JPH04136451U - Air pressure air volume adjustment damper - Google Patents

Abstract

(57) [Summary] [Objective] To provide a pneumatic air volume adjustment damper 10 that can easily adjust the micro air volume of conditioned air and adjust the micro pressure difference between the upstream side and the downstream side of the pneumatic air volume adjustment damper 10. [Structure] A blade 20 formed of a punched plate is used as a flat blade, and the blade 20 is arranged to close a ventilation system path 12 at a position inclined with respect to the ventilation direction of conditioned air. Furthermore, the upstream and downstream ends 24 and 26 of the blade 20 with respect to the ventilation direction of the conditioned air are bent to provide resistance to the airflow of the conditioned air.
The air volume and pressure difference are changed smoothly in proportion to the opening degree of 0. Further, the midway portion of the ventilation system path 12 is divided at predetermined intervals in the ventilation direction of the conditioned air to form ventilation openings 18, and a blade 20 corresponding to the size of the ventilation opening 18 is attached to each ventilation opening 18. This eliminates the characteristic that the air volume and pressure difference change depending on the number of blades 20.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a pneumatic air volume adjustment damper, especially when the damper is supplied from the air conditioning source of ventilation air conditioning equipment. Equipped with flat blades that adjust the volume of conditioned air and the pressure difference between the upstream and downstream sides. This article relates to a damper for adjusting air pressure and air volume.

0002

[Conventional technology]

Conventionally, this type of air pressure air volume adjustment damper has a damper 1 that is fully adjustable, as shown by the solid line in Figure 4. When damper 1 is fully closed, the air volume of the conditioned air is 100%, as shown by the two-dot chain line. Adjust the rotation angle of the plurality of flat blades 2, 2... in order to make the air volume of the conditioned air 0%, In addition, the pressure difference between the upstream and downstream sides of the damper 1 can be adjusted by changing the rotation angle of the blades 2, 2... Adjust and do it.

0003 The blades 2, 2... are arranged in a direction perpendicular to the ventilation system path 3 of the conditioned air. Both are rotatably connected by a rotating shaft 4 connected to a drive source (not shown). .

0004

[Problem that the idea aims to solve]

However, in the conventional air pressure air volume adjustment damper 1, as shown in FIG. When the opening degree is from 50% to 70%, a slight rotation of the blade 2 causes the upstream and downstream sides of the damper 1 to The disadvantage is that it is difficult to make fine adjustments to the differential pressure because the pressure difference between the two sides changes rapidly. be.

[0005] In addition, as shown in FIG. %, it is difficult to finely adjust the air volume of the conditioned air. This invention was developed in view of these circumstances, and it Air pressure that allows you to easily fine-tune the air pressure difference between the side and downstream sides and the air volume of the conditioned air. The purpose is to provide an air volume adjustment damper.

[0006]

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the present invention aims to provide air that is supplied from the air conditioning source of ventilation air conditioning equipment. It is rotatably installed in the ventilation system path of the conditioned air, and controls the air volume of the conditioned air and its upstream and downstream sides. In the air pressure air volume adjustment damper equipped with flat blades that adjust the air pressure difference on the downstream side, The flat blade is composed of a punching plate with many holes formed on its surface. At the same time, the ventilation system path is closed at a position inclined to the ventilation direction of the conditioned air. It is characterized by

[0007]

[Effect]

According to the present invention, a punching plate is used as the flat blade, and the blade is The roots close the ventilation system path at an angle to the ventilation direction of the conditioned air. This results in , even if the blade rotates slightly, the pressure difference does not change suddenly, and the air pressure changes relative to the amount of rotation of the blade. Since the difference and air volume become proportional, the upstream and downstream sides of the air pressure air volume adjustment damper It is possible to easily finely adjust the air pressure difference between the sides and the air volume of the conditioned air.

[0008] In addition, the upstream and downstream ends of the blades in the ventilation direction are bent to provide air conditioning. By providing resistance to the airflow, the air volume can be smoothly changed in proportion to the opening of the blades. can be made into Furthermore, the midway part of the ventilation system path is divided at predetermined intervals in the ventilation direction of the conditioned air to reduce ventilation. By forming an opening and arranging a blade for each ventilation opening, the number and size of the blades can be reduced. It is possible to eliminate the characteristic that the air volume and pressure difference change depending on the height.

[0009]

【Example】

The following is a preferred embodiment of the air pressure air volume adjusting damper according to the present invention according to the attached drawings. I will explain in detail later. FIG. 1 shows a pneumatic air volume adjustment damper 10 according to the present invention placed on a ventilation system path 12 for conditioned air. An embodiment in which the lower flanges 14, 14, etc. are installed in the orthogonal direction is shown. There is.

0010 The air pressure air volume adjusting damper 10 controls air conditioning air by three partition plates 16, 16... The ventilation openings 18, 18, . . . are formed by dividing into four parts in the ventilation direction. Each ventilation opening 18 In each case, a flat blade 20 corresponding to the size of the ventilation opening 18 is connected to a rotating shaft 22. It is mounted so that it can rotate freely in the direction of the arrow in the figure. The rotation shaft 22 has a rotation axis (not shown). It is connected to a dynamic drive source, and the driving force from the rotation drive source is transmitted.

[0011] The blade 20 is formed by a punching plate having a large number of holes formed on its surface. It consists of Further, when the blade 20 is closed, that is, when the blade 20 rotates, the blade 20 passes through. When the air outlet 18 is closed, the direction of ventilation of the conditioned air is as shown by the solid line in the figure. It is formed in a size that closes the ventilation opening 18 at the inclined position. Furthermore, the blade 20, that is, the upstream and downstream ends 24 and 26 with respect to the ventilation direction, are rotated counterclockwise. It is bent 90 degrees to the opposite side.

