JP2002277037A - Ventilation damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation damper that can completely close a passage, can effect swinging motion of a blade lightly, is free from causing noises or the like, and realizes energy saving in the swinging motion of the blade. SOLUTION: The ventilation damper 1 comprises a frame 5 having a passage 4 with an inlet opening 2 and an outlet opening 3 formed in the interior thereof, a blade means 8 freely swingably installed in the frame 5 in such a manner as to open and close the passage 4 by swinging motion in A and B directions and provided with a blade main body 6 and side end sections 7 on both ends of the blade main body 6 in an axial direction X, and a seal member 11 having a sealing curved face 9 to be brought into contact with a sealing curved face 14 on both end sections 7 of the blade means 8 and fixed to the side wall 10 of the frame 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the ventilation between indoor and outdoor areas of business buildings, office buildings, apartment houses, detached houses, warehouses, etc. It relates to a controlled ventilation damper.

[0002]

Normally, in this type of ventilation damper, the blades are rotatably arranged in a frame that defines the passage, and the opening of the passage is determined by the rotation of the blades, so that the passage is formed. The degree of ventilation through is controlled.

In the ventilation damper, it is preferable that the passage is closed completely by the blades so as not to cause air leakage. However, the side wall of the frame that defines the passage and the axial end surface of the blade are preferably used. Usually, a small gap is provided between the blades to secure the rotation of the blade. As a result, it may be difficult to completely close the passage by the blade due to the gap.

If the gap between the side wall and the side end face of the blade is made zero in order to completely close the passage, thermal expansion of the blade or the frame or slight deformation or displacement thereof causes the side wall and the side of the blade to be closed. When the end faces come in close contact with each other more than necessary, the rotation of the blades cannot be performed lightly. Etc. may occur, and more energy is required for rotating the blades.

Further, in such a ventilation damper, the passage is opened and closed by rotating the blade in response to the strength of the wind and utilizing the force of the wind so as to prevent the strong wind blowing outdoors from blowing into the room. Although it is preferable, if the side wall portion and the side end surface of the blade are in close contact, it is difficult to rotate the blade even in strong wind, while providing a gap there,
Although the responsiveness of the rotation of the blade to the wind improves,
There is a possibility that a strong wind may flow from the gap. In particular, when installing this type of ventilation damper in a high-rise building or the like, even a small gap may cause abnormal noise in addition to blowing strong wind.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and an object thereof is to completely block a passage and to lightly rotate a blade. It is an object of the present invention to provide a ventilation damper that can eliminate the risk of noise and the like and can save energy during blade rotation.

[0007]

According to a first aspect of the present invention, there is provided a ventilation damper comprising: a frame having a passage having an inlet hole and an outlet hole formed therein; A vane means which is freely disposed and has a seal curved surface at an axial end, an elastic seal member which has a seal curved surface with which the seal curved surface of the vane abuts and is fixed to a side wall of the frame; Here, the seal curved surface of the blade means is formed so that the distance from the rotation axis of the blade means gradually becomes longer in the opening rotation direction of the blade means, and the seal curved surface of the seal member is , And have a shape complementary to the curved curved surface of the blade means.

In the ventilation damper of the first aspect, the seal curved surface formed at the side end of the blade means is formed so that the distance from the rotation axis of the blade means gradually becomes longer in the opening rotation direction of the blade means. Since the seal curved surface of the seal member has a shape complementary to the seal curved surface formed at the side end, when the blade means rotates in the closing direction of the passage, it is formed at the side end of the blade means. As a result, the seal curved surface gradually approaches the seal curved surface of the seal member and finally comes into contact with the seal curved surface. As a result, the passage can be completely closed at the side end of the blade means, In this way, the rotation of the blade means can be made extremely light, noise and the like can be reduced as much as possible, and energy can be saved in the rotation of the blade means.

In the ventilation damper according to the second aspect of the present invention, in the ventilation damper according to the first aspect, the distance between each part of the seal curved surface of the blade means from the rotation axis of the blade means is determined by a corresponding position of the seal member. Is longer than the distance of the seal curved surface from the rotation axis of the blade means.

According to the ventilation damper of the second aspect, at the end of the rotation of the passage of the blade means in the closing direction, the seal curved surface formed on the side end of the blade means can be pressed against the seal curved surface of the seal member. Because of this, the pressing can more completely block the passage at the side end of the blade means.

