Dust collector motor

Abstract

According to the dust collector motor, the rear fixed impeller and the front fan cover are installed on the outer side of the motor body, the movable impeller is arranged in the fan cover and installed on the motor body, and the motor body drives the movable impeller to rotate to suck external air into the fan cover, so that airflow is generated in the fan cover; the fixed impeller is provided with three-dimensional spiral blades for guiding airflow, the fixed impeller is provided with a front stage and a rear stage which are identical in rotation direction, and the spiral angles of the blades of the two stages of fixed impellers are different. Due to the fact that the blade helical angles of the front-stage fixed impeller and the rear-stage fixed impeller are different, airflow is disturbed when passing through the junction of the front-stage fixed impeller and the rear-stage fixed impeller to generate rotational flow, the rotational flow rolls away dust attached to the blades of the fixed impellers, and therefore dust is not prone to being accumulated on the fixed impellers of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a vacuum cleaner motor. Background Art

[0002] A vacuum cleaner motor is a motor that generates airflow inside a vacuum cleaner. It is commonly used in equipment with vacuuming functions, including sweeping robots. The vacuum cleaner motor has a fixed impeller at the rear and a hood at the front installed on the outside of the motor body. The hood is equipped with a moving impeller, which is installed on the motor body. The motor body drives the moving impeller to rotate and draws outside air into the hood to form an airflow. The fixed impeller is equipped with three-dimensional spiral blades to guide the airflow so that the airflow flows along a predetermined path. Since the dust carried in the airflow easily adheres to the blades of the fixed impeller, the fixed impeller needs to be removed and cleaned regularly. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a vacuum cleaner motor whose stator wheel is not prone to dust accumulation.

[0004] In order to solve the above technical problems, the present invention provides a vacuum cleaner motor, which is equipped with a rear fixed impeller and a front wind hood on the outside of the motor body, a movable impeller is provided in the wind hood, and the movable impeller is installed on the motor body. The motor body drives the movable impeller to rotate to draw outside air into the wind hood to generate airflow in the wind hood. The fixed impeller is provided with three-dimensional spiral blades to guide the airflow. The fixed impeller has two stages, front and rear, with the same rotation direction, and the blade spiral angles of the two stages of fixed impellers are different.

[0005] Furthermore, a heat dissipation air duct is left between the front and rear stages of the stator impellers and leads to the inner side of the motor body.

[0006] Furthermore, the heat dissipation duct specifically leads to the stator of the motor body.

[0007] Furthermore, a diversion port leading to the heat dissipation air duct is opened at the front end of the wheel wall of the front stator impeller.

[0008] Furthermore, there are multiple diversion ports, which are arranged circumferentially.

[0009] Furthermore, a guide vane for guiding air at the diversion port extends inward from the wheel wall of the stator impeller.

[0010] Since the blade spiral angles of the front and rear stator impellers are different, the airflow will be disturbed when passing through the junction of the front and rear stator impellers to generate vortex flow, which will sweep away the dust attached to the stator impeller blades. Therefore, the stator impeller of this motor is not easy to accumulate dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a vacuum cleaner motor.

[0012] Figure 2 It is a schematic diagram of a cross-section of a vacuum cleaner motor.

[0013] Figure 3 yes Figure 2 A partial enlarged picture of Figure 2 The A part.

[0014] Figure 4 It is a schematic diagram of a two-stage stator impeller.

[0015] Figure 5 It is a schematic diagram of the front stator impeller.

[0016] Figure 6 yes Figure 5 A partial enlarged picture of Figure 5 Part B. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with specific implementation methods.

