CN102595855B - Heat sink and display unit with stacked fans - Google Patents

Abstract

A heat sink with stacked fans comprises a centrifugal fan and an axial flow fan, wherein the axial flow fan is arranged on one side of the centrifugal fan so that airflow blown out by the axial flow fan is blown to the centrifugal fan. Therefore, the centrifugal fan and the axial flow fan can operate at lower rotating speed, and the noise generated by the integral radiator is reduced.

Description

Heat sink and display unit with stacked fans

【Technical field】

The present invention mainly relates to a radiator, especially a radiator with stacked fans.

【Background technique】

Due to the rapid development of technologies such as 3D animation and video games, computer systems need more efficient graphics cards to process huge amounts of data, which also causes the graphics card to generate a huge amount of heat. In order to solve the heat dissipation problem of the display card, a heat dissipation module is usually installed on the display card.

Please refer to FIG. 1 , which is a perspective view of a known display device. The display device 1a includes a display card 2a and a heat dissipation module 3a. The heat dissipation module 3a is arranged on the display card 2a. A centrifugal fan 4a is arranged in the heat dissipation module 3a. The centrifugal fan 4a is used to rotate rapidly along a first The airflow direction D1 sucks in air, and then the air flows out from around the centrifugal fan 4a, and blows to the heat dissipation fins (not shown) inside the heat dissipation module 3a to help the display card 2a dissipate heat.

However, since the current display card 2a generates too much heat, it is necessary to increase the rotational speed of the centrifugal fan 4a in order to achieve the cooling performance required by the display card 2a. However, when the rotational speed of the centrifugal fan 4a increases, the noise generated by the centrifugal fan 4a will increase sharply, which will cause noise disturbance to users.

【Content of invention】

When the rotating speed of the known centrifugal fan is very high, the centrifugal fan will not be able to suck in enough air, resulting in low air pressure inside the centrifugal fan, thereby affecting the air output of the centrifugal fan. Also because the air output at high speed cannot be effectively increased, the centrifugal fan needs to further increase the speed to increase the air output, but this will also increase the noise level.

In order to solve the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a radiator with stacked fans, which includes a centrifugal fan and an axial fan, and the axial fan is stacked on one side of the centrifugal fan , so that the airflow blown by the axial flow fan blows to the centrifugal fan, so as to increase the air pressure inside the centrifugal fan, so that the centrifugal fan can increase the air output without further increasing the rotating speed. Therefore, the present invention can operate the centrifugal fan and the axial fan at a lower speed, thereby reducing the noise produced by the overall radiator.

In order to achieve the above object, the present invention provides a heat sink with stacked fans, which includes a centrifugal fan and an axial fan, and may further include an outer shell with an accommodating space inside. The centrifugal fan is arranged in the accommodating space inside the outer casing, and has an air inlet side. The axial flow fan is pivotally connected to the outside of the outer casing and the air inlet side of the centrifugal fan. Among them, the axial flow fan can be selectively driven. When the axial flow fan is driven, the airflow blown by the axial flow fan is blown to the air inlet side of the centrifugal fan. The axis of rotation rotates.

In order to achieve the above object, the present invention further provides a display device, which includes a display card, a centrifugal fan, and an axial fan. The display card has a heating element, the centrifugal fan has an air inlet side, and the centrifugal fan is arranged on the side of the display card with the heating element, the airflow generated by the centrifugal fan enters from the air inlet side and guides the display card to the display card heat dissipation on the chip. The axial flow fan is arranged on the air inlet side of the centrifugal fan, wherein the airflow blown by the axial flow fan blows to the air inlet side of the centrifugal fan.

To sum up, since the air pressure inside the centrifugal fan can be increased by the axial fan, compared with the prior art, the centrifugal fan can more easily inhale air at the same speed and generate more output. Air volume. Therefore, the axial flow fan and the centrifugal fan of the present invention can adopt a relatively small rotating speed to achieve a better heat dissipation effect, and further effectively reduce the noise generated by the overall radiator to reduce noise disturbance to users.

【Description of drawings】

1 is a perspective view of a known display device;

2 is a perspective view of a display device of the present invention;

3 is an exploded view of the display device of the present invention; and

FIG. 4 is a schematic cross-sectional view of a display device of the present invention.

【detailed description】

Please refer to FIG. 2 and FIG. 3 , FIG. 2 is a perspective view of the display device 100 of the present invention, and FIG. 3 is an exploded view of the display device 100 of the present invention. The display device 100 includes a display card 1 and a heat sink 2 with stacked fans. The display card 1 includes a heating element 11, and the heating element 11 can be a processing chip. The heat sink 2 with stacked fans is disposed on the side of the display card 1 with the processing chip 11 . The heat sink 2 includes an outer shell 3 , a centrifugal fan 4 , and an axial fan 5 .

