JP2015111022A - Ventilation damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation damper that enables specific amount of air to flow on an indoor side by using an air flow regardless of a change in flow speed of the air flow in a passage, that can naturally close the passage by using an air flow when the air flow having a certain level or higher of flow speed is generated in the passage caused by a large atmospheric pressure difference between the indoor and outdoor sides, that thus can prevent generation of an uncomfortable air flow on the indoor side and prevent outdoor dust from being brought into the indoor side, that enables reduction in air conditioning electric power consumption and that can prevent unfavorable rotation stop of a fin.SOLUTION: A ventilation damper 1 includes: a frame 7 inside of which includes a passage 6 having an inlet hole 3 opened on an outdoor side 2 and an outlet hole 5 opened on an indoor side 4; a fin 8 arranged rotatably in a direction R about an axial center O1 within the frame 7 so as to be rotatable between a passage opening position and a passage closing position; and rotating means 9 for forcedly rotating the fin 8 at the passage closing position.

Description

  The present invention relates to a ventilation damper that is attached to these walls or the like and controls the degree of ventilation for ventilation between indoors and outdoors such as office buildings, apartment houses, detached houses, and warehouses.

  Usually, in this type of ventilation damper, fins are rotatably arranged in a frame that defines the passage, the fin is rotated by an air flow passing through the passage, and the opening degree of the passage is determined by rotation of the fin, The amount of ventilation through the passage is controlled to be constant.

  In such a ventilation damper, if a large air pressure difference occurs outside the room due to a wind speed of a certain level or more outside in the outdoor state when the passage is open, air is led to the room more than necessary through the passage. An unpleasant air flow is generated in the room, dust outside the room is brought into the room, and a state in which the room is set to a predetermined temperature is greatly disturbed, and an increase in air-conditioning power consumption is caused to correct this. Such an unfavorable situation may occur.

  In order to avoid such a situation, Patent Document 1 is constantly urged to rotate toward the passage opening position, while being rotated to the passage closing position by the air flow passing through the passage. A ventilation damper with a fin is described.

JP 2001-22492 A

  By the way, according to the ventilation damper described in Patent Document 1, uncomfortable airflow can be prevented from occurring in the room, dust from outside can be prevented from being brought into the room, and power consumption of the air conditioning can be reduced. However, in the ventilation damper as long as it is explicitly described in the figure of Patent Document 1, since the shaft portion of the fin crosses the passage, the side portion that ensures the sealing at both ends of the shaft portion As a result of the provision of the blocking member, there is a risk that the rotation of the fin in a constant air flow ventilation state may be hindered by interference (sliding resistance) with both ends of the side blocking member due to the rotation of the fin. When the fin is rotated to the passage closed position in the air volume ventilation state, there is a possibility that a situation may occur in which the fin is not rotated to the passage open position due to such interference.

  The present invention has been made in view of the above-described points, and an object of the present invention is to flow a certain amount of air into a room using an air flow regardless of a change in the flow velocity of the air flow in the passage. In addition, when a large air pressure difference occurs outside the room and an air flow with a flow rate higher than a certain level is generated in the passage, the air flow can be used to naturally block the passage, thus causing uncomfortable indoors. Provided is a ventilation damper that can prevent air flow from occurring and can eliminate the entry of outdoor dust into the room, reduce air-conditioning power consumption, and cause no inadvertent stopping of fins. There is.

  A ventilation damper according to the present invention includes a frame having a passage having an inlet hole and an outlet hole, and fins rotatably supported by the frame so as to be rotatable between a passage opening position and a passage closing position. The fin includes a shaft portion that is rotatably supported by both ends of the frame, and a fin body portion that extends from the shaft portion to one side in the radial direction and is provided on the shaft portion and is disposed in the frame. The fin body portion is configured to impart a rotational moment around the shaft portion in the direction toward the passage blockage position to the shaft portion by the air flow passing through the passage. When the fin is rotated to the passage closing position, a rotational moment is given around the shaft portion in the direction toward the passage opening position by the weight of the portion or by the weight provided on the shaft portion. The whole It is adapted to blockage in the main body portion.

