TW201721345A - Heat dissipation apparatus - Google Patents

Abstract

A heat dissipation apparatus includes a fan module, heat-dissipated fins and an air-guiding plate. The fan module includes a housing, a fan, and a closure component. The housing includes an outlet, an inlet and a sidewall. The inlet has a first portion and a second portion. The fan is pivotally-connected inside the housing. A compression zone is defined between the sidewall and the fan from a tongue portion of the housing along the rotational direction to the outlet. The closure component is disposed on the outlet, and configured to selectively open or block the outlet. The heat-dissipated fins are disposed outside the first portion of the inlet. The air-guiding plate is pivotally-connected to the housing between the first portion and the second portion between the inlet, and extended into the housing. While the heat dissipation apparatus is working on a first mode, the closure component opens the outlet, and the air-guiding plate is blocked between the compression zone and the second portion of the inlet. While the heat dissipation apparatus is working on a second mode, the closure component blocks the outlet, and the air-guiding plate is blocked between the compression zone and the first portion of the inlet.

Description

Heat sink

The present invention relates to a heat sink, and more particularly to a dust-removable fan heat sink.

In general, computing devices, such as notebooks, personal computers, etc., in the normal operation, the heat generated by the divergent computing components or other components, through the provision of thermal modules, such as cooling fins, fan modules A heat pipe or the like, thereby preventing heat from accumulating in the computing device, causing the temperature in the computing device to rise, thereby affecting the operation of the computing device. In severe cases, the components in the computing device may even be damaged or stopped. However, with the accumulation of use, the dust in the normal use environment, etc., can easily accumulate in the heat dissipation module of the computing device, such as the space between the heat dissipation fins or the fan air outlet, so that the heat dissipation module is less likely to be exchanged with cold air. And heat dissipation. Similarly, dust deposited on the heat sink module can also affect the path of cold air entering the heat sink module. Or, in some cases, dust may block the space between the fins or the air outlet, so that the heat dissipation module cannot be quickly exchanged with the cold air outside, reducing the heat dissipation efficiency of the heat dissipation module, and also affecting the calculation device. The temperature, and possibly further affects the normal operation of the computing device. It can be seen that the above existing architecture obviously has inconveniences and defects, and needs to be further improved. In order to solve the above problems, the relevant fields have not exhausted their efforts to seek solutions, but the methods that have not been applied for a long time have been developed. Therefore, how to effectively solve the above problems is one of the current important research and development topics, and it has become an urgent target for improvement in related fields.

One aspect of the present invention relates to a heat dissipating device including a fan module, which utilizes a switchable baffle plate in a housing of a fan module, such that a flow field of the fan follows the position of the baffle And change. When the closing member of the fan module opens the air outlet and the deflector rotates relative to the housing to block between the pressure collecting portion and the second portion, the fan module is in a normal state, and the fan member uses cold air from the air inlet. Take it to the air outlet. When the closing member closes the air outlet and the deflector rotates relative to the housing to block between the pressure collecting portion and the first portion, the heat sink is in the dust removing mode, and the fan member pressurizes the air from the first portion of the air inlet Move to the second part of the air inlet to drive dust that sticks to the air inlet of the fan module or between the heat sink fins, and remove the dust through the second part of the air inlet. In this way, the heat dissipation device can be reduced or prevented from affecting the air circulation into the fan module due to dust accumulation, so that the working efficiency of the heat dissipation device is improved.

The invention provides a heat dissipating device comprising a fan module, a heat dissipating fin and a baffle. The fan module includes a housing, a fan member, and a closure. The housing has a housing inner space, an air outlet, and an air inlet, and includes a side wall. The air inlet has a first portion and a second portion. The side wall has a tongue. The fan member is pivoted in the inner space of the housing and is rotatable relative to the housing along the rotational direction, wherein the pressure dividing region is defined between the side wall and the fan member by the tongue along the rotation direction to the air inlet. The closure is disposed at the air outlet and is configured to selectively open or close the air outlet. The heat sink fin is disposed at the first portion of the air inlet. The deflector pivotally houses the housing between the first portion and the second portion of the air inlet and extends into the interior of the housing. When the heat sink is in the first mode, the closure opens the air outlet and the deflector rotates relative to the housing to block between the pressure collection region and the second portion. When the heat sink is in the second mode, the closure closes the air outlet, and the deflector rotates relative to the housing to block between the pressure collecting region and the first portion.

In one or more embodiments of the present invention, the above-mentioned closure member is a shutter switch. The fan module further includes a control button configured to open and close the shutter switch.

