Flowmeter

Patent metadata

Field	Value
Publication number	US-11262223-B2
Application number	US-202117168908-A
Country	US
Kind code	B2
Filing date	Feb 5, 2021
Priority date	Aug 8, 2018
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A flowmeter is inserted into a main passage through which a target fluid flows. The flowmeter includes a housing, a sub passage, an inlet portion, an outlet portion, a flow rate detector, and a protrusion. The housing includes a side surface and a tip end surface. A part of the target fluid flows into the sub passage from the main passage. The target fluid flows into the sub passage through the inlet portion and flows out of the sub passage through the outlet portion. The flow rate detector is configured to detect a flow rate of the target fluid flowing through the sub passage. The tip end surface includes a first end area and a second end area. The protrusion protrudes from the tip end surface and is located in both the first end area and the second end area.

First claim

What is claimed is:

1. A flowmeter inserted into, and fixed to, a main passage through which a target fluid flows, the flowmeter being configured to measure a flow rate of the target fluid in the main passage, the flowmeter comprising:
a housing including:
a side surface that extends in an insertion direction of the flowmeter; and
a tip end surface that is located on a side of the side surface in the insertion direction;

a sub passage that is defined in the housing, a part of the target fluid flowing into the sub passage from the main passage;
an inlet portion that is defined in the side surface, the target fluid flowing into the sub passage through the inlet portion from the main passage;
an outlet portion through which the target fluid flows out of the sub passage into the main passage;
a flow rate detector that is configured to detect the flow rate of the target fluid flowing through the sub passage; and
a protrusion that protrudes from the tip end surface in the insertion direction, wherein
the tip end surface includes a first end area located close to the inlet portion and a second end area opposite to the first end area,
the protrusion is located in both the first end area and the second end area; and
the protrusion includes a plurality of protrusion elements that are disposed in the first end area and the second end area.

2. The flowmeter according to claim 1 , wherein
the protrusion extends from the first end area to the second end area.

3. The flowmeter according to claim 1 , wherein
the protrusion tapers in the insertion direction when viewed from a side of the inlet portion.

4. The flowmeter according to claim 1 , wherein
the inlet portion opens in an opening direction, and
the protrusion tapers in the insertion direction when viewed in a direction perpendicular to both the insertion direction and the opening direction.

Assignees

• Denso Corp

Inventors

• Yoshida Yuusuke
• Yaoko Seiji
• Ueda Kazuaki
• Ito Kengo

Classifications

• F02M35/021

  Arrangements of air flow meters in or on air cleaner housings · CPC title

• G01F1/6842 Primary

  with means for influencing the fluid flow · CPC title

• G01F1/684

  Structural arrangements; Mounting of elements, e.g. in relation to fluid flow · CPC title

• G01F5/00 Primary

  Measuring a proportion of the volume flow · CPC title

• F02D41/18

  by measuring intake air flow · CPC title