  According to the ventilation damper according to the present invention, when the fin is rotated to the passage closing position, the entire passage is closed by the fin main body portion, so that the shaft portion can be arranged away from the passage. It is possible to omit the side closing member that secures the sealing performance at both ends of the shaft portion, and thus, it is possible to avoid interference (sliding resistance) on both ends of the shaft portion by the side portion closing member, and the disadvantage of the fin In addition to preventing rotation stop, the fin body portion of the fin that is rotatably arranged in the frame so as to be able to rotate between the passage opening position and the passage closing position is directed toward the passage closing position by the air flow passing through the passage. A rotational moment around the shaft portion is applied to the shaft portion, and the shaft portion has a direction toward the passage opening position by the weight of the fin body portion or by the weight provided on the shaft portion. Rotational moment around the shaft Therefore, by appropriately setting the magnitude of the rotational moment around the shaft portion in the direction toward the passage opening position, a large atmospheric pressure difference is generated between the inlet hole and the outlet hole, so that the passage exceeds a certain level. When an air flow having a flow velocity, for example, an air flow of 3 m / sec or more is generated, the fin main body can be rotated naturally to the passage closed position by using this air flow, and thus the passage is blocked by a strong wind or the like. The air can be prevented from being unnecessarily introduced into the room from the outlet hole through the outlet hole, and uncomfortable airflow can be prevented from occurring in the room, and dust from outside can be prevented from being brought into the room through the passage. Moreover, the air conditioning state in the room is not greatly disturbed, and the power consumption of the air conditioning can be reduced.

  In the ventilation damper of the present invention, the shaft portion may extend in the horizontal direction, or alternatively, may extend in the vertical direction, and the shaft portion extending in the horizontal direction has a dead weight of the fin body portion. A rotational moment in the direction toward the passage opening position may be applied, and a rotational moment in the direction toward the passage opening position is applied to the shaft portion extending in the vertical direction by a weight mechanism provided in the shaft portion. When the shaft portion extends in the horizontal direction, a horizontal ventilation damper is formed, and when the shaft portion extends in the vertical direction, a vertical ventilation damper is formed.

  When a rotational moment in the direction toward the passage opening position is applied to the shaft portion by its own weight, the fin body portion is made hollow, or a weight such as lead is fitted into the hollow hollow portion. By adjusting the weight of the shaft, the magnitude of the rotational moment applied to the shaft portion can be set to an optimum value for natural ventilation.

  The weight mechanism includes a vertical shaft member extending in the vertical direction and connected to the shaft portion, one bevel gear fixed to the vertical shaft member, and the other bevel gear engaged with the one bevel gear. And a bevel gear mechanism having a horizontal shaft member fixed to the other bevel gear and extending in the horizontal direction, and extending from the horizontal shaft member to one side in the radial direction and fixed to the horizontal shaft member. A threaded rod member and a weight screwed to the threaded rod member, and according to such a weight mechanism, the screwing position of the weight to the threaded rod member is determined. By adjusting, the magnitude of the rotational moment applied to the shaft portion can be set to an optimum value for natural ventilation.

  Further, such a weight mechanism is provided at one end outside the frame of the shaft portion extending in the horizontal direction, and the rotational moment in the direction toward the passage opening position in cooperation with the weight mechanism and the weight of the fin body portion. May be applied to the shaft portion, and moreover, in order to apply a rotational moment in the direction toward the passage opening position to the shaft portion, the elastic means instead of using the dead weight or the weight of the fin main body portion or together therewith. The fin main body may be constantly urged so as to be rotated toward the passage opening position by the elastic means.

  In the ventilation damper of the present invention, the fin main body portion generates a lift that becomes a rotational moment around the shaft portion in the direction toward the passage blockage position by the air flow inside the passage from the inlet hole toward the outlet hole. The fin body portion may be curved so as to be convex on one surface in the front end portion and the vicinity thereof, and in this case, the fin main body portion is curved so as to be concave on the other surface in the front end portion and the vicinity thereof. May be.

  The ventilation damper of the present invention may further include a rotating means for forcibly rotating the fin to the passage closed position. In this case, the rotating means includes a rotation generating means for causing rotation and the rotation generating means. It is preferable that transmission means for transmitting the generated rotation to the fin is provided, and the transmission means is configured to allow free rotation of the fin rotated to the passage opening position toward the passage closing position.

  In a preferred example, the rotation generating means includes a reversible electric motor and a reduction gear mechanism that decelerates the rotation of the output rotation shaft of the reversible electric motor. The reduction gear mechanism is an output rotation shaft of the reversible electric motor. An input shaft connected to the output rotation shaft of the reversible electric motor so as to be rotated by rotation of the input shaft, a worm gear rotated by rotation of the input shaft, and a worm gear rotated by rotation of the worm gear. And the output shaft for outputting the rotation of the worm wheel gear to the transmission means. According to the reduction gear mechanism including the worm wheel gear and the worm wheel gear, Unintentional rotation of the output shaft can be prevented, and fluctuations in the passage opening position and passage closing position of the fin body due to strong winds can be avoided. It can be operated normally.

  In the present invention, the rotation generating means also includes a prohibition mechanism that prohibits rotation of the shaft portion beyond a certain level, and an overcurrent generated in the reversible electric motor when prohibiting rotation of the shaft portion beyond a certain value by the prohibition mechanism. A power supply stop mechanism for stopping the supply of the electric power, and according to the rotation generating means provided with such a prohibition mechanism and a power supply stop mechanism, the fin can be freely rotated with the passage closed position. It can be accurately placed at the passage opening position.

