| 摘要 |
PURPOSE:To lubricate stably to a compressor by opening a deflation hole communicating with an eccentric lubrication hole in the crank shaft to the outercircumference of a balance weight formed integrally with the crank shaft thereby discharging gas in the crank shaft reliably. CONSTITUTION:As the crank shaft rotates, refrigerant gas dissolved in lubricant is gassified during lubrication and the lubricant is pressed centrifugally against the innercircumferential face of an eccentric hole 8 while gas will remain in the inside to be separated. Since a deflation hole 20 is opened to the outercircumference of a balance weight 4a, where the circumferential speed of crank shaft is high, the pressure at the opening will drop below the inner pressure of an enclosed container 1 thus to suck/discharge refrigerant gas. Since the pressure in the eccentric hole will drop through discharge of refrigerant gas, the lubrication head will increase resulting in stable lubrication.
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