Cooling module, and cooling fan device having the same

Abstract

A cooling fan device includes a main housing having first and second accommodating spaces as well as first and second vent holes, a tubular heat-insulating case body receiving a core unit and a conducting unit of a cooling module and disposed in the first accommodating space, and a fan unit disposed in the second accommodating space and driven by a driving motor to rotate such that air entering into the first accommodating space via the first vent hole flows into the case body through a first opening, is cooled by the cooling module, and then flows out of the case body via a second opening and into the second accommodating space, thereby blowing cooled air in the second accommodating space out of the main housing via the second vent hole.

1 . A cooling module comprising:
 a core unit including a heat-conductive first container, and a heat exchanging coolant contained in said first container; and   a conducting unit including a heat-conductive second container for containing said core unit therein, and a heat-conductive medium filled between said first and second containers and having a freezing point higher than that of said heat exchanging coolant.   
   
   
       2 . The cooling module as claimed in  claim 1 , wherein said heat exchanging coolant includes liquid nitrogen. 
   
   
       3 . The cooling module as claimed in  claim 2 , wherein the freezing point of said heat-conductive medium is within a temperature range from −20° C. to 0° C. 
   
   
       4 . The cooling module as claimed in  claim 1 , wherein said first container includes a cylindrical housing having an open end, a cover unit for covering said open end of said housing, and a plurality of fasteners for retaining said cover unit on said housing. 
   
   
       5 . The cooling module as claimed in  claim 4 , wherein said cover unit includes:
 a first cover body disposed fixedly on said open end of said housing by said fasteners and formed with a central opening;   a second cover body received fittingly and movably in said housing, and having a size larger than that of said central opening in said first cover body; and   a biasing member disposed in said housing for biasing said second cover body to abut against said first cover body, thereby closing said central opening in said first cover body.   
   
   
       6 . A cooling fan device comprising:
 a main housing configured with first and second accommodating spaces, and formed with first and second vent holes that are respectively in spatial communication with said first and second accommodating spaces, said second accommodating space being disposed above said first accommodating space;   a heat-insulating casing including a tubular case body that is disposed in said first accommodating space in said main housing and that is formed with a first opening disposed adjacent to said first vent hole, and a second opening opposite to said first opening in a vertical direction and in spatial communication with said second accommodating space in said main housing;   a cooling module disposed in said case body of said heat-insulating casing;   a driving motor disposed in said main housing and having a motor shaft extending downwardly into said second accommodating space; and   a fan unit disposed in said second accommodating space in said main housing and connected fixedly to said motor shaft of said driving motor such that said fan unit is co-rotatable with said motor shaft of said driving motor;   wherein, when said fan unit is driven by said driving motor to rotate about an axis of said motor shaft, air entering into said first accommodating space in said main housing via said first vent hole flows into said case body of said heat-insulating casing through said first opening, is cooled by said cooling module, and then flows out of said case body of said heat-insulating casing via said second opening and into said second accommodating space so that cooled air in said second accommodating space is blown out of said main housing via said second vent hole.   
   
   
       7 . The cooling fan device as claimed in  claim 6 , further comprising an air guiding module that includes
 a cylindrical heat-conductive container disposed in said case body of said heat-insulating casing for containing said cooling module therein; and   a spiral fin extending from an annular outer surface of said heat-conductive container and in contact with an annular inner surface of said case body of said heat-insulating casing such that said spiral fin cooperates with said annular inner surface of said case body of said heat-insulating casing and said annular outer surface of said heat-conductive container so as to define a spiral air-guiding passage thereamong, said air-guiding passage having opposite ends in spatial communication with said first and second openings in said case body of said heat-insulating casing, respectively, the air flowing into said case body of said heat-insulating casing via said first opening being cooled by passing through said air-guiding passage.   
   
   
       8 . The cooling fan device as claimed in  claim 7 , wherein:
 said case body of said heat-insulating casing further has an annular flange extending radially and inwardly from a lower end thereof and defining said first opening; and   said heat-insulating casing further includes
 a bottom cover disposed in said case body and movable in the vertical direction between said annular flange and said heat-conductive container, and having a diameter larger than that of said first opening in said case body, and 
 a top cover disposed in said second accommodating space in said main housing and movable in the vertical direction between said second opening in said case body and said fan unit, and having a diameter greater than that of said second opening in said case body; 
   wherein, when said fan unit rotates about said axis of said motor shaft of said driving motor as a result of activation of said driving motor, said bottom and top covers are pushed upwardly by the air flowing through said first and second openings in said case body of said heat-insulating casing, thereby forming a looped first gap between said bottom cover and said annular flange for permitting air to flow into said heat-insulating casing therethrough, and a looped second gap between said top cover and an upper end of said case body of said heat-insulating casing for permitting air to flow out of said heat-insulating casing therethrough; and   wherein, when said fan unit stops to rotate as a result of deactivation of said driving motor, said bottom and top covers cover respectively said first and second openings in said case body by virtue of gravity.   
   
   
       9 . The cooling fan device as claimed in  claim 6 , further comprising a liquid-collecting member disposed in said main housing and under said heat-insulating casing for collecting liquid generated from condensation of water molecules in said heat-insulating casing.