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WO/2000/063559A1 |
In a hermetic compressor using a hydrocarbon coolant and a mineral oil lubricant, the decrease in the viscosity of the mineral oil lubricant for the purpose of operation with high efficiency results in poor lubricity and the lowering of ...
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WO/2000/060021A1 |
In a refrigerant compression type refrigerating system for use in the field of refrigerating/air conditioning employing a hydrocarbon refrigerant containing an odorant, the concentration of the odorant at the time of refrigerant leakage ...
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WO/2000/055506A1 |
The present invention provides a two-stage centrifugal compressor. The compressor of this invention has a simplified refrigerant passage structure and effectively cools its electric motor in addition to bearing parts using an existing re...
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WO/2000/050826A1 |
The invention relates to a compression cooling system of a motor vehicle air conditioning system comprising a compressor (6) which is driven by an electric motor (5) provided with a motor control device (12). The inventive cooling system...
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WO/2000/046557A1 |
The refrigeration system (10) includes a compressor-pump unit and a liquid pump (21) between a condenser (18) and an expansion device (12) which improves efficiency of the refrigeration system by increasing the pressure of, thus subcooli...
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WO/2000/023752A1 |
A refrigerating cycle wherein the pressure of a high pressure line (8) is lowered when the pressure is abnormally high by transmitting the high pressure to the low pressure line (9) without releasing the coolant to the atmosphere, and th...
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WO/2000/022358A1 |
An enhanced motor cooling and lubrication system for a liquid chiller (10) includes a liquid refrigerant cooled compressor drive motor (46), wherein the refrigerant used to cool the drive motor is returned to the chiller's condenser (14)...
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WO/2000/022359A1 |
A refrigeration chiller (10) employs a centrifugal compressor (12) the impellers (42, 44) of which are mounted on a shaft (48) which it itself mounted for rotation using rolling element (53) bearings (52) lubricated only by the refrigera...
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WO/2000/019157A1 |
A high-temperature refrigerating circuit (20) and a first low-temperature refrigerating circuit have their refrigerant circulation direction made reversible. The receiver (25) of the high-temperature refrigerating circuit (20) comprises ...
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WO/2000/017586A1 |
A refrigeration apparatus (10) contains an oil sump (30) which houses an oil reservoir (32) defined by a wall (40). The apparatus (10) also contains at least one oil sump heater (36, 37) in thermal contact with the wall (40). The heater ...
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WO/1999/061847A1 |
Hermetic refrigeration compressor, in particular for household refrigeration appliances, comprising control and connection means, such as a motor overload cutout (13) provided with a protective support (14), an electric motor starter (16...
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WO/1999/058905A1 |
The invention relates to a method for producing cold in the temperature range between 65 and 150 degrees Kelvin. The invention also relates to a device which comprises an oil-lubricated compressor (1) for compressing a coolant, a seconda...
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WO/1999/024767A1 |
A single motor (26) drives both oil and refrigerant pumps (24, 36) in a refrigeration chiller (20), the motor (26) and oil pump (24) being disposed in the chiller's oil supply tank (28) and the refrigerant pump being disposed exterior th...
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WO/1999/020718A1 |
PAG having a viscosity of not more than 70 cST (40 °C) is added in an amount of 0.1 to 20 % by weight (preferably 2 to 10 % by weight) to a synthetic lubricating oil such as PVE or ester oil to prepare a lubricating agent having good co...
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WO/1999/014511A1 |
A sliding member used for various purposes, or a slide bush, an Oldham's ring and a vane used for various types of refrigerating compressors, which comprise an iron material, rarely encounter the adhesion thereof with an aluminum member ...
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WO/1999/013225A1 |
A protection system for a compressor. The system comprises a compressor having a discharge and including at least one rotor and at least one bearing; a lubrication system including at least one oil recovery device for recovering oil from...
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WO/1999/013299A2 |
A sensor system. The system comprises a binary sensor issuing a signal representative of a first or second condition; sampling circuitry, operatively connected to the binary sensor, for monitoring the number of transitions between the fi...
