US20180335049A1

US20180335049A1 - Fan

Info

Publication number: US20180335049A1
Application number: US15/974,755
Authority: US
Inventors: Zhaowu GU; Dongxu Zhang
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2017-05-22
Filing date: 2018-05-09
Publication date: 2018-11-22
Also published as: DE102018207541A1

Abstract

A fan includes a motor portion having a shaft which rotates by taking a central axis as a center, an impeller portion configured at a side of the motor portion along the axial direction and connected with the shaft, and an upper cover portion configured at a radial outside of the impeller portion and in which the impeller portion is accommodated, the upper cover portion including an outside air guide wall portion located at a radial outside of the impeller portion, an inside air guide wall portion located at a radial inside of the outside air guide wall portion and having an air suction port which penetrates in an axial direction, and a plurality of connecting portions connected with the outside air guide wall portion and the inside air guide wall portion, characterized in that the impeller portion has a side wall portion which rotates by taking a central axis as a center, an upper wall portion located at a side of the side wall portion along the axial direction and extending along a radial direction, a plurality of wing portions extending along radially outside from the side wall portion, and a plurality of pressurizing wings configured at a side of the upper wall portion along the axial direction. With the structure of the fan, the air suction wind volume of the air suction port of the fan can be improved, and the exhaust efficiency can be increased.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of priority to Chinese Patent Application No. 201710364187.7 filed on May 22, 2017, Chinese Patent Application No. 201720574613.5 field on May 22, 2017 and Chinese Patent Application No. 201810359446.1 filed on Apr. 20, 2018. The entire contents of these applications are hereby incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present disclosure relates to the fan field, and in particular to a fan.

2. Description of the Related Art

A brushed motor is generally adopted to drive an impeller of a household hair dryer (referred to as a fan); however in order to pursue a long lifetime, a high speed and a low electric wave, a brushless motor becomes necessary. As thus, a design with a higher air flow volume and a higher static pressure are demanded.
It should be noted that the above introduction to the technical background is just to facilitate a clear and complete description of the technical solution of the present disclosure, and is elaborated to facilitate the understanding of persons skilled in the art. It cannot be considered that the above technical solutions are known by persons skilled in the art just because these solutions are elaborated in the Background of the present disclosure.

SUMMARY OF THE INVENTION

In order to solve the above problem mentioned in the Background, the embodiments of the present disclosure provide a fan, so as to improve an air flow volume and a static pressure at an air suction port of the fan and to improve the exhaust efficiency.
According to a first aspect of the embodiments of the present disclosure, a fan is provided, and the fan includes:
a motor portion having a shaft which rotates by taking a central axis as a center,
an impeller portion configured at a side of the motor portion along an axial direction and connected with the shaft,
and an upper cover portion configured at a radial outside of the impeller portion and in which the impeller portion is accommodated,
the upper cover portion including an outside air guide wall portion located at the radial outside of the impeller portion, an inside air guide wall portion located at a radial inside of the outside air guide wall portion and having an air suction port which penetrates in the axial direction, and a plurality of connecting portions connected with the outside air guide wall portion and the inside air guide wall portion,
wherein,
the impeller portion has a side wall portion which rotates by taking the central axis as a center, an upper wall portion located at a side of the side wall portion along the axial direction and extending along a radial direction, a plurality of wing portions extending along radially outside from the side wall portion, and a plurality of pressurizing wings configured at a side of the upper wall portion along the axial direction.
An advantageous effect of the present disclosure lies in that by adding a cover portion (the upper cover portion, including the air guide wall portion, the air suction port and the connecting portions) at a top surface (a side of an axial direction) of a motor of a fan, by providing the cover portion and the pressurizing wings of the impeller portion, an air flow volume and a static pressure of the air suction port are improved, whereby the exhaust efficiency can be improved.
Referring to the later description and figures, a specific embodiment mode of the present disclosure is disclosed in detail, indicating a manner that the principle of the present disclosure can be adopted. It should be understood that the embodiment mode of the present disclosure is not limited in terms of the scope. Within the scope of the appended claims, the embodiment mode of the present disclosure includes many changes, modifications and equivalents.
Features that are described and/or illustrated with respect to one embodiment mode may be used in the same way or in a similar way in one or more other embodiment modes and in combination with or instead of the features of the other embodiment modes.
It should be emphasized that the term “include/comprise”when used in this Description specifies the presence of features, integers, steps or components, but does not preclude the presence or addition of one or more other features, integers, steps or components.
The above and other elements, features, steps, characteristics and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

An element and a feature described in a figure or an embodiment mode of the present embodiments of the present disclosure can be combined with an element and a feature shown in one or more other figures or embodiment modes. In addition, in the figures, similar numerals represent corresponding components in several figures, and can be used to indicate corresponding components used in more than one embodiment mode.

