Thermal type air flow amount measuring apparatus having flow rectifier

摘要

A thermal type air flow amount measuring apparatus is provided for measuring, a amount of air flowing in an air flow passage. The apparatus includes a bypass passage unit for bypassing a part of the air flowing through the air flow passage into the bypass passage. A flow amount measuring device is disposed in the bypass passage unit. A throttle unit is disposed upstream of the flow amount measuring device in the bypass passage unit and a support unit is disposed downstream over the throttle unit to support the flow amount measuring unit.