Noise dampening means in refrigeration motor-compressor units and method
AssigneeCarrier Corporation
InventorCarl J. De Groat
Life of this patent
Estimating the term…
Abstract
A motor-compressor unit is resiliently mounted within a shell defining a lubricating oil sump. The compressor includes a primary oil pump having its inlet submerged in the oil sump to pump said oil to lubricate various compressor components. A secondary oil pump has its inlet in fluid flow communication with the oil sump. The secondary oil pump agitates said oil and increases the velocity thereof to cause any gas entrained therein to separate therefrom. The separated gas and agitated oil is directed by a distributor radially outward through the oil and over the outside surfaces of the compressor to absorb acoustical energy generated thereby.
Claims9
Refrigeration apparatus comprising:
- a shell defining a lubricating oil sump;
- a motor-compressor unit resiliently mounted within said shell, said compressor including a crankshaft connected to the rotor of said motor to rotate therewith;
- first pump means having its inlet submerged in the oil contained in said sump to supply said oil to lubricate said compressor;
- secondary pump means including an inlet for receiving a portion of said lubricating oil contained in said sump to agitate said oil and to cause any refrigerant entrained therein to separate therefrom as a gas;
- and
- distributor means to receive said agitated oil and separated refrigerant gas and direct said oil and gas radially outward through the oil stored in said sump to reduce the noise transmission capability of said stored oil.
Refrigeration apparatus comprising:
- a shell defining a lubricating oil sump;
- a motor-compressor unit resiliently mounted within said shell and including a crankshaft connected to the rotor of said motor to rotate therewith;
- a primary oil pump including a pickup tube submerged within the oil contained in said sump, and an eccentric oil passage provided in said crankshaft in fluid flow communication with the discharge opening from said oil pickup tube;
- a thrust washer connected to said cylinder block, submerged in said oil, and including a central bore concentrically disposed with respect to said oil pickup tube to define therebetween an annular oil passageway;
- a secondary oil pump having its inlet in fluid flow communication with said annular oil passageway and including a radially extending passageway provided in said crankshaft, with the oil flowing through said annular passageway passing into the center of said radial passageway, and being centrifuged outwardly to agitate said oil to cause refrigerant entrained therein to separate therefrom as a gas;
- and
- distribution means to receive said agitated oil and separated gas and direct said oil and gas radially outward through the oil stored in said sump to decrease the noise transmitted by the oil from the compressor to the shell.
A method of reducing the noise transmitting capability of a body of oil having a motor compressor unit partially submerged therein comprising the steps of:
- agitating a portion of the body of oil to cause refrigerant entrained therein to separate therefrom as a gas;
- directing the agitated oil and separated gas radially outward through the body of oil to form bubbles in the oil which reduce the noise transmitting capability of the body of oil;
- and
- directing compressed refrigerant gas toward said agitated oil and separated refrigerant gas to intermix therewith to increase the quantity of bubbles formed in the body of oil.
Dependencies are inferred from the claim text.