A heat dissipation fan and electronic equipment

Abstract

The utility model discloses a heat dissipation fan and electronic equipment for solving the technical problem that the support structure for preventing pressing deformation in the existing heat dissipation fan influences the performance of the heat dissipation fan. The heat dissipation fan of the utility model includes the shell and fan body, and the shell has the installation cavity, and the fan body is installed in the installation cavity, and along the thickness direction of the heat dissipation fan, the surface of the shell away from the fan body is connected with the support protrusion, and the support protrusion extends to the direction away from the fan body. In the above design, the support protrusion is arranged on the surface of the shell away from the fan body, thereby improving the overall strength and deformation resistance of the shell, effectively avoiding the deformation of the heat dissipation fan shell due to pressing, and since the support protrusion is connected to the surface of the shell, it does not affect the installation cavity inside the shell, that is, the strength of the shell is improved without affecting the air flow of the heat dissipation fan, ensuring the heat dissipation performance of the heat dissipation fan.

Description

Technical Field

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

[0002] Thin and light electronic devices are becoming increasingly popular due to their portability. Taking laptops as an example, current laptops generally adopt a thin and light design. As the thickness becomes thinner, when users type or play games, the internal cooling fan of the laptop is easily subjected to external force, which can cause slight deformation of the shell structure. When the pressure reaches a certain level, the deformed shell comes into contact with the fan blades, thereby generating noise or damaging the fan blades.

[0003] Currently, to overcome the above problems, cooling fans are designed with a support structure to strengthen the outer shell and prevent deformation under pressure. However, since this support structure is specifically designed inside the cooling fan, it involves adding a support column between the upper and lower shells of the fan. Because this support column encroaches on the internal space of the cooling fan, it causes airflow loss and severely reduces the cooling fan's performance. Alternatively, some existing technologies use protrusions on the surface of the cooling fan shell to strengthen it. However, since the protrusions are connected to the internal space of the shell, this effectively increases the internal space, also causing airflow loss and severely impacting cooling fan performance. Both of these designs clearly do not meet the higher cooling requirements of today's thin and light laptops.

[0004] Therefore, finding a technical solution that can solve the above-mentioned technical problems has become an important research topic for those skilled in the art. Utility Model Content

[0005] This utility model discloses a cooling fan and electronic device, which solves the technical problem that the support structure used to prevent deformation by pressing in existing cooling fans affects the performance of the cooling fan.

[0006] The present invention provides a cooling fan, including a housing and a fan body. The housing has a mounting cavity, and the fan body is installed in the mounting cavity. Along the thickness direction of the cooling fan, a support protrusion is connected to the surface of the housing away from the fan body, and the support protrusion extends in a direction away from the fan body.

[0007] Optionally, the outer casing includes a third housing and a first housing and a second housing disposed opposite to each other along the thickness direction of the cooling fan. The first housing and the second housing are connected through the third housing, and the third housing has an air outlet communicating with the mounting cavity.

[0008] The support protrusion is thermally fused to the surface of the first housing and / or the second housing away from the fan body.

[0009] Optionally, the support protrusion is a point-shaped support protrusion, which is fixed to the first housing and / or the second housing by a single hot-melt column.

[0010] Optionally, the support protrusion is a strip-shaped support protrusion, which is fixed to the first housing and / or the second housing by multiple hot-melt pillars.

[0011] Optionally, the first housing is provided with an air inlet communicating with the mounting cavity, and the support protrusion is heat-fused and fixed to the first housing near the air outlet. The support protrusion is used to block the airflow from the air outlet back to the air inlet of the first housing.

[0012] Alternatively, the second housing is provided with an air inlet communicating with the mounting cavity, and the support protrusion is heat-fused and fixed to the second housing near the air outlet. The support protrusion is used to block the airflow from the air outlet back to the air inlet of the second housing.

[0013] Alternatively, both the first housing and the second housing are provided with air inlets communicating with the mounting cavity, and the first housing and the second housing are both heat-fused and fixed with the support protrusion near the air outlet. The support protrusion is used to block the airflow from the air outlet back to the air inlets of the first housing and the second housing.

[0014] Optionally, the air outlet includes a main air outlet and an auxiliary air outlet with different air outlet directions;

[0015] The support protrusion has a first support sub-protrusion and a second support sub-protrusion. The first support sub-protrusion is located near the main air outlet, and the second support sub-protrusion is located near the auxiliary air outlet. The first support sub-protrusion and the second support sub-protrusion are connected to each other to form the support protrusion, thereby blocking the airflow from the main air outlet and the auxiliary air outlet back to the air inlet.

