JPH0452982U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a diagram showing the structure of the return path based on the gravity difference in a reciprocating and hermetically operated electric compressor, and Figure 2 is a diagram showing the structure of the return path based on pressure application of refrigerant gas for lubricating oil in the same electric compressor. It is. 1: Compressor, 2: Sealed electric motor, 3: Crankshaft, 4: Lubricating oil pump, 5: Pump discharge pipe, 6, 7: Bearing section, 8: Motor frame, 9: Stator core, 10: Communication hole , 11: Partition wall, 12: Rotor, 13: Rotor chamber, 14: Pressure equalization hole, 15: Compressor discharge pipe, 16: Check valve, 17: Pressure pipe, 18
: Oil sump chamber, 19: Throttle valve.

Claims (1)

[Claims for Utility Model Registration] (1) In a forced lubricating oil supply system of a sealed electric compressor that is integrated with a sealed electric motor and a refrigeration compressor, supporting a bearing portion of a drive shaft of the electric motor; A communication hole for return oil flowing into the oil sump chamber of the compressor is provided at the lowest part of a partition wall that partitions the two, and the refrigerant gas pressure in the rotor chamber of the electric motor is always equal to or higher than the oil sump chamber. A structure of a bearing lubricating oil return path of a sealed electric compressor, characterized in that the bearing lubricating oil return path is maintained at a constant temperature. (2) In the structure of the electric compressor in which the bottom of the rotor chamber of the electric motor is at the same height as the oil level in the oil sump chamber of the compressor or at a position higher than the oil level, the bottom of the partition wall is provided with an oil return valve at the lowest part of the partition wall. 2. The bearing lubricating oil return for a sealed electric compressor according to claim 1, further comprising a communication hole and a pressure equalizing hole having a check valve that allows refrigerant gas to flow in an area above the drive shaft. Road structure. (3) In the structure of the electric compressor in which the bottom of the rotor chamber of the electric motor is located at a lower position than the oil level of the oil sump chamber of the compressor, the oil return communication hole is provided at the lowest part of the partition wall, and the A pressure equalization hole having a check valve is provided in the upper part of the partition wall, or this hole is closed, and a part of the refrigerant gas discharged from the compressor is depressurized and guided into the rotor chamber of the electric motor, and the chamber is pressurized. The structure of a lubricating oil return path of a sealed electric compressor according to claim 1.