Cross-flow fan

Abstract

The utility model relates to the technical field of cross-flow fan damping units, in particular to a cross-flow fan which comprises a fan body, an outer rotor motor is mounted on one side of the fan body, a motor base is mounted on the side, away from the fan body, of the outer rotor motor, and a damping unit is mounted on the motor base; a cushioning piece is installed on the side, close to the draught fan body, of the outer rotor motor, and the outer rotor motor is connected with the air duct through a motor base. According to the air conditioner, the damping unit and the cushioning piece are arranged, when the outer rotor motor is installed in the air duct through the motor base, vibration is generated when the outer rotor motor rotates, the damping unit installed on the motor base absorbs part of energy generated by vibration generated by the outer rotor motor, and the concentricity deviation of the front bearing and the rear bearing caused by vibration of the motor shaft is reduced; therefore, the noise of the external rotor motor in subsequent use is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of crossflow fan damping units, and in particular to a crossflow fan. Background Art

[0002] The main components of the motor include the rotor, stator and other parts. In the brushless DC motor that is currently used more frequently, the stator of the motor is outside and the rotor is inside. In order to meet the technical requirements of some electronic machinery, the stator armature is placed inside in the structural design, and the rotor is placed outside to form a rotor shell. This is the outer rotor structure; among them, the advantages of the outer rotor motor are that it can run quickly after starting, with low power consumption, high speed, high efficiency, and long service life. However, the outer rotor motor has poor sealing, large rotor inertia, high noise, and high requirements for dynamic balance.

[0003] At present, an outer rotor motor is generally used as a power source in the air duct of the crossflow impeller of the indoor unit of the air conditioner. In order to better improve the space utilization inside the indoor unit of the air conditioner, when installing the outer rotor motor, the outer rotor motor is fixedly installed on one side of the air duct of the crossflow impeller through a pre-assembled motor seat, and then assembled with one end of the crossflow impeller through the rotor casing of the outer rotor motor.

[0004] However, the existing outer rotor motor and motor base are mainly connected by metal rigid connection methods such as welding or interference fit, which makes it easy for the outer rotor motor to continuously transmit vibrations to the base when running at high speed, causing the concentricity of the front and rear bearings of the motor shaft to deviate, affecting the coaxiality, thereby aggravating the noise of the outer rotor motor in subsequent use. Long-term use under this condition is not conducive to extending the service life of the equipment. Therefore, there is room for further improvement. Summary of the invention

[0005] In order to reduce the occurrence of equipment damage caused by the continuous transmission of vibration between the outer rotor motor and the base and extend the service life of the equipment, the present application provides a cross-flow blower.

[0006] The crossflow fan provided in this application adopts the following technical solution:

[0007] A cross-flow fan comprises a fan body, an outer rotor motor is mounted on one side of the fan body, a motor seat is mounted on the side of the outer rotor motor away from the fan body, a shock absorbing unit is mounted on the motor seat; a shock absorbing component is mounted on the side of the outer rotor motor close to the fan body, and the outer rotor motor is connected to the air duct through the motor seat.

[0008] By adopting the above technical solution, a shock-absorbing unit and a shock-absorbing component are set. When the outer rotor motor is installed in the air duct through the motor seat, the outer rotor motor generates vibration when it rotates. The shock-absorbing unit installed on the motor seat will absorb part of the energy generated by the vibration generated by the outer rotor motor, reduce the concentricity deviation of the front and rear bearings of the motor shaft caused by the vibration, thereby reducing the noise of the outer rotor motor in subsequent use and extending the service life of the equipment.

[0009] Optionally, the shock absorbing unit is arranged on the motor base in an annular structure, and a plurality of elastic cavities are evenly spaced apart on the shock absorbing unit.

[0010] By adopting the above technical solution, a cavity is opened on the shock absorbing unit. The cavity can be used to increase the softness and elasticity of the shock absorbing unit, so that the shock absorbing unit can better absorb and reduce vibration. Each elastic cavity can be deformed when the shock absorbing unit is in motion, thereby dispersing and reducing the transmission of vibration.

[0011] Optionally, the number of the cavities is six.

