A host fan

Abstract

The utility model relates to a kind of host computer fan, including frame assembly, and at least two groups of fan blade assemblies;Characterized in that, every surface of frame assembly is set to flat surface, so that it is not easy to accumulate dust and easy to clean;Every flat surface is set to mirror surface and / or luminous surface and / or base surface, so that cleaning and heat dissipation performance are better, and its appearance is extremely ornamental;Frame assembly includes mutually cover base and outer frame, and multiple upper covers covered on the upper of outer frame;Base has corresponding mounting portion with fan blade assembly, and mounting portion has upper and lower through opening site;Outer frame is provided with corresponding first accommodating hole with every mounting portion, and upper cover is provided with corresponding second accommodating hole with first accommodating hole, every fan blade assembly is set on every mounting portion and is placed in first accommodating hole and second accommodating hole, and is cooled through opening site and first accommodating hole, second accommodating hole, and the opening site and accommodating hole of enough large space can guarantee heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to the field of fan device technology, and in particular to a host fan. Background Technology

[0002] The cooling fans commonly used in existing computer hosts often have many ventilation holes on their surface in order to dissipate heat as much as possible. However, after a long period of use, dust inevitably accumulates on the ventilation holes, which in turn affects heat dissipation. Moreover, since there are many ventilation holes on the cooling fan, the size of the ventilation holes is inevitably small, which makes it difficult to wipe off the dust. Utility Model Content

[0003] The technical problem to be solved by this utility model is that existing cooling fans have the defect of being difficult to clean due to dust accumulation, which affects heat dissipation.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a host fan, including a frame assembly and at least two sets of fan blade assemblies disposed on the frame assembly; characterized in that each surface of the frame assembly is set as a flat surface, and each flat surface is set as a mirror surface and / or a light-emitting surface and / or a base surface; the frame assembly includes a base and an outer frame that overlap each other, and a plurality of upper covers covering the outer frame; The base has a mounting portion corresponding to the fan blade assembly, and the mounting portion has an opening that extends vertically; the outer frame has a first receiving hole corresponding to each mounting portion, and the upper cover has a second receiving hole corresponding to the first receiving hole; each fan blade assembly is disposed on each mounting portion and placed in the first receiving hole and the second receiving hole, and dissipates heat through the opening and the first receiving hole and the second receiving hole.

[0005] Furthermore, the base is provided with a first sidewall on both sides in the first direction, and a slot is provided on the first sidewall near the end of the outer frame; the base is provided with a positioning platform on the bottom surface in the second direction. The outer frame is provided with protruding plates corresponding to the slot on both sides in the first direction, and with second sidewalls on both sides in the second direction. The second sidewalls are provided on the positioning platform, and the protruding plates are inserted into the slots, so that the base and the outer frame fit tightly together and have flat sidewall surfaces. The upper cover is provided around each of the fan blade assemblies and is fastened to the outer frame; The second sidewall is provided with two stepped surfaces, and the surface of the second sidewall and its stepped surfaces are provided with a mirror surface, a light-emitting surface and / or a base surface. At least one stepped surface is provided on the upper surface of the outer frame along the periphery of the fan blade assembly, and the upper surface of the outer frame and its stepped surface are provided with a light-emitting surface and / or a base surface; The upper cover, the first side wall, and the convex plate are provided with a base surface and / or a light-emitting surface.

[0006] Furthermore, the second sidewall is recessed from the outside inward with a first step and a second step, and a first flat plate and a second flat plate are respectively provided in the first step and the second step. The shape of the first step is consistent with the shape of the first flat plate, and the shape of the second step is consistent with the shape of the second flat plate. The surface of the second sidewall and the surface of the first step are set as the light-emitting surface, and the surface of the first flat plate and the second flat plate are set as the mirror surface.

[0007] Furthermore, a plurality of third steps are provided on the upper surface of the outer frame. The third steps are located around the fan blade assembly or between two fan blade assemblies. A third flat plate is provided in each third step. The surface of the third step is set as the light-emitting surface, and the surface of the third flat plate is set as the base surface or the mirror surface.

[0008] Furthermore, a fourth step is recessed inward at the third step between the two fan blade assemblies, and a fourth flat plate is provided in each of the fourth steps. The surface of the fourth step is set as the light-emitting surface, and the surface of the fourth flat plate is set as the base surface.