[0016] Optionally, the support protrusion is a ring-shaped support protrusion, which is fixed to the first housing and / or the second housing by multiple hot-melt pillars.

[0017] Optionally, the first housing is provided with an air inlet communicating with the mounting cavity, and the first housing is hot-melt fixed with a support protrusion around the air inlet, the support protrusion being used to block the airflow flowing back from the air outlet to the air inlet of the first housing;

[0018] Alternatively, the second housing is provided with an air inlet communicating with the mounting cavity, and the second housing is hot-melt fixed with the support protrusion surrounding the air inlet, the support protrusion being used to block the airflow flowing back from the air outlet to the air inlet of the second housing;

[0019] Alternatively, both the first housing and the second housing are provided with an air inlet communicating with the mounting cavity. The first housing is hot-melt fixed with a support protrusion surrounding the air inlet, and the second housing is hot-melt fixed with a support protrusion surrounding the air inlet. The support protrusion is used to block the airflow from the air outlet back to the air inlets of the first housing and the second housing.

[0020] Optionally, the support protrusion is a resilient plastic part.

[0021] The present invention provides an electronic device including the aforementioned cooling fan.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In this utility model's cooling fan, a support protrusion is connected to the surface of the outer casing away from the fan body, and the support protrusion extends in a direction away from the fan body. In this design, the support protrusion is located on the surface of the outer casing away from the fan body, thereby improving the overall strength and deformation resistance of the outer casing, effectively preventing deformation of the cooling fan casing under pressure. Furthermore, since the support protrusion is connected to the surface of the outer casing, it does not affect the internal mounting cavity volume of the outer casing. This achieves improved casing strength without affecting the airflow of the cooling fan, ensuring its heat dissipation performance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of a dotted support protrusion hot-melted and fixed on the first housing of a cooling fan provided by this utility model;

[0026] Figure 2 A schematic diagram of a strip-shaped support protrusion that is thermally fused to the first housing of a cooling fan provided by this utility model;

[0027] Figure 3A schematic diagram of a cooling fan in which a first support protrusion and a second support protrusion are hot-melted and fixed on the first housing.

[0028] Figure 4 A schematic diagram of a dotted support protrusion hot-melted and fixed on the second housing of a cooling fan provided by this utility model;

[0029] Figure 5 A schematic diagram of a strip-shaped support protrusion that is thermally fused to the second housing of a cooling fan provided by this utility model;

[0030] Figure 6 A schematic diagram of a cooling fan in which a first support protrusion and a second support protrusion are thermally fused to the second housing.

[0031] Illustration: First housing 1; Second housing 2; Third housing 3; Air outlet 4; Main air outlet 401; Auxiliary air outlet 402; Air inlet 5; Support protrusion 6; First support protrusion 601; Second support protrusion 602; Fan body 7; Thickness direction X of the cooling fan. Detailed Implementation

[0032] This utility model discloses a cooling fan and electronic device, which solves the technical problem that the support structure used to prevent deformation by pressing in existing cooling fans affects the performance of the cooling fan.

[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 6 The present invention provides a cooling fan, including a housing and a fan body 7. The housing has a mounting cavity, and the fan body 7 is mounted in the mounting cavity. Along the thickness direction of the cooling fan, a support protrusion 6 is connected to the surface of the housing away from the fan body 7, and the support protrusion 6 extends in a direction away from the fan body 7.

[0035] It should be noted that the outer shell in this embodiment is made of metal or alloy material. Therefore, in order to connect the support protrusion 6 to the outer shell, this embodiment preferably connects the support protrusion 6 to the outer shell by heat fusion fixation, so that the support protrusion 6 will not affect the internal volume of the mounting cavity, thereby ensuring that the airflow of the cooling fan meets the heat dissipation requirements.

[0036] In addition, in the hot-melt process, firstly, holes are made at the positions of the support protrusions 6 that need to be hot-melted on the outer shell, then the hot-melt column is inserted into the holes, and then the support protrusions 6 are hot-melted and fixed on the outer shell by hot-melt equipment such as hot-melt guns.

