WO2022134963A1

WO2022134963A1 - Fan assembly and vacuum cleaner

Info

Publication number: WO2022134963A1
Application number: PCT/CN2021/131379
Authority: WO
Inventors: 秦杰; 胡小文; 胡斯特; 张龙新; 曾振杰
Original assignee: 广东美的白色家电技术创新中心有限公司; 美的集团股份有限公司
Priority date: 2020-12-25
Filing date: 2021-11-18
Publication date: 2022-06-30
Also published as: CN114673675A; CN114673675B

Abstract

Provided in the present application are a fan assembly and a vacuum cleaner, the fan assembly comprising: a rotating shaft; a driving component which is disposed on the rotating shaft; a first impeller which is disposed on the rotating shaft and located on one side of the driving component; a diffuser which is disposed on the other side of the driving component; and a second impeller which is disposed on the rotating shaft and located between the driving component and the diffuser, the second impeller being configured to supply air from the first impeller to the diffuser. According to the fan assembly provided in the present application, the first impeller and the second impeller are arranged on two sides of the driving component, which to an extremely large extent improves the stability of the driving component when same drives the rotating shaft to rotate. Moreover, the operating stability of the driving component is also guaranteed, and the fan assembly has the advantages of high air supply efficiency and a small radial size.

Description

Fan Assembly and Vacuum Cleaner

This application claims the priority of the Chinese patent application with the application number "202011559399.9" and the invention title "Fan Assembly and Vacuum Cleaner", which was submitted to the State Intellectual Property Office of China on December 25, 2020, the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the field of household appliances, in particular, to a fan assembly and a vacuum cleaner.

Background technique

With the improvement of people's quality of life, vacuum cleaners are gradually favored by consumers due to their advantages of small size, light weight and convenient use. In order to improve the use quality of the vacuum cleaner, that is, to improve the suction power of the vacuum cleaner while reducing the noise. At present, major manufacturers turn their attention to multi-stage fan technology, but multi-stage fans have long axial dimensions, poor rotor stability, complex structure, and high processing and manufacturing costs.

SUMMARY OF THE INVENTION

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

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

A second aspect of the present application provides a vacuum cleaner.

A first aspect of the present application provides a fan assembly, comprising: a rotating shaft; a driving part, disposed on the rotating shaft; a first impeller, disposed on the rotating shaft, on one side of the driving part; a diffuser, disposed on the other side of the driving part One side; the second impeller, which is arranged on the rotating shaft and is located between the driving part and the diffuser, and is configured to supply air from the first impeller to the diffuser.

The fan assembly proposed in this application includes a rotating shaft, a driving component, a first impeller, a diffuser and a second impeller. Wherein, a first impeller driving part and a second impeller are arranged on the rotating shaft in sequence, and the first impeller, the second impeller and the diffuser can be used together to drive the air flow from the air inlet to the casing under the action of the first impeller. body and discharge the casing from the air outlet under the action of the diffuser. In addition, the driving component is located between the first impeller and the second impeller, thereby balancing the load.

During the operation of the fan assembly, the driving component drives the rotating shaft to rotate, thereby driving the first impeller and the second impeller to rotate. The first impeller rotates at the air inlet, thereby sucking in the external air flow, and driving the air flow to the second impeller; Air outlet. In particular, since the first impeller and the second impeller are arranged on both sides of the driving member, it is ensured that the center of gravity of the rotating shaft is closer to the driving member during operation, or is directly located at the position where the driving member is located, which reduces the suspension force at both ends of the rotating shaft and Radial moment, so that the radial load generated by the first impeller and the radial load generated by the second impeller cancel each other, which greatly improves the stability of the driving part in the process of driving the rotating shaft to rotate, and also ensures the stability of the driving part. Operational stability.

In addition, since the gas inside the casing flows from the first impeller to the second impeller, the gas inside the casing will flow through the driving part and can exchange heat with the driving part, so that the air flow can take away the heat of the driving part, and realize the The cooling effect of the driving components can effectively reduce the operating temperature of the driving components, thereby ensuring the service life of the driving components.

In addition, through the cooperation of the first impeller and the second impeller, the working noise of the fan assembly can be effectively reduced while ensuring the air supply capacity of the fan assembly, and through the design of the diffuser, the radial dimension of the fan assembly can be greatly reduced , under the condition that the fan assembly can realize the air supply of the secondary impeller, it is ensured that the radial size of the fan assembly will not increase, so that the radial size of the fan assembly proposed in the present application is similar to the fan assembly with a single impeller in the related art. , and ensure that the flow efficiency of the airflow is improved.

