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7610765 |
Refrigerant charge status indication method and device
A method and apparatus for determining the sufficiency of the refrigerant charge in an air conditioning system by use of temperature measurements. The temperature of the liquid refrigerant leaving...
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7607313 |
Vehicle HVAC system
A HVAC system and method for a vehicle is disclosed. The air conditioning portion of the HVAC system may be able to store and release refrigerant in charge bottle while operating in an air...
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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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7594407 |
Monitoring refrigerant in a refrigeration system
A method for monitoring refrigerant in a refrigeration system includes calculating a saturation temperature of refrigerant in a refrigeration system based on at least one of a discharge pressure...
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7552596 |
Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication
The sufficiency of refrigerant charge in an air conditioning system is determined by a comparison of two sensed temperatures in the system, one being the liquid line temperature and the other being...
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7500368 |
System and method for verifying proper refrigerant and airflow for air conditioners and heat pumps in cooling mode
An apparatus for the diagnosis of a cooling system which receives inputs in the form of data about a cooling system, and measurements made from the cooling system, and which then calculates the...
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7497091 |
Refrigeration device
Disposed is a contaminant recovery receptacle ( 40 ) which is connected, through an inflow pipe ( 42 ) and an outflow pipe ( 43 ), to the suction side of a compressor ( 21 ). The inflow pipe ( 42 )...
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7493773 |
Refrigerant monitoring system and method
A system for monitoring the amount of refrigerant supplied from a refrigerant tank to a plurality of refrigerant systems comprising a tank valve for connection to a refrigerant tank at a...
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7478538 |
Refrigerant containment vessel with thermal inertia and method of use
A vapor compression system including a closed fluid circuit having operably coupled thereto, in serial order, a compressor, a first heat exchanger, an expansion device, a second heat exchanger and...
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7462215 |
Very thin profile filter with large filter media area
An extremely thin profile filter is sized and configured to be installed between tubing couplers of an automotive air conditioning system in regions of an engine compartment that are cramped or...
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7421848 |
Automated hose clearing after refrigerant charging method
An automated hose clearing after refrigerant charge method and appropriate apparatus is provided. The method includes detecting a pressure differential between the interiors of a high and low...
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7386985 |
Detection of refrigerant charge adequacy based on multiple temperature measurements
The refrigerant charge adequacy of an air conditioning system is determined by the sensing of two temperatures in the system, one being at a midpoint in a condenser coil and the other being the...
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7386987 |
Refrigerant relief device
To provide a refrigerant relief device which releases refrigerant in a refrigeration cycle to the outside of a vehicle compartment, when the refrigerant releases into the vehicle compartment, or...
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7380404 |
Method and control for determining low refrigerant charge
A refrigerant system is provided with a method and a control programmed to perform the method, in which a low charge of refrigerant is identified. The mass flow of refrigerant through the system is...
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7377118 |
Refrigerant tracking/leak detection system and method
A refrigeration system includes a heat exchanger that is operable to cool a flow of compressed refrigerant and a first sensor coupled to the heat exchanger and operable to generate a first signal...
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7370483 |
Refrigerant cycle with three-way service valve for environmentally friendly refrigerant
A refrigerant cycle is provided with a single three-way service valve that is utilized for draining and adding refrigerant. In the prior art, a second two-way valve was used in combination with the...
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7357150 |
Safety shut-off device
A safety shut-off device for sections of fluid circuits, which in case of damage or the like, have to shut off from each other on safety considerations. The safety shut-off device includes at least...
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7343750 |
Diagnosing a loss of refrigerant charge in a refrigerant system
A refrigerant system has a controller associated with it that determines an equilibrium pressure when the system is inactive. The controller determines if the equilibrium pressure differs from an...
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7337619 |
Method and system for assessing a refrigerant charge level in a vehicle air conditioning system
A method and system for assessing a level of refrigerant in a vehicle air conditioning system. A refrigerant charge value is determined as a function of ambient air temperature, ambient air...
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7310956 |
Refrigerant charging by optimum performance
A charging system for charging a refrigeration system of a vehicle includes a controller, a refrigerant source, at least one line fluidly connecting the refrigerant source to the refrigeration...
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7293419 |
Refrigerant transfer system and method
A refrigerant recovery/recycling system includes a source container fluidly connected to a recovery/recycling device via a vaporizer. Liquid refrigerant is introduced into the vaporizer via the...
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7275383 |
Device for measuring pressure in automobile air conditioner and charging same with refrigerant and method of same
A portable device for measuring the refrigerant pressure in an automobile air conditioning system and, if needed, charging the system with additional refrigerant, is provided. An actuator is...
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7254954 |
Refrigerant charging system and method using cartridges and scale
A refrigerant charging system and method for charging a refrigeration system with refrigerant includes a refrigerant source, one or more cartridges, an input line, an output line, and a scale...
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7237394 |
Charge management for 100% heat recovery units
An apparatus for managing refrigerant charge in an air conditioning unit comprising a cooling circuit through which a refrigerant flows from a compressor, through a condenser, and through an...
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7174742 |
Combined method and apparatus for recovering and reclaiming refrigerant, solvent flushing, and refrigerant recharging
A method and apparatus ( 10 ) for servicing refrigeration system ( 12 ) which provides a single device for recovering and reclaiming refrigerant, flushing the refrigerant system with solvent, and...
