KR20090118821A - Blowing device - Google Patents

Abstract

PURPOSE: A blowing device is provided to solve the discontinuity of airflow between a bell mouth and an impeller by arranging a motor between the impeller and the blowing device. CONSTITUTION: A blowing device comprises an impeller(1) and a motor. A bell mouth is integrated with the impeller. The bell mouth absorbs the air. The motor rotates the impeller. The motor includes a hook-shaped rotor(3) fixed on the impeller. The motor comprises a hook-shaped stator(4) fixed on the frame. A bearing(5) is arranged between the impeller and the fixed end(7). The impeller rotates inside the fixed end due the bearing.

Description

Blower {BLOWING DEVICE}

The present invention relates to a blower as an apparatus for blowing, or a blower incorporated in a part of the apparatus as a blower.

In the past, most of the blower devices have a configuration in which a motor is disposed in the center of the impeller. In the blower having such a structure, a portion for accommodating the motor exists in the impeller, and the portion of the blower has a resistance of the fluid flowing therein, and the efficiency of the blower is reduced. In addition, although the inflow resistance can be reduced by miniaturizing the projection area seen from the blowing direction of the motor housing portion, the height of the entire apparatus is increased as a result.

Thus, there exists a difficulty in making both the thinning of the whole apparatus and the efficiency of a blower apparatus compatible. In addition, a gap cannot be avoided between the rotating impeller and the bell mouse fixed to the device frame. Therefore, there existed a ventilation leak from the inside of the apparatus to the suction port from the gap portion, which had a great influence on the efficiency of the blower.

8 is a configuration diagram showing an example of a conventional blower. As shown in FIG. 8, this blower is composed of a bell mouth 8, an impeller 9, and a motor 10. In order to reduce the thickness of the whole apparatus, the housing part of the motor 10 is provided in the area | region which the bell mouse 8 surrounds. Since the receiving portion is provided to block the suction port, the flow of air flow appears as the flow path 11. Therefore, the inflow resistance of air was increased and it became a cause of efficiency fall.

FIG. 9 is an enlarged view of an overlapped portion of the bell mouth 8 and the impeller 9 of the conventional blower shown in FIG. 8. As shown in Fig. 9, in this overlapping portion, there is a leak flow 12 as a flow from the inside of the apparatus toward the intake port of the impeller 9 without passing through the bell mouse 8, which is one of the causes of deterioration of the blowing efficiency. Was becoming.

10 is a configuration diagram of an embodiment of a blowing device proposed by the present applicant in Japanese Patent Application 2006-297952 filed previously. As shown in FIG. 10, a bell mouse 8 and an impeller 9 which suck air are provided, and fixed to the rotor 16 and the bell mouse 8 fixed to the impeller 9 therebetween. The motor which consists of the fixed stator 17 is arrange | positioned. In addition, a bearing 15 is disposed between the bell mouth 8 and the impeller 9. The bearing 15 is a bearing of a type having a rolling element between the inner ring inside the radial direction of the impeller, the outer ring outside the radial direction, and both wheels, and the inner ring is fixed to the bell mouth 8 that has returned to the inside of the bearing, The outer ring is fixed to the impeller 9. The bearing 15 allows the impeller 9 to rotate relative to the bell mouth 8.

FIG. 11 is an enlarged view of an overlapped portion of the bell mouth 8 and the impeller 9 of the blower shown in FIG. 10. As shown in FIG. 11, since the bearing 15 is disposed between the bell mouth 8 and the impeller 9, the air flow path 11 is skewed by the step 22 of the thickness of the bearing. This results in an expansion loss, i.e. a loss when the air flow is enlarged.

A rotating shaft of a magnetic rotating body that becomes an impeller of a magnet pump is provided in the center of a shaft supporting member such as a cross shape provided in the pipe, and a magnet having alternating magnetic poles is arranged on the outer circumference of the magnetic rotating body, and the motor An induction rotation drive unit serving as a stator is disposed, and the magnetic rotational body is rotationally driven by a rotating magnetic field generated in the induction rotational drive unit, and the magnetic rotational body is provided with a axial symmetrical centrifugal flow path in which pressure caused by the centrifugal force is generated. Moreover, the fluid condensation conveying apparatus which provided the guide impeller in the outlet side of an impeller is disclosed (refer patent document 1). In addition, although it is a blower provided with an impeller, the stator which integrated the bell mouse which supplies air to an impeller, the rotor of a motor is installed in an impeller, and the stator of a motor is arrange | positioned at the side which fixes a blower. It is proposed (refer patent document 2). Further, a plurality of blades are installed on a rotating shaft to form a windmill, and a plurality of permanent magnets are installed in a torus provided over the outer circumference of these blades to form a rotor, and a bell mouse surrounds the windmill at the end of the air introduction side. There is disclosed a wind generator in which a cylindrical casing is formed and a stator is formed radially along the outer periphery of the blade on the casing (see Patent Document 3).

