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| Number | Title | Issue Date |
| 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 of refrigerant in a radiator which contributes to the effic... | 02/07/2012 |
| 8079226 | Method for accurately recharging A/C systems A refrigerant recovery unit for accurately filling a refrigerant system with a refrigerant is provided which includes a storage vessel for holding refrigerant, sensors to assist in determining the pressure of the refrigerant in the storage vessel, a controller to co... | 12/20/2011 |
| 7980086 | Air conditioner An air conditioner is provided that is capable of allowing an operator to know, during a refrigerant charging operation using a cylinder, that the refrigerant cylinder is emptied without using a scale or the like. An air conditioner in which the refrigerant is charg... | 07/19/2011 |
| 7866172 | System and method for controlling working fluid charge in a vapor compression air conditioning system Vapor compression air conditioning systems are provided with a flow restrictor for transferring working fluid to and from at least one of the compressor low pressure inlet conduit and compressor high pressure outlet conduit to provide for accurate charge adjustment ... | 01/11/2011 |
| 7854134 | Air conditioner An air conditioner is provided with a refrigerant circuit and an operation controller. The refrigerant circuit includes a heat source unit, a refrigerant communication pipe, an expansion mechanism, and a utilization unit. The heat source unit has a compression mecha... | 12/21/2010 |
| 7854133 | Air conditioning service station with electrically driven analog-display pressure gauges An apparatus and method for displaying pressure on electrically driven analog-display pressure gauges. A diagnostic service equipment for a vehicle having a refrigerant system, the refrigerant system having a plumbing circuit for transferring a refrigerant between t... | 12/21/2010 |
| 7832222 | Background tank fill based on refrigerant composition A portable recovery unit for automatically filling a background tank of blended refrigerant includes a main tank for holding recovered refrigerant from a vehicle A/C system which has a first chemical composition, and an auxiliary tank for holding an auxiliary supply... | 11/16/2010 |
| 7814757 | Operating algorithm for refrigerant safety system A method of operating a directed relief valve to ventilate a refrigerant by sensing the concentration of refrigerant leakage from the air conditioning system, and if the first concentration exceeds a threshold, by sensing a second concentration. If the first and sec... | 10/19/2010 |
| 7752855 | Air conditioner with refrigerant quantity judging mode An air conditioner has a heat source unit with a compressor and a heat source heat exchanger and utilization units with utilization expansion valves and utilization heat exchangers. The heat source unit and the utilization unit are interconnected via refrigerant com... | 07/13/2010 |
| 7690209 | Refrigerant charging method in refrigeration system using carbon dioxide as refrigerant A refrigerant charging method in an air conditioner using carbon dioxide as a refrigerant includes a first refrigerant charging step and a second refrigerant charging step. The first refrigerant charging step is a step of charging a refrigerant charging target porti... | 04/06/2010 |
| 7677049 | Algorithm for activation of directed relief system from vehicle accelerometers during crash A method of venting a refrigerant from an air conditioning system of a vehicle during a crash to mitigate leakage of the refrigerant into a cabin of the vehicle by crashing a test vehicle under a first set of predetermined conditions a number of crash events and mea... | 03/16/2010 |
| 7650759 | Apparatus for controlling refrigerant level An apparatus for controlling a refrigerant level comprises a first detecting unit installed at a lower side of the inside of a refrigerant tank, for detecting whether a refrigerant stored at a lower side of the inside of the refrigerant is a liquefied refrigerant or... | 01/26/2010 |
| 7640758 | Refrigerant tracking/leak detection system and method A refrigeration system includes a mass of refrigerant, a reservoir containing a first portion of the mass of refrigerant, and a condenser containing a second portion of the mass of refrigerant. A first sensor is positioned to measure a first parameter of the reservo... | 01/05/2010 |
| 7631508 | Apparatus and method for determining refrigerant charge level A method and apparatus for non-invasively determining a charge level of a refrigerant in a vapor-compression cycle system. The method and apparatus monitor the system while the system is operated to ascertain that the system is operating at approximately steady-stat... | 12/15/2009 |
| 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 cold air circulator, includes inputting the operation capacity of com... | 10/27/2009 |
