Thermo-sensitive type flow rate sensor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsFumiyoshi Yonezawa, Hiroyuki Uramachi, Tomoya Yamakawa
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Abstract
To effect stable connection of an electrode of a sensing element to a connecting terminal, a holder for disposing the sensing element in a predetermined flow passage is provided. The holder is further provided with a rectification structure portion for rectifying the flow of an intake fluid and a connecting terminal securing portion with the connecting terminal embedded therein for fetching a signal of the sensing element, wherein the rectification structure portion and the connecting terminal securing portion are integrally formed by insulating material.
Claims16
A thermo-sensitive type flow rate sensor in which a holder has connection terminals and a sensing element and said connection terminals and electrodes of said sensing element are connected by wire bonding,
- said connection terminals and a housing portion are provided mutually separated on one surface of said holder, said housing portion being formed as a recess in one surface of said holder,
- a protruded securing portion and protruded positioning portions are provided within said recess at ends thereof,
- said sensing element being oriented within said recess such that an upper surface of the same, having said electrodes, faces outwardly of said housing portion, and a lower surface of said sensing element, without electrodes, is adhered to an upper surface of a securing portion by an adhesive agent, whereby said lower surface contacts upper surfaces of said positioning portions, and a thermal sensitive region of said sensing element does not contact either of said securing portion and said positioning portions, and a gap is formed between said sensing element and a bottom surface of said housing recess.
Dependencies are inferred from the claim text.