Fan motor capable of efficiently discharging air

Abstract

The utility model discloses an efficient air-out fan motor, which comprises a ducted casing, an end cover and a fan blade, the main body of the fan blade is a half-water-drop-shaped rotating body, the plane curve of the fan blade is a parabola of which the top is cut off, the fluid resistance is reduced during working, meanwhile, a guiding function is provided for fluid, the impact of the fluid and the blade is reduced, the efficiency of the fan blade is improved, and the service life of the fan blade is prolonged. The fan blade noise is improved; the ducted machine shell comprises an inner shell and an outer shell which are arranged on the same center shaft, at least one static blade is arranged in an annular channel between the inner shell and the outer shell, the static blades are connected with the inner shell and the outer shell, and the static blades are tangent to the center shaft in the same direction at the air outlet end. And the cross section of the static blade at the air inlet end part is arranged along the radial direction of the inner shell and the outer shell. The air outlet structure has the beneficial effects that the air outlet gathering effect is good, the air noise is small, the air outlet efficiency is high, the production and manufacturing cost is reduced, and the automatic production is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of fan motors, in particular to a fan motor with high efficient air outlet. Background Art

[0002] Traditional hair dryers often use brushed motors, while brushless motors are motors that do not require brushes to touch the commutator to achieve current conversion. A brushless motor consists of two parts: a motor body and a drive circuit. The motor body includes a stator and a rotor. The stator is wound with coils, and the rotor is composed of permanent magnets. The drive circuit controls the frequency and phase of the current to make the motor rotate. Fan motors are widely used, especially in household appliances such as vacuum cleaners and hair dryers. In order to obtain stronger wind force and wind speed, the rotational speed of the rotor is continuously increased, which brings problems such as high wind noise, poor wind gathering effect, and low air outlet efficiency commonly existing in high-speed fan motors. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a fan motor with high efficient air outlet, which solves the technical problems of high wind noise, poor wind gathering effect, and low air outlet efficiency existing in high-speed fan motors in the prior art.

[0004] The utility model realizes the above purpose through the following technical solutions: A fan motor with high efficient air outlet includes a duct housing and an end cover. The duct housing includes an inner shell and an outer shell arranged concentrically. At least one static blade is arranged in the annular channel between the inner shell and the outer shell. The static blade connects the inner shell and the outer shell, and the static blade is tangent to the central axis in the same direction at the air outlet end. The end cover is in interference fit or adhesively fixed with the duct housing.

[0005] Preferably, it further includes a wind blade. The wind blade includes a wind blade body and wind blade segments. The wind blade body is a semi-drop-shaped rotating body. The plane curve corresponding to the semi-drop-shaped rotating body is a parabola with the top removed. The wind blade body has a large cross-section end and a small cross-section end. When the wind blade is assembled with the duct housing, the small cross-section end faces outward.

[0006] Preferably, it further includes a stator assembly. The stator assembly is installed in the inner shell of the duct housing. The stator assembly includes windings and pins. The wire heads and wire tails of the windings are connected to the pins.

[0007] Preferably, the pins are connected to the PCBA through the through holes on the end cover.

[0008] Preferably, it further includes a rotor assembly and bearings. The rotor assembly includes a rotating shaft and a rotor. The rotor assembly is assembled in the stator assembly.

[0009] Preferably, a second bearing chamber is provided in the end cap.

[0010] Preferably, a first bearing chamber is provided in the inner shell of the duct housing.

[0011] Preferably, the end of the inner shell at the air outlet end of the duct housing is lower than the end of the outer shell, forming a blade cavity.

[0012] Preferably, the cross-section of the stationary blade at the air inlet end is arranged along the radial direction of the inner shell and the outer shell of the duct housing.

[0013] Preferably, the end cap has a plurality of through holes, including a through hole for the insertion pin to pass through and a heat dissipation hole for the motor to dissipate heat.

