Thermal flow meter including a protrusion protruding from a circuit package body and a temperature detection element buried in the protrusion
US9733113B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2013 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Dec 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/043
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is a thermal flow meter to improve the measurement accuracy of a temperature detector provided in a thermal flow meter. The thermal flow meter includes a bypass passage through which a measurement target gas 30 flowing through a main passage flows, and a circuit package 400 which includes a measurement circuit for measuring a flow rate of the measurement target gas 30 flowing through the bypass passage and a temperature detecting portion 452 for detecting a temperature of the measurement target gas. The circuit package 400 includes a circuit package body which is molded by a resin to internally envelope the measurement circuit and a protrusion 424 molded by the resin. The temperature detecting portion 452 is provided in the leading end portion of the protrusion 424, and at least the leading end portion of the protrusion protrudes to the outside from a housing 302.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.