| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem: if a hermetic compressor starts at high speed for the rapid start for heating, or a rotating range of the compressor is expanded to the high-speed rotating range to obtain high heating capacity, the pressure below a hermetic container of the hermetic compressor is rapidly increased by refrigerant gas to be discharged from a compression element below the hermetic container, consequently the flow speed of the refrigerant gas passing an electric-driven element upwardly from a lower side of the hermetic container is rapidly increased, so that the amount of refrigerant gas containing refrigerating machine oil to be blown above a rotor caused by through-holes formed in the rotor of the electric-driven element is increased, and therefore the refrigerant gas is discharged from a discharge pipe above the rotor while the refrigerant gas contains the refrigerating machine oil, and the amount of the refrigerating machine oil in the hermetic compressor becomes insufficient. <P>SOLUTION: The through-holes are formed in electric steel sheets constituting the rotor, and through-holes are also formed in rivets for caulking the electric steel sheets to increase the area of a refrigerant flow passage passing through the inside of the rotor. <P>COPYRIGHT: (C)2012,JPO&INPIT |
