CN102622064A - Mobile arithmetic device - Google Patents

Abstract

A mobile computing device comprises a shell, a circuit board, a first heat dissipation module, an exhaust centrifugal fan and a convection centrifugal fan. The shell is provided with a first through hole. The circuit board is arranged on the shell and is provided with a first heating device. The first heat dissipation module is provided with a first heat absorption end and a first heat dissipation end, and the first heat absorption end is in thermal contact with the first heat generation device. The centrifugal fan for exhausting air has a first exhaust port, and the first heat dissipation end is arranged between the first exhaust port and the first through hole so that the centrifugal fan for exhausting air exhausts air to the outside of the shell. The centrifugal fan for convection is disposed in the casing and discharges air into the casing. Therefore, the air flow circulation is generated in the shell, so that the mobile arithmetic device has good heat dissipation effect.

Description

mobile computing device

technical field

The invention relates to a mobile computing device, in particular to a mobile computing device with multiple cooling fans.

Background technique

With the continuous advancement of science and technology, the daily necessities of modern people are all developing towards digitization and informationization. Take mobile computing devices as an example, such as notebook computers, tablet computers, etc., which are convenient for users to carry, so that users can freely use them in any occasion.

However, under the trend of technological development, researchers are committed to making mobile computing devices continuously move towards the goal of high performance and small size. Therefore, the heat dissipation structure of the mobile computing device is particularly important. Please refer to FIG. 1A and FIG. 1B , FIG. 1A is a schematic structural diagram of a conventional mobile computing device, and FIG. 1B is a perspective view of a conventional mobile computing device.

The existing mobile computing device has a casing 100', a circuit board 200', a first cooling module 300', a second cooling module 400', a first centrifugal fan 500' and a second centrifugal fan 600 ', wherein the casing 100' includes a top plate 110', a bottom plate 120' opposite to each other, and a side plate 130' connecting the bottom plate 120' to the top plate 110'. The side plate 130' has a first through hole 131' and a second through hole 132', and the bottom plate 120' has a plurality of ventilation holes 121'.

The circuit board 200' is disposed in the casing 100', and the circuit board 200' has a central processing unit 11', a graphics chip 12' and a memory 13'. In addition, the first centrifugal fan 500' and the second centrifugal fan 600' are disposed on the circuit board 200', wherein the first centrifugal fan 500' is adjacent to the first through hole 131', and the second centrifugal fan 600' is adjacent to the second through hole 131'. Two through holes 132'. One end of the first heat dissipation module 300' is in thermal contact with the central processing unit 11', and the other end of the first heat dissipation module 300' is interposed between the first centrifugal fan 500' and the first through hole 131'. The first heat dissipation module 300' absorbs the heat energy generated by the central processing unit 11', and discharges the heat energy absorbed by the first heat dissipation module 300' through the first through hole 131' through the airflow generated by the first centrifugal fan 500' Out of the housing 100'.

One end of the second heat dissipation module 400' is in thermal contact with the central processing unit 11' and the graphics chip 12' at the same time, and the other end of the second heat dissipation module 400' is interposed between the second centrifugal fan 600' and the second through hole 132' . The second heat dissipation module 400' absorbs the heat energy generated by the central processing unit 11' and the graphics chip 12', and passes the airflow generated by the second centrifugal fan 600' to pass the heat energy absorbed by the second heat dissipation module 400' through the second heat dissipation module 400'. The through hole 132' discharges out of the casing 100'.

The air flow path generated by the first centrifugal fan 500' and the second centrifugal fan 600' is that the air from the outside is sucked into the housing 100' by a plurality of ventilation holes 121', and then flows toward the first centrifugal fan 500' and the first centrifugal fan 500'. The second centrifugal fan 600' moves, and then the air discharged by the first centrifugal fan 500' and the second centrifugal fan 600' flows out of the casing 100' through the first through hole 131' and the second through hole 132' .

However, the heat dissipation structure of the existing mobile computing device can only dissipate heat for the central processing unit 11' and the graphics chip 12'. As for the memory 13' between the first centrifugal fan 500' and the second centrifugal fan 600', the heat dissipation effect is not good, and this is because the position of the memory 13' lacks or even has no airflow path to pass through, Therefore, the thermal energy of the memory 13' will not be easily dissipated. In this way, the temperature of the memory 13 ′ and the air around the memory 13 ′ will continue to rise, causing the system of the mobile computing device to crash easily, and even cause the memory 13 ′ to be damaged.

