Abstract: A refrigerant handling system that includes a compressor having an inlet and an outlet, a condenser for withdrawing heat from and at least partially condensing refrigerant passing therethrough, and a compressor oil separator connected between the compressor outlet and the condenser for separating oil from refrigerant passing to the condenser. The compressor oil separator takes the form of a closed canister having an open internal volume, a vapor inlet and a vapor outlet at an upper portion of the canister, and an oil drain at a lower portion of the canister. A refrigerant coil is mounted externally of the canister in heat exchange relationship with the canister sidewall. The vapor inlet, vapor outlet and refrigerant coil are connected in series between the compressor outlet and the condenser coil such that heat of refrigerant passing through the coil heats the canister internal volume to prevent condensation of refrigerant therein.

Abstract: An internally compounded two-stage compressor has an interstage cooler and an oil separator associated therewith. The oil, and any hot gas mixed with it, discharged from the oil separator is passed in heat exchanger relationship with the cooling refrigerant flowing into the interstage cooler.

Abstract: A refrigerant reclaim system includes a compressor, a heat exchanger, an oil separator, a condenser, a chill tank, a filter-dryer and a cooling coil in the chill tank. Refrigerant to be reclaimed is drawn through the cold side of the heat exchanger, converted to a gas which is discharged into the oil separator where the gas is directed upwardly in an expanding stream. The flow of the stream is abruptly interrupted to separate oil from refrigerant. The gaseous refrigerant is passed from the oil separator through the compressor, the hot side of the heat exchanger, a condenser and into the chill tank in a liquid state. Liquid refrigerant flows from the bottom of the chill tank through a filter-dryer, an expansion device, converting it to gas, through a cooling coil, submerged in liquid refrigerant in the chill tank, into the stream exiting the oil separator and back to the compressor.

Abstract: An adsorption cooler operating in accordance with the periodical adsorption principle and consisting of at least one adsorption container filled with zeolite. At least one condenser with a collecting container for the water which desorbs from the zeolite and an insulated cooling container which may be closed by a shut-off member are serially connected with the adsorption container. In the cooling container, the adsorption cooler generates ice in stages which acts as a cold buffer. The system is usable for example in solar cooling systems, vehicle air conditioning units and air conditioning insulation as well as beverage coolers.

Abstract: A unique multi-stage refrigeration system for multiple product-display cases in which each display case has a low-stage booster compressor disposed therein. Each booster compressor compresses refrigerant received from the evaporator in its display case and feeds same to a bank of high-stage compressors disposed in a remotely located equipment room. A mechanical sub-cooler is provided for controlling liquid refrigerant temperature, and an improved lubrication system is provided for balancing the distribution of lubricant throughout the system. Several modifications of the system are also shown.

Abstract: Device for oil cooling forming part of a mixture of compressed gas and oil from a compressor and directed to separator in a compression unit comprising an evaporator connected to said compressor, said separator being connected both to a condenser, in turn connected to said evaporator, and to said compressor by a conduit for oil supply to the compressor, characterized in that said conduit is connected by a line comprising an ejector to the conduit connecting the compressor to the separator, means being provided connecting the tank of the refrigerating fluid from the condenser to said ejector, so that a portion of oil from the separator passes through said ejector where vacuum is built up drawing a portion of the refrigerating fluid which is accordingly mixed with said mixture of compressed gas and oil to suitably cool down the oil forming part of said mixture.

Abstract: A heat pump having improved compressor lubrication wherein an adequate amount of refrigerator oil is returned to the compressor at all times and the circulation time for the refrigerator oil is reduced. An oil separator is connected between a discharge side of the compressor and a four-way valve of the heat pump system. A bypass is connected between the oil separator and the accumulator. The bypass is provided with an electromagnetic valve for selectively opening and closing the bypass. A control device periodically opens the electromagnetic valve during the operation of the compressor to provide for supply of refrigerator oil to the compressor from the oil separator.

Abstract: A low pressure gaseous hydrocarbon fuel storage system and power plant is described which generally comprises on-board means for storing a self-contained supply of a gaseous hydrocarbon fuel, a prime mover, means for conveying the gaseous hydrocarbon fuel to and from the storing means, and means for controlling the flow of the gaseous hydrocarbon fuel from the storing means to the prime mover. The on-board storing means, which may include one or more vessels or cylinders, contains a predetermined sorbent material for reducing the pressure at which the gaseous hydrocarbon fuel is stored. The conveying means is adapted to convey the gaseous hydrocarbon fuel to the on-board storing means from a stationary source of the gaseous hydrocarbon fuel, and also to convey the gaseous hydrocarbon fuel from the storing means to the combining means of the prime mover during the operation of the vehicle.