[0018] Vacuum cleaner motor Figure 1 and Figure 2 , including a motor body 1, on the outside of which are mounted two fixed front and rear stator impellers 21 and 22. Figure 2 and Figure 4 The two-stage fixed impellers 21 and 22 are provided with three-dimensional spiral blades 211 and 221 with the same rotation direction, and the blade spiral angles of the two-stage fixed impellers 21 and 22 are different. A wind hood 3 is installed on the front fixed impeller 21, and the wind hood 3 is located in front of the fixed impeller 21 and also located outside the motor body 1. A movable impeller 4 is arranged in the wind hood 3, and the movable impeller 4 is installed on the driving shaft 11 of the motor body 1. The air inlet 30 of the wind hood 3 is smaller than the air inlet 40 of the movable impeller 4. During operation, the driving shaft 11 of the motor body 1 drives the movable impeller 4 to rotate and draw the outside air backward into the wind hood 3, thereby generating airflow in the wind hood 3. The blades 211 and 221 of the front and rear two-stage fixed impellers 21 and 22 successively guide the airflow so that the airflow flows backward along a predetermined path. Since the blade spiral angles of the front and rear two-stage stator impellers 21, 22 are different, the airflow will be disturbed when passing through the junction of the front and rear two-stage stator impellers 21, 22, thereby generating a vortex, and the vortex will sweep away the dust attached to the blades 211, 221 of the stator impellers 21, 22. Therefore, the stator impellers 21, 22 of the motor are not easy to accumulate dust.

[0019] See 2 and Figure 3A heat dissipation duct 20 is left between the front and rear stator impellers 21 and 22. The heat dissipation duct 20 leads to the stator 12 inside the motor body 1. Part of the airflow will enter the heat dissipation duct 20 when passing through the junction of the front and rear stator impellers 21 and 22, and then pass through the stator 20 of the motor body 1, taking away the heat of the stator 20 and cooling the stator 20. If the blade helix angles of the front and rear stator impellers 21 and 22 are the same, when the airflow flows in the front and rear stator impellers 21 and 22, it may be difficult to effectively enter the heat dissipation duct 20 because the path is single and smooth. Figure 2 and Figure 4 In the vacuum cleaner motor of the present invention, since the blade helix angles of the front and rear stator impellers 21 and 22 are different, the airflow will be disturbed when passing through the junction of the front and rear stator impellers 21 and 22. This disturbance makes the airflow path complicated, which helps the airflow to better enter the heat dissipation duct 20, thereby better cooling the stator 12 of the motor body 1. Figure 3 and Figure 5 The front end of the wheel wall of the front stator impeller 21 is provided with a diversion port 215, and the diversion port 215 leads to the heat dissipation duct 20. Figure 5 and Figure 6 The stator wheel 21 has a guide vane 216 extending inward from the wheel wall, and the guide vane 216 is located at the diversion port 215. There are multiple diversion ports 215 arranged circumferentially, and there are multiple guide vanes 216. Figure 2 and Figure 3 When part of the airflow flows along the blades 211 of the front impeller 21, it will enter the heat dissipation duct 20 from the diversion port 215 to dissipate heat for the stator 20 of the motor body 1. During this process, the guide blades 216 guide the air for the diversion port 215 to prevent the airflows from different diversion ports 215 from colliding with each other.

[0020] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.

Claims

1. A vacuum cleaner motor, which has a fixed impeller at the rear and a wind shield at the front installed outside the motor body, a movable impeller is arranged in the wind shield, and the movable impeller is installed on the motor body. The motor body drives the movable impeller to rotate to draw the outside air into the wind shield, thereby generating airflow in the wind shield, and the fixed impeller is provided with a three-dimensional spiral blade for airflow guidance, characterized in that: The stator impeller has two stages, front and rear, with the same rotation direction, and the blade helix angles of the two stages are different.

2. The motor according to claim 1, characterized in that: A heat dissipation duct is left between the front and rear stages of the stator impellers to lead to the inner side of the motor body.

3. The motor according to claim 2, characterized in that: The heat dissipation duct specifically leads to the stator of the motor body.

4. The motor according to claim 2, characterized in that: A diversion port leading to a heat dissipation air duct is provided at the front end of the wheel wall of the front fixed impeller.

5. The motor according to claim 4, characterized in that: There are multiple diversion ports, which are arranged circumferentially.

6. The motor according to claim 4 or claim 5, characterized in that: The wheel wall of the fixed impeller is provided with an air guide vane extending inwardly for guiding air at the diversion port.

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