Air mixer for compressed air foam fire-extinguishing system and fire-extinguishing system
US12370392B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 1, 2022 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Aug 1, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C31/28
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present disclosure provides an air mixer for a compressed air foam (CAF) fire-extinguishing system. A foam concentrate and compressed air are respectively transported by a liquid inlet pipe and an air inlet pipe. When the compressed air and the foam concentrate enter a straight pipe through a first tapered pipe, they reach an outlet end of the first tapered pipe through a path narrowing due to different cross-section diameters at two ends of the first tapered pipe, and there is a compression process. Under an action of a high-pressure airflow, the foam concentrate is fully mixed. The mixed foam concentrate reaches a porous plate of the straight pipe and can be mixed secondarily. When the foam concentrate is discharged by a second tapered pipe, a flow path widens and there is a release process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.