Driving device for air purifier

Abstract

The driving device for the air purifier comprises an installation base, a wind wheel and a motor, a plurality of air outlets are formed in the installation base in the circumferential direction at intervals, and an upper installation groove with a downward opening is formed in the lower portion of the installation base; the wind wheel comprises an upper wind guide plate, a lower wind guide ring and a plurality of fan blades arranged between the upper wind guide plate and the lower wind guide ring, the fan blades are arranged at equal intervals in the circumferential direction, a connecting convex part is arranged on the upper portion of the upper wind guide plate, a lower mounting groove with an upward opening is formed in the connecting convex part, and the connecting convex part is located in the upper mounting groove; the motor comprises a machine core, a rotating shaft and a lower shell with an upward opening, the machine core is fixedly installed on the upper portion of the upper installation groove, the lower shell is embedded in the lower installation groove, the upper end of the rotating shaft is connected with the machine core, the lower end of the rotating shaft is connected with the center of the lower shell, and a heat dissipation gap is formed between the lower shell and the machine core. Vibration and noise are reduced, the heat dissipation efficiency of the motor is improved, and the operation stability of the motor and the purification capacity of the air purifier are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air purifiers, in particular to a driving device for air purifiers. Background Art

[0002] An air purifier is a machine used to purify air. The driving device mainly includes a motor and a wind wheel. Usually, a shaft hole matching the motor shaft is set in the center of the wind wheel. During production and assembly, the motor shaft is inserted into the shaft hole to complete the installation of the motor and the wind wheel. The dynamic balance of the motor shaft and the dynamic balance of the wind wheel are adjusted independently. However, when the shaft hole and the shaft are installed, the coaxiality will inevitably produce a certain error, which leads to a certain eccentricity of the wind wheel. When the wind wheel rotates faster and faster, the eccentricity will cause the noise to increase, accompanied by vibration and noise.

[0003] On the other hand, the wind wheel is provided with an upper air guide plate and a lower fixed ring. The air is sucked into the wind wheel from the lower fixed ring and guided to the surroundings through the lower fixed ring. The air cannot be blown into the inside of the motor, which leads to low heat dissipation efficiency of the motor. The motor is easily burned under long-term high-power operation and has poor stability. Therefore, it is necessary to improve it. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a driving device for an air purifier, which reduces vibration and noise, improves the heat dissipation efficiency of the motor, and improves the operating stability of the motor and the purification capacity of the air purifier.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a driving device for an air purifier, comprising a mounting seat, a wind wheel and a motor, the mounting seat is provided with a plurality of air outlets spaced apart in the circumferential direction, and the lower part of the mounting seat is provided with an upper mounting groove with an opening facing downward;

[0006] The wind wheel includes an upper wind guide plate, a lower wind guide ring and a plurality of wind blades arranged between the upper wind guide plate and the lower wind guide ring, wherein the wind blades are arranged at equal intervals along the circumferential direction, a connecting convex portion is arranged on the upper portion of the upper wind guide plate, a lower mounting groove with an opening facing upward is arranged on the connecting convex portion, and the connecting convex portion is located in the upper mounting groove;

[0007] The motor includes a movement, a rotating shaft and a lower shell with an opening facing upward. The movement is fixedly installed on the upper part of the upper mounting groove, the lower shell is embedded in the lower mounting groove, the upper end of the rotating shaft is connected to the movement, and the lower end of the rotating shaft is connected to the center of the lower shell. There is a heat dissipation gap between the lower shell and the movement.

[0008] In a further technical solution, the upper air guide plate includes a circular fixed portion and an annular upper air guide portion, the lower portion of the upper air guide portion is formed on the outer edge of the fixed portion, the connecting protrusion is a cylindrical connecting protrusion, the lower end portion of the connecting protrusion is formed on the upper portion of the fixed portion, the diameter of the upper end portion of the upper air guide portion is greater than the diameter of the lower end portion, and the lower portion of the upper air guide portion is provided with an arc-shaped first upper air guide surface.

[0009] In a further technical solution, an outer edge of the upper mounting groove is provided with an upwardly inclined arc-shaped second upper air guide surface, the second upper air guide surface is located between the air outlet and the upper mounting groove, and an air guide gap is provided between the first upper air guide surface and the second upper air guide surface.

[0010] In a further technical solution, the outer diameter of the upper air guide portion is greater than the inner diameter of the upper mounting groove.

