KR20210007929A - Fan Motor and Manufacturing the Same - Google Patents

Abstract

The present invention relates to a fan motor which can improve the efficiency of the fan motor. The fan motor comprises: a motor housing accommodating a motor; a motor bracket disposed on an upper side of the motor housing; an impeller coupled to a shaft of the motor; and a diffuser disposed between the motor and the impeller, and having a vane body, an axial flow type vane provided on an inner circumference of the vane body, and a four flow type vane provided on an upper side of the axial flow type vane.

Description

Fan motor and manufacturing method thereof {Fan Motor and Manufacturing the Same}

The present invention relates to a motor and a manufacturing method thereof, and more particularly, to a fan motor and a manufacturing method thereof.

The fan motor is a kind of actuator that generates rotational force. The fan motor generates suction power by rotation of a fan (impeller) connected to the rotation shaft of the motor. Fan motors are used in various devices. Fan motors are used in home appliances such as vacuum cleaners and air conditioners, and automobiles. For example, when a fan motor is used in a cleaner, air sucked by the fan motor flows to the filter of the cleaner.

In general, the fan motor includes a motor and an impeller connected to the rotation shaft of the motor. A diffuser may be provided between the motor and the impeller.

When the motor rotates, the impeller connected to the rotating shaft of the motor also rotates. By rotation of the impeller, air is sucked in the direction of the impeller. Air from the impeller is guided by the diffuser and discharged toward the motor.

The problem of the conventional fan motor will be described as follows.

First, the problem of the conventional impeller will be described.

The impeller may include a hub and a plurality of blades provided in the hub. However, conventionally, a centrifugal impeller is used, and a centrifugal flow occurs in the impeller.

Conventionally, the hub line of the impeller extends in the radial direction, and thus the flow out of the impeller is also discharged in the radial direction. Therefore, the flow passing through the impeller is rapidly bent close to 90 degrees and enters the diffuser direction.

In general, the flow path loss is large in the part where the flow breaks sharply, and the flow efficiency is not good. However, as described above, in the conventional impeller, since the flow is rapidly bent, the flow path loss is large and the flow path efficiency is poor.

The problem of the conventional diffuser will be described.

The diffuser may include a hub and a plurality of vanes provided in the hub. However, conventionally, an axial flow type diffuser is used, and an axial flow type occurs in the diffuser.

Conventionally, a vane is provided on the hub in the axial direction. Thus, the flow from the impeller breaks sharply to enter the vanes. This is because the flow from the impeller is approximately in the radial direction, and the vanes of the diffuser are provided in the axial direction. Therefore, the conventional diffuser has a large flow path loss and poor flow efficiency.

Meanwhile, in the related art, there is a section without vanes of the diffuser (hereinafter referred to as'vaneless section') between the impeller and the diffuser, and the vaneless section is long. However, the vaneless section does not have vanes and cannot guide the flow. Therefore, in the conventional fan motor, the flow path loss is large in the vaneless section and the flow path efficiency is poor.

On the other hand, conventionally, the length of the vane of the diffuser is short. However, if the length of the vane of the diffuser is short, the flow cannot be effectively guided. Therefore, the conventional diffuser has little diffuser effect and has poor flow efficiency.

As described above, the conventional fan motor has a large flow path loss in the impeller and diffuser. Therefore, the conventional fan motor has a disadvantage in that the flow path efficiency is not good and the overall fan motor efficiency is also low. In addition, in recent years, as fan motors are miniaturized and super-fast, it is more necessary to reduce flow path loss and improve flow efficiency.

Korean Patent Registration No. 1454083 US Patent Publication 2014/268636 European patent registration 01025792 B1 US patent registration 5592716 Korean Patent Registration No. 1289026 Korean Patent Publication No. 10-2014-0070303

An object of the present invention is to provide a fan motor and a method of manufacturing the same that solves the above-described problems.

An object of the present invention is to provide a fan motor having an impeller capable of reducing flow path loss and improving flow path efficiency.

Another object of the present invention is to provide a fan motor having a diffuser capable of reducing flow path loss and improving flow efficiency.

Another object of the present invention is to provide a fan motor capable of minimizing a vaneless section between an impeller and a diffuser.

Another object of the present invention is to provide a fan motor capable of maximizing the vane length of a diffuser.

Another object of the present invention is to provide a fan motor capable of improving the efficiency of the fan motor.

Another object of the present invention is to provide a fan motor having a diffuser that is easy to manufacture.

Another object of the present invention is to provide a fan motor having a diffuser that efficiently guides the flow.

The subject of the present invention is not limited to the above-mentioned problems, and other problems that are not mentioned may be understood by those skilled in the art from the following description.

In the present invention, the impeller is a four-flow type. Therefore, it is possible to minimize flow path loss in the impeller and maximize flow path efficiency.

In the present invention, the diffuser includes a four-flow type. Therefore, it is possible to minimize flow path loss in the diffuser and maximize flow path efficiency.

In the present invention, vanes of the diffuser, for example, four-flow vanes, are provided in the vaneless section. The vaneless section between the impeller and diffuser can be minimized. Therefore, it is possible to minimize flow path loss and maximize flow path efficiency.

In the present invention, a four-flow type vane is provided above the axial flow type vane of the diffuser. Therefore, the length of the vane of the diffuser can be maximized. Therefore, it is possible to minimize flow path loss and maximize flow path efficiency.

