Control scheme for automatic fan mode for use with variable refrigerant flow systems
US-12560369-B2 · Feb 24, 2026 · US
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Hung Der-Kai patents
Hung Der-Kai is listed as an inventor on 57 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Hung Der-Kai |
| Total patents | 57 |
| First publication | Jan 13, 2015 |
| Latest publication | Feb 24, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
Variable refrigerant flow system
US-12158282-B2 · Dec 3, 2024 · US
Controlling metering devices
US-12000632-B2 · Jun 4, 2024 · US
Variable refrigerant flow system
US-2024044528-A1 · Feb 8, 2024 · US
Cooling system
US-11885570-B2 · Jan 30, 2024 · US
Variable refrigerant flow system with reheating of dehumidified air
US-11828486-B2 · Nov 28, 2023 · US
Controlling metering devices
US-2023053380-A1 · Feb 23, 2023 · US
Methods and systems for operating HVAC systems in low load conditions
US-11573038-B2 · Feb 7, 2023 · US
Controlling metering devices
US-11512882-B2 · Nov 29, 2022 · US
Methods and systems for operating HVAC systems in low load conditions
US-11493250-B2 · Nov 8, 2022 · US
Recent patents
Latest publications not already listed above.
Control scheme for automatic fan mode for use with variable refrigerant flow systems
US-2022307755-A1 · Sep 29, 2022 · US
Cooling system
US-2022282927-A1 · Sep 8, 2022 · US
Control scheme for automatic fan mode for use with variable refrigerant flow systems
US-11397040-B2 · Jul 26, 2022 · US
Cooling system
US-11384987-B2 · Jul 12, 2022 · US
Variable refrigerant flow system with reheating of dehumidified air
US-2022107097-A1 · Apr 7, 2022 · US
Variable refrigerant flow system with reheating of dehumidified air
US-11255553-B2 · Feb 22, 2022 · US
Methods and systems for operating hvac systems in low load conditions
US-2021341197-A1 · Nov 4, 2021 · US
Methods and systems for operating HVAC systems in low load conditions
US-11092368-B2 · Aug 17, 2021 · US
Methods and systems for operating hvac systems in low load conditions
US-2021140693-A1 · May 13, 2021 · US
Control scheme for automatic fan mode for use with variable refrigerant flow systems
US-2021140700-A1 · May 13, 2021 · US
Variable Refrigerant Flow System
US-2021063030-A1 · Mar 4, 2021 · US
Cooling system
US-2021048251-A1 · Feb 18, 2021 · US
Variable speed blower control for HVAC systems
US-10801765-B2 · Oct 13, 2020 · US
Controlling metering devices
US-2020300520-A1 · Sep 24, 2020 · US
Controlling metering devices
US-10690386-B2 · Jun 23, 2020 · US
Variable speed blower control for hvac systems
US-2020011579-A1 · Jan 9, 2020 · US
Methods and systems for operating hvac systems in low load conditions
US-2019323750-A1 · Oct 24, 2019 · US
Methods and systems for operating HVAC systems in low load conditions
US-10365025-B2 · Jul 30, 2019 · US
Variable refrigerant flow system operation in low ambient conditions
US-10337780-B2 · Jul 2, 2019 · US
Controlling air conditioning systems
US-10337777-B2 · Jul 2, 2019 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Lennox Ind Inc | 57 |
| Hung Der-Kai | 2 |
| Perez Eric | 2 |
| Niemann Shawn | 2 |
| Hung Der Kai | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| Y02B30/70 | 30 |
| F25B49/02 | 29 |
| F25B13/00 | 23 |
| F25B41/20 | 17 |
| F25B49/022 | 15 |