Patent Publication Number: US-2007097626-A1

Title: Structure for heat dissipation in a portable computer

Description:
BACKGROUND OF THE INVENTION  
      1) Field of the Invention  
      The present invention is a structure for heat dissipation in a portable computer. Specifically, the present invention utilizes additional heat dissipation space and heat dissipation module, which is composed of heat dissipation devices, to raise the capability of heat dissipation, to solve the problem of insufficient heat dissipation in contemporary notebook computers.  
      2) Description of the Prior Art  
      With the fast development of computer technology, the computing ability of CPU is raised, the problem of heat dissipation caused by chips needs more concern, the technology of heat dissipation accordingly becomes an important issue. For notebook computer, the installation of heat dissipation module is limited by its small space, the problem of insufficient heat dissipation is therefore more serious.  
      The heat dissipation system of a conventional notebook computer is shown in  FIG. 1  and  FIG. 2 . In the containing space  8 , a heat sink  2  is attached on the chip  3  of main board  4 . The heat generated by chip  3  is conducted to the heat sink  2 , then cooled and drained out through outlet  81  by fan  1 .  
      This type of heat dissipation module was installed inside internal space  8  of computer. Since, in the containing space, there exist other devices and electric circuits on the main board  4 , the space provided for heat exchange is limited, the area and effect for heat dissipation is thus constrained.  
      However, with the raising of computing speed, the heat generated by chip operation is significantly increased, the ability of a conventional heat dissipation module in the notebook computer gradually does not meet the requirement of heat dissipation.  
      Based on the problem of insufficient heat dissipation stated above, a structure for heat dissipation in a portable computer according to the present invention is thus introduced. In the present invention, an additional heat dissipation room is provided to increase the space of heat exchange and thus enhance the effect of heat dissipation. Besides, the present invention utilizes heat dissipation module provided in the heat dissipation room to significantly increase the capability of heat dissipation, and in consequence solves the problem of insufficient heat dissipation accompanied by modern notebook computers.  
     SUMMARY OF THE INVENTION  
      The primary purpose of the structure for heat dissipation in a portable computer according the present invention is to provide sufficient space and area for heat dissipation for notebook computer, in order to solve the problem of insufficient heat dissipation that the existing notebook computers cope with.  
      The present invention provides a heat dissipation room inside the case of a usual notebook computer. The heat dissipation room is separated from the internal space of computer by a separator. A heat dissipation module is provided in the heat dissipation room. The heat dissipation module includes a heat conductor, a fan, a heat dissipation plate. The heat dissipation plate includes multiple fins.  
      One end of the heat conductor is connected to the heat sink, while the other end is connected to the heat dissipation plate, such that the heat generated by chip is promptly conducted to the heat dissipation plate and then the exchanged heat is blown out of the case by the fan.  
      With the installation of heat dissipation room and heat dissipation plate, the area of heat dissipation plate as well as the space of heat exchange is considerably increased, the whole capability of heat dissipation is raised, and the problem of insufficient heat dissipation that modem notebook computers is coping with is accordingly solved. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a schematic depiction showing the allocation of heat dissipation module in a conventional notebook computer.  
       FIG. 2  is a top view showing the allocation of heat dissipation module in a conventional notebook computer.  
       FIG. 3  shows the heat dissipation module and structure in accordance with the present invention.  
       FIG. 4  is a top view showing the heat dissipation module and structure in accordance with the present invention.  
       FIG. 5A  is a schematic depiction of heat dissipation plate in accordance with an embodiment of the present invention.  
       FIG. 5B  is a schematic depiction of heat dissipation plate in accordance with another embodiment of the present invention.  
       FIG. 6  shows the heat dissipation module and structure in accordance with another embodiment of the present invention.  
       FIG. 7A  shows the allocation of heat dissipation plate and fan in accordance with an embodiment of the present invention.  
       FIG. 7B  shows the allocation of heat dissipation plate and fan in accordance with another embodiment of the present invention.  
       FIG. 8  shows the heat dissipation module with thermoelectric cooling kit in accordance with an embodiment of the present invention.  
       FIG. 9  shows the heat dissipation module with heat insulator in accordance with an embodiment of the present invention.  
