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Title: Oil collection/recirculation for vapor-compression refrigeration system

Abstract

This patent describes a vapor-compression refrigeration system: an oil lubricated compressor, a condenser and an evaporator interconnected by conduit means to form a closed circuit for circulation of a refrigerant fluid; at least part of the conduit means comprising a refrigerant vapor return conduit for conducting refrigerant vapor from the evaporator to the compressor, the compressor being disposed at a vertical elevation above the evaporator; reservoir means in fluid flow communication with the refrigerant vapor return conduit for collecting oil separated from the refrigerant fluid; means for pumping oil from the reservoir means to the compressor through a separate oil return conduit; a fluid operated motor adapted to be driven by refrigerant fluid from the refrigeration system, the motor driving the pumping means; and control means, including first liquid level sensing means, for sensing a predetermined accumulation of oil in the reservoir means and causing the pumping means to be energized to pump oil from the reservoir means to the compressor; the first liquid level sensing means including switch means interposed in a control circuit and operable to cause the control circuit to energize the pumping means; the control circuit adapted to open and close a refrigerant flow control valvemore » for controlling the flow of refrigerant fluid through the fluid operated motor. The control circuit further is operable to energize and deenergize the motor to prevent more than a predetermined quantity of oil from accumulating in the reservoir means.« less

Inventors:
; ;
Publication Date:
OSTI Identifier:
7226583
Patent Number(s):
US 4625523
Assignee:
NOV; NOV-85-036526; EDB-87-014703
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 25 Jan 1985
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; REFRIGERATING MACHINERY; LUBRICATING OILS; VAPOR COMPRESSION REFRIGERATION CYCLE; CIRCULATING SYSTEMS; COMPRESSORS; EVAPORATORS; GAS COMPRESSORS; LEVEL INDICATORS; MOTORS; PUMPING; PUMPS; REFRIGERANTS; VALVES; CONTROL EQUIPMENT; EQUIPMENT; FLOW REGULATORS; FLUIDS; LUBRICANTS; MACHINERY; MEASURING INSTRUMENTS; OILS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; PETROLEUM PRODUCTS; WORKING FLUIDS; 320100* - Energy Conservation, Consumption, & Utilization- Buildings

Citation Formats

Toub, S G, Gilliland, Jr, J L, and Holder, H W. Oil collection/recirculation for vapor-compression refrigeration system. United States: N. p., 1986. Web.
Toub, S G, Gilliland, Jr, J L, & Holder, H W. Oil collection/recirculation for vapor-compression refrigeration system. United States.
Toub, S G, Gilliland, Jr, J L, and Holder, H W. Tue . "Oil collection/recirculation for vapor-compression refrigeration system". United States.
@article{osti_7226583,
title = {Oil collection/recirculation for vapor-compression refrigeration system},
author = {Toub, S G and Gilliland, Jr, J L and Holder, H W},
abstractNote = {This patent describes a vapor-compression refrigeration system: an oil lubricated compressor, a condenser and an evaporator interconnected by conduit means to form a closed circuit for circulation of a refrigerant fluid; at least part of the conduit means comprising a refrigerant vapor return conduit for conducting refrigerant vapor from the evaporator to the compressor, the compressor being disposed at a vertical elevation above the evaporator; reservoir means in fluid flow communication with the refrigerant vapor return conduit for collecting oil separated from the refrigerant fluid; means for pumping oil from the reservoir means to the compressor through a separate oil return conduit; a fluid operated motor adapted to be driven by refrigerant fluid from the refrigeration system, the motor driving the pumping means; and control means, including first liquid level sensing means, for sensing a predetermined accumulation of oil in the reservoir means and causing the pumping means to be energized to pump oil from the reservoir means to the compressor; the first liquid level sensing means including switch means interposed in a control circuit and operable to cause the control circuit to energize the pumping means; the control circuit adapted to open and close a refrigerant flow control valve for controlling the flow of refrigerant fluid through the fluid operated motor. The control circuit further is operable to energize and deenergize the motor to prevent more than a predetermined quantity of oil from accumulating in the reservoir means.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {12}
}