In one or more embodiments of the present invention, the one end of the deflector away from the air inlet is coupled to the shutter switch, wherein when the shutter switch is closed, the shutter switch drives the deflector away from the side of the air inlet away from the side wall.

In one or more embodiments of the present invention, the baffle plate includes a first magnetic member, and the heat dissipating device further includes a second magnetic member configured to selectively attract the first magnetic member to keep the baffle away from the intake air. One end of the mouth rests against the housing or repels the first magnetic member such that one end of the baffle away from the air inlet is remote from the housing.

In one or more embodiments of the present invention, the second magnetic member includes a core, a coil, and a power supply. The coil wraps around the core. The power supply is electrically connected to the coil. When the power supply emits the first current, the second magnetic member repels the first magnetic member such that one end of the baffle away from the air inlet is away from the side wall and blocks between the pressure collecting portion and the first portion.

In one or more embodiments of the present invention, the heat dissipating device, wherein when the power source supplies the second current, wherein the direction of the first current is opposite to the direction of the second current, the second magnetic member attracts the first magnetic member, The end of the baffle away from the air inlet is pressed against the side wall to block between the pressure collecting zone and the second part.

In one or more embodiments of the present invention, the heat dissipating device, wherein when the end of the baffle away from the air inlet is against the side wall, the power supply stops the second current, and the magnetic between the first magnetic component and the core attract.

In one or more embodiments of the present invention, the cross-sectional area of the first portion of the air inlet is larger than the cross-sectional area of the second portion of the air inlet.

In one or more embodiments of the present invention, the heat dissipating device, wherein when the heat dissipating device is in the second mode, the end of the baffle away from the air inlet is adjacent to the side wall of the side wall of the first portion of the air inlet The shortest distance is greater than the shortest distance between the end of the baffle away from the air inlet and the side of the side wall adjacent the second portion of the air inlet.

In one or more embodiments of the present invention, the heat dissipating device, wherein when the heat dissipating device is in the second mode, the cross-sectional area of the first portion of the air inlet is greater than the distance between the end of the baffle away from the air inlet and the tongue Cross-sectional area.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and components are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

The use of the terms first, second, and third, etc., is used to describe various elements, components, regions, layers and/or blocks. However, these elements, components, regions, layers and/or blocks should not be limited by these terms. These terms are only used to identify a single element, component, region, layer, and/or block. Thus, a singular element, component, region, layer and/or block may be referred to as a second element, component, region, layer and/or block, without departing from the spirit of the invention.

FIG. 1 is a perspective view of the heat dissipation device 100 according to various embodiments of the present invention in a first mode, wherein the first mode may be a normal operation mode. FIG. 2 is a top perspective view of the heat sink 100 according to various embodiments of the present invention in a first mode, according to FIG. As shown in FIGS. 1 and 2, the heat sink 100 includes a fan module 110, heat sink fins 140, and a deflector 150 (see FIG. 2). The fan module 110 includes a housing 120, a fan member 130, and a closure member 190 (see FIG. 3 or FIG. 4). The housing 120 has a housing inner space 122, an air outlet 124, and an air inlet, and includes a side wall 128. In various embodiments, the housing 120 can include a bottom plate 127 that defines a housing interior space 122 in conjunction with the side walls 128. The air outlet 124 is located on the bottom plate 127, and when the heat sink 100 is in the normal operation mode, the air outlet 124 can open the communication inner space 122 and the outside to exclude hot air. The air inlet has a first portion 126a and a second portion 126b. The side wall 128 has a tongue 129. The fan member 130 is pivoted in the housing inner space 122 and rotates relative to the housing 120 along a single rotation direction. The gap between the side wall 128 and the fan member 130 is defined by the tongue 129 along the rotation direction to the air inlet. 132. The closure member 190 is disposed at the air outlet 124 and is configured to selectively open or close the air outlet 124. The heat dissipation fins 140 are disposed at the first portion 126a of the air inlet. The deflector 150 pivotally connects the housing 120 between the first portion 126a and the second portion 126b of the air inlet and extends into the inner space 122 of the housing. When the heat sink 100 is in the first mode or the normal operation mode, the closing member 190 opens the air outlet 124, and the deflector 150 rotates relative to the housing 120 to block the pressure collecting portion 132 and the second portion 126b of the air inlet. During the interval, the pressure collecting zone 132 is separated from the second portion 126b of the air inlet, and the airflow enters the inner space 122 from the first portion 126a of the air inlet, and is pushed and pressurized to the pressure collecting area 132 by the fan member 130. The air outlet 124 exits the fan module 110. When the heat sink 100 is in the normal operation mode, the deflector 150 can insulate the inner space 122 of the housing from the second portion 126b of the air inlet so that the airflow can only exit the fan module 110 from the air outlet 124.

