Gas heat pump and control method therefor
US-10823130-B2 · Nov 3, 2020 · US
Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F25B2313/021 |
| Official title | Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit |
| Display label | Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit |
| Total patents | 100 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 12 |
| 2017 | 9 |
| 2018 | 10 |
| 2019 | 16 |
| 2020 | 17 |
| 2021 | 6 |
| 2022 | 7 |
| 2023 | 5 |
| 2024 | 5 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Heat-pump air-conditioning hot-water supply device
US-10816224-B2 · Oct 27, 2020 · US
Heat pump system
US-2020149790-A1 · May 14, 2020 · US
Refrigeration apparatus
US-2020132314-A1 · Apr 30, 2020 · US
Reversible liquid suction gas heat exchanger
US-10578344-B2 · Mar 3, 2020 · US
Refrigeration device
US-2020033012-A1 · Jan 30, 2020 · US
Heat source unit and air conditioner having the heat source unit
US-2019376733-A1 · Dec 12, 2019 · US
Heat source unit and air conditioner having the heat source unit
US-2019376710-A1 · Dec 12, 2019 · US
Refrigerant transfer control in multi mode air conditioner with hot water generator
US-2019360731-A1 · Nov 28, 2019 · US
Air conditioner
US-10480800-B2 · Nov 19, 2019 · US
Air-conditioning apparatus
US-10473354-B2 · Nov 12, 2019 · US
Air conditioner
US-10465948-B2 · Nov 5, 2019 · US
Heat pump apparatus, air conditioner, and water heater
US-2019178254-A1 · Jun 13, 2019 · US
Air conditioner
US-10317113-B2 · Jun 11, 2019 · US
Air conditioner
US-10274208-B2 · Apr 30, 2019 · US
Heat exchange system with fixed and variable expansion devices in series
US-10267541-B2 · Apr 23, 2019 · US
Heat-pump air-conditioning hot-water supply device
US-2019072284-A1 · Mar 7, 2019 · US
Heat pump with an auxiliary heat exchanger for compressor discharge temperature control
US-10208987-B2 · Feb 19, 2019 · US
Heat pump system for vehicle
US-2019047369-A1 · Feb 14, 2019 · US
Air-conditioning apparatus
US-2019049154-A1 · Feb 14, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25B2313/021?
- CPC F25B2313/021 is the Cooperative Patent Classification code for “Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit.”
- How many patents are filed under CPC F25B2313/021 (Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit)?
- Our database includes 100 publications tagged with this CPC code.
- Is patent activity under CPC F25B2313/021 growing?
- Publication counts under this code: 5 in 2024 vs 6 in 2025 (latest complete years).