[0012] By adopting the above technical solution, six cavities are set up. The six cavities can disperse and distribute the vibration energy more evenly, which helps to avoid the energy generated by the outer rotor motor from being concentrated in a specific area of ​​the shock absorbing unit. The six cavities can share more pressure and reduce the load of a single cavity, thereby extending the service life of the shock absorbing unit.

[0013] Optionally, the shock absorbing unit includes a first fixed shell, a first telescopic rod, and an arc-shaped connecting plate, one side of the arc-shaped connecting plate abuts against the motor seat, the side of the arc-shaped connecting plate away from the motor seat is connected to one end of the first telescopic rod, and the end of the first telescopic rod away from the arc-shaped connecting plate is connected to the inner side of the first fixed shell; the arc-shaped connecting plate is elastic.

[0014] By adopting the above technical solution, the arc connecting plate is elastic. By cooperating with the first telescopic rod, the outer rotor motor generates vibration after starting. The elastic arc connecting plate and the telescopic first telescopic rod can be deformed to reduce the impact of the vibration.

[0015] Optionally, there are twelve first telescopic rods and four arc-shaped connecting plates, and the four arc-shaped connecting plates are installed in a ring shape on the motor base in sequence. Each arc-shaped connecting plate is installed with three first telescopic rods, and the first telescopic rods are each installed with a first return spring, which is used in conjunction with the first telescopic rod.

[0016] By adopting the above technical solution, a first return spring is provided. When the arc-shaped connecting plate and the first telescopic rod assist the motor seat in absorbing the shock of the outer rotor motor, the first return spring can assist in the movement. When the outer rotor motor stops, the first return spring resets the first telescopic rod.

[0017] Optionally, the shock absorbing unit includes a second fixed shell, a fixed block, and a second telescopic rod, one end of the second telescopic rod is hinged on the motor seat, one end of the second telescopic rod away from the motor seat is installed on the fixed block, and the fixed block is fixedly installed on the inner side of the second fixed shell away from the second telescopic rod; the fixed block is elastic.

[0018] By adopting the above technical solution and setting a fixed block, when the outer rotor motor is working, the elastic fixed block and the retractable second telescopic rod absorb the vibration generated by the outer rotor motor, thereby reducing the vibration of the motor base.

[0019] Optionally, the second fixed shell is rectangular, there are four fixed blocks, and they are respectively installed at the four corners inside the second fixed shell; the fixed block is provided with a connecting port near one end of the second telescopic rod, a connecting rod is installed in the connecting port, the second telescopic rod is connected to the fixed block via the connecting rod, and the second telescopic rod is suspended.

[0020] By adopting the above technical solution, the second telescopic rod is installed in a suspended state in the second fixed shell, which reduces the contact between the second telescopic rod and the motor base. When the motor base is vibrated, the second telescopic rod is extended and retracted to help the motor base disperse the impact force, thereby improving the stability of the motor base, thereby extending its service life and improving the overall durability of the cross-flow blower.

[0021] Optionally, a second return spring is arranged inside the second telescopic rod.

[0022] By adopting the above technical solution, a second return spring is provided. When the second telescopic rod and the fixed block dampen the motor seat, the second return spring can assist in movement. When the outer rotor motor stops, the second return spring resets the second telescopic rod.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Set up a shock-absorbing unit and a shock-absorbing component. When the outer rotor motor is installed in the air duct through the motor seat, the outer rotor motor generates vibration when it rotates. The shock-absorbing unit installed on the motor seat will absorb part of the energy generated by the vibration of the outer rotor motor, reduce the deviation of the concentricity of the front and rear bearings caused by the vibration of the motor shaft, thereby reducing the noise of the outer rotor motor in subsequent use and extending the service life of the equipment;

[0025] 2. The arc-shaped connecting plate is elastic. By cooperating with the first telescopic rod, the outer rotor motor generates vibration after starting. The elastic arc-shaped connecting plate and the telescopic first telescopic rod can be deformed to reduce the impact of the vibration;

[0026] 3. A second return spring is provided. When the second telescopic rod and the fixed block reduce the vibration of the motor seat, the second return spring can assist in the movement. When the outer rotor motor stops, the second return spring resets the second telescopic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of this embodiment 1.

