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| Number | Title | Issue Date |
| 7845190 | Transcritical refrigeration cycle A transcritical vapour compression refrigeration apparatus including: a compressor, a gas cooler, an economiser, an evaporator and a refrigerant; the refrigerant being compressed in the compressor, heat being rejected from the compressed refrigerant at supercritical... | 12/07/2010 |
| 7318470 | Device for exchanging heat The invention relates to a device for exchanging heat, particularly for use in motor vehicle air-conditioning systems, comprising at least one coolant, at least one coolant inlet (3), and at least one coolant outlet (4), which lead into at least one he... | 01/15/2008 |
| 7287399 | Collector for the liquid phase of the working medium of an air-conditioning system A collector for a liquid phase of a working medium of an air-conditioning system has a one-piece collecting container with a solid upper end wall and thickened base region for coupling blocks of a high-pressure piping system and a device for emergency emptying. Flow... | 10/30/2007 |
| 7086240 | 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 variable of the refrigeration system during efficiency measurement: and ... | 08/08/2006 |
| 7069740 | Accumulator and air conditioning system using the same An improved accumulator is disclosed, which includes a body having an empty space therein; an inlet tube inserted into the inside of the body from a top thereof, downwardly, for an inflow of a refrigerant to the inside of the body; an outlet tube inserted into the i... | 07/04/2006 |
| 7059143 | 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 variable of the refrigeration system during efficiency measurement; and ... | 06/13/2006 |
| 7052626 | Fluid compositions containing refrigeration oils and chlorine-free fluorocarbon refrigerants A fluid composition for a refrigerator, which comprises a chlorine-free fluorocarbon refrigerant and a refrigerator oil, said refrigerator oil consisting essentially of a tetraester of pentaerythritol of formula (1) | 05/30/2006 |
| 7021069 | Multiple refrigerating device A multi-type refrigerator is capable of achieving a high coefficient of performance (COP) while using R32 as refrigerant and that takes account of energy saving and global warming. Refrigerating cycles are executed by circulation of R32 as refrigerant through a refr... | 04/04/2006 |
| 7018961 | Refrigerating machine oil composition for carbon dioxide refrigerant The invention relates to a refrigerator oil composition for compression refrigerators with carbon dioxide refrigerant therein, such as car air conditioners, refrigerators, freezers, air conditioners, heat pumps, etc. The base oil of the composition comprises an oxyg... | 03/28/2006 |
| 7003980 | Refrigerating device An energy-saving type refrigerating device capable of preventing global warming, allowing a communication pipe diameter to be reduced and the number of types of the communication pipe diameters to be reduced while a COP of over the COP obtained when R22 is used is p... | 02/28/2006 |
| 6998065 | Fluid compositions containing refrigerator oils and chlorine-free fluorocarbon refrigerants A refrigerator oil for use in compressors using therein a hydrogen-containing halogenocarbon as a refrigerant, consisting essentially of as a base oil at least one kind of an ester selected from the group consisting of a specific pentaerythritol ester such as an est... | 02/14/2006 |
| 6951115 | Refrigerant composition and refrigerating circuit using the same The development of an alternate refrigerant composition which is free from a possibility of causing depletion of the ozone layer and capable of maintaining the performance of a conventional refrigerating circuit without modifying the circuit is desired. An object of... | 10/04/2005 |
| 6915658 | Accumulator and air conditioning system using the same An accumulator having a heater therein and an air conditioning system using the same is disclosed, in which the accumulator includes a body having an empty space therein; an inlet tube inserted into the inside of the body through a predetermined external point, for ... | 07/12/2005 |
| 6880361 | Refrigerating device An energy-saving refrigerating device is capable of preventing global warming, allowing a communication pipe diameter to be reduced and the number of types of the communication pipe diameters to be reduced while a COP of over the COP obtained when R22 is used is pro... | 04/19/2005 |