[0011] In the ventilation damper according to the third aspect of the present invention, in the ventilation damper according to the first or second aspect, the sealing curved surface of the blade means may rotate the blade means from the closed rotation position to the partially opened rotation position with respect to the passage. In the region, the blade member abuts on the seal curved surface of the seal member, and in the rotation region of the blade means from the partial open rotation position to the full open rotation position with respect to the passage, there is no contact from the seal curved surface of the seal member.

According to the ventilation damper of the third aspect, the seal curved surface of the blade means and the seal curved surface of the seal member are not in contact with each other in the rotation region of the blade means from the partially opened rotation position to the fully opened rotation position. In addition to saving energy, for example, when the blade means is freely rotatable in a direction toward the passage closing position when the blade means is brought to the fully open rotation position, this rotation region In the rotation region of the blade means from the closed rotation position to the partially opened rotation position, and in order to make the seal curved surface of the blade means and the seal curved surface of the seal member contact each other, the passage blockage is completely completed. Can be done.

[0013] In the ventilation damper according to a fourth aspect of the present invention, in the ventilation damper according to any one of the first to third aspects, the sealing curved surface of the blade means may be a blade from a closed rotation position to a partially opened rotation position with respect to the passage. In the rotation region of the means, the seal member is elastically deformed.

According to the ventilation damper of the fourth aspect, since the seal member is elastically deformed from the closed rotation position to the partially opened rotation position, the passage can be more completely closed.

In the ventilation damper according to a fifth aspect of the present invention, in the ventilation damper according to any one of the first to fourth aspects, the blade means includes a shaft portion and a pair of blade portions extending radially from the shaft portion. And a side end provided at an axial end of the blade main body, wherein the side end has a central portion disposed at an axial end of the shaft, A pair of blade-side ends, which are arranged at the axial ends of the blades and extend radially integrally from the central portion, and an enlarged portion integrally formed at the central portion and one of the blade-side ends. And a side end auxiliary portion disposed at the axial end of the central portion.The seal curved surface of the blade means is provided on the outer edge of the enlarged portion and the side end auxiliary portion. Has a notch extending at its blade-side end.

According to the fifth aspect of the ventilation damper, since the seal curved surface of the blade means is also provided on the outer edge of the side end auxiliary portion, even at the notch portion where one blade side end extends. Since the seal curved surface of the blade means and the seal curved surface of the seal member can be brought into contact with each other, a gap around one of the blade-side ends can be eliminated in closing the passage, and more complete passage closing can be achieved.

In the ventilation damper according to a sixth aspect of the present invention, in the ventilation damper according to any one of the first to fifth aspects, the blade means is constantly urged to rotate toward the passage opening position. In addition, the airflow passing through the passage generates a rotational moment toward the passage closed position.

According to the ventilation damper of the sixth aspect, the blade means generates a rotational moment toward the passage closing position by the airflow passing through the passage.
For example, when the blade means is brought to the passage opening position and the blade means is freely rotatable in a direction toward the passage closing position, a constant air volume control based on the passage wind speed can be performed,
Therefore, when a large air pressure difference is generated between the indoor and the outside, and an air flow having a flow rate higher than a certain level, for example, an air flow of 3 m / sec or more is generated in the passage, the passage can be naturally blocked by using the air flow. In addition, it is possible to prevent the air from being unnecessarily introduced into the room through the passage due to strong wind or the like, thereby preventing an unpleasant air flow from being generated in the room, and also preventing the outside dust from being brought into the room. In addition, it is possible to eliminate the inconvenience that the air in the room is ventilated more than necessary and the air-conditioning effect is reduced, and it is possible to prevent an increase in air-conditioning power for compensating for this.

A ventilation damper according to a seventh aspect of the present invention is the ventilation damper according to any one of the first to sixth aspects, further comprising rotating means for forcibly rotating the blade means. The rotating means includes a rotating power generating means, and a transmitting means for transmitting the rotating power generated by the rotating power generating means to the blade means. When rotated, the blade means is allowed to freely rotate toward the passage closed position.

According to the ventilation damper of the seventh aspect, the blade means can be forcibly rotated by the rotation means, and when the blade means is rotated to the passage open position, the blade moves toward the passage closed position. Since the means is allowed to freely rotate, the passage can be forcibly opened and closed, and a constant air volume control based on the passage wind speed can be performed.