[0028] Figure 2 This is the front view of the outer rotor motor.

[0029] Figure 3 This is a schematic diagram of the structure of the fan body of Example 1.

[0030] Figure 4 It is a schematic diagram of the overall structure of Example 2.

[0031] Figure 5 It is a cross-sectional view of the shock absorbing unit in Example 2.

[0032] Figure 6 It is a schematic diagram of the overall structure of embodiment 3.

[0033] Figure 7 It is a cross-sectional view of the shock absorbing unit in Example 3.

[0034] Description of reference numerals:

[0035] 1. Fan body; 2. External rotor motor; 3. Motor seat; 4. Shock absorber; 5. Shock absorbing unit; 51. First fixed shell; 52. First telescopic rod; 53. Arc-shaped connecting plate; 54. First return spring; 55. Second fixed shell; 56. Second telescopic rod; 57. Fixed block; 58. Second return spring; 59. Connecting port; 6. Cavity; 7. Connecting rod. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-7 This application is described in further detail.

[0037] The embodiment of the present application discloses a cross-flow blower.

[0038] Embodiment 1:

[0039] Reference Figure 1 , 23. A crossflow fan comprises a fan body 1, an outer rotor motor 2 is mounted on one side of the fan body 1, a shock absorbing member 4 is mounted on the side of the outer rotor motor 2 connected to the fan body 1, a motor base 3 is mounted on the side of the outer rotor motor 2 away from the fan body 1, the motor base 3 is used to be connected to the air duct, and a shock absorbing unit 5 is mounted on the side of the motor base 3 away from the outer rotor motor 2;

[0040] The damping unit 5 is annularly structured and sleeved on the motor base 3 . In the present embodiment, six elastic cavities 6 are uniformly and circumferentially formed on one side of the motor base 3 away from the outer rotor motor 2 .

[0041] Embodiment 2:

[0042] Reference Figure 4 , 5 The difference between this embodiment and embodiment 1 is that the structure of the shock absorbing unit 5 is different.

[0043] The shock absorbing unit 5 includes a first fixed shell 51, a first telescopic rod 52, and an arc-shaped connecting plate 53. The first fixed shell 51 is sleeved on the motor base 3. The first telescopic rod 52 and the arc-shaped connecting plate 53 are located between the motor base 3 and the first fixed shell 51. One end of the arc-shaped connecting plate 53 is tightly connected to the motor base 3, and the other end of the arc-shaped connecting plate 53 is connected to the first telescopic rod 52. The end of the first telescopic rod 52 away from the arc-shaped connecting plate 53 is connected to the inner side of the first fixed shell 51. The elastic arc-shaped connecting plate 53 cooperates with the first telescopic rod 52 to absorb the vibration generated by the motor shaft.

[0044] In this embodiment, there are four groups of arc-shaped connecting plates 53, and the four groups of arc-shaped connecting plates 53 are evenly spaced and installed in a surrounding manner on the motor base 3. Correspondingly, three first telescopic rods 52 are arranged on each group of arc-shaped connecting plates 53, totaling twelve telescopic rods. Each first telescopic rod 52 is provided with a reset spring for resetting, and the reset spring assists the telescopic action of the first telescopic rod 52 and helps the first telescopic rod 52 to be reset.

[0045] Embodiment 3:

[0046] Reference Figure 6 , 7 The difference between this embodiment and embodiment 1 is that the structure of the shock absorbing unit 5 is different.

[0047] The shock absorbing unit 5 includes a second fixed housing 55, a second telescopic rod 56, and a fixed block 57. The second fixed housing 55 is sleeved on the motor base 3. The second telescopic rod 56 and the fixed block 57 are located between the motor base 3 and the second fixed housing 55. One end of the second telescopic rod 56 is hinged on the motor base 3, and the other end of the second telescopic rod 56 is connected to the fixed block 57. The end of the fixed block 57 away from the second telescopic rod 56 is connected to the inside of the second fixed housing 55. The elastic fixed block 57 cooperates with the second telescopic rod 56 to absorb the vibration generated by the motor shaft.

