High-speed direct-current brushless air duct motor convenient to assemble

Abstract

The utility model discloses a high-speed direct-current brushless air duct motor convenient to assemble, which relates to the technical field of air duct motors and comprises a shell, a driving unit arranged in the shell and a rotating unit arranged on one side of the driving unit. The driving unit comprises external connection assemblies arranged on the two sides of the shell and a magnetic circuit assembly arranged in the shell. The rotating unit comprises a rotating shaft arranged on one side of the magnetic circuit assembly, a plurality of blades fixedly connected to the side face of the rotating shaft, and a row of blowing holes formed in the top ends of the blades. According to the high-speed direct-current brushless air duct motor convenient to assemble, the internal layout of the stator chip is optimized, the effective utilization rate of magnetic energy is improved, the cogging torque is reduced by combining a plurality of arc-shaped plates, the thickness of the blades adopts a three-section design, the uniformity of the blades at different radiuses is optimized, and the service life of the blades is prolonged. The pneumatic loss is reduced while the weight of the blade is reduced, and the wind power conversion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryer motors, and particularly relates to a high-speed DC brushless hair dryer motor which is convenient to assemble. Background Art

[0002] A hair dryer is a relatively common household motor in life. It uses an internal motor to drive the fan blade to rotate, so as to make local ventilation and guide the air to a designated outlet for discharge, meeting people's usage requirements. The motor is the most important power component of the hair dryer.

[0003] After retrieval, the publication (announcement) number: CN213585528U discloses a high-speed brushless DC motor for a hair dryer, which includes an outer sleeve, a housing, a rotating shaft, a fan blade, a magnet, a stator core, a stator winding, a front wire frame, a rear wire frame, a circuit board and a wire plug. The rotating shaft is rotatably installed inside the housing, and a magnet is fixedly installed on the outer peripheral side of the middle of the rotating shaft. The front wire frame and the rear wire frame are respectively inserted into the front and rear sides of the stator core, and the stator winding is wound around the front wire frame and the rear wire frame. The stator winding is divided into three phases of U, V, and W, and the phase difference between each phase is 120° and is connected in a star shape. A guide pin is provided behind the rear wire frame, and a circuit board is installed at the tail of the guide pin. The circuit board is provided with conductive end points corresponding to the three phases of U, V, and W. When the high-speed brushless DC motor for the hair dryer of the utility model starts, two of the three-phase windings of the stator winding are energized, that is, only two windings are energized simultaneously each time and are energized and de-energized in sequence, and the motor directly starts the rotating shaft to rotate, having the advantages of reliable operation, high efficiency, fast speed, and no dead point at startup.

[0004] Although the above scheme has the advantages of reliable operation, high efficiency, fast speed, and no dead point at startup, the design of the magnetic circuit can be further optimized to achieve better results. At the same time, the aerodynamic loss can be reduced by improving the blades. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a high-speed DC brushless hair dryer motor which is convenient to assemble. By setting a driving unit, the problem that the design of the magnetic circuit can be further optimized to achieve better results is solved. By setting a rotating unit, the aerodynamic loss is reduced by improving the blades.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-speed DC brushless hair dryer motor which is convenient to assemble includes a housing, and further includes a driving unit arranged inside the housing and a rotating unit arranged on one side of the driving unit;

[0008] The driving unit includes an external connection component arranged on both sides of the housing and a magnetic circuit component arranged inside the housing;

[0009] The rotating unit includes a rotating shaft disposed on one side of the magnetic circuit assembly, a plurality of blades fixedly connected to the side surface of the rotating shaft, and a row of air blowing holes opened at the top end of the blades.

[0010] Preferably, the external components in the driving unit include a rear wire frame inserted and arranged on the back surface of the housing, a front wire frame inserted and arranged on the front surface of the housing, and an interface arranged on the front surface of the front wire frame.

[0011] Preferably, the magnetic circuit assembly in the driving unit includes a stator chip arranged inside the housing, a plurality of iron sheets fixedly connected to the inner wall of the stator chip, an arc-shaped plate fixedly connected to one end of the plurality of iron sheets, a V-shaped magnetic isolation groove opened between adjacent two iron sheets, and a stator winding arranged in the corresponding magnetic isolation groove;

[0012] The plurality of stator windings are connected in star, and the phase difference between the plurality of stator windings is 60°.

[0013] Preferably, the distance between adjacent two arc-shaped plates in the driving unit is the same, and the extension lines at both ends of the arc-shaped plate intersect with the center point of the stator chip.

[0014] Preferably, the blades in the rotating unit further include an air blowing cavity opened inside the blades and communicated with the plurality of air blowing holes.

[0015] Preferably, the heights on both sides and in the middle of the blades in the rotating unit are different, the height in the middle of the blades is greater than the height on the left side, and the height on the left side is greater than the height on the right side;

[0016] The inlet geometric angle of the blade is 25.5°, and the outlet geometric angle is -20.5°.

