Heat regenerator formed by capillary and suction pipe has an important influence on the performance of small refrigeration equipment. At present

there are four main types of regenerator: capillary wear type

aluminum foil cover type

copper and tin welding type

capillary inside pipe type. Combining with theoretical analysis

the refrigeration performance of regenerator was experimentally studied by capillary inlet and outlet temperature

suction pipe inlet and outlet temperature

evaporator temperature and discharge temperature of compressor suction. The results show that

wear inside the capillary regenerator and copper tin welding type regenerator have the same performance in heat transfer performance. However

the refrigerating capacity per unit of swept volume of capillary inside pipe type regenerator was 17.4% higher than that of capillary wear type and aluminum foil cover type regenerator under the same conditions. The performance of refrigerator can be improved by using capillary inside pipe type regenerator.