Heat radiation apparatus, phase-change cooling apparatus including the same, and method for radiating heat

Abstract

It is impossible, in a phase-change cooling apparatus in which a refrigerant flows in a gas-liquid two-phase state, to enhance cooling capacity sufficiently even though a heat-radiating region is enlarged; therefore, a heat radiation apparatus according to an exemplary aspect of the present invention includes gas-phase refrigerant diffusion means into which a refrigerant in a gas-liquid two-phase state flowing, the gas-phase refrigerant diffusion means being filled with a gas-phase refrigerant included in the refrigerant in the gas-liquid two-phase state; heat-radiating means including a first header, a second header, and a plurality of heat-radiating pipes connecting the first header to the second header, the gas-phase refrigerant flowing through the plurality of heat-radiating pipes; and gas-phase-side connection means for connecting the gas-phase refrigerant diffusion means to the first header, the gas-phase refrigerant flowing in the gas-phase-side connection means.

What is claimed is: 
     
         1 . A heat radiation apparatus, comprising:
 a gas-phase refrigerant diffusion section into which a refrigerant in a gas-liquid two-phase state flows, the gas-phase refrigerant diffusion section being filled with a gas-phase refrigerant included in the refrigerant in the gas-liquid two-phase state;   a heat-radiating section including a first header, a second header, and a plurality of heat-radiating pipes connecting the first header to the second header, the gas-phase refrigerant flowing through the plurality of heat-radiating pipes; and   a gas-phase-side connection section configured to connect the gas-phase refrigerant diffusion section to the first header, the gas-phase refrigerant flowing in the gas-phase-side connection section.   
     
     
         2 . The heat radiation apparatus according to  claim 1 , wherein
 the gas-phase-side connection section connects the gas-phase refrigerant diffusion section to a central region in a longitudinal direction of the first header.   
     
     
         3 . The heat radiation apparatus according to  claim 1 , wherein
 a first end of the heat-radiating pipe extends into the first header,   the gas-phase-side connection section includes a first pipe structure, and   an extension of a central axis of the first pipe structure is located above the first end.   
     
     
         4 . The heat radiation apparatus according to  claim 1 , wherein
 the gas-phase-side connection section includes a first pipe structure, and   a central axis of the heat-radiating pipe and a central axis of the first pipe structure have non-parallel relationship on a same plane.   
     
     
         5 . The heat radiation apparatus according to  claim 1 , wherein
 the heat-radiating section includes a plurality of heat radiators,   each of the plurality of heat radiators includes a third header constituting the first header, a fourth header constituting the second header, and the plurality of heat-radiating pipes connecting the third header to the fourth header, and the gas-phase refrigerant flows through the plurality of heat-radiating pipes,   the gas-phase-side connection section includes a plurality of gas-phase-side connection structures each of which connects the gas-phase refrigerant diffusion section to the third header, which the gas-phase refrigerant flows through, and   each of the plurality of the gas-phase-side connection structures connects the gas-phase refrigerant diffusion section to a central region in a longitudinal direction of the third header.   
     
     
         6 . The heat radiation apparatus according to  claim 1 , further comprising
 a liquid-phase refrigerant transport section configured to store and transport a liquid-phase refrigerant having passed through the heat-radiating pipe, and   a liquid-phase-side connection section configured to connect the liquid-phase refrigerant transport section to the second header, the liquid-phase refrigerant flowing in the liquid-phase-side connection section.   
     
     
         7 . The heat radiation apparatus according to  claim 6 , wherein
 a second end of the heat-radiating pipe extends into the second header,   the liquid-phase-side connection section includes a second pipe structure, and   an extension of a central axis of the second pipe structure is located below the second end.   
     
     
         8 . A phase-change cooling apparatus, comprising:
 a heat radiation apparatus,
 the heat radiation apparatus, including 
 a gas-phase refrigerant diffusion section into which a refrigerant in a gas-liquid two-phase state flows, the gas-phase refrigerant diffusion section being filled with a gas-phase refrigerant included in the refrigerant in the gas-liquid two-phase state, 
 a heat-radiating section including a first header, a second header, and a plurality of heat-radiating pipes connecting the first header to the second header, the gas-phase refrigerant flowing through the plurality of heat-radiating pipes, 
 a gas-phase-side connection section configured to connect the gas-phase refrigerant diffusion section to the first header, the gas-phase refrigerant flowing in the gas-phase-side connection section, 
 a liquid-phase refrigerant transport section configured to store and transport a liquid-phase refrigerant having passed through the heat-radiating pipe, and 
 a liquid-phase-side connection section configured to connect the liquid-phase refrigerant transport section to the second header, the liquid-phase refrigerant flowing in the liquid-phase-side connection section; 
   a heat receiving section configured to generate the refrigerant in the gas-liquid two-phase state by receiving heat;   a first connection section configured to connect the heat receiving section to the gas-phase refrigerant diffusion section; and   a second connection section configured to connect the heat receiving section to the liquid-phase refrigerant transport section.   
     