FIG. 3 is a perspective view of the heat sink 100 according to various embodiments of the present invention in a second mode, wherein the second mode may be a dust removal mode. 4 is a top perspective view of the heat sink 100 of the embodiment of the present invention in a second mode, wherein the fan member 130 of the heat sink 100 is shown as a broken line by the cover member 190. As shown in FIG. 3 and FIG. 4, when the heat sink 100 is in the second mode or the dust removal mode, the closing member 190 can close the air outlet 124, and the deflector 150 rotates relative to the housing 120 to block the pressure collecting area. Between the first portion 126a of the air inlet and the first portion 126a of the air inlet, the first portion 126a of the air inlet is attracted by the negative pressure generated by the fan member 130, and the first portion 126a of the air inlet enters the inner space 122 of the housing. The second portion 126b of the air inlet that is pushed and pressurized by the fan member 130 to the pressure collecting portion 132 and communicates with the pressure collecting portion 132 leaves the fan module 110.

Since the baffle 150 is switchably mounted in the housing 120 of the fan module 110, it can selectively block the side wall 128 in the normal operation mode and block the second portion of the pressure collecting area 132 and the air inlet. Between the portions 126b, or away from the side wall 128 in the dust removal mode, between the pressure collecting portion 132 and the first portion 126a of the air inlet, the airflow after being co-pressurized by the fan member 130 and the housing 120 is diverted. The plate 150 cooperates with the closure member 190 to exit from the air outlet 124 or exit from the second portion 126b of the air inlet without changing the direction of rotation of the fan member 130. When the closure member 190 encloses the air outlet 124 and the deflector 150 blocks between the pressure collecting region 132 and the first portion 126a of the air inlet, the fan member 130 can pressurize the air from the first portion 126a of the air inlet. The second portion 126b of the air inlet is driven by the pressurized airflow to attract dust that is stuck outside the air inlet of the fan module 110 or between the heat dissipation fins 140 into the housing space 122, and is pushed along with the fan member 130. The pressurized air flow exits from the second portion 126b of the air inlet to achieve the function of removing dust. In this way, the heat dissipation device 100 can remove the dust accumulated on the heat dissipation fins 140 and the fan module 110 of the heat dissipation device 100 without changing the rotation direction of the fan member 130, thereby reducing or avoiding the heat dissipation device 100. The dust accumulation affects the flow of air into the fan module 110, and the work efficiency and heat exchange efficiency of the heat sink 100 are improved.

Referring to Figure 2, in various embodiments, the cross-sectional area of the first portion 126a of the air inlet is greater than the cross-sectional area of the second portion 126b of the air inlet. In other words, in various embodiments, the first portion 126a of the intake port has a width d1 and the second portion 126b of the intake port has a width d2, and the first portion 126a of the intake port and the second portion of the intake port The 126b collectively has a height S, and the width d1 of the first portion 126a of the air inlet is greater than the width d2 of the second portion 126b of the air inlet. As such, in FIG. 4, the velocity of the airflow at the first portion 126a of the air inlet is less than the velocity of the second portion 126b of the air inlet to create a first portion 126a and airflow through which the airflow flows. The pressure difference at the second portion 126b of the port allows the airflow to smoothly exit from the first portion 126a of the air inlet through the fan member 130 to the second portion 126b of the air inlet, and further reduce or avoid dust from the air intake After the first portion 126a of the mouth enters the inner space 122 of the casing, the pressure difference is too small, and stays in the inner space 122 of the casing, which further affects the operation of the heat sink 100.

Referring to FIG. 4, in various embodiments, when the heat sink 100 is in the second mode or the dust removal mode, the end of the deflector 150 away from the air inlet and the side wall 128 are adjacent to the side of the first portion 126a of the air inlet. The shortest distance d3 between is greater than the shortest distance d4 between the end of the baffle 150 away from the air inlet and the side of the side wall 128 adjacent the second portion 126b of the air inlet. That is, when the heat dissipating device 100 is in the dust removing mode, the side of the inner space 122 close to the air inlet is blocked by the deflector 150, and the cross-sectional area of the portion close to the first portion 126a of the air inlet is larger than the closer. The cross-sectional area of the portion of the second portion 126b of the air inlet is such that the velocity of the airflow of the first portion 126a of the air inlet is less than the velocity of the second portion 126b of the air inlet such that the airflow flows through the first portion 126a of the air inlet The second portion 126b of the air inlet can create a pressure differential that allows the airflow to more smoothly exit from the first portion 126a of the air inlet through the fan member 130 to the second portion 126b of the air inlet.

