Scroll compressor and air conditioner using the same

A scroll compressor comprising a closed container, an electric motor and a compression mechanism connected to said electric motor through a crankshaft, said compression mechanism, crankshaft and electric motor being lodged within said closed container, said compression mechanism including at least two scrolls each having a spiral lap protruding straight from an end plate, said two scrolls being engaged with each other with their laps being on the inner side, one scroll making an orbiting movement relative to the other scroll while being prevented from rotating, said scroll compressor being installed in such a way that said crankshaft is maintained substantially horizontal, said small compressor further comprising a separation plate which is resistant to gaseous fluid and which separates the interior of said closed container into a first space lodging said electric motor, crankshaft and compression mechanism and a second space having a discharge pipe for transferring compressed refrigerant gas from the closed container to an outer cycle,

• wherein a communicating section to allow communication between said two separated spaces is provided in the section of said separation plate which is below the center of rotation of said electric motor,
• wherein a back chamber is provided on the side of the orbiting scroll opposite to the lap thereof, the pressure of said back chamber being kept somewhere between a suction pressure and a discharge pressure, a sub-bearing rotatably supporting said crankshaft in the vicinity of that end of said crankshaft opposite to a joint section of the crankshaft leading to said compression mechanism,
• a support plate supporting said sub-bearing and being held by the inner peripheral surface of said closed container, said support plate having a cutout below a position corresponding to the outer periphery of a rotor of said electric motor,
• a cup covering said sub-bearing, said cup being secured to that section of said support plate which is on the side of said crankshaft end supported said sub-bearing, and
• wherein said cup has an oil feeding pipe communicating with the interior of said cup covering said sub-bearing and extending downwards from said cup into said second space within said closed container, said separation plate being provided between said oil feeding pipe and said support plate, and a gas passage being provided between said separation plate and said support plate.