OIL CIRCULATION SYSTEM FOR A REFRIGERATION CHILLER
First Claim
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1. A system for circulating compressor lubricant from the evaporator of a refrigeration chiller comprising:
- A condenser;
An evaporator coupled to the condenser, the evaporator containing a liquid refrigerant phase and an oily liquid having a higher concentration of oil than the liquid refrigerant phase;
A compressor, having a suction inlet, the compressor coupled to the evaporator and the condenser;
An atomizing nozzle positioned to atomize oily liquid within gas coming from within the evaporator, and;
A pump for pumping oily liquid from the evaporator through the atomizing nozzle.
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Abstract
An oil circulation system for a refrigeration chiller including a pump coupled to an atomizing spray nozzle located near the compressor suction inlet spraying a fine mist of oily liquid from the evaporator to be aspirated by the compressor.
7 Citations
28 Claims
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1. A system for circulating compressor lubricant from the evaporator of a refrigeration chiller comprising:
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A condenser; An evaporator coupled to the condenser, the evaporator containing a liquid refrigerant phase and an oily liquid having a higher concentration of oil than the liquid refrigerant phase; A compressor, having a suction inlet, the compressor coupled to the evaporator and the condenser; An atomizing nozzle positioned to atomize oily liquid within gas coming from within the evaporator, and; A pump for pumping oily liquid from the evaporator through the atomizing nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of retrofitting a refrigeration chiller having a compressor, condenser, and an evaporator all connected in series which comprises:
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Adding an atomizing nozzle to a discharge point in the path of vapors passing from the evaporator to the suction inlet of the compressor; and Adding a pump with its inlet connected to the evaporator at a location that can supply oily liquid, and adding its outlet to the atomizing nozzle. - View Dependent Claims (11)
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12. A system for circulating compressor lubricant from the evaporator of a refrigeration chiller comprising:
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A condenser; An evaporator coupled to the condenser, the evaporator containing a liquid refrigerant phase and an oily liquid having a higher concentration of oil than the liquid refrigerant phase; A compressor, having a suction inlet, the compressor coupled to the evaporator and the condenser; A first pump for pumping oily liquid from the evaporator to a discharge near the suction inlet; and A second pump for pumping oily liquid from the evaporator to a discharge near the suction inlet. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. The method of installing an auxiliary system for circulating compressor lubricant from the evaporator to the compressor of a refrigeration chiller that already has a first pump for circulating lubricant the steps comprising:
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Obtaining a second pump having an inlet and an outlet; Coupling the second pump outlet to the compressor suction inlet; and Coupling the second pump inlet to the evaporator. - View Dependent Claims (27, 28)
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Specification