F24F 5/0046
Air-conditioning systems or apparatus not covered by f24f1/00 or f24f3/00: using natural
Official title: {using natural energy, e.g. solar energy, energy from the ground}
F24F5/0046 (Air-conditioning systems or apparatus not covered by f24f1/00 or f24f3/00: using natural) appears on 662 US grants and 671 published applications in this corpus.
Search patents in F24F- Granted patents
- 662
- Published applications
- 671
- Assignees
- 346
- Inventors
- 1,256
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 21 | 0 |
| 1978 | 19 | 0 |
| 1979 | 19 | 0 |
| 1980 | 22 | 0 |
| 1981 | 19 | 0 |
| 1982 | 12 | 0 |
| 1983 | 18 | 0 |
| 1984 | 13 | 0 |
| 1985 | 8 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 1 |
| 2002 | 5 | 3 |
| 2003 | 10 | 10 |
| 2004 | 6 | 15 |
| 2005 | 4 | 8 |
| 2006 | 7 | 6 |
| 2007 | 2 | 19 |
| 2008 | 7 | 17 |
| 2009 | 4 | 32 |
| 2010 | 10 | 28 |
| 2011 | 12 | 39 |
| 2012 | 10 | 41 |
| 2013 | 16 | 14 |
| 2014 | 22 | 32 |
| 2015 | 21 | 28 |
| 2016 | 17 | 33 |
| 2017 | 20 | 26 |
| 2018 | 29 | 46 |
| 2019 | 28 | 29 |
| 2020 | 31 | 49 |
| 2021 | 30 | 34 |
| 2022 | 26 | 40 |
| 2023 | 30 | 31 |
| 2024 | 39 | 37 |
| 2025 | 30 | 31 |
| 2026 | 17 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F24F 2005/0064Using solar energyIndexing code250
- F24F 2005/0057Receiving heat-exchange fluid from a closed circuit in the groundIndexing code92
- F24F 5/005Using energy from the ground by air circulation57
- F24F 2005/0053Receiving heat-exchange fluid from a wellIndexing code23
- F24F 2005/006Receiving heat-exchange fluid from the drinking or sanitary water supply circuitIndexing code12
Recent patents
- Multi-connected air conditioner with refrigerant and water system25 Aug 2026US 12,716,609 B2Tsinghua University
- Energy management systems18 Aug 2026US 12,710,184 B2
- HVAC-centric energy hub system18 Aug 2026US 12,712,368 B2Carrier Corporation
- System for adjusting and controlling temperature of intelligent new energy farmhouse integrated with tunnel wind and solar energy7 Jul 2026US 12,674,586 B2Beijing Anxing Hi-Tech New Energy Development Co., Ltd.
- Devices and methods for concentrated radiative cooling23 Jun 2026US 12,663,185 B2Purdue Research Foundation
- Device and method for controlling cooling and heating in home and system therefor1 Oct 2026US 2026/0298491 A1LG Electronics Inc.
- Thermal storage system and method17 Sep 2026US 2026/0276319 A1Other Lab, LLC
- System for supplying electricty, heat, and water using a stirling engine powered by sustainable energy sources10 Sep 2026US 2026/0266488 A1
- Loopback Heat Harvesting System20 Aug 2026US 2026/0243178 A1Jemm's Labs
- Recursive and Encapsulated Heat Harvesting System20 Aug 2026US 2026/0243179 A1Jemm's Labs
Most cited
By later US patents
- Heat pump air conditioning system132US 4,420,947 AMitsubishi Denki Kabushiki Kaisha · 1983
- Air conditioning apparatus utilizing solar energy and method99US 4,222,244 AGershon Meckler Associates, P.C. · 1980
- Umbrella apparatus97US 6,612,713 B1World Factory, Inc. · 2003
- Geothermal storage heating and cooling system91US 4,375,831 A1983
- Solar powered heat reclamation air conditioning system90US 4,024,908 A1977