Matches 1 - 50 out of 60 1 2 >


Match Document Document Title
US20120210736 CASCADE FLOATING INTERMEDIATE TEMPERATURE HEAT PUMP SYSTEM  
A cascade heat pump system is configured with variable-speed compressors which allow operation at a high system coefficient of performance for a given thermal load. An electronic control module...
US20070199338 Variable speed control  
A variable speed control system is provided for use with a heat pump heating/cooling system having a variable speed compressor. The control system includes a remote transceiver, a second...
US20080104985 Constant temperature CRAC control algorithm  
A method of cooling including providing a fluid flow at a predetermined temperature, and adjusting at least one cooling parameter of at least one cooling device to maintain the predetermined...
US20080134703 Cooling System For Cooling Heat-Generating Installations and For Maintaining the Temperature of Closed-Off Areas at Below Cabin Temperature in an Aircraft  
In a cooling system (10) for cooling heat-generating installations (44, 46, 48) in an aircraft, with a refrigerating installation (12), at least one refrigeration consumer (44, 46, 48) and a...
US20080041081 SYSTEM AND METHOD FOR COMPRESSOR CAPACITY MODULATION IN A HEAT PUMP  
A system and method is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the...
US20150219378 VARIABLE SPEED DRIVE CONTROL FOR CHILLER COAST-THROUGH  
A chiller system includes a compressor, a condenser and an evaporator in fluid communication. A motor drives the compressor. A variable speed drive powers the motor. An oil heater and pump system...
US20150096320 HEAT PUMP DEVICE, AIR CONDITIONER, AND FREEZER  
A heat pump device includes: a compressor including a compression mechanism compressing a refrigerant and a motor driving the compression mechanism; an inverter unit applying a voltage for driving...
US20100083680 SYSTEM FOR COMPRESSOR CAPACITY MODULATION  
A system is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the compressor in an...
US20090314018 COMPRESSOR POWER CONTROL  
Cooling is provided to the power electronics of a compressor speed control system by way of refrigerant that is routed from a refrigeration system, through the power electronics, and then back to...
US20060260334 Thermostat and method for operating in either a normal or dehumidification mode  
The inventive thermostat provides for sensing the temperature and humidity within the space, and responsively controlling the operation of an air conditioning compressor and blower to maintain the...
US20060272342 Refrigeration system with parallel evaporators and variable speed compressor  
A refrigeration system for controlling airflow around an air-cooled heat generating device having a plurality of components includes a refrigerant line split into second refrigerant lines, which...
US20070144193 PRESSURE RATIO UNLOAD LOGIC FOR A COMPRESSOR  
A method is disclosed for controlling a discharge pressure of a compressor relative to a suction pressure of the compressor. The discharge pressure and suction pressure of the compressor are...
US20080307813 Variable Capacity Multiple Circuit Air Conditioning System  
A refrigerant vapor compression system for conditioning air within a climate controlled space has multiple refrigerant circuits including at least one refrigerant circuit having a fixed capacity...
US20080191587 BRUSHLESS DIRECT CURRENT MOTOR, COMPRESSOR AND AIR CONDITIONER HAVING THE SAME  
A brushless direct current motor, includes a rotor which comprises a permanent magnet, a stator which comprises coils associated with a plurality of phases which form an electrical field for...
US20080314057 Refrigerant System With Variable Speed Scroll Compressor and Economizer Circuit  
A scroll compressor system having a variable speed drive is utilized. By providing the economizer and/or bypass functions along with the variable speed drive, precise capacity adjustment between...
US20080276637 Speed Control of Multiple Components in Refrigerant Systems  
Variable speed drives are utilized in refrigerant systems to operate motors of the system components at varying speeds, typically for the purposes of capacity adjustment, efficiency enhancement,...
US20080307803 Humidity control and air conditioning  
Air conditioning systems that cool and dehumidify spaces within enclosures, buildings having such systems, and methods of controlling humidity within a space. Embodiments adjust speed of a blower...
