Cold piece of a cryogenic cooler with improved heat transfer

Abstract

The invention relates to a cold component of a cryogenic cooler, in particular, for cooling electronic components. It is necessary to minimize the thermal resistance between the cooling medium ( 11 ) and the external wall surface on the front face of the cold end of the cold finger ( 3 ), in order to achieve an effective cooling of the electronic component. One possibility is the physical enlargement of the outer wall surface of the front face. The surfaces involved in heat transfer may be effectively increased in size with an almost unchanged volume of the expansion chamber, whereby the inner side of the heat transmitter ( 10 ) and the end of the regenerator ( 5 ) facing the heat transmitter ( 10 ) are ribbed such that the ribs ( 9, 13 ) intermesh with each other in the end position of the regenerator ( 5 ).

1 . Cold component ( 3 ) of a cryogenic cooler ( 1 ) with a piston shaped regenerator ( 5 ) which has openings at each end through which a coolant ( 11 ) can flow, with a closed cylinder in which the regenerator ( 5 ) moves cyclically between a compressor side end position and an expansion side end position, and with a heat transmitter ( 10 ) arranged on a facing side, characterized in that ribs ( 13 ) are provided on the inside of the heat transmitter ( 10 ) and ribs ( 9 ) are provided on the end of the regenerator ( 5 ) facing said heat transmitter ( 10 ) in such a way that the ribs ( 9 ,  10 ) intermesh when the regenerator ( 5 ) is in its expansion end position.  
     
     
         2 . Cold component of  claim 1 , characterized in that the ribs ( 13 ,  9 ) of the heat transmitter ( 10 ) and of the regenerator ( 5 ) have a trapezoidal cross-section.