JPH1073304A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a lower cost with a lighter weight and higher workability by shortening the length of the body of a blower in the blower for discharging air in a room outside. SOLUTION: A suction side silencing connection port 6 is provided on the suction side of the body 4 of a blower equipped with a sirocco type fan motor 3 having a box shaped double suction type fan casing 2 thereinside and with a delivery side connection port 8 on the delivery side, silencing materials 1 and 5 are provided on the internal surfaces of the body 4 of the blower and the suction side silencing connection port 6 to enhance a silencing effect with the suction side silencing connection port 6. This can shorten the length of the body 4 of the blower and produces a blower which can lower cost with a lighter weight and higher workability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower installed behind a ceiling for sucking contaminated air or the like in a room and discharging the air outside the room.

[0002]

2. Description of the Related Art Conventionally, a blower of this type has been known as shown in FIGS. Hereinafter, the blower will be described with reference to FIGS. 6 and 7.

[0003] As shown in the figure, a sirocco type fan motor 103 having a box-like shape provided with a silencing material 101 on the inner surface and having a double suction type fan casing 102 therein is provided.
04, the suction side connection port 105 is provided on the suction side,
On the discharge side, the discharge port 1 of the double suction type fan casing 102
06, a discharge-side connection port 107 communicating with the suction-side connection port 10 is provided.
5 is connected to a suction side duct 110 communicating with the room 109, and the discharge side connection port 107 is connected to a discharge side duct 112 communicating with the outside 111.

[0004] By driving the sirocco fan motor 103, air in the room 109 is sucked into the blower main body 104 via the suction duct 110, and is connected to the discharge side connection port 107 by the sirocco fan motor 103. It was discharged to the outside 111 via the discharge side duct 112.

On the other hand, the noise generated by the sirocco type fan motor 103 is reduced by the sound deadening material 101 provided on the inner surface of the blower main body 104,
The noise transmitted through 10 was mitigated.

[0006]

In such a conventional blower, it is necessary to increase the length of the blower main body 104 provided with the sound deadening material 101 in order to enhance the sound deadening effect. There is a problem that the cost is high and the cost is high. Therefore, it is required that the blower main body 104 has a short length, a light weight, good workability, and a low cost.

[0007] Further, there is a problem that the air volume decreases, noise is generated, and efficiency is deteriorated due to a sudden expansion of the ventilation path from the suction side connection port 105 to the blower main body 104. There is a demand for a blower that can prevent a sudden increase in the ventilation path toward the wind and prevent a decrease in air volume, noise generation, and efficiency deterioration.

The present invention solves the above-mentioned conventional problems. The length of the blower body is short, the weight is low, the workability is good, the cost can be reduced, and the air volume is reduced, noise is generated, and the like. It is an object of the present invention to provide a blower that can prevent the occurrence of deterioration in efficiency.

[0009]

In order to achieve the above object, the blower of the present invention has a sound deadening material provided on the inner surface of the blower main body and the suction side sound deadening connection port.

According to the present invention, there can be provided a blower which can be formed to have a reduced length, has a light weight, has good workability, and can be manufactured at a low cost.

Another means is that the suction side connection port is formed by an inclined surface which gradually increases in diameter toward the inner surface of the blower main body, and is provided with a sound deadening material.

According to the present invention, it is possible to obtain a blower capable of preventing a reduction in air volume, generation of noise and deterioration of efficiency.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a blower main body provided with a sirocco fan motor having a box-like shape and a double suction type fan casing therein, a suction-side silencing connection port provided on the suction side of the blower main body. A discharge side connection port provided on the discharge side of the blower main body so as to communicate with a discharge port of the two suction fan casings, and a silencer provided on an inner surface of the blower main body and a suction side silence connection port. The noise generated by the sirocco type fan motor is reduced by the noise reduction material provided on the inner surface of the suction side noise reduction connection port in addition to the noise reduction material provided on the inner surface of the blower main body. This has the effect of being lightweight and improving workability.

Further, the suction-side silencing connection port is formed by an inclined surface which gradually increases in diameter toward the inner surface of the blower main body, and is smoothly inserted into the blower main body along the inclined surface of the air sucked from the suction-side silencing connection port. Inhalation, reduction of air volume and generation of noise are achieved, and the effect is that the efficiency can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0016]

【Example】

(Embodiment 1) As shown in FIGS. 1 and 2, a fan is provided with a sirocco type fan motor 3 having a box shape having a sound absorbing material 1 made of glass wool or the like on its inner surface and having a double suction type fan casing 2 inside. A main body 4 is formed, a suction-side silencing connection port 6 having a silencing material 5 provided on an inner surface is provided on a suction side of the blower main body 4, and a discharge port 7 of the double suction type fan casing 2 is provided on a discharge side.
The discharge side connection port 8 is provided so as to communicate with the
The suction side silence connection 6 is connected to a suction side duct 11 communicating with the room 10, and the discharge side connection 8 is connected to a discharge side duct 13 communicating with the outside 12. It is composed.

In the above configuration, when the sirocco fan motor 3 is operated, the air in the room 10 is sucked into the suction duct 11.
The air sucked into the blower main body 4 through both sides of the suction type fan casing 2 into the sirocco type fan motor 3 through the discharge side connection port 8 discharges the discharge side duct 13.
And is discharged to the outside 12 through

In the process of transmitting the noise generated by the sirocco type fan motor 3 to the room 10, the noise is first reduced by the sound deadening material 1 provided on the inner surface of the blower main body 4, and further provided on the inner surface of the suction side sound deadening connection port 6. The sound is reduced by the noise reduction material 5 and transmitted to the room 10 through the suction side duct 11, and the noise reduction effect is increased by the amount reduced by the noise reduction material 5 provided at the suction side noise reduction connection port 6. 4, it is possible to reduce the noise reduction material 1 provided in the blower 4, and it is possible to shorten the entire length of the blower main body 4,
By shortening the weight, the weight is reduced, the workability is improved, and the cost is reduced.

