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| Number | Title | Issue Date |
| 8141376 | Air conditioning system having a pressure compensation device An air conditioning system including an outdoor heat-exchanging unit, at least one indoor heat-exchanging unit, a gaseous refrigerant line connected between the outdoor heat-exchanging unit and the indoor heat-exchanging unit, to allow a refrigerant in a gaseous sta... | 03/27/2012 |
| RE43121 | Cascade refrigeration system A cascade refrigeration system is provided. The cascade refrigeration system includes a low stage having a first refrigerant flowing therethrough and a high stage having a second refrigerant flowing therethrough. The low stage includes a compressor and evaporator co... | 01/24/2012 |
| 8020393 | Heat pump type hot water supply outdoor apparatus A heat pump type hot water supply outdoor apparatus, in a compressor, a water heat exchanger, a first expansion valve, a medium pressure receiver, a second expansion valve, and an air heat exchanger are connected circularly, has an injection circuit, which is a bypa... | 09/20/2011 |
| 7918097 | Air conditioning system An air conditioning system is able to decrease the amount of refrigerant between a first expansion device and an injection valve and thus adjust the pressure of an injected refrigerant by decreasing the opening degree of the first expansion device and maintaining th... | 04/05/2011 |
| 7437880 | Pump bypass control apparatus and apparatus and method for maintaining a predetermined flow-through rate of a fluid through a pump A bypass control apparatus is used with a pump pumping a fluid therethrough. A bypass flow line circulates fluid about the pump. A bypass valve is interposed in the bypass flow line and moves between an opened state to permit the fluid to circulate through the bypas... | 10/21/2008 |
| 7434415 | System and method for using hot gas reheat for humidity control A humidity control method is provided for a multi-stage cooling system having two or more refrigerant circuits that balances humidity control and cooling demand. Each refrigerant circuit includes a compressor, a condenser and an evaporator. A hot gas reheat circuit ... | 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 |
| 7353659 | System and method for controlling an economizer circuit A control algorithm for controlling an economizer circuit in a chiller system is provided. The control algorithm opens and closes a port valve in the economizer circuit in response to predetermined criteria to engage and disengage the economizer circuit. The predete... | 04/08/2008 |
| 7353664 | Heat pump and compressor discharge pressure controlling apparatus for the same Disclosed herein is a heat pump. The heat pump comprises a compressor, indoor and outdoor heat exchangers for condensing or evaporating refrigerant compressed by the compressor according to cooling or heating operation mode, a four-way valve for guiding the flow of ... | 04/08/2008 |
| 7350366 | Heat pump The present invention provides a heat pump including: a compressor; a radiator; a first throttling device having a variable opening; an expander; a second throttling device having a variable opening; an evaporator; piping that connects the compressor, the radiator, ... | 04/01/2008 |
| 7296428 | Table top refrigerated beverage dispenser A self-contained beverage chilling apparatus including a refrigerant cooling system comprising a refrigerant reservoir in a fluid communication with a cold plate, a refrigerator accumulator, a compressor and a refrigerant condenser mounted within a housing unit. The... | 11/20/2007 |
| 7295010 | Low temperature probe having transmitting coil and receiving coil or transmit/receive coil and used in NMR apparatus In an ultrahigh sensitive NMR apparatus, a stability of a temperature of a very low temperature probe coil is improved. A low temperature probe of the high sensitive NMR apparatus is structured at a very low temperature by a cooling apparatus. A cooling medium at a ... | 11/13/2007 |
| 7278832 | Scroll compressor with enlarged vapor injection port area Scroll compressors are provided with vapor injection or by-pass ports that will allow greater flow of refrigerant through the port than was the case in the prior art. The prior art has typically utilized a single injection port having a diameter equal to or slightly... | 10/09/2007 |
| 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 |
| 7251947 | Refrigerant system with suction line restrictor for capacity correction A fixed restriction is placed in a suction line leading to a compressor. The size of the restriction is selected to achieve a desired capacity reduction (correction) for the refrigerant system compressor. By selectively restricting the flow of refrigerant through th... | 08/07/2007 |
| 7251948 | Pressure equalizer of compressor of air conditioner A pressure equalizer of a compressor of an air conditioner comprises a bypass pipe installed between a refrigerant suction pipe and a refrigerant discharge pipe of a compressor, a valve housing connected to a middle portion of the bypass pipe and provided with a par... | 08/07/2007 |
| 7228710 | Indentation to optimize vapor injection through ports extending through scroll wrap A scroll compressor is provided with economizer injection ports, which extend through the wrap of one of the scroll members. Preferably the injection ports are formed through a so-called “hybrid” wrap, which has a varying thickness. The other scroll member is pr... | 06/12/2007 |
| 7216697 | Method of operating a cooling and heating circuit of a motor vehicle In a method for operating a cooling and heating circuit of a motor vehicle driven by an internal combustion engine, a first cooling medium path is provided through a bypass conduit, a second cooling medium path is provided through a main cooler of the internal combu... | 05/15/2007 |
| RE39625 | Boosted air source heat pump A boosted source heat pump (BSHP) is presented having a primary compressor, a booster compressor, an economizer, and a lubricant management system. At least the primary compressor is a twin-single compressor. The lubricant management system includes traps to prevent... | 05/15/2007 |
| 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 |
