A fan with a heat dissipation design and a household appliance

Abstract

The present application provides a fan with a heat dissipation design and a household appliance. The fan includes a housing, and a stator assembly and a rotor assembly located within the housing. Among them, a plurality of convex structures are arranged along the circumferential direction on the inner wall of the cylindrical body of the housing, and the convex structures extend along the axial direction of the fan. By using this fan, a plurality of convex structures are arranged on the inner wall of the fan, increasing the contact area with the air and enhancing the air-cooling effect of the fan; at the same time, the axially extending convex structures can increase the strength of the housing.

Description

Technical Field

[0001] The present invention relates to the technical field of power components, and more specifically, to a fan and a household appliance with a heat dissipation design. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, vacuum cleaners, as a type of household cleaning appliance, have been used in more and more families. A vacuum cleaner is a device that uses a fan to drive the blades to rotate at high speed, generating a negative air pressure inside a sealed housing to suck up dust and garbage. When choosing a vacuum cleaner, consumers often tend to choose a vacuum cleaner with high power, high speed, and large suction. A high-power fan requires good cooling conditions, and the cooling effect of the fan will directly affect the efficiency, weight, and lifespan of the fan. Summary of the Invention

[0003] In view of the above problems in the prior art, the present application proposes a fan and a household appliance with a heat dissipation design, which improves the cooling effect of the fan by providing a raised structure on the inner wall of the fan to increase the contact area with the air.

[0004] In a first aspect, the present application provides a fan with a heat dissipation design, including a housing, a stator assembly, and a rotor assembly located inside the housing. Among them, a plurality of raised structures are arranged along the circumferential direction on the inner wall of the cylindrical body of the housing, and the raised structures extend along the axial direction of the fan. By using this fan, a plurality of raised structures are provided on the inner wall of the fan, increasing the contact area with the air and improving the air-cooling effect of the fan; at the same time, the axially extending raised structures can increase the strength of the housing.

[0005] In a possible implementation manner of the first aspect, the raised structure has a smooth arc surface, and a smooth transition is provided between any two adjacent raised structures. Through this implementation manner, the smooth structure surface and the transition surface are beneficial to reducing the wind resistance and minimizing the wind pressure loss.

[0006] In a possible implementation manner of the first aspect, the plurality of raised structures are evenly distributed along the circumferential direction, and the raised structures extend through the axial length of the housing.

[0007] In a possible implementation manner of the first aspect, the raised structure includes a sound-absorbing cavity, and the sound-absorbing cavity extends along the axial direction of the fan starting from one end of the raised structure close to the air outlet. Through this implementation manner, the sound-absorbing cavity can buffer the vibration generated when the fan drives the impeller to rotate at high speed, thereby reducing the noise of the fan.

[0008] In a possible implementation manner of the first aspect, the axial length of the sound-absorbing cavity is less than the axial length of the raised structure.

[0009] In a possible implementation of the first aspect, a sound-absorbing material is filled in the sound-absorbing cavity. Through this implementation, the sound-absorbing effect of the fan can be further improved.

[0010] In a possible implementation, the sound-absorbing cavity is a closed cavity inside the convex structure. Through this implementation, the air in the cavity can effectively absorb the noise inside the cylinder body, so that the noise can be eliminated more efficiently.

[0011] In a possible implementation of the first aspect, the end wall and the side wall of the housing jointly form at least one air inlet, and the opening shape of the air inlet is a spoon shape that is concave inward, so that the wind enters the housing along multiple directions; the housing includes a cylinder body, a mounting seat and a mounting beam, the mounting beam connects the cylinder body and the mounting seat, and the cross section of the mounting seat is formed into a polygon shape with at least one concave side, so that the at least one air inlet is formed between the mounting seat and the cylinder body; the inside of the fan housing is coated with a noise reduction coating.

[0012] In the second aspect, the present application also provides a household appliance, which includes a fan according to any one of the first aspect and its possible implementations.

[0013] In a possible implementation of the second aspect, the household appliance is a vacuum cleaner or a floor sweeping robot.

