Patent ID: 8794940

Claim:
A scroll-type refrigerator compressor comprising first and second volutes describing an orbital relative movement, the first volute including a first plate from which a first spiral extends, and the second volute including a second plate from which a second spiral extends, the first and the second spirals being engaged one inside the other and delimiting at least two compression chambers of variable volume, wherein the compressor includes: at least one housing made in the first plate and extending from a surface of the first plate that is turned towards the first and the second spirals, the housing opening out into one of the compression chambers, means for injecting refrigerant fluid, opening out into the housing, an anti-return device mounted in the housing, the housing including an introduction aperture that introduces the anti-return device into the housing, the introduction aperture being turned towards the first and the second spirals and opening out into one of the compression chambers, the anti-return device being arranged so as to prevent communication between the means for injecting refrigerant fluid and the compression chamber into which the introduction aperture of the housing opens out in a first closed position, and being arranged so as to allow communication between the refrigerant fluid injection means and the compression chamber into which the introduction aperture of the housing opens out in a second open position, and a partial obturation device mounted in the housing and arranged in order to partly obturate the housing, the obturation device delimiting at least partly a passage orifice for letting through refrigerant fluid, opening out into one of the compression chambers, the passage orifice being arranged so as to connect said compression chamber with the refrigerant fluid injection means when the anti-return device is in its open position, wherein the introduction aperture is located on a side of the obturation device.