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| Number | Title | Issue Date |
| 7261241 | Heating and cooling energy saving device A system for regulating the temperature of multiple areas within a facility using multiple energy savings devices (ESD) that each regulate the temperature of individual rooms or areas within a facility having a central heating and cooling plant. The device includes ... | 08/28/2007 |
| 7188779 | Zone climate control A zone climate control system and method of its operation. A zone can be a single room. A method for determining which zones' vents are to be closed, and which are to be opened, in performing heating or cooling, circulation to heat or cool a zone by mixing its air w... | 03/13/2007 |
| 7086459 | Method and apparatus for individually cooling components of electronic systems A cooling system is configured to supply individually metered amounts of cooling fluid to heat generating components, e.g., processors, micro-controllers, high speed video cards, disk drives, semi-conductor devices, and the like, of an electronic system. The cooling... | 08/08/2006 |
| 6957696 | Combination radiant and forced air climate control system A method and controller for controlling the operation of a zoned climate control system including a primary heat source, a secondary heat source, a cooling unit, and a humidifier unit. The controller is configured to receive both heating demand signals and cooling d... | 10/25/2005 |
| 6698219 | Energy-efficient variable-air-volume (VAV) system with zonal ventilation control A ventilation and air-conditioning system uses a first variable-air-volume system to cool and dehumidify fresh outside air and deliver it through a first duct to a mixing box located downstream. The system also uses a second variable-air-volume system to ... | 03/02/2004 |
| 6688384 | Heating and cooling energy saving device An energy savings device (ESD) for regulating the temperature of individual rooms or areas within a facility having a central heating and cooling plant. The device includes a fan and thermostats to control the temperature in each room. A first thermostat ... | 02/10/2004 |
| 6575233 | Combination radiant and forced air climate control system A method utilizing a controller for controlling the operation of a zoned climate control system including a primary heat source, a secondary heat source, a cooling unit, and a humidifier unit. The controller is configured to receive both heating demand si... | 06/10/2003 |
| 6415617 | Model based economizer control of an air handling unit A strategy for controlling an air side economizer of an HVAC system uses a model of the airflow through the system to estimate the load in two modes when minimum and maximum amounts of outdoor air are being introduced into the building. Transitions betwee... | 07/09/2002 |
| 6241156 | Process and apparatus for individual adjustment of an operating parameter of a plurality of environmental control devices through a global computer network An apparatus and process for individual adjustment of an operating parameter of a plurality of environmental control devices, such as VAV devices (27, 29) in an HVAC system. The process includes the step of connecting at least one of computers (34) for in... | 06/05/2001 |
| 5863246 | Variable air volume control system A system controls the pressure at which conditioned is to be provided to one or more zones to be heated or cooled by the conditioned air. The system actively computes a setpoint for the pressure with a location in a duct system upstream of where any of th... | 01/26/1999 |
| 5407002 | Multiple-zone air circulation control system An air circulation system is used to control the temperature in an area defined by a series of zones. The system has a hot deck and a cold deck, and a series of ducts each extending from the downstream side of the decks to a respective zone. A damper in e... | 04/18/1995 |
| 5318104 | Error based zone controller The present invention describes an apparatus and method for controlling the temperature in a plurality of comfort zones within a house or building. The invention contemplates a series of zone control devices which are selectively opened or closed to allow... | 06/07/1994 |
| 5209073 | Cooling device and method with multiple cooled chambers and multiple expansion means A cooling device having a refrigeration chamber (1) and a freezer chamber (3), a refrigeration plant having an evaporator (15) and condenser (18), a compressor (16) and air flow passageways (5, 8, 11) for conducting air flow across the evaporator and thro... | 05/11/1993 |
| 5180102 | Temperature control system for zoned space A variable air volume control system has a temperature system management device which calculates an air flow setpoint in a temperature zone as a function of a proportional term that accommodates gross temperature-setpoint errors, and integral term that pr... | 01/19/1993 |