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WO/1999/000600A1 |
The invention relates to a refrigerant compressor comprising a motor unit (20) which has a motor and a cooling duct (36), running from an external cooling duct connection for the motor. The refrigerant compressor also has a compressor un...
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WO/1998/057104A1 |
The existence of inverted start conditions in a refrigeration chiller (10) is identified by sensing the liquid level (64, 68) in the chiller evaporator (20). That liquid level (64, 68) is indicative of the location of the chiller's refri...
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WO/1998/053204A1 |
An enclosed compressor which has one or more pores (17) made in the shell of a suction muffler (16) made from a material having a low heat conductivity, such as synthetic resin, and communicating with the inside of an enclosed case (1). ...
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WO/1998/036229A1 |
A refrigeration system (10) employing a screw compressor (12) and a falling film evaporator (20) makes use of high-side pressure to drive lubricant, which escapes the compressor (12) and collects as a lubricant-rich mixture of lubricant ...
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WO/1998/012109A1 |
The present invention relates to a method and apparatus for charging a closed, pressurizable fluid system (40) with an appropriate fluid (44), comprising a) (16) connecting to the system (44) a closed, unpressurized container (42) contai...
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WO/1998/012468A1 |
A method and device is disclosed for removing residual oil and other contaminants from the refrigerant stream flowing to low-temperature stages of a cryogenic refrigerator. A stream of vapor and liquid refrigerant is injected into a cycl...
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WO/1998/010854A1 |
An improved oil filter unit (5) for attachment to a bight portion of a 'J' tube of an accumulator dehydrator includes a rigid, preferably metal pick-up tube or projection (10). The rigid projection prevents collapse of an extension (24) ...
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WO/1997/043585A1 |
A primary compressor (12) and a booster compressor (10) connected in series are presented. A first conduit (14) connects the low side of a heating/cooling or refrigeration system to the inlet (18) of the booster compressor (10), the outl...
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WO/1997/039292A1 |
The 8 kW refrigerating system comprises a condenser, evaporator and two-stage centrifugal compressor assembly with an electric motor provided with a cooling system. The condenser inlet is connected to the compressor assembly outlet, whil...
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WO/1997/039291A1 |
The refrigerating system comprises a condenser, evaporator and two-stage centrifugal compressor assembly with an electric motor provided with a cooling system. The condenser inlet is connected to the compressor assembly outlet, while the...
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WO/1997/024415A1 |
The present invention provides a refrigerating machine oil which permits ready removal of sludge generated in a refrigerant circuit and is easy to return to a compressor, and a refrigerator using the oil. A refrigerating machine oil comp...
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WO/1997/020177A1 |
A refrigeration system (14) which has in a closed loop a compressor body (79), with a cooling jacket (11), for compressing a refrigerant, a condenser (28) for condensing the compressed refrigerant to a liquid refrigerant, and a condensed...
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WO/1997/008502A1 |
An alcohol, specifically ethanol, methanol and isopropanol, is used to remove acid from a refrigeration system, a heat pump or an air conditioner. The alcohol vaporizes acid, primarily inorganic acid, in the system and, in the filter/dry...
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WO/1997/002729A1 |
The invention concerns a hermetic cooling compressor with an electric motor having a variable speed controlled by a converter cooled by a cooling medium flow. Compressor and converter are forming a built together unit, in which a medium ...
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WO/1996/041106A1 |
The invention provides a refrigeration system which includes in a closed loop connection a compressor (14) for compressing a refrigerant, a compressor cylinder head cooling system utilizing liquid refrigerant (46) discharged into the com...
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WO/1996/039601A1 |
An apparatus and method determines and controls the oil level in one or more refrigeration system compressors (14, 18). The invention returns lubricating oil to the compressors to maintain oil levels sufficient for proper lubrication of ...
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WO/1996/037741A1 |
Compression refrigeration apparatus (1) for removing heat from a heat load using a falling film evaporator (8), operated with an azeotropic refrigerant and utilizing a vapor-liquid separator (35), preferably inside the evaporator vessel ...
