Powered capture hood
US8757008B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Sep 26, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A powered capture hood assembly to measure volumetric airflow in heating and cooling systems and for ventilation fans. The capture hood assembly has a hood for capturing or providing airflow, a formed nozzle structure attached thereto for conditioning the airflow and a blower apparatus with an adjustable fan attached to the opposite end of the nozzle structure. Subsequent the positioning of the hood over a supply duct, for example, a fan speed controller is utilized to adjust the fan in the tubular blower member to provide a zero or null pressure reading between the venturi portion of the nozzle structure and the local ambient room pressure. A pressure gauge is utilized to measure the pressure differential between a pressure reference tap of the formed nozzle structure and the pressure tap of the blower apparatus to determine volumetric airflow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.