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7168256 |
Apparatus and method for recovery and recycle of optical fiber coolant gas
An apparatus and method for recovering and recycling a coolant gas from a heat exchanger. The apparatus comprises a coolant gas recovery section, and analysis section, and a coolant gas blending...
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7146819 |
Method of monitoring refrigerant level
The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on...
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7127901 |
Helium management control system
A helium management control system for controlling the helium refrigerant supply from a common manifold supplies a plurality of cryogenic refrigerators with an appropriate helium supply. The system...
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7117688 |
Refrigeration device
The present invention allows an optimal quantity of refrigerant to be quickly and easily charged into the refrigeration device. In a refrigeration device that includes a refrigerant cycle circuit...
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7104075 |
Arrangement and method for controlling the discharge of carbon dioxide for air conditioning systems
A method and system for discharging refrigerant, such as carbon dioxide, from an air conditioning system. The discharge rate of the refrigerant from the air conditioning system is controlled by a...
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7096679 |
Transcritical vapor compression system and method of operating including refrigerant storage tank and non-variable expansion device
A transcritical 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 compressor, a first...
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7093451 |
Blowoff valve assembly with integrated pressure switch
A blowoff valve assembly includes a diaphragm separating a refrigerant connection from an ambient port open to the atmosphere. The refrigerant connection is preferably connected to air conditioning...
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7086237 |
Method and apparatus to measure and transfer liquefied refrigerant in a refrigeration system
A method, system and apparatus for transferring a measured level of liquefied refrigerant to a refrigeration system includes the steps of purging a calibration container; filling the calibration...
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7086238 |
Oil separator with bi-directional valve mechanism for use with a refrigerant recycling machine
An automotive air conditioning refrigerant recycling system incorporates an improved upstream oil separator that removes virtually all contaminating lubricants from a refrigerant stream before the...
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7051547 |
Air conditioning system for a motor vehicle
The invention relates to an air conditioning system for motor vehicles, which contains a connection piece for a pressure switch/pressure sensor, said connection piece being suitable for evacuating...
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7033508 |
Contaminant flushing device, system, and method, particularly suited for refrigeration system servicing
Fluid decontamination device includes a base having a fluid passage in it. An observation window is provided in the base for allowing a user to observe a fluid in the fluid passage. A differential...
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7021069 |
Multiple refrigerating device
A multi-type refrigerator is capable of achieving a high coefficient of performance (COP) while using R32 as refrigerant and that takes account of energy saving and global warming. Refrigerating...
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7010927 |
Refrigerant system with controlled refrigerant charge amount
An air conditioning system includes a supplemental storage container that allows for transferring refrigerant into or out of an air conditioning or refrigeration system based upon different...
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6996998 |
Refrigerant system pressure control for storage and transportation
An air conditioning or refrigeration system includes an attached refrigerant receptacle associated with the system. During shipment or storage, the pressure within the system may exceed a selected...
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6981384 |
Monitoring refrigerant charge
An air conditioning, heating or refrigeration system includes a controller that automatically determines if refrigerant amount is above or below the desired amount within the system. In one...
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6981511 |
Method and apparatus for servicing a pressurized system
A method and apparatus for servicing a pressurized system is described. A purge fitting can be used to vent the pressurized system. Venting can release a gas, such as air, from the system. The...
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6968706 |
HVAC system with refrigerant venting
Each blow-off valve includes a valve body with a first movable wall defining a portion of the liquid fluid passage therein and a second movable wall defining a portion of the suction fluid passage...
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6959557 |
Apparatus for the storage and controlled delivery of fluids
A vessel for containing a refrigerant fluid in a vapor compression system. The vessel includes a housing defining a fixed interior volume and an internal structure subdividing the interior volume...
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6952938 |
Purge system and method of use
A purge system operable to remove lubricant from a liquid refrigerant material removed from an evaporator of a mechanical refrigeration system. The contaminated liquid refrigerant is delivered to...
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6925821 |
Method for extracting carbon dioxide for use as a refrigerant in a vapor compression system
Carbon dioxide refrigerant is circulated through a vapor compression system including a compressor, a gas cooler, an expansion device, and an evaporator. Carbon dioxide is extracted from a vehicle...
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6923011 |
Multi-stage vapor compression system with intermediate pressure vessel
A vapor compression system includes a first compression mechanism that compresses the working fluid from a low suction pressure to an intermediate pressure, a second compression mechanism that...
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6912860 |
Method of operating a directed relief valve in an air conditioning system
A method of operating a directed relief valve ( 28 ) for an air conditioning system ( 10 ) preferably for a vehicle. The air conditioning system ( 10 ) includes a compressor ( 12 ), a condenser (...
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6866089 |
Leak detection with thermal imaging
An infrared camera is used to detect leakages in a heat exchanger by an imaging process that indicates temperature differences between a heat exchanger and a pressurized gas therein. The...
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6851269 |
Apparatus and method for calculating refill amount of refrigerant
A refrigerant refill amount calculating apparatus is provided with concentration measuring units for measuring component ratios X 1 :Y 1 :Z 1 of fluorocarbon S contained in a refrigerating...
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6845626 |
Refrigeration apparatus
This invention makes it possible to charge a refrigeration apparatus with the amount of refrigerant that the refrigeration apparatus requires at the time of onsite installation. As a result, the...
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