Real Time Touch



new TOP 200 Companies filing patents this week

new Companies with the Most Patent Filings (2010+)




Real Time Touch

Lennox Industries Inc patents


Recent patent applications related to Lennox Industries Inc. Lennox Industries Inc is listed as an Agent/Assignee. Note: Lennox Industries Inc may have other listings under different names/spellings. We're not affiliated with Lennox Industries Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "L" | Lennox Industries Inc-related inventors


Manifold design to eliminate fractures on multistage heat exchanger coils

A system and method for a multistage condenser is described that reduces problems associated with temperature and pressure differential strains on tubes above and below a dead tube. Instead of connecting the dead tube to the i/o manifold, a physical separation is created. ... Lennox Industries Inc

Hvac systems and methods with refrigerant leak detection

Systems and methods are disclosed that involve detecting a flammable refrigerant associated with a heating, ventilating, and air conditioning (hvac) system. In one instance a damper covers an access port allowing a single sensor to monitor at least two separate spaces. ... Lennox Industries Inc

Operating a climate control system based on occupancy status

According to certain embodiments, a controller is operable to instruct a climate control system to operate according to an occupied mode or an unoccupied mode based on a pre-defined schedule. The occupied mode uses pre-defined settings associated with an occupied status, and the unoccupied mode uses pre-defined settings associated with an unoccupied status. ... Lennox Industries Inc

Communications between thermostat and rooftop unit of climate control system

According to certain embodiments, a thermostat is configured for use in a climate control system. The thermostat is operable to use two-way communication for communicating operational information between the thermostat and at least one rooftop unit (rtu) within the climate control system. ... Lennox Industries Inc

Sensor features for climate control system

According to certain embodiments, a device is configured for use in a climate control system. The device is operable to determine, based on configuration information, whether thermostat functionality of the device is enabled or disabled and whether sensor functionality of the device is enabled or disabled. ... Lennox Industries Inc

Method and apparatus for reduction of water re-evaporation in a dedicated dehumidifier/water heater

An apparatus that includes a refrigeration circuit that includes an evaporator, a first condenser and a compressor. The apparatus includes a refrigerant-water heat exchanger that includes a second condenser fluidly coupled to the refrigeration circuit. ... Lennox Industries Inc

Ice deflector for a fan housing

In various implementations, a fan system may include a housing and a fan. The fan may reside in an orifice of the housing. ... Lennox Industries Inc

Optimized low power air circulation in hvac systems

A system comprising a furnace, an impeller, and a controller. The impeller directs air into an environment through the furnace. ... Lennox Industries Inc

Ice sensor for a heat pump

In various implementations, an ice sensor may include heater(s), ice accumulation surface(s), and/or temperature sensor(s). During operation, heat from a heater may be provided to an ice accumulation surface and a temperature sensor(s) may determine temperature(s) of the ice accumulation surface. ... Lennox Industries Inc

Controlling air conditioner modes

In various implementations, a request for operation of an air conditioner may be received. The air conditioner may include a cooling mode and/or a dehumidifying mode. ... Lennox Industries Inc

Defrost control using fan data

In various implementations, frost in a vapor compression system may be controlled. A property of a fan may be determined. ... Lennox Industries Inc

System for calibration of a compressor unit in a heating, ventilation, and air conditioning system

The present invention provides for a system for calibrating operation of a compressor unit in a heating, ventilation, and air conditioning (hvac) system. A measuring device measures an operating parameter of the hvac system at a position where the measuring device is mounted on a refrigerant line of the hvac system. ... Lennox Industries Inc

Reversible heat pump with cycle enhancements

A cycle enhancement apparatus is provided. The apparatus has a first side entrance line and exit line, both connected to a first side of a refrigerant line, and a second side entrance line and exit line, both connected to a second side of the refrigerant line. ... Lennox Industries Inc

Method of and system for flame sensing and diagnostic

A method of determining presence of a flame in a furnace of a heating, ventilation, and air conditioning (hvac) system. The method comprises determining, using a controller, whether a processor signal (g) is active, responsive to a determination that the processor signal (g) is active, determining, using the controller prior to assertion of a flame-test input control signal, an output state of a first comparator, responsive to a determination that the output state of the first comparator is high, determining, using the controller prior to assertion of the flame-test input control signal, an output state of a second comparator, and responsive to a determination that the output state of the second comparator is low, transmitting, using the controller, a notification that a flame is present.. ... Lennox Industries Inc