In the fan assembly proposed in the present application, the driving components are 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 can cancel each other, which greatly improves the The driving component has the stability during the rotation process of the driving shaft, and also ensures the running stability of the driving component, and has the advantages of high air supply efficiency and small radial size.

A second aspect of the present application provides a vacuum cleaner, comprising: the fan assembly of the above-mentioned first aspect.

The vacuum cleaner proposed in the present application includes the fan assembly of the above-mentioned first aspect. Therefore, it has all the beneficial effects of the above-mentioned fan assembly, and will not be discussed one by one here.

In particular, the vacuum cleaner proposed in the present application can be a hand-held vacuum cleaner, and has a miniaturized structure, which is convenient for users to use.

Additional aspects and advantages of the present application will become apparent in the description section below, or learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of a fan assembly according to an embodiment of the present application;

Figure 2 is a cross-sectional view of the fan assembly of the embodiment shown in Figure 1;

3 is a schematic diagram of a part of the structure of the fan assembly of the embodiment shown in FIG. 1;

4 is a schematic structural diagram of a mounting seat in the fan assembly of the embodiment shown in FIG. 1;

Fig. 5 is the front view of the mounting seat of the embodiment shown in Fig. 4;

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

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

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

FIG. 9 is a schematic structural diagram of the backflow structure in the fan assembly of the embodiment shown in FIG. 1 .

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 9 is:

100 housing, 102 first installation section, 104 second installation section, 106 transition section, 108 fins, 110 air inlet, 112 air outlet, 200 drive parts, 202 magnetic parts, 204 windings, 300 first impeller, 302 The first turntable, 304 the first blade, 306 the first air guide cover, 400 diffuser, 402 diffuser blades, 500 the second impeller, 502 the second turntable, 504 the second blade, 506 the second wind guide cover, 600 guide Flow duct, 602 diffuser duct, 604 return duct, 700 return structure, 702 return disc, 704 guide vane, 706 accommodating groove, 708 arc, 800 mounting seat, 802 seat body, 804 bracket, 806 rotating shaft, 808 bearing.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific implementation disclosed below. example limitations.

The following describes the fan assembly and the vacuum cleaner provided according to some embodiments of the present application with reference to FIGS. 1 to 9 . Among them, the arrows in FIG. 2 indicate the gas flow direction.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , an embodiment of the first aspect of the present application proposes a fan assembly, including: a rotating shaft 806 ; a driving component 200 , which is arranged on the rotating shaft 806 ; and a first impeller 300 , which is arranged on the rotating shaft. 806, located on one side of the driving part 200; the diffuser 400, arranged on the other side of the driving part 200; the second impeller 500, arranged on the rotating shaft 806, located between the driving part 200 and the diffuser 400, the first The second impeller 500 is configured to send air from the first impeller 300 to the diffuser 400 .

The fan assembly proposed in this embodiment includes a rotating shaft 806 , a driving component 200 , a first impeller 300 , a diffuser 400 and a second impeller 500 . The first impeller 300 , the driving member 200 and the second impeller 500 are arranged on the rotating shaft 806 in sequence, and the first impeller 300 , the second impeller 500 and the diffuser 400 can be used together to drive the airflow from the first impeller 300 It is sucked into the housing 100 from the air inlet 110 under the action of the diffuser 400 and discharged from the housing 100 from the air outlet 112 under the action of the diffuser 400 . In addition, the driving part 200 is located between the first impeller 300 and the second impeller 500 , thereby playing a role of balancing the load.

As shown in FIG. 2 , during the operation of the fan assembly, the driving component 200 drives the rotating 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 airflow, and driving the airflow to flow to the second impeller 500; after the airflow flows to the second impeller 500, it further flows to the diffuser under the driving of the second impeller 500 400, 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 arranged on both sides of the driving member 200 , it is ensured that the center of gravity of the rotating shaft 806 is closer to the driving member 200 during operation, or is directly located at the driving member 200 . The location reduces the suspension force and radial moment at both ends of the rotating shaft 806, so that the radial load generated by the first impeller 300 and the radial load generated by the second impeller 500 cancel each other out, which greatly improves the driving component 200. The stability of the driving shaft 806 during the rotation process is ensured, and the running stability of the driving component 200 is also ensured.

