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CN-122001150-A - Dust collector motor

CN122001150ACN 122001150 ACN122001150 ACN 122001150ACN-122001150-A

Abstract

The invention discloses a dust collector motor, which relates to the field of dust collector motors and comprises a shell, a stator assembly, a rotor assembly, an upper wind guide structure and a lower wind guide structure, wherein the rotor assembly comprises a main shaft and an impeller, the upper wind guide structure is provided with a spiral upper wind guide channel, the lower wind guide structure is provided with a spiral lower wind guide channel, the spiral direction of the upper wind guide channel is the same as that of a blade, the spiral direction of the lower wind guide channel is opposite to that of the upper wind guide channel, the wind outlet cut-in angle of the upper wind guide channel is smaller than the wind inlet angle of the blade on the impeller, and the sum of the wind inlet cut-in angle of the lower wind guide channel and the wind outlet angle of the blade on the impeller is not larger than 90 degrees.

Inventors

  • LV MIN
  • Cai zhan

Assignees

  • 深圳市乘弋技术有限公司

Dates

Publication Date
20260508
Application Date
20260204

Claims (10)

  1. 1. A dust collector motor comprises a shell, a stator assembly and a rotor assembly, wherein the rotor assembly comprises a main shaft and an impeller fixed on the main shaft, the impeller comprises a hub and a plurality of blades arranged along the circumference of the hub, and the dust collector motor is characterized in that: The axial two sides of the impeller are respectively provided with a spiral upper air guide channel and a spiral lower air guide channel, the spiral direction of the lower air guide channel is opposite to that of the upper air guide channel, and the spiral direction of the upper air guide channel is the same as that of the blade; The air outlet cut-in angle of the upper air guide channel is smaller than the air inlet angle of the upper blade of the impeller, and the sum of the air inlet cut-in angle of the lower air guide channel and the air outlet angle of the impeller is not larger than 90 degrees.
  2. 2. A vacuum cleaner motor according to claim 1, wherein the outlet cut-in angle is less than 5 ° -15 ° from the inlet angle.
  3. 3. A vacuum cleaner motor according to claim 1, wherein the sum of the inlet cut angle of the lower air guide channel and the outlet angle of the upper vane of the impeller is 75 ° -90 °.
  4. 4. The motor of claim 1, wherein an end plate is disposed at an end of the housing away from the impeller, an air inlet is disposed on the end plate, an air inlet slot is disposed on a side wall of the housing, and air flows into the housing through the air inlet and the air inlet slot, and then into the upper air guide channel.
  5. 5. The motor of claim 1, wherein the upper air guiding structure comprises an upper outer ring structure, the upper outer ring structure encloses an upper cone cavity and a lower cone cavity, a coaxial upper inner ring is arranged in the upper cone cavity, the upper inner ring is connected with the upper outer ring structure through upper air guiding blades distributed circumferentially, two adjacent upper air guiding blades form an upper air guiding channel, and the impeller is arranged in the lower cone cavity.
  6. 6. The motor of claim 5, wherein two sides of the upper wind-guiding blade are respectively attached to the outer side arm of the upper inner ring and the inner wall of the upper cone cavity, and the lower end of the upper wind-guiding blade extends to the junction of the upper cone cavity and the lower cone cavity.
  7. 7. The motor of claim 5, wherein the hub has a conical shell structure and is provided with a through hole coaxial with the main shaft, the lower end of the main shaft penetrates through the upper inner ring and extends into the through hole, the blades spirally extend from the upper end to the lower end along the conical surface outside the hub, and an air channel is formed between two adjacent blades.
  8. 8. The vacuum cleaner motor according to claim 7, wherein the lower air guiding structure comprises a lower outer ring and a lower inner ring, the lower inner ring is connected with the lower outer ring through a lower air guiding blade, a conical shell is arranged at the upper end of the lower inner ring, a lower counter bore is arranged on the conical shell, the conical shell stretches into the hub, and a through hole part of the hub stretches into the lower counter bore.
  9. 9. The vacuum cleaner motor of claim 1, wherein the housing has a coaxial housing, the housing has a mounting slot, the stator assembly is disposed in the mounting slot, the upper air guiding structure is in butt joint with the housing, and the lower air guiding structure is in butt joint with the upper air guiding structure.
  10. 10. The motor of claim 1, wherein the distance between the air inlet of the impeller and the air outlet of the upper air guide channel is 0.5-1cm, and the distance between the air outlet of the impeller and the air inlet of the lower air guide channel is 0.5-1cm.

