JP2017227375A - Variable air amount device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable air amount device which can be installed inside a flow passage while securing an internal diameter of the flow passage and which can suppress increase in pressure loss.SOLUTION: In a ventilation flue, a variable air amount device includes: a damper 11 for adjusting a blowout opening area of the air flowing inside the ventilation flue; a first damper rotation shaft 14a provided at one end in a rotating axis direction of the damper 11, and for holding the damper 11 rotatably by being held in contact by protruding at a predetermined position on an inside wall of the ventilation flue; a second damper rotation shaft 14b provided at the other end in the rotating axis direction of the damper 11, and for holding the damper 11 rotatably by being held in contact by protruding at a predetermined position on the inner wall in the ventilation flue; a damper rotation drive part connected to the damper 11 and for changing an angle of the damper 11 by rotating the damper 11; and a damper rotation drive part holding bracket 13 for holding the damper rotation drive 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 provided at one end in the rotational axis direction of the damper that adjusts the blowout opening area of the air flowing in the ventilation path, and protrudes to a predetermined position on the inner wall of the ventilation path. By being held in contact with each other, the first damper rotation shaft that rotatably holds the damper and the other end in the rotation axis direction of the damper are provided and protruded to a predetermined position on the inner wall of the ventilation path. The second damper rotation shaft that holds the damper rotatably by being held, the damper rotation drive unit that is connected to the damper and rotates the damper to change the angle of the damper, and the damper rotation A damper rotation drive unit holding bracket for holding the drive unit is provided in the ventilation path.

  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 configures a damper rotation driving unit in the first embodiment. FIG. 3 is a diagram for explaining details of a damper rotation shaft in the first embodiment, and FIG. 3A is a diagram in a case where a first damper rotation shaft and a second damper rotation shaft are integrally formed in a rod shape. FIG. 3B is a diagram in the case where a first damper rotation shaft and a second damper rotation shaft are individually provided at both ends in the diameter (rotation axis) direction of the damper. In Embodiment 1, it is an enlarged view of the expansion-contraction part which a 1st damper rotation axis | shaft has, FIG. 4A shows the initial state before a 1st axial part is pushed into a 2nd axial part, FIG. 4B These are figures which show the state by which the 1st axial part was pushed into the 2nd axial part by applying force against the elasticity of a spring. 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. 5A is the air conveyance by which a variable air volume apparatus is connected to an air conveyance path FIG. 5B is a diagram illustrating a state in which the variable airflow device is attached to the air conveyance path connection device connected to the air conveyance path. In Embodiment 1, it is a figure explaining an example of the bearing part provided in an air conveyance path connection apparatus. It is a figure for demonstrating an example of the blowing unit which ventilates the air which the variable airflow apparatus which concerns on Embodiment 1 of this invention adjusted indoors, Comprising: FIG. 7A is an external view of a blowing unit, FIG. FIG. 7C is a perspective view of the blowout unit in which the variable air volume 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. 7D is a perspective view of the blow-out unit in the fully opened state as viewed from the air outlet side of the room, and FIG. 7D is a diagram in which the variable airflow device is fully closed in FIG. 7C. It is a figure explaining an example of the composition which was not provided with a crevice between the perimeter of a damper, and the inner wall surface of a ventilation way in a ventilation way in a damper fully closed state. It is a figure explaining another example of the structure which was not provided between the outer periphery of a damper and the inner wall face of a ventilation path in a ventilation path in a damper fully closed state.

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 conveyed by the air conveyance path. Adjust the amount of air blown into the room through the ventilation path.

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 be 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 damper rotation drive unit holding bracket 13, a damper rotation shaft 14, and a link mechanism 15. 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 damper rotation driving unit holding bracket 13. 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 on the opposite side of the connecting shaft 15c is rotatably connected to the rotating shaft of the motor 12 and the damper 11, for example, by screws. 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.

  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 damper rotation driving unit.
Here, FIG. 2 is a diagram for explaining an example of the configuration of the motor 12 constituting the damper rotation drive unit in the first embodiment.
As shown in FIG. 2, in the first embodiment, the motor 12 is a geared stepping motor. Thereby, the motor 12 can set the operating angle of the damper 11 only by the number of voltage pulses or current pulses input, and the rotation torque and the torque for maintaining the damper angle in the power-off (non-excitation) state are increased by the gear. can do.

