초록 ▼

A rotary-vane compressor wherein the pump housing is formed with a first by-pass passage which is open at its one end to the first intake port of the two intake ports which are open to the pump chamber formed in the rotor and at its the other end with the high-pressure chamber formed in the main hou

A rotary-vane compressor wherein the pump housing is formed with a first by-pass passage which is open at its one end to the first intake port of the two intake ports which are open to the pump chamber formed in the rotor and at its the other end with the high-pressure chamber formed in the main housing, and provided with first by-pass valve means so that the first by-pass passage is opened when an external signal is supplied, and the first ring plate mounted on one side of the cam ring is provided with an one-way flow check valve to block fluid communication between the first intake port and the low-pressure chamber to which a new refrigerant is conducted, only when the first by-pass passage is opened.

대표청구항 ▼

A rotary-vane compressor comprising: a main housing formed with a high-pressure chamber; a front-housing plate secured to said main housing and formed with a low-pressure chamber; and compression means arranged within said main housing; said compression means comprising a pump housing comprising a c

A rotary-vane compressor comprising: a main housing formed with a high-pressure chamber; a front-housing plate secured to said main housing and formed with a low-pressure chamber; and compression means arranged within said main housing; said compression means comprising a pump housing comprising a cam ring formed with a substantially eliptical cam surface and first and second ring plates mounted on said cam ring to close said cam ring, a rotor rotatably supported within said cam ring and formed with a plurality of substantially radially extending slots and a plurality of back-pressure passages each held in fluid communication with an radially inward end of the corresponding slot, and a plurality of vanes each received slidably in the corresponding slot, lubricating oil in said high-pressure chamber being conducted to said back-pressure passages; said cam surface of said cam ring and an outer peripheral surface of said rotor forming a pump chamber; said cam ring being formed with first and second intake ports which respectively communicate at their one ends with said low-pressure chamber and at their the other ends with said pump chamber and a pair of discharge ports which respectively communicate at their one ends with said pump chamber and at their the other ends said high-pressure chamber, wherein said pump housing is formed with a first by-pass passage which is open at its one end to said first intake port and at its the other end with said high-pressure chamber, and provided with first by-pass valve means so that said first by-pass passage is opened when an external signal is supplied, and said first ring plate is provided with an one-way flow check valve to block fluid communication between said first intake port and said low-pressure chamber only when said first by-pass passage is opened.