JP6481932B2 - Ventilation device and ventilation system - Google Patents

Description

  The present invention relates generally to ventilation devices and ventilation systems. The present invention relates to a ventilation device and a ventilation system for performing ventilation between outdoors and indoors in more detail.

  Conventionally, there is a ventilator using an impeller having a plurality of blades (see, for example, Patent Document 1). The ventilator of this patent document 1 discharges indoor air outdoors by rotating an impeller.

  In the ventilation device of Patent Document 1, when the impeller is viewed from above, a plurality of blades are arranged so that no gap is generated between adjacent blades. That is, each outer peripheral edge of the plurality of blades is substantially circular in plan view. Therefore, when the impeller is viewed from above, the opening of the ventilation device is covered with a plurality of blades.

JP 2013-36620 A

  However, in the ventilation device of Patent Document 1, there is always a vertical gap between adjacent blades, and rainwater may enter the indoor side from the gap along the surface of the blade.

  This invention is made | formed in view of the said reason, The objective is to provide the ventilation apparatus and ventilation system which can interrupt | block the infiltration path | route of the rainwater to the indoor side.

The ventilation device of the present invention includes a case having a hollow storage space, and a rotating body that is disposed in the storage space and rotates in one direction, and the rotating body includes a plurality of blades arranged in the rotation direction. The storage space is divided into a first region and a second region separated by one straight line passing through the rotation center of the rotating body in a cross section orthogonal to the rotation axis direction of the rotating body, The region communicates with the outside of the case through each of the first opening and the second opening formed in the case, and the surface surrounding the storage space in the case is between the first opening and the second opening. One or more blades positioned in the second region between the first inner surface where the tips of the one or more blades located in the first region always contact each other and the first opening and the second opening and a second inner surface tip of constant contact, before Each of the first opening and the second opening and having a function of both the flow of air and exhaust.

  The ventilation system of the present invention includes the above-described ventilation device in which the first opening communicates outdoors and the second opening communicates indoors, and an exhaust device that exhausts indoor air to the outdoors. To do.

  As described above, the ventilation device and the ventilation system of the present invention have an effect of blocking the rainwater intrusion route to the indoor side.

It is a block diagram which shows the principal part of the ventilation apparatus of Embodiment 1. It is an external view which shows the whole structure of the ventilation apparatus of Embodiment 1, FIG. 2A shows a top view, FIG. 2B shows a front view, and FIG. 2C shows a rear view, respectively. It is the schematic which shows attachment of the ventilation apparatus of Embodiment 1. FIG. It is sectional drawing seen from the side which shows arrangement | positioning of the ventilation apparatus of Embodiment 1. FIG. FIG. 5A is a plan view showing a case of the first embodiment, and FIG. 5B is a plan view showing a rotating body of the first embodiment. 6A is a front view of a case in which the rotating body of Embodiment 1 is accommodated, and FIG. 6B is a rear view of the case in which the rotating body of Embodiment 1 is accommodated. It is the schematic which shows the structure of the ventilation system of Embodiment 1. FIG. It is an external view which shows the whole structure of the ventilation apparatus of Embodiment 2, FIG. 8A shows a top view, FIG. 8B shows a front view, and FIG. 8C shows a rear view, respectively. It is a block diagram which shows the principal part of the ventilation apparatus of Embodiment 2. It is a front view which shows the whole structure of the ventilation apparatus of Embodiment 3. FIG. 11A is a cross-sectional view of the main part of the ventilator of Embodiment 3 as viewed from the front, and FIG. 11B is a cross-sectional view of the main part of the ventilator of Embodiment 3 as viewed from above.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows the configuration (horizontal cross section) of the main part of the ventilator 1 in the present embodiment, and FIGS. 2A, 2B, and 2C show the overall configuration of the ventilator 1. FIG. 2A is a top view, FIG. 2B is a front view, and FIG. 2C is a rear view.