Abstract: Where a helical screw compressor gas or vapor working fluid is not too soluble in the compressor lubricant for compression process cooling, such lubricant after separation from the working fluid and cooled to as a low a temperature as possible and operating at as high a pressure as possible, is fed to an atomizing nozzle and injected into the inlet end of the compressor. This produces a cloud type blanket of cool atomized droplets uniformly dispersed within the suction vapor or gas allowing the highest possible rate of heat transfer to occur during the compression process and achieving the highest possible isothermal efficiency in a gas compression system or operation near vapor saturation values in a refrigeration vapor compression system while avoiding large hydraulic losses in the compressor. Working fluids such as helium, air, and ammonia may provide extremely high superheated gas or vapor at the compressor inlet.

Abstract: In a refrigeration system comprising a compressor, an oil separator, a condenser, an expansion valve, an evaporator, etc., a groove for oil separation is provided along inner wall of a refrigerant gas supply pipe which connects the oil separator and the compressor, and an oil reservoir is provided at the bottom of the oil separator.

Abstract: A compressor that uses an excess of lubricant for sealing and cooling is driven by a natural gas engine and pumps natural gas to a transmission outlet, the lubricant drawing off moisture from the gas and portion then being pumped through a circuit in which moisture is removed after which the lubricant is returned to the compressor.

Abstract: In a heat pump with a circulation system for a refrigerant, including a compressor, a condensor, a choke member, and an evaporator, there is provided a receiver arranged as a jacket heat exchanger with a vessel connected in series between the outlet of the condensor and the choke member, and an outside jacket surrounding the vessel, connected in the return passage from the evaporator to the compressor as a liquid separator with the inlet of the return passage connected to the jacket at the bottom thereof and with the outlet of the return passage connected to the jacket at the top thereof.

Abstract: A method and apparatus for removing oil from the refrigerant in a vapor compression refrigeration system comprising a compressor, a condenser, an evaporator, and a vertical oil separation and heat exchange column into which hot compressed refrigerant vapors containing entrained oil are introduced to flow upwardly countercurrently with cool refrigerant liquid introduced to flow downwardly in direct intimate mutual contact, said column comprising (1) an inlet vapor distributor to disperse vapors throughout the cross section of the column to flow upwardly around baffles and to be removed in the top of the column and be directed to said condenser, (2) an inlet liquid line comprising an hydraulic leg wherein the liquid is of sufficient pressure to resist the pressure of said vapors, (3) a means for distributing said liquid throughout the cross section of said column to fall by gravity to a pool of liquid in the bottom of the column, (4) an outlet from said pool of liquid directed to said evaporator and (5) an outl

Abstract: A refrigeration system employing oil lubricated compressors has an improved arrangement for removing oil contaminations from the hot gas contaminated with oil from the compressor. This is done by desuperheating the hot refrigerant gas with indirect contact cooling by flashing liquid at the condenser pressure, heating or evaporating water and heating air, and is applicable to all evaporative refrigerants: miscible and immiscible with lubricating oil.In addition, improved features for better contact of liquid and hot gas in present equipment by reducing density, improved inlet connection for receivers now in operation to minimize agitation, improved rapid defrosting by condensing clean gas with clean condensate remaining in the evaporator for chilling as the pressure is reduced, new non-entrainment trap for collecting non-condensible gases, and new application with siphonic tee utilizing high velocity gas from the compressor for drawing in gas at equalized pressure to be returned to the condenser.

Abstract: A positive displacement compressor, such as a helical screw rotary compressor without capacity control element, is coupled in a refrigeration loop main line between the evaporator and an oil separator and upstream of the condensor. To unload the screw compressor at low evaporator load, any refrigerant discharging from the compressor is bypassed by a line connecting the suction and discharge sides of the screw compressor, and main line connection from the evaporator to the screw compressor is shut off such that the driven, unloaded screw compressor pulls oil from the separator through a restrictor and oil injection port and some refrigerant vapor which passes to the evaporator side through the screw compressor bypass line. As the evaporator pressure increases, the evaporator is connected through a restrictor within the main line to the screw compressor suction.

Abstract: Vehicle air-conditioning and other refrigerator systems utilizing specified helical screw compressors and operated under specified conditions and using specified refrigerants and oils. Also disclosed are improved hydrocarbon compressor systems which also utilize specified helical screw compressors and are operated under specified conditions using specified oils selected in relation to the hydrocarbon being compressed.

Abstract: A method of prevention of overheating of an electric motor for a compressor comprising the steps of introducing into the case of the electric motor of the closed type for driving the screw compressor part of the refrigerant which is introduced into an evaporator so as to cause said part of the refrigerant to expand directly therein, and permitting the expanded gas which has absorbed heat to be drawn by suction into a screw blade groove space of the screw compressor in a position in which the screw blades of the screw compressor is meshing engagement with one another have sealed gas.

Abstract: A refrigeration plant including an oil-injected compressor, an oil separator, a condenser and an evaporator. The plant comprises means to introduce liquid refrigerant to the compression phase of the cycle ahead of the oil separator. The plant further comprises means to adjust the amount of liquid refrigerant introduced in response to the temperature difference between the condenser and the oil separator, in order to keep the difference on a constant level of 5.degree. C. to 15.degree. C.