In addition, the first centrifugal fan 500' and the second centrifugal fan 600' independently form airflow paths with the vent holes 121', so the heat-generating elements that are not on these airflow paths tend to accumulate heat on the adjacent bottom plate, making Local base plate temperature is too high.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a mobile computing device, so as to solve the problem that the cooling effect of the dual-fan configuration of the existing mobile computing device is not significant, causing the system of the mobile computing device to easily overheat and cause the system to crash.

The mobile computing device disclosed in the present invention includes a casing, a circuit board, a first heat dissipation module, a centrifugal fan for exhaust and a centrifugal fan for convection. Wherein, the housing includes a top plate, a bottom plate and a side plate connecting the bottom plate and the top plate opposite to each other, and the side plate has a first through hole. The circuit board is located between the top board, the bottom board and the side boards, and the circuit board has a first heating device. The first heat dissipation module has a first heat absorption end and a first heat dissipation end, and the first heat absorption end is in thermal contact with the first heat generating device. The exhaust centrifugal fan has a first exhaust port, and the first cooling end is located between the first exhaust port and the first through hole, so that the exhaust centrifugal fan exhausts to the outside of the casing. In addition, the centrifugal fan for convection is disposed in the housing and exhausts air toward a first direction, so that the centrifugal fan for convection exhausts air into the housing.

The mobile computing device disclosed in the present invention includes a shell, a circuit board, a first heat dissipation module, a centrifugal fan with a cover and a centrifugal fan without a cover. Wherein, the housing includes a top plate, a bottom plate and a side plate connecting the bottom plate and the top plate opposite to each other, and the side plate has a first through hole. The circuit board is located between the top board, the bottom board and the side boards, and the circuit board has a first heating device. The first heat dissipation module has a first heat-absorbing end and a first heat-dissipating end, and the first heat-absorbing end is in thermal contact with the first heat generating device. The centrifugal fan with a cover body has a first exhaust port, and the first cooling end is interposed between the first exhaust port and the first through hole, so that the centrifugal fan with a cover body exhausts air to the outside of the casing. The centrifugal fan without a cover body is arranged in the casing, and the centrifugal fan without a cover body includes a second base, a second centrifugal fan blade and a second motor. Wherein, the second centrifugal fan blade is located on the second base. The second motor is connected to the second centrifugal fan blade and is located between the second centrifugal fan blade and the second base. Part of the airflow generated by the second centrifugal fan blade flows toward a first direction, so that the centrifugal fan without a cover body exhausts air into the casing.

The mobile computing device disclosed in the present invention includes a shell, a circuit board, a first heat dissipation module, a centrifugal fan with a cover and a centrifugal fan without a cover. The casing includes a top plate, a bottom plate and a side plate connecting the bottom plate and the top plate opposite to each other, and the side plate has a first through hole. The circuit board is located between the top board, the bottom board and the side boards, and the circuit board has a first heating device. The first heat dissipation module has a first heat absorption end and a first heat dissipation end, and the first heat absorption end is in thermal contact with the first heat generating device. The centrifugal fan with a cover body has a first exhaust port, and the first cooling end is located between the first exhaust port and the first through hole, so that the centrifugal fan with a cover body exhausts air to the outside of the casing. The centrifugal fan without a cover is arranged in the shell, and the centrifugal fan without a cover is basically composed of a second base, a second centrifugal blade and a second motor. Wherein, the second centrifugal fan blade is located on the second base. The second motor is connected to the second centrifugal fan blade and is located between the second centrifugal fan blade and the second base. Wherein, part of the airflow generated by the second centrifugal fan blade flows toward a first direction, so that the centrifugal fan without a cover body exhausts air into the casing.

