Der-Kai Hung

Person

Dallas, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Controlling metering devices
- Patent number 12,000,632
- Issue date Jun 4, 2024
- Lennox Industries Inc.
- Eric Perez
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Cooling system
- Patent number 11,885,570
- Issue date Jan 30, 2024
- Lennox Industries Inc.
- Vijaykumar Sathyamurthi
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Variable refrigerant flow system with reheating of dehumidified air
- Patent number 11,828,486
- Issue date Nov 28, 2023
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Methods and systems for operating HVAC systems in low load conditions
- Patent number 11,573,038
- Issue date Feb 7, 2023
- Lennox Industries Inc.
- Der-Kai Hung
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Controlling metering devices
- Patent number 11,512,882
- Issue date Nov 29, 2022
- Lennox Industries Inc.
- Eric Perez
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Methods and systems for operating HVAC systems in low load conditions
- Patent number 11,493,250
- Issue date Nov 8, 2022
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Control scheme for automatic fan mode for use with variable refrige...
- Patent number 11,397,040
- Issue date Jul 26, 2022
- Lennox Industries Inc.
- Ben Hobson
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Cooling system
- Patent number 11,384,987
- Issue date Jul 12, 2022
- Lennox Industries Inc.
- Vijaykumar Sathyamurthi
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Variable refrigerant flow system with reheating of dehumidified air
- Patent number 11,255,553
- Issue date Feb 22, 2022
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Methods and systems for operating HVAC systems in low load conditions
- Patent number 11,092,368
- Issue date Aug 17, 2021
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Variable speed blower control for HVAC systems
- Patent number 10,801,765
- Issue date Oct 13, 2020
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Controlling metering devices
- Patent number 10,690,386
- Issue date Jun 23, 2020
- Lennox Industries Inc.
- Eric Perez
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Methods and systems for operating HVAC systems in low load conditions
- Patent number 10,365,025
- Issue date Jul 30, 2019
- Lennox Industries, Inc.
- Der-Kai Hung
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Controlling air conditioning systems
- Patent number 10,337,777
- Issue date Jul 2, 2019
- Lennox Industries, Inc.
- Eric Perez
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Variable refrigerant flow system operation in low ambient conditions
- Patent number 10,337,780
- Issue date Jul 2, 2019
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Tandem compressor discharge pressure and temperature control logic
- Patent number 10,197,304
- Issue date Feb 5, 2019
- Lennox Industries Inc.
- Harold Gene Havard
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
System for operating an HVAC system having tandem compressors
- Patent number 10,156,396
- Issue date Dec 18, 2018
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
System for managing lubricant levels in tandem compressor assemblie...
- Patent number 10,047,965
- Issue date Aug 14, 2018
- Lennox Industries Inc.
- David Mackey
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
System for managing lubricant levels in tandem compressor assemblie...
- Patent number 9,989,288
- Issue date Jun 5, 2018
- Lennox Industries Inc.
- Aylan Him
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Charge management for air conditioning
- Patent number 9,927,135
- Issue date Mar 27, 2018
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
System for controlling operation of an HVAC system having tandem co...
- Patent number 9,759,468
- Issue date Sep 12, 2017
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Airflow-confirming HVAC systems and methods with variable speed blower
- Patent number 9,692,347
- Issue date Jun 27, 2017
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Inverter controller, method of operation thereof and field-installa...
- Patent number 9,677,797
- Issue date Jun 13, 2017
- Lennox Industries Inc.
- Harold Gene Havard
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
System for operating an HVAC system having tandem compressors
- Patent number 9,581,371
- Issue date Feb 28, 2017
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
System for managing lubricant levels in tandem compressor assemblie...
- Patent number 9,488,400
- Issue date Nov 8, 2016
- Lennox Industries Inc.
- Aylan Him
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Charge management for air conditioning
- Patent number 9,297,565
- Issue date Mar 29, 2016
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Pressure regulation of an air conditioner
- Patent number 8,931,288
- Issue date Jan 13, 2015
- Lennox Industries Inc.
- Yi Qu
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Automatic variable speed motor drive bypass
- Patent number 8,779,698
- Issue date Jul 15, 2014
- Lennox Industries Inc.
- Harold Gene Havard
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
VARIABLE REFRIGERANT FLOW SYSTEM
- Publication number 20240044528
- Publication date Feb 8, 2024
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Application
CONTROLLING METERING DEVICES
- Publication number 20230053380
- Publication date Feb 23, 2023
- Lennox Industries Inc.
- Eric Perez
