JP4857966B2 - Ventilation equipment - Google Patents

Description

  In order to ventilate the interior and the exterior of buildings such as office buildings, apartment houses, detached houses, warehouses, etc., the present invention is attached to the unoccupied part or the side plate part of these window sashes to reduce the degree of ventilation. It relates to a ventilator to be controlled.

JP 2003-21385 A

  For example, in Patent Document 1, a passage having an inlet hole and an outlet hole is rotatably disposed in a frame body, and includes blades that open and close the passage by rotation based on an air flow flowing through the passage. Ventilation devices have been proposed.

  By the way, in such a ventilator, depending on the size of the airflow flowing through the passage, the blades may rapidly rotate, and halation and galloping may occur.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a ventilator that does not cause rapid rotation of the blades and can prevent the occurrence of halation and galloping. It is in.

  The ventilator according to the present invention has a frame body having a passage having an inlet hole and an outlet hole therein, and is constantly biased toward the passage opening position, and closes the passage based on the air flow flowing through the passage. A blade disposed rotatably in the frame body, and a resistance force applying means connected to the blade and imparting a resistance force against the rotation of the blade to the blade. And a pair of blade main body portions integrally extending in the radial direction from the shaft portion, and the tip of the blade main body portion has an air flow flowing through the passage. Is curved so as to cause the blade to generate a rotational moment toward the passage closed position, and the resistance applying means is connected to the shaft portion of the blade, and the blade is rotated toward the passage open position and the passage closed position. At least of the rotation of the feathers It is provided with a damper to produce resistance forces against the one rotating.

  According to the ventilator of the present invention, in particular, there is provided a resistance applying means that is connected to the blade and applies a resistance force against the rotation of the blade to the blade, and the resistance applying means is provided on the blade. The damper is connected to the shaft portion and includes a damper that generates a resistance force against rotation of at least one of the rotation of the blade toward the passage opening position and the rotation of the blade toward the passage closing position. Thus, rapid rotation is not caused, and the occurrence of halation and galloping can be prevented.

  In a preferred example of the ventilator of the present invention, the damper does not generate a resistance force against the rotation of the blades toward the passage opening position, while the damper is a unidirectional damper that generates a resistance force against the rotation of the blades toward the passage closing position. It may consist of a one-way damper that does not produce resistance against the rotation of the blade toward the passage closed position, but produces resistance against the rotation of the blade towards the passage open position. Further, it may be composed of a bidirectional damper that generates a resistance force against the rotation of the blade toward the passage opening position and the rotation of the blade toward the passage closing position.

  In a preferred example of the ventilator according to the present invention, it is further provided with a biasing means having a weight provided on the blade, and the blade is rotated toward the passage opening position by its own weight. It is always energized. According to such a preferable example, the constant air volume control of the air flow by the blades can be performed more suitably.

  In a preferred example of the ventilator of the present invention, the blade main body positioned below the shaft portion of the pair of blade main body portions when the blade is in the passage open position so as to be constantly biased toward the passage open position. The weight on the part side is heavier than the weight on the blade body part side located above the shaft part of the pair of blade body parts when the blade is in the passage opening position.

  According to the present invention, it is possible to provide a ventilator that does not cause rapid rotation of the blades and can prevent the occurrence of halation and galloping.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  1 to 4, a ventilation device 1 of this example installed on a building wall includes a frame 5 having a passage 4 having a rectangular inlet hole 2 and an outlet hole 3 therein, and (a The blades 6 are always urged toward the passage opening position shown in FIG. 5 and are rotatably arranged in the frame 5 so as to close the passage 4 based on the air flow flowing through the passage 4. A resistance force applying means 9 that is connected and applies resistance force against the rotation of the blade 6 to the blade 6, and a biasing means 7 that includes a weight 51 provided on the blade 6. ing.

  For example, as shown in FIGS. 3A and 3B, the inlet hole 2 is disposed downward and the outlet hole 3 is disposed upward. The inlet hole 2 is opened outside the building. 3 is open inside the building. A dust-proof net, a bird-proof net, or the like may be attached to the frame 5 on the outlet hole 3 side. The air introduced from the inlet hole 2 is led out from the outlet hole 3 through the passage 4.

