Shell and fan

Abstract

The utility model provides a shell and a fan. The shell comprises a front cover and a rear cover. The front cover is provided with a first clamping structure, the rear cover is provided with a second clamping structure, and the first clamping structure is clamped with the second clamping structure, so that the front cover is connected with the rear cover; the first clamping structure is provided with a positioning groove, the second clamping structure is provided with a positioning column, and the positioning groove is matched with the positioning column and used for limiting the first clamping structure and the second clamping structure. The front cover and the rear cover can be assembled into the shell through the first clamping structure and the second clamping structure, the first clamping structure is provided with the positioning groove, the second clamping structure is provided with the positioning column, the positioning groove is matched with the positioning column, and the positioning column is clamped in the positioning groove and used for limiting the first clamping structure and the second clamping structure. The effect of preventing the front cover and the rear cover from rotating in a small range is achieved.

Description

Technical Field

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

[0002] At present, most housings include two housing covers and a clamping structure. The two housing covers are connected by the clamping structure to form a housing. There will be a small rotation between the two housing covers, and the housing assembly is unstable, which easily causes damage to the housing. Summary of the Invention

[0003] The utility model provides a housing and a fan to solve the problems of unstable housing assembly and easy damage in the prior art.

[0004] A housing includes a front cover and a rear cover;

[0005] A first clamping structure is provided on the front cover, a second clamping structure is provided on the rear cover, and the first clamping structure is clamped with the second clamping structure so that the front cover is connected to the rear cover;

[0006] A positioning groove is provided on the first clamping structure, a positioning post is provided on the second clamping structure, and the positioning groove is matched with the positioning post for limiting the first clamping structure and the second clamping structure.

[0007] Preferably, the first clamping structure includes at least two clamping seats arranged at intervals along the circumferential direction of the front cover, the second clamping structure includes at least two clamping buckles arranged at intervals along the circumferential direction of the rear cover, and the clamping seats are clamped with the clamping buckles.

[0008] Preferably, reinforcing members are provided on the outer surfaces of both the front cover and the rear cover; the reinforcing members are provided as honeycomb groove structures; the honeycomb groove structures include a plurality of hexagonal honeycomb grooves, and the plurality of hexagonal honeycomb grooves are uniformly distributed along the circumferential direction of the housing.

[0009] A fan includes a fan main body and the housing;

[0010] The fan main body is installed between the front cover and the rear cover of the housing.

[0011] Preferably, the fan further includes a wind guiding structure, and the wind guiding structure is arranged on the front cover for guiding the wind output by the fan main body.

[0012] Preferably, the front cover includes a first front cover main body;

[0013] The first front cover main body cooperates with the rear cover to form a containing space, and the fan main body is rotatably installed in the containing space;

[0014] The air guiding structure includes a first air guiding structure, and the first air guiding structure is arranged on the outer surface of the first front cover body.

[0015] Preferably, the first air guiding structure includes an air guiding mesh cover and at least two connecting arms;

[0016] The air guiding mesh cover is concentrically arranged with the first front cover body;

[0017] At least two of the connecting arms are arranged at intervals along the circumferential direction of the air guiding mesh cover. One end of the connecting arm is connected to the air guiding mesh cover, and the other end of the connecting arm is connected to the first front cover body.

[0018] Preferably, the front cover includes a second front cover body;

[0019] The second front cover body cooperates with the rear cover to form a containing space, and the fan body is rotatably installed in the containing space;

[0020] The air guiding structure includes a second air guiding structure, and the second air guiding structure is arranged on the outer surface of the second front cover body.

[0021] Preferably, the second air guiding structure includes an air guiding box. The air guiding box is installed on the outer surface of the second front cover body, and the air inlet of the air guiding box corresponds to the middle part of the second front cover body; the air outlet of the air guiding box faces in a direction perpendicular to the direction of the air inlet.

[0022] Preferably, a slope is provided on a part of the second front cover body close to the air outlet of the air guiding box, and the inner thickness of the slope is greater than the outer thickness of the slope; anti-shrinkage holes are arranged at intervals along the circumferential direction on the slope part of the second front cover body.

