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7584624 |
Apparatus for preventing liquid refrigerant accumulation of air conditioner and method thereof
Disclosed is an apparatus and method for preventing liquid refrigerant accumulation in an accumulator of an outdoor unit of an air conditioner. The method includes the steps of: determining a state...
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7533536 |
Method and apparatus for measuring and improving efficiency in refrigeration systems
An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system; means for altering a process...
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7467521 |
Method for controlling multi-type air conditioner
The present invention relates to a method for controlling an air conditioner, in which operation time periods of an outdoor unit is integrated, to determined a time point when an oil recovery...
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7272953 |
Method and apparatus for separating and neutralizing ammonia
The present invention is a method and apparatus to provide for the safe and effective removal and neutralization of ammonia from a stream of waste oil or other liquid. The apparatus consists of a...
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7249467 |
Gas-liquid separator for refrigerant cycle system
A gas-liquid separator (accumulator) is arranged at a refrigerant suction side of a compressor of a refrigerant cycle system mounted in a vehicle. The gas-liquid separator includes a gas-liquid...
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7225626 |
Thermal management of a gas turbine bearing compartment utilizing separate lubrication and cooling circuits
A multiple path fluid circuit comprising a fluid reservoir and a fluid pump having an inlet in fluid communication with the fluid reservoir. The fluid pump may have an outlet in fluid communication...
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7222491 |
Air conditioner and method for performing oil equalizing operation in the air conditioner
An air conditioner including an outdoor unit including a first compressor and a second compressor connected in parallel to the first compressor, an outdoor unit connected in parallel to the outdoor...
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7219503 |
Quick-change coalescent oil separator
A refrigeration system including a coalescent oil separator for removing oil from a refrigerant gas and oil mixture discharged from a compressor. Upon a pressure condition being exceeded a...
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7216494 |
Supermarket refrigeration system and associated methods
A supermarket refrigeration system may include a plurality of supermarket refrigeration cases, each including an evaporator and an associated compressor connected downstream therefrom. A common...
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7194337 |
Agent-based operation of a robotic device
A method for agent-based operation of a robotic device. In the method, at least one condition is detected in various locations of a room with a plurality of sensors. In a plurality of agents...
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7178347 |
Method for refrigerant and oil collecting operation and refrigerant and oil collection controller
A method for refrigerant and oil collecting operation capable of assuring the cleanliness of the inside of an existing communication pipe at a low cost and installing, at a low cost, a new air...
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7168264 |
Refrigerant cycling device
A refrigerant cycling device is provided, wherein a compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container. The first and the second...
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7104076 |
Lubricant return schemes for use in refrigerant cycle
A control algorithm is developed which takes corrective action in the event that system conditions indicate there may be an inadequate flow of lubricant in the system. In particular, if a discharge...
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7086238 |
Oil separator with bi-directional valve mechanism for use with a refrigerant recycling machine
An automotive air conditioning refrigerant recycling system incorporates an improved upstream oil separator that removes virtually all contaminating lubricants from a refrigerant stream before the...
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7082786 |
Scroll compressor and refrigerating system using ammonia group refrigerant
The scroll compressor includes a scroll compression mechanism portion in combination of an orbiting scroll and a fixed scroll, a frame for supporting the compression portion, a rotary shaft fitted...
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7082774 |
Compressor oil removal in ammonia refrigeration system
Automatic oil removal from an ammonia evaporator/low pressure vessel in a refrigeration system is disclosed. A liquid refrigerant level controller is utilized to drain the oil. The controller works...
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7051551 |
Compressor
A refrigerant cycling device is provided, wherein a compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container. The first and the second...
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7018558 |
Method of improving performance of refrigerant systems
A method of improving performance of refrigerant systems such as refrigerators and air conditioners that utilize a refrigerant working fluid. The working fluid consists essentially of a heat...
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6993920 |
Heater cycling for improved oil return
A method comprises the steps of (a) providing a refrigeration unit having a refrigerated or heated space and at least one measured operating parameter, (b) providing heat to the refrigerated space...
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6986259 |
Refrigerator
Disclosed is a refrigerating apparatus using a temperature sensitive expansion valve ( 46 ) as an expansion mechanism. In the refrigerating apparatus, a switching valve ( 7 a ) is disposed on the...
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6945073 |
Refrigerant cycling device and compressor using the same
A refrigerant cycling device is provided, wherein a compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container. The first and the second...
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6904759 |
Lubricant still and reservoir for refrigeration system
A lubricant still for use in a compressor for separating oil from refrigerant, includes a vessel having an inlet for incoming oil laden refrigerant, an outlet for gaseous refrigerant, and an outlet...
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6830099 |
Falling film evaporator having an improved two-phase distribution system
An improved two-phase refrigerant distributor for use in a falling film evaporator in a refrigeration chiller system defines apertures in its undersurface from which serrated collars depend. The...
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6810681 |
Method of draining and recharging hermetic compressor oil
A method of draining and recharging a hermetic compressor with oil using a drainage assembly mounted in the compressor housing. The assembly includes a tube having a valve mounted at one end...
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6755029 |
Ammonia separator and neutralizer
The present invention is a method and apparatus to provide for the safe and effective removal and neutralization of ammonia from a stream of waste oil or other liquid. The apparatus consists of a...
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6739147 |
Alternate flow of discharge gas to a vaporizer for a screw compressor
A system for reclaiming oil from a combined refrigerant/oil liquid mixture at an evaporator takes a tap of discharge pressure refrigerant from a screw compressor. This hot refrigerant is utilized...
