JPS57202764A - Radiation fin - Google Patents

Abstract

PURPOSE:To obtain a radiation fin having high heat radiating property by a method wherein a cylindrical cavity is dug in the radiation fin to be equipped to a heat generator making the lower end thereof to come in contact with the heat generator, and the upper end thereof to be closed, and a heat conducting element to form the gap part between the inside wall of the fin at the lower side and to come in contact closely with the inside wall of the fin, is inserted in the cavity. CONSTITUTION:The radiation fin 2 is fixed on the heat generator 1, and a coolant is made to flow on the outside wall of the fin 2 as shown with coolant is made to flow on the outside wall of the fin 2 as shown with arrow marks 3 to cool the device 1 forcibly. At this constitution, the cylindrical cavity 7 of which the side to come in contact with the heat generator 1 is made to open, and the upper end is closed inside of the fin 2, is dug in the fin 2. The fin 2 is constituted by this way, and the heat conducting element 6 manufactured with copper and having small diameter at the lower part, generating the gap part 5 between the inside wall of the fin 2, and to come in contact closely with the inside wall of the fin 2 and with the closed face of the cavity 7 at the upper part, is buried in the fin. Accordingly, flow of heat 4a transmitting directly to the element 6 and flow of heat 4b transmitting through the gap part 5 are balanced, and the temperature at the upper part and the temperature at the lower part are equalized.