According to the above-mentioned mobile computing device disclosed in the present invention, the present invention uses a centrifugal fan for convection to exhaust air toward the casing, so that forced convection is generated inside the mobile computing device, so that the hot air in the mobile computing device will not stagnate at a certain point. area. In this way, the electronic components located in this specific area can operate at a lower operating temperature compared to the prior art, since the hot air located in this specific area is continuously replaced by cooler air from other areas . Therefore, such a mobile computing device has a better heat dissipation effect than the existing mobile computing device, so that the overall system stability of the mobile computing device is better improved.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1A is a schematic structural diagram of an existing mobile computing device;

FIG. 1B is a structural perspective view of an existing mobile computing device;

FIG. 2A is a schematic structural diagram of a mobile computing device according to an embodiment of the present invention;

2B is a structural perspective view of a mobile computing device according to an embodiment of the present invention;

2C is a schematic structural view of a centrifugal fan for exhaust and a centrifugal fan for convection according to an embodiment of the present invention;

FIG. 3A is a schematic structural diagram of a mobile computing device according to another embodiment of the present invention;

3B is a structural perspective view of a mobile computing device according to another embodiment of the present invention;

FIG. 3C is a schematic structural view of a centrifugal fan for convection according to another embodiment of the present invention.

Among them, reference signs

10 Mobile Computing Devices

11 The first heating device

11' central processing unit

12 second heating device

12' graphics chip

13 heating module

13' memory

100, 100' housing

110, 110' top plate

120, 120' base plate

121, 121' air vent

122 The third through hole

130, 130' side panels

131, 131' the first through hole

132, 132' the second through hole

200, 200' circuit board

300, 300' the first cooling module

310 first heat sink end

320 first cooling end

400, 400' second cooling module

410 second heat sink end

420 second cooling end

500 centrifugal fan for exhaust

500′ first centrifugal fan

510 first base

511 first surface

512 first cover body

513 first exhaust port

515 first air intake

520 first centrifugal fan blade

530 first motor

600 centrifugal fan for convection

600′ second centrifugal fan

610 second base

611 second surface

612 second cover body

613 second exhaust port

614 third exhaust port

615 second air inlet

620 second centrifugal fan blade

630 second motor

700 deflector

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

Please refer to FIG. 2A to FIG. 2C, FIG. 2A is a schematic structural diagram of a mobile computing device according to an embodiment of the present invention, FIG. 2B is a perspective view of the structure of a mobile computing device according to an embodiment of the present invention, and FIG. Structural schematic diagrams of a centrifugal fan for exhaust and a centrifugal fan for convection according to an embodiment of the present invention.

The mobile computing device 10 of this embodiment can be a general notebook computer or a tablet computer. The mobile computing device 10 includes a casing 100 , a circuit board 200 , a first cooling module 300 , a centrifugal fan 500 for exhaust and a centrifugal fan 600 for convection.

The casing 100 of this embodiment includes a top plate 110 , a bottom plate 120 facing each other, and a side plate 130 connecting the bottom plate 120 and the top plate 110 . The side plate 130 has a first through hole 131 . In addition, the bottom plate 120 may also have a plurality of ventilation holes 121 .

The circuit board 200 is disposed in the casing 100 , that is, the circuit board 200 is located between the top board 110 , the bottom board 120 and the side board 130 . Wherein, the circuit board 200 may have a first heating device 11 , and the first heating device 11 may be a central processing unit (CPU) of the mobile computing device 10 . It should be noted that although in this embodiment, the first heat generating device 11 is illustrated as a central processing unit, this embodiment is not intended to limit the type of the first heat generating device 11 of the present invention. In other embodiments according to the present invention, the first heating device 11 can also be any electronic unit on the circuit board 200 that has a heating phenomenon.

Please continue to refer to FIG. 2B , the first heat dissipation module 300 of this embodiment has a first heat sink end 310 and a first heat dissipation end 320 . Wherein, the first heat dissipation module 300 may be, but not limited to, a composition of heat pipes and heat dissipation fins. The first heat sink end 310 of the first heat dissipation module 300 is in thermal contact with the first heat generating device 11 . Furthermore, through the thermal contact between the first heat sink end 310 and the first heat generating device 11 , the heat energy generated by the first heat generating device 11 can be transferred to the first heat dissipation module 300 .

Please refer to FIG. 2A to FIG. 2C at the same time. The centrifugal fan 500 for exhaust is disposed on the circuit board 200 . The centrifugal fan 500 for exhaust in this embodiment is a centrifugal fan with a cover. The exhaust centrifugal fan 500 includes a first base 510 , a first centrifugal fan blade 520 and a first motor 530 . Wherein, the first base 510 has a first surface 511 and a first cover 512 erected on the first surface 511 . The first centrifugal fan blade 520 is located on the first surface 511 , the first motor 530 is connected to the first centrifugal fan blade 520 , and the first motor 530 is located between the first centrifugal fan blade 520 and the first surface 511 .