The damper rotation drive unit holding bracket 13 is connected to the link mechanism 15 and holds the motor 12 constituting the damper rotation drive unit. In the first embodiment, the damper rotation driving unit holding bracket 13 is formed in a flat plate shape.
The damper rotation driving unit holding bracket 13 is provided so that the flat plate-like surface is orthogonal to the surface of the damper 11 in the damper fully closed state. Here, the term “orthogonal” includes substantially orthogonal.

The damper rotation shafts 14 are made of extendable members and are respectively provided at both ends in the diameter direction of the damper 11 that are orthogonal to the flow path of the air flowing in the ventilation path. In the first embodiment, the damper rotation shafts 14 provided at both ends in the diameter (rotation axis) direction of the damper 11 are referred to as a first damper rotation shaft 14a and a second damper rotation shaft 14b, respectively. And
The first damper rotating shaft 14a and the second damper rotating shaft 14b are respectively rotatable on bearing portions (first bearing portion and second bearing portion) installed on the inner periphery of the ventilation path. The damper 11 is rotatably held in the air passage by being fitted in a proper state. The bearing portion will be described later.

  FIG. 3 is a diagram for explaining the details of the damper rotation shaft 14, and FIG. 3A shows a case where the first damper rotation shaft 14a and the second damper rotation shaft 14b are integrally formed in a rod shape. FIG. 3B is a diagram in the case where the first damper rotation shaft 14a and the second damper rotation shaft 14b are individually provided at both ends of the damper 11 in the diameter (rotation axis) direction. In FIG. 3, the air flowing in the ventilation path is assumed to flow in the vertical direction in the drawing. In FIG. 3, the description of the damper rotation drive unit and the like is omitted for the sake of simplicity.

As shown in FIG. 3A and FIG. 3B, the first damper rotation shaft 14a and the second damper rotation shaft 14b have a diameter (rotation) of the damper 11 that is orthogonal to the flow path of the air flowing in the ventilation path. One end is provided at each end in the (dynamic axis) direction so as to protrude to the outside of the damper 11. The first damper rotation shaft 14a and the second damper rotation shaft 14b are perpendicular to the flow path of the air flowing in the ventilation path, and one end of each of the damper 11 is in the diametrical direction. As long as it is provided so as to protrude to the outside of the damper 11, it may be integrally formed in a rod shape (see FIG. 3A) or may be provided individually (see FIG. 3B).
In the first embodiment, as shown also in FIG. 1, the damper rotation shaft 14 protrudes at both ends in the diameter (rotation axis) direction of the damper 11, and one end protrudes outside the damper 11. In addition, two (first damper rotation shaft 14a and second damper rotation shaft 14b) are provided separately (see FIG. 3B).
Further, as shown in FIGS. 3A and 3B, the first damper rotation shaft 14 a has a telescopic part 141. Here, the first damper rotation shaft 14a will be described as having the expansion / contraction part 141, but the present invention is not limited to this, and the second damper rotation shaft 14b may have the expansion / contraction part 141. Alternatively, each of the first damper rotation shaft 14a and the second damper rotation shaft 14b may have a telescopic portion 141, and the first damper rotation shaft 14a and the second damper rotation shaft 14a may be provided. It suffices that at least one of 14b has the stretchable part 141.

FIG. 4 is an enlarged view of the telescopic portion 141 included in the first damper rotating shaft 14a. FIG. 4A shows an initial state before the first shaft portion 141a is pushed into the second shaft portion 141b. FIG. 4B is a diagram showing a state in which the first shaft portion 141a is pushed into the second shaft portion 141b by applying a force against the elasticity of the spring 141c.
As shown in FIGS. 4A and 4B, the first damper rotation shaft 14a has a first shaft portion 141a and a second shaft portion 141b, and one end of the first shaft portion 141a is It is inserted into a hole provided in the second shaft portion 141b. The first shaft portion 141a and the second shaft portion 141b are connected by a spring 141c. By applying a force against the elasticity of the spring 141c, the first shaft portion 141a is applied to the second shaft portion 141b. Pushed in.
The first damper rotating shaft 14a forms the expansion / contraction part 141 with the first shaft part 141a, the second shaft part 141b, and the spring 141c, and the expansion / contraction part 141 expands and contracts as described above, so that the expansion / contraction The part 141 is fitted to a bearing provided on the inner periphery of the ventilation path in a rotatable state, and the damper 11 is rotatably installed in the ventilation path.
It should be noted that one end of the damper rotating shaft 14 only needs to protrude so long that the protruding portion protruding outside the damper 11 is caught by a bearing portion provided on the inner periphery of the ventilation path. Moreover, you may provide the retaining mechanism which is not shown in figure so that the 1st axial part 141a may not escape from the hole provided in the 2nd axial part 141b.