01/11/18 / #20180009070

Heat exchanger having an interference rib

One aspect of this disclosure provides a heat exchanger that comprises a first panel half coupled to a corresponding second panel half that form a passageway having at least a first chamber adjacent an inlet end of the passageway and a second chamber and overlapping interference patterns formed in each of the first and second panel halves that extend along at least a portion of the length of the passageway and located between at least the first and second chambers.. . ... Lennox Industries Inc

01/04/18 / #20180003404

Method of defrosting an energy recovery ventilator unit

A method of defrosting an energy recovery ventilator unit. The method comprises defrosting an energy recovery ventilator unit. ... Lennox Industries Inc

01/04/18 / #20180003400

Hvac systems having improved four-way valve reheat control

In one instance, a heating, ventilating, and air conditioning (hvac) system includes a four-way reheat valve and is configured to accesses pressures within a conduit network to facilitate control of the reheat valve. The four-way reheat valve includes a piston valve slide within a main valve chamber and a pilot valve fluidly coupled to the main valve chamber and a compressor-suction conduit fluidly coupled to the four-way valve and to a compressor. ... Lennox Industries Inc

12/21/17 / #20170363302

Packaged air conditioning system having multiple utility connectivity

One aspect of this disclosure provides a packaged air conditioning & heating (pach) system that comprises a housing, an air cooling system contained within the housing and an air heating system contained within the housing. A first utility access point is located on a first side of the housing and a second utility access point is located on a second side of the housing. ... Lennox Industries Inc

12/14/17 / #20170356671

Method and apparatus for optimizing latent capacity of a variable speed compressor system

An hvac system includes an evaporator coil and a metering device fluidly coupled to the evaporator coil. The hvac system also includes a variable-speed circulation fan and a condenser coil fluidly coupled to the metering device. ... Lennox Industries Inc

12/14/17 / #20170356668

Method and system for optimizing a speed of at least one of a variable speed compressor and a variable speed circulation fan to improve latent capacity

An hvac system includes an evaporator coil and a metering device. The hvac system includes a variable-speed circulation fan and a condenser coil fluidly coupled to the metering device. ... Lennox Industries Inc

12/07/17 / #20170350595

Furnace, a method for operating a furnace and a furnace controller configured for the same

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.. ... Lennox Industries Inc

11/23/17 / #20170336117

Heat pump system having a maximum percent demand re-calculation algorithm controller

One aspect presents a controller that comprises a control board, a microprocessor located on and electrically coupled to the control board, and a memory coupled to the microprocessor and located on and electrically coupled to the control board. The controller is configured to receive an operating parameter signal and recalculate a first maximum heating % demand to a second maximum heating % demand that is greater than the first maximum heating % demand, when a value of the operating parameter signal exceeds a predetermined value, and operate the hp system based on the second maximum heating % demand.. ... Lennox Industries Inc

11/09/17 / #20170321910

Reflective ultraviolet light shield for a hvac unit

A heating, ventilating and air conditioning (hvac) unit. The unit comprises a heat exchanger or drain pan located inside a hvac housing that has one or more access openings and ultraviolet light-sensitive components therein. ... Lennox Industries Inc

11/09/17 / #20170320175

Furnace vent termination

One aspect of the disclosure provides a termination for use with a furnace. The termination, in one embodiment, includes a face plate including an exhaust region and an air supply region, the face plate having a front surface and an opposing back surface. ... Lennox Industries Inc

09/14/17 / #20170264091

Overvoltage recovery circuit and a controller and hvac system including the same

An overvoltage recovery circuit (orc), a controller for an hvac system and an hvac system are disclosed herein. In one embodiment, the orc includes: (1) a first supply voltage terminal connected to a first voltage supply, (2) a second supply voltage terminal connected to a second voltage supply, (3) interruption circuitry including a switch and a trip terminal connected to the second supply voltage terminal and (4) detection circuitry connected to the first supply voltage terminal and the switch of the interruption circuitry, the detection circuitry configured to operate the switch in response to an overvoltage condition at the first supply voltage terminal.. ... Lennox Industries Inc

09/07/17 / #20170254563

Condensate trap for heating-cooling systems

A condensation trap comprising an inlet chamber, a vent chamber and an outlet chamber. The inlet chamber is configured to receive condensate fluid through an external opening therein. ... Lennox Industries Inc

09/07/17 / #20170254553

Systems and methods for variable control and operation of hvac components

A method of controlling operations of an hvac system includes measuring temperature within an enclosed space, receiving a setpoint temperature within the enclosed space, calculating a temperature difference between the measured temperature and the received setpoint temperature, and determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a first predetermined temperature differential value. If the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to the first predetermined temperature differential value, determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a second predetermined temperature differential value. ... Lennox Industries Inc

