Patent ID: 9097253
Filing Date: 2015-08-04
Classification: F04C

Abstract:
1. A scroll refrigeration compressor comprising: a sealed casing containing a stationary scroll and a moving scroll following an orbital movement, each scroll including a scroll plate from which a spiral wrap extends, the spiral wraps of the stationary and moving scrolls being engaged in one another and defining variable-volume compression chambers, a separating plate sealably mounted on the scroll plate of the stationary scroll, the separating plate and the scroll plate of the stationary scroll defining at least one first intermediate volume, a delivery chamber at least partially defined by the separating plate and the sealed casing, at least one bypass passage arranged to communicate the first intermediate volume with an intermediate compression chamber, at least one flow passage arranged to communicate the first intermediate volume with the delivery chamber, at least one bypass valve associated with the flow passage, each bypass valve associated with a flow passage being mounted on a surface of the separating plate turned toward the delivery chamber and movable between closing and opening positions for closing and opening the corresponding flow passage, and being configured to be moved into the opening position when the pressure in the corresponding flow passage exceeds the pressure in the delivery chamber by a predetermined value.