The included figures are used to provide a further understanding on the embodiments of the present disclosure, constitute a part of the Description, are used to illustrate the embodiment modes of the present disclosure, and expound together with the text description the principle of the present disclosure. Obviously, the figures in the following description are only some embodiments of the present disclosure. Persons skilled in the art can also obtain other figures based on these figures under the premise that they do not pay inventive labor. In the figures:

FIG. 1 is an exploded schematic diagram of a fan of the Embodiment 1.

FIG. 2 is another exploded schematic diagram of the fan of the Embodiment 1.

FIG. 3 is a sectional diagram of the fan of the Embodiment 1.

FIG. 4 is a schematic diagram of an upper cover portion of the fan of the Embodiment 1.

FIG. 5 is a schematic diagram of an impeller portion of the fan of the Embodiment 1.

FIG. 6 is a schematic diagram of a lower cover portion of the fan of the Embodiment 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to the drawings, through the following Description, the above and other features of the embodiments of the present disclosure will become apparent. The following description and drawings specifically disclose the specific embodiment mode of the embodiments of the present disclosure, showing a partial embodiment mode which can adopt the principle of the embodiments of the present disclosure. It should be understood that the embodiments of the present disclosure are not limited to the described embodiment modes, on the contrary, the embodiments of the present disclosure include all the modifications, variations, and equivalents falling within the scope of the appended claims.
In the embodiments of the present disclosure, the term “first” and “second”, etc. are used to distinguish different elements in terms of appellation, but do not represent a spatial arrangement or time sequence, etc. of these elements, and these elements should not be limited by these terms. The term “and/or” includes any and all combinations of one or more of the associated listed terms. The terms “include”, “comprise” and “have”, etc. specify the presence of stated features, elements, members or components, but do not preclude the presence or addition of one or more other features, elements, members or components.
In the embodiments of the present disclosure, the singular forms “a/an” and “the”, etc. include plural forms, and should be understood broadly as “a kind of” or “a type of”, but not be defined as the meaning of “one”; in addition, the term “the” should be understood to include both the singular forms and the plural forms, unless the context clearly indicates otherwise. In addition, the term “according to” should be understood as “at least partially according to . . . ”, the term “based on” should be understood as “at least partially based on . . . ”, unless the context clearly indicates otherwise.
In the embodiments of the present disclosure, for ease of description, a direction parallel to a direction extending along a shaft is referred to as “an axial direction”, a radius direction taking the shaft as a center is referred to as “a radial direction”, and a circumferential direction taking the shaft as a center is referred to as “a circumferential direction”; however these are just for ease of description and do not limit orientations when a fan is used and manufactured.
The various implementations of the embodiments of the present disclosure will be described below with reference to the drawings. These implementations are only exemplary and do not limit on the embodiments of the present disclosure.
The present embodiment provides a fan. FIG. 1 is an exploded schematic diagram of the fan, FIG. 2 is another exploded schematic diagram of the fan, and FIG. 3 is a sectional diagram of the fan.
As shown in FIG. 1 to FIG. 3, the fan includes a motor portion 100, an impeller portion 200 and an upper cover portion 300; the motor portion 100 has a shaft 101 which rotates by taking a central axis O as a center, the impeller portion 200 is configured at a side of the motor portion 100 along an axial direction and is connected with the shaft 101, and the upper cover portion 300 is configured at a radial outside of the impeller portion 200 and in which the impeller portion 200 is accommodated.
In the present embodiment, the upper side shown in FIG. 3 is referred to as “a side along an axial direction”, the lower side shown in FIG. 3 is referred to as “the other side along an axial direction”, such definitions are just for ease of description and do not constitute limitations on the present application.
FIG. 4 is a schematic diagram of the upper cover portion 300 of the fan, as shown in FIGS. 1-4, in the present embodiment, the upper cover portion 300 includes an outside air guide wall portion 301, an inside air guide wall portion 302 and a plurality of connecting portions 303. The outside air guide wall portion 301 may be of a cylindrical shape and is located at a radial outside of the impeller portion 200. The inside air guide wall portion 302 may also be of a cylindrical shape, is located at a radial inside of the outside air guide wall portion 301, and has an air suction port 304 which penetrates in the axial direction. The plurality of connecting portions 303 are connected with the outside air guide wall portion 301 and the inside air guide wall portion 302.
In the present embodiment, the cylindrical shape may be cylindrical shapes having the same diameter, but are not limited thereto, and may also be cylindrical shapes having a gradually changing diameter or different diameters. As shown in FIG. 4, the inside air guide wall portion 302 is of a shape of an upside-down bowl, a portion thereof (the bottom of the bowl) has the same diameter and is of a cylindrical shape, while the diameter of the other portion (the bowl body part) gradually becomes larger from a side to the other side along the axial direction.
