CN-115163530-B - Outer rotor fan and air conditioner

CN115163530BCN 115163530 BCN115163530 BCN 115163530BCN-115163530-B

Abstract

The invention discloses an outer rotor fan and an air conditioner, wherein the outer rotor fan comprises a stator assembly, a rotor assembly, a wind wheel and a flexible piece, the stator assembly comprises a stator frame, the rotor assembly comprises a rotor frame and a rotating shaft fixedly arranged on the rotor frame, the rotating shaft is rotatably arranged on the stator frame, a connecting piece is arranged at the periphery of the end part of the wind wheel and extends along the direction far away from the wind wheel, an accommodating space is formed between the connecting piece and the end part of the wind wheel, the rotor frame is accommodated in the accommodating space, the flexible piece is arranged between the rotor frame and the connecting piece, a first transmission structure is arranged between the flexible piece and the rotor frame, a second transmission structure is arranged between the flexible piece and the connecting piece, and the rotor frame is in transmission connection with the connecting piece through the first transmission structure and the second transmission structure so as to transmit torque generated by the rotor assembly to the wind wheel. The flexible piece can be stressed and compressed to absorb the vibration of the rotor assembly and the wind wheel, so that the damping effect is realized, and the purpose of reducing the noise of the fan is achieved.

Inventors

XU JINXIN
ZHENG LICHENG
LI WENRUI
WU DI

Assignees

广东威灵电机制造有限公司
威灵（芜湖）电机制造有限公司

Dates

Publication Date: 20260512
Application Date: 20220819

Claims (12)

1. An external rotor fan, comprising: a stator assembly including a stator frame; The rotor assembly comprises a rotor frame and a rotating shaft fixedly arranged on the rotor frame, and the rotating shaft is rotatably arranged on the stator frame; the wind wheel is characterized in that a connecting piece is arranged at the circumference of the end part of the wind wheel, the connecting piece extends along the direction away from the wind wheel, an accommodating space is formed between the connecting piece and the end part of the wind wheel, and the rotor frame is at least partially accommodated in the accommodating space; The rotor comprises a rotor frame, a flexible piece, a connecting piece and a first transmission structure, wherein the flexible piece is arranged in an annular mode along the outer peripheral surface of the rotor frame and is positioned between the rotor frame and the connecting piece, the first transmission structure is arranged between the flexible piece and the rotor frame, the second transmission structure is arranged between the flexible piece and the connecting piece, the rotor frame is in transmission connection with the connecting piece through the first transmission structure and the second transmission structure so as to transmit torque generated by the rotor assembly to the wind wheel, the first transmission structure comprises a plurality of first transmission bosses arranged at intervals and a plurality of first grooves arranged at intervals, one of the first transmission bosses and the first grooves is arranged on the outer peripheral surface of the rotor frame along the axial direction of the rotor frame, the other one of the first transmission bosses and the first grooves are arranged on the inner wall surface of the flexible piece in a one-to-one correspondence mode, and the first transmission bosses are arranged on the corresponding first grooves.
2. The outer rotor fan according to claim 1, wherein the connecting piece is annular, the second transmission structure comprises a plurality of second transmission bosses arranged at intervals and a plurality of second grooves arranged at intervals, one of the second transmission bosses and the second grooves is arranged on the inner wall surface of the connecting piece along the axial direction of the rotor frame, the other is arranged on the outer wall surface of the flexible piece, the second transmission bosses and the second grooves are arranged in one-to-one correspondence, and the second transmission bosses are arranged on the corresponding second grooves.
3. The outer rotor fan according to claim 2, wherein the first groove and the second groove are both formed in the flexible member, and a transmission part is formed between the adjacent first groove and second groove, and the thickness of the transmission part along the circumferential direction of the flexible member is greater than or equal to 2mm.
4. The outer rotor fan according to claim 3, wherein a receiving groove is formed between two adjacent first transmission bosses, the receiving groove penetrating through an outer peripheral surface of the rotor frame in an axial direction of the rotor frame.
5. The outer rotor fan according to claim 3, wherein a receiving groove is formed between two adjacent first transmission bosses, one end of the receiving groove, which is far away from the wind wheel, is closed, and the other end extends to the peripheral end edge of the rotor frame along the axial direction of the rotor frame.
6. The external rotor fan as claimed in claim 3, wherein the first groove is closed at one end near the wind wheel.
7. The external rotor fan as claimed in claim 1, wherein a rotation shaft positioning boss is provided at a side of the rotor frame adjacent to the wind wheel.
8. The outer rotor fan of claim 7, wherein an end plate is provided near the rotor frame at the end of the rotor, and wherein the end plate is provided with a relief hole for avoiding the shaft positioning boss.
9. The external rotor fan according to claim 1, wherein the elastic modulus of the rotor frame connected to the flexible member is E1, the elastic modulus of the connection member connected to the flexible member is E2, and the elastic modulus of the flexible member is less than or equal to (e1+e2)/10.
10. The outer rotor fan according to claim 1, wherein the stator frame is provided with a rubber ring, the rubber ring is provided with a sealing ring, the sealing ring extends to the rotating shaft along the radial direction of the rubber ring, the rubber ring is in interference fit with the circumferential surface of the stator frame, and the sealing ring is in abutting connection with the end edge of the stator frame close to the wind wheel.
11. The outer rotor fan according to claim 10, wherein the seal ring is provided with a protection lug which is inclined toward the wind wheel direction along the axial direction of the rotor, and a waterproof structure is formed between the protection lug and the connecting piece.
12. An air conditioner comprising the outer rotor fan according to any one of claims 1 to 11.