(Embodiment 2) As shown in FIG. 3, the suction-side silencing connection port 6A is formed by an inclined surface 14 having a diameter gradually increasing toward the inner surface of the blower main body 4A, and a silencing material 5A is provided on the inner surface. .

In the above configuration, when the sirocco fan motor 3 is operated, the air sucked into the suction-side silencing connection port 6A causes the inclined surface 14 forming the suction-side silencing connection port 6A to be formed.
The air flows into the blower body 4A sequentially while flowing along, and is sucked into the sirocco-type fan motor 3 from both sides of the two suction-type fan casings 2, and is discharged from the discharge-side connection port 8, and from the suction-side silence connection port 6A. The flow of the air flowing into the inside becomes smooth, the air flow is reduced, and the generation of noise is prevented, so that the efficiency is improved.

In the process of transmitting the noise generated by the sirocco type fan motor 3 to the room, first, the noise is reduced by the silencer 1 provided on the inner surface of the blower body 4A.
Further, by forming the suction-side silencing connection port 6A with an inclined surface 14 having a diameter gradually increasing toward the inner surface of the blower main body 4A,
The effective area of the silencing material 5A is increased as compared with the case of forming the same diameter, and the silencing effect is further enhanced.

(Embodiment 3) As shown in FIG. 4, a cross section is substantially the same as that of the blower main body 4A, and a silencer 15 is provided on the inner surface.
One has a suction side connection port 16 and the other is a blower main body 4A.
And a silencer 17 connected to the suction side of.

In the above configuration, when the sirocco type fan motor 3 is operated, the air on the indoor side is sucked from the suction side connection port 16 provided in the silencer 17 and passes through the silencer 17 to the blower main body 4A through the suction side silence connection port 6A.
The air sucked into the inside and sucked into the sirocco type fan motor 3 from both sides of the two suction type fan casings 2 is discharged to the outside of the room from the discharge side connection port 8.

On the other hand, in the process of transmitting the noise generated by the sirocco fan motor 3 to the indoor side, first,
After the sound is reduced by the sound deadening material 1 provided on the inner surface of the blower main body 4A, when the sound passing through the suction side sound deadening connection port 6A, the sound deadening material 5
The sound is reduced by A, and the silencing material 15 of the silencer 17 is further reduced.
As a result, the overall length is substantially equal to that of the conventional example, but the noise can be reduced as compared with the conventional example.

Although the third embodiment has been described using the blower of the second embodiment, it goes without saying that the same effect can be obtained by using the blower of the first embodiment.

(Embodiment 4) As shown in FIG. 5, a silencer 18 is provided on the outer surface of a double suction fan casing 2A.

In the above configuration, the air is discharged from the indoor side by the same operation as in the first embodiment.

On the other hand, the noise generated by the sirocco type fan motor 3 is reduced by the noise reduction material 1 provided on the inner surface of the blower main body 4, and then reduced by the noise reduction material 18 provided on the both suction type fan casings 2A. Further, the sound is reduced by the sound deadening material 5 provided on the inner surface of the suction side sound deadening connection port 6 and transmitted to the indoor side, so that the sound deadening effect is further enhanced as compared with the first embodiment, and the overall length of the blower body 4 is further shortened. Can be done.

Although the fourth embodiment has been described using the blower of the first embodiment, the blower of the second or third embodiment may be used, and the operation and effect thereof do not differ.

[0030]

As is clear from the above embodiments, according to the present invention, it is possible to provide a blower that has a short length, is lightweight, has good workability, and can be manufactured at low cost.

Further, it is possible to provide a blower capable of preventing a reduction in air volume, noise generation and efficiency deterioration.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a blower according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing an installation state of the blower.

FIG. 3 is a cross-sectional view illustrating a configuration of a blower according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a configuration of a blower according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a configuration of a blower according to a fourth embodiment of the present invention.

FIG. 6 is a sectional view showing the configuration of a conventional blower.

FIG. 7 is a schematic diagram showing an installation state of the blower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Silencer 2 Double suction fan casing 2A Double suction fan casing 3 Sirocco fan motor 4 Blower body 4A Blower body 5 Silencer 5A Silencer 6 Suction side silence connection port 6A Suction side silence connection port 7 Discharge port 8 Discharge side Connection port 14 Inclined surface 15 Sound deadening material 16 Suction side connection port 17 Silencer 18 Sound deadening material

Claims (4)

[Claims] 1. A blower body provided with a sirocco fan motor having a box-like shape and having both suction-type fan casings therein, a suction-side silencing connection port provided on a suction side of the blower body, and a discharge of the blower body A blower provided with a discharge-side connection port provided in communication with a discharge port of the suction-type fan casing on a side thereof, and a muffler provided on inner surfaces of the blower main body and the suction-side muffler connection port. 2. The blower according to claim 1, wherein the suction-side silencing connection port is formed by an inclined surface that gradually increases in diameter toward the inner surface of the blower body. 3. A blower body having substantially the same cross section as the blower body, a silencer provided on an inner surface, a suction port connection port on one side, and a silencer connected to the suction side of the blower body on the other side. Or the blower according to 2. 4. The blower according to claim 1, wherein a muffling material is provided on an outer surface of each of the two suction fan casings.