CN114673675B

CN114673675B - Fan assembly and dust collector

Info

Publication number: CN114673675B
Application number: CN202011559399.9A
Authority: CN
Inventors: 秦杰; 胡小文; 胡斯特; 张龙新; 曾振杰
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2023-05-09
Anticipated expiration: 2040-12-25
Also published as: WO2022134963A1; CN114673675A

Abstract

The invention provides a fan assembly and a dust collector, wherein the fan assembly comprises: a rotating shaft; the driving part is arranged on the rotating shaft; the first impeller is arranged on the rotating shaft and is positioned at one side of the driving part; the diffuser is arranged on the other side of the driving part; and a second impeller disposed on the rotating shaft between the driving member and the diffuser, the second impeller being configured to supply air from the first impeller to the diffuser. According to the fan assembly provided by the invention, the first impeller and the second impeller are arranged on two sides of the driving part, so that the stability of the driving part in the process of driving the rotating shaft to rotate is greatly improved, the running stability of the driving part is ensured, and the fan assembly has the advantages of high air supply efficiency and small radial size.

Description

Fan assembly and dust collector

Technical Field

The invention relates to the field of household appliances, in particular to a fan assembly and a dust collector.

Background

With the improvement of life quality of people, the dust collector is gradually favored by consumers due to the advantages of small volume, light weight, convenient use and the like. In order to improve the use quality of the dust collector, namely, noise is reduced while the suction force of the dust collector is improved. At present, all manufacturers turn the eyes to a multi-stage fan technology, and the multi-stage fan has long axial dimension, poor rotor stability, complex structure and high processing and manufacturing cost.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

To this end, a first aspect of the present invention provides a fan assembly.

In a second aspect, the invention provides a vacuum cleaner.

The first aspect of the present invention provides a fan assembly comprising: a rotating shaft; the driving part is arranged on the rotating shaft; the first impeller is arranged on the rotating shaft and is positioned at one side of the driving part; the diffuser is arranged on the other side of the driving part; and a second impeller disposed on the rotating shaft between the driving member and the diffuser, the second impeller being configured to supply air from the first impeller to the diffuser.

The fan assembly comprises a rotating shaft, a driving part, a first impeller, a diffuser and a second impeller. The first impeller, the second impeller and the diffuser can be matched for use, so that air flow is driven to be sucked into the shell from the air inlet under the action of the first impeller, and is discharged out of the shell from the air outlet under the action of the diffuser. And the driving part is positioned between the first impeller and the second impeller, thereby playing a role in balancing the load.

In the operation process of the fan assembly, the driving part drives the rotating shaft to rotate, and then drives the first impeller and the second impeller to rotate. The first impeller rotates at the air inlet, so that external air flow is sucked, and the driving air flows to the second impeller; after flowing to the second impeller, the air flow is further driven by the second impeller to flow to the diffuser and is discharged from the air outlet. Particularly, as the first impeller and the second impeller are arranged on the two sides of the driving part, the gravity center of the rotating shaft in the running process is ensured to be closer to the driving part, or the gravity center is directly positioned at the position of the driving part, so that the suspension force and the radial moment at the two ends of the rotating shaft are reduced, the radial load generated by the first impeller and the radial load generated by the second impeller are offset, the stability of the driving part in the rotating process of driving the rotating shaft is greatly improved, and the running stability of the driving part is ensured.

And because the inside gas of casing flows from first impeller to second impeller, consequently the inside gas of casing can flow through driving part, can carry out the heat exchange with driving part, and then make the gas flow take away driving part's heat, realized the cooling effect to driving part, can effectively reduce driving part's operating temperature, and then guarantee driving part's life.

In addition, through the cooperation of first impeller and second impeller, can effectively reduce the operational noise of fan subassembly when guaranteeing fan subassembly air feed ability to through the design of diffuser, can reduce the radial size of fan subassembly by a wide margin, under the circumstances that guarantees that fan subassembly can realize the air supply of second grade impeller, guaranteed that the radial size of fan subassembly can not increase, can make the radial size that the fan subassembly that the invention put forward the fan subassembly and the fan subassembly of single impeller in the correlation technique imitate, and guaranteed that the flow efficiency of air current is promoted.

According to the fan assembly provided by the invention, the driving part is arranged between the first impeller and the second impeller, so that the radial load generated by the first impeller and the radial load generated by the second impeller are mutually offset, the stability of the driving part in the process of driving the rotating shaft to rotate is greatly improved, the running stability of the driving part is ensured, and the fan assembly has the advantages of high air supply efficiency and small radial size.

A second aspect of the present invention provides a vacuum cleaner, comprising: the fan assembly of the first aspect described above.

