Air And Fire Control Patents (Class 236/11)
  • Patent number: 9763551
    Abstract: An air moving appliance comprising an electric motor coupled to a fan, a control system for controlling the motor, the control system including monitoring means configured to monitor a motor load parameter; memory means configured to store a predetermined reference motor load parameter value; compensating means that determines a compensated reference motor load parameter value based on the predetermined reference motor load parameter value and a set of ambient environment input conditions; comparison means configured to compare the motor load parameter and the compensated reference motor load parameter value and trigger an operational event based on the result of the comparison. The invention also relates to a method of controlling an air moving appliance.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: September 19, 2017
    Assignee: DYSON TECHNOLOGY LIMITED
    Inventors: Russell Scott Murchie, Mark Stamford Vanderstegen-Drake
  • Patent number: 9765965
    Abstract: A controller for a gas furnace, a computer-usable medium for implementing a method and a gas furnace are disclosed herein. In one embodiment, the controller includes: (1) an interface configured to receive a heating call and (2) a processor configured to enable an inducer of the gas furnace at a low speed based on the heating call and ignite the gas furnace at a high fire operation when determining a low fire pressure switch of the gas furnace is open.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: September 19, 2017
    Assignee: Lennox Industries Inc.
    Inventors: Glenn W. Kowald, Darcy Q. Easterling
  • Patent number: 9486813
    Abstract: An HVAC system having an air cleaner, a fan configured to selectively generate an air flow, wherein at least a portion of the air flow is passed through the air cleaner, and a controller configured to control the air cleaner in response to at least one of a setting for controlling the fan and an operation characteristic of the fan is disclosed.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: November 8, 2016
    Assignee: Trane International Inc.
    Inventor: John Mark Hagan
  • Patent number: 9335045
    Abstract: A controller for a gas furnace, a computer-usable medium for implementing a method and a gas furnace are disclosed herein. In one embodiment, the controller includes: (1) an interface configured to receive a heating call and (2) a processor configured to enable an inducer of the gas furnace at a low speed based on the heating call and ignite the gas furnace at a high fire operation when determining a low fire pressure switch of the gas furnace is open.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: May 10, 2016
    Assignee: Lennox Industries Inc.
    Inventors: Glenn W. Kowald, Darcy Q. Easterling
  • Patent number: 9322568
    Abstract: A control system is disclosed for a house HVAC system including a thermostat, supply and return air plenums and an HVAC fan. The thermostat selectively controls the HVAC system to maintain the desired temperature and resulting in a variable operating cycle period between successive on times. A fresh air intake duct is between an exterior intake vent and the return air plenum. A stale air exhaust duct is between the return air plenum and an exterior exhaust vent. The control system comprises a controllable intake damper in the fresh air intake duct and a controllable exhaust damper in the stale air exhaust duct. A controller is operatively connected to the house HVAC fan and the controllable dampers. The controller predicts an upcoming cycle period for a next successive operating cycle and calculates a fresh air vent time.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: April 26, 2016
    Assignee: FIELD CONTROLS, LLC
    Inventor: James L. Aycock
  • Patent number: 9261277
    Abstract: In a multistage combustion furnace having a motor driven inducer blower and a pressure sensing device or set of switches for sensing pressure in the combustion gas flowpath through the furnace, a high firing rate blower speed and low firing rate blower speed are set based on the blower speed setting required for a medium firing rate. Each particular furnace, having its own pressures and combustion gas resistance to flow characteristics, may be provided with a database of inducer blower motor speeds required to achieve predetermined pressures in the combustion gas flowpath for a variety of combustion gas venting systems generating such resistance.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: February 16, 2016
    Assignee: Trane International Inc.