[0023] The housing provided by the embodiment of the present utility model includes a front cover and a rear cover. A first clamping structure is provided on the front cover, and a second clamping structure is provided on the rear cover. The first clamping structure and the second clamping structure are clamped together, so that the front cover and the rear cover can be assembled into a housing, which is convenient for people to install and disassemble the housing. In addition, a positioning groove is provided on the first clamping structure, and a positioning post is provided on the second clamping structure. The positioning groove and the positioning post are matched, and the positioning post is stuck in the positioning groove to limit the first clamping structure and the second clamping structure, so as to prevent the front cover and the rear cover from rotating slightly, ensure the stable and reliable assembly of the housing, and avoid the housing from shaking and being damaged, affecting the use experience. Description of the Drawings

[0024] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. 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.

[0025] Figure 1 is an axonometric view of the first structure of the housing in an embodiment of the present utility model;

[0026] Figure 2 is an axonometric view of the second structure of the housing in an embodiment of the present utility model;

[0027] Figure 3 is an axonometric view of the rear cover in an embodiment of the present utility model;

[0028] Figure 4 is an axonometric view of the first structure of the front cover in an embodiment of the present utility model;

[0029] Figure 5 is an axonometric view of the first structure of the front cover in an embodiment of the present utility model;

[0030] Figure 6 is a sectional view of the first structure of the housing in an embodiment of the present utility model;

[0031] Figure 7 is a sectional view of the second structure of the housing in an embodiment of the present utility model.

[0032] Wherein, 1, front cover; 11, first front cover body; 12, second front cover body; 2, rear cover; 3, first clamping structure; 4, second clamping structure; 5, positioning groove; 6, positioning post; 7, reinforcing member; 8, fan body; 9, air guiding structure; 91, first air guiding structure; 911, air guiding mesh cover; 912, connecting arm; 92, second air guiding structure; 10, anti-shrinkage hole. Specific embodiments

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] An embodiment of the present utility model provides a housing. Referring to Figures 1-5 , the housing includes a front cover 1 and a rear cover 2; a first clamping structure 3 is provided on the front cover 1, a second clamping structure 4 is provided on the rear cover 2, and the first clamping structure 3 is clamped with the second clamping structure 4 so that the front cover 1 and the rear cover 2 are joined; a positioning groove 5 is provided on the first clamping structure 3, a positioning post 6 is provided on the second clamping structure 4, and the positioning groove 5 matches the positioning post 6 for limiting the first clamping structure 3 and the second clamping structure 4.

[0037] As an example, the housing can be applied to many devices, such as a fan; the housing includes a front cover 1 and a rear cover 2, a first clamping structure 3 is provided on the front cover 1, a second clamping structure 4 is provided on the rear cover 2, and the first clamping structure 3 is clamped with the second clamping structure 4, so that the front cover 1 and the rear cover 2 can be assembled into a housing, which is convenient for people to install and disassemble the housing. In addition, a positioning groove 5 is provided on the first clamping structure 3, a positioning post 6 is provided on the second clamping structure 4, the positioning groove 5 matches the positioning post 6, and the positioning post 6 is stuck in the positioning groove 5 for limiting the first clamping structure 3 and the second clamping structure 4, playing a role in preventing the front cover 1 and the rear cover 2 from rotating slightly, ensuring the stable and reliable assembly of the housing, and avoiding the housing from shaking and being damaged, affecting the use experience.

[0038] In one embodiment, referring to Figures 3-5, the first clamping structure 3 includes at least two clamping seats circumferentially spaced along the front cover 1, and the second clamping structure 4 includes at least two clamping buckles circumferentially spaced along the rear cover 2, and the clamping seats are clamped with the clamping buckles.