The dust collector provided by the invention comprises the fan assembly in the first aspect. Therefore, all the advantages of the fan assembly described above are not discussed herein.

Particularly, the dust collector provided by the invention can be a handheld dust collector, has the characteristics of miniaturization and is convenient for users to use.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a fan assembly according to one embodiment of the present invention;

FIG. 2 is a cross-sectional view of the blower assembly of the embodiment shown in FIG. 1;

FIG. 3 is a schematic illustration of a portion of the structure of the blower assembly of the embodiment of FIG. 1;

FIG. 4 is a schematic view of the mounting block of the fan assembly of the embodiment of FIG. 1;

FIG. 5 is a front view of the mount of the embodiment of FIG. 4;

FIG. 6 is a partial schematic view of the cross-sectional view of the embodiment shown in FIG. 5;

FIG. 7 is a partial schematic view of a cross-sectional view of the embodiment shown in FIG. 5;

FIG. 8 is a partial schematic view of a cross-sectional view of the embodiment shown in FIG. 5;

FIG. 9 is a schematic illustration of the return structure of the fan assembly of the embodiment of FIG. 1.

The correspondence between the reference numerals and the component names in fig. 1 to 9 is:

100 shells, 102 first installation sections, 104 second installation sections, 106 transition sections, 108 fins, 110 air inlets, 112 air outlets, 200 driving components, 202 magnetic components, 204 windings, 300 first impellers, 302 first rotating discs, 304 first blades, 306 first wind scoopers, 400 diffusers, 402 diffuser blades, 500 second impellers, 502 second rotating discs, 504 second blades, 506 second wind scoopers, 600 guide wind channels, 602 diffuser wind channels, 604 return wind channels, 700 return structures, 702 return discs, 704 guide blades, 706 accommodating grooves, 708 arcs, 800 installation seats, 802 seats, 804 supports, 806 rotating shafts and 808 bearings.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

A blower assembly and a cleaner provided according to some embodiments of the present invention are described below with reference to fig. 1 to 9. Wherein the arrows in fig. 2 indicate the gas flow direction.

As shown in fig. 1, 2 and 3, an embodiment of a first aspect of the present invention proposes a fan assembly, including: a spindle 806; a driving part 200 disposed on the rotation shaft 806; the first impeller 300 is disposed on the rotation shaft 806 and located at one side of the driving part 200; a diffuser 400 disposed at the other side of the driving part 200; the second impeller 500 is disposed on the rotation shaft 806 between the driving part 200 and the diffuser 400, and the second impeller 500 is configured to supply air from the first impeller 300 to the diffuser 400.

The fan assembly according to the present embodiment includes a rotation shaft 806, a driving part 200, a first impeller 300, a diffuser 400, and a second impeller 500. The rotation shaft 806 is sequentially provided with the first impeller 300, the driving component 200 and the second impeller 500, and the first impeller 300, the second impeller 500 and the diffuser 400 can be matched for use, so that the airflow is driven to be sucked into the housing 100 from the air inlet 110 under the action of the first impeller 300, and is discharged out of the housing 100 from the air outlet 112 under the action of the diffuser 400. The driving member 200 is located between the first impeller 300 and the second impeller 500, and thus functions to balance the load.

As shown in fig. 2, during operation of the fan assembly, the driving member 200 drives the rotation shaft 806 to rotate, thereby driving the first impeller 300 and the second impeller 500 to rotate. The first impeller 300 rotates at the air inlet 110, thereby sucking in the external air flow, and driving the air flow to flow toward the second impeller 500; after flowing to the second impeller 500, the airflow further flows to the diffuser 400 by the driving of the second impeller 500, and is discharged from the air outlet 112.

In particular, as shown in fig. 3, since the first impeller 300 and the second impeller 500 are disposed on two sides of the driving member 200, it is ensured that the center of gravity of the rotation shaft 806 is closer to the driving member 200 during operation, or is directly located at the position of the driving member 200, so that the suspension force and the radial moment at two ends of the rotation shaft 806 are reduced, and further the radial load generated by the first impeller 300 and the radial load generated by the second impeller 500 are offset, so that the stability of the driving member 200 during driving the rotation shaft 806 is greatly improved, and the operation stability of the driving member 200 is also ensured.

In addition, since the gas in the casing 100 flows from the first impeller 300 to the second impeller 500, the gas in the casing 100 flows through the driving component 200, and can exchange heat with the driving component 200, so that the gas flow carries away the heat of the driving component 200, the cooling effect of the driving component 200 is achieved, the operation temperature of the driving component 200 can be effectively reduced, and the service life of the driving component 200 is further ensured.

