VARIABLE CAPACITY ROTARY COMPRESSOR

摘要

A variable capacity rotary compressor is provided to lower initial discharge pressure applied to a vane guide groove by using a throttling unit installed at any one of a high pressure pipe and a connecting pipe of a vane control unit. A variable capacity rotary compressor comprises a housing, first and second vanes(43,53), first and second vane guide grooves(44,54), and a vane control unit(60). The vane control unit has a control valve(64), a connecting pipe(61), a high pressure pipe(62), a low pressure pipe(63), and a throttling unit(80). The control valve is installed at the vane guide grooves, changes the pipes to selectively apply discharge pressure and suction pressure. The connecting pipe connects the vane guide groove and the control valve. The high pressure pipe connects an outlet of the compressor and the control valve. The low pressure pipe connects an inlet of the compressor and the control valve. The throttling unit reduces at least one of the high and the low pressure pipe's bore size to lower initial discharge pressure exerted to the vane guide groove.