[0014] The fan and the household appliance with a heat dissipation design provided by the present application have the following beneficial effects compared with the prior art:

[0015] (1) By providing a convex structure to increase the contact area with the wind, the air-cooling effect of the fan is improved; at the same time, the axially extending convex structure can increase the strength of the housing;

[0016] (2) By providing a sound-absorbing cavity in the convex structure, the vibration generated when the fan drives the impeller to rotate at high speed can be buffered, thereby reducing the noise of the fan;

[0017] (3) By providing at least one air inlet in multiple directions, a straight air flow channel can be formed, and the air flow can effectively flow through all the components to be cooled of the fan, further improving the cooling effect on the internal components of the fan, and improving the performance and service life of the fan.

[0018] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved. Description of the Drawings

[0019] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the drawings, wherein:

[0020] Figure 1 Shows a schematic diagram of a blower according to an embodiment of the present invention;

[0021] Figure 2 and Figure 3 Shows a perspective view of the housing of the blower according to an embodiment of the present invention;

[0022] Figure 4 Shows a top view of the housing of the blower according to an embodiment of the present invention;

[0023] Figure 5 Shows a bottom view of the housing of the blower according to an embodiment of the present invention;

[0024] Figure 6 Shows a bottom view of the assembly of the housing of the blower, the stator assembly, and the rotor assembly according to an embodiment of the present invention.

[0025] In the drawings, like parts are designated by like reference numerals. The drawings are not drawn to actual scale.

[0026] List of reference numerals:

[0027] 100 - Blower; 110 - Housing; 120 - Blower skeleton; 130 - Guide impeller; 140 - Stator assembly; 150 - Rotor assembly; 111 - Cylinder; 112 - Mounting seat; 113 - Mounting beam; 114 - Protrusion structure; 115 - Sound - absorbing cavity; 1111 - Air inlet; 1121 - Mounting hole; 1122 - Alignment protrusion. Detailed implementation manners

[0028] The present invention will be further described below in conjunction with the drawings.

[0029] Figure 1 Is an external view schematic diagram of the blower 100 provided by the present invention. As Figure 1 shown, the blower 100 includes a housing 110, a blower skeleton 120, and a guide impeller 130, and the stator assembly 140 and the rotor assembly 150 are also shown in Figure 6 . In the assembled blower 100, the guide impeller 130 is connected to one side of the blower skeleton 120, the housing 110 is installed around the outside of the other side of the blower skeleton 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 Figure 6 shown.

[0030] As Figure 2 and Figure 3As shown, the housing 110 includes a cylinder 111, a mounting base 112, and a mounting beam 113. The mounting beam 113 connects the cylinder to the mounting base 112. In other words, the mounting beam 113 supports the mounting base 112 away from the cylinder 111, so that an intake space is formed between the mounting base 112 and the cylinder 111. The cross-section of the mounting base 112 is formed into a polygon shape with at least one concave side. Thus, a spoon-shaped air inlet 1111 that is recessed inward can be formed between the mounting base 112 and the cylinder 111. This shape arrangement allows air to enter the housing 110 in multiple directions. In this embodiment, the mounting base 112 is formed into a quadrilateral with all edges concave. Specifically, the mounting beams 113 are arranged in a plurality along the circumferential direction of the mounting base 112 and the cylinder 111 (preferably arranged in pairs as shown in the figure, and four are shown in this embodiment). One end of each mounting beam 113 is connected to the cylinder 111, and the other end is connected to the four corners of the mounting base 112. An extending portion that extends inward along the radial direction of the mounting cylinder is formed at the end of the mounting beam 113 where it is connected to the mounting base 112. The mounting base 112 is connected through the extending portion, so that the diameter of the circumcircle of the mounting base 112 is smaller than the outer diameter of the mounting cylinder, thereby forming a multi-directional air inlet 1111 distributed along the circumferential direction between the mounting base 112 and the cylinder 111 of the housing 110( Figure 4 ). The air inlet 1111 enables the air entering the housing to blow towards the stator assembly 140 in a substantially straight line direction and blow towards the rotor assembly 150 and the fan skeleton 120 in a substantially radial direction. Through the above structure, a straight air flow channel can be formed, and the air flow can effectively flow through all the components to be cooled of the fan, further improving the cooling effect on the internal components of the fan and enhancing the performance and service life of the fan. In other embodiments, the mounting beam 113 can also extend out of the mounting base 112 along the axial direction of the cylinder, and the extended portion can be used to support the components of the circuit board, so that an intake space can be formed between the circuit board and the mounting base 112 to cool the circuit board.

