JP4362918B2 - Ventilation damper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
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.
[0002]
[Problems to be solved by the invention]
Usually, in this type of ventilation damper, fins are rotatably arranged in a frame defining the passage, and the degree of ventilation through the passage is controlled by determining the opening degree of the passage by the rotation of the fin. ing.
[0003]
By the way, in the ventilation damper, it is preferable that the passage blockage by the fin is completely performed so that air leakage does not occur. However, between the side wall of the frame defining the passage and the side end surface of the fin, the passage opening / closing is not performed. In order to ensure the rotation of the fin for this purpose, a slight gap is usually provided, and this gap makes it difficult to completely close the passage by the fin.
[0004]
Then, if the gap between the side wall and the side end surface of the fin is made zero in order to completely close the passage, the side wall of the side wall and the side end surface of the fin are caused by thermal expansion of the fin or the frame or slight deformation or displacement thereof. The contact of the fin more tightly than necessary prevents the fin from rotating smoothly. In some cases, the fin cannot be rotated at all, or even if it can be rotated, a large unpleasant friction sound, that is, noise, etc. May occur.
[0005]
The present invention has been made in view of the above-described points, and the object of the present invention is to completely close the passage by the fin, and to smoothly rotate the fin for opening and closing the passage. Thus, an object of the present invention is to provide a ventilation damper that is free from noise and the like.
[0006]
[Means for Solving the Problems]
The ventilation damper of the first aspect of the present invention includes a frame having a passage having an inlet hole and an outlet hole therein, a fin that is rotatably disposed in the frame so as to open and close the passage by rotation, Rotating means for rotating the fin to open and close the passage by the fin, disk-shaped housings arranged at both ends in the axial direction of the fin, and the outer peripheral surface of the housing are always in contact with A pair of side closing members that protrude toward the passage side in the axial direction and are attached to both sides of the frame so as to come into contact with both edges in the axial direction of the fin when the fin is rotated to the passage closing position by the moving means. A pair of side closing members, and a tip closing member attached to the frame so as to come into contact with the tip of the fin when the fin is rotated to the passage closing position by the rotating means; It has.
[0007]
The ventilation damper according to the first aspect includes a pair of side closing members and tip closing members that come into contact with both edges and the tip of the fin in the axial direction. Even if the surface is not arranged on the frame without a gap, the passage can be completely closed, and the fin can be smoothly rotated to open and close the passage even if the fin or the frame is thermally expanded or slightly deformed or displaced. Thus, there is no risk of noise.
[0008]
In the ventilation damper according to the second aspect of the present invention, in the ventilation damper according to the first aspect, each of the side closing member and the tip closing member is formed of an elastic body.
[0009]
According to the ventilation damper of the second aspect, it is possible to press the edge portions and the tip portions of the fins in the axial direction exactly with the elastic reaction force against the side closing member and the side closing member made of an elastic body. , Can more completely occlude the passage.
[0010]
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 side closing member has an arc surface that is always in contact with the outer peripheral surface of the corresponding housing.
[0011]
According to the ventilation damper of the third aspect, since the side closing member and the outer peripheral surface of the corresponding housing are in arc contact with each other, air leakage through the side closing member and the outer peripheral surface of the housing is completely prevented. Can be eliminated.
[0012]
In the ventilation damper according to the fourth aspect of the present invention, in the ventilation damper according to any one of the first to third aspects, the fin includes a shaft portion and a pair of fin bodies extending integrally from the shaft portion in the radial direction. The fin body portion is curved at its tip, and the side closing member is the tip at both edges in the axial direction of the fin when the fin is rotated to the passage closing position. It has the curved surface which contacts in a part.
[0013]
According to the ventilation damper of the fourth aspect, each of the side closing member and the fin has a curved surface, and the curved surfaces come into contact with each other. Can be achieved.
[0014]
In the ventilation damper according to the fifth aspect of the present invention, in the ventilation damper according to the fourth aspect, the housing is in intimate contact with the corresponding end surfaces of the shaft portion and the pair of fin main body portions.
