KR101367750B1 - Device for constant air volume control - Google Patents

Abstract

According to an embodiment of the present invention, an apparatus for controlling air flow rate includes a flow rate control unit rotatably connected to a coupling shaft coupled to the duct in a duct, and a fluid collided with the airflow control unit compresses the front side of the airflow control unit. In order to increase the pressing force, one end portion is connected to the front side of the air volume control unit is connected to form a closed space at the boundary portion, the duct divider for dividing the duct in the longitudinal direction of the duct, and the air volume control unit An elastic part provided at one side to be coupled to the coupling shaft and the other side to press the rear side of the air volume control unit so as to adjust the opening degree of the air volume control unit according to the magnitude of the action force of the fluid pressurizing the front side; To rotate within the range, one side is attached to the coupling shaft and the other side is in contact with the predetermined range of rotation of the air volume control unit. W may include a stopper for restricting the flow rate control portion rotates.
As a result, the air flow can be adjusted without an electrical connection by the pressing force for the fluid flowing into the duct to the wind direction control unit and the pressing force for the elastic unit to press the wind direction control unit. There is a possible effect.

Description

DEVICE FOR CONSTANT AIR VOLUME CONTROL}

The present invention relates to a constant air volume adjusting device, and more particularly, to a constant air volume adjusting device that can maintain a constant air volume.

In general, indoor buildings, such as buildings are mainly introduced into the indoor air through the duct system installed on the ceiling.

Here, the airflow control device introduced through the duct system includes a variable airflow control device to change the airflow flow into the room, and a constant airflow flow control device to change the temperature and humidity while maintaining a constant airflow flow into the room, The present invention relates to a constant air volume control device.

1A and 1B according to the exemplary embodiment of the present invention, when air in the direction of the arrow flows into the airflow control damper 10, as illustrated in FIGS. 1A and 1B, the airflow duct 11 and the airflow control are controlled. Air flows through the gap 13 between the blades 12, but at this time, since the air volume control blade 12 is bent by the pressure of air, the gap 13 between the duct 11 and the air volume control blade 12 ) Is blocked.

Here, since the bending degree of the air volume control blade 12 is changed according to the amount of air flowing, the degree of blocking the gap 13 between the duct 11 and the air volume control blade 12 is also changed, through which the air volume The adjustment of was possible.

In other words, if the amount of air flowing increases the amount of air control blade 12 is bent a lot of air into the room, if the amount of air flow is reduced, the amount of air flow is reduced because the air volume control wing 12 is less air The amount of is introduced into the room, whereby it is configured to control the air volume.

However, in the conventional constant air volume control device according to an embodiment it is not easy to control the flow of air during the adjustment of the air volume through the air volume control blades 12, thereby increasing the error of the amount of air flowing into the room There was a problem.

In addition, the conventional airflow volume adjusting apparatus according to the embodiment has a problem that the open area ratio curve (a) is not proportional to the opening rate (see FIG. 3), so that precise control of the airflow volume adjustment is not easy.

On the other hand, according to another embodiment of the conventional airflow control device, as shown in Figure 2, after sensing the flow of air flow in the sensor 22, the driver 26 such as a motor according to the value calculated by the control unit 24 It was configured to drive the airflow control unit 28 to adjust the airflow.

Here, since the conventional airflow adjusting device according to another embodiment requires the sensor 22, the control unit 24 and the driver 26 to be electrically connected, the installation cost is increased, installation is not easy, and at the time of power failure There was a problem that can not be used.

The apparatus for adjusting the amount of air flow according to the present invention is derived to solve the above-mentioned conventional problems, and aims at solving the following problems.

As an aspect, an object of the present invention is to provide a constant air volume control device capable of precise control of the air volume control by the action of the action force and the elastic force of the fluid compressed to the member for dividing the inside of the duct.

In addition, the present invention as one aspect, it is possible to adjust the air flow rate without the electrical connection through the pressing force of the fluid flowing into the duct and the elastic force of the elastic body, thereby adjusting the constant air flow rate to allow a certain amount of air flow into the room It is for the purpose of providing a device.

