Silent fan

Abstract

The utility model discloses a silent fan which comprises a lower end cover, an upper end cover, a stator and a rotor. The upper end cover and the lower end cover are connected in a buckled mode, the rotor comprises a fan blade cover, a magnetic ring and a shaft core, the fan blade cover comprises an annular base and a plurality of blades arranged in the circumferential direction of the annular base at equal angles, a first air guide channel is formed in the circumferential side wall of the upper end cover, and a second air guide channel is formed in the end face of the upper end cover. The first air guide channel and the second air guide channel are used for guiding airflow generated when the fan blade cover rotates to the external environment. The first air guide channel is located on the circumferential side wall of the upper end cover, and the second air guide channel is located on the end face of the upper end cover, so that even if the fan is in a low-rotating-speed mute state, airflow generated when the fan blade cover rotates can be effectively guided to flow towards a specific direction, disorder and obstruction of the airflow are avoided, and the service life of the fan is prolonged. The resistance of airflow in the channel is reduced; the motor has the beneficial effects of convenient assembly, good heat dissipation performance, low operation noise and the like.

Description

Technical Field

[0001] The utility model relates to the field of fans, in particular to a silent fan. Background Art

[0002] With the rapid development of the electronics and information industries, their related products have become increasingly sophisticated. During the operation of electronic product-related equipment, the accompanying problem is component heating. To facilitate heat dissipation during equipment operation, currently, heat dissipation fans are generally added to equipment in the market to assist in heat dissipation, and such heat dissipation fans are activated with the operation of the machine.

[0003] However, since the noise value of the fan is positively correlated with its rotation speed, to avoid excessive noise affecting the experience, the rotation speed of the fan is usually restricted to reduce noise, which results in a decline in the heat dissipation performance of the fan; in addition, the structure of traditional silent fans is relatively complex, resulting in a slow assembly process and affecting the production efficiency of products.

[0004] Therefore, there are defects in the prior art and improvement is needed. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a silent fan that is convenient to use, has good heat dissipation effect, and is convenient to assemble.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: a silent fan, including a lower end cover, an upper end cover, a stator, and a rotor; the upper end cover and the lower end cover are connected by snap-fitting, a receiving cavity is formed between the upper end cover and the lower end cover, and the stator is arranged in the receiving cavity;

[0007] The rotor includes a wind blade cover, a magnetic ring, and a shaft core. The wind blade cover includes an annular seat and a plurality of blades arranged at equal angles along the circumferential direction of the annular seat. The magnetic ring is attached to the inner wall of the annular seat, and the middle of the annular seat is connected to the stator through the shaft core;

[0008] A first air guiding channel is provided on the circumferential side wall of the upper end cover, and a second air guiding channel is provided on the end face of the upper end cover. The first air guiding channel and the second air guiding channel are used to guide the airflow generated when the wind blade cover rotates to the external environment.

[0009] Adopting the above technical solutions, in the silent fan described above, a conductive terminal and a circuit board are further included. The side walls of the upper end cover and the lower end cover are provided with sinking grooves for accommodating the conductive terminals;

[0010] The circuit board is arranged on the upper end cover. One end of the conductive terminal is connected to the stator through a pin, and the other end of the conductive terminal is connected to the circuit board.

[0011] With the above technical solutions, in the silent fan, there is also a temperature sensing probe, the temperature sensing probe is connected to the circuit board, the probe head of the temperature sensing probe is exposed in the second air guiding channel, and the temperature sensing probe is used to detect the temperature of the surrounding environment.

[0012] With the above technical solutions, in the silent fan, the stator includes a stator skeleton, a stator core and a shaft sleeve;

[0013] The stator skeleton is arranged on the lower end cover. The stator skeleton includes a base portion and a sleeve portion extending upward from the base portion. The stator core is arranged on the sleeve portion, and the stator core is located inside the magnetic ring. The shaft sleeve is arranged through the center of the sleeve portion and is connected to the shaft core.

[0014] With the above technical solutions, in the silent fan, the number of the first air guiding channels is two, and the two first air guiding channels are symmetrically arranged on the circumferential side wall of the upper end cover.

