JP2017219241A - Variable air volume device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable air volume device which can be installed in a passage while securing an inner diameter of the passage and inhibit increase of pressure loss.SOLUTION: A variable air volume device is installed in a ventilation flue and includes: a damper 11 which adjusts an opening area of an outlet of air flowing in the ventilation flue; a rotation guide 14 which rotatably holds the damper 11; a damper rotation driving part which is connected with the damper 11 and rotates the damper 11 to change an angle of the damper 11; and a base bracket 13 which holds the rotation guide 14 and the damper rotation driving part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a variable air volume device installed in an air-conditioning house in a whole building or a blowing unit of a central air conditioning system such as a building.

  As a technique for adjusting the air volume to be blown into the room, the variable air volume damper unit is detachably attached to the inside of the variable air volume blowing unit device connected to the duct outside the room, such as behind the ceiling or under the floor, and ventilating into the room. A casing provided with an opening connected to the air outlet to the room, a damper controller detachably attached to the inside of the casing from the opening, and an outlet unit (grill) detachably attached to the opening from the room side There is known an air volume variable blowout unit device comprising: (for example, Patent Document 1).

JP-A-4-45346

In order to install a damper, a conventional air volume variable blowout unit device is provided with a cylindrical receptacle that receives a blower duct on the outside of a casing, and a detachable duct is attached in the receptacle, and the damper is attached to the detachable duct. Was configured to store.
However, in the conventional configuration as described above, since the detachable duct is further installed in the cylindrical receptacle that receives the air duct, the inner diameter of the flow path is reduced by the amount of the detachable duct, and the pressure loss increases. There was a problem that the maximum air volume was also reduced.

  The present invention has been made to solve the above-described problems, and provides a variable air volume device that can be installed inside a flow path and can suppress an increase in pressure loss while securing the inner diameter of the flow path. For the purpose.

  The variable air volume device according to the present invention is installed in the ventilation path, and is connected to a damper that adjusts an opening area of the air flowing through the ventilation path, a rotation guide that rotatably holds the damper, and the damper. A damper rotation drive unit that rotates the damper to change the angle of the damper, a rotation guide, and a base bracket that holds the damper rotation drive unit are provided.

  According to this invention, it can install in a flow path, ensuring the internal diameter of a flow path, and can suppress the increase in pressure loss.

FIG. 1 is a diagram illustrating the configuration of a variable air volume device according to Embodiment 1 of the present invention, and FIG. 1A is a diagram illustrating a case where a damper is fully closed with respect to air flowing through a ventilation path. FIG. 1B is a diagram illustrating a case where the damper is fully opened with respect to the air flowing through the ventilation path. FIG. 3 is a diagram illustrating an example of a configuration of a motor that constitutes a rotation drive unit in the first embodiment. It is a figure explaining an example of the attachment method to the air conveyance path connection apparatus of the variable air volume apparatus which concerns on Embodiment 1 of this invention, Comprising: FIG. 3A is the air conveyance in which the variable air volume apparatus was provided in the air conveyance path FIG. 3B is a diagram for explaining a state immediately before being attached to the road connection device, and FIG. 3B is a diagram for explaining a state in which the variable air volume device is attached to the air conveyance path connection device provided in the air conveyance path. FIG. 4 is a view for explaining an example of a blowout unit that blows air adjusted by the variable airflow device 1 according to Embodiment 1 of the present invention into the room, and FIG. 4A is an external view of the blowout unit. FIG. 4B is a perspective view of the blower unit in which the variable airflow device is attached to the air conveyance path connecting device and the damper is fully opened, as viewed from the air conveyance path side. FIG. FIG. 4D is a perspective view of the blow-out unit attached to the road connecting device and in a fully opened state of the damper as seen from the air outlet side of the room. FIG. 4D is a state in which the variable air volume device is in the fully closed state in FIG. FIG.

Embodiment 1 FIG.
The variable air volume device 1 according to Embodiment 1 of the present invention is attached to a ventilation path connected to an air conveyance path such as a duct outside the room, such as behind the ceiling or under the floor, and is indoors via the ventilation path. Adjust the amount of air blown.