In the variable air volume device 1, the operation of causing the damper rotation drive unit to generate torque and rotating 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 a 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 has a depth on FIG. Rotate in the direction. Along with this, the link member 15b slidably connected to the link member 15a by the connecting shaft 15c is also pulled and rotated in the depth direction in FIG. 1A and connected to the other end of the link member 15b, and the damper rotates. The damper 11 held rotatably by the shaft 14 can be rotated in the opening direction.

  Further, for example, when the damper 11 is in the 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 centered on the rotation axis of the motor 12 in FIG. Rotate forward. Along with this, the link member 15b slidably connected to the link member 15a by the connecting shaft 15c is also pushed and rotated forward in FIG. 1B and connected to the other end of the link member 15b, and the damper rotates. The damper 11 held rotatably by the shaft 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 rotating shaft is provided in the diameter direction of the damper, the rotating shaft is extended through a tube such as a detachable duct located outside the outer periphery of the damper, and the detachable duct or the like is extended. The damper is rotated 360 degrees by meshing with the rotating gear through the rotating shaft of the damper motor and the rotating gear on the outside of the tube, so that the damper can be rotated 360 degrees. 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 air volume device 1 according to the first embodiment, as described above, the damper 11 can be rotated by 90 degrees and is held by the damper rotating shaft 14 that holds the damper 11 rotatably, and the damper 11 is rotated. A link mechanism 15, one end of which is connected to the rotation shaft of the motor 12 attached to the damper rotation drive unit holding bracket 13 and rotated by the torque of the motor 12, is directly connected to the damper 11 as the damper rotation drive unit to be driven dynamically. It was made to be.
This eliminates the need for a detachable duct and a configuration in which the rotary shaft of the damper and the rotary shaft of the damper motor are rotationally coupled by meshing the rotary gear outside the detachable duct.
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 a damper 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.
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.

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. 5 is a diagram for explaining an example of a method for attaching the variable air volume device 1 according to the first embodiment of the present invention to the air conveyance path connecting device 21. FIG. FIG. 5B is a diagram for explaining a state immediately before being attached to the air conveyance path connecting device 21 connected to the road, and FIG. 5B 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. 5, the damper rotation drive unit holding bracket 13 has a connecting portion 13 a at the end of the damper 11 in the longitudinal direction of the damper rotation drive unit holding bracket 13. For example, the connection portion 13a is provided with an uncut portion (not shown) having a certain height at the end of the damper rotation drive portion holding bracket 13, and the uncut portion is bent at a right angle toward the damper 11 side. Formed. Here, the right angle includes a substantially right angle. Here, the connecting portion 13a has a screw hole.
In addition, the formation method of the connection part 13a mentioned above is only an example, and the connection part 13a may be formed by the other method, and the variable air volume apparatus 1 is made into the air conveyance path connection apparatus by the connection part 13a. What is necessary is just to attach to the inner wall of 21 so that attachment or detachment is possible.

As shown in FIG. 5, a mounting portion 22 that protrudes toward the air conveyance path is provided on the inner peripheral surface of the air conveyance path connecting device 21. Here, the attachment part 22 shall have a screw hole, and shall be attached to the inner peripheral surface of the air conveyance path connecting device 21 by screwing or the like.
The attachment portion 22 opposes the air conveyance path connection device 21 and the variable air volume device 1 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 air volume device 1 are coaxial. In the state of being arranged, it is provided at a position facing the connecting portion 13 a provided at the end portion in the longitudinal direction of the damper rotation driving unit holding bracket 13 of the variable airflow device 1.

Further, as shown in FIG. 5A, a bearing portion 23, which is a cylindrical recess protruding outside the air conveyance path connection device 21, is formed on the inner peripheral surface of the air conveyance path connection device 21.
The bearing unit 23 is configured such that the air conveyance path connection device 21 and the variable air volume device 1 are opposed to each other so that the center of the inner circumference of the air conveyance path connection device 21 and the center of the damper 11 of the variable air volume device 1 are coaxial. In the disposed state, two locations are provided at positions facing the first damper rotating shaft 14a and the second damper rotating shaft 14b of the variable airflow device 1, respectively.
Here, the bearing portion 23 provided at a position facing the first damper rotating shaft 14a of the variable air volume device 1 is opposed to the first bearing portion 23a and the second damper rotating shaft 14b of the variable air volume device 1. The bearing portion 23 provided at the position to be used as the second bearing portion 23b.

