| 摘要 |
PURPOSE: An oil returning apparatus for a turbo cooler is provided to separate oil in an evaporator, and regenerate refrigerants so that the pollution is prevented. CONSTITUTION: An oil returning apparatus for a turbo cooler comprises a middle pipe(110), an inner pipe(120), and an outer pipe(130). The middle pipe comprises an inflow path(111), a return path(112), and a gas discharge path(113). The inflow path sucks fluid mixed with oil and refrigerants from an evaporator(400). The return path delivers only oil separated from the refrigerants. The middle pipe discharges refrigerant gas separated from the oil. High temperature condensed refrigerants from a condenser(300) pass through the inner pipe. The inner pipe supplies a heat source which separates the refrigerants and oil. The outer pipe encloses the whole middle pipe or a part of the middle pipe. The outer pipe lets the refrigerant gas pass through. The outer pipe supplies the heat source, and collects the heat source to an economizer(500). [Reference numerals] (AA) High temperature refrigerant gas; (BB) Refrigerant; (CC) Refrigerant + oil; (DD) High temperature condensed refrigerant; (EE) Oil |