In the ventilation damper according to the seventh aspect, the transmission means allows the blade means to freely rotate toward the passage closed position when the blade means is rotated to the passage open position. Alternatively, however, the blade means may be rotated only by the rotating power generated by the rotating power generating means, so that the blade means cannot rotate freely.

The ventilation damper according to an eighth aspect of the present invention is the ventilation damper according to any one of the first to seventh aspects, wherein the blade means is biased so that the blade means is rotated toward the passage opening position. Further, there is provided an urging means.

According to the ventilation damper of the eighth aspect, since the urging means applies the rotational bias of the blade means toward the passage opening position, for example, when the blade means is brought to the passage opening position, Is freely rotatable in the direction toward the passage closing position, by appropriately setting the urging force of the urging means, it is possible to surely perform natural passage closing using the air flow, that is, constant air volume control. Can be.

Here, the biasing means may be constituted by a weight attached to an appropriate portion of the blade means so that the center of gravity of the blade means is displaced from the rotation axis, or alternatively or alternatively. At the same time, the configuration of the blade means may be changed, or further, a configuration of a coil spring may be used.
It may be constituted by a weight provided on the transmission means.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 8, a ventilation damper 1 of the present embodiment includes a frame 5 having a passage 4 having an entrance hole 2 and an exit hole 3 formed therein, and a passage 4 formed by rotation in directions A and B.
The blade body 6 and the blade body 6 have side ends 7 (only one is shown) at both ends in the axial direction X of the blade body 6 so as to open and close. The blade means 8, an elastic sealing member 11 having a seal curved surface 9 with which the seal curved surface 14 of the side end 7 of the blade means 8 abuts and being fixed to the side wall 10 of the frame 5, A rotating means 12 for forcibly rotating the blade means 8 to open and close the passage 4; and a rotating means 12 for rotating the blade means 8 toward the passage opening position, that is, in the direction A. And a biasing means 13 for biasing the blade means 8.

The frame 5 has the above-mentioned side wall portion 10 and the front wall portion 21 and the rear wall portion 22 integrally.
1 and the rear wall 22 are fitted with elastic sealing members 23 and 24 extending in the axial direction X, respectively.
Is provided with a dustproof net 25, and such a net is
The entrance hole 2 may be provided also as bird protection. The entrance hole 2
The outlet holes 3 are open to the indoor part 27 in the outdoor part 26, respectively.

A seal member similar to the seal member 11 is fixed to the other side wall of the frame 5 facing the side wall 10 in the axial direction X.

The blade means 8 includes a blade main body 6 and a side end 7.
In addition, a shaft member 31 fixed to the blade main body 6 and the side end 7 is provided. The shaft member 31 is rotatably supported in the A and B directions on the side wall 10 via a slide bearing or the like. Have been. The blade means 8 also has a side end and a shaft member similar to the side end 7 and the shaft member 31 on the other side wall of the frame 5, and this shaft member has an A side wall on the other side wall. And in the direction B. The relationship between the blade means 8 on the other side wall portion and the seal member fixed to the other side wall portion is the same as that on the side wall portion 10 side, and thus the description is omitted below.

The integrally formed blade main body 6 has a hollow cylindrical shaft portion 35 through which the rotation axis X passes, and a pair of hollow blade portions 36 and 37 extending integrally from the shaft portion 35 in the radial direction. The tip portions 38 and 39 in the radial direction of the blade portions 36 and 37 are provided with a passage 4 extending from the inlet hole 2 to the outlet hole 3.
The rotational moment toward the passage closed position by the airflow 40 passing through the blade means 8
It is curved so as to cause it.

Each of the tip portions 38 and 39 is provided with the blade means 8.
When the is rotated in the direction B, it comes into contact with each of the seal members 23 and 24 to elastically deform the seal members 23 and 24.

