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| Number | Title | Issue Date |
| 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 duty cycle control signal in response to the property and causes the co... | 06/24/2008 |
| 7380407 | Multi air conditioning system and method for operating the same A multi air conditioning system for adjusting the amount of refrigerant flowing into indoor units determined to be in a stopped state, to improve the overall system efficiency, and a method for operating the multi air conditioning system. The method includes determi... | 06/03/2008 |
| 7331191 | Heating, ventilation and air conditioning (HVAC) system and method using feedback linearization A new feedback linearization approach to advanced control of single-unit and multi-unit HVAC systems is described. In accordance with the approach of the invention, this new nonlinear control includes a model-based feedback linearization part to compensate for the n... | 02/19/2008 |
| 7296428 | Table top refrigerated beverage dispenser A self-contained beverage chilling apparatus including a refrigerant cooling system comprising a refrigerant reservoir in a fluid communication with a cold plate, a refrigerator accumulator, a compressor and a refrigerant condenser mounted within a housing unit. The... | 11/20/2007 |
| 7287396 | Evaporator pressure regulator control and diagnostics An apparatus for refrigeration system control includes a plurality of circuits, each circuit having at least one refrigeration case and an electronic evaporator pressure regulator in communication with each circuit. Each electronic evaporator pressure regulator cont... | 10/30/2007 |
| 7251950 | Heating/cooling system There is provided a heating/cooling system capable of reducing power consumption. The heating/cooling system has a receiving room capable of using hot air and cold air in a switching manner, and comprises a refrigerant circuit which comprises a compressor, a gas coo... | 08/07/2007 |
| 7178353 | Thermal control system and method A system and method for controlling the temperature of a process tool uses the vaporizable characteristic of a refrigerant that is provided in direct heat exchange relation with the process tool. Pressurized refrigerant is provided as both condensed liquid and in ga... | 02/20/2007 |
| 7131283 | Method for controlling multi-type air conditioner Method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, some of which heat rooms, and rest of which are turned off, including the steps of (S11) defining... | 11/07/2006 |
| 7127905 | Vapor compression system startup method A method of controlling a startup operation in a heat pump water heater system prevents inadvertent shutdowns and/or low operating efficiencies via closed loop control of the system. The method includes choosing an expansion valve opening at startup near an expected... | 10/31/2006 |
| 7086250 | Outdoor unit of air conditioner An outdoor air conditioner unit is connected to indoor units by a gaseous refrigerant communication pipe and a liquid refrigerant communication pipe. The outdoor air conditioner unit is provided with a gas-side shut-off valve and a liquid-side shut-off valve. The ga... | 08/08/2006 |
| 7076964 | Super-critical refrigerant cycle system and water heater using the same In a heat-pump water heater with a super-critical refrigerant cycle, a valve open degree of a decompression valve is controlled to control a pressure of high-pressure side refrigerant so that a temperature difference between refrigerant flowing out from the water-re... | 07/18/2006 |
| 7076962 | Heating, ventilation and air conditioning (HVAC) system and method using feedback linearization A new feedback linearization approach to advanced control of single-unit and multi-unit HVAC systems is described. In accordance with the approach of the invention, this new nonlinear control includes a model-based feedback linearization part to compensate for the n... | 07/18/2006 |
| 7069983 | Air conditioner An air conditioner for a vehicle includes a refrigerant cycle having an evaporator which is disposed in a blowing duct and cools air by refrigerant evaporation in the blowing duct; a compressor setting the evaporated refrigerant at a high temperature and high pressu... | 07/04/2006 |
| 7051542 | Transcritical vapor compression optimization through maximization of heating capacity A vapor compression system includes a compressor, a gas cooler, an expansion device, and an evaporator. Refrigerant is circulated through the system. The high side pressure of the vapor compression system is selected to optimize the heating capacity. In one example,... | 05/30/2006 |
| 7032781 | Drink dispenser assembly and container for drink and drink dispensing line A drink dispenser assembly (1, 25) includes a dispenser device (2) provided with a dispensing head (18, 29) for accommodating a dispensing line (17, 28), and a container (7, 27) containing drink, in particular carbonated drink, con... | 04/25/2006 |
| 7000413 | Control of refrigeration system to optimize coefficient of performance A refrigeration system includes a compressor, a gas cooler, an expansion device, and an evaporator. Refrigerant is circulated though the closed circuit system. Preferably, carbon dioxide is used as the refrigerant. As carbon dioxide has a low critical point, systems... | 02/21/2006 |
| 6990822 | Pressure adjusting device for air conditioning system and air conditioning system equipped with the same The present invention relates to an air conditioning system provided with an outdoor unit having a compressor and an outdoor heat exchanger, an indoor unit having an indoor heat exchanger, and a gaseous refrigerant pipe connecting the indoor heat exchanger to the co... | 01/31/2006 |
| 6952934 | Self-cooling liquid container The present invention relates to a self-cooling liquid container for rapidly cooling the liquid in a container by evaporation of coolant gas. A self-cooling liquid container having a liquid cooling device for cooling a liquid in a container by evaporation of a coola... | 10/11/2005 |
| 6786057 | Vehicle air conditioning device using a supercritical cycle An air conditioning unit including an expansion device (4) of the refrigerating fluid loop controlled to set the internal heat exchanger efficiency η, represented by the equation: η=TccTsc/TsrTsct, wherein: T... | 09/07/2004 |
| 6745583 | Defrosting apparatus of air conditioner and method thereof Disclosed are a defrosting apparatus of an air conditioner and a method thereof. The defrosting apparatus includes a temperature sensor for sensing a pipe temperature of an outdoor heat exchanger and an outdoor temperature; a comparator for comparing the sensed pipe... | 06/08/2004 |
