Patent Application
20190368507
The present disclosure relates to vacuum cleaners and their accessories, and more particularly to a fan assembly for a robot vacuum cleaner and a robot vacuum cleaner.
With the diversification of the cleaning manners, a robot vacuum cleaner appears in more and more families. The operation manner of the robot vacuum cleaner is mainly divided into “suction” and “sweep”. Similar to a traditional vacuum cleaner, the “suction” of the robot vacuum cleaner cannot do without a fan, and a structure of the fan is closely related to magnitude of a “suction force”. Generally, the fan type applied in the robot vacuum cleaner includes an axial fan A as illustrated in
To address the above-described technical problem, embodiments of the present disclosure provide a fan assembly for a robot vacuum cleaner and a robot vacuum cleaner.
To this end, a technical solution of the present application is implemented such that:
Embodiments of the present disclosure provide a fan assembly for a robot vacuum cleaner. The fan assembly includes an electric motor, a stator impeller, a rotor impeller and a fan cover. The stator impeller has a shaft hole, the electric motor is mounted on a side of the stator impeller, and an output shaft of the electric motor passes through the shaft hole. The fan cover is mounted on another side of the stator impeller, and an end surface of the fan cover away from the stator impeller defines an air inlet. The rotor impeller is mounted to the output shaft of the electric motor and located between the fan cover and the stator impeller.
In the above-described solution, the fan cover has a cylindrical shape matching the rotor impeller, the air inlet is circular, and a ratio of a diameter of the air inlet to a diameter of the fan cover or the rotor impeller ranges from 1/5 to 4/5.
In the above-described solution, the ratio of the diameter of the air inlet to the diameter of the fan cover is 2/5.
In the above-described solution, the stator impeller includes a front impeller disc, a rear impeller disc and a plurality of blades;
the front impeller disc includes a round plate and a ring rim, the ring rim is disposed around a circumferential edge of the round plate and extends towards the electric motor, and the shaft hole is located in a center of the round plate;
the rear impeller disc includes a bottom plate and a first protruding rim, the bottom plate defines a first round hole at a middle thereof, the first protruding rim is disposed on the bottom plate along a circumferential edge of the first round hole and extends towards the fan cover; and
the plurality of blades is fixed between the ring rim and the first protruding rim and spaced from one another, and gaps among the plurality of blades form a plurality of air-guiding passages.
In the above-described solution, the fan assembly further includes a first fastener, the electric motor has a first mounting hole, the round plate has a second mounting hole corresponding to the first mounting hole, and the first fastener passes through the first mounting hole and the second mounting hole to fasten the electric motor to the side of the stator impeller.
In the above-described solution, the fan cover is fitted over an outside of the first protruding rim, and the fan cover is in interference fit with the first protruding rim.
In the above-described solution, the fan assembly further includes a support seat and a second fastener, the stator impeller is mounted on the support seat;
the support seat includes a base plate and a first leg, the base plate defines a second round hole at a middle thereof, the base plate is provided with the first leg at two ends of the second round hole along the radial direction of the second round hole respectively; and
the rear impeller disc further includes a second leg provided at two ends of the first round hole along a radial direction of the first round hole respectively, the second fastener passes through the first leg and the second leg to fasten the stator impeller to the support seat.
In the above-described solution, the first leg is provided with a bump, the second leg defines a groove matching the bump, and the bump extends into the groove.
In the above-described solution, the rear impeller disc further includes a second protruding rim, the second protruding rim is disposed on the bottom plate along the circumferential edge of the first round hole and extends towards the electric motor; and
the base plate defines an annular groove matching the second protruding rim along a circumferential edge of the second round hole, and the second protruding rim is snapped into the annular groove.
Embodiments of the present disclosure further provide a robot vacuum cleaner, and the robot vacuum cleaner includes the above-described fan assembly for the robot vacuum cleaner.
