SEALED ELECTRICAL COMPRESSOR Russian patent published in 2011 - IPC F04B39/00 F25B31/00 

FIELD: engines and pumps.

SUBSTANCE: proposed sealed electrical compressor 1 has normally-open pressure switch 7 and fuse 6. Said pressure switch 7 is arranged in tight casing 2 connected in parallel with main winding 3A of motor 3 and short-circuits main winding 3A at excess pressure of coolant in tight casing 2. Fuse 6 is connected in series with main winding 3A and auxiliary winding 3B of motor 3 to interrupt current flow to said motor at over current that originates when pressure switch 7 short-circuits main winding 3A.

EFFECT: protection of element an engine operated at high pressure.

6 cl, 8 dwg