  In a preferred example of the present invention, the transmission means includes a first rotatable member fixed to the output shaft, a second rotatable member connected to the shaft portion, and the first and second rotatable members. A connecting member fixed to one end of the connecting member, and an arc slit provided on the other of the first and second rotatable members and receiving the other end of the connecting member. The slit allows one of the first and second rotatable members to rotate relative to the other of the first and second rotatable members between the passage opening position and the passage closing position with respect to the rotation direction of the fin. In addition, the second rotatable member extends in a circular arc shape with respect to the rotation direction of the fin, and the second rotatable member has a first arc within the range of the arc slit so that the fin arranged at the passage opening position can freely rotate to the passage closing position. Self-rotating relative to the rotatable member On the other hand, the rotation of the first rotatable member generated by the rotation generating means causes the fins arranged at the passage opening position to rotate toward the passage closing position through the first coupling member. It is forcibly rotated by the rotatable member.

  According to the present invention, it is possible to flow a certain amount of air into the room using the air flow regardless of the change in the flow velocity of the air flow in the passage, and a large atmospheric pressure difference is generated inside and outside the room, resulting in a certain amount or more in the passage. When an air flow having a flow velocity of 5 centimeters is generated, the air flow can be used to naturally block the passage, thus preventing an unpleasant air flow from occurring in the room and preventing dust from entering the room. It is possible to provide a ventilation damper that can eliminate the carry-in, reduce air-conditioning power consumption, and cause no inadvertent stoppage of the fins.

FIG. 1 is a cross-sectional explanatory view taken along the line II of FIG. FIG. 2 is an explanatory front view of the example shown in FIG. FIG. 3 is a cross-sectional explanatory view taken along the line III-III shown in FIG. FIG. 4 is a perspective explanatory view of the rotating body of the example shown in FIG. FIG. 5 is a cross-sectional explanatory view taken along line VV shown in FIG. FIG. 6 is a perspective explanatory view of the transmission means of the example shown in FIG. FIG. 7 is an operation explanatory diagram of the example shown in FIG. FIG. 8 is a diagram for explaining the operation of the example shown in FIG. FIG. 9 is a cross-sectional explanatory view taken along line IX-IX shown in FIG. 10 of another example of the preferred embodiment of the present invention. FIG. 10 is an explanatory front view of the example shown in FIG. FIG. 11 is an operation explanatory diagram of the example shown in FIG.

  Next, the present invention and its embodiments will be described in more detail with reference to preferred examples shown in the drawings. The present invention is not limited to this example.

  1 to 6, the ventilation damper 1 of this example includes a frame 7 having a passage 6 having an inlet hole 3 opened to the outside 2 and an outlet hole 5 opened to the room 4 inside, and FIGS. 1 and 2. The fin 8 is disposed in the frame 7 so as to be rotatable in the direction R about the axis O1 so as to be able to rotate between the passage opening position shown in FIG. 7 and the passage closing position shown in FIGS. Rotating means 9 for forcibly rotating the position is provided.

  The frame 7 includes a pair of side wall plates 11 and 12 facing each other, a frame body 13 attached to the side wall plates 11 and 12 by bridging the side wall plates 11 and 12, and the passage 6 in the middle of the passage 6. A hollow airtight member (closing member) 14 made of an elastic member such as rubber and the side wall plates 11 and 12 are bridged and fitted to the frame main body 13 while being enclosed and fitted to the frame main body 13. And a hollow cushioning member 15 made of an elastic member such as rubber, and mounting plates 18 and 19 attached to the outer side surfaces 16 and 17 of the side wall plates 11 and 12, respectively. The passage 6 defined by the respective inner side surfaces 20 and 21 and the inner surface 22 of the frame body 13 has an inlet hole 3 that opens toward the outdoor side 2 in the horizontal direction H at one end in the horizontal direction H. And a passage portion 24 that has an outlet hole 5 that opens toward the interior 4 in the vertical direction V at one end, extends in the vertical direction V, and communicates with the other end of the passage portion 23 at the other end. It has.

The fin 8 is supported by the side wall plates 11 and 12 of the frame 7 at both ends 25 and 26 so as to be rotatable in the direction R about the axis O1 and at the passage portion 23 extending in the horizontal direction H. A fin main body 29 that extends from the shaft portion 27 to one side in the radial direction and is integrally provided over the entire shaft portion 27 and has two hollow portions 28; Extending to the other side opposite to the one side and provided integrally with the shaft portion 27 and having a hollow portion 30, the shaft portion 27 penetrates the shaft portion 27 and is fitted to the shaft portion 27. The shaft portion 27, the fin main body portion 29, and the protruding portion 31 are made of synthetic resin and are integrally formed. The shaft member 32 is one of the side plates that penetrate the side wall plate 11. The other end 3 that penetrates the side wall plate 12 to the side wall plate 11 at the end 33. Are supported by the side wall plates 12 through bush sliding bearings (not shown) so as to be rotatable in the direction R about the axis O1, and the shaft portion 27 is supported at both ends via the shaft member 32. The end portions 25 and 26 are supported by the side wall plates 11 and 12 so as to be rotatable in the direction R about the axis O1, and the end surfaces in the horizontal direction H of the both end portions 25 and 26 are the inner side surfaces 20 and 21, respectively. Are arranged with gaps 35 and 36.
Yes.