In addition, an aspect of the present invention is to provide a constant air volume control device that can be more precisely controlled the amount of air flowing into the room is improved to improve the proportion of the open area to the opening rate compared to the conventional air volume control device. .

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, an apparatus for controlling air flow rate includes a flow rate control unit rotatably connected to a coupling shaft coupled to the duct in a duct, and a fluid collided with the airflow control unit compresses the front side of the airflow control unit. In order to increase the pressing force, one end portion is connected to the front side of the air volume control unit is connected to form a closed space at the boundary portion, the duct divider for dividing the duct in the longitudinal direction of the duct, and the air volume control unit An elastic part provided at one side to be coupled to the coupling shaft and the other side to press the rear side of the air volume control unit so as to adjust the opening degree of the air volume control unit according to the magnitude of the action force of the fluid pressurizing the front side; To rotate within the range, one side is attached to the coupling shaft and the other side is in contact with the predetermined range of rotation of the air volume control unit. W may include a stopper for restricting the flow rate control portion rotates.

delete

In addition, the elastic portion control device according to an embodiment of the present invention may be formed of a leaf spring.

And, in the static air volume control device according to an embodiment of the present invention, the elastic portion may be provided in a shape including a coil spring.

In addition, the apparatus for controlling air volume according to an embodiment of the present invention may further include an elastic control unit coupled to an outer side of the elastic unit to move along the outer side of the elastic unit in order to adjust the elasticity of the elastic unit.

In addition, the apparatus for controlling a constant airflow volume according to an embodiment of the present invention may further include a coupling shaft adjustment unit configured to adjust and set the initial opening degree of the airflow control unit from the outside by the rotation of the coupling shaft.

In addition, the duct and the air volume control unit in the constant air volume control device according to an embodiment of the present invention may be formed in a circular shape or a square shape.

In addition, the apparatus for controlling air flow amount according to an embodiment of the present invention may further include a sealing member for sealing the air flow rate adjusting part and the duct splitting part.

In addition, the flow rate adjusting device according to an embodiment of the present invention is a flow path that protrudes into the duct along the inner edge of the duct to which the coupling shaft is coupled, so that the air flow can be linearly added or subtracted from the open position of the air volume control unit. It may further include an extension.

In addition, the flow passage expansion unit may have a circular cross section or a square cross section in which a hollow is formed, and the outer diameter of the flow rate control unit may correspond to an inner diameter of the flow passage expansion unit.

The apparatus for adjusting the amount of airflow according to an embodiment of the present invention has the following effects.

The apparatus for controlling airflow volume according to an embodiment of the present invention includes a duct splitting portion for dividing the inside of the duct to reduce the error range of the amount of airflow flowing into the room by the action force of the fluid and the action of the elastic portion, thereby precisely controlling the airflow control. Has the possible effect.

In addition, the apparatus for adjusting the airflow volume according to an embodiment of the present invention may adjust the airflow volume without an electrical connection by the pressing force for the fluid flowing into the duct to pressurize the wind direction control unit and the elastic unit pressurize the wind direction control unit. As a result, it is possible to introduce a certain amount of air flow into the room.

In addition, the airflow control device according to an embodiment of the present invention is improved to have an open area ratio relative to the opening rate in proportion to the conventional airflow control device by a flow passage expansion unit to more precisely control the airflow flowing into the room. It can be effective.

In addition, since the apparatus for controlling the constant airflow amount according to an embodiment of the present invention does not require a sensor, a motor, and a controller, an installation cost is reduced, the installation is simple, and there is an effect that can be used even during a power failure.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 (a) and 1 (b) are a perspective view and a side cross-sectional view of a constant air volume adjusting device according to a conventional embodiment.
Figure 2 is a side cross-sectional view showing the flow of the fluid in the constant flow amount control apparatus according to another embodiment.
Figure 3 is a graph showing the open area ratio and the air volume change rate compared to the opening rate of the present invention and the conventional airflow control device.
4 is a perspective view of an apparatus for controlling air flow amount according to an embodiment of the present invention.
5 to 6 is a cross-sectional view of the operation of the constant air volume control device according to an embodiment of the present invention.
7 is a comparison diagram for comparing the difference with the static air flow rate adjusting apparatus of the present invention.
8 to 10 is a view showing an embodiment of the elastic portion of the static air volume control device of the present invention.
11 is a perspective view of an embodiment without a flow path expansion unit of the static air flow control device according to an embodiment of the present invention.
12 is a view showing an elastic control unit of the constant air volume control apparatus according to an embodiment of the present invention.
13 is a graph of experimental data of the apparatus for controlling air flow amount according to an embodiment of the present invention.