In addition, since the gas inside the casing 100 flows from the first impeller 300 to the second impeller 500 , the gas inside the casing 100 will flow through the driving part 200 and can exchange heat with the driving part 200 , so that the air flow can take away the driving part The heat of 200 achieves a cooling effect on the driving component 200 , which can effectively reduce the operating temperature of the driving component 200 , thereby ensuring the service life of the driving component 200 .

In addition, through the cooperation of the first impeller 300 and the second impeller 500, the working noise of the fan assembly can be effectively reduced while ensuring the air supply capacity of the fan assembly, and through the design of the diffuser 400, the fan assembly can be greatly reduced. The radial dimension, in the case of ensuring that the fan assembly can achieve air supply by the secondary impeller, ensures that the radial size of the fan assembly will not increase, which can make the fan assembly proposed in this embodiment and the fan assembly with a single impeller in the related art. The radial dimensions are similar, and the flow efficiency of the air flow is guaranteed to be improved.

In the fan assembly proposed in the present application, the driving component 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 can cancel each other out. The stability of the driving member 200 during the rotation of the driving shaft 806 is greatly improved, and the running stability of the driving member 200 is also ensured, and 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 , so 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 supply capacity of the fan assembly, thereby reducing the radial dimension of the fan assembly itself, so as to achieve The structure miniaturization and compact design of the fan assembly are achieved. In a specific embodiment, as shown in FIGS. 7 and 8 , both the first impeller 300 and the second impeller 500 use centrifugal impellers.

Through the cooperation of the first impeller 300 and the second impeller 500, the fan assembly proposed in the present application can effectively reduce the working noise of the fan assembly while ensuring the air supply capacity of the fan assembly. The radial size of the fan assembly is reduced, and the radial size of the fan assembly is not increased under the condition that the fan assembly can realize the air supply of the secondary impeller, so that the present embodiment proposes the fan assembly and the single impeller in the related art. The radial dimensions of the fan components are similar, and the flow efficiency of the gas is guaranteed to be improved.

In an embodiment of the present application, as shown in FIG. 1 and FIG. 2 , the fan assembly further includes: a casing 100 , the casing 100 includes an air inlet 110 and an air outlet 112 that communicate with each other, and the rotating shaft 806 extends from the air inlet 110 Extending 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 communicated with each other, and the rotating shaft 806 is located inside the housing 100 and extends from the air inlet 110 to the air outlet 112 . The first impeller 300 is disposed at the inlet of the casing 100 , and the diffuser 400 is disposed at the air outlet 112 of the casing 100 , thereby driving the air flow from the air inlet 110 into the interior of the casing 100 and from the air outlet 112 discharge.

As shown in FIG. 2 , during the operation of the fan assembly, the driving component 200 drives the rotating shaft 806 to drive the first impeller 300 and the second impeller 500 to rotate. The first impeller 300 rotates at the air inlet 110, and then sucks the external airflow from the air inlet 110 into the interior of the casing 100; The gas flowing to the second impeller 500 flows to the diffuser 400 under the driving of the second impeller 500 , and under the diffusing action of the diffuser 400 It is discharged from the air outlet 112 .

In an embodiment of the present application, as shown in FIG. 2 and FIG. 3 , the fan assembly further includes: a mounting base 800 , the mounting base 800 includes a base body 802 and a bracket 804 , the base body 802 is located in the housing 100 , and the bracket 804 is connected On the inner wall of the seat body 802 and the housing 100; the bearing 808 is arranged in the mounting seat 800, and the rotating shaft 806 passes through the bearing 808; wherein, as shown in FIG. 4 and FIG. 5, along the airflow direction, the thickness of the bracket 804 first gradually increase, and then gradually decrease.

In this embodiment, the fan assembly also includes a mount 800 and a bearing 808 . The mounting seat 800 includes a seat body 802 and a bracket 804 , a bearing 808 is arranged in the seat body 802 to support the rotating shaft 806 and the first impeller 300 , the second impeller 500 and the diffuser 400 arranged on the rotating shaft 806 , and the bracket 804 The base body 802 is connected to the inner wall of the housing 100 . During the operation of the fan assembly, the rotating shaft 806 can drive the first impeller 300 , the second impeller 500 and the diffuser 400 to rotate smoothly.

In a specific embodiment, a mounting seat 800 and a bearing 808 are respectively provided on both sides of the driving component 200, so as to support the rotating shaft 806 from two positions.