[0017] Preferably, the material of the blades in the rotating unit is aluminum metal.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] First, in the utility model, through the arrangement of the driving unit, the stator chip, the plurality of iron sheets and the arc-shaped plate limit the magnetic isolation groove into a V shape, and the bottom end of the magnetic isolation groove is open, so that the magnetic flux leakage amount is reduced, and the plurality of stator windings are connected in star, and the phase difference between the plurality of stator windings is 60°, so that the internal layout of the stator chip is optimized, the effective utilization rate of magnetic energy is improved, and the cogging torque is reduced by combining the plurality of arc-shaped plates, and the vibration and noise caused by magnetic field non-uniformity are reduced, and the running stability of the motor is improved.

[0020] Second, in the present utility model, through the setting of the rotating unit, since the upper surface of the blade is the suction surface and the lower surface is the pressure surface, and a blowing cavity is provided inside the blade, the blowing cavity is located between the suction surface and the pressure surface of the blade, and the thickness design of the blade adopts a three-stage design, optimizing the uniformity of the blade at different radii. A blowing cavity is provided inside the blade, and at the same time, the material of the blade is aluminum metal, reducing the blade weight while reducing the aerodynamic loss, improving the wind power conversion efficiency, and at the same time reducing the vibration at high speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 2 is a sectional view of the present utility model;

[0023] Figure 3 is a sectional view of the stator chip in the present utility model;

[0024] Figure 4 is a sectional view of the housing in the present utility model;

[0025] Figure 5 is a front view of the blade in the present utility model.

[0026] In the figure:

[0027] 1. Housing;

[0028] 2. Driving unit; 201. Rear wire frame; 202. Front wire frame; 203. Interface; 204. Stator chip; 205. Stator winding; 206. Iron sheet; 207. Arc plate; 208. Magnetic isolation groove;

[0029] 3. Rotating unit; 301. Rotating shaft; 302. Blade; 303. Blowing hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments. Embodiment 1

[0031] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, a high-speed DC brushless hair dryer motor that is easy to assemble includes a housing 1, and further includes a driving unit 2 disposed inside the housing 1, and a rotating unit 3 disposed on one side of the driving unit 2;

[0032] The driving unit 2 includes external components disposed on both sides of the housing 1 and a magnetic circuit component disposed inside the housing 1;

[0033] The rotating unit 3 includes a rotating shaft 301 disposed on one side of the magnetic circuit component, a plurality of blades 302 fixedly connected to the side surface of the rotating shaft 301, and a row of air blowing holes 303 opened at the top end of the blades 302.

[0034] The external components in the driving unit 2 include a rear wire frame 201 inserted and disposed on the back surface of the housing 1, a front wire frame 202 inserted and disposed on the front surface of the housing 1, and an interface 203 disposed on the front surface of the front wire frame 202.

[0035] The magnetic circuit component in the driving unit 2 includes a stator chip 204 disposed inside the housing 1, a plurality of iron sheets 206 fixedly connected to the inner wall of the stator chip 204, an arc-shaped plate 207 fixedly connected to one end of the plurality of iron sheets 206, a V-shaped magnetic isolation groove opened between adjacent two iron sheets 206, and a stator winding 205 disposed in the corresponding magnetic isolation groove;

[0036] The plurality of stator windings 205 are connected in star, and the phase difference between the plurality of stator windings 205 is 60°.

[0037] The distance between adjacent two arc-shaped plates 207 in the driving unit 2 is the same, and the extension lines at both ends of the arc-shaped plate 207 intersect with the center point of the stator chip 204.

[0038] The blade 302 in the rotating unit 3 further includes an air blowing cavity opened inside the blade 302 and communicated with the plurality of air blowing holes 303.

[0039] The heights on both sides and in the middle of the blade 302 in the rotating unit 3 are different. The height in the middle of the blade 302 is greater than the left height, and the left height is greater than the right height;

[0040] The inlet geometric angle of the blade 302 is 25.5°, and the outlet geometric angle is -20.5°.

[0041] The material of the blade 302 in the rotating unit 3 is aluminum metal.

[0042] The arrangement of the stator chip 204, the plurality of iron sheets 206 and the arc-shaped plate 207 restricts the magnetic isolation groove into a V shape, and the bottom end of the magnetic isolation groove is open, which reduces the magnetic flux leakage. And the plurality of stator windings 205 are connected in star, and the phase difference between the plurality of stator windings 205 is 60°, which optimizes the internal layout of the stator chip 204, improves the effective utilization rate of magnetic energy, and combines with the plurality of arc-shaped plates 207 to reduce the cogging torque, reduce the vibration and noise caused by magnetic field non-uniformity, and improve the running stability of the motor. Embodiment 2

[0043] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , a high-speed DC brushless hair dryer motor that is easy to assemble includes a housing 1, and also includes a driving unit 2 disposed inside the housing 1, and a rotating unit 3 disposed on one side of the driving unit 2;

[0044] The driving unit 2 includes external connection components disposed on both sides of the housing 1, and a magnetic circuit component disposed inside the housing 1;

[0045] The rotating unit 3 includes a rotating shaft 301 disposed on one side of the magnetic circuit component, a plurality of blades 302 fixedly connected to the side surface of the rotating shaft 301, and a row of air blowing holes 303 opened at the top end of the blades 302.