08/24/17 / #20170241668

Flue baffle

A flue shield and mesh baffle are described for use within hvac systems and inside of a combustion chamber. The shield or baffle can be installed around the burner and within the combustion chamber to help dissipate heat that builds up as a result of the combustion of gas and air. ... Lennox Industries Inc

08/24/17 / #20170241666

Premix burner internal flue shield

A flue shield is described for use within hvac systems and inside of a combustion chamber. The flue shield can be installed around the burner and within the combustion chamber to help dissipate heat that builds up as a result of the combustion of gas and air. ... Lennox Industries Inc

08/17/17 / #20170234564

Method and apparatus for re-heat dehumidification utilizing a variable speed compressor system

A heating, ventilation, and air conditioning (hvac) system for regulating humidity of an enclosed space. The hvac system includes an evaporator coil. ... Lennox Industries Inc

08/10/17 / #20170227246

Method of and system for minimization of condenser-fan cycling for low ambient temperature

A method of controlling a heating, ventilation and air-conditioning (hvac) system includes measuring an ambient temperature and determining whether the ambient temperature is below a threshold temperature value. Responsive to a determination that the ambient temperature is below the threshold temperature value, measuring a condenser-fan cycle time of the hvac system and setting a speed of the compressor based on the measured condenser-fan cycle time.. ... Lennox Industries Inc

08/03/17 / #20170219262

Method of and system for detecting loss of refrigerant charge

A method of determining loss of refrigerant charge in a heating, ventilation, and air conditioning (hvac) system. The method includes receiving, using a controller, a plurality of temperature values from a plurality of temperature sensors placed at multiple locations within the hvac system and calculating, using the controller using the plurality of temperature values, a plurality of temperature-dependent values. ... Lennox Industries Inc

08/03/17 / #20170219248

Gravity-style furnace subunit inside a gas-induced draft furnace

A gravity-style furnace subunit for a gas-induced draft furnace. A heat conduction tube configured to be located inside of a gas-induced draft furnace cabinet, the heat conduction tube being separated from a row of draft-induced heat conduction tubes inside the cabinet. ... Lennox Industries Inc

08/03/17 / #20170219225

Dehumidifier having split condenser configuration

One aspect provides a dehumidifier that has a dehumidifying circuit and includes an evaporator, a first portion of a condensing circuit, and a first blower configured to direct a first air stream along a first flow path and through the evaporator and the first portion of the condensing circuit, for reducing the humidity of the first air stream. The dehumidifier also comprises a heat removing circuit, comprising a second blower configured to direct a second air stream along a second flow path and through a second portion of the condensing circuit for removing heat from the second portion of the condensing circuit. ... Lennox Industries Inc

08/03/17 / #20170219221

Furnace controller and a furnace that control a gas input rate to maintain a discharge air temperature

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. ... Lennox Industries Inc

07/27/17 / #20170211847

Furnace, a high fire ignition method for starting a furnace and a furnace controller configured for the same

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.. ... Lennox Industries Inc

07/27/17 / #20170211836

Heating furnace using self-calibration mode

A heating control method includes determining a first speed for an air circulation fan that corresponds with a temperature set point using a temperature map that maps temperatures to speeds of the air circulation fan and operating the air circulation fan at the first speed and a heating unit in a first configuration with at least one active burner from a plurality of burners where less than all of the burners are active when the heating unit is in the first configuration. The method further includes measuring a first temperature while operating the air circulation fan at the first speed, determining a temperature difference between the first temperature and the temperature set point, comparing the temperature difference to a temperature difference threshold, and updating the temperature map to map the first speed to the first temperature when the temperature difference is greater than the temperature difference threshold.. ... Lennox Industries Inc

07/27/17 / #20170211835

Heating furnace using rapid response heat control mode

A heating control system including an air circulation fan, a heating unit, a memory, and a microprocessor. The microprocessor is configured to operate the air circulation fan at a first speed and the heating unit in a first configuration where less than all of the burners are active. ... Lennox Industries Inc

07/27/17 / #20170211834

Heating furnace using discharge air heating control mode

A heating system comprising an air circulation fan, a heating unit, a memory that is operable to store a temperature map, and a microprocessor. The microprocessor is configured to operate the air circulation fan at a first speed and the heating unit in a first configuration. ... Lennox Industries Inc