As used herein, the singular forms "a", "an", and "the" include the plural expressions unless the context clearly dictates otherwise. , Number, steps, actions, components, parts, or combinations thereof, or the presence or addition of one or more other features or numbers, step actions, components, parts, or combinations thereof. It should be understood that it does not exclude.

Hereinafter, the airflow regulator 100 will be described in detail with reference to the accompanying drawings.

Referring to FIG. 4, the airflow control device 100 according to an embodiment of the present invention is rotatably connected to the coupling shaft 104 coupled to the duct 102 in the duct 102. 110.

In addition, the apparatus for controlling air flow rate 100 according to an embodiment of the present invention bisects the duct 102 in the inflow direction of the fluid in the duct 102, and the pressure of the fluid compressed on the inflow side when the air volume changes. It includes a duct divider 140 is provided so that the change acts on the airflow control unit 110.

And, the constant air volume control device 100 according to an embodiment of the present invention is coupled to the coupling shaft 104, the pressure change generated when the air volume changes by adjusting the rotation of the air volume control unit 110 to control the air volume It includes an elastic portion 130 to control the opening degree of the portion 110 to make the amount of air flowing through the duct 102 constant.

In addition, the apparatus for controlling air flow amount 100 according to an embodiment of the present invention includes a stopper 120 coupled to the coupling shaft such that the air volume control unit 110 rotates within a predetermined range.

Hereinafter, each configuration will be described in detail.

Referring to FIG. 4, the air volume adjusting unit 110 is provided to be rotatably connected to the coupling shaft 104 coupled to the duct 102 inside the duct 102.

Here, the coupling shaft 104 is rotatably fixed inside the duct 102. That is, the coupling shaft may be fixed to the duct 102 first, but is provided to be rotatable through the coupling shaft adjusting unit 150.

In addition, the air volume adjusting unit 110 is rotatably connected to the coupling shaft 104 through a bearing 106 connected to the coupling shaft 104.

That is, as shown in Figure 4, since the coupling shaft 104 is fixed to the duct 102 after the coupling shaft 104 is inserted into the bearing 106, the bearing 106 is the coupling shaft ( It becomes rotatable on 104).

In addition, since the bearing 106 is fixed to the side surface of the air flow control unit 110, the air flow control unit 110 also rotates in accordance with the rotation of the bearing 106.

On the other hand, the stopper 120 is coupled to one side of the coupling shaft 104 so that the air volume control unit 110 rotates within a predetermined range.

For example, as shown in Figure 4, if the stopper 120 is formed in the lower direction of the coupling shaft 104, even if the air flow control unit 110 is rotated in the downward direction to the stopper 120 I can't turn anymore.

That is, the air volume control unit 110 may be provided to be rotated downward to the position where the sorter is formed.

In addition, it is coupled to the coupling shaft 104, the pressure change generated when the air volume changes by adjusting the rotation of the air volume control unit 110 to control the opening degree of the air volume control unit 110 to flow in the duct 102 An elastic portion 130 for providing a constant air volume is provided.

That is, as shown in FIG. 5, when the air volume decreases, an action force for pressing the rear side of the air volume control unit 110 by the elastic unit 130 is introduced through the duct 102 to adjust the air volume. Since the air force greater than the action force of the fluid to press the front side 110, the air flow control unit 110 is moved in the direction of the arrow (A), the opening degree of the air flow control unit 110 is increased.

On the other hand, as shown in Figure 6, when the air volume is increased, the fluid compressed in one side of the duct split unit 140 to be described later to press the front side of the air volume control unit 110, and press the front side Since the action force of the fluid is greater than the action force of the elastic portion 130 for pressing the rear side of the airflow control unit 110, the airflow control unit 110 is moved in the direction of the arrow (B), the airflow control unit ( The opening degree of 110) is reduced.