  The frame 5 is opposed to each other in the front-rear direction Y, and the front frame 21 and the rear frame 22 that cooperate with each other to define the inlet hole 2 and the outlet hole 3, and the front frame 21 and the rear frame 22. Side wall plates 23 and 24 fixed to both ends in the axial direction X are provided. The axial direction X is orthogonal to the front-rear direction Y. In this example, the passage 4 extends in the vertical direction, and the blades 6 extend in the substantially vertical direction in the passage open state shown in FIG. 3A, and in the passage closing position shown in FIG. It is arranged extending in a substantially horizontal direction.

  The blade 6 includes a shaft portion 31 extending in the axial direction X rotatably supported by the side wall plates 23 and 24, and a pair of blade body portions 32 and 33 extending integrally from the shaft portion 31 in the radial direction. The tip portions 34 and 35 of the blade main body portions 32 and 33 generate a rotational moment from the passage open position to the passage closed position, that is, a rotational moment in the B direction in the blade 6 due to the airflow flowing through the passage 4. It is curved to let you.

  One surface 41 of the blade body portion 32 in the front end portion 34 and the vicinity thereof is curved so as to be convex toward the rear frame 22 in FIG. 3A, and the other surface 42 is in FIG. In (a), it is curved so as to be concave toward the front frame 21. One surface 43 of the tip 35 and the blade main body 33 in the vicinity thereof is curved so as to be convex toward the front frame 21 in FIG. 3A, and the other surface 44 is In (a) of FIG. 3, it is curved so as to be concave toward the rear frame 22. The curved shapes of the blade main bodies 32 and 33 in the vicinity of the tip portions 34 and 35 and the vicinity thereof are such that when an air flow from the inlet hole 2 to the outlet hole 3 is generated in the passage 4 in the opened state of the passage 4 by the blade 6. The blade main body 32 generates a lift toward the rear frame 22, and the blade main body 33 generates a lift toward the front frame 21, and the blade 6 is directed to the passage closing position by a rotational moment based on the lift. It is rotated in the B direction.

  In the blade 6, the rotational positions in the A and B directions are determined in accordance with the magnitude of the air flow from the inlet hole 2 toward the outlet hole 3 in the passage 4. When the blade 6 is rotated in the B direction against the rotational force in the A direction due to the weight of the weight 51 of the urging means 7 due to a large air flow from the inlet hole 2 to the outlet hole 3 in the passage 4. As shown in FIG. 3 (b), when the passage 4 is closed and such a large air flow stops flowing into the passage 4, it is rotated in the direction A by the dead weight of the weight 51, and the magnitude of the air flow. For example, as shown in FIG. 3 (a), the passage 4 is opened at the rotational position corresponding to. By the rotation of the blade 6 based on such an air flow, the constant air volume control of the air flow flowing through the passage 4 from the inlet hole 2 toward the outlet hole 3 can be performed.

  The urging means 7 is fixed to one end of the shaft portion 31 via a shaft 52 extending in a direction orthogonal to the axial direction X, and applies a rotational force in the A direction toward the passage opening position to the blade 6 by its own weight. A weight 51 is provided. The blade 6 is always urged so as to be rotated in the direction A from the passage closed position toward the passage open position by the dead weight of the weight 51.

  The weight 51 is rotated around the shaft portion 31 based on the rotation of the blades 6 in the A and B directions. As shown in FIG. 4B, when the weight 51 is arranged side by side with the shaft portion 31 in the substantially horizontal direction, the rotational force in the A direction applied to the blade 6 at the passage closed position is large. As shown in a), when the weight 51 is disposed below the shaft portion 31 in the substantially vertical direction, the rotational force in the A direction applied to the blades 6 at the passage opening position is small, and the weight 51 has a shaft in the vertical direction. When the rotary force is gradually rotated from the position arranged side by side with the portion 31 toward the position arranged side by side with the shaft portion 31 in the horizontal direction, the rotational force in the A direction gradually increases with the rotation. .

