TWI898940B - Display card - Google Patents

Abstract

A display card including a chassis, a heat source, a plurality of fins, a heat pipe, a plurality of main fans and an auxiliary fan is provided. The chassis has a first side, a second side opposite to the first side, and an opening communicated with the first side and the second side. The heat source is disposed at the first side of the chassis. The fins are arranged side by side at the first side of the chassis. The heat source is thermally coupled to the fins through the heat pipe. The main fans are disposed on the fins. The auxiliary fan is disposed at the second side of the chassis as corresponding to the opening. A rotation axis of each of the main fans is parallel to a rotation axis of the auxiliary fan.

Description

graphics card

The present invention relates to a display card, and more particularly to a heat dissipation design of a display card.

Discrete graphics cards can provide powerful computing performance and generate a large amount of heat during operation. Therefore, discrete graphics cards are equipped with fans to dissipate heat from heat sources (such as graphics processing chips, memory chips, or other electronic components). Specifically, the heat generated by the heat source can be transferred to the heat sink fins through heat pipes, and the fan can generate airflow through the heat sink fins. More specifically, the fan can draw in cold air and blow it toward the heat sink fins. Then, the cold air exchanges heat with the heat sink fins to form hot air. Finally, the hot air is forced out to prevent the discrete graphics card from overheating and causing performance degradation or failure. However, the heat sink fins may create excessive flow resistance to airflow, resulting in a decline in heat dissipation performance.

The present invention provides a display card with excellent heat dissipation performance.

The present invention provides a graphics card comprising a frame, a heat source, a plurality of heat sink fins, a heat pipe, a plurality of main fans, and an auxiliary fan. The frame has a first side, a second side opposite the first side, and an opening connecting the first side and the second side. The heat source is disposed on the first side of the frame. The plurality of heat sink fins are disposed in parallel on the first side of the frame. The heat source is thermally coupled to the plurality of heat sink fins via a heat pipe. The plurality of main fans are disposed on the plurality of heat sink fins. The auxiliary fans are disposed on the second side of the frame corresponding to the openings. The rotation axis of each main fan is parallel to the rotation axis of the auxiliary fan.

Based on the above, in the graphics card of the present invention, the main fan and the auxiliary fan introduce cold air from two opposite directions to generate a larger air intake volume, which not only improves the heat exchange efficiency, but also overcomes the flow resistance of the heat sink fins to improve the heat dissipation performance.

In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings.

Figures 1A and 1B are schematic diagrams of a graphics card according to an embodiment of the present invention from two different perspectives. Figure 1C is a schematic cross-sectional view taken along line A-A in Figure 1A. Referring to Figures 1A to 1C, in this embodiment, a graphics card 100 includes a frame 110, a heat source 120, a plurality of heat sink fins 130, a heat pipe 140, a first main fan 150, a second main fan 151, a third main fan 152, and an auxiliary fan 160. The first main fan 150, the second main fan 151, and the third main fan 152 are arranged side by side on one side of the frame 110, and the auxiliary fan 160 is arranged on the other side of the frame 110.

Specifically, the frame 110 has a first side 111, a second side 112 opposite the first side 111, and an opening 113 connecting the first and second sides 111 and 112. A heat source 120, which can be a graphics processing chip, a memory chip, or other electronic component, is disposed on the first side 111 of the frame 110. A plurality of heat sink fins 130 are disposed in parallel on the first side 111 of the frame 110, and the heat source 120 is thermally coupled to the plurality of heat sink fins 130 via heat pipes 140.

As shown in Figures 1A and 1C , the first main fan 150, the second main fan 151, and the third main fan 152 form a main fan unit and are installed on the plurality of heat sink fins 130. Furthermore, the heat source 120, the plurality of heat sink fins 130, and the heat pipe 140 are located between the frame 110 and the main fan unit. Specifically, the first main fan 150, the second main fan 151, and the third main fan 152 are used to draw in cool air from the outside and blow it toward the plurality of heat sink fins 130 along a first direction D1.

Auxiliary fan 160 is disposed on second side 112 of frame 110, corresponding to opening 113, and covers opening 113. Specifically, auxiliary fan 160 draws cool air from the outside and blows it toward the plurality of heat sink fins 130 in a second direction D2, which is opposite to first direction D1. In other words, the cool air drawn in by auxiliary fan 160 flows through opening 113 and is blown toward the plurality of heat sink fins 130 in the second direction D2.

Furthermore, the main fan assembly consisting of the first main fan 150, the second main fan 151, and the third main fan 152 and the auxiliary fan 160 respectively introduce cold air from two opposite directions to generate a larger air intake volume, which not only improves the heat exchange efficiency but also overcomes the flow resistance of the heat sink fins 130 to improve the heat dissipation performance.

