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| Number | Title | Issue Date |
| 8132421 | Turbo chiller, heat source system, and methods for controlling them There is provided a turbo chiller that can be operated at high efficiency within an adequate chilling capacity range even when the cooling water temperature changes during the operation. The adequate chilling capacity range is obtained by using a flow coefficient an... | 03/13/2012 |
| 7762093 | Method for controlling variable capacity compressor of air conditioner A variable capacity air conditioner compressor is controlled by setting a car target indoor temperature; sensing car indoor and outdoor temperatures and solar radiation with sensors at predetermined car positions; calculating a vent target discharge temperature usin... | 07/27/2010 |
| 7421850 | Refrigeration system and method of operating the same A refrigeration system including an evaporator, a suction header in fluid communication with the evaporator, a compressor in fluid communication with the suction header, and a condenser in fluid communication with the compressor and the evaporator. The refrigeration... | 09/09/2008 |
| 7412841 | Turbo chiller, compressor therefor, and control method therefor A compressor for a turbo chiller that can stably and efficiently operate in various operating states is provided. An aerodynamic feature map showing a rotating stall line at which rotating stall occurs is provided on a map represented by a flow parameter reflecting ... | 08/19/2008 |
| 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 |
| 7367197 | Refrigerated open condiment rail Systems and methods are disclosed for maintaining a low internal temperature in items held in an open container system. Example embodiments generate a stationary, insulating layer of cold air that covers the exposed surface and slows the transfer of heat from the en... | 05/06/2008 |
| 7367198 | Method of control for a refrigerated merchandiser The present invention provides a refrigerated merchandiser including a case defining a product display area. The product display area defines a highest temperature zone and a lowest temperature zone. The merchandiser includes a first product simulator positioned in ... | 05/06/2008 |
| 7341050 | Charge air cooler having refrigerant coils and method for cooling charge air An apparatus and a method for cooling charge air, comprising the steps of cooling at least one cooling agent conduit with a cooling agent (Step 401), flowing thermally charged air through a plurality of charge air conduits positioned in proximity to the at le... | 03/11/2008 |
| 7338262 | Downhole compressor A downhole dynamic compressor comprises an electric motor having a stator 6 with stationary windings and an armature with permanent magnets 7 supported on gas bearings 9, 10 for rotation relative to the stator. The gas bearings 9 and 1... | 03/04/2008 |
| 7337769 | Charge air cooler having refrigerant coils and method for cooling charge air An apparatus and a method for cooling charge air, comprising the steps of introducing a cooling agent into at least one cooling agent conduit whereby the at least one cooling agent conduit is cooled (Step 401), flowing thermally charged air through a pluralit... | 03/04/2008 |
| 7310966 | Universal direct current brushless air conditioning system A universal direct current brushless air conditioning system preferably includes a blower unit and a compressor unit. The blower unit preferably includes an evaporator, at least one inlet fan, at least one outlet vent, a direct current controller, a thermostatic exp... | 12/25/2007 |
| 7290989 | Compressor protection and diagnostic system A compressor assembly includes a shell, a compressor housed within the shell, and a motor drivingly connected to the compressor. In addition, a sensor assembly is provided for monitoring operating parameters of the compressor assembly. Processing circuitry, in commu... | 11/06/2007 |
| 7281910 | Motor driven compressor A motor driven compressor having a motor for driving a compression mechanism includes a connecting portion for connecting between an external terminal for supplying electricity to the motor and a wire end portion of a stator of the motor. The connecting portion is l... | 10/16/2007 |
| 7269963 | Vehicle air conditioning apparatus Parameters are set in accordance with a running condition of a vehicle and an environmental condition based on a wiper operation signal of the vehicle. The parameters are used to calculate a stable vehicle interior surface temperature Tna of a window glass. The stab... | 09/18/2007 |
| 7249468 | Air conditioning system An air conditioning system has a compressor for compressing a liquid refrigerant to form a high pressure vapor which is fed to a condenser for cooling the vapor so that it returns to liquid state and fed to an evaporator. In the evaporator, the liquid is transformed... | 07/31/2007 |
| 7228694 | Cooling control system for an ambient to be cooled, a method of controlling a cooling system, and a cooler A cooling system for cooling an ambient to be cooled, a cooler and a method of controlling a cooling control system are described. The cooling control system comprises a variable capacity compressor and a controller, the controller measuring the load of the compress... | 06/12/2007 |
| 7225864 | Multi-channel temperature control system for semiconductor processing facilities A temperature control system for a semiconductor processing facility includes a common cooling unit for controlling the temperature of a cooling fluid and multiple remote temperature control modules that separately control temperatures of multiple process components... | 06/05/2007 |
| 7216498 | Method and apparatus for determining supercritical pressure in a heat exchanger A method and apparatus to determine the pressure of a supercritical refrigerant within a heat exchanger of a transcritical vapor compression system. A plurality of measurements, e.g., temperature, are obtained at spaced locations on the heat exchanger and the locati... | 05/15/2007 |
| 7201010 | Compressor control system for vehicle air conditioner In a compressor control system for a vehicle air conditioner, a hybrid ECU of the vehicle controls a rotation speed of a compressor electric motor. In this case, an output circuit, which outputs a driving signal for driving the compressor electric motor, only needs ... | 04/10/2007 |
