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8181473 |
Refrigeration cycle device, and air conditioner for vehicle
In a refrigeration cycle device in which a compressor is driven by power transmitted from an engine, a torque limiter is adapted to interrupt a transmission of the power from the engine to the...
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8156751 |
Control and protection system for a variable capacity compressor
A system includes a power source, a compressor that operates in a reduced-capacity mode and a full-capacity mode, and an actuation assembly that modulates the compressor between the...
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8117859 |
Methods and systems for controlling air conditioning systems having a cooling mode and a free-cooling mode
An air conditioning system having a cooling mode and a free-cooling mode. The system having a refrigeration circuit having a compressor and a pump; a suction pressure sensor for measuring a suction...
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8109105 |
Refrigerating air conditioning system, method of controlling operation of refrigerating air conditioning system, and method of controlling amount of refrigerant in refrigerating air conditioning system
In a refrigerating air conditioning system using refrigerant such as CO2 used in a supercritical area, a highly efficient refrigerating air conditioning system is provided by adjusting the amount...
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8082747 |
Temperature control through pulse width modulation
A refrigerant compressor assembly for a refrigeration circuit controls the temperature within a temperature controlled space. The refrigerant compressor assembly includes a first unloading valve, a...
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RE42966 |
Tandem compressors with discharge valve on connecting lines
A refrigerant cycle is disclosed having a number of compressors operating in tandem and supplying a compressed refrigerant to a refrigerant system. Discharge lines communicate a compressed...
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8047012 |
Refrigeration system and method using multiple variable capacity devices
A system and method of controlling a compressor rack having a plurality of variable capacity components is provided. A variable capacity component is selected from the plurality of variable...
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8042347 |
Compressor inlet pressure estimation apparatus for refrigeration cycle system
A compressor inlet pressure estimation apparatus for a refrigeration cycle system is disclosed. An electronic control unit 14 uses Tefin_lag(N) as an actual corrected temperature Tefin_AD(N) during...
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8037710 |
Compressor with vapor injection system
A heat pump system includes a first heat exchanger, a second heat exchanger in fluid communication with the first heat exchanger, a scroll compressor in fluid communication with each of the first...
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8020389 |
Energy-saving climatic test chamber and method of operation
Climatic test chamber (10) for carrying out a sequence of specified test cycles and cooled by means of at least a refrigerating circuit (100, 200, 410) including a variable-speed compressor (120,...
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8011199 |
HVAC control using discrete-speed thermostats and run times
Methods of controlling air conditioning and HVAC units using a thermostat for a discrete-speed unit that include changing speed based on how long the unit operates at a particular speed. Speed may...
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7992399 |
Pressure equalization component for a compressor
A system to equalize pressure connected to a compressor for use in HVAC&R system is provided. The system includes a component in fluid communication between a high pressure side and an intermediate...
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7984617 |
Method of controlling compressor for refrigerator and apparatus thereof
A method of controlling compressor for refrigerator and apparatus thereof are disclosed to control an operation of the compressor by optimum efficiency by changing freezing capacity of the...
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7975497 |
Refrigeration unit having variable performance compressor operated based on high-pressure side pressure
In a refrigeration unit including a variable performance compressor driven by an inverter motor, a sensor is configured to detect a physical amount corresponding to a refrigerant pressure on the...
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7971442 |
Method for controlling air conditioner of vehicles
The present invention relates to a method for controlling a vehicle air-conditioner, which can prevent undershoot of an evaporator by performing a maximum capacity control or controlling an...
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7921661 |
Dehumidification system with multiple condensers and compound compressor
A refrigerant cycle is provided with a multi-port compressor or compressor stages connected in series, and multiple condensers. A single evaporator communicates with the plurality of condensers. At...
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7905102 |
Control system
A stability control algorithm is provided for a centrifugal compressor. The stability control algorithm is used to control a variable geometry diffuser and a hot gas bypass valve (when provided) in...
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7905103 |
Model prediction controlled refrigeration system
The invention provides a refrigeration system with a compressing unit, and a method of controlling a refrigeration system. To facilitate a better control, the capacity of the compressing unit is...
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7878006 |
Compressor diagnostic and protection system and method
A system and method includes a compressor operable in a refrigeration circuit and including a motor, a current sensor detecting current supplied to the motor, a discharge line temperature sensor...
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7878014 |
Parallel condensing unit control system and method
A refrigeration system comprises a plurality of compressors and a plurality of condensing units comprising a first condensing unit having a first control module and at least one additional...
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7854138 |
Method for controlling multi-unit air conditioning system
A method for controlling a multi-unit air conditioning system adapted to cool or heat room spaces while passing a refrigerant in one direction or in a reverse direction is disclosed. In the method,...
