Gapless fan frame and bipolar fan

Abstract

The utility model discloses a gapless fan frame and a bipolar fan, and belongs to the technical field of fans, the gapless fan frame comprises a flow guide frame, a flow guide air duct is formed in the center of the flow guide frame, the flow guide air duct is provided with an air inlet end and an air outlet end which are oppositely arranged, the air outlet end is provided with a stationary blade frame, and the air inlet end is provided with a flow blocking ring; the stationary blade frame is fixedly connected with the flow guide frame through a locking structure; the flow blocking ring is formed by protruding the flow guide frame from the inner wall of the flow guide air channel in the radial direction, air flow in the flow guide air channel flows from the air inlet end to the air outlet end, and the flow blocking ring is used for preventing the air flow from flowing back. A bipolar fan includes a gapless fan frame. Frame blade gaps are reduced, airflow backflow is blocked, the airflow flowing speed is increased, the air volume is increased, the cooling efficiency of the fan is improved, and the energy consumption of the fan is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a gapless fan frame and a bipolar fan. Background Art

[0002] A fan generally consists of a fan frame, fan blades and a motor. To ensure the normal operation of the fan, the fan frame needs to serve as a mounting carrier for the fan blades and the motor, provide physical protection for the fan blades and the motor, and guide the airflow.

[0003] Based on the above requirements, the fan frame in the prior art is usually designed as an integrally molded frame, which has a accommodating cavity with a hollow bottom and an open top. The fan blades and the motor enter the accommodating cavity from the opening, the motor is fixed at the bottom of the accommodating cavity, and the fan blades are connected to the motor output shaft.

[0004] Among them, there is a gap between the fan blades and the frame. To ensure that the fan blades do not contact the frame when rotating relative to the frame, the gap is above 0.6mm; the airflow generated by the fan operation enters from the top opening of the accommodating cavity and flows out from the hollow at the bottom. Because of the existence of the gap, part of the airflow will flow along the gap from the bottom to the top of the accommodating cavity. The airflows in different directions collide with each other, which reduces the output air volume of the fan, reduces the fan operating efficiency, and increases the fan energy consumption. Utility Model Content

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A gapless fan frame comprises a guide frame, wherein a guide air duct is formed in the center of the guide frame, wherein the guide air duct has an air inlet end and an air outlet end which are arranged opposite to each other, wherein the air outlet end is provided with a stationary blade frame, and the air inlet end is provided with a baffle ring;

[0007] The stationary blade frame is fixedly connected to the guide frame through a locking structure;

[0008] The baffle ring is formed by the guide frame protruding radially from the inner wall of the guide air duct. The airflow in the guide air duct flows from the air inlet end to the air outlet end. The baffle ring is used to prevent the airflow from flowing back.

[0009] Specifically, a fan blade is installed in the guide air duct, with the end of the fan blade away from its own axis as the distal end, and the ring width of the baffle ring is greater than or equal to the distance from the distal end of the fan blade to the inner wall of the guide air duct.

[0010] Specifically, the fan blade includes a hub, a fixing ring sleeved on the outer circumference of the hub, and a plurality of blades arranged between the hub and the fixing ring. One end of the blade is fixedly connected to the hub, and the other end is fixedly connected to the fixing ring.

[0011] Specifically, the baffle ring is coaxial with the fan blade.

[0012] Specifically, the locking structure includes a buckle ring and a buckle tooth. The buckle ring is arranged on the outer wall of the guide frame, and the buckle tooth is arranged on the outer wall of the stationary blade frame. The buckle tooth is inserted into the buckle ring.

[0013] Specifically, the stationary blade frame includes an inner frame, an outer frame sleeved on the outer periphery of the inner frame, and a plurality of stationary blades arranged between the inner frame and the outer frame. One end of the stationary blade is fixedly connected to the inner frame, and the other end is fixedly connected to the outer frame.

[0014] A bipolar fan comprises two monopolar fans assembled into one body along the axial direction, wherein the monopolar fan comprises a gapless fan frame.

