TWI834561B - Fan module and heat dissipation device - Google Patents

Abstract

The application discloses a fan module installed at an end of an electronic device along an insertion direction for heat dissipation of the electronic device. The fan module includes a mounting bracket, a fan and a one-way shutter are detachably installed in the mounting bracket. The fan is configured to generate airflow along or opposite to the insertion direction, and the one-way shutter allows the airflow to pass through. The fan is configured to generate airflow in an opposite direction by being turned over, and the one-way shutter allows the airflow in the opposite direction to pass through by being turned over correspondingly. The one-way shutter includes a shutter base defining multiple guide holes, a baffle, and multiple float balls in the guide holes for allowing or preventing air to pass through the guide holes to achieve one-way pass function. Then the fan module can switch air direction for different environment, and the one-way shutter prevents air of unwanted direction to pass through. A heat dissipation device comprising the fan module is also provided.

Description

Fan module and cooling device

This application relates to a heat dissipation device for electronic equipment, specifically a fan module and a heat dissipation device.

Switches usually require more than two fan modules for heat dissipation. Previous switches include hot air exhaust switches and cold air intake switches. For different types of switches, fans need to blow air in different directions to ensure that the heat dissipation direction of the switch is consistent with other devices. In addition, the previous switch fan modules did not have an anti-backwind device. This may cause that when a fan module fails and cannot work, the hot air that has been discharged will be sucked back into the switch by the inactive fan, causing interference. The heat dissipation condition of the entire switch, and when used in some special occasions, such as when used outdoors, the air may contain dust, sludge, or flying insects. If accidentally sucked in by the fan, it may also affect the normal operation of the internal components of the switch. and heat dissipation.

In view of the above situation, it is necessary to provide a fan module that is used to provide airflow in different directions for electronic equipment to dissipate heat, and can prevent the airflow from reversing.

According to one aspect of the present application, an embodiment of the present application provides a fan module that is installed on one end of an electronic device along the plugging direction to dissipate heat from the electronic device. The fan module includes a mounting bracket, a fan and an air blocking shutter, wherein the mounting bracket is used to dissipate heat from the electronic device. To connect electronic equipment, the installation frame is provided with a wind shutter installation area and a fan installation area in sequence along the plugging direction; the fan is detachably installed in the fan installation area of the installation frame, and the air supply direction of the fan The direction is the same as or opposite to the plugging direction; the wind-blocking shutter is detachably installed in the wind-blocking shutter installation area of the mounting frame. The wind-blocking shutter has an air outlet side and an air inlet side opposite to the air outlet side to allow airflow along the The direction of the wind inlet side to the wind outlet side passes through the wind blocking shutter. The wind blocking shutter includes a wind blocking base, a plurality of floating balls and a baffle. The wind blocking base is provided with a plurality of air guide holes that penetrate the wind blocking base. , each air guide hole includes an air inlet located on the air inlet side and an air outlet located on the air outlet side. The diameter of the air inlet is smaller than the diameter of the air outlet; each floating ball is correspondingly accommodated in an air guide hole. The diameter of the float is larger than the diameter of the air inlet and smaller than the diameter of the air outlet; the baffle is located on the side of the wind blocking base close to the wind outlet side, and the baffle is provided with a plurality of through holes, each of which faces the wind blocking base. The hole wall between the air guide hole on the air guide hole and the adjacent air guide hole; wherein, when the air flow enters the wind blocking shutter from the wind inlet side, the floating ball is blown to the air outlet by the air flow, and abuts against the baffle, and the air guide hole An airflow channel is formed between the inner wall and the float to allow airflow to pass; when the airflow enters the wind blocking shutter from the outlet side, the float is blown to the air inlet by the airflow and blocks the air inlet to close the airflow channel.

In other embodiments, each air guide hole is provided with a flange protruding from the inner wall of the air guide hole on the air inlet side, and the flange forms the air inlet.

In other embodiments, the inner wall of the flange is in the shape of an arc that is concave inward.

In other embodiments, the wind blocking base includes a base plate and a side wall perpendicular to the base plate. The side walls form a plurality of grilles, and each grille is formed as an air guide hole. The float ball is accommodated in the grille, and the base plate corresponds to a plurality of grilles. The grille is formed with a plurality of openings, and each opening is formed as an air inlet of the air guide hole; each through hole on the baffle is facing the intersection of the side wall and the side wall on the wind blocking base.