  The fin main body 29 has a lift that becomes a rotational moment around the axis O1 of the shaft portion 27 in the direction R1 toward the passage blockage position by the air flow A inside the passage 6 from the inlet hole 3 toward the outlet hole 5. As shown, the tip 41 and one surface 42 in the vicinity thereof are curved so as to be a smooth convex surface, while the other surface 43 is formed with irregularities, and thus the fin main body 29. Is configured to apply a rotational moment around the shaft portion 27 in the direction R1 in the direction R1 toward the passage blockage position to the shaft portion 27 by the air flow A passing through the passage 6 from the inlet hole 3 toward the outlet hole 5. .

  The fin main body 29 has a longer radial length compared to the radial length of the ridge 31 and a heavier weight than the weight of the ridge 31. As a result, the shaft portion 27 is given a rotational moment in the direction R <b> 2 toward the passage opening position due to the weight of the fin main body portion 29.

  As shown in FIGS. 1 and 2, the fin 8 contacts the buffer member 15 with the ridge portion 31 and is buffered when the fin 8 is rotated to the passage opening position by rotation in the direction R <b> 2 in the natural ventilation operation. The elastic deformation of the member 15 reduces the impact of rotation stop in the direction R2 at the passage opening position, and the air flow A passing through the passage 6 from the inlet hole 3 toward the outlet hole 5 is generated in the constant air volume natural ventilation operation. When there is not, the fin body 29 is maintained at the passage opening position by the rotational moment in the direction R2 toward the passage opening position given by the weight of the fin body 29, while the passages as shown in FIGS. When rotated to the closed position, the airtight member 14 is elastically deformed somewhat on the surface 42 of the fin main body 29 and contacts the airtight member 14 on the surface 42 so that the entire passage 6 is airtight on the fin main body 29. Like to block To have.

  The rotation unit 9 includes a rotation generation unit 51 that generates rotation in the direction R, and a transmission unit 52 that transmits the rotation generated by the rotation generation unit 51 to the fins 8.

  The rotation generating means 51 includes a base 55 fixed to the mounting plate 18, a reversible electric motor 56 provided on the base 55, and an output rotation shaft 57 of the reversible electric motor 56 provided on the base 55. The reduction gear mechanism 58 that decelerates the rotation of the shaft and the rotation of the shaft portion 27 more than a certain amount, that is, the further rotation of the fin main body portion 29 in the direction R1 beyond the passage closing position and the direction R2 beyond the passage opening position. The prohibiting mechanism 59 for prohibiting further rotation of the fin main body 29, and the overcurrent generated in the reversible electric motor 56 when the prohibiting mechanism 59 prohibits the rotation of the shaft portion 27 beyond a certain level, And a power supply stop mechanism 60 for stopping the supply.

  The reduction gear mechanism 58 meshes with the housing housing 64 and the input shaft 65 connected to the output rotation shaft 57 of the reversible electric motor 56 so as to be rotated by the rotation of the output rotation shaft 57 of the reversible electric motor 56. A worm gear 66 that is rotated by rotation of the input shaft 65 via a plurality of gears, a worm wheel gear 67 that meshes with the worm gear 66 to be rotated by rotation of the worm gear 66, and a worm wheel gear 67. An output shaft 68 for outputting the rotation to the transmission means 52 is provided, and a plurality of gears meshed with each other, a worm gear 66 and a worm wheel gear 67 are housed in the housing housing 64. The plurality of gears meshed with each other, the worm gear 66, the worm wheel gear 67, and the output shaft 68 are rotatably supported by the housing case 64.

  The rotating shaft 72 of the worm gear 66 rotatably supported by the housing case 64 includes an end portion 73 protruding outward from the housing housing 64, and the rotating shaft 72 is manually rotated by the end portion 73. The worm gear 66 can be rotated via the wheel.

  The prohibiting mechanism 59 includes a rotating body 75 fixed to the output shaft 68 rotatably supported by the housing housing 64 outside the housing housing 64, and a rotation blocking member secured to the side wall surface 76 of the housing housing 64. 77, and the rotating body 75 protrudes in the axial direction from one end surface 79 in the axial direction of the main body portion 78 and is fixed to the output shaft 68, and on the end surface 79. The rotation preventing member 77 is formed in a circular arc notch 87 between one end surface 85 and the other end surface 86 of the semicylindrical portion 80 in the direction R. It is arranged.

