JP2007255214A5 - - Google Patents

Claims (7)

A sealed container having a discharge port above a predetermined position;
A motor comprising a stator provided in the hermetic container and a rotor disposed inside the stator;
A compression mechanism that is provided below the motor in the sealed container and is driven by a drive shaft that is fitted into the rotor;
Lubricating oil that lubricates the compression mechanism is sealed in the bottom of the hermetic container, and at least the rotor of the motor is formed with a gas flow path including a plurality of through holes communicating in the axial direction at both upper and lower ends. A substantially disc-shaped oil separation plate that is held at a predetermined interval from the upper end of the rotor and rotates together with the rotor.
The oil separation plate includes a disc portion and a cylindrical wall that is erected at a right angle to the disc portion and has a hollow hole formed in a rotation center portion, and the inside of the cylindrical wall is the drive A hermetic electric compressor characterized in that a shaft is inserted and held by an interference fit. The motor includes a first gas flow path having a total cross-sectional area A ₁ including a plurality of through-holes communicating with the upper and lower ends of the rotor in the axial direction;
A _second gas flow having a total cross-sectional area A ₂ composed of an air gap secured between the outer peripheral surface of the rotor and the inner peripheral surface of the stator and a groove portion formed from the opening of the coil receiving slot in the stator to the inner peripheral surface of the stator. Road,
The motor comprises a plurality of through-holes formed on the outer peripheral side of the stator winding and on the inner side of the inner wall of the airtight container and communicating the upper and lower ends of the motor in the axial direction, and is smaller than both A ₁ and A ₂ hermetic electric compressor according to claim 1, characterized by forming a third gas flow path including the cross-sectional area a _3. The A ₁ is larger than the A ₂ , and the outer diameter of the disk portion of the oil separation plate is larger than the plurality of through-hole portions communicating with the upper and lower ends of the rotor in the axial direction and larger than the outer diameter of the rotor. 3. The hermetic electric compressor according to claim 2, wherein the hermetic electric compressor is small. The predetermined interval at which the oil separation plate is separated from the upper end of the first gas flow path is ± 50% with respect to the radius of an equivalent circle having the total cross-sectional area of the first gas flow path as A ₁ . The hermetic electric compressor according to any one of claims 1 to 3, wherein the electric compressor is within a range.   The hermetic electric compressor according to any one of claims 1 to 4, wherein the oil separation plate has a disk portion formed such that the vicinity of the outer periphery gradually descends outward. Refrigerating cycle apparatus characterized by using a hermetic electric compressor according to any one of 請 Motomeko 1-5.   CO as refrigerant ₂ The refrigeration cycle apparatus according to claim 6, wherein a refrigerant is used.