Air volume control device for air-conditioning channel member

Abstract

To provide an air volume control device capable of automatically controlling an air volume in accordance with the air volume of an air-conditioning channel member such as an air-conditioning duct or its variation, without need for manual adjustment and without use of power.SOLUTION: An air-conditioning channel member 6 is provided with an air volume control device 10. The air volume control device 10 comprises a rotor 11 that includes a blade 13 rotated to open / close a channel 6a of the air-conditioning channel member 6 by wind pressure, and moment control means 20 for making the rotor 11 generate additional moment Ma according to a rotation angle of the blade 13 so that total moment MCW in an opening direction and total moment MCCW in a closing direction, which are applied to the rotor 11, can be balanced when an air volume q within the air-conditioning channel member 6 is a set air volume q0.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an air flow rate regulator provided in an air conditioning flow path member such as an air conditioning duct, a chamber, or an air outlet, and more particularly to an air flow rate regulator that opens and closes a flow path in an air conditioning flow path member by rotating blades. [Background technology]

[0002] For example, buildings such as office buildings are equipped with air conditioning equipment including air conditioners and distribution means (see Patent Document 1, etc.). The distribution means includes a branch chamber connected to the air conditioner and multiple air conditioning ducts that branch off from the branch chamber and extend to each of the areas to be air-conditioned. An air volume adjustment device is provided near the outlet at the end of each air conditioning duct to reduce variations in the air volume blown out from the air conditioning ducts.

[0003] For example, the air volume control device in Patent Document 2 includes blades that can rotate around a rotation axis that is perpendicular to the flow path of the air conditioning duct. By manually adjusting the angle of the blades, the actual air volume can be adjusted to match the set air volume.

[0004] In the air volume regulator of Patent Document 3, the blades are rotated by a drive mechanism to adjust the angle. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-107465 [Patent Document 2] Japanese Patent Application Laid-Open No. 2000-039204 [Patent Document 3] Japanese Patent Publication No. 2021-148331 Summary of the Invention [Problem to be solved by the invention]

[0006] Manual air volume regulators are not only time-consuming and cumbersome to adjust, but also unable to respond to unexpected fluctuations in air volume during operation. Air volume regulators with drive mechanisms are complex systems that require motors and other power sources and feedback control mechanisms, which increase initial costs and require maintenance of the power and moving parts. In view of the above circumstances, the present invention aims to provide an air volume adjustment device that can automatically adjust the air volume in accordance with the air volume or its fluctuations in an air conditioning flow path component such as an air conditioning duct, without requiring manual adjustment or using power. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides an air volume adjusting device provided in an air conditioning flow path member including an air conditioning duct, a chamber, or an air outlet, comprising: a rotor including blades that are rotated to open and close the flow path of the air conditioning flow path member by wind pressure; a moment adjusting means for applying an additional moment to the rotor in accordance with the rotation angle of the blades so that a total moment in the opening direction and a total moment in the closing direction applied to the rotor are balanced when the air volume in the air conditioning flow path member is a set air volume; The present invention is characterized by the following.

[0008] In this air volume adjustment device, when the actual air volume in the air conditioning flow path member (hereinafter referred to as "actual air volume" where appropriate) is greater than the set air volume, the additional moment of the moment adjustment means is applied in the closing direction. When the actual air volume is smaller than the set air volume, the additional moment of the moment adjustment means is applied in the opening direction. This allows passive control so that the actual air volume does not deviate significantly from the set air volume. Preferably, the total moment in the opening direction and the total moment in the closing direction applied to the rotor include an additional moment by the moment adjusting means.

[0009] Preferably, when the total moment in the opening direction excluding the additional moment by the moment adjustment means and the moment in the closing direction are balanced at the set air volume, the additional moment is 0. In this case, if the actual air volume deviates from the set air volume, the additional moment by the moment adjustment means is applied in a direction that reduces the difference between the actual air volume and the set air volume.

[0010] Preferably, the moment adjustment means includes a balance weight provided on the rotating body. An additional moment is generated according to the rotation angle due to the weight of the balance weight. Preferably, the total moment in the opening direction and the total moment in the closing direction applied to the rotating body include the additional moment due to the balance weight.

[0011] Preferably, the balance weight protrudes from the rotation shaft of the rotor in a direction different from that of the blade. If the blade has a plurality of blade portions protruding from the rotation shaft in different directions from each other, the balance weight preferably protrudes in a direction different from that of any of the plurality of blade portions.