In the present invention, the diffuser is composed of two parts, a hub and a vane structure. Therefore, it is easy to manufacture the diffuser.

In the present invention, the vane structure is fixed using other parts of the fan motor without a separate fastening structure such as a screw. Therefore, assembling property is improved.

In the present invention, a vane is provided inside the vane body. Thus, the flow is efficiently guided in the vanes.

According to an embodiment of the present invention, the present invention includes a motor housing housing a motor; A motor bracket disposed on the upper side of the motor housing; An impeller coupled to the shaft of the motor; A fan motor comprising a diffuser disposed between the motor and the impeller and having a vane body, an axial flow vane provided on an inner circumference of the vane body, and a four-flow vane provided above the axial flow vane. to provide.

According to an exemplary embodiment, the vane body may be a hollow ring, the axial flow vane may be provided on the inner surface of the ring, and a four-flow vane may be provided on the upper side of the axial flow vane.

According to an exemplary embodiment, the vane body, the axial flow vane, and the four flow vane may be integrally injection molded.

According to an exemplary embodiment, a hub is provided inside the vane body, and a shape of an upper portion of the outer circumference of the hub may correspond to the shape of the four-flow vane.

According to an exemplary embodiment, the hub may be injection molded.

According to an exemplary embodiment, a groove may be provided in the vane body, and a fitting portion corresponding to the groove may be provided in the motor bracket.

According to an exemplary embodiment, the groove includes at least one of a first groove provided in a circumferential direction and a second groove provided in an axial direction, and the fitting part comprises a first fitting part corresponding to the first groove and It may include at least one of the second fitting portions corresponding to the second groove.

According to an exemplary embodiment, the motor bracket may include a bearing housing, a support part, and a bridge connecting the bearing housing and the support part, and the fitting part may be provided to extend radially from the support part.

According to an exemplary embodiment, the first fitting portion may be provided with a screw fastening groove.

According to an exemplary embodiment, one end of the second fitting portion may be connected to a side surface of the bridge.

According to an exemplary embodiment, the vane body of the diffuser may be supported inside the impeller housing.

According to an exemplary embodiment, an upper portion of the vane body may be supported on an inner surface of the impeller housing.

According to an exemplary embodiment, a step may be provided on an inner surface of the impeller housing, and an upper portion of the vane body may be supported at the step.

According to an exemplary embodiment, the vane body may be fixed in the axial direction by the combination of the impeller housing and the motor housing.

According to an exemplary embodiment, the outer diameter of the vane body may correspond to the inner diameter of the impeller housing.

According to an embodiment of the present invention, the present invention includes a motor housing housing a motor; A motor bracket disposed on the upper side of the motor housing; An impeller coupled to the shaft of the motor;

An impeller housing accommodating the impeller; And a diffuser disposed between the motor and the impeller, the diffuser providing a fan motor including a vane body supported on an inner side of the impeller and a vane provided on an inner circumference of the vane body of the vane body .

According to an exemplary embodiment, the vane may include an axial flow type vane and a four-flow type vane provided on an upper side of the axial flow type vane.

According to an exemplary embodiment, a step is provided on an inner surface of the impeller housing, and an upper portion of the vane body may contact the step.

According to an exemplary embodiment, the inner diameter of the impeller housing and the outer diameter of the vane body may correspond.

According to an exemplary embodiment, a hub is provided inside the vane body, and an upper surface of an outer circumference of the hub may support the four-flow vane.

According to an exemplary embodiment, a groove may be provided in the hub, and a fitting portion corresponding to the groove may be provided in the motor bracket.

According to an exemplary embodiment, the vane body may be fixed in the axial direction by the combination of the impeller housing and the motor housing.

According to an embodiment of the present invention, the present invention includes a first step of making a vane body having a hollow portion and having a vane around the inner circumference; It provides a method of manufacturing a fan motor including a second step of assembling a hub in a hollow portion of the vane body.

According to an exemplary embodiment, in the second step, the hub is coupled to the motor bracket, the lower portion of the vane body is fitted with the motor bracket, and the vane body is fixed in the circumferential direction, and the upper portion of the vane body is Supported by the impeller housing, the vane body may be fixed in the axial direction.

Each of the features of the above-described embodiments may be implemented in combination in other embodiments unless contradictory or exclusive with other embodiments.

The effects of the fan motor and its manufacturing method according to the present invention described above are as follows.

First, according to the present invention, the impeller is a four-flow type. Therefore, there is an advantage of minimizing flow path loss in the impeller and maximizing flow efficiency.

Second, in the present invention, the diffuser includes a four-flow type. Therefore, there is an advantage of minimizing flow path loss in the diffuser and maximizing flow efficiency.

Third, in the present invention, vanes of the diffuser, for example, four-flow vanes, are provided in the vaneless section. Therefore, it is possible to minimize the vaneless section between the impeller and the diffuser. Accordingly, there is an advantage of minimizing flow path loss and maximizing flow path efficiency.

Fourth, in the present invention, a four-flow type vane is provided above the axial flow type vane of the diffuser. Therefore, the length of the vane of the diffuser can be maximized. Accordingly, there is an advantage of minimizing flow path loss and maximizing flow path efficiency.

Fifth, in the present invention, the diffuser is composed of two parts, a hub and a vane structure. Therefore, it is easy to manufacture the diffuser.

Sixth, in the present invention, the vane structure is fixed using other parts of the fan motor without a separate fastening structure such as a screw. Therefore, assembling property is improved.