[0009] Furthermore, a fifth step is provided on the upper surface of the outer frame around the first receiving hole, and the upper cover is placed on the fifth step. After the upper cover is closed on the outer frame, the upper surface of the upper cover is flush with the upper surface of the outer frame. A groove is provided downward on the surface between the two fifth steps and on the convex plate of the outer frame. The groove is located in the first direction. The shape of the upper cover is consistent with the shape of the fifth step. The upper cover has protrusions on both sides in the first direction, and the two protrusions are inserted into each pair of grooves. The upper surface of the outer frame and the surface of the convex plate of the outer frame are set as the light-emitting surface, and the upper surface of the upper cover is set as the base surface.

[0010] Furthermore, the fifth step is provided with a plurality of fastening holes around its perimeter, and the lower surface of the upper cover is provided with a snap fastening part corresponding to the fastening holes. The snap fastening part is inserted into the fastening holes and quickly snapped onto the lower surface of the outer frame.

[0011] Furthermore, each of the mounting portions is provided with a first partition wall on its outer periphery, and a plurality of limiting posts are evenly arranged along the outer periphery of the first partition wall, and each of the first partition walls is provided with at least one positioning groove in a first direction; a second partition wall is provided on the outer periphery of the first receiving hole of the outer frame, and the shape of the second partition wall corresponds to that formed by the plurality of limiting posts; a second receiving hole is provided in the middle of the upper cover, and a third partition wall is provided on the outer periphery of the second receiving hole, and a positioning piece corresponding to the positioning groove is provided on the third partition wall; when the base and the outer frame are closed and the upper cover is inserted into the first receiving hole, the third partition wall corresponds to the first partition wall, and the third partition wall is restricted by the plurality of limiting posts and cannot be moved, and is restricted by the positioning piece being placed in the positioning groove and cannot be rotated.

[0012] Furthermore, the fan blade assembly includes blades, a cover ring, and a cover plate. A base with a ring of positioning holes is provided in the middle of the blades. The cover ring has a ring of positioning protrusions to be inserted into the positioning holes so that the cover ring is fixed to the base. A positioning platform is provided in the middle of the cover ring, and the cover plate covers the positioning platform. The upper surface of the cover ring is set as the light-emitting surface, and the upper surface of the cover plate is set as the base surface.

[0013] Furthermore, there is an accommodating space between the base and the outer frame, and several wires and several light strips are arranged in the accommodating space. The wires supply power to the fan blade assembly and power the light strips to illuminate.

[0014] The beneficial effects of this utility model are as follows: Each surface of the frame assembly of the host fan provided by this utility model is set as a flat surface, making it less prone to dust accumulation and easy to wipe and clean; in addition, the mounting part on the frame assembly has a sufficiently large opening and receiving hole for installing the fan blade assembly, which can ensure heat dissipation performance; moreover, when each surface of the frame assembly is set as a mirror, it is even easier to clean and can support some heat dissipation, making the cleaning and heat dissipation performance better; setting the surface of the frame assembly with a mirror and a light-emitting surface can make its appearance highly attractive; its structure is simple and concise, easy to manufacture, and cost controllable. Attached Figure Description

[0015] Figure 1 An isometric view of an embodiment of this utility model.

[0016] Figure 2 An explosion according to an embodiment of the present invention Figure 1 .

[0017] Figure 3 An explosion according to an embodiment of the present invention Figure 2 .

[0018] Figure 4 An isometric view of the top cover of one embodiment of this utility model.

[0019] Figure 5 An exploded view of a fan blade assembly according to an embodiment of this utility model.

[0020] Label Explanation: 1. Frame assembly; 11. Base; 111. Mounting part; 1111. Opening; 1112. First partition wall; 1113. Limiting post; 1114. Positioning groove; 112. First side wall; 113. Slot; 114. Positioning platform; 12. Outer frame; 121. First receiving hole; 1211. Second partition wall; 122. Protruding plate; 1221. Groove; 123. Second side wall; 1231. First step; 1232. Second step; 1233. First flat plate; 1234. Second flat plate; 124. Third step; 1241. Third flat plate; 1242. Fourth step; 1243. Fourth flat plate; 125. Fifth step; 1251. Fastening hole; 13. Top cover; 131. Second receiving hole; 1311. Third partition; 1312. Positioning piece; 132. Protrusion; 133. Inverted part; 2. Fan blade assembly; 21. Blade; 211. Positioning hole; 212. Base; 22. Cover ring; 221. Positioning protrusion; 222. Positioning platform; 23. Cover plate. Detailed Implementation

[0021] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] Please refer to Figures 1 to 5 A host computer fan includes a frame assembly 1 and at least two sets of fan blade assemblies 2, the fan blade assemblies 2 being disposed on the frame assembly 1, the frame assembly 1 being installable inside a computer chassis, and the fan blade assemblies 2 working to dissipate the heat generated by the computer operation that accumulates inside the chassis.