| 5103896 | Air-conditioning system and operation method thereof An air conditioning for a room of a high-rise building, for example, is carried out in consideration of the difference in temperatures in a central interior zone and a circumferential perimeter zone of the room changeably to heating and cooling in accorda... | 04/14/1992 |
| 5024379 | Variable capacity heating appliance A heating system with a hot water coil is provided with a variable speed blower whose speed is regulated in response to a sensed load in the system. Heat can therefore be added to the hot water by way of a simple burner system, with the required control b... | 06/18/1991 |
| 4858377 | Plant oriented control system based upon vapor pressure deficit data A system for controlling environmental conditions including irrigation or misting in greenhouses having a plurality of crop beds within one greenhouse enclosure arranged into a plurality of sense zones and a plurality of control zones comprises a pluralit... | 08/22/1989 |
| 4856227 | Plant oriented control system based upon vapor pressure deficit data A system for controlling environmental conditions including irrigation or misting in greenhouses having a plurality of crop beds within one greenhouse enclosure. Aspirated enclosures have associated temperature sensors for measuring dry bulb temperature a... | 08/15/1989 |
| 4848654 | Zone control and smoke damping apparatus for central heating and/or cooling systems An improved zone control apparatus having mode selectors which allow a user to select any one of a variety of operating modes for individual fluidically actuated flow control devices. The invention further provides for a smoke damper which upon automatic ... | 07/18/1989 |
| 4718021 | Technique for fan cycling to maintain temperature within prescribed limits The temperature of a serviced area or zone is cost efficiently maintained within a prescribed range by establishing a prescribed fan cycle period, during which period the fan is both operative and non-operative at variable intervals. The temperature of th... | 01/05/1988 |
| 4661914 | Energy management control apparatus An energy management controller is coupled via a clock line pair, a "data out" line pair and a "data in" line pair, to a plurality or group of stations each having energy using equipment. Each station is electrically coupled to each line pair at spaced po... | 04/28/1987 |
| 4497031 | Direct digital control apparatus for automated monitoring and control of building systems A low level, microprocessor based direct digital system controller includes power supply means for providing a source of regulated electrical power to the controller. A field programmable processor means transfers selected data base information to and rec... | 01/29/1985 |
| 4406397 | Central air conditioning equipment Central air conditioning equipment which performs air conditioning for a plurality of rooms, comprises a terminal air quantity control unit which is installed in order to communicate with each room and which controls the quantity of the air stream which i... | 09/27/1983 |
| 4347712 | Microprocessor discharge temperature air controller for multi-stage heating and/or cooling apparatus and outdoor air usage controller An air conditioning system furnishing temperature conditioned air to a plurality of zones each of which has its own zone damper controlled by its own space thermostat. The system has an air discharge temperature sensor downstream of the temperature condit... | 09/07/1982 |
| 4215408 | Temperature control of unoccupied living spaces Apparatus is provided for controlling, during unoccupied periods, the operation of an HVAC system and perimeter heating system providing hot air and hot fluid, respectively, to a temperature controlled living space having occupied and unoccupied periods, ... | 07/29/1980 |
| 4186655 | Method and apparatus for controlling forced air heating and/or cooling A forced air heating and/or cooling system in a building is provided with the usual main supply conduits or duct which have various branch ducts leading to different areas of the building. Pressure sensitive instruments at spaced locations in the main sup... | 02/05/1980 |
| 4058253 | Method and apparatus for conservation of energy and containment and evacuation of smoke in a high rise building Apparatus is provided for use in the method of conserving energy by operating a ventilating and air conditioning system in a high rise building in a manner to permit operation of a heating and cooling unit at a reduced percentage of full capacity while ad... | 11/15/1977 |
| 4009825 | Control for forced air heating or cooling system An SCR motor speed controller in a forced air heating and/or cooling system has a relay-operated potentiometer with a variable voltage tap which controls the speed of the fan motor in accordance with the total demand from individual room thermostats. Each... | 03/01/1977 |