[0037] In this utility model's cooling fan, a support protrusion 6 is connected to the surface of the outer casing away from the fan body 7, and the support protrusion 6 extends in a direction away from the fan body 7. In the above design, the support protrusion 6 is located on the surface of the outer casing away from the fan body 7, thereby improving the overall strength and deformation resistance of the outer casing, effectively preventing the cooling fan casing from deforming under pressure. Furthermore, since the support protrusion 6 is connected to the surface of the outer casing, it does not affect the internal mounting cavity volume of the outer casing. That is, while improving the strength of the outer casing, it does not affect the airflow of the cooling fan, ensuring the cooling performance of the cooling fan.

[0038] Furthermore, in this embodiment, the outer casing of the cooling fan specifically includes a third housing 3 and a first housing 1 and a second housing 2 disposed opposite to each other along the thickness direction of the cooling fan. The first housing 1 and the second housing 2 are connected through the third housing 3, and the third housing 3 has an air outlet 4 communicating with the mounting cavity.

[0039] The support protrusion 6 is heat-fused to the surface of the first housing 1 and / or the second housing 2 away from the fan body 7.

[0040] In addition, in this embodiment, the first housing 1 is specifically located above the second housing 2. It can be simply understood that the first housing 1 is essentially the top housing of the cooling fan, and the second housing 2 is essentially the bottom housing of the cooling fan.

[0041] The aforementioned cooling fan can be specifically applied to a laptop computer. The laptop computer has a C-shell (the shell where the keyboard is located) and a D-shell (the bottom shell). The C-shell and D-shell constitute a cavity for installing control components such as the motherboard and the cooling fan. The first shell 1 of the aforementioned cooling fan corresponds to the C-shell, and the second shell 2 corresponds to the D-shell.

[0042] Since the gap between the first housing 1 and the C housing is small, the height of the support protrusion 6 on the first housing 1 should be controlled below 0.5mm. This design can ensure that the support protrusion 6 can enhance the strength and resistance to deformation of the housing, and the support protrusion 6 can support the C housing when it is pressed, so as to prevent the pressure from being applied to the fan housing through the C housing, thereby causing the fan housing to contact the fan body 7 and causing abnormal noise.

[0043] In addition, due to the thin and light design of the laptop, the gap between the second shell 2 and the D shell is also small. Therefore, the height of the support protrusion 6 on the second shell 2 should be controlled at 1-2mm. This design can ensure that the support protrusion 6 can enhance the strength and anti-deformation performance of the shell, and the support protrusion 6 can support the D shell when it is pressed, so as to prevent the pressure from being applied to the fan shell through the D shell, which would cause the fan shell to contact the fan body 7 and cause abnormal noise.

[0044] It should be noted that, as Figures 1 to 3 As shown, in one specific embodiment of the above embodiments, only the first housing 1 is hot-melted and fixed with a support protrusion 6. This design is applicable to situations where the gap between the C-shell and the first housing 1 is small. By hot-melting and fixing the support protrusion 6 on the first housing 1, the situation where the gap between the first housing 1 and the C-shell is too small, causing the user to easily cause the first housing 1 to deform when typing on the keyboard, can be avoided.

[0045] like Figures 4 to 6 As shown, in the second specific embodiment of the above embodiment, only the second housing 2 is hot-melted and fixed with a support protrusion 6. This design is applicable to situations where the gap between the D housing and the second housing 2 is small. By hot-melting and fixing the support protrusion 6 on the second housing 2, the situation where the gap between the second housing 2 and the D housing is too small, causing the second housing 2 to be deformed by pressing during the user's placement or use of the laptop, can be avoided.

[0046] In the third specific embodiment of the above embodiments, the first housing 1 and the second housing 2 are simultaneously heat-fused and fixed with the above-mentioned support protrusion 6, which can effectively avoid the situation mentioned in the first and second specific embodiments.

[0047] Furthermore, the support protrusion 6 in this embodiment has various shapes and structures, such as Figure 1 and Figure 4 As shown, in one specific embodiment of this example, the support protrusion 6 is specifically a point-shaped support protrusion 6, which is fixed to the first housing 1 and / or the second housing 2 by a single hot-melt column.

[0048] It should be noted that the cross-section of the support protrusion 6 of the above-mentioned dot-shaped structure can be circular, elliptical, square, triangular, etc., and this embodiment does not impose any restrictions on it.

[0049] In addition, it should be noted that since the cross-sectional area of ​​the support protrusion 6 of the above-mentioned point-type structure is small, under normal circumstances, the first housing 1 and / or the second housing 2 need to be fixed by heat fusion for multiple support protrusions 6 of the point-type structure, and each support protrusion 6 of the point-type structure can be fixed to the first housing 1 and / or the second housing 2 by only a single heat fusion column. The diameter of the heat fusion column is recommended to be 0.2-0.3mm.

