Abstract:
A heat exhaustion structure for a heat dissipating device is provided. The present invention relates to a heat exhaustion structure for a heat dissipating device, and more particularly, to a heat exhaustion structure that may effectively exhaust an internal heat generated by heat dissipating devices included in a semiconductor package and in a large number of electronic products.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of Korean Patent Application No. 10-2010-0013297 and of Korean Patent Application No. 10-2010-0088728, respectively filed on Feb. 12, 2010 and Sep. 10, 2010, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference. 
     BACKGROUND 
     1. Field of the Invention 
     The present invention relates to a heat exhaustion structure for a heat dissipating device, and more particularly, to a heat exhaustion structure that may effectively exhaust an internal heat generated by heat dissipating devices included in a semiconductor package and in a large number of electronic products. 
     2. Description of the Related Art 
     Generally, a heat generated in an electronic device is exhausted to the outside, by using forced or natural convection and using conduction. In particular, in an example in which a inlet port and an exhaust port are included in an electronic device, a scheme of drawing in an external air through the inlet port, cooling an internally generated heat using the drawn-in external air, and exhausting the heat to the outside through the exhaust port may be effective for heat exhaustion. 
     The scheme may be applied to an electronic device, such as a personal computer (PC), of which the environment and the side of the PC need not to be separated completely. However, it is difficult to apply the scheme to an electronic device, such as a high-frequency high-power amplifier, of which the environment and the side of the PC need to be separated completely. 
     Accordingly, in the latter case, it is desirable to transfer an internally generated heat to the outside through internal conduction via a case, and then through forced or natural convection using an air flow passing through an outer wall of the case. 
       FIG. 1  is a diagram illustrating a conventional heat exhaustion structure. 
     Referring to  FIG. 1 , a portion of a heat generated by a heat dissipating device  100  may be conducted by a substrate  101  where the heat dissipating device  100  is installed. The conducted heat may be transferred to a heat sink  103  through a case  102 , and may be exhausted to the outside. Another portion of the heat may be transferred to the case  102  through radiation, and then be conducted to the heat sink  103 . 
     Here, when a plurality of substrates  101  are piled up as shown in  FIG. 1 , a heat generated by a heat dissipating device  100  on a substrate  101  may be transferred to an upper substrate  101  through radiation. 
     For example, when a heat dissipating device for generating a great amount of heat is installed on a lower substrate, a temperature of an upper substrate may be further increased compared to other substrates. Additionally, since the substrates  101  have low thermal conductivity due to their characteristics, a scheme of further improving a heat exhaustion scheme through the radiation may be efficient in view of system heat management. 
       FIG. 2  is a diagram illustrating another conventional heat exhaustion structure. 
     Referring to  FIG. 2 , a block A made of metal materials with high thermal conductivity is disposed between a heat dissipating device  110  and a case  111 , and accordingly an efficiency of heat exhaustion through the conduction may be increased. 
     However, in an example in which a height of the block A is greater than a distance between the heat dissipating device  110  and the case  111 , the heat dissipating device  110  may be damaged due to a pressure applied to the case  111  and the block A. Conversely, in another example in which the height of the block A is less than the distance, both ends of the block A may not be sufficiently in contact with each other, an efficiency of heat transfer through the block A may be reduced. Additionally, in both the examples, processing may be performed so that a manufacturing tolerance may be reduced, however, problems occur that a gap may be formed due to an actual size by an assembling tolerance. 
     SUMMARY 
     An aspect of the present invention provides a heat exhaustion structure for a heat dissipating device that may transfer a heat radiated from the heat dissipating device concentratively to a heat sink or a case using an optical component such as an infrared lens and/or an infrared reflecting mirror. 
     Another aspect of the present invention provides a heat exhaustion structure for a heat dissipating device that may more accurately transfer a heat radiated from the heat dissipating device to a predetermined portion of a heat sink or a predetermined portion of a case, by adjusting an angle of an optical component. 
     According to an aspect of the present invention, there is provided a heat exhaustion structure for a heat dissipating device, including: a substrate where the heat dissipating device is installed; a case to transfer a heat generated by the heat dissipating device to a heat sink or to an outside, the case being installed in a side of the substrate; and an infrared lens to deflect the heat to the heat sink or to the case. 
     According to another aspect of the present invention, there is provided a heat exhaustion structure for a heat dissipating device, including: a substrate where the heat dissipating device is installed; a case to transfer a heat generated by the heat dissipating device to a heat sink or to an outside, the case being installed in a side of the substrate; and an infrared reflecting mirror to reflect the heat to the heat sink or to the case. 
     EFFECT 
     According to embodiments of the present invention, a heat generated by a heat dissipating device may be transferred to a heat sink or a case by concentrating or reflecting the heat, and thus it is possible to effectively exhaust a heat generated within an electronic device. 
     Additionally, according to embodiments of the present invention, when substrates are piled up, it is possible to prevent a heat from being transferred from a lower substrate to an upper substrate or other substrates. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and/or other aspects, features, and advantages of the invention will become apparent and more readily appreciated from the following description of exemplary embodiments, taken in conjunction with the accompanying drawings of which: 
         FIGS. 1 and 2  are diagrams illustrating conventional heat exhaustion structures; 
         FIG. 3  is a diagram illustrating a heat exhaustion structure for a heat dissipating device according to an embodiment of the present invention; 
         FIG. 4  is a diagram illustrating a heat exhaustion structure for a heat dissipating device according to another embodiment of the present invention; and 
         FIG. 5  is a diagram illustrating a heat exhaustion structure for a heat dissipating device according to still another embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Exemplary embodiments are described below to explain the present invention by referring to the figures. 
