JP2020056519A - Flap for ventilation device and ventilation device - Google Patents

Abstract

To provide a flap for a ventilation device which enables reduction of passage resistance in a duct and reduction of noise, and to provide the ventilation device.SOLUTION: A flap for a ventilation device includes: a plate-shaped flap body 20 in which a pair of plate surfaces are oriented in a first direction; and a rotation support part which is disposed on a rotation center axis extending in a second direction being orthogonal to the first direction and connected to the flap body. The flap body 20 has: a first plate surface 21 being oriented to the one side in the first direction, of the pair of plate surfaces; and a second plate surface 22 being oriented to the other side in the first direction, of the pair of plate surfaces. The first plate surface 21 has a recessed curve surface part 21b which is recessed from the first plate surface 21 to the other side in the first direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a flap for a ventilation device and a ventilation device.

  Ventilation flaps are known which are arranged in ventilation ducts. The ventilation device of Patent Literature 1 includes a flat flap.

JP-A-2006-212785

  The conventional ventilator flap has room for improvement in reducing the flow path resistance in the duct. If the flow resistance in the duct can be reduced, the load on the motor that drives the fan can be reduced, and the noise can be reduced.

  In view of the above circumstances, an object of the present invention is to provide a flap for a ventilation device and a ventilation device that can reduce noise by reducing flow path resistance in a duct.

  One aspect of the flap for a ventilation device of the present invention is arranged on a plate-like flap main body having a pair of plate surfaces facing a first direction, and a rotation center axis extending in a second direction orthogonal to the first direction. A rotation support portion connected to the flap main body, wherein the flap main body includes a first plate surface facing one side in a first direction, of the pair of plate surfaces, and a first plate surface of the pair of plate surfaces. , A second plate surface facing the other side in the first direction, and the first plate surface has a concave curved portion depressed from the first plate surface to the other side in the first direction.

  One aspect of the ventilation device of the present invention includes a fan around a fan shaft, a motor that drives the fan, a shroud that houses the fan, a duct connected to the shroud, And the flap for a ventilation device described above, which closes a flow passage in the duct so as to be openable and closable, and the first plate surface faces the shroud side in a flow direction of the duct.

  ADVANTAGE OF THE INVENTION According to the flap for ventilation apparatuses of one aspect of this invention, and a ventilation apparatus, the flow path resistance in a duct can be reduced and noise can be reduced.

FIG. 1 is a side view schematically illustrating the ventilation device of the present embodiment, and illustration of a fan is omitted. FIG. 2 is a bottom view schematically illustrating the ventilation device of the present embodiment. FIG. 3 is a perspective view showing the flap for a ventilation device of the present embodiment. FIG. 4 is a plan view showing the flap for a ventilation device of the present embodiment. FIG. 5 is a sectional view showing a VV section of FIG. FIG. 6 is a cross-sectional view showing a VI-VI cross section of FIG. FIG. 7 is a plan view showing a flap for a ventilation device according to a modification of the present embodiment.

  A ventilation device 1 and a flap 10 for a ventilation device according to an embodiment of the present invention will be described with reference to the drawings. The ventilation device 1 of the present embodiment is, for example, a ventilation device installed in a bathroom or the like.

  As shown in FIGS. 1 and 2, the ventilation device 1 includes a fan 2, a motor 3, a shroud 4, a duct 5, and a flap 10 for a ventilation device. The fan 2 is centered on the fan axis A. The fan shaft A extends in the vertical direction. The fan 2 is, for example, a sirocco fan. The motor 3 drives the fan 2. The motor 3 rotates the fan 2 around the fan axis A. The shroud 4 houses the fan 2.

  The duct 5 is connected to the shroud 4. The duct 5 is cylindrical. The duct 5 extends in the horizontal direction. The duct 5 has a wind channel inside. The flow path extends along the direction in which the duct 5 extends. That is, the flow path extends in the horizontal direction. In the following description, the direction in which the air flows inside the duct 5 is referred to as the flow direction of the duct 5 or simply the flow direction.

