CN110714931A

CN110714931A - Fan and electric device with fan

Info

Publication number: CN110714931A
Application number: CN201810768970.4A
Authority: CN
Inventors: 马强
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2018-07-13
Filing date: 2018-07-13
Publication date: 2020-01-21
Anticipated expiration: 2038-07-13
Also published as: CN110714931B

Abstract

The embodiment of the invention provides a fan and electrical equipment with the same. The fan includes: a motor portion that rotates around a central axis; a mounting portion supporting the motor portion; and an impeller portion that rotates around the central axis in accordance with rotation of the motor portion, the impeller portion having: a cup part which receives the motor part and rotates along with the rotation of the motor part; a blade support portion extending radially outward from an outer periphery of the cup portion; and a plurality of blades arranged on the blade support portion at intervals in the circumferential direction, the blade support portion having a plurality of holes and a plurality of ribs, the holes and the ribs being alternately arranged in the circumferential direction, at least a part of the radially inner sides of the plurality of blades being arranged on the surface of one side in the axial direction of the plurality of ribs. According to the embodiment of the invention, air can be fed from two sides of the fan, and the manufacturing cost is reduced while the heat dissipation performance of the fan is maintained.

Description

Fan and electric device with fan

Technical Field

The invention relates to the technical field of heat dissipation, in particular to a fan and electrical equipment with the same.

Background

Fans are widely installed in electrical appliances such as home appliances and office automation equipment. In the prior art, the intake and exhaust of the fan are realized by a plurality of blades, and the heat dissipation of the electrical equipment is realized by the intake and exhaust of the fan.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

Disclosure of Invention

The inventors have found that it is desirable for manufacturers of fans or electrical equipment to increase the heat dissipation performance of the fan or to reduce the manufacturing cost while maintaining the heat dissipation performance of the fan.

In order to solve at least one of the above problems, embodiments of the present invention provide a fan and an electric apparatus having the same, which can intake air from both sides of the fan and reduce manufacturing costs while maintaining heat dissipation performance of the fan.

According to a first aspect of embodiments of the present invention, there is provided a fan including: a motor portion that rotates around a central axis; a mounting portion supporting the motor portion; and an impeller portion that rotates around the central axis in accordance with rotation of the motor portion, the impeller portion having: a cup part which receives the motor part and rotates along with the rotation of the motor part; a support portion extending radially outward from an outer periphery of the cup portion; and a plurality of blades arranged on the support portion at predetermined intervals in the circumferential direction, the support portion having a plurality of holes and a plurality of ribs, the holes and the ribs being alternately arranged in the circumferential direction, at least a part of the radially inner sides of the plurality of blades being arranged on the surface of one side of the rib in the axial direction.

In one embodiment, the circumferential extent of the rib is greater than the circumferential extent of the blade.

In one embodiment, the rib and the blade are each curved when viewed in the axial direction, and the curvature of the rib is the same as the curvature of the blade.

In one embodiment, the hole portions are respectively disposed on both circumferential sides of at least a portion of the radially inner side of each blade.

In one embodiment, the number of the blades is the same as the number of the ribs.

In one embodiment, the hole is a square when viewed in the axial direction.

In one embodiment, the hole portion has a circumferential width on a radially inner side smaller than a circumferential width on a radially outer side.

In one embodiment, the plurality of holes are arranged at equal intervals in the circumferential direction.

In one embodiment, a ratio of a total area of the plurality of hole portions to an area of the blade support portion is 9.6%.

In one embodiment, the impeller portion further includes an annular rib which is formed in an annular shape and is disposed at an end portion of the plurality of blades on a side away from the blade support portion.

In one embodiment, the mounting portion has a disk-shaped base portion, a motor support portion supporting the motor portion is provided at a center of the base portion, a plurality of first through holes are provided in the base portion in a circumferential direction on a radially outer side of the motor support portion, a cross-shaped cross-connecting portion is provided in each of the first through holes, and the cross-connecting portion divides each of the first through holes into a plurality of second through holes.

In one embodiment, the cross-connecting portion divides each of the first through-holes into four second through-holes.

In one embodiment, the plurality of blades are arranged at equal intervals in the circumferential direction.

According to a second aspect of embodiments of the present invention, there is provided an electrical apparatus comprising the fan of the first aspect described above.

The embodiment of the invention has the advantages that air can be fed from two sides of the fan, and the manufacturing cost is reduced while the heat dissipation performance of the fan is maintained.

Embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising/comprises/having" when used herein, is taken to specify the presence of stated features, integers or components, but does not preclude the presence or addition of one or more other features, integers or components.

Drawings

The above and other objects, features and advantages of the embodiments of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic exploded perspective view of a fan in embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view of the fan of embodiment 1 of the present invention along the X-X direction in fig. 1.