US20080134702 Method of Preheating Inverter-Driven Compressor and Device Therefor  
To reduce a leakage current when a motor for driving a compressor is energized, with the compressor unoperated. Setting the carrier frequency of an inverter at a value lower than that used during...
US20150219379 TRANSCRITICAL REFRIGERANT VAPOR COMPRESSION SYSTEM HIGH SIDE PRESSURE CONTROL  
Operation of a transcritical refrigerant vapor compression system is controlled, when operating in a high capacity mode, through control of the refrigerant pressure in the refrigerant heat...
US20050235652 Cooling apparatus, cooling method, program, computer readable information recording medium and electronic apparatus  
A cooling apparatus of supplying driving power to a cooling element from a power supply unit, to drive it, includes a driving power changing part changing a power value of the driving power...
US20070000266 Method and system for controlling a compressor for an HVAC module  
A system for controlling a heating and cooling system for use on a work machine includes a condenser, an evaporator assembly, an electric motor driven compressor, and a master controller operable...
US20070079621 METHOD FOR CONTROLLING VARIABLE CAPACITY COMPRESSOR OF AIR CONDITIONER  
A variable capacity air conditioner compressor is controlled by setting a car target indoor temperature; sensing car indoor and outdoor temperatures and solar radiation with sensors at...
US20080223057 Refrigerant System with Pulse Width Modulated Components and Variable Speed Compressor  
A variable speed drive is provided for operating a compressor motor in a refrigerant system. When a low load situation has been determined by the refrigerant system controls, the variable speed...
US20090056354 Refrigeration power system for a storage compartment in a vehicle  
A refrigeration power system for cooling a storage compartment in a vehicle includes a power source independent of a vehicle battery. The power source provides power to a refrigeration unit that...
US20080229767 Method and Device for Controlling Refrigeration Cycle of Air conditioning System for Vehicle  
In an air conditioning system having a variable displacement compressor driven by an engine of a vehicle, method and device for controlling a refrigeration cycle are provided to ensure necessary...
US20090255278 Refrigerant System With Variable Speed Drive  
A refrigerant system (10, 100, 200) is provided with a power control system (30, 130, 230). The power control system adjusts the speed of the motors driving the refrigerant system components such...
US20080034767 Methods of Optimizing Vehicular Air Conditioning Control Systems  
Air conditioning system controls are optimized for an air conditioning system having a compressor in IC engine vehicles and in hybrid or fuel cell vehicles having electric drive motors by first...
US20070000265 Method and system for cooling a work machine compartment  
A method of controlling a heating and cooling system for providing conditioned air to a compartment of a work machine includes providing a heating, ventilation, air conditioning (HVAC) system...
US20060225444 Refrigerant system with variable speed compressor and reheat function  
Refrigerant systems are provided with selectively operable components that allow variation in the capacity provided by the refrigerant system to achieve desired temperature and humidity levels. A...
US20150198350 INTEGRATED VENTILATION UNIT  
An integrated ventilation unit configured to provide ventilation and conditioned air to an indoor space may include a heat pump system, an energy recovery device and a control unit. The heat pump...
US20080282718 Method and Apparatus of Optimizing the Cooling Load of an Economized Vapor Compression System  
A vapor compression system includes a variable speed single stage compressor, a heat rejecting heat exchanger, an expansion device, and a heat accepting heat exchanger. The speed of the compressor...
US20100300125 AUTOMOTIVE CLIMATE SYSTEM AND METHOD OF CONTROLLING SAME  
An automotive climate control system includes an evaporator, a variable speed compressor and a controller. The controller is configured to periodically alter a previous target evaporator...
US20120297807 COOLING UNIT FOR CONTAINER-TYPE DATA CENTER  
A cooling unit and cooling method are provided for a container-type data center. The cooling unit includes a heat rejection unit, for rejecting heat from coolant passing through a coolant loop to...
US20060130504 Method and apparatus for control of a variable speed compressor  
A vapor compression system includes a fluid circuit circulating a refrigerant in a closed loop. The fluid circuit has operably disposed therein, in serial order, a variable speed compressor, a...