[0031] In one embodiment, the interior of the fan housing is coated with a noise reduction coating, which can effectively reduce the fan noise.

[0032] Preferably, as Figure 4 shown, the edge of the mounting base 112 that constitutes the air inlet is an arc structure, and the top edge of the cylinder that constitutes the air inlet is also an arc structure, so that the air flow can smoothly enter the fan 100, reducing the noise while cooling the device.

[0033] In Figure 4Among them, in a preferred embodiment of the present invention, a mounting hole 1121 is centrally provided on the mounting seat 112. When assembling the fan 100 of the present application, the second bearing seat 123 of the fan frame 120 engages with the mounting hole 1121. Further, an alignment protrusion 1122 is provided on the inner sidewall of the mounting hole 1121 of the housing 110. The alignment protrusion 1122 is positioned on the inner sidewall to be able to engage with an alignment groove opened on the circumference of the bearing seat of the fan frame 120, so as to be able to limit the housing 110 from rotating around the rotation axis relative to the fan frame 120. This enables the air inlet to be aligned with the stator assembly inside the fan 100, thereby further improving the cooling effect.

[0034] As Figures 2 to 5 shown, in one embodiment, in order to more significantly improve the cooling effect, a plurality of protruding structures 114 are provided along the circumferential direction on the inner wall of the cylinder 111 of the housing 110. 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), and preferably extend throughout the axial length. With this configuration, the protruding structures 114 can increase the contact area between the wind and the cylinder 111, enabling more effective air-cooled heat dissipation and improving the heat dissipation effect. On the other hand, the axially extending protruding structures 114 can act like reinforcing ribs, thereby enhancing the strength of the housing 110.

[0035] Preferably, in the axial direction of the inner wall, the plurality of protruding structures 114 are evenly distributed to prevent the fan from vibrating due to unstable acting force between the wind and the inner wall of the cylinder 111. Further preferably, the plurality of protruding structures 114 have the same axial length, that is, they extend over all or part of the length of the cylinder 111, making the interaction between the inner wall of the cylinder and the wind more uniform along the axial direction.

[0036] Preferably, the surface of the protruding structure 114 is a smooth arc structure, and a smooth transition surface is also adopted between any two adjacent protruding structures 114. In this way, the resistance when the wind blows through the inner wall of the cylinder can be minimized, thereby reducing the wind pressure loss. Further preferably, the surface of the protruding structure 114 and the transition surface between adjacent protruding structures 114 are arc surfaces with the same curvature; most preferably, the surface of the protruding structure 114 and the transition surface between adjacent protruding structures 114 are arc surfaces with the same radius.

[0037] Optionally, the protruding structure 114 is integrally formed with the cylinder 111, such as by casting or injection molding. However, the protruding structure 114 can also be a separate component from the cylinder 111, and the two are joined by some connection means known to those skilled in the art, such as screw connection, rivet connection, welding connection, or adhesive connection.

[0038] In another embodiment, asFigure 3 and Figure 5 As shown, in at least a part (preferably all) of the plurality of protruding structures 114, a sound-absorbing cavity 115 is further provided to achieve the effect of eliminating noise. Specifically, the sound-absorbing cavity 115 extends along the axial direction of the fan from one end of the protruding structure 114 close to the air outlet. It 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 the noise, thereby reducing the noise of the fan.