In addition, the first cover body 512 accommodates the first centrifugal fan blade 520 and the first motor 530 in the accommodating space formed by the first cover body 512 and the first base 510 . The first cover 512 has a first exhaust port 513 and a first air intake port 515 . Wherein, the first exhaust port 513 corresponds to the first through hole 131 , so that the airflow discharged through the first exhaust port 513 can be discharged out of the casing 100 through the first through hole 131 .

In addition, the first air inlet 515 faces the bottom plate 120 and is covered by the bottom plate 120 , and there is a gap between the bottom plate 120 and the first air inlet 515 . In this way, when the centrifugal fan 500 for exhaust is operating, the centrifugal fan 500 for exhaust can suck the gas inside the mobile computing device 10 into the centrifugal fan 500 for exhaust.

Moreover, the first heat dissipation end 320 of the first heat dissipation module 300 is interposed between the first exhaust port 513 of the exhaust centrifugal fan 500 and the first through hole 131 . In other words, the first cooling end 320 is located on the flow path of the gas flowing toward the first through hole 131 generated by the exhaust centrifugal fan 500 .

When the exhaust centrifugal fan 500 is running, the airflow outside the casing 100 flows into the casing 100 through the plurality of ventilation holes 121 of the bottom plate 120 . The air flow in the casing 100 enters and exits the centrifugal fan 500 for exhaust through the first air inlet 515 and the first exhaust port 513 of the centrifugal fan 500 for exhaust. The exhaust port 513 discharges and blows to the first cooling end 320 to dissipate heat from the first cooling end 320 .

After the airflow discharged from the first exhaust port 513 exchanges heat with the first cooling end 320 , it is then discharged to the outside of the casing 100 through the first through hole 131 . Therefore, through the arrangement of the first heat dissipation module 300 and the exhaust centrifugal fan 500 , the heat energy generated by the first heat generating device 11 can be discharged to the outside of the casing 100 .

The convection centrifugal fan 600 of this embodiment is disposed in the housing 100 and located on the circuit board 200 . Furthermore, the convection centrifugal fan 600 includes a second base 610 , a second centrifugal fan blade 620 and a second motor 630 . Wherein, the second base 610 has a second surface 611 and a second cover 612 erected on the second surface 611 . The second centrifugal fan blade 620 is located on the second surface 611 , the second motor 630 is connected to the second centrifugal fan blade 620 , and the second motor 630 is located between the second centrifugal fan blade 620 and the second surface 611 .

In addition, the second cover 612 accommodates the second centrifugal fan blade 620 and the second motor 630 in the containing space formed by the second cover 612 and the second base 610 . The second cover 612 has a second air outlet 613 and a second air inlet 615 . Wherein, the second exhaust port 513 faces inside the mobile computing device 10 .

In this embodiment, the second exhaust port 513 faces a first direction D1, wherein the first direction D1 is the direction from the convection centrifugal fan 600 to the exhaust centrifugal fan 500, which means the second exhaust port 613 faces the centrifugal fan 500 for exhaust, so that the centrifugal fan 600 for convection is exhausted in the first direction D1 and part of the gas discharged by the centrifugal fan 600 for convection can be sucked into the exhaust gas through the first air inlet 515. Centrifugal fan 500 for gas.

The second air inlet 615 faces the bottom plate 120 and is covered by the bottom plate 120 , and there is a gap between the bottom plate 120 and the second air inlet 615 . In this way, it can be ensured that the second air inlet 615 will not be blocked by the bottom plate 120 , so that the air can smoothly enter the convection centrifugal fan 600 through the second air inlet 615 .

In addition, in this embodiment, a heating module 13 can also be arranged between the centrifugal fan 500 for exhaust and the centrifugal fan 600 for convection, so that the heating module 13 is located between the centrifugal fan 600 for convection and the centrifugal fan for exhaust. On the airflow path of the fan 500, the heating module 13 is, for example, a memory card.