FIG. 1 is a diagram illustrating a configuration of a variable air volume device 1 according to Embodiment 1 of the present invention, and FIG. 1A is a diagram illustrating a case where a damper is fully closed with respect to air flowing through a ventilation path. FIG. 1B is a diagram illustrating a case where the damper is fully opened with respect to the air flowing through the ventilation path.
In the first embodiment, the damper fully closed state refers to a state in which the surface of the damper 11 is directed perpendicular to the air flow in the ventilation path, and the damper fully open state refers to the state of the damper 11. A state in which the surface is oriented horizontally with respect to the air flow in the ventilation path. In the first embodiment, the state in which the damper 11 is oriented perpendicularly to the air flow in the ventilation path includes a state in which the damper 11 is oriented substantially perpendicularly, and the damper 11 is disposed in the ventilation path. It is only necessary that the flowing air be directed to the extent that it is most disturbed in its structure and configuration. In the first embodiment, the state in which the damper 11 is oriented horizontally with respect to the air flow in the ventilation path includes a state in which the damper 11 is oriented substantially horizontally. It is only necessary that the air flowing inside is directed to the extent that the air flow is allowed to pass through the structure and configuration as much as possible without being obstructed as much as possible.

As shown in FIG. 1, the variable air volume device 1 is installed in a ventilation path, and includes a damper 11, a motor 12, a base bracket 13, a rotation guide portion 14, a link mechanism 15, and a connection portion 16. Prepare.
The damper 11 adjusts the blowout opening area of the air flowing through the ventilation path.
The motor 12 generates torque for rotating the damper 11.
One end of the link mechanism 15 is connected to a rotating shaft (see FIG. 2 described later) of the motor 12 installed through an opening (not shown) of the base bracket 13, and the rotating shaft of the motor 12 is centered. The other end is rotatably connected to the damper 11, and the damper 11 is driven to rotate by the torque generated by the motor 12. Specifically, the link mechanism 15 includes a link member 15a and a link member 15b. The link member 15a and the link member 15b are rotatably connected by a connecting shaft 15c as a sliding body, and the link members 15a and 15b. One end opposite to the connecting shaft 15c is rotatably connected to the rotating shaft of the motor 12 and the damper 11, respectively. Although not shown, the connecting shaft 15c is composed of a stepped screw (sliding on the outer peripheral portion of the step portion) or a collar (sliding on the outer peripheral portion of the collar) and a screw passing therethrough. The link members 15a and 15b are made of resin, but may be made of other materials such as metal.
Here, as described above, the link mechanism 15 includes the link member 15a and the link member 15b, and the link member 15a and the link member 15b are rotatably connected by the connecting shaft 15c. This is merely an example, and the link mechanism 15 has one end connected to the rotating shaft of the motor 12 and is held rotatably about the rotating shaft of the motor 12, and the other end can be turned to the damper 11. It is only necessary that the damper 11 is driven and rotated by the torque generated by the motor 12.

In the first embodiment, the motor 12 and the link mechanism 15 constitute a rotation drive unit.
Here, FIG. 2 is a diagram illustrating an example of the configuration of the motor 12 that constitutes the rotation drive unit in the first embodiment.
As shown in FIG. 2, in the first embodiment, the motor 12 is a geared stepping motor. As a result, the motor 12 can set the operating angle of the damper 11 only by the number of voltage pulses or current pulse inputs, and the torque for maintaining the rotational angle and the damper angle in the power-off (non-excited) state by the gear. Can be bigger.