       FIG. 3  is a diagram illustrating a heat exhaustion structure for a heat dissipating device according to an embodiment of the present invention. 
     Referring to  FIG. 3 , the heat exhaustion structure may include a heat dissipating device  300 , a Printed Circuit Board (substrate)  310 , a case  320 , and an infrared lens  330 . 
     The heat dissipating device  300  may be installed on a side of the substrate  310 , and may be implemented as various types of electronic devices and components, for example, a condenser, a semiconductor device, a sensor, a transistor, an amplifier, a diode, and the like. 
     The substrate  310  where the heat dissipating device  300  is installed may provide a connection of the installed heat dissipating device  300  using a conductive line or a signal line. 
     The case  320  may be installed on the other side of the substrate  310 . When a heat generated by the heat dissipating device  300  is transferred to the case  320 , the case  320  may transfer the heat to a heat sink  340 , or the outside. The case  320  may be made of metal materials or plastic materials, on demand. 
     The infrared lens  330  may be disposed on a route where the heat generated by the heat dissipating device  300  is radiated, and may deflect the heat to the heat sink  340  and to the case  320 . 
     The heat sink  340  may absorb a heat transferred from the infrared lens  340  or from the case  320 , and may dissipate the absorbed heat to the outside. 
     In other words, the heat generated by the heat dissipating device  300  may be deflected by the infrared lens  330  and thus, it is possible to more concentratively transfer the heat to the heat sink  340  and the case  320 . 
     In particular, at least one heat pipe  350  may be installed inside or outside the heat sink  340 . The heat pipe  350  may be used to efficiently transfer a heat, and may be implemented, for example, as a metal pipe using a refrigerant that generally has a high thermal conductive coefficient. 
     As a result, the infrared lens  330  may deflect the heat generated by the heat dissipating device  300 , so that the heat may be concentratively transferred to a predetermined portion of the heat sink  340  where the heat pipe  350  is installed, thereby increasing a heat exhaust effect. 
       FIG. 4  is a diagram illustrating a heat exhaustion structure for a heat dissipating device according to another embodiment of the present invention. 
     In the heat exhaustion structure of  FIG. 4 , an infrared reflecting mirror  430  may be installed, instead of the infrared lens  330  of  FIG. 3 . Additionally, a heat dissipating device  400 , a substrate  410 , a case  420 , a heat sink  440 , and a heat pipe  450  of  FIG. 4  may be respectively identical to the heat dissipating device  300 , the substrate  310 , the case  320 , the heat sink  340 , and the heat pipe  350  of  FIG. 3 . 
     Referring to  FIG. 4 , the infrared reflecting mirror  430  may be disposed on a route where a heat is reflected from the heat dissipating device  400 , and may reflect the heat to the heat sink  440  or the case  420 . 
     When the heat pipe  450  is installed inside and outside the heat sink  440 , the embodiment may be further utilized, since the heat may be more accurately reflected in a direction that the heat pipe  450  is installed by adjusting an installation angle of the infrared reflection mirror  430 . The infrared reflecting mirror  430  may desirably be disposed on the route where the heat is radiated from the heat dissipating device  400 , at an angle where the radiated heat is concentratively reflected to a predetermined portion of the heat sink  440  where the heat pipe  450  is installed. 
       FIG. 5  is a diagram illustrating a heat exhaustion structure for a heat dissipating device according to still another embodiment of the present invention. 
     The heat exhaustion structure of  FIG. 5  may include heat dissipating devices  500  and  501 , substrates  510  and  511 , a case  520 , infrared reflecting mirrors  530  and  531 , an infrared lens  532 , and a heat sink  540  that may be identical to those included in the heat exhaustion structures of  FIGS. 3 and 4 . Additionally, in the heat exhaustion structure of  FIG. 5 , the substrates  510  and  511  are piled up. 
     In the case of the heat dissipating device  500 , the infrared reflecting mirror  530  may be disposed on a route where a heat is radiated from the heat dissipating device  500 . The infrared reflecting mirror  530  may reflect the radiated heat toward the case  520 . 
     Accordingly, the heat generated by the heat dissipating device  500  may be transferred to the heat sink  540  through the case  520 , rather than being radiated to the substrate  511  disposed above the substrate  510  where the heat dissipating device  500  is installed. 
     In the case of the heat dissipating device  501 , the infrared reflecting mirror  531  and the infrared lens  532  may be disposed on a route where a heat is radiated from the heat dissipating device  501 . The infrared reflecting minor  531  may reflect the radiated heat toward the case  520 , and the infrared lens  532  may deflect the heat reflected by the infrared reflecting mirror  531  to the case  520  so that the heat may be concentrated on the case  520 . 
     As a result, the heat radiated from the heat dissipating device  501  may be transferred to the case  520  through the deflecting operation, as well as the reflecting operation, and thus a heat loss may be reduced compared to the heat dissipating device  500 . 
     Although a few exemplary embodiments of the present invention have been shown and described, the present invention is not limited to the described exemplary embodiments. Instead, it would be appreciated by those skilled in the art that changes may be made to these exemplary embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.