Title:
THERMAL TYPE FLOWMETER
Document Type and Number:
Japanese Patent JP2017215192
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a thermal type flowmeter with which it is possible to further reduce a measurement error at the pulsation time of a fluid.SOLUTION: Provided is a thermal type flowmeter comprising a sub-passage 307 for capturing a portion of a fluid flowing in a main passage and a flow rate measurement unit 451 arranged in the sub-passage 307. The sub-passage 307 includes a first passage 351 provided on the measurement surface 451a side of the flow rate measurement unit 451, a second passage 352 provided on the rear face 451b side of the flow rate measurement unit 451 and an inclined passage 361 provided downstream of an exit of the second passage 352 in the forward flow direction F of the fluid in the second passage 352. The inclined passage 361 includes a first inclined face 371 inclined, closer to the first passage 351 side than is the flow rate measurement unit 451, toward the first passage 351 side from the second passage 352 side in the forward flow direction F.SELECTED DRAWING: Figure 5
Inventors:
FUKAYA SEIJI
TASHIRO SHINOBU
UENODAN AKIRA
SAITO SUNAO
SAITO TOMOAKI
TASHIRO SHINOBU
UENODAN AKIRA
SAITO SUNAO
SAITO TOMOAKI
Application Number:
JP2016108874A
Publication Date:
December 07, 2017
Filing Date:
May 31, 2016
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
G01F1/684
Domestic Patent References:
| JPH09329473A | 1997-12-22 | |||
| JP2004226315A | 2004-08-12 | |||
| JP2006258675A | 2006-09-28 | |||
| JP2000304585A | 2000-11-02 |
Foreign References:
| WO2015045435A1 | 2015-04-02 | |||
| US20140174166A1 | 2014-06-26 |
Attorney, Agent or Firm:
Yusuke Hiraki
Sekiya Mitsuo
Toshiaki Watanabe
Sekiya Mitsuo
Toshiaki Watanabe