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| Number | Title | Issue Date |
| RE42966 | Tandem compressors with discharge valve on connecting lines A refrigerant cycle is disclosed having a number of compressors operating in tandem and supplying a compressed refrigerant to a refrigerant system. Discharge lines communicate a compressed refrigerant to a central discharge line for receiving flow from all tandem co... | 11/29/2011 |
| 7631510 | Multi-stage refrigeration system including sub-cycle control characteristics A multi-stage refrigeration system is provided. The refrigeration system includes a first compression element which produces a first compressed refrigerant stream. A mixer combines the first compressed refrigerant stream with an auxiliary refrigerant stream. A secon... | 12/15/2009 |
| RE40499 | Pulsed flow for capacity control Step control in capacity modulation of a refrigeration or air conditioning circuit is achieved by rapidly cycling a solenoid valve in the suction line, economizer circuit or in a bypass with the percent of “open” time for the valve regulating the rate of flow th... | 09/16/2008 |
| 7409833 | Dual mode compressor with automatic compression ratio adjustment for adapting to multiple operating conditions An apparatus and method for compressing gas refrigerant using two different compressors operated alternatively in a series or parallel mode for obtaining two different compression ratios and thereby provide efficient operation for both a relatively lower suction pre... | 08/12/2008 |
| 7353660 | Multi-temperature cooling system with unloading A compressor has an inlet, an outlet, and at least an intermediate first port therebetween. A condenser is coupled to the compressor to receive refrigerant. First and second evaporators are coupled to the condenser to receive refrigerant. Conduits define a return fl... | 04/08/2008 |
| 7299648 | Refrigeration system of air conditioning apparatuses with bypass line between inlet and outlet of compressor A refrigeration system of air conditioning apparatuses with a bypass line between the inlet and outlet of a compressor. The refrigeration system (1) has an expansion unit (10) to execute adiabatic expansion of refrigerant, an indoor unit (20) wi... | 11/27/2007 |
| 7287395 | Distributed cooling system A system includes a plurality of distributed refrigeration units respectively coupled to discrete refrigeration circuits. Each refrigeration unit may include a variable compressor, a fixed compressor, a condensing unit, and a controller. The controller compares an o... | 10/30/2007 |
| 7275387 | Integrated ice and beverage dispenser An ice cube-making machine that is characterized by noiseless operation at the location where ice cubes are dispensed and be lightweight packages for ease of installation. The ice cube-making machine has an evaporator package, a separate compressor package and a sep... | 10/02/2007 |
| 7266959 | Cold climate air-source heat pump An improved cold climate air-source heat pump comprising at least a primary compressor, a booster compressor, a first heat exchanger associated with an indoor environment and a second heat exchanger associated with an outdoor environment and with one heat exchanger ... | 09/11/2007 |
| 7257957 | Utilization of bypass refrigerant to provide reheat and dehumidification function in refrigerant system A refrigerant system is provided with an unloader bypass line to selectively unload the compressor and deliver refrigerant from a partially (or fully) compressed location back to a suction port of the compressor. A section of this unloader bypass line is placed in t... | 08/21/2007 |
| 7246507 | Air conditioner Provided is an air conditioner which has a separator with an oil tank for storing extra oil; a first oil return tube opening above the surface of the extra oil; and a second oil return tube opening below the surface of the extra oil. When the refrigeration cycle can... | 07/24/2007 |
| 7237405 | Refrigeration apparatus In the case where a 100 percent heat recovery operation mode is performed without using an outdoor heat exchanger in a refrigeration apparatus which is provided with utilization-side heat exchangers of a plurality of piping systems and in which liquid-side communica... | 07/03/2007 |
| 7234318 | Outdoor, multiple stage, single pass and non-recirculating refrigeration system for rapid cooling of athletes, firefighters and others A multiple stage, single pass and non-recirculating refrigeration system is provided for either outdoor use or for use with temporary structures such as emergency firefighter tents. The refrigeration system utilizes, for example, three evaporative coils in series to... | 06/26/2007 |
