CN112431776A - Fan and domestic appliance with heat dissipation design - Google Patents

Abstract

The application provides a fan and domestic appliance with heat dissipation design, this fan include the casing and be located stator module and rotor subassembly in the casing, wherein, be provided with a plurality of protruding structures along the circumferential direction on the barrel inner wall of casing, protruding structure extends along the axial of fan. By utilizing the fan, the plurality of protruding structures are arranged on the inner wall of the fan, so that the contact area with wind is increased, and the air cooling effect of the fan is improved; and the axially extending convex structure can increase the strength of the shell.

Description

Fan and domestic appliance with heat dissipation design

Technical Field

The invention relates to the technical field of power parts, in particular to a fan with a heat dissipation design and a household appliance.

Background

With the development of society and the continuous improvement of living standard of people, the dust catcher has been used in more and more families as a household cleaning appliance. The dust collector is a device which utilizes a fan to drive blades to rotate at a high speed, generates air negative pressure in a sealed shell and absorbs dust and garbage. In the selection of cleaners, consumers tend to prefer high power, high speed, high suction cleaners. High power fans require good cooling conditions and the cooling effect on the fan will directly affect the efficiency, weight and life of the fan.

Disclosure of Invention

To the problem among the above-mentioned prior art, this application has provided a fan and domestic appliance with heat dissipation design, and it is through setting up protruding structure at the fan inner wall, increases the area of contact with wind, improves the cooling effect of fan.

In a first aspect, the present application provides a fan with a heat dissipation design, including a housing, and a stator assembly and a rotor assembly located in the housing, wherein, a plurality of protruding structures are provided on a cylinder inner wall of the housing along a circumferential direction, and the protruding structures extend along an axial direction of the fan. By utilizing the fan, the plurality of protruding structures are arranged on the inner wall of the fan, so that the contact area with wind is increased, and the air cooling effect of the fan is improved; and the axially extending convex structure can increase the strength of the shell.

In one possible embodiment of the first aspect, the protruding structures have smooth arc-shaped surfaces, and any two adjacent protruding structures are in smooth transition. Through this embodiment, smooth structural surface and transition surface are favorable to reducing the windage, reduce the wind pressure loss.

In one possible embodiment of the first aspect, a plurality of the raised structures are evenly distributed along the circumferential direction and the raised structures extend throughout the axial length of the housing.

In one possible embodiment of the first aspect, the protruding structure includes a sound-deadening chamber extending in an axial direction of the fan from an end of the protruding structure near the air outlet. Through this embodiment, the amortization chamber can cushion the vibration that produces when the fan drives the impeller high-speed rotation, and then reduces the noise of fan.

In one possible embodiment of the first aspect, the sound-deadening chamber has an axial length smaller than an axial length of the projection structure.

In one possible embodiment of the first aspect, the sound-deadening chamber is filled with a sound-deadening material. Through this embodiment, can further promote the noise cancelling effect of fan.

In one possible embodiment, the sound-deadening chamber is a closed cavity inside the protruding structure. Through this embodiment, the air in the cavity can absorb the inside noise of barrel effectively, can play the effect of noise abatement more high-efficiently like this.

In one possible embodiment of the first aspect, the end wall and the side wall of the housing together form at least one air inlet, and the opening of the air inlet is shaped like a scoop which is concave inwards, so that the air enters the housing along multiple directions; the shell comprises a cylinder body, a mounting seat and a mounting beam, the mounting beam is connected with the cylinder body and the mounting seat, and the cross section of the mounting seat is formed into a polygonal shape with at least one side being concave, so that the at least one air inlet is formed between the mounting seat and the cylinder body; the noise reduction coating is coated inside the fan shell.

In a second aspect, the present application further provides a household appliance comprising the blower of any one of the first aspect and possible embodiments thereof.

In one possible embodiment of the second aspect, the domestic appliance is a vacuum cleaner or a sweeping robot.

The application provides a fan and domestic appliance with heat dissipation design compares in prior art, has following beneficial effect:

(1) the contact area between the fan and the wind is increased by arranging the convex structures, so that the air cooling effect of the fan is improved; meanwhile, the strength of the shell can be increased by the axially extending convex structure;

(2) the silencing cavity is arranged in the protruding structure, so that vibration generated when the fan drives the impeller to rotate at a high speed can be buffered, and the noise of the fan is further reduced;

(3) through setting up at least one air intake of a plurality of directions, can form sharp air current passageway, the air current can flow effectively and treat refrigerated part through all fans, has further improved the cooling effect to fan internal element, has promoted the performance and the life of fan.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic view of a wind turbine according to an embodiment of the invention;

FIGS. 2 and 3 show perspective views of a housing of a blower according to an embodiment of the invention;

FIG. 4 shows a top view of a housing of a blower in accordance with an embodiment of the invention;

FIG. 5 illustrates a bottom view of a housing of a blower in accordance with an embodiment of the present invention;

fig. 6 illustrates a bottom view of an assembly of a housing of a wind turbine and a stator assembly and rotor assembly in accordance with an embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

List of reference numerals:

100-a fan; 110-a housing; 120-a fan framework; 130-a guide vane wheel; 140-a stator assembly; 150-a rotor assembly; 111-a cylinder; 112-a mount; 113-mounting a beam; 114-a raised structure; 115-a sound-deadening chamber; 1111-air inlet; 1121-mounting holes; 1122-alignment bumps.