In addition, through the cooperation of first impeller 300 and second impeller 500, when guaranteeing the fan subassembly and send the wind ability, can effectively reduce the operational noise of fan subassembly to through the design of diffuser 400, can reduce the radial dimension of fan subassembly by a wide margin, under the circumstances that guarantees that the fan subassembly can realize the second grade impeller air supply, guaranteed that the radial dimension of fan subassembly can not increase, can make this embodiment propose the fan subassembly and the radial dimension of the fan subassembly of single impeller in the correlation technique imitate, and guaranteed that the flow efficiency of air current is promoted.

According to the fan assembly provided by the invention, the driving part 200 is arranged between the first impeller 300 and the second impeller 500, so that the radial load generated by the first impeller 300 and the radial load generated by the second impeller 500 are mutually offset, the stability of the driving part 200 in the process of driving the rotating shaft 806 to rotate is greatly improved, the running stability of the driving part 200 is ensured, and the fan assembly has the advantages of high air supply efficiency and small radial size.

In addition, the second impeller 500 drives the gas to the diffuser 400 such that the gas flow is blown out from the gas outlet 112 after being diffused by the diffuser 400. In particular, due to the design of the diffuser 400, the radial dimensions of the first impeller 300 and the second impeller 500 can be greatly reduced under the condition of ensuring the air delivery capacity of the fan assembly, thereby reducing the radial dimensions of the fan assembly, and realizing the structural miniaturization and compact design of the fan assembly. In a specific embodiment, as shown in fig. 7 and 8, both the first impeller 300 and the second impeller 500 are centrifugal impellers.

The fan assembly provided by the invention can effectively reduce the working noise of the fan assembly while ensuring the air supply capacity of the fan assembly through the matching of the first impeller 300 and the second impeller 500, and can greatly reduce the radial size of the fan assembly through the design of the diffuser 400, so that the radial size of the fan assembly is ensured not to be increased under the condition that the fan assembly can realize the air supply of the second-stage impeller, the radial size of the fan assembly is ensured to be similar to that of the fan assembly of a single impeller in the related art, and the flow efficiency of gas is ensured to be improved.

In one embodiment of the present invention, as shown in fig. 1 and 2, the fan assembly further includes: the casing 100, the casing 100 includes an air inlet 110 and an air outlet 112 that are in communication, a rotation shaft 806 extends from the air inlet 110 toward the air outlet 112, the first impeller 300 is located at the air inlet 110, and the diffuser 400 is located at the air outlet 112.

In this embodiment, the housing 100 includes an air inlet 110 and an air outlet 112 that are in communication, and the shaft 806 is located inside the housing 100 and extends from the air inlet 110 to the air outlet 112. Wherein the first impeller 300 is disposed at an inlet of the housing 100, and the diffuser 400 is disposed at an outlet 112 of the housing 100, thereby driving the air flow from the air inlet 110 into the interior of the housing 100 and out of the outlet 112.

As shown in fig. 2, during operation of the fan assembly, the driving part 200 drives the rotation shaft 806 to rotate the first impeller 300 and the second impeller 500. The first impeller 300 rotates at the air inlet 110, thereby sucking the external air flow from the air inlet 110 into the inside of the casing 100; then, the part of the air flow passes through the driving part 200 under the combined action of the first impeller 300 and the second impeller 500, and can radiate heat from the driving part 200; then, the gas flowing to the second impeller 500 flows to the diffuser 400 by the driving of the second impeller 500, and is discharged from the gas outlet 112 by the diffusion of the diffuser 400.

In one embodiment of the present invention, as shown in fig. 2 and 3, the fan assembly further includes: the mounting seat 800, the mounting seat 800 includes a seat body 802 and a bracket 804, the seat body 802 is located in the shell 100, the bracket 804 is connected to the inner walls of the seat body 802 and the shell 100; a bearing 808 disposed in the mounting base 800, the rotation shaft 806 passing through the bearing 808; as shown in fig. 4 and 5, the thickness of the bracket 804 increases gradually and then decreases gradually along the airflow direction.

In this embodiment, the fan assembly further includes a mount 800 and a bearing 808. The mounting base 800 includes a base 802 and a bracket 804, wherein a bearing 808 is disposed in the base 802 and is used for supporting a rotating shaft 806, and the first impeller 300, the second impeller 500 and the diffuser 400 disposed on the rotating shaft 806, and the bracket 804 connects the base 802 to an inner wall of the housing 100. During operation of the fan assembly, the rotation shaft 806 can be enabled to drive the first impeller 300, the second impeller 500 and the diffuser 400 to rotate smoothly.

In the embodiment, the mounting seat 800 and the bearing 808 are respectively disposed at two sides of the driving part 200, so as to support the rotation shaft 806 from two positions.