[0048] In this embodiment, the second fixed shell 55 is rectangular, and there are four fixed blocks 57. The four fixed blocks 57 are respectively installed at the four corners of the inner side of the second fixed shell 55. Correspondingly, there are four second telescopic rods 56 that are respectively connected to the fixed blocks 57, so that the second telescopic rods 56 are set in a suspended state, and each second telescopic rod 56 is installed with a second return spring 58; a connecting port 59 is opened at one end where the fixed block 57 is connected to the second telescopic rod 56, and a connecting rod 7 for being hinged to the second telescopic rod 56 is installed in the connecting port 59.

[0049] The implementation principle of a cross-flow fan in an embodiment of the present application is as follows: when an outer rotor motor 2 is installed in the air duct through a motor base 3, vibration is generated when the outer rotor motor 2 rotates, and a shock absorbing unit 5 installed on the motor base 3 absorbs part of the energy generated by the vibration generated by the outer rotor motor 2, thereby reducing the concentricity deviation of the front and rear bearings of the motor shaft caused by the vibration, thereby reducing the noise of the outer rotor motor 2 during subsequent use and extending the service life of the equipment.

[0050] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A crossflow fan, characterized in that: The invention comprises a fan body (1), an outer rotor motor (2) being mounted on one side of the fan body (1), a motor seat (3) being mounted on the side of the outer rotor motor (2) away from the fan body (1), and a shock absorbing unit (5) being mounted on the motor seat (3); a shock absorbing component (4) being mounted on the side of the outer rotor motor (2) close to the fan body (1), and the outer rotor motor (2) being connected to an air duct via the motor seat (3).

2. A crossflow fan according to claim 1, characterized in that: The shock absorbing unit (5) is arranged on the motor seat (3) in an annular structure, and a plurality of elastic cavities (6) are evenly spaced apart on the shock absorbing unit (5).

3. A crossflow fan according to claim 2, characterized in that: The number of the cavities (6) is six.

4. A crossflow fan according to claim 1, characterized in that: The shock absorbing unit (5) comprises a first fixed shell (51), a first telescopic rod (52), and an arc-shaped connecting plate (53); one side of the arc-shaped connecting plate (53) is in contact with the motor seat (3); the side of the arc-shaped connecting plate (53) away from the motor seat (3) is connected to one end of the first telescopic rod (52); the end of the first telescopic rod (52) away from the arc-shaped connecting plate (53) is connected to the inner side of the first fixed shell (51); and the arc-shaped connecting plate (53) is elastic.

5. A cross flow fan according to claim 4, characterized in that: There are twelve first telescopic rods (52) and four arc-shaped connecting plates (53). The four arc-shaped connecting plates (53) are sequentially mounted on the motor seat (3) in a ring shape. Three first telescopic rods (52) are mounted on each arc-shaped connecting plate (53). A first return spring (54) is mounted on each of the first telescopic rods (52). The first return spring (54) is used in conjunction with the first telescopic rod (52).

6. A crossflow fan according to claim 1, characterized in that: The shock absorbing unit (5) comprises a second fixed shell (55), a fixed block (57), and a second telescopic rod (56); one end of the second telescopic rod (56) is hinged on the motor seat (3); one end of the second telescopic rod (56) away from the motor seat (3) is mounted on the fixed block (57); and a side of the fixed block (57) away from the second telescopic rod (56) is fixedly mounted on the inner side of the second fixed shell (55); the fixed block (57) is elastic.

7. A cross flow fan according to claim 6, characterized in that: The second fixed shell (55) is rectangular, and there are four fixed blocks (57) which are respectively installed at the four corners inside the second fixed shell (55); a connecting port (59) is provided at one end of the fixed block (57) close to the second telescopic rod (56), and a connecting rod (7) is installed in the connecting port (59); the second telescopic rod (56) is connected to the fixed block (57) via the connecting rod (7), and the second telescopic rod (56) is suspended.

8. A cross flow fan according to claim 7, characterized in that: A second return spring (58) is arranged inside the second telescopic rod (56).

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