  The biasing means 7 can change the mounting position of the weight 51 with respect to the shaft 52 in the longitudinal direction of the shaft 52 so that the rotational force in the A direction toward the passage opening position applied to the blade 6 can be adjusted as desired. It has become. The urging means 7 increases the rotational force in the A direction applied to the blade 6 by separating the weight 51 from the shaft portion 31 and mounting it on the shaft 52, and causes the weight 51 to approach the shaft portion 31. By mounting on the shaft 52, the rotational force in the A direction applied to the blade 6 can be reduced. Further, the rotational force in the A direction applied to the blade 6 can also be adjusted by increasing or decreasing the number of weights 51.

  The resistance applying means 9 is connected to the shaft portion 31 of the blade 6 and at least one of rotation in the A direction of the blade 6 toward the passage opening position and rotation in the B direction of the blade 6 toward the passage closing position. Viscous damper that produces a viscous resistance against the rotation of the blade 6, in this example, does not produce a viscous resistance against the rotation of the blade 6 toward the passage opening position in the A direction, while the B direction of the blade 6 toward the passage closing position A one-way damper 61 that generates a viscous resistance force that resists the rotation of is provided. The one-way damper 61 is fixed to the side wall plate 23 via a mounting plate or the like.

  The unidirectional damper 61 generates a large viscous resistance force when the rotation of the shaft portion 31 of the blade 6 is fast, and a small viscous resistance force when the rotation is slow.

  The resistance applying means 9 includes a unidirectional damper 61 in this example, but instead of this, no viscous resistance force is generated against the rotation in the B direction of the blade 6 toward the passage closing position. There may be provided a one-way damper that generates a viscous resistance force against the rotation of the blade 6 in the A direction toward the open position. In addition, the resistance applying means 9 includes a one-way damper 61 in this example, but instead of this, rotation of the blade 6 toward the passage opening position in the A direction and B of the blade 6 toward the passage closing position are performed. A bidirectional damper that generates a viscous resistance force that resists rotation in the direction may be provided. Further, the resistance force applying means 9 may be provided with, for example, a friction damper that applies a friction resistance force against the rotation of the blade 6 to the blade 6 instead of the viscous damper including the one-way damper 61 and the like. This can also prevent galloping.

  The constant air volume control of the air flow by the ventilation device 1 of this example is as follows. In the blade 6, the rotational positions in the A and B directions are determined in accordance with the magnitude of the air flow from the inlet hole 2 toward the outlet hole 3 in the passage 4. When the airflow flowing through the passage 4 from the inlet hole 2 toward the outlet hole 3 is small, the rotational force in the B direction generated in the blade 6 by the airflow is small, and is given to the blade 6 by the weight of the weight 51. The amount by which the blade 6 is rotated in the B direction against the rotational force in the A direction is small. When the air flow flowing through the passage 4 from the inlet hole 2 toward the outlet hole 3 is large, the rotational force in the B direction generated in the blade 6 by the air flow is large, and is given to the blade 6 by the weight of the weight 51. The amount by which the blades 6 are rotated in the B direction against the rotational force in the A direction is large. Here, since the viscous resistance force by the one-way damper 61 is applied to the rotation of the blade 6 in the B direction, the blade 6 does not cause rapid rotation in the B direction, and also prevents the occurrence of halation and galloping. be able to. When no air flow is generated in the passage 4, the blade 6 is always urged in the A direction by the dead weight of the weight 51, and thus is disposed at the passage opening position. When the air flow gradually increases, the amount of rotation of the blades 6 in the B direction gradually increases, and when the air flow gradually decreases, the amount of rotation of the blades 6 in the B direction also gradually decreases. In this way, the ventilator 1 performs constant air volume control of the air flow by the above-described rotation of the blades 6.