In addition, the thickness of the bracket 804 gradually increases from one end to the middle and gradually decreases from the middle to the other end in the air flow direction, so that the thickness of the bracket 804 smoothly excessively decreases from the middle to both ends. So designed, the walls on both sides of the bracket 804 are smooth without steps or sharp points, and the smooth walls do not cause air flow loss during the air flow through the direct process. In addition, based on the above arrangement, stress concentration of the bracket 804 is reduced, and supporting strength of the bracket 804 is ensured.

Specifically, the support 804 is protruded from the base 802, and the support 804 is cut in a plane perpendicular to the protruding direction of the support 804, and the support 804 may be streamline, fusiform, or spindle-shaped.

In one embodiment of the present invention, as shown in fig. 2, the driving part 200 includes: a magnetic member 202 disposed on the rotation shaft 806; the winding 204 is sleeved on the magnetic member 202 and is spaced from the magnetic member 202, and the winding 204 is configured to drive the magnetic member 202 to rotate the rotating shaft 806.

In this embodiment, the drive member 200 includes a magnetic element 202 and a winding 204. The magnetic member 202 is fixedly disposed on the rotating shaft 806, the winding 204 is sleeved on the outer wall of the magnetic member 202, and the winding 204 and the magnetic member 202 are disposed at intervals. So designed, in the operation process of the fan assembly, when the winding 204 is powered on, a magnetic field is generated to drive the magnetic member 202 to rotate, so that the magnetic member 202 drives the rotating shaft 806 to rotate, and the rotating shaft 806 drives the first impeller 300 and the second impeller 500 to rotate, thereby ensuring the driving of the gas.

In particular, the present invention directly drives the magnetic member 202 by using the winding 204 to drive the rotation shaft 806, which can effectively simplify the structure of the driving component 200 and reduce the energy loss in the power transmission structure, thereby improving the working efficiency of the driving component 200.

In a specific embodiment, the magnetic member 202 is magnetic steel, and the magnetic steel is sleeved on the rotating shaft 806, and the magnetic steel is fixedly connected with the rotating shaft 806.

In one embodiment of the present invention, as shown in fig. 2, the fan assembly further includes: the two ends of the diversion air channel 600 are respectively communicated with the air outlet end of the first impeller 300 and the air inlet end of the second impeller 500; wherein, along the airflow flowing direction, at least part of the caliber of the diversion air duct 600 gradually increases.

In this embodiment, the fan assembly also includes a diversion tunnel 600. The air guiding duct 600 is disposed inside the casing 100, an inlet of the air guiding duct 600 is communicated with an air outlet end of the first impeller 300, an outlet of the air guiding duct 600 is communicated with an air inlet end of the second impeller 500, and then an air guiding effect is achieved between the first impeller 300 and the second impeller 500, so that air flow loss is reduced.

In addition, the aperture of at least part of the diversion tunnel 600 gradually increases along the airflow flowing direction. That is, during operation of the fan assembly, the air flow entering the inside of the air guiding structure may pass through a section of air guiding duct 600 with a gradually increasing caliber. When the airflow passes through the partial flow guide air duct 600 with gradually increased caliber, the effect of reducing speed and boosting pressure can be realized, the noise of the airflow when the airflow circulates in the partial flow guide air duct 600 can be reduced, and the airflow pressure can be ensured.

In one embodiment of the present invention, as shown in fig. 6 and 7, the guide duct 600 includes: the diffusion air duct 602 is communicated with the air outlet end of the first impeller 300; a return air duct 604 in communication with the diffuser air duct 602 and the inlet end of the second impeller 500; wherein, the aperture of the diffusion air duct 602 gradually increases along the airflow flowing direction.

In this embodiment, the baffle stack 600 includes a diffuser stack 602 and a return stack 604 in communication. Wherein the diffusion air duct 602 is in communication with the outlet end of the first impeller 300, and the return air duct 604 is in communication with the diffusion air duct 602 and the inlet end of the second impeller 500. So designed, during operation of the fan assembly, the air flow is driven by the first impeller 300 to first enter the diffusion duct 602 of the diversion duct 600, then passes through the return duct 604 of the diversion duct 600, and flows toward the second impeller 500.

In particular, the aperture of the diffuser duct 602 increases gradually in the direction of airflow. That is, as the airflow flows within the diffusion duct 602, the flow velocity of the airflow decreases, and the air pressure within the diffusion duct 602 increases. By the design, under the condition of ensuring the same air supply quantity, the radial size of the first impeller 300 can be effectively reduced, and further the structural compactness and miniaturization of the fan assembly are realized.

In one embodiment of the present invention, as shown in fig. 7, the first impeller 300 is a centrifugal impeller; the diffusion air duct 602 includes at least one bend, the diffusion air duct 602 is located at two sides of the first impeller 300, and the return air duct 604 is located between the first impeller 300 and the second impeller 500.