The rotation guide portion 14 has a rotation axis substantially perpendicular to the air flow on the diameter of the damper 11 on the back surface of the damper 11, that is, on the surface of the damper 11 opposite to the surface facing the air flow. The damper 11 is rotatably held. The rotation guide portion 14 is formed by cutting and raising the base bracket 13, the guide member 14 b attached to the damper by screwing, spot welding, or the like, and a connection for connecting them slidably. It is comprised from the axis | shaft 14c. The rotation guide part 14 is not limited to this structure, and may be, for example, a general hinge or a hinge.
The base bracket 13 holds a rotation guide portion 14 that holds the damper 11 and a motor 12 that is connected to the link mechanism 15 and forms a rotation drive portion. In the first embodiment, the base bracket 13 is formed in an L shape. Thereby, the intensity | strength of the base bracket 13 can be strengthened and a deformation | transformation can be suppressed.
The base bracket 13 holds the damper 11 so that each surface of the base bracket 13 forming the L shape is orthogonal to the surface of the damper 11 in a fully closed state of the damper.

The connection portion (first connection portion) 16 is provided at an end portion in the longitudinal direction of the L-shaped base bracket 13. Here, as shown in FIG. 1A, the connection portion 16 is provided at two locations, and each of the end portions in the longitudinal direction of the base bracket 13 is part of the side opposite to the damper 11 in the fully closed state of the damper. The L-shaped base bracket 13 is provided upright at right angles to the main body. Specifically, when the base bracket 13 is formed, an uncut portion (not shown) having a certain height is provided at an end portion in the longitudinal direction of the base bracket 13, and the uncut portion is a damper. It is assumed that it is formed by bending to the 11 side at a right angle. Here, the right angle includes a substantially right angle. Here, it is assumed that the connection portion 16 has a screw hole.
In the first embodiment, the connection portion 16 provided at the end in the longitudinal direction of the surface on which the rotation guide portion 14 is held is referred to as a rotation guide side connection portion 16a, and the motor 12 of the base bracket 13 is The connecting portion 16 provided at the end in the longitudinal direction of the surface to be held is referred to as a motor side connecting portion 16b.
The connection part 16 is connected to two connection parts provided on the inner wall of the ventilation path. The connection part provided in the inner wall of a ventilation path and the connection method are mentioned later.
In addition, the formation method of the connection part 16 mentioned above is only an example, and the connection part 16 may be formed by other methods, and the connection part 16 is a connection part provided on the inner wall of the ventilation path. It only needs to be connected.

In the variable air volume device 1, the operation in which the rotation driving unit generates torque and rotationally drives the damper 11 is controlled by a control unit (not shown) that comprehensively controls the variable air volume device 1.
For example, when the damper 11 is in the fully closed state as shown in FIG. 1A and the motor 12 generates torque based on the control of the control unit, the link member 15a rotates clockwise in FIG. 1A around the rotation axis of the motor 12. Rotate in the direction. Accordingly, the link member 15b slidably connected to the link member 15a by the connecting shaft 15c is also pulled and rotated in the clockwise direction in FIG. 1A and connected to the other end of the link member 15b. The damper 11 held rotatably by the portion 14 can be rotated in the opening direction.

  Further, for example, when the damper 11 is in a fully open state as shown in FIG. 1B and the motor 12 generates torque based on the control of the control unit, the link member 15a is turned upside down in FIG. It rotates in the clockwise direction. Along with this, the link member 15b slidably connected to the link member 15a by the connecting shaft 15c is also pushed and rotated counterclockwise in FIG. 1B and connected to the other end of the link member 15b. The damper 11 held rotatably by the guide part 14 can be rotated in the closing direction.

  Thus, based on the control of the control unit, in the variable airflow device 1, the damper 11 can be rotated about 90 degrees from the damper fully closed state shown in FIG. 1A to the damper fully opened state shown in FIG. 1B. The variable air volume device 1 can maintain the angle by rotating the damper 11 to an appropriate position between the fully closed state and the fully open state.

