Bell mouth, air supply assembly including the bell mouth, and air supply control system using the bell mouth
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United States of America Patent
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Aug 9, 2022
Grant Date -
Mar 11, 2021
app pub date -
Sep 4, 2020
filing date -
Sep 11, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A bell mouth includes an upstream body including an upstream-side opening formed to allow air introduced from an air supply duct to pass through and an upstream measurement portion connected with a differential-pressure acquisition device that uses pressure of the air in the upstream-side opening, in which the air supply duct guides the air into a water-heating device from the outside, a differential-pressure generation part that is located downstream of the upstream body with respect to a flow direction of the air and that has a structure that reduces the pressure of the air passing through the differential-pressure generation part, and a downstream body including a downstream-side opening formed to allow the air passing through the differential-pressure generation part to pass through and a downstream measurement portion connected with the differential-pressure acquisition device that obtains a difference between the pressure of the air passing through the downstream-side opening and facing toward a blower of the water-heating device and the pressure of the air in the upstream-side opening.
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