PURPOSE: To prevent the corrosion of the inside surfaces of a freon gas generator and to suppress the decomposition of the freon gas by applying a specific surface treatment on the inside surface of said generator made of steel in an absorption type refrigerator using freon as a refrigerant.
CONSTITUTION: The gaseous freon generated from an evaporator 1 of an absorption type refrigerator using said gas as a refrigerant is absorbed into the absorbing liquid of a polar org. solvent in an absorber 2 and is pumped 6 into a freon generator 3 through a heat exchanger 5. Here the liquid is heated and gaseous freon is generated. This gas is cooled in a condenser 4 to form high pressure freon liquid which is released by an expansion valve 7 and after said liquid performs a cooling effect by absorbing heat, the liquid enters the evaporator. Here the Fe2O3 on the surfaces of the steel materials constituting the generator 3 and the freon react to decompose the freon, and the steel materials are corroded by said decomposition. In order to prevent the corrosion the inside surface of the generator is treated with a treating soln. contg. zinc phosphate and manganese phosphate whereby films for preventing corrosion are formed.
SHIYOUJI SABUROU
TAKAMURA TOMOE
ITOU TADASHI