    Inventors: Gordon Jeffrey Hugghins, Stephen Kowalski, Robert G. Roycroft
  • Patent number: 9243811
    Abstract: According to one embodiment, a PMV estimating device calculates a PMV value from an average room radiation temperature, room temperature, room humidity, room air velocity, an amount of cloth worn by a person in the room, and an amount of activity of the person in the room. The PMV estimating device includes: indoor solar radiation calculator; solar radiated article temperature estimator; and average radiation temperature estimator. The indoor solar radiation calculator calculates an amount of solar radiation entered into the room. The solar radiated article temperature estimator estimates a temperature of a solar radiated article receiving the solar radiation entered into the room, by using the amount of solar radiation entered into the room calculated by the indoor solar radiation calculator. The average radiation temperature estimator estimates the average room radiation temperature by using the temperature of the solar radiated article estimated by the solar radiated article temperature estimator.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: January 26, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaaki Saito, Yasuo Takagi, Koichi Ikeda, Yukio Hiraoka, Kenji Mitsumoto, Dai Murayama, Nobutaka Nishimura, Yoshikazu Ooba, Yutaka Iino
  • Patent number: 9164519
    Abstract: Environmental conditions within an enclosure containing critical equipment and devices are monitored and when outside of acceptable parameters corrective action is taken to modify these environmental conditions so as to bring them within acceptable limits. Unless an environmental condition is outside of an acceptable limit, no energy expenditure is made by the environmental conditioning equipment since it does not need to be in use. When the environmental conditioning equipment is called into operation, its environmental modification influence is monitored to determine if the expected environmental modification is occurring within an expected time period(s). If the expected environmental modification does not occur within the expected time period, and/or does not occur at an expected time rate of change, then an alarm is generated to indicate that maintenance may be required for the environmental conditioning equipment.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: October 20, 2015
    Assignee: Cooper Technologies Company
    Inventor: David Carr Holloway
  • Patent number: 9105430
    Abstract: A method and device for automatically resetting a water-cooled air conditioner system at least once during a 24 hour period. The device included a tamper resistant housing having a micro-controller electrically coupled to a 24 volt external power source. A normally closed relay is coupled to the micro-controller, the relay having an input and output receptacle for selectively coupling to a low voltage input power line of an air conditioner system. The micro-controller is programmed to randomly open the relay input and output receptacle at least once every 24 hour period to stop the operation of the air conditioning system for timed sequence of about 4 minutes for purposes of resetting the air conditioner system.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: August 11, 2015
    Assignee: Ready Reset 2X LLC
    Inventor: John Morales
  • Patent number: 9092040
    Abstract: A method is described for identifying faults relating to an HVAC system, such a clogged filter. Sensor data is used to estimate HVAC system efficiency. Trends in system efficiency are then used to identify faults such as clogged filters. The sensor(s) can include one or more of the following types: optical sensor, temperature sensor, pressure sensor, acoustic transducer, humidity sensor, resistive sensor, capacitive sensor, and infrared sensor. The efficiency estimation can also be based on conditions external to the building, such as data from exterior sensors and/or data gathered from third parties such as government or private weather stations. The efficiency estimation can also be based on performance metrics such as the time used to reach a set point temperature. The fault identification includes filtering out non-fault related events.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: July 28, 2015
    Assignee: Google Inc.
    Inventors: Anthony Michael Fadell, Yoky Matsuoka, Matthew Lee Rogers, David Sloo
  • Patent number: 8876524
    Abstract: A furnace is disclosed that includes a burner with a firing rate that is variable between a minimum and a maximum firing rate. After a call for heat is received, the firing rate is set to an initial level above the minimum firing rate, and the burner is ignited. The firing rate is then modulated downward toward the minimum firing rate. If the flame is lost during or after modulation, the burner is reignited and the firing rate is maintained above the firing rate at which the flame was lost until the current call for heat is satisfied. In some cases, the firing rate is maintained until one or more subsequent calls for heat are satisfied.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: November 4, 2014
    Assignee: Honeywell International Inc.
    Inventors: Michael William Schultz, Jonathan McDonald, Victor J. Cueva
  • Patent number: 8764435
    Abstract: A modulating furnace having a variable rate burner and a controller is operated at a first burner firing rate for a first period of time, and a higher burner firing rate once the first period of time has expired. In some instances, the burner may be operated only while the controller is receiving a call for heat from a thermostat or the like.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: July 1, 2014
    Assignee: Honeywell International Inc.
