| 摘要 |
<p>PURPOSE:To obtain the thermal type flow rate detecting device wherein the attachment of foreign material in fluid is suppressed, by attaching a detecting element which has printed substrate structure wherein a temperature dependent film resistor body layer is formed to an insulating substrate so that the element is attached inclined in inclined manner with respect to the flowing direction of the fluid. CONSTITUTION:The thermal type flow rate detecting device 1 is constituted by connecting electrodes parts 3 which are formed at both ends of the detecting element 2 to two terminals 4 made of stainless wire material. The detecting element 2 is attached to a crushed flat part 4A of the terminal which is inclined by an angle theta with respect to a reference position which forms a right angle with respect to the flow F of the fluid. The angle theta is selected to be 30 deg.-60 deg.. The detecting element 2 has the printed substrate structure, wherein the temperature dependent film resistor body layer is formed in the insulating substrate of alumin and the like. In this constitution, the amount of the attachment of the foreign material such as dust in the fluid to the detecting element 2 is minimized and the lowering of accuacy can be avoided.</p> |