Detailed Description

The invention will be further explained with reference to the drawings.

Fig. 1 is an external view of a fan 100 according to the present invention. As shown in fig. 1, the wind turbine 100 includes a housing 110, a wind turbine frame 120, and a guide vane wheel 130, and also shown in fig. 6 are a stator assembly 140 and a rotor assembly 150. In the assembled wind turbine 100, the guide vane wheel 130 is attached to one side of the wind turbine frame 120, the housing 110 is mounted around the exterior of the other side of the wind turbine frame 120, the stator assembly 140 and the rotor assembly 150 are positioned inside the housing 110, and the stator assembly surrounds the rotor assembly 150, as shown in FIG. 6.

As shown in fig. 2 and 3, the housing 110 includes a cylinder 111, a mount 112, and a mount beam 113, the mount beam 113 connecting the cylinder to the mount 112, in other words, the mount beam 113 supporting the mount 112 away from the cylinder 111 such that an air intake space is formed between the mount 112 and the cylinder 111. The cross-section of the mounting seat 112 is formed in a polygonal shape with at least one side being concave. Thus, an inwardly concave scoop-shaped air intake 1111 may be formed between the mounting seat 112 and the cylinder 111, and this shape arrangement may allow wind to enter the housing 110 in multiple directions. In the present embodiment, the mounting seat 112 is formed in a quadrilateral shape with concave edges. Specifically, the mounting beams 113 are arranged in plural (preferably in pairs, four in the present embodiment) along the circumferential direction of the mount 112 and the cylinder 111. One end of each mounting beam 113 is connected to the cylinder 111, and the other end is connected to four corners of the mounting base 112, and the end of the mounting beam 113 connected to the mounting base 112 is formed with a protruding portion extending inward along the radial direction of the mounting base, and is connected to the mounting base 112 through the protruding portion, so that the diameter of the circumscribed circle of the mounting base 112 is smaller than the outer diameter of the mounting base, and multi-directional air inlets 1111 (fig. 4) distributed along the circumferential direction are formed between the mounting base 112 and the cylinder 111 of the housing 110. The air inlet 1111 allows air entering the housing to be blown in a substantially linear direction toward the stator assembly 140 and in a substantially radial direction toward the rotor assembly 150 and the fan frame 120. Through the structure, a linear airflow channel can be formed, airflow can effectively flow through all parts to be cooled of the fan, the cooling effect on internal elements of the fan is further improved, and the performance and the service life of the fan are improved. In other embodiments, the mounting beam 113 may also extend out of the mounting seat 112 along the axial direction of the cylinder, and the extended portion may be used to support components of the circuit board, so that an air inlet space may be formed between the circuit board and the mounting seat 112 to cool the circuit board.

In one embodiment, the noise reduction coating is coated inside the fan shell, so that the noise of the fan can be effectively reduced.

Preferably, as shown in fig. 4, the edge of the mounting seat 112 forming the air inlet is of a circular arc structure, and the edge of the cylinder forming the top of the air inlet is also of a circular arc structure, so that the air flow can smoothly enter the fan 100, and the noise is reduced while cooling the device.

In fig. 4, in a preferred embodiment of the present invention, a mounting hole 1121 is centrally provided on the mounting base 112, and the second bearing base 123 of the fan frame 120 is engaged with the mounting hole 1121 when the fan 100 of the present application is assembled. Further, an alignment protrusion 1122 is provided on an inner side wall of the mounting hole 1121 of the housing 110, and the alignment protrusion 1122 is positioned on the inner side wall so as to be capable of engaging with an alignment groove formed on a circumference of a bearing seat of the fan frame 120, so that the housing 110 can be restricted from rotating about the rotation axis with respect to the fan frame 120. Enabling the air intake to align with the stator assembly inside the fan 100, further improving the cooling effect.

As shown in fig. 2 to 5, in one embodiment, in order to enhance the cooling effect more significantly, a plurality of protruding structures 114 are disposed on the inner wall of the cylinder 111 of the housing 110 along the circumferential direction, and the protruding structures 114 extend along the axial direction of the cylinder 111 (i.e., the plurality of protruding structures 114 are parallel to each other), preferably throughout the axial length. With this configuration, the convex structure 114 can increase the contact area of the wind with the cylinder 111, so that the air-cooled heat dissipation is more effectively performed, and the heat dissipation effect is improved. On the other hand, the axially extending raised structures 114 can act like reinforcing ribs, thereby increasing the strength of the housing 110.

Preferably, the plurality of convex structures 114 are uniformly distributed in the axial direction of the inner wall to prevent the wind from acting unstably with the inner wall of the cylinder 111 to cause the vibration of the fan. It is further preferred that the plurality of raised structures 114 have the same axial length, i.e. extend over all or part of the length of the cylinder 111, so that the interaction of the cylinder inner wall with the wind is more uniform along the axial direction.