  The ventilation apparatus 1 is installed in the ventilation opening 2 of the building 8 as shown in FIGS. 3 and 4 and performs ventilation for exchanging air between the outside (outside the building 8) and the inside (inside the building 8). The building 8 may be a detached house, a dwelling unit of an apartment house, an office, a store, or the like, and the type of the building 8 is not limited.

  The ventilation apparatus 1 includes a case unit 10 as shown in FIGS. 2A, 2B, and 2C.

  The case unit 10 includes a frame body 11 fitted into the ventilation port 2 and a plurality of cases 12 supported by the frame body 11.

  The frame 11 is formed in a rectangular frame shape having an upper frame 11a, a lower frame 11b, and side frames 11c, 11d. The case 12 is formed in a hollow cylindrical shape, the upper end of the case 12 is held by the upper frame 11a, and the lower end of the case 12 is held by the lower frame 11b. And between the side frame 11c and the side frame 11d, the some case 12 is arrange | positioned along with the horizontal direction (direction orthogonal to an up-down direction). At this time, each outer surface of the plurality of cases 12 is arranged so as to be sandwiched between the adjacent cases 12 so as to be in contact with the outer surfaces of the adjacent cases 12 on both sides. The case 12 positioned at one end in the horizontal direction is disposed between the adjacent case 12 and the side frame 11c, and the case 12 positioned at the other end in the horizontal direction includes the adjacent case 12 and the side frame 11d. It is placed between. That is, the plurality of cases 12 are arranged adjacent to each other so as to close the opening of the frame body 11. The coupling of the case 12 to the upper frame 11a and the lower frame 11b can be realized by fitting with protrusions and holes, fastening using screws or the like, and integrally forming the frame body 11 and the case 12.

  As shown in FIG. 5A, the case 12 includes a case main body 120 formed in a hollow cylindrical shape, and a storage space 121 having a circular horizontal cross section is formed inside the case main body 120 (see FIG. 5A). 1).

  In the storage space 121, the rotating body 20 shown in FIG. 5B is stored. 6A is a front view of the case 12 in which the rotating body 20 is stored, and FIG. 6B is a rear view of the case 12 in which the rotating body 20 is stored. The rotating body 20 is disposed in the vertical direction so that the rod-shaped rotating shaft 20a is positioned at the center of the storage space 121 having a circular horizontal cross section. The upper end side of the rotating shaft 20a is pivotally supported by a bearing provided at the upper end of the case body 120, and the lower end side of the rotating shaft 20a is pivotally supported by a bearing provided at the lower end of the case body 120. 20a can rotate around the axis. The bearing that supports the rotating shaft 20a preferably uses a bearing or the like to reduce rotational resistance.

  A plurality of blades 20b are integrally attached to the rotating shaft 20a, and as shown in FIG. 1, each of the plurality of blades 20b is arranged at equal intervals in the circumferential direction of the rotating shaft 20a. The base of the blade 20b is connected to the rotating shaft 20a. The rotating body 20 in FIG. 1 includes six blades 20b. FIG. 1 corresponds to the AA cross section of FIG. 6A.

  As shown in FIG. 1, the storage space 121 of the case 12 is divided into a first area 121a and a second area 121b. Specifically, in the horizontal cross section of the storage space 121 (cross section orthogonal to the rotation axis direction of the rotating body 20), the circular storage is performed with the straight line 9 passing through the rotation center of the rotating body 20 (the center of the rotating shaft 20a) as a boundary. The space 121 is divided into a first area 121a and a second area 121b. The first area 121 a and the second area 121 b are each semicircular in the horizontal cross section of the storage space 121. The straight line 9 has one end extending outward and the other end extending indoors.

  A first opening 122 and a second opening 123 are formed in the case main body 120. The first opening 122 is formed from the boundary between the first region 121 a and the second region 121 b to the first region 121 a side on the outdoor side of the case body 120, and the outdoor space passes through the first opening 122. To the first region 121a. The second opening 123 is formed on the indoor side of the case body 120 from the boundary between the first region 121a and the second region 121b to the first region 121a side, and the first region 121a is the second opening. 123 to the indoor space. That is, the first opening 122 and the second opening 123 are formed so as to communicate with the first region 121a.