Similarly, referring to FIG. 4, in various embodiments, when the heat sink 100 is in the second mode or the dust removal mode, the cross-sectional area of the first portion 126a of the air inlet is greater than the end of the deflector 150 away from the air inlet. The cross-sectional area between the tongues 129. In other words, in various embodiments, when the heat sink 100 is in the dust removal mode, the first portion 126a of the air inlet has a width d5 and a width d3 between the end of the deflector 150 away from the air inlet and the tongue 129, And the first portion 126a of the air inlet has a height S together with the inner space 122, and the width d5 of the first portion 126a of the air inlet is greater than the width d3 between the end of the deflector 150 away from the air inlet and the tongue 129. In this way, in FIG. 4, the airflow attracted by the negative pressure generated by the fan member 130 enters the inner space 122 from the first portion 126a of the air inlet port, and the speed is smaller than that of the air flow through the deflector 150. The velocity between one end of the mouth and the tongue 129 can pressurize the airflow velocity in front of the fan member 130 to a greater extent, allowing the airflow to enter the fan member 130 to more smoothly exit the second portion 126b of the air inlet.

It should be noted that the cross-sectional area of the first portion 126a of the air inlet described herein and the cross-sectional area of the second portion 126b of the air inlet, and the side of the air deflector 150 that blocks the inner space 122 of the housing near the air inlet. Divided into two parts, wherein the cross-sectional area of the portion of the first portion 126a adjacent to the air inlet is close to the cross-sectional area of the portion of the second portion 126b adjacent to the air inlet, or the cross-sectional area of the first portion 126a of the air inlet is away from the deflector 150 The cross-sectional area between the one end of the air inlet and the tongue 129 is merely an example and is not intended to limit the present invention. It should be understood that those skilled in the art can make appropriate modifications or substitutions without departing from the spirit and scope of the disclosure, as long as the heat sink 100 is in the dust removal mode, the airflow can carry dust from the air intake. The first portion 126a of the port is attracted by the pressure differential created by the fan member 130, and is forced into the fan member 130 and then exits from the second portion 126b of the air inlet.

Referring to Figure 3, in various embodiments, the closure 190 can be a shutter switch. The fan module 110 can further include a control button 160 configured to turn the shutter switch on or off. It should be understood that the form of the closure member 190 described herein is only an example, and is not intended to limit the present invention. Those skilled in the art can make appropriate measures without departing from the spirit and scope of the disclosure. Modifications or substitutions may be made as long as the control button 160 selectively controls the closure member 190 to open or close the air outlet 124 in communication with the housing interior space 122.

In various embodiments, the end of the baffle 150 away from the air inlet is coupled to the shutter switch, wherein when the shutter switch is closed, the shutter switch drives the end of the baffle 150 away from the air inlet away from the side wall 128. In various embodiments, the baffle 150 can be coupled to the closure 190 through the linkage rod to interlock with the closure 190. In various embodiments, the baffle 150 can act separately from the closure 190. In various embodiments, the baffle 150 can include a shutter and a linkage rod (not shown).

FIG. 5 is a top perspective view of the heat sink 200 according to further embodiments of the present invention in a first mode, wherein the first mode may be a normal operation mode. 6 is a top perspective view of the heat sink 200 according to further embodiments of the present invention in a second mode, wherein the second mode may be a dust removal mode. As shown in FIGS. 5 and 6, in various embodiments, the baffle 150 can include a first magnetic member 170. In various embodiments, the first magnetic member 170 is disposed at one end of the deflector 150 adjacent the second portion 126b of the air inlet. The heat sink 200 may further include a second magnetic member 180. The second magnetic member 180 is configured to selectively attract the first magnetic member 170 such that one end of the deflector 150 away from the air inlet is against the housing 120 or repels the first magnetic member 170 to keep the deflector 150 away from the inlet. One end of the port is remote from the housing 120.