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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...
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7836715 |
Air conditioner control logic for compressor noise and torque management
An air conditioner has a controller that controls the operation of a refrigerant circuit that has a compressor, a condenser, an expansion valve or orifice tube, and an evaporator. The condenser...
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7814758 |
Refrigeration system controller and method
A system and method of controlling components of a refrigeration system includes determining a desired rate of change of a refrigeration system operating parameter, using historical data to predict...
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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...
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7775059 |
Air conditioner
An air conditioner includes a fixed displacement-type first compression mechanism and a variable displacement-type second compression mechanism independent from each other in a refrigeration cycle,...
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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...
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7757505 |
Predictive capacity systems and methods for commercial refrigeration
A system and method in a commercial refrigeration system for compensating for events. A commercial refrigeration system includes a controller that predicts a first change in cooling capacity...
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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...
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7730733 |
Apparatus and method of summing capacities of outdoor units in multiple air conditioner
An apparatus for summing capacities of outdoor units in a multiple air conditioner comprises self-capacity storage devices mounted in outdoor units, respectively, for storing self-capacities of the...
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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,...
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7690211 |
Refrigerating apparatus
To provide a refrigerating apparatus that can control the supercooling degree of liquid refrigerant irrespective of changes in circulating refrigerant amounts in a refrigeration cycle, a...
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7684180 |
Computer system with vibration absorbing cage
An exemplary computer system includes an enclosure, a cage, a plurality of floppy disk drives, hard disk drives, and optical disk drives received, a system power supply, and a plurality of...
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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...
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7645125 |
Refrigerant compressor with improved oil retention
A variable capacity automotive refrigerant compressor is provided with a pressure equalization passage between the crankcase volume and the suction passage in the manifold to prevent a pressure...
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7624583 |
Freezer device
A refrigeration system comprises a refrigerant circuit (10) in which a compressor (21), an outdoor heat exchanger (24) and an indoor heat exchanger (33) are connected to operate on a refrigeration...
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7617695 |
Control method for variable capacity compressors
A refrigeration system including a refrigeration circuit and a controller. The refrigeration circuit includes a plurality of variable capacity compressors arranged in parallel to compress a...
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7607311 |
Method for controlling amount of refrigerant of dual type unitary air conditioner
A method for controlling the amount of a refrigerant of a dual type unitary air conditioner, which has a plurality of centralized warm and cold air circulators and at least one individual warm and...
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7574872 |
Capacity-variable air conditioner
A capacity-variable air conditioner is capable of controlling capacity and consumed electricity in response to operation mode. The refrigerant compression quantity of a compressor is variably...
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7562698 |
Vehicular air-conditioning system
An air-conditioning system for a vehicle having an engine adapted to stop idling on predetermined stop conditions of the vehicle, which system comprises an electric motor for driving a refrigerant...
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7555913 |
Method for controlling multiple compressors according to a matrix
A method for controlling multiple compressors for use in an airconditioner is disclosed. In the airconditioner having N compressors, the method sequentially and equally operates the N compressors...
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7513123 |
Unitary air conditioner and method of controlling variable operation thereof
A unitary air conditioner comprises a 1-stage thermostat mounted in a room for generating an air conditioner ON/OFF signal, an indoor unit configured to operate based on a signal from the 1-stage...
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7484376 |
Compressor diagnostic and protection system and method
A system and method includes a compressor, a motor drivingly connected to the compressor, a current sensor detecting current supplied to the motor, a discharge line temperature sensor detecting...
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7478537 |
Method of controlling vehicular air-conditioner
A vehicular air-conditioner includes a compressor to be driven by an engine. The vehicular air-conditioner includes a controller configured to reduce a load on the compressor in response to a...
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7472559 |
Method for controlling air conditioner
Disclosed is a method for controlling an air conditioner. In particular, driving modes of elements, namely sucking/discharge compressure, of the compressor in operation are determined so that...
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7458227 |
Method of preventing rapid on/off of compressor in unitary air conditioner
A method of preventing rapid on/off of a compressor in a unitary air conditioner comprises the steps of, when a unitary-capacity operation signal is inputted from a thermostat to start an outdoor...
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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...
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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...
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7426836 |
Method and apparatus for air conditioning using a primary and an ancillary power source
A method for air conditioning using a primary power source augmented with an ancillary power source which is accomplished by receiving a heat-laden first working fluid at an initial pressure;...
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7421853 |
Enhanced manual start/stop sequencing controls for a stream turbine powered chiller unit
A control system and method for interactive startup and shutdown of a steam turbine driven chiller unit is provided. The chiller unit includes an integrated central control panel to control...
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