  The case main body 120 has a semicircular arc-shaped first wall 120a facing the first region 121a and a semicircular arc-shaped first facing the second region 121b between the first opening 122 and the second opening 123. A two-wall body 120b is provided. The inner side surface (first inner surface 124) of the first wall body 120a and the inner side surface (second inner surface 125) of the second wall body 120b form a part of the circumference of the same circle. The radius is the same size (or almost the same size) as the rotational radius of the tip 20d of the blade 20b. The tip 20d of the rotating blade 20b rotates while contacting the first inner surface 124 when passing through the first wall body 120a. The tip 20d of the rotating blade 20b rotates while contacting the second inner surface 125 when passing through the second wall 120b.

  By forming, for example, a fluororesin film on the tip 20d of the blade 20b, the friction coefficient between the tip 20d and the first inner surface 124 and the second inner surface 125 is reduced. Therefore, the rotator 20 can rotate smoothly using the natural wind outdoors while bringing the tip 20d of the blade 20b into contact with the first inner surface 124 and the second inner surface 125. It is also possible to reduce the friction coefficient between the first inner surface 124 and the second inner surface 125 by providing a roller or the like at the tip 20d. In addition, as a method of reducing the friction coefficient between the tip 20d and the first inner surface 124 and the second inner surface 125, other methods may be used as long as the rotating body 20 can rotate using outdoor natural wind.

  Further, the friction coefficient between the tip 20d, the first inner surface 124, and the second inner surface 125 can be reduced by forming, for example, a fluororesin film on each of the first inner surface 124 and the second inner surface 125.

  Furthermore, it is preferable that a ratchet mechanism (reverse rotation prevention mechanism) is provided on the bearing of the rotary shaft 20a so that the rotary shaft 20a rotates only in the X direction (counterclockwise in FIG. 1).

  When natural wind is generated outdoors and air flows from the first opening 122 toward the first region 121a, the blade 20b is rotated in the X direction by the force of the wind. Outdoor air flows into the fan-shaped space sandwiched between two adjacent blades 20b through the first opening 122 when passing through the first opening 122, and the rotating body 20 rotates, so that the outdoor air flows. The air is carried to the second opening 123 and outdoor air flows into the indoor through the second opening 123. Furthermore, indoor air flows into the fan-shaped space sandwiched between two adjacent blades 20b through the second opening 123 when passing through the second opening 123, and the rotating body 20 rotates, so that Air is conveyed to the first opening 122, and indoor air is discharged to the outdoors through the first opening 122.

  In the present embodiment, after the blade 20 b passes through the first opening 122, the tip 20 d of the blade 20 b rotates while contacting the first inner surface 124 and reaches the second opening 123. In addition, after the blade 20 b passes through the second opening 123, the tip 20 d of the blade 20 b rotates while contacting the second inner surface 125 and reaches the first opening 122.

  In addition, the arrangement interval (arrangement angle) of the blades 20b is set to be shorter than the arc length of the first wall body 120a (smaller than the central angle of the first wall body 120a), and the tip 20d of one or more blades 20b is , Is always in contact with the first inner surface 124. Further, since the arc length of the second wall body 120b is longer than the arc length of the first wall body 120a, the tip 20d of one or more blades 20b is always in contact with the second inner surface 125 as well.

  Therefore, the rain that falls outdoors blocks the intrusion path to the indoor side by the blades 20 b that are in contact with the first inner surface 124. In addition, rain that falls outdoors can also block the infiltration path to the indoor side by the blades 20 b that are in contact with the second inner surface 125. In other words, the ventilation device 1 blocks the rainwater intrusion path to the indoor side by the blade 20b in contact with the first inner surface 124 and the blade 20b in contact with the second inner surface 125, and the rainwater to the indoor side. Can be prevented from entering.

