Ventilation device

Abstract

To provide a ventilation device which is easy in maintenance.SOLUTION: A ventilation passage 102 is provided within a frame body 10 for establishing a fluid communication between an interior-side opening 100 provided above the frame body 10 and an exterior-side opening 101 provided below the frame body 10, and a pair of flaps 11a, 11b are provided to adjust airflow passing through the exterior-side opening 101. In addition, one end 110 of each of the pair of flaps 11a, 11b is rotatably attached to a longitudinal edge 104 of the exterior-side opening 101, and the other end 111 faces each other when the airflow passing through the exterior-side opening 101 is restricted.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a ventilation device for taking in outside air into a room. [Background technology]

[0002] Conventionally, ventilation devices are used in buildings such as high-rise buildings where ventilation by opening and closing windows is difficult. For example, Patent Document 1 discloses a ventilation device having a frame body having an indoor opening, an outdoor opening, and a ventilation space communicating between the indoor opening and the outdoor opening, and an air volume adjustment plate and multiple elastic bodies arranged in the ventilation space. Here, the air volume adjustment plate has one end as a rotation axis, and when the inflow air volume from the outdoor opening increases, it rotates in a direction to close the indoor opening due to the wind pressure. In addition, the multiple elastic bodies gradually apply a reaction force against the rotation of the air volume adjustment plate in a direction to close the indoor opening, thereby gradually suppressing the rotation of the air volume adjustment plate in a direction to close the indoor opening. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-273256 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the ventilation device described in Patent Document 1 is designed to use multiple elastic bodies to gradually restrict the rotation of an air volume adjustment plate, which is rotatably attached with one end as the axis of rotation, in the direction of closing the indoor opening, and therefore requires regular maintenance work such as replacing the elastic bodies in order to maintain its performance.

[0005] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a ventilation device that is easy to maintain. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a ventilation passage in the frame body that communicates between an indoor opening provided above the frame body and an outdoor opening provided below the frame body, and provides a pair of flaps that adjust the airflow passing through the outdoor opening. Here, one end of each of the pair of flaps is rotatably attached to the longitudinal edge of the outdoor opening, and the other end faces the end of the other flap when the airflow passing through the outdoor opening is restricted.

[0007] For example, the present invention provides A ventilation system for introducing outside air into a room, A frame body having an indoor opening provided at an upper portion, an outdoor opening provided at a lower portion, and a ventilation passage communicating between the indoor opening and the outdoor opening; A pair of flaps for adjusting the airflow passing through the outdoor opening, The pair of flaps include One end of each is rotatably attached to a longitudinal edge of the exterior opening, and the other ends face each other when restricting airflow through the exterior opening. Effect of the Invention

[0008] In the present invention, a pair of flaps is provided to adjust the airflow passing through the outdoor opening, and a boundary layer, which is an area with a slow flow rate, is formed on the surface of each of the pair of flaps due to the viscosity of the air passing through the outdoor opening, and the flow rate of the air passing through the outdoor opening becomes faster near the center by the amount of the boundary layer (Coanda effect), and as a result, the air pressure in the area sandwiched between the pair of flaps is lower than the air pressure outside this area. In the absence of wind or weak wind, the air pressure difference between the area sandwiched between the pair of flaps and the outside of this area does not occur, or even if it does occur, it is small, so the pair of flaps open the outdoor opening by their own weight and do not restrict the airflow passing through the outdoor opening. On the other hand, in the case of a strong wind such as a gust of wind, the air pressure difference between the area sandwiched between the pair of flaps and the outside of this area becomes large, and the other ends of the pair of flaps are pulled in the direction opposite to each other, and as a result, the pair of flaps restrict the airflow passing through the outdoor opening. Therefore, regular maintenance work such as replacing the elastic body is not required to maintain the performance. Therefore, according to the present invention, it is possible to provide a ventilation device that is easy to maintain. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1(A) is a schematic plan view of a window structure to which a ventilation device 1 according to one embodiment of the present invention is applied, and FIG. 1(B) is a schematic enlarged view of the AA cross section of the window structure shown in FIG. 1(A). [Diagram 2] FIG. 2(A) is a schematic plan view of the ventilation device 1, and FIG. 2(B) is a schematic front view of the ventilation device 1. [Diagram 3] FIG. 3 is a schematic enlarged view of the BB cross section of the ventilation device 1 shown in FIG. 2(A). [Figure 4] Figure 4(A) is a diagram for explaining the opening operation of the outdoor opening 101 by a pair of flaps 11a, 11b, and Figure 4(B) is a diagram for explaining the closing operation of the outdoor opening 101 by the pair of flaps 11a, 11b. [Diagram 5]FIG. 5(A) is a diagram for explaining the open state of the outdoor opening 101 by the gate 12, and FIG. 5(B) is a diagram for explaining the closed state of the outdoor opening 101 by the gate 12. [Figure 6] 6(A) and 6(B) are diagrams for explaining a modified example 1a of the ventilation device, and correspond to FIGS. 4(A) and 4(B) of the ventilation device 1. FIG. [Figure 7] 7(A) and 7(B) are diagrams for explaining a modified example 1b of the ventilation device, and correspond to FIGS. 4(A) and 4(B) of the ventilation device 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] Fig. 1(A) is a schematic front view of a window structure to which a ventilation device 1 according to the present embodiment is applied, and Fig. 1(B) is a schematic enlarged view of the AA cross section of the window structure shown in Fig. 1(A). In Fig. 1(B), the cross section of the portion of the ventilation device 1 according to the present embodiment is hatched, and the cross sections of the other window structures are not hatched.

