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Cryosurgery is an effective way of curing many diseases including tumors and cancers.It can be applied using a variety of systems and cryogens.Cheap,convenient,reliable equipment still needs to be developed so that cryotherapy may be accepted by surgeons and hospitals.This paper presents a cryosurgery apparatus that utilizes an auto-cascade refrigeration system.Refrigerant mixture R50/R23/R600a was selected as the working fluid.The mixture composition was altered to achieve lower temperatures and higher capacity.The lowest temperature at the cryoprobe could be as low as -100 °C,and 8 W refrigeration capacity could be obtained at -80 °C.An ice ball of 11.6 mm diameter could be formed when the cryoprobe was immersed in a water bath at 37 °C.
Cryosurgery is an effective way of curing many diseases including tumors and cancers .It can be applied using a variety of systems and cryogens.Cheap, convenient, reliable equipment still needs to be developed so that cryotherapy may be accepted by surgeons and hospitals.This paper presents a cryosurgery apparatus that utilizes an auto-cascade refrigeration system. Refrigerant mixture R50 / R23 / R600a was selected as the working fluid. The mixture composition was altered to achieve lower temperatures and higher capacity. The lowest temperature at the cryoprobe could be as low as -100 ° C, and 8 W refrigeration capacity could be obtained at -80 ° C. Anne ice ball of 11.6 mm diameter could be formed when the cryoprobe was immersed in a water bath at 37 ° C.