[0015]
In the ventilation damper according to the sixth aspect of the present invention, in the ventilation damper according to the fourth or fifth aspect, the rotating means transmits the rotational power generating means and the rotational power generated by the rotational power generating means to the fins. A transmission means for allowing the fin to freely rotate toward the passage closing position when the fin is turned to the passage opening position. The tip of the fin body portion is always biased so as to be rotated toward the open position, and the tip of the fin body portion is curved so as to generate a rotational moment in the fin toward the passage closed position by the air flow passing through the passage. Yes.
[0016]
According to the ventilation damper of the sixth aspect, when the fin is rotated to the passage opening position, the fin is allowed to freely rotate toward the passage closing position, and the front end of the fin main body portion. Since the part is curved so that a rotational moment toward the passage closing position is generated in the fin due to the air flow passing through the passage, an urging force for constantly urging the fin toward the passage opening position is appropriately set. By doing so, when a large pressure difference occurs inside and outside of the room and an air flow having a flow velocity above a certain level, for example, an air flow of 3 m / sec or more, is generated, the passage can be naturally blocked using this air flow. Therefore, it is possible to prevent air from being unnecessarily introduced into the room through the passage due to strong winds and the like, and uncomfortable airflow to occur in the room, and to bring outdoor dust into the room. Eliminate Bets can be, moreover, it is possible to prevent ventilated unnecessarily indoor air-obtained eliminate inconveniences conditioning effect is reduced, an increase in the air-conditioning power to compensate for this.
[0017]
In the ventilation damper of the sixth aspect, the transmission means is connected with one end attached to a disk-shaped housing disposed at one end in the axial direction of the fin as in the ventilation damper of the seventh aspect of the present invention. Even if the member and the other end of the connecting member have an arc slit engaged with play in the rotation direction of the fin and have a rotatable member connected to the rotational force generating means, Like the ventilation damper of the eighth aspect of the present invention, the rotatable member connected to the rotational power generating means, the arc slit provided in the disk-shaped housing, and one end are fixed to the rotatable member, The other end may include a connecting member engaged with the arc slit with play in the rotation direction of the fin. When the transmission means is configured as in the ventilation damper of the seventh or eighth aspect, and the elastic means of the tenth aspect described later is provided, the elastic means has one end at the frame and the other end at the other end. It is good to comprise and comprise the coil spring connected with the disk-shaped housing.
[0018]
In the ventilation damper according to the ninth aspect of the present invention, in the ventilation damper according to any one of the fourth to eighth aspects, one surface of the fin main body portion in the vicinity of the tip portion and its vicinity is curved so as to be a convex surface. The other surface is curved so as to be a concave surface.
[0019]
The ventilation damper according to the tenth aspect of the present invention is the ventilation damper according to any one of the fourth to ninth aspects, further comprising elastic means that resists free rotation of the fin toward the passage closing position. Is always urged by this elastic means so as to be rotated toward the passage opening position.
[0020]
According to the ventilation damper of the tenth aspect, the natural passage using the air flow is set by appropriately setting the elastic force of the elastic means in order to perform the rotational biasing of the fin toward the passage opening position by the elastic means. Occlusion can be reliably performed.
[0021]
In the ventilation damper according to the eleventh aspect of the present invention, in the ventilation damper according to any of the fourth to tenth aspects, one fin main body is heavier than the other fin main body, and the fin is a pair of fins. It is always urged to rotate toward the passage opening position due to the difference in weight of the main body.
[0022]
As in the ventilation damper of the eleventh aspect, the rotational biasing of the fins toward the passage opening position may be performed by the difference in the weights of the pair of fin body parts, and the difference in the weights of the pair of fin body parts. In order to achieve the above, a pair of fin body portions are formed symmetrically with respect to the shaft portion, and one fin body portion is solid, and a cavity is provided in the other fin body portion, or one fin body portion. Further, one fin main body portion may be formed longer than the other fin main body portion so that the pair of fin main body portions are asymmetric with respect to the shaft portion.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
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.