    Inventors: Timothy J. Nordberg, Brent Chian, Michael W. Schultz, Douglas D. Bird
  • Patent number: 8721325
    Abstract: A method for starting a combustion device, in particular after a first ignition failure, in particular for starting a gas burner under unknown basic conditions, wherein a characteristic diagram of a start air ratio depending on the burner temperature known from empirical analysis is stored for the combustion device in a memory, wherein a calibration of the starting process is performed, wherein the ratio of opening of the gas valve (w) to air volume mL necessary for ignition is iteratively determined by variation of the gas and/or air volume; and in case of ignition, the combustion device is started and the applicable air ratio (?)IGNITION is stored.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: May 13, 2014
    Assignee: ebm-papst Landshut GmbH
    Inventors: Ulrich Geiger, Martin Geiger, Rudolph Tungl
  • Publication number: 20140061322
    Abstract: Provided herein are embodiments of a multistage gas furnace, a controller therefor and a computer-usable medium having non-transitory computer readable instructions stored thereon for execution by a processor to perform a method for operating a gas furnace. In one embodiment, the gas furnace includes: (1) a burner, (2) a circulation fan and (3) a furnace controller. The furnace controller having: (3A) an interface configured to receive heating calls and a blower control signal, the blower control signal corresponding to an operating speed of the circulation fan and (3B) a processor configured to respond to the heating calls and the blower control signal by setting and adjusting a gas input rate for the burner that is based on the blower control signal and that corresponds to a discharge air temperature determined by a dedicated discharge air sensor associated with the furnace.
    Type: Application
    Filed: September 6, 2012
    Publication date: March 6, 2014
    Applicant: LENNOX INDUSTRIES INC.
    Inventors: Peter Hrejsa, Glenn W. Kowald, Darko Hadzidedic
  • Patent number: 8573504
    Abstract: A furnace for burning solid burning biomass fuels such a municipal waste and wood pellets including a first compartment containing a hopper, a motorized auger positioned in the bottom of the auger for conveying a solid fuel out of the hopper, a first blower tube operatively coupled to the hopper for receiving the solid fuel from the hopper and a first blower operatively coupled to the blower tube for blowing the fuel through first blower tube. In a second compartment, the furnace contains a combustion chamber operatively coupled to the blower tube opposite the first blower and a heat exchanger arranged above the combustion chamber. To cool the heat exchanger, a second blower is operatively coupled to the heat exchanger for blowing a cooling air through the heat exchanger. A programmable control system is operatively coupled to the auger, the first blower, the second blower and a plurality of thermocouples for controlling the operation of the furnace.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: November 5, 2013
    Assignee: Lee Energy Solutions
    Inventors: Davis Lee, Dale Carroll, Chris Pankey, James Richard Bullington, Adam Lee Walker, Steven Michael Birchfield, Billy Erskin Hosmer, Stephen Wayne Bennett, Amanda Lauren Conger
  • Patent number: 8471511
    Abstract: A voltage application unit causes switching elements to apply voltage to flow an electric current into corresponding windings to generate a revolving magnetic field. A period derivation unit derives an energization period of the windings. A signal generation unit generates a PWM signal for causing the voltage application unit to activate and deactivate the switching elements, such that a duty ratio decreases gradually in a predetermined time period subsequent to the derived energization period. A period specifying unit specifies a detection period of an electric current, which is supplied from the switching elements presently switched and deactivated, by a predetermined time period between an edge, which is caused when the PWM signal changes in level to deactivate the switching elements, and a time point in advance of the edge in the energization period.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: June 25, 2013
    Assignee: ASMO Co., Ltd.
    Inventor: Takayuki Kitagawa
  • Publication number: 20130040253
    Abstract: The disclosure provides a controller for a multistage gas furnace, a multistage gas furnace and computer readable medium for performing a method to operate a furnace. In one embodiment, the controller includes: (1) an interface configured to receive a heating call and (2) a corrosion reducer configured to ignite the gas furnace at a high fire operation based on if an indoor circulating fan of the gas furnace is active.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Applicant: Lennox Industries, Incorporated
    Inventors: Glenn W. Kowald, Hans J. Paller
  • Patent number: 8275484
    Abstract: A controller for a variable heating system is operable to control a stepper motor operated gas valve to adjust gas flow to vary the heating level. The controller includes a first terminal for receiving a thermostat signal requesting heating, an electronic memory, and a microprocessor in communication with the electronic memory and first terminal. The microprocessor detects a thermostat signal requesting heating, and generates a control signal for the stepper motor to operate the gas valve. The microprocessor includes a programmable read-only-memory encoded with an instruction to store a time duration during which the microprocessor detects a thermostat signal requesting heating, and further encoded with an instruction operable to determine a predetermined heating level based on the stored time duration. The microprocessor responds to a thermostat signal requesting heating by determining the number of steps the motor must move to vary the gas flow corresponding to the predetermined heating level.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: September 25, 2012
    Assignee: Emerson Electric Co.