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 connection portion 13 a of the variable air volume device 1 and the mounting portion 22 of the air conveyance path connection device 21 It attaches to the air conveyance path connection device 21 so that attachment or detachment is possible.
When the variable air volume device 1 is attached to the air conveyance path connection device 21, first, the position of the bearing portion 23 of the air conveyance path connection device 21 and the damper rotating shaft 14 of the variable air volume device 1, and the air conveyance path connection device 21. The positions of the attachment portion 22 and the connection portion 13a of the variable airflow device 1 are matched.
Then, the first damper rotating shaft 14a of the variable airflow device 1 is fitted into the first bearing portion 23a formed in the air conveyance path connecting device 21, and the telescopic portion 141 included in the first damper rotating shaft 14a. The second damper rotating shaft 14b of the variable airflow device 1 is fitted into the second bearing portion 23b formed in the air conveyance path connecting device 21.
Further, a spring washer 32 and a washer 33 are fitted onto the screw 31 in the order of the spring washer 32 and the washer 33, and the screw 31 fitted with the spring washer 32 and the washer 33 is tightened from the variable airflow device 1 side to attach the connecting portion 13a. It fixes to the part 22.
As described above, the variable air volume device 1 is attached to the air conveyance path connecting device 21, and the damper 11 of the variable air volume device 1 is rotatably held by the damper rotation shaft 14.

As shown in FIG. 5B, when the variable air volume device 1 is attached to the air conveyance path connection device 21, a part of the variable air volume device 1 is accommodated in the air conveyance path connection device 21.
Specifically, the damper 11 and the damper rotation shaft 14 of the variable air volume device 1, a part of the damper rotation drive unit holding bracket 13, a part of the motor 12, and a part of the link mechanism 15 are It is stored in the air conveyance path connecting 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. In addition, the inner diameter of the air flow path can be secured, and an increase in pressure loss can be suppressed.

When removing the variable airflow device 1, the screw 31 is loosened, the telescopic portion 141 of the first damper rotation shaft 14a of the variable airflow device 1 is pressed and contracted, and the second damper rotation shaft 14b is connected to the air conveyance path. What is necessary is just to remove the fitting to the 2nd bearing part 23b of the apparatus 21, and to remove.
Thus, the variable air volume device 1 can be easily attached to or removed from the air conveyance path connecting device 21.

Here, FIG. 6 is a diagram illustrating an example of the bearing portion 23 provided in the air conveyance path connecting device 21 in the first embodiment.
In the above description, as shown in FIG. 6A, the bearing portion 23 is formed on the inner peripheral surface of the air conveyance path connecting device 21 as a concave portion protruding outside the air conveyance path connecting device 21. The damper rotation shaft 14 of the variable air volume device 1 is fitted in the recess, and the damper 11 is held rotatably.
However, the shape of the bearing portion 23 provided in the air conveyance path connecting device 21 is not limited to this.
For example, as shown in FIG. 6B, the bearing portion 23 is a member having a cylindrical recess, a hole is formed in the air conveyance path connection device 21, and the inner periphery of the air conveyance path connection device 21 is formed in the hole. You may make it install the bearing part 23 from the side.
Further, for example, as shown in FIG. 6C, the bearing portion 23 is a plate-like member having a hole on the surface, and the bearing portion 23 is installed on the inner peripheral side of the air conveyance path connecting device 21. It may be.
Further, the bearing portion 23 may be a ring-shaped member, and the bearing portion 23 may be installed on the inner peripheral side of the air conveyance path connecting device 21.
If the bearing portion 23 is formed as a recess in the inner peripheral surface of the air conveyance path connecting device 21, the number of parts can be reduced. In this way, the bearing portion 23 is a member having a cylindrical depression, a surface By using a plate-like member having a hole or a ring-like member, the damper rotating shaft 14 can be more reliably held by the bearing portion 23.

FIG. 7 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.
7A is an external view of the blowout unit 41, and FIG. 7B is a perspective view of the blowout 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 conveyance path side. FIG. 7C is a perspective view of the blowing 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 outlet side into the room. FIG. 7D is a diagram in which the variable airflow device 1 is in a fully closed state in FIG. 7C.