Seventh, in the present invention, a vane is provided inside the vane body. Thus, the flow is efficiently guided in the vanes.

1 is an exploded perspective view showing an embodiment of a fan motor according to the present invention.
2 is a longitudinal sectional view of FIG. 1.
3 is a perspective view of the impeller of FIG. 1.
4 is a perspective view of the diffuser of FIG. 1.
5 is an exploded perspective view showing another embodiment of a fan motor according to the present invention.
6 is a perspective view of the motor bracket and vane structure of FIG. 5 combined.
7 is an exploded perspective view of the impeller housing and vane structure of FIG. 5.
8 is a combined cross-sectional view of FIG. 7.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a fan motor and a method of manufacturing the same according to the present invention will be described. Hereinafter, the components of the present invention will be described with reference to the drawings and embodiments that specifically specify the components of the present invention, but these are only used to aid understanding of the present invention.

In addition, in the following embodiments, specific elements may be exaggerated or reduced for convenience of description and may be shown or described, but this is also intended to aid understanding of the present invention.

Therefore, the present invention is not limited to the embodiments to be described below or the form drawn in the drawings, and various modifications and variations are possible from these descriptions to those of ordinary skill in the art to which the present invention pertains, and such modifications and variations Is the scope of the present invention.

1 and 2, the overall configuration of an embodiment of a fan motor 1 according to the present invention will be described.

The motor 2 may include a stator 22 and a rotor 24. The impeller 5 may be coupled to the rotation shaft 242 of the rotor 24. Therefore, when the motor 2 rotates, the impeller 5 also rotates, and a suction force for sucking air is generated.

A diffuser 6 may be provided between the impeller 5 and the motor 2. The diffuser 6 guides the airflow from the impeller 5 to the motor 2.

Meanwhile, the motor 2 may be accommodated in the motor housing 3. A motor bracket 4 may be provided on the motor housing 3. The impeller 5 and the diffuser 6 may be accommodated in the impeller housing 7.

Each component will be described in detail as follows.

First, the motor housing 3 will be described.

The motor housing 3 may include a body 32 accommodating the motor 2. A coupling part 34 extending in a radial direction may be provided on the upper side of the body 32 of the motor housing 3.

The body 32 may have a hollow cylindrical shape as a whole. An opening 322 having a predetermined shape may be provided at the side of the body 32. An opening 324 may also be provided under the body 32. Air introduced into the motor housing 3 may be discharged to the outside through the lower opening 324 of the body 32.

A bearing housing 326 on which a bearing is seated (hereinafter, a'lower bearing housing' for convenience) may be provided under the body 32. A connection part 328 for connecting the lower bearing housing 326 and the body 32 may be provided.

Meanwhile, an opening 342 having a predetermined shape may be provided in the coupling portion 34. The flow from the diffuser 6 may flow through the opening 342. The coupling portion 34 may be provided with a screw fastening groove 344 for coupling with the impeller housing 7. The coupling portion 34 may be provided with a screw fastening groove 346 for coupling with the motor bracket 4.

Meanwhile, the stator 22 may be coupled to the inner surface of the body 32 of the motor housing 3. The rotor 24 may be located approximately in the vicinity of the center of the body 32 of the motor housing 3. The lower portion of the rotation shaft of the rotor 24 may be rotatably supported by the lower bearing housing 326.

Next, the motor bracket 4 will be described.

The motor bracket 4 may rotatably support the upper portion of the rotation shaft of the rotor 24. In addition, the motor bracket 4 may be coupled to the diffuser 6 to support the diffuser 6.

In detail, it is as follows.

A bearing housing 42 (hereinafter, for convenience,'upper bearing housing') may be provided near the center of the motor bracket 4. Outside of the motor bracket 4, a support portion 44 supported by the coupling portion 34 of the motor housing 32 may be provided. The support portion 44 may substantially correspond to the shape of the coupling portion 34. For example, the support portion 44 may have a ring shape.

An auxiliary support part 444 may be provided inside the support part 44. The auxiliary support 444 may have a ring shape. A portion connecting the support portion 42 and the auxiliary support portion 444 may be provided, and a screw fastening groove 442 may be provided in this portion.

The support portion 44 may be provided with a screw fastening groove 442 corresponding to the screw fastening groove 346 of the coupling portion 34 of the motor housing 3.

A bridge 46 connecting each other may be provided between the upper bearing housing 42 and the support 44. The bridge 46 may be provided with a screw fastening groove 462 corresponding to the screw fastening groove 68 of the diffuser 6 (a detailed coupling structure will be described later).

Next, the impeller housing 7 will be described.

The impeller housing 7 can accommodate the impeller 5 and the diffuser 6. The impeller housing 7 may be configured in an approximately hollow cylindrical shape. The opening 74 at the top of the impeller housing 7 may be an inlet through which air is introduced.

The impeller housing 7 may increase in diameter as it goes from top to bottom. A coupling part 76 extending in a radial direction may be provided below the impeller housing 7. The coupling portion 76 of the impeller housing 7 may be provided with a screw coupling groove 762 corresponding to the screw coupling groove 344 of the coupling portion 34 of the motor housing 3.

The coupling relationship of each component will be described.

The upper part of the rotation shaft of the rotor 24 may be rotatably supported by the upper bearing housing 42 of the motor bracket 4. The lower portion of the rotation shaft of the rotor 24 may be rotatably supported by the lower bearing housing 326 of the motor housing 3. The motor bracket 4 may be screwed onto the motor housing 3.

