(57) Abstract Objective From freon refrigerant encountering to conversion to NH3 refrigerantBe able to correspond easily without replacing the te and the compressor itself,The ru 2 forma screw compressor is offered. Constitution Bearing 21,22 inflow the lube, here?And others motor 12 of the type which it flows out, coupling section 13, the 1st compressor which possesses the 1st casing 17 of low pressure step sideComputer 2nd compressor itself 15 of 11 and high-pressure stage side this sequenceTo be joined with beginning, the 1st compressor itself 11 and the couplingSection 13 being separation possible, the 1st casing of rotor shaft 19In the complete penetration section which penetrates 17 the mechanical seal configuration space 20 and,At lower part of coupling section 13, space inside this and 1st1st inlet port inside 16 of compressor itself 11 and motor 12The blockade possible 1st and 2nd perforation hole 2 which makes with the section space communicateAt cartridge head of 4,25 and coupling section 13 inside and outside thisIt provides with the 3rd perforation hole 26 which, it makes communicate at the same time removes possibilityClosing the 3rd perforation hole 26 with plug, 27 it is formed.
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