       FIG. 10  shows the heat dissipation module in accordance with another embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      Referring to  FIGS. 3 and 4  are the best embodiments of this invention, which show that structure for heat dissipation in a portable computer according to the present invention installs an additional heat dissipation room  9  in the containing space  8  of a notebook computer, for allocating conductor  51 , heat dissipation plate  50  and fan  1  of heat dissipation module  5 . The heat dissipation module  5  at least includes a heat conductor  51 , a heat dissipation plate  50 , a fan  1 .  
      The heat dissipation room  9  is separated from containing space  8  by a heat insulator  6 . On the heat insulator  6  multiple convex parts  61  and holes  62  are provides. The holes  62  are provided for penetrating heat conductor  51 . The heat conductor  51  conducts heat between heat sink  2  and heat dissipation plate  50 . Multiple convex parts  61  are provided for fixing main board  4  or other devices.  
      There exist(s) one or more than one heat conductor(s)  51  in the heat dissipation module  5 . For each heat conductor  51 , one end is attached on the heat sink  2  which installed on chip  3  of main board  4  (which is installed in the containing space  8 ), while the other end is connected to the heat dissipation plate  50 . When computer works, the heat generated by chip  3  is conducted to heat sink  2 , the heat conductor  51  then conducts heat to the heat dissipation plate  50  (which is installed in the heat dissipation room  9 ). Multiple fins  500  are set on the heat dissipation plate  50  for increasing the dissipation area as well as the effect of heat dissipation.  
      Then, the fan  1  draws cool air from inlet  71 , the cool air is blown to heat dissipation plate  50  and fins  500 , the hot air is drained out of the case through outlet  72 . The whole effect of heat dissipation is thus significantly increased, the problem of insufficient heat dissipation that modem notebook computers is coping with is accordingly solved.  
      Further referring to  FIG. 5A  and  FIG. 5B , where the heat dissipation plate  50  and fins  500  in accordance with an embodiment of the present invention is disclosed. As shown, fins  500  can be set on either dual sides or single side of the heat dissipation plate  50 .  
      Furthermore, referring to  FIG. 6 , which shows the structure for heat dissipation in a portable computer according to another embodiment of the present invention. Remembering that, in  FIG. 3 , the fan  1  draws cool air from inlet  71 , the cool air is blown to heat dissipation plate  50  and fins  500 , the hot air is drained out of the case through outlet  72 . As compared with  FIG. 3 , the present embodiment installs inlet  711  on the top of fan  1 , such that the fan  1  draws external air from the upside inlet  711 . After performing heat exchange with the heat dissipation plate  50  and fins  500 , the heat air is drained out of the case through outlet  72 .  
      Additionally, referring to  FIG. 7A  and  FIG. 7B , which show the allocation of heat dissipation plate and fan in accordance with an embodiment of the present invention. As shown in  FIG. 7A , the fan  1  may be installed at the center of heat dissipation room  9 , the cool air is blown from center to the heat dissipation plate  50  and fins  500  that installed at both sides. The exchanged heat is then drained out through the outlets  72  located at the corners.  
      Also, as shown in  FIG. 7B , fan  1  installed near the inlet  71  at one side of heat dissipation room  9  draws external air, after exchanging heat with the heat dissipation plate  50  and fins  500 , the hot air is drained out through fan  1  installed near the outlet  72  at another side of heat dissipation plate  50 .  
      Moreover, referring to  FIG. 8 , which shows the heat dissipation module in accordance with another embodiment of the present invention. A thermoelectric cooling kit  52  is installed between heat conductor  51  and heat dissipation plate  50 , to accelerate the effect of cooling and expand the contact area for heat dissipation.  
      Still, referring to  FIG. 9 , which shows the heat dissipation room in accordance with another embodiment of the present invention. In the heat dissipation room  9 , an additional heat insulator  53  is installed at the bottom of heat dissipation plate  50 . The said heat insulator  53  is made of material that doest not conduct heat, such that the heat of heat dissipation plate  50  in heat dissipation room  9  is not conducted to the bottom of computer case. Consequently, the user won&#39;t be burned by putting the portable computer on the laptop.  
      What&#39;s more, referring to  FIG. 10 , which reversely installs the chip  3  of main board  4  in the containing space  8 . The other end of heat conductor  51  contacts the heat dissipation plate  50  such that, during operation, the heat generated by chip  3  is directly conducted to the heat conductor  51 , and then conducted to the heat dissipation plate  50  in the heat dissipation room  9 . With the help of fins  500 , the area as well as the effect for heat dissipation is increased. In this embodiment, the heat conductor  51  may be embodied by a heat pipe or a thermoelectric cooling kit  52 .