Fig. 3 is a schematic view of the impeller portion of example 1 of the present invention as viewed from one axial side.

Fig. 4 is a schematic view of the impeller portion of example 1 of the present invention as viewed from the other side in the axial direction.

Fig. 5 is a partially enlarged view of a portion within a dashed line frame in fig. 3.

Detailed Description

The foregoing and other features of the invention will become apparent from the following description taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the embodiments in which the principles of the invention may be employed, it being understood that the invention is not limited to the embodiments described, but is intended to cover all modifications and equivalents as fall within the scope of the appended claims.

In the embodiments of the present invention, the terms "first", "second", and the like are used for distinguishing different elements by name, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

In embodiments of the invention, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.

In the following description of the present invention, for the sake of convenience of description, a center line about which a rotating portion of a motor can rotate is referred to as a "center axis", a direction that is the same as or parallel to a direction extending along the center axis is referred to as an "axial direction", a radial direction about the center axis is referred to as a "radial direction", and a direction around the center axis is referred to as a "circumferential direction".

The following describes embodiments of the present invention with reference to the drawings.

Example 1

The present embodiment 1 provides a fan. Fig. 1 is an exploded perspective view of the fan of the present embodiment (in which a motor part 13 described below is not shown), fig. 2 is a sectional view of the fan of the present embodiment along the X-X direction in fig. 1, fig. 3 is a schematic view of the impeller part of the present embodiment when viewed along one side in the axial direction, fig. 4 is a schematic view of the impeller part of the present embodiment when viewed along the other side in the axial direction, and fig. 5 is a partially enlarged view of a portion within a broken line frame in fig. 3.

As shown in fig. 1 to 4, the fan 10 includes an impeller portion 11, a mounting portion 12, and a motor portion 13. The motor section 13 rotates about the center axis O-O; the mounting portion 12 supports the motor portion 13; the impeller portion 11 rotates about the central axis O-O in accordance with the rotation of the motor portion 13.

As shown in fig. 1 to 3, the impeller portion 11 has a cup portion 111, a blade support portion 112, and a plurality of blades 113.

As shown in fig. 2, the cup portion 111 houses the motor portion 13 and rotates with the rotation of the motor portion 13, the vane support portion 112 extends radially outward from the outer periphery of the cup portion 111, and the plurality of vanes 113 are arranged at predetermined intervals in the circumferential direction on the vane support portion 112.

As shown in fig. 1 and 3, the blade support portion 112 includes a plurality of holes 1121 and a plurality of ribs 1122, the holes 1121 and the ribs 1122 are alternately arranged in the circumferential direction, and at least a portion of the radially inner side of the plurality of blades 113 is arranged on one surface of the plurality of ribs 1122 in the axial direction.

As is apparent from the above-described embodiment, the provision of the holes 1121 in the blade support portion 112 allows the fan to intake air from both sides in the axial direction (i.e., the upper and lower sides in fig. 1), and the provision of the holes 1121 reduces the material used for the blade support portion 112, thereby reducing the cost of the material used for manufacturing the fan, and thus, the manufacturing cost can be reduced while maintaining the heat dissipation performance of the fan.

In the present embodiment, as shown in fig. 1 and 3, the amplitude in the circumferential direction of each rib 1122 may be set larger than the amplitude in the circumferential direction of each blade 113. In this way, each blade 113 can be surely arranged on each rib 1122.

In the present embodiment, the shape of the rib 1122 and the blade 113 can be arbitrarily set as required. For example, as shown in fig. 1 and 3, the rib 1122 and the vane 113 may be curved, i.e., have a certain curvature, when viewed in the axial direction. At this time, the curvature of the rib 1122 may be made the same as the curvature of the vane 113. Thus, the bending direction and the bending degree of the two can be consistent, the wind direction can be regulated, the generation of turbulent flow can be prevented, and the noise can be reduced. However, the present embodiment is not limited to this, and the rib 1122 and the vane 113 may be provided in other shapes, and the curvatures of the two may not be exactly the same, and may be substantially the same or different to meet actual requirements.

In the present embodiment, the hole portions 1121 may be respectively disposed on both circumferential sides of at least a portion of the radially inner side of each blade 113. For example, as shown in FIG. 3, a hole portion 1121-1 and a hole portion 1121-2 are respectively disposed on both sides of one of the blades 113-1 in the circumferential direction. Similarly, the other blades 113 have holes 1121 respectively formed in both circumferential sides. Illustratively, 113-1 shown in FIG. 3 is one of the plurality of blades 113, and 1121-1, 1121-2 shown in FIG. 3 is two of the plurality of hole portions 1121.

That is, if the hole portion 1121 is projected in the circumferential direction onto a curved surface on which the blade 113 adjacent to the hole portion 1121 is located, as viewed in the axial direction, at least a part of the projection of the hole portion 1121 onto the curved surface coincides with at least a part of the radially inner side of the blade 113.