    Inventors: Thomas B. Lorenz, David L. Perry
  • Patent number: 8235707
    Abstract: The present invention relates to a control method of preventing backflow of exhaust gas into combustion chambers of boilers or water heaters that are not in operation for a multiboiler comprising a plurality of boilers or water heaters connected in line, each of which including a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor. The control method includes measuring wind pressures using the wind pressure sensors in the operating boilers and calculating an average wind pressure, using any controller as a master controller to determine a control amount of wind of the fans of non-operational boilers based on the average wind pressure, and operating the fans of the non-operational boilers on the basis of the control amount of wind.
    Type: Grant
    Filed: December 26, 2008
    Date of Patent: August 7, 2012
    Assignee: Kyungdong Networks Co., Ltd.
    Inventor: Si-Hwan Kim
  • Patent number: 8123518
    Abstract: A modulating furnace having a variable rate burner and a controller is operated at a first burner firing rate for a first period of time, and a higher burner firing rate once the first period of time has expired. In some instances, the burner may be operated only while the controller is receiving a call for heat from a thermostat or the like.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: February 28, 2012
    Assignee: Honeywell International Inc.
    Inventors: Timothy J. Nordberg, Brent Chiain, Michael W. Schultz, Douglas D. Bird
  • Publication number: 20110309155
    Abstract: A method and system for operating a modulating furnace from a single-stage thermostat. The furnace control system may include a processor, a gas valve, a variable-speed motor, and a thermostat. The furnace control may execute a thermostat algorithm comprising the steps of: determining if a heating load needs to be satisfied; running burners at an intermediate input rate, a modulated input rate, and a maximum input rate for each respective first, second, and third time intervals until the heating load is satisfied; calculating a heating load requirement as function of the time intervals; and determining an initial input rate for a next cycle based on the calculated heating load requirement.
    Type: Application
    Filed: May 24, 2011
    Publication date: December 22, 2011
    Applicant: Carrier Corporation
    Inventor: Kevin D. Thompson
  • Patent number: 8074892
    Abstract: Methods and systems for operating a fuel fired appliance that may include an optional hardware component such as a damper are disclosed. In some cases, the presence of the optional hardware component is detected, and it is determined whether the optional hardware component is required for future operation of the fuel fired appliance. The fuel fired appliance may be operated normally if the optional hardware component is present and required, or, in some cases, if the optional hardware component is determined to be not required. If the optional hardware component is absent but required, normal operation of the fuel fired appliance may be stopped.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: December 13, 2011
    Assignee: Honeywell International Inc.
    Inventors: Scott J. Bracken, Brent Chian, Timothy J. Nordberg, Henry E. Troost
  • Publication number: 20110269082
    Abstract: Systems, methods, and controllers for controlling gas-fired appliances such as warm air furnaces are disclosed. An illustrative furnace system can include a burner unit in communication with a combustion air flow conduit and heat exchanger, a variable speed inducer fan or blower adapted to provide a flow of combustion air to the burner unit, a furnace controller and motor speed control unit adapted to regulate the speed of the inducer fan or blower, and a pneumatically modulated gas valve adapted to variably output gas pressure to the burner unit based at least in part on the combustion air flow.
    Type: Application
    Filed: July 7, 2011
    Publication date: November 3, 2011
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventor: Michael W. Schultz
  • Patent number: 7913927
    Abstract: An electronic circuit for a hot water heating system conserves fuel consumption and reduces carbon dioxide emissions. A heating system includes a burner that heats water and a room thermostat. The electronic circuit comprises an override thermostat which has a setting for a lower temperature limit and an upper temperature limit below those of the room thermostat. The override thermostat is operable to activate continuous operation of the burner when the indoor temperature falls below the lower temperature limit of the override thermostat and until the upper temperature limit of the override thermostat is reached. The electronic circuit further comprises a timer operable to deactivate and reactivate the burner while the room thermostat is calling for heat.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: March 29, 2011
    Inventor: James Edward Sambrook
  • Patent number: 7905722
    Abstract: The present invention relates to a system and method for controlling a burner's adjustable secondary air controller. Specifically, the system relates to a control logic for the control of an air supply to a burner such as a natural gas burner used in the production and/or processing of liquid and gaseous petroleum products and in natural gas dehydration systems.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: March 15, 2011
    Inventors: Rodney T. Heath, Forrest D. Heath, Gary Heath
  • Patent number: 7861707
    Abstract: A pellet stove utilizing gravity feed and natural draft more effectively and efficiently burns pellet fuel while producing less air pollution and ash. In one embodiment, the pellet stove has a primary combustion area comprising a burn unit removably disposed in the vent tube, a feed tube defining a fuel chamber above the burn unit and a secondary combustion area, comprising a burn box defining a secondary burn chamber, below the burn unit. The burn unit has a removable receptacle which defines a primary burn chamber that receives pellet fuel from the fuel chamber and discharges substantially burned fuel to the secondary burn chamber for additional burning. Openings in the burn box, pellet receptacle and vent tube draw air into the burn chambers. A control mechanism controls the air flow to regulate the heat generated by the pellet stove. The pellet stove can be manufactured in various aesthetically pleasing designs.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: January 4, 2011
    Inventor: Gary Wisener
  • Patent number: 7735743
    Abstract: A furnace control system for controlling a gas-fired induced-draft furnace having a variable speed inducer blower. A control apparatus, responsive to a signal corresponding to the magnitude of a pressure difference between an inlet and outlet of the combustion chamber, controls blower motor speed to maintain the pressure difference at a predetermined magnitude corresponding to a selected gas flow rate. Inducer blower motor speed is varied directly and precisely to maintain an optimal pressure drop across the combustion chamber. The control system can be used in multi-stage and modulating furnace systems and in furnace systems utilizing pressure- assist modulating gas values.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: June 15, 2010
    Assignee: Emerson Electric Co.