  The ventilation device flap 10 is arranged in the duct 5 and closes the flow path in the duct 5 so as to be openable and closable. The ventilator flap 10 is turned around the turning center axis J by the pressure of the wind sent from the fan 2 into the duct 5, and is opened. When the pressure of the wind becomes equal to or less than a predetermined value, the wind is rotated around the rotation center axis J by its own weight, returns to the original position, and is closed.

  As shown in FIG. 1, when the ventilation device flap 10 is viewed from the direction of the flow path of the duct 5, the rotation center axis J is inclined upward in the vertical direction as the rotation center axis J is separated from the fan axis A in the horizontal direction. It has a portion extending. In this portion, the ventilation device flap 10 rotates around the rotation center axis J. When the flap 10 for a ventilation device rotates by receiving wind pressure and is opened, the flow of wind in the direction of the flow path in the duct 5 is allowed, and exhaust is performed to the outside of the device through the duct 5. Further, by closing the ventilator flap 10, the outside air enters the shroud 4 through the duct 5, that is, the backflow of the wind is suppressed.

  The ventilation device flap 10 is made of, for example, sheet metal. However, the invention is not limited thereto, and the ventilation device flap 10 may be made of resin or the like. As shown in FIGS. 3 to 6, the ventilation device flap 10 includes a plate-shaped flap main body 20, a rotation support portion 30, a flange portion 40, and a rib portion 50.

  3 to 6, an XYZ coordinate system is shown as a three-dimensional orthogonal coordinate system as appropriate. In the flap body 20, a pair of plate faces face in the first direction. In the present embodiment, the first direction is a direction parallel to the Z-axis direction. One of the pair of plate surfaces of the flap body 20 is a first plate surface 21, and the other plate surface is a second plate surface 22. That is, the flap main body 20 has the first plate surface 21 and the second plate surface 22. In the present embodiment, of the first directions, the direction in which the first plate surface 21 faces is referred to as a first direction one side (−Z side), and the direction in which the second plate surface 22 faces is the first direction other side (+ Z side). ).

  The rotation center axis J extends in a direction orthogonal to the first direction. The direction in which the rotation center axis J extends is referred to as a second direction. In the present embodiment, the second direction is a direction parallel to the X-axis direction. Further, a direction orthogonal to the first direction and the second direction is referred to as a third direction. In the present embodiment, the third direction is a direction parallel to the Y-axis direction. As shown in FIG. 4, when the flap body 20 is viewed from the first direction, that is, in a plan view of the flap body 20, the position of the rotation center axis J in the third direction is different from the position of the center C of the flap body 20. . In the present embodiment, the direction from the rotation center axis J toward the center C of the flap body 20 in the third direction is referred to as one side (+ Y side) in the third direction, and the rotation direction from the center C of the flap body 20 to the rotation center axis. The direction toward J is referred to as the third direction other side (−Y side).

  Here, as shown in FIGS. 1 and 2, in a state in which the flap 10 for a ventilator is mounted in the duct 5 (closed state), one side (+ Y side) of the flap 10 for a ventilator in the third direction is: This is a direction away from the fan axis A obliquely downward, and the other side (−Y side) in the third direction is a direction approaching obliquely upward toward the fan axis A. Since the wind sent from the fan 2 to the duct 5 flows along the wall 4a of the shroud 4 due to centrifugal force, the flow velocity of the wind flowing in the duct 5 tends to increase as the distance from the fan axis A increases. For this reason, in the ventilation device flap 10, the flow velocity of the wind at the end of the flap main body 20 on one side in the third direction is higher than, for example, the center C of the flap main body 20. Further, in the flap 10 for a ventilation device, the wind pressure received at the end of the flap main body 20 on one side in the third direction is larger than, for example, the center C of the flap main body 20. When the ventilation device flap 10 is in the closed state, the first plate surface 21 of the flap main body 20 faces the shroud 4 side in the flow path direction of the duct 5. The second plate surface 22 of the flap body 20 faces the side opposite to the shroud 4 in the flow direction of the duct 5.