[0015] With the above technical solutions, in the silent fan, a plurality of positioning columns are arranged on the back of the lower end cover. An opening for easy expansion or closing is arranged on the positioning column, and a convex block extending in the horizontal direction is arranged at the bottom of the positioning column.

[0016] With the above technical solutions, in the silent fan, two symmetrically arranged accommodating grooves are arranged on the inner side wall of the lower end cover, and induction magnetic sheets are arranged in the accommodating grooves.

[0017] With the above technical solutions, in the silent fan, there is also a foam gasket, and the foam gasket is arranged on the end face of the upper end cover.

[0018] With the above technical solutions, in the silent fan, the area of the first air guiding channel accounts for more than half of the circumferential wall area of the upper end cover.

[0019] With the above technical solutions, in the silent fan, the number of the blades is seven, and the blades and the annular seat are integrally formed by injection molding.

[0020] Compared with the prior art, the present utility model has the following beneficial effects:

[0021] The first air guiding channel of the present utility model is located on the circumferential side wall of the upper end cover, while the second air guiding channel is located on the end face of the upper end cover. With such an arrangement, even when the fan is in a low-speed silent state, the airflow generated when the fan blade cover rotates can be effectively guided to flow in a specific direction, avoiding the chaos and obstruction of the airflow, reducing the resistance of the airflow in the channel, making the airflow flow more smoothly, thereby improving the heat dissipation performance of the silent fan. At the same time, the probe head of the temperature sensing probe is exposed in the second air guiding channel. The temperature sensing probe can detect the temperature of the surrounding environment and feedback it to the circuit board. The circuit board can adjust the rotation speed of the silent fan according to the temperature parameter, so as to reduce the operating noise of the silent fan while ensuring the heat dissipation effect and improving the energy efficiency. In addition, the upper end cover and the lower end cover are connected by snap fit, which can improve the assembly efficiency of the silent fan and is convenient for maintenance. Description of the Drawings

[0022] 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 use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 It is an exploded schematic diagram of the overall structure of the present utility model;

[0026] Figure 3 It is an exploded schematic diagram of the overall structure from another perspective of the present utility model;

[0027] Figure 4 It is a schematic diagram of the installation structure between the rotor and the stator of the present utility model;

[0028] Figure 5 It is an exploded schematic diagram of the stator of the present utility model;

[0029] Figure 6 It is a schematic diagram of the rotor assembly structure of the present utility model;

[0030] Figure 7 This is a schematic diagram of the upper end cover structure of the present utility model. Specific embodiments

[0031] In order to make the utility model objectives, features, and advantages of the present utility model more obvious and understandable, the following will combine the drawings in the embodiments of the present utility model to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be an intermediate component present at the same time.

[0033] The following will further illustrate the technical solutions of the present utility model in conjunction with the drawings and through specific embodiments.

[0034] As Figures 1 to 7 shown, the embodiment of the present utility model provides a silent fan, including a lower end cover 1, an upper end cover 2, a stator 3, and a rotor 4; the upper end cover 2 and the lower end cover 1 are connected by snap-fitting, and an accommodation chamber is formed between the upper end cover 2 and the lower end cover 1, and the stator 3 is disposed in the accommodation chamber; adopting snap-fitting connection between the upper end cover 2 and the lower end cover 1 can improve the assembly efficiency of the silent fan and is convenient for maintenance;

[0035] The rotor 4 includes a fan blade cover 41, a magnetic ring 42, and a shaft core 43. The fan blade cover 41 includes an annular seat 411 and a plurality of blades 412 arranged at equal angles along the circumferential direction of the annular seat 411. The magnetic ring 42 is attached to the inner wall of the annular seat 411, and the middle of the annular seat 411 is connected to the stator 3 through the shaft core 43; in this embodiment, the magnetic ring 42 is made of a permanent magnet. When the magnetic ring 42 interacts with the coil on the stator 3 to generate a magnetic field, a torque can be generated, thereby driving the fan blade cover 41 to rotate, and then generating an airflow for heat dissipation, so as to achieve the effect of cooling.