Meanwhile, the diffuser 6 may be screwed to the upper portion of the motor bracket 4. The impeller 5 may be coupled to the uppermost end of the rotor 24 rotation shaft.

Finally, the impeller housing 7 and the motor housing 3 can be screwed.

Meanwhile, as shown in A of FIG. 2, the motor housing 3 may be press-fit into the impeller housing 7 to be coupled to each other. In this case, the front end of the coupling portion 34 of the motor housing 3 is bent downward, and this portion can be press-fit into the impeller housing 7.

Accordingly, the components of the fan motor 1 can be accommodated in the impeller lowering 7 and the motor lowering 3.

Referring to Figure 3, the impeller 5 of this embodiment will be described as follows.

In this embodiment, in order to reduce flow path loss, a structure capable of reducing the angle at which the flow from the impeller 5 is bent is proposed.

The impeller 5 of this embodiment may be a four-flow type. The flow F1 introduced into the impeller 5 through the inlet 74 of the impeller housing 7 is almost axial. However, the flow F2 coming out of the impeller 5 may have a predetermined slope.

For example, the impeller 5 can be configured so that the direction of the flow F2 coming out of the impeller 5 has an inclination between the radial direction (0 degrees) and the axial direction (90 degrees). The direction of the flow F2 coming out of the impeller 5 may be about 45 degrees.

In detail, it is as follows.

The impeller 5 may include a hub 52 and a plurality of blades 54 provided in the hub 52. The hub 52 may have an approximately circular shape. A blade 54 may be provided on the upper surface of the hub 52.

The direction of the flow F2 coming out of the impeller 5 may have a predetermined slope downward in the radial direction. To this end, the impeller 5 can be tilted further downward from the horizontal. For example, when viewing the vertical cross section of the hub 52 of the impeller 5, the inclination of the upper surfaces 52a and 52b of the hub may be configured to have an angle between 0 and 90 degrees, preferably 45 degrees. . In addition, as it goes from the upper side 52a to the lower side 52b of the upper surface of the hub, it may have an inclination close to the axial direction. With this configuration, it is possible to create a flow closer to the axial direction toward the outside of the hub (see Fig. 2).

With this configuration, the direction of the flow F2 coming out of the impeller 5 can be made obliquely downward than the radial direction. Therefore, it is possible to reduce the sudden change of the flow direction coming out of the impeller 5, minimize flow path loss, and maximize flow path efficiency.

In addition, compared with the flow direction of the conventional centrifugal impeller, the flow direction of the impeller 5 of this embodiment is inclined a lot downward, that is, in the axial direction. Therefore, the flow rate in the axial direction increases. Consequently, the flow rate passing through the fan motor 1 increases, and accordingly, the suction capacity of the fan motor 1 increases.

Further, compared with the flow rate of the conventional centrifugal impeller, the flow rate of the impeller 5 of this embodiment is large. Therefore, compared with the same standard, the number of blades of the impeller can be reduced. For example, if the number of blades of the conventional centrifugal impeller is 9, the impeller 5 of this embodiment can secure a sufficient flow rate even if the number of blades 54 is reduced to 7.

In addition, when the number of blades 54 of the impeller 5 is reduced, the axial power received from the impeller 5 is reduced. Therefore, in the impeller 5 of this embodiment, since it is possible to reduce the shaft power, the efficiency of the fan motor 5 is also increased.

Referring to FIG. 4, another embodiment of the fan motor 1 will be described.

The diffuser 6 of this embodiment will be described as follows.

The diffuser 6 may include a hub 62 and a vane 64. The hub 62 may be provided with a plurality of vanes 64.

The hub 62 may be configured in a disk shape. The hub 62 may be provided with an opening 66 into which the bearing housing 42 of the motor bracket 4 is inserted. The shape of the opening of the hub 62 may correspond to the shape of the bearing housing 42 of the motor bracket 4. In addition, the hub 62 may be provided with a screw fastening groove 68 for screwing the motor bracket 4 and the hub 62.

Meanwhile, a plurality of vanes 64 may be provided on the outer circumferential surface 65 of the hub 62. The vane 64 may include an axial flow vane 644 and a four flow vane 642. The four-flow vane 642 may mainly serve as a diffuser, and the axial flow vane 644 may serve to increase the flow rate by changing the flow direction downward.

Meanwhile, a four-flow-type vane 642 may be positioned above the axial-flow-type vane 644. For example, an axial vane 644 may be provided on the outer peripheral side 652 of the hub 62. A four-flow vane 642 may be provided on the upper surface 654 of the outer circumference of the hub 62. The four-flow vane 642 may have a shape in which the angle of the leading edge is inclined.

Although the axial flow type vane 644 and the four flow type vane 642 may be provided separately, it is preferable that the four flow type vane 642 and the axial flow type vane 644 are connected to one vane as a whole.

Meanwhile, in general, the gap between the impeller 5 and the diffuser 6 is a vaneless section without vanes. However, in the vaneless section, euro losses are large. Therefore, the size of the four-flow type vane 642 may be a size that covers the vaneless section if possible. For example, the upper end of the four-flow vane 642 may be provided so as to be substantially adjacent to the lower portion of the impeller 5.