The outer casing 3 may further include a first casing 31 and a second casing 32 , the first casing 31 is disposed on one side of the display card 1 . The first housing 31 has a first installation portion 311 and a second installation portion 312 . The second casing 32 covers the first casing 31 and forms an accommodating space S1 between the first casing 31 and the second casing 32 . In other words, there is an accommodating space S1 inside the outer casing, and the first installation part 311 and the second installation part 312 are located in the accommodating space S1 . In another embodiment, the first casing 31 and the second casing 32 can be integrally formed.

In this embodiment, a fin unit 33 can be disposed on the first mounting portion 311 and accommodated in the accommodating space S1, wherein the fin unit 33 can be composed of a plurality of fins 331, and the fins 331 are connected to each other. Parallel and spaced arrangement.

The second casing 32 has an outer surface 321 and an inner surface 322 , and the outer surface 321 and the inner surface 322 are respectively disposed on two opposite sides of the second casing 32 . An accommodating groove 323 is recessed on the outer surface 321 , and a vent 324 and a pivoting groove 325 are defined at the bottom of the accommodating groove 323 . The vent 324 corresponds to the centrifugal fan 4 and the axial fan 5 . A locking structure 3251 is disposed on a sidewall of the pivotal slot 325 . An opening 326 is defined on the inner surface 322 of the second housing 32 , and the opening 326 communicates with the accommodating space S1 .

The centrifugal fan 4 is disposed in the accommodating space S1 and the second mounting portion 312 inside the housing 3 , so as to be disposed on a side of the display card 1 having the heating element 11 and adjacent to the fin unit 33 . The centrifugal fan 4 is provided with an air inlet side 41 and an installation side 42, the air inlet side 41 and the installation side 42 are respectively arranged on two opposite sides of the centrifugal fan 4, the air inlet side 41 corresponds to the vent 324, and the installation side 42 is arranged In the second mounting portion 312 , the airflow generated by the centrifugal fan 4 flows from the air inlet side 41 toward the heating element 11 . The centrifugal fan 4 includes a centrifugal hub 43 and a plurality of centrifugal blades 44 . The centrifugal fan blades 44 are disposed around the centrifugal hub 43 at intervals. Both the centrifugal hub 43 and the centrifugal fan blade 44 can rotate along a rotation axis AX, and air is sucked in from the air inlet side 41 and blown out from the side of the centrifugal fan blade 44 . The air inlet side 41 and the mounting side 42 extend substantially perpendicular to the axis of rotation AX.

The axial fan 5 can be pivotally connected to the outer casing 3 , and is disposed in the accommodating groove 323 of the second casing 32 , and is located at the air intake side 41 of the centrifugal fan 4 . The axial flow fan 5 is provided with an air inlet surface 51 and an air outlet surface 52. The air inlet surface 51 and the air outlet surface 52 are respectively arranged on two opposite sides of the axial flow fan 5, and can be respectively perpendicular to the rotation axis AX. The wind surface 52 corresponds to the vent 324 and the air intake side 41 of the centrifugal fan 4 .

The axial fan 5 may include a fan casing 53 and an axial fan unit 54 . The fan casing 53 can be disposed in the receiving slot 323 outside the second casing 32 , and the fan casing 53 can also include a pivot portion 531 , and the pivot portion 531 can extend from the air outlet surface 52 . A buckling structure 532 is provided on the side of the pivoting portion 531. The pivoting portion 531 is rotatably disposed in the pivoting groove 325, and the buckling structure 532 is rotatably buckled to the engaging structure 3251, so that the fan housing 53 can It is pivotally connected to the second housing 32 via the pivot portion 531 .

Therefore, the axial fan 5 can be easily installed or disassembled on the outer shell 3 , and the user can choose whether to install the axial fan 5 according to requirements. However, the installation method of the axial flow fan 5 is not limited thereto. The axial flow fan 5 can also be installed in the housing together with the centrifugal fan 4. Any method that can install the axial flow fan 5 relative to the centrifugal fan 4 by screw assembly, bonding, etc. is applicable to the present invention.

In addition, the user can also tilt the axial flow fan 5 relative to the second housing 32 or the centrifugal fan 4, so that the air blown by the axial flow fan 5 can be blown to the area near the radiator 2 and the centrifugal fan 4. The fan 4 further enhances the cooling efficiency of the area near the radiator 2.

It can also be seen from FIG. 2 that the air inlet surface 51 of the fan housing 53 is on the same plane as the outer surface 321 of the second housing 32 . In other words, the fan housing 53 does not protrude from the second housing 32 , can increase the overall appearance of the radiator 2 .