In this embodiment, the first impeller 300 is a centrifugal impeller and the diffusion duct 602 includes at least one bend. In this way, the first impeller 300 is disposed with its axial direction facing the air inlet 110, and the radial direction of the first impeller 300 is used as the air outlet end. And, the bending of the diffusion air duct 602 is located at the peripheral side of the first impeller 300, so that the diffusion air duct 602 is located at two sides of the first impeller 300 and is communicated with the air inlets 110 at two sides of the first impeller 300 and the second impeller 500.

In particular, the aperture of the diffusion duct 602 in the airflow direction is gradually increased, and the diffusion duct 602 itself is provided in a bent manner. By the design, the diffusion air duct 602 integrates diffusion and bend action, so that the air flow in the diffusion air duct 602 can realize speed reduction and pressurization while turning, and the radial size of the first impeller 300 is reduced.

In one embodiment of the present invention, as shown in fig. 1, 2 and 9, the fan assembly further includes: the return flow structure 700 is disposed between the first impeller 300 and the second impeller 500.

In this embodiment, the fan assembly also includes a return structure 700. Wherein the return structure 700 is disposed within the housing 100 and between the first impeller 300 and the second impeller 500. The return structure 700 is used in conjunction with the first impeller 300 such that the air flow from the first impeller 300 to the return structure 700. Specifically, the backflow structure 700 is sleeved on the rotating shaft 806, and plays a role in backflow of the air flow radially blown out from the first impeller 300, so as to change the flow direction of the air flow radially blown out from the first impeller 300, so that the part of the air flow flows to the second impeller 500.

Specifically, when the first impeller 300 is a centrifugal impeller, the first impeller 300 faces the radial air outlet, and the second impeller 500 is located in the axial direction of the first impeller 300. Therefore, the present invention is used together with the first impeller 300 through the backflow structure 700, so that the backflow structure 700 has good diversion and backflow effects, and the air flow flows from the first impeller 300 to the second impeller 500.

In one embodiment of the present invention, as shown in fig. 9, the reflow structure 700 includes: the backflow disc 702 is arranged in the shell 100, and the diversion air duct 600 is formed between the backflow disc 702 and the inner wall of the shell 100; the guide vanes 704 are disposed on the return tray 702 and at least partially within the return air duct 604.

In this embodiment, the reflow structure 700 includes a reflow tray 702 and guide vanes 704. The radial end surface of the backflow disc 702 is configured into an arc 708, so that the backflow disc 702 and the interior of the casing 100 jointly define the diversion air duct 600, and the diversion air duct 600 is guaranteed to be communicated with the air outlet end of the first impeller 300, so that the air flow driven by the first impeller 300 flows to the backflow structure 700. In addition, the guide vanes 704 are at least partially disposed within the return air duct 604. As designed, during operation of the fan assembly, the air flow enters the guide air duct 600 under the driving of the first impeller 300 and flows to the second impeller 500 under the guide action of the guide blades 704, so that the backflow structure 700 has good rectification and racemization effects.

In a specific embodiment, during the operation of the fan, since the first impeller 300 is axially air-in and radially air-out, the airflow blown out from the first impeller 300 flows toward the inner sidewall of the housing 100, and by virtue of the design of the backflow structure 700, particularly by the cooperation of the guide channel and the guide vane 704, the flow direction of the airflow blown out from the first impeller 300 is changed, so that the part of the airflow flows toward the second impeller 500. Moreover, a gap exists between the reflux disc 702 and the rotating shaft 806, the reflux disc can not rotate along with the rotating shaft 806 in the operation process of the fan assembly, and the air flow blown out from the first impeller 300 has a certain rotation direction, and through the design of the guide blades 704, the air flow flows in the gap between two adjacent guide blades 704, so that the racemization function is further achieved, the air flow is ensured to be stably blown to the second impeller 500, the phenomenon that the air flow is in vortex flow direction to the second impeller 500 is avoided, and further the unnecessary noise generated in the fan assembly is avoided.

In a specific embodiment, as shown in fig. 7, the first impeller 300 is a centrifugal impeller, and the first impeller 300 includes a first rotor plate 302, first blades 304, and a first wind scooper 306. The first turntable 302 is disposed on the rotation shaft 806, and can drive the first blade 304 to rotate under the driving of the rotation shaft 806; the first wind scooper 306 and the first rotating disc 302 are located on two sides of the first blade 304, and can play a role in guiding flow during operation, so as to reduce the loss of air flow under the action of the first impeller 300. That is, during operation of the first impeller 300, gas enters the interior of the first impeller 300 from the axial direction under the driving of the first blades 304, and is blown out from the radial direction under the flow guide of the first wind scooper 306 and the first rotor plate 302.