[0023] Specifically, the frame assembly 1 includes a base 11 and an outer frame 12 that covers the base 11. There is an accommodating space between the base 11 and the outer frame 12. Several wires are arranged in the accommodating space to supply power to the fan blade assembly 2.

[0024] Specifically, the base 11 can be rectangular, elliptical, or other shapes, and the outer frame 12 has the same shape as the base 11. The base 11 and the outer frame 12 can be made of engineering plastics such as acrylonitrile-butadiene-styrene copolymer (ABS), polypropylene (PP), polycarbonate (PC), and polybutylene terephthalate (PBT).

[0025] This can be understood as follows: the base 11 fixes the outer frame 12 and multiple sets of fan blade assemblies 2, and can be installed inside the computer case. Specifically, the base 11 can be installed at the heat dissipation vent of the computer case to dissipate the heat generated by the computer host working inside the case through the host fan. Alternatively, the base 11 can also be installed next to components such as the motherboard and CPU to provide heat dissipation for the corresponding components. Specifically, multiple first locking holes can be provided at intervals on the outer periphery near the base 11, and second locking holes corresponding to the first locking holes are provided on the outer periphery near the outer frame 12. The frame assembly 1 is locked to the heat dissipation vent of the case or next to the host components by passing the fastener through the second locking holes and the first locking holes.

[0026] This can be understood as follows: the base 11 has at least two mounting portions 111 arranged side by side; the outer frame 12 has a first receiving hole 121 corresponding to each mounting portion 111; each mounting portion 111 is connected to a fan blade assembly 2, and the fan blade assembly 2 is placed within the first receiving hole 121. More specifically, each mounting portion 111 has a rotating shaft protruding in the middle, and several connecting holes are provided next to the rotating shaft. A motor is connected to each rotating shaft, and the motor is locked to the base 11 by fasteners such as screws passing through the connecting holes. Each fan blade assembly 2 is placed on top of each motor and connected to the motor. The motor is powered by a wire, and the motor drives the fan blade assembly 2 to rotate for heat dissipation.

[0027] Furthermore, each mounting part 111 has a first partition wall 1112 around its outer periphery. The first partition wall 1112 and the pivot position are connected by an opening 1111, and the first partition wall 1112 and the pivot position are connected by multiple connecting walls at the opening 1111. A plurality of limiting posts 1113 are evenly arranged around the outer periphery of the first partition wall 1112. The height of the limiting posts 1113 is higher than the height of the first partition wall 1112. In addition, a second partition wall 1211 is arranged around the outer periphery of the first receiving hole 121 of the outer frame 12. The shape of the second partition wall 1211 corresponds to the shape formed by the plurality of limiting posts 1113. Moreover, a top cover 13 is provided on the outer frame 12 facing the first receiving hole 121. A second receiving hole 131 is opened in the middle of the top cover 13 to accommodate the fan blade assembly 2. In particular, a third partition wall 1311 is provided around the outer periphery of the second receiving hole 131. When the base 11 and the outer frame 12 are closed and the upper cover 13 is inserted into the first receiving hole 121, the third partition wall 1311 corresponds to the first partition wall 1112, and the third partition wall 1311 is restricted by multiple limiting posts 1113 and cannot move, thereby ensuring the stability of the position after the base 11, the outer frame 12 and the upper cover 13 are closed. In order to further restrict the upper cover 13 from rotating in the first receiving hole 121, the third partition wall 1311 is provided with positioning pieces 1312 protruding from both sides of the first direction toward the base 11. Each first partition wall 1112 is provided with a positioning groove 1114 corresponding to the positioning piece 1312 in the first direction. When the upper cover 13 is inserted into the first receiving hole 121, the upper cover 13 is restricted by the positioning pieces 1312 and cannot move in the circumferential direction, thereby ensuring the stable installation of the upper cover 13.