Embodiments of the present disclosure provide the fan assembly for the robot vacuum cleaner and the robot vacuum cleaner, the electric motor is used to provide power to enable the output shaft of the electric motor to drive the rotor impeller to rotate, such that the air entering the fan cover from the air inlet is thrown to a periphery of the rotor impeller to generate a suction force. The air flow thrown to the periphery of the rotor impeller flows to an outlet along the gaps among the blades of the stator impeller. The stator impeller can effectively guide the air flow to make the fan has a more smooth air outlet and a prominent airflow direction, thereby improving the suction force and the dust suction effect of the fan.
Additional aspects and advantages of embodiments of present disclosure will be given in part in the following descriptions, become apparent in part from the following descriptions, or be learned from the practice of the embodiments of the present disclosure.
These and other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following descriptions made with reference to the drawings, in which:
electric motor 10; output shaft 11; first mounting hole 12; stator impeller 20; round plate 21; blade 22; bottom plate 23; second leg 24; shaft hole 25; second mounting hole 26; first protruding rim 27; second protruding rim 201; first round hole 28; ring rim 29; rotor impeller 30; fan cover 40; air inlet 41; support seat 50; base plate 51; first leg 52; bump 53; second round hole 54; annular groove 55; wire-running notch 60.
In order to make objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the embodiments described herein are a part but not all of the embodiments of the present application. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art fall into the protection scope of the present application.
In the specification, it is to be understood that terms such as “upper,” “lower,” “inner,” and “outer” should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present disclosure be constructed or operated in a particular orientation. In addition, terms such as “first” and “second” are used herein for purposes of description and are not intended to indicate or imply relative importance or significance.
In the present disclosure, unless specified or limited otherwise, the terms “mounted,” “connected,” “coupled,” “fixed” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements. The above terms can be understood by those skilled in the art according to specific situations.
Embodiments can provide a fan assembly for a robot vacuum cleaner, as illustrated in
In the embodiment shown in
In an alternative implementation, the fan cover 40 can have a cylindrical shape matching the rotor impeller 30, the air inlet 41 is circular, and a ratio of a diameter of the air inlet 41 to a diameter of the fan cover 40 or the rotor impeller 30 ranges from 1/5 to 4/5. Further, the ratio of the diameter of the air inlet 41 to the diameter of the fan cover 40 is 2/5.
At the same power level of the electric motor 10, when the ratio of the diameter of the air inlet 41 to the diameter of the fan cover 40 or rotor impeller 30 is 1/5 to 4/5, the suction force of the fan assembly is relatively large.
In another alternative implementation, the stator impeller 20 can include a front impeller disc, a rear impeller disc and a plurality of blades 22. The front impeller disc includes a round plate 21 and a ring rim 29, the ring rim 29 is disposed around a circumferential edge of the round plate 21 and extends towards the electric motor 10, and the shaft hole 25 is located in a center of the round plate 21. The rear impeller disc includes a bottom plate 23 and a first protruding rim 27, the bottom plate 23 defines a first round hole 28 at a middle thereof, and the first protruding rim 27 is disposed on the bottom plate 23 along a circumferential edge of the first round hole 28 and extends towards a direction of the fan cover 40. The plurality of blades 22 is fixed between the ring rim 29 and the first protruding rim 27 and spaced from one another, and gaps among the plurality of blades 22 form a plurality of air-guiding passages.
The airflow entering the fan assembly is discharged from the first round hole 28 under the guiding of the blades 22. The plurality of blades 22 are evenly disposed at intervals along an axis of the stator impeller 20, and the number of the blades 22 can be adjusted according to requirements. The stator impeller 20 is further provided with a plurality of wire-running notches 60 which facilitates the mounting and positioning of wire harness of the fan assembly.
In an alternative implementation, the fan assembly for the robot vacuum cleaner further includes a first fastener (not illustrated), the electric motor 10 defines a first mounting hole 12, the round plate 21 defines a second mounting hole 26 corresponding to a first mounting hole 12, and the first fastener passes through the first mounting hole 12 and the second mounting hole 26 to fasten the electric motor 10 to the side of the stator impeller 20.