0012 Next, the operation of the air pressure air volume adjusting damper constructed as described above will be explained. First, in order to set the opening degree of the air pressure air volume adjustment damper 10 to 100%, each blade 20, 2 0... to the position indicated by the two-dot chain line in the figure, and air-conditioned air is removed from the upstream side of the ventilation system path 12. flow downstream. In addition, in order to set the opening degree of the air pressure air volume adjustment damper 10 to 0%, each of the above-mentioned Rotate the blades 20, 20 counterclockwise in the figure to the position shown by the solid line, that is, the position of the conditioned air. Move to a position inclined to the direction of ventilation. In addition, in this embodiment, the rotation of the blade 20 The range is from 0° to 45°, but if it is less than 90°, set the angle accordingly. Also good.

[0013] Next, the pressure difference (differential pressure) between the upstream side and the downstream side of the air pressure air volume adjustment damper 10 is shown in Figure 2. show. In Figure 2, the vertical axis shows the differential pressure between the upstream side and the downstream side, and the horizontal axis shows the impeller pressure. 20 openings are shown. According to FIG. 2, the opening degree of the blade 20 is from 0% to 100%. As the pressure changes, the differential pressure decreases in accordance with the opening degree of the blades 20. Difference between when the opening degree of the blade 20 is 0% and when the opening degree of the conventional air pressure air volume adjustment damper is 0%. The reason why the pressure is low compared to the pressure (see Fig. 5) is that the blade 20 is formed by the punching plate. This is because the conditioned air passes through it. Also, the opening degree of the blade 20 is 1 00%, compared to the differential pressure when the opening degree of the conventional air pressure air volume adjustment damper is 100%. The reason for this is that the ends 24 and 26 of the blade 20 are bent 90 degrees to accommodate the airflow of the conditioned air. This is because it provides resistance.

[0014] Therefore, the differential pressure between the upstream side and the downstream side of the air pressure air volume adjustment damper 10 is as shown in FIG. It becomes proportional to the opening degree of the blade 20. As a result, in this example, the blade Compared to conventional air pressure air volume adjustment dampers, where the differential pressure changes rapidly with the slightest rotation of the Fine adjustment of differential pressure can be easily performed. Next, FIG. 3 shows how the air volume of the conditioned air is adjusted by the air pressure air volume adjustment damper 10. figure 3, the vertical axis shows the air volume of air conditioned air flowing downstream from the air pressure air volume adjustment damper 10. The opening degree of the blade 20 is shown on the horizontal axis.

[0015] When the opening degree of the blade 20 is 0%, the air volume does not become 0 because the blade 20 is punched. This is because it is made up of plates. As a result, the air volume relative to the opening degree of the blades 20 is Since the change becomes smooth, the air volume becomes proportional to the opening degree of the blades 20. Therefore, in this example, compared to the conventional air pressure air volume adjustment damper, fine adjustment of the air volume is possible. It can be done easily.

[0016] In addition, in this embodiment, the ventilation system path 12 is divided by the partition plates 16, 16, . . . A rectifying effect of the conditioned air in the entire system 12 can be obtained. This allows the feather To eliminate the characteristic that the air volume and pressure difference change depending on the number and size of the roots 20. I can do that.

[0017]

[Effect of the idea]

As explained above, according to the air pressure air volume adjustment damper according to the present invention, the flat blades The blades are used as a punching plate, and the ventilation system is installed at an angle to the ventilation direction. Since the passage is closed, the pressure difference will not change suddenly even if the blade rotates slightly. The pressure difference and the air volume become proportional to the amount of rotation of the damper. Therefore, mind Easily fine-tune the air pressure difference between the upstream and downstream sides of the pressure air volume adjustment damper and the air volume of the conditioned air. can do.

[Brief explanation of drawings]

[Fig. 1] A sectional view showing an embodiment of the air pressure air volume adjustment damper according to the present invention.

[Fig. 2] An explanatory diagram showing the air pressure difference adjustment performed using the air pressure air volume adjustment damper according to the present invention.

[Fig. 3] Explanatory diagram showing air volume adjustment performed using the air pressure air volume adjustment damper according to the present invention

[Fig. 4] Cross-sectional view showing an example of a conventional air pressure air volume adjustment damper

[Fig. 5] Explanatory diagram of air pressure difference adjustment performed using a conventional air pressure air volume adjustment damper

[Figure 6] Explanatory diagram showing air volume adjustment performed using a conventional air pressure air volume adjustment damper

[Explanation of symbols]

10...Air pressure air volume adjustment damper 12...Ventilation system path 16...Partition plate 18...ventilation opening 20...feather 24, 26... end

Claims (3)

[Scope of utility model registration request] Claim 1: A flat plate that is rotatably provided in a ventilation system path for conditioned air supplied from an air conditioning source of ventilation air conditioning equipment, and that adjusts the air volume of the conditioned air and the pressure difference between its upstream and downstream sides. In the air pressure air volume adjustment damper equipped with blade-like blades, the flat blade is composed of a punching plate with a large number of holes formed on its surface, and is arranged at a position inclined with respect to the ventilation direction of the conditioned air. A pressure air volume adjustment damper characterized by closing a ventilation system path. 2. The air pressure air volume adjustment according to claim 1, wherein the upstream and downstream ends of the blades with respect to the ventilation direction of the conditioned air are bent so as to provide resistance to the airflow of the conditioned air. damper. 3. A midway portion of the ventilation system path is divided at predetermined intervals in the ventilation direction of the conditioned air to form a plurality of ventilation openings, and a blade according to the size of the ventilation opening is rotated for each ventilation opening. The air pressure air volume adjusting damper according to claim 1, wherein the damper is movably mounted.