As shown in Figures 1A and 1C , the first main fan 150, the second main fan 151, and the third main fan 152 each have a first rotation axis 150a, a second rotation axis 151a, and a third rotation axis 152a. The first rotation axis 150a, the second rotation axis 151a, and the third rotation axis 152a are parallel to each other and aligned in a straight line. As shown in Figures 1B and 1C , the auxiliary fan 160 has a fourth rotation axis 160a that is parallel to the first rotation axis 150a, the second rotation axis 151a, and the third rotation axis 152a.

In one example, the third main fan 152 overlaps with the auxiliary fan 160, and the third rotation axis 152a overlaps with the fourth rotation axis 160a. In other words, the third rotation axis 152a of the third main fan 152 and the fourth rotation axis 160a of the auxiliary fan 160 are coaxial. In another example, the third main fan 152 overlaps with the auxiliary fan 160, but the third rotation axis 152a does not overlap with the fourth rotation axis 160a. In other words, the third rotation axis 152a of the third main fan 152 and the fourth rotation axis 160a of the auxiliary fan 160 are non-coaxial.

As shown in Figure 1C , in this embodiment, the frame 110 further comprises a first zone 110a, a second zone 110b, and a third zone 110c located on the first side 111. The second zone 110b is located between the first zone 110a and the third zone 110c. Specifically, the first main fan 150, the second main fan 151, and the third main fan 152 are sequentially distributed in the first zone 110a, the second zone 110b, and the third zone 110c, with the opening 113 connected to the third zone 110c. In addition, the plurality of heat sink fins 130 are distributed in parallel in the first area 110a, the second area 110b and the third area 110c along the arrangement direction D3, and the first rotation axis 150a, the second rotation axis 151a, the third rotation axis 152a and the fourth rotation axis 160a are perpendicular to the arrangement direction D3.

The first rotation axis 150a of the first main fan 150 passes through the first zone 110a. The first main fan 150 is used to draw in cool air from the outside and blow it along the first direction D1 toward the heat dissipation fins 130 distributed in the first zone 110a. The second rotation axis 151a of the second main fan 151 passes through the second zone 110b. The second main fan 151 is used to draw in cool air from the outside and blow it along the first direction D1 toward the heat dissipation fins 130 distributed in the second zone 110b. Furthermore, the third rotation axis 152a of the third main fan 152 passes through the third zone 110c. The third main fan 152 is used to draw in cool air from the outside and blow it along the first direction D1 toward the heat dissipation fins 130 distributed in the third zone 110c. For example, the first direction D1 is parallel to the first rotation axis 150a, the second rotation axis 151a, and the third rotation axis 152a.

As shown in Figure 1C, the fourth rotation axis 160a of the auxiliary fan 160 passes through the opening 113 and the third region 110c. The auxiliary fan 160 is used to draw in cool air from the outside and blow it along the second direction D2 toward the heat sink fins 130 distributed in the third region 110c. For example, the second direction D2 is parallel to the fourth rotation axis 160a.

Furthermore, the third main fan 152 and the auxiliary fan 160 blow cold air toward the heat sink fins 130 distributed in the third area 110c along a first direction D1 and a second direction D2 opposite to the first direction D1, respectively, to increase the air intake of the third area 110c and generate turbulence when the cold air flows through the heat sink fins 130, thereby improving heat dissipation performance.

On the other hand, the third main fan 152 and the auxiliary fan 160 generate a first airflow volume for the third zone 110c, while the first main fan 150 and the second main fan 151 generate second and third airflow volumes, respectively, which are smaller than the first airflow volume, for the first zone 110a and the second zone 110b. Because the airflow in the third zone 110c has greater kinetic energy, it is more conducive to overcoming greater flow resistance. Therefore, the arrangement density or number of heat dissipating fins 130 in the third zone 110c can be designed to be greater than the arrangement density or number of heat dissipating fins 130 in the first zone 110a and the arrangement density or number of heat dissipating fins 130 in the second zone 110b, thereby increasing the heat dissipation area of the local area.

As shown in FIG1C , the arrangement pitch P3 of the heat sink fins 130 in the third region 110c is smaller than the arrangement pitch P1 or the number of heat sink fins 130 in the first region 110a, and the arrangement pitch P2 of the heat sink fins 130 in the second region 110b. In other words, the third region 110c can accommodate a greater number of heat sink fins 130 within a limited space.

As shown in FIG. 1C , in this embodiment, the graphics card 100 further includes a circuit board 170. Specifically, the circuit board 170 is disposed on the first side 111 of the frame 110. The heat source 120 is disposed on the circuit board 170, and the circuit board 170 is distributed between the first region 110a and the second region 110b. In other words, the circuit board 170 does not extend into the third region 110c to avoid blocking the cool air introduced by the auxiliary fan 160.