Preferably, the surface of the protruding structure 114 is a smooth arc structure, and a smooth transition surface is also used before any two adjacent protruding structures 114, so that the resistance to wind blowing through the inner wall of the cylinder is minimized, thereby reducing the wind pressure loss. Further preferably, the surface of the convex structure 114 and the transition surface between the adjacent convex structures 114 are arc-shaped surfaces with the same curvature; most preferably, the surfaces of the raised structures 114 and the transition surfaces between adjacent raised structures 114 are circular arc surfaces of the same radius.

Optionally, the raised structure 114 is integrally formed with the barrel 111, such as by casting, injection molding. However, the protrusion structure 114 may be a separate component from the barrel 111, and the two components are connected by some connection means known to those skilled in the art, such as screw connection, rivet connection, welding connection, or adhesive connection.

In another embodiment, as shown in fig. 3 and 5, a sound-absorbing cavity 115 is further opened in at least a part (preferably all) of the plurality of protruding structures 114 to achieve the effect of eliminating noise. Specifically, the silencing cavity 115 extends along the axial direction of the fan from the end, close to the air outlet, of the protruding structure 114, and can buffer the vibration generated when the fan drives the impeller to rotate at a high speed, and the air in the cavity can absorb a part of noise, so that the noise of the fan is reduced.

Preferably, the axial length of the sound deadening chamber 115 is smaller than the axial length of the projection structure 114, in other words, as shown in fig. 2 and 3, the sound deadening chamber 115 has no opening at least on the side close to the air inlet side, so that the cooling air cannot enter the chamber, and no air passage is formed in the sound deadening chamber, thereby playing a role of sound insulation. For example, when the fan 100 is used in a small household appliance such as a vacuum cleaner, the axial length of the sound-damping chamber 115 is typically 1-2mm less than the axial length of the raised structure 114.

Further, the sound-deadening chamber 115 is a closed chamber opened in the protruding structure 114, and the air in the chamber can effectively absorb the noise inside the cylinder 111, which can more efficiently perform the function of eliminating the noise.

In one embodiment, the cavity of the sound-deadening chamber 115 may have various cross-sectional shapes, such as a circle, a semicircle, an ellipse, a rectangle, a square, a triangle, or the like. Preferably, the cavity is semi-circular (as in fig. 3) or circular in cross-sectional shape.

Additionally or alternatively, the sound-deadening chamber 115 may be filled with a quantity of sound-deadening material (e.g., sound-deadening cotton) that may be secured with an adhesive to more efficiently perform the vibration and noise reduction function.

It should be understood that the fan 100 provided herein may be adapted for use in various types of household appliances, such as the above-mentioned vacuum cleaner, or sweeping robot.

According to the fan and the household appliance, the contact area between the fan and the wind is increased by arranging the convex structures, and the air cooling effect of the fan is improved; meanwhile, the strength of the shell can be increased by the axially extending convex structure; the silencing cavity is arranged in the protruding structure, so that vibration generated when the fan drives the impeller to rotate at a high speed can be buffered, and the noise of the fan is further reduced; through setting up at least one air intake of a plurality of directions, can form sharp air current passageway, the air current can flow effectively and treat refrigerated part through all fans, has further improved the cooling effect to fan internal element, has promoted the performance and the life of fan.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (10)

1. The utility model provides a fan with heat dissipation design, its characterized in that includes the casing and is located stator module and rotor subassembly in the casing, wherein, be provided with a plurality of protruding structures along the circumferential direction on the barrel inner wall of casing, protruding structure extends along the axial of fan.

2. The fan of claim 1, wherein the raised structures have smooth arcuate surfaces, and wherein any two adjacent raised structures are rounded.

3. The fan of claim 1 or 2 wherein the plurality of raised structures are evenly distributed along the circumferential direction and extend throughout the axial length of the housing.

4. The fan of claim 1 or 2, wherein the projection structure comprises a sound-deadening chamber extending in an axial direction of the fan from an end of the projection structure near the air outlet.

5. The fan of claim 4 wherein the axial length of the muffling chamber is less than the axial length of the raised structure.

6. The fan of claim 5 wherein the sound attenuating cavity is filled with a sound attenuating material.

7. The blower of claim 6, wherein the sound-attenuating cavity is a closed cavity inside the raised structure.

8. The fan according to claim 1 or 2, wherein the end wall and the side wall of the housing together form at least one air inlet, and the opening of the air inlet is shaped like a scoop which is concave inwards, so that the wind enters the housing along multiple directions; the shell comprises a cylinder body, a mounting seat and a mounting beam, the mounting beam is connected with the cylinder body and the mounting seat, and the cross section of the mounting seat is formed into a polygonal shape with at least one side concave inwards, so that the at least one air inlet is formed between the mounting seat and the cylinder body;

the interior of the shell of the fan is coated with noise reduction paint.

9. Household appliance, characterized in that it comprises a fan according to any one of claims 1 to 8.

10. The household appliance according to claim 9, wherein the household appliance is a vacuum cleaner or a sweeping robot.

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