     
         9 . A method for radiating heat, comprising:
 receiving a refrigerant in a gas-liquid two-phase state, and generating a diffused gas-phase refrigerant by uniformly diffusing a gas-phase refrigerant included in the refrigerant in the gas-liquid two-phase state;   generating a plurality of gas-phase refrigerant flows by making the diffused gas-phase refrigerant branch; and   condensing and liquefying each of the plurality of gas-phase refrigerant flows.   
     
     
         10 . The method for radiating heat according to  claim 9 , wherein
 the diffused gas-phase refrigerant is made to branch so that a flow distribution of the plurality of gas-phase refrigerant flows may become symmetric.   
     
     
         11 . The heat radiation apparatus according to  claim 2 , wherein
 a first end of the heat-radiating pipe extends into the first header,   the gas-phase-side connection section includes a first pipe structure, and   an extension of a central axis of the first pipe structure is located above the first end.   
     
     
         12 . The heat radiation apparatus according to  claim 2 , wherein
 the gas-phase-side connection section includes a first pipe structure, and   a central axis of the heat-radiating pipe and a central axis of the first pipe structure have non-parallel relationship on a same plane.   
     
     
         13 . The heat radiation apparatus according to  claim 3 , wherein
 the gas-phase-side connection section includes a first pipe structure, and   a central axis of the heat-radiating pipe and a central axis of the first pipe structure have non-parallel relationship on a same plane.   
     
     
         14 . The heat radiation apparatus according to  claim 2 , wherein
 the heat-radiating section includes a plurality of heat radiators,   each of the plurality of heat radiators includes a third header constituting the first header, a fourth header constituting the second header, and the plurality of heat-radiating pipes connecting the third header to the fourth header, and the gas-phase refrigerant flows through the plurality of heat-radiating pipes,   the gas-phase-side connection section includes a plurality of gas-phase-side connection structures each of which connects the gas-phase refrigerant diffusion section to the third header, which the gas-phase refrigerant flows through, and   each of the plurality of the gas-phase-side connection structures connects the gas-phase refrigerant diffusion section to a central region in a longitudinal direction of the third header.   
     
     
         15 . The heat radiation apparatus according to  claim 3 , wherein
 the heat-radiating section includes a plurality of heat radiators,   each of the plurality of heat radiators includes a third header constituting the first header, a fourth header constituting the second header, and the plurality of heat-radiating pipes connecting the third header to the fourth header, and the gas-phase refrigerant flows through the plurality of heat-radiating pipes,   the gas-phase-side connection section includes a plurality of gas-phase-side connection structures each of which connects the gas-phase refrigerant diffusion section to the third header, which the gas-phase refrigerant flows through, and   each of the plurality of the gas-phase-side connection structures connects the gas-phase refrigerant diffusion section to a central region in a longitudinal direction of the third header.   
     
     
         16 . The heat radiation apparatus according to  claim 4 , wherein
 the heat-radiating section includes a plurality of heat radiators,   each of the plurality of heat radiators includes a third header constituting the first header, a fourth header constituting the second header, and the plurality of heat-radiating pipes connecting the third header to the fourth header, and the gas-phase refrigerant flows through the plurality of heat-radiating pipes,   the gas-phase-side connection section includes a plurality of gas-phase-side connection structures each of which connects the gas-phase refrigerant diffusion section to the third header, which the gas-phase refrigerant flows through, and   each of the plurality of the gas-phase-side connection structures connects the gas-phase refrigerant diffusion section to a central region in a longitudinal direction of the third header.   
     
     
         17 . The heat radiation apparatus according to  claim 2 , further comprising
 a liquid-phase refrigerant transport section configured to store and transport a liquid-phase refrigerant having passed through the heat-radiating pipe, and   a liquid-phase-side connection section configured to connect the liquid-phase refrigerant transport section to the second header, the liquid-phase refrigerant flowing in the liquid-phase-side connection section.   
     
     
         18 . The heat radiation apparatus according to  claim 3 , further comprising
 a liquid-phase refrigerant transport section configured to store and transport a liquid-phase refrigerant having passed through the heat-radiating pipe, and   a liquid-phase-side connection section configured to connect the liquid-phase refrigerant transport section to the second header, the liquid-phase refrigerant flowing in the liquid-phase-side connection section.   
     
     
         19 . The heat radiation apparatus according to  claim 4 , further comprising
 a liquid-phase refrigerant transport section configured to store and transport a liquid-phase refrigerant having passed through the heat-radiating pipe, and   a liquid-phase-side connection section configured to connect the liquid-phase refrigerant transport section to the second header, the liquid-phase refrigerant flowing in the liquid-phase-side connection section.   
     
     
         20 . The heat radiation apparatus according to  claim 5 , further comprising
 a liquid-phase refrigerant transport section configured to store and transport a liquid-phase refrigerant having passed through the heat-radiating pipe, and   a liquid-phase-side connection section configured to connect the liquid-phase refrigerant transport section to the second header, the liquid-phase refrigerant flowing in the liquid-phase-side connection section.