Thermal flow meter
AssigneeHitachi Automotive Systems, Ltd.
InventorsNoboru TOKUYASU, Shinobu TASHIRO, Keiji HANZAWA, Takeshi MORINO, Ryosuke DOI, Akira UENODAN
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AssigneeHitachi Automotive Systems, Ltd.
InventorsNoboru TOKUYASU, Shinobu TASHIRO, Keiji HANZAWA, Takeshi MORINO, Ryosuke DOI, Akira UENODAN
Estimating the term…
The present invention has been made to improve measurement accuracy of a thermal flow meter. In the thermal flow meter according to the invention, a circuit package (400) that measures a flow rate is molded in a first resin molding process. In a second resin molding process, a housing (302) having an inlet trench (351), a bypass passage trench on frontside (332), an outlet trench (353), and the like are formed through resin molding, and an outer circumferential surface of the circuit package (400) produced in the first resin molding process is enveloped by a resin in the second resin molding process to fix the circuit package (400) to the housing (302).
A thermal flow meter comprising:
Dependencies are inferred from the claim text.