For example, as shown in fig. 3 and 5, if the hole portion 1121-1 is projected in the circumferential direction (the circumferential direction is shown by a dotted line in fig. 5) onto a curved surface on which the blade 113-1 adjacent to the hole portion 1121 is located when viewed in the axial direction, at least a part of the projection of the hole portion 1121-1 onto the curved surface coincides with at least a part of the radially inner side of the blade 113-1; similarly, if the hole portion 1121-2 is projected in the circumferential direction onto a curved surface on which the blade 113-1 adjacent to the hole portion 1121-2 is located, as viewed in the axial direction, at least a part of the projection of the hole portion 1121-2 onto the curved surface also coincides with at least a part of the radially inner side of the blade 113-1.

Thus, the generation of turbulence can be prevented, and noise can be reduced.

Fig. 3 and 5 show the case where the entire hole portions 1121-1 and 1121-2 are disposed on both sides of the blade 113, that is, the case where all of the projections of the hole portions 1121-1 and 1121-2 on the curved surface on which the blade 113-1 is disposed overlap with a portion of the radially inner side of the blade 113-1, but the present embodiment is not limited thereto, and a portion of the radially outer side of the hole portions 1121-1 and 1121-2 may be disposed on both sides of the blade 113-1 and the other portion of the radially inner side may be disposed on the radially inner side of the innermost end of the blade 113-1, that is, a portion of the projections of the hole portions 1121-1 and 1121-2 on the curved surface on which the blade 113-1 is disposed (i.e., a portion of the radially outer side) overlaps with a portion of the radially inner side of the blade 113-1. This also prevents the occurrence of turbulence and reduces noise.

In the present embodiment, the number of vanes 113 may be the same as or different from the number of ribs 1122. When the two are the same, each blade 113 may be disposed on each rib 1122 such that one hole portion 1121 is disposed between each two adjacent blades 113, whereby the smoothness of the fan can be ensured. When they are different, at least two vanes 113 may be provided on the same rib 1122.

In the present embodiment, the hole portion 1121 may be provided in an arbitrary shape as viewed in the axial direction. For example, it may be quadrilateral, triangular, circular, etc. When the hole 1121 is formed in a square shape, it is advantageous to regulate the airflow, so as to obtain a better effect of preventing the turbulent flow and improve the performance of the fan.

In the present embodiment, the size of the hole portion 1121 may be arbitrarily set as required. In one embodiment, the hole portion 1121 may be configured to have a circumferential width on the radial inner side smaller than a circumferential width on the radial outer side, which may be beneficial to shaping the airflow, so as to obtain a better effect of preventing the turbulent flow and improve the performance of the fan.

In the present embodiment, the plurality of blades 113 may be arranged at equal or unequal intervals in the circumferential direction. In the case of being arranged at equal intervals, the smoothness of the fan can be ensured.

In the present embodiment, the plurality of hole portions 1121 may be arranged at equal or unequal intervals in the circumferential direction. When the holes 1121 are arranged at equal intervals, interference with the blade 113 can be avoided to the maximum extent.

In the present embodiment, the ratio between the sum of the areas of the plurality of hole portions 1121 and the area of the blade support portion 112 may be configured according to actual needs. For example, the ratio may be configured to be 9.6%. At this ratio, the fan can be ensured to have good performance while reducing the manufacturing cost of the fan. However, this embodiment is not limited thereto, and the ratio may be configured to other values as long as the fan can be ensured to obtain the required performance.

In the present embodiment, as shown in fig. 1 and 3, the impeller portion 11 may further include an annular rib 114, and the annular rib 114 may be formed in an annular shape and disposed at an end portion of the plurality of blades 113 on a side away from the blade support portion 112. The annular rib 114 ensures the strength of the fan.

In the present embodiment, as shown in fig. 1, the mounting portion 12 may have a disk-shaped base portion 121, a motor supporting portion 122 that supports the motor portion 13 is provided at the center of the base portion 121, a plurality of first through holes 123 are provided in the base portion 121 radially outward of the motor supporting portion 122 in the circumferential direction, a cross connecting portion 125 that is in a cross shape is provided in each of the first through holes 123, and each of the first through holes 123 is divided into a plurality of second through holes 124 by the cross connecting portion 125. This reduces vibration of the mounting portion 12 and ensures the strength of the mounting portion 12. In addition, since the cross-connecting portion 125 is formed in a cross shape, the number of materials used is reduced, and therefore, the material cost can be reduced.

In fig. 1, 3 first through holes 123 are taken as an example, but the embodiment is not limited thereto, and the number of the first through holes 123 may be other.