In order to ensure the stability of the connection between the stator impeller 20 and the electric motor 10, a plurality of first fasteners, a plurality of first mounting holes 12 and a plurality of second mounting holes 26 may be provided according to requirements. The first fastener includes but is not limited to a bolt and a screw. As illustrated in
In another alternative implementation, the fan cover 40 is fitted over an outside of the first protruding rim 27, and the fan cover 40 is in interference fit with the first protruding rim 27.
As illustrated in
In another alternative implementation, the fan assembly for the robot vacuum cleaner further includes a support seat 50 and a second fastener, and the stator impeller 20 is mounted on the support seat 50. The support seat 50 includes a base plate 51 and a first leg 52, the base plate 51 defines a second round hole 54 at a middle thereof, and the base plate 51 is provided with the first leg 52 at two ends of the second round hole 54 along a radial direction of the second round hole 54 respectively. The rear impeller disc further includes a second leg 24 disposed at two ends of the first round hole 28 along a radial direction of the first round hole 28, and the second fastener passes through the first leg 52 and the second leg 24 to fasten the stator impeller 20 to the support seat 50.
The support seat 50 can be made of a material with the noise and vibration reduction function. For example, the support seat 50 is a rubber member. As the stator impeller 20 is connected to the electric motor 10, when the electric motor 10 is in operation, the vibration will occur on the electric motor 10 itself or between the electric motor 10 and the stator impeller 20 to generate the noise. The support seat 50 can absorb acoustic wave and reduce the vibration and noise. In order to facilitate the positioning and mounting of wire harness of the fan assembly, the support seat 50 may also be provided with the wire-running notch 60 according to requirements. The second fastener includes but is not limited to the bolt and the screw. As illustrated in
In another alternative implementation, the first leg 52 is provided with a bump 53, the second leg 24 defines a groove matching the bump 53, and the bump 53 extends into the groove.
The initial assembly can be completed by extending the bump 53 into the groove, thereby facilitating the mounting and positioning. The second fastener improves the stability of the connection between the both.
In an alternative implementation, the rear impeller disc further includes a second protruding rim 201, and the second protruding rim 201 is disposed on the bottom plate 23 along the circumferential edge of the first round hole 28 and extends towards the direction of the electric motor 10. The base plate 51 defines an annular groove 55 matching the second protruding rim 201 along the circumferential edge of the second round hole 54, and the second protruding rim 201 is snapped into the annular groove 55.
The second protruding rim 201 is snapped into the annular groove 55, such that not only the fitting of the stator impeller 20 and the support seat 50 can be more compact, but also the sealing effect can be improved, effusion of the airflow within the fan assembly can be reduced, and the suction force of the fan assembly can be promoted.
The robot vacuum cleaner according to the present disclosure includes the fan assembly for the robot vacuum cleaner of the above embodiments. Since the fan assembly for the robot vacuum cleaner according to embodiments of the present disclosure has the above-described effect, the robot vacuum cleaner according to embodiments of the present disclosure also has the corresponding technical effect, i.e. the structure is compact. The stator impeller 20 can effectively guide the air flow to make the fan has a more smooth air outlet and a prominent airflow direction, thereby improving the suction force of the fan assembly and ground suction effect and ground suction efficiency of the robot vacuum cleaner.
Other structures and operations of the robot vacuum cleaner according to embodiments of the present disclosure are appreciable and readily achieved, which thus will not be described in detail herein.
The above-described are merely preferred embodiments of the present disclosure, which are not intended to limit the protection scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201820837853.4 | May 2018 | CN | national |
This application is a continuation of International Application No. PCT/CN2018/098020, filed on Aug. 1, 2018, which claims priority to Chinese Patent Application Serial No. 201820837853.4, filed with the State Intellectual Property Office of P. R. China on May 30, 2018, the entire content of which is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2018/098020 | Aug 2018 | US |
| Child | 16128540 | US |
