| 摘要 |
The present invention relates to a pressure valve for a compressor, particularly for a hermetically sealed refrigerator, whose valve plate has a longitudinal recess containing a valve seat, a flat valve spring and a retainer bridge, where the effective length of the flat valve spring is larger when the valve is closed that when it is open. As a result, the valve is soft when it is near its closed position, and stiff when it is open. This ensures quick emptying of the cylinder with minimum pressure drop across the pressure valve, and the efficiency of the compressor is increased.
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