Further, as shown in fig. 7, the distance between the outer edge of the first wind scooper 306 and the axis of the first impeller 300 is greater than the distance between the outer edge of the first turntable 302 and the axis of the first impeller 300. That is, at the location of the radial outlet end of the first impeller 300, the first cowl 306 is longer in size than the first rotor plate 302. By such design, the air flow can be controlled to be blown out from the first impeller 300 more uniformly and smoothly, and the air flow blown out from the first impeller 300 is ensured to have an included angle compared with the rotating shaft 806, so that the air flow blown out from the first impeller 300 is ensured to smoothly enter the diversion air duct 600, and the flow loss and noise reduction of the air flow during turning in the diversion air duct 600 are ensured to be minimum. Based on the design, on one hand, the air supply capability of the fan assembly is ensured, and on the other hand, the noise and loss of air flow in the diversion air duct 600 are reduced.

In a specific embodiment, as shown in fig. 8, the second impeller 500 is a centrifugal impeller, and the second impeller 500 includes a second turntable 502, second blades 504, and a second wind scooper 506. The second turntable 502 is disposed on the rotation shaft 806, and can drive the second blade 504 to rotate under the driving of the rotation shaft 806; the second wind scooper 506 and the second turntable 502 are located at two sides of the second vane 504, and may play a role in guiding flow during operation, thereby reducing the loss of air flow under the action of the second impeller 500. That is, during operation of the second impeller 500, gas enters the inside of the second impeller 500 from the axial direction by the driving of the second blades 504, and is blown out from the radial direction by the flow guide of the second air guide housing 506 and the second turntable 502.

Further, as shown in fig. 8, the distance between the outer edge of the second wind scooper 506 and the axis of the second impeller 500 is greater than the distance between the outer edge of the second turntable 502 and the axis of the second impeller 500. That is, at the position of the radial outlet end of the second impeller 500, the second wind scooper 506 is longer in size than the second turntable 502. By such design, the air flow can be controlled to blow out from the second impeller 500 more uniformly and smoothly, and the air flow blown out from the second impeller 500 is ensured to have an included angle compared with the rotation shaft 806, so that the air flow blown out from the second impeller 500 is ensured to smoothly enter the diffuser 400, and the flow loss is reduced to the minimum during turning. On the one hand, the air supply capability of the fan assembly is ensured, and on the other hand, the noise of the air flow in the diversion air duct 600 is reduced.

In a specific embodiment, as shown in fig. 7, an end surface of the backflow pan 702 facing the air inlet 110 is provided with a receiving groove 706, and the first rotating pan 302 of the first impeller 300 is at least partially received in the receiving groove 706, so as to ensure that the first rotating pan 302 is flush with a portion of the backflow pan 702 where the receiving groove 706 is not provided, and thus the first air guiding cover 306 of the first impeller 300 is flush with the interior of the housing 100. By the design, the radial air outlet end of the first impeller 300 is aligned with the guide air channel 600, the first rotating disc 302 and the first air guide cover 306 are tangential to the inner wall of the guide air channel 600, and resistance is not received when air flows enter the guide air channel 600 from the first impeller 300.

In one embodiment of the invention, as shown in FIG. 2, the diffuser 400 is an axial flow diffuser; the diffuser 400 includes at least one set of diffuser blades 402, with any set of diffuser blades 402 being annularly distributed.

In this embodiment, the diffuser 400 is provided as an axial flow diffuser. The diffuser 400 includes at least one set of diffuser blades 402, where any set of diffuser blades is annularly distributed at the air outlet. By the design, the axial flow diffuser ensures that the radial sizes of the first impeller 300 and the second impeller 500 are greatly reduced on one hand, and the air supply efficiency of the fan assembly is ensured on the other hand. And axial flow diffusers can be used instead of radial diffusers, thereby reducing the radial dimensions of the fan assembly.

In one embodiment of the present invention, as shown in FIG. 2, the diffuser 400 includes at least a plurality of sets of diffuser blades 402; the number of the diffusion blades 402 of each group gradually increases along the airflow flowing direction; and/or the swirl angle of each set of diffuser blades 402 decreases gradually along the direction of airflow.

In this embodiment, the diffuser 400 includes at least a plurality of groups of diffuser blades 402, and the plurality of groups of diffuser blades 402 are spaced apart in the direction of airflow.

Further, the number of diffuser blades 402 per set increases gradually in the direction of airflow, and the swirl angle of the diffuser blades 402 per set decreases gradually. By adopting the design, the diffusion blades 402 of the diffuser 400 are mutually matched, the diffusion effect on the airflow is ensured, and meanwhile, the axial flow diffuser comprising a plurality of groups of diffusion blades 402 can be used for replacing the radial diffuser, so that the radial size of the fan assembly is reduced.

