Detachable wind and sand prevention fan

Abstract

The utility model discloses a detachable wind and sand prevention fan which comprises an upper frame, a fan base and fan blades, the upper frame is detachably installed on the fan base, the periphery of the fan blades is provided with a parapet wall, the fan blades and the parapet wall are arranged between the upper frame and the fan base, the fan blades are connected with a central spindle, and when the central spindle rotates, the fan blades can be driven to rotate synchronously. According to the detachable wind and sand prevention fan, the stator of the fan is formed by the iron core wrapping, the bearing and the copper sleeve, the rotor of the fan is formed by the shaft core, the fan blades and the like, a fan outer frame of a traditional axial flow fan is removed, the problem of frame blade gaps does not exist, the heat dissipation effect almost the same as that of a common axial flow fan can be achieved, and the service life of the fan is prolonged. And the performance of a stall area of the fan can be greatly improved, the outdoor use requirement can be met, the condensation experiment can be passed, the use requirement of a low-temperature and high-humidity environment can be met, the overall structure is simple, the design is ingenious, the manufacturing cost is low, and the fan is suitable for industrial application and popularization.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a detachable wind and sand proof fan. Background Art

[0002] Among the many product applications of cooling fans, the speed of technological upgrades and replacements of various products is fast, and the products are developing towards high performance, high integration, and long battery life. As product performance continues to improve, the cooling fans used in the products will also face severe heat dissipation challenges. Heat dissipation issues will be an important stage in the upgrade of various product equipment. Currently, various products mainly use axial-flow fans, but axial-flow fans have an upper frame and a gap between the frame and blades, which makes it easy for wind and sand or foreign objects to enter between the frame and blades when used outdoors, causing the fan to get stuck. In addition, when conducting condensation experiments or in low temperature and high humidity environments, axial-flow fans will produce dew or water droplets between the frame and blades. When the temperature is too low, the condensation of water droplets will freeze the fan blades, causing the fan to fail and not rotate. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a detachable wind and sand proof fan.

[0004] In order to achieve the above purpose and the above technical effects, the technical solution adopted by the present invention is:

[0005] A detachable wind and sand proof fan comprises an upper frame, a fan base and fan blades. The upper frame is detachably mounted on the fan base. A guard wall is provided on the periphery of the fan blades and the two are arranged between the upper frame and the fan base. The fan blades are connected to the shaft core. When the shaft core rotates, it can drive the fan blades to rotate synchronously.

[0006] Furthermore, the four corners of the bottom surface of the upper frame are provided with a plurality of positioning grooves, and the four corners of the top surface of the fan base are provided with a plurality of bosses adapted to the positioning grooves. The upper frame and the fan base are assembled together by inserting the bosses into the corresponding positioning grooves.

[0007] Furthermore, the positioning groove is a square groove.

[0008] Furthermore, the fan blades are provided in a plurality and are installed on the blade sleeve in a radial pattern with the blade sleeve as the center. A fixed boss is provided at the center of the bottom surface of the blade sleeve and is adapted to the shaft core.

[0009] Furthermore, the shaft core is detachably fixed to the central position of the fan base by a buckle, the outer wall of the shaft core is coaxially provided with a copper sleeve, the outer wall of the copper sleeve is coaxially provided with an iron core wrap, the outer wall of the iron core wrap is coaxially provided with a magnetic strip, the outer wall of the magnetic strip is coaxially provided with a magnetic sleeve, and the magnetic sleeve is provided in the fan blade sleeve.

[0010] Furthermore, the fan blades, blade sleeve, shaft core, magnetic sleeve and magnetic strip are integrated into a structure, and the copper sleeve and iron core are injected into a structure.

[0011] Furthermore, a plurality of bearings are sleeved on the shaft core, and the bearings are arranged in a copper sleeve.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model discloses a detachable wind and sand proof fan, wherein fan blades, fan blade sleeves, shaft core, magnetic sleeve and magnetic strips are integrated into a structure to form a rotor of the fan, a copper sleeve and an iron core are injected into a structure to form a stator of the fan, the shaft core is connected to the fan blade sleeve and the fan blades, and when the shaft core rotates, it can drive the fan blade sleeve and the fan blades connected to the shaft core to rotate synchronously; by designing a guard wall, airflow can be gathered, so that when there is no fan outer frame of a traditional axial flow fan, the airflow can be gathered and blown to the fan base, ensuring that the air volume and air pressure are not reduced when there is no fan outer frame; the fan outer frame of the traditional axial flow fan is removed, and the problem of frame-blade gap exists, and the heat dissipation effect almost the same as that of an ordinary axial flow fan can be achieved, and the stall zone performance of the fan can be greatly improved, so that it can meet the requirements of outdoor use, can pass the condensation test, and can meet the requirements of use in low temperature and high humidity environments. The overall structure is simple, the design is ingenious, the production cost is low, and it is suitable for industrial promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model after the upper frame is removed;

[0016] Figure 3 This is a structural diagram of the upper frame of the utility model;

[0017] Figure 4 This is a schematic structural diagram of the fan blades and blade covers of the present invention;