| 7228709 | Unitary air conditioning system A unitary air conditioning system comprises an outdoor unit including a compressor for compressing a refrigerant, an outdoor heat exchanger for heat exchange of the refrigerant and an expander connected to the outdoor heat exchanger, for expanding the refrigerant; a... | 06/12/2007 |
| 7207184 | Method for regulating a most loaded circuit in a multi-circuit refrigeration system A method for regulating a most loaded circuit of a refrigeration system is provided. Each circuit includes at least one case and an EEPR valve. At least one controller communicates with the EEPR valves for receiving signals from the circuits corresponding to operati... | 04/24/2007 |
| 7204099 | Refrigerant system with vapor injection and liquid injection through separate passages A refrigerant system is provided with economizer vapor injection and liquid injection functions. As is known, the economizer function enhances performance of the refrigerant system. The liquid injection lowers the discharge temperature of the refrigerant to provide ... | 04/17/2007 |
| 7201008 | Vapor compression system performance enhancement and discharge temperature reduction in the unloaded mode of operation A vapor compression system includes a main vapor compression circuit having a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the compressor having a suction port, a main discharge port and an intermediate... | 04/10/2007 |
| 7178352 | Compressor A compressor has at least three-rotors. A first compression path between first inlet and outlet ports is associated with interaction of the first and second rotors. A second compression path between second inlet and outlet ports is associated with interaction of the... | 02/20/2007 |
| 7162873 | Method of running a condenser for liquidation of steam or vapor The present invention relates to a system in which a process of condensing steam or vapor is used for cooling or heating an ambient environment. An increase in the effectiveness of the condensing process is achieved by adjusting the input of steam or vapor into the ... | 01/16/2007 |
| 7155920 | Refrigerant cycle with tandem compressors and multiple condensers A tandem compressor system is utilized that receives refrigerant from a common suction manifold, and from a common evaporator. From the compressors, the refrigerant passes to a plurality of condensers, with each of the condensers being associated with a separate zon... | 01/02/2007 |
| 7143594 | Control method for operating a refrigeration system A method of controlling a heating cycle of a refrigeration system is provided that includes a refrigerant circuit. The refrigerant circuit includes a compressor having a suction port and an outlet having a discharge port with a hot gas compressor discharge line, a c... | 12/05/2006 |
| 7140198 | Air conditioner The present invention is capable of eliminating the line unit in an air conditioner that includes a plurality of heat source units, and hold increases in onsite line construction to a minimum while making it possible to adjust the amount of refrigerant in the air co... | 11/28/2006 |
| 7114349 | Refrigerant system with common economizer and liquid-suction heat exchanger A refrigerant system is provided where the functions of an economizer heat exchanger and liquid-suction heat exchanger are combined. The two configurations are disclosed with a single common heat exchanger construction. In a first configuration, a series of valves s... | 10/03/2006 |
| 7107776 | Air conditioning system for vehicle An air conditioning system includes a primary or engine-driven compressor that is driven by a primary driving source or engine, and a secondary or motor-driven compressor that is driven by a secondary driving source or motor. The air conditioning system increases in... | 09/19/2006 |
| 7104075 | Arrangement and method for controlling the discharge of carbon dioxide for air conditioning systems A method and system for discharging refrigerant, such as carbon dioxide, from an air conditioning system. The discharge rate of the refrigerant from the air conditioning system is controlled by a discharge rate controller, even as refrigerant pressure at the system ... | 09/12/2006 |
| 7086244 | Refrigerant cycle apparatus An object of the present invention is to provide a refrigerant cycle apparatus which can reduce a production cost while hastening equalization of pressure in a refrigerant circuit after a compressor is stopped, the apparatus comprises a bypass circuit which causes a... | 08/08/2006 |