One surface 41 of the tip portion 38 and the blade portion 36 in the vicinity thereof is curved so as to be convex, and the other surface 42 is curved so as to be a concave surface complementary to the surface 41. Similarly, one surface 43 of the tip portion 39 and the blade portion 37 in the vicinity thereof is curved so as to be convex, and the other surface 44 is a concave surface complementary to the surface 43. So that it is curved. The curved shapes of the tip portions 38 and 39 and the blade portions 36 and 37 in the vicinity thereof are such that when the air flow 40 is generated in the passage 4 in the open state of the passage 4 by the blade means 8 (the position shown in FIG. 1). The wing portion 36 has a front wall portion 2
A lift force toward the rear wall portion 22 is generated on the blade portion 37 by the lift force toward 1, and the blade means 8 is rotated by a rotational moment based on the lift force so as to move toward the passage closing position.

The side end 7 has a side end member 52 fixed to the end face in the axial direction X of the blade main body 6 by a screw 51 or the like, and a semicircular shape similarly fixed to the side end member 52 by a screw 51 or the like. And a side end auxiliary member 53. The side end 7
May be integrally formed instead of the separate side end member 52 and side end auxiliary member 53, and the shaft member 31 and the side end auxiliary member 53 may be integrally formed. (Integral molding), and furthermore, the shaft member 31, the side end member 52 and the side end auxiliary member 53 may be integrally formed. They may be formed integrally.

The side end member 52 has a central portion 55 corresponding to the shaft portion 35, one blade side end portion 56 corresponding to the blade portion 36 and extending integrally from the central portion 55 in the radial direction, and a blade portion 36. The other blade-side end portion 57 corresponding to the portion 37 and extending from the center portion 55 integrally in the radial direction opposite to the blade-side end portion 56, and integrated with the center portion 55 and the blade-side end portion 56. And a sealing member 11 of the central portion 55, the blade-side end portion 56, and the expanding portion 58.
Curved surface 6 abutting on the curved surface 9 at the outer edge facing
1 and the sealing member 1 of the other blade side end 57.
The other sealing curved surface 6 of the sealing member 11 is provided on the outer edge facing
2 has a seal curved surface 63 that abuts on the seal curved surface 61 in the opening rotation direction A of the blade means 8, that is,
From one root position 64 of the blade-side end portion 57 to the central portion 55, an intersection position 65 between the blade-side end portion 56 and the enlarged portion 58
Is formed so that the distance D from the rotation axis X gradually becomes longer, and from the intersection position 65 to the tip position 66 of the blade-side end portion 56 is flush with the surface 41 of the blade portion 36. Is formed. The seal curved surface 63 is formed so as to be flush with the surface of the blade portion 37 including the surface 43.

The side end auxiliary member 53 as a side end auxiliary part is
An outer edge facing the seal member 11 has a seal curved surface 71 abutting on the seal curved surface 9, and the seal curved surface 71 is in the opening rotation direction A of the blade means 8, that is, one of the blades 37 with respect to the shaft 35. Position 72 corresponding to the base
From a position (corresponding to the other root position 73 of the blade-side end portion 57 with respect to the central portion 55) to a position at which the notch 74 described later at least exceeds the length in the rotational direction, in this example, a position 75 which is sufficiently exceeded, is gradually increased. Is formed so that the distance D from the rotation axis X becomes longer and is flush with the seal curved surface 61. From the position 75 to the end position 76, the distance D from the rotation axis X at the position 75 is determined. It is formed in an arc shape with a radius of curvature.

As described above, in this example, the seal curved surface 14 is
It is configured to include a seal curved surface 61 and a seal curved surface 71.

The integrally formed seal member 11 has a pair of seal pieces 81 and 82 and has a seal curved surface 9.
The seal piece 81 having the flat end face 77 of the side end auxiliary member 53 in addition to the notch 74 in which the blade side end 57 extends.
Has a protruding portion 83 having an end surface 78 with which the seal piece abuts, and a groove 84.
At one end, the projection 83 and the notch 7
4, a seal curved surface portion 86 terminated at the other end by a groove 84, and a seal curved surface terminated at one end by a notch 74 and extending along the groove 84 adjacent to the groove 84. The seal curved surface portion 86 includes a seal curved surface 71 from a position 72 to a position 75.
The seal curved surface portion 87 has a shape complementary to the seal curved surface 61, and abuts against the seal curved surface 61. It comes into contact.

