Matches 1 - 50 out of 286 1 2 3 4 5 6 >
Match Document Document Title
7389649 Cooling system with variable duty cycle capacity control  
A control system for a cooling system includes a first sensor for sensing a property indicative of demand for cooling and a controller coupled to the sensor. The controller produces the variable...
7377450 Control of multi-zone and multi-stage HVAC system  
A control for controlling a multi-zone HVAC system, wherein the heating or cooling equipment is operable in multiple stages, takes the demand on the system over time into account when determining...
RE40257 Compressor pulse width modulation  
A scroll compressor includes a capacity modulation system. The capacity modulation system has a piston that is connected to the non-orbiting scroll that disengages the non-orbiting scroll from the...
7356999 System and method for stability control in a centrifugal compressor  
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...
7347056 Vehicle air-conditioning system  
A vehicle air-conditioning system provided with a refrigeration cycle system is provided. The air-conditioning system includes an evaporator outlet air target temperature setting unit which sets...
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...
7261151 Suction line heat exchanger for CO2 cooling system  
A heat exchanger including a suction line for gaseous or two phase refrigerant output from an evaporator and a capillary tube carrying cooled refrigerant to the evaporator. The suction line...
7260949 Compressor variable dryer system  
A dryer assembly for drying compressed fluid received from a fluid compressor. The dryer assembly comprises a compressed fluid circuit and a refrigeration circuit associated with the compressed...
7243503 Method for controlling operation of air conditioner  
A method for controlling an operation of an air conditioner having an inverter compressor and a regular velocity compressor includes: setting an upper limit threshold and a lower limit threshold...
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...
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...
7213404 Method for controlling operation of air conditioning system  
A method for controlling the operation of an air conditioning system, including the steps of operating the air conditioning system until a frequency of a compressor reaches to a preset target...
7165411 Control logic for HVAC heat 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...
7155928 Refrigerating apparatus  
In a refrigerating apparatus in which a plurality of application-side heat exchangers ( 41, 45, 51 ) are connected to a heat-source side heat exchanger ( 4 ), liquid lines for a plurality of...
7143595 Supercritical refrigerant cycle system  
An object of the present invention is to improve a heat exchanging capability in an evaporator in a refrigerant cycle system in which a high pressure side is operated at a supercritical pressure....
7137265 Apparatus and method for controlling oil of air conditioner  
An apparatus and a method for controlling oil of a multi-compressor installed in an air conditioner includes a microcomputer for sequentially stopping compressors installed in the air conditioner...
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...
7107776 Air conditioning system for vehicle  
An air conditioning system includes a primary or engine-driven compressor that is driven by a primary driving source or engine, and a secondary or motor-driven compressor that is driven by a...
7100387 Method for controlling a multiple cooling compartment refrigerator, and refrigerator using such method  
A method for controlling a refrigerator having a variable speed compressor and at least two compartments (FR, FZ) cooled to respective temperatures and comprising sensor devices (T R , T Z ) for...
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...
7086244 Refrigerant cycle apparatus  
An object of the present invention is to provide a refrigerant cycle apparatus which can reduce a production cost while hastening equalization of pressure in a refrigerant circuit after a...
7040107 Air conditioner and method of controlling the same  
An air conditioner has a variable capacity rotary compressor, which allows the compressor to be smoothly re-started, thus increasing start reliability of the compressor. The air conditioner...
7040103 Cooling system, a cooler and a method for controlling a compressor  
A cooling system comprising a compressor ( 20 ) and controlled by means of an electronic circuit (TE), the electronic circuit (TE) comprising a measuring circuit (ME) for measuring an electric...
7036329 Lowering of refrigerant emissions by cycling of a variable displacement compressor  
In order to reduce refrigerant leakage from an automotive air conditioning system, the leakage paths are kept sealed by automatically reducing the output of a variable displacement compressor ( 12...
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...
7025572 Compressor with integral control unit  
A compressor for a vehicle air conditioner includes a pressure sensor and a torque computing unit for computing the compressor torque. The compressor also has a communication unit that allows data...