The axial fan unit 54 is disposed in the fan casing 53 and can rotate along the rotation axis AX. The axial fan unit 54 includes an axial hub 541 and a plurality of axial blades 542 . The axial flow hub 541 can rotate along the rotation axis AX, and the axial flow fan blades 542 can radially extend from the sidewall of the axial flow hub 541 . When the axial flow fan unit 54 rotates, air can be sucked in from the air inlet surface 51 and discharged from the air outlet surface 52 .

Please also refer to FIG. 4 , which is a schematic cross-sectional view of the display device 100 of the present invention. When the centrifugal fan 4 and the axial fan 5 rotate along the rotation axis AX, the axial fan 5 can suck air along the first airflow direction D1 parallel to the rotation axis AX to generate the first airflow F1. The first airflow F1 enters the axial fan 5 from the air inlet surface 51 , and is blown out to the axial fan 5 through the air outlet surface 52 . Finally, the first air flow F1 enters the centrifugal fan 4 from the air intake side 41 of the centrifugal fan 4 , thereby increasing the air pressure inside the centrifugal fan 4 .

Afterwards, the centrifugal fan 4 can generate a second airflow F2 along a second airflow direction D2, and the second airflow F2 is blown from the side of the centrifugal fan 4 to the fin unit 33 to help the fin unit 33 dissipate heat. Wherein the second airflow direction D2 is perpendicular to the first airflow direction D1.

In addition, in this embodiment, the axial fan 5 can be selectively driven to save power consumption. For example, when the display card 1 is under low load, since the heat generated by the heating element 11 is not high, the rotating speed of the centrifugal fan 4 itself is not high, and excessive noise will not be generated, so the display card 1 can be used in Under the aforementioned conditions, the axial flow fan 5 is not driven to achieve the purpose of saving energy.

To sum up, since the air pressure inside the centrifugal fan can be increased by the axial fan, the centrifugal fan can absorb air more easily at the same speed as the prior art, thereby generating more air output. Therefore, the axial flow fan and the centrifugal fan of the present invention can adopt a relatively small rotating speed to achieve a better heat dissipation effect, and further effectively reduce the noise generated by the overall radiator to reduce noise disturbance to users.

Claims (10)

1. there is a heating radiator for overlapped fan, it is characterized in that, comprising:

One centrifugal fan, has an inlet side; And

One tubeaxial fan, overlapped in this inlet side of this centrifugal fan;

The air-flow that wherein this tubeaxial fan blows out blows to the inlet side of this centrifugal fan, to increase the air pressure of this centrifugal fan inside.

2. have the heating radiator of overlapped fan as claimed in claim 1, it is characterized in that, wherein this centrifugal fan and this tubeaxial fan all rotate along same turning axle.

3. have the heating radiator of overlapped fan as claimed in claim 1, it is characterized in that, wherein this heating radiator more comprises;

One shell body, it is provided with an accommodation space;

Wherein this centrifugal fan is arranged in this accommodation space, and this tubeaxial fan is arranged at the outside of this shell body.

4. have the heating radiator of overlapped fan as claimed in claim 1, it is characterized in that, wherein this tubeaxial fan is optionally driven.

5. there is the heating radiator of overlapped fan as claimed in claim 3, it is characterized in that, wherein the outside of this shell body is provided with a storage tank, the bottom of this storage tank is provided with a pivot connected slot, this tubeaxial fan is provided with an articulated section, this tubeaxial fan is arranged in this storage tank, and this articulated section is arranged in this pivot connected slot.

6. have the heating radiator of overlapped fan as claimed in claim 5, it is characterized in that, wherein the bottom of this storage tank is provided with a ventilating opening, and this ventilating opening corresponds to this centrifugal fan and this tubeaxial fan.

7. have the heating radiator of overlapped fan as claimed in claim 3, it is characterized in that, more comprise a fin unit, it is arranged at this centrifugal fan place adjacent in accommodation space.

8. a display device, is characterized in that, comprising:

One display card, has a heater element;

One centrifugal fan, has an inlet side, and this centrifugal fan is arranged at the side that this display card has this heater element, and the air-flow that this centrifugal fan produces flows from this inlet side toward this heater element direction; And

One tubeaxial fan, overlapped in this inlet side of this centrifugal fan;

The air-flow that wherein this tubeaxial fan blows out blows to the inlet side of this centrifugal fan, to increase the air pressure of this centrifugal fan inside.

9. display device as claimed in claim 8, it is characterized in that, wherein this centrifugal fan and this tubeaxial fan all rotate along same turning axle.

10. display device as claimed in claim 8, is characterized in that, more comprise a fin unit, and it to be arranged on this display card and to cover this heater element.