[0024]
1 to 7, the ventilation damper 1 of the present example includes a frame 5 having a passage 4 having an inlet hole 2 and an outlet hole 3 therein, and a frame 5 that opens and closes the passage 4 by rotation. The fins 6 that are movably disposed, the rotating means 7 that rotates the fins 6 to open and close the passages 4 by the fins 6, and the disk-shaped housings disposed at both ends of the fins 6 in the axial direction 8 and 9 and the outer peripheral surfaces 10 and 11 of the respective housings 8 and 9 are always in contact with each other, and when the fin 6 is rotated to the passage closed position (position shown in FIG. 1) by the rotating means 7, A pair of side closing members 14 made of an elastic body such as rubber and protruding on the side of the passage 4 in the axial direction and attached to both sides of the frame 5 so as to come into contact with both edges 12 and 13 in the axial direction of the fin 6 and 15 and a pair of side closing members 14 and 15 are bridged, When the fin 6 is rotated to the passage closing position by 7, the tip end blocking members 18 and 19 made of an elastic body such as rubber attached to the frame 5 so as to come into contact with the tip ends 16 and 17 of the fin 6. It is equipped with.
[0025]
The frame 5 is integrally provided with an upper wall portion 31, a lower wall portion 32 arranged to face downward with respect to the upper wall portion 31, and side wall portions 33 and 34 facing each other in the axial direction. The passage 4 including the inlet hole 2 and the outlet hole 3 formed so as to be surrounded by the upper wall portion 31, the lower wall portion 32, and the side wall portions 33 and 34, prevents rainwater from entering and preventing the outdoor portion 35 and the indoor portion 36. An opening is made through each of the bird plate 37 and the dust net 38.
[0026]
The rainwater intrusion prevention / bird-proof board 37 having a plurality of ridges and openings is disposed between the horizontal sashes 39 and 40 to which the frame 5 is attached, and the dust-proof net 38 is attached to the frame 5.
[0027]
The fin 6 includes a hollow shaft portion 41 and a pair of fin body portions 42 and 43 formed integrally extending radially and axially from the shaft portion 41. Each of 43 is curving in the front-end | tip parts 16 and 17 and its vicinity.
[0028]
One surface 101 of the fin body portion 42 in the front end portion 16 and the vicinity thereof is curved to be convex toward the curved surface 83 described later, that is, curved to be a convex surface, and the other surface 102 is The curved surface is curved so as to be complementary to the surface 101. Similarly, one surface 103 of the fin main body 43 in the vicinity of the front end portion 17 and the vicinity thereof is convex toward the curved surface 84 described later. That is, it is curved to be a convex surface, and the other surface 104 is curved to be a concave surface complementary to the surface 103. The curved shape of the fin main body portions 42 and 43 in the vicinity of the tip portions 16 and 17 and the vicinity thereof is such that when the air flow A is generated in the passage 4 in the open state of the passage 4 by the fins 6 (position shown in FIG. 2). The fin main body portion 42 generates a lift force toward the curved surface 83 and the fin main body portion 43 generates a lift force toward the curved surface 84, and the fin 6 is rotated so as to move toward the passage closing position by a rotational moment based on the lift force. I will let you.
[0029]
The housings 8 and 9 are integrally fixed to the end surfaces of the fin main body portions 42 and 43, and the housings 8 and 9 are respectively corresponding end surfaces of the shaft portion 41 and the pair of fin main body portions 42 and 43. In close contact. The casing 8 integrally includes a small-diameter flange 44 and a large-diameter flange 53, and the flange 9 also includes a small-diameter flange 45 and a large-diameter flange 54. One end of the rotary shaft 52 is fixed to the large-diameter flange portion 54, and a cylindrical portion 46 that integrally extends in the axial direction is formed in the large-diameter flange portion 53.
