Question

What is the use of a Hermetic sealed compressor?
1. It is used in domestic refrigerators to prevent leakages of refrigerant.
2. It is used in aircraft engines to supply air to the cabin
3. It is used to supply air at constant low volume in high pressure applications such as in industrial operation.
4. It is used to supply air at low pressure in high volume applications such as air curtains

Answer 1

Correct Answer - Option 1 : It is used in domestic refrigerators to prevent leakages of refrigerant.

Concept:

• A hermetic or sealed compressor is one in which both compressor and motor are confined in a single outer welded steel shell.
• The motor and compressor are directly coupled on the same shaft, with the motor inside the refrigeration circuit.
• Thus, hermetically sealed compressors and motor don’t require the shaft seal and there is no problem of refrigerant leakage.
• Hermetically sealed compressors cannot be serviced due to being contained within the welded unit.