[0039] Preferably, the axial length of the sound-absorbing cavity 115 is less than the axial length of the protruding structure 114. In other words, as Figure 2 and Figure 3 shown, the sound-absorbing cavity 115 has no opening at least near the air inlet side, so that the cooling air cannot enter the cavity, and no air duct is formed in the sound-absorbing cavity, playing a sound-insulating role. For example, when the fan 100 is applicable to small household appliances such as a vacuum cleaner, the axial length of the sound-absorbing cavity 115 is generally 1-2 mm smaller than the axial length of the protruding structure 114.

[0040] Furthermore, the sound-absorbing cavity 115 is a closed cavity opened in the protruding structure 114, and the air in the cavity can effectively absorb the noise inside the cylinder body 111, so that the noise elimination effect can be more efficiently achieved.

[0041] In one embodiment, the cavity of the sound-absorbing cavity 115 can have various cross-sectional shapes, such as circular, semi-circular, elliptical, rectangular, square or triangular, etc. Preferably, the cross-sectional shape of the cavity is semi-circular (as Figure 3 ) or circular.

[0042] Additionally or alternatively, a certain amount of sound-absorbing material (such as sound-absorbing cotton) can be filled in the sound-absorbing cavity 115, and the sound-absorbing material can be fixed using an adhesive to more efficiently achieve the effects of vibration reduction and noise reduction.

[0043] It should be understood that the fan 100 provided in the present application can be applicable to various types of household appliances, such as the vacuum cleaner mentioned above, or a floor sweeping robot.

[0044] The fan and the household appliance provided in the present application increase the contact area with the wind by setting the protruding structure, improving the air-cooling effect of the fan; at the same time, the axially extending protruding structure can increase the strength of the housing; a sound-absorbing cavity is provided in the protruding structure, which can buffer the vibration generated when the fan drives the impeller to rotate at a high speed, thereby reducing the noise of the fan; by setting at least one air inlet in multiple directions, a straight air flow channel can be formed, and the air flow can effectively flow through all the components to be cooled of the fan, further improving the cooling effect on the internal components of the fan and enhancing the performance and service life of the fan.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0046] Although the present invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed, as long as they do not depart from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein can be combined in a manner different from that described in the original claims. It should also be understood that the features described in connection with a single embodiment can be used in other described embodiments.

Claims

1. A blower with a heat dissipation design, Characterized in that, It includes a housing and a stator assembly and a rotor assembly located inside the housing. Among them, a plurality of convex structures are arranged along the circumferential direction on the inner wall of the cylinder of the housing, and the convex structures extend along the axial direction of the blower; The convex structure has a smooth arc surface, and any two adjacent convex structures are smoothly transitioned. The convex structure includes a sound-absorbing cavity, and the sound-absorbing cavity extends along the axial direction of the blower starting from one end of the convex structure close to the air outlet. The axial length of the sound-absorbing cavity is less than the axial length of the convex structure. Sound-absorbing material is filled in the sound-absorbing cavity, and the sound-absorbing cavity has no opening at least near the air inlet side. The plurality of convex structures are evenly distributed along the circumferential direction, and the convex structure extends through the axial length of the housing.

2. The blower according to claim 1, Characterized in that, The sound-absorbing cavity is a closed cavity inside the convex structure.

3. The blower according to claim 1, Characterized in that, The end wall and the side wall of the housing jointly form at least one air inlet, and the opening shape of the air inlet is a spoon shape recessed inward, so that the air enters the housing along multiple directions; the housing includes a cylinder, a mounting seat and a mounting beam, and the mounting beam connects the cylinder and the mounting seat. The cross section of the mounting seat is formed into a polygon shape with at least one side recessed, so that the at least one air inlet is formed between the mounting seat and the cylinder; The inner part of the housing of the blower is coated with a noise reduction coating.

4. A household appliance, Characterized in that, It includes the blower according to any one of claims 1 to 3.

5. The household appliance according to claim 4, Characterized in that, The household appliance is a vacuum cleaner or a floor sweeping robot.

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