| 摘要 |
PURPOSE: Oil supply structure of a scroll compressor is provided to increase efficiency and cut down expenses by improving pump characteristic. CONSTITUTION: Oil supply structure of a scroll compressor comprises an oil supply hole(39) formed in the center of the lower end portion of a crankshaft(30); a first-stage inclined supply hole(31), connecting from the upper end of the oil supply hole to the outer peripheral surface of the middle part of the crankshaft; a connection hole connected to the upper end of the first-stage inclined supply hole, passing though the middle part of the crankshaft; a reverse flow-preventing unit installed in the connection hole, to prevent reverse flow of oil; and a second-stage supply hole(35), connecting from a side end of the connection hole to the upper end of the crankshaft. The reverse flow-preventing unit comprises a check valve(37) installed inside the connection hole to prevent reverse flow of oil, a fixing pin(36) installed at the inlet portion of the connection hole to prevent separation of the check valve, and a spring(38) installed at the rear end of the check valve to elastically support the check valve. Thus, centrifugal force is secured three times compared with a usual one-stage centrifugal pump and the pump characteristic is improved.
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