F24H 15/227
Temperature of the refrigerant in heat pump cycles
F24H15/227 (Temperature of the refrigerant in heat pump cycles) appears on 53 US grants and 76 published applications in this corpus.
Search patents in F24H- Granted patents
- 53
- Published applications
- 76
- Assignees
- 34
- Inventors
- 157
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 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 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 4 |
| 2011 | 0 | 3 |
| 2012 | 0 | 1 |
| 2013 | 2 | 2 |
| 2014 | 1 | 4 |
| 2015 | 2 | 7 |
| 2016 | 1 | 4 |
| 2017 | 6 | 5 |
| 2018 | 8 | 9 |
| 2019 | 5 | 3 |
| 2020 | 7 | 2 |
| 2021 | 2 | 6 |
| 2022 | 1 | 1 |
| 2023 | 2 | 0 |
| 2024 | 2 | 9 |
| 2025 | 4 | 9 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heating systems9 Jun 2026US 12,650,244 B2Mixergy Limited
- Hybrid water heater10 Mar 2026US 12,571,560 B2Rheem Manufacturing Company
- Heat-pump water heater16 Dec 2025US 12,498,142 B2Mitsubishi Electric Corporation
- Air funnel for a heat pump system of a water heater15 Jul 2025US 12,359,845 B1Bradford White Corporation
- Combined air conditioning and water heating via expansion valve regulation25 Feb 2025US 12,235,026 B2Rheem Manufacturing Company
- Heating installation1 Oct 2026US 2026/0298483 A1Energy Machines ApS
- Water heater system diagnostics3 Sep 2026US 2026/0258977 A1Bradford White Corporation
- Heat pump-type hot-water heating device6 Aug 2026US 2026/0227097 A1Fujitsu General Limited
- Smart Fluid Heating Systems and Methods30 Jul 2026US 2026/0218917 A1Rheem Manufacturing Company
- Air funnel for a heat pump system of a water heater16 Oct 2025US 2025/0321023 A1Bradford White Corporation
Most cited
By later US patents
- Microprocessor control for a heat pump water heater70US 6,212,894 B1WaterFurnace International, Inc. · 2001
- Hot-water supply system with heat pump cycle37US 6,467,289 B2Central Research Institute of Electric Power Industry · 2002
- Method and apparatus for integrating operation of a heat pump and a separate heating source34US 4,476,920 ACarrier Corporation · 1984
- Residential heat pump water heater34US 8,422,870 B2General Electric Company · 2013
- Heat-pump system with refrigerant charge diagnostics16US 9,765,979 B2Emerson Climate Technologies, Inc. · 2017