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
CONTROL SCHEME FOR AUTOMATIC FAN MODE FOR USE WITH VARIABLE REFRIGE...
- Publication number 20220307755
- Publication date Sep 29, 2022
- Lennox Industries Inc.
- Ben Hobson
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
COOLING SYSTEM
- Publication number 20220282927
- Publication date Sep 8, 2022
- LENNOX INDUSTRIES, INC.
- Vijaykumar Sathyamurthi
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
VARIABLE REFRIGERANT FLOW SYSTEM WITH REHEATING OF DEHUMIDIFIED AIR
- Publication number 20220107097
- Publication date Apr 7, 2022
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Application
METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS
- Publication number 20210341197
- Publication date Nov 4, 2021
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS
- Publication number 20210140693
- Publication date May 13, 2021
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
CONTROL SCHEME FOR AUTOMATIC FAN MODE FOR USE WITH VARIABLE REFRIGE...
- Publication number 20210140700
- Publication date May 13, 2021
- Lennox Industries Inc.
- Ben Hobson
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
Variable Refrigerant Flow System
- Publication number 20210063030
- Publication date Mar 4, 2021
- LENNOX INDUSTRIES, INC.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Application
COOLING SYSTEM
- Publication number 20210048251
- Publication date Feb 18, 2021
- LENNOX INDUSTRIES, INC.
- Vijaykumar Sathyamurthi
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
CONTROLLING METERING DEVICES
- Publication number 20200300520
- Publication date Sep 24, 2020
- Lennox Industries Inc.
- Eric Perez
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
VARIABLE SPEED BLOWER CONTROL FOR HVAC SYSTEMS
- Publication number 20200011579
- Publication date Jan 9, 2020
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Application
METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS
- Publication number 20190323750
- Publication date Oct 24, 2019
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
SYSTEM FOR OPERATING AN HVAC SYSTEM HAVING TANDEM COMPRESSORS
- Publication number 20170167777
- Publication date Jun 15, 2017
- Lennox lndustries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
System and Method to Eliminate High Pressure Surges in HVAC Systems
- Publication number 20170102175
- Publication date Apr 13, 2017
- Lennox Industries Inc.
- Wei Chen
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
Methods to Eliminate High Pressure Surges in HVAC Systems
- Publication number 20170102174
- Publication date Apr 13, 2017
- Lennox Industries Inc.
- Wei Chen
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
SYSTEM FOR MANAGING LUBRICANT LEVELS IN TANDEM COMPRESSOR ASSEMBLIE...
- Publication number 20170051960
- Publication date Feb 23, 2017
- Lennox Industries Inc.
- Aylan Him
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
LOW AMBIENT COOLING SCHEME AND CONTROL
- Publication number 20170030621
- Publication date Feb 2, 2017
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
Charge Management for Air Conditioning
- Publication number 20160209056
- Publication date Jul 21, 2016
- Lennox Industries Inc.
- Der-Kai Hung
- F24 - HEATING RANGES VENTILATING
Information Patent Application
VARIABLE REFRIGERANT FLOW SYSTEM OPERATION IN LOW AMBIENT CONDITIONS
- Publication number 20160161163
- Publication date Jun 9, 2016
- Lennox Industries Inc.
- Der-Kai Hung
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS
- Publication number 20160146522
- Publication date May 26, 2016
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
System for Managing Lubricant Levels in Tandem Compressor Assemblie...
- Publication number 20160010885
- Publication date Jan 14, 2016
- Lennox Industries Inc.
- David Mackey
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information Patent Application
AIRFLOW-CONFIRMING HVAC SYSTEMS AND METHODS WITH VARIABLE SPEED BLOWER
- Publication number 20150362205
- Publication date Dec 17, 2015
- Lennox Industries Inc.
- Der-Kai Hung
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
SYSTEM FOR MANAGING LUBRICANT LEVELS IN TANDEM COMPRESSOR ASSEMBLIE...
- Publication number 20150345848
- Publication date Dec 3, 2015
- Lennox Industries Inc.
- Aylan Him
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
TANDEM COMPRESSOR DISCHARGE PRESSURE AND TEMPERATURE CONTROL LOGIC
- Publication number 20150338133
- Publication date Nov 26, 2015
- Lennox Industries Inc.
- Harold Gene Havard
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
SYSTEM FOR OPERATING AN HVAC SYSTEM HAVING TANDEM COMPRESSORS
- Publication number 20150267953
- Publication date Sep 24, 2015
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
SYSTEM FOR CONTROLLING OPERATION OF AN HVAC SYSTEM HAVING TANDEM CO...
- Publication number 20150267952
- Publication date Sep 24, 2015
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
PRESSURE REGULATION OF AN AIR CONDITIONING SYSTEM
- Publication number 20150121908
- Publication date May 7, 2015
- Lennox Industries Inc.
- Yi Qu
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
CHARGE MANAGEMENT FOR AIR CONDITIONING
- Publication number 20150052937
- Publication date Feb 26, 2015
- Lennox Industries Inc.
- Der-Kai Hung
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
Pressure Regulation of an Air Conditioner
- Publication number 20140109605
- Publication date Apr 24, 2014
- Yi Qu
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...

