JP2002332988A - Vortex blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vortex blower capable of providing a large quantity of wind with high pressure and reduced noise. SOLUTION: A part of the wall of a casing of the vortex blower is made of a porous material which air can permeate. As a result, a large quantity of wind can be provided by the vortex blower with reduced noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small vortex blower capable of generating a high static pressure.

[0002]

2. Description of the Related Art A conventional vortex blower of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 54-47114.
The configuration is as shown in FIG. That is, in the figure, a casing 8 having an inlet port 3 for inflowing air, an impeller 2 having a plurality of blades 1 for conveying and boosting the inflowing air during rotation, and discharging air flowing out of the casing 8 An outlet port 6 which is connected to the outlet port 6.
In the vortex blower isolated from the air, the air flowing in from the inlet port 3
, The pressure is gradually increased by the action of the impeller 2 having the plurality of blades 1 and discharged from the outlet port 6. It is said that by such an operation, a vortex blower of this type can obtain a much higher pressure than a general centrifugal blower.

[0003]

However, in the vortex blower having the above-mentioned conventional configuration, there is a problem that the pressure is high, but the noise is high and the air volume is small. The present invention has been made to solve such a conventional problem, and has as its object to provide a vortex blower capable of obtaining a large air volume with low noise.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a casing having an inlet port through which air flows in, and an impeller having a plurality of blades which conveys and pressurizes the flowing air during rotation. An outlet port for discharging air flowing out of the casing, wherein the inlet port is separated from the outlet port by a stripper portion. The vortex blower is formed of a porous material, thereby providing a low-noise and large air volume.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a front view and a cross-sectional view of a vortex blower according to a first embodiment of the present invention, as viewed from the side. In FIG. 1, reference numeral 2 denotes an impeller, which is composed of a plurality of blades 1 and a space 5 between the blades. A flow path 4 is provided between the impeller 2 and a casing 8 that houses the impeller 2.
The casing 8 is provided with an inlet port 3 and an outlet port 6 at a predetermined angle. Also, a stripper section 7 is provided to isolate the inlet port 3 and the outlet port 6 and minimize air leakage.

The casing 8 has both side walls 9 and an outer peripheral wall 10 of the flow path 4, and a region near the inlet port 3 of the both side walls 9 is formed of a porous material 11 through which air can flow. I do. As the porous material 11, a resin sintered material in which resin particles are heated to partially weld resin particles to form continuous pores, a metal sintered material, or the like is suitable.

When the impeller 2 rotates in the direction of arrow a, the air flowing from the inlet port 3 is supplied to the casing 8.
The pressure is gradually increased by the action of the impeller 2 having the plurality of blades 1 while flowing along the flow path 4 inside the
Exhausted from 6. Further, since the inside of the flow path of the porous material 11 has a negative pressure in the vicinity of the inlet port 3, air flows in through the porous material 11, so that the air volume increases and the inflow speed of each part decreases. Therefore, noise can be reduced.

(Embodiment 2) Next, FIG.
This will be described with reference to FIG. In the figure, 2 is an impeller,
It is composed of a plurality of blades 1 and a space 5 between the blades. A flow path 4 is provided between the impeller 2 and a casing 8 accommodating the impeller 2, and the casing 8 is provided with an inlet port 3 and an outlet port 6 at a predetermined angle. Also, a stripper section 7 is provided to isolate the inlet port 3 and the outlet port 6 and minimize air leakage.

The casing 8 has both side walls 9 and an outer peripheral wall 10 of the flow path 4, of which small holes 1 through which air can flow in a region near the inlet port 3 of the both side walls 9.
2 are formed in large numbers. Here, a slit may be formed instead of the small hole 12.

When the impeller 2 rotates in the direction of the arrow a, the air flowing from the inlet port 3 flows into the casing 8.
The pressure is gradually increased by the action of the impeller 2 having the plurality of blades 1 while flowing along the flow path 4 inside the
Exhausted from 6. Further, the inside of the flow passage inside the small hole 12 also has a negative pressure in the vicinity of the inlet port 3, so that the small hole 12
Also, air flows in through the passage, the air volume increases, and the inflow speed of each part decreases, so that noise can be reduced.

