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Class 700/276 - HVAC control


Subclass of Class 700 - Data processing: generic control systems or specific applications
Definition: Subject matter comprising an environmental control or an
No. of patents: 471
Last issue date: 05/22/2012


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NumberTitleIssue Date
6778945Rooftop package unit diagnostician
A diagnostic system for an HVAC system includes a number of sensors used to measure the operation of the HVAC system. Sensor readings are measured by timing the delay between when a strobe signal is sent to a sensor and when an interrupt signal from the sensor is re...
08/17/2004
6760760Control system communication server for transmitting files via multiple communication paths
A communication system includes a communication server having a file storage cache, at least one control system coupled to the communication server via a communication path, and at least one client application in communications with the communication server. The com...
07/06/2004
6745106Tone generating electronic device with paging module for verification of energy curtailment
A curtailment module is disclosed for enabling an energy provider to send a request to curtail energy use to a user. The curtailment module includes an interface for electronic communications with a temperature control device. A paging module is used to receive the ...
06/01/2004
6745085Fault-tolerant multi-node stage sequencer and method for energy systems
A method for controlling energy systems such as multiple boiler systems to meet an energy need includes a controller configured as a sequencer with the remaining controllers act as individual boiler controllers which periodically send status messages to the sequence...
06/01/2004
6741915Usage monitoring HVAC control system
Systems and methods are described for a usage monitoring HVAC control system. A method, includes: providing a usage monitoring heating ventilation and air conditioning control system, the usage monitoring heating ventilation and air conditioning control system inclu...
05/25/2004
6741914Notch filtering as used in a disc drive servo
A method for optimizing the attenuation of mechanical resonances of actuator driving energy of a disc drive is presented. The method generally involves determining a resonant frequency range of the disc drive, comparing the resonant frequency range to a filter cover...
05/25/2004
6732540Air conditioning plant and control method thereof
Provided are an air conditioning plant control method by which an air conditioning plant can be operated in a most desirable state, and an air conditioning plant so controlled. An air conditioning plant is controlled, which has at least one air conditioner, a refrig...
05/11/2004
6726113Temperature control strategy utilizing neural network processing of occupancy and activity level sensing
A temperature control system utilizes detected occupancy and activity levels to automatically condition a response of an HVAC system to a difference between a setpoint temperature and an actual temperature within a zone. The illustrated example includes an infrared ...
04/27/2004
6715690Slope predictive control and digital PID control
The present invention provides an airflow control loop that uses averaged airflow measurements without the problems that are normally encountered with averaging measurements, such as the delay introduced into the airflow control loop. This is accomplished, in the pr...
04/06/2004
6711470Method, system and apparatus for monitoring and adjusting the quality of indoor air
A system, method and apparatus is provided for monitoring and adjusting the quality of indoor air. A sensor array senses an air sample from the indoor air and analyzes the air sample to obtain signatures representative of contaminants in the air sample. When the lev...
03/23/2004
6711471Zone of greatest demand controller, apparatus, and method
A controller, multiple zone control apparatus, and method for controlling temperature independently in each zone for use in a structure having an interior divided into a plurality of zones. The controller is constructed and arranged to control the temperature in eac...
03/23/2004
6708083Low-power home heating or cooling system
The invention provides a low electric power-consuming heating or cooling system comprising a DC powered microprocessor-based control system and method and a DC powered electrically actuated zone valve. The control system operates on DC power allowing the heating or ...
03/16/2004
6694222Fuzzy logic control of a variable displacement compressor in a vehicle air conditioning system
A non-linear control method for an air conditioning system utilizes fuzzy logic to regulate the activation of a displacement control valve for a variable displacement compressor for maintaining a system parameter, such as the evaporator outlet pressure or...
02/17/2004
6647318Pulse modulation adaptive control method for activating an electrical device
A facility management system includes a device which produces a change of an environmental characteristic in a building. A method for operating the device involves sensing the environmental characteristic to provide a measured value, and defining a desire...
11/11/2003
6647317Air conditioner management system
An open network environment and a multi vendor system for an air conditioner is realized so that management and services can be made highly efficient. A management system for an air conditioner has a status database for storing collected running data, and...
11/11/2003
6640142System and method for controlling workspace environment
An occupant of a cubicle or office can activate transparent partitions to partially or completely enclose a cubicle and/or office to minimize noise, optimize privacy, lighting, air flow and temperature. This transparent partition is coated with a thin lay...
10/28/2003
6631619Air-conditioning apparatus
An air-conditioning apparatus, being able to download operation control information through a network, wherein a remote controller of the air-conditioner is structured, so that it can indicate the operation information download, and is provided a function...
10/14/2003
6628997Method for programming a thermostat
A method for programming a thermostat, comprising the steps of providing a thermostat programmed to convert programming codes into time-temperature schedules; determining a desired time-temperature schedule; developing a programming code corresponding to ...
09/30/2003
6604023Managing an environment utilizing a portable data processing system
Environmental indicators computed for a particular environment are converted into a transmittable data format each of the environmental indicators is computed by electronic environmental measurement device from among multiple diverse electronic environmen...