As a result, as described above, according to one embodiment of the static air flow control device 100 of the present invention, if the amount of air flowing through the duct 102 is reduced, the opening degree of the air flow control unit 110 is increased. If the amount of air flowing through the duct 102 is increased, the opening degree of the air volume adjusting unit 110 is reduced.

That is, as shown in Figure 5, the opening degree (L1) of the air volume control unit 110 when the air volume is reduced, as shown in Figure 6, the opening degree of the air volume control unit 110 when the air volume is increased It becomes possible to form larger than (L2).

Through the operation process as described above through the air flow control unit 110, the air flow flowing into the room can be maintained within a certain range.

That is, a predetermined amount of air may be introduced into the room even without the control of the electrical device by the pressing force of the fluid flowing through the duct 102 and the pressing force of the elastic unit 130.

For example, when the amount of air flowing through the duct 102 decreases from 5 to 4, the opening degree of the air volume control unit 110 is increased by the elastic unit 130 to increase the air volume of 4. All of these flow through the air volume control unit 110, the air volume of the four can be introduced into the room.

However, when the amount of air flowing through the duct 102 is increased from 5 to 6, the opening degree of the air volume control unit 110 is reduced by the pressure of the fluid, so that the air volume of all 6 air flow control unit 110 ) Can not pass through, only 4 of the air flow can enter the room.

Therefore, regardless of the degree of the amount of air flowing through the duct 102, the air volume within the predetermined range (air volume 4 in the above example) may be introduced.

Referring to FIG. 12, the elastic adjusting unit 180 may be coupled to an outer side of the elastic unit 130 to move along the outer side of the elastic unit to adjust the elasticity of the elastic unit 130.

That is, when there is no elastic control unit 180, the elastic unit 130 may be deformed the entire elastic member constituting the elastic unit 130.

However, as shown in FIG. 12, when the elastic control unit 180 is coupled to the outside of the elastic unit 130, the elastic control unit 180 and the elastic unit 130 are coupled to each other. Since the elastic unit 130 may not cause deformation such as bending, deformation may occur only in a portion where the elastic control unit 180 is not coupled.

Here, since the elastic control unit 180 is movable along the outer side of the elastic unit 130, thereby, the elastic control unit 180 is provided to adjust the degree of elasticity of the elastic unit 130. .

In addition, the elasticity of the elastic portion 130 is adjusted by the elastic control unit 180, thereby, the rotation of the air volume control unit 110 is adjusted.

For example, in FIG. 12, when the elastic control unit 180 is moved upward along the outer side of the elastic unit 130, the elastic unit 130 becomes deformable when subjected to greater force.

Here, since the deformation degree of the elastic portion 130 is less when the elastic control unit 180 is moved upward than when the elastic control unit 180 is moved downward, the airflow control unit 110 The degree of opening is increased.

That is, if the same amount of air flows into the duct 102, when the elastic control unit 180 is moved upward than when the elastic control unit 180 is moved downward, the opening degree of the air volume control unit 110 Since increases, a large amount of air flows into the room.

Meanwhile, referring to FIG. 4, the duct divider 140 is installed to bisect the duct 102 in the inflow direction of the fluid in the duct 102.

When the air flow rate changes, the duct divider 140 compresses the fluid at one side of the duct divider 140, that is, in the closed space S1 at the boundary between the air flow control unit 110 and the duct divider 140. It is prepared to be (see Fig. 6).

As shown in FIG. 7, when the duct split unit 140 is not installed, the fluid flowing into the upper region of the air volume control unit 110 hits the air volume control unit 110 and then the air volume control unit. It flows to the lower region along the inclination formed in the 110 and flows out through the open portion in the lower region of the airflow control unit 110.

In this case, the fluid is insufficient enough to act on the air flow control unit 110, the air flow control unit 110 is not greater than the force of the elastic portion 130 acting on the rear side of the air flow control unit 110, 110 Decrease in the degree of opening is not sufficient.

