Matches 101 - 150 out of 304 < 1 2 3 4 5 6 7 >
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6681587 Flow restricting structure in displacement controlling mechanism of variable displacement compressor  
A variable displacement compressor includes a housing assembly having a control pressure chamber. A drive shaft is rotatably supported by the housing assembly. Cylinder bores, each accommodating a...
6679074 Automatic switching refrigeration system  
A method of operating a refrigeration system having a discharge port that guides conditioned air from the system to a conditioned space and a return port that guides air from the conditioned space...
6679320 Vehicle air conditioning circuit using a refrigerant fluid in the supercritical state  
Refrigerant fluid such as CO 2 , compressed to the supercritical pressure by a compressor, is delivered selectively through a three-way valve, either into a branch of the circuit containing a...
6675595 Refrigerant cycle system including two evaporators  
A refrigerant cycle system includes a variable displacement compressor, and first and second evaporators disposed in parallel. In the refrigerant cycle system, it is determined whether a...
6662578 Refrigeration system and method for controlling defrost  
A refrigeration system and method for controlling defrost includes a refrigeration case, an evaporator disposed in the refrigeration case, and a condenser and compressor coupled in fluid...
6663356 Control valve for variable displacement type compressor  
A control valve is used for a variable displacement compressor. The compressor has a crank chamber and a bleed passage. The control valve includes a valve housing. A valve chamber is defined in the...
6644055 Vehicle air conditioning system  
A vehicle air conditioning system mountable on a vehicle has the control function of stopping a vehicle engine automatically when the vehicle stops (eco-run vehicle). The system includes a variable...
6640562 Air-conditioning system for vehicle and its control method  
An air-conditioning system for a vehicle including a refrigerant circuit and an engine, has a compressor in the refrigerant circuit, a battery, an electric motor and a mechanism operative to...
6638026 Control valve for variable displacement compressor  
A control valve has a valve housing. A valve chamber and a pressure sensing chamber are defined in the valve housing, respectively. A pressure sensing member is located in the pressure sensing...
6619061 Self-tuning pull-down fuzzy logic temperature control for refrigeration systems  
A pull-down control algorithm for an HVAC refrigeration system is provided. The control algorithm utilizes a fuzzy logic methodology to automatically adjust a flow of refrigerant in the system...
6619062 Scroll compressor and air conditioner  
A scroll compressor comprises an operating state detection part ( 27 ) detecting an operating state, a variable-speed motor ( 28 ), a control part ( 26 ) and an unloading mechanism ( 12 ) serving...
6595024 Expressor capacity control  
Saturated or sub-cooled liquid is supplied to the expander of an expressor. Starting just prior to the end of the inlet process or just after the completion of the inlet process, high pressure...
6589020 Control valve for variable displacement compressor  
A control valve used for a variable displacement type compressor. The compressor has a crank chamber, a discharge pressure zone, and a supply passage. The supply passage connects the crank chamber...
6584791 Pressure equalization system and method  
A pressure equalization method and system is provided for starting a compressor while maintaining the compressor at a high pressure and comprises a valve and a bleed port. The compressor has a...
6571576 Injection of liquid and vapor refrigerant through economizer ports  
An improved apparatus and method for injecting a liquid/vapor into compression chambers at an intermediate pressure utilizes the economizer injection ports already found in the compressor. By...
6546742 Displacement control method and apparatus for variable displacement compressor  
A displacement control device comprises a control valve. The control valve controls the pressure in a crank chamber. The control valve includes a valve body, and an electromagnetic actuator. A...
6537037 Variable displacement compressor and air conditioning apparatus  
A variable displacement compressor is operated efficiently by avoiding inefficient conditions. The compressor varies its displacement using a control valve for which an external duty control...
6526771 Freezing cycle apparatus  
In a freezing cycle apparatus that switches between a cooling mode and a heating mode, wherein a low-pressure refrigerant is evaporated in an evaporator 18 for cooling the air during a cooling...
6519958 Control system for starting of air conditioner and control method thereof  
A system includes a compressor and an expansion valve. The exit side of the compressor and the inlet side of the expansion valve are connected by a high pressure conduit, and the exit side of the...
6517323 Displacement control mechanism for variable displacement type compressor  
A displacement control mechanism used for compressor is installed in a refrigerant circuit. The compressor has a bleed passage and a supply passage. The displacement control mechanism includes a...
6505476 Refrigerant cycle system with super-critical refrigerant pressure  
In a refrigerant cycle system, a control unit controls both a refrigerant amount discharged from a compressor and an opening degree of a pressure control valve so that theoretical efficiency of a...
6484520 Displacement control apparatus for variable displacement compressor, displacement control method and compressor module  
A displacement control apparatus controls the displacement of a variable displacement controller. A drive shaft of the compressor is driven by an engine. Torque acting on the drive shaft represents...
6484523 Vehicle air conditioner with refrigerant flow-amount control of compressor  
In a vehicle air conditioner having a refrigerant cycle using carbon dioxide as refrigerant, a displacement of a compressor is changed and controlled, so that an air temperature immediately after...
6481225 Air conditioning apparatus for vehicle and its control method  
A vehicle air conditioning apparatus includes a refrigerant circuit. The air conditioning apparatus is driven by an engine. The air conditioning apparatus includes a variable displacement...
