GB2411771A

GB2411771A - Electronic apparatus heat dissipation.

Info

Publication number: GB2411771A
Application number: GB0404447A
Authority: GB
Inventors: Hsiang-Hsi Yang; Chia Ching Lin; Kuo Lung Shih
Original assignee: Giga Byte Technology Co Ltd
Current assignee: Giga Byte Technology Co Ltd
Priority date: 2004-02-27
Filing date: 2004-02-27
Publication date: 2005-09-07
Anticipated expiration: 2024-02-27
Also published as: GB0404447D0; GB2411771B

Abstract

An electronic apparatus comprises a housing 10, a circuit board 11 and a heatsink device 12 mounted between the housing and the circuit board. The heatsink device comprises a 'heatsink plate' 121 and a 'heat conductive plate' 120. The lower surface of the 'heatsink plate' rests on the surface of the housing, while the 'heat conductive plate' is located between the 'heatsink plate' and the circuit board. The 'heat conductive plate' is made of an electrically non-conductive material such as heat conductive rubber, while the 'heatsink plate' is made of a metallic material such as silver, copper or aluminium. First and second heatsink materials 15, 14 may also be provided, located between the 'heatsink plate' and the housing, and between the 'heatsink plate' and the 'heat conductive plate' respectively. These materials may be a 'heatsink paste'.

Description

2411 771

HEAT DISSIPATION METHOD FOR ELECTRONIC APPARATUS

The present invention relates to a heat dissipation method, and more particularly to a heat dissipation method for an electronic apparatus, wherein the heat produced by the heat sources of the circuit board of the electronic apparatus is dissipated largely and rapidly.

The circuit board for a computer is usually provided with a plurality of heat sources, such as the central processing unit (CPU), the north bridge, the south bridge or the like. In practice, the heat sources of the circuit board usually produce a greater heat during operation. A conventional heatsink for the computer comprises a fin type radiator mounted on the heat sources of the circuit board, and a cooling fan mounted in the housing of the computer for dissipating the heat produced by the heat sources of the circuit board. However, the heat produced by the heat sources is transmitted through the fin type radiator into the space of the housing, so that the heatsink effect of the conventional heatsink is limited, thereby decreasing the heat dissipation effect of the computer.

20, - u The primary objective of the present invention is to provide a heat ^;- .- dissipation method for an electronic apparatus, wherein the heat produced by the hent sources of the circuit board is dissipated largely and rapidly.

Another objective of the present invention is to provide an electronic apparatus, wherein the heatsink device is mounted between the housing and the circuit board, so that the heat produced by the heat sources of the circuit board during operation is transmitted from the heat conductive plate to the heatsink plate largely and rapidly and is then carried away from the housing.

A further objective of the present invention is to provide an electronic apparatus, wherein the heatsink device dissipates the heat produced by the heat sources of the circuit board largely and rapidly, thereby enhancing the heat dissipation effect of the electronic apparatus.

In accordance with one embodiment of the present invention, there is provided a heat dissipation method for an electronic apparatus comprising a housing, and a circuit board mounted in the housing, the heat dissipation method comprising the steps of: providing a heatsink plate having a bottom face rested on a surface of the housing; and providing a heat conductive plate having a bottom face rested on a top face of the heatsink plate and a top face rested on a bottom face of the circuit board.

In accordance with another embodiment of the present invention, there is provided an electronic apparatus comprising: a housing; a circuit board mounted in the housing; and a heatsink device mounted between and rested on the housing and the circuit board.

Preferably, the heatsink device includes a heatsink plate having a bottom face rested on a surface of the housing, and a heat conductive plate having a bottom face rested on a top face of the heatsink plate and a top face rested on a bottom face of the circuit board.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

In the drawings: Fig. 1 is a partially cut-away plan cross-sectional view of an electronic apparatus in accordance with the preferred embodiment of the present invention; Fig. 2 is an exploded perspective view of the electronic apparatus in accordance with the preferred embodiment of the present invention; and Fig. 3 is a partially cut-away plan crosssectional assembly view of the electronic apparatus as shown in Fig. 2.