However, according to one embodiment of the present invention, as shown in FIG. 6, since the duct divider 140 is installed inside the duct 102, the air flow rate flows into the upper region of the air flow control unit 110. The fluid that flows into the lower region along the inclination formed in the air volume control unit 110 after hitting the air volume control unit 110, but is no longer moved to the lower region by the duct divider 140, the air volume The control unit 110 and the duct divider 140 is collected at the boundary portion.

Here, the fluid continuously collected in the closed space (S1) of the boundary between the air flow control unit 110 and the duct divider 140 is compressed, whereby the action force of the fluid larger than the action force of the elastic portion 130. This may occur, it is possible to reduce the opening degree of the air volume control unit 110 by the action force of the fluid.

In addition, at the boundary between the airflow control unit 110 and the duct divider 140, sealing may be performed through the sealing member 160 to form a closed space S1 while maintaining airtightness. .

Here, the sealing member 160 may be made of synthetic resin, rubber or silicon.

As a result, the above-described operation enables precise control so that a certain amount of air flows into the room regardless of the air flow introduced into the duct 102.

On the other hand, the air volume control unit 110 may be formed in a variety of shapes, it is preferably formed in a shape corresponding to the shape of the duct (102). That is, as shown in FIG. 4, if the cross section of the duct 102 is circular, the air volume control unit 110 may also be formed in a circular shape.

Alternatively, if the cross section of the duct 102 is a square, the air volume control unit 110 may also be formed in a square.

The elastic unit 130 may be formed in various forms. That is, as shown in Figure 4, the elastic portion 130 is formed of a leaf spring 132, one side may be coupled to the coupling shaft 104.

In addition, the other side of the leaf spring 132 may be coupled to the air volume control unit 110, or may be disposed spaced at a predetermined interval.

8 to 10, the elastic part 130 may be provided in a shape including coil springs 134, 136, and 138.

That is, as shown in Figure 8, the portion formed of the coil spring 134 in the elastic portion 130 is inserted into the coupling shaft 104, one side of the coil spring 134 is the coupling shaft 104 The fixed portion (135), which extends from the other side of the coil spring 134 may be coupled to the air flow control unit 110 or spaced a predetermined interval to pressurize the air flow control unit 110. .

In addition, the elastic portion 130, as shown in Figure 9, one side of the coil spring 136 is coupled to the air volume control unit 110, the other side of the coil spring 136 is a plate member ( It is connected to the 137, the plate member 137 is coupled to the coupling shaft 104 may be provided to press the airflow control unit 110.

And, as shown in Figure 10, the elastic portion 130 may include a plurality of coil springs 138, the coupling shaft on both sides of the coupling member 139 is coupled to the coupling shaft 104 The coil spring 138 inserted into the 104 may be coupled to be provided to press the airflow control unit 110 through the coupling member 139.

On the other hand, the elastic portion 130 is not limited to the above embodiment, it turns out that other various embodiments are possible.

Referring to FIG. 4, the coupling shaft adjusting unit 150 may set and adjust the initial opening degree of the air volume control unit 110 by the rotation of the coupling shaft 104, that is, the coupling shaft ( 104) is formed to control the fixing and rotation.

Since the amount of air introduced into the room may be different according to various environments such as seasons or regions, the opening degree of the air volume adjusting unit 110 may be adjusted through the coupling shaft adjusting unit 150.

That is, if the air volume adjusting unit 110 is initially set to be inclined at a predetermined angle with respect to the horizontal axis, and then the amount of air flowing into the room needs to be increased, a duct (through the coupling shaft adjusting unit 150) may be used. 102 may be adjusted so that the angle (θ3) formed by the air volume control unit and the horizontal axis is reduced by rotating the coupling shaft 104 is fixed to the inside.

As a result, the initial opening degree of the air volume control unit 110 may be increased to increase the amount of air flowing into the room.

On the other hand, if the amount of air flowing into the room needs to be reduced, the coupling shaft 104 may be adjusted such that the angle (θ3) between the air volume control unit and the horizontal axis is increased through the coupling shaft adjusting unit 150.

As an example, if the airflow rate is introduced through the duct 102 when the fixing shaft 104 is fixed by adjusting the angle of the airflow control unit 110 so that the airflow of the air flows into the room 4 initially. Regardless of the amount of air flows into the room 4.

