JP2582217B2 - Sound reduction distributor for high-speed duct - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reducing distributor for a high-speed duct used in a building air conditioner or an industrial air conditioner.

[0002]

2. Description of the Related Art As a duct, there is a so-called low-speed duct in which an air conveying speed is suppressed to a constant value. In a low-speed duct, the air conveyance speed is set to a certain value or less in consideration of duct strength, vibration, leakage, air resistance, and the like. Therefore, when a low-speed duct is used, in a clean room or an industrial building in which the amount of air to be conveyed increases due to dust removal or heat generation, the cross-sectional shape of the main duct and the like is increased to secure the amount of air to be conveyed. In addition, there is a so-called high-speed duct in which the air conveying speed is higher than that of the low-speed duct, and the high-speed duct has a small cross-sectional shape and can secure the same amount of conveying air as the low-speed duct. As the high-speed duct, for example, a spiral duct or the like having higher strength and less vibration than square ducts is used.

[0003]

However, when a low-speed duct is employed, the cross-sectional shape of the main duct becomes large as the amount of air to be conveyed increases, so that a large space above the ceiling, which is a duct storage space, must be secured. There was a drawback that the floor height of the building was high. In addition, the low-speed duct has a drawback that the workability is poor and the manufacturing cost increases because the duct is large. On the other hand, when a high-speed duct is adopted, the same amount of conveying air as a low-speed duct can be secured with a small cross-sectional shape, and the duct storage space is reduced, but the high air conveying speed increases the air friction resistance and increases the transfer power. However, there is a disadvantage that energy consumption is increased. Further, in the high-speed duct, there is a problem that noise is increased due to air friction resistance. The present invention has been made in view of the above circumstances, and a high-speed duct can be used for a main duct having a large cross-sectional shape to reduce the cross-sectional shape, and a low-speed duct that does not generate noise can be used for a branch duct. An object of the present invention is to provide a sound reduction distributor for high-speed ducts, thereby improving workability, reducing manufacturing costs, and preventing noise generation.

[0004]

According to the present invention, there is provided a sound-reducing distributor for a high-speed duct according to the present invention, wherein one side of a box-shaped distributor body is communicated with the inside of the distributor body. A gap communicating with the high-speed duct connection port between the high-speed duct connection port and the inner wall of the distributor main body. An inner box is provided inside the distributor body so that a hole is formed, a low-speed duct connection port is communicated only with the inside of the inner box, and a plurality of holes are formed to communicate the gap and the inside of the inner box. A part of the inner box is formed by a plate.

[0005]

[Function] When high-speed air flows into the distributor body from the high-speed duct connection port, the air is distributed to the gap, passes through the perforated plate, flows into the inner box, and collides with each other in the inner box, thereby silencing the sound. Then, the pressure is equalized and flows uniformly into the low-speed duct connection port. At this time, the area of the low-speed duct connection port is
Since the area is larger than the area of the high-speed duct connection port, the air velocity of the low-speed duct connection port becomes low, and noise is hardly generated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the sound reducing distributor for high-speed ducts according to the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of the sound reducing distributor for high-speed duct of the present invention, FIG. 2 is a transverse sectional view of the sound reducing distributor for high-speed duct, and FIG. 3 is a perspective view of the sound reducing distributor for high-speed duct. As shown in FIG.
Is formed in a box shape, and the distributor main body 1 is made of, for example, a zinc iron plate. A high-speed duct connection port 5 is provided on one side surface 3 of the distributor main body 1, and the high-speed duct connection port 5 communicates with the inside of the distributor main body 1. A pair of low-speed duct connection ports 7a and 7b and a pair of low-speed duct connection ports 9 are provided on a pair of other side faces 7 and 9 (see FIG.
a, 9b are provided, and the low-speed duct connection ports 7a, 7b, 9 are provided.
The total cross-sectional area of a and 9b is larger than the cross-sectional area of the high-speed duct connection port 5.

As shown in FIG. 1, an inner box 11 is provided inside the distributor body 1, and an upper surface 11a and a lower surface 1 of the inner box 11 are provided.
1b and a gap 1 serving as an air passage between the inner wall of the distributor body 1
3 and 15 are formed. Further, low-speed duct connection ports 7a, 7b, 9a, 9b are opened inside the inner box 11, and the low-speed duct connection ports 7a, 7b, 9a, 9b communicate with only the inside of the inner box 11.