    Inventor: Horst Eric Jaeschke
  • Patent number: 7731096
    Abstract: A controller for a two-stage heat source is provide, which may be connected to either a single stage or a two-stage thermostat to provide low stage heating for a variable time period before switching to high stage heating. The controller includes at least a first terminal for receiving a signal requesting heating from a single-stage thermostat or a two-stage thermostat connected to the first terminal. A microcontroller in communication with the first terminal determines a duty cycle value for a heating cycle based on the duration in which a signal at the first terminal is present relative to the duration of the heating cycle. The microcontroller determines a low stage time limit from the duty cycle, and provides low stage heating when a signal is present at the first terminal for a time period not more than the time limit, and switches to high stage heating after the time limit.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: June 8, 2010
    Assignee: Emerson Electric Co.
    Inventors: Thomas B. Lorenz, David L. Perry
  • Patent number: 7721972
    Abstract: Methods and systems for operating a fuel fired appliance that may include an optional hardware component such as a damper are disclosed. In some cases, the presence of the optional hardware component is detected, and it is determined whether the optional hardware component is required for future operation of the fuel fired appliance. The fuel fired appliance may be operated normally if the optional hardware component is present and required, or, in some cases, if the optional hardware component is determined to be not required. If the optional hardware component is absent but required, normal operation of the fuel fired appliance may be stopped.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: May 25, 2010
    Assignee: Honeywell International Inc.
    Inventors: Scott J. Bracken, Brent Chian, Timothy J. Nordberg, Henry E. Troost
  • Patent number: 7651034
    Abstract: A universal controller for coordinating activity of an appliance room including a configurable air control portion, and a configurable appliance control portion. The configurable air control portion controls at least one air flow condition of the appliance room and includes an air control interface adapted to be operatively coupled with at least one of an influent combustion air system and a venting system. The configurable appliance control portion controls operation of a plurality of appliances and includes at least one appliance interface adapted to be operatively coupled with the plurality of appliances. The appliance control portion is adapted to selectively coordinate operation of individual appliances such that a selected at least one of the plurality of appliances can be operated according to a dynamically adjustable sequence.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: January 26, 2010
    Assignee: Tjernlund Products, Inc.
    Inventors: John R. Weimer, Timothy G. Hoyez
  • Patent number: 7455238
    Abstract: A controller and method for operating an HVAC system including an air conditioning unit, such as a gas furnace, having three stages of heat output and responsive to signals from a single stage or two stage thermostat. The W1, W2, and W3 inputs to the controller may be configured for receipt of a single stage control signal simultaneously or paired as W1, W2 or W2, W3. The system controller is configured to determine which input connection arrangement is in existence and operates the system in mock one stage or mock two stage modes depending on the signals received from a single or two stage thermostat, respectively.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: November 25, 2008
    Assignee: Trane International Inc.
    Inventor: Gordon Jeffrey Hugghins
  • Publication number: 20080124667
    Abstract: Systems, methods, and controllers for controlling gas-fired appliances such as warm air furnaces are disclosed. An illustrative furnace system can include a burner unit in communication with a combustion air flow conduit and heat exchanger, a variable speed inducer fan or blower adapted to provide a flow of combustion air to the burner unit, a furnace controller and motor speed control unit adapted to regulate the speed of the inducer fan or blower, and a pneumatically modulated gas valve adapted to variably output gas pressure to the burner unit based at least in part on the combustion air flow.