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6675607 |
Swash plate type compressor
An oil separator is provided on a bleeding channel inside the shaft 16. By integral rotation of the shaft 16 and a rotary valve, oil contained in a refrigerant gas is centrifuged via the oil...
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6672100 |
Porous part for refrigerators, and method of producing the same and refrigerator
In this porous part producing method, a head part ( 11 A, 11 B) in the interior of a compressor, which is a sintered part, is subjected at least to vacuum substitution or heat blow cleaning,...
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6668564 |
Refrigeration cycle
A highly reliable refrigeration cycle having a residual refrigerant, which is designed that the refrigerating machine oil does not stagnate in the refrigeration cycle after flowing out from the...
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6651458 |
Internal intermediate pressure 2-stage compression type rotary compressor
An internal intermediate pressure type two-stage compression rotary compressor ( 10 ) is provided with an electrically driven element ( 14 ) disposed within a sealed vessel ( 12 ), and first and...
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6640559 |
Vertical oil separator for a chiller system
A device and method is provided for separating oil from an oil and gas mixture in a chiller system. The device includes a housing, an oil and gas inlet, a gas outlet, an oil outlet, a baffle, and a...
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6631617 |
Two stage hermetic carbon dioxide compressor
A two stage hermetic compressor which uses carbon dioxide as the working fluid. A pair of modules individually housing compression mechanisms are located at opposite ends of a module housing an...
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6622495 |
Ejector and refrigerating machine
An ejector that does not inhibit a flow of fluid and a refrigerating system provided with the ejector. The ejector includes a hollow passage, i.e. a negative pressure generating passage, through...
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6584783 |
Fluid transport
A conduit for transporting non-volatile liquids is provided in which the conduit's internal surfaces have a surface energy lower than that of the nonvolatile liquid.
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6565766 |
Environmentally safer replacement refrigerant for freon 12-based refrigeration systems
An apparatus and method wherein ozone layer-damaging dichlorodifluoromethane is substituted with a mix of less environmentally damaging refrigerants chlorodifluoroethane and tetrafluoroethane in...
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6564573 |
Concentrated ammonia aqueous solution tank used in absorption diffusion type refrigerating equipment
The present invention proposes a concentrated ammonia aqueous solution tank used in an absorption diffusion type refrigerating equipment. The present invention is characterized in that a capillary...
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6564560 |
Oil-free liquid chiller
A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which is itself mounted for rotation using rolling element bearings lubricated only by the...
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6557371 |
Apparatus and method for discharging fluid
An apparatus and associated method for discharging a fluid and a liquid separated from the fluid from an outlet chamber of a heat exchanger. The outlet chamber is configured to collect the...
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6551524 |
Polyol ester lubricants, especially those compatible with mineral oils, for refrigerating compressors operating at high temperatures
A high quality lubricant for compressors operated during at least part of their compression cycle at temperatures above normal human comfort temperatures, such as most automotive air conditioners,...
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6551523 |
Blended polyol ester lubricants for refrigerant heat transfer fluids
An ester blend, including an ester having neopentylglycol and a source of 2-ethylhexanoic acid as its reactive components and an ester having pentaerythritol and a source of 2-ethylhexanoic acid as...
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6550258 |
Pre-start bearing lubrication for refrigeration system compressor
At or just prior to shut-down, or at least prior to a significant pressure equalization in a refrigeration system, a vessel containing pressurized oil or a pressurized oil-rich oil-refrigerant...
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6526765 |
Pre-start bearing lubrication system employing an accumulator
Just before shutdown, or at least prior to a significant pressure equalization in a refrigeration system, an accumulator containing oil is isolated from the rest of the refrigeration system in such...
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6526764 |
Hydrofluorocarbon refrigerant compositions soluble in lubricating oil
Hydrofluorocarbon refrigerants are not soluble in hydrocarbon oil. Retrofitting refrigeration equipment with hydrofluorocarbons generally entails the use of expensive polyol ester (POE) lubricants....
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6513338 |
Refrigerant mixture for a mixture-throttling process
A refrigerant mixture for a mixture throttle process contains from 0.06 mol/mol to 0.20 mol/mol propane, from 0.26 mol/mol to 0.36 mol/mol nitrogen and from 0.20 mol/mol to 0.38 mol/mol methane,...
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6506027 |
Two stage compressor and a method for cooling such a compressor
A helical screw compressor is provided having a first compressor stage and a second compressor stage. The helical screw compressor includes a first male rotor and a first female rotor in the first...
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6484517 |
Compressor oil pressure control method and unit
The present invention relates to the art of refrigeration and more particularly to a method of regulating the cooling process by controlling the oil pressure in a compressor. The system prevents...
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6474405 |
Refrigeration utilized to cool driveline lubricants
A refrigerant fluid is placed within a driveline component, and in particular an axle housing. This refrigerant fluid is received within a sealed reservoir such that it is sealed from the typical...
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6357239 |
Oil return from chiller evaporator
Oil return from the evaporator to the compressor of a refrigeration chiller is accomplished by routing the suction piping that communicates between the chiller's evaporator and compressor to a...
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6341943 |
Blower
A blower supplies compressed air to a predetermined place. The blower is provided with a plurality of compressors, a common air tank for storing compressed air supplied from the compressors, a...
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6330811 |
Compression system for cryogenic refrigeration with multicomponent refrigerant
A system for generating refrigeration wherein a multicomponent refrigerant is compressed in a compressor lubricated with polyalphaolefin-based oil, the oil is removed from the compressed...
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