Patent ID: 6336497
Filing Date: 2002-01-08
Classification: F28D,H01L

Abstract:
A heat dissipating means for cooling central processing unit comprising:a barrel having a first end portion contiguous to and secured with a central processing unit (CPU), and having a second end portion of said barrel, opposite to said first end portion, contiguous to and secured with a cooling fan; a plurality of fins integrally and circumferentially formed on said barrel; a buckle means secured with the first end portion of said barrel for fastening a base board of said central processing unit; and a vaporizable coolant filled and accumulated in a lower portion of said barrel which is evacuated to form vacuum before being filled with said vaporizable coolant; whereby upon absorption of heat, which is produced from said central processing unit and thermally conducted to said barrel, by said vaporizable coolant, said coolant at a liquid state is vaporized after absorbing a heat of vaporization to become vapor to be contacted with a barrel wall which is cooled by cooling air as directed and driven by said cooling fan to said barrel wall and said fins; and upon condensation of said vapor of said coolant to be liquid coolant to liberate heat of condensation which is dissipated outwardly through the barrel wall and the fins, said liquid coolant will be gravitationally drained to the lower portion in said barrel for a self-recirculation of two phase change of said coolant to efficiently absorb and dissipate heat from said central processing unit; said barrel integrally formed with a transfer means including a portion of said transfer means contiguous to said buckle means and connected to said central processing unit to conduct heat from said CPU through said transfer means to said barrel for vaporizing said vaporizable coolant in said barrel.