On the other hand, the longer the total length of the vanes of the diffuser 6, the better. This is because, as the overall length of the vane is longer, the flow coming out of the impeller 5 can be effectively guided. Therefore, it is desirable to lengthen the total length of the vanes of the diffuser 6. In addition, there is not much free space under the diffuser 6. Therefore, it is good to extend the length of the vane above the diffuser 6.

By the way, in this embodiment, a four-flow type vane 642 may be provided on the upper side of the axial flow type vane 644. That is, according to the present embodiment, the total length of the vane 64 is increased by the length of the four-flow vane 642 without increasing the length of the axial flow vane 644. Of course, it is also possible to increase at least one of the length of the axial flow vane 644 and the length of the four flow vane 642.

2 and 3, the operation of the diffuser 6 according to this embodiment will be described.

In this embodiment, there is a four-flow vane 642 at a portion where the flow F2 from the impeller 5 flows into the diffuser 6. Therefore, the flow (F2) from the impeller (5) is first guided by the four-flow vane (642), first becomes the flow (F3a) in the oblique direction. Therefore, the flow from the impeller 5 flows more efficiently toward the diffuser 6 without loss of flow path.

That is, the four-flow vane 642 allows the flow coming out of the impeller 5 to naturally exit downward. Therefore, the four-flow vane 642 suppresses the rotational component of the flow and helps to escape efficiently.

In addition, if the impeller 5 is a four-flow type impeller, the flow exiting from the impeller 5 in a four-flow type may flow more naturally along the four-flow vane 642 of the diffuser 6. This is because the starting point of the four-flow vane 642 naturally accepts the flow exiting from the impeller 5 in a four-flow type. In addition, the flow F3a guided to the four-flow type vane 642 is transferred to the motor direction by the axial flow type vane 644.

Accordingly, according to this embodiment, it is possible to minimize flow path loss and maximize flow path efficiency. In addition, it is possible to increase the suction capacity of the fan motor 1 efficiently.

In addition, in this embodiment, a four-flow type vane 642 may be provided above the axial flow type vane 644. Accordingly, the four-flow type vane 642 may be provided in the vaneless section, and thus the vaneless section between the impeller 5 and the diffuser 6 can be minimized.

In addition, in this embodiment, a vane, for example, a four-flow vane 642 may be additionally provided above the axial flow type vane 644. Accordingly, the total length of the vanes of the diffuser 6 is increased. Therefore, the diffusion effect increases.

Referring to Figure 2, the operation of the fan motor 1 according to the present embodiment will be described as follows.

When the motor 2 rotates, the impeller 5 connected to the rotating shaft of the motor 2 also rotates. When the impeller 5 rotates, air is sucked through the inlet 74 of the impeller housing 7. That is, the flow F1 in the approximately axial direction occurs.

Air sucked into the impeller housing 7 flows in the direction of the impeller 5. At this time, the impeller 5 of this embodiment may be a four-flow type impeller. Therefore, the flow F2 coming out of the impeller 5 flows downward in the radial direction with a predetermined inclination. For example, flow F2 may be approximately between radial and axial directions. That is, the direction of the flow F2 coming out of the impeller 5 does not bend rapidly in the axial direction. Therefore, according to this embodiment, the flow path loss is reduced.

The flow F2 coming out of the impeller 5 is first naturally guided by the four-flow vanes 642 of the diffuser 6. The flow F3a passing through the four-flow vane 642 becomes a flow F3b in the approximately axial direction by the axial-flow vane 644. That is, since the air flow is naturally guided by the diffuser 6, the flow path loss is reduced.

Part of the flow exiting the diffuser 6 flows into the inside of the motor housing 3 (F5). Air introduced into the motor housing 3 cools the motor 2 and is discharged to the outside through the lower opening 324 of the motor housing 3. In addition, another part of the flow exiting the diffuser 6 flows directly to the outside of the motor housing 3 (F4).

On the other hand, when the fan motor according to the present invention is used in a cleaner, both the flow F5 passing through the motor housing 3 and the flow F4 not passing through the motor housing 3 may flow to the filter of the cleaner.

Meanwhile, in the above-described embodiment, a fan motor having a four-flow type impeller and an axial flow type diffuser has been described as an example. However, it is possible to apply an axial flow type diffuser even in a fan motor having a centrifugal impeller. It is also possible to use a four-flow type impeller in a fan motor having an axial flow type diffuser.

Referring to Fig. 5, another embodiment of the fan motor 1a according to the present invention will be described.

This embodiment is substantially similar in principle to the embodiment described above. However, in this embodiment, the structure of the diffuser is different from the above-described embodiment. In order to avoid complication of description, descriptions of components that are substantially the same as those of the above-described embodiment are omitted.

The diffuser 1 of the above-described embodiment is not easy to manufacture. For example, the diffuser of the above-described embodiment is not easy to eject. Because, in the diffuser of the above-described embodiment, a four-flow vane is provided on the upper surface of the outer circumference of the hub. However, since the upper surface of the outer circumference of the hub is curved and a four-flow vane is provided at this part, injection is not easy.

Therefore, in this embodiment, a diffuser that is easy to manufacture is proposed. In this embodiment, it is proposed to separate the diffuser into two parts to facilitate manufacturing. Further, in the present embodiment, it is proposed to separate the diffuser into two parts, and to fix the two parts, especially the vanes, using peripheral parts without using screws or the like.

The diffuser 6a of the present embodiment will be described in detail as follows.

