| 摘要 |
A variable capacity rotary compressor is provided to simplify a vane control unit by making direct communication between a connection pipe and a closed chamber and ensure fast discharge of gas within the closed chamber by minimizing the capacity of the closed chamber without generating noise and chattering. A variable capacity rotary compressor comprises a housing(10), first and second vanes(43,53), first and second vane guide grooves(44,54), and a vane control unit(60). The housing includes first and second compression chambers(31,32) that are divided from each other. The first and second vanes advance and retreat to/from the radial direction of the first and second compression chambers. The first and second vane guide grooves are provided in the housing to guide the first and second vanes. The first vane guide groove include a closed chamber(46) receiving the rear end of the first vane and in communication with a path of the vane control unit, wherein the closed chamber has an inside corresponding to an external shape of the rear end of the first vane to minimize its internal capacity. The vane control unit performs constraint control of the first vane by using suction pressure and discharge pressure, comprising a connection pipe(61) in direct communication with the closed chamber, a high pressure pipe(62) connecting discharge side of the compressor and the connection pipe, a low pressure pipe(63) connecting suction side of the compressor and the connection pipe, and an opening/closing valve(64) for selective connection of the high pressure pipe and low pressure pipe to the connection pipe.
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