In this way, in this embodiment, the heat generated by the heating module 13 can be removed through the air flow from the convection centrifugal fan 600 to the exhaust centrifugal fan 500 . Therefore, this embodiment can prevent the hot air heated by the heating module 13 from accumulating around the heating module 13 , thereby preventing the temperature of the heating module 13 from continuously increasing. Afterwards, the hot air after heat exchange with the heating module 13 flows into the exhaust centrifugal fan 500 through the first air inlet 515 , and is discharged out of the casing 100 by the operation of the exhaust centrifugal fan 500 .

Furthermore, the mobile computing device 10 of this embodiment can further include a second heat dissipation module 400 , the second cover 612 can also have a third exhaust port 614 , and the side plate 130 can also have a second through hole 132 . The second heat dissipation module 400 has a second heat sink end 410 and a second heat dissipation end 420 . Wherein, the second heat dissipation module 400 may be, but not limited to, a composition of heat pipes and heat dissipation fins. In addition to being in thermal contact with the first heat generating device 11, the second heat absorbing end 410 of the second heat dissipation module 400 can also be in thermal contact with a second heat generating device 12 of the circuit board 200, wherein the second heat generating device 12 is, for example, a graphics chip (Graphics processing unit, GPU).

The third exhaust port 614 of the second cover body 612 faces a second direction D2. The second direction D2 is the direction from the convection centrifugal fan 600 toward the second through hole 132, that is, the third exhaust port 614 faces the second through hole 132, so that the convection centrifugal fan 600 is arranged toward the second direction D2. gas. The second heat dissipation end 420 of the second heat dissipation module 400 is located between the second through hole 132 and the third exhaust port 614 .

Furthermore, through the thermal contact between the second heat-absorbing end 410 and the second heat-generating device 12 and the first heat-generating device 11 at the same time, the heat energy generated by the first heat-generating device 11 and the second heat-generating device 12 can be transferred to the The second heat dissipation module 400 . The second cooling end 420 is located on the flow path of the gas flowing in the second direction D2 generated by the centrifugal fan 600 for convection.

Therefore, when the centrifugal fan 600 for convection operates, the airflow in the housing 100 enters the centrifugal fan 600 for convection through the second air inlet 615 of the centrifugal fan 600 for convection. Afterwards, the centrifugal fan 600 for convection not only discharges the gas from the second exhaust port 613 , but also the centrifugal fan 600 for convection discharges air through the third exhaust port 614 . The airflow discharged from the third exhaust port 614 flows in the second direction D2 and passes through the second cooling end 420 to exchange heat with the second cooling end 420 . After the airflow discharged from the third exhaust port 614 exchanges heat with the second cooling end 420 , it is then discharged to the outside of the housing 100 through the second through hole 132 .

It should be noted that, in this embodiment, the second heat-absorbing end 410 is in thermal contact with the second heat-generating device 12 and the first heat-generating device 11 at the same time, but the arrangement of the second heat-absorbing end 410 is not intended to limit this embodiment. invention. For example, in another embodiment of the present invention, the second heat-absorbing end 410 may only be in thermal contact with the second heat-generating device 12 , but not in thermal contact with the first heat-generating device 11 .

Therefore, through the setting of the second heat dissipation module 300 and the centrifugal fan 600 for convection, in addition to discharging the heat energy generated by the first heat generating device 11 and the second heat generating device 12 to the outside of the casing 100, the heat generating module 13 can also be heated at the same time. Heat dissipation. Therefore, such a mobile computing device 10 can generate airflow in the casing 100 to achieve the effect of heat convection, and thus can take into account the heat dissipation effect of the multiple heating units inside the mobile computing device 10 .

3A to 3C, FIG. 3A is a schematic structural diagram of a mobile computing device according to another embodiment of the present invention, FIG. 3B is a perspective view of the structure of a mobile computing device according to another embodiment of the present invention, and FIG. 3C is a schematic structural view of a centrifugal fan for convection according to another embodiment of the present invention.

The structure of the mobile computing device 10 in another embodiment of the present invention is similar to the embodiment shown in FIG. 2A to FIG. 2C , so the same structure will not be described in detail. Wherein, the same reference numerals in FIG. 3A to FIG. 3C and FIG. 2A to FIG. 2C represent similar objects.