Referring to the drawings and initially to Fig. 1, an electronic S apparatus in accordance with the preferred embodiment of the present invention comprises a housing 10, a circuit board 11 mounted in the housing 10, and a heatsink device 12 mounted between the housing 10 and the circuit board 1 1.

The housing lO is preferably, made of metallic material, such as silver, aluminum, copper or the like.

The circuit board l l has a top face 110 and a bottom face 111. The top face I 10 of the circuit board 11 is provided with a plurality of heat sources 113, such as the central processing unit (CPU) having a specification of P4 3.0G 800F, north bridge, south bridge or the like. A fin type radiator 113a is mounted on one of the heat sources 113.

As shown in Figs. 1-3, the heatsink device 12 includes a heatsink plate 121 having a bottom face 121 b rested on a surface 100 of the housing 10, and a heat conductive plate 120 having a bottom face 1 20b rested on a top face 121a of the heatsink plate 121 and a top face 120a rested on the bottom face 111 of the circuit board 11.

The heat conductive plate 120 is made of a non-conducting material, such as a heat conductive rubber, soft pad or the like.

The heatsink plate 121 is preferably, made of metallic material, such as silver, aluminum, copper or the like.

In addition, the heatsink device 12 further includes a first heatsink material 15 coated between the surface 100 of the housing 10 and the bottom face 121b of the heatsink plate 121, and a second heatsink material 14 coated between the top face 121a of the heatsink plate 121 and the bottom face 120b of the heat conductive plate 120.

Preferably, each of the first heatsink material 15 and the second heatsink material 14 is a heatsink paste.

In practice, the heatsink device 12 is mounted between the housing 10 and the circuit board 11, so that the heat produced by the heat sources 113 of the circuit board 11 during operation is transmitted from the heat conductive plate 120 to the heatsink plate 121 largely and rapidly and is then carried away from the housing 10. Thus, the heatsink device 12 dissipates the heat produced by the heat sources 113 of the circuit board 11 largely and rapidly so as to reduce the temperature of the heat sources 113 of the circuit board 11 largely and rapidly, thereby enhancing the heat dissipation effect of the electronic apparatus.

The temperatures of the heat sources of the circuit board of the electronic apparatus are shown in and compared by table 1 and table 2, wherein table 1 shows the electronic apparatus without the heatsink device and table 2 shows the electronic apparatus with the heatsink device.

Table 1:

IDLE FULL RUN

Measured at Measured at Measured at Measured at Heat source room temperature 35 C room temperature 35 C CPU 5 1.9 C 57.9 C 63.7 C 70 C North bridge 56.9 C 59.8 C 70.9 C 77.1 C South bridge 67.4 C 69.1 C 79.1 C 81.8 C Space in the 39.9 C 44.4 C 53.5 C 55.8 C housing

Table 2:

IDLE FULL RUN

Measured at Measured at Measured at Measured at Heat source room temperature 35 C room temperature 35 C CPU 5 1.9 C 57.8 C 57.2 C 63.9 C North bridge 51.6 C 54.2 C 56 C 59.8 C South bridge 6 1.9 C 59.1 C 6 1. 9 C 6 1.6 C Space in the 29.4 C 36.2 C 31.6 C 36.8 C housing In conclusion, the temperatures of the heat sources 113 (including the CPU, the north bridge and the south bridge) of the circuit board 11 are reduced largely, thereby enhancing the heat dissipation effect of the electronic apparatus. In addition, the temperature in the space of the housing 10 is also reduced largely.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims

1. A heat dissipation method for an electronic apparatus comprising a housing, and a circuit board mounted in the housing, the heat dissipation method comprising the steps of: step 1: providing a heatsink plate having a bottom face rested on a surface of the housing; and step 2: providing a heat conductive plate having a bottom face rested on a top face of the heatsink plate and a top face rested on a bottom face of the circuit board.