| 6840058 | Refrigerating cycle apparatus and method To provide a refrigerating cycle apparatus which uses carbon dioxide as a working medium, in which a problem associated with reliability arisen from introduction of water into a refrigeration cycle has been solved. Carbonic acid produced by a reaction of carb... | 01/11/2005 |
| 6792773 | Collector for the liquid phase of a working medium of an air conditioning system A collector for the liquid phase of the working medium of an air conditioning system has first and second connecting pipes provided for connection into the circuit of an air conditioning system. One of the connecting pipes continues in a guide tube which is guided t... | 09/21/2004 |
| 6701744 | Motor-driven needle valve for refrigerating circuit and refrigerating device with the motor-driven needle valve Formed in a valve main body (1) is a refrigerant flow path (41) for lowering the amount of flow of a refrigerant which flows into an internal space (30) of a casing (3) from a refrigerant flow path (9) through a needle fit/insert clearance (17) defined be... | 03/09/2004 |
| 6698214 | Method of refrigeration with enhanced cooling capacity and efficiency This invention relates to a refrigeration method and processes that employ a nontoxic and environmentally benign, oil-free refrigerant in a novel vapor-compression thermodynamic cycle that includes a means for enhancing cooling capacity and efficiency. A ... | 03/02/2004 |
| 6672084 | Energy saving refrigeration system using composition control with mixed refrigerants An energy-saving refrigeration system circulates a mixture of R-134a, R-32 and R-125 whose composition is controlled using a vapor separator. A vortex generator is a preferred means to separate the mixture. For high thermal load operation, R-32 stays in t... | 01/06/2004 |
| 6666046 | Dual section refrigeration system A refrigeration system particularly useful with a multicomponent refrigerant fluid wherein the refrigerant fluid is cooled in an upward leg of a first vertically oriented heat exchanger section and further cooled in a downward leg of a second vertically o... | 12/23/2003 |
| 6662588 | Modular liquid-cooled air conditioning system A liquid-cooled or air-cooled air conditioning system for corrosive industrial environments is disclosed. The system includes a corrosion-resistant lower or upper cooling module releasably connected to an external source of cool liquid or air and power, a... | 12/16/2003 |
| 6644064 | Refrigerant and refrigerating device An object of the present invention is to provide a refrigerant in which an odorant is added, the odorant being compatible with refrigerants and refrigerating device oils, and having no reactivity with refrigerating device oils and materials forming refrig... | 11/11/2003 |
| 6637236 | Refrigerating device A refrigerating device circulating R32 in a refrigerant circuit as a refrigerant to perform a refrigerating cycle, the refrigerating device comprising a compressor in the refrigerant circuit, a first heat exchanger serving as a condenser, an expansion mea... | 10/28/2003 |
| 6631625 | Non-HCFC refrigerant mixture for an ultra-low temperature refrigeration system Methods and apparatus for a refrigeration heat exchanger section useful in circulating a substantially non-HCFC refrigerant mixture which comprises: a compressor means, an auxiliary condenser, a first condenser, a second condenser, a third condenser, a su... | 10/14/2003 |
| 6622518 | Cryogenic refrigerating system The present invention provides a cryogenic refrigerating system for achieving ultra low temperature by sequentially obtaining low temperature through repetition of expansion and evaporation of a mixed-refrigerant in multiple stages. The refrigerating syst... | 09/23/2003 |
| 6619066 | Heat pump system of combination of ammonia cycle carbon dioxide cycle A heat pump system for cooling (refrigeration) or heating is provided by employing a combination of natural media such as ammonia and CO2. The heat pump system (1) combines an ammonia cycle (2) and a CO2 cycle (3), and the CO2 | 09/16/2003 |