However, if the amount of air flow more than 4 should be introduced into the room, by releasing the fixed coupling shaft 104 through the coupling shaft adjustment unit 150 to rotate the coupling shaft 104 by a predetermined angle and then fixed again. The air volume control unit 110 coupled to the coupling shaft 104 is also rotated.

Here, when the coupling shaft 104 is rotated so that the angle (θ3) formed by the air volume control unit 110 and the horizontal axis is decreased, the opening degree of the air volume control unit 110 is increased, so that the air volume of the air volume is greater than 4 in the room. Sheep can be introduced.

5 to 6, the flow path expansion unit 170 linearly modulates the air volume at the open position of the air volume control unit 110, and an inner edge of the duct 102 to which the coupling shaft 104 is coupled. It is formed to protrude into the duct 102 along the.

Here, the flow path expansion unit 170 may be provided to expand the flow path according to the angular position of the air flow control unit 110 when the air flow control unit 110 is opened.

Open area ratio curve (a) in the conventional air volume control device is not provided with a flow path expansion unit 170 is significantly out of the proportional line (c) according to the opening rate of the air volume control unit (see Fig. 3).

The reason is that, as shown in FIG. 2, when the radius R of the air volume control unit 28 is assumed to be '1', when the air volume control unit 28 is rotated by an arbitrary angle θ1, The area where the end of the air volume control unit 28 is open from the inner surface of the duct, that is, the flow path area through which the fluid can flow corresponds to 1-cosθ1, which is a cos function.

The flow path area of the cos function 1-cos θ1 is a state in which the air volume control unit 28 is vertically disposed to block the flow path, that is, the air volume control unit 28 is horizontally disposed from an angle θ1 of 0 ° to completely fill the flow path. It is continuously formed up to 90 degrees in an open state, that is, the angle θ1.

In addition, as shown in FIG. 3, the airflow rate change curve b is rotated by an arbitrary opening angle θ1 to have a low opening rate (0 to 33%), that is, the opening angle. When (θ1) is 0 to 30 °, the air volume change rate is less than the air flow rate directly proportional to the direct line c according to the opening rate, that is, proportional to the open area rate curve (a).

However, the flow rate change rate curve (b) has a high opening degree (50 to 100%), that is, when the opening angle (θ1) is 45 ° to 90 °, the flow of fluid is directed to one side by the inclination of the airflow control unit 28. The same phenomenon occurs and a saturation phenomenon in which a larger amount of air flows than the open area ratio curve (a) appears.

Here, it can be seen that as the opening degree increases, the supersaturation phenomenon of the airflow rate change rate is intensified, as shown in the airflow rate change rate curve (b) relative to the open area rate curve (a).

The reason for this is that at a low opening rate (0 to 33%), that is, at an opening angle (θ1) of 0 ° to 30 °, the cos function of which the open area ratio of the air volume control unit 28 is smaller than the direct line c according to the opening rate is relatively small. The flow path is reduced because it is opened too small to 1-cosθ1, and the inclined structure of the airflow control unit 28 interferes with the fluid flow at such a low opening angle θ1 so that the rate of change of the airflow is relatively small.

However, at a high opening rate (50 to 100%), that is, at an opening angle (θ1) of 45 ° to 90 °, even if the open area ratio of the air volume control unit 28 is relatively smaller than the direct line c according to the opening rate, The inclined structure of the adjusting unit 28 does not interfere with the flow of the fluid, and as shown in FIG. 2, guides the fluid flow in the upper region to the lower region around the coupling axis of the air volume adjusting unit 28. There was a problem that the overflow phenomenon (see the overflow phenomenon curve (e) of Figure 3).

However, in one embodiment of the present invention, as shown in FIG. 5, the opening degree is “1-COSθ2” according to the opening degree angle position at the low opening angle of the airflow control unit 110. It is provided to compensate and expand the flow path so that it can be opened as a function of and open in proportion to the opening degree (see Fig. 5).

That is, the length L1 opened in FIG. 5, which corresponds to an embodiment of the present invention, is longer than the length L opened in FIG. 2, which corresponds to the conventional invention, and thus, the open area is further increased. As a result, as described above, the compensation expansion of the flow path can be made to open in proportion to the opening degree.