US20080083238 Cooling System  
In order to improve a cooling system, in particular for in-transit cooling, comprising a refrigeration circuit, in which a refrigerant compressor, a high-side heat exchanger, an expansion unit and...
US20110271699 FREQUENCY VARIABLE COMPRESSOR AND CONTROL METHOD THEREOF  
The present invention discloses a frequency variable compressor, including a shell defining an airtight space, an accumulator temporarily storing refrigerant before introducing the refrigerant...
US20110138826 DISCRETE FREQUENCY OPERATION FOR UNIT CAPACITY CONTROL  
A variable speed electric drive for use in refrigerant systems includes an electric motor for driving an associated component at a variable speed that is a function of an operating frequency of...
US20060225445 Refrigerant system with variable speed compressor in tandem compressor application  
A refrigerant system is provided with tandem compressors. As is known, tandem compressors operate in parallel to provide a refrigerant system designer with the ability to achieve a stepped...
US20070144190 Refrigerator  
A refrigerator in which a two-stage-compression mode power-variable refrigerant circuit having a freezer cooler and fresh-food cooler is controlled in accordance with information on temperature in...
US20080141693 Motor-driven compressor  
A motor-driven compressor includes a compression mechanism for compressing a refrigerant gas, an electric motor, an inverter assembly and an inverter chamber. The electric motor drives the...
US20130145787 SCREW COMPRESSOR DRIVE CONTROL  
An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the...
US20110048046 CONTROL SYSTEM  
A system for controlling a centrifugal gas compressor (108) in an HVAC, refrigeration or liquid chiller system (100) in which flow of gas through the compressor is automatically controlled to...
US20150135754 REFRIGERATING DEVICE  
A refrigerating device includes a refrigerant circuit, a temperature detecting unit, a protection control section, and a determination temperature modifying section. The refrigerant circuit...
US20100229580 VARIABLE SPEED DRIVE  
Systems and methods for improved Variable Speed Drives are provided. One embodiment relates to apparatus for common mode and differential mode filtering for motor or compressor bearing protection...
US20100175402 ELECTRONIC REFRIGERATION CONTROL SYSTEM INCLUDING A VARIABLE SPEED COMPRESSOR  
A refrigerator is provided having a refrigeration system including a variable speed compressor, a condenser, a condenser fan, an evaporator, a variable speed evaporator fan. The refrigerator...
US20150204567 HVAC CONTROLLER AND METHOD FOR OPERATING AN HVAC SYSTEM BASED ON A DIFFERENCE IN TEMPERATURE BETWEEN RETURN AIR AND SUPPLY AIR AND AN HVAC SYSTEM EMPLOYING THE CONTROLLER OR METHOD  
The disclosure provides an HVAC system, an HVAC controller and a method of operating an HVAC system. In one embodiment, the HVAC controller includes: (1) an interface configured to receive a...
US20100236265 AIR CONDITIONER FOR VEHICLE  
An air conditioner for a vehicle comprises a refrigeration cycle including a variable displacement compressor for refrigerant which uses an engine as a drive source, a condenser, and an...
US20150204594 AIR CONDITION SYSTEM, METHOD FOR CONTROLLING AIR CONDITION SYSTEM, AND OUTDOOR APPARATUS OF AIR CONDITION SYSTEM  
An air conditioning system, an outdoor apparatus of an air conditioning system and a method for controlling an air conditioning system are provided. The air conditioning system includes: an indoor...
US20150204593 SYSTEM AND METHOD FOR CONTROLLING AN AIR CONDITIONING SYSTEM AND AN OUTDOOR APPARATUS OF THE SYSTEM  
A method for controlling an air conditioning system, an outdoor apparatus of an air conditioning system and an air conditioning system are provided. The method includes: obtaining a working mode...
US20100281898 APPARATUS AND METHOD FOR CONTROLLING OPERATION OF COMPRESSOR  
An apparatus and method for controlling an operation of a compressor are disclosed to enhance a compressor efficiency in each operation mode in operating a compressor in a power mode or power...

Matches 1 - 50 out of 60 1 2 >