  As shown in FIGS. 3 to 6, the flap main body 20 is substantially circular in plan view. The flap body 20 has a constant plate thickness over the entire area of the flap body 20. The flap body 20 has a plane-symmetric shape with respect to a virtual plane VP that passes through the center of the flap body 20 in the second direction and is perpendicular to the second direction. In the present embodiment, the ventilation device flap 10 has a shape that is plane-symmetrical with respect to the virtual plane VP as a whole. According to the present embodiment, for example, in FIG. 1, the position of the duct 5 connected to the shroud 4 becomes a plane-symmetric position with respect to the fan axis A, and accordingly, the mounting direction of the ventilation device flap 10 in the duct 5. However, even when the direction is changed to a plane-symmetric direction about the fan axis A in FIG. 1, the operation and effect described later according to the present embodiment can be stably obtained.

  The flap main body 20 has a flat plate portion 23 and a curved plate portion 24. The flat plate portion 23 extends along a reference plane RP perpendicular to the first direction. The flat plate portion 23 extends along the outer peripheral portion of the flap body 20. When the flap body 20 is viewed from the first direction, the flat plate portion 23 is substantially U-shaped. The flat plate portion 23 is disposed at a portion of the outer peripheral portion of the flap main body 20 other than an end portion on one side (+ Y side) in the third direction.

  The curved plate portion 24 is curved toward the other side (+ Z side) in the first direction with respect to the reference plane RP. One end of the curved plate portion 24 on one side in the third direction is disposed on the outer peripheral portion of the flap body 20. When the flap body 20 is viewed from the first direction, the curved plate portion 24 is surrounded by the flat plate portion 23 from both sides in the second direction and the other side (−Y side) in the third direction.

  The first plate surface 21 has a portion arranged on the flat plate portion 23 and a portion arranged on the curved plate portion 24. The first plate surface 21 has a flat surface portion 21a and a concave curved surface portion 21b. The flat portion 21a may be referred to as the first flat portion 21a. The flat part 21 a is arranged on the flat part 23. The flat portion 21a is a flat surface extending along the reference plane RP. In this embodiment, when the flap main body 20 is viewed from the first direction, the flat portion 21a is substantially U-shaped.

  The concave curved surface portion 21b is arranged on the curved plate portion 24. The concave curved surface portion 21b has a concave curved surface shape and is constituted by one or a plurality of curved surfaces (concave curved surfaces). The concave curved surface portion 21b is recessed from the first plate surface 21 to the other side (+ Z side) in the first direction. Specifically, the concave curved surface portion 21b is recessed from the flat surface portion 21a to the other side in the first direction. The concave curved surface portion 21b is depressed to the other side in the first direction from the reference surface RP where the flat surface portion 21a is located.

  According to the present embodiment, since the concave curved surface portion 21b of the flap main body 20 is formed of a curved surface, turbulence does not easily occur in the wind flowing on the concave curved surface portion 21b, and the flow path resistance in the duct 5 is suppressed. Further, the concave curved surface portion 21b has a larger surface area and is more concave than the case where the concave curved surface portion 21b is formed of a single plane, so that it is easy to hold the wind. For this reason, the wind sent from the fan 2 into the duct 5 presses the concave curved surface portion 21b, thereby turning the flap 10 for a ventilation device with a small wind pressure, and can be stably opened. Thereby, the flow path resistance in the duct 5 is reduced, the number of rotations of the motor 3 for driving the fan 2 can be suppressed low, the load can be reduced, and the noise can be reduced. Further, since the ventilator flap 10 can be opened with a small wind pressure, for example, it is also possible to increase the cross-sectional area (that is, the opening area) of the flow path in the duct 5 and improve the ventilation efficiency.

  Further, in the present embodiment, since the flap body 20 has a constant plate thickness over the entire area of the flap body 20, it is possible to suppress the increase in the weight of the flap body 20 as a whole while providing the flap body 20 with the concave curved surface portion 21b. Thereby, the ventilation device flap 10 can be easily opened in the duct 5. Further, the flap body 20 can be easily manufactured by press working or the like.

