JP6052989B2 - Ventilation equipment - Google Patents

Description

  The present invention relates to a ventilator used to ventilate an outdoor space such as a building and an indoor space.

  Generally, in a building such as a high-rise building, the higher the floor, the stronger the wind, and from the viewpoint of safety against falling, the structure is such that the window cannot be opened and closed. For this reason, the proposal of the ventilator which can ventilate between outdoor space and indoor space, without opening and closing a window is desired. The thing of patent document 1 is known as an example of such a ventilator.

  This ventilation device includes a housing having a passage through which air passes from the outdoor space toward the indoor space, and rotating blades that are rotatably supported in the passage of the housing. As the rotary blades rotate, the opening degree of the passage in the housing is changed, and the flow rate of the air passing through the passage can be adjusted. As a result, when the gust blows while taking air from the outdoor space into the indoor space, the opening degree of the passage in the housing is adjusted, and an unpleasant air flow is suppressed from occurring in the indoor space.

JP 2008-286447 A

  By the way, from the viewpoint of the daylighting property of the building window and the design property of the building itself, it is required to suppress the height of the ventilation device. For this purpose, it is necessary to suppress the height dimension in the cross section of the passage of the housing. On the other hand, in order to take in a desired flow rate of air into the indoor space when the rotary blade is in the open position, the flow rate of air is taken between the inner surface of the passage and the rotary blade in the cross section of the passage. It is necessary to secure a flow path that can be used. The inventor has room for improvement in a structure that can secure a flow path for taking air into the indoor space when the rotary blade is in the open position while suppressing the height dimension in the cross section of the passage of the housing. I came to recognize that.

  The present invention has been made in view of such a situation, and an object of the present invention is to suppress the height dimension in the cross section of the passage of the housing while the rotary wing is in the open position and It is providing the ventilation apparatus which can ensure the flow path for taking in.

  In order to solve the above-described problems, a ventilator according to an aspect of the present invention is a ventilator for ventilating between an outdoor space and an indoor space, and is a flow provided to open to the outdoor space. A housing having an inlet, an outlet opening provided toward the indoor space, a passage from the inlet to the outlet, and the opening of the passage can be changed by rotating in the passage; A flow formed between a rotating blade provided with a protrusion extending along the direction of the air flowing in the passage with respect to the center of rotation and the housing sandwiching the rotating blade when the passage is in an open position. A throttle portion provided on at least one of the roads.

  In addition, a ventilator according to an aspect of the present invention is a ventilator for ventilating between an outdoor space and an indoor space, and has an inflow opening provided toward the outdoor space and an indoor space. And a housing having an outlet opening provided therein, a passage extending from the inlet to the outlet, and an opening position where the opening degree of the passage can be changed by rotating in the passage, and the passage is opened. Sometimes, a rotating blade provided with a protrusion extending along the direction of the air flowing in the passage with respect to the center of rotation, and when the air passes through the passage from the inlet to the housing Pressure difference generating means for rotating the protrusion from the open position by generating a pressure difference between the different flow paths formed therebetween.

  According to the ventilator according to the present invention, it is possible to secure a flow path for taking air into the indoor space when the rotary blade is in the open position while suppressing the height dimension in the cross section of the passage of the housing. .

It is a front view which shows the structure of the curtain wall to which the ventilator which concerns on one Embodiment of this invention is attached. It is side surface sectional drawing which shows the structure of the ventilation apparatus which concerns on one Embodiment of this invention. It is a plane sectional view showing the composition of the ventilator concerning one embodiment of the present invention. It is explanatory drawing for demonstrating the positional relationship of the rotation center of a rotary blade, and the gravity center by the dead weight of a rotary blade. It is explanatory drawing which shows typically a state when a rotary blade rotates and moves from a closed position to an open position, and the engaging part of the rotary blade has engaged with the 1st rotation stopper. It is side surface sectional drawing which shows the state which closed the outflow port with the opening-and-closing lid | cover of the ventilation apparatus which concerns on one Embodiment of this invention.

