Flow sensing device and electronics apparatus
First Claim
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1. A flow sensing device, comprising:
- a flow sensing element for sensing a flow of a gas;
electronics circuitry for processing a signal from said flow sensing element;
a case for protecting said electronics circuitry provided inside said case; and
trapping means for trapping corrosive compositions entering from the outside of said case into the inside thereof, wherein said flow sensing device is installed in an intake air passage of an engine by inserting said flow sensing element into said intake air passage of the engine.
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Abstract
A structure is disclosed in which a conductive material having corrosiveness equal to or higher than that of the materials constituting electronics circuitry is disposed on halfway of the diffusion path of corrosive gases between an entrance place thereof and the electronics circuitry, whereby the conductive material traps the corrosive gases.
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Citations
20 Claims
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1. A flow sensing device, comprising:
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a flow sensing element for sensing a flow of a gas;
electronics circuitry for processing a signal from said flow sensing element;
a case for protecting said electronics circuitry provided inside said case; and
trapping means for trapping corrosive compositions entering from the outside of said case into the inside thereof, wherein said flow sensing device is installed in an intake air passage of an engine by inserting said flow sensing element into said intake air passage of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A flow sensing device, comprising:
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a flow sensing element for sensing a flow of a gas;
electronics circuitry for processing a signal from said flow sensing element; and
a case for protecting said electronics circuitry provided inside said case, wherein said flow sensing device is installed in an intake air passage of an engine by inserting said flow sensing element into said intake air passage of the engine; and
wherein silver, copper, a silver alloy containing at least 83% of silver, or a copper alloy containing at least 83% of copper each of which hardly affects the function of said electronics circuitry even if it becomes corroded, is disposed inside said case in an exposed state. - View Dependent Claims (11)
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12. An electronics apparatus, comprising:
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electronics circuitry;
a case for protecting said electronics circuitry provided inside said case; and
trapping means for trapping corrosive compositions entering from the outside of said case into the inside thereof, wherein said electronics apparatus is installed in an engine room. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification