Cooling fan with separated frame and leaf

Abstract

The utility model discloses a cooling fan with separated frame blades, which belongs to the technical field of cooling fans and comprises a motor, and the motor comprises a stator winding and a magnetic ring. One end of the fan shaft is fixedly connected with the magnetic ring and inserted into the center of the stator winding, and the other end of the fan shaft is fixedly connected with fan blades coaxial with the fan shaft; the fan blades comprise a hub which is not coated with the stator winding, outer blades which are annularly arranged on the periphery of the hub, and inner blades which are annularly arranged on the inner periphery of the hub; and the fan frame comprises an inner frame, a stator winding is installed in the inner frame, one end of the inner frame is open, and the opening is opposite to the position of the inner blade. The height of the hub is shortened, the magnetic ring is arranged inside, the internal structure of the fan is exposed, heat is naturally discharged, the number of the blades is increased, and the influence of fan loss is eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat dissipation fans, and in particular relates to a heat dissipation fan with separated frames and blades. Background Art

[0002] The existing cooling fan includes a fan bottom frame A, a motor B and a fan blade C, wherein the fan blade includes a hub c1 and a blade c2, and the blade generally has 5 blades. The motor includes a stator winding b1 and a magnetic ring b2. The stator winding is fixed on the fan bottom frame, and the magnetic ring is fixed on the inner side of the impeller hub. The hub not only serves as a carrier of the magnetic ring, but also completely covers the motor. Figure 1 shown.

[0003] Since there is a fan bottom frame at the bottom of the motor and the parts other than the bottom are covered by the hub, the heat inside the motor cannot be discharged and accumulates inside the hub. The high temperature affects the performance of the fan and reduces the service life of the fan. Utility Model Content

[0004] The utility model provides a cooling fan with separated frame and blades, which is used to solve the problem of high temperature accumulation inside the current cooling fan.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a cooling fan with separated frame and blades, comprising a motor, wherein the motor comprises a stator winding and a magnetic ring;

[0006] A fan shaft, one end of which is fixedly connected to a magnetic ring and inserted into the center of the stator winding, and the other end of which is fixedly connected to a coaxial fan blade;

[0007] The fan blades include a hub not covered with a stator winding, outer blades arranged around the outer circumference of the hub, and inner blades arranged around the inner circumference of the hub;

[0008] And a fan frame, the fan frame comprises an inner frame, a stator winding is installed in the inner frame, one end of the inner frame is open, and the opening is opposite to the position of the inner blade.

[0009] Specifically, a copper sleeve is provided between the stator winding and the fan shaft, the copper sleeve is relatively fixed to the stator winding, and the copper sleeve is rotatably connected to the fan shaft via a bearing.

[0010] Specifically, there are two bearings, and the magnetic ring is located between the two bearings.

[0011] Specifically, one end of the inner frame facing away from the opening is a bottom frame, and the edge of the bottom frame is extended toward the direction of the opening to form a side frame surrounding the stator winding.

[0012] Specifically, both ends of the copper sleeve are transparent and penetrate the bottom frame.

[0013] Specifically, the inner blades have opposite rotation directions to the outer blades.

[0014] Specifically, there are 9 outer blades in total.

[0015] Specifically, there are 5 inner blades in total.

[0016] Specifically, the fan frame also includes an outer frame which is sleeved outside the inner frame and is transparent at both ends, and a plurality of stationary blades are arranged between the outer frame and the inner frame.

[0017] Compared with the prior art, the technical solution provided by the utility model has the following advantages:

[0018] 1. In the utility model, the hub height is shortened and the magnetic ring is built-in, so that the internal structure of the fan is exposed, and the heat is naturally discharged without accumulation;

[0019] 2. The utility model is provided with double moving blades, wherein the outer blades rotate to discharge air, and the inner blades rotate to drive the air flow inside the fan to improve the heat dissipation effect;

[0020] 3. The utility model increases the number of fan blades from 5 to 9, thereby increasing the air volume and eliminating the air volume loss caused by the shortening of the fan hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of a heat dissipation fan in the background technology of the present utility model;

[0022] Figure 2 This is the overall structural diagram of the heat dissipation fan in the utility model;

[0023] Figure 3 This is an axial cross-sectional view of the heat dissipation fan in the utility model;

[0024] Figure 4 It is a structural diagram of the fan frame in the utility model;

[0025] Figure 5 It is a structural diagram of the fan blades in the utility model.

[0026] As shown in the figure:

[0027] 1. Fan frame; 11. Inner frame; 111. Bottom frame; 112. Side frame; 12. Outer frame; 13. Stationary blades; 2. Fan blades; 21. Hub; 22. Outer blades; 23. Inner blades; 24. Inner ring; 3. Motor; 31. Stator winding; 32. Magnetic ring; 4. Fan shaft; 5. Copper sleeve; 6. Bearing. DETAILED DESCRIPTION

[0028] For ease of understanding, the cooling fan with separated frame and blades is described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figures 2 to 3 As shown, the cooling fan with separated frame and blades in this embodiment includes a fan frame 1, fan blades 2, a motor 3, and a fan shaft 4. The upper end of the fan shaft 4 is fixedly connected to the fan blades 2 coaxial therewith, and the lower end of the fan shaft 4 is inserted into the center of the motor 3.