  FIG. 1 is a front view showing a configuration of a curtain wall 71 to which a ventilation device 1 according to an embodiment of the present invention is attached. FIG. 2 is a side sectional view showing the configuration of the ventilator 1 according to one embodiment of the present invention, and FIG. 3 is a plan sectional view thereof.

  As shown in FIG. 2, the ventilation device 1 is used to ventilate between an outdoor space 3 and an indoor space 5 partitioned by a wall such as a building 7. In the present embodiment, the ventilation device 1 is attached to a curtain wall 71 as a wall attached to a building such as a floor of a building 7 or a beam.

  Returning to FIG. 1, the curtain wall 71 includes, for example, a frame 72 configured by a plurality of frame members framed in a rectangular shape, and a glass plate 73 fitted inside the frame 72. The curtain wall 71 includes a pair of ventilator horizontal frames 72a provided at intervals in the vertical direction at the attachment position of the ventilator 1. The ventilator 1 is attached to the pair of ventilator horizontal frames 72a.

  As shown in FIG. 2, the ventilation device 1 includes a housing 11, a rotary blade 21, a first rotation stopper 41, a second rotation stopper 43, and an opening / closing lid 51.

  As shown in FIGS. 2 and 3, the housing 11 is connected to, for example, the upper frame 11A and the lower frame 11B that are spaced apart from each other in the vertical direction, and the lateral sides of the upper frame 11A and the lower frame 11B. Side frame 11C. The housing 11 is formed in a box shape by the upper frame 11A, the lower frame 11B, and the side frame 11C. The housing 11 is fixed and attached to the indoor side surface of the pair of ventilator horizontal frames 72a by a fixing tool 61 such as a screw.

  As shown in FIG. 2, the housing 11 includes an inflow port 13 that opens to the outdoor space 3, an outflow port 15 that opens to the indoor space 5, and the inflow port 13 to the outflow port 15. And a passage 17. The inlet 13, the outlet 15 and the passage 17 are formed inside the upper frame 11A, the lower frame 11B, and the side frame 11C. In the present embodiment, the inflow port 13 is provided to be opened in the horizontal direction, and the outflow port 15 is provided to be opened upward in the vertical direction. However, the opening direction is not limited.

  The rotary blade 21 is supported so as to be rotatable with respect to the housing 11 in the passage 17. The rotary blade 21 is provided substantially horizontally such that an axis passing through the rotation center Rc intersects the direction in which air flows from the inlet 13 to the outlet 15 of the housing 11. The rotating blade 21 is provided so as to be able to change the opening degree of the passage 17 in the housing 11 by rotating, whereby the flow rate of the air passing through the passage 17 can be adjusted. As will be described later, the rotary blade 21 stops at an open position where the passage 17 is opened when the wind speed of the air passing through the passage 17 is slow, and closes the passage 17 when the wind speed of the air passing through the passage 17 is fast. Rotates to the closed position and stops still.

  In the present embodiment, as shown in FIG. 3, the ventilation device 1 has a receiving member 31, a rotating shaft 32, and a structure for supporting the rotating blades 21 so as to be rotatable with respect to the housing 11 in the passage 17. And a connecting member 33.

In the passage 17, the receiving member 31 is fixed to the side frames 11 </ b> C on both sides in the left-right direction of the housing 11 by fixing tools 62 such as screws. The rotating shaft 32 is inserted into the bearing hole of the receiving member 31 and is supported rotatably with respect to the housing 11. The connecting member 33 includes, for example, a shaft-side fixing portion 33a fixed to the rotating shaft 32 by welding, and a wing-side fixing portion 33b fixed to the upper surface of the rotating wing 21 by a fixing tool 63 such as a screw. The rotating shaft 32 and the rotating blade 21 are connected. The rotary wing 21 is connected to the rotary shaft 32 via a connecting member 33, and is supported in the passage 17 so as to be rotatable with respect to the housing 11. At this time, the rotation center Rc of the rotary blade 21 coincides with the rotation center of the rotary shaft 32.

