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| Number | Title | Issue Date |
| 8161760 | Utilities grid for distributed refrigeration system A distributed refrigeration appliance system for use in a residential kitchen and other locations in a dwelling and includes multiple separate refrigeration appliance modules, a central cooling system and a cooling circuit. The system can also include one or more sa... | 04/24/2012 |
| 8141374 | Multi-mode cooling system and method with evaporative cooling A air channeling sub-system may include a mechanical cooling section and a direct evaporative cooling section. The direct evaporative cooling section may be downstream from the mechanical cooling section. Cooling air is channeled through the air channeling sub-syste... | 03/27/2012 |
| 7937961 | System and method for controlling demand of multi-air-conditioner A system for controlling multiple air conditioners. The system includes a demand control unit configured to calculate an estimated power amount to be used by the multiple air conditioners based on an amount of power consumed by the multiple air conditioners during a... | 05/10/2011 |
| 7870750 | System and method for controlling demand of multi-air-conditioner A system for controlling multiple air conditioners. The system includes a demand control unit configured to divide the multiple air conditioners into groups, to assign a priority level to each group, to calculate an estimated power amount used by the multiple air co... | 01/18/2011 |
| 7861546 | Refrigeration system capacity controller and method A controller and method for control of a refrigeration system having a compressor rack operable at a plurality of capacities may include determining a rate of change in suction pressure for a first capacity, determining a rate of change in suction pressure associate... | 01/04/2011 |
| 7793509 | 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... | 09/14/2010 |
| 7779642 | Air conditioner and driving method thereof An air conditioner comprises: a first compression unit (C1) and a second compression unit (C2) for respectively compressing a refrigerant; an outdoor heat exchanger (200) provided at an outdoor unit and connected via the secondcontrol valve (... | 08/24/2010 |
| 7765817 | Refrigeration system In a refrigeration system, a first non-inverter compressor (2B) backs up one of an inverter compressor (2A) and a second non-inverter compressor (2C) by switching of a third four-way selector valve (3C). The refrigeration system includes:... | 08/03/2010 |
| 7762091 | Apparatus for controlling the capacity of an air conditioner and control method using the same Disclosed herein is an apparatus for controlling the capacity of an air conditioner and a control method using the same. The capacity control apparatus is configured in such a fashion that a 3-way or 4-way direction-switching member and a low-pressure equalizing sol... | 07/27/2010 |
| 7752857 | Refrigerator and air conditioner A refrigerator has a coolant cooler for cooling a coolant at the entrance of a flow control valve, when the cooling amount in the coolant cooler is deficient as well as excessive. The refrigerator includes a compressor for compressing the coolant, a radiator for rad... | 07/13/2010 |
| 7730730 | Control method of an air conditioner indoor unit A control method of a multi-air conditioner in which a plurality of indoor units is connected to one outdoor unit and refrigerant flow amount is adjusted by electronic expansion valves comprises a share step in which a plurality of indoor units exchanges their opera... | 06/08/2010 |
| 7726140 | System and method for using hot gas re-heat for humidity control A humidity control method is provided for a multi-stage cooling system having two or more refrigerant circuits. A hot gas re-heat circuit having a hot gas re-heat coil, an evaporator and a compressor, such as the evaporator and compressor utilized in one of the refr... | 06/01/2010 |
| 7721559 | Multi-type air conditioner and method for controlling the same Multi-type air conditioner including a plurality of compressors, a plurality of temperature sensors mounted in the plurality of compressors for sensing temperatures in the compressors respectively, and an equalizing pipe in communication with the plurality of compre... | 05/25/2010 |
| 7665318 | Compressor controlling apparatus and method A compressor controlling apparatus including a bypass unit connected between an outlet and an inlet of the compressor and a control unit. The control unit reduces pressure difference between the outlet and the inlet of the compressor by the bypass unit to start the ... | 02/23/2010 |
| 7661274 | 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... | 02/16/2010 |
| 7603871 | High-flow cold air chiller An air-chiller comprises a primary compressor that circulates a mixture of four refrigerants with different boiling points through a primary condenser and several heat-exchanger coils in series. Each heat exchanger coil includes a large section of tubing in which ar... | 10/20/2009 |
| 7578137 | Air-conditioning system with multiple indoor and outdoor units and control system therefor An air conditioner, in which a controller is installed separately from a plurality of indoor units and a plurality of outdoor units so that only the controller is added and conventional outdoor units are used when plural indoor units are required, thereby reducing c... | 08/25/2009 |
| 7526924 | Refrigerator and air conditioner A refrigerator has a coolant cooler for cooling a coolant at the entrance of a flow control valve when the cooling amount in the coolant cooler is deficient as well as excessive. The refrigerator includes a compressor for compressing the coolant, a radiator for radi... | 05/05/2009 |
| 7478539 | Two-stage linear compressor A refrigeration system includes a two-stage linear compressor having a first piston disposed in a first cylinder and a second piston disposed in a second cylinder. The linear compressor is operable in an economizer cycle wherein the first piston operates as a first ... | 01/20/2009 |