[0046] The external connection components in the driving unit 2 include a rear wire holder 201 inserted into the back surface of the housing 1, a front wire holder 202 inserted into the front surface of the housing 1, and an interface 203 disposed on the front surface of the front wire holder 202.

[0047] The magnetic circuit component in the driving unit 2 includes a stator chip 204 disposed inside the housing 1, a plurality of iron sheets 206 fixedly connected to the inner wall of the stator chip 204, an arc-shaped plate 207 fixedly connected to one end of the plurality of iron sheets 206, a V-shaped magnetic isolation groove opened between adjacent two iron sheets 206, and a stator winding 205 disposed in the corresponding magnetic isolation groove;

[0048] The plurality of stator windings 205 are star-connected, and the phase difference between the plurality of stator windings 205 is 60°.

[0049] The distance between adjacent two arc-shaped plates 207 in the driving unit 2 is the same, and the extension lines of both ends of the arc-shaped plate 207 intersect with the center point of the stator chip 204.

[0050] The blade 302 in the rotating unit 3 further includes an air blowing cavity opened inside the blade 302 and communicating with the plurality of air blowing holes 303.

[0051] The heights of both sides and the middle of the blade 302 in the rotating unit 3 are different. The height of the middle of the blade 302 is greater than the left height, and the left height is greater than the right height;

[0052] The inlet geometric angle of the blade 302 is 25.5°, and the outlet geometric angle is -20.5°.

[0053] The material of the blade 302 in the rotating unit 3 is aluminum metal.

[0054] Since the upper surface of the blade 302 is the suction surface, the lower surface is the pressure surface, and a blowing cavity is provided inside the blade 302. The blowing cavity is located between the suction surface and the pressure surface of the blade 302. The thickness design of the blade 302 adopts a three-stage design, which optimizes the uniformity of the blade 302 at different radii. A blowing cavity is provided inside the blade 302. At the same time, the material of the blade 302 is aluminum metal, which reduces the weight of the blade 302 while reducing the aerodynamic loss, improves the wind power conversion efficiency, and reduces the vibration at high speeds.

[0055] The foregoing shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed brushless DC blower motor that is easy to assemble, comprising a housing (1), characterized in that: It also includes a driving unit (2) arranged inside the housing (1), and a rotating unit (3) arranged on one side of the driving unit (2); The drive unit (2) comprises external components arranged on both sides of the housing (1), and a magnetic circuit component arranged inside the housing (1); The rotating unit (3) comprises a rotating shaft (301) arranged on one side of the magnetic circuit assembly, a plurality of blades (302) fixedly connected to the side of the rotating shaft (301), and a row of blowing holes (303) opened at the top of the blades (302).

2. The high-speed brushless DC blower motor that is easy to assemble according to claim 1 is characterized in that: The external components in the drive unit (2) include a rear wire frame (201) plugged into the back of the shell (1), a front wire frame (202) plugged into the front of the shell (1), and an interface (203) disposed on the front of the front wire frame (202).

3. The high-speed DC brushless blower motor that is easy to assemble according to claim 2 is characterized in that: The magnetic circuit assembly in the drive unit (2) comprises a stator core (204) arranged inside the housing (1), a plurality of iron sheets (206) fixedly connected to the inner wall of the stator core (204), an arc-shaped plate (207) fixedly connected to one end of the plurality of iron sheets (206), a V-shaped magnetic isolation groove provided between two adjacent iron sheets (206), and a stator winding (205) arranged in the corresponding magnetic isolation groove; The multiple stator windings (205) are star-connected, and the phase difference between the multiple stator windings (205) is 60°.

4. The high-speed brushless DC blower motor that is easy to assemble according to claim 3 is characterized in that: The distance between two adjacent arc-shaped plates (207) in the drive unit (2) is the same, and the extended lines at both ends of the arc-shaped plates (207) intersect with the round points of the stator core (204).

5. The high-speed DC brushless blower motor that is easy to assemble according to claim 4 is characterized in that: The blade (302) in the rotating unit (3) further comprises an air blowing cavity which is opened inside the blade (302) and communicates with the plurality of air blowing holes (303).

6. The high-speed brushless DC blower motor that is easy to assemble according to claim 5, characterized in that: The heights of the two sides and the middle of the blade (302) in the rotating unit (3) are different; the height of the middle of the blade (302) is greater than the height of the left side, and the height of the left side is greater than the height of the right side.

7. The high-speed brushless DC blower motor that is easy to assemble according to claim 6, characterized in that: The material of the blades (302) in the rotating unit (3) is metal aluminum.

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