[0050] like Figure 2 , Figure 3 , Figure 5 as well as Figure 6 As shown, in another specific embodiment of this example, the support protrusion 6 is a strip-shaped support protrusion 6, which is fixed to the first housing 1 and / or the second housing 2 by multiple hot-melt columns.

[0051] It should be noted that the aforementioned strip-shaped support protrusion 6 can specifically be a cuboid strip structure or an arc-shaped strip structure; this embodiment does not impose any limitation on this. Furthermore, it should be noted that since the aforementioned strip-shaped support protrusion 6 has a certain length, in order to stably fix the strip-shaped support protrusion 6 to the first housing 1 and / or the second housing 2, it generally needs to be fixed by multiple hot-melt pillars. The recommended diameter of the hot-melt pillars is 0.2-0.3 mm.

[0052] Furthermore, in a specific embodiment of the aforementioned strip-shaped support protrusion 6, such as... Figure 3 As shown, the first housing 1 is provided with an air inlet 5 communicating with the mounting cavity. The first housing 1 is heat-fused and fixed with the support protrusion 6 near the air outlet 4. The support protrusion 6 is used to block the airflow from the air outlet 4 back to the air inlet 5 of the first housing 1.

[0053] Or, such as Figure 6 As shown, the second housing 2 is provided with an air inlet 5 communicating with the mounting cavity. The second housing 2 is heat-fused and fixed with the support protrusion 6 near the air outlet 4. The support protrusion 6 is used to block the airflow from the air outlet 4 back to the air inlet 5 of the second housing 2.

[0054] Alternatively, both the first housing 1 and the second housing 2 are provided with an air inlet 5 communicating with the mounting cavity, and the first housing 1 and the second housing 2 are both heat-fused and fixed with the support protrusion 6 near the air outlet 4. The support protrusion 6 is used to block the airflow from the air outlet 4 back to the air inlet 5 of the first housing 1 and the second housing 2.

[0055] It should be noted that, through the above design, the support protrusion 6 of the strip structure not only strengthens the shell and improves its resistance to deformation, but also acts as a windbreak, effectively preventing the airflow blown out from the air outlet 4 from flowing back to the air inlet 5, thus ensuring the heat dissipation performance of the cooling fan.

[0056] In addition, such as Figure 4 and Figure 6 As shown, in the above specific embodiment, the air outlet 4 specifically includes a main air outlet 401 and an auxiliary air outlet 402 with different air outlet directions.

[0057] Specifically, the auxiliary air outlet 402 is located to one side of the main air outlet 401, and the air outlet directions of the two are perpendicular to each other in the same horizontal plane.

[0058] The support protrusion 6 has a first support sub-protrusion 601 and a second support sub-protrusion 602. The first support sub-protrusion 601 is located near the main air outlet 401, and the second support sub-protrusion 602 is located near the auxiliary air outlet 402. The first support sub-protrusion 601 and the second support sub-protrusion 602 are connected to each other to form the support protrusion 6, thereby blocking the airflow from the main air outlet 401 and the auxiliary air outlet 402 back to the air inlet 5.

[0059] It should be noted that, through the above design, the first support protrusion 601 can block the airflow blown out from the main air outlet 401 from flowing back to the air inlet 5, and the second support protrusion 602 can block the airflow blown out from the auxiliary air outlet 402 from flowing back to the air inlet 5.

[0060] Additionally, it should be noted that in the above specific embodiment, the first support protrusion 601 and the second support protrusion 602 are perpendicular to each other on the same horizontal plane to form a windbreak. Specifically, the first support protrusion 601 should be located within 5mm of the main air outlet 401, and the second support protrusion 602 should be located within 5mm of the auxiliary air outlet 402. The length of the second support protrusion 602 should be greater than the length of the auxiliary air outlet 402.

[0061] Furthermore, in another specific embodiment of this example, the support protrusion 6 is a ring-shaped support protrusion 6, which is fixed to the first housing 1 and / or the second housing 2 by multiple hot-melt pillars.

[0062] It should be noted that the aforementioned annular support protrusion 6 can specifically be a circular annular structure or a square annular structure, and this embodiment does not impose any limitation on this. Furthermore, it should be noted that since the aforementioned annular support protrusion 6 has a certain length, in order to stably fix the annular support protrusion 6 to the first housing 1 and / or the second housing 2, it generally needs to be fixed by multiple hot-melt pillars, and the diameter of the hot-melt pillars is recommended to be 0.2-0.3 mm.