The diffuser 6a of this embodiment may include a hub 9 and a vane 84 separated from the hub 9. That is, in this embodiment, the diffuser 6a can be separated into the hub 9 and the vane 84, and can be manufactured, for example, injected. In this embodiment, since the vane 84 is separated from the hub 9, the contact surface between the vane 84 and the hub 9 is removed, and each can be easily manufactured, for example, injection.

First, the hub 9 will be described.

The hub 9 of this embodiment may have a shape in which vanes are removed from the hub of the above-described embodiment. An example of the hub 9 of this embodiment will be described as follows.

The hub 9 may include a central portion 92 and a circumferential portion 95 positioned at an outer circumference of the central portion 92. The central portion 92 may have a disk shape, and the circumferential portion 95 may have a cylindrical shape. The central portion 92 and the circumferential portion 95 may be integrally formed.

An opening 96 may be provided in the central portion 92. The shape of the opening 96 corresponds to the shape of the bearing housing 42a of the motor bracket 4a, and the bearing housing 42a may be inserted. In addition, the central portion 92 may be provided with a screw fastening groove 98 for screwing the motor bracket (42a).

There may be a predetermined step 922 between the central portion 92 and the peripheral portion 95.

The upper portion 954 of the circumferential portion 95 may have a curved surface. For example, the upper portion 954 of the central portion 92 may extend while having a curved surface in the center direction. The tip portion 956 of the upper portion 954 of the circumferential portion 95 may have a horizontal plane. The upper portion 954 and/or the tip portion 956 of the circumferential portion 95 may serve to support the vane 84, particularly the four-flow vane 842. To this end, the curvature of the upper surface 954 and/or the tip portion 956 of the hub 9 may correspond to the shape of the four-flow vane 842.

Next, the vane 84 will be described.

In general, there are multiple vanes 84. Therefore, it is preferable to manufacture a plurality of vanes 84 together rather than manufacturing a plurality of vanes 84, respectively. To this end, in order to hold the plurality of vanes 84 as one part, it is preferable to use a separate part.

For example, a plurality of vanes 84 may be provided on the body 82 (hereinafter referred to as'vane body') having a predetermined shape. (Including the vane 84 and the vane body 82, referred to as'vane structure 8'for convenience)

The vane body 82 may be a hollow member. For example, the vane body 82 may have a ring shape or a cylindrical shape. A vane 84 may be provided inside the vane body 82.

The vane 84 may include an axial flow vane 844 and a four flow vane 842. The shapes of the axial flow vanes 844 and the four flow vanes 842 of this embodiment may be substantially the same as the axial flow vanes and the four flow vanes of the above-described embodiment.

Meanwhile, one side of the axial flow vane 844 may be connected to the inner surface of the vane body 82. The four-flow type vane 842 may be configured to extend from the top of the axial flow type vane 844. The four-flow type vane 842 may be configured to extend from the upper end of the axial flow type vane 844 to the upper side in the center direction of the vane body 82. The four-flow type vane 842 may be connected to the axial flow type vane 844 without being connected to the vane body 82.

Meanwhile, a groove 86 having a predetermined shape may be provided under the vane body 82. The groove 86 may serve to fix the vane body 82 by being fitted with a predetermined portion of the motor bracket 4a.

The shape of the groove 86 of the vane body 82 is not limited. For example, the groove 86 may include a first groove 864 provided in the circumferential direction. In addition, the groove 86 may include a second groove 862 provided in the axial direction.

The groove 86 may be a combination of at least one of the first groove 864 and the second groove 862. When the groove 86 includes both the first groove 864 and the second groove 862, the groove 86 may have an approximately inverted'T' shape.

Next, the motor bracket 4a will be described.

The motor bracket 4a of this embodiment may be basically the same as the motor bracket of the above-described embodiment. However, in this embodiment, a predetermined portion of the motor bracket 4a may be fitted to a predetermined portion of the vane body 82. For example, the motor bracket 4a of the present embodiment may have a portion fitted into the groove 86 provided in the vane body 82.

The motor bracket 4a may include a bearing housing 42a, a support portion 44a, and a bridge 46a connecting the bearing housing 42a and the support portion 44a.

The bearing housing 42a may be shaped to accommodate a bearing provided on an upper portion of the rotation shaft of the motor. The shape of the support portion 44a may correspond to the shape of the coupling portion 34 of the motor housing 3. For example, the support portion 44a may have a ring shape. The support portion 44a may be provided with a screw fastening groove 452a.

Meanwhile, the motor bracket 4a may include a fitting portion 45 fitted into the groove 86 of the vane body 82. The fitting part 45 may be provided in a shape corresponding to the groove 86 of the vane body 82. A plurality of fitting portions 45 may be provided with a predetermined distance apart in the circumferential direction.

For example, the fitting portion 45 may include a first fitting portion 452 corresponding to the first groove 864 of the vane body 82. The first fitting portion 452 may be provided to extend in the radial direction from the support portion 44a. The first fitting portion 452 may be a plate-shaped member having a small thickness and a predetermined thickness. The screw fastening groove 452a for screwing with the motor housing 3 may be provided in the support portion 44a or the first fitting portion 452.

In addition, the fitting portion 45 may include a second fitting portion 454 corresponding to the second groove 862 of the vane body 82. The second fitting part 454 may be provided to extend in the axial direction from the support part 454. The second fitting portion 454 may be a plate-shaped member having a small thickness.