[0039] As an example, the first clamping structure 3 includes at least two clamping seats which are circumferentially spaced along the front cover 1, and the second clamping structure 4 includes at least two clamping buckles which are circumferentially spaced along the rear cover 2, and the clamping seats are correspondingly clamped with the clamping buckles; wherein, the clamping seat includes a first main body, and a clamping groove is provided on the first main body; the clamping buckle includes a second main body, and a clamping body is provided on the second main body, and the clamping body is clamped in the clamping groove, so that the front cover 1 and the rear cover 2 can be assembled into a housing, which is convenient for people to install and disassemble the housing. In addition, a positioning groove 5 is provided on the clamping seat, that is, on the first main body, and the positioning groove 5 is spaced from the clamping groove, and a positioning post 6 is provided on the clamping buckle, that is, on the second main body, and the positioning post 6 is spaced from the clamping body, and the positioning groove 5 matches the positioning post 6, and the positioning post 6 is clamped in the positioning groove 5 for limiting the clamping seat and the clamping buckle, so as to prevent the front cover 1 and the rear cover 2 from rotating slightly, ensure the stable and reliable assembly of the housing, and avoid the housing from shaking and being damaged, affecting the use experience.

[0040] In an embodiment, referring to Figure 1 and Figure 2 , reinforcing members 7 are provided on the outer surfaces of both the front cover 1 and the rear cover 2; the reinforcing members 7 are provided in a honeycomb groove structure; the honeycomb groove structure includes a plurality of hexagonal honeycomb grooves, and the plurality of hexagonal honeycomb grooves are evenly distributed along the circumferential direction of the housing.

[0041] As an example, reinforcing members 7 are provided on the outer surfaces of both the front cover 1 and the rear cover 2, and the use of the reinforcing members 7 can improve the support strength of the front cover 1 and the rear cover 2 and improve the safety of the housing. The reinforcing members 7 are provided in a honeycomb groove structure, and the honeycomb groove structure can play a role in strengthening the rigidity of the front cover 1 and the rear cover 2, and at the same time reduce the weight on the premise of ensuring the required rigidity. It is introduced that the honeycomb groove structure includes a plurality of hexagonal honeycomb grooves, and the plurality of hexagonal honeycomb grooves are evenly distributed along the circumferential direction of the housing, which can reduce the weight of the housing as much as possible while enabling the front cover 1 and the rear cover 2 to reach the required rigidity.

[0042] An embodiment of the present utility model provides a fan, referring to Figures 1-7 , including a fan main body 8 and a housing; the fan main body 8 is installed between the front cover 1 and the rear cover 2 of the housing.

[0043] As an example, the fan can be applied in various scenarios to provide wind power, such as on a seat assembly. The fan includes a fan body 8 and a housing. When installed, the front cover 1 and the rear cover 2 of the housing cooperate to form a receiving space, and the fan body 8 is installed in the receiving space. The fan body 8 includes a shaft core, a bearing, a copper tube, a PCBA board, a wire coil, an iron shell, a magnetic strip, and an impeller. The shaft core is installed in the copper tube through the bearing, and the copper tube is installed on the rear cover 2. The PCBA board, the wire coil, and the iron shell are sequentially installed on the copper tube. The magnetic strip is arranged on the iron shell, and then the impeller is installed at one end of the shaft core and sleeved outside the iron shell. The housing includes a front cover 1 and a rear cover 2. A first clamping structure 3 is provided on the front cover 1, and a second clamping structure 4 is provided on the rear cover 2. The first clamping structure 3 is clamped with the second clamping structure 4, and the front cover 1 and the rear cover 2 can be assembled into the housing, which facilitates the installation and disassembly of the housing by people. In addition, a positioning groove 5 is provided on the first clamping structure 3, and a positioning post 6 is provided on the second clamping structure 4. The positioning groove 5 matches the positioning post 6, and the positioning post 6 is stuck in the positioning groove 5 to limit the first clamping structure 3 and the second clamping structure 4, preventing the front cover 1 and the rear cover 2 from rotating slightly, ensuring the stable and reliable assembly of the housing, and avoiding the housing from shaking and being damaged, which affects the use experience.

