JPS6030550Y2 - soundproof box - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a soundproof box that houses an air compressor or the like therein and prevents operating noise generated by the air compressor from leaking outside.

As shown in FIGS. 1 and 2, a device mounting chamber 2 is formed in a soundproof box 1, and a device mounting chamber 2 is provided in a soundproof box 1. The supported air compressor 4 is housed in the chamber 2, and a multi-blade fan 6 is attached to the crankshaft 5 of the compressor 4. The compressor 4 faces the passage 9 that communicates with the utility room 8.
The fan 6 is actuated by the rotation of the crankshaft 5 which rotates with the operation of the motor 10, and external air is sucked into the chamber 2 through the opening lower, the chamber 8 and the passage 9, and the sucked air is compressed. A soundproof box 1 has been proposed which cools the compressor 4, discharges the cooled air from the exhaust passage 11 and the outlet 12, and prevents the operating noise generated by the operation of the compressor 4 from leaking to the outside. ing.

In such a soundproof box, the noise inside the room 2 is directly propagated to the outside through the passage 9 and the room 8, so there is a drawback that the noise is large. If there is resistance that obstructs the airflow, the airflow will be uneven and the fan performance will not be fully demonstrated.

In order to optimize the cooling air flow in the chamber 2 for cooling the compressor 4, the rotation axis 13 of the fan 6 is set to the center 14 of the chamber 8.
It has also been proposed to displace the

By the way, if the fan 6 and the passage 9 are installed and formed by displacing the axis 13 with respect to the center 14 of the chamber 8 in this way, the amount of air sucked in in the passage 9 becomes uneven, and the fan While reducing the ventilation performance, it also generates noise due to the non-uniformity of the intake air amount, which causes the soundproof box 1
The effect of providing this will be reduced.

The present invention has been devised in view of the above points, and its purpose is to provide a soundproof box that can provide substantial soundproofing without reducing ventilation performance or cooling performance.

Next, a preferred specific example of the present invention will be explained based on the drawings.

In FIGS. 3 and 4, the air suction chamber 8 having an open lower air suction phase on the side is separated by a partition wall 31 into chambers 32 and 33.
It is divided into.

The opening lower and passage 9 are communicated through chambers 32 and 33.

The device mounting chamber 2 formed by the cylindrical soundproof box 1 houses, for example, an air compressor 4, as described above.
A multi-blade fan 6 is attached to the crankshaft 5 of the compressor 4.

The fan 6 sucks air from the outside through the chambers 32 and 33 into the chamber 2 and creates an appropriate flow for the sucked air.

The rotation axis 13 of the fan 6 is displaced with respect to the center 14 of the chamber 8, so that the air in the chamber 2 can be flowed in an optimal manner to cool the compressor 4, and then as before. It is discharged from the discharge passage 11 and the outlet 12.

In the soundproof box 1 configured in this manner, the air in the chambers 32 and 33 is rectified by the partition wall 31 and flows uniformly into the passage 9, so that the amount of air sucked into the chamber 2 by the fan 6 can be increased. I can do it.

According to experiments, it has been found that this specific example can increase the air volume by 10 to 20% compared to the case where the partition wall 31 is not provided.

On the other hand, the operating noise of the compressor 4 and the fan 6 can be attenuated or reduced because the partition wall 31 divides the operating noise and the air in the chambers 32 and 33 uniformly flows into the passage 9.
As a result, the noise leaking outside the soundproof box 1 can be reduced.

According to experiments, compared to the case where the partition wall 31 is not provided, 1
It was found that a reduction of ~3 dB (A) can be obtained.

By the way, as shown in FIG. 5, the partition wall 31 may extend into the space 51 surrounded by the blades of the fan 6. In this way, the external noise can be further reduced by about 1 to 2 dB (A). It is possible.

In addition, as shown in FIG. 6, when two air suction volume lowers communicating the chamber 8 with the outside are provided on the side of the soundproof box 1, the two open lowers are divided into two parts corresponding to each other. It is preferable to provide the partition wall 63 so that two chambers 61 and 62 are formed.

The above is a specific example in which a partition wall is provided on the air intake side, but by providing a partition wall in the exhaust passage 11 to divide the exhaust passage 11, the exhaust air flow is made uniform, the exhaust resistance is reduced, and the fan 6 is substantially It may be possible to increase the scenery.

In addition, although the said specific example demonstrated the soundproof box equipped with the air compressor in the chamber 2, this invention is not limited to this, but can be applied to the soundproof box equipped with any other device.

As described above, according to the present invention, it is possible to further attenuate the sound generated from the equipment installed in the equipment installation room, and it is also possible to reduce the sound generated by the ventilation fan, thereby improving the original characteristics of the soundproof box. It can be fully demonstrated.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the proposed soundproof box, and Figure 2 is a cross-sectional view of the proposed soundproof box.
3 is a sectional view of a preferred embodiment of the present invention, FIG. 4 is a sectional view taken along IV-IV of FIG. 3, and FIGS. FIG. 1...Soundproof box, 2...Device installation room, 6
...Multi-blade fan, fan...Air intake chamber.

Claims (1)

[Scope of utility model registration request] An air suction chamber having an air suction opening on a side surface, a device mounting chamber communicated with the air suction chamber via a passage, and an air suction chamber provided in the passage for sucking air from the air suction chamber into the device mounting chamber. A soundproof box comprising a fan and a soundproof box in which a partition wall is provided in the air suction chamber so that the air suction opening and the passage communicate with each other through a plurality of divided chambers.