F24H 15/20
Control of fluid heaters: characterised by control inputs
Official title: characterised by control inputs
F24H15/20 (Control of fluid heaters: characterised by control inputs) appears on 1,576 US grants and 2,028 published applications in this corpus.
Search patents in F24H- Granted patents
- 1,576
- Published applications
- 2,028
- Assignees
- 739
- Inventors
- 3,306
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 11 | 0 |
| 1982 | 9 | 0 |
| 1983 | 11 | 0 |
| 1984 | 7 | 0 |
| 1985 | 16 | 0 |
| 1986 | 19 | 0 |
| 1987 | 11 | 0 |
| 1988 | 9 | 0 |
| 1989 | 6 | 0 |
| 1990 | 9 | 0 |
| 1991 | 9 | 0 |
| 1992 | 11 | 0 |
| 1993 | 8 | 0 |
| 1994 | 13 | 0 |
| 1995 | 10 | 0 |
| 1996 | 11 | 0 |
| 1997 | 6 | 0 |
| 1998 | 11 | 0 |
| 1999 | 15 | 0 |
| 2000 | 25 | 0 |
| 2001 | 21 | 7 |
| 2002 | 13 | 11 |
| 2003 | 20 | 21 |
| 2004 | 17 | 19 |
| 2005 | 17 | 26 |
| 2006 | 20 | 27 |
| 2007 | 14 | 40 |
| 2008 | 9 | 21 |
| 2009 | 22 | 51 |
| 2010 | 21 | 78 |
| 2011 | 25 | 63 |
| 2012 | 45 | 83 |
| 2013 | 43 | 92 |
| 2014 | 49 | 96 |
| 2015 | 57 | 110 |
| 2016 | 80 | 98 |
| 2017 | 76 | 89 |
| 2018 | 95 | 122 |
| 2019 | 105 | 116 |
| 2020 | 83 | 118 |
| 2021 | 87 | 138 |
| 2022 | 105 | 90 |
| 2023 | 95 | 94 |
| 2024 | 78 | 153 |
| 2025 | 78 | 151 |
| 2026 | 48 | 114 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F24H 15/212Temperature of the water969
- F24H 15/281Input from user498
- F24H 15/238Flow rate399
- F24H 15/242Pressure217
- F24H 15/254Room temperature204
- F24H 15/269Time134
- F24H 15/25Temperature of the heat-generating means in the heater121
- F24H 15/246Water level104
All 20 subgroupsShow fewer
- F24H 15/258Outdoor temperature96
- F24H 15/208Temperature of the air after heating80
- F24H 15/227Temperature of the refrigerant in heat pump cycles53
- F24H 15/265Occupancy47
- F24H 15/235Temperature of exhaust gases45
- F24H 15/204Temperature of the air before heating42
- F24H 15/262Weather information or forecast29
- F24H 15/288Accumulation of deposits29
- F24H 15/277Price26
- F24H 15/296Information from neighbouring devices23
- F24H 15/292Metering of electricity sold to the grid16
- F24H 15/273Address or location8
Recent patents
- Water heater having highly efficient and compact heat exchanger6 Oct 2026US RE51,053 E1A. O. Smith Corporation
- Heater bundles having variable power output within zones22 Sep 2026US 12,742,570 B2Watlao Electric Manufacturing Company
- Warming device capable of determining lowering of warming function, image forming apparatus, and determination method1 Sep 2026US 12,722,379 B2KYOCERA Document Solutions Inc.
- Machine learning of heat pump system water usage patterns for optimized heat pump performance1 Sep 2026US 12,723,778 B2Bradford White Corporation
- Furnace control systems and methods25 Aug 2026US 12,716,617 B2Johnson Controls Light Commercial IP GmbH
- Energy buffering using a heat pump8 Oct 2026US 2026/0309339 A1Mixergy Limited
- Water heating system and device8 Oct 2026US 2026/0309340 A1Mixergy Limited
- Heating device for a steam generator8 Oct 2026US 2026/0309366 A1Yuyao Hengxi Technology Co., Ltd.
- Hot water supply system8 Oct 2026US 2026/0309368 A1Mitsubishi Electric Corporation
- Smart electric heater for bathing installations8 Oct 2026US 2026/0309370 A1Balboa Water Group, Inc.
Most cited
By later US patents
- Self-programmable temperature control system for a heating and cooling system328US 5,088,645 A1992
- Fluid heating control system199US 6,246,831 B1David Seitz · 2001
- Integrated appliance control system186US 6,059,195 ATridelta Industries, Inc. · 2000
- Automatic hot water supply apparatus152US 5,058,804 AMatsushita Electric Industrial Co., Ltd. · 1991
- Control system for a water heater150US 5,797,358 AAOS Holding Company · 1998