[0044] In one embodiment, referring to Figure 1 and Figure 2 , the fan further includes a wind guiding structure 9. The wind guiding structure 9 is arranged on the front cover 1 and is used to guide the wind output by the fan body 8.

[0045] As an example, the fan further includes a wind guiding structure 9. The wind guiding structure 9 is arranged on the front cover 1, which can guide the wind output by the fan body 8 to the target position and improve the blowing effect of the fan.

[0046] In one embodiment, referring to Figure 1 and Figure 4 , the front cover 1 includes a first front cover body 11; the first front cover body 11 cooperates with the rear cover 2 to form a receiving space, and the fan body 8 is rotatably installed in the receiving space; the wind guiding structure 9 includes a first wind guiding structure 91, and the first wind guiding structure 91 is arranged on the outer surface of the first front cover body 11.

[0047] As an example, the first structure of the fan is introduced, such as a backrest fan. The front cover 1 includes a first front cover body 11; the first front cover body 11 and the rear cover 2 are clamped through the first clamping structure 3 and the second clamping structure 4 to form the housing of the first structure. A receiving space is formed between the first front cover body 11 and the rear cover 2, and the fan body 8 is rotatably installed in the receiving space; the wind guiding structure 9 includes a first wind guiding structure 91, and the first wind guiding structure 91 is arranged on the outer surface of the first front cover body 11, which can guide the wind output by the fan body 8 to the target position and improve the blowing effect of the fan.

[0048] In one embodiment, referring to Figure 1 and Figure 4 , the first air guiding structure 91 includes an air guiding grille 911 and at least two connecting arms 912; the air guiding grille 911 is concentrically arranged with the first front cover main body 11; the at least two connecting arms 912 are arranged at intervals along the circumferential direction of the air guiding grille 911, one end of the connecting arm 912 is connected to the air guiding grille 911, and the other end of the connecting arm 912 is connected to the first front cover main body 11.

[0049] As an example, the first air guiding structure 91 includes an air guiding grille 911 and at least two connecting arms 912; during installation, the air guiding grille 911 is concentrically arranged with the first front cover main body 11; the at least two connecting arms 912 are arranged at intervals along the circumferential direction of the air guiding grille 911, one end of the connecting arm 912 is connected to the air guiding grille 911, and the other end of the connecting arm 912 is connected to the first front cover main body 11, so that the air guiding area can be enlarged on the premise of ensuring that the first air guiding structure 91 reaches the required support strength, thereby improving the air guiding effect.

[0050] In one embodiment, referring to Figure 2 and Figure 5 , the front cover 1 includes a second front cover main body 12; the second front cover main body 12 cooperates with the rear cover 2 to form a containing space, and the fan main body 8 is rotatably installed in the containing space;

[0051] The air guiding structure 9 includes a second air guiding structure 92, and the second air guiding structure 92 is arranged on the outer surface of the second front cover main body 12.

[0052] As an example, the second structure of the fan is introduced, such as a cushion fan. The front cover 1 includes a second front cover main body 12; the second front cover main body 12 and the rear cover 2 are snap-connected through a first snap-connection structure 3 and a second snap-connection structure 4 to form a housing of the second structure, and a containing space is formed between the second front cover main body 12 and the rear cover 2, and the fan main body 8 is rotatably installed in the containing space; the air guiding structure 9 includes a second air guiding structure 92, and the second air guiding structure 92 is arranged on the outer surface of the second front cover main body 12, which can guide the air output by the fan main body 8 to the target position and improve the air blowing effect of the fan.

[0053] In one embodiment, referring to Figure 2 , Figure 5 and Figure 7 , the second air guiding structure 92 includes an air guiding box, the air guiding box is installed on the outer surface of the second front cover main body 12, and the air inlet of the air guiding box corresponds to the middle part of the second front cover main body 12; the air outlet direction of the air guiding box is perpendicular to the air inlet direction.

