US Patent No: 8,195,335

Number of patents in Portfolio can not be more than 2000

Economizer control

ALSO PUBLISHED AS: 20110172831

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The present disclosure provides a method for controlling an economizer of an HVAC system. The economizer has an outside air stream of incoming outside air, a return air stream of return air, and a mixed air stream of mixed incoming outside air and return air that is provided to the cooling unit of the HVAC system. The economizer also includes one or more controllable dampers for controlling a mixing ratio of incoming outside air to return air in the mixed air stream. The control method includes positioning the one or more controllable dampers in first and second configurations such that the mixed air stream has first and second mixing ratios of incoming outside air to return air in the mixed air stream. The method also includes recording first and second measures related to the temperature of the mixed air stream when the dampers are in each of the first and second configurations. First and second measures related to other parameters of the mixed air stream may be recorded as well. Based on the recorded first and second measures related to the temperature of the mixed air stream and possibly other recorded measures related to mixed air stream parameters, the method determines whether and/or how much of the incoming outside air to admit into the economizer via the one or more controllable dampers during subsequent operation of the HVAC system.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HONEYWELL INTERNATIONAL INC.MORRISTOWN, NJ8367

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Grabinger, Cory - 26 8
Kreft, Todd Richfield, MN 17 7
McMillan, Scott Colville, WA 21 12
Wacker, Paul - 24 59

Cited Art Landscape

Patent Info (Count) # Cites Year
 
JOHNSON CONTROLS TECHNOLOGY COMPANY (7)
5,292,280 Method and apparatus for controlling ventilation rates and indoor air quality in an HVAC system 42 1992
5,791,408 Air handling unit including control system that prevents outside air from entering the unit through an exhaust air damper 54 1996
6,006,142 Environmental control system and method 95 1997
6,223,544 Integrated control and fault detection of HVAC equipment 71 1999
6,415,617 Model based economizer control of an air handling unit 66 2001
2008/0179,408 Sensor-free optimal control of air-side economizer 23 2007
2008/0179,409 Adaptive real-time optimization control 22 2007
 
HONEYWELL INTERNATIONAL INC. (6)
6,249,100 Drive circuit and method for an electric actuator with spring return 20 1997
6,161,764 Enhanced economizer controller 38 1999
6,826,920 Humidity controller 23 2002
2006/0107,670 Demand control ventilation sensor failure 4 2004
2006/0130,502 Virtual controller for mixed air low temperature protection of HVAC systems 5 2004
7,434,413 Indoor air quality and economizer control methods and controllers 24 2005
 
Honeywell Inc. (5)
4,182,180 Enthalpy comparator 29 1977
4,347,712 Microprocessor discharge temperature air controller for multi-stage heating and/or cooling apparatus and outdoor air usage controller 45 1980
4,423,364 Electric motor damper drive with backup power pack 16 1982
4,570,448 Economizer control apparatus 18 1983
5,762,420 Damper actuator controller having an enthalpy sensor input 4 1996
 
TRANE INTERNATIONAL INC. (2)
5,276,630 Self configuring controller 118 1990
2006/0117,769 Ventilation controller 9 2004
 
AIRCUITY, INC. (1)
2006/0234,621 Multipoint air sampling system having common sensors to provide blended air quality parameter information for monitoring and building control 22 2006
 
BATTELLE MEMORIAL INSTITUTE (1)
6,778,945 Rooftop package unit diagnostician 11 2001
 
BOARD OF REGENTS OF THE UNIVERSITY OF NEBRASKA (1)
2007/0037,507 Multi-zone air handling systems and methods with variable speed fan 9 2006
 
DAY AUTOMATION SYSTEMS, INC. (1)
4,605,160 Air blending apparatus for heating, ventilating and air conditioning (HVAC) 24 1984
 
HITACHI, LTD. (1)
5,719,408 Thin film transistor substrate, manufacturing method thereof, liquid crystal display panel and liquid crystal display equipment 22 1997
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (1)
2001/0052,756 Electric power steering apparatus 2 2001
 
HVAC MODULATION TECHNOLOGIES LLC (1)
5,801,940 Fault-tolerant HVAC system 45 1996
 
Lux Products Corporation (1)
6,988,671 Programmable thermostat incorporating air quality protection 59 2003
 
Mitsubishi Jukogyo Kabushiki Kaisha (1)
4,580,620 Controlling the airflow rate in an air conditioner 11 1985
 
OGD V-HVAC, Inc. (1)
2005/0278,071 Adaptable HVAC; AC motor speed, air temperature and air quality control system 48 2004
 
PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA (1)
2003/0193,657 Range finder device and camera 3 2003
 
PHOENIX CONTROLS CORPORATION (1)
6,609,967 Methods and apparatus for recirculating air in a controlled ventilated environment 11 2000
 
TRANE COMPANY THE, LA CROSSE, (1)
4,379,484 Control for a variable air volume temperature conditioning system-outdoor air economizer 27 1981
 
WATLOW ELECTRIC MANUFACTURING COMPANY (1)
2007/0289,322 Air handler unit fan installation and control method 5 2007
 
YORK INTERNATIONAL CORPORATION (1)
7,099,748 HVAC start-up control system and method 5 2004
 
Other [Check patent profile for assignment information] (1)
2008/0176,503 Fully articulated and comprehensive air and fluid distribution, metering, and control method and apparatus for primary movers, heat exchangers, and terminal flow devices 4 2008

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
AMAZON TECHNOLOGIES, INC. (1)
8,721,409 Airflow control system with external air control 0 2007
 
HONEYWELL INTERNATIONAL INC. (1)
8,688,278 Economizer control 0 2012

Maintenance Fees

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3.5 Year Payment $1600.00 $800.00 $400.00 Dec 5, 2015
7.5 Year Payment $3600.00 $1800.00 $900.00 Dec 5, 2019
11.5 Year Payment $7400.00 $3700.00 $1850.00 Dec 5, 2023
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Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00