In the conventional technology, a rotary shaft is provided in the diameter direction of the damper, and the damper is formed by extending the rotary shaft through a pipe such as a detachable duct located outside the outer periphery of the damper. A damper holding structure that can rotate freely. In addition, since the rotary shaft of the damper motor and the rotary gear are connected to each other by the meshing of the rotary gear on the outside of the tube such as the detachable duct, the damper can also be rotated 360 degrees as a drive mechanism. It was. However, the damper need only be able to rotate 90 degrees at the maximum in terms of the function of adjusting the air volume, and does not need to be rotated 360 degrees.
Therefore, in the variable airflow device 1 according to the first embodiment, as described above, the damper 11 can be rotated by 90 degrees, and the rotation guide portion 14 that holds the damper 11 rotatably is held by the base bracket 13. I made it.
In addition, the rotation drive unit that rotates the damper 11 may also have a structure that can rotate at least 90 degrees. Specifically, the motor 12 can be attached to the base bracket 13, and one end thereof is attached to the rotation shaft of the motor 12. Is connected, and the link mechanism 15 that rotates by the torque of the motor 12 is directly connected to the damper 11.
Thereby, the structure which rotationally couples the rotating shaft of a damper and the rotating shaft of a damper motor on the outer side of an attaching / detaching duct and a damper motor by the meshing of a rotating gear is made unnecessary.
As a result, since the detachable duct becomes unnecessary, the inner diameter of the flow path is not reduced by the amount of the detachable duct, the pressure loss is prevented from increasing, and the maximum air volume can also be reduced. Moreover, it is not necessary to arrange the rotation drive unit outside the ventilation path, and maintenance from the ventilation path can be performed.
In addition, since the link mechanism 15 is used for the connection between the motor 12 and the damper 11, it is possible to increase the tolerance and the degree of design freedom with respect to mounting displacement and the like.

Further, in the variable airflow device 1, the diameter of the damper 11 can be set as appropriate according to the diameter of the ventilation path. However, as shown in FIG. 1A, the damper 11 is perpendicular to the air flow in the ventilation path. In the fully closed state of the damper directed toward, a predetermined gap (h in FIG. 1A) is provided between the outer periphery of the damper 11 and the inner wall surface of the ventilation path.
The predetermined gap may be an interval that allows the necessary minimum ventilation airflow to flow between the outer periphery of the damper 11 and the inner wall surface of the ventilation path.
For example, in a cylindrical air conveyance path connecting device 21 (outside diameter of about φ148 mm, inner diameter of about φ146 mm, which is connected to a duct having an inner diameter of about φ150 mm. The air conveyance path connecting device 21 will be described later with reference to FIG. 3). The damper diameter is set to about φ140 mm. That is, the gap through which the necessary minimum ventilation airflow can flow between the outer periphery of the damper and the inner wall surface of the ventilation path is set to about 3 mm. The area of this gap is set to about 10% of the cross-sectional area of the ventilation path (inside the air conveyance path connecting device 21). The necessary minimum ventilation airflow determined in an airtight house or the like is, for example, about 10 m ³ / h in a room of 4 tatami mats (ceiling height 2.5 m). This gap also serves to prevent contact between the damper and the inner wall of the ventilation path due to a deviation in the installation of the damper or distortion of the ventilation path.
In this way, by providing a predetermined gap between the outer periphery of the damper 11 and the inner wall surface of the ventilation path, the minimum necessary determined by an airtight house or the like regardless of the state of the damper 11. Ventilation air volume can be secured.
Note that the above-described gap is not necessarily required, and a structure in which the air volume is almost zero when fully closed may be employed. For example, the damper shape may be an ellipse so as to be closed by contacting the inner wall of the ventilation path (not shown), or a protrusion along the inner wall of the ventilation path may be formed and pressed to close the damper (not shown). Not shown).