  The ventilator 1 described above includes a case 12 having a hollow storage space 121 and a rotating body 20 that is disposed in the storage space 121 and rotates in the X direction (one direction). The rotating body 20 includes a plurality of blades 20b arranged in the rotation direction. The storage space 121 is divided into a first area 121a and a second area 121b that are separated by one straight line 9 passing through the rotation center of the rotating body 20 in a cross section (horizontal section) orthogonal to the rotation axis direction of the rotating body 20. The The first region 121 a communicates with the outside of the case 12 through each of the first opening 122 and the second opening 123 formed in the case 12. A surface surrounding the storage space 121 in the case 12 includes a first inner surface 124 and a second inner surface 125. The tip 20d of one or more blades 20b located in the first region 121a is always in contact with the first inner surface 124 between the first opening 122 and the second opening 123. The tip 20d of one or more blades 20b located in the second region 121b is always in contact with the second inner surface 125 between the first opening 122 and the second opening 123.

  Therefore, the ventilation apparatus 1 can block the intrusion path of rainwater to the indoor side by the blades 20b in contact with the first inner surface 124 and the blades 20b in contact with the second inner surface 125.

  Further, a barb 20e is formed at the tip 20d of the blade 20b. The barb portion 20e is formed in a curved shape (U shape) in which the end of the blade 20b is bent in the direction opposite to the rotation direction X (clockwise in FIG. 1). The water droplets adhering to the nozzle 20b move to the tip side of the blade 20b due to the centrifugal force generated when the blade 20b rotates, and the water droplet that has reached the barb portion 20e is received at the bottom of the barb portion 20e, so that the water droplet is outside the blade 20b. Scattering can be suppressed, and infiltration of rainwater to the indoor side can be further suppressed.

  That is, it is preferable that the tip 20d of each of the plurality of blades 20b is formed with a barb portion 20e bent in a direction opposite to the X direction. Therefore, the ventilator 1 can further suppress the intrusion of rainwater into the indoor side.

  Further, the water droplets accumulated in the barb portion 20e flow down along the surface of the blade 20b, and are drained out of the ventilator 1 through the drainage groove provided in the lower frame 11b.

  Moreover, as shown in FIG. 7, it is also preferable to provide the building 8 with the exhaust apparatus 4 which discharges indoor air to the outdoors. In this case, the ventilation device 1 and the exhaust device 4 constitute a ventilation system. FIG. 7 is a cross-sectional view of the building 8 as viewed from above.

  The exhaust device 4 is, for example, a ventilation fan or a range hood provided with a fan, and exhausts indoor air to the outdoors by rotating the fan. Therefore, negative pressure is generated indoors due to the operation of the exhaust device 4, and the amount of air flowing from the first opening 122 (outdoor) toward the second opening 123 (indoor) increases, thereby causing the blade 20 b facing the first opening 122 to move. The applied force in the X direction increases, and the rotating body 20 easily rotates in the X direction.

  Moreover, it is preferable that the exhaust apparatus 4 is attached indoors to the wall surface facing the wall surface to which the ventilation apparatus 1 is attached. In this case, since the air flow generated between the ventilation device 1 and the exhaust device 4 is generated in a wide indoor range, the ventilation efficiency can be improved.

  As described above, the ventilation system preferably includes the ventilation device 1 and the exhaust device 4. In this case, in the ventilator 1, the first opening 122 communicates outdoors and the second opening 123 communicates indoors. The exhaust device 4 exhausts indoor air to the outdoors.

  Therefore, the above-described ventilation system can forcibly generate an air flow that rotates the rotating body 20 in the X direction even when outdoor natural wind is weak, and ventilation can be performed.