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. 7A, the blowout unit 41 has an internal space surrounded by a partition wall, a first opening 42 formed on 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.
On the outside of the first wall portion, a cylindrical air conveyance path connecting device 21 connected to the air conveyance path from the air conditioner is attached by, for example, screwing or the like, and the first opening 42 is It is an inflow port for taking air from the air conveyance path connecting device 21 into the blowout unit 41. 7B to 7D, the inner periphery of the first opening 42 is set to be substantially the same as the inner periphery of the air conveyance path connecting device 21.
The 2nd opening part 43 is a blower outlet for ventilating indoors, and is a blower outlet for sending the air from the air conveyance path connection apparatus 21 indoors.
A grid-like grill 44 is detachably fitted in the second opening 43.

As shown in FIGS. 7B to 7D, 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. 7, You may arrange | position in any direction. Further, the first opening 42 is not limited to the one shown in FIG. 7, and any wall portion other than the second opening 43 of the blowout unit 41 is provided on any wall portion. Also good.

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, as shown in FIGS. 3 and 4, the ventilation path and the air conveyance path connecting device 21 have a circular cross section, that is, the surface on which the variable air volume device 1 is attached. For example, an ellipse, a rectangle, etc. may be sufficient.
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 damper rotation driving unit holding bracket 13 is formed in a flat plate shape, but is not limited thereto, and may be L-shaped, T-shaped, or the like. Any material having strength that can hold the motor 12 and the like without hindering it may be used. If the damper rotation drive unit holding bracket 13 is L-shaped or T-shaped, the strength of the damper rotation drive unit holding bracket 13 can be made stronger than the case where the damper rotation drive unit holding bracket 13 is flat. Can be suppressed.

Further, the damper rotation drive unit holding bracket 13 may be attached to the wall surface of the blowout unit 41 so as to be detachable with a bolt or the like instead of being attached to the air conveyance path connecting device 21.
Further, the damper rotation driving unit holding 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, at least one of the first damper rotation shaft 14a and the second damper rotation shaft 14b has the expansion / contraction part 141. However, the present invention is not limited to this. At least one of the damper rotation shaft 14a and the second damper rotation shaft 14b has a bent portion that is bent only when the variable airflow device 1 is attached to the air conveyance path connection device 21. By bending or extending the bent portion, the first damper rotating shaft 14a or the second damper rotating shaft 14b can be replaced with the first mounting portion 22a or the second damper rotating shaft 14b. You may make it fit in the attaching part 22b.

  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.

Further, in the above description, 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 in the fully closed state of the damper in the ventilation path. However, an example of the gap will be described with specific numbers.
For example, in a cylindrical air conveyance path connecting device 21 (outside diameter: about φ148 mm, inner diameter: about φ146 mm) to which a duct of about φ150 mm is connected, the diameter of the damper 11 is set to about φ140 mm. That is, the gap through which the necessary minimum ventilation volume can flow between the outer periphery of the damper 11 and the inner wall surface of the ventilation path is set to about 3 mm. Thus, the area of this gap is set to 10% of the cross-sectional area inside the ventilation path or the air conveyance path connecting device 21. The required 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).
Note that the gap also serves to prevent contact between the damper 11 and the inner wall of the ventilation path due to displacement of the damper 11 or distortion of the ventilation path.

In addition, the gap is not necessarily required, and the structure may be such that the amount of air flowing through the ventilation path is substantially zero when the damper 11 is fully closed. For example, as shown in FIG. 8, the shape of the damper 11 may be an ellipse and may be brought into contact with the inner wall of the ventilation path so that the ventilation path is closed. In FIG. 8, for simplicity of explanation, only the damper 11 is described in the configuration of the variable airflow device 1, the description of the damper rotation drive unit and the like is omitted, and the description of the air conveyance path connection device 21 is also made. Similarly, it is omitted.
In addition, for example, as illustrated in FIG. 9, a protrusion 24 may be formed on the inner wall of the ventilation path, and the damper 11 may be pressed against the protrusion 24 to close the ventilation path. In FIG. 9, for simplicity of explanation, only the damper 11 is described in the configuration of the variable airflow device 1, the description of the damper rotation drive unit and the like is omitted, and the description of the air conveyance path connection device 21 is also made. Similarly, it is omitted.