Description

Outer rotor fan and air conditioner Technical Field The invention relates to the technical field of household appliances, in particular to an outer rotor fan and an air conditioner. Background The conventional air conditioner reduces an axial space of the air conditioner by using an external rotor motor. In order to realize connection between a motor and a wind wheel, in the prior art, an outer rotor motor rotor assembly and the wind wheel are welded into a whole, so that the rotor assembly and a stator assembly cannot form an independent motor system, the control of the motor quality is not facilitated, meanwhile, the rotor assembly is directly welded with the wind wheel, vibration caused by electromagnetic force of the motor is easily amplified and transmitted through the wind wheel, noise is increased, and hearing is poor. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides an outer rotor fan which not only can ensure the axial space of the air conditioner, but also can integrate the motor and isolate the motor from the wind wheel, thereby solving the quality control and noise problems of the air conditioner. The invention also provides an air conditioner adopting the outer rotor fan. According to the embodiment of the invention, the outer rotor fan comprises a stator assembly, a rotor assembly, a wind wheel and a flexible piece, wherein the stator assembly comprises a stator frame, the rotor assembly comprises a rotor frame and a rotating shaft fixedly arranged on the rotor frame, the rotating shaft is rotatably arranged on the stator frame, a connecting piece is circumferentially arranged at the end part of the wind wheel, the connecting piece extends along the direction far away from the wind wheel, an accommodating space is formed between the connecting piece and the end part of the wind wheel, the rotor frame is at least partially accommodated in the accommodating space, the flexible piece is annularly arranged along the circumferential direction of the rotor frame and is positioned between the rotor frame and the connecting piece, a first transmission structure is arranged between the flexible piece and the rotor frame, a second transmission structure is arranged between the flexible piece and the connecting piece, and the rotor frame is in transmission connection with the connecting piece through the first transmission structure and the second transmission structure so as to transmit torque generated by the rotor assembly to the wind wheel. The external rotor fan at least has the advantages that the rotor assembly and the wind wheel are connected through the flexible piece arranged on the circumference of the rotor frame, torque generated by the rotor assembly is transmitted to the wind wheel through the flexible piece, electromagnetic torque is generated by the rotor assembly in the torque transmission sequence, the torque is transmitted to the flexible piece through the rotor frame, and then the torque is transmitted to the wind wheel through the flexible piece, and the flexible piece is stressed and compressed in the process to absorb vibration of the rotor assembly and the wind wheel, so that the purpose of reducing fan noise is achieved. The flexible piece isolates the rotor assembly from the wind wheel in the radial direction and the axial direction, so that the phenomenon that the rotor assembly and the wind wheel are mutually interfered is avoided; simultaneously, the rotor assembly and the wind wheel are connected through the flexible piece arranged on the circumference of the rotor frame and the connecting piece arranged along the circumference of the end part of the wind wheel, so that the axial distance between the motor and the wind wheel is reduced. According to some embodiments of the invention, the first transmission structure includes a plurality of first transmission bosses and a plurality of first grooves, wherein the first transmission bosses are arranged at intervals, one of the first transmission bosses and the first grooves extends along an axial direction of the rotor frame and is arranged on an outer peripheral surface of the rotor frame, the other transmission boss is arranged on an inner wall surface of the flexible member, the first transmission bosses and the first grooves are arranged in one-to-one correspondence, and the first transmission bosses are arranged in the corresponding first grooves. According to some embodiments of the invention, the connecting piece is annular, the second transmission structure comprises a plurality of second transmission bosses arranged at intervals and a plurality of second grooves arranged at intervals, one of the second transmission bosses and the second grooves extends along the axial direction of the rotor frame and is arranged on the inner wall surface of the connecting piece, the other one of the second transmission bosses