[0028] In order to securely connect the base 11 and the outer frame 12 into one unit, the base 11 is provided with a plurality of first fastening holes evenly distributed around the periphery near the mounting part 111, and the outer frame 12 is provided with a plurality of second fastening holes corresponding to the first fastening holes. Fasteners are passed through the first fastening holes and the second fastening holes to securely connect the base 11 and the outer frame 12.

[0029] Specifically, multiple surfaces of the frame assembly 1 are designed as flat surfaces, making it easy to wipe away dust adhering to the surface of the host fan. Furthermore, for aesthetic purposes, the base 11 has first sidewalls 112 on both sides in the first direction, and a slot 113 is provided on the side of the first sidewall 112 closest to the outer frame 12. The outer frame 12 has protrusions 122 on both sides in the first direction corresponding to the slots 113. The protrusions 122 are inserted into the slots 113, ensuring a tight fit between the base 11 and the outer frame 12 in the first direction. However, the outer frame 12 has second sidewalls 123 on both sides in the second direction, and the base 11 has a positioning platform 114 on its bottom surface in the second direction corresponding to the second sidewalls 123. The second sidewalls 123 are positioned on the positioning platform 114, ensuring a tight fit between the base 11 and the outer frame 12 in the second direction. This results in the frame assembly 1 forming a flat sidewall surface through the first sidewalls 112 and the second sidewalls 123.

[0030] Furthermore, the second sidewall 123 is recessed from the outside inwards with a first step 1231 and a second step 1232, and a first flat plate 1233 and a second flat plate 1234 are respectively arranged within the first step 1231 and the second step 1232; both the first flat plate 1233 and the second flat plate 1234 are mirrored, and the surfaces of the first step 1231 and the second step 1232 are provided with polyhedral prisms, and a light strip is provided on the inner side of the second sidewall 123. When powered on, the light strip emits light and refracts it onto the polyhedral prisms, giving the first step 1231 and the second step 1232 a beautiful and dazzling appearance with multiple different colors. Simultaneously, a polyhedral prism is also provided on the outer surface of the convex plate 122, and when powered on, its appearance is the same as that of the first step 1231 and the second step 1232.

[0031] Furthermore, in some embodiments, a plurality of third steps 124 are provided on the upper surface of the outer frame 12. The third steps 124 can be located around the first receiving hole 121 or between two first receiving holes 121. Alternatively, a fourth step 1242 is recessed inward at the third step 124 between two first receiving holes 121. Each third step 124 and each fourth step 1242 contains a third flat plate 1241 and a fourth flat plate 1243. The appearance of the third steps 124, fourth steps 1242, third flat plates 1241, and fourth flat plates 1243 can be the same as that of the first steps 1231, second steps 1232, first flat plates 1233, and second flat plates 1234, or they can have different appearances, as long as they are aesthetically pleasing and easy to clean.

[0032] Furthermore, in some embodiments, a fifth step 125 is provided around the first receiving hole 121 on the upper surface of the outer frame 12, and the upper cover 13 covers the fifth step 125. After the upper cover 13 is closed on the outer frame 12, its upper surface is consistent with the upper surface of the outer frame 12. Specifically, a groove 1221 is provided downward on the surface between the two fifth steps 125, and the groove 1221 is provided in the first direction; and a groove 1221 is also provided on the protrusion plate 122 of the outer frame 12; the shape of the upper cover 13 is consistent with the shape of the fifth step 125, and a protrusion 132 is provided on both sides of the upper cover 13 in the first direction, and the two protrusions 132 are respectively inserted into the groove 1221 of the protrusion plate 122 and / or the groove 1221 of the fifth step 125. The surfaces of the fifth step 125 and the top cover 13 can be the same as the first step 1231, the second step 1232, the first flat plate 1233, and the second flat plate 1234, or they can be designed with different appearances, as long as they are aesthetically pleasing and easy to clean. In order to quickly install the top cover 13 onto the fifth step 125, the fifth step 125 is provided with multiple snap-fit ​​holes 1251 around its perimeter. The lower surface of the top cover 13 is provided with a snap-fit ​​part 133 corresponding to the snap-fit ​​hole 1251. When the top cover 13 is placed in the second receiving hole 131, the snap-fit ​​part 133 is directly inserted into the snap-fit ​​hole 1251 and snapped onto the lower surface of the outer frame 12, which ensures both quick connection between the top cover 13 and the outer frame 12 and stable connection between the top cover 13 and the outer frame 12.