Next, a method for attaching the variable air volume device 1 described with reference to FIGS. 1A and 1B will be described using the air conveyance path connecting device 21 corresponding to the ventilation path in FIGS. 1A and 1B as an example.
FIG. 3 is a diagram for explaining an example of a method of attaching the variable air volume device 1 according to Embodiment 1 of the present invention to the air conveyance path connecting device 21. FIG. 3A shows the variable air volume device 1 carrying the air. FIG. 3B is a diagram illustrating a state immediately before being attached to the air conveyance path connecting device 21 connected to the road, and FIG. 3B is attached to the air conveyance path connecting device 21 in which the variable air volume device 1 is connected to the air conveyance path. It is a figure explaining a state.
In addition, an air conveyance path means here the ventilation path which conveys the air from an air conditioner, such as a duct.
A cylindrical air conveyance path connection device 21 that receives the air conveyance path is attached to an air conveyance path such as a duct, and the variable air volume device 1 is attached to the air conveyance path connection device 21.
As shown in FIG. 3A, a connecting portion 22 protruding toward the center is provided on the inner peripheral surface of the air conveyance path connecting device 21. Here, the connection part 22 shall have a screw hole, and shall be attached to the inner peripheral surface of the air conveyance path connection device 21 by screwing or the like.
The connection part (second connection part) 22 is connected to the air conveyance path connection device 21 so that the center of the inner periphery of the air conveyance path connection device 21 and the center of the damper 11 of the variable airflow device 1 are coaxial. In a state where the variable airflow device 1 is disposed so as to be opposed to each other, the rotation guide side connection portion 16a and the motor side connection portion 16b provided at the end portions in the longitudinal direction of the base bracket 13 of the variable airflow device 1 are respectively opposed to the rotation guide side connection portion 16b. Two places are provided.
Here, the connection portion 22 facing the rotation guide side connection portion 16a of the variable air volume device 1 is opposed to the rotation guide side connection portion 22a of the air conveyance path connection device 21 and the motor side connection portion 16b of the variable air volume device 1. The connecting portion 22 to be used is a motor side connecting portion 22b of the air conveyance path connecting device 21.

The variable air volume device 1 is configured so that the surface of the damper 11 on the air conveyance path side faces the air conveyance path connection device 21 and the rotation guide side connection portion 16a, the motor side connection portion 16b of the variable air volume device 1, and the air conveyance path. The connecting device 21 is detachably attached to the air conveyance path connecting device 21 by the rotation guide side connecting portion 22a and the motor side connecting portion 22b.
When the variable air volume device 1 is attached to the air conveyance path connection device 21, the position of the rotation guide side connection portion 22a of the air conveyance path connection device 21 and the rotation guide side connection portion 16a of the variable air volume device 1 are aligned, and the screw 31a. The spring washer 32a and the washer 33a are fitted to the spring washer 32a and the washer 33a in this order, and the screw 31a fitted with the spring washer 32a and the washer 33a is tightened from the variable airflow device 1 side to rotate the rotating guide side connecting portion 16a. It fixes to the moving guide side connection part 22a.
Further, the positions of the motor side connection portion 22b of the air conveyance path connection device 21 and the motor side connection portion 16b of the variable airflow device 1 are aligned, and the spring washer 32b and the washer 33b are fitted to the screw 31b in the order of the spring washer 32b and the washer 33b. Then, the screw 31b fitted with the spring washer 32b and the washer 33b is tightened from the variable airflow device 1 side to fix the motor side connection portion 16b to the motor side connection portion 22b.
Thereby, the variable air volume device 1 is attached to the air conveyance path connecting device 21.

As shown in FIG. 3B, when the variable air volume device 1 is attached to the air conveyance path connecting device 21, a part of the variable air volume device 1 is accommodated in the air conveyance path connecting device 21.
Specifically, the damper 11 and the rotation guide portion 14 of the variable airflow device 1, a part of the base bracket 13, a part of the motor 12, and a part of the link mechanism 15 are connected to the air conveyance path connection device 21. In order for the variable air volume device 1 to function, it is sufficient that at least the damper 11 is accommodated in the air conveyance path connecting device 21.
As described above, the cylindrical air conveyance path connecting device 21 is configured as a part for connecting to an air conveyance path such as a duct connected to the air conditioner and a ventilation path of the variable air volume device 1 that controls the air volume. The number of parts can be reduced when the damper 11 is attached because the part can also serve as a part and does not require a detachable duct or the like.

When removing the variable air volume device 1, the screws 31a and 31b may be loosened and removed.
Thus, the variable air volume device 1 can be easily attached to or detached from the air conveyance path connecting device 21 with two screws.

