Method and apparatus for determining the total flow rate in a ventilation installation
US5426975A · kind A · utility
11Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1993 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Dec 3, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2270/301
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining the total flow rate of air flowing through a ventilation installation with a free suction fan (15) is described. The flow rate or a corresponding pressure is determined by measurement of the partial flow rate or a corresponding pressure at at least one measurement point in the vicinity of the inlet opening of the fan. A measurement tube (20) open at both ends is suitably used, and oriented with its longitudinal axis in the inflow direction, flow sensors being arranged inside the measurement tube. In this way, there is obtained good measurement accuracy within a large flow range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.