[0032] like Figure 4 As shown, the fan frame 1 includes an inner frame 11, an outer frame 12 and static blades 13, the fan blades 2 are located at the upper end of the outer frame 12, and the inner frame 11 is located at the lower end of the outer frame 12. Specifically, the outer frame 12 is sleeved on the outside of the inner frame 11 and both ends are transparent. The inner frame 11 is coaxial with the outer frame 12, and seven static blades 13 are arranged in an annular manner therebetween. One end of the static blade 13 is fixedly connected to the outer frame 12, and the other end is fixedly connected to the inner frame 11; the upper end of the inner frame 11 is open, and the lower end of the inner frame 11 is a bottom frame 111, and the edge of the bottom frame 111 is extended upward in the vertical direction to form an annular side frame 112.

[0033] like Figure 3As shown, a motor 3 is installed in the inner frame 11. The motor 3 includes a stator winding 31 and a magnetic ring 32. The stator winding 31 and the magnetic ring 32 interact to generate magnetic force. The magnetic force drives the magnetic ring 32 and the fan blade 2 to rotate relative to the stator winding 31. The stator winding 31 is fixed on the bottom frame 111, and the side frame 112 surrounds the circumference of the stator winding 31; the fan shaft 4 is inserted in the center of the stator winding 31, and a copper sleeve 5 is arranged between the fan shaft 4 and the stator winding 31. The two ends of the copper sleeve 5 are transparent, and the lower end of the copper sleeve 5 penetrates the bottom frame 111 and is fixed on the bottom frame 111, that is, the copper sleeve 5 is relatively fixed to the stator winding 31; the copper sleeve 5 is rotatably connected to the fan shaft 4 through the bearing 6. There are two bearings 6, and the two bearings 6 are distributed axially along the fan shaft 4. The magnetic ring 32 is located between the two bearings 6 and is sleeved on the fan shaft 4.

[0034] like Figure 5 As shown, the fan blade 2 includes a hub 21, outer blades 22, inner blades 23, and an inner ring 24. The inner ring 24 is sleeved on the upper end of the fan shaft 4, and the inner ring 24 and the fan shaft 4 are fixedly connected. The outer periphery of the inner ring 24 is sleeved with a ring-shaped hub 21, and the hub 21 is located above the inner frame 11, has a short height, does not cover the inner frame 11, and does not cover the stator winding 31. Five inner blades 23 are arranged between the hub 21 and the inner ring 24. The inner blades 23 are opposite to the upper opening of the inner frame 11. Specifically, one end of the inner blade 23 is fixedly connected to the inner ring 24, and the other end is fixed. The hub 21 is connected, and 9 outer blades 22 are arranged on the outer periphery of the hub 21. The number of the outer blades 22 is increased to improve the air volume and compensate for the air volume loss caused by the shortening of the hub 21. The outer blades 22 and the inner blades 23 rotate in the same direction or in opposite directions. The outer blades 22 and the inner blades 23 rotate in the same direction. The rotation of the inner blades 23 drives the airflow in the inner frame 11 to be discharged from the opening, thereby discharging the heat accumulated in the inner frame 11. The outer blades 22 and the inner blades 23 rotate in opposite directions. The airflow generated by the rotation of the inner blades 23 enters the inner frame 11 from the opening to cool down the high heat generated by the operation of the motor 3.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A cooling fan with separated frame and blades, characterized in that: The motor comprises a stator winding and a magnetic ring; A fan shaft, one end of which is fixedly connected to a magnetic ring and inserted into the center of the stator winding, and the other end of which is fixedly connected to a coaxial fan blade; The fan blades include a hub not covered with a stator winding, outer blades arranged around the outer circumference of the hub, and inner blades arranged around the inner circumference of the hub; And a fan frame, the fan frame comprises an inner frame, a stator winding is installed in the inner frame, one end of the inner frame is open, and the opening is opposite to the position of the inner blade.

2. The cooling fan with separated frame and blades as claimed in claim 1, characterized in that: A copper sleeve is arranged between the stator winding and the fan shaft. The copper sleeve is relatively fixed to the stator winding, and the copper sleeve is rotatably connected to the fan shaft via a bearing.

3. The cooling fan with separated frame and blades as claimed in claim 2, characterized in that: There are two bearings in total, and the magnetic ring is located between the two bearings.

4. The cooling fan with separated frame and blades as claimed in claim 3, characterized in that: The end of the inner frame facing away from the opening is a bottom frame, and the edge of the bottom frame is extended toward the direction of the opening to form a side frame surrounding the stator winding.

5. The cooling fan with separated frame and blades as claimed in claim 4, characterized in that: Both ends of the copper sleeve are transparent and penetrate the bottom frame.

6. The cooling fan with separated frame and blades as claimed in claim 1, characterized in that: The inner blades have opposite rotation directions to the outer blades.

7. The cooling fan with separated frame and blades as claimed in claim 1, characterized in that: There are 9 outer blades in total.

8. The cooling fan with separated frame and blades as claimed in claim 1, characterized in that: There are 5 inner blades in total.

9. The cooling fan with separated frame and blades as claimed in claim 1, characterized in that: The fan frame also includes an outer frame which is sleeved outside the inner frame and is transparent at both ends, and a plurality of stationary blades are arranged between the outer frame and the inner frame.

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