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. 7 and can 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.
Further, in order to further reduce the pressure loss, it is preferable that the components such as the motor 12, the link mechanism 15, and the damper rotation drive unit holding bracket 13 are sized, shaped, and arranged so as not to resist air flow as much as possible. In order to reduce the pressure loss, it is preferable that the air conveyance path connecting device 21 is disposed so as to protrude into the blowing unit 41.
Further, the attachment portion 22 corresponding to the connection portion 13a of the damper rotation driving portion holding bracket 13 may be installed in the blowout unit 41 instead of in the air conveyance path connection device 21.

  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 is provided at one end of the damper 11 that adjusts the blowout opening area of the air flowing through the ventilation path and one end of the damper 11 in the rotational axis direction. The first damper rotation shaft 14a that rotatably holds the damper 11 by projecting to a predetermined position on the inner wall of the ventilation path and the other end of the damper 11 in the rotation axis direction The second damper rotating shaft 14b that rotatably holds the damper 11 is connected to the damper 11 by projecting to a predetermined position on the inner wall of the ventilation path and being held in contact with the damper 11. A damper rotation drive unit that rotates and changes the angle of the damper 11 and a damper rotation drive unit holding bracket 13 that holds the damper rotation drive unit are provided, and the variable air volume device 1 is installed in the ventilation path. Because I tried to And unnecessary components such as removable duct, ensuring the inner diameter of the channel, it is possible to suppress an increase in pressure loss.

  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 Damper rotation drive part holding bracket 13a Connection part 14 Damper rotation shaft 14a 1st damper rotation shaft 14b 2nd damper rotation shaft 15 Link mechanism 15a, 15b Link member 15c Connection Shaft 21 Air transport path connecting device 22 Mounting portion 23 Bearing portion 23a First bearing portion 23b Second bearing portion 24 Projection portion 31 Screw 32 Spring washer 33 Washer 41 Blowout unit 42 First opening portion 43 Second opening portion 44 Grill 141 Extendable portion 141a First shaft portion 141b Second shaft portion 141c Spring

Claims (13)

A damper that adjusts the blowout opening area of the air flowing in the ventilation path;
A first damper rotation shaft that is provided at one end in the rotation axis direction of the damper and that protrudes to a predetermined position on the inner wall of the ventilation passage and is held in contact with the damper so that the damper is rotatably held. When,
A second damper rotation shaft, which is provided at the other end in the rotation axis direction of the damper, protrudes to a predetermined position on the inner wall of the ventilation path, and holds the damper so as to be rotatable. When,
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 including a damper rotation driving unit holding bracket for holding the damper rotation driving unit in the ventilation path. 2. The variable airflow device according to claim 1, wherein at least one of the first damper rotation shaft and the second damper rotation shaft has an expansion / contraction portion made of an expandable / contractible member. The variable air volume device according to claim 1 or 2, wherein the first damper rotation shaft and the second damper rotation shaft are integrally formed. A connecting portion is provided at an end of the damper rotation driving unit holding bracket,
It is detachably attached to the ventilation path by the connection part and an attachment part provided to face the connection part on the inner periphery of the ventilation path,
In a state attached to the ventilation path,
The first damper rotation shaft and the second damper rotation shaft are respectively fitted into a first bearing portion and a second bearing portion formed in the ventilation path, thereby rotating the damper. The variable air volume device according to any one of claims 1 to 3, wherein the variable air volume device is freely held. The said 1st bearing part and 2nd bearing part are the recessed parts formed in the outer peripheral surface of the said ventilation path so that it might protrude outside the said ventilation path, respectively. Variable air volume device. 5. The variable air volume device according to claim 4, wherein each of the first bearing portion and the second bearing portion is a member having a cylindrical depression that is installed in the ventilation path. The variable air volume device according to claim 4, wherein each of the first bearing portion and the second bearing portion is a ring-shaped member installed in the ventilation path. The variable air volume device according to claim 4, wherein each of the first bearing portion and the second bearing portion is a plate-like member having a hole on the surface, which is installed in the ventilation path. 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 airflow device according to any one of claims 1 to 8, characterized in that: The variable air volume device according to any one of claims 1 to 9, wherein a main part of the ventilation path is a cylindrical air conveyance path connecting device installed in a blowout unit. 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 A blow unit having a second opening formed on a wall and configured to send air from the air conveyance path connecting device into the room is installed in the air conveyance path connecting device. Item 15. The variable air volume device according to Item 10. 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 11. The motor is
It is a stepping motor with a gear. The variable air volume apparatus of Claim 12 characterized by the above-mentioned.

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