7003968 Motor vehicle air-conditioning installation equipped with an electronic control device  
The invention proposes an air conditioning installation furnished with an injection computer ( 42 ), with an air conditioning apparatus and with an electronic control device ( 401 ). The...
6997003 Method to control high condenser pressure  
A method for controlling load capacity in an air conditioning unit comprising the steps of initializing a saturated condensing temperature upper bound (SCT_UP), comparing a saturated condensing...
6997002 Air conditioning unit and method of operating the same  
Disclosed herein is an air conditioning unit and method of operating the same. The air conditioning unit has a power level control unit ( 6 ) for controlling the level of power supplied to a motor...
6997001 Method of operating a refrigeration cycle  
The object of the present invention is to provide a method of operating a refrigeration cycle which is capable of preventing oil from staying in an evaporator and ensures high coefficient of...
6978632 Air conditioning system for vehicles  
An air conditioning system for a vehicle includes a hybrid compressor having a first compression mechanism driven by a drive source for driving the vehicle and a second compression mechanism driven...
6973798 Air conditioning system for vehicle  
An air conditioning system 1 includes a primary compressor (an engine-driven compressor 6 ) driven by a primary driving source (an engine 2 ) and a secondary compressor (a motor-driven...
6966195 Air conditioning system  
To provide an air conditioning system which simultaneously eliminates shortage of lubricating oil of a variable displacement compressor and degradation of cooling efficiency of the system. An air...
6966192 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...
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...
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...
6945074 Vapor-compression refrigerant cycle system  
In a vapor-compression refrigerant cycle system, a switching device is provided to switch one of a first mode where high-pressure refrigerant discharged from a compressor is directly introduced to...
6945062 Heat pump water heating system including a compressor having a variable clearance volume  
A heat pump water heater system includes a compressor that has a variable clearance volume that can be selectively controlled to control the mass flow rate of refrigerant from the compressor. Under...
6939112 Variable displacement compressors  
A variable displacement compressor includes a suction chamber, a discharge chamber, and a crank chamber. The compressor also includes a first path for allowing communication between the crank...
6938430 Refrigerating device  
A refrigerating apparatus including three compressors ( 2 A, 2 B, 2 C) and application side heat exchangers ( 41 ) ( 45, 51 ) for two channels is formed so that a first compressor ( 2 A) is used...
6931867 Cooling system with isolation valve  
A cooling system including a pulse-width modulated variable capacity compressor operable between on-cycles and off-cycles, and in electrical communication with the compressor and operable to...
6925823 Refrigerant cycle with operating range extension  
A refrigerant cycle is provided with a control that monitors system conditions such as current, voltage or temperature at a compressor motor or refrigerant state conditions at compressor ports. A...
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...
6910344 Compressor torque estimate device, engine controller and method of estimating compressor torque  
A compressor torque estimate device is used for a variable displacement compressor whose displacement is variable based on a compressor control signal for estimating a compressor torque of the...
6895769 Air conditioning apparatus using supercritical refrigerant for vehicle  
An air conditioning apparatus includes a refrigerating cycle supplying the supercritical refrigerant pressurized by the variable displacement compressor to the outdoor heat exchanger, the expansion...
6892549 Vehicle air conditioner  
In a vehicle air conditioner, a compressor is driven by a vehicle engine, and a displacement of the compressor is controlled based on a cooling load. When a post-evaporator air temperature (TE) is...
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...
6889516 Cooling system for motor and cooling control method  
A cooling system for a motor is prevented from exhibiting a thermal fatigue failure due to a temperature cycle. The operation or stopping of the cooling motor fan 6 of the forced cooling system...
6889512 On-vehicle air conditioner  
The present invention concerns an on-vehicle air-conditioner, resolving problems of the prior art, and allowing to perform cooling, heating, dehumidification or others efficiently even for vehicles...
6886355 Air-conditioning system  
An air-conditioning system with a refrigerant medium circulating in a refrigerant loop has a variable-stroke compressor with a high-pressure outlet chamber, a drive chamber and an intake suction...
Matches 1 - 50 out of 286 1 2 3 4 5 6 >