    Type: Application
    Filed: October 18, 2006
    Publication date: May 29, 2008
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventor: Michael W. Schultz
  • Patent number: 7322532
    Abstract: A hot-water supply apparatus is an apparatus which has a primary heat exchanger absorbing sensible heat of combustion exhaust and a secondary heat exchanger absorbing latent heat of the combustion exhaust, and improves a freezing prevention function of the hot-water supply apparatus at a cold period. Further, this apparatus has a temperature detection means (temperature sensors) which detects a freezing prevention temperature, a combustion means (a burner group) which supplies combustion exhaust generated by combustion to the primary and secondary heat exchangers, an air supply means which supplies air to the combustion means, and a control means (a control unit) which makes the combustion means burn and drives the air supply means based on a detected temperature of the temperature detection means.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: January 29, 2008
    Assignee: Takagi Industrial Co., Ltd.
    Inventors: Akira Takada, Akihito Yamashita, Katsumi Naitoh
  • Patent number: 7296426
    Abstract: An interactive system for controlling the operation of an HVAC system is provide that comprises a thermostat for initiating the operation of the HVAC system in either a full capacity mode of operation or at least one reduced capacity mode of operation, and a controller for an outside condenser unit having a condenser fan motor and a compressor motor, the controller being capable of operating the compressor in a full capacity mode and at least one reduced capacity mode. The system also comprises a controller for an indoor blower unit having a blower fan motor, the controller being capable of operating the blower fan motor in a full capacity mode an at least one reduced capacity mode. The system further includes a communication means for transmitting information between the outside condenser unit controller and at least the indoor blower controller, where the information relates to the operation of the indoor blower and the outdoor condenser unit.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: November 20, 2007
    Assignee: Emerson Electric Co.
    Inventors: William P. Butler, Steven L. Carey, Hung Pham, Nagaraj Jayanth
  • Patent number: 7293718
    Abstract: A heating or cooling system, such as an HVAC system, of variable output has a number of control elements and may include a variable speed compressor, a variable speed combustion (induced or forced draft) blower motor; a variable speed circulator blower motor; a variable output gas valve or gas/air premix unit; and a controller specifically developed for variable output applications. The system may utilize a pressure sensor to determine the actual flow of combustion airflow in response to actual space conditions, vary the speed of the inducer blower, and subsequently vary the gas valve output to supply the correct amount of gas to the burner system. A temperature sensor may be located in the discharge air stream of the conditioned air to provide an input signal for the circulator blower.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: November 13, 2007
    Assignee: Varidigm Corporation
    Inventors: Paul E. Sigafus, Ralph H. Torborg, James W. Ratz, Larry L. Lutton
  • Patent number: 7225995
    Abstract: An air handler operates alternately in (a) a heating state at times when air in a space in a building is at an actual temperature that is insufficient relative to a set temperature and (b) a non-heating state at times when the air in the space is at an actual temperature that is sufficient relative to a set temperature, and at least sometimes during the non-heating state, delivering heated air to the space.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: June 5, 2007
    Assignee: Lipidex Corporation
    Inventor: Michael P. Sanchez
  • Patent number: 7191826
    Abstract: A fan motor speed control system for controlling the fan motor speed of an air conditioning system includes a power output circuit including a power triac which is turned on and off by an opto-isolator connected to a pulse generator circuit for varying an AC voltage waveform imposed on the fan motor. The pulse generator circuit is connected to heating and cooling ramp circuits and a minimum speed circuit to provide a variable voltage signal imposed on the pulse generator circuit corresponding to the temperature difference sensed by a return air sensor and a heating or cooling sensor or by separate heating and cooling sensors disposed adjacent respective heating and cooling heat exchangers of the air conditioning system. An adjustable minimum speed circuit and a cutoff circuit are provided to control motor minimum speed or motor shutoff when a predetermined minimum speed is reached to prevent motor bearing failure or overheating.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: March 20, 2007
    Assignee: Hoffman Controls Corp.
