structure of low pressure type scroll compressor with reverse flow protection

摘要

The present invention relates to a low-pressure type scroll compressor, pump down during operation in the high pressure by the vacuum preventing device parts of the low-pressure refrigerant gas is bypassed is to prevent reverse flow through the suction pipe to the outside. ; to the invention To this end, the suction inlet of the refrigerant into the closed vessel 10, 20 and ; The suction pipe 20, the fixed scroll to compress the refrigerant flowing through 40 and the orbiting scroll (50) and; A discharge pipe 30 for discharging the compressed refrigerant gas by the fixed scroll 40 and the orbiting scroll (50); And a vacuum preventing unit 80 to bypass the low-pressure portion of the suction pipe 20 side at the pump-down operation for the high pressure refrigerant gas compressed by the fixed scroll 40 and the orbiting scroll (50); The suction pipe 20 is provided in the, non-return to the low-pressure refrigerant gas is bypassed from the high pressure portion by the vacuum preventing unit 80 during the pump-down operation to prevent the back flow through the suction pipe 20 means The backflow preventing structure of a low pressure type scroll compressor is provided comprising a.