07/27/17 / #20170211833

Space temperature and discharge air temperature control

A temperature control method includes obtaining, by a controller, a space temperature value, a space temperature set point, a discharge air temperature value, and a discharge air temperature set point. The method further includes determining a compressor speed using a first pi loop based on the space temperature set point and the space temperature value, and determining a supply fan speed using a second pi loop based on the discharge air temperature set point and the discharge air temperature value. ... Lennox Industries Inc

07/27/17 / #20170211824

Heating furnace using anti-stratification mode

A heating control device comprising input/output ports, a memory, and a microprocessor. The microprocessor is configured to transmit a first electrical signal to operate an air circulation fan at a first speed and a heating unit in a first configuration to achieve a first temperature rise where less than all of the burners are active. ... Lennox Industries Inc

07/27/17 / #20170211823

Heating furnace using auto heating commissioning mode

A heating control device including input/output ports, a memory operable to store smoke output thresholds, and a microprocessor. The microprocessor is configured to transmit a first electrical signal to operate an air circulation fan at a first speed and a heating unit in a first configuration to burn a lubricant at a first temperature where less than all of the burners are active. ... Lennox Industries Inc

07/27/17 / #20170211822

Heating furnace using gas pulse modulation temperature control mode

A heating control system that includes a heating unit with a constant burner and a pulsed burner. The constant burner is configured to remain active during operation. ... Lennox Industries Inc

07/27/17 / #20170211820

Heating furnace using energy saving mode

A heating control system including an air circulation fan, a heating unit, a memory, and a microprocessor. The microprocessor is configured to operate the air circulation fan at a first speed and the heating unit in a first configuration to achieve a first temperature rise where less than all of the burners are active. ... Lennox Industries Inc

07/20/17 / #20170204875

Fan systems

A fan system may generate an air flow during use. In various implementations, a fan system may include a fan and an orifice. ... Lennox Industries Inc

07/06/17 / #20170191732

Defrost control using fan data

In various implementations, frost in a vapor compression system may be controlled. A property of a fan may be determined. ... Lennox Industries Inc

07/06/17 / #20170191691

Erv global pressure demand control ventilation mode

An energy recovery ventilator includes first and second blowers, a pressure transducer and a controller. The first blower is configured to direct a first air stream into a first zone of an enclosure. ... Lennox Industries Inc

06/29/17 / #20170184332

System for calibration of a compressor unit in a heating, ventilation, and air conditioning system

The present invention provides for a system for calibrating operation of a compressor unit in a heating, ventilation, and air conditioning (hvac) system. A measuring device measures an operating parameter of the hvac system at a position where the measuring device is mounted on a refrigerant line of the hvac system. ... Lennox Industries Inc

06/22/17 / #20170176072

Intelligent defrost control method

A method of initiating a defrost cycle using a controller of a heat pump system includes measuring a temperature of an evaporator coil and determining whether the temperature of the evaporator coil is less than a freezing temperature. Responsive to a determination that the temperature of the evaporator coil is less than the freezing temperature, determining whether a current dew point temperature of air is greater than the temperature of the evaporator coil. ... Lennox Industries Inc

06/22/17 / #20170176049

Field conversion of a heating system to a multiple stage modulating gas fired heat exchanger

A heating system retrofitted to be operable through multiple heat stages at a constant fuel-air mixture includes a tube heat exchanger having a plurality of burners, a combustion air blower (cab) having an exhaust vent connected with the plurality of burners, the cab operable at a first speed and a second speed, a first valve connecting a fuel source to a first subset of the plurality of burners, and a second valve connecting a fuel source to a second subset of the plurality of burners.. . ... Lennox Industries Inc

06/22/17 / #20170176048

Multiple stage modulating gas fired heat exchanger

A modulating heating system includes a tube heat exchanger having a plurality of burners, a combustion air blower (cab) having an exhaust vent connected with the plurality of burners, the cab operable at a first speed and a second speed, a first valve connecting a fuel source to a first subset of the plurality of burners, and a second valve connecting a fuel source to a second subset of the plurality of burners, wherein the first and second valves each have a low fire rate and a high fire rate. The heat exchanger is operable through multiple heat stages at a constant fuel-air mixture.. ... Lennox Industries Inc

06/22/17 / #20170173205

Systems and methods for fabricating an air purification device

Systems and methods for fabricating an air purification device for use typically with heating, ventilating, and air conditioning (hvac) system are presented. The systems include at least one pleated insert disposed within a cartridge housing and proximate a source of electromagnetic radiation. ... Lennox Industries Inc