6474083 Variable displacement compressor with capacity control device  
A capacity control device controls a discharge capacity of a variable displacement compressor for use in an automotive air conditioning system. The air conditioning system has the compressor and an...
6460357 Two-evaporator refrigerator having a bypass and channel-switching means for refrigerant  
A refrigerator has a two-stage compressor and means for switching refrigerant flow between a primary channel and a bypassing channel at downstream of a condenser that is connected with an outlet of...
6457319 Air conditioner and control valve in variable displacement compressor  
A control valve controls the pressure in a crank chamber of a compressor to change the displacement of the compressor. The compressor includes a discharge chamber, a suction chamber and a supply...
6453691 Air conditioner with a pressure regulation device and method for controlling the same  
Disclosed herewith is an air conditioner with a pressure regulation device. The air conditioner controls the number of operated compressors according to load. The air conditioner includes a...
6446451 Variable capacity compressor having adjustable crankpin throw structure  
A two-stage reciprocating compressor is provided. The compressor includes a block with a single cylinder and associated single compression chamber and single piston. The compressor further includes...
6434957 Operation control method for air conditioning system and air conditioning system  
It is an object of the present invention to provide an operation control method of an air-conditioning apparatus and an air-conditioning apparatus that prevent a plurality of air-conditioning...
6412293 Scroll machine with continuous capacity modulation  
An improved continuous capacity modulation system for scroll-type compressors is disclosed in which a valve body of a solenoid valve assembly is secured to the inner wall of the hermetic shell and...
6408635 Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor  
A control for a refrigeration system serviced by a special pulse width modulated compressor coupled to a condenser and evaporator. The system can be of the distributed type wherein the condenser...
6381971 Air conditioning system with compressor protection  
An air conditioning system includes compressor protective means for protecting a compressor. The compressor protective means includes first and second protective values. The first protective value...
6367272 Compressor capacity control system and method  
An apparatus and system for manipulating the air temperature within an interior compartment of a vehicle, the apparatus and system includes a HVAC system and an operating system. A compressor...
6367270 Vehicle air-conditioning system  
The present invention balances power consumption reduction and a cooling in a vehicle air-conditioning system having a compressor selectively driven by a vehicle engine or a motor while the...
6358016 Displacement control device and displacement control method for variable displacement compressor  
A controller normally supplies current the magnitude of which corresponds to a required cooling performance of a refrigeration circuit to a displacement control valve. As a result the compressor...
6321550 Start up control for a transport refrigeration unit with synchronous generator power system  
A transport refrigeration system includes a compressor having discharge and suction ports and at least one electric compressor drive motor disposed within the compressor. The system includes a...
6293116 Humidity control method for a variable capacity vehicle climate control system  
An improved vehicle climate control system in which the passenger compartment temperature and humidity are controlled without requiring a humidity sensor. The control is based on the recognition...
6293117 Air conditioning system  
An air conditioning system includes an compressor 110 having a driving chamber 110, a suction port 116 and a discharge port 121, a first passage 107 that connects the discharge port 121 to the...
6279331 Vehicular refrigerating cycle with a bypass line  
A vehicular refrigerating cycle with a by-pass line is provided, whereby even in an environment of extremely low temperature with the refrigerating cycle left at rest after being operated in...
6263687 Air conditioning systems  
An air conditioning system 100 may include a compressor 101 having a driving chamber 110, a cooling circuit 151, a heating circuit 152 and capacity controllers 301, 401. The compressor 101 may have...
6260369 Flow control valve for a variable displacement refrigerant compressor  
The flow control valve used in a variable displacement refrigerant compressor, which is incorporated in a refrigerating system, and arranged in a controlling passage fluidly interconnecting between...
6250093 Air conditioning system and compressor  
An improved air conditioning system that cools or heats air very rapidly after being started. The system includes a main heater and a cooler which also functions as an auxially heater. The cooler...
6247900 Stroke sensing apparatus for a variable displacement compressor  
An accurate and low cost sensing apparatus for a swash or wobble plate compressor that requires no modifications in compressor design or operation, and which provides a repeatable and accurate...
6240737 Solar-powered refrigerator  
A solar-powered refrigerator which includes a switch operable to independently regulate supply of an electric current to one or more variable-speed compressors, each of the variable-speed...
6233957 Vehicular air conditioner  
A vehicular air conditioner which is not influenced by fluctuations in engine RPM and which provides air conditioning with low energy consumption includes a variable demand capacity compressor...
6230507 Hybrid compressor and control method  
A hybrid compressor selectively driven by an engine and an electric motor. The hybrid compressor includes a variable displacement compression mechanism. When the compression mechanism is driven by...
6192700 Air conditioning system for a motor vehicle  
An air conditioning system for a passenger compartment of a motor vehicle comprises a first heat exchanger (14) positionable outside the passenger compartment; a second heat exchanger (18)...
6189325 Air conditioning system for a motor vehicle  
An air conditioning system (10) for a passenger compartment of a motor vehicle having a windscreen comprises a first heat exchanger (14) positionable outside the passenger compartment; a second...
6185946 System for sequencing chillers in a loop cooling plant and other systems that employ all variable-speed units  
Methods of sequencing parallel units in HVAC systems are described to improve overall system operating efficiency. The improved method is applicable for sequencing parallel centrifugal pumps in a...
Matches 101 - 150 out of 304 < 1 2 3 4 5 6 7 >