2. The heat dissipation method in accordance with claim l, wherein the heat conductive plate is made of a heat conductive rubber.

3. The heat dissipation method in accordance with claim l, wherein the heat conductive plate is made of a heat conductive soft pad.

4. The electronic apparatus in accordance with claim 3, wherein the heat conduct) ve electrically insulating pad is made of heat conductive rubber material. lo

4. The heat dissipation method in accordance with claim 1, wherein each of the housing and the heatsink plate is made of silver.

5. The heat dissipation method in accordance with claim l, wherein each of the housing and the heatsink plate is made of aluminum.

6. The heat dissipation method in accordance with claim 1, wherein each of the housing and the heatsink plate is made of copper.

7. The heat dissipation method in accordance with claim 1, further comprising the step of providing a heatsink material coated between the surface of the housing and the bottom face of the heatsink plate.

8. The heat dissipation method in accordance with claim 7, wherein the heatsink material is a heatsink paste.

9. The heat dissipation method in accordance with claim 1, further comprising the step of providing a heatsink material coated between the top face of the heatsink plate and the bottom face of the heat conductive plate.

10. The heat dissipation method in accordance with claim 9, wherein the heatsink material is a heatsink paste.

An electronic apparatus comprising: a housing; a circuit board mounted in the housing; and a heatsink device mounted between and rested on the housing and the circuit board.

12. The electronic apparatus in accordance with claim 11, wherein the heatsink device includes a heatsink plate having a bottom face rested on a surface of the housing, and a heat conductive plate having a bottom face rested on a top face of the heatsink plate and a top face rested on a bottom face of the circuit board.

13. The electronic apparatus in accordance with claim 12, wherein the heatsink device further includes a heatsink material coated between the surface of the housing and the bottom face of the heatsink plate.

14. The electronic apparatus in accordance with claim 13, wherein the heatsink material is a heatsink paste.

The electronic apparatus in accordance with claim 12, wherein the heatsink device further includes a heatsink material coated between the top face of the heatsink plate and the bottom face of the heat conductive plate.

l 6. The electronic apparatus in accordance with claim 15, wherein the heatsink material is a heatsink paste.

17. The electronic apparatus in accordance with claim 12, wherein the heat conductive plate is made of a heat conductive rubber or soft pad.

18. The electronic apparatus in accordance with claim 12, wherein each of the housing and the heatsink plate is made of silver.

19. The electronic apparatus in accordance with claim 12, wherein each of the housing and the heatsink plate is made of aluminum.

20. The electronic apparatus in accordance with claim 12, wherein each of the housing and the heatsink plate is made of copper.

Amendments to the claims have been filed as follows

1. A heat dissipation method for an electronic apparatus comprising a housing, and a circuit board mounted in the housing, the heat dissipation method comprising the steps of: step 1: providing a first heat conductive paste coated on a surface of the housing; step 2: providing a heat conductive metallic plate having a bottom face rested on the first heat conductive paste; step 3: providing a second heat conductive paste coated on a top face lo of the heat conductive metallic plate; step 4: providing a heat conductive electrically insulating pad having a bottom face rested on the second heat conductive paste and a top face rested on a bottom face of the circuit board.

2. The heat dissipation method in accordance with claim l, wherein the heat conductive electrically insulating pad is made of heat conductive rubber material.

3. An electronic apparatus comprising: a housing; a first heat conductive paste coated on a surface of the housing; a heat conductive metallic plate having a bottom face rested on the first heat conductive paste; a second heat conductive paste coated on a top face of the heat conductive metallic plate; a heat conductive electrically insulating pad having a bottom face rested on the second heat conductive paste; and 5a circuit board mounted on a top face of the heat conductive electrically insulating pad.