  Moreover, the ventilation apparatus 1 may use the case which accommodates the several rotary body 20 collectively other than the case 12 which accommodates the rotary body 20 separately as mentioned above. In this case, one case accommodates the plurality of rotating bodies 20, and a plurality of first openings 122 and a plurality of second openings 123 corresponding to the plurality of rotating bodies 20 are provided.

(Embodiment 2)
8A, 8B, and 8C show the overall configuration of the ventilator 1A of the present embodiment, and FIG. 9 shows the configuration (horizontal cross section) of the main part of the ventilator 1A. 8A is a top view, FIG. 8B is a front view, and FIG. 8C is a rear view. Moreover, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and description is abbreviate | omitted.

  The ventilation device 1A includes a case unit 10A and a rotating body 20A.

  The case unit 10 </ b> A includes a case 12 </ b> A instead of the case 12 of the first embodiment, and a plurality of cases 12 </ b> A are arranged adjacent to each other so as to close the opening of the frame body 11.

  The case 12A includes a case main body 120A formed in a hollow cylindrical shape, and a storage space 121A is formed inside the case main body 120A (see FIG. 9). The rotating body 20A is stored in the storage space 121A.

  As shown in FIG. 9, in the rotating body 20A, a plurality of blades 20i are integrally attached to the rotation shaft 20h, and each of the plurality of blades 20i is arranged at equal intervals in the circumferential direction of the rotation shaft 20h. The base of the blade 20i is connected to the rotating shaft 20h. Note that the rotating body 20A of FIG. 9 includes six blades 20i.

  The blade 20i includes two blade pieces 20n and 20p and a bent portion 20m provided between the blade pieces 20n and 20p as a variable mechanism. The blade pieces 20n and 20p are arranged side by side in the rotational radial direction of the blade 20i. The blade piece 20n is integrally attached to the rotary shaft 20h, and the blade piece 20p includes a tip 20k of the blade 20i. The blade piece 20n and the blade piece 20p are connected via a bent portion 20m. The bent portion 20m pivotally supports both the blade pieces 20n and 20p with one rotating shaft. Then, the blade 20i is bent by rotating the blade 20p with respect to the blade 20n connected to the rotating shaft 20h.

  That is, the blade 20i (the blade body) is divided in the direction of the rotation diameter, and two blade pieces 20n and 20p are formed. The bent portion 20m is provided between two adjacent blade pieces 20n and 20p, and bends between the two blade pieces 20n and 20p. The blade 20i may be divided into three or more blade pieces, and a bent portion may be provided between each two adjacent blade pieces.

  Further, the bent portion 20m includes an elastic body such as a spring that biases a restoring force (elastic force) in the Y1 direction (counterclockwise in FIG. 9) with respect to the blade piece 20p. Normally, the restoring force in the Y1 direction acts on the blade piece 20p, and the blade 20i is not bent. The bent portion 20m includes a stopper or the like that restricts the rotation of the blade piece 20p in the Y1 direction. The blade piece 20p that rotates in the Y1 direction can be rotated to a position that forms the same plane as the blade piece 20n. It becomes. Then, the blade piece 20p is bent by rotating the blade piece 20p in the Y2 direction (the opposite direction to the Y1 direction) against the restoring force described above.

  As shown in FIG. 9, the storage space 121A of the case 12A is divided into a first area 121c and a second area 121d. Specifically, in the horizontal cross section of the storage space 121A (the cross section orthogonal to the rotation axis direction of the rotating body 20A), the storage space 121A is bounded by a straight line 9A passing through the rotation center of the rotating body 20A (center of the rotating shaft 20h). The first area 121c and the second area 121d are divided. In the horizontal cross section of the storage space 121A, the first region 121c has a semicircular shape, and the second region 121d has a flat shape in which the semicircle is crushed. The straight line 9 </ b> A has one end side extending outward and the other end side extending indoors.