  Returning to FIG. 2, the rotary blade 21 includes a protruding portion 22, a throttle portion 23, a hollow portion 24, and an engaging portion 25. The rotary blade 21 is formed by extrusion molding using a metal material such as aluminum as a raw material, and each part is provided integrally, but may be configured by combining separate members.

  The protrusion 22 of the rotary wing 21 is provided to extend along the direction (for example, the horizontal direction) of the air flowing in the passage 17 with respect to the rotation center Rc when the rotary wing 21 is in the open position. Further, the protrusion 22 extends so as not to block the flow of air in the passage 17 from the inlet 13 side to the outlet 15 side when the rotary blade 21 is in the open position. The rotary wing 21 is provided with a throttle portion 23 so that the air flowing in the passage 17 can be rotated from the open position without being received by the protrusion 22. In the present embodiment, since the inflow port 13 opens in the horizontal direction and the air flows substantially horizontally in the passage 17 at the position where the protrusion 22 is provided, the protrusion 22 has a direction in which the air flows. So as to extend substantially horizontally. The protrusion 22 is formed in a flat plate shape. In the following description, the direction in which the protruding portion 22 extends with respect to the rotation center Rc of the rotary wing 21 will be described as the front side of the rotary wing 21, and the opposite direction will be described as the rear side of the rotary wing 21.

  The diaphragm 23 of the rotary wing 21 is provided so as to protrude downward from the rotary wing 21 at an intermediate position in the front-rear direction of the rotary wing 21. The throttle portion 23 has a lower surface formed in an arc shape that gradually approaches the lower surface 17a of the passage 17 of the housing 11 from the front side to the rear side of the rotary blade 21, and is provided in a hollow cylindrical shape, for example. ing. The hollow portion 24 of the rotary blade 21 has an upper surface formed so as to form a continuous arc-shaped surface from the upper surface of the throttle portion 23 and is provided in a hollow cylindrical shape. The engaging portion 25 of the rotary wing 21 is provided at the rear end portion of the rotary wing 21 so as to protrude upward.

  The rotation of the protrusion 22 of the rotary blade 21 is restricted by the first rotation stopper 41, and the rotary blade 21 is held in the open position. When the protrusion 22 of the rotary blade 21 rotates from the open position, the rotation of the protrusion 22 is restricted by the second rotation stopper 43 and the rotary blade 21 is held in the closed position. In FIG. 2, the state when the rotary blade 21 is in the closed position is indicated by a two-dot chain line.

  When the rotary blade 21 is in the open position, the passage 17 of the housing 11 is partitioned by the rotary blade 21 so that the first flow path 18 and the second flow path 19 are between the rotary blade 21 and the housing 11. Different flow paths are formed. In the present embodiment, the first flow path 18 is formed by the lower surface of the rotary blade 21 and the lower surface 17 a of the passage 17 of the housing 11. The second flow path 19 is formed by the upper surface of the rotary blade 21 and the upper surface 17 b of the passage 17 of the housing 11.

  The throttle portion 23 is provided in the first flow path 18 below the rotary blade 21. In the present embodiment, the throttle portion 23 is provided on the rotary blade 21, but may be provided on the lower surface 17 a that is the inner surface of the passage 17 of the housing 11. In this case, the lower surface 17a of the passage 17 of the housing 11 is a part of the lower surface 17a at an intermediate position from the inlet 13 side to the outlet 15 side of the first flow path 18 when the rotary vane 21 is in the open position. Is provided so as to protrude toward the rotary wing 21.

  The restrictor 23 functions as a resistance of air passing through the first flow path 18, and the flow rate of air passing through the first flow path 18 is slower than the flow rate of air passing through the second flow path 19. As a result, when air passes from the inlet 13 of the housing 11 into the passage 17, the pressure of the second flow path 19 becomes smaller than the pressure of the first flow path 18, and the second flow path 19 and the first flow path 18 A pressure difference occurs between the two. And the force which goes to a closed position acts on the protrusion part 22 of the rotary blade 21 by a pressure difference, and the protrusion part 22 begins to rotate from an open position.