    Inventors: Howard P. Byrnes, Walter William Bowman
  • Patent number: 7104460
    Abstract: A method of determining the amount of air flowing through an outside air damper of a recirculating air heater includes the steps of sensing an amount of airflow flowing through the damper, recording the amount of airflow and a damper position value at a plurality of damper positions, and interpolating a curve relating the amount of airflow to the damper position for all damper positions between a minimum damper position and a maximum damper position. Once the amount of air flowing through the outside air damper is determined from a position on the curve, the concentration of carbon dioxide (CO2) within a building space can be calculated and/or determined to be within acceptable limits.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: September 12, 2006
    Assignee: Maxitrol Company
    Inventors: Mark Geoffrey Masen, David Ray Sundberg, John James Schlachter, Frank Phillip Mimick
  • Patent number: 7048537
    Abstract: An apparatus is provided for controlling a fuel fired heating appliance, the apparatus comprising a first processor for controlling the ignition operation of the furnace and a second processor for controlling the operation of a variable speed blower motor, wherein the first processor sends communication signals to the second processor requesting a desired speed of the blower motor to provide air flow for combustion. The second processor responsively sends a signal to the first processor indicating the receipt of the requested speed for the blower motor. The apparatus further comprises at least one pressure switch, where the first processor senses an opening of the pressure switch and responds by successively sending incrementally higher speed request signals to the second processor until the first processor detects the closing of the at least one pressure switch.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: May 23, 2006
    Assignee: Emerson Electric Co.
    Inventors: Horst E. Jaeschke, Andrew Juengst
  • Patent number: 6986469
    Abstract: Control apparatus for an environmental control system comprises input circuitry receiving environmental information and output circuitry for controlling an HVAC system. Processing circuitry in the controller configures the output circuitry based at least in part on the signals received on the input circuitry. Information about the status of the HVAC system may be transferred to system administrators using a wireless link.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: January 17, 2006
    Assignee: Electric City Corporation
    Inventors: Dale A. Gauthier, Guy D. Covert
  • Patent number: 6925999
    Abstract: A multistage furnace for heating residential or commercial spaces is operated by a single stage thermostat and a return air temperature sensor providing sensed temperature information to a controller. The furnace is started at a first, low firing rate and after a predetermined time is increased to a second firing rate if the rate of change of temperature of air returning to the furnace from the space is less than a predetermined amount. The method of operation is carried further to increase the firing rate to second and third rates based on predetermined rates of temperature change of return air from the enclosed space as sensed by the return air sensor.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: August 9, 2005
    Assignee: American Standard International Inc.
    Inventors: Gordon Jeffrey Hugghins, Leonard W. Holmes
  • Patent number: 6866202
    Abstract: A heating or cooling system, such as an HVAC system, of variable output has a number of control elements and may include a variable speed compressor, a variable speed combustion (induced or forced draft) blower motor; a variable speed circulator blower motor; a variable output gas valve or gas/air premix unit; and a controller specifically developed for variable output applications. The system may utilize a pressure sensor to determine the actual flow of combustion airflow in response to actual space conditions, vary the speed of the inducer blower, and subsequently vary the gas valve output to supply the correct amount of gas to the burner system. A temperature sensor may be located in the discharge air stream of the conditioned air to provide an input signal for the circulator blower.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: March 15, 2005
    Assignee: Varidigm Corporation
    Inventors: Paul E. Sigafus, Ralph H. Torborg, James W. Ratz, Larry L. Lutton
  • Patent number: 6860430
    Abstract: An air handler operates alternately in (a) a heating state at times when air in a space in a building is at an actual temperature that is insufficient relative to a set temperature and (b) a non-heating state at times when the air in the space is at an actual temperature that is sufficient relative to a set temperature, and at least sometimes during the non-heating state, delivering heated air to the space.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: March 1, 2005
    Assignee: Lipidex Corporation
    Inventor: Michael P. Sanchez
  • Patent number: 6848623
    Abstract: The present invention provides a system and single controller for receiving constant and individualized information from a plurality of air control systems. A single controller is capable of controlling and interacting with at least two separate air control systems to control an environmental characteristic, and in the process, reduces the costs associated with the manufacturing and every day operation of the individual systems. In addition, the controller is capable of intelligently communicating with the input and output devices of the system, and particularly with each individually interfaced appliance, such that the controller can adaptively control the system through the use of stored historical data.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: February 1, 2005
    Assignee: Tjernlund Products, Inc.