In the case where no elastic deformation occurs in the seal member 11 in a state where the blade means 8 completely opens the passage 4, the position of the seal curved surface 71 from the position 72 to the position 75 from the rotation axis X at each position is reduced. The distance D is longer than the distance from the rotation axis X of the seal curved surface portion 86 at the corresponding position of the seal member 11, and is also the distance from the rotation axis X at each position of the seal curved surface 61 from the position 64 to the position 75. The distance D is the rotation axis X of the seal curved surface portion 87 at the corresponding position of the seal member 11.
It is longer than the distance from. In this example, the seal curved surface 61 from the position 75 to the position 65 is a substantially flat surface, but is a curved surface as a whole.

As will be described later, the seal curved surfaces 61 and 71 formed on the side end portion 7 have the seal curved surfaces of the seal member 11 in the rotation region of the blade means 8 from the closed rotation position to the passage 4 to the partially open rotation position. The seal member 11 is brought into contact with the portions 86 and 87 to cause elastic deformation (see the hatched portion in FIG. 11), and the blade means 8 moves from the partial open rotation position to the full open rotation position with respect to the passage 4. In the rotating area, the seal curved surface portions 86 and 87 of the seal member 11 are not in contact with each other (see FIGS. 1, 4 and 5).

The rotating means 12 includes a reversible electric motor 91 as a rotating power generating means, and a transmission means 92 for transmitting the rotating power generated by the reversible electric motor 91 to the blade means 8. The reversible electric motor 91 is mounted on a base 93 connected to the frame 5,
Are mounted on a base 93 and are connected to a reduction gear mechanism 94 for reducing the rotation of the output rotation shaft of the reversible electric motor 91, and an output shaft of the reduction gear mechanism 94, and are connected to the base 93 via a bearing 95. A rotatable shaft 96 rotatably supported by
Disk-shaped rotatable member 97 fixed to rotatable shaft 96
And one end of each of the pair of arc slits 98 and 99 formed in the rotatable member 97 with play with respect to the rotation direction of the blade means 8.
1 and the other end of each of the pins 100 and 101, and a shaft member 31 protruding outside from the side wall portion 10.
And a disk member 102 fixed to the base member. The arc slits 98 and 99 are formed in the rotatable member 97 in an axisymmetric manner, and the pins 100 and 101 are also implanted in the disc member 102 in an axisymmetric manner.

The rotation means 12 rotates the rotatable member 97 via the reduction gear mechanism 94 and the rotatable shaft 96 by the operation of the reversible electric motor 91, and the rotation of the rotatable member 97 causes the arc slits 98 and 99 to rotate. The disk member 102 is rotated via the cylindrical pins 100 and 101, each of which is engaged with one end, thereby rotating the blade means 8 in the A and B directions so as to open and close the passage 4. It has become. When the blade means 8 is rotated to the passage opening position (the position shown in FIG. 1) by the engagement between the arc slits 98 and 99 and the pins 100 and 101, the transmission means 92 moves toward the passage closing position. The free rotation of the blade means 8 is allowed.

The biasing means 13 includes a screw pin 111 implanted in the shaft member 31 and a weight 112 screwed to the required number of screw pins 111, and the blade means 8 is moved to the passage closed position. When the shaft member 3 is arranged,
1 to rotate the blade means 8 toward the passage opening position.
The blade means 8 is constantly urged by the urging means 13 so as to be turned toward the passage opening position.

The position of the blade means 8 from the state in which the blade means 8 closes the passage 4 (the position shown in FIG. 11) to the state in which the passage 4 is opened (the position shown in FIG. 1)
For example, the reversible electric motor 9 further includes a detector (not shown) for detecting the rotational position of the rotatable member 97.
Reference numeral 1 designates an operation of which is controlled based on detection signals from these detectors so that the opening degree of the passage 4 by the blade means 8 is set to a predetermined value.

In the above-described ventilation damper 1, when the reversible electric motor 91 is operated at the fully open position of the passage 4 shown in FIG. 1 and its output rotation shaft is rotated forward, the rotatable member 97 is turned as shown in FIG. The shaft member 31 is also rotated in the B direction through the engagement of the arc slits 98 and 99 with the pins 100 and 101, respectively. As a result, the blade means 8 is rotated in the same direction. Then, through the state shown in FIG. 10, the path 4 is closed as shown in FIG. 11.