  The prohibiting mechanism 59 is the collision of the end surface 85 with the one side surface 91 in the direction R of the rotation preventing member 77 in the rotation in the direction R1 of the rotation shaft 75 and the output shaft 68 to which the rotation body 75 is fixed. Further rotation in the direction R1 of the shaft 68, and the collision of the end face 86 with the other side 92 of the rotation blocking member 77 in the direction R of the rotation body 75, and thus the rotation of the output shaft 68 in the direction R2, 75, and therefore, further rotation of the output shaft 68 in the direction R2 is prohibited.

  The power supply stopping mechanism 60 is supplied with electric power, that is, by rotating the output rotation shaft 57 of the energized reversible electric motor 56, the input shaft 65, a plurality of meshed gears, a worm gear 66, a worm wheel gear 67, and After the rotating body 75 is rotated via the output shaft 68, the output rotating shaft 57 can rotate based on the rotation inhibition of the rotating body 75 due to the collision of the end surface 85 with the side surface 91 or the collision of the end surface 86 with the side surface 92. When the power is lost, an overcurrent generated in the reversible electric motor 56 is detected and the supply of power to the reversible electric motor 56 is stopped, that is, energization is stopped.

  The transmission means 52 is a disc-shaped rotatable member 101 fixed to the output shaft 68, is fixed to the end portion 33 of the shaft member 32, is connected to the shaft portion 27 via the shaft member 32, and is rotatable. A disc-shaped rotatable member 102 concentric with the member 101 and facing the rotatable member 101, and a pair of pin members 104 and 105 as connecting members fixed to the rotatable member 102 at one end 103. And a pair of arc slits 107 and 108 which are provided on the rotatable member 101 and receive the other end 106 of each of the pin members 104 and 105.

  In the arc slits 107 and 108 arranged symmetrically with respect to the axis O1, the arc slit 107 is defined by the arc surfaces 111 and 112 of the rotatable member 101 in the direction R, and the arc slit 108 is rotatable in the direction R. The arcuate surfaces 113 and 1114 of the member 101 stipulate the rotation state of the rotatable member 101 in which the side surface 92 of the rotation preventing member 77 and the end surface 86 of the semi-cylindrical portion 80 are in contact by the arc slits 107 and 108. The rotation of the rotatable member 102 in the same direction R1 based on the rotation of the direction R1 due to the increase in the air flow A of the fin 8 rotated to a position other than the passage opening position or the passage closing position causes the rotation member 102 to rotate. The other end 106 of each of the implanted pin members 104 and 105 collides with the arc surface 112 and the arc surface 114. Then, in addition to the rotatable member 102, further rotation of the fin 8 in the same direction R1 is prohibited, while the air flow A of the fin 8 being rotated to a position other than the passage closing position or the passage opening position is reduced. Alternatively, when the other end 106 of each of the pin members 104 and 105 collides with the arc surface 111 and the arc surface 113 due to the rotation of the rotatable member 102 in the same direction R2 based on the rotation of the direction R2 due to disappearance, in addition to the rotatable member 102 Further rotation of the fin 8 in the same direction R2 is prohibited, and the reversible electric motor 56 is energized from the rotating state of the rotating body 75 in which the side surface 92 and the end surface 86 are in contact with each other. The rotation of the rotatable member 101 via the output shaft 68 in the direction R1 causes the other end 106 of each of the pin members 104 and 105 to move toward the arc surface 111 and the arc surface 113 in the direction R1. Then, the rotatable member 102 is forcibly rotated in the direction R1 until the end surface 85 collides with the side surface 91, and the rotation of the rotatable member 102 in the direction R1 causes the fin 8 to move in the same direction R1 via the shaft member 32. And is forced into the passage closed position.

  Thus, the arc slits 107 and 108 rotate the fin 8 so that the rotatable member 102 can rotate relative to the rotatable member 101 between the passage open position and the passage closed position with respect to the direction R which is the rotation direction of the fin 8. The rotatable member 102 is rotatable within the range of the arc slits 107 and 108 so that the fin 8 arranged at the passage opening position can freely rotate to the passage closing position. While being rotatable in the direction R with respect to the member 101, the rotation of the direction R1 generated by the rotation generating means 51 rotates the fins arranged at the passage opening position toward the passage closing position. The pin members 104 and 105 are forcibly rotated, so that the transmission means 52 passes through the fins 8 rotated to the passage opening position. It is adapted to permit the free rotation toward the closed position.