[0054] As an example, the second air guiding structure 92 includes an air guiding box. During installation, the air guiding box is installed on the outer surface of the second front cover main body 12. The air inlet of the air guiding box corresponds to the middle part of the second front cover main body 12, and the air outlet of the air guiding box faces perpendicular to the air inlet. Such a setting can change the wind direction output by the fan main body 8 and improve the applicable range of the fan.

[0055] In one embodiment, referring to Figure 5 and Figure 7 , a slope is provided on the part of the second front cover main body 12 close to the air outlet of the air guiding box, and the inner thickness of the slope is greater than the outer thickness of the slope; shrinkage prevention holes 10 are provided at intervals along the circumference on the slope part of the second front cover main body 12.

[0056] As an example, during design, a slope is provided on the part of the second front cover main body 12 close to the air outlet of the air guiding box, and the inner thickness of the slope is greater than the outer thickness of the slope. This can improve the force transmission effect of the part of the second front cover main body 12 close to the air outlet of the air guiding box and prevent the second front cover main body 12 and the air guiding box from deforming under force. Shrinkage prevention holes 10 are provided at intervals along the circumference on the slope part of the second front cover main body 12. The shrinkage prevention holes 10 have the function of absorbing collision energy and can effectively prevent the second front cover main body 12 and the air guiding box from deforming.

[0057] The embodiment of the present utility model provides a seat assembly, including a seat and a fan; the fan is arranged on the seat.

[0058] As an example, the seat assembly includes a seat and a fan; the fan is provided on the seat and can blow air to the seat; for example, when the fan is a backrest fan, it is installed at the seat backrest and can directly blow air to the seat backrest; when the fan is a seat cushion fan, it cannot be directly installed at the seat cushion and can only be installed elsewhere, and the air direction can be changed through an air guide box to blow air to the seat cushion. The fan includes a fan body 8 and a housing. During installation, the front cover 1 and the rear cover 2 of the housing cooperate to form a receiving space, and the fan body 8 is installed in the receiving space. The fan body 8 includes a shaft core, a bearing, a copper tube, a PCBA board, a wire coil, an iron shell, a magnetic strip, and an impeller. The shaft core is installed in the copper tube through the bearing, and the copper tube is installed on the rear cover 2. The PCBA board, the wire coil, and the iron shell are sequentially installed on the copper tube. The magnetic strip is provided on the iron shell, and then the impeller is installed at one end of the shaft core and sleeved outside the iron shell. The housing includes a front cover 1 and a rear cover 2. A first clamping structure 3 is provided on the front cover 1, and a second clamping structure 4 is provided on the rear cover 2. The first clamping structure 3 is clamped with the second clamping structure 4 to assemble the front cover 1 and the rear cover 2 into a housing, which is convenient for people to install and disassemble the housing. In addition, a positioning groove 5 is provided on the first clamping structure 3, and a positioning post 6 is provided on the second clamping structure 4. The positioning groove 5 matches the positioning post 6, and the positioning post 6 is stuck in the positioning groove 5 to limit the first clamping structure 3 and the second clamping structure 4, preventing the front cover 1 and the rear cover 2 from rotating slightly, ensuring the stable and reliable assembly of the housing, and avoiding the housing from shaking and being damaged, which affects the use experience.

[0059] An embodiment of the present invention provides an automobile, which includes a seat assembly.