In the ventilation damper 1, when the blade means 8 rotates in the B direction from the fully open position of the passage 4 to the fully closed position, the blade means 8 rotates, for example, at an angle of about 35 ° in the B direction from the fully open position of the passage 4. Until this is done, the gap between the seal curved surface 71 and the seal curved surface 86 and between the seal curved surface 61 and the seal curved surface 87
When the blade means 8 is further rotated in the direction B by an angle of about 35 ° or more, the seal curved surface 71 starts to gradually contact the seal curved surface portion 86 from the leading end thereof. After the seal curved surface 71 comes into contact with the seal curved surface portion 86 beyond the angle range in which the notch 74 is arranged, while the contact is maintained, the seal curved surface 61 is then moved to the seal curved surface portion 87 by its leading end. When the blade means 8 is finally rotated by about 45 °, the seal curved surface 71
In addition to the contact between the seal curved surface portion 86 and the seal curved surface portion 86, as shown in FIG. 11, all of the seal curved surface 61 contacts the seal curved surface portion 87, and all of the seal curved surface 63 contacts the seal curved surface 62. The sealing member 11 is formed by the curved surface 71, the sealing curved surface 61 and the sealing curved surface 63 to form the sealing curved portion 8.
6. Elastic deformation is performed at the seal curved surface portion 87 and the seal curved surface 62 so that the abutment is performed exactly.

In the fully closed position of the passage 4, the tip portions 38 and 39 of the blade means 8 respectively contact the seal members 23 and 24 to elastically deform the seal members 23 and 24. The flat end surface 77 of the end assisting member 53 closely contacts the end surface 78 to elastically deform the end surface 78. In the above state, the flow of air through the passage 4 is blocked by the blade means 8.

From the state of rotation of the blade means 8 shown in FIG.
When the reversible electric motor 91 is operated and its output rotation shaft is reversed, the rotatable member 97 moves from the state shown in FIG.
As a result, the shaft member 31 is also rotated in the direction A through the engagement of the arc slits 98 and 99 with the pins 100 and 101, respectively, as a result, the blade means 8 is rotated. Is rotated in the same direction, and is rotated through the state shown in FIG. 10 to a state in which the passage 4 is opened as shown in FIG. In this state, the room exterior 26 and the room interior 27
Will flow through each other through the passage 4.

When the blade means 8 rotates in the direction A from the fully closed position of the passage 4 to the fully open position, the ventilation damper 1 rotates the blade means 8 in the direction A from the fully closed position of the passage 4 by an angle of about 10 °.
Until is rotated, since the curved curved surface 14 is in contact with the curved curved surface 9, the blade means 8 is forcibly rotated in the direction A by the reversible electric motor 91. 9 is released, and gaps are generated between the seal curved surface 71 and the seal curved surface portion 86 and between the seal curved surface 61 and the seal curved surface portion 87, respectively. As long as the rotation of the shaft 102 in the direction A is not prevented, the urging means 13
, A rotating force in the direction A is applied, and the blade means 8 is rotated in the direction A so as to open the passage 4 as shown in FIG.

In the ventilating damper 1, when the blade means 8 is rotated by about 35 ° in the direction B from the fully opened position of the passage 4, the space between the seal curved surface 71 and the seal curved surface 86 and the seal curved surface 61 and the seal curved surface 61 Since a gap is formed between each of the curved surface portions 87 and the blade means 8 is merely provided with a rotating force in the direction A by the urging means 13, the disk members are formed by the arc slits 98 and 99. As long as the rotation of the B in the direction B is not blocked, the constant air volume control based on the passage wind speed can be performed. When the air flow 40 is generated, a rotational moment in the B direction is generated in the blade means 8, whereby the blade means 8 is rotated in a direction toward the passage closing position, and is then forced through the passage by strong wind or the like. Indoor In addition to this, it is possible to prevent air from being drawn in and out more than necessary and to cause an unpleasant air flow inside the room, and to prevent dust outside the room from being brought into the room. It is possible to eliminate the inconvenience that the air-conditioning effect is reduced due to the ventilation, and it is possible to prevent an increase in the air-conditioning power for compensating for this.