The mobile computing device 10 includes a casing 100 , a circuit board 200 , a first cooling module 300 , a centrifugal fan 500 for exhaust and a centrifugal fan 600 for convection. In addition, the mobile computing device 10 may further include a second cooling module 400 .

The casing 100 of this embodiment includes a top plate 110 , a bottom plate 120 opposite to each other, and a side plate 130 connecting the bottom plate 120 and the top plate 110 . In addition to the plurality of ventilation holes 121 , the bottom plate 120 also has a third through hole 122 .

The circuit board 200 is disposed in the casing 100 , that is, the circuit board 200 is located between the top board 110 , the bottom board 120 and the side board 130 . Wherein, the circuit board 200 may have a first heating device 11 , a second heating device 12 and a heating module 13 .

The first heat dissipation module 300 of this embodiment has a first heat sink end 310 and a first heat dissipation end 320 , and the first heat sink end 310 of the first heat dissipation module 300 is in thermal contact with the first heat generating device 11 .

The centrifugal fan 500 for exhaust is arranged on the circuit board 200. The centrifugal fan 500 for exhaust in this embodiment is a centrifugal fan with a cover, and its structure is roughly the same as that of the centrifugal fan 500 for exhaust in FIG. 2C. .

In addition, the first heat dissipation end 320 of the first heat dissipation module 300 is interposed between the first exhaust port 513 of the exhaust centrifugal fan 500 and the first through hole 131 . In other words, the first cooling end 320 is located on the flow path of the gas flowing toward the first through hole 131 generated by the exhaust centrifugal fan 500 .

The convection centrifugal fan 600 of this embodiment is disposed in the casing 100 and located on the circuit board 200 , and the heating module 13 is located between the convection centrifugal fan 600 and the exhaust centrifugal fan 500 . Furthermore, the centrifugal fan 600 for convection in this embodiment is a centrifugal fan without a cover. The convection centrifugal fan 600 is basically composed of a second base 610 , a second centrifugal blade 620 and a second motor 630 . Wherein, the second base 610 has a second surface 611 . In addition, the second centrifugal fan blade 620 is located on the second surface 611 , and the third through hole 122 exposes part of the second centrifugal fan blade 620 . The second motor 630 is connected to the second centrifugal blade 620 and is located between the second centrifugal blade 620 and the second surface 611 . In detail, the second base 610 does not have a cover structure standing thereon, so the second centrifugal fan blade 620 is not covered by the second base 610 . Since the second centrifugal fan blade 620 is not covered by the second base 610, the convection centrifugal fan 600 can at least face a first direction D1 of the exhaust centrifugal fan 500 and the second through hole 132. Exhaust in a second direction D2. In addition, the centrifugal fan 600 for convection can also discharge air in other directions inside the casing 100 , such as a third direction D3 , a fourth direction D4 and a fifth direction D5 as shown in FIG. 3B .

The second heat dissipating module 400 of this embodiment has a second heat absorbing end 410 and a second heat dissipating end 420, and the second heat absorbing end 410 of the second heat dissipating module 400 is connected with the second heat generating device 12 and the first heat generating device 11 at the same time. thermal contact.

In addition, the second heat dissipation end 420 of the second heat dissipation module 400 is located between the third exhaust port 614 and the second through hole 132 . In other words, the second cooling end 420 is located on the flow path of the gas flowing in the second direction D2 generated by the centrifugal fan 600 for convection. When the centrifugal fan 600 for convection is running, the airflow outside the casing 100 can directly flow into the centrifugal fan 600 for convection through the third through hole 122 of the bottom plate 120 . The convection centrifugal fan 600 discharges the airflow in all directions inside the casing 100 , such as the first direction D1 , the second direction D2 , the third direction D3 , the fourth direction D4 and the fifth direction D5 as shown in FIG. 3B .

Wherein, the airflow flowing in the first direction D1 flows through the heating module 13 to exchange heat with the heating module 13 , thereby removing the heat energy generated by the heating module 13 . The airflow after heat exchange with the heating module 13 flows into the exhaust centrifugal fan 500 through the first air inlet 515 , and is exhausted out of the casing 100 by the operation of the exhaust centrifugal fan 500 .

Wherein, the airflow flowing in the second direction D2 passes through the second heat dissipation end 420 to exchange heat with the second heat dissipation end 420 , and then is discharged to the outside of the housing 100 through the second through hole 132 .