[0030]
The rotating means 7 includes a reversible electric motor 61 as a rotational power generating means and a transmission means 62 for transmitting the rotational power generated by the reversible electric motor 61 to the fins 6. The reversible electric motor 61 is attached to a base 63 connected to the frame 5, and the transmission means 62 is attached to the base 63 to reduce the rotation of the output rotation shaft of the reversible electric motor 61. 64 and a rotary shaft 51 connected to the output shaft of the reduction gear mechanism 64 and rotatably supported by a base 63 via a bearing 65, and a disc-like rotatable fixed to the rotatable shaft 51. One end of each of the member 47 and the pair of arc slits 48 and 49 formed in the rotatable member 47 is engaged with play with respect to the rotation direction of the fin 6, and the other end of each is engaged with the large-diameter flange 53. A pair of cylindrical pins 50 and 55 as integrally connected connecting members, and an elasticity that resists free rotation of the fin 6 toward the passage closing position when the fin 6 is turned to the passage opening position. Means 20 It is. The arc slits 48 and 49 are formed in the rotatable member 47 with axial symmetry, and the pins 50 and 55 are also planted in the large-diameter flange 53 with axial symmetry.
[0031]
The elastic means 20 has one end 56 connected to the large-diameter flange portion 53 of the housing 8 and the other end 57 connected to the side wall portion 33 of the frame 5 via the connection fitting 58, and a screw disposed around the cylindrical portion 46. The connection metal fitting 58 has one end fixed to the side wall portion 33 via a screw 60, and the other end 57 of the coil spring 59 is hooked to the other end. The spring 59 always urges the large-diameter flange portion 53 of the casing 8 elastically so as to rotate the fin 6 to the open position of the passage 4. Thus, the fin 6 is always urged so as to be rotated toward the opening position of the passage 4.
[0032]
The rotating means 7 rotates the rotatable member 47 via the reduction gear mechanism 64 and the rotatable shaft 51 by the operation of the reversible electric motor 61, and the rotation of the rotatable member 47 causes the arc slits 48 and 49 to respectively rotate. The large-diameter flange 53 is rotated through cylindrical pins 50 and 55 engaged with the respective one ends, and thereby the fin 6 is rotated so as to open and close the passage 4.
[0033]
Each of the large-diameter flange portions 53 and 54 is rotatably supported by the side wall portions 33 and 34, and the outer peripheral surface of each of the large-diameter flange portions 53 and 54 and the large-diameter flange portions 53 and 54 are arranged. O-rings 71 and 73 are disposed between the inner peripheral surfaces of the side wall portions 33 and 34 that define the circular holes to be formed.
[0034]
The rotatable shaft 52 fixed to the large-diameter flange portion 54 is rotatably supported by a base 75 connected to the frame 5 via a bearing 76.
[0035]
Each of the pair of side closing members 14 disposed symmetrically with respect to the shaft portion 41 and fixed to the side wall portion 33 has arcuate surfaces 77 and 78 that always contact the outer peripheral surface 10 of the small-diameter flange portion 44 of the housing 8. In addition, when the fin 6 is rotated to the passage closing position, the plane 81 that contacts the axial edges of the fin main bodies 42 and 43, which are the axial edges 12 of the fin 6, and 82 and curved surfaces 83 and 84 connected to the planes 81 and 82.
[0036]
Each of the pair of side closing members 15 disposed symmetrically with respect to the shaft portion 41 and fixed to the side wall portion 34 is also similar to each of the pair of side closing members 14 of the small-diameter flange 45 of the housing 9. The fin main body part 42 which has the circular arc surface (not shown) which always contacts the outer peripheral surface 11 and is the edge 13 in the axial direction of the fin 6 when the fin 6 is rotated to the passage closing position. And a flat surface (not shown) in contact with the axial edges of each of 43 and 43 and a curved surface (not shown) connected to the flat surface.
[0037]
The front end closing member 18 is fitted to the upper wall 31 between the side closing members 14 and 15 on the upper wall 31 side, and the side closing on the upper wall 31 side at both ends thereof. The front end closing member 19 is fitted to the lower wall portion 32 between the side closing members 14 and 15 on the lower wall portion 32 side, and is fitted to the members 14 and 15, respectively. Is fitted to the side closing members 14 and 15 on the lower wall portion 32 side.
[0038]
The ventilation damper 1 is in the state from the state in which the fin 6 closes the passage 4 (position shown in FIGS. 1, 6 and 7) to the state in which the passage 4 is opened (position shown in FIGS. 2, 8 and 9). Detectors (not shown) for detecting the positions of the fins 6 are further provided. The reversible electric motor 61 is controlled in operation based on detection signals from these detectors, and the passage 4 by the fins 6. Is set to a predetermined value.