[0063] Furthermore, in a specific embodiment of the above-mentioned annular support protrusion 6, the first housing 1 is provided with an air inlet 5 communicating with the mounting cavity, and the first housing 1 is hot-melt fixed with a support protrusion 6 surrounding the air inlet 5. The support protrusion 6 is used to block the airflow from the air outlet 4 back to the air inlet 5 of the first housing 1.

[0064] Alternatively, the second housing 2 is provided with an air inlet 5 communicating with the mounting cavity, and the second housing 2 is hot-melt fixed with the support protrusion 6 surrounding the air inlet 5. The support protrusion 6 is used to block the airflow from the air outlet 4 back to the air inlet 5 of the second housing 2.

[0065] Alternatively, both the first housing 1 and the second housing 2 are provided with an air inlet 5 communicating with the mounting cavity. The first housing 1 is heat-fused to a support protrusion 6 surrounding the air inlet 5, and the second housing 2 is heat-fused to a support protrusion 6 surrounding the air inlet 5. The support protrusion 6 is used to block the airflow from the air outlet 4 back to the air inlet 5 of the first housing 1 and the second housing 2.

[0066] It should be noted that, through the above design, the ring-shaped support protrusion 6 not only strengthens the shell and improves its resistance to deformation, but also acts as a windbreak, effectively preventing the airflow blown out from the air outlet 4 from flowing back to the air inlet 5, thus ensuring the heat dissipation performance of the cooling fan.

[0067] Furthermore, to further enhance the shell's resistance to deformation, the support protrusion 6 in this embodiment is preferably made of elastic plastic.

[0068] It should be noted that, through the above design, since the plastic parts have a certain degree of elasticity, when the support protrusion 6 is subjected to external pressure, it can convert part of the pressure into elastic force, which plays a certain buffering role, thereby reducing the impact of external pressure on the shell and further improving the shell's resistance to deformation.

[0069] In another specific embodiment, the surface of the support protrusion 6 away from the outer shell is covered with a cushioning pad.

[0070] It should be noted that, in this specific embodiment, the buffer pad can be a silicone pad or a rubber pad. When subjected to external pressure, the buffer pad can also convert the pressure into elasticity, thereby playing a certain buffering role, minimizing the impact of external pressure on the outer shell, and further improving the outer shell's resistance to deformation.

[0071] Furthermore, the above content specifically describes the structure of a cooling fan provided in this utility model embodiment. The following will use a set of experimental comparisons to verify that the housing of the cooling fan in this embodiment has good pressure resistance and airflow performance.

[0072] Comparative Example 1: As described in the background section, two support columns are designed inside the housing of the cooling fan to support the first housing 1 and the second housing 2 of the cooling fan, and the first housing 1 and the second housing 2 are designed with protrusions that are connected to the inside of the housing.

[0073] Comparative Example 2: No support structure (such as support pillars or protrusions) was designed in the cooling fan.

[0074] Example 1: One dot-shaped support protrusion 6 is provided on both the first housing 1 and the second housing 2 of the cooling fan.

[0075] Example 2: A strip-shaped support protrusion 6 is provided on the first housing 1 and the second housing 2 of the cooling fan, with a quantity of 1.

[0076]

[0077] Table 1

[0078] The comparative analysis in Table 1 above shows that the cooling fans in Examples 1 and 2 have better strength and resistance to deformation than the cooling fan in Comparative Example 2, and the airflow and static pressure performance of the cooling fans in Examples 1 and 2 are better than those of the cooling fan in Comparative Example 1.

[0079] Please see Figures 1 to 6 An electronic device provided in this embodiment of the present invention includes the cooling fan described above.

[0080] It should be noted that the aforementioned electronic device may specifically be a laptop computer, etc. This embodiment does not limit this. The aforementioned cooling fan is specifically located in the cavity formed between the C shell (the shell where the keyboard is located) and the D shell (the bottom shell) of the laptop computer.

[0081] In the electronic device of this invention, a support protrusion 6 is connected to the surface of the cooling fan housing away from the fan body 7, and the support protrusion 6 extends in a direction away from the fan body 7. In the above design, the support protrusion 6 is located on the surface of the housing away from the fan body 7, thereby improving the overall strength and deformation resistance of the housing, effectively preventing the cooling fan housing from deforming under pressure, and since the support protrusion 6 is connected to the surface of the housing, it does not affect the internal mounting cavity volume of the housing. That is, it improves the strength of the housing without affecting the airflow of the cooling fan, ensuring the cooling performance of the cooling fan.