  According to the ventilator 1 of the present example, the frame 5 having the passage 4 having the inlet hole 2 and the outlet hole 3 therein, and the air flow constantly flowing toward the passage opening position and flowing through the passage 4 And a blade 6 rotatably disposed in the frame 5 so as to close the passage 4 and a resistance that is connected to the blade 6 and that provides resistance to the blade 6 against the rotation of the blade 6. The blade 6 includes a shaft portion 31 rotatably supported by the frame body 5 and a pair of blade body portions 32 extending integrally from the shaft portion 31 in the radial direction. And the tip portions 34 and 35 of the blade main body portions 32 and 33 are curved so as to cause the blade 6 to generate a rotational moment toward the passage closed position by the air flow flowing through the passage 4. When the resistance applying means 9 is connected to the shaft portion 31 of the blade 6, And a damper (including the above-described viscous damper and friction damper) that generates resistance against at least one of the rotation of the blade 6 toward the passage opening position and the rotation of the blade 6 toward the passage closing position. For this reason, the blades 6 are not rapidly rotated, and the occurrence of halation and galloping can be prevented.

  According to the ventilation device 1, the urging means including the weight 51 provided on the blade 6 is further provided, and the blade 6 is always rotated so as to rotate toward the passage opening position by its own weight. Since it is biased, the constant air volume control of the air flow by the blades 6 can be performed more suitably. In order to always be urged toward the passage opening position, when the blade 6 is in the passage opening position, the blade body portion 33 side located below the shaft portion 31 of the pair of blade body portions 32 and 33. The weight of the blade body 6 may be heavier than the weight of the blade body portion 32 side positioned above the shaft portion 31 of the pair of blade body portions 32 and 33 when the blade 6 is in the passage opening position. As a means for making the weight on the blade body 33 side heavier than the weight on the blade body portion 32 side, for example, the center of gravity position of the blade 6 is closer to the blade body 33 side than the rotation axis of the blade 6. Means for decentering the shaft 31 of the blade 6, means for changing the shape of the blade body 33 so that the weight of the blade body 33 is heavier than the weight of the blade body 32, and a weight inside the blade body 33 There is a means to provide.

It is front explanatory drawing of the example of embodiment of this invention. FIG. 2 is a partially omitted plan explanatory view of the example shown in FIG. 1. (A) And (b) is sectional explanatory drawing which mainly showed the blade | wing of the example shown in FIG. (A) And (b) is the side explanatory drawing which mainly showed the weight of the example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ventilator 2 Inlet hole 3 Outlet hole 4 Passage 5 Frame body 6 Blade | wing 7 Energizing means 9 Resistance provision means

Claims (2)

A frame having a passage having an inlet hole and an outlet hole therein, and constantly energized toward the opening position of the passage, and rotatable in the frame body so as to close the passage based on an air flow flowing through the passage. A disposed blade, a resistance applying means that is connected to the blade and resists the rotation of the blade, and a biasing means that includes a weight provided on the blade. The blade includes a shaft portion that is rotatably supported by the frame body, and a pair of blade body portions that integrally extend in a radial direction from the shaft portion. The tip portion of the blade is curved so that a rotational moment toward the passage closing position is generated in the blade by the air flow flowing through the passage, and the resistance applying means is connected to the shaft portion of the blade and the passage opening position. It does not cause the resistance force against the rotation of the blade toward the Write, and comprises a one-way damper to produce a resistance force against the rotation of the blade toward the passage closed position, the weight is the passage opening position the wing by its own weight along with being mounted through a shaft to the shaft The urging means is configured to constantly urge the rotational force in the direction in which the wings move by changing the mounting position of the weight with respect to the shaft in the longitudinal direction of the shaft or by increasing or decreasing the number of weights. A ventilation device that can adjust the rotational force in the direction toward the passage opening position . When the vane is in the passage open position, the weight on the blade main body side located below the shaft portion of the pair of blade main bodies when the vane is in the passage open position is always open to the passage opening position. The ventilator according to claim 1, wherein the ventilator is heavier than the weight of the blade main body portion located above the shaft portion of the pair of blade main body portions when in the position.

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