an intake pipe composed of a first back plate and a back plate to discharge outdoor air into the room. An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe has a substantially trapezoidal cross section by a band plate-shaped front plate, first and second band-plate back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The intake pipe is attached along the joint of two wall surfaces orthogonal to each other in the room by the first lock and the second lock, and an air inlet is provided in the front plate to allow room air to flow outside the room. An indoor structure for installing an intake pipe, characterized in that the exhaust pipe is discharged. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is substantially trapezoidal in cross section by a strip-shaped front plate, first and second strip-shaped back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The exhaust pipe is attached along a joint portion between two orthogonal wall surfaces in the room by the first and second engaging tools, and an exhaust port is provided in the front plate to allow outdoor air to flow indoors. An exhaust pipe indoor installation structure characterized by being discharged into An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe has a substantially trapezoidal cross section by a band plate-shaped front plate, first and second band-plate back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The intake pipe is attached along the joint between two orthogonal wall surfaces in the room by the first and second locking tools, and the front plate, the first and second back plates, An intake pipe indoor mounting structure, characterized in that an intake port is provided at a lower end surface of an intake pipe made of a plate to discharge indoor air to the outside of the room. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is substantially trapezoidal in cross section by a strip-shaped front plate, first and second strip-shaped back plates orthogonal to each other, and a back plate connecting the first and second back plates. Configure
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The exhaust pipe is attached along a joint portion between two orthogonal wall surfaces in the room by the first locking tool and the second locking tool, and the front plate, the first and second back plates, An exhaust pipe indoor mounting structure characterized in that an exhaust port is provided at a lower end surface of an intake pipe constituted by a plate to discharge outdoor air into the room. An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe is composed of a band-shaped front plate, a band-shaped first and second back plates that intersect at an angle greater than a right angle, and a back plate that connects the first and second back plates. The cross section is almost trapezoidal,
By attaching the first and second back plates to the two orthogonal wall surfaces of the indoor joint, respectively, the intake pipe is attached along the two orthogonal wall surfaces of the indoor space, and the intake air is sucked into the front plate. An indoor structure for installing an intake pipe, characterized in that a mouth is provided to discharge indoor air to the outside. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe includes a strip-shaped front plate, strip plate field first and second back plates intersecting each other at an angle larger than a right angle, and a back plate connecting the first and second back plates. The cross section is almost trapezoidal,
By attaching the first and second back plates to the two orthogonal wall surfaces of the joint portion in the room, the exhaust pipe is attached along the joint portion of the two orthogonal wall surfaces in the room and exhausted to the front plate. An exhaust pipe indoor mounting structure characterized in that an opening is provided to discharge outdoor air into the room. An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe is composed of a band-shaped front plate, a band-shaped first and second back plates that intersect at an angle greater than a right angle, and a back plate that connects the first and second back plates. The cross section is almost trapezoidal,
The first and second back plates are respectively attached to two orthogonal wall surfaces of the joint portion in the room, whereby the intake pipe is attached along the joint portion of the two orthogonal wall surfaces in the room, the front plate, 1. An intake pipe indoor mounting structure characterized in that an intake port is provided at a lower end surface of an intake pipe composed of a first back plate and a back plate to discharge indoor air to the outside. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is composed of a band plate-shaped front plate, band plate-shaped first and second back plates intersecting each other at an angle larger than a right angle, and a back plate connecting the first and second back plates. The cross section is almost trapezoidal,
By attaching the first and second back plates to two orthogonal wall surfaces of the indoor joint, respectively, the exhaust pipe is attached along the joint of the two orthogonal wall surfaces in the room, and the front plate, 1. An exhaust pipe indoor mounting structure characterized in that an exhaust port is provided at a lower end surface of an intake pipe composed of a first back plate and a back plate to discharge outdoor air into the room. An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe is composed of a band-shaped front plate, a band-shaped first and second back plates that intersect at an angle greater than a right angle, and a back plate that connects the first and second back plates. The cross section is almost trapezoidal,
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The intake pipe is attached along the joint of two wall surfaces orthogonal to each other in the room by the first lock and the second lock, and an air inlet is provided in the front plate to allow room air to flow outside the room. An indoor structure for installing an intake pipe, characterized in that the exhaust pipe is discharged. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe includes a strip-shaped front plate, strip plate field first and second back plates intersecting each other at an angle larger than a right angle, and a back plate connecting the first and second back plates. The cross section is almost trapezoidal,
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The exhaust pipe is attached along a joint portion between two orthogonal wall surfaces in the room by the first and second engaging tools, and an exhaust port is provided in the front plate to allow outdoor air to flow indoors. An exhaust pipe indoor installation structure characterized by being discharged into An indoor structure for attaching an intake pipe along a joint between two orthogonal wall surfaces in a room,
The intake pipe is composed of a band-shaped front plate, a band-shaped first and second back plates that intersect at an angle greater than a right angle, and a back plate that connects the first and second back plates. The cross section is almost trapezoidal,
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The intake pipe is attached along the joint between two orthogonal wall surfaces in the room by the first and second locking tools, and the front plate, the first and second back plates, An intake pipe indoor mounting structure, characterized in that an intake port is provided at a lower end surface of an intake pipe made of a plate to discharge indoor air to the outside of the room. An exhaust pipe indoor mounting structure for attaching an exhaust pipe along a joint between two orthogonal wall surfaces in a room,
The exhaust pipe is composed of a band plate-shaped front plate, band plate-shaped first and second back plates intersecting each other at an angle larger than a right angle, and a back plate connecting the first and second back plates. The cross section is almost trapezoidal,
A first locking tool is provided at two corners of the wall surface that are orthogonal to each other in the indoor joint, and a second locking tool that cooperates with the first locking tool is provided on the outer surface of the back plate, The exhaust pipe is attached along a joint portion between two orthogonal wall surfaces in the room by the first locking tool and the second locking tool, and the front plate, the first and second back plates, An exhaust pipe indoor mounting structure characterized in that an exhaust port is provided at a lower end surface of an intake pipe constituted by a plate to discharge outdoor air into the room.

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