In other embodiments, the wind-blocking shutter further includes a filter, which is detachably inserted into the wind-blocking base and is located on the wind inlet side of the wind-blocking base.

In other embodiments, the wind blocking base is provided with a plurality of brackets, and the filter is inserted into the wind blocking base through the brackets.

In other embodiments, the installation frame includes a base, and the wind shutter installation area and the fan installation area are located on the base; the installation frame also includes an outer wall of the wind shutter installation area facing away from the fan installation area and an outer wall located on the fan installation area. The installation area is away from the inner wall of the wind shutter installation area, and the outer wall and the inner wall are connected to the base; the inner wall is provided with a guide slope, and the guide slope forms an acute angle with the base; the inner wall is also provided with two guide plates, two The guide plates are respectively provided at the opposite ends of the inner wall and are inclined toward each other; a guide groove is provided on the side of the base away from the fan, and the guide groove is provided at an end of the base close to the inner wall and extends toward the outer wall; the guide slope, the guide plate and The guide groove is used to guide the fan module into place when the fan module is installed on the electronic device.

In other embodiments, a wiring groove is provided on the inner wall, and the wiring groove is used to accommodate the wiring terminals of the fan.

In other embodiments, the mounting bracket is provided with a locking piece near the outer wall. The locking piece is elastically connected to the mounting frame. The locking piece is provided with a snap-in portion. The snap-in portion is used to fix the fan module after the fan module is installed in place. .

When using the fan module provided by this application, first determine the required air outlet direction according to the installation environment of the fan module. For example, the fan module needs to be installed in a cold-air intake switch and needs to generate airflow from the outer wall to the inner wall to provide external cold air to the switch to dissipate heat. Then install the fan so that the air supply direction is the same as the plugging direction, corresponding to Ground, the choke shutter is installed with the air outlet side facing the fan to allow the airflow to pass through the choke shutter and the fan in sequence and enter the cold air suction switch to supply external cold air for heat dissipation. Or, if the fan module needs to be installed in a heat-exhaust switch and needs to generate airflow from the inner wall to the outer wall to exhaust the hot air generated in the switch for heat dissipation, install the fan with the air supply direction opposite to the plugging direction. , Correspondingly, the wind-blocking shutter is installed with the air inlet side facing the fan, so as to allow the airflow to pass through the fan and the wind-blocking shutter in sequence, and discharge the hot air in the hot exhaust switch. When the fan is turned off, and the air flow direction is different from the air flow direction allowed by the wind-blocking shutter, the float blocks the air inlet of the air guide hole due to the pressure difference on both sides of the fan module, closes the air flow channel, and blocks the air flow from passing through, thus preventing Interference from airflow in different directions.

According to the second aspect of the present application, an embodiment of the present application further provides a heat dissipation device suitable for hot air exhaust switches and cold air suction switches, which includes the fan module as described in the above embodiment.

100:Fan module

10:Mounting rack

11:Wind shutter installation area

12: Fan installation area

13: Base

131:Guide groove

14:Outer wall

15:Inner wall

151: Guide slope

152: Guide plate

153: Wiring slot

16:Lock firmware

161:Clamping part

20:Fan

30: wind shutter

30a: Outlet side

30b: wind inlet side

31: Wind blocking base

311:Substrate

312:Side wall

313: Grille

314:Open your mouth

32: Float

33:Baffle

34: Air guide hole

34a:Air outlet

34b:Air inlet

35:Through hole

36:Flange

37:Filter

38:Bracket

39: Marking pieces

40: Upper cover

41:Indicator window

A:Plug direction

B: Air supply direction

Figure 1 is a schematic three-dimensional structural diagram of a fan module according to an embodiment of the present application.

FIG. 2 is an exploded structural diagram of the wind blocking shutter of the fan module shown in FIG. 1 .

FIG. 3 is a front view of the wind blocking shutter of the fan module shown in FIG. 1 .

FIG. 4A is a cross-sectional view taken along IV-IV in the open state of the wind-blocking shutter of the fan module in FIG. 3 .

FIG. 4B is a cross-sectional view of the wind-blocking shutter of the fan module in FIG. 3 taken along IV-IV in a closed state.

FIG. 5 is a schematic structural diagram of the wind-blocking base of the wind-blocking shutter shown in FIG. 2 .

FIG. 6 is a schematic structural diagram of the mounting bracket of the fan module shown in FIG. 1 .