| 7475557 | Refrigerator The invention provides a refrigerator having a two-stage compression compressor capable of performing efficient cooling of a both a refrigerator compartment and a freezer compartment. A high-pressure delivery outlet of a two-stage compression compressor 12 is... | 01/13/2009 |
| 7472558 | Method of determining optimal air conditioner control A method of determining optimal air conditioner control is provided that includes determining power consumptions of servers and computer room air conditioners, calculating a number of calories processed by each air conditioner and determining a total number of calor... | 01/06/2009 |
| 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 |
| 7377120 | HVAC twinning control A control is provided for a first HVAC unit that is coupled to a common duct shared with at least one other HVAC unit. The control comprises a twinning connection for communication with at least a second control of another HVAC unit, and a voltage signal applied to ... | 05/27/2008 |
| 7370486 | Air-treatment system with secondary circuit An air-treatment system includes a cooling circuit, a first heat exchanger in thermal communication with the cooling circuit, and a secondary circuit in thermal communication with the first heat exchanger. The air-treatment system also includes a controller in commu... | 05/13/2008 |
| 7360375 | Climate control system with a vapour compression circuit combined with an absorption circuit The system (SC) includes a first, vapour compression circuit (A), including a compressor (1) with its output connected to a condenser (2; 2′) followed by an expansion device (4) and an evaporator (5; 16) having its output connected to t... | 04/22/2008 |
| 7347057 | Control of dual-heated absorption heat-transfer machines An absorption, heat-transfer system with an operationally interconnected generator, absorber, condenser, and evaporator; at least two separate heat sources for heating the generator; and a controller for controlling the heat sources. The controller, e.g., a programm... | 03/25/2008 |
| 7349824 | Method and system for evaluating the efficiency of an air conditioning apparatus The applicant describes a system and methods of calculating the overall operating efficiency of an air conditioning chiller that evaluates efficiency of the component parts of the chiller and generates an overall efficiency based on these component efficiency values... | 03/25/2008 |
| 7340912 | High efficiency heating, ventilating and air conditioning system A primary air flow path has a pre-cooler and an evaporator. A secondary air flow path includes portions of an air conditioner assembly including a compressor and an condenser. The air conditioner assembly also has lines connecting the compressor and the condenser th... | 03/11/2008 |
| 7340909 | Central control system for multi-type air conditioners and operating method thereof Disclosed are a central control system for multi-type air conditioners and an operating method thereof. In the central control system, multi-type air conditioners comprise a large number of indoor devices and a small number of outdoor devices, and a central controll... | 03/11/2008 |
| 7340899 | Solar power generation system An economical solar generator system is provided wherein the solar energy collector is constructed from a plurality of heat exchangers of the kind used as evaporators in automobile air conditioners. The solar generator system includes a plurality of said heat exchan... | 03/11/2008 |
| 7342756 | Fault recognition in systems with multiple circuits A method for detecting compressor or system degradation or malfunction in a multiple circuit compressor system includes the steps of providing a multiple circuit compressor system including at least a first circuit and a second circuit; and comparing a first value c... | 03/11/2008 |
| 7334417 | Air conditioner and power line communication system An air conditioner and a power line communication system high in reliability and free of malfunction facilitates the installation work such as the wiring. The air conditioner for conducting communication through a power line includes a bridge unit connected to at le... | 02/26/2008 |
| 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 |
| 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 |
| RE39924 | Refrigeration system with modulated condensing loops A refrigeration system having a main refrigeration circuit having a condensing stage, wherein a first refrigerant in a high pressure gas state is condensed at least partially to a liquid state. The condensing stage has a pair of stand-alone condensing stage closed ... | 11/27/2007 |
| 7293425 | Thermo siphon chiller refrigerator for use in cold district In order to provide a thermo-siphon chiller refrigerator for use in cold districts which performs natural refrigerant-circulation refrigerating cycle and also can perform a forced refrigerant-circulation refrigerating cycle when outside air temperature is high by us... | 11/13/2007 |
| 7293954 | Centrifugal compressor for turbo chiller, turbo chiller, and control method therefor A turbo chiller that can accurately determine the existence of surging occurring in a centrifugal compressor is provided. In a centrifugal compressor of a turbo chiller, which includes an impeller for compressing refrigerant, a resistance temperature sensor for dete... | 11/13/2007 |
| 7290400 | Stationary vehicle air conditioning system and method The invention pertains to a stationary vehicle air conditioning system with a refrigerant circuit, in which a compressor circulates refrigerant through a refrigerant circuit including at least one condenser. The one compressor may be powered by the vehicle's mechani... | 11/06/2007 |
| 7290399 | Multi-circuit dehumidification heat pump system In a multi-circuit heat pump system least one of the circuits has a reheat function. Various reheat concepts may be independently utilized for each circuit to reheat and dehumidify air. Moreover, the ability to bypass refrigerant around the outdoor heat exchanger ma... | 11/06/2007 |
| 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 |
