F24F 11/873
By controlling refrigerant heaters
Official title: by controlling refrigerant heaters
F24F11/873 (By controlling refrigerant heaters) appears on 20 US grants and 25 published applications in this corpus.
Search patents in F24F- Granted patents
- 20
- Published applications
- 25
- Assignees
- 16
- Inventors
- 60
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 2 | 2 |
| 2021 | 0 | 4 |
| 2022 | 3 | 7 |
| 2023 | 4 | 4 |
| 2024 | 7 | 3 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Temperature and relative humidity controller9 Dec 2025US 12,492,839 B2Nelumbo Inc.
- Air conditioner15 Jul 2025US 12,359,838 B2Denso Corporation
- Contamination information estimation system and air treatment device26 Nov 2024US 12,152,799 B2Daikin Industries, Ltd.
- Device network system recognizing devices connected to an identical network system24 Sep 2024US 12,098,858 B2Daikin Industries, Ltd.
- Devices and systems for air conditioning units having a subcooling line7 May 2024US 11,976,840 B2Rheem Manufacturing Company
- Air conditioner26 Jun 2025US 2025/0207805 A1Denso Corporation
- System and method for controlling operation of a heat pump configured with an electric heater6 Mar 2025US 2025/0075931 A1
- Control method, apparatus, computer device and storage medium for preheating function of air conditioner3 Oct 2024US 2024/0328656 A1Guangdong Carrier Hvac Co., Ltd.
- Heating, ventilation, and air conditioning control system13 Jun 2024US 2024/0191903 A1Johnson Controls Tyco IP Holdings LLP
- Temperature and relative humidity controller30 May 2024US 2024/0175598 A1Nelumbo Inc.
Most cited
By later US patents
- Systems and methods for intelligent pic valves with agent interaction46US 10,739,029 B2Johnson Controls Technology Company · 2020
- Air-conditioner having refrigerant heater8US 5,169,063 AKabushiki Kaisha Toshiba · 1992
- System and method for operating an air conditioner unit having an auxiliary electric heater1US 11,674,706 B2Haier US Appliance Solutions, Inc. · 2023
- Air conditioner1US 8,082,749 B2Sanyo Electric Co., Ltd. · 2011