06/08/17 / #20170159985

Fan motor controller for use in an air conditioning system

One aspect provides an air conditioning system that includes a compressor housing, a motor having fan blades rotatably coupled thereto and located within the compressor housing. The motor has a rotation sensor associated with it that is configured to sense a rotation of the fan blades. ... Lennox Industries Inc

06/01/17 / #20170153052

Method and apparatus for reheat dehumidification with variable speed outdoor fan

An hvac system includes an indoor unit having a return air duct and a supply air duct in an enclosed space. The hvac system includes an outdoor unit having a variable-speed condenser fan. ... Lennox Industries Inc

06/01/17 / #20170153037

Method and apparatus for reheat dehumidification with variable air volume

The hvac system includes an evaporator coil and a metering device fluidly coupled to the evaporator coil via a distribution line. The hvac system includes a variable-speed circulation fan for circulating air around the evaporator coil. ... Lennox Industries Inc

05/11/17 / #20170130973

Economizer target temperature shift during mechanical cooling

A method and apparatus for cooling a supply of air is provided. A unit controller receives a cooling demand signal. ... Lennox Industries Inc

05/04/17 / #20170123441

Thermostat proximity sensor

A heating, ventilation, and air conditioning (hvac) device that includes a transmitter configured to generate a transmission signal. A splitter is operably coupled to the transmitter and is configured to output the transmission signal to an antenna and output a reflected signal to a microprocessor. ... Lennox Industries Inc

05/04/17 / #20170122624

Multi-stage system for cooling a refrigerant

According to certain embodiments, a refrigeration system comprises first and second evaporators, first and second compressors, and a gas cooler. The first and second evaporators receive liquid refrigerant from a flash tank and evaporate the refrigerant to cool a first case and a second case, respectively. ... Lennox Industries Inc

05/04/17 / #20170122612

Mixed air temperature sensor bypass

In an embodiment, a circuit for providing a mixed air temperature signal is provided. The circuit has a temperature input to an economizer controller, an air temperature sensor, a false air temperature device, and a switching device. ... Lennox Industries Inc

05/04/17 / #20170122610

Robust heating, ventilation, and air conditioning communication channels

A heating, ventilation, and air conditioning (hvac) communication method comprising generating, at a transmitter device, a primary signal and a secondary signal. Each of the signals comprise digital temperature data and digital humidity data. ... Lennox Industries Inc

04/13/17 / #20170102175

System and method to eliminate high pressure surges in hvac systems

A system and method are disclosed for relieving high pressure within an hvac system. A bypass line is provided that can direct refrigerant away from a condenser within the hvac system. ... Lennox Industries Inc

04/13/17 / #20170102174

Methods to eliminate high pressure surges in hvac systems

A system and method are disclosed for relieving high pressure within an hvac system. A bypass line is provided that can direct refrigerant away from an expansion device within the hvac system. ... Lennox Industries Inc

04/13/17 / #20170102173

Managing high pressure events in air conditioners

In various implementations, an air conditioner may include one or more compressors, more than one expansion device, and/or a microchannel condenser. High pressure events may occur during operation of the air conditioner and may be identified. ... Lennox Industries Inc

04/06/17 / #20170095762

System and method for replacing air filters

A system comprising a sensor coupled to a filter having a filter type. The sensor measures pressure drop across the filter and communicates with the controller. ... Lennox Industries Inc

03/23/17 / #20170082315

Economizer having source-specific damper blade assemblies and heating, ventilation and air conditioning unit employing the same

An economizer having a first air inlet, a second air inlet and an air outlet, a method of operating an economizer and a heating, ventilation and air conditioning (hvac) system employing the economizer. In one embodiment, the economizer includes: (1) a first damper blade assembly in fluid communication with the first air inlet and the air outlet and having a first plurality of damper blades configured to move in parallel and (2) a second damper blade assembly in fluid communication with the second air inlet and the air outlet and having a second plurality of damper blades configured to move in opposition.. ... Lennox Industries Inc

03/23/17 / #20170082308

Detecting and handling a blocked condition in the coil

A heating, ventilation, and air-conditioning (hvac) system comprises an outdoor unit with a fan and a coil, and a controller communicatively coupled to the fan and coil. The controller is operable to receive feedback data from the fan, where the feedback data from the fan corresponds to a power and a speed of the fan. ... Lennox Industries Inc

03/23/17 / #20170080532

Alternative-fuel gas orifice having principal-fuel gas orifice temperature profile and a heating, ventilation and air conditioning system incorporating the same