[0033] Specifically, the fan blade assembly 2 includes blades 21, a cover ring 22, and a cover plate 23. A base 212 is provided in the middle of the blades 21, and a ring of positioning holes 211 is formed on the base 212. The outer periphery of the cover ring 22 is provided with positioning protrusions 221 corresponding to the positioning holes 211. The positioning protrusions 221 are inserted into the positioning holes 211, so that the cover ring 22 is connected to the base 212. Furthermore, a positioning platform 222 is provided in the middle of the cover ring 22, and the cover plate 23 is placed on the positioning platform 222. Moreover, the appearance surface of the cover ring 22 and the cover plate 23 can be set as needed. For example, the appearance effect of the cover ring 22 and the cover plate 23 can be set to be the same as the first step 1231 and the first flat plate 1233, so that the host fan has a variety of appearance effects.

[0034] In other embodiments of this utility model, a host fan includes a frame assembly 1 consisting of a base 11 and an outer frame 12, and three sets of fan blade assemblies 2. The fan blade assemblies 2 are disposed on the frame assembly 1. The frame assembly 1 can be installed at the heat dissipation vent inside the computer case, and dissipates the heat generated by the computer operation and accumulated inside the case through the operation of the fan blade assemblies 2. The frame assembly 1 is rectangular in shape, and the three sets of fan blade assemblies 2 are evenly arranged side by side. The base 11 and the outer frame 12 have the same shape. Four first locking posts are protruding at the four corners of the base 11, and each first locking post is provided with a first locking hole. Second locking posts corresponding to the four first locking posts are protruding at the four corners of the outer frame 12, and each second locking post is provided with a second locking hole. A fastener passes through the second locking hole and the first locking hole to lock the frame assembly 1 to the case.

[0035] Specifically, the length direction of frame component 1 is set as the first direction, and the width direction of frame component 1 is set as the second direction.

[0036] The base 11 has three mounting portions 111 arranged side by side in the first direction. Three sets of fan blade assemblies 2 are respectively mounted on the three mounting portions 111. The outer frame 12 has first receiving holes 121 corresponding to the mounting portions 111 in the first direction. The fan blade assemblies 2 are respectively received in the first receiving holes 121. Each first receiving hole 121 has a cover 13. Each mounting portion 111 has a protruding pivot, and a motor is connected to the pivot to drive the fan blade assembly 2 to rotate for heat dissipation. Moreover, the base 11 has a first fastening post protruding between every two mounting portions 111. The outer frame 12 has a second fastening post corresponding to the first fastening post. The first fastening post has a first fastening hole, and the second fastening post has a second fastening hole. Fasteners pass through the first fastening holes and the second fastening holes to fasten the base 11 and the outer frame 12.

[0037] All six surfaces of the frame assembly 1 are designed as flat surfaces for easy cleaning and aesthetic appeal. The base 11 has first sidewalls 112 on both sides in the first direction, and a slot 113 is provided on the side of the first sidewall 112 closest to the outer frame 12. The outer frame 12 has protruding plates 122 on both sides in the first direction, corresponding to the slots 113. The protruding plates 122 are inserted into the slots 113, ensuring a tight fit between the base 11 and the outer frame 12 in the first direction. The outer frame 12 has second sidewalls 123 on both sides in the second direction. The base 11 has a positioning platform 114 on its bottom surface in the second direction, corresponding to the second sidewalls 123. The second sidewalls 123 are positioned on the positioning platform 114, ensuring a tight fit between the base 11 and the outer frame 12 in the second direction. The second sidewall 123 has a first step 1231 and a second step 1232 recessed from the outside inwards, and a first flat plate 1233 and a second flat plate 1234 are respectively disposed within the first step 1231 and the second step 1232. Multiple third steps 124 are disposed on the upper surface of the outer frame 12, and the third steps 124 can be disposed around the first receiving hole 121 or between two first receiving holes 121. Alternatively, a fourth step 1242 is recessed inwards at the third step 124 between two first receiving holes 121, and a third flat plate 1241 and a fourth flat plate 1243 are disposed within each third step 124 and each fourth step 1242. A fifth step 125 is disposed around the first receiving hole 121 on the upper surface of the outer frame 12, and the upper cover 13 covers the fifth step 125. Both the first flat plate 1233 and the second flat plate 1234 are mirrored. The surfaces of the first step 1231 and the second step 1232 are each equipped with a polyhedral prism structure, and an LED strip is installed inside the second sidewall 123. When powered on, the LED strip emits light that refracts onto the polyhedral prism structure, giving the first step 1231 and the second step 1232 multiple beautiful and dazzling colors. The appearance of the third step 124, the fourth step 1242, the third flat plate 1241 and the fourth flat plate 1243, the fifth step 125, and the top cover 13 can be set to be the same as the first step 1231, the second step 1232, the first flat plate 1233, and the second flat plate 1234, or they can be set to different appearances, as long as they are aesthetically pleasing and easy to clean.