[0014] Compared with the prior art, the beneficial effects obtained by the present utility model are as follows:

[0015] A blower motor with efficient air outlet disclosed by the present utility model includes a duct housing, an end cap, and a blade. The main body of the blade is a semi-droplet-shaped rotating body, and its planar curve is a parabola with the top removed. During operation, it reduces fluid resistance, gives a guiding effect to the fluid, reduces the impact between the fluid and the blade, increases the efficiency of the blade, and improves the blade noise. The duct housing includes an inner shell and an outer shell arranged on the same central axis. At least one stationary blade is arranged in the annular channel between the inner shell and the outer shell. The stationary blade connects the inner shell and the outer shell. The air outlet end of the stationary blade is tangent to the central axis in the same direction. The cross-section of the stationary blade at the air inlet end is arranged along the radial direction of the inner shell and the outer shell. Through the guiding action of the stationary blade, the fluid direction is ensured to be the same as the axial direction when the fluid flows out of the duct, achieving the effect of aggregating the fluid, and the air inlet area is large enough to ensure the maximum air intake. The end cap is in interference fit or adhesively fixed with the duct housing, reducing screw fixation and its process, reducing material costs and labor costs. At the same time, reducing screw fixation can optimize the structure, reduce the eddy current loss generated when the screw passes through the stator core, and increase the motor efficiency. It also includes a stator assembly and a PCBA. The stator assembly has multiple insertion pins and is connected to the PCBA through the insertion pins, improving the process, reducing the manufacturing cost, facilitating automated production, solving the technical problems of high wind noise, poor air aggregation effect, and low air outlet efficiency existing in the prior art of high-speed blowers, and having the beneficial effects of good air outlet aggregation effect, low wind noise, high air outlet efficiency, reduced production and manufacturing costs, and facilitating automated production. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0017] Figure 1Shows a cross-sectional view of a fan motor with efficient air outlet of the present utility model.

[0018] Figure 2 Shows a bottom view of the end cover of a fan motor with efficient air outlet of the present utility model.

[0019] Figure 3 Shows a schematic diagram of the impeller of a fan motor with efficient air outlet of the present utility model.

[0020] Reference numerals: 1 - duct housing; 11 - inner housing; 111 - first bearing chamber; 12 - outer housing; 13 - static blade; 131 - air outlet end; 132 - air inlet end; 2 - end cover; 21 - through hole; 22 - second bearing chamber; 3 - impeller; 31 - impeller body; 311 - large cross-section end; 312 - small cross-section end; 32 - impeller blade; 4 - stator assembly; 41 - winding; 42 - pin; 5 - PCBA; 6 - rotor assembly; 61 - rotating shaft; 62 - rotor. Detailed implementation manners

[0021] The following further illustrates the present utility model in conjunction with the accompanying drawings of the specification and specific embodiments. However, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to the attached Figure 1 to the attached Figure 3A fan motor with high efficiency in air discharge comprises a duct housing 1, an end cover 2, a fan blade 3, a stator assembly 4, a PCBA 5, a rotor assembly 6, and a bearing 7. The duct housing 1 comprises an inner housing 11 and an outer housing 12 arranged with the same central axis. At least one stationary blade 13 is arranged in an annular channel between the inner housing 11 and the outer housing 12. The stationary blade 13 is tangential to the central axis along the same direction at an air outlet end 131. The stationary blade 13 connects the inner housing 11 and the outer housing 12. The cross section of the stationary blade 13 at the air inlet end 132 is arranged along the radial direction of the inner housing 11 and the outer housing 12 of the duct housing 1, thereby ensuring the maximum air inlet volume. At the same time, the fluid is gathered at the air outlet end, thereby improving the air discharge efficiency. rate; the inner shell end at the air outlet end of the duct casing 1 is lower than the outer shell end, forming a blade cavity for accommodating the blade 3, the blade 3 includes a blade body 31 and a blade 32, the blade body 31 is a semi-tear drop-shaped rotating body, the plane curve corresponding to the semi-tear drop-shaped rotating body is a parabola with the top cut off, the blade body 31 has a large-section end 311 and a small-section end 312, when the blade 3 is assembled with the duct casing 1, the small-section end 312 faces outward, and the semi-tear drop-shaped rotating body design reduces the fluid resistance during operation, guides the fluid to reduce the impact on the blade 32, increases the working efficiency of the blade 3, and reduces the noise of the blade 3.

