Electronic apparatus

Abstract

A liquid cooling system for use in an electronic apparatus having a heat generating member includes a heat-receiving member thermally connected with the heat generating member and having a first flow passage, a heat-dissipating member to dissipate heat into an outside air atmosphere, and having a second flow passage, a tube for connecting between the first flow passage and the second flow passage, and a heat transfer device including therein a liquid circulator for circulating liquid through the first and second flow passages between the heat-receiving element and the heat-dissipating element. The liquid circulator produces a liquid circulating flow rate so that a difference between a maximum temperature and a minimum temperature of the circulating liquid at least in the first and second flow passages is not greater than a difference between an upper limit temperature of the heat generating member and an outside air temperature of the electronic apparatus.

What is claimed is:  
     
         1 . An electronic apparatus comprising: 
 a main body having a housing mounting parts including a plural number of electronic parts therein;    a display device having a housing;    a keyboard;    a heat-receiving member, being thermally connected with a semiconductor element as a heat generating member among said electronic parts, and having a first flow passage in which a liquid flows through;    a heat-dissipating member, being disposed on a wall of at least one of said housings of said main body and said display device, so as to dissipate heat therefrom into an outside air atmosphere, and having a second flow passage in which the liquid flows through;    a tube for connecting said first flow passage of said heat-receiving element and said second flow passage of said heat-dissipating element; and    a heat transfer device including therein a liquid circulator for circulating said liquid through said first and second flow passages between said heat-receiving element and said heat-dissipating element, wherein said liquid circulator produces a liquid circulating flow rate so that a difference between a maximum temperature and a minimum temperature of said circulating liquid at least in said first and second flow passages is not greater than a difference between an upper limit temperature of said heat generating member and an outside air temperature of the electronic apparatus.    
     
     
         2 . An electron apparatus according to  claim 1 , wherein the liquid circulating flow rate provided by said liquid circulator is at least 120 μL/sec.  
     
     
         3 . An electronic apparatus according to  claim 2 , wherein the liquid circulating flow rate provided said liquid circulator is not more than 1,200 μL/sec.  
     
     
         4 . An electronic apparatus according to  claim 1 , wherein said display is pivotally supported on said main body and a portion of said tube is made of a flexible tube.  
     
     
         5 . An electronic apparatus according to  claim 1 , wherein said liquid circulator has a thickness less than a height of said main body.  
     
     
         6 . A liquid cooling system for use in an electronic apparatus having a heat generating member, comprising: 
 a heat-receiving member being thermally connected with said heat generating member and having a first flow passage in which a liquid flows through;    a heat-dissipating member, being disposed on a wall of the electronic apparatus so as to dissipate heat into an outside air atmosphere, and having a second flow passage in which the liquid flows through;    a tube for connecting between said first flow passage of said heat-receiving element and said second flow passage of said heat-dissipating element; and    a heat transfer device including therein a liquid circulator for circulating said liquid through said first and second flow passages between said heat-receiving element and said heat-dissipating element, wherein said liquid circulator produces a liquid circulating flow rate so that a difference between a maximum temperature and a minimum temperature of said circulating liquid at least in said first and second flow passages is not greater than a difference between an upper limit temperature of said heat generating member and an outside air temperature of the electronic apparatus.    
     
     
         7 . A liquid cooling system according to  claim 6 , wherein the liquid circulating flow rate provided by said liquid circulator is at least 120 μL/sec.  
     
     
         8 . An electronic apparatus according to  claim 7 , wherein the liquid circulating flow rate provided said liquid circulator is not more than 1,200 μL/sec.  
     
     
         9 . An electronic apparatus comprising: 
 a main body having a housing mounting parts including a plural number of electronic parts therein;    a display device having a housing;    a keyboard;    a heat-receiving member, being thermally connected with a semiconductor element as a heat generating member among said electronic parts, and having a first flow passage in which a liquid flows through;    a heat-dissipating member, being disposed on a wall of at least one of said housings of said main body and said display device, so as to dissipate heat therefrom into an outside air atmosphere, and having a second flow passage in which the liquid flows through;    a tube for connecting said first flow passage of said heat-receiving element and said second flow passage of said heat-dissipating element; and    a heat transfer device including therein a liquid circulator for circulating said liquid through said first and second flow passages between said heat-receiving element and said heat-dissipating element, wherein said liquid circulator produces a liquid circulating flow rate so that at least 10% of a sum of a temperature difference between said semiconductor element and said heat receiving element and a temperature difference between said heat-dissipating element and an outside air temperature of said electronic apparatus is obtained.    
     
     
         10 . An electronic apparatus according to  claim 9 , wherein the liquid circulating flow rate provided by said liquid circulator is at least 120 μL/sec.  
     