| 7152416 | Hot gas bypass through four-way reversing valve A heat pump four-way valve selectively routes refrigerant to either indoor or outdoor heat exchanger. The position of the plunger inside the valve can also be adjusted to selectively provide a hot gas by-pass function by routing a portion of refrigerant from dischar... | 12/26/2006 |
| 7121811 | Capacity control valve for variable displacement compressor The object is to provide a capacity control valve for a variable displacement compressor, which is not adversely affected by pressure from a pressure-regulating chamber. The cross-sectional area of a valve hole of a high pressure-side valve seat for introducing disc... | 10/17/2006 |
| 7100386 | Economizer/by-pass port inserts to control port size Compressor performance is affected by the size of an economizer or by-pass port area. To achieve variation in size, an insert is inserted into an economizer and/or unloader flow passage to provide a desired port area. The insert may be selected from a number of avai... | 09/05/2006 |
| 7036328 | Air conditioner An air conditioner which includes a plurality of indoor units to cool air of a plurality of rooms. Included is a plurality of branch refrigerant lines that each include a backflow prevention part provided at an end of the branch refrigerant line and/or a pulsation d... | 05/02/2006 |
| 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 |
| 6978630 | Dual-circuit refrigeration system A refrigeration system and method of refrigeration employ dual refrigeration circuits. Each circuit has an independent compressor, condenser and evaporator. In one refrigeration circuit, the flow of the refrigerant from the condenser to the evaporator is regulated i... | 12/27/2005 |
| 6973796 | Multi-air conditioner and operation method thereof Disclosed is a multi-air conditioner including: an outdoor unit having a compressor, an outdoor heat exchanger, and an outdoor fan for ventilating the outdoor heat exchanger; a plurality of indoor units each having an electronic expansion valve and an indoor heat ex... | 12/13/2005 |
| 6973797 | Capacity control for economizer refrigeration systems An economizer-equipped refrigeration system and method is provided for simultaneous operation of at least one capacity control valve controlling an independent bypass circuit with operation and variable control of the economizer circuit to permit efficient, flexible... | 12/13/2005 |
| 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 |
| 6938438 | Vapor compression system with bypass/economizer circuits A vapor compression system includes a main circuit comprising a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the compressor having a suction port, a discharge port and an intermediate pressure port; an ... | 09/06/2005 |
| 6928830 | Linearly actuated manual fresh air exchange A refrigeration unit is provided with a manually operated fresh air vent made up of a cap assembly and a handle assembly which move together in a linear/axial direction. The handle assembly is rotatable to change the position of the fresh air vent. The fresh air ven... | 08/16/2005 |
| 6925822 | Oil return control in refrigerant system Several control algorithms reduce the likelihood of insufficient oil return to the compressor. One algorithm is useful in a multi-circuit refrigerant system. A control reduces the cooling capacity of one of the circuits if the number of compressor start/stop cycles ... | 08/09/2005 |
| 6892548 | Rotary compressor and refrigerant cycle system having the same Disclosed herein are a variable capacity rotary compressor and a refrigerant cycle system having the variable capacity rotary compressor. The compressor includes a cooling unit and a pressure reducing unit to reduce temperature and pressure of a bypassed refrigerant... | 05/17/2005 |
| 6843066 | Air conditioning system and method for controlling the same Disclosed are an air conditioning system, in which the total operating capacity of compressors is variably controlled in accordance with a cooling or heating load in a room, and a method for controlling the air conditioning method, thus improving comfortableness in ... | 01/18/2005 |
| 6772600 | Multi-unit air conditioner and method for controlling the same Multi-unit air conditioner including an outdoor unit including a flow path control valve for controlling a flow path of refrigerant from a compressor, outdoor heat exchanger having one side in communication with the flow path control valve, a first bypass pipeline h... | 08/10/2004 |
| 6658867 | Performance enhancement of vapor compression system In an air conditioning system including a compressor, a condenser, and an evaporator, a process includes the steps of feeding discharged refrigerant from the compressor to the condenser so as to provide a condensed refrigerant flow; splitting the condense... | 12/09/2003 |
| 6619062 | Scroll compressor and air conditioner A scroll compressor comprises an operating state detection part (27) detecting an operating state, a variable-speed motor (28), a control part (26) and an unloading mechanism (12) serving as capacity control means. The control part (26) controls operation... | 09/16/2003 |
| 6574978 | Very low temperature refrigeration system with controlled cool down and warm up rates and long term heating capabilities Heating/defrost constructions of a very low temperature refrigeration system having a defrost supply circuit and a defrost return bypass circuit optimizing the heating/defrost cycle, preventing overload (excessive pressure) of its refrigeration process an... | 06/10/2003 |
| 6571576 | Injection of liquid and vapor refrigerant through economizer ports An improved apparatus and method for injecting a liquid/vapor into compression chambers at an intermediate pressure utilizes the economizer injection ports already found in the compressor. By selectively communicating a liquid to be injected into the comp... | 06/03/2003 |
| 6553778 | Multi-stage refrigeration system A multi-stage cooling system is disclosed. The multi-stage cooling system is capable of providing a plurality of cooling capacities. The cooling system has a plurality of independently operable compressors. A control system operates the compressors to pro... | 04/29/2003 |