  A first opening 122A and a second opening 123A are formed in the case main body 120A. The first opening 122A is formed from the boundary between the first region 121c and the second region 121d to the first region 121c side on the outdoor side of the case body 120A, and the outdoor space passes through the first opening 122A. To the first region 121c. The second opening 123A is formed on the indoor side of the case main body 120A from the boundary between the first region 121c and the second region 121d to the first region 121c side, and the first region 121c is the second opening. It passes through the indoor space through 123A. That is, the first opening 122A and the second opening 123A are formed so as to communicate with the first region 121c.

  The case main body 120A includes a first wall 120c facing the first region 121c and a second wall 120d facing the second region 121d between the first opening 122A and the second opening 123A.

  The inner side surface (first inner surface 124A) of the first wall body 120c is formed in an arc shape (inferior arc). The distance from the rotation center of the rotating body 20A to the first inner surface 124A has the same dimension (or almost the same dimension) as the rotation radius (maximum rotation radius) of the blade 20b that is not bent. That is, the blade 20i passing through the first region 121c is not bent, and the blade piece 20n and the blade piece 20p constitute the same plane. The tip 20k of the blade 20i that passes through the first wall 120c is in contact with the first inner surface 124A.

  The inner side surface (second inner surface 125A) of the second wall body 120d is a curved surface whose distance to the rotation center of the rotating body 20A is not constant. In the second inner surface 125A, the distance to the rotation center of the rotating body 20A gradually decreases from the end on the second opening 123A side, and is the shortest near the center. Then, as the second inner surface 125A approaches the end portion on the first opening 122A side, the distance to the rotation center of the rotating body 20A gradually increases. That is, when the tip 20k of the blade 20i passing through the second region 121d contacts the second inner surface 125A, the blade piece 20p rotates in the Y2 direction with respect to the blade piece 20n, and the blade 20i is bent. While the blade 20i passes through the second region 121d, the tip 20k is bent while maintaining the state along the second inner surface 125A. When the blade 20i moves from the second region 121d to the first region 121c, the blade piece 20p is moved in the Y1 direction with respect to the blade piece 20n by the restoring force in the Y1 direction applied to the blade piece 20p by the bent portion 20m. And the blades 20i return to the unbent state.

  In the present embodiment, after the blade 20i passes through the first opening 122A, the tip 20k of the blade 20i rotates while contacting the first inner surface 124A, and reaches the second opening 123A. In addition, after the blade 20i passes through the second opening 123A, the tip 20k of the blade 20i rotates while contacting the second inner surface 125A, and reaches the first opening 122A.

  Further, the arrangement interval (arrangement angle) of the blades 20i is set shorter than the arc length of the first wall body 120c (smaller than the central angle of the first wall body 120c), and the tip 20k of one or more blades 20i is The first inner surface 124A is always in contact. Further, since the arc length of the second wall 120d is longer than the arc length of the first wall 120c, the tip 20k of one or more blades 20i is always in contact with the second inner surface 125A.

  Therefore, the rain that falls outdoors is blocked by the blades 20i that are in contact with the first inner surface 124A. In addition, rain that falls outdoors can also block the infiltration path to the indoor side by the blades 20i that are in contact with the second inner surface 125A. That is, the ventilation device 1A blocks the rainwater intrusion path to the indoor side by the blade 20i that is in contact with the first inner surface 124A and the blade 20i that is in contact with the second inner surface 125A. Can be blocked.

  Further, the ventilator 1A has the volume of the second region 121d in the case 12A smaller than the volume of the first region 121c, and the amount of air exhausted from the indoor to the outdoor is the amount of air that is sucked from the outdoor to the indoor Less. That is, indoor air whose air quality is adjusted by an air conditioner, an air purifier or the like is prevented from being exhausted to the outdoors more than necessary. The air whose air quality has been adjusted is air in which temperature and humidity are adjusted, and furthermore, contamination factors such as particulate matter such as PM2.5, pollen and house dust are reduced.