  In the ventilation damper 1 described above, as shown in FIG. 1 and FIG. 2, the reversible electric motor 56 is not energized from the power supply stop mechanism 60, the air flow A in the passage 6 disappears, and the fin 8 moves in the direction R <b> 2. The output shaft 68 is prevented from rotating in the direction R due to the engagement of the worm wheel gear 67 with the worm gear 66 when being rotated freely to the passage opening position. The portion 31 is on the buffer member 15, the end face 86 of the rotating body 75 is on the side face 92 of the rotation preventing member 77, one end 106 of the pin member 104 is on the arc surface 111, and one end 106 of the pin member 105 is on the arc. When the air flow A in the passage 6 increases or decreases in this state, the rotational moment around the shaft portion 27 in the direction R1 based on the lift generated in the fin body portion 29 and the fin body Part 29 The fin 8 is rotated in the direction R1 or R2 around the axis O1 within the range of the arc slits 107 and 108 in the direction R by the magnitude of the rotational moment around the shaft portion 27 in the direction R2 based on its own weight. For example, in the air flow A of 3 m / sec or more, the fin 8 is connected to the airtight member 14 on the surface 42 of the fin main body 29 as shown in FIGS. In contact with each other, the entire passage 6 is airtightly closed by the fin main body 29, and thus a constant air volume natural ventilation operation is performed.

  Further, in the ventilation damper 1, in a state where the end face 86 of the rotating body 75 is in contact with the side face 92 of the rotation preventing member 77, the switch for forcibly closing the passage 6 is manually turned on or by a command signal from the control device. When the reversible electric motor 56 is energized from the power supply stop mechanism 60, the rotation of the output rotation shaft 57 of the reversible electric motor 56 causes the input shaft 65, a plurality of meshed gears, a worm gear 66, and a worm wheel. The rotating member 75 and the rotatable member 101 are rotated in the direction R1 around the axis O1 via the gear 67 and the output shaft 68, and the pin member that contacts the arcuate surfaces 111 and 113 by this rotation of the rotatable member 101, respectively. Via 104 and 105, the rotatable member 102 is rotated in the direction R1 around the axis O1, and in the direction R1 around the axis O1 of the rotatable member 102. The fin 8 is rotated in the same direction R <b> 1 toward the passage closing position via the shaft member 32, while the rotation in the direction R <b> 1 around the axis O <b> 1 of the rotating body 75 causes the end surface 86 to contact the side surface 92. When the end surface 85 of the rotating body 75 approaches the side surface 91 of the rotation preventing member 77 and the end surface 85 of the rotating body 75 collides with the side surface 91 of the rotation preventing member 77 after being released, the power supply stop mechanism 60 is reversible. The overcurrent of the motor 56 is detected, and the energization to the reversible electric motor 56 is stopped, whereby the fin 8 has the output shaft 68 that cannot rotate in the direction R due to the engagement of the worm wheel gear 67 with the worm gear 66. The airtight member 14 is elastically deformed to some extent by the surface 42 of the fin main body 29 and is brought into contact with the airtight member 14 by the surface 42 so that the entire passage 6 is held in the passage closed position where the fin main body 29 is airtightly closed. That.

  Furthermore, in the ventilation damper 1, in a state where the end surface 85 of the rotating body 75 is in contact with the side surface 91 of the rotation preventing member 77, the switch for manually opening the passage 6 is turned on manually or by a command signal from the control device. When the reversible electric motor 56 is energized from the power supply stop mechanism 60, the reverse rotation of the output rotation shaft 57 of the reversible electric motor 56 causes the input shaft 65, a plurality of gears meshed with each other, the worm gear 66, The rotating body 75 and the rotatable member 101 are rotated around the axis O1 in the direction R2 via the wheel gear 67 and the output shaft 68, and the arc slits 107 and 108 are also rotated around the axis O1 by this rotation of the rotatable member 101. , The rotatable member 102 having pin members 104 and 105 whose one end 106 is disposed in the arc slits 107 and 108 has an axis O1. As a result of being able to rotate around in the direction R2, the fin 8 is rotated in the direction R2 around the axis O1 toward the passage opening position by the weight of the fin main body 29, while the axis O1 of the rotating body 75 The rotation of the rotation direction R2 releases the contact of the end surface 85 with the side surface 91, the end surface 86 of the rotating body 75 approaches the side surface 92 of the rotation preventing member 77, and the end surface 86 of the rotating body 75 is prevented from rotating. When it collides with the side surface 92 of the member 77, the power supply stop mechanism 60 detects an overcurrent of the reversible electric motor 56 and stops energizing the reversible electric motor 56, whereby the worm gear 66 of the worm wheel gear 67 is stopped. With the output shaft 68 that cannot rotate in the direction R due to meshing with the fin 8, the fin 8 is brought to the passage opening position where the protrusion 31 is brought into contact with the buffer member 15.

  In addition, in the ventilation damper 1, since the worm gear 66 can be rotated via the rotating shaft 72 by manual rotation of the end portion 73, the reversible electric motor 56 is normally operated in the event of a power failure or the like. The fins 8 can be manually arranged at the passage opening position and the passage closing position when it is not possible.