[0012] As shown in the figure, a ventilation device 1 according to this embodiment is disposed on a pericounter (bottom frame) 30 of a frame (window frame) 3 of a window glass 2 installed in a high-rise building or the like, and takes in outside air into a room through an air intake 31 of the pericounter 30. This ventilates the room.

[0013] Fig. 2(A) is a schematic plan view of the ventilation device 1, and Fig. 2(B) is a schematic front view of the ventilation device 1. Also, Fig. 3 is a schematic enlarged view of the BB cross section of the ventilation device 1 shown in Fig. 2(A).

[0014] As shown in the figure, the ventilation device 1 is configured to include a frame 10, a pair of flaps 11a and 11b, and a gate 12.

[0015] The frame 10 has an indoor opening 100 provided at the top (indoor side), an outdoor opening 101 provided at the bottom (outdoor side), and a ventilation passage 102 connecting the indoor opening 100 and the outdoor opening 101. The indoor opening 100 is composed of multiple slits 103 and connects the ventilation passage 102 with the room. The outdoor opening 101 is rectangular and connects the ventilation passage 102 with the outside of the room via the intake port 31 of the pericounter 30.

[0016] The pair of flaps 11a, 11b are made of synthetic resin or light metal such as aluminum, and one end 110 of each is rotatably attached to a longitudinal edge 104 of the outdoor opening 101, and the airflow passing through the outdoor opening 101 is adjusted by rotating around the end 110 as an axis of rotation. The flaps 11a, 11b for adjusting the airflow passing through the outdoor opening 101 are provided at the outdoor opening 101 located between the air intake 31 and the indoor opening 100, and a boundary layer, which is an area with a slow flow velocity, is formed on the surfaces 115 of the flaps 11a, 11b due to the viscosity of the air passing through the outdoor opening 101, and the flow velocity of the air passing through the outdoor opening 101 is faster near the center by the amount of this boundary layer (Coanda effect), and as a result, the air pressure in the area A sandwiched between the flaps 11a, 11b becomes lower than the air pressure outside the area B. When the outside air flowing from the intake port 31 to the ventilation passage 102 through the outdoor opening 101 is calm or weak, the pressure difference between the area A sandwiched between the flaps 11a and 11b and the outside area B does not occur, or if it does occur, it is small. In this case, as shown in FIG. 4(A), the flaps 11a and 11b rotate in a direction in which the other end 111 is positioned downward due to their own weight, opening the outdoor opening 101 and not restricting the outdoor air passing through the outdoor opening 101. On the other hand, when the outside air flowing from the intake port 31 to the ventilation passage 102 through the outdoor opening 101 is a gust or strong wind, the pressure difference between the area A sandwiched between the flaps 11a and 11b and the outside area B occurs depending on the strength of the outdoor air passing through the outdoor opening 101. When this air pressure difference becomes equal to or greater than a predetermined value, as shown in Fig. 4(B), the other ends 111 of the flaps 11a and 11b rotate in opposing directions and are drawn toward each other, closing the outdoor opening 101 and restricting the outside air passing through the outdoor opening 101. At this time, the other ends 111 of the flaps 11a and 11b are configured to come into surface contact with each other. After the other ends 111 of the flaps 11a and 11b come into surface contact with each other and close the outdoor opening 101, no outside air passes through the outdoor opening 101, so no force is generated that draws the other ends 111 of the flaps 11a and 11b toward each other.Outside air hits the rear surfaces 116 of the flaps 11a, 11b with a wind pressure equal to or greater than a predetermined value, thereby maintaining the outdoor opening 101 in a closed state (a state in which the other ends 111 of the flaps 11a, 11b are in surface contact with each other).