[0039]
In the ventilation damper 1 described above, when the reversible electric motor 61 is operated in the fully open position of the passage 4 shown in FIGS. , 49 and the pins 50 and 55, respectively, and are rotated so that their edges 12 and 13 contact the side closure members 14 and 15, respectively, as shown in FIG. The distal end portions 16 and 17 are in contact with the distal end portion closing members 18 and 19 to close the passage 4. In this state, the air flow through the passage 4 is blocked by the fins 6.
[0040]
When the reversible electric motor 61 is operated from the state of the fin 6 shown in FIGS. 1, 6, and 7 and the output rotation shaft 26 is reversed, the fin 6 is biased by the elastic force of the coil spring 59. It is rotated so that the passage 4 shown in FIGS. 2, 8, and 9 is fully opened. In this state, the air in the outdoor portion 35 and the indoor portion 36 is circulated through the passage 4.
[0041]
In the ventilation damper 1, the passage 4 can be completely closed without disposing both end surfaces of the fin 6 in the axial direction on the side wall portions 33 and 34 of the frame 5 without a gap, and thermal expansion of the fin 6 or the frame 5 or Even with these slight deformations and displacements, the fins 6 for smoothly opening and closing the passage can be smoothly rotated, and there is no risk of noise or the like.
[0042]
Further, since the side closing members 14 and 15 and the tip end closing members 18 and 19 of the ventilation damper 1 are made of an elastic body, both the edge portions 12 and 13 and the tip portions 16 and 17 of the fin 6 are elastically opposed to them. Since it can be pressed tightly with force, the passage 4 can be closed more completely. In addition, since the side closure members 14 and 15 of the ventilation damper 1 and the outer peripheral surfaces 10 and 11 of the corresponding enclosures 8 and 9 are in arc contact, the side closure members 14 and 15 and the enclosures 8 and 9 are in contact with each other. Air leakage through the outer peripheral surfaces 10 and 11 can be completely eliminated.
[0043]
Furthermore, in the ventilation damper 1, each of the side blocking members 14 and 15 and the fin 6 has curved surfaces, and the curved surfaces contact each other, so that the contact area is widened, and the passage blockage is more completely performed. Can be achieved.
[0044]
In the ventilation damper 1, as shown in FIGS. 2, 8, and 9, when the fin 6 is rotated to the passage opening position, the fin 6 is allowed to freely rotate toward the passage closing position. In addition, since the coil spring 59 is designed to resist free rotation of the fin 6 toward the passage closing position, by setting the elastic force of the coil spring 59 appropriately, When an air flow A having a flow velocity of a certain level or more from the outdoor space 35 to the indoor space 36 or from the indoor space 36 to the outdoor space 35 is generated in the passage 4 based on the atmospheric pressure difference, for example, the passage blockage position The fins 6 can be naturally rotated in the direction toward the interior of the room 36. Thus, the indoor / outside 36 and the large atmospheric pressure difference between the 35 due to the strong winds of the outdoor 35 and the like are more than necessary with respect to the room 36 via the passage 4. Air enters and exits It is in, along with may eliminate causing uncomfortable airflow A to chamber 36, may eliminate the like bring the dust of the outdoor 35 to chamber 36. In addition, in the ventilation damper 1, since the fin main body portions 42 and 43 are curved as described above at the front end portions 16 and 17 and in the vicinity thereof, the rotational moment in a fixed direction is caused by the air flow A in the passage 4. As a result, the passage 4 can be reliably closed with an air flow A having a flow velocity of a certain level or higher, for example, an air flow A of 3 m / sec or higher.
[0045]
In the ventilation damper 1, the fins 6 are electrically rotated, the passage 4 is inclined, and the inlet hole 2 and the outlet hole 3 are opened in the horizontal direction, but the present invention is not limited thereto. For example, the fin 6 may be manually rotated, the passage 4 may be extended horizontally, and the outlet hole 3 may be opened in the vertical direction.
[0046]
【The invention's effect】
According to the present invention, there is provided a ventilation damper that can completely close a passage by fins and that can smoothly rotate the fins for opening and closing the passage without causing a noise or the like. be able to.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an example of a preferred embodiment of the present invention in a closed passage state.