  The length of the concave curved surface portion 21b in the second direction, that is, the width dimension in the second direction, increases in the third direction as the distance from the rotation support portion 30 increases. More specifically, the width dimension of the concave curved surface portion 21b in the second direction increases from the end on the other side (−Y side) in the third direction toward one side (+ Y side) in the third direction. According to the present embodiment, as the concave curved surface portion 21b becomes more susceptible to wind as it moves away from the rotation support portion 30 in the third direction, the ventilation device flap 10 provided in the duct 5 can be more easily operable with a small wind pressure. Easy to open.

  The depth of the concave curved surface portion 21b from the first plate surface 21 toward the other side in the first direction (+ Z side) increases from both ends of the concave curved surface portion 21b in the second direction toward the center. More specifically, the depth of the concave curved surface portion 21b from the flat portion 21a toward the other side in the first direction increases from both ends in the second direction toward the center portion side of the concave curved surface portion 21b. As the concave curved surface portion 21b moves from both ends in the second direction of the concave curved surface portion 21b toward the center, the depth of the concave surface portion 21b from the reference plane RP where the flat surface portion 21a is located toward the other side in the first direction increases. According to the present embodiment, the wind flowing on the concave curved surface portion 21b is guided from both ends in the second direction toward the center. Therefore, it is difficult for the wind to escape to the outside of the concave curved surface portion 21b, and the flow of the wind is stably held on the concave curved surface portion 21b. Therefore, the ventilator flap 10 is more easily opened.

  The concave curved surface portion 21b has a wind receiving portion 21c and a wind guiding portion 21d. The wind receiving portion 21c is disposed at one end in the third direction on the concave curved surface portion 21b. The wind receiving portion 21c is disposed farthest from the rotation support portion 30 in the third direction. The wind guide section 21d is disposed between the rotation support section 30 and the wind receiving section 21c in the third direction.

  As shown in FIG. 5, the amount of displacement of the wind receiving portion 21c in the first direction per unit length along the third direction (that is, the inclination with respect to the third direction) is a unit of the wind guide portion 21d along the third direction. It is smaller than the displacement amount in the first direction per length. That is, in the third direction, the inclination of the wind receiving portion 21c with respect to the reference surface RP is smaller than the inclination of the wind guide portion 21d with respect to the reference surface RP. Specifically, the inclination of the concave curved surface portion 21b with respect to the third direction gradually decreases from the end on the other side in the third direction toward one side in the third direction.

  According to the present embodiment, the wind receiving portion 21c can receive the wind more easily than the wind guiding portion 21d, and the flap 10 for the ventilation device can be more easily opened. That is, since the wind receiving portion 21c is located at one end in the third direction in the concave curved surface portion 21b, the inclination of the wind receiving portion 21c is reduced to make it easier to apply wind pressure, and the wind receiving portion 21c is rotated around the rotation center axis J. By increasing the moment, the ventilator flap 10 can be more easily opened. In addition, thereby, the open state of the ventilator flap 10 is favorably maintained. In addition, since the wind guide 21d guides the flow of the wind toward the wind receiving portion 21c, a larger wind pressure easily acts on the wind receiving portion 21c, and the above-described effects are particularly distinguished.

  The second plate surface 22 has a portion arranged on the flat plate portion 23 and a portion arranged on the curved plate portion 24. The second plate surface 22 has a flat surface portion 22a and a convex curved surface portion 22b. The flat portion 22a may be referred to as a second flat portion 22a. The flat part 22 a is arranged on the flat part 23. The flat portion 22a is a flat shape extending in parallel with the reference plane RP. In this embodiment, when the flap main body 20 is viewed from the first direction, the flat portion 22a is substantially U-shaped.

  The convex curved surface portion 22b is disposed on the curved plate portion 24. The convex curved surface portion 22b has a convex curved surface shape and is constituted by one or a plurality of curved surfaces (convex curved surfaces). The convex curved surface portion 22b protrudes from the second plate surface 22 to the other side (+ Z side) in the first direction. Specifically, the convex curved surface portion 22b protrudes from the flat surface portion 22a to the other side in the first direction. The convex curved surface portion 22b protrudes from the reference surface RP (not shown) where the flat surface portion 22a is located to the other side in the first direction.