[0018] Figure 5 This is a schematic diagram of the structure of the utility model after the upper frame and fan blades are removed;

[0019] Figure 6 This is a schematic diagram of the structure of the utility model after the upper frame, fan blades and shaft core are removed;

[0020] Figure 7 This is a schematic diagram of the structure of the utility model after the upper frame, fan blades, magnetic sleeve, magnetic strips and shaft core are removed;

[0021] Figure 8 This is a schematic structural diagram of the iron core package of the utility model;

[0022] Figure 9 It is a bottom view of the utility model;

[0023] Figure 10 For the utility model Figure 9 A local enlarged view of point A;

[0024] Figure 11 1 is a PQ performance curve diagram of Example 1 of the utility model and a traditional axial flow fan. DETAILED DESCRIPTION

[0025] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0026] The following is a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceivable aspects and is neither intended to identify key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be provided later.

[0027] like Figure 1-10 As shown, a detachable wind and sand proof fan comprises an upper frame 1, a fan base 2 and fan blades 3, wherein the upper frame 1 is detachably mounted on the fan base 2, a guard wall 4 is provided on the periphery of the fan blades 3 and the two are placed between the upper frame 1 and the fan base 2. By designing the guard wall 4, the airflow can be gathered so that even when there is no fan outer frame of a traditional axial flow fan, the airflow can be gathered and blown toward the fan base 2, ensuring that the air volume and pressure are not reduced in the absence of a fan outer frame. A number of fan blades 3 are provided and are radially mounted on the blade cover 7 with the blade cover 7 as the center. The blade cover 7 is connected to the shaft core 21. When the shaft core 21 rotates, it can drive the fan blades 3 connected thereto to rotate synchronously.

[0028] In some embodiments, a plurality of positioning grooves 5 are provided at the four corners of the bottom surface of the upper frame 1 (i.e., the side facing the fan base 2), and a plurality of bosses 6 that are compatible with the positioning grooves 5 are provided at the four corners of the top surface of the fan base 2 (i.e., the side facing the upper frame 1). The upper frame 1 and the fan base 2 are assembled together by inserting the bosses 6 into the corresponding positioning grooves 5.

[0029] In some embodiments, the fan blades 3 are coated with a layer of negative ion powder with a thickness of 2-5 mm, which can generate negative ions in the surrounding air and have a therapeutic effect on the human body.

[0030] In some embodiments, a fixing boss 8 is provided at the center of the bottom surface of the fan cover 7 (ie, the surface facing the fan base 2 ), which is adapted to the top end of the shaft core 21 .

[0031] In some embodiments, the shaft core 21 is detachably fixed to the central position of the fan base 2 by a retaining ring 22, and a number of bearings are sleeved on the shaft core 21. A copper sleeve 9 is coaxially arranged on the outer wall of the shaft core 21, and the bearing is arranged in the copper sleeve 9. The outer wall of the copper sleeve 9 is coaxially arranged with an iron core package 10, and the outer wall of the iron core package 10 is coaxially arranged with a magnetic strip 11. The outer wall of the magnetic strip 11 is coaxially arranged with a magnetic sleeve 12, and the magnetic sleeve 12 is arranged in the fan blade sleeve 7. The fan blades 3, the fan blade sleeve 7, the shaft core 21, the magnetic sleeve 12 and the magnetic strip 11 form an integrated structure, which is the rotor of the fan, and the copper sleeve 9 and the iron core package 10 form an integrated structure, which is the stator of the fan.

[0032] In some embodiments, the core package 10 is provided with a plurality of vertical limiting holes 13 along the circumferential direction for inserting wires and the like.

[0033] The working principle of this utility model is:

[0034] A PCB circuit board 14 is provided on the fan base 2. When the PCB circuit board 14 is powered on and started, the wires connected to it are energized, thereby generating a magnetic field. The magnetism of the magnetic field repels the magnetism of the magnetic strip 11, thereby generating a repulsive force. Since the shaft core 21 can only rotate but not move, it can rotate under the action of the repulsive force, thereby driving the fan blade cover 7 and the fan blades 3 connected to the shaft core 21 to rotate synchronously.

[0035] The detachable wind and sand proof fan provided by the utility model does not have a fan outer frame, so there is no problem of frame-blade gap. Therefore, the frame-blade gap problem of traditional axial flow fans is perfectly solved, and there will be no problem of wind and sand or foreign objects entering between the frame and blades when used outdoors, thus meeting the requirements of outdoor use.

[0036] When conducting condensation tests or operating in low-temperature, high-humidity environments, conventional axial-flow fans can produce dew or water droplets between the frame and blades. When the temperature is too low, the water droplets condense and freeze the blades, causing the fan to stop rotating. The detachable wind and sand-proof fan disclosed in the utility model eliminates the problem of frame-blade gaps, eliminating the issue of blade freezing and fan stop rotating, thus ensuring normal operation even after condensation tests.