[0012] Preferably, the rotation shaft is horizontal, and the balance weight during balancing stands vertically from the rotation shaft, so that the additional moment due to the balance weight during balancing becomes 0. When the actual air volume deviates from the set air volume, the balance weight tilts, and an additional moment is applied in a direction that reduces the difference between the actual air volume and the set air volume.

[0013] The balance weight may be provided on a portion of the rotor that is disposed inside the flow path, or on a portion that is disposed outside the flow path. In the former case, at least the main part of the air flow control device can be housed inside the air conditioning flow path member. This prevents the air flow control device from getting in the way when installing the air conditioning flow path member, piping, etc. In the latter case, the balance weight can be prevented from being directly subjected to the wind pressure inside the flow path, making it easier to calculate the added moment.

[0014] The present invention also provides an air volume adjustment device provided in an air conditioning flow path member including an air conditioning duct, a chamber, or an air outlet, comprising: a rotor including blades that are rotated to open and close the flow path of the air conditioning flow path member by wind pressure; a balance weight provided on the rotor and configured to generate an additional moment on the rotor according to a rotation angle of the blade; The present invention is characterized by the following. In this other feature, the balance weight preferably protrudes from the rotation axis of the rotor in a direction different from the direction of the blades. Preferably, the rotation axis is horizontal, and the balance weight during balancing stands vertically from the rotation axis. The balance weight may be provided in a portion of the rotor that is disposed inside the flow path or in a portion that is disposed outside the flow path. [Effects of the Invention]

[0015] The air volume adjusting device according to the present invention can automatically adjust the air volume in accordance with the actual air volume or its fluctuations in the air conditioning flow path member, eliminating the need for manual adjustment and eliminating the need for power such as a motor. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a plan view of an air conditioning facility including an air volume control device according to one embodiment of the present invention. [Figure 2(a)] FIG. 2(a) is a cross-sectional view of the air conditioning duct of the air conditioning equipment, showing the air volume regulator in an open position. [Figure 2(b)] FIG. 2(b) is a cross-sectional view of the air conditioning duct showing the air volume regulator in a closed position. [Figure 3] FIG. 3 is a perspective view of the air volume regulator. [Figure 4] FIG. 4 is a front cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a cross-sectional side view of an air conditioning duct including an air volume regulator in a state where the actual air volume is balanced with the set air volume. [Figure 6]FIG. 6 is a cross-sectional side view of an air conditioning duct including an air volume regulator in a state where the actual air volume is greater than the set air volume. [Figure 7] FIG. 7 is a side cross-sectional view of an air conditioning duct including an air volume regulator in a state in which the actual air volume is smaller than the set air volume. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, an air conditioning system 2 is installed in a building 1, such as an office building. The air conditioning system 2 includes air conditioners 3 and distribution means 4. The distribution means 4 includes a branching chamber 5 (air conditioning flow path member) and multiple air conditioning ducts 6 (air conditioning flow path members). The chamber 5 is connected to the air conditioner 3. Multiple air conditioning ducts 6 branch out from the chamber 5 and extend to air outlets 8 (air conditioning flow path members) in each of the air-conditioned areas 7 of the building 1. An air volume adjustment device 10 is installed near the air outlet 8 of each air conditioning duct 6 to reduce variations in the air volume blown out by the air conditioning ducts 6.

[0018] As shown in FIGS. 2(a) and 2(b), the air volume control device 10 includes a rotor 11 and moment adjustment means 20. As shown in FIG. 3, the rotor 11 includes a rotating shaft 12 and blades 13. As shown in FIG. 4, the rotating shaft 12 is oriented in a horizontal direction perpendicular to the flow path direction so as to cross the flow path 6a of the air conditioning duct 6. Both ends of the rotating shaft 12 are supported by the peripheral wall 6b of the air conditioning duct 6. As shown in FIG. 3, the blades 13 are provided on the rotating shaft 12. Therefore, as shown in FIG. 2(a), the blades 13 are interposed within the flow path 6a.