FIG. 5 is a schematic diagram of the impeller portion 200 of the fan, as shown in FIGS. 1-3 and 5, in the present embodiment, the impeller portion 200 includes a side wall portion 201, an upper wall portion 202, a plurality of wing portions 203 and a plurality of pressurizing wings 204. The side wall portion 201 may be of a cylindrical shape and also rotates by taking the central axis O as a center. The upper wall portion 202 is located at a side of the side wall portion 201 along the axial direction and extends along a radial direction. The plurality of wing portions 203 extend along radially outside from the side wall portion 201. The plurality of pressurizing wings 204 are configured at a side of the upper wall portion 202 along the axial direction.
Via this structure, air entering from the air suction port 304 not only has an axial flow channel (the straight arrow as shown in FIG. 3), but also forms a vortex channel (the dashed arrow as shown in FIG. 3), by combining with the axial flow channel formed by air entering from the upper cover portion 300 (the straight arrow as shown in FIG. 3), a design of using a mixing technique of an axial flow and a vortex to improve an air flow volume and a static pressure of a fan is achieved. Whereby, through the settings of the upper cover portion 300 and the pressurizing wings 204, the air flow volume and the static pressure of the air suction port are improved and the exhaust efficiency is improved.
In the present embodiment, no limitation on the structure of the motor portion 100 is made, the related art can be referenced for details.
The upper cover portion 300 of the fan of the present embodiment will be described below with reference to FIGS. 1-4.
In the present embodiment, no limitation on the structure of the inside air guide wall portion 302 of the upper cover portion 300 is made, and it may be a structure in a cylindrical shape and may also be a structure in a shape of an upside-down bowl, as shown in FIG. 4.
In the present embodiment, as shown in FIG. 3, an end portion of the other side (the lower side as shown in FIG. 3) of the inside air guide wall portion 302 of the upper cover portion 300 along the axial direction and an end portion of a side (the upper side as shown in FIG. 3) of the side wall portion 201 of the impeller portion 200 along the axial direction are opposed in a radial direction. Whereby, as shown in FIG. 3, a gap (the gap “B” as shown in FIG. 3) is formed between the inside air guide wall portion 302 and the side wall portion 201 (in a radial direction), such that the air entering from the air suction port 304 is guided to the other side along the axial direction, that is, flows downwards as shown in FIG. 3, to avoid generation of an airflow in a horizontal direction as shown in FIG. 3 to affect air flow volume noise.
In the present embodiment, as shown in FIG. 3, an end portion of the other side (the lower side as shown in FIG. 3) of the inside air guide wall portion 302 of the upper cover portion 300 along the axial direction, an end portion of a side (the upper side as shown in FIG. 3) of the side wall portion 201 of the impeller portion 200 along the axial direction and at least a part of each of the wing portions 203 of the impeller portion 200 are opposed in a radial direction. Whereby, as shown in FIG. 3, a gap (the gap “A” as shown in FIG. 3) is formed between the wing portions 203 and the inside air guide wall portion 302 (in a radial direction), meanwhile a gap (the gap “B” as shown in FIG. 3) is also formed between the inside air guide wall portion 302 and the side wall portion 201 (in a radial direction), such that interference between the wing portions 203 and the inside air guide wall portion 302 can be prevented.
In the present embodiment, no limitation on the structure of the connecting portions 303 is made, they may be set to be a hollowed-out structure as shown in FIGS. 1-2 and 4, may also be set to be other structures, as long as the inside air guide wall portion 302 and the outside air guide wall portion 301 may be connected via the connecting portions 303. Moreover, in the present embodiment, no limitation on the number of the connecting portions 303 is made, they may be set to be three as shown in FIGS. 1-2 and 4, may also be set to be in other quantity.
The impeller portion 200 of the fan of the present embodiment will be described below with reference to FIGS. 3 and 5.
In the present embodiment, as shown in FIG. 5, a plurality of holes 205 which penetrate in an axial direction may also be provided on the upper wall portion 202 of the impeller portion 200. Whereby, the heat dissipation effect can be improved. That is to say, a part of air entering from the air suction port 304 is sent to the motor portion 100 via the plurality of holes 205, thereby enabling to cool the motor portion 100.
In the present embodiment, no limitation on the number of the wing portions 203 of the impeller 200 is made, they may be set to be seven as shown in FIG. 5, may also be set to be in other quantity.
In the present embodiment, no limitation on the number of the pressurizing wings 204 is made, they may be set to be odd, for example five as shown in FIG. 5, may also be set to be in other quantity. Whereby, the heat dissipation effect can be improved.
In the present embodiment, as observed in an axial direction, at least a part of each of the pressurizing wings 204 is accommodated at an inner side of the inside air guide wall portion 302. That is to say, as shown in FIG. 3, a part of the pressurized wings 204 can be seen from the air suction port 304. Whereby, the air entering from the air suction port 304 may form a vortex channel through being guided by the pressurizing wings 204, thus to increase an air suction volume. In addition, since the plurality of pressurizing wings 204 are accommodated inside the inside air guide wall portion 302, thus an axial length of a fan can be shortened, thereby enabling to realize miniaturization of the fan.