  A plurality of rotation support portions 30 are provided. In the present embodiment, a pair of the rotation support portions 30 are provided at intervals in the second direction. However, the invention is not limited to this, and only one rotation support portion 30 may be provided. In this case, the rotation support portion 30 has a cylindrical shape or the like extending in the second direction. The rotation support section 30 is disposed on the rotation center axis J. In the present embodiment, the rotation support portion 30 has a plate shape. The pair of plate surfaces of the rotation support portion 30 face the second direction. The rotation support portion 30 has a pin insertion hole 30a that passes through the rotation support portion 30 in the second direction. The center axis of the pin insertion hole 30a is arranged coaxially with the rotation center axis J. A pin (not shown) provided in the duct 5 is inserted into the pin insertion hole 30a.

  The rotation support section 30 is connected to the flap body 20. The rotation support portion 30 extends from the flap body 20 toward the other side in the first direction. The rotation support section 30 is connected to the flat plate section 23. According to the present embodiment, since the rotation support portion 30 is connected to the flat plate portion 23, the rotation support portion 30 has the rotation center as compared with the case where the rotation support portion 30 is connected to the curved plate portion 24. It is more stably arranged on the axis J. Further, it is easy to make the center axis of the pin insertion hole 30a coincide with the rotation center axis J.

  The flange 40 is connected to an end of the flap body 20 in the second direction, protrudes from the flap body 20 in the first direction, and extends in the third direction. The flange 40 has a plate shape. The pair of plate surfaces of the flange 40 face the second direction. A pair of flanges 40 are provided at both ends of the flap body 20 in the second direction. Specifically, the flange portion 40 is connected to the flat plate portion 23 and protrudes from one end in the second direction of the flat plate portion 23 toward one side in the first direction. According to the present embodiment, the rigidity of the flap body 20 can be increased by the flange portion 40, and the deformation of the flap body 20 can be suppressed. In addition, since the flange portion 40 protrudes from the end of the flap body 20 in the second direction toward one side in the first direction, the flange portion 40 also has a function of guiding wind toward the concave curved surface portion 21b. Further, since the flange portion 40 is connected to the flat plate portion 23, it is possible to suppress the occurrence of distortion and the like when the flap main body 20 is manufactured, as compared with the case where the flange portion 40 is connected to the curved plate portion 24.

  The rib portion 50 is disposed on the second plate surface 22 of the flap body 20 and extends in the second direction. The rib portion 50 protrudes from the second plate surface 22 toward the other side in the first direction. The rib portion 50 extends over substantially the entire length of the flap body 20 in the second direction. The rib portion 50 extends over the flat surface portion 22a and the convex curved surface portion 22b. A plurality of rib portions 50 are provided. The plurality of rib portions 50 are arranged at an interval from each other in the third direction. According to the present embodiment, the rigidity of the flap main body 20 can be increased by the rib portions 50 while keeping the plate thickness of the flap main body 20 small. Further, since the rib portion 50 is disposed on the second plate surface 22, the rib portion 50 is unlikely to be a resistance to wind flowing on the first plate surface 21. Further, as in the modification shown in FIG. 7, the rib portion 50 may be arranged on the second plate surface 22 of the flap body 20 and extend in the third direction. The plurality of rib portions 50 are arranged at intervals in the second direction. In this case, the rib portion 50 does not easily become a resistance to wind flowing on the second plate surface 22.

  Note that the present invention is not limited to the above-described embodiment. For example, as described below, a configuration change or the like can be made without departing from the spirit of the present invention.

  In the above-described embodiment, the example in which the plate thickness of the flap main body 20 is constant over the entire area of the flap main body 20 has been described. However, the present invention is not limited thereto. For example, when the weight of the flap body 20 can be reduced to a predetermined value or less by selecting the material and the like of the flap body 20, the entire second plate surface 22 is provided while the concave curved surface portion 21b is provided on the first plate surface 21. It may be flat.

  In addition, the components (components) described in the above-described embodiments, modifications, and the like may be combined without departing from the spirit of the present invention. Changes are possible. The present invention is not limited by the above-described embodiments, but is limited only by the scope of the claims.

