Rotary air compressor with thermally responsive oil injection

摘要

A rotary air compressor of oil sealed type includes a stator containing a rotor, oil injectors arranged to inject oil into the interior of the stator, an oil sump connected by a first oil pathway to the oil injectors and an oil cooler situated in the first oil pathway. A thermally responsive valve situated in the first oil pathway is arranged to open only when the temperature of the oil has reached a predetermined value whereby no oil is injected through the oil injectors before the temperature of the oil has reached the said predetermined value.