Further, in the ventilation damper 1, the blade means 8
The distance D of the seal curved surface 14 from the rotation axis X is gradually increased in the opening rotation direction A of the blade means 8, and the seal curved surface 9 of the seal member 11 is complementary to the seal curved surface 14 of the blade means 8. When the blade means 8 is rotated in the closing direction of the passage 4, the seal curved surface 14 gradually approaches the seal curved surface 9 and finally comes into contact with the seal curved surface 9. In addition to completely closing the passage at the side end 7 of the blade means 8, the rotation of the blade means 8 can be made extremely light before abutment.
Generation of noise and the like can be reduced as much as possible, and energy can be saved in the rotation of the blade means 8.

In the ventilation damper 1, even if the blade means 8 or the frame 5 is thermally expanded or slightly deformed or displaced, the blade means 8 for opening and closing the passage can be smoothly rotated to generate noise and the like. There is no danger.

In addition, in the ventilation damper 1, at the end of the rotation of the blade means 8 in the closing direction of the passage 4, the blade means 8
Since the seal curved surfaces 61 and 71 formed at the side end 7 of the seal member 11 can be pressed against the seal curved surface 9 of the seal member 11, the passage can be more completely blocked at the side end of the blade means 8 by this press. Further, since the seal curved surface 14 of the blade means 8 and the seal curved surface 9 of the seal member 11 are not in contact with each other in the rotation region of the blade means 8 from the partially open rotation position to the full open rotation position, the blade The rotation power of the means 8 can be reduced to save energy, and this rotation region can be a constant air volume rotation region.

Further, in the ventilation damper 1, the seal curved surface 14 of the blade means 8 and the seal curved surface 9 of the seal member 11 are brought into contact with each other in the rotation region of the blade means 8 from the closed rotation position to the partially opened rotation position. In addition, the passage can be completely closed, and furthermore, the passage can be more completely closed to cause elastic deformation of the seal member 11 from the closed rotation position to the partially opened rotation position. 8 is also provided on the outer edge of the side end auxiliary member 53, so that even at the notch 74 where the blade side end 57 extends, the seal curved surface 14 of the blade means 8 and the seal member 11 Since the seal curved surface 9 can be brought into contact with each other, it is possible to eliminate a gap around the blade side end 57 in the passage closing, and to achieve a more complete passage closing.

Further, in the ventilation damper 1, the blade means 8 can be forcibly rotated by the rotation means 12, and when the blade means 8 is rotated to the passage open position, the blades move toward the passage closed position. Since the free rotation of the means 8 is allowed, the passage can be forcibly opened and closed, and also the constant air volume control based on the passage wind speed can be performed, and the rotation of the blade means 8 toward the passage open position can be performed. In order to perform the urging by the urging means 13, by appropriately setting the urging force of the urging means 13,
Natural passage closing using the air flow, that is, constant air volume control can be reliably performed.

In the ventilation damper 1, the blade means 8 is rotated by electric power, the passage 4 is inclined, and the inlet hole 2 and the outlet hole 3 are opened in the horizontal and vertical directions, respectively. However, for example, the blade means 8 may be manually rotated, the passage 4 may extend horizontally, and the outlet hole 3 may be opened in the horizontal direction.

In the above example, the disc members 102 are rotated by engaging the closed arc slits 98 and 99 with the pins 100 and 101, respectively. As shown, open circular slits (arc notches) 121 and 122 are formed in the rotatable member 97, and the circular slits 121 and 122 are engaged with the pins 100 and 101, respectively. Member 102
May be rotated.

Further, in the ventilation damper 1, the rotatable member 97 having the arc slits 98 and 99 or 121 and 122 and the arc slit 9 are provided in order to control the constant air volume.
Pin 100 engaging 8 and 99 or 121 and 122
And 101 are provided, but when the constant air volume control is not performed, the rotatable shaft 96 may be directly connected to the shaft member 31.

[0058]

According to the present invention, the passage can be completely closed, the rotation of the blade means can be lightened, and the possibility of noise or the like can be eliminated. It is possible to provide a ventilation damper that can save energy in rotating the means.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an example of a preferred embodiment of the present invention with a passage open.

FIG. 2 is a partial cross-sectional explanatory view of the example shown in FIG. 1 in a passage open state.

FIG. 3 is an exploded perspective view of a part of the example shown in FIG. 1;

FIG. 4 is a longitudinal sectional view of the example shown in FIG. 1 omitting a blade main body.

5 is a longitudinal sectional view of the example shown in FIG. 1 omitting a blade main body and side end members.

