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US 4,907,414 AGranted
Refrigerant injection into oil for sound reduction
AssigneeCarrier Corporation
InventorsHoward H. Fraser, Jr., Jacob A. Bayyouk
Life of this patent
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Abstract
In a low side hermetic compressor, a small portion of the compressed refrigerant gas is diverted and discharged into the oil sump through an orifice into the upper level of the oil in the sump. This results in a supersaturated solution of refrigerant in oil in the upper level which drives the refrigerant out of the oil, thereby creating froth which provides sound reduction without disturbing the lower level which remains stratified.
Claims3
A method for reducing radiated sound levels in low side hermetic compressors comprising the steps of:
- supplying pressurized refrigerant to a muffler which is in fluid communication with a discharge line;
- diverting a small portion of the pressurized refrigerant supplied to the muffler;
- and
- injecting the diverted pressurized refrigerant into an oil sump at a point beneath the surface of the oil whereby a supersaturated solution of refrigerant in oil is created in the upper level of the oil in the sump which drives the refrigerant out of the oil in the upper level to create a froth without disturbing the lower level of the oil in the sump.
1 more element
Dependencies are inferred from the claim text.