[0023] The stator assembly 4 is installed in the inner shell 11 of the ducted casing 1. The stator assembly 4 includes a winding 41 and a pin 42. The wire ends and wire tails of the winding 41 are connected to the pin 42. The end cover 2 is interference fit or adhesively fixed to the ducted casing 1, which reduces the cumbersome process caused by screw assembly and the eddy current loss generated when the screws pass through the stator core, thereby increasing the motor efficiency.

[0024] The end cover 2 has a plurality of through holes 21, and the through holes 21 include through holes for the pins 42 to pass through and heat dissipation holes for the motor. The pins 42 are connected to the PCBA5 through the through holes 21 on the end cover 2, which simplifies the production process and reduces the production cost. The rotor assembly 6 includes a rotating shaft 61 and a rotor 62. The rotor assembly 6 is assembled in the stator assembly 4. A first bearing chamber 111 is provided in the inner shell 11 of the ducted casing 1. A second bearing chamber 22 is provided in the end cover 2 for accommodating the rotating shaft 7. The bearing 7 includes a first bearing and a second bearing, which are respectively provided at both ends of the stator assembly 4.

[0025] The above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many similar modifications. All modifications that can be directly derived or associated with the contents disclosed by ordinary technicians in this field should be considered as the scope of protection of the present invention.

Claims

1. A fan motor with high efficiency of air output, characterized in that: The invention comprises a duct casing (1) and an end cover (2), wherein the duct casing (1) comprises an inner casing (11) and an outer casing (12) which are arranged coaxially with a central axis, at least one stationary blade (13) is arranged in an annular channel between the inner casing (11) and the outer casing (12), and the stationary blade (13) is tangent to the central axis in the same direction at an air outlet end (131), and the end cover (2) is fixed to the duct casing (1) by interference fit or bonding.

2. The high-efficiency air-discharging fan motor according to claim 1, characterized in that: The fan blade (3) further comprises a fan blade (3), wherein the fan blade (3) comprises a fan blade body (31) and a fan blade (32), the fan blade body (31) being a semi-water drop-shaped rotating body, the plane curve corresponding to the semi-water drop-shaped rotating body being a parabola with the top cut off, the fan blade body (31) having a large cross-section end (311) and a small cross-section end (312), and when the fan blade (3) is assembled with the duct casing (1), the small cross-section end (312) faces outwards.

3. The high-efficiency air-discharging fan motor according to claim 1, characterized in that: It also includes a stator assembly (4), the stator assembly (4) being installed in the inner shell (11) of the duct housing (1), the stator assembly (4) including a winding (41) and a pin (42), the wire head and wire tail of the winding (41) being connected to the pin (42).

4. The high-efficiency air-discharging fan motor according to claim 3, characterized in that: The plug pin (42) is connected to the PCBA (5) via the through hole (21) on the end cover (2).

5. The high-efficiency air-discharging fan motor according to claim 4, characterized in that: It also includes a rotor assembly (6) and a bearing (7), wherein the rotor assembly (6) includes a rotating shaft (61) and a rotor (62), and the rotor assembly (6) is assembled in the stator assembly (4).

6. The high-efficiency air-discharging fan motor according to claim 1, characterized in that: A second bearing chamber (22) is provided in the end cover (2).

7. The high-efficiency air-discharging fan motor according to claim 1, characterized in that: A first bearing chamber (111) is provided in the inner casing (11) of the ducted casing (1).

8. The high-efficiency air-discharging fan motor according to claim 1, characterized in that: The inner shell end portion at the air outlet end of the duct casing (1) is lower than the outer shell end portion, forming a fan blade cavity.

9. The high-efficiency air-discharging fan motor according to claim 1, characterized in that: The stationary blades (13) connect the inner casing (11) and the outer casing (12); the cross section of the stationary blades (13) at the air inlet end (132) is arranged along the radial direction of the inner casing (11) and the outer casing (12) of the duct casing (1).

10. The high-efficiency air-discharging fan motor according to claim 1, characterized in that: The end cover (2) has a plurality of through holes (21), wherein the through holes (21) include through holes for pins to pass through and heat dissipation holes for heat dissipation of the motor.

Images