In one embodiment of the invention, as shown in FIG. 2, the diffuser vane 402 is a three-way vane.

In this embodiment, the diffuser blades 402 are ternary blades. In particular, a plurality of three-way blades may be used in combination with a radial diffuser, thereby reducing the radial size of the fan assembly.

In one embodiment of the present invention, as shown in fig. 1 and 2, the housing 100 includes: a first mounting section 102, the first impeller 300 being located within the first mounting section 102; a second mounting section 104, the second impeller 500 and the diffuser 400 being located within the second mounting section 104; a transition section 106 is provided in connection with the first mounting section 102 and the second mounting section 104.

In this embodiment, the housing 100 includes a first mounting section 102, a second mounting section 104, and a transition section 106 that are connected. Wherein the air inlet 110 is disposed at an axial end face of the first mounting section 102 and the first impeller 300 is disposed within the first mounting section 102; the air outlet 112 is arranged on the axial end surface of the second mounting section 104, and the second impeller 500 is arranged in the second mounting section 104; the transition section 106 is disposed between the first mounting section 102 and the second mounting section 104 and is connected to both the first mounting section 102 and the second mounting section 104. The transition section 106 is a recessed area of the housing 100.

In an embodiment, a diversion tunnel 600 is formed between the backflow tray 702 and the inner wall of the casing 100, and in the gas flow direction, the diversion tunnel 600 includes a diffusion tunnel 602 and a backflow tunnel 604 that are communicated. Wherein, the caliber of the diffusion air duct 602 gradually increases along the airflow flowing direction, and the caliber of the return air duct 604 is unchanged.

An embodiment of a second aspect of the present invention proposes a vacuum cleaner comprising: a fan assembly according to any of the preceding claims.

The dust collector provided by the embodiment comprises the fan assembly of any embodiment. Therefore, all the advantages of the fan assembly described above are not discussed herein.

In particular, the dust collector provided by the embodiment can be a handheld dust collector, has the characteristics of miniaturization and is convenient for users to use.

In a specific embodiment, when the fan assembly provided in this embodiment is applied to a handheld cleaner, since the first impeller 300 and the second impeller 500 are disposed on two sides of the driving component 200, the center of gravity of the rotation shaft 806 is guaranteed to be closer to the driving component 200 or to be directly located at the position of the driving component 200, so that the suspension force and the radial moment at two ends of the rotation shaft 806 are reduced, and further the radial load generated by the first impeller 300 and the radial load generated by the second impeller 500 are offset, so that the stability of the driving component 200 in the rotation process of driving the rotation shaft 806 is greatly improved, and the running stability of the driving component 200 is also guaranteed.

In addition, due to the cooperation of the first impeller 300 and the second impeller 500, the air-feeding capability of the handheld dust collector can be realized, and meanwhile, the working noise of the handheld dust collector can be effectively reduced. The driving member 200 is located between the first impeller 300 and the second impeller 500, and thus functions to balance the load. In addition, due to the cooperation among the plurality of components such as the diffusion air duct 602, the backflow air duct 604, the flow guiding structure and the diffuser 400, the structural size of the handheld dust collector is effectively reduced, and particularly the radial size of the handheld dust collector is reduced, so that the handheld operation of a user is convenient, and the handheld dust collector can be stretched into a narrow space for internal action.

In a specific embodiment, as shown in fig. 1, 2 and 3, the fan assembly provided in this embodiment includes a housing 100, a first impeller 300, a diffuser duct 602, a return duct 604, a rotating shaft 806, a driving component 200, a flow guiding structure, a second impeller 500, and a diffuser 400. The gas in the casing 100 flows from the first impeller 300 to the second impeller 500, so that the gas in the casing 100 flows through the driving component 200 and can exchange heat with the driving component 200, and the gas flow carries away the heat of the driving component 200, thereby realizing the cooling effect on the driving component 200.

In a specific embodiment, as shown in fig. 1, 2 and 3, the fan assembly provided in this embodiment includes a first impeller 300, a diffuser duct 602, a return duct 604, a bearing 808, a magnetic member 202, a winding 204, a second impeller 500, fins 108, and a diffuser 400. The air flow enters the fan from the first impeller 300, is diverted and rectified through the diffusion air duct 602 and the return air duct 604, enters the gap of the winding 204, enters the second impeller 500 after cooling the winding 204, is continuously pressurized, and is finally discharged into the atmosphere after being subjected to speed reduction and pressurization through the diffuser 400.