  In the ventilator 1A described above, the first inner surface 124A is preferably formed in an arc shape so that the distance from the rotation center of the rotating body 20A is constant. Moreover, it is preferable that at least a part of the second inner surface 125A is formed such that the distance between the rotation center and the first inner surface 124A is shorter than the distance between the first inner surface 124A and the rotation center. In this case, each of the plurality of blades 20i includes a variable mechanism that changes the distance from the tip 20k to the center of rotation by moving the tip 20k along the second inner surface 125A.

  Therefore, the ventilator 1A can suppress indoor air whose air quality is adjusted by an air conditioner, an air cleaner, or the like from being exhausted to the outdoors more than necessary.

  The variable mechanism described above is provided between a plurality of blade pieces 20n, 20p obtained by dividing each of the plurality of blades 20i in the rotational radial direction and two adjacent blade pieces 20n, 20p, and the two blade pieces 20n. , 20p is preferably provided with a bent portion 20m.

  Therefore, the bending structure of the blade 20i can be realized, and the distance from the rotation center to the tip 20k of the blade 20i can be easily changed. The variable mechanism of the present embodiment realizes a bent structure of the blade 20i by using a bent portion 20m having a rotation axis. However, the variable mechanism is not limited to the structure. For example, the blade itself may be bent by forming the blade with a material having spring elasticity, and the tip of the blade abuts against the second inner surface 125A. Furthermore, the blades may be configured to be expandable and contractable in the rotational radial direction, and the blades may be contracted in the rotational radial direction by the tips of the blades contacting the second inner surface 125A.

  Further, by forming, for example, a fluororesin film on the tip 20k of the blade 20i, the friction coefficient between the tip 20k and the first inner surface 124A and the second inner surface 125A is reduced. Therefore, the rotator 20A can smoothly rotate using the outdoor natural wind efficiently while bringing the tip 20k of the blade 20i into contact with the first inner surface 124A and the second inner surface 125A. It is also possible to provide a roller or the like at the tip 20k to reduce the friction coefficient between the first inner surface 124A and the second inner surface 125A. A method for reducing the friction coefficient between the tip 20k, the first inner surface 124A, and the second inner surface 125A may be other than the above, as long as the rotating natural body 20A can efficiently use outdoor natural wind.

  Furthermore, it is preferable that the rotating shaft 20h includes a latch mechanism so as to rotate only in the X direction (counterclockwise in FIG. 9).

  Further, a barb 20r is formed at the tip 20k of the blade 20i. The barbed portion 20r is formed in a curved shape (U-shape) in which the end of the blade 20i is bent in the direction opposite to the X direction which is the rotation direction (clockwise in FIG. 9). The water droplets adhering to the tip 20c move to the tip side of the blade 20i due to the centrifugal force generated when the blade 20i rotates, and the water droplet that has reached the barb portion 20r is received by the bottom of the barb portion 20r. Scattering can be suppressed, and infiltration of rainwater to the indoor side can be further suppressed.

  That is, it is preferable that the tip 20k of each of the plurality of blades 20i is formed with a barb portion 20r bent in the direction opposite to the X direction. Therefore, the ventilation device 1A can further suppress the intrusion of rainwater into the indoor side.

(Embodiment 3)
FIG. 10 shows the overall configuration of the ventilator 1B of the present embodiment, and FIGS. 11A and 11B show the configuration of the main part of the ventilator 1B. 11A is a cross-sectional view of the upper frame 11a of the frame body 11 as viewed from the front, and FIG. 11B is a cross-sectional view of the upper frame 11a as viewed from above. Moreover, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and description is abbreviate | omitted.