  The arc slits 107 and 108 are such that the airtight member 14 is elastically deformed somewhat by the surface 42 of the fin main body portion 29 while the buffer member 15 is elastically deformed somewhat by the protrusion 31 in the constant air volume natural ventilation operation. It is preferable that the fin 8 extends in the direction R so that the fin 8 can rotate in the directions R1 and R2.

  In the ventilation damper 1, when the fin 8 is rotated to the passage closing position, the entire passage 6 is closed by the fin main body portion 29, so that the shaft portion 27 is substantially separated from the passage 6. As a result of the arrangement, the side closing member that secures the sealing at the end surfaces of both end portions 25 and 26 of the shaft portion 27 can be omitted, and thus the side portion closing member can be connected to both end portions 25 and 26 of the shaft portion 27. Interference (sliding resistance) can be avoided, an inadequate rotation stop of the fin 8 can be prevented, and the fin disposed rotatably in the direction R in the frame 7 so as to be able to rotate between the passage open position and the passage closure position. The fin body 29 of FIG. 8 applies a rotational moment around the shaft 27 in the direction R <b> 1 toward the passage closing position to the shaft 27 by the air flow A passing through the passage 6. Due to the weight of the fin body 29 Since a rotational moment around the shaft portion 27 in the direction R2 toward the road opening position is given, for example, the number and size of the hollow portions 28 are changed, or a weight such as lead is placed in the hollow portion 28. By appropriately setting the magnitude of the rotational moment around the shaft portion 27 in the direction R2 that is fitted into the passage opening position, a large atmospheric pressure difference is generated between the inlet hole 3 and the outlet hole 5, and the passage 6 has a certain level or more. When the air flow A having a flow velocity of, for example, an air flow A of 3 m / sec or more is generated, the fin main body 29 can be naturally rotated to the passage closing position by using the air flow A. Unnecessary air flow A can be prevented from being caused to flow into and out of the room 4 from the outlet hole 5 through the passage 6 due to strong winds and the like. Bring it into the room 4 through The resulting lost, moreover, without air-conditioned state in the room 4 is greatly disturbed, it may work to reduce the air-conditioning power consumption.

  Further, in the ventilation damper 1, since the reduction gear mechanism 58 includes the worm gear 66 and the worm wheel gear 67, unintentional rotation of the output shaft 68 can be prevented when the reversible electric motor 56 is inoperative, and strong wind The variation of the passage opening position and the passage closing position of the fin main body 29 due to the above can be avoided, and the fin main body portion 29 can always operate normally.

  In addition, in the ventilation damper 1, since the rotation generating means 51 includes the prohibiting mechanism 59 and the power supply stopping mechanism 60, the fins 8 are accurately arranged at the passage closing position and the freely opening passage opening position. it can.

  By the way, the ventilation damper 1 is a horizontal type in which the shaft portion 27 extends in the horizontal direction H. Instead of this, the shaft portion 27 extends in the vertical direction V as shown in FIGS. 9 and 10. In this case, the shaft portion 27 is given a rotational moment in the direction R2 toward the passage opening position by the weight mechanism 121 provided on the shaft portion 27. Yes.

  The weight mechanism 121 extends in the vertical direction V and is connected to the end portion 26 of the shaft portion 27 outside the frame 7 via the end portion 34 of the shaft member 32, and the vertical direction shaft member 122. The bevel gear 123 fixed to the bevel gear 124, the bevel gear 124 meshed with the bevel gear 123, the horizontal shaft member 125 fixed to the bevel gear 124 and extending in the horizontal direction H, and the bevel gear 123 and the bevel gear 124 are accommodated. At the same time, the vertical shaft member 122 is rotatably supported in the direction R around the axis O1 extending in the vertical direction, while the horizontal shaft member 125 is rotated in the direction R3 around the axis O2 extending in the horizontal direction H. A bevel gear mechanism 127 provided with a housing 126 that is freely supported, and a rod member 128 with a screw that extends from the horizontal shaft member 125 to one side in the radial direction and is fixed to the horizontal shaft member 125. , A weight 129 made of a nut or the like screwed to the threaded rod member 128 so as to be adjustable in position, and a base 130 to which the bevel gear mechanism 127 is attached and to the outer surface 17 of the side wall plate 12. It has.

  A shaft portion 27 extending in the vertical direction V, an inlet hole 3 opening toward the outdoor 2 in one horizontal direction H at one end, and a passage portion 23 extending in the one horizontal direction H and one horizontal direction An outlet hole 5 that opens toward the room 4 in one other horizontal direction H orthogonal to H extends at one end and extends in the other horizontal direction H and communicates with the other end of the passage portion 23 at the other end. In the ventilation damper 120 including the passage 6 including the passage portion 24 and the weight mechanism 121 and the other components configured similarly to the ventilation damper 1, the weight 129 of the weight 129 is replaced with the weight of the fin main body 29. The weight is transmitted to the shaft portion 27 via the screw rod member 128 and the bevel gear mechanism 127, and the weight of the weight 129 causes the fin body portion 29 to move around the shaft portion 27 in the direction R2 toward the passage opening position. Rotational moment at When the fin main body 29 is arranged at the passage closing position by the flow A, the screw rod member 128 extends in the substantially horizontal direction H as shown in FIG. The maximum rotational moment around the shaft portion 27 in the direction R2 toward the open position is applied.