[0015] The technical solution provided by the utility model has the following advantages compared with the existing technology:

[0016] 1. A baffle ring is set to reduce the gap between the frame and blades. During the operation of the fan, it reduces air leakage, blocks air backflow, and ensures the unidirectional flow of air. Under the condition of the same fan energy consumption, reducing the gap between the frame and blades can increase the air flow speed and increase the air volume, thereby improving the fan's heat dissipation efficiency. Under the condition of the same fan heat dissipation efficiency, reducing the gap between the frame and blades can reduce the fan's energy consumption and save energy.

[0017] 2. The choke ring and the guide frame are integrally formed to ensure the effectiveness of choke and maintain the stability of the fan frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural diagram of the bipolar fan in this embodiment;

[0019] Figure 2 is an overall structural diagram of the single-pole fan in this embodiment;

[0020] Figure 3 It is an exploded view of the gapless fan in this embodiment.

[0021] As shown in the figure: 10, guide frame; 11, guide air duct; 12, baffle ring; 20, stator frame; 21, inner frame; 22, outer frame; 23, stator; 30, locking structure; 31, retaining ring; 32, retaining teeth; 40, single-pole fan; 50, fan blade; 51, hub; 52, fixing ring; 53, blade; 60, fan shaft; 70, stator; 80, magnetic ring; 90, copper sleeve. DETAILED DESCRIPTION

[0022] For ease of understanding, the gapless fan frame and the bipolar fan are 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.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations and positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1 As shown, the bipolar fan in this embodiment includes two monopolar fans 40 assembled into one along the axial direction, and the monopolar fan 40 includes a gapless fan frame. The gapless fan frame in this embodiment includes a guide frame 10 and a static blade frame 20, and the static blade frame 20 between the two monopolar fans 40 is buckled and connected.

[0026] like Figure 2 As shown, the unipolar fan 40 further includes blades 50, a fan shaft 60, a stator 70, a magnetic ring 80, and a copper sleeve 90. One end of the fan shaft 60 is inserted into the copper sleeve 90 and rotatably connected to the copper sleeve 90 via a bearing, while the other end is fixedly connected to the blades 50. The outer periphery of the copper sleeve 90 is sheathed with the stator 70. Both the stator 70 and the copper sleeve 90 are fixed to the stator frame 20. The outer periphery of the stator 70 is sheathed with the magnetic ring 80, and the outer periphery of the magnetic ring 80 is sheathed with the blades 50. The magnetic ring 80 and the blades 50 are relatively fixed, and the outer periphery of the blades 50 is sheathed with the guide frame 10.

[0027] like Figure 3 As shown, a guide air duct 11 is formed in the center of the guide frame 10. The guide air duct 11 has an air inlet end and an air outlet end that are relatively set. The air flow in the guide air duct 11 flows from the air inlet end to the air outlet end. The air outlet end is provided with a static blade frame 20, and the air inlet end is provided with a flow blocking ring 12.

[0028] Continue as Figure 3As shown, the baffle ring 12 is formed by the guide frame 10 protruding radially from the inner wall of the guide air duct 11. The baffle ring 12 has the function of preventing airflow backflow. The fan frame equipped with the baffle ring 12 can effectively guide the air passing through the fan, control the airflow direction, reduce backflow and scattering, and focus the airflow in the desired air supply direction.

[0029] like Figure 2 and Figure 3 As shown, the guide air duct 11 is equipped with a fan blade 50, with the end of the fan blade 50 away from its own axis as the distal end. The ring width of the baffle ring 12 is greater than or equal to the distance from the distal end of the fan blade 50 to the inner wall of the guide air duct 11. That is, in the axial projection of the guide frame 10, the baffle ring 12 covers the gap between the fan blade 50 and the guide frame 10. The baffle ring 12 blocks the airflow from flowing in the opposite direction along the gap between the fan blade 50 and the guide frame 10. The reverse flow is the flow of air from the air outlet end to the air inlet end. Since the baffle ring 12 and the guide frame 10 are integrally formed, the fan blade 50 cannot be assembled into the guide air duct 11 from the air inlet end. In order to ensure the smooth assembly of the fan blade 50, the static blade frame 20 and the guide frame 10 are designed to be separable from each other. Among them, because the guide frame 10 is more easily deformed than the static blade frame 20, the guide frame 10 is independent and made of metal aluminum, which can improve the overall strength of the fan frame.

