Hot-wire type airflow meter having a flow smoothing core

Details Hot-wire type airflow meter having a flow smoothing core Hot-wire type airflow meter having a flow smoothing core

1994-08-08

1996-01-23

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Proportional

731182, 7320422, G01F 168

Patent

active

054857465

ABSTRACT:
A hot wire type airflow meter of the present invention comprises a housing defining a main passage through which air passes, a central member supported in the main passage of the housing and having an inlet portion for taking in a part of air flowing through the main passage, a bypass passage communicating with the inlet portion, and an outlet portion for returning air passing through the bypass passage to the main passage, and sensing means disposed in the bypass massage for measuring the airflow rate in the bypass passage, wherein the bypass passage comprises an upstream side meander portion which has a meandering passage at an upstream side of the sensing means, a straight tube portion formed as a straight tube and accommodating the sensing means, and a downstream side passage communicating the straight tube portion with the outlet portion. The airflow having been introduced into the housing passes through the inlet portion, and the bypass passage comprising the upstream side meander portion, straight tube portion in which the sensing means is disposed, and the downstream side passage. Then, the airflow is returned from the outlet portion to the main passage. As the dust in the airflow is excluded at the meander portion, the deterioration of measuring accuracy due to dirt in the sensing means is prevented.

REFERENCES:
patent: 3374673 (1968-03-01), Trageser
patent: 4709581 (1987-12-01), Nishimura et al.
patent: 4856328 (1989-03-01), Johnson
patent: 5201216 (1993-04-01), Miyazaki et al.
patent: 5209113 (1993-05-01), Sawada et al.

Affiliated with

Also associated with

Rating

Hot-wire type airflow meter having a flow smoothing core does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hot-wire type airflow meter having a flow smoothing core, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hot-wire type airflow meter having a flow smoothing core will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1498646