(Embodiment 3) Next, FIG.
This will be described with reference to FIG. In the figure, 2 is an impeller,
It is composed of a plurality of blades 1 and a space 5 between the blades. A flow path 4 is provided between the impeller 2 and a casing 8 accommodating the impeller 2, and the casing 8 is provided with an inlet port 3 and an outlet port 6 at a predetermined angle. Also, a stripper section 7 is provided to isolate the inlet port 3 and the outlet port 6 and minimize air leakage.

The casing 8 has both side walls 9 and an outer peripheral wall 10 of the flow path 4, of which the length between the side walls 9 and the impeller 2 in the direction of the impeller rotation axis is increased, and the flow path of the inlet port 3 is increased. The cross-sectional area is larger than that of the outlet port 6.

When the impeller 2 rotates in the direction of the arrow a, the air flowing from the inlet port 3 is supplied to the casing 8.
The pressure is gradually increased by the action of the impeller 2 having the plurality of blades 1 while flowing along the flow path 4 inside the
Exhausted from 6. In addition, the inside of the flow path 4 also includes the inlet port 3.
Since there is a negative pressure in the vicinity, air also flows in from the portion where the flow path cross-sectional area of the inlet port 3 is increased, the air volume increases, and the inflow speed near the inlet port 3 decreases, thus reducing noise. I can do it.

In this embodiment, the casing 8 is provided with the inlet port 3 and the outlet port 6 at a predetermined angle, and the inflow and outflow directions are in the radial direction. It is not affected by angle.

[0016]

As is apparent from the above description, the present invention provides a casing provided with an inlet port through which air flows, an impeller having a plurality of blades which conveys and pressurizes the flowing air during rotation, and the casing described above. An outlet port for discharging air flowing out of the vortex blower, wherein the inlet port is separated from the outlet port by a stripper portion. Vortex blower formed by
Air flows in through the porous material, the air volume increases, and the inflow speed of each part decreases, so that noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view and a cross-sectional view as viewed from a side of a vortex blower according to a first embodiment of the present invention.

FIG. 2 is a front view and a cross-sectional view as viewed from a side of a vortex blower according to a second embodiment of the present invention.

FIG. 3 is a front view, a cross-sectional view as viewed from the side, and an arrow view from the B direction of the vortex blower according to Embodiment 3 of the present invention.

FIG. 4 is a front view and a cross-sectional view as viewed from the side of a conventional vortex blower.

[Explanation of symbols]

 Reference Signs List 1 blade 2 impeller 3 inlet port 4 flow path 5 blade 6 outlet port 7 stripper section 8 casing 9 side wall 10 outer peripheral wall 11 porous material 12 small hole

Claims (5)

[Claims] A casing provided with an inlet port for inflowing air, an impeller having a plurality of blades for conveying and pressurizing the air that has flowed in during rotation, and an outlet port for discharging air flowing out of the casing; In the vortex blower, wherein the inlet port is separated from the outlet port by a stripper portion, a part of the wall of the casing,
An eddy blower characterized by being formed of a porous material through which air can flow. 2. The eddy current according to claim 1, wherein said casing has both side surfaces and an outer peripheral surface, and a part of both side surfaces is formed of a porous material through which air can flow. Blower. 3. A casing having an inlet port for inflowing air, an impeller having a plurality of blades for conveying and pressurizing the inflowing air during rotation, and an outlet port for discharging air flowing out of the casing. A vortex blower, wherein the inlet port is separated from the outlet port by a stripper portion, wherein a plurality of small holes or slits through which air can flow is formed in a part of the wall of the casing. . 4. The casing according to claim 3, wherein said casing comprises both side surfaces and an outer peripheral surface, and small holes or slits through which air can flow are formed in a part of both side surfaces. Whirlpool blower. 5. A casing having an inlet port through which air flows in, an impeller having a plurality of blades that conveys and pressurizes the air that has flowed in during rotation, and an outlet port that discharges air flowing out of the casing, The vortex blower according to claim 1, wherein only the inlet port and a portion near the inlet port of the casing connected to the inlet port have an increased length in the impeller rotation axis direction.