08/05/2003
6594554Apparatus and method for intelligent control of the fan speed of air-cooled condensers
A refrigeration system (10) has a compressor (12) that forces a refrigerant to flow in a loop between an evaporator (17) and a condenser (16). The present method controls the speed of a condenser fan (16) in response to the condenser temperature. In a fir...
07/15/2003
6591620Air conditioning equipment operation system and air conditioning equipment designing support system
A control server includes a device information database storing device characteristic data constituting the air conditioning equipment, a fuel/power rate database storing price and rate data regarding gas, oil, power and the like, a device characteristic ...
07/15/2003
6554198Slope predictive control and digital PID control
The present invention provides an airflow control loop that uses averaged airflow measurements without the problems that are normally encountered with averaging measurements, such as the delay introduced into the airflow control loop. This is accomplished...
04/29/2003
6549826VAV airflow control for preventing processor overflow and underflow
A method for controlling a variable airflow apparatus to prevent processor overflow and underflow, with the variable airflow apparatus including an airflow sensor for providing an airflow sensor signal, a stored relationship between the airflow sensor sig...
04/15/2003
6543932Enthalpy tunnel
An improved and accurate enthalpy tunnel is presented, designed to condition and control airflow patterns within the main tunnel and air sampling subsystem so as to present a homogenous volume immediately upon introduction into the enthalpy tunnel. The ai...
04/08/2003
6522954Smart control strategy for regulating a temperature controller
A smart control strategy/system for regulating a temperature controller for supplying or exhausting heat to/from a room, object or the like. The actual temperature of a room, object or the like requiring temperature control is prompted to dither between a...
02/18/2003
6505099Radiant energy control system
In a radiant energy heating system having one or more types of radiant energy heating sub-systems, a control system comprising a solid state electronic control panel pre-programmed to control two or more of the types of radiant heating sub-systems, wherei...
01/07/2003
6466834Method and apparatus for conversion of ventilation systems represented in computer-readable form
A method for converting a representation of a ventilation duct system in a computer readable form from a first duct type to a second duct type, such as circular and rectangular ducts. The method identifies straight duct elements in the system, calculates ...
10/15/2002
6463397Environmental monitoring and control system for a ventilated cage and rack system
An environmental monitoring and controlling system for a ventilated cage and rack system that monitors and measures air flow in the rack at either the rack or cage level. At the rack level, two pressure sensors are provided in a supply air system to accur...
10/08/2002
6449533Thermostat and method for controlling an HVAC system with remote temperature sensor
A thermostat adapted to be connected to a climate control system for operating the climate control system. The thermostat comprises a main unit having a microprocessor, a keypad connected to the microprocessor for operating the thermostat, and a sub-base....
09/10/2002
6424871Rotating machine integrated with controller, and inverter
The present invention provides a rotary machine integrated with a control device, which is effective to reduce the cost of manufacture of a variable-speed pump or the like, and allows control programs to be easily established at the installation site. The...
07/23/2002
6408228Hybrid finite state machine environmental system controller
The present invention provides a sequencing control strategy for environmental system controllers that takes better advantage of the capabilities of the system elements to enhance performance and reduce operating costs. Digital controller technology is in...
06/18/2002
6408215Isothermal port for microwave network analyzer and method
The present invention provides an isothermal port and method for a microwave network analyzer and more particularly an isothermal port and method to control the temperature of microwave standards to 23" 0.050° C. A test port adapter is used to adapt the ...
06/18/2002
6408225Device and method for balancing the weight on a robot arm
The invention relates to a device for balancing the weight carried by a robot arm of a robot. Said device comprises a fluid spring, rotably a pneumatic spring, and a control device for controlling the movements of the robot. The device is characterized by...
06/18/2002
6389331Technique for monitoring performance of a facility management system
A facilities management system is subdivided into a plurality of subsystems. The performance of the system is monitored by producing data which denotes a plurality of operational parameters for each of the subsystems. From that data, a global performance ...
05/14/2002
6385510HVAC remote monitoring system
An electronic HVAC monitoring computer continuously monitors the general condition and efficiency of an HVAC system and notifies a central station computer via modem link or other signal transmission means, when the general condition or efficiency of the ...
05/07/2002
6366832Computer integrated personal environment system
The environment of a work space is regulated by a controller connected to a computer network. A personal computer within the work space also is connected to the computer network and displays a control panel with symbols that a worker is able to alter to c...
04/02/2002
6353775Multiple instance single value identifiers environmental control communication method and system
A method of communicating between a plurality of devices in a controller area network is disclosed. The method includes authorizing a first device to transmit messages with a first identifier over the network, the first device transmitting a first message...
03/05/2002
6278909Method and apparatus for controlling the amount of power supplied to a conditioning device
The method and apparatus are for controlling an amount of power supplied to a conditioning device acting on an actual value of a predetermined physical parameter within an area in relation to a setting signal. The method comprising steps of monitoring the...
08/21/2001
6272399Method and system for maintaining a desired air flow through a fume hood
The present invention pertains to a system for controlling a fume hood with a face. The system comprises a device for controlling air flow through the fume hood based on air flow face velocity. The controlling device has a device for measuring pressure at...
08/07/2001
6240326Language independent building automation architecture for worldwide system deployment
A computer-implemented building automation operating system for supporting applications that interact with building automation devices in different locations. A computer-human interface is provided for viewing data related to the applications. A master na...
05/29/2001
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