[0082] The above provides a detailed description of a cooling fan and electronic device provided by this utility model. For those skilled in the art, based on the ideas of the embodiments of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cooling fan, comprising a housing and a fan body (7), wherein the housing has a mounting cavity, and the fan body (7) is mounted within the mounting cavity, characterized in that, Along the thickness direction of the cooling fan, a support protrusion (6) is connected to the surface of the outer casing away from the fan body (7), and the support protrusion (6) extends in a direction away from the fan body (7).

2. The cooling fan according to claim 1, characterized in that, The outer casing includes a third housing (3) and a first housing (1) and a second housing (2) disposed opposite to each other along the thickness direction of the cooling fan. The first housing (1) and the second housing (2) are connected through the third housing (3). The third housing (3) has an air outlet (4) communicating with the mounting cavity. The support protrusion (6) is heat-fused to the surface of the first housing (1) and / or the second housing (2) away from the fan body (7).

3. The cooling fan according to claim 2, characterized in that, The support protrusion (6) is a point-shaped support protrusion (6), which is fixed to the first housing (1) and / or the second housing (2) by a single hot-melt column.

4. The cooling fan according to claim 2, characterized in that, The support protrusion (6) is a strip-shaped support protrusion (6), which is fixed to the first shell (1) and / or the second shell (2) by multiple hot-melt columns.

5. The cooling fan according to claim 4, characterized in that, The first housing (1) is provided with an air inlet (5) communicating with the mounting cavity. The first housing (1) is heat-fused to a support protrusion (6) near the air outlet (4). The support protrusion (6) is used to block the airflow from the air outlet (4) back to the air inlet (5) of the first housing (1). Alternatively, the second housing (2) is provided with an air inlet (5) communicating with the mounting cavity, and the second housing (2) is heat-fused to a position near the air outlet (4) with the support protrusion (6), which is used to block the airflow from the air outlet (4) back to the air inlet (5) of the second housing (2); Alternatively, both the first housing (1) and the second housing (2) are provided with an air inlet (5) communicating with the mounting cavity. The first housing (1) and the second housing (2) are both heat-fused and fixed with the support protrusion (6) near the air outlet (4). The support protrusion (6) is used to block the airflow from the air outlet (4) back to the air inlet (5) of the first housing (1) and the second housing (2).

6. The cooling fan according to claim 5, characterized in that, The air outlet (4) includes a main air outlet (401) and an auxiliary air outlet (402) with different air outlet directions. The support protrusion (6) has a first support sub-protrusion (601) and a second support sub-protrusion (602). The first support sub-protrusion (601) is located near the main air outlet (401), and the second support sub-protrusion (602) is located near the auxiliary air outlet (402). The first support sub-protrusion (601) and the second support sub-protrusion (602) are connected to each other to form the support protrusion (6), thereby blocking the airflow from the main air outlet (401) and the auxiliary air outlet (402) back to the air inlet (5).

7. The cooling fan according to claim 2, characterized in that, The support protrusion (6) is a ring-shaped support protrusion (6), which is fixed to the first shell (1) and / or the second shell (2) by multiple hot-melt columns.

8. The cooling fan according to claim 7, characterized in that, The first housing (1) is provided with an air inlet (5) communicating with the mounting cavity. The first housing (1) is hot-melted and fixed with a support protrusion (6) around the air inlet (5). The support protrusion (6) is used to block the airflow from the air outlet (4) back to the air inlet (5) of the first housing (1). Alternatively, the second housing (2) is provided with an air inlet (5) communicating with the mounting cavity, and the second housing (2) is hot-melt fixed with the support protrusion (6) surrounding the air inlet (5), the support protrusion (6) being used to block the airflow from the air outlet (4) back to the air inlet (5) of the second housing (2); Alternatively, both the first housing (1) and the second housing (2) are provided with an air inlet (5) communicating with the mounting cavity. The first housing (1) is heat-fused to a support protrusion (6) surrounding the air inlet (5), and the second housing (2) is heat-fused to a support protrusion (6) surrounding the air inlet (5). The support protrusion (6) is used to block the airflow from the air outlet (4) back to the air inlet (5) of the first housing (1) and the second housing (2).

9. The cooling fan according to claim 1, characterized in that, The support protrusion (6) is an elastic plastic part.

10. An electronic device, characterized in that, Includes the cooling fan as described in any one of claims 1 to 9.

Images