     
         11 . An electronic apparatus according to  claim 10 , wherein the liquid circulating flow rate provided said liquid circulator is not more than 1,200 μL/sec.  
     
     
         12 . An electronic apparatus according to  claim 9 , wherein said display is pivotally supported on said main body and a portion of said tube is made of a flexible tube.  
     
     
         13 . An electronic apparatus according to  claim 9 , wherein said liquid circulator has a thickness less than a height of said main body.  
     
     
         14 . A liquid cooling system for use in an electronic apparatus having a heat generating, comprising: 
 a heat-receiving member being thermally connected with said heat generating member and having a first flow passage in which a liquid flows through;    a heat-dissipating member, being disposed on a wall of the electronic apparatus so as to dissipate heat into an outside air atmosphere, and having a second flow passage in which the liquid flows through;    a tube for connecting between said first flow passage of said heat-receiving element and said second flow passage of said heat-dissipating element; and    a heat transfer device including therein a liquid circulator for circulating said liquid through said first and second flow passages between said heat-receiving element and said heat-dissipating element, wherein said liquid circulator produces a liquid circulating flow rate so that at least 10% of a sum of a temperature difference between said heat generating element and said heat receiving element and a temperature difference between said heat-dissipating element and an outside air temperature of the electronic apparatus is obtained.    
     
     
         15 . A liquid cooling system according to  claim 14 , wherein the liquid circulating flow rate provided by said liquid circulator is at least 120 μL/sec.  
     
     
         16 . An electronic apparatus according to  claim 15 , wherein the liquid circulating flow rate provided said liquid circulator is not more than 1,200 μL/sec.  
     
     
         17 . An electronic apparatus comprising: 
 a main body having a housing mounting parts including a plural number of electronic parts therein;    a display device having a housing;    a keyboard;    a heat-receiving member, being thermally connected with a semiconductor element as a heat generating member among said electronic parts, and having a first flow passage in which a liquid flows through;    a heat-dissipating member, being disposed on a wall of at least one of said housings of said main body and said display device, so as to dissipate heat therefrom into an outside air atmosphere, and having a second flow passage in which the liquid flows through;    a tube for connecting said first flow passage of said heat-receiving element and said second flow passage of said heat-dissipating element; and    a heat transfer device including therein a liquid circulator for circulating said liquid through said first and second flow passages between said heat-receiving element and said heat-dissipating element, wherein said liquid circulator produces a liquid circulating flow rate so that a difference between a temperature of said liquid flowing from said heat-dissipating element and a temperature of said liquid flowing from said heat-receiving element in the liquid circulating in at least said first and second flow passages is not greater than a difference between a temperature of said heat generating member and an outside air temperature of the electronic apparatus.    
     
     
         18 . An electron apparatus according to  claim 17 , wherein the liquid circulating flow rate provided by said liquid circulator is at least 120 μL/sec.  
     
     
         19 . An electronic apparatus according to  claim 18 , wherein the liquid circulating flow rate provided said liquid circulator is not more than 1,200 μL/sec.  
     
     
         20 . An electronic apparatus according to  claim 17 , wherein said display is pivotally supported on said main body and a portion of said tube is made of a flexible tube.  
     
     
         21 . An electronic apparatus according to  claim 17 , wherein said liquid circulator has a thickness less than a height of said main body.  
     
     
         22 . A liquid cooling system for use in an electronic apparatus having a heat generating member, comprising: 
 a heat-receiving member being thermally connected with said heat generating member and having a first flow passage in which a liquid flows through;    a heat-dissipating member, being disposed on a wall of the electronic apparatus so as to dissipate heat into an outside air atmosphere, and having a second flow passage in which the liquid flows through;    a tube for connecting between said first flow passage of said heat-receiving element and said second flow passage of said heat-dissipating element; and    a heat transfer device including therein a liquid circulator for circulating said liquid through said first and second flow passages between said heat-receiving element and said heat-dissipating element, wherein said liquid circulator produces a liquid circulating flow rate so that a difference between a temperature of said liquid flowing from said heat-dissipating element and a temperature of said liquid flowing from said heat-receiving element in the liquid circulation in at least in said first and second flow passages is not greater than a difference between a temperature of said heat generating member and an outside air temperature of the electronic apparatus.    
     
     
         23 . A liquid cooling system according to  claim 22 , wherein the liquid circulating flow rate provided by said liquid circulator is at least 120 μL/sec.  
     
     
         24 . An electronic apparatus according to  claim 23 , wherein the liquid circulating flow rate provided said liquid circulator is not more than 1,200 μL/sec.