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发明公开
CN101573509A 涡旋膨胀机 失效 - 放弃专利权

涡旋膨胀机
摘要：
一种涡旋膨胀机，具有膨胀机构(5)、副压缩机构(6)、及密封圈(23)；该膨胀机构(5)由摆动涡旋件(52)和第1固定涡旋件(51)构成，使制冷剂膨胀并回收动力；该副压缩机构(6)由摆动涡旋件(62)和第2固定涡旋件(61)构成，利用由膨胀机构(5)回收的动力驱动，对制冷剂进行压缩；该密封圈(23)设在副压缩机构(6)的外周部和膨胀机构(5)的外周部的至少一方；设置有开口于密闭容器(10)内的上部空间(70)的油路(17)，使上部空间(70)和下部空间(72)处于副压缩机构(6)的压缩后压力状态，在下部空间(72)中具有与主压缩机(11)连通的油配管(80)。由简单的结构抑制回收动力的下降，获得在广泛的运行条件下效率良好、低成本的涡旋膨胀机。
摘要（英）：

A scroll expander has an expansion mechanism (5) constructed from a swing scroll (52) and a first fixed scroll (51) and recovering power by expanding refrigerant, a sub compression mechanism (6) constructed from a swing scroll (62) and a second fixed scroll (61), driven by the power recovered by the expansion mechanism (5), and compressing the refrigerant, and a seal ring (23) fitted to at least either the outer periphery of the sub compression mechanism (6) or the outer periphery of the expansion mechanism (5). An oil passage (17) opened to an upper space (70) inside a closed container (10) is formed in the expander so that the pressure in the upper space (70) and a lowers pace (72) is the pressure after compression is made by the sub compression mechanism (6). Oil piping (80) communicating with a main compressor (11) is installed in the lower space (72). The scroll expander can recover power with a minimum loss by a simple structure, operates efficiently in a wide range of operating conditions, and is manufacturable at low cost.

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