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

Specifically, the bracket 804 is disposed protruding from the base body 802 , and the bracket 804 is intercepted by a plane perpendicular to the protruding direction of the bracket 804 , and the bracket 804 can be streamlined, shuttle-shaped, or spindle-shaped.

In an embodiment of the present application, as shown in FIG. 2 , the driving component 200 includes: a magnetic member 202 disposed on the rotating shaft 806 ; a winding 204 sleeved on the magnetic member 202 and disposed at an interval from the magnetic member 202 , the winding 204 It is configured to drive the magnetic member 202 to drive the rotating shaft 806 to rotate.

In this embodiment, drive member 200 includes magnets 202 and windings 204 . The magnetic member 202 is fixed 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 arranged at intervals. In this way, during the operation of the fan assembly, when the winding 204 is energized, a magnetic field will be generated to drive the magnetic member 202 to rotate, so that the magnetic member 202 drives the rotating shaft 806 to rotate, so that the rotating shaft 806 drives the first impeller 300 and the second impeller 500 to rotate , to ensure the driving of the gas.

In particular, the present application utilizes the winding 204 to directly drive the magnetic member 202 to drive the rotating shaft 806 , which can effectively simplify the structure of the driving member 200 and reduce the energy consumption in the power transmission structure compared with the driving method of the motor in the related art. loss, and the working efficiency of the driving component 200 is improved.

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

In an embodiment of the present application, as shown in FIG. 2 , the fan assembly further includes: a guide air duct 600 , and both ends of the guide air duct 600 are respectively connected to the air outlet end of the first impeller 300 and the air outlet of the second impeller 500 . The intake end; wherein, along the flow direction of the airflow, the diameter of at least part of the guide air duct 600 gradually increases.

In this embodiment, the fan assembly further includes an air guide duct 600 . Wherein, the guide air duct 600 is arranged inside the casing 100, the inlet of the guide air duct 600 is communicated with the outlet end of the first impeller 300, and the outlet of the guide air duct 600 is communicated with the intake end of the second impeller 500, Further, it plays a role of guiding flow between the first impeller 300 and the second impeller 500, thereby reducing the airflow loss.

In addition, along the flow direction of the airflow, the diameter of at least part of the guide air duct 600 gradually increases. That is, during the operation of the fan assembly, the airflow entering the inside of the guide structure will pass through a guide air duct 600 with a gradually increasing diameter. When the airflow passes through the part of the guide air duct 600 with the gradually increasing diameter, the effect of deceleration and boosting can be achieved, the noise of the airflow when the airflow is circulated in the part of the guide air duct 600 can be reduced, and the airflow pressure can be ensured.

In an embodiment of the present application, as shown in FIG. 6 and FIG. 7 , the diversion air duct 600 includes: a diffuser air duct 602, which is communicated with the air outlet end of the first impeller 300; a return air duct 604, which is connected to the diffuser The air duct 602 communicates with the intake end of the second impeller 500 ; wherein, along the flow direction of the airflow, the diameter of the diffuser air duct 602 gradually increases.

In this embodiment, the guide air duct 600 includes a diffuser air duct 602 and a return air duct 604 that are communicated with each other. Wherein, the diffuser air duct 602 communicates with the outlet end of the first impeller 300 , and the return air duct 604 communicates with the diffuser air duct 602 and the air inlet end of the second impeller 500 . In this way, during the operation of the fan assembly, the air flow, driven by the first impeller 300, first enters the diffuser air duct 602 of the guide air duct 600, and then passes through the return air duct 604 of the guide air duct 600, and passes through the air flow. Flow toward the second impeller 500 .

In particular, along the flow direction of the airflow, the diameter of the diffuser air duct 602 gradually increases. That is, when the airflow flows in the diffuser air duct 602, the flow velocity of the airflow decreases, and the air pressure inside the diffuser air duct 602 increases. With this design, the radial dimension of the first impeller 300 can be effectively reduced under the condition of ensuring the same air supply volume, thereby realizing the compactness and miniaturization of the fan assembly.

In an embodiment of the present application, as shown in FIG. 7 , the first impeller 300 is a centrifugal impeller; the diffuser air duct 602 includes at least one bend, the diffuser air duct 602 is located on both sides of the first impeller 300 , and the backflow The air duct 604 is located between the first impeller 300 and the second impeller 500 .