Der-Kai Hung

Person

Patents Grantslast 30 patents

Controlling metering devices

Cooling system

Variable refrigerant flow system with reheating of dehumidified air

Methods and systems for operating HVAC systems in low load conditions

Controlling metering devices

Methods and systems for operating HVAC systems in low load conditions

Control scheme for automatic fan mode for use with variable refrige...

Cooling system

Variable refrigerant flow system with reheating of dehumidified air

Methods and systems for operating HVAC systems in low load conditions

Variable speed blower control for HVAC systems

Controlling metering devices

Methods and systems for operating HVAC systems in low load conditions

Controlling air conditioning systems

Variable refrigerant flow system operation in low ambient conditions

Tandem compressor discharge pressure and temperature control logic

System for operating an HVAC system having tandem compressors

System for managing lubricant levels in tandem compressor assemblie...

System for managing lubricant levels in tandem compressor assemblie...

Charge management for air conditioning

System for controlling operation of an HVAC system having tandem co...

Airflow-confirming HVAC systems and methods with variable speed blower

Inverter controller, method of operation thereof and field-installa...

System for operating an HVAC system having tandem compressors

System for managing lubricant levels in tandem compressor assemblie...

Charge management for air conditioning

Pressure regulation of an air conditioner

Automatic variable speed motor drive bypass

Patents Applicationslast 30 patents

VARIABLE REFRIGERANT FLOW SYSTEM

CONTROLLING METERING DEVICES

CONTROL SCHEME FOR AUTOMATIC FAN MODE FOR USE WITH VARIABLE REFRIGE...

COOLING SYSTEM

VARIABLE REFRIGERANT FLOW SYSTEM WITH REHEATING OF DEHUMIDIFIED AIR

METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS

METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS

CONTROL SCHEME FOR AUTOMATIC FAN MODE FOR USE WITH VARIABLE REFRIGE...

Variable Refrigerant Flow System

COOLING SYSTEM

CONTROLLING METERING DEVICES

VARIABLE SPEED BLOWER CONTROL FOR HVAC SYSTEMS

METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS

SYSTEM FOR OPERATING AN HVAC SYSTEM HAVING TANDEM COMPRESSORS

System and Method to Eliminate High Pressure Surges in HVAC Systems

Methods to Eliminate High Pressure Surges in HVAC Systems

SYSTEM FOR MANAGING LUBRICANT LEVELS IN TANDEM COMPRESSOR ASSEMBLIE...

LOW AMBIENT COOLING SCHEME AND CONTROL

Charge Management for Air Conditioning

VARIABLE REFRIGERANT FLOW SYSTEM OPERATION IN LOW AMBIENT CONDITIONS

METHODS AND SYSTEMS FOR OPERATING HVAC SYSTEMS IN LOW LOAD CONDITIONS

System for Managing Lubricant Levels in Tandem Compressor Assemblie...

AIRFLOW-CONFIRMING HVAC SYSTEMS AND METHODS WITH VARIABLE SPEED BLOWER

SYSTEM FOR MANAGING LUBRICANT LEVELS IN TANDEM COMPRESSOR ASSEMBLIE...

TANDEM COMPRESSOR DISCHARGE PRESSURE AND TEMPERATURE CONTROL LOGIC

SYSTEM FOR OPERATING AN HVAC SYSTEM HAVING TANDEM COMPRESSORS

SYSTEM FOR CONTROLLING OPERATION OF AN HVAC SYSTEM HAVING TANDEM CO...

PRESSURE REGULATION OF AN AIR CONDITIONING SYSTEM

CHARGE MANAGEMENT FOR AIR CONDITIONING

Pressure Regulation of an Air Conditioner