| 摘要 |
PURPOSE: An economizer of a multi-stage freezer apparatus is provided to separate gas refrigerant and liquid refrigerant by rotating the refrigerant before entering the economizer, thereby improving the performance of the economizer. CONSTITUTION: An economizer of a multi-stage freezer apparatus comprises a rotation guide part(130) and an inner pipe(120). The rotation guide part is installed in an inlet pipe which is extended from an expansion valve to an economizer(100) and guides the refrigerant flowing through the inlet pipe to rotate. One end of the inner pipe is located inside the inlet pipe, separate from the rotation guide part, while the other is located on the upper side in the economizer. Specifically, the inner pipe passes through the liquid surface of the liquid refrigerant and is separated by the economizer so that the other end is located in gas refrigerant(103).
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