In this embodiment, the first impeller 300 adopts a centrifugal impeller, and the diffuser air duct 602 includes at least one bend. In this design, the axial direction of the first impeller 300 is disposed toward the air inlet 110 , and the radial direction of the first impeller 300 is used as the air outlet. In addition, the bending of the diffuser air duct 602 is located on the peripheral side of the first impeller 300, thereby ensuring that the diffuser air duct 602 is located on both sides of the first impeller 300, and is connected to the

air inlets

110 and 110 on both sides of the first impeller 300. The second impeller 500 .

In particular, the diameter of the diffuser air duct 602 along the flow direction of the airflow is gradually increased, and the diffuser air duct 602 itself is bent. In this way, the diffuser air duct 602 integrates the functions of diffuser and bend, so that the airflow in the diffuser air duct 602 can be decelerated and pressurized while turning, thereby reducing the radial dimension of the first impeller 300 .

In an embodiment of the present application, as shown in FIG. 1 , FIG. 2 and FIG. 9 , the fan assembly further includes: a return structure 700 disposed between the first impeller 300 and the second impeller 500 .

In this embodiment, the fan assembly further includes a return structure 700 . The recirculation structure 700 is arranged in the casing 100 and is located between the first impeller 300 and the second impeller 500 . The recirculation structure 700 is used in cooperation with the first impeller 300 , so that the airflow flows from the first impeller 300 to the recirculation structure 700 . Specifically, the recirculation structure 700 is sleeved on the rotating shaft 806, and plays the role of recirculation for the airflow blown radially from the first impeller 300, thereby changing the flow direction of the airflow blown radially from the first impeller 300, so that the partial airflow flow to the second impeller 500 .

Specifically, when the first impeller 300 is a centrifugal impeller, the first impeller 300 discharges air in a radial direction, and the second impeller 500 is located in the axial direction of the first impeller 300 . Therefore, in the present application, the recirculation structure 700 is used together with the first impeller 300 , so that the recirculation structure 700 plays a good role in guiding and recirculating, so that the airflow flows from the first impeller 300 to the second impeller 500 .

In an embodiment of the present application, as shown in FIG. 9 , the recirculation structure 700 includes: a recirculation tray 702 , which is disposed in the casing 100 , and the air guide duct 600 is formed between the recirculation tray 702 and the inner wall of the casing 100 ; The guide vanes 704 are disposed on the return disk 702 and are at least partially located in the return air duct 604 .

In this embodiment, the return structure 700 includes a return disk 702 and guide vanes 704 . Wherein, the radial end surface of the return disk 702 is configured as an arc 708, so that the return disk 702 and the interior of the casing 100 jointly define the guide air duct 600, and ensure the air guide duct 600 and the first impeller 300. The gas outlet ends are connected, so that the airflow driven by the first impeller 300 flows to the return structure 700 . In addition, the guide vanes 704 are disposed at least partially within the return air duct 604 . According to this design, during the operation of the fan assembly, the air flow enters the air guide duct 600 driven by the first impeller 300 , and flows to the second impeller 500 under the guide action of the guide vanes 704 , so that the return structure 700 Play a good role in rectification and racemization.

In the specific embodiment, during the operation of the fan, since the first impeller 300 is axially in and radially out, the airflow blown from the first impeller 300 flows toward the inner side wall of the casing 100 , and through the design of the backflow structure 700 , In particular, the flow direction of the airflow blown out from the first impeller 300 is changed through the cooperation of the guide channel and the guide vanes 704 , so that this part of the airflow flows toward the second impeller 500 . In addition, there is a gap between the return plate 702 and the rotating shaft 806, and the fan assembly will not rotate with the rotating shaft 806 during the operation of the fan assembly, but the airflow blown out from the first impeller 300 has a certain rotation direction. The design of the guide vanes 704 makes the airflow The flow in the gap between the two adjacent guide vanes 704 further plays the role of de-rotation, ensuring that the airflow is blown to the second impeller 500 smoothly, and avoiding the occurrence of eddy currents and other phenomena in the process of the airflow flowing to the second impeller 500, and then Avoid unnecessary noise inside the fan assembly.

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 turntable 302 , a first blade 304 and a first air guide hood 306 . The first turntable 302 is disposed on the shaft 806, and can drive the first blade 304 to rotate under the drive of the shaft 806; the first air guide hood 306 and the first turntable 302 are located on both sides of the first blade 304, and can be rotated at the During the operation, it plays the role of guiding the flow, thereby reducing the loss of the airflow under the action of the first impeller 300 . That is, during the operation of the first impeller 300 , the gas enters the interior of the first impeller 300 from the axial direction driven by the first blades 304 , and is guided by the first air guide hood 306 and the first turntable 302 Blow out radially.