However, in the fluid axial feeding device disclosed in Patent Literature 1, the guide vane is not integral with the magnetic rotating body that is the impeller. Moreover, also in patent document 2, 3, it does not disclose the structure which integrated the bell mouse and the rotor in the impeller.

In the conventional blower, it is difficult to increase the efficiency of the blower due to the suction resistance of the motor accommodating part and the leak from the inside of the device to the inlet, and since the motor is disposed in the center of the impeller, it is difficult to reduce the size of the blower as a whole. Even if the entire air blower is to be thinned, it is difficult to achieve both high efficiency and low noise because the motor housing is located at the center of the impeller.

<Patent Document 1> Japanese Patent Application Laid-Open No. 2000-274398 (FIG. 3)

<Patent Document 2> Japanese Patent Application Laid-Open No. 62-184194

<Patent Document 3> Japanese Unexamined Patent Publication No. 11-299197

Therefore, there is a problem to be solved in terms of improving the blowing efficiency by eliminating the guide discontinuity of the air flow between the bell mouse for guiding the introduced air flow and the impeller that sucks and discharges air.

An object of the present invention is to provide a blower having high efficiency, thinness, low noise, and stable characteristics in order to solve the above problems, and to provide a blower of high performance.

An air blower according to the present invention includes an annular motor having an impeller, a bell mouse for guiding the flow of air sucked into the impeller, an annular stator fixed to the apparatus frame side, and an annular rotor provided on the impeller side. The impeller is a bell mouse integrated impeller integrated with the bell mouse, and the annular rotor of the motor is installed on the bell mouse integrated impeller.

According to this blower, since the impeller and the bell mouse are integrated, there is no gap between the impeller and the bell mouse. Therefore, the guide discontinuity of the air flow is eliminated and there is no air leaking through the gap. In the case where the impeller and the bell mouse are configured separately, the gap between the two is formed in the radial direction, or a bearing is disposed between the two, so that an enlarged loss occurs in the air flow. The loss is reduced, the efficiency is high, and the characteristic fluctuation due to the gap is eliminated, so that the blowing efficiency is more stable.

Moreover, according to this blower, since the clearance gap of a radial direction is not formed between an impeller and a bell mouse, the stator and rotor of a motor can be made large diameter by that much, and according to the large diameter, the stator and rotor are rotated to a rotation axis direction. I can thin it. By thinning the motor, the entire blower can be miniaturized. Moreover, the blower which integrated an impeller, a bell mouse, and a motor can be comprised, and assembly property can be improved.

Moreover, according to this blower, since the motor accommodating part can be removed in the center part of an impeller, the part which becomes an inflow resistance is eliminated and it can make low noise.

As described above, in the blower according to the present invention, a bell mouse is disposed between the impeller and the side for fixing the impeller and the blower by integrally integrating a bell mouse for guiding the flow of air introduced into the impeller. It is possible to improve the efficiency of air blowing by eliminating the guidance discontinuity of the air flow between the impeller and the impeller, so that a blower having high efficiency, thinness, low noise, and stable characteristics can be configured, and a high-performance blower can be obtained.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the blower which concerns on this invention is described with reference to FIGS. In each Example, the part and site | part which exhibit the same function are used with the conventional blower shown in FIG. 8 thru | or 11, The same code | symbol is attached | subjected.

First embodiment

1 is a longitudinal sectional view showing a first embodiment of a blower according to the present invention. As shown in FIG. 1, the blower which concerns on this invention is equipped with the impeller 1 with which the bell mouse which inhales air is integrated, and the motor which rotates the impeller 1. As shown in FIG. The motor has an annular rotor 3 fixed to the impeller 1 side and an annular stator 4 fixed to the apparatus frame side. A bearing 5 is disposed between the bell mouth-integrated impeller 1 and the fixed end 7 of the blower, and the impeller 1 is formed inside the fixed end 7 of the blower by the bearing 5. It is possible to rotate. When the impeller 1 rotates, air is introduced from the suction port 2 to blow air.