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WO/1996/031937A1 |
A compressor (10; 100; 200; 300; 500) with a build-in reciprocating motor, comprises a cylindrical housing (20; 120; 210; 510) with two ends thereof fitted with tow opposing electromagnets (30; 130; 230; 530), each has a circular inner p...
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WO/1996/031569A1 |
A gasket which is used in a compressor of, for example, a refrigerator using a refrigerant based on a fluorocarbon and refrigerator oil selected from among synthetic lubricating oils based on polyalkylene glycol (PAG), modified PAG prepa...
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WO/1996/030695A1 |
A method and device is disclosed for removing residual oil and other contaminants from the refrigerant stream flowing to low-temperature stages of a cryogenic refrigerator. A stream of vapor and liquid refrigerant coming from an air-cool...
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WO/1996/028700A1 |
When a lock detecting means (17) detects a locked state of a DC motor (4) in a starting stage, a torque increasing means (18, 27, 29 or 31) immediately selects a starting sequence pattern of an output torque that is greater by one step, ...
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WO/1996/026368A1 |
The position of a slide valve in a screw compressor in a refrigeration system is controlled using a gaseous medium sourced from the higher pressure of two or more sources of such fluid. Preferred sources are refrigerant gas in a closed c...
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WO/1996/021802A1 |
An oil level regulator (46) is provided for controlling the oil level in the crankcase (19) of one or more refrigeration compressors (12) or the like. The regulator (46) has a closed chamber (58) for controlling the oil. A float controll...
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WO/1996/000873A1 |
A refrigerator provided with a compression mechanism (21), an outdoor heat exchanger (24), an outdoor electric expansion valve (25) and an indoor heat exchanger (32), wherein the compression mechanism (21) is formed by connecting two com...
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WO/1996/000872A1 |
Two outdoor units (2A, 2B) and three indoor units (3A, 3B, 3C) are connected to a main liquid line (7L) and a main gas line (7G) in series and parallel, respectively. Lubricant balancing mechanisms (9A, 9B) are provided on the respective...
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WO/1995/035462A1 |
An apparatus (38) is disclosed for controlling the level of oil in one or more compressors (10) of a refrigeration system. The compressors (10) are supplied with oil from a reservoir (28) which is in fluid communication via a common cond...
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WO/1995/013334A1 |
A mixed gas refrigerant for use in the cryogenic range of temperatures between 80 �K and 100 �K, with single stage compressor (10) providing high pressures up to 30 Atms. The refrigerant consists of nitrogen between 30 and 50 molar p...
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WO/1995/012649A1 |
A lubricant composition intended for use in a refrigeration system having at least one compressor and employing a halocarbon working fluid such as R134a, comprises a synthetic polyol ester lubricant and a siloxane in an amount sufficient...
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WO/1994/027099A1 |
A closed cycle refrigerating system for cryogenic temperatures using a single stage compressor (12) with a refrigerant comprising a gas mixture. The refrigerating system includes a heat exchanger (28) having a throttling orifice (34) whi...
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WO/1994/027100A1 |
Method of replacement of at least one CFC lubricant compatible with chlorofluorocarbon-containing cooling fluids, by at least one HFC lubricant compatible with hydrofluorocarbon-containing cooling fluids, before the replacement of the CF...
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WO/1994/024497A1 |
A method and apparatus for controlling refrigerant gas pressure in a low pressure refrigeration system including a warm surface (24) within a container (20). Liquid refrigerant is removed from the refrigeration system evaporator (10) and...
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WO/1994/023252A1 |
Compressor lubricant in a screw compressor-based refrigeration system is cooled by directing the lubricant from the system oil separator (14) to an oil-cooling heat exchanger (46) disposed in the lower portion of the system condenser (16...
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WO/1994/017348A1 |
An arrangement for removing from a refrigerating system or heat pump system a lubricating oil used together with a first type of refrigerant in the system and replacing this oil with an oil which is compatible with a second type of refri...
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