In addition, as shown in FIG. 7 , the distance between the outer edge of the first air guide hood 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 position of the outlet end in the radial direction of the first impeller 300, the size of the first air guide hood 306 is longer than that of the first turntable 302. This design can control the airflow from the first impeller 300 to be blown out more evenly and smoothly, and ensure that the airflow blown out from the first impeller 300 has an included angle compared with the rotating shaft 806 itself, ensuring that the airflow blown out from the first impeller 300 is smooth. Enter into the guide air duct 600, and ensure that the flow loss and noise reduction of the airflow when turning in the guide air duct 600 is the lowest. Based on the above design, on the one hand, the air supply capacity of the fan assembly is ensured, and on the other hand, the noise and loss of the airflow in the air guide 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 , a second blade 504 and a second air guide cover 506 . The second turntable 502 is arranged on the shaft 806, and can drive the second blade 504 to rotate under the drive of the shaft 806; the second air guide hood 506 and the second turntable 502 are located on both sides of the second blade 504 and can During the operation, it plays a role of guiding the flow, thereby reducing the loss of the airflow under the action of the second impeller 500 . That is, during the operation of the second impeller 500 , the gas enters the interior of the second impeller 500 from the axial direction driven by the second blades 504 , and is guided by the second air guide hood 506 and the second turntable 502 Blow out radially.

In addition, as shown in FIG. 8 , the distance between the outer edge of the second air guide cover 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 size of the second air guide hood 506 is longer than that of the second turntable 502 . This design can control the airflow from the second impeller 500 to be blown out more evenly and smoothly, and ensure that the airflow blown out from the second impeller 500 has an included angle compared with the rotating shaft 806 itself, ensuring that the airflow from the second impeller 500 is smooth. Enter diffuser 400 with minimal flow loss noise reduction in turns. On the one hand, the air supply capability of the fan assembly is ensured, and on the other hand, the noise of the airflow in the air guide duct 600 is reduced.

In a specific embodiment, as shown in FIG. 7 , an accommodating groove 706 is provided on the end face of the return plate 702 facing the air inlet 110 , and the first rotating plate 302 of the first impeller 300 is at least partially accommodated in the accommodating groove 706 , and further It is ensured that the first turntable 302 and the part of the return disk 702 not provided with the accommodating groove 706 are arranged flush, so that the first air guide cover 306 of the first impeller 300 is arranged flush with the interior of the casing 100 . This design ensures that the radial outlet end of the first impeller 300 is aligned with the guide air duct 600, ensures that the first turntable 302 and the first air guide hood 306 are tangent to the inner wall of the guide air duct 600, and ensures that the air flow from the first When the impeller 300 enters the inside of the guide air duct 600, it will not receive resistance.

In an embodiment of the present application, as shown in FIG. 2 , the diffuser 400 is an axial flow diffuser; the diffuser 400 includes at least one set of diffuser vanes 402 , and any set of diffuser vanes 402 is annularly distributed .

In this embodiment, the diffuser 400 is provided as an axial flow diffuser. Wherein, the diffuser 400 includes at least one group of diffuser vanes 402, and any one group of diffuser vanes is annularly distributed at the air outlet. In this way, the axial flow diffuser ensures to greatly reduce the radial dimensions of the first impeller 300 and the second impeller 500 on the one hand, and ensures the air supply efficiency of the fan assembly on the other hand. And an axial flow diffuser can be used instead of a radial diffuser, thereby reducing the radial dimension of the fan assembly.

In one embodiment of the present application, as shown in FIG. 2 , the diffuser 400 includes at least a plurality of sets of diffuser vanes 402; along the flow direction of the airflow, the number of each set of diffuser vanes 402 gradually increases; and/or flows along the airflow direction, the rotation angle of each group of diffuser vanes 402 gradually decreases.

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

In addition, in the direction of airflow, the number of each group of diffuser vanes 402 gradually increases, and the rotational angle of each group of diffuser vanes 402 gradually decreases. In this way, the diffusing vanes 402 of the diffuser 400 can cooperate with each other to ensure the diffusing effect on the airflow, and at the same time, an axial flow diffuser including multiple sets of diffusing vanes 402 can be used instead of the radial diffuser, thereby Reduce the radial dimension of the fan assembly.

In an embodiment of the present application, as shown in FIG. 2 , the diffuser blade 402 is a three-element blade.