Figure 2 is a schematic cross-sectional view of a graphics card according to another embodiment of the present invention. Referring to Figure 2 , the design principles of graphics card 100A of this embodiment are substantially the same as those of graphics card 100 of the previous embodiment, with the primary difference being that graphics card 100A of this embodiment does not include third main fan 152 . Instead, the first main fan 150 blows cool air to the first zone 110a, the second main fan 151 blows cool air to the second zone 110b, and the auxiliary fan 160 blows cool air to the third zone 110c.

In summary, in the graphics card of the present invention, the main and auxiliary fans draw in cool air from two different directions, generating a greater airflow. This not only improves heat exchange efficiency but also overcomes the flow resistance of the heat sink fins, thereby enhancing heat dissipation performance. Furthermore, due to the greater airflow, certain areas of the graphics card can increase the density, number, or spacing of the heat sink fins to increase the heat dissipation area.

Although the present invention has been disclosed above by way of embodiments, they are not intended to limit the present invention. Any person having ordinary skill in the art may make slight modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the attached patent application.

100, 100A: Graphics card 110: Frame 110a: First section 110b: Second section 110c: Third section 111: First side 112: Second side 113: Opening 120: Heat source 130: Heat sink 140: Heat pipe 150: First main fan 150a: First rotation axis 151: Second main fan 151a: Second rotation axis 152: Third main fan 152a: Third rotation axis 160: Auxiliary fan 160a: Fourth rotation axis 170: Circuit board A-A: Line segment D1: First direction D2: Second direction D3: Arrangement direction: P1, P2, P3: Arrangement spacing

Figures 1A and 1B are schematic diagrams of a display card according to one embodiment of the present invention from two different viewing angles. Figure 1C is a schematic cross-sectional view taken along line A-A of Figure 1A. Figure 2 is a schematic cross-sectional view of a display card according to another embodiment of the present invention.

100: Graphics card

110: Frame

110a: District 1

110b: District 2

110c District 3

111: First side

112: Second side

113: Opening

120: Heat Source

130: Heat sink fins

140: Heat pipe

150: First main fan

150a: First rotation axis

151: Second main fan

151a: Second rotation axis

152: Third main fan

152a: Third rotation axis

160: Auxiliary fan

160a: Fourth rotation axis

170: Circuit board

D1: First Direction

D2: Second Direction

D3 arrangement direction:

P1, P2, P3: Arrangement spacing

Claims (10)

A graphics card includes: a frame having a first side, a second side opposite the first side, and an opening connecting the first side and the second side; a heat source disposed on the first side of the frame; a plurality of heat sinks disposed in parallel on the first side of the frame; a heat pipe, wherein the heat source is thermally coupled to the heat sinks via the heat pipe; a plurality of main fans disposed on the heat sinks; and auxiliary fans disposed on the second side of the frame corresponding to the opening, wherein the rotation axis of each main fan is parallel to the rotation axis of the auxiliary fan. The display card as described in claim 1, wherein the frame further has a first area, a second area and a third area located on the first side, the second area is located between the first area and the third area, and the opening is connected to the third area. The display card as described in claim 2, wherein the rotation axis of the auxiliary fan passes through the opening and the third area. A display card as described in claim 3, wherein the main fans are distributed in the first zone and the second zone. In the display card of claim 3, the main fans are distributed in the first zone, the second zone, and the third zone, and the rotation axis of one of the main fans distributed in the third zone passes through the third zone. In the display card of claim 5, the rotation axis of a main fan and the rotation axis of the auxiliary fan distributed in the third zone are coaxial or non-coaxial. A display card as described in claim 5, wherein the main fan and the auxiliary fan distributed in the third zone generate a first air intake volume for the third zone, and the other main fans distributed in the first zone and the second zone generate a second air intake volume and a third air intake volume that are smaller than the first air intake volume for the first zone and the second zone, respectively. A graphics card as described in claim 2, wherein the heat sink fins are distributed in the first area, the second area and the third area, and the arrangement density of the portion of the heat sink fins distributed in the third area is greater than the arrangement density of the portion of the heat sink fins distributed in the first area and the arrangement density of the portion of the heat sink fins distributed in the second area. A graphics card as described in claim 2, wherein the heat sink fins are distributed in the first area, the second area and the third area, and the arrangement pitch of the portion of the heat sink fins distributed in the third area is smaller than the arrangement pitch of the portion of the heat sink fins distributed in the first area and the arrangement pitch of the portion of the heat sink fins distributed in the second area. The display card of claim 2 further comprises: A circuit board disposed on the first side of the frame, wherein the heat source is disposed on the circuit board, and the circuit board is distributed between the first area and the second area.