F24H 15/38
Control of compressors of heat pumps
F24H15/38 (Control of compressors of heat pumps) appears on 101 US grants and 145 published applications in this corpus.
Search patents in F24H- Granted patents
- 101
- Published applications
- 145
- Assignees
- 68
- Inventors
- 303
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 5 |
| 2011 | 1 | 5 |
| 2012 | 0 | 8 |
| 2013 | 2 | 6 |
| 2014 | 1 | 6 |
| 2015 | 5 | 12 |
| 2016 | 7 | 13 |
| 2017 | 10 | 6 |
| 2018 | 11 | 11 |
| 2019 | 10 | 10 |
| 2020 | 5 | 5 |
| 2021 | 8 | 8 |
| 2022 | 5 | 7 |
| 2023 | 7 | 6 |
| 2024 | 2 | 4 |
| 2025 | 4 | 20 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heat pump device26 May 2026US 12,638,222 B2Fujitsu General Limited
- Hot water supply apparatus12 May 2026US 12,624,862 B2Daikin Industries, Ltd.
- Method of defrosting a heat pump device as well as a heat pump device13 Jan 2026US 12,523,412 B2Stiebel Eltron GmbH & Co. KG
- Heat-pump water heater16 Dec 2025US 12,498,142 B2Mitsubishi Electric Corporation
- Methods and systems for predictively preparing water provision system9 Dec 2025US 12,492,826 B2Octopus Energy Heating Limited
- Water heater and methods for operating the same3 Sep 2026US 2026/0258978 A1Bradford White Corporation
- Water heater and methods for operating the same3 Sep 2026US 2026/0258979 A1Bradford White Corporation
- Heat pump-type hot-water heating device6 Aug 2026US 2026/0227097 A1Fujitsu General Limited
- Hybrid heating system with humidity control4 Jun 2026US 2026/0153253 A1Midea Group Co., Ltd.
- Heat pump, operation method of heat pump, and server4 Jun 2026US 2026/0153268 A1LG Electronics Inc.
Most cited
By later US patents
- Refrigeration heat pump and auxiliary heating apparatus control system with switchover during low outdoor temperature79US 4,598,764 AHoneywell Inc. · 1986
- 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
- Control of space heating and water heating using variable speed heat pump35US 5,081,846 ACarrier Corporation · 1992
- Control apparatus and method for electric heater with external heat source35US 5,367,602 ALennox Industries Inc. · 1994