  As described above, the throttle portion 23 is provided as a pressure difference generating means for rotating the protruding portion 22 from the open position by generating a pressure difference between the first flow path 18 and the second flow path 19. The first flow path 18 is provided with a throttle 23 in the middle so that the rotary blade 21 can rotate from the open position due to the pressure difference acting on the protruding portion 22 of the rotary blade 21, so that the cross-sectional shape thereof is Adjusted. The cross-sectional shape is adjusted so that the cross-sectional area at the position of the throttle portion 23 is smaller than the cross-sectional area of the first flow path 18 on the inlet 13 side. As the ratio of the cross-sectional areas increases, the pressure difference acting on the protrusions 22 increases, and the rotating blades 21 can easily rotate from the open position.

  Further, the protruding portion 22 of the rotary wing 21 functions as a portion that receives a force due to a pressure difference for rotating the rotary wing 21 from the open position. When the rotary blade 21 is in the open position, the protrusion 22 is more easily rotated from the open position by a force due to a pressure difference as the length extending from the rotation center Rc along the direction of the air flowing in the passage 17 becomes longer. Become. The length of the protrusion 22 extending along the direction of the air flowing in the passage 17 from the rotation center Rc is adjusted so that the protrusion 22 can be rotated from the open position by a force due to a pressure difference.

  FIG. 4 is an explanatory diagram for explaining the positional relationship between the rotation center Rc of the rotary blade 21 and the center of gravity Gc due to its own weight. 4A shows a state when the rotary blade 21 is in the open position, and FIG. 4B shows a state when the rotary blade 21 rotates from the open position to the closed position.

  As shown in FIG. 4A, when the rotary wing 21 is in the open position, the center of gravity Gc due to its own weight is provided below the rotation center Rc. The reason for this will be described. As shown in FIG. 4B, when the rotary wing 21 rotates from the open position, if the center of gravity Gc of the rotary wing 21 is within the range of the rotation amount until the same height with respect to the rotation center Rc, As the rotation amount increases, the horizontal distance Lh from the rotation center Rc to the center of gravity Gc becomes longer. The bending moment M acting around the rotation center Rc due to gravity with respect to the center of gravity Gc increases as the horizontal distance Lh from the rotation center Rc to the center of gravity Gc increases. Further, the bending moment M acts as a biasing force toward the open position with respect to the rotary blade 21. Therefore, as the amount of rotation of the rotary wing 21 increases, the biasing force toward the open position with respect to the rotary wing 21, in other words, the rotational resistance of the rotary wing 21 increases.

  Here, as shown in FIG. 2, in the ventilation device 1 according to the present embodiment, the rotating blades 21 are connected to the rotating shaft 32 by a connecting member 33. For this reason, the positional relationship between the rotation center Rc of the rotary blade 21 and the center of gravity Gc due to its own weight is adjusted by adjusting the length of the connection member 33 and the fixing position of the connection member 33 with respect to the rotary blade 21. It can be adjusted freely. This means that the horizontal distance Lh from the rotation center Rc to the center of gravity Gc when the rotary blade 21 rotates can be freely adjusted, and thus the design for adjusting the rotational resistance of the rotary blade 21 is achieved. The degree of freedom is improved.

  When the rotary wing 21 is in the open position, the engaging portion 25 of the rotary wing 21 engages with the first rotation stopper 41 from below, and the rotation of the protruding portion 22 of the rotary wing 21 is restricted. . Thereby, as will be described below, noise associated with the rotation operation of the rotary blade 21 is reduced.

