Spiral refrigeration compressor, has non-return valve moved between closed position and open position, and elastic sealing device placed around seat and cooperated with valve, when valve is in closed position

摘要

The compressor has a reverse running stop comprising a valve seat (18) for surrounding a discharge opening (15). A non-return valve is moved between a reverse running stop closed position, in which the valve is supported against the valve seat, and a reverse running stop open position, in which the valve is supported against a retaining device. An elastic sealing device (22) e.g. ring seal, is placed around the seat and cooperated with the valve when the valve is in the closed position. A metallic core (26) of the sealing device is covered with a PTFE layer (27).