FIG. 7A is a schematic assembly diagram of the fan module shown in FIG. 1 when the air supply direction of the fan is the same as the insertion direction.

FIG. 7B is a schematic assembly diagram of the fan module shown in FIG. 1 when the air supply direction of the fan is opposite to the insertion direction.

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

Each embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1 and 2, an embodiment of the present application provides a fan module 100, which is installed on one end of an electronic device (not shown) along the insertion direction A to dissipate heat from the electronic device. The fan module 100 It includes a mounting bracket 10, a fan 20 and a wind blocking shutter 30 located in the mounting bracket 10.

Among them, the mounting bracket 10 is used to connect electronic equipment. The mounting bracket 10 is arranged in sequence along the plug-in direction A. A wind blocking shutter installation area 11 and a fan installation area 12 are provided.

The fan 20 is detachably installed in the fan installation area 12 of the mounting bracket, and the air supply direction B of the fan 20 is the same as or opposite to the insertion direction A.

The wind-blocking shutter 30 is detachably installed in the wind-blocking shutter installation area 11 of the mounting frame 10. The wind-blocking shutter 30 has an air outlet side 30a and an air inlet side 30b opposite to the air outlet side to allow airflow along the air inlet side. 30b passes through the wind blocking shutter 30 in the direction of the air outlet side 30a. Specifically, the wind blocking shutter 30 includes a wind blocking base 31, a plurality of floating balls 32 and a baffle 33. As shown in Figure 3, Figure 4A and Figure 4B, the wind blocking base 31 is provided with a plurality of penetrating wind blocking bases. The air guide holes 34 of the seat 31 each include an air inlet 34b located on the air inlet side 30b and an air outlet 34a located on the air outlet side 30a. The diameter of the air inlet 34b is smaller than the diameter of the air outlet 34a; Each floating ball 32 is correspondingly accommodated in an air guide hole 34. The diameter of the floating ball 32 is larger than the diameter of the air inlet 34b and smaller than the diameter of the air outlet 34a; the baffle 33 is provided on the wind blocking base 31 close to the wind outlet side 30a. On one side, the baffle 33 is provided with a plurality of through holes 35, each through hole 35 facing the hole wall between the air guide hole 34 on the wind blocking base 31 and the adjacent air guide hole 34; wherein, as shown in FIG. As shown in 4A, when the airflow enters the wind blocking shutter 30 from the air inlet side 30b, the float ball 32 is blown by the airflow to the air outlet 34a, and contacts the baffle 33. A gap is formed between the inner wall of the air guide hole 34 and the float ball 32. The air flow channel is to allow the air flow to pass; as shown in Figure 4B, the float ball 32 is blown by the air flow to the air inlet 34b when the air flow enters the wind blocking shutter 30 from the outlet side 30a, and blocks the air inlet 34b to close the air flow channel.

In this way, when the fan 20 stops operating, the float 32 is placed in the air guide hole 34, and when airflow enters the wind blocking shutter 30 from the wind outlet side 30a, it is blown to the air inlet 34b under the action of the airflow. Since the float 32 The diameter is larger than the air inlet 34b, so the float 32 will block the air inlet 34b, preventing the airflow from passing through, thereby achieving the anti-backwind effect and preventing the airflow from passing through the wind blocking shutter 30 from the wind outlet side 30a.

When in use, the air blocking shutter 30 can prevent the exhausted hot air from being sucked back when the fan module 100 malfunctions and stops, such as when multiple fan modules 100 are installed on a hot air exhaust switch. , the plurality of fan modules 100 are installed in the same direction, and are used to discharge the heat in the switch. If some of the fan modules 100 fail and their fans stop running, if the exhausted hot air is sucked in through the stopped fan modules 100, the float 32 of the wind blocking shutter 30 will be blown to The air inlet 34b of the air guide hole 34 is blocked and the air inlet 34b is blocked, thereby closing the air flow channel and preventing the inhalation of hot air from interfering with the overall heat dissipation condition. Alternatively, the wind-blocking shutter 30 can also prevent the normally blown cold air from being discharged from the faulty fan module before it enters the switch when the fan module 100 fails and stops. For example, a cold air-inhaled switch is equipped with multiple In the case of fan modules 100, multiple fan modules 100 are installed in the same direction and are used to blow cold air into the switch. If some fan modules 100 fail and their fans stop running, the normally operating fan modules will If the cold air blown by the group 100 is blown directly from the faulty fan module, the float 32 of the wind blocking shutter 30 will be blown to the air inlet 34b of the air guide hole 34, and the air inlet 34b will be blocked, thereby closing the air flow channel. This prevents the airflow from being discharged before it has effectively passed through the heating components in the switch for heat dissipation, causing air backflow.

