Patent ID: 9194395
Filing Date: 2015-11-24
Classification: F04C

Abstract:
1. A scroll refrigeration compressor comprising: a stationary volute and a moving volute having an orbital movement, the stationary volute and the moving volute each including a plate from which extends a scroll, the scrolls of the stationary and moving volutes being engaged with each other and delimiting a plurality of variable-volume compression chambers, a delivery chamber, a delivery line in a central portion of the plate of the stationary volute including a first end that opens into a central compression chamber and a second end configured to communicate with the delivery chamber, an anti-return device including: a first bypass passage including a first end that opens into the delivery line at a location located between the central compression chamber and the valve seat, and a second end that opens into an intermediate compression chamber, the first bypass passage including: a first bypass valve moveable between an obturation position in which the first bypass valve obturates the first bypass passage to prevent the delivery line from communicating with the intermediate compression chamber into which opens the bypass passage, and a release position in which the first bypass valve clears the first bypass passage so that the delivery line communicates with the intermediate compression chamber into which opens the first bypass passage, the first bypass valve being configured to be displaced into the release position when the pressure in the intermediate compression chamber into which opens the first bypass passage exceeds the pressure in the delivery line by a second predetermined value.