[0011] In a further technical solution, a fixing boss is provided at the center of the fixing part, a lower fixing hole is provided at the center of the fixing boss, an upper fixing hole is provided at the center of the lower shell, the upper fixing hole is coaxially arranged with the lower fixing hole, and the lower end of the rotating shaft passes through the upper fixing hole and is inserted into the lower fixing hole;

[0012] The fixing portion is also provided with a plurality of heat dissipation holes, each of which is arranged at intervals along the circumferential direction and is located outside the fixing boss;

[0013] The motor is also provided with a PCB board, which is fixedly mounted on the lower part of the movement, the rotating shaft passes through the PCB board and is connected to the movement, and a heat dissipation gap is provided between the PCB board and the lower shell.

[0014] In a further technical solution, the outer edge of the lower air guide ring is tilted upward to form a lower air guide portion, and the lower portion of the lower air guide portion is provided with an arc-shaped lower air guide surface.

[0015] In a further technical solution, the lower part of the fan blade is formed on the inner side of the lower air guide part, the inner side of the upper part of the fan blade is integrally formed with the upper air guide part, and the outer side of the upper part of the fan blade extends upward to form an arc-shaped upper wind-guiding surface, and the upper wind-guiding surface has the same curvature as the first upper wind guide surface.

[0016] In a further technical solution, the tangent of the inner edge of the outer side surface of the fan blade is set as tangent L1, the line between the rotating axis of the wind wheel and the inner edge of the outer side surface of the fan blade is set as straight line L2, and the foot between the tangent L1 and the straight line L2 is set as the wind inlet angle α, and the wind inlet angle α is 30°~40°.

[0017] In a further technical solution, the distance H between the lower end surface of the lower air guide ring and the lower end surface of the upper air guide plate is 36-43 mm.

[0018] In a further technical solution, the outer edges of the wind blades are surrounded to form an outer circle D1, and the ratio of the outer diameter D2 of the lower air guide ring to the diameter of the outer circle D1 is 0.9-1.

[0019] After adopting the above structure, the advantages of the utility model compared with the prior art are: the lower shell and the rotating shaft are fixedly installed on the wind wheel, the movement is connected to the rotating shaft, thereby reducing assembly errors and improving coaxiality, and the dynamic balance is adjusted after the movement is connected to the rotating shaft, so that the dynamic balance of the wind wheel and the rotating shaft is kept consistent, reducing vibration and noise; there is a heat dissipation gap between the lower shell and the movement, and the heat inside the motor is conducted out through the heat dissipation gap, thereby improving the heat dissipation efficiency of the motor, preventing the motor from burning, and improving the operating stability of the motor and the purification capacity of the air purifier; by optimizing the structure of the wind wheel, air enters the wind wheel from the bottom and side of the wind wheel, and the air is guided to the second upper wind guide surface through the first upper wind guide surface, and the second upper wind guide surface guides the air to the air outlet, thereby reducing the airflow loss of the wind wheel, increasing the air intake, and improving the flow guidance performance of the wind wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is an exploded view of the utility model;

[0023] Figure 3 It is a cross-sectional view of the utility model;

[0024] Figure 4 This is a bottom view of the wind wheel of the utility model;

[0025] Figure 5 It is a cross-sectional view of the wind wheel of the utility model.

[0026] In the figure:

[0027] 1 mounting seat, 11 upper mounting groove, 12 second upper air guiding surface, 13 air guiding gap (13), 14 air outlet;

[0028] 2 wind wheel, 21 upper wind guide plate, 211 fixing part, 212 fixing boss, 213 lower fixing hole, 214 heat dissipation hole, 215 upper wind guide part, 216 first upper wind guide surface, 22 lower wind guide ring, 221 lower wind guide part, 222 lower wind guide surface, 23 fan blade, 231 upper wind guide surface, 232 tangent line, 233 connecting line, 24 connecting boss, 241 lower mounting groove;

[0029] 31 movement, 32 rotating shaft, 33 lower housing, 331 upper fixing hole, 34 PCB board, 35 heat dissipation gap. DETAILED DESCRIPTION