An alternative-fuel gas orifice, a gas furnace configured to employ the same and a method of designing a gas orifice. In one embodiment, the gas orifice includes: (1) a body having an aperture extending therethrough and including: (1a) a metering neck having a cross-sectional area such that a given flow rate of a gas is established when the gas is delivered to the gas orifice at a given alternative-fuel delivery pressure and (1b) a diffuser having a cross-sectional area larger than the cross-sectional area of the metering neck and a length such that the gas achieves a substantially laminar flow before exiting the diffuser.. ... Lennox Industries Inc

03/02/17 / #20170059219

System and method to optimize effectiveness of liquid line accumulator

A system and method are disclosed that provide an accumulator for helping to relieve pressure during pressure spikes in an hvac system. The accumulator can also be heated by various means, such as components of the condenser or evaporator, helping to achieve proper performance of the system. ... Lennox Industries Inc

03/02/17 / #20170059194

Device employable in different circuit configurations using parallel wiring harnesses, a hvac system employing the device and a method of manufacturing a hvac unit

A hvac unit manufacturing method and a hvac system are disclosed herein. In one embodiment, the hvac system includes: a controller having control board terminals, a parallel wiring harness having a first and a second connection header, the first connection header coupled to the control board terminals, and a switch having terminals. ... Lennox Industries Inc

03/02/17 / #20170059192

Furnace control board architecture

A system and method are disclosed that provide for a dual processor architecture in a furnace or hvac controller. One processor can control non-safety-critical components and is operable to receive software updates. ... Lennox Industries Inc

02/23/17 / #20170051960

System for managing lubricant levels in tandem compressor assemblies of an hvac system

The present invention provides a control system for managing lubricant levels in tandem compressor assemblies of a heating, ventilation, and air conditioning (hvac) system. In transitioning from a partial load that operates a first compressor but not a second compressor of a tandem assembly to a full load that operates both the first and the second compressor, a controller of the hvac system turns off both compressors of the tandem compressor assembly to allow time for lubricant levels to equalize between the first and the second compressor.. ... Lennox Industries Inc

02/16/17 / #20170045278

Active refrigerant charge compensation for refrigeration and air conditioning systems

A variable refrigerant charge refrigeration/air conditioner system is described that allows the refrigerant charge for the system to be altered based on operating or environmental factors. The system includes a main refrigerant loop holding a volume of refrigerant corresponding to a first level of refrigerant charge, a compressor in the main refrigerant loop, a condenser in the main refrigerant loop, and an evaporator in the main refrigerant loop. ... Lennox Industries Inc

02/09/17 / #20170035927

Air filtration media for air purification

An air filtration media for use with a heating ventilation and air condition (hvac) system is provided. The filtration media comprises an air filter media layer having a first and second side, a pco media layer having a first and second side, and a barrier layer positioned between the second side of the air filter media layer and the first side of the pco media layer. ... Lennox Industries Inc

02/02/17 / #20170030621

Low ambient cooling scheme and control

A system and method for controlling pressure during low ambient conditions when operating in a cooling mode are provided. One or more controllers may be operable to receive a measurement of a first head pressure at a refrigerant line and determine whether the first head pressure is below a pre-determined minimum head pressure threshold. ... Lennox Industries Inc

01/19/17 / #20170016439

System for heating a compressor assembly in an hvac system

The present invention provides a system for heating a compressor assembly of a heating, ventilation, and air conditioning (hvac) system. The system comprises a heat source for transferring thermal energy to a plurality of compressor units. ... Lennox Industries Inc

01/12/17 / #20170012563

Monitoring motor condition

In various implementations, a condition of a motor may be monitored based at least partially on time required to achieve a change in speed. A notification may be transmitted based on the condition of the motor.. ... Lennox Industries Inc

01/12/17 / #20170010032

Compressor operation management in air conditioners

In various implementations, compressor operation in an air conditioner may be managed by maintaining oil viscosity, a temperature differential, compressor sump temperature, and/or suction pressure. Properties of the air conditioner or portions thereof, such as the compressor, may be determined. ... Lennox Industries Inc








ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009



###

This listing is an abstract for educational and research purposes is only meant as a recent sample of applications filed, not a comprehensive history. Freshpatents.com is not affiliated or associated with Lennox Industries Inc in any way and there may be associated servicemarks. This data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Lennox Industries Inc with additional patents listed. Browse our Agent directory for other possible listings. Page by FreshPatents.com

###