In this embodiment, the diffuser vanes 402 are ternary vanes. In particular, multiple ternary blades are used together to replace the radial diffuser, thereby reducing the radial dimension of the fan assembly.

In an embodiment of the present application, as shown in FIG. 1 and FIG. 2 , the casing 100 includes: a first installation section 102, where the first impeller 300 is located; and a second installation section 104, in which the second impeller 500 and the diffuser 400 are located in the second installation section 104; the transition section 106 is connected to the first installation section 102 and the second installation section 104 and is arranged.

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. The air inlet 110 is arranged on the axial end face of the first installation section 102, and the first impeller 300 is arranged in the first installation section 102; the air outlet 112 is arranged on the axial end face of the second installation section 104, and The second impeller 500 is arranged in the second installation section 104 ; the transition section 106 is arranged between the first installation section 102 and the second installation section 104 and is connected with the first installation section 102 and the second installation section 104 at the same time. The transition section 106 is the recessed area of the housing 100 .

In a specific embodiment, a guide air duct 600 is formed between the return plate 702 and the inner wall of the housing 100. In the gas flow direction, the guide air duct 600 includes a diffuser air duct 602 and a return air duct 604 that are communicated. Wherein, along the flow direction of the airflow, the diameter of the diffuser air duct 602 gradually increases, while the diameter of the return air duct 604 remains unchanged.

An embodiment of the second aspect of the present application provides a vacuum cleaner, including: a fan assembly according to any of the above technical solutions.

The vacuum cleaner proposed in this embodiment includes the fan assembly as in any of the above-mentioned embodiments. Therefore, it has all the beneficial effects of the above-mentioned fan assembly, and will not be discussed one by one here.

In particular, the vacuum cleaner proposed in this embodiment can be a hand-held vacuum cleaner, and has a miniaturized structure, which is convenient for users to use.

In a specific embodiment, when the fan assembly proposed in this embodiment is applied to a hand-held vacuum cleaner, since the first impeller 300 and the second impeller 500 are arranged on both sides of the driving part 200, it is ensured that the center of gravity of the rotating shaft 806 is closer during operation The driving member 200, or directly at the position where the driving member 200 is located, reduces the suspension force and radial moment at both ends of the rotating shaft 806, thereby making the radial load generated by the first impeller 300 and the radial load generated by the second impeller 500 mutually compatible. The cancellation greatly improves the stability of the driving component 200 during the rotation of the rotating shaft 806 , and also ensures the running stability of the driving component 200 .

Moreover, due to the cooperation between the first impeller 300 and the second impeller 500, the air supply capacity of the hand-held vacuum cleaner can be achieved, and the working noise of the hand-held vacuum cleaner can be effectively reduced. In addition, the driving part 200 is located between the first impeller 300 and the second impeller 500 , thereby playing a role of balancing the load. In addition, due to the cooperation between the diffuser air duct 602, the return air duct 604, the diversion structure and the diffuser 400, the structural size of the hand-held vacuum cleaner is effectively reduced, especially the diameter of the hand-held vacuum cleaner is reduced. On the one hand, it is convenient for users to handle it by hand, and on the other hand, it can be extended into a small space for action.

In a specific embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 3 , the fan assembly proposed in this embodiment includes a casing 100 , a first impeller 300 , a diffuser air duct 602 , a return air duct 604 , a rotating shaft 806 , and a driving component 200, the flow guide structure, the second impeller 500, the diffuser 400 and other structures. The gas inside the casing 100 flows from the first impeller 300 to the second impeller 500 , so the gas inside the casing 100 flows through the driving part 200 and can exchange heat with the driving part 200 , so that the air flow takes away the driving part 200 The cooling effect of the driving component 200 is realized.

In a specific embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 3 , the fan assembly proposed in this embodiment includes a first impeller 300 , a diffuser air duct 602 , a return air duct 604 , a bearing 808 , a magnetic member 202 , and windings 204, the second impeller 500, the fins 108, the diffuser 400 and other structures. The airflow enters the fan from the first impeller 300, is turned and rectified by the diffuser air duct 602 and the return air duct 604, and then enters the winding 204 gap. Exhaust to atmosphere after pressurization.

Among them, as shown in FIG. 2 and FIG. 3 , the bearings 808 are located at both ends of the magnetic member 202 respectively, and the radial and axial positioning functions are realized by the mounting seat 800 .

As shown in FIGS. 2 and 3 , the mounting base 800 is connected to the housing 100 through a bracket 804 . The bracket 804 is characterized in that the two ends are thin and the middle is thick.