FIG. 4 is a diagram for explaining an example of the blowout unit 41 that blows air adjusted by the variable airflow device 1 according to Embodiment 1 of the present invention into the room.
4A is an external view of the blowout unit 41, and FIG. 4B is a perspective view of the blowout unit 41 in which the variable air volume device 1 is attached to the air conveyance path connecting device 21 and the damper is fully opened, as viewed from the air conveyance path side. FIG. 4C is a perspective view of the blowing unit 41 in which the variable airflow device 1 is attached to the air conveyance path connecting device 21 and the damper is fully opened, as viewed from the air outlet side of the room, FIG. 4D is a diagram showing the variable airflow device 1 in the fully closed state in FIG. 4C.

The blowout unit 41 is connected to a duct or the like outside the room, such as behind the ceiling or under the floor, and blows air adjusted by the variable airflow device 1 into the room.
As shown in FIG. 4A, the blowout unit 41 has an internal space surrounded by a partition wall, a first opening 42 formed in the wall, and a second opening 43. Here, the wall portion in which the first opening 42 is formed is also referred to as a first wall portion, and the wall portion in which the second opening 43 is formed is also referred to as a second wall portion.
A cylindrical air conveyance path connecting device 21 connected to the air conveyance path from the air conditioner is attached to the outside of the first wall portion by, for example, screwing or the like, and the first opening is This is an inlet for taking in air from the air conveyance path connecting device 21 into the blowout unit 41. As shown in FIGS. 4B to 4D, the inner periphery of the first opening 42 is made substantially the same as the inner periphery of the air conveyance path connecting device 21.
The second opening is a blowout port for blowing air into the room and a blowout port for sending air from the air conveyance path connecting device 21 into the room.
A grid-like grill 44 is detachably fitted in the second opening 43.

As shown in FIGS. 4B to 4D, the variable air volume device 1 can be accessed using the second opening 43. For example, when the variable air volume device 1 is maintained or replaced, an operator or the like However, it is possible to remove the grille 44 fitted in the second opening 43 and perform maintenance or replacement.
As described above, the variable air volume device 1 can be removed, attached, or maintained by using the second opening 43 that opens toward the room. For example, the variable air volume device can be installed on the ceiling or the like. It is not necessary to provide an inspection port for attaching and detaching 1 or maintenance, so that troublesome work for installing the inspection port is unnecessary, and the appearance of the ceiling or the like is not impaired, and the variable air volume device 1 can be easily removed and installed. Alternatively, maintenance can be performed.

  In addition, the opening direction of the damper 11 with respect to the 1st opening part 42 is not limited to what was shown by FIG. 4, You may arrange | position in any direction. Further, the first opening 42 is not limited to the one shown in FIG. 4, and any wall portion other than the second opening 43 of the blowout unit 41 is provided on any wall portion. Also good.

The arrangement of the variable air volume device 1 in the air flow direction in the air conveyance path connecting device 21 is not limited to that shown in FIG. 4 and may be arbitrarily determined. The position of the damper 11 in the air flow direction, that is, the distance from the fully closed surface of the damper 11 to the first opening 42 of the blowing unit 41 affects the characteristics of the opening degree and the air volume of the damper 11. In consideration of demands from the standpoint of maintenance and maintainability, it is set at a position where the appropriate performance is achieved. In order to further reduce the pressure loss, the components such as the motor 12, the link mechanism 15, and the base bracket 13 are preferably sized, shaped, and arranged so as not to be as resistant to air flow as possible. In order to reduce the pressure loss, it is preferable to dispose the nozzle 21 so as to protrude from the nozzle 21 into the blowing unit 41.
Further, the connecting portion 22 corresponding to the connecting portion 16 of the base bracket 13 may be installed in the blowout unit 41 instead of in the air conveyance path connecting device 21.

Inside the blowout unit 41, a rotation drive circuit (not shown) is connected and installed via a connector.
The control unit of the variable airflow device 1 gives the motor 12 a pulse voltage or a pulse current generated by the rotation drive unit circuit, and causes the motor 12 to generate torque.