[0036] A first air guiding channel 21 is provided on the circumferential side wall of the upper end cover 2, and a second air guiding channel 22 is provided on the end face of the upper end cover 2. The first air guiding channel 21 and the second air guiding channel 22 are used to guide the airflow generated when the fan cover 41 rotates to the external environment.

[0037] The first air guiding channel 21 is located on the circumferential side wall of the upper end cover 2, while the second air guiding channel 22 is located on the end face of the upper end cover 2. With such a setting, even when the fan is in a low-speed silent state, the airflow generated when the fan cover 41 rotates can be effectively guided to flow in a specific direction, avoiding the chaos and obstruction of the airflow, reducing the resistance of the airflow in the channel, making the airflow flow more smoothly, and thus improving the heat dissipation performance of the silent fan.

[0038] As Figure 2 and Figure 3 shown, further, there are also conductive terminals 5 and a circuit board 6. Sinking grooves 20 for accommodating the conductive terminals 5 are provided on the side walls of the upper end cover 2 and the lower end cover 1. The circuit board 6 is arranged on the upper end cover 2. One end of the conductive terminal 5 is connected to the stator 3 through a pin 51, and the other end of the conductive terminal 5 is connected to the circuit board 6. The circuit board 6 has a control circuit, which can control parameters such as the start, stop, and rotation speed of the silent fan, realizing the intelligent control of the silent fan.

[0039] As Figure 2 shown, further, there is also a temperature sensing probe 61. The temperature sensing probe 61 is connected to the circuit board 6, and the probe head of the temperature sensing probe 61 is exposed in the second air guiding channel 22. The temperature sensing probe 61 is used to detect the temperature of the surrounding environment. When the circuit board 6 receives the temperature data transmitted by the temperature sensing probe 61, it can adjust the rotation speed of the silent fan according to the temperature parameter, so as to reduce the operating noise of the silent fan while ensuring the heat dissipation effect and improving the energy efficiency.

[0040] As Figure 4 and Figure 5 shown, further, the stator 3 includes a stator skeleton 31, a stator core 32, and a shaft sleeve 33. The stator skeleton 31 is arranged on the lower end cover 1. The stator skeleton 31 includes a base portion 311 and a sleeve portion 312 extending upward from the base portion 311. The stator core 32 is arranged on the sleeve portion 312, and the stator core 32 is located inside the magnetic ring 42. The shaft sleeve 33 is arranged through the center of the sleeve portion 312 and is connected to the shaft core 43. The stator core 32 is located on the sleeve portion 312 and inside the magnetic ring 42, and can generate a magnetic field interaction with the magnetic ring 42 on the rotor 4, and drive the rotor 4 to rotate through the shaft sleeve 33.

[0041] As Figure 7As shown in the figure, further, the number of the first air guiding channels 21 is two, and the two first air guiding channels 21 are symmetrically arranged on the circumferential side wall of the upper end cover 2. Through the two symmetrically arranged first air guiding channels 21, not only can the heat dissipation air flow generated by the air blade cover 41 be evenly distributed, but also the instability of air flow can be reduced, thereby reducing the noise generated when the silent fan operates.

[0042] As Figure 3 shown in the figure, further, a plurality of positioning posts 11 are provided on the back of the lower end cover 1. An opening 110 for easy expansion or closing is provided on the positioning post 11, and a convex block 111 extending in the horizontal direction is provided at the bottom of the positioning post 11. The setting of the positioning post 11 can facilitate the user to assemble the silent fan into the preset positioning hole of the device by means of positioning and clamping. The setting of the opening 110 enables the user to close the positioning post 11 by extrusion when inserting it into the positioning hole, so as to reduce the diameter and extend it into the positioning hole. The setting of the convex block 111 can prevent the silent fan from shaking or loosening during operation, and improve the installation stability of the silent fan.

[0043] As Figure 2 shown in the figure, further, two symmetrically arranged accommodating grooves 12 are provided on the inner side wall of the lower end cover 1, and an induction magnetic sheet 13 is provided in the accommodating groove 12. The induction magnetic sheet 13 can be used to monitor the rotation speed of the silent fan. When the fan operates, the induction magnetic sheet 13 will generate corresponding signals, and these signals can be transmitted to the circuit board 6 to monitor the rotation speed of the silent fan in real time.