[0017] A sound deadening material (buffer material) may be provided at the other end 111 of each of the flaps 11a and 11b. Examples of the sound deadening material include foam materials such as silicone foam, ethylene propylene rubber (EPDM) foam, and chloroprene rubber (CR).

[0018] Moreover, the flaps 11a and 11b are each divided into a plurality of segments 112 in the longitudinal direction of the outdoor opening 101 (see FIG. 2(B)). By dividing the flaps 11a and 11b into a plurality of segments 112 (for example, the length of the segments 112 is about 100 mm for a total length of 600 to 1500 mm), the deflection of the flaps 11a and 11b can be reduced, and the movement (rotation around one end 110 as the rotation axis) can be made smooth. Furthermore, by adjusting the length of the segments 112 and adjusting their weight, the air pressure difference (the strength of the outside air flowing into the ventilation passage 102 from the air intake 31) between the area A sandwiched between the flaps 11a and 11b and the outside area B when the flaps 11a and 11b close the outdoor opening 101 can be adjusted.

[0019] Furthermore, the flaps 11a and 11b each have a slit 113 between the adjacent segments 112 (see FIG. 2(B)). After the flaps 11a and 11b close the outdoor opening 101, no force is generated to attract the other ends 111 of the flaps 11a and 11b to each other. Therefore, when the inflow of outside air from the intake port 31 to the ventilation passage 102 is completely blocked, the air pressure difference between the area A sandwiched between the flaps 11a and 11b and the outside area B becomes small. At this time, if the wind pressure of the outside air hitting the back surfaces 116 of the flaps 11a and 11b to maintain the closed state is not large enough, an event occurs in which the flaps 11a and 11b repeatedly open and close the outdoor opening 101 at high speed (hereinafter referred to as chattering). Therefore, this slit 113 prevents the flow of outside air from the intake port 31 into the ventilation passage 102 from being completely blocked when the flaps 11a, 11b close the outdoor opening 101, thereby preventing the occurrence of chattering.

[0020] The gate 12 is connected to a lever 13 provided on the frame body 10 so that the gate 12 slides inside the ventilation passage 102 by operating the lever 13. For example, when the lever 13 is pulled out from the frame body 10, the gate 12 slides to a position away from the outdoor opening 101 as shown in Fig. 5(A), and when the lever 13 is pushed back into the frame body 10, the gate 12 slides to a position blocking the outdoor opening 101 as shown in Fig. 5(B). In this way, the gate 12 opens and closes the outdoor opening 101 from inside the ventilation passage 102.

[0021] One embodiment of the present invention has been described above.

[0022] In this embodiment, a pair of flaps 11a and 11b that adjusts the airflow passing through the outdoor opening 101 located between the air intake 31 and the indoor opening 100 is provided at the outdoor opening 101. The viscosity of the air passing through the outdoor opening 101 forms a boundary layer, which is a region with a slow flow rate, on the surfaces 115 of the pair of flaps 11a and 11b. The flow rate of the air passing through the outdoor opening 101 is faster near the center by the amount of the boundary layer (Coanda effect). As a result, the air pressure in the region A sandwiched between the pair of flaps 11a and 11b is lower than the air pressure outside the region B. When there is no wind or a weak wind, there is no air pressure difference between the region A sandwiched between the pair of flaps 11a and 11b and the region outside the region B, or if there is a difference, it is small. Therefore, the pair of flaps 11a and 11b open the outdoor opening 101 by their own weight (see FIG. 4(A)) and do not restrict the airflow passing through the outdoor opening 202. On the other hand, in the case of strong winds such as gusts of wind, the difference in air pressure between the area A sandwiched between the pair of flaps 11a, 11b and the outside area B becomes large, and the other ends 111 of the pair of flaps 11a, 11b are pulled in the opposing directions to close the outdoor opening 101 (see FIG. 4(B)), restricting the airflow passing through the outdoor opening 101. Therefore, no periodic maintenance work such as replacing the elastic body is required to maintain the performance. Therefore, according to this embodiment, it is possible to provide a ventilator 1 that is easy to maintain.