In various embodiments, the second magnetic member 180 includes a core 184, a coil 182, and a power supply (not shown). The coil 182 is wound around the core 184. In various embodiments, the coil 182 and the core 184 are insulated from each other. The power supply is electrically connected to the coil 182. In various embodiments, the power supply can be an alternating current supply or a switchable direct current supply. As shown in FIG. 6, when the power supply supplies the first current, the second magnetic member 180 repels the first magnetic member 170, so that one end of the deflector 150 away from the air inlet is away from the side wall 128 and blocks from the pressure collecting region 132. Between the first portion 126a of the air inlet. For example, when the first magnetic member 170 faces the side wall 128, the anode is N pole, and the power supply sends a first current to cause the coil 182 and the core 184 to be inductive to the N pole on the side of the first magnetic member 170. A magnetic member 170 is mutually exclusive, and the first magnetic member 170 is rotated to drive the end of the deflector 150 away from the air inlet away from the side wall 128. However, the present invention is not limited thereto, and those skilled in the art can make appropriate modifications or substitutions without departing from the spirit and scope of the present disclosure, as long as the first current is supplied to the power supply to cause the coil 182 and the core 184 to be induced. In the case of the magnetic pole, the first magnetic member 170 can be repelled to rotate the deflector 150 away from the side wall 128.

As shown in FIG. 5, in various embodiments, when the power supply supplies a second current, wherein the direction of the first current is opposite to the direction of the second current, the second magnetic member 180 attracts the first magnetic member 170, so that One end of the deflector 150 away from the intake port abuts against the side wall 128 and blocks between the pressure collecting zone 132 and the second portion 126b of the air inlet. For example, when the first magnetic member 170 faces the side wall 128, the side is N pole, and the power supply sends a second current whose direction is opposite to the first current direction, so that the coil 182 and the core 184 face the first magnetic member 170. The side is attracted to the S pole and is attracted to the first magnetic member 170, and the first magnetic member 170 is rotated to drive the end of the deflector 150 away from the air inlet against the side wall 128. However, the present invention is not limited thereto, and those skilled in the art can make appropriate modifications or substitutions without departing from the spirit and scope of the present disclosure, as long as the second current is supplied to the power supply to cause the coil 182 and the core 184 to be induced. In the case of the magnetic pole, the first magnetic member 170 can be attracted to move the deflector 150 toward the side wall 128.

In various embodiments, when the end of the baffle 150 away from the air inlet is against the side wall 128, the power supply can stop the second current and magnetically attract the first magnetic member 170 and the core 184. For example, the core 184 can be a temporary ferromagnetic material that is induced into different pole arrangements by different currents on the coil 182. When the first magnetic member 170 is close to the core 184, even if the power supply is cut off, due to the core 184 The first magnetic member 170 has been temporarily magnetized to attract the first magnetic member 170, so that the mutually attracted state can be maintained until the power supply supplies the first current.

In summary, the present invention provides a heat dissipation device including a fan module, a heat dissipation fin, and a deflector. The fan module includes a housing, a fan member, and a closure. The housing has a housing inner space, an air outlet, and an air inlet, and includes a side wall. The air inlet has a first portion and a second portion. The side wall has a tongue. The fan member is pivoted in the inner space of the housing and is rotatable relative to the housing along the rotational direction, wherein the pressure dividing region is defined between the side wall and the fan member by the tongue along the rotation direction to the air inlet. The closure is disposed at the air outlet and is configured to selectively open or close the air outlet. The heat sink fin is disposed at the first portion of the air inlet. The deflector pivotally houses the housing between the first portion and the second portion of the air inlet and extends into the interior of the housing. When the heat sink is in the first mode, the closure opens the air outlet and the deflector rotates relative to the housing to block between the pressure collection region and the second portion. When the heat sink is in the second mode, the closure closes the air outlet, and the deflector rotates relative to the housing to block between the pressure collecting region and the first portion.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧heating device
110‧‧‧Fan module
120‧‧‧shell
122‧‧‧Inside the shell
124‧‧‧ air outlet
126a‧‧‧Part 1
126b‧‧‧Part II
127‧‧‧floor
128‧‧‧Side wall
129‧‧ ‧Tongue
130‧‧‧Fan parts
132‧‧‧Collection zone
140‧‧‧Heat fins
150‧‧‧ deflector
160‧‧‧Control button
170‧‧‧First magnetic parts
180‧‧‧Second magnetic parts
182‧‧‧ coil
184‧‧‧ core
190‧‧‧Closed
200‧‧‧ Heat sink
Width d1/d2/d3/d4/d5‧‧‧
S‧‧‧ Height