[0019] As shown in Fig. 3, blade 13 has a shape obtained by bending a disk at a substantially right angle along its diameter, for example. More specifically, blade 13 has a pair (or a plurality) of semicircular blade portions 13a, 13b. Blade portions 13a, 13b intersect with each other at a substantially right angle. Rotation shaft 12 is provided along the intersection of blade portions 13a, 13b. Blade portions 13a, 13b protrude from rotation shaft 12 in different directions. The shape of the blades 13 is not limited to this and can be modified in various ways.

[0020] 2(a) and 2(b), the blades 13 rotate about the rotation axis 12 in response to the air pressure in the flow path 6a of the air conditioning duct 6, thereby opening and closing the flow path 6a of the air conditioning duct 6. As shown in FIG. 2(a), when the blades 13 are in the open position, the center line CL between the blade portions 13a and 13b is 13 Although not shown, air volume regulator 10 may be provided with a stopper that prevents blades 13 from rotating further in the open side (clockwise in FIG. 2(a)) than the open position.

[0021] As shown in FIG. 2(b), when the blade 13 is in the closed position, the center line CL between the blade portions 13a and 13b is 13 Although not shown, air volume regulator 10 may be provided with a stopper that prevents blades 13 from rotating further toward the closing side (counterclockwise in FIG. 2(b)) than the closed position.

[0022] 4, the rotating shaft 12 and the blades 13 rotate together relative to the peripheral wall 6b of the air conditioning duct 6. Rotary bearings 14 are provided between both ends of the rotating shaft 12 and the peripheral wall 6b. Alternatively, the rotating shaft 12 may be fixed to the peripheral wall 6 b of the air conditioning duct 6 , and a rotary bearing 14 may be provided between the rotating shaft 12 and the blades 13 , so that the blades 13 rotate relative to the rotating shaft 12 .

[0023] As shown in FIGS. 2 and 3, the air volume control device 10 is provided with a moment adjustment means 20. The moment adjustment means 20 includes a balance weight 21 provided on the rotor 11. The balance weight 21 is provided on a portion 11a of the rotor 11 that is disposed within the flow path 6a. Therefore, the balance weight 21 is disposed within the flow path 6a. The balance weight 21 is formed, for example, in a rod-like or cylindrical shape. The rod-like or cylindrical balance weight 21 protrudes from the rotation axis 12 of the rotor 11 in a direction perpendicular to the rotation axis 12. The protruding direction of the balance weight 21 is different from that of either of the blade portions 13a, 13b of the blade 13. Preferably, as shown in FIG. 4, the balance weight 21 protrudes from the center of the blade 13 in the width direction (the left-right direction in FIG. 4).

[0024] As shown in FIGS. 6 and 7, the moment adjusting means 20 adjusts the additional moment M according to the rotation angle of the blade 13. a As a result, as shown in FIG. 5, a total moment M CW and the total moment in the closing direction M CWW These are set so as to balance when the actual air volume in the air conditioning duct 6 (hereinafter referred to as "actual air volume" where appropriate) is equal to the set air volume.

[0025] Total moment M CW ,M CWW is a moment due to the wind pressure in the flow path 6a that each blade portion 13a, 13b of the blade 13 receives, a moment due to the weight of the blade 13, a friction moment at the rotary bearing 14, a moment due to the wind pressure in the flow path 6a that the balance weight 21 receives, and a moment due to the weight of the balance weight, i.e., an additional moment M a Each moment acts in the opening or closing direction depending on the wind pressure distribution and rotation angle.

[0026] As shown in Figure 5, the total moment M CW ,M CWWWhen the two are balanced (|M CW | = |M CWW |), the balance weight 21 stands vertically from the rotation axis 12. That is, the total moment M CW , M CWW The additional moment M during the balance of the two a is, M a = 0. At this time, the actual air volume q in the air-conditioning duct 6 becomes the set air volume q0 (q = q0). The set air volume q0 is set, for example, within the range of a few discounts to a few increases of the value (Q / n) obtained by dividing the total air volume Q from the air conditioner 3 by the number n of the air-conditioning ducts 6 of the distribution means 4.

[0027] As shown in FIGS. 6 and 7, when the actual air volume q deviates from the set air volume q0, the balance weight 21 tilts, and the additional moment M a by the moment adjustment means 20 is applied in a direction to reduce the difference between the actual air volume q and the set air volume q0. Specifically, as shown in FIG. 6, when the actual air volume q is larger than the set air volume q0 (q>q0), the balance weight 21 tilts to the upstream side of the flow path 6a (the left side in FIG. 6), and the additional moment M a acts to rotate the blade 13 in the closing direction (counterclockwise in FIG. 6). Thereby, the actual air volume q is decreased.