As shown in FIG. 5, the flow path expansion unit 170 has a curved surface, and the curved surface is formed to compensate for the open area ratio of (θ 2/90) − (1-COSθ 2), and accordingly the air volume The adjusting unit 110 opens at a low opening degree, that is, an opening rate of θ2 / 90 at an opening rate of 0 to 30% (0 ° to 27 °).

In the above, θ2 is an opening degree angle from the state in which the air volume control unit 110 is closed.

In addition, the flow path expansion unit 170 may be formed in a circular cross section or a square cross section in which the hollow 172 is formed to be mounted on the inner surface of the duct 102, and the outer diameter of the air flow control unit 110 and the flow path expansion unit. The inner diameter of the unit 170 may be formed to correspond.

That is, the air volume control unit 110 may be formed to match the inner diameter of the flow path expansion unit 170.

In addition, the present invention bisects the duct 102 in the duct 102 together with the flow path expansion unit 170, and may include a duct divider 140 in which fluid is compressed at one side when the air volume increases.

As described above, when the flow path expansion unit 170 and the duct divider 140 are provided at the same time, the characteristics of the open area ratio curve (a '), the air flow rate change curve (f) compared to the opening degree as shown in FIG. It can have values.

That is, the open area rate curve a 'shown in FIG. 3 may have a shape closer to the direct line c according to the open rate at a lower open rate (0 to 30%) than the open area rate curve a. have.

Here, referring to FIG. 5, if the opening angle θ2 is taken as an example from the state in which the air volume control unit 110 is closed, that is, the passage is blocked, the opening angle θ2 is 9 ° (opening ratio 10%). When the opening is opened as much as possible, the flow path expansion unit 170 compensates and expands the flow path opening area by 9 / 90- (1-COS 9 °), and gradually opens the opening angle θ2 by 27 ° (opening rate 30%). When opened, the flow path expansion unit 170 may increase and increase the flow volume by compensating and expanding the flow path opening area by 27 / 90- (1-COS27 °).

As shown in FIG. 3, when the flow path expansion unit 170 is within 30% of the opening degree, that is, the opening angle θ2 of the airflow control unit 110 is within 27 °, the open area ratio curve a ′ versus the opening rate. By this direct proportion, it can be seen that there is an effect that is improved compared to the conventional.

Here, the open area ratio curve (a ') is directly proportional to the opening rate until the opening rate is 0 to 50%. As a result, the air volume change rate (f) relative to the opening rate is improved as a proportional characteristic, so that the air volume control can be made more precisely and precisely. have.

On the other hand, when the opening rate is 50% or more, the air volume change rate (f) relative to the opening rate is improved by the duct splitter 140 to a directly proportional characteristic, so that the air volume control may be more accurate.

Since the closed space blocks the flow of the fluid flowing from the upper region to the lower region due to the duct divider 140, the overflow phenomenon of the fluid flowing excessively at a high opening rate of the airflow control unit 110, that is, 50% or more. Properties such as curve e can be effectively suppressed.

Therefore, if the opening rate of the air volume control unit 110 is 50% or less, the open area ratio a 'is significantly improved compared to the opening rate due to the flow path expansion unit 170, and thus the air volume change rate f is directly proportional to the opening rate. In the case of improved characteristics, when the opening degree is greater than 50%, the duct split part 140 can effectively suppress the overflow phenomenon and prevent excessive fluid flow.

As a result, the variable air volume control device according to the present invention having the flow path expansion unit 170 and the duct divider 140 at the same time has a flow rate change rate curve f as shown by the solid line in FIG. It has a rate of change of the air volume very close to the direct proportional line (c) according to the opening rate over the entire opening rate section, that is, 0 to 100%, and thus more accurate and precise air volume control according to the opening rate is possible.

As a result, when adjusting the initial opening degree of the air volume control unit 110 through the coupling shaft control unit 150, as shown in FIG. 3 in a predetermined range in which the air volume control unit 110 is opened, opening degree Since the contrast air volume change rate f is formed to be nearly linear, control of the air volume becomes easy.