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. The description of the drawings is as follows: FIG. 1 illustrates a heat sink according to various embodiments of the present invention in a first mode. Stereogram. 2 is a top perspective view of the heat sink according to the embodiment of the present invention in a first mode, according to FIG. 3 is a perspective view of the heat sink according to various embodiments of the present invention in a second mode. 4 is a top perspective view of the heat sink according to the embodiment of the present invention in a second mode, according to FIG. Figure 5 is a top perspective view of the heat sink according to further embodiments of the present invention in a first mode. Figure 6 is a top perspective view of the heat sink according to further embodiments of the present invention in a second mode. Unless otherwise indicated, the same numbers and symbols in the different figures are generally regarded as the corresponding parts. The illustrations are drawn to clearly illustrate the relevant associations of the embodiments and not to depict the actual dimensions.

110‧‧‧Fan module

120‧‧‧shell

122‧‧‧Inside the shell

124‧‧‧ air outlet

126a‧‧‧Part 1

126b‧‧‧Part II

127‧‧‧floor

128‧‧‧Side wall

129‧‧ ‧Tongue

130‧‧‧Fan parts

132‧‧‧Collection zone

140‧‧‧Heat fins

150‧‧‧ deflector

170‧‧‧First magnetic parts

180‧‧‧Second magnetic parts

182‧‧‧ coil

184‧‧‧ core

190‧‧‧Closed

200‧‧‧ Heat sink

Claims (10)

A heat dissipating device comprises: a fan module comprising: a casing having a casing inner space, an air outlet and an air inlet, and comprising a side wall, the air inlet having a first portion and a second a portion of the side wall having a tongue portion; a fan member pivotally disposed in the inner space of the housing and configured to rotate relative to the housing along a rotational direction, wherein the side wall and the fan member are separated by the tongue a portion defining a nip in the direction of rotation to the inlet; and a closure member disposed at the outlet for being configured to selectively open or close the outlet; a plurality of fins disposed thereon a first portion of the air inlet; and a baffle pivotally connecting the housing between the first portion and the second portion of the air inlet and extending into the inner space of the housing, wherein the heat sink is located In a first mode, the closure opens the air outlet, and the deflector rotates relative to the housing to block between the nip and the second portion, and when the heat sink is in a second mode When the closure closes the air outlet, And the baffle rotates relative to the casing to block between the pressure collecting zone and the first portion. The heat sink of claim 1, wherein the closure is a shutter switch, wherein the fan module further comprises a control button configured to open and close the shutter switch. The heat dissipating device of claim 2, wherein the baffle is connected to the shutter switch away from the end of the air inlet, wherein the shutter switch drives the baffle when the shutter switch is closed The end remote from the air inlet is remote from the side wall. The heat dissipating device of claim 1, wherein the baffle comprises a first magnetic member, and the heat dissipating device further comprises a second magnetic member configured to selectively attract the first magnetic member. The baffle abuts the housing away from the end of the air inlet or repels the first magnetic member such that the end of the baffle away from the air inlet is remote from the housing. The heat dissipation device of claim 5, wherein the second magnetic member comprises: a core; a coil wound around the core; and a power supply electrically connected to the coil, wherein when the power supply is issued At a current, the second magnetic member repels the first magnetic member such that the end of the baffle away from the air inlet is away from the side wall and blocks between the pressure collecting region and the first portion. The heat dissipation device of claim 5, wherein when the power supply supplies a second current, wherein the direction of the first current is opposite to the direction of the second current, the second magnetic member attracts the first a magnetic member, the end of the deflector away from the air inlet is abutted against the side wall and blocked between the pressure collecting area and the second part The heat dissipation device of claim 6, wherein the power supply stops the second current when the deflector is away from the side wall of the air inlet, and the first magnetic component is Magnetic attraction with the core. The heat dissipating device of claim 1, wherein a cross-sectional area of the first portion of the air inlet is larger than a cross-sectional area of the second portion of the air inlet. The heat dissipating device of claim 1, wherein when the heat dissipating device is in the second mode, the end of the baffle away from the air inlet is adjacent to the side wall of the first portion of the air inlet A shortest distance between one side of the deflector is greater than a shortest distance between the end of the baffle away from the air inlet and the side of the side wall adjacent the second portion of the air inlet. The heat dissipating device of claim 1, wherein when the heat dissipating device is in the second mode, a cross-sectional area of the first portion of the air inlet is greater than an end of the baffle away from the air inlet A cross-sectional area between the tongues.