As shown in fig. 2 and 3, bearings 808 are respectively located at two ends of the magnetic member 202, and radial and axial positioning functions are implemented by the mounting seat 800.

As shown in fig. 2 and 3, the mount 800 is coupled to the housing 100 by a bracket 804. The bracket 804 is characterized by a thin end and a thick middle.

Wherein the first impeller 300 and the second impeller 500 are respectively mounted at both ends of the magnetic member 202 and outside the bearing 808. As shown in fig. 3, the shafting mass distribution is more uniform, and the rotor stability is stronger.

In the specific embodiment, the fins 108 are connected to the outer wall of the housing 100 and the first and second mounting

sections

102, 104 by 28 metal sheets, and serve to assist in cooling the drive member 200.

In the fan assembly provided by the embodiment, the single cantilever structure of the traditional driving component 200 is changed into a double-support structure by adopting the mode of arranging the driving component 200, so that the stability of the driving component 200 of the fan assembly is improved, the air flow passes through the winding 204 of the driving component 200, and the driving component 200 is directly cooled by utilizing the high-speed air flow of the fan assembly, so that the operation efficiency of the driving component 200 is improved.

Other alternatives of the technical solution in this embodiment are as follows:

in a particular embodiment, the bearing 808 is a ball bearing, but is not limited to a rolling bearing.

In particular embodiments, the first impeller 300 and the second impeller 500 may be diagonal flow impellers and axial flow impellers.

In a specific embodiment, the driving part 200 is located in the middle of the two stages of the first impeller 300 and the second impeller 500, and is supported by the mounting seats 800 and the bearings 808 on both sides.

In an exemplary embodiment, the first impeller 300 and the second impeller 500 are co-axially disposed, and the air flow passes through the windings 204 to dissipate heat from the drive member 200.

In the description of the present invention, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan assembly, comprising:

a rotating shaft;

the driving component is arranged on the rotating shaft;

the first impeller is arranged on the rotating shaft and is positioned at one side of the driving part;

the diffuser is arranged on the other side of the driving part;

a second impeller disposed on the rotation shaft between the driving member and the diffuser, and configured to cancel a radial load generated by the first impeller and a radial load generated by the second impeller, the second impeller being configured to supply air from the first impeller to the diffuser;

the shell comprises an air inlet and an air outlet which are communicated, the rotating shaft extends from the air inlet to the air outlet, the first impeller is positioned at the air inlet, and the diffuser is positioned at the air outlet;

the mounting seat comprises a seat body and a bracket, wherein the seat body is positioned in the shell, and the bracket is connected to the inner walls of the seat body and the shell;

the bearing is arranged in the mounting seat, and the rotating shaft penetrates through the bearing;

the thickness of the bracket is gradually increased and then gradually decreased along the airflow flowing direction.

2. The fan assembly of claim 1, further comprising:

the two ends of the guide air duct are respectively communicated with the air outlet end of the first impeller and the air inlet end of the second impeller;

and the caliber of at least part of the diversion air duct is gradually increased along the airflow flowing direction.

3. The fan assembly of claim 2 wherein the air conduction duct comprises:

the diffusion air duct is communicated with the air outlet end of the first impeller;

the backflow air duct is communicated with the diffusion air duct and the air inlet end of the second impeller;

the caliber of the diffusion air duct is gradually increased along the airflow flowing direction.

4. The fan assembly of claim 3 wherein,

the first impeller is a centrifugal impeller;

the diffusion air duct comprises at least one bending part, the diffusion air duct is positioned at two sides of the first impeller, and the backflow air duct is positioned between the first impeller and the second impeller.

5. The fan assembly of claim 3, further comprising:

and the reflux structure is arranged between the first impeller and the second impeller.

6. The fan assembly of claim 5 wherein the return structure comprises:

the backflow disc is arranged in the shell, and the diversion air duct is formed between the backflow disc and the inner wall of the shell;

and the guide vane is arranged on the backflow disc and is at least partially positioned in the backflow air duct.

7. The fan assembly of any of claims 1-6 wherein,

the diffuser is an axial flow diffuser;

the diffuser comprises at least one group of diffusion blades, and any group of diffusion blades are annularly distributed.

8. The fan assembly of claim 7 wherein the fan assembly comprises,

the diffuser includes at least a plurality of groups of the diffuser blades;

the number of the diffusion blades of each group is gradually increased along the flow direction of the air flow; and/or

The rotation angle of each group of diffusion blades gradually decreases along the airflow flowing direction.

9. The fan assembly of any of claims 1-6 wherein,

a concave area is arranged on the shell;

the shell further comprises fins, wherein the fins are arranged on the shell and located in the concave areas.

10. A vacuum cleaner, comprising: the fan assembly of any of claims 1-9.