Description

Dust collector motor Technical Field The invention relates to the technical field of dust collector motors, in particular to a dust collector motor. Background With the development of household and commercial cleaners in light weight, high suction and low noise, a high-speed brushless motor has become a core component of the cleaner. The motor of the dust collector usually operates under the working condition of high rotating speed, and the impeller of the motor rotates at high speed to generate strong airflow for forming negative pressure required by dust collection. However, during high-speed operation, turbulence, backflow and pressure loss are easily generated in the air flow in the upstream and downstream areas of the impeller, so that the air outlet efficiency is limited, and the operation noise is remarkably increased. The motor of the existing dust collector improves the aerodynamic performance by optimizing a motor frame, a diffusion channel or an air outlet structure. The dyson technology limited company discloses in its chinese patent CN201611140022.3 a motor structure which is formed by arranging an inner wall and an outer wall in a frame and forming an annular channel therebetween, and simultaneously arranging diffusion blades in the annular channel to diffusion rectify the air flow generated by the impeller. According to the scheme, through the integrated design of the frame, the inner wall bears the rotor supporting function, the annular channel formed by the diffusion blades is utilized to improve the airflow diffusion effect, turbulence loss is reduced to a certain extent, but the annular channel formed by the diffusion blades is mainly subjected to natural diffusion after air is discharged, airflow entering the impeller is not pre-swirled, so that larger deviation exists between the air inlet angle and the air inlet angle of the blades of the impeller, airflow can be split when entering the impeller, vortex is formed between the impeller and the diffusion blades, vortex noise can be generated, the air discharge efficiency can be reduced, meanwhile, the airflow still carries larger tangential velocity component after the impeller discharges air, if the airflow cannot be rectified timely and effectively, backflow and noise sources are easily formed at the downstream, and the efficiency and the mute performance of the dust collector motor are not facilitated to be improved. Accordingly, the present invention is directed to a vacuum cleaner motor that solves the above problems. Disclosure of Invention Based on the above technical problems, it is necessary to provide a dust collector motor, in which the wind is pre-swirled through the upper wind guide channel of the upper wind guide structure, so that the cut-in angle of the airflow is matched with the wind inlet angle of the blade, the inflow loss of the airflow is reduced, the windward impact noise of the blade is effectively reduced, the tangential velocity component of the lower wind guide channel of the lower wind guide structure after the impeller is discharged can be rapidly eliminated, the backflow and secondary vortex are effectively inhibited, the high-efficiency wind discharge rate and the mute performance of the motor can be still maintained under the high-speed condition, and the dust collector motor is suitable for a high-speed brushless dust collector motor. In order to solve the technical problems, the invention adopts the following technical scheme: the motor of the dust collector comprises a shell, a stator assembly and a rotor assembly, wherein the rotor assembly comprises a main shaft and an impeller fixed on the main shaft, and the impeller comprises a hub and a plurality of blades arranged along the circumference of the hub; the upper air guide structure is arranged on one side of the axial upstream of the impeller and is provided with a spiral upper air guide channel; the lower air guide structure is arranged on one side of the axial downstream of the impeller and is provided with a spiral lower air guide channel; The spiral direction of the upper air guide channel is the same as the spiral direction of the blade, and the spiral direction of the lower air guide channel is opposite to the spiral direction of the upper air guide channel; The radial included angle of the air-out air flow direction of the upper air guide channel relative to the main shaft is an air-out cut-in angle, the radial included angle of the air-in air flow direction of the lower air guide channel relative to the main shaft is an air-in cut-in angle, and the radial included angles of the air-in air flow direction and the air-out air flow direction of the impeller relative to the main shaft are an air-in angle and an air-out angle; The air outlet cut-in angle of the upper air guide channel is smaller than the air inlet angle of the upper blade of the impeller, and the sum of the air inlet cut-in angle of the lower air guide channel and the air outlet an