[0030] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

[0031] A driving device for an air purifier, such as Figures 1 to 3 As shown, it includes a mounting base 1, a wind wheel 2 and a motor. The mounting base 1 is provided with a plurality of air outlets 14 spaced apart along the circumferential direction, and an upper mounting groove 11 with an opening facing downward is provided at the lower portion of the mounting base 1; the wind wheel 2 includes an upper air guide plate 21, a lower air guide ring 22 and a plurality of fan blades 23 arranged between the upper air guide plate 21 and the lower air guide ring 22, and each fan blade 23 is arranged at equal intervals along the circumferential direction, and a connecting protrusion 24 is provided at the upper portion of the upper air guide plate 21, and the connecting protrusion 24 is provided with a lower mounting groove 241 with an opening facing upward, and the connecting protrusion 24 is located in the upper mounting groove 11; the motor includes a movement 31, a rotating shaft 32 and a lower shell 33 with an opening facing upward, the movement 31 is fixedly mounted on the upper portion of the upper mounting groove 11, the lower shell 33 is embedded in the lower mounting groove 241, the upper end portion of the rotating shaft 32 is connected to the movement 31, and the lower end portion of the rotating shaft 32 is connected to the central portion of the lower shell 33, and a heat dissipation gap 35 is provided between the lower shell 33 and the movement 31.

[0032] The motor of a conventional air purifier is closed inside. After the air enters the wind wheel 2, it is directly guided to the surroundings by the upper air guide plate 21 and does not blow toward the motor. When the motor is running for a long time or at high power, the temperature will rise. The motor will often automatically reduce the power, resulting in reduced air purification efficiency. In severe cases, the motor will be directly burned. In addition, the dynamic balance of the motor shaft 32 and the wind wheel 2 are independently adjusted. When the wind wheel 2 and the shaft 32 are assembled, a large error will occur, resulting in poor coaxiality. When the motor is running at high power, it will generate large noise and vibration. However, the lower shell 33 and the shaft 33 of the utility model are 2 is fixedly mounted on the wind wheel 2, and the movement 31 is connected to the rotating shaft 32, so as to reduce the assembly error and improve the coaxiality. After the movement 31 is connected to the rotating shaft 32, the dynamic balance is adjusted to keep the dynamic balance of the wind wheel 2 and the rotating shaft 32 consistent, thereby reducing vibration and noise. A heat dissipation gap 35 is provided between the lower housing 33 and the movement 31, and the heat inside the motor is conducted out through the heat dissipation gap 35, thereby improving the heat dissipation efficiency of the motor, preventing the motor from burning, and improving the running stability of the motor and the purification capacity of the air purifier. The driving device is fixed inside the air purifier through the mounting base 1, which is convenient for disassembly and assembly.

[0033] Specifically, the upper air guide plate 21 includes a circular fixing portion 211 and an annular upper air guide portion 215, the lower portion of the upper air guide portion 215 is formed at the outer edge of the fixing portion 211, the connecting protrusion 24 is a cylindrical connecting protrusion 24, the lower end of the connecting protrusion 24 is formed at the upper portion of the fixing portion 211, the diameter of the upper end of the upper air guide portion 215 is greater than the diameter of the lower end, and the lower portion of the upper air guide portion 215 is provided with an arc-shaped first upper air guide surface 216. The air is guided obliquely upward to the air outlet 14 by the first upper air guide surface 216, so as to prevent the air from directly hitting the plane and causing the air volume loss, thereby increasing the air volume.

[0034] Specifically, the outer edge of the upper mounting groove 11 is provided with an upwardly inclined arc-shaped second upper wind guide surface 12, the second upper wind guide surface 12 is located between the air outlet 14 and the upper mounting groove 11, and there is an air guide gap 13 between the first upper wind guide surface 216 and the second upper wind guide surface 12. Air enters the wind wheel 2 from the bottom and side of the wind wheel 2, and the air is guided to the second upper wind guide surface 12 through the first upper wind guide surface 216, and the second upper wind guide surface 12 guides the air to the air outlet 14, thereby reducing the airflow loss of the wind wheel, increasing the air intake, and improving the airflow performance of the wind wheel.

[0035] Specifically, the outer diameter of the upper air guide portion 215 is greater than the inner diameter of the upper mounting groove 11. After the air contacts the first upper air guide surface 216, it will be directly guided to the second upper air guide surface 12, preventing the air from entering the lower housing 33 from the air guide gap 13, so as to reduce the loss of air volume, and the heat generated by the operation of the motor is conducted from the heat dissipation gap 35 to the upper mounting groove 11. As the temperature rises, the pressure in the upper mounting groove 11 gradually increases, and the heat gradually overflows from the air guide gap 13 and is blown out with the air flow, so as to reduce the loss of air volume and improve the heat dissipation efficiency.

