| 摘要 |
After the tooth portion 102 b of the stationary scroll 102 and the tooth portion 103 b of the revolving scroll 103 have contacted each other on one contact face 121 in the central portion of the scroll (shown in FIG. 5 A), when this contact face 121 is shifted to two sliding contact portions 122, 123 , the operating chamber V is formed between the two sliding contact portions 122, 123 (shown in FIG. 5 B), and the refrigerant introducing port 105 a is open to the region on the contact face 121 . Accordingly, the operating chamber can be instantaneously changed over while the sealing property is ensured. Due to the above structure, the sealing property for suppressing leakage from the high pressure side at the time of the expansion mode can be compatible with the smoothing property for smoothing a change-over of the scroll operating chamber successively formed.
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