In the present embodiment, as observed in an axial direction, at least a part of each of the pressurizing wings 204 and the air suction port 304 are opposed in an axial direction. As shown in FIG. 3, the air suction port 304 and a part of the pressurizing wings 204 which can be seen from the air suction port 304 are opposed in an axial direction (i.e. the up and down direction as shown in FIG. 3). Whereby, the air entering from the air suction port 304 may be ensured to be guided by the pressurizing wings 204, thus to form the vortex channel.
In one implementation, the pressurizing wings 204 are configured to incline in a circumferential direction by taking the central axis O as a center. For example, the pressurizing wings 204 may be configured to curve from a radial inner side to a radial outer side. In this way, by configuring the pressurizing wings 204 to curve, introduction of the air coming from the air suction port 304 can be promoted. Moreover, the pressurizing wings 204 are not limited to be configured to be curved surfaces, and can be also configured to incline with respect to the central axis O.
In one implementation, the number of the pressurizing wings 204 and the number of the wing portions 203 may be different. In the present implementation, the number of the pressurizing wings 204 is five, and the number of the wing portions 203 is seven. By making the number of the pressurizing wings 204 and the number of the wing portions 203 be different, interference between the pressurizing wings 204 and the wing portions 203 during rotating can be restrained, thereby to reduce noise.
In one implementation, the number of the pressurizing wings 204, the number of the wing portions 203 and the number of the connecting portions 303 may be different. In the present implementation, the number of the pressurizing wings 204 is five, the number of the wing portions 203 is seven, and the number of the connecting portions 303 is three. By making the number of the pressurizing wings 204, the number of the wing portions 203 and the number of the connecting portions 303 be different, interference among the pressurizing wings 204, the wing portions 203 and the connecting portions 303 during rotating can be restrained, thereby to reduce noise.
In the present embodiment, as shown in FIGS. 1-3, the fan may further include a lower cover portion 400 which may be configured at the other side (the lower side as shown in FIG. 3) of the upper cover portion 300 along the axial direction and is connected with an end portion of the other side of the upper cover portion 300 along the axial direction. The present embodiment does not make limitations on a connecting manner of the upper cover portion 300 and the lower cover portion 400. Whereby, through a combination of the upper cover portion 300 and the lower cover portion 400, the internal structure of the fan may be covered, to avoid a damage to a component caused by the internal construction of the fan being in directly contact with the outside.
FIG. 6 is a schematic diagram of the lower cover portion 400 of the fan, as shown in FIG. 6, in the present embodiment, the lower cover portion 400 may include a lower wall portion 401, a tower portion 402 and a plurality of static wing portions 403. The lower wall portion 401 may be of a cylindrical shape, such as a cylindrical shape having a gradually changing diameter, and extends in a circumferential direction by taking a central axis O as a center. The tower portion 402 is located at a radial inside of the lower wall portion 401. The plurality of static wing portions 403 are connected with the lower wall portion 401 and the tower portion 402. Whereby, a structure similar to a base is formed to support the motor portion 100 and the impeller portion 200.
In the present embodiment, similar to the connecting portions 303 of the upper cover portion 300, no limitations on the number and structure of the plurality of static wing portions 403 are made, they may be formed through various enforceable manners, the present embodiment only illustrates one structure and the number therein through FIG. 6.
In the present embodiment, a side (the upper side as shown in FIG. 3) of the tower portion 402 along the axial direction is provided with a substrate, and the substrate may be served as a substrate of the motor portion 100, may also be served as a carrier of a control circuit, is electrically connected with the motor portion 100 and drives the motor portion 100 to work. In the present embodiment, the tower portion 402 and the substrate may be fixed by welding, but the present embodiment is not limited thereto.
With the structure of the fan of the present embodiment, the air flow volume and the static pressure of the air suction port of the fan are improved and the exhaust efficiency is improved.
The present embodiment provides a blower having the fan according to Embodiment 1. In addition, the blower also has conventional components of other blowers, such as a power supply interface and a power supply line, etc. The present embodiment does not make limitations on structures, setting manners and functions of these conventional components, the related art can be referenced.
With the structure of the fan of the blower of the present embodiment, the air volume and the static pressure of the air suction port of the fan are improved and the exhaust efficiency is improved.
The present disclosure has been described herein above with reference to the specific embodiment modes, however persons skilled in the art should clearly know that the description is exemplary and does not limit the protection scope of the present disclosure. Persons skilled in the art can make various variations and modifications to the present disclosure based on the principle of the present disclosure, these variations and modifications are also within the scope of the present disclosure.