| 7076963 | Two-stage compressor for an automotive air conditioner, which can be driven by a vehicle running engine and an electric motor different therefrom A compressor is used in an automotive air conditioner to compress a refrigerant gas. The compressor includes a first compression mechanism driven by an automobile engine and a second compression mechanism driven by an electric motor. The first and the second compres... | 07/18/2006 |
| 7059144 | Methods of freezeout prevention for very low temperature mixed refrigerant systems Refrigerant freezeout is prevented by the use of a controlled bypass flow that causes a warming of the lowest temperature refrigerant in a refrigeration system that achieves very low temperatures by using a mixture of refrigerants comprising at least two refrigerant... | 06/13/2006 |
| 7028502 | Refrigeration equipment In a refrigerating apparatus comprising a plurality of application-side heat exchangers (41), (45, 51) for air-conditioning and for cold-storage/freezing, it is configured so as to be capable of corresponding to various types of operation patterns when... | 04/18/2006 |
| 7017353 | Integrated ice and beverage dispenser An ice cube-making machine that is characterized by noiseless operation at the location where ice cubes are dispensed and be lightweight packages for ease of installation. The ice cube-making machine has an evaporator package, a separate compressor package and a sep... | 03/28/2006 |
| 7013669 | Arrangement for multi-stage heat pump assembly A gasdynamic arrangement for a multi-stage centrifugal turbomachine, such as a two-stage compressor, comprising two coaxial impellers assembled on a common shaft with axial intake ports and radial peripheral discharge zones, the intake ports of the two impellers pre... | 03/21/2006 |
| 6966193 | Control of multi-circuit economized system Multiple refrigerant circuits are operated in parallel, and each has an economizer cycle. One of the two circuits may have a greater capacity than the other. By controlling the two circuits to run in economized, conventional, bypassed, or economizer bypassed operati... | 11/22/2005 |
| 6966192 | Tandem compressors with discharge valve on connecting lines A refrigerant cycle is disclosed having a number of compressors operating in tandem and supplying a compressed refrigerant to a refrigerant system. Discharge lines communicate a compressed refrigerant to a central discharge line for receiving flow from all tandem co... | 11/22/2005 |
| 6955059 | Vapor compression system A vapor compression system includes a main vapor compression circuit including a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the compressor having a main discharge port, a suction port and an economize... | 10/18/2005 |
| 6948916 | Piping layout for multiple compressor system A multiple hermetic compressor assembly comprising a first compressor and an adjacent, second compressor interconnected by a hot gas pressure discharge manifold, a suction gas pressure equalization manifold, a suction manifold and an oil equalization manifold, the m... | 09/27/2005 |
| 6941767 | Compression mechanism oil equalizing circuit, refrigeration system heat source unit, and refrigeration system provided with the same The present invention provides an oil equalizing circuit that can improve the reliability of the oil supply to the compression mechanisms in a refrigeration system provided with a plurality of compression mechanisms. The compressor group of the air conditioning syst... | 09/13/2005 |
| 6938430 | Refrigerating device A refrigerating apparatus including three compressors (2A, 2B, 2C) and application side heat exchangers (41) (45, 51) for two channels is formed so that a first compressor (2A) is used only for the application side heat exch... | 09/06/2005 |
| 6898941 | Supercritical pressure regulation of vapor compression system by regulation of expansion machine flowrate The expansion machine flowrate of a vapor compression system is regulated to directly control the supercritical pressure in the high pressure component of the transcritical system. The expansion machine is directly linked to a recompressor which recompresses the vap... | 05/31/2005 |
| 6826917 | Initial pull down control for a multiple compressor refrigeration system A control system is provided to determine when to use additional compressors in a multiple compressor refrigeration system during a pull down operation. The control system determines the rate of change of the difference between the leaving chilled water temperature ... | 12/07/2004 |
| 6449972 | Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor A control for a refrigeration system serviced by a special pulse width modulated compressor coupled to a condenser and evaporator. The system can be of the distributed type wherein the condenser and compressor may be coupled to service a group of adjacent... | 09/17/2002 |