  FIG. 5 is an explanatory view schematically showing a state when the rotary blade 21 is rotationally moved from the closed position to the open position and the rotary blade 21 is engaged with the first rotary stopper 41. FIG. 5A shows a state when the rotary blade 21 is engaged with the first rotation stopper 41 from above, and FIG. 5B shows a bearing of the rotary shaft 32 and the receiving member 31 at that time. The relationship with the hole 31a is shown. FIG. 5C shows a state when the engaging portion 25 of the rotary blade 21 is engaged with the first rotation stopper 41 from below, and FIG. 5D shows the rotating shaft 32 at that time. And the bearing hole 31a of the receiving member 31 are shown.

  In general, a clearance 31 b as a gap is provided between the rotating shaft 32 and the bearing hole of the receiving member 31. For this reason, as shown in FIGS. 5A and 5B, when the rotary blade 21 suddenly rotates from the closed position toward the open position, the rotary blade 21 is located above the first rotation stopper 41. When engaged, the rotary blade 21 tries to rotate with the engagement point as a rotation fulcrum. As a result, the rotating shaft 32 moves so as to jump within the bearing hole 31a of the receiving member 31, and noise is generated when the rotating shaft 32 and the bearing hole 31a come into contact with each other. On the other hand, as shown in FIGS. 5C and 5D, when the engaging portion 25 of the rotary blade 21 is engaged with the first rotation stopper 41 from below, the bearing hole of the receiving member 31. The jumping motion of the rotary shaft 32 inside is suppressed, and noise is reduced.

  Returning to FIGS. 2 and 3, the first rotation stopper 41 is a rod-like member fixed to the side frames 11 </ b> C on both sides in the left-right direction of the housing 11 by a fixing tool 64 such as a screw behind the rotary blade 21. It is composed of The first rotation stopper 41 is provided as a first rotation restricting means for restricting the rotation of the protrusion 22 of the rotating blade 21 from the closed position toward the open position when the rotating blade 21 is in the open position. As an alternative to the first rotation stopper 41, the rotation blade 21 may be engaged with the upper surface 17 b and the lower surface 17 a that are the inner surfaces of the passage 17 of the housing 11 to restrict the rotation thereof.

  The second rotation stopper 43 is composed of a rod-like member fixed to the side frames 11 </ b> C on both sides in the left-right direction of the housing 11 by a fixing tool 65 such as a screw above the rotary blade 21. The second rotation stopper 43 is provided as second rotation restricting means for restricting rotation from the open position of the protrusion 22 of the rotary blade 21 toward the closed position. The second rotation stopper 43 as the second rotation restricting means may not be provided. As an alternative to the second rotation stopper 43, the rotating blade 21 may be engaged with the upper surface 17 b and the lower surface 17 a that are the inner surfaces of the passage 17 of the housing 11 to restrict the rotation thereof.

  FIG. 6 is a side cross-sectional view showing a state where the outlet 15 is closed by the opening / closing lid 51 of the ventilation device 1. The opening / closing lid 51 is provided so that the outlet 15 of the housing 11 can be opened and closed. The opening / closing lid 51 is rotatably attached to the lower frame 11B via a pin 52 at the upper part of the lower frame 11B. The opening / closing lid 51 can be moved between the closing position for closing the outlet 15 of the housing 11 and the opening position for opening the outlet 15 by rotating around the pin 52, thereby opening and closing the outlet 15. It is possible. The opening / closing lid 51 may be opened / closed manually or electrically.

  The housing 11 includes an annular seal 53 made of an elastic body provided at the upper edge of the outlet 15. The annular seal 53 is sandwiched between the opening / closing lid 51 and the housing 11 when the opening / closing lid 51 is in the closed position for closing the outlet 15, and the sealing performance between the opening / closing lid 51 and the housing 11 is enhanced. .

  As shown in FIG. 2, when the rotary blade 21 is in the closed position, the housing 11 is provided at a position away from the axis passing through the rotation center Rc of the rotary blade 21 and is an inner surface of the passage 17 facing each other. Gap 16a, 16b is provided between the upper surface 17b, the lower surface 17a, and the rotary blade 21. The upper surface 17b and the lower surface 17a which are the inner surfaces of the passage 17 are opposed to each other with an axis passing through the rotation center Rc interposed therebetween.