| 7201008 | Vapor compression system performance enhancement and discharge temperature reduction in the unloaded mode of operation A vapor compression system includes a main vapor compression circuit having a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the compressor having a suction port, a main discharge port and an intermediate... | 04/10/2007 |
| 7191609 | Cooling apparatus There is provided a cooling apparatus which can improve cooling efficiency of an evaporator while preventing freezing of articles housed in a cooled space thereof. The cooling apparatus comprises: a control device which controls a compressor; and a temperature senso... | 03/20/2007 |
| 7193341 | Turbomachine for low-temperature applications A turbomachine for low-temperature applications, has a rotor shaft; at least one rotor disk that is arranged in overhung manner at one shaft end of the rotor shaft; an electric machine having a stator having windings, and an electric rotor arranged on the rotor shaf... | 03/20/2007 |
| 7191608 | Cooling apparatus There is provided a cooling apparatus which can prevent an abnormal increase in pressure of a high side at the time of starting. The cooling apparatus comprises: a refrigerant circuit which uses carbon dioxide as a refrigerant; and a control device which controls a ... | 03/20/2007 |
| 7177742 | Vehicular air-conditioner and method of controlling the same A vehicular air-conditioner includes a compressor to be driven by an engine. The vehicular air-conditioner includes a controller configured to reduce a load on the compressor in response to a braking condition of a vehicle. ... | 02/13/2007 |
| 7171820 | Non-linear control algorithm in vapor compression systems A PID control for a vapor compression system utilized to heat water identifies a particular range of error signals and derivative of the error signals that could be indicative of the cycle moving in an inefficient direction. If this determination is made, then a sub... | 02/06/2007 |
| 7159408 | Charge loss detection and prognostics for multi-modular split systems A method for detecting and predicting refrigerant level includes the steps of determining an estimated value for a parameter indicative of refrigerant level and comparing that estimated value to an actual value. The difference between the actual and estimated value ... | 01/09/2007 |
| 7143591 | Refrigerator A refrigerator of the present invention includes a refrigerating cycle including a compressor, a condenser, an expander and an evaporator and filled with a flammable refrigerant, a load detector detecting a change in load of the compressor, and a control device dete... | 12/05/2006 |
| 7114350 | Refrigerator with evaporator of variable dimensions A refrigerator with an evaporator and at least one preservation compartment, in which the evaporator is formed from extendable spiral-wound tube of engineering polymer. ... | 10/03/2006 |
| 7104076 | Lubricant return schemes for use in refrigerant cycle A control algorithm is developed which takes corrective action in the event that system conditions indicate there may be an inadequate flow of lubricant in the system. In particular, if a discharge pressure is below a predetermined amount or if the suction modulatio... | 09/12/2006 |
| 7093454 | Centrifugal heat transfer engine and heat transfer systems embodying the same A heat transfer engine having cooling and heating modes of reversible operation, in which heat can be effectively transferred within diverse user environments for cooling, heating and dehumidification applications. The heat transfer engine of the present invention i... | 08/22/2006 |
| 7086242 | Dehumidifying air-conditioning apparatus A dehumidifying air-conditioning apparatus comprises a pressurizer (4) for raising a pressure of a refrigerant, a condenser (5) for condensing the refrigerant to heat a high-temperature heat source fluid, and an evaporator (1) for evaporating th... | 08/08/2006 |
| 7080521 | Mobile refrigeration system and control A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evapor... | 07/25/2006 |
| 7075268 | System and method for increasing output horsepower and efficiency in a motor A system and method are provided to increase the horsepower of an induction motor. One technique for increasing the horsepower of a motor is to connect the motor to a variable speed drive that is providing an output voltage and frequency greater than the standard li... | 07/11/2006 |
| 7069984 | Multi-channel temperature control system for semiconductor processing facilities A temperature control system for multiple process components in a semiconductor processing facility includes a common cooling unit for controlling the temperature of a cooling fluid and multiple remote temperature control modules in fluid communications with the com... | 07/04/2006 |
| 7069734 | Methods for detecting surge in centrifugal compressors A method and apparatus for detecting surge in a refrigeration system that includes a centrifugal compressor having an impeller and a compressor entrance, an evaporator that receives a fluid refrigerant, a suction line that flows the refrigerant from the evaporator t... | 07/04/2006 |
| 7013669 | Arrangement for multi-stage heat pump assembly A gasdynamic arrangement for a multi-stage centrifugal turbomachine, such as a two-stage compressor, comprising two coaxial impellers assembled on a common shaft with axial intake ports and radial peripheral discharge zones, the intake ports of the two impellers pre... | 03/21/2006 |
| 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 installation furthermore comprises measurement facilities making it p... | 02/28/2006 |
| 6993921 | Multi-variable control of refrigerant systems A control particularly useful for a hot water heating system, includes calculation of a desired leaving water temperature for water leaving a hot water heat exchanger, and a desired refrigerant condition for most efficiently achieving the desired leaving water tempe... | 02/07/2006 |
| 6966498 | Solar radiation compensation method for a vehicle climate control A vehicle climate control is compensated for direct and indirect infrared heat loading due to solar radiation based on a mean radiant temperature sensor and a cabin air temperature sensor. The mean radiant temperature sensor include a temperature responsive element ... | 11/22/2005 |
| 6964176 | Centrifugal heat transfer engine and heat transfer systems embodying the same A heat transfer engine having cooling and heating modes of reversible operation, in which heat can be effectively transferred within diverse user environments for cooling, heating and dehumidification applications. The heat transfer engine of the present invention i... | 11/15/2005 |