[0038] The fifth step 125 is provided with four fastening holes 1251 around its perimeter. The lower surface of the upper cover 13 is provided with a buckle part 133 corresponding to the fastening holes 1251. When the upper cover 13 is placed in the second receiving hole 131, the buckle part 133 is directly inserted into the fastening hole 1251 and buckled to the lower surface of the outer frame 12. The upper cover 13 is quickly and stably connected to the outer frame 12.

[0039] The fan blade assembly 2 includes blades 21, a cover ring 22, and a cover plate 23. A base 212 is positioned in the center of the blades 21, and a ring of positioning holes 211 is formed on the base 212. Positioning protrusions 221 corresponding to the positioning holes 211 are provided around the outer periphery of the cover ring 22. The positioning protrusions 221 are inserted into the positioning holes 211, connecting the cover ring 22 to the base 212. A positioning platform 222 is positioned in the center of the cover ring 22, and the cover plate 23 is placed on the positioning platform 222. The appearance of the cover ring 22 and the cover plate 23 is designed to be the same as that of the first step 1231 and the first flat plate 1233. Through the appearance design of the outer frame assembly 12 and the fan blade assembly 2, the main unit fan has a variety of visual effects.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A host fan, characterized in that, It includes a frame assembly (1) and at least two sets of fan blade assemblies (2) disposed on the frame assembly (1); The frame assembly (1) is characterized in that each surface of the frame assembly (1) is configured as a flat surface, and each flat surface is configured as a mirror and / or a light-emitting surface and / or a base surface; the frame assembly (1) includes a base (11) and an outer frame (12) that overlap each other, and a plurality of upper covers (13) covering the outer frame (12). The base (11) has a mounting part (111) corresponding to the fan blade assembly (2), and the mounting part (111) has an opening (1111) that runs vertically through the base. The outer frame (12) has a first receiving hole (121) corresponding to each mounting part (111), and the upper cover (13) has a second receiving hole (131) corresponding to the first receiving hole (121). Each fan blade assembly (2) is disposed on each mounting part (111) and placed in the first receiving hole (121) and the second receiving hole (131), and dissipates heat through the opening (1111) and the first receiving hole (121) and the second receiving hole (131).

2. The host fan according to claim 1, characterized in that: The base (11) has a first sidewall (112) on both sides in the first direction, and a slot (113) is provided on the first sidewall (112) near the outer frame (12). The base (11) has a positioning platform (114) on the bottom surface in the second direction. The outer frame (12) has protruding plates (122) on both sides of the first direction corresponding to the slot (113), and second sidewalls (123) on both sides of the second direction. The second sidewalls (123) are set on the positioning platform (114), and the protruding plates (122) are inserted into the slot (113), so that the base (11) and the outer frame (12) fit tightly together to form a flat sidewall surface. The upper cover (13) covers and fastens to the outer frame (12) around each of the fan blade assemblies (2). The second sidewall (123) is provided with two stepped surfaces, and the surface of the second sidewall (123) and its stepped surfaces are provided with mirror, light-emitting surface and / or base surface; At least one stepped surface is provided on the upper surface of the outer frame (12) around the fan blade assembly (2), and the upper surface of the outer frame (12) and its stepped surface are provided with a light-emitting surface and / or a base surface; The upper cover (13), the first side wall (112), and the protruding plate (122) are provided with a base surface and / or a light-emitting surface.