The cross connection 125 shown in fig. 1 crosses at an intermediate position to divide the first through-hole 123 into 4 second through-holes 124, but the present embodiment is not limited thereto. The cross connection 125 may cross at the end to divide the first through-hole 123 into 3 second through-holes 124. Alternatively, the cross-connecting portion 125 may be arranged to cross in another manner, and the first through-hole 123 may be divided into, for example, 5, 6, or more second through-holes 124.

In the present embodiment, as shown in fig. 1 and 2, a fixing portion 126 may be further provided on the base portion 121, and the fixing portion 126 is used for fixedly connecting the impeller 11 and the mounting portion 12 with other components of the electrical apparatus to which the fan is to be mounted. Three fixing portions 126 are shown in fig. 1, and the fixing portions 126 having a "C" shape are shown, but the number and shape of the fixing portions 126 are not limited in the present embodiment.

In the present embodiment, a circuit board (not shown) for processing a circuit related to the fan may be disposed between the motor portion 13 and the mounting portion 12, and thus, as shown in fig. 1, a wire guide portion 127 for guiding a wire drawn from the circuit board may be further disposed on the base portion 121, and the wire guide portion 127 may be located between two adjacent first through holes 123, and the shape of the wire guide portion 127 is not limited in the present embodiment.

The fan of the present embodiment can allow air to be introduced from both sides, and can reduce the manufacturing cost while maintaining the heat dissipation performance of the fan.

Example 2

This embodiment 2 provides an electric apparatus having the fan described in embodiment 1. Since the structure of the fan has been described in detail in embodiment 1, the contents thereof are incorporated herein and will not be described again.

The electric device of the present embodiment may be any electric device. For example, the system may be a home appliance or an office appliance such as a refrigerator, an air conditioner, a water dispenser, a washing machine, a compressor, a blower, and a blender, an industrial appliance such as a pump, a conveyor, a wind power generator, a grinding machine, and a traction motor, or various information processing appliances.

With the electric device of the present embodiment, the fan of the electric device can be caused to intake air from both sides, and the manufacturing cost can be reduced while maintaining the heat dissipation performance of the fan.

The embodiments of the invention have been described in detail above with reference to the accompanying drawings, which illustrate the manner in which the principles of the invention may be employed. It should be understood, however, that the practice of the present invention is not limited to the above-described embodiments, but includes all changes, modifications, equivalents, and the like, without departing from the spirit and scope of the present invention.

Claims

1. A fan, the fan comprising:

a motor portion that rotates around a central axis;

a mounting portion supporting the motor portion; and

an impeller portion that rotates about the central axis in accordance with rotation of the motor portion,

the impeller portion has:

a cup portion that houses the motor portion and rotates with rotation of the motor portion;

a blade support portion extending radially outward from an outer periphery of the cup portion; and

a plurality of blades arranged on the blade support portion at intervals in a circumferential direction,

it is characterized in that the preparation method is characterized in that,

the blade support portion has a plurality of holes and a plurality of ribs, the holes and ribs being alternately arranged in a circumferential direction,

at least a part of the radially inner side of the plurality of blades is disposed on the surface of one side in the axial direction of the plurality of ribs.

2. The fan as claimed in claim 1,

the circumferential extent of the rib is greater than the circumferential extent of the blade.

3. The fan as claimed in claim 1,

the rib and the blade are each curved when viewed in the axial direction, and the curvature of the rib is the same as the curvature of the blade.

4. The fan as claimed in claim 1,

the hole portions are respectively arranged on both circumferential sides of at least a part of the radially inner side of each of the blades.

5. The fan as claimed in claim 1,

the number of the blades is the same as the number of the ribs.

6. The fan as claimed in claim 1,

the hole portion is a quadrangle when viewed in the axial direction.

7. The fan as claimed in claim 1,

the hole portion has a circumferential width on a radially inner side smaller than a circumferential width on a radially outer side.

8. The fan as claimed in claim 1,

the plurality of holes are arranged at equal intervals in the circumferential direction.

9. The fan as claimed in claim 1,

the ratio between the sum of the areas of the plurality of hole portions and the area of the blade support portion was 9.6%.

10. The fan as claimed in claim 1,

the impeller portion further includes an annular rib that is formed in an annular shape and is disposed at an end portion of the plurality of blades on a side away from the blade support portion.

11. The fan as claimed in claim 1,

the mounting part has a disk-shaped base part, a motor supporting part for supporting the motor part is arranged at the center of the base part,

the base portion is provided with a plurality of first through holes along the circumferential direction on the radially outer side of the motor support portion, each of the first through holes is provided with a cross-shaped cross connecting portion, and the cross connecting portion divides each of the first through holes into a plurality of second through holes.

12. The fan as claimed in claim 11,

the cross-connecting portion divides each of the first through-holes into four second through-holes.

13. The fan as claimed in claim 1,

the plurality of blades are arranged at equal intervals in the circumferential direction.

14. An electrical apparatus having a fan according to any one of claims 1 to 13.