In other embodiments, as shown in FIGS. 4A and 4B , each air guide hole 34 is provided with a flange 36 protruding from the inner wall of the air guide hole 34 on the air inlet side 30 b, and the flange 36 forms the air inlet 34 b.

In other embodiments, the inner wall of the flange 36 is in the shape of an arc that is concave inward.

In this way, when the float ball 32 blocks the air inlet 34b, it can better fit the flange 36 and improve the blocking effect.

In other embodiments, as shown in FIG. 4B and FIG. 5 , the wind blocking base 31 includes a base plate 311 and a side wall 312 perpendicular to the base plate 311 . The side wall 312 forms a plurality of grids 313 . In this embodiment, each grid has The grid 313 is formed as an air guide hole 34, and the float 32 is accommodated in the grid 313. A plurality of openings 314 are formed on the substrate 311 corresponding to the plurality of grids 313. In this embodiment, each opening 314 is formed as a guide hole. The air inlet 34b of the air hole 34; each through hole 35 on the baffle 33 is facing the intersection of the side wall 312 on the wind blocking base 31.

As shown in Figure 6 and Figure 7A, in other embodiments, the installation frame 10 includes a base 13, and the wind shutter installation area 11 and the fan installation area 12 are provided on the base 13; The outer wall 14 of the installation area 11 faces away from the fan installation area 12 and the inner wall 15 located in the fan installation area 12 faces away from the wind shutter installation area 11. The outer wall 14 and the inner wall 15 are connected to the base 13; the inner wall 15 is provided with a guide slope 151 , the guide slope 151 forms an acute angle (not marked) with the base 13; the inner wall 15 is also provided with two guide plates 152, and the two guide plates 152 are respectively provided at the opposite ends of the inner wall 15 and tilt toward each other; the base A guide groove 131 is provided on the side of the base 13 away from the fan 20. The guide groove 131 is provided at one end of the base 13 close to the inner wall 15 and extends toward the outer wall 14; When the assembly 100 is installed into the electronic device, the fan module 100 is guided to be installed in place.

In use, the fan module 100 is installed to an electronic device, such as a switch, for heat dissipation of the switch. The fan module 100 is inserted into the switch with the outer wall 14 facing outward and the inner wall 15 facing inward. The guide slope 151 , the guide plate 152 and the guide groove 131 are used to guide the fan module 100 to be installed in place during this process.

In other embodiments, the inner wall 15 is provided with a wiring groove 153 , and the wiring groove 153 is used to accommodate the wiring terminals of the fan 20 .

In this way, when the fan module 100 is installed on the electronic device, the connection terminals of the fan 20 can be connected to the electronic device accordingly.

In other embodiments, the mounting bracket 10 is provided with a locking member 16 near the outer wall 14 . The locking member 16 is elastically connected to the mounting frame 10 . The locking member 16 is provided with a snap-in portion 161 , and the snap-in portion 161 is used to connect the fan module to the mounting bracket 16 . After the group 100 is installed in place, the fan module 100 is fixed.

When the fan module 100 is installed on the electronic device, the clamping portion 161 is pressed by the electronic device, causing the locking member 16 to deform and tilt toward the mounting bracket 10 until the fan module 100 is installed in place. The elastic force of the firmware 16 snaps into the electronic device, thereby fixing the fan module 100 after the fan module 100 is installed in place.

During use, as shown in FIG. 1 and FIG. 7A , when the air supply direction B of the fan 20 is the same as the insertion direction A, the wind blocking shutter 30 is installed on the air outlet side 30 a facing the fan 20 to allow the airflow to pass through in sequence. Wind blocking shutter 30 and fan 20. In this way, when using the fan module 100 provided by the present application, first determine the required air outlet direction according to the installation environment of the fan module 100 . For example, the fan module 100 needs to be installed in a cold air intake switch and needs to generate airflow from the outer wall 14 to the inner wall 15 to provide external cold air to the switch to dissipate heat. Then the fan 20 is installed in the air supply direction B and inserted into the switch. The connection direction A is the same. Correspondingly, the choke shutter 30 is installed with the air outlet side 30a facing the fan 20 to allow the airflow to pass through the choke shutter 30 and the fan 20 in sequence and enter the cold air intake switch to supply external cold air for heat dissipation.