The upper surface 11a and the lower surface 1 of the inner box 11
A punching metal (perforated plate) 17 having a large number of holes is attached to 1b, and the punching metal 17 communicates the gaps 13 and 15 with the inside of the inner box 11. That is,
The air in the gaps 13 and 15 flows into the inner box 11 via the punching metal 17. The air in the gaps 13 and 15 flows into the inner box 11 through the punching metal 17 to be in a uniform pressure state in the inner box 11 and is uniformly distributed to the low-speed duct connection ports 7a, 7b, 9a and 9b. (See FIG. 2). Further, glass wool 19 is stretched on the inner wall of the distributor main body 1, and the glass wool 19 blocks noise caused by an air flow from the high-speed duct connection port 5 from leaking out of the distributor main body 1. Distributor body 1, high-speed duct connection port 5, low-speed duct connection port 7a,
The 7b, 9a, 9b, the inner box 11, and the punching metal 17 are used as main members to constitute a high-speed duct sound reducing distributor 21.

[0009] In the high-speed duct sound reducing distributor 21 configured as described above, when high-speed air flows into the distributor main body 1 from the high-speed duct connection port 5, the air flows into the upper surface 11 a and the lower surface 11 b of the inner box 11. It is equally divided into the gaps 13 and 15, passes through the punching metal 17, and flows into the inner box 11. The air that has flowed into the inner box 11 after passing through the punching metal 17 on the upper surface 11a and the lower surface 11b is silenced and equalized by colliding with each other in the inner box 11, and the low-speed duct connection ports 7a, 7b, 9a. , 9b. In addition, since the total cross-sectional area of the low-speed duct connection port is larger than the cross-sectional area of the high-speed duct connection port 5, the air flow velocity from each low-speed duct connection port is lower than that of the high-speed duct connection port 5 and noise is reduced. Is less likely to occur.

FIG. 4 is a perspective view of a duct system using a high-speed duct sound reducing distributor, and FIG. 5 is a perspective view of a duct system using only a low-speed duct. As shown in FIG. 4, if the high-speed duct sound reducing distributor 21 is used, the main duct is the high-speed duct 23, and the low-speed duct 25 is connected via the high-speed duct sound reducing distributor 27 particularly in a portion where noise is to be prevented. As shown in FIG. 5, compared with the case where all the other branch ducts 29 and 30 including the main duct 27 are low-speed ducts, the duct storage space in the ceiling can be reduced, and beam penetration and the like can be performed. When the occurrence occurs, the construction is extremely easy. Further, in such a duct system, only the main duct becomes the high-speed duct 23 (see FIG. 4). However, the main duct having a larger cross-sectional shape than the branch duct has a relatively high pressure loss even at a high wind speed. On the other hand, the branch duct having a small cross-sectional shape has a low wind speed, and the reduction rate of the pressure loss becomes large, so that there is an advantage that the noise is largely reduced.

[0011]

As described above in detail, according to the sound reducing distributor for a high-speed duct according to the present invention, the high-speed air from the high-speed duct connection port is silenced, and the muffled air is supplied to the low-speed duct connection port. Since the distribution is evenly distributed, high-speed ducts can be used for main ducts with large cross-sectional shapes, and low-speed ducts can be used for branch ducts with small cross-sectional shapes. A low-speed duct that does not generate noise can be used for the duct. As a result, it is possible to improve workability, reduce manufacturing costs, and prevent noise generation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a sound reducing distributor for a high-speed duct according to the present invention.

FIG. 2 is a cross-sectional view of the high-speed duct sound reducing distributor according to the present invention.

FIG. 3 is a perspective view of a sound reducing distributor for a high-speed duct according to the present invention.

FIG. 4 is a perspective view of a duct system using a high-speed duct sound reducing distributor.

FIG. 5 is a perspective view of a duct system using only low-speed ducts.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Distributor main body 3 One side 5 High-speed duct connection port 7, 9 Other side 7a, 7b, 9a, 9b Low-speed duct connection port 11 Inner box 13, 15 Gap 17 Perforated plate 21 Sound reduction distributor for high-speed duct

Claims (1)

(57) [Claims] 1. A high-speed duct connection port communicating with the inside of the distributor main body is provided on one side surface of the box-shaped distributor main body, and on a pair of other side surfaces of the distributor main body adjacent to and opposed to the one side surface. A low-speed duct connection port, an inner box is provided inside the distributor body such that a gap communicating with the high-speed duct connection port is formed between the low-speed duct connection port and the inner wall of the distributor body; For a high-speed duct, wherein a part of the inner box is formed by a perforated plate having a plurality of holes formed therein, which communicates only with the inside of the inner box, and a plurality of holes communicating the gap and the inside of the inner box. Sound reduction distributor.