On the other hand, the bridge 46a may have any shape as long as it performs a function of connecting the bearing housing 42a and the support portion 44a. For example, the bridge 46a may have a narrow bar shape.

One side of the bridge 46a is connected to the bearing housing 42a and the other side is connected to the support part 44a. However, since there is a difference in height between the bearing housing 42a and the support portion 44a, there may be a difference in height between the upper and lower ends of the bridge 46a.

For example, the bridge 46a may include a horizontal portion 466 and a vertical portion 465. One side of the horizontal part 466 may be connected to the bearing housing 42a and the other side may be connected to the vertical part 465. One side of the vertical part 465 may be connected to the horizontal part 466 and the other side may be connected to the support part 44a. The vertical portion 465 may be provided with a screw fastening groove 466a for screwing with the hub 9.

Meanwhile, one end 454a of the second fitting part 454 may be connected to a side surface of the vertical part 465. In this way, the second fitting portion 454 can more effectively withstand the rotational force generated by the air flow. Because, the second fitting portion 454 can receive a large rotational force generated by the flow from the impeller (5). However, when one end (454a) of the second fitting part 454 is connected to the side of the vertical part 465, the rotational force generated by the flow from the impeller 5 is also supported by the side of the vertical part 465 Can be.

Meanwhile, the upper end 468 of the horizontal portion 466 may extend vertically so as to contact from the side surface of the bearing housing 42a.

The fixing structure of the hub 9 and the vane structure 8 will be described as follows.

Referring to Fig. 5, the fixing structure of the hub 9 will be described.

The motor housing 3 and the motor bracket 4a may be coupled. And the hub 9 may be coupled to the motor bracket 4a.

The combination of the motor bracket 4a and the hub 9 will be described as follows.

The bearing housing 42a of the motor bracket 4a is inserted into the opening 96 of the hub 9. In this state, the hub 9 and the motor bracket 4a are assembled by screwing. Thus, the hub is rigidly fixed with respect to the rotational and axial directions.

5 and 6, a structure for fixing the rotational direction (circular direction) of the vane structure 8 will be described.

As described above, in this embodiment, the vane structure 8 may be provided as a member separate from the hub 9. Therefore, an appropriate structure for fixing the vane structure 8 is required. In this embodiment, a structure for fixing the vane structure 8 without using a fastening structure such as a screw is proposed.

In detail, it is as follows.

The impeller 5 rotates at high speed, and thus the flow from the impeller 5 is strong in the direction of rotation. Therefore, when the flow from the impeller 5 passes through the vane 84 of the diffuser 6a, the force received by the vane 84 in the rotational direction is also strong. Accordingly, the force received by the vane body 82 provided with a plurality of vanes 84 in the rotational direction is also strong. Therefore, it is desirable to firmly fix the vane body 82.

The vane body 82 may be fixed by the motor bracket 4a. However, in this embodiment, the vane body 82 may be fixed to the motor bracket 4a without screwing.

Because, as described above, when the vane body 82 is seated on the motor bracket 4a, the fitting portion 45 of the motor bracket 4a is fitted into the groove 86 of the vane body 82. Therefore, even if the vane body 82 receives a strong force in the rotational direction, the vane body 82 is prevented from rotating by the fitting portion 45 of the motor bracket 4a. Therefore, the vane body 82 is firmly fixed in the direction of rotation.

In the above-described embodiment, a structure in which the vane structure 8 is fixed without using a fastening structure such as a screw has been described. However, the present invention is not limited thereto, and it is also possible to fix the vane structure 8 using a fastening structure such as a screw.

7 and 8, the axial fixing structure of the vane structure 8 will be described.

In this embodiment, a structure for fixing the vane body 82 is proposed without using a fastening structure such as a screw.

The vane body 82 is supported by the impeller housing 7. In addition, the vane body 82 is supported by the motor bracket 4a. For example, the upper part of the vane body 82 may be supported by the impeller housing 7, and the lower part of the vane body 82 may be supported by the motor bracket 4a.

In this state, the impeller housing 7 and the other part of the fan motor, for example, the motor housing 3 are coupled, so that the vane body 82 can be more firmly fixed in the axial direction.

In detail, it is as follows.

The impeller housing 7 may be provided with a portion for supporting the vane body 82. For example, a predetermined step 72 may be provided on the inner surface of the impeller housing 7. In addition, the upper portion 82a of the vane body 82 may be supported on the step 72 of the impeller housing 7. Furthermore, the inner diameter of the impeller housing 7 and the outer diameter of the vane body 82 may correspond.

In addition, the lower portion of the vane body 82 may be supported by the motor bracket 4a. In addition, as described above, since the fitting portion 45 of the motor bracket 4a is fitted in the groove 86 of the vane body 82, the lower portion of the vane body 82 is more firmly supported by the motor bracket 4a. Can be.

In this state, the impeller housing 7 is engaged with the motor housing 3. The impeller housing 7 may be screwed or pressed into the motor housing 3 to be coupled to each other.

That is, while the vane body 82 is supported by the impeller housing 7, the impeller housing 7 and the motor housing 3 are coupled in the axial direction. Then, the main body 82 supported by the impeller housing 7 receives a force in the axial direction. Accordingly, the upper surface 82a of the main body 82 receives force in the axial direction by the step 72 of the impeller housing 7. Accordingly, the vane body 82 can be firmly fixed in the axial direction without a separate fastening structure such as screw fastening.

