Measuring and testing – Simulating operating condition – Marine
Patent
1997-09-02
1999-04-06
Patel, Harshad
Measuring and testing
Simulating operating condition
Marine
732025, 7320415, G01F 168
Patent
active
058921460
ABSTRACT:
A highly accurate, low-cost and easy-to-handle heating resistor type flow meter has a main air flow passage body forming a main air flow passage for allowing air flowing therethrough. A measuring module has a heating resistor for measuring a flow rate of the air inserted inside the main air flow passage body: The measuring module comprises the heating resistor inside an auxiliary air flow passage body forming an L-shaped auxiliary air flow passage having an inlet opening portion opening in a direction perpendicular to a main flow line of the air and an outlet opening portion opening in a direction parallel to the main flow line. The main air flow passage body comprises an orifice on a periphery of the inner side wall positioned in an upstream side of the air flow passage body. Both of the inlet opening portion and the outlet opening portion are arranged within a flow flux zone formed by extending the air flow from a top edge of the orifice in a direction parallel to the main flow line.
REFERENCES:
patent: 4911008 (1990-03-01), Casey
patent: 5485746 (1996-01-01), Mori et al.
Igarashi Shinya
Kobayashi Chihiro
Takasago Akira
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Patel Harshad
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