| 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 amount of refrigerant to be removed or added to the cooling system for o... | 03/10/2009 |
| 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 predetermined location. A rack of refrigerant rack lines is routed from the loc... | 02/24/2009 |
| 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 a fluid vessel. The refrigerant is compressed in the compressor and c... | 01/20/2009 |
| 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 pressure hose on an air conditioning charging unit, determining if a press... | 09/09/2008 |
| 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 temperature in the liquid line of the condenser discharge, with the diff... | 06/17/2008 |
| 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 when there is a fear that the refrigerant releases into the vehicle com... | 06/17/2008 |
| 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 calculated utilizing at least two different methods. The two calcula... | 06/03/2008 |
| 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 indicative of a heat exchanger liquid level. A reservoir is in fluid c... | 05/27/2008 |
| 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 three-way valve. The present invention simply drains the refrigerant... | 05/13/2008 |
| 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 two valves connected to each other via a control chamber. A first pr... | 04/15/2008 |
| 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 expected equilibrium pressure corresponding to a current ambient tempe... | 03/18/2008 |
| 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 humidity, conditioned air temperature, and compressor cycling signals. The r... | 03/04/2008 |
| 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 system; a control valve disposed to control flow of the refrigerant from ... | 12/25/2007 |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7293428 | Refrigerating machine A refrigerating machine comprising a compressor, a radiator, a pressure-reducing device, a gas-liquid separator, plural heat absorbers functioning selectively in different temperature zones, a unit for allowing introduction of gas refrigerant separated in the gas-li... | 11/13/2007 |
| 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 source container and the vaporizer changes the refrigerant from a liquid... | 11/13/2007 |
| 7287380 | Heat system utilizing solar energy A heat system utilizing solar energy is disclosed herein, which includes at least one solar panel, an energy control unit, a temperature control device, at least one heat-radiating element, and at least one storage cell. The solar panel collects solar energy and tra... | 10/30/2007 |
| 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 coupled to a pressurized container that selectively opens the container val... | 10/02/2007 |
| 7275387 | Integrated ice and beverage dispenser An ice cube-making machine that is characterized by noiseless operation at the location where ice cubes are dispensed and be lightweight packages for ease of installation. The ice cube-making machine has an evaporator package, a separate compressor package and a sep... | 10/02/2007 |
| 7260943 | Apparatus and method for servicing a coolant system An apparatus, system and method for servicing a coolant system, such as, an automobile air conditioner are disclosed. In one embodiment, the apparatus may comprise a device for measuring a parameter of the coolant system; and means for selectively switching between ... | 08/28/2007 |
| 7261763 | Method for the recovery and recycle of helium and chlorine Methods for recovering and recycling helium and unreacted chlorine from a process for manufacturing optical fiber are disclosed. Helium-rich and chlorine-rich gas streams are recovered from the consolidation furnace and separated. The helium-rich stream is dried and... | 08/28/2007 |
| 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 preferably having an accuracy within about ±0.2 ounce. The cartridge is f... | 08/14/2007 |
| 7254957 | Method and apparatus for cooling with coolant at a subambient pressure According to one embodiment, an apparatus includes a fluid coolant and structure which reduces a pressure of the fluid coolant through a subambient pressure at which the coolant has a cooling temperature less than a temperature of the heat-generating structure. The ... | 08/14/2007 |
| 7254983 | Fuel gauge for hydrogen storage media A hydrogen gas storage container has a canister with at least one outlet opening for charging and discharging gas, the canister enclosing a metal hydride capable of absorbing and desorbing hydrogen gas and a gauge for measuring the capacity of hydrogen remaining wit... | 08/14/2007 |
| 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 evaporator, a heat recovery circuit extending from a first terminus between... | 07/03/2007 |