[0036] Specifically, a fixing boss 212 is provided at the center of the fixing portion 211, a lower fixing hole 213 is opened at the center of the fixing boss 212, an upper fixing hole 331 is opened at the center of the lower shell 33, the upper fixing hole 331 is coaxially arranged with the lower fixing hole 213, and the lower end of the rotating shaft 32 passes through the upper fixing hole 331 and is inserted into the lower fixing hole 213; the fixing portion 211 is also provided with a plurality of heat dissipation holes 214, each heat dissipation hole 214 is arranged at intervals in the circumferential direction and is located on the outside of the fixing boss 212; the motor is also provided with a PCB board 34, the PCB board 34 is fixedly installed at the lower part of the movement 31, the rotating shaft 32 passes through the PCB board 34 and is connected to the movement 31, and a heat dissipation gap 35 is provided between the PCB board 34 and the lower shell 33. The wind wheel 2, the rotating shaft 32 and the lower shell 33 are made by the sleeve beer process. The length of the lower fixing hole 213 can be deepened by the fixing boss 212, thereby increasing the contact area between the upper fixing hole 331 and the rotating shaft 32 and improving the tightness; the heat dissipation effect can be further improved by the heat dissipation hole 214.

[0037] Specifically, the outer edge of the lower air guide ring 22 is tilted upward to form a lower air guide portion 221, and an arc-shaped lower air guide surface 222 is provided at the lower part of the lower air guide portion 221. When the wind wheel 2 rotates, the air below the wind wheel is sucked into the wind wheel 2 from the bottom, and the air that does not enter the wind wheel 2 flows obliquely upward under the guidance of the lower air guide surface 222, thereby increasing the air flow speed and the air intake volume.

[0038] Specifically, the lower part of the fan blade 23 is formed on the inner side of the lower air guide portion 221, the inner side of the upper part of the fan blade 23 is integrally formed with the upper air guide portion 215, and the outer side of the upper part of the fan blade 23 extends upward to form an arc-shaped upper air guide surface 231, and the upper air guide surface 231 has the same curvature as the first upper air guide surface 216. The outer side of the upper part of the fan blade 23 extends upward to increase the height of the fan blade 23 to increase the air intake, and the upper air guide surface 231 has the same curvature as the first upper air guide surface 216, which extends the length of the air guide gap 13, reduces the distance between the air guide gap 13 and the air outlet 14, improves the airflow efficiency, and reduces the air volume loss.

[0039] Specifically, Figure 4 As shown, the tangent 232 of the inner edge of the outer side surface of the fan blade 23 is set as the tangent L1, the connecting line 233 between the rotating shaft 32 of the wind wheel 2 and the inner edge of the outer side surface of the fan blade 23 is set as the straight line L2, and the foot between the tangent L1 and the straight line L2 is set as the wind inlet angle α, and the wind inlet angle α is 30° to 40°. Preferably, the wind inlet angle α is 35° to 39°. By optimizing the wind inlet angle α, the wind inlet volume is increased while reducing wind noise.

[0040] Specifically, Figure 5 As shown, the distance H between the lower end surface of the lower air guide ring 22 and the lower end surface of the upper air guide plate 21 is 36-43 mm. Preferably, the distance H is 39-40 mm. By optimizing the distance between the lower air guide ring 22 and the upper air guide plate 21, the length of the fan blade 23 is adjusted to balance the rotation resistance of the wind wheel 2 and the air intake.

[0041] Specifically, Figure 4 As shown, the outer edges of the blades 23 form an outer circle D1, and the ratio of the outer diameter D2 of the lower air guide ring 22 to the diameter of the outer circle D1 is 0.9 to 1. Preferably, the ratio of the outer diameter D2 to the diameter of the outer circle D1 is 0.92 to 0.96.

