Thermal flowmeter including an inclined passage
US10718647B2 · kind B2 · utility
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4References
9Claims
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Key dates
| Filing date | Apr 20, 2017 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Aug 8, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/684
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermal flowmeter includes: a sub-passage (307) that takes a part of a gas (30) to be measured flowing through a main passage; and a flow measurement unit (451) disposed inside the sub-passage (307). The sub-passage (307) includes: a first passage (351) provided on a measurement surface (451a) side of the flow measurement unit (451); a second passage (352) provided on a back surface (451b) side of the flow measurement unit (451); and an inclined passage (361) provided on an upstream side of an inlet (351a) of the first passage in a forward flow direction F of the gas (30) to be measured in the first passage (351).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.