DEFROSTER FOR REFRIGERATORS AND METHOD OF CONTROL OF SUCH DEFROSTER Russian patent published in 1999 - IPC

FIELD: refrigerating engineering. SUBSTANCE: device is used for control of defrosting procedure of evaporators connected with freezing and refrigerating chambers of refrigerator. Refrigerating chamber is cooled irrespective of internal temperature of freezing chamber when internal temperature of refrigerating chamber exceeds preset temperature, thus refrigerating chamber is kept at temperature below preset limit. Defrosting is effect in accordance with time of switching-on the compressor and fan of refrigerating chamber when internal temperature of refrigerating chamber exceeds preset temperature even through compressor and fan of refrigerating chamber operate continuously, thus enhancing refrigerating efficiency. In case of fast cooling, moment of time when defrosting of refrigerating chamber is started is accurately determined through calculation of temperature drop gradient on basis of change of internal temperature of refrigerating chamber. In case of fast defrosting, moment of time when defrosting of freezing chamber is started is accurately determined through calculation of temperature drop gradient on basic of internal temperature of freezing chamber. In any case defrosting may be effected efficiency. EFFECT: enhanced reliability of operation of device and retaining quality of products. 18 cl, 15 dwg