The bearing 5 is provided with the inner ring 5a of radial direction inner side, the outer ring 5b of radial direction outer side, and the rolling element 5c like a ball arrange | positioned between both wheels. The inner ring 5a and outer ring 5b of the bearing 5 are respectively arranged in correspondence with the rotor 3 and the stator 4 at the air introduction side of the motor. An end portion of the bell mouth integrated impeller 1 is provided on the outer side of the inner ring 5a, and the impeller 1 faces the side of the stator 4 at the air delivery side along the inside of the rotor 3. Extends to the position. The bearing 5 allows the bell mouth integral impeller 1 to rotate about the fixed end 7 and the stator 4.

FIG. 2 is a top view of the motor unit in the blower shown in FIG. 1. As shown in FIG. 2, the rotor 3 is located inside, and the stator 4 is arrange | positioned at the outer periphery. A bearing (indicated by reference numeral 5 in Fig. 1) is arranged on the upper part of the motor, and the inner ring side of the bearing 5 is connected to the impeller 1 and the rotor 3 of the bell-mouse-integrated body. The outer ring side is fixed to the stator 4 and the fixed end 7 of the blower. A plurality of coils 6 are arranged side by side in the circumferential direction of the stator 4, and the stator 4 can generate a rotating magnetic field by controlling the excitation of the coil 6.

Second embodiment

3 is a longitudinal sectional view showing a second embodiment of the blower according to the present invention. The blower shown in FIG. 3 is provided with the bell mouth-type impeller 1 which inhales air, and the motor which rotates the impeller 1. The motor has a rotor 3 fixed to the impeller side and a stator 4 fixed to the blower side, and the structure thereof is the same as in the case of the first embodiment. A bearing 5 is disposed between the bell mouth integral impeller 1 and the fixed end 7 of the blower, and the bell mouth integral impeller 1 can rotate with respect to the fixed end 7 of the blower. It is supposed to be.

The bearing 5 in this embodiment is provided with an inner ring 5d in the axial direction, an outer ring 5e in the axial direction, and a rolling element 5f such as a ball disposed between both wheels. The inner ring 5a of the bearing 5 is arrange | positioned corresponding to the stator 4 in the air introduction side. The end of the bell mouth-integrated impeller 1 is provided on the outer side of the outer ring 5e, and the part of the other impeller 1 is air-fed along the inside of the rotor 3, similarly to the first embodiment. It extends to the position which faces the side surface of the stator 4 in. The bearing 5 allows the bell mouth integral impeller 1 to rotate about the fixed end 7 and the stator 4.

Third embodiment

4 is a longitudinal sectional view showing a third embodiment of the blower according to the present invention. The blower which concerns on 3rd Example shown in FIG. 3 is equipped with the impeller 1 with which the bell mouse which sucks air is integrated, and the motor which rotates the impeller. The motor has a rotor 3 fixed to the impeller side and a stator 4 fixed to the blower side. The other structure is the same as that of the first and second embodiments. The impeller support shaft 21 is provided in the center of the impeller 1, and the bearings 5 and 5 are arrange | positioned at the impeller support shaft 21. As shown in FIG. Each bearing 5 has an inner ring 5g, an outer ring 5h, and a rolling element 5i disposed between both wheels. On the outer ring of the bearing 5, the foreign matter inflow prevention wire mesh and the impeller support part 20 is arrange | positioned.

FIG. 5 is a top view of the fourth embodiment shown in FIG. 4. On the air introduction side, a concentric wire mesh is provided for preventing foreign matter from entering. For the purpose of supporting the wire mesh and the purpose of supporting the impeller 1, a plurality of support portions 20 are disposed extending radially from the center of the blower toward the fixed end portion 7. The bearing 5 is provided with the inner ring 5g provided in the impeller support shaft 21, the outer ring 5h provided in the support part 20, and the rolling element 5i arrange | positioned between both wheels. That is, the bell mouth integrated impeller 1 is rotatably supported by the bearing 5 and the impeller support shaft 21 in the center part of the support part 20 which supports the wire net for preventing the inflow of foreign substances.

FIG. 6 shows a flow path 13 of the air flow in the blower of the first embodiment shown in FIG. As shown in Fig. 6, since there is no motor storage portion in the central portion of the impeller 1, there is no factor of increasing the inflow resistance of air, and the efficiency can be improved by about 4% compared with the conventional products.