FIG. 6 is a front view of the rotating means of the example shown in FIG.

FIG. 7 is a sectional view taken along line VII-VII shown in FIG.

8 is a sectional view taken along line VIII-VIII shown in FIG.

FIG. 9 is an operation explanatory view of the rotating means shown in FIG. 6;

FIG. 10 is an operation explanatory diagram of the example shown in FIG. 1;

FIG. 11 is an operation explanatory diagram of the example shown in FIG. 1;

FIG. 12 is an explanatory diagram of another example of the preferred embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ventilation damper 2 Inlet hole 3 Outlet hole 4 Passage 5 Frame 6 Blade main body part 7 Side end part 8 Blade means 9 Seal curved surface 10 Side wall part 11 Seal member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Nobutaka Sato, Inventor Nippon Sekkei Co., Ltd. 6-5-1, Nishishinjuku, Shinjuku-ku, Tokyo (72) Koji Hirose, Inventor Koji Hirose 6-5-1, Nishishinjuku, Shinjuku-ku, Tokyo Nippon Sekkei Co., Ltd. (72) Inventor Takashi Yanai 6-5-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo, Japan Nippon Sekkei Co., Ltd. (72) Kenji Fukuiri 1118 Ideniwa, Ritsuto-cho, Kurita-gun, Shiga Prefecture Oil industry shares (72) Inventor Kenichi Iriuchijima 1118 Ideniwa, Ritsuto-cho, Kurita-gun, Shiga Prefecture F-term (reference) 3L081 AA03 AA08 AB01 GA03 HA01 HB06

Claims (8)

[Claims] 1. A frame having a passage having an inlet hole and an outlet hole formed therein, and a rotatably disposed inside the frame so as to open and close the passage by rotation, and having a seal curved surface at an axial end. A blade means, and an elastic seal member having a seal curved surface with which the seal curved surface of the blade means abuts and being fixed to a side wall of the frame, wherein the seal curved surface of the blade means The distance from the rotation axis of the blade means is gradually increased in the opening rotation direction, and the seal curved surface of the seal member is
A ventilation damper having a shape complementary to the seal curved surface of the blade means. 2. The distance of each part of the seal curved surface of the blade means from the rotation axis of the blade means at a corresponding position of the seal member is longer than the distance from the rotation axis of the blade means at the corresponding position of the seal member. The ventilation damper according to the item. 3. The seal curved surface of the blade means abuts against the seal curved surface of the seal member in a rotation region of the blade means from a closed rotation position to a passage to a partially open rotation position with respect to the passage, and fully opens rotation from the partially open rotation position with respect to the passage. The ventilation damper according to claim 1, wherein in a rotation region of the blade means up to the position, the blade is not in contact with the seal curved surface of the seal member. 4. The seal member according to claim 1, wherein the curved surface of the seal of the blade means elastically deforms the seal member in a rotation region of the blade means from a closed rotation position to a partially opened rotation position with respect to the passage. A ventilation damper according to any one of the preceding claims. 5. The blade means includes: a blade main body having a shaft portion and a pair of blade portions extending radially from the shaft portion; and a side end provided at an axial end of the blade main body. And a pair of side ends, which are arranged at the axial end of the shaft portion and the axial end of each blade portion, and extend radially integrally from the central portion. A blade-side end portion, a central portion and an enlarged portion integrally formed at one blade-side end portion, and a side end auxiliary portion disposed at an axial end of the central portion,
The seal curved surface of the blade means is provided on the outer edge of the enlarged portion and the side end auxiliary portion, and the seal member has a notch extending at one blade side end. The ventilation damper according to claim 1. 6. The blade means is constantly urged to rotate toward the passage opening position, and generates a rotational moment toward the passage closing position by an airflow passing through the passage. The ventilation damper according to claim 1. 7. A rotating means for forcibly rotating the blade means, the rotating means comprising: a rotating power generating means;
A transmitting means for transmitting the rotating power generated by the rotating power generating means to the blade means, wherein the transmitting means comprises: a blade heading toward the passage closing position when the blade means is rotated to the passage opening position. The ventilation damper according to any one of claims 1 to 6, wherein a free rotation of the means is allowed. 8. The ventilation damper according to claim 1, further comprising an urging means for urging the blade means so that the blade means is rotated toward the passage opening position. .