REFRIGERATOR AND DEFROSTING HEATER

摘要

PROBLEM TO BE SOLVED: To suppress the firing risk of flammable refrigerant even if defrosting is carried out under such an environment as the flammable refrigerant leaked into the atmosphere where a refrigerator is installed by setting the temperature of a defrosting means lower than the firing temperature of the flammable refrigerant. SOLUTION: The evaporator 10 in a refrigeration cycle is cooled through operation of a compressor and the air in a refrigerator ventilates the evaporator 10. The chill subjected to heat exchange with the evaporator 10 is then delivered into the refrigerator. Upon elapsing an arbitrary operating time of a compressor 19, a defrosting means 18 is operated. The defrosting means 18 is heated at a temperature lower than the firing point of flammable refrigerant used in the refrigeration cycle to defrost the evaporator 10 thus preventing uncooled state in the refrigerator due to frosting periodically. Risk of firing is lowered even if the flammable refrigerant in the refrigeration cycle is leaked into the compartment of the refrigerator because the temperature of the defrosting means 18 is lower than the firing point of flammable refrigerant used in the refrigeration cycle.