In this embodiment, a step 72 is made in the impeller housing 7 and the vane body 82 is supported by the impeller housing 7 by using this. However, the present invention is not limited thereto, and the impeller housing 7 and the vane body 82 may be supported in other ways.

On the other hand, the vane 84 provided in the vane body 82, particularly the four-flow vane 842 may be seated on the upper portion 954 of the hub 9 and fixed in the axial direction.

On the other hand, according to this embodiment, the vane 84 is located inside the ring-shaped vane body 82. Accordingly, the air coming out of the impeller 5 flows between the inside of the ring-shaped vane body 82 and the outside of the hub 9. Therefore, the air flow can be guided more smoothly.

In this embodiment, a diffuser having an axial flow type four flow type vane has been described. However, the present invention is not limited thereto, and it is possible to apply the principles of the present invention to a diffuser having only an axial flow type vane.

In the other parts that are not described, the matters of the embodiment described above may be equally applied. In addition, unless the matters are arranged with each other, even if there is no special mention, technical matters described in one embodiment may be equally applied in other embodiments.

The above-described embodiments and drawings are used to aid understanding of the present invention. Accordingly, the present invention is not limited to the embodiments described above, and various modifications and variations are possible from these descriptions to those of ordinary skill in the art to which the present invention pertains, and these modifications and variations are the scope of the present invention. .

For example, in the above-described embodiment, a fan motor for a cleaner has been described, but the present invention is not limited thereto. For example, it is also possible to use in home appliances, automobiles, etc. other than the above-described fan motor vacuum cleaner.

2: motor 3: motor housing
4, 4a: motor bracket 5: impeller
6, 6a: diffuser 7: impeller housing

Claims (24)

A motor housing accommodating a motor;
A motor bracket disposed on the upper side of the motor housing;
An impeller coupled to the shaft of the motor;
A fan motor comprising a diffuser disposed between the motor and the impeller and having a vane body, an axial flow type vane provided on an inner circumference of the vane body, and a four-flow type vane provided above the axial flow type vane. The fan motor of claim 1, wherein the vane body is a hollow ring, the axial flow vane is provided on an inner surface of the ring, and a four flow vane is provided on the upper side of the axial flow vane. The fan motor according to claim 2, wherein the vane body, the axial flow vane and the four flow vane are integrally injection-molded. The fan motor of claim 3, wherein a hub is provided inside the vane body, and a shape of an upper portion of the outer circumference of the hub corresponds to a shape of the four-flow vane. The fan motor of claim 4, wherein the hub is injection-molded. The fan motor of claim 5, wherein a groove is provided in the vane body, and a fitting portion corresponding to the groove is provided in the motor bracket. The method of claim 6, wherein the groove comprises at least one of a first groove provided in a circumferential direction and a second groove provided in an axial direction, and the fitting part comprises a first fitting part corresponding to the first groove and the A fan motor comprising at least one of the second fitting portions corresponding to the second groove. The fan motor according to claim 7, wherein the motor bracket comprises a bearing housing, a support part, and a bridge connecting the bearing housing and the support part, and the fitting part extends radially from the support part. . The fan motor according to claim 8, wherein a screw fastening groove is provided in the first fitting part. The fan motor of claim 8, wherein one end of the second fitting part is connected to a side surface of the bridge. The fan motor according to any one of claims 6 to 10, wherein a vane body of the diffuser is supported inside the impeller housing. The fan motor according to claim 11, wherein an upper portion of the vane body is supported on an inner surface of the impeller housing. The fan motor of claim 12, wherein a step is provided on an inner surface of the impeller housing, and an upper portion of the vane body is supported at the step. The fan motor according to claim 13, wherein the vane body is fixed in the axial direction by a combination of the impeller housing and the motor housing. The fan motor of claim 14, wherein an outer diameter of the vane body corresponds to an inner diameter of the impeller housing. A motor housing accommodating a motor;
A motor bracket disposed on the upper side of the motor housing;
An impeller coupled to the shaft of the motor;
An impeller housing accommodating the impeller;
It includes a diffuser disposed between the motor and the impeller,
The diffuser is a fan motor including a vane body supported on the inside of the impeller and a vane provided on an inner circumference of the vane body of the vane body. The fan motor according to claim 16, wherein the vane includes an axial flow type vane and a four-flow type vane provided above the axial flow type vane. The fan motor of claim 17, wherein a step is provided on an inner surface of the impeller housing, and an upper portion of the vane body contacts the step. 19. The fan motor according to claim 18, wherein an inner diameter of the impeller housing and an outer diameter of the vane body correspond. The fan motor according to claim 18 or 19, wherein a hub is provided inside the vane body, and an upper surface of the outer circumference of the hub supports the four-flow vane. 21. The fan motor of claim 20, wherein a groove is provided in the hub, and a fitting portion corresponding to the groove is provided in the motor bracket. 22. The fan motor according to claim 21, wherein the vane body is fixed in the axial direction by the combination of the impeller housing and the motor housing. A first step of making a vane body having a hollow portion and having a vane around the inner circumference;
A method of manufacturing a fan motor comprising a second step of assembling a hub in the hollow portion of the vane body. The method of claim 23, wherein in the second step, the hub is coupled to a motor bracket, and the motor bracket is fitted to a lower portion of the vane body so that the vane body is fixed in a circumferential direction, and an upper portion of the vane body is A method of manufacturing a fan motor, characterized in that it is supported by the impeller housing and the vane body is fixed in the axial direction.

Images