| YORK INTERNATIONAL CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20110179821 | MEDIUM VOLTAGE STARTER FOR A CHILLER UNIT - A single medium voltage starter box is mounted on a chiller unit with the other components of the chiller system. The starter box can be positioned on the chiller system unit to permit the starter box to be close coupled to the motor, and specifically to the main motor lead exit hub without the need for any power conduit connections between the starter box and the motor. In addition, the starter box also does not require any control interface and receives controls from a control panel. A short conduit connection between the control panel and the starter box is used to provide the necessary connections between the control panel and the starter box. | 07-28-2011 |
| 20110167846 | METHOD AND SYSTEM FOR DEHUMIDIFICATION AND REFRIGERANT PRESSURE CONTROL - A method for dehumidification and controlling system pressure in a refrigeration system includes providing a refrigeration system having a compressor, a condenser and an evaporator connected in a closed refrigerant loop. Each of the condenser and evaporator have a plurality of refrigerant circuits. A first heat transfer fluid is flowed over the condenser and a second heat transfer fluid is flowed over the evaporator. At least one of the refrigerant circuits of the condenser is isolated to provide a decreased amount of heat transfer area within the condenser and to increase the refrigerant pressure within the refrigeration system when the refrigerant pressure within the refrigeration system is at or below a predetermined pressure. At least one of the refrigerant circuits of the evaporator is isolated to dehumidify and maintain the temperature of the second heat transfer fluid at or above a predetermined temperature when dehumidification is required. | 07-14-2011 |
| 20100030385 | TWO-ZONE FUZZY LOGIC LIQUID LEVEL CONTROL - A level 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 to maintain a desired liquid level in the condenser. The fuzzy logic methodology incorporates a plurality of fuzzy logic control algorithms each having different membership functions and other control parameters that can provide different degrees of level control in the condenser. A particular fuzzy logic control algorithm is selected based on the amount a measured liquid level in the condenser deviates from the desired liquid level in the condenser. | 02-04-2010 |
| 20090266092 | APPARATUS TO SENSE AND CONTROL COMPRESSOR OPERATION IN AN HVAC SYSTEM - An HVAC system and method for configuring a controller to control a compressor including a detection system provided to determine a type of compressor. The detection system includes a processor; and a load sensing circuit connected between the processor and a controller. The controller has a plurality of output connections connectable to a compressor. The load sensing circuit senses whether a load is present on each output connection of the plurality of output connections and provides a load signal to the processor indicating whether a load is present on each output connection. The load signals are processed with the processor to determine the type of compressor is present. The controller is configured to control the compressor in response to the determined type of compressor. | 10-29-2009 |
| 20090099668 | HTML DRIVEN EMBEDDED CONTROLLER - A method and system is provided for gathering, processing, displaying, and manipulating data from building equipment using a dedicated HTML-driven, non-PLC controller having an integral web server. Authorized users who use microprocessor controlled devices to access the website are provided with displayed equipment data that can be selected, monitored, and adjusted based on a user profile controlled by software of the controller. | 04-16-2009 |
| 20090064711 | SYSTEM AND METHOD FOR USING HOT GAS REHEAT FOR HUMIDITY CONTROL - A humidity control method is provided for a multi-stage cooling system having two or more refrigerant circuits that balances humidity control and cooling demand. Each refrigerant circuit includes a compressor, a condenser and an evaporator. A hot gas reheat circuit having a hot gas reheat coil is connected to one of the refrigerant circuits and is placed in fluid communication with the output airflow from the evaporator of that refrigerant circuit to provide additional dehumidification to the air when humidity control is requested. The hot gas reheat circuit bypasses the condenser of the refrigerant circuit during humidity control. Humidity control is only performed during cooling operations and ventilation operations. | 03-12-2009 |