  The vertical ventilation damper 120 that can be disposed between the vertical frame of the window frame and the vertical frame of the shoji in the window operates in the same manner as the horizontal ventilation damper 1 and can obtain the same effect.

DESCRIPTION OF SYMBOLS 1 Ventilation damper 2 Outdoor 3 Inlet hole 4 Indoor 5 Outlet hole 6 Passage 7 Frame 8 Fin 9 Rotating means 27 Shaft part 29 Fin main-body part

Claims (9)

  A frame having a passage having an inlet hole and an outlet hole; and a fin rotatably supported by the frame so as to be rotatable between a passage opening position and a passage closing position. And a fin body portion extending in one radial direction from the shaft portion and provided on the shaft portion and disposed in the frame. Is configured to impart a rotational moment around the shaft portion in the direction toward the passage blockage position to the shaft portion by the air flow passing through the passage. A rotating moment around the shaft in the direction toward the passage opening position is given by the weight provided in the section, and when the fin is rotated to the passage closing position, the entire passage is closed by the fin main body portion. Like And have ventilation dampers.   The ventilation damper according to claim 1, wherein the shaft portion extends in a horizontal direction, and a rotational moment in a direction toward the passage opening position is given to the shaft portion due to the weight of the fin main body portion.   The ventilation damper according to claim 1, wherein the shaft portion extends in a vertical direction, and a rotational moment in a direction toward the passage opening position is given to the shaft portion by a weight mechanism provided in the shaft portion.   The weight mechanism includes a vertical shaft member that extends in the vertical direction and is connected to the shaft portion outside the frame, one bevel gear fixed to the vertical direction shaft member, and the other meshed with the one bevel gear. Bevel gear mechanism and a bevel gear mechanism fixed to the other bevel gear and having a horizontal shaft member extending in the horizontal direction, and the horizontal shaft member extending from the horizontal shaft member to one side in the radial direction The ventilation damper according to claim 3, further comprising: a rod member with a screw fixed to the rod, and a weight screwed onto the rod member with the screw.   The fin main body portion has a tip at the tip portion and its vicinity so as to generate a lift that becomes a rotational moment around the shaft portion in the direction toward the passage closing position due to the air flow inside the passage from the inlet hole to the outlet hole. The ventilation damper according to any one of claims 1 to 4, wherein the ventilation damper is curved so as to be convex on one surface.   Rotating means for forcibly rotating the fin to the passage closed position is further provided. The rotating means is rotation generating means for causing rotation, and transmission means for transmitting the rotation generated by the rotation generating means to the fin. The ventilation damper according to any one of claims 1 to 5, wherein the transmission means allows free rotation of the fin rotated to the passage opening position toward the passage closing position.   The rotation generating means includes a reversible electric motor and a reduction gear mechanism that decelerates the rotation of the output rotation shaft of the reversible electric motor. The reduction gear mechanism rotates by rotation of the output rotation shaft of the reversible electric motor. An input shaft connected to the output rotation shaft of the reversible electric motor, a worm gear rotated by rotation of the input shaft, and a worm gear meshing with the worm gear rotated by rotation of the worm gear The ventilation damper according to claim 6, comprising a wheel gear and an output shaft that outputs rotation of the worm wheel gear to the transmission means.   The rotation generating means is a prohibition mechanism that prohibits rotation of the shaft portion beyond a certain level, and supplies electric power to the reversible electric motor with an overcurrent generated in the reversible electric motor when prohibiting rotation of the shaft portion beyond a certain level by the prohibition mechanism. The ventilation damper according to claim 7, comprising a power supply stop mechanism for stopping.   The transmission means is fixed at one end to one of the first rotatable member fixed to the output shaft, the second rotatable member connected to the shaft portion, and the first and second rotatable members. And a circular slit that is provided on the other of the first and second rotatable members and that receives the other end of the connecting member. With respect to the direction of rotation of the fins, such that one of the first and second rotatable members can rotate relative to the other of the first and second rotatable members between the passage open position and the passage closed position. Extending in an arc shape, the second rotatable member rotates with respect to the first rotatable member within the arc slit so that the fin arranged at the passage opening position can freely rotate to the passage closing position. Rotation while being free Forced rotation by the first rotatable member via the connecting member so that the rotation of the first rotatable member generated by the raising means causes the fin arranged at the passage opening position to rotate toward the passage closing position. The ventilation damper according to any one of claims 6 to 8, wherein the ventilation damper is configured.

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