[0044] As Figure 1 and Figure 2 shown in the figure, further, a foam gasket 7 is further included, and the foam gasket 7 is arranged on the end face of the upper end cover 2. It should be noted that the foam gasket 7 is used to fit on the end face of the installation device to reduce the vibration generated when the silent fan operates from being transmitted to the installation device, thereby reducing the noise level of the entire system.

[0045] Further, the area of the first air guiding channel 21 accounts for more than half of the circumferential wall area of the upper end cover 2. With such a setting, the larger area of the first air guiding channel 21 can increase the air volume and air pressure generated by the silent fan, and there is more space for the silent fan to inhale and exhaust air, thereby improving the wind power output of the silent fan, increasing the air volume and air pressure, and improving the performance of the fan.

[0046] As Figure 4 shown in the figure, further, the number of the blades 412 is seven, and the blades 412 and the annular seat 411 are of an injection-molded integral structure. The injection-molded integral structure can improve the structural strength and stability of the air blade cover 41, reduce the seams and looseness between components, and reduce the risk of noise or failure caused by component detachment or looseness.

[0047] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A silent fan, characterized in that: It includes a lower end cover, an upper end cover, a stator and a rotor; the upper end cover is connected to the lower end cover by buckling, a containing chamber is formed between the upper end cover and the lower end cover, and the stator is arranged in the containing chamber; The rotor comprises a fan blade cover, a magnetic ring and an axis core, the fan blade cover comprises an annular seat and a plurality of blades arranged at equal angles along the circumferential direction of the annular seat, the magnetic ring is attached to the inner wall of the annular seat, and the middle part of the annular seat is connected to the stator through the axis core; A first air guide channel is provided on the circumferential side wall of the upper end cover, and a second air guide channel is provided on the end surface of the upper end cover. The first air guide channel and the second air guide channel are used to guide the airflow generated when the fan cover rotates to the external environment.

2. The silent fan according to claim 1, characterized in that: It also includes a conductive terminal and a circuit board, and the side walls of the upper end cover and the lower end cover are provided with a sink groove for accommodating the conductive terminal; The circuit board is arranged on the upper end cover, one end of the conductive terminal is connected to the stator through a pin, and the other end of the conductive terminal is connected to the circuit board.

3. The silent fan according to claim 2, characterized in that: A temperature sensing probe is also included. The temperature sensing probe is connected to the circuit board. The probe portion of the temperature sensing probe is exposed in the second air guide channel. The temperature sensing probe is used to detect the temperature of the surrounding environment.

4. The silent fan according to claim 1, characterized in that: The stator comprises a stator frame, a stator core and a shaft sleeve; The stator frame is arranged on the lower end cover, and the stator frame includes a base portion and a sleeve portion extending upward from the base portion. The stator core is arranged on the sleeve portion, and the stator core is located inside the magnetic ring. The shaft sleeve is arranged through the center of the sleeve portion and is connected to the shaft core.

5. The silent fan according to claim 1, characterized in that: The number of the first air guiding channels is two, and the two first air guiding channels are symmetrically arranged on the circumferential side wall of the upper end cover.

6. The silent fan according to claim 1, characterized in that: A plurality of positioning columns are arranged on the back of the lower end cover, openings are arranged on the positioning columns for easy opening or closing, and convex blocks extending in the horizontal direction are arranged at the bottom of the positioning columns.

7. The silent fan according to claim 2, characterized in that: Two symmetrically arranged containing grooves are arranged on the inner side wall of the lower end cover, and induction magnetic sheets are arranged in the containing grooves.

8. The silent fan according to claim 1, characterized in that: It also includes a foam gasket, which is arranged on the end surface of the upper end cover.

9. The silent fan according to claim 5, characterized in that: The area of ​​the first air guiding channel accounts for more than half of the circumferential wall area of ​​the upper end cover.

10. The silent fan according to any one of claims 1 to 9, characterized in that: The number of the blades is seven, and the blades and the annular seat are an integrally-molded structure.

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