COOLER

摘要

PURPOSE: A cooler is provided to make an endothermic fin and a radiating fin in and out of a base be smaller and accordingly to reduce the size. CONSTITUTION: A cooler includes a radiating member(19) gradually lowering the energy level of refrigerant gas in a cycle process being from an expansion space(30b) through a regenerator(40) to a compression space(30a) by discharging some of heat energy of the refrigerant gas which is compressed in the compression space and the temperature thereof is increased. The radiating member comprises a tubular base(191) connecting a hermetic container(10) and a cold finger tube(14), an endothermic fin(192) formed in the base, and a radiating fin(193) formed out of the base. Therefore, a discontinuous plane contacting with the refrigerant gas doesn't exist from the endothermic fin to the radiating fin due to a monolithic structure of the radiating member, and accordingly thermal conductivity is highly kept and radiation efficiency is not reduced.