    Inventors: John R. Weimer, Timothy G. Hoyez
  • Patent number: 6758208
    Abstract: A compact, highly flexible and efficient, multi-positionable, multi-dimensional and multi-stage gas-fired heat exchanger system as described. The system is connectable in a forced air duct regardless of the angular position and size of the duct. The heat exchanger comprises one or more heat transfer tubes which are shaped and dimensioned as dictated by the customized use of the heat exchanger. The tubes are secured to a support panel as well as the gas burner associated with each of the inlet openings of the tubes. A position orientable gas valve is secured to a gas distribution manifold. A turbulator may be associated with at least some of the tubes to cause turbulence in the hot combustion flow in each of the tubes to modify the efficiency in heat transfer along one or more sections of the tubes by directing hot combustion gas along an inner circumferential wall of the tubes.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: July 6, 2004
    Assignees: Technologies Echangeur Gaz Air (TEGA) Inc., Gaz Métropolitain, Centre des Technologies du Gaz Naturel
    Inventors: Laurent Giérula, Michel André Lamarche
  • Publication number: 20040104276
    Abstract: The present invention provides a system and single controller for receiving constant and individualized information from a plurality of air control systems. A single controller is capable of controlling and interacting with at least two separate air control systems to control an environmental characteristic, and in the process, reduces the costs associated with the manufacturing and every day operation of the individual systems. In addition, the controller is capable of intelligently communicating with the input and output devices of the system, and particularly with each individually interfaced appliance, such that the controller can adaptively control the system through the use of stored historical data.
    Type: Application
    Filed: September 25, 2003
    Publication date: June 3, 2004
    Applicant: Tjernlund Products, Inc.
    Inventors: John R. Weimer, Timothy G. Hoyez
  • Patent number: 6719207
    Abstract: An air comfort control device is disclosed, which has a furnace with a furnace fan, an air conditioner with an air conditioner fan positioned remote from the furnace fan, and a temperature controller responsive to temperature changes in air in a partially enclosed environment, wherein the temperature controller sends a fan output signal to both the furnace fan and the air conditioner fan to run together to circulate air through the partially enclosed environment. The thermostat controller may also provide for multiple operation settings, including both automatic and manual options. The air comfort control device may also have a motor controller capable of sending more than one voltage to a blower motor to set a furnace fan at more than one speed. The motor controller can be produced separate from an ignition controller where the ignition controller sets the gas valve to a high position or a low position.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: April 13, 2004
    Assignee: Dura Global Technologies, Inc.
    Inventor: John M. Kloster
  • Patent number: 6695046
    Abstract: A fan motor speed control system for controlling the fan motor speed of an air conditioning system includes a power output circuit including a power triac which is turned on and off by an opto-isolator connected to a pulse generator circuit for varying an AC voltage waveform imposed on the fan motor. The pulse generator circuit is connected to heating and cooling ramp circuits and a minimum speed circuit to provide a variable voltage signal imposed on the pulse generator circuit corresponding to the temperature difference sensed by a return air sensor and a heating or cooling sensor or by separate heating and cooling sensors disposed adjacent respective heating and cooling heat exchangers of the air conditioning system. An adjustable minimum speed circuit and a cutoff circuit are provided to control motor minimum speed or motor shutoff when a predetermined minimum speed is reached to prevent motor bearing failure or overheating.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: February 24, 2004
    Assignee: Hoffman Controls Corp.
    Inventors: Howard P. Byrnes, Walter William Bowman
  • Patent number: 6684944
    Abstract: A forced air heating and/or cooling system utilizing an induction type fan motor is controlled by a controller circuit which is operable to continuously vary the speed of the fan motor during a start-up phase and a shut-down phase of the heating and/or cooling cycle. The controller circuit includes terminals for connection to the source of electrical energy for the heating and/or cooling system and for connection to the system controls without altering the control function or circuitry thereof. The controller circuit includes temperature sensors which are operable to control start-up and shutdown of the fan motor over continuously variable speed operating cycles in response to sensed temperature of the air being circulated by the fan.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: February 3, 2004
    Assignee: Hoffman Controls Corp.
    Inventors: Howard P. Byrnes, Daniel B. Steffen
  • Publication number: 20030102382
    Abstract: Control apparatus for an environmental control system comprises input circuitry receiving environmental information and output circuitry for controlling an HVAC system. Processing circuitry in the controller configures the output circuitry based at least in part on the signals received on the input circuitry. Information about the status of the HVAC system may be transferred to system administrators using a wireless link.
    Type: Application
    Filed: October 7, 2002
    Publication date: June 5, 2003
    Inventors: Dale A. Gauthier, Guy D. Covert