Flow rate sensor, temperature sensor and flow rate detecting apparatus
US6588268B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2000 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | May 22, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/699
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flow rate sensor for performing a flow rate detection of fluid with high accuracy without suffering adverse effect of the environmental temperature condition even when the fluid is viscous fluid having relatively high viscosity or the flow rate is relatively small is provided. The flow rate sensor includes a flow rate detector having a heating function and a temperature sensing function, and a pipe line for fluid to be detected which is formed so that heat from the flow rate detector is transferred to and absorbed by the fluid. The temperature sensing which is affected by a heat absorption effect of the fluid due to the heat is executed in the flow rate detector, and the flow rate of the fluid in the pipe line is detected on the basis of the temperature sensing result. Unit retaining portions formed on a casing in which the pipe line is formed, the unit retaining portions being disposed adjacent to the pipe line. A flow rate detecting unit comprising the flow rate detector is retained by the unit retaining portion, and a temperature detecting unit comprising a fluid temperature detector is retained by the unit retaining portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.