Wherein, the first impeller 300 and the second impeller 500 are respectively installed on both ends of the magnetic member 202 and located outside the bearing 808 . As shown in Figure 3, the mass distribution of the shafting is more uniform and the rotor is more stable.

In a specific embodiment, the fins 108 are connected with the outer wall of the housing 100 and the first mounting section 102 and the second mounting section 104 by 28 metal sheets, and play a role of assisting cooling the driving component 200 .

In the fan assembly proposed in this embodiment, the single cantilever structure of the traditional drive member 200 is changed to a double support structure by adopting the driving member 200 in the middle, so as to improve the stability of the drive member 200 of the fan assembly, and the airflow passes through the drive member 200. The winding 204 of the fan assembly is used to directly cool the driving part 200 by using the high-speed air flow of the fan assembly itself, so as to improve the operation efficiency of the driving part 200 .

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

In a specific embodiment, the bearing 808 is a ball bearing, but is not limited to a rolling bearing.

In a specific embodiment, the first impeller 300 and the second impeller 500 may use a diagonal flow impeller and an axial flow impeller.

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

In a specific embodiment, the first impeller 300 and the second impeller 500 are arranged in the same direction, and the airflow flows through the winding 204 to dissipate heat to the driving component 200 .

In the description of this application, the term "plurality" refers to two or more than two, unless otherwise expressly defined, the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the drawings shown in the drawings The orientation or positional relationship is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the application; The terms "connected", "installed", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or through an intermediate connection. The medium is indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in this application at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. 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 are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

A fan assembly, comprising:

shaft;

a driving part, arranged on the rotating shaft;

a first impeller, which is arranged on the rotating shaft and is located on one side of the driving component;

a diffuser, arranged on the other side of the driving part;

A second impeller is provided on the rotating shaft between the driving member and the diffuser, and the second impeller is configured to send air from the first impeller to the diffuser.
The blower assembly of claim 1, further comprising:

a casing, the casing includes an air inlet and an air outlet that are communicated, the rotating shaft extends from the air inlet toward the air outlet, the first impeller is located at the air inlet, and the expanding The compressor is located at the air outlet.
The blower assembly of claim 2, further comprising:

a mounting seat, the mounting seat includes a seat body and a bracket, the seat body is located in the housing, and the bracket is connected to the seat body and the inner wall of the housing;

a bearing, which is arranged in the mounting seat, and the rotating shaft passes through the bearing;

Wherein, along the direction of airflow, the thickness of the support first gradually increases, and then gradually decreases.
The blower assembly of claim 2, further comprising:

a guide air duct, two ends of the guide air duct are respectively connected to the air outlet end of the first impeller and the air inlet end of the second impeller;

Wherein, along the flow direction of the air flow, the diameter of at least part of the guide air passages gradually increases.
The fan assembly of claim 4, wherein the air guide channel comprises:

a diffuser air duct, communicated with the air outlet end of the first impeller;

a return air duct, communicated with the diffuser air duct and the intake end of the second impeller;

Wherein, along the flow direction of the airflow, the diameter of the diffuser air duct gradually increases.
The blower assembly of claim 5, wherein:

The first impeller is a centrifugal impeller;

The diffuser air duct includes at least one bend, the diffuser air duct is located on both sides of the first impeller, and the return air duct is located between the first impeller and the second impeller.
The blower assembly of claim 5, further comprising:

The backflow structure is arranged between the first impeller and the second impeller.
The blower assembly of claim 7, wherein the return structure comprises:

a return plate, which is arranged in the casing, and the guide air channel is formed between the return plate and the inner wall of the casing;

The guide vanes are arranged on the return disk and are at least partially located in the return air duct.
A fan assembly according to any one of claims 1 to 8, wherein:

The diffuser is an axial flow diffuser;

The diffuser includes at least one group of diffuser vanes, and any one group of the diffuser vanes is annularly distributed.
The blower assembly of claim 9, wherein:

the diffuser includes at least a plurality of sets of the diffuser vanes;

along the flow direction of the airflow, the number of the diffuser vanes in each group is gradually increased; and/or

Along the flow direction of the airflow, the rotation angle of each group of the diffuser vanes gradually decreases.
A fan assembly according to any one of claims 2 to 8, wherein:

The casing is provided with a recessed area;

The housing further includes fins, and the fins are arranged on the housing and located in the recessed area.
A vacuum cleaner, comprising: the fan assembly according to any one of claims 1 to 11.