3. The host fan according to claim 2, characterized in that: The second sidewall (123) is recessed from the outside to the inside with a first step (1231) and a second step (1232). A first flat plate (1233) and a second flat plate (1234) are respectively provided in the first step (1231) and the second step (1232). The shape of the first step (1231) is consistent with the shape of the first flat plate (1233), and the shape of the second step (1232) is consistent with the shape of the second flat plate (1234). The surface of the second sidewall (123) and the surface of the first step (1231) are set as the light-emitting surface, and the surface of the first flat plate (1233) and the second flat plate (1234) are set as the mirror surface.

4. The host fan according to claim 2, characterized in that: Multiple third steps (124) are provided on the upper surface of the outer frame (12). The third steps (124) are located around the fan blade assembly (2) or between two fan blade assemblies (2). A third flat plate (1241) is provided in each third step (124). The surface of the third step (124) is set as the light-emitting surface, and the surface of the third flat plate (1241) is set as the base surface or the mirror surface.

5. The host fan according to claim 4, characterized in that: [the fan is used in conjunction with other components]. A fourth step (1242) is recessed inward at the third step (124) between the two fan blade assemblies (2). A fourth flat plate (1243) is provided in each of the fourth steps (1242). The surface of the fourth step (1242) is set as the light-emitting surface, and the surface of the fourth flat plate (1243) is set as the base surface.

6. The host fan according to claim 2, characterized in that: The upper surface of the outer frame (12) is provided with a fifth step (125) around the first receiving hole (121). The upper cover (13) covers the fifth step (125). After the upper cover (13) is closed on the outer frame (12), the upper surface of the upper cover (13) is flat with the upper surface of the outer frame (12). A groove (1221) is provided downward on the surface between the two fifth steps (125) and on the protrusion (122) of the outer frame (12). The groove (1221) is provided in the first direction; the shape of the upper cover (13) is consistent with the shape of the fifth step (125), and the upper cover (13) is provided with protrusions (132) on both sides in the first direction. The two protrusions (132) are inserted into each of the two grooves (1221); the upper surface of the outer frame (12) and the surface of the protrusion plate (122) of the outer frame (12) are set as the light-emitting surface, and the upper surface of the upper cover (13) is set as the base surface.

7. The host fan according to claim 6, characterized in that: The fifth step (125) is provided with a plurality of fastening holes (1251) around its perimeter. The lower surface of the upper cover (13) is provided with a buckle part (133) corresponding to the fastening hole (1251). The buckle part (133) is inserted into the fastening hole (1251) and quickly buckled to the lower surface of the outer frame (12).

8. The host fan according to claim 1, characterized in that: Each of the mounting portions (111) has a first partition wall (1112) around its outer periphery, and a plurality of limiting posts (1113) are evenly arranged around the outer periphery of the first partition wall (1112). Each of the first partition walls (1112) has at least one positioning groove (1114) in a first direction. A second partition wall (1211) is provided around the outer periphery of the first receiving hole (121) of the outer frame (12). The shape of the second partition wall (1211) corresponds to the shape formed by the plurality of limiting posts (1113). A second receiving hole (131) is provided in the middle of the upper cover (13), and the second receiving hole (131) is provided in the middle of the upper cover (13). A third partition wall (1311) is provided on the outer periphery of the 131), and a positioning piece (1312) corresponding to the positioning groove (1114) is provided on the third partition wall (1311); when the base (11) and the outer frame (12) are covered and the upper cover (13) is inserted into the first receiving hole (121), the third partition wall (1311) corresponds to the first partition wall (1112), and the third partition wall (1311) is restricted by multiple limiting posts (1113) and cannot be moved, and is restricted by the positioning piece (1312) being placed in the positioning groove (1114) and cannot be rotated.

9. The host fan according to claim 1, characterized in that: The fan blade assembly (2) includes a blade (21), a cover ring (22), and a cover plate (23). The blade (21) has a base (212) with a ring of positioning holes (211) in the middle. The cover ring (22) has a ring of positioning protrusions (221) to be inserted into the positioning holes (211) so that the cover ring (22) is fixed to the base (212). The cover ring (22) has a positioning platform (222) in the middle. The cover plate (23) covers the positioning platform (222). The upper surface of the cover ring (22) is set as the light-emitting surface, and the upper surface of the cover plate (23) is set as the base surface.

10. The host fan according to any one of claims 1-9, characterized in that: There is an accommodating space between the base (11) and the outer frame (12), and several wires and several light strips are arranged in the accommodating space. The wires supply power to the fan blade assembly (2) and power the light strips to make them light up.

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