Thermal flow rate measuring device
First Claim
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1. A thermal type flow rate measuring device comprising:
- an auxiliary passage defined within a main passage for introducing a part of fluid flowing through said main passage;
a thermal type flow rate measuring sensor disposed within said auxiliary passage for detecting flow rate of the fluid; and
capturing means formed on an inner periphery of said auxiliary passage for capturing liquid contained in said fluid and transferring the captured liquid from said capturing means.
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Abstract
A thermal type flow rate measuring device can certainly prevent adhesion of water droplet onto a sensor element and thus achieve high reliability. The thermal type flow rate measuring device includes an auxiliary passage defined within a main passage for introducing a part of fluid flowing through the main passage, a sensor disposed within the auxiliary passage for detecting flow rate of the fluid and capturing means formed on an inner periphery of the auxiliary passage for capturing liquid contained in the fluid and transferring the captured liquid.
32 Citations
12 Claims
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1. A thermal type flow rate measuring device comprising:
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an auxiliary passage defined within a main passage for introducing a part of fluid flowing through said main passage;
a thermal type flow rate measuring sensor disposed within said auxiliary passage for detecting flow rate of the fluid; and
capturing means formed on an inner periphery of said auxiliary passage for capturing liquid contained in said fluid and transferring the captured liquid from said capturing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A thermal type flow rate measuring device comprising:
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a thermal type flow rate measuring sensor provided within a main passage through which fluid flows for measuring flow rate of the fluid in said main passage;
said main passage being curved in a vicinity of an upstream side of said flow rate measuring sensor; and
capturing means formed on an inner periphery of said main passage for capturing liquid carried by the fluid.
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12. A thermal type flow rate measuring device in a vehicle control system including a thermal type flow rate control device, a control unit for controlling a vehicle on the basis of a condition of the vehicle detected by said thermal type flow rate measuring sensor, the thermal type flow rate measuring device including an auxiliary passage introducing a part of fluid flowing through a main passage, and a thermal type flow rate measuring sensor for detecting flow rate of the fluid, for detecting flow rate of the liquid,
at least one of a liquid capturing means and discharging means being provided on an inner periphery of said auxiliary passage.
Specification