In the above description, in the ventilation path and the air conveyance path connecting device 21, as shown in FIGS. 3 and 4, the cross section, that is, the surface on which the variable air volume device 1 is attached is circular, but this is not limitative. For example, an ellipse or a rectangle may be used.
Further, the damper 11 included in the variable air volume device 1 is not limited to a circle, and may be, for example, an ellipse, a rectangle, or the like according to the cross section of the ventilation path or the air conveyance path connection device 21.

  In the above description, the base bracket 13 is L-shaped. However, the present invention is not limited to this. For example, the base bracket 13 may be T-shaped, I-shaped, or the like. 11 or any other material that can hold the motor 12 or the like.

  Further, the base bracket 13 may be provided with a stopper for defining the fully open position or the fully closed position of the damper 11.

  In the above description, the air conveyance path is assumed to be a duct connected to an air conditioner installed in a machine room, for example. However, the air conveyance path is not limited to this, and the air conveyance path is sandwiched between the ceiling and the floor. What is necessary is just a thing which becomes a flow path which can convey air, such as the space between floors which is space, a space under a floor, and a hollow panel.

In the above description, the connection portions 16 and 22 are provided at two locations, and the variable air volume device 1 and the air conveyance path connection device 21 are fixed and connected at two locations. However, the connecting portions 16 and 22 may be provided at one place or three places, respectively.

  Further, as described above, in the variable air volume device 1 according to Embodiment 1 of the present invention, the rotating shaft of the damper and the rotating shaft of the damper motor are rotated by meshing the rotating gear on the outside of the attaching / detaching duct or the attaching / detaching duct. Since there is no need for a coupling structure, there is no need for a space for housing the detachable duct or the gear that meshes the rotating shaft of the damper and the rotating shaft of the damper motor outside the detachable duct. In comparison, the blowout unit 41 can be reduced in size. Further, for example, when the variable air volume device 1 is attached to the air conveyance path connecting device 21, there is no need to align the connecting portion between the motor 12 and the damper 11, and the handling complexity is reduced.

  Further, as described above, the variable air volume device 1 according to Embodiment 1 of the present invention is suitable for use in the blow-out unit 41, but is not limited to this, for example, the inside of a duct or the like, or the duct It may be installed in a branch box or the like and used for applications such as adjusting the air volume flowing through the duct or the like or the branch box of the duct with the variable air volume device 1.

  As described above, according to the first embodiment, the variable air volume device 1 includes the damper 11 that adjusts the blowout opening area of the air flowing in the ventilation path, and the rotation guide portion that rotatably holds the damper 11. 14 and a damper rotation drive unit that is connected to the damper 11 and rotates the damper 11 to change the angle of the damper 11, and the variable air volume device 1 is installed in the ventilation path. Parts such as a detachable duct are not required, the inner diameter of the flow path is ensured, and an increase in pressure loss can be suppressed.

  Further, the variable air volume device 1 is provided with a connection portion (first connection portion) 16 at an end portion in the longitudinal direction of the base bracket 13, and on the connection portion (first connection portion) 16 and the inner periphery of the ventilation path. Since the connecting portion (second connecting portion) 22 provided so as to face the connecting portion (first connecting portion) 16 is detachably attached to the ventilation path, the variable air volume device 1 can be easily provided. It can be made detachable.

  Moreover, since the base bracket 13 is L-shaped, the strength can be increased and deformation can be suppressed.

  Further, in the fully closed state in which the surface of the damper 11 is directed perpendicular to the air flow in the ventilation path, a set gap is provided between the outer periphery of the damper 11 and the inner wall surface of the ventilation path. Therefore, regardless of the state of the damper 11, it is possible to ensure the necessary minimum ventilation air volume determined in an airtight house or the like.