  In the present embodiment, when the rotary blade 21 is in the closed position, a gap 16 a is provided between the tip end portion of the protruding portion 22 of the rotary blade 21 and the upper surface 17 b of the passage 17 of the housing 11. Further, a gap 16 b is provided between the lower surface of the rotary blade 21 and the lower surface 17 a of the passage 17 of the housing 11. Thereby, even when the rotary wing 21 is in the closed position, air passes through the gaps 16a and 16b and is ventilated in a wide range extending in the left-right direction of the housing 11, and the environment of the indoor space 5 becomes comfortable. . The gaps 16 a and 16 b may be provided between at least one of the upper surface 17 b and the lower surface 17 a that are the inner surfaces of the opposing passages 17 and the rotary blade 21.

  Further, as shown in FIG. 3, the housing 11 is configured such that, for example, side gaps 16 c are provided between the rotating blades 21 and the housing 11 on both the left and right sides. Thereby, even when the rotary wing 21 is in the closed position, air passes through the side gaps 16c on both the left and right sides of the housing 11, and the environment of the indoor space 5 becomes comfortable. The side gap 16c is not limited to the left and right sides of the rotary wing 21 and may be provided only on either the left or right side.

  Further, as shown in FIG. 2, the housing 11 is formed by chamfering an edge portion 15a of the outflow port 15 on the side of the passage 17 and positioned on the inflow port 13 side. Thereby, the flow path of the air which passes toward the outflow port 15 from the inflow port 13 of the housing 11 becomes large, and the flow volume which can be taken in into the indoor space 5 can be increased.

  Operation | movement of the ventilator 1 comprised as mentioned above is demonstrated. When ventilation is performed between the indoor space 5 and the outdoor space 3 by the ventilator 1, the open / close lid 51 is moved to the open position so that the outlet 15 of the ventilator 1 is opened.

  When the wind speed of the air passing through the passage 17 from the outdoor space 3 toward the indoor space 5 is slow, the rotary blade 21 remains stopped at the open position. At this time, the opening degree of the passage 17 of the housing 11 is maximized, and the inflow amount of air taken into the indoor space 5 from the outdoor space 3 can be increased with respect to the wind speed.

  The rotary wing 21 starts to rotate from the open position toward the closed position when air having a wind speed exceeding a predetermined lower limit wind speed passes through the passage 17 such as 3 m / sec. The passages 17 of the housing 11, the first flow path 18, the second flow path 19, the throttle part 23, and the rotary blades 21 are arranged so that the rotary blades 21 begin to rotate when air of such wind speed passes through the passage 17. The shape, the weight of the rotary feather 21 and the like are adjusted.

  Until the rotating blade 21 rotates from the open position toward the closed position, the urging force mainly acting on the rotating blade 21 toward the open position, and the force of air pressing against the protrusion 22 of the rotating blade 21; The rotation stops at a position where the force generated by the pressure difference is balanced. For this reason, when the wind speed of the air passing through the passage 17 of the housing 11 increases, the force with which the air is pressed against the protrusion 22 of the rotary blade 21 increases. The rotating blade 21 rotates toward the closed position and stops until it moves to a position where the force with which the air is pressed and the biasing force are balanced. Further, when the wind speed of the air passing through the passage 17 of the housing 11 is reduced, the force with which the air is pressed against the protruding portion 22 of the rotary blade 21 is reduced. The rotary blade 21 rotates toward the open position and stops until it moves to a position where the force with which the air is pressed and the biasing force are balanced.

  Until the rotary blade 21 rotates from the open position toward the closed position, the opening degree of the passage 17 of the housing 11 increases or decreases according to the wind speed, and the inflow amount of air corresponding to the opening degree enters the indoor space 5. It is captured. The opening degree of the passage 17 of the housing 11 becomes narrower as the wind speed becomes stronger, and the inflow amount of air taken into the indoor space 5 from the outdoor space 3 is suppressed with respect to the wind speed.

