Humidity measurement
US11747359B2 · kind B2 · utility
0Cited by
7References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2020 |
| Grant date | Sep 5, 2023 |
| Priority date | — |
| Expiry date | Aug 5, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus such as a domestic oven incorporates an induction motor which drives a fan. The temperature of the circulating gas and the slip of the rotor, coupled to the fan, are used to determine the humidity of gas within the oven. The temperature of the stator coil is also taken into account. The fan is driven with relatively high torque to maximize the signal to noise ratio. The fan may be provided as the main fan or as a secondary fan dedicated to humidity measurement. In either case the fan has a long operational lifetime.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.