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| Number | Title | Issue Date |
| 8037713 | Centrifugal compressor assembly and method A centrifugal compressor assembly for compressing refrigerant in a 250-ton capacity or larger chiller system comprising a motor, preferably a compact, high energy density motor or permanent magnet motor, for driving a shaft at a range of sustained operating speeds u... | 10/18/2011 |
| 7975506 | Coaxial economizer assembly and method A coaxial economizer for use in a chiller system comprising an inner housing and an outer housing having a common longitudinal axis. The outer housing has an inlet for receiving a fluid from a upstream compressor stage of a multistage compressor and an outlet for co... | 07/12/2011 |
| 7854142 | Dual air conditioner system shared capacitors An air conditioner having two compressors enables, when one compressor is started, the phase advance capacitor for the other compressor to be temporarily separated and used in parallel with the phase advance capacitor for the one compressor. These compressors can ha... | 12/21/2010 |
| 7810353 | Heat pump system with multi-stage compression A multi-compressor heat pump system configured to provide heating and cooling over a range of ambient temperatures. The compressors can be operated independently and alone or together in series for maximum output. Heat exchangers are selectively fluidically connecte... | 10/12/2010 |
| 7765831 | Temperature control system and method of operating same An air cargo container temperature control system and method utilizing multiple refrigeration circuits and a controller that activates one or more of the refrigeration circuits in various modes to maintain temperature control. Each of the refrigeration circuits comp... | 08/03/2010 |
| 7743627 | Vehicle air conditioning system A vehicle air conditioning system includes a pressure reducing device that is operatively coupled to a condenser downstream therefrom. An evaporator is operatively coupled to the pressure reducing device downstream therefrom. A refrigerant flow booster is operativel... | 06/29/2010 |
| 7644593 | COrefrigeration circuit with sub-cooling of the liquid refrigerant against the receiver flash gas and method for operating the same CO2 refrigeration circuit (2) for circulating a refrigerant in a predetermined flow direction, comprising in flow direction a heat-rejecting heat exchanger (4), a receiver (10) having a liquid portion (12) and a flash gas porti... | 01/12/2010 |
| 7614251 | Reciprocating compressor and refrigerator having the same Disclosed are a reciprocating compressor and a refrigerator having the same. The reciprocating compressor comprises a casing, one reciprocating motor mounted at a frame unit provided in the casing for generating a linear-reciprocation driving force, a first compress... | 11/10/2009 |
| 7451617 | Refrigeration system In order to create a refrigeration system comprising a refrigerant circuit (10), in which a main mass flow (56) of a refrigerant is guided, which may be adapted to different operating conditions in an optimum manner it is suggested that at least two re... | 11/18/2008 |
| 7434414 | Refrigeration apparatus A refrigerant circuit (10) of a refrigeration apparatus is filled up with carbon dioxide as a refrigerant. In the refrigerant circuit (10), a first compressor (21) and a second compressor (22) are arranged in parallel. The first compresso... | 10/14/2008 |
| 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 |
| 7362889 | Elastomeric actuator devices for magnetic resonance imaging The present invention is directed to devices and systems used in magnetic imaging environments that include an actuator device having an elastomeric dielectric film with at least two electrodes, and a frame attached to the actuator device. The frame can have a plura... | 04/22/2008 |
| 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 |
| 7350375 | Receiver and service cartridge for a condenser system A receiver (24) for a condenser system (20) includes a body (32) in fluid communication with a header (28) of the condenser system (20). A first cap (38) is coupled to an end (34) of the body (32) and has a sad... | 04/01/2008 |
| 7331196 | Refrigerating apparatus and refrigerator In the case that heat absorbing means that function in selectively different temperature ranges, are provided in a refrigerating cycle, an object is to provide a refrigerating apparatus capable of suppressing the deterioration of efficiency in either temperature ran... | 02/19/2008 |
| 7325414 | Hybrid tandem compressor system with economizer circuit and reheat function for multi-level cooling A tandem compressor refrigerant system where an economizer circuit and reheat coil are incorporated to provide additional flexibility and control over overall system capacity and sensible heat ratio as well as to increase system efficiency. In this system, tandem co... | 02/05/2008 |
| 7320228 | Refrigerant cycle apparatus In a refrigerant cycle apparatus which is operated at a supercritical pressure on a high-pressure side, for a purpose of maintaining or enhancing performances or reducing generation of clogging or a dimension of a capillary tube, a compressor has a first compression... | 01/22/2008 |
| 7318326 | Multi-air conditioner A multi-air conditioner comprising: a plurality of indoor units for exchanging the heat with indoor air; a plurality of outdoor units, each outdoor unit having an outdoor heat exchanger for exchanging the heat and a compressor for compressing a fluid; a connecting p... | 01/15/2008 |