Claims

What is claimed is:

1. A fan, comprising:

a motor portion having a shaft which rotates by taking a central axis as a center,

an impeller portion configured at a side of the motor portion along an axial direction and connected with the shaft, and

an upper cover portion configured at a radial outside of the impeller portion and in which the impeller portion is accommodated,

the upper cover portion comprising an outside air guide wall portion located at a radial outside of the impeller portion, an inside air guide wall portion located at a radial inside of the outside air guide wall portion and having an air suction port which penetrates in the axial direction, and a plurality of connecting portions connected with the outside air guide wall portion and the inside air guide wall portion,

characterized in that

the impeller portion has a side wall portion which rotates by taking a central axis as a center, an upper wall portion located at a side of the side wall portion along the axial direction and extending along a radial direction, a plurality of wing portions extending along radially outside from the side wall portion, and a plurality of pressurizing wings configured at a side of the upper wall portion along the axial direction.

2. The fan according to claim 1, characterized in that a plurality of holes which penetrate in the axial direction are provided on the upper wall portion.

3. The fan according to claim 1, characterized in that the number of the pressurizing wings is odd.

4. The fan according to claim 1, characterized in that as observed in the axial direction, at least a part of each of the pressurizing wings is accommodated at an inside of the inside air guide wall portion.

5. The fan according to claim 1, characterized in that as observed in the axial direction, at least a part of each of the pressurizing wings and the air suction port are opposed in an axial direction.

6. The fan according to claim 1, characterized in that an end portion of the other side of the inside air guide wall portion along the axial direction and an end portion of a side of the side wall portion along the axial direction are opposed in a radial direction.

7. The fan according to claim 6, characterized in that an end portion of the other side of the inside air guide wall portion along the axial direction, an end portion of a side of the side wall portion along the axial direction and at least a part of each of the wing portions are opposed in a radial direction.

8. The fan according to claim 1, characterized in that the fan further comprises:

a lower cover portion configured at the other side of the upper cover portion along the axial direction and connected with an end portion of the other side of the upper cover portion along the axial direction.

9. The fan according to claim 8, characterized in that the lower cover portion comprises a lower wall portion extending in a circumferential direction by taking a central axis as a center, a tower portion located at a radial inside of the lower wall portion, and a plurality of static wing portions connected with the lower wall portion and the tower portion.

10. The fan according to claim 9, characterized in that a side of the tower portion along the axial direction is provided with a substrate.

11. The fan according to claim 10, characterized in that the tower portion and the substrate are fixed by welding.