| 摘要 |
<p>The invention provides an oil-cooling type secondary compressor and a heat pump ensuring oil circulation and maintaining performances even if a change happens in the suction pressure and the discharging pressure. The oil-cooling type secondary compressor comprises a primary compressing part sucking gas from a suction path, compressing the gas together with oil and then discharging the compressed gas toward a middle pressure space; a secondary compressing part sucking gas from the middle pressure space, compressing the gas together with oil and discharging the gas towards a discharge path, an oil supply path supplying oil to bearings on the discharge side of the secondary compressing part, an an oil loop path for making oil flowing out from the bearings on the discharge side of the secondary compressing part flow circularly towards a sealing space of a space serving as a compressing path of the primary compressing part.</p> |