| 7314356 | Fluid machine An outer end of a seal element for a fixed scroll is extended to a position close to an end of an inside spiral wall of the fixed scroll, and an outwardly extended portion is formed at an outer periphery of a disc-shaped base plate of a movable scroll, so that a bot... | 01/01/2008 |
| 7305846 | Freezing device In a refrigerant circuit (20), a refrigerator circuit (110) and a freezing circuit (30) are connected in parallel to an outdoor circuit (40). In the freezing circuit (30), a freezer circuit (130) and a booster circuit (14... | 12/11/2007 |
| 7302803 | Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigerant unit There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engag... | 12/04/2007 |
| 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 |
| 7278833 | Hybrid compressor A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, a second compression mechanism, which is driven by a second drive source, and a communication path communicating between a suction chamber of the first compression m... | 10/09/2007 |
| 7275386 | Machine for the processing of foods, in particular an ice cream machine A machine for the processing of foods while refrigerating the same at least at times, in particular an ice cream machine, comprising a container (11) to receive the starting substances and a refrigerating device, including a refrigerating circuit (21) ... | 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 |
| 7257955 | Discharge valve to increase heating capacity of heat pumps A heat pump is provided with a discharge valve on a discharge line. The discharge valve can be positioned to modulate or pulse refrigerant flow from the discharge line heading toward an indoor heat exchanger, when in a heating mode. By providing this restriction, th... | 08/21/2007 |
| 7257964 | Air conditioner An air conditioner incorporates valve devices mounted in a plurality of indoor units, respectively, for allowing refrigerant discharged from an outdoor heat exchanger to be introduced into one or more indoor units that are in operation. The refrigerant is prevented ... | 08/21/2007 |
| 7257958 | Multi-temperature cooling system A refrigeration system has first and second evaporators which may be operated at first and second temperatures. Refrigerant from a lower temperature evaporator may be returned to a compressor suction port. Refrigerant from the higher temperature evaporator may be re... | 08/21/2007 |
| 7240502 | Method for controlling operation of air-conditioner A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operat... | 07/10/2007 |
| 7240515 | Centrifugal compressor A compact and efficient compressor is provided, based on using magnetic bearing technology, which can operate at high speed and comprises a reliable control system. The compressor of the present invention makes use of two separate compressors mounted on a single com... | 07/10/2007 |
| 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 |
| 7231783 | Oil control system for a refrigeration system A refrigeration system includes a compressor having a compressor housing and operable to compress a flow of refrigerant. A pump is operable to provide a flow of oil to the compressor. A portion of the oil mixes with the flow of refrigerant and the remainder of the o... | 06/19/2007 |
| 7228708 | Multi-temp system with tandem compressors and reheat function A tandem compressor system is disclosed that delivers compressed refrigerant to a common discharge manifold, and then to a common condenser. From the common condenser, the refrigerant passes to a plurality of evaporators, with each of the evaporators being associate... | 06/12/2007 |
| 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 |
| 7228707 | Hybrid tandem compressor system with multiple evaporators and economizer circuit A tandem compressor refrigerant cycle with an economizer circuit is introduced to provide additional capacity and improve system efficiency. In this system, tandem compressors deliver compressed refrigerant to a common discharge manifold, and then to a common conden... | 06/12/2007 |
| 7225627 | Vapor compression system and method for controlling conditions in ambient surroundings A vapor compression system including an evaporator, a compressor, and a condenser interconnected in a closed-loop system and a method of operating such a system. The method includes the conversion of expanded liquid heat transfer fluid from a liquid form to a high q... | 06/05/2007 |
| 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 unit, the outdoor unit including a first compressor and a second com... | 05/29/2007 |
| 7216505 | Multiple stage recirculating single feed refrigeration system with automatic pump down A method and apparatus for a recirculating system with single feed that incorporates a liquid transfer vessel that helps prevent the vessels in the system from flooding, provides easy displacement of liquid refrigerant from the flooded vessels while economizing refr... | 05/15/2007 |
| 7207183 | System and method for capacity control in a multiple compressor chiller system A capacity control algorithm for a multiple compressor liquid chiller system is provided wherein the speed and number of compressors in operation are controlled in order to obtain a leaving liquid temperature setpoint. In response to an increase in the load in the c... | 04/24/2007 |
| 7201569 | Screw compressor Disclosed is a screw compactor comprising two screw rotors which are disposed in screw rotor bores inside a compressor housing and compress a coolant that enters at a coolant inlet and discharge said coolant at a coolant outlet, and a coolant inlet that is arranged ... | 04/10/2007 |