[0030] like Figure 3 As shown, the stator blade frame 20 in this embodiment includes an inner frame 21, an outer frame 22 sleeved around the outer circumference of the inner frame 21, and a plurality of stator blades 23 arranged in an annular manner between the inner frame 21 and the outer frame 22. One end of the stator blade 23 is fixedly connected to the inner frame 21, and the other end is fixedly connected to the outer frame 22. The stator blade frame 20 is fixedly connected to the guide frame 10 via a locking structure 30. The locking structure 30 includes a retaining ring 31 and a retaining tooth 32. The retaining ring 31 is integrally formed on the outer wall of the guide frame 10, and the retaining tooth 32 is integrally formed on the outer wall of the outer frame 22. The retaining tooth 32 is inserted into the retaining ring 31 to achieve a fixed connection between the guide frame 10 and the stator blade frame 20.

[0031] like Figure 2 and Figure 3As shown, the fan blade 50 includes a hub 51, a fixing ring 52 sleeved on the outer periphery of the hub 51, and four blades 53 arranged between the hub 51 and the fixing ring 52. The hub 51 is sleeved on the outer periphery of the stator 70, and one end of the blade 53 is fixedly connected to the hub 51, and the other end is fixedly connected to the fixing ring 52. The fixing ring 52 increases the strength of the fan blade 50, reduces the deformation of the fan during high-speed operation, and at the same time divides the gap between adjacent blades 53 and the gap between the blade 53 and the guide frame 10, reducing the frame-leaf gap and improving operating efficiency. The baffle ring 12 is coaxial with the fan blade 50, and the inner diameter of the baffle ring 12 is less than or equal to the outer diameter of the fixing ring 52. In this embodiment, the end of the fan blade 50 away from its own axis is the outer side of the fixing ring 52, and the gap between the fan blade 50 and the guide frame 10 is the gap between the outer side of the fixing ring 52 and the guide air duct 11.

[0032] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some or all of the technical features therein may be replaced with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the various embodiments of the present invention.

Claims

1. A gapless fan frame, characterized in that: The air guide frame comprises a guide air duct formed in the center of the guide air duct, the guide air duct having an air inlet end and an air outlet end oppositely arranged, the air outlet end is provided with a stationary blade frame, and the air inlet end is provided with a baffle ring; The stationary blade frame is fixedly connected to the guide frame through a locking structure; The baffle ring is formed by the guide frame protruding radially from the inner wall of the guide air duct. The airflow in the guide air duct flows from the air inlet end to the air outlet end. The baffle ring is used to prevent the airflow from flowing back.

2. The gapless fan frame according to claim 1, wherein: The guide air duct is equipped with a fan blade, with the end of the fan blade away from its own axis as the distal end, and the ring width of the baffle ring is greater than or equal to the distance from the distal end of the fan blade to the inner wall of the guide air duct.

3. The gapless fan frame according to claim 2, wherein: The fan blades include a hub, a fixing ring sleeved on the outer circumference of the hub, and a plurality of blades arranged between the hub and the fixing ring. One end of the blade is fixedly connected to the hub, and the other end is fixedly connected to the fixing ring.

4. The gapless fan frame according to claim 3, wherein: The baffle ring is coaxial with the fan blade.

5. The gapless fan frame according to claim 1, wherein: The locking structure includes a buckle ring and a buckle tooth. The buckle ring is arranged on the outer wall of the guide frame, and the buckle tooth is arranged on the outer wall of the stationary blade frame. The buckle tooth is inserted into the buckle ring.

6. The gapless fan frame according to claim 1, wherein: The stationary blade frame includes an inner frame, an outer frame sleeved on the outer periphery of the inner frame, and a plurality of stationary blades arranged between the inner frame and the outer frame. One end of the stationary blade is fixedly connected to the inner frame, and the other end is fixedly connected to the outer frame.

7. A bipolar fan, characterized in that: The invention comprises two monopole fans assembled into one body along the axial direction, wherein the monopole fan comprises the gapless fan frame according to any one of claims 1 to 6.

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