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Match Document Document Title
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...
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...
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...
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...
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...
7270278 Distributed intelligence control for commercial refrigeration  
A commercial refrigeration system including a compressor, a condenser, a valve, and an evaporator coil, all of which are in fluid communication. The refrigeration system further including a fixture...
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...
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...
7231773 Startup control system and method for a multiple compressor chiller system  
A startup control algorithm for a multiple compressor liquid chiller system is provided wherein the maximum number of compressors to be started to satisfy system load conditions is provided. The...
7207784 Hybrid compressor and control device  
When a hybrid compressor starts being driven by an electric motor, the electric current of a capacity control valve is applied at an initial control electric current SS that is greater than a...
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...
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...
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...
7174730 Method for controlling air conditioner having multi-compressor  
Disclosed is a method for controlling an air conditioner having a multi-compressor capable of improving an ability that corresponds to a room cooling load or a room heating load and capable of...
7168257 Rotary compressor, method for manufacturing the same, and defroster for refrigerant circuit  
An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible...
7159518 Tempering device for printing presses  
A tempering device for printing presses, includes a compression refrigerating plant with a condenser and an evaporator, in which a coolant circulates in a compression refrigerating path, and a free...
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...
7150156 Product simulating probe and method  
A probe and method for simulating refrigerated product temperature includes a housing containing a thermal mass having thermo-physical properties similar to refrigerated food product, a temperature...
7111467 Ultra-low temperature closed-loop recirculating gas chilling system  
Disclosed is an ultra-low temperature, dual-compressor ( 114,144 ), recirculating gas chilling system that includes a closed-loop mixed-refrigerant primary refrigeration system ( 110 ) in...
7096681 System and method for variable speed operation of a screw compressor  
A system and method are provided for variable speed operation of a screw compressor to obtain increased capacity and efficiency. The screw compressor is connected to an induction motor driven by a...
7093452 Air conditioner  
The invention is an air conditioning unit 10 consisting of a housing 11 having at least one air inlet 21 for receiving air to be conditioned and at least one outlet 19 for discharging...
7083109 Thermostat having modulated and non-modulated provisions  
A thermostat providing modulated or analog control of valves or dampers of an air management system. This permits operating a single cooling or heating stage with partially open valves or dampers...
7062930 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 is connected to one of the...
7028768 Fluid heat exchange control system  
A method of controlling a hydronic system is provided. The hydronic system includes a plurality of fluid heat exchange units for feeding a load, and a bypass valve for bypassing the load. The...
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...
7028495 Refrigerant cycle apparatus  
For a purpose of realizing a refrigerant cycle apparatus capable of exactly detecting a pressure reverse phenomenon caused in a compression element of a compressor of a multistage compression type,...
7028491 Method and apparatus for reducing inrush current in a multi-stage compressor  
A compressor assembly having a first compression mechanism operatively coupled to a first motor and a second compression mechanism operatively coupled to a second motor. The first compression...
7027958 Food quality and safety model for refrigerated food  
A system and method according to the invention includes a communication network and a food product manager in communication with a monitored location through the communication network, wherein the...
7000422 Refrigeration system and method of configuring the same  
A refrigeration system including a compressor, condenser, valve, and evaporator in fluid communication; a system controller operable to control one or more aspects of the refrigeration system, and...
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...
6978627 Air conditioner control system, central remote controller, and facility controller  
An operation information processing section ( 11 ) in a central remote controller ( 5 ) processes operation information from operation setting buttons ( 8 a ,8 b ,8 c ), each of which is...
6962058 Air conditioner and method of controlling such  
The object of this invention is to provide an air conditioner with a variable capacity compressor ( 2 ) parallely connected to a fixed capacity compressor ( 4 ), and a method of controlling the...
6955058 Refrigerant cycle with tandem economized and conventional compressors  
A refrigerant cycle is provided with tandem compressors. Only some of the multiple compressors are provided with an economized cycle, and an optional unloader valve for selectively returning flow...
6951116 Air conditioner and method for controlling electronic expansion valve of air conditioner  
Disclosed are an air conditioner in which one or more compressors are operated so that the refrigerant compression capacity of the operating compressor(s) is variably changed in accordance with a...
6945061 Control unit for variable displacement compressors  
A control unit for variable displacement compressors is used for two independent air conditioning cycles, wherein two compressors 1, 11 driven by a common external drive source 8 include...
6939109 Pump control system  
The present invention provides a system which comprises primary supply pumps and secondary supply pumps and controls pressurized water supply systems, air-conditioning systems, or the like that...
6938429 Refrigerating and air-conditioning system  
A refrigerating and air-conditioning system includes a refrigerating machine connected to a showcase by a first refrigerant flow passage, an air-conditioning apparatus for connection of an indoor...
6931866 Multistage compression type rotary compressor and cooling device  
A multi-stage compression type rotary compressor, having a driving element and a first and a second rotary compression element that are driven by the driving element in a sealed container, is...
6928828 Tandem compressors with economized operation  
A refrigerant cycle includes economized tandem compressors. The refrigerant cycle is also provided with a common economizer circuit for all tandem compressors. Common manifolds communicate...
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...
6907746 Multistage compression type rotary compressor and cooling device  
A multi-stage compression type rotary compressor, having a driving element and a first and a second rotary compression element that are driven by the driving element in a sealed container, is...
6895781 Multiple refrigerant circuits with single economizer heat exchanger  
A multiple circuit refrigerant system includes a single economizer heat exchanger utilized for each of at least two circuits. The use of the single economizer heat exchanger reduces the cost of...
6877339 Ejector cycle  
In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a variable throttle device is disposed upstream from the nozzle to decompress and expand high-pressure...
6874326 Air conditioning system with two compressors and method for operating the same  
Disclosed are an air conditioning system with two compressors and a method for operating the same, so as to variably change a compression capacity of a refrigerant according to the variation of...
6871505 Compressor-controlling device and method for air conditioner comprising a plurality of compressors  
Disclosed are compressor-controlling device and method for an air conditioner comprising a plurality of compressors. In case several compressors selected from the plural compressors are stopped for...
6868681 Air conditioner  
Disclosed herein is an air conditioner comprising a plurality of indoor units and a common outdoor unit connected to each of the indoor units. The air conditioner further includes an additional...
6843067 Air conditioner and method for controlling electronic expansion valve of air conditioner  
Disclosed are an air conditioner for cooling or heating air in a room by compressing, condensing, expanding and evaporating a refrigerant, and a method for controlling an electronic expansion valve...
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...
6832488 Refrigerating machine  
A refrigerating machine includes a plurality of compressors driven by motors each having an armature core incorporating a squirrel cage conductor and a permanent magnet which is magnetized so as to...
6829903 Air conditioner and method for operating air conditioner in cooling mode  
Disclosed are an air conditioner, which reduces an electric power consumption rate and rapidly copes with the requirements of a user, and a method for operating the air conditioner in a cooling...
Matches 1 - 50 out of 516 1 2 3 4 5 6 7 8 9 10 11 >