  Further, the ventilation path is a cylindrical air conveyance path connecting device 21 installed in the blowing unit 41, and the variable air volume device 1 is installed while being stored at least partially in the air conveyance path connecting apparatus 21, The cylindrical air conveyance path connecting device 21 can also serve as a component for connection with an air conveyance path such as a duct connected to an air conditioner and a component of the variable air volume device 1 that controls the air volume. Since the duct is not required, the number of parts for configuring the variable air volume device 1 can be reduced.

  Further, the variable air volume device 1 has a first space for taking in air from the internal space surrounded by the partition walls and the air conveyance path connecting device 21 formed on the first wall portion and attached to the first wall portion. In the blow-out unit 41 having an opening 42 and a second opening 43 formed in the second wall for sending air from the air conveyance path connection device 21 into the room, the air conveyance path connection device 21 so that the variable air volume device 1 can be attached, removed, or maintained using the second opening 43 that opens toward the room. For example, it is not necessary to provide an inspection port for attaching or detaching or maintaining the variable air volume device 1 on the ceiling, etc., and no troublesome work for installing the inspection port is required, and the appearance of the ceiling or the like is easily impaired. Variable wind Mounting of the device 1, removal or, it is possible to perform the maintenance.

  Further, the damper rotation drive unit is configured to generate torque by the torque generated by the motor 12 and one end connected to the rotation shaft of the motor 12 and the other end rotatably connected to the damper 11. Since the damper 11 is configured to include the link mechanism 15 that rotationally drives, it is possible to increase the tolerance and the degree of freedom of design in connection between the motor 12 and the damper 11.

  Further, since the motor 12 is a stepping motor with a gear, the operating angle of the damper 11 can be set only by the number of voltage pulse or current pulse inputs, and the rotational torque and the power off (no excitation) state can be set by the gear. The torque that maintains the damper angle can be increased.

  In the present invention, any constituent element of the embodiment can be modified or any constituent element of the embodiment can be omitted within the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Variable air volume apparatus 11 Damper 12 Motor 13 Base bracket 14 Rotation guide part 14a, 14b Guide member 14c Connection shaft 15 Link mechanism 15a, 15b Link member 15c Connection shaft 16 1st connection part 16a, 22a Rotation guide side connection part 16b, 22b Motor side connection part 21 Air conveyance path connection device 22 2nd connection part 31a, 31b Screw 32a, 32b Spring washer 33a, 33b Washer 41 Blowout unit 42 1st opening part 43 2nd opening part 44 Grill

Claims (8)

Installed in the ventilation path,
A damper for adjusting a blowout opening area of air flowing in the ventilation path;
A rotation guide for rotatably holding the damper;
A damper rotation drive unit connected to the damper and rotating the damper to change the angle of the damper;
A variable air volume device comprising: the rotation guide; and a base bracket that holds the damper rotation drive unit. A first connection portion is provided at a longitudinal end portion of the base bracket,
The first connection part and a second connection part provided on the inner periphery of the ventilation path so as to face the first connection part are detachably attached to the ventilation path. The variable air volume device according to claim 1. The variable air volume device according to claim 1 or 2, wherein the base bracket is L-shaped. In the fully closed state in which the surface of the damper is directed perpendicular to the air flow in the ventilation path, a set gap is provided between the outer periphery of the damper and the inner wall surface of the ventilation path. The variable air volume device according to any one of claims 1 to 3, wherein: The ventilation path is a cylindrical air conveyance path connecting device installed in the blowing unit,
The variable airflow device according to any one of claims 1 to 4, wherein at least a part of the airflow path connecting device is housed and installed. An internal space surrounded by a partition, a first opening for taking in air from the air conveyance path connecting device formed on the first wall and attached to the first wall, and a second In a blow-out unit having a second opening for sending air from the air conveyance path connecting device to the room formed in a wall, the air conveyance path connecting device is housed and installed. The variable air volume device according to claim 5. The damper rotation drive unit is
A motor,
One end is connected to the rotation shaft of the motor, the other end is rotatably connected to the damper, and the link mechanism is configured to rotate the damper by torque generated by the motor. The variable air volume device according to any one of claims 1 to 6. The variable air volume device according to claim 7, wherein the motor is a geared stepping motor.

Images