[0037] Example 1

[0038] like Figure 1-11As shown, a detachable wind and sand proof fan comprises an upper frame 1, a fan base 2 and fan blades 3, wherein the upper frame 1 is detachably mounted on the fan base 2, a guard wall 4 is provided on the periphery of the fan blades 3 and the two are placed between the upper frame 1 and the fan base 2, and the fan blades 3 are coated with a negative ion powder layer with a thickness of 3 mm. By designing the guard wall 4, the airflow can be gathered so that even when there is no fan frame of a traditional axial flow fan, the airflow can be gathered and blown toward the fan base 2, ensuring that the air volume and pressure are not reduced in the absence of the fan frame.

[0039] A positioning groove 5 is provided at each of the four corners of the bottom surface of the upper frame 1 (that is, the side facing the fan base 2), and the positioning groove 5 is a square groove. A boss 6 is provided at each of the four corners of the top surface of the fan base 2 (that is, the side facing the upper frame 1) that is compatible with the positioning groove 5. The upper frame 1 and the fan base 2 are assembled together by inserting the boss 6 into the corresponding positioning groove 5.

[0040] There are seven fan blades 3 and they are installed on the blade cover 7 in a radial pattern with the blade cover 7 as the center. A fixed boss 8 is provided at the central position of the bottom surface of the blade cover 7 (that is, the side facing the fan base 2), which is adapted to the top of the shaft core 21 to realize the connection between the shaft core 21 and the blade cover 7.

[0041] The shaft core 21 is detachably fixed to the central position of the fan base 2 by a buckle 22. Several bearings are sleeved on the shaft core 21. A copper sleeve 9 is coaxially arranged on the outer wall of the shaft core 21. The bearing is arranged in the copper sleeve 9. The outer wall of the copper sleeve 9 is coaxially arranged with an iron core package 10. The outer wall of the iron core package 10 is coaxially arranged with a magnetic strip 11. The outer wall of the magnetic strip 11 is coaxially arranged with a magnetic sleeve 12. The magnetic sleeve 12 is arranged in the blade sleeve 7. The fan blades 3, the blade sleeve 7, the shaft core 21, the magnetic sleeve 12 and the magnetic strip 11 form an integrated structure. The copper sleeve 9 and the iron core package 10 form an integrated structure, which is the rotor of the fan. The copper sleeve 9 and the iron core package 10 form an integrated structure, which is the stator of the fan. The iron core package 10 is evenly provided with four vertical limit holes 13 along the circumferential direction for inserting wires.

[0042] When the PCB circuit board 14 on the fan base 2 is powered on and started, the wires connected to it are energized, thereby generating a magnetic field. The magnetism of this magnetic field repels the magnetism of the magnetic strip 11, thereby generating a repulsive force. Since the shaft core 21 can only rotate but not move, it can rotate under the action of the repulsive force, thereby driving the fan blade cover 7 and the fan blades 3 connected to the shaft core 21 to rotate synchronously.

[0043] from Figure 11The experimental data graph shows that the detachable sand-proof fan disclosed in Example 1 significantly improves the stall zone of traditional axial-flow fans compared to conventional fans. The detachable sand-proof fan significantly outperforms conventional axial-flow fans in this stall zone. For products operating near the stall zone of conventional fans, the detachable sand-proof fan design is a more suitable option for product performance.

[0044] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0045] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A detachable wind and sand proof fan, characterized in that: It includes an upper frame, a fan base and fan blades. The upper frame is detachably mounted on the fan base. A guard wall is provided on the periphery of the fan blades and the two are arranged between the upper frame and the fan base. The fan blades are connected to the shaft core. When the shaft core rotates, it can drive the fan blades to rotate synchronously.

2. A detachable wind and sand proof fan according to claim 1, characterized in that: The four corners of the bottom surface of the upper frame are each provided with a plurality of positioning grooves, and the four corners of the top surface of the fan base are each provided with a plurality of bosses adapted to the positioning grooves. The upper frame and the fan base are assembled together by inserting the bosses into the corresponding positioning grooves.

3. A detachable wind and sand proof fan according to claim 2, characterized in that: The positioning groove is a square groove.

4. The detachable wind and sand proof fan according to claim 1, characterized in that: The fan blades are provided with a plurality of blades, which are installed on the blade cover in a radial pattern outward with the blade cover as the center. A fixed boss is provided at the center of the bottom surface of the blade cover, which is adapted to the shaft core.

5. The detachable wind and sand proof fan according to claim 1, characterized in that: The shaft core is detachably fixed to the central position of the fan base by a buckle, the outer wall of the shaft core is coaxially provided with a copper sleeve, the outer wall of the copper sleeve is coaxially provided with an iron core package, the outer wall of the iron core package is coaxially provided with a magnetic strip, the outer wall of the magnetic strip is coaxially provided with a magnetic sleeve, and the magnetic sleeve is provided in the fan blade sleeve.

6. The detachable wind and sand proof fan according to claim 5, characterized in that: The fan blades, blade sleeves, shaft core, magnetic sleeve and magnetic strips are integrated into a structure, and the copper sleeve and iron core are injected into a structure.

7. The detachable wind and sand proof fan according to claim 5, characterized in that: A plurality of bearings are sleeved on the shaft core, and the bearings are arranged in a copper sleeve.

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