AIR FLOW RATE DETECTING DEVICE

摘要

The objective of the present invention is to provide an air flow rate detecting device with which the inflow of air to the reverse surface of a diaphragm is reduced, while stresses acting on a flow rate detecting unit are alleviated and variability in the mounting of the flow rate detecting unit is reduced. This air flow rate measuring device comprises: a flow rate detecting unit 602 including a diaphragm which detects the air flow rate of a gas being measured; a circuit board 400 on which the flow rate detecting unit is mounted; and a housing which accommodates the circuit board. The flow rate detecting unit and the circuit board are secured to one another using a sheet-like adhesive 803, and are secured in such a way that a surface of the flow rate detecting unit that is perpendicular to the direction of flow is sealed by means of a resilient body, and a surface of the flow rate detecting unit that is parallel to the direction of flow is open.