As an example, if the airflow amount introduced into the room is four, when the flow path expansion unit 170 is not provided, the opening degree of the airflow control unit 110 should be relatively increased as well as the opening rate. It is not easy to control because the rate of change of the air volume is not linear, and the fluid flowing into the room may have a large amount of air and a large amount of error.

However, when the flow path expansion unit 170 is provided, it is possible to secure a sufficient open area even if the opening degree of the air volume control unit 110 is not large, thereby allowing the indoor flow of the air volume 4.

In addition, in the case where the flow path expansion unit 170 is provided, as described above, since the air flow rate change rate is closer to the linearity, it is easier to control the air flow rate adjusting unit 110 through the coupling shaft adjusting unit 150. Adjusting the degree of opening of) has the effect that the amount of air close to 4 can be introduced into the room.

However, the apparatus for controlling air flow amount 100 according to an embodiment of the present invention may have a form without the flow path expansion unit 170 as shown in FIG. 11.

On the other hand, Figure 13 is a graph for the experimental data of the constant air flow rate adjusting apparatus 100 according to an embodiment of the present invention.

That is, the graph of FIG. 13 is a graph of the percentage of the amount of air to be introduced into the room with respect to the amount of air flowing into the duct.

Assuming 100% of the desired air flow rate to be introduced into the room, according to the graph of FIG. 13, even if the duct inflow air flow into the duct 102 varies from 0.2 to 1.6, the air flow rate into the room is ± 5 at 100%. It can be seen that the accuracy is within the error range of%.

It is to be understood that within the scope of the technical idea included in the specification and drawings of the present invention, the description of the present invention, the present embodiment, and the drawings attached hereto are only a part of the technical idea included in the present invention, The present invention is not limited to the above-described embodiments, and various modifications and changes may be made without departing from the scope of the present invention.

100: constant airflow regulator 102: duct
104: coupling shaft 106: bearing
110: air flow control unit 120: stopper
130: elastic portion 132: leaf spring
134: coil spring 136: coil spring
138: coil spring 140: duct split
150: coupling shaft control unit 160: sealing member
170: euro expansion unit 172: hollow
180: elastic control unit

Claims (9)

An air volume control unit rotatably connected to a coupling shaft coupled to the duct inside the duct;
In order to increase the action force for compressing the fluid hit the air flow control unit to press the front side of the air flow control unit, one end is connected to the front side of the air flow control unit is connected to form a closed space at the boundary portion, the length of the duct A duct divider for dividing the duct in a direction;
An elastic part coupled to the coupling shaft and pressurized on a rear side of the air flow control part so as to adjust the opening degree of the air flow control part according to the magnitude of the action force of the fluid for pressing the front side of the air flow control part; And
A stopper on which one side is attached to the coupling shaft and the other side is in contact with the predetermined amount of rotation of the air volume control unit so as to rotate the air volume control unit within a predetermined range to limit the rotation of the air volume control unit;
Constant air flow rate adjusting device comprising a. The method of claim 1,
The amount of air flow adjustment device characterized in that the elastic portion is formed by a leaf spring. The method of claim 1,
The elastic portion volume control device, characterized in that provided in a shape including a coil spring. The method of claim 1,
In order to adjust the elasticity of the elastic portion, the static air volume control device further comprises an elastic control unit is coupled to the outer side of the elastic portion provided to move along the outer side of the elastic portion. The method of claim 1,
And a coupling shaft adjusting unit which can be set by adjusting the initial opening degree of the air volume adjusting unit from the outside by the rotation of the coupling shaft. The method of claim 1,
The duct and the air volume control unit is a constant air volume control device, characterized in that formed in a circular shape or a square shape. The method of claim 1,
The air volume control device further comprises a sealing member for sealing the air flow rate control unit and the duct divider. The method of claim 1,
And a flow passage expansion part protruding inward to the duct along the inner edge of the duct to which the coupling shaft is coupled, so as to linearly adjust the air volume at the open position of the air volume control unit. 9. The method of claim 8,
The flow passage expansion unit has a circular cross section or a square cross section in which the hollow is formed, and the constant flow amount adjusting device, characterized in that the outer diameter of the air flow rate control unit and the inner diameter of the flow passage expansion unit is formed to correspond.

Images