In addition, the airflow flowing in the third direction D3 , the fourth direction D4 and the fifth direction D5 passes through other heat generating units inside the casing 100 to exchange heat with other heat generating units. The airflow after heat exchange with other heating units flows into the exhaust centrifugal fan 500 through the first air inlet 515 , and is exhausted out of the housing 100 by the operation of the exhaust centrifugal fan 500 .

It should be noted that the mobile computing device 10 of this embodiment has the second heat dissipation module 400 , but this feature is not intended to limit the present invention. For example, in another embodiment of the present invention, the mobile computing device 10 may not have the second heat dissipation module 400, and the second heat generating device 12 and the heat generating module 13 may be generated in the casing 100 by the centrifugal fan 600 for convection. Forced convection for heat exchange, and the airflow after absorbing heat energy is discharged out of the housing 100 through the centrifugal fan 500 for exhaust.

Furthermore, in order to allow the partial airflow generated by the centrifugal fan 600 for convection to smoothly flow to the centrifugal fan 500 for exhaust along the first direction D1, this embodiment can also combine the centrifugal fan 500 for exhaust and the centrifugal fan 500 for convection. A plurality of deflectors 700 extending from the exhaust centrifugal fan 500 toward the convection centrifugal fan 600 are disposed between the centrifugal fans 600 . In this embodiment, the deflector 700 is disposed in the mobile computing device 10 and stands on the bottom plate 120 . Since the gas discharged from the centrifugal fan 600 for convection is guided by the deflector 700 and then blows through the heating module 13, and then flows to the centrifugal fan 500 for exhaust. Therefore, the deflector 700 of this embodiment not only has In addition to the advantage that the gas discharged from the centrifugal fan 600 for convection flows more smoothly to the centrifugal fan 500 for exhaust, the heat dissipation effect on the heating module 13 can be enhanced.

It is worth mentioning that the above table is the temperature test comparison data of the existing mobile computing device provided by the present invention and the mobile computing device of this embodiment. It can be seen from the above table that the temperature of the heating module 13 of the mobile computing device 10 in this embodiment is significantly lower by 6.2°C compared with the existing mobile computing device. The temperature of the airflow discharged from the third exhaust port 614 to the second through hole 132 also drops from 39.8°C to 29.2°C. It can be seen from this that the mobile computing device 10 of this embodiment has a lower overall system temperature than the conventional mobile computing device. In other words, the mobile computing device 10 of this embodiment has a better heat dissipation effect.

According to the mobile computing device of the above-mentioned embodiments, the exhaust direction of the centrifugal fan for convection is toward the inside of the casing, so that the inside of the mobile computing device generates heat convection due to air circulation. Through heat convection inside the mobile computing device, heat energy generated by all heating elements inside the mobile computing device can be discharged out of the casing. Therefore, such a mobile computing device has a better heat dissipation effect than the existing mobile computing device, so that the overall system stability of the mobile computing device is better improved.

And, because the centrifugal fan for convection can be a centrifugal fan without a cover body, the fan blade of the centrifugal fan for convection can avoid the disturbance of the airflow produced by the fan blade by the cover body during operation. Relatively reduce the noise generated by the operation of the fan blades. In this way, under a certain noise standard, the centrifugal fan without a cover can have a higher speed than the centrifugal fan with a cover, so as to provide better heat dissipation effect.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (10)