FIG. 7 is an enlarged view of a portion of the bell mouth integrated impeller 1 and the fixed end 7 of the blower in the blower of the first embodiment shown in FIG. In the path of the leak from the inside of the device towards the inlet of the impeller 1, there is a magnetic gap 14 and a bearing 5 between the rotor 3 and the stator 4. Usually, the magnetic gap is very narrow, about several millimeters, and there is a distance for the thickness of the motor, and it is a structure which is hard to leak compared with a conventional product. Moreover, the bearing 5 exists to the exterior of an apparatus, and it is a structure which is hard to leak further. In addition, by using a bearing having a seal portion in the bearing 5, it is possible to make it more difficult to leak. Therefore, compared with the prior art, the amount of leak is small and a highly efficient blower can be comprised.

In the conventional blower, as shown in FIG. 11, the step | step 22 between the bell mouse 8 and the impeller 9 generate | occur | produced, and the expansion loss was generated as a flow path. In the blower according to the present invention, the impeller is an integral impeller 1 in which the bell mouth portion 1a and the impeller portion 1b are integrated as shown in an enlarged view of FIG. 7. 22) does not occur, and the expansion loss in the flow path of the expanding flow can be reduced.

In addition, in the conventional blower, since the motor 10 exists in the center part of the impeller 9, as shown in FIG. 8, air flow does not directly contact the motor 10, and the It was a disadvantageous structure for cooling. However, in the blower of the present invention, as shown in FIG. 1, FIG. 3, or FIG. 4, since the rotor 3 is fixed to the impeller 1, the impeller 1 has a role of a radiator of the motor.

The blower which concerns on this invention is useful as a blower for which the air volume, such as a ventilation fan and a blower for cooling and air conditioning, is calculated | required.

1 is a configuration diagram showing a first embodiment of the blower of the present invention.

FIG. 2 is a top view of the blower shown in FIG. 1. FIG.

3 is a configuration diagram showing a second embodiment of the blower of the present invention.

4 is a configuration diagram showing a third embodiment of the blower of the present invention.

FIG. 5 is a top view of the blower shown in FIG. 4. FIG.

FIG. 6 is a diagram showing an air flow in the blower shown in FIG. 1 as the first embodiment. FIG.

FIG. 7 is an enlarged view showing a motor portion of the blower shown in FIG. 1 as the first embodiment; FIG.

8 is a view showing the form of a conventional blower and the flow of air;

9 is an enlarged view showing an overlapping portion of a bell mouse and an impeller of the blower shown in FIG. 8;

10 is a view showing the shape of the conventional blower and the flow of air.

FIG. 11 is an enlarged view showing an overlapping portion of a bell mouse and an impeller of the blower shown in FIG. 10; FIG.

<Code description>

1: bell mouse integrated impeller

1a: Bell mouse part

1b: impeller part

2: inlet

3: rotor

4: stator

5: bearing

5a, 5d, 5g: inner ring

5b, 5e, 5h: outer ring

5c, 5f, 5i: rolling elements

6: coil

7: fixed end of blower

13: air passage

14: magnetic gap

20: foreign matter inflow wire mesh and impeller support

21: impeller support shaft

Claims (6)

And an annular motor having an impeller, a bell mouse for guiding the flow of air sucked into the impeller, an annular stator fixed to the apparatus frame side, and an annular rotor provided on the impeller side, The impeller is a bell mouse integrated impeller integrated with the bell mouse, and the annular rotor of the motor is installed in the bell mouse integrated impeller. The blowing device according to claim 1, wherein the bell mouse integrated impeller is rotatably supported by the device frame by a bearing disposed on an air introduction side of the annular motor. 3. The bearing according to claim 2, wherein the bearing has an inner ring disposed radially inwardly corresponding to the annular rotor, an outer ring disposed radially outwardly corresponding to the annular stator, and a rolling element disposed between both wheels. A blower, characterized in that. The blower according to claim 2, wherein the bearing has an inner ring disposed axially inwardly corresponding to the annular stator, an outer ring disposed axially outward, and a rolling element disposed between both wheels. . The blower device according to claim 1, wherein the bell mouse integrated impeller is provided at an impeller support shaft rotatably supported through a bearing in a central portion of a support portion for supporting a wire net for preventing foreign matter from entering. . The said bell-mouse integrated impeller covers at least the side part of the said annular rotor at the air introduction side, and the said annular rotor as it goes to the air delivery side, The said annular rotor of any one of Claims 1-5. It extends along and extends to the position which faces the side surface of the said annular stator by the air delivery side, The blower characterized by the above-mentioned.

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