[0023] In this embodiment, the flaps 11a and 11b are each divided into a plurality of segments 112 in the longitudinal direction of the outdoor opening 101. This reduces the deflection of the flaps 11a and 11b, making their movement smoother. By adjusting the length of the segments 112 and adjusting their weight, it is possible to adjust the pressure difference between the ventilation passage 102 and the intake port 31 (the strength of the outside air flowing into the ventilation passage 102 from the intake port 31) when the flaps 11a and 11b close the outdoor opening 101.

[0024] Furthermore, in this embodiment, the flaps 11a and 11b each have a slit 113 between the adjacent segments 112. Therefore, when the flaps 11a and 11b close the outdoor opening 101, the inflow of outside air from the intake port 31 into the ventilation passage 102 is prevented from being completely blocked, and chattering can be prevented.

[0025] The present invention is not limited to the above-described embodiment, and can be modified within the scope of the invention.

[0026] For example, in the above embodiment, the other end portions 111 of the flaps 11a and 11b are in surface contact with each other when the flaps 11a and 11b close the outdoor opening 101. However, the present invention is not limited to this.

[0027] For example, as in the modified example 1a of the ventilation device shown in Figures 6(A) and 6(B), the other end portions 111 of the flaps 11a and 11b may be in line contact with each other when the flaps 11a and 11b close the outdoor opening 101. Here, the other end portions 111 of the flaps 11a and 11b may be flat and not inclined.

[0028] Alternatively, as in the modified example 1b of the ventilation device shown in Fig. 7(A) and Fig. 7(B), the other end 111 of each of the flaps 11a and 11b may be pulled in a direction opposite to each other and rotate in a direction to close the outdoor opening 101 to restrict the airflow passing through the outdoor opening 101, so that the other end 111 of the flaps 11a and 11b may be opposed to each other via a gap 114. In this way, when the flaps 11a and 11b restrict the airflow passing through the outdoor opening 101, it is possible to prevent the inflow of outside air from the intake port 31 into the ventilation passage 102 from being completely blocked, thereby preventing the occurrence of chattering. In this case, the slit 113 provided between the adjacent segments 112 of the flaps 11a and 11b can be omitted.

[0029] In the above embodiment, the ventilation device 1 is installed on the pericounter (lower frame) 30 of the window frame 3. However, the present invention is not limited to this. The ventilation device 1 may be installed on the upper frame of the window frame 3. It may also be installed on a wall surface of a building that does not have window glass 2. In other words, the ventilation device 1 only needs to be installed so as to take in outside air from the outdoor opening 101 into the ventilation passage 102 and send the air from the indoor opening 100 into the room. [Explanation of symbols]

[0030] 1: Ventilation system 2: Window glass 3: Window frame 10: Frame 11a, 11b: Flap 12: Gate 13: Lever 30: Pericounter 31: Intake vent 100: Indoor opening 101: Outdoor opening 102: Ventilation passage 103: Slit 104: Edge of the exterior opening 101 in the longitudinal direction 110: one end of the flaps 11a and 11b 111: The other end of the flaps 11a and 11b 112: Segment 113: Slit 114: Gap 115: Surface of flaps 11a and 11b 116: Back surface of flaps 11a and 11b

Claims

1. A ventilation system for introducing outside air into a room, A frame body having an indoor opening provided at an upper portion, an outdoor opening provided at a lower portion, and a ventilation passage communicating between the indoor opening and the outdoor opening; A pair of flaps for adjusting the airflow passing through the outdoor opening, The pair of flaps include One end of each of the two openings is rotatably attached to a longitudinal edge of the outdoor opening, and the other end of each of the two openings faces each other when restricting airflow through the outdoor opening. A ventilation device characterized by:

2. 2. The ventilation device according to claim 1, The flap is The exterior opening is divided into a plurality of parts in the longitudinal direction. A ventilation device characterized by:

3. 2. The ventilation device according to claim 1, The flap is A slit is provided for directing outside air into the ventilation passage when the outdoor opening is closed. A ventilation device characterized by:

4. A ventilation device according to any one of claims 1 to 3, The pair of flaps include When the outdoor opening is closed, the other end portions come into contact with each other. A ventilation device characterized by:

5. A ventilation device according to any one of claims 1 to 3, The pair of flaps include When the airflow passing through the outdoor opening is restricted, the other ends face each other via a gap. A ventilation device characterized by:

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