As shown in FIG. 1 and FIG. 7B , when the air supply direction B of the fan 20 is opposite to the insertion direction A, the wind blocking shutter 30 is installed on the air inlet side 30 b facing the fan 20 to allow the airflow to pass through the fan 20 and the wind blocking shutter in sequence. 30. In this way, when using the fan module 100 provided by the present application, first determine the required air outlet direction according to the installation environment of the fan module 100 . For example, the fan module 100 needs to be installed in a heat exhaust switch and needs to generate airflow from the inner wall 15 to the outer wall 14 to discharge the hot air generated in the switch for heat dissipation. Then the fan 20 is installed in the air supply direction B and is inserted into the switch. The connection direction A is opposite. Correspondingly, the air blocking shutter 30 is installed with the air inlet side 30b facing the fan 20 to allow the air flow to pass through the fan 20 and the air blocking shutter 30 in sequence to discharge the hot air in the hot exhaust switch. When the fan 20 is turned off, and the air flow direction is different from the air flow direction allowed by the wind blocking shutter 30, the float ball 32 blocks the air inlet 34b of the air guide hole 34 due to the pressure difference on both sides of the fan module 100, closing the air flow channel. Block the passage of airflow to avoid interference with airflow in different directions.

In this embodiment, by turning the fan 20 180° and then reinstalling it to the mounting bracket 10, the air supply direction B of the fan 20 is switched between the same or the opposite direction as the plugging direction. Correspondingly, by turning the resistance The wind shutter 30 is removed from the mounting bracket 10 , flipped 180° and reinstalled to the mounting bracket 10 , so that the wind shutter 30 can be switched between the wind outlet side 30 a facing the fan 20 and the air inlet side 30 b facing the fan 20 . It can be understood that in this embodiment, the fan 20 can only generate airflow in a single direction, and the fan 20 needs to be turned over to switch the direction of the airflow generated by the fan 20. In other embodiments, a switchable wind direction can also be used. fan, that is, the airflow generated by the fan can be switched without adjusting the fan direction.

As shown in Figure 2, in other embodiments, the wind choke shutter 30 further includes a filter 37, which is detachably inserted into the wind choke base 31 and is located on the wind inlet side 30b of the wind choke base. .

In this way, when the fan module 100 is used as a cold air-sucking switch, the filter 37 can prevent the fan module 100 from sucking in cold air while also bringing in dust, debris and other impurities.

In other embodiments, the wind blocking base 31 is provided with a plurality of brackets 38, and the filter screen 37 is inserted into the wind blocking base 31 through the brackets 38, so that the filter screen 37 can be replaced when necessary. In this embodiment, In the embodiment, the bracket 38 has an L-shaped structure. It can be understood that the bracket 38 can also be of other shapes or structures, such as a U-shape or a buckle with a snap-on function, as long as it is convenient to snap the filter 37 and facilitate the detachable connection of the filter 37 .

In this embodiment, as shown in FIG. 7A , the wind blocking base 31 is provided with six brackets 38 , which are respectively provided on the three frames of the wind blocking base 31 for jointly fixing the filter 37 . In this way, when replacing the filter screen 37, you only need to remove the original filter screen 37 from the side of the frame where the bracket 38 is not installed, and then insert the new filter screen 37.

In other embodiments, the wind block base 31 is provided with a mark 39 for indicating the direction of the air flow generated by the fan 20, so that the user does not need to take out the fan 20 or the block when installing the fan module 100 in an electronic device such as a switch. The wind shutter 30 can confirm the status of the fan 20 or the wind shutter 30 .

In other embodiments, the wind-blocking shutter 30 further includes an upper cover 40 . The upper cover 40 covers the wind-blocking base 31 and is opposite to the base 13 . The upper cover 40 is provided with a light-transmitting indicator window 41 facing the mark 39 .

In other embodiments, the present application also provides a heat dissipation device (not shown) suitable for hot air exhaust switches and cold air suction switches. The heat dissipation device includes the fan module 100 as described in the above embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that Therefore, the technical solution of the present application may be modified or equivalently substituted without departing from the spirit and scope of the technical solution of the present application.