| 6581404 | Refrigerant An object of the present invention is to provide a refrigerant in which an odorant is added, the odorant being compatible with refrigerants and refrigerating device oils, and having no reactivity with refrigerating device oils and materials forming refrig... | 06/24/2003 |
| 6576153 | Hydrofluorocarbon refrigerants for use in centrifugal chillers This invention relates to hydrofluorocarbons useful in refrigeration and heat pump applications. The invention provides hydrofluorocarbons selected from the group of 1,1,2,3,3-pentafluoropropane, 1,1,1,3,3-pentafluoropropane, 1,1,1,2,3-pentafluoropropane,... | 06/10/2003 |
| 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 dichlorodifluoromethane-based air-cooling systems. While les... | 05/20/2003 |
| 6560981 | Mixed refrigerant temperature control using a pressure regulating valve A standard refrigeration pressure regulating valve limits the minimum temperature produced by a refrigeration process, which uses a refrigerant mixture including at least two components whose normal boiling points differ by at least 50C. Limiting the lowe... | 05/13/2003 |
| 6548457 | Lubricant for refrigerating machine employing ammonia refrigerant The present invention provides a lubricant for a compression type refrigeration system using ammonia as a refrigerant, which comprises polyether compounds and aromatic amine compounds or phenothiazine compounds, and preferably further comprises alcohol co... | 04/15/2003 |
| 6516629 | Refrigeration cycle In order to magnify capacity control of a refrigeration cycle for an increased efficiency and achievement of compactness, the refrigeration cycle includes a compressor, a four-way valve, a heat exchanger on a side of a heat source, a liquid receiver, a he... | 02/11/2003 |
| 6467304 | Refrigeration cycle In order to magnify capacity control of a refrigeration cycle for an increased efficiency and achievement of compactness, the refrigeration cycle includes a compressor, a four-way valve, a heat exchanger on a side of a heat source, a liquid receiver, a he... | 10/22/2002 |
| 6454960 | Refrigerator using a polyvinyl ether refrigerator oil An object of the present invention is to obtain a good refrigerator using polyvinyl ether oil as a refrigerator oil, which is compatible with a hydrofluorocarbon type refrigerant not containing chlorine (such as R134a) without suffering conventional probl... | 09/24/2002 |
| 6438990 | Refrigeration system The present invention discloses a self-contained recirculating refrigeration system wherein the refrigerant is referred to as HTF (heat transfer fluid) which is cooled using liquid nitrogen. HTF remains in the liquid phase throughout the process of the pr... | 08/27/2002 |
| 6434959 | Air conditioner In an air conditioner including a compressor, a four-way valve, an outdoor heat exchanger, a pressure-reducing mechanism, an indoor heat exchanger and an accumulator which are successively connected to one another to construct a loop-like refrigerant circ... | 08/20/2002 |
| 6427453 | Vapor-compression evaporative air conditioning systems and components Novel vapor compression evaporative cooling systems which use water as a refrigerant are provided, as are methods for using same. Also provided are novel compressors, compressor components, and means for removing noncondensibles useful in such cooling sys... | 08/06/2002 |
| 6403540 | Chemical composition for cleaning an automotive air conditioning system and method for operating and cleaning A composition for cleaning and lubricating automotive air conditioners contains a polyol ester lubricant, an antiwear and extreme pressure additive, and a solvent mixture of tetrafluoroethane and 2,3-dihydroperfluoropentane. An automotive air conditioning... | 06/11/2002 |
| 6374629 | Lubricant refrigerant composition for hydrofluorocarbon (HFC) refrigerants A lubricant-refrigerant composition contained within a compression refrigeration system is disclosed which comprises (A) at least one fluorine-containing hydrocarbon refrigerant containing 1 to 3 carbon atoms, further wherein fluorine is the only halogen in sa... | 04/23/2002 |
| 6363741 | Refrigerant composition and refrigerating apparatus A refrigerant composition comprising difluoromethane (R-32), pentafluoroethane (R-125), 1,1,1,2-tetrafluoroethane (R-134a), and n-pentane, preferably prepared by mixing n-pentane preliminarily in R-134a, and mixing into a refrigerant of R-32 and R-125, wi... | 04/02/2002 |