[0042] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A driving device for an air purifier, characterized in that: The invention comprises a mounting seat (1), a wind wheel (2) and a motor, wherein the mounting seat (1) is provided with a plurality of air outlets (14) spaced apart in a circumferential direction, and an upper mounting groove (11) with an opening facing downward is provided at the lower part of the mounting seat (1); The wind wheel (2) comprises an upper wind guide plate (21), a lower wind guide ring (22), and a plurality of wind blades (23) arranged between the upper wind guide plate (21) and the lower wind guide ring (22), wherein the wind blades (23) are arranged at equal intervals along the circumferential direction, a connecting protrusion (24) is arranged on the upper part of the upper wind guide plate (21), the connecting protrusion (24) is provided with a lower mounting groove (241) with an opening facing upward, and the connecting protrusion (24) is located in the upper mounting groove (11); The motor comprises a movement (31), a rotating shaft (32) and a lower housing (33) with an opening facing upwards. The movement (31) is fixedly mounted on the upper part of the upper mounting groove (11), the lower housing (33) is embedded in the lower mounting groove (241), the upper end of the rotating shaft (32) is connected to the movement (31), the lower end of the rotating shaft (32) is connected to the center of the lower housing (33), and a heat dissipation gap (35) is provided between the lower housing (33) and the movement (31).

2. A driving device for an air purifier according to claim 1, characterized in that: The upper air guide plate (21) comprises a circular fixing portion (211) and an annular upper air guide portion (215); the lower portion of the upper air guide portion (215) is formed on the outer edge of the fixing portion (211); the connecting protrusion (24) is a cylindrical connecting protrusion (24); the lower end portion of the connecting protrusion (24) is formed on the upper portion of the fixing portion (211); the diameter of the upper end portion of the upper air guide portion (215) is greater than the diameter of the lower end portion; and the lower portion of the upper air guide portion (215) is provided with an arc-shaped first upper air guide surface (216).

3. A driving device for an air purifier according to claim 2, characterized in that: The outer edge of the upper mounting groove (11) is provided with an upwardly inclined arc-shaped second upper wind guide surface (12); the second upper wind guide surface (12) is located between the air outlet (14) and the upper mounting groove (11); and an air guide gap (13) is provided between the first upper wind guide surface (216) and the second upper wind guide surface (12).

4. A driving device for an air purifier according to claim 3, characterized in that: The outer diameter of the upper air guide portion (215) is greater than the inner diameter of the upper mounting groove (11).

5. A driving device for an air purifier according to claim 2, characterized in that: The fixing portion (211) is provided with a fixing boss (212) at its center, the fixing boss (212) is provided with a lower fixing hole (213) at its center, the lower shell (33) is provided with an upper fixing hole (331) at its center, the upper fixing hole (331) and the lower fixing hole (213) are coaxially arranged, and the lower end of the rotating shaft (32) passes through the upper fixing hole (331) and is inserted into the lower fixing hole (213); The fixing portion (211) is also provided with a plurality of heat dissipation holes (214), each heat dissipation hole (214) being arranged at intervals along the circumferential direction and located outside the fixing boss (212); The motor is also provided with a PCB board (34), the PCB board (34) is fixedly mounted on the lower part of the movement (31), the rotating shaft (32) passes through the PCB board (34) and is connected to the movement (31), and a heat dissipation gap (35) is provided between the PCB board (34) and the lower housing (33).

6. A driving device for an air purifier according to claim 2, characterized in that: The outer edge of the lower air guide ring (22) is tilted upward to form a lower air guide portion (221), and an arc-shaped lower air guide surface (222) is provided at the lower portion of the lower air guide portion (221).

7. A driving device for an air purifier according to claim 6, characterized in that: The lower portion of the fan blade (23) is formed on the inner side surface of the lower air guide portion (221), the inner side of the upper portion of the fan blade (23) is integrally formed with the upper air guide portion (215), and the outer side of the upper portion of the fan blade (23) extends upward to form an arc-shaped upper air guide surface (231), and the upper air guide surface (231) has the same curvature as the first upper air guide surface (216).

8. A driving device for an air purifier according to any one of claims 1 to 7, characterized in that: The tangent line (232) of the inner edge of the outer side surface of the fan blade (23) is set as the tangent line L1, the connecting line (233) between the rotating shaft (32) of the fan wheel (2) and the inner edge of the outer side surface of the fan blade (23) is set as the straight line L2, and the foot between the tangent line L1 and the straight line L2 is set as the wind inlet angle α, and the wind inlet angle α is 30° to 40°.

9. A driving device for an air purifier according to claim 8, characterized in that: The distance H between the lower end surface of the lower air guide ring (22) and the lower end surface of the upper air guide plate (21) is 36 to 43 mm.

10. A driving device for an air purifier according to claim 8, characterized in that: The outer edges of the wind blades (23) are surrounded to form an outer circle D1, and the ratio of the outer diameter D2 of the lower air guide ring (22) to the diameter of the outer circle D1 is 0.9-1.

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