| 6612122 | Expansion valve An expansion valve has a tube body, in which a first filtering net, drying agents, a bullet-shaped filtering net, and a, reducing body are integrated. The tube body has front and rear ends respectively joined to an inlet tube, and an outlet tube. The firs... | 09/02/2003 |
| 6578375 | Mobile air conditioning system and control mechanisms therefor The performance of mobile air conditioning systems is improved with the use of a pressure sensing valve to control refrigerant flow in the system. The pressure sensing valve is connected between the condenser and the evaporator. The control valve senses t... | 06/17/2003 |
| 6230506 | Heat pump cycle system A heat pump cycle system which can switches cooling operation and heating operation for a compartment includes a first inside heat exchanger and a second inside heat exchanger disposed in an air conditioning case. The first inside heat exchanger is dispos... | 05/15/2001 |
| 6216477 | Regulating device for air conditioner refrigerant circuit A control device is provided for a refrigerant circuit of an air conditioner, divided by a compressor and a vent element into a high-pressure side and a low-pressure side. The control device includes a high-pressure-side control part and a low-pressure-si... | 04/17/2001 |
| 6209333 | Mobile air conditioning system and control mechanism The performance of mobile air conditioning systems is improved with the use of a pressure sensing valve to control refrigerant flow in the system. The pressure sensing valve is connected between the condenser and the evaporator. The control valve senses t... | 04/03/2001 |
| 6209334 | Systems and methods for capacity regulation of refrigeration systems An arrangement is provided for insuring that excessive demand is not placed on a refrigeration unit that supplies pressurized subcooled refrigerant to different channels having independent needs for use of refrigeration capacity. A separate reference chan... | 04/03/2001 |
| 6164081 | Process for regulating a refrigerating system, refrigerating system and expansion valve In a process for regulating a refrigeration system (1) using an expansion valve (4), one side of the regulating member is pressed by the pressure of refrigerant at the evaporator side and the other side of the regulating member is pressed by the vapor pre... | 12/26/2000 |
| 6101827 | Temperature comparison circuit and refrigeration expansion valve Temperature comparison circuits which utilize two thermistors which are initially set up in a balanced bridge using NPN transistors and resistors. As temperature differences between the thermistors cause the bridge to become unbalanced, there is a current... | 08/15/2000 |
| 6053000 | Refrigeration unit The present invention consists of a refrigeration unit with an adjusting valve that functions to control the flow of refrigerant and which is installed between the condenser and the evaporator. The adjusting valve is modulated by a controller that adjusts... | 04/25/2000 |
| 6050098 | Use of electronic expansion valve to maintain minimum oil flow A method of controlling an expansion valve including the steps of: measuring a primary system condition; determining an error in the primary system condition; measuring a secondary system condition; determining an error in the secondary system condition; ... | 04/18/2000 |
| 6035653 | Air conditioner An air conditioner capable of enhancing responsivity of a blowout temperature of conditioned air while preventing occurrence of an overshoot or undershoot condition of the blowout temperature when a user gives an instruction to change the blowout temperat... | 03/14/2000 |
| 5966950 | Method of regulating a refrigeration circuit A process for controlling a refrigeration system, as well as the refrigeration system and a new expansion valve for the refrigeration system. An electronic regulator is used to operate a sensor system having a device for applying heat power to the sensor ... | 10/19/1999 |
| 5941084 | Control-information detecting apparatus for a refrigeration air-conditioner using a non-azeotrope refrigerant A control-information detecting apparatus for a refrigeration air-conditioner using a non-azeotrope refrigerant is equipped with a temperature detector and a pressure detector at the refrigerating cycle of the air-conditioner, which cycle is formed by con... | 08/24/1999 |
| 5732564 | Heat pump apparatus and method for stable operation with inhibition of foaming A heat pump apparatus which includes: an accumulator and a sub-accumulator for additionally accommodating the refrigerant arranged between the accumulator and the compressor, in which at least the accumulator or the sub-accumulator is provided with a flow... | 03/31/1998 |
| 5623834 | Diagnostics for a heating and cooling system Compressor discharge temperature, ambient outdoor air temperature and thermal load are used as control parameters for controlling the expansion valve setting and indoor fan speed. Diagnostics monitor a feedback signal from the fan motor to detect fan over... | 04/29/1997 |
| 5460012 | Cooling apparatus Cooling apparatus is disclosed which comprises a reservoir for compressed, preferably liquified, gas, the reservoir being connected to tubing 130 arranged to be disposed in an article of clothing adjacent to the skin of a user. A solenoid 230 is provided ... | 10/24/1995 |
| 5425246 | Refrigerant flow rate control based on evaporator dryness Pulse width modulation is used to control the flow rate through a solenoid expansion valve in a refrigeration system. A first temperature sensor is located near the evaporator inlet, and a second temperature sensor is disposed in a compartment to be coole... | 06/20/1995 |
| 5400609 | Methods and apparatus for operating a refrigeration system characterized by controlling maximum operating pressure A refrigeration system of the type having an economizer cycle is provided with a null cycle, in addition to heating and cooling cycles, without shutting a compressor prime mover down, to preserve air flow in a conditioned space. First, second and third co... | 03/28/1995 |
| 5386700 | Liquid pressure amplification with superheat suppression Liquid pressure amplification with superheat suppression is used in an air-conditioning or refrigeration system which includes a compressor, a condenser, an expansion valve, and an evaporator, interconnected by conduits in a closed refrigerant loop. A fir... | 02/07/1995 |
| 5353602 | Non-steady-state self-regulating intermittent flow thermodynamic system A thermodynamic system, such as a vapor compression refrigeration system, in which a binary expansion valve allows pulsed high velocity flow to an evaporator through an isentropic flow nozzle wherein the valve is controlled in response to evaporator press... | 10/11/1994 |