[0028] As shown in FIG. 7, when the actual air volume q is smaller than the set air volume q0 (q<q0), the balance weight 21 tilts to the downstream side of the flow path 6a (the right side in FIG. 7), and the additional moment M a acts to rotate the blade 13 in the opening direction (clockwise in FIG. 7). Thereby, the actual air volume q is increased.

[0029] Thus, according to the air volume adjustment device 10, by automatically adjusting the angle of the blade 13 according to the actual air volume q in the air-conditioning duct 6 or its fluctuation, passive control can be performed so that the actual air volume q does not deviate greatly from the set air volume q0. Therefore, the labor of manual adjustment can be saved. Also, power such as a motor is not required.

[0030] By providing the balance weight 21 to the portion 11a of the rotor 11 that is disposed inside the flow path 6a, at least the main portion of the air volume control device 10 can be housed inside the air conditioning duct 6. This makes it possible to prevent the air volume control device 10 from getting in the way when piping the air conditioning duct 6, etc.

[0031] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the shape of the balance weight 21 is not limited to a rod or a columnar shape, but may be a block shape, a sphere shape, or the like. The end of the rotor 11 may be protruded to the outside of the air conditioning duct 6, and the balance weight 21 may be provided on the protruding portion (the portion disposed outside the flow path 6a). In other words, the moment adjustment means 20 may be provided outside the air conditioning duct 6. In this case, the balance weight 21 can be prevented from being directly subjected to the wind pressure in the flow path 6a, and the additional moment M a This can simplify the calculation of The air volume regulator 10 may be provided in an air conditioning flow path member other than the air conditioning duct 6, such as the chamber 5 or the air outlet 8. The moment adjusting means 20 may include a spring or other elastic member or a damper. [Industrial Applicability]

[0032] The present invention can be applied to air conditioning equipment in buildings such as office buildings and homes. [Explanation of symbols]

[0033] 1. Building 2 Air conditioning equipment 3 Air conditioner 4 Distribution means 5. Chamber (air conditioning flow path component) 6 Air conditioning ducts (air conditioning flow path components) 6a Flow path 6b Surrounding wall 7 Air-conditioned areas 8 Air outlet (air conditioning flow path component) 10 Air volume adjustment device 11 Rotating body 11a: A portion of the rotor disposed within the flow path 12 Rotation axis 13 Feather 13a Upstream blade 13b Downstream blade CL 13 center line 20 Moment adjustment means 21 Balance weight M CW Total opening moment M CWW Total moment in closing direction M a Added moment

Claims

1. An air volume adjusting device provided in an air conditioning flow path member including an air conditioning duct, a chamber, or an air outlet, a rotor including blades that are rotated to open and close the flow path of the air conditioning flow path member by wind pressure; a moment adjusting means for applying an additional moment to the rotor in accordance with the rotation angle of the blades so that a total moment in the opening direction and a total moment in the closing direction applied to the rotor are balanced when the air volume in the air conditioning flow path member is a set air volume; An air volume adjusting device comprising:

2. 2. The air volume regulator according to claim 1, wherein the additional moment is 0 when a total moment in the opening direction excluding the additional moment by the moment adjustment means and the moment in the closing direction are balanced at the set air volume.

3. 2. The air volume regulator according to claim 1, wherein the moment adjustment means includes a balance weight provided on the rotor.

4. The air volume regulator according to claim 3, wherein the balance weight protrudes from the rotation shaft of the rotor in a direction different from that of the blades.

5. 5. The air volume regulator according to claim 4, wherein the rotation shaft is horizontal, and the balance weight stands vertically from the rotation shaft when the balance is in the balanced state.

6. The air volume regulator according to any one of claims 3 to 5, wherein the balance weight is provided on a portion of the rotor that is disposed inside the flow path or on a portion that is disposed outside the flow path.

7. An air volume adjusting device provided in an air conditioning flow path member including an air conditioning duct, a chamber, or an air outlet, a rotor including blades that are rotated to open and close the flow path of the air conditioning flow path member by wind pressure; a balance weight provided on the rotor and configured to generate an additional moment on the rotor according to a rotation angle of the blade; An air volume adjusting device comprising:

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