Abstract:
A series-connected heat dissipater coupled by heat-pipe used for the interface cards of a computer system. Wherein, a plurality of additional auxiliary dissipaters are provided onto the insertion slots adjacent to the interface cards, and are connected to the main dissipater through heat pipe, hereby effectively solving the heat dissipation problem of the interface cards, so that the main-machine-board will not be bent and deformed due to the overweight caused by the interface cards.

Description:
BACKGROUND 
   1. Field of Invention 
   The invention relates a heat dissipater used for the interface card of the computer system, and in particular to a series-connected-heat-pipe type heat dissipater used for the display card. 
   2. Related Art 
   With the rapid progress and development of the computer technology, the operation speed of CPU is ever increasing, thus generating even much more heat. Presently, in addition to CPU, the South Bridge &amp; North Bridge chips on the main-machine-board, and even the graphic chips on the display card, their operation speeds are likewise getting faster, as such requiring the installation of more dissipaters to reduce and keep their temperature within the normal operation range. 
   In general, the chip sets of the above-mentioned computer system can be classified as the chips disposed on the main-machine-board, such as CPU, South Bridge and North Bridge chips, and the chips disposed on the interface card such as the graphic chip on the display card. However, with the operation speed of the electronic components on the chips getting increasingly faster more than the heat dissipater&#39;s capability can catch up to dissipate the heat generated. In comparison, the heat dissipation capability of the heat dissipater is facing increasing challenge. For the CPU, Northbridge, Southbridge chips on the main-machine-board, it is much easier to design and install heat dissipater having more powerful heat dissipating capability, due to existence of large gap between the main-machine-board and the shell. However, for the interface card such as the display card, the gap between the interface cards are rather limited, as such heat is liable to accumulate in the hot air and not easy to dissipate, thus significantly affecting and reducing its heat dissipation effect. In addition, the size of the shell is gradually miniaturized, and recently with the emergence of micro-systems, thus the heat dissipation function and capability of the dissipater for the chips on the main-machine-board are facing increasing challenge. 
   Moreover, since most of the interface cards are inserted into the insertion slots of the main-machine-board, thus in addition to the problem of the narrow spacings between the inserted interface cards, the arrangement of the inserted cards must also be taken into consideration, even if the two adjacent insertion slots can be reserved for the installation of bigger heat dissipater. Yet with the increasing size of the heat dissipater, its weight is increased correspondingly, so that the bottom insertion slot and the side fixing to shell are not strong enough to support the long and thin design of the interface card, thus resulting in the bending and deformation of the main-machine-board supporting the interface card. And in more serious case, this may affect the normal operation of the computer system. 
   In this respect, refer to U.S. Pat. No. 6,532,141, wherein, threaded bolts are used to connect and fix a plurality sets of heat-dissipation fins. Though this may be applied to the ordinary chips (such as, Southbridge and Northbridge chips) on the main-machine-board, however, if it is applied on an interface card such as a display card, that would lead to the bending of the display card due to overweight. 
   SUMMARY OF THE INVENTION 
   The objective of the invention is to provide a series-connected-heat-pipe type heat dissipater that can be used to solve the problem of the insufficient dissipation of the heat generated by the interface card. The bending of the main-machine-board due to the overweight of the interface card can also be avoided. 
   In the embodiment of the series-connected-heat-pipe type heat dissipater, the main dissipater is disposed on the chip of the interface card, and the auxiliary dissipater disposed or secured on the adjacent insertion slots for fixing. The heat pipes are provided to connect the main dissipater and the auxiliary dissipater, hereby the heat of the chip of the interface card received and the collected by the main dissipater is effectively dissipated, thus raising the heat dissipation efficiency. Meanwhile, the auxiliary dissipater is secured to the insertion slot of the adjacent interface card, thus the weight of the interface card will not be additionally increased, as such the main-machine-board will not be bent or deformed due to the overweight caused by the interface card. 
   The device and technology of the invention will be described in detail as follows in conjunction with the attached drawings. 
   Further scope of applicability of the invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention will become more fully understood from the detailed description given hereinbelow for illustration only, and thus are not limitative of the invention, and wherein: 
       FIG. 1  is a schematic diagram for a series-connected-heat-pipe type heat dissipater according to an embodiment of the invention; 
       FIG. 2  is an exploded view of a series-connected-heat-pipe type heat dissipater according to an embodiment of the invention; 
       FIG. 3  a schematic diagram for an auxiliary dissipater of a series-connected-heat-pipe type heat dissipater according to an embodiment of the invention; and 
       FIG. 4  is a schematic diagram of a series-connected-heat-pipe type heat dissipater installed on a main-machine-board according to another embodiment of the invention. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   The purpose, construction, features, and functions of the invention can be appreciated and understood more thoroughly through the following detailed description with reference to the attached drawings. 