FIG. 2 is a longitudinal sectional view of the example shown in FIG.
FIG. 3 is a longitudinal sectional view of the example shown in FIG. 1 with the fins omitted.
FIG. 4 is an explanatory diagram from the inside of the example shown in FIG. 1;
FIG. 5 is an enlarged explanatory view from the indoor portion of the example shown in FIG. 1;
6 is a cross-sectional view taken along line VI-VI shown in FIG. 4 in a state where a passage is closed by a fin.
7 is a cross-sectional view taken along line VII-VII shown in FIG. 4 in a state in which a passage is blocked by a fin.
8 is a cross-sectional view taken along line VI-VI shown in FIG. 4 in a state in which a passage is opened by a fin.
9 is a cross-sectional view taken along the line VII-VII shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ventilation damper 2 Inlet hole 3 Outlet hole 4 Passage 5 Frame 6 Fin 7 Rotating means 8, 9 Housing 10, 11 Outer peripheral surface 12, 13 Edge part 14, 15 Side block member 16, 17 Tip part 18, 19 Tip Blocking member

Claims (11)

A frame having a passage having an inlet hole and an outlet hole therein, a fin rotatably disposed in the frame so as to open and close the passage by rotation, and a fin to rotate the fin to open and close the passage. Rotating means for moving, disk-shaped casings disposed at both ends of the fin in the axial direction, and always contacting the outer peripheral surface of the casing, and the rotating means rotates the fins to the passage closing position. A pair of side blocking members that protrude toward the passage in the axial direction and are attached to both sides of the frame so as to contact both edges of the fin in the axial direction, and a pair of side blocking members A ventilation damper having a tip closing member attached to the frame so that the tip of the fin contacts the tip closing portion when the fin is turned to the passage closing position by the turning means. The ventilation damper according to claim 1, wherein each of the side closing member and the tip closing member is formed of an elastic body. The ventilation damper according to claim 1 or 2, wherein the side closing member has an arc surface that is always in contact with the outer peripheral surface of the corresponding housing. The fin includes a shaft portion and a pair of fin main body portions integrally extending in the radial direction from the shaft portion. The fin main body portion is curved at a tip portion thereof, and the side closing member is The ventilation damper according to any one of claims 1 to 3, further comprising a curved surface that comes into contact with tip portions at both edge portions in the axial direction of the fin when the fin is rotated to the passage closing position. The ventilation damper according to claim 4, wherein the housing is in close contact with the corresponding end surfaces of the shaft portion and the pair of fin main body portions. 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 fin. The transmitting means rotates the fin to the passage opening position. In this case, the fin is allowed to freely rotate toward the passage closing position, and the fin is always urged to rotate toward the passage opening position. The ventilation damper according to claim 4 or 5, wherein the airflow passing through the passage is curved so that a rotational moment toward the passage closing position is generated in the fin. The transmission means includes a connecting member having one end attached to a disk-shaped housing disposed at one end in the axial direction of the fin, and an arc slit in which the other end of the connecting member is engaged with play in the rotation direction of the fin. The ventilation damper according to claim 6, further comprising: a rotatable member connected to the rotational power generating means. The transmission means includes a rotatable member connected to the rotational power generating means, an arc slit provided in a disk-shaped housing disposed at one end in the axial direction of the fin, and one end fixed to the rotatable member. The ventilation damper according to claim 6, wherein the other end includes a connecting member engaged with the arc slit with play in the rotation direction of the fin. 9. The front end portion and one surface of the fin body portion in the vicinity thereof are curved so as to be a convex surface, and the other surface is curved so as to be a concave surface. The ventilation damper as described in the paragraph. 5. An elastic means for resisting free rotation of the fin toward the passage closing position is further provided, and the fin is always urged to rotate toward the passage opening position by the elastic means. The ventilation damper according to any one of 1 to 9. The one fin main body is heavier than the other fin main body, and the fins are constantly urged to rotate toward the passage opening position due to the difference in weight of the pair of fin main bodies. The ventilation damper according to any one of 10.

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