  DESCRIPTION OF SYMBOLS 1 ... ventilation apparatus, 2 ... fan, 3 ... motor, 4 ... shroud, 5 ... duct, 10 ... flap for ventilation apparatus, 20 ... flap body, 21 ... 1st plate surface, 21b ... concave curved surface part, 21c ... wind receiver Part, 21d ... wind guide part, 22 ... second plate surface, 23 ... flat plate part, 24 ... curved plate part, 30 ... rotation support part, 40 ... flange part, 50 ... rib part, A ... fan shaft, J ... Rotation center axis, RP: Reference plane, VP: Virtual plane

Claims (12)

A plate-like flap body having a pair of plate faces oriented in the first direction;
A rotation support portion disposed on a rotation center axis extending in a second direction orthogonal to the first direction and connected to the flap main body.
The flap body,
A first plate surface facing one side in a first direction of the pair of plate surfaces;
And a second plate surface facing the other side in the first direction among the pair of plate surfaces,
The flap for a ventilator, wherein the first plate surface has a concave curved surface portion depressed on the other side in the first direction from the first plate surface. The flap for a ventilation device according to claim 1,
The concave curved surface portion,
A wind receiving portion disposed farthest from the rotation support portion in a third direction orthogonal to the first direction and the second direction;
A wind guide portion disposed between the rotation support portion and the wind receiving portion in the third direction;
The amount of displacement of the wind receiver in the first direction per unit length along the third direction is equal to the amount of displacement of the wind guide in the first direction per unit length along the third direction. Smaller flap for ventilation equipment. A flap for a ventilation device according to claim 1 or 2,
The flap for a ventilation device, wherein the concave curved surface portion has a width dimension in the second direction that increases in a third direction orthogonal to the first direction and the second direction as the distance from the rotation support portion increases. A flap for a ventilation device according to any one of claims 1 to 3,
For the ventilation device, the concave curved surface portion has a greater depth from the first plate surface toward the other side in the first direction as it goes from both ends of the concave curved surface portion in the second direction toward the center. flap. A flap for a ventilation device according to any one of claims 1 to 4,
A ventilation device connected to an end of the flap body in the second direction, protruding from the flap body in the first direction, and having a flange portion extending in a third direction orthogonal to the first direction and the second direction; Flap. A flap for a ventilator according to any one of claims 1 to 5,
The flap for a ventilator, wherein the flap body has a shape that is plane-symmetric with respect to a virtual plane passing through the center of the flap body in the second direction and perpendicular to the second direction. A flap for a ventilation device according to any one of claims 1 to 6,
The flap for a ventilator, wherein the flap body has a constant plate thickness over the entire area of the flap body. A flap for a ventilator according to any one of claims 1 to 7,
A flap for a ventilator, comprising: a rib portion disposed on the second plate surface of the flap body and extending in the second direction. It is a flap for ventilators according to claim 8,
A plurality of the rib portions are provided,
The ventilation device flap, wherein the plurality of rib portions are arranged at intervals in a third direction orthogonal to the first direction and the second direction. A flap for a ventilator according to any one of claims 1 to 9,
The flap body,
A flat plate portion extending along a reference plane perpendicular to the first direction;
A curved plate portion curved toward the other side in the first direction with respect to the reference surface,
The rotation support portion is connected to the flat plate portion,
A flap for a ventilation device, wherein the concave curved surface portion is disposed on the curved plate portion. A fan around the fan axis,
A motor for driving the fan;
A shroud containing the fan;
A duct connected to the shroud,
The flap for a ventilation device according to any one of claims 1 to 10, which is disposed in the duct, and closes a flow passage in the duct so as to be able to open and close.
The ventilation device, wherein the first plate surface faces the shroud side in the flow path direction of the duct. The ventilation device according to claim 11,
The fan shaft extends in a vertical direction,
The duct extends horizontally,
Viewing the ventilation device flap from the flow path direction of the duct,
The ventilator, wherein the rotation center axis has a portion that extends obliquely upward in the vertical direction as the horizontal axis moves away from the fan axis in the horizontal direction.

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