  The rotary blade 21 remains stationary at the closed position when air having a wind speed faster than a predetermined upper limit wind speed, for example, 10 m / sec to 20 m / sec, passes through the passage 17. At this time, the opening degree of the passage 17 of the housing 11 is minimized, and the inflow amount of air taken into the indoor space 5 from the outdoor space 3 is greatly suppressed with respect to the wind speed. As a result, unpleasant air flow is prevented from occurring in the indoor space 5, and a comfortable indoor environment can be obtained regardless of the wind speed.

  When ventilation is not performed between the outdoor space 3 and the indoor space 5, the open / close lid 51 is moved to the closed position so that the outlet 15 of the ventilator 1 is closed. Thus, the presence / absence of the opening / closing lid 51 allows the user of the ventilation device 1 to arbitrarily switch the presence or absence of ventilation. Further, when the opening / closing lid 51 is manually opened and closed, the presence or absence of ventilation can be switched even during a power failure.

  According to the ventilator 1 according to the present embodiment, when the rotary wing 21 is in the open position, the protrusion 22 for rotating the rotary wing 21 is in the direction of the air flowing in the passage 17 with respect to the rotation center Rc. It extends along. For this reason, in the cross section of the passage 17 of the housing 11, the height of the rotary blade 21 is suppressed and the height of the cross section of the passage 17 is suppressed by the amount that the rotary blade 21 does not extend in the height direction of the passage 17. be able to. In addition, while suppressing the height dimension of the cross section of the passage 17, flow paths 18 and 19 having a height dimension capable of taking in a desired flow rate of air into the indoor space 5 when the rotary blade 21 is in the open position. It can be ensured between the inner surface of the passage 17 and the rotary blade 21. Moreover, when the protrusion part 22 of the rotary blade 21 is provided so as to extend substantially horizontally in the passage 17 extending substantially horizontally, the height of the ventilator 1 is suppressed by suppressing the height dimension of the cross section of the passage 17. Dimensions can be reduced. Furthermore, the cost can be reduced by downsizing the ventilation device 1.

  In addition, since the throttle portion 23 is provided in the first flow path 18 of the ventilation device 1, the pressure against the protruding portion 22 of the rotary wing 21 is not used without using the force that presses the wind against the rotary wing 21. The force due to the difference can be applied to rotate from the open position. For this reason, even if the protrusion 22 for rotating the rotary feather 21 is provided extending along the direction of the air flowing in the passage 17, the rotary feather 21 can be rotated from the open position.

  Further, since the urging force acting based on the positional relationship between the rotation center of the rotary wing 21 and the center of gravity is used to return the rotary wing 21 to the open position, a weight or the like is used to return the rotary wing 21 to the open position. A motor is not required, and the cost can be reduced by reducing the number of members. In addition, since a weight is not required to return the rotary wing 21 to the open position, wear caused between the rotary wing 21 and the receiving member 31 is suppressed when the rotary shaft 32 of the rotary wing 21 rotates.

  As mentioned above, although this invention was demonstrated based on embodiment, embodiment shows only the principle and application of this invention. In the embodiment, many modifications and arrangements can be made without departing from the spirit of the present invention defined in the claims.

  In the above-mentioned embodiment, although the example which applied the ventilation apparatus 1 which concerns on this invention to the building 7 was shown, you may be applied to civil engineering structures, such as a tunnel.

  Further, in the above-described embodiment, the example in which the rotating blade 21 and the rotating shaft 32 are connected by the connecting member 33 and are not continuously arranged on the same axis is shown. In the modification, the rotating blade 21 and the rotating shaft 32 may be continuously arranged coaxially as the connection member 33 is not provided.

  In the above-described embodiment, the example in which the pressure difference generating means such as the throttle portion 23 is provided in the first flow path 18 is shown. However, the pressure difference generating means is provided in the second flow path 19. May be. In this case, when rotating the rotary blade 21 from the closed position toward the open position, a biasing force toward the open position may be applied to the rotary blade 21 by a known biasing means such as a weight.