1. A mobile computing device, comprising: A housing, including a top plate, a bottom plate opposite to each other, and a side plate connecting the bottom plate and the top plate, the side plate has a first through hole; a circuit board, located between the top board, the bottom board and the side board, the circuit board has a first heating device; A first heat dissipation module, having a first heat-absorbing end and a first heat-dissipating end, the first heat-absorbing end is in thermal contact with the first heat generating device; A centrifugal fan for exhaust has a first exhaust port, and the first heat dissipation end is between the first exhaust port and the first through hole, so that the centrifugal fan for exhaust can exhaust to outside the enclosure; and The centrifugal fan for convection is arranged in the housing, and exhausts air toward a first direction, so that the centrifugal fan for convection exhausts the air into the housing. 2. The mobile computing device according to claim 1, wherein the centrifugal fan for convection comprises: A second base has a second surface and a second cover standing on the second surface, the second cover has a second exhaust port, and the second exhaust port faces the exhaust centrifugal a fan, so that the centrifugal fan for convection exhausts air toward the first direction; a second centrifugal blade on the second surface; and A second motor is connected to the second centrifugal fan blade and located between the second centrifugal fan blade and the second surface. 3 . The mobile computing device according to claim 2 , wherein the bottom plate has a third through hole, and the third through hole exposes part of the second centrifugal fan blade. 4 . 4. The mobile computing device according to claim 1, further comprising a second heat dissipation module having a second heat sink end and a second heat sink end, the circuit board having a The second heat generating device in thermal contact with the end plate, the side plate has a second through hole, and the convection centrifugal fan also exhausts air toward a second direction, wherein the second direction is toward the second through hole, so that The centrifugal fan for convection exhausts air to the outside of the housing, and the second cooling end is located on the flow path of the gas flowing in the second direction generated by the centrifugal fan for convection, and the first direction is toward the The exhaust centrifugal fan is such that the gas generated by the convective centrifugal fan and flowing in the first direction flows toward the exhaust centrifugal fan. 5. The mobile computing device according to claim 1, further comprising a plurality of deflectors located between the centrifugal fan for exhaust and the centrifugal fan for convection, and from the centrifugal fan for convection The fan extends toward the exhaust centrifugal fan. 6. A mobile computing device, comprising: A housing, including a top plate, a bottom plate opposite to each other, and a side plate connecting the bottom plate and the top plate, the side plate has a first through hole; a circuit board, located between the top board, the bottom board and the side board, the circuit board has a first heating device; A first heat dissipation module, having a first heat-absorbing end and a first heat-dissipating end, the first heat-absorbing end is in thermal contact with the first heat generating device; A centrifugal fan with a cover body has a first exhaust port, and the first cooling end is interposed between the first exhaust port and the first through hole so that the centrifugal fan with a cover body exhausts air to outside the enclosure; and A centrifugal fan without a cover is arranged in the housing, and the centrifugal fan without a cover includes: a second base; a second centrifugal blade located on the second base; and a second motor connected to the second centrifugal fan blade and located between the second centrifugal fan blade and the second base, wherein part of the airflow generated by the second centrifugal fan blade faces a first direction flow so that the shroudless centrifugal fan exhausts into the housing interior. 7. The mobile computing device according to claim 6, further comprising a second heat dissipation module having a second heat sink end and a second heat sink end, the circuit board having a The second heating device in thermal contact with the end, the side plate has a second through hole, and part of the airflow generated by the second centrifugal fan blade flows towards a second direction, and the second direction is through the second heat dissipation The end faces the second through hole, so that the centrifugal fan without a cover is exhausted to the outside of the casing, and part of the airflow generated by the second centrifugal fan blade flows toward the first direction, and the first direction The flowing air flows to the centrifugal fan with a shroud. 8 . The mobile computing device according to claim 7 , wherein the bottom plate has a third through hole, and the third through hole exposes a part of the centrifugal fan blade. 9. The mobile computing device according to claim 6, further comprising a plurality of deflectors, located between the centrifugal fan with a cover and the centrifugal fan without a cover, and from the centrifugal fan without a cover The centrifugal fan extends toward the shrouded centrifugal fan. 10. A mobile computing device, comprising: A housing, including a top plate, a bottom plate opposite to each other, and a side plate connecting the bottom plate and the top plate, the side plate has a first through hole; a circuit board, located between the top board, the bottom board and the side board, the circuit board has a first heating device; A first heat dissipation module, having a first heat-absorbing end and a first heat-dissipating end, the first heat-absorbing end is in thermal contact with the first heat generating device; A centrifugal fan with a cover body has a first exhaust port, and the first cooling end is interposed between the first exhaust port and the first through hole so that the centrifugal fan with a cover body exhausts air to outside the enclosure; and A centrifugal fan without a cover is arranged in the casing, and the centrifugal fan without a cover basically consists of the following components: a second base; a second centrifugal blade located on the second base; and a second motor connected to the second centrifugal fan blade and located between the second centrifugal fan blade and the second base, wherein part of the airflow generated by the second centrifugal fan blade faces a first direction flow so that the shroudless centrifugal fan exhausts into the housing interior.

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