100:Fan module

10:Mounting rack

11:Wind shutter installation area

12: Fan installation area

20:Fan

30: wind shutter

40: Upper cover

A:Plug direction

Claims (10)

A fan module is used to be installed on one end of an electronic device along the plugging direction to dissipate heat of the electronic device. The improvement is that it includes: a mounting bracket for connecting the electronic device, and the upper edge of the mounting bracket The plugging direction is provided with a wind shutter installation area and a fan installation area in sequence; the fan is detachably installed in the fan installation area of the mounting frame, and the air supply direction of the fan is the same as the plugging direction or On the contrary; the wind-blocking shutter is detachably installed in the wind-blocking shutter installation area of the mounting frame. The wind-blocking shutter has an air outlet side and an air inlet side opposite to the air outlet side to allow airflow. Passing through the wind blocking shutter in the direction from the wind inlet side to the wind outlet side, the wind blocking shutter includes: a wind blocking base, and a plurality of wind blocking bases are provided on the wind blocking base to penetrate the wind blocking The air guide holes of the base, each air guide hole includes an air inlet located on the air inlet side and an air outlet located on the air outlet side, and the diameter of the air inlet is smaller than the diameter of the air outlet; A plurality of floating balls, each floating ball is correspondingly accommodated in one of the air guide holes, and the diameter of the floating ball is greater than the diameter of the air inlet and smaller than the diameter of the air outlet; a baffle is provided on the On the side of the wind blocking base close to the wind outlet side, the baffle is provided with a plurality of through holes, each of the through holes is facing the air guide hole and the adjacent air guide hole on the wind blocking base. The hole walls between the air guide holes; wherein, when the airflow enters the wind blocking shutter from the wind inlet side, the floating ball is blown by the airflow to the air outlet and abuts against the baffle, An airflow channel is formed between the inner wall of the air guide hole and the floating ball to allow the airflow to pass; the floating ball is blown by the airflow when the airflow enters the wind blocking shutter from the wind outlet side. to the air inlet and block the air inlet to close the air flow channel. The fan module according to claim 1, wherein each of the air guide holes is provided with a flange protruding from the inner wall of the air guide hole on the air inlet side, and the flange forms the air inlet. . The fan module according to claim 2, wherein the inner wall of the flange is in the shape of an inward concave arc. The fan module according to claim 1, wherein the wind blocking base includes a base plate and a side wall perpendicular to the base plate, the side walls form a plurality of grilles, and each grille forms one of the air guides. hole, the floating ball is accommodated in the grille, a plurality of openings are formed on the substrate corresponding to a plurality of the grilles, and each opening is formed as an air inlet of the air guide hole; the baffle Each of the through holes on the wind block base faces the intersection of the side wall and the side wall. The fan module according to claim 1, wherein the wind blocking shutter further includes a filter, the filter is detachably inserted on the wind blocking base and is located on all parts of the wind blocking base. Talk about entering the wind side. The fan module according to claim 5, wherein the wind blocking base is provided with a plurality of brackets, and the filter is inserted into the wind blocking base through the brackets. The fan module according to claim 1, wherein the installation frame includes a base, and the wind blocking shutter installation area and the fan installation area are provided on the base; the installation frame further includes the wind blocking shutter installation area and the fan installation area. The outer wall of the shutter installation area facing away from the fan installation area and the inner wall located in the fan installation area away from the wind blocking shutter installation area, the outer wall and the inner wall are connected to the base; the inner wall A guide slope is provided, and the guide slope forms an acute angle with the base; the inner wall is also provided with two guide plates, and the two guide plates are respectively provided at opposite ends of the inner wall and face toward the base. inclined to each other; the side of the base away from the fan is provided with a guide groove, the guide groove is located at an end of the base close to the inner wall and extends toward the outer wall; the guide slope and guide plate The guide groove is used to guide the fan module to be installed in place when the fan module is installed on the electronic device. The fan module according to claim 7, wherein the inner wall is provided with a wiring groove, and the wiring groove is used to accommodate the wiring terminal of the fan. The fan module according to claim 8, wherein the mounting bracket is provided with a locking piece near the outer wall, the locking piece is elastically connected to the mounting frame, and the locking piece is provided with a snap portion , the clamping portion is used to fix the fan module after the fan module is installed in place. A heat dissipation device suitable for hot air exhaust switches and cold air intake switches. The improvement is that it includes the fan module as described in any one of claims 1 to 9.

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