  Moreover, in the above-mentioned embodiment, when the rotary wing 21 is in the open position, the case where the protrusion 22 of the rotary wing 21 extends substantially horizontally in the passage 17 extending substantially horizontally has been described. . In the modification, the protruding portion 22 of the rotary blade 21 may be provided so as to extend substantially vertically in the passage 17 extending substantially vertically so that the air flows substantially vertically. In this modification, since the air flows substantially vertically in the passage 17 at the position where the protrusions 22 of the rotary blades 21 are provided, the protrusions 22 are also provided extending substantially vertically along the air flow. It is done.

1: Ventilator 3: Outdoor space 5: Indoor space 11: Housing 13: Inlet 15: Outlet 17: Passage 18: First flow path 19: Second flow path 21: Rotating feathers 22: Projection part 23: Restriction part 25 : Engaging portion 31: bearing 32: rotating shaft 33: connecting member 41: first rotating stopper 43: second rotating stopper 51: open / close lid Rc: center of rotation Gc: center of gravity

Claims (8)

A ventilation device for ventilating between an outdoor space and an indoor space,
A housing having an inflow opening that opens toward the outdoor space, an outflow opening that opens toward the indoor space, and a passage from the inflow port to the outflow port;
The opening of the passage changeably provided by rotating in the passage, when in the open position opening the passageway, the extends along the direction of air flowing through the passage with respect to the rotation center A rotating blade provided with a protrusion extending from the center of rotation toward the inflow port;
A throttle provided in at least one of the flow paths formed between the rotary wings and the housing ,
The ventilator characterized in that the throttle part is provided over the entire length of the rotary wing . A ventilation device for ventilating between an outdoor space and an indoor space,
A housing having an inflow opening that opens toward the outdoor space, an outflow opening that opens toward the indoor space, and a passage from the inflow port to the outflow port;
The opening of the passage changeably provided by rotating in the passage, when in the open position opening the passageway, the extends along the direction of air flowing through the passage with respect to the rotation center A rotating blade provided with a protrusion extending from the center of rotation toward the inflow port;
A pressure difference generating means provided in a first flow path of the first flow path and the second flow path formed by partitioning the passage by the rotary blade ,
The pressure difference generating means generates a pressure difference between a location upstream of the first flow path and the second flow path from the pressure difference generating means when air passes from the inlet to the passage. The ventilator is characterized in that the protrusion is rotated from the open position . The ventilation apparatus according to claim 1 or 2 , wherein when the rotary wing is in an open position, a gravity center due to its own weight is arranged below the rotation center. A rotating shaft rotatably supported with respect to the housing;
The ventilation apparatus according to any one of claims 1 to 3, further comprising a connecting member that connects the rotating shaft and the rotating wing. A rotation restricting means for restricting rotation of the rotary blade from the closed position to close the passage toward the open position;
The rotating vane, when in the open position, according to any one of claims 1 to 4, characterized in that the engagement portion to be engaged from below are provided for the rotation restriction means Ventilation device. When the rotary blade is in a closed position for closing the passage, the rotary blade is provided at a position away from an axis passing through the rotation center of the rotary blade, and between the rotary blade and at least one of the inner surfaces of the passage facing each other The ventilator according to any one of claims 1 to 5 , wherein a gap is provided in the air vent. The ventilator according to any one of claims 1 to 6 , further comprising an open / close lid provided to be capable of opening and closing the outlet.   When the horizontal direction from the wall to which the ventilator is mounted to each of the indoor space and the outdoor space is the first direction,
  The inflow opening is provided to open in the first direction;
  The outlet is provided to open in a direction orthogonal to the first direction,
  When the rotary blade is in the open position, the rotary blade is positioned away from the inlet in the first direction on a surface facing the outlet on the side opposite to the inlet with respect to the center of rotation. The ventilator according to any one of claims 1 to 7, wherein a slope is provided so as to approach the outlet as it goes to a side opposite to the inlet.

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