[0060] As an example, an automobile includes a seat assembly; the seat assembly includes a seat and a fan; the fan is disposed on the seat and can provide blowing for the seat; for example, when the fan is a backrest fan, it is installed at the seat backrest and can directly provide blowing for the seat backrest; when the fan is a seat cushion fan, it cannot be directly installed at the seat cushion and can only be installed elsewhere, and the air direction can be changed through an air guide box to blow towards the seat cushion. The fan includes a fan main body 8 and a housing. During installation, the front cover 1 and the rear cover 2 of the housing cooperate to form an accommodation space, and the fan main body 8 is installed in the accommodation space. The fan main body 8 includes a shaft core, a bearing, a copper tube, a PCBA board, a wire coil, an iron shell, a magnetic strip, and an impeller. The shaft core is installed in the copper tube through the bearing, the copper tube is installed on the rear cover 2, the PCBA board, the wire coil, and the iron shell are sequentially installed on the copper tube, the magnetic strip is disposed on the iron shell, and then the impeller is installed at one end of the shaft core and sleeved outside the iron shell. The housing includes a front cover 1 and a rear cover 2. A first clamping structure 3 is provided on the front cover 1, and a second clamping structure 4 is provided on the rear cover 2. The first clamping structure 3 is clamped with the second clamping structure 4, and the front cover 1 and the rear cover 2 can be assembled into the housing, which facilitates the installation and disassembly of the housing by people. In addition, a positioning groove 5 is provided on the first clamping structure 3, and a positioning post 6 is provided on the second clamping structure 4. The positioning groove 5 matches the positioning post 6, and the positioning post 6 is stuck in the positioning groove 5 to limit the first clamping structure 3 and the second clamping structure 4, preventing the front cover 1 and the rear cover 2 from rotating slightly, ensuring the stable and reliable assembly of the housing, and avoiding the housing from shaking and being damaged, which affects the use experience.

[0061] The above-described embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit 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 described 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 embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A housing, characterized in that: Including front cover and back cover; The front cover is provided with a first clamping structure, and the rear cover is provided with a second clamping structure, and the first clamping structure is clamped with the second clamping structure to connect the front cover with the rear cover; The first clamping structure is provided with a positioning groove, and the second clamping structure is provided with a positioning column. The positioning groove matches the positioning column and is used to limit the first clamping structure and the second clamping structure.

2. The housing according to claim 1, characterized in that The first clamping structure includes at least two clamping seats arranged at intervals along the circumference of the front cover, and the second clamping structure includes at least two buckles arranged at intervals along the circumference of the rear cover, and the clamping seats are clamped with the buckles.

3. The housing according to claim 1, characterized in that The outer surface of the front cover and the outer surface of the rear cover are both provided with reinforcement members; The reinforcement is configured as a honeycomb groove structure; the honeycomb groove structure comprises a plurality of hexagonal honeycomb grooves, and the plurality of hexagonal honeycomb grooves are evenly distributed along the circumference of the shell.

4. A fan, characterized in that: It comprises a fan body and a housing as claimed in any one of claims 1 to 3; The fan body is installed between the front cover and the rear cover of the housing.

5. The fan according to claim 4, characterized in that: The fan further comprises an air guiding structure, which is arranged on the front cover and is used for guiding the wind output by the fan body.

6. The fan according to claim 5, characterized in that: The front cover comprises a first front cover body; The first front cover body cooperates with the rear cover to form an accommodating space, and the fan body can be rotatably installed in the accommodating space; The wind guide structure includes a first wind guide structure, and the first wind guide structure is arranged on the outer surface of the first front cover body.

7. The fan according to claim 6, characterized in that: The first air guide structure includes an air guide mesh cover and at least two connecting arms; The air guide grille is arranged concentrically with the first front cover body; At least two of the connecting arms are arranged at intervals along the circumference of the air guide grille, one end of the connecting arm is connected to the air guide grille, and the other end of the connecting arm is connected to the first front cover body.

8. The fan according to claim 5, characterized in that The front cover comprises a second front cover body; The second front cover body cooperates with the rear cover to form a receiving space, and the fan body can be rotatably installed in the receiving space; The wind guide structure includes a second wind guide structure, and the second wind guide structure is arranged on the outer surface of the second front cover body.

9. The fan according to claim 8, characterized in that The second air guide structure includes an air guide box, which is installed on the outer surface of the second front cover body, and the air inlet of the air guide box corresponds to the middle part of the second front cover body; the air outlet of the air guide box is perpendicular to the direction of the air inlet.

10. The fan according to claim 9, characterized in that The second front cover body is provided with an inclined surface at a portion close to the air outlet of the air guide box, and the inner thickness of the inclined surface is greater than the outer thickness of the inclined surface; the inclined surface portion of the second front cover body is provided with anti-shrinkage holes at intervals along the circumferential direction.

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