   Firstly, refer to  FIG. 1  for a schematic diagram for a series-connected-heat-pipe type heat dissipater according to an embodiment of the invention. As shown in  FIG. 1 , the heat dissipater utilized on a computer system includes a main-machine-body  10  and a housing (not shown). Wherein, a plurality of insertion slots are provided on the main-machine-board  10  for insertion of the interface cards. In the computer system of early days, in addition to the display card which is indispensable, various interface cards are added to provide additional functions such as the audio card, web card, and the SCSI control card depending on the actual requirements. However, for the product of the present stage, most of the functions required are provided by the cards disposed directly on the main-machine-board  10 , such as the audio card, web card, and in many cases even the display card is likewise disposed on the main-machine-board  10 , such that most of the insertion slots are vacant. Usually, the additionally added interface cards are the cards used for providing high level functions, such as the high level graphic card, high level audio card, thus the heat they generate is raised accordingly. Therefore, in most of the computer system, the insertion slots  11  adjacent to the interface card  20  are vacant. As such, in the invention, an auxiliary dissipater  40  is utilized to increase heat dissipation efficiency based on this consideration. Meanwhile, the vacant adjacent insertion slot  11  is arranged, so that the addition of the auxiliary dissipater  40  in combination of the interface card  20  will not cause the problem of overweight. 
   Next, refer to  FIG. 2  for an exploded view of a series-connected-heat-pipe type heat dissipater according to an embodiment of the invention. As shown in  FIG. 2 , in the heat dissipater of the invention, a plurality of insertion slots  11  are provided on the main-machine-board  10 , which are composed of a first insertion slot  111 , a second insertion slot  112 , a third insertion slot  113 , and a fourth insertion slot  114 . An interface card  20  is inserted onto the first insertion slot  11 , with its one end used as a bracket  21  protruding out the main-machine-board  10 , and the top portion of the bracket  21  can be secured to the edge of the shell (not shown). One side of the interface card  20  is provided with the connectors  22  and protruding. The main dissipater  30  is provided on the interface card  20 , and is placed on the chips of the interface card  20 , and a plurality of heat dissipation fins  31  are disposed thereon to dissipate the heat generated by the chips. The auxiliary dissipater  40  is designed as a plate shape similar to that of an interface card  20  and is inserted onto a second insertion slot  112 , namely the insertion slot adjacent to the insertion slot (the first insertion slot  111 ) used for the interface card  20 , and a plurality of heat dissipation fins  41  are provided thereon and are connected through the heat pipes  70 , so that heat can be transferred from the main dissipater  30  to the auxiliary dissipater  40 , thus raising the efficiency of heat dissipation. 
   The heat pipe  70  is of roughly U shape, and its two ends bending downward to form a first connection portion  71  and a second connection portion  72 . Thus, through plugging the first connection portion  71  into the first installation hole  431  of the auxiliary dissipater  40 , and plugging the second connection portion  72  into the installation hole  32  of the main dissipater  30 , the main dissipater  30  is connected to the auxiliary dissipater  40 , thus the heat pipe  70  can be used to transfer heat. Naturally, the shape of the heat pipe  70  is not restricted to U shape, as long as it can be used to connect the main dissipater  30  to the auxiliary dissipater  40 , and its installation is not restricted to the top of the interface card  20 , it may also disposed on one side of the bracket  12 . Moreover, elastic plates, bolts or rotation buttons may be provided inside the first installation hole  431  of the auxiliary dissipater  40  and the installation hole  32  of the main dissipater  30 , so as to fix and secure the first connection portion  71  and the second connection portion  72  of the heat pipe  70 . Naturally, other fixing and securing means may be utilized to achieve the same purpose. 
   The auxiliary dissipater  40  is plugged onto the second insertion slot  112  of the main-machine-board  10 , and it can be secured to the shell (not shown) by making use of the front end design similar to the fixing plate  42  of the bracket  21  of the interface card  20 . Alternatively, it can be realized through the insertion plate  44  provided at the bottom of the auxiliary dissipater  40  and directly inserted onto the second insertion slot  112  as shown in  FIG. 3 . Naturally, both or either of the above-mentioned methods or any other securing means may be utilized 
   Finally, refer to  FIG. 4  for a schematic diagram of a series-connected heat pipe type heat dissipater installed on a main-machine-board according to another embodiment of the invention. As shown in  FIG. 4 , an additional auxiliary dissipater  50  is inserted onto a third insertion slot  113 , and is connected to the auxiliary dissipater  40  through heat pipe  80 . Similarly, refer to  FIG. 2 , the auxiliary dissipaters  40  is provided with the second installation hole  432  for insertion of the heat pipe  80  used for connection. The features of another auxiliary dissipater  50  are similar, thus they will not be repeated here for brevity. Likewise, a plurality of auxiliary dissipaters may be series-connected to increase the heat dissipation efficiency depending on the actual requirements of the interface card. 
   The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.