  The ventilation device 1B is configured by adding a drive unit 3 to the ventilation device 1. The drive unit 3 is housed in the upper frame 11 a of the frame 11, and includes a motor 31, a speed reducer 32, and a drive belt 33. The motor 31 is driven by using a commercial power source or a battery as a power source, and the speed reducer 32 generates a rotational force that reduces the rotational speed of the motor using a gear or the like on the output shaft 32a. The output shaft 32 a is in contact with the inner peripheral surface of the drive belt 33, and the rotational force of the motor 31 is transmitted to the drive belt 33 via the speed reducer 32. The inner peripheral surface of the drive belt 33 is also on the outer periphery on the upper end side of each of the plurality of rotating shafts 20a protruding into the upper frame 11a. In other words, the drive belt 33 connects the output shaft 32a and the plurality of rotating shafts 20a to rotate each of the plurality of rotating shafts 20a by the rotational driving force of the motor 31. The blade 20 b of the rotating body 20 is rotated in the X direction by the rotational driving force of the motor 31.

  A toothed belt having teeth formed on the inner peripheral surface is used as the drive belt 33. On the outer periphery of the rotary shaft 20a, protrusions that mesh with the teeth of the drive belt 33 are arranged side by side in the circumferential direction. The rotating shaft 20a can be meshed with each other. The structure for transmitting the driving force of the drive belt 33 to the rotary shaft 20a is not limited to this structure, and other structures may be used.

  As described above, the ventilator 1B preferably includes the drive unit 3 that rotates the rotating body 20 in the X direction. In this case, the ventilation device 1 </ b> B can perform forced ventilation using the rotational driving force of the motor 31.

  Moreover, the forced ventilation using the drive part 3 is applicable also to the ventilation apparatus 1A of Embodiment 2. FIG.

  Moreover, the structure of the ventilation system using the exhaust apparatus 4 of Embodiment 1 is applicable also to the above-mentioned Embodiments 2 and 3.

1, 1A, 1B Ventilator 10, 10A Case unit 11 Frame body 12, 12A Case 120, 120A Case body 120a, 120c First wall body 120b, 120d Second wall body 121, 121A Storage space 121a, 121c First region 121b , 121d Second region 122, 122A First opening 123, 123A Second opening 124, 124A First inner surface 125, 125A Second inner surface 20, 20A Rotating body 20a, 20h Rotating shaft 20b, 20i Blade 20d, 20k Tip 20e, 20r Back part 20m Bent part 3 Drive part 9, 9A Straight line

Claims (6)

A case having a hollow storage space;
A rotating body arranged in the storage space and rotating in one direction,
The rotating body includes a plurality of blades arranged in a rotation direction,
The storage space is divided into a first region and a second region separated by one straight line passing through the rotation center of the rotating body in a cross section orthogonal to the rotation axis direction of the rotating body,
The first region communicates with the outside of the case through each of a first opening and a second opening formed in the case,
The surface surrounding the storage space in the case includes a first inner surface where the tips of one or more blades located in the first region are always in contact between the first opening and the second opening; A second inner surface that is always in contact with a tip of one or more blades located in the second region between the first opening and the second opening ;
Each of said 1st opening and said 2nd opening has the function of both inflow and discharge | emission of air, The ventilation apparatus characterized by the above-mentioned. The first inner surface is formed in an arc shape so that a distance from the rotation center is constant,
At least a part of the second inner surface is formed such that a distance between the rotation center and the first inner surface is shorter than a distance between the first inner surface and the rotation center.
2. The ventilation device according to claim 1, wherein each of the plurality of blades includes a variable mechanism that changes a distance from the tip to the rotation center when the tip moves along the second inner surface. .   The variable mechanism includes a plurality of blade pieces obtained by dividing each of the plurality of blades in a radial direction, and a bent portion provided between two adjacent blade pieces to bend between the two blade pieces. The ventilation apparatus according to claim 2, wherein the ventilation apparatus is provided.   The ventilator according to any one of claims 1 to 3, wherein a tip of each of the plurality of blades is formed with a barb portion bent in a direction opposite to the one direction.   The ventilation apparatus according to any one of claims 1 to 3, further comprising a drive unit that rotates the rotating body in the one direction.   The